CA2104936A1 - Rapping mechanism for rapping the electrodes of an electrostatic precipitator - Google Patents
Rapping mechanism for rapping the electrodes of an electrostatic precipitatorInfo
- Publication number
- CA2104936A1 CA2104936A1 CA002104936A CA2104936A CA2104936A1 CA 2104936 A1 CA2104936 A1 CA 2104936A1 CA 002104936 A CA002104936 A CA 002104936A CA 2104936 A CA2104936 A CA 2104936A CA 2104936 A1 CA2104936 A1 CA 2104936A1
- Authority
- CA
- Canada
- Prior art keywords
- precipitator
- electrodes
- rapping
- impact
- secured
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/34—Constructional details or accessories or operation thereof
- B03C3/86—Electrode-carrying means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C3/00—Separating dispersed particles from gases or vapour, e.g. air, by electrostatic effect
- B03C3/34—Constructional details or accessories or operation thereof
- B03C3/74—Cleaning the electrodes
- B03C3/76—Cleaning the electrodes by using a mechanical vibrator, e.g. rapping gear ; by using impact
Abstract
Rapping mechanism for rapping the electrodes of an electrostatic precipitator ABSTRACT
A rapping mechanism for rapping or vibrating collecting electrodes (33 of each precipitator section or each electrode row of an elec-trostatic precipitator comprises a pair of impact beams (1,1') so arranged that the beams slide upon the upwards facing egdes of a support carrier pair (2,2') secured in the precipitator housing, an anvil (6) secured to the beam pair (1,1'), a drop hammer (7) rota-ting about a horizontal shaft, said hammer transmitting via the anvil (6) impact energy to the beam pair (1,1') between which the electrodes (3) are suspended, and whereby the electrodes (3) are rapped or vibrated through a horizontal movement of the beam pair (1,1') on the upwards facing edges of the carrier pair (2,2') without the impact energy being transmitted to the fixed construc-tion of the precipitator housing, and a spring (12) secured in the precipitator housing construction at each end of a beam pair (1,1'), said spring imparting through a stop pin (13) a recoiling movement of the beam pair back to its starting position before the anvil (6) is again hit by the drop hammer (7).
(Figure 1)
A rapping mechanism for rapping or vibrating collecting electrodes (33 of each precipitator section or each electrode row of an elec-trostatic precipitator comprises a pair of impact beams (1,1') so arranged that the beams slide upon the upwards facing egdes of a support carrier pair (2,2') secured in the precipitator housing, an anvil (6) secured to the beam pair (1,1'), a drop hammer (7) rota-ting about a horizontal shaft, said hammer transmitting via the anvil (6) impact energy to the beam pair (1,1') between which the electrodes (3) are suspended, and whereby the electrodes (3) are rapped or vibrated through a horizontal movement of the beam pair (1,1') on the upwards facing edges of the carrier pair (2,2') without the impact energy being transmitted to the fixed construc-tion of the precipitator housing, and a spring (12) secured in the precipitator housing construction at each end of a beam pair (1,1'), said spring imparting through a stop pin (13) a recoiling movement of the beam pair back to its starting position before the anvil (6) is again hit by the drop hammer (7).
(Figure 1)
Description
2~0~93~
~n~ 5h~nism for rappinq the el ctrodes of an electrostatic precipitator The invention relates to a rapping mechanism for rapping or vibra-ting the electrodes, preferably the collecting electrodes, of a high-voltage supplied electrostatic precipitator for the cleaning of smoke gases from industrial plants, power plants, etc. Such rapping is necessitated by the fact that, due to the way in which the precipitator operates, dust is deposited on the precipitator elec-trodes which must consequently be cleaned regularly of this dust during operation, said cleaning being effected by a transmission of impact energy to the electrodes thus exposing the latter to inten-sive vibration whereby the deposited dust is released.
The impact energy required for rapping or vibrating the electrodes is usually produced by a number of hammers being lifted by a rota-ting shaft extending across the precipitator width from their vertically suspended position and subsequently being released so as to revert to their vertical position. For each hammer an impact rod or an impact beam is provided which is hit by the hammer when the latter reverts to its vertical position and from the impact rod/beam the supplied impact energy is then transmitted to a section of precipitator electrodes.
The collecting electrodes usually comprise vertically suspended, narrow and substantially rectangular plates which, at their upper ends, are secured to a suspension device in a precipitator housing containing the electrodes. The latter may be arranged in mutually parallel rows or precipitator sections and the rapping is effected for the separate sections by means of drop hammers and impact rods for each section.
Rapping mechanisms of this type are known, e.g. from Duda: "Cement Data Book", 3rd edition, pp 596-598 tBauverlag GmbH - Wiesbaden und Berlin 1985), and from patent disclosures Nos. US-A-3,844,742 and EP-A-0,398,476.
In the so-called European type electrostatic precipitators are generally used drop hammers and impact rods which are connected to .: : .-:
, 21~93~
the lower ends of the collecting electrodes, and thereby represen-ting the disadvantage that the hammers and their carrier br;dges occupy comparatively much space at the end of and below the precipi-tator sections which, in turn, presupposes an increased length and height of the precipitator housing containing the sections. In the so-called American type electrostatic precipitators the rapping of the electrodes is often effected ~rom the top of the precipitator, the rapping mechanism then being mounted externally on top o~ the precipitator housing and the rapping being effected by means of small, vertically mounted impact rods which hit the electrode suspension device vertically. In this case each impact rod is provided with slide sealings around the passage through the precipi-tator housing roof. Certain types of "American" precipitators may alternatively be provided with a vertically acting rapping mechanism mounted inside the precipitator housing and which actuates the electrodes axially.
, In order to avoid absorption of the impact energy by the precipi-tator housing construction the so-called European type as well as the American type precipitators may have insulators and protectiving spring elements, discs or lea~ springs mounted between the housing construction and the rapping mechanism. It is a disadvantage of the American-type precipitators that a fracture in the rapping mecha-nism, which also acts as suspension device for the electrodes, may cause the latter to fall from the relevant precipitator section with the ensuing risk of causing a short-circuit and power cuts with a resulting precipitator shutdown. In case of American-type precipi-tators having the rapping mechanism mounted on top of the precipi-tator housing roof, the volume occupied by the aggregate precipi-tator construction in the relevant plant is substantially increased.
It is a further disadvantage of the above-mentioned hitherto known electrostatic precipitators that some of the impact energy which actuates the electrodes is immediately transmitted to the supporting construction of the precipitator construction thereby reducing the lifetime of the precipitator housing, irrespective of any optional damping of said energy by means of the inserted spring systems, and wherein energy which may usefully be used for electrode vibration is lost.
-~: . . .
. . ,:
~n~ 5h~nism for rappinq the el ctrodes of an electrostatic precipitator The invention relates to a rapping mechanism for rapping or vibra-ting the electrodes, preferably the collecting electrodes, of a high-voltage supplied electrostatic precipitator for the cleaning of smoke gases from industrial plants, power plants, etc. Such rapping is necessitated by the fact that, due to the way in which the precipitator operates, dust is deposited on the precipitator elec-trodes which must consequently be cleaned regularly of this dust during operation, said cleaning being effected by a transmission of impact energy to the electrodes thus exposing the latter to inten-sive vibration whereby the deposited dust is released.
The impact energy required for rapping or vibrating the electrodes is usually produced by a number of hammers being lifted by a rota-ting shaft extending across the precipitator width from their vertically suspended position and subsequently being released so as to revert to their vertical position. For each hammer an impact rod or an impact beam is provided which is hit by the hammer when the latter reverts to its vertical position and from the impact rod/beam the supplied impact energy is then transmitted to a section of precipitator electrodes.
The collecting electrodes usually comprise vertically suspended, narrow and substantially rectangular plates which, at their upper ends, are secured to a suspension device in a precipitator housing containing the electrodes. The latter may be arranged in mutually parallel rows or precipitator sections and the rapping is effected for the separate sections by means of drop hammers and impact rods for each section.
Rapping mechanisms of this type are known, e.g. from Duda: "Cement Data Book", 3rd edition, pp 596-598 tBauverlag GmbH - Wiesbaden und Berlin 1985), and from patent disclosures Nos. US-A-3,844,742 and EP-A-0,398,476.
In the so-called European type electrostatic precipitators are generally used drop hammers and impact rods which are connected to .: : .-:
, 21~93~
the lower ends of the collecting electrodes, and thereby represen-ting the disadvantage that the hammers and their carrier br;dges occupy comparatively much space at the end of and below the precipi-tator sections which, in turn, presupposes an increased length and height of the precipitator housing containing the sections. In the so-called American type electrostatic precipitators the rapping of the electrodes is often effected ~rom the top of the precipitator, the rapping mechanism then being mounted externally on top o~ the precipitator housing and the rapping being effected by means of small, vertically mounted impact rods which hit the electrode suspension device vertically. In this case each impact rod is provided with slide sealings around the passage through the precipi-tator housing roof. Certain types of "American" precipitators may alternatively be provided with a vertically acting rapping mechanism mounted inside the precipitator housing and which actuates the electrodes axially.
, In order to avoid absorption of the impact energy by the precipi-tator housing construction the so-called European type as well as the American type precipitators may have insulators and protectiving spring elements, discs or lea~ springs mounted between the housing construction and the rapping mechanism. It is a disadvantage of the American-type precipitators that a fracture in the rapping mecha-nism, which also acts as suspension device for the electrodes, may cause the latter to fall from the relevant precipitator section with the ensuing risk of causing a short-circuit and power cuts with a resulting precipitator shutdown. In case of American-type precipi-tators having the rapping mechanism mounted on top of the precipi-tator housing roof, the volume occupied by the aggregate precipi-tator construction in the relevant plant is substantially increased.
It is a further disadvantage of the above-mentioned hitherto known electrostatic precipitators that some of the impact energy which actuates the electrodes is immediately transmitted to the supporting construction of the precipitator construction thereby reducing the lifetime of the precipitator housing, irrespective of any optional damping of said energy by means of the inserted spring systems, and wherein energy which may usefully be used for electrode vibration is lost.
-~: . . .
. . ,:
3 2 ~
It is therefore the object of the present invention to provide a rapping mecha~ism for electrodes, preferably collecting elec~rodes, in an electrostatic precipitator, and which remedies the above-mentioned disadvantages of the prior art technique.
The object is achieved by means of a rapping mechanism of the type disclosed in the introductory part of claim 1 and which is charact-erized by the features given in the characterizing part of that claim, the collecting electrodes being at their top only secured between and to an impact rod pair comprising two flat beams bolted together, and by their weight and only with their downwardly facing edges each resting on a support carrier of a pair of support carri-ers, but without being secured to said support carriers~ and so that the impact beams may slide on the latter. The impact beams are lS hereby separated from the supporting construction of the precipita-tor whereby the impact energy imparted to the impact beams by the drop hammers is not transmitted to the supporting construction contrary to the hitherto known precipitator constructions, and so that fractures, if any, in the impact beams do not result in the collecting electrodes falling and causing short circuit in the electrostatic precipitator.
Particular embodiments of the rapping mechanism are disclosed in claims 2-4.
The invention will be explained in more detail in the following with reference to the drawings which are examples and non-limiting illustrations of embodiments of the invention, and wherein Figure 1 is a perspective view of a part of the upper portion of an electrostatic precipitator and showing three precipitator sections, Figur~s 2A, ~B and 2C are also perspective and partially exploded views of a suspension of a collecting electrode in a rapping mecha-nism according to the invention, Figure 3 is a perspective view of a rapping mechanism having acommon anvil for two precipitator sections, and -:
210~3~
~igure 4 is a precipitator section with a rapping mechanism accord-ing to the invention and supplemented with a known rapp;ng mechanism acting upon the lower part of the section.
As shown in Figures 1 and 2A the rapping mechanism of a precipitator comprises two impact beams or carriers 1,1' which in their mounted position in the precipitator housing each rests upon a support carrier 2,2' at the top of a precipitor section, and wherein the support carriers constitute a part of the precipitator frame con-struction, an anvil 6 and a drop hammer 7 which, during use, is caused to rotate about a not shown hori~ontal axis above the preci-pitator sections. The support carriers ~,2' surround in pairs the upper end of the electrodes 3 of a precipitator section and rest at each end on angular support irons 8 which are secured to a not shown wall construction of the precipitator housing. The support carriers 2,2' are provided with assembly holes 5 wherein assembly bolts 5' may be inser$ed. When an electrode 3 is to be suspended its one end is moved upwards between two carriers 2,2' together forming a carrier pair and are secured temporarily to the latter by means of an assembly bolt 5' which is placed in the assembly hole 5 of the one carrier 2 and is then passed through a corresponding assembly hole 5'' in the electrode 3 and finally into an assembly hole 5 in the other carrier 2' of the carrier pair.
Thus, with the upper end of the electrode extending upwards through the carrier pair 2,2', cf. Figure 2B, the beam pair 1,1' of the ~ ?
rapping mechanism is restingly placed upon the upwards facing edges of the carrier pair 2,2' and on each side of the electrode 3. By means of securing bolts 4' which are inserted into securing holes 4 in the beams 1,1' and 4" in the electrode the latter is suspended in the beam pair 1,1', cf. Figure 2C, whereupon the assembly bolt 5' is removed from the electrode and the support carriers 2,2' so that the electrode is now suspended from the beam pair 1,1' only. i With the anvils 6 secured, e.g. by welding, on the upwards facing edges of the beam pairs 1,1' so as to make the anvils form abutments for the drop hammers 7 the latter emit, by rotation about their rotational shaft, impact energy to the anvils 6 which energy actua-tes the beams ~ horizontally and thus vibrates the electrodes .. .. ..
' ' ' ' ' " ' ' I . ~ ' " ". "' ' ' ' ', '' " " ,' . ' ' ' ' ' ~,' " .i, , ~. " . " ,, , . : ~, `,. . .
, . . . . .
... .
.. ~ ~. . .. .
, ~ .
5 ~0~3~
suspended in the beams. As it appears most clearly from Figure 1 the supplied impact energy will make the beams 1,1' slide to the right on the upwards facing edges o~ the carriers 2,2'. This movement of the beams 1,1' is caught by leaf springs 12 being secured to angular support irons 8, each of said beams 1,1' being at their ends provi-ded with transversal bolts 13 which, by the movement, are caused to abut the leaf springs 12 which thus catch the movement of the beams 1,1' and recoil the latter to their starting position before the anvil 6 is again hit by the drop hammer 7, As will appear from Figure 3, an anvil may be of such length that it is secured to several (in the figure two) adjacent impact beam pairs 1,1' whereby the rapping of corresponding adjacent precipitator section electrodes is effected simultaneously. This construction is particularly suitable where a precipitator with only moderate rapping is required.
In the embodiment shown in F;gure 4 a rapping mechanism 1,6,7 according to the invention is combined with a rapping mechanism 10,11 of a known type and coupled to the lower ends of the elec-trodes 3. This construction is used in precipitators wherein a particularly high level of rapping is desired, presupposing, however, larger precipitator housing dimensions in order to make space for the lower rapping mechanism. The rapping level may be further increased through a convenient synchronization of the abutment o~ the drop hammers 7,11 against the anvil 6 and the rods 10, respectively.
As will appear from the above the rapping mechanism according to the invention represents in particular the following advantages:
- The impact energy from the drop hammers is transmitted directly to the electrodes without actuating the precipitator housing construction proper - As the impulse time for the individual rapping or vibrating is very short the friction between the impact beams (1,1'), and the support carriers (2,2') will have no significant influence . ~ , ~ - . . , -- ' : ,: ' . : , :, . . . , -, ........ . .. .
:
-~ , ' ~ . .
~'' ' ' ` : '. . ~
.
6 21~93~ :
- The rapping mechanism may be integrated into existing electro-static precipitator housings requiring only insignificant modifications of their constructions S - The noise level of the rapping mechanism is significantly lcwer than the noise level of corresponding known rapping mechanisms `;
being mounted on the exterior of a precipitator housing, even in case of precipitators with no screening roofs or walls.
"
:-.
~:
;,:.
:
. :
; ,:
:
:
:~
:. -: ~'.''
It is therefore the object of the present invention to provide a rapping mecha~ism for electrodes, preferably collecting elec~rodes, in an electrostatic precipitator, and which remedies the above-mentioned disadvantages of the prior art technique.
The object is achieved by means of a rapping mechanism of the type disclosed in the introductory part of claim 1 and which is charact-erized by the features given in the characterizing part of that claim, the collecting electrodes being at their top only secured between and to an impact rod pair comprising two flat beams bolted together, and by their weight and only with their downwardly facing edges each resting on a support carrier of a pair of support carri-ers, but without being secured to said support carriers~ and so that the impact beams may slide on the latter. The impact beams are lS hereby separated from the supporting construction of the precipita-tor whereby the impact energy imparted to the impact beams by the drop hammers is not transmitted to the supporting construction contrary to the hitherto known precipitator constructions, and so that fractures, if any, in the impact beams do not result in the collecting electrodes falling and causing short circuit in the electrostatic precipitator.
Particular embodiments of the rapping mechanism are disclosed in claims 2-4.
The invention will be explained in more detail in the following with reference to the drawings which are examples and non-limiting illustrations of embodiments of the invention, and wherein Figure 1 is a perspective view of a part of the upper portion of an electrostatic precipitator and showing three precipitator sections, Figur~s 2A, ~B and 2C are also perspective and partially exploded views of a suspension of a collecting electrode in a rapping mecha-nism according to the invention, Figure 3 is a perspective view of a rapping mechanism having acommon anvil for two precipitator sections, and -:
210~3~
~igure 4 is a precipitator section with a rapping mechanism accord-ing to the invention and supplemented with a known rapp;ng mechanism acting upon the lower part of the section.
As shown in Figures 1 and 2A the rapping mechanism of a precipitator comprises two impact beams or carriers 1,1' which in their mounted position in the precipitator housing each rests upon a support carrier 2,2' at the top of a precipitor section, and wherein the support carriers constitute a part of the precipitator frame con-struction, an anvil 6 and a drop hammer 7 which, during use, is caused to rotate about a not shown hori~ontal axis above the preci-pitator sections. The support carriers ~,2' surround in pairs the upper end of the electrodes 3 of a precipitator section and rest at each end on angular support irons 8 which are secured to a not shown wall construction of the precipitator housing. The support carriers 2,2' are provided with assembly holes 5 wherein assembly bolts 5' may be inser$ed. When an electrode 3 is to be suspended its one end is moved upwards between two carriers 2,2' together forming a carrier pair and are secured temporarily to the latter by means of an assembly bolt 5' which is placed in the assembly hole 5 of the one carrier 2 and is then passed through a corresponding assembly hole 5'' in the electrode 3 and finally into an assembly hole 5 in the other carrier 2' of the carrier pair.
Thus, with the upper end of the electrode extending upwards through the carrier pair 2,2', cf. Figure 2B, the beam pair 1,1' of the ~ ?
rapping mechanism is restingly placed upon the upwards facing edges of the carrier pair 2,2' and on each side of the electrode 3. By means of securing bolts 4' which are inserted into securing holes 4 in the beams 1,1' and 4" in the electrode the latter is suspended in the beam pair 1,1', cf. Figure 2C, whereupon the assembly bolt 5' is removed from the electrode and the support carriers 2,2' so that the electrode is now suspended from the beam pair 1,1' only. i With the anvils 6 secured, e.g. by welding, on the upwards facing edges of the beam pairs 1,1' so as to make the anvils form abutments for the drop hammers 7 the latter emit, by rotation about their rotational shaft, impact energy to the anvils 6 which energy actua-tes the beams ~ horizontally and thus vibrates the electrodes .. .. ..
' ' ' ' ' " ' ' I . ~ ' " ". "' ' ' ' ', '' " " ,' . ' ' ' ' ' ~,' " .i, , ~. " . " ,, , . : ~, `,. . .
, . . . . .
... .
.. ~ ~. . .. .
, ~ .
5 ~0~3~
suspended in the beams. As it appears most clearly from Figure 1 the supplied impact energy will make the beams 1,1' slide to the right on the upwards facing edges o~ the carriers 2,2'. This movement of the beams 1,1' is caught by leaf springs 12 being secured to angular support irons 8, each of said beams 1,1' being at their ends provi-ded with transversal bolts 13 which, by the movement, are caused to abut the leaf springs 12 which thus catch the movement of the beams 1,1' and recoil the latter to their starting position before the anvil 6 is again hit by the drop hammer 7, As will appear from Figure 3, an anvil may be of such length that it is secured to several (in the figure two) adjacent impact beam pairs 1,1' whereby the rapping of corresponding adjacent precipitator section electrodes is effected simultaneously. This construction is particularly suitable where a precipitator with only moderate rapping is required.
In the embodiment shown in F;gure 4 a rapping mechanism 1,6,7 according to the invention is combined with a rapping mechanism 10,11 of a known type and coupled to the lower ends of the elec-trodes 3. This construction is used in precipitators wherein a particularly high level of rapping is desired, presupposing, however, larger precipitator housing dimensions in order to make space for the lower rapping mechanism. The rapping level may be further increased through a convenient synchronization of the abutment o~ the drop hammers 7,11 against the anvil 6 and the rods 10, respectively.
As will appear from the above the rapping mechanism according to the invention represents in particular the following advantages:
- The impact energy from the drop hammers is transmitted directly to the electrodes without actuating the precipitator housing construction proper - As the impulse time for the individual rapping or vibrating is very short the friction between the impact beams (1,1'), and the support carriers (2,2') will have no significant influence . ~ , ~ - . . , -- ' : ,: ' . : , :, . . . , -, ........ . .. .
:
-~ , ' ~ . .
~'' ' ' ` : '. . ~
.
6 21~93~ :
- The rapping mechanism may be integrated into existing electro-static precipitator housings requiring only insignificant modifications of their constructions S - The noise level of the rapping mechanism is significantly lcwer than the noise level of corresponding known rapping mechanisms `;
being mounted on the exterior of a precipitator housing, even in case of precipitators with no screening roofs or walls.
"
:-.
~:
;,:.
:
. :
; ,:
:
:
:~
:. -: ~'.''
Claims (4)
1. A rapping mechanism for rapping or vibrating the electrodes of an electrostatic precipitator and wherein the collecting electrodes (3) comprise vertically suspended, narrow and substantially rectan-gular plates which, at their upper ends, are secured to a suspension device (4,4',4"), and wherein the rapping mechanism is constituted of drop hammers (7) which are rotating in the vertical plane and about horizontal shafts, said drop hammers being through their rotation caused to act against horizontal impact rods or impact beams (1) which, at the top and at the bottom of the precipitator, are connected to the electrodes (3), and which, when influenced by a hammer (7), transmit the supplied impact energy to a row or a section of precipitator electrodes (3), c h a r a c t e r i z e d in that, at the upper part of the precipitator housing, horizontally arranged support carriers (2,2') in pairs surround the upper ends of the electrodes (3) of a precipitator section, that, at their upper ends, the electrodes (3) are secured between and to beams (1,1') acting as impact beams and which are arranged horizontally and in pairs and movably in the horizontal plane of the relevant section each rests upon the upwards facing edges of support carriers (2,2'), that at least one anvil (6) forming an abutment for a rotating drop hammer (7) is secured to the edges of the impact beam pair (1,1') facing away from the electrodes, and in that resilient elements (12) are mounted in the fixed construction of the precipitator housing at the end of each impact beam pair (1,1'), for moving the impact beams (1,1') back to their starting position after a rapping or vibrating movement.
2. A rapping mechanism according to claim 1, c h a r a c t e r -i z e d in that one and the same anvil (9) is secured to more precipitator sections, the anvil (9) thus having a sufficient length perpendicularly to the width of the section to permit securing of the anvil (9) to the upper edges of several pairs of impact beams (1,1').
3. A rapping mechanism according to claims 1 and 2, c h a r a c -t e r i z e d in that it further comprises impact rods or beams (10) known per se and secured to the lower ends of the electrodes of a precipitator section and forming an abutment for rotating drop hammers (11) at least with one of their ends.
4. A rapping mechanism according to claims 1-3, c h a r a c -t e r i z e d in that it comprises means to synchronize the hammer impacts at the top and at the bottom, respectively, of the electro-des (3), so that a given minor diffence in time occurs between the respective hammer abutments to the anvils (6,9) and to the lower impact rods (10).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DK107692A DK107692A (en) | 1992-08-28 | 1992-08-28 | Banking mechanism for knocking an electrofilter's electrodes |
| DK1076/92 | 1992-08-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2104936A1 true CA2104936A1 (en) | 1994-03-01 |
Family
ID=8100732
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002104936A Abandoned CA2104936A1 (en) | 1992-08-28 | 1993-08-26 | Rapping mechanism for rapping the electrodes of an electrostatic precipitator |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US5366540A (en) |
| EP (1) | EP0584880B1 (en) |
| CN (1) | CN1065782C (en) |
| CA (1) | CA2104936A1 (en) |
| DE (1) | DE69307221T2 (en) |
| DK (1) | DK107692A (en) |
| ES (1) | ES2097440T3 (en) |
| PL (1) | PL171595B1 (en) |
Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5554210A (en) * | 1994-01-11 | 1996-09-10 | FLS Milj.o slashed. A/S | Suspension device and a rapping mechanism for electrodes in an electrostatic precipitator |
| SE512249C2 (en) * | 1995-06-20 | 2000-02-21 | Flaekt Ab | Device at an electrofilter for hanging, and knocking out precipitating electrodes |
| US5725638A (en) * | 1996-11-21 | 1998-03-10 | Environmental Elements Corp. | Modular electrostatic precipitation dust collection plate assembly |
| US6951580B1 (en) * | 2004-04-13 | 2005-10-04 | Nisource Corporate Services Company | Method for minimizing bowing of collector plates in an electrostatic precipitator, and a collector plate-clip combination |
| US7438743B2 (en) * | 2006-02-23 | 2008-10-21 | Hamon Research -Cottrell, Inc. | Method of making replacement collecting electrodes for an electrostatic precipitator |
| US7468094B2 (en) * | 2006-02-23 | 2008-12-23 | Hamon Research—Cottrell Inc. | Method of repairing an electrostatic precipitator |
| DE102007044838B4 (en) * | 2007-09-14 | 2009-07-30 | Salzgitter Mannesmann Gmbh | Knocking device for precipitation electrodes in electrostatic precipitators |
| JP2009255059A (en) * | 2008-03-24 | 2009-11-05 | Hitachi Plant Technologies Ltd | Structure for attaching dust collection electrode of wet electric dust collector |
| DE102009060254A1 (en) * | 2009-07-10 | 2011-01-13 | Sms Elex Ag | electrostatic precipitator |
| PL2471602T3 (en) * | 2010-12-29 | 2014-05-30 | General Electric Technology Gmbh | Electrical screening device for structures near high voltage parts of electrostatic precipitators |
| CN106914458A (en) * | 2015-12-24 | 2017-07-04 | 天津海德浩天科技发展有限公司 | A kind of intelligent vibration deashing device for reaction tower |
| CN112427144A (en) * | 2020-10-31 | 2021-03-02 | 张家港市金秋环保科技有限公司 | Frame shell structure of high-voltage electrostatic range hood |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US1903640A (en) * | 1931-08-22 | 1933-04-11 | Research Corp | Electrical precipitator |
| US3729815A (en) * | 1971-01-25 | 1973-05-01 | Koppers Co Inc | Method for installing multiples of dust collector plates |
| GB1330612A (en) * | 1972-02-18 | 1973-09-19 | Smidth & Co As F L | Electrostatic dust precipitator |
| US4218225A (en) * | 1974-05-20 | 1980-08-19 | Apparatebau Rothemuhle Brandt & Kritzler | Electrostatic precipitators |
| SU523712A1 (en) * | 1974-07-01 | 1976-08-05 | ||
| JPS5251173A (en) * | 1975-10-21 | 1977-04-23 | Mitsubishi Heavy Ind Ltd | Structure for supporting dust-collecting electodes |
| US4093431A (en) * | 1976-12-13 | 1978-06-06 | American Air Filter Company, Inc. | Rapping assembly and electrode supports for electrostatic precipitators |
| DE2904339A1 (en) * | 1979-02-06 | 1980-08-14 | Metallgesellschaft Ag | MULTI-FIELD ELECTROFILTER |
| US4502870A (en) * | 1983-03-21 | 1985-03-05 | Combustion Engineering, Inc. | Method and apparatus for controlling tumbling hammer rapper for electrostatic precipitator |
| SE452956B (en) * | 1984-11-05 | 1988-01-04 | Flaekt Ab | FOR A MULTIPLE EMISSION ELECTRODES DETERMINED FAST HOLDING DEVICE |
| GB8522312D0 (en) * | 1985-09-09 | 1985-10-16 | Dresser Uk Ltd | Electro-precipitation |
| GB2231513A (en) * | 1989-05-08 | 1990-11-21 | Fls Milj A S | Rapping mechanism |
-
1992
- 1992-08-28 DK DK107692A patent/DK107692A/en not_active Application Discontinuation
-
1993
- 1993-08-24 ES ES93202476T patent/ES2097440T3/en not_active Expired - Lifetime
- 1993-08-24 EP EP93202476A patent/EP0584880B1/en not_active Expired - Lifetime
- 1993-08-24 DE DE69307221T patent/DE69307221T2/en not_active Expired - Fee Related
- 1993-08-26 US US08/112,859 patent/US5366540A/en not_active Expired - Fee Related
- 1993-08-26 CA CA002104936A patent/CA2104936A1/en not_active Abandoned
- 1993-08-27 PL PL93300224A patent/PL171595B1/en unknown
- 1993-08-28 CN CN93117044A patent/CN1065782C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| US5366540A (en) | 1994-11-22 |
| ES2097440T3 (en) | 1997-04-01 |
| EP0584880B1 (en) | 1997-01-08 |
| DE69307221D1 (en) | 1997-02-20 |
| DK107692A (en) | 1994-03-01 |
| PL300224A1 (en) | 1994-03-07 |
| EP0584880A1 (en) | 1994-03-02 |
| CN1065782C (en) | 2001-05-16 |
| DE69307221T2 (en) | 1997-07-17 |
| PL171595B1 (en) | 1997-05-30 |
| CN1084783A (en) | 1994-04-06 |
| DK107692D0 (en) | 1992-08-28 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CA2104936A1 (en) | Rapping mechanism for rapping the electrodes of an electrostatic precipitator | |
| EP0665061B1 (en) | Electrostatic precipitator | |
| DK172419B1 (en) | Suspension device and banking mechanism for electrodes in an electro filter | |
| EP0833693B1 (en) | An electrostatic precipitator with a device for suspending, guiding and rapping of collecting electrodes | |
| KR100230499B1 (en) | Vibrating apparatus | |
| US3570217A (en) | Cleaning device for electrostatic dust collector discharge electrodes | |
| US3920085A (en) | Swing hammer rapping system for electrostatic precipitator | |
| EP1301282B1 (en) | Electrostatic separation apparatus and method using box-shaped electrodes | |
| GB1588057A (en) | Rapping assembly and electrode supports for electrostatic precipitators | |
| RU193625U1 (en) | Horizontal multi-field electrostatic precipitator | |
| AU2001272573A1 (en) | Electrostatic separation apparatus and method using box-shaped electrodes | |
| RU2211093C2 (en) | Horizontal multifield electric filter | |
| EP0662347A1 (en) | A suspension device and a rapping mechanism for electrodes in an electrostatic precipitator | |
| US4747856A (en) | Lower end alignment device for electrostatic precipitator collector electrodes | |
| US4769049A (en) | Side rapping drag hammer apparatus for electrostatic precipitators | |
| RU2277008C1 (en) | Dry horizontal multistage precipitator | |
| RU2251458C1 (en) | Horizontal electric filter | |
| EP0257785B1 (en) | Rapping mechanism for rapping the electrodes of an electrostatic precipitator | |
| US4183735A (en) | Rapping system for electrostatic precipitators | |
| KR20130017449A (en) | Raw material treatment apparatus | |
| SU1562025A1 (en) | Electric precipitator | |
| WO1990004466A8 (en) | Screening device for particulate material | |
| SU567497A1 (en) | Electric filter-precipitator | |
| SU1706726A1 (en) | Sizing screen | |
| PL192637B1 (en) | Small-size electrofilter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |