WO2006019456A2 - Apparatus and process for cooling and de-steaming calcined stucco - Google Patents
Apparatus and process for cooling and de-steaming calcined stucco Download PDFInfo
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- WO2006019456A2 WO2006019456A2 PCT/US2005/017485 US2005017485W WO2006019456A2 WO 2006019456 A2 WO2006019456 A2 WO 2006019456A2 US 2005017485 W US2005017485 W US 2005017485W WO 2006019456 A2 WO2006019456 A2 WO 2006019456A2
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- WIPO (PCT)
- Prior art keywords
- plenum
- stucco
- water
- outlet
- orifice
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B7/00—Hydraulic cements
- C04B7/36—Manufacture of hydraulic cements in general
- C04B7/43—Heat treatment, e.g. precalcining, burning, melting; Cooling
- C04B7/47—Cooling ; Waste heat management
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B11/00—Calcium sulfate cements
- C04B11/007—After-treatment of the dehydration products, e.g. aging, stabilisation
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B11/00—Calcium sulfate cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B28/00—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements
- C04B28/14—Compositions of mortars, concrete or artificial stone, containing inorganic binders or the reaction product of an inorganic and an organic binder, e.g. polycarboxylate cements containing calcium sulfate cements
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B9/00—Magnesium cements or similar cements
- C04B9/04—Magnesium cements containing sulfates, nitrates, phosphates or fluorides
Definitions
- the present invention relates to an improved apparatus and process for cooling and de-steaming calcined gypsum stucco (calcium sulfate hemihydrate).
- the cooling of gypsum stucco has been of interest in the gypsum industry for many decades. Stucco is physically and thermodynamically unstable at high temperatures. In order to maintain its quality, the stucco should be quickly aerated and cooled below the temperature of calcination (250° F.). This is especially true when the calcined stucco is to be stored over time.
- An example of a stucco cooler is U.S. Patent 6,138,377 assigned to U.S. Gypsum Company, and that disclosure is incorporated here by reference.
- Hot and steamy calcined stucco stored in containers will age over time. This aging process adversely affects many of the desirable properties of the stucco, including pouring consistency, hydration rate, set time, response to accelerator, and potential for strength development. If a storage silo does not empty its contents on a "first-in-first-out" basis, the quality of the stucco removed from storage can vary drastically. Thus, the cooling and de-steaming of calcined stucco before storage is essential to long-term age stability.
- Previous coolers such as the coil cooler described in U.S. Patent 6,138,377 have a high initial capital cost. Specifically, the coils and heat transfer fluid system used in a coil cooler are expensive. Also, a much larger coil cooler is required to cool the same stucco throughput compared to the invention described herein. Further, when the stucco cooled with the apparatus described herein is used to make products such as wall board, the amount of water and additives required is reduced when compared to stucco cooled in other ways. Thus, the invention described herein enjoys an economic and performance advantage over the prior art coolers.
- the present invention is an apparatus and process for cooling and de-steaming hot calcined stucco, such as that used in the production of gypsum boards or plaster products.
- the apparatus is a fluid bed stucco cooler, the cooler including a water spray apparatus to spray water on the stucco.
- hot and steamy calcined stucco is transferred to the cooler from a calcination kettle, and the stucco is then cooled and de-steamed.
- the cooler can be implemented in a stucco processing line where the stucco may be stored for a period of time after the cooling process, or it can also be directly implemented into a gypsum board production line where the stucco is made available for immediate use.
- Each cooler unit may stand alone or several may be connected in series or parallel, depending on the processing output and cooling requirements of the system.
- the cooler in its basic description comprises a cooler housing having a plenum and a stucco inlet and a stucco outlet.
- the cooler further includes a water spray apparatus or distributor to spray and distribute fluid, preferably water, in the plenum.
- the cooler also includes a fiuidization pad and an agitator, to move and distribute the stucco within the plenum. Further, refinements, such as the use of compressed air to prevent clogging of the water spray apparatus, are also disclosed.
- Hot and steamy stucco powder enters the plenum from a calcination kettle at a temperature of in the range of 290° to 320 0 F and is transported to a cooler and is fluidized by a fiuidization pad positioned at the bottom of the plenum of the cooler housing.
- the stucco entering the cooler may be at a temperature lower than the temperature exiting the calcination kettle.
- the stucco may be at a temperature as low as 260 to 250 0 F.
- the fiuidization pad is a generally cylindrical chamber having a perforated top surface and a bottom surface with an air inlet. As described in U.S. Patent No. 6,138,377, the fiuidization pad can be any shape, including square or rectangular.
- the fiuidization pad is of relatively short height as compared to the plenum height and is positioned such that the perforated top surface comprises the bottom surface of the plenum. Air supplied by a blower enters the air inlet and is diffused through the perforated top surface and introduced into the plenum of the cooler housing.
- an agitator unit is used to mix the stucco powder with the air to prevent channeling of the air directly through the powder, especially with natural stucco.
- the agitator unit has an agitator propeller mounted on a shaft that passes thought the top of the housing and extends downward to the propeller, which is preferably positioned just above the perforated top of the fiuidization pad.
- the agitator extends from the bottom of the housing, and the shaft passes through a tube in the fiuidization pad such that the propeller is positioned just above the perforated top surface of the fiuidization pad.
- Each agitator unit also has a seal unit to prevent stucco from exiting the plenum at the location of the shaft.
- the agitator unit is driven by a motor at an appropriate RPM to insure adequate fiuidization.
- One skilled in the art will recognize that one or more agitators may be used and they may extend from the fluid bed, as described in U.S. Patent 6,138,377.
- the cooler includes an air outlet.
- Such an outlet is described in U.S. Patent 6,138,377.
- the air outlet is located at the top of the cooler housing and is in direct fluid communication with the plenum, thus allowing the removal of steam from the plenum.
- a disengagement zone is provided at the top of the plenum of the housing below the air outlet. The disengagement zone is an upwardly extending portion of the plenum that provides additional plenum space to allow the stucco powder particles to fall back from the exiting air, thus reducing entrainment of the particles in the air that exits through the air outlet.
- a water spray apparatus is present in the plenum to spray water or other fluid, which cools the stucco.
- a fixed orifice or a plurality of fixed orifices can be used.
- a nozzle is fixed in an aperture in the plenum wall, and a source of water is connected to the aperture from the exterior of the plenum.
- experimentation revealed that the stucco collected on and around the fixed point of water distribution, causing a buildup of stucco around the fixed point or points of distribution, hampering the operation, and requiring frequent shut down and disassembly for cleaning.
- a disk or other rotating member or distributor having a plurality of orifices or nozzles is mounted on a rotatable shaft.
- the shaft includes a channel or conduit to provide water to the nozzles of the disk.
- a motor is connected to the shaft to rotate the shaft and hence the disk. The rotation causes any stucco that may try to adhere to the nozzles or area around the nozzles to be cast off, thus alleviating the collection of stucco on the nozzles and eliminating or reducing the build up of stucco around the nozzles and clogging of the cooler with set gypsum.
- the stucco By operation of the fluidization pad, and water spray, the stucco is thereby cooled and de-steamed when it reaches the stucco outlet at the top of the plenum chamber.
- the cooled and de-steamed stucco is typically at a temperature between 250 0 F and 220°F when it exits the cooler housing, well below the calcination temperature of 250 0 F.
- the cooled and de-steamed stucco may then be stored without the risk of substantial adverse effects due to aging, or use in manufacturing processes. If cooled below 212°F, the evaporation temperature, the stucco is preferably dried and further cooled by feeding the stucco to a second fluidization bed. This second bed acts as a drier to evaporate remaining water, as well as cooling the stucco.
- FIG. 1 is a front elevational view of the fluid bed stucco cooling apparatus described herein, including cut-away showing the water spray disk.
- FIG. 2 is a side elevational view of the fluid bed stucco cooling apparatus of FIG. 1.
- FIG. 3 is a top view of the fluid bed stucco cooling apparatus, showing the baffle.
- FIG. 4 is a top view of the fluid bed stucco cooling apparatus, including a cut ⁇ away showing the water spray disk.
- FIG. 5 is a side view of the water spray assembly, including a cut-away showing the shaft and disk inside the plenum.
- FIG. 6 is a front view of the water spray disk.
- FIG. 7 is an edge-on view of the water spray disk.
- FIG. 8 is a side elevational view of an alternate embodiment of the fluid the bed stucco cooling apparatus having an air outlet.
- FIG. 9 is a side elevational view of an alternate embodiment of the fluid bed stucco cooling apparatus, having an agitator mounted through the fluidization bed.
- FIG. 10 is a schematic outline of the air and water feeds to the stucco cooler.
- the stucco cooler apparatus 20 essentially comprises a housing 21 having a plenum 22 therein.
- the housing 21 is generally cylindrical, although other shapes may be used.
- the plenum 23 is 24 inches in diameter and approximately 7.5 feet tall.
- the housing may have other dimensions, depending upon the application and desired throughput.
- a plenum designed for an 80 ton per hour throughput has a diameter of 36 inches.
- the cooler housing 21 has a stucco inlet 19 and a stucco outlet 29, both located near the top of the cooler housing 21.
- a baffle 23 is placed in the plenum 22 sidewall near the stucco outlet 29 to control flow out of the outlet 29.
- Both the stucco inlet 19 and stucco outlet 29 are in fluid communication with the plenum 22.
- Both the stucco inlet 19 and the stucco outlet 29 are sized to accommodate a flow of stucco desired as the throughput.
- Hot and steamy stucco powder enters the plenum 22 of the stucco cooler 20 from a calcination kettle (not shown) at a temperature typically in the range of260 o F to 320°F.
- stucco flows into the plenum 22 thru inlet 19 and is cooled by the air flow from the fluidization pad 30 and water from the spray distributor 66, and then expelled out the outlet 29.
- the cooled stucco can then be bagged, or sent to other processing stations, such as wall board manufacturing lines.
- the stucco cooler apparatus 20 can stand alone or be connected in series or parallel with several other coolers, depending upon the cooling requirements of the system.
- the stucco cooler apparatus 20 is compact and upright, thereby minimizing the plant floor area occupied.
- legs 25 are provided on the cooler housing 21 in order to support the stucco cooler apparatus 20 in an upright position.
- legs 25 are provided on the cooler housing 21 in order to support the stucco cooler apparatus 20 in an upright position.
- a fluidization pad 30 is provided at the bottom of the cooler housing 21.
- the fluidization pad 30 is a generally cylindrical chamber having a perforated top surface 32 and a bottom surface 33 with an air inlet 46.
- the perforated top surface 32 is a sandwich of silica fibers or other fluidization media compressed between two perforated plates.
- the plates have 3/8" diameter holes spaced on 9/16" staggered centers, resulting in an open area of approximately 40%.
- Other fluidization media known to one skilled in the art could be used, such as a stainless steel mesh.
- cylindrical in the preferred embodiment the fluidization pad 30, and the plenum 22, may be in any shape.
- the fluidization pad 30 is attached to the bottom of the cooler housing 21.
- the perforated top surface 32 forms the bottom of the plenum 22.
- the fluidization media diffuses the air as it enters the plenum 22.
- Air provided by a blower enters the fluidization pad 30 through the air inlet 46 and is diffused through the perforated top surface 32 and introduced into the plenum 22 of the cooler housing 21.
- This air helps to fluidize the stucco powder so that it effectively flows through the plenum 22.
- This air flow is also used to help remove the steam from the stucco powder.
- an optional agitator 34 is used to mix the stucco powder with the air.
- the agitator 34 may be omitted as the cooler 20 will function without the agitator unit 34.
- the agitator 34 has an agitator propeller 37 mounted on a shaft 36 that passes through the top 15 of the housing 21, such that the propeller 37 is positioned just above the perforated top surface 32 of the fluidization pad 30.
- the propeller need not be of any particular shape.
- the propeller 37 is a pair of %" wide by 2 inch tall stainless steel bars extending from the shaft to near the walls of the plenum 22.
- the propeller 37 is of a size that allows it to rotate without contacting the walls of a plenum 22.
- the agitator 34 also has a transmission unit 38.
- the transmission unit 38 converts the horizontal rotation of the motor 40 into vertical rotation for the shaft 36.
- the transmission unit 38 also includes a bearing to hold the shaft 36 in a rotably fixed position.
- the transmission unit 38 is a gear motor supplied by FaIk having a part number 05UWFQZA71AB.
- FaIk having a part number 05UWFQZA71AB.
- Air is provided to the seal 39 by a conduit from outside the transmission unit 38 to the seal 39.
- the conduit is connected by hoses or piping to a plant source of compressed air 119 as shown in Figure 10.
- the air is regulated to a pressure of 1 psi, or a pressure just sufficient to keep the stucco from exiting the plenum 22 at the aperture.
- the motor 40 runs at approximately 60 RPM, although other rotation speeds will work.
- the agitator unit 34 extends upward into the plenum 22 through the fluidization pad 30.
- the shaft 36 runs through a tube 170 extending from the bottom of the housing 21 and through the perforated top surface 32.
- the alternative embodiment of the agitator unit, extending through the fluidization pad 30 is similar to the agitator unit previously described.
- a baffle 23 is provided at the stucco outlet 29 to reduce or prevent the stucco from traveling directly from the stucco inlet 19 to the stucco outlet 29.
- the baffle 23 is a 10 gauge stainless steel plate attached to the wall of the housing 21.
- the baffle 23 includes a main portion 13 approximately 8 3 A" wide, flanked by two side portions 14 approximately 4 7/8" inches wide.
- the side portions 14 are arranged at an angle of approximately 130° to the surface of the main portion 13. When the baffle 23 is attached to the housing 21, it occupies an arc of approximately 80°.
- the baffle 23 is preferably of sufficient size so as to exceed the dimensions of the stucco outlet 29.
- the housing 21 further includes an inspection port 18.
- the inspection port 18 can be fitted with a removable metal Hd to allow for access in to the plenum 22.
- the inspection port 18 may also be fitted with a clear lid, allowing observation of the plenum 22 during operation of the cooler 20.
- the inspection port 18 can be left open to the ambient air, or fitted with appropriate duct work, to provide an air outlet 150, as discussed later.
- the stucco outlet 29 leads to an extension tube 28 that extends in a generally downward direction, along the side of the housing 21.
- a discharge outlet 27 Near the bottom of the plenum is a discharge outlet 27, in selective fluid communication with the extension tube.
- the fluid communication is regulated by a valve, which is normally in the closed position. The valve is opened when the operator desires to empty the plenum 22 of stucco, such as after shutdown of the process line, or in the event of an overfill condition.
- a second discharge outlet 31 can be located in the housing approximately 180° from the first, to increase the rate of discharge, and to more easily completely clear the plenum 22 of stucco.
- the second discharge outlet 31 need not be connected to the extension tube 28, although it can be in order to provide a contained path to dispose of the stucco.
- the stucco cooler apparatus 20 achieves fluidization by a low pressure blower in connection with the fluidization pad 30 and agitator units 34.
- a blower having a capacity of approximately 20 cfm per square foot of horizontal cross-sectional area of the plenum 22 and providing a pressure head of approximately 6 psi is utilized. This creates the required pressure differential to allow fluidization of the stucco powder in the stucco cooler 20.
- the water spray or distributor apparatus of the preferred embodiment includes a motor 60, a shaft 62 having a channel 64 for communication of fluid there through, and a spray distributor 66, including a plurality of channels 92 in fluid communication with channel 64 of the shaft 62.
- the motor 60 is preferably an electric motor capable of turning the shaft 62 and spray distributor 66 assembly at a rotation speed of 1750 RPM.
- the motor includes a drive shaft 70 and a drive pully 72.
- a pully 74 is mounted on the shaft 62 and connected to the drive pully 72 by a drive belt 76.
- One skilled in the art will recognize other arrangements can be used to transfer power from the motor to the shaft, such as a gear box or direct drive of the shaft.
- the motor 60 and shaft 62 are mounted on a support assembly 80.
- the support assembly 80 is fastened or welded to the outside of the housing 21.
- the shaft 62 is mounted to the support assembly 80 by bearings 82, which allow the shaft 62 to rotate about its axis.
- the shaft is positioned in a generally horizontal position and extends into the plenum 22 through an aperture in the housing 21.
- a shaft seal 81 is fitted around the shaft 62 at the point of entry into the aperture.
- the shaft seal 81 keeps material from within the plenum 23 from exiting at the aperture.
- the shaft seal 81 includes an air channel to allow communication of compressed air from the exterior of the seal, to the interior of the seal.
- CinchSeal® brand seals manufactured by Damar Inc. of Cherry Hill, New Jersey.
- compressed air from a plant compressed air source 119 typically in the range of 80 to 100 psi, is reduced to 5-15 psi and supplied to the shaft seal 81 by suitable pipes or hose.
- the spray distributor 66 shown in detail in Figures 6 and 7, is a generally circular shaped disk. It need not be circular, but may be of any convenient shape. In the preferred embodiment, the spray distributor 66 is approximately 4" in diameter and %" thick about its disk portion 95.
- the interior of the spray distributor 66 includes a plenum 90. Extending from the plenum 90 to the perimeter of the spray distributor 66 are spray channels 92 having orifices to the atmosphere.
- the spray channels 92 allow fluid in the plenum 90 to be expelled from the spray distributor 66. In the preferred embodiment, there are eight spray channels 92. One will recognize the number can be varied to suit a desired water application rate. In the preferred embodiment, the spray channels 92 are approximately 1/16" in diameter. The diameter and any other dimensions of the spray channels 92 may vary with the desired application rate and distribution pattern desired. Nozzles may be fitted to the spray channels 92 to create patterned spray, although they are not necessary to achieve the desired cooling results.
- the spray distributor 66 includes a collar portion 94 to provide attachment to the shaft 26.
- threads (not shown) in the collar 94 are used to attach the collar portion 94 to corresponding threads (not shown) on the shaft 62.
- Rivets, welds, adhesives, and set screws are some examples.
- the shaft 62 and spray distributor 66 could be formed as a single piece. In the preferred embodiment, the spray distributor 66 is formed of two pieces.
- a cover 102 Such a construction allows access into the plenum 90 when the cover 102 is removed, and also makes manufacture by machining possible. Such construction also permits cleaning of the spray channels 92.
- the cover is retained by fasteners 104.
- the fasteners 104 are screws, however other removable fasteners could be used. If interior access is not desired, the cover 102 could be joined to the main body 100 by welds or adhesive.
- the spray distributor 66 can be an arrangement of conduits extending radially from the shaft 62.
- the conduits are in fluid communication with the channel 64, allowing fluid to be passed from the channel 64 to the conduits and expelled from the conduits at orifaces.
- the conduit need not extend perpendicular to the axis of the shaft, but could also be placed at angles to the shaft, so long as the rotational forces created when the assembly rotates are sufficient to keep stucco from building up or adhering to the distributor 66.
- the spray distributor 66 can be eliminated by placing radial channels in the shaft 62, allowing for communication of fluid from the channel 64 to the radial channels, and out into the plenum 22.
- the shaft 62 extends across part or all of the diameter of the plenum 22, with radial channels placed at various locations along the shaft's length within the plenum 22.
- water is provided to the rotating shaft 62 by a fluid coupling 96.
- a fluid coupling 96 is a high speed single flow rotating joint number 9177K32 supplied by McMaster-Carr.
- the fluid coupling 96 allows a fixed pipe or hose 97 to provide water to the channel 64 of the rotating shaft 62.
- the water may be provided by any number of sources, such as city tap water, a gravity feed tank or a pump, so long as sufficient water can be delivered. In the preferred embodiment, as outlined in Figure 10, the water is delivered from the city tap 115 and held in a 30 gallon head tank. Water is drawn from the tank by a water pump 110 capable of pumping 5 gallons per minute.
- the cooling taking place in the stucco cooler can be regulated by adjusting the amount of water delivered by the spray distributor 66.
- the water pump 110 supplies water to a 3 -way valve assembly having an input for water 121 and an input for compressed air 122 from the plant compressed air source 119, and an output 123 for providing any mixture of the two inputs, including all of air or water.
- the valve output is connected by suitable conduit to the fluid coupling 97 for delivery to the water spray distributor 66 by way of the channel 64 in the shaft 62.
- either air or water is delivered from the output 123. In a typical application, air is delivered at approximately 80 to 100 psi to the valve.
- the valve is controlled by a controller 130 that receives a signal from a thermocouple or other temperature sensor 135 placed in the plenum 22.
- the controller 130 senses a temperature of less than 212°F, it adjusts the valve assembly 120 so that only air is delivered to the spray distributor 66.
- the temperature is equal to, or above 220 0 F, the valve assembly 120 is adjusted so water is delivered to the spray distributor 66.
- air or water is supplied to the distributor any time there is stucco in the plenum 22, to prevent any stucco from entering the distributor 66 possibly causing clogging of the distributor 66.
- the steam from the stucco mixture is forced upward and out of the plenum 22 through an air outlet 150.
- the air outlet 150 is located at or near the top of the cooler housing 21, and above the level of the stucco outlet 29, thus allowing the removal of steam from the plenum 22.
- the disengagement zone 160 is an upwardly extending portion of the plenum 22 located above the stucco outlet 29. As the air is removed from the plenum 22 through the air outlet 150, the disengagement zone 160 provides space to allow the stucco powder particles to drop and fall back before possibly entering the air outlet 150, thereby preventing entrainment of the stucco powder particles in the air that exits through the air outlet 150.
- the air outlet 150 is typically in fluid communication with a dust collector (not shown), which collects and filters any stucco particle residue within the air. However, it has been found that the air outlet is not necessary, and sufficient cooling is achieved by allowing the steam to exit the plenum 22 through the stucco outlet 29.
- Performance requirements of a cooling system can also be met by using more than one cooling apparatus 20, either in parallel, or in series. A similar arrangement is described in U.S. Patent No. 6,138,377. Additionally, if further drying or cooling below 212°F, the stucco exiting the stucco outlet 29 can be fed to a drier, such as a fluid bed drier, familiar to one skilled in the art. Any drier that provides a flow of air without adding heat to the stucco may be considered for the drier.
- a drier such as a fluid bed drier, familiar to one skilled in the art. Any drier that provides a flow of air without adding heat to the stucco may be considered for the drier.
Abstract
Description
Claims
Priority Applications (14)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA2569340A CA2569340C (en) | 2004-07-15 | 2005-05-19 | Apparatus and process for cooling and de-steaming calcined stucco |
ES05752231T ES2393400T3 (en) | 2004-07-15 | 2005-05-19 | Apparatus and process for cooling and devaporization of calcined stucco |
EP05752231A EP1766308B1 (en) | 2004-07-15 | 2005-05-19 | Apparatus and process for cooling and de-steaming calcined stucco |
CN2005800231946A CN101119923B (en) | 2004-07-15 | 2005-05-19 | Apparatus and process for cooling and de-steaming calcined stucco |
NZ551779A NZ551779A (en) | 2004-07-15 | 2005-05-19 | Apparatus and process for cooling and de-steaming calcined stucco |
KR1020077003587A KR101184578B1 (en) | 2004-07-15 | 2005-05-19 | Apparatus and process for cooling and de-steaming calcined stucco |
BRPI0513325A BRPI0513325B1 (en) | 2004-07-15 | 2005-05-19 | apparatus for cooling and devaporization of hot and vapor calcined stucco powder and method of cooling and devaporization of hot and vapor calcined stucco powder |
AU2005273002A AU2005273002B2 (en) | 2004-07-15 | 2005-05-19 | Apparatus and process for cooling and de-steaming calcined stucco |
JP2007521464A JP5011461B2 (en) | 2004-07-15 | 2005-05-19 | Apparatus and process for cooling and degassing fired stucco |
MX2007000081A MX2007000081A (en) | 2004-07-15 | 2005-05-19 | Apparatus and process for cooling and de-steaming calcined stucco. |
UAA200701579A UA91685C2 (en) | 2004-07-15 | 2005-05-19 | Apparatus (variants) and process for cooling and de-steaming hot evaporated calcined stucco |
PL05752231T PL1766308T3 (en) | 2004-07-15 | 2005-05-19 | Apparatus and process for cooling and de-steaming calcined stucco |
IL179810A IL179810A (en) | 2004-07-15 | 2006-12-04 | Apparatus and process for cooling and de-steaming calcined stucco |
NO20070376A NO20070376L (en) | 2004-07-15 | 2007-01-19 | Apparatus and method for cooling and evaporating calcined plaster. |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US10/891,964 US7765813B2 (en) | 2004-07-15 | 2004-07-15 | Apparatus and process for cooling and de-steaming calcined stucco |
US10/891,964 | 2004-07-15 |
Publications (3)
Publication Number | Publication Date |
---|---|
WO2006019456A2 true WO2006019456A2 (en) | 2006-02-23 |
WO2006019456A3 WO2006019456A3 (en) | 2007-10-18 |
WO2006019456A8 WO2006019456A8 (en) | 2008-02-14 |
Family
ID=35597980
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/US2005/017485 WO2006019456A2 (en) | 2004-07-15 | 2005-05-19 | Apparatus and process for cooling and de-steaming calcined stucco |
Country Status (22)
Country | Link |
---|---|
US (1) | US7765813B2 (en) |
EP (1) | EP1766308B1 (en) |
JP (1) | JP5011461B2 (en) |
KR (1) | KR101184578B1 (en) |
CN (1) | CN101119923B (en) |
AR (1) | AR049981A1 (en) |
AU (1) | AU2005273002B2 (en) |
BR (1) | BRPI0513325B1 (en) |
CA (1) | CA2569340C (en) |
ES (1) | ES2393400T3 (en) |
IL (1) | IL179810A (en) |
MX (1) | MX2007000081A (en) |
MY (1) | MY145486A (en) |
NO (1) | NO20070376L (en) |
NZ (1) | NZ551779A (en) |
PL (1) | PL1766308T3 (en) |
RU (1) | RU2377482C2 (en) |
SA (1) | SA05260212B1 (en) |
TW (1) | TW200607781A (en) |
UA (1) | UA91685C2 (en) |
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US8793897B2 (en) | 2010-08-11 | 2014-08-05 | Grenzebach Bsh Gmbh | Process and device for stabilising, cooling and dehumidifying gypsum plaster |
DE102010033988A1 (en) * | 2010-08-11 | 2012-02-16 | Grenzebach Bsh Gmbh | Method and device for stabilizing, cooling and dehumidifying stucco |
US10277097B2 (en) * | 2013-01-14 | 2019-04-30 | Intuitive Surgical Operations, Inc. | Motor assembly |
CN106145724B (en) * | 2015-04-14 | 2018-01-05 | 郑州三迪建筑科技有限公司 | A kind of blending transportation cooling device of gypsum machining production line |
CN108698925B (en) * | 2016-02-02 | 2021-06-15 | 吉野石膏株式会社 | Calcined gypsum treatment device and calcined gypsum treatment method |
CN110567291A (en) * | 2019-09-20 | 2019-12-13 | 华北电力科学研究院有限责任公司 | Steam distribution system of air cooling island |
CN110803876B (en) * | 2019-11-25 | 2020-09-18 | 江苏一夫科技股份有限公司 | II type anhydrous gypsum thermal coupling production device and method |
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