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公开(公告)号：US3698556A
公开(公告)日：1972-10-17
申请号：US3698556D
申请日：1970-10-30
Applicant: ENVIROTECH CORP
Inventor： EMMETT ROBERT C JR , DAHLSTROM DONALD A , BROZOVICH JOHN C
CPC classification number: B01D33/06 , B01D33/09 , B01D33/64 , B01D33/809
Abstract: Apparatus is disclosed for steam drying filter cake formed on a drum or disc vacuum filter mounted for rotation in a container the lower portion of which comprises a feed slurry tank and the upper portion comprises a steam hood or steam dome. Means are provided to control the distribution of steam to the dome; to provide releasable seals for the rotary filter; to provide an improved steam hood; to provide exhaust means for the device and to provide an air cooler for the formed and heated filter cake.
Abstract translation: 公开了用于蒸汽干燥滤饼的装置，该滤饼形成在滚筒或盘式真空过滤器上，该滤筒安装为用于在容器中旋转，其中下部包括进料浆料槽，上部包括蒸汽罩或蒸汽穹顶。 提供装置以控制蒸汽到圆顶的分布; 以提供用于旋转过滤器的可释放密封件; 提供改进的蒸汽罩; 为装置提供排气装置，并为形成和加热的滤饼提供空气冷却器。
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公开(公告)号：US3672067A
公开(公告)日：1972-06-27
申请号：US3672067D
申请日：1970-10-30
Applicant: ENVIROTECH CORP
Inventor： EMMETT ROBERT C JR , DAHLSTROM DONALD A
IPC: B01D33/23 , B01D35/143 , F26B5/04
CPC classification number: B01D35/143 , B01D33/23 , B01D33/663 , B01D33/801 , B01D33/809 , B01D2201/282
Abstract: A method is disclosed for steam drying filter cake on a drum or disc type vacuum filter having a steam drying cycle wherein optimum cake thickness and moisture content is obtained at optimum thermal efficiency by controlling steam condensation within the cake at constant steam input, through control of the vacuum on the filter during cake formation and during filter cake drying with generally constant speed of rotation of the filter element.
Abstract translation: 公开了一种在具有蒸汽干燥循环的滚筒或盘式真空过滤器上的蒸汽干燥滤饼的方法，其中通过控制在恒定蒸汽输入下的滤饼内的蒸汽冷凝，通过控制蒸汽干燥循环，在最佳热效率下获得最佳的滤饼厚度和水分含量 在滤饼形成期间和滤饼干燥期间过滤器上的真空大体上恒定的过滤元件的旋转速度。
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公开(公告)号：US3873532A
公开(公告)日：1975-03-25
申请号：US35326073
申请日：1973-04-23
Applicant: ENVIROTECH CORP
Inventor： DAHLSTROM DONALD A , CORNELL CONRAD F
CPC classification number: C01B17/60 , B01D53/501 , C02F1/66 , C02F2103/18
Abstract: Sulfur dioxide is scrubbed from stack gases in an absorption device by a sodium-based aqueous scrubbing solution, a portion of which is subsequently and continuously regenerated outside the absorption apparatus by a causticizing reaction with slaked lime. The causticized solution is routed through a settling device wherefrom a portion of the aqueous sediment is returned to the causticizing zone to provide seed crystals which encourage the formation of larger sized solid particles; also, a portion of the aqueous sediment from the settling device is continuously mechanically dewatered and then removed from the system. The liquid effluent solution from the settling device is passed to a solids-contacting and reaction device for mixing with sodium carbonate in order to reduce the calcium ion concentration and the solids content of the solution. The underflow of the solidscontacting device is conveyed back to the causticizing zone and the clarified overflow, i.e., the regenerated scrubbing liquor, is conveyed to the absorption apparatus.
Abstract translation: 二氧化硫通过钠基水性洗涤溶液在吸收装置中从堆叠气体中洗涤，其一部分随后并通过与熟石灰的苛化反应在吸收装置外连续再生。 苛化溶液通过沉淀装置，其中一部分沉淀物返回到苛化区，以提供促进形成较大尺寸固体颗粒的晶种; 此外，来自沉降装置的一部分沉淀物连续机械脱水，然后从系统中除去。 来自沉降装置的液体流出物溶液被传递到与碳酸钠混合的固体接触和反应装置，以便降低溶液的钙离子浓度和固体含量。 固体接触装置的下溢被输送回苛化区，澄清的溢流，即再生的洗涤液被输送到吸收装置。
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公开(公告)号：US3592341A
公开(公告)日：1971-07-13
申请号：US3592341D
申请日：1970-01-05
Applicant: ENVIROTECH CORP
Inventor： EMMETT ROBERT C JR , DAHLSTROM DONALD A
CPC classification number: B01D33/21 , B01D33/466 , B01D33/663 , B01D33/68 , B01D33/76 , B01D33/807 , B01D35/18 , B01D35/30 , B01D2201/38
Abstract: A method and apparatus is disclosed for steam-drying filter cake formed on a drum on disc-type vacuum filter which is mounted for rotation in an enclosed feed slurry tank. To block heat loss and subsequent condensation of the steam within the enclosed area, an insulating barrier is floated on the feed slurry to maintain a thermal separation therebetween.
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