Two-stage countercurrent extraction device and method
A secondary extraction and extraction device technology, applied in the direction of countercurrent extraction, solvent extraction, separation methods, etc., can solve the problems of increasing enterprise costs, large steam consumption, waste of water resources, etc., to reduce enterprise costs, reduce extraction water consumption, The effect of reducing steam consumption
Active Publication Date: 2017-11-03
张国柱
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Problems solved by technology
[0002] The current device for extracting the reducing solution is a reducing solution single-stage extraction tower, which uses soft water as the extraction agent to extract the inorganic phase and the organic phase in the reducing solution. However, the water phase extracted from the single-stage extraction tower cannot be recycled. The process requires a large amount of extraction water, and the volume ratio of reducing solution to soft water is 1:0.9, which wastes water resources and also leads to large steam consumption in the subsequent inorganic phase evaporation process, which increases the cost of the enterprise
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[0020] The present invention will be further described below in conjunction with the accompanying drawings.
[0021] Such as figure 1 As shown, the reducing solution in the reducing solution storage tank 1 reaches the reducing solution cooler 10 for cooling through the reducing solution delivery pump 9, and the soft water in the soft water storage tank 2 reaches the soft water cooler 12 for cooling through the soft water delivery pump 11, and the cooled reducing solution and soft water enter the primary mixer 3 through the reducing liquid flow control valve group 19 and the soft water flow control valve group 20 respectively for primary mixing, and the primary mixed liquid enters the primary extraction tank 5 for phase-separated extraction, and the primary extraction water is extracted from the top of the tank The phase enters the inorganic phase storage tank 7 for storage, and the primary extraction oil phase extracted from the bottom of the tank enters the primary extraction...
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The invention relates to a secondary counter-current extraction device and method, belongs to the technical field of secondary counter-current extraction of a reducing solution and provides a secondary counter-current extraction device and method which are capable of reducing extraction water consumption and reducing steam consumption. The device comprises a reducing solution storage tank, a soft water storage tank, a primary mixer, a secondary mixer, a primary extraction tank, a secondary extraction tank, an inorganic phase storage tank, an organic phase storage tank and the like, wherein the reducing solution and soft water after cooling are subjected to primary mixing with a secondary extraction water phase through the primary mixer, a primary mixed liquid enters the primary extraction tank for split-phase extraction, a primary extraction water phase extracted from the tank top enters the inorganic phase storage tank, a primary extraction oil phase extracted from the tank bottom is subjected to secondary mixing with the cooled soft water through the secondary mixer, a secondary mixed liquid enters the secondary extraction tank for split-phase extraction, a secondary extraction water phase extracted from the tank top enters the primary mixer, and a secondary extraction oil phase extracted from the tank bottom enters the organic phase storage tank. The secondary counter-current extraction device and method are mainly applied to the liquid extraction.
Description
technical field [0001] The invention relates to a two-stage countercurrent extraction device and method, and belongs to the technical field of two-stage countercurrent extraction of reducing liquid. Background technique [0002] The current device for extracting the reducing solution is a reducing solution single-stage extraction tower, which uses soft water as the extraction agent to extract the inorganic phase and the organic phase in the reducing solution. However, the water phase extracted from the single-stage extraction tower cannot be recycled. The process requires a large amount of extraction water, and the volume ratio of reducing solution to soft water is 1:0.9, which wastes water resources and also leads to large steam consumption in the subsequent inorganic phase evaporation process, which increases the cost of the enterprise. Therefore, it is necessary to improve the prior art. Contents of the invention [0003] In order to overcome the deficiencies in the pr...
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IPC IPC(8): B01D11/04
CPCB01D11/04B01D2011/002
Inventor 原俊武乔亚芬
Owner 张国柱