Zinc oxide desulphurization system
A desulfurization system and zinc oxide technology, applied in the fields of zinc sulfate, chemical instruments and methods, dispersed particle separation, etc., can solve the problems of zinc oxide desulfurization process without demonstration project, difficult to control oxidation efficiency, poor operating environment, etc. Pipe and equipment blockage and scaling problems, reducing equipment blockage and scaling problems, and saving raw material costs
A desulfurization system and zinc oxide technology, applied in the fields of zinc sulfate, chemical instruments and methods, dispersed particle separation, etc., can solve the problems of zinc oxide desulfurization process without demonstration project, difficult to control oxidation efficiency, poor operating environment, etc. Pipe and equipment blockage and scaling problems, reducing equipment blockage and scaling problems, and saving raw material costs
CN102389705AActive Publication Date: 2012-03-28CHINA ENFI ENGINEERING CORPORATION
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[0030] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.
[0031] In describing the present invention, it is to be understood that the terms "upper", "lower", "left", "right", "top", "bottom", "inner", "outer" etc. indicate an orientation or position The relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientati...
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The invention discloses a zinc oxide desulphurization system comprising an absorption tower, a settling tank, a slurrying tank, an acidifying tank and a sulfur dioxide desorption tower, wherein the absorption tower is provided with an air inlet, an air outlet, an absorption liquid inlet and an absorption liquid outlet; the settling tank is communicated with the absorption liquid outlet; the slurrying tank is communicated with the settling tank, so that absorbent and supernatant liquor are sent to the absorption tower after being stirred; the acidifying tank is connected with a solid-contained slurry outlet of the settling tank; and the sulfur dioxide desorption tower is connected with the acidifying tank. According to the zinc oxide desulphurization system, by the control on the solid content and the pH value of the absorption liquid in the absorption tower, the problems of equipment blockage and scaling are obviously reduced and the absorption efficiency of SO2 is not influenced. In addition, without the discharge of any waste gas, waste liquid and waste solid, fully-closed operation is achieved. The equipment is simple, the operation and the maintenance are convenient and the cost is low; and compared with the traditional zinc oxide desulphurization, the zinc oxide desulphurization of the invention is short in process, convenient to operate and capable of realizing continuous operation.
Description
technical field [0001] The invention relates to a zinc oxide desulfurization process, in particular to a zinc oxide desulfurization system. Background technique [0002] The traditional zinc oxide desulfurization process is as follows: a slurry containing zinc oxide (ZnO) or pure ZnO mixed with water and sulfur dioxide (SO 2 ) flue gas contacts, reacts, and generates zinc sulfite (ZnSO 3 ), ZnSO 3 After the precipitate is filtered by the filter press, the formed filter residue is sent to the roasting workshop; there are also ZnSO 3 In the case of oxidizing air blowing, the oxidation reaction occurs, and ZnSO is finally generated 4 , containing ZnSO 4 , ZnSO 3 , ZnO and the mixed solution of impurities, after being filtered by a filter press, the filtrate contains a large amount of ZnSO 4 , is sent to the leaching section of the wet system. After the filter residue is dried, it is sent to the slag treatment system or roasting section of the zinc smelter. [0003] The ...
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Patent Timeline
28 Mar 2012
Publication
CN102389705A
- IPC
- B01D53/80; B01D53/50; C01G9/06
- Inventors
- 魏甲明