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High-efficiency synthetic desulphurization technique without waste liquid

A desulfurization process, waste liquid technology, applied in the separation of dispersed particles, chemical instruments and methods, separation methods, etc., can solve the problems of poor dry effect, sewage discharge, energy consumption and water consumption, etc.

Inactive Publication Date: 2009-05-27
刘荣甫
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problems of poor dry effect in the current flue gas desulfurization process, high energy consumption, high water consumption and sewage discharge in the wet process, the present invention provides a new high-efficiency and waste-free comprehensive desulfurization process, which can not only reach or exceed the wet process The effect of legal treatment, and can simplify the process, save energy and cooling water, avoid equipment corrosion and less or no sewage discharge

Method used

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  • High-efficiency synthetic desulphurization technique without waste liquid
  • High-efficiency synthetic desulphurization technique without waste liquid
  • High-efficiency synthetic desulphurization technique without waste liquid

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Embodiment Construction

[0016] In the figure 1. The initial sulfur-containing flue gas to be treated, 2. Induced fan, 3. Spray drying and desulfurization and dust removal integrated machine, 4. Collection bag, 5. Intermediate flue gas, 6. Alkaline liquid, 7. Centrifugal fog 8. Intermediate flue gas inlet, 9. Wet spray tower, 10. Liquid storage tank, 11. Liquid level control float valve, 12 nozzle, 13 outlet, 14 gas heat exchanger, 15 pump, 16 purify flue gas exit.

[0017] In the embodiment shown in the figure, the sulfur-containing high-temperature waste heat gas (1) is pressurized by the induced draft fan (2) and enters the integrated equipment (3) for spray drying and dust removal, and runs upward in a rotating manner from the middle and lower parts, and the lye (6) Enter the integrated evaporation equipment (3) from the top, flow into a rotating disk (7) shaped like a plate, and scatter downward in the form of mist, and the SO in the treated initial sulfur-containing flue gas (1) 2 A chemical re...

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Abstract

A main spray device of a wet process is combined with a main part of spray drying equipment for dry desulfurization, and the dry process and the wet process are used in tandem, thus avoiding a cooling system and a heating system of flue gas, and a complex sewage treatment system. The flue gas first passes through a dry-process spray device for desulfurization and then passes through a wet-process spray device for secondary desulfurization, thus achieving the purpose that the desulfurization effect is better than that of the dry process and the wet process. Alkali liquor is only recycled in operation; finally, the liquid is dried by the heat of high-temperature flue gas to become solid powder which is collected then, thus the purpose of no effluent discharge is achieved and the consumed alkali liquor is automatically refilled.

Description

Technical field [0001] The invention relates to a liquid comprehensive desulfurization process with high efficiency and no waste discharge, which is especially suitable for flue gas desulfurization of coal-fired boilers. Background technique [0002] At present, the desulfurization process is mainly divided into two types: dry method and wet method. The advantages of dry desulfurization are simple equipment, less investment, small footprint and low operating cost, no waste liquid discharge, no need to reheat flue gas, etc. The disadvantage is desulfurization The efficiency is low, and the desulfurization effect is poor, but the efficiency is crucial, and its development is limited because it cannot meet the environmental protection requirements. The wet desulfurization effect is good, and the flue gas is generally washed with alkaline liquid as the absorbent, SO 2 Such as acid gas and alkaline liquid chemically react to form salts, so as to achieve the removal of SO 2 The ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/75B01D53/50
Inventor 刘荣甫
Owner 刘荣甫
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