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Smoke desulfurizing method by amino-thiamine method

A flue gas and ammonium sulfate technology, applied in the field of ammonia-ammonium sulfate flue gas desulfurization, can solve the problems of high ammonia consumption, difficult recovery of by-products, large flue gas resistance, etc., so as to improve reaction efficiency, improve utilization rate, and efficiently collect Effect

Inactive Publication Date: 2005-08-03
JIANGSU HEYICHANG ENVIRONMENTAL PROTECTION ENG & TECH
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Problems solved by technology

[0002] At present, the ammonia desulfurization method used to remove sulfur dioxide from boiler flue gas is limited by structural form, manufacturing process, and anti-corrosion materials. Problems such as high ammonia consumption, large flue gas resistance, easy corrosion of equipment, and difficult recovery of by-products have not yet been resolved.

Method used

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  • Smoke desulfurizing method by amino-thiamine method
  • Smoke desulfurizing method by amino-thiamine method

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Embodiment Construction

[0043] Such as figure 1 As shown, the present invention includes a separated flue gas heat exchanger, an absorption reaction tower, a circulating liquid tank, a circulating pump, an oxidation tank, compressed air, pH adjustment, a filter, a neutralization tank, a slurry pump, a crystallization evaporator, and a centrifuge , Dryer, etc. Specific steps are as follows:

[0044] 1) Absorption: A flue gas desulfurization tower is installed between the boiler outlet and the chimney, and the desulfurization tower uses ammonia as a carrier to absorb SO in the flue gas of the coal-fired boiler. 2 absorbed to form ammonium sulfite (NH 4 ) 2 SO 3 ;

[0045] 2) Circulation: the absorption liquid in the desulfurization tower enters the circulation tank, and NH is added 3 , a part of the absorption liquid enters the oxidation tower or oxidation pool through the circulating pump, and the other part enters the desulfurization tower for recycling;

[0046] 3), adjust the pH value: add N...

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Abstract

The fume-desulfurizing ammonia-thiamine method is to use ammonia as carrier absorbing SO2 in coal burning fume as a kind resource. One fume desulfurizing tower is installed between the boiler exhaust and the chimney, and ammonium sulfite and ammonium bisulfite are produced through reaction and dissolved in circular solution. The solution is neutralized and forced to oxidize to produce ammonium sulfate, which is extracted in evaporating and crystallizing apparatus and is used as composite chemical fertilizer. Or, the ammonium sulfite may be synthesized in chemical plant into other different products.

Description

technical field [0001] The invention relates to an ammonia-ammonium sulfate flue gas desulfurization method, in particular to a method for removing sulfur dioxide from flue gas of a power plant boiler. Background technique [0002] At present, the ammonia desulfurization method used to remove sulfur dioxide from boiler flue gas is limited by structural form, manufacturing process, and anti-corrosion materials. Problems such as high ammonia consumption, large flue gas resistance, easy corrosion of equipment, and difficult recovery of by-products have not yet been resolved. . Contents of the invention [0003] The technical problem to be solved in the present invention is to overcome the defects of the prior art and provide an ammonia-ammonium sulfate flue gas desulfurization method, which has low investment, low operating cost, high desulfurization efficiency, strong operation reliability and high degree of automation , By-product resource utilization. [0004] In order t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/50B01D53/79
Inventor 王明祥刘新亚
Owner JIANGSU HEYICHANG ENVIRONMENTAL PROTECTION ENG & TECH
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