Flue gas desulfurization and denitrification device and method of coal fired boiler

A coal-fired boiler, desulfurization and denitrification technology, applied in separation methods, chemical instruments and methods, air quality improvement, etc., can solve the problems of complex process, large investment, unstable effect, etc.

Inactive Publication Date: 2015-09-16
威海恒邦化工有限公司
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Problems solved by technology

[0003] After retrieval, the current flue gas desulfurization is divided according to the types of desulfurizers, mainly including the calcium method based on limestone and quicklime; the magnesium method based on magnesium oxide; the sodium method based on sodium sulfite and sodium hydroxide; the synthetic ammonia method. The basic ammonia method; the above desulfurization methods all have different degrees of shortcomings, mainly because the process is complicated, the investment is large, the effect is unstable, and the secondary waste is difficult to deal with

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  • Flue gas desulfurization and denitrification device and method of coal fired boiler

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Embodiment Construction

[0008] For better illustration and implementation, the present invention will be described in detail below in conjunction with flow charts and specific examples.

[0009] One set of three-waste mixed-combustion boiler, the combustion components are synthetic ammonia gas blowing gas, ammonia storage tank discharge gas and air release, gas-making slag, coal and other mixed combustion, the boiler evaporation capacity is 35 tons / h, and the flue gas after boiler combustion is 55000Nm 3 / h, containing sulfur dioxide 530mg / Nm 3 , nitrogen oxides 260mg / Nm 3 After being dedusted by the post-furnace dust collector, cooled by the economizer, and dedusted by the electrostatic precipitator, the flue gas temperature is 120°C, first enters the pre-cooler 1, and sprays the cooling liquid through the branch a of the circulation pipeline to cool down to 70°C, and then the flue gas The gas enters the absorber 2, and after the circulating absorption liquid sprayed by the circulating pump 3 absor...

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Abstract

The invention discloses a flue gas desulfurization and denitrification device and method of a coal fired boiler, and relates to desulfurization and denitrification treatment of tail gas of a three-waste mixed fired boiler in the coal-to-gas industry, such as synthesized ammonia and methyl alcohol. The device is arranged behind an electric precipitator of a three-waste mixed fired boiler, and mainly comprises a precooler, a desulfurizer, a circulation pump, a hydrogen peroxide storage tank, an absorption liquid supplementing pump, a dilute sulphuric acid storage tank and the like; sulfur dioxide and nitric oxide in the tail gas are removed by utilizing the circulation absorption of a hydrogen peroxide solution in the desulfurizer with flue gas, and the generated dilute sulphuric acid is stored and sold.

Description

technical field [0001] The invention relates to the desulfurization and destocking treatment of the tail gas of the three-waste co-combustion furnace in the coal gas industry such as synthetic ammonia and methanol. The device is installed behind the electrostatic precipitator of the three-waste mixed-fired boiler, and mainly includes a pre-cooler, desulfurizer, circulation pump, hydrogen peroxide storage tank, absorption liquid replenishment pump, dilute sulfuric acid storage tank, etc. Gas circulation absorption, removal of sulfur dioxide and nitrogen oxides in the tail gas, and the generated dilute sulfuric acid is stored for sale. After flue gas desulfurization, the sulfur dioxide in the flue gas can be reduced to below 20mg / Nm3, and the nitrogen oxides can be reduced to 100mg / Nm 3 the following. Background technique [0002] my country's coal-based energy structure is one of the main factors affecting the quality of my country's atmospheric environment. 90% of sulfur d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/78B01D53/60
CPCY02A50/20
Inventor 曹辉陈思涛王磊赵伟
Owner 威海恒邦化工有限公司
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