Method for desulfurizing and denitrifying flue gas

A flue gas and denitrification technology, applied in the field of flue gas desulfurization and denitrification, can solve the problems of complex system, low sulfur removal efficiency, high equipment investment and operation and maintenance costs, and achieve good economic benefits and simple overall process

Inactive Publication Date: 2011-06-01
姜玉贵
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Problems solved by technology

Therefore, the research on flue gas desulfurization and denitrification technology has been widely carried out in the world. Among them, the dry process has the advantages of less investment, simple equipment and easy product handling, but the dry process also has low utilization rate of absorbents and the limit

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  • Method for desulfurizing and denitrifying flue gas
  • Method for desulfurizing and denitrifying flue gas

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[0013] Now refer to the attached figure 1 , Combined with the examples, the description is as follows: The flue gas desulfurization and denitrification method of the present invention mainly uses H 2 O 2 Absorb SO in flue gas 2 , N X O X , Using the temperature in the waste gas to heat and separate H 2 SO 4 And HNO 3 , Including boiler flue 1, HNO 3 Storage tank 2, cooling device A3, heating separator A4, absorption tower 5, chimney 6, cooling device B7, heating separator B8, pump 9, H 2 O 2 Storage tank 10, cooling device C11 and H 2 SO 4 The storage tank 12 is composed. The invention uses hydrogen peroxide to absorb SO in the flue gas 2 And N X O X , Can extract H 2 SO 4 And industrial HNO 3 , Make the flue gas reach the emission standard, the reaction formula is:

[0014] SO 2 +H 2 O 2 ===H 2 SO 4

[0015] 2NO 2 +H 2 O 2 ===2HNO 3

[0016] 2NO 2 +3H 2 O 2 ===2HNO 3 +2H 2 O

[0017] N 2 O+4H 2 O 2 ===2HNO 3 +3H 2 O

[0018] N 2 O 4 +H 2 O 2 ===2HNO 3

[0019] The specific process f...

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Abstract

The invention discloses a method for desulfurizing and denitrifying flue gas, which is mainly to absorb SO2 and NXOX in the flue gas by utilizing H2O2 and separate H2SO4 and HNO3 by utilizing the temperature in waste flue gas to heat, and is implemented by a device consisting of a boiler discharge flue, a HNO3 storage tank, a cooling device, a heating separator, an absorption column, a chimney, a pump, a H2O2 storage tank and a H2SO4 storage tank. Burt gas of a boiler is conveyed to the heating separator through a conveying pipeline, and the heating separator conveys one part of the burnt gas which is then conveyed to the HNO3 storage tank to the cooling device through a conveying pipeline. The heating separator is also connected to the absorption column, and the absorption column is also connected to the chimney. The absorption column is connected to the H2O2 storage tank and the heating separator through a pipeline and the pump, and the heating separator is connected to the H2O2 storage tank through a pipeline and the cooling device. The heating separator is also connected to the H2SO4 storage tank through a pipeline and the cooling device. In the method, the integral process is simple, the desulfurization and denitrification are synchronously performed, and particularly the economic benefit in a treatment process is high.

Description

technical field [0001] The invention relates to a flue gas dedusting method, in particular to a flue gas desulfurization and denitrification method. Background technique [0002] During the utilization of heat energy, smoke and dust will pollute the environment and the atmosphere, especially the sulfur and nitrogen in the smoke and dust will pollute the atmosphere, and the damage to the environment is serious. Therefore, the research on flue gas desulfurization and denitrification technology has been widely carried out in the world. Among them, the dry process has the advantages of less investment, simple equipment and easy handling of products, but the dry process also has low utilization rate of absorbents and the limitation of sulfur. The removal efficiency is low, and the shortcomings of not being able to remove nitrogen at the same time. In the prior art, the flue gas desulfurization and denitrification are generally complex systems, and the equipment investment and op...

Claims

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Application Information

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IPC IPC(8): B01D53/78B01D53/60
CPCY02A50/20
Inventor 彭兴海姜超姜玉贵徐道之孔光王国栋朱红卫冯鹏飞王洪轩王伟刘文江凌信东杨子祥徐玉学
Owner 姜玉贵
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