Flue gas desulfurization and denitrification method and device and application of flue gas desulfurization and denitrification device

A technology for desulfurization, denitrification, and flue gas, which is applied in the field of flue gas purification, can solve the problems of inability to realize desulfurization and denitrification reactions and process conditions, dioxins cannot be effectively removed, and heat cannot be effectively used, so as to reduce investment and operating costs, reduced power requirements, and the effect of reduced power requirements

Active Publication Date: 2015-04-01
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in the direction of irradiation, the efficiency of flue gas treatment decreases sharply;
[0007] 2) The flue gas produced by coal-fired boilers must first be sprayed with water to cool down, and the heat has not been effectively utilized; moreover, desulfurization and denitrification are processed synchronous

Method used

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  • Flue gas desulfurization and denitrification method and device and application of flue gas desulfurization and denitrification device
  • Flue gas desulfurization and denitrification method and device and application of flue gas desulfurization and denitrification device
  • Flue gas desulfurization and denitrification method and device and application of flue gas desulfurization and denitrification device

Examples

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Example Embodiment

[0062] Example 1

[0063] See figure 2 In the present invention, the flue gas is respectively passed through a flue gas treatment tower and an irradiation reactor for two-step treatment. The temperature of the flue gas produced by boiler 1 is 130℃, and the flue gas contains SO x The content is 300ppm, and the NOx content is 200ppm.

[0064] figure 2 The components and connections of the electron beam flue gas desulfurization and denitrification device shown are as follows:

[0065] The boiler flue gas inlet 31 of the flue gas-flue gas heat exchanger 3 is connected to the boiler 1 through the first flue 21;

[0066] The flue gas treatment tower 5 is equipped with a spray system 6; the boiler flue gas outlet 32 ​​of the flue gas-flue gas heat exchanger 3 and the flue gas inlet of the flue gas treatment tower 5 51 is connected by the second flue 22, the second flue 22 is provided with an ammonia injection control valve 4; the flue gas outlet 52 of the flue gas treatment tower 5 is con...

Example Embodiment

[0073] Example 2

[0074] See Figure 4 In the present invention, the flue gas is respectively passed through a flue gas treatment tower and an irradiation reactor for two-step treatment. The temperature of the flue gas produced by the boiler 1 is 150°C, the SOx content in the flue gas is 280 ppm, and the NOx content is 200 ppm.

[0075] Figure 4 The components and connections of the flue gas desulfurization and denitrification device shown are as follows:

[0076] The flue gas-flue gas heat exchanger 3, the boiler flue gas inlet 31 of the flue gas-flue gas heat exchanger 3 is connected to the boiler 1 through the first flue 21; the flue gas treatment tower 5, the flue gas treatment tower 5 is installed with a spray system 6; the boiler flue gas outlet 32 ​​of the flue gas-flue gas heat exchanger 3 and the flue gas inlet 51 of the flue gas treatment tower 5 are connected through the second flue 22, and the first flue gas The second flue 22 is provided with an ammonia injection con...

Example Embodiment

[0081] Example 3

[0082] See Figure 5 In the present invention, the flue gas is respectively passed through a flue gas treatment tower and an irradiation reactor for two-step treatment. The temperature of the flue gas produced by the boiler 1 is 150°C, the SOx content in the flue gas is 280 ppm, and the NOx content is 200 ppm.

[0083] Figure 5 The components and connections of the flue gas desulfurization and denitrification device shown are similar to those in Example 2, and the details are as follows:

[0084] The flue gas-flue gas heat exchanger 3, the boiler flue gas inlet 31 of the flue gas-flue gas heat exchanger 3 is connected to the boiler 1 through the first flue 21; the flue gas treatment tower 5, the flue gas treatment tower 5 is installed with a spray system 6; the boiler flue gas outlet 32 ​​of the flue gas-flue gas heat exchanger 3 and the flue gas inlet 51 of the flue gas treatment tower 5 are connected through the second flue 22, and the first flue gas The secon...

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Abstract

The invention discloses a flue gas desulfurization and denitrification method comprising the following steps of carrying out heat exchange between flue gas generated by a boiler or a gas turbine and flue gas which is desulfurized and denitrified for the first time to cool the flue gas generated by the boiler; mixing the cooled flue gas and ammonia gas, and then, carrying out spray treatment with water; then, carrying out heat exchange between the flue gas which is desulfurized and denitrified for the first time and flue gas generated by the boiler to heat the flue gas which is desulfurized and denitrified for the first time; and simultaneously carrying out ultraviolet irradiation and electron beam irradiation on the heated flue gas which is desulfurized and denitrified for the first time. By using the method and a device disclosed by the invention, the heat of the flue gas can be effectively utilized to realize the sufficient heat exchange between two kinds of flue gas; and the optimal SOx and NOx removal temperatures are respectively reached in the two treatment processes, so that the desulfurization and denitrification efficiencies can be remarkably increased. The invention also discloses the device applying the method and application of the device.

Description

technical field [0001] The invention relates to the field of flue gas purification, in particular to a method, device and application for treating flue gas desulfurization and denitrification by using electron beams and ultraviolet rays. Background technique [0002] Environmental pollution caused by air pollution seriously threatens human health. Among them, sulfur dioxide and nitrogen oxides emitted by large industrial facilities, including thermal power plants, cement plants, and waste incineration plants, are one of the main sources of air pollution. Therefore, the problem of flue gas desulfurization and denitrification in factories is an important task in the treatment of environmental pollutants. NO in the exhaust of various large diesel engines, marine engines, gas turbines, etc. x Higher content, reduce the NO in the exhaust of these combustion engines x Concentration has also been the focus of attention. In addition, thermal power plants, cement plants, waste in...

Claims

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Application Information

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IPC IPC(8): B01D53/75B01D53/60B01D53/70F23J15/02
CPCY02A50/20
Inventor 张彬彬王夺曹留烜李宁刘运权张尧立赵英汝
Owner XIAMEN UNIV
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