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

A desulfurization, denitrification, and flue gas technology, applied in the field of flue gas purification, can solve the problems of inability to realize desulfurization and denitrification reactions and process conditions, ineffective removal of dioxins, and ineffective use of heat, and reduce investment. and operating costs, reducing equipment and operating investment, and reducing 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 synchronously in the same reactor, which cannot achieve optimal reaction and process conditions for both desulfurization and denitrification ;
[0008] 3) During the desulfurization and denitrification process using traditional electron beam irradiation, the dioxins produced in the boiler flue gas have not been effectively removed

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

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Embodiment 1

[0057] see figure 2 , the present invention processes the flue gas through a flue gas treatment tower and an irradiation reactor respectively. The temperature of the flue gas produced by boiler 1 is 130°C, and the SO in the flue gas x The content is 300ppm, and the NOx content is 200ppm.

[0058] figure 2 The components and connections of the electron beam flue gas desulfurization and denitrification device shown are as follows:

[0059] The boiler 1 is connected to the flue gas treatment tower 3 through the first flue 2;

[0060] A flue gas treatment tower 3, a spray system 4 is installed on the flue gas treatment tower 3; the flue gas outlet of the flue gas treatment tower 3 is connected to the irradiation reactor 7 with a second flue 5, and the second flue 5 An ammonia injection control valve 6 is arranged on the top; an electron accelerator 8 is installed on the irradiation reactor 7, and an ultraviolet generator 9 is installed on the side wall of the irradiation rea...

Embodiment 2

[0067] see Figure 4 , the present invention processes the flue gas through a flue gas treatment tower and an irradiation reactor respectively. The flue gas temperature produced by boiler 1 is 150°C, the SOx content in the flue gas is 280ppm, and the NOx content is 200ppm.

[0068] Figure 4 The components and connections of the flue gas desulfurization and denitrification device shown are as follows:

[0069] The boiler 1 is connected to the flue gas treatment tower 3 through the first flue 2; the flue gas treatment tower 3 is equipped with a spray system 4; the flue gas outlet of the flue gas treatment tower 3 passes through the second The flue 5 is connected to the inlet end of the irradiation reactor 7; the second flue 5 is provided with an ammonia injection control valve 6; the outlet end of the irradiation reactor 7 is connected to the first by-product collector 11; An electron accelerator 8 is installed above the irradiation reactor 7, an ultraviolet generator 9 is i...

Embodiment 3

[0075] see Figure 5, the present invention processes the flue gas through a flue gas treatment tower and an irradiation reactor respectively. The flue gas temperature produced by boiler 1 is 150°C, the SOx content in the flue gas is 280ppm, and the NOx content is 200ppm.

[0076] Figure 5 The components and connections of the shown flue gas desulfurization and denitrification device are similar to those in Example 2, specifically as follows:

[0077] The boiler 1 is connected to the flue gas treatment tower 3 through the first flue 2; the flue gas treatment tower 3 is equipped with a spray system 4; the flue gas outlet of the flue gas treatment tower 3 passes through the second The flue 5 is connected to the inlet of the irradiation reactor 7; the second flue 5 is provided with an ammonia injection control valve 6; the outlet of the irradiation reactor 7 is connected to the first by-product collector 11.

[0078] The ultraviolet generator in the irradiation reactor 7 is a...

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Abstract

The invention discloses an electron beam flue gas desulfurization and denitrification method comprising the following steps of (1) carrying out spray treatment on flue gas generated by a boiler or a gas turbine by using water to cool the flue gas; and (2) mixing the cooled flue gas and ammonia gas, and then, carrying out ultraviolet irradiation and electron beam irradiation to realize desulfurization and denitrification. The method disclosed by the invention can be used for simultaneously carrying out desulfurization and denitrification reaction, so that the process flow is simplified, and the equipment and operation investments are reduced. An ultraviolet generator is relatively cheap and available, so that the power requirement of an electron beam generation device can be further reduced by additionally arranging the ultraviolet generator in an irradiation reactor, and furthermore, the investment and operation costs of the electron beam generation device can be remarkably reduced. The invention also discloses a 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): B01D53/76B01D53/79B01D53/60B01D53/72
Inventor 曹留烜肖飞龙张彬彬王夺李宁刘运权张尧立赵英汝
Owner XIAMEN UNIV
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