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System device and method for deeply removing nitric oxide in industrial tail gas

A technology for nitrogen oxides and industrial tail gas, applied in chemical instruments and methods, separation methods, dispersed particle separation, etc., can solve the problems of small equipment size, high operating cost, poor mass transfer effect, etc. Denitrification effect, easy operation effect

Active Publication Date: 2015-05-06
BEIJING UNIV OF CHEM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, most of the traditional denitrification devices are large-scale tower equipment, which has problems such as large equipment, high operating costs, and poor mass transfer effect.

Method used

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  • System device and method for deeply removing nitric oxide in industrial tail gas
  • System device and method for deeply removing nitric oxide in industrial tail gas

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] see figure 1 As shown, a system device for deep removal of nitrogen oxides in industrial tail gas includes an absorption tower 100, a first absorption liquid storage tank 101, a first delivery pump 102, a first regulating valve 103, a gas distribution tank 104, and a gas distribution tank 104. Valve 105, air distribution fan 106, supergravity rotating bed, liquid recovery tank 107, third delivery pump 109, third regulating valve 108, second absorption liquid storage tank 110, second delivery pump 111 and second regulating valve 112; The lower part of the absorption tower 100 is connected to the first absorption liquid storage tank 101 through a pipeline, and the first absorption liquid storage tank 101 is connected to the upper part of the absorption tower 100 through the first delivery pump 102 and the first regulating valve 103 in sequence. The spray head 1001 is connected and communicated; the gas outlet of the absorption tower 100 is connected and communicated with ...

Embodiment 2

[0045] see figure 2 As shown, a system device for deep removal of nitrogen oxides in industrial tail gas includes a first-stage high-gravity rotating bed 200, a first absorption liquid storage tank 210, a first delivery pump 220, a first liquid inlet regulating valve 230, The first gas distribution device 240, the second stage high-gravity rotating bed 300, the second absorption liquid storage tank 310, the second delivery pump 320, the second liquid inlet regulating valve 330 and the second gas distribution device 340; the first stage The liquid outlet 202 of the high-gravity rotating bed 200 is connected to the first absorption liquid storage tank 210 through a pipeline, and the first absorption liquid storage tank 210 is connected to the first stage through the first delivery pump 220 and the first liquid inlet regulating valve 230 in sequence. The liquid inlet 201 of the high-gravity rotating bed 200 is connected and connected, and the first gas distribution device 240 is...

Embodiment 3

[0049] Utilize the system device of above-mentioned embodiment 1 to carry out the method for deep removal of nitrogen oxides in industrial tail gas, comprise the steps:

[0050] 1) Input the industrial tail gas containing nitrogen oxides into the bottom of the absorption tower 100;

[0051] 2) The spray head 1001 at the top of the absorption tower 100 sprays out the absorption liquid to absorb the nitrogen oxides in the tail gas, and the gas absorbed by the absorption liquid is discharged from the top of the absorption tower into the gas distribution tank 104, and the oxidizing gas in the gas distribution tank 104 After the gas undergoes an oxidation reaction, it enters the supergravity rotating bed from the gas inlet 113 for deep removal of nitrogen oxides; the absorption liquid in the absorption tower after spraying enters the first absorption liquid storage tank 101, and then passes through the first conveying The pump 102 and the first regulating valve 103 are sent to the ...

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Abstract

The invention discloses a system device for deeply removing nitric oxide in industrial tail gas. The device is characterized by comprising two-stage serial connected equipment, wherein the two-stage serial connected equipment is formed by serial connection of an absorption tower and a single rotating packed bed or the serial connection of two rotating packed beds. The invention also discloses a method for removing by utilizing the device. The device and the method enable the nitric oxide emission to be lower 200mg / m<3> required by the national nitric oxide emission standard and are particularly suitable for upgrading and reconstructing factories with limited space; the removing rate of NO gas in the industrial tail gas can be effectively improved by a method for increasing the oxidation degree from the aspects of vapor phase and liquid phase; an optimal denitration effect can be achieved by using different combinations of absorbents according to different technical requirements; and the environmental pollution prevention and control of China can be greatly pushed and promoted by deep denitration of the two-stage serial connected equipment.

Description

technical field [0001] The invention relates to a treatment device and method for industrial tail gas, in particular to a system device and method for deep removal of nitrogen oxides in industrial tail gas; the device increases the oxidation of nitrogen oxides in tail gas from both the gas phase and the liquid phase Therefore, it is suitable for the removal of nitrogen oxide tail gas with a low degree of oxidation. Background technique [0002] Due to the increase in coal combustion and the rapid increase in the number of motor vehicles, the total emission of nitrogen oxides in my country has increased year by year. NO and NO in nitrogen oxides 2 It will damage the human respiratory system and cause poisoning. At the same time, nitrogen oxides can form nitric acid-type acid rain and acid mist, which can combine with hydrocarbons to form photochemical smog, destroy the ozone layer, and bring great harm to humans and nature. Currently existing flue gas denitrification techn...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01D53/78B01D53/56
Inventor 初广文桑乐陈建峰罗勇邹海魁赵宏
Owner BEIJING UNIV OF CHEM TECH
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