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Integrated purification system for complex flue gas

A purification system and flue gas technology, applied in air quality improvement, chemical instruments and methods, separation of dispersed particles, etc., can solve the problem of high oxidation cost, achieve high absorption efficiency, reduce mass transfer distance, and low energy consumption

Inactive Publication Date: 2021-03-05
DALIAN MARITIME UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem of high oxidation cost in the oxidation-washing purification process, the present invention provides a SO x with NO x The integrated purification process system is a flue gas catalytic oxidation-washing absorption purification system with simple process, low purification cost and simultaneous desulfurization and denitrification

Method used

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  • Integrated purification system for complex flue gas
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Examples

Experimental program
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Effect test

Embodiment 1

[0037] An integrated complex flue gas purification system, the system is composed of a catalytic oxidation device 5 and an absorption and washing device, the absorption and washing device includes a washing tower 17, and at least two stages of spray washing are arranged in the washing tower in sequence from bottom to top In this embodiment, four-stage spray scrubbers are set, which are respectively the first-stage scrubber shower 13, the second-stage scrubber shower 14, the third-stage scrubber shower 15, the fourth-stage scrubber shower 16, and the cleaner , dedusting and mist eliminator 11 and chimney 10; the bottom of the washing tower is provided with a flue gas inlet 6, and the spray scrubber is arranged above the flue gas inlet, and the flue gas inlet is connected with the catalytic oxidation device; the spray washing The device is composed of circulating spray pump A8, nozzle 18 and microchannel filler 19. The spray pump transports the washing liquid composed of process ...

Embodiment 2

[0051] In addition to adding process gas 4 to contain O 3 air, where O 3 The mol ratio with NO is 0.2, and all the other processes and parameters are the same as in Example 1.

[0052] The SOx removal rate of the system is greater than 99%, and the NOx removal rate is greater than 90%.

[0053] The desulfurization, denitrification and dedusting process in the present invention is implemented based on the above-mentioned equipment, so this process also has the technical effect of the above-mentioned equipment. In short, according to the flue gas purification system of the embodiment of the present invention, the flue gas in the flue gas source first enters the catalytic oxidation device 5, and the insoluble NO in the flue gas is oxidized into water-soluble NO 2 , the oxidized flue gas enters the washing tower 7 and reacts with the washing liquid in the washing tower to realize the synchronous removal of NOx and SOx in the flue gas. Smaller and more environmentally friendly. ...

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Abstract

The invention discloses an integrated purification system for complex flue gas, which greatly improves the purification efficiency of the complex flue gas and realizes efficient comprehensive treatment of smoke dust, sulfur oxide and nitrogen oxide. The integrated purification system for complex flue gas is mainly composed of a catalytic oxidation device and an absorption washing device. Accordingto the invention, firstly, a flue gas source is oxidized by a catalyst in the catalytic oxidation device, and then the flue gas source is introduced into the absorption washing device, intensively sprayed and washed by a circulating washing liquid in multiple stages, and finally discharged into the atmosphere by a dust and mist removal device. The system can realize the integration of dust removal, desulfurization and denitration, the energy consumption of the purification system can be greatly reduced, and the system is suitable for the comprehensive treatment process of various complex fluegases such as industrial tail gas and ship engine tail gas, in particular to the removal process of nitrogen oxide and sulfur oxide with the temperature being lower than 350 DEG C and the sulfur content being lower than 700ppm.

Description

technical field [0001] The invention relates to a process system for integrated removal of smoke dust, sulfur oxides and nitrogen oxides by a catalytic oxidation-absorption method, belonging to the fields of ship anti-pollution technology, industrial tail gas purification technology and selective catalysis. Background technique [0002] At present, the problem of regional air pollution characterized by particulate matter and acid rain in my country is still severe, which not only damages the health of the people, but also seriously affects normal social production activities. Reasonable use of flue gas desulfurization, denitrification and dust removal technologies to ensure flue gas emission indicators Compliance is imperative. [0003] Commonly used flue gas desulfurization and dust removal technologies can be divided into three categories: wet method, dry method, and semi-dry method. The current desulfurization technology is mainly wet method. Among them, WGS wet scrubbing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/86B01D53/60
CPCB01D53/8637B01D2251/104B01D2251/102Y02A50/20
Inventor 孙天军李涛陶平汤立君赵宝刚孙玉清
Owner DALIAN MARITIME UNIVERSITY
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