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Sintering flue gas integrated type oxidization and denitration device and application thereof

An integrated technology of sintering flue gas, applied in the field of environmental engineering, can solve the problems of SCR catalyst life impact, great difference, gypsum rain pollution, etc., to shorten the length of pipeline transportation, occupy a small area, and increase turbulent mixing Effect

Inactive Publication Date: 2015-01-28
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the flue gas from steel sintering is very different from the flue gas from thermal power plants. The exhaust gas temperature is generally 120-150°C, which is far lower than the operating temperature above 300°C for SCR catalysts. At the same time, a large amount of Fe-containing dust in the flue gas will also affect the The lifetime of the SCR catalyst has a great influence
At the same time, SO in flue gas 2 After passing through the SCR catalytic device, some will be oxidized to SO 3 , bringing new pollution problems such as "gypsum rain"

Method used

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  • Sintering flue gas integrated type oxidization and denitration device and application thereof

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Experimental program
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Effect test

Embodiment approach

[0051] The sintering flue gas integrated oxidation denitrification device, the ozone generated by the ozone generator is passed through the venturi into the air induction pipeline, and after being merged with the air, it is passed into the diluter, diluted and mixed evenly, and evenly distributed to the sintering waste gas through the ozone distributor Oxidation and denitration in the tunnel.

[0052] The integrated oxidation and denitrification device for sintering flue gas includes a gas source input terminal, an ozone generator, an ozone output terminal, a cooling water inlet, a cooling water outlet, a Venturi, a mixing fan, a one-way regulating valve, an ozone diluter, Flange, ozone concentration detector, ozone distributor, flue;

[0053] Described ozone generator ozone output end connects Venturi;

[0054] The Venturi is inside the induced air pipeline of the induced draft fan;

[0055] The induced draft pipeline of the induced draft fan is connected with the inlet of ...

Embodiment 1

[0066] Sintering flue gas integrated oxidation denitrification device, the ozone generated by the ozone generator is mixed with the air introduced by the induced draft fan after passing through the Venturi, and then enters the diluter after passing through the expansion section pipeline for mixing and dilution. After being detected by the ozone concentration detector, the ozone is distributed The device is sprayed into the flue and oxidized in contact with the flue gas.

[0067] The Venturi is located at the center of the air-inducing pipeline, and the center coincides with the center of the air-inducing pipeline.

[0068] The Venturi constriction angle is 65°, the divergence angle is 30°, and the throat aspect ratio is 1.1.

[0069] The length of the expansion section is 0.5m.

[0070] The number of partitions in the diluter is 1, and the distance between adjacent partitions in the tube is 1m.

Embodiment 2

[0072] The difference between this embodiment and embodiment 1 is:

[0073] The Venturi constriction angle is 80°, the divergence angle is 45°, and the throat aspect ratio is 1.1.

[0074] The length of the expansion section is 1.5m.

[0075] There are 4 partitions in the diluter, and the distance between adjacent partitions in the pipe is 1.5m.

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Abstract

The invention provides a sintering flue gas integrated type oxidization and denitration device and application thereof. The integrated type device mainly comprises an ozone generator, a mixing draught fan, a Venturi, an ozone diluter and an ozone distributor. A sintering flue gas denitration function can be realized by butt joint with existing enterprise water, a gas source and a sintering waste gas flue. By virtue of the integrated type oxidization and denitration device, ozone generation, dilution, mixing and spraying control integrated operation can be realized; the integrated type oxidization and denitration device has the characteristics of simple system, strong maneuverability, small occupied space, small investment and the like; and compared with the current situations that the residual space of an existing steel enterprise sintering workshop is limited and almost newly-added denitration workshop sections are modification projects, the integrated type oxidization and denitration device has a very good application prospect.

Description

technical field [0001] The invention belongs to the field of environmental engineering, and in particular relates to an integrated oxidation and denitrification device for sintering flue gas and its application. Background technique [0002] Nitrogen oxides (NOx), which cause regional air pollution problems such as acid rain, haze, and photochemical smog, have become one of the main air pollutants in my country. In recent years, my country's total NOx emissions have continued to grow. According to the "China Environmental Statistical Annual Report", the national NOx emissions in 2012 were 23.378 million tons, of which industrial NOx emissions were 16.581 million tons, accounting for 70.9% of the national NOx emissions. The NOx emissions of iron and steel smelting enterprises were 543,000 tons (of which the sintering process emissions accounted for more than half), accounting for 3.4% of the emissions of key industrial enterprises under investigation. The NOx removal capacit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/76B01D53/56
Inventor 朱廷钰王丽英徐文青
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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