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SCR denitration system

A denitration and flue gas technology, applied in the field of SCR denitrification system, can solve the problems of flue dust accumulation, uneven speed of flue gas catalyst, low denitrification efficiency, etc.

Pending Publication Date: 2019-07-02
FUJIAN LONGKING
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In the SCR denitrification technology, the catalyst and the flow field are two important factors affecting the denitrification performance. If the flow field distribution is not ideal, it will cause uneven mixing of ammonia nitrogen, serious dust accumulation in the flue, and uneven speed of flue gas passing through the catalyst, resulting in Low denitrification efficiency, reduced catalyst life, serious ammonia slip, etc.

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Embodiment Construction

[0026] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0027] Please refer to Figure 1 to Figure 3 , figure 1 It is a structural schematic diagram of a specific embodiment of the SCR denitrification system provided by the present invention; figure 2 for figure 1 Partial enlarged view of the location of the middle flue gas comber; image 3 for figure 2 Partial enlarged view of part A in the middle.

[0028] In this embodiment, the SCR denitrification system includes a tower body 110, and the tower body 110 has a flue gas inlet and a flue gas outlet. Specifically, the flue gas inlet of the tower body 110 is connected with an inlet pipe 120, and the flue gas outlet is connected with an outlet pipe 130. . A guide structure or the like may be provided in the air intake pipe 120 to g...

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Abstract

The invention discloses an SCR denitration system. The SCR denitration system comprises: a tower body provided with a flue gas inlet and a flue gas outlet, wherein a gas flow distribution plate is arranged at a position, close to the flue gas inlet, of the tower body, and catalyst layers are arranged in the tower body; and a flue gas comber, wherein the flue gas comber is located between the gas flow distribution plate and the catalyst layers, and the flue gas comber comprises a filter bag layer formed by a plurality of filter bags to make flue gas flow to the catalyst layers after flowing through the filter bag layer. The flue gas flow path of the SCR denitration system is provided with the flue gas comber, and the structure of the flue gas comber makes dusty flue gas uniformly distributed and the flow rate deviation of the gas flow reduced, so the ammonia escape rate is reduced, and the denitration efficiency is improved.

Description

technical field [0001] The invention relates to the technical field of coal-fired flue gas purification, in particular to an SCR denitrification system. Background technique [0002] my country is a major coal production and consumption country in the world. Environmental pollution caused by coal-based power production is a restrictive factor for the development of my country's power industry. According to relevant standards, there are strict regulations on nitrogen oxide emissions from thermal power units. requirements. [0003] At present, the flue gas denitrification process used in engineering practice mainly includes SCR (Selective Catalytic Reduction) denitrification technology. The denitrification reducing agent (commonly used are liquid ammonia, ammonia water and urea, etc.) selectively interacts with NO in the flue gas x React to generate nitrogen and water, thereby removing NO in the flue gas x , this technology is widely used due to its advantages of convenient ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D53/90B01D53/56B01D46/24B01D46/04B01D46/02B01D46/00
CPCB01D53/8631B01D53/90B01D46/023B01D46/04B01D46/2403B01D2258/0283B01D46/72
Inventor 胡佩英林宏尤燕青陈奎续左鹏朱召平王永桥
Owner FUJIAN LONGKING