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Device and method for pre-removing coarse particle ash in front of SCR denitration device

A coarse particle and denitrification technology, which is applied in separation methods, chemical instruments and methods, and separation of dispersed particles, can solve problems such as ingress, and achieve the effect of reducing investment and high ash removal efficiency

Pending Publication Date: 2020-10-30
XIAN TPRI BOILER ENVIRONMENTAL PROTECTION ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Conventional economizer flue and ash hopper design, which can only collect about 5% of the total ash, most of the ash will still enter the follow-up flue and equipment

Method used

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  • Device and method for pre-removing coarse particle ash in front of SCR denitration device

Examples

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Embodiment Construction

[0013] The present invention is described in further detail below in conjunction with accompanying drawing:

[0014] refer to figure 1 The device for pre-removing coarse particle ash before the SCR denitrification device according to the present invention includes an economizer outlet flue 1, an economizer ash hopper 5, several baffles 2, several ash collecting hoppers 3 and several ash falling pipes 4 ; The top of the economizer outlet flue 1 is provided with a flue gas inlet, each baffle 2 is distributed in the economizer outlet flue 1 in turn, and the outermost baffle 2 is fixed on the economizer outlet flue 1 On the outer wall, the outermost baffles 2 are obliquely distributed, and the rest of the baffles 2 have a herringbone structure or other structures that can enrich the dust and lead it into the ash hopper 3, while the smoke continues through the gaps between the baffles 2. In the structural form of the subsequent flue, there are gaps between adjacent baffles 2, wher...

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Abstract

The invention discloses a device and method for pre-removing coarse particle ash in front of an SCR denitration device. The device comprises an economizer outlet flue, an economizer ash hopper, a plurality of baffle plates, a plurality of ash collecting hoppers and a plurality of ash falling pipes. A flue gas inlet is formed in the top of the economizer outlet flue, the baffle plates are sequentially distributed in the economizer outlet flue, the baffle plate on the outermost side is fixed on the outer wall of the economizer outlet flue, the baffle plate on the outermost side is obliquely distributed, the other baffle plates are of herringbone structures or other structural forms capable of enriching dust and guiding the dust into the dust collecting hoppers, a gap is formed between everytwo adjacent baffle plates, wherein one gap corresponds to one ash collecting hopper and one ash falling pipe, the ash collecting hopper is located below the corresponding gap, a bottom outlet of theash collecting hopper is communicated with the upper end of the corresponding ash falling pipe, and the lower ends of the ash falling pipes penetrate through the side wall of the economizer outlet flue to be inserted into the economizer ash hopper. The device and the method can effectively improve the ash collecting effect of the economizer flue.

Description

technical field [0001] The invention belongs to the field of dust removal, and relates to a device and method for pre-removing coarse particle dust before an SCR denitrification device. Background technique [0002] Due to the coal quality and combustion system, many coal-fired boilers have relatively coarse dust particles. The ash particles with a particle size of more than 200 μm account for a relatively large proportion, and there are even particles with a particle size as high as 1000-2000 μm. These particles will cause serious wear and tear to the subsequent flue and catalyst. The design of conventional economizer flue and ash hopper can only collect about 5% of the total ash, and most of the ash will still enter the follow-up flue and equipment. Contents of the invention [0003] The purpose of the present invention is to overcome the above-mentioned shortcomings of the prior art, and provide a device and method for pre-removing coarse particle ash before the SCR d...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01D45/06F23J15/00B01D53/86B01D53/56
CPCB01D45/06F23J15/00B01D53/8631
Inventor 王晓冰罗志牛国平周梦伟杨晓刚张广才常磊潘栋安振尚桐姚皓
Owner XIAN TPRI BOILER ENVIRONMENTAL PROTECTION ENG CO LTD
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