CN201244436Y

CN201244436Y - Reaction tower suitable for denitration of high-concentration flue gas

Info

Publication number: CN201244436Y
Application number: CNU200820039486XU
Authority: CN
Inventors: 俞进旺; 宋正华; 陈开明; 杨正平; 何美华; 袁海燕
Original assignee: JIANGSU ZHONGKE ENERGY SAVING ENVIRONMENTAL TECHNOLOGY Co Ltd
Current assignee: Jiangsu Kehang Environment Engineering Technology Co., Ltd.
Priority date: 2008-08-25
Filing date: 2008-08-25
Publication date: 2009-05-27
Anticipated expiration: 2018-08-25

Abstract

The utility model provides a reaction tower applied to denitration of high-concentration flue gas. The lower end of a tower body is provided with an ash bucket, and the lower opening of the ash bucket is provided with an air-locking discharging valve; two sides of the tower body are respectively provided with a gas inlet end closure and a gas outlet end closure; an inner cavity of the tower body is divided into a plurality of filtering chambers by clapboards, a rail on which catalyst is positioned in arranged in each filtering chamber, a blowing pipe of a pulse ash-clearing device is arranged above the catalyst, an gas inlet is arranged at the upper part of the catalyst corresponding to the gas inlet end closure, and a gas outlet is arranged at the lower part of the catalyst corresponding to the gas outlet end closure; and the bottom of the filtering chamber blow the gas outlet is provided with an ash outlet. As the inner cavity of the reaction tower is divided into a plurality of filtering chambers by clapboards, the working environment of the catalyst is improved effectively, the clearing of accumulated ash is more complete, so that bug dust blockage is avoided, the service life of the catalyst is prolonged and the denitration effect of the catalyst is improved; and meanwhile, online overhaul and replacement of the catalyst can be realized so that the work efficiency is improved, and the utility model is in particular applicable to the denitration of the high-concentration flue gas.

Description

A kind of reaction tower that is applicable to the high concentration denitrating flue gas

Technical field

The utility model relates to a kind of smoke eliminator, particularly a kind of reaction tower that is applicable to the high concentration denitrating flue gas.

Background technology

At present, SCR (SCR) technology is the major technique of denitrating flue gas, and it is because of having characteristics such as denitration efficiency height, technology maturation, and at home and abroad uses at most on the denitrating flue gas engineering.The existing reaction tower that is used for the SCR denitration mainly is made up of tower body, ash bucket, catalyst and deashing device, inner chamber at tower body is equipped with the multilayer track from top to bottom, settle the board-like catalyst of polylith in orbit, be provided with the ultrasonic vibration deashing device above catalyst, the below of tower body is provided with ash bucket.During work, with the mixed flue gas of reducing agent (NH3, urea), the air inlet on reaction tower enters its inner chamber, generates N under the effect of catalyst ₂And H ₂O, the flue gas after the denitration exports to the follow-up dust arrester from the one side gas outlet, bottom of reaction tower, carries out udst separation; Adhere to the dust of catalyst surface, in the ash bucket below the effect of ultrasonic vibration deashing device falls into it.Yet because board-like catalyst multilayer ground is stacked and placed in the reaction tower, dust adhered thereto is difficult to thorough removing, particularly handles for the denitration of high concentration flue gas, causes obstruction easily, causes catalyst poisoning, the reduction denitration effect; And, when overhauling, need to shut down operation, thereby greatly reduce the running efficiency of whole system at catalyst changeout more or to reaction tower.

The utility model content

Technical problem to be solved in the utility model is, at the deficiencies in the prior art, provide a kind of rational in infrastructure, the catalyst running resistance is low, ash-removal effect good, for ease of maintenaince with control, be specially adapted to the reaction tower of high concentration denitrating flue gas.

The technical scheme that its technical problem that solves the utility model adopts is: comprise tower body, ash bucket and deashing device, the lower end of tower body is provided with ash bucket, and the end opening of ash bucket is equipped with lock wind discharge valve; The both sides of tower body are respectively equipped with the air inlet end socket and the end socket of giving vent to anger, the inner chamber of tower body is separated into several filter chambers by dividing plate, be mounted with the track of placing catalyst in each filter chamber, above catalyst, be mounted with deashing device, and be provided with air inlet corresponding to the air inlet end socket on the top of catalyst, the bottom of catalyst is provided with the gas outlet corresponding to the end socket of giving vent to anger, and the bottom, filter chamber of bottom, gas outlet is provided with ash hole.During work,, enter its inner chamber from the air inlet end socket of tower body, and enter each filter chamber, under the effect of catalyst, generate N by air inlet with the mixed flue gas of reducing agent (NH3, urea) ₂And H ₂O, the flue gas after the denitration exports to the follow-up dust arrester from the gas outlet through the end socket of giving vent to anger, and carries out udst separation; Adhere to catalyst surface dust, the effect of deashing device falls into the bottom of filter chamber, falls in the ash bucket from ash hole, dust stratification is discharged by lock wind discharge valve.

Above-mentioned deashing device is the pulse ash remover that comprises gas bag, pulse valve and winding-up pipe, is provided with the winding-up pipe at the top of each filter chamber, and the winding-up pipe interlinks by pulse valve and gas bag.When needs carry out deashing to catalyst, by the effect of pulse valve, can make and discharge high-speed compressed air in the gas bag, from the ejection of winding-up pipe, catalyst is carried out pulse dust cleaning, its deashing intensity is big, effective.

Side in each filter chamber is provided with access door to be opened/closed, and pneumatic operated valve is housed on air inlet.Need overhaul or more during catalyst changeout, only need close pneumatic operated valve when a certain filter chamber, stop to supply with flue gas to be clean to this filter chamber, and the pulse valve of closing this filter chamber, can operate easily, and need not to shut down, realize on-bne repair.

The bottom of the basecoat of above-mentioned filter chamber directly and ash bucket interlink.

Aforementioned barriers is tilting, makes the bottom of filter chamber be ramped shaped, and ash hole is positioned at the bottom on slope, thereby the dust of being convenient to clean out is easy to discharge from the bottom ash hole of filter chamber, falls in the ash bucket.

Above-mentioned catalyst is that the cross section is trapezoidal board-like catalyst, its upper end is big, the lower end is little, helps dust in flue gas from passing through between catalyst, falling, and has reduced the adhesion of dust to catalyst, do not produce clogging, improve the service efficiency and the denitration effect of catalyst.

The beneficial effects of the utility model are: because the inner chamber of reaction tower is separated into several filter chambers, improved the working environment of catalyst effectively, make the cleaning of collection ash more thorough, avoided the dust obstruction, the service life and the denitration effect of catalyst have been improved, can realize simultaneously that on-bne repair reaches more catalyst changeout, improve operating efficiency, the denitration that is specially adapted to the high concentration flue gas is handled.

Description of drawings

Fig. 1 is the structural representation of the utility model embodiment.

Among the figure: 1 for lock wind discharge valve, 2 for ash bucket, 3 for catalyst, 4 for the winding-up pipe, 5 for track, 6 for dividing plate, 7 for the end socket of giving vent to anger, 8 for ash hole, 9 for the gas outlet, 10 for access door, 11 for tower body, 12 for pulse valve, 13 for gas bag, 14 for air inlet, 15 pneumatic operated valves, 16 be the air inlet end socket.

The specific embodiment

Below in conjunction with drawings and Examples the utility model is described in further detail:

The utility model mainly comprises tower body 11, ash bucket 2, catalyst 3 and deashing device; The lower end of tower body 11 is provided with ash bucket 2, and the end opening of ash bucket 2 is equipped with lock wind discharge valve 1; The both sides of tower body 11 are arranged with the air inlet end socket 16 and the end socket 7 of giving vent to anger, and the inner chamber of tower body 11 is separated into three filter chambers by two tilting dividing plates 6, and the bottom of going up two-layer filter chamber is ramped shaped, and bottom, undermost filter chamber interlinks with ash bucket 2; Side in each filter chamber is equipped with access door 10; Be mounted with the track 5 of placing catalyst 3 in each filter chamber, the catalyst 3 that is adopted is trapezoidal board-like catalyst for the cross section, and its upper end is big, the lower end is little; Top at catalyst 3 is provided with air inlet 14 corresponding to air inlet end socket 16, pneumatic operated valve 15 is housed on the air inlet 14, and the top of catalyst 3 is mounted with the winding-up pipe 4 by gas bag 13, pulse valve 12 and winding-up pipe 4 pulse ash removers that constitute, and winding-up pipe 4 interlinks by pulse valve 12 and the gas bag 13 that is installed on tower body 11 tops; In last two-layer filter chamber, be provided with gas outlet 9 in the bottom of catalyst 3 corresponding to the end socket 7 of giving vent to anger, the bottom, filter chamber of 9 bottoms, gas outlet is provided with ash hole 8.，

During work, with the mixed flue gas of reducing agent (NH3, urea), enter its inner chamber from the air inlet end socket 16 of tower body 11, the pneumatic operated valve 15 through opening enters each filter chamber from air inlet 14, generates N under the effect of catalyst 3 ₂And H ₂O, the flue gas after the denitration carry out udst separation from gas outlet 9, export to the follow-up dust arrester through the end socket 7 of giving vent to anger; Adhere to the dust on catalyst 3 surfaces,,, blow off, fall in the ash bucket from ash hole 8 to the bottom of filter chamber through pulse valve 12, from 4 ejections of winding-up pipe by the high-speed compressed air that gas bag 13 is provided.And because bottom, undermost filter chamber interlinks with ash bucket 2, the dust that cleans out can directly enter ash bucket 2, and the flue gas after the denitration exports to the follow-up dust arrester through ash bucket 2, from the end socket 7 of giving vent to anger, and carries out udst separation.Dust stratification in the ash bucket 3 is discharged by lock wind discharge valve 1.When a certain filter chamber need overhaul or more during catalyst changeout, only the pneumatic operated valve 15 that need cut out this chamber stops to supply with flue gas to be clean to this filter chamber; and the pulse valve 12 of closing this filter chamber; can operate easily, and need not to shut down, realize on-bne repair.

Claims

1, a kind of reaction tower that is applicable to the high concentration denitrating flue gas comprises tower body, ash bucket and deashing device, and the lower end of tower body is provided with ash bucket, and the end opening of ash bucket is equipped with lock wind discharge valve; It is characterized in that: the both sides of tower body are respectively equipped with the air inlet end socket and the end socket of giving vent to anger, the inner chamber of tower body is separated into several filter chambers by dividing plate, be mounted with the track of placing catalyst in each filter chamber, above catalyst, be mounted with deashing device, and be provided with air inlet corresponding to the air inlet end socket on the top of catalyst, the bottom of catalyst is provided with the gas outlet corresponding to the end socket of giving vent to anger, and the bottom, filter chamber of bottom, gas outlet is provided with ash hole.

2, a kind of reaction tower that is applicable to the high concentration denitrating flue gas according to claim 1, it is characterized in that: above-mentioned deashing device is the pulse ash remover that comprises gas bag, pulse valve and winding-up pipe, be provided with the winding-up pipe at the top of each filter chamber, the winding-up pipe interlinks by pulse valve and gas bag.

3, a kind of reaction tower that is applicable to the high concentration denitrating flue gas according to claim 1, it is characterized in that: the side in each filter chamber is provided with access door to be opened/closed, and pneumatic operated valve is housed on air inlet.

4, a kind of reaction tower that is applicable to the high concentration denitrating flue gas according to claim 1 is characterized in that: the bottom of the basecoat of above-mentioned filter chamber directly and ash bucket interlink.

5, a kind of reaction tower that is applicable to the high concentration denitrating flue gas according to claim 1, it is characterized in that: aforementioned barriers is tilting, makes the bottom of filter chamber be ramped shaped, ash hole is positioned at the bottom on slope.

6, a kind of reaction tower that is applicable to the high concentration denitrating flue gas according to claim 1 is characterized in that: above-mentioned catalyst is that the cross section is trapezoidal board-like catalyst, and its upper end is big, the lower end is little.