CN203447985U

CN203447985U - Ash blowing device of SCR (Selective Catalytic Reduction) denitration reactor

Info

Publication number: CN203447985U
Application number: CN201320560411.7U
Authority: CN
Inventors: 杨健
Original assignee: Hunan Lunan Desulfurization & Denitration Technology Co Ltd
Current assignee: Hunan Lunan Desulfurization & Denitration Technology Co Ltd
Priority date: 2013-09-11
Filing date: 2013-09-11
Publication date: 2014-02-26
Anticipated expiration: 2023-09-11

Abstract

The utility model discloses an ash cleaning device of an SCR (Selective Catalytic Reduction) denitration reactor. The ash cleaning device comprises an air compressor, a buffering tank, an electromagnetic valve and gas-ejecting pipe network unit modules, which are communicated with one another in sequence, wherein the gas-ejecting pipe network unit modules are positioned above catalyst units in the SCR denitration reactor and are in one-to-one correspondence to the catalyst units. The ash cleaning device utilizes the air compressor to provide an ash-blowing air source to the gas-ejecting pipe network unit modules, utilizes the buffering tank to store and release compressed air, utilizes the electromagnetic valve to control opening and closing of the buffering tank and utilizes the gas-ejecting pipe network unit modules in one-to-one correspondence to the catalyst units to blow ash oppositely to a catalyst. The ash cleaning device disclosed by the utility model has the advantages that dried compressed air is adopted as an ash blowing medium, so that normal working of the catalyst in a drying state is ensured; when the compressed air is used for cleaning deposited ash, no vibration and high temperature are caused, the covering surface is large, no dead corners exist in ash cleaning, no residual deposited ash is generated, the service life of the catalyst is prolonged, the replacing period of the catalyst is delayed, the denitration efficiency is effectively improved and energy is saved.

Description

Soot blower for SCR Benitration reactor

Technical field

The utility model relates to a kind of SCR Benitration reactor, is specifically related to a kind of soot blower of SCR Benitration reactor.

Background technology

Traditional SCR Benitration reactor deashing mainly contains five kinds of modes at present: mechanical vibrator formula, sound wave type, steam rake, shock wave type high, steel ball rolling type.Wherein mechanical rapping cleaning dust and steel ball rolling deashing, because oscillation intensity is greatly very easily damaged catalyst, catalyst is because being subject to strong external force broken, real inadvisable.Steam rake deashing adopts steam to do sootblowing dielectric, consume quantity of steam large, blow in grey process because of moisture and separate out in a large number and produce condensate water and affect catalyst service life.Catalyst operating specification requires the moisture in flue gas must be less than 10%, and the amount of separating out of steam moisture exists the hidden danger higher than 10%.The not enough deashing of rake deashing coverage rate is not thorough in addition, and still having relatively large dust stratification to remain in affects denitration efficiency on catalyst.Although sound wave type deashing coverage rate is larger than rake deashing, blow the not enough weak effect of grey dynamics.Shock wave and blast that when shock wave type high deashing utilizes ignited fuel, instantaneous explosion produces blow ash, because explosion time produces 1000 ℃ of high temperature, have a strong impact on the life-span of catalyst.The temperature that can bear because of catalyst is up to 450 ℃, and the high temperature catalyst of 1000 ℃ cannot bear at all, will damage in a short time inefficacy.In sum, all there is the significant deficiency that is difficult to overcome in traditional purge mode.

Utility model content

The purpose of this utility model is to provide that a kind of SCR of making Benitration reactor deashing is thorough, denitration efficiency is high, the soot blower of catalyst long service life.

The disclosed this deashing device for SCR Benitration reactor of the utility model, it comprises air compressor, surge tank, magnetic valve and the air jet pipe net unit module being communicated with successively, air jet pipe net unit module is positioned at the top of SCR Benitration reactor inner catalyst unit, with catalyst elements corresponding layout one by one.

Described air jet pipe net unit module comprises air supply header, main distribution conduit and some jet grey arms that blows, air supply header is communicated with the outlet of described magnetic valve, main distribution conduit is connected in the below of air supply header, jetly blow longitudinal both sides that grey arm is vertically distributed in main distribution conduit, the jet downside that blows grey arm is evenly equipped with fumarole.

Upside and the downside of described catalyst elements are provided with pressure sensor, for the real-time empty atmospheric pressure data to control centre's transmission catalyst elements upside and downside, so that control centre sends instruction to the switching motion of magnetic valve.

The utility model utilizes air compressor to provide and blow grey source of the gas to air jet pipe net unit module, utilize surge tank to store and discharge compressed air, utilize magnetic valve to control opening or closing of surge tank, utilize with catalyst elements one by one the air jet pipe net unit module of corresponding layout over against catalyst elements contact, blow ash, brute force blows the dust stratification in catalyst elements in the ash bucket that falls into reactor bottom off.

The corresponding layout one by one of air jet pipe net unit module and catalyst elements, the jet fumarole blowing on grey arm blows ash over against catalyst, blows grey great efforts, there is no dead angle, and deashing is thorough.Each caliber of air jet pipe net unit module and the jet fumarole blowing on grey arm all can be selected according to actual needs, and the parameter of blowing ash gas also can regulate as required at any time, use and can guarantee flexibly to blow grey effect.

With prior art, compare, it is sootblowing dielectric that the utility model adopts dry compressed air, guarantees that catalyst works under drying regime.Inorganicly during compressed air cleaning dust stratification shake, without high temperature, wide coverage, deashing without dead angle, residual without dust stratification, improve the service life of catalyst, extended the replacement cycle of catalyst, thereby improved denitration efficiency, the saving energy, there is economic benefit significantly, there is novelty and pioneering.

Accompanying drawing explanation

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

Fig. 2 is the schematic side view of blowing pipe net unit module in Fig. 1.

Fig. 3 is the elevational schematic view of Fig. 2.

The specific embodiment

As shown in Figure 1 to Figure 3, the disclosed this soot blower for SCR Benitration reactor of the utility model, comprise air compressor 1, surge tank 2, magnetic valve 3 and blowing pipe net unit module 4, blowing pipe net unit module 4 is positioned at the top of SCR Benitration reactor 5 inner catalyst unit 6, with catalyst elements 6 corresponding setting one by one.Blowing pipe net unit module 4 comprises air supply header 41, main distribution conduit 42 and some jet grey arms 43 that blows.Main distribution conduit 42 is connected in the below of air supply header 41, and distribution arm 43 is distributed in longitudinal both sides of main gas-distribution pipe 42, and the downside that grey arm 43 is blown in distribution is evenly equipped with fumarole 44.The compressed air outlet of air compressor 1 is communicated with the entrance of surge tank 2 by pipeline, and the entrance of the compressed air outlet of surge tank 2 and magnetic valve 3 is by pipeline communication, and the outlet of magnetic valve 3 is communicated with air supply header 41 by pipeline.The upside of catalyst elements 6 and downside are provided with pressure sensor 7.

Blowing pipe net unit module 4 can be fixing by the support nearby 8 of SCR Benitration reactor inwall, installation, convenient disassembly.

Operation principle of the present utility model is as follows:

The pressure sensor 7 of catalyst elements 6 upsides and downside is to the real-time pressure data of control centre's transmission catalyst elements 6 upper and lower sides air.When the dust stratification in catalyst elements 6 gets more and more, the pressure reduction of its upper and lower sides is increasing.When this pressure difference reaches the maximum of setting, control centre controls magnetic valve 3 and automatically opens, compressed air is entered the air supply header 41 of blowing pipe net unit module 4 through magnetic valve 3 by surge tank 2, then through main distribution conduit 42, be dispensed to every jet blowing in grey arm 43 from fumarole 44 ejections of its downside and realize and blow ash action.

Along with blowing the carrying out of grey process, the continuous compressed air of dust stratification in catalyst elements 6 blows off, the pressure reduction of its upper and lower sides reduces gradually, when this pressure difference reaches the minimum of a value of setting, control centre controls magnetic valve 3 and automatically closes, surge tank 2 stops to the interior air feed of SCR Benitration reactor 5, and air compressor 1 is thereupon out of service, and one time deashing process completes.

Along with the continuation of SCR Benitration reactor 5 is used, dust stratification on its inner catalyst unit 6 is more and more, the pressure reduction of catalyst elements 6 upper and lower sides can reach the maximum of setting again, now magnetic valve 3 is opened again automatically, air supply header 41 air feed of compressed air in again from surge tank 2 to SCR Benitration reactor 5, enter and blow grey process next time.In the use procedure of SCR Benitration reactor 5, in catalyst elements, the reset procedure of dust stratification so repeats, and all deashing process automatic on-lines carry out.

Air supply header 41, main distribution conduit 42 and jet caliber grating of blowing grey arm 43 need accurate Calculation, jet blow grey arm 43 quantity number should be when blowing the required tolerance of ash and compressed air ejection speed, blow the required dynamics of ash and calculate, to guarantee that the dust stratification that has enough atmospheric pressures to blow off completely in catalyst elements 6 in pipe network module is as the criterion.

Claims

1. the deashing device for SCR Benitration reactor, it is characterized in that: this device comprises air compressor, surge tank, magnetic valve and the air jet pipe net unit module being communicated with successively, air jet pipe net unit module is positioned at the top of SCR Benitration reactor inner catalyst unit, with catalyst elements corresponding layout one by one.

2. the deashing device for SCR Benitration reactor as claimed in claim 1, it is characterized in that: described air jet pipe net unit module comprises air supply header, main distribution conduit and some jet grey arms that blows, air supply header is communicated with the outlet of described magnetic valve, main distribution conduit is connected in the below of air supply header, jetly blow longitudinal both sides that grey arm is vertically distributed in main distribution conduit, the jet downside that blows grey arm is evenly equipped with fumarole.

3. the deashing device for SCR Benitration reactor as claimed in claim 1, is characterized in that: upside and the downside of described catalyst elements are provided with pressure sensor.