CN108854528A - Cement industry kiln low-temperature denitration dust removal integrated plant - Google Patents

Cement industry kiln low-temperature denitration dust removal integrated plant Download PDF

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Publication number
CN108854528A
CN108854528A CN201810938431.0A CN201810938431A CN108854528A CN 108854528 A CN108854528 A CN 108854528A CN 201810938431 A CN201810938431 A CN 201810938431A CN 108854528 A CN108854528 A CN 108854528A
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CN
China
Prior art keywords
catalyst filter
outlet
flue gas
catalyst
collection
Prior art date
Application number
CN201810938431.0A
Other languages
Chinese (zh)
Inventor
谷化强
李华东
吴飞
刘科
张立凯
李金虎
Original Assignee
深圳市凯盛科技工程有限公司
中建材蚌埠玻璃工业设计研究院有限公司
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Priority to CN201810938431.0A priority Critical patent/CN108854528A/en
Publication of CN108854528A publication Critical patent/CN108854528A/en

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86Catalytic processes
    • B01D53/8621Removing nitrogen compounds
    • B01D53/8625Nitrogen oxides
    • B01D53/8631Processes characterised by a specific device
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D46/00Filters, i.e. particle separators or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0027Filters, i.e. particle separators or filtering processes specially modified for separating dispersed particles from gases or vapours with additional separating or treating functions
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D53/00Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
    • B01D53/34Chemical or biological purification of waste gases
    • B01D53/74General processes for purification of waste gases; Apparatus or devices specially adapted therefor
    • B01D53/86Catalytic processes
    • B01D53/90Injecting reactants
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2258/00Sources of waste gases
    • B01D2258/02Other waste gases
    • B01D2258/0233Other waste gases from cement factories
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B01PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01DSEPARATION
    • B01D2258/00Sources of waste gases
    • B01D2258/02Other waste gases
    • B01D2258/0283Flue gases

Abstract

The present invention discloses cement industry kiln low-temperature denitration dust removal integrated plant, including:Ammonia supply department, catalyst filter house and by-product collection portion, catalyst filter house include catalyst filter collector, and the entrance of catalyst filter collector connects flue gas ash removal pipeline, and the outlet of catalyst filter collector is connected with air-introduced machine;By-product collection portion includes rotary valve, chain type cinder conveyer, Pneumatic ash conveying machine and by-product storage warehouse;Ammonia supply department, catalyst filter house and by-product collection portion are set on the basis of the smoke gas treatment of genuine area and power generation process with waste heat, reduces cost, shorten the construction period, each section cooperates, and flue gas ash removal efficiency is up to 99.9%, and denitration efficiency is up to 94% or more;Granular material discharged concentration can be achieved lower than 10mg/m3, discharged nitrous oxides concentration be lower than 100mg/m3

Description

Cement industry kiln low-temperature denitration dust removal integrated plant
Technical field
The present invention relates to cement kiln smoke gas treatment technical fields, specifically cement industry kiln low-temperature denitration dedusting one Makeup is set.
Background technique
China is manufacture of cement and consumption big country, and cement output reaches 22.1 hundred million tons within 2012, accounts for world's cement output 56%, the existing above cement production enterprise of scale about 4000, wherein more than 2400 families of clinker manufacturing enterprise, new dry process water Mud production line 1600 is a plurality of.According to statistics, China's cement industry particulate matter(PM)Discharge accounts for the 15%~20% of national discharge amount, dioxy Change sulphur emissions and account for the 3%~4% of national discharge amount, discharged nitrous oxides account for the 8%~10% of national discharge amount, belong to the weight of contamination control Point industry.It is the end of the year in 2013, revised《Cement industry atmosphere pollutants emission standards》(GB4915-2013)Publication, to big Gas pollutant emission limit is provided, wherein particulate matter, emission limits of nitrogen oxides are respectively 30,400mg/m3, especially Limit value is respectively 20,320mg/m3.Currently, in the provincial standard of some areas, it is right《Cement industry atmosphere pollutants emission standards》 Discharge standard improved to:Particulate matter, emission limits of nitrogen oxides are respectively 20,100mg/m3
Currently, the whereabouts of the flue gas of the preheated device discharge of new dry process rotary kiln furnace has at three:Dry crude fuel, drying life Material, cogeneration, flue gas enters after sack cleaner gathers dust and discharges later.And the concentration of NOx is in 600~1600mg/Nm3It is left The right side, the control technology of NOx mainly use selective non-catalytic reduction method (SNCR).SNCR is using urea or weak aqua ammonia conduct Reducing agent is injected directly into the region that fire box temperature is 1000~1250 DEG C, reducing agent NH therein3With the NOx in flue gas Reaction generates N2And H2O, denitration efficiency are only 40~60%, have been unable to satisfy increasingly strict environmental protection standard.
Summary of the invention
The purpose of the present invention is to provide cement industry kiln low-temperature denitration dust removal integrated plant, which is effectively reduced Cement kiln flue gas nitrogen oxides discharges pollutants, and so that discharge is met limit value requirement, and be provided simultaneously with dust collection capacity, saving accounts for Ground, simple process.
The technical solution adopted by the present invention to solve the technical problems is:
Cement industry kiln low-temperature denitration dust removal integrated plant, including:
A, ammonia supply department,
Ammonia supply department includes ammonia input pipe, gas mixing storehouse and dilution air, and the pipeline of ammonia input pipe is successively arranged pass Disconnected valve, flowmeter, regulating valve and pressure gauge, the two entrances in gas mixing storehouse are separately connected the outlet and dilution of ammonia input pipe Blower;
B, catalyst filter house,
Catalyst filter house includes catalyst filter collector, and the entrance of catalyst filter collector connects flue gas ash removal pipeline, catalyst mistake The outlet of filtering dust remover is connected with air-introduced machine;The outlet in gas mixing storehouse connects flue gas ash removal pipeline;
C, by-product collection portion,
By-product collection portion includes rotary valve, chain type cinder conveyer, Pneumatic ash conveying machine and by-product storage warehouse, and rotary valve is set to catalyst The ash bucket of filter collector exports, and chain type cinder conveyer is set to below rotary valve and is connected with rotation valve outlet, Pneumatic ash conveying machine The outlet of entrance and chain type cinder conveyer be connected, the outlet of Pneumatic ash conveying machine passes through by-product property management auxiliary connection product storage storehouse, by-product The top of object storage warehouse is equipped with deduster.
Further, the flue gas ash removal pipeline is connected with bypass mixing flue, and bypass mixing flue is for being passed through cement The flue gas of waste heat boiler front end.
The invention has the advantages that
One, ammonia supply department, catalyst filter house and by-product are set on the basis of the smoke gas treatment of genuine area and power generation process with waste heat Object collection portion reduces cost, shortens the construction period, and each section cooperates, and for flue gas ash removal efficiency up to 99.9%, denitration efficiency is reachable 94% or more;Granular material discharged concentration can be achieved lower than 10mg/m3, discharged nitrous oxides concentration be lower than 100mg/m3
Two, before flue gas enters catalyst filter house, the flue gas of cement residual heat boiler front end is introduced, is filtered to catalyst is entered The flue-gas temperature in portion is adjusted, and ensure that the stability of system.
Three, the flue gas of cement residual heat boiler front end is introduced in bypass mixing flue, dust concentration is high, CaO content up to 40% with On, it is natural desulfurizing agent, after entering catalyst filter collector, the lime particle carried in flue gas can shape during dust accumulation At lime particle layer cake, lime particle layer cake increases desulphurization reaction, to the further desulfurization of flue gas, improves 5~15% desulfurization Efficiency.
Four, catalyst filter collector can guarantee that temperature stablizes denitration at 220~240 DEG C, and efficiency is real up to 80~90% The ability for having showed cement residual heat boiler rear end bag house outlet direct denitration, eliminate traditional SCR denitration process to 300~ The demand of 380 DEG C of temperature windows simplifies process flow, meanwhile, it ensure that residual heat generating efficiency.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples:
Fig. 1 is structural schematic diagram of the invention.
Specific embodiment
As shown in Figure 1, the present invention provides cement industry kiln low-temperature denitration dust removal integrated plant, including:
A, ammonia supply department,
Ammonia supply department includes ammonia input pipe 17, gas mixing storehouse 15 and dilution air 16, the pipeline of ammonia input pipe 17 according to Secondary to be equipped with shut-off valve 11, flowmeter 12, regulating valve 13 and pressure gauge 14, the two entrances in gas mixing storehouse 15 are separately connected ammonia The outlet of input pipe 17 and dilution air 16;
B, catalyst filter house,
Catalyst filter house includes catalyst filter collector 2, and the entrance of catalyst filter collector 2 connects flue gas ash removal pipeline 3, catalyst The outlet of filter collector 2 is connected with air-introduced machine 4;The outlet in gas mixing storehouse 15 connects flue gas ash removal pipeline 3;
C, by-product collection portion,
By-product collection portion includes rotary valve 51, chain type cinder conveyer 52, Pneumatic ash conveying machine 53 and by-product storage warehouse 54, rotary valve 51 ash buckets 21 for being set to catalyst filter collector 2 export, and chain type cinder conveyer 52 is set to 51 lower section of rotary valve and goes out with rotary valve 51 Mouth is connected, and the entrance of Pneumatic ash conveying machine 53 is connected with the outlet of chain type cinder conveyer 52 by delivery pipe 55, Pneumatic ash conveying machine 53 Outlet is equipped with deduster 57 by 56 auxiliary connection product storage storehouse 54 of by-product property management, the top of by-product storage warehouse 54.
Preferably, flue gas ash removal pipeline 3 is connected with bypass mixing flue 6, bypass mixing flue 6 is for being passed through cement The flue gas of waste heat boiler front end.Flue gas ash removal pipeline 3 is equipped with the first flue shutter 31, and bypass mixing flue 6 is equipped with the second flue Flashboard 61.
In use, opening the first flue shutter 31, cement kiln bag house outlet flue gas is introduced into flue gas ash removal pipe Road 3, about at 160~240 DEG C, is not suitable for being directly entered catalyst filter collector, be easy to appear not since the flue-gas temperature is relatively low Stable situation opens the second flue shutter 61, before fraction cement residual heat boiler for the efficiency for ensuring flue gas low-temperature denitration It holds flue gas to introduce, the flue-gas temperature into catalyst filter collector 2 is made to maintain 220~240 DEG C.Ammonia passes through ammonia input pipe 17, enter gas mixing storehouse 15 via shut-off valve 11, flowmeter 12, regulating valve 13 and pressure gauge 14, and pass through dilution air 16 Enter flue gas ash removal pipeline 3 after dilution, ammonia and flue gas are sufficiently mixed latter same into catalyst filter collector 2, flue gas and ammonia Gas catalytic reduction reaction in catalyst filter collector 2, is reduced to nitrogen and water for nitrogen oxides, is discharged after through air-introduced machine 4; Catalyst filter collector 2 is also dusted simultaneously, and by-product drains into chain type cinder conveyer by the ash bucket 21 of catalyst filter collector 2 52, chain type cinder conveyer 52 send by-product to Pneumatic ash conveying machine 53, and Pneumatic ash conveying machine 53 send by-product to by-product storage warehouse 54 are collected, and deduster 57 can be dusted when collecting.
The above described is only a preferred embodiment of the present invention, being not intended to limit the present invention in any form;Appoint What those skilled in the art, without departing from the scope of the technical proposal of the invention, all using the side of the disclosure above Method and technology contents make many possible changes and modifications to technical solution of the present invention, or are revised as the equivalent reality of equivalent variations Apply example.Therefore, anything that does not depart from the technical scheme of the invention according to the technical essence of the invention do above embodiments Any simple modification, equivalent replacement, equivalence changes and modification, all of which are still within the scope of protection of the technical scheme of the invention.

Claims (2)

1. cement industry kiln low-temperature denitration dust removal integrated plant, which is characterized in that including:
A, ammonia supply department,
Ammonia supply department includes ammonia input pipe, gas mixing storehouse and dilution air, and the pipeline of ammonia input pipe is successively arranged pass Disconnected valve, flowmeter, regulating valve and pressure gauge, the two entrances in gas mixing storehouse are separately connected the outlet and dilution of ammonia input pipe Blower;
B, catalyst filter house,
Catalyst filter house includes catalyst filter collector, and the entrance of catalyst filter collector connects flue gas ash removal pipeline, catalyst mistake The outlet of filtering dust remover is connected with air-introduced machine;The outlet in gas mixing storehouse connects flue gas ash removal pipeline;
C, by-product collection portion,
By-product collection portion includes rotary valve, chain type cinder conveyer, Pneumatic ash conveying machine and by-product storage warehouse, and rotary valve is set to catalyst The ash bucket of filter collector exports, and chain type cinder conveyer is set to below rotary valve and is connected with rotation valve outlet, Pneumatic ash conveying machine The outlet of entrance and chain type cinder conveyer be connected, the outlet of Pneumatic ash conveying machine passes through by-product property management auxiliary connection product storage storehouse, by-product The top of object storage warehouse is equipped with deduster.
2. cement industry kiln low-temperature denitration dust removal integrated plant according to claim 1, which is characterized in that the cigarette Gas cleaning shaft is connected with bypass mixing flue, and bypass mixing flue is used to be passed through the flue gas of cement residual heat boiler front end.
CN201810938431.0A 2018-08-17 2018-08-17 Cement industry kiln low-temperature denitration dust removal integrated plant CN108854528A (en)

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Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104998680A (en) * 2015-07-13 2015-10-28 煤炭工业济南设计研究院有限公司 Low temperature denitration catalyst for anti-SO2 and H2O poisoning and preparation method of same
CN105169942A (en) * 2015-09-23 2015-12-23 广州创能环保科技有限公司 Glass melter flue gas dust removal, desulfurization and denitrification synergetic treatment system, treatment method and application
CN105289272A (en) * 2015-10-27 2016-02-03 江苏海澜正和环境科技有限公司 Low-temperature denitration device and method for denitration through low-temperature denitration device
CN105618028A (en) * 2014-11-02 2016-06-01 中国科学院大连化学物理研究所 Catalyst for coke oven smoke denitration and preparation method thereof
CN105664717A (en) * 2016-03-09 2016-06-15 南京中电环保科技有限公司 Desulphurization, denitration and dust removal integrated treatment process of exhaust gas
CN205627573U (en) * 2016-05-11 2016-10-12 华能国际电力股份有限公司 System for dust and NOx minimum discharge under high temperature
CN106334423A (en) * 2016-08-26 2017-01-18 成都国化环保科技有限公司 Low temperature denitration process based on activated carbon material
CN207667445U (en) * 2017-12-21 2018-07-31 桐乡市致远环保科技有限公司 A kind of waste gas of industrial kiln and furnace processing integration apparatus
CN207680363U (en) * 2017-11-16 2018-08-03 广州创皓环保科技有限公司 Emission-control equipment

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105618028A (en) * 2014-11-02 2016-06-01 中国科学院大连化学物理研究所 Catalyst for coke oven smoke denitration and preparation method thereof
CN104998680A (en) * 2015-07-13 2015-10-28 煤炭工业济南设计研究院有限公司 Low temperature denitration catalyst for anti-SO2 and H2O poisoning and preparation method of same
CN105169942A (en) * 2015-09-23 2015-12-23 广州创能环保科技有限公司 Glass melter flue gas dust removal, desulfurization and denitrification synergetic treatment system, treatment method and application
CN105289272A (en) * 2015-10-27 2016-02-03 江苏海澜正和环境科技有限公司 Low-temperature denitration device and method for denitration through low-temperature denitration device
CN105664717A (en) * 2016-03-09 2016-06-15 南京中电环保科技有限公司 Desulphurization, denitration and dust removal integrated treatment process of exhaust gas
CN205627573U (en) * 2016-05-11 2016-10-12 华能国际电力股份有限公司 System for dust and NOx minimum discharge under high temperature
CN106334423A (en) * 2016-08-26 2017-01-18 成都国化环保科技有限公司 Low temperature denitration process based on activated carbon material
CN207680363U (en) * 2017-11-16 2018-08-03 广州创皓环保科技有限公司 Emission-control equipment
CN207667445U (en) * 2017-12-21 2018-07-31 桐乡市致远环保科技有限公司 A kind of waste gas of industrial kiln and furnace processing integration apparatus

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