CN105169910A - Kiln and furnace flue gas dedusting and harmful gas cooperative purifying apparatus - Google Patents

Kiln and furnace flue gas dedusting and harmful gas cooperative purifying apparatus Download PDF

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Publication number
CN105169910A
CN105169910A CN201510556668.9A CN201510556668A CN105169910A CN 105169910 A CN105169910 A CN 105169910A CN 201510556668 A CN201510556668 A CN 201510556668A CN 105169910 A CN105169910 A CN 105169910A
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flue gas
absorber
cooler
gas
furnace flue
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CN201510556668.9A
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CN105169910B (en
Inventor
姚群
冯斌
孙军军
朱俊杰
钱磊
李光
倪守强
马晓辉
刘世铮
余建华
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Tiancheng Environment Protection Technology Co Ltd Zhonggang Group
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Tiancheng Environment Protection Technology Co Ltd Zhonggang Group
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Abstract

The invention relates to a kiln and furnace flue gas dedusting and harmful gas cooperative purifying apparatus. The apparatus comprises a bag deduster 1 and an automatic control system 9, and the bag deduster 1 comprises a gas inlet 10, a middle box body 11, an upper box body 12, an ash hopper 13, a filter bag 14 and an ash removal device 15; the outlet side of the upper box body 12 is sequentially provided with a bend 2, a cooler 3, a switch valve 4, an adsorber 5, a gas collection tank 6 and a gas outlet 7 from top to bottom; the gas inlet 10 is provided with an NH3 ejector 8; and the bend 2, the cooler 3, the switch valve 4, the adsorber 5, the gas collection tank 6 and the gas outlet 7 arranged behind the gas inlet 10 are connected or welded through flanges, and the automatic control system 9 is connected with the bag deduster 1, the cooler 3, the switch valve 4, the adsorber 5 and the NH3 ejector 8 through a signal line. The apparatus can simultaneously purify fine particulate dusts and various harmful gases in the flue gas, is a set of apparatus formed through organically compounding the bag filter, the bag filter and the NH3 ejector, and has the advantages of simplification of the flue gas purification process flow, reduction of the occupied area, and reduction of the project investment and the running energy consumption.

Description

Furnace flue gas dedusting and pernicious gas synergistic purification device
Technical field
The invention belongs to the purification techniques field of the industrial furnace flue gases such as field of Environment Protection boiler smoke, flue gas of refuse burning, steel-smelting electric furnace flue gas, sinter fume, be specifically related to a kind of furnace flue gas dedusting and pernicious gas synergistic purification device, while high temperature fume dust removal, can also SO in purifying smoke 2, NO x, mercury, the pernicious gas such as dioxin.
Background technology
Normal containing dust, SO in industrial furnace flue gas 2, NO x, mercury, the pollutant such as dioxin, according to environmental requirement, these pollutants must purify, and can discharge after reaching discharge standard.
In engineering, gas cleaning is generally implemented step by step, causes the equipment plural serial stage of flue gas purification system, namely arranges separately catalytic reactor to remove the NO in flue gas xor dioxin, sack cleaner is set separately to remove dust in flue gas, desulphurization plant is set separately to remove SO in flue gas 2etc..These purifiers are normally independently arranged, not association, and the time started also may not be identical, and whole flue gas purification system takes up an area large, and invest high, energy consumption is high, also often by place restriction difficult arrangement.In reality, shortage set of device removes the purification equipment of multiple pollutant simultaneously.
Number of patent application 2014100217687.7 patent document discloses a kind of flue-gas granule and gaseous contaminant works in coordination with removal device, it comprises high-temperature flue gas bag hose, catalytic reactor and automatic control system, and is combined into an entirety.Be provided with catalytic reactor in the outlet of sack cleaner, dust granules thing removed by sack cleaner, and NO in flue gas removed by catalytic reactor xgaseous contaminants such as (or dioxin), realizes synergistic purification.But owing to being catalytic reaction, this catalytic reactor can not remove SO 2,, other pollutant such as mercury, therefore this device has certain limitation, is applicable to the occasion not needing desulfurization, or, again desulfurizer is installed in its downstream.
Summary of the invention
The object of the invention is the deficiency existed for above-mentioned prior art, propose a kind of furnace flue gas dedusting and pernicious gas synergistic purification device, while flue gas ash removal, SO in flue gas can also be removed 2,, NO x, mercury, the multiple pernicious gas such as dioxin, realize that various pollutants of fume is collaborative to be removed, to reduce occupations of land, to invest and operation energy consumption in one apparatus.
Technical solution of the present invention is: a kind of furnace flue gas dedusting and pernicious gas synergistic purification device, comprise sack cleaner, elbow, cooler, switch valve, absorber, plenum chamber, exhaust outlet, NH 3injector, automatic control system; Sack cleaner comprises air inlet, middle casing, upper box, ash bucket, filter bag, deashing device, air inlet is arranged on middle casing airintake direction side, casing is installed on middle casing top, filter bag is suspended on the card of upper box, in upper box, arrange deashing device, ash bucket is arranged on the below of middle casing; Elbow, cooler, switch valve, absorber, plenum chamber, exhaust outlet is set gradually from top to down at the outlet side of upper box; Air inlet place is provided with NH 3injector; By Flange joint or welding between elbow after upper box outlet, cooler, switch valve, absorber, plenum chamber, exhaust outlet, automatic control system is by holding wire and sack cleaner, cooler, switch valve, absorber, NH 3injector is connected.
Further, described absorber is device multicomponent gas to adsorption function, and adsorbent can be active carbon, NACF, molecular sieve, zeolite etc., and adsorbent is determined depending on absorption object.Adsorber structure can be box, also can be drawer type, and base plate is metallic porous sheet or gauze, absorber framework and switch valve Flange joint.
Further, the magnitude setting of described absorber can change, and magnitude setting is more than or equal to 1, and depending on exhaust gas volumn size, absorber can be 2,3 or multiple stage, and more than 2 and 2 adsorbers parallel run.When certain absorber absorption is saturated, automatic control system sends instruction, closes the import and export switch valve of its correspondence, by this absorber off-line, regenerate, or extracted out, the absorber more renewed, the absorber of extraction concentrates regeneration, now other absorber still work as usual; Open import and export switch valve, after regeneration or new absorber can put into operation, by that analogy.
Further, described cooler is a kind of heat exchanger of air-water form, arranges snakelike metal winding pipe in heat exchanger, or finned bend pipe, walk cooling water in pipe, outside pipe, walk flue gas, regulated the output of cooler by automatic control system, control flue gas cool-down amplitude.The effect of cooler has three, and one is reduce flue-gas temperature, is conducive to improving adsorption effect; Two is prevent flue-gas temperature too high, and active carbon catches fire; Three is UTILIZATION OF VESIDUAL HEAT IN.
Further, described switch valve can be electrically operated valve, also can be operated pneumatic valve or the valve that surges.
Further, described NH 3injector is arranged on sack cleaner import department, and its structure has nozzle type (point sprays), playpipe (line injection) or sprays the forms such as grid (face injection).NH 3as reducing agent, can by a part of NO xbe reduced into N 2and H 2o, remaining NO xabsorber purifies.NH 3emitted dose regulated by automatic control system.
Further, described sack cleaner can be pulse jetting deashing sack cleaner, also can be anti-blow cleaning dust sack cleaner.
The operation principle of furnace flue gas dedusting of the present invention and pernicious gas synergistic purification device is: furnace flue gas enters rear and NH from the air inlet of sack cleaner 3the NH of injector winding-up 3mixing, part NO xbe reduced into N 2and H 2o; Flue gas, again through sock filtration, removes dust granules thing; Flue gas after filtration enters absorber after being lowered the temperature by cooler, removes SO at this 2, NO x, mercury, the multiple pernicious gas such as dioxin, the flue gas after purification is pooled to plenum chamber, finally discharges from exhaust outlet, so far, completes the dedusting of flue gas fine particle and pernicious gas multi-pollutant synergistic purification; When certain absorber absorption is saturated, automatic control system sends instruction, closes the import and export switch valve of its correspondence, by this absorber off-line, carry out regenerating or being extracted out, the absorber more renewed, the absorber extracted out concentrates regeneration, now other absorber still work as usual; NH 3the emitted dose of injector is regulated by automatic control system; Regulated the output of cooler by automatic control system, control flue gas cool-down amplitude; Sack cleaner deashing also sends instruction by automatic control system, and deashing device is started working, and to filter bag ash removal, the dust come off falls into ash bucket, regularly drains.
Beneficial effect of the present invention is: can simultaneously fine particle dust and multiple pernicious gas in purifying smoke, really achieves furnace flue gas multi-pollutant synergistic purification, by sack cleaner, absorber and NH 3injector organic composite becomes set of device, can simplify technological process for flue gas purification, reduces floor space, reduces project investment and operation energy consumption, is applicable to newly-built environmental protection project and environmental transformation project.
Accompanying drawing explanation
Fig. 1 is furnace flue gas dedusting and pernicious gas synergistic purification device elevation.
Fig. 2 is furnace flue gas dedusting and pernicious gas synergistic purification device side view.
In figure: 1. sack cleaner; 2. elbow; 3. cooler; 4. switch valve; 5. absorber; 6. plenum chamber; 7. exhaust outlet; 8.NH 3injector; 9. automatic control system; 10. air inlet; Casing in 11.; 12. upper boxes; 13. ash buckets; 14. filter bags; 15. deashing devices.
Detailed description of the invention
As shown in accompanying drawing 1,2, the furnace flue gas dedusting that the present invention proposes and pernicious gas synergistic purification device can be implemented in the following manner.Concrete installation steps are as follows:
(1), install sack cleaner 1, namely ash bucket 13 is arranged on the below of middle casing 11, and air inlet 10 is arranged on middle casing 11 airintake direction side, installs NH at air inlet 10 place 3injector 8, casing 12 is installed on middle casing 11 top, and filter bag 14 is suspended on the card of upper box 12, arranges deashing device 15 in upper box 12.
(2), absorber 5 is installed, namely successively elbow 2, cooler 3, switch valve 4, absorber 5, switch valve 4, plenum chamber 6, exhaust outlet 7 is installed from top to down at upper box (12) outlet side of sack cleaner 1.
(3), automatic control system 9 is installed, by holding wire and sack cleaner 1, cooler 3, switch valve 4, absorber 5, NH 3injector 8 is connected.
(4), flue gas is connected, with NH after flue gas access to plant 3the NH that injector 8 is jetted 3mixing, part NO xbe reduced into N 2and H 2o; Flue gas filters through filter bag 14 again, removes dust granules thing; Flue gas after filtration enters absorber 5 after being lowered the temperature by cooler 3, removes SO at this 2,, NO x, mercury, the multiple pernicious gas such as dioxin, the flue gas after purification is pooled to plenum chamber 6, finally discharges from exhaust outlet 7, so far, completes the dedusting of flue gas fine particle and pernicious gas multi-pollutant synergistic purification.
(5), when an absorber 5 any in described absorber 5 adsorbs saturated, automatic control system 9 sends instruction, close the import and export switch valve 4 of its correspondence, by this absorber 5 off-line, carry out regenerating or being extracted out, the absorber more renewed, the absorber of extraction concentrates regeneration, now other absorber 5 still work as usual.
(6) NH when, running 3the emitted dose of injector 8 is regulated by automatic control system 9.
(7), to be regulated the cooling water inflow of cooler 3 when running by automatic control system 9, control flue gas cool-down amplitude.
(8), by automatic control system 9 send instruction, ash-cleaner for dust remover 15 is started working, and to filter bag 14 deashing, the dust come off falls into ash bucket 13, regularly drains.

Claims (7)

1. a furnace flue gas dedusting and pernicious gas synergistic purification device, comprise sack cleaner (1), automatic control system (9), sack cleaner (1) comprises air inlet (10), middle casing (11), upper box (12), ash bucket (13), filter bag (14), deashing device (15); Air inlet (10) is arranged on middle casing (11) airintake direction side, casing (12) is installed on middle casing (11) top, filter bag (14) is suspended on the card of upper box (12), deashing device (15) is set in upper box (12), ash bucket (13) is arranged on the below of middle casing (11), it is characterized in that setting gradually elbow (2), cooler (3), switch valve (4), absorber (5), plenum chamber (6), exhaust outlet (7) from top to down at the outlet side of upper box (12); Air inlet (10) place is provided with NH 3injector (8); By Flange joint or welding between elbow (2) after upper box (12) outlet, cooler (3), switch valve (4), absorber (5), plenum chamber (6), exhaust outlet (7), automatic control system (9) is by holding wire and sack cleaner (1), cooler (3), switch valve (4), absorber (5), NH 3injector (8) is connected.
2. a kind of furnace flue gas dedusting and pernicious gas synergistic purification device according to claim 1, it is characterized in that being provided with adsorbent in absorber (5), adsorbent is active carbon, NACF, molecular sieve or zeolite.
3. a kind of furnace flue gas dedusting and pernicious gas synergistic purification device according to claim 1, is characterized in that the magnitude setting of absorber (5) is more than or equal to 1, and more than 2 and 2 absorbers (5) are in parallel.
4. a kind of furnace flue gas dedusting and pernicious gas synergistic purification device according to claim 1, is characterized in that cooler (3) is a kind of heat exchanger of air-water form.
5. a kind of furnace flue gas dedusting and pernicious gas synergistic purification device according to claim 1, is characterized in that switch valve (4) is electrically operated valve, operated pneumatic valve or the valve that surges.
6. a kind of furnace flue gas dedusting and pernicious gas synergistic purification device according to claim 1, is characterized in that NH 3the structure of injector (8) is shower nozzle, playpipe or injection grid form.
7. a kind of furnace flue gas dedusting and pernicious gas synergistic purification device according to claim 1, is characterized in that sack cleaner (1) is pulse jetting deashing sack cleaner, or anti-blow cleaning dust sack cleaner.
CN201510556668.9A 2015-09-06 2015-09-06 Furnace flue gas dedusting and pernicious gas synergistic purification device Active CN105169910B (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107744672A (en) * 2017-11-15 2018-03-02 农业部规划设计研究院 A kind of TSP VOCs integrations removing means and method
CN108671698A (en) * 2018-05-13 2018-10-19 湖南钜晟环保科技工程有限公司 A kind of exhaust gas adsorption box
WO2018218920A1 (en) * 2017-05-27 2018-12-06 盐城市兰丰环境工程科技有限公司 Dust remover capable of desulfuration and denitration

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CN204933225U (en) * 2015-09-06 2016-01-06 中钢集团天澄环保科技股份有限公司 Furnace flue gas dedusting and pernicious gas synergistic purification device

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CN201391882Y (en) * 2009-03-10 2010-01-27 上海融新能源环境科技有限公司 Dry flue gas treatment system for waste incineration
CN201582917U (en) * 2009-10-30 2010-09-15 郭明池 Air purifier
CN102008888A (en) * 2010-11-25 2011-04-13 宁波大学 Incineration flue gas purification device
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CN203017939U (en) * 2012-12-18 2013-06-26 中冶焦耐工程技术有限公司 Integrated device carrying out multi-purification on sticky substance dust containing tar and the like
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018218920A1 (en) * 2017-05-27 2018-12-06 盐城市兰丰环境工程科技有限公司 Dust remover capable of desulfuration and denitration
CN107744672A (en) * 2017-11-15 2018-03-02 农业部规划设计研究院 A kind of TSP VOCs integrations removing means and method
CN108671698A (en) * 2018-05-13 2018-10-19 湖南钜晟环保科技工程有限公司 A kind of exhaust gas adsorption box

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