CN207654927U - A kind of coke oven flue gas desulfurization and dedusting denitration coprocessing system - Google Patents

A kind of coke oven flue gas desulfurization and dedusting denitration coprocessing system Download PDF

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Publication number
CN207654927U
CN207654927U CN201721665449.5U CN201721665449U CN207654927U CN 207654927 U CN207654927 U CN 207654927U CN 201721665449 U CN201721665449 U CN 201721665449U CN 207654927 U CN207654927 U CN 207654927U
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China
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coke oven
flue
flue gas
denitration
desulfurization
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CN201721665449.5U
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常治铁
周航
张庆文
刘莉
吴昊
李修梅
张鹏
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ANHUI WEIDA ENVIRONMENTAL PROTECTION TECHNOLOGY Co Ltd
Anshan Iron And Steel (shanghai) Environmental Engineering Technology Co Ltd
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ANHUI WEIDA ENVIRONMENTAL PROTECTION TECHNOLOGY Co Ltd
Anshan Iron And Steel (shanghai) Environmental Engineering Technology Co Ltd
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Abstract

The utility model is related to a kind of coke oven flue gas desulfurization and dedusting denitration coprocessing system, including system flue and the dry desulfurization device, bag filter, SCR denitration device and the booster fan that are successively set on along coke oven flue gas flow direction on system flue;The both ends of the system flue are respectively communicated with the underground flue collector between coke oven and coke oven chimney, and set inlet baffle valve on the system flue of coke oven side, and a mouthful flapper valve is set out on the system flue of coke oven chimney side;Dry desulfurization device is made of desulfurizing agent warehouse, selection by winnowing graded mill and wind turbine;SCR denitration device includes ammonia-spraying grid, static mixer, flue gas flow equalizing device and SCR reactors.The utility model carries out high-efficient purification processing for coke oven flue gas feature, has that desulfurization and dedusting denitration efficiency is high, simple in structure, operation and maintenance are easy, floor space is small, the few feature of equipment investment.

Description

A kind of coke oven flue gas desulfurization and dedusting denitration coprocessing system
Technical field
The utility model is related to cock-oven gas purifying technical field more particularly to a kind of dry desulfurization, high-efficiency cloth bag are removed The coke oven flue gas desulfurization and dedusting denitration coprocessing system that dirt and selective-catalytic-reduction denitrified technique are organically blent.
Background technology
In recent years, in order to renovate the air environmental pollutions such as haze, acid rain, gradually stringent control every profession and trade pollutant is arranged for country It puts.From 1 day January in 2015, existing coal chemical enterprise started strict implement《Coking chemistry emission of industrial pollutants standard》(GB Emission limit specified in 16171-2012) has made following strict regulations to general regional coke oven chimney smoke discharge: Grain object concentration of emission is less than or equal to 30mg/m3, machine coke sulfur dioxide emissioning concentration is less than or equal to 50mg/m3, machine coke nitrogen oxides row It puts concentration and is less than or equal to 500mg/m3.It is executed according to national environmental protection job requirement and to key area《Coking chemistry industrial pollution Object discharge standard》Special emission limit specified in (GB 16171-2012):Granular material discharged concentration is less than or equal to 15mg/m3, Machine coke sulfur dioxide emissioning concentration is less than or equal to 30mg/m3, machine coke discharged nitrous oxides concentration is less than or equal to 150mg/m3.With Environmental protection standard and law enforcement are further stringent, and flue gases of cock oven pollutant control is extremely urgent.
In order to solve coke oven flue gas problem of environmental pollution, the utility model proposes a kind of new desulfurization and dedusting denitration technology, It is integrated dry desulfurization, high-effective dust-removing, selective-catalytic-reduction denitrified in one, form " SDS desulfurization by dry method (solvay Dry solution)+high-efficiency cloth bag dedusting+SCR denitration " technique, realize efficient desulfurizing and dust collecting denitration, meet newest pollution Object discharge standard.
Invention content
The utility model provides a kind of coke oven flue gas desulfurization and dedusting denitration coprocessing system, for coke oven flue gas feature High-efficient purification processing is carried out, has that desulfurization and dedusting denitration efficiency is high, simple in structure, operation and maintenance are easy, floor space is small, equipment The characteristics of small investment.
In order to achieve the above object, the utility model is realized using following technical scheme:
A kind of coke oven flue gas desulfurization and dedusting denitration coprocessing system, including system flue and along coke oven flue gas flow direction Dry desulfurization device, bag filter, SCR denitration device and the booster fan being successively set on system flue;The system The both ends of flue are respectively communicated with the underground flue collector between coke oven and coke oven chimney, and are set on the system flue of coke oven side Inlet baffle valve sets out a mouthful flapper valve on the system flue of coke oven chimney side;Dry desulfurization device by desulfurizing agent warehouse, Selection by winnowing graded mill and wind turbine composition, desulfurizing agent warehouse connect system flue, desulfurizing agent delivery pipe by desulfurizing agent conveyance conduit Selection by winnowing graded mill and wind turbine are set on road;SCR denitration device includes ammonia-spraying grid, static mixer, flue gas flow equalizing device and SCR anti- Answer device, ammonia-spraying grid, static mixer and flue gas flow equalizing device along coke oven flue gas flow direction be successively set on SCR reactors into On mouth pipeline;In addition ammonia-spraying grid is connect with ammonia conveying device, low temperature catalyst is loaded in SCR reactors, and set catalyst Thermal analysis apparatus.
Underground flue collector between the initial and end both ends of the system flue sets bypass as bypass flue on bypass flue Flapper valve;The initial and end both ends of system flue are connected on flue by being connected to flue connection and set fast cut valve.The wind turbine upstream It is additionally provided with outsourcing desulfurizing agent on desulfurizing agent conveyance conduit, mouth is added.
The filter bag of the bag filter uses corrosion-and high-temp-resistant filtrate.
Compared with prior art, the utility model has the beneficial effects that:
1) dry desulfurization is used, reaction efficiency is very high, and discharge rate excessively is seldom, the SO after processing in coke oven flue gas2It can reach Undetectable discharge capacity can effectively inhibit denitrating catalyst caused by ammonium hydrogen sulfate to be poisoned;
2) system structure is simple, investment cost is few, running resistance is low, convenient operating maintenance;
3) without water consume, whole system is not necessarily to preservative treatment, and smoke temperature drop is small, energy saving, is more suitable for having the hot standby demand of chimney Coke oven production system uses.
Description of the drawings
Fig. 1 is a kind of structural schematic diagram of coke oven flue gas desulfurization and dedusting denitration coprocessing system described in the utility model.
In figure:1. 31. desulfurizing agent warehouse of coke oven 2. coke oven chimney, 3. dry desulfurization device, 32. selection by winnowing graded mill 33. 4. 51. ammonia conveying device of bag filter 5.SCR denitrification apparatus of wind turbine, 52. catalyst thermal analysis apparatus 6. is pressurized 10. exit catch plate valve of wind turbine 7. system flue, 8. by-pass damper valve, 9. inlet baffle valve, 11. fast cut valve
Specific implementation mode
Specific embodiment of the present utility model is described further below in conjunction with the accompanying drawings:
As shown in Figure 1, a kind of coke oven flue gas desulfurization and dedusting denitration coprocessing system described in the utility model, including system Flue 7 and dry desulfurization device 3, bag filter 4, the SCR being successively set on along coke oven flue gas flow direction on system flue 7 Denitrification apparatus 5 and booster fan 6;The both ends of the system flue 7 are respectively communicated with the Main Underground between coke oven 1 and coke oven chimney 2 Flue, and inlet baffle valve 9 is set on the system flue 7 of 1 side of coke oven, on the system flue 7 of 2 side of coke oven chimney Set out mouthful flapper valve 10;Dry desulfurization device 3 is made of desulfurizing agent warehouse 31, selection by winnowing graded mill 32 and wind turbine 33, desulfurizing agent Warehouse 31 connects system flue 7 by desulfurizing agent conveyance conduit, and sorting classifying grinding machine 32 and wind turbine are set on desulfurizing agent conveyance conduit 33;SCR denitration device 5 includes ammonia-spraying grid, static mixer, flue gas flow equalizing device and SCR reactors, and ammonia-spraying grid, static state are mixed Clutch and flue gas flow equalizing device are along the inlet pipeline that coke oven flue gas flow direction is successively set on SCR reactors;Ammonia-spraying grid is another It is connect outside with ammonia conveying device 51, low temperature catalyst is loaded in SCR reactors, and set catalyst thermal analysis apparatus 52.
Underground flue collector between the initial and end both ends of the system flue 7 sets bypass as bypass flue on bypass flue Flapper valve 8;The initial and end both ends of system flue 7 are connected on flue by being connected to flue connection and set fast cut valve 11.
It is additionally provided with outsourcing desulfurizing agent on the desulfurizing agent conveyance conduit of 33 upstream of the wind turbine, mouth is added.
The filter bag of the bag filter 4 uses corrosion-and high-temp-resistant filtrate.
Ripe flue gas desulfurization technique includes wet method, semidry method and dry method at present.It is needed for coke oven production, coke oven chimney Hot standby state must be kept, and temperature must not be less than 135 DEG C.Therefore from the selection of desulfurization technology, Wet technique should not be used. And dry technique system temperature drop is minimum, meets above-mentioned condition requirement well, is the effective of solution coke oven flue gas desulfurization demand Means.
The characteristics of coke oven flue gas is that generally relatively low containing sulfur dioxide, nitrogen oxides is higher.Therefore denitrating technique selection compared with To be important, coke oven flue gas temperature range is 160~300 DEG C, less than conventional scr (selectively urging reduction method) denitrating catalyst Reaction temperature window (320~420 DEG C).Therefore, how nitrogen oxides in middle low temperature scope effectively removes coke oven flue gas is outstanding It is important.Relative to coke oven flue gas exhaust temperature, conventional high-temperature denitration window temperature is too high, if to be warming up to 300 DEG C or more Energy consumption is excessive, and low-temperature denitration technology is more reasonable in.
In order to achieve the purpose that efficient desulfurizing and dust collecting denitration, while meeting the hot standby demand of coke oven chimney, take into account energy-saving effect, The utility model uses " SDS desulfurization by dry method (solvay dry solution)+high-efficiency cloth bag dedusting+middle cryogenic selective The process of catalytic reduction method denitration (SCR) ".
Coke oven flue gas is carried out using a kind of coke oven flue gas desulfurization and dedusting denitration coprocessing system described in the utility model The technique of purified treatment is to draw coke oven flue gas into the system flue 7 of flue gas purification system by underground flue collector, successively Purified treatment is carried out to coke oven flue gas by dry desulfurization device 3, bag filter 4 and SCR denitration device 5, it is burnt that treated Kiln gas introduces coke oven chimney 2 and discharges;Specifically comprise the following steps:
1) dry desulfurization;
Using dry desulfurizing process, solid SDS desulfurizing agents are injected directly into system flue 7, SDS desulfurizing agents and coke oven SO in flue gas2Physics and chemical reaction occurs, effectively removes the SO in coke oven flue gas2
2) bag-type dust;
Bag filter 4 is set on the system flue 7 after dry desulfurization, absorbs SO2Dryness powder afterwards is with coke oven cigarette Gas enters bag filter 4, further carries out realizing clarifying smoke while desulphurization reaction, it is ensured that dust being capable of minimum discharge; The filter bag of bag filter 4 selects corrosion-and high-temp-resistant filtrate;
3) SCR denitration;
SCR denitration device 5 is set on system flue 7 after bag filter 4, low-temperature selective catalytic reduction is de- in Nitre technique, while selecting ammonia as the reducing agent of coke oven flue gas denitration;
First, it is sprayed by the coke oven flue gas of desulfurization and dedusting and the ammonia-spraying grid being arranged in SCR Reactor inlet pipelines The ammonia come is sufficiently mixed in static mixer, and the flue gas mixed enters from SCR Reactor inlets, equal by flue gas Stream device is flowed homogeneous to flue gas, and is filtered to sticky particle object (tar, ammonium hydrogen sulfate etc.), to prevent sticky particle object Being deposited on the low temperature catalyst surface in downstream makes catalyst activity reduce or block, while flue gas flow equalizing device also disassembling cleaning, It recycles to investment reduction;
Coke oven flue gas enters SCR reactors after flue gas flow equalizing device, and carrying out SCR denitration with low temperature catalyst reacts, and takes off Except the flue gas after NOx flows to 2 direct emission of coke oven chimney from SCR reactor outlets.
In dry desulfurizing process, for desulfurizing agent without humidifying processing, whole system temperature drop is low, is not required to arrange using additional anti-corrosion It applies;Due to facilities such as no desulfurizing tower, slurries system, fluid beds, take up an area and save, small investment is safeguarded simple and convenient.Desulfurizing agent can Using the method being milled online, conventional flowsheet is:Desulfurizing agent-opens bag station-desulfurizing agent warehouse-spiral weighing balance- Neat stress after selection by winnowing graded mill-nozzle-sulfur-bearing coke oven flue gas-desulfurization.Also the desulfurizing agent that buyable granularity is met the requirements, Mouth is added from outsourcing desulfurizing agent to be added directly into desulfurizing agent conveyance conduit, is blown into system flue by wind turbine and coke oven flue gas It is reacted.
The technological process of middle low-temperature selective catalytic reduction method denitration is:Ammonia-ammonia-spraying grid sprays-contains nitre coke oven cigarette Neat stress after gas-static mixer-flue gas flow equalizing device-SCR reactors-denitration.
By-pass damper valve 8 is set on bypass flue, it is ensured that the normal production of coke oven 1 is not influenced, at desulfurization and dedusting denitration collaboration The flue gas emission of reason system has contemplated that hot standby condition, even if system is stopped transport suddenly, will not influence coke oven production.In Main Underground cigarette Fast cut valve 11 is added on road, is met the reasons such as power failure and is caused 6 failure of booster fan that cannot normally be handled to desulfurization and dedusting denitration collaboration When system discharges coke oven flue gas, it can be quickly switched into the discharge of coke oven chimney 2, while coke oven is cut off by chain control in time and is added Heating gas, it is ensured that production safety.
The preferable specific implementation mode of the above, only the utility model, but the scope of protection of the utility model is not Be confined to this, any one skilled in the art within the technical scope disclosed by the utility model, according to this practicality Novel technical solution and its utility model design are subject to equivalent substitution or change, should all cover the protection model in the utility model Within enclosing.

Claims (4)

1. a kind of coke oven flue gas desulfurization and dedusting denitration coprocessing system, which is characterized in that including system flue and along coke oven cigarette Flow of air direction is successively set on dry desulfurization device, bag filter, SCR denitration device and supercharging wind on system flue Machine;The both ends of the system flue are respectively communicated with the underground flue collector between coke oven and coke oven chimney, and close to coke oven side Inlet baffle valve is set on system flue, and a mouthful flapper valve is set out on the system flue of coke oven chimney side;Dry desulfurization device It being made of desulfurizing agent warehouse, selection by winnowing graded mill and wind turbine, desulfurizing agent warehouse connects system flue by desulfurizing agent conveyance conduit, Selection by winnowing graded mill and wind turbine are set on desulfurizing agent conveyance conduit;SCR denitration device includes ammonia-spraying grid, static mixer, flue gas Current equalizer and SCR reactors, ammonia-spraying grid, static mixer and flue gas flow equalizing device are successively set on along coke oven flue gas flow direction On the inlet pipeline of SCR reactors;In addition ammonia-spraying grid is connect with ammonia conveying device, filling is low-temperature catalyzed in SCR reactors Agent, and set catalyst thermal analysis apparatus.
2. a kind of coke oven flue gas desulfurization and dedusting denitration coprocessing system according to claim 1, which is characterized in that described Underground flue collector between the initial and end both ends of system flue sets by-pass damper valve as bypass flue on bypass flue;System cigarette The initial and end both ends in road are connected on flue by being connected to flue connection and set fast cut valve.
3. a kind of coke oven flue gas desulfurization and dedusting denitration coprocessing system according to claim 1, which is characterized in that described It is additionally provided with outsourcing desulfurizing agent on the desulfurizing agent conveyance conduit of wind turbine upstream, mouth is added.
4. a kind of coke oven flue gas desulfurization and dedusting denitration coprocessing system according to claim 1, which is characterized in that described The filter bag of bag filter uses corrosion-and high-temp-resistant filtrate.
CN201721665449.5U 2017-12-04 2017-12-04 A kind of coke oven flue gas desulfurization and dedusting denitration coprocessing system Active CN207654927U (en)

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109059568A (en) * 2018-08-22 2018-12-21 上海宝钢节能环保技术有限公司 A kind of coke oven flue air purifying apparatus bypass valve system
CN109482049A (en) * 2019-01-02 2019-03-19 武汉科林精细化工有限公司 A kind of coke oven flue gas dry desulfurization denitration purification integral process
CN109812829A (en) * 2019-03-21 2019-05-28 河北视窗玻璃有限公司 A kind of flue gas processing device and boiler system
CN110841416A (en) * 2019-12-18 2020-02-28 中冶焦耐(大连)工程技术有限公司 Dedusting, desulfurization, denitrification and purification system and process for flue gas of rotary kiln and shaft kiln
CN112516772A (en) * 2020-12-18 2021-03-19 中冶焦耐(大连)工程技术有限公司 Crude benzene tube furnace tail gas cleaning system and process
CN113698945A (en) * 2021-10-19 2021-11-26 云南煤业能源股份有限公司 Method for starting desulfurization and denitrification draught fan without stopping heating of coke oven
CN114405265A (en) * 2021-12-31 2022-04-29 新兴铸管股份有限公司 Coke oven flue desulfurization and denitrification system

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109059568A (en) * 2018-08-22 2018-12-21 上海宝钢节能环保技术有限公司 A kind of coke oven flue air purifying apparatus bypass valve system
CN109482049A (en) * 2019-01-02 2019-03-19 武汉科林精细化工有限公司 A kind of coke oven flue gas dry desulfurization denitration purification integral process
CN109482049B (en) * 2019-01-02 2021-07-23 武汉科林化工集团有限公司 Dry desulfurization, denitrification and purification integrated process for coke oven flue gas
CN109812829A (en) * 2019-03-21 2019-05-28 河北视窗玻璃有限公司 A kind of flue gas processing device and boiler system
CN110841416A (en) * 2019-12-18 2020-02-28 中冶焦耐(大连)工程技术有限公司 Dedusting, desulfurization, denitrification and purification system and process for flue gas of rotary kiln and shaft kiln
CN112516772A (en) * 2020-12-18 2021-03-19 中冶焦耐(大连)工程技术有限公司 Crude benzene tube furnace tail gas cleaning system and process
CN113698945A (en) * 2021-10-19 2021-11-26 云南煤业能源股份有限公司 Method for starting desulfurization and denitrification draught fan without stopping heating of coke oven
CN113698945B (en) * 2021-10-19 2024-04-26 云南煤业能源股份有限公司 Method for starting desulfurization and denitrification induced draft fan without stopping heating of coke oven
CN114405265A (en) * 2021-12-31 2022-04-29 新兴铸管股份有限公司 Coke oven flue desulfurization and denitrification system

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