CN203507793U - Device for simultaneously removing sulfur dioxide and nitrogen oxide from coke oven flue gas - Google Patents

Device for simultaneously removing sulfur dioxide and nitrogen oxide from coke oven flue gas Download PDF

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Publication number
CN203507793U
CN203507793U CN201320699784.2U CN201320699784U CN203507793U CN 203507793 U CN203507793 U CN 203507793U CN 201320699784 U CN201320699784 U CN 201320699784U CN 203507793 U CN203507793 U CN 203507793U
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CN
China
Prior art keywords
reaction tower
communicated
coke oven
flue gas
nitrogen oxide
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CN201320699784.2U
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Chinese (zh)
Inventor
郑光明
苏龙龙
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安徽同兴环保工程股份有限公司
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    • Y02A50/2344
    • Y02A50/2349

Abstract

The utility model discloses a device for simultaneously removing sulfur dioxide and nitrogen oxide from coke oven flue gas. The device is provided with a reaction tower, wherein the lower part of the reaction tower is provided with a flue gas inlet communicated with coke oven flue gas; the reaction tower under the flue gas inlet is internally provided with an ammonium hydroxide slurry pond, the ammonium hydroxide slurry pond is communicated with an oxidation air blower and an air filter outside the reaction tower; the bottom slurry outlet of the slurry pond is connected with a ammonium salt discharge pump communicated with an ammonium salt recovery system; an ammonium hydroxide spraying desulfurization tube, an ozone spraying grid, an ammonium hydroxide spraying denitration tube and a demisting region are orderly arranged from bottom to top in the reaction tower above the flue gas inlet, and a flue gas outlet at the top end of the reaction tower is connected with a draught fan communicated with a chimney. The device can effectively improve the desulfurization and denitration efficiency of flue gas and the utilization rate of desulfurization and denitration absorbent, moreover, compared with a SCR(Selective Catalytic Reduction)/SNCR (selective non-catalytic reduction) denitration device frequently used in coal power plants, the device has low cost of construction, and the product of desulfurization and denitration is recyclable ammonium salt.

Description

A kind of while removes the device of sulfur dioxide and nitrogen oxide from coke oven flue waste gas

Technical field:

The utility model relates to a kind of while and from coke oven flue waste gas, removes the device of sulfur dioxide and nitrogen oxide, belongs to coke oven air pollution control technique field.

Background technology:

Coke is a main by-product of coal conversion, is mainly used in blast furnace ironmaking, plays reducing agent, exothermic mixture and stock column skeleton function, is the important raw material of steel and iron industry.

Coke is that coal heats in carbonization chamber in coke furnace under the condition of isolated air, and the complex process of the variation of process series of physical and chemical reaction forms.The coke-stove gas producing in coke retort process contains the pollutants such as sulfur dioxide and nitrogen oxide, in follow-up use procedure, can produce new pollution.These sulfur dioxide and nitrogen oxide are the important composition compositions of PM2.5 particle, are also the main causes that forms acid rain, haze etc.Its mechanism of production is: the thermal source of carbonizing chamber is provided by a certain proportion of coke-stove gas and BF gas heating flue, and the waste gas that heating gas is produced is called coking furnace discharge gas; And in coal gas, contain a certain amount of H 2s sulfides, generates SO after burning 2, coal gas and air, when coke oven vertical flame path burns, generate nitrogen oxide NOx (having three kinds of temperature heating power type, hydrocarbon fuel Quick-type and nitrogen component fuel types).At present, the sulfur dioxide of China's coking furnace discharge gas and nitrogen oxide are not taked reduction of discharging measure, detect the SO that domestic existing coke oven discharges according to environmental administration 2mostly can not meet the < < coking chemistry emission of industrial pollutants standard > > of national up-to-date appearance with the concentration of NOx.And new < < standard > > rose on January 1st, 2015, to SO 2require higher with the concentration of emission of NOx.Therefore, the transformation of coke oven desulphurization denitration is urgent task of control atmosphere pollution, and the research to coking furnace discharge gas desulphurization denitration technology, has extremely profound significance.

Summary of the invention:

For overcoming the defect of prior art, the purpose of this utility model is to provide a kind of while from coke oven flue waste gas, to remove the device of sulfur dioxide and nitrogen oxide, adopt this device can effectively improve the desulphurization and denitration efficiency of flue gas and the utilization rate of desulphurization denitration absorbent, and it is cheap that this device is compared the conventional SCR/SNCR denitrification apparatus cost of thermal power plant, the ammonium salt that desulphurization denitration product is recoverable.

The utility model technical solution problem adopts following technical scheme:

While removes a device for sulfur dioxide and nitrogen oxide from coke oven flue waste gas, and reaction tower is set, and the bottom of described reaction tower is provided with the gas approach being communicated with coke oven flue waste gas;

In reaction tower below described gas approach, be provided with ammoniacal liquor slurry pool, described ammoniacal liquor slurry pool is communicated with oxidation fan, the air cleaner of reaction tower outside; The bottom grout outlet of described slurry pool is connected with ammonium salt excavationg pump and ammonium salt reclamation system connectivity;

In reaction tower above described gas approach, be provided with successively ammonia spray desulfurization pipe, spray ozone grid, ammonia spray denitration pipe from bottom to top and remove fog-zone, the exhanst gas outlet on reaction tower top is connected with air-introduced machine and is communicated with chimney.

The aqua ammonia pump that is externally connected to of described ammoniacal liquor slurry pool is communicated with ammoniacal liquor storage tank.

Described spray ozone grid is communicated with the ozone generator of reaction tower outside.

Respectively hang oneself pipeline, ammonia circulation pump of described ammonia spray desulfurization pipe, ammonia spray denitration pipe is communicated with described ammoniacal liquor slurry pool.

The described fog-zone of removing comprises the flooding nozzle of being located in reaction tower, and described flooding nozzle is communicated with mist eliminator flushing pump, the flush box of reaction tower outside; In reaction tower above described flooding nozzle, be provided with demister grid.

Described reaction tower outside is also provided with stirring system, comprises and is located at the mixing pump of reaction tower outside and is communicated with described mixing pump and the pipeline of described ammoniacal liquor slurry pool.

Stack gases in coke oven flue enters behind absorption tower, and first with ammoniacal liquor reacting generating salt and the part nitrate of desulfurization zone, in flue gas, remaining NO is through ozone inlet zone and ozone reaction generation NO 2.NO 2the mist that content accounts for NOx cumulative volume 50% all by ammonia absorption, is produced nitrate during through denitration district.Mixed solution is delivered to recovery system through ammonium salt excavationg pump, the flue gas after processing after demister demist by chimney discharged to atmosphere.Native system also can arrange multilayer ammonia spray reaction zone.It is oxidant that ammonium salt oxidization enrichment district adopts air, and ammonium nilrite and sulfite oxidation are generated to ammonium salt.

Compared with the prior art, the beneficial effects of the utility model are embodied in:

The utlity model has small investment, energy consumption is low, the advantage that system is simple and reliable, operating cost is low, on-the-spot resource utilization is high, denitrification efficiency is high, desulfuration efficiency is more than 95%, denitration efficiency is more than 80%, and flue gas after treatment meets national coking chemistry emission of industrial pollutants standard completely.

Accessory substance ammonium sulfate, ammonium nitrate can be used as production marketing, and the simple floor space of system architecture is little, and have higher reliability, and system availability can reach more than 98%; Whole system non-wastewater discharge.

Accompanying drawing explanation:

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

Number in the figure: 1, ozone generator, 2, reaction tower, 3, gas approach, 4, aqua ammonia pump, 5, ammonium salt excavationg pump, 6, ammoniacal liquor storage tank, 7, mixing pump, 8, ammonia circulation pump, 9, ammonia spray desulfurization pipe, 10, flush box, 11, mist eliminator flushing pump, 12, ammonia spray denitration pipe, 13, flooding nozzle, 14, demister grid, 15, exhanst gas outlet, 16 spray ozone grids, 17, oxidation fan, 18, air cleaner, 19, air-introduced machine, 20 ammoniacal liquor slurry pools.

Below pass through the specific embodiment, and the utility model is described in further detail by reference to the accompanying drawings.

The specific embodiment:

Embodiment: remove the device of sulfur dioxide and nitrogen oxide in the time of the present embodiment from coke oven flue waste gas, be provided with the gas approach 3 being communicated with coke oven flue waste gas in the bottom of reaction tower 2; In reaction tower below gas approach, be provided with ammoniacal liquor slurry pool 20, this ammoniacal liquor slurry pool is communicated with oxidation fan 17, the air cleaner 18 of reaction tower outside successively; In the bottom of slurry pool, grout outlet is connected with ammonium salt excavationg pump 5, excavationg pump and pipe-line system and ammonium salt reclamation system connectivity.

In reaction tower above gas approach, be provided with successively ammonia spray desulfurization pipe 9, spray ozone grid 16, ammonia spray denitration pipe 12 from bottom to top and remove fog-zone, the exhanst gas outlet 15 on reaction tower top is connected with air-introduced machine 19 and is communicated with chimney.

In specifically arranging, except fog-zone comprises the flooding nozzle 13 of being located in reaction tower, flooding nozzle is communicated with mist eliminator flushing pump 11, the flush box 10 of reaction tower outside; In reaction tower above flooding nozzle 13, be provided with demister grid 14.

The aqua ammonia pump 4 that is externally connected to of ammoniacal liquor slurry pool 20 is communicated with ammoniacal liquor storage tank 6, and the tank used for storing ammonia in the ammoniacal liquor storage tank 6 existing cyclic ammonia water systems in Ke You coke-oven plant provides.

Spray ozone grid 16 is communicated with the ozone generator 1 of reaction tower outside, by it, provides ozone.

Respectively hang oneself pipeline, ammonia circulation pump 8 of ammonia spray desulfurization pipe 9, ammonia spray denitration pipe 12 is communicated with ammoniacal liquor slurry pool 20, and in slurry pool, ammonia circulation is used.In reaction tower outside, be also provided with stirring system, comprise and be located at the mixing pump 7 of reaction tower outside and the pipeline that is communicated with mixing pump and ammoniacal liquor slurry pool.

Adopt said apparatus, the subtractive process of coke oven flue SO 2 in waste gas, nitrogen oxide is as follows:

NO+O 3→NO 2

2NH 3+SO 2+H 2O→(NH) 2SO 3

2(NH 4)SO 3+O 2→(NH 4) 2SO 4

2NH 3+NO+NO 2+H 2O→2NH 4NO 2

NH 4NO 2+O 2→2NH 4NO 3

In work, coke oven flue waste gas enters desulfurization and denitrification reaction tower 2 from reaction tower gas approach 3, and flue gas enters O after the cyclic ammonia water washing of ammonia spray desulfurization pipe 9 sprays 3/ NOx mixed zone, makes NO 2account for 50% left and right of NOx cumulative volume, the ozone that ozone grid 16 sprays is produced by ozone generator 1, and the ammoniacal liquor that ammonia spray desulfurization pipe 9 and ammonia spray denitration pipe 12 spray is provided from 20 suctions of ammoniacal liquor slurry pool by ammonia circulation pump 8.Reacted clean air after 14 demists of demister grid to exhanst gas outlet 15, through air-introduced machine 19 discharged to atmosphere.Wherein except fog-zone comprises flush box 10, mist eliminator flushing pump 11, mist eliminator flushing nozzle 13 and demister grid 14.Reaction tower 3 bottoms are ammonium salt oxidization enrichment district, and this outside, slurries district is established by aqua ammonia pump 4 and connected ammoniacal liquor storage tank 6.The grout outlet of the bottom of slurry pool connects ammonium salt reclamation system, and ammonium salt drains into ammonium salt reclamation system by ammonium salt excavationg pump 5 by ammonium salt.Reaction tower 3 bottoms connect oxidation fan 17 and air cleaners 18, oxidation fan 1) and air cleaner 18 formed accessory substance oxidative system.Tank used for storing ammonia in the ammoniacal liquor storage tank 6 existing cyclic ammonia water systems in Ke You coke-oven plant provides.

Claims (6)

1. the while removes a device for sulfur dioxide and nitrogen oxide from coke oven flue waste gas, it is characterized in that:
Reaction tower (2) is set, and the bottom of described reaction tower (2) is provided with the gas approach (3) being communicated with coke oven flue waste gas;
In reaction tower below described gas approach, be provided with ammoniacal liquor slurry pool (20), described ammoniacal liquor slurry pool is communicated with oxidation fan (17), the air cleaner (18) of reaction tower outside; The bottom grout outlet of described slurry pool is connected with ammonium salt excavationg pump (5) and ammonium salt reclamation system connectivity;
In reaction tower above described gas approach, be provided with successively ammonia spray desulfurization pipe (9), spray ozone grid (16), ammonia spray denitration pipe (12) from bottom to top and remove fog-zone, the exhanst gas outlet on reaction tower top (15) is connected with air-introduced machine (19) and is communicated with chimney.
2. a kind of while according to claim 1 removes the device of sulfur dioxide and nitrogen oxide from coke oven flue waste gas, it is characterized in that, the aqua ammonia pump (4) that is externally connected to of described ammoniacal liquor slurry pool (20) is communicated with ammoniacal liquor storage tank (6).
3. a kind of while according to claim 1 removes the device of sulfur dioxide and nitrogen oxide from coke oven flue waste gas, it is characterized in that, described spray ozone grid (16) is communicated with the ozone generator (1) of reaction tower outside.
4. a kind of while according to claim 1 removes the device of sulfur dioxide and nitrogen oxide from coke oven flue waste gas, it is characterized in that, respectively hang oneself pipeline, ammonia circulation pump (8) of described ammonia spray desulfurization pipe (9), ammonia spray denitration pipe (12) is communicated with described ammoniacal liquor slurry pool (20).
5. a kind of while according to claim 1 removes the device of sulfur dioxide and nitrogen oxide from coke oven flue waste gas, it is characterized in that, the described fog-zone of removing comprises the flooding nozzle (13) of being located in reaction tower, and described flooding nozzle is communicated with mist eliminator flushing pump (11), the flush box (10) of reaction tower outside; In the reaction tower of described flooding nozzle (13) top, be provided with demister grid (14).
6. a kind of while according to claim 1 removes the device of sulfur dioxide and nitrogen oxide from coke oven flue waste gas, it is characterized in that, described reaction tower outside is also provided with stirring system, comprises and is located at the mixing pump (7) of reaction tower outside and is communicated with described mixing pump and the pipeline of described ammoniacal liquor slurry pool.
CN201320699784.2U 2013-11-06 2013-11-06 Device for simultaneously removing sulfur dioxide and nitrogen oxide from coke oven flue gas CN203507793U (en)

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104014229A (en) * 2014-06-20 2014-09-03 北京中冶隆生环保科技发展有限公司 Device for simultaneously desulfurizing and denitrating smoke gas through multi-stage turbocharging turbulence wet process and application method
CN104524935A (en) * 2014-11-28 2015-04-22 浙江工商大学 Single-tower type double-circulation sprinkling composite absorption device and method
CN104772013A (en) * 2015-03-31 2015-07-15 刘艳 Method and device for stage purification waste gas with use of ozone
CN104857834A (en) * 2015-06-05 2015-08-26 北京中晶佳镁环境科技股份有限公司 Fume denitration device and method based on ozone
CN104923044A (en) * 2015-06-05 2015-09-23 北京中晶佳镁环境科技股份有限公司 Ozone-based flue gas treatment system and method
CN104941430A (en) * 2015-06-05 2015-09-30 北京中晶佳镁环境科技股份有限公司 Flue gas denitration device and method
CN104941414A (en) * 2015-06-05 2015-09-30 北京中晶佳镁环境科技股份有限公司 Ozone-based smoke gas treatment device and method
CN104959013A (en) * 2015-06-05 2015-10-07 北京中晶佳镁环境科技股份有限公司 Dedusting flue gas treating apparatus and method
CN104959010A (en) * 2015-06-05 2015-10-07 北京中晶佳镁环境科技股份有限公司 Desulphurization and denitration apparatus and method based on ozone
CN105413433A (en) * 2015-12-24 2016-03-23 齐琏发 System for treating coke oven exhausted contaminants
CN105833686A (en) * 2016-03-23 2016-08-10 凯天环保科技股份有限公司 Fume nitrogen and sulfur resource utilization method and device thereof
CN105833693A (en) * 2016-06-07 2016-08-10 南通天蓝环保能源成套设备有限公司 Device for serial desulfurization and denitrification with limestone-gypsum process and SCR (selective catalytic reduction) process
CN107308812A (en) * 2017-08-03 2017-11-03 北京长信太和节能科技有限公司 The system and method for low temperature organic catalysis oxidizing and denitrating ozone

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104014229A (en) * 2014-06-20 2014-09-03 北京中冶隆生环保科技发展有限公司 Device for simultaneously desulfurizing and denitrating smoke gas through multi-stage turbocharging turbulence wet process and application method
CN104524935A (en) * 2014-11-28 2015-04-22 浙江工商大学 Single-tower type double-circulation sprinkling composite absorption device and method
CN104772013A (en) * 2015-03-31 2015-07-15 刘艳 Method and device for stage purification waste gas with use of ozone
CN104772013B (en) * 2015-03-31 2017-07-28 刘艳 A kind of method and device that purifies waste gas stage by stage of utilization ozone
CN104959013A (en) * 2015-06-05 2015-10-07 北京中晶佳镁环境科技股份有限公司 Dedusting flue gas treating apparatus and method
CN104941430A (en) * 2015-06-05 2015-09-30 北京中晶佳镁环境科技股份有限公司 Flue gas denitration device and method
CN104941414A (en) * 2015-06-05 2015-09-30 北京中晶佳镁环境科技股份有限公司 Ozone-based smoke gas treatment device and method
CN104923044A (en) * 2015-06-05 2015-09-23 北京中晶佳镁环境科技股份有限公司 Ozone-based flue gas treatment system and method
CN104959010A (en) * 2015-06-05 2015-10-07 北京中晶佳镁环境科技股份有限公司 Desulphurization and denitration apparatus and method based on ozone
CN104857834A (en) * 2015-06-05 2015-08-26 北京中晶佳镁环境科技股份有限公司 Fume denitration device and method based on ozone
CN104857834B (en) * 2015-06-05 2017-03-08 北京中晶环境科技股份有限公司 Equipment for denitrifying flue gas based on ozone and method
CN105413433A (en) * 2015-12-24 2016-03-23 齐琏发 System for treating coke oven exhausted contaminants
CN105833686A (en) * 2016-03-23 2016-08-10 凯天环保科技股份有限公司 Fume nitrogen and sulfur resource utilization method and device thereof
CN105833693A (en) * 2016-06-07 2016-08-10 南通天蓝环保能源成套设备有限公司 Device for serial desulfurization and denitrification with limestone-gypsum process and SCR (selective catalytic reduction) process
CN107308812A (en) * 2017-08-03 2017-11-03 北京长信太和节能科技有限公司 The system and method for low temperature organic catalysis oxidizing and denitrating ozone

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CP03 Change of name, title or address

Address after: 238000 Anhui city of Ma'anshan province Hanshan County Qingxi Industrial Park

Patentee after: Tongxing environmental Polytron Technologies Inc

Address before: 238000 Nanfeng commercial building, Chaohu City, Hefei, Anhui Province, 8 Building

Patentee before: Anhui Tongxing Environmental Protection Engineering Co.,Ltd.

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