CN205832956U - A kind of coke oven low-sulfur tail gas wet method desulfurization reduces soluble dust exhaust system - Google Patents
A kind of coke oven low-sulfur tail gas wet method desulfurization reduces soluble dust exhaust system Download PDFInfo
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Abstract
The utility model discloses a kind of coke oven low-sulfur tail gas wet method desulfurization and reduce soluble dust exhaust system: include desulfuration absorbing tower and be located at the blood circulation outside described desulfuration absorbing tower；Be provided with gas approach in the middle and lower part of desulfurizing tower, in the desulfurizing tower above described gas approach, be sequentially provided with from bottom to top spray-absorption district, water wash system, except mist foam-removing system, tower top is provided with chimney；The blood circulation of described outside and described spray-absorption district, water washing device, except being provided with pipeline connection between mist foam-removing system.Described water wash system has: be sequentially arranged in the gas-liquid dividing plate above described spray-absorption district, Venturi rod layer, the first wash spray floor, the second wash spray floor.The cooling that can be realized flue gas by this device is washed and SO2The removing of dust, reaches minimum discharge requirement, SO2Concentration is less than 30mg/Nm3, dust concentration is less than 15mg/Nm3。
Description
Technical field:
This utility model relates to a kind of coke oven low-sulfur tail gas wet method desulfurization and reduces soluble dust exhaust system.
Background technology:
China is iron and steel big producing country and Coal Chemical Industry big producing country, and the existing coke oven of China more than 2000, due to coke oven tail gas
Middle SO2Concentration is the highest, generally at 500mg/Nm3Hereinafter, " the coking chemistry emission of industrial pollutants issued for 2012 according to country
Standard " GB16171 2012, cannot meet environmental requirement.
Existing wet desulfurizing process mainly has limestone-gypsum method, Dual alkali, magnesium oxide method and ammonia process, and part is built
Wet desulphurization device mostly use limestone-gypsum method, this kind of technique all exist desulfurizing byproduct secondary pollution problem and
The easy fouling of system equipment and blockage problem.
Owing to country is increasingly tighter to the standard of coke oven tail gas discharge now, traditional wet sprinkling technique cannot expire
Foot requirement (the 15mg/Nm to dust emission3), need to install wet electrical dust precipitator additional in tower outlet or quiet flue.Cost of investment,
Operating cost is high, the unfavorable factor of fluctuation of service, therefore, special to traditional wet desulphurization (such as Ammonia Process, magnesium oxide method, double
Alkaline process) technique improved and perfect, to meet the tightest exhaust emissions environmental requirement.
Summary of the invention:
For overcoming the defect of prior art, the purpose of this utility model is to provide a kind of coke oven low-sulfur tail gas wet method desulfurization
Reduce soluble dust exhaust system, the shortcoming that above several wet desulfurizing process can be overcome, can run and be specifically designed for Jiao
Wet desulphurization (Ammonia Process, magnesium oxide, the Dual alkali) technique of stove feature.
This utility model solves technical problem and adopts the following technical scheme that
A kind of coke oven low-sulfur tail gas wet method desulfurization minimizing soluble dust exhaust system:
Including desulfuration absorbing tower and be located at the blood circulation outside described desulfuration absorbing tower；
It is provided with gas approach in the middle and lower part of desulfurizing tower, in the desulfurizing tower above described gas approach, depends on from bottom to top
Secondary be provided with spray-absorption district, water wash system, except mist foam-removing system, tower top is provided with chimney；
The blood circulation of described outside and described spray-absorption district, water washing device, except being provided with pipeline between mist foam-removing system
Connection.
Described water wash system has: be sequentially arranged in the gas-liquid dividing plate above described spray-absorption district, Venturi rod layer, first
Wash spray layer, the second wash spray layer.
Described except mist foam-removing system be to be located at tower top demister layer above described second wash spray layer, silk screen except mist
Device.
Described gas-liquid dividing plate has reservoir and is located at the gas cap above reservoir, is formed and supply between reservoir and gas cap
The passage that flue gas passes through from bottom to top；Cleaning mixture is fallen in reservoir by gas cap from top to bottom, and described reservoir is provided with overfall.
The type washing trough of the blood circulation outside the connection of described overfall, is provided with washing water pump outside described type washing trough,
By described washing water pump and transfer pipeline, the washings in type washing trough are pumped to spray-absorption district respectively, the first washing is sprayed
Drench layer, the second wash spray layer.
In this utility model scheme, from heat recovery boiler high temperature (about 160 170 DEG C) out, increase through booster fan
Send into desulfurizing tower cooling (less than 70 DEG C) by pipeline after pressure, remove the dust in flue gas and acidic materials, enter back into desulfurization and inhale
Receive tower spray-absorption removing SO2Afterwards, after top of tower dedusting Sprayer Circulation system, through tower after except mist (foam removal) device except mist
Top smoke stack emission.
This device is specific to coke oven tail gas low-sulfur, the feature of low dust combines SO2, dust minimum discharge require and set
Meter exploitation.
Desulfurization tower top demister is tubular type+ridge type demister, it is characterized in that tubular type is arranged in below ridge type demister,
The effect of tubular demister is to remove the oarse-grained drop carried secretly in flue gas, and ridge type demister is two grades of demisters, and joins
Having flushing water system, it act as removing the little particle droplet that tubular demister cannot be removed.Two different form of except mist
Device combines can more preferably control the content of entrained drip in flue gas.
Two-layer wire mesh demister it is provided with, to remove the less dust of particle diameter in flue gas and mist after ridge type demister
Drip.
Compared with the prior art, the beneficial effects of the utility model are embodied in:
The cooling that can be realized flue gas by this device is washed and SO2The removing of dust, reaches minimum discharge requirement, SO2Concentration
Less than 30mg/Nm3, dust concentration is less than 15mg/Nm3。
This device by desulfuration absorbing tower, circulating water wash, two grades form except mist, two grades of foam-removing systems etc., pass through flue
Being connected, desulfurizing tower is provided with middle temperature smoke inlet and sulfur ammonium serum outlet, has smoke entrance and absorbent to add entrance；Desulfurization is inhaled
Receiving in tower has except mist section, circulating water wash section, absorber portion and stock tank section from top to bottom, and stock tank section is divided into oxidation panel and non-oxide section,
Oxidation panel is provided with oxidation air pipe network, and absorber portion is provided with absorption spraying layer, and spraying layer is made up of spray pipe network and nozzle, spray
The sprayed slurry of layer is carried by pipeline from stock tank (oxidation panel and non-oxide section) by circulating pump.Desulfurizing tower top is provided with two layers
Washing spraying layer, spraying layer is made up of spray pipe network and nozzle, is connected with water circulating pump by pipeline, and tower is outside equipped with one and follows
Ring water tank, the solution of cyclic water tank is delivered to wash spraying layer, then further through flow by gravity to cyclic water tank by water circulating pump.
This device recirculated water washing system, mainly has water circulating pump, cyclic water tank, is provided with spraying layer pipe in pipeline, tower
Net and nozzle, gas-liquid separation dividing plate, Venturi rod layer (or tower tray) etc. form.Water in cyclic water tank passes through water circulating pump through pipe
The washing spraying layer in tower is delivered in road, with desulfurization after flue gas be fully contacted after, serosity is at Venturi rod layer top (or tower tray)
Form certain thickness liquid (flue gas is fully contacted) through Venturi rod layer or tower tray, gas-liquid, by containing of carrying secretly in flue gas
The serosity of sulfur ammonium granule is caught by solution with dust.It is trapped by gas-liquid demarcation strip with the liquid after smoke contacts, weight
Power flows automatically to cyclic water tank.
Except mist section demister is tubular demister+deflection plate demister, it is provided with rinse-system.
Demister is wire mesh demister, and material is 316L, is provided with rinse-system.
In sum, this device, is effectively solved except mist, foam-removing system by desulfuration absorbing tower, circulating water wash system, tower top
Determine the process problem of coke oven low-sulfur dust-containing tail gas, efficiently solved the discharge of dust and the escape problem of ammonia.
Accompanying drawing illustrates:
Fig. 1 is system pie graph of the present utility model；Fig. 2 is the enlarged drawing of gas-liquid dividing plate；In Fig. 2, arrow upwards is cigarette
Air-flow is that washings flow to, downward arrow.
Label in figure: 1-spray-absorption district, 2 gas-liquid dividing plates, 3-gas cap, 4-overfall, 5-Venturi rod layer, 6-first
Wash spray layer, 7-the second wash spray layer, 8-tower top demister layer, 9-mesh mist eliminator, 10-chimney, 11-washing water pump,
12-type washing trough, 13-regulates valve, 14-reflux pipe, and 15-washes spray piping, 16-gas approach.
Below by way of detailed description of the invention, and the utility model is described in further detail to combine accompanying drawing.
Detailed description of the invention:
In order to make the purpose of this utility model, technical scheme and advantage are clearer, below in conjunction with accompanying drawing and enforcement
Example, is further elaborated to this utility model.Should be appreciated that specific embodiment described herein is only in order to explain
This utility model, is not used to limit this utility model.
Embodiment: see accompanying drawing, this utility model includes desulfuration absorbing tower and is located at the circulation outside desulfuration absorbing tower
System；
Shown in Fig. 1, it is provided with gas approach 16 in the middle and lower part of desulfurizing tower, in the desulfurizing tower above gas approach, under oneself
Be sequentially provided with on and spray-absorption district 1, water wash system, except mist foam-removing system, tower top is provided with chimney 10；Outside blood circulation with
Spray-absorption district 1, water washing device, except being provided with pipeline connection between mist foam-removing system.
Water wash system has: be sequentially arranged in the gas-liquid dividing plate 2 above spray-absorption district 1, Venturi rod layer 5, first washs
Spraying layer the 6, second wash spray layer 7.Except mist foam-removing system be located at tower top demister layer 8 above the second wash spray layer 7,
Mesh mist eliminator 9.
Shown in Fig. 2, gas-liquid dividing plate 2 has reservoir and is located at the gas cap 3 above reservoir, between reservoir and gas cap
Form the passage passed through from bottom to top for flue gas；Cleaning mixture is fallen in reservoir by gas cap from top to bottom, and described reservoir is provided with
Overfall 4.
Overfall 4 connects the type washing trough 12 of the blood circulation of outside, and type washing trough 12 is outside is provided with washing water pump 11, logical
Cross washing water pump 11 and transfer pipeline and the washings in type washing trough 12 are pumped to respectively the 1, the first washing spray of spray-absorption district
Drench layer the 6, second wash spray layer 7.
In running, from waste heat boiler come the supercharging of high-temperature flue gas (160-170 DEG C) intensified blower fan after from tower under
The gas approach 16 in portion enters desulfurizing tower, by spray-absorption district 1, is fully contacted with serosity, lowers the temperature, dedusting and removing acid
After being cooled to 70 DEG C after matter, flue gas from bottom to top continues through gas-liquid separator 2 by after spraying layer, enters back into one-stage water wash spray
Drenching section, gas-liquid separator 2 material is fiberglass or Stainless steel 316 L, and perforate density is 30-40%, after being sprayed by one-stage water wash
Flue gas from bottom to top continue through Venturi rod layer 5 (Venturi rod layer two-layer altogether, percent opening be 40-50%, and material is carbon
Steel+rubber), or tower tray；Again by first wash spray layer the 6, second wash spray layer 7, this two-layer spraying layer is by spray pipe network
(FRP or steel alloy) liquor-saturated with atomizer become.Sprinkle density is 8-12m3/m2Between.
Tower top demister layer 8 is deflection plate demister, the droplet carried secretly carries out one-level except mist in flue gas.The material of demister
Matter is PP.
Flue gas the most from bottom to top passes sequentially through the wire mesh demister 9 of tower top and discharges through the chimney 10 of tower top, to remove
Droplet more than 3 microns and granule in flue gas, make the dust in exiting flue gas and droplet content less than 10mg/Nm3.Silk screen foam removal
The material of device 9 is 316L or PP.
Fresh water (FW) required for system supplements by the technique water tank storage arranged and is pumped into each water by fresh water (FW)
Point, to maintain the water balance of system.
The washing water pump 11 that the solution of washing spray is arranged by system extracts, by water washing spray shower pipe from type washing trough 12
Each spraying layer is delivered in road 15, and the liquid channel through gas-liquid demarcation strip flows automatically to circulating water chennel by reflux pipe 14 the most again
12, washing water pump outlet has pipeline to be connected with desulfurization tower slurry pool, to ensure that the liquid level of desulfurization tower slurry pool (is led in the range of setting
The aperture crossing control and regulation valve 13 regulates).
Claims (5)
1. a coke oven low-sulfur tail gas wet method desulfurization reduces soluble dust exhaust system, it is characterised in that:
Including desulfuration absorbing tower and be located at the blood circulation outside described desulfuration absorbing tower；
It is provided with gas approach (16) in the middle and lower part of desulfurizing tower, in the desulfurizing tower above described gas approach, depends on from bottom to top
Secondary be provided with spray-absorption district (1), water wash system, except mist foam-removing system, tower top is provided with chimney (10)；
The blood circulation of described outside and described spray-absorption district (1), water washing device, except being provided with pipeline between mist foam-removing system even
Logical.
A kind of coke oven low-sulfur tail gas wet method desulfurization the most according to claim 1 reduces soluble dust exhaust system, and it is special
Levying and be, described water wash system has: be sequentially arranged in the gas-liquid dividing plate (2) of described spray-absorption district (1) top, Venturi rod layer
(5), the first wash spray layer (6), the second wash spray layer (7).
A kind of coke oven low-sulfur tail gas wet method desulfurization the most according to claim 2 reduces soluble dust exhaust system, and it is special
Levy and be, described except mist foam-removing system be located at described second wash spray layer (7) top tower top demister layer (8), silk screen
Demister.
A kind of coke oven low-sulfur tail gas wet method desulfurization the most according to claim 2 reduces soluble dust exhaust system, and it is special
Levying and be, described gas-liquid dividing plate (2) has reservoir and is located at the gas cap (3) above reservoir, between reservoir and gas cap
Form the passage passed through from bottom to top for flue gas；Cleaning mixture is fallen in reservoir by gas cap from top to bottom, and described reservoir is provided with
Overfall (4).
A kind of coke oven low-sulfur tail gas wet method desulfurization the most according to claim 4 reduces soluble dust exhaust system, and it is special
Levying and be, the type washing trough (12) of the blood circulation outside described overfall (4) connection, described type washing trough (12) is outside to be provided with
Washings in type washing trough (12) are pumped to respectively by washing water pump (11) by described washing water pump (11) and transfer pipeline
Spray-absorption district (1), the first wash spray floor (6), the second wash spray floor (7).
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108325355A (en) * | 2018-03-05 | 2018-07-27 | 洛阳市天誉环保工程有限公司 | Ultra-clean tapping equipment and technique after a kind of boiler flue gas desulfurization |
| CN108344309A (en) * | 2017-01-22 | 2018-07-31 | 同方环境股份有限公司 | A kind of cooling device for handling water cooling tower in sludge incineration tail gas |
| CN108441266A (en) * | 2018-05-08 | 2018-08-24 | 科林未来能源技术(北京)有限公司 | A kind of the cleaning dust device and its cleaning dust technique of synthesis gas |
| CN108837686A (en) * | 2018-08-01 | 2018-11-20 | 浙江天地环保科技有限公司 | A kind of high-efficient washing Tower System and method suitable for marine exhaust desulfurization |
| CN108970367A (en) * | 2018-10-08 | 2018-12-11 | 杭州蕴泽环境科技有限公司 | A kind of flue gas multiple pollutant cooperative control system and its receive hydraulic art |
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2016
- 2016-06-27 CN CN201620670079.3U patent/CN205832956U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108344309A (en) * | 2017-01-22 | 2018-07-31 | 同方环境股份有限公司 | A kind of cooling device for handling water cooling tower in sludge incineration tail gas |
| CN108325355A (en) * | 2018-03-05 | 2018-07-27 | 洛阳市天誉环保工程有限公司 | Ultra-clean tapping equipment and technique after a kind of boiler flue gas desulfurization |
| CN108441266A (en) * | 2018-05-08 | 2018-08-24 | 科林未来能源技术(北京)有限公司 | A kind of the cleaning dust device and its cleaning dust technique of synthesis gas |
| CN108837686A (en) * | 2018-08-01 | 2018-11-20 | 浙江天地环保科技有限公司 | A kind of high-efficient washing Tower System and method suitable for marine exhaust desulfurization |
| CN108970367A (en) * | 2018-10-08 | 2018-12-11 | 杭州蕴泽环境科技有限公司 | A kind of flue gas multiple pollutant cooperative control system and its receive hydraulic art |
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Address after: 238100 Anhui city of Ma'anshan province Hanshan County Qingxi Town Industrial Park Patentee after: Tongxing environmental Polytron Technologies Inc Address before: 238100 Anhui city of Ma''anshan province Hanshan County Qingxi Town Industrial Park Patentee before: Anhui Tongxing Environmental Protection Engineering Co.,Ltd. |