CN202136916U - Flue gas purification system - Google Patents

Flue gas purification system Download PDF

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Publication number
CN202136916U
CN202136916U CN201120230097U CN201120230097U CN202136916U CN 202136916 U CN202136916 U CN 202136916U CN 201120230097 U CN201120230097 U CN 201120230097U CN 201120230097 U CN201120230097 U CN 201120230097U CN 202136916 U CN202136916 U CN 202136916U
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CN
China
Prior art keywords
flue gas
flue
purification system
cigarette
gas purification
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
CN201120230097U
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Chinese (zh)
Inventor
吴凯
秦志坚
郑文胜
王立
陈卫荣
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Suzhou Kede Technical Research & Development Co Ltd
EVERBRIGHT ENVIRONMENTAL ENERGY (SUZHOU) Ltd
Original Assignee
Suzhou Kede Technical Research & Development Co Ltd
EVERBRIGHT ENVIRONMENTAL ENERGY (SUZHOU) Ltd
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Application filed by Suzhou Kede Technical Research & Development Co Ltd, EVERBRIGHT ENVIRONMENTAL ENERGY (SUZHOU) Ltd filed Critical Suzhou Kede Technical Research & Development Co Ltd
Priority to CN201120230097U priority Critical patent/CN202136916U/en
Application granted granted Critical
Publication of CN202136916U publication Critical patent/CN202136916U/en
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A50/00TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
    • Y02A50/20Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters

Abstract

A flue gas purification system comprises a dust remover arranged at a fume inlet, an induced draft fan and a smoke discharge chimney, wherein an ammonia injection device for denitration, a catalytic reactor for removing Dioxin and nitrogen oxides, a reaction tower for deacidification and white smoke removal which are sequentially communicated with each other through a flue are arranged between the dust remover and the induced draft fan; the reaction tower is a washing tower and comprises a water tank arranged at the bottom of a tower body, a secondary side low-temperature chimney flue for the entry of flue gas, which is arranged on the tower body, as well as a secondary side high-temperature chimney flue for the outlet of flue gas, which is arranged at the upper part of the tower body; at least one group of sprinkle devices are arranged at the upper part inside the tower body; filling materials for heat absorption and water separating are arranged above the sprinkle devices; a circulating pump is arranged a the connecting pipeline between the water tank and the group of the sprinkle devices; and a water replenishing device and a pollution discharge device are further arranged on the water tank. A flue gas heater is further arranged at the outlet of the dust remover, and a smoke-smoke heat exchanger is arranged between the catalytic reactor and the reaction tower. The flue gas purification system solves the problems in the prior art such as lost of fly ash, undecomposed Dioxin, a great demand of ammonia water, visual pollution of white smoke.

Description

A kind of flue gas purification system
Technical field
The utility model relates to a kind of flue gas purification system, relates to especially that employing catalysis method in a kind of garbage combustion device is removed dioxin and nitrogen oxide and depickling and except that the flue gas purification system of white cigarette.
Background technology
Can produce a large amount of flue gases behind the consumer waste incineration, not only containing the sour gas that produces after a large amount of burnings in the flue gas (mainly is HCL, SO 2), pollutant such as dust granules, heavy metal and dioxin, also contain a large amount of steam.Wherein toxicity of dioxin is big, and it is mainly to be present in flue gas and the flying dust, and dioxin is influential to surrounding environment in the flue gas, and flying dust is a danger wastes, and handling is high.Also having the steam in the flue gas in the winter time also is visual pollution, and daytime is long sees it is white water smoke, and evening is long sees it is black water smoke.At present, common flue gas purification system comprises: SNCR denitration (spraying into ammoniacal liquor in the burner hearth)+semidry method (SDA) depickling (spray lime white)+dry method depickling (spray dry lime)+activated carbon (PAC) absorption+sack cleaner (FF) is removed dioxin and heavy metal.Flue gas enters atmosphere through the high chimney of 80M.
Purify chemical equation in each process:
Ca (OH) 2+2HCl → CaCl2+2H2O (depickling).
Ca (OH) 2+SO2 → CaSO3+H2O (depickling).
4NH3+6NO → 5N2+6H2O (denitration).
8NH3+6NO2 → 7N2+12H2O (denitration).
Its weak point of prior art is, this cleaning system spray lime, active carbon have strengthened the flying dust amount, and dioxin just obtains absorption, and undecomposed.Denitrogenating required ammoniacal liquor is to spray into burner hearth, because the burner hearth capacity is huge, the ammoniacal liquor requirement is big.Pure qi (oxygen) is discharged in the atmosphere meets cold meeting and condenses into numerous little droplet; Thereby produce the smog of white,, destroy the appearance of the city easily though removed pollutant in this smog; Or to be misread be to have produced poisonous smog, thereby the visual pollution of causing, harmful effect such as raise fear.
The utility model content
The purpose of the utility model provides a kind of flue gas purification system, solve that existing flue gas purification system exists that the flying dust amount is big, dioxin is undecomposed, the ammoniacal liquor requirement greatly and white cigarette visual pollution problem.
The utility model solves the technical scheme that its technical problem adopted:
A kind of flue gas purification system, it comprises deduster, air-introduced machine and the smoke evacuation chimney that is arranged on gas approach; It is characterized in that: order is connected through flue the ammonia-gas spraying device that denitration is used is set between described deduster and air-introduced machine, removes the catalytic reactor of dioxin and nitrogen oxide, the reaction tower of depickling, the white cigarette that disappears; Described reaction tower is a scrubbing tower, comprises on water tank that tower body bottom is provided with, the tower body being provided with the secondary side low temperature flue of flue gas, the secondary side high-temperature flue that tower body top sets out flue gas; The tower body internal upper part is provided with one group spray equipment at least; Described spray equipment top also is provided with heat absorption and intercepts the filler of shredded tobacco for water pipes gas; The circulating pump that is provided with on described water tank and the spray equipment connecting line; Also be provided with water replanishing device and blowdown apparatus on the described water tank.
In order to improve exhaust gas temperature, be convenient to Flue Gas Diffusion, between described deduster and ammonia-gas spraying device, also be provided with flue gas and use heater.
In order to reduce the flue-gas temperature that gets into reaction tower, isolated pair of cigarette-cigarette heat exchanger is set between described catalytic reactor and reaction tower; The primary side high-temperature flue of described catalytic reactor outlet is through the primary side low temperature flue of first valve, isolated pair of cigarette-reaction tower UNICOM of cigarette heat exchanger UNICOM.Further, the secondary side low temperature flue of described reaction tower UNICOM is through isolated pair of cigarette-cigarette heat exchanger UNICOM secondary side high-temperature flue.
The primary side high-temperature flue of described catalytic reactor outlet is also through the second valve UNICOM secondary side high-temperature flue.Be in order to lower operating cost, in the higher period of temperature or need not pass through the flue gas that scrubbing tower is handled, at this moment, close first valve, open second valve, let flue gas directly discharge through air-introduced machine, chimney.
Between described catalytic reactor and reaction tower, heat exchanger is set.
Concrete preferred, described deduster is a sack cleaner.Described Smoke-heating device is an electric heater.The inwall of described cigarette-cigarette heat exchanger is done preservative treatment (as ceramic material is set), to prevent cold end corrosion.
Placement concentration is 0.05~0.15% Ca (OH) in the described water tank 2The aqueous solution.
The beneficial effect of the utility model: be connected the washing type reaction tower of the ammonia-gas spraying device that denitration uses, the catalytic reactor of removing dioxin and nitrogen oxide, depickling, the white cigarette that disappears is set owing to be employed in flue; Through increase Smoke-heating device, heat-exchange device is controlled flue-gas temperature, the flue gas of discharging atmosphere further spread and eliminate white cigarette phenomenon.It is following specifically to possess advantage than prior art:
1. dioxin chemical breakdown in the catalytic reactor is thoroughly removed dioxin (clearance is higher than charcoal absorption, and is that chemical breakdown is removed completely).
2. reduce flying dust generation (because catalytic reactor arranges in advance that on the process for purifying flow process cancellation active carbon sprays, ash or mud that its technology rear end wet method deacidification produces because dioxins concentration is well below standard, can be after chemical examinations, not as danger wastes).
3. because with moving behind the deacidifying process, the cigarette temperature that gets into catalytic reactor improves, it is preceding suitably to the heating of flue gas to get into catalytic reactor, energy-conservation.
4. when removing nitrogen oxide, because ammoniacal liquor is to inject directly in the flue, catalyst action is arranged again, ammonia volume significantly reduces.
5. acid-base neutralization in reaction tower has been removed the hydrogen chloride in the flue gas, sulfur dioxide.
6. removed throat steam visual pollution basically.
The utility model is simple in structure, with low cost, can be connected existing gas cleaning treating apparatus afterbody and is widely used.
Below will combine accompanying drawing and embodiment, the utility model will be carried out comparatively detailed explanation.
Description of drawings
Fig. 1 is the flue gas purification system organigram.
Among the figure: 1, through the flue gas after dry method and the semidry method depickling; 2, deduster; 3, ammonia-gas spraying device; 4, heater; 5, catalytic reactor; 6, primary side high-temperature flue; 7, isolated pair of cigarette-cigarette heat exchanger; 8, primary side low temperature flue; 9, reaction tower; 10, filler; 11, spray equipment; 12, water tank; 13, water replanishing device; 14, blowdown apparatus; 15, circulating pump; 16, secondary side low temperature flue; 17, secondary side high-temperature flue; 18, air-introduced machine; 19, chimney; 20 first valves; Second valve.
The specific embodiment
Embodiment 1, and is as shown in Figure 1, a kind of flue gas purification system, and it comprises deduster 2, air-introduced machine 18 and the smoke evacuation chimney 19 that is arranged on through flue gas 1 import after dry method and the semidry method depickling.Order is connected through flue the ammonia-gas spraying device 3 that denitration is used is set between described deduster 2 and air-introduced machine 18, removes the catalytic reactor 5 of dioxin and nitrogen oxide, the reaction tower 9 of depickling, the white cigarette that disappears; Described reaction tower 9 is a scrubbing tower, comprises on water tank 12 that tower body bottom is provided with, the tower body being provided with the secondary side low temperature flue 16 of flue gas, the secondary side high-temperature flue 17 that tower body top sets out flue gas; The tower body internal upper part is provided with one group spray equipment 11 at least; Described spray equipment 16 tops also are provided with heat absorption and intercept the filler 10 (like building stones) of shredded tobacco for water pipes gas.The circulating pump 15 that is provided with on described water tank 12 and spray equipment 11 connecting lines; Also be provided with water replanishing device 13 and blowdown apparatus 14 on the described water tank 12.
Concrete preferred, the commercial product that described catalytic reactor and catalyst all can select for use Sinopec Group on market, to provide.Described deduster is selected sack cleaner.Placement concentration is 0.05~0.15% Ca (OH) in the described water tank 2The aqueous solution.
Embodiment 2, on the technical scheme basis of embodiment 1, in order to improve exhaust gas temperature, are convenient to the smoke catalytic reaction, between described deduster 2 and ammonia-gas spraying device 3, also are provided with flue gas with heater 4.All the other are with embodiment 1.Concrete preferred flue gas heater is an electric heater.
Embodiment 3, on the technical scheme basis of embodiment 1 or 2, in order to reduce the flue-gas temperature that gets into reaction tower 9, isolated pair of cigarette-cigarette heat exchanger 7 are set between described catalytic reactor 5 and reaction tower 9; The primary side high-temperature flue 6 of described catalytic reactor 5 outlets is through the primary side low temperature flue 8 of first valve 20, isolated pair of cigarette-cigarette heat exchanger 7 UNICOM's reaction towers 9 UNICOMs.Further, the secondary side low temperature flue 18 of described reaction tower UNICOM is through isolated pair of cigarette-cigarette heat exchanger 7 UNICOM's secondary side high-temperature flues 17.All the other are with embodiment 1 or 2.The inwall of described cigarette-cigarette heat exchanger is done preservative treatment (as ceramic material is set), to prevent cold end corrosion.
Embodiment 4, and on the technical scheme basis of embodiment 1, the primary side high-temperature flue of described catalytic reactor 5 outlets is also through second valve, 21 UNICOM's secondary side high-temperature flues 17.Be in order to lower operating cost, in the higher period of temperature or need not pass through the flue gas that scrubbing tower is handled, at this moment, close first valve, open second valve, let flue gas directly discharge through air-introduced machine, chimney.
Below the concrete operation principle of setting forth the foregoing description:
Flue gas (58Nm 3/ min) after getting into sack cleaner with 3~5m/s speed by chimney intake under the effect of air-introduced machine; Denitration gets into catalytic reactor (about 150 ℃ of cigarette temperature) catalytic reaction decomposition dioxin again and denitrogenates the reentrant scrubbing tower body interior in back to flue gas spray ammonia through the ammonia-gas spraying device on the flue; At the flue gas of scrubbing tower body interior from bottom to top; Spray equipment then sprays loop solution (83L/min, 0.3MPa) downwards and fully contacts and accomplish depickling (removing hydrogen chloride, sulfur dioxide in the flue gas) and cooling with flue gas; Flue gas a large amount of moisture content the flue gas when 150 ℃ are reduced to 50 ℃ of left and right sides are separated, the filler heat absorption further is set and intercepts shredded tobacco for water pipes gas.The water that freeze-outs is back in the cyclic water tank of scrubbing tower body bottom, and loop solution is through circulating pump and spray equipment recirculation ejection.HCL average emission concentration is controlled at 5mg/Nm 3Below.Flue gas after depickling, the cooling processing gets in the flue; Because the low-temperature flue gas after purifying is 50-80 ℃ steam when scrubbing tower comes out;, exhanst gas outlet contacts cooling again when discharging with atmosphere; Along with rapid diffusion, the cooling of flue gas in atmosphere, can not form white mist at chimney breast this moment, arrived the effect of the white cigarette that disappears.

Claims (8)

1. flue gas purification system, it comprises deduster, air-introduced machine and the smoke evacuation chimney that is arranged on gas approach; It is characterized in that: order is connected through flue the ammonia-gas spraying device that denitration is used is set between described deduster and air-introduced machine, removes the catalytic reactor of dioxin and nitrogen oxide, the reaction tower of depickling, the white cigarette that disappears; Described reaction tower is a scrubbing tower, comprises on water tank that tower body bottom is provided with, the tower body being provided with the secondary side low temperature flue of flue gas, the secondary side high-temperature flue that tower body top sets out flue gas; The tower body internal upper part is provided with one group spray equipment at least; Described spray equipment top also is provided with heat absorption and intercepts the filler of shredded tobacco for water pipes gas; The circulating pump that is provided with on described water tank and the spray equipment connecting line; Also be provided with water replanishing device and blowdown apparatus on the described water tank.
2. flue gas purification system as claimed in claim 1 is characterized in that: between described deduster and ammonia-gas spraying device, also be provided with flue gas and use heater.
3. according to claim 1 or claim 2 flue gas purification system is characterized in that: isolated pair of cigarette-cigarette heat exchanger is set between described catalytic reactor and reaction tower; The primary side high-temperature flue of described catalytic reactor outlet is through the primary side low temperature flue of first valve, isolated pair of cigarette-reaction tower UNICOM of cigarette heat exchanger UNICOM; The secondary side low temperature flue of described reaction tower UNICOM is through isolated pair of cigarette-cigarette heat exchanger UNICOM secondary side high-temperature flue.
4. flue gas purification system as claimed in claim 3 is characterized in that: the primary side high-temperature flue of described catalytic reactor outlet is also through the second valve UNICOM secondary side high-temperature flue.
5. according to claim 1 or claim 2 flue gas purification system, it is characterized in that: described deduster is a sack cleaner
6. flue gas purification system as claimed in claim 2 is characterized in that: described Smoke-heating device is an electric heater.
7. according to claim 1 or claim 2 flue gas purification system is characterized in that: place concentration in the described water tank and be 0.05~0.15% Ca (OH) 2The aqueous solution.
8. according to claim 1 or claim 2 flue gas purification system, it is characterized in that: the described pair of cigarette-inwall setting of cigarette heat exchanger prevents the ceramic material of cold end corrosion effect.
CN201120230097U 2011-06-30 2011-06-30 Flue gas purification system Expired - Lifetime CN202136916U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
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Application Number Priority Date Filing Date Title
CN201120230097U CN202136916U (en) 2011-06-30 2011-06-30 Flue gas purification system

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102294171A (en) * 2011-06-30 2011-12-28 光大环保能源(苏州)有限公司 Flue gas purifying system
CN105066145A (en) * 2015-08-25 2015-11-18 山东新华医用环保设备有限公司 Flue gas treatment device for low-temperature magnetization pyrolysis device
CN105157051A (en) * 2015-08-24 2015-12-16 上海华向节能环保科技有限公司 Fluoroplastic waste heat recycling and ultra-low emission integrated device
CN106621724A (en) * 2017-01-17 2017-05-10 江苏亿金环保科技有限公司 Flue gas desulfurization and dust-whitening integrated device

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102294171A (en) * 2011-06-30 2011-12-28 光大环保能源(苏州)有限公司 Flue gas purifying system
CN105157051A (en) * 2015-08-24 2015-12-16 上海华向节能环保科技有限公司 Fluoroplastic waste heat recycling and ultra-low emission integrated device
CN105157051B (en) * 2015-08-24 2018-01-05 上海华向节能环保科技有限公司 Fluoroplastics waste heat recovery and minimum discharge integrated apparatus
CN105066145A (en) * 2015-08-25 2015-11-18 山东新华医用环保设备有限公司 Flue gas treatment device for low-temperature magnetization pyrolysis device
CN106621724A (en) * 2017-01-17 2017-05-10 江苏亿金环保科技有限公司 Flue gas desulfurization and dust-whitening integrated device

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Granted publication date: 20120208

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