CN208320385U - A kind of elimination white cigarette device for wet fuel gas desulfurizing technology - Google Patents

A kind of elimination white cigarette device for wet fuel gas desulfurizing technology Download PDF

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Publication number
CN208320385U
CN208320385U CN201820361683.7U CN201820361683U CN208320385U CN 208320385 U CN208320385 U CN 208320385U CN 201820361683 U CN201820361683 U CN 201820361683U CN 208320385 U CN208320385 U CN 208320385U
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water
heat exchanger
spraying layer
gas
liquid trap
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CN201820361683.7U
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黄盛珠
张祥波
马建辉
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Weihai Brocade Environmental Protection Technology Co Ltd
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Weihai Brocade Environmental Protection Technology Co Ltd
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Abstract

The utility model relates to a kind of elimination white cigarette devices for wet fuel gas desulfurizing technology, comprising vertical absorption tower, slurries spraying layer, process water spraying layer, rise gas liquid trap, cyclic water tank system, demister and flushing water system, plate heat exchanger, former chimney heat exchanger, net chimney heat exchanger.Slurries spraying layer, process water spraying layer, liter gas liquid trap, cyclic water tank system, demister and flushing water system are connected by pipeline and form the complete circulatory system.Process water connects plate heat exchanger, former chimney heat exchanger, net chimney heat exchanger through technique waterpipe, forms a stable heat-exchange system.The utility model solves the problems such as slurry heat exchanger easy to wear, burn into smoke blowing, blocking, and thoroughly dehumidify to flue gas, it is white to disappear, and gas cleaning effect is greatly improved, especially suitable for flue gas wet desulphurization process.

Description

A kind of elimination white cigarette device for wet fuel gas desulfurizing technology
Technical field
The present invention relates to flue gas desulfurization field, in particular to a kind of elimination white cigarette for wet fuel gas desulfurizing technology fills It sets.
Background technique
Wet desulfurizing process has the history in more than 50 years, and after continuously improving and improving, Technical comparing is mature, and High (90% ~ 98%) with desulfuration efficiency, unit capacity is big, and coal adaptability is strong, and operating cost is lower and byproduct easily recycles Advantage.Thermal power plant, steel mill in China, 90% or more uses wet type lime/lime stone-gypsum method flue gas desulfurization technique process.But The environmental protecting device of many years is built and operation, also fails to obviously solve atmospheric haze pollution, reason may be after wet desulphurization Smoke moisture is big, temperature is low, after being directly discharged into atmosphere, the contamination phenomenons such as acid mist easy to form.Therefore, it discharges fume after wet desulphurization It dehumidified, disappear white, atmospheric environment will be greatly improved, solve the contradiction of environment and development.
China includes smoke re-heater, claims GGH in the industry in the Limestone-gypsum Wet Flue Gas Desulfurization Process complete set technology of introduction, is led to Crossing, which makes flue gas that its temperature are lifted to 80 DEG C or more with dry flue gas indirect heat exchange, discharges.But in practical application, be easy to appear blocking, The problems such as burn into smoke blowing, and influence the normal operation of equipment.Heating agent circulating flue gas reheater MGGH then is introduced, using drop Two groups of heat exchanger separation of mild heating individually arrange then successfully solve the problems, such as blocking, smoke blowing.
It is dehumidifying, in the white practical application that disappears, also proposed other technologies method in some patents, (specially such as Chinese patent Benefit CN201710451922) in, the method mixed by the cold air after will be heated with flue gas, to reach flue gas heating Purpose, although this technology by mixed flue gas achieved the purpose that eliminate white cigarette, also result in discharge flue-gas temperature it is not high, effect The problems such as fruit is poor, exhaust gas volumn increases, flue gas resistance is big.By adding slurry in Chinese patent (patent No. CN 201720168606) Liquid heat exchanger reduces slurry temperature and improves desulfuration efficiency, adds low-temperature zone flue gas heat-exchange unit, flue gas cool-down heat exchanger, improve Exhaust gas temperature, but its slurry heat exchanger added may be prone to wear, corrode, and increase system hidden trouble.
Summary of the invention
It is an object of the invention to overcome the shortcomings of the existing white technology that disappears that dehumidifies, propose a kind of efficient, energy saving, reliable, suitable The elimination white cigarette device of the wet fuel gas desulfurizing technology of Ying Xingqiang solves perishable heat exchanger, abrasion, discharge smoke moisture High, the problems such as temperature is low, really realize flue gas minimum discharge.
A kind of elimination white cigarette device for wet fuel gas desulfurizing technology of the present invention is sprayed comprising vertical absorption tower, slurries Layer, process water spraying layer rise gas liquid trap, cyclic water tank system, demister and mist eliminator flushing water, plate heat exchanger, former cigarette Road heat exchanger, net chimney heat exchanger.The vertical absorption tower includes absorption tower ontology, former smoke inlet, exhanst gas outlet, is absorbed This body section of tower can be round or rectangle, absorbs inner wall of tower and does preservative treatment.The former smoke inlet is set to bottom slurry Pond ullage.The exhanst gas outlet is located at demister and mist eliminator flushing side waterborne.The slurries spraying layer, which is located at, to be inhaled Receive tower flue gas entrance top.The liter gas liquid trap is located above slurries spraying layer.The process water spraying layer, which is located at, to be risen Above gas liquid trap.The demister and mist eliminator flushing water cloth is placed in above circulation (operating) water nozzle, can arrange one group of also cloth Set multiple groups.
The cyclic water tank system includes circulating water pipeline, recirculated water return duct, cyclic water tank and water circulating pump.It follows Ring waterpipe connects cyclic water tank, water circulating pump, process water spraying layer, liter gas liquid trap, plate heat exchanger, and process water is through following Ring water pump is extracted through circulating water pipeline to process water spraying layer, is uniformly sprayed to a liter gas liquid trap, is risen gas liquid trap and is collected work By recirculated water return duct after skill water, cyclic water tank is returned after plate heat exchanger exchanges heat.
The plate heat exchanger is located above cyclic water tank.The former chimney heat exchanger is located in former flue.It is described Net chimney heat exchanger be located at mist eliminator flushing side waterborne.Plate heat exchanger, former chimney heat exchanger, net chimney heat exchanger, pass through The connection of technique waterpipe.
A kind of elimination white cigarette device for wet fuel gas desulfurizing technology of the present invention, principle be the following steps are included:
(1) former flue gas enters absorption tower absorber portion through former smoke inlet, flows up naturally, and slurries spraying layer is equal with passing through The drop contact containing desulfurizing agent of even ejection, flue-gas temperature reduce, and humidity increases, while a variety of sulfide are absorbed.Flue gas Continue to rise through the liter gas liquid trap above slurries spraying layer, the flue gas after preliminary steam-water separation and technique water spray Layer sprays the contact of room temperature process water, and flue-gas temperature is further decreased after condensing, while the solid particle in flue gas becomes aqueous vapor Condensation nuclei, and constantly increase rise with flue gas, after demister gas-liquid separation, neat stress is discharged into atmosphere from exhanst gas outlet.
(2) process water in cyclic water tank is drawn into process water spraying layer, washing, condensation flue gas by water circulating pump By a liter collection for gas liquid trap, cyclic water tank is returned to;Rising gas liquid trap also collects mist eliminator flushing water spray simultaneously Process water, to guarantee that process water can be delivered to suction by underflow pipeline by liquid level and discharge impurity, the cyclic water tank of cyclic water tank Receive tower serum recycle pump intake.
(3) process water that the process water spraying layer described in comes out is heated up after to flue gas washing, condensation by room temperature process water To 40 ~ 50 DEG C, before returning to cyclic water tank, into plate heat exchanger, heat exchange is carried out with the process water from technique waterpipe, is made Its temperature rises to 40 ~ 45 DEG C by room temperature.Process water after heating is through technique waterpipe to former chimney heat exchanger, through hot with former flue gas So that technique coolant-temperature gage is risen to 80 ~ 90 DEG C after exchange, while tentatively cooling down to former flue gas.Process water after heating is again via work The net chimney heat exchanger that skill waterpipe is delivered in adsorption tower smoke outlet makes net cigarette by the heat exchange with neat stress Temperature degree rises to 65 ~ 75 DEG C, while the process water after heat exchange can return to boiler and continue with.
A kind of the advantages of elimination white cigarette device for wet fuel gas desulfurizing technology of the invention, is:
1, a kind of elimination white cigarette device for wet fuel gas desulfurizing technology of the present invention can will be in flue gas by condensation The major part pollutant such as remaining particle dust, sulfur dioxide, acid and condensed water discharge system together, can really realize combustion Coal burning boiler flue gas minimum discharge.
2, a kind of elimination white cigarette device for wet fuel gas desulfurizing technology of the present invention, is filled by three groups of heat exchangers of setting Divide and utilize internal system flue gas heat, makes to discharge flue-gas temperature control at 70 DEG C or so, additionally it is possible to avoid other white skills that disappear that dehumidify Art is easy to appear the problems such as blocking, burn into smoke blowing.
3, a kind of elimination white cigarette device for wet fuel gas desulfurizing technology of the present invention board-like changes for contained one group in device Hot device, wherein the medium to circulate is the process water for rising gas liquid trap and collecting, solid content is lower, significantly reduces to plate-type heat-exchange The abrasion of device extends plate heat exchanger service life.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of the elimination white cigarette device for wet fuel gas desulfurizing technology of the embodiment of the present invention 1.
In figure: 1, vertical absorption tower;2, slurries spraying layer;3, process water spraying layer;4, gas liquid trap is risen;5, former flue gas enters Mouthful;6, circulation slurry pump;7, loop slurry pipeline;8, demister;9, mist eliminator flushing water;10, underflow pipeline;11, recirculated water Case;12, water circulating pump;13, circulating water pipeline;14, technique waterpipe;15, recirculated water return duct;16, exhanst gas outlet;17, Plate heat exchanger;18, former chimney heat exchanger;19, net chimney heat exchanger.
Specific embodiment
The present invention is further elaborated below in conjunction with the drawings and specific embodiments.
Embodiment 1: as shown in Figure 1, former smoke inlet 5 is set in vertical absorption tower 1 above bottom slurry pond at 500mm. Slurries spraying layer 2 is located at 5 top of adsorption tower smoke entrance, and distance can spray pattern according to slurries spraying layer and determine, to prevent from splashing The slurries penetrated in smoke inlet 5 flow backward to flue upstream, and pass through loop slurry pipeline 7 and circulation slurry pump 6 and vertical suction Receive the connection of 1 bottom slurry pond of tower.It rises gas liquid trap 4 to be located at 2 top 1000mm of slurries spraying layer, and passes through recirculated water recurrent canal Road 15 is connect after plate heat exchanger 17 with cyclic water tank 11.Process water spraying layer 2, which is located at, rises 4 top 1000mm of gas liquid trap Place, and connect by circulating water pipeline 13 with water circulating pump 12 and 11 bottom of cyclic water tank.Two groups of demisters 8 and mist eliminator flushing Water 9 is arranged at 2 top 800mm of process water spraying layer, and mist eliminator flushing water 9 is connect with external water supply pipe.Net flue heat exchange Device 19 is located in 9 top exhanst gas outlet 16 of mist eliminator flushing water.Plate heat exchanger 17 is located at cyclic water tank 11 and rises gas liquid trap 4 Between outlet.Former chimney heat exchanger 18 is placed at former smoke inlet 5.Technique waterpipe 14 changes plate heat exchanger 17, former flue Hot device 18, net chimney heat exchanger 19 are connected.
Flue gas in this example is handled using above-mentioned apparatus, steps are as follows:
(1) former flue gas enters vertical 1 absorber portion of absorption tower through former smoke inlet 5, flows up naturally, sprays with by slurries The drop contact containing desulfurizing agent that drenching layer 2 uniformly sprays, flue-gas temperature reduce, and humidity increases, while a variety of sulfide are inhaled It receives.Flue gas continues to rise through the liter gas liquid trap 4 above slurries spraying layer 2, the flue gas after preliminary steam-water separation with Process water spraying layer 3 sprays the contact of room temperature process water, flue-gas temperature is further decreased after condensing, while the solid in flue gas Grain becomes the condensation nuclei of aqueous vapor, and constantly increases and rise with flue gas, and after 8 gas-liquid separation of demister, neat stress goes out from flue gas Mouth 16 is discharged into atmosphere.
(2) process water in cyclic water tank 11 is drawn into process water spraying layer 3 by water circulating pump 12, washs, is cold Through a liter collection for gas liquid trap 4 after solidifying flue gas, cyclic water tank 11 is returned to;Simultaneously rise gas liquid trap 4 also collect demister 8 and The process water of mist eliminator flushing water 9, for the liquid level for guaranteeing cyclic water tank 11, cyclic water tank 11 can will be extra by underflow pipeline 10 Process water be delivered to vertical 1 slurry circulating pump of absorption tower, 6 entrance.
(3) process water that the process water spraying layer 3 described in comes out is risen after to flue gas washing, condensation by room temperature process water Temperature is to 40 ~ 50 DEG C, before returning to cyclic water tank 11, into plate heat exchanger 17, with the external process water from technique waterpipe 14 Heat exchange is carried out, its temperature is made to rise to 40 ~ 45 DEG C by room temperature.Process water after heating is through technique waterpipe 14 to former flue heat exchange Device 18, through with so that technique coolant-temperature gage is risen to 80 ~ 90 DEG C after former flue gas heat exchange, while tentatively cooling down to former flue gas.Heating Process water afterwards is delivered to the net chimney heat exchanger in vertical 1 exhanst gas outlet 16 of absorption tower via technique waterpipe 14 again 19, by the heat exchange with neat stress, neat stress temperature is made to rise to 65 ~ 75 DEG C, while the process water after heat exchange can return Boiler continues with.
Device and method of the present invention are applied in the present embodiment, are contained by sulfur dioxide in the neat stress of chimney discharge Amount, dustiness are up to state standards, without obvious white cigarette phenomenon at smoke evacuation.
Although the present invention has been described by way of example and in terms of the preferred embodiments, embodiment and attached drawing be not for limiting the present invention, It is any to be familiar with this those skilled in the art, without departing from the spirit and scope of the invention, it can make various changes and retouch from working as, but equally exist Within protection scope of the present invention.Therefore protection scope of the present invention should be subject to what claims hereof was defined.

Claims (3)

1. a kind of elimination white cigarette device for wet fuel gas desulfurizing technology includes vertical absorption tower, slurries spraying layer, process water Spraying layer rises gas liquid trap, cyclic water tank system, demister and rinses water system, plate heat exchanger, former chimney heat exchanger, net Chimney heat exchanger;The vertical absorption tower includes absorption tower ontology, former smoke inlet, exhanst gas outlet, this body section of absorption tower It can be round or rectangle, absorb inner wall of tower and do preservative treatment;The former smoke inlet is set to above bottom slurry pond;It is described Exhanst gas outlet be located at demister and rinse water system above;The slurries spraying layer is located at adsorption tower smoke entrance top; The liter gas liquid trap is located above slurries spraying layer;The process water spraying layer, which is located at, to be risen above gas liquid trap;It is described Cyclic water tank system, include circulating water pipeline, recirculated water return duct, cyclic water tank and water circulating pump;The demister And flushing water is arranged in above circulation (operating) water nozzle, can arrange that is also arranged a multiple groups.
2. elimination white cigarette device according to claim 1, it is characterised in that: circulating water pipeline is by cyclic water tank, recirculated water Pump, process water spraying layer rise gas liquid trap, plate heat exchanger connection, and process water passes through circulating water pipeline through water circulating pump extraction To process water spraying layer, it is uniformly sprayed to a liter gas liquid trap, passes through recirculated water return duct after rising gas liquid trap collection process water, Cyclic water tank is returned after plate heat exchanger exchanges heat.
3. elimination white cigarette device according to claim 1, the plate heat exchanger is located above cyclic water tank;Described Former chimney heat exchanger is located in former flue;The net chimney heat exchanger is located at mist eliminator flushing side waterborne;Plate heat exchanger, original Chimney heat exchanger, net chimney heat exchanger, are connected by technique waterpipe.
CN201820361683.7U 2018-03-16 2018-03-16 A kind of elimination white cigarette device for wet fuel gas desulfurizing technology Active CN208320385U (en)

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Application Number Priority Date Filing Date Title
CN201820361683.7U CN208320385U (en) 2018-03-16 2018-03-16 A kind of elimination white cigarette device for wet fuel gas desulfurizing technology

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110327735A (en) * 2019-08-12 2019-10-15 中石化炼化工程(集团)股份有限公司 Desulfurization fume after-treatment device, method and wet desulfurization system

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110327735A (en) * 2019-08-12 2019-10-15 中石化炼化工程(集团)股份有限公司 Desulfurization fume after-treatment device, method and wet desulfurization system
CN110327735B (en) * 2019-08-12 2021-11-19 中石化炼化工程(集团)股份有限公司 Desulfurization flue gas post-treatment device and method and wet desulfurization system

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