CN209188493U - Wet desulfurization flue gas takes off white device - Google Patents

Wet desulfurization flue gas takes off white device Download PDF

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Publication number
CN209188493U
CN209188493U CN201821679181.5U CN201821679181U CN209188493U CN 209188493 U CN209188493 U CN 209188493U CN 201821679181 U CN201821679181 U CN 201821679181U CN 209188493 U CN209188493 U CN 209188493U
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desulfurization
desulfurization slurry
water
cooling
flue gas
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CN201821679181.5U
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宋乃秋
李伟
李金峰
尚德敏
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Harbin Industrial University Jintao Technology Stock Co Ltd
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Harbin Industrial University Jintao Technology Stock Co Ltd
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Abstract

The utility model provides wet desulfurization flue gas and takes off white device, its overall structure includes three parts: flue gas desulfurization part, desulfurization slurry cooling segment, cooling water radiator portion;Desulfurization slurry cooling segment is made of multi-stage evaporator, multi-stage condensing device and multistage steam pipe, is specifically included: water inlet pipe, intake pump, multi-stage evaporator, water outlet pump, steam pipe, multi-stage condensing device, condensation-water drain, vacuum pumping opening;The desulfurization slurry of desulfurization slurry buffer area, enter multi-stage evaporator by intake pump, water inlet pipe, desulfurization slurry flows from top to bottom in multi-stage evaporator, step by step flash vaporization, the steam that every level-one evaporation generates, multi-stage condensing device is flowed into from steam pipe, desulfurization slurry temperature after multistage evaporation reduces, and the desulfurization slurry of low temperature returns to desulfurizing tower by water outlet pump, and steam condensing water reuse is washed away in desulfurizer mist eliminator, fixed gas is sent to desulfurizing tower after vacuum pumping opening discharge.

Description

Wet desulfurization flue gas takes off white device
Technical field
The utility model relates to flue gas dehumidifying technologies, take off white device more particularly to wet desulfurization flue gas.
Background technique
Wet fuel gas desulfurizing technology process is starched using lime stone (CaCO3), lime (CaO) or sodium carbonate (Na2CO3) etc. Liquid makees detergent, washs in reaction tower to flue gas, to remove the SO2 in flue gas.It this technique existing 50 years goes through History, after continuously improving and improving, Technical comparing is mature, and has desulfuration efficiency high (90%~98%), and unit holds The advantages that amount is big, and coal adaptability is strong, and operating cost is lower and byproduct easily recycles.China thermal power plant, steel mill, 90% with It is upper to use wet type lime/lime stone-gypsum method flue gas desulfurization technique process.
In wet processing, the heat problem again of flue gas directly affects the investment of entire technique.Because de- by wet processing The general temperature of flue gas after sulphur is lower (45 DEG C), mostly in dew point hereinafter, holding if being directly discharged into chimney without reheating Acid mist is easily formed, corrodes chimney, is also unfavorable for the diffusion of flue gas.So wet process device is typically equipped with flue gas reheat system.Mesh Before, using it is more be technical mature regeneration (revolution) formula flue gas heat exchanger (GGH).GGH price is more expensive.
It is exported on wet method fume desulfurizing system absorption tower, the neat stress of discharge is flowing through cigarette due to being in wet saturation state During road, chimney are discharged into atmosphere, because temperature reduces, part vapourous water and pollutant can be coagulated in flue gas, liquid The slurries amount of state will increase, and have drop to descend slowly and lightly within a certain area, be settled down to ground, form gypsum rain;Meanwhile flue gas is in cigarette During chimney mouth is discharged into atmosphere, because temperature reduces, part vapourous water and pollutant can be coagulated in flue gas, in the chimney degree of lip-rounding The steam that nebulizes is raised above, and forms plume, and plume is usually white or canescence.Wet method fume desulfurizing system goes out on absorption tower White plume that mouthful discharge flue gas generates in gypsum rain, contains a large amount of sulfide, constitutes pollution to atmospheric environment.
Currently, in station boiler and Industrial Boiler, is taken off to wet desulfurization flue gas white there are two ways to having used: 1, Before desulfurizing tower, dehumidifies to flue gas cool-down, after desulfurizing tower, to flue gas, then discharge;2, to spray follows repeatedly in desulfurizing tower The desulfurization slurry of ring cools down, and the sprayed slurry of low temperature reduces the water capacity of exhaust gas temperature and smoke evacuation.Wherein first Kind method is the method being widely used, but since gas converting heat effect is bad, heat exchanger volume is huge, seriously corroded, at This height, maintenance cost are high;Second method is simple, at low cost, but is used for the heat exchanger of desulfurization slurry, corruption will soon occurs Erosion, blocking, job insecurity, maintenance cost are high.This method evaporation capacity is small, easily leads to the desulfurization slurry buffer area of desulfurizing tower Generation is risen pond.
Utility model content
The utility model provides wet desulfurization flue gas and takes off white device.
Wet desulfurization flue gas takes off white device, its overall structure includes three parts: flue gas desulfurization part, desulfurization slurry are cooling Partially, cooling water radiator portion.
Flue gas desulfurization part specifically includes: chimney, flue damper, chamber inlet, air blower, desulfurizing tower, demister, spray Shower device, lime slurry import, outlet of sewer, gypsum outlet.
Cooling water radiator portion specifically includes: water inlet pipe, cooling tower, water outlet pump.
There is a flue damper in chimney, in the lower section of flue damper, flue gas enters desulfurizing tower by chimney escape pipe; It is exhanst gas outlet at the top of desulfurizing tower, inner upper has demister, has multi-layer desulfurization slurries spray equipment, desulfurizing tower below demister Desulfurization slurry buffer area is arranged at bottom, there is lime desulfurization slurry inlet on side wall, and desulfurization tower bottom has downwards outlet of sewer, gypsum to go out Mouthful.
The desulfurization slurry of desulfurization slurry buffer area passes through the multi-stage spray device that slurries are pumped into top in desulfurizing tower all the way, Another way is sent to after desulfurization slurry cooling segment cooled down, and returns desulfurization slurry buffer area, and desulfurization slurry cooling segment Heat finally to pass to using cooling tower be the cooling water radiator portion of core to function of environment heat emission.
Desulfurization slurry cooling segment, it is made of multi-stage evaporator, multi-stage condensing device and multistage steam pipe.
Desulfurization slurry cooling segment, specifically includes: water inlet pipe, intake pump, multi-stage evaporator, water outlet pump, steam pipe, multistage Condenser, condensation-water drain, vacuum pumping opening.
The desulfurization slurry of desulfurization slurry buffer area enters multi-stage evaporator by intake pump, water inlet pipe, and desulfurization slurry is more It is flowed from top to bottom in grade evaporator, flash vaporization step by step, the steam that every level-one evaporation generates flows into multi-stage condensing from steam pipe Device, desulfurization slurry temperature after multistage evaporation reduce, and the desulfurization slurry of low temperature returns to desulfurizing tower by water outlet pump;Multi-stage condensing Steam in device delivers heat to cooling water, and steam condensate is exported from bottom condensate water to flow out, and washes away for desulfurizer mist eliminator;No Solidifying gas is extracted out from vacuum pumping opening, is transmitted back to desulfurizing tower.
Detailed description of the invention
Fig. 1 is that the utility model wet desulfurization flue gas takes off white Installation practice overall pattern;
Fig. 2 is that the utility model wet desulfurization flue gas takes off white Installation practice desulfurization slurry cooling unit structure chart.
Specific embodiment
With reference to the accompanying drawings and examples, the utility model is described in further detail.
Fig. 1 gives the utility model wet desulfurization flue gas and takes off white Installation practice overall pattern.
The utility model wet desulfurization flue gas takes off white Installation practice, its overall structure includes three parts: 1, flue gas is de- Sulphur part;2, desulfurization slurry cooling segment;3, cooling water radiator portion.
Flue gas desulfurization part is made of chimney and desulfurizing tower, is specifically included: chimney 10, flue damper 11, chamber inlet 14, air blower 21, desulfurizing tower 20, demister 25, spray equipment 26, lime slurry import 22, outlet of sewer 23, gypsum outlet 24。
Desulfurization slurry cooling segment is made of multi-stage evaporator, multi-stage condensing device and multistage steam pipe, is specifically included: water inlet Pipe 31, intake pump 32, multi-stage evaporator 30, water outlet pump 33, steam pipe 41, multi-stage condensing device 40, condensation-water drain 42, vacuum are taken out Port 43.
Cooling water radiator portion includes: water inlet pipe 51, cooling tower 50, cooling blower, water outlet pump 52.
In chimney 10, close to lower part, there is a flue damper 11, chimney channel is divided into two parts up and down by it.In cigarette The lower section of chimney baffle 11, the side on chimney wall is chamber inlet 14, and the other side is chimney escape pipe, is had in chimney escape pipe One air blower 21.The air inlet of chimney escape pipe outlet connection 20 lower side of desulfurizing tower.
It is exhanst gas outlet at the top of desulfurizing tower 20, inner upper has demister 25, and there is multi-layer desulfurization in 20 inside of desulfurizing tower up and down Slurries spray equipment 26, when the acid flue gas containing sulfur dioxide flows bottom-up, the lime of the alkalinity of it and spray Desulfurization slurry inversely contacts, and sulfur dioxide reacts with desulfurization slurry, generates sulfurous acid, and be dissolved in desulfurization slurry, finally falls Enter in the desulfurization slurry of desulfurization slurry buffer area of desulfurization tower bottom, and desulfurization fume rises, and from desulfurizing tower top, by removing Day with fog 25 is excluded from exhanst gas outlet.
Sulfurous acid and air reaction in the desulfurization slurry of desulfurization slurry buffer area become sulfuric acid, then react generation with calcium and contain There are the calcium sulfate of the crystallization water, i.e. gypsum, and is excluded from bottom gypsum outlet 24.
The desulfurization slurry of desulfurization slurry buffer area enters multi-stage evaporator 30 by intake pump 32, water inlet pipe 31, due to more It is low to imitate evaporimeter internal pressure, desulfurization slurry flash vaporization step by step from top to bottom.The steaming that the evaporation of the every level-one of multi-stage evaporator 30 generates Vapour flows into multi-stage condensing device 40 from jet chimney 41.Desulfurization slurry temperature after multistage evaporation reduces, the desulfurization slurry of low temperature The desulfurization slurry buffer area of desulfurizing tower 20 is flowed back by outlet pipe by water outlet pump 33.In desulfurizing tower, with the desulfurization of low temperature Slurries are sprayed, and flue gas can be made sufficiently to cool down, be reduced humidity of flue gas sufficiently.
Flash-off steam enters multi-stage condensing device 40 by multistage steam pipe 41, and every level-one of multi-stage condensing device 40 is all partition Formula heat exchanger, the condensed water that the every level-one of multi-stage condensing device 40 generates are trickled downwards step by step by drain ports at different levels, and every level-one generates On-condensible gas flowed downward step by step by air hoses at different levels.
There is condensation-water drain 42 in afterbody condenser bottom, recycling condensed water is washed away for desulfurizer mist eliminator;? There are vacuum pumping opening 43, a variety of on-condensible gases, including air and sulfur dioxide in afterbody condenser side, from vacuum pumping opening Extraction, is transmitted back to desulfurizing tower.
Have the water inlet pipe and intake pump 52 of the cooling water of low temperature in the bottom of multi-stage condensing device 40, top have be heated it is cold But the outlet pipe 51 of water.In multi-stage condensing device 40, cooling water absorbs steam condensation heat and heats up.
The cooling water of the heat flowed out at the top of multi-stage condensing device 40 is entered in cooling tower 50, Cong Shangxiang by water inlet pipe 51 The air inversion of lower spray, the rising driven with cooling blower exchanges heat, and cooling water temperature drops onto the water storage of 50 bottom of cooling tower Case, the cooling water of low temperature passes through water outlet pump 52 and outlet pipe again in water storage box, flows into the cooling water of multi-stage condensing device afterbody Import.In cooling tower, under the action of cooling blower, the cold air of environment flows from bottom to top, is absorbing cooling water heat After steam, the humid air of formation is flowed out by water deflector from cooling tower top.
Fig. 2 gives the utility model wet desulfurization flue gas and takes off white Installation practice desulfurization slurry cooling unit structure chart.
The utility model wet desulfurization flue gas takes off white Installation practice desulfurization slurry cooling segment by multi-stage evaporator, multistage Condenser and multistage steam pipe composition;And level-one evaporator, a steam pipe and first-stage condenser constitute desulfurization slurry cooling Unit, so it may also be said that it is by several that the utility model wet desulfurization flue gas, which takes off white Installation practice desulfurization slurry cooling segment, A identical desulfurization slurry cooling unit composition.
This figure provides a desulfurization slurry cooling unit, it is by level-one evaporator, a steam pipe and first-stage condenser structure At specifically including: drip water plate 34, vaporization chamber 35, shell 37, venthole 36, bottom plate 38, steam pipe 41, heat transfer plate 47, deflector 46, air hose 44, drain port 45, bottom plate 49, water inlet 48.The bottom plate 38 of the same level, it is the drip water plate of next stage again.
Desulfurization slurry in multi-stage evaporator has certain thickness on drip water plate 34, in pressure and slurries itself gravity Under, desulfurization slurry is flowed down from the water drenching hole gathered on drip water plate 34, into vaporization chamber 35, at once flash vaporization, the steaming of generation Vapour is by the venthole 36 on shell 37, by steam pipe 41, into condenser.Vaporization chamber 35 flashes remaining slurries, falls on On bottom plate 38, and bottom plate 38 it be next stage drip water plate.
Enter the steam of condenser by steam pipe 41, it is changed by the heat transfer plate 47 of waveform and the cooling water of the other side Heat, steam condensation Cheng Shui trickle downwards, by the drain port 45 on bottom plate 49, flow into next stage condenser.Contain in steam On-condensible gas reaches the lower part of condenser with steam, by the thinner air hose 44 on side wall, flows into next stage condenser.
There is the water inlet 48 of cooling water on bottom plate 49, from cooling tower or the low-temperature cooling water come from previous stage from water inlet 48 enter the same level condenser, and under the guidance of deflector 46, cooling water absorbs other side steam along 47 surface flow of heat transfer plate The heat of condensation.Finally, the cooling water being heated is flowed out from the water outlet on the same level top plate.

Claims (2)

1. wet desulfurization flue gas takes off white device, its overall structure includes three parts: flue gas desulfurization part, desulfurization slurry cooling end Divide, cooling water radiator portion;Flue gas desulfurization part specifically includes: chimney, flue damper, chamber inlet, air blower, desulfurization Tower, demister, spray equipment, lime slurry import, outlet of sewer, gypsum outlet;Cooling water radiator portion specifically includes: water inlet Pipe, cooling tower, water outlet pump;Have a flue damper in chimney, in the lower section of flue damper, flue gas by chimney escape pipe into Enter desulfurizing tower;It is exhanst gas outlet at the top of desulfurizing tower, inner upper has demister, there is multi-layer desulfurization slurries spray dress below demister It sets, desulfurization tower bottom has desulfurization slurry buffer area, there is lime desulfurization slurry inlet on side wall, and desulfurization tower bottom has sewage to go out downwards Mouth, gypsum outlet;The desulfurization slurry of desulfurization slurry buffer area passes through the multi-stage spray that slurries are pumped into top in desulfurizing tower all the way Device, another way are sent to after desulfurization slurry cooling segment cooled down, and return desulfurization slurry buffer area, and desulfurization slurry is cooling It is the cooling water radiator portion of core to function of environment heat emission that partial heat, which is finally passed to using cooling tower, it is characterised in that: described de- Sulphur slurries cooling segment, it is made of multi-stage evaporator, multi-stage condensing device and multistage steam pipe.
2. wet desulfurization flue gas described in accordance with the claim 1 takes off white device, it is characterised in that: the desulfurization slurry cooling end Point, it specifically includes: water inlet pipe, intake pump, multi-stage evaporator, water outlet pump, steam pipe, multi-stage condensing device, condensation-water drain, vacuum Bleeding point;The desulfurization slurry of desulfurization slurry buffer area enters multi-stage evaporator by intake pump, water inlet pipe, and desulfurization slurry is more It is flowed from top to bottom in grade evaporator, flash vaporization step by step, the steam that every level-one evaporation generates flows into multi-stage condensing from steam pipe Device, desulfurization slurry temperature after multistage evaporation reduce, and the desulfurization slurry of low temperature returns to desulfurizing tower by water outlet pump;Multi-stage condensing Steam in device delivers heat to cooling water, and steam condensate washes away after bottom condensate water outlet outflow for desulfurizer mist eliminator; Fixed gas returns to desulfurizing tower after vacuum pumping opening discharge.
CN201821679181.5U 2018-10-08 2018-10-08 Wet desulfurization flue gas takes off white device Active CN209188493U (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109289476A (en) * 2018-10-08 2019-02-01 哈尔滨工大金涛科技股份有限公司 Wet desulfurization flue gas takes off white device and de- whitening method
CN112755566A (en) * 2021-02-01 2021-05-07 山东祥桓环境科技有限公司 Flash evaporation coupling cyclone vapor-liquid separation device and waste heat recovery process thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109289476A (en) * 2018-10-08 2019-02-01 哈尔滨工大金涛科技股份有限公司 Wet desulfurization flue gas takes off white device and de- whitening method
CN112755566A (en) * 2021-02-01 2021-05-07 山东祥桓环境科技有限公司 Flash evaporation coupling cyclone vapor-liquid separation device and waste heat recovery process thereof

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