CN209155402U - A kind of device for eliminating the coloured plume of wet desulphurization - Google Patents
A kind of device for eliminating the coloured plume of wet desulphurization Download PDFInfo
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- CN209155402U CN209155402U CN201821462168.4U CN201821462168U CN209155402U CN 209155402 U CN209155402 U CN 209155402U CN 201821462168 U CN201821462168 U CN 201821462168U CN 209155402 U CN209155402 U CN 209155402U
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Abstract
The utility model relates to provide a kind of device for eliminating the coloured plume of wet desulphurization.Device provided by the utility model includes wet desulphurization absorption tower, washing cooling system, smoke heat exchanging system, the utility model between traditional wet desulphurization absorption tower spraying layer and demister by being arranged one layer of washing cooling system, washing cooling is carried out to flue gas in tower, so that outlet neat stress temperature in absorption tower reduces, to make the reduction of saturated flue gas humidity；One smoke heat exchanging system of setting is imported and exported in wet desulphurization absorption tower simultaneously, absorption tower is exported into neat stress heat temperature raising using the heat of flue gas former before desulfurization, make to discharge flue-gas temperature more than 10 DEG C of flue gas dew point temperature or more, it is ensured that be formed without color plume and gypsum rain.The utility model, which has, to be further increased desulfuration efficiency, reduces flue gas carrying slurries amount, improve desulfurizing tower efficiency of dust collection, reduce exiting flue gas humidity, discharge flue gas without coloured plume, gypsum rain phenomenon.
Description
Technical field
The utility model relates to it is a kind of eliminate the coloured plume of wet desulphurization device, be suitable for limestone-gypsum method, ammonia process,
The device of the wet desulfurizing process such as magnesium processes, Dual alkali.
Background technique
In China, widely applied wet desulphurization includes limestone-gypsum method, seawater method, ammonia process, magnesium processes, Dual alkali etc..
According to statistics, wet desulphurization reaches 85% or more in China flue gas desulfurization market accounting, in large-size thermal power plant flue gas desulfurization city
Field accounting is more up to 98% or more.
Using limestone-gypsum method is mature, stable as the Wet Flue Gas Desulfurization Technique of representative, desulfuration efficiency is high, but due to wet
In method sweetening process, desulfurization slurry is contacted with high-temperature flue gas, and the evaporation of one side moisture increases humidity of flue gas, on the other hand, cigarette
Temperature degree reduces, and the ability that flue gas carries vapor reduces.Flue gas in a saturated state can also carry part droplet.It carries
The saturation wet flue gas of droplet is discharged into atmosphere after demister removes most of drop, since environment temperature compares flue-gas temperature
Low, flue gas partial vapourous water and pollutant can coagulate, and form misty steam in throat, misty steam can be because of sky background
The reasons such as color and illumination, viewing angle occur color slight change, formed " coloured plume ", usually white, canescence or
The colors such as blue.Environment temperature is lower, ambient humidity is bigger, coloured plume is longer.
If desulfurizer mist eliminator is not normally functioning, desulfurizing tower exiting flue gas can also carry a small amount of gypsum slurries, can make
It is exceeded at solid particulate matter discharge in flue gas, or even after part vapourous water and pollutant coagulate in flue gas, liquid condition
Slurries amount will increase, and there is drop to descend slowly and lightly within a certain area, be deposited on ground it is dry after white gypsum spot, become stone
Cream rain.
The technology for eliminating coloured plume currently on the market is mainly the following technical solution: 1, using flue gas heater pair
Desulfurizing tower outlet wet flue gas directly heats, and is warming up to more than 10-15 DEG C of flue gas dew point temperature；2, using MGGH technology, original is utilized
Flue gas heat carries out heat temperature raising to desulfurizing tower outlet wet flue gas；3, on the basis of 1 and 2, first with gas cooler to desulfurizing tower
Outlet wet flue gas cool down, then take directly heat or MGGH heat exchange heat up to flue gas；4, on the basis of 1 and 2,
Setting slurries cooler cool down to slurries, with the slurries of cooling in tower spraying cooling flue gas, then take directly heat or
Person MGGH heat exchange heats up to flue gas.The above technology, 1 and 2 due to not cooling down to flue gas, and water content compares in flue gas
Height, dew-point temperature is high, and heating needs to consume more thermal energy, while after chimney breast discharge, encountering ambient, cool air cooling,
Still it is readily formed coloured plume, especially in winter.Using being arranged outside tower, gas cooler is cooling to flue gas to drop technical solution 3
Temperature, can reduce smoke moisture, reduce heating thermal energy consumption, but due to outside tower gas cooler volume it is big, arrangement is very tired
Difficulty, especially desulfurizer has all been built in almost all of exhaust gas discharge at present, and transformation position is usually quite anxiety.Separately
Outside, gas cooler is added on flue, will increase flue gas resistance about 400-800Pa, air-introduced machine power consumption is caused to greatly increase；Technology
The problem of scheme 4 is cooling using slurries, overcomes tower foreign cigarette air cooling difficult arrangement to a certain extent, and flue gas resistance increases,
But since wet desulphurization slurry solid content is generally in 20% (mass percent) left and right, the slurries containing a large amount of solid particulate matters
It is cooled down by water cooling heat exchanger, first is that being easy to seriously affect heat transfer effect in water cooling heat exchanger tubulation surface scale.Two
It is that solid particulate matter meeting heat exchanging device tubulation carries out erosive wear, substantially reduces heat exchanger service life.
Summary of the invention
In order to overcome the shortcomings of the prior art described above, provide a kind of elimination wet desulphurization has the purpose of this utility model
The device of color plume.Device provided by the utility model, which has, to be further increased desulfuration efficiency, reduces flue gas carrying slurries amount, mentions
High desulfurizing tower efficiency of dust collection reduces exiting flue gas humidity, discharge flue gas without coloured plume, gypsum rain phenomenon.The utility model is logical
One layer of washing cooling system of setting between traditional wet desulphurization absorption tower spraying layer and demister is crossed, flue gas in tower is carried out
Washing cooling, so that outlet neat stress temperature in absorption tower reduces, to make the reduction of saturated flue gas humidity；It is inhaled simultaneously in wet desulphurization
Tower inlet and outlet one smoke heat exchanging system of setting is received, is risen absorption tower outlet neat stress heating using the heat of flue gas former before desulfurization
Temperature makes to discharge flue-gas temperature more than 10 DEG C of flue gas dew point temperature or more, it is ensured that be formed without color plume and gypsum rain.This is practical new
The advantage of type is cooled down by washing, is not only to cool down to flue gas, reduces humidity, more can significantly be removed and to be carried in flue gas
The pollutants such as solid particulate matter, slurries.
The technical solution that the utility model is taken are as follows:
A kind of device for eliminating the coloured plume of wet desulphurization, including wet desulphurization absorption tower, washing cooling system, flue gas change
Hot systems, the tower body of wet desulphurization absorption tower is interior to be equipped with spraying layer and demister, and tower body bottom is equipped with smoke inlet and desulfurization follows
The outlet of ring liquid, tower body top are equipped with exhanst gas outlet, and spraying layer is located on smoke inlet, and demister is located on spraying layer and cigarette
Under gas outlet, demister has flushing pipe, and for rinsing demister or moisturizing, tower bottom desulfuration recycle pump connects desulphurization circulating
Liquid outlet, provides sprayed slurry for spraying layer；It is characterized by: being set between the spraying layer and demister of wet desulphurization absorption tower
One layer of washing cooling system is set, one smoke heat exchanging system is set in wet desulphurization absorption tower smoke entrance；Flue gas heat exchange system
System is made of flue gas heater, gas cooler, steam heater, heating agent water-circulating pump, and the gas cooler is mounted on
On flue before wet desulphurization absorption tower, flue gas heater is mounted on wet desulphurization absorption tower exhaust pass, gas cooler
And flue gas heater is connected between pipeline and is equipped with heating agent water-circulating pump and steam heater, heat medium water is desalted water, by de-
Salt water carries out heat transfer, and desalted water enters flue gas heater by the pressurization of heating agent water-circulating pump, and desalted water is returned through steam heater
Return gas cooler.
The washing cooling system includes 1-3 layers of spray tube, packing layer, guide ring, liquid collecting bucket, return pipe, circulation
Case, water cooler, 1-3 circulating pump；The liquid collecting bucket is mounted on above the spraying layer of wet desulphurization absorption tower and liquid collecting bucket
Upward, liquid collecting bucket lower part is connected by return pipe with circulating box mouth, and the washing cooling liquid of spray is collected and passes through liquid collecting bucket bottom
Return pipe flow back to circulating box；The guide ring is mounted on above liquid collecting bucket, is blocked the slurries near tower body wall, is made slurries not
It can flow down between liquid collecting bucket and tower wall, all be collected into liquid collecting bucket；The packing layer is mounted on above guide ring, peace
0-1 layers of structured packing are filled, the spray tube is mounted on above packing layer, installs 1-3 layers of spray tube, cooling using water cooler
Water-cooling circulating liquid afterwards carries out circulation washing.Washing cooling layer sprays washing cooling liquid sprinkling of the tubulature by circulation by 1-3 layers
It at tiny drop, is contacted with the flue gas adverse current of rising, to achieve the purpose that mass transfer, heat transfer；The washing cooling liquid sprayed
The circulating box for flowing back to and being arranged outside tower is collected by liquid collecting bucket, the circulating box is steel or concrete structure, and inner wall uses
It serves as a contrast glass reinforced plastic or glass flake carries out preservative treatment.Circulating box built-in water-cooling device, the water cooler use acid corrosion-resistant material
Material production, such as enamel pipe or fluorine plastic tube etc., walk closed cycle cooling water in pipe.The quantity of the circulating pump and washing cool down
The number of plies of spray tube is consistent, and the outlet of every circulating pump is connected with every layer of washing cooling shower respectively, the import of circulating pump with
Circulating box bottom is connected.
The washing cooling system further includes waste water discharge pump, and circulating box bottom is additionally provided with sewage draining exit, and sewage draining exit is set
Waste water discharge pump is set, the particulate matter washed in down cycles liquid precipitates in circulating box, is discharged at regular intervals using waste water
Pump, which carries out blowdown, may return to desulphurization system reuse after sewerage gets to waste water treatment system processing.Wash cooling system loss
Water by mist eliminator flushing water supplement process water.
The liquid collecting bucket is funnel-shaped, and horn mouth is circle, and diameter is the 30%-90% of desulfurizing tower diameter.
The headwall of the liquid collecting bucket and the angle of horizontal plane are 10-70 degree.
The guide ring is just made using two-phase alloys.Guide ring structure annular in shape, ring projection covering
Area is the 15-30% of desulfurizing tower sectional area, and the outer annular edge and wet desulphurization absorption tower wall of the guide ring of cyclic structure are at 60 degree
Several triangle floor supports are arranged in welded corner joint, bottom.
Utilize the method for the device of the above-mentioned elimination coloured plume of wet desulphurization, it is characterised in that sequentially include the following steps:
(1) it is initially entered on wet desulphurization absorption tower gas approach from the 130-180 DEG C of flue gas that boiler or sintering machine come
Gas cooler, transfer heat to heat medium water, increase heating agent coolant-temperature gage, flue-gas temperature is reduced to 105-115 DEG C of entrance
Wet desulphurization absorption tower；
(2) above-mentioned flue gas is sprayed upwardly through the spraying layer of desulfurization in wet desulphurization absorption tower with the spraying layer of desulfurization
Absorbing liquid counter current contacting carry out mass transfer, Absorption Desulfurization, the moisture in smoke evaporative absorbing liquid reaches saturation, and flue-gas temperature drops to
50-60 DEG C, while the sulfur dioxide of 95%-99% is absorbed in flue gas, the dust of 60%-80% is washed；Desulfurization spray
The slurries of layer spray are squeezed by tower bottom desulfuration recycle pump；
(3) after absorbing by above-mentioned mass transfer, the flue gas of most of dust is washed off from liquid collecting bucket and wet desulphurization absorption tower wall
Between gap rise through packing layer, mass-and heat-transfer occurs for the washing cooling liquid of flue gas and filler layer surface, and flue gas passes through filler
Spray tube above layer and packing layer, sulfur dioxide in flue gas, solid particulate matter, slurries are removed by further washing, while cigarette
Temperature degree reduces by 3 DEG C -8 DEG C, and flue-gas temperature reduces, and saturated flue gas water capacity can decline, and the flue gas after reducing temperature and humidity passes through tower top
Demister removes the drop of overwhelming majority carrying, and from wet desulphurization absorption tower top, exhanst gas outlet enters flue gas heat exchange after coming out
The flue gas heater of system, the heat medium water recycled pass through smoke stack emission after being heated to above 10 DEG C of flue gas dew point temperature or more；
(4) circulating box, circulating box built-in water-cooling device, water are flowed back by return pipe after washing cooling liquid is collected by liquid collecting bucket
It is cooled down in cooler pipe using closed circulating water system, after washing cooling liquid is cooling in circulating box, spray is got to by circulating pump
Pipe circulated sprinkling；
(5) washing cooling liquid iterative cycles in circulating box, washing the particulate matter in cooling liquid can be continuous in circulating box
Precipitating, carries out blowdown using waste water discharge pump at regular intervals, and sewerage may return to after getting to waste water treatment system processing
Desulphurization system reuse.
After the flue gas of the utility model is by washing cooling, sulfur dioxide in flue gas, solid particulate matter, slurries are further
Washing removal, while flue-gas temperature reduces by 3 DEG C -8 DEG C, flue-gas temperature reduces, and saturated flue gas water capacity can decline, after reducing temperature and humidity
Flue gas by tower top demister, remove the drops of overwhelming majority carrying, from wet desulphurization absorption tower at the top of exhanst gas outlet come out
Enter smoke heat exchanging system afterwards, former flue-gas temperature is lower before desulfurization, and shortage of heat is to be heated to height for flue gas after desulfurization temperature
When 10 DEG C of dew point, steam heater is opened, it is ensured that being discharged into the flue gas of chimney, no matter which kind of operating condition will not all form coloured plume
And gypsum rain.Since by gas fume washing cooling in tower, humidity of flue gas is reduced, therefore smoke heat exchanging system heating thermic load
Just it is greatly reduced.Flue gas is warming up to more than 10 DEG C of flue gas dew point or more, is discharged by chimney, and coloured plume and gypsum are thoroughly prevented
Rain phenomenon.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Specific embodiment
In conjunction with attached drawing, the utility model will be further described.
As shown in Figure 1, the utility model includes wet desulphurization absorption tower 1, washes cooling system, smoke heat exchanging system, it is wet
Spraying layer 3 and three-level ridge type demister 4 are equipped in the tower body of method desulfuration absorbing tower 1, tower body bottom is equipped with smoke inlet and takes off
The outlet of sulfur cycle liquid, tower body top are equipped with exhanst gas outlet, and spraying layer 3 is located on smoke inlet, three-level ridge type demister 4
On spraying layer 3 and under exhanst gas outlet, three-level ridge type demister 4 has flushing pipe, for rinsing three-level ridge type
Demister 4 or moisturizing, tower bottom desulfuration recycle pump 2 connect the outlet of desulphurization circulating liquid, provide sprayed slurry for spraying layer 3；In wet process
One layer of washing cooling system is set between the spraying layer 3 and three-level ridge type demister 4 of desulfuration absorbing tower 1, is inhaled in wet desulphurization
It receives 1 smoke entrance of tower and one smoke heat exchanging system is set；Smoke heat exchanging system by flue gas heater 14, gas cooler 15,
Steam heater 17, heating agent water-circulating pump 16 form, and the gas cooler 15 is mounted on the cigarette before wet desulphurization absorption tower 1
On road, flue gas heater 14 is mounted on 1 exhaust pass of wet desulphurization absorption tower, 14 phase of gas cooler 15 and flue gas heater
Heating agent water-circulating pump 16 and steam heater 17 are installed, heat medium water is desalted water, carries out heat by desalted water between connecting leg road
Amount transmitting, desalted water enter flue gas heater 14 by the pressurization of heating agent water-circulating pump 16, and desalted water returns to cigarette through steam heater 17
Gas Cooler 15；The washing cooling system include 1 layer of spray tube 8, packing layer 7, guide ring 6, liquid collecting bucket 5, return pipe 9,
Circulating box 10, water cooler 11,1 circulating pumps 12, waste water discharge pumps 13；The liquid collecting bucket 5 is mounted on wet desulphurization absorption tower 1
Spraying layer 3 above and liquid collecting bucket 5 mouth upward, the liquid collecting bucket 5 is funnel-shaped, and horn mouth be circle, diameter is de-
The 80% of sulphur tower diameter；The headwall of liquid collecting bucket 5 and the angle of horizontal plane is 70 degree, and 5 lower part of liquid collecting bucket passes through return pipe 9
It is connected with circulating box 10, the washing cooling liquid of spray is collected, circulating box 10 is flowed back to by the return pipe 9 of 5 bottom of liquid collecting bucket；Institute
The guide ring 6 stated is mounted on the top of liquid collecting bucket 5, blocks the slurries near 1 tower body wall of wet desulphurization absorption tower, makes slurries will not be from
It flows down, is all collected into liquid collecting bucket 5 between liquid collecting bucket 5 and tower wall；The guide ring 6 just made of two-phase alloys and
At guide ring structure annular in shape, ring projects 25% that area coverage is desulfurizing tower sectional area, the guide ring of cyclic structure
Outer annular edge and wet desulphurization absorption tower wall at 60 degree welded corner joints, bottom is arranged several triangle floors and supports；The filler
Layer 7 is mounted on 6 top of guide ring, installs 1 layer of structured packing, and the spray tube 8 is mounted on 7 top of packing layer, installs 1 layer of spray
Shower pipe carries out circulation washing using water cooler Water-cooling circulating liquid after cooling.Washing cooling layer will be recycled by 1 layer of spray tubulature
Washing cooling liquid spray at tiny drop, contacted with the flue gas adverse current of rising, to achieve the purpose that mass transfer, heat transfer；Spray
The washing cooling liquid to get off collects the circulating box 10 for flowing back to and being arranged outside tower by liquid collecting bucket 5, the circulating box 10 be steel or
Person's concrete structure, inner wall carry out preservative treatment, 10 built-in water-cooling device 11 of circulating box, institute using lining glass reinforced plastic or glass flake
The water cooler stated is made of acid corrosion-resistant material, such as enamel pipe or fluorine plastic tube etc., and closed cycle cooling water is walked in pipe；Institute
The quantity for stating circulating pump 12 is consistent with the washing number of plies of cooling shower, and 12 outlets of every circulating pump are dropped with every layer of washing respectively
Warm spray tube 8 is connected, and the import of circulating pump 12 is connected with 10 bottom of circulating box；10 bottom of circulating box is additionally provided with sewage draining exit, row
Waste water discharge pump 13 is arranged in dirty mouth, and the particulate matter washed in down cycles liquid precipitates in circulating box, uses at regular intervals
Waste water discharge pump 13, which carries out blowdown, may return to desulphurization system reuse after sewerage gets to waste water treatment system processing.Washing drop
The water of warm system loss supplements process water by mist eliminator flushing water.
The process flow of the utility model are as follows:
(1) it is initially entered on 1 gas approach of wet desulphurization absorption tower from the 130-180 DEG C of flue gas that boiler or sintering machine come
Gas cooler 15, transfer heat to heat medium water, make heating agent coolant-temperature gage increase, flue-gas temperature be reduced to 110 DEG C or so into
Enter wet desulphurization absorption tower 1；
(2) above-mentioned flue gas is sprayed upwardly through the spraying layer of desulfurization 3 in wet desulphurization absorption tower 1 with the spraying layer 3 of desulfurization
The absorbing liquid counter current contacting of leaching carries out mass transfer, Absorption Desulfurization, and the moisture in smoke evaporative absorbing liquid reaches saturation, flue-gas temperature drop
To 50-60 DEG C, while in flue gas, the sulfur dioxide of 95%-99% is absorbed, and the dust of 60%-80% is washed；Desulfurization spray
The slurries that drenching layer 3 sprays are squeezed by tower bottom desulfuration recycle pump 2；
(3) after absorbing by above-mentioned mass transfer, the flue gas of most of dust is washed off from liquid collecting bucket 5 and wet desulphurization absorption tower 1
Gap rises through packing layer 7 between wall, and mass-and heat-transfer occurs for the washing cooling liquid of flue gas and filler layer surface, and flue gas is by filling out
Spray tube 8 above the bed of material and packing layer, sulfur dioxide in flue gas, solid particulate matter, slurries are by further washing removal, simultaneously
Flue-gas temperature reduces by 3 DEG C -8 DEG C, and flue-gas temperature reduces, and saturated flue gas water capacity can decline, and the flue gas after reducing temperature and humidity passes through tower
Three-level ridge type demister 4 is pushed up, the drop of overwhelming majority carrying is removed, is come out from 1 top exhanst gas outlet of wet desulphurization absorption tower
Enter the flue gas heater 14 of smoke heat exchanging system afterwards, the heat medium water recycled is heated to above 10 DEG C of flue gas dew point temperature or more
After pass through smoke stack emission；
(4) circulating box 10, water built in circulating box 10 are flowed back by return pipe 9 after washing cooling liquid is collected by liquid collecting bucket 5
Cooler 11, water cooler 11 are managed interior use closed circulating water system and are cooled down, and the heat exchange area of water cooler 11 is according to exhaust gas volumn and design
Washing cooling temperature carries out calculating determination.After washing cooling liquid is cooling in circulating box 10, spray tube 8 is got to by circulating pump 12
Circulated sprinkling；
(5) washing cooling liquid iterative cycles in circulating box 10, the particulate matter washed in cooling liquid can not in circulating box
Disconnected precipitating carries out blowdown using waste water discharge pump 13 at regular intervals, and sewerage is got to after waste water treatment system processing can be with
Return to desulphurization system reuse.The water for washing cooling system loss supplements process water by mist eliminator flushing water.
There is no the structure specifically described in the utility model, be existing structure, directly buys in the market.
Embodiment 1
One 300MW unit boiler exhaust gas volumn is 1,100,000 Nm3/ h, temperature are 145 DEG C, sulfur dioxide concentration 2400mg/
Nm3, particle concentration 30mg/Nm3.Sulfur removal technology uses limestone-gypsum method, in traditional mature limestone-gypsum method technique
On the basis of add the utility model washing cooling system and smoke heat exchanging system.
Flue gas initially enters the gas cooler 15 on 1 gas approach of wet desulphurization absorption tower, transfers heat to heating agent
Water increases heating agent coolant-temperature gage, and flue-gas temperature is reduced to 110 DEG C or so and enters wet desulphurization absorption tower 1；Above-mentioned flue gas is in wet process
Upwardly through desulfurization spraying layer 3 in desulfuration absorbing tower 1, mass transfer is carried out with the absorbing liquid counter current contacting that desulfurization spraying layer 3 sprays, is inhaled
Receive desulfurization, the moisture in smoke evaporative absorbing liquid reaches saturation, and flue-gas temperature drops to 52 DEG C, while in flue gas about 98% dioxy
Change sulphur to be absorbed, about 75% dust is washed；The slurries that desulfurization spraying layer 3 sprays are squeezed by tower bottom desulfuration recycle pump 2.This
When saturated flue gas humidity be 13.5%.
After being absorbed by above-mentioned desulfurization spraying layer mass transfer, the flue gas of most of dust is washed off from liquid collecting bucket 5 and absorbs tower wall
Between gap rise through packing layer 7, mass-and heat-transfer occurs for the washing cooling liquid of flue gas and filler layer surface, and flue gas passes through filler
Spray tube 8 above layer and packing layer, sulfur dioxide in flue gas, solid particulate matter, slurries are removed by further washing, while cigarette
Temperature degree reduces by 6 DEG C, and flue-gas temperature reduces, and saturated flue gas water capacity can decline, 46 DEG C of saturated flue gas humidity about 10%.Cooling drop
Flue gas after wet removes the drop of overwhelming majority carrying, from wet desulphurization absorption tower 1 by tower top three-level ridge type demister 4
Top exhanst gas outlet enters smoke heat exchanging system flue gas heater 14 after coming out, and the heat medium water recycled is heated to 65 DEG C, at this time
Flue gas be unsaturated dry flue gas, by smoke stack emission, chimney breast is without coloured plume, Ke object Nong Du≤2mg/Nm3；
Washing cooling liquid passes through return pipe 9 after being collected by liquid collecting bucket 5 and flows back into circulating box 10,10 built-in water-cooling device of circulating box
11, water cooler 11 is managed interior use closed circulating water system and is cooled down.Washing cooling liquid in circulating box by going out tower when 50 DEG C be cooled to
35 DEG C, 8 circulated sprinkling of spray tube is got to by circulating pump 12；Recirculated cooling water in water cooler uses plant area's closed circulating water system.
Washing cooling liquid iterative cycles in circulating box, wash the particulate matter washed in the flue gas to get off in down cycles liquid
It can constantly be precipitated in circulating box, carry out blowdown using waste water discharge pump 13 at regular intervals, sewerage gets to wastewater treatment
It may return to desulphurization system reuse after system processing.The water for washing cooling system loss passes through mist eliminator flushing water supplement technique
Water.
Embodiment 2
One 435m2Sintering machine, exhaust gas volumn are 1,600,000 Nm3/ h, temperature are 135 DEG C, sulfur dioxide concentration 1500mg/
Nm3, particle concentration 50mg/Nm3.Sulfur removal technology uses limestone-gypsum method, in traditional mature limestone-gypsum method technique
On the basis of add the utility model washing cooling system and smoke heat exchanging system.
Flue gas initially enters the gas cooler 15 on 1 gas approach of wet desulphurization absorption tower, transfers heat to heating agent
Water increases heating agent coolant-temperature gage, and flue-gas temperature is reduced to 110 DEG C or so and enters wet desulphurization absorption tower 1；Above-mentioned flue gas is in wet process
Upwardly through desulfurization spraying layer 3 in desulfuration absorbing tower 1, mass transfer is carried out with the absorbing liquid counter current contacting that desulfurization spraying layer 3 sprays, is inhaled
Receive desulfurization, the moisture in smoke evaporative absorbing liquid reaches saturation, and flue-gas temperature drops to 51.5 DEG C, while in flue gas about 98% two
Sulfur oxide is absorbed, and about 75% dust is washed；The slurries that desulfurization spraying layer 3 sprays are squeezed by tower bottom desulfuration recycle pump 2.
Saturated flue gas humidity at this time is 13.1%.
After being absorbed by above-mentioned desulfurization spraying layer mass transfer, the flue gas of most of dust is washed off from liquid collecting bucket 5 and absorbs tower wall
Between gap rise through packing layer 7, mass-and heat-transfer occurs for the washing cooling liquid of flue gas and filler layer surface, and flue gas passes through filler
Washing cooling shower 8 above layer and packing layer, sulfur dioxide in flue gas, solid particulate matter, slurries are gone by further washing
It removes, while flue-gas temperature reduces by 5.9 DEG C, flue-gas temperature reduces, and saturated flue gas water capacity can decline, 45.6 DEG C of saturated flue gas humidity
About 9.8%.Flue gas after reducing temperature and humidity removes the drops of overwhelming majority carrying by tower top three-level ridge type demister 4, from wet
1 top exhanst gas outlet of method desulfuration absorbing tower enters smoke heat exchanging system flue gas heater 14 after coming out, and the heat medium water recycled adds
Heat is to 62 DEG C, and flue gas at this time is unsaturated dry flue gas, and by smoke stack emission, chimney breast is without coloured plume, particle concentration
≦4mg/Nm3；
Washing cooling liquid passes through return pipe 9 after being collected by liquid collecting bucket 5 and flows back into circulating box 10,10 built-in water-cooling device of circulating box
11, water cooler 11 is managed interior use closed circulating water system and is cooled down.Washing cooling liquid in circulating box by going out tower when 49 DEG C be cooled to
33 DEG C, washing 8 circulated sprinkling of cooling shower is got to by washing down cycles pump 12；Recirculated cooling water in water cooler uses
Plant area's closed circulating water system.
Washing cooling liquid iterative cycles in circulating box, wash the particulate matter washed in the flue gas to get off in down cycles liquid
It can constantly be precipitated in circulating box, carry out blowdown using waste water discharge pump 13 at regular intervals, sewerage gets to wastewater treatment
It may return to desulphurization system reuse after system processing.The water for washing cooling system loss passes through mist eliminator flushing water supplement technique
Water.
Claims (8)
1. a kind of device for eliminating the coloured plume of wet desulphurization, including wet desulphurization absorption tower, washing cooling system, flue gas heat exchange
System, the tower body of wet desulphurization absorption tower is interior to be equipped with spraying layer and demister, and tower body bottom is equipped with smoke inlet and desulphurization circulating
Liquid outlet, tower body top are equipped with exhanst gas outlet, and spraying layer is located on smoke inlet, and demister is located on spraying layer and flue gas
Under outlet, demister has flushing pipe, and for rinsing demister or moisturizing, tower bottom desulfuration recycle pump connects desulphurization circulating liquid
Outlet, provides sprayed slurry for spraying layer；It is characterized by: being arranged between the spraying layer and demister of wet desulphurization absorption tower
A smoke heat exchanging system is arranged in wet desulphurization absorption tower smoke entrance in one layer of washing cooling system；Smoke heat exchanging system
It is made of flue gas heater, gas cooler, steam heater, heating agent water-circulating pump, the gas cooler is mounted on wet
On flue before method desulfuration absorbing tower, flue gas heater is mounted on wet desulphurization absorption tower exhaust pass, gas cooler and
Heating agent water-circulating pump and steam heater are installed between the connected pipeline of flue gas heater, heat medium water is desalted water, passes through desalination
Water carries out heat transfer, and desalted water enters flue gas heater by the pressurization of heating agent water-circulating pump, and desalted water is returned through steam heater
Gas cooler.
2. the device according to claim 1 for eliminating the coloured plume of wet desulphurization, it is characterised in that: the washing cooling
System includes 1-3 layers of spray tube, packing layer, guide ring, liquid collecting bucket, return pipe, circulating box, water cooler, 1-3 circulating pump；
The liquid collecting bucket be mounted on above the spraying layer of wet desulphurization absorption tower and the mouth of liquid collecting bucket upward, liquid collecting bucket lower part passes through back
Flow tube is connected with circulating box, and the guide ring is mounted on above liquid collecting bucket, and the packing layer is mounted on above guide ring, peace
0-1 layers of structured packing are filled, the spray tube is mounted on above packing layer, installs 1-3 layers of spray tube, and the circulating box is
Steel or concrete structure, circulating box built-in water-cooling device, the quantity of the circulating pump and the number of plies one of washing cooling shower
It causes, the outlet of every circulating pump is connected with every layer of washing cooling shower respectively, and the import of circulating pump is connected with circulating box bottom.
3. the device according to claim 2 for eliminating the coloured plume of wet desulphurization, it is characterised in that: further include waste water discharge
Pump, circulating box bottom is provided with sewage draining exit, sewage outfalls setting waste water discharge pump.
4. the device according to claim 3 for eliminating the coloured plume of wet desulphurization, it is characterised in that: the liquid collecting bucket is in
Funnel-form, and horn mouth is circle, diameter is the 30%-90% of desulfurizing tower diameter.
5. the device according to claim 3 for eliminating the coloured plume of wet desulphurization, it is characterised in that: the liquid collecting bucket
The angle of headwall and horizontal plane is 10-70 degree.
6. the device according to claim 3 for eliminating the coloured plume of wet desulphurization, it is characterised in that: the guide ring is adopted
It has just been made with two-phase alloys.
7. the device according to claim 6 for eliminating the coloured plume of wet desulphurization, it is characterised in that: the guide ring is in
Cyclic structure, ring project the 15-30% that area coverage is desulfurizing tower sectional area, the outer annular edge and wet process of the guide ring of cyclic structure
For desulfuration absorbing tower wall at 60 degree of welded corner joints, several triangle floor supports are arranged in bottom.
8. the device according to claim 7 for eliminating the coloured plume of wet desulphurization, it is characterised in that: the water cooler is adopted
It is made with acid corrosion-resistant material.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109126331A (en) * | 2018-09-05 | 2019-01-04 | 武汉华德环保工程技术有限公司 | A kind of device and method for eliminating the coloured plume of wet desulphurization |
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2018
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109126331A (en) * | 2018-09-05 | 2019-01-04 | 武汉华德环保工程技术有限公司 | A kind of device and method for eliminating the coloured plume of wet desulphurization |
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