CN109939556A - The flue gas advanced purification system and its method that residual heat utilization-type plume is eliminated - Google Patents
The flue gas advanced purification system and its method that residual heat utilization-type plume is eliminated Download PDFInfo
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- CN109939556A CN109939556A CN201910325199.8A CN201910325199A CN109939556A CN 109939556 A CN109939556 A CN 109939556A CN 201910325199 A CN201910325199 A CN 201910325199A CN 109939556 A CN109939556 A CN 109939556A
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Abstract
The present invention provides the flue gas advanced purification system and its method that a kind of residual heat utilization-type plume is eliminated, and belongs to environment protection field, by solve it is current in a manner of existing for flue resistance it is big, operation and cost of investment are high and the problems such as can only solve visual pollution.The exhanst gas outlet of boiler successively connects with gas cooler, deduster, desulfurizing tower, flue gas condenser, steam reheater and chimney；Cooling tower/mechanical draft tower condensation cycle water out flows back to cooling tower/mechanical draft tower through flue gas condensing water circulating pump and flue gas condenser；Condensation water heater cooling circulating water outlet and gas cooler cooling cycle water inlet connect, and gas cooler cooling circulating water outlet and the cooling cooling ring water inlet that follows of condensation water heater connect；Enter in boiler No. eight it is low plus connect with condensation water heater condensation water inlet, condensation water heater condenses water out and connects with No. seven low pressure condensation waters outlets, No. eight low pressure condensation waters outlets low pressure condensation water entrances companies with No. seven；Steam reheater condenses water out and condensate system connects.
Description
Technical field
The present invention relates to the flue gas deep purifying systems that environmental technology field more particularly to a kind of residual heat utilization-type plume are eliminated
System and its method.
Background technique
The desulfurization of flue gas mostly uses greatly wet desulfurizing process at present, is 45~55 DEG C of the wet cigarette of saturation after wet desulphurization
Gas, when spreading in entering the lower surrounding air of temperature, the vapor in flue gas can condense to form droplet, and droplet is to light
Line generates refraction, scattering process, to make chimney breast that white or grey coloured plume be presented.Containing de- in coloured plume
Sulphur agent, SO3, acid mist aerosol, escape ammonia, soluble-salt, heavy metal and organic component, it is thin that these pollutants are not only PM2.5
The important composition ingredient of particle, also generates it and secondary conversion has " contribution ".It can be seen that not to the improvement of coloured plume
It is only to mitigate " white cigarette " this visual pollution, core is more to control the pollutant emission in flue gas.
Traditional method for visually eliminating coloured plume is to heat flue gas after desulfurization, i.e. flue gas again using fume afterheat
Heat.However traditional GGH (Gas-Gas-Heater, flue gas heat-exchange unit) technology due to exist blocking, leakage the problems such as, gradually by
It abandons.Water-borne formula MGGH (Mitsubishi Gas-Gas Heater) technology is obtained with respect to the blocking of GGH technology, leakage problem
A degree of improvement, but still remain the problems such as flue resistance is big, and operating cost is high.Flue resistance, which usually exists greatly, draws
Blower power output is not enough, not only needs synchronous progress Induced Draft Fan, causes cost of investment high, less economical.In addition, GGH and
MGGH technology is all made of the method for reduction relative humidity to eliminate coloured plume, and this mode can only not only solve visual pollution,
Can not pollutant in cooperation-removal flue gas, and it is low there are heat exchanger heat exchange efficiency and the problems such as destroy desulfurizing tower water balance.
Summary of the invention
Big to solve to eliminate flue resistance existing for the mode of coloured plume at present, operation and cost of investment are high, heat exchanger
Heat exchange efficiency is low, destroys desulfurizing tower water balance and can only solve the technical problems such as visual pollution, and the present invention provides a kind of waste heat benefit
The flue gas advanced purification system and its method eliminated with type plume.
In order to solve the above technical problems, the technical solution adopted by the present invention is that:
A kind of flue gas advanced purification system that residual heat utilization-type plume is eliminated comprising gas cooler, condensed water heating
Device, flue gas cooling circulating water pump, deduster, air-introduced machine, desulfurizing tower, flue gas condenser, condensate collector, flue gas condensing circulation
Water pump, steam reheater, cooling tower/mechanical draft tower, chimney, condensation water storage tank and condensate system, in which: gas cooler
Smoke inlet and the exhanst gas outlet of boiler connect, the smoke inlet of the exhanst gas outlet of gas cooler and deduster connects, and removes
The exhanst gas outlet of dirt device and the smoke inlet of air-introduced machine connect, and the exhanst gas outlet of air-introduced machine and the smoke inlet of desulfurizing tower connect,
The smoke inlet of the exhanst gas outlet of desulfurizing tower and flue gas condenser connects, the exhanst gas outlet of flue gas condenser and steam reheater
Smoke inlet connection, the exhanst gas outlet of steam reheater and the smoke inlet of chimney connect；The condensation of cooling tower/mechanical draft tower
Circulating water outlet is connect with the condensation cycle water inlet of flue gas condensing water circulating pump, the condensation cycle water of flue gas condensing water circulating pump
Outlet is connected with the condensation cycle water inlet of flue gas condenser, the condensation cycle water out and cooling tower/machine of flue gas condenser
The condensation cycle water inlet of power aeration tower connects；The cooling circulating water outlet of condensation water heater and flue gas cooling circulating water pump
The connection of cooling cycle water inlet, the cooling circulating water outlet of flue gas cooling circulating water pump and the cooling circulating water of gas cooler enter
Mouth connection, the cooling circulating water outlet of gas cooler and the cooling of condensation water heater follow the connection of cooling ring water inlet；Boiler
The middle condensation water inlet for opening up bypass and condensation water heater into No. eight low condensed waters added connects, and condensation water heater coagulates
It bears water the outlet condensation water out added low with No. seven in boiler to connect, No. eight low condensation water outs added and No. seven low condensations added
Water inlet connection；The steam inlet of steam reheater is connect with vapour source, the condensation water out and condensation water system of steam reheater
System connection；The bottom of condensate collector and flue gas condenser connects, and the condensed water in flue gas condenser enters condensation water collection
The condensation-water drain of device, condensate collector is connect with condensation water storage tank.
Optionally, the flue gas advanced purification system that residual heat utilization-type plume is eliminated further includes demister, the flue gas of demister
The connection of the exhanst gas outlet of entrance and flue gas condenser, the exhanst gas outlet of demister and the smoke inlet of steam reheater connect, and remove
The condensed water of day with fog enters condensate collector.
Optionally, the flue gas advanced purification system that residual heat utilization-type plume is eliminated further includes wet electrical dust precipitator, wet type electricity
The smoke inlet of deduster and the exhanst gas outlet of flue gas condenser connect, the exhanst gas outlet and steam reheater of wet electrical dust precipitator
Smoke inlet connection.
Optionally, the gas cooler is metallic recuperator or teflon heat exchanger, and metallic recuperator is H-type fin
Heat exchange of heat pipe or light pipe heat exchanger.
Optionally, the flue gas condenser is metal pipe heat exchanger or teflon heat exchanger, and the metal pipe changes
Hot device is used snakelike horizontally disposed or is arranged vertically, and the teflon heat exchanger is arranged using vertical lifting.
Optionally, the desulfurizing tower is hollow-spraying-tower type desulfurizing tower.
The method that the flue gas advanced purification system that above-mentioned residual heat utilization-type plume is eliminated carries out flue gas deep purifying comprising
Following steps:
S1,130-160 DEG C of the flue gas come out from boiler enter gas cooler, and with come out from condensation water heater
70-80 DEG C of cooling circulating water carries out heat exchange in gas cooler, after so that flue-gas temperature is down to 90-110 DEG C, from flue gas
The cooling circulating water that cooler comes out carries out heat in condensation water heater with condensed water and exchanges so that condensed water is heated, and
The condensing water temperature of the low condensation water out added of matching seven, completes UTILIZATION OF VESIDUAL HEAT IN；
S2,90-110 DEG C of flue gas enters desulfurizing tower through deduster and air-introduced machine and carries out wet desulphurization processing, wet desulphurization
The temperature of treated saturation wet flue gas enters flue gas condenser after being down to 44-50 DEG C, and goes out with from cooling tower/mechanical draft tower
14-30 DEG C of the condensation cycle water come carries out heat exchange in flue gas condenser, and the temperature for being saturated wet flue gas is made to be reduced to 40-
47 DEG C, the condensed water being precipitated in heat exchange process is expelled in condensation water storage tank by condensate collector, after heat exchange
30-40 DEG C of condensation cycle water flow return cooling tower/mechanical draft tower；
S3,40-47 DEG C of saturation wet flue gas enters steam reheater, and in the steam for entering steam reheater by vapour source
Under the action of be warming up to 50-75 DEG C after from chimney be discharged.
The beneficial effects of the present invention are:
By the way that gas cooler is arranged, allow to reduce the flue-gas temperature of the smoke inlet of desulfurizing tower, to reduce de-
The evaporation of desulfurization slurry in sulphur tower, realizes water-saving purpose；By the way that flue gas condenser is arranged, the flue gas of desulfurizing tower can be not only reduced
The temperature of the saturation wet flue gas of outlet realizes the purpose for receiving water to reduce flue gas water content, and realizes returning for condensed water
It receives, not destroy desulfurizing tower water balance, pollutant removing high-efficient.
Gas cooler in the embodiment of the present invention belongs to gas liquid exchanger, and heat transfer coefficient is small, and heat exchange efficiency is low, and coagulates
It bears water heater and belongs to liquid-liquid heat exchanger, heat transfer coefficient is big, and heat exchange efficiency is high, and flue gas collateral resistance is small.In the embodiment of the present invention
Flue gas cooling cycle water temperature in flue gas cooling procedure can be adjusted flexibly, and increase flue gas by reducing flue gas cooling cycle water temperature
Cooling procedure heat exchange difference can substantially reduce the heat exchange area of gas cooler, since condensation water heater category liquid-liquid exchanges heat
Device, heat transfer coefficient is big, and it is smaller to reduce flue gas cooling cycle water temperature heat exchanging area effect.Therefore, the present invention generally speaking can be with
Realize that gross investment most saves.
Gas cooler can reduce the temperature of the flue gas before deduster, promote the SO in flue gas3Equal sour gas and cigarette
Alkaline matter in dirt combines, and realizes to SO3The removing of equal sour gas, is greatly reduced SO3Concentration, reduce to deduster and after
The etching problem of continuous equipment.Trace contaminant exists in the form of the nuclei of condensation mostly in the exhanst gas outlet flue gas of desulfurizing tower, can be with
As the nuclei of condensation in saturation wet flue gas condensation process.Therefore, trace contaminant with condensed water enters liquid during flue gas condensing
Phase, trace contaminant are effectively removed.In short, the embodiment of the present invention can be real during flue gas cooling and flue gas condensing
Existing SO3The removing of sour gas and other trace contaminants.
Flue gas in the embodiment of the present invention successively passes through flue gas cooling and flue gas condensing, final to realize desulfurizing tower exhanst gas outlet
The sharp fall of flue-gas temperature reduces the water content of flue gas, and flue-gas temperature increases after steam reheater reheating, Gas phase Smoke
It declines to a great extent to humidity, while reducing flue resistance, realizes the elimination of coloured plume visual pollution.
To sum up, compared with the background art, the present invention has flue resistance small, without Induced Draft Fan is carried out, runs and throws
Provide at low cost, heat exchange efficiency is high, does not destroy desulfurizing tower water balance, and elimination coloured cigarette can be cooperateed with while eliminating visual pollution
The advantages that pollutant in plumage, can be widely applied to fire coal boiler fume deep purifying, in water-saving and plume elimination field.
Detailed description of the invention
Fig. 1 is system composition schematic diagram of the invention.
Fig. 2 is the connection relationship diagram in the present invention between flue gas condenser and condensate collector and demister.
Specific embodiment
Below in conjunction with drawings and examples, the present invention is described in further detail.
As shown in Figure 1, the flue gas advanced purification system that the residual heat utilization-type plume in the embodiment of the present invention is eliminated comprising
Gas cooler 1, condensation water heater 4, flue gas cooling circulating water pump 5, deduster 6, air-introduced machine 7, desulfurizing tower 8, flue gas condensing
Device 9, condensate collector 10, flue gas condensing water circulating pump 12, steam reheater 13, cooling tower/mechanical draft tower 14, chimney
15, water storage tank 16 and condensate system 17 are condensed, in which: the smoke inlet of gas cooler 1 and the exhanst gas outlet of boiler connect,
The exhanst gas outlet of gas cooler 1 is connect with the smoke inlet of deduster 6, the exhanst gas outlet of deduster 6 and the flue gas of air-introduced machine 7
Entrance connection, the exhanst gas outlet of air-introduced machine 7 are connect with the smoke inlet of desulfurizing tower 8, the exhanst gas outlet and flue gas condensing of desulfurizing tower 8
The smoke inlet of device 9 connects, and the exhanst gas outlet of flue gas condenser 9 is connect with the smoke inlet of steam reheater 13, steam reheating
The exhanst gas outlet of device 13 is connect with the smoke inlet of chimney 15；Cooling tower/mechanical draft tower 14 condensation cycle water out and cigarette
It is gas-cooled and coagulates the condensation cycle water inlet connection of water circulating pump 12, the condensation cycle water out and flue gas of flue gas condensing water circulating pump 12
The condensation cycle water inlet of condenser 9 is connected, the condensation cycle water out and cooling tower/mechanical draft tower of flue gas condenser 9
14 condensation cycle water inlet connection；The cooling circulating water outlet of condensation water heater 4 and the cooling of flue gas cooling circulating water pump 5
Recycle water inlet connection, the cooling circulating water outlet of flue gas cooling circulating water pump 5 and the cooling cycle water inlet of gas cooler 1
Connection, the cooling circulating water outlet of gas cooler 1 are followed cooling ring water inlet with the cooling of condensation water heater 4 and are connect；Boiler
It is middle to enter No. eight low plus 3 condensed waters and open up bypass and connect with the condensation water inlet of condensation water heater 4, condensation water heater 4
Condensation water out it is low with No. seven in boiler plus 2 condensation water out connect, No. eight it is low plus 3 condensation water outs and No. seven low add
2 condensation water inlet connection；The steam inlet of steam reheater 13 is connect with vapour source, the condensation water out of steam reheater 13
It is connect with condensate system 17；Condensate collector 10 is connect with the bottom of flue gas condenser 9, the condensation in flue gas condenser 9
Water enters condensate collector 10, and the condensation-water drain of condensate collector 10 is connect with condensation water storage tank 16.
Wherein, boiler is the boiler in power plant or heating system.Condensate system 17 is also original in the systems such as power plant
Equipment.
By above system, flue gas that the flue gas and flue gas cooling circulating water come out from boiler is installed before deduster 6
Heat exchange is carried out in cooler 1, so that the temperature into the flue gas of deduster 6 reduces, the temperature liter of flue gas cooling circulating water
It is high.Flue gas cooling circulating water carries out heat with condensed water in condensation water heater 4 and exchanges, and condensed water is heated, and matches pot
The condensing water temperature of the low 2 pressure condensation water outlet of No. seven of furnace, completes UTILIZATION OF VESIDUAL HEAT IN.The saturation that the exhanst gas outlet of desulfurizing tower 8 comes out
Wet flue gas carries out heat with flue gas condensing recirculated water in flue gas condenser 9 and exchanges, so that the temperature of saturation wet flue gas reduces, it is cold
Condensate is precipitated, and is discharged by condensate collector 10, and flue gas condensing circulating water temperature increases, and sends to cooling tower/mechanical draft tower
14 are cooled down.
Optionally, as shown in Fig. 2, the flue gas advanced purification system that the residual heat utilization-type plume is eliminated further includes demister
11, the smoke inlet of demister 11 is connect with the exhanst gas outlet of flue gas condenser 9, the exhanst gas outlet and steam reheating of demister 11
The smoke inlet of device 13 connects, and the condensed water of demister 11 enters condensate collector 10.Demister 11 is cold for supplementary set flue gas
The drop of the drop carried secretly in the flue gas that the exhanst gas outlet of condenser 9 goes out, 11 supplementary set of demister finally flows into condensate collector
In 10, it is expelled to together with condensed water in condensation water storage tank 16.
Optionally, the system which eliminates coloured plume further includes wet electrical dust precipitator, the flue gas of wet electrical dust precipitator
Entrance is connect with the exhanst gas outlet of flue gas condenser 9, and the flue gas of the exhanst gas outlet and steam reheater 13 of wet electrical dust precipitator enters
Mouth connection.
Wherein, the gas cooler 1 is metallic recuperator or teflon heat exchanger, and metallic recuperator is H-type fin
Heat exchange of heat pipe perhaps light pipe heat exchanger metallic recuperator material be ND steel, 316L stainless steel or 2205 stainless steels.The cigarette
Gas condenser 9 is metal pipe heat exchanger or teflon heat exchanger, and the metal pipe heat exchanger is using snakelike horizontally disposed
Or be arranged vertically, the teflon heat exchanger is arranged using vertical lifting.The desulfurizing tower 8 is hollow-spraying-tower type desulfurizing tower, is taken off
Sulphur tower 8 is mainly used for removing the SO in flue gas2, while part SO can also be removed3。
The method that the flue gas advanced purification system that above-mentioned residual heat utilization-type plume is eliminated carries out flue gas deep purifying comprising
Following steps S1 to S3:
S1,130-160 DEG C of the flue gas come out from boiler enters gas cooler 1, and comes out with from condensation water heater 4
70-80 DEG C of cooling circulating water heat exchange is carried out in gas cooler 1, after so that flue-gas temperature is down to 90-110 DEG C, from
The cooling circulating water that gas cooler 1 comes out carries out heat with condensed water in condensation water heater 4 and exchanges so that condensed water quilt
Heating, and match No. seven it is low plus 2 condensation water out condensing water temperature, complete UTILIZATION OF VESIDUAL HEAT IN.
Before gas cooler 1 puts into operation, the temperature for the saturation wet flue gas that the exhanst gas outlet of desulfurizing tower 8 comes out is 45-
55 DEG C, after the gas cooler 1 in the embodiment of the present invention puts into operation, the saturation wet flue gas of the exhanst gas outlet of desulfurizing tower 8 out
Temperature become 44-50 DEG C.Thus, the embodiment of the present invention passes through setting gas cooler 1, hence it is evident that reduce from desulfurizing tower
The temperature of the 8 saturation wet flue gas come out.
S2,90-110 DEG C of flue gas enters desulfurizing tower 8 through deduster 6 and air-introduced machine 7 and carries out wet desulphurization processing, and wet process is de-
The temperature of saturation wet flue gas after sulphuring treatment enters flue gas condenser 9 after being down to 44-50 DEG C, and with from cooling tower/mechanical draft
14-30 DEG C of the condensation cycle water that tower 14 comes out carries out heat exchange in flue gas condenser 9, makes the temperature drop for being saturated wet flue gas
Down to 40-47 DEG C, the condensed water being precipitated in heat exchange process is expelled in condensation water storage tank 16 by condensate collector 10,
30-40 DEG C of condensation cycle water flow after heat exchange returns cooling tower/mechanical draft tower 14.
Wherein, cooling load can be adjusted flexibly in the gas cooler 1 in the embodiment of the present invention and flue gas condenser 9, adjust
The water balance of desulfurizing tower 8 is not destroyed during whole load.
S3,40-47 DEG C of saturation wet flue gas enters steam reheater 13, and is entering steam reheater 13 by vapour source
It is discharged after being warming up to 50-75 DEG C under the action of steam from chimney 15.
Flue gas cooling procedure in the embodiment of the present invention can reduce the flue-gas temperature of the smoke inlet of desulfurizing tower 8, thus
The evaporation for reducing desulfurization slurry in desulfurizing tower 8, realizes water-saving purpose；The flue gas that flue gas condensing process can reduce desulfurizing tower 8 goes out
The temperature of the saturation wet flue gas of mouth, reduces flue gas water content, realizes the purpose for receiving water.In short, after system of the present invention puts into operation
Purpose that is water-saving, receiving water may be implemented.
The flue gas advanced purification system and its method that residual heat utilization-type plume of the present invention is eliminated are water-borne in tradition
On the basis of formula MGGH and flue gas condensing technique, the waste heat extracted in flue gas is sent into power plant etc. by condensation water heater 4
Condensate system 17, to realize the effective use of fume afterheat.Since the purpose of reheating is the visual pollution of elimination, and
After flue gas cooling and flue gas condensing, it may be implemented 20 DEG C of environment temperature or more and eliminate visual pollution, after taking steam reheating
It can be achieved to eliminate visual pollution under 5 DEG C of even lower environment temperatures, so taking steam thermal method again, have heat exchange area small, cigarette
Road resistance is low, and investment is low, and year hourly average steam consumption quantity is small, Phaeolin advantage living.The flue gas that the embodiment of the present invention proposes is cold
But the main selection that+flue gas condensing+steam reheating system and method can be used as limited space, lack of capital.
It is understood that the principle that embodiment of above is intended to be merely illustrative of the present and the exemplary implementation that uses
Mode, however the present invention is not limited thereto.For those skilled in the art, essence of the invention is not being departed from
In the case where mind and essence, various changes and modifications can be made therein, these variations and modifications are also considered as protection scope of the present invention.
Claims (7)
1. the flue gas advanced purification system that a kind of residual heat utilization-type plume is eliminated, which is characterized in that including gas cooler (1),
Condensation water heater (4), flue gas cooling circulating water pump (5), deduster (6), air-introduced machine (7), desulfurizing tower (8), flue gas condenser
(9), condensate collector (10), flue gas condensing water circulating pump (12), steam reheater (13), cooling tower/mechanical draft tower
(14), chimney (15), condensation water storage tank (16) and condensate system (17), in which:
The smoke inlet of gas cooler (1) and the exhanst gas outlet of boiler connect, the exhanst gas outlet of gas cooler (1) and dedusting
The smoke inlet of device (6) connects, and the exhanst gas outlet of deduster (6) is connect with the smoke inlet of air-introduced machine (7), air-introduced machine (7)
Exhanst gas outlet is connect with the smoke inlet of desulfurizing tower (8), and the flue gas of the exhanst gas outlet and flue gas condenser (9) of desulfurizing tower (8) enters
Mouth connection, the exhanst gas outlet of flue gas condenser (9) are connect with the smoke inlet of steam reheater (13), steam reheater (13)
Exhanst gas outlet is connect with the smoke inlet of chimney (15)；Cooling tower/mechanical draft tower (14) condensation cycle water out and flue gas
The condensation cycle water inlet of condensation cycle water pump (12) connects, the condensation cycle water out and cigarette of flue gas condensing water circulating pump (12)
The condensation cycle water inlet of gas condenser (9) is connected, the condensation cycle water out and cooling tower/machine power of flue gas condenser (9)
The condensation cycle water inlet of aeration tower (14) connects；The cooling circulating water outlet and flue gas cooling cycle of condensation water heater (4)
The cooling cycle water inlet of water pump (5) connects, the cooling circulating water outlet and gas cooler of flue gas cooling circulating water pump (5)
(1) cooling cycle water inlet connection, the cooling circulating water outlet of gas cooler (1) and the cooling of condensation water heater (4)
Follow the connection of cooling ring water inlet；Enter No. eight low plus (3) condensed waters in boiler and opens up the solidifying of bypass and condensation water heater (4)
Entrance connection is born water, the condensation water out of condensation water heater (4) the condensation water out for adding (2) low with No. seven in boiler is connect,
No. eight low condensation water outs condensation water inlets for adding (2) low with No. seven for adding (3) are connect；The steam inlet of steam reheater (13)
It is connect with vapour source, the condensation water out of steam reheater (13) is connect with condensate system (17)；Condensate collector (10)
It is connect with the bottom of flue gas condenser (9), the condensed water in flue gas condenser (9) enters condensate collector (10), condensed water
The condensation-water drain of collector (10) is connect with condensation water storage tank (16).
2. the flue gas advanced purification system that residual heat utilization-type plume according to claim 1 is eliminated, which is characterized in that also wrap
It includes demister (11), the smoke inlet of demister (11) is connect with the exhanst gas outlet of flue gas condenser (9), the cigarette of demister (11)
Gas outlet is connect with the smoke inlet of steam reheater (13), and the condensed water of demister (11) enters condensate collector (10).
3. the flue gas advanced purification system that residual heat utilization-type plume according to claim 1 is eliminated, which is characterized in that also wrap
Wet electrical dust precipitator is included, the smoke inlet of wet electrical dust precipitator is connect with the exhanst gas outlet of flue gas condenser (9), wet-esp
The exhanst gas outlet of device is connect with the smoke inlet of steam reheater (13).
4. the flue gas advanced purification system that residual heat utilization-type plume according to claim 1 is eliminated, which is characterized in that described
Gas cooler (1) is that perhaps teflon heat exchanger metallic recuperator is H-type finned tube exchanger or light pipe to metallic recuperator
Heat exchanger.
5. the flue gas advanced purification system that residual heat utilization-type plume according to claim 1 is eliminated, which is characterized in that described
Flue gas condenser (9) is metal pipe heat exchanger or teflon heat exchanger, and the metal pipe heat exchanger uses snakelike level
It arranges or is arranged vertically, the teflon heat exchanger is arranged using vertical lifting.
6. the flue gas advanced purification system that residual heat utilization-type plume according to claim 1 is eliminated, which is characterized in that described
Desulfurizing tower (8) is hollow-spraying-tower type desulfurizing tower.
7. the flue gas deep purifying system that residual heat utilization-type plume described in any claim is eliminated in a kind of claim 1 to 6
The method that system carries out flue gas deep purifying, which comprises the steps of:
S1,130-160 DEG C of the flue gas come out from boiler enters gas cooler (1), and comes out with from condensation water heater (4)
70-80 DEG C of cooling circulating water heat exchange is carried out in the gas cooler (1), after so that flue-gas temperature is down to 90-110 DEG C,
The cooling circulating water come out from gas cooler (1) carries out heat with condensed water in condensation water heater (4) and exchanges so that solidifying
It bears water and is heated, and match the condensing water temperature of No. seven low plus (2) condensation water outs, complete UTILIZATION OF VESIDUAL HEAT IN；
S2,90-110 DEG C of flue gas enters desulfurizing tower (8) through deduster (6) and air-introduced machine (7) and carries out wet desulphurization processing, wet process
The temperature of saturation wet flue gas after desulfurization process enters flue gas condenser (9) after being down to 44-50 DEG C, and with from cooling tower/machine power
14-30 DEG C of the condensation cycle water that aeration tower (14) comes out carries out heat exchange in flue gas condenser (9), makes to be saturated wet flue gas
Temperature be reduced to 40-47 DEG C, the condensed water being precipitated in heat exchange process is expelled to condensation by condensate collector (10)
In water storage tank (16), 30-40 DEG C of condensation cycle water flow after heat exchange returns cooling tower/mechanical draft tower (14)；
S3,40-47 DEG C of saturation wet flue gas enters steam reheater (13), and is entering steam reheater (13) by vapour source
It is discharged after being warming up to 50-75 DEG C under the action of steam from chimney (15).
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| CN110531042A (en) * | 2019-07-10 | 2019-12-03 | 华电电力科学研究院有限公司 | A kind of skid-mounted type thermal power generation unit flue gas condensing water sampling method and device |
| CN110559786A (en) * | 2019-08-28 | 2019-12-13 | 嘉兴新嘉爱斯热电有限公司 | flue gas whitening system and method based on partial organic Rankine cycle |
| CN110801714A (en) * | 2019-11-13 | 2020-02-18 | 邯郸学院 | Wet smoke plume governing system of thermal power plant |
| CN111068453A (en) * | 2019-12-27 | 2020-04-28 | 广州智光节能有限公司 | Flue gas whitening system and flue gas whitening method |
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| CN113959241A (en) * | 2021-10-19 | 2022-01-21 | 广东环境保护工程职业学院 | Spray drying tower flue gas waste heat recovery and eliminate wet cigarette feather system |
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