CN111678158A - Wet desulphurization and white removal system - Google Patents
Wet desulphurization and white removal system Download PDFInfo
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- CN111678158A CN111678158A CN202010561254.6A CN202010561254A CN111678158A CN 111678158 A CN111678158 A CN 111678158A CN 202010561254 A CN202010561254 A CN 202010561254A CN 111678158 A CN111678158 A CN 111678158A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/006—Layout of treatment plant
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D50/00—Combinations of methods or devices for separating particles from gases or vapours
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/002—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by condensation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1456—Removing acid components
- B01D53/1481—Removing sulfur dioxide or sulfur trioxide
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/18—Absorbing units; Liquid distributors therefor
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
- B01D53/265—Drying gases or vapours by refrigeration (condensation)
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
- F23J15/04—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material using washing fluids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/08—Arrangements of devices for treating smoke or fumes of heaters
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/008—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases cleaning gases
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J2215/00—Preventing emissions
- F23J2215/20—Sulfur; Compounds thereof
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Abstract
The invention relates to the technical field of flue gas desulfurization treatment, in particular to a wet desulfurization and whitening system which can be used for low-cost reconstruction of the existing flue gas treatment equipment, occupies smaller space, has stable whitening effect and improves the whitening effect and comprises a desulfurization purification tower body, wherein a flue gas heater, a demisting system, a flue gas condensing system, a flue gas washing and purifying system and a desulfurization absorption system are arranged in the desulfurization purification tower from top to bottom; still include the flue gas cooler, for the flue gas washing water supply system that the flue gas washing system provided the circulating water and for the flue gas condensation water supply system that the flue gas condensation system provided recirculated cooling water, the inside of flue gas cooler is provided with cooling pipe, and cooling pipe's output is provided with first circulating pump, and the inside of flue gas heater is provided with the heating pipeline, and the defogging system includes dehydration defroster and electromagnetism white device that takes off.
Description
Technical Field
The invention relates to the technical field of flue gas desulfurization treatment, in particular to a wet desulfurization and whitening system.
Background
As is well known, the flue gas of a coal-fired power plant, the flue gas of sintering machines in the smelting industry and other equipment generally adopts a wet desulphurization technology to remove SO2 in the flue gas, the water vapor in the flue gas at the outlet of a desulphurization tower is in a saturated state, and after the wet saturated flue gas is discharged through a chimney, the water vapor in the flue gas is condensed due to low environmental temperature, and then forms fog-like water vapor at the outlet of the chimney, which is generally white and is called white smoke plume. The smoke condensing and reheating technology is characterized in that the absolute moisture content in white smoke is reduced through temperature reduction, saturated water vapor in the smoke is separated out to form condensed water, then the smoke is reheated to reduce the relative moisture content of the white smoke, and smoke plumes are eliminated.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides the wet desulphurization and whitening system which can transform the prior flue gas treatment equipment at low cost, occupies small space, has stable whitening effect and improves the whitening effect.
(II) technical scheme
In order to achieve the purpose, the invention provides the following technical scheme: a wet desulphurization and whitening system comprises a desulphurization purification tower body, wherein a flue gas heater, a demisting system, a flue gas condensing system, a flue gas washing and purifying system and a desulphurization absorption system are arranged in the desulphurization purification tower from top to bottom; still include the flue gas cooler, for the flue gas washing water supply system that the flue gas washing system provided the circulating water and for the flue gas condensation system provides recirculated cooling water's flue gas condensation water supply system, the output and the import flue intercommunication of flue gas cooler, the inside of flue gas cooler are provided with cooling pipe, cooling pipe's output is provided with first circulating pump, flue gas heater's inside is provided with the hot air line, the output of first circulating pump and hot air line's input intercommunication, hot air line's output and cooling pipe's input intercommunication, the defogging system is including dehydration defroster and the electromagnetism white device of taking off, the electromagnetism white device of taking off is located the top of dehydration defroster.
Preferably, still include washing unit, washing unit includes first water tank, first water pump and washing spray tube, the washing spray tube is installed in the top of electromagnetic whiting device to bottom intercommunication at the washing spray tube is provided with the multiunit washing terminals, the input and the first water tank intercommunication of first water pump, the output and the washing spray tube intercommunication of first water pump.
Preferably, the electromagnetic whitening device is an electromagnetic net.
Preferably, flue gas condensing system and flue gas washing system all flow the board including spraying atomizer and flue gas, the flue gas flow the board and include semicircle pipe under multiunit first semicircle pipe and the multiunit, multiunit first semicircle pipe sets up with the multiunit is crisscross down to the semicircle pipe respectively, and the opening direction of multiunit first semicircle pipe all faces down, and the opening direction of multiunit lower semicircle pipe all faces up to the bottom intercommunication of semicircle pipe is provided with the water collecting pipeline under the multiunit.
Preferably, the flue gas condensation water supply system comprises a first water storage tank, a second circulating pump, a third circulating pump, a heat exchanger, a water cooling tower and a first return pipe, wherein the input end of the first return pipe is communicated with a water collecting pipeline of the flue gas condensation system, the output end of the first return pipe is communicated with the water inlet of the first water storage tank, the input end of the second circulating pump is communicated with the water outlet of the first water storage tank, the output end of the second circulating pump is communicated with the circulating water input end of the heat exchanger, the circulating water output end of the heat exchanger is communicated with a spray atomizer of the flue gas condensation system, the input end of the third circulating pump is communicated with the cold water output end of the water cooling tower, the output end of the third circulating pump is communicated with the cooling water input end of the heat exchanger, and.
Preferably, flue gas washing water supply system includes second aqua storage tank, fourth circulating pump and second wet return, the input of second wet return and flue gas washing system's water collecting pipe intercommunication, the output of second wet return and the water inlet intercommunication of second aqua storage tank, the input of fourth circulating pump and the delivery port intercommunication of second aqua storage tank, the output of fourth circulating pump and flue gas washing system spray the atomizer intercommunication.
Preferably, the first water storage tank is installed on the top end of the second water storage tank, the first water storage tank and the second water storage tank are integrally formed, and a curved heat-conducting plate is arranged between the first water storage tank and the second water storage tank.
Preferably, the cooling pipeline and the heating pipeline are both serpentine pipelines, and H-shaped fins are arranged on the outer sides of the serpentine pipelines.
Preferably, the desulfurization system includes fifth circulating pump and desulfurization spray set, desulfurization spray set installs in the desulfurization purification tower, the input of fifth circulating pump stretches into to the desulfurization purification tower in, the output and the desulfurization spray set intercommunication of fifth circulating pump.
Preferably, the dehydration demister is provided with a plurality of groups.
(III) advantageous effects
Compared with the prior art, the invention provides a wet desulphurization and whitening system, which has the following beneficial effects:
1. the wet desulphurization and whitening system is provided with a flue gas cooler, and the flue gas before desulphurization is cooled and then enters a desulphurization purification tower body; the ultra-low desulfurization of the flue gas is completed through a desulfurization absorption system, the flue gas is washed and purified through atomization spraying of a flue gas purification system, the washed and purified flue gas directly exchanges heat with sprayed circulating cooling water to realize cooling, condensation and dehumidification of the flue gas, the cooled and dehumidified flue gas is dehydrated through a 3-4-layer high-efficiency demister, the flue gas is further whitened through an electromagnetic whitening device, water vapor in white smoke is acted by a pulse magnetic field and can be converted into a liquid phase from a gas phase only by releasing a little energy at normal temperature and normal pressure, the water vapor is also adsorbed on an electromagnetic screen after being condensed into small liquid drops, the white smoke is eliminated after the small liquid drops, the water vapor, a small amount of dust and other impurities in the white smoke are removed, and finally the flue gas is heated and discharged at high altitude through a flue gas heater arranged on an outlet flue to realize the ultra-low emission;
2. according to the wet desulphurization and whitening system, the flue gas cooler cools the flue gas, the flue gas heater heats the flue gas, and water is circulated between the flue gas heater and the flue gas cooler through the first circulating pump, so that the cooling and heating of the flue gas are realized, and the energy is saved;
3. this wet flue gas desulfurization takes off white system increases flue gas cooler and inside electromagnetism on current desulfurization purification tower body basis and takes off white device, convenient transformation, and the transformation cost is lower, and occupation space is less, improves the practicality.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural view of a flue gas flow equalizing plate according to the present invention;
FIG. 3 is a schematic diagram of the construction of the flue gas heater of the present invention;
FIG. 4 is a schematic view of the first and second reservoirs of the present invention;
in the drawings, the reference numbers: 1. a desulfurization purification tower body; 2. a flue gas heater; 3. a defogging system; 4. a flue gas condensing system; 5. a flue gas washing and purifying system; 6. a desulfurization absorption system; 7. an outlet flue; 8. an inlet flue; 9. a flue gas cooler; 10. a cooling pipeline; 11. a first circulation pump; 12. heating the pipeline; 13. a dewatering demister; 14. an electromagnetic de-whitening device; 15. a first water tank; 16. a first water pump; 17. flushing the spray pipe; 18. spraying an atomizer; 19. a flue gas flow equalizing plate; 20. an upper semi-circular tube; 21. a lower semicircular tube; 22. a water collection pipe; 23. a first water storage tank; 24. a second circulation pump; 25. a third circulation pump; 26. a heat exchanger; 27. a water cooling tower; 28. a first water return pipe; 29. a second water storage tank; 30. a fourth circulation pump; 31. a second water return pipe; 32. a curved heat conducting plate; 33. h-shaped fins; 34. a fifth circulation pump; 35. desulfurization spray set.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-4, the wet desulfurization and whitening system of the present invention comprises a desulfurization purification tower body 1, a flue gas heater 2, a defogging system 3, a flue gas condensing system 4, a flue gas washing and purifying system 5 and a desulfurization absorption system 6 are arranged inside the desulfurization purification tower from top to bottom, an outlet flue 7 is arranged at the top end of the desulfurization purification tower, and an inlet flue 8 is arranged at the bottom of the outer side of the desulfurization purification tower; the flue gas cooling device comprises a flue gas cooler 9, a flue gas washing water supply system for providing circulating water for the flue gas washing system and a flue gas condensation water supply system for providing circulating cooling water for a flue gas condensation system 4, wherein the output end of the flue gas cooler 9 is communicated with an inlet flue 8, a cooling pipeline 10 is arranged in the flue gas cooler 9, a first circulating pump 11 is arranged at the output end of the cooling pipeline 10, a heating pipeline 12 is arranged in the flue gas heater 2, the output end of the first circulating pump 11 is communicated with the input end of the heating pipeline 12, the output end of the heating pipeline 12 is communicated with the input end of the cooling pipeline 10, the demisting system 3 comprises a dehydration demister 13 and an electromagnetic whitening device 14, the electromagnetic whitening device 14 is positioned above the dehydration demister 13, the electromagnetic whitening device 14 is an electromagnetic net, and the electromagnetic net whitening is already applied in the field of flue gas treatment, the electromagnetic net whitening and dehydration demister 13 is matched to perform whitening in the scheme, the dehydration demister 13 is used as a main part, the electromagnetic net whitening is used as an auxiliary part, the whitening effect is guaranteed, excessive energy cannot be consumed, the electromagnetic net whitening and dehydration device further comprises a flushing device, the flushing device comprises a first water tank 15, a first water pump 16 and a flushing spray pipe 17, the flushing spray pipe 17 is installed above the electromagnetic whitening device 14, a plurality of groups of flushing spray heads are arranged at the bottom end of the flushing spray pipe 17 in a communicated mode, the input end of the first water pump 16 is communicated with the first water tank 15, the output end of the first water pump 16 is communicated with the flushing spray pipe 17, scales attached to the electromagnetic net can be flushed once every period of time, and the crystal flushing spray pipe 17 is sprayed into the structure on the electromagnetic net to flush.
Flue gas condensing system 4 and flue gas washing system all flow 19 including spraying atomizer 18 and flue gas flow equalization board, flue gas flow equalization board 19 includes semicircle pipe 21 under multiunit upper semicircle pipe 20 and the multiunit, multiunit upper semicircle pipe 20 sets up with the multiunit is crisscross down to semicircle pipe 21 under the multiunit respectively, and the opening direction of multiunit upper semicircle pipe 20 is all down, and the opening direction of semicircle pipe 21 is all up under the multiunit to the bottom intercommunication of semicircle pipe 21 is provided with water collecting pipe 22 under the multiunit, forms the flue gas passageway of S type between upper semicircle pipe 20 and the lower semicircle pipe 21, has the flue gas and flow equalizes, the purpose of dehydration purification, and the flue gas resistance is little simultaneously.
The flue gas condensation water supply system comprises a first water storage tank 23, a second circulating pump 24, a third circulating pump 25, a heat exchanger 26, a water cooling tower 27 and a first water return pipe 28, wherein the input end of the first water return pipe 28 is communicated with the water collecting pipeline 22 of the flue gas condensation system 4, the output end of the first water return pipe 28 is communicated with the water inlet of the first water storage tank 23, the input end of the second circulating pump 24 is communicated with the water outlet of the first water storage tank 23, the output end of the second circulating pump 24 is communicated with the circulating water input end of the heat exchanger 26, the circulating water output end of the heat exchanger 26 is communicated with the spray atomizer 18 of the flue gas condensation system 4, the input end of the third circulating pump 25 is communicated with the cold water output end of the water cooling tower 27, the output end of the third circulating pump 25 is communicated with the cooling water input end of the heat exchanger 26, cooling circulating water is cooled through the water cooling tower 27 and the heat exchanger 26, so that the condensation effect of the flue gas condensation system 4 on flue gas is guaranteed, and the heat exchanger 26 is one of the plate heat exchanger 26, the shell-and-tube heat exchanger 26 and the wide-runner plate heat exchanger 26.
Flue gas washing water supply system includes second aqua storage tank 29, fourth circulating pump 30 and second wet return 31, the input of second wet return 31 and flue gas washing system's water collecting pipe 22 intercommunication, the output of second wet return 31 and the water inlet intercommunication of second aqua storage tank 29, the input of fourth circulating pump 30 and the delivery port intercommunication of second aqua storage tank 29, the output of fourth circulating pump 30 and flue gas washing system spray atomizer 18 intercommunication, spray the flue gas through fourth circulating pump 30 with washing circulating water on to the flue gas purify.
First aqua storage tank 23 is installed on the top of second aqua storage tank 29, first aqua storage tank 23 and second aqua storage tank 29 integrated into one piece to be provided with curved surface heat-conducting plate 32 between first aqua storage tank 23 and second aqua storage tank 29, sparingly take up an area of the space, the centre is equipped with the curved surface baffle, intensity is high, and the water in the first basin can cool off the water in the second basin simultaneously.
The cooling pipeline 10 and the heating pipeline 12 are both serpentine pipelines, and H-shaped fins 33 are arranged on the outer sides of the serpentine pipelines, so that the heat efficiency is high, and the resistance is small.
Desulfurization system includes fifth circulating pump 34 and desulfurization spray set 35, desulfurization spray set 35 installs in the desulfurization purification tower, the input of fifth circulating pump 34 stretches into to the desulfurization purification tower in, the output and the desulfurization spray set 35 intercommunication of fifth circulating pump 34, and it is prior art to spray the desulfurization.
The dehydration demister 13 is provided with a plurality of groups to ensure the demisting effect on the flue gas.
When the wet desulphurization and whitening system is used, the flue gas cooler 9 is arranged to cool flue gas before desulphurization and then enter the desulphurization purification tower body 1; the ultra-low desulfurization of the flue gas is completed through a desulfurization absorption system 6, the flue gas is dehydrated and demisted through an S-shaped channel of a flue gas flow equalizing baffle plate, the purified flue gas is sprayed and washed through atomization of a flue gas purification system, the washed and purified flue gas is dehydrated and demisted through an S-shaped channel of a purified flue gas flow equalizing baffle plate, then the flue gas directly exchanges heat with sprayed circulating cooling water to realize cooling, condensation and dehumidification of the flue gas, the cooled and dehumidified flue gas is dehydrated through a 3-4-layer high-efficiency demister, the white smoke is further subjected to the whitening through an electromagnetic whitening device 14, the water vapor in the white smoke is subjected to the action of a pulse magnetic field, the water vapor can be converted into a liquid phase from a gas phase only by releasing a little energy at normal temperature and normal pressure, the water vapor is also adsorbed onto an electromagnetic screen after being condensed into small droplets, after the small droplets, the water vapor, a little dust and other impurities in the white, the effects of ultralow emission and whitening of flue gas are realized, scaling attached to the electromagnetic net can be washed once every period of time, and the first water pump 16 sprays the crystal washing spray pipe 17 to wash the structure on the electromagnetic net; the flue gas cooler 9 cools the flue gas, the flue gas heater 2 heats the flue gas, and water is circulated between the flue gas heater 2 and the flue gas cooler 9 through the first circulating pump 11, so that the cooling and heating of the flue gas are realized, the energy is saved, and finally the desulfurization and whitening of the flue gas are realized; increase flue gas cooler 9 and inside electromagnetism on current desulfurization purification tower body 1 basis and take off white device 14, convenient transformation, the transformation cost is lower, and occupation space is less, improves the practicality.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. A wet desulphurization and whitening system comprises a desulphurization purification tower body (1), wherein a flue gas heater (2), a demisting system (3), a flue gas condensing system (4), a flue gas washing and purifying system (5) and a desulphurization absorption system (6) are arranged in the desulphurization purification tower from top to bottom, an outlet flue (7) is arranged at the top end of the desulphurization purification tower, and an inlet flue (8) is arranged at the bottom of the outer side of the desulphurization purification tower; it is characterized by also comprising a flue gas cooler (9), a flue gas washing water supply system for providing circulating water for the flue gas washing system and a flue gas condensation water supply system for providing circulating cooling water for the flue gas condensation system (4), the output end of the flue gas cooler (9) is communicated with the inlet flue (8), a cooling pipeline (10) is arranged inside the flue gas cooler (9), the output end of the cooling pipeline (10) is provided with a first circulating pump (11), the interior of the flue gas heater (2) is provided with a heating pipeline (12), the output end of the first circulating pump (11) is communicated with the input end of the heating pipeline (12), the output end of the heating pipeline (12) is communicated with the input end of the cooling pipeline (10), the demisting system (3) comprises a dehydration demister (13) and an electromagnetic whiting device (14), the electromagnetic de-whitening device (14) is positioned above the dehydration demister (13).
2. The wet desulphurization and white removal system according to claim 1, further comprising a flushing device, wherein the flushing device comprises a first water tank (15), a first water pump (16) and a flushing spray pipe (17), the flushing spray pipe (17) is installed above the electromagnetic desulphurization device (14), a plurality of groups of flushing nozzles are arranged at the bottom end of the flushing spray pipe (17) in a communication manner, the input end of the first water pump (16) is communicated with the first water tank (15), and the output end of the first water pump (16) is communicated with the flushing spray pipe (17).
3. A wet desulphurization and whitening system according to claim 2, characterized in that the electromagnetic whitening means (14) is an electromagnetic screen.
4. The wet desulphurization and whitening system according to claim 3, wherein the flue gas condensing system (4) and the flue gas washing system each comprise a spray atomizer (18) and a flue gas flow equalizing plate (19), the flue gas flow equalizing plate (19) comprises a plurality of groups of upper semicircular tubes (20) and a plurality of groups of lower semicircular tubes (21), the plurality of groups of upper semicircular tubes (20) are respectively staggered with the plurality of groups of lower semicircular tubes (21), the opening directions of the plurality of groups of upper semicircular tubes (20) are downward, the opening directions of the plurality of groups of lower semicircular tubes (21) are upward, and a water collecting pipeline (22) is arranged at the bottom end of the plurality of groups of lower semicircular tubes (21).
5. The wet desulphurization and whitening system according to claim 4, wherein the flue gas condensation water supply system comprises a first water storage tank (23), a second circulating pump (24), a third circulating pump (25), a heat exchanger (26), a water cooling tower (27) and a first water return pipe (28), the input end of the first water return pipe (28) is communicated with the water collecting pipeline (22) of the flue gas condensation system (4), the output end of the first water return pipe (28) is communicated with the water inlet of the first water storage tank (23), the input end of the second circulating pump (24) is communicated with the water outlet of the first water storage tank (23), the output end of the second circulating pump (24) is communicated with the circulating water input end of the heat exchanger (26), the circulating water output end of the heat exchanger (26) is communicated with the spray atomizer (18) of the flue gas condensation system (4), the input end of the third circulating pump (25) is communicated with the cold water output end of the water cooling tower (27), the output end of the third circulating pump (25) is communicated with the cooling water input end of the heat exchanger (26), and the cooling water output end of the heat exchanger (26) is communicated with the spraying system of the water cooling tower (27).
6. The wet desulphurization and whitening system according to claim 5, wherein the flue gas washing water supply system comprises a second water storage tank (29), a fourth circulating pump (30) and a second water return pipe (31), the input end of the second water return pipe (31) is communicated with the water collecting pipeline (22) of the flue gas washing system, the output end of the second water return pipe (31) is communicated with the water inlet of the second water storage tank (29), the input end of the fourth circulating pump (30) is communicated with the water outlet of the second water storage tank (29), and the output end of the fourth circulating pump (30) is communicated with the spray atomizer (18) of the flue gas washing system.
7. The system according to claim 6, wherein the first water storage tank (23) is installed at the top end of the second water storage tank (29), the first water storage tank (23) and the second water storage tank (29) are integrally formed, and a curved heat conducting plate (32) is arranged between the first water storage tank (23) and the second water storage tank (29).
8. The wet desulphurization and whitening system according to claim 7, wherein the cooling pipeline (10) and the heating pipeline (12) are both serpentine pipelines, and the outer sides of the serpentine pipelines are provided with H-shaped fins (33).
9. The wet desulphurization and white precipitation system of claim 8, wherein the desulphurization system comprises a fifth circulating pump (34) and a desulphurization spray device (35), the desulphurization spray device (35) is installed in the desulphurization purification tower, the input end of the fifth circulating pump (34) extends into the desulphurization purification tower, and the output end of the fifth circulating pump (34) is communicated with the desulphurization spray device (35).
10. A wet desulphurization and whitening system according to claim 9, characterized in that the dewatering mist eliminator (13) is provided in a plurality of groups.
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