CN210891734U - Wet flue gas desulfurization waste heat recovery and white elimination system - Google Patents
Wet flue gas desulfurization waste heat recovery and white elimination system Download PDFInfo
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- CN210891734U CN210891734U CN201921138983.XU CN201921138983U CN210891734U CN 210891734 U CN210891734 U CN 210891734U CN 201921138983 U CN201921138983 U CN 201921138983U CN 210891734 U CN210891734 U CN 210891734U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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Abstract
The utility model provides a wet flue gas desulfurization waste heat recovery, white system disappears, this system include flue gas condensation white system, mechanical force ventilation cooling tower, flue gas heater, chimney, water pump, air leading heater, air heater, overgrate air fan disappear, wherein, condensation white system of disappearing includes flue gas condenser, defroster, water collecting bucket, the comdenstion water that flue gas condensation white system of disappearing produced assembles in the water collecting bucket, mechanical force ventilation cooling tower is connected to the water collecting bucket, flue gas after flue gas condensation white system of disappearing handles discharges behind flue gas heater and chimney. The utility model provides a wet desulphurization flue gas waste heat recovery and white elimination method, which adopts circulating water as a medium to recover flue gas waste heat so as to heat secondary air of a boiler and achieve the purpose of preventing an air preheater from being corroded; meanwhile, the discharged smoke is firstly condensed and then heated to form unsaturated smoke, pollutants in the smoke are deeply purified, an economical and feasible white smoke elimination circulating system is realized, and the environmental protection problem is solved.
Description
[ technical field ] A method for producing a semiconductor device
The utility model relates to a flue gas purification's technical field, especially a wet flue gas desulfurization waste heat recovery, white system disappears.
[ background of the invention ]
Boiler flue gas is always the key object for controlling pollutants and generally contains dust and SO2、NOXAnd the like, and a large amount of white smoke is generated in the discharging process. The existing colored smoke plume treatment technical route mainly comprises three types of condensation, heating and condensation reheating, wherein fluoroplastic, titanium pipes, 2205 and the like can be selected as heat exchange equipment materials, and a water spray, a phase change condenser, slurry condensation and the like can be selected as a condensation mode. Although the prior art can achieve the aim of white elimination, the effective utilization of the flue gas waste heat resources is usually ignored.
At present, the secondary air of a boiler is mostly heated by an air preheater, and in most areas of China, because the temperature of the secondary air inlet is too low, particularly in winter, the corrosion phenomenon of the air preheater often occurs, the operation of the system is seriously influenced, and meanwhile, the operation and maintenance cost is increased, and a wet desulphurization flue gas waste heat recovery and white elimination system is provided.
[ Utility model ] content
The utility model aims at solving the problem in the prior art, providing a wet flue gas desulfurization waste heat recovery, white system disappears, combines the requirement is administered to the colored plume of current part province and market to and boiler flue gas characteristics, equipment operation technology etc. realize the effective utilization to flue gas waste heat resource.
In order to realize the aim, the utility model provides a wet desulphurization flue gas waste heat recovery and white elimination system, which comprises a flue gas condensation white elimination system, a mechanical ventilation cooling tower, a flue gas heater, a chimney, a water pump, an air pre-heater, an air preheater and a secondary air blower, the flue gas condensation and white elimination system comprises a flue gas condenser, a demister and a water collecting hopper, the flue gas condensation and white elimination system is respectively connected with the air pre-heater and the mechanical ventilation cooling tower through a circulating cooling water pipeline G1 and a bypass thereof, cold air blown in by the secondary air fan enters the air pre-heater through an air pipe G2, the condensed water generated by the flue gas condensation and white elimination system is gathered in the water collecting hopper, the water collecting hopper is connected with the mechanical ventilation cooling tower through a condensed water pipeline G3, and the flue gas treated by the flue gas condensation and white removal system is sequentially connected with a flue gas heater and the chimney through a flue gas pipeline G4 and then is discharged.
Preferably, the flue gas condensation and white elimination system comprises a flue gas condenser, a demister and a water collecting hopper, wherein the flue gas condenser and the demister are sequentially arranged along the flue gas treatment direction, and the water collecting hopper is arranged below the flue gas condenser and the demister.
Preferably, the flue gas condenser is made of modified PTFE, the circulating cooling water pipeline G1 is connected with the flue gas condenser, and flue gas and circulating cooling water which pass through in a countercurrent mode exchange heat in the flue gas condenser.
Preferably, the demister is a plate demister, the number of layers is more than 2, and the layer spacing is 1.2-1.8 m.
Preferably, when the flow of the condensed water is large or buffering is needed, a condensed water tank, a pH meter and a liquid level meter are arranged at the lower part of the water collecting hopper, and a dosing device is arranged.
Preferably, the water pump includes a circulation cooling water pump installed on the condensed water pipe G3 and a condensed water pump installed on the circulation cooling water pipe G1.
Preferably, the air outlet end of the air pre-heater is connected with an air pre-heater, cold air passing through the air pre-heater in a countercurrent mode exchanges heat with circulating cooling water in the air pre-heater, secondary air primary heating is achieved, the purpose of preventing corrosion of the air pre-heater is achieved, and the air outlet end of the air pre-heater is connected with a boiler combustion system.
The utility model has the advantages that: the utility model discloses white system of flue gas disappears adopts air water heat transfer condensation reheat + overgrate air heat transfer technique, and flue gas after will desulfurizing gets into the white system of flue gas condensation that disappears, carries out condensation defogging and handles, and the flue gas temperature reduces to 45 ℃ -50 ℃, separates out the comdenstion water to the advanced purification flue gas, reduces the emission of pollutants such as dust, sulfur dioxide; the condensed flue gas discharged from the flue gas condensation and white elimination system enters a flue gas heater, and unsaturated flue gas is formed after the temperature is raised and is discharged through a chimney; condensed water collected by the water collecting hopper returns to the mechanical draft cooling tower for recycling, and the slightly acidic condensed water can reduce the acid adding amount of the mechanical draft cooling tower; the circulating cooling water absorbs the waste heat of the flue gas, then is heated, enters the air pre-heater to heat secondary air, and returns the circulating cooling water after heat exchange with the secondary air to the flue gas condensation and white elimination system for recycling. The utility model can recycle the condensed water and reduce the water consumption of the system; the secondary air is heated by indirectly utilizing the waste heat of the flue gas, so that the aim of preventing the air preheater from being corroded is fulfilled; the desulfurized flue gas is condensed and reheated to form unsaturated flue gas, so that an economically feasible white smoke plume elimination circulating system is realized, and the environmental protection problem is solved.
The features and advantages of the present invention will be described in detail by embodiments with reference to the accompanying drawings.
[ description of the drawings ]
Fig. 1 is a schematic structural diagram of a wet desulphurization flue gas waste heat recovery and white elimination system of the utility model.
[ detailed description ] embodiments
Example 1
Referring to fig. 1, the utility model relates to a wet flue gas desulfurization waste heat recovery and white elimination system, which comprises a flue gas condensation white elimination system 1, a mechanical draft cooling tower 2, a flue gas heater 3, a chimney 4, a water pump 5, an air pre-heater 6, an air pre-heater 7 and a secondary air fan 8, wherein the flue gas condensation white elimination system 1 comprises a flue gas condenser 11, a demister 12 and a water collecting bucket 13, the flue gas condenser 11 and the demister 12 are sequentially arranged along the flue gas treatment direction, the water collecting bucket 13 is arranged below the flue gas condenser 11 and the demister 12, the water pump 5 comprises a circulating cooling water pump 51 and a condensing water pump 52, the condensing water pump 52 is arranged on a condensing water pipeline G3, the circulating cooling water pump 51 is arranged on a circulating cooling water pipeline G1, the flue gas condensation white elimination system 1 is respectively connected with the air pre-heater 6 and the mechanical draft cooling tower 2 through a circulating cooling water pipeline G1 and a, the cold wind that is blown into by overgrate air fan 8 passes through tuber pipe G2 and gets into leading heater 6 of air, the comdenstion water that the white system 1 of flue gas condensation produced assembles in water collecting bucket 13, water collecting bucket 13 passes through condensate water pipeline G3 and connects mechanical draft cooling tower 2, flue gas after the white system 1 of flue gas condensation was handled connects gradually flue gas heater 3 through flue gas pipeline G4 and discharge behind the chimney 4.
Further, flue gas condenser 11 is the modified PTFE material, recirculated cooling water pipeline G1 links to each other with flue gas condenser 11, and the flue gas that passes through against the current is in with recirculated cooling water heat transfer in flue gas condenser 11. The demister 12 is a plate-type demister, the number of layers is more than 2, and the layer spacing is 1.2-1.8 m.
Furthermore, the air outlet end of the air pre-heater 6 is connected with an air pre-heater 7, cold air passing through in a countercurrent mode and circulating cooling water exchange heat in the air pre-heater 6, secondary air primary heating is achieved, the air pre-heater 7 is prevented from being corroded, and the air outlet end of the air pre-heater 7 is connected with a boiler combustion system.
Example 2
On the basis of the embodiment 1, the spray tower is used for replacing a flue gas condensation and white elimination system 1, a water collecting tank is additionally arranged below a water collecting hopper 13, instruments such as a pH meter and a liquid level meter are arranged, and a dosing system is arranged for conditioning so as to further recover flue gas waste heat, so that the energy consumption of the system is reduced, and the water supply circulation in a plant is ensured.
The utility model discloses well wet flue gas desulfurization waste heat recovery, the realization of white system that disappears specifically includes following step:
step 4, the cold air blown from the secondary air fan 8 sequentially enters the air pre-heater 6 and the air preheater 7 through an air pipe G2, and is conveyed to a boiler combustion system after being heated;
step 5, collecting condensed water generated by the flue gas condensation and white elimination system 1 in a water collecting hopper 13, wherein the condensed water is acidic and is conveyed to the mechanical ventilation cooling tower 2 as supplemented water through a condensed water pipeline G3;
and 6, enabling the desulfurized flue gas generated from the wet desulphurization system to sequentially enter the flue gas condensation and white elimination system 1 and the flue gas heater 3 through a flue gas pipeline G4, condensing and reheating the flue gas to form unsaturated flue gas, and finally discharging the unsaturated flue gas through a chimney 4.
The above-mentioned embodiment is right the utility model discloses an explanation, it is not right the utility model discloses a limited, any right the scheme after the simple transform of the utility model all belongs to the protection scope of the utility model.
Claims (7)
1. The utility model provides a wet flue gas desulfurization waste heat recovery, white system that disappears which characterized in that: comprises a flue gas condensation and white elimination system (1), a mechanical ventilation cooling tower (2), a flue gas heater (3), a chimney (4), a water pump (5), an air pre-heater (6), an air pre-heater (7) and a secondary air fan (8), wherein the flue gas condensation and white elimination system (1) comprises a flue gas condenser (11), a demister (12) and a water collecting hopper (13), the flue gas condensation and white elimination system (1) is respectively connected with the air pre-heater (6) and the mechanical ventilation cooling tower (2) through a circulating cooling water pipeline (G1) and a bypass thereof, cold air blown in by the secondary air fan (8) enters the air pre-heater (6) through an air pipe (G2), condensed water generated by the flue gas condensation and white elimination system (1) is gathered in the water collecting hopper (13), the water collecting hopper (13) is connected with the mechanical ventilation cooling tower (2) through a condensation water pipeline (G3), the flue gas after being treated by the flue gas condensation and white removal system (1) is sequentially connected with a flue gas heater (3) and the chimney (4) through a flue gas pipeline (G4) and then is discharged.
2. The wet desulphurization flue gas waste heat recovery and white elimination system of claim 1, wherein: the flue gas condensation and white elimination system (1) comprises a flue gas condenser (11), a demister (12) and a water collecting hopper (13), wherein the flue gas condenser (11) and the demister (12) are sequentially arranged along a flue gas treatment direction, and the water collecting hopper (13) is arranged below the flue gas condenser (11) and the demister (12).
3. The wet desulphurization flue gas waste heat recovery and white elimination system as claimed in claim 1 or 2, wherein: flue gas condenser (11) are the modified PTFE material, recirculated cooling water pipeline (G1) links to each other with flue gas condenser (11), and the flue gas that passes through against the current is in with recirculated cooling water heat transfer in flue gas condenser (11).
4. The wet desulphurization flue gas waste heat recovery and white elimination system as claimed in claim 1 or 2, wherein: the demister (12) is a plate-type demister, the number of layers is more than 2, and the layer spacing is 1.2-1.8 m.
5. The wet desulphurization flue gas waste heat recovery and white elimination system as claimed in claim 1 or 2, wherein: the lower part of the water collecting hopper (13) is provided with a condensed water tank, a pH meter and a liquid level meter, and is provided with a dosing device.
6. The wet desulphurization flue gas waste heat recovery and white elimination system of claim 1, wherein: the water pump (5) comprises a circulating cooling water pump (51) and a condensed water pump (52), the condensed water pump (52) is installed on a condensed water pipeline (G3), and the circulating cooling water pump (51) is installed on a circulating cooling water pipeline (G1).
7. The wet desulphurization flue gas waste heat recovery and white elimination system of claim 1, wherein: the air outlet end of the air pre-heater (6) is connected with an air pre-heater (7), cold air and circulating cooling water which pass through in a countercurrent mode exchange heat in the air pre-heater (6), secondary air primary heating is achieved, corrosion of the air pre-heater (7) is prevented, and the air outlet end of the air pre-heater (7) is connected with a boiler combustion system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921138983.XU CN210891734U (en) | 2019-07-19 | 2019-07-19 | Wet flue gas desulfurization waste heat recovery and white elimination system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201921138983.XU CN210891734U (en) | 2019-07-19 | 2019-07-19 | Wet flue gas desulfurization waste heat recovery and white elimination system |
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| CN210891734U true CN210891734U (en) | 2020-06-30 |
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| CN201921138983.XU Active CN210891734U (en) | 2019-07-19 | 2019-07-19 | Wet flue gas desulfurization waste heat recovery and white elimination system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110410811A (en) * | 2019-07-19 | 2019-11-05 | 浙江菲达环保科技股份有限公司 | A kind of recycling of wet desulfurization flue gas waste heat, disappear white system and method |
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2019
- 2019-07-19 CN CN201921138983.XU patent/CN210891734U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110410811A (en) * | 2019-07-19 | 2019-11-05 | 浙江菲达环保科技股份有限公司 | A kind of recycling of wet desulfurization flue gas waste heat, disappear white system and method |
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