CN214370319U - Flue gas waste heat recycling system - Google Patents
Flue gas waste heat recycling system Download PDFInfo
- Publication number
- CN214370319U CN214370319U CN202023304874.6U CN202023304874U CN214370319U CN 214370319 U CN214370319 U CN 214370319U CN 202023304874 U CN202023304874 U CN 202023304874U CN 214370319 U CN214370319 U CN 214370319U
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- CN
- China
- Prior art keywords
- flue gas
- waste heat
- flue
- gas condenser
- defroster
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 146
- 239000003546 flue gas Substances 0.000 title claims abstract description 146
- 239000002918 waste heat Substances 0.000 title claims abstract description 83
- 238000004064 recycling Methods 0.000 title claims description 14
- 238000011084 recovery Methods 0.000 claims abstract description 47
- 230000003009 desulfurizing effect Effects 0.000 claims abstract description 22
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 16
- 230000023556 desulfurization Effects 0.000 claims abstract description 16
- 238000010438 heat treatment Methods 0.000 claims abstract description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 58
- 238000000034 method Methods 0.000 claims description 15
- 239000000779 smoke Substances 0.000 claims description 10
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 claims description 6
- 229920002313 fluoropolymer Polymers 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 229910052719 titanium Inorganic materials 0.000 claims description 6
- 239000010936 titanium Substances 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 4
- 230000003020 moisturizing effect Effects 0.000 claims description 4
- 229910001039 duplex stainless steel Inorganic materials 0.000 claims description 3
- 238000010791 quenching Methods 0.000 claims 4
- 230000000171 quenching effect Effects 0.000 claims 4
- 238000005496 tempering Methods 0.000 claims 4
- 238000002485 combustion reaction Methods 0.000 abstract description 2
- 230000003750 conditioning effect Effects 0.000 description 9
- 238000009833 condensation Methods 0.000 description 2
- 230000005494 condensation Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- 239000003245 coal Substances 0.000 description 1
- 230000001143 conditioned effect Effects 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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Classifications
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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
- Y02E20/30—Technologies for a more efficient combustion or heat usage
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- Treating Waste Gases (AREA)
Abstract
The utility model provides a flue gas waste heat recovery utilizes system, including flue gas waste heat utilization equipment, flue gas condenser, defroster and condensate recovery system, flue gas waste heat utilization equipment connects between the outlet flue of boiler and the inlet flue of desulfurizing tower, flue gas condenser, defroster connect gradually between the inlet flue of the outlet flue of desulfurizing tower and chimney, be equipped with the waste heat recovery flue in the flue gas condenser, flue gas waste heat utilization equipment is connected to the output of waste heat recovery flue, flue gas waste heat utilization equipment is used for heating boiler exhaust flue gas, flue gas condenser, defroster are connected to condensate recovery system's input, desulfurizing tower and defroster are connected to condensate recovery system's output. This system can realize the recycle to desulfurization export low temperature flue gas, and the cold air after the intensification can get into the fan heater and carry out the secondary heating or directly get into air heater, participates in the boiler combustion.
Description
[ technical field ] A method for producing a semiconductor device
The utility model relates to a technical field that the flue gas was handled, especially a flue gas waste heat recovery utilizes system.
[ background of the invention ]
In the thermal power plant in China, 70-80% of the total heat loss of the boiler is the heat loss of the exhaust smoke. When the exhaust gas temperature rises by 10-15 ℃, the boiler efficiency is reduced by 1%, and the annual average standard coal consumption rises by 3-4 g/(kW.h). Along with the stricter policy of energy conservation and emission reduction and the continuous rising of energy price, the importance of reasonably utilizing the waste heat of the boiler flue gas is increasing. The most common mode in the traditional flue gas waste heat utilization modes is that rotary GGH or a flue gas cooler is arranged at the rear end of a boiler air preheater to absorb the flue gas waste heat of the boiler, and the absorbed flue gas waste heat directly heats flue gas at the inlet of a chimney.
The technical scheme has certain technical defects: the absorbed flue gas waste heat directly heats the flue gas at the inlet of the chimney. The mode is simple in energy utilization, and the excessive energy is output to the smoke exhaust of the chimney in the practical process, so that the energy waste is caused.
[ Utility model ] content
The utility model aims at solving the problem in the prior art, providing a flue gas waste heat recovery utilizes system, can realize the effective recycle to desulfurization export low temperature flue gas.
In order to achieve the above object, the utility model provides a flue gas waste heat recovery utilizes system, including flue gas waste heat utilization equipment, flue gas condenser, defroster and condensate recovery system, flue gas waste heat utilization equipment connects between the outlet flue of boiler and the inlet flue of desulfurizing tower, flue gas condenser, defroster connect gradually between the outlet flue of desulfurizing tower and the inlet flue of chimney, and the flue gas after flue gas condenser, defroster are handled passes through the flue gas pipeline and connects discharge behind the chimney, be equipped with the waste heat recovery flue in the flue gas condenser, the output of waste heat recovery flue is connected flue gas waste heat utilization equipment, heat transfer medium in the flue gas condenser absorbs the heat transfer waste heat and becomes thermal medium and carries to flue gas waste heat utilization equipment, flue gas waste heat utilization equipment is used for heating the flue gas that the boiler discharged, flue gas condenser, condensate recovery system's input connection flue gas condenser, defroster, The defroster for collect the comdenstion water of flue gas after cooling down in flue gas condenser, the defroster, desulfurizing tower and defroster are connected to comdenstion water recovery system's output, be equipped with conditioning device in the comdenstion water recovery system, through conditioning device regulation PH value's comdenstion water input desulfurizing tower and defroster, wash the water with as desulfurizing tower moisturizing and defroster.
Preferably, the flue gas waste heat utilization device is an air preheater, the fan is arranged at the inlet end of a waste heat recovery flue of the flue gas condenser and used for inputting cold air, the outlet end of the waste heat recovery flue of the flue gas condenser is connected with the air preheater through a flue, the outlet end of the air preheater is connected with a boiler through a flue, and heat exchange media in the flue gas condenser absorb heat exchange waste heat and then become hot air and are sent into the boiler through the air preheater.
As preferred, still include fan and low temperature economizer, the fan is primary air fan or secondary air fan, flue gas waste heat utilization equipment is the air heater, flue gas condenser, low temperature economizer, air heater pass through the waste heat recovery flue and connect gradually and form closed circulation, flue gas condenser's waste heat recovery flue exit end passes through the flue and links to each other with low temperature economizer, the output of low temperature economizer links to each other with the air heater, the output of air heater disposes the fan to it is continuous with flue gas condenser's waste heat recovery flue entrance point.
Preferably, the heat exchange material of the low-temperature economizer is titanium tube or fluoroplastic or 316L or above duplex stainless steel.
Preferably, the heat exchange material of the flue gas condenser is a titanium tube or fluoroplastic.
Preferably, the condensate recovery system further comprises a water collecting bucket arranged at the bottom of the flue gas condenser and the demister, a desulfurization process water tank and a condensate pump, wherein the water collecting bucket is used for collecting condensate water of flue gas after the flue gas condenser and the demister discharge are cooled, the conditioning device is used for adjusting the pH value of the condensate water collected by the water collecting bucket, the output end of the water collecting bucket is connected with the desulfurization process water tank through the condensate pump, the condensate water after conditioning is conveyed to the desulfurization process water tank through the condensate pump, and the desulfurization process water tank is respectively connected with the desulfurization tower and the demister through a water replenishing pipeline and a water flushing pipeline.
Preferably, the heat exchange medium of the flue gas condenser is cold air.
The utility model has the advantages that:
1. this system can realize the recycle to desulfurization export low temperature flue gas, and the cold air after the intensification can get into the fan heater and carry out the secondary heating or directly get into air heater, participates in the boiler combustion.
2. When the air preheater is used as a flue gas waste heat utilization device, the investment of equipment such as a fan heater and the like can be saved or reduced, and the investment and the operation cost are reduced.
3. Has certain water-saving effect.
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 an embodiment 1 of a flue gas waste heat recycling system of the present invention;
fig. 2 is a schematic structural diagram of embodiment 2 of the flue gas waste heat recycling system of the present invention.
[ detailed description ] embodiments
Example 1
Referring to fig. 1, the utility model relates to a flue gas waste heat recycling system, which comprises a flue gas waste heat utilization device, a flue gas condenser 3, a demister 4 and a condensate water recycling system 5, wherein the flue gas waste heat utilization device is connected between a smoke outlet of a boiler 10 and a smoke inlet of a desulfurizing tower 20, the flue gas condenser 3 and the demister 4 are sequentially connected between the smoke outlet of the desulfurizing tower 20 and the smoke inlet of a chimney 30, flue gas treated by the flue gas condenser 3 and the demister 4 is discharged after being connected with the chimney 30 through a flue gas pipeline, a waste heat recycling flue is arranged in the flue gas condenser 3, the output end of the waste heat recycling flue is connected with the flue gas waste heat utilization device, a heat exchange medium in the flue gas condenser 3 absorbs heat exchange waste heat and then becomes a heat medium which is conveyed to the flue gas waste heat utilization device, and the flue gas waste heat utilization device is used for heating flue gas discharged by the boiler 10, flue gas condenser 3, defroster 4 are connected to condensate recovery system 5's input for collect the comdenstion water of cooling back flue gas in flue gas condenser 3, the defroster 4, desulfurizing tower 20 and defroster 4 are connected to condensate recovery system 5's output, be equipped with conditioning device in the condensate recovery system 5, through conditioning device adjust the comdenstion water input desulfurizing tower 20 and defroster 4 of pH value, as desulfurizing tower 20 moisturizing and defroster 4 wash water. In this embodiment, the waste heat recovery system can replace the function of fan heater that can be fine, can cancel the configuration of fan heater in practical application.
Further, still include fan 2, fan 2 is primary air fan or secondary air fan, flue gas waste heat utilization equipment is air heater 11, fan 2 sets up in flue gas condenser 3's waste heat recovery flue entrance point for the input cold air, flue gas condenser 3's waste heat recovery flue exit end passes through the flue and links to each other with air heater 11, boiler 10 is connected through the flue to air heater 11's exit end, heat transfer medium among the flue gas condenser 3 absorbs the heat transfer waste heat and becomes hot-air after, and sends into boiler 10 through air heater 11.
Furthermore, the heat exchange material of the flue gas condenser 3 is titanium tube or fluoroplastic, and the flue gas condenser has strong corrosion resistance and higher heat exchange effect.
Further, the condensate recovery system 5 further includes a water collecting bucket 51, a desulfurization process water tank 52 and a condensate pump 53, the water collecting bucket 51 is used for collecting condensate water of cooled flue gas discharged from the flue gas condenser 3 and the demister 4, the conditioning device is used for adjusting the PH value of the condensate water collected by the water collecting bucket 51, the output end of the water collecting bucket 51 is connected with the desulfurization process water tank 52 through the condensate pump 53, the condensate water pump 53 conveys the conditioned condensate water to the desulfurization process water tank 52, and the desulfurization process water tank 52 is respectively connected with the desulfurizing tower 20 and the demister 4 through a water replenishing pipeline and a water flushing pipeline.
Further, the heat exchange medium of the flue gas condenser 3 is cold air.
The working process of the embodiment:
the utility model relates to a flue gas waste heat recovery utilizes system, in embodiment 1, connect flue gas condenser 3, air heater 11 through the flue pipe way, utilize the flue gas to act as the heat transfer medium, become hot-air admission air heater 1 through air heater 11 after cold air absorbs flue gas condenser 3's the waste heat to get into the boiler at last, accomplish waste heat recovery. The flue gas treated by the air preheater 11, the flue gas condenser 3 and the demister 4 is discharged after passing through a flue gas pipeline connecting chimney 20. The condensed water of the cooled flue gas in the flue gas condensation system is gathered in the water collecting hopper 51, the PH value is adjusted to 7 by the conditioning device, and then the condensed water is used as the water replenishing of the desulfurizing tower 10 and the washing water of the demister 4.
Example 2
Referring to fig. 2, the difference between this embodiment and embodiment 1 is: still include low temperature economizer 6, flue gas waste heat utilization equipment is fan heater 12, flue gas condenser 3, low temperature economizer 6, fan heater 12 connect gradually through the waste heat recovery flue and form the closed circulation, flue gas condenser 3's waste heat recovery flue exit end passes through the flue and links to each other with low temperature economizer 6, low temperature economizer 6's output links to each other with fan heater 12, fan 2 is set to the output of fan heater 12 to it links to each other with flue gas condenser 3's waste heat recovery flue entrance point.
Further, the heat exchange material of the low-temperature economizer 6 is titanium tube, fluoroplastic, 316L or above duplex stainless steel. The heat recovered by waste heat can be more by connecting the low-temperature economizer, and the temperature of the heat exchange medium is improved
The working process of the embodiment:
the utility model relates to a flue gas waste heat recovery utilizes system, in embodiment 2, form the closed loop with flue gas condenser 3 and low temperature economizer 6 and 12 three kinds of equipment connection of warm braw ware through the flue, utilize the air in the flue to act as the medium and absorb flue gas waste heat of flue gas condenser 3, low temperature economizer 6 and heat the flue gas of warm braw ware 12, return flue gas condenser 3 at last. The flue gas treated by the air heater 12, the low-temperature economizer 6, the flue gas condenser 3 and the demister 4 is discharged after being connected with a chimney 20 through a flue gas pipeline. The condensed water of the cooled flue gas in the flue gas condensation system is gathered in the water collecting hopper 51, the PH value is adjusted to 7 by the conditioning device, and then the condensed water is used as the water replenishing of the desulfurizing tower 10 and the washing water of the demister 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 flue gas waste heat recovery utilizes system which characterized in that: the device comprises a flue gas waste heat utilization device, a flue gas condenser (3), a demister (4) and a condensate water recovery system (5), wherein the flue gas waste heat utilization device is connected between a smoke outlet of a boiler (10) and a smoke inlet of a desulfurizing tower (20), the flue gas condenser (3) and the demister (4) are sequentially connected between the smoke outlet of the desulfurizing tower (20) and the smoke inlet of a chimney (30), flue gas treated by the flue gas condenser (3) and the demister (4) is connected with the chimney (30) through a flue gas pipeline and then discharged, a waste heat recovery flue is arranged in the flue gas condenser (3), the output end of the waste heat recovery flue is connected with the flue gas waste heat utilization device, a heat exchange medium in the flue gas condenser (3) absorbs heat exchange waste heat and then becomes a heat medium which is conveyed to the flue gas waste heat utilization device, and the flue gas waste heat utilization device is used for heating the flue gas discharged by the boiler (10), flue gas condenser (3), defroster (4) are connected to the input of condensate recovery system (5) for collect the comdenstion water of cooling back flue gas in flue gas condenser (3), defroster (4), desulfurizing tower (20) and defroster (4) are connected to the output of condensate recovery system (5), be equipped with the quenching and tempering device in condensate recovery system (5), through the comdenstion water input desulfurizing tower (20) and defroster (4) of quenching and tempering device regulation pH value, as desulfurizing tower (20) moisturizing and defroster (4) wash water.
2. The flue gas waste heat recycling system according to claim 1, characterized in that: still include fan (2), fan (2) are primary air fan or secondary air fan, flue gas waste heat utilization equipment is air heater (11), fan (2) set up in the waste heat recovery flue entrance point of flue gas condenser (3) for the input cold air, the waste heat recovery flue exit end of flue gas condenser (3) passes through the flue and links to each other with air heater (11), boiler (10) are connected through the flue to the exit end of air heater (11), heat transfer medium among flue gas condenser (3) absorbs and becomes hot-air after the heat transfer waste heat to send into boiler (10) through air heater (11).
3. The flue gas waste heat recycling system according to claim 1, characterized in that: still include fan (2) and low temperature economizer (6), fan (2) are primary air fan or secondary fan, flue gas waste heat utilization equipment is warm braw ware (12), flue gas condenser (3), low temperature economizer (6), warm braw ware (12) connect gradually through the waste heat recovery flue and form the closed circulation, the waste heat recovery flue exit end of flue gas condenser (3) passes through the flue and links to each other with low temperature economizer (6), the output of low temperature economizer (6) links to each other with warm braw ware (12), fan (2) are set to the output of warm braw ware (12) to it links to each other with the waste heat recovery flue entrance point of flue gas condenser (3).
4. The flue gas waste heat recycling system according to claim 3, characterized in that: the heat exchange material of the low-temperature economizer (6) adopts titanium tubes or fluoroplastic or 316L or above duplex stainless steel.
5. The flue gas waste heat recycling system according to claim 1, characterized in that: the heat exchange material of the flue gas condenser (3) is titanium tube or fluoroplastic.
6. The flue gas waste heat recycling system according to claim 1, characterized in that: condensate recovery system (5) still including setting up in collecting hopper (51) and desulfurization process water tank (52), condensate pump (53) of flue gas condenser (3), defroster (4) bottom, collecting hopper (51) are used for collecting the condensate water of flue gas behind flue gas condenser (3), defroster (4) exhaust cooling, quenching and tempering device is used for adjusting the pH value of collecting the condensate water that collecting hopper (51) collected, the output of collecting hopper (51) is connected with desulfurization process water tank (52) through condensate pump (53), condensate pump (53) carry the condensate water after the quenching and tempering to desulfurization process water tank (52), desulfurization process water tank (52) are connected with desulfurizing tower (20) and defroster (4) respectively through moisturizing pipeline, wash with the water pipeline.
7. The flue gas waste heat recycling system according to claim 1, characterized in that: and the heat exchange medium of the flue gas condenser (3) is cold air.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023304874.6U CN214370319U (en) | 2020-12-31 | 2020-12-31 | Flue gas waste heat recycling system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023304874.6U CN214370319U (en) | 2020-12-31 | 2020-12-31 | Flue gas waste heat recycling system |
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| Publication Number | Publication Date |
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| CN214370319U true CN214370319U (en) | 2021-10-08 |
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| CN202023304874.6U Active CN214370319U (en) | 2020-12-31 | 2020-12-31 | Flue gas waste heat recycling system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112728573A (en) * | 2020-12-31 | 2021-04-30 | 浙江菲达环保科技股份有限公司 | Flue gas waste heat recycling system |
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- 2020-12-31 CN CN202023304874.6U patent/CN214370319U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112728573A (en) * | 2020-12-31 | 2021-04-30 | 浙江菲达环保科技股份有限公司 | Flue gas waste heat recycling system |
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