CN219433232U - Flue gas waste heat recovery system used after quench tower - Google Patents
Flue gas waste heat recovery system used after quench tower Download PDFInfo
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- CN219433232U CN219433232U CN202320808142.5U CN202320808142U CN219433232U CN 219433232 U CN219433232 U CN 219433232U CN 202320808142 U CN202320808142 U CN 202320808142U CN 219433232 U CN219433232 U CN 219433232U
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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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Abstract
The utility model provides a flue gas waste heat recovery system used after a quenching tower. The system for recovering the waste heat of the flue gas after the quenching tower comprises a hot water system, a steam generation system and a flue gas treatment system after the quenching tower; the hot water system comprises a tubular waste heat exchanger, a heat storage water tower and a hot water chamber which are connected in sequence; the steam generation system comprises an evaporation chamber, a superheat chamber and a steam compressor which are connected in sequence; the flue gas treatment system after the quenching tower comprises a spray desulfurizing tower, a superheat chamber, an activated carbon absorber, a bag-type dust collector, an evaporating chamber, a hot water chamber, a residual heat exchanger and finally is discharged into the atmosphere. The system for recycling the waste heat of the flue gas after the quenching tower can enable the waste heat utilization rate of the flue gas after the quenching tower to reach 70% -80%, and can efficiently recycle the waste heat of the flue gas after the quenching tower, thereby not only obtaining hot water, but also obtaining high-quality steam.
Description
Technical Field
The utility model relates to the technical field of combustion flue gas waste heat recovery, in particular to a flue gas waste heat recovery system used after a quenching tower.
Background
For flue gas generated by electronic waste pyrometallurgy and hazardous waste incineration, in order to reduce the generation of dioxin, a quenching tower is generally required to reduce the temperature of the flue gas 1S at 500-600 ℃ to 200-250 ℃, the flue gas waste heat after the quenching tower accounts for 25-30% of the total energy input, and the flue gas waste heat is recycled, so that the method has economic value, and the existing energy utilization efficiency is to be improved.
Disclosure of Invention
Based on the above, the utility model provides a flue gas waste heat recovery system used after the quenching tower, which can ensure that the waste heat utilization rate of the flue gas after the quenching tower reaches 70% -80%, and the flue gas waste heat after the quenching tower is recovered with high efficiency, so that hot water can be obtained, and high-quality steam can be obtained.
The utility model provides a system for recovering waste heat of flue gas after a quenching tower, which consists of a hot water system, a steam generation system and a flue gas treatment system after the quenching tower, wherein the hot water system is used for providing normal-pressure high-temperature hot water for the steam generation system, and the flue gas treatment system after the quenching tower is used for providing heat sources for the hot water system and the steam generation system;
the hot water system comprises a tubular waste heat exchanger, a heat storage water tower and a hot water chamber which are sequentially connected, normal-temperature soft water enters the tubular waste heat exchanger to exchange heat with flue gas outside a tube, the flowing medium-temperature hot water is sent to and stored in the heat storage water tower, the medium-temperature hot water of the heat storage water tower is sent to the hot water chamber to exchange heat with flue gas in a heat exchange flue, and normal-pressure high-temperature hot water is obtained;
the steam generation system comprises an evaporation chamber, a superheat chamber and a steam compressor; the evaporation chamber is connected with the hot water chamber through a communicating pipe with a valve, and vaporized low-pressure steam flows to the steam compressor through the overheating chamber;
the flue gas treatment system after the quenching tower comprises a heat-exchange chamber, an activated carbon adsorber, a bag-type dust remover, a heat exchange flue and a spray desulfurization tower; after the flue gas comes out of the quenching tower, the temperature of the flue gas is further reduced in the heat exchange flue through the activated carbon adsorber and the bag-type dust collector after the heat exchange between the superheat chamber and the low-pressure steam, and the flue gas is desulfurized in the spray desulfurization tower and discharged to the outside through the tubular waste heat exchanger.
Furthermore, a heat storage water tank is arranged between the tubular waste heat exchanger and the hot water chamber, and the tubular waste heat exchanger is made of hastelloy with acid corrosion resistance.
Further, the superheating chamber is arranged between the quenching tower and the activated carbon adsorber.
Furthermore, the cavity wall of the hot water chamber is a horizontal cylinder, the bottom of the hot water chamber is provided with a steam pipe orifice, and the top of the hot water chamber is provided with an emptying port.
Furthermore, the cavity wall of the evaporation chamber is a horizontal cylinder, baffle plates with the same interval are arranged at the bottom of the evaporation chamber in a staggered manner, a steam outlet connected with the overheating chamber is arranged at the top of the evaporation chamber, and the material of the contact part of the evaporation chamber and the flue gas is hastelloy.
Furthermore, the top of the heat exchange flue is composed of the bottom of the hot water chamber and the bottom of the evaporation chamber, and the two sides and the bottom of the heat exchange flue are formed by stacking sulfuric acid corrosion resistant silica bricks.
Further, the hot water room includes first hot water room main part and locates the second hot water room main part at first hot water room main part top, first hot water room main part is by heat transfer flue side wall and locate bearing wall in the heat transfer flue side wall constitutes, the surface of first hot water room main part is equipped with the heat preservation, the steam mouth of pipe has been seted up in the first hot water room main part, the steam mouth of pipe intercommunication external world with the inner chamber of second hot water room main part, the evacuation mouth has been seted up in the second hot water room main part.
Further, the evaporating chamber comprises a first evaporating chamber body and a second evaporating chamber body arranged at the top of the first evaporating chamber body, the first evaporating chamber body is composed of a heat exchange flue side wall and a bearing wall arranged in the heat exchange flue side wall, an insulating layer is arranged on the outer surface of the first evaporating chamber body, a baffle plate is arranged in the second evaporating chamber body, and a low-pressure steam outlet is formed in the second evaporating chamber body.
Compared with the prior art, the utility model has the following advantages:
the utility model relates to a flue gas waste heat recovery system after a quenching tower, which comprises a hot water system, a steam generation system and a flue gas treatment system after the quenching tower; the hot water system comprises a tubular waste heat exchanger, a heat storage water tower and a hot water chamber which are connected in sequence; the steam generation system comprises an evaporation chamber, a superheat chamber and a steam compressor which are connected in sequence; the flue gas treatment system after the quenching tower comprises a superheat chamber, an activated carbon absorber, a bag-type dust collector, an evaporating chamber, a hot water chamber, a waste heat exchanger and a spray desulfurizing tower which are sequentially connected, and finally the flue gas is discharged into the atmosphere.
The normal-pressure medium-temperature hot water and the normal-pressure high-temperature hot water generated by the hot water system can be used for supplying domestic hot water, boiler water inlet of a waste heat boiler in front of the quenching tower, office heating hot water in winter and the like; the steam generated by the steam generation system can be used for drying sludge, a three-effect evaporator, living heating, takeaway and the like; the heat sources of the hot water and the high-quality steam are flue gas, so that heat emptying waste is reduced, energy utilization efficiency is improved, and economic benefits of enterprises are increased.
Drawings
FIG. 1 is a schematic diagram of a system for recovering residual heat from flue gas after a quench tower according to the present utility model;
FIG. 2 is a schematic process flow diagram of the post quench tower flue gas waste heat recovery system shown in FIG. 1;
FIG. 3 is a transverse cross-sectional view of the hot water chamber and heat exchange flue of FIG. 1;
FIG. 4 is a transverse cross-sectional view of the vaporization chamber and heat exchange flue shown in FIG. 1;
FIG. 5 is a longitudinal view of the hot water chamber, evaporation chamber and heat exchange flue of FIG. 1;
in the figure: 1. a quenching tower; 2. a heat-exchange chamber; 3. an activated carbon adsorber; 4. a bag-type dust collector; 5. an evaporation chamber; 6. a baffle plate; 7. a communicating pipe; 8. a hot water chamber; 9. a heat storage water tower; 10. a tubular waste heat exchanger; 11. spraying a desulfurizing tower; 12. a vapor compressor; 13. a heat exchange flue; 14. a steam pipe orifice; 15. an evacuation port; 16. a heat preservation layer; 17. side walls of the heat exchange flue; 18. a bearing wall; 19. a low pressure steam outlet.
Detailed Description
The following description of the embodiments of the present utility model will be made more fully hereinafter with reference to the accompanying drawings, in which embodiments of the utility model are shown, rather than in all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.
Referring to fig. 1-5, the present utility model provides a flue gas waste heat recovery system after a quench tower, which is composed of a hot water system, a steam generation system and a flue gas treatment system after a quench tower, wherein the hot water system is used for providing normal pressure high temperature hot water for the steam generation system, and the flue gas treatment system after a quench tower is used for providing heat sources for the hot water system and the steam generation system;
the hot water system comprises a tubular waste heat exchanger 10, a heat storage water tower 9 and a hot water chamber 8 which are sequentially connected, normal-temperature soft water enters the tubular waste heat exchanger to exchange heat with flue gas outside a tube, the flowing medium-temperature hot water is sent to and stored in the heat storage water tower, and the medium-temperature hot water of the heat storage water tower is sent to the hot water chamber to exchange heat with the flue gas in a heat exchange flue to obtain normal-pressure high-temperature hot water;
the steam generation system comprises an evaporation chamber 5, a superheating chamber 2 and a steam compressor 12; the evaporation chamber is connected with the hot water chamber through a communicating pipe with a valve, and vaporized low-pressure steam flows to the steam compressor through the overheating chamber;
the flue gas treatment system after the quenching tower comprises a heat-exchange chamber 2, an activated carbon adsorber 3, a bag-type dust remover 4, a heat exchange flue 13 and a spray desulfurization tower 11; after the flue gas comes out of the quenching tower, the temperature of the flue gas is further reduced in the heat exchange flue through the activated carbon adsorber and the bag-type dust collector after the heat exchange between the superheat chamber and the low-pressure steam, and the flue gas is desulfurized in the spray desulfurization tower and discharged to the outside through the tubular waste heat exchanger.
The pulse air source of the bag-type dust collector is steam generated by a steam generation system.
The hot water chamber and the evaporating chamber are not in the same horizontal line, the height difference exists, the hot water chamber end is high, the valve is opened, and normal-pressure high-temperature hot water can flow from the hot water chamber to the evaporating chamber according to the gravity difference.
Furthermore, a heat storage water tank is arranged between the tubular waste heat exchanger and the hot water chamber, and the tubular waste heat exchanger is made of hastelloy with acid corrosion resistance.
Further, the superheating chamber is arranged between the quenching tower and the activated carbon adsorber.
Furthermore, the cavity wall shape of the hot water chamber is a horizontal cylinder, a steam pipe orifice 14 is arranged at the bottom of the hot water chamber, the main purpose is to increase disturbance and strengthen heat exchange, meanwhile, a small amount of heat is provided for heating hot water, an evacuation port 15 is arranged at the top of the hot water chamber and used for discharging a small amount of steam and air in the hot water, and the material of the part contacted with flue gas is hastelloy.
Furthermore, the cavity wall of the evaporation chamber is a horizontal cylinder, baffle plates with the same interval are arranged at the bottom of the evaporation chamber in a staggered manner, a steam outlet connected with the overheating chamber is arranged at the top of the evaporation chamber, and the material of the contact part of the evaporation chamber and the flue gas is hastelloy.
Furthermore, the top of the heat exchange flue is composed of the bottom of the hot water chamber and the bottom of the evaporation chamber, and the two sides and the bottom of the heat exchange flue are formed by stacking sulfuric acid corrosion resistant silica bricks.
Further, the hot water room includes first hot water room main part and locates the second hot water room main part at first hot water room main part top, first hot water room main part is by heat transfer flue side wall 17 with locate bearing wall 18 in the heat transfer flue side wall constitutes, the surface of first hot water room main part is equipped with heat preservation 16, the steam mouth of pipe 14 has been seted up in the first hot water room main part, the steam mouth of pipe intercommunication external world with the inner chamber of second hot water room main part, the evacuation mouth of pipe 15 has been seted up in the second hot water room main part.
Further, the evaporating chamber comprises a first evaporating chamber body and a second evaporating chamber body arranged at the top of the first evaporating chamber body, the first evaporating chamber body is composed of a heat exchange flue side wall 17 and a bearing wall 18 arranged in the heat exchange flue side wall, an insulating layer 16 is arranged on the outer surface of the first evaporating chamber body, a baffle plate 6 is arranged in the second evaporating chamber body, and a low-pressure steam outlet 19 is formed in the second evaporating chamber body.
The utility model provides a flue gas waste heat recovery system used after a quenching tower, which is used for the flue gas treatment process flow, wherein after the flue gas comes out of the quenching tower 1, the flue gas temperature is 200-240 ℃, after the steam is overheated in a superheating chamber 2, the flue gas temperature is reduced to 180-200 ℃, then the flue gas passes through an activated carbon adsorber 3 and a bag dust collector 4, the flue gas temperature is reduced to 160-170 ℃, then the flue gas is circulated in a heat exchange flue 13, the flue gas exchanges heat with low-pressure high-temperature hot water (> 95 ℃) hot water in an evaporating chamber 5 to evaporate the flue gas, the flue gas temperature is reduced to 130 ℃, the flue gas continues to circulate in the heat exchange flue 13, exchanges heat with low-pressure medium-temperature hot water (60-80 ℃) hot water in a hot water chamber 8, the flue gas temperature is reduced to 105 ℃, then exchanges heat with softened normal-temperature water in a tubular waste heat exchanger 10, the flue gas is reduced to 95 ℃, and finally, a spray desulfurizing tower 11 is used for desulfurizing and discharging the flue gas into the atmosphere.
Referring to fig. 1 and 2, the hot water generating process includes that normal temperature softened water enters a tubular waste heat exchanger 10 to exchange heat with flue gas, the water temperature rises to 60-80 ℃, the water is stored in a heat storage water tower 9, hot water in the water storage tower 9 enters a hot water chamber 8 to exchange heat with flue gas, the water temperature rises to 95 ℃ to be used by an evaporation chamber 5, and in addition, the hot water in the water storage water tower 9 and the hot water chamber 5 can be used by other parts requiring hot water.
Referring to fig. 1 and 2, the high quality steam generating process is that hot water of 95 ℃ in the hot water chamber 8 enters the evaporating chamber 5 to exchange heat with flue gas for evaporation, then enters the heat-exchange chamber 2 to heat up and overheat, and enters the steam compressor 12 for compression after overheat, so as to obtain high quality steam meeting requirements, and the high quality steam can be used for sludge drying, triple effect evaporators, living heating and other suitable steam places.
Referring to fig. 1, a hot water chamber 8 is communicated with an evaporation chamber 5 through a communicating pipe 7 with a valve, and is not on the same horizontal line with two ports of the communicating pipe, a height difference exists, the hot water chamber end is high, the valve is opened, hot water in the hot water chamber 8 enters the evaporation chamber 5 under the action of gravity, the hot water chamber 8 and the evaporation chamber 5 are finally at the same water level along with the time, but the water level is reduced due to the evaporation of hot water in the evaporation chamber 5, and the hot water continuously enters the evaporation chamber 5 from the hot water chamber 8 through the communicating pipe 7.
Referring to fig. 3 and 5, the hot water chamber 8 is a horizontal cylinder, and is mainly used for heating the intermediate-temperature hot water at 60-80 ℃ from the heat storage water tower 9 to 95 ℃. The bottom of the hot water chamber 8 is provided with a steam row of steam pipe openings 14, and the main purpose is that steam enters, so that strong disturbance is formed, heat exchange is enhanced, and a small amount of heat is provided for heating hot water. The top of the hot water chamber 8 is provided with an evacuation port 15 for evacuating a small amount of steam and air from the hot water. The material of the contact part of the hot water chamber 8 and the flue gas is hastelloy with acid corrosion resistance, and the other parts are 304 stainless steel.
Referring to fig. 4 and 5, the evaporating chamber 5 is in the form of a horizontal cylinder, and is operative to evaporate 95 ℃ hot water from the hot water chamber 8 and to deliver it to the superheating chamber 2 through the top steam outlet 14. The bottom of the cylinder of the evaporating chamber 5 is provided with equidistant staggered baffle plates 6, and as the hot water is continuously evaporated and the evaporation capacity near the flue gas inlet section is maximum, the hot water in the evaporating chamber 5 is in a flowing state, the staggered baffle plates 6 can increase flow disturbance and strengthen heat exchange. The material of the contact part of the hot water chamber 8 and the flue gas is hastelloy with acid corrosion resistance, and the other parts are 304 stainless steel.
The utility model relates to a flue gas waste heat recovery system after a quenching tower, which comprises a hot water system, a steam generation system and a flue gas treatment system after the quenching tower; the hot water system comprises a tubular waste heat exchanger, a heat storage water tower and a hot water chamber which are connected in sequence; the steam generation system comprises an evaporation chamber, a superheat chamber and a steam compressor which are connected in sequence; the flue gas treatment system after the quenching tower comprises a superheat chamber, an activated carbon absorber, a bag-type dust collector, an evaporating chamber, a hot water chamber, a waste heat exchanger and a spray desulfurizing tower which are sequentially connected, and finally the flue gas is discharged into the atmosphere.
The normal-pressure medium-temperature hot water and the normal-pressure high-temperature hot water generated by the hot water system can be used for supplying domestic hot water, boiler water inlet of a waste heat boiler in front of the quenching tower, office heating hot water in winter and the like; the steam generated by the steam generation system can be used for drying sludge, a three-effect evaporator, living heating, takeaway and the like; the heat sources of the hot water and the high-quality steam are flue gas, so that heat emptying waste is reduced, energy utilization efficiency is improved, and economic benefits of enterprises are increased.
Finally, it should be noted that: the foregoing description is only a preferred embodiment of the present utility model, and although the present utility model has been described in detail with reference to the foregoing embodiment, it will be apparent to those skilled in the art that modifications may be made to the technical solution described in the foregoing embodiment, or equivalents may be substituted for some of the technical features thereof, and any modifications, equivalents, improvements or changes thereof may be made without departing from the spirit and principle of the present utility model.
Claims (8)
1. A flue gas waste heat recovery system behind quench tower, its characterized in that: the system comprises a hot water system, a steam generation system and a quenching tower post-flue gas treatment system, wherein the hot water system is used for providing normal-pressure high-temperature hot water for the steam generation system, and the quenching tower post-flue gas treatment system is used for providing heat sources for the hot water system and the steam generation system;
the hot water system comprises a tubular waste heat exchanger, a heat storage water tower and a hot water chamber which are sequentially connected, normal-temperature soft water enters the tubular waste heat exchanger to exchange heat with flue gas outside a tube, the flowing medium-temperature hot water is sent to and stored in the heat storage water tower, the medium-temperature hot water of the heat storage water tower is sent to the hot water chamber to exchange heat with flue gas in a heat exchange flue, and normal-pressure high-temperature hot water is obtained;
the steam generation system comprises an evaporation chamber, a superheat chamber and a steam compressor; the evaporation chamber is connected with the hot water chamber through a communicating pipe with a valve, and vaporized low-pressure steam flows to the steam compressor through the overheating chamber;
the flue gas treatment system after the quenching tower comprises a heat-exchange chamber, an activated carbon adsorber, a bag-type dust remover, a heat exchange flue and a spray desulfurization tower; after the flue gas comes out of the quenching tower, the temperature of the flue gas is further reduced in the heat exchange flue through the activated carbon adsorber and the bag-type dust collector after the heat exchange between the superheat chamber and the low-pressure steam, and the flue gas is desulfurized in the spray desulfurization tower and discharged to the outside through the tubular waste heat exchanger.
2. The post-quench tower flue gas waste heat recovery system of claim 1, wherein a heat storage water tank is arranged between the tubular waste heat exchanger and the hot water chamber, and the tubular waste heat exchanger is made of hastelloy with acid corrosion resistance.
3. The post quench tower flue gas waste heat recovery system of claim 2, wherein the superheating chamber is disposed between the quench tower and the activated carbon adsorber.
4. A post quench tower flue gas waste heat recovery system as recited in claim 3, wherein the hot water chamber has a cavity wall in the shape of a horizontal cylinder, a steam nozzle is provided at the bottom of the hot water chamber, and an evacuation port is provided at the top of the hot water chamber.
5. The system for recovering waste heat of flue gas after quenching tower according to claim 4, wherein the wall of the evaporation chamber is a horizontal cylinder, baffles with the same spacing are alternately arranged at the bottom of the evaporation chamber, a steam outlet connected with the superheating chamber is arranged at the top of the evaporation chamber, and the material of the contact part of the evaporation chamber and the flue gas is hastelloy.
6. The system according to claim 5, wherein the top of the heat exchanging flue is composed of the bottom of the hot water chamber and the bottom of the evaporating chamber, and both sides and the bottom of the heat exchanging flue are formed by stacking silica bricks resistant to sulfuric acid corrosion.
7. The system of claim 6, wherein the hot water chamber comprises a first hot water chamber body and a second hot water chamber body arranged at the top of the first hot water chamber body, the first hot water chamber body is composed of a heat exchange flue side wall and a bearing wall arranged in the heat exchange flue side wall, an insulating layer is arranged on the outer surface of the first hot water chamber body, a steam pipe orifice is arranged on the first hot water chamber body and is communicated with the outside and the inner cavity of the second hot water chamber body, and an emptying port is arranged on the second hot water chamber body.
8. The system of claim 7, wherein the evaporation chamber comprises a first evaporation chamber body and a second evaporation chamber body arranged at the top of the first evaporation chamber body, the first evaporation chamber body is composed of a heat exchange flue side wall and a bearing wall arranged in the heat exchange flue side wall, an insulating layer is arranged on the outer surface of the first evaporation chamber body, a baffle plate is arranged in the second evaporation chamber body, and a low-pressure steam outlet is formed in the second evaporation chamber body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320808142.5U CN219433232U (en) | 2023-04-13 | 2023-04-13 | Flue gas waste heat recovery system used after quench tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320808142.5U CN219433232U (en) | 2023-04-13 | 2023-04-13 | Flue gas waste heat recovery system used after quench tower |
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| Publication Number | Publication Date |
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| CN219433232U true CN219433232U (en) | 2023-07-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202320808142.5U Active CN219433232U (en) | 2023-04-13 | 2023-04-13 | Flue gas waste heat recovery system used after quench tower |
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| CN (1) | CN219433232U (en) |
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2023
- 2023-04-13 CN CN202320808142.5U patent/CN219433232U/en active Active
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