CN216431781U - Flue gas heat exchange device for producing steam by using power plant desulfurization flue gas waste heat - Google Patents
Flue gas heat exchange device for producing steam by using power plant desulfurization flue gas waste heat Download PDFInfo
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- CN216431781U CN216431781U CN202122621443.0U CN202122621443U CN216431781U CN 216431781 U CN216431781 U CN 216431781U CN 202122621443 U CN202122621443 U CN 202122621443U CN 216431781 U CN216431781 U CN 216431781U
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- flue gas
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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 discloses an utilize flue gas heat transfer device of power plant's desulfurization flue gas waste heat product steam, including gas heater, evaporimeter and flash tank, gas heater both ends set up gas heater import flue and gas heater export flue, the gas heater internal fixation is provided with heat exchanger tube bundle, the circulation demineralized water has in the heat exchanger tube bundle, heat exchanger tube bundle's entry end is through intaking distributor pipe and circulating pump intercommunication, heat exchanger tube bundle's delivery port is through the water inlet intercommunication of a water distributor pipe and flash tank, the delivery port of flash tank and heat exchanger tube bundle's water inlet intercommunication, the outlet of evaporimeter and the water inlet intercommunication of flash tank, the steam outlet of flash tank and the steam inlet intercommunication of evaporimeter. The utility model has the advantages of use flue gas heat exchanger, flash tank and evaporimeter jointly, multiclass waste water can be handled to the evaporimeter, has realized the purpose of treating waste with waste to the energy has been practiced thrift, makes evaporimeter running cost reduce.
Description
Technical Field
The utility model relates to a flue gas heat transfer technical field, in particular to utilize flue gas heat transfer device of power plant's desulfurization flue gas waste heat production steam.
Background
Coal-fired power plants are the major energy supply enterprises in the industry, and the utilization of energy is the most important factor. The published data of a plurality of coal-fired power plants show that the flue gas passes through a series of superheaters, economizers, air preheaters and the like after going out of a boiler, the flue gas temperature in front of a desulfurization device can reach 150 ℃ at most, part of the power plants realize the white elimination of the flue gas by using the low-temperature economizer, but the effect is poor, the waste of energy is caused, the flow rate of the part of the flue gas is large, the temperature of the flue gas is high, and the requirement of the desulfurization device on the temperature of the flue gas is not high, so that the heat can be recycled.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an utilize flue gas heat transfer device of power plant's desulfurization flue gas waste heat production steam.
The above technical purpose of the present invention can be achieved by the following technical solutions:
the utility model provides an utilize flue gas heat transfer device of power plant's desulfurization flue gas waste heat steam production, a serial communication port, including gas heater, evaporimeter and flash tank, gas heater both ends set up gas heater import flue and gas heater export flue, the gas heater internal fixation is provided with heat transfer tube bundle, the circulation has the circulation demineralized water in the heat transfer tube bundle, the entry end of heat transfer tube bundle is through intaking distribution pipe and circulating pump intercommunication, the delivery port of heat transfer tube bundle is through the water inlet intercommunication of water distribution pipe and flash tank, the delivery port of flash tank and the water inlet intercommunication of heat transfer tube bundle, the outlet of evaporimeter and the water inlet intercommunication of flash tank, the steam outlet of flash tank and the steam inlet intercommunication of evaporimeter.
Preferably, the heat exchange tube bundle is integrally a finned tube and is of a multi-tube-pass baffling structure along the inside of the flue gas heat exchanger.
Preferably, the distribution pipe of intaking includes female pipe and the branch pipe of intaking, the female pipe one end of intaking seals through flange and blind plate for the connection, and the other end passes through opening flange and circulating pump intercommunication, the female outer wall of intaking has seted up the several trompil and is connected with branch pipe one end of intaking, the branch pipe other end of intaking communicates with heat exchanger tube bank.
Preferably, go out the water distribution pipe including the female pipe of play water and play water branch pipe, go out female pipe one end of water and seal through flange and blind plate for the connection, the other end passes through the water inlet intercommunication of opening flange and flash tank, go out female pipe outer wall and seted up the several trompil and be connected with play water branch pipe one end, go out the water branch pipe other end and heat exchanger tube bank intercommunication.
Preferably, the upper end and the lower end of the middle part of the outer wall of the flue gas heat exchanger are both provided with manhole doors, and the manhole doors are of a quick-opening structure.
Preferably, the bottom of the outer wall of the flue gas heat exchanger is also provided with a soot blower, and the output end of the soot blower is communicated with the inside of the flue gas heat exchanger.
Preferably, the non-condensable gas exhaust port at the upper end of the flash tank is also connected with a vacuum pump.
Preferably, the upper end of the evaporator is also provided with a steam supplementing pipeline, and the steam supplementing pipeline is provided with a supplementing steam valve.
To sum up, the utility model discloses following beneficial effect has:
1. the utility model discloses jointly use gas heater and evaporimeter, multiclass waste water can be handled to the evaporimeter, has realized the purpose of treating waste with useless to the energy has been practiced thrift, makes evaporimeter running cost reduce.
2. The utility model discloses a circulation demineralized water after the heat transfer of gas heater is supersaturated hot water, gets into negative pressure flash tank flash distillation, the vapor retrieval and utilization of output, the hot water continuation system inner loop of surplus portion.
3. The utility model discloses in the raw steam that well flash tank produced continues back to the flash tank after the heat transfer condensation in the evaporimeter, entire system is airtight circulation, and no water loss, consequently, does not need extra make-up water.
4. The utility model has the advantages that the negative pressure evaporation is carried out in the flash tank, the pressure and the temperature are lower, the operation is safe, stable and reliable, and when the pressure or the temperature fluctuates or does not reach a set value, the alarm is given and the additional live steam is supplemented in an interlocking way;
5. the utility model discloses arrange many tube side baffling heat exchanger tube bundles in well gas heater, and wholly be the finned tube, heat exchange efficiency is high to prevent effectively that the flue gas deposition from.
6. The utility model discloses well gas heater sets up manhole door and soot blower, makes things convenient for overhaul of the equipments and operation maintenance.
Drawings
Fig. 1 is a schematic structural diagram of the present invention;
FIG. 2 is a schematic structural view of the middle water inlet distribution pipe of the present invention;
fig. 3 is a schematic structural view of the middle water outlet distribution pipe of the present invention.
Detailed Description
The following description will be further described with reference to the accompanying drawings, which are not intended to limit the present invention.
As shown in figures 1 to 3, a flue gas heat exchange device for producing steam by using waste heat of desulfurized flue gas of a power plant comprises a flue gas heat exchanger 1, an evaporator 2 and a flash tank 3, wherein an inlet flue of the flue gas heat exchanger 1 and an outlet flue of the flue gas heat exchanger 1 are arranged at two ends of the flue gas heat exchanger 1, the flue gas heat exchanger 1 is arranged between an external power plant dust remover and a desulfurization tower, the temperature of internal flue gas is 85-140 ℃, the average flow velocity of the flue gas is 8-13 m/s, a heat exchange tube bundle 4 is fixedly arranged in the flue gas heat exchanger 1, circulating demineralized water flows through the heat exchange tube bundle 4, the flue gas heat exchanger 1 mainly exchanges heat between the hot flue gas before desulfurization and the circulating demineralized water, the hot flue gas after heat exchange continues to the desulfurization tower, the circulating demineralized water is heated to be in an overheating state and then flows to the flash tank 3, the hot flue gas flows in the shell of the flue gas heat exchange tube bundle, the circulating demineralized water flows through the heat exchange tube bundle, the shell of the flue gas heat exchanger 1 is made of Q235B, low alloy steel and the like.
The entry end of heat exchange tube bank 4 is through intaking distribution pipe 5 and circulating pump 6 intercommunication, circulating pump 6 can continue to carry the liquid of the incomplete flash distillation in the flash tank 3 to in the flue gas heat exchanger 1 through the pipeline, the delivery port of heat exchange tube bank 4 passes through water distribution pipe 7 and flash tank 3's water inlet intercommunication, flash tank 3's delivery port and heat exchange tube bank 4's water inlet intercommunication, the overheated circulation demineralized water after flue gas heat exchanger 1 heat transfer passes through the pipeline and carries to in the flash tank 3, be the negative pressure in the flash tank 3, the highly compressed liquid of overheated attitude gets into in the flash tank 3 of comparison low pressure, because the sudden reduction of pressure, these saturated liquid become partly saturated steam and partial saturated liquid and stop in flash tank 3 bottom.
The water outlet of the evaporator 2 is communicated with the water inlet of the flash tank 3, the steam outlet of the flash tank 3 is communicated with the steam inlet of the evaporator 2, the evaporator 2 comprises a single-effect evaporation, double-effect evaporation and triple-effect evaporator, the evaporator 2 receives raw steam from the flash tank 3, and condensed water is formed after heat exchange and condensation in the evaporator 2 and continues to return to the flash tank 3.
The whole heat exchange tube bundle 4 is a finned tube, the finned tube has good corrosion resistance, wear resistance, low contact thermal resistance, high stability, dust deposition prevention and other performances, the material can be selected from Q235B, 304, 316L, ND steel and the like, the wall thickness of the heat exchange tube is more than or equal to 3.5mm, the thickness of the fin is more than or equal to 1.5mm, the corrosion allowance of the wall thickness of the heat exchange tube is more than or equal to 2mm, and the heat exchange tube bundle 4 is of a multi-tube-pass baffling structure along the inside of the flue gas heat exchanger 1.
The distribution pipe 5 of intaking includes female pipe 8 and the branch pipe 9 of intaking, female 8 one end of intaking seals through flange blind plate 10 for the connection, the other end passes through opening flange and circulating pump 6 intercommunication, female 8 outer walls of intaking have seted up the several trompil and have been connected with branch pipe 9 one end of intaking, the branch pipe 9 other end of intaking and heat transfer tube bank 4 intercommunication, go out water distribution pipe 7 including female pipe 11 and play water branch pipe 12 of going out, female pipe 11 one end of going out seals through flange blind plate 10 for the connection, the other end passes through opening flange and flash tank 3's water inlet intercommunication, female pipe 11 outer wall of going out has seted up the several trompil and is connected with play water branch pipe 12 one end, go out water branch pipe 12 other end and heat transfer tube bank 4 intercommunications, circulation demineralized water can realize circulation heat transfer in inside.
Both ends all are provided with manhole door 13 about 1 outer wall middle part of gas heater, and manhole door 13 is the open-type structure soon, for convenient maintenance equipment and regular observation equipment internal state, sets up manhole door 13 and makes things convenient for people to pass in and out equipment, and manhole door 13 form includes square manhole door, circular manhole door etc..
The bottom of the outer wall of the flue gas heat exchanger 1 is also provided with a soot blower 14, the output end of the soot blower 14 is communicated with the interior of the flue gas heat exchanger 1, in order to ensure the heat exchange efficiency, the soot blower 14 is required to be used for timely cleaning the soot on various heating surfaces periodically, the soot blower 14 can be selected from an air soot blower, a steam soot blower, a hydraulic soot blower and the like, the air soot blower blows the soot on the heating surfaces by utilizing the high-pressure airflow impact force of compressed air, the steam soot blower cleans the soot on the heating surfaces by utilizing the high-speed jet impact force of superheated steam, and the hydraulic soot blower takes high-pressure water as a medium to promote the removal of the soot adhered on the heating surfaces due to quenching and brittle fracture.
The non-condensable gas exhaust port at the upper end of the flash tank 3 is also connected with a vacuum pump 15, if the hot flue gas is low-temperature flue gas, the flash evaporation is carried out in a negative pressure state when hot water with the temperature less than or equal to 100 ℃ is evaporated, and the vacuum pump 15 is arranged for exhausting in order to maintain the negative pressure in the flash tank 3 and regularly exhaust the non-condensable gas in the system.
The upper end of the evaporator 2 is also provided with a steam supplementing pipeline 16, the steam supplementing pipeline is provided with a supplementing steam valve 17, and the supplementing steam valve 17 is opened to supplement extra generated steam by monitoring the internal operation state of the flash tank 3 when the pressure or the temperature fluctuates or does not reach a set value.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention, and those skilled in the art can make various modifications or equivalent substitutions within the spirit and scope of the present invention, and such modifications or equivalent substitutions should also be considered as falling within the scope of the present invention.
Claims (8)
1. The utility model provides an utilize flue gas heat transfer device of power plant's desulfurization flue gas waste heat steam production, a serial communication port, including gas heater, evaporimeter and flash tank, gas heater both ends set up gas heater import flue and gas heater export flue, the gas heater internal fixation is provided with heat transfer tube bundle, the circulation has the circulation demineralized water in the heat transfer tube bundle, the entry end of heat transfer tube bundle is through intaking distribution pipe and circulating pump intercommunication, the delivery port of heat transfer tube bundle is through the water inlet intercommunication of water distribution pipe and flash tank, the delivery port of flash tank and the water inlet intercommunication of heat transfer tube bundle, the outlet of evaporimeter and the water inlet intercommunication of flash tank, the steam outlet of flash tank and the steam inlet intercommunication of evaporimeter.
2. The flue gas heat exchange device for producing steam by using the waste heat of the desulfurization flue gas of the power plant as claimed in claim 1, characterized in that: the heat exchange tube bundle is integrally a finned tube and is of a multi-tube-pass baffling structure along the inside of the flue gas heat exchanger.
3. The flue gas heat exchange device for producing steam by using the waste heat of the desulfurization flue gas of the power plant as claimed in claim 1, characterized in that: the distribution pipe of intaking includes female pipe and the branch pipe of intaking, the female pipe one end of intaking seals through flange and blind plate for the connection, and the other end passes through opening flange and circulating pump intercommunication, the female outer wall of intaking has seted up the several trompil and is connected with branch pipe one end of intaking, the branch pipe other end of intaking communicates with heat exchanger tube bank.
4. The flue gas heat exchange device for producing steam by using the waste heat of the desulfurization flue gas of the power plant as claimed in claim 1, characterized in that: go out the water distribution pipe and include female pipe of play water and play water branch pipe, female pipe of play water one end is sealed through flange and blind plate for the connection, and the other end passes through the water inlet intercommunication of opening flange with the flash tank, female pipe outer wall of play water has seted up the several trompil and is connected with play water branch pipe one end, the play water branch pipe other end and heat exchanger tube bank intercommunication.
5. The flue gas heat exchange device for producing steam by using the waste heat of the desulfurization flue gas of the power plant as claimed in claim 1, characterized in that: and the upper end and the lower end of the middle part of the outer wall of the flue gas heat exchanger are both provided with manhole doors, and the manhole doors are of a quick-opening structure.
6. The flue gas heat exchange device for producing steam by using the waste heat of the desulfurization flue gas of the power plant as claimed in claim 1, characterized in that: and the bottom of the outer wall of the flue gas heat exchanger is also provided with a soot blower, and the output end of the soot blower is communicated with the inside of the flue gas heat exchanger.
7. The flue gas heat exchange device for producing steam by using the waste heat of the desulfurization flue gas of the power plant as claimed in claim 1, characterized in that: and the non-condensable gas exhaust port at the upper end of the flash tank is also connected with a vacuum pump.
8. The flue gas heat exchange device for producing steam by using the waste heat of the desulfurization flue gas of the power plant as claimed in claim 1, characterized in that: the upper end of the evaporator is also provided with a steam supplementing pipeline, and a steam supplementing valve is arranged on the steam supplementing pipeline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122621443.0U CN216431781U (en) | 2021-10-29 | 2021-10-29 | Flue gas heat exchange device for producing steam by using power plant desulfurization flue gas waste heat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122621443.0U CN216431781U (en) | 2021-10-29 | 2021-10-29 | Flue gas heat exchange device for producing steam by using power plant desulfurization flue gas waste heat |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216431781U true CN216431781U (en) | 2022-05-03 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122621443.0U Active CN216431781U (en) | 2021-10-29 | 2021-10-29 | Flue gas heat exchange device for producing steam by using power plant desulfurization flue gas waste heat |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216431781U (en) |
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2021
- 2021-10-29 CN CN202122621443.0U patent/CN216431781U/en active Active
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