CN211232845U - Waste heat recovery system - Google Patents
Waste heat recovery system Download PDFInfo
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- CN211232845U CN211232845U CN201922160487.0U CN201922160487U CN211232845U CN 211232845 U CN211232845 U CN 211232845U CN 201922160487 U CN201922160487 U CN 201922160487U CN 211232845 U CN211232845 U CN 211232845U
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- recovery system
- heat recovery
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- mixing arrangement
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Abstract
The utility model relates to a waste heat recovery system, the system is including deciding flash tank, flash distillation unit, desalination device, steam mixing arrangement, deaerator and moisturizing device of arranging, decide and arrange flash tank, flash distillation unit, desalination device and communicate in order, desalination device is linked together through first intercommunication pipeline and steam mixing arrangement upper portion, and the steam mixing arrangement lower part is linked together through second intercommunication pipeline and deaerator, the moisturizing device is linked together through third intercommunication pipeline and steam mixing arrangement upper portion. The utility model discloses simple structure, reasonable in design, high-usage through carrying out the flash distillation separation to boiler exhaust's hot water, separates the processing with the flashing of hot water and other waste water, combines mixing arrangement, deaerating plant and moisturizing device simultaneously, can realize that exhaust steam heat energy effectively retrieves, has improved the energy-concerving and environment-protective performance of equipment.
Description
Technical Field
The utility model belongs to the technical field of heat recovery, specific saying so relates to a waste heat recovery system.
Background
The periodic sewage discharge capacity expander is mainly used for reducing the pressure and expanding the capacity of periodic sewage of a boiler, and the periodic sewage discharge water is subjected to secondary boiling under lower pressure to obtain part of secondary steam and simultaneously reduce the temperature of the sewage discharge water; the secondary steam and the sewage are separated in the periodic sewage discharging flash tank, the separated steam is discharged from an outlet at the upper part, and the sewage is discharged into the trench from a sewage port at the lower part. At present, most of secondary steam of the power plant constant-discharge flash vessel is directly discharged into the atmosphere, and in winter, an emptying pipe of the constant-discharge flash vessel is directly discharged into the atmosphere, so that a large amount of qualified flash steam is wasted, and the energy conservation and the environmental protection are not facilitated; in winter, the outdoor temperature is low, and flash steam is condensed and deformed outside the emptying pipe of the fixed-discharge flash tank, so that the safety of peripheral equipment is influenced; after the fixed-discharge capacity expansion, the discharged drain water is directly discharged to a fixed-discharge water tank, the drain water temperature is higher, the capacity expansion and flash evaporation are carried out again in the fixed-discharge flash tank, and flash steam is exposed from the place where the cement cover of the fixed-discharge flash tank water tank is not tightly sealed, so that the surrounding environment is influenced; leading to poor environmental quality of the boiler room; because the steam discharged to the atmosphere from the fixed discharge flash tank has higher heat value, the great waste of energy is caused.
In industrial production, each set of boiler system is provided with periodic sewage discharge and continuous sewage discharge system equipment in order to maintain the standard salt content in water quality, when the water quality is unqualified, high-temperature water under the same pressure in the boiler system is discharged out of the boiler system through periodic sewage discharge and continuous sewage discharge, and when the system discharges sewage, a large amount of heat energy waste and relatively high-quality hot water waste are faced; the other low-level high-pressure deaerator for the boiler auxiliary equipment is the same as the periodic pollution discharge and the continuous pollution discharge, and in order to remove dissolved oxygen in water, the deaerator is required to continuously remove a large amount of mixture of pressurized steam and oxygen, so that the waste of a large amount of high-pressure steam heat energy and high-quality hot water and the thermal pollution of the environment are caused. The waste steam is called dead steam which is low-temperature steam without pollution, and the waste steam has no good energy-collecting equipment in the existing industrial production, is discharged in a conventional form for many years, and the waste of a large amount of heat energy is inevitable.
For the waste situation of dead steam of a fixed-row flash tank, a plurality of solutions are provided at home and abroad, and Chinese patent CN206094989U discloses a continuous fixed-row dead steam energy-collecting device, which comprises a shell and a heat exchanger, wherein the heat exchanger is arranged in the shell, one side of the shell is provided with an air inlet, and the other side of the shell is provided with a water outlet and a water inlet from top to bottom; the water outlet is connected with one end of the heat exchanger, and the water inlet is connected with the other end of the heat exchanger; the top of the shell is provided with an air outlet, and the bottom of the shell is provided with a condensed water outlet. The exhaust steam energy-collecting device of the device is formed by connecting a plurality of coiled pipes in series, belongs to dividing wall type heat exchange, has a lower heat transfer coefficient than direct heat exchange, and has higher equipment cost if a large enough heat exchanger area needs to be designed to ensure the recovery share of the exhaust steam; and water flows in the serpentine pipe, so that the resistance of the water side is increased, the power consumption of the water pump needs to be additionally increased, and the energy conservation is not facilitated.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects existing in the prior art, the utility model provides a waste heat recovery system which can realize the effective recovery of the heat energy of the dead steam.
The utility model provides a waste heat recovery system, the system is including deciding flash tank, flash distillation plant, demineralizer, steam mixing arrangement, deaerating plant and moisturizing device of arranging, decide and arrange flash tank, flash distillation plant, demineralizer and communicate in order, the demineralizer is linked together through first intercommunication pipeline and steam mixing arrangement upper portion, and the steam mixing arrangement lower part is linked together through second intercommunication pipeline and deaerating plant, the moisturizing device is linked together through third intercommunication pipeline and steam mixing arrangement upper portion.
The utility model discloses thereby utilize normal atmospheric temperature demineralized water among the moisturizing device and low temperature steam intensive mixing in the steam mixing arrangement to improve the demineralized water temperature who gets into deaerator.
Preferably, the second communicating pipeline is provided with a heating mechanism, and a temperature measuring mechanism is arranged between the heating mechanism and the water-vapor mixing device. The temperature of the demineralized water (demineralized water after heat exchange) that the temperature measurement mechanism set up and can come out by the water vapor mixing device of real-time supervision, if the temperature has not reached the temperature that gets into the oxygen-eliminating device yet, then start heating mechanism, the demineralized water gets into the oxygen-eliminating device after heating to required temperature through heating mechanism, has effectively guaranteed the temperature of the demineralized water that gets into the oxygen-eliminating device, has guaranteed the steady operation of oxygen-eliminating device.
Preferably, the desalination device is also in communication with a brine tank. The high salinity water treated by the desalination device can be stored in a brine storage tank for facilitating subsequent treatment.
Preferably, the deaerating device comprises a deaerator, a heat exchanger and a heater, the deaerator is communicated with the heat exchanger, the heat exchanger is communicated with the heater, a temperature measuring device is arranged on a communication pipeline between the heat exchanger and the heater, and the heater is communicated with the deaerator; the heat exchanger is communicated with a water supplementing device.
Preferably, the temperature measuring device and the heater are respectively communicated with the controller.
Because the oxygen-eliminating device also can have steam escape and cause the extravagant defect of energy, the utility model discloses also carried out exhaust steam heat recovery to the oxygen-eliminating device part, the exhaust steam of oxygen-eliminating device gets into and discharges behind the demineralized water heat transfer of heat exchanger with the moisturizing device, and the temperature of the demineralized water after the temperature measuring device real-time detection heat transfer sends temperature signal to the controller, and the controller sends heating signal to the heater, and the demineralized water passes through the heater and heats and get into the oxygen-eliminating device after to required temperature. Further improving the waste steam heat energy recovery efficiency of the system and simultaneously ensuring the safe operation of the deaerator.
Preferably, the heat exchanger comprises a shell, and more than one packing layer is arranged in the shell. And the filler is adopted for heat exchange, so that the complexity of the equipment is reduced, and the waste heat in the exhaust steam is recovered under the condition of consuming less energy.
Preferably, the water-vapor mixing device comprises a cavity arranged at the upper part, a venturi mixer arranged at the middle part and a collecting box arranged at the lower part, and the bottom end of the first communicating pipeline and the bottom end of the third communicating pipeline are respectively arranged in the cavity at the upper part; the second communicating pipeline is communicated with the lower collecting box. The sufficient mixing of soda is realized through the venturi mixer, gives the heat transfer of steam and cools off demineralized water, and the demineralized water after the heating gets into the collection box, realizes exhaust steam heat recovery.
Preferably, a first nozzle is arranged at the bottom end of the first communicating pipeline in the cavity, and a second nozzle is arranged at the bottom end of the third communicating pipeline in the cavity.
Preferably, a first regulating valve is arranged on the first communicating pipeline, a second regulating valve is arranged on the second communicating pipeline, and a third regulating valve is arranged on the third communicating pipeline. The flow and the flow speed can be controlled through the regulating valve, and the stability of the system operation can be improved.
The beneficial effects of the utility model reside in that:
the utility model discloses simple structure, reasonable in design, high-usage through carrying out the flash distillation separation to boiler exhaust's hot water, separates the processing with the flashing of hot water and other waste water, combines mixing arrangement, deaerating plant and moisturizing device simultaneously, can realize that exhaust steam heat energy effectively retrieves, has improved the energy-concerving and environment-protective performance of equipment.
Drawings
Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention;
FIG. 2 is a schematic structural view of the water-vapor mixing device of the present invention;
FIG. 3 is a schematic structural view of the oxygen removing device of the present invention;
FIG. 4 is a schematic structural diagram of the heat exchanger of the present invention;
fig. 5 is a schematic structural view of embodiment 2 of the present invention.
Detailed Description
The invention will be further described with reference to the accompanying drawings and specific embodiments, but the scope of the invention is not limited thereto.
Example 1
Referring to fig. 1 ~ 4, a waste heat recovery system, the system is including deciding row flash tank 1, flash distillation plant 2, demineralizer 3, steam mixing arrangement 4, deaerator 5 and moisturizing device 6, decide row flash tank 1, flash distillation plant 2, demineralizer 3 and communicate in order, demineralizer 3 is linked together through first communicating pipe 7 and 4 upper portions of steam mixing arrangement, and 4 lower parts of steam mixing arrangement are linked together through second communicating pipe 8 and deaerator 5, moisturizing device 6 is linked together through third communicating pipe 9 and 4 upper portions of steam mixing arrangement.
The utility model discloses thereby utilize normal atmospheric temperature demineralized water among the moisturizing device and low temperature steam intensive mixing in the steam mixing arrangement to improve the demineralized water temperature who gets into deaerator.
The deaerating device comprises a deaerator 10, a heat exchanger 11 and a heater 12, wherein the deaerator 10 is communicated with the heat exchanger 11, the heat exchanger 11 is communicated with the heater 12, a temperature measuring device 13 is arranged on a communication pipeline between the heat exchanger 11 and the heater 12, and the heater 12 is communicated with the deaerator 10; the heat exchanger 11 is communicated with the water replenishing device 6; the temperature measuring device 13 and the heater 12 are respectively communicated with the controller. Because the oxygen-eliminating device also can have steam escape and cause the extravagant defect of energy, the utility model discloses also carried out exhaust steam heat recovery to the oxygen-eliminating device part, the exhaust steam of oxygen-eliminating device gets into and discharges behind the demineralized water heat transfer of heat exchanger with the moisturizing device, and the temperature of the demineralized water after the temperature measuring device real-time detection heat transfer sends temperature signal to the controller, and the controller sends heating signal to the heater, and the demineralized water passes through the heater and heats and get into the oxygen-eliminating device after to required temperature. Further improving the waste steam heat energy recovery efficiency of the system and simultaneously ensuring the safe operation of the deaerator.
The heat exchanger comprises a shell 14 and a layer of packing 15 arranged inside the shell. The packing layer can be composed of a plurality of layers of different packing materials, the packing material is adopted for heat exchange, the complexity of the equipment is reduced, and the waste heat in the exhaust steam is recovered under the condition of consuming less energy.
The water-vapor mixing device comprises a cavity 16 arranged at the upper part, a Venturi mixer 17 arranged at the middle part and a collecting box 18 arranged at the lower part, wherein the bottom end of the first communicating pipeline 7 and the bottom end of the third communicating pipeline 9 are respectively arranged in the cavity 16 at the upper part; the second communicating duct 8 communicates with a lower collection tank 18. The bottom end of the first communicating pipeline 7 in the cavity 16 is provided with a first nozzle 19, and the bottom end of the third communicating pipeline 9 in the cavity 16 is provided with a second nozzle 20. The sufficient mixing of soda is realized through the venturi mixer, gives the heat transfer of steam and cools off demineralized water, and the demineralized water after the heating gets into the collection box, realizes exhaust steam heat recovery.
The first communicating pipeline 7 is provided with a first regulating valve 21, the second communicating pipeline 8 is provided with a second regulating valve 22, and the third communicating pipeline 9 is provided with a third regulating valve 23. The flow and the flow speed can be controlled through the regulating valve, and the stability of the system operation can be improved.
Example 2
Referring to fig. 2 ~ 5, a waste heat recovery system, the system is including deciding row flash vessel 1, flash distillation plant 2, demineralizer 3, steam mixing arrangement 4, deaerator 5 and moisturizing device 6, decide row flash vessel 1, flash distillation plant 2, demineralizer 3 and communicate in order, demineralizer 3 is linked together through first communicating pipe 7 and 4 upper portions of steam mixing arrangement, and 4 lower parts of steam mixing arrangement are linked together through second communicating pipe 8 and deaerator 5, moisturizing device 6 is linked together through third communicating pipe 9 and 4 upper portions of steam mixing arrangement.
The utility model discloses thereby utilize normal atmospheric temperature demineralized water among the moisturizing device and low temperature steam intensive mixing in the steam mixing arrangement to improve the demineralized water temperature who gets into deaerator.
The deaerating device comprises a deaerator 10, a heat exchanger 11 and a heater 12, wherein the deaerator 10 is communicated with the heat exchanger 11, the heat exchanger 11 is communicated with the heater 12, a temperature measuring device 13 is arranged on a communication pipeline between the heat exchanger 11 and the heater 12, and the heater 12 is communicated with the deaerator 10; the heat exchanger 11 is communicated with the water replenishing device 6; the temperature measuring device 13 and the heater 12 are respectively communicated with the controller. Because the oxygen-eliminating device also can have steam escape and cause the extravagant defect of energy, the utility model discloses also carried out exhaust steam heat recovery to the oxygen-eliminating device part, the exhaust steam of oxygen-eliminating device gets into and discharges behind the demineralized water heat transfer of heat exchanger with the moisturizing device, and the temperature of the demineralized water after the temperature measuring device real-time detection heat transfer sends temperature signal to the controller, and the controller sends heating signal to the heater, and the demineralized water passes through the heater and heats and get into the oxygen-eliminating device after to required temperature. Further improving the waste steam heat energy recovery efficiency of the system and simultaneously ensuring the safe operation of the deaerator.
The heat exchanger comprises a shell 14 and a layer of packing 15 arranged inside the shell. And the filler is adopted for heat exchange, so that the complexity of the equipment is reduced, and the waste heat in the exhaust steam is recovered under the condition of consuming less energy.
The water-vapor mixing device comprises a cavity 16 arranged at the upper part, a Venturi mixer 17 arranged at the middle part and a collecting box 18 arranged at the lower part, wherein the bottom end of the first communicating pipeline 7 and the bottom end of the third communicating pipeline 9 are respectively arranged in the cavity 16 at the upper part; the second communicating duct 8 communicates with a lower collection tank 18. A first nozzle 19 is arranged at the bottom end of a first communicating pipeline in the cavity 16, and a second nozzle 20 is arranged at the bottom end of a third communicating pipeline in the cavity 16. The sufficient mixing of soda is realized through the venturi mixer, gives the heat transfer of steam and cools off demineralized water, and the demineralized water after the heating gets into the collection box, realizes exhaust steam heat recovery.
The first communicating pipeline 7 is provided with a first regulating valve 21, the second communicating pipeline 8 is provided with a second regulating valve 22, and the third communicating pipeline 9 is provided with a third regulating valve 23. The flow and the flow speed can be controlled through the regulating valve, and the stability of the system operation can be improved.
And a heating mechanism 24 is arranged on the second communicating pipeline 8, and a temperature measuring mechanism 25 is arranged between the heating mechanism 24 and the water-vapor mixing device. The temperature measuring mechanism 25 is arranged to monitor the temperature of the desalted water (desalted water after heat exchange) which is discharged from the water-vapor mixing device in real time, if the temperature does not reach the temperature of the deaerator, the heating mechanism 24 is started, the desalted water is heated to the required temperature through the heating mechanism and then enters the deaerator, the temperature of the desalted water entering the deaerator is effectively guaranteed, and the stable operation of the deaerator is further guaranteed.
The desalination device is also in communication with a brine storage tank 26 in which the high salinity water treated by the desalination device can be stored for subsequent treatment.
Claims (9)
1. A waste heat recovery system is characterized in that: the system is including deciding flash tank, flash distillation unit, demineralizer, steam mixing arrangement, deaerating plant and moisturizing device of arranging, decide and arrange flash tank, flash distillation unit, demineralizer and communicate in order, the demineralizer is linked together through first intercommunication pipeline and steam mixing arrangement upper portion, and the steam mixing arrangement lower part is linked together through second intercommunication pipeline and deaerating plant, the moisturizing device is linked together through third intercommunication pipeline and steam mixing arrangement upper portion.
2. The heat recovery system of claim 1, wherein: and a heating mechanism is arranged on the second communicating pipeline, and a temperature measuring mechanism is arranged between the heating mechanism and the water-vapor mixing device.
3. The heat recovery system according to claim 1 or 2, wherein: the desalination device is also communicated with a brine storage tank.
4. The heat recovery system of claim 1, wherein: the deaerating device comprises a deaerator, a heat exchanger and a heater, wherein the deaerator is communicated with the heat exchanger, the heat exchanger is communicated with the heater, a temperature measuring device is arranged on a communication pipeline between the heat exchanger and the heater, and the heater is communicated with the deaerator; the heat exchanger is communicated with a water supplementing device.
5. The heat recovery system of claim 4, wherein: the temperature measuring device and the heater are respectively communicated with the controller.
6. The heat recovery system of claim 4, wherein: the heat exchanger comprises a shell, wherein more than one layer of packing layers are arranged in the shell.
7. The heat recovery system of claim 1, wherein: the water-vapor mixing device comprises a cavity arranged at the upper part, a Venturi mixer arranged at the middle part and a collecting box arranged at the lower part, wherein the bottom end of the first communicating pipeline and the bottom end of the third communicating pipeline are respectively arranged in the cavity at the upper part; the second communicating pipeline is communicated with the lower collecting box.
8. The heat recovery system of claim 7, wherein: the bottom end of the first communicating pipeline in the cavity is provided with a first nozzle, and the bottom end of the third communicating pipeline in the cavity is provided with a second nozzle.
9. The heat recovery system of claim 1, wherein: the first communicating pipeline is provided with a first regulating valve, the second communicating pipeline is provided with a second regulating valve, and the third communicating pipeline is provided with a third regulating valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922160487.0U CN211232845U (en) | 2019-12-05 | 2019-12-05 | Waste heat recovery system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922160487.0U CN211232845U (en) | 2019-12-05 | 2019-12-05 | Waste heat recovery system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211232845U true CN211232845U (en) | 2020-08-11 |
Family
ID=71920982
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922160487.0U Expired - Fee Related CN211232845U (en) | 2019-12-05 | 2019-12-05 | Waste heat recovery system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211232845U (en) |
-
2019
- 2019-12-05 CN CN201922160487.0U patent/CN211232845U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200811 Termination date: 20211205 |