CN117928279A - Sewage waste heat recovery equipment - Google Patents
Sewage waste heat recovery equipment Download PDFInfo
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- CN117928279A CN117928279A CN202410180355.7A CN202410180355A CN117928279A CN 117928279 A CN117928279 A CN 117928279A CN 202410180355 A CN202410180355 A CN 202410180355A CN 117928279 A CN117928279 A CN 117928279A
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- cavity
- tank
- waste heat
- degassing
- decontamination
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- 239000002918 waste heat Substances 0.000 title claims abstract description 59
- 238000011084 recovery Methods 0.000 title claims abstract description 40
- 239000010865 sewage Substances 0.000 title claims abstract description 37
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 93
- 238000007872 degassing Methods 0.000 claims abstract description 59
- 238000005202 decontamination Methods 0.000 claims abstract description 39
- 230000003588 decontaminative effect Effects 0.000 claims abstract description 39
- 230000007246 mechanism Effects 0.000 claims abstract description 19
- 239000000498 cooling water Substances 0.000 claims abstract description 17
- 238000001363 water suppression through gradient tailored excitation Methods 0.000 claims abstract description 11
- 238000004891 communication Methods 0.000 claims abstract description 4
- 238000001704 evaporation Methods 0.000 claims description 31
- 230000008020 evaporation Effects 0.000 claims description 29
- 238000007789 sealing Methods 0.000 claims description 16
- 230000008859 change Effects 0.000 claims description 12
- 239000013049 sediment Substances 0.000 claims description 8
- 239000007788 liquid Substances 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 2
- 239000002699 waste material Substances 0.000 abstract description 8
- 238000004064 recycling Methods 0.000 abstract description 6
- 238000007701 flash-distillation Methods 0.000 abstract 4
- 230000007704 transition Effects 0.000 abstract 2
- 238000000034 method Methods 0.000 description 6
- 230000004048 modification Effects 0.000 description 6
- 238000012986 modification Methods 0.000 description 6
- 238000009833 condensation Methods 0.000 description 5
- 230000005494 condensation Effects 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 5
- 239000012535 impurity Substances 0.000 description 5
- 238000012544 monitoring process Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000005201 scrubbing Methods 0.000 description 5
- 239000007789 gas Substances 0.000 description 4
- 230000005484 gravity Effects 0.000 description 4
- 238000009849 vacuum degassing Methods 0.000 description 4
- 238000007599 discharging Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006065 biodegradation reaction Methods 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/04—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being spirally coiled
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/043—Details
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F1/00—Treatment of water, waste water, or sewage
- C02F1/02—Treatment of water, waste water, or sewage by heating
- C02F1/04—Treatment of water, waste water, or sewage by heating by distillation or evaporation
- C02F1/06—Flash evaporation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B3/00—Other methods of steam generation; Steam boilers not provided for in other groups of this subclass
- F22B3/04—Other methods of steam generation; Steam boilers not provided for in other groups of this subclass by drop in pressure of high-pressure hot water within pressure- reducing chambers, e.g. in accumulators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D21/0001—Recuperative heat exchangers
- F28D21/0012—Recuperative heat exchangers the heat being recuperated from waste water or from condensates
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2303/00—Specific treatment goals
- C02F2303/10—Energy recovery
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Hydrology & Water Resources (AREA)
- Environmental & Geological Engineering (AREA)
- Water Supply & Treatment (AREA)
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Water, Waste Water Or Sewage (AREA)
Abstract
The invention discloses sewage waste heat recovery equipment, which belongs to the field of waste heat recovery and comprises a decontamination degassing tank, wherein a vacuum phase-change tank is arranged on one side of the decontamination degassing tank, a water gate is arranged between the decontamination degassing tank and the vacuum phase-change tank for communication, and the water gate is of a non-return type; the inside position fixedly connected with bilayer tripe net that is close to the centre of vacuum phase transition jar, and bilayer tripe net is with the inside flash distillation chamber and the steam chamber of keeping apart into of vacuum phase transition jar, the flash distillation chamber is located the steam chamber below, and the inside flash distillation auxiliary mechanism that is equipped with of flash distillation chamber, the steam intracavity portion is equipped with heat transfer and comdenstion water recovery mechanism, heat transfer and comdenstion water recovery mechanism specifically include: the circulating cooling water coil pipe is fixed inside the steam cavity, and the input end and the output end of the circulating cooling water coil pipe penetrate through the vacuum phase-change tank and extend to the outside. The invention can effectively recycle the waste heat, improve the waste heat recycling efficiency and avoid energy waste.
Description
Technical Field
The invention relates to the field of waste heat recovery, in particular to sewage waste heat recovery equipment.
Background
The waste heat recovery of sewage refers to a technology for collecting and utilizing waste heat generated in the sewage treatment process. The waste heat of sewage can be used for extracting valuable substances, recycling reusable water resources, accelerating the biodegradation process, providing proper environmental conditions, increasing crop yield, purifying air and the like.
The heat pump technology is a technology which increases the temperature of heat energy in sewage through processes such as evaporation, compression, condensation and the like, and then is applied to a heating system or industrial production. Heat exchange technology is also a common method of recovering waste heat, and by providing a heat exchanger between the point of waste heat generation and the place where the heat energy is needed, the heat energy is transferred to other mediums for various purposes.
However, most sewage treatment plants at present do not effectively recycle the waste heat, and the waste heat recycling efficiency is low, so that energy waste is caused. Accordingly, a sewage waste heat recovery apparatus is provided by those skilled in the art to solve the problems set forth in the background art described above.
Disclosure of Invention
The invention aims to provide sewage waste heat recovery equipment which can effectively recycle waste heat, improve waste heat recovery efficiency and avoid energy waste so as to solve the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions:
The sewage waste heat recovery device comprises a decontamination degassing tank, wherein a vacuum phase-change tank is arranged on one side of the decontamination degassing tank, a water gate is arranged between the decontamination degassing tank and the vacuum phase-change tank for communication, and the water gate is of a non-return type;
The vacuum phase change tank is characterized in that a double-layer louver net is fixedly connected to the position, close to the middle, inside the vacuum phase change tank, and the double-layer louver net isolates the inside of the vacuum phase change tank into a flash evaporation cavity and a steam cavity, the flash evaporation cavity is located below the steam cavity, a flash evaporation auxiliary mechanism is arranged inside the flash evaporation cavity, and a heat exchange and condensate water recovery mechanism is arranged inside the steam cavity.
As a further scheme of the invention: the heat exchange and condensate water recovery mechanism specifically comprises: the steam cooling device comprises a circulating cooling water coil pipe fixed inside a steam cavity, wherein the input end and the output end of the circulating cooling water coil pipe penetrate through a vacuum phase-change tank and extend to the outside, a water collecting tank is fixedly connected inside the steam cavity below the circulating cooling water coil pipe, a condensing water pipe is fixedly connected to the output end of the water collecting tank, and a water purifying tank is arranged below an output port of the condensing water pipe.
As still further aspects of the invention: the steam chamber top fixedly connected with steam closing cap, and steam closing cap top intermediate position is equipped with first pressure sensor, one side of first pressure sensor is equipped with first temperature sensor, and the opposite side of first pressure sensor is equipped with the air and takes off the gas port.
As still further aspects of the invention: the flash evaporation auxiliary mechanism specifically comprises: and the heat pipe grate is fixed in the flash evaporation cavity, and a plurality of vertically parallel heat pipe bundles are arranged on the outer surface of the heat pipe grate.
As still further aspects of the invention: the flash evaporation cavity bottom fixedly connected with drainage closing cap, and the bottom fixedly connected with U type pipe of drainage closing cap, U type pipe output is connected with the water escape valve, and is provided with the water escape tank below the delivery outlet of water escape valve.
As still further aspects of the invention: and a third pressure sensor is fixedly connected to the outer wall of one side of the flash evaporation cavity, and a third temperature sensor is arranged above the third pressure sensor.
As still further aspects of the invention: the device is characterized in that a shutter net is fixedly connected to the position, close to the top end, of the inside of the decontamination degassing tank, a filter screen is fixedly connected to the position, close to the bottom end, of the inside of the decontamination degassing tank, the inside of the decontamination degassing tank is sequentially divided into a degassing cavity, a water purifying cavity and a cyclone decontamination cavity from top to bottom by the shutter net, a liquid level meter is arranged between the degassing cavity and the cyclone decontamination cavity, a water inlet pipe communicated with the cyclone decontamination cavity is fixedly connected to the bottom end of the outer side surface of the decontamination tank, and the radial direction of the water inlet pipe is tangential to the lateral level of the cyclone decontamination cavity.
As still further aspects of the invention: the top of the degassing cavity is fixedly connected with a degassing sealing cover, the middle position of the top of the degassing sealing cover is fixedly connected with a second pressure sensor, one side of the second pressure sensor is provided with a second temperature sensor, and the other side of the second pressure sensor is provided with an air degassing port.
As still further aspects of the invention: the bottom fixedly connected with sediment closing cap of whirl scrubbing chamber, and the bottom output of sediment closing cap is connected with the blowoff valve, the delivery outlet below of blowoff valve is equipped with the drainage groove.
As still further aspects of the invention: and a fourth temperature sensor and a fourth pressure sensor are arranged on the outer wall of one side of the water purifying cavity, and the fourth temperature sensor is positioned above the fourth pressure sensor.
Compared with the prior art, the invention has the beneficial effects that:
1. The application can effectively recycle the waste heat, improve the waste heat recycling efficiency and avoid energy waste.
2. The application can not only exchange heat and recycle waste heat, but also recycle condensed water through the arranged heat exchange and condensed water recycling mechanism.
3. The application can remove impurities and bubbles in the sewage before recovering the waste heat, thereby ensuring the smooth operation of waste heat recovery.
Drawings
FIG. 1 is a schematic diagram of a sewage waste heat recovery device;
fig. 2 is a schematic structural diagram of a modification of the present application.
In the figure: 1. a decontamination degassing tank; 2. a vacuum phase change tank; 3. covering with sediment; 4. degassing and capping; 5. a drain cover; 6. a steam cover; 7. a water inlet pipe; 8. a filter screen; 9. a louvered net; 10. a cyclone decontamination cavity; 11. a water purifying cavity; 12. a degassing cavity; 13. a water gate; 14. a double layer shutter net; 15. a flash chamber; 16. a steam chamber; 17. a heat pipe grate; 18. a heat pipe bundle; 19. a circulating cooling water coil; 20. a water collection tank; 21. a condenser water pipe; 22. a liquid level gauge; 23. a first temperature sensor; 24. a first pressure sensor; 25. an air removal port; 26. a vacuum degassing port; 27. a blow-down valve; 28. a sewage draining tank; 29. a U-shaped tube; 30. a water drain valve; 31. a water drain tank; 32. a water purifying tank; 33. a second temperature sensor; 34. a second pressure sensor; 35. a third temperature sensor; 36. a third pressure sensor; 37. a fourth temperature sensor; 38. a fourth pressure sensor; 39. a first flash tank; 40. a second flash tank; 41. and a third flash tank.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As mentioned in the background art of the present application, the inventors found that most of the existing sewage treatment plants do not effectively recycle the waste heat, and the waste heat recovery efficiency is low, which results in energy waste and certain drawbacks.
In order to solve the defects, the application discloses sewage waste heat recovery equipment which can effectively recycle waste heat, improve waste heat recovery efficiency and avoid energy waste.
How the above technical problems are solved by the scheme of the present application will be described in detail below with reference to the accompanying drawings.
Referring to fig. 1, in the embodiment of the application, a sewage waste heat recovery device includes a decontamination degassing tank 1, a vacuum phase-change tank 2 is arranged at one side of the decontamination degassing tank 1, a water gate 13 is arranged between the decontamination degassing tank 1 and the vacuum phase-change tank 2 for communication, and the water gate 13 is of a non-return type; the position inside the vacuum phase-change tank 2 near the middle is fixedly connected with a double-layer shutter net 14, the double-layer shutter net 14 isolates the inside of the vacuum phase-change tank 2 into a flash evaporation cavity 15 and a steam cavity 16, the flash evaporation cavity 15 is positioned below the steam cavity 16, a flash evaporation auxiliary mechanism is arranged inside the flash evaporation cavity 15, and a heat exchange and condensate water recovery mechanism is arranged inside the steam cavity 16. The application can effectively recycle the waste heat, improve the waste heat recycling efficiency and avoid energy waste.
In this embodiment: the heat exchange and condensed water recovery mechanism specifically comprises: the circulating cooling water coil 19 fixed inside the steam cavity 16, the input end and the output end of the circulating cooling water coil 19 penetrate through the vacuum phase change tank 2 and extend to the outside, the steam cavity 16 below the circulating cooling water coil 19 is fixedly connected with the water collecting tank 20, the output end of the water collecting tank 20 is fixedly connected with the condensate pipe 21, and the water purifying tank 32 is arranged below the output port of the condensate pipe 21. The heat exchange and condensate water recovery mechanism not only can exchange heat and recover waste heat, but also can recover condensate water.
In this embodiment: the top end of the steam cavity 16 is fixedly connected with a steam sealing cover 6, a first pressure sensor 24 is arranged in the middle of the top end of the steam sealing cover 6, a first temperature sensor 23 is arranged on one side of the first pressure sensor 24, and an air degassing port 25 is arranged on the other side of the first pressure sensor 24. The first pressure sensor 24 and the first temperature sensor 23 are capable of monitoring the pressure and temperature in the steam chamber 16 in real time.
In this embodiment: the flash evaporation auxiliary mechanism specifically comprises: a heat pipe grate 17 fixed inside the flash chamber 15, and a plurality of vertically juxtaposed heat pipe bundles 18 provided on the outer surface of the heat pipe grate 17. The flash evaporation auxiliary mechanism can further improve waste heat recovery efficiency and avoid energy waste.
In this embodiment: the bottom end fixedly connected with drainage closing cap 5 of flash chamber 15, and the bottom fixedly connected with U type pipe 29 of drainage closing cap 5, U type pipe 29 output is connected with water drain valve 30, and is provided with water drain tank 31 below the delivery outlet of water drain valve 30. The drain tank 31 is for receiving the cooled waste heat water discharged from the drain valve 30.
In this embodiment: a third pressure sensor 36 is fixedly connected to the outer wall of one side of the flash chamber 15, and a third temperature sensor 35 is arranged above the third pressure sensor 36. The third temperature sensor 35 and the third pressure sensor 36 are capable of monitoring the temperature and pressure in the flash chamber 15 in real time.
In this embodiment: the position fixedly connected with tripe net 9 that is close to the top in the decontamination degassing tank 1 is inside, and the position fixedly connected with filter screen 8 that is close to the bottom in the decontamination degassing tank 1 is inside to be separated into degassing chamber 12, water purification chamber 11, whirl scrubbing chamber 10 from last to following down by tripe net 9 and filter screen 8 in proper order, and be equipped with the level gauge 22 between degassing chamber 12 and the whirl scrubbing chamber 10, decontamination degassing tank 1 lateral surface bottom fixedly connected with and whirl scrubbing chamber 10 intercommunication's water inlet pipe 7, and water inlet pipe 7 radial and whirl scrubbing chamber 10 side direction level tangent. This setting can ensure that impurity and bubble in the sewage are got rid of before retrieving the waste heat to guarantee waste heat recovery's smooth operation.
In this embodiment: the top end of the degassing cavity 12 is fixedly connected with a degassing sealing cover 4, the middle position of the top end of the degassing sealing cover 4 is fixedly connected with a second pressure sensor 34, one side of the second pressure sensor 34 is provided with a second temperature sensor 33, and the other side of the second pressure sensor 34 is provided with an air degassing port 25. The second pressure sensor 34 and the second temperature sensor 33 are capable of monitoring the pressure and temperature within the degassing chamber 12 in real time.
In this embodiment: the bottom end of the cyclone decontamination cavity 10 is fixedly connected with a sediment closing cap 3, the bottom output end of the sediment closing cap 3 is connected with a drain valve 27, and a drain groove 28 is arranged below an output port of the drain valve 27. The dirt discharging valve 27 is opened to discharge the foreign matters in the cyclone dirt removing chamber 10.
In this embodiment: a fourth temperature sensor 37 and a fourth pressure sensor 38 are arranged on the outer wall of one side of the water purifying cavity 11, and the fourth temperature sensor 37 is positioned above the fourth pressure sensor 38. The fourth temperature sensor 37 and the fourth pressure sensor 38 can monitor the temperature and the pressure in the water purifying chamber 11 in real time.
The working principle of the application is as follows: the waste heat recovery equipment is overhead, and the height is more than ten meters above the water surfaces of the sewage tank 28, the water drain tank 31 and the water purifying tank 32, namely, under the influence of gravity, the high vacuum in the decontamination degassing tank 1 and the vacuum phase change tank 2 can not reversely suck water in the three tanks into the tank body. The sewage with waste heat is sent into the sewage removing and degassing tank 1 by the water inlet pipe 7 by the external water pump and other devices, and the waste heat sewage rotates in the cyclone sewage removing cavity 10 due to the water flowing on the side edge of the water inlet pipe 7, so that impurities such as iron slag, stones and the like sink into the sediment cover 3 and are discharged into the sewage discharging tank 28 by the periodically opened sewage discharging valve 27. The residual heat water is further filtered by the filter screen 8 and then rises into the water purifying cavity 11, air and other bubbles contained in the residual heat water float up to the water surface under the influence of gravity and rise into the degassing cavity 12 through the louver net 9, the air degassing port 25 on the degassing sealing cover 4 is used for being pumped out of the decontamination degassing tank 1 by an external air pump, and the louver net 9 is used for shielding splashed water drops. Residual heat water without impurities and air bubbles enters the vacuum phase-change tank 2 through the water gate 13, under the negative pressure formed by the vacuum degassing port 26 and gravity, the residual heat water reaches a supersaturated state in the flash evaporation cavity 15 and flashes to water vapor, the water vapor is subjected to heat release condensation on the surface of the circulating cooling water coil 19 in the steam cavity 16 through the double-layer louver net 14, the condensed water drops in the water collecting tank 20 below the circulating cooling water coil 19, and the water is conveyed into the water purifying tank 32 through the condensate pipe 21. The double layer louver net 14 is used for preventing the waste heat water from flashing and splashing to pollute condensed water above. Under the action of negative pressure, the non-condensable gas dissolved in the waste heat water can be desorbed and discharged and enters the steam cavity 16 together with the flash steam, and the condensation heat exchange of the steam on the surface of the circulating cooling water coil 19 can be greatly reduced, so that the vacuum degassing port 26 required to be arranged on the steam sealing cover 6 is pumped out and discharged through an external vacuum degasser. The temperature of the residual heat water after the vacuum phase change tank 2 is reduced, and the residual water is discharged downward through the U-shaped pipe 29 of the drain cover 5 and the drain valve 30 into the drain tank 31 below. Because the flash evaporation occurs on the upper surface of the residual hot water, and the gravity factor and the water flow of the lower drainage are added, the temperature of the residual hot water in the flash evaporation cavity 15 is cooled up and heated down, the heat pipe grate 17 is arranged on the vacuum phase-change tank 2, the heat pipe bundles 18 are arranged on the heat pipe grate 17, the heat pipe bundles 18 are used for transferring the heat of the residual hot water from bottom to top, the water temperature is more balanced under the disturbance of the heat pipe bundles 18, the yield of the flash evaporation steam is improved, and the waste heat recovery efficiency is improved. The decontamination degassing tank 1, the vacuum phase-change tank 2, the degassing sealing cover 4 and the steam sealing cover 6 are respectively provided with a flange short pipe, and a flange blind plate is provided with a temperature sensor and a pressure sensor. The four pressure and temperature acquisition points are used for monitoring the pressure distribution of water, steam and gas in the tank body and providing necessary parameters for the variable frequency adjustment of an external water pump and an air extractor. The two most important parameters are: the degassing pressure of the air degassing port 25 is slightly lower than the saturation pressure corresponding to the temperature of the waste heat water in the decontamination degassing tank 1, so that the overflow of impurity gas in the waste heat water is facilitated, and the deaerator is similar to the operation of a deaerator in a thermal power plant. The degassing pressure of the vacuum degassing port 26 needs to be lower than the saturation pressure corresponding to the residual heat water temperature in the flash evaporation cavity 15 and higher than the saturation pressure corresponding to the water outlet temperature of the circulating cooling water coil 19, so as to maintain the flash evaporation and condensation process in the vacuum phase change tank 2. The liquid level meter 22 on the decontamination degassing tank 1 is used for monitoring the water level, the water level is lower than the heights of the shutter net 9 and the double-layer shutter net 14 and is higher than the upper edge of the water gate 13, so that the air in the degassing cavity 12 is prevented from entering the steam cavity 16 to cause the deterioration of the flash evaporation and condensation heat exchange process.
Modification example one
As shown in fig. 2, in this modification, on the basis of the above embodiment, the circulating cooling water coil 19 is heated step by adopting a multi-tank combined+multi-stage flash evaporation method and evaporating the waste heat hot water step by step, the water outlet temperature of the circulating water is higher, and the waste heat water discharge temperature of the third flash tank 41 is lower. The first flash tank 39 and the second flash tank 40 become a cube structure, and a flash auxiliary mechanism is omitted on the basis of the above embodiment.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present invention without departing from the spirit or scope of the invention. Thus, it is intended that the present invention also include such modifications and alterations insofar as they come within the scope of the appended claims or the equivalents thereof.
The foregoing description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art, who is within the scope of the present invention, should make equivalent substitutions or modifications according to the technical solution of the present invention and the inventive concept thereof, and should be covered by the scope of the present invention.
Claims (10)
1. The sewage waste heat recovery device is characterized by comprising a decontamination degassing tank (1), wherein a vacuum phase-change tank (2) is arranged on one side of the decontamination degassing tank (1), a water gate (13) is arranged between the decontamination degassing tank (1) and the vacuum phase-change tank (2) for communication, and the water gate (13) is in a shape of a square;
the vacuum phase change tank is characterized in that a double-layer louver net (14) is fixedly connected to the position, close to the middle, inside the vacuum phase change tank (2), the vacuum phase change tank is internally isolated into a flash evaporation cavity (15) and a steam cavity (16) by the double-layer louver net (14), the flash evaporation cavity (15) is located below the steam cavity (16), a flash evaporation auxiliary mechanism is arranged inside the flash evaporation cavity (15), and a heat exchange and condensate water recovery mechanism is arranged inside the steam cavity (16).
2. The sewage waste heat recovery apparatus according to claim 1, wherein the heat exchange and condensate recovery mechanism specifically comprises: the steam cooling device comprises a circulating cooling water coil (19) fixed inside a steam cavity (16), wherein the input end and the output end of the circulating cooling water coil (19) penetrate through a vacuum phase change tank (2) and extend to the outside, a water collecting tank (20) is fixedly connected inside the steam cavity (16) below the circulating cooling water coil (19), a condensate pipe (21) is fixedly connected to the output end of the water collecting tank (20), and a water purifying tank (32) is arranged below the output port of the condensate pipe (21).
3. The sewage waste heat recovery device according to claim 2, wherein the top end of the steam cavity (16) is fixedly connected with a steam sealing cover (6), a first pressure sensor (24) is arranged in the middle of the top end of the steam sealing cover (6), a first temperature sensor (23) is arranged on one side of the first pressure sensor (24), and an air degassing port (25) is arranged on the other side of the first pressure sensor (24).
4. The sewage waste heat recovery apparatus according to claim 1, wherein the flash evaporation auxiliary mechanism specifically comprises: and the heat pipe grate (17) is fixed inside the flash evaporation cavity (15), and a plurality of heat pipe bundles (18) which are vertically arranged in parallel are arranged on the outer surface of the heat pipe grate (17).
5. The sewage waste heat recovery device according to claim 4, wherein the bottom end of the flash evaporation cavity (15) is fixedly connected with a drain sealing cover (5), the bottom end of the drain sealing cover (5) is fixedly connected with a U-shaped pipe (29), the output end of the U-shaped pipe (29) is connected with a drain valve (30), and a drain tank (31) is arranged below an output port of the drain valve (30).
6. The sewage waste heat recovery device according to claim 4 or 5, wherein a third pressure sensor (36) is fixedly connected to an outer wall of one side of the flash chamber (15), and a third temperature sensor (35) is arranged above the third pressure sensor (36).
7. The sewage waste heat recovery device according to claim 1, wherein a louver net (9) is fixedly connected to a position, close to the top end, inside the decontamination degassing tank (1), a filter screen (8) is fixedly connected to a position, close to the bottom end, inside the decontamination degassing tank (1) is sequentially separated into a degassing cavity (12), a water purifying cavity (11) and a cyclone decontamination cavity (10) from top to bottom by the louver net (9) and the filter screen (8), a liquid level meter (22) is arranged between the degassing cavity (12) and the cyclone decontamination cavity (10), a water inlet pipe (7) communicated with the cyclone decontamination cavity (10) is fixedly connected to the bottom end of the outer side surface of the decontamination degassing tank (1), and the radial direction of the water inlet pipe (7) is tangential to the lateral direction of the cyclone decontamination cavity (10).
8. The sewage waste heat recovery device according to claim 7, wherein the top end of the degassing cavity (12) is fixedly connected with a degassing sealing cover (4), a second pressure sensor (34) is fixedly connected to the middle position of the top end of the degassing sealing cover (4), a second temperature sensor (33) is arranged on one side of the second pressure sensor (34), and an air degassing port (25) is arranged on the other side of the second pressure sensor (34).
9. The sewage waste heat recovery device according to claim 7, wherein the bottom end of the cyclone decontamination cavity (10) is fixedly connected with a sediment closing cap (3), the bottom output end of the sediment closing cap (3) is connected with a drain valve (27), and a sewage draining groove (28) is arranged below an output port of the drain valve (27).
10. The sewage waste heat recovery apparatus according to claim 7, wherein a fourth temperature sensor (37) and a fourth pressure sensor (38) are provided on an outer wall of one side of the water purifying chamber (11), and the fourth temperature sensor (37) is located above the fourth pressure sensor (38).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410180355.7A CN117928279A (en) | 2024-02-18 | 2024-02-18 | Sewage waste heat recovery equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202410180355.7A CN117928279A (en) | 2024-02-18 | 2024-02-18 | Sewage waste heat recovery equipment |
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| CN117928279A true CN117928279A (en) | 2024-04-26 |
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| CN202410180355.7A Pending CN117928279A (en) | 2024-02-18 | 2024-02-18 | Sewage waste heat recovery equipment |
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