CN114644378A - Heat pump low-temperature vacuum evaporation integrated equipment for salt-containing wastewater and working method thereof - Google Patents
Heat pump low-temperature vacuum evaporation integrated equipment for salt-containing wastewater and working method thereof Download PDFInfo
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- CN114644378A CN114644378A CN202210358228.2A CN202210358228A CN114644378A CN 114644378 A CN114644378 A CN 114644378A CN 202210358228 A CN202210358228 A CN 202210358228A CN 114644378 A CN114644378 A CN 114644378A
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- 239000002351 wastewater Substances 0.000 title claims abstract description 132
- 238000007738 vacuum evaporation Methods 0.000 title claims abstract description 40
- 150000003839 salts Chemical class 0.000 title claims abstract description 34
- 238000000034 method Methods 0.000 title claims abstract description 16
- 239000007788 liquid Substances 0.000 claims abstract description 48
- 238000001704 evaporation Methods 0.000 claims abstract description 40
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 40
- 230000008020 evaporation Effects 0.000 claims abstract description 38
- 238000000926 separation method Methods 0.000 claims description 46
- 239000003507 refrigerant Substances 0.000 claims description 28
- 238000010438 heat treatment Methods 0.000 claims description 6
- 238000007599 discharging Methods 0.000 claims description 5
- 238000009833 condensation Methods 0.000 claims description 3
- 230000005494 condensation Effects 0.000 claims description 3
- 238000011017 operating method Methods 0.000 claims 1
- 238000004065 wastewater treatment Methods 0.000 abstract description 2
- 238000004781 supercooling Methods 0.000 description 5
- 238000004821 distillation Methods 0.000 description 4
- 230000002457 bidirectional effect Effects 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 239000007791 liquid phase Substances 0.000 description 3
- 239000012071 phase Substances 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 239000002173 cutting fluid Substances 0.000 description 2
- 238000009713 electroplating Methods 0.000 description 2
- 230000008030 elimination Effects 0.000 description 2
- 238000003379 elimination reaction Methods 0.000 description 2
- 238000005530 etching Methods 0.000 description 2
- 238000005554 pickling Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012153 distilled water Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
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- 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
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
- F25B30/02—Heat pumps of the compression type
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/40—Fluid line arrangements
-
- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
- C02F2301/00—General aspects of water treatment
- C02F2301/06—Pressure conditions
- C02F2301/063—Underpressure, vacuum
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- Engineering & Computer Science (AREA)
- Hydrology & Water Resources (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Physics & Mathematics (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)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
The invention discloses a heat pump low-temperature vacuum evaporation integrated device for salt-containing wastewater and a working method thereof, relates to the technical field of wastewater treatment, and aims to solve the problems that the existing salt-containing wastewater is complex in component, secondary wastewater steam is directly compressed by MVR evaporation, so that a compressor has frequent faults and often cannot normally operate, and the multi-effect evaporation also faces the condition of unstable operation. The integrative equipment of salt waste water heat pump low temperature vacuum evaporation includes waste water tank, start heater, separating chamber, vapour and liquid separator, heat pump condenser, heat pump evaporimeter, congeals water jar, heat pump compressor, circulating water auxiliary condenser, subcooler, heat dissipator, high concentration waste water tank, charge pump, forced circulation pump, ejection of compact pump, vacuum pump, condensate pump and expansion valve, start the heater and be located between waste water tank and the separating chamber, vapour and liquid separator is located between separating chamber and the heat pump evaporimeter, the circulating water auxiliary condenser is located between heat pump condenser and the subcooler.
Description
Technical Field
The invention relates to the technical field of wastewater treatment, in particular to a salt-containing wastewater heat pump low-temperature vacuum evaporation integrated device and a working method thereof.
Background
In some industries, waste water with small treatment capacity exists, such as electroplating waste water, etching solution waste water, pickling waste water, process waste water, water-based cutting fluid and the like, and a heat pump low-temperature vacuum evaporation device is a novel evaporation process developed on the basis of an MVR (mechanical vapor recompression) process.
However, the existing salt-containing wastewater is complex in component, the MVR evaporation is adopted to directly compress the secondary wastewater steam, so that the compressor has frequent faults and often cannot normally operate, and the multi-effect evaporation also faces the condition of unstable operation, so that the existing requirements are not met, and the low-temperature vacuum evaporation integrated device for the salt-containing wastewater heat pump is provided.
Disclosure of Invention
The invention aims to provide a heat pump low-temperature vacuum evaporation integrated device for salt-containing wastewater and a working method thereof, and aims to solve the problems that the existing salt-containing wastewater in the background art is complex in component, secondary steam of the wastewater is directly compressed by MVR evaporation, so that a compressor has frequent faults and often cannot normally operate, and the multi-effect evaporation also faces the condition of unstable operation.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a contain integrative equipment of salt waste water heat pump low temperature vacuum evaporation, includes the integrative equipment of the salt waste water heat pump low temperature vacuum evaporation, contain salt waste water heat pump low temperature vacuum evaporation and include waste water jar, start-up heater, separating chamber, vapour and liquid separator, heat pump condenser, heat pump evaporator, condense water jar, heat pump compressor, circulating water auxiliary condenser, subcooler, heat eliminator, high concentration waste water jar, charge-in pump, forced circulation pump, ejection of compact pump, vacuum pump, condensate pump and expansion valve, start-up heater is located between waste water jar and the separating chamber, vapour and liquid separator is located between separating chamber and the heat pump evaporator, circulating water auxiliary condenser is located between heat pump condenser and the subcooler, heat pump compressor is located between heat pump evaporator and the heat eliminator.
In a further embodiment, a feed pump is installed between the waste water tank and the separation chamber.
In a further embodiment, a forced circulation pump is installed between the separation chamber and the heat pump condenser.
In a further embodiment, a discharge pump is installed between the separation chamber and the high-concentration wastewater tank.
In a further embodiment, a vacuum pump is mounted outside the condensate tank.
In a further embodiment, a condensate pump is installed outside the condensate tank.
In a further embodiment, an expansion valve is installed between the subcooler and the heat pump evaporator.
In a further embodiment, the evaporation vacuum pressure of the vacuum pump is 0.005-0.025 MPa, and the vacuum pump is a liquid ring pump.
A working method of salt-containing wastewater heat pump low-temperature vacuum evaporation integrated equipment comprises the following steps:
the method comprises the following steps: the wastewater to be treated is stored in the wastewater tank, the feeding pump works and part of the wastewater to be treated is conveyed to the separation chamber;
step two: the feed pump is heated to the evaporation temperature by hot water or steam through the continuous circulation of a starting heater;
step three: closing the circulation channel, starting a vacuum pump, a heat pump compressor and a forced circulation pump, and starting the system to run;
step four: after the separation chamber is operated for a period of time and the waste water in the separation chamber meets the concentration requirement, starting a feed pump, a discharge pump and a channel, and entering a normal operation mode;
step five: the normal-temperature waste water to be treated is preheated by a subcooler and a heat eliminator in sequence and then is sent into a separation chamber, and meanwhile, the supercooling and compression of the refrigerant liquid to be evaporated and the cooling of the refrigerant high-temperature gas to saturation are realized;
step six: waste water in the separation chamber is sent to a heat pump condenser by a forced circulation pump to be heated and evaporated, and meanwhile, high-pressure refrigerant gas is condensed into high-pressure refrigerant liquid;
step seven: the waste water after temperature rise returns to the separation chamber for flash evaporation, the upper part of the secondary steam is discharged, the secondary steam enters the heat pump evaporator after gas-liquid separation by the gas-liquid separator, and liquid drops return to the separation chamber;
step eight: condensing the secondary steam into condensed water in the heat pump evaporator, flowing to a water condensing tank, connecting a vacuum pump outside the water condensing tank to keep the system vacuum, and automatically discharging condensed water from the water condensing tank according to the liquid level;
step nine: the secondary steam simultaneously realizes the evaporation of the refrigerant in the heat pump evaporator, and the evaporated refrigerant is compressed by a heat pump compressor to be heated and pressurized and then is sent to a heat pump condenser to be used as a waste water heating heat source;
step ten: and discharging the concentrated wastewater, automatically discharging the concentrated wastewater by a discharge pump according to the liquid level of the separation chamber, and conveying the concentrated wastewater to a high-concentration wastewater tank.
Compared with the prior art, the invention has the beneficial effects that:
1. compared with MVR and multi-effect evaporation systems, the heat pump low-temperature vacuum evaporation integrated equipment has the characteristics of simple single effect, stable and reliable operation, no compressor failure, vacuum evaporation, low energy consumption and the like, so that the heat pump low-temperature vacuum evaporation integrated equipment is suitable for small-size waste water evaporation and waste water evaporation with complex waste water components;
2. the invention is provided with the automatic balancing device of the heat pump evaporation heat and the condensation heat, thereby realizing the automatic and stable operation of the device;
3. the secondary steam transfers heat to the working medium of the heat pump, the working medium compressed by the heat pump compressor is used for heating and evaporating wastewater after being heated and boosted, the single-effect evaporation is realized, the process is simple, the compressor compresses the refrigeration working medium, the fault-free operation is realized, and the stability is high;
4. the salt-containing wastewater heat pump low-temperature vacuum evaporation integrated equipment realizes high-pressure liquid-phase supercooling of a refrigerant and high-pressure gas-phase elimination superheating by utilizing feed wastewater, increases a circulating water auxiliary condenser 9, and starts pressurized heat to realize bidirectional energy balance.
Drawings
FIG. 1 is a process flow diagram of the heat pump low-temperature vacuum evaporation integrated equipment for salt-containing wastewater.
In the figure: 1. a waste water tank; 2. starting a heater; 3. a separation chamber; 4. a gas-liquid separator; 5. a heat pump condenser; 6. a heat pump evaporator; 7. a condensate tank; 8. a heat pump compressor; 9. a circulating water auxiliary condenser; 10. a subcooler; 11. a heat eliminator; 12. a high-concentration wastewater tank; 13. a feed pump; 14. a forced circulation pump; 15. a discharge pump; 16. a vacuum pump; 17. a condensate pump; 18. an expansion valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments.
Referring to fig. 1, an embodiment of the present invention: a heat pump low-temperature vacuum evaporation integrated device for salt-containing wastewater comprises the heat pump low-temperature vacuum evaporation integrated device for salt-containing wastewater, and the heat pump low-temperature vacuum evaporation integrated device for salt-containing wastewater comprises a wastewater tank 1, a starting heater 2, a separating chamber 3, a gas-liquid separator 4, a heat pump condenser 5, a heat pump evaporator 6, a condensate tank 7, a heat pump compressor 8, a circulating water auxiliary condenser 9, a subcooler 10, a heat dissipater 11, a high-concentration wastewater tank 12, a feeding pump 13, a forced circulating pump 14, a discharging pump 15, a vacuum pump 16, a condensate pump 17 and an expansion valve 18, wherein the starting heater 2 is positioned between the wastewater tank 1 and the separating chamber 3, the gas-liquid separator 4 is positioned between the separating chamber 3 and the heat pump evaporator 6, the circulating water auxiliary condenser 9 is positioned between the heat pump condenser 5 and the subcooler 10, the heat pump compressor 8 is positioned between the heat pump evaporator 6 and the heat dissipater 11, and the heat pump low-temperature vacuum evaporation is suitable for processing below 1.5t/h, or the wastewater with complex components can be used for treating small-sized wastewater, such as electroplating wastewater, etching solution wastewater, pickling wastewater, process wastewater, water-based cutting fluid and the like, the distilled water amount of the salt-containing wastewater heat pump low-temperature vacuum evaporation integrated equipment is 100kg/h, the distillation mode is low-temperature vacuum evaporation, the distillation process is continuous or intermittent, the evaporation temperature is 32-65 ℃, the evaporation cycle mode is forced circulation, the type of the heat pump compressor 8 is vortex, the evaporation vacuum pressure of the vacuum pump 16 is 0.005-0.025 MPa, the vacuum pump 16 is set as a liquid ring pump, the wastewater evaporation energy consumption is 0.21kwh/kg of wastewater, the salt-containing wastewater heat pump low-temperature vacuum evaporation integrated equipment utilizes the feed wastewater to realize high-pressure liquid-phase supercooling of a refrigerant, high-pressure gas phase is eliminated and overheated, the circulating water auxiliary condenser 9 is added, and pressurized heat is started to realize bidirectional energy balance.
Further, install charge pump 13 between waste water tank 1 and the separator 3, pending waste water is stored in waste water tank 1's inside, and charge pump 13 during operation carries partial pending waste water to separator 3, and charge pump 13 is heated to evaporating temperature by hot water or steam via starting heater 2 continuous circulation.
Furthermore, a forced circulation pump 14 is installed between the separation chamber 3 and the heat pump condenser 5, the waste water in the separation chamber 3 is sent to the heat pump condenser 5 by the forced circulation pump 14 to be heated and evaporated, and meanwhile, the high-pressure refrigerant gas is condensed into high-pressure refrigerant liquid.
Further, install discharge pump 15 between separator 3 and high enriched wastewater jar 12, concentrated back waste water discharge is discharged by discharge pump 15 automatically according to the 3 liquid levels in separator, and high enriched wastewater is carried to high enriched wastewater jar 12.
Further, a vacuum pump 16 is installed on the outer side of the condensate tank 7, the evaporation vacuum pressure of the vacuum pump 16 is 0.005-0.025 MPa, the vacuum pump 16 is set to be a liquid ring pump, a circulation channel is closed, the vacuum pump 16, a heat pump compressor 8 and a forced circulation pump 14 are started, the system is started and operated, the condensate tank 7 is externally connected with the vacuum pump 16 to keep the system vacuum, and the condensate tank 7 automatically discharges condensate according to the liquid level.
Further, a condensate pump 17 is installed on the outer side of the condensate tank 7, and the condensate tank 7 automatically discharges condensate through the condensate pump 17 according to the liquid level.
Further, an expansion valve 18 is installed between the subcooler 10 and the heat pump evaporator 6, and the expansion valve 18 plays roles of throttling, depressurizing and flow rate regulation.
Further, the evaporation vacuum pressure of the vacuum pump 16 is 0.005-0.025 MPa, the vacuum pump 16 is set as a liquid ring pump, a circulation channel is closed, the vacuum pump 16, the heat pump compressor 8 and the forced circulation pump 14 are started, the system is started to operate, the condensate tank 7 is externally connected with the vacuum pump 16 to keep the system vacuum, and the condensate tank 7 automatically discharges condensate according to the liquid level.
A working method of salt-containing wastewater heat pump low-temperature vacuum evaporation integrated equipment comprises the following steps:
the method comprises the following steps: the wastewater to be treated is stored in the wastewater tank 1, the feeding pump 13 works, and part of the wastewater to be treated is conveyed to the separation chamber 3;
step two: the feed pump 13 is continuously heated to the evaporation temperature by hot water or steam by starting the heater 2;
step three: closing the circulation channel, starting the vacuum pump 16, the heat pump compressor 8 and the forced circulation pump 14, and starting the system to run;
step four: after the operation is carried out for a period of time, after the wastewater in the separation chamber 3 meets the concentration requirement, the feed pump 13, the discharge pump 15 and the channel are started, and the normal operation mode is entered;
step five: the normal temperature waste water to be treated is preheated by a subcooler 10 and a heat eliminator 11 in sequence and then is sent into a separation chamber 3, and meanwhile, the supercooling and compression of the refrigerant liquid to be evaporated are realized, and the refrigerant high-temperature gas is cooled to saturation;
step six: waste water in the separation chamber 3 is sent to the heat pump condenser 5 by the forced circulation pump 14 to be heated and evaporated, and simultaneously, high-pressure refrigerant gas is condensed into high-pressure refrigerant liquid;
step seven: the heated wastewater returns to the separation chamber 3 for flash evaporation, the upper part of the secondary steam is discharged, the secondary steam enters the heat pump evaporator 6 after gas-liquid separation by the gas-liquid separator 4, and liquid drops return to the separation chamber 3;
step eight: the secondary steam is condensed into condensed water in the heat pump evaporator 6 and flows to the condensate tank 7, the condensate tank 7 is externally connected with a vacuum pump 16 to keep the system vacuum, and the condensate tank 7 automatically discharges condensate according to the liquid level;
step nine: the secondary steam simultaneously realizes the evaporation of the refrigerant in the heat pump evaporator 6, and the evaporated refrigerant is compressed by the heat pump compressor 8 to be heated and boosted to the heat pump condenser 5 as a waste water heating heat source;
step ten: the concentrated waste water is discharged, automatically discharged by a discharge pump 15 according to the liquid level of the separation chamber 3 and conveyed to a high-concentration waste water tank 12.
The working principle is as follows: when the device is used, waste water to be treated is stored in the waste water tank 1, the feed pump 13 works to convey part of the waste water to be treated to the separation chamber 3, the feed pump 13 is continuously heated to an evaporation temperature by hot water or steam through the starting heater 2, the circulation channel is closed, the vacuum pump 16, the heat pump compressor 8 and the forced circulation pump 14 are started, the system is started to operate, after the waste water in the separation chamber 3 reaches the concentration requirement after operating for a period of time, the feed pump 13, the discharge pump 15 and the channel are started to enter a normal operation mode, the waste water to be treated at normal temperature is preheated by the subcooler 10 and the heat dissipater 11 in sequence and then is conveyed to the separation chamber 3, meanwhile, the super-cooled and compressed refrigerant liquid is cooled to saturation, the waste water in the separation chamber 3 is conveyed to the heat pump condenser 5 by the forced circulation pump 14 to be heated and evaporated, and simultaneously, high-pressure refrigerant gas is condensed into high-pressure refrigerant liquid, the heated wastewater returns to the separation chamber 3 for flash evaporation, the secondary steam is discharged from the upper part, the secondary steam enters the heat pump evaporator 6 after gas-liquid separation by the gas-liquid separator 4, liquid drops return to the separation chamber 3, the secondary steam is condensed into condensed water in the heat pump evaporator 6 and flows to the condensate tank 7, the condensate tank 7 is externally connected with a vacuum pump 16 to keep the system vacuum, the condensate tank 7 automatically discharges condensate water according to the liquid level, the secondary steam realizes refrigerant evaporation in the heat pump evaporator 6 at the same time, the evaporated refrigerant is compressed by the heat pump compressor 8 for temperature rise and pressure rise and is used as a wastewater heating source for the heat pump condenser 5, the concentrated wastewater is discharged and automatically discharged by the discharge pump 15 according to the liquid level of the separation chamber 3 and is conveyed to the high-concentration wastewater tank 12, the heat pump low-temperature vacuum evaporation is suitable for treating wastewater with the temperature of less than 1.5t/h or the wastewater with complex components and can be used for treating small-size wastewater, the water evaporation capacity of the salt-containing wastewater heat pump low-temperature vacuum evaporation integrated equipment is 100kg/h, the distillation mode is low-temperature vacuum evaporation, the distillation process is continuous or intermittent, the evaporation temperature is 32-65 ℃, the evaporation circulation mode is forced circulation, the type of the heat pump compressor 8 is vortex, the evaporation vacuum pressure of the vacuum pump 16 is 0.005-0.025 MPa, the vacuum pump 16 is set to be a liquid ring pump, the energy consumption of wastewater evaporation is 0.21kwh/kg of wastewater, the salt-containing wastewater heat pump low-temperature vacuum evaporation integrated equipment utilizes feed wastewater to realize high-pressure liquid-phase supercooling of a refrigerant, high-pressure gas-phase elimination superheating, the addition of a circulating water auxiliary condenser 9 and the start of pressurized heat to realize bidirectional energy balance.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (9)
1. The utility model provides an integrative equipment of salt waste water heat pump low temperature vacuum evaporation, includes the integrative equipment of salt waste water heat pump low temperature vacuum evaporation, its characterized in that: the saliferous waste water heat pump low-temperature vacuum evaporation integrated equipment comprises a waste water tank (1), a starting heater (2), a separation chamber (3), a gas-liquid separator (4), a heat pump condenser (5), a heat pump evaporator (6), a condensate tank (7), a heat pump compressor (8), a circulating water auxiliary condenser (9), a subcooler (10), a heat dissipater (11), a high-concentration waste water tank (12), a feeding pump (13), a forced circulation pump (14), a discharge pump (15), a vacuum pump (16), a condensate pump (17) and an expansion valve (18), the starting heater (2) is positioned between the waste water tank (1) and the separation chamber (3), the gas-liquid separator (4) is positioned between the separation chamber (3) and the heat pump evaporator (6), the circulating water auxiliary condenser (9) is positioned between the heat pump condenser (5) and the subcooler (10), the heat pump compressor (8) is positioned between the heat pump evaporator (6) and the heat dissipator (11).
2. The heat pump low-temperature vacuum evaporation integrated equipment for salt-containing wastewater as claimed in claim 1, characterized in that: and a feeding pump (13) is arranged between the wastewater tank (1) and the separation chamber (3).
3. The heat pump low-temperature vacuum evaporation integrated equipment for salt-containing wastewater as claimed in claim 1, characterized in that: and a forced circulation pump (14) is arranged between the separation chamber (3) and the heat pump condenser (5).
4. The heat pump low-temperature vacuum evaporation integrated equipment for salt-containing wastewater as claimed in claim 1, characterized in that: a discharge pump (15) is arranged between the separation chamber (3) and the high-concentration wastewater tank (12).
5. The heat pump low-temperature vacuum evaporation integrated equipment for salt-containing wastewater as claimed in claim 1, characterized in that: and a vacuum pump (16) is arranged on the outer side of the condensed water tank (7).
6. The heat pump low-temperature vacuum evaporation integrated equipment for salt-containing wastewater as claimed in claim 1, characterized in that: and a water condensation pump (17) is arranged on the outer side of the water condensation tank (7).
7. The heat pump low-temperature vacuum evaporation integrated equipment for salt-containing wastewater as claimed in claim 1, characterized in that: an expansion valve (18) is arranged between the subcooler (10) and the heat pump evaporator (6).
8. The heat pump low-temperature vacuum evaporation integrated equipment for salt-containing wastewater as claimed in claim 1, characterized in that: the evaporation vacuum pressure of the vacuum pump (16) is 0.005-0.025 MPa, and the vacuum pump (16) is a liquid ring pump.
9. An operating method of the heat pump low-temperature vacuum evaporation integrated device for the salt-containing wastewater based on any one of claims 1 to 8 is characterized by comprising the following steps of:
the method comprises the following steps: the wastewater to be treated is stored in the wastewater tank (1), the feeding pump (13) works to convey part of the wastewater to be treated to the separation chamber (3);
step two: the feeding pump (13) is heated to the evaporation temperature by hot water or steam through the continuous circulation of the starting heater (2);
step three: closing the circulation channel, starting the vacuum pump (16), the heat pump compressor (8) and the forced circulation pump (14), and starting the system to run;
step four: after the separation chamber (3) is operated for a period of time, after the waste water in the separation chamber reaches the concentration requirement, a feeding pump (13), a discharging pump (15) and a channel are started, and a normal operation mode is entered;
step five: normal-temperature wastewater to be treated is preheated by a subcooler (10) and a heat dissipater (11) in sequence and then sent into a separation chamber (3), and meanwhile, the refrigerant liquid to be evaporated is subcooled and is cooled to saturation by compressed refrigerant high-temperature gas;
step six: waste water in the separation chamber (3) is sent to a heat pump condenser (5) by a forced circulation pump (14) for heating and evaporation, and meanwhile, high-pressure refrigerant gas is condensed into high-pressure refrigerant liquid;
step seven: the heated wastewater returns to the separation chamber (3) for flash evaporation, the upper part of the secondary steam is discharged, the secondary steam enters the heat pump evaporator (6) after gas-liquid separation through the gas-liquid separator (4), and liquid drops return to the separation chamber (3);
step eight: the secondary steam is condensed into condensed water in the heat pump evaporator (6), the condensed water flows to the condensed water tank (7), the condensed water tank (7) is externally connected with a vacuum pump (16) to maintain the vacuum of the system, and the condensed water tank (7) automatically discharges the condensed water according to the liquid level;
step nine: the secondary steam simultaneously realizes the evaporation of the refrigerant in the heat pump evaporator (6), and the evaporated refrigerant is compressed by the heat pump compressor (8) to be heated and pressurized and then is sent to the heat pump condenser (5) as a waste water heating heat source;
step ten: the concentrated waste water is discharged, automatically discharged by a discharge pump (15) according to the liquid level of the separation chamber (3) and conveyed to a high-concentration waste water tank (12).
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| CN202210358228.2A CN114644378A (en) | 2022-04-06 | 2022-04-06 | Heat pump low-temperature vacuum evaporation integrated equipment for salt-containing wastewater and working method thereof |
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| CN202210358228.2A CN114644378A (en) | 2022-04-06 | 2022-04-06 | Heat pump low-temperature vacuum evaporation integrated equipment for salt-containing wastewater and working method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117263295A (en) * | 2023-01-09 | 2023-12-22 | 安徽冠臻环保科技有限公司 | Evaporation treatment device for high-concentration wastewater |
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2022
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|---|---|---|---|---|
| JPH078703A (en) * | 1993-06-29 | 1995-01-13 | Takeshi Sakuma | Vacuum concentrating apparatus |
| CN102698451A (en) * | 2012-07-05 | 2012-10-03 | 大连理工大学 | Heat pump type low-temperature evaporating device and method |
| CN209459374U (en) * | 2018-11-28 | 2019-10-01 | 青岛理工大学 | Fire hose drying device with heat pump and solar energy coupled |
| CN114195212A (en) * | 2021-10-19 | 2022-03-18 | 北京清新环境技术股份有限公司 | Novel desulfurization wastewater evaporative crystallization process and equipment |
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| CN117263295A (en) * | 2023-01-09 | 2023-12-22 | 安徽冠臻环保科技有限公司 | Evaporation treatment device for high-concentration wastewater |
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