Heat pump crystallization evaporator

Abstract

The utility model discloses a heat pump crystallization evaporator which comprises a machine frame, an evaporation tank, a heat pump, a condensation fan, a condenser, a gas-liquid separator and a clean water tank, the evaporation tank, the heat pump, the condenser and the clean water tank are installed inside the machine frame, and the condensation fan and the gas-liquid separator are installed on the top of the machine frame. A stock solution inlet, a residue outlet and a defoaming agent inlet are formed in one end of the evaporation tank, a first water vapor outlet in the other end of the evaporation tank is connected with a second water vapor inlet of the gas-liquid separator through a pipeline, and the second water vapor inlet of the gas-liquid separator is connected with a first water vapor inlet of the condenser through a pipeline; meanwhile, a jacket layer is arranged at the bottom of the evaporation tank, a water inlet pipe in the jacket layer is connected with a refrigerant outlet of the heat pump, and a water outlet pipe is connected with a condensation fan through a pipeline and is connected into the clear water tank. According to the utility model, a high-temperature and high-pressure refrigerant is generated by the heat pump to evaporate the waste liquid, so that the moisture content of the residual concentrated waste liquid is reduced, and residues in the waste liquid are discharged in the form of solid crystals.

Description

TECHNICAL FIELD

[0001] The utility model relates to wastewater treatment technical field, concretely is a kind of heat pump crystallization evaporator. BACKGROUND

[0002] With the industrial production wastewater, wastewater outsourcing cost promotion, water resource and water environment problem has become the bottleneck of industrial development. How to realize the problem of wastewater zero discharge is mentioned more and more in enterprises. At present, evaporation process is the main measure of waste liquid treatment and recycling, and the treatment method and process are widely used in modern industrial production, and the purpose is basically to remove water in waste liquid, become distilled water, and improve waste liquid concentration to meet subsequent treatment requirements. Evaporation process generally has high energy consumption, so using MVR evaporator to treat sewage waste liquid is a more common way at present, which can recycle the steam generated by evaporation, and has simple structure and low energy consumption. However, in this process, whether the original liquid steam generated by evaporation is directly used or used after purification by gas-liquid separation device, the residual concentrated waste liquid has a water content of 40-60%, and this part of concentrated waste liquid still needs to be outsourced for treatment, which still has high production cost. SUMMARY

[0003] The utility model aims at providing a kind of heat pump crystallization evaporator to reduce the water content of residual concentrated waste liquid, and make the residue in waste liquid in the form of solid crystal discharge. To achieve the above purpose, the utility model uses the following technical solutions:

[0004] The utility model discloses a kind of heat pump crystallization evaporator, comprising: rack, evaporating tank, heat pump, condensing fan, condenser, gas-liquid separator and clean water tank, the evaporating tank, heat pump, condenser and the clean water tank are installed in the inside of the rack, the condensing fan and gas-liquid separator are installed in the top of the rack.

[0005] One end of the evaporating tank is provided with a raw liquid inlet, a residue outlet and a defoaming agent inlet, and the other end is provided with a first water vapor outlet. A jacket layer is arranged at the bottom of the evaporating tank. A water inlet pipe and a water outlet pipe are installed in the jacket layer. The water inlet pipe is connected to the refrigerant outlet of the heat pump to input the refrigerant generated by the heat pump into the jacket layer. The refrigerant is cooled in the condensing fan through a pipeline from the water outlet pipe and then discharged into the clean water tank.

[0006] One end of the condenser is provided with a first water vapor inlet, and the other end is provided with a condensate water outlet. The condensate water outlet is connected to the clean water tank through a pipeline. A cooling circulating water outlet and a cooling circulating water inlet are arranged on one side of the condenser. The cooling circulating water inlet is connected to the clean water tank, and the cooling circulating water outlet is connected to the refrigerant inlet of the heat pump.

[0007] The gas-liquid separator is provided with a second water vapor inlet connected with the first water vapor outlet of the evaporation tank through a pipeline and a second water vapor outlet connected with the first water vapor inlet of the condenser through a pipeline.

[0008] Further, the evaporation tank is provided with a sealing sleeve at the residue outlet, the other end of the sealing sleeve is provided with a cylinder with a sealing plug, the bottom of the sealing sleeve is provided with a residue discharge outlet, and the top of the sealing sleeve is provided with a branch pipe; and the branch pipe is provided with a first cleaning liquid inlet.

[0009] The gas-liquid separator is provided with a second cleaning liquid inlet, the first cleaning liquid inlet and the second cleaning liquid inlet are connected with the clean water tank through a pipeline, and a first vacuum pump is installed in the passage to pump cleaning liquid into the sealing sleeve and the gas-liquid separator.

[0010] Further, the inside of the evaporation tank is provided with a spiral scraper holder connected with a motor arranged outside the evaporation tank through a synchronous pulley.

[0011] Further, the heat pump crystallization evaporator further comprises a transfer water tank connected with the raw liquid inlet of the evaporation tank through a pipeline, and the transfer water tank is externally connected with a second vacuum pump to pump raw liquid into the evaporation tank.

[0012] The transfer water tank is further provided with a third reserved drain outlet and a fourth reserved drain outlet, and the transfer water tank is provided with a second liquid level meter.

[0013] Further, a first oil separator is arranged between the water inlet pipe of the jacket layer and the passage of the refrigerant outlet of the heat pump; and a second oil separator is arranged between the cooling circulating water outlet of the condenser and the passage of the refrigerant inlet of the heat pump.

[0014] Further, a defoaming device is arranged inside the gas-liquid separator, and the defoaming device is arranged below the second water vapor outlet.

[0015] Preferably, a plurality of semicircular baffles are arranged below the defoaming device, and the baffles are arranged on both sides of the inner wall of the gas-liquid separator.

[0016] Further, the clean water tank is externally connected with a third vacuum pump, the connecting pipeline between the clean water tank and the condenser water outlet is connected with the third vacuum pump through a jet device to form a circulating passage, and an electromagnetic valve and an automatic drain outlet are arranged on the pipeline between the third vacuum pump and the jet device.

[0017] The water tank is equipped with a water filling port and a first reserved drain port on the top, and a second reserved drain port on the bottom of one side. The water tank is also equipped with a first level gauge.

[0018] After adopting the above technical solution, the present invention has the following effects:

[0019] 1. The evaporator in this utility model heats and evaporates the original liquid in the tank by introducing high-temperature and high-pressure refrigerant into the bottom jacket layer, thereby reducing the water content of the residual concentrated waste liquid. After the low-temperature refrigerant is introduced, the residue in the waste liquid in the tank is discharged in the form of solid crystals, reducing the subsequent processing steps, shortening the production process, and improving production efficiency.

[0020] 2. This utility model is equipped with a spiral scraper in the evaporator, which can fully heat and evaporate the original liquid during heating and evaporation, and discharge the solid residue into the evaporator after crystallization, thereby reducing the residue of solid residue in the evaporator, improving operational safety, and extending the service life of the evaporator.

[0021] 3. This utility model is equipped with an oil separator, which can separate the oil in the refrigerant, prevent oil-containing refrigerant from entering the passage and thus affecting the evaporation efficiency, while improving operational safety and extending the service life of related components. Attached Figure Description

[0022] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0023] Figure 2 for Figure 1 Enlarged view of point A.

[0024] Figure 3 This is a diagram of the internal structure of this utility model.

[0025] Figure 4 for Figure 3 Enlarged view of point B.

[0026] Figure 5 for Figure 3 The C-direction view.

[0027] Figure 6 for Figure 5 Enlarged view of point D.

[0028] Figure 7 for Figure 3 Top view.

[0029] Figure 8 for Figure 7 EE-directed cross-sectional view.

[0030] Figure 9 for Figure 8 Enlarged view of point F.

[0031] Figure 10 A perspective view of the heat pump.

[0032] Figure 11 A top view of the gas-liquid separator.

[0033] Figure 12 A Figure 11 G-G sectional view.

[0034] Main component symbols:

[0035] 1: rack, 2: evaporation tank, 21: raw liquid inlet, 22: residue outlet, 23: sealing sleeve, 231: residue discharge outlet, 232: branch pipe, 233: first cleaning liquid inlet, 24: cylinder, 25: defoaming agent inlet, 26: spiral scraper frame, 27: jacket layer, 271: water inlet pipe, 272: water outlet pipe, 28: first water vapor outlet, 29: motor, 3: heat pump, 31: refrigerant inlet, 32: refrigerant outlet, 4: condensing fan, 5: condenser, 51: first water vapor inlet, 52: condensate water outlet, 53: cooling circulating water inlet, 54: cooling circulating water outlet, 6: gas-liquid separator, 61: second water vapor inlet, 62: second water vapor outlet, 63: second cleaning liquid inlet, 64: baffle, 65: defoaming device, 7: clean water tank, 71: first liquid level meter, 72: clean water filling port, 73: first reserved drain port, 74: second reserved drain port, 8: transfer water tank, 81: second liquid level meter, 82: third reserved drain port, 83: fourth reserved drain port, 9: first oil separator, 10: second oil separator, 11: first vacuum pump, 12: second vacuum pump, 13: third vacuum pump, 14: jet device, 15: electromagnetic valve, 16: automatic drain port. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical scheme and advantages of the utility model more clearly, the following will be further detailed in combination with the drawings and examples.

[0037] As Figures 1 to 12 shown, the utility model discloses a heat pump crystallization evaporator, include: rack 1, evaporation tank 2, heat pump 3, condensing fan 4, condenser 5, gas-liquid separator 6 and clean water tank 7, evaporation tank 2, heat pump 3, condenser 5 and clean water tank 7 install in the inside of rack 1, and condensing fan 4 and gas-liquid separator 6 install on the top of rack.

[0038] The evaporation tank 2 is provided with a raw liquid inlet 21, a residue outlet 22 and a defoaming agent inlet 25 at one end, and a first water vapor outlet 28 at the other end, and the bottom of the evaporation tank 2 is provided with a jacket layer 27, which is provided with a water inlet pipe 271 and a water outlet pipe 272, the water inlet pipe 271 is connected with the refrigerant outlet 32 of the heat pump 3 to input the refrigerant produced by the heat pump 3 into the jacket layer 27, and the refrigerant is discharged into the condenser fan 4 through the pipe for cooling, and then discharged into the clean water tank 7.

[0039] In this embodiment, the high-temperature and high-pressure refrigerant input into the jacket layer 27 at the bottom of the evaporation tank 2 by the heat pump 3 is used to heat and evaporate the raw liquid in the tank, thereby reducing the water content of the residual concentrated waste liquid, and after the tank returns to room temperature, the residue in the waste liquid in the tank is discharged in the form of solid crystals, and at the same time, defoaming liquid can be added to the evaporation tank 2 through the defoaming liquid inlet 25 to avoid excessive foam generated during the heating and evaporation of the raw liquid affecting the operation of the device.

[0040] In addition, in this embodiment, the evaporation tank 2 is provided with a spiral scraper holder 26 inside, which is connected with a motor 29 arranged outside the evaporation tank 2 through a synchronous belt pulley. During heating and evaporation, the raw liquid can be fully heated and evaporated, and after the solid residue crystallizes, it is discharged from the evaporation tank 2, reducing the residue of solid residue in the evaporation tank 2.

[0041] At the same time, the evaporation tank 2 is provided with a sealing sleeve 23 at the residue outlet 22, the other end of the sealing sleeve 23 is provided with a cylinder 24 with a sealing plug, and the bottom of the sealing sleeve 23 is provided with a residue discharge outlet 231, and the top is provided with a branch pipe 232; and the branch pipe 232 is provided with a first cleaning liquid inlet 233. The sealing plug of the cylinder 24 can control the opening and closing of the residue outlet 22 of the evaporation tank 2, and ensure the vacuum environment in the evaporation tank 2 during heating and evaporation.

[0042] The condenser 5 is provided with a first water vapor inlet 51 at one end, and a condensate water outlet 52 at the other end, and the condensate water outlet 52 is connected with the clean water tank 7 through a pipe, and one side of the condenser 5 is provided with a cooling circulating water outlet 54 and a cooling circulating water inlet 53, wherein the cooling circulating water inlet 53 is connected with the clean water tank 7, and the cooling circulating water outlet 54 is connected with the refrigerant inlet 31 of the heat pump 3.

[0043] In this embodiment, the clean water tank 7 is connected with a third vacuum pump 13, the connecting pipe between the clean water tank 7 and the condensate water outlet 52 is connected with the third vacuum pump 13 through a jet device 14, forming a circulating path, and the pipe between the third vacuum pump 13 and the jet device 14 is provided with an electromagnetic valve 15 and an automatic drain 16. In this embodiment, the circulating path utilizes the Venturi effect to generate negative pressure in the condenser 5 and the gas-liquid separator 6, and then generates negative pressure in the evaporation tank 2, thereby reducing the boiling point of the liquid in the evaporation tank 2.

[0044] Secondly, in the present embodiment, a first oil separator 9 is arranged in the passage between the water inlet pipe 271 of the jacket layer 27 and the refrigerant outlet 32 of the heat pump 3; a second oil separator 10 is arranged in the passage between the cooling circulating water outlet 54 of the condenser 5 and the refrigerant inlet 31 of the heat pump 3. By arranging the oil separators, the oil in the refrigerant can be separated, the oil-containing refrigerant is prevented from entering the passage, thereby affecting the evaporation efficiency, and the operation safety is improved, and the service life of the related components is prolonged.

[0045] Meanwhile, the top of the clean water tank 7 is further provided with a clean water filling port 72 and a first reserved drainage port 73, and the bottom of one side is provided with a second reserved drainage port 74, and the clean water tank 7 is installed with a first liquid level meter 71. In the present embodiment, the clean water tank 7 monitors the water level change of the clean water in the tank through the first liquid level meter 71, controls the opening and closing of the electromagnetic valve 15, so that the clean water in the clean water tank 7 is discharged from the automatic drainage port 16. At the same time, the first reserved drainage port 73 and the second reserved drainage port 74 are arranged to prevent the clean water in the clean water tank 7 from being discharged in time due to the failure of the first liquid level meter 71.

[0046] The gas-liquid separator 6 is provided with a second water vapor inlet 61 and a second water vapor outlet 62, the second water vapor inlet 61 is connected with the first water vapor outlet 28 of the evaporation tank 2 through a pipeline, and the second water vapor outlet 62 is connected with the first water vapor inlet 51 of the condenser 5 through a pipeline.

[0047] The gas-liquid separator 6 is provided with a second water vapor inlet 61 and a second water vapor outlet 62, the second water vapor inlet 61 is connected with the first water vapor outlet 28 of the evaporation tank 2 through a pipeline, and the second water vapor outlet 62 is connected with the first water vapor inlet 51 of the condenser 5 through a pipeline.

[0048] In the present embodiment, the gas-liquid separator 6 is internally installed with a defoaming device 65, and the defoaming device 65 is arranged below the second water vapor outlet 62. Furthermore, a plurality of semicircular baffles 64 are installed below the defoaming device 65, and the baffles 64 are alternately installed on both sides of the inner wall of the gas-liquid separator 6. In other embodiments, a foam sensor is also installed inside the gas-liquid separator 6.

[0049] In addition, the heat pump crystallization evaporator further comprises: a transfer water tank 8, the transfer water tank 8 is connected with the raw liquid inlet 21 of the evaporation tank 2 through a pipeline, and the transfer water tank 8 is connected with the second vacuum pump 12, and the raw liquid is pumped into the evaporation tank 2. Furthermore, the transfer water tank 8 is further provided with a third reserved drainage port 82 and a fourth reserved drainage port 83, and the transfer water tank 8 is installed with a second liquid level meter 81.

[0050] In the embodiment, the transit water tank 8 controls the flow of the raw liquid pumped into the evaporation tank 2 through the second liquid level meter 81. In other embodiments, another liquid level meter can be installed in the evaporation tank 2 to cooperate with the transit water tank 8 for control. Meanwhile, the third and fourth reserved drainage openings 82 and 83 are arranged to prevent the raw liquid in the transit water tank 8 from being unable to be discharged in time due to the failure of the second liquid level meter 81.

[0051] The above merely describes a preferred specific implementation of the present application, and any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which shall be covered by the protection scope of the present application.

Claims

1. A heat pump crystallization evaporator, characterized in that, It includes: Rack (1), evaporating tank (2), heat pump (3), condenser fan (4), condenser (5), gas-liquid separator (6) and clean water tank (7), the evaporating tank (2), heat pump (3), condenser (5) and the clean water tank (7) are installed inside the rack (1), the condenser fan (4) and gas-liquid separator (6) are installed on the top of the rack; One end of the evaporating tank (2) is provided with raw liquid inlet (21), residue outlet (22), defoaming agent inlet (25), the other end is provided with first water vapor outlet (28), and the bottom of the evaporating tank (2) is provided with jacket layer (27), the jacket layer (27) is installed with water inlet pipe (271) and water outlet pipe (272), the water inlet pipe (271) is connected with the refrigerant outlet (32) of the heat pump (3), so as to input the refrigerant produced by the heat pump (3) into the jacket layer (27), and the refrigerant is discharged into the condenser fan (4) through the pipeline, and then discharged into the clean water tank (7); One end of the condenser (5) is provided with first water vapor inlet (51), the other end is provided with condensate water outlet (52), and the condensate water outlet (52) is connected with the clean water tank (7) through the pipeline, and one side of the condenser (5) is provided with cooling circulating water outlet (54) and cooling circulating water inlet (53), wherein the cooling circulating water inlet (53) is connected with the clean water tank (7), and the cooling circulating water outlet (54) is connected with the refrigerant inlet (31) of the heat pump (3); The gas-liquid separator (6) is provided with second water vapor inlet (61) and second water vapor outlet (62), the second water vapor inlet (61) is connected with the first water vapor outlet (28) of the evaporating tank (2) through the pipeline, and the second water vapor outlet (62) is connected with the first water vapor inlet (51) of the condenser (5) through the pipeline.

2. A heat pump crystallization evaporator as claimed in claim 1, characterized in that: The evaporating tank (2) is provided with a sealing sleeve (23) at the residue outlet (22), the other end of the sealing sleeve (23) is provided with a cylinder (24) with a sealing plug, and the bottom of the sealing sleeve (23) is provided with a residue discharge outlet (231), and the top is provided with a branch pipe (232); And the branch pipe (232) is provided with a first cleaning liquid inlet (233).

3. A heat pump crystallization evaporator as claimed in claim 2, characterized in that: The gas-liquid separator (6) is provided with a second cleaning liquid inlet (63), the first cleaning liquid inlet (233) and the second cleaning liquid inlet (63) are connected with the clean water tank (7) through the pipeline, and a first vacuum pump (11) is installed in the passage, which pumps the cleaning liquid into the sealing sleeve (23) and the gas-liquid separator (6).

4. A heat pump crystallization evaporator as claimed in claim 1, characterized in that: The inside of the evaporating tank (2) is provided with a spiral scraper frame (26), which is connected with a motor (29) arranged outside the evaporating tank (2) through a synchronous belt pulley.

5. A heat pump crystallization evaporator as claimed in claim 1, characterized in that It also includes: A transfer water tank (8) is connected with the raw liquid inlet (21) of the evaporation tank (2) through a pipeline, and the transfer water tank (8) is connected with a second vacuum pump (12) to pump the raw liquid into the evaporation tank (2); The transfer water tank (8) is also provided with a third reserved drain port (82) and a fourth reserved drain port (83), and the transfer water tank (8) is installed with a second liquid level meter (81).

6. A heat pump crystallization evaporator as claimed in claim 1, characterized in that: A first oil separator (9) is arranged between the water inlet pipe (271) of the jacket layer (27) and the refrigerant outlet (32) of the heat pump (3); and a second oil separator (10) is arranged between the cooling circulating water outlet (54) of the condenser (5) and the refrigerant inlet (31) of the heat pump (3).

7. A heat pump crystallization evaporator as claimed in claim 1, characterized in that: A defoaming device (65) is installed inside the gas-liquid separator (6), and the defoaming device (65) is arranged below the second water vapor outlet (62).

8. A heat pump crystallization evaporator as claimed in claim 7, characterized in that: A plurality of semicircular baffles (64) are installed below the defoaming device (65), and the baffles (64) are staggered and installed on both sides of the inner wall of the gas-liquid separator (6).

9. A heat pump crystallization evaporator as claimed in claim 1, characterized in that: The clean water tank (7) is connected with a third vacuum pump (13), a connecting pipeline between the clean water tank (7) and the condenser water outlet (52) is connected with the third vacuum pump (13) through a jetifier (14) to form a circulating path, and an electromagnetic valve (15) and an automatic drain port (16) are arranged on the pipeline between the third vacuum pump (13) and the jetifier (14).

10. A heat pump crystallization evaporator as claimed in claim 9, characterized in that: The top of the clean water tank (7) is also provided with a clean water filling port (72) and a first reserved drain port (73), one side of the bottom is provided with a second reserved drain port (74), and the clean water tank (7) is installed with a first liquid level meter (71).

Images