Vapor crystallization evaporator

Abstract

The utility model discloses a steam crystallization evaporator which comprises a rack, an evaporation tank, a condenser, a gas-liquid separator and a clear water tank, the evaporation tank and the clear water tank are installed in the rack, and the condenser and the gas-liquid separator are installed on the top of the rack; 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; a jacket layer is arranged at the bottom of the steam tank and provided with an air inlet pipe and an air outlet pipe, and steam is input and output through an air inlet of the air inlet pipe and an air outlet of the air outlet pipe. According to the utility model, the waste liquid is evaporated through high-temperature and high-pressure steam, 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 the technical field of wastewater treatment, in particular to a steam crystallization evaporator. Background Art

[0002] With the increasing costs of industrial wastewater and wastewater outsourcing, water resource and environmental issues have become bottlenecks hindering industrial development. Achieving zero wastewater discharge is a growing concern among businesses. Currently, evaporation is the primary method for wastewater treatment and recycling. This treatment method and process are widely used in modern industrial production. Its primary purpose is to remove water from wastewater, converting it into distilled water while simultaneously increasing its concentration to meet subsequent treatment requirements. However, evaporation generally consumes a lot of energy, leading to the use of MVR evaporators for wastewater treatment. This method allows for the recycling of vapor generated by evaporation, features a simple structure, and consumes less energy. However, in this process, whether the raw vapor generated by evaporation is directly utilized or purified through a gas-liquid separation device, the remaining concentrated wastewater has a moisture content of 40-60%. This concentrated wastewater must still be processed outsourced, which still incurs high production costs. Utility Model Content

[0003] The purpose of this utility model is to provide a steam crystallization evaporator to reduce the water content of residual concentrated waste liquid and discharge the residue in the waste liquid in the form of solid crystals, thus avoiding outsourcing processing. To achieve the above purpose, this utility model adopts the following technical solutions:

[0004] The utility model discloses a steam crystallization evaporator, comprising: a frame, an evaporation tank, a condenser, a gas-liquid separator, and a clean water tank. The evaporation tank and the clean water tank are installed inside the frame, and the condenser and the gas-liquid separator are installed on the top of the frame.

[0005] One end of the evaporation 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 exhaust outlet. The bottom of the evaporation tank is provided with a jacket layer, and an air inlet pipe and an air outlet pipe are installed on the jacket layer. Steam is input and output through the air inlet of the air inlet pipe and the air outlet on the air outlet pipe.

[0006] One end of the condenser is provided with a cooling circulating water outlet and a cooling circulating water inlet, the other end is provided with a first water vapor inlet, and the bottom of the condenser is provided with a condensed water outlet, and the condensed water outlet is connected to the clean water tank through a pipeline.

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

[0008] Furthermore, the steam crystallization evaporator further includes: a cooling water tank, the cooling water tank is provided with a cooling water inlet and a cooling water outlet, and the cooling water tank is connected to the clean water tank.

[0009] Furthermore, the evaporation tank is equipped with a sealing sleeve at the residue outlet, a cylinder with a sealing plug is installed at the other end of the sealing sleeve, and a residue discharge outlet is provided at the bottom of the sealing sleeve and a branch pipe is provided at the top; and a first cleaning liquid inlet is provided on the branch pipe.

[0010] Among them, a second cleaning liquid inlet is provided on the top of the gas-liquid separator; the cooling water tank is connected to the first cleaning liquid inlet and the second cleaning liquid inlet through a pipeline, and a first vacuum pump is installed in the passage, and the first vacuum pump is also connected to the clean water tank.

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

[0012] In addition, the transfer water tank is also provided with a third reserved drain outlet and a fourth reserved drain outlet, and the transfer water tank is installed with a second liquid level gauge.

[0013] Furthermore, a spiral scraper frame is provided inside the evaporation tank, and the spiral scraper frame is connected to a servo motor provided outside the evaporation tank through a synchronous pulley.

[0014] Furthermore, a defoaming device is installed 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 installed below the defoaming device, and the baffles are staggeredly installed on both sides of the inner wall of the gas-liquid separator.

[0016] Furthermore, the clean water tank is externally connected to a third vacuum pump, and the connecting pipe between the clean water tank and the condensed water outlet is connected to the third vacuum pump through an ejector to form a circulation path, and an electromagnetic valve and an automatic drain outlet are provided on the pipe between the third vacuum pump and the ejector.

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

[0018] After adopting the above technical solution, the utility model has the following effects:

[0019] 1. The evaporation tank in the utility model heats and evaporates the original liquid in the tank by inputting high-temperature and high-pressure steam through the bottom jacket layer, thereby reducing the water content of the residual concentrated waste liquid. After returning to room temperature, the residue in the waste liquid in the tank is discharged in the form of solid crystals, avoiding outsourcing processing.

[0020] 2. The utility model sets a spiral scraper frame in the evaporation tank, which can fully heat and evaporate the original liquid during heating and evaporation, and discharge the solid residue into the evaporation tank after crystallization, thereby reducing the residual solid residue in the evaporation tank, improving operation safety, and extending the service life of the evaporation tank.

[0021] 3. The utility model is provided with a cooling water tank, which cools the components in the device by injecting cooling water. At the same time, it can clean the components in the device, reduce the accumulation of dirt in the components, improve operation safety, and extend the service life of related components. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a three-dimensional structural diagram of the utility model.

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

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

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

[0026] Figure 5 for Figure 3 Top view of .

[0027] Figure 6 for Figure 5 DD section view.

[0028] Figure 7 for Figure 6 Enlarged view of point E.

[0029] Figure 8 for Figure 3 C-direction view.

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

[0031] Figure 10 This is a three-dimensional structural diagram of the condenser.

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

[0033] Figure 12 for Figure 11 GG section view.

[0034] Main component symbols:

[0035] 1: Frame, 2: Evaporation tank, 21: Raw liquid inlet, 22: Residue outlet, 23: Sealing sleeve, 231: Residue outlet, 232: Branch pipe, 233: First cleaning liquid inlet, 24: Cylinder, 25: Defoaming agent inlet, 26: Spiral scraper frame, 27: Jacket layer, 271: Air inlet pipe, 272: Air inlet, 273: Air outlet pipe, 274: Air outlet, 28: First water vapor outlet, 29: Servo motor, 3: Condenser, 31: First water vapor inlet, 32: Cooling circulating water outlet, 33: Cooling circulating water inlet, 34: Condensate outlet, 4: Gas-liquid separator, 41: Second water vapor inlet, 42: Second water vapor outlet, 43: Second cleaning liquid inlet, 44: Baffle, 45: Defoaming device, 5: Clean water tank, 51: First liquid level gauge, 52: Clean water filling port, 53: First reserved drain outlet, 54: Second reserved drain outlet 6: Transfer water tank, 61: Second liquid level gauge, 62: First reserved drain outlet, 63: Second reserved drain outlet, 7: Cooling water tank, 71: Cooling water inlet, 72: Cooling water outlet, 8: First vacuum pump, 9: Second vacuum pump, 10: Third vacuum pump, 11: Ejector, 12: Solenoid valve, 13: Automatic drain outlet. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the present invention more clear, the present invention is further described in detail below with reference to the accompanying drawings and embodiments.

[0037] like Figure 1 As shown, the utility model discloses a steam crystallization evaporator, comprising: a frame 1, an evaporation tank 2, a condenser 3, a gas-liquid separator 4, and a clean water tank 5. The evaporation tank 2 and the clean water tank 5 are installed inside the frame 1, and the condenser 3 and the gas-liquid separator 4 are installed on the top of the frame 1.

[0038] Combine Figure 2As shown, the evaporator 2 is provided with a raw liquid inlet 21, a residue outlet 22, and a defoaming liquid inlet 25 at one end, and a first steam outlet 28 at the other end. A jacket layer 27 is provided at the bottom of the evaporator 2. The jacket layer 27 is equipped with an air inlet pipe 271 and an air outlet pipe 273. High-temperature, high-pressure steam is input and output through the air inlet 272 of the air inlet pipe 271 and the air outlet 274 of the air outlet pipe 273. In this embodiment, the evaporator 2 heats and evaporates the raw liquid in the tank by inputting high-temperature, high-pressure steam through the bottom jacket layer 27, reducing the moisture content of the remaining concentrated waste liquid. After the waste liquid returns to room temperature, the residue in the tank is discharged as solid crystals. Simultaneously, defoaming liquid can be added to the evaporator 2 through the defoaming liquid inlet 25 to prevent excessive foaming during the heated evaporation of the raw liquid, which could affect the operation of the device.

[0039] In addition, if Figures 5 to 7 As shown, in this embodiment, a spiral scraper 26 is installed inside the evaporator 2. The spiral scraper 26 is connected to a servo motor 29 located outside the evaporator 2 via a synchronous pulley. This allows the raw liquid to be fully heated and evaporated during heating and evaporation, and the solid residue is discharged from the evaporator 2 after crystallization, thereby reducing the amount of solid residue remaining in the evaporator 2.

[0040] like Figure 10 As shown, one end of the condenser 3 is provided with a cooling circulating water outlet 32 and a cooling circulating water inlet 33, the other end is provided with a first water vapor inlet 31, and the bottom of the condenser 3 is provided with a condensed water outlet 34, which is connected to the clean water tank 5 through a pipe.

[0041] like Figure 8 and Figure 9 As shown, in this embodiment, the clean water tank 5 is externally connected to a third vacuum pump 10. The connecting pipe between the clean water tank 5 and the condensed water outlet 34 is connected to the third vacuum pump 10 via an ejector 11, forming a circulation path. A solenoid valve 12 and an automatic drain port 13 are provided on the pipe between the third vacuum pump 10 and the ejector 11. In this embodiment, this circulation path utilizes the Venturi effect to generate negative pressure in the condenser 3 and gas-liquid separator 4, which in turn generates negative pressure in the evaporation tank 2, thereby lowering the boiling point of the liquid in the evaporation tank 2.

[0042] Secondly, the top of the clean water tank 5 is also provided with a clean water filling port 52 and a first reserved drain port 53, and a second reserved drain port 54 is provided at the bottom of one side. The clean water tank 5 is also equipped with a first liquid level gauge 51. In this embodiment, the clean water tank 5 monitors the water level changes in the tank through the first liquid level gauge 51, controls the opening and closing of the solenoid valve 12, and allows the clean water in the clean water tank 5 to be discharged from the automatic drain port 13. At the same time, the first reserved drain port 53 and the second reserved drain port 54 are provided to prevent the clean water in the clean water tank 5 from being unable to be discharged in time due to a malfunction of the first liquid level gauge 51. The gas-liquid separator 4 is provided with a second water vapor inlet 41 and a second water vapor outlet 42. The second water vapor inlet 41 is connected to the first water vapor outlet 28 of the evaporation tank 2 via a pipe, and the second water vapor outlet 42 is connected to the first water vapor inlet 31 of the condenser 3 via a pipe.

[0043] like Figure 11 and Figure 12 As shown, in this embodiment, a defoaming device 45 is installed inside the gas-liquid separator 4, and the defoaming device 45 is located below the second water vapor outlet 42. Furthermore, several semicircular baffles 44 are installed below the defoaming device 45, and the baffles 44 are staggered on both sides of the inner wall of the gas-liquid separator 4. In other embodiments, a foam sensor is also installed inside the gas-liquid separator 4.

[0044] In addition, the steam crystallization evaporator also includes: a cooling water tank 7, the cooling water tank 7 is provided with a cooling water inlet 71 and a cooling water outlet 72, and the cooling water tank 7 is connected to the clean water tank 5. If the clean water content in the clean water tank 5 exceeds the quantitative amount, it can overflow into the cooling water tank 7 and be discharged through the cooling water tank 7.

[0045] Secondly, the evaporator 2 is equipped with a sealing sleeve 23 at the residue outlet 22. A cylinder 24 with a sealing plug is mounted on the other end of the sealing sleeve 23. A residue discharge port 231 is provided at the bottom of the sealing sleeve 23. The sealing plug of the cylinder 24 controls the opening and closing of the residue outlet 22 of the evaporator 2, maintaining a vacuum environment in the evaporator 2 during heating and evaporation.

[0046] Furthermore, a branch pipe 232 is provided at the top of the sealing sleeve 23, and a first cleaning liquid inlet 233 is provided on the branch pipe 232. A second cleaning liquid inlet 43 is also provided at the top of the gas-liquid separator 4. In this embodiment, the cooling water tank 7 is connected to the first cleaning liquid inlet 233 and the second cleaning liquid inlet 43 via pipes. A first vacuum pump 8 is installed in the passage and is also connected to the clean water tank 5. By pumping cooling water from the cooling water tank 7 into the evaporation tank 2, the gas-liquid separator 4, and the clean water tank 5, the cooling water is cooled and cleaned by circulating the cooling water.

[0047] In addition, if Figure 3 and Figure 4As shown, in this embodiment, the steam crystallization evaporator further includes a transfer water tank 6, which is connected to the raw liquid inlet 21 of the evaporation tank 2 via a pipeline. The transfer water tank 6 is also externally connected to a second vacuum pump 9 to pump the raw liquid into the evaporation tank 2. The transfer water tank 6 is also provided with a third reserved drain port 62 and a fourth reserved drain port 63. Furthermore, the transfer water tank 6 is equipped with a second liquid level gauge 61, which controls the flow rate of the raw liquid pumped into the evaporation tank 2. In other embodiments, a second liquid level gauge may be installed in the evaporation tank 2 to coordinate control with the transfer water tank 6. Furthermore, the third reserved drain port 62 and the fourth reserved drain port 63 are provided to prevent the raw liquid in the transfer water tank 6 from being discharged in a timely manner due to a malfunction of the second liquid level gauge 61.

[0048] The above description is only a preferred embodiment of the present invention. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed in the present invention should be included in the protection scope of the present invention.

Claims

1. A steam crystallization evaporator, characterized in that: include: A frame (1), an evaporation tank (2), a condenser (3), a gas-liquid separator (4), and a clean water tank (5), wherein the evaporation tank (2) and the clean water tank (5) are installed inside the frame (1), and the condenser (3) and the gas-liquid separator (4) are installed on the top of the frame (1); One end of the evaporation tank (2) is provided with a raw liquid inlet (21), a residue outlet (22), and a defoaming agent inlet (25), and the other end is provided with a first water vapor outlet (28), and a jacket layer (27) is provided at the bottom of the evaporation tank (2), and the jacket layer (27) is installed with an air inlet pipe (271) and an air outlet pipe (273), and steam is input and output through the air inlet (272) of the air inlet pipe (271) and the air outlet (274) on the air outlet pipe (273); One end of the condenser (3) is provided with a cooling circulating water outlet (32) and a cooling circulating water inlet (33), and the other end is provided with a first water vapor inlet (31), and a condensed water outlet (34) is provided at the bottom of the condenser (3), and the condensed water outlet (34) is connected to the clean water tank (5) through a pipeline; The gas-liquid separator (4) is provided with a second water vapor inlet (41) and a second water vapor outlet (42); the second water vapor inlet (41) is connected to the first water vapor outlet (28) of the evaporation tank (2) through a pipeline; and the second water vapor outlet (42) is connected to the first water vapor inlet (31) of the condenser (3) through a pipeline.

2. A steam crystallization evaporator according to claim 1, characterized in that, Also includes: A cooling water tank (7), wherein the cooling water tank (7) is provided with a cooling water inlet (71) and a cooling water outlet (72), and the cooling water tank (7) is connected to the clean water tank (5).

3. A steam crystallization evaporator according to claim 2, characterized in that: The evaporation tank (2) is provided with a sealing sleeve (23) at the residue outlet (22); a cylinder (24) with a sealing plug is provided at the other end of the sealing sleeve (23); a residue discharge outlet (231) is provided at the bottom of the sealing sleeve (23), and a branch pipe (232) is provided at the top; and a first cleaning liquid inlet (233) is provided on the branch pipe (232).

4. A steam crystallization evaporator according to claim 3, characterized in that: A second cleaning liquid inlet (43) is provided at the top of the gas-liquid separator (4); the cooling water tank (7) is connected to the first cleaning liquid inlet (233) and the second cleaning liquid inlet (43) through a pipeline, and a first vacuum pump (8) is installed in the passage, and the first vacuum pump (8) is also connected to the clean water tank (5).

5. A steam crystallization evaporator according to claim 1, characterized in that, Also includes: a transfer water tank (6), the transfer water tank (6) being connected to the raw liquid inlet (21) of the evaporation tank (2) via a pipeline, and the transfer water tank being externally connected to a second vacuum pump (9) for pumping the raw liquid into the evaporation tank (2); Furthermore, the transfer water tank (6) is provided with a third reserved drain outlet (62) and a fourth reserved drain outlet (63), and the transfer water tank (6) is installed with a second liquid level gauge (61).

6. A steam crystallization evaporator according to claim 1, characterized in that: A spiral scraper frame (26) is provided inside the evaporation tank (2), and the spiral scraper frame (26) is connected to a servo motor (29) provided outside the evaporation tank (2) via a synchronous pulley.

7. A steam crystallization evaporator according to claim 1, characterized in that: A defoaming device (45) is installed inside the gas-liquid separator (4), and the defoaming device (45) is arranged below the second water vapor outlet (42).

8. A steam crystallization evaporator according to claim 7, characterized in that: A plurality of semicircular baffles (44) are installed below the defoaming device (45), and the baffles (44) are staggeredly installed on both sides of the inner wall of the gas-liquid separator (4).

9. A steam crystallization evaporator according to claim 1, characterized in that: The clean water tank (5) is externally connected to a third vacuum pump (10), and a connecting pipe between the clean water tank (5) and the condensed water outlet (34) is connected to the third vacuum pump (10) through an ejector (11) to form a circulation path, and a solenoid valve (12) and an automatic drain outlet (13) are provided on the pipe between the third vacuum pump (10) and the ejector (11).

10. A steam crystallization evaporator according to claim 9, characterized in that: The top of the clean water tank (5) is also provided with a clean water filling port (52) and a first reserved drain port (53), and the bottom of one side is provided with a second reserved drain port (54), and the clean water tank (5) is installed with a first liquid level gauge (51).

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