Liquid seal and spiral flow dividing buffer evaporation device for low temperature evaporator

Abstract

The application belongs to the technical field of industrial evaporation concentration process, in particular to a liquid seal and spiral distribution buffer evaporation device for a low-temperature evaporator, the liquid seal is the original liquid which needs to be evaporated into an evaporation container, the distance from the liquid surface of the original liquid to the feed inlet of the evaporation container is 100-150 mm; the application pre-sets a part of the original liquid in the evaporation container, thereby generating a liquid seal, so that the feed inlet of the evaporation container is below the liquid surface, and the evaporation is above the liquid surface, thereby solving the problem that the high-temperature original liquid is easy to flash when entering the evaporation container.

Description

Technical Field

[0001] This application belongs to the field of industrial evaporation and concentration technology, specifically a liquid seal and spiral diversion buffer evaporation device for a low-temperature evaporator. Background Technology

[0002] Existing low-temperature evaporation containers are prone to flash evaporation when processing high-temperature materials. This not only causes airflow impact on the evaporation container, but also causes the gas to carry away the unevaporated original liquid in the evaporation container during the evaporation process, which is called gas-liquid entrainment. This affects the quality of the produced water and the life of the vacuum pump. Summary of the Invention

[0003] The purpose of this application is to address the shortcomings of existing technologies by pre-setting a portion of the raw liquid inside the evaporation container to create a liquid seal, so that the feed inlet of the evaporation container is below the liquid surface, while the evaporation occurs above the liquid surface, thereby solving the problem of flash evaporation when high-temperature raw liquid enters the evaporation container.

[0004] To achieve the above objectives, the following technical solution is adopted: A liquid seal for a low-temperature evaporator, wherein the liquid seal is a raw liquid that needs to be evaporated and enters the evaporation container, and the distance from the liquid surface of the raw liquid to the inlet of the evaporation container is 100-150 mm.

[0005] Preferably, the feed inlet is located at the bottom of the evaporation container, and the liquid level is 100-150 mm above the inner bottom wall of the evaporation container.

[0006] A spiral diversion buffer evaporation device for the above-mentioned liquid seal includes an evaporation container, a separation shell, and a cooler. The evaporation container has a feed inlet on its side wall near the bottom wall and a steam outlet at its top. The feed end of the separation shell is connected to the steam outlet, and the discharge end of the separation shell is connected to the feed end of the cooler. Rotating blades are provided at the feed end of the separation shell.

[0007] Preferably, the separation shell is vertically arranged, the lower part of the separation shell is funnel-shaped, the opening at the lower end of the funnel shape is smaller than the opening at the upper end, the spiral blade is located in the lower part of the funnel shape, and the steam outlet is located in the upper part of the separation shell.

[0008] Preferably, the output end of the condenser is connected to the input end of the vacuum pump, and the output end of the vacuum pump is connected to the water tank.

[0009] Preferably, the evaporator has an outlet on its side wall away from the inlet, and a discharge pipe is provided at the outlet. The end of the discharge pipe away from the evaporator is connected to a main piston via a piston rod of a cylinder. The cylinder is coaxial with the discharge pipe, the main piston cooperates with the discharge pipe, and a discharge port is provided on the side wall between the two ends of the discharge pipe.

[0010] Preferably, a feed pipe is provided at the feed inlet, and the end of the feed pipe away from the evaporation container is connected to the output port of the centrifugal pump.

[0011] Compared with the prior art, the beneficial effects of the technical solution of this application are: 1. This application creates a liquid seal by pre-setting a portion of the raw liquid inside the evaporation container, so that the feed inlet of the evaporation container is below the liquid surface, while the evaporation is above the liquid surface, thus solving the problem of easy flash evaporation when the high-temperature raw liquid enters the evaporation container.

[0012] 2. In this application, due to the presence of the liquid seal, the high-temperature raw liquid enters below the liquid surface of the liquid seal for heat exchange, without directly contacting the gas phase space, thus buffering the airflow and extending the equipment life. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this application.

[0014] Figure 2 for Figure 1 A schematic diagram of the structure on the back.

[0015] Figure 3 This is a schematic diagram illustrating the principle of this application.

[0016] Among them, 1. liquid surface; 2. feed inlet; 3. evaporation container; 4. separation shell; 5. cooler; 6. rotating blades; 7. funnel type; 8. vacuum pump; 9. water tank; 10. discharge port; 11. discharge pipe; 12. main piston; 13. cylinder; 14. discharge port; 15. feed pipe; 16. centrifugal pump. Detailed Implementation

[0017] See Figure 1-3 A liquid seal for a low-temperature evaporator, wherein the liquid seal is a raw liquid that needs to be evaporated and enters the evaporation container 3, and the distance from the liquid surface 1 of the raw liquid to the inlet 2 of the evaporation container 3 is 100-150mm.

[0018] In this embodiment, during use, the raw liquid (the liquid to be evaporated) is first introduced into the evaporation container 3 to form a liquid seal, meaning the liquid level 1 of the raw liquid is 100-150mm above the inlet 2. Then, the pressure is reduced, and the raw liquid continues to be introduced into the evaporation container 3. This causes the liquid level 1 in the evaporation container 3 to evaporate, while the raw liquid introduced into the evaporation container 3 is below the liquid level 1 and will not come into contact with the vapor (gas phase) generated in the evaporation container 3. Therefore, although the raw liquid newly introduced into the evaporation container 3 is at a high temperature, it is not immediately evaporated, so flash evaporation does not occur.

[0019] As a preferred embodiment, the feed inlet 2 is located at the bottom of the evaporation container 3, and the liquid level 1 is 100-150 mm above the inner bottom wall of the evaporation container 3. This arrangement is intended to ensure the formation of a liquid seal.

[0020] A spiral diversion buffer evaporation device for the aforementioned liquid seal includes an evaporation container 3, a separation shell 4, and a cooler 5. The evaporation container 3 has an inlet near its bottom wall on its side wall and a steam outlet at its top. The inlet end of the separation shell 4 is connected to the steam outlet, and the outlet end of the separation shell 4 is connected to the inlet end of the cooler 5. A rotating blade 6 is provided at the inlet end of the separation shell 4. With this design, the raw liquid enters the evaporation container 3, and then the interior of the evaporation container 3 is evacuated to reduce pressure, allowing the raw liquid to evaporate at a lower boiling point. The steam enters the separation shell 4 from the steam outlet. Because the rotating blade 6 is provided inside the separation shell 4, the rotating blade 6 rotates under the force applied by the steam as it enters the separation shell 4, thereby preventing some steam from entering the separation shell 4 and cooler 5 from the steam outlet, which could affect the quality of the produced water and the lifespan of the vacuum pump.

[0021] In a preferred embodiment, the separation shell 4 is vertically arranged, with its lower part shaped like a funnel 7, where the opening at the lower end is smaller than the opening at the upper end. The spiral blade 6 is located in the lower part of the funnel 7, and the steam outlet is located in the upper part of the separation shell 4. This funnel-shaped 7 arrangement facilitates the rotation of the rotating blade 6 by the steam in the evaporation container 3, and ensures that all steam leaving the evaporation container 3 through the steam outlet passes through the rotating blade 6.

[0022] As a preferred embodiment, the output of the condenser 5 is connected to the input of the vacuum pump 8, and the output of the vacuum pump 8 is connected to the water tank 9. This arrangement allows the vacuum pump 8 to depressurize the evaporator 3 and also deliver water to the water tank 9.

[0023] As a preferred embodiment, the evaporator 3 has an outlet 10 on its side wall, away from the inlet. An outlet pipe 11 is provided at the outlet 10. One end of the outlet pipe 11, away from the evaporator 3, is connected to a main piston 12 via the piston rod of a cylinder 13. The cylinder 13 is coaxial with the outlet pipe, and the main piston 12 cooperates with the outlet pipe 11. A discharge port 14 is provided on the side wall between the two ends of the outlet pipe 11. By using the cylinder 13 in conjunction with the main piston 12, impurities inside the evaporator 3 can be discharged during cleaning of the evaporator 3 after the evaporation process is completed.

[0024] As a preferred embodiment, a feed pipe 15 is provided at the feed inlet 4, and the end of the feed pipe 15 away from the evaporation container 1 is connected to the output port of the centrifugal pump 16. By providing the feed pipe 15 and the centrifugal pump 16, it is convenient to transport the liquid to be evaporated into the evaporation container 3.

Claims

1. A liquid seal for a low-temperature evaporator, characterized in that, The liquid seal is the raw liquid that needs to be evaporated in the evaporation container (3). The distance from the liquid surface (1) of the raw liquid to the feed inlet (2) of the evaporation container (3) is 100-150mm.

2. The liquid seal for a low-temperature evaporator according to claim 1, characterized in that, The feed inlet (2) is located at the bottom of the evaporation container (3), and the liquid level (1) is 100-150 mm higher than the inner bottom wall of the evaporation container (3).

3. A spiral diversion buffer evaporator for use with the liquid seal of claim 1 or 2, characterized in that, The evaporator includes an evaporator (3), a separation shell (4), and a cooler (5). The evaporator (3) has an inlet near the bottom wall on its side wall and a steam outlet at the top. The inlet of the separation shell (4) is connected to the steam outlet, and the outlet of the separation shell (4) is connected to the inlet of the cooler (5). The inlet of the separation shell (4) is provided with rotating blades (6).

4. The spiral diversion buffer evaporator according to claim 3, characterized in that, The separation shell (4) is vertically arranged, and the lower part of the separation shell (4) is funnel-shaped (7). The opening at the lower end of the funnel-shaped (7) is smaller than the opening at the upper end. The spiral blade (6) is located in the lower part of the funnel-shaped (7), and the steam outlet is located in the upper part of the separation shell (4).

5. The spiral diversion buffer evaporator according to claim 4, characterized in that, The output end of the condenser (5) is connected to the input end of the vacuum pump (8), and the output end of the vacuum pump (8) is connected to the water tank (9).

6. The spiral diversion buffer evaporator according to claim 4, characterized in that, The evaporator (3) has an outlet (10) on its side wall away from the feed inlet. The outlet (10) is provided with a discharge pipe (11). The end of the discharge pipe (11) away from the evaporator (3) is connected to a main piston (12) through the piston rod of a cylinder (13). The cylinder (13) is coaxial with the discharge pipe. The main piston (12) cooperates with the discharge pipe (11). The side wall between the two ends of the discharge pipe (11) is provided with a discharge port (14).

7. The spiral split-flow buffer evaporator according to claim 4, characterized in that, A feed pipe (15) is provided at the feed inlet (4), and the end of the feed pipe (15) away from the evaporation container (1) is connected to the output port of the centrifugal pump (16).

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