Cold trap inner flow channel pre-cooling device

Abstract

The embodiment of the utility model provides a precooling device for a flow channel in a cold trap. The precooling device comprises drying equipment, the cold trap and a vacuum pump, an upper inlet and an upper outlet of the cold trap are respectively communicated with a pipeline, one end of the pipeline arranged at the upper inlet of the cold trap is connected with drying equipment, and the inlet of the cold trap is also connected with a spiral pre-cooling structure positioned in the cold trap; the spiral pre-cooling structure is a vertical spiral pipeline, the top end of the spiral pre-cooling structure is communicated with the cold trap inlet, and the bottom end of the spiral pre-cooling structure is open; one end of the pipeline mounted at an outlet above the cold trap is connected with an inlet of the vacuum pump. According to the cold trap inner flow channel pre-cooling device, the spiral pre-cooling structure used for pre-cooling is additionally arranged, and the spiral pre-cooling structure is located between the drying equipment and the vacuum pump and arranged in the cold trap; the spiral pre-cooling structure is arranged, so that corrosive gaseous substances passing through drying equipment are pre-cooled through the spiral pre-cooling structure before entering the large cavity of the cold trap, the condensation recovery effect of the gaseous substances is improved, and the service life of the vacuum pump is prolonged.

Description

Technical Field

[0001] The present application relates to the technical field of cold traps, and in particular to a cold trap inner flow channel precooling device. Background Art

[0002] In common cold trap devices currently on the market, general gases enter the trap directly through pipelines for condensation and recovery; they are widely used for the recovery of corrosive gases.

[0003] The above-mentioned prior art has the following defects: the material gas directly enters the well, lacks pre-cooling, and directly contacts the well wall, affecting the surface temperature of the well wall and causing it to rise. In addition, the heat exchange area is small and the time it stays in the well is also short, resulting in poor condensation effect and low condensation recovery efficiency.

[0004] Therefore, a cold trap inner flow channel precooling device is proposed. Utility Model Content

[0005] The technical problem to be solved by the embodiment of the present application is that a precooling device for the flow channel in a cold trap is provided, and a spiral precooling structure for precooling is added, which is located between the drying equipment and the vacuum pump and is placed inside the cold trap; so that the corrosive gaseous substance after passing through the drying equipment is precooled by the spiral precooling structure before entering the large cavity of the cold trap, and the spiral pipeline increases the heat exchange area and prolongs the time that the gaseous substance stays in the trap, thereby improving the condensation effect of the gaseous substance, thereby achieving a good recovery effect, reducing the amount of corrosive gas flowing into the vacuum pump, and prolonging the service life of the vacuum pump, thereby protecting the vacuum pump; it solves the problem of low condensation recovery efficiency of gaseous substances in the prior art.

[0006] In order to solve the above technical problems, the embodiment of the present application proposes a precooling device for a flow channel in a cold trap, including a drying device, a cold trap and a vacuum pump; the upper inlet and the upper outlet of the cold trap are both connected and installed with a pipeline, one end of the pipeline installed at the upper inlet of the cold trap is connected to the drying device, and the inlet of the cold trap is also connected to a spiral precooling structure located inside the cold trap; the spiral precooling structure is a vertical spiral pipeline, and the top is connected to the inlet of the cold trap and the bottom is open; one end of the pipeline installed at the upper outlet of the cold trap is connected to the inlet of the vacuum pump; the vacuum pump extracts gas to provide power for the gas flow during the material drying process, the gas is dried by the drying device, and then enters the spiral precooling structure for precooling. The spiral pipeline design increases the heat exchange area, the gaseous substance is easy to condense, and the time the gaseous substance stays in the cold trap is extended, and then flows into the lower part of the large cavity of the cold trap to continue low-temperature condensation. After the precooling treatment, the condensation recovery effect of the gaseous substance is improved, and the amount of harmful gas flowing into the vacuum pump is reduced.

[0007] Furthermore, the lower cross-section of the cold trap is an arc-shaped structure, and a drain valve is connected below the cold trap.

[0008] Furthermore, a refrigeration unit is connected to one side of the cold trap.

[0009] Furthermore, it also includes a controller, which is electrically connected to the refrigeration unit, the drying equipment and the vacuum pump.

[0010] Furthermore, the controller is also electrically connected to a temperature sensor disposed inside the cold trap.

[0011] The embodiment of the present application proposes a precooling device for the flow channel in a cold trap. Compared with the prior art, a spiral precooling structure for precooling is added, which is located between the drying device and the vacuum pump and is placed inside the cold trap; the corrosive gaseous substances after the drying device are precooled by the spiral precooling structure before entering the large cavity of the cold trap. The spiral pipeline increases the heat exchange area and prolongs the time that the gaseous substances stay in the trap, thereby improving the condensation effect of the gaseous substances, thereby achieving a good recovery effect, reducing the amount of corrosive gas flowing into the vacuum pump, and prolonging the service life of the vacuum pump, thereby protecting the vacuum pump;

[0012] In summary, the present application has a simple structure, high condensation recovery efficiency, and protects the vacuum pump. The spiral pre-cooling structure is placed inside the cold trap without being hung externally. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present application.

[0014] [Description of Reference Numerals]

[0015] In the figure: 1-drying equipment; 2-refrigeration unit; 3-cold trap; 4-vacuum pump; 5-pipeline; 6-controller; 7-liquid discharge valve; 8-spiral pre-cooling structure. DETAILED DESCRIPTION

[0016] It should be noted that, in the absence of conflict, the embodiments in the present application and the features described in the embodiments may be combined with each other. The present application is further described in detail below in conjunction with the drawings and specific embodiments.

[0017] In the embodiments of the present application, if there are directional indications such as up, down, left, right, front, back..., they are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0018] In addition, in this application, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0019] Please refer to Figure 1 , the embodiment of the present application provides a cold trap inner flow channel precooling device, including a drying device 1, a cold trap 3 and a vacuum pump 4;

[0020] like Figure 1 As shown, in a specific implementation, the upper inlet and the upper outlet of the cold trap 3 are both connected and installed with a pipeline 5, one end of the pipeline 5 installed at the upper inlet of the cold trap 3 is connected to the drying device 1, and the inlet of the cold trap 3 is also connected to a spiral precooling structure 8 located inside the cold trap 3; the spiral precooling structure 8 is a vertical spiral pipeline, and the top end is connected to the inlet of the cold trap 3 and the bottom end is open; one end of the pipeline 5 installed at the upper outlet of the cold trap 3 is connected to the inlet of the vacuum pump 4; a spiral precooling structure 8 is added to the traditional cold trap. The spiral precooling structure 8 is located between the drying device 1 and the vacuum pump 4 and is placed inside the cold trap 3 without being hung outside; the corrosive gaseous substances after the drying device 1 are precooled by the spiral precooling structure 8 before entering the large cavity of the cold trap 3. The spiral pipeline increases the heat exchange area and prolongs the time that the gaseous substances stay in the trap, thereby improving the condensation effect of the gaseous substances, thereby achieving a good recovery effect, reducing the amount of corrosive gas flowing into the vacuum pump 4, and prolonging the service life of the vacuum pump 4, thereby protecting the vacuum pump 4.

[0021] Specifically, the spiral pre-cooling structure 8 adopts a stainless steel spiral pipeline, which guides the gas downward through the vertical spiral pipeline, increases the heat exchange area, and prolongs the time in the trap; at the same time, the gas is introduced into the lower part of the cavity of the cold trap 3, so that the gas is at a long distance from the outlet located above the cold trap 3, and condensation continues through this distance, which further extends the condensation path and ensures the condensation effect.

[0022] like Figure 1 As shown, as a specific technical solution, the lower cross-section of the cold trap 3 is an arc-shaped structure, and a drain valve 7 is connected below the cold trap 3 to discharge the liquid after condensation recovery.

[0023] A refrigeration unit 2 is connected to one side of the cold trap 3, and the refrigeration unit 2 is used to provide cold energy for the cold trap 3 to perform refrigeration.

[0024] Furthermore, it also includes a controller 6, which is electrically connected to the refrigeration unit 2, the drying equipment 1 and the vacuum pump 4; the controller 6 is also electrically connected to the temperature sensor arranged inside the cold trap 3, and is controlled by the controller 6. At the same time, the temperature inside the cold trap 3 is sensed by the temperature sensor to provide feedback, thereby realizing temperature control and stabilizing the temperature inside the control trap.

[0025] Working principle: the vacuum pump 4 extracts gas to provide power for the gas flow during the material drying process. The gas is dried by the drying equipment 1 and then enters the spiral pre-cooling structure 8 for pre-cooling. The spiral pipeline design increases the heat exchange area, and the gaseous substance is easily condensed, which also prolongs the time that the gaseous substance stays in the cold trap 3. Then it flows into the lower part of the large cavity of the cold trap 3 and continues to be condensed at low temperature. After the pre-cooling treatment, the condensation recovery effect of the gaseous substance is improved, and the amount of gas flowing into the vacuum pump 4 is reduced.

[0026] Although the embodiments of the present application have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A cold trap inner flow channel precooling device, characterized in that: Includes drying equipment, cold trap and vacuum pump; The upper inlet and the upper outlet of the cold trap are both connected and installed with a pipeline, one end of the pipeline installed at the upper inlet of the cold trap is connected to the drying device, and the inlet of the cold trap is also connected to a spiral precooling structure located inside the cold trap; the spiral precooling structure is a vertical spiral pipeline, and the top end is connected to the inlet of the cold trap and the bottom end is open; One end of the pipeline installed at the outlet above the cold trap is connected to the inlet of the vacuum pump; The vacuum pump extracts gas to provide power for the gas flow during the material drying process. The gas is dried by the drying equipment and then enters the spiral pre-cooling structure for pre-cooling. The spiral pipeline design increases the heat exchange area, and the gaseous substance is easily condensed, which also prolongs the time the gaseous substance stays in the cold trap. Then, the gaseous substance flows into the lower part of the large cavity of the cold trap and continues to condense. After the pre-cooling treatment, the condensation recovery effect of the gaseous substance is improved, and the amount of harmful gas flowing into the vacuum pump is reduced.

2. A cold trap inner flow channel precooling device as claimed in claim 1, characterized in that: The lower cross section of the cold trap is an arc-shaped structure, and a drain valve is connected below the cold trap.

3. A cold trap inner flow channel precooling device as claimed in claim 1, characterized in that: One side of the cold trap is connected with a refrigeration unit.

4. A cold trap inner flow channel precooling device as claimed in claim 3, characterized in that: The device also includes a controller which is electrically connected to the refrigeration unit, the drying equipment and the vacuum pump.

5. A cold trap inner flow channel precooling device as claimed in claim 4, characterized in that: The controller is also electrically connected to a temperature sensor arranged inside the cold trap.

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