A small high-pressure-resistant anticorrosive exhaust valve suitable for micro-channel gas-liquid reaction

Abstract

The utility model relates to gas -liquid microchannel reactor equipment field especially is concerned with a kind of small high-pressure-resistant anticorrosive exhaust valve suitable for microchannel gas-liquid reaction, solve the problem of not adapting microchannel reactor pipeline exhaust valve, simple structure, small, including the valve body of inner cavity, the bottom of the valve body is equipped with the interface of the intercommunication cavity, the top of the valve body is provided with cover plate, the cover plate is equipped with the exhaust pipe of the intercommunication cavity, the top of the exhaust pipe is equipped with the taper mouth that gradually reduces from below to above;The cavity is equipped with a float ball, the top of the float ball is equipped with the top pin that can move up and down in the exhaust pipe, the top pin is equipped with the taper head that can be matched with the taper mouth and closed.

Description

Technical Field

[0001] This utility model relates to the field of gas-liquid microchannel reactor equipment, and in particular to a small, high-pressure resistant, corrosion-resistant exhaust valve suitable for microchannel gas-liquid reactions. Background Technology

[0002] Microchannel reactors are miniature reactors manufactured using precision machining techniques, with feature sizes ranging from 10 to 300 micrometers (or 1000 micrometers). The "micro" in microreactor refers to the micrometer-level channel size of the process fluid, not the small physical size of the microreactor or the low yield of the product. Microreactors can contain millions or even tens of millions of microchannels, thus achieving very high throughput. Due to their superior heat and mass transfer capabilities, they will be widely used in fields such as chemistry, chemical engineering, energy, and the environment.

[0003] The most common type is the gas-liquid microchannel reactor, which introduces gaseous and liquid media through microchannels for mixing and reaction, before the mixture flows through corresponding pipelines to the next device. During operation, exhaust valves need to be installed on the pipelines to discharge excess gas from the mixture into other recovery devices. However, due to the relatively small inner diameter of the pipelines, conventional exhaust valves are unsuitable for microchannel reactors and are too bulky. Although exhaust valves suitable for microchannel reactors are available on the market, their complex structure and susceptibility to damage limit their widespread adoption. Utility Model Content

[0004] This invention provides a small, high-pressure resistant, corrosion-resistant exhaust valve suitable for microchannel gas-liquid reactions, solving the problem of the lack of exhaust valves suitable for microchannel reactor pipelines. It has a simple structure and small size.

[0005] This utility model is achieved through the following technical solution:

[0006] A small, high-pressure resistant, corrosion-resistant exhaust valve suitable for microchannel gas-liquid reactions includes a valve body with an internal cavity, an interface at the bottom of the valve body communicating with the cavity, a cover plate at the top of the valve body, an exhaust pipe communicating with the cavity on the cover plate, and a tapered opening at the top of the exhaust pipe that gradually narrows from bottom to top.

[0007] The cavity is equipped with a float ball, and the top of the float ball is equipped with a pin that can move up and down in the exhaust pipe. The upper end of the pin is equipped with a cone that can cooperate with the conical opening to close.

[0008] Furthermore, a float support is provided inside the cavity of the valve body. The float support is a cylindrical structure with an open upper end and a closed lower end. The upper end of the float support is fixed to the bottom of the cover plate, and the float is disposed inside the float support and can move up and down.

[0009] The side wall of the float support has multiple slots.

[0010] Furthermore, the bottom of the float support is provided with a downwardly protruding arc-shaped baffle.

[0011] Furthermore, the valve body has a flange edge on its top outer side, and the edge of the cover plate is detachably connected to the flange edge of the valve body by a bolt assembly;

[0012] The inner wall of the valve body has an annular protrusion near its top, and the outer side of the upper end of the float support has a flange along the circumferential direction. The flange of the float support is fitted onto the annular protrusion.

[0013] The cover plate and the flange together clamp the annular protrusion, thereby fixing the upper end of the float support to the bottom of the cover plate.

[0014] Furthermore, the outer side of the exhaust pipe is provided with external threads and is threaded to the center position of the cover plate.

[0015] Furthermore, the valve body is made of 304 stainless steel, and the inner wall of the valve body, the inner wall of the exhaust pipe, and the outer wall of the ejector pin are all coated with polytetrafluoroethylene material.

[0016] The float is a hollow plastic ball, and both the float holder and the float are made of polytetrafluoroethylene (PTFE).

[0017] The beneficial effects achieved by this utility model compared with the prior art are as follows:

[0018] 1. The small high-pressure resistant and corrosion-resistant exhaust valve of this utility model is installed at the high point of the pipeline that needs to be vented. When the gas in the pipeline gradually increases, the liquid level in the valve body decreases, causing the float to move downwards and the cone of the ejector pin to disengage from the conical opening of the exhaust pipe, allowing the gas to be discharged through the exhaust pipe. When the gas in the pipeline decreases, the liquid level in the valve body rises, and the cone of the ejector pin re-inserts into the conical opening of the exhaust pipe to seal the exhaust pipe.

[0019] This utility model has a simple overall structure and small size, and is perfectly suited to be used as an exhaust valve in microchannel reactor pipelines.

[0020] 2. The float support is a cylindrical structure with an open top and a closed bottom. The float is located inside the float support, which can limit the float and prevent it from falling out, thus improving the stability of use.

[0021] 3. The bottom of the float support is equipped with a downward-protruding arc-shaped baffle. When liquid and gas enter the valve body, they hit the arc-shaped baffle and the gas will rise from all sides, making it easier for the gas to be discharged.

[0022] 4. The valve body is made of 304 stainless steel. The inner wall of the valve body, the inner wall of the exhaust pipe, and the outer wall of the ejector pin are all coated with PTFE material. The float is a hollow plastic ball. Both the float support and the float are made of PTFE material. When corrosive gases (such as HCl gas, chlorine gas, etc.) are generated during the reaction, the exhaust valve has good corrosion resistance. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the internal structure of the small high-pressure resistant and corrosion-resistant exhaust valve described in this utility model;

[0024] Figure 2 This is a three-dimensional schematic diagram of the float support described in this utility model;

[0025] In the diagram: 1. Valve body, 11. Flange edge, 12. Annular protrusion, 2. Cover plate, 3. Exhaust pipe, 4. Conical opening, 5. Float, 6. Float support, 61. Groove, 62. Arc baffle, 63. Flange, 7. Ejector pin, 8. Conical head. Detailed Implementation

[0026] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0027] In the description of the utility model, it should be understood that the terms "front", "rear", "up", "down", "left", "right", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0028] Taking the application at a high point in the pipeline of a gas-liquid microchannel reactor as an example, this embodiment discloses a small, high-pressure resistant, corrosion-resistant exhaust valve suitable for microchannel gas-liquid reactions, such as... Figures 1-2 As shown, it mainly includes a valve body 1, a cover plate 2, an exhaust pipe 3, a float 5, a float support 6, and a pin 7.

[0029] The valve body 1 is made of 304 stainless steel and has a cylindrical inner cavity. The inner wall of the valve body 1 is coated with polytetrafluoroethylene (PTFE). An interface connecting to the cavity is machined at the bottom of the valve body 1 for high-point connection of the microchannel reactor's tubing. The inner diameter of the microchannel reactor's tubing is typically 6-10 mm; therefore, the outer diameter of the interface on the valve body 1 is designed to be 6-10 mm.

[0030] A flange edge 11 with threaded holes is machined on the top outer side of the valve body 1. The edge of the cover plate 2 can be detachably connected to the flange edge 11 of the valve body 1 via a bolt assembly. The outer side of the exhaust pipe 3 is provided with external threads and is threaded to the center of the cover plate 2. The top of the exhaust pipe 3 is machined with a tapered opening 4 that gradually narrows from bottom to top. The exhaust pipe 3 connects to the cavity of the valve body 1. An annular protrusion 12 is machined on the inner wall of the valve body 1 near its top. The float support 6 is a cylindrical structure with an open top and a closed bottom. Multiple elongated slots 61 are machined on the side wall of the float support 6. A drain hole is also machined at the bottom of the float support 6 so that liquid can be discharged from the float support 6 when the liquid level in the valve body drops. A flange 63 is machined along the circumferential direction on the outer upper end of the float support 6. The flange 63 of the float support 6 is assembled onto the annular protrusion 12. The cover plate 2 and the flange 63 together clamp the annular protrusion 12 to fix the upper end of the float support 6 to the bottom of the cover plate 2. A downwardly protruding arc-shaped baffle 62 is machined on the bottom of the float support 6, and the arc-shaped baffle 62 faces the interface.

[0031] A float 5 is housed within a float holder 6 and can move up and down. The float 5 is a hollow plastic ball, and both the float holder 6 and the float 5 are made of polytetrafluoroethylene (PTFE). A ejector pin 7 is located on top of the float 5 and is fitted into the exhaust pipe 3, allowing it to move up and down within the exhaust pipe 3. The upper end of the ejector pin 7 is machined with a conical head 8 that mates with the conical opening 4 to close. The inner wall of the exhaust pipe 3 and the outer wall of the ejector pin 7 are both coated with PTFE.

[0032] The specific working process of the small, high-pressure resistant, corrosion-resistant exhaust valve applicable to microchannel gas-liquid reactions described in this embodiment is as follows:

[0033] This exhaust valve should be installed at a high point in the pipeline. If corrosive gases (such as HCl or chlorine) are generated during the reaction, they will flow with the liquid. As the gas in the pipeline gradually increases and passes through the exhaust valve, the liquid level in the valve body decreases, causing the float to move downwards. The cone of the ejector pin disengages from the conical opening of the exhaust pipe, and subsequent liquid and gas enter the valve body 1. The bottom of the float support 6 has an arc-shaped baffle 62. Gas hitting the arc-shaped baffle 62 will rise from all sides, pass through the grooves 61 around the float support 6, and finally be discharged through the exhaust pipe. When no gas is generated, the liquid level in the valve body will rise, holding the float in place. The ejector pin on the float will block the conical opening of the exhaust pipe, thus forming a sealed cavity. When the liquid level in the valve body drops, the float will also drop, continuing to exhaust gas. This utility model has a simple overall structure and small size, making it perfectly suited for use as an exhaust valve in microchannel reactor pipelines.

Claims

1. A small, high-pressure resistant, corrosion-resistant exhaust valve suitable for microchannel gas-liquid reactions, comprising a valve body (1) with an internal cavity, characterized in that, The bottom of the valve body (1) is provided with an interface that connects to the cavity, and the top of the valve body (1) is provided with a cover plate (2). The cover plate (2) is provided with an exhaust pipe (3) that connects to the cavity, and the top of the exhaust pipe (3) is provided with a tapered opening (4) that gradually narrows from bottom to top. The cavity is provided with a float (5), and the top of the float (5) is provided with a pin (7) that can move up and down in the exhaust pipe (3). The upper end of the pin (7) is provided with a cone (8) that can cooperate with the conical opening (4) to close.

2. The small high-pressure resistant and corrosion-resistant exhaust valve according to claim 1, characterized in that, The valve body (1) is provided with a float support (6) in its cavity. The float support (6) is a cylindrical structure with an open top and a closed bottom. The upper end of the float support (6) is fixed to the bottom of the cover plate (2). The float (5) is set in the float support (6) and can move up and down. The side wall of the float support (6) is provided with multiple slots (61).

3. The small high-pressure resistant and corrosion-resistant exhaust valve according to claim 2, characterized in that, The bottom of the float support (6) is provided with a downward-protruding arc-shaped baffle (62).

4. The small high-pressure resistant and corrosion-resistant exhaust valve according to claim 2, characterized in that, The valve body (1) has a flange edge (11) on its top outer side, and the edge of the cover plate (2) is detachably connected to the flange edge (11) of the valve body (1) by a bolt assembly. The inner wall of the valve body (1) has an annular protrusion (12) near its top end, and the upper outer side of the float support (6) has a flange (63) along the circumferential direction. The flange (63) of the float support (6) is fitted onto the annular protrusion (12). The cover plate (2) and the flange (63) together clamp the annular protrusion (12) to fix the upper end of the float support (6) to the bottom of the cover plate (2).

5. The small high-pressure resistant and corrosion-resistant exhaust valve according to claim 4, characterized in that, The exhaust pipe (3) has external threads on its outer side and is threaded to the center of the cover plate (2).

6. The small high-pressure resistant and corrosion-resistant exhaust valve according to any one of claims 2-5, characterized in that, The valve body (1) is made of 304 stainless steel. The inner wall of the valve body (1), the inner wall of the exhaust pipe (3) and the outer wall of the ejector pin (7) are all coated with polytetrafluoroethylene material. The float (5) is a hollow plastic ball, and both the float holder (6) and the float (5) are made of polytetrafluoroethylene material.

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