Discharge system for membrane separation impermeable gas

Abstract

The utility model provides a discharge system for membrane separation impermeable gas, and aims to solve the technical problems of overlarge field noise and nitrogen waste caused by direct discharge of impermeable gas. The discharge system comprises: an output pipeline, one end of which is communicated with the output part of the membrane separation device; the emptying pipeline is arranged on the output pipeline; the emptying pressure regulating valve is arranged on the emptying pipeline; the emptying pressure sensor is arranged on the emptying pipeline, is positioned on the upstream of the emptying pressure regulating valve, and is electrically connected with the emptying pressure regulating valve; the recycling pipeline and the emptying pipeline are arranged on the output pipeline in parallel, and one end of the recycling pipeline is communicated with the impermeable gas external supply pipeline; the recycling pressure regulating valve is arranged on the recycling pipeline; and the recycling pressure sensor is arranged on the recycling pipeline, is positioned at the downstream of the recycling pressure regulating valve, and is electrically connected with the recycling pressure regulating valve. The discharging system can control noise generated when the impermeable gas is discharged, and the impermeable gas can be recycled when needed.

Description

Technical Field

[0001] The utility model relates to a treatment system for non-permeating gas, and particularly to an emission system for membrane-separated non-permeating gas. Background Art

[0002] In the polysilicon production process, the membrane separation technology is used for hydrogen recovery. During the operation of the membrane separation device, after the permeating gas enters the system, it is purified and recovered, while the non-permeating gas is directly discharged to the atmosphere through the on-site vent pipe. Since the pressure of the non-permeating gas is 1.8 MPa and the nitrogen content in the non-permeating gas is greater than 98%, direct discharge will cause excessive on-site noise and waste of high-component nitrogen. Summary of the Utility Model

[0003] Aiming at the technical problems that the direct discharge of non-permeating gas will cause excessive on-site noise and waste of nitrogen, the utility model provides an emission system for membrane-separated non-permeating gas, which has the advantages of reducing emission noise and recovering nitrogen.

[0004] The technical solution of the utility model is as follows:

[0005] An emission system for membrane-separated non-permeating gas, comprising:

[0006] An output pipe, one end of which is connected to the output part of the membrane separation device;

[0007] A vent pipe, arranged on the output pipe;

[0008] A vent pressure regulating valve, arranged on the vent pipe;

[0009] A vent pressure sensor, arranged on the vent pipe, located upstream of the vent pressure regulating valve, and electrically connected to the vent pressure regulating valve;

[0010] A reuse pipe, arranged on the output pipe in parallel with the vent pipe, and one end of which is connected to the non-permeating gas external supply pipeline;

[0011] A reuse pressure regulating valve, arranged on the reuse pipe;

[0012] A reuse pressure sensor, arranged on the reuse pipe, located downstream of the reuse pressure regulating valve, and electrically connected to the reuse pressure regulating valve.

[0013] Optionally, a pre-vent valve is arranged between the vent pressure regulating valve and the vent pressure sensor, and a post-vent valve is arranged downstream of the vent pressure regulating valve.

[0014] Optionally, it further comprises:

[0015] A first standby pipeline, both ends of which are arranged on the vent pipe;

[0016] The vent bypass valve is arranged on the first standby pipeline.

[0017] Optionally, one end of the first standby pipeline is located upstream of the vent pre-valve, and the other end is located downstream of the vent post-valve.

[0018] Optionally, regulating valve group reserved drain valves are provided both upstream and downstream of the vent pressure regulating valve.

[0019] Optionally, a vent post-valve is provided between the reuse pressure regulating valve and the reuse pressure sensor, and a vent pre-valve is provided upstream of the reuse pressure regulating valve.

[0020] Optionally, it further includes:

[0021] A second standby pipeline, with both ends arranged on the vent pipeline;

[0022] The reuse bypass valve is arranged on the second standby pipeline.

[0023] Optionally, one end of the second standby pipeline is located upstream of the reuse pre-valve, and the other end is located downstream of the reuse post-valve.

[0024] Optionally, regulating valve group reserved drain valves are provided both upstream and downstream of the reuse pressure regulating valve.

[0025] Optionally, a check valve, a manual valve, and an inlet pressure control valve are provided on the output pipeline.

[0026] Compared with the prior art, the beneficial effects of the present utility model are:

[0027] First, an output pipeline is arranged on the membrane separation device, then a vent pipeline is arranged on the output pipeline, and the pressure during venting of the vent pipeline is controlled by the vent pressure regulating valve and the vent pressure sensor, thereby controlling the volume of noise during venting.

[0028] When each device on the production line has a nitrogen usage requirement for non-open-loop operation, it is supplied with gas through the reuse pipeline, and the gas supply volume is controlled by the reuse pressure regulating valve and the reuse pressure sensor.

[0029] Through this technical solution, the noise during non-permeate gas discharge can be controlled, and the non-permeate gas can be recycled when needed. Description of the Drawings

[0030] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the accompanying drawings required for the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0031] Figure 1 It is a structural schematic diagram of the present utility model. Specific embodiments

[0032] In the following text, only some exemplary embodiments are simply described. As those skilled in the art can recognize, the described embodiments can be modified in various different ways without departing from the spirit or scope of the present utility model. Therefore, the drawings and the description are considered to be exemplary in nature rather than restrictive.

[0033] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality" means two or more, unless otherwise specifically defined.

[0034] The following disclosure provides many different embodiments or examples for implementing different structures of the present utility model. To simplify the disclosure of the present utility model, the components and settings of specific examples are described below. Of course, they are only examples and are not intended to limit the present utility model. In addition, the present utility model may repeat reference numerals and / or reference letters in different examples. Such repetition is for the purpose of simplification and clarity, and does not itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present utility model provides examples of various specific processes and materials, but those of ordinary skill in the art can be aware of the application of other processes and / or the use of other materials.

[0035] The embodiments of the present utility model will be described in detail below with reference to the accompanying drawings.

[0036] Embodiment:

[0037] See Figure 1 , this embodiment discloses a membrane separation non-permeable gas discharge system, including an output pipeline 10, a vent pipeline 20, a vent pressure regulating valve 21, a vent pressure sensor 22, a reuse pipeline 30, a reuse pressure regulating valve 31, and a reuse pressure sensor 32.

[0038] Specifically, one end of the output pipeline 10 is connected to the output part of the membrane separation device, and one end of the vent pipeline 20 communicates with the other end of the output pipeline 10. A vent pressure regulating valve 21 and a vent pressure sensor 22 are provided on the vent pipeline 20. Among them, the vent pressure sensor 22 is relatively located upstream of the vent pressure regulating valve 21 on the vent pipeline 20, and the vent pressure sensor 22 is electrically connected to the vent pressure regulating valve 21, so that the vent pressure regulating valve 21 can be controlled by the vent pressure sensor 22.

[0039] One end of the reuse pipeline 30 also communicates with the output pipeline 10 and is arranged in parallel with the vent pipeline 20. The other end of the reuse pipeline 30 is connected to the external supply pipeline of the non-permeating gas. A reuse pressure regulating valve 31 and a reuse pressure sensor 32 are provided on the reuse pipeline 30. The reuse pressure sensor 32 is relatively located downstream of the reuse pressure regulating valve 31 on the reuse pipeline 30, and the reuse pressure sensor 32 is electrically connected to the reuse pressure regulating valve 31, so that the reuse pressure sensor 32 can directly control the reuse pressure regulating valve 31.

[0040] The working principle of this embodiment is to control the pressure during the venting of the vent pipeline 20 through the vent pressure regulating valve 21 and the vent pressure sensor 22, so as to control the volume of the noise during venting.

[0041] In addition, when each device on the production line has a nitrogen usage requirement for non-open-loop operation, the reuse pipeline 30 supplies gas to it, and the gas supply volume is controlled through the reuse pressure regulating valve 31 and the reuse pressure sensor 32.

[0042] Through this embodiment, the noise during the discharge of the non-permeating gas can be controlled, and the non-permeating gas can be recycled when needed.

[0043] In one specific embodiment:

[0044] A pre - venting - air - release manual valve 23 is provided between the venting pressure regulating valve 21 and the venting pressure sensor 22, and a post - venting manual valve is provided downstream of the venting pressure regulating valve 21. By providing the pre - venting - air - release manual valve 23 and the post - venting manual valve respectively upstream and downstream of the venting pressure regulating valve 21, the purpose is to facilitate the evacuation of non - permeating gas in the venting pipeline 20. It is applicable to the situation where the venting pressure is not high and the first control valve 21 and the first pressure sensor 22 are not required to regulate the venting pressure. Preferably, a first reserve pipeline 25 is also provided on the venting pipeline 20, and a regulating valve bypass valve 26 is further provided on the first reserve pipeline 25. Both ends of the first reserve pipeline 25 are connected to the venting pipeline 20. At the same time, one end of the first reserve pipeline 25 is located between the venting pressure regulating valve 21 and the venting pressure sensor 22, and this end of the first reserve pipeline 25 is also upstream of the pre - venting - air - release manual valve 23, and the other end of the first reserve pipeline 25 is downstream of the post - venting manual valve.

[0045] In this embodiment, by providing the first reserve pipeline 25 and the regulating valve bypass valve 26, it is for emergency use in case the first valve group 24 fails.

[0046] In another specific embodiment:

[0047] A post - reuse manual valve 33 is provided between the reuse pressure regulating valve 31 and the reuse pressure sensor 32, and a pre - reuse manual valve is provided upstream of the reuse pressure regulating valve 31. The purpose of setting the post - reuse manual valve 33 and the pre - reuse manual valve is the same as that of setting the pre - venting - air - release manual valve 23 and the post - venting manual valve, the difference being that the post - reuse manual valve 33 and the pre - reuse manual valve are used to evacuate the reuse pipeline 30. It is applicable to the situation where the pressure of the reused non - permeating gas is not high and the second control valve, the reuse pressure regulating valve 31 and the second pressure sensor, the reuse pressure sensor 32 are not required to regulate the pressure of the reused non - permeating gas.

[0048] Preferably, a second reserve pipeline 35 is also provided on the reuse pipeline 30, and a reuse bypass valve 36 is further provided on the second reserve pipeline 35. Both ends of the second reserve pipeline 35 are connected to the reuse pipeline 30. At the same time, one end of the second reserve pipeline 35 is located between the reuse pressure regulating valve 31 and the reuse pressure sensor 32, and this end of the second reserve pipeline 35 is also downstream of the post - reuse manual valve 33, and the other end of the second reserve pipeline 35 is upstream of the pre - reuse manual valve.

[0049] In this embodiment, by providing the second reserve pipeline 35 and the reuse bypass valve 36, it is for emergency use in case the pre - reuse manual valve and the post - reuse manual valve 33 fail.

[0050] In another specific embodiment:

[0051] An inlet pressure control valve 11 is provided on the output pipeline 10. By setting the inlet pressure control valve 11, the pressure of the non-permeable gas in the discharge pipeline can be directly controlled. A check valve 12 is provided on the output pipeline 10. By setting the check valve 12, the reverse flow of the non-permeable gas is avoided. A manual valve 13 is provided on the output pipeline 10. By setting the manual valve 13, a basic guarantee for the safety of pipeline transportation is provided.

[0052] In another specific embodiment:

[0053] Regulating valve group reserved drains are provided both upstream and downstream of the venting pressure regulating valve. Regulating valve group reserved drains are also provided both upstream and downstream of the reuse pressure regulating valve.

[0054] The above-described embodiments only represent the specific implementation manners of the present utility model. The description is relatively specific and detailed, but it should not be construed as a limitation to the patent scope of the present utility model. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present utility model, several modifications and improvements can still be made, and these all belong to the protection scope of the present utility model.

Claims

1. A membrane separation non-permeable gas discharge system, characterized in that, Including: An output pipeline, with one end connected to the output part of the membrane separation device; A venting pipeline, provided on the output pipeline; A venting pressure regulating valve, provided on the venting pipeline; A venting pressure sensor, provided on the venting pipeline, located upstream of the venting pressure regulating valve, and electrically connected to the venting pressure regulating valve at the same time; A recycling pipeline, provided on the output pipeline in parallel with the venting pipeline, with one end connected to the non-permeate gas external supply pipeline; A recycling pressure regulating valve, provided on the recycling pipeline; A recycling pressure sensor, provided on the recycling pipeline, located downstream of the recycling pressure regulating valve, and electrically connected to the recycling pressure regulating valve at the same time.

2. The membrane separation non-permeable gas discharge system according to claim 1, characterized in that, A pre-venting hand valve is provided between the venting pressure regulating valve and the venting pressure sensor, and a post-venting hand valve is provided downstream of the venting pressure regulating valve.

3. The membrane separation non-permeable gas discharge system according to claim 2, wherein It further includes: A first standby pipeline, with both ends provided on the venting pipeline; A venting bypass valve, provided on the first standby pipeline.

4. The membrane separation non-permeable gas discharge system according to claim 3, characterized in that, One end of the first standby pipeline is located upstream of the pre-venting hand valve, and the other end is located downstream of the post-venting hand valve.

5. The membrane separation non-permeable gas discharge system according to any one of claims 1-4, characterized in that, Regulating valve group reserved drips are provided both upstream and downstream of the venting pressure regulating valve.

6. The emission system for non-permeating gas by membrane separation according to claim 1, characterized in that, A post-recycling hand valve is provided between the recycling pressure regulating valve and the recycling pressure sensor, and a pre-recycling hand valve is provided upstream of the recycling pressure regulating valve.

7. The membrane separation non-permeable gas discharge system according to claim 6, characterized in that, It further includes: A second standby pipeline, with both ends provided on the venting pipeline; A recycling bypass valve, provided on the second standby pipeline.

8. The emission system for non-permeable gas by membrane separation according to claim 7, characterized in that, One end of the second standby pipeline is located upstream of the pre-recycling hand valve, and the other end is located downstream of the post-recycling hand valve.

9. The membrane separation non-permeable gas discharge system according to any one of claims 1, 6, 7, and 8, characterized in that, Regulating valve group reserved drips are provided both upstream and downstream of the recycling pressure regulating valve.

10. The membrane separation non-permeable gas discharge system according to claim 1, characterized in that A check valve, a manual valve and an inlet pressure control valve are provided on the output pipeline.

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