Method and piping system for bypassing water and fine particulate matter removal

Abstract

The application discloses a bypass water vapor and fine particulate matter removing method and pipeline system, and relates to the technical field of pipeline network purification. The application is used to solve the problem that adding a filter device on the main pipeline increases the operation resistance of the pipeline system. The application comprises the following steps: cutting off a section of normally-operated pipeline, connecting a tee joint at two exposed end heads, connecting a connecting pipe provided with a valve one between one end of the two tee joints, and connecting a filter pipeline provided with a valve two between the other end of the two tee joints. In the initial stage of system operation and after pipeline dew point blowing, the valve two is opened first, and then the valve one is closed, so that the airflow flows through the filter pipeline to remove water vapor and fine particulate matter. When filtration is not needed, the valve one is opened first, and then the valve two is closed, so that the airflow directly flows through the connecting pipe. The application is easy to realize on the basis of the original pipeline network system, has low cost, can remove water vapor and fine particulate matter from the pipeline network, and will not increase the operation resistance of the system.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pipe network purification, in particular to a bypass water and fine particle removal method and pipe system. BACKGROUND

[0002] In air separation or liquefaction projects, the product medium is oxygen, nitrogen, argon or liquid oxygen, liquid nitrogen or liquid argon. The entire process system has high requirements for the dew point and purity of the medium in the pipeline. In order to meet the process requirements, liquid and oxygen pipelines generally use stainless steel pipelines. For oxygen pipelines made of carbon steel, strict rust removal, degreasing and passivation are carried out. However, in the entire air separation or liquefaction engineering system, there are many pipe networks, and in order to reduce engineering costs, it is inevitable to use some pipelines that do not undergo rust removal, degreasing and passivation. In addition, in order to meet the dew point requirements of the medium in the pipeline, the entire pipe network will be blown to the dew point before the air separation or liquefaction project is started. However, the entire pipe network is complex and there are some blind spots, so it is difficult to blow out the water vapor completely. Although the addition of a filtering device on the main pipeline can effectively remove water vapor and fine particles, it will increase the operating resistance of the pipeline system. Therefore, a bypass water and fine particle removal method and pipeline system are needed to solve this problem. SUMMARY

[0003] The purpose of the present application is to provide a bypass water and fine particle removal method and pipeline system to solve the problem of increased operating resistance of the pipeline system caused by the addition of a filtering device on the main pipeline.

[0004] To achieve the above purpose, the present application provides the following technical solution: a bypass water and fine particle removal method, comprising the following specific contents: a section of normally operating pipeline is cut off, and a tee joint is connected at both exposed end heads. A connecting pipe provided with valve one is connected between one end of the two tee joints, and a filtering pipeline provided with valve two is connected between the other end of the two tee joints; at the initial stage of system operation and after the pipe network is blown to the dew point, valve two is first opened and then valve one is closed, so that the gas flow passes through the filtering pipeline for water vapor and fine particle removal; when filtration is not required, valve one is first opened and then valve two is closed, so that the gas flow directly passes through the connecting pipe.

[0005] Preferably, during system operation, the water vapor and fine particles in the pipeline are monitored online. When the content of any of them exceeds the standard, valve two is first opened and then valve one is closed, so that the gas flow passes through the filtering pipeline for water vapor and fine particle removal.

[0006] The application provides another technical scheme: a bypass water vapor and fine particulate matter removal method and pipeline system.

[0007] Preferably, the water vapor and fine particulate matter removal device is tubular, and an adsorption material is fixedly arranged on the inner wall of the water vapor and fine particulate matter removal device.

[0008] Preferably, the water vapor and fine particulate matter removal device is sleeved with a magnetic ring on the outside.

[0009] Preferably, the water vapor and fine particulate matter removal device is arranged in parallel with the normal operation pipeline, and the two filters are not parallel to the water vapor and fine particulate matter removal device; and the water vapor and fine particulate matter removal device is provided with cleaning ports at both ends.

[0010] Preferably, the filter is tubular, and is internally provided with a filter screen.

[0011] Preferably, the valve one is a butterfly valve.

[0012] Preferably, the valve two is a blind plate valve.

[0013] Compared with the prior art, the application has the following beneficial effects:

[0014] The bypass water vapor and fine particulate matter removal method and pipeline system are easy to realize and low in cost on the basis of the original pipeline network system, and can freely control when to remove water vapor and fine particulate matter; when no filtering is needed, the airflow can directly flow through the normal operation pipeline, and the system long-time running resistance is not increased. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 The figure is a structural schematic view of the pipeline system of the application.

[0016] In the figure: 1, normal operation pipeline; 2, valve one; 3, flange; 4, filter; 5, valve two; 6, water vapor and fine particulate matter removal device. DETAILED DESCRIPTION

[0017] Through the running process simulation and actual sampling analysis, it is found that the fine particles in the pipe network are more concentrated in the initial stage of system operation, which may be related to the reasons such as long time settlement, pipe is impacted by initial turbulence, etc., in addition, the blowout point is just before the air separation or liquefaction project starts; based on this assumption, the applicant proposes the following bypass water vapor and fine particle removal method and pipeline system, as shown in Figure 1 The normal operation pipeline 1 is connected with a valve one 2, and the flanges 3 are connected with a group of filters 4 through three-way bypasses at the inlet and outlet ends of the valve one 2, respectively, and the valve two 5 is further connected between the flanges 3 and the filters 4, and the water vapor and fine particle removal device 6 is connected between the ends of the two filters 4 away from the flanges 3; the valve one 2 can adopt a butterfly valve, the valve two 5 can adopt a blind valve, or a plate valve, etc., preferably an electric control valve, of course, in order to ensure the safety and stability of the pipeline system, a standby manual valve can also be connected in bypass at both ends of the valve one 2 according to the production principle of one standby one, which is also convenient for maintenance and replacement of the valve.

[0018] In a more preferred embodiment, the water vapor and fine particle removal device 6 is tubular, and the inner wall is fixed with adsorbent material, such as activated carbon fixed with air-permeable mesh, for adsorbing water vapor and fine particles; the outer side of the water vapor and fine particle removal device 6 can be further sleeved with a magnetic ring for guiding the movement of ferromagnetic particle substances in the airflow to the adsorbent material of the pipe wall.

[0019] Referring to Figure 1 , the water vapor and fine particle removal device 6 is preferably arranged in parallel with the normal operation pipeline 1, and the two filters 4 are not parallel with the water vapor and fine particle removal device 6, for example, perpendicular; the two ends of the water vapor and fine particle removal device 6 are provided with cleaning ports for periodically opening and cleaning the impurities inside, or replacing the new adsorbent material.

[0020] Optionally, the filter 4 is tubular and provided with a filter screen inside, which can specifically adopt common devices such as conical filter, etc., and the outlet filter screen can adopt multi-layer high-precision filter screen to increase the filtering capacity.

[0021] The use method of the bypass water vapor and fine particle removal method and pipeline system is as follows: at the initial stage of system operation, after the blowout point of the pipe network, first open the two valve twos 5, and then close the valve one 2, and the airflow passes through the two filters 4 and the water vapor and fine particle removal device 6; after the system runs for a period of time, first open the valve one 2, and then close the two valve twos 5, and the airflow directly passes through the valve one 2 on the normal operation pipeline 1; in this way, the adsorption and filtration of water vapor and fine particles can be carried out at the initial stage, and through experimental verification, it is proved that the problem of filtration and system operation resistance can be effectively solved at the same time; of course, online monitoring can also be used to determine whether bypass water vapor and fine particle removal is needed during operation.

[0022] The above merely provides the preferred embodiments of the present application, but the protection scope of the present application is not limited thereto, and any person skilled in the art can easily think of the changes or replacements within the technical scope disclosed by the present application, which should be covered within the protection scope of the present application. Therefore, the protection scope of the present application should be defined by the protection scope of the claims.

[0023] The part not described in the present application is the known technology of the person skilled in the art.

Claims

1. A method of bypassing water vapor and fine particulate removal, characterized by, The application relates to a normal operation pipeline device, which comprises the following specific contents: a section of a normal operation pipeline is cut off, three branches are connected at two exposed end heads, a connecting pipe provided with valve one is connected between the one ends of the two three branches, and a filtering pipeline provided with valve two is connected between the other ends of the two three branches; at the initial stage of system operation and after pipeline blow-off, valve two is opened first, then valve one is closed, gas flow is filtered through the filtering pipeline to remove water vapor and fine particles; when filtering is not needed, valve one is opened first, then valve two is closed, and the gas flow directly flows through the connecting pipe.

2. The method of claim 1, wherein: During system operation, water vapor and fine particles in the pipeline are monitored online, when any one of the contents exceeds the standard, valve two is opened first, then valve one is closed, so that the gas flow is filtered through the filtering pipeline to remove water vapor and fine particles.

3. A pipe system for the implementation of the method according to claim 1 or 2 for bypass water knockout and gas knockout of fine particles, comprising a normal operation pipe (1), characterized in that: The normal operation pipeline (1) is connected with valve one (2), flanges (3) are connected at the gas inlet end and the gas outlet end of the normal operation pipeline (1) through three branch bypasses, a group of filters (4) are connected at the two flanges (3) respectively, valve two (5) is further connected between the flanges (3) and the filters (4), and water vapor and fine particle removing devices (6) are connected between the one ends of the two filters (4) away from the flanges (3).

4. A pipe system for bypassing water and fine particulate matter from a gas according to claim 3, characterized in that: The water vapor and fine particle removing device (6) is tubular, and the inner wall is fixed with adsorbing materials.

5. A bypass dewatering air de- particulate matter line system according to claim 4, wherein: A magnetic ring is arranged outside the water vapor and fine particle removing device (6).

6. A bypass dewatering air de- particulate matter line system according to claim 4, wherein: The water vapor and fine particle removing device (6) is arranged in parallel with the normal operation pipeline (1), the two filters (4) are not parallel with the water vapor and fine particle removing device (6), and cleaning ports are arranged at the two ends of the water vapor and fine particle removing device (6).

7. A bypass dewatering air de- particulate matter line system according to claim 3, wherein: The filter (4) is tubular, and is internally provided with a filter screen.

8. A bypass dewatering air de- particulate matter line system according to claim 3, wherein: The valve one (2) is a butterfly valve.

9. A bypass dewatering air de- particulate matter line system according to claim 3, wherein: The valve two (5) is a blind plate valve.

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