Sampling device for low-pressure gas of mercury-free catalyst catalysis system
By designing a sampling device that includes an exhaust pipeline, pressure reduction valve, sampling bypass, sampling valve, and needle sampling device, the problem of environmental pollution, material loss and sample pollution in low -pressure gas sampling of mercury -free catalytic catalytic catalytic systems. Achieve pollution -free and efficient sample acquisition.
Patent Information
- Application Number
- CN202420095365.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-12
- Publication Date
- 2025-01-28
- Estimated Expiration
- 2034-01-12
AI Technical Summary
The existing low-pressure gas sampling method of mercury-free catalyst catalytic system has problems such as environmental pollution, material loss, leakage risk and sample contamination.
Design a sampling device that includes the exhaust pipeline, pressure reduction valve, sampling bypass, sampling valve and needle. Through the sampling bypass and the pressure reducing valve, use a needle sampling device to extract the gas repeatedly to achieve non -polluting sample acquisition, and reduce the risk of leakage through a sealing structure.
The low -pressure gas sampling of low -pressure gas without pollution and material loss is achieved, reducing the risk of leakage and sample pollution, and improving the sampling efficiency and the accuracy of the sample.
Smart Images
Figure CN222419682U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of petrochemical processing, in particular to a sampling device for low-pressure gas in a mercury-free catalyst catalytic system. Background Art
[0002] When preparing low-pressure gas samples for mercury-free catalyst systems, the sampling port is generally discharged into the air for replacement, and a rubber bladder is used to store the low-pressure gas samples.
[0003] The disadvantages of this sampling method are: the sampling port discharges into the air, causing environmental pollution and material loss, and the sampling port valve is prone to leakage when damaged, causing safety hazards. When replacing the bladder, it is necessary to repeatedly inflate and exhaust the gas in the bladder to replace the gas in the bladder to reduce the contamination of the prepared sample. This operation process is cumbersome and may not be completely replaced and contaminate the sample. Utility Model Content
[0004] The utility model aims to provide a sampling device for low-pressure gas of a mercury-free catalyst catalytic system, which can conveniently and quickly perform pollution-free sampling of the low-pressure gas generated by the mercury-free catalyst catalytic system; and during the sampling process, there is no need to discharge gas into the air, which avoids environmental pollution and reduces material loss.
[0005] To achieve the above purpose, the utility model is implemented through the following technical solutions:
[0006] A sampling device for low-pressure gas in a mercury-free catalyst system comprises an exhaust pipeline connected to an exhaust port of a reactor and a pressure reducing valve installed on the exhaust pipeline, and also comprises a sampling bypass connected to the exhaust pipeline, the sampling bypass is connected in parallel with the pressure reducing valve, and the sampling bypass is connected with the sampling valve; one end of the sampling valve is connected with the sampling bypass, and the other end is connected with a needle sampler.
[0007] Furthermore: a sampling port is provided at one end of the sampling valve connected to the needle sampler.
[0008] Furthermore: the sampling port is sealed by a rubber sealing head. The needle sampler is inserted into the rubber sealing head for sampling, which is easy to operate and has good sealing performance, thereby reducing the risk of leakage.
[0009] Furthermore, a switch valve 1 is also provided on the sampling bypass, and the switch valve 1 is located at the connection point between the sampling valve and the sampling bypass, close to the reactor. The switch valve 1 controls the opening and closing of the sampling bypass, and closes the sampling bypass when no sampling is performed, which can reduce the risk of leakage of the sampling bypass.
[0010] Furthermore, a second switch valve is provided on the sampling bypass, and the second switch valve is located at the connection point between the sampling valve and the sampling bypass, away from the reactor. When the second switch valve and the first switch valve are closed at the same time, the sampling valve can be sealed and isolated, which is convenient for inspection and maintenance of the sampling valve.
[0011] Furthermore: the piston head of the needle sampler adopts a rubber sealing piston head.
[0012] Furthermore: the needle sampler is made of transparent material.
[0013] Furthermore, the needle sampler is provided with a scale, which can accurately measure the volume of the prepared sample.
[0014] Compared with the original technology, the utility model has the following beneficial effects:
[0015] 1. The sampling bypass is connected in series at both ends of the pressure reducing valve, so that one side of the sampling bypass is high pressure and the other side is low pressure; after opening the sampling valve, the needle sampler repeatedly draws several times to obtain a non-contaminated sample. The operation is convenient and simple, and the sampling operation efficiency is high.
[0016] 2. During the process of repeated gas extraction by the needle sampler, pure gas samples are automatically drawn into the needle sampler from the high-pressure side of the sampling bypass. After the needle sampler is full, the sampler can push back the piston of the needle sampler, and the gas will be discharged to the low-pressure side when withdrawing. The needle sampler can be replaced cleanly by repeating this process several times. After it is clean, the sample can be prepared. The gas replacement is smooth, the pollution is replaced thoroughly, and the sample obtained is highly accurate.
[0017] 3. The replacement gas pushed out by the needle sampler re-enters the exhaust pipe from the sampling bypass. During the sampling process, no gas is exhausted to the outside, which protects the environment and avoids material loss.
[0018] Fourth, the device has a simple structure and low implementation cost. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a schematic diagram of the structure of the utility model;
[0020] In the figure:
[0021] 1. Reactor; 2. Exhaust pipeline; 3. Pressure reducing valve; 4. Sampling bypass; 5. Sampling valve; 6. Needle sampler; 7. Switch valve 1; 8. Switch valve 2. DETAILED DESCRIPTION
[0022] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0023] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.
[0024] like Figure 1 Shown is a sampling device for low-pressure gas in a mercury-free catalyst system, comprising an exhaust pipeline 2 connected to the exhaust port of a reactor 1 and a pressure reducing valve 3 installed on the exhaust pipeline 2, and also comprising a sampling bypass 4 connected to the exhaust pipeline 2, wherein the sampling bypass 4 is connected in parallel with the pressure reducing valve 3, and the sampling bypass 4 is connected with a sampling valve 5; one end of the sampling valve 5 is connected with the sampling bypass 4, and the other end is connected with a needle sampler 6. A sampling port is provided at one end of the sampling valve 5 connected with the needle sampler 6, and the sampling port is sealed by a rubber sealing head. The needle sampler 6 is inserted into the rubber sealing head for sampling, which is easy to operate and has good sealing performance, thereby reducing the risk of leakage. The needle sampler 6 is made of transparent material, and a scale is provided on the needle sampler 6. The volume of the prepared sample can be accurately measured. The piston head of the needle sampler 6 adopts a rubber sealing piston head.
[0025] The sampling bypass 4 is also provided with a switch valve 1 7, which is located at the connection point of the sampling valve 5 and the sampling bypass 4 close to the reactor 1. The switch valve 1 7 controls the opening and closing of the sampling bypass 4. When the sampling bypass 4 is not sampled, the risk of leakage of the sampling bypass 4 can be reduced. The sampling bypass 4 is also provided with a switch valve 2 8, which is located at the connection point of the sampling valve 5 and the sampling bypass 4 away from the reactor 1. When the switch valve 2 8 and the switch valve 1 7 are closed at the same time, the sampling valve 5 can be closed and isolated, which is convenient for the inspection and maintenance of the sampling valve 5.
[0026] The working principle of the utility model is as follows:
[0027] On the exhaust line 2, the side of the pressure reducing valve 3 facing the reactor 1 is a high-pressure area, and the other side of the pressure reducing valve 3 is a low-pressure area. First, keep the gas after the reaction circulating to the low-pressure area through the switch valve 1 7 and the switch valve 2 8. When sampling is needed, open the sampling valve 5, insert the needle tube of the needle sampler 6 into the rubber plug, and the air pressure will push the piston of the needle sampler 6; when the needle sampler 6 is full, the sampler can push back the piston of the needle sampler 6. When the switch valve 2 8 is in the open state, compared with the switch valve 1 7 and the needle sampler 6, the switch valve 2 8 and the pipeline behind the valve are all low-pressure areas. The gas in the needle sampler 6 is discharged to the low-pressure area and discharged to the exhaust line 2, and enters the next process. The needle sampler 6 can be replaced cleanly by repeatedly extracting several times to prepare the sample.
[0028] After the sampling is completed, the sampling valve 5 is closed, and the needle sampler 6 is pulled out at the same time, and the needle port of the needle sampler 6 is covered with a cap.
[0029] When maintenance is required, the switch valve 2 8 and the switch valve 1 7 are closed at the same time, so that the sampling valve 5 can be sealed and isolated, and the sampling valve 5 can be maintained.
[0030] The above implementation is only to illustrate the technical concept and features of the utility model, and its purpose is to enable people familiar with this technology to understand the content of the utility model and implement it accordingly, and it cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the spirit of the utility model should be included in the protection scope of the utility model.
Claims
1. A sampling device for low-pressure gas in a mercury-free catalyst system, comprising an exhaust pipeline connected to the exhaust port of a reactor and a pressure reducing valve installed on the exhaust pipeline, characterized in that: It also includes a sampling bypass connected to the exhaust pipeline, the sampling bypass is connected in parallel with the pressure reducing valve, and the sampling bypass is connected with a sampling valve; one end of the sampling valve is connected with the sampling bypass, and the other end is connected with a needle sampler.
2. The low-pressure gas sampling device for a mercury-free catalyst system according to claim 1, characterized in that: A sampling port is arranged at one end of the sampling valve which is connected with the needle sampler.
3. The low-pressure gas sampling device for a mercury-free catalyst system according to claim 2, characterized in that: The sampling port is sealed by a rubber sealing head.
4. The low-pressure gas sampling device for a mercury-free catalyst system according to claim 1, characterized in that: A switch valve 1 is also arranged on the sampling bypass, and the switch valve 1 is located at the connection point between the sampling valve and the sampling bypass, close to the reactor side.
5. A sampling device for low-pressure gas in a mercury-free catalyst system according to claim 4, characterized in that: A second switch valve is also arranged on the sampling bypass, and the second switch valve is located at a side of the connection point between the sampling valve and the sampling bypass away from the reactor.
6. The low-pressure gas sampling device for a mercury-free catalyst system according to claim 1, characterized in that: The piston head of the needle sampler adopts a rubber sealing piston head.
7. The low-pressure gas sampling device for mercury-free catalyst system according to any one of claims 1 to 6, characterized in that: The needle sampler is made of transparent material.
8. The low-pressure gas sampling device for a mercury-free catalyst system according to claim 7, characterized in that: The needle sampler is provided with a scale.