A chlorosilane slag sampling system in a cold hydrogenation production process

Abstract

This invention proposes a chlorosilane slag sampling system for a cold hydrogenation production process, comprising a stripping tower (1) in the cold hydrogenation production process, a slag discharge pipeline (11) at the bottom of the stripping tower (1), a slag discharge valve (12) on the slag discharge pipeline (11), and the slag sampling system connected in parallel with the slag discharge valve (12) on the slag discharge pipeline (11). This invention can increase the material circulation time, reduce the sampling temperature and pressure, avoid valve jamming and material leakage caused by excessive pressure and temperature, thereby improving safety and work efficiency, and also preventing material from contacting personnel and air.

Description

Technical Field

[0001] This utility model relates to a slag discharge sampling system, and more particularly to a chlorosilane slag discharge sampling system in a cold hydrogenation production process. Background Technology

[0002] This section provides only background information relevant to this disclosure and is not necessarily prior art.

[0003] In existing technologies, sampling of slag discharge from the stripping tower of a hydrogenation unit, such as... Figure 1 As shown, the slag discharge pipe opens from the side and is connected using pipes and flanges, with the sampling port elbow facing downwards. During slag discharge sampling, the side connecting pipe remains open, and the sample is discharged and taken from the sampling port elbow.

[0004] Currently, the stripping tower is operating at a temperature of 130℃ and a pressure of 2.8 MPa at the bottom. Sampling is performed through the slag discharge pipe at the bottom of the tower. The material needs to be circulated during sampling. Due to the influence of material temperature, pressure, and silica powder solid content, the sampling valve becomes stuck, causing material leakage during sampling, which increases safety risks and reduces work efficiency.

[0005] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0006] Purpose of the invention: The technical problem to be solved by this utility model is to provide a chlorosilane slag sampling system in a cold hydrogenation production process, addressing the shortcomings of existing technologies.

[0007] To solve the above-mentioned technical problems, this utility model discloses a chlorosilane slag sampling system in a cold hydrogenation production process, comprising a stripping tower in the cold hydrogenation production process, a slag discharge pipeline at the bottom of the stripping tower, a slag discharge valve on the slag discharge pipeline, and a slag sampling system connected in parallel with the slag discharge valve on the slag discharge pipeline. The slag sampling system includes:

[0008] The inlet pipe and outlet pipe are provided at both ends of the slag discharge valve and are fluidly connected to the slag discharge pipeline;

[0009] The other end of the inlet pipe is fluidly connected to the inlet of the sampling circulation buffer tank, and the other end of the outlet pipe is fluidly connected to the outlet of the sampling circulation buffer tank.

[0010] The bottom of the sampling circulation buffer tank is provided with a circulation pipe that is fluidly connected to the outlet pipe. A three-way valve is provided on the circulation pipe, and the third port of the three-way valve is fluidly connected to the sampling bottle assembly used for sampling.

[0011] Furthermore, the inlet pipe is equipped with an inlet pipe valve, and the outlet pipe is equipped with an outlet pipe valve.

[0012] Furthermore, the inlet pipe is fluidly connected to the feed port of the sampling circulation buffer tank via the inlet pipe valve; the discharge port of the sampling circulation buffer tank is fluidly connected to the outlet pipe via the discharge port valve.

[0013] Furthermore, the sampling bottle assembly includes:

[0014] The third connection of the three-way valve is a double-needle connector, which is located at the mouth of the sampling bottle by piercing the gasket with a sampling needle.

[0015] The dual-needle connector is equipped with a sampling needle and an exhaust needle; wherein, the sampling needle is connected to the third channel of the three-way valve, and the exhaust needle is connected to the absorption tank.

[0016] Furthermore, the sampling bottle is equipped with a protective cover.

[0017] Furthermore, a nitrogen purging device is provided between the three-way valve and the double-needle connector.

[0018] Furthermore, the nitrogen purging device includes:

[0019] A nitrogen purging valve is connected to an externally input purge nitrogen fluid, and the other end of the nitrogen purging valve is connected to the sampling needle via a nitrogen purging pipe.

[0020] Furthermore, the inlet and outlet of the sampling circulation buffer tank are connected by a variable diameter connection.

[0021] Furthermore, the sampling circulation buffer tank is equipped with a buffer tank pressure gauge for monitoring the pressure inside the tank.

[0022] Furthermore, the nitrogen purging device is equipped with a nitrogen purging pressure gauge to monitor the pressure of the purging nitrogen.

[0023] Beneficial effects:

[0024] 1. The cyclic sampling system added in this utility model can increase the material circulation time, reduce the sampling temperature to 90℃, and reduce the sampling pressure to 0.5Mpa. This can avoid valve jamming and material leakage caused by excessive pressure and temperature, thereby improving safety and work efficiency.

[0025] 2. In this utility model, the sampling circulation outlet and bottom circulation pipe prevent insufficient circulation of the sampled material. Considering the properties of the material, a three-way valve is installed in the bottom circulation pipe and a detachable double needle connector is installed. PFA sampling bottles are used. The exhaust gas is absorbed by the activated carbon absorption tank and then discharged. A nitrogen purge pipe is installed at the sampling port to avoid contact between the material and personnel and air. Attached Figure Description

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, and the advantages of the present invention in the above and / or other aspects will become clearer.

[0027] Figure 1 This is a schematic diagram of the sampling system structure in the existing technology.

[0028] Figure 2 This is a schematic diagram of the overall structure of the sampling system proposed in this utility model.

[0029] Figure 3 This is a schematic diagram of the sampling bottle assembly structure.

[0030] In the diagram, 1 is the stripping tower, 11 is the slag discharge pipeline, 12 is the slag discharge valve, 2 is the inlet pipe, 21 is the inlet pipe valve, 3 is the outlet pipe, 31 is the outlet pipe valve, 4 is the sampling circulation buffer tank, 41 is the feed inlet, 42 is the discharge outlet, 421 is the discharge outlet valve, 43 is the circulation pipeline, 44 is the buffer tank pressure gauge, 5 is the three-way valve, 6 is the sampling bottle assembly, 61 is the sampling bottle, 62 is the sampling needle puncture gasket, 63 is the double needle connector, 64 is the protective cover, 65 is the absorption tank, 66 is the nitrogen purging valve, and 67 is the nitrogen purging pressure gauge. Detailed Implementation

[0031] This application proposes a chlorosilane slag sampling system for a cold hydrogenation production process. This system reduces material temperature and pressure, and increases the circulation device, thereby improving sampling safety and efficiency. Specific technical solutions are as follows: Figure 2 As shown:

[0032] In the cold hydrogenation production process, the bottom of the stripping tower 1 of the hydrogenation unit is equipped with a slag discharge pipeline 11 for slag discharge, and a slag discharge valve 12 is installed on the slag discharge pipeline 11.

[0033] The slag sampling system and the slag discharge valve 12 are connected in parallel to the slag discharge pipeline 11, including the inlet pipe 2 and the outlet pipe 3.

[0034] An inlet valve 21 is provided on the inlet pipe 2, and an outlet valve 31 is provided on the outlet pipe 3.

[0035] The inlet pipe 2 is fluidly connected to the inlet 41 of the sampling circulation buffer tank 4 through the inlet pipe valve 21, and the outlet 42 of the sampling circulation buffer tank 4 is fluidly connected to the outlet pipe 3 through the outlet valve 421.

[0036] The inlet 41 and outlet 42 of the sampling circulation buffer tank 4 can be connected by a variable diameter connection.

[0037] A pressure gauge 44 can also be installed on the sampling circulation buffer tank 4 to monitor the pressure inside the tank.

[0038] The bottom of the sampling circulation buffer tank 4 is provided with a circulation pipe 43 which is fluidly connected to the outlet pipe 3. A three-way valve 5 is provided on the circulation pipe 43, and the third channel of the three-way valve 5 is fluidly connected to the sampling bottle assembly 6.

[0039] like Figure 3 As shown, the sampling bottle assembly 6 includes:

[0040] A double-needle connector 63 is connected to the third port of the three-way valve 5. The double-needle connector 63 is located at the mouth of the sampling bottle 61 by piercing the gasket 62 with a sampling needle. The double-needle connector 63 is equipped with a sampling needle and an exhaust needle. The sampling needle is connected to the third port of the three-way valve 5, and the exhaust needle is connected to the absorption tank 65.

[0041] The sampling bottle 61 is equipped with a protective cover 64.

[0042] A nitrogen purging device is also provided between the three-way valve 5 and the double-needle connector 63.

[0043] The nitrogen purging device includes a nitrogen purging valve 66 that is fluidly connected to externally input purging nitrogen, and the other end of the nitrogen purging valve 66 is fluidly connected to a sampling needle through a nitrogen purging pipe.

[0044] The nitrogen purging device is also equipped with a nitrogen purging pressure gauge 67 to monitor the pressure of the purging nitrogen.

[0045] In use, a sampler is first installed at a certain distance on the bottom slag discharge pipeline 11 of the stripping tower 1. The sampler has an inlet pipe 2 and an outlet pipe 3 before and after it. A sampling circulation buffer tank 4 is set up. The inlet and outlet of the sampling circulation buffer tank 4 are connected by a reducing diameter (e.g., 50 to 25). A pressure gauge 44 is installed to monitor the pressure. The material is fed from the bottom inlet 41 and discharged from the top outlet 42. A circulation pipeline 43 is installed at the bottom to the outlet pipe 3. A three-way valve 5 is installed on the circulation pipeline 43. The third channel of the three-way valve 5 is connected to the sampling bottle assembly 6.

[0046] In the sampling bottle assembly 6, a detachable double-needle connector 63 is installed, a PFA sampling bottle 61 is used, the exhaust gas is absorbed by the activated carbon absorption tank 65 and then discharged, and the sampling port is equipped with nitrogen purging.

[0047] Before using the sampler, open valves 21, 421, and 31. The medium flows through the buffer tank 4, ensuring continuous material circulation. The three-way valve 5 is opened to the circulation state, i.e., the circulation pipe 43 is open, ensuring the representativeness and freshness of the sample. At the start of sampling, the sampling bottle 61 with the gasket 62 is installed inside the corresponding protective cover 64, allowing the sampling needle and exhaust needle to pierce the gasket. Then, slowly open the third passage of the three-way valve 5 to allow the sample to enter the sampling bottle 61. Once the desired sample volume is reached, close the three-way valve 5 and valves 21, 421, and 31.

[0048] Then open nitrogen purging valve 66 and purge the sampling needle with nitrogen for one minute to completely purge any residual substances from the bottle and the pipeline between the sampling valve and the sampling bottle. This prevents any residual substances in the pipeline and sampling needle from coming into contact with air and personnel after the sampling bottle is removed.

[0049] Close the nitrogen purge valve 66, separate the sampling bottle 61 from the sampling system, rinse the buffer tank 4 with clean material, and close the sampling device valves 21 and 31 to end the sampling process.

[0050] The circulating sampling system proposed in this application can increase the material circulation time, reduce the sampling temperature to 90℃, and reduce the sampling pressure to 0.5 MPa. This avoids valve jamming and material leakage caused by excessive pressure and temperature, thereby improving safety and work efficiency.

[0051] In this application, a sampling circulation outlet and a bottom circulation pipeline are used to prevent insufficient circulation of the sampled material. Considering the properties of the material, a three-way valve is installed in the bottom circulation pipeline, a detachable double-needle connector is installed, a PFA sampling bottle is used, and the exhaust gas is absorbed by an activated carbon absorption tank before being discharged. A nitrogen purge pipe is installed at the sampling port to prevent the material from coming into contact with personnel and air.

[0052] This invention provides a concept and method for a chlorosilane slag sampling system in a cold hydrogenation production process. Many methods and approaches exist for implementing this technical solution; the above description is merely a preferred embodiment. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this invention, and these improvements and modifications should also be considered within the scope of protection of this invention. All components not explicitly stated in this embodiment can be implemented using existing technology.

Claims

1. A chlorosilane slag sampling system for a cold hydrogenation production process, comprising: a stripping tower (1) in the cold hydrogenation production process; a slag discharge pipeline (11) for slag discharge at the bottom of the stripping tower (1); a slag discharge valve (12) on the slag discharge pipeline (11); and the slag sampling system being connected in parallel with the slag discharge valve (12) on the slag discharge pipeline (11), characterized in that: The slag discharge sampling system includes: An inlet pipe (2) and an outlet pipe (3) are provided at both ends of the slag discharge valve (12) and are fluidly connected to the slag discharge pipeline (11); The other end of the inlet pipe (2) is fluidly connected to the inlet (41) of the sampling circulation buffer tank (4), and the other end of the outlet pipe (3) is fluidly connected to the outlet (42) of the sampling circulation buffer tank (4). The bottom of the sampling circulation buffer tank (4) is provided with a circulation pipe (43) which is fluidly connected to the outlet pipe (3). A three-way valve (5) is provided on the circulation pipe (43), and the third path of the three-way valve (5) is fluidly connected to the sampling bottle assembly (6) used for sampling.

2. The chlorosilane residue sampling system in a cold hydrogenation production process according to claim 1, characterized in that, The inlet pipe (2) is equipped with an inlet pipe valve (21), and the outlet pipe (3) is equipped with an outlet pipe valve (31).

3. A chlorosilane purge sampling system in a cold hydrogenation production process according to claim 2, wherein, The inlet pipe (2) is fluidly connected to the inlet (41) of the sampling circulation buffer tank (4) through the inlet pipe valve (21); the outlet (42) of the sampling circulation buffer tank (4) is fluidly connected to the outlet pipe (3) through the outlet valve (421).

4. The chlorosilane residue sampling system in a cold hydrogenation production process according to claim 3, characterized in that, The sampling bottle assembly (6) includes: The third path of the three-way valve (5) is connected to a double-needle connector (63), which is located at the mouth of the sampling bottle (61) by piercing the gasket (62) with a sampling needle. The double-needle connector (63) is provided with a sampling needle and an exhaust needle; wherein the sampling needle is connected to the third channel of the three-way valve (5), and the exhaust needle is connected to the absorption tank (65).

5. The chlorosilane slag sampling system in a cold hydrogenation production process according to claim 4, characterized in that, The sampling bottle (61) is provided with a protective cover (64).

6. A chlorosilane purge sampling system in a cold hydrogenation production process according to claim 5, wherein, A nitrogen purging device is also provided between the three-way valve (5) and the double-needle connector (63).

7. A chlorosilane purge sampling system in a cold hydrogenation production process according to claim 6, wherein, The nitrogen purging device includes: A nitrogen purging valve (66) is connected to an externally input purging nitrogen fluid, and the other end of the nitrogen purging valve (66) is connected to the sampling needle via a nitrogen purging pipe.

8. The chlorosilane purge sampling system in a cold hydrogenation production process according to claim 7, wherein, The inlet (41) and outlet (42) of the sampling circulation buffer tank (4) are connected by a variable diameter connection.

9. A chlorosilane purge sampling system in a cold hydrogenation production process according to claim 8, wherein, The sampling circulation buffer tank (4) is equipped with a buffer tank pressure gauge (44) for monitoring the pressure inside the tank.

10. A chlorosilane purge sampling system in a cold hydrogenation production process according to claim 9, wherein, The nitrogen purging device is equipped with a nitrogen purging pressure gauge (67) for monitoring the pressure of the purging nitrogen.

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