CN214408154U - Online liquid phase sampling system of high-pressure chemical device - Google Patents
Online liquid phase sampling system of high-pressure chemical device Download PDFInfo
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- CN214408154U CN214408154U CN202022946594.9U CN202022946594U CN214408154U CN 214408154 U CN214408154 U CN 214408154U CN 202022946594 U CN202022946594 U CN 202022946594U CN 214408154 U CN214408154 U CN 214408154U
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Abstract
The utility model relates to an online liquid phase sampling system of high pressure chemical plant belongs to chemical industry check out test set technical field. Comprises a sampling pipeline, a sampling tank, a sample discharge pipeline, a gas inlet and outlet pipeline, a pressure compensation gas pipeline and a vent pipeline; the sampling pipeline is connected with the sample discharge pipeline through a sampling tank, and a gas inlet and outlet pipeline is arranged on the sampling tank; the gas inlet and outlet pipeline is connected with the pressure compensation gas pipeline and the emptying pipeline through a three-way joint. The utility model can collect fresh samples in real time for high temperature and high pressure systems, has no disturbance to the pressure of the main system in the sampling process, has no leakage in sealing, can be widely applied to online sampling of toxic, inflammable and explosive materials at the outlet of a high temperature and high pressure reactor, and can monitor the technical indexes such as reaction conversion rate, selectivity and the like in real time; the utility model discloses easy and simple to handle, low cost, safety ring guarantor.
Description
Technical Field
The utility model relates to an online liquid phase sampling system of high pressure chemical plant belongs to chemical industry check out test set technical field.
Background
Chemical reaction devices often need to detect technical indexes such as selectivity, conversion rate and the like of reaction in real time, and a simple and efficient method is provided for collecting fresh samples at the outlet of a reactor and carrying out off-line analysis in time. Chemical reaction devices are often in a high-temperature and high-pressure state, materials in the reactors are high in toxicity, flammable and explosive, the conventional double-valve sampling adopted in the prior art has extremely high requirements on the proficiency of operators, and safety risks and even accidents are caused if the conventional double-valve sampling is careless.
Disclosure of Invention
The utility model aims at solving the technical problem of how to safely and reliably collect fresh samples in real time for high-temperature and high-pressure chemical reaction devices.
In order to solve the above problems, the technical solution adopted by the present invention is to provide an on-line liquid phase sampling system of a high pressure chemical plant; comprises a sampling pipeline, a sampling tank, a sample discharge pipeline, a gas inlet and outlet pipeline, a pressure compensation gas pipeline and a vent pipeline; the sampling pipeline is connected with the sample discharge pipeline through a sampling tank, and a gas inlet and outlet pipeline is arranged on the sampling tank; the gas inlet and outlet pipeline is connected with the pressure compensation gas pipeline and the emptying pipeline through a second three-way joint.
Preferably, a sampling feeding cut-off valve is arranged between the sampling pipeline and the sampling tank.
Preferably, a double cut-off valve for high and low pressure isolation is arranged on the sample discharge pipeline.
Preferably, an adjustable and shut-off valve is arranged on the emptying pipeline.
Preferably, a shutoff ball valve and a one-way valve are arranged on the pressure compensation gas pipeline.
Preferably, a valve for adjusting the flow rate of the gas and a pressure gauge for observing the pressure are arranged on the gas inlet and outlet pipeline.
Preferably, the sampling pipeline is connected with the sampling tank through a first tee joint, and the first tee joint is further connected with a gas inlet and outlet pipeline.
Preferably, the sampling pipeline, the sampling tank, the sample discharge pipeline, the gas inlet and outlet pipeline, the pressure compensation gas pipeline or the emptying pipeline are provided with electric heating devices at the periphery.
Compared with the prior art, the utility model discloses following beneficial effect has:
the utility model provides an online liquid phase sampling system of high pressure chemical plant can gather fresh sample to high temperature, high-pressure system in real time, and the sampling process is to main system pressure undisturbed, and is sealed not have and leaks, can extensively be used for the online sampling of high temperature high pressure reactor export poisonous, flammable, explosive material, technical index such as real-time supervision reaction conversion rate, selectivity, easy and simple to handle, low cost, safety ring protects.
Drawings
FIG. 1 is a schematic view of the structure of the present invention;
Detailed Description
In order to make the present invention more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings:
as shown in fig. 1, the utility model provides an on-line liquid phase sampling system of a high pressure chemical device; comprises a sampling pipeline 1-1, a sampling tank 3-1, a sample discharge pipeline 1-3, a gas inlet and outlet pipeline 2-4, a pressure compensation gas pipeline 2-6 and an emptying pipeline 2-5; the sampling pipeline 1-1 is connected with the sample discharge pipeline 1-3 through the sampling tank 3-1, and the sampling tank 3-1 is provided with a gas inlet and outlet pipeline 2-4; the gas inlet and outlet pipeline 2-4 is connected with the pressure compensation gas pipeline 2-6 and the emptying pipeline 2-5 through a tee joint II 1-9. A sampling feeding cut-off valve 2-1 is arranged between the sampling pipeline 1-1 and the sampling tank 3-1. A double-cut-off valve for high-low pressure isolation is arranged on the sample discharge pipeline 1-3; a first cut-off valve 2-2 and a second cut-off valve 2-3. The emptying pipeline 2-5 is provided with an adjustable and cut-off valve 1-5. The pressure compensation gas pipeline 2-6 is provided with a cutting ball valve 1-6 and a one-way valve 1-7. The gas inlet and outlet pipeline 2-4 is provided with a valve 1-4 for adjusting the gas flow rate and a pressure gauge 4-2 for observing the pressure. The sampling pipeline 1-1 is connected with the sampling tank 3-1 through a tee joint I1-8, and the tee joint I1-8 is also connected with a gas inlet and outlet pipeline 2-4. The periphery of the sampling pipeline 1-1, the sampling tank 3-1, the sample discharge pipeline 1-3, the gas inlet and outlet pipeline 2-4, the pressure compensation gas pipeline 2-6 or the emptying pipeline 2-5 is provided with an electric heating device 4-1.
Examples
As shown in fig. 1, the utility model discloses to chemical plant high temperature, high pressure, the medium is poisonous, inflammable and explosive's operating mode characteristics, a set of sealed sampling system is proposed, accessible pressure compensating gas supplements the pressure of sampling system to by the pressure of sampling system before the sampling, then open the valve on the intercommunication pipeline, the liquid phase flows into the sampling tank under the effect of gravity, cut off the valve on the intercommunication pipeline after the collection sample, open the valve on the pipeline of releasing and release the gas in the sampling tank, pressure reduction, open the valve row material of sampling tank bottom again, the sample that will gather shifts the processing and carries out the off-line analysis.
The structure of the utility model is as shown in figure 1, and the whole sampling system is composed of a pipeline joint part, a valve part, a sampling tank, a heat tracing part and an instrument part. One end of a sampling pipeline 1-1 is connected with a sampling point of a chemical device, the other end of the sampling pipeline is connected with a sampling feed cut-off valve 2-1(VN-001), an outlet pipeline 1-2 of the sampling pipeline penetrates through a tee joint I1-8 and extends into a sampling tank 3-1(V-001), and the extending depth does not exceed the height 1/3 of the tank body; a side interface of the tee joint I1-8 is connected with a gas inlet and outlet pipeline 2-4, and the pipeline is provided with a valve 1-4(VN-004) capable of adjusting the inlet and outlet flow rate of gas in the sampling tank and a pressure gauge 4-2(PI-001) for visually observing the pressure in the sampling tank; the gas inlet and outlet pipeline 2-4 is connected with one interface of the three-way joint II 1-9, one interface of the three-way joint II 1-9 is connected with the emptying pipeline 2-5, the pipeline is provided with an adjustable and cuttable valve 1-5(VN-005), the other interface of the three-way joint II is connected with the pressure compensation gas pipeline 2-6, and the pipeline is provided with a cutting ball valve 1-6(VB-001) and a one-way valve 1-7 (VC-001). The bottom of the sampling tank 3-1 is connected with a sample discharge pipeline 1-3, and a double-cut-off valve for isolating high pressure and low pressure is arranged on the sample discharge pipeline 1-3; a first cut-off valve 2-2(VN-002) and a second cut-off valve 2-3 (VN-003). In order to prevent the materials from condensing and poor in mobility in the material sampling process, all pipelines and sampling tanks contacting the materials are provided with electric heating devices 4-1(HT-001), and the heat tracing temperature is controlled by a control system of a sampled device and can also be controlled by an on-site intelligent instrument.
The pipeline in the sampling system is generally a 1/4' or phi 6mm sleeve, the volume of the sampling tank is generally not more than 1L, and the two ends of the sampling tank are opened. In order to improve the temperature resistance of the sampling system, a valve in contact with a sampling material is generally a high-temperature-resistant needle valve. The pressure compensation gas is generally selected from inert gases such as nitrogen, helium and the like.
The sampling operation process is as follows: 1) before sampling, valves VN-001, VN-002 and VN-003 are checked and closed, and the heat tracing temperatures of pipelines and sampling tanks are set; 2) boosting the pressure of the sampling tank V-001 by 0.2-0.3MPag through pressure compensation gas, then discharging, repeating for 2-3 times, and replacing the air in the sampling tank; 3) closing a discharge valve VN-005, opening a valve VB-001 on a pressure compensation gas line, observing a pressure gauge PI-001 on the line, slowly screwing off a flow regulation needle valve VN-004 to enable the pressure in a sampling tank to reach the pressure of a sampled system within 1-2 minutes, then closing the valve VB-001 on the compensation gas line, loosening the valve VN-005 on a gas phase discharge line, observing the pressure gauge PI-001, enabling a pressure drop value of a pointer to be not more than 0.5MPa within one minute, then opening the valve VB-001 on the compensation gas line 2-6, and closing the valve VB-001 after the pressure of the sampled system is reached; 4) opening a valve VN-001 on a sampling pipeline 1-1, enabling the material to flow into a sampling tank under the pushing of pressure, and closing the valve VN-001 after sampling for 3-5 minutes; 5) and when the pressure in the sampling tank is slightly higher than the atmospheric pressure, closing the relief valve VN-005, opening the double valves VN-002 and VN-003 on the sample discharge pipeline 1-3 at the bottom of the sampling tank, and collecting the collected sample, wherein the sampling process is finished.
The foregoing is merely a preferred embodiment of the present invention, and is not intended to limit the present invention in any way and in any way, and it should be understood that modifications and additions may be made by those skilled in the art without departing from the scope of the present invention. Those skilled in the art can make various changes, modifications and evolutions equivalent to those made by the above-disclosed technical content without departing from the spirit and scope of the present invention, and all such changes, modifications and evolutions are equivalent embodiments of the present invention; meanwhile, any changes, modifications and evolutions of equivalent changes to the above embodiments according to the actual technology of the present invention are also within the scope of the technical solution of the present invention.
Claims (8)
1. An online liquid phase sampling system of a high-pressure chemical device; the method is characterized in that: comprises a sampling pipeline, a sampling tank, a sample discharge pipeline, a gas inlet and outlet pipeline, a pressure compensation gas pipeline and a vent pipeline; the sampling pipeline is connected with the sample discharge pipeline through a sampling tank, and a gas inlet and outlet pipeline is arranged on the sampling tank; the gas inlet and outlet pipeline is connected with the pressure compensation gas pipeline and the emptying pipeline through a second three-way joint.
2. The on-line liquid phase sampling system of the high pressure chemical plant according to claim 1, wherein: and a sampling feeding cut-off valve is arranged between the sampling pipeline and the sampling tank.
3. The on-line liquid phase sampling system of the high pressure chemical plant according to claim 2, wherein: and a double-cut-off valve for high-low pressure isolation is arranged on the sample discharge pipeline.
4. The on-line liquid phase sampling system of the high pressure chemical plant according to claim 3, wherein: and an adjustable and cuttable valve is arranged on the emptying pipeline.
5. The on-line liquid phase sampling system of the high pressure chemical plant according to claim 4, wherein: and a cutting ball valve and a one-way valve are arranged on the pressure compensation gas pipeline.
6. The on-line liquid phase sampling system of the high pressure chemical plant according to claim 5, wherein: and the gas inlet and outlet pipeline is provided with a valve for adjusting the gas flow rate and a pressure gauge for observing the pressure.
7. The on-line liquid phase sampling system of the high pressure chemical plant according to claim 6, wherein: the sampling pipeline is connected with the sampling tank through a first tee joint, and the first tee joint is further connected with a gas inlet and outlet pipeline.
8. The on-line liquid phase sampling system of the high pressure chemical plant according to claim 7, wherein: and the peripheries of the sampling pipeline, the sampling tank, the sample discharge pipeline, the gas inlet and outlet pipeline, the pressure compensation gas pipeline or the emptying pipeline are provided with electric heating devices.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022946594.9U CN214408154U (en) | 2020-12-11 | 2020-12-11 | Online liquid phase sampling system of high-pressure chemical device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202022946594.9U CN214408154U (en) | 2020-12-11 | 2020-12-11 | Online liquid phase sampling system of high-pressure chemical device |
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| CN214408154U true CN214408154U (en) | 2021-10-15 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117969193A (en) * | 2024-04-02 | 2024-05-03 | 北京博赛德科技有限公司 | Jacket needle type convection displacement positive pressure sampling device |
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2020
- 2020-12-11 CN CN202022946594.9U patent/CN214408154U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117969193A (en) * | 2024-04-02 | 2024-05-03 | 北京博赛德科技有限公司 | Jacket needle type convection displacement positive pressure sampling device |
| CN117969193B (en) * | 2024-04-02 | 2024-11-29 | 北京博赛德科技有限公司 | Jacketed needle convection displacement positive pressure sampling device |
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