CN217605401U - Low-temperature liquefied gas sampler for preparing propylene by propane dehydrogenation - Google Patents
Low-temperature liquefied gas sampler for preparing propylene by propane dehydrogenation Download PDFInfo
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- CN217605401U CN217605401U CN202221116767.7U CN202221116767U CN217605401U CN 217605401 U CN217605401 U CN 217605401U CN 202221116767 U CN202221116767 U CN 202221116767U CN 217605401 U CN217605401 U CN 217605401U
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Abstract
The utility model provides a propane dehydrogenation system low temperature liquefied gas sample thief for propylene relates to the sampling test technical field, and the main objective provides a sampling device suitable for low temperature liquefied gas. The sampling valve group of the device is connected with a sample conveying pipe through a sample inlet flange and a sample outlet flange respectively, the sampling valve group is also provided with a sampling station, and the sampling station is provided with a first gas guide port and a second gas guide port; the sampling steel cylinder is detachably arranged on the sampling station and is connected with the sampling valve group through the first gas guide port and the second gas guide port, and gas in the sampling valve group can flow into the sampling steel cylinder through the first gas guide port and flow back through the second gas guide port; and the pressure indicator is communicated with the sampling steel cylinder and/or the sampling valve group.
Description
Technical Field
The utility model belongs to the technical field of gas sampling technique and specifically relates to a propane dehydrogenation system low temperature liquefied gas sample thief for propylene is related to.
Background
When the temperature is low to a certain degree, the gas can be changed from a gaseous state to a liquid state, and the liquid gas is helpful for storage and transportation. When the liquid gas needs to be sampled and detected, the liquid gas can expand rapidly due to temperature change, so that the pressure in a storage tank or a pipeline for storing the liquid gas also increases rapidly, and a large potential safety hazard exists.
Convenient, swift low temperature liquefied gas sampling process, guarantee operating personnel's safety simultaneously, need research and development a novel propane dehydrogenation system propylene with low temperature liquefied gas sample thief structure.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a propane dehydrogenation system low temperature liquefied gas sample thief for propylene to solve the inconvenient technical problem of low temperature liquefied gas sampling that exists among the prior art. The utility model provides a plurality of technological effects that preferred technical scheme among a great deal of technical scheme can produce are seen in the explanation below in detail.
In order to achieve the above purpose, the utility model provides a following technical scheme:
the utility model provides a propane dehydrogenation system propylene uses low temperature liquefied gas sample thief, include:
the sampling valve group is connected with the sample conveying pipe through a sample inlet flange and a sample outlet flange respectively, a sampling station is further arranged on the sampling valve group, and a first air guide port and a second air guide port are arranged on the sampling station;
the sampling steel cylinder is detachably arranged on the sampling station and is connected with the sampling valve group through the first gas guide port and the second gas guide port, and gas in the sampling valve group can flow into the sampling steel cylinder through the first gas guide port and flow back through the second gas guide port;
the pressure indicator is communicated with the sampling steel cylinder and/or the sampling valve group.
On the basis of the technical scheme, the utility model discloses can also do following improvement.
As a further improvement, the sampling steel cylinder is provided with an upper valve and a lower valve respectively, the upper valve is connected with the first gas guide port, and the lower valve is connected with the second gas guide port.
As a further improvement of the utility model, the sampling valves is including being close to the sample import valve that sample entry flange set up with be close to the sample return valve that sample exit flange set up, work as the sample import valve with when the sample return valve all is in the open mode, the sample can pass through the sample import valve with the lower valve flows into in the sampling steel bottle, and the warp go up the valve with the sample returns the valve and flows back to in the sample delivery pipe.
As a further improvement of the present invention, the sampling valve set further comprises a pressure relief communicating valve and an air release valve, wherein the pressure relief communicating valve is located between the second air guide port and the air release valve; the upstream of the emptying valve is positioned between the sample return valve and the pressure relief communicating valve, and the downstream of the emptying valve is communicated with an air release pipe.
As a further improvement of the utility model, the air release pipe is communicated with the external environment or the burner.
As a further improvement of the utility model, the sample inlet valve the sample returns the valve the pressure release intercommunication valve the atmospheric valve go up the valve with the lower valve is the low temperature needle valve.
As a further improvement of the utility model, the sample inlet valve is connected the sample returns the valve the pressure release intercommunication valve with the pipeline of emptying valve is the nonrust steel pipe of 6mm spiral.
As a further improvement, the first gas guide port and the second gas guide port are provided with a steel cylinder seat, the steel cylinder passes through the steel cylinder seat with the sampling valve group links to each other.
As a further improvement of the utility model, a heat preservation layer is arranged in the sampling steel cylinder.
Compared with the prior art, the low-temperature liquefied gas sampler for preparing propylene by propane dehydrogenation provided by the preferred embodiment of the utility model has simple operation and is safer compared with the traditional sampling device; by using the valve group structure, not only can the connection points between pipelines be effectively reduced, but also the distance of a valve connection channel can be reduced, so that the joint part is positioned behind the valve group, and the safety and controllability of the sampling process are ensured; in addition, the sampling steel cylinder can realize quick butt joint and installation through the corresponding structure of the steel cylinder seat that is located on the sampling valves fast, accurate and sampling valves, effectively guarantees the high efficiency and the security of sampling process, avoids connecting the fault and damaging because of connecting.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic view of the overall structure of the low-temperature liquefied gas sampler for preparing propylene by propane dehydrogenation according to the present invention;
fig. 2 is a schematic structural diagram of the sampling valve group in fig. 1.
In the figure: 1. a sampling valve group; 11. a sample inlet valve; 12. a sample return valve; 13. a pressure relief communicating valve; 14. An atmospheric valve; 2. a sample inlet flange; 3. a sample outlet flange; 4. sampling a steel cylinder; 41. an upper valve; 42. A lower valve; 5. a pressure indicator.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be described in detail below. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and to simplify the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should also be noted that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood as the case may be, by those of ordinary skill in the art.
The technical solution of the present invention will be specifically described with reference to the accompanying drawings.
The utility model provides a propane dehydrogenation system low temperature liquefied gas sample thief for propylene, this sample thief is applicable to and samples low temperature liquefied gas.
This sample thief includes sampling valves 1, sampling steel bottle 4 and pressure indicating part 5, as shown in fig. 1, wherein pressure indicating part 5 can be used for detecting the pressure value of sampling valves 1 and/or 4 departments of sampling steel bottle respectively to help the user to judge opening and shutting of corresponding valve in the sampling valves 1.
The sampling valve group 1 can realize circulation of liquefied gas in a sample conveying pipeline under a low-temperature environment, so that the sampling steel cylinder 4 is assisted to realize sealing and sampling under a zero-pressure environment.
Specifically, above-mentioned sampling valves 1 links to each other with the sample conveying pipe through sample entry flange 2 and sample outlet flange 3 respectively, still is provided with a sampling station on the sampling valves 1, is provided with first gas port and second gas port of leading on the sampling station, and sampling steel bottle 4 can be installed on above-mentioned sampling station when using.
The sampling steel cylinder 4 can be vertically arranged, at the moment, the upper end and the lower end of the sampling steel cylinder 4 are respectively provided with an upper valve 41 and a lower valve 42, wherein the upper valve 41 and the lower valve 42 can be respectively connected with the sampling valve group 1 through a first gas guide port and a second gas guide port which are positioned on a sampling station. When the relevant valves in the sampling valve group 1 are in an open state and both the upper valve 41 and the lower valve 42 of the sampling steel cylinder 4 are in an open state, the liquefied gas in the sample delivery pipeline can flow into the sampling steel cylinder 4 and flow back to the sample delivery pipeline through the sampling valve group 1.
It should be noted that, the pressure indicator 5 is a pressure gauge structure connected to the sampling valve set 1 and the sampling steel cylinder 4 through pipes, and the pressure gauge structure can detect the pressure in the sampling valve set 1 and the sampling steel cylinder 4 according to the opening and closing of the valve.
The structure of the sampling valve group 1 is shown in fig. 2:
the sampling valve group 1 comprises a sample inlet valve 11 arranged close to the sample inlet flange 2 and a sample return valve 12 arranged close to the sample outlet flange 3, and when the sample inlet valve 11 and the sample return valve 12 are both in an open state, a sample can flow into the sampling steel cylinder 4 through the sample inlet valve 11 and the lower valve 42 and flow back into the sample conveying pipe through the upper valve 41 and the sample return valve 12.
As an optional embodiment, the sampling valve group 1 further includes a pressure relief communication valve 13 and an air release valve 14, where the pressure relief communication valve 13 is located between the second air guide port and the air release valve 14; the upstream of the vent valve 14 is located between the sample return valve 12 and the pressure relief communication valve 13, and the downstream of the vent valve 14 communicates with the vent pipe.
As an alternative embodiment, the air release pipe is communicated with the external environment or the combustor.
The low-temperature liquefied gas sampler for preparing propylene by propane dehydrogenation is used in the following mode:
(1) Confirming that a first air guide port and a second air guide port on a sampling valve group 1 are both in an opening state, and confirming that a sample inlet flange 2, a sample outlet flange 3, a sample conveying pipe and the like are all in a normal state;
(2) Installing the sampling steel cylinder 4 on a sampling station of the sampling valve group 1, ensuring that the first guide gas port and the second guide gas port are correctly installed with the upper valve 41 and the lower valve 42 at the moment, and then opening the upper valve 41 and the lower valve 42;
(3) Opening the sample return valve 12, opening the sample inlet valve 11 when the reading of the pressure gauge is 0MPa, maintaining the cyclic displacement state for about 30s, and then closing the upper valve 41; when the reading of the pressure gauge exceeds 1.5 MPa, the lower valve 42 is closed, and sampling is completed;
(4) Closing the sample inlet valve 11, immediately followed by opening the pressure relief communication valve 13 and closing the sample return valve 12;
(5) Opening an emptying valve 14, and closing the valve until the reading displayed at the pressure gauge is reduced to 0 MPa;
(6) The pressure relief communication valve 13 is closed and the sampling cylinder 4 is removed.
The low-temperature liquefied gas sampling operation can be safely and quickly completed through the operation.
It should be noted that, in order to ensure that the sampling device is not polluted by the external environment, the first air guide port and the second air guide port may also be provided with valve structures.
As an alternative embodiment, the sample inlet valve 11, the sample return valve 12, the pressure relief communication valve 13, the vent valve 14, the upper valve 41 and the lower valve 42 are all low temperature needle valves. Compare with the ball valve, the needle valve is more accurate in the operation, also can maintain higher closed firmness after using for a long time simultaneously, closed not tight problem can not appear.
To avoid leakage, a valve structure may also be provided on the pipe connecting the sample inlet valve 11 and the sample inlet flange 2.
As an optional implementation manner, the first gas guide port and the second gas guide port are both provided with a steel cylinder seat, and the steel cylinder is connected with the sampling valve group 1 through the steel cylinder seat.
As an alternative embodiment, the sampling cylinder 4 is provided with an insulating layer inside.
As an alternative embodiment, the pipelines connecting the sample inlet valve 11, the sample return valve 12, the pressure relief communication valve 13 and the vent valve 14 are all 6mm spiral stainless steel pipes. In addition, the structures of the pipeline, the sampling steel cylinder, the joint and the like in the structure are all made of 316 stainless steel materials.
The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. Propane dehydrogenation system propylene is with low temperature liquefied gas sample thief, its characterized in that includes:
the sampling valve group is connected with the sample conveying pipe through a sample inlet flange and a sample outlet flange respectively, a sampling station is further arranged on the sampling valve group, and a first air guide port and a second air guide port are arranged on the sampling station;
the sampling steel cylinder is detachably arranged on the sampling station and is connected with the sampling valve group through the first gas guide port and the second gas guide port, and gas in the sampling valve group can flow into the sampling steel cylinder through the first gas guide port and flow back through the second gas guide port;
the pressure indicator is communicated with the sampling steel cylinder and/or the sampling valve group.
2. The sampling apparatus for a low-temperature liquefied gas for producing propylene by propane dehydrogenation according to claim 1, wherein the sampling cylinder is provided with an upper valve and a lower valve, respectively, the upper valve being connected to the first gas guide port, and the lower valve being connected to the second gas guide port.
3. The low-temperature liquefied gas sampler for producing propylene by propane dehydrogenation according to claim 2, wherein the sampling valve block comprises a sample inlet valve disposed near the sample inlet flange and a sample return valve disposed near the sample outlet flange, and when the sample inlet valve and the sample return valve are both in an open state, a sample can flow into the sampling cylinder through the sample inlet valve and the lower valve and flow back into the sample delivery pipe through the upper valve and the sample return valve.
4. The low-temperature liquefied gas sampler for preparing propylene by propane dehydrogenation according to claim 3, wherein the sampling valve set further comprises a pressure relief communication valve and a blow-down valve, and the pressure relief communication valve is located between the second gas guide port and the blow-down valve;
the upstream of the emptying valve is positioned between the sample return valve and the pressure relief communicating valve, and the downstream of the emptying valve is communicated with an air release pipe.
5. The sampler for the low-temperature liquefied gas used for preparing propylene by propane dehydrogenation according to claim 4, wherein the gas release pipe is communicated with the external environment or a burner.
6. The sampler for low-temperature liquefied gas used for preparing propylene by propane dehydrogenation according to claim 4, wherein the sample inlet valve, the sample return valve, the pressure relief communication valve, the blow-down valve, the upper valve and the lower valve are all low-temperature needle valves.
7. The sampler for the low-temperature liquefied gas used for preparing propylene by propane dehydrogenation according to claim 4, wherein the pipelines connecting the sample inlet valve, the sample return valve, the pressure relief communication valve and the air relief valve are all 6mm spiral stainless steel pipes.
8. The low-temperature liquefied gas sampler for preparing propylene by propane dehydrogenation according to claim 2, wherein the first gas guide port and the second gas guide port are both provided with a steel cylinder seat, and the steel cylinder is connected with the sampling valve group through the steel cylinder seat.
9. The sampling apparatus for a low-temperature liquefied gas for use in producing propylene by propane dehydrogenation according to any one of claims 1 to 8, wherein the sampling cylinder has a heat-insulating layer built therein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221116767.7U CN217605401U (en) | 2022-04-29 | 2022-04-29 | Low-temperature liquefied gas sampler for preparing propylene by propane dehydrogenation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221116767.7U CN217605401U (en) | 2022-04-29 | 2022-04-29 | Low-temperature liquefied gas sampler for preparing propylene by propane dehydrogenation |
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| Publication Number | Publication Date |
|---|---|
| CN217605401U true CN217605401U (en) | 2022-10-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221116767.7U Active CN217605401U (en) | 2022-04-29 | 2022-04-29 | Low-temperature liquefied gas sampler for preparing propylene by propane dehydrogenation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217605401U (en) |
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- 2022-04-29 CN CN202221116767.7U patent/CN217605401U/en active Active
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