CN211877526U - Online sampling device of olefin gas - Google Patents
Online sampling device of olefin gas Download PDFInfo
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- CN211877526U CN211877526U CN201921998168.0U CN201921998168U CN211877526U CN 211877526 U CN211877526 U CN 211877526U CN 201921998168 U CN201921998168 U CN 201921998168U CN 211877526 U CN211877526 U CN 211877526U
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- 238000005070 sampling Methods 0.000 title claims abstract description 108
- 150000001336 alkenes Chemical class 0.000 title claims abstract description 83
- JRZJOMJEPLMPRA-UHFFFAOYSA-N olefin Natural products CCCCCCCC=C JRZJOMJEPLMPRA-UHFFFAOYSA-N 0.000 title claims description 57
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 68
- 239000007789 gas Substances 0.000 claims abstract description 48
- 229910001873 dinitrogen Inorganic materials 0.000 claims abstract description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 31
- 238000010926 purge Methods 0.000 claims description 15
- 230000001681 protective effect Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 13
- 238000003912 environmental pollution Methods 0.000 abstract description 3
- 238000004519 manufacturing process Methods 0.000 description 15
- 229920000098 polyolefin Polymers 0.000 description 7
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 5
- 239000005977 Ethylene Substances 0.000 description 5
- 239000003054 catalyst Substances 0.000 description 4
- 238000006073 displacement reaction Methods 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- QQONPFPTGQHPMA-UHFFFAOYSA-N propylene Natural products CC=C QQONPFPTGQHPMA-UHFFFAOYSA-N 0.000 description 3
- 125000004805 propylene group Chemical group [H]C([H])([H])C([H])([*:1])C([H])([H])[*:2] 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 230000006378 damage Effects 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000005086 pumping Methods 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 239000011261 inert gas Substances 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000010186 staining Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
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Abstract
The utility model relates to an online sampling device of alkene gas, this sampling device include the protection casing and fix through the fixer sample jar in the protection casing, the top of sample jar is equipped with the total pipeline of sampling of terminal being equipped with the valve, the total pipeline of sampling sweeps pipeline, sample pipeline and unloading pipeline intercommunication with the nitrogen gas that the terminal all was equipped with the valve respectively, the top of sample jar still is equipped with the manometer, the bottom of sample jar is equipped with piston injector, piston injector is located the internal of jar of sample jar, and can follow the inner wall of the jar body reciprocates. The utility model provides an online sampling device of alkene gas can be used to the online isolated air of alkene gas sample, can guarantee that whole sampling process goes on under airtight condition, and sample does not take place to leak in the sampling process, both can avoid sample and external gas to contact, guarantees the purity and the accuracy of sample, reducible environmental pollution again, protects operating personnel's personal safety effectively.
Description
Technical Field
The utility model relates to an olefin polymerization field especially relates to an online sampling device of olefin gas.
Background
In recent years, the world economy has been increasing and the living standard of residents has been increasing, and the production of olefin industry is increasing as a tap of petrochemical industry. In 2017, the world ethylene capacity is 1.69 hundred million tons, and the yield is 1.51 hundred million tons; the world propylene capacity is 1.27 million tons, and the yield is 1.02 million tons. Ethylene production is mainly concentrated in asia, north america, the middle east and western europe, accounting for 35%, 22%, 20% and 14% of the total production energy worldwide, respectively. Asia is also central to propylene production, with propylene capacity accounting for 64% of the total global production, and north america, the middle east and western europe totaling only 28%. As the total demand is increased and the technology level is continuously improved, the world olefin production is further developed towards large-scale and basic directions, and the industrial concentration is further improved. Currently, the annual capacity scale of over millions of tons of ethylene plants built in the world is nearly 40, and the maximum single-series ethylene plant scale reaches 150 million tons/year. In our country, a single set of devices with the ethylene scale of more than 80 million tons/year have 13 sets, and 9 sets are added compared with 2008.
Along with the development of the oil and gas industry and the coal chemical industry, the raw materials and production routes of the olefin industry are gradually changed, and ethane cracking and coal-to-olefin industry gradually occupy domestic markets. Because of the different routes of olefin production, the impurities contained in olefins vary widely. The olefin products produced by the device can leave a factory after being analyzed and detected to be qualified, and are provided for downstream users. For accurate detection, a certain amount of olefin sample needs to be taken on-line from the olefin line of the production plant.
In addition, polyolefins are the largest derivatives downstream of olefins. The development of polyolefin catalysts requires evaluation of the catalyst performance and also requires taking certain olefin samples from the polyolefin production plant. Sampling from a polyolefin production device and storing an olefin sample need to be isolated from air, if the olefin sample is contacted with the air, the olefin sample is polluted, and the catalyst is poisoned during an olefin polymerization test, so that the performance of the catalyst is influenced; other gases mixed in the olefin sampling process can cause interference to factory indexes, and trade disputes are caused. In addition, the olefin raw materials have certain toxicity, flammability and explosiveness, and if olefin leakage is caused by improper operation, the olefin raw materials not only pollute the environment, but also bring harm to the personal safety of sampling personnel. Therefore, the sampling process needs to be convenient to operate and air-isolated, and residual gas in the sampler needs to be convenient to process after the sample is detected, so that a proper online sampling device is needed.
When the existing olefin production device is used for sampling olefin, a civil liquefied gas tank or a self-made temporary tank is often used, the structures of the tanks are unreasonable, olefin leakage can be caused in the sampling process, the environment is polluted, and the injury is caused to sampling personnel; there is also a safety hazard in the storage of olefins.
CN207090180U discloses an olefin sampling and storing device, connected to a polyolefin production device, comprising: the top of the tank body is provided with a sampling connecting port, and the bottom of the tank body is provided with a discharge port; the nitrogen displacement unit comprises a nitrogen purging port, a vent port and a nitrogen source, the nitrogen purging port and the vent port are arranged at the top of the tank body, and when the nitrogen in the tank body is displaced, the nitrogen purging port is connected with the nitrogen source; the bearing frame is connected with the bottom of the tank body and used for supporting the tank body; the safety monitor is arranged at the top of the tank body; and the pressure measuring device is arranged at the top of the tank body.
CN 206960158U discloses a multifunctional olefin sampling and storing device, which is connected to a polyolefin production device, and comprises: the top of the tank body is provided with a sampling connecting port, and the bottom of the tank body is provided with a discharge port; the nitrogen displacement unit comprises a nitrogen purging port, a vent port, a discharge hole and a nitrogen source, wherein the nitrogen purging port and the vent port are arranged at the top of the tank body, the discharge hole is arranged at the bottom of the tank body, and when the nitrogen in the tank body is displaced, the nitrogen purging port is connected with the nitrogen source; the bearing frame is connected with the bottom of the tank body and used for supporting the tank body; the safety monitor is arranged at the top of the tank body; the pressure measuring device is arranged at the top of the tank body; the meter is arranged on the bearing frame; and the heating device is arranged inside or on the outer wall of the tank body.
CN 206958597U discloses an olefin sampling and storing device with heating function, which is connected to a polyolefin production device, and comprises: the top of the tank body is provided with a sampling connecting port, and the bottom of the tank body is provided with a discharge port; the nitrogen displacement unit comprises a nitrogen purging port, a vent port and a nitrogen source, the nitrogen purging port and the vent port are arranged at the top of the tank body, and when the nitrogen in the tank body is displaced, the nitrogen purging port is connected with the nitrogen source; the bearing frame is connected with the bottom of the tank body and used for supporting the tank body; the safety monitor is arranged at the top of the tank body; the pressure measuring device is arranged at the top of the tank body; and the external heating device is arranged on the outer surface of the tank body.
The existing olefin gas sampling and storing devices can be used for sampling olefin isolated air, and can prevent the sampled olefin from leaking to pollute the environment during sampling.
However, the above-mentioned series of devices are mainly used for olefin sample storage, and other inert gases are easily mixed when sampling is performed by using the series of devices, so how to better realize online sampling of olefin gas is a key problem that needs to be solved urgently in the olefin industry.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the defect that current gaseous sampling process of alkene exists, provide a safe and reliable's gaseous online sampling device of alkene, its seal is good, not polluted by external gas, and the non-staining environment can effectively protect operating personnel's personal safety.
In order to realize the above object, the utility model provides an online sampling device of alkene gas, include the protection casing and fix through the fixer sample jar in the protection casing, the top of sample jar is equipped with the terminal sampling main line that is equipped with the valve, the sampling main line sweeps pipeline, sample pipeline and unloading pipeline intercommunication with the terminal nitrogen gas that all is equipped with the valve respectively, the top of sample jar still is equipped with the manometer, the bottom of sample jar is equipped with piston injector, piston injector is located the internal of jar of sample jar, and can follow the inner wall of the jar body reciprocates.
Gaseous online sampling device of alkene, wherein preferred, the sampling main line pass through the cross valve with nitrogen gas sweep the pipeline the sampling pipeline and unloading pipeline intercommunication.
Gaseous online sampling device of alkene, wherein preferred, the jar body can be dismantled, be convenient for sample, reading and emission.
The utility model discloses an online sampling device of alkene gas, wherein preferred, the piston syringe with jar body sealing connection.
Gaseous online sampling device of alkene, wherein preferred, the protection casing comprises base and upper cap, the base with upper cap swing joint.
The utility model discloses an online sampling device of alkene gas, wherein preferred, the base with go up the cap and be threaded connection.
The utility model discloses an olefin gas online sampling device, wherein preferably, the outside of base is equipped with the handle, is convenient for remove and carry this sampling device; and a combustible gas alarm is arranged in the upper cap and used for detecting whether the olefin gas leaks.
Gaseous online sampling device of alkene, wherein preferred, the fixer is located on the inner wall of base.
Gaseous online sampling device of alkene, wherein preferred, gaseous sampling device of alkene is before the sample, the valve all is in closed condition.
The utility model discloses an online sampling device of alkene gas, wherein preferred, the valve is check valve.
The utility model provides an online sampling device of gaseous isolated outside air of alkene can be used to the gaseous isolated outside air sample of alkene, can guarantee to go on under airtight condition in the whole sampling process, and fundamentally guarantees that the sample does not take place to leak in the sampling process, both can avoid sample and outside gas to contact, guarantees the purity and the accuracy of sample, and reducible environmental pollution again protects operating personnel's personal safety effectively.
Meanwhile, the olefin gas online sampling device is simple in structure and low in processing cost.
Drawings
FIG. 1 is a schematic structural diagram of an olefin gas online sampling device of the present invention.
Reference numerals
Sampling main pipeline (1)
Nitrogen purging pipeline (2)
Sampling line (3)
Emptying pipeline (4)
Tank (5)
Piston injector (6)
Fixator (7)
Pressure meter (8)
Base (9)
Upper cap (10)
Flammable gas alarm (11)
Handle (12)
Detailed Description
The following is a detailed description of embodiments of the invention: the present embodiment is implemented on the premise of the technical solution of the present invention, and detailed embodiments and processes are given, but the scope of the present invention is not limited to the following embodiments, and the experimental methods without specific conditions noted in the following embodiments are generally in accordance with conventional conditions.
Referring to fig. 1, the utility model provides an online sampling device of gaseous alkene, this online sampling device of gaseous alkene include the protection casing and fix through fixer 7 sample jar 5 in the protection casing, the top of sample jar is equipped with the terminal sampling main line 1 that is equipped with the valve, sampling main line 1 sweeps pipeline 2, sampling pipeline 3 and the 4 intercommunications of unloading pipeline with the terminal nitrogen gas that all is equipped with the valve respectively through the cross valve, the top of sample jar still is equipped with manometer 8, the bottom of sample jar 5 is equipped with piston injector 6, piston injector 6 is located the internal of the jar of sample jar 5, and can follow the inner wall of the jar body reciprocates.
In some embodiments, the canister 5 is removable for ease of sampling, reading, and draining.
In some embodiments, the piston syringe 6 is sealingly connected to the canister.
In some embodiments, the shield is composed of a base 9 and an upper cap 10, the base 9 and the upper cap 10 being movably connected.
In some embodiments, the base 9 and the upper cap 10 are threaded.
In some embodiments, the base 10 is provided with a handle 12 on the exterior to facilitate movement and carrying of the sampling device; and a combustible gas alarm 11 is arranged in the upper cap 10 and used for detecting whether the olefin gas leaks or not.
In some embodiments, the holder 7 is located on an inner wall of the base 9.
In some embodiments, the olefin gas sampling device is configured such that the valves are closed prior to sampling.
In some embodiments, the valve is a one-way valve.
Example 1
As shown in figure 1, the utility model discloses an online sampling device of alkene gas, include the protection casing and fix through fixer 7 sample jar in the protection casing, the top of sample jar is equipped with terminal sampling main line 1 who is equipped with the valve, and this sampling main line 1 sweeps pipeline 2, sampling pipeline 3 and unloading pipeline 4 intercommunication through cross valve and nitrogen gas, the top of sample jar still is equipped with manometer 8, the bottom of sample jar is equipped with piston injector 6, piston injector 6 is located in the jar body 5 of sample jar, and can follow the inner wall of jar body 5 reciprocates.
The tank body 5 is detachable, so that sampling, reading and discharging are facilitated;
the piston injector 6 is connected with the tank body 5 in a sealing way;
the protective cover consists of a base 9 and an upper cap 10, wherein the base 9 is movably connected with the upper cap 10 through threads;
a handle 12 is arranged outside the base 9, so that the sampling device is convenient to move and carry; a combustible gas alarm 11 is arranged in the upper cap 10 and used for detecting whether the olefin gas leaks;
the fixer 7 is positioned on the inner wall of the base 9;
before sampling, the valves of the olefin gas sampling device are all in a closed state.
Gaseous online sampling device of alkene, the working process as follows:
before use, the base 9 of the protective cover is disconnected with the upper cap 10 of the anti-skid cover; all valves on the olefin gas in-line sampling device are closed and the piston injector 6 is pushed to the top of the tank of the sampling tank.
Before sampling, an olefin gas on-line sampling device is connected to an olefin line through a sampling line 3. Then, opening a valve on the nitrogen purge line 2 to allow nitrogen to enter the sampling device, opening a vent line 4 to perform pressure replacement for 5 times, and closing all valves; and opening a valve of the nitrogen purging pipeline 2, enabling nitrogen to enter, opening the sampling main pipeline 1 and the emptying pipeline 4, introducing nitrogen, pumping the piston injector 6 from the top to the bottom, pushing the piston injector from the bottom to the top, completing the pressure replacement operation of the sampling device once, repeating the operation for 10 times, closing all the valves, and pushing the piston injector 6 to the top of the sampling device.
Opening valves of a sampling main pipeline 1 and a sampling pipeline 3, starting olefin gas sampling, slowly pumping a piston injector 6 during sampling, observing the reading of a pressure gauge 8 of a sampling device, and stopping sampling when the pressure reaches a required value; closing all valves after sampling; opening the valves of the nitrogen purging pipeline 2 to allow nitrogen to enter, opening the emptying pipeline 4 to perform nitrogen purging and replacement for 5 times, and closing all the valves; disconnecting the olefin gas online sampling device from the olefin pipeline; the base 9 of the shield is connected with the upper cap 10 of the anti-slip cover.
The utility model provides an online sampling device of gaseous isolated outside air of alkene can be used to the gaseous isolated outside air sample of alkene, can guarantee to go on under airtight condition in the whole sampling process, and fundamentally guarantees that the sample does not take place to leak in the sampling process, both can avoid sample and outside gas to contact, guarantees the purity and the accuracy of sample, and reducible environmental pollution again protects operating personnel's personal safety effectively.
Meanwhile, the olefin gas online sampling device is simple in structure and low in processing cost.
Of course, the present invention can have other various embodiments, and those skilled in the art can make various corresponding changes and modifications according to the present invention without departing from the spirit and the essence of the present invention, and these corresponding changes and modifications should fall within the protection scope of the present invention.
Claims (10)
1. The utility model provides an olefin gas online sampling device, its characterized in that includes the protection casing and fixes through the fixer sample jar in the protection casing, the top of sample jar is equipped with the total pipeline of sampling of terminal outfit valve, the total pipeline of sampling sweeps pipeline, sample pipeline and unloading pipeline intercommunication with the nitrogen gas that the terminal all was equipped with the valve respectively, the top of sample jar still is equipped with the manometer, the bottom of sample jar is equipped with piston injector, piston injector is located the internal of jar of sample jar, and can follow the inner wall of the jar body reciprocates.
2. The on-line olefin gas sampling device according to claim 1, wherein the sampling main line is in communication with the nitrogen purge line, the sampling line, and the blowdown line through a four-way valve.
3. The on-line olefin gas sampling device according to claim 1, wherein the tank body is detachable.
4. The on-line olefin gas sampling device according to claim 1, wherein the piston injector is hermetically connected to the tank.
5. The on-line olefin gas sampling device according to claim 1, wherein the protective cover is composed of a base and an upper cap, and the base and the upper cap are movably connected.
6. The in-line olefin gas sampling device according to claim 5, wherein the base and the upper cap are threaded.
7. The on-line olefin gas sampling device according to claim 5, wherein a handle is arranged on the base, and a combustible gas alarm is arranged in the upper cap.
8. The in-line olefin gas sampling device according to claim 5, wherein the holder is located on an inner wall of the base.
9. The on-line sampling device for olefin gas as claimed in claim 1, wherein the valves are closed before sampling.
10. The on-line olefin gas sampling device according to claim 1, wherein the valve is a one-way valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921998168.0U CN211877526U (en) | 2019-11-18 | 2019-11-18 | Online sampling device of olefin gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921998168.0U CN211877526U (en) | 2019-11-18 | 2019-11-18 | Online sampling device of olefin gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211877526U true CN211877526U (en) | 2020-11-06 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921998168.0U Active CN211877526U (en) | 2019-11-18 | 2019-11-18 | Online sampling device of olefin gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211877526U (en) |
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- 2019-11-18 CN CN201921998168.0U patent/CN211877526U/en active Active
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