CN215842886U - Catalyst replacing device for vinyl chloride converter - Google Patents
Catalyst replacing device for vinyl chloride converter Download PDFInfo
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- CN215842886U CN215842886U CN202122222341.1U CN202122222341U CN215842886U CN 215842886 U CN215842886 U CN 215842886U CN 202122222341 U CN202122222341 U CN 202122222341U CN 215842886 U CN215842886 U CN 215842886U
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- chloroethylene
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Abstract
The utility model provides a catalyst replacing device for a chloroethylene converter, which comprises a chloroethylene converter, wherein the chloroethylene converter is provided with a temperature sensor, the top of the chloroethylene converter is respectively communicated with a filter and a first three-way switching valve through pipelines, the bottom of the chloroethylene converter is provided with a second three-way switching valve, the second three-way switching valve is provided with a fourth interface, a fifth interface and a sixth interface, the fourth interface is communicated with the bottom of the chloroethylene converter, the fifth interface is communicated with the filter, and the sixth interface is communicated with a main exhaust pipeline. The utility model realizes the switching of the air inlet and the air outlet of the chloroethylene converter through the DCS control system, and the catalyst is replaced after being completely failed, so that the manual screening and the turnover of the catalyst are not needed to be performed in a large amount of time, the operation time of the PVC system is effectively ensured, the economic benefit of an enterprise is increased, and the operation risk of operators is reduced.
Description
Technical Field
The utility model belongs to the technical field of chemical production, and relates to a catalyst replacing device for a chloroethylene converter.
Background
The polyvinyl chloride industry is the industry which takes acetylene, chlorine and hydrogen or ethylene and chlorine as raw materials to produce polyvinyl chloride through vinyl chloride synthesis and polymerization reaction. In recent years, the industrial capacity of polyvinyl chloride in China is rapidly improved, but the existing technology for producing polyvinyl chloride still has partial defects, such as: after the chloroethylene converter is put into service for a period of time, the activity of the catalyst is gradually reduced from bottom to top, so that the effective reaction time of the mixed gas (hydrogen chloride and acetylene) in the chloroethylene converter is shortened, and the chloroethylene conversion rate of the system is influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a catalyst replacing device for a vinyl chloride converter, aiming at solving the problems that the catalyst is screened and overturned for a large amount of time under the condition that the physical health of an operator is possibly damaged after the conversion rate of the vinyl chloride converter is reduced after the vinyl chloride converter is put into use for a period of time in the prior art.
Therefore, the utility model adopts the following technical scheme:
the utility model provides a catalyst replacement device for chloroethylene converter, includes the chloroethylene converter, the chloroethylene converter is equipped with temperature sensor, the top of chloroethylene converter is linked together through pipeline respectively with filter, first three-way switching valve is equipped with first interface, second interface and third interface, first interface is linked together with the top of chloroethylene converter, the second interface is linked together with the bottom of chloroethylene converter, the third interface is linked together with total air inlet pipeline, the bottom of chloroethylene converter is equipped with second three-way switching valve, second three-way switching valve is equipped with fourth interface, fifth interface and sixth interface, the fourth interface is linked together with the bottom of chloroethylene converter, the fifth interface is linked together with the filter, the sixth interface is linked together with total exhaust pipeline.
Further, still include DCS control system, DCS control system communicates with temperature sensor, first three-way switch valve and second three-way switch valve electricity respectively.
The utility model has the beneficial effects that:
the utility model realizes the switching of the air inlet and the air outlet of the chloroethylene converter through the DCS control system, and the catalyst is replaced after being completely failed, so that the manual screening and the turnover of the catalyst are not needed to be performed in a large amount of time, the operation time of the PVC system is effectively ensured, the economic benefit of an enterprise is increased, and the operation risk of operators is reduced.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
In the figure, 1-chloroethylene converter, 2-temperature sensor, 3-filter, 4-first three-way switching valve, 4 a-first interface, 4 b-second interface, 4 c-second interface, 5-total air inlet pipeline, 6-second three-way switching valve, 6 a-fourth interface, 6 b-fifth interface, 6 c-sixth interface, 7-total exhaust pipeline and 8-DCS control system.
Detailed Description
The technical scheme of the utility model is described in the following by combining the attached drawings and an implementation method.
As shown in fig. 1, a catalyst replacing device for a vinyl chloride converter comprises a vinyl chloride converter 1, the vinyl chloride converter 1 is provided with a temperature sensor 2, the top of the vinyl chloride converter 1 is respectively communicated with a filter 3 and a first three-way switching valve 4 through pipelines, the first three-way switching valve 4 is provided with a first interface 4a, a second interface 4b and a third interface 4c, wherein the first interface 4a is communicated with the top of the vinyl chloride converter 1, the second interface 4b is communicated with the bottom of the vinyl chloride converter 1, and the third interface 4c is communicated with a main air inlet pipeline 5.
The bottom of the chloroethylene converter 1 is provided with a second three-way switching valve 6, the second three-way switching valve 6 is provided with a fourth interface 6a, a fifth interface 6b and a sixth interface 6c, wherein the fourth interface 6a is communicated with the bottom of the chloroethylene converter 1, the fifth interface 6b is communicated with the filter 3, and the sixth interface 6c is communicated with the main exhaust pipeline 7.
The utility model also comprises a DCS control system 8, wherein the DCS control system 8 is respectively and electrically communicated with the temperature sensor 2, the first three-way switching valve 4 and the second three-way switching valve 6.
The utility model can utilize the premise of 'top inlet and bottom outlet' pipeline of the mixed gas of the original chloroethylene converter to the maximum extent, and the operation process is as follows: when the vinyl chloride converter 1 is a new catalyst, the mixed gas from the main gas inlet pipeline 5 enters the vinyl chloride converter 1 through the first three-way switching valve 4 (the third interface 4c enters and the first interface 4a exits at this time) to start a reaction, after the reaction is finished, the mixed gas enters the main gas outlet pipeline 7 through the bottom gas outlet and the second three-way switching valve 6 (the fourth interface 6a enters and the sixth interface 6c exits at this time), after the reaction is finished, the temperature sensor 2 feeds back the temperature signal to the DCS control system 8 in real time, when the temperature signal reaches 145 ℃ and is reduced to 135 ℃, the DCS control system 8 automatically sends an instruction to the first three-way switching valve 4 and the second three-way switching valve 6 to finish the switching of the inlet and the outlet of the valves, namely the gas inlet of the first three-way switching valve 4 is still the third interface 4c, the gas outlet is changed from the first interface 4a to the second interface 4b, and the gas inlet of the second three-way switching valve 6 is changed from the fourth interface 6a to the fifth interface 6b, the outlet is still the sixth interface 6c, after the reaction is finished, the reaction enters the filter 3 through the top interface of the chloroethylene converter 1 for filtering, and then enters the main exhaust pipeline 7, so that the switching of the air inlet and the air outlet of the chloroethylene converter is realized, and the operation is finished.
Claims (2)
1. A catalyst replacing device for a vinyl chloride converter is characterized by comprising the vinyl chloride converter, the chloroethylene converter is provided with a temperature sensor, the top of the chloroethylene converter is respectively communicated with the filter and the first three-way switching valve through pipelines, the first three-way switching valve is provided with a first interface, a second interface and a third interface, the first interface is communicated with the top of the chloroethylene converter, the second interface is communicated with the bottom of the chloroethylene converter, the third interface is communicated with the total air inlet pipeline, the bottom of the chloroethylene converter is provided with a second three-way switching valve which is provided with a fourth interface, a fifth interface and a sixth interface, the fourth interface is communicated with the bottom of the chloroethylene converter, the fifth interface is communicated with the filter, and the sixth interface is communicated with the main exhaust pipeline.
2. The catalyst replacement device of claim 1, further comprising a DCS control system, wherein the DCS control system is electrically connected to the temperature sensor, the first three-way switching valve and the second three-way switching valve respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122222341.1U CN215842886U (en) | 2021-09-14 | 2021-09-14 | Catalyst replacing device for vinyl chloride converter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122222341.1U CN215842886U (en) | 2021-09-14 | 2021-09-14 | Catalyst replacing device for vinyl chloride converter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215842886U true CN215842886U (en) | 2022-02-18 |
Family
ID=80320250
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122222341.1U Active CN215842886U (en) | 2021-09-14 | 2021-09-14 | Catalyst replacing device for vinyl chloride converter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215842886U (en) |
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2021
- 2021-09-14 CN CN202122222341.1U patent/CN215842886U/en active Active
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