CN202898271U - Propane concentration reducing system of polypropylene production equipment - Google Patents
Propane concentration reducing system of polypropylene production equipment Download PDFInfo
- Publication number
- CN202898271U CN202898271U CN 201220547402 CN201220547402U CN202898271U CN 202898271 U CN202898271 U CN 202898271U CN 201220547402 CN201220547402 CN 201220547402 CN 201220547402 U CN201220547402 U CN 201220547402U CN 202898271 U CN202898271 U CN 202898271U
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- propane
- propylene
- rectifying tower
- tower
- pipeline
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Abstract
The utility model discloses a propane concentration reducing system of polypropylene production equipment and belongs to the technical field of fine chemical engineering equipment. The propane concentration reducing system comprises a buffer tank, wherein the buffer tank is in pipeline connection with a circulating propylene auto-polymerization reactor and a circulating pump; the circulating pump is divided to two paths, with one path leading into a polymerization reactor and the other path leading into a fractionating tower; the bottom of the fractionating tower is provided with a reboiler; the top of the fractionating tower is in pipeline connection with the buffer tank; and the bottom of the fractionating tower is in pipeline connection with a propane recycling tank. Circulating propylene is tapped out of the buffer tank by the circulating pump, propylene is fractionated from propane by the fractionating tower, the propylene enters the top of the tower, while the propane enters the bottom of the tower, so that the propylene and the propane are separated from each other. The propylene re-enters the buffer tank for cyclic utilization, while the propane is discharged into a propane collecting tank. Therefore, the concentration of the propane in a whole reaction system is stabilized at a lower level; and the waste of the propylene is avoided, without massive propylene discharge for keeping the concentration of the propylene in the reaction system. The propane concentration reducing system has the advantages of short process, low operation cost and the like and is suitable for popularization and application in industrial production.
Description
Technical field
The utility model belongs to fine chemistry industry purifying plant technical field, is specifically related to that a kind of flow process is short, running cost is low, refining effect is good, is beneficial in the polypropylene production process of polypropylene reaction and is used for reducing system's propane concentration.
Background technology
On PP Production Technology, can there be a certain amount of propane inside the propylene as circulation usefulness, when cycle index was many, propane concentration can increase, and can affect polyacrylic reaction when propane concentration is too high, thereby reduce yield and output.Cause the increase of various unit consumption, energy consumption.General way is to contain the propylene discharging of a small amount of propane, to use as liquefied gas, to have improved like this cost at present, and causes the utilization ratio of propylene to reduce, and increases the propylene unit consumption.
The utility model content
For the above-mentioned problems in the prior art, the polypropylene production process that the purpose of this utility model is to provide that a kind of flow process is short, running cost is low, refining effect is good, be beneficial to the polypropylene reaction is used for reducing propane concentration.
Described a kind of polypropylene production is used for reducing the system of propane concentration, comprise the surge tank that is connected with circulation propylene auto-polymerization pipe reactor, surge tank is connected with circulating pump pipeline, it is characterized in that described recycle pump divides two-way, one the tunnel is connected with the polymerized unit pipe reactor, and another road is connected with the rectifying tower pipeline, and described rectifier bottoms is equipped with reboiler, the rectifying tower cat head is connected with the surge tank pipeline, is connected with propane recovery tank pipeline at the bottom of the rectifying tower.
Described a kind of polypropylene production is used for reducing the system of propane concentration, it is characterized in that being equipped with respectively on the pipeline between recycle pump and polymerized unit reactor and the rectifying tower flow director for the control flow.
Described a kind of polypropylene production is used for reducing the system of propane concentration, it is characterized in that being equipped with flow director on the pipeline between rectifying tower cat head and the surge tank.
Described a kind of polypropylene production is used for reducing the system of propane concentration, it is characterized in that rectifying tower body of the tower middle part is equipped with for the fluid level controller of measuring the propane liquid level.
Described a kind of polypropylene production is used for reducing the system of propane concentration, it is characterized in that rectifying tower body of the tower middle part is equipped with for the temperature regulator of surveying temperature inside rectifying tower.
Above-mentioned a kind of polypropylene production is used for reducing the system of propane concentration, comprise the surge tank that is connected with circulation propylene auto-polymerization pipe reactor, surge tank is connected with circulating pump pipeline, described recycle pump divides two-way, one the tunnel is connected with the polymerized unit pipe reactor, and another road is connected with the rectifying tower pipeline, and described rectifier bottoms is equipped with recirculation heater, the rectifying tower cat head is connected with the surge tank pipeline, is connected with propane recovery tank pipeline at the bottom of the rectifying tower.The utility model utilizes recycle pump that the circulation propylene in the surge tank is got, pass in the rectifying tower through the recirculation heater heating, propylene and propane rectifying are separated, because propylene density is low, enters cat head, the propane that density is high enters at the bottom of the tower, reach separately, in order to increase operation rate, propylene enters again recycle in the surge tank, and propane enters in the propane holding tank.Propylene purification system of the present utility model, have flow process short, be operable at the bottom of body, the tower in the propane that propylene is low, the few advantage of propane in the cat head propylene, be suitable for applying in the industrial production.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Among the figure: 1-fluid level controller, 2-surge tank, 3-recycle pump, 4-flow director, 5-reboiler, 6-temperature regulator, 7-rectifying tower.
Embodiment
The utility model will be further described below in conjunction with Figure of description:
Owing to have a certain amount of propane in the propylene, in the recycle process, the concentration of propane can strengthen, be not directly used in the preparation polypropylene if do not process, not only affect speed of reaction, also reduce productive rate, also have the propylene that propane concentration is high to discharge at present, be used as liquefied gas usefulness, also improved so to a certain extent cost.For this problem, the utility model provides a kind of system that is used for reducing propane concentration.
As shown in Figure 1, a kind of polypropylene production is used for reducing the system of propane concentration, comprise surge tank 2, the entrance of surge tank 2 is connected with circulation propylene auto-polymerization reactor outlet pipeline, surge tank 2 outlets are connected with recycle pump 3 pipelines, recycle pump 3 outlet minute two-way, one the tunnel is connected with the polymerized unit pipe reactor, another road is connected with rectifying tower 7 pipelines, described rectifying tower 7 bottoms are equipped with reboiler 5, rectifying tower 7 cats head are connected with surge tank 2 pipelines, are connected with propane recovery tank pipeline at the bottom of rectifying tower 7 towers.
Use principle of the present utility model: after propylene enters surge tank 2 from circulation propylene auto-polymerization reactor, got by recycle pump 3, through after the recycle pump 3,3 minutes two-way of recycle pump, one the tunnel removes the polymerized unit direct reaction, another road is sent into the gas mixture of propylene and propane in the rectifying tower 7, by being arranged on reboiler 5 heating on the rectifying tower 7, the circulation fluid in the reboiler 5 is hot water, the waste-heat that this hot water can utilize other reactions to arrange, energy-conservation, rectifying tower 7 bodies of the tower middle part is equipped with for the temperature regulator 6 of surveying temperature inside rectifying tower, is convenient to observe the temperature in the rectifying tower 7, immediately controls temperature, make propylene and propane effective separation, because propylene density ratio propane is low, so propylene enters surge tank 2 internal recycle utilizations again from the outflow of rectifying tower 7 cats head, propane goes out from rectifying tower 7 tower bottom flows, enters the propane recovery tank and collects.For the ease of reaction and purification, be equipped with respectively the flow director 4 for the control flow on the pipeline between recycle pump 3 and polymerized unit reactor, recycle pump 3 and rectifying tower 7, rectifying tower 7 cats head and the surge tank 2, according to practical situation, the flow that control is actual.
Claims (5)
1. a polypropylene production is used for reducing the system of propane concentration, comprise the surge tank (2) that is connected with circulation propylene auto-polymerization pipe reactor, surge tank (2) is connected with recycle pump (3) pipeline, it is characterized in that described recycle pump (3) minute two-way, one the tunnel is connected with the polymerized unit pipe reactor, another road is connected with rectifying tower (7) pipeline, described rectifying tower (7) bottom is equipped with reboiler (5), rectifying tower (7) cat head is connected with surge tank (2) pipeline, is connected with propane recovery tank pipeline at the bottom of rectifying tower (7) tower.
2. a kind of polypropylene production according to claim 1 is used for reducing the system of propane concentration, it is characterized in that recycle pump (3) and polymerized unit reactor, and rectifying tower (7) between pipeline on be equipped with respectively for control flow flow director (4).
3. a kind of polypropylene production according to claim 1 is used for reducing the system of propane concentration, it is characterized in that being equipped with flow director (4) on the pipeline between rectifying tower (7) cat head and the surge tank (2).
4. a kind of polypropylene production according to claim 1 is used for reducing the system of propane concentration, it is characterized in that rectifying tower (7) body of the tower middle part is equipped with for the fluid level controller (1) of measuring the propane liquid level.
5. a kind of polypropylene production according to claim 1 is used for reducing the system of propane concentration, it is characterized in that rectifying tower (7) body of the tower middle part is equipped with for the temperature regulator (6) of surveying temperature inside rectifying tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220547402 CN202898271U (en) | 2012-10-24 | 2012-10-24 | Propane concentration reducing system of polypropylene production equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220547402 CN202898271U (en) | 2012-10-24 | 2012-10-24 | Propane concentration reducing system of polypropylene production equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202898271U true CN202898271U (en) | 2013-04-24 |
Family
ID=48118963
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220547402 Expired - Lifetime CN202898271U (en) | 2012-10-24 | 2012-10-24 | Propane concentration reducing system of polypropylene production equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202898271U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112979845A (en) * | 2021-02-09 | 2021-06-18 | 河北海航石化新型材料有限公司 | Method and device for producing special grade electrical grade polypropylene |
-
2012
- 2012-10-24 CN CN 201220547402 patent/CN202898271U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112979845A (en) * | 2021-02-09 | 2021-06-18 | 河北海航石化新型材料有限公司 | Method and device for producing special grade electrical grade polypropylene |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address | ||
| CP03 | Change of name, title or address |
Address after: Room 305, No. 305, No. 365, Dongfang Road, Port District, Zhejiang, Zhejiang Patentee after: Hongji Formosa Petrochemical Co. Zhejiang Address before: 314201 Binhai Road, Jiaxing Port District, Jiaxing, Zhejiang Province, No. 2155 Patentee before: ZHEJIANG HONGJI PETROCHEMICAL Co.,Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130424 |