CN113956380B - Carrier gas distribution, treatment and polymerization system for polyolefin production process - Google Patents
Carrier gas distribution, treatment and polymerization system for polyolefin production process Download PDFInfo
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- CN113956380B CN113956380B CN202111142833.8A CN202111142833A CN113956380B CN 113956380 B CN113956380 B CN 113956380B CN 202111142833 A CN202111142833 A CN 202111142833A CN 113956380 B CN113956380 B CN 113956380B
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- C08F—MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
- C08F10/00—Homopolymers and copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond
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Abstract
The invention belongs to the field of polyolefin technology, and discloses a carrier gas distribution, treatment and polymerization reaction system for polyolefin production technology, wherein the carrier gas distribution system comprises: the carrier gas pressurizing assemblies are arranged in a plurality of polyolefin production lines in a one-to-one correspondence manner, each carrier gas pressurizing assembly comprises at least one carrier gas input port and at least one carrier gas output port, and in the carrier gas distribution system, each carrier gas input port comprises a high-pressure carrier gas input port and a low-pressure carrier gas input port which are different in input air pressure and positioned in different polyolefin production lines; and the carrier gas partial pressure pipeline (5) is communicated with the high-pressure carrier gas input port and the low-pressure carrier gas input port so as to be capable of splitting part of carrier gas to be input into the high-pressure carrier gas input port to the low-pressure carrier gas input port. Therefore, the invention can realize the efficient distribution and recycling of the carrier gas through simple technical transformation so as to reduce the energy consumption of the system and improve the recycling rate of the carrier gas.
Description
Technical Field
The invention relates to the field of polyolefin technology, in particular to a carrier gas distribution system, a carrier gas treatment system and a polymerization reaction system for polyolefin production technology.
Background
In polypropylene production, the carrier gas separation system is used for treating unreacted raw material gas carried in powder materials at the outlet of a polymerization reactor, such as: propylene, propane, hydrogen, ethylene, etc., and this unreacted feed gas is referred to as a carrier gas. The carrier gas at the outlet of the reactor is sent to a carrier gas separation tower after being pressurized by a carrier gas compressor, in the original design, the carrier gas separation tower is a plate type rectifying tower, the volatile light components are separated from the heavy components by utilizing the rectification principle, the separated light components and part of heavy components are sent out of an upstream device of a boundary zone for recycling, and most of the heavy components need to be recycled to the polymerization reactor to participate in polymerization reaction.
But the recycled component fed back to the upstream unit increases the energy consumption of the unit on the one hand and affects the utilization of the component ethylene on the other hand. In actual production, when the polymerization reactor is loaded for production, the gas carrying capacity is increased, and the whole carrier gas separation system is overloaded for operation, so that the safe operation of the carrier gas compressor and the separation effect of the carrier gas separation tower are finally affected. Taking Novolen polypropylene process as an example, the process has two production lines and four polymerization reactors, wherein one line of the two polymerization reactors is operated in series, so that a homo-polymerization and anti-impact copolymerization product can be produced, and the two lines of the two polymerization reactors are operated in parallel, so that a homo-polymerization and random copolymerization product can be produced. When the carrier gas is separated, the carrier gas output from the reactor is compressed by the reciprocating compressor in three stages, and is sent to the carrier gas separating tank to separate the gas phase after being pressurized, and then sent to the carrier gas separating tower to separate the light component and the heavy component. When the carrier gas volume exceeds the design value of system treatment, the three-stage inlet pressure of the carrier gas compressor is higher, the risk of the jump of a safety valve exists, and the overload operation of the carrier gas separation tower seriously affects the separation of light components, the separation of the light components can not meet the recycling requirement of an upstream device, and the waste of effective components and the energy consumption of the system are caused.
At present, in order to protect the stable operation of the compressor, a mode of discharging a torch is generally adopted to control the pressure, so that the interlocking jump of a safety valve caused by the high pressure is avoided, and in order to control the pressure of a carrier gas tower, a mode of discharging the torch is generally adopted to maintain the pressure of the tower, but the operation adjustment tends to cause the loss of materials and increase the unit consumption of the device.
Disclosure of Invention
In order to overcome at least one of the defects or shortcomings in the prior art, the invention provides a carrier gas distribution system, a carrier gas treatment system and a polymerization reaction system for polyolefin production technology, which can realize efficient carrier gas distribution and recycling through simple technical transformation so as to reduce system energy consumption, improve carrier gas recycling rate and achieve the aim of optimizing process flow.
To achieve the above object, a first aspect of the present invention provides a carrier gas distribution system for polyolefin production process, comprising:
the carrier gas pressurizing assemblies are arranged in a plurality of polyolefin production lines in a one-to-one correspondence manner, each carrier gas pressurizing assembly comprises at least one carrier gas input port and at least one carrier gas output port, and in the carrier gas distribution system, each carrier gas input port comprises a high-pressure carrier gas input port and a low-pressure carrier gas input port which are different in input air pressure and positioned in different polyolefin production lines;
and the carrier gas partial pressure pipeline is communicated with the high-pressure carrier gas input port and the low-pressure carrier gas input port so as to split partial carrier gas to be input into the high-pressure carrier gas input port to the low-pressure carrier gas input port.
Optionally, each carrier gas pressurizing assembly includes a plurality of carrier gas pressurizing unit groups that connect gradually, each carrier gas pressurizing unit group includes one carrier gas input port and one carrier gas output port.
Optionally, the high-pressure gas inlet is formed in the carrier gas pressurizing unit group at the most downstream of the respective polyolefin production line, and the low-pressure gas inlet is formed in the carrier gas pressurizing unit group at the most upstream of the respective other polyolefin production line.
Optionally, two carrier gas pressurizing assemblies are provided, and three carrier gas pressurizing unit groups in each carrier gas pressurizing assembly are provided.
Optionally, each carrier gas pressurization assembly includes buffer tank, carrier gas input pipeline, carrier gas compressor and the carrier gas output pipeline that sets up and connect gradually, the carrier gas compressor be equipped with carrier gas input pipeline connection carrier gas input and with carrier gas output pipeline connection carrier gas delivery outlet, carrier gas partial pressure pipeline's one end be connected to with the carrier gas input pipeline of high pressure carrier gas input intercommunication, the other end be connected to with the buffer tank of low pressure carrier gas input intercommunication.
Optionally, the carrier gas distribution system includes a controller and a pressure sensor, the carrier gas partial pressure pipeline is provided with a switch valve, the pressure sensor is configured to detect real-time input air pressure at the high-pressure carrier gas input port, the controller is in communication with the pressure sensor and the switch valve, and the controller is configured to control the switch valve to be opened when the real-time input air pressure exceeds a preset safety threshold.
Optionally, a one-way valve is arranged in the carrier gas partial pressure pipeline.
Optionally, the carrier gas distribution system comprises:
and the upstream end of the carrier gas recovery pipeline is communicated with the carrier gas output port positioned at the most downstream of the carrier gas pressurizing assembly, and the downstream end of the carrier gas recovery pipeline can be connected with a circulating gas system in the polyolefin production line.
Optionally, the downstream end of the carrier gas recovery line is adapted for bypass connection with a recycle gas return line in the recycle gas system.
Optionally, a shower guide valve is arranged in the carrier gas recovery pipeline.
In a second aspect the present invention provides a carrier gas treatment system for a polyolefin production process, the carrier gas treatment system comprising a carrier gas distribution system as described above for a polyolefin production process.
In a third aspect the present invention provides a polymerization system for a polyolefin production process, the polymerization system comprising a recycle gas system and a carrier gas treatment system as described above for a polyolefin production process.
According to the technical scheme, at least the distribution utilization mode of the carrier gas in the polyolefin production process can be optimized, when the carrier gas quantity exceeds the design value of system treatment, the pressure at the carrier gas input port of the carrier gas pressurizing assembly in part of the polyolefin production line is overlarge, namely, a high-pressure carrier gas input port is formed, low-pressure carrier gas input ports smaller than the pressure at the high-pressure carrier gas input port exist in the carrier gas pressurizing assembly of the rest polyolefin production line, at the moment, part of carrier gas at the high-pressure carrier gas input port can be shunted to low-pressure carrier gas input ports in another polyolefin production line or a plurality of polyolefin production lines through the carrier gas partial pressure pipeline, so that the safety valve of the carrier gas pressurizing assembly is prevented from tripping, the stable operation of the carrier gas pressurizing assembly is ensured, and the waste of effective components and the energy loss of the system caused by overload operation of the carrier gas separating tower are avoided.
Additional features and advantages of the invention will be set forth in the detailed description which follows.
Drawings
The accompanying drawings are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate the invention and together with the description serve to explain, without limitation, the invention. In the drawings:
FIG. 1 is a schematic view showing a partial structure of a polymerization system according to an embodiment of the present invention.
Reference numerals illustrate:
1. one-line one-section buffer tank 2 one-line one-section carrier gas compressor
3. Two-line three-section buffer tank 4 two-line three-section carrier gas compressor
5. Carrier gas recovery pipeline of carrier gas partial pressure pipeline 6
7. Carrier gas separating tower with shower guide valve 8
9. Cooler for circulating gas return pipeline 10
11. Circulating gas compressor
Detailed Description
The following describes the detailed implementation of the embodiments of the present invention with reference to the drawings. It should be understood that the detailed description and specific examples, while indicating and illustrating the invention, are not intended to limit the invention.
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other.
In the embodiments of the present invention, unless otherwise indicated, terms of orientation such as "upper, lower, top, bottom" or "upper, lower, top, bottom" are used generally with respect to the orientation shown in the drawings or with respect to the positional relationship of the various components with respect to one another in the vertical, vertical or gravitational directions.
The invention will be described in detail below with reference to the drawings in connection with exemplary embodiments.
It should be noted that the polymerization system for polyolefin production process of the present invention includes at least two polyolefin production lines, and each of the polyolefin production lines may be operated independently of each other or may be structurally related. For a single polyolefin production line, it includes a recycle gas system including a polymerization reactor or the like and a carrier gas treatment system including a carrier gas distribution system, a carrier gas separation column, and the like.
During production, the circulating gas system is used for actually producing polyolefin, and the polymerization reactor outputs carrier gas which does not participate in reaction to the carrier gas treatment system for further treatment in the production process. The carrier gas separating tower is usually a plate type rectifying tower, volatile light components can be separated from heavy components by utilizing a rectification principle, the separated light components and part of heavy components are sent to an upstream device of a boundary zone for recycling, and the rest of the heavy components are recycled to the polymerization reactor to continuously participate in the polymerization reaction.
The core of the invention is the associated arrangement between different polyolefin production lines.
As shown in fig. 1, a first exemplary embodiment of the present invention is to provide a carrier gas distribution system for polyolefin production process, which mainly includes a plurality of carrier gas pressurizing assemblies and a carrier gas partial pressure line 5.
The carrier gas pressurizing assemblies are arranged in the polyolefin production lines in a one-to-one correspondence mode, namely, in actual production, one carrier gas pressurizing assembly is arranged in each polyolefin production line. Each carrier gas pressurizing assembly comprises at least one carrier gas input port and at least one carrier gas output port, for example, when only one carrier gas pressurizing unit group is arranged in the carrier gas pressurizing assembly, the carrier gas pressurizing unit group is provided with one carrier gas input port and one carrier gas output port, so that the number of the carrier gas input ports and the carrier gas output ports in the assembly is one; when the carrier gas pressurizing assembly is provided with a plurality of carrier gas pressurizing unit groups which are sequentially connected in series, each carrier gas pressurizing unit group is provided with a carrier gas input port and a carrier gas output port, and the carrier gas output port of the carrier gas pressurizing unit group positioned at the upstream is communicated with the carrier gas input port of the carrier gas pressurizing unit group positioned at the adjacent downstream, and the carrier gas input port and the carrier gas output port in the assembly are multiple.
When the carrier gas quantity exceeds the design value of system treatment and the pressure at the carrier gas inlet of the carrier gas pressurizing assembly in part of polyolefin production lines is overlarge, namely a high-pressure carrier gas inlet is formed, the carrier gas pressurizing assembly of the rest polyolefin production lines has a low-pressure carrier gas inlet with smaller pressure than the high-pressure carrier gas inlet. In other words, in the carrier gas distribution system, the carrier gas input port includes a high-pressure carrier gas input port and a low-pressure carrier gas input port that are different in input gas pressure and located in different polyolefin production lines.
At this time, the carrier gas partial pressure pipeline 5 is arranged in the carrier gas distribution system to be communicated with the high-pressure carrier gas input port and the low-pressure carrier gas input port, so that part of carrier gas to be input into the high-pressure carrier gas input port can be split into the low-pressure carrier gas input ports in another polyolefin production line or a plurality of polyolefin production lines, the safety valve of the carrier gas pressurizing assembly is prevented from being tripped, the stable operation of the carrier gas pressurizing assembly is ensured, and the waste of effective components and the energy loss of the system caused by overload operation of the carrier gas separating tower 8 are avoided.
In an alternative or preferred embodiment, the carrier gas pressurizing assembly of each polyolefin production line comprises a plurality of carrier gas pressurizing unit groups connected in sequence, each carrier gas pressurizing unit group comprises a carrier gas input port and a carrier gas output port, at this time, the carrier gas output port of the carrier gas pressurizing unit group positioned at the upstream is communicated with the carrier gas input port of the carrier gas pressurizing unit group positioned adjacent at the downstream, and the air pressure of the carrier gas is gradually increased in the process of sequentially flowing through the plurality of carrier gas pressurizing unit groups, namely, multistage pressure boosting is realized. It is thus envisioned that the high pressure gas inlet port will typically be formed in a relatively downstream group of carrier gas pressurizing units of one or more polyolefin production lines, while the low pressure gas inlet port will typically be formed in a relatively upstream group of carrier gas pressurizing units of the remaining polyolefin production lines.
In general, in a polyolefin production line, the probability of forming a high-pressure carrier gas inlet in a carrier gas pressurizing unit group located at the most downstream is high, and in order to ensure the split pressure release effect of the carrier gas, a low-pressure carrier gas inlet may be disposed in the carrier gas pressurizing unit group located at the most upstream of the corresponding other polyolefin production line. That is, when the carrier gas partial pressure line 5 is provided specifically, the two carrier gas input ports corresponding to the maximum input pressure difference are communicated through the carrier gas partial pressure line 5.
In an alternative or preferred embodiment, the carrier gas pressurizing unit group in each carrier gas pressurizing assembly comprises a buffer tank, a carrier gas input pipeline, a carrier gas compressor and a carrier gas output pipeline which are arranged in groups and are connected in sequence. At this time, the carrier gas is pressurized by the carrier gas compressor, the input port and the output port of the carrier gas compressor are respectively formed into the carrier gas input port and the carrier gas output port, the carrier gas input port is connected with the carrier gas input pipeline, and the carrier gas output port is connected with the carrier gas output pipeline. With this structure, as shown in fig. 1, one end of the carrier gas dividing line 5 may be connected to a carrier gas input line communicating with the high-pressure carrier gas input port, and the other end of the carrier gas dividing line 5 may be connected to a buffer tank communicating with the low-pressure carrier gas input port.
In an alternative or preferred embodiment, the timing of the split pressure relief of the carrier gas is controlled more precisely. Specifically, a controller and an air pressure sensor are provided in the carrier gas distribution system, and an on-off valve is provided in the carrier gas partial pressure line 5 to control on-off of the carrier gas partial pressure line 5. The air pressure sensor is configured to detect a real-time input air pressure at the high-pressure carrier gas input port, the controller is in communication with the air pressure sensor and the on-off valve, and the controller is further configured to control the on-off valve to open to perform split pressure relief of the carrier gas when the real-time input air pressure at the high-pressure carrier gas input port exceeds a preset safety threshold. When the air pressure sensor detects that the real-time input air pressure at the high-pressure air inlet does not exceed the preset safety threshold, the controller temporarily does not act, the switch valve is closed at the moment, and the carrier air at the high-pressure air inlet temporarily cannot be shunted to the low-pressure air inlet through the carrier air partial pressure pipeline 5. Obviously, when the real-time input air pressure at the high-pressure air inlet exceeds the preset safety threshold, the air carrier amount exceeds the maximum design value which can be processed by the system.
In an alternative or preferred embodiment, the control of the on-off state of the carrier gas partial pressure line 5 can be simplified and it can be ensured that the gas pressure at the high-pressure carrier gas inlet does not rise further. Specifically, a one-way valve can be arranged in the carrier gas partial pressure pipeline 5, and the one-way valve is always closed when the carrier gas quantity does not exceed the maximum design value which can be processed by the system, once the carrier gas quantity exceeds the maximum design value which can be processed by the system, the one-way valve can be opened under the action of air pressure, so that part of carrier gas can realize one-way flow from the high-pressure carrier gas inlet to the low-pressure carrier gas inlet through the carrier gas partial pressure pipeline 5.
On the other hand, it is known from the foregoing that, in the working process of the polyolefin production line, the carrier gas meeting the separation requirement is sent to the carrier gas separation tower 8, the carrier gas separation tower 8 generally separates the volatile light component from the heavy component by using the rectification principle, and sends the separated light component and part of the heavy component to the upstream device of the boundary region for recycling, and the rest of the heavy component is recycled to the polymerization reactor for further participation in the polymerization reaction.
However, sending the recycled components increases the energy consumption of the upstream apparatus and the production load of the carrier gas separation column 8. To solve this technical problem, a carrier gas recovery line 6 may be provided in the carrier gas distribution system in the present exemplary embodiment, and the upstream end of the line of the carrier gas recovery line 6 is communicated with a carrier gas output port located at the most downstream of the carrier gas pressurizing assembly, and the downstream end of the line of the carrier gas recovery line 6 can be connected with a circulating gas system in the polyolefin production line, thereby improving the carrier gas recovery rate and reducing the load of the carrier gas separation column 8.
Usually, the circulating gas in the circulating gas system can enter the circulating gas compressor 11 after passing through the circulating gas return pipeline 9 and the cooler 10, but the gas pressure at the cooler 10 is generally 1.9MPa to 2.0MPa, and the output gas pressure of the carrier gas compressor is generally 3.0MPa to 3.5MPa, at this time, the temperature of the carrier gas is higher, and the carrier gas needs to be cooled by the cooler 10, so that the requirement of the circulating gas system can be met.
In an alternative or preferred embodiment, to avoid the above-mentioned air pressure mismatch problem, when the carrier gas recovery line 6 is provided, the downstream end of the line may be connected to the bypass of the circulating gas return line 9 in the circulating gas system, and the carrier gas in the carrier gas recovery line 6 is introduced into the cooler 10 after being converged with the circulating gas in the circulating gas return line 9, so that the practicability of the carrier gas recovery line 6 can be improved.
In an alternative or preferred embodiment, a shower valve 7 may be provided in the carrier gas recovery line 6 for sampling the carrier gas for analysis or for line process delivery (e.g., blowdown, line cleaning, etc.).
The carrier gas distribution system of the present exemplary embodiment is suitable for use in current Novolen polypropylene production processes. Specifically, the process has two production lines and four polymerization reactors, wherein one line of the two polymerization reactors is operated in series, so that a homo-polymerization product and an impact copolymerization product can be produced, and the two lines of the two polymerization reactors are operated in parallel, so that a homo-polymerization product and a random copolymerization product can be produced.
When the carrier gas distribution system is arranged, referring to fig. 1, one carrier gas pressurizing assembly is arranged in each of the first line and the second line, and three carrier gas pressurizing units in each carrier gas pressurizing assembly are arranged, namely, the carrier gases in the first line and the second line are compressed by three sections, and the carrier gas compressor is specifically used for pressurizing. The first-line first-section carrier gas pressurizing unit group comprises a first-line first-section buffer tank 1 and a first-line first-section carrier gas compressor 2, and the second-line third-section carrier gas pressurizing unit group comprises a second-line third-section buffer tank 3 and a second-line third-section carrier gas compressor 4.
Based on the above-described structure, one end of the carrier gas partial pressure line 5 may be connected to the carrier gas input line between the two-line three-stage buffer tank 3 and the two-line three-stage carrier gas compressor 4, and the other end of the carrier gas partial pressure line 5 may be connected to the one-line one-stage buffer tank 1. Further, one end of the carrier gas recovery line 6 may be connected to a buffer tank between the two-line three-stage carrier gas compressor 4 and the carrier gas separation column 8, and the other end of the carrier gas recovery line 6 may be connected to a bypass of the circulating gas return line 9 in the circulating gas system.
A second exemplary embodiment of the present invention provides a carrier gas treatment system for polyolefin production process, which includes the above-described structure of carrier gas distribution system and carrier gas separation column 8 for polyolefin production process. It is apparent that the carrier gas treatment system of the present exemplary embodiment has all the technical effects brought about by the carrier gas distribution system described above, and thus will not be described in detail herein.
A third exemplary embodiment of the present invention provides a polymerization reaction system for a polyolefin production process, which includes a recycle gas system including a polymerization reactor, a recycle gas return line 9, a cooler 10, and the like, and the carrier gas treatment system for a polyolefin production process described above. Similarly, the polymerization reaction system of the present exemplary embodiment has all the technical effects brought about by the carrier gas treatment system described above, and thus will not be described again here.
In summary, from the viewpoint of process flow optimization, the invention effectively distributes and recycles the materials of the carrier gas system through simple technical transformation, reduces the energy consumption of the system, and increases the recycling amount of the carrier gas of the system.
The foregoing details of the optional implementation of the embodiment of the present invention have been described in detail with reference to the accompanying drawings, but the embodiment of the present invention is not limited to the specific details of the foregoing implementation, and various simple modifications may be made to the technical solution of the embodiment of the present invention within the scope of the technical concept of the embodiment of the present invention, and these simple modifications all fall within the protection scope of the embodiment of the present invention.
In addition, the specific features described in the foregoing embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations are not described further.
In addition, any combination of various embodiments of the present invention may be performed, so long as the concept of the embodiments of the present invention is not violated, and the disclosure of the embodiments of the present invention should also be considered.
Claims (9)
1. A carrier gas distribution system for a polyolefin production process, wherein the carrier gas distribution system comprises:
the carrier gas pressurizing assemblies are arranged in a plurality of polyolefin production lines in a one-to-one correspondence manner, each carrier gas pressurizing assembly comprises at least one carrier gas input port and at least one carrier gas output port, and in the carrier gas distribution system, each carrier gas input port comprises a high-pressure carrier gas input port and a low-pressure carrier gas input port which are different in input air pressure and positioned in different polyolefin production lines;
a carrier gas partial pressure pipeline (5) which communicates the high-pressure carrier gas input port and the low-pressure carrier gas input port so as to be capable of splitting part of carrier gas to be input into the high-pressure carrier gas input port to the low-pressure carrier gas input port;
each carrier gas pressurizing assembly comprises a carrier gas pressurizing unit group, wherein the carrier gas pressurizing unit group comprises a buffer tank, a carrier gas input pipeline, a carrier gas compressor and a carrier gas output pipeline which are arranged in groups and are sequentially connected, the carrier gas compressor is provided with a carrier gas input port connected with the carrier gas input pipeline and a carrier gas output port connected with the carrier gas output pipeline, one end of a carrier gas partial pressure pipeline (5) is connected to the carrier gas input pipeline communicated with the high-pressure carrier gas input port, and the other end of the carrier gas partial pressure pipeline is connected to the buffer tank communicated with the low-pressure carrier gas input port;
the carrier gas distribution system comprises a controller and a gas pressure sensor, wherein a switch valve is arranged in a carrier gas partial pressure pipeline (5), the gas pressure sensor is configured to detect real-time input gas pressure at the high-pressure carrier gas input port, the controller is communicated with the gas pressure sensor and the switch valve, and the controller is configured to control the switch valve to be opened when the real-time input gas pressure exceeds a preset safety threshold; or a one-way valve is arranged in the carrier gas partial pressure pipeline (5).
2. The carrier gas distribution system for polyolefin production process of claim 1, wherein each of the carrier gas pressurizing assemblies comprises a plurality of the carrier gas pressurizing unit groups connected in sequence, each of the carrier gas pressurizing unit groups comprising one of the carrier gas input ports and one of the carrier gas output ports.
3. The carrier gas distribution system for polyolefin production process according to claim 2, wherein the high-pressure carrier gas input port is formed in the carrier gas pressurizing unit group at the most downstream of the respective polyolefin production line, and the low-pressure carrier gas input port is formed in the carrier gas pressurizing unit group at the most upstream of the respective other polyolefin production line.
4. The carrier gas distribution system for polyolefin production process according to claim 2, wherein the carrier gas pressurizing assemblies are provided in two, and the carrier gas pressurizing unit group in each carrier gas pressurizing assembly is provided in three.
5. The carrier gas distribution system for polyolefin production process according to any one of claims 1 to 4, wherein the carrier gas distribution system comprises:
and the upstream end of the carrier gas recovery pipeline (6) is communicated with the carrier gas output port positioned at the most downstream of the carrier gas pressurizing assembly, and the downstream end of the carrier gas recovery pipeline (6) can be connected with a circulating gas system in the polyolefin production line.
6. Carrier gas distribution system for polyolefin production processes according to claim 5, wherein the conduit downstream end of the carrier gas recovery conduit (6) is for bypass connection with a recycle gas return conduit (9) in the recycle gas system.
7. Carrier gas distribution system for polyolefin production processes according to claim 5, wherein a shower guide valve (7) is provided in the carrier gas recovery line (6).
8. A carrier gas treatment system for a polyolefin production process, wherein the carrier gas treatment system comprises a carrier gas distribution system for a polyolefin production process according to any of claims 1 to 7.
9. A polymerization reaction system for a polyolefin production process, wherein the polymerization reaction system comprises a recycle gas system and the carrier gas treatment system for a polyolefin production process of claim 8.
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| US9631035B2 (en) * | 2013-12-04 | 2017-04-25 | Basell Polyolefine Gmbh | Process for separating components of a reaction mixture obtained by high-pressure polymerization of ethylenically unsaturated monomers |
| CN106749814A (en) * | 2016-11-25 | 2017-05-31 | 联泓新材料有限公司 | One kind coating level ethylene vinyl acetate copolymer and its production technology |
| CN107090054A (en) * | 2017-05-05 | 2017-08-25 | 山东里德工程技术有限公司 | High isotactic ternary polymerization polybutene material body polymerization production device |
| CN107991379A (en) * | 2018-01-25 | 2018-05-04 | 清华大学 | The gas circuit flow-monitoring device and method of ionic migration spectrometer |
| CN212532823U (en) * | 2020-06-09 | 2021-02-12 | 国家能源集团宁夏煤业有限责任公司 | Production device of ternary copolymerized polypropylene |
| CN113357122A (en) * | 2021-05-28 | 2021-09-07 | 华亭煤业集团有限责任公司 | Method for optimizing sealing of gas-loaded compressor in olefin polymerization device |
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