CN101724109B - Device of catalyst feed pipeline for olefin polymerization process - Google Patents
Device of catalyst feed pipeline for olefin polymerization process Download PDFInfo
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- CN101724109B CN101724109B CN 200810225198 CN200810225198A CN101724109B CN 101724109 B CN101724109 B CN 101724109B CN 200810225198 CN200810225198 CN 200810225198 CN 200810225198 A CN200810225198 A CN 200810225198A CN 101724109 B CN101724109 B CN 101724109B
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Abstract
The invention relates to a device of a catalyst feed pipeline for the polymerization process of a gas phase olefin fluidized bed, and the device can move a catalyst out of the feed pipeline or load the catalyst into the feed pipeline with the pressure, thereby solving the problem of blockage of the catalyst feed pipeline in an on-line manner. The set of the simple device can move the catalyst pipeline out of a polymerization reactor or load the catalyst pipeline into the polymerization reactor with the pressure under the state of introducing inert gas for protection.
Description
Technical field
The present invention relates to a kind of catalyst feed pipeline device that is used for olefin polymetiation process, this device can be realized online shifting out or the catalyst feed pipeline of packing into, online solution catalyst feed pipeline blocking problem, this device is specially adapted in the gas-phase polyolefin fluidized bed polymerization process.
Technical background
At industrialized vapor phase process polyolefin polymerization process, in for example poly fluidized bed polymerization process, the charging of catalyzer has dual mode usually, and promptly with the solid form charging, the feeding unit of catalyzer in polymerization technique as shown in Figure 2 with the form charging of slurries or catalyzer for catalyzer.It mainly is made up of parts such as intubate 1, sleeve pipe 2, mariages head 3, threeway 5, lock packing 6, sealing gland 7, catalyst transport pump 17, catalyzer storage tanks 18.Intubate 1 is a successive pipe, and passes 2,3,5,6,7.Sleeve pipe 2 is used to support intubate 1 and links to each other in wall of reactor.Mariages head 3 one ends are connected with reactor, and the other end is connected with threeway 5.Fill lock packing 6 at threeway 5 one ends, adjust the degree of tightness of lock packing 6 by rotary seal gland 7.Catalyst transport pump 17 is squeezed into intubate 1 with the catalyzer in the catalyzer storage tank 18, and catalyzer enters reactor along intubate 1.
No matter catalyzer charging in which way, all to introduce ethylene gas (seeing accompanying drawing 2 for details) at threeway 5 places, this ethylene gas enters reactor along the path that forms between intubate 1 and 5,3, the 2 several parts, and the effect of introducing ethylene gas is the catalyzer from intubate 1 inflow reactor to be dispelled come.For large-scale full scale plant, because the diameter of intubate 1 is bigger, stopping state is uncommon.But for small-sized gas-phase polythene fluidizer, testing apparatus such as pilot scale, because the diameter of the transfer line (intubate 1) of catalyzer is smaller, catalyzer can accumulate gradually at tube wall and end, and blockage problem takes place the one section pipeline that causes intubate 1 to be positioned at inside reactor easily.In case stopping state takes place, and under the situation without any sfgd., can not have under the situation of pressure at reactor, and intubate 1 is shifted out reactor, carries out block clearing or replacing.Have only temporary stoppage just can carry out operations such as block clearing, can cause the parking of whole service device thus.
Therefore, being starved of provides a kind of catalyst feed pipeline device that is used for olefin polymetiation process, this device can onlinely shift out or the catalyst feed pipeline of packing into, online solution catalyst feed pipeline blocking problem, when the catalyzer pipeline is that intubate 1 is when stopping state occurring, under the situation of not stopping, can safe and convenient ground intubate 1 be shifted out reactor, and the reactor of packing into.
Summary of the invention
At the defective that exists in the existing gas-phase fluidized bed olefin polymetiation process, the invention provides a kind of catalyst feed pipeline device that is used for olefin polymetiation process, this device can be realized online shifting out or the catalyst feed pipeline of packing into, thereby the online catalyst feed pipeline blocking problem that solved, this device is by the improvement to existing catalyst feed pipeline, increase by a cover supplementary unit, in case when being positioned at one section catalyst feed pipeline generation obstruction of inside reactor, can be under the situation of not stopping, safe and convenient ground shifts out reactor with the feeding pipe (intubate-1) of catalyzer, and the reactor of packing into.
The catalyst feed pipeline device that is used for olefin polymetiation process involved in the present invention, it mainly comprises with lower member: intubate 1, sleeve pipe 2, mariages head 3, ball valve 4, threeway 5, lock packing 6, sealing gland 7, back tightening nut 8, jackscrew 9, rail brackets 10, displacement nut 11, intubate pipe collar 12, intubate support 13 guide rails 14, steady brace 15;
Wherein intubate 1 is a catalyst feed pipeline; sleeve pipe 2 is connected with the form of mariages head 3 with screw thread; sleeve pipe 2 plays a part to support and protection intubate 1; mariages head 3 is fixed on the reactor by screw thread; mariages head 3 links to each other with ball valve 4; ball valve 4 links to each other with threeway 5, and ball valve 4 plays a part to cut off the gas of inside reactor to external leakage after intubate 1 is being shifted out reactor.
An outlet in threeway 5 is provided with a sealing gland 7, also needs lock packing 6 in order to guarantee stopping property.Sealing back tightening nut 8 is fastened on rail brackets 10 on the sealing gland 7.
Jackscrew 9 is fastened on guide rail 14 on the rail brackets 10 loosening to prevent it, and the quantity of guide rail 14 is many, is preferably more than two or two.Intubate pipe collar 12 is held tightly with intubate 1, and intubate support 13 is sandwiched in wherein, and intubate support 13 can be guide rail 14 cofree horizontally slipping.
It is fixing that displacement nut 11 will penetrate the intubate support 13 of guide rail, when it rotates the generation displacement on guide rail, drives intubate 1 move left and right by intubate support 13 and intubate pipe collar 12.
The ultimate principle that is used for the catalyst feed pipeline device of olefin polymetiation process provided by the present invention is:
In the gas-phase fluidized bed olefin polymetiation process, under the normal operation situation, introduce olefin gas at threeway 5 places, ethylene gas for example, this gas enters reactor along the outside of intubate 1, will be dispelled by the catalyzer of intubate 1 inflow reactor.When running into Special Circumstances, the feeding pipe (intubate 1) of catalyzer when shifting out reactor, then need be closed the ethylene gas that is entered by threeway 5, and rare gas element is introduced from here.The rare gas element of being introduced by threeway 5 can be nitrogen or other rare gas element, and its pressure is than the high at least 0.2kg/cm of the pressure in the reactor
2, such rare gas element can play the effect of reaction medium to external leakage that stop.Nut 11 is adjusted in rotation (to see accompanying drawing 1) by to the right, drives intubate support 13 and moves to the right.Because intubate support 13 and intubate pipe collar 12 are for closely to be connected, and intubate 1 and intubate pipe collar 12, must drive intubate 1 to move to the right also for closely to be connected when intubate support 13 is mobile to the right, along with the continuous rotation of adjusting nut 11, intubate 1 just is moved out of reactor.When the left end of intubate 1 moves on to the right side of ball valve 4, should close ball valve 4 immediately therebetween.
When needs are packed intubate 1 into reactor, at first intubate 1 is passed sealing gland 7, lock packing 6, threeway 5.Suitably screwing hermetic gland 7 prevents that gas from being leaked by lock packing 6 places.Rare gas element is introduced by threeway 5 places, afterwards, opened ball valve 4.(see accompanying drawing 1) to the left and move adjustment nut 11, enter reactor and reach the suitable degree of depth up to intubate 1.As required, ethylene gas can be closed and switched to the rare gas element at threeway 5 places.
Therefore, in polymerization process, gas-phase polythene fluidized-bed process particularly, when the catalyzer pipeline is that intubate 1 is when stopping state occurring, under the situation of not stopping, the present invention can shift out reactor with intubate 1 in safe and convenient ground, cleans or changes, and the reactor of packing at an easy rate, online solved that catalyst feed pipeline stops up problem.By the simple device of this cover, under the state of introducing protection of inert gas, can realize being with pressing the catalyzer pipeline is shifted out polymerization reactor and the polymerization reactor of packing into.This device is simple, small and exquisite, easy to operate, and has very high security.
Description of drawings
Fig. 1 catalyst feed pipeline device that is used for olefin polymetiation process of the present invention
The feeding unit of catalyzer in the existing olefin polymetiation process of Fig. 2
Embodiment
Specific embodiments given below is for the present invention is described, rather than limits the invention.
Catalyst feed pipeline device of the present invention is seen accompanying drawing 1, its gas fluidised bed polymerisation that is used for ethene reflects that wherein this device mainly comprises with lower member: the wall 16 of intubate 1, sleeve pipe 2, mariages head 3, ball valve 4, threeway 5, lock packing 6, sealing gland 7, back tightening nut 8, jackscrew 9, rail brackets 10, displacement nut 11, intubate pipe collar 12, intubate support 13 guide rails 14, steady brace 15, polymerization reactor.
Wherein intubate 1 is a catalyst feed pipeline; sleeve pipe 2 is connected with the form of mariages head 3 with screw thread; sleeve pipe 2 plays a part to support and protection intubate 1; mariages head 3 is fixed on the reactor by screw thread; mariages head 3 links to each other with ball valve 4; ball valve 4 links to each other with threeway 5, and ball valve 4 plays a part to cut off the gas of inside reactor to external leakage after intubate 1 is being shifted out reactor.
An outlet in threeway-5 is provided with a sealing gland 7, also needs lock packing 6 in order to guarantee stopping property.Sealing back tightening nut 8 is fastened on rail brackets 10 on the sealing gland 7.
Jackscrew 9 is fastened on guide rail 14 on the rail brackets 10 loosening to prevent it, and the quantity of guide rail 14 is two.Intubate pipe collar 12 is held tightly with intubate 1, and intubate support 13 is sandwiched in wherein, and intubate support 13 can be guide rail 14 cofree horizontally slipping.
It is fixing that displacement nut 11 will penetrate the intubate support 13 of guide rail, when it rotates the generation displacement on guide rail, drives intubate 1 move left and right by intubate support 13 and intubate pipe collar 12.
When catalyst feed pipeline is one section pipeline that intubate 1 is positioned at inside reactor when taking place to stop up, can adopt following steps to shift out intubate 1:
1. confirm that catalyst charge closes.
2. close the ethylene gas that enters by threeway 5, and rare gas element is introduced from here.
3. suitably unscrew sealing gland 7.
4. the swing offset nut 11, and intubate 1 is moved to the right.When displacement nut 11 during, close this ball valve 4 immediately near steady brace 15.
5. close the rare gas element of introducing by threeway 5.
6. after confirming that intubate 1 to the pressure between the threeway 5 is normal pressure, shift out intubate 1, and clear up or change.
Intubate 1 cleaning or replacing can be packed it into according to the following steps:
1. unscrew sealing gland 7, be convenient to intubate 1 and pass lock packing 6.
2. continue swing offset nut 11, make the left end of intubate 1 pass sealing gland 7 and lock packing 6 up near ball valve 4 time, displacement nut 11 stops the rotation.
3. rare gas element is introduced from threeway 5, simultaneously suitable screwing hermetic gland 7 guarantees that rare gas element can not leak outside from lock packing.
4. open ball valve 4, continue swing offset nut 11 to the left, up to the position of intubate 1 being delivered to regulation.
5. suitably screwing hermetic gland 7 guarantees that sealing is tight.
6. close the nitrogen of introducing by threeway 5, and ethene is introduced from here.
7. prepare catalyst charge.
Claims (5)
1. catalyst feed pipeline device that is used for olefin polymetiation process, this device comprises with lower member: intubate [1], sleeve pipe [2], mariages head [3], ball valve [4], threeway [5], lock packing [6], sealing gland [7], back tightening nut [8], jackscrew [9], rail brackets [10], displacement nut [11], intubate pipe collar [12], intubate support [13], guide rail [14], steady brace [15];
Wherein intubate [1] is a catalyst feed pipeline, and sleeve pipe [2] is connected with the form of mariages head [3] with screw thread, and sleeve pipe [2] plays a part to support and protection intubate [1]; mariages head [3] is fixed on the reactor by screw thread; mariages head [3] links to each other with ball valve [4], and ball valve [4] links to each other with threeway [5]
In an outlet of threeway [5], be provided with a sealing gland [7] and lock packing [6], back tightening nut [8] is fastened on rail brackets [10] on the sealing gland [7];
Jackscrew [9] is fastened on rail brackets [10] with guide rail [14], and intubate pipe collar [12] is held tightly with intubate [1], and intubate support [13] is sandwiched in wherein, and intubate support [13] can be cofree the horizontally slipping of guide rail [14];
It is fixing that displacement nut [11] will penetrate the intubate support [13] of guide rail, when it rotates the generation displacement on guide rail, drives intubate [1] move left and right by intubate support [13] and intubate pipe collar [12];
Steady brace [15] is used to prevent to adjust nut [11] and comes off from guide rail.
2. the catalyst feed pipeline device that is used for olefin polymetiation process according to claim 1 is characterized in that the quantity of guide rail [14] is more than two.
3. the catalyst feed pipeline device that is used for olefin polymetiation process according to claim 1 is characterized in that, ball valve [4] plays a part to cut off the gas of inside reactor to external leakage after intubate [1] is being shifted out reactor.
4. one kind is adopted the described catalyst feed pipeline device that is used for olefin polymetiation process of one of claim 1-3, realizes the online method that shifts out catalyst feed pipeline, and it may further comprise the steps:
1. confirm that catalyst charge closes;
2. close the olefin gas that enters by threeway [5], and rare gas element is introduced from here;
3. suitably unscrew sealing gland [7];
4. swing offset nut [11] moves intubate [1] to the right; When displacement nut [11] when the steady brace [15], close this ball valve [4] immediately;
5. close the rare gas element of introducing by threeway [5];
6. after confirming that intubate [1] to the pressure between the threeway [5] is normal pressure, shift out intubate [1].
5. one kind is adopted the described catalyst feed pipeline device that is used for olefin polymetiation process of one of claim 1-3, is implemented in traditional thread binding method of going into catalyst feed pipeline, and it may further comprise the steps:
1. unscrew sealing gland [7], be convenient to intubate [1] and pass lock packing [6];
2. swing offset nut [11] makes the left end of intubate [1] pass sealing gland [7] and lock packing [6] up near ball valve [4] time, and displacement nut [11] stops the rotation;
3. rare gas element is introduced from threeway [5], simultaneously suitable screwing hermetic gland [7] guarantees that rare gas element can not leak outside from lock packing;
4. open ball valve [4], continue swing offset nut [11] to the left, up to the position of intubate [1] being delivered to regulation;
5. suitably screwing hermetic gland [7] guarantees that sealing is tight;
6. close the nitrogen of introducing by threeway [5], and olefin gas is introduced from here;
7. prepare catalyst charge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810225198 CN101724109B (en) | 2008-10-30 | 2008-10-30 | Device of catalyst feed pipeline for olefin polymerization process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200810225198 CN101724109B (en) | 2008-10-30 | 2008-10-30 | Device of catalyst feed pipeline for olefin polymerization process |
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| CN101724109A CN101724109A (en) | 2010-06-09 |
| CN101724109B true CN101724109B (en) | 2011-10-12 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102451646B (en) * | 2010-10-20 | 2014-03-12 | 中国石油化工股份有限公司 | Quantitative injection device |
| CN104974277B (en) * | 2014-04-10 | 2017-04-26 | 中国石油化工股份有限公司 | Catalyst feeding method used in olefin polymerization, ethylene propylene monomer or ethylene propylene diene monomer and preparation method thereof |
| CN108686588B (en) * | 2018-06-07 | 2023-11-28 | 超达阀门集团股份有限公司 | Catalyst injection device capable of being cleaned on line |
| CN113680282A (en) * | 2021-08-12 | 2021-11-23 | 中国石油天然气股份有限公司 | Reactor feed nozzle capable of being detached on line |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5310833A (en) * | 1990-07-20 | 1994-05-10 | Nippon Petrochemicals Company, Ltd. | Process for feeding catalyst to fluidized bed for vapor phase polymerization |
| CN2312065Y (en) * | 1997-09-04 | 1999-03-31 | 中国石化扬子石油化工公司 | Apparatus for automatically feeding catalyst |
| CN2467174Y (en) * | 2001-02-28 | 2001-12-26 | 抚顺石油学院 | Catalyst automatic feeding apparatus |
| CN101041121A (en) * | 2006-03-17 | 2007-09-26 | 北京航天动力研究所 | Material feeding device |
-
2008
- 2008-10-30 CN CN 200810225198 patent/CN101724109B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5310833A (en) * | 1990-07-20 | 1994-05-10 | Nippon Petrochemicals Company, Ltd. | Process for feeding catalyst to fluidized bed for vapor phase polymerization |
| CN2312065Y (en) * | 1997-09-04 | 1999-03-31 | 中国石化扬子石油化工公司 | Apparatus for automatically feeding catalyst |
| CN2467174Y (en) * | 2001-02-28 | 2001-12-26 | 抚顺石油学院 | Catalyst automatic feeding apparatus |
| CN101041121A (en) * | 2006-03-17 | 2007-09-26 | 北京航天动力研究所 | Material feeding device |
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