CN104693325A - Separation equipment for gaseous phase system in polyolefin device - Google Patents
Separation equipment for gaseous phase system in polyolefin device Download PDFInfo
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- CN104693325A CN104693325A CN201310661108.0A CN201310661108A CN104693325A CN 104693325 A CN104693325 A CN 104693325A CN 201310661108 A CN201310661108 A CN 201310661108A CN 104693325 A CN104693325 A CN 104693325A
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Abstract
The invention discloses separation equipment for a gaseous phase system in a polyolefin device, belonging to the field of polyolefin production. The separation equipment for the gaseous phase system in the polyolefin device comprises a reaction kettle, a separator, a first filter and a condenser, wherein the reaction kettle, the separator, the first filter and the condenser are sequentially communicated with one another; the condenser is communicated with the reaction kettle; and in a reaction process, a polyolefin gaseous phase with entrained polyolefin particles escapes out of polyolefin slurry to enter the separator and the first filter so as to be separated and filtered, the polyolefin particles are removed, and the polyolefin gaseous phase enters the condenser to be condensed into polyolefin condensate so as to flow back into the reaction kettle. According to the separator, the polyolefin particles can be separated out from the polyolefin gaseous phase, so that the polyolefin particles in the polyolefin gaseous phase are reduced, the polyolefin particles accumulated in the first filter are reduced, the service cycle of the first filter is guaranteed, the workload of the staff is reduced, the maintenance cost is lowered, and the polyolefin production cost is fundamentally reduced.
Description
Technical field
The present invention relates to manufacture of polyolefins field, particularly the separating device of gassy system in a kind of polyolefin device.
Background technology
In polyolefinic production process, because polyolefine is the polyolefine slurries that gas, liquid, solid three-phase mixes, and the polyolefine finally come into operation is polyolefine solid phase, institute thinks and obtains polyolefine solid phase, first need by the separating device of gassy system in polyolefin device polyolefine gas phase be separated from polyolefine slurries and be converted into polyolefine liquid phase, then together send into subsequent handling through polyolefine liquid phase and polyolefine solid phase and process.
In prior art, in polyolefin device, the separating device of gassy system generally comprises: reactor, strainer and condenser, polyolefine slurries carry out polyreaction in a kettle., in reaction process, polyolefine gas phase is overflowed from polyolefine slurries, now be entrained with part polyolefine powder in polyolefine gas phase, then described polyolefine gas phase enters strainer, the polyolefine powder carried secretly is filtered, polyolefine gas phase after filtration enters condenser condenses and obtains polyolefine lime set, and described polyolefine lime set flows back to reactor, with polyolefine solid phase remaining in reactor and polyolefine liquid-phase mixing.
Realizing in process of the present invention, contriver finds that prior art at least exists following problem:
Polypropylene powder is entrained with due in the polyolefine gas phase of overflowing from polyolefine slurries in reactor in prior art, need to filter polyolefine gas phase, when polyolefine gas phase filtration, due to a large amount of accumulation in the filter of polyolefine powder, thus easily cause filter stoppage to be damaged, make too short, the necessary frequent replacing of its life cycle, and then considerably increase the workload of staff, also add recondition expense simultaneously, polyolefinic production cost is increased.
Summary of the invention
Easily block damage the short problem of the life cycle that causes to solve prior art strainer, embodiments provide the separating device of gassy system in a kind of polyolefin device.Described technical scheme is as follows:
The separating device of gassy system in a kind of polyolefin device, it is characterized in that, in described polyolefin device, the separating device of gassy system comprises: reactor, separator, first strainer and condenser, described reactor, described separator, described first strainer is communicated with in turn with described condenser, and described condenser is also communicated with described reactor, polyolefine slurries react in described reactor, the polyolefine gas phase of carrying polyolefine powder secretly is overflowed from described polyolefine slurries, and successively through described separator and described first strainer, described separator is used for the described polyolefine separation of powder and granule will carried secretly in described polyolefine gas phase, described first strainer is used for described polyolefine powder remaining in the described polyolefine gas phase after by separation and filters, obtain polyolefine lime set after described polyolefine gas phase after filtration enters described condenser condenses and flow back to described reactor.
Further, described separator is cyclonic separator.
Further, in described polyolefin device, the separating device of gassy system also comprises and rises gas bag, the described gas bag that rises is arranged on described reactor inner upper, and the described gas bag that rises is provided with at least one, described polyolefine gas phase is introduced into after overflowing from described polyolefine slurries and describedly rises gas bag, then enters described separator from the described gas bag that rises.
Further, in described polyolefin device, the separating device of gassy system also comprises collecting chamber, and described collecting chamber is arranged on below described separator, and described collecting chamber is for collecting the described polyolefine powder separated from described polyolefine gas phase.
Further, in described polyolefin device, the separating device of gassy system also comprises water cooler, and described water cooler is arranged between described condenser and described reactor, and described water cooler is used for cooling described polyolefine lime set.
As preferably, in described polyolefin device, the separating device of gassy system also comprises lime set pump, described lime set pump is arranged between described water cooler and described reactor, and described lime set pump is used for providing power to described polyolefine lime set, makes described polyolefine lime set flow back to described reactor.
Further, in described polyolefin device, the separating device of gassy system also comprises reacting kettle jacketing, it is outside that described reacting kettle jacketing is arranged on described reactor, and be provided with heat-conducting liquid in described reacting kettle jacketing, and described reacting kettle jacketing is for keeping the temperature of described reactor.
As preferably, in described polyolefin device, the separating device of gassy system also comprises chuck water pump, described chuck water pump is communicated with described reacting kettle jacketing, and described chuck water pump is used for providing power to described heat-conducting liquid, and described heat-conducting liquid is circulated in described reacting kettle jacketing.
Further, in described polyolefin device, the separating device of gassy system also comprises voltage-controlled valve, described voltage-controlled valve is communicated with described first strainer, and described voltage-controlled valve, for controlling pressure in described reactor, makes pressure in described reactor within the scope of specified pressure.
As preferably, in described polyolefin device, the separating device of gassy system also comprises the second strainer, described second strainer is arranged between described first strainer and described voltage-controlled valve, when pressure in described reactor exceedes described specified pressure, described polyolefine gas phase after described first metre filter enters described second strainer again and discharge, and makes the pressure of described reactor within the scope of described specified pressure.
The beneficial effect that the technical scheme that the embodiment of the present invention provides is brought is:
The present invention is by arranging separator, effectively polyolefine powder can be separated from polyolefine gas phase, the polyolefine powder carried secretly in polyolefine gas phase after separation greatly reduces, the polyolefine powder accumulated in first strainer when making to filter greatly reduces, ensure that the life cycle of the first strainer, reduce the workload of staff, reduce recondition expense, fundamentally reduce polyolefinic production cost and significant loss.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing used required in describing embodiment is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of the separating device of gassy system in the polyolefin device that provides of the embodiment of the present invention;
Fig. 2 is the structural representation of separator in the separating device of gassy system in the polyolefin device that provides of further embodiment of this invention;
Wherein, 1 reactor, 2 separators, 3 first strainers, 4 condensers, 5 liters of gas bags, 6 collecting chambers, 7 second strainers, 8 water coolers, 9 lime set pumps, 10 reacting kettle jacketings, 11 chuck water pumps, 12 voltage-controlled valves, A inlet mouth, B venting port, C discharge port.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly, below in conjunction with accompanying drawing, embodiment of the present invention is described further in detail.
Embodiment one
As shown in Figure 1, embodiments provide the separating device of gassy system in a kind of polyolefin device, in described polyolefin device, the separating device of gassy system comprises: reactor 1, separator 2, first strainer 3 and condenser 4, described reactor 1, described separator 2, described first strainer 3 is communicated with by pipeline in turn with described condenser 4, and described condenser 4 and described reactor 1 are by described pipeline communication, polyolefine slurries enter described reactor 1 and carry out polyreaction, polyolefine slurries are gas-phase polyolefin, liquid phase polyolefine and the polyolefinic mixture of solid phase, in the polymerization process, stirring rake in reactor constantly stirs polyolefine slurries, polyolefine Vapor Entrainment part polyolefine powder is overflowed from described polyolefine slurries, and the described polyolefine powder that described polyolefine gas phase is carried secretly with it enters described separator 2 by pipeline, described separator 2 is by described polyolefine powder and described polyolefine gas phase separation, then described polyolefine powder is collected, and described polyolefine gas phase enters described strainer by pipeline, and described polyolefine powder residual in polyolefine gas phase is filtered, polyolefine lime set is obtained after the polyolefine gas phase eventually passing filtration enters the condensation of described condenser 4 by pipeline, described polyolefine lime set flows back to described reactor 1 along described pipeline.
The present invention is by arranging separator, effectively polyolefine powder can be separated from polyolefine gas phase, the polyolefine powder carried secretly in polyolefine gas phase after separation greatly reduces, the polyolefine powder accumulated in first strainer when making to filter greatly reduces, ensure that the life cycle of the first strainer, reduce the workload of staff, reduce recondition expense, fundamentally reduce polyolefinic production cost.
Further, as shown in Figure 2, in the embodiment of the present invention, described separator 2 is cyclonic separator, described polyolefine gas phase and its polyolefine powder carried secretly enter described separator 2 from inlet mouth A, under the effect of rotational gas flow and interior rotational gas flow outside, make polyolefine powder and polyolefine gas phase separation, the venting port B of polyolefine gas phase above separator 2 enters the first strainer 3 along pipeline and filters, and polyolefine powder is discharged along the discharge port C below separator 2 and is collected.
Further, as shown in Figure 1, in the embodiment of the present invention, in described polyolefin device, the separating device of gassy system also comprises and rises gas bag 5, the described gas bag 5 that rises is arranged on described reactor 1 inner upper, and the described gas bag 5 that rises is provided with at least one, described polyolefine slurries carry out polyreaction in reactor 1, in whipping process, polyolefine gas phase is overflowed from described polyolefine slurries, and be temporarily stored in and describedly rise in gas bag 5, the polyolefine powder of described polyolefine gas phase and its entrained with enters separator 2 from described liter above gas bag 5 by described pipeline subsequently, by arrange rise gas bag 5 can give described polyolefine gas phase a process cushioned is provided, the slurries in reactor 1 are avoided together to enter pipeline and separator 2 with polyolefine gas phase in the process stirred.
Further, as shown in Figure 1, in the embodiment of the present invention, in described polyolefin device, the separating device of gassy system also comprises collecting chamber 6, described collecting chamber 6 is arranged on below described separator 2, after the described polyolefine separation of powder and granule that described polyolefine gas phase is carried secretly with it, described polyolefine powder enters described collecting chamber 6, together enters subsequent treatment process together with remaining polyolefine slurries after polyolefine gas phase effusion in reactor 1.
Further, as shown in Figure 1, in the embodiment of the present invention, in described polyolefin device, the separating device of gassy system also comprises water cooler 8, described water cooler 8 is communicated with described condenser 4, described polyolefine gas phase is after described condenser 4 cools, enter described water cooler 8 again to cool, finally flow back to described reactor 1, water cooler 8 can reduce the temperature of polyolefine lime set further, when polyolefine lime set flows back to reactor 1, can ensure that the temperature of reactor 1 can not be too high, be conducive to polyolefine in the separating device of gassy system in described polyolefin device and carry out SAPMAC method.
As preferably, as shown in Figure 1, in the embodiment of the present invention, in described polyolefin device, the separating device of gassy system also comprises lime set pump 9, described lime set pump 9 is communicated with described water cooler 8, described reactor 1 respectively, and described polyolefine lime set, after described water cooler 8 cools again, enters described reactor 1 by described lime set pump 9, there is provided power can to cooled polyolefine lime set by described lime set pump 9, make it enter reactor 1.
Further, as shown in Figure 1, in the embodiment of the present invention, in described polyolefin device, the separating device of gassy system also comprises reacting kettle jacketing 10, it is outside that described reacting kettle jacketing 10 is arranged on described reactor 1, falling heat-transfer liquid in described reacting kettle jacketing 10, the most frequently used heat-conducting liquid is water, after polyolefine slurries enter reactor 1, before reaction starts, hot steam is passed in described reacting kettle jacketing 10, described reactor 1 temperature is made to raise the temperature of reaction reaching described polyolefine lime set polyreaction, after reaction starts, stop injecting hot steam, described reacting kettle jacketing 10 is incubated for giving described reactor 1.
As preferably, as shown in Figure 1, in the embodiment of the present invention, in described polyolefin device, the separating device of gassy system also comprises chuck water pump 11, described chuck water pump 11 provides power for the heat-conducting liquid in described reacting kettle jacketing 10, and the heat-conducting liquid in described reacting kettle jacketing 10 is circulated.
Further, as shown in Figure 1, in the embodiment of the present invention, in described polyolefin device, the separating device of gassy system also comprises voltage-controlled valve 12, described voltage-controlled valve 12 is communicated with described first strainer 3, the pressure controlling in described reactor 1 by regulating the aperture of described voltage-controlled valve 12, when in described reactor 1, pressure exceedes specified pressure, the aperture of described voltage-controlled valve 12 is tuned up, described polyolefine gas phase is filtered rear portion through described first strainer 3 and is entered gas phase recovery system by voltage-controlled valve 12, when in described reactor 1, pressure is within the scope of described specified pressure, the aperture of described voltage-controlled valve 12 is turned down or closed, all polyolefine gas phases after the first strainer 3 filters all enter condenser 4 and carry out condensation.
Further, as shown in Figure 1, in the embodiment of the present invention, in described polyolefin device, the separating device of gassy system also comprises the second strainer 7, described second strainer 7 is arranged between described first strainer 3 and described voltage-controlled valve 12, when voltage-controlled valve 12 is opened, the polyolefine gas phase after the first strainer 3 filters enters in the second strainer 7 filters again, then enters gas phase recovery system through voltage-controlled valve and carries out recycle.
The present invention utilizes the principle of gas-particle separation, in separator 2, make the polyolefine gas phase in reactor and the polyolefine powder carried secretly thereof obtain being separated preferably, effectively before entering the first strainer 3, allowing the granularity of the polyolefine powder contained in polyolefine gas phase be less than 50 microns, the polyolefine powder separated being disposed to suitable operation by collecting simultaneously; Guarantee polyolefine gassy system circular flow effectively and reasonably in reactor.In June, 2002, this project is implemented during the polypropylene plant general overhaul of Liaohe River petro-chemical corporation of CNPC, this invention is implemented, and verified in going into operation subsequently, use separator 2 to make the good separation of polyolefine gas phase and polyolefine powder, make the life cycle of the first strainer 3 and the second strainer 7 extend to more than 50 days by original 7 days.The present invention is applicable to gas phase circulation, the recovery system technological process of the polyolefin gas phase polymerization still of polyolefine industry, comprises domestic interval small-entity polypropylene device, and relevant polyolefin device etc., the especially SPG technique polypropylene plant of polypropylene art.
Embodiment two
As shown in Figure 1, embodiments provide the separating device of gassy system in a kind of polyolefin device, after polyolefine slurries enter reactor 1, hot water is passed in reacting kettle jacketing 10, the temperature of reactor 1 is made to reach 75 ~ 95 DEG C, keep pressure in reactor 1 to be 2.5 ~ 2.8MPa simultaneously, described polyolefine slurries are made to carry out polyreaction, the polyolefine powder obtaining polyolefine gas phase and carry secretly with it, described polyolefine gas phase and the polyolefine powder carried secretly thereof enter separator 2 by pipeline, and the specification of described separator 2 is: Ф 600 × 1560,0.24m
3, utilize the principle of gas-particle separation by separator 2 by polyolefine gas phase and its polyolefine separation of powder and granule carried secretly, and described polyolefine powder enters collecting chamber 6, the specification of described collecting chamber is: Ф 600 × 1560,0.24m
3and enter subsequent disposal operation through pulse discharge, polyolefine gas phase after separation enters the first strainer 3 and removes remaining a small amount of polyolefine powder in described polyolefine gas phase, after then also being cooled by water cooler 8 by the condensation of described condenser 4, delivers to reactor 1 by lime set pump 9.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (10)
1. the separating device of gassy system in a polyolefin device, it is characterized in that, in described polyolefin device, the separating device of gassy system comprises: reactor, separator, first strainer and condenser, described reactor, described separator, described first strainer is communicated with in turn with described condenser, and described condenser is also communicated with described reactor, polyolefine slurries react in described reactor, the polyolefine gas phase of carrying polyolefine powder secretly is overflowed from described polyolefine slurries, and successively through described separator and described first strainer, described separator is used for the described polyolefine separation of powder and granule will carried secretly in described polyolefine gas phase, described first strainer is used for described polyolefine powder remaining in the described polyolefine gas phase after by separation and filters, obtain polyolefine lime set after described polyolefine gas phase after filtration enters described condenser condenses and flow back to described reactor.
2. the separating device of gassy system in polyolefin device according to claim 1, it is characterized in that, described separator is cyclonic separator.
3. the separating device of gassy system in polyolefin device according to claim 1, it is characterized in that, in described polyolefin device, the separating device of gassy system also comprises and rises gas bag, the described gas bag that rises is arranged on described reactor inner upper, and the described gas bag that rises is provided with at least one, described polyolefine gas phase is introduced into after overflowing from described polyolefine slurries and describedly rises gas bag, then enters described separator from the described gas bag that rises.
4. the separating device of gassy system in polyolefin device according to claim 3, it is characterized in that, in described polyolefin device, the separating device of gassy system also comprises collecting chamber, described collecting chamber is arranged on below described separator, and described collecting chamber is for collecting the described polyolefine powder separated from described polyolefine gas phase.
5. the separating device of gassy system in the polyolefin device according to any one of claim 1-4, it is characterized in that, in described polyolefin device, the separating device of gassy system also comprises water cooler, described water cooler is arranged between described condenser and described reactor, and described water cooler is used for cooling described polyolefine lime set.
6. the separating device of gassy system in polyolefin device according to claim 5, it is characterized in that, in described polyolefin device, the separating device of gassy system also comprises lime set pump, described lime set pump is arranged between described water cooler and described reactor, described lime set pump is used for providing power to described polyolefine lime set, makes described polyolefine lime set flow back to described reactor.
7. the separating device of gassy system in polyolefin device according to claim 1, it is characterized in that, in described polyolefin device, the separating device of gassy system also comprises reacting kettle jacketing, it is outside that described reacting kettle jacketing is arranged on described reactor, and being provided with heat-conducting liquid in described reacting kettle jacketing, described reacting kettle jacketing is for keeping the temperature of described reactor.
8. the separating device of gassy system in polyolefin device according to claim 7, it is characterized in that, in described polyolefin device, the separating device of gassy system also comprises chuck water pump, described chuck water pump is communicated with described reacting kettle jacketing, described chuck water pump is used for providing power to described heat-conducting liquid, and described heat-conducting liquid is circulated in described reacting kettle jacketing.
9. the separating device of gassy system in polyolefin device according to claim 8, it is characterized in that, in described polyolefin device, the separating device of gassy system also comprises voltage-controlled valve, described voltage-controlled valve is communicated with described first strainer, described voltage-controlled valve, for controlling pressure in described reactor, makes pressure in described reactor within the scope of specified pressure.
10. the separating device of gassy system in polyolefin device according to claim 9, it is characterized in that, in described polyolefin device, the separating device of gassy system also comprises the second strainer, described second strainer is arranged between described first strainer and described voltage-controlled valve, when pressure in described reactor exceedes described specified pressure, described polyolefine gas phase after described first metre filter enters described second strainer again and discharge, and makes the pressure of described reactor within the scope of described specified pressure.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109437191A (en) * | 2018-12-03 | 2019-03-08 | 大连理工大学 | A kind of " press pump " coupling microwaves quickly prepare the apparatus and method of high yield active carbon |
| CN111718437A (en) * | 2020-06-11 | 2020-09-29 | 国家能源集团宁夏煤业有限责任公司 | Copolymerization reaction system and method for preparing impact-resistant polypropylene |
| CN112316848A (en) * | 2020-09-14 | 2021-02-05 | 安徽金邦医药化工有限公司 | Sodium methoxide production system with tail gas recovery device |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20040136881A1 (en) * | 1997-07-15 | 2004-07-15 | Verser Donald W. | Separation of polymer particles and vaporized diluent in a cyclone |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109437191A (en) * | 2018-12-03 | 2019-03-08 | 大连理工大学 | A kind of " press pump " coupling microwaves quickly prepare the apparatus and method of high yield active carbon |
| CN111718437A (en) * | 2020-06-11 | 2020-09-29 | 国家能源集团宁夏煤业有限责任公司 | Copolymerization reaction system and method for preparing impact-resistant polypropylene |
| CN112316848A (en) * | 2020-09-14 | 2021-02-05 | 安徽金邦医药化工有限公司 | Sodium methoxide production system with tail gas recovery device |
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