CN107537413A - Olefin polymerization combined type method for controlling reaction temperature and device - Google Patents
Olefin polymerization combined type method for controlling reaction temperature and device Download PDFInfo
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- CN107537413A CN107537413A CN201610490022.XA CN201610490022A CN107537413A CN 107537413 A CN107537413 A CN 107537413A CN 201610490022 A CN201610490022 A CN 201610490022A CN 107537413 A CN107537413 A CN 107537413A
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- thermostat
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Abstract
The present invention relates to a kind of olefin polymerization combined type method for controlling reaction temperature and device, belong to chemical reaction temperature control technology field.Described olefin polymerization combined type method for controlling reaction temperature, its used device include thermostat, and thermostat connects into a circulation loop with overflow pipe, water supply tank, small pump, filling pipe successively；The bottom of thermostat connects circulating pump by outlet pipe；The top of thermostat side is provided with return pipe；Circulating pump is provided with more, and every circulating pump is connected with after-heater, after-heater connection circulation pipe.The present invention is controlled by DCS, is realized reaction temperature and is automatically controlled, while after-heater is devised in circulation line, realizes temperature control of the single thermostat to multiple different temperatures polymerisations, saves space, improves efficiency；The present invention can also realize the temperature control of multiple identical temperature polymerizations reactions；The present invention is closed-loop operation, will not increase operating space humidity.
Description
Technical field
The present invention relates to a kind of olefin polymerization combined type method for controlling reaction temperature and device, belong to chemical reaction temperature
Control technology field.
Background technology
Polyolefin is a kind of synthetic resin of excellent performance, is widely used.Catalyst used in olefinic polymerization mainly has Z-N
The types such as type, chromium system, metallocene, substantial amounts of heat can be discharged, it is necessary to carry out removing heat in time in course of reaction, reach reaction temperature
Stability contorting, so as to ensure the stable performance of vistanex, improve product quality.In present temprature control method,
Temperature control is carried out using the corresponding reactor of a water-bath mostly, this will certainly increase equipment occupation space, cause space
Waste, it is less efficient.And when a course of reaction needs priority to be carried out under two reaction temperatures, i.e., segmentation is reacted, mesh
Preceding water-bath temperature control method lacks quick response mode, and warm area transit time is longer.
CN203870493U discloses a kind of novel and multifunctional water bath device, including casing and controller, is provided with casing
Moisturizing pond and at least two sea water baths, moisturizing pond are connected respectively by priming valve with sea water bath, and having heaters is all provided with sea water bath,
The liquid level sensor of induction level position and the temperature sensor of the internal bath temperature of measurement, level sensing are additionally provided with sea water bath
Device and temperature sensor are connected with controller respectively.By using controller, temperature sensor, liquid level sensor, heater and
Priming valve realize two sea water bath independent heatings, it is automatic add thermophilic hot water, timing alarm, overheat protector, anti-anhydrous heating and
The purpose of bath temperature fluctuation is greatly lowered.Two water-baths are really grouped together and used by the invention, realize
Respectively control of a set of control system to two water-baths, but the invention does not have the water-bath circulatory system, can not be poly- to outside
Close reactor and carry out temperature control operation, while constant temperature method can only be carried out respectively in two water-baths, can not realize to enter water-bath
The alternating temperature operation of row multi-temperature zone.
CN205109685U discloses a kind of self-watering multifunction constant temperature water-bath, there is provided One function is powerful, operation
Convenient, time saving and energy saving thermostat water bath, achievable automatic uniform add water, increase pot cover height, convenient placement round center hole
Sub- pot cover, draining are convenient；And it is furnished with more specification rack for test tubes, effectively reduces the workload of experimenter, it is time saving and energy saving, reduce peace
Full hidden danger, it is convenient and practical.But the invention can not be controlled also without the water-bath circulatory system is set to outside polymer reactor
Temperature operation, can only easily be operated in water-bath, can not realize that the alternating temperature that multi-temperature zone is carried out to water-bath operates.
The content of the invention
, can be simultaneously to differential responses it is an object of the invention to provide olefin polymerization combined type method for controlling reaction temperature
Multiple polymerisations of temperature carry out temperature control, improve efficiency, save space；Present invention simultaneously provides the device that it is used.
Olefin polymerization combined type method for controlling reaction temperature of the present invention, its used device include constant temperature
Groove, thermostat connect into a circulation loop with overflow pipe, water supply tank, small pump, filling pipe successively；The bottom of thermostat passes through
Outlet pipe connects circulating pump；The top of thermostat side is provided with return pipe；Temperature sensor, agitator are provided with thermostat and is added
Hot device；Circulating pump is provided with more, and every circulating pump is connected with after-heater, after-heater connection circulation pipe.
Control method comprises the following steps：
(1) agitator is started, by setting the temperature of thermostat, heater is begun to warm up, and is set when thermostat temperature reaches
After constant temperature degree, heater is automatically stopped heating, and multiple polymerisations start to react；
(2) temperature control
Circulation pipe carries out temperature control to multiple polymerisations, and DCS system requires according to the temperature control of polymerisation, calculates each two
The heating power of secondary heater, heated recirculated water are controlled through circulation pipe to polymerisation, the recirculated water through heat exchange
Thermostat is entered by return pipe；
(3) thermostat temperature control
The measurement signal real-time display of temperature sensor is in DCS system in thermostat, when thermostat temperature is less than constant temperature
When groove design temperature allows to fluctuate lower limit, heater automatic start；When thermostat temperature allows the fluctuation upper limit higher than design temperature
When, small pump automatic start, the water at low temperature in water supply tank enters thermostat, and thermostat temperature is cooled；Constant temperature trough inner water
When position reaches overfall, the recirculated water of super water level enters water supply tank through overflow pipe.
Device used in described olefin polymerization combined type method for controlling reaction temperature, including thermostat, thermostat
Connect into a circulation loop with overflow pipe, water supply tank, small pump, filling pipe successively, the temperature in water supply tank is room temperature, moisturizing
The startup time of pump is adjustable；The bottom of thermostat connects circulating pump by outlet pipe；The top of thermostat side is provided with return pipe,
The recirculated water for completing heat exchange is back to thermostat through return pipe；Circulating pump is provided with more, and every circulating pump is and reheating
Device is connected, after-heater connection circulation pipe.
Wherein：
The power adjustable of circulating pump
Rotating speed can be adjusted as needed for agitator
The side of thermostat offers form, and the water level in thermostat can be observed, and top is provided with detachable cover
Plate, under normal circumstances thermostat be in air-tight state, trough inner water point will not evaporate, and avoid increasing humidity in operating space, this is right
It is extremely important for the operation that space humidity requires, can be to detachable cover plate when thermostat needs maintenance.
Various types of signal in combined type reaction temperature control device is connected with control unit by DCS, to combined type temperature
Water-bath is controlled to carry out remote control operation.
Beneficial effects of the present invention are as follows：
The present invention is controlled by DCS, is realized reaction temperature and is automatically controlled, while secondary add is devised in circulation line
Hot device, temperature control of the single thermostat to multiple different temperatures polymerisations is realized, save space, improve efficiency；This hair
The bright temperature control that can also realize multiple identical temperature polymerizations reactions；The present invention is closed-loop operation, will not increase operating space
Humidity.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention.
In figure：1st, water supply tank；2nd, small pump；3rd, overflow pipe；4th, thermostat；5th, temperature sensor；6th, agitator；7th, heat
Device；8th, return pipe；9th, circulation pipe；10th, outlet pipe；11st, circulating pump；12nd, after-heater；13rd, heating tube；14th, form；15、
Dismountable cover plate.
Embodiment
The present invention is described further with reference to embodiments.
Embodiment 1
Start agitator 6, set the temperature of thermostat 4 as 70 DEG C, heater 7 is begun to warm up, and is set when the temperature of thermostat 4 reaches
After constant temperature degree, heater 7 is automatically stopped heating, and polymerisation one and polymerisation two start to react；
Temperature control one：A wherein circulation pipe 9 is to the temperature control of polymerisation one, and the power setting of circulating pump 11 is 30%, DCS system
Required to calculate the heating power of after-heater 12 according to the temperature control of polymerisation one, heated recirculated water is through circulation pipe 9 to poly-
Close reaction one to be controlled, the recirculated water through heat exchange enters thermostat 4 by return pipe 8；
Temperature control two：An other circulation pipe 9 is to the temperature control of polymerisation two, and temperature control method is as described in above-mentioned temperature control one.
Thermostat temperature control：The measurement signal real-time display of temperature sensor 5 works as perseverance in DCS system in thermostat 4
When the warm temperature of groove 4 allows to fluctuate lower limit less than the design temperature of thermostat 4, the automatic start of heater 7；When the temperature of thermostat 4 is higher than
When design temperature allows to fluctuate the upper limit, the automatic start of small pump 2 in water supply tank 1, water at low temperature enters thermostat 4 in water supply tank 1, right
The temperature of thermostat 4 is cooled；When water level reaches overfall in thermostat 4, the recirculated water of super water level enters moisturizing through overflow pipe 3
Case 1.
Embodiment 2
Polymerisation one：70 DEG C of temperature control
Polymerisation two：70 DEG C of temperature control
Start agitator 6, set the temperature of thermostat 4 as 70 DEG C, heater 7 is begun to warm up, and is set when the temperature of thermostat 4 reaches
After constant temperature degree, heater 7 is automatically stopped heating, and polymerisation one and polymerisation two start to react；
Temperature control one：A wherein circulation pipe 9 is to the temperature control of polymerisation one, and the power setting of circulating pump 11 is 60%, DCS system
Setting after-heater 12 does not start, and recirculated water is controlled through circulation pipe 9 to polymerisation one, and the recirculated water through heat exchange leads to
Cross return pipe 8 and enter thermostat 4；
Temperature control two：An other circulation pipe 9 is to the temperature control of polymerisation two, and temperature control method is as described in above-mentioned temperature control one.
Thermostat temperature control：The measurement signal real-time display of temperature sensor 5 works as perseverance in DCS system in thermostat 4
When the warm temperature of groove 4 allows to fluctuate lower limit less than the design temperature of thermostat 4, the automatic start of heater 7；When the temperature of thermostat 4 is higher than
When design temperature allows to fluctuate the upper limit, the automatic start of small pump 2 in water supply tank 1, water at low temperature enters thermostat 4 in water supply tank 4, right
The temperature of thermostat 4 is cooled；When water level reaches overfall in thermostat 4, the recirculated water of super water level enters moisturizing through overflow pipe 3
Case 1.
Embodiment 3
Polymerisation one：85 DEG C of temperature control
Polymerisation two：70 DEG C of temperature control
Start agitator 6, set the temperature of thermostat 4 as 70 DEG C, heater 7 is begun to warm up, and is set when the temperature of thermostat 4 reaches
After constant temperature degree, heater 7 is automatically stopped heating, and polymerisation one and polymerisation two start to react；
Temperature control one：A wherein circulation pipe 9 is to the temperature control of polymerisation one, and the power setting of circulating pump 11 is 30%, DCS system
Required to calculate the heating power of after-heater 12 according to the temperature control of polymerisation one, heated recirculated water is right by circulation pipe 9
Polymerisation one is controlled, and the recirculated water through heat exchange enters thermostat 4 by return pipe 8；
Temperature control two：An other circulation pipe 9 is to the temperature control of polymerisation two, and the power setting of circulating pump 11 is 60%, DCS system
Setting after-heater 12 does not start, and recirculated water is controlled by circulation pipe 9 to polymerisation two, the recirculated water through heat exchange
Thermostat 4 is entered by return pipe 8；
Thermostat temperature control is the same as embodiment 1.
Claims (6)
1. a kind of olefin polymerization combined type method for controlling reaction temperature, its used device includes thermostat (4), thermostat
(4) circulation loop is connected into overflow pipe (3), water supply tank (1), small pump (2), filling pipe successively；The bottom of thermostat (4)
Portion connects circulating pump (11) by outlet pipe (10)；The top of thermostat (4) side is provided with return pipe (8)；Set in thermostat (4)
There are temperature sensor (5), agitator (6) and heater (7), it is characterised in that：Circulating pump (11) is provided with more, every circulating pump
(11) it is connected with after-heater (12), after-heater (12) connection circulation pipe (9)；
The control method comprises the following steps：
(1) agitator (6) is started, by setting the temperature of thermostat (4), heater (7) is begun to warm up, when in thermostat (4)
After temperature reaches design temperature, heater (7) is automatically stopped heating, and multiple polymerisations start to react；
(2) temperature control
Circulation pipe (9) carries out temperature control to multiple polymerisations, and DCS system requires according to the temperature control of polymerisation, calculates each two
The heating power of secondary heater (12), heated recirculated water is controlled through circulation pipe (9) to polymerisation, through heat exchange
Recirculated water enters thermostat (4) by return pipe (8)；
(3) thermostat temperature control
The measurement signal real-time display of thermostat (4) interior temperature sensor (5) is in DCS system, and when thermostat (4), temperature is less than
When thermostat (4) design temperature allows to fluctuate lower limit, heater (7) automatic start；When thermostat (4), temperature is higher than design temperature
When allowing to fluctuate the upper limit, small pump (2) automatic start, the water at low temperature in water supply tank (1) enters thermostat (4), to thermostat (4)
Temperature is cooled；When the interior water level of thermostat (4) reaches overfall, the recirculated water of super water level enters water supply tank through overflow pipe (3)
(1)。
2. device used in the olefin polymerization combined type method for controlling reaction temperature described in a kind of claim 1, including perseverance
Warm groove (4), thermostat (4) connect into one and are recycled back to overflow pipe (3), water supply tank (1), small pump (2), filling pipe successively
Road；The bottom of thermostat (4) connects circulating pump (11) by outlet pipe (10)；The top of thermostat (4) side is provided with return pipe
(8), it is characterised in that：Circulating pump (11) is provided with more, and every circulating pump (11) is connected with after-heater (12), secondary to add
Hot device (12) connection circulation pipe (9).
3. olefin polymerization combined type reaction temperature control device according to claim 2, it is characterised in that：Thermostat
(4) side offers form (14).
4. device according to claim 2, it is characterised in that：The top of thermostat (4) is provided with dismountable cover plate (15).
5. device according to claim 2, it is characterised in that：Heating tube (13) is provided with after-heater (12).
6. device according to claim 2, it is characterised in that：Various types of signal in combined type reaction temperature control device with
Control unit is connected by DCS, and remote control operation is carried out to the water-bath of combined type temperature control.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610490022.XA CN107537413B (en) | 2016-06-29 | 2016-06-29 | Olefin polymerization combined type method for controlling reaction temperature and device |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610490022.XA CN107537413B (en) | 2016-06-29 | 2016-06-29 | Olefin polymerization combined type method for controlling reaction temperature and device |
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| Publication Number | Publication Date |
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| CN107537413A true CN107537413A (en) | 2018-01-05 |
| CN107537413B CN107537413B (en) | 2019-07-30 |
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Citations (7)
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| CN1657146A (en) * | 2004-12-30 | 2005-08-24 | 清华大学 | Material mixing system |
| US20140014089A1 (en) * | 2011-03-30 | 2014-01-16 | Japan Oil, Gas And Metals National Corporation | Temperature control system, hydrocarbon synthesis reaction apparatus, hydrocarbon synthesis reaction system, and temperature control process |
| CN203629026U (en) * | 2013-12-23 | 2014-06-04 | 新特能源股份有限公司 | Heat conduction oil electric heating and circulating device in cold hydrogenation |
| CN103933916A (en) * | 2014-04-04 | 2014-07-23 | 金发科技股份有限公司 | Heating-cooling method and heating-cooling system utilizing fused salt as carrier |
| CN204084857U (en) * | 2014-07-31 | 2015-01-07 | 广东万木新材料科技有限公司 | A kind of conduction oil temperature-controlling system |
| CN104667855A (en) * | 2015-01-20 | 2015-06-03 | 湖南省南岭化工集团有限责任公司 | Heat-conducting oil transport system for reaction kettle |
| CN204693821U (en) * | 2015-05-28 | 2015-10-07 | 常州市凯凯照明电器有限公司 | Heat carrier heating system |
-
2016
- 2016-06-29 CN CN201610490022.XA patent/CN107537413B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1657146A (en) * | 2004-12-30 | 2005-08-24 | 清华大学 | Material mixing system |
| US20140014089A1 (en) * | 2011-03-30 | 2014-01-16 | Japan Oil, Gas And Metals National Corporation | Temperature control system, hydrocarbon synthesis reaction apparatus, hydrocarbon synthesis reaction system, and temperature control process |
| CN203629026U (en) * | 2013-12-23 | 2014-06-04 | 新特能源股份有限公司 | Heat conduction oil electric heating and circulating device in cold hydrogenation |
| CN103933916A (en) * | 2014-04-04 | 2014-07-23 | 金发科技股份有限公司 | Heating-cooling method and heating-cooling system utilizing fused salt as carrier |
| CN204084857U (en) * | 2014-07-31 | 2015-01-07 | 广东万木新材料科技有限公司 | A kind of conduction oil temperature-controlling system |
| CN104667855A (en) * | 2015-01-20 | 2015-06-03 | 湖南省南岭化工集团有限责任公司 | Heat-conducting oil transport system for reaction kettle |
| CN204693821U (en) * | 2015-05-28 | 2015-10-07 | 常州市凯凯照明电器有限公司 | Heat carrier heating system |
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| CN107537413B (en) | 2019-07-30 |
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