CN102382214B - Coacervation technology for polymer product production - Google Patents
Coacervation technology for polymer product production Download PDFInfo
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- CN102382214B CN102382214B CN 201110255135 CN201110255135A CN102382214B CN 102382214 B CN102382214 B CN 102382214B CN 201110255135 CN201110255135 CN 201110255135 CN 201110255135 A CN201110255135 A CN 201110255135A CN 102382214 B CN102382214 B CN 102382214B
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Abstract
The invention discloses a coacervation technology for polymer product production, and concretely relates to an energy-saving and consumption reduction process, process conditions and operation modes of the coacervation technology for polymer product production. The coacervation technology for polymer product production is especially suitable for a styrene-butadiene-styrene block copolymer (SBS) production device. The coacervation technology for polymer product production combines a three-reactor differential pressure coacervation technology and a rubber particle coacervation technology, and thus the coacervation technology for polymer product production is a novel, energy-saving and low-energy consumption SBS coacervation technology, can effectively alleviate a contradiction between energy saving and consumption reduction, can reduce solvent consumption and a steam use amount, and can be utilized for a SBS production device of the Yanshan petrochemical company.
Description
Technical field
The invention belongs to polymerization product production process category, be specially adapted to styrene-butadiene-styrene block copolymer (SBS) elutriation method cohesion process.
Background technology
The cohesion process that coacervation prod, particularly SBS industrial installation adopted mainly contains: single still cohesion process, two still cohesion process in parallel and two still series connection cohesion process.Single still cohesion process equipment is few, simple to operate, but energy and material consumption is high; Two still tandem process are easy to control, and energy consumption is higher, and the solvent fluctuation is larger in the glue; Though two still parallel connection technology control difficulty increase, steam consumption is low, and most of advanced SBS production equipment all adopts two stills production technique in parallel at present.
Adopt the cohesion process of two still parallel connections can be divided into according to the difference of operational stage again thermal type cohesion and differential cohesion, the ultimate principle of thermal type and differential cohesion is that the SBS glue is dispersed in the hot water, reaches the purpose of separating solvent and micelle through the complex heat transfer mass transfer process
,The thermal type cohesion mainly utilizes the temperature head between the reactor, and differential cohesion then is pressure difference and the temperature head of having utilized between reactor.
When adopting two still thermal type cohesion, if energy-conservation by working pressure, then the pressure of two stills must improve simultaneously, is unfavorable for solvent vaporization in the micelle, can roll up solvent consumption; Condense in addition the still liquid level and easily fluctuate, impact is steadily produced.And when adopting two differential cohesion of still, 2 cohesion stills can be kept different pressure, can reduce steam consumption by improving first (1#) cohesion still working pressure like this, reduce partial solvent consumption by reducing by second (2#) cohesion still working pressure, but integral body also exists solvent consumption high, the problem that large amount of organic is directly discharged.
Along with the continuous progress of society and the continuous enhancing of people's energy-conserving and environment-protective consciousness, reduction cost, minimizing the product in process of production discharging of " three wastes " become focus and the main direction that enterprise must pay close attention to, and present domestic SBS device cohesion process is compared with external advanced means, therefore still there is larger gap aspect energy consumption, material consumption and the solvent consumption, developing a kind of novel SBS cohesion process and further reduce to consume and become one of hot issue of this area research.
Summary of the invention
The object of the invention is to develop a kind of novel process of novel coacervation prod, it can be used for the SBS cohesion, can better realize the balance of energy consumption and oil consumption, the one-step optimization of going forward side by side adjust each still pressure, temperature, the residence time and hot water, steam utilize scheme, the level of resources utilization and solvent removal effect have been improved, product energy consumption is significantly descended, and every economic and technical norms will be more advanced than two stills cohesion process in parallel.
The invention provides a kind of cohesion process of new coacervation prod, it is characterized in that adopting three still differential pressure cohesion process, after glue from the glue spraying pumping and aftertreatment circulating hot water premix quantitatively spray into first (1#) cohesion still by nozzle, extract out at the bottom of still by impeller pump again, enter successively the further desolvation of second (2#) cohesion still and the 3rd (3#) cohesion still, and the concentrate device is installed between 2#, 3# still micelle water is carried out concentrate, thereby formed energy-saving and cost-reducing type SBS cohesion novel process.In the situation that only increases a small amount of equipment and electric quantity consumption so that the condensed system solvent removal is more thorough, thereby improve the aftertreatment factory building operating environment, reduce the pollution to atmosphere, have simultaneously obvious energy-saving effect.
In the technique of the present invention, 3 cohesion stills are desolvation in different ways, and 1# cohesion still is by reducing service temperature and improve solvent gas phase mole fraction desolvation, and makes the glue cohesion form micelle; 2# cohesion still is by improving pressure and temperature with solvent removal; 3# cohesion still then is by the further prolongation residence time, so that residual separated from solvent out finally reaches the purpose of desolvation in the glue.
Further, technique of the present invention, installing a pipeline additional at 3# cohesion still vapor jet pump pipeline links to each other with 2# still bottom steam line, while installation portion departure valve and electric valve, enter the heating steam of 1# still with minimizing by shunting action, reduce mutually middle water-content of 1# still top gas, can reduce 2# still bottom steam consumption simultaneously, further play energy-saving effect.Wherein pipeline is the DN100 steel pipe.
Further, technique of the present invention, it is characterized in that 2# cohesion still particle water directly enters the concentrate device by impeller pump from the bottom, particle water after concentrate flows into 3# cohesion still from concentrate device top exit, high-temperature-hot-water then returns 1# cohesion still from concentrate device bottom, return discharge and controlled by variable valve.Because 1#, the 2# cohesion still temperature difference is larger, after the part high-temperature-hot-water returns the 1# still, can reduces high-temperature-hot-water heat-energy losses in the working cycle between aftertreatment and cohesion workshop section, thereby further save part heating steam to realize energy conservation object.Coming into operation of the dense device of micelle water extraction can be played buffering and be reduced the effect of flow velocity, reduced simultaneously 3# still entrance water-cement ratio so that the particle water residence time in still after the concentrate further prolong, thereby reach the purpose that reduces solvent in the glue.Utilize the density difference that exists between SBS micelle and the carrier water, micelle water can separate obtaining high density micelle water and the pure carrier water of high temperature through behind the concentrate device, and high-temperature-hot-water returns the effect that can play energy efficient behind the first still of cohesion.
Further, technique of the present invention, it is characterized in that 2# condenses the still top gas and directly returns into 1# still bottom, 3# cohesion still top gas phase then enters 1# still middle part with the vapor jet pump low-pressure steam, solvent gas is steamed by 1# still top at last, through entering the layering of profit layering tank after gas filter, air cooler, the condenser condenses, reach the again extraction and application of solvent and water.Like this, the gas that pushes up from 2#, 3# cohesion still has carried out again heating to the 1# still, so that high-temperature gas obtains second stage employ, has therefore reduced the steam consumption of 1# cohesion still, thereby has played energy-saving effect.
Further, technique of the present invention is characterized in that, the 1# still utilizes still top gas phase variable valve and fan frequency conversion to jointly control the still internal pressure.
Further, technique of the present invention is characterized in that, the 2# still is then controlled the still internal pressure by the gas phase variable valve.
Further, technique of the present invention is characterized in that utilizing vapor jet pump to improve 3# still gas phase energy, reduces 3# still pressure, reaches the purpose that reclaims used heat, save energy, is conducive to again further removing of solvent simultaneously.
Further, technique of the present invention is characterized in that, the temperature regulation of each still of 1-3# all is to be controlled by still bottom steam variable valve.
Further, technique of the present invention is characterized in that, 1# still liquid level relies on into the still hot water flow to be controlled, and 2#, 3# still liquid level then rely between still variable frequency pump to regulate.
Further, the present invention is applicable to continous way production.
Further, technique of the present invention is characterized in that, the working pressure of 1# still is 0.01～0.03Mpa, and temperature is 89 ± 2 ℃.Technique of the present invention is obviously energy-conservation than two still cohesion process, and the working pressure of former pair of still cohesion process 1# still is 0.048～0.054Mpa, and temperature is 98 ± 2 ℃.The reason of control pressure and control drop in temperature is in the technique 1# still of the present invention, and technique of the present invention has enlarged the pressure reduction of solvent saturated vapor pressure and system's vapour pressure in the 1# still, has increased the solvent impellent of vaporizing.The boiling point of solvent hexanaphthene there is no larger impact so keep too high system temperature in the 1# still to the removal effect of solvent about 80 ℃, therefore we all reduce 1# still control temperature and pressure on control condition.
Further, technique of the present invention is characterized in that, the working pressure of 2# still is between the 0.07-0.09Mpa, and temperature is 105 ± 2 ℃.Material enters in the 2# still, keeping higher still temperature is in order to keep higher mass transfer temperature to the solvent in the micelle, for its diffusion mass transfer provides energy, so at high temperature more be conducive to removing of solvent in the SBS particle, suitably improve simultaneously still and press with the steam saving consumption.
Further, technique of the present invention is characterized in that the 3# still do not take the temperature compensation measure.General temperature is 97-100 ℃, and pressure-controlling is at 0.005Mpa ± 0.002Mpa, that is: pressure-controlling is between 0.003Mpa to 0.007Mpa.
Further, technique of the present invention, it is specially adapted to the production of SBS.
Technique of the present invention, for solvent characteristics under the different pressures in subtractive process, three cohesion stills are emphasized particularly on different fields in the solvent removal process, more effectively utilize resource, improve the solvent removal effect, simultaneously owing to the difference in the temperature control, so that the energy-conserving action of cohesion novel process is more outstanding.
Technique of the present invention, 1# still temperature its objective is the ratio that increases solvent in the gas phase than greatly reduced in the past, reduces steam consumption, and the 1# still is obstructed steam under normal circumstances, and its thermal source is mainly from 2# still top stripping vapour and 3# top steam squirt pump low-pressure steam.The 3# still does not generally carry out steam heating, and temperature is not done requirement yet.
Description of drawings
Fig. 1 is the SBS cohesion new technological flow figure with the concentrate device of the present invention.
Fig. 2 is two still thermal type cohesion process schemas.
Fig. 3 is two still differential pressure type cohesion process schemas.
Fig. 4 is cohesion process prioritization scheme of the present invention, wherein installing a pipeline additional at 3# cohesion still vapor jet pump pipeline links to each other with 2# still bottom steam line, while installation portion departure valve and electric valve, enter the heating steam of 1# still with minimizing by shunting action, reduce mutually middle water-content of 1# still top gas, simultaneously can reduce 2# still bottom steam consumption, further play energy-saving effect.
Wherein, 1---first (1#) condenses still; 2---second (2#) condenses still; 3---the 3rd (3#) condenses still; 4---glue; 5---hot water; 6---the LS(low-pressure steam); 7---impeller pump between still; 8---the particle water pump; 9---squirt pump; 10---the concentrate device; 11---gas filter; 12---air cooler; 13---condenser; 14---profit layering tank; 15---the hand valve; 16---electric valve; 17---pipeline.
Embodiment
The below enumerates 1 embodiments of the invention, so as to further specifying its characteristics, but does not limit the scope of the invention with this.
The cohesion process that a kind of polymerization product of the present invention is produced, its technical process is referring to Fig. 1.Wherein, concentrate device manufacturer is Binhai New Area in Tianjin flourishing age east combustion development in science and technology company limited, and model is DR-III.Wherein, each still processing condition is: it is 10 Kpa-30 Kpa that cohesion still still pressure on top surface 1# still is pressed, and the 2# still is pressed and is 70Kpa-90Kpa, and 3# still pressure is 3Kpa-7Kpa; Still temperature 1# still is 89 ± 2 ℃ at the bottom of the cohesion still still, and the 2# still is 105 ± 2 ℃, and the 3# still is 97-100 ℃.
The cohesion process that a kind of polymerization product of the present invention is produced, its unusual effect comprises:
1, great advantage of the present invention is significantly to reduce solvent in the SBS glue, and energy-saving effect is remarkable.In conjunction with the test monitoring data, compare with existing pair of still cohesion process, the present invention only needs a small amount of electric energy that consume more, and SBS product per ton just can reclaim at least 11.3Kg solvent more, simultaneously can reduce steam consumption 4.4t/h, reduction plant energy consumption, material consumption are of universal significance.
2, the micelle extracting and concentrating technology among the present invention has reduced the circulating hot water heat-energy losses, but the average about 0.6t/h of steam saving has reduced solvent in the glue simultaneously, can save solvent 1.3Kg/t.
The cohesion process that a kind of polymerization product of the present invention is produced can make energy consumption and the criterion of the fuel consumption obviously reduce, and specifically adds up as follows:
1, reduces the solvent unit consumption
Through test, cohesion process of the present invention can make the residence time of SBS micelle in the cohesion still prolong 1/3 than two still techniques, and after adding the concentrate device, is not changing in the long-pending situation of cohesion kettle, so that the residence time further prolongs.
Table 1: condense solvent effect factor index contrast (%) in each technique
As seen from Table 1: in the condensed system of SBS device, the three still residence time were 0.75～0.83h, and are obviously long than two still pool times, and the resid amount in the rubber is few.And in three still techniques with the concentrate device, the micelle residence time prolongs again 0.04h, and residual oil content further descends in the glue.
Analytical results is as follows:
Table 2: solvent (%) in " without three still techniques of concentrate device " glue
Table 3: solvent (%) in " with three still cohesion process of concentrate device " glue
From the statistics of table 2 and table 3 as seen: compare with " without three still techniques of concentrate device ", solvent has descended about 0.13% in " with three still cohesion process of concentrate device " glue, show that the concentrate device has played the desolvation effect and effect is obvious, calculate by 0.13%, solvent unit consumption decline 1.3Kg/t after the conversion, effect is remarkable.
In sum, through test, cohesion process co-falling of the present invention hangs down solvent unit consumption 11.3Kg/t.With 6000 yuan/tons of present solvent present prices, device is produced 60000 tons of calculating of oil-filled glue per year, and the benefit that can bring is:
Ten thousand yuan of 6000 * 60000 * 11.3 ÷ 1000=406.8().
2, energy-saving effect
According to steam consumption comparing result in the forward and backward contemporaneity of test as can be known, " with three still cohesion process of concentrate device " of the present invention can make the steam consumption decrease, and energy-saving effect is remarkable.
Table 4: two still cohesion steam consumption cartograms
Table 5: " with three still cohesion process of concentrate device " steam consumption cartogram
From table 4 and as seen from Table 5, existing two still cohesion process have reached the purpose of steam saving by regulating the temperature and pressure of 1# cohesion still.When the glue spraying amount is 38m
3During/h, 1#, 2#, 3# still steam consumption reduce about about 4.4t/h altogether in " with three still cohesion process of concentrate device " of the present invention.Calculated in 300 days to produce in year, but then every year create beneficial result:
Ten thousand yuan of 150 * 300 * 24 * 4.4=475.2()
According to above calculation result, cohesion process of the present invention can bring economic benefit altogether:
406.8+475.2=882(ten thousand yuan).
3, social benefit
Cohesion process of the present invention can reduce lighter hydrocarbons quantity discharged in the aftertreatment, improves the device surrounding enviroment, improves Air quality, and especially the processing pressure of aftertreatment exhaust gas processing device obviously reduces, and can greatly prolong the work-ing life of noble metal catalyst.
Claims (13)
1. the cohesion process produced of a polymerization product, it is characterized in that adopting three still differential pressure cohesion process, after glue from the glue spraying pumping and aftertreatment circulating hot water premix quantitatively spray into first (1#) cohesion still by nozzle, extract out at the bottom of still by impeller pump again, enter successively the further desolvation of second (2#) cohesion still and the 3rd (3#) cohesion still, and between the second cohesion still and the 3rd cohesion still, the concentrate device has been installed so that micelle water is carried out concentrate; The working pressure of the first cohesion still is 0.01～0.03Mpa, and temperature is 89 ± 2 ℃.
2. a cohesion process as claimed in claim 1 wherein installs a pipeline additional at the 3rd cohesion still vapor jet pump pipeline and links to each other with the second cohesion still bottom steam line, simultaneously installation portion departure valve and electric valve.
3. one kind such as claim 1,2 one of them described cohesion process, it is characterized in that, the second cohesion still particle water directly enters the concentrate device by impeller pump from the bottom, particle water after concentrate flows into the 3rd cohesion still from concentrate device top exit, high-temperature-hot-water then returns the first cohesion still from concentrate device bottom, return discharge and controlled by variable valve.
4. one kind such as claim 1,2 one of them described cohesion process, it is characterized in that, the second cohesion still top gas is directly returned into the first cohesion still bottom, the 3rd cohesion still top gas phase then enters the first cohesion still middle part with the vapor jet pump low-pressure steam, solvent gas is steamed by the first cohesion still top at last, through entering the layering of profit layering tank after gas filter, air cooler, the condenser condenses.
5. one kind such as claim 1,2 one of them described cohesion process, it is characterized in that, the first cohesion still utilizes still top gas phase variable valve and fan frequency conversion to jointly control the still internal pressure.
6. one kind such as claim 1,2 one of them described cohesion process, it is characterized in that, the second cohesion still is then controlled the still internal pressure by the gas phase variable valve.
7. one kind such as claim 1,2 one of them described cohesion process, it is characterized in that, utilizes vapor jet pump to improve the 3rd cohesion still gas phase energy.
8. one kind such as claim 1,2 one of them described cohesion process, it is characterized in that, the temperature regulation of each still all is to be controlled by still bottom steam variable valve in the first to the 3rd cohesion still.
9. one kind such as claim 1,2 one of them described cohesion process, it is characterized in that, the first cohesion still liquid level relies on into the still hot water flow to be controlled, and the second and the 3rd cohesion still liquid level then relies between still variable frequency pump to regulate.
10. one kind such as claim 1,2 one of them described cohesion process, it is characterized in that, the working pressure of the second cohesion still is between the 0.07-0.09Mpa, and temperature is 105 ± 2 ℃.
11. one kind such as claim 1,2 one of them described cohesion process, it is characterized in that, the 3rd cohesion still is not taked the temperature compensation measure.
12. one kind such as claim 1,2 one of them described cohesion process, it is characterized in that the temperature of the 3rd cohesion still is 97-100 ℃, pressure-controlling is at 0.005Mpa ± 0.002Mpa.
13. one kind such as claim 1,2 one of them described cohesion process, it is specially adapted to the production of styrene-butadiene-styrene block copolymer (SBS).
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| CN106039916B (en) * | 2016-07-26 | 2019-04-12 | 北京华福工程有限公司 | The system for reducing non-methane total hydrocarbons waste gas content in polymerisation in solution rubber process |
| CN107793498B (en) * | 2016-09-06 | 2019-11-12 | 中国石油化工股份有限公司 | A kind of method and apparatus of rubber polymer cohesion |
| CN107793504B (en) * | 2016-09-06 | 2019-09-27 | 中国石油化工股份有限公司 | A kind of device of rubber polymer cohesion |
| CN107459593B (en) * | 2017-08-18 | 2023-04-18 | 中国石油天然气股份有限公司吉林石化分公司 | Chlorosulfonated polyethylene wet coagulation aftertreatment system with undersize wet glue particle recovery device |
| CN109806609A (en) * | 2018-08-30 | 2019-05-28 | 新疆寰球工程公司 | A kind of solution polymerized rubber stripping kettle device and its compress control method |
| CN112142877B (en) * | 2019-06-27 | 2022-09-20 | 中国石油化工股份有限公司 | Coagulation method for butadiene rubber solution |
| CN110938158B (en) * | 2019-12-18 | 2022-02-08 | 浙江信汇新材料股份有限公司 | Method and equipment for coagulating halogenated butyl rubber |
| CN115197345B (en) * | 2022-07-14 | 2024-06-25 | 湖南百利工程科技股份有限公司 | Energy-saving method for coagulation process in synthetic rubber production |
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