CN109806609A - A solution-polymerized rubber stripping kettle device and pressure control method thereof - Google Patents
A solution-polymerized rubber stripping kettle device and pressure control method thereof Download PDFInfo
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- CN109806609A CN109806609A CN201811000137.1A CN201811000137A CN109806609A CN 109806609 A CN109806609 A CN 109806609A CN 201811000137 A CN201811000137 A CN 201811000137A CN 109806609 A CN109806609 A CN 109806609A
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working
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Abstract
本发明公开了一种溶聚橡胶汽提釜装置及其压力控制方法，溶聚橡胶汽提单元由汽提首釜、汽提末釜以及胶粒水罐组成，其中汽提首釜底部的出口管通过第一输送泵连接着汽提末釜进口，汽提末釜底部的出口管通过第二输送泵连接着胶粒水罐，胶粒水罐底部的出口管通过第三输送泵将胶粒水输送至后处理单元，蒸汽喷射泵的进口连接着驱动中压蒸汽管，蒸汽喷射泵的出口管连接着汽提首釜下部的进口，汽提末釜上部的出口管连接着蒸汽喷射泵的进口，在汽提末釜与胶粒水罐罐体之间的上部连接着汽相平衡管。本发明可以避免受汽提首釜压力波动的影响，同时采用负压操作，汽化推动力大延长胶粒的停留时间，使溶剂油脱除彻底，强化汽提末釜内蒸，回收蒸汽热量。
The invention discloses a solution-polymerized rubber stripping kettle device and a pressure control method thereof. The solution-polymerized rubber stripping unit is composed of a first stripping kettle, a final stripping kettle and a colloidal water tank, wherein an outlet at the bottom of the first stripping kettle is provided. The pipe is connected to the inlet of the stripping kettle through the first delivery pump, the outlet pipe at the bottom of the stripping kettle is connected to the rubber granule water tank through the second delivery pump, and the outlet pipe at the bottom of the rubber granule water tank passes through the third delivery pump. The water is sent to the post-processing unit, the inlet of the steam jet pump is connected to the driving medium pressure steam pipe, the outlet pipe of the steam jet pump is connected to the inlet of the lower part of the first stripping kettle, and the outlet pipe of the upper part of the stripping kettle is connected to the outlet of the steam jet pump. At the inlet, a vapor phase balance pipe is connected to the upper part between the stripping kettle and the colloidal water tank. The invention can avoid the influence of the pressure fluctuation of the first kettle of the stripping, and simultaneously adopts the negative pressure operation, the vaporization driving force is large, the residence time of the colloidal particles is prolonged, the solvent oil is completely removed, the steaming in the kettle at the end of the stripping is strengthened, and the steam heat is recovered.
Description
Technical field
The present invention relates to synthesis solution polymerized rubbers, belong to solution polymerized rubber stripping kettle device and its pressure controling mode, especially
A kind of solution polymerized rubber stripping kettle device and its compress control method.
Background technique
Solution polymerized rubber refers to producing synthetic rubber by polymerisation in solution.Be by polymerized monomer under the action of catalyst, lead to
It crosses polymerisation in solution and prepares rubber.It polymerize in glue in addition to containing polymer rubber, the monomer also completed containing solvent and unreacted.
In order to separate solvent and unreacted monomer.Glue in solution polymerized rubber production generally uses elutriation method to complete solvent and rubber production
The separation of product.Glue containing solvent sprays into the stripping vessel with stirring, same to hot water, steam mixing under the action of stirring,
Water as a heat transfer medium, has as pumped (conveying) medium, with vapor by solvent, monomer flash of steam, cools back into kettle top vapour phase
It receives, the rubber after removing solvent becomes rubber grain and suspends in the hot water, and postorder workshop section is sent to be further dried as finished product.
Energy consumption (steam consumption) and material consumption (solvent oil consumption) occur mainly in stripping process in solution polymerized rubber production process.
It needs to recycle solvent naphtha and unreacted monomer vapor from kettle top vapour phase by a large amount of steam and hot water.Glue removing
Become rubber grain after solvent naphtha to suspend in water, remaining solvent naphtha is lower in rubber grain, the solvent oil consumption of device
It is lower.And oil content height can bring environmental protection and safety operation problem to the drying process of post-processing in glue.Micelle after stripping
In solvent oil content need it is more lower better.The removing of solvent naphtha is carried out by the stripping of vapor, so steam stripping unit consumes
With a large amount of vapor, the steam stripped vapor volume that is passed through is big, and the postorder condensation cooling heat exchanger of stripping kettle top needs to consume a large amount of cold
But water also increases energy consumption.The main energy consumption of solution polymerized rubber device is just in steam stripping unit.
In glue elutriation stripping process, rubber experienced several stages such as dispersion, heat absorption and vaporization.Glue divides in the medium
It dissipates and forms the glue drop stage: due to the addition of water or vapor, being broken into the rubber of the equal very little of polarity and solvent in water
For glue drop one by one, this stage is substantially a liquid-liquid dispersions process.The flowing of this process heat is substantially with water to glue
Liquid conducts heat, reduces based on temperature difference, less with energy, but is affected to subsequent process.If dispersion effect is bad,
Subsequent process just needs higher temperature with augmentation of heat transfer, guarantees the precipitation effect of solvent naphtha, to need more heats；
Solvent evaporation forms the oil-containing micelle stage: after glue is in addition to being dispersed into glue drop by the effect of water or vapor, from wherein
Absorb heat, make glue drip in solvent evaporation, into ambient liquid phase.It will form the crowd from inside micelle to surface after solvent evaporation
More pores form the loose spongiform oil-containing micelle that solvent content substantially reduces；Into the solvent vapo(u)r and water of liquid phase main body
Steam passes through the material in kettle together and reaches kettle top vapor phase space；
Oil-containing micelle continues to remove the solvent naphtha stage: still contain about 5% solvent naphtha in preliminary molding solid-state micelle, it will also be after
Continuous recycling solvent therein, until solvent content drops to permissible value.Point of the solvent inside oil-containing micelle to surface before this
Son diffusion enters micelle surface inside oil-containing micelle, and then vaporization enters vapour phase.This is one very slow in multihollow polymer latex particles
Molecule diffusion process.This is the rate-determining steps of entire stripping process.
By above-mentioned 3 stages, the task of recycling design and extraction rubber from glue is completed.It can be seen that elutriation
Stripping is the process that an existing mass transfer has heat transfer again, each process is different, needs that different means is taken to strengthen passing
Hot mass transfer process, to reach energy-efficient purpose.
Strip that first kettle mainly completes be glue dispersion and most of solvent naphtha volatilization process.Free solvent in glue
Oil and the solvent naphtha on micelle surface obtain heat fast vaporizing, and 95% or more solvent naphtha is stripping first kettle vaporization, this process is very
Fastly.The too long residence time is not needed, first kettle is stripped and does not need seemingly too greatly, but it is molten to use glue that can strengthen using vapour phase charging
The flash distillation of agent oil, the volume at this time stripping first kettle are big.
It strips last kettle and micelle water pot is responsible for the removing of remaining solvent naphtha, stripping last kettle, micelle is molded, becomes porous
Loose rubber grain.It is rate-determining steps that solvent naphtha is spread from micelle interior.It needs to reinforce vaporization driving force.
Micelle water pot primarily serves the buffering with post-processing drying unit, and extends the residence time of micelle, guarantees glue
Solvent naphtha removing is thorough in grain.
Three kettle stripper plants in commercial plant, two kettle vapour phases enter first kettle, and the pressure of two kettles is high, and temperature is high, by first kettle
Pressure fluctuations are big.Two kettle pressure are high, and the motive force of solvent naphtha vaporization is insufficient, are unfavorable for lowering solvent oil content in micelle.
Summary of the invention
The purpose of the present invention is to provide a kind of solution polymerized rubber stripping kettle device and its pressure controling mode, structure is closed
Reason, the present invention can be influenced to avoid by first kettle pressure oscillation is stripped, while use negative-pressure operation, and vaporization driving force is big, extends
The residence time of micelle makes solvent naphtha removing thoroughly, strengthens to strip and steam in last kettle, recovered steam heat.
The object of the present invention is achieved like this: a kind of solution polymerized rubber stripping kettle device, including solution polymerized rubber steam stripping unit
It is made of stripping head kettle, stripping end kettle and micelle water pot with glue import and stripping kettle top vapor phase exit, wherein stripping
The outlet in first bottom portion is connected to strip last kettle import by the first delivery pump, and the outlet for stripping last bottom portion passes through second
Delivery pump is connected to micelle water pot, and micelle water is delivered to post-processing list by third delivery pump by the outlet of micelle water pot bottom
Member, the import of steam jet pump are connected to driving middle pressure steam pipe, and the outlet of steam jet pump is connected to strip first kettle lower part
Import, the outlet for stripping last kettle top is connected to the import of steam jet pump, strip last kettle and micelle water pot tank body it
Between top be connected to vapor phase equilibrium pipe.
A kind of compress control method of solution polymerized rubber stripping kettle device when operation, strips last kettle and micelle water pot and through transport
Row, in negative pressure state, pressure is 80-95 kPaA, steam injection for the steam jet pump operation that vapour phase is driven by middle pressure steam
Progress of connecting with the first kettle of stripping is pumped, strips last kettle in negative pressure state operation, it is first that the stripping end kettle steam heat of recycling supplies stripping
Kettle strips last kettle vapour phase and enters the first kettle of stripping after the steam jet pump pressurization that middle pressure steam drives.
The operating temperature for stripping first kettle is 91-99 DEG C, pressure 0.04-0.1MPa, and the operating temperature for stripping last kettle is 93-
97 DEG C, pressure is 80-95 kPaA, and the operating temperature of micelle water pot is 94-98 DEG C, and pressure is 80-95 kPaA.
Strip the last kettle of first kettle, stripping, the volume of micelle water pot is respectively 60-100m3,60-100m3,60-150m3.
First kettle is being stripped, is stripping to be respectively provided on last kettle and micelle water pot and be driven by the power mechanism that motor, speed reducer form
Dynamic agitating shaft, is arranged stirring blade on the intracorporal agitating shaft of above-mentioned tank.
Steam stripping unit of the invention is formed by stripping first kettle, stripping end kettle, micelle water pot, strips first autoclave body product greatly, glue
It is fed using vapour phase, strengthens the flash distillation of glue solvent naphtha；Last kettle is stripped in operation and the parallel running of micelle water pot, vapour phase pass through
The steam jet pump operation of middle pressure steam driving flash distillation amount at the top of negative pressure state, micelle water pot is little, and vapour phase is the same as the last kettle of stripping
The first kettle of stripping is led in parallel connection, steam jet pump outlet, with the first kettle series operation of stripping；Strip last kettle and micelle water pot gas phase simultaneously
Connection is operated in negative pressure state, pressure 80-95kPaA；Steam jet pump of the last kettle vapour phase by middle pressure steam driving is stripped to increase
Enter after pressure and strips first kettle；Steam stripping unit is formed by stripping first kettle, stripping end kettle, micelle water pot.Volume be respectively 60-100m3,
60-100m3,60-150m3 ；Stripping first kettle temperature degree is 91-99 DEG C, and the last kettle temperature degree of pressure 0.04-0.1Mpa, stripping is 93-97
DEG C, pressure 80-95kPaA, micelle water tank temperature are 94-98 DEG C, pressure 80-95kPaA.Solution polymerized rubber stripping vessel in this way
Pressure controling mode, solvent oil consumption can be reduced to 40kg/ xanthan hereinafter, steam consumption is below 3 tons/xanthan.
The invention avoids being influenced by first kettle pressure oscillation is stripped, while negative-pressure operation is used, vaporization driving force is big, prolongs
The residence time of long micelle makes solvent naphtha removing thoroughly, strengthens to strip and steam in last kettle, recovered steam heat.
Detailed description of the invention
Below in conjunction with attached drawing, the present invention will be further described, and Fig. 1 is schematic view of the front view of the present invention.
Specific embodiment
Embodiment 1
Referring to Fig. 1, a kind of solution polymerized rubber stripping kettle device and its pressure controling mode, the specific steps are as follows:
Steam stripping unit is formed by stripping first kettle, stripping end kettle, micelle water pot.Last kettle and micelle water pot and through transport are stripped in operation
Row, in negative pressure state, it is first that stripping is led in steam jet pump outlet for the steam jet pump operation that vapour phase is driven by middle pressure steam
Kettle, with the first kettle series operation of stripping.To reach recycling stripping kettle top steam heat, the purpose of steam consumption is reduced.It strips simultaneously
Last kettle operation is also beneficial to reinforcing and strips end kettle flash distillation, the last kettle steam heat of recycling stripping, which is given, strips first kettle in negative pressure state.Glue
Flash distillation amount is little at the top of grain water pot, and vapour phase is in parallel with last kettle is stripped.
It is in parallel with micelle water pot gas phase to strip last kettle, operates in negative pressure state, pressure 80-95kPaA.
Stripping first kettle temperature degree is 91-99 DEG C, and the last kettle temperature degree of pressure 0.04-0.1Mpa, stripping is 93-97 DEG C, pressure 80-
95kPaA, micelle water tank temperature are 94-98 DEG C, pressure 80-95kPaA.
Claims (5)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811000137.1A CN109806609A (en) | 2018-08-30 | 2018-08-30 | A solution-polymerized rubber stripping kettle device and pressure control method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811000137.1A CN109806609A (en) | 2018-08-30 | 2018-08-30 | A solution-polymerized rubber stripping kettle device and pressure control method thereof |
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| CN109806609A true CN109806609A (en) | 2019-05-28 |
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| CN201811000137.1A Pending CN109806609A (en) | 2018-08-30 | 2018-08-30 | A solution-polymerized rubber stripping kettle device and pressure control method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113082741A (en) * | 2019-12-23 | 2021-07-09 | 中国石油天然气股份有限公司 | Sizing material processing equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113082741A (en) * | 2019-12-23 | 2021-07-09 | 中国石油天然气股份有限公司 | Sizing material processing equipment |
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