CN103408680A - Energy-saving and high-efficiency self-cleaning polymerization process - Google Patents
Energy-saving and high-efficiency self-cleaning polymerization process Download PDFInfo
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- CN103408680A CN103408680A CN2013103771355A CN201310377135A CN103408680A CN 103408680 A CN103408680 A CN 103408680A CN 2013103771355 A CN2013103771355 A CN 2013103771355A CN 201310377135 A CN201310377135 A CN 201310377135A CN 103408680 A CN103408680 A CN 103408680A
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Abstract
The invention relates to an energy-saving and high-efficiency self-cleaning polymerization process which is characterized in that a shell and tube reactor is adopted as a polymerization device, and a rotor type strengthened heat transfer and self-cleaning device is arranged in a tube pass of the shell and tube reactor; when a material participating the polymerization enters the tube pass, a rotor rotates in a tube pass reaction liquid by depending on a suspension mechanism, the probability that the tube pass fluid attaches to the tube wall is reduced by depending on high flowing speed in a gap between the tube wall and the rotor and a spiral pushing action of a rotor blade to the tube pass fluid, the phenomenon that attachment on the tube wall is avoided; reaction fluids of different viscosities can be in large-area mutual contact by depending on a shearing and crushing action of the rotor blade to the reaction fluid, mass transfer between the reaction fluids of different viscosities is frequent and easy by depending on the turbulent flow of the blade, the polymerization is thorough, the function of a stirring rod in chemical reaction is realized, and the reaction rate is greatly increased.
Description
Technical field
The present invention relates to a kind of polymerization process, be specifically related to a kind of technique of energy-conservation, efficient, automatically cleaning polymerization.
Background technology
Panoramic macromolecular material product in the modern life, occurs, comprised rubber, plastics, fiber, coating, tackiness agent and polymer-based composite etc.Usually a kind of method adopted when producing macromolecular material is exactly polyreaction, is all to adopt polyreaction to prepare as plastics (PVC), trevira etc.
In the process of polyreaction, sticky still problem is a large obstacle of limit polymerization reaction development always.In the polyreaction of any technique, (as, other positions of reaction vessel inwall, whipping device, aggregation container) all inevitably can produce polymkeric substance plasticizing sheet so long as the place of monomer contact deposition or adhesion (and sticky still phenomenon).As can be known according to current research level, temperature of reaction, reaction times, the bright and clean degree of reactor all can affect the severity of sticky still.
Below take the sticky still problem that modal polyvinyl chloride (PVC) occurs in the polyreaction of polyvinyl chloride as example illustrates in polyreaction its pros and cons of analyzing and researching.
The production of polyvinylchloride mainly contains two kinds of preparation technologies, the one, calcium carbide route; The 2nd, ethylene process, main raw material are oil.On world market, the production of PVC mainly be take ethylene process as main, and domestic rich coal, the endowment of resources oil-poor, weak breath of being subjected to limits, and mainly take calcium carbide route as main.According to practical experience, in calcium carbide (CaC2) legal system is got the production of PVC, there will be sticky still problem in various degree.
Sticky still is that polymkeric substance forms dirt at the polymeric kettle inwall, can cause heat transfer coefficient to descend, and carries out thereby affect reaction, reduces output; Stripping, drying process discharging difficulty; The wall dirt is sneaked in finished product series of problems such as reducing the polyvinyl chloride resin quality.Autocontrol performance, reduction production capacity and plant factor that this not only affects polymeric kettle, affect quality product, and the cleaning polymeric kettle has also increased labour cost, and causes the harm problem of vinylchlorid (VCM) to clear still personnel, has larger potential safety hazard.All the time, the urgent problem solved of people.
Different times, people have taked various methods to solve sticky still problem.In early days, people mainly adopt small-sized polymerization kettle to produce polyvinyl chloride resin, for normal heat transfer and the stirring that keeps polymeric kettle runs well, adopt the clear method of 1 still 1, so time-consuming taking a lot of work.Afterwards, the external method of spraying the clear still of wall that adopts, used water blast gun, with the high pressure water of 30MPa, sprays from manhole, to remove sticky wall thing in still, reduces artificial clear still number of times.At present, adopt still release agent to solve problem, by still wall spraying still release agent, reducing or eliminating sticky still problem more.But also there is following problem in it:
1. the viscosity fastness of anti-stick coating is low, easily sneaks in product, reduces the purity of product, and affects the effect of release agent.
2. the anti oxidation time deficiency, can make release agent lose efficacy in advance, causes quality product to descend.
3. colour cast problem, polymerization process floating coat thing can be abraded to be fallen in still, and dark still release agent may pollute resin (as " American Red ", " Britain's indigo plant "), may therefore pollute resin and make resin partially red or partially blue, affects the color and luster of goods.
4. operational difficulty while using, need hand spray, and can't guarantee the homogeneity and the integrity that spray.
In order to change above-mentioned deficiency, the present invention proposes a kind of efficient energy-saving automatically cleaning polymerization technique.
Summary of the invention
The objective of the invention is to propose a kind of efficient energy-saving automatically cleaning polymerization technique, this technique has been abandoned and has been usingd the method for conventional polymeric still as polymerizing reactor, adopt shell and tube reactor as reaction unit, in the reactor tubulation, add a kind of rotor-type enhancement of heat transfer and cleaning apparatus for self, not only can solve sticky still problem, all drawbacks that can also avoid the traditional mode of production mode to bring.
The scheme that realizes above-mentioned purpose is: a kind of efficient energy-saving automatically cleaning polymerization technique, adopt the device of shell and tube reactor as polyreaction, participate in the material of polyreaction and walk tube side, cooling fluid is walked shell side, cooling effect by cooling fluid, the heat that polyreaction discharges is taken away fast, thus the production efficiency of raising product.Rotor-type enhancement of heat transfer and cleaning apparatus for self are installed in the tube side of shell and tube reactor, when the material of participating in polyreaction enters in tube side, rotor relies on it from Suspension Mechanism, can in the tube side reacting fluid, rotate, thereby the turbulence intensity of augmenting response fluid, make reacting fluid produce eddy flow, strengthened on the one hand the convective heat exchange between tube side and shell side, on the other hand, the high flow rate of dependence tube wall and rotor clearance and the spinner blade spiral pushing effect to tube side fluid, reduced tube side fluid is adhered on tube wall probability, avoided tube wall the phenomenon of the sticky wall of dirt settling to occur.When tube fluid is flowed through rotor, rely on the shear cracking action of spinner blade to reacting fluid, make the reacting fluid of different viscosity large-arealy to be in contact with one another, rely on the flow-disturbing effect of blade, make the mass exchange between the different densities reacting fluid more easily frequent, polyreaction is more thoroughly efficient, has realized the function of stirring rod in the chemical reaction, has greatly improved speed of reaction.
A kind of efficient energy-saving automatically cleaning of the present invention polymerization technique, shell-side fluid and tube side fluid adopt the flow pattern of following current or adverse current.
A kind of efficient energy-saving automatically cleaning of the present invention polymerization technique, tube side fluid is for participating in the material of polyreaction, and the shell side cooling fluid is water coolant, cooling fluid or refrigeration agent.
Embodiment
1.PVC polymerization technique
The water of batching use is sent here and is added the high purity water storage tank again by the pure water workshop, by high purity water, be pumped into the monomer scale tank, by vinylchlorid workshop section, vinyl chloride monomer is delivered to the monomer scale tank, load weighted various auxiliary agent flows in the tube side of shell and tube reactor by transferpump, the rotor that promotes tubulation bundle inside by the fluid effect rotates, by rotor, rotating the turbulent flow formed realizes the cold of material stirred, after finishing, start hot water pump, hot water is sent into to the shell of reactor, when the tube side temperature rise stops hot water pump to temperature of reaction, with water coolant, reaction heat is absorbed, polyreaction continues to carry out, when dropping to 0.1～0.15MPa, reaction pressure can contact discharging.
2.PE polymerization technique
Ethene is flowed in the tube side of shell and tube reactor by transferpump, by the rotor in tubulation, prevent sticky wall and obstruction in the rotation under fluid driven, and add hot water in the shell side of reactor, temperature of reaction is provided, after one period reaction times, the polymer slurries flowed out by the reactor tube side to the powder drying machine, then carries out granulation through flash vaporization kettle, gas-liquid separator.
3. polypropylene (PP) polymerization work
The slurry process of take is example, while to reactor, feeding intake, controls shell side hot water and take and guarantee that temperature of reaction is 50～70 ℃, and the control feed pressure is 0.5～1MPa when reinforced, add simultaneously trace hydrogen, utilize the rotor turning effect that it is fully mixed, reach the effect of regulating relative molecular mass.Reaction also will add alcohols to remove catalyst residue after finishing in other device.
A kind of efficient energy-saving automatically cleaning of the present invention polymerization technique, changed conventional polymerization process, solved the phenomenons such as sticky still, improved the polyreaction quality product, realized energy-conservation, efficient and self-cleaning ability, strong adaptability, but widespread use.
Claims (4)
1. efficient energy-saving automatically cleaning polymerization technique, it is characterized in that: adopt the device of shell and tube reactor as polyreaction, participate in the material of polyreaction and walk tube side, cooling fluid is walked shell side, cooling effect by cooling fluid, the heat that polyreaction discharges is taken away fast, thus the production efficiency of raising product; Meanwhile, rotor-type enhancement of heat transfer and cleaning apparatus for self are installed in the tube side of shell and tube reactor, when the material of participating in polyreaction enters in tube side, rotor relies on it from Suspension Mechanism, can in the tube side reacting fluid, rotate, the high flow rate of dependence tube wall and rotor clearance and the spinner blade spiral pushing effect to tube side fluid, reduce tube side fluid is adhered on tube wall probability, avoided tube wall the phenomenon of the sticky wall of dirt settling to occur.
2. a kind of efficient energy-saving automatically cleaning polymerization technique according to claim 1, it is characterized in that: when tube fluid is flowed through rotor, rely on the shear cracking action of spinner blade to reacting fluid, make the reacting fluid of different viscosity large-arealy to be in contact with one another, rely on the flow-disturbing effect of blade, make the mass exchange between the different densities reacting fluid more easily frequent, polyreaction is more thorough, realize the function of stirring rod in the chemical reaction, greatly improved speed of reaction.
3. a kind of efficient energy-saving automatically cleaning polymerization technique according to claim 1, is characterized in that: the flow pattern of shell-side fluid and tube side fluid employing following current or adverse current.
4. a kind of efficient energy-saving automatically cleaning polymerization technique according to claim 1 is characterized in that: tube side fluid is for participating in the material of polyreaction, and the shell side cooling fluid is water coolant, cooling fluid or refrigeration agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN2013103771355A CN103408680A (en) | 2013-08-27 | 2013-08-27 | Energy-saving and high-efficiency self-cleaning polymerization process |
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| Application Number | Priority Date | Filing Date | Title |
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| CN2013103771355A CN103408680A (en) | 2013-08-27 | 2013-08-27 | Energy-saving and high-efficiency self-cleaning polymerization process |
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| CN103408680A true CN103408680A (en) | 2013-11-27 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015027613A1 (en) * | 2013-08-27 | 2015-03-05 | 北京化工大学 | Self-cleaning polymerization apparatus and process |
| CN112138669A (en) * | 2020-09-30 | 2020-12-29 | 广东石油化工学院 | Method for continuously preparing copper-zinc-aluminum catalyst |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1279693A (en) * | 1997-10-31 | 2001-01-10 | 奥格尼斯公司 | Continuous bulk polymerization process |
| CN1432033A (en) * | 2000-04-04 | 2003-07-23 | 潘尼珀尔有限公司 | Method and appts. for preparing polyaniline |
| CN101968332A (en) * | 2010-09-20 | 2011-02-09 | 北京华夏壹泰科技有限公司 | EHT (Extra High Tension) self-cleaning energy-saving environment-friendly device and manufacture method thereof |
| CN102807631A (en) * | 2012-08-15 | 2012-12-05 | 罗吉尔 | Pipeline-type continuous polymerization reaction method |
-
2013
- 2013-08-27 CN CN2013103771355A patent/CN103408680A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1279693A (en) * | 1997-10-31 | 2001-01-10 | 奥格尼斯公司 | Continuous bulk polymerization process |
| CN1432033A (en) * | 2000-04-04 | 2003-07-23 | 潘尼珀尔有限公司 | Method and appts. for preparing polyaniline |
| CN101968332A (en) * | 2010-09-20 | 2011-02-09 | 北京华夏壹泰科技有限公司 | EHT (Extra High Tension) self-cleaning energy-saving environment-friendly device and manufacture method thereof |
| CN102807631A (en) * | 2012-08-15 | 2012-12-05 | 罗吉尔 | Pipeline-type continuous polymerization reaction method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015027613A1 (en) * | 2013-08-27 | 2015-03-05 | 北京化工大学 | Self-cleaning polymerization apparatus and process |
| CN112138669A (en) * | 2020-09-30 | 2020-12-29 | 广东石油化工学院 | Method for continuously preparing copper-zinc-aluminum catalyst |
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Application publication date: 20131127 |