CN203264671U - EVOH (Ethylene-Vinyl Alcohol Copolymer) production system - Google Patents
EVOH (Ethylene-Vinyl Alcohol Copolymer) production system Download PDFInfo
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- CN203264671U CN203264671U CN 201320180104 CN201320180104U CN203264671U CN 203264671 U CN203264671 U CN 203264671U CN 201320180104 CN201320180104 CN 201320180104 CN 201320180104 U CN201320180104 U CN 201320180104U CN 203264671 U CN203264671 U CN 203264671U
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- autoclave
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Abstract
The utility model discloses an EVOH (Ethylene-Vinyl Alcohol Copolymer) production system. The EVOH production system is composed of a vinyl acetate monomer storage tank, a methanol storage tank, an initiator storage tank, a high-pressure reaction kettle, an ethylene gas bottle, a nitrogen gas bottle, a feed port, a temperature sensor, a pressure sensor, a liquid level sensor, a stirrer, a manual bottom valve, a small flow control valve, a resin collection groove, a balance scale and an ethylene intake control valve, wherein the vinyl acetate monomer storage tank, the methanol storage tank and the initiator storage tank are directly connected with the high-pressure reaction kettle respectively; the nitrogen gas bottle is directly connected with the high-pressure reaction kettle; the ethylene gas bottle is connected with the high-pressure reaction kettle through the ethylene intake control valve; the manual bottom valve and the small flow control valve are arranged at the bottom of the high-pressure reaction kettle; an inlet of the small flow control valve is directly connected with the manual bottom valve; an outlet of the small flow control valve is connected with the resin collection groove which is positioned on the balance scale. The EVOH production system realizes continuous production, low energy consumption and high efficiency and also realizes reduction in cost, thus, the stable production is realized and the rate of finished products is high.
Description
Technical field
The utility model relates to a kind of EVOH production system, relates in particular to a kind of production system of producing EVOH with continuous polymerization.
Background technology
The ethylene/vinyl alcohol copolymer also claims EVOH, is the modifier of ethylene-vinyl acetate copolymer (EVA) or PVA, and in its structure, ethylene contents is generally 25%～50%(molar percentage, and is lower same; Corresponding mass percentage is 20%～40%), be a kind of novel high polymer synthetic material that integrates the barrier properties for gases of polyvinyl processability and vinyl alcohol polymer.At present, preparation EVOH adopts single still intermittence type polymerization more, and this preparation method's energy consumption is high, and yield rate is low, and production cost is high, inefficiency.
The utility model content
In view of the foregoing defects the prior art has, the utility model aims to provide the EVOH production system that a kind of yield rate is high, energy consumption is low, production efficiency is high.
To achieve these goals, the utility model by the following technical solutions: the EVOH production system is comprised of VAM storage tank, methyl alcohol storage tank, initator storage tank, autoclave, ethene gas cylinder, nitrogen gas cylinder, manual bottom valve, control valve for small flows, resin feeder, a day gentle ethene air intake control valve; Described VAM storage tank, methyl alcohol storage tank and initator storage tank directly are connected with autoclave respectively; Described nitrogen gas cylinder directly is connected with autoclave, and described ethene gas cylinder is connected with described autoclave by the ethene air intake control valve; At the bottom of described autoclave still, manual bottom valve and control valve for small flows are arranged, described control valve for small flows import directly is connected with described manual bottom valve, described Small Flow Control valve outlet port threaded tree fat feeder, and described resin feeder is positioned on balance.
As the improvement to the technical program, be provided with charging aperture, temperature sensor, pressure sensor and liquid level sensor on described autoclave; Be provided with agitator in described autoclave.
Compared with the prior art, the utility model has been owing to having adopted technique scheme, the continuous production that made whole process implementation, and energy consumption is low, and production efficiency is high, effectively reduces production cost, makes production more stable, and yield rate is higher.
Description of drawings
Fig. 1 is the structural representation of the utility model embodiment E VOH production system.
In figure: 1 VAM storage tank, 2 methyl alcohol storage tanks, 3 initator storage tanks, 4 autoclaves, 5 ethene gas cylinders, 6 nitrogen gas cylinders, 7 charging apertures, 8 temperature sensors, 9 pressure sensors, 10 liquid level sensors, 11 agitators, 12 manual bottom valves, 13 control valve for small flows, 14 resin feeders, 15 balances, 16 ethene air intake control valves.
The specific embodiment
Below by embodiment, the utility model is carried out concrete description; be necessary to be pointed out that at this following examples only are used for the utility model is further detailed; can not be interpreted as the restriction to the utility model protection domain, those skilled in the art can make some nonessential improvement and adjustment to the utility model according to foregoing.
Embodiment: a kind of EVOH production system, as shown in Figure 1, the EVOH production system is comprised of VAM storage tank 1, methyl alcohol storage tank 2, initator storage tank 3, autoclave 4, ethene gas cylinder 5, nitrogen gas cylinder 6, manual bottom valve 12, control valve for small flows 13, resin feeder 14, balance 15 and ethene air intake control valve 16; Described VAM storage tank 1, methyl alcohol storage tank 2 and initator storage tank 3 directly are connected with autoclave 4 respectively; Described nitrogen gas cylinder 6 directly is connected with autoclave 4, and described ethene gas cylinder 5 is connected with described autoclave 4 by ethene air intake control valve 16; At the bottom of described autoclave 4 stills, manual bottom valve 12 and control valve for small flows 13 are arranged, described control valve for small flows 13 imports directly are connected with described manual bottom valve 12, described control valve for small flows 13 outlets connect resin feeder 14, and described resin feeder 14 is positioned on balance 15.
For production system pressure, temperature and liquid level are realized accurately controlling, be provided with charging aperture 7, temperature sensor 8, pressure sensor 9 and liquid level sensor 10 on described autoclave 4; Be provided with agitator 11 in described autoclave 4.
Can automatically control the aperture of control valve for small flows 13 by balance 15 at the bottom of autoclave 4 stills, the assurance reaction system is stablized and liquid level equilibrium.
Described VAM storage tank 1, methyl alcohol storage tank 2 and initator storage tank 3 consist of aggregate-storing system.Aggregate-storing system is by the speed continuous charging of a high-pressure pump realization according to appointment.
By described ethene air intake control valve 16, described ethene gas cylinder 5 according to the automatic make-up ethylene of variation of Expenditure Levels and the pressure of ethene, is kept reacting balance in course of reaction.
Adopt this EVOH production system to produce EVOH with continuous polymerization, carry out as follows:
1, squeeze into 0.72～0.93 part of VAM by high-pressure pump through VAM storage tank 1 in autoclave 4, squeeze into 0.07～0.28 part of methyl alcohol by high-pressure pump through methyl alcohol storage tank 2 in autoclave 4, start in still agitator 11 rotating speed be under 150～200rpm stirring at normal temperature 10～30min to mix;
2, the nitrogen 6～10bar in nitrogen gas cylinder 6 is passed in autoclave 4 replace twice, the vinyl monomer 6～10bar in ethene gas cylinder 5 is passed in autoclave 4 replace twice, each displacement continues 2～6min;
3, the vinyl monomer in ethene gas cylinder 5 is passed into autoclave 4, controlling the still internal pressure by pressure sensor 9 is 28～60bar, when temperature in the kettle reaches reaction temperature and is 45～80 ℃, 0.0005～0.003 part of the initator in initator storage tank 3 is squeezed into by high-pressure pump carried out polymerisation in autoclave 4, start at from adding initator, after reaction 1.0～4.0h, beginning drips vinyl acetate continuously according to aforementioned proportion, methyl alcohol and initator, set simultaneously liquid level, open manual bottom valve 12, the liquid level that the aperture of the Weighing control control valve for small flows 13 by balance 15 is kept in course of reaction is steady, make discharging speed equal the drop rate of 1.03～1.12 times, start simultaneously ethene air intake control valve 16, the pressure of controlling by pressure sensor 9 in the aperture realization response process of ethene air intake control valve 16 is steady, react a dropping cycle and (begin to collect the EVA resin after 1.0～6.0h) to the polymerizate EVA of resin feeder 14,
4, above-mentioned polymeric reaction product EVA separation, alcoholysis, washing, drying are obtained EVOH.
The EVOH conversion ratio that is made by above-mentioned production process is more than 35%～56%, and whole process is uninterrupted, realizes long-term uninterrupted continuous polymerization reaction, and energy consumption is low, and production efficiency is high, and ratio defective product is high, effectively reduces production cost.
Claims (2)
1. EVOH production system is characterized in that: described EVOH production system is by VAM storage tank (1), methyl alcohol storage tank (2), initator storage tank (3), autoclave (4), ethene gas cylinder (5), nitrogen gas cylinder (6), manually bottom valve (12), control valve for small flows (13), resin feeder (14), balance (15) and ethene air intake control valve (16) form; Described VAM storage tank (1), methyl alcohol storage tank (2) and initator storage tank (3) directly are connected with autoclave (4) respectively; Described nitrogen gas cylinder (6) directly is connected with autoclave (4), and described ethene gas cylinder (5) is connected with described autoclave (4) by ethene air intake control valve (16); Manual bottom valve (12) and control valve for small flows (13) are arranged at the bottom of described autoclave (4) still, described control valve for small flows (13) import directly is connected with described manual bottom valve (12), described control valve for small flows (13) outlet connects resin feeder (14), and described resin feeder (14) is positioned on balance (15).
2. EVOH production system as claimed in claim 1, is characterized in that: be provided with charging aperture (7), temperature sensor (8), pressure sensor (9) and liquid level sensor (10) on described autoclave (4); Be provided with agitator (11) in described autoclave (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320180104 CN203264671U (en) | 2013-04-11 | 2013-04-11 | EVOH (Ethylene-Vinyl Alcohol Copolymer) production system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320180104 CN203264671U (en) | 2013-04-11 | 2013-04-11 | EVOH (Ethylene-Vinyl Alcohol Copolymer) production system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203264671U true CN203264671U (en) | 2013-11-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201320180104 Expired - Lifetime CN203264671U (en) | 2013-04-11 | 2013-04-11 | EVOH (Ethylene-Vinyl Alcohol Copolymer) production system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203264671U (en) |
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2013
- 2013-04-11 CN CN 201320180104 patent/CN203264671U/en not_active Expired - Lifetime
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20131106 |