CN209456347U - A kind of device reducing moisture in vinyl acetate synthesis raw material acetylene gas - Google Patents
A kind of device reducing moisture in vinyl acetate synthesis raw material acetylene gas Download PDFInfo
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- CN209456347U CN209456347U CN201822180221.8U CN201822180221U CN209456347U CN 209456347 U CN209456347 U CN 209456347U CN 201822180221 U CN201822180221 U CN 201822180221U CN 209456347 U CN209456347 U CN 209456347U
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- gas
- water
- low temperature
- acetylene gas
- vinyl acetate
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Abstract
The utility model discloses a kind of devices of moisture in reduction vinyl acetate synthesis raw material acetylene gas, it is characterized in that: setting water scrubber, adsorption tank and gas knockout tower, it washed, be adsorbed by drying by low temperature, reaction solution washs three unit processes, the moisture contained in acetylene gas after alkali cleaning removal of impurities is further removed, the water content in acetylene gas is made to be down to 0.01% or less.The device of the utility model can effectively remove the moisture during vinyl acetate production, reduce side reaction, improve the utilization rate of raw material, reduce production cost, improve product quality.
Description
Technical field
The utility model relates to a kind of device and methods of moisture in reduction vinyl acetate synthesis raw material acetylene gas.
Background technique
Vinyl acetate is one of biggish Organic Chemicals of yield in the world, is widely used in production polyvinyl acetate
(PVAc), a series ofization such as polyvinyl alcohol, coating, slurry, adhesive, polyvinyl, film, vinyl copolymer resin, acetal resin
Work and fiber product, application are related to all trades and professions.
China's vinyl acetate production starts from the 1960s.Recently as the development of polyvinyl alcohol, Chinese acetic acid
Market for Ethylene constantly expands.Vinyl acetate production process route has ethylene process and two kinds of acetylene method, and China is with carbide acetylene method
It is main.In the production process of carbide acetylene method production vinyl acetate, in acetylene generation, hypochlorite oxidation removal of impurities, alkali cleaning removal of impurities
Afterwards, still the steam containing 2% or more will increase the side reaction of synthesis if bringing into vinyl acetate synthesis reactor in acetylene gas,
Acetaldehyde, acetaldehyde polymer and crotonaldehyde etc. are generated, this not only consumes acetylene, vinyl acetate in vain, also will affect catalyst
Service life and product quality.Therefore, it is the influence for reducing Dichlorodiphenyl Acetate ethylene synthase, acetylene gas need to be further purified,
Eliminate the moisture wherein contained.
Utility model content
The purpose of this utility model is to provide the dresses that one kind can reduce moisture in vinyl acetate synthesis raw material acetylene gas
It sets, it is intended to by reducing or eliminating the moisture during vinyl acetate synthesis in raw material acetylene gas, to reduce vinyl acetate
The side reaction of synthesis reduces consumption of raw materials, improves product quality.
The utility model solves technical problem and adopts the following technical scheme that
The utility model discloses a kind of device of moisture in reduction vinyl acetate synthesis raw material acetylene gas, design features
It is: is pumped including low temperature water scrubber, heat exchange equipment, adsorption tank, gas knockout tower and water washing cycles；
The low temperature water scrubber is two-part structure, and lower section is low temperature washing section, upper section is gas-liquid separation section；The low temperature
The bottom of washing section is water lotion outlet, is equipped with acetylene gas entrance, top equipped with fresh water in the lower part of the low temperature washing section
Add mouth and recirculated water wash liquor inlet；It is exported at the top of the gas-liquid separation section equipped with acetylene gas；
The pump intake that the water lotion outlet of the low temperature washing section is pumped with water washing cycles is connected, the pump of the water washing cycles pump
Outlet is connected with pipeline before the heat exchange of the heat exchange equipment, heat exchange rear line and the low temperature washing section of the heat exchange equipment
Recirculated water wash liquor inlet is connected；Water lotion outlet is equipped on water washing cycles pump；
The acetylene gas outlet of the gas-liquid separation section is connected with the adsorption tank gas access of the adsorption tank lower part；The suction
The knockout tower gas access that the adsorption tank gas vent in attached groove top portion separates tower bottom with the gas is connected；The adsorption tank
Bottom, which is equipped with, accumulates water outlet, and the top of the gas knockout tower is equipped with knockout tower gas vent.
Further, by baffle interval between the low temperature washing section and the gas-liquid separation section, on the baffle
Equipped with through-hole for gas to pass through.
Further, the gas-liquid separation section is void tower, packed tower, hydraulic barrier or wire mesh, for removing acetylene
The water droplet carried secretly in gas.
Further, filled with the dry adsorbent of solid in the adsorption tank.The dry adsorbent of the solid is activity
Charcoal, CaCl2At least one of with silica gel.
Compared with the prior art, the beneficial effects of the utility model are embodied in:
1, the utility model reduces side reaction by effective removing of moisture in Dichlorodiphenyl Acetate ethylene production, improves
The utilization rate of raw material, reduces production cost, improves product quality；By the device of the utility model, in acetylene gas
It is aqueous to be down to 0.01% or less.
2, utility model device is simple, easy to implement.
Detailed description of the invention
Fig. 1 is the schematic device that the utility model reduces moisture in vinyl acetate synthesis raw material acetylene gas；
Figure label: 1 low temperature water scrubber；1-1 gas-liquid separation section；1-2 low temperature washing section；The outlet of 1a water lotion；1b acetylene
Gas entrance；1c fresh water adds mouth；1d recirculated water wash liquor inlet；The outlet of 1e acetylene gas；2 heat exchange equipments；3 adsorption tanks；3a absorption
Slot gas access；3b adsorption tank gas vent；3c accumulates water outlet；4 gas knockout towers；4a knockout tower gas access；4b points
From tower gas vent；5 circulating pumps；5a pump intake；5b pump discharge；5c water lotion outlet.
Specific embodiment
It elaborates with reference to the accompanying drawing to the embodiments of the present invention, the present embodiment is with the utility model technology
Implemented under premised on scheme, the detailed implementation method and specific operation process are given, but the protection of the utility model
Range is not limited to the following embodiments.
As shown in Figure 1, following device is arranged in the present embodiment first: including low temperature water scrubber 1, heat exchange equipment 2, adsorption tank 3,
Gas knockout tower 4 and water washing cycles pump 5；
Low temperature water scrubber 1 is two-part structure, and lower section is low temperature washing section 1-2, upper section is gas-liquid separation section 1-1；Low temperature
The bottom of washing section 1-2 is that water lotion exports 1a, is equipped with acetylene gas entrance 1b, top in the lower part of the low temperature washing section 1-2
Mouthful 1c and recirculated water wash liquor inlet 1d are added equipped with fresh water；Acetylene gas, which is equipped with, at the top of gas-liquid separation section 1-1 exports 1e；
The water lotion outlet 1a of low temperature washing section 1-2 is connected with the pump intake 5a of water washing cycles pump 5, water washing cycles pump 5
Pump discharge 5b is connected with pipeline before the heat exchange of heat exchange equipment 2, the heat exchange rear line of heat exchange equipment 2 and following for low temperature washing section 1-2
Ring water lotion entrance 1d is connected；Water lotion outlet 5c is equipped on water washing cycles pump 5；
The acetylene gas outlet 1e of gas-liquid separation section 1-1 is connected with the adsorption tank gas access 3a of 3 lower part of adsorption tank；Adsorption tank
The adsorption tank gas vent 3b at 3 tops is connected with the knockout tower gas access 4a of 4 bottom of gas knockout tower；The bottom of adsorption tank 3
Equipped with water outlet 3c is accumulated, the top of gas knockout tower 4 is equipped with knockout tower gas vent 4b.
In specific implementation, by baffle interval between low temperature washing section 1-2 and gas-liquid segregation section 1-1, it is equipped on baffle
Through-hole for gas to pass through.
In specific implementation, gas-liquid separation section 1-1 is void tower, packed tower, hydraulic barrier or wire mesh, for removing acetylene
The water droplet carried secretly in gas.Gas-liquid separation section is set as void tower in the present embodiment.
In specific implementation, filled with the dry adsorbent of solid in adsorption tank 3.The dry adsorbent of solid be active carbon,
CaCl2At least one of with silica gel.Active carbon is used in the present embodiment.
In specific implementation, gas knockout tower 4 is used for carrying out treated acetylene gas through adsorption tank 3 and carry out reaction solution to wash
Wash, thus gas knockout tower 4 be additionally provided with reaction solution (with one of acetic acid, vinyl acetate or combine liquid) entry and exit.
The present embodiment utilizes above-mentioned device, and the method for reducing moisture in vinyl acetate synthesis raw material acetylene gas, is by such as
Lower step carries out:
Step 1, low temperature washing
The acetylene gas to clean through alkali cleaning is sent into the low temperature washing section 1-2 of low temperature water scrubber 1 by acetylene gas entrance 1b,
With by the recirculated water washing lotion counter current contacting after the heat exchange of heat exchange equipment 2, the part steam carried secretly in acetylene gas is removed, while can remove
Remove the alkaline gas that previous process is brought into；Meanwhile mouthful 1c is added into low temperature washing section 1-2 by fresh water and supplements fresh water,
And the discharge rate of the water lotion outlet 5c of water washing cycles pump 5 is adjusted according to the bottom liquid level of low temperature washing section 1-2；
Recirculated water washing lotion and the control of the temperature of fresh water are at 1~6 DEG C；The additional amount of fresh water passes through low temperature washing section 1-2
The pH value of kettle base solution is adjusted, and makes pH value control between 7~8；
Acetylene gas, into gas-liquid separation section 1-1, is further removed and is carried secretly in acetylene gas after low temperature washing section 1-2 washing
Water droplet.
Step 2 is adsorbed by drying
, from the acetylene gas of gas-liquid separation section 1-1 outlet 1e extraction, it will be sent into and inhale through treated the acetylene gas of low temperature water scrubber 1
In attached slot 3, the moisture in acetylene gas is further adsorbed, the water accumulated in adsorption tank is discharged from water outlet 3c is accumulated.
Step 3, reaction solution washing
Acetylene gas through being adsorbed by drying is sent directly into gas knockout tower 4, through with one of acetic acid, vinyl acetate or
Liquid countercurrent contact is combined, further removes the steam contained in acetylene gas, acetylene gas send acetic acid after overhead extraction after processing
Ethylene synthase process uses.
It is aqueous in acetylene gas to be down to 0.01% or less by being greater than 2% by above-mentioned process.
The foregoing is merely the exemplary embodiments of the utility model, are not intended to limit the utility model, it is all
It is practical new to should be included in this for made any modifications, equivalent replacements, and improvements etc. within the spirit and principles of the utility model
Within the protection scope of type.
Claims (5)
1. a kind of device for reducing moisture in vinyl acetate synthesis raw material acetylene gas, it is characterised in that: including low temperature water scrubber
(1), heat exchange equipment (2), adsorption tank (3), gas knockout tower (4) and water washing cycles pump (5)；
The low temperature water scrubber (1) is two-part structure, and lower section is low temperature washing section (1-2), upper section is gas-liquid separation section (1-
1)；The bottom of the low temperature washing section (1-2) is that water lotion exports (1a), is equipped in the lower part of the low temperature washing section (1-2)
Acetylene gas entrance (1b), top are equipped with fresh water and add mouth (1c) and recirculated water wash liquor inlet (1d)；In the gas-liquid separation section
The top of (1-1) is equipped with acetylene gas outlet (1e)；
The water lotion outlet (1a) of the low temperature washing section (1-2) is connected with the pump intake (5a) of water washing cycles pump (5), the water
The pump discharge (5b) for washing circulating pump (5) is connected with pipeline before the heat exchange of the heat exchange equipment (2), and heat exchange equipment (2) are changed
Hot rear line is connected with the recirculated water wash liquor inlet (1d) of the low temperature washing section (1-2)；It is set on water washing cycles pump (5)
There is water lotion outlet (5c)；
The adsorption tank gas access of acetylene gas outlet (1e) and the adsorption tank (3) lower part of the gas-liquid separation section (1-1)
(3a) is connected；The knockout tower of adsorption tank gas vent (3b) and gas knockout tower (4) bottom at the top of the adsorption tank (3)
Gas access (4a) is connected；The bottom of the adsorption tank (3), which is equipped with, accumulates water outlet (3c), the gas knockout tower (4)
Top is equipped with knockout tower gas vent (4b).
2. the device according to claim 1 for reducing moisture in vinyl acetate synthesis raw material acetylene gas, it is characterised in that: institute
It states by baffle interval between low temperature washing section (1-2) and the gas-liquid separation section (1-1), supplied gas is equipped on the baffle
By through-hole.
3. the device according to claim 1 for reducing moisture in vinyl acetate synthesis raw material acetylene gas, it is characterised in that: institute
Stating gas-liquid separation section (1-1) is void tower, packed tower, hydraulic barrier or wire mesh, for removing the water droplet carried secretly in acetylene gas.
4. the device according to claim 1 for reducing moisture in vinyl acetate synthesis raw material acetylene gas, it is characterised in that:
Filled with the dry adsorbent of solid in the adsorption tank (3).
5. the device according to claim 4 for reducing moisture in vinyl acetate synthesis raw material acetylene gas, it is characterised in that: institute
Stating the dry adsorbent of solid is active carbon, CaCl2Or silica gel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822180221.8U CN209456347U (en) | 2018-12-25 | 2018-12-25 | A kind of device reducing moisture in vinyl acetate synthesis raw material acetylene gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201822180221.8U CN209456347U (en) | 2018-12-25 | 2018-12-25 | A kind of device reducing moisture in vinyl acetate synthesis raw material acetylene gas |
Publications (1)
| Publication Number | Publication Date |
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| CN209456347U true CN209456347U (en) | 2019-10-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201822180221.8U Active CN209456347U (en) | 2018-12-25 | 2018-12-25 | A kind of device reducing moisture in vinyl acetate synthesis raw material acetylene gas |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109400437A (en) * | 2018-12-25 | 2019-03-01 | 内蒙古蒙维科技有限公司 | A kind of device and method reducing moisture in vinyl acetate synthesis raw material acetylene gas |
-
2018
- 2018-12-25 CN CN201822180221.8U patent/CN209456347U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109400437A (en) * | 2018-12-25 | 2019-03-01 | 内蒙古蒙维科技有限公司 | A kind of device and method reducing moisture in vinyl acetate synthesis raw material acetylene gas |
| CN109400437B (en) * | 2018-12-25 | 2023-09-22 | 内蒙古蒙维科技有限公司 | Device and method for reducing water content in acetylene gas of vinyl acetate synthesis raw material |
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