CN206418054U - Avoid emptying formula rectifying column tail gas recycle reutilization system - Google Patents
Avoid emptying formula rectifying column tail gas recycle reutilization system Download PDFInfo
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- CN206418054U CN206418054U CN201621451431.0U CN201621451431U CN206418054U CN 206418054 U CN206418054 U CN 206418054U CN 201621451431 U CN201621451431 U CN 201621451431U CN 206418054 U CN206418054 U CN 206418054U
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Abstract
One kind avoids emptying formula rectifying column tail gas recycle reutilization system, including extraction tower, acetaldehyde water storage tank, Ethanal distillation column, condenser, acetaldehyde distillates groove, water scrubber, the top gaseous phase outlet of extraction tower is connected with the tower reactor gas phase entrance of water scrubber, the top gaseous phase outlet of Ethanal distillation column is connected with the gas phase entrance of the first condenser, the gaseous phase outlet of first condenser is used to discharge aldehydes gas, the top gaseous phase outlet of the tower reactor gas phase entrance connection extraction tower of the water scrubber, the gaseous phase outlet of first condenser and the tower reactor gas phase entrance of water scrubber are connected, in the utility model, by extraction tower by acetaldehyde water and vinyl acetate initial gross separation, the aldehydes gas and the aldehydes gas of extraction column overhead not being condensed are washed with water tower absorption, further send extraction tower separation back to, so gas phase acetaldehyde absorbs in system interior circulation, in the absence of the phenomenon being vented, also avoid because of emptying and caused by the wasting of resources and environmental pollution.
Description
Technical field
The utility model is related to PVA production technical fields, more particularly to one kind avoids emptying formula rectifying column tail gas recycle again
Utilize system.
Background technology
During PVA is produced, by the exquisite acetaldehyde of distillation system, while part vinyl acetate and acetaldehyde can be produced
Mixture, the Main Ingredients and Appearance of mixture is vinyl acetate, acetaldehyde water, it is necessary to by acetaldehyde and vinyl acetate separating-purifying, to reach
The purpose stored respectively.
The content of the invention
It is necessary to propose a kind of to avoid emptying formula rectifying column tail gas recycle sharp again acetaldehyde and vinyl acetate separating-purifying
Use system.
One kind avoids emptying formula rectifying column tail gas recycle reutilization system, including extraction tower, acetaldehyde water storage tank, acetaldehyde rectifying
Tower, the first condenser, acetaldehyde distillate groove, water scrubber, and feeding vinyl acetate and acetaldehyde are provided in the bottom of towe of the extraction tower
The feed(raw material)inlet of the mixture of water, acetaldehyde water inlet, top gaseous phase outlet and the washing of extraction tower are set on the top of extraction tower
The tower reactor gas phase entrance connection of tower, for the aldehydes gas in extraction tower to be sent into water scrubber, the upper aqueous phase of extraction tower goes out
Mouth is used to discharge vinyl acetate liquid, and the tower reactor liquid-phase outlet of extraction tower is connected with acetaldehyde water storage tank, acetaldehyde water liquid is sent
Enter acetaldehyde water storage tank, feeding mouth connects in the tower that the liquid outlet of the bottom land of the acetaldehyde water storage tank passes through circulating pump and Ethanal distillation column
Connect, acetaldehyde water is sent into Ethanal distillation column, the tower reactor entrance of the Ethanal distillation column is used to be passed through primary steam, acetaldehyde rectifying
Material outlet is used to send out a small amount of gas phase vinyl acetate and acetaldehyde in the tower of tower, the top gaseous phase outlet of Ethanal distillation column and the
The gas phase entrance connection of one condenser, the tower reactor liquid-phase outlet of Ethanal distillation column is used to discharge waste water, the liquid phase of the first condenser
Export the entrance for distillating groove with acetaldehyde to be connected, the gaseous phase outlet of the first condenser is used to discharge aldehydes gas, and acetaldehyde distillates groove and led to
Circulating pump is crossed to distillate the smart acetaldehyde in part, or acetaldehyde evaporates the tower that the smart acetaldehyde in part is sent back to Ethanal distillation column out of the groove and through circulating pump
Top liquid phase entrance is flowed back, the top gaseous phase outlet of the tower reactor gas phase entrance connection extraction tower of the water scrubber, water scrubber
Tower top liquid phase entrance is used to be passed through water, and the tower reactor liquid-phase outlet of water scrubber and the acetaldehyde water inlet of extraction tower are connected, by acetaldehyde
In water feeding extraction tower, the gaseous phase outlet of first condenser and the tower reactor gas phase entrance of water scrubber are connected, cold by first
In aldehydes gas feeding water scrubber in condenser.
It is preferred that, chuck layer also is set in the outer wall of the extraction tower, it is pre- between the chuck layer and the outer wall of extraction tower
Back cavity is stayed, freezing liquid water return outlet is opened up on the top of chuck layer, freezing liquid filling pipe end is opened up in the bottom of chuck layer, to pass through
Freezing liquid is passed through to cool to extraction tower.
It is preferred that, the extraction tower is packed tower, and packing area, the top of the packing area are set in the inside of the packed tower
The height in portion is less than the acetaldehyde water inlet, and the height of the bottom of packing area is higher than the material inlet of extraction tower.
It is preferred that, the water scrubber is plate distillation column.
It is preferred that, the emptying formula rectifying column tail gas recycle reutilization system also includes the second condenser, the second condenser
Entrance and Ethanal distillation column tower in material outlet connect, by a small amount of vinyl acetate and second discharged in Ethanal distillation column tower
Aldehyde Mixed Gas Condensation, the outlet of the second condenser is connected by the material inlet of circulating pump and extraction tower, will be condensed
Vinyl acetate and acetaldehyde liquid feeding extraction tower extract and separate, and then acetaldehyde is fed again into the purification of system interior circulation again, will
Vinyl acetate is separated and collected.
In the utility model, by extraction tower by acetaldehyde water and vinyl acetate initial gross separation, vinyl acetate is collected and stored up
Deposit, while the tower top of extraction tower can discharge aldehydes gas, these acetaldehyde being discharged other be washed with water tower and absorb and be transformed into acetaldehyde
Water, separates acetaldehyde rectifying by Ethanal distillation column, and isolated gas phase acetaldehyde is condensed into receipts by the first condenser
The aldehydes gas of collection, the aldehydes gas not being condensed and extraction column overhead is washed with water tower absorption, further sends extraction tower point back to
Absorbed from, such gas phase acetaldehyde in system interior circulation, in the absence of the phenomenon being vented, also avoid because emptying and caused by money
Source is wasted and environmental pollution.
Brief description of the drawings
Fig. 1 avoids the structural representation of emptying formula rectifying column tail gas recycle reutilization system for described in.
In figure：Extraction tower 10, feed(raw material)inlet 11, acetaldehyde water inlet 12, the top gaseous phase of extraction tower export 13, extraction tower
Upper aqueous phase outlet 14, the tower reactor liquid-phase outlet 15 of extraction tower, chuck layer 16, freezing liquid water return outlet 161, freezing liquid filling pipe end
162nd, feeding mouth 31 in packing area 17, acetaldehyde water storage tank 20, Ethanal distillation column 30, the tower of Ethanal distillation column, Ethanal distillation column
Material outlet 33, the top gaseous phase of Ethanal distillation column export 34, Ethanal distillation column in tower reactor entrance 32, the tower of Ethanal distillation column
Tower reactor liquid-phase outlet 35, the first condenser 40, the liquid-phase outlet 41 of the first condenser, the gaseous phase outlet 42 of the first condenser, second
Aldehyde distillates groove 50, water scrubber 60, the tower reactor gas phase entrance 61 of water scrubber, tower top liquid phase entrance 62, the tower of water scrubber of water scrubber
Kettle liquid-phase outlet 63, the second condenser 70.
Embodiment
In order to illustrate more clearly of the technical scheme of the utility model embodiment, it will use below required in embodiment
Accompanying drawing be briefly described, it should be apparent that, drawings in the following description are some embodiments of the present utility model, for this
For the those of ordinary skill of field, on the premise of not paying creative work, it can also obtain other according to these accompanying drawings
Accompanying drawing.
Referring to Fig. 1, the utility model embodiment avoids emptying formula rectifying column tail gas recycle reutilization system there is provided one kind,
Groove 50, water scrubber 60 are distillated including extraction tower 10, acetaldehyde water storage tank 20, Ethanal distillation column 30, the first condenser 40, acetaldehyde.
It is provided for sending into the feed(raw material)inlet 11 of the mixture of vinyl acetate and acetaldehyde water in the bottom of towe of extraction tower 10, in extraction
Take the top of tower 10 that acetaldehyde water inlet 12 is set, have acetaldehyde water and vinyl acetate mixture due to what is sent into feed(raw material)inlet 11,
And the simply acetaldehyde water sent into acetaldehyde water inlet 12, in order to increase the area of two kinds of materials contact, by forming convection current to promote
Enter extract and separate, so the height of acetaldehyde water inlet 12 to be set above to the height of feed(raw material)inlet 11, so when extraction tower 10
, can be from tower reactor liquid-phase outlet discharge part acetaldehyde water layered, positioned at bottom, to keep when interior liquid level is higher
Liquid level in tower meets technological requirement, and the top gaseous phase outlet 13 of extraction tower is connected with the tower reactor gas phase entrance 61 of water scrubber, used
Sent into by the aldehydes gas in extraction tower 10 in water scrubber 60, the upper aqueous phase outlet 14 of extraction tower is used to discharge vinyl acetate
Liquid, the tower reactor liquid-phase outlet 15 of extraction tower is connected with acetaldehyde water storage tank 20, and acetaldehyde water liquid is sent into acetaldehyde water storage tank 20,
Feeding mouth 31 is connected in the tower that the liquid outlet of the bottom land of acetaldehyde water storage tank 20 passes through circulating pump and Ethanal distillation column, by acetaldehyde water
Send into Ethanal distillation column 30.
The tower reactor entrance 32 of Ethanal distillation column is used for for being passed through material outlet 33 in primary steam, the tower of Ethanal distillation column
A small amount of gas phase vinyl acetate and acetaldehyde is sent out, the top gaseous phase outlet 34 of Ethanal distillation column and the gas phase of the first condenser 40 enter
Mouth connection, the tower reactor liquid-phase outlet 35 of Ethanal distillation column is used to discharge waste water, and liquid-phase outlet 41 and the acetaldehyde of the first condenser evaporate
Go out the entrance connection of groove 50, the gaseous phase outlet 42 of the first condenser is used to discharge aldehydes gas, and acetaldehyde distillates groove 50 and passes through circulation
Pump distillates the smart acetaldehyde in part, or acetaldehyde distillates the tower top that groove 50 sends the smart acetaldehyde in part back to by circulating pump Ethanal distillation column 30
Liquid phase entrance is flowed back.
The top gaseous phase outlet 13 of the connection extraction tower of tower reactor gas phase entrance 61 of water scrubber, the tower top liquid phase entrance of water scrubber
62 are used to be passed through water, and the tower reactor liquid-phase outlet 63 of water scrubber is connected with the acetaldehyde water inlet 12 of extraction tower 10, acetaldehyde water is sent
Enter in extraction tower 10, the gaseous phase outlet 42 of the first condenser is connected with the tower reactor gas phase entrance 61 of water scrubber, by the first condensation
In aldehydes gas feeding water scrubber 60 in device 40.
Further, chuck layer 16 also is set in the outer wall of extraction tower 10, it is pre- between chuck layer 16 and the outer wall of extraction tower 10
Back cavity is stayed, freezing liquid water return outlet 161 is opened up on the top of chuck layer 16, freezing liquid filling pipe end is opened up in the bottom of chuck layer 16
162, to be cooled by being passed through freezing liquid to extraction tower 10.
Because the raw material entered from feeding mouth retains residual temperature, and the boiling point of acetaldehyde is relatively low, in order to ensure acetaldehyde in water
In fully dissolving it is non-volatile, so there is provided chuck layer 16, by being passed through freezing liquid, by the temperature control in the tower of extraction tower 10
System it is relatively low, for example control at 5-8 DEG C, to ensure to ensure that the extract and separate effect of acetaldehyde and vinyl acetate is good.
Also, freezing liquid filling pipe end 162 is arranged on to the bottom of chuck layer 16, freezing liquid water return outlet 161 is arranged on chuck
The top of layer 16 so that freezing liquid during rising by be all surrounded around extraction tower 10, and then ensure to extraction tower
10 uniform decrease in temperature.
Further, extraction tower 10 is packed tower, sets filling in packing area 17, packing area to have hole in the inside of packed tower
The material of porosity, for increasing surface area, the height at the top of packing area 17 is less than acetaldehyde water inlet 12, the bottom of packing area 17
Height be less than extraction tower 10 material inlet 11.Packing area 17 can be such that gas, liquid passes through, and enter extraction tower in material
After in 10, the speed flowed by the buffering liquid of packing area 17 increases the contact area of two kinds of liquid so that two kinds of liquid are abundant
Separation, reaches the purpose of layering.
Further, water scrubber 60 is plate distillation column.
Further, due in the tower of Ethanal distillation column material outlet 33 still have a small amount of aldehydes gas of discharge, be
This portion gas is collected again, in another embodiment, this is avoided emptying formula rectifying column tail gas recycle reutilization system
Material outlet 33 in the second condenser 70, the entrance of the second condenser 70 and the tower of Ethanal distillation column is also provided with to connect, will
The a small amount of vinyl acetate and acetaldehyde Mixed Gas Condensation discharged in Ethanal distillation column tower, the outlet of the second condenser 70 pass through circulation
The material inlet 11 of pump and extraction tower is connected, and condensed vinyl acetate and acetaldehyde liquid feeding extraction tower are extracted point again
From, and then acetaldehyde is fed again into the purification of system interior circulation, vinyl acetate is separated and collected.
Module or unit in the utility model embodiment device can according to actual needs be merged, divide and deleted
Subtract.
Above disclosed is only the utility model preferred embodiment, can not limit the utility model with this certainly
Interest field, one of ordinary skill in the art will appreciate that realize all or part of flow of above-described embodiment, and according to this reality
The equivalent variations made with new claim, still fall within the scope that utility model is covered.
Claims (5)
1. one kind avoids emptying formula rectifying column tail gas recycle reutilization system, it is characterised in that：Extraction tower, acetaldehyde water storage tank, second
Aldehyde rectifying column, the first condenser, acetaldehyde distillate groove, water scrubber, are provided for sending into vinyl acetate in the bottom of towe of the extraction tower
With the feed(raw material)inlet of the mixture of acetaldehyde water, acetaldehyde water inlet, the top gaseous phase outlet of extraction tower are set on the top of extraction tower
It is connected with the tower reactor gas phase entrance of water scrubber, for the aldehydes gas in extraction tower to be sent into water scrubber, the top of extraction tower
Liquid-phase outlet is used to discharge vinyl acetate liquid, and the tower reactor liquid-phase outlet of extraction tower is connected with acetaldehyde water storage tank, by acetaldehyde water
Liquid sends into acetaldehyde water storage tank, and the liquid outlet of the bottom land of the acetaldehyde water storage tank enters in the tower by circulating pump and Ethanal distillation column
Material mouth is connected, and acetaldehyde water is sent into Ethanal distillation column, and the tower reactor entrance of the Ethanal distillation column is used to be passed through primary steam, second
Material outlet is used to send out a small amount of gas phase vinyl acetate and acetaldehyde in the tower of aldehyde rectifying column, and the top gaseous phase of Ethanal distillation column goes out
Mouth is connected with the gas phase entrance of the first condenser, and the tower reactor liquid-phase outlet of Ethanal distillation column is used to discharge waste water, the first condenser
Liquid-phase outlet be connected with the entrance that acetaldehyde distillates groove, the gaseous phase outlet of the first condenser is used to discharge aldehydes gas, and acetaldehyde evaporates
The smart acetaldehyde in part is distillated out of the groove and through circulating pump, or acetaldehyde evaporates out of the groove and through circulating pump and to send the smart acetaldehyde in part back to acetaldehyde rectifying
The tower top liquid phase entrance of tower is flowed back, the top gaseous phase outlet of the tower reactor gas phase entrance connection extraction tower of the water scrubber, water
Washing the tower top liquid phase entrance of tower is used to be passed through water, and the tower reactor liquid-phase outlet of water scrubber and the acetaldehyde water inlet of extraction tower are connected, with
Acetaldehyde water is sent into extraction tower, the gaseous phase outlet of first condenser and the tower reactor gas phase entrance of water scrubber are connected, will
In aldehydes gas feeding water scrubber in first condenser.
2. avoid emptying formula rectifying column tail gas recycle reutilization system as claimed in claim 1, it is characterised in that：Also described
The outer wall of extraction tower sets chuck layer, back cavity is reserved between the chuck layer and the outer wall of extraction tower, on the top of chuck layer
Freezing liquid water return outlet is opened up, freezing liquid filling pipe end is opened up in the bottom of chuck layer, to be carried out by being passed through freezing liquid to extraction tower
Cooling.
3. avoid emptying formula rectifying column tail gas recycle reutilization system as claimed in claim 2, it is characterised in that：The extraction
Tower is packed tower, and packing area is set in the inside of the packed tower, and the height at the top of the packing area is less than the acetaldehyde water
Entrance, the height of the bottom of packing area is higher than the material inlet of extraction tower.
4. avoid emptying formula rectifying column tail gas recycle reutilization system as claimed in claim 2, it is characterised in that：The washing
Tower is plate distillation column.
5. avoid emptying formula rectifying column tail gas recycle reutilization system as claimed in claim 2, it is characterised in that：The emptying
Formula rectifying column tail gas recycle reutilization system also includes in the second condenser, the entrance of the second condenser and the tower of Ethanal distillation column
Material outlet is connected, by a small amount of vinyl acetate discharged in Ethanal distillation column tower and acetaldehyde Mixed Gas Condensation, the second condensation
The outlet of device is connected by the material inlet of circulating pump and extraction tower, and condensed vinyl acetate and acetaldehyde liquid feeding are extracted
Tower extract and separate again is taken, and then acetaldehyde is fed again into the purification of system interior circulation, vinyl acetate is separated and collected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621451431.0U CN206418054U (en) | 2016-12-28 | 2016-12-28 | Avoid emptying formula rectifying column tail gas recycle reutilization system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621451431.0U CN206418054U (en) | 2016-12-28 | 2016-12-28 | Avoid emptying formula rectifying column tail gas recycle reutilization system |
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| CN206418054U true CN206418054U (en) | 2017-08-18 |
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| CN201621451431.0U Active CN206418054U (en) | 2016-12-28 | 2016-12-28 | Avoid emptying formula rectifying column tail gas recycle reutilization system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109646982A (en) * | 2018-12-03 | 2019-04-19 | 安徽华塑股份有限公司 | Rectification tail gas recovery method |
| CN113861026A (en) * | 2021-10-29 | 2021-12-31 | 天津大学 | Refining method of vinyl acetate and acetic acid synthesized by acetylene method |
| CN114195628A (en) * | 2021-12-31 | 2022-03-18 | 内蒙古双欣环保材料股份有限公司 | Acetaldehyde purification device and process thereof |
-
2016
- 2016-12-28 CN CN201621451431.0U patent/CN206418054U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109646982A (en) * | 2018-12-03 | 2019-04-19 | 安徽华塑股份有限公司 | Rectification tail gas recovery method |
| CN113861026A (en) * | 2021-10-29 | 2021-12-31 | 天津大学 | Refining method of vinyl acetate and acetic acid synthesized by acetylene method |
| CN114195628A (en) * | 2021-12-31 | 2022-03-18 | 内蒙古双欣环保材料股份有限公司 | Acetaldehyde purification device and process thereof |
| CN114195628B (en) * | 2021-12-31 | 2023-11-17 | 内蒙古双欣环保材料股份有限公司 | Acetaldehyde purifying device and technology thereof |
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