CN206473984U - A kind of ethylene oxide device absorption system - Google Patents
A kind of ethylene oxide device absorption system Download PDFInfo
- Publication number
- CN206473984U CN206473984U CN201720071325.8U CN201720071325U CN206473984U CN 206473984 U CN206473984 U CN 206473984U CN 201720071325 U CN201720071325 U CN 201720071325U CN 206473984 U CN206473984 U CN 206473984U
- Authority
- CN
- China
- Prior art keywords
- rich
- stripping
- recirculated water
- ethylene oxide
- flash tank
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
- IAYPIBMASNFSPL-UHFFFAOYSA-N Ethylene oxide Chemical compound C1CO1 IAYPIBMASNFSPL-UHFFFAOYSA-N 0.000 title claims abstract description 60
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 25
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 58
- 239000007788 liquid Substances 0.000 claims abstract description 30
- 239000000243 solution Substances 0.000 claims description 14
- 239000007864 aqueous solution Substances 0.000 claims description 11
- 230000000694 effects Effects 0.000 claims description 4
- 238000010438 heat treatment Methods 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 3
- 238000000746 purification Methods 0.000 claims description 2
- 239000004593 Epoxy Substances 0.000 claims 2
- 150000001335 aliphatic alkanes Chemical class 0.000 claims 2
- 238000005187 foaming Methods 0.000 abstract description 4
- 239000002699 waste material Substances 0.000 abstract description 3
- JECYNCQXXKQDJN-UHFFFAOYSA-N 2-(2-methylhexan-2-yloxymethyl)oxirane Chemical compound CCCCC(C)(C)OCC1CO1 JECYNCQXXKQDJN-UHFFFAOYSA-N 0.000 abstract description 2
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 230000008859 change Effects 0.000 abstract description 2
- 230000006837 decompression Effects 0.000 abstract description 2
- 239000000047 product Substances 0.000 description 5
- OTMSDBZUPAUEDD-UHFFFAOYSA-N Ethane Chemical compound CC OTMSDBZUPAUEDD-UHFFFAOYSA-N 0.000 description 3
- LYCAIKOWRPUZTN-UHFFFAOYSA-N Ethylene glycol Chemical compound OCCO LYCAIKOWRPUZTN-UHFFFAOYSA-N 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 3
- 238000007670 refining Methods 0.000 description 3
- 239000006227 byproduct Substances 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000000686 essence Substances 0.000 description 2
- 239000000945 filler Substances 0.000 description 2
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 1
- 239000005977 Ethylene Substances 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 125000002485 formyl group Chemical class [H]C(*)=O 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 125000000466 oxiranyl group Chemical group 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Landscapes
- Epoxy Compounds (AREA)
Abstract
The utility model discloses a kind of ethylene oxide device absorption system, it includes rich recirculated water flash tank and reabsorber, rich recirculated water flash tank bottom connects poor rich liquid heat exchanger bottom liquid inlet mouthful by rich water circulating pump, inlet in the middle part of liquid outlet connection stripping rectifying column at the top of poor rich liquid heat exchanger, it is rectifying section to strip rectifying column epimere, bottom is stripping section, and poor rich liquid heat exchanger is provided with poor circulation water entrance.The utility model replaces former absorption tower by using horizontal rich recirculated water flash tank and reabsorber, so that rich recirculated water is entered in rich recirculated water flash tank by decompression bigger Free up Memory, the pressure-difference fluctuation of tower is small, reduce the possibility of foaming, so as to the stable operation beneficial to tower, and the change of Free up Memory allows fixed gas quickly to be sufficiently separated out greatly, it will not accumulate in systems, be conducive to the absorption of oxirane, product quality, yield and the stability of a system and security are improved, energy resource consumption and the waste of resource is reduced.
Description
Technical field
The utility model belongs to technical field of chemical, and in particular to a kind of stability of a system is good, safe, the energy
The low ethylene oxide device absorption system of consumption.
Background technology
At present, in ethylene oxide device absorption system, aqueous solution of ethylene oxide is delivered to ethylene, passes through
The middle pressure steam indirectly heat of bottom of towe heater, makes oxirane be stripped out from the aqueous solution, then pass through overhead condenser
Gas phase oxirane is condensed into liquid, oxirane reabsorber bottom is entered by the mode of flowing automatically, from reabsorber top
Add one and absorb water, the oxirane of bottom of towe is absorbed, the oxirane of bottom gas gasification, by quilt during the filler of upper strata
Fully absorb, the ethylene oxide solution of reabsorber bottom is delivered to refining system by column bottoms pump again and carries out oxirane essence
System, finally goes out qualified products；But it is due to that reabsorber diameter is smaller, filler is added in order to increase Gas-liquid interfacial area,
Pressure difference can be produced during ethylene oxide absorption, and pressure oscillation is larger, easily produces foaming, is not sufficiently stable production,
At the same time, fixed gas is also not easy to be come out, could not removal system completely, longtime running can make in product to increase containing aldehyde
Height, influences product quality.
Utility model content
For the above-mentioned problems in the prior art, the purpose of this utility model is to provide a kind of stability of a system
The low ethylene oxide device absorption system of good, safe, energy resource consumption.
A kind of described ethylene oxide device absorption system, it is characterised in that rich recirculated water flash tank including connection and
Reabsorber, the rich recirculated water flash tank bottom connects poor rich liquid heat exchanger bottom liquid inlet mouthful by rich water circulating pump, rich or poor
Inlet in the middle part of liquid outlet connection stripping rectifying column at the top of liquid heat exchanger, the stripping rectifying column epimere is rectifying section, and bottom is
Stripping section, poor rich liquid heat exchanger is provided with poor circulation water entrance, and poor recirculated water exchanges heat with aqueous solution of ethylene oxide in poor rich solution
Device carries out heat exchange, and the oxirane in ethylene oxide solution after heat exchange enters rectifying section rectifying after being stripped through stripping section,
Oxirane refining system is connected at the top of rectifying section again.
Described a kind of ethylene oxide device absorption system, it is characterised in that rich recirculated water flash tank is horizontal to be set, then
Absorption tower is vertically set on top in the middle part of rich recirculated water flash tank, and rich recirculated water flash tank is identical with reabsorber diameter, ring
The oxidative ethane aqueous solution enters rich recirculated water flash tank from rich recirculated water flash tank upper left side and flashed, fixed gas and other light group
Point enter after the residual ethylene oxide in reabsorber, fixed gas and other light components absorbs through reabsorber, return to rich circulation
Water flash tank, is pumped out by rich water circulating pump, and fixed gas and other light components are discharged by gas outlet at the top of reabsorber.
Described a kind of ethylene oxide device absorption system, it is characterised in that stripping section is provided with stripping rectifying heating
Device, oxirane forms interior circulation between stripping section and stripping rectifying heater, and stripping rectifying heater top is provided with steam
Import, bottom is exported provided with steam condensate, and steam enters stripping rectifying heater and heat exchange, cooling are carried out to ethylene oxide solution
After become condensing gas and export from steam condensate to discharge, ethylene oxide solution after heating returns to stripping section and stripped, raising vapour
Put forward effect.
Described a kind of ethylene oxide device absorption system, it is characterised in that reabsorber is packed tower.
A kind of above-mentioned ethylene oxide device absorption system, including rich recirculated water flash tank and reabsorber, richness circulation
Water flash tank bottom connects liquid outlet at the top of poor rich liquid heat exchanger bottom liquid inlet mouthful, poor rich liquid heat exchanger by rich water circulating pump and connected
Inlet in the middle part of stripping rectifying column is connect, stripping rectifying column epimere is rectifying section, and bottom is stripping section, and poor rich liquid heat exchanger is provided with
Poor circulation water entrance.The utility model replaces former absorption tower by using horizontal rich recirculated water flash tank and reabsorber, makes
By improving reabsorber, the rich recirculated water by decompression is entered bigger Free up Memory in flash tank, the pressure-difference fluctuation of tower
It is small, the possibility of foaming is reduced, so that beneficial to the stable operation of tower, and the change of Free up Memory allows fixed gas quickly to fill greatly
Separate, will not accumulate in systems, be conducive to the absorption of oxirane, improve product quality and yield, further carry
The high stability of a system and security, reduce the yield of byproduct, reduce energy resource consumption and the waste of resource, meet country
To the related request of environmental protection.
Brief description of the drawings
Fig. 1 is the utility model structural representation.
In figure：1- richness recirculated water flash tanks, 2- reabsorbers, 3- richness water circulating pumps, 4- poor rich liquid heat exchangers, 5- stripping essences
Evaporate tower, 501- rectifying sections, 502- stripping sections, 6- stripping rectifying heaters.
Embodiment
Below in conjunction with Figure of description, the utility model will be further described, but protection domain of the present utility model is simultaneously
It is not limited only to this：
As shown in figure 1, a kind of ethylene oxide device absorption system of the present utility model, including rich recirculated water flash tank 1
With reabsorber 2, rich recirculated water flash tank 1 is horizontal to be set, and reabsorber 2 is vertically vertical to be arranged in rich recirculated water flash tank 1
Portion top is simultaneously connected thereto, and rich recirculated water flash tank 1 is identical with the diameter of reabsorber 2, and reabsorber 2 of the present utility model is to fill out
Expect tower, the rich bottom of recirculated water flash tank 1 connects the bottom liquid inlet mouthful of poor rich liquid heat exchanger 4, poor rich solution by rich water circulating pump 3
The top liquid outlet connection stripping middle part inlet of rectifying column 5 of heat exchanger 4, the epimere of stripping rectifying column 5 is rectifying section 501, under
Portion is stripping section 502, and poor rich liquid heat exchanger 4 is provided with poor circulation water entrance, and poor recirculated water is with aqueous solution of ethylene oxide poor
Rich solution heat exchanger 4 carries out heat exchange, and the oxirane in ethylene oxide solution after heat exchange enters after being stripped through stripping section 502
The rectifying of rectifying section 501, then connect oxirane refining system from the top of rectifying section 501.
In order to improve Srteam Stripping effect, the utility model is on stripping section 502 provided with stripping rectifying heater 6, oxirane
Interior circulation is formed between stripping section 502 and stripping rectifying heater 6, the top of stripping rectifying heater 6 is provided with steam inlet, under
Portion is exported provided with steam condensate, and steam enters stripping rectifying heater 6 and carries out heat exchange to ethylene oxide solution, becomes after cooling
Condensing gas is exported from steam condensate and discharged, and the ethylene oxide solution after heating returns to stripping section 502 and stripped, and improves stripping effect
Really.
As illustrated, the course of work of the present utility model is as follows：Aqueous solution of ethylene oxide（The abbreviation EO aqueous solution）Followed from richness
The upper left side of ring water flash tank 1 enters rich recirculated water flash tank 1 and flashed, and fixed gas and other light components enter reabsorber 2,
After residual ethylene oxide in fixed gas and other light components absorbs through reabsorber 2, rich recirculated water flash tank 1 is returned to, by richness
Water circulating pump 3 is pumped out, and fixed gas and other light components are discharged by the top gas outlet of reabsorber 2, after rich water circulating pump 3 will be flashed
The poor recirculated water that is delivered in poor rich liquid heat exchanger 4 and poor rich liquid heat exchanger 4 of aqueous solution of ethylene oxide carry out heat exchange, heat exchange
Ethylene oxide solution afterwards enters back into stripping rectifying column 5, and oxirane first is stripped out in stripping section 502, unstripped ring
Oxidative ethane forms interior circulation between stripping section 502 and stripping rectifying heater 6, is heated by the steam of stripping rectifying heater 6
After enter back into the further stripping of stripping section 502, the oxirane after stripping enters rectifying section 501 after rectifying from rectifying section 501
Ejection is expelled to purification ethylene oxide system, carries out next step process.
The utility model makes oxirane have in rich recirculated water flash tank sufficiently by using rich recirculated water flash tank
Fixed gas in space, rich circulating water pressure abrupt release, aqueous solution of ethylene oxide can be flashed off sufficiently, fixed gas band
Some gas phase oxirane enters reabsorber, and gas phase oxirane is fully absorbed in reabsorber, and fixed gas
By tower top removal system, it will not accumulate in systems, so that product quality is also improved, while also reducing ethylene glycol
Produce；Because rich recirculated water flash tank there are enough spaces, larger pressure difference will not be produced, system foaming is solved well
Certainly, operation is also stablized relatively, and the utility model is not changing ethylene oxide production master by the improvement of ethylene oxide absorption system
In the case of wanting flow, installation optimization is realized, the yield of byproduct is reduced, energy resource consumption and the waste of resource is reduced, meets state
Family is to the related request of environmental protection, and the absorption system used at present relatively, its ethylene oxide production can improve 2400 tons/year, by ring
Oxidative ethane 8000 yuan of calculating per ton, can produce about 19,200,000 yuan of economic benefit year.
Claims (4)
1. a kind of ethylene oxide device absorption system, it is characterised in that the rich recirculated water flash tank including connection（1）Inhale again
Receive tower（2）, the rich recirculated water flash tank（1）Bottom passes through rich water circulating pump（3）Connect poor rich liquid heat exchanger（4）Bottom liquid inlet
Mouthful, poor rich liquid heat exchanger（4）Top liquid outlet connection stripping rectifying column（5）Middle part inlet, the stripping rectifying column（5）Epimere
For rectifying section（501）, bottom is stripping section（502）, poor rich liquid heat exchanger（4）It is provided with poor circulation water entrance, poor recirculated water
With aqueous solution of ethylene oxide in poor rich liquid heat exchanger（4）Carry out the epoxy second in heat exchange, the ethylene oxide solution after heat exchange
Alkane is through stripping section（502）Enter rectifying section after stripping（501）Rectifying, then from rectifying section（501）Top connects purification ethylene oxide
System.
2. a kind of ethylene oxide device absorption system according to claim 1, it is characterised in that rich recirculated water flash tank
（1）It is horizontal to set, reabsorber（2）It is vertically set on rich recirculated water flash tank（1）Above middle part, and rich recirculated water flash tank
（1）With reabsorber（2）Diameter is identical, and aqueous solution of ethylene oxide is from rich recirculated water flash tank（1）Upper left side enters rich recirculated water
Flash tank（1）Flashed, fixed gas and other light components enter reabsorber（2）, it is residual in fixed gas and other light components
Oxirane is stayed through reabsorber（2）After absorption, rich recirculated water flash tank is returned（1）, by rich water circulating pump（3）Pump out, do not coagulate
Gas and other light components are by reabsorber（2）Discharge top gas outlet.
3. a kind of ethylene oxide device absorption system according to claim 1, it is characterised in that stripping section（502）On set
There is stripping rectifying heater（6）, oxirane is in stripping section（502）With stripping rectifying heater（6）Between form interior circulation, vapour
Carry rectifying heater（6）Top is provided with steam inlet, and bottom is exported provided with steam condensate, and steam enters stripping rectifying heater
（6）Heat exchange is carried out to ethylene oxide solution, becomes condensing gas after cooling and exports discharge, the epoxy second after heating from steam condensate
Alkane solution returns to stripping section（502）Stripped, improve Srteam Stripping effect.
4. a kind of ethylene oxide device absorption system according to claim 1, it is characterised in that reabsorber（2）To fill out
Expect tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720071325.8U CN206473984U (en) | 2017-01-20 | 2017-01-20 | A kind of ethylene oxide device absorption system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720071325.8U CN206473984U (en) | 2017-01-20 | 2017-01-20 | A kind of ethylene oxide device absorption system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206473984U true CN206473984U (en) | 2017-09-08 |
Family
ID=59753639
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720071325.8U Expired - Fee Related CN206473984U (en) | 2017-01-20 | 2017-01-20 | A kind of ethylene oxide device absorption system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206473984U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110041298A (en) * | 2019-05-23 | 2019-07-23 | 中国科学院过程工程研究所 | A kind of method and device of micro epoxyalkane removing conversion |
-
2017
- 2017-01-20 CN CN201720071325.8U patent/CN206473984U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110041298A (en) * | 2019-05-23 | 2019-07-23 | 中国科学院过程工程研究所 | A kind of method and device of micro epoxyalkane removing conversion |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170908 |