CN205216248U - Ethyl methyl ketone drying tower - Google Patents
Ethyl methyl ketone drying tower Download PDFInfo
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- CN205216248U CN205216248U CN201521097303.6U CN201521097303U CN205216248U CN 205216248 U CN205216248 U CN 205216248U CN 201521097303 U CN201521097303 U CN 201521097303U CN 205216248 U CN205216248 U CN 205216248U
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- tower
- mek
- drying tower
- ethyl methyl
- methyl ketone
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Abstract
The utility model provides an ethyl methyl ketone drying tower, including the bottom reboiler, overhead condenser and top reflux jar, wherein, ethyl methyl ketone drying tower's middle part feed inlet is connected with the first material feed pipeline who is used for the supply to come from the thick ethyl methyl ketone of the synthetic workshop section of ethyl methyl ketone, top reflux jar drain connection has the drain pipe, top reflux jar oil phase discharge port is connected with top of the tower reflux pipeline, the discharge gate is connected with ejection of compact pipeline at the bottom of the tower at the bottom of the tower, a serial communication port, top reflux jar oil phase discharge port or top of the tower reflux pipeline still divide expenditure second material feed pipeline to be connected to the following position of backward flow mouth that top of the tower reflux pipeline connects. The utility model discloses reduced ethyl methyl ketone drying tower's reflux ratio, the effectual load that reduces ethyl methyl ketone drying tower has reduced the energy consumption, simultaneously, has reduced the quantity of hexane, has practiced thrift the cost, ethyl methyl ketone drying tower after reforming transform, and it is easier to operate.
Description
Technical field
The utility model relates to a kind of MEK drying tower.
Background technology
In existing MEK preparation technology, comprise a MEK drying tower, the effect of this tower is the moisture removal will contained in the material of MEK synthesizing section, concrete technological process is that the thick MEK come by MEK synthesizing section sends into MEK drying tower, this tower uses hexane to make entrainer, utilize hexane and water azeotropic, water in thick MEK fraction is separated from tower top together with light component, drying tower backflash is entered after condensation, organic phase and aqueous phase layering in groove, organic phase as phegma to drying tower, incoagulable gas reclaims after hexane through condensation and is sent to torch, aqueous phase send sump.MEK out at the bottom of drying tower tower and unreacted sec-butyl alcohol send into MEK tower, and tower top steams product MEK, and after condensation, the MEK product obtaining purity >=99.5% send finished product storage tank.Unreacted sec-butyl alcohol out at the bottom of tower, sends sec-butyl alcohol refinement back to and recycles.In this technique, need to use hexane to make entrainment reagent, the water in thick MEK fraction is distillated from tower top together with light component.In prior art, hexane, mainly by adding in return tank of top of the tower organic phase, is entered in tower by organic phase backflow.
The boiling point of hexane is 68.7 DEG C, and the azeotropic point of hexane and sec-butyl alcohol is 67 DEG C, and the azeotropic point of hexane and MEK is 64 DEG C, and the ternary azeotropic point of water, sec-butyl alcohol and hexane is 61 DEG C, and the tower top boiling point of MEK drying tower is 66 DEG C, and column bottom temperature is 95 DEG C.Therefore, hexane adds MEK drying tower by backflow, in the process of falling under tower again, heat and mass is carried out with the material risen by rectifying at the bottom of tower, and forming hexane and sec-butyl alcohol, hexane and MEK, hexane and water, sec-butyl alcohol three kinds of azeotropic mixtures steam to tower top, this process, tower top organic phase is all back to MEK drying tower by backflow, capacity of returns is comparatively large, and the energy consumption of MEK drying tower is higher.
Utility model content
The utility model provides a kind of MEK drying tower, successfully solves above problem, significantly reduces MEK drying tower reflux ratio, reduces energy consumption, meanwhile, makes the separating effect of MEK drying tower better.
The utility model provides a kind of MEK drying tower, comprise bottom reboiler, overhead condenser and return tank of top of the tower, wherein, the middle part charging aperture of MEK drying tower is connected with the first material feeding pipeline for supplying the thick MEK from MEK synthesizing section, return tank of top of the tower discharge outlet is connected with drainpipe, return tank of top of the tower oil phase outlet is connected with overhead reflux pipeline, discharging opening at the bottom of tower is connected with discharging pipeline at the bottom of tower, it is characterized in that, return tank of top of the tower oil phase outlet or overhead reflux pipeline also branch out the position that the second material feeding pipeline is connected to below refluxing opening that overhead reflux pipeline connects.
Wherein, the first material feeding pipeline supply is from the thick MEK of MEK synthesizing section, and the second material feeding pipeline supply is from the part oil phase of return tank of top of the tower oil phase outlet.
Preferably, the charging aperture that the second described material feeding pipeline connects is positioned at the position of below the middle part charging aperture of tower.
Preferably, the theoretical cam curve of described drying tower is 40-150 block, is preferably 50-120 block, is more preferably 50-100 block.
Preferably, 1-10 block theoretical tray place below the middle part charging aperture that the charging aperture that the second described material feeding pipeline connects is positioned at tower, be preferably 1-8 block theoretical tray place, be more preferably 1-6 block theoretical tray place, more preferably 2-5 block theoretical tray place.
In the utility model, by backflow being divided into two bursts of chargings, one is still overhead reflux, another strand adds MEK drying tower by the second material feeding pipeline below overhead reflux mouth, particularly add MEK drying tower by the feeding line below MEK charging aperture thick in the middle part of tower, thus reduce overhead reflux amount, thick MEK is contacted with the hexane risen of vaporizing in tower once entering in tower, two strands of materials are made to contact more abundant in tower, be more prone to be separated, meanwhile, the energy consumption of MEK drying tower is also reduced.
Advantage of the present utility model is:
1, reduce the reflux ratio of MEK drying tower, effectively reduce the load of MEK drying tower, reduce energy consumption;
2, decrease the consumption of hexane, save cost;
3, MEK drying tower is after transformation, and operation is more prone to.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of prior art MEK drying tower.
Fig. 2 is the schematic diagram of the utility model MEK drying tower.
Wherein, 1 is the first material feeding pipeline, 2 is MEK drying tower main body, and 3 is overhead condenser, and 4 is return tank of top of the tower, 5 is return tank of top of the tower flowing line, 6 is overhead reflux pipeline, and 7 is the second material feeding pipeline (that is, return tank of top of the tower oil phase outlet branch out the second material feeding pipeline), 8 is bottom reboiler, and 9 is discharging pipeline at the bottom of tower.
Detailed description of the invention
The utility model provides a kind of MEK drying tower, it comprises MEK drying tower main body 2, it is connected with the first material feeding pipeline 1 for supplying the thick MEK from MEK synthesizing section, tower top is provided with MEK drying tower overhead condenser 3 and MEK drying tower return tank of top of the tower 4, discharging pipeline 9 at the bottom of bottom reboiler 8 and tower is provided with at the bottom of tower, MEK drying tower return tank of top of the tower is provided with flowing line 5 and overhead reflux pipeline 6, branches out the second material feeding pipeline 7 from return tank of top of the tower oil phase outlet.
Embodiment 1
As shown in Figure 2, the material of MEK synthesizing section (consists of butylene 0.19wt%, sec-butyl alcohol 41.27wt%, MEK 55.93wt%, heavy thing 2.10wt%, water 0.50wt%.) enter MEK drying tower main body 2 by MEK drying tower first material feeding pipeline 1, in the tower top temperature 66 DEG C of MEK drying tower, azeotropic distillation under the condition that column bottom temperature is 95 DEG C, hexane and sec-butyl alcohol, MEK, water, sec-butyl alcohol three kinds of azeotropic mixtures steam to tower top, MEK and unreacted sec-butyl alcohol enter to discharge from discharging pipeline 9 at the bottom of MEK drying tower tower at the bottom of tower and send into MEK tower and obtain refining MEK, the sec-butyl alcohol that tower top steams, MEK, water, sec-butyl alcohol is through condenser condenses, organic phase and aqueous phase is divided into by return tank of top of the tower 4, aqueous phase send sump, organic phase is divided into two bursts of chargings (the flow-rate ratio 1:1 of the charging below overhead reflux and overhead reflux mouth), one is still overhead reflux, another strand adds MEK drying tower by the second material feeding pipeline 7 below overhead reflux mouth.
Comparative example 1
As shown in Figure 1, the material of MEK synthesizing section (consists of butylene 0.19wt%, sec-butyl alcohol 41.27wt%, MEK 55.93wt%, heavy thing 2.10wt%, water 0.50wt%.) enter MEK drying tower main body 2 by MEK drying tower first material feeding pipeline 1, in the tower top temperature 66 DEG C of MEK drying tower, azeotropic distillation under the condition that column bottom temperature is 95 DEG C, hexane and sec-butyl alcohol, MEK, water, sec-butyl alcohol three kinds of azeotropic mixtures steam to tower top, MEK and unreacted sec-butyl alcohol enter at the bottom of tower and discharge from discharging pipeline 9 at the bottom of MEK drying tower tower, send into MEK tower and obtain refining MEK, the sec-butyl alcohol that tower top steams, MEK, water, sec-butyl alcohol is through condenser condenses, organic phase and aqueous phase is divided into by return tank, aqueous phase send sump, organic phase adds MEK drying tower as overhead reflux.
Compared with comparative example 1, the tower bottom steam consumption of embodiment 1 reduces 1th/h, and hexane consumption reduces 1t, 1,500,000/year of cost savings.
More than specifically illustrate the MEK drying tower of the present embodiment; but be understandable that, those of ordinary skill in the art are using the various modification that the basis of novel open scope is made; do not departing from the utility model main scope, can think and fall into protection domain of the present utility model.
Claims (9)
1. a MEK drying tower, comprise bottom reboiler, overhead condenser and return tank of top of the tower, wherein, the middle part charging aperture of MEK drying tower is connected with the first material feeding pipeline for supplying the thick MEK from MEK synthesizing section, return tank of top of the tower discharge outlet is connected with drainpipe, return tank of top of the tower oil phase outlet is connected with overhead reflux pipeline, discharging opening at the bottom of tower is connected with discharging pipeline at the bottom of tower, it is characterized in that, return tank of top of the tower oil phase outlet or overhead reflux pipeline also branch out the position that the second material feeding pipeline is connected to below refluxing opening that overhead reflux pipeline connects.
2. MEK drying tower according to claim 1, is characterized in that, the charging aperture that the second described material feeding pipeline connects is positioned at the position of below the middle part charging aperture of tower.
3. MEK drying tower according to claim 2, is characterized in that, the theoretical cam curve of described drying tower is 40-150 block.
4. MEK drying tower according to claim 3, is characterized in that, the theoretical cam curve of described drying tower is 50-120 block.
5. MEK drying tower according to claim 4, is characterized in that, the theoretical cam curve of described drying tower is 50-100 block.
6. the MEK drying tower according to any one of claim 1-5, is characterized in that, 1-10 block theoretical tray place below the middle part charging aperture that the charging aperture that the second material feeding pipeline connects is positioned at tower.
7. MEK drying tower according to claim 6, is characterized in that, 1-8 block theoretical tray place below the middle part charging aperture that the charging aperture that the second material feeding pipeline connects is positioned at tower.
8. MEK drying tower according to claim 7, is characterized in that, 1-6 block theoretical tray place below the middle part charging aperture that the charging aperture that the second material feeding pipeline connects is positioned at tower.
9. MEK drying tower according to claim 8, is characterized in that, 2-5 block theoretical tray place below the middle part charging aperture that the charging aperture that the second material feeding pipeline connects is positioned at tower.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521097303.6U CN205216248U (en) | 2015-12-24 | 2015-12-24 | Ethyl methyl ketone drying tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521097303.6U CN205216248U (en) | 2015-12-24 | 2015-12-24 | Ethyl methyl ketone drying tower |
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| Publication Number | Publication Date |
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| CN205216248U true CN205216248U (en) | 2016-05-11 |
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| CN201521097303.6U Active CN205216248U (en) | 2015-12-24 | 2015-12-24 | Ethyl methyl ketone drying tower |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106943765A (en) * | 2017-04-06 | 2017-07-14 | 胡玉娴 | MEK drying tower |
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2015
- 2015-12-24 CN CN201521097303.6U patent/CN205216248U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106943765A (en) * | 2017-04-06 | 2017-07-14 | 胡玉娴 | MEK drying tower |
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