CN204447369U - A kind of tandem heater of acrylic acid dehydrating tower - Google Patents
A kind of tandem heater of acrylic acid dehydrating tower Download PDFInfo
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- CN204447369U CN204447369U CN201520114725.3U CN201520114725U CN204447369U CN 204447369 U CN204447369 U CN 204447369U CN 201520114725 U CN201520114725 U CN 201520114725U CN 204447369 U CN204447369 U CN 204447369U
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Abstract
A tandem heater for acrylic acid dehydrating tower, comprises, liquid header, collects the liquid declined in tower; Downspout/plate, its upper end connects liquid header; At least one dividing plate, is divided into the region that at least two tops are communicated with, forms at least two-stage Matter Transfer still by the space below liquid header in tower; At least two reboilers, body is can-like, and body is corresponding with Matter Transfer still at different levels to be arranged at outside described dehydrating tower, and its end is connected by the bottom of the pipeline Matter Transfer still corresponding with in dehydrating tower or sidewall.Outside reboiler heats the liquid in corresponding material recirculating still, and the liquid through heating returns tower reactor by pipeline again.The utility model can avoid net quantity of heat all to add in acrylic acid maximum concentration district and highest temperature zone, effectively reduces acrylic acid polymerization tendency in dehydrating tower tower reactor, decreases acroleic acid polymerization, extend the operation cycle.
Description
Technical field
The utility model relates to chemical industry heat-transfer equipment, relates to a kind of tandem heater of acrylic acid dehydrating tower particularly.
Background technology
Acrylic acid is important organic synthesis raw material and synthetic resin monomer, is polymerization speed vinyl monomer quickly.At present, the production technology extensively adopted is oxidation of propylene, and adopt the acrylic acid in water absorption reaction gas to obtain the crude acrylic acid aqueous solution, crude acrylic acid enters dehydrating tower, does entrainer dehydration with toluene.Dehydrating tower kettle material enters extracting tower, and tower top steams toluene, acetic acid (containing acrylic acid) turns back to dehydrating tower.Depickling kettle material enters treating column, and treating column tower top obtains acrylic products, and kettle material goes acrylic acid to reclaim, de-heavy constituent.
For avoiding acroleic acid polymerization, current dehydrating tower tower reactor reboiler all adopts single thermal treatment zone, pump forced cyclic type reboiler, as shown in Figure 1, the recycle stock be in dehydrating tower tower reactor A101 enters reboiler E201 through pipeline, low-pressure steam LS enters reboiler, heat the material in reboiler E201, low pressure condensed water LC flows out reboiler.Its maximum defect is that the net quantity of heat needed for dehydrating tower is all provided by reboiler E201, in whole heat transfer process, recycle stock had both been in acrylic acid concentration highest zone, also be in highest temperature area, acrylic acid polymerization is inclined to and greatly improves, dehydrating tower is difficult to long-period stable operation.
Utility model content
The purpose of this utility model is the tandem heater providing a kind of acrylic acid dehydrating tower, net quantity of heat can be avoided all to add in acrylic acid maximum concentration district and highest temperature zone, effectively reduce acrylic acid polymerization tendency in dehydrating tower tower reactor, decrease acroleic acid polymerization, extend the operation cycle.
For achieving the above object, the utility model is by the following technical solutions:
A tandem heater for acrylic acid dehydrating tower, comprises, liquid header, is arranged in dehydrating tower below column plate, and column plate underlying space in dehydrating tower is divided into upper and lower two parts, and the liquid declined in tower collected by liquid header; Downspout/plate, its upper end is connected to described liquid header; At least one dividing plate, be vertically installed in bottom described dehydrating tower tower reactor, space is left between its upper end and liquid header, space below liquid header in dehydrating tower is divided into the region that at least two tops are communicated with, form at least two-stage Matter Transfer still, described downspout/plate corresponding first order Matter Transfer still; At least two reboilers, body is can-like, and in corresponding described dehydrating tower, Matter Transfer still at different levels is arranged at outside dehydrating tower respectively, and charging aperture and discharging opening are established in the end of body, and is connected by the bottom of the pipeline Matter Transfer still corresponding with in dehydrating tower or sidewall; Body sidewall is provided with steam inlet and steam (vapor) outlet.
Further, described liquid header is ramp type liquid header, rises inflator tube type liquid header or column plate type liquid header; Preferably, described column plate type liquid header is selected from the combination of sieve plate, solid valve column plate, valve plate, parallel jet compounding tower plate, vertical sieve tray wherein one or more.
Again, in described dehydrating tower, establish 1 ~ 5 dividing plate, the space below liquid header is divided into the region that 2 ~ 6 bottoms do not communicate, form 2 ~ 6 stage material recirculating stills, and correspondence arranges reboiler respectively.
Further, establish the vertically disposed dividing plate of two or more in described dehydrating tower bottom tower reactor, the space height between dividing plate upper end and liquid header is not etc.; Preferably, between the upper end of described dividing plate and liquid header, the height in space increases successively along dehydrating tower radial direction, and the material in previous stage Matter Transfer still can enter in rear stage Matter Transfer still in overflow.
Preferably, described reboiler at different levels is identical or different, is pump forced cyclic type reboiler, thermosyphon reboiler or once by type (once-through) reboiler.
Further, circulating pump established by the pipeline that described Matter Transfer still is connected to reboiler, establish connecting pipe between the outlet conduit of the circulating pump that adjacent two-stage Matter Transfer still is corresponding, the material in previous stage Matter Transfer still is introduced in rear stage reboiler by this connecting pipe.
Again, described dividing plate arranges at least two pieces, and wherein, a divider upright is arranged at bottom dehydrating tower tower reactor; One end of another dividing plate is fixed on dehydrating tower sidewall, and the other end connects with described downspout/plate lower end.
Decline in dehydrating tower in the utility model liquid collected by liquid header, first order Matter Transfer still is imported by downspout/plate, liquid in still enters in corresponding reboiler by pipeline, after Steam Heating, liquid becomes gas-liquid mixture, this material returns first order Matter Transfer still by pipeline, gas rises and evaporates, unevaporated liquid enters second level Matter Transfer still, again heated by the reboiler of correspondence, by that analogy to afterbody Matter Transfer still, complete heating, thus realize the progressive solution to material.
The beneficial effects of the utility model:
The utility model adopts dividing plate to cut off for multistage Matter Transfer still in dehydrating tower tower reactor, the reboiler being equipped with dehydrating tower outside carries out progressive solution to material in still, make the heating-up temperature in different Matter Transfer stills different, temperature in rear stage Matter Transfer still is higher than previous stage Matter Transfer still, net quantity of heat is avoided all to add in acrylic acid maximum concentration district and highest temperature zone, significantly reduce acrylic acid polymerization tendency in dehydrating tower tower reactor, decrease acroleic acid polymerization, reduce the material consumption that polymerization produces, extend the operation cycle, eliminate the single thermal treatment zone extensively adopted at present, the technological deficiency of pump forced cyclic type reboiler.
Accompanying drawing explanation
Fig. 1 is the heater structure of typical single-stage Matter Transfer still and reboiler in prior art.
Fig. 2 is the structural representation of the utility model embodiment one, and reboiler at different levels is pump forced cyclic type.
Fig. 3 is the structural representation of the utility model embodiment one, establishes pipeline between the circulation delivery side of pump of first order circulation delivery side of pump and the second level.
Fig. 4 is the structural representation of the utility model embodiment two, and reboiler at different levels is pump forced cyclic type.
Fig. 5 is the structural representation of the utility model embodiment three, and the reboiler that first order Matter Transfer still is corresponding is heat siphon type, and the reboiler of other two-stage Matter Transfer stills adopts pump forced cyclic type.
Fig. 6 is the structural representation of the utility model embodiment four, and the reboiler that first order Matter Transfer still is corresponding is once by type, and the reboiler of other two-stage Matter Transfer stills adopts pump forced cyclic type.
Detailed description of the invention
Below in conjunction with specific embodiments and the drawings, the technical solution of the utility model is described in further detail, but is not limited to the utility model.
Embodiment one
See Fig. 2 ~ Fig. 3, the tandem heater of acrylic acid dehydrating tower of the present utility model, dehydrating tower 100 is coordinated to arrange, it comprises, liquid header 1, its base plate is fixed on the sidewall in dehydrating tower 100 tower below column plate, will be divided into upper and lower two parts in dehydrating tower, and the liquid declined in tower collected by liquid header 1; Downspout/plate 2, its upper end is connected to described liquid header 1; Dividing plate 3, be vertically installed in the bottom of tower reactor below liquid header 1, the space below liquid header in tower reactor 1 be divided into the region that two tops are communicated with, form first order Matter Transfer still A1 and second level Matter Transfer still B1 and (be called for short still A1, still B1, lower same); Downspout/plate 2 corresponding first order Matter Transfer still A1, the liquid imported from downspout/plate 2 falls into still A1, and unevaporated liquid flooding enters still B1; Reboiler A11 and B11, is arranged at outside dehydrating tower with still A1, still B1 are corresponding respectively.
Described reboiler A11 (is described for reboiler A11, lower same) be pump forced cyclic type, the body A111 of reboiler A11 is can-like, body A111 establishes charging aperture and discharging opening in end, by bottom the still A1 that pipeline A112 is corresponding with in dehydrating tower or sidewall connect, pipeline A112 establishes circulating pump A113; Body A111 sidewall is provided with steam inlet and steam (vapor) outlet, and low-pressure steam LS enters reboiler from steam inlet, heats the material in reboiler A11, and low pressure condensed water LC flows out from steam (vapor) outlet; Liquid in still A1 after the reboiler A11 of correspondence heats, then returns still A1 by pipeline A112.
Further, described liquid header is for rise inflator tube type liquid header.
Again, between the outlet of the circulating pump A113 of described first order reboiler A11 and the circulation delivery side of pump of second level reboiler, establish pipeline A112 ', the material in first order Matter Transfer still A1 is introduced second level reboiler B11.
In the present embodiment, decline in dehydrating tower tower liquid collected by liquid header, first order Matter Transfer still is imported by downspout/plate, liquid in still enters corresponding reboiler heating by pipeline through forced circulation pump, material after the Steam Heating in reboiler returns the first Matter Transfer still by pipeline, unevaporated liquid enters rear stage Matter Transfer still, then is heated by the reboiler of correspondence.
Embodiment two
See Fig. 4, two pieces of dividing plates 3 are vertically set in described acrylic acid dehydrating tower, 3 ', space below liquid header in tower reactor 1 is divided into three Matter Transfer stills, i.e. first order Matter Transfer still A1, second level Matter Transfer still B1 and third level Matter Transfer still C1 (are called for short still A1, still B1, still C1, lower same); Non-evaporating liquid enters still B1 from still A1 overflow, in still B1 non-evaporating liquid again overflow enter still C1; Correspondence arranges three reboiler A11, B11, C11.
In the present embodiment, reboiler at different levels is pump forced cyclic type reboiler.
Embodiment three
See Fig. 5, the reboiler A11 that in the present embodiment, still A1 is corresponding adopts thermosyphon reboiler.
Embodiment four
See Fig. 6, two pieces of dividing plates 3,3 ' are set in described acrylic acid dehydrating tower 100, the space below liquid header in tower reactor 1 are divided into three Matter Transfer stills; Wherein, one end of dividing plate 3 is fixed on dehydrating tower 100 sidewall, and the other end connects with described downspout/plate 2 lower end; Dividing plate 3 ' is vertically installed in bottom dehydrating tower 100 tower reactor.
The reboiler A11 that in the present embodiment, still A1 is corresponding adopts once by type reboiler.
In the utility model, be cut off as multiple region in dehydrating tower tower reactor, form multistage Matter Transfer still, material in tower reactor is carried out progressive solution, avoids net quantity of heat all to add in acrylic acid maximum concentration district and highest temperature zone, significantly reduce acrylic acid polymerization tendency in dehydrating tower tower reactor, decrease acroleic acid polymerization, the material consumption that minimizing polymerization produces, extends the operation cycle, eliminates at present extensively single thermal treatment zone of employing, the technological deficiency of pump forced cyclic type reboiler.Meanwhile, due to the reduction of thermal treatment zone operating temperature, relatively increase effective heat transfer temperature difference, therefore significantly can reduce reboiler THS and amass, reduce equipment investment, there is broad prospect of application.
Claims (10)
1. a tandem heater for acrylic acid dehydrating tower, is characterized in that, comprise,
Liquid header, is arranged in dehydrating tower below column plate, and column plate underlying space in dehydrating tower is divided into upper and lower two parts, and the liquid declined in tower collected by liquid header;
Downspout/plate, its upper end is connected to described liquid header;
At least one dividing plate, be vertically installed in bottom described dehydrating tower tower reactor, space is left between its upper end and liquid header, space below liquid header in dehydrating tower is divided into the region that at least two tops are communicated with, form at least two-stage Matter Transfer still, described downspout/plate corresponding first order Matter Transfer still;
At least two reboilers, body is can-like, and in corresponding described dehydrating tower, Matter Transfer still at different levels is arranged at outside dehydrating tower respectively, and charging aperture and discharging opening are established in the end of body, and is connected by the bottom of the pipeline Matter Transfer still corresponding with in dehydrating tower or sidewall; Body sidewall is provided with steam inlet and steam (vapor) outlet.
2. the tandem heater of acrylic acid dehydrating tower according to claim 1, is characterized in that, described liquid header is ramp type liquid header, rises inflator tube type liquid header or column plate type liquid header.
3. the tandem heater of acrylic acid dehydrating tower according to claim 2, is characterized in that, described column plate type liquid header is the combination of one or more in sieve plate, solid valve column plate, valve plate, parallel jet compounding tower plate, vertical sieve tray.
4. the tandem heater of acrylic acid dehydrating tower according to claim 1, it is characterized in that, in described dehydrating tower, establish 1 ~ 5 dividing plate, the space below liquid header is divided into the region that 2 ~ 6 bottoms do not communicate, form 2 ~ 6 stage material recirculating stills, and correspondence arranges reboiler respectively.
5. the tandem heater of acrylic acid dehydrating tower according to claim 1, is characterized in that, establishes the vertically disposed dividing plate of two or more in described dehydrating tower bottom tower reactor, and the space height between dividing plate upper end and liquid header is not etc.
6. the tandem heater of acrylic acid dehydrating tower according to claim 5, is characterized in that, between the upper end of described dividing plate and liquid header, the height in space increases successively along dehydrating tower radial direction.
7. the tandem heater of the acrylic acid dehydrating tower according to any one of Claims 1-4, it is characterized in that, the reboiler of described different stage Matter Transfer still is identical or different, is selected from pump forced cyclic type reboiler, thermosyphon reboiler or once by type reboiler.
8. the tandem heater of acrylic acid dehydrating tower according to claim 4, is characterized in that, circulating pump established by the pipeline that described Matter Transfer still is connected to reboiler.
9. the tandem heater of acrylic acid dehydrating tower according to claim 8, is characterized in that, establishes connecting pipe between the outlet conduit of the circulating pump that adjacent two-stage Matter Transfer still is corresponding.
10. the tandem heater of acrylic acid dehydrating tower according to claim 1, is characterized in that, described dividing plate arranges at least two pieces, and wherein, a divider upright is arranged at bottom dehydrating tower tower reactor; One end of another dividing plate is fixed on dehydrating tower sidewall, and the other end connects with described downspout/plate lower end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201520114725.3U CN204447369U (en) | 2015-02-17 | 2015-02-17 | A kind of tandem heater of acrylic acid dehydrating tower |
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| CN201520114725.3U CN204447369U (en) | 2015-02-17 | 2015-02-17 | A kind of tandem heater of acrylic acid dehydrating tower |
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| CN204447369U true CN204447369U (en) | 2015-07-08 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113209657A (en) * | 2021-05-08 | 2021-08-06 | 北京化工大学 | Double-partition reaction tower for inhibiting quaternary cascade side reaction and process thereof |
| CN113813633A (en) * | 2021-09-29 | 2021-12-21 | 聊城鲁西氯甲烷化工有限公司 | Chloroform rectification device and rectification process |
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2015
- 2015-02-17 CN CN201520114725.3U patent/CN204447369U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113209657A (en) * | 2021-05-08 | 2021-08-06 | 北京化工大学 | Double-partition reaction tower for inhibiting quaternary cascade side reaction and process thereof |
| CN113209657B (en) * | 2021-05-08 | 2022-06-21 | 北京化工大学 | Double-bulkhead reaction tower for inhibiting quaternary cascade side reaction and process thereof |
| CN113813633A (en) * | 2021-09-29 | 2021-12-21 | 聊城鲁西氯甲烷化工有限公司 | Chloroform rectification device and rectification process |
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