CN202039003U - PET esterification reactor - Google Patents
PET esterification reactor Download PDFInfo
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- CN202039003U CN202039003U CN2011201263877U CN201120126387U CN202039003U CN 202039003 U CN202039003 U CN 202039003U CN 2011201263877 U CN2011201263877 U CN 2011201263877U CN 201120126387 U CN201120126387 U CN 201120126387U CN 202039003 U CN202039003 U CN 202039003U
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- esterification
- reaction kettle
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- ethylene glycol
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Abstract
The utility model relates to a PET (polyester) esterification reactor, which comprises a reactor body, and is characterized in that the reactor body comprises a small cavity at the lower end part, and a large cavity at the upper end part, wherein a lower heating coil and an upper heating coil are respectively arranged corresponding to the lower end parts of the small cavity and the large cavity, the outer side of the reactor body is provided with a circulation pipeline, a feed port positioned at the upper part of the circulation pipeline is communicated with the large cavity, a discharge port positioned at the lower part of the circulation pipeline is communicated with the small cavity, and the circulation pipeline is also provided with a slurry filling opening and an esterification discharge hole which are arranged at intervals. Compared with the prior art, the utility model has the advantages that an external circulating pipeline is designed to replace a stirrer so as to achieve the purposes of energy saving and consumption reduction; and the investment in the stirrer and matched devices of the conventional esterification reactor is reduced, the operating cost in production is reduced, equipment maintenance in the production process is reduced, and production control is simplified.
Description
Technical field
The utility model relates to a kind of reaction kettle of the esterification, relates in particular to a kind of polyethylene terephthalate (PET) reaction kettle of the esterification.
Background technology
At present, the design of the known reaction kettle of the esterification of polyethylene terephthalate (PET) production equipment is that " on put " formula or " underlying " formula agitator is being set on the reactor, to advance reactant to mix, flow rate, accelerate material reaction, the open source literature of this class can referenced patent number is the Chinese utility model patent " new and effective esterifier " (Granted publication CN2444948Y) of ZL00259656.3, can also be with reference to the Chinese utility model " multistage stirring spray-type reaction kettle of the esterification " (Granted publication CN201002005Y) of ZL200720002654.3, similarly can also be with reference to CN201695019U, though it is more even that disclosed this class reaction kettle of the esterification reactant mixes, and also has a lot of shortcomings:
At first, the input that has agitator, market price is about about 1,000,000 yuans to produce 200000 tons of PET production equipment reaction kettle of the esterification, one cover agitator (containing motor, reduction box, mechanical envelope, cooling system, lubricating oil, agitator etc.) per year, and company investment cost is bigger; Though the esterifier of a small amount of no agitator is also arranged at present, and well heater and esterification separated space take bigger, the device fabrication cost is very high; Secondly, regularly there is the normal consume of lubricating oil, mechanical seal, bearing etc. in the known consumption that has the agitator reaction kettle of the esterification to continue to exist electric energy in process of production for a long time, forms higher running cost; Once more, in use there is the industrial accident hidden danger of reasons such as unusual mechanical wear in the reaction kettle of the esterification agitator; At last, because complex structure exists a large amount of equipment and process maintenance work.
As improvement, several no churned mechanically reaction kettle of the esterification are disclosed again in the prior art, as application number is open " hybrid polyester esterification reactor " (the publication number CN101613467A) of 200910085293.7 Chinese invention patent application, this application comprises reacting by heating jar and evaporation reaction jar, also comprise the dynamic mixing section, described reacting by heating jar outlet is communicated with evaporation reaction jar inlet, described dynamic mixing section be provided with Venturi tube and with the supporting power-driven pump of described Venturi tube, the entrance and exit of dynamic mixing section connects described evaporation reaction jar outlet and described reacting by heating jar inlet respectively, the formation circulation passage of material thus, described Venturi tube is provided with suction port, is used to introduce new slurry.This application has utilized Venturi tube to carry out the mixing of slip simultaneously at the suction slurry, improved mixed effect effectively, simultaneously with power-driven pump with add heat power and combine, form the circulation of slip effectively, make the one-piece construction of reactor more simple, operate more easyly, mixing of materials is more even, more helps esterification; Reduced the stirring cost in addition.
The utility model content
Technical problem to be solved in the utility model is that a kind of PET reaction kettle of the esterification that can reduce the production run cost and reduce maintenance of the equipment work is provided in addition at the above-mentioned state of the art.
The utility model solves the problems of the technologies described above the technical scheme that is adopted: a kind of PET reaction kettle of the esterification, comprise kettle, it is characterized in that described kettle comprises the little cavity of bottom and the big cavity of upper end, the bottom of corresponding aforesaid little cavity and big cavity is provided with down heating coil and upper heating disk pipe respectively, and, the described kettle outside is provided with a circulation line, the superposed charging port of this circulation line is communicated with aforesaid big cavity, the discharging port that is positioned at the bottom is communicated with aforesaid loculus body, the esterification discharge port that also is provided with the slurry inlet on this circulation line and is provided with at interval with the slurry inlet.
PTA and EG are the little cavity that mixed slurry (about 85 ℃ of temperature) the autoreaction still bottom feed fillup valve of main component injects reactor, process heating coil down is heated to about 255 ℃ to material, material is along with the rising of temperature in heat-processed, material utilizes hot-fluid to learn principle to flow from bottom to top and provide circulation power for carboxylate, reach about 265 ℃ through upper heating disk pipe heating temperature of charge, material through the heating of upper heating disk pipe arrives in the big cavity of reactor, under big evaporation area condition, improve water byproduct, the precipitation rate of low-boiling by-products such as acetaldehyde is effectively removed water byproduct that material produces and acetaldehyde etc. in transesterification reaction.The circulation line that simultaneously certain level of response material connects by kettle is back to autoclave body bottom and is mixed in the still secondary response again with raw feed, and provide up hot kinetic energy for newly advancing material, react to circulation line by upper and lower heating coil heating once more.Can reach 95% ± 2 by this material circulation and reaction process PTA/EG esterification yield, the material that reaches specified degree carries out discharging by the discharging pipeline on the circulation line and enters the next stage reaction.
Further, have the heating agent of heating in the described down heating coil and be provided with first variable valve of control heating agent flow, be provided with in the described little cavity one with the first chain temperature sensor of aforementioned first variable valve;
Have the heating agent of heating in the described upper heating disk pipe and be provided with second variable valve of control heating agent flow, be provided with in the described big cavity one with the second chain temperature sensor of aforementioned second variable valve.
For further improving mixed effect, be equipped with in described little cavity and the big cavity and give the interceptor that slurry increases resistance to flow.As preferably, described interceptor is coniform and vertical setting.
Further, described kettle top is provided with and is used for water liquid separation processes tower, be provided with a shower and three-temperature sensor in this process tower, the external technology water pipe of this shower, this technology water pipe is provided with one first pressure unit and reaches and first pressure unit and the 3rd all chain variable valve of three-temperature sensor, this process tower top is connected with an escape pipe, and this escape pipe is provided with second pressure unit and and the 4th chain variable valve of second pressure unit.
Further, this reaction kettle of the esterification also is connected with ethylene glycol supply line and ethylene glycol return line, and the ethylene glycol catch tray in ethylene glycol return line and the described process tower is connected.
Described ethylene glycol supply line is provided with twin pump and has first branch road and second branch road in parallel, aforesaid first branch road leads in the aforesaid process tower and with the ethylene glycol return line and forms circulation line, and aforesaid second branch road leads in the described big cavity reaction raw materials is provided.
The discharge port of described ethylene glycol return line is provided with one the 5th variable valve, described process tower be provided with one with described twin pump and all chain liquidometer of the 5th variable valve, described second branch road is provided with flow and takes into account six variable valve chain with under meter.
Be provided with the heating agent heating coil in the described ethylene glycol catch tray.For follow-up rectifying provides hot kinetic energy.
As preferably, described slurry inlet is near the lower port of circulation line, and the axial length of little cavity is greater than the axial length of big cavity.Axially long little cavity helps increasing the mixed effect of material
Compared with prior art, advantage of the present utility model is: adopt the setting in conjunction with upper and lower heating coil of little cavity and big cavity, utilize the liquid object hot-fluid to learn mechanism, divide and lead flow direction of material, make mixing of materials even, closely reach the harmony of level of response, reached the purpose that stirs; Owing to adopt no agitator design, adopt the design of outer circulation pipeline to replace agitator, reach energy saving purposes; Reduced the agitator means of traditional reaction kettle of the esterification and the fund input of auxiliary facility, reduced the production run cost, reduced the maintenance of the equipment work in the production process and simplified production control.
Description of drawings
Fig. 1 is the example structure synoptic diagram.
Embodiment
Embodiment describes in further detail the utility model below in conjunction with accompanying drawing.
As shown in Figure 1, PET reaction kettle of the esterification in the present embodiment comprises kettle 1, process tower 14 and circulation line 2, kettle 1 comprises the loculus body 11 of bottom and the big cavity 12 of upper end, the internal diameter of loculus body 11 is less than the internal diameter of big cavity 12, the axial length of loculus body 11 is greater than the axial length of big cavity 12, be equipped with in loculus body 11 and the big cavity 12 and give the interceptor 13 that slurry increases resistance to flow, interceptor 13 is coniform and vertical setting.The bottom of corresponding loculus body 11 and big cavity 12 is provided with down heating coil 31 and upper heating disk pipe 32 respectively.
Have the heating agent of heating in the following heating coil 31 and be provided with first variable valve 41 of control heating agent flow, be provided with the first chain temperature sensor 51 of one and first variable valve 41 in the loculus body 11; Have the heating agent of heating in the upper heating disk pipe 32 and be provided with second variable valve 42 of control heating agent flow, be provided with the second chain temperature sensor 52 of one and second variable valve 42 in the big cavity 12.
Reaction kettle of the esterification also is connected with ethylene glycol supply line and ethylene glycol return line, the discharge port of ethylene glycol return line is provided with the 5th variable valve 45, ethylene glycol catch tray 15 in ethylene glycol return line and the process tower 14 is connected, be provided with heating agent heating coil 33 in the ethylene glycol catch tray 15, for follow-up rectifying provides hot kinetic energy.The ethylene glycol supply line is provided with twin pump 8 and has first branch road and second branch road in parallel, and first branch road leads in the process tower 14 and with the ethylene glycol return line and forms circulation line, and second branch road leads in the big cavity 12 reaction raw materials is provided.Second branch road is provided with under meter 63 and six variable valve 46 chain with under meter 63.Twin pump 8 and the 5th variable valve 45 equal liquidometers 71 are chain.
Wherein, first temperature sensor 51 and first variable valve 41 constitute a PID automatic control loop, second temperature sensor 52 and second variable valve 42 constitute a PID automatic control loop, first pressure unit 61 and three-temperature sensor 53 and the 3rd variable valve 43 constitute a PID automatic control loop, second pressure unit 62 and the 4th variable valve 44 constitute a PID automatic control loop, twin pump 8, the 5th variable valve 45 constitute a PID automatic control loop with liquidometer 71, and under meter 63 and the 6th variable valve 46 constitute a PID automatic control loop.The water byproduct that the reaction that process tower 14 utilizes the boiling point temperature difference of ethylene glycol, water to be used for separating to carry secretly in the ethylene glycol that evaporates from material produces is so that obtain the lower ethylene glycol of water content.
PTA and EG are the little cavity that mixed slurry (about 85 ℃ of temperature) the autoreaction still bottom feed fillup valve of main component injects reactor, process heating coil down is heated to about 255 ℃ to material, material is along with the rising of temperature in heat-processed, material utilizes hot-fluid to learn principle to flow from bottom to top and provide circulation power for carboxylate, reach about 265 ℃ through upper heating disk pipe heating temperature of charge, material through the heating of upper heating disk pipe arrives in the big cavity of reactor, under big evaporation area condition, improve water byproduct, the precipitation rate of low-boiling by-products such as acetaldehyde is effectively removed water byproduct that material produces and acetaldehyde etc. in transesterification reaction.The circulation line that simultaneously certain level of response material connects by kettle is back to autoclave body bottom and is mixed in the still secondary response again with raw feed, and provide up hot kinetic energy for newly advancing material, react to circulation line by upper and lower heating coil heating once more.Can reach 95% ± 2 by this material circulation and reaction process PTA/EG esterification yield, the material that reaches specified degree carries out discharging by the discharging pipeline on the circulation line and enters the next stage reaction.
Adopt the setting of little cavity and big cavity, utilize the liquid object hot-fluid to learn mechanism, divide and lead flow direction of material, make mixing of materials even, closely reach the harmony of level of response, reached the purpose that stirs in conjunction with upper and lower heating coil; Because adopt no agitator design, tower, still and well heater connected structure make equipment compacter; Adopt the design of outer circulation pipeline to replace agitator, reach energy saving purposes; Reduced the agitator means of traditional reaction kettle of the esterification and the fund input of auxiliary facility, reduced the production run cost, reduced the maintenance of the equipment work in the production process and simplified production control.
Claims (10)
1. PET reaction kettle of the esterification, comprise kettle, it is characterized in that described kettle comprises the little cavity of bottom and the big cavity of upper end, the bottom of corresponding aforesaid little cavity and big cavity is provided with down heating coil and upper heating disk pipe respectively, and, the described kettle outside is provided with a circulation line, the superposed charging port of this circulation line is communicated with aforesaid big cavity, the discharging port that is positioned at the bottom is communicated with aforesaid loculus body, the esterification discharge port that also is provided with the slurry inlet on this circulation line and is provided with at interval with the slurry inlet.
2. PET reaction kettle of the esterification according to claim 1, it is characterized in that first variable valve that has the heating agent of heating in the described down heating coil and be provided with control heating agent flow, be provided with in the described little cavity one with the first chain temperature sensor of aforementioned first variable valve;
Have the heating agent of heating in the described upper heating disk pipe and be provided with second variable valve of control heating agent flow, be provided with in the described big cavity one with the second chain temperature sensor of aforementioned second variable valve.
3. PET reaction kettle of the esterification according to claim 1 and 2 is characterized in that being equipped with the interceptor that gives slurry increase resistance to flow in described little cavity and the big cavity.
4. PET reaction kettle of the esterification according to claim 3 is characterized in that described interceptor is coniform and vertical setting.
5. PET reaction kettle of the esterification according to claim 1 and 2, it is characterized in that described kettle top is provided with is used for water liquid separation processes tower, be provided with a shower and three-temperature sensor in this process tower, the external technology water pipe of this shower, this technology water pipe is provided with one first pressure unit and reaches and first pressure unit and the 3rd all chain variable valve of three-temperature sensor, this process tower top is connected with an escape pipe, and this escape pipe is provided with second pressure unit and and the 4th chain variable valve of second pressure unit.
6. PET reaction kettle of the esterification according to claim 5 is characterized in that this reaction kettle of the esterification also is connected with ethylene glycol supply line and ethylene glycol return line, and the ethylene glycol catch tray in ethylene glycol return line and the described process tower is connected.
7. PET reaction kettle of the esterification according to claim 6, it is characterized in that described ethylene glycol supply line is provided with twin pump and has first branch road and second branch road in parallel, aforesaid first branch road leads in the aforesaid process tower and with the ethylene glycol return line and forms circulation line, and aforesaid second branch road leads in the described big cavity reaction raw materials is provided.
8. PET reaction kettle of the esterification according to claim 7, the discharge port that it is characterized in that described ethylene glycol return line is provided with one the 5th variable valve, described process tower be provided with one with described twin pump and all chain liquidometer of the 5th variable valve, described second branch road is provided with flow and takes into account six variable valve chain with under meter.
9. PET reaction kettle of the esterification according to claim 6 is characterized in that being provided with the heating agent heating coil in the described ethylene glycol catch tray.
10. PET reaction kettle of the esterification according to claim 1 is characterized in that described slurry inlet near the lower port of circulation line, and the axial length of described little cavity is greater than the axial length of big cavity,
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201263877U CN202039003U (en) | 2011-04-18 | 2011-04-18 | PET esterification reactor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011201263877U CN202039003U (en) | 2011-04-18 | 2011-04-18 | PET esterification reactor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202039003U true CN202039003U (en) | 2011-11-16 |
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ID=44966458
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011201263877U Expired - Lifetime CN202039003U (en) | 2011-04-18 | 2011-04-18 | PET esterification reactor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202039003U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102181047A (en) * | 2011-04-18 | 2011-09-14 | 浙江万凯新材料有限公司 | Polyethylene terephthalate (PET) esterification reaction kettle |
-
2011
- 2011-04-18 CN CN2011201263877U patent/CN202039003U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102181047A (en) * | 2011-04-18 | 2011-09-14 | 浙江万凯新材料有限公司 | Polyethylene terephthalate (PET) esterification reaction kettle |
| CN102181047B (en) * | 2011-04-18 | 2012-09-05 | 浙江万凯新材料有限公司 | Polyethylene terephthalate (PET) esterification reaction kettle |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20111116 Effective date of abandoning: 20120905 |