CN204973920U - Pre -polymerization reation kettle's EG circulation supply control system that sprays - Google Patents
Pre -polymerization reation kettle's EG circulation supply control system that sprays Download PDFInfo
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- CN204973920U CN204973920U CN201520571820.6U CN201520571820U CN204973920U CN 204973920 U CN204973920 U CN 204973920U CN 201520571820 U CN201520571820 U CN 201520571820U CN 204973920 U CN204973920 U CN 204973920U
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Abstract
The utility model relates to a pre -polymerization reation kettle's EG circulation supply control system that sprays, it includes pre -polymerization reation kettle (1), pre -polymerization one -level spray set (2), pre -polymerization second grade spray set (3), pre -polymerization hot -well (4), pre -polymerization pre -heater (5), pre -polymerization filter (6), pre -polymerization tubular heat exchanger group (7), the cold well (8) of pre -polymerization, plate heat exchanger (9) and vacuum pumping unit (24) its characterized in that. The utility model has the advantages of to spray EG recycles improve utilization efficiency.
Description
Technical field
The utility model relates to a kind of spray EG circulation supply control system of prepolymerization reaction still.
Background technology
Polyester belongs to macromolecular compound, is to produce PETG (PET) by terephthalic acid (TPA) and ethylene glycol (EG) through polycondensation, and part PET wherein is finally generated by underwater cutpellet again.In production PET Process, carry out needing when vacuumizing spray to adopt EG spray at prepolymerization reaction still and final polymerization tank, the EG amount adopted due to EG spray is larger, therefore seek one to be recycled by spray EG, the spray EG circulation supply control system improving the prepolymerization reaction still of utilization ratio is particularly important.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned deficiency, provides a kind of and is recycled by spray EG, improve the spray EG circulation supply control system of the prepolymerization reaction still of utilization ratio.
The purpose of this utility model is achieved in that
A kind of spray EG circulation supply control system of prepolymerization reaction still, it is characterized in that it comprises prepolymerization reaction still, pre-polymerization one-level spray equipment, pre-polymerization secondary spray equipment, pre-polymerization hot well, pre-polymerization preheater, pre-polymerization filter set, pre-polymerization pipe heat exchanger group, the cold well of pre-polymerization, plate type heat exchanger and vacuumizes unit
Wherein:
The top of prepolymerization reaction still is connected by pre-polymerization vacuum lead with the top of pre-polymerization one-level spray equipment, the bottom of pre-polymerization secondary spray equipment is connected by spraying connecting pipe with the hypomere of pre-polymerization one-level spray equipment, the top of pre-polymerization secondary spray equipment is connected with the top of pre-polymerization one-level spray equipment and vacuumizes unit, pre-polymerization vacuum lead is provided with pre-polymerization pressure transmitter, the pipeline at pre-polymerization secondary spray equipment top is provided with pre-polymerization flow control valve, the signal transmission of pre-polymerization pressure transmitter is to pre-polymerization pressure controller, thus control the aperture of pre-polymerization flow control valve,
Discharging opening bottom pre-polymerization one-level spray equipment connects the charging aperture at pre-polymerization hot well top by pipeline, discharging opening bottom pre-polymerization hot well connects the charging aperture at pre-polymerization preheater top by pre-polymerization screw rod conveyor, the discharging opening of pre-polymerization hot well epimere also connects the charging aperture at pre-polymerization preheater top by pipeline, the first discharging opening bottom pre-polymerization preheater connects the charging aperture of pre-polymerization filter set by pipeline, the discharging opening of pre-polymerization filter set connects the charging aperture of pre-polymerization pipe heat exchanger by pipeline, the discharging opening of pre-polymerization pipe heat exchanger connects the charging aperture of pre-polymerization one-level spray equipment by pipeline,
Discharging opening bottom pre-polymerization secondary spray equipment connects the charging aperture at pre-polymerization Leng Jing top by pipeline, the discharging opening of the cold bottom of pre-polymerization connects main pipe rail, this main pipe rail separates again the charging aperture of two bye-pass connecting plate type heat exchangers, the discharging opening of plate type heat exchanger connects the charging aperture of pre-polymerization secondary spray equipment
Discharge gate bottom pre-polymerization filter set and the discharge gate bottom pre-polymerization pipe heat exchanger group are connected the charging aperture at pre-polymerization hot well top respectively by a bye-pass,
Pipeline between pre-polymerization filter set to pre-polymerization pipe heat exchanger group also separates bye-pass, the charging aperture of bye-pass stable connection EG tank top, the discharging opening stablizing EG tank connects the charging aperture at pre-polymerization hot well top by pipeline.
Pre-polymerization filter set is parallel with two pre-polymerization filters;
Pre-polymerization pipe heat exchanger group has three pre-polymerization pipe heat exchangers, and three pre-polymerization heat exchangers control series, parallel or connection in series-parallel syntagmatic by the break-make of multiple shutoff valve;
Plate type heat exchanger has been arranged in parallel three plate type heat exchangers.
Compared with prior art, the beneficial effects of the utility model are:
The spray EG circulation supply control system of the utility model prepolymerization reaction still has and is recycled by spray EG, improves the advantage of utilization ratio, and has the high advantage of auto-adjustment control performance.
Accompanying drawing explanation
Fig. 1 is the structural representation of the spray EG circulation supply control system of the utility model prepolymerization reaction still.
Fig. 2 is that the signal of pre-polymerization pressure transmitter and pre-polymerization flow control valve controls schematic diagram.
Detailed description of the invention
See Fig. 1 ~ Fig. 2, the spray EG circulation supply control system of a kind of prepolymerization reaction still that the utility model relates to, it comprises prepolymerization reaction still 1, pre-polymerization one-level spray equipment 2, pre-polymerization secondary spray equipment 3, pre-polymerization hot well 4, pre-polymerization preheater 5, pre-polymerization filter set 6, pre-polymerization pipe heat exchanger group 7, the cold well 8 of pre-polymerization, plate type heat exchanger 9 and vacuumizes unit 24.
Pre-polymerization one-level spray equipment 2 comprises upper and lower two-layer spray;
Pre-polymerization secondary spray equipment 3 comprises upper and lower two-layer spray;
Pre-polymerization filter set 6 is parallel with two pre-polymerization filters;
Pre-polymerization pipe heat exchanger group 7 has three pre-polymerization pipe heat exchangers, and three pre-polymerization heat exchangers control series, parallel or connection in series-parallel syntagmatic by the break-make of multiple shutoff valve;
Plate type heat exchanger 9 has been arranged in parallel three plate type heat exchangers.
Wherein:
The top of prepolymerization reaction still 1 is connected by pre-polymerization vacuum lead with the top of pre-polymerization one-level spray equipment 2, the bottom of pre-polymerization secondary spray equipment 3 is connected by spraying connecting pipe with the hypomere of pre-polymerization one-level spray equipment 2, and the top of pre-polymerization secondary spray equipment 3 is connected with the top of pre-polymerization one-level spray equipment 2 and vacuumizes unit 24.Pre-polymerization vacuum lead is provided with pre-polymerization pressure transmitter, the pipeline at pre-polymerization secondary spray equipment 3 top is provided with pre-polymerization flow control valve, the signal transmission of pre-polymerization pressure transmitter to pre-polymerization pressure controller, thus controls the aperture of pre-polymerization flow control valve.
Discharging opening bottom pre-polymerization one-level spray equipment 2 connects the charging aperture at pre-polymerization hot well 4 top by pipeline, discharging opening bottom pre-polymerization hot well 4 connects the charging aperture at pre-polymerization preheater 5 top by pre-polymerization screw rod conveyor, the discharging opening of pre-polymerization hot well 4 epimere also connects the charging aperture at pre-polymerization preheater 5 top by pipeline, the first discharging opening bottom pre-polymerization preheater 5 connects the charging aperture of pre-polymerization filter set 6 by pipeline, this pipeline is arranged in parallel two delivery pumps, the discharging opening of pre-polymerization filter set 6 connects the charging aperture of pre-polymerization pipe heat exchanger 7 by pipeline, the discharging opening of pre-polymerization pipe heat exchanger 7 connects the charging aperture of pre-polymerization one-level spray equipment 2 by pipeline.
Discharging opening bottom pre-polymerization secondary spray equipment 3 connects the charging aperture at pre-polymerization cold well 8 top by pipeline, discharging opening bottom the cold well 8 of pre-polymerization connects main pipe rail, this main pipe rail is provided with three delivery pumps in parallel, this main pipe rail at three delivery pump rears separates again the charging aperture of two bye-pass connecting plate type heat exchangers 9, and the discharging opening of plate type heat exchanger 9 connects the charging aperture of pre-polymerization secondary spray equipment 3.
Discharge gate bottom pre-polymerization filter set 6 and the discharge gate bottom pre-polymerization pipe heat exchanger group 7 are connected the charging aperture at pre-polymerization hot well 4 top respectively by a bye-pass.
Pipeline between pre-polymerization filter set 6 to pre-polymerization pipe heat exchanger group 7 also separates bye-pass, the charging aperture at bye-pass stable connection EG tank 22 top, the discharging opening stablizing EG tank 22 connects the charging aperture at pre-polymerization hot well 4 top by pipeline.
Claims (4)
1. the spray EG circulation supply control system of a prepolymerization reaction still, it is characterized in that it comprises prepolymerization reaction still (1), pre-polymerization one-level spray equipment (2), pre-polymerization secondary spray equipment (3), pre-polymerization hot well (4), pre-polymerization preheater (5), pre-polymerization filter set (6), pre-polymerization pipe heat exchanger group (7), the cold well of pre-polymerization (8), plate type heat exchanger (9) and vacuumizes unit (24)
Wherein:
The top of prepolymerization reaction still (1) is connected by pre-polymerization vacuum lead with the top of pre-polymerization one-level spray equipment (2), the bottom of pre-polymerization secondary spray equipment (3) is connected by spraying connecting pipe with the hypomere of pre-polymerization one-level spray equipment (2), the top of pre-polymerization secondary spray equipment (3) is connected with the top of pre-polymerization one-level spray equipment (2) and vacuumizes unit (24), pre-polymerization vacuum lead is provided with pre-polymerization pressure transmitter, the pipeline at pre-polymerization secondary spray equipment (3) top is provided with pre-polymerization flow control valve, the signal transmission of pre-polymerization pressure transmitter is to pre-polymerization pressure controller, thus control the aperture of pre-polymerization flow control valve,
The discharging opening of pre-polymerization one-level spray equipment (2) bottom connects the charging aperture at pre-polymerization hot well (4) top by pipeline, the discharging opening of pre-polymerization hot well (4) bottom connects the charging aperture at pre-polymerization preheater (5) top by pre-polymerization screw rod conveyor, the discharging opening of pre-polymerization hot well (4) epimere also connects the charging aperture at pre-polymerization preheater (5) top by pipeline, first discharging opening of pre-polymerization preheater (5) bottom connects the charging aperture of pre-polymerization filter set (6) by pipeline, the discharging opening of pre-polymerization filter set (6) connects the charging aperture of pre-polymerization pipe heat exchanger (7) by pipeline, the discharging opening of pre-polymerization pipe heat exchanger (7) connects the charging aperture of pre-polymerization one-level spray equipment (2) by pipeline,
The discharging opening of pre-polymerization secondary spray equipment (3) bottom connects the charging aperture at pre-polymerization cold well (8) top by pipeline, the discharging opening of the cold well of pre-polymerization (8) bottom connects main pipe rail, this main pipe rail separates again the charging aperture of two bye-pass connecting plate type heat exchangers (9), the discharging opening of plate type heat exchanger (9) connects the charging aperture of pre-polymerization secondary spray equipment (3)
The discharge gate of pre-polymerization filter set (6) bottom and the discharge gate of pre-polymerization pipe heat exchanger group (7) bottom are connected the charging aperture at pre-polymerization hot well (4) top respectively by a bye-pass,
Pipeline between pre-polymerization filter set (6) to pre-polymerization pipe heat exchanger group (7) also separates bye-pass, the charging aperture at bye-pass stable connection EG tank (22) top, the discharging opening stablizing EG tank (22) connects the charging aperture at pre-polymerization hot well (4) top by pipeline.
2. the spray EG circulation supply control system of a kind of prepolymerization reaction still according to claim 1, is characterized in that pre-polymerization filter set (6) is parallel with two pre-polymerization filters.
3. the spray EG circulation supply control system of a kind of prepolymerization reaction still according to claim 1, it is characterized in that pre-polymerization pipe heat exchanger group (7) has three pre-polymerization pipe heat exchangers, three pre-polymerization heat exchangers control series, parallel or connection in series-parallel syntagmatic by the break-make of multiple shutoff valve.
4. the spray EG circulation supply control system of a kind of prepolymerization reaction still according to claim 1, is characterized in that plate type heat exchanger (9) has been arranged in parallel three plate type heat exchangers.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520571820.6U CN204973920U (en) | 2015-08-03 | 2015-08-03 | Pre -polymerization reation kettle's EG circulation supply control system that sprays |
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| CN201520571820.6U CN204973920U (en) | 2015-08-03 | 2015-08-03 | Pre -polymerization reation kettle's EG circulation supply control system that sprays |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105820323A (en) * | 2016-05-18 | 2016-08-03 | 江苏兴业塑化股份有限公司 | Continuous polymerization process EG circulation system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105820323A (en) * | 2016-05-18 | 2016-08-03 | 江苏兴业塑化股份有限公司 | Continuous polymerization process EG circulation system |
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