CN105032331A - Spraying EG circulating supply control device of prepolymerization reaction kettle - Google Patents
Spraying EG circulating supply control device of prepolymerization reaction kettle Download PDFInfo
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- CN105032331A CN105032331A CN201510465524.2A CN201510465524A CN105032331A CN 105032331 A CN105032331 A CN 105032331A CN 201510465524 A CN201510465524 A CN 201510465524A CN 105032331 A CN105032331 A CN 105032331A
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Abstract
The invention relates to a spray EG circulation supply control device of a prepolymerization reaction kettle, which is characterized by comprising a prepolymerization reaction kettle (1), a prepolymerization primary spray device (2), a prepolymerization secondary spray device (3), a prepolymerization hot well (4), a prepolymerization preheater (5), a prepolymerization filter group (6), a prepolymerization tubular heat exchanger group (7), a prepolymerization cold well (8), a plate-type heat exchanger (9), a hot well overflow tank (10), a continuous polymerization EG tank (11), a slurry mixing tank (12) and a vacuumizing unit (24). The invention has the advantages of recycling the spray EG and improving the utilization efficiency.
Description
Technical field
The present invention relates to a kind of spray EG circulation apparatus for controlling of supply 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 apparatus for controlling of supply improving the prepolymerization reaction still of utilization ratio is particularly important.
Summary of the invention
The object of the invention is to overcome above-mentioned deficiency, provide a kind of and spray EG is recycled, improve the spray EG circulation apparatus for controlling of supply of the prepolymerization reaction still of utilization ratio.
The object of the present invention is achieved like this:
A kind of spray EG circulation apparatus for controlling of supply 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, hot well overflow tank, continuous polymerization EG tank, slurry mix tank 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, wherein a bye-pass is also connected to the charging aperture of continuous polymerization EG tank top by other adapter roadside, other adapter road is provided with the first fluid level control valve, the discharging opening of plate type heat exchanger connects the charging aperture of pre-polymerization secondary spray equipment
The overfall of pre-polymerization preheater hypomere connects the charging aperture of hot well overflow tank by a pipeline,
Discharging opening bottom the discharging opening of the second discharging opening bottom pre-polymerization preheater, pre-polymerization screw rod transmission motor spindle and hot well overflow tank all connects a bye-pass, these three bye-passes are merged into the charging aperture that then a main pipe rail leads to continuous polymerization EG tank top, this main pipe rail also separates a bye-pass, this bye-pass connects thick EG tank
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 two bye-passes, wherein a bye-pass connects the charging aperture of continuous polymerization EG tank top, this bye-pass is provided with the second fluid level control valve, the charging aperture of an other 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
The discharging opening of continuous polymerization EG pot bottom and the overfall of continuous polymerization EG tank connect respectively by a bye-pass and merge into main pipe rail, this main pipe rail connects the charging aperture of slurry mix tank, this main pipe rail is also connected the refluxing opening of continuous polymerization EG tank by return line
In addition, pre-polymerization hot well is provided with pre-polymerization hot well fluid level transmitter,
Pre-polymerization preheater is provided with pre-polymerization preheater fluid level transmitter,
Pre-polymerization is cold is abovegroundly provided with the cold well fluid level transmitter of pre-polymerization,
Wherein, the signal transmission of pre-polymerization hot well fluid level transmitter and pre-polymerization preheater fluid level transmitter to HS, then passes to LIC, thus controls the aperture of the second fluid level control valve;
The signal transmission of the cold well fluid level transmitter of pre-polymerization to LIC, thus controls the aperture of the first fluid level control valve.
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 invention has the beneficial effects as follows:
The spray EG circulation apparatus for controlling of supply of prepolymerization reaction still of the present invention 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 apparatus for controlling of supply of prepolymerization reaction still of the present invention.
Fig. 2 is that the signal of pre-polymerization pressure transmitter and pre-polymerization flow control valve controls schematic diagram.
Fig. 3 is that the signal of pre-polymerization hot well fluid level transmitter, pre-polymerization preheater fluid level transmitter and the second fluid level control valve controls schematic diagram.
Fig. 4 is that the signal of the cold well fluid level transmitter of pre-polymerization and the first fluid level control valve controls schematic diagram.
Detailed description of the invention
See Fig. 1 ~ Fig. 4, the spray EG circulation apparatus for controlling of supply of a kind of prepolymerization reaction still that the present invention 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, hot well overflow tank 10, continuous polymerization EG tank 11, slurry mix tank 12 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, wherein a bye-pass is also connected to the charging aperture at continuous polymerization EG tank 11 top by other adapter roadside, other adapter road is provided with the first fluid level control valve, and the discharging opening of plate type heat exchanger 9 connects the charging aperture of pre-polymerization secondary spray equipment 3.
The overfall of pre-polymerization preheater 5 hypomere connects the charging aperture of hot well overflow tank 10 by a pipeline.
Discharging opening bottom the discharging opening of the second discharging opening bottom pre-polymerization preheater 5, pre-polymerization screw rod transmission motor spindle and hot well overflow tank 10 all connects a bye-pass, these three bye-passes are merged into the charging aperture that then a main pipe rail leads to continuous polymerization EG tank 11 top, this main pipe rail is provided with a delivery pump, this main pipe rail at delivery pump rear also separates a bye-pass, this bye-pass connects thick EG tank.
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 two bye-passes, wherein a bye-pass connects the charging aperture at continuous polymerization EG tank 11 top, this bye-pass is provided with the second fluid level control valve, the charging aperture at other 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.
The overfall of the discharging opening bottom continuous polymerization EG tank 11 and continuous polymerization EG tank 11 connects respectively by a bye-pass and merges into main pipe rail, this main pipe rail is provided with two delivery pumps in parallel, this main pipe rail at delivery pump rear connects the charging aperture of slurry mix tank 12, this main pipe rail at delivery pump rear is also connected the refluxing opening of continuous polymerization EG tank 11 by return line.
In addition, pre-polymerization hot well 4 is provided with pre-polymerization hot well fluid level transmitter,
Pre-polymerization preheater 5 is provided with pre-polymerization preheater fluid level transmitter,
The cold well of pre-polymerization 8 is provided with the cold well fluid level transmitter of pre-polymerization,
Wherein, the signal transmission of pre-polymerization hot well fluid level transmitter and pre-polymerization preheater fluid level transmitter is to HS(manually-operated gate), then pass to LIC(fluid level controller), thus control the aperture of the second fluid level control valve;
The signal transmission of the cold well fluid level transmitter of pre-polymerization to LIC, thus controls the aperture of the first fluid level control valve.
Claims (4)
1. the spray EG circulation apparatus for controlling of supply 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), hot well overflow tank (10), continuous polymerization EG tank (11), slurry mix tank (12) 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), wherein a bye-pass is also connected to the charging aperture at continuous polymerization EG tank (11) top by other adapter roadside, other adapter road is provided with the first fluid level control valve, the discharging opening of plate type heat exchanger (9) connects the charging aperture of pre-polymerization secondary spray equipment (3)
The overfall of pre-polymerization preheater (5) hypomere connects the charging aperture of hot well overflow tank (10) by a pipeline,
Discharging opening bottom second discharging opening of pre-polymerization preheater (5) bottom, the discharging opening of pre-polymerization screw rod transmission motor spindle and hot well overflow tank (10) all connects a bye-pass, these three bye-passes are merged into the charging aperture that then a main pipe rail leads to continuous polymerization EG tank (11) top, this main pipe rail also separates a bye-pass, this bye-pass connects thick EG tank
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 two bye-passes, wherein a bye-pass connects the charging aperture at continuous polymerization EG tank (11) top, this bye-pass is provided with the second fluid level control valve, the charging aperture at other 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
The discharging opening of continuous polymerization EG tank (11) bottom and the overfall of continuous polymerization EG tank (11) connect respectively by a bye-pass and merge into main pipe rail, this main pipe rail connects the charging aperture of slurry mix tank (12), this main pipe rail is also connected the refluxing opening of continuous polymerization EG tank (11) by return line
In addition, pre-polymerization hot well (4) is provided with pre-polymerization hot well fluid level transmitter,
Pre-polymerization preheater (5) is provided with pre-polymerization preheater fluid level transmitter,
The cold well of pre-polymerization (8) is provided with the cold well fluid level transmitter of pre-polymerization,
Wherein, the signal transmission of pre-polymerization hot well fluid level transmitter and pre-polymerization preheater fluid level transmitter to HS, then passes to LIC, thus controls the aperture of the second fluid level control valve;
The signal transmission of the cold well fluid level transmitter of pre-polymerization to LIC, thus controls the aperture of the first fluid level control valve.
2. the spray EG circulation apparatus for controlling of supply 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 apparatus for controlling of supply 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 apparatus for controlling of supply 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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| CN201510465524.2A CN105032331B (en) | 2015-08-03 | 2015-08-03 | The spray EG of prepolymerization reaction still circulates apparatus for controlling of supply |
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| CN201510465524.2A CN105032331B (en) | 2015-08-03 | 2015-08-03 | The spray EG of prepolymerization reaction still circulates apparatus for controlling of supply |
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| CN105032331B CN105032331B (en) | 2016-09-28 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105367773A (en) * | 2015-12-15 | 2016-03-02 | 新凤鸣集团湖州中石科技有限公司 | Polyester stable EG adding device |
| CN105820322A (en) * | 2016-05-18 | 2016-08-03 | 江苏兴业塑化股份有限公司 | Spray EG circular supply device for final polymerization tank |
| 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 |
| CN105820319A (en) * | 2016-05-18 | 2016-08-03 | 江苏兴业塑化股份有限公司 | Continuous polymerization process EG circulation control system |
| CN105837800A (en) * | 2016-05-18 | 2016-08-10 | 江苏兴业塑化股份有限公司 | Spraying EG circulation supply control device of final polymerization reaction kettle |
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| CN105367773A (en) * | 2015-12-15 | 2016-03-02 | 新凤鸣集团湖州中石科技有限公司 | Polyester stable EG adding device |
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Address after: 214423 No. 18, hailun Road, Zhouzhuang Town, Jiangyin City, Wuxi City, Jiangsu Province Patentee after: Jiangsu Sanfangxiang Film Co.,Ltd. Address before: 214423 No. 18, hailun Road, Zhouzhuang Town, Jiangyin City, Wuxi City, Jiangsu Province Patentee before: Jiangsu San Fang Lane Film Co.,Ltd. |
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