CN103342807B - Stable structure of polyester process tower - Google Patents
Stable structure of polyester process tower Download PDFInfo
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- CN103342807B CN103342807B CN201310288028.5A CN201310288028A CN103342807B CN 103342807 B CN103342807 B CN 103342807B CN 201310288028 A CN201310288028 A CN 201310288028A CN 103342807 B CN103342807 B CN 103342807B
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- ethylene glycol
- receiving tank
- low spot
- accident
- valve
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Abstract
The invention discloses a stable structure of a polyester process tower. The structure comprises an accident glycol collecting tank, a glycol low-point collecting tank and an output pump, wherein the accident glycol collecting tank is arranged at high level and the liquid outlet end of the accident glycol collecting tank is connected with the glycol low-point collecting tank through an output pipe; the glycol low-point collecting tank is arranged at low level and the output end of the glycol low-point collecting tank is communicated with a process tower pipeline through the output pump. The structure is characterized in that a liquid level meter is arranged in the glycol low-point collecting tank; the output pipe is provided with a first valve linked with the liquid level meter; a return pipe is arranged between the liquid outlet of the glycol low-point collecting tank and a liquid inlet end of the accident glycol collecting tank; the return pipe is provided with a second valve linked with the liquid level meter. Compared with the prior art, the stable structure of the polyester process tower has the advantages that a circular loop capable of automatically supplementing is formed between the glycol accident collecting tank and the glycol low-point collecting tank to guarantee the stable flow of the glycol sending to the process tower and guarantee the stable operation of the process tower.
Description
Technical field
The present invention relates to the structure that a kind of ethylene glycol is transported to process tower, belong to technical field in production of polyester.
Background technology
Fig. 1 is that the process tower structure that in existing production of polyester, ethylene glycol is collected comprises accident ethylene glycol receiving tank 1a, ethylene glycol low spot receiving tank 2a and Send out pump 5a, wherein, accident ethylene glycol receiving tank 1a is in the high-order gas phase emission thing for collecting when reactor safety valve opens jumping, ethylene glycol low spot receiving tank 2a is in low level for collecting the ethylene glycol discharged in polyester device, the outlet end of accident ethylene glycol receiving tank 1a is connected with ethylene glycol low spot receiving tank 2a, and ethylene glycol low spot receiving tank 2a output terminal leads to process tower pipeline by a Send out pump 5a.
Because ethylene glycol amount in ethylene glycol low spot receiving tank changes the ethylene glycol flow that ethylene glycol low spot receiving tank can be caused to be sent to process tower in above-mentioned prior art, because ethylene glycol temperature in process tower is usually high than the temperature in ethylene glycol low spot receiving tank more than 200 DEG C,, so the flow of ethylene glycol directly has influence on the stability of process tower.For this reason, need the flow being transported to process tower of the adjustment ethylene glycol that very important person is at set intervals, thus affect working efficiency.
Summary of the invention
Technical problem to be solved by this invention provides a kind of ethylene glycol work output can stablize polyester process tower rock steady structure within the specific limits.
The present invention solves the problems of the technologies described above adopted technical scheme: a kind of polyester process tower rock steady structure, comprise accident ethylene glycol receiving tank, ethylene glycol low spot receiving tank and Send out pump, aforementioned accident ethylene glycol receiving tank is in high-order also outlet end and is connected by an output tube with ethylene glycol low spot receiving tank, aforesaid ethylene glycol low spot receiving tank is in low level and output terminal leads to process tower pipeline by Send out pump, it is characterized in that
Be provided with liquidometer in described ethylene glycol low spot receiving tank, this liquidometer has high-order check point and low level check point;
Described output tube is provided with first valve chain with aforementioned liquidometer;
Be provided with a return line between the liquid outlet of described ethylene glycol low spot receiving tank and the liquid feeding end of accident ethylene glycol receiving tank, this return line is provided with second valve chain with aforementioned liquidometer.
Further, the bottom of described ethylene glycol low spot receiving tank is provided with slag discharging device.
Further, described Send out pump is twin pump, and this twin pump comprises the first pump and the second pump that connect side by side.During the maintenance of one of them pump, another one pump can normally work, and ensures on-line operation.
A kind of polyester process tower rock steady structure, comprise accident ethylene glycol receiving tank, ethylene glycol low spot receiving tank and Send out pump, aforementioned accident ethylene glycol receiving tank is in high-order also outlet end and is connected by an output tube with ethylene glycol low spot receiving tank, aforesaid ethylene glycol low spot receiving tank is in low level and output terminal leads to process tower pipeline by Send out pump, it is characterized in that
In described ethylene glycol low spot receiving tank, the first liquid level be provided with for detecting low level is taken into account for detecting the second high-order liquidometer;
Described output tube is provided with first valve chain with aforementioned first liquidometer;
Be provided with a return line between the liquid outlet of described ethylene glycol low spot receiving tank and the liquid feeding end of accident ethylene glycol receiving tank, this return line is provided with second valve chain with aforementioned second liquidometer.
Compared with prior art, the invention has the advantages that: form a circulation loop automatically supplemented at ethylene glycol accident receiving tank and ethylene glycol low spot receiving tank, ensure the ethylene glycol stability of flow being sent to process tower, guarantee the steady running of process tower; Largely Shangdi solves the reuse ethylene glycol instability of flow because entering process tower, causes process tower to fluctuate, affects the problem of whole production and quality product.One-piece construction is simple and practical, install and convenient to operation, there is the advantage that safety coefficient is high.
Accompanying drawing explanation
Fig. 1 is that in prior art, in production of polyester, ethylene glycol receiving tank removes process tower structural representation.
Fig. 2 is embodiment 1 structural representation.
Fig. 3 is embodiment 2 structural representation.
Embodiment
Below in conjunction with accompanying drawing embodiment, the present invention is described in further detail.
Embodiment 1, as shown in Figure 2, polyester process tower rock steady structure in the present embodiment comprises accident ethylene glycol receiving tank 1, ethylene glycol low spot receiving tank 2 and Send out pump, accident ethylene glycol receiving tank 1 is in high-order also outlet end and is connected by output tube 8 with ethylene glycol low spot receiving tank 2, ethylene glycol low spot receiving tank 2 is in low level and output terminal leads to process tower pipeline by Send out pump, the pipeline of process tower is gone to be provided with under meter 6, be provided with liquidometer 4 in ethylene glycol low spot receiving tank 2, this liquidometer 4 has high-order check point and low level check point; Output tube 8 is provided with common valve 11 and first valve 31 chain with liquidometer; Be provided with a return line 7 between the liquid outlet of ethylene glycol low spot receiving tank 2 and the liquid feeding end of accident ethylene glycol receiving tank 1, this return line 7 is provided with second valve 32 chain with liquidometer 4.
The bottom of ethylene glycol low spot receiving tank 2 is provided with slag discharging device (without display in figure).The first valve 31 in the present embodiment and the second valve 32 all can adopt pneumavalve; Send out pump is twin pump, and this twin pump comprises the first pump 51 and the second pump 52 connected side by side.
When ethylene glycol low spot receiving tank 2 liquid level exceedes setting high-order, automatically open the second valve 32, its unnecessary ethylene glycol is delivered in accident ethylene glycol receiving tank 1 temporary, when liquid level is lower than setting high-order, automatically close the second valve 32; When ethylene glycol low spot receiving tank liquid level is in the low level of setting, automatically opening the first valve 31 transfers to ethylene glycol low spot receiving tank 2 by ethylene glycol in accident ethylene glycol receiving tank 1, until liquid level higher than setting high-order time, automatic closedown first valve 31, this design can need not adjust ethylene glycol low spot receiving tank for a long time and be sent to process tower ethylene glycol flow, ensure that the stable of process tower temperature, and then ensure that the steady running of process tower.
Embodiment 2, as shown in Figure 3, in the ethylene glycol low spot receiving tank in the present embodiment, the first liquid level be provided with for detecting low level is taken into account for detecting the second high-order liquidometer; Output tube is provided with first valve chain with the first liquidometer; Return line is provided with second valve chain with the second liquidometer.Other structures and principle of work reference example 1.
Claims (4)
1. a polyester process tower rock steady structure, comprise accident ethylene glycol receiving tank, ethylene glycol low spot receiving tank and Send out pump, aforementioned accident ethylene glycol receiving tank is in high-order also outlet end and is connected by an output tube with ethylene glycol low spot receiving tank, aforesaid ethylene glycol low spot receiving tank is in low level and output terminal leads to process tower pipeline by Send out pump, it is characterized in that
Be provided with liquidometer in described ethylene glycol low spot receiving tank, this liquidometer has high-order check point and low level check point;
Described output tube is provided with first valve chain with aforementioned liquidometer;
Be provided with a return line between the liquid outlet of described ethylene glycol low spot receiving tank and the liquid feeding end of accident ethylene glycol receiving tank, this return line is provided with second valve chain with aforementioned liquidometer;
When ethylene glycol low spot receiving tank liquid level exceedes setting high-order, automatically open the second valve, its unnecessary ethylene glycol is delivered in accident ethylene glycol receiving tank temporary, when liquid level is lower than setting high-order, automatically close the second valve; When ethylene glycol low spot receiving tank liquid level is in the low level of setting, automatically opens the first valve and ethylene glycol in accident ethylene glycol receiving tank is transferred to ethylene glycol low spot receiving tank, when liquid level is higher than setting high-order, automatically close the first valve.
2. polyester process tower rock steady structure according to claim 1, is characterized in that the bottom of described ethylene glycol low spot receiving tank is provided with slag discharging device.
3. polyester process tower rock steady structure according to claim 1, is characterized in that described Send out pump is twin pump, and this twin pump comprises the first pump and the second pump that connect side by side.
4. a polyester process tower rock steady structure, comprise accident ethylene glycol receiving tank, ethylene glycol low spot receiving tank and Send out pump, aforementioned accident ethylene glycol receiving tank is in high-order also outlet end and is connected by an output tube with ethylene glycol low spot receiving tank, aforesaid ethylene glycol low spot receiving tank is in low level and output terminal leads to process tower pipeline by Send out pump, it is characterized in that
In described ethylene glycol low spot receiving tank, the first liquid level be provided with for detecting low level is taken into account for detecting the second high-order liquidometer;
Described output tube is provided with first valve chain with aforementioned first liquidometer;
Be provided with a return line between the liquid outlet of described ethylene glycol low spot receiving tank and the liquid feeding end of accident ethylene glycol receiving tank, this return line is provided with second valve chain with aforementioned second liquidometer;
When ethylene glycol low spot receiving tank liquid level exceedes setting high-order, automatically open the second valve, its unnecessary ethylene glycol is delivered in accident ethylene glycol receiving tank temporary, when liquid level is lower than setting high-order, automatically close the second valve; When ethylene glycol low spot receiving tank liquid level is in the low level of setting, automatically opens the first valve and ethylene glycol in accident ethylene glycol receiving tank is transferred to ethylene glycol low spot receiving tank, when liquid level is higher than setting high-order, automatically close the first valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310288028.5A CN103342807B (en) | 2013-07-10 | 2013-07-10 | Stable structure of polyester process tower |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310288028.5A CN103342807B (en) | 2013-07-10 | 2013-07-10 | Stable structure of polyester process tower |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103342807A CN103342807A (en) | 2013-10-09 |
| CN103342807B true CN103342807B (en) | 2015-04-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310288028.5A Active CN103342807B (en) | 2013-07-10 | 2013-07-10 | Stable structure of polyester process tower |
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| CN (1) | CN103342807B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103599741B (en) * | 2013-11-14 | 2015-09-23 | 桐昆集团浙江恒盛化纤有限公司 | A kind of Esterification separation tower and manufacture method thereof |
| 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 |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102432846B (en) * | 2011-11-17 | 2013-12-04 | 华东理工大学 | Method and device for producing polyester polyol continuously |
| CN102775589B (en) * | 2012-08-17 | 2014-06-25 | 江苏长乐纤维科技有限公司 | Polyester process tower system |
| CN202993646U (en) * | 2012-09-29 | 2013-06-12 | 浙江恒逸高新材料有限公司 | Heat-reacting recycling and reusing system of polyester device |
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2013
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| CN103342807A (en) | 2013-10-09 |
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Address after: 314415 Zhejiang province Haining city Jianshan District Road No. 15 Wen Patentee after: Wankai new materials Co., Ltd Address before: 314415 Zhejiang province Haining city Jianshan District Road No. 15 Wen Patentee before: ZHEJIANG WANKAI NEW MATERIALS Co.,Ltd. |
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