CN103599741B - A kind of Esterification separation tower and manufacture method thereof - Google Patents
A kind of Esterification separation tower and manufacture method thereof Download PDFInfo
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- CN103599741B CN103599741B CN201310566012.6A CN201310566012A CN103599741B CN 103599741 B CN103599741 B CN 103599741B CN 201310566012 A CN201310566012 A CN 201310566012A CN 103599741 B CN103599741 B CN 103599741B
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Abstract
The present invention relates to the technical field of chemical industry equipment and method, specifically, relate to a kind of Esterification separation tower and manufacture method thereof.Described first liquid level gauge is installed on tower body; described return duct is arranged at tower body lower end; it also comprises bypass duct, front protective valve, rear protective valve, the second liquid level gauge and compensation arrangement; described bypass duct is connected with return duct; described front protective valve, the second liquid level gauge and rear protective valve are installed on bypass duct successively, and described compensation arrangement is connected with the second liquid level gauge.Even if the first liquid level gauge has damaged when process units continuous operating time is longer or has broken down, cannot use, on-line maintenance or parking maintenance is not needed yet, the second liquid level gauge for subsequent use can be adopted to carry out liquid level sampling, send data to central controller with this to the capacity of returns of the liquid level and ethylene glycol that control the ethylene glycol at the bottom of Esterification separation tower tower, and then the content of ethylene glycol in minimizing esterification waste water, reduce production cost, improve productivity effect.
Description
Technical field:
The present invention relates to the technical field of chemical industry equipment and method, specifically, relate to a kind of Esterification separation tower and manufacture method thereof.
Background technology:
Domestic chemical fibre industry is overall, and the situation is tense, how to improve the quality of production and the performance of enterprises and become the problem being badly in need of solving, many and the complex process of production of polyester link raw material in fused mass directly spinning process, how optimized production process, the waste reduced in production process is that we reduce production cost, improves the main point of penetration of productivity effect.According to the statistics of analysis data, find that the ethylene glycol content of one of raw materials for production in the esterification waste water produced in the esterification process of workshop is in more than 0.4% always, higher compared with other workshops, calculate by current production rate, monthly esterification water has 90 tons, then on average waste ethylene glycol about 13.77 tons, therefore in order to reduce costs, the ethylene glycol content reduced in esterification water is current main expugnable direction, and ethylene glycol liquid level at the bottom of Esterification separation tower tower is an important referential data in control procedure, ethylene glycol capacity of returns can be controlled according to the ethylene glycol liquid level at the bottom of Esterification separation tower tower, therefore namely problem changes into and how to measure ethylene glycol liquid level at the bottom of Esterification separation tower tower, in prior art, a liquid level gauge is installed at the bottom of Esterification separation tower tower, but in actual production process, because process units continuous operating time is longer, liquid level gauge often breaks down, can not use, there is larger difficulty in on-line maintenance, parking maintenance can lose again too large, also unrealistic.
Summary of the invention:
The technical problem to be solved in the present invention is, even if provide a kind of liquid level gauge fault, still can monitor Esterification separation tower and the manufacture method thereof of ethylene glycol liquid level at the bottom of Esterification separation tower tower.
For solving the problems of the technologies described above; the present invention adopts so a kind of Esterification separation tower; it comprises tower body, the first liquid level gauge and return duct; described first liquid level gauge is installed on tower body; described return duct is arranged at tower body lower end, and it also comprises bypass duct, front protective valve, rear protective valve, the second liquid level gauge and compensation arrangement, and described bypass duct is connected with return duct; described front protective valve, the second liquid level gauge and rear protective valve are installed on bypass duct successively, and described compensation arrangement is connected with the second liquid level gauge.
The present invention is compared with Esterification separation tower of the prior art, have the following advantages: even if the first liquid level gauge has damaged when process units continuous operating time is longer or has broken down, cannot use, on-line maintenance or parking maintenance is not needed yet, the second liquid level gauge for subsequent use can be adopted to carry out liquid level sampling, send data to central controller with this to the capacity of returns of the liquid level and ethylene glycol that control the ethylene glycol at the bottom of Esterification separation tower tower, and then the content of ethylene glycol in minimizing esterification waste water, reduce production cost, improve productivity effect.
As preferably, described compensation arrangement comprises rubber tube and container bottle, described container bottle is inverted and is arranged, described rubber tube one end is connected with container bottle, and the other end is connected with the second liquid level gauge, and described first liquid level gauge and the second liquid level gauge exist liquid level difference, affect the accuracy of measurement data, therefore compensation arrangement is set, Liquid level compensator is carried out to the second liquid level gauge, make test data more react authenticity.
As preferably another, be provided with the material-feeding port for compensating at the bottom of described container bottle bottle, along with time lengthening, the ethylene glycol in compensation arrangement can reduce, in order to keep ethylene glycol liquid level and stoste position in compensation arrangement to be in same level, being therefore provided with material-feeding port and being convenient to regularly compensate ethylene glycol.
As preferably another, described first liquid level gauge and the second liquid level count identical model and size, and data are more accurate, more truly.
For solving the problems of the technologies described above, the present invention adopts a kind of like this manufacture method of Esterification separation tower, and it comprises the following steps: (1) manufactures tower body and return duct; (2) the first liquid level gauge is installed; (3) perforate on return duct, welds a bypass duct in corresponding position, hole; (4) front protective valve and rear protective valve are installed in bypass duct; (5) close front protective valve and rear protective valve, between front protective valve and rear protective valve, cut a mounting interface by the mode of gas cutting, docking port carries out cooling and clearing up polishing; (6) the second liquid level gauge is installed on the mounting interface in step 5, utilizes electric welding to seal mounting interface; (7) make ethylene glycol with compensation arrangement to the second liquid level gauge to compensate, the ethylene glycol liquid level of the ethylene glycol liquid level in compensation arrangement and the first liquid level gauge is maintained an equal level; (8) protective valve before opening, makes ethylene glycol at the bottom of tower enter the second liquid level gauge, starts to measure.
The present invention, compared with the manufacture method of Esterification separation tower of the prior art, has the following advantages: technique is simple, and cost is lower, and the detection data of Esterification separation tower to ethylene glycol at the bottom of tower of manufacture are accurately true.
As preferably, after step 6, also comprise step of leaking hunting, the mounting interface after step 6 is leaked hunting, if leaked, then repeat step 6, if do not leaked, then carry out step 7, avoid leaking the accuracy causing test data, more insure.
Accompanying drawing illustrates:
Fig. 1 is the structural representation of a kind of Esterification separation tower of the present invention;
Shown in figure: 1, tower body, the 2, first liquid level gauge, 3, return duct, 4, bypass duct, 5, front protective valve, 6, rear protective valve, the 7, second liquid level gauge, 8, rubber tube, 9, container bottle.
Detailed description of the invention:
Below in conjunction with specific embodiment, the invention will be further described.
As shown in Figure 1, a kind of Esterification separation tower of the present invention, it comprises tower body 1, first liquid level gauge 2 and return duct 3, described first liquid level gauge 2 is installed on tower body 1, described return duct 3 is arranged at tower body 1 lower end, it also comprises bypass duct 4, front protective valve 5, rear protective valve 6, second liquid level gauge 7 and compensation arrangement, described bypass duct 4 is connected with return duct 3, described front protective valve 5, second liquid level gauge 7 and rear protective valve 6 are installed on bypass duct 4 successively, described compensation arrangement is connected with the second liquid level gauge 7, wherein, described compensation arrangement comprises rubber tube 8 and container bottle 9, described container bottle 9 is inverted and is arranged, described rubber tube 8 one end is connected with container bottle 9, the other end is connected with the second liquid level gauge 7, certainly, it is one of them embodiment of the present invention that described container bottle 9 and rubber tube 8 combine as compensation arrangement, other embodiments can also be had, such as, the jug of available same size and plastic tube replace container bottle 9 and rubber tube 8 to combine.Be provided with the material-feeding port for compensating at the bottom of described container bottle 9 bottles, described material-feeding port is also provided with for capping rotatable lid and enter funnel, described in enter funnel and can hang with on volumetric flask, need the used time, material-feeding port inserted in its one end.Described first liquid level gauge 2 is identical model and size with the second liquid level gauge 7.
The manufacture method of a kind of Esterification separation tower of the present invention, it comprises the following steps: (1) manufactures tower body and return duct; (2) the first liquid level gauge is installed; (3) perforate on return duct, welds a bypass duct in corresponding position, hole; (4) front protective valve and rear protective valve are installed in bypass duct; (5) close front protective valve and rear protective valve, between front protective valve and rear protective valve, cut a mounting interface by the mode of gas cutting, docking port carries out cooling and clearing up polishing; (6) the second liquid level gauge is installed on the mounting interface in step 5, utilizes electric welding to seal mounting interface; (7) make ethylene glycol with compensation arrangement to the second liquid level gauge to compensate, the ethylene glycol liquid level of the ethylene glycol liquid level in compensation arrangement and the first liquid level gauge is maintained an equal level; (8) protective valve before opening, makes ethylene glycol at the bottom of tower enter the second liquid level gauge, starts to measure.After step 6, also comprise step of leaking hunting, the mounting interface after step 6 is leaked hunting, if leaked, then repeat step 6, if do not leaked, then carry out step 7.
In practice, analytic process of the present invention is: in order to accurately measure ethylene glycol liquid level at the bottom of tower, be convenient to production process monitoring data, reduce ethylene glycol content in esterification water, improve productivity effect, first, analyze ethylene glycol content in esterification water relevant with which factor, to technological parameter through changing the method for variable test one by one, to sum up in esterification water the main and knockout tower pressure on top surface of ethylene glycol content, tower middle portion temperature, esterification water temperature, ethylene glycol capacity of returns at the bottom of tower (by ethylene glycol Liquid level at the bottom of tower) is relevant.But the reason such as can not to keep in repair because the first liquid level gauge damages, thus ethylene glycol return duct at the bottom of knockout tower is reinstalled second liquid level gauge come measurement data be sent in control display, thus realize controlling liquid level and ethylene glycol capacity of returns is stablized.Such as, in actual test process, there are data as follows at present: ethylene glycol liquid level: 1218mm at the bottom of tower, ethylene glycol capacity of returns: 3.2-3.5m3/h, tower top pressure: 66-70kPa, tower middle portion temperature: 117.2 DEG C, esterification water temperature: 85-88 DEG C, after second liquid level gauge installs, through technologist and middle control personnel repeatedly to parameter modification and tracing control, and the field observation of knockout tower visor is found that at the bottom of tower, ethylene glycol liquid level can be stabilized in claimed range, backflow ethylene glycol amount also tends to be steady, at the end of brainstorm project, in esterification water, ethylene glycol content has dropped to 0.2% by former more than 0.4%, cut the waste the economic benefit brought: by ethylene glycol per ton 7000 yuan calculating, annual approximately escapable cost: 365 days × 90 tons × 0.2% × 7000 yuan=450,000 yuan, greatly reduce cost, improve the productivity effect of enterprise.
Claims (6)
1. an Esterification separation tower; it comprises tower body, the first liquid level gauge and return duct; described first liquid level gauge is installed on tower body; described return duct is arranged at tower body lower end; it is characterized in that, it also comprises bypass duct, front protective valve, rear protective valve, the second liquid level gauge and compensation arrangement, and described bypass duct is connected with return duct; described front protective valve, the second liquid level gauge and rear protective valve are installed on bypass duct successively, and described compensation arrangement is connected with the second liquid level gauge.
2. a kind of Esterification separation tower according to claim 1, is characterized in that, described compensation arrangement comprises rubber tube and container bottle, and described container bottle is inverted and is arranged, and described rubber tube one end is connected with container bottle, and the other end is connected with the second liquid level gauge.
3. a kind of Esterification separation tower according to claim 2, is characterized in that, is provided with the material-feeding port for compensating at the bottom of described container bottle bottle.
4. a kind of Esterification separation tower according to claim 1, is characterized in that, described first liquid level gauge and the second liquid level count identical model and size.
5. a manufacture method for Esterification separation tower, is characterized in that, it comprises the following steps: (1) manufactures tower body and return duct; (2) the first liquid level gauge is installed; (3) perforate on return duct, welds a bypass duct in corresponding position, hole; (4) front protective valve and rear protective valve are installed in bypass duct; (5) close front protective valve and rear protective valve, between front protective valve and rear protective valve, cut a mounting interface by the mode of gas cutting, docking port carries out cooling and clearing up polishing; (6) the second liquid level gauge is installed on the mounting interface in step 5, utilizes electric welding to seal mounting interface; (7) make ethylene glycol with compensation arrangement to the second liquid level gauge to compensate, the ethylene glycol liquid level of the ethylene glycol liquid level in compensation arrangement and the first liquid level gauge is maintained an equal level; (8) protective valve before opening, makes ethylene glycol at the bottom of tower enter the second liquid level gauge, starts to measure.
6. the manufacture method of a kind of Esterification separation tower according to claim 5, is characterized in that, after step 6, also comprise step of leaking hunting, and leaks hunting to the mounting interface after step 6, if leaked, then repeats step 6, if do not leaked, then carry out step 7.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310566012.6A CN103599741B (en) | 2013-11-14 | 2013-11-14 | A kind of Esterification separation tower and manufacture method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310566012.6A CN103599741B (en) | 2013-11-14 | 2013-11-14 | A kind of Esterification separation tower and manufacture method thereof |
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| Publication Number | Publication Date |
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| CN103599741A CN103599741A (en) | 2014-02-26 |
| CN103599741B true CN103599741B (en) | 2015-09-23 |
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| CN110356732A (en) * | 2019-07-04 | 2019-10-22 | 昌和化学新材料(江苏）有限公司 | A kind of surge tank of diisooctyl phenyl phosphite production |
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| JPS61155923A (en) * | 1984-12-28 | 1986-07-15 | Toa Nenryo Kogyo Kk | Method for measuring boundary surface of tower tanks |
| CN202654744U (en) * | 2012-07-03 | 2013-01-09 | 宿州中粮生物化学有限公司 | Alcohol two-tower distilling device |
| CN203220771U (en) * | 2013-03-07 | 2013-10-02 | 江西景德半导体新材料有限公司 | Rectifying tower solid impurity discharge system |
| CN103342807B (en) * | 2013-07-10 | 2015-04-22 | 浙江万凯新材料有限公司 | Stable structure of polyester process tower |
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