CN204932911U - A kind of continuous rectification apparatus for maleic anhydride production - Google Patents
A kind of continuous rectification apparatus for maleic anhydride production Download PDFInfo
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- CN204932911U CN204932911U CN201520668849.6U CN201520668849U CN204932911U CN 204932911 U CN204932911 U CN 204932911U CN 201520668849 U CN201520668849 U CN 201520668849U CN 204932911 U CN204932911 U CN 204932911U
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Abstract
The utility model discloses a kind of continuous rectification apparatus for maleic anhydride production, comprise thick acid anhydride tank and treating column, the top exit of thick acid anhydride tank is connected with evaporimeter, the top exit of evaporimeter is connected with the material inlet for the treatment of column, the tower top discharging opening for the treatment of column is connected with refining condenser and return tank, the outlet at bottom of return tank is connected with rectifying tower top material inlet mouth, the borrow outlet of rectifying column is connected with smart acid anhydride condenser and smart acid anhydride tank, the overfall for the treatment of column is connected with reboiler, and the outlet of reboiler is connected with charging aperture at the bottom of the tower of rectifying column by circulating pump at the bottom of tower.The utility model not only effectively raises the efficiency of conversion, the highest conversion ratio realizing crude maleic anhydride more than 90%, separating degree is high, purity is high, achieve the serialization in purification process, effectively raise production efficiency, and compact conformation, decrease the cost of investment of equipment, energy consumption is compared traditional refining plant and is reduced 12%, achieve good technique effect, be easy to apply.
Description
Technical field
The utility model belongs to chemical mechanical equipment technical field, is specifically related to a kind of continuous rectification apparatus for maleic anhydride production.
Background technology
Cis-butenedioic anhydride is a kind of important Organic Chemicals, obtains use widely in fields such as plastics industry, paper industry, synthetic resin industry, coatings industry, pesticide industry, medical industries.At present, the production of cis-butenedioic anhydride is for haul with benzene and air, catalyst is adopted to generate cis-butenedioic anhydride material gas through fixing oxidation bed oxidation, the cis-butenedioic anhydride material gas generated enters into sequence of constant boiling and rectification section and utilizes dehydrating agent to slough water in Free water and molecule after fractional distilling tube condensation, thick acid anhydride after dehydration is driven in continuous continuous rectification apparatus and carries out rectifying from thick acid anhydride tank, can obtain the cis-butenedioic anhydride of finished product.Now, carrying out in the refining process of thick acid anhydride, unreasonable due to what design and arrange, not only there is complex procedures, the cis-butenedioic anhydride product quality of producing is unstable, the extraction of crude maleic anhydride can not be realized very well, the effect of extractive distillation is undesirable, and in existing purification apparatus, crude maleic anhydride is directly joined in treating column, the steam passed into is utilized to heat, in order to improve the purity of purification, need to pass into a large amount of steam, that production cost is high on the one hand, the volume being treating column is on the other hand large, the top of tower and the temperature at middle part are lower than at the bottom of tower, make the thick acid anhydride of part directly can not be converted and drop at the bottom of tower, thus greatly reduce the efficiency of purification.Therefore, develop a kind of reasonable in design, easy and simple to handle, small investment, energy consumption are low, continuous treatment can be realized, effectively can improve conversion ratio, product purity is high and the continuous rectification apparatus for maleic anhydride production of stay in grade is desirability.
Summary of the invention
The purpose of this utility model is to provide a kind of reasonable in design, easy and simple to handle, small investment, energy consumption are low, can realize continuous treatment, effectively can improve conversion ratio, product purity is high and the continuous rectification apparatus for maleic anhydride production of stay in grade.
The purpose of this utility model realizes like this, comprise thick acid anhydride tank and treating column, treating column comprises tower top discharging opening, tower top charging aperture, discharging opening at the bottom of tower, charging aperture at the bottom of tower, material inlet and borrow outlet, the top exit of thick acid anhydride tank is connected with evaporimeter, the top exit of evaporimeter is connected with material inlet, tower top discharging opening is connected with refining condenser, the bottom of refining condenser is connected with return tank by flange components, the outlet at bottom of return tank is connected with tower top charging aperture with pipeline by reflux pump, borrow outlet is connected with smart acid anhydride condenser by pipeline, the outlet of essence acid anhydride condenser is connected with smart acid anhydride tank, the bottom for the treatment of column is provided with overfall, overfall is connected with reboiler by pipeline, the outlet of reboiler is connected with charging aperture at the bottom of tower by circulating pump at the bottom of tower.
The continuous rectification apparatus that the utility model provides, that collection material boils intensification again, material is carried and being heated up in a steamer, the novel distillation device of material rectifying and condensing reflux one, the design arrangement of this device is reasonable, not only effectively expand the space that gas-liquid contacts with each other, the internal circulating load of material in tower increases, the successful that rectifying is separated, and effectively avoid the generation of air-teturning mixed phenomenon of intermediate species, improve the efficiency of conversion, the highest conversion ratio realizing crude maleic anhydride more than 90%, separating degree is high, purity is high, the effective purification to crude maleic anhydride can be realized completely, heated up by the material of mutually connecting, material rectifying and condensing reflux achieve the serialization in purification process, effectively raise production efficiency, simultaneously, benzene utility model compact conformation, decrease the cost of investment of equipment, farthest improve the efficiency of separation, and under the requirement of same materials situation and cis-butenedioic anhydride product, energy consumption is compared traditional refining plant and is reduced 12%, achieve good technique effect, be easy to apply.
Accompanying drawing explanation
Fig. 1 is overall structure schematic diagram of the present utility model;
Fig. 2 is the structural representation for the treatment of column;
In figure: the thick acid anhydride tank of 1-, the thick acid anhydride pump of 2-, 3-flowmeter, 4-evaporimeter, 5-treating column, discharging opening at the bottom of 51-tower, the public stripping section of 52-, 53-material inlet, 54-feed side rectification zone, the public rectifying section of 55-, 56-tower top discharging opening, 57-tower top charging aperture, 58-demarcation strip, 59-borrow outlet rectification zone, 510-extraction side, 511-overfall, charging aperture at the bottom of 512-tower, 6-refines condenser, and 7-refluxes filling, 8-reflux pump, 9-essence acid anhydride condenser, 10-essence acid anhydride tank, 11-reboiler, circulating pump at the bottom of 12-tower.
Detailed description of the invention
Be further described the utility model below in conjunction with accompanying drawing, but limited the utility model never in any form, any change done based on the utility model training centre or improvement, all belong to protection domain of the present utility model.
As shown in Fig. 1 ~ 2, the utility model comprises thick acid anhydride tank 1 and treating column 5, treating column 5 comprises tower top discharging opening 56, tower top charging aperture 57, discharging opening 51 at the bottom of tower, charging aperture 512 at the bottom of tower, material inlet 53 and borrow outlet 59, the top exit of thick acid anhydride tank 1 is connected with evaporimeter 4, the top exit of evaporimeter 4 is connected with material inlet 53, tower top discharging opening 51 is connected with refining condenser 6, the bottom of refining condenser 6 is connected with return tank 7 by flange components, the outlet at bottom of return tank 7 is connected with tower top charging aperture 57 with pipeline by reflux pump 8, borrow outlet 59 is connected with smart acid anhydride condenser 9 by pipeline, the outlet of essence acid anhydride condenser 9 is connected with smart acid anhydride tank 10, the bottom of described treating column 5 is provided with overfall 511, overfall 511 is connected with reboiler 11 by pipeline, the outlet of reboiler 11 is connected with charging aperture at the bottom of tower 512 by circulating pump at the bottom of tower 12.
Further, described treating column 5 is partitioned column, public stripping section 52 is disposed with from top to bottom in the tower body for the treatment of column 5, conversion zone and public rectifying section 55, axis along tower body in described conversion zone is vertically installed with one piece of demarcation strip 58, reaction chamber in conversion zone is divided into independently feed side rectification zone 54 and rectification zone, extraction side 510 by demarcation strip 58, described material inlet 53 is arranged on the tower body of feed side rectification zone 54, described borrow outlet 59 is arranged on the tower body of rectification zone, extraction side 510, being arranged to partitioned column is in order to the gas-liquid load entered in tower body can be made to be tending towards even, further to improve the efficiency of rectifying, improve the speed transformed, avoid the generation of side reaction.
Further, the outlet at bottom of described return tank 7 is connected with thick acid anhydride tank 1 by circulation line, being amount in order to effectively control phegma when the material of return tank 7 to exceed in liquid level in limited time, can getting back to thick acid anhydride tank 1 carry out secondary rectifying by circulation line.
Further, the pipeline that described thick acid anhydride tank 1 is connected with evaporimeter 4 is provided with thick acid anhydride pump 2 and flowmeter 3, be in order to can be in good time control treating column 5 in inlet amount, to ensure good rectification effect.
In order to the purity of separation further can be improved, find through practice, preferably, the tower body of described feed side rectification zone 54 is provided with 2 material inlets 53, the height of described conversion zone is not less than 1/3 for the treatment of column 5 tower height, and the cross-sectional area of described feed side rectification zone 54 accounts for 1/2 ~ 3/4 of conversion zone cross-sectional area.
The course of work of the present utility model is: the thick acid anhydride in thick acid anhydride tank 1 directly squeezes into evaporimeter 4 by thick acid anhydride pump 2, control evaporimeter 4 pressure about-80KPa, and control steam flow, keep evaporimeter 4 temperature about 130 ~ 140 DEG C, cis-butenedioic anhydride gas phase after evaporation enters treating column 5 from material inlet 53, cis-butenedioic anhydride product after rectifying is discharged from borrow outlet 59 after the condensation of smart acid anhydride condenser 9, is entered into the storage of smart acid anhydride tank 10, tower top light component enters reflux in tower by reflux pump 8 from tower top charging aperture 57 after refining condenser 6 and return tank 7, the light component of unnecessary extraction is got back to thick acid anhydride tank 1 and is carried out rectifying again, and heavy constituent at the bottom of tower enters after reboiler 11 heats by overfall 511, circulating pump 12 at the bottom of tower is utilized to squeeze into tower reactor forced circulation heating heavy constituent from charging aperture 51 at the bottom of tower.
Claims (7)
1. the continuous rectification apparatus for maleic anhydride production, it is characterized in that: comprise thick acid anhydride tank (1) and treating column (5), treating column (5) comprises tower top discharging opening (56), tower top charging aperture (57), discharging opening at the bottom of tower (51), charging aperture at the bottom of tower (512), material inlet (53) and borrow outlet (59), the top exit of thick acid anhydride tank (1) is connected with evaporimeter (4), the top exit of evaporimeter (4) is connected with material inlet (53), tower top discharging opening (51) is connected with refining condenser (6), the bottom of refining condenser (6) is connected with return tank (7) by flange components, the outlet at bottom of return tank (7) is connected with tower top charging aperture (57) with pipeline by reflux pump (8), borrow outlet (59) is connected with smart acid anhydride condenser (9) by pipeline, the outlet of essence acid anhydride condenser (9) is connected with smart acid anhydride tank (10), the bottom for the treatment of column (5) is provided with overfall (511), overfall (511) is connected with reboiler (11) by pipeline, the outlet of reboiler (11) is connected with charging aperture at the bottom of tower (512) by circulating pump at the bottom of tower (12).
2. a kind of continuous rectification apparatus for maleic anhydride production according to claim 1, it is characterized in that: described treating column (5) is partitioned column, public stripping section (52) is disposed with from top to bottom in the tower body for the treatment of column (5), conversion zone and public rectifying section (55), axis along tower body in conversion zone is vertically installed with one piece of demarcation strip (58), reaction chamber in conversion zone is divided into independently feed side rectification zone (54) and rectification zone, extraction side (510) by demarcation strip (58), material inlet (53) is arranged on the tower body of feed side rectification zone (54), borrow outlet (59) is arranged on the tower body of rectification zone, extraction side (510).
3. a kind of continuous rectification apparatus for maleic anhydride production according to claim 1, is characterized in that: the outlet at bottom of described return tank (7) is connected with thick acid anhydride tank (1) by circulation line.
4. a kind of continuous rectification apparatus for maleic anhydride production according to claim 1, is characterized in that: the pipeline that described thick acid anhydride tank (1) is connected with evaporimeter (4) is provided with thick acid anhydride pump (2) and flowmeter (3).
5. a kind of continuous rectification apparatus for maleic anhydride production according to claim 2, is characterized in that: the tower body of described feed side rectification zone (54) is provided with 2 material inlets (53).
6. a kind of continuous rectification apparatus for maleic anhydride production according to claim 2, is characterized in that: the height of described conversion zone is not less than 1/3 for the treatment of column (5) tower height.
7. a kind of continuous rectification apparatus for maleic anhydride production according to claim 2, is characterized in that: the cross-sectional area of described feed side rectification zone (54) accounts for 1/2 ~ 3/4 of conversion zone cross-sectional area.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520668849.6U CN204932911U (en) | 2015-09-01 | 2015-09-01 | A kind of continuous rectification apparatus for maleic anhydride production |
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| CN201520668849.6U CN204932911U (en) | 2015-09-01 | 2015-09-01 | A kind of continuous rectification apparatus for maleic anhydride production |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105605643A (en) * | 2016-03-04 | 2016-05-25 | 珠海格力电器股份有限公司 | Air outlet structure and range hood with same |
| CN109761940A (en) * | 2019-03-18 | 2019-05-17 | 淄博齐翔腾达化工股份有限公司 | Crude maleic anhydride continuous rectification apparatus and process |
| CN110124357A (en) * | 2019-05-13 | 2019-08-16 | 江苏九九久科技有限公司 | Volatile impurity removes easy device in fluid |
| CN111018813A (en) * | 2018-10-09 | 2020-04-17 | 中国石油化工股份有限公司 | Double-tower continuous rectification device and method for maleic anhydride refining process |
| CN111349064A (en) * | 2020-03-04 | 2020-06-30 | 北京泽华化学工程有限公司 | Process for rectifying and separating crude phthalic anhydride mixture by using dividing wall tower |
| CN111732563A (en) * | 2020-05-19 | 2020-10-02 | 惠州宇新新材料有限公司 | Process method for batch rectification of crude maleic anhydride |
| CN112354205A (en) * | 2020-11-02 | 2021-02-12 | 雅邦绿色过程与新材料研究院南京有限公司 | Multifunctional rectification experimental system for comprehensive utilization of waste organic solvent resources |
| CN115463618A (en) * | 2022-08-08 | 2022-12-13 | 北京鑫缘化工有限公司 | Reactor for preparing maleic anhydride by oxidizing n-butane |
-
2015
- 2015-09-01 CN CN201520668849.6U patent/CN204932911U/en active Active
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105605643A (en) * | 2016-03-04 | 2016-05-25 | 珠海格力电器股份有限公司 | Air outlet structure and range hood with same |
| CN111018813A (en) * | 2018-10-09 | 2020-04-17 | 中国石油化工股份有限公司 | Double-tower continuous rectification device and method for maleic anhydride refining process |
| CN111018813B (en) * | 2018-10-09 | 2021-11-30 | 中国石油化工股份有限公司 | Double-tower continuous rectification device and method for maleic anhydride refining process |
| CN109761940A (en) * | 2019-03-18 | 2019-05-17 | 淄博齐翔腾达化工股份有限公司 | Crude maleic anhydride continuous rectification apparatus and process |
| CN109761940B (en) * | 2019-03-18 | 2024-03-26 | 淄博齐翔腾达化工股份有限公司 | Continuous rectifying device and process method for crude maleic anhydride |
| CN110124357A (en) * | 2019-05-13 | 2019-08-16 | 江苏九九久科技有限公司 | Volatile impurity removes easy device in fluid |
| CN111349064A (en) * | 2020-03-04 | 2020-06-30 | 北京泽华化学工程有限公司 | Process for rectifying and separating crude phthalic anhydride mixture by using dividing wall tower |
| CN111732563A (en) * | 2020-05-19 | 2020-10-02 | 惠州宇新新材料有限公司 | Process method for batch rectification of crude maleic anhydride |
| CN112354205A (en) * | 2020-11-02 | 2021-02-12 | 雅邦绿色过程与新材料研究院南京有限公司 | Multifunctional rectification experimental system for comprehensive utilization of waste organic solvent resources |
| CN115463618A (en) * | 2022-08-08 | 2022-12-13 | 北京鑫缘化工有限公司 | Reactor for preparing maleic anhydride by oxidizing n-butane |
| CN115463618B (en) * | 2022-08-08 | 2023-11-10 | 北京鑫缘化工有限公司 | Reactor for preparing maleic anhydride by oxidizing n-butane |
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