CN217139251U - Dealcoholization tower system in butyl acrylate preparation - Google Patents
Dealcoholization tower system in butyl acrylate preparation Download PDFInfo
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- CN217139251U CN217139251U CN202220865376.9U CN202220865376U CN217139251U CN 217139251 U CN217139251 U CN 217139251U CN 202220865376 U CN202220865376 U CN 202220865376U CN 217139251 U CN217139251 U CN 217139251U
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- dealcoholization tower
- butyl acrylate
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/50—Improvements relating to the production of bulk chemicals
- Y02P20/584—Recycling of catalysts
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Abstract
The utility model relates to a dealcoholize tower system in butyl acrylate preparation belongs to butyl acrylate's preparation technical field. The dealcoholization tower system in the preparation of the butyl acrylate comprises a dealcoholization tower, wherein a preheater is connected with the dealcoholization tower, the dealcoholization tower is connected with a first-stage condenser, the first-stage condenser is connected with a second-stage condenser, and the second-stage condenser is connected with a recovery tank of a dehydration tower; the primary condenser is connected with a recovery tank of the dealcoholization tower, and the recovery tank of the dealcoholization tower is connected with the upper part of the dealcoholization tower through a reflux pump; the bottom of the dealcoholization tower is divided into two paths, and one path is connected with the refining tower through a production pump; the other path is connected with a reboiler through a circulating pump, and the reboiler is connected with the middle part of the dealcoholization tower. The utility model provides a dealcoholize tower system in butyl acrylate preparation, dealcoholize effectually, energy saving and consumption reduction has alleviateed the degree of material polymerization.
Description
Technical Field
The utility model relates to a dealcoholize tower system in butyl acrylate preparation belongs to butyl acrylate's preparation technical field.
Background
The reaction of butanol and acrylic acid to generate butyl acrylate is a typical reversible reaction, even under certain conditions, the conversion rate of acrylic acid can reach more than 98.5 percent, the product butyl acrylate still contains excessive butanol, unreacted acrylic acid and catalyst p-toluenesulfonic acid which is not recovered completely, and the butanol is recycled by an alcohol recovery device; the product contains unreacted acrylic acid and unrecovered p-toluenesulfonic acid, and if the unreacted acrylic acid and the unrecovered p-toluenesulfonic acid are not removed, the quality and the purity of the product are directly influenced, so that the product is unqualified. Excessive alcohol, catalyst p-toluenesulfonic acid and unreacted acrylic acid contained in the product are subjected to alcohol recovery, catalyst extraction and alkali washing in the previous stage, most impurities in the product are removed, but the product still contains a small amount of alcohol and other byproducts which are difficult to remove, the purity and yield of the product are influenced, the product is unqualified, and the benefit is low.
SUMMERY OF THE UTILITY MODEL
The utility model aims to overcome the above-mentioned defect that prior art exists, provide a dealcoholize tower system in the preparation of butyl acrylate, dealcoholize effectually, energy saving and consumption reduction has alleviateed the degree of material polymerization.
The dealcoholization tower system in butyl acrylate preparation comprises a dealcoholization tower, wherein a preheater is connected with the dealcoholization tower, the dealcoholization tower is connected with a first-stage condenser, the first-stage condenser is connected with a second-stage condenser, and the second-stage condenser is connected with a recovery tank of the dewatering tower; the primary condenser is connected with a recovery tank of the dealcoholization tower, and the recovery tank of the dealcoholization tower is connected with the upper part of the dealcoholization tower through a reflux pump; the recovery tank of the dehydration tower is connected with the secondary condenser; the bottom of the dealcoholization tower is divided into two paths, and one path is connected with the refining tower through a production pump; the other path is connected with a reboiler through a circulating pump, and the reboiler is connected with the middle part of the dealcoholization tower; the extraction pump is a tower bottom extraction pump of the dealcoholization tower and sends the rectified product to the refining tower; the circulating pump is a circulating pump at the bottom of the dealcoholization tower and is used for heating and continuously circulating the materials in the dealcoholization tower; the reflux pump is a reflux pump at the top of the dealcoholization tower, and the reflux pump takes alcohol as reflux to the top of the dealcoholization tower to cool the top of the dealcoholization tower; the liquid condensed out in the first stage is put into a recovery tank of a dealcoholization tower. The reboiler heats the materials in the dealcoholization tower.
Preferably, a crude butyl ester feeding pipe is arranged on the preheater; the preheater is a feeding preheater of the dealcoholization tower and preheats butyl ester entering the dealcoholization tower.
Preferably, a plurality of layers of trays are arranged in the dealcoholization tower.
Preferably, the primary condenser is connected with a circulating water pipe; the second-stage condenser is connected with a freezing water pipe. The first-stage condenser condenses steam evaporated from the top of the dealcoholization tower by using circulating water; condensing the steam which is not condensed by the secondary condenser by using chilled water;
preferably, the secondary condenser is connected with the waste gas treatment unit through a steam jet pump and a tail gas fan.
Preferably, the dealcoholization tower recovery tank is connected to the waste liquid recovery tank.
The utility model discloses a dealcoholize tower system in butyl acrylate preparation utilizes the boiling point difference of butanol and butyl acrylate, under dealcoholize tower's effect, through a small amount of alcohol in the rectified mode desorption product to the alcohol content in making the product is in the specified range, butanol's boiling point 117 ℃, butyl acrylate's boiling point 145.7 ℃.
When the device works, crude butyl ester in the buffer tank enters a feeding preheater of a dealcoholization tower through a crude butyl ester feeding pipe and then enters the dealcoholization tower, the preheater is heated by 0.25MPa steam, the preheated crude butyl ester enters the dealcoholization tower from a 21 st tower plate in the dealcoholization tower, enters a reboiler for heating and circulating through a circulating pump at the bottom of the dealcoholization tower, water, butanol and butyl ester are subjected to azeotropic distillation from the top of the dealcoholization tower through reduced pressure distillation, the water, the butanol and the butyl ester enter a primary condenser at the top of the dealcoholization tower and are condensed by circulating water, condensed liquid enters a recovery tank of the dealcoholization tower, uncondensed gas enters a secondary condenser and is condensed by freezing water, the condensed liquid enters a recovery tank of the dehydration tower, and the uncondensed gas is sent to a waste gas treatment unit through a steam jet pump and a tail gas fan.
Demixing the condensate of the recovery tank of the dealcoholization tower, and feeding part of the supernatant into the tower from a reflux pump at the top of the dealcoholization tower to control the temperature at the top of the tower; the other part of the butanol is reused as the raw material together with the raw material butanol; the lower layer liquid enters the waste liquid recovery tank from a water phase area below the layered interface at the bottom of the recovery tank of the dealcoholization tower.
Discharging the tower bottom liquid of the dealcoholization tower from the tower bottom, and returning a part of the tower bottom liquid to the tower bottom after entering a reboiler at the tower bottom of the dealcoholization tower and being heated by 0.25MPa steam; the other part of the tower bottom liquid is delivered to the refining tower from the tower bottom by a pump extracted from the tower bottom of the dealcoholization tower.
The utility model has the advantages that:
(1) the dealcoholization tower system in butyl acrylate preparation of the utility model is provided with a first-stage condenser and a second-stage condenser, and removes a small amount of alcohol in the product in a rectification mode, so that the alcohol content in the product is in a specified range, and meanwhile, the negative pressure environment reduces the boiling point of the material, reduces the energy consumption and saves the cost;
(2) the dealcoholization tower system in the butyl acrylate preparation of the utility model is provided with a circulating pump, a dealcoholization tower recovery tank and a dealcoholization tower, thereby forming a negative pressure environment and reducing the temperature required by heating materials, thereby lightening the polymerization of the materials and improving the purity;
(3) dealcoholization tower system in the butyl acrylate preparation, easy operation, the practicality is strong.
Drawings
FIG. 1 is a schematic diagram of a dealcoholization column system in the production of butyl acrylate according to the present invention;
in the figure: 1. a preheater; 2. a crude butyl ester feed pipe; 3. a dealcoholization tower; 4. a first-stage condenser; 5. a steam jet pump; 6. a secondary condenser; 7. a circulating water pipe; 8. a tail gas fan; 9. an exhaust gas treatment unit; 10. a dehydration tower recovery tank; 11. a dealcoholization tower recovery tank; 12. a waste liquid recovery tank; 13. a reflux pump; 14. a reboiler; 15. a circulation pump; 16. a production pump; 17. a refining tower; 18. a column plate; 19. a freezing water pipe.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
As shown in fig. 1, the dealcoholization tower system in butyl acrylate preparation of the present invention comprises a dealcoholization tower 3, a preheater 1 connected to the dealcoholization tower 3, a dealcoholization tower 3 connected to a first-stage condenser 4, the first-stage condenser 4 connected to a second-stage condenser 6, the second-stage condenser 6 connected to a dewatering tower recovery tank 10; the primary condenser 4 is connected with a dealcoholization tower recovery tank 11, and the dealcoholization tower recovery tank 11 is connected with the upper part of the dealcoholization tower 3 through a reflux pump 13; the dealcoholization tower recovery tank 11 is connected with the secondary condenser 6; the bottom of the dealcoholization tower 3 is divided into two paths, one path is connected with a refining tower 17 through a production pump 16; the other path is connected with a reboiler 14 through a circulating pump 15, and the reboiler 14 is connected with the middle part of the dealcoholization tower 3.
The extraction pump 16 is a tower bottom extraction pump of the dealcoholization tower and sends the rectified product to the refining tower; the circulating pump 15 is a circulating pump at the bottom of the dealcoholization tower and is used for heating and continuously circulating the materials in the dealcoholization tower; the reflux pump 13 is a reflux pump at the top of the dealcoholization tower, and takes alcohol as reflux to the top of the dealcoholization tower to cool the top of the dealcoholization tower; the recovery tank 11 is a dealcoholization tower recovery tank, and the liquid condensed from the first stage is put into the dealcoholization tower recovery tank.
Reboiler 14 heats the contents of the dealcoholization column.
A crude butyl ester feeding pipe 2 is arranged on the preheater 1; the preheater 1 is a feeding preheater of the dealcoholization tower and preheats butyl ester entering the dealcoholization tower.
A plurality of layers of tower plates 18 are arranged in the dealcoholization tower 3.
The primary condenser 4 is connected with a circulating water pipe 7; the secondary condenser 6 is connected with a chilled water pipe 19. The first-stage condenser 4 condenses the steam evaporated from the top of the dealcoholization tower by circulating water; the steam which is not condensed by the secondary condenser 6 is condensed by chilled water;
the secondary condenser 6 is connected with a waste gas treatment unit 9 through a steam jet pump 5 and a tail gas fan 8.
The dealcoholization column tank 11 is connected to a waste liquid recovery tank 12.
The utility model discloses a dealcoholize tower system in butyl acrylate preparation utilizes the boiling point difference of butanol and butyl acrylate, under dealcoholize tower's effect, through a small amount of alcohol in the rectified mode desorption product to the alcohol content in making the product is in the specified range, butanol's boiling point 117 ℃, butyl acrylate's boiling point 145.7 ℃.
When the device works, crude butyl ester in the buffer tank enters a feeding preheater of a dealcoholization tower through a crude butyl alcohol feeding pipe 2 and then enters the dealcoholization tower, the preheater is heated by 0.25MPa steam, the preheated crude butyl ester enters the dealcoholization tower from a 21 st tower plate in the dealcoholization tower, enters a reboiler 14 for heating circulation through a bottom circulating pump 15 of the dealcoholization tower, water, butanol and butyl ester are subjected to azeotropic distillation from the top of the dealcoholization tower through reduced pressure distillation, the water, the butanol and the butyl ester enter a primary condenser 4 and a secondary condenser 6 at the top of the dealcoholization tower and are condensed by cooling water, condensed liquid enters a recovery tank 11 of the dealcoholization tower, uncondensed gas enters a secondary condenser and is condensed by cooling water, the condensed liquid enters a recovery tank 10 of the dehydration tower, and non-condensed gas is sent to a waste gas treatment unit through a steam jet pump and a tail gas fan.
Layering the condensate of the recovery tank 11 of the dealcoholization tower, and feeding part of the supernatant into the tower from a reflux pump at the top of the dealcoholization tower to control the temperature at the top of the tower; the other part of the butanol is reused as the raw material together with the raw material butanol; the lower layer liquid enters a waste liquid recovery tank 12 from a lower water phase zone below the bottom layer interface of the dealcoholization tower recovery tank 11.
The tower bottom liquid of the dealcoholization tower is discharged from the tower bottom, and a part of the tower bottom liquid enters a reboiler 14 at the tower bottom of the dealcoholization tower and is heated by 0.25MPa steam and then returns to the tower bottom; the other part of the tower bottom liquid is conveyed by a bottom extraction pump 16 of the dealcoholization tower and enters the refining tower from the bottom.
Of course, the above description is only a preferred embodiment of the present invention, and should not be taken as limiting the scope of the embodiments of the present invention. The present invention is not limited to the above examples, and the technical field of the present invention is equivalent to the changes and improvements made in the actual range of the present invention, which should be attributed to the patent coverage of the present invention.
Claims (6)
1. A dealcoholization tower system in butyl acrylate preparation, which is characterized in that: the system comprises a dealcoholization tower (3), a preheater (1) is connected with the dealcoholization tower (3), the dealcoholization tower (3) is connected with a primary condenser (4), the primary condenser (4) is connected with a secondary condenser (6), and the secondary condenser (6) is connected with a dehydration tower recovery tank (10); the primary condenser (4) is connected with a dealcoholization tower recovery tank (11), and the dealcoholization tower recovery tank (11) is connected with the upper part of the dealcoholization tower (3) through a reflux pump (13); the dehydration tower recovery tank (10) is connected with the secondary condenser (6); the bottom of the dealcoholization tower (3) is divided into two paths, and one path is connected with a refining tower (17) through a production pump (16); the other path is connected with a reboiler (14) through a circulating pump (15), and the reboiler (14) is connected with the middle part of the dealcoholization tower (3).
2. The dealcoholization column system in the production of butyl acrylate according to claim 1, wherein: the preheater (1) is provided with a coarse butyl ester feeding pipe (2).
3. The dealcoholization column system for butyl acrylate production according to claim 1, wherein: a plurality of layers of tower plates (18) are arranged in the dealcoholization tower (3).
4. The dealcoholization column system in the production of butyl acrylate according to claim 1, wherein: the primary condenser (4) is connected with a circulating water pipe (7); the secondary condenser (6) is connected with a freezing water pipe (19).
5. The dealcoholization column system in the production of butyl acrylate according to claim 1, wherein: the secondary condenser (6) is connected with the waste gas treatment unit (9) through a steam jet pump (5) and a tail gas fan (8).
6. The dealcoholization column system in the production of butyl acrylate according to claim 1, wherein: the dealcoholization tower recovery tank (11) is connected with the waste liquid recovery tank (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220865376.9U CN217139251U (en) | 2022-04-14 | 2022-04-14 | Dealcoholization tower system in butyl acrylate preparation |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220865376.9U CN217139251U (en) | 2022-04-14 | 2022-04-14 | Dealcoholization tower system in butyl acrylate preparation |
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| CN217139251U true CN217139251U (en) | 2022-08-09 |
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| CN202220865376.9U Active CN217139251U (en) | 2022-04-14 | 2022-04-14 | Dealcoholization tower system in butyl acrylate preparation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116036626A (en) * | 2022-11-22 | 2023-05-02 | 安徽海华科技集团有限公司 | Quick high-efficient dewatering system of reaction raw materials |
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2022
- 2022-04-14 CN CN202220865376.9U patent/CN217139251U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116036626A (en) * | 2022-11-22 | 2023-05-02 | 安徽海华科技集团有限公司 | Quick high-efficient dewatering system of reaction raw materials |
| CN116036626B (en) * | 2022-11-22 | 2023-09-29 | 安徽海华科技集团有限公司 | Quick high-efficient dewatering system of reaction raw materials |
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