CN211158645U - Trimellitic anhydride rectification reboiler multiple-effect energy-saving device - Google Patents
Trimellitic anhydride rectification reboiler multiple-effect energy-saving device Download PDFInfo
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- CN211158645U CN211158645U CN201921641342.6U CN201921641342U CN211158645U CN 211158645 U CN211158645 U CN 211158645U CN 201921641342 U CN201921641342 U CN 201921641342U CN 211158645 U CN211158645 U CN 211158645U
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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
- Y02P20/10—Process efficiency
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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
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Abstract
The utility model relates to a trimellitic anhydride rectification reboiler multiple-effect economizer, including rectifying column, hot-water pump, generator, condenser, vacuum pump, first smart tower and first smart tower cauldron. The utility model has the advantages that: the utility model discloses trimellitic anhydride rectifying reboiler multiple-effect economizer abandons the conduction oil cooling system that original trimellitic anhydride rectifying condenser adopted, changes into hot water circulative cooling to the by-product steam is used for the first rectifying tower of low boiling substance desorption, and sets for the first rectifying tower cauldron process temperature scope of control through exhaust pressure, has realized having reduced energy resource consumption simultaneously to trimellitic anhydride rectified control, has reduced manufacturing cost.
Description
Technical Field
The utility model belongs to energy-conserving production field relates to an energy-conserving reboiler device, in particular to trimellitic anhydride rectification reboiler multiple-effect economizer.
Background
Trimellitic anhydride is an important raw material in organic synthesis industry, and can be used for producing various high-performance chemicals, such as plasticizer trioctyl trimellitate, insulating special paint, coating and the like. At present, during the production process of trimellitic anhydride, a liquid-phase air oxidation method is mostly adopted, trimellitic acid is generated through reaction at the temperature of more than 200 ℃ and under the pressure of 2.2MPa, then crude trimellitic anhydride is obtained through continuous batch dehydration, and finally, a finished product is obtained through refining. The exchange refrigerant adopted by the condensation of the high-boiling-point substances in the trimellitic anhydride rectifying tower is heat conduction oil, and an independent cooling oil pump system is used for circulation, so that the energy consumption is high, and the utilization rate of heat absorbed by the heat conduction oil is low. The control range of the liquid phase reflux ratio of the product at the top of the rectification tower is limited.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a trimellitic anhydride rectification reboiler multiple-effect economizer that can improve heat utilization rate.
In order to solve the technical problem, the utility model adopts the technical scheme that: a trimellitic anhydride rectification reboiler multiple-effect energy-saving device has the innovation points that: comprises a rectifying tower, a hot water pump, a generator, a condenser, a vacuum pump, a primary rectifying tower and a primary rectifying tower kettle,
a liquid phase discharge pipeline and a feed pipeline which are communicated with the rectifying tower are sequentially arranged at one side part of the rectifying tower from top to bottom, and the other end of the liquid phase discharge pipeline is communicated with the center of the bottom end of the condenser; a gas-phase feeding pipeline communicated with the rectifying tower is arranged in the center of the top end of the rectifying tower, and the other end of the gas-phase feeding pipeline is communicated with the side part of the lower end of the condenser;
the top end of the condenser is respectively provided with a steam discharge pipeline A communicated with the generator and a hot water feeding pipeline communicated with the hot water pump, and the generator and the hot water pump are communicated through a circulating water pipeline;
the generator and the primary fine tower are communicated through a steam discharge pipeline B, and the primary fine tower kettle is serially arranged on the steam discharge pipeline B; the primary rectifying tower and the primary rectifying tower kettle are communicated through a liquid discharging pipeline.
Furthermore, the condenser is internally provided with a U-shaped heat exchange coil for condensation and a baffle for guiding the rectified high-temperature steam to fully contact and exchange with the condensation coil.
The utility model has the advantages that:
(1) the utility model discloses trimellitic anhydride reboiler multiple-effect economizer abandons the conduction oil cooling system that original trimellitic anhydride rectification condenser adopted, changes into hot water circulative cooling to the by-product steam is used for the primary rectifying tower of low boiling point substance desorption, and sets for control primary rectifying tower cauldron process temperature scope through exhaust pressure, has realized the control to trimellitic anhydride rectification, has reduced energy resource consumption simultaneously, has reduced manufacturing cost;
trimellitic anhydride, a heat-sensitive substance, has a large influence on the heat exchange performance of the condenser, so that a heat exchange medium needs to have a certain temperature control range; when the device works, the heat exchange medium inlet pipe and the heat exchange medium outlet pipe of the tube pass of the tower top condenser are respectively connected with the hot water pump and the generator, the hot steam of a product discharged from the top of the rectifying tower enters one side of the shell pass of the condenser, then the hot steam is condensed into liquid along the gas phase channel designed on the shell pass under the condition of negative pressure, namely the gap of the heat exchange pipe, the gas phase exchanges heat with the heat exchange pipe and then is condensed into liquid, the hot water in the pipe is heated to generate steam, larger circulation amount is not needed, and the heat utilization rate is greatly improved;
(2) the utility model discloses trimellitic anhydride rectification reboiler multiple-effect economizer, wherein, the inside of condenser is the U type heat exchange coil pipe that the condensation was used, and inside is equipped with the baffle, can guide rectification high temperature steam and condensation coil pipe fully to contact the exchange heat, makes the gaseous phase condensation be the liquid phase.
Drawings
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
FIG. 1 is a schematic structural diagram of the multi-effect energy-saving device of the trimellitic anhydride rectification reboiler of the present invention.
Detailed Description
The following examples are presented to enable those skilled in the art to more fully understand the present invention and are not intended to limit the scope of the present invention.
Examples
The multi-effect energy-saving device of the trimellitic anhydride rectifying reboiler in the embodiment comprises a rectifying tower 1, a hot water pump 2, a generator 3, a condenser 4, a vacuum pump 5, a primary rectifying tower 6 and a primary rectifying tower kettle 7 as shown in fig. 1.
A liquid phase discharge pipeline and a feed pipeline which are communicated with the rectifying tower 1 are sequentially arranged at one side part of the rectifying tower 1 from top to bottom, and the other end of the liquid phase discharge pipeline is communicated with the center of the bottom end of the condenser 4; the top center of rectifying column 1 is equipped with the gaseous phase charge-in pipeline with rectifying column 1 intercommunication, and the other end of gaseous phase charge-in pipeline and the lower extreme lateral part intercommunication setting of condenser 4.
A gas phase discharge pipeline communicated with the condenser 4 is arranged on the other side part of the lower end of the condenser 4, and the other end of the gas phase discharge pipeline is communicated with a vacuum pump 5; the top of condenser 4 is equipped with the steam ejection of compact pipeline A who communicates with generator 3 and the hot water charge-in pipeline with hot-water pump 2 intercommunication respectively, and still sets up through circulating water pipeline intercommunication between generator 3 and the hot-water pump 2.
The generator 3 and the primary fine tower 6 are communicated through a steam discharge pipeline B, and the primary fine tower kettle 7 is arranged on the steam discharge pipeline B in series; the primary rectifying tower 6 and the primary rectifying tower kettle 7 are communicated through a liquid discharge pipeline.
As an embodiment, the condenser 4 is internally provided with a U-shaped heat exchange coil for condensation, and a baffle plate is arranged inside the U-shaped heat exchange coil, so that the rectification high-temperature steam can be guided to fully contact with the condensation coil to exchange heat, and the gas phase is condensed into the liquid phase.
Example of operation
Firstly operating a vacuum pump 5 to pull a rectifying tower 1 to a high vacuum state, establishing hot water circulation by a condenser 4 and a hot water pump 2, setting the outlet steam pressure of a generator 3 to be 1.3MPa, starting external steam to preheat a hot water system of the condenser 4 and the generator 3, introducing crude trimellitic anhydride into the bottom of the rectifying tower 1 when the trimellitic anhydride rectifying tower 1 works, evaporating product steam to enter a tower top condenser 4 through the rectifying tower 1, cooling the product steam on the upper part of the tower by the condenser 4 by using pump circulation hot water as a heat exchange medium, raising the outlet hot water to about 200 ℃ due to heat exchange to generate steam, entering the generator 3, then entering a primary rectifying tower kettle 7 through an adjusting valve to serve as a heating source of the primary rectifying tower 6.
The basic principles and main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (2)
1. A trimellitic anhydride rectification reboiler multiple-effect energy-saving device is characterized in that: comprises a rectifying tower, a hot water pump, a generator, a condenser, a vacuum pump, a primary rectifying tower and a primary rectifying tower kettle,
a liquid phase discharge pipeline and a feed pipeline which are communicated with the rectifying tower are sequentially arranged at one side part of the rectifying tower from top to bottom, and the other end of the liquid phase discharge pipeline is communicated with the center of the bottom end of the condenser; a gas-phase feeding pipeline communicated with the rectifying tower is arranged in the center of the top end of the rectifying tower, and the other end of the gas-phase feeding pipeline is communicated with the side part of the lower end of the condenser;
a gas phase discharge pipeline communicated with the condenser is arranged on the other side part of the lower end of the condenser, and the other end of the gas phase discharge pipeline is communicated with a vacuum pump; the top end of the condenser is respectively provided with a steam discharge pipeline A communicated with the generator and a hot water feeding pipeline communicated with the hot water pump, and the generator and the hot water pump are communicated through a circulating water pipeline;
the generator and the primary fine tower are communicated through a steam discharge pipeline B, and the primary fine tower kettle is serially arranged on the steam discharge pipeline B; the primary rectifying tower and the primary rectifying tower kettle are communicated through a liquid discharging pipeline.
2. The multiple-effect energy-saving device for the trimellitic anhydride rectification reboiler according to claim 1, characterized in that: the condenser is internally provided with a U-shaped heat exchange coil for condensation and a baffle for guiding the rectification high-temperature steam to fully contact and exchange with the condensation coil.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921641342.6U CN211158645U (en) | 2019-09-29 | 2019-09-29 | Trimellitic anhydride rectification reboiler multiple-effect energy-saving device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921641342.6U CN211158645U (en) | 2019-09-29 | 2019-09-29 | Trimellitic anhydride rectification reboiler multiple-effect energy-saving device |
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| Publication Number | Publication Date |
|---|---|
| CN211158645U true CN211158645U (en) | 2020-08-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921641342.6U Active CN211158645U (en) | 2019-09-29 | 2019-09-29 | Trimellitic anhydride rectification reboiler multiple-effect energy-saving device |
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| Country | Link |
|---|---|
| CN (1) | CN211158645U (en) |
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2019
- 2019-09-29 CN CN201921641342.6U patent/CN211158645U/en active Active
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