Reaction azeotropic dehydration integrated device for esterification production of VB6
By designing a reaction azeotropic dehydration combined device in VB6 esterification production, combining azeotropic distillation and azeotropic water belt pretreatment, the high water content caused by the azeotropic water separation device is solved, the reaction rate is improved and energy is reduced This results in a more efficient esterification reaction.
Patent Information
- Application Number
- CN202420240028.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-30
- Publication Date
- 2024-12-24
- Estimated Expiration
- 2034-01-30
AI Technical Summary
In the prior art, the azeotropic water separation device leads to a high water content of the reaction material during the VB6 esterification production process, affecting the esterification reaction rate, extending the reaction time, increasing energy consumption, and lacking the effectiveness of azeotropic water-belt agent. deal with.
A combined reaction azeotropic dehydration device for VB6 esterification production is designed, including a reaction still kettle, distillation tower, condenser and partition structure. By pretreatment with azeotropic distillation and azeotropic water-belt agent, the entry into the reaction essence is reduced. The water content of the water-carrying agent in the still kettle increases the reaction rate and reduces energy consumption.
A low moisture content azeotropic water-belt agent is realized to enter the reaction still kettle, which increases the esterification reaction rate, shortens the reaction time, reduces energy consumption, and reduces the investment in reaction equipment.
Smart Images
Figure CN222218634U_ABST
Abstract
Description
Technical Field
[0001] The present application belongs to the technical field of oil-water separation, and in particular, relates to a reaction azeotropic dehydration combined device for VB6 esterification production. Background Art
[0002] The device of azeotropic water separation is an essential equipment in the VB6 esterification production process. The effect of azeotropic water separation will seriously affect the reaction rate of esterification and the degree of final reaction. If the effect of azeotropic water separation is poor, the water content of the water separation backflow to the tower kettle will be high, which will affect the rate of esterification reaction, and then the time of reaction will be prolonged, which will increase the energy consumption in the production process, and the reaction time will be prolonged, resulting in the consequence of low production capacity of workshop production. At present, in the actual production process, the reaction materials in the tower kettle are mixed with the azeotropic water-carrying agent without water, and the gas phase material is generated as the temperature in the tower kettle continues to rise. The gas phase material enters the condenser after the rectification or distillation equipment, and phase separation is carried out through the oil-water separator, and the oil phase is sent to the rectification or distillation equipment to achieve the purpose of phase separation. For example, in the patent with the authorization announcement number of CN 206392054U and the patent name of the continuous dehydration device of the molecular sieve for organic acid esterification reaction, only the esterification material is recovered. In the patent with the authorization announcement number CN 205495037U and the patent name of a fully automatic oil-water separation device for esterification reaction, the oil phase is also recovered and reused after phase separation, but both involve the problem of dealing with the lack of azeotropic water-carrying agent in the tower kettle after part of the azeotropic water-carrying agent is consumed during the esterification reaction. Therefore, it is necessary to make improvements. Summary of the invention
[0003] The present application provides a combined reaction azeotropic dehydration device for VB6 esterification production, which solves the problems of high water content of the azeotropic water-carrying agent entering the reactor, increased energy consumption, slow azeotropic dehydration efficiency, slow reaction, prolonged reaction time and limited production capacity.
[0004] The embodiment of the present application provides a combined reactive azeotropic dehydration device for VB6 esterification production, comprising a reactive distillation kettle and a distillation tower, wherein the reactive distillation kettle is located on one side of the distillation tower, and the top outlet of the reactive distillation kettle is connected to the main feed port of the distillation tower to form a side feed; the distillation tower is provided with an azeotropic water-carrying agent feed port, and the azeotropic water-carrying agent feed port is used to fill the distillation tower with the azeotropic water-carrying agent; the distillation tower is also provided with a steam inlet, and the steam inlet is connected to a tower bottom reboiler;
[0005] The steam inlet is located below the azeotropic water-carrying agent feed port, and the azeotropic water-carrying agent feed port is located below the main feed port.
[0006] In one embodiment, the distillation tower includes a stripping section located at the bottom and a rectifying section located at the top; wherein the main feed inlet and the azeotropic water-carrying agent feed inlet are located between the stripping section and the rectifying section, and the steam inlet is located below the stripping section.
[0007] In one embodiment, it further includes a condenser, and at least one condenser is provided.
[0008] In one embodiment, two condensers are provided, and the two condensers are arranged in series.
[0009] In one embodiment, a first partition is provided in the distillation tower and between the azeotropic water-carrying agent feed port and the main feed port, and a plurality of first through holes are provided on the first partition.
[0010] In one embodiment, the first partition is placed horizontally.
[0011] In one embodiment, the first partition is placed obliquely.
[0012] In one embodiment, a first partition and a second partition are provided in the distillation tower and between the azeotropic water-carrying agent feed port and the main feed port, and the second partition is located below the first partition;
[0013] The first partition plate is provided with a plurality of first through holes, and the second partition plate is provided with a plurality of second through holes; the first through holes and the second through holes are arranged alternately in the vertical direction.
[0014] In one embodiment, the first partition plate and the second partition plate are both placed horizontally.
[0015] In one embodiment, the first partition plate and the second partition plate are both placed at an angle.
[0016] The present application provides a combined reaction azeotropic dehydration device for VB6 esterification production, which combines azeotropic distillation with azeotropic water-carrying agent pretreatment. Compared with the traditional method, the water content of the water-carrying agent entering the reaction distillation kettle is low, the reaction rate is increased, the reaction time is reduced, the reaction energy consumption is reduced, and the corresponding reaction equipment investment is reduced. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.
[0018] Figure 1This is a schematic diagram of the structure of the azeotropic dehydration combined device for VB6 esterification production in this application;
[0019] Figure 2 for Figure 1 Enlarged view of M in the figure.
[0020] Explanation of symbols in the figure:
[0021] 1-reaction distillation kettle; 2-tower bottom reboiler; 3-stripping section; 4-azeotropic water-carrying agent feed port; 5-distillation section; 6-water separator; 7-condenser; 8-subcooler; 91-first partition; 911-first through hole; 92-second partition; 921-second through hole; 10-steam inlet; 11-main feed port; 12-oil phase material inlet. DETAILED DESCRIPTION
[0022] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.
[0023] The combined reaction and azeotropic dehydration device for VB6 esterification production provided in the embodiment of the present application is now described. Figure 1 The combined reactive azeotropic dehydration device for VB6 esterification production comprises a reactive distillation kettle 1, a distillation tower and a condenser 7. The reactive distillation kettle 1 is located on one side of the distillation tower, and the top outlet of the reactive distillation kettle 1 is connected to the main feed inlet 11 of the distillation tower to form a side feed.
[0024] The distillation tower is connected to the water separator 6 via the condenser 7, and the water separator 6 is connected to the distillation tower via the oil phase material inlet 12 arranged on the distillation tower. The distillation tower is provided with an azeotropic water-carrying agent feed port 4, and the azeotropic water-carrying agent feed port 4 is used to fill the distillation tower with the azeotropic water-carrying agent.
[0025] The distillation tower is also provided with a steam inlet 10 , which is connected to the tower bottom reboiler 2 . The steam inlet 10 is located below the azeotropic water-carrying agent feed port 4 , and the azeotropic water-carrying agent feed port 4 is located below the main feed port 11 .
[0026] Further, the distillation tower includes a stripping section 3 located at the bottom and a distillation section 5 located at the top, and a subcooler 8 is located above the distillation section 5. The main feed port 11 and the azeotropic water-carrying agent feed port 4 are located between the stripping section 3 and the distillation section 5, and the steam inlet 10 is located below the stripping section 3. The oil phase material inlet 12 is located between the distillation section 5 and the subcooler 8.
[0027] During production and application, the reacted materials are added to the reaction distillation kettle 1 in the figure 1, water is generated during the esterification reaction, and the azeotropic water-carrying agent enters from the azeotropic water-carrying agent feed port 4. After being treated by the distillation section 3 of the distillation tower, the water in the azeotropic water-carrying agent and the water in the reflux phase are removed, and the water-carrying agent entering the reaction distillation kettle 1 becomes a water-free and efficient water-carrying agent. Compared with the incoming water in the prior art, the water-carrying agent entering the reaction distillation kettle 1 has a low water content, which can promote the esterification reaction to proceed in the forward direction; the upper end of the distillation tower is the distillation section 5, which is mainly used for distillation azeotropic dehydration treatment. In order to obtain a gas phase with a high water content, a subcooler 8 is arranged at the top of the distillation tower, and a condenser 7 is arranged outside the tower to ensure that a high concentration of water can be enriched in the gas phase composition; after the gas phase passes through the condenser 7, it is separated into phases and the water is removed by the water separator 6 to complete the reaction water separation.
[0028] See also Figure 1 , is a combined reaction and azeotropic dehydration device for VB6 esterification production provided by an embodiment of the present application. For the sake of convenience, only the parts related to this embodiment are shown, which are described in detail as follows: At least one condenser 7 is provided. Preferably, two condensers are provided, and the two condensers 7 are provided in series. Two condensers are provided to perform primary condensation and secondary condensation, which is more conducive to improving the phase separation effect.
[0029] See also Figure 2 In one embodiment, a first partition plate 91 is provided in the distillation tower and between the azeotropic water-carrying agent feed port 4 and the main feed port 11, and a plurality of first through holes 911 are provided on the first partition plate 91. The first partition plate 91 is placed horizontally or tilted. The recovered oil phase material can be dispersed faster through the first partition plate 91, which is beneficial to gas-liquid exchange and improves the oil-water separation in the stripping section 3.
[0030] See also Figure 2 In one embodiment, a first partition plate 91 and a second partition plate 92 are provided in the distillation tower and between the azeotropic water-carrying agent feed port 4 and the main feed port 11 , and the second partition plate 92 is located below the first partition plate 91 .
[0031] The first partition plate 91 is provided with a plurality of first through holes 911 , and the second partition plate 92 is provided with a plurality of second through holes 921 ; the first through holes 911 and the second through holes 921 are arranged alternately in the vertical direction.
[0032] The first partition plate 91 and the second partition plate 92 may be placed horizontally or tilted.
[0033] The recovered oil phase material can be dispersed faster after passing through the first partition plate 91 and the second partition plate 92 , which is beneficial to gas-liquid exchange and improves the oil-water separation in the distillation section 3 .
[0034] The combined reaction azeotropic dehydration device for VB6 esterification production provided in the present application combines azeotropic distillation with azeotropic water-carrying agent pretreatment. Compared with the traditional method, the water content of the water-carrying agent entering the reaction distillation kettle is low, the reaction rate is increased, the reaction time is reduced, the reaction energy consumption is reduced, and the corresponding reaction equipment investment is reduced.
[0035] In the description of the present application, it should be understood that terms such as "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientation or positional relationships are based on the orientation or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.
[0036] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.
[0037] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.
Claims
1. A combined reaction and azeotropic dehydration device for VB6 esterification production, comprising a reaction distillation kettle and a distillation tower, characterized in that: The reaction distillation kettle is located on one side of the distillation tower, and the top outlet of the reaction distillation kettle is connected to the main feed port of the distillation tower to form a side feed; the distillation tower is provided with an azeotropic water-carrying agent feed port, and the azeotropic water-carrying agent feed port is used to fill the distillation tower with the azeotropic water-carrying agent; the distillation tower is also provided with a steam inlet, and the steam inlet is connected to a tower bottom reboiler; The steam inlet is located below the azeotropic water-carrying agent feed port, and the azeotropic water-carrying agent feed port is located below the main feed port.
2. The azeotropic dehydration combined reaction device for VB6 esterification production according to claim 1, characterized in that: The distillation tower comprises a stripping section located at the bottom and a rectifying section located at the top; wherein the main feed inlet and the azeotropic water-carrying agent feed inlet are located between the stripping section and the rectifying section, and the steam inlet is located below the stripping section.
3. The azeotropic dehydration combined reaction device for VB6 esterification production according to claim 2, characterized in that: It also includes a condenser, and at least one condenser is provided.
4. The azeotropic dehydration combined reaction device for VB6 esterification production as claimed in claim 3, characterized in that: The condensers are provided with two, and the two condensers are arranged in series.
5. The azeotropic dehydration combined reaction device for VB6 esterification production according to claim 2, characterized in that: A first partition is arranged in the distillation tower and between the azeotropic water-carrying agent feed port and the main feed port, and a plurality of first through holes are arranged on the first partition.
6. The azeotropic reaction and dehydration combined device for VB6 esterification production according to claim 5, characterized in that: The first partition is placed horizontally.
7. The azeotropic dehydration combined reaction device for VB6 esterification production according to claim 5, characterized in that: The first partition is placed obliquely.
8. The azeotropic dehydration combined reaction device for VB6 esterification production according to claim 2, characterized in that: A first partition and a second partition are arranged in the distillation tower between the azeotropic water-carrying agent feed port and the main feed port, and the second partition is located below the first partition; The first partition plate is provided with a plurality of first through holes, and the second partition plate is provided with a plurality of second through holes; the first through holes and the second through holes are arranged alternately in the vertical direction.
9. The azeotropic dehydration combined reaction device for VB6 esterification production according to claim 8, characterized in that: The first partition plate and the second partition plate are both placed horizontally.
10. The azeotropic dehydration combined reaction device for VB6 esterification production according to claim 8, characterized in that: The first partition plate and the second partition plate are both placed obliquely.