Esterification reaction condensing equipment

Abstract

The utility model relates to esterification reaction condensing equipment, which relates to the technical field of condensers and comprises a reaction kettle, a condenser, an oil-water separator and a cooling tower. The reaction kettle is communicated with the condensers, the number of the condensers is three, the three condensers are sequentially connected through connecting pipes, the three condensers are sequentially divided into a first-stage condenser, a second-stage condenser and a third-stage condenser in the direction of the connecting pipes, and the input end of the first-stage condenser and the output end of the third-stage condenser are both communicated with the reaction kettle. The oil-water separator is arranged between the second-stage condenser and the third-stage condenser, the condensers are communicated with cooling towers, the cooling towers are used for continuously providing cooling water for the condensers, and the cooling temperatures of the three cooling towers are different. The method has the effect of improving the condensation efficiency in the reaction process so as to improve the final yield of the product.

Description

Technical Field

[0001] The present application relates to the technical field of condensers, and in particular to an esterification reaction condensation device. Background Art

[0002] Esterification, a key chemical process involving the reaction of alcohols with carboxylic acids or inorganic oxygen-containing acids to form esters and water, is widely used in various fields. During the esterification process, effective heat removal and timely removal of water from the reaction products are crucial to ensuring steady-state reaction conditions. Condensation is often used in the industry to remove water and exchange heat.

[0003] Existing technologies typically use cooling water at a single temperature to condense the high-temperature steam in the reaction, which can meet basic cooling needs. However, the single cooling method in a single temperature range cannot flexibly respond to temperature changes during the esterification reaction, resulting in poor condensation effect and the easy generation of a large amount of difficult-to-handle colloidal substances, thereby affecting the stability of the entire process and the final yield of the product. Utility Model Content

[0004] In order to improve the condensation efficiency during the reaction process and thus increase the final yield of the product, the present application provides an esterification reaction condensation device.

[0005] The present application provides an esterification reaction condensation device, which adopts the following technical solution:

[0006] An esterification reaction condensation device, comprising:

[0007] A reactor, wherein the reactor is provided with a feeding port, a discharge pipe is connected to the bottom of the reactor, a valve is provided on the discharge pipe, an output pipe is connected to the top of the reactor, and an input pipe is connected to the reactor;

[0008] Condensers, wherein three condensers are provided, and the three condensers are sequentially connected by connecting pipes. The three condensers are sequentially divided into a primary condenser, a secondary condenser, and a tertiary condenser along the direction of the connecting pipes. The input end of the primary condenser is connected to the output pipe, and the output end of the tertiary condenser is connected to the input pipe;

[0009] An oil-water separator, the oil-water separator being arranged between the secondary condenser and the tertiary condenser, the input end of the oil-water separator being in communication with the output end of the secondary condenser, the output end of the oil-water separator being in communication with the input end of the tertiary condenser, a drain pipe being provided at the bottom of the oil-water separator, and a drain valve being provided on the drain pipe;

[0010] Wherein, a cooling tower is connected to the condenser and is used to continuously provide cooling water to the condenser. The cooling temperatures of the three cooling towers are different.

[0011] By adopting the above technical solution, alcohol and acid are fed into the reactor through the feed port for heating reaction, and the high-temperature steam generated enters the condenser from the reactor through the output pipe. By setting three condensers connected in sequence, multi-stage condensation of the esterification reaction product is achieved. Each stage of the condenser can further reduce the temperature of the product, thereby improving the condensation efficiency, ensuring that more reaction products are condensed, and improving the product yield. The cooling towers connected to the three condensers have different cooling temperatures, and cooling water is continuously provided to the condensers. Targeted cooling can be carried out according to the temperature and characteristics of the products at different stages, thereby optimizing the condensation process and improving the condensation efficiency. The oil-water separator separates the oil-water mixture generated during the condensation process, and the water is discharged from the drain pipe. The product generated by the reaction enters the next reaction process. The cooling temperatures of the three cooling towers can be different, and the operator can adjust according to the actual production situation, thereby flexibly responding to temperature changes during the esterification reaction and improving the condensation efficiency during the reaction process.

[0012] Optionally, the condenser includes:

[0013] A tank body, wherein a guide pipe is provided on the tank body, both ends of the guide pipe are connected to the tank body, one end of the guide pipe is connected and arranged above the side wall of the tank body, and the cooling tower is arranged on the guide pipe;

[0014] an upper cover plate, the upper cover plate being arranged on the tank body and connected to the tank body by bolts;

[0015] a tube sheet fixedly mounted in the tank;

[0016] a partition plate, the partition plate being arranged in the upper cover plate, the partition plate being fixedly mounted on the tube plate, and the partition plate separating the input end of the condenser from the input end of the condenser;

[0017] Cooling pipes, the number of which is not less than two, the cooling pipes being U-shaped pipes, both ends of which are passed through the tube plate, and the two ends of the cooling pipes are respectively connected to the input end of the condenser and the input end of the condenser.

[0018] By adopting the above technical solution, the setting of the guide pipe enables the cooling water to circulate from bottom to top in the tank body to cool the product in the cooling pipe. The cooling tower is set on the guide pipe, so that the cooling water flowing through the condenser is quickly cooled by the cooling tower, and then enters the tank body for heat exchange with the cooling pipe. The high-temperature steam generated from the reactor enters the input end of the condenser and then enters the cooling pipe. The cooling pipe is designed to be U-shaped, which increases the length of the cooling pipe in the tank body, thereby increasing the contact area and contact time between the high-pressure steam and the cooling water, making the heat exchange more sufficient and improving the condensation efficiency. At the same time, the U-shaped structure also helps the fluid flow more smoothly in the cooling pipe and reduces the flow resistance. The upper cover plate is connected to the tank body by bolts, which is convenient for disassembly and installation during maintenance. The tube plate fixes the cooling pipe in the tank body to maintain the sealing performance between the cooling pipe and the tank body. The partition plate separates the input and output ends of the condenser, so that the high-pressure steam and the condensed liquid can flow in an orderly manner, realizing the condensation of the high-pressure steam.

[0019] Optionally, the condenser further comprises:

[0020] A lower cover plate is provided below the tank body and is connected to the tank body via bolts; one end of the guide pipe is connected to the lower cover plate.

[0021] By adopting the above technical solution, the lower cover plate is connected to the tank body by bolts. When maintenance and inspection of the inside of the condenser is required, the lower cover plate can be easily removed. By removing the lower cover plate, all the cooling pipes can be pulled out, which facilitates the inspection, cleaning and maintenance of the cooling pipes and the inside of the condenser.

[0022] Optionally, a water pump is provided between the primary condenser and the secondary condenser, and two ends of the water pump are respectively connected to the output end of the primary condenser and the input end of the secondary condenser.

[0023] By adopting the above technical solution, during the condensation process, due to factors such as the pipeline length, degree of curvature and internal structure of the equipment, the esterification reaction product will encounter a certain resistance during the flow process. The setting of the water pump can overcome the resistance, ensure that the flow of the reaction product between different condensers is unimpeded, and improve the working efficiency of the condensation process.

[0024] Optionally, a fixing plate is fixedly installed in the tank body, the cooling pipe is passed through the fixing plate, and the fixing plate is used to fix the cooling pipe.

[0025] By adopting the above technical solution, the fixing plate can firmly fix the cooling pipe so that it will not be displaced in the tank body due to the impact, vibration or other external forces of the fluid. At the same time, it ensures that multiple cooling pipes are evenly distributed and maintain a certain distance between them, avoiding the cooling pipes from contacting each other or being too close to affect the heat exchange effect. Reasonable spacing is conducive to the flow of cooling water between the cooling pipes, improving the efficiency of heat exchange and achieving more efficient heat exchange.

[0026] Optionally, a pH tester is provided in the reactor, and the pH tester is used to judge the degree of reaction. A controller is fixedly installed on the primary condenser, and the pH tester and the cooling tower are electrically connected to the controller.

[0027] By adopting the above technical solution, the pH tester can monitor the pH changes in the reactor in real time, thereby reflecting the reaction degree of the esterification reaction. The pH tester transmits the test results to the controller, and the controller can adjust the cooling temperature of the cooling tower according to the reaction degree in the reactor. In the early stage of the reaction, the output of high-temperature steam is small, and the controller reduces the cooling power of the cooling tower to save energy. As the reaction proceeds, the output of high-temperature steam increases, and the controller can increase the cooling temperature of the cooling tower accordingly to ensure that the condenser can effectively condense the steam. By continuously monitoring the pH, the operator can accurately understand the progress of the reaction, adjust the reaction conditions in time, and ensure that the reaction proceeds under the best conditions.

[0028] Optionally, a one-way valve is provided on the input pipe.

[0029] By adopting the above technical solution, the one-way valve can prevent the high-pressure steam in the reactor from directly entering the three-stage condenser through the output pipe, thereby destroying the reaction and condensation process. The setting of the one-way valve ensures that the reaction always proceeds in the predetermined direction.

[0030] Optionally, an observation window is provided on the connecting pipe between the output end of the oil-water separator and the input end of the three-stage condenser.

[0031] By adopting the above technical solution, the state of the fluid flowing out of the oil-water separator can be directly observed through the observation window to judge whether the oil-water separation effect is good. At the same time, it helps the operator to promptly discover pipeline blockage, leakage or other abnormal conditions, so as to quickly take corresponding treatment measures to ensure the normal progress of the entire condensation process.

[0032] In summary, this application includes at least one of the following beneficial technical effects:

[0033] 1. By setting up three condensers, multi-stage condensation of the esterification reaction product is achieved, which improves the condensation efficiency during the reaction process and thus increases the final yield of the product;

[0034] 2. By setting up three cooling towers, the cooling temperatures of the three cooling towers can be different. Operators can adjust them according to actual production conditions, thereby flexibly responding to temperature changes during the esterification reaction and improving the condensation efficiency during the reaction process;

[0035] 3. By setting up a pH tester, the pH changes in the reactor can be monitored in real time, thereby reflecting the degree of esterification reaction and allowing operators to accurately understand the progress of the reaction. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 It is a structural diagram of an embodiment of the present application;

[0037] Figure 2 It is a partial cross-sectional view of an embodiment of the present application.

[0038] Description of reference numerals:

[0039] 1. Reactor; 11. Feeding port; 12. Discharge pipe; 13. Valve; 14. Output pipe; 15. Input pipe; 2. Condenser; 21. Tank body; 22. Draft tube; 23. Upper cover; 24. Tube sheet; 25. Partition plate; 26. Cooling pipe; 27. Lower cover; 3. Oil-water separator; 31. Drain pipe; 32. Drain valve; 4. Cooling tower; 5. Water pump; 6. pH tester; 7. Controller; 8. One-way valve; 9. Observation window. DETAILED DESCRIPTION

[0040] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features therein can be combined with each other.

[0041] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 cannot be understood as limiting the present invention. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, features defined as "first", "second", etc. may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0042] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0043] The following is combined with Figure 1-2 This application is described in further detail.

[0044] The embodiment of the present application discloses an esterification reaction condensation device.

[0045] Reference Figure 1 The esterification reaction condensation equipment includes a reactor 1, a condenser 2, an oil-water separator 3 and a cooling tower 4. The reactor 1 is connected to the condenser 2. There are three condensers 2. The three condensers 2 are connected in sequence through connecting pipes. The three condensers 2 are divided into a first-stage condenser, a second-stage condenser and a third-stage condenser along the direction of the connecting pipe. The input end of the first-stage condenser and the output end of the third-stage condenser are both connected to the reactor 1. The oil-water separator 3 is arranged between the second-stage condenser 2 and the third-stage condenser 2. A cooling tower 4 is connected to the condenser 2. The cooling tower 4 is used to continuously provide cooling water for the condenser 2. The cooling temperatures of the three cooling towers 4 are different.

[0046] During use, the esterification reaction begins in the reactor 1. As the esterification reaction proceeds, the high-temperature steam generated in the reactor 1 enters the primary condenser for preliminary condensation. The high-temperature steam after the primary condensation and the liquefied reaction product enter the secondary condenser for further condensation. The reaction product output from the secondary condenser enters the oil-water separator 3, where water and the reaction product are separated into layers. The water is discharged from the equipment, and the reaction product enters the tertiary condenser. In the tertiary condenser, it is finally condensed into liquid and then returns to the reactor 1 to continue to participate in the reaction, thereby improving the condensation efficiency during the reaction process and thus improving the final yield of the product.

[0047] Reference Figure 1 and Figure 2 The reactor 1 is provided with a feeding port 11, a discharge pipe 12 is connected to the bottom of the reactor 1, a valve 13 is provided on the discharge pipe 12, an output pipe 14 is connected to the top of the reactor 1, the input end of the first-stage condenser 2 is connected to the output pipe 14, the reactor 1 is connected with an input pipe 15, the output end of the third-stage condenser is connected to the input pipe 15, a one-way valve 8 is provided on the input pipe 15, and a pH tester 6 is provided in the reactor 1. The pH tester 6 is used to facilitate the operator to judge the degree of reaction.

[0048] The input end of the oil-water separator 3 is connected to the output end of the secondary condenser, and the output end of the oil-water separator 3 is connected to the input end of the tertiary condenser. A drain pipe 31 is provided at the bottom of the oil-water separator 3, and a drain valve 32 is provided on the drain pipe 31. The oil-water separator 3 used in this application is existing technology and will not be elaborated here.

[0049] During use, the raw materials to be reacted are fed into the reactor 1 through the feeding port 11 on the reactor 1, the reactor 1 is started, and the esterification reaction begins. The pH change in the reactor 1 is closely observed through the pH tester 6 to judge the raw material input situation and the progress of the reaction. When the reaction proceeds to a certain extent, high-temperature steam begins to be generated in the reactor 1. The high-temperature steam enters the primary condenser through the output pipe 14 on the top of the reactor 1. The primary condenser preliminarily condenses the high-temperature steam. The reaction product after the primary condensation enters the secondary condenser for further condensation. The steam output by the secondary condenser and the liquefied reaction product enter the oil-water separator 3 to separate the required reaction product from water. The water is discharged from the equipment through the drain pipe 31. The required reaction product enters the tertiary condenser and is finally condensed into liquid. The condensed liquid flows back to the reactor 1 through the input pipe 15 to continue to participate in the reaction.

[0050] Reference Figure 1 and Figure 2 The condenser 2 includes a tank body 21, a tube sheet 24, a partition plate 25, a cooling tube 26, an upper cover plate 23, and a lower cover plate 27. The tank body 21 is vertically arranged, the upper cover plate 23 is arranged above the tank body 21 and is connected to the tank body 21 by bolts, and the lower cover plate 27 is arranged below the tank body 21 and is connected to the tank body 21 by bolts.

[0051] A guide pipe 22 is provided on the tank body 21, and the two ends of the guide pipe 22 are respectively connected to the lower cover plate 27 and the upper side wall of the tank body 21. The cooling tower 4 is provided on the guide pipe 22. The cooling tower 4 used in this application is an existing technology and will not be elaborated here.

[0052] The tube sheet 24 is horizontally arranged and fixedly installed in the tank body 21, the cooling tube 26 is fixedly installed on the tube sheet 24, and the partition plate 25 is vertically arranged in the upper cover plate 23 and fixedly connected to the tube sheet 24. The partition plate 25 separates the input end of the condenser 2 from the input end of the condenser 2.

[0053] There are no less than two cooling pipes 26 , which are U-shaped pipes. Both ends of the cooling pipe 26 are passed through the tube plate 24 , and the two ends of the cooling pipe 26 are connected to the input end of the condenser 2 and the input end of the condenser 2 respectively.

[0054] A plurality of fixing plates are fixedly installed in the tank body 21 , and the cooling pipe 26 is passed through the fixing plates, which are used to fix the cooling pipe 26 .

[0055] During use, when the high-temperature steam generated by the esterification reaction enters the condenser 2, it first enters the cooling pipe 26 in the tank body 21 through the input end of the condenser 2. The steam exchanges heat with the cooling water in the tank body 21 in the cooling pipe 26. The cooling tower 4 continuously cools the cooling water in the guide pipe 22. The cooled cooling water continues to flow from the guide pipe 22 into the tank body 21 for continuous circulation. The high-temperature steam gradually condenses into a liquid in the cooling pipe 26 and flows out from the other end of the cooling pipe 26. Under the action of the partition plate 25, it flows out from the output end of the condenser 2. The fixing plate can firmly fix the cooling pipe 26 so that it will not be displaced in the tank body 21 due to the impact, vibration or other external forces of the fluid. If a fault is found in the condenser 2, the upper cover plate 23 and the lower cover plate 27 are opened for inspection. If the inside of the cooling pipe 26 needs to be cleaned, the lower cover plate 27 needs to be opened and the cooling pipe 26 needs to be pulled out downward for cleaning to ensure that the condenser 2 can operate normally.

[0056] Reference Figure 1 A water pump 5 is provided between the primary condenser 2 and the secondary condenser 2. The two ends of the water pump 5 are respectively connected to the output end of the primary condenser 2 and the input end of the secondary condenser 2. The setting of the water pump 5 can overcome the resistance caused by factors such as the length of the pipeline, the degree of curvature and the internal structure of the equipment, thereby ensuring that the flow of the reaction products between different condensers 2 is not hindered and improving the working efficiency of the condensation process.

[0057] Reference Figure 1 and Figure 2 A one-way valve 8 is installed on the input pipe 15 to prevent the high-pressure steam in the reactor 1 from directly entering the tertiary condenser 2 through the output pipe 14, thereby disrupting the reaction and condensation process. An observation window 9 is installed on the connecting pipe between the output end of the oil-water separator 3 and the input end of the tertiary condenser, allowing direct observation of the state of the fluid flowing out of the oil-water separator 3 and judging whether the oil-water separation effect is satisfactory.

[0058] Reference Figure 1 and Figure 2 A controller 7 is fixedly installed on the primary condenser 2, and the pH tester 6 and the cooling tower 4 are electrically connected to the controller 7. The controller 7 can adjust the cooling temperature of the cooling tower 4 according to the reaction degree in the reactor 1 to ensure that the reaction is carried out under the best condition.

[0059] The implementation principle of the esterification reaction condensation equipment in the embodiment of the present application is as follows: in the reactor 1, the raw materials are added through the feeding port 11, and the esterification reaction begins. The pH tester 6 set in the reactor 1 monitors the reaction degree in real time, which is convenient for the operator to grasp the reaction progress and adjust the reaction conditions in time. The steam generated by the reaction enters the primary condenser through the output pipe 14. The high-temperature steam exchanges heat with the cooling water in the cooling pipe 26 in the condenser 2 and is gradually condensed.

[0060] After preliminary condensation in the primary condenser, the steam enters the secondary condenser for further condensation and then enters the oil-water separator 3. The oil-water separator 3 uses the different densities of oil and water to separate oil and water. The water is discharged through the drain pipe 31. The desired product enters the tertiary condenser for final condensation. The output end of the tertiary condenser returns the condensed liquid to the reactor 1 through the input pipe 15 to continue participating in the reaction.

[0061] During the entire process, the three cooling towers 4 provide cooling water of different temperatures to the three condensers 2 respectively to meet the condensation requirements at different stages. Through this graded condensation and oil-water separation method, the condensation efficiency and product quality are improved.

[0062] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. An esterification reaction condensation device, characterized in that: include: A reactor (1), wherein the reactor (1) is provided with a feeding port (11), a discharge pipe (12) is provided at the bottom of the reactor (1), a valve (13) is provided on the discharge pipe (12), an output pipe (14) is provided at the top of the reactor (1), and an input pipe (15) is provided on the reactor (1); Condenser (2), wherein three condensers (2) are provided, and the three condensers (2) are sequentially connected via connecting pipes. The three condensers (2) are sequentially divided into a first-stage condenser, a second-stage condenser, and a third-stage condenser along the direction of the connecting pipes. The input end of the first-stage condenser is connected to the output pipe (14), and the output end of the third-stage condenser is connected to the input pipe (15); An oil-water separator (3), the oil-water separator (3) being arranged between the secondary condenser and the tertiary condenser, the input end of the oil-water separator (3) being in communication with the output end of the secondary condenser, the output end of the oil-water separator (3) being in communication with the input end of the tertiary condenser, a drain pipe (31) being provided at the bottom of the oil-water separator (3), and a drain valve (32) being provided on the drain pipe (31); The condenser (2) is connected to a cooling tower (4), and the cooling tower (4) is used to continuously provide cooling water for the condenser (2). The cooling temperatures of the three cooling towers (4) are different.

2. The esterification reaction condensation equipment according to claim 1, characterized in that: The condenser (2) comprises: A tank body (21), wherein a flow guide pipe (22) is provided on the tank body (21), both ends of the flow guide pipe (22) are in communication with the tank body (21), one end of the flow guide pipe (22) is provided above the side wall of the tank body (21), and the cooling tower (4) is provided on the flow guide pipe (22); an upper cover plate (23), the upper cover plate (23) being arranged on the tank body (21) and connected to the tank body (21) via bolts; a tube sheet (24), the tube sheet (24) being fixedly mounted in the tank body (21); a partition plate (25), the partition plate (25) being arranged in the upper cover plate (23), the partition plate (25) being fixedly mounted on the tube plate (24), and the partition plate (25) separating the input end of the condenser (2) from the input end of the condenser (2); A cooling pipe (26), the number of the cooling pipes (26) is not less than two, the cooling pipe (26) is a U-shaped pipe, both ends of the cooling pipe (26) are passed through the tube plate (24), and the two ends of the cooling pipe (26) are respectively connected to the input end of the condenser (2) and the input end of the condenser (2).

3. The esterification reaction condensation equipment according to claim 2, characterized in that: The condenser (2) further comprises: A lower cover plate (27) is provided below the tank body (21) and is connected to the tank body (21) via bolts; one end of the flow guide pipe (22) is connected to the lower cover plate (27).

4. The esterification reaction condensation equipment according to claim 1, characterized in that: A water pump (5) is provided between the primary condenser and the secondary condenser, and two ends of the water pump (5) are respectively connected to the output end of the primary condenser and the input end of the secondary condenser.

5. The esterification reaction condensation equipment according to claim 2, characterized in that: A fixing plate is fixedly installed in the tank body (21), the cooling pipe (26) is passed through the fixing plate, and the fixing plate is used to fix the cooling pipe (26).

6. The esterification reaction condensation equipment according to claim 1, characterized in that: A pH tester (6) is provided in the reactor (1), and the pH tester (6) is used to judge the degree of reaction. A controller (7) is fixedly installed on the primary condenser (2), and the pH tester (6) and the cooling tower (4) are both electrically connected to the controller (7).

7. The esterification reaction condensation equipment according to claim 1, characterized in that: A one-way valve (8) is provided on the input pipe (15).

8. The esterification reaction condensation equipment according to claim 1, characterized in that: An observation window (9) is provided on the connecting pipe between the output end of the oil-water separator (3) and the input end of the three-stage condenser.

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