Esterification kettle with high esterification rate

Abstract

The utility model discloses an esterification kettle with high esterification rate, which relates to the technical field of esterification kettles and comprises a kettle body, a buffer tank and a jacket, the buffer tank is arranged on one side of the kettle body, the jacket is sleeved on the outer wall of the buffer tank, a polyhydric alcohol inlet pipe and a dihydric alcohol inlet pipe are respectively mounted on two sides of the top of the kettle body, and the jacket is sleeved on the jacket. A heating coil is arranged between the jacket and the kettle body, and a stirring assembly for stirring materials is arranged on the kettle body. According to the esterification reaction kettle, materials are stirred through the stirring rods and the stirring blades which are arranged in a staggered manner, so that the materials can be fully mixed, reactant molecules are fully contacted, the uniformity and the reaction rate of esterification reaction are improved, the esterification rate is further improved, and the quality stability of reaction products is ensured; the inner wall of the kettle body can be conveniently scraped in the stirring process, materials can be prevented from being attached to the inner wall, and the reaction conversion rate and the product purity are improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to esterification kettle technical field, specifically a kind of esterification kettle of high esterification rate. BACKGROUND

[0002] Esterification kettle is a kind of reaction equipment for carrying out esterification reaction. More specifically, it is an industrial reactor, which is specially used to promote the reaction between alcohol and carboxylic acid (or other derivatives, such as anhydride or acyl chloride) to generate ester and water (or other by-products).

[0003] For example, the patent with the authorization announcement number CN220861418U describes a kind of esterification kettle of high esterification efficiency, wherein the scheme is described: by being fixedly installed with auxiliary mechanism in the inside of esterification kettle main body, by heating pipe, electric energy is converted into heat energy, the central position at the inside of esterification kettle main body can be heated, and heating mechanism can heat the outer wall of esterification kettle main body, by heating pipe and heating mechanism, the material in the inside of esterification kettle main body can be heated sufficiently and uniformly, so as to increase the heating area of material, and then the effect of esterification treatment of material is not affected.

[0004] In the above-mentioned technology, when using the esterification kettle for reaction, when adding multiple raw materials, due to the different characteristics of various materials, the raw materials with large density difference may stratify, causing some reactants to concentrate in the upper or lower layer of the kettle, while other reactants are difficult to contact, which may cause the materials to not mix sufficiently, resulting in uneven reaction and affecting the quality of reaction products. UTILITY MODEL CONTENT

[0005] The purpose of the present utility model is to provide an esterification kettle with high esterification rate to solve the problems in the background art.

[0006] To achieve the above-mentioned purpose, the present utility model provides the following technical solutions:

[0007] An esterification kettle with high esterification rate, comprising:

[0008] A kettle body;

[0009] A buffer tank is arranged on one side of the kettle body;

[0010] Further comprising a jacket, the jacket is sleeved on the outer wall of the buffer tank, polyol inlet pipe and dihydric alcohol inlet pipe are respectively arranged on both sides of the top of the kettle body, heating coil is arranged between the jacket and the kettle body, and stirring assembly for stirring materials is arranged on the kettle body.

[0011] On the basis of the above-mentioned technical solutions, the present utility model further provides the following optional technical solutions:

[0012] In an optional scheme, the stirring assembly comprises a motor, the motor is installed on the top of the kettle body, an output end of the motor is provided with a stirring rod, an outer wall of the stirring rod is provided with a plurality of stirring blades, a middle portion of the outer wall of the stirring rod is provided with a fixing strip, both ends of the fixing strip are slidably connected with connecting plates, both ends of the two connecting plates away from each other are provided with scrapers.

[0013] In an optional scheme, the fixing assembly comprises a threaded rod, the threaded rod is threadedly connected with the inside of the connecting plate, one end of the threaded rod is provided with a wedge-shaped block, the inside of the sliding groove is slidably connected with the wedge-shaped block, both sides of the inside of the sliding groove are slidably connected with clamping blocks, the inner bottom wall of the sliding groove is provided with a fixing block, both sides of the clamping blocks close to the fixing block are provided with moving blocks, both sides of the two moving blocks close to each other are provided with tension springs, one end of the tension spring is fixedly connected with the fixing block, the clamping blocks and the wedge-shaped block are matched with each other, and the inside of the fixing strip is provided with a clamping groove.

[0014] In an optional scheme, the buffer tank is provided with a buffer assembly for buffering the gas in the kettle body.

[0015] In an optional scheme, the buffer assembly comprises an air outlet pipe, the air outlet pipe is communicated with the top of the kettle body, one end of the air outlet pipe is communicated with the buffer tank, the inside of the buffer tank is provided with a buffer plate, the bottom of one side of the buffer tank is communicated with an exhaust pipe, one end of the exhaust pipe is communicated with the kettle body, the exhaust pipe and the air outlet pipe are both provided with control valves, and the top of the buffer tank is provided with a safety valve.

[0016] In an optional scheme, the plurality of stirring blades are arranged in a staggered manner.

[0017] In an optional scheme, the bottom of the kettle body is provided with a slag discharge port, and the slag discharge port is provided with an electromagnetic valve.

[0018] In an optional scheme, the kettle body and the jacket are provided with an access door.

[0019] Compared with the prior art, the utility model has the advantages of the following:

[0020] The utility model discloses a stirring rod and the staggered stirring blade are arranged, the material is stirred, can make the material fully mix, lets the reactant molecule fully contact, improves the evenness and reaction rate of esterification reaction, and then promotes the esterification rate, guarantees the quality stability of reaction product, and the detachable scraper is arranged, is convenient for scraping the kettle inner wall in the stirring process, can prevent the material from adhering to the inner wall, improves the conversion rate of reaction and the purity of product. BRIEF DESCRIPTION OF DRAWINGS

[0021] Figure 1 It is a structure schematic view of the utility model.

[0022] Figure 2 It is a structure schematic view of the utility model.

[0023] Figure 3 It is a structure schematic view of the utility model.

[0024] Wherein: 100, kettle body;200, buffer tank;301, jacket;302, polyol inlet pipe;303, dihydric alcohol inlet pipe;304, heating coil;401, motor;402, stirring rod;403, stirring blade;404, fixed strip;405, connecting plate;406, scraper;501, threaded rod;502, wedge block;503, sliding groove;504, clamping block;505, fixed block;506, moving block;507, tension spring;508, clamping groove;601, air outlet pipe;602, buffer plate;603, exhaust pipe;604, control valve. DETAILED DESCRIPTION

[0025] In order to make the utility model's purpose, technical scheme and advantage more clearly, the following is combined with the drawing and example, and the utility model is further detailed.

[0026] In one embodiment, as shown in Figures 1-3 A high esterification rate esterification kettle, including: kettle body 100, buffer tank 200 and jacket 301, the buffer tank 200 is set up in one side of kettle body 100, the jacket 301 is set up in the outer wall of buffer tank 200, the both sides of kettle body 100 top are installed with polyol inlet pipe 302 and dihydric alcohol inlet pipe 303 respectively, the jacket 301 is provided with heating coil 304 between kettle body 100, be provided with the stirring assembly for the material of kettle body 100 is stirred;When using, polyol and dihydric alcohol enter kettle body 100 through polyol inlet pipe 302 and dihydric alcohol inlet pipe 303 respectively, and heating coil 304 provides suitable temperature condition for esterification reaction in kettle body 100.

[0027] In one embodiment, as shown in Figure 2As shown, the stirring assembly comprises a motor 401 mounted on the top of the kettle body 100, an output end of the motor 401 is provided with a stirring rod 402, an outer wall of the stirring rod 402 is provided with a plurality of stirring blades 403, a middle portion of the outer wall of the stirring rod 402 is provided with a fixing strip 404, both ends of the fixing strip 404 are slidably connected with connecting plates 405, both ends of the connecting plates 405 away from each other are provided with scrapers 406, and the fixing strip 404 is provided with a fixing assembly for fixing the scrapers 406.

[0028] In one embodiment, as shown in Figure 2 and Figure 3 The fixing assembly comprises a threaded rod 501 threadedly connected to the inside of the connecting plate 405, one end of the threaded rod 501 is provided with a wedge block 502, the inside of the connecting plate 405 is provided with a sliding groove 503, the wedge block 502 is slidably connected to the inside of the sliding groove 503, both sides of the inside of the sliding groove 503 are further slidably connected with clamping blocks 504, the inside bottom wall of the sliding groove 503 is provided with a fixing block 505, both sides of the fixing block 505 close to the clamping blocks 504 are provided with moving blocks 506, both sides of the moving blocks 506 close to each other are provided with tension springs 507, one end of the tension springs 507 is fixedly connected to the fixing block 505, the clamping blocks 504 and the wedge block 502 are matched with each other, and the inside of the fixing strip 404 is provided with a clamping groove 508.

[0029] In one embodiment, as shown in Figure 1 and Figure 2As shown, the buffer assembly includes a gas outlet pipe 601, which is communicated with the top of the kettle body 100, one end of the gas outlet pipe 601 is communicated with the buffer tank 200, the buffer plate 602 is installed in the buffer tank 200, the bottom of one side of the buffer tank 200 is communicated with the exhaust pipe 603, one end of the exhaust pipe 603 is communicated with the kettle body 100, the control valve 604 is installed on the exhaust pipe 603 and the gas outlet pipe 601, and the safety valve 605 is installed on the top of the buffer tank 200; when the gas pressure in the kettle body 100 is too high, the control valve 604 on the gas outlet pipe 601 is automatically opened, the gas enters the buffer tank 200 through the gas outlet pipe 601, when the gas pressure in the kettle body 100 is too low, the control valve 604 on the exhaust pipe 603 is opened, the gas stored in the buffer tank 200 is discharged into the interior of the kettle body 100 through the exhaust pipe 603, the buffer plate 602 can slow down the flow speed of the gas, and when the pressure in the buffer tank 200 exceeds a safety value, the safety valve 605 is opened to release the pressure, so that the equipment is safe.

[0030] In one embodiment, as shown in Figure 2 The plurality of stirring blades 403 are arranged in a staggered manner; the stirring blades 403 at different positions can stir the material from different angles, increase the stirring range and effect, make the material mixing more uniform, and further improve the esterification reaction efficiency and esterification rate.

[0031] In one embodiment, as shown in Figure 1 And Figure 2 The bottom of the kettle body 100 is provided with a slag discharge port, and an electromagnetic valve is installed on the slag discharge port; after the esterification reaction is completed, the electromagnetic valve on the slag discharge port is opened, the waste slag in the kettle body 100 can be discharged through the slag discharge port, the kettle body 100 is convenient to clean, and preparation for the next reaction is made.

[0032] In one embodiment, as shown in Figure 1 The jacket 301 and the kettle body 100 are provided with an inspection door; the scraper 406 is convenient to replace.

[0033] The above embodiment discloses an esterification kettle with high esterification rate, wherein, in use, the polyhydric alcohol and dihydric alcohol enter the kettle body 100 through the polyhydric alcohol inlet pipe 302 and the dihydric alcohol inlet pipe 303 respectively, the heating coil 304 provides suitable temperature conditions for the esterification reaction in the kettle body 100, and then the motor 401 is started, the output end of the motor 401 drives the stirring rod 402 to rotate, the stirring blades 403 on the stirring rod 402 rotate accordingly, and the materials in the kettle body 100 are stirred to promote the mixing of the materials. At the same time, the fixed strip 404 rotates with the stirring rod 402, the connecting plate 405 is slidable on the fixed strip 404, the scraper 406 is installed on the connecting plate 405, and the scraper 406 can scrape the inner wall of the kettle body 100 during stirring to prevent the materials from adhering to the inner wall of the kettle body 100 and ensure that the reaction is fully carried out. When the air pressure in the kettle body 100 is too high, the control valve 604 on the gas outlet pipe 601 is automatically opened, and the gas enters the buffer tank 200 through the gas outlet pipe 601. When the air pressure in the kettle body 100 is too low, the control valve 604 on the exhaust pipe 603 is opened, and the gas stored in the buffer tank 200 is discharged into the interior of the kettle body 100 through the exhaust pipe 603. The buffer plate 602 can slow down the flow speed of the gas. When the pressure in the buffer tank 200 exceeds a safety value, the safety valve 605 is opened to release the pressure and ensure the safety of the equipment.

[0034] When it is necessary to install or dismount the scraper 406, the threaded rod 501 is rotated, the threaded rod 501 drives the wedge-shaped block 502 to slide in the sliding groove 503, the wedge-shaped block 502 slides and cooperates with the clamping block 504, thereby extruding the clamping block 504 to make the clamping block 504 slide in the sliding groove 503 and move to both sides. The clamping block 504 slides and drives the moving block 506 to move, thereby stretching the tension spring 507, so that the clamping block 504 gradually moves to the position of the clamping groove 508 and is clamped in the clamping groove 508, achieving the fixation of the scraper 406. Conversely, the threaded rod 501 is reversely rotated to make the clamping block 504 disengage from the clamping groove 508, achieving the dismounting of the scraper 406.

[0035] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed in the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. An esterification kettle with high esterification rate, comprising: a kettle body (100); a buffer tank (200) arranged on one side of the kettle body (100); characterized in that a jacket (301) is further arranged on the outer wall of the buffer tank (200), a polyol inlet pipe (302) and a dihydric alcohol inlet pipe (303) are respectively arranged on both sides of the top of the kettle body (100), a heating coil (304) is arranged between the jacket (301) and the kettle body (100), and a stirring assembly for stirring materials is arranged on the kettle body (100).

2. The esterification kettle with high esterification rate according to claim 1, characterized in that, The stirring assembly comprises a motor (401) arranged on the top of the kettle body (100), an output end of the motor (401) is provided with a stirring rod (402), the outer wall of the stirring rod (402) is provided with a plurality of stirring blades (403), a fixed strip (404) is arranged on the middle of the outer wall of the stirring rod (402), both ends of the fixed strip (404) are slidably connected with connecting plates (405), the ends of the two connecting plates (405) away from each other are provided with scrapers (406), and a fixing assembly for fixing the scrapers (406) is arranged on the fixed strip (404).

3. The esterification kettle of high esterification rate according to claim 2, characterized in that, The fixing assembly comprises a threaded rod (501) threadedly connected to the inside of the connecting plate (405), one end of the threaded rod (501) is provided with a wedge block (502), the inside of the connecting plate (405) is provided with a sliding groove (503), the wedge block (502) is slidably connected to the inside of the sliding groove (503), both sides of the inside of the sliding groove (503) are further slidably connected with clamping blocks (504), the inner bottom wall of the sliding groove (503) is provided with a fixed block (505), the side of the two clamping blocks (504) close to the fixed block (505) is provided with moving blocks (506), the sides of the two moving blocks (506) close to each other are provided with tension springs (507), one end of the tension spring (507) is fixedly connected to the fixed block (505), the clamping block (504) cooperates with the wedge block (502), and a clamping groove (508) is arranged in the inside of the fixed strip (404).

4. The esterification kettle of claim 1, wherein, A buffer assembly for buffering the gas in the kettle body (100) is arranged on the buffer tank (200).

5. The high esterification rate esterification kettle according to claim 4, characterized in that, The buffer assembly comprises an air outlet pipe (601) communicated with the top of the kettle body (100), one end of the air outlet pipe (601) is communicated with the buffer tank (200), a buffer plate (602) is arranged in the buffer tank (200), a gas discharge pipe (603) is communicated with the bottom of one side of the buffer tank (200), one end of the gas discharge pipe (603) is communicated with the kettle body (100), control valves (604) are arranged on the gas discharge pipe (603) and the air outlet pipe (601), and a safety valve (605) is arranged on the top of the buffer tank (200).

6. The esterification kettle of claim 2, wherein The plurality of stirring blades (403) are arranged in a staggered manner.

7. The esterification kettle of claim 1, wherein The bottom of the kettle body (100) is provided with a slag discharge port, and an electromagnetic valve is installed on the slag discharge port.

8. The esterification kettle of claim 2, wherein The jacket (301) is provided with an access door on the kettle body (100).

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