A chemical reactor

Abstract

The present invention discloses a chemical reaction kettle, which relates to the field of chemical reaction kettles and includes a kettle body and an inner liner. A water bath interlayer is arranged between the kettle body and the inner liner. An inlet pipe and an outlet pipe communicating with the water bath interlayer are arranged outside the kettle body. An exhaust gas recovery box is arranged on one side of the kettle body. A gas pipe with a matching control valve is arranged between the exhaust gas recovery box and the top of the kettle body. It is characterized in that a rotating shaft located in the inner liner is rotatably connected to the top of the kettle body. For this chemical reaction kettle, by arranging a scraping box on the rotating shaft, the attached crystals can be scraped during the rotation process. Moreover, with the mutual cooperation among the two-way gear pump, the first connecting pipe, the second connecting pipe, the communicating groove, the liquid flow groove, and the through groove, the crystals can be flushed after being scraped, so that they can be separated from the scraping box, making the cleaning effect of the crystals on the inner wall of the chemical reaction kettle better.

Description

Technical Field

[0001] The invention relates to chemical reactor technology, in particular to a chemical reactor. Background Art

[0002] Reactors are broadly understood as containers for physical or chemical reactions. Through the structural design and parameter configuration of the container, the heating, evaporation, cooling and low-speed mixing functions required by the process are realized. Reactors are widely used in petroleum, chemical, rubber, pesticide, dye, medicine, and food. They are pressure vessels used to complete processes such as vulcanization, nitration, hydrogenation, hydrocarbonization, polymerization, and condensation, such as reactors, reaction pots, decomposition pots, polymerization pots, etc.; the materials are generally carbon manganese steel, stainless steel, zirconium, nickel-based (Hastelloy, Monel, Inconel) alloys and other composite materials.

[0003] In the existing chemical reactor, a large number of crystals will be precipitated during the compound reaction due to temperature, compound concentration and other reasons, and some of the precipitated crystals are easy to adhere to the inner wall of the reactor. The crystals attached to the inner wall of the reactor will block the heat transfer in the water bath interlayer, causing the liquid in various places in the reactor to be heated unevenly, which will affect the overall reaction process.

[0004] The Chinese invention patent with the announcement number CN117548068B discloses a chemical raw material reactor, including a reactor shell, a top wall of which is fixedly connected to a feed pipe, a bottom of the reactor shell is fixedly connected to a discharge pipe, and a pressure balance hole is opened on the top wall of the reactor shell; a stirring shaft is rotatably connected to the top wall of the reactor shell, an air path cavity and a liquid path cavity are arranged inside the stirring shaft, and an air path slip ring is sleeved on the upper end of the stirring shaft; a scraper frame is vertically slidably connected to the inside of the stirring shaft, a piston cavity and a guide cavity are arranged inside the scraper frame, a telescopic sleeve is slidably connected between the piston cavity and the guide cavity, an exhaust cavity and a flushing cavity are arranged inside the telescopic sleeve, a plurality of scrapers are slidably connected inside the exhaust cavity, and a space is reserved between two adjacent scrapers. The exhaust gap, during its operation, scrapes the crystals attached to the inner wall of the reactor through multiple groups of staggered scrapers. However, during the scraping process, when the crystals adhere to the scraper, the working scraper is retracted and the working scraper is extended. Therefore, in this process, the crystals attached to the working scraper will be squeezed on the inner wall of the reactor by the working scraper. In order to fully scrape the crystals, the switching process of the scraper is relatively short. Even with the blowing of inert gas, it is still easy to be squeezed on the inner wall of the reactor by the working scraper, which makes it difficult to separate the scraped crystals from the scraper. Moreover, as the amount of crystal attachment increases, it will also hinder the normal operation of the scraper. Summary of the invention

[0005] The object of the present invention is to provide a chemical reaction kettle to solve the above-mentioned deficiencies in the prior art.

[0006] To achieve the above object, the present invention provides the following technical solution: A chemical reaction kettle, including a kettle body and an inner liner, a water bath interlayer is provided between the kettle body and the inner liner, a liquid inlet pipe and a liquid outlet pipe communicating with the water bath interlayer are provided outside the kettle body, an exhaust gas recovery box is provided on one side of the kettle body, and a gas pipe with a matching control valve is provided between the exhaust gas recovery box and the top of the kettle body. It is characterized in that a rotating shaft located in the inner liner is rotatably connected to the top of the kettle body, and stirring plates are provided outside the rotating shaft;

[0007] A connecting sleeve is fixedly connected to the outside of the rotating shaft, a connecting plate is fixedly connected to the outside of the connecting sleeve, a scraping box is installed outside the connecting plate, the scraping box is slidably connected to the inner wall of the inner liner, a through groove is provided on one side of the scraping box, when the rotating shaft drives the scraping box to rotate, the side of the through groove can scrape off the crystal blocks attached to the surface of the inner liner, a communicating groove is provided inside the rotating shaft, and a liquid passage groove communicating the scraping box with the communicating groove is provided inside the connecting plate. A two-way gear pump is installed outside the kettle body, the outside of the two-way gear pump is respectively communicated with a first connecting pipe and a second connecting pipe, and a rotary joint is fixedly connected to the top of the rotating shaft;

[0008] A driving mechanism is provided at the top of the kettle body, and the driving mechanism is used to drive the rotating shaft to rotate.

[0009] Further, the driving mechanism includes a bracket installed on the top of the kettle body, a driving motor is installed on the top of the bracket, gears are installed outside the rotating shaft and outside the output shaft of the driving motor, and the two gears mesh with each other.

[0010] Further, one end of the first connecting pipe is connected to the two-way gear pump, and the other end passes through the water bath interlayer and is fixedly connected to the upper rotating part of the rotary joint. The upper rotating part of the rotary joint is fixedly connected to the bracket, and the lower rotating part of the rotary joint is fixedly connected to the rotating shaft.

[0011] Further, one end of the second connecting pipe is connected to the two-way gear pump, and the other end passes through the water bath interlayer and is fixedly connected to the top of the inner wall of the inner liner.

[0012] Further, a transfer cavity is provided inside the connecting sleeve, crushing rollers are rotatably connected to the upper and lower ends of the inner side surface of the transfer cavity respectively, the two crushing rollers are driven by a motor, and the motor drives the two crushing rollers to rotate synchronously and in opposite directions. The two ends of the transfer cavity are respectively communicated with the liquid passage groove and the communicating groove.

[0013] Further, one end of the connecting plate away from the connecting sleeve is fixedly connected with a receiving plate. A receiving groove communicating with the liquid passage groove is formed on one side of the receiving plate away from the connecting plate. The end of the scraping box is fixedly connected with a sliding sleeve, and the sliding sleeve is slidably connected with the inner side surface of the receiving groove. Electric rods are fixedly installed at both the upper and lower ends inside the receiving plate, and the telescopic ends of the electric rods are fixedly connected with the scraping box.

[0014] Further, a sealing plate is installed on one side of the receiving plate close to the through groove. When the electric rod drives the scraping box to move and contact the receiving plate, the scraping box moves to the sealing plate to close the through groove.

[0015] Compared with the prior art, a chemical reactor provided by the present invention has the following beneficial effects:

[0016] 1. In this chemical reactor, by arranging a scraping box on the rotating shaft, the attached crystals can be scraped off during the rotation process. Moreover, through the mutual cooperation among the double gear pump, the first connecting pipe, the second connecting pipe, the communicating groove, the liquid passage groove, and the through groove, the crystals can be flushed after being scraped off, so that they can be separated from the scraping box, making the cleaning effect of the crystals on the inner wall of the chemical reactor better.

[0017] 2. In this chemical reactor, through the connecting sleeve, the transfer chamber, and the two crushing rollers arranged up and down in the transfer chamber, during the chemical reaction process that is prone to generating large - volume crystals, after the scraping box scrapes off the crystals, the crystals can be sucked in, pass through the crushing rollers, and be crushed into small - volume crystals, and finally be sprayed out from the end of the second connecting pipe and continue to be mixed in the reaction liquid. Therefore, large - particle crystals are not likely to exist during the reaction process, effectively avoiding the situation where the heat transfer of the water - bath interlayer is blocked due to the accumulation of a large number of large - particle crystals.

[0018] 3. In this chemical reactor, through the mutual cooperation among the receiving groove, the sliding sleeve, the receiving plate, and the electric rod, during the actual application process, the position of the scraping box can be adjusted according to actual needs, so that it can be separated from the inner wall of the inner tank in the non - use state, thereby effectively reducing its wear and effectively extending its service life.

[0019] 4. In this chemical reactor, through the setting of the sealing plate, after the scraping box is separated from the inner wall of the inner tank, the sealing plate can completely close the through groove, preventing the reaction liquid from entering its interior. Therefore, it is not necessary to clean its interior after the chemical reaction is completed, making the reactor more convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] To more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the accompanying drawings required for use in the embodiments. Obviously, the accompanying drawings in the following description are only some embodiments recorded in the present invention. For those of ordinary skill in the art, other accompanying drawings can also be obtained based on these drawings.

[0021] Figure 1 Schematic diagram of the overall structure provided by the embodiment of the present invention;

[0022] Figure 2 Schematic diagram of the internal structure of the kettle body provided by the embodiment of the present invention;

[0023] Figure 3 Schematic diagram of the longitudinal sectional structure of the kettle body provided by the embodiment of the present invention;

[0024] Figure 4 Provided by the embodiment of the present invention Figure 3 Schematic diagram of the enlarged structure at A in

[0025] Figure 5 Schematic diagram of the connection structure between the scraping box and the rotating shaft provided by the embodiment of the present invention;

[0026] Figure 6 Schematic diagram of the internal structure of the scraping box provided by the embodiment of the present invention;

[0027] Figure 7 Schematic diagram of the structure of the scraping box provided by the embodiment of the present invention.

[0028] Explanation of the reference numerals in the drawings:

[0029] 1. Kettle body; 101. Inner liner; 102. Water bath interlayer; 103. Exhaust gas recovery box; 104. Air pipe; 105. Liquid inlet pipe; 106. Liquid outlet pipe; 2. Rotating shaft; 21. Stirring plate; 3. Connecting sleeve; 31. Connecting plate; 32. Scraping box; 33. Through groove; 34. Communication groove; 35. Liquid flow groove; 36. Double - gear pump; 37. First connecting pipe; 38. Second connecting pipe; 39. Rotary joint; 4. Bracket; 41. Driving motor; 42. Gear; 5. Transfer cavity; 51. Crushing roller; 6. Accommodating plate; 61. Storage groove; 62. Sliding sleeve; 63. Electric rod; 64. Sealing plate. Detailed implementation manners

[0030] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the following will further introduce the present invention in detail in conjunction with the accompanying drawings.

[0031] Embodiment 1:

[0032] Please refer to Figures 1-7, a chemical reaction kettle, including a kettle body 1 and an inner tank 101. A water bath sandwich layer 102 is provided between the kettle body 1 and the inner tank 101. An inlet pipe 105 and an outlet pipe 106 communicating with the water bath sandwich layer 102 are provided outside the kettle body 1. An exhaust gas recovery box 103 is provided on one side of the kettle body 1. A gas pipe 104 with a cooperating control valve is provided between the exhaust gas recovery box 103 and the top of the kettle body 1. A rotating shaft 2 located in the inner tank 101 is rotatably connected to the top of the kettle body 1. A stirring plate 21 is provided outside the rotating shaft 2;

[0033] A connecting sleeve 3 is fixedly connected to the outside of the rotating shaft 2. A connecting plate 31 is fixedly connected to the outside of the connecting sleeve 3. A scraping box 32 is installed outside the connecting plate 31. The scraping box 32 is slidably connected to the inner wall of the inner tank 101. A through groove 33 is provided on one side of the scraping box 32. When the rotating shaft 2 drives the scraping box 32 to rotate, the side of the through groove 33 can scrape off the crystal blocks attached to the surface of the inner tank 101. A communicating groove 34 is provided inside the rotating shaft 2. A liquid passage groove 35 communicating the scraping box 32 and the communicating groove 34 is provided inside the connecting plate 31. A two-way gear pump 36 is installed outside the kettle body 1. The outside of the two-way gear pump 36 is respectively communicated with a first connecting pipe 37 and a second connecting pipe 38. A rotary joint 39 is fixedly connected to the top of the rotating shaft 2;

[0034] A driving mechanism is provided on the top of the kettle body 1, and the driving mechanism is used to drive the rotating shaft 2 to rotate.

[0035] In this embodiment, the driving mechanism includes a bracket 4 installed on the top of the kettle body 1. A driving motor 41 is installed on the top of the bracket 4. Gears 42 are installed outside the rotating shaft 2 and the output shaft of the driving motor 41, and the two gears 42 mesh with each other.

[0036] It should be noted that one end of the first connecting pipe 37 is connected to the two-way gear pump 36, and the other end passes through the water bath sandwich layer 102 and is fixedly connected to the upper rotating part of the rotary joint 39. The upper rotating part of the rotary joint 39 is fixedly connected to the bracket 4, and the lower rotating part of the rotary joint 39 is fixedly connected to the rotating shaft 2.

[0037] Furthermore, one end of the second connecting pipe 38 is connected to the two-way gear pump 36, and the other end passes through the water bath sandwich layer 102 and is fixedly communicated with the top of the inner wall of the inner tank 101.

[0038] By passing both the first connecting pipe 37 and the second connecting pipe 38 through the water bath sandwich layer 102, after the liquid in the reaction kettle flows in the first connecting pipe 37 and the second connecting pipe 38 and then returns to the inside of the inner tank 101, the temperature difference between it and the original liquid inside is relatively small, and it will not have an adverse impact on the overall reaction process.

[0039] During the working process, the driving motor 41 drives the gear 42 on its output shaft to rotate, causing another gear 42 to rotate and driving the rotating shaft 2 to rotate. The rotation of the rotating shaft 2 drives the stirring plate 21 to rotate, stirring and mixing the reaction liquid in the inner tank 101;

[0040] During the rotation of the rotating shaft 2, the connecting sleeve 3 and the connecting plate 31 are driven to rotate. The rotation of the connecting plate 31 drives the scraping box 32 to rotate. During the rotation of the scraping box 32, it slides along the inner wall of the inner tank 101 on the side of the through groove 33 on its surface, and scrapes the crystal blocks attached to its inner wall;

[0041] During the above process, the two-way gear pump 36 works, and pumps and sucks the liquid in the inner tank 101 through the second connecting pipe 38, making it transported from the first connecting pipe 37 to the communication groove 34, and finally discharged from the through groove 33. During the process of the liquid discharging from the through groove 33, it can wash the scraped crystals, separating them from the scraping box 32.

[0042] Embodiment Two:

[0043] Please refer to Figure 6 , on the basis of the above embodiment, this embodiment provides a technical solution: a transfer cavity 5 is provided inside the connecting sleeve 3. The upper and lower ends of the inner side surface of the transfer cavity 5 are respectively rotatably connected with crushing rollers 51. The two crushing rollers 51 are driven by a motor, and the motor drives the two crushing rollers 51 to rotate synchronously and reversely. The two ends of the transfer cavity 5 are respectively communicated with the liquid passage groove 35 and the communication groove 34.

[0044] It should be noted that two auxiliary gears that mesh with each other are provided outside the two crushing rollers 51. With the cooperation of the auxiliary gears, driving one of the crushing rollers 51 by the motor can make the two crushing rollers 51 rotate synchronously and reversely.

[0045] When carrying out the reaction of easily crystallizable liquid, larger crystal blocks are likely to condense during the reaction process. At this time, through the cooperation of the two-way gear pump 36 and the first connecting pipe 37, suction is generated at the through groove 33, and the scraped larger crystal blocks are sucked in. During the process of entering the communication groove 34, they can first pass between the two crushing rollers 51. During this process, the two crushing rollers 51 rotate synchronously and reversely, so that the larger crystal blocks passing between them can be crushed, making the volume of the crystals entering the communication groove 34 smaller, and finally sprayed out from the end of the second connecting pipe 38. Thus, it can not only effectively avoid the large-volume crystals from easily accumulating and hindering the heat conduction of the water bath sandwich layer 102, but also promote the mixing of various liquids in the reaction kettle, making the reaction effect of the liquid better.

[0046] Embodiment Three:

[0047] Please refer toFigures 5-7 , on the basis of the above embodiment, this embodiment provides a technical solution: one end of the connecting plate 31 away from the connecting sleeve 3 is fixedly connected with a receiving plate 6. A receiving groove 61 communicating with the liquid passage groove 35 is formed on one side of the receiving plate 6 away from the connecting plate 31. One end of the scraping box 32 is fixedly connected with a sliding sleeve 62. The sliding sleeve 62 is slidably connected with the inner side surface of the receiving groove 61. Electric rods 63 are fixedly installed at both the upper and lower ends inside the receiving plate 6. The telescopic ends of the electric rods 63 are fixedly connected with the scraping box 32.

[0048] It should be noted that the electric rod 63 is selected to be waterproof so that it is not easily damaged when used in the reaction kettle.

[0049] During the reaction of compounds that are not prone to crystallization, the scraping box 32 is driven by the electric rod 63 to move away from the inner wall of the inner tank 101. Thus, during the rotation of the rotating shaft 2, the scraping box 32 will not contact the inner wall of the inner tank 101 when rotating, which can effectively reduce the wear of the scraping box 32 and effectively extend the service life of the scraping box 32. During the reaction of compounds prone to crystallization, the scraping box 32 is driven by the electric rod 63 to closely fit the inner wall of the inner tank 101, so that the scraping box 32 can effectively scrape the crystals attached to the inner wall of the inner tank 101 during the rotation along with the rotating shaft 2.

[0050] Embodiment 4:

[0051] Please refer to Figure 5 , on the basis of the above embodiment, this embodiment provides a technical solution: a sealing plate 64 is installed on the side of the receiving plate 6 close to the through groove 33. When the electric rod 63 drives the scraping box 32 to move into contact with the receiving plate 6, the scraping box 32 moves to the sealing plate 64 to close the through groove 33.

[0052] When the electric rod 63 drives the scraping box 32 to move away from the inner wall of the inner tank 101 and come into contact with the surface of the receiving plate 6, at this time, the sealing plate 64 can completely close the through groove 33, so that when reacting compounds that are not prone to crystallization, the through groove 33 is in a closed state. During its rotation, the liquid in the reaction kettle will not enter its interior, thus not affecting the reaction of the compounds. At the same time, it also makes it difficult for the reactants to enter its interior, so that when reacting other compounds subsequently, there is no need to clean its interior, which is convenient for the compound reaction work.

[0053] Only some exemplary embodiments of the present invention are described by way of illustration above. Without doubt, for those of ordinary skill in the art, the described embodiments can be modified in various different ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and description are illustrative in nature and should not be construed as limiting the protection scope of the claims of the present invention.

Claims

1. A chemical reaction kettle, comprising a kettle body (1) and an inner tank (101). A water bath interlayer (102) is arranged between the kettle body (1) and the inner tank (101). A liquid inlet pipe (105) and a liquid outlet pipe (106) communicating with the water bath interlayer (102) are arranged outside the kettle body (1). An exhaust gas recovery box (103) is arranged on one side of the kettle body (1). A gas pipe (104) cooperating with a control valve is arranged between the exhaust gas recovery box (103) and the top of the kettle body (1). It is characterized in that, A rotating shaft (2) is rotatably connected to the top of the kettle body (1) and is located inside the inner liner (101). A stirring plate (21) is arranged outside the rotating shaft (2). A connecting sleeve (3) is fixedly connected to the outside of the rotating shaft (2). A connecting plate (31) is fixedly connected to the outside of the connecting sleeve (3). A scraping box (32) is installed outside the connecting plate (31). The scraping box (32) is slidably connected to the inner wall of the inner liner (101). A through groove (33) is formed on one side of the scraping box (32). When the rotating shaft (2) drives the scraping box (32) to rotate, the side of the through groove (33) can scrape off the crystal blocks attached to the surface of the inner liner (101). A communication groove (34) is formed inside the rotating shaft (2). A liquid passage groove (35) communicating the scraping box (32) and the communication groove (34) is formed inside the connecting plate (31). A two-way gear pump (36) is installed outside the kettle body (1). The two-way gear pump (36) is externally connected to a first connecting pipe (37) and a second connecting pipe (38) respectively. The top of the rotating shaft (2) is fixedly connected to a rotary joint (39). One end of the first connecting pipe (37) is connected to the two-way gear pump (36), and the other end passes through the water bath interlayer (102) and is fixedly connected to the upper rotating part of the rotary joint (39). One end of the second connecting pipe (38) is connected to the two-way gear pump (36), and the other end passes through the water bath interlayer (102) and is fixedly connected and communicated with the top of the inner wall of the inner liner (101). A transfer cavity (5) is formed inside the connecting sleeve (3). Crushing rollers (51) are rotatably connected to the upper and lower ends of the inner side surface of the transfer cavity (5) respectively. The two crushing rollers (51) are driven by a motor, and the motor drives the two crushing rollers (51) to rotate synchronously and in opposite directions. The two ends of the transfer cavity (5) are respectively communicated with the liquid passage groove (35) and the communication groove (34). A driving mechanism is arranged at the top of the kettle body (1), and the driving mechanism is used to drive the rotating shaft (2) to rotate.

2. A chemical reactor according to claim 1, characterized in that, The driving mechanism includes a bracket (4) installed at the top of the kettle body (1). A driving motor (41) is installed at the top of the bracket (4). Gears (42) are installed outside the rotating shaft (2) and the output shaft of the driving motor (41) respectively. The two gears (42) are meshed with each other.

3. A chemical reactor according to claim 2, characterized in that, The upper rotating part of the rotary joint (39) is fixedly connected to the bracket (4), and the lower rotating part of the rotary joint (39) is fixedly connected to the rotating shaft (2).

4. A chemical reactor according to claim 3, characterized in that, One end of the connecting plate (31) far away from the connecting sleeve (3) is fixedly connected to a receiving plate (6). A receiving groove (61) communicating with the liquid passage groove (35) is formed on one side of the receiving plate (6) far away from the connecting plate (31). A sliding sleeve (62) is fixedly connected to the end of the scraping box (32). The sliding sleeve (62) is slidably connected to the inner side surface of the receiving groove (61). Electric rods (63) are fixedly installed at the upper and lower ends inside the receiving plate (6). The telescopic ends of the electric rods (63) are fixedly connected to the scraping box (32).

5. A chemical reactor according to claim 4, characterized in that, A sealing plate (64) is installed on one side of the accommodating plate (6) close to the through groove (33). When the electric rod (63) drives the scraping box (32) to move and contact the accommodating plate (6), the scraping box (32) moves to the sealing plate (64) to close the through groove (33).

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