Reflux reaction kettle

Abstract

The utility model relates to a reflux reaction kettle which comprises a kettle body, a stirring mechanism is arranged in the kettle body, a heating layer is arranged on the outer side of the kettle body, a reflux assembly is arranged on the kettle body and comprises an evaporation pipe, a reflux pipe and a cooling box, the cooling box is arranged on the upper side of the kettle body, and the cooling box is connected with the kettle body through the evaporation pipe and the reflux pipe. A cooling pipe is arranged in the cooling box, two ends of the cooling pipe are connected with the outer side cooler, a guide plate is arranged on the upper side of the cooling pipe in the cooling box, a condensation sheet group is arranged in the cooling box, and a tail gas treatment mechanism is arranged on the upper side of the cooling box; after materials are put into the kettle body, the stirring mechanism stirs the materials, the heating mechanism heats the materials, when the materials are heated till backflow occurs, material steam is conveyed to the cooling box through the evaporation pipe and is cooled through the cooling pipe, part of the material steam is condensed and flows back, the rest of the material steam is guided by the guide plate, condensed by the condensation piece set and then flows back, and liquid after backflow is conveyed back to the kettle body through the backflow pipe. The device has the effects of sufficient condensation and backflow and relatively good backflow.

Description

Technical Field

[0001] The present application relates to the field of reactors, and in particular to a reflux reactor. Background Art

[0002] The broad understanding of a reactor is a container 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 can be achieved. When preparing tetrachlorophthalic acid, reflux is required in the reactor.

[0003] In the related art, reference can be made to the Chinese utility model patent with authorization announcement number CN209237913U, which discloses a reflux reactor with a heating function, including a reactor body, the top of the reactor body is connected to a condensation tower through a condensation hole, a plurality of vertical heating half-tubes distributed in a circle around the central axis of the reactor body are arranged on the outer wall of the reactor body, a heating box is arranged on one side of the reactor body, a groove is arranged at the center of the top surface of the rubber column, and the lower end of the support column is located in the groove of the rubber column, and a vertical shock-absorbing spring is arranged in the fixed cylinder; the heating half-tubes are evenly distributed on the side wall of the reactor body, so that the reactor body can be evenly heated; by using rubber columns and shock-absorbing springs, the vibration caused by the reflux liquid reflux impacting the reactor body is reduced, thereby extending the service life.

[0004] In the above-mentioned related technologies, when the reflux temperature is high, condensation is performed only by relying on a condenser, and the cooling effect is poor. The poor reflux effect leads to insufficient reaction and a long reaction time. Utility Model Content

[0005] In order to solve the problem that when the reflux temperature is high, the cooling effect is poor when condensation is performed only by a condenser, the present application provides a reflux reactor.

[0006] A reflux reactor provided in this application adopts the following technical solution:

[0007] A reflux reactor comprises a reactor body, wherein the reactor body is provided with a feed port and a discharge port, the reactor body is provided with a stirring mechanism, the outside of the reactor body is provided with a heating layer, the heating layer is connected to the outside heating mechanism, the reactor body is provided with a reflux assembly, the reflux assembly comprises an evaporating tube, a reflux tube and a cooling box, the cooling box is arranged on the upper side of the reactor body, the cooling box is connected to the reactor body through the evaporating tube and the reflux tube, a cooling tube is arranged in the cooling box, both ends of the cooling tube are connected to the outside cold machine, a guide plate is arranged in the cooling box on the upper side of the cooling tube, a condensing plate group is arranged in the cooling box on the upper side of the guide plate, and an exhaust gas treatment mechanism is arranged on the upper side of the cooling box.

[0008] By adopting the above technical scheme, after the material is put into the kettle, the stirring mechanism stirs while the heating mechanism heats the heating layer. When the material is heated until reflux occurs, the material vapor is transported to the cooling box through the evaporator tube, first cooled by the cooling tube, partially condensed and refluxed, and the remaining part is guided by the guide plate, condensed by the condensing plate group and then refluxed. The refluxed liquid is transported back to the kettle through the reflux pipe, the condensation reflux is sufficient, and the reflux effect is good.

[0009] Optionally, the guide plates are arranged in two pieces at an angle and staggered up and down, and convex strips are arranged on the guide plates.

[0010] By adopting the above technical solution, the material vapor is transported through the guide plate, partially condensed after contacting the guide plate, and refluxed along the convex strips on the guide plate. The convex strips also increase the condensation area, and the condensation effect is better.

[0011] Optionally, a lower liquid port is provided on one side of the guide plate, and a guide plate is provided in the cooling box at the lower liquid port of the guide plate.

[0012] By adopting the above technical solution, after the material vapor is condensed by the condensing plate group, the reflux liquid flows back through the lower liquid port of the guide plate and then flows back through the guide plate at the lower liquid port, and the diversion operation is relatively convenient.

[0013] Optionally, the condenser plate group includes a plurality of first condenser plates and a second condenser plate, the first condenser plates and the second condenser plates are both V-shaped, a plurality of first condenser plates are provided and are distributed parallel to each other, and the second condenser plates are arranged opposite to the first condenser plates and are distributed alternately above and below the first condenser plates.

[0014] By adopting the above technical solution, the material vapor is first condensed by the first condensing plate, and the remaining is transported along both sides of the first condensing plate to the second condensing plate for secondary condensation, and the effect of the two condensations is better.

[0015] Optionally, a lower liquid hole is provided on the first condensing plate.

[0016] By adopting the above technical solution, the condensate on the second condenser sheet flows through both sides of the second condenser sheet to the upper side of the first condenser sheet and flows down through the lower liquid hole, and the condensate is not easy to accumulate on the first condenser sheet.

[0017] Optionally, protrusions are provided on the first condensing sheet and the second condensing sheet.

[0018] By adopting the above technical solution, the protrusion increases the condensation area of ​​the first condensation sheet and the second condensation sheet, and the condensation effect is better.

[0019] Optionally, the stirring mechanism includes a stirring shaft and stirring blades, a motor is arranged on the top of the kettle body, the stirring shaft is rotatably installed in the kettle body and connected to the output shaft of the motor, and the stirring blades are arranged on the circumferential side wall of the stirring shaft.

[0020] By adopting the above technical solution, during stirring, the motor drives the stirring shaft and then drives the stirring blades to rotate, so as to stir the materials, and the stirring effect is better.

[0021] Optionally, a dispersion piece is provided on the lower side of the stirring shaft, and the dispersion piece includes a sliding rod and a scraper. A connecting rod is provided on the stirring shaft, and one end of the sliding rod is slidably installed on the connecting rod. A spring is provided on the connecting rod, and one end of the spring is connected to the sliding rod. The scraper is provided at one end of the sliding rod.

[0022] By adopting the above technical solution, when there are a lot of solids in the kettle, the solids sink to the bottom and are difficult to stir with the stirring blades. At this time, the stirring shaft drives the connecting rod and then drives the sliding rod to rotate, and the scraper at one end of the sliding rod contacts the solids. At this time, the spring is compressed. When the scraper stirs up part of the solids, the spring presses the scraper tightly, and the scraper has a better dispersion effect on the material, while reducing the probability of damage to the scraper.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. After the material is put into the kettle, the stirring mechanism stirs it, and the heating mechanism heats the heating layer. When the material is heated to reflux, the material vapor is transported to the cooling box through the evaporation pipe, cooled by the cooling pipe, partially condensed and refluxed, and the remaining part is guided by the guide plate, condensed by the condensing sheet group and refluxed. The refluxed liquid is transported back to the kettle through the reflux pipe, and the reflux effect is better;

[0025] 2. The material vapor is first condensed by the first condenser, and the remaining is transported along both sides of the first condenser to the second condenser for secondary condensation. The effect of the two condensations is better;

[0026] 3. The stirring shaft drives the connecting rod and then drives the sliding rod to rotate. The scraper at one end of the sliding rod contacts the solid matter. At this time, the spring is compressed. When the scraper stirs up some of the solid matter, the spring presses the scraper tightly, and the scraper has a better dispersion effect on the material. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a three-dimensional structural schematic diagram of this application.

[0028] Figure 2 It is a cross-sectional view along the axial direction of the stirring shaft of the present application.

[0029] Figure 3It is an enlarged cross-sectional view of part A of the present application.

[0030] Figure 4 It is an enlarged cross-sectional view of part B of the present application.

[0031] Figure 5 It is an enlarged cross-sectional view of part C of the present application.

[0032] Those skilled in the art will appreciate that the elements in the drawings are shown for simplicity and clarity and are not necessarily drawn to scale. For example, the size and position of some elements in the drawings may be magnified relative to other elements to help improve understanding of the embodiments of the present invention.

[0033] 1. Agitator; 2. Refrigerant; 3. Cooling box; 4. Cooling chamber; 5. Cooling plate; 6. Exhaust treatment mechanism; 7. Exhaust pipe; 8. Treatment box; 9. Condenser plate group; 10. First condenser plate; 11. Lower liquid hole; 12. Second condenser plate; 13. Protrusion; 14. Spring; 15. Disperser; 16. Sliding rod; 17. Scraper; 18. Connecting rod; 19. Sliding hole; 20. Spring. DETAILED DESCRIPTION

[0034] The present application is further described in detail below in conjunction with the accompanying drawings.

[0035] The present application embodiment discloses a reflux reactor, referring to Figure 1 and Figure 2 , including a kettle body 1, a feed inlet 11 is provided at the top of the kettle body 1, a discharge port 12 is provided at the bottom of the kettle body 1, a stirring mechanism 2 is provided in the kettle body 1, the stirring mechanism 2 includes a stirring shaft 21 and a stirring blade 22, a motor 23 is provided at the top of the kettle body 1, the stirring shaft 21 is vertically rotatably installed in the kettle body 1 and is connected to the output shaft of the motor 23, the stirring blade 22 is arranged on the circumferential outer wall of the stirring shaft 21, a heating layer 13 is provided on the circumferential side wall of the kettle body 1, a heating coil 14 is provided in the heating layer 13, the heating coil 14 is connected to the outer heating mechanism, the material is put into the kettle body 1 through the feed inlet 11, the stirring motor 23 drives the stirring shaft 21 and then drives the stirring blade 22 to rotate, so as to stir the material, the outer heating mechanism transports the heating medium to the heating coil 14, and the heating coil 14 of the heating layer 13 heats the kettle body 1.

[0036] Reference Figure 1 and Figure 2A mounting frame 15 is provided on the top of the kettle body 1, and a reflux assembly 3 is provided on the kettle body 1 located on the mounting frame 15. The reflux assembly 3 includes an evaporation pipe 31, a reflux pipe 32 and a cooling box 33. The cooling box 33 is vertically arranged on the mounting frame 15, and a cooling chamber 331 is arranged in the cooling box 33. Both ends of the evaporation pipe 31 are respectively connected to the kettle body 1 and one side of the cooling box 33. The reflux pipe 32 is arranged at the bottom of the cooling box 33 and connected to the kettle body 1. The cooling box 33 is located in the cooling chamber 331 and is provided with a cooling pipe 34. The cooling pipe 34 is distributed in an annular shape, and both ends of the cooling pipe 34 are connected to the outer cold machine. When the material is heated to reflux, the material vapor is transported to the cooling chamber 331 of the cooling box 33 through the evaporation pipe 31, and part of it is cooled by the cooling pipe 34 and condensed and refluxed.

[0037] Reference Figure 2 An air outlet 332 is provided at the top of the cooling box 33, and an exhaust gas treatment mechanism 4 is provided at the air outlet 332 of the cooling box 33. The exhaust gas treatment mechanism 4 includes an air outlet pipe 41 and a treatment box 42. The air outlet pipe 41 is connected to the cooling box 33 at the air outlet 332, and the treatment box 42 is arranged on one side of the mounting frame 15 and connected to the air outlet pipe 41.

[0038] Reference Figure 2 and Figure 3 A guide plate 35 is obliquely arranged at the upper side of the cooling pipe 34 in the cooling box 33. Two guide plates 35 are arranged and are staggered up and down. A convex strip 351 is arranged on the lower side of the guide plate 35. The convex strip 351 is distributed along the length direction of the guide plate 35. The material vapor is transported through the guide plate 35, and part of it is condensed after contacting the guide plate 35, and refluxes along the convex strip 351 on the guide plate 35. The convex strip 351 also increases the condensation area, and the condensation effect is better.

[0039] Reference Figure 4A condensation sheet group 5 is arranged in the cooling chamber 331 of the cooling box 33 and on the upper side of the guide plate 35. The condensation sheet group 5 includes a first condensation sheet 51 and a second condensation sheet 52. The first condensation sheet 51 and the second condensation sheet 52 are both distributed along the width direction of the cooling box 33. The first condensation sheet 51 and the second condensation sheet 52 are both arranged in a V shape. The first condensation sheet 51 is provided with a plurality of condensation sheets and arranged in parallel with each other. The second condensation sheet 52 is relatively arranged on the upper side of the first condensation sheet 51. The second condensation sheet 52 and the first condensation sheet 51 are staggered up and down. The material vapor is first condensed by the first condensation sheet 51, and the remaining is transported to the second condensation sheet 52 along both sides of the first condensation sheet 51 for secondary condensation. The effect of the two condensations is better. The first condensation sheet 51 and the second condensation sheet 52 are provided with a plurality of protrusions 521 on the side facing downward. The protrusions 521 increase the condensation area of ​​the first condensation sheet 51 and the second condensation sheet 52, and the condensation effect is better. The first condenser sheet 51 is located in the middle position and is provided with a lower liquid hole 511 downwardly, and the lower liquid hole 511 is arranged along the length direction of the first condenser sheet 51. The condensate on the second condenser sheet 52 flows through both sides of the second condenser sheet 52 to the upper side of the first condenser sheet 51, and flows down through the lower liquid hole 511. The condensate is not easy to accumulate on the first condenser sheet 51.

[0040] Reference Figure 5 A dispersing member 6 is provided at the lower end of the stirring shaft 21, and the dispersing member 6 includes a sliding rod 61 and a scraper 62. A connecting rod 63 is provided on the circumferential side wall of the stirring shaft 21. The connecting rod 63 is provided with a sliding hole 64 at the end away from the stirring shaft 21. A spring 65 is provided at the sliding hole 64 of the connecting rod 63. One end of the sliding rod 61 is slidably installed at the sliding hole 64 of the connecting rod 63 and is connected to the end of the spring 65 away from the stirring shaft 21. The scraper 62 is provided at the sliding rod 61 away from the spring 65. At one end, the end of the scraper 62 facing away from the sliding rod 61 is in contact with the inner wall of the kettle body 1. When there are more solids in the kettle body 1 and the solids sink to the bottom, it is difficult for the stirring blade 22 to stir them. At this time, the stirring shaft 21 drives the connecting rod 63 and then drives the sliding rod 61 to rotate. The scraper 62 at one end of the sliding rod 61 contacts the solids. At this time, the spring 65 is compressed. When the scraper 62 stirs up some of the solids, the spring 65 presses the scraper 62 tightly. The scraper 62 has a better dispersion effect on the material and reduces the probability of damage to the scraper 62.

[0041] Reference Figure 3The guide plate 35 is provided with a lower liquid port 352 at the connection with the cooling box 33. There are several lower liquid ports 352 and they are arranged along the length direction of the guide plate 35. The cooling box 33 is located on the inner wall and a guide plate 36 is vertically provided at the lower side of the lower liquid port 352 of the guide plate 35. After the material vapor is condensed by the condensing plate group 5, the reflux liquid refluxes through the lower liquid port 352 of the guide plate 35 and the guide plate 36 at the lower liquid port 352. The diversion operation is relatively convenient. The refluxed liquid is transported back to the kettle body 1 through the reflux pipe 32. The condensation reflux is sufficient and the reflux effect is good.

[0042] The implementation principle of a reflux reactor in an embodiment of the present application is as follows: materials are put into the reactor body 1, heated by a heating mechanism, and the stirring shaft 21 drives the stirring blades 22 to stir. When heated to reflux, the material vapor is transported to the cooling chamber 331 of the cooling box 33, part of which is cooled by the cooling pipe 34 and condensed and refluxed, and then transported through the guide plate 35, and part of which is condensed after contacting the guide plate 35, refluxed along the convex strip 351, and finally condensed by the first condensing plate 51 and the second condensing plate 52, and refluxed to the reactor body 1.

[0043] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A reflux reactor, comprising a reactor body (1), wherein the reactor body (1) is provided with a feed inlet (11) and a discharge outlet (12), wherein a stirring mechanism (2) is provided inside the reactor body (1), and a heating layer (13) is provided outside the reactor body (1), wherein the heating layer (13) is connected to the outside heating mechanism, characterized in that: The kettle body (1) is provided with a reflux component (3), the reflux component (3) comprising an evaporating pipe (31), a reflux pipe (32) and a cooling box (33), the cooling box (33) being provided on the upper side of the kettle body (1), the cooling box (33) being connected to the kettle body (1) via the evaporating pipe (31) and the reflux pipe (32), a cooling pipe (34) being provided in the cooling box (33), both ends of the cooling pipe (34) being connected to an external cooling machine, a guide plate (35) being provided in the cooling box (33) on the upper side of the cooling pipe (34), a condensing sheet group (5) being provided in the cooling box (33) on the upper side of the guide plate (35), and an exhaust gas treatment mechanism (4) being provided on the upper side of the cooling box (33).

2. A reflux reactor according to claim 1, characterized in that: The guide plates (35) are provided in two pieces at an angle and staggered up and down, and the guide plates (35) are provided with convex strips (351).

3. A reflux reactor according to claim 1, characterized in that: A lower liquid port (352) is provided on one side of the guide plate (35), and a guide plate (36) is provided in the cooling box (33) at the lower liquid port (352) of the guide plate (35).

4. A reflux reactor according to claim 1, characterized in that: The condenser sheet group (5) comprises a plurality of first condenser sheets (51) and second condenser sheets (52), wherein the first condenser sheets (51) and the second condenser sheets (52) are both V-shaped, a plurality of first condenser sheets (51) are provided and are arranged parallel to each other, and the second condenser sheets (52) are arranged opposite to the first condenser sheets (51) and are arranged in an upper and lower staggered manner with respect to the first condenser sheets (51).

5. A reflux reactor according to claim 4, characterized in that: The first condensing sheet (51) is provided with a lower liquid hole (511).

6. A reflux reactor according to claim 4, characterized in that: The first condensing sheet (51) and the second condensing sheet (52) are provided with protrusions (521).

7. A reflux reactor according to claim 1, characterized in that: The stirring mechanism (2) comprises a stirring shaft (21) and stirring blades (22); a motor (23) is arranged on the top of the kettle body (1); the stirring shaft (21) is rotatably mounted in the kettle body (1) and connected to an output shaft of the motor (23); and the stirring blades (22) are arranged on the circumferential side wall of the stirring shaft (21).

8. A reflux reactor according to claim 7, characterized in that: A dispersion member (6) is arranged at the lower side of the stirring shaft (21), and the dispersion member (6) comprises a sliding rod (61) and a scraper (62). A connecting rod (63) is arranged on the stirring shaft (21), and one end of the sliding rod (61) is slidably mounted on the connecting rod (63). A spring (65) is arranged on the connecting rod (63), and one end of the spring (65) is connected to the sliding rod (61). The scraper (62) is arranged at one end of the sliding rod (61).

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