CN220780350U - Multi-temperature-control reaction kettle - Google Patents

Abstract

The utility model discloses a multi-temperature-control reaction kettle, which belongs to the technical field of chemical reaction equipment and comprises a reaction kettle body (1), wherein a first jacket (3) is sleeved at the outer bottom of the reaction kettle body (1), a second jacket (4) is sequentially sleeved at the outer side of the reaction kettle body (1) from bottom to top, cavities (5) are arranged between the interiors of the first jacket (3) and the second jacket (4) and the outer surface of the reaction kettle body (1), an input port (6) and an output port (7) which are communicated with the cavities (5) are formed in the first jacket (3) and the second jacket (4), a conveying pipeline is arranged between the input port (6) and the output port (7), and a temperature control device is arranged on the conveying pipeline.

Description

Multi-temperature-control reaction kettle

Technical Field

The utility model belongs to the technical field of chemical reaction equipment, and particularly relates to a multi-temperature control reaction kettle for heating or cooling parts with different heights of the reaction kettle in a sectional manner.

Background

The reaction kettle is a pressure vessel for completing the technological processes of vulcanization, nitration, hydrogenation, hydrocarbylation, polymerization, condensation and the like, is widely applied to the fields of petroleum, chemical industry, rubber, pesticides, fuels, medicines, foods and the like, and mainly comprises a kettle body, a kettle cover, a jacket, a stirrer, a transmission device, a shaft seal device, a support and the like. Wherein, a heating medium or a cooling medium can be introduced into the jacket to heat or cool the reaction system in the reaction kettle, effectively control the temperature of the reaction system, promote the reaction and improve the yield and the product quality. However, the existing jackets are of an integrated structure and are arranged outside the reaction kettle, and after heating or cooling media are introduced, the whole reaction kettle can be regulated in temperature, and the reaction kettle cannot be regulated in sections along with the height of accumulated materials in the reaction kettle, so that energy waste is easily caused.

The utility model patent with publication number of CN211677730U discloses a sectional cooling reaction kettle, which comprises a reaction kettle body 2, a motor 4, a speed reducer 3 and a jacket assembly; the jacket assembly at least comprises a bottom jacket 7, a first side jacket 6 and a second side jacket 5, wherein the bottom jacket 7 has a U-shaped structure; the first side jacket 6 is adjacent to the bottom jacket 7 and is in a cylindrical structure with an upper opening and a lower opening; the second side jacket 5 is positioned above the first side jacket 6 and is in a cylindrical structure with an upper opening and a lower opening; the bottom jacket 7, the first side jacket 6 and the second side jacket 5 are spaced apart from each other at the same distance.

The sectional cooling reaction kettle solves the problems that the reaction kettle can synchronously adjust and set the heating range of the jacket according to the amount of reaction raw materials in the kettle body, but the reaction kettle has simple structure and function, does not consider the problems of how to introduce and discharge heating or cooling media in the jacket, and does not consider the problems of how to realize the internal heating or the recycling of the cooling media in the jacket in order to reduce the production cost, save energy resources.

Disclosure of Invention

The utility model aims to solve the technical problems that most of reaction kettle jackets in the prior art are of an integrated structure, the reaction kettles cannot be subjected to sectional temperature adjustment along with different heights of materials piled up in the reaction kettles, how heating or cooling mediums in the jackets are fed, discharged, recycled and the like are not considered, and provides a multi-temperature control reaction kettle capable of carrying out sectional temperature adjustment on parts with different heights of the reaction kettles, so that the problems of how the heating or cooling mediums in the jackets are fed, discharged and recycled are solved.

In order to solve the technical problems, the utility model provides a multi-temperature-control reaction kettle, which comprises a reaction kettle body, wherein a stirring device is arranged in the reaction kettle body, a first jacket is sleeved at the outer bottom of the reaction kettle body, 2-5 second jackets are sequentially sleeved at the outer side of the reaction kettle body from bottom to top, the first jackets and the second jackets are all of hollow structures, cavities are arranged between the inner parts of the first jackets and the outer surfaces of the reaction kettle body, an input port and an output port which are communicated with the cavities are formed in the first jackets and the second jackets, a conveying pipeline is arranged between the input port and the output port, and a temperature control device is arranged on the conveying pipeline.

As a further improvement of the present utility model, the inlet is located at the lower end of the jacket, the outlet is located at the upper end of the jacket, and the level of the inlet is lower than the level of the outlet.

As a further improvement measure of the present utility model, the above-mentioned conveying pipeline includes a first conveying pipeline respectively communicated with the input ports, and a second conveying pipeline respectively communicated with the output ports, a third conveying pipeline is communicated between the first conveying pipelines, a fourth conveying pipeline is communicated between the second conveying pipelines, and a fifth conveying pipeline is communicated between the third conveying pipeline and the fourth conveying pipeline.

As a further improvement measure of the present utility model, the temperature control device includes a heater and a first temperature sensor, which are disposed on the fifth conveying pipeline, the fifth conveying pipeline is further communicated with a storage tank and a filter, the filter is located between the storage tank and the heater, the filter is communicated with an output pipeline, and the output pipeline is provided with a first valve.

As a further improvement measure of the present utility model, a sixth conveying pipeline is communicated between the fifth conveying pipeline and the third conveying pipeline, which are located between the filter and the heater, a seventh conveying pipeline is communicated between the fifth conveying pipeline and the fourth conveying pipeline, which are located between the filter and the heater, the sixth conveying pipeline is communicated with the seventh conveying pipeline, and the temperature control device further comprises a cooler and a second temperature sensor, which are arranged on the seventh conveying pipeline.

As a further improvement measure of the present utility model, the first conveying pipeline and the second conveying pipeline are both provided with second valves, one end of the fifth conveying pipeline, which is communicated with the heater, is provided with a third valve, one end of the fifth conveying pipeline, which is communicated with the fourth conveying pipeline, is provided with a fourth valve, the sixth conveying pipeline is provided with a fifth valve, and a seventh conveying pipeline, which is positioned between the cooler and the fifth conveying pipeline, is provided with a sixth valve.

As a further improvement measure of the utility model, the first jacket and the second jacket are respectively internally provided with a liquid level sensor, an eighth conveying pipeline is communicated between the storage box and the fifth conveying pipeline, a seventh valve is arranged on the eighth conveying pipeline, and the seventh valve is connected with the liquid level sensor.

As a further improvement measure of the utility model, the stirring device comprises a stirring shaft and a driving motor for driving the stirring shaft to rotate, wherein the driving motor is arranged at the outer top of the reaction kettle body, a first opening for the stirring shaft to pass through is formed in the top of the reaction kettle body, and stirring paddles are arranged at one end part of the stirring shaft, which is positioned in the reaction kettle body.

As a further improvement measure of the utility model, the top of the reaction kettle body is also provided with a second opening and a third opening, a water spraying joint is arranged in the second opening, an air spraying joint is arranged in the third opening, and the bottom of the reaction kettle body is provided with a water outlet.

As a further improvement measure of the utility model, the top of the reaction kettle body is also provided with an observation hole.

Compared with the prior art, the utility model has the beneficial effects that: 1. according to the utility model, the first jacket is arranged at the outer bottom of the reaction kettle body, 2-5 second jackets are arranged at the outer side of the reaction kettle, the jackets with corresponding heights can be opened according to the height of materials piled up in the reaction kettle so as to be filled with heating or cooling media, and the parts of the reaction kettle body with different heights are heated or cooled in a segmented manner, so that the waste of energy sources is reduced, and the practicability of the reaction kettle is improved; 2. according to the utility model, through arranging the conveying pipelines, the conveying pipelines are respectively connected with the input port and the output port on the jacket, and arranging the valves on the conveying pipelines, not only is the flow area of the heating medium and the cooling medium in the jacket separated, but also the problem of how to introduce, discharge and recycle the heating medium or the cooling medium in the jacket is solved, the efficiency of temperature control and regulation of the reaction kettle is improved, the production cost is reduced, and the energy resource is saved; 3. according to the utility model, the inside of the reaction kettle body is polished by the lenses, and the water spraying connector and the air spraying connector are arranged at the top of the reaction kettle, so that the reaction kettle body is cleaned.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

FIG. 2 is a schematic diagram of the heating pipeline structure of the reaction kettle body in the utility model.

FIG. 3 is a schematic diagram of the cooling pipeline structure of the reaction kettle body.

FIG. 4 is a schematic structural view of a reaction vessel body in the present utility model.

Reference numerals illustrate: 1-reaction kettle body, 3-first jacket, 4-second jacket, 5-cavity, 6-input port, 7-output port, 8-first conveying pipeline, 9-second conveying pipeline, 10-third conveying pipeline, 11-fourth conveying pipeline, 12-fifth conveying pipeline, 13-heater, 14-first temperature sensor, 15-storage tank, 16-filter, 17-output pipeline, 18-first valve, 19-sixth conveying pipeline, 20-seventh conveying pipeline, 21-cooler, 22-second valve, 23-third valve, 24-fourth valve, 25-fifth valve, 26-sixth valve, 28-eighth conveying pipeline, 29-seventh valve, 30-stirring shaft, 31-driving motor, 32-stirring slurry, 33-water spray joint, 34-air spray joint, 35-discharge port, 36-observation hole, 37-second temperature sensor.

Detailed Description

The utility model is further described below with reference to the accompanying drawings.

The present utility model will be described in further detail with reference to the drawings and examples, in order to make the objects, technical solutions and advantages of the present utility model more apparent. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model.

On the contrary, the utility model is intended to cover any alternatives, modifications, equivalents, and variations as may be included within the spirit and scope of the utility model as defined by the appended claims. Further, in the following detailed description of the present utility model, certain specific details are set forth in order to provide a better understanding of the present utility model. The present utility model will be fully understood by those skilled in the art without the details described herein.

The multi-temperature-control reaction kettle shown in fig. 4 comprises a reaction kettle body 1, wherein an observation hole 36 for observing the reaction condition of materials is respectively formed in the upper end of the reaction kettle body 1, a feeding hole for placing the materials is formed in the upper end of the reaction kettle body 1, and a discharging hole 35 for discharging the materials after the reaction is completed is formed in the lower end of the reaction kettle body 1.

The inside of reation kettle body 1 is provided with agitating unit, and agitating unit includes (mixing) shaft 30 to and be used for driving (mixing) shaft 30 pivoted driving motor 31, driving motor 31 sets up in the outer top of reation kettle body 1, and the first opening that supplies (mixing) shaft 30 to pass is seted up at the top of reation kettle body 1, and the one end tip that (mixing) shaft 30 is located the reation kettle body 1 is provided with stirring thick liquid 32. Under the drive of the driving motor 31, the stirring shaft 30 drives the stirring paddle 32 to rotate, and materials in the reaction kettle body 1 are stirred to be mixed.

As shown in fig. 1 and 4, in order to realize the sectional heating or cooling of the parts of the reaction kettle body 1 with different heights, a first jacket 3 is sleeved at the outer bottom of the reaction kettle body 1, and a through hole corresponding to a discharge hole 35 is formed at the bottom of the first jacket 3; the outer side of the reaction kettle body 1 is sequentially sleeved with 3 second jackets 4 from bottom to top, and the number of the second jackets 4 can be set to be 2 or 5 according to the height of the reaction kettle body 1, the height of the second jackets 4 and the difference of the material stacking heights in the reaction kettle body 1 in the actual reaction process. The upper and lower ends of the first jacket 3 and the second jacket 4 are welded with the uniform reaction kettle body 1 to ensure the connection strength.

As shown in fig. 1 and 2, the first jacket 3 and the second jacket 4 are both hollow structures, and a cavity 5 is arranged between the inside of the hollow structures and the outer surface of the reaction kettle body 1. The first jacket 3 and the second jacket 4 are respectively provided with an input port 6 and an output port 7 which are communicated with the cavity 5, a conveying pipeline is arranged between the input port 6 and the output port 7, the conveying pipeline comprises a first conveying pipeline 8 which is respectively communicated with the input port 6 and a second conveying pipeline 9 which is respectively communicated with the output port 7, a third conveying pipeline 10 is communicated between the first conveying pipelines 8, a fourth conveying pipeline 11 is communicated between the second conveying pipelines 9, and a fifth conveying pipeline 12 is communicated between the third conveying pipeline 10 and the fourth conveying pipeline 11.

The first jacket 3 and the input ports 6 of the 3 second jackets 4 are communicated through a first conveying pipeline 8, and the first jacket 3 and the input ports 6 of the 3 second jackets 4 are communicated through a second conveying pipeline 9; the first conveying pipelines 8 are communicated through the third conveying pipeline 10, and the second conveying pipelines 9 are communicated through the fourth conveying pipeline 11; finally, the third conveying pipeline 10 and the fourth conveying pipeline 11 are communicated through the fifth conveying pipeline 12. The arrangement ensures that the heating and cooling medium such as water or oil and the like form circulating flow in the conveying pipelines and the cavities 5 of the first jacket 3 and the second jacket 4, thereby reducing energy consumption and being beneficial to saving resources.

The first conveying pipeline 8 and the second conveying pipeline 9 are respectively provided with a second valve 22, when the materials accumulated in the reaction kettle body 1 are small, only the second valves 22 on the first conveying pipeline 8 and the second conveying pipeline 9 which are communicated with the first jacket 3 can be opened, so that heating and cooling media such as water or oil can circularly flow in the first jacket 3. When more materials are accumulated in the reaction kettle body 1, after the second valves 22 on the first conveying pipeline 8 and the second conveying pipeline 9 which are communicated with the first jacket 3 are opened, the second valves 22 on the first conveying pipeline 8 and the second conveying pipeline 9 which are communicated with the second jacket 4 are selectively opened according to the height of the materials, so that water or oil or the like is heated, and cooling media circularly flow in the first jacket 3 and the second jacket 4 with the corresponding height.

The heated water or oil medium contacts with the outer surface of the reaction kettle body 1, and after circulating for several circles in each jacket and each conveying pipeline, the temperature is reduced, and the temperature required by the reaction of materials in the reaction kettle cannot be met, so that the water or oil medium needs to be continuously heated. Therefore, the temperature control device is provided on the conveying pipe in this embodiment, the temperature control device includes the heater 13 and the first temperature sensor 14 provided on the fifth conveying pipe 12, and the heater 13 is located at one end of the fifth conveying pipe 12 toward the third conveying pipe 10.

The water or oil medium flowing through the fifth conveying pipeline 12 can be heated by the heater 13 to reach the temperature required by the reaction of the materials in the reaction kettle, and then flows into the first jacket 3 and the corresponding second jacket 4 again through the third conveying pipeline 10 and the first conveying pipeline 8, so that the reaction kettle body 1 is continuously heated. The first temperature sensor 14 may be used to sense the temperature of the medium such as water or oil in the fifth conveying pipe 12 in real time, and transmit a signal to the heater 13 according to the set temperature requirement, so as to control the heating temperature of the heater 13.

In order to enable the heating medium such as water or oil to fill the whole first jacket 3 or the second jacket 4 and to perform sufficient heat exchange with the reaction vessel body 1, in this embodiment, the input port 6 is provided at the lower end of the jacket, and the output port 7 is provided at the upper end of the jacket such that the level of the input port 6 is lower than the level of the output port 7. The heating medium such as water or oil enters the first jacket 3 or the second jacket 4 from the input port 6, flows from bottom to top, overflows from the output port 7 after filling the whole first jacket 3 or the second jacket 4, can ensure that the outer surface of the reaction kettle body 1 is always surrounded by the heating medium such as water or oil, and effectively improves the temperature of the reaction kettle body 1.

As shown in fig. 1 and 3, after the reaction of the reaction kettle is completed, the reaction kettle needs to be cooled rapidly, so that a sixth conveying pipeline 19 is communicated between the fifth conveying pipeline 12 and the third conveying pipeline 10 between the filter 16 and the heater 13, a seventh conveying pipeline 20 is communicated between the fifth conveying pipeline 12 and the fourth conveying pipeline 11 between the filter 16 and the heater 13, the sixth conveying pipeline 19 is communicated with the seventh conveying pipeline 20, the temperature control device further comprises a cooler 21 and a second temperature sensor 37 which are arranged on the seventh conveying pipeline 20, and the cooler 21 is positioned at one end of the seventh conveying pipeline 20 towards the fourth conveying pipeline 11.

In the heating process of the reaction kettle, the input port 6 is the inflow end of the heating medium such as water or oil, the output port 7 is the outflow end of the heating medium such as water or oil, but in the cooling process of the reaction kettle, the opposite is the opposite, i.e. the input port 6 is the outflow end of the cooling medium such as water or oil, and the output port 7 is the inflow end of the cooling medium such as water or oil. The cooler 21 can discharge the input port 6, and the water or oil medium flowing into the seventh conveying pipeline 20 through the third conveying pipeline 10 and the sixth conveying pipeline 19 is cooled to reach the temperature required by the reaction of the materials in the reaction kettle, and then flows into the corresponding jacket through the fourth conveying pipeline 11 and the second conveying pipeline 9 to continuously cool the reaction kettle body 1. The second temperature sensor 37 can be used for detecting the temperature of the medium such as water or oil in the seventh conveying pipeline 20 in real time, transmitting a signal to the cooler 21 according to the set temperature requirement, and controlling the cooling temperature of the cooler 21.

As shown in fig. 1 to 3, to distinguish the heating pipeline route and the cooling pipeline route of the medium such as water or oil, the end of the fifth conveying pipeline 12 communicated with the heater 13 is provided with a third valve 23, and the end of the fifth conveying pipeline 12 communicated with the fourth conveying pipeline 11 is provided with a fourth valve 24; the sixth transfer line 19 is provided with a fifth valve 25 and the seventh transfer line 20 between the cooler 21 and the fifth transfer line 12 is provided with a sixth valve 26.

When the reaction kettle is heated, the third valve 23 and the fourth valve 24 are opened, the fifth valve 25 and the sixth valve 26 are closed, namely the sixth conveying pipeline 19 and the seventh conveying pipeline 20 are closed, so that water or oil medium can only flow into the heater 13 for heating through the fifth conveying pipeline 12, and the heated water or oil medium flows into the first jacket 3 or the second jacket 4 through the first conveying pipeline 8; when the reaction kettle is cooled, the fifth valve 25 and the sixth valve 26 are opened, the third valve 23 and the fourth valve 24 are closed, namely the connection between the fifth conveying pipeline 12 and the heater 13 and the connection between the third conveying pipeline and the second conveying pipeline 9 are closed, so that water or oil medium can only flow into the seventh conveying pipeline 20 through the sixth conveying pipeline 19 and is cooled through the cooler 21, and the cooled water or oil medium flows into the first jacket 3 or the second jacket 4 through the fourth conveying pipeline 11.

As shown in fig. 1, in the process of cyclic heating and cooling, the amount of the water or oil medium is gradually reduced and impurities are easy to occur, so in this embodiment, the fifth conveying pipeline 12 is further communicated with the storage tank 15 and the filter 16, the eighth conveying pipeline 28 is communicated between the storage tank 15 and the fifth conveying pipeline 12, the eighth conveying pipeline 28 is provided with the seventh valve 29, the seventh valve 29 is connected with the liquid level sensors arranged in the first jacket 3 and the second jacket 4, the liquid level sensors sense the liquid level of the water or oil medium in the first jacket 3 and the second jacket 4, and when the liquid level is reduced, that is, the water or oil medium cannot overflow from the output port 7, that is, the seventh valve 29 is opened, so that the water or oil medium in the storage tank 15 flows into the fifth conveying pipeline 12 through the eighth conveying pipeline 28, so as to ensure the circulation of the water or oil medium in each corresponding conveying pipeline.

The filter 16 is located between the storage tank 15 and the heater 13, and is used for filtering impurities in the water or oil medium flowing out of the output port 7, the filter 16 is communicated with an output pipeline 17, a first valve 18 is arranged on the output pipeline 17, the filtered water or oil medium in each of the delivery pipelines and the first jacket 3 and the second jacket 4 can be discharged through the output pipeline 17, and then the water or oil medium is refilled through the storage tank 15.

As shown in fig. 4, after the reaction in the reaction kettle is finished and the materials in the reaction kettle are taken out, the reaction kettle needs to be cleaned, mirror polishing treatment is adopted in the reaction kettle body 1 for cleaning, a second opening and a third opening are further formed in the top of the reaction kettle body 1, a water spraying connector 33 is arranged in the second opening, a gas spraying connector 34 is arranged in the third opening and is respectively used for connecting a water spraying pipe and a gas spraying pipe, cleaning and drying are carried out on the interior of the reaction kettle, and sewage after cleaning is discharged from a discharge hole 35.

The embodiments of the present utility model have been described in detail with reference to the accompanying drawings, but the present utility model is not limited to the embodiments described above, and it will be apparent to those skilled in the art that various modifications and improvements can be made therein without departing from the scope of the utility model.

Claims (10)

1. The utility model provides a many control by temperature change reation kettle, includes reation kettle body (1), the inside of reation kettle body (1) is provided with agitating unit, its characterized in that, the outer bottom cover of reation kettle body (1) is equipped with first clamp cover (3), the outside portion of reation kettle body (1) is equipped with 2~5 second clamp covers (4) from bottom to top in proper order, first clamp cover (3) with second clamp cover (4) all set up to hollow structure, its inside with all be provided with cavity (5) between the surface of reation kettle body (1), all set up on first clamp cover (3) and the second clamp cover (4) with input port (6) and output port (7) that cavity (5) are linked together, input port (6) with be provided with pipeline between output port (7), be provided with temperature control device on the pipeline.

2. The multi-temperature-control reaction kettle according to claim 1, wherein the input port (6) is positioned at the lower end of the jacket, the output port (7) is positioned at the upper end of the jacket, and the level of the input port (6) is lower than the level of the output port (7).

3. The multi-temperature-control reaction kettle according to claim 2, wherein the conveying pipelines comprise first conveying pipelines (8) which are respectively communicated with the input ports (6), and second conveying pipelines (9) which are respectively communicated with the output ports (7), third conveying pipelines (10) are communicated between the first conveying pipelines (8), fourth conveying pipelines (11) are communicated between the second conveying pipelines (9), and fifth conveying pipelines (12) are communicated between the third conveying pipelines (10) and the fourth conveying pipelines (11).

4. A multi-temperature-control reaction kettle according to claim 3, characterized in that the temperature control device comprises a heater (13) and a first temperature sensor (14) which are arranged on the fifth conveying pipeline (12), a storage tank (15) and a filter (16) are further communicated on the fifth conveying pipeline (12), the filter (16) is positioned between the storage tank (15) and the heater (13), an output pipeline (17) is communicated with the filter (16), and a first valve (18) is arranged on the output pipeline (17).

5. The multi-temperature-control reaction kettle according to claim 4, wherein a sixth conveying pipeline (19) is communicated between a fifth conveying pipeline (12) positioned between the filter (16) and the heater (13) and the third conveying pipeline (10), a seventh conveying pipeline (20) is communicated between the fifth conveying pipeline (12) positioned between the filter (16) and the heater (13) and the fourth conveying pipeline (11), the sixth conveying pipeline (19) is communicated with the seventh conveying pipeline (20), and the temperature control device further comprises a cooler (21) and a second temperature sensor (37) which are arranged on the seventh conveying pipeline (20).

6. The multi-temperature-control reaction kettle according to claim 5, wherein the first conveying pipeline (8) and the second conveying pipeline (9) are respectively provided with a second valve (22), one end of the fifth conveying pipeline (12) communicated with the heater (13) is provided with a third valve (23), one end of the fifth conveying pipeline (12) communicated with the fourth conveying pipeline (11) is provided with a fourth valve (24), the sixth conveying pipeline (19) is provided with a fifth valve (25), and a seventh conveying pipeline (20) between the cooler (21) and the fifth conveying pipeline (12) is provided with a sixth valve (26).

7. The multi-temperature-control reaction kettle according to claim 6, wherein liquid level sensors are arranged in the first jacket (3) and the second jacket (4), an eighth conveying pipeline (28) is communicated between the storage tank (15) and the fifth conveying pipeline (12), a seventh valve (29) is arranged on the eighth conveying pipeline (28), and the seventh valve (29) is connected with the liquid level sensors.

8. The multi-temperature-control reaction kettle according to any one of claims 1-7, wherein the stirring device comprises a stirring shaft (30) and a driving motor (31) for driving the stirring shaft (30) to rotate, the driving motor (31) is arranged at the outer top of the reaction kettle body (1), a first opening for the stirring shaft (30) to pass through is formed in the top of the reaction kettle body (1), and stirring slurry (32) is arranged at one end part of the stirring shaft (30) in the reaction kettle body (1).

9. The multi-temperature-control reaction kettle according to claim 8, wherein a second opening and a third opening are further formed in the top of the reaction kettle body (1), a water spraying joint (33) is arranged in the second opening, a gas spraying joint (34) is arranged in the third opening, and a water outlet (35) is formed in the bottom of the reaction kettle body (1).

10. The multi-temperature-control reaction kettle according to claim 9, wherein the top of the reaction kettle body (1) is further provided with an observation hole (36).