Reactor

Abstract

The invention discloses a reaction kettle, comprising a kettle body, an upper cover, an internal heating device, a stirring device, a packing sealing device and a control device. The invention is characterized in that a leakage receiving and self-discharging device is arranged at the lower end of the kettle body, and an automatic cleaning device is arranged at the bottom of the kettle body. Due to the adoption of the above structure, the invention has the advantages of novel structure, fast heating speed, sufficient and uniform heating, small space occupied by the heating device, large material processing volume, high work efficiency, convenient leakage liquid treatment, no pollution, long service life, etc.

Description

Technical Field

[0001] The invention relates to the technical field of chemical containers, in particular to a reaction kettle for heating reactants. Background Art

[0002] At present, the existing reactor is usually composed of a reactor body 1, an upper cover 2, an internal heating device 3, a stirring device 4 and a control device. The upper end of the reactor body 1 is provided with an upper cover 2, and the lower end is connected to the stirring device 4 through a packing sealing device 5. The reactor body 1 is provided with an internal heating device 3, and the internal heating device 3 is connected to the inner wall of the reactor body 1 through a support frame. The upper end of the internal heating device 3 is connected to the water inlet pipe fixed to the side wall of the reactor body 1, and the lower end is connected to the water outlet pipe fixed to the side wall of the reactor body 1. The stirring device 4 is controlled by the control device. Some of the internal heating devices 3 are barrel-shaped with spiral pipes, and some are annular heating barrels formed by sleeves of annular inner barrels and annular outer barrels on both sides of the barrel-shaped spiral pipeline, such as the announcement number: CN214863577 U, the patent name is: A reactor for polyesterification of insulating resin. The existing structures have the following problems: 1. The problem of setting the stirring device 4 at the bottom of the kettle body 1 is that the stirring shaft 4-1 in the stirring device 4 of the traditional reactor is connected to the bottom of the reactor body 1 through the packing seal device 5, the sealing ring and the bearing. Although the packing 5-4 is used to seal to prevent liquid from overflowing, if the packing 5-4 is installed too tightly, the rotation resistance of the stirring shaft 4-1 will be large, and the mutual friction will generate heat and shorten the bearing life. Therefore, when installing the packing seal device 5, the temperature rise of the packing seal device 5 is usually adjusted to not higher than 40 degrees Celsius of the ambient temperature for normal use. At this time, when the kettle body 1 is used in a high-pressure production environment, the leakage between the sealing device and the stirring shaft 4-1 can only be kept in the form of intermittent drips and discharged to the outside of the kettle body 1, which requires timely processing by the staff. Otherwise, it is not only easy to flow into the reducer 4-3 to cause a short circuit, but also easy to cause pollution to the production site. Therefore, this is also a substantial technical problem that needs to be solved by technicians in this field.

[0003] After searching CN114857268A, an invention patent application based on a sealing device for a stirring shaft 4-1 of a bioreactor is disclosed. When this structure is in use, when leakage occurs in the connection area between the reactor body 1 and the stirring shaft 4-1 for the reactor, the leaked material passes through the first lip seal ring and enters the inner sealing cover and the lower sealing cover, and the leaked material can be stored to avoid the leakage being directly discharged to the outside of the reactor body 1 to pollute the production environment. After the leaked material accumulates inside the inner sealing cover, manual maintenance is required. When the inner sealing cover and the lower sealing cover are disassembled, the adjusting bottom cylinder is rotated, and a connection similar to a worm gear transmission is formed with the outer teeth of the arc frame through the outer adjusting spiral, and the driven traction arc frame is pulled upward to rotate the upper end of the synchronous locking plate outward, so that the outer limit collar is separated from the fixation of the upper lock buckle, and the inner sealing cover and the lower sealing cover can be separated, and the leaked material accumulated in the inner sealing cover is cleaned. After the cleaning is completed, the inner sealing cover and the lower sealing cover are re-fastened, and the synchronous locking plates at all four sides are restored to their original positions by rotating the adjusting bottom cylinder, and the inner sealing cover can be used continuously. The substantial shortcomings are: 1) It is impossible to determine the amount of leakage in the inner sealing cover and the lower sealing cover. Therefore, when the leakage is large, it will overflow from the gap between the inner sealing cover and the lower sealing cover, and the pollution problem cannot be solved; 2) The structure is complicated, and the received leakage needs to be cleaned manually. When cleaning, disassembly is very troublesome, and the leakage will be scattered on other parts or the surrounding ground during the disassembly process. Therefore, the problem of pollution in the production site cannot be solved either;

[0004] 2. Regarding the heating device, the shortcomings of using the first type of spiral coil heating are: 1) Due to the large size and heavy weight of the heating device, when it is fixed to the inner wall of the kettle body 1, it needs to be fixed with several U-bolts and angle steels. When cleaning, it is difficult to clean due to the existence of sanitary dead corners; 2) Due to the thick diameter of the spiral coil pipe, the heating device occupies a large space, which in turn reduces the space for holding materials in the reactor, resulting in a small amount of material processing and low work efficiency. The second type of annular heating barrel heating: 1) The material in the heating barrel and the material outside the heating barrel cannot be mixed, resulting in insufficient heating; 2) Since the annular barrel is composed of a barrel-shaped spiral pipe and an annular inner barrel and an annular outer barrel on both sides, it also occupies a large space, which in turn reduces the space for holding materials in the reactor, resulting in a small amount of material processing and low work efficiency. Summary of the invention

[0005] In order to solve the substantial deficiencies of the above-mentioned prior art, the present invention provides a reactor with novel structure, fast heating speed, sufficient and uniform heating, small space occupied by the heating device, large material processing capacity, high work efficiency, convenient leakage liquid treatment, no pollution and long service life.

[0006] The technical means adopted by the present invention to solve the above technical problems are:

[0007] A reaction kettle, comprising a kettle body 1, an upper cover 2, an internal heating device 3, a stirring device 4, a packing sealing device 5 and a control device, wherein the stirring device 4 is composed of a stirring shaft 4-1, a stirring blade 4-2, and a reducer 4-3, wherein the stirring shaft 4-1 is connected to the bottom of the kettle body 1 via the packing sealing device 5, wherein the upper end of the stirring shaft 4-1 is fixedly connected to the stirring blade 4-2, and the lower end is connected to the reducer 4-3, wherein the reducer 4-3 is controlled by the control device, and wherein the lower end of the kettle body 1 is provided with a leakage receiving and self-discharging device 6, which comprises a connecting frame 6-1, a water receiving tray 6-2, a coupling flange 6-3, a coupling 6-4, an upper bearing seat assembly 6-5, a lower bearing seat assembly 6-6, and a drain pipe 6-7,

[0008] The connecting frame 6-1 is composed of a bracket 6-1-1, an upper flange 6-1-2 and a lower flange 6-1-3. The upper end of the bracket 6-1-1 is fixedly connected to the upper flange 6-1-2, and the lower end is fixedly connected to the lower flange 6-1-3. The coupling flange 6-3 is located inside the bracket 6-1-1 and is fixedly connected to the inner wall of the bracket 6-1-1. A water receiving tray 6-2 is provided above the coupling flange, and the water receiving tray 6-2 is fixedly connected to the inner wall of the bracket 6-1-1.

[0009] The connecting frame 6-1 is fixedly connected to the bottom of the kettle body 1 through the upper flange 6-1-2 by means of studs and nuts, and is fixedly connected to the reducer 4-3 through the lower flange 6-1-3 by means of bolts and nuts. The output shaft of the reducer 4-3 passes through the center of the lower flange 6-1-3 through the coupling 6-4 and is fixedly connected to the lower bearing seat assembly 6-6. The stirring shaft 4-1 passes through the packing sealing device 5 and the upper bearing seat assembly 6-5 in sequence, and its lower end is connected to the lower bearing seat assembly 6-6. The lower bearing seat is fixed on the coupling flange, and the upper bearing The outer periphery of the seat assembly 6-5 is fixedly connected to the center of the water receiving pan 6-2. A drain outlet is provided on the bottom surface of the water receiving pan 6-2. The upper end of the drain pipe 6-7 is connected to the drain outlet, and a drain valve is provided at the lower end. By keeping the upper bearing seat assembly 6-5 away from the packing sealing device 5, the service life of the bearing in the upper bearing seat assembly 6-5 is significantly improved. At the same time, the water receiving pan 6-2 receives the leaked liquid, and the liquid received in the water receiving pan 6-2 flows into the drain pipe 6-7 through the drain outlet and is discharged into the water receiving container, thereby achieving the effect of automatically discharging the leaked liquid.

[0010] The packing sealing device 5 of the present invention comprises an overflow water outlet device 5-1, an inner sleeve 5-2, an outer sleeve 5-3, a packing 5-4, and a packing sealing gland 5-5. The overflow water outlet device 5-1 is composed of a connecting joint 5-1-1 and a connecting pipe 5-1-2. The outer part of the inner sleeve 5-2 is fixedly sleeved with the outer sleeve 5-3, and the inner part is fixedly sleeved with the stirring shaft 4-1. The upper end of the inner sleeve 5-2 is in contact with the packing 5-4. The inner wall of the inner sleeve 5-2 is provided with an annular inner groove 5-2- 1, the outer wall is provided with an annular outer groove 5-2-2, the annular inner groove 5-2-1 and the annular outer groove 5-2-2 are connected through a connecting hole, so as to facilitate the water collected by the annular inner groove 5-2-1 to be diverted to the annular outer groove 5-2-2 through the connecting hole, the lower end of the outer shaft sleeve 5-3 is fixedly connected to the upper flange 6-1-2, and the upper end is sealed and fixedly connected to the packing seal gland 5-5 of the sealing sleeve on the stirring shaft 4-1, and the upper part of the inner wall of the outer shaft sleeve 5-3 is sealed and connected to the stirring shaft 4-1 through the packing 5-4,

[0011] The inner wall of the outer sleeve 5-3 is radially provided with a transverse drainage hole 5-3-1, and axially provided with an axial drainage hole 5-3-2. One end of the transverse drainage hole 5-3-1 is connected with the annular outer groove 5-2-2, and the other end is connected with the upper end of the axial drainage hole 5-3-2. The lower end of the axial drainage hole 5-3-2 is connected with the connecting pipe 5-1-2 through the connecting joint 5-1-1. The connecting pipe 5-1-2 is connected with the water receiving tray 6-2, so as to facilitate the water leaking from the packing sealing device 5 to be introduced into the water receiving tray 6-2 through the connecting pipe 5-1-2, so as to avoid the liquid flowing along the stirring shaft 4-1 to the reducer 4-3 or the ground to cause damage or pollution to the reducer 4-3 or the environment. At the same time, there is no need for manual cleaning, which greatly reduces the workload of the operator.

[0012] The upper bearing seat assembly 6-5 of the present invention comprises a thrust bearing 6-5-1, an upper bearing sealing cover 6-5-2, and an upper bearing seat 6-5-3. The upper bearing seat 6-5-3 is sleeved on the stirring shaft 4-1. The outer periphery of the upper bearing seat 6-5-3 is fixedly connected to the water receiving tray 6-2. The upper end of the upper bearing seat 6-5-3 is connected to the lower ring of the thrust bearing 6-5-1. The upper ring of the thrust bearing 6-5-1 is connected to the upper bearing sealing cover 6-5 sleeved on the stirring shaft 4-1. -2 is fixedly connected, the upper end of the upper bearing sealing cover 6-5-2 is fixedly abutted against the shoulder of the stirring shaft 4-1, the outer diameter of the upper end of the upper bearing sealing cover 6-5-2 is smaller than the diameter of the shoulder of the stirring shaft, and the outer wall of the upper bearing sealing cover 6-5-2 is inclined from top to bottom and from the center to the periphery to form a diversion slope, so as to receive the water left along the stirring shaft 4-1 and divert it to the water receiving tray 6-2, so as to prevent the leaked water from continuing to flow down along the stirring shaft 4-1.

[0013] The present invention may also be provided with an overflow pipe 11, the upper end of which passes through the bottom surface of the water receiving pan 6-2, and its upper end is lower than the upper end surface of the water receiving pan 6-2. A drain valve is provided at the lower end to help avoid the water in the water receiving pan 6-2 being discharged through the overflow pipe 11 when the drain outlet on the bottom surface of the water receiving pan 6-2 is blocked.

[0014] The lower end of the connecting pipe 5 - 1 - 2 of the present invention can be inserted into the overflow pipe 11 to facilitate the leakage water to be discharged directly through the overflow pipe 11 .

[0015] The present invention may also provide a conical protective sleeve (6-5-4) at the lower end of the upper bearing sealing cover 6-5-2, wherein the conical protective sleeve is located above the upper bearing seat and covers the upper bearing seat, and the small diameter end of the conical protective sleeve is fixedly connected to the large diameter end of the upper bearing sealing cover, so as to facilitate the leakage of water to be diverted to the water receiving tray through the conical protective sleeve, and at the same time, prevent the liquid from entering the stirring shaft again through the upper end surface of the upper bearing seat.

[0016] The present invention may also be provided with a proximity switch 9 on the upper flange 6-1-2, and a sensing block is provided on the side wall of the coupling 6-4. The proximity switch 9 corresponds to the sensing block, and the proximity switch 9 is connected to a control system to facilitate receiving the number of revolutions of the coupling 6-4 through the proximity switch 9, so as to achieve precise control of the stirring effect in the kettle body 1.

[0017] The present invention can also be provided with a protective cover 6-8 on the outside of the connecting frame 6-1, and the protective cover 6-8 is formed by at least two semi-annular cover plates relatively connected, the upper end of the semi-annular cover plate is fixedly connected to the upper flange 6-1-2 by screws, and the lower end is fixedly connected to the lower flange 6-1-3 by screws. A handle is provided on the outside of the semi-annular cover plate to prevent the odor of the liquid from being emitted into the air and polluting the environment, and at the same time, it also achieves the purpose of facilitating maintenance.

[0018] The present invention can also be provided with an automatic cleaning device 10 at the bottom of the kettle body 1, which includes a conical trough body 10-1, a fixed plate 10-2, a connecting plate 10-3, a scraper 10-4, and a sewage pipe 10-5. The outer wall of the conical trough body 10-1 is inclined outward to form a bowl-shaped shape. The upper end of the conical trough body 10-1 is fixedly connected to the center of the lower end of the kettle body 1. A sewage pipe 10-5 is provided on one side of the lower part of the conical trough body 10-1. A sewage switch is provided on the sewage pipe 10-5. The fixed plate 10-2 is fixed to the lower end of the stirring blade 4-2 or one side of the stirring shaft. The upper end of the connecting plate 10-3 is connected to the fixed plate 1 0-2 is cross-fixedly connected, and the lower end is cross-fixedly connected with the scraper 10-4, the side wall of the scraper 10-4 cooperates with the inner wall of the conical groove, and the lower end of the scraper 10-4 cooperates with the bottom surface of the conical groove body 10-1, so as to facilitate the rotation of the stirring shaft 4-1, drive the stirring blade 4-2 to rotate, and the fixed plate 10-2, the connecting plate 10-3 and the scraper 10-4 at the lower end of the stirring blade 4-2 also rotate at the same time, and then the scraper 10-4 automatically scrapes off the dirt deposited on the inner wall and bottom surface of the conical groove body 10-1, and the scraped dirt is discharged through the sewage pipe 10-5, and there is no need to manually open the upper cover 2 for cleaning.

[0019] The internal heating device 3 of the present invention is composed of an annular steam inlet pipe 3-1, a barrel-shaped jacket 3-2, an annular condensate outlet pipe 3-3, an external steam inlet pipe 3-4, and an external condensate outlet pipe 3-5. The side wall of the barrel-shaped jacket 3-2 is provided with a plurality of turbulent flow holes 3-6 to facilitate sufficient stirring of the reaction materials. The upper end of the barrel-shaped jacket 3-2 is fixedly connected to the lower end of the annular steam inlet pipe 3-1, and the lower end is connected to the annular condensate outlet pipe 3-3. The thickness of the barrel-shaped jacket 3-2 is less than the tube radius of the annular steam inlet pipe 3-1 or the annular condensate outlet pipe 3-3, that is, less than half the thickness of the annular steam inlet pipe 3-1 or the annular condensate outlet pipe 3-3. The embodiment of the present invention is that the barrel-shaped jacket 3 -2 is one-fourth the thickness of the annular steam inlet pipe 3-1 or the annular condensate outlet pipe 3-3, which significantly reduces the weight and occupied space of the internal heating device 3. The upper end of the interlayer space of the barrel-shaped jacket 3-2 is connected to the steam outlet holes provided at intervals on the side wall of the annular steam inlet pipe 3-1, and the lower end is connected to the condensate inlet provided on the upper side wall of the annular condensate outlet pipe 3-3. The annular steam inlet pipe 3-1 is connected to the steam outlet of the steam inlet pipe, and the annular condensate outlet pipe 3-3 is connected to the external condensate outlet pipe 3-5. The external steam inlet pipe 3-4 and the external condensate outlet pipe 3-5 are fixed on the kettle body 1, and the annular condensate outlet pipe 3-3 is fixedly connected to the inner wall of the kettle body 1 via the connecting frame 6-1.

[0020] The barrel-shaped jacket 3-2 of the present invention can also be composed of a supporting jacket 3-2-1, an inner jacket body 3-2-2 and an outer jacket body 3-2-3, wherein the supporting jacket 3-2-1 is located between the inner jacket body 3-2-2 and the outer jacket body 3-2-3, so that an inner heat exchange cavity is formed between the supporting jacket 3-2-1 and the inner jacket body 3-2-2, and an outer heat exchange cavity is formed between the supporting jacket 3-2-1 and the outer jacket body 3-2-3, and the upper ends of the inner heat exchange cavity and the outer heat exchange cavity are respectively connected to the annular steam inlet pipe 3-1 through the steam outlet, and the lower ends are connected to the annular steam inlet pipe 3-1 through the steam outlet. The two ends are respectively connected through the condensate inlet of the annular condensate outlet pipe 3-3, so as to improve the heat exchange effect. The supporting jacket 3-2-1 is provided with a turbulent flow hole 3-6, the inner sleeve 3-2-2 is provided with an inner turbulent flow groove, and the outer sleeve 3-2-3 is provided with an outer turbulent flow groove. The centers of the inner turbulent flow groove, the turbulent flow hole 3-6 and the outer turbulent flow groove are on the same center line. The outer turbulent flow groove and the inner turbulent flow groove are respectively extended in a disc shape to the periphery of the turbulent flow hole 3-6 and are sealed and fixed, so as to increase the heat exchange area.

[0021] In the present invention, an external heating device 8 may be provided on the outer wall of the kettle body. The structure of the external heating device is the same as that of the internal heating device, which will not be described in detail.

[0022] The cross-section of the annular steam inlet pipe 3-1 and the annular condensate outlet pipe 3-3 in the external heating device of the present invention is semicircular, so as to increase the fitting area between the inner walls of the annular steam inlet pipe 3-1 and the annular condensate outlet pipe 3-3 and the outer wall of the kettle body, thereby further improving the heating speed of the reaction materials in the kettle body.

[0023] The steam outlet of the present invention may be in the shape of a long strip, so that the jet can enter the inner heat exchange cavity and the outer heat exchange cavity, so as to accelerate the heat exchange of the material in the kettle body 1.

[0024] The kettle body and the upper cover of the present invention are provided with an upper cover opening device 12 to achieve the function of convenient, safe and fast opening of the upper cover.

[0025] The upper cover opening device 12 described in the present invention includes a support body, a sleeve, a lifting sleeve, a rotating arm, and a screw rod. The lower end of the support body is fixedly connected to the kettle body, and the upper end is fixedly connected to the sleeve. The lower end of the rotating arm is connected to the bearing in the sleeve via a support rod, and the other end of the rotating arm is fixedly connected to the lifting sleeve. After the screw rod is threadedly connected to the lifting sleeve, its lower end is fixedly connected to the upper cover. When the reaction material is to be put in, the operator can hold the rotating arm and rotate the upper cover to one side of the kettle body with the axis of the sleeve as the center. When the cover is to be closed, the upper cover is rotated to the top of the kettle body mouth, and then the screw rod is rotated. The upper cover is gradually moved down and sealed to cover the kettle body mouth under the drive of the screw rod, thereby achieving the effect of convenient opening and closing.

[0026] The present invention can also provide a movable sleeve on one side of the lifting sleeve, the crossbar handle is slidably connected to the movable sleeve, and limiting balls with a diameter larger than that of the movable sleeve are provided at both ends of the crossbar handle to facilitate the rotation of the upper cover.

[0027] The present invention has the advantages of novel structure, fast heating speed, sufficient and uniform heating, small space occupied by the heating device, large material processing volume, high work efficiency, convenient leakage liquid treatment, no pollution, and long service life due to the adoption of the above structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic structural diagram of an embodiment of the present invention.

[0029] Figure 2 It is a schematic diagram of the structure of the leakage receiving device in the present invention.

[0030] Figure 3 It is a three-dimensional schematic diagram of the connecting frame, the water receiving tray and the coupling flange in the present invention.

[0031] Figure 4 It is a structural schematic diagram of the packing sealing device in the present invention.

[0032] Figure 5 It is a structural schematic diagram of the internal heating device in the present invention.

[0033] Figure 6 yes Figure 5 A cross-sectional view of an embodiment of AA.

[0034] Figure 7 yes Figure 5 A cross-sectional view of another embodiment of AA.

[0035] Figure 8 It is a three-dimensional structural schematic diagram of the barrel-shaped jacket of the internal heating device of the present invention.

[0036] Fig. 9 It is a structural schematic diagram of the automatic cleaning device of the present invention.

[0037] Figure numerals: kettle body 1, upper cover 2, internal heating device 3, annular steam inlet pipe 3-1, barrel-shaped jacket 3-2, annular condensate outlet pipe 3-3, external steam inlet pipe 3-5, external condensate outlet pipe 3-5, stirring device 4, stirring shaft 4-1, stirring blade 4-2, reducer 4-3, packing sealing device 5, overflow water outlet device 5-1, inner sleeve 5-2, annular inner groove 5-2-1, annular outer groove 5-2-2, outer sleeve 5-3, transverse drainage hole 5-3-1, axial drainage hole 5-3-2, packing 5-4, packing sealing cover 5-5, leakage connection Collected from the discharge device 6, the connecting frame 6-1, the bracket 6-1-1, the upper flange 6-1-2, the lower flange 6-1-3, the water receiving tray 6-2, the coupling flange 6-3, the coupling 6-4, the upper bearing seat assembly 6-5, the thrust bearing 6-5-1, the upper bearing sealing cover 6-5-2, the upper bearing seat 6-5-3, the lower bearing seat assembly 6-6, the drain pipe 6-7, the proximity switch 9, the automatic cleaning device 10, the conical trough body 10-1, the fixing plate 10-2, the connecting plate 10-3, the scraper 10-4, the sewage pipe 10-5, the overflow pipe 11, and the upper cover opening device 12. DETAILED DESCRIPTION

[0038] The present invention is described below in conjunction with the accompanying drawings and embodiments.

[0039] As shown in the accompanying drawings, a reaction kettle comprises a kettle body 1, an upper cover 2, an internal heating device 3, a stirring device 4, a packing sealing device 5 and a control device. The stirring device 4 is composed of a stirring shaft 4-1, a stirring blade 4-2, and a reducer 4-3. The stirring shaft 4-1 is connected to the bottom of the kettle body 1 through a packing sealing device 5. The upper end of the stirring shaft 4-1 is fixedly connected to the stirring blade 4-2, and the lower end is connected to the reducer 4-3. The reducer 4-3 is controlled by the control device. It is characterized in that the lower end of the kettle body 1 is provided with a leakage receiving and self-discharging device 6, which includes a connecting frame 6-1, a water receiving tray 6-2, a coupling flange 6-3, a coupling 6-4, an upper bearing seat assembly 6-5, a lower bearing seat assembly 6-6, and a drain pipe 6-7.

[0040] The connecting frame 6-1 is composed of a bracket 6-1-1, an upper flange 6-1-2 and a lower flange 6-1-3. The upper end of the bracket 6-1-1 is fixedly connected to the upper flange 6-1-2, and the lower end is fixedly connected to the lower flange 6-1-3. The coupling flange 6-3 is located inside the bracket 6-1-1 and is fixedly connected to the inner wall of the bracket 6-1-1. A water receiving tray 6-2 is provided above the coupling flange, and the water receiving tray 6-2 is fixedly connected to the inner wall of the bracket 6-1-1.

[0041] The connecting frame 6-1 is fixedly connected to the bottom of the kettle body 1 through the upper flange 6-1-2 by means of studs and nuts, and is fixedly connected to the reducer 4-3 through the lower flange 6-1-3 by means of bolts and nuts. The output shaft of the reducer 4-3 passes through the center of the lower flange 6-1-3 through the coupling 6-4 and is fixedly connected to the lower bearing seat assembly 6-6. The stirring shaft 4-1 passes through the packing sealing device 5 and the upper bearing seat assembly 6-5 in sequence, and its lower end is connected to the lower bearing seat assembly 6-6. The lower bearing seat is fixed on the coupling flange, and the upper bearing The outer periphery of the seat assembly 6-5 is fixedly connected to the center of the water receiving pan 6-2. A drain outlet is provided on the bottom surface of the water receiving pan 6-2. The upper end of the drain pipe 6-7 is connected to the drain outlet, and a drain valve is provided at the lower end. By keeping the upper bearing seat assembly 6-5 away from the packing sealing device 5, the service life of the bearing in the upper bearing seat assembly 6-5 is significantly improved. At the same time, the water receiving pan 6-2 receives the leaked liquid, and the liquid received in the water receiving pan 6-2 flows into the drain pipe 6-7 through the drain outlet and is discharged into the water receiving container, thereby achieving the effect of automatically discharging the leaked liquid.

[0042] The packing sealing device 5 of the present invention comprises an overflow water outlet device 5-1, an inner sleeve 5-2, an outer sleeve 5-3, a packing 5-4, and a packing sealing gland 5-5. The overflow water outlet device 5-1 is composed of a connecting joint 5-1-1 and a connecting pipe 5-1-2. The outer part of the inner sleeve 5-2 is fixedly sleeved with the outer sleeve 5-3, and the inner part is fixedly sleeved with the stirring shaft 4-1. The upper end of the inner sleeve 5-2 is in contact with the packing 5-4. The inner wall of the inner sleeve 5-2 is provided with an annular inner groove 5-2- 1, the outer wall is provided with an annular outer groove 5-2-2, the annular inner groove 5-2-1 and the annular outer groove 5-2-2 are connected through a connecting hole, so as to facilitate the water collected by the annular inner groove 5-2-1 to be diverted to the annular outer groove 5-2-2 through the connecting hole, the lower end of the outer shaft sleeve 5-3 is fixedly connected to the upper flange 6-1-2, and the upper end is sealed and fixedly connected to the packing seal gland 5-5 of the sealing sleeve on the stirring shaft 4-1, and the upper part of the inner wall of the outer shaft sleeve 5-3 is sealed and connected to the stirring shaft 4-1 through the packing 5-4,

[0043] The inner wall of the outer sleeve 5-3 is radially provided with a transverse drainage hole 5-3-1, and axially provided with an axial drainage hole 5-3-2. One end of the transverse drainage hole 5-3-1 is connected with the annular outer groove 5-2-2, and the other end is connected with the upper end of the axial drainage hole 5-3-2. The lower end of the axial drainage hole 5-3-2 is connected with the connecting pipe 5-1-2 via the connecting joint 5-1-1. The connecting pipe 5-1-2 is connected with the water receiving tray 6-2, so as to facilitate the water leaking from the packing sealing device 5 to be introduced into the water receiving tray 6-2 through the connecting pipe 5-1-2, so as to avoid the liquid flowing along the stirring shaft 4-1 to the reducer 4-3 or the ground to cause damage or pollution to the reducer 4-3 or the environment. At the same time, there is no need for manual cleaning, which greatly reduces the workload of the operator.

[0044] The upper bearing seat assembly 6-5 of the present invention comprises a thrust bearing 6-5-1, an upper bearing sealing cover 6-5-2, and an upper bearing seat 6-5-3. The upper bearing seat 6-5-3 is sleeved on the stirring shaft 4-1. The outer periphery of the upper bearing seat 6-5-3 is fixedly connected to the water receiving tray 6-2. The upper end of the upper bearing seat 6-5-3 is connected to the lower ring of the thrust bearing 6-5-1. The upper ring of the thrust bearing 6-5-1 is connected to the upper bearing sealing cover 6-5 sleeved on the stirring shaft 4-1. -2 is fixedly connected, the upper end of the upper bearing sealing cover 6-5-2 is fixedly abutted against the shoulder of the stirring shaft 4-1, the outer diameter of the upper end of the upper bearing sealing cover 6-5-2 is smaller than the diameter of the shoulder of the stirring shaft, and the outer wall of the upper bearing sealing cover 6-5-2 is inclined from top to bottom and from the center to the periphery to form a diversion slope, so as to receive the water left along the stirring shaft 4-1 and divert it to the water receiving tray 6-2, so as to prevent the leaked water from continuing to flow down along the stirring shaft 4-1.

[0045] The present invention may also be provided with an overflow pipe 11, the upper end of which passes through the bottom surface of the water receiving pan 6-2, and its upper end is lower than the upper end surface of the water receiving pan 6-2. A drain valve is provided at the lower end to help avoid the water in the water receiving pan 6-2 being discharged through the overflow pipe 11 when the drain outlet on the bottom surface of the water receiving pan 6-2 is blocked.

[0046] The lower end of the connecting pipe 5 - 1 - 2 of the present invention can be inserted into the overflow pipe 11 to facilitate the leakage water to be discharged directly through the overflow pipe 11 .

[0047] The present invention may also provide a conical protective sleeve 6-5-4 at the lower end of the upper bearing sealing cover 6-5-2, wherein the conical protective sleeve is located above the upper bearing seat and covers the upper bearing seat, and the small diameter end of the conical protective sleeve is fixedly connected to the large diameter end of the upper bearing sealing cover to facilitate diverting the leaked water to the water receiving tray through the conical protective sleeve, and at the same time, prevent the liquid from re-entering the agitator shaft through the upper end surface of the upper bearing seat.

[0048] The present invention may also be provided with a proximity switch 9 on the upper flange 6-1-2, and a sensing block is provided on the side wall of the coupling 6-4. The proximity switch 9 corresponds to the sensing block, and the proximity switch 9 is connected to a control system to facilitate receiving the number of revolutions of the coupling 6-4 through the proximity switch 9, so as to achieve precise control of the stirring effect in the kettle body 1.

[0049] The present invention can also be provided with a protective cover 6-8 on the outside of the connecting frame 6-1, and the protective cover 6-8 is formed by at least two semi-annular cover plates relatively connected, the upper end of the semi-annular cover plate is fixedly connected to the upper flange 6-1-2 by screws, and the lower end is fixedly connected to the lower flange 6-1-3 by screws. A handle is provided on the outside of the semi-annular cover plate to prevent the odor of the liquid from being emitted into the air and polluting the environment, and at the same time, it also achieves the purpose of facilitating maintenance.

[0050] The present invention can also be provided with an automatic cleaning device 10 at the bottom of the kettle body 1, which includes a conical trough body 10-1, a fixed plate 10-2, a connecting plate 10-3, a scraper 10-4, and a sewage pipe 10-5. The outer wall of the conical trough body 10-1 is inclined outward to form a bowl-shaped shape. The upper end of the conical trough body 10-1 is fixedly connected to the center of the lower end of the kettle body 1. A sewage pipe 10-5 is provided on one side of the lower part of the conical trough body 10-1. A sewage switch is provided on the sewage pipe 10-5. The fixed plate 10-2 is fixed to the lower end of the stirring blade 4-2 or one side of the stirring shaft. The upper end of the connecting plate 10-3 is connected to the fixed plate 1 0-2 is cross-fixedly connected, and the lower end is cross-fixedly connected with the scraper 10-4, the side wall of the scraper 10-4 cooperates with the inner wall of the conical groove, and the lower end of the scraper 10-4 cooperates with the bottom surface of the conical groove body 10-1, so as to facilitate the rotation of the stirring shaft 4-1, drive the stirring blade 4-2 to rotate, and the fixed plate 10-2, the connecting plate 10-3 and the scraper 10-4 at the lower end of the stirring blade 4-2 also rotate at the same time, and then the scraper 10-4 automatically scrapes off the dirt deposited on the inner wall and bottom surface of the conical groove body 10-1, and the scraped dirt is discharged through the sewage pipe 10-5, and there is no need to manually open the upper cover 2 for cleaning.

[0051] The internal heating device 3 of the present invention is composed of an annular steam inlet pipe 3-1, a barrel-shaped jacket 3-2, an annular condensate outlet pipe 3-3, an external steam inlet pipe 3-4, and an external condensate outlet pipe 3-5. The side wall of the barrel-shaped jacket 3-2 is provided with a plurality of turbulent flow holes 3-6 to facilitate sufficient stirring of the reaction materials. The upper end of the barrel-shaped jacket 3-2 is fixedly connected to the lower end of the annular steam inlet pipe 3-1, and the lower end is connected to the annular condensate outlet pipe 3-3. The thickness of the barrel-shaped jacket 3-2 is less than the tube radius of the annular steam inlet pipe 3-1 or the annular condensate outlet pipe 3-3, that is, less than half the thickness of the annular steam inlet pipe 3-1 or the annular condensate outlet pipe 3-3. The embodiment of the present invention is that the barrel-shaped jacket 3 -2 is one-fourth the thickness of the annular steam inlet pipe 3-1 or the annular condensate outlet pipe 3-3, which significantly reduces the weight and occupied space of the internal heating device 3. The upper end of the interlayer space of the barrel-shaped jacket 3-2 is connected to the steam outlet holes provided at intervals on the side wall of the annular steam inlet pipe 3-1, and the lower end is connected to the condensate inlet provided on the upper side wall of the annular condensate outlet pipe 3-3. The annular steam inlet pipe 3-1 is connected to the steam outlet of the steam inlet pipe, and the annular condensate outlet pipe 3-3 is connected to the external condensate outlet pipe 3-5. The external steam inlet pipe 3-4 and the external condensate outlet pipe 3-5 are fixed on the kettle body 1, and the annular condensate outlet pipe 3-3 is fixedly connected to the inner wall of the kettle body 1 via the connecting frame 6-1.

[0052] The barrel-shaped jacket 3-2 of the present invention can also be composed of a supporting jacket 3-2-1, an inner jacket body 3-2-2 and an outer jacket body 3-2-3, wherein the supporting jacket 3-2-1 is located between the inner jacket body 3-2-2 and the outer jacket body 3-2-3, so that an inner heat exchange cavity is formed between the supporting jacket 3-2-1 and the inner jacket body 3-2-2, and an outer heat exchange cavity is formed between the supporting jacket 3-2-1 and the outer jacket body 3-2-3, and the upper ends of the inner heat exchange cavity and the outer heat exchange cavity are respectively connected to the annular steam inlet pipe 3-1 through the steam outlet, and the lower ends are connected to the annular steam inlet pipe 3-1 through the steam outlet. The two ends are respectively connected through the condensate inlet of the annular condensate outlet pipe 3-3, so as to improve the heat exchange effect. The supporting jacket 3-2-1 is provided with a turbulent flow hole 3-6, the inner sleeve 3-2-2 is provided with an inner turbulent flow groove, and the outer sleeve 3-2-3 is provided with an outer turbulent flow groove. The centers of the inner turbulent flow groove, the turbulent flow hole 3-6 and the outer turbulent flow groove are on the same center line. The outer turbulent flow groove and the inner turbulent flow groove are respectively extended in a disc shape to the periphery of the turbulent flow hole 3-6 and are sealed and fixed, so as to increase the heat exchange area.

[0053] In the present invention, an external heating device 8 may be provided on the outer wall of the kettle body. The structure of the external heating device is the same as that of the internal heating device, which will not be described in detail.

[0054] The cross-section of the annular steam inlet pipe 3-1 and the annular condensate outlet pipe 3-3 in the external heating device of the present invention is semicircular, so as to increase the fitting area between the inner walls of the annular steam inlet pipe 3-1 and the annular condensate outlet pipe 3-3 and the outer wall of the kettle body, thereby further improving the heating speed of the reaction materials in the kettle body.

[0055] The steam outlet of the present invention may be in the shape of a long strip, so that the jet can enter the inner heat exchange cavity and the outer heat exchange cavity, so as to accelerate the heat exchange of the material in the kettle body 1.

[0056] The kettle body and the upper cover of the present invention are provided with an upper cover opening device 12 to achieve the function of convenient, safe and fast opening of the upper cover.

[0057] The upper cover opening device 12 described in the present invention includes a support body, a sleeve, a lifting sleeve, a rotating arm, and a screw rod. The lower end of the support body is fixedly connected to the kettle body, and the upper end is fixedly connected to the sleeve. The lower end of the rotating arm is connected to the bearing in the sleeve via a support rod, and the other end of the rotating arm is fixedly connected to the lifting sleeve. After the screw rod is threadedly connected to the lifting sleeve, its lower end is fixedly connected to the upper cover. When the reaction material is to be put in, the operator can hold the rotating arm and rotate the upper cover to one side of the kettle body with the axis of the sleeve as the center. When the cover is to be closed, the upper cover is rotated to the top of the kettle body mouth, and then the screw rod is rotated. The upper cover is gradually moved down and sealed to cover the kettle body mouth under the drive of the screw rod, thereby achieving the effect of convenient opening and closing.

[0058] The present invention can also provide a movable sleeve on one side of the lifting sleeve, the crossbar handle is slidably connected to the movable sleeve, and limiting balls with a diameter larger than that of the movable sleeve are provided at both ends of the crossbar handle to facilitate the rotation of the upper cover.

[0059] When the present invention is used, the upper cover 2 is opened, the reaction materials are placed in the kettle body 1, and then the upper cover 2 is sealed with the kettle body 1. The control device instructs the internal heating device 3 and the stirring device 4 to operate, and the steam is pumped into the annular steam inlet pipe 3-1 through the delivery pump. The steam enters the inner heat exchange cavity and the outer heat exchange cavity through the long strip steam outlet below the annular steam inlet pipe 3-1. The fluid inside the barrel-shaped jacket 3-2 is heat exchanged through the inner heat exchange cavity, and the fluid outside the barrel-shaped jacket 3-2 is heat exchanged through the outer heat exchange cavity. The body is used for heat exchange, and under the stirring action of the stirring blades 4-2, the fluids inside and outside the barrel-shaped jacket 3-2 are disturbed by each other through the disturbance flow holes 3-6. During the stirring process, the materials that sink to the bottom of the kettle body 1 are stirred up by the scraper 10-4, so that the materials in the kettle body 1 are stirred and heated evenly, thereby realizing high-pressure rapid reaction of the materials. In addition, since the wall thickness of the barrel-shaped jacket 3-2 is only one-fourth of the thickness of the annular steam inlet pipe 3-1, the storage volume of the reaction materials in the reactor is significantly increased.

[0060] During the long-term high-pressure rotation of the stirring device 4, a small part of the high-pressure liquid in the kettle body 1 flows down through the gap between the filler 5-4 and the stirring shaft 4-1, and accumulates in the annular inner groove 5-2-1. Most of the liquid in the annular inner groove 5-2-1 guides the water collected in the annular inner groove 5-2-1 to the annular outer groove 5-2-2 through the connecting hole, and then flows into the overflow pipe 11 through the connecting pipe 5-1-2 connected to the lower end of the axial drainage hole 5-3-2, and is discharged through the overflow pipe 11; the remaining small part of the liquid continues to flow down along the surface of the stirring shaft 4-1, and when it reaches the position of the upper bearing sealing device, the downstream The liquid flows into the water receiving tray 6-2 through the guide slope on the upper bearing sealing cover 6-5-2, and then the drainage switch at the lower end of the drain pipe is opened to flow out through the drainage port and the drain pipe at the bottom of the water receiving tray 6-2, thereby preventing the liquid from flowing along the stirring shaft 4-1 to the reducer 4-3 or the ground and causing damage or pollution to the reducer 4-3 or the environment. There is no need for manual cleaning, which greatly reduces the workload of the operator. At the same time, since the upper bearing seat assembly 6-5 is far away from the packing sealing device 5, the friction between the packing 5-4 and the stirring shaft 4-1 to generate heat and affect the bearing life is avoided, so that the structure significantly improves the service life of the bearing.

[0061] When maintenance is required, it is only necessary to remove the screws connecting the protective cover 6-8. During the removal process, the overflowing liquid will not be sprayed onto the ground or the reducer 4-3, thus achieving pollution-free operation.

[0062] The present invention has the advantages of novel structure, fast heating speed, sufficient and uniform heating, small space occupied by the heating device, large material processing volume, high work efficiency, convenient leakage liquid treatment, no pollution, and long service life due to the adoption of the above structure.

Claims

1. A reaction kettle, comprising a kettle body (1), an upper cover (2), an internal heating device (3), a stirring device (4), a packing sealing device (5) and a control device, wherein the stirring device (4) is composed of a stirring shaft (4-1), a stirring blade (4-2) and a reducer (4-3), wherein the stirring shaft (4-1) is connected to the bottom of the kettle body (1) via the packing sealing device (5), the upper end of the stirring shaft (4-1) is fixedly connected to the stirring blade (4-2), and the lower end is connected to the reducer (4-3), and the reducer (4-3) is controlled by the control device, characterized in that The lower end of the kettle body (1) is provided with a leakage receiving and self-discharging device (6), which includes a connecting frame (6-1), a water receiving tray (6-2), a coupling flange (6-3), a coupling (6-4), an upper bearing seat assembly (6-5), a lower bearing seat assembly (6-6), and a drain pipe (6-7). The connecting frame (6-1) is composed of a bracket (6-1-1), an upper flange (6-1-2) and a lower flange (6-1-3). The upper end of the bracket (6-1-1) is fixedly connected to the upper flange (6-1-2), and the lower end is fixedly connected to the lower flange (6-1-3). The coupling flange (6-3) is located inside the bracket (6-1-1) and is fixedly connected to the inner wall of the bracket (6-1-1). The coupling flange (6-3) is located inside the bracket (6-1-1) and is fixedly connected to the inner wall of the bracket (6-1-1). A water receiving pan (6-2) is provided above the upper surface of the kettle body (6-3), the water receiving pan (6-2) is fixedly connected to the inner wall of the bracket (6-1-1), the connecting frame (6-1) is fixedly connected to the bottom of the kettle body (1) via the upper flange (6-1-2) by means of studs and nuts, and is fixedly connected to the reducer (4-3) via the lower flange (6-1-3) by means of bolts and nuts, the output shaft of the reducer (4-3) passes through the center of the lower flange (6-1-3) via a coupling (6-4) and is fixedly connected to the lower bearing seat assembly (6-6), the stirring shaft (4-1) passes through the packing sealing device (5) and the upper bearing seat assembly (6-5) in sequence, and the lower end of the stirring shaft (4-1) is connected to the lower bearing seat assembly (6-6), and the lower bearing seat assembly (6-6) is fixed to the coupling. On the shaft flange (6-3), the outer periphery of the upper bearing seat assembly (6-5) is fixedly connected to the center of the water receiving tray (6-2), the bottom surface of the water receiving tray (6-2) is provided with a drain port, the upper end of the drain pipe (6-7) is connected to the drain port, and the lower end is provided with a drain valve, the packing sealing device (5) comprises an overflow water outlet device (5-1), an inner shaft sleeve (5-2), an outer shaft sleeve (5-3), a packing (5-4), and a packing sealing gland (5-5), the overflow water outlet device (5-1) is composed of a connecting joint (5-1-1) and a connecting pipe (5-1-2), the outer portion of the inner shaft sleeve (5-2) is fixedly sleeved with the outer shaft sleeve (5-3), and the inner portion is fixedly sleeved with the stirring shaft (4-1), and the inner shaft sleeve (5 -2) is in contact with the packing (5-4), the inner wall of the inner sleeve (5-2) is provided with an annular inner groove (5-2-1), and the outer wall is provided with an annular outer groove (5-2-2), the annular inner groove (5-2-1) and the annular outer groove (5-2-2) are connected via a connecting hole, the lower end of the outer sleeve (5-3) is fixedly connected to the upper flange (6-1-2), and the upper end is sealed and fixedly connected to the packing gland (5-5) of the sealing sleeve on the stirring shaft (4-1), the upper part of the inner wall of the outer sleeve (5-3) is sealed and connected to the stirring shaft (4-1) via the packing (5-4), the inner wall of the outer sleeve (5-3) is provided with a transverse drainage hole (5-3-1) in the radial direction, and an axial drainage hole (5-3-2) in the axial direction,One end of the transverse drainage hole (5-3-1) is connected to the annular outer groove (5-2-2), and the other end is connected to the upper end of the axial drainage hole (5-3-2). The lower end of the axial drainage hole (5-3-2) is connected to the connecting pipe (5-1-2) via the connecting joint (5-1-1). The connecting pipe (5-1-2) is connected to the water receiving tray (6-2). The internal heating device (3) is used to perform heat exchange on the fluid in the reaction kettle.

2. A reaction kettle according to claim 1, characterized in that The internal heating device (3) is composed of an annular steam inlet pipe (3-1), a barrel-shaped jacket (3-2), an annular condensate outlet pipe (3-3), an external steam inlet pipe (3-4), and an external condensate outlet pipe (3-5); a plurality of turbulent flow holes (3-6) are arranged on the side wall of the barrel-shaped jacket (3-2); the upper end of the barrel-shaped jacket (3-2) is fixedly connected to the lower end of the annular steam inlet pipe (3-1), and the lower end is connected to the annular condensate outlet pipe (3-3); the thickness of the barrel-shaped jacket (3-2) is smaller than the tube radius of the annular steam inlet pipe (3-1) or the annular condensate outlet pipe (3-3); The upper end of the interlayer space of the barrel-shaped jacket (3-2) is connected to the steam outlet hole provided at intervals on the side wall of the annular steam inlet pipe (3-1), and the lower end is connected to the condensate inlet provided on the upper side wall of the annular condensate outlet pipe (3-3); the annular steam inlet pipe (3-1) is connected to the steam outlet of the steam inlet pipe, the annular condensate outlet pipe (3-3) is connected to the external condensate outlet pipe (3-5), the external steam inlet pipe (3-4) and the external condensate outlet pipe (3-5) are fixed on the kettle body (1), and the annular condensate outlet pipe (3-3) is fixedly connected to the inner wall of the kettle body (1) via a connecting frame (6-1).

3. A reaction kettle according to claim 2, characterized in that The barrel-shaped jacket (3-2) is composed of a supporting jacket (3-2-1), an inner jacket body (3-2-2) and an outer jacket body (3-2-3); the supporting jacket (3-2-1) is located between the inner jacket body (3-2-2) and the outer jacket body (3-2-3), so that an inner heat exchange cavity is formed between the supporting jacket (3-2-1) and the inner jacket body (3-2-2), and an outer heat exchange cavity is formed between the supporting jacket (3-2-1) and the outer jacket body (3-2-3); the upper ends of the inner heat exchange cavity and the outer heat exchange cavity are respectively connected to an annular steam outlet through a steam outlet. The inlet pipes (3-1) are connected, and the lower ends are respectively connected through the condensate inlet of the annular condensate outlet pipe (3-3); the support jacket (3-2-1) is provided with a turbulent flow hole (3-6); the inner sleeve (3-2-2) is provided with an inner turbulent flow groove; the outer sleeve (3-2-3) is provided with an outer turbulent flow groove; the centers of the inner turbulent flow groove, the turbulent flow hole (3-6) and the outer turbulent flow groove are on the same center line; the outer turbulent flow groove and the inner turbulent flow groove are respectively extended in a disc shape toward the periphery of the turbulent flow hole (3-6) and are sealed and fixed.

4. A reaction kettle according to claim 1, 2 or 3, characterized in that The upper bearing seat assembly (6-5) comprises a thrust bearing (6-5-1), an upper bearing sealing cover (6-5-2), and an upper bearing seat (6-5-3); the upper bearing seat (6-5-3) is sleeved on the stirring shaft (4-1); the outer periphery of the upper bearing seat (6-5-3) is fixedly connected to the water receiving tray (6-2); the upper end of the upper bearing seat (6-5-3) is connected to the lower ring of the thrust bearing (6-5-1); the upper ring of the thrust bearing (6-5-1) is fixedly connected to the upper bearing sealing cover (6-5-2) sleeved on the stirring shaft (4-1); the upper end of the upper bearing sealing cover (6-5-2) is fixedly abutted against the shaft shoulder on the stirring shaft (4-1); the outer diameter of the upper end of the upper bearing sealing cover (6-5-2) is smaller than the diameter of the shaft shoulder of the stirring shaft; the outer wall of the upper bearing sealing cover (6-5-2) is inclined from top to bottom and from the center to the periphery to form a guide slope.

5. A reaction kettle according to claim 4, characterized in that An overflow pipe (11) is provided, the upper end of the overflow pipe (11) passes through the bottom surface of the water receiving tray (6-2), the upper end of the overflow pipe (11) is lower than the upper end surface of the water receiving tray (6-2), and a drain valve is provided at the lower end.

6. A reaction kettle according to claim 5, characterized in that The lower end of the connecting pipe (5-1-2) is inserted into the overflow pipe (11).

7. A reaction kettle according to claim 4, characterized in that A conical protective sleeve (6-5-4) is provided at the lower end of the upper bearing sealing cover (6-5-2); the conical protective sleeve (6-5-4) is located above the upper bearing seat (6-5-3) and covers the upper bearing seat (6-5-3); the small diameter end of the conical protective sleeve (6-5-4) is fixedly connected to the large diameter end of the upper bearing sealing cover (6-5-2).

8. A reaction kettle according to claim 1 or 2 or 3 or 5 or 6 or 7, characterized in that The connection frame (6-1) is externally covered with a protective cover (6-8), the protective cover (6-8) being formed by at least two semi-annular cover plates connected relatively to each other, the upper ends of the semi-annular cover plates being fixedly connected to the upper flange (6-1-2) via screws, and the lower ends being fixedly connected to the lower flange (6-1-3) via screws, and the semi-annular cover plates being externally provided with a handle.

9. A reaction kettle according to claim 8, characterized in that The bottom of the kettle body (1) is provided with an automatic cleaning device (10), which comprises a conical trough body (10-1), a fixing plate (10-2), a connecting plate (10-3), a scraper (10-4), and a sewage discharge pipe (10-5). The outer wall of the conical trough body (10-1) is inclined outward to form a bowl-shaped shape. The upper end of the conical trough body (10-1) is fixedly connected to the center of the lower end of the kettle body (1). A sewage discharge pipe (10-5) is provided on one side of the lower part of the conical trough body (10-1). -5), a sewage switch is provided on the sewage pipe (10-5), the fixed plate (10-2) is fixed to the lower end of the stirring blade (4-2) or one side of the stirring shaft, the upper end of the connecting plate (10-3) is cross-fixedly connected to the fixed plate (10-2), and the lower end is cross-fixedly connected to the scraper (10-4), the side wall of the scraper (10-4) is matched with the inner wall of the conical groove, and the lower end of the scraper (10-4) is matched with the bottom surface of the conical groove body (10-1).

10. A reaction kettle according to claim 1 or 9, characterized in that The outer wall of the kettle body (1) is provided with an external heating device (8).

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