Reaction kettle easy to maintain

Abstract

The utility model discloses a reaction kettle easy to maintain, and belongs to the technical field of organic synthesis. Comprising a reaction kettle, a discharge port, a driving structure, a feed port, an inspection manhole, a stirring shaft, a plurality of stirring blades, a bearing seat, an auxiliary inspection hole, a suspension chain, a stirring shaft support and a blade support, the upper end of the stirring shaft is coaxially fixed with a driving shaft of the driving structure through a coupler, and the lower end is rotationally connected with a bearing seat through a sealing bearing; during maintenance; mounting a suspension chain, a stirring shaft support and a blade support; the stirring shaft is separated from the driving shaft and located on the right side of the driving shaft, and the lower end of the stirring shaft is arranged on the stirring shaft support; the right ends of one or more stirring blades on the right side abut against the inner wall of the reaction kettle and abut against the lower side or the upper side of the corresponding blade support, the suspension chain is vertically arranged, and the lower end of the suspension chain is connected with the stirring blade at the top end of the right side; during normal use, the suspension chain, the stirring shaft support and the blade support are all detached.

Description

Technical Field

[0001] This invention belongs to the field of organic synthesis technology, and specifically relates to a reaction vessel that is easy to maintain. Background Technology

[0002] Reactors are widely used in the production of petroleum, chemicals, rubber, pesticides, dyes, pharmaceuticals, and food. They are containers used to complete processes such as hydrolysis, neutralization, crystallization, distillation, evaporation, storage, hydrogenation, hydrocarbonation, polymerization, condensation, heating and mixing, and isothermal reactions. Reactors are essential equipment in the chemical industry.

[0003] For example, patent application number CN201020608327.4 discloses a reaction vessel for crude and refined chemical production, including a tank body. The tank body has a hollow structure, and a support base is provided on the upper surface of the tank body. A hollow frame is connected to the upper surface of the support base. A reducer is provided on the upper part of the hollow frame. The reduction shaft of the reducer is placed in the frame. One end of the reduction shaft is connected to a stirring shaft through a coupling. The other end of the stirring shaft passes through the support base and is placed in the tank body, and is connected to a bearing seat. The inner bottom of the tank body... The tank is equipped with a support frame, and the bearing seat is fixed in the support frame. The stirring shaft and the support seat are sealed by a seal. The stirring shaft located in the tank is equipped with at least two stirring blades. The inner wall of the tank is equipped with at least one baffle. The bottom of the tank is equipped with a discharge port, which corresponds to the stirring shaft. The outer wall of the tank is equipped with a hollow jacket or hollow coil. The upper surface of the tank is equipped with a manhole, two spare ports, a feed port, a distillation port, two thermometer ports, and a sight glass along the circumference of the support seat.

[0004] For example, patent application number CN201220656457.4 discloses a paraffin reaction vessel, including a reaction vessel body and a vessel cover; the bottom of the reaction vessel body is provided with a discharge pipe; the upper part of the vessel cover is provided with a feed pipe; the center of the reaction vessel body is provided with a stirring shaft, one end of which is connected to the bottom of the reaction vessel body through a bearing seat; the other end of the stirring shaft passes through the vessel cover and is connected to the rotating shaft of a motor provided on the vessel cover through a coupling; a number of stirring blades are installed on the stirring shaft; the vessel cover is also provided with electric heating rods that extend into the reaction vessel body and are located at both ends of the reaction vessel body.

[0005] For example, patent application number CN201920403054.0 discloses a hollow spiral internally heated blade reactor, including a tank body, a tank cover disposed on the top of the tank body, and a surrounding pipe assembly disposed on the outer surface of the tank body. The bottom of the tank body has a discharge port communicating with its interior, and the top of the tank cover has a feed port communicating with its interior. The outer wall of the tank body has an external heat transfer oil outlet and an external heat transfer oil inlet communicating with its interior, respectively, near the top and near the bottom. The top of the tank cover has a hollow drive shaft communicating with the interior of the tank body through a sealing assembly. The top of the drive shaft has an internal heat transfer oil inlet communicating with its interior. The outer wall of the drive shaft is located near the bottom and near the top of the tank body. Near the top, there is an internal heat transfer oil outlet communicating with its interior. The bottom surface of the tank body is supported by a hollow stirring shaft that rotates relative to it. The drive shaft has an inner tube extending into the stirring shaft. The outer wall of the inner tube and the inner walls of the drive shaft and stirring shaft are connected to a first flow channel communicating with the internal heat transfer oil outlet. The stirring shaft has stirring blades arranged in a spiral shape and communicating with the internal cavity of the stirring shaft. The stirring blades have a baffle inside. The baffle has small holes evenly distributed at the end away from the stirring shaft. The baffle, the small holes and the inner wall of the stirring blades form a second flow channel through which heat transfer oil flows from top to bottom and communicates with the first flow channel.

[0006] As can be seen from the above patents, existing reaction vessels include a reaction vessel, a discharge port at the bottom of the reaction vessel, a drive structure at the top of the reaction vessel, a feed port at the top of the reaction vessel, a maintenance manhole at the top of the reaction vessel, a stirring shaft inside the reaction vessel, multiple stirring blades on the stirring shaft, and a bearing seat at the bottom of the reaction vessel. The stirring shaft is coaxially arranged with the reaction vessel, its upper end is coaxially fixed to the drive shaft of the drive structure extending into the reaction vessel via a coupling, and its lower end is rotatably connected to the bearing seat via a sealed bearing.

[0007] During actual production, the applicant discovered that the sealed bearings were very prone to damage when immersed in the reaction liquid for a long time; therefore, it was necessary to remove the stirring shaft from the bearing housing. However, the space inside the reactor was limited, and it was not easy to place the removed stirring shaft and its blades. Utility Model Content

[0008] To address the aforementioned problems, this utility model provides an easy-to-maintain reaction vessel that allows for the fixing of the stirring shaft and its blades during maintenance, facilitating the replacement of the sealed bearing. The technical solution is as follows:

[0009] This utility model embodiment provides an easy-to-maintain reactor, including a reactor 1, a discharge port 2 at the bottom of the reactor 1, a drive structure 3 at the top of the reactor 1, a feed port at the top of the reactor 1, a maintenance manhole 4 at the top of the reactor 1, a stirring shaft 5 inside the reactor 1, multiple stirring blades 6 on the stirring shaft 5, and a bearing seat 7 at the bottom of the reactor 1. The stirring shaft 5 is coaxially arranged with the reactor 1, and its upper end is coaxially fixed to the drive shaft 9 of the drive structure 3 extending into the reactor 1 via a coupling 8. Its lower end is rotatably connected to the bearing seat 7 via a sealed bearing. An auxiliary maintenance hole 10 is provided at the top of the reactor 1 and on the right side of the drive structure 3. A suspension chain 11 is detachably provided on the auxiliary maintenance hole 10. A stirring shaft support 12 is detachably provided on the bearing seat 7. 12 is located on the right side of bearing seat 7. The lower end of the suspension chain 11 can be detachably connected to the top stirring blade 6. The right inner wall of the reactor 1 is detachably provided with blade support 13. The auxiliary inspection hole 10 is located on the upper right of the stirring shaft support 12. During maintenance, the suspension chain 11, stirring shaft support 12 and blade support 13 are installed. The stirring shaft 5 is separated from the drive shaft 9 and is located on the right side of the drive shaft 9. Its lower end is placed on the stirring shaft support 12. The right end of one or more stirring blades 6 on the right side abuts against the inner wall of the reactor 1 and abuts against the lower or upper side of the corresponding blade support 13. The suspension chain 11 is vertically arranged and its lower end is connected to the stirring blade 6 at the top right side. During normal use, the suspension chain 11, stirring shaft support 12 and blade support 13 are all removed.

[0010] In this embodiment of the invention, the maintenance manhole 4 is located on the top left side of the reactor 1.

[0011] Preferably, in this embodiment of the present invention, the feed inlet and the auxiliary inspection hole 10 are the same.

[0012] In this embodiment of the present invention, the bearing seat 7 includes a bracket 71 and a bearing sleeve 72 thereon. The bracket 71 is fixed to the bottom of the reactor 1 and is located directly above the outlet 2. The bearing sleeve 72 is coaxially arranged with the stirring shaft 5 and is rotatably connected to the lower end of the stirring shaft 5 through a sealed bearing. Its upper end extends upward relative to the bracket 71. The stirring shaft support 12 includes a fixing ring 21 that cooperates with the bearing sleeve 72, a support arm 22 on the right side of the fixing ring 21, a support rod 23 arranged vertically below the support arm 22, and a groove 24 on the upper side of the support arm 22 that cooperates with the lower end of the stirring shaft 5. The fixing ring 21 is sleeved on the upper end of the bearing sleeve 72 and is placed on the top of the bracket 71. The lower end of the support rod 23 rests against the bottom of the reactor 1. During maintenance, the lower end of the stirring shaft 5 is inserted into the groove 24.

[0013] Preferably, in this embodiment of the present invention, the upper end of the bearing sleeve 72 and the inner side of the fixing ring 21 are provided with a positioning block 25 and a positioning notch 26 that cooperate with each other; when the positioning block 25 is embedded in the positioning notch 26, the support body 24 is located on the lower side of the stirring shaft 6.

[0014] In this embodiment of the present invention, the bracket 71 is a triangular pyramid bracket or a rectangular bracket.

[0015] Specifically, in this embodiment of the present invention, the support 71 is a triangular pyramid support with its three edges evenly distributed around the bearing sleeve 72, gradually approaching the bearing sleeve 72 from bottom to top; the lower end of the edge of the support 71 is fixed to the bottom of the reactor 1, and its upper end is fixed to the upper part of the bearing sleeve 72.

[0016] In this embodiment of the invention, the auxiliary inspection hole 10 is a human hole; the upper end of the suspension chain 11 is provided with an end cap that cooperates with the auxiliary inspection hole 10, and the lower end is provided with a lower hook or connector that cooperates with the stirring blade 6; the lower side of the end cap is provided with a hanging ring and is detachably provided on the auxiliary inspection hole 10, and the upper end of the suspension chain 11 is detachably provided on the hanging ring through the upper hook; the lower hook or connector is detachably connected to the stirring blade 6.

[0017] In this embodiment of the invention, the blade support 13 is detachably mounted on the inner wall of the reactor 1 by means of magnetic attraction, locking, clamping or threaded connection.

[0018] Specifically, in this embodiment of the present invention, the blade support 13 includes a connecting part and a limiting part on its inner side. The right inner wall of the reactor 1 and the location corresponding to the blade support 13 are provided with a fixing part that cooperates with the connecting part. The fixing part is a strip-shaped block arranged in a vertical direction. The connecting part is slidably disposed on the fixing part and is detachably connected to the fixing part. It is locked and fixed by a locking bolt. The limiting part is located on the upper side of the right end of the corresponding stirring blade 6 and has a limiting groove on its lower side that cooperates with the stirring blade 6. During maintenance, the upper side of the right end of the corresponding stirring blade 6 is located in the limiting groove and abuts against the lower side of the limiting part.

[0019] The beneficial effects of the technical solution provided by this utility model embodiment are as follows: This utility model embodiment provides an easy-to-maintain reaction vessel, which allows for the fixing of the stirring shaft and its blades during maintenance to facilitate the replacement of the sealed bearing. The suspension chain, stirring shaft support, and blade support can all be removed without affecting normal production. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of the easy-to-maintain reactor in this embodiment during normal use;

[0021] Figure 2This is a schematic diagram of the easily maintained reactor in this embodiment during maintenance.

[0022] Figure 3 yes Figure 2 A magnified view of a portion of the image;

[0023] Figure 4 This is a schematic diagram of the structure supporting the stirring shaft;

[0024] Figure 5 This is a schematic diagram of another type of stirring shaft support structure;

[0025] Figure 6 This is a schematic diagram of the suspension chain structure;

[0026] Figure 7 This is a schematic diagram of the blade support structure.

[0027] In the diagram: 1. Reactor, 2. Discharge port, 3. Drive structure, 4. Manhole, 5. Stirring shaft, 6. Stirring blade, 7. Bearing housing, 8. Coupling, 9. Drive shaft, 10. Auxiliary inspection hole, 11. Suspension chain, 12. Stirring shaft support, 13. Blade support;

[0028] 21. Fixing ring; 22. Support arm; 23. Support rod; 24. Groove; 25. Positioning block; 26. Positioning notch;

[0029] 71 Bracket, 72 Bearing sleeve. Detailed Implementation

[0030] To make the objectives, technical solutions and advantages of this utility model clearer, the utility model will be described in further detail below with reference to the accompanying drawings.

[0031] Example 1

[0032] See Figure 1-7Example 1 provides an easy-to-maintain reactor, including a reactor 1, a discharge port 2, a drive structure 3, a feed port (not shown), a manhole 4, a stirring shaft 5, multiple stirring blades 6, a bearing housing 7, an auxiliary maintenance hole 10, a suspension chain 11, a stirring shaft support 12, and a blade support 13. The reactor 1 is vertically oriented. The discharge port 2 is located at the bottom of the reactor 1. The drive structure 3 is located at the top of the reactor 1 and includes a motor and a reducer. The feed port is located at the top of the reactor 1. The manhole 4 is located on the top left side of the reactor 1 and is sized to allow passage. The auxiliary maintenance hole 10 is located on the top right side of the reactor 1 and can be relatively small. The stirring shaft 5 is located inside the reactor 1, coaxially with it. Its upper end is coaxially fixed to the drive shaft 9 of the drive structure 3, which extends into the reactor 1, via a coupling 8 (specifically, a clamp coupling). Its lower end is rotatably connected to the bearing seat 7 via a sealed bearing. Multiple stirring blades 6 are mounted on the stirring shaft 5. Specifically, the multiple stirring blades 6 are distributed in multiple layers, with each layer including 2-6 stirring blades 6 evenly distributed around the stirring shaft 5. The bearing seat 7 is located at the bottom of the reactor 1, directly above the discharge port 2, and includes a support 71 and a bearing sleeve 72 on it. A suspension chain 11 is detachably mounted on the auxiliary inspection hole 10, and a stirring shaft support 12 is detachably mounted on the bearing seat 7. The stirring shaft support 12 is located on the right side of the bearing seat 7. The lower end of the suspension chain 11 can be detachably connected to the top stirring blade 6. One or more blade supports 13 are detachably mounted on the right inner wall of the reactor 1 to support or limit one or more stirring blades 6. The auxiliary inspection hole 10 is located to the upper right of the stirring shaft support 12. During maintenance, the suspension chain 11, stirring shaft support 12, and blade support 13 are installed, and the coupling 8 is removed. The stirring shaft 5 is separated from the drive shaft 9 and is located on the right side of the drive shaft 9. Its upper part is parallel to the drive shaft 9, and its lower end is placed on the stirring shaft support 12. The right end of one or more stirring blades 6 on the right side abuts against the inner wall of the reactor 1 and against the lower or upper side of the corresponding blade support 13. The suspension chain 11 is vertically arranged, and its lower end is connected to the top stirring blade 6 on the right side. During normal use, the suspension chain 11, the stirring shaft support 12, and the blade support 13 are all removed, and the auxiliary inspection hole 10 is closed.

[0033] In this embodiment of the invention, the support 71 is fixed to the bottom of the reactor 1, located directly above the discharge port 2. It is a triangular pyramidal support or a rectangular support, etc. The bearing sleeve 72 is coaxially arranged with the stirring shaft 5, and is rotatably connected to the lower end of the stirring shaft 5 via a sealed bearing. Its upper end extends upward relative to the support 71. See also... Figure 1-5The stirring shaft support 12 includes a fixing ring 21 that mates with the bearing sleeve 72, a support arm 22 on the right side of the fixing ring 21, a vertically arranged support rod 23 on the lower side of the support arm 22, and a groove 24 on the upper side of the support arm 22 that mates with the lower end of the stirring shaft 5. The fixing ring 21 is fitted onto the upper end of the bearing sleeve 72 and is located on top of the bracket 71. Specifically, it is a circular ring that is clearance-fitted with the bearing sleeve 72. The support arm 22 is arranged in a left-right direction. The groove 24 can be a circular groove or a U-shaped groove that opens to the right. The lower end of the support rod 23 (which may be provided with a support plate) rests against the bottom of the reactor 1. During maintenance, the lower end of the stirring shaft 5 is inserted into the groove 24. Preferably, the upper end of the bearing sleeve 72 and the inner side of the fixing ring 21 are provided with a positioning block 25 and a positioning notch 26 that mate with each other to prevent the stirring shaft support 12 from rotating. When the positioning block 25 is inserted into the positioning notch 26, the support body 24 is located exactly below the stirring shaft 6. Specifically, a positioning block 25 is provided on the upper left side of the bearing sleeve 72 along the left-right direction, and correspondingly, a positioning notch 26 is provided on the inner left side of the fixing ring 21 along the left-right direction. The positioning block 25 is specifically a rectangular block, and the positioning notch 26 is specifically a rectangular notch.

[0034] In this embodiment of the invention, the auxiliary inspection hole 10 is a human hole. The upper end of the suspension chain 11 is provided with an end cap that mates with the auxiliary inspection hole 10, and the lower end is provided with a lower hook or connector that mates with the stirring blade 6. A hanging ring is provided on the lower side of the end cap and is detachably mounted on the auxiliary inspection hole 10. The upper end of the suspension chain 11 is detachably mounted on the hanging ring via an upper hook. The lower hook or connector is detachably connected to the stirring blade 6.

[0035] In this embodiment of the invention, the blade support 13 is detachably mounted on the inner wall of the reactor 1 by means of magnetic attraction, locking, clamping or threaded connection.

[0036] Example 2

[0037] Example 2 provides an easy-to-maintain reactor, whose structure is basically the same as that of Example 1, except that the feed inlet and auxiliary inspection hole 10 in this example are the same.

[0038] Example 3

[0039] Example 3 provides an easy-to-maintain reactor, whose structure is basically the same as that of Example 1, except that: in this example, the support 71 is a triangular pyramid support, with its three edges evenly distributed around the bearing sleeve 72, gradually approaching the bearing sleeve 72 from bottom to top. The lower end of the edge of the support 71 is fixed to the bottom of the reactor 1, and its upper end is fixed to the upper part of the bearing sleeve 72.

[0040] Example 4

[0041] See Figure 4Example 4 provides an easy-to-maintain reaction vessel, whose structure is basically the same as that of Example 1, except that the groove 24 in this example is a circular groove.

[0042] Example 5

[0043] See Figure 5 Example 5 provides an easy-to-maintain reactor, whose structure is basically the same as that of Example 1, except that the groove 24 in this example is a U-shaped groove that opens to the right.

[0044] Example 6

[0045] Example 6 provides an easy-to-maintain reactor, whose structure is basically the same as that of Example 1, except that: the blade support 13 in this example includes a connecting part and a limiting part on its inner side, etc., and a fixing part that cooperates with the connecting part is provided on the right inner wall of the reactor 1 at the location corresponding to the blade support 13. The fixing part is a strip block or slide rail arranged in the vertical direction. The connecting part (specifically, it can be a slide block) is slidably disposed on the fixing part and is detachably connected to the fixing part. It is locked and fixed by locking bolts. The limiting part is located on the upper side of the right end of the corresponding stirring blade 6, and a limiting groove that cooperates with the stirring blade 6 is provided on its lower side. During maintenance, the upper side of the right end of the corresponding stirring blade 6 is located in the limiting groove and abuts against the lower side of the limiting part.

[0046] Example 7

[0047] Example 7 provides an easy-to-maintain reactor, whose structure is basically the same as that of Example 1, except that the multiple stirring blades 6 in this example are distributed in three layers. There is one blade support 13, which is located on the upper right side of the rightmost stirring blade 6 in the bottom layer.

[0048] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. An easy-to-maintain reaction kettle, comprising a reaction kettle (1), a discharge port (2) at the bottom of the reaction kettle (1), a driving structure (3) at the top of the reaction kettle (1), a feed inlet at the top of the reaction kettle (1), an inspection manhole (4) at the top of the reaction kettle (1), a stirring shaft (5) in the reaction kettle (1), a plurality of stirring blades (6) on the stirring shaft (5), and a bearing seat (7) at the bottom of the reaction kettle (1); the stirring shaft (5) is coaxially arranged with the reaction kettle (1), the upper end thereof is coaxially fixed with a driving shaft (9) extending into the reaction kettle (1) through a coupling (8) and the driving structure (3), and the lower end thereof is rotatably connected with the bearing seat (7) through a sealing bearing; characterized in that, an auxiliary inspection hole (10) is arranged at the top of the reaction kettle (1) and on the right side of the driving structure (3), a hanging chain (11) is detachably arranged on the auxiliary inspection hole (10), a stirring shaft support (12) is detachably arranged on the bearing seat (7), the stirring shaft support (12) is arranged on the right side of the bearing seat (7), the lower end of the hanging chain (11) is detachably connected with the stirring blades (6) at the top, a blade support (13) is detachably arranged on the right inner wall of the reaction kettle (1), and the auxiliary inspection hole (10) is arranged above the right side of the stirring shaft support (12). During inspection, the hanging chain (11), the stirring shaft support (12) and the blade support (13) are installed, the stirring shaft (5) is separated from the driving shaft (9) and arranged on the right side of the driving shaft (9), the lower end of the stirring shaft (5) is arranged on the stirring shaft support (12), the right end of one or more stirring blades (6) on the right side abuts against the inner wall of the reaction kettle (1) and the corresponding blade support (13) on the lower side or the upper side, and the hanging chain (11) is arranged vertically and connected with the stirring blades (6) at the top on the right side. During normal use, the hanging chain (11), the stirring shaft support (12) and the blade support (13) are all removed.

2. The easy-to-maintain reactor of claim 1, wherein, The inspection manhole (4) is arranged on the left side of the top of the reaction kettle (1).

3. The easy-to-maintain reactor of claim 1, wherein, The feed inlet and the auxiliary inspection hole (10) are the same.

4. The easy-to-maintain reaction vessel according to claim 1, characterized in that The bearing seat (7) comprises a bracket (71) and a bearing sleeve (72) on the bracket (71), the bracket (71) is fixed on the bottom of the reaction kettle (1) and arranged directly above the discharge port (2), the bearing sleeve (72) is coaxially arranged with the stirring shaft (5), rotatably connected with the lower end of the stirring shaft (5) through a sealing bearing, and the upper end thereof extends upward relative to the bracket (71), the stirring shaft support (12) comprises a fixing ring (21) matched with the bearing sleeve (72), a support arm (22) on the right side of the fixing ring (21), a support rod (23) arranged vertically on the lower side of the support arm (22), and a groove (24) on the upper side of the support arm (22) matched with the lower end of the stirring shaft (5), the fixing ring (21) is sleeved on the upper end of the bearing sleeve (72) and arranged on the top of the bracket (71), and the lower end of the support rod (23) abuts against the bottom of the reaction kettle (1); during inspection, the lower end of the stirring shaft (5) is inserted into the groove (24).

5. The easy-to-maintain reactor of claim 4, wherein, The upper end of the bearing sleeve (72) is provided with a positioning block (25) and a positioning notch (26) on the inner side of the fixed ring (21), which match with each other; when the positioning block (25) is embedded into the positioning notch (26), the groove (24) is just located at the lower side of the stirring shaft (5).

6. The easy-to-maintain reaction vessel according to claim 4, characterized in that The support (71) is a triangular pyramid support or a rectangular support.

7. The easy-to-maintain reaction vessel according to claim 4, characterized in that The support (71) is a triangular pyramid support, and the three edges of the triangular pyramid support are evenly distributed around the bearing sleeve (72), and gradually approach the bearing sleeve (72) from bottom to top; the lower end of the edge of the support (71) is fixed on the bottom of the reaction kettle (1), and the upper end is fixed on the upper part of the bearing sleeve (72).

8. The easy to maintain reactor vessel as claimed in claim 1 wherein, The auxiliary manhole (10) is a manhole; the upper end of the suspension chain (11) is provided with an end cover matched with the auxiliary manhole (10), and the lower end is provided with a lower hook or a connecting piece matched with the stirring blade (6); the lower side of the end cover is provided with a hanging ring, and the hanging ring is detachably arranged on the auxiliary manhole (10); the upper end of the suspension chain (11) is detachably arranged on the hanging ring through an upper hook; the lower hook or the connecting piece is detachably connected with the stirring blade (6).

9. The easy to maintain reactor vessel as claimed in claim 1 wherein, The blade support (13) is detachably arranged on the inner wall of the reaction kettle (1) by magnetic attraction, locking, clamping or threaded connection.

10. The easy-to-maintain reactor of claim 9, wherein, The blade support (13) comprises a connecting part and a limiting part on the inner side of the connecting part; the right inner wall of the reaction kettle (1) and the corresponding blade support (13) are provided with a fixed part matched with the connecting part; the fixed part is a strip-shaped block arranged in the vertical direction; the connecting part is slidingly arranged on the fixed part, and is detachably connected with the fixed part and locked and fixed by a locking bolt; the limiting part is located on the upper side corresponding to the right end of the stirring blade (6), and the lower side is provided with a limiting groove matched with the stirring blade (6); during maintenance, the right end of the stirring blade (6) is located in the limiting groove and abuts against the lower side of the limiting part.

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