CN219129250U - PPH reaction kettle with liquid seal - Google Patents

Abstract

The utility model relates to a PPH reaction kettle with a liquid seal. The PPH reaction kettle with the liquid seal comprises a reaction kettle main body, a seal structure, a stirring paddle and a stirring driving piece. The sealing structure comprises a sealing base and a sealing cap. The sealing base is penetrated and fixed in the mounting hole in a sealing way. The sealing base is provided with a through hole. An annular groove is formed at the end part of one end of the sealing base, which is away from the reaction cavity, along the circumferential direction of the through hole. The open end is inserted into the annular groove to form a sealed pressure relief channel with the inner wall of the annular groove. The stirring paddle comprises a stirring shaft and a paddle structure. One end of the stirring shaft penetrates through the connecting hole and is fixedly connected with the closed end in a sealing way, and the other end of the stirring shaft penetrates through the through hole and stretches into the reaction cavity to be fixedly connected with the blade structure. The stirring driving piece is in transmission connection with the stirring shaft and is used for driving the blade structure to stir the materials in the reaction cavity. The arrangement of the sealing structure ensures that the PPH reaction kettle with the liquid seal has better sealing effect, sealing reliability and safety performance.

Description

PPH reaction kettle with liquid seal

Technical Field

The utility model relates to the technical field of reaction kettles, in particular to a PPH reaction kettle with a liquid seal.

Background

PPH is reinforced and toughened polypropylene, beta modification is carried out on the basis of PP, and the rigidity, strength and toughness of the material are improved in an omnibearing way. The PPH material has excellent corrosion resistance, oxidation resistance and acid-base resistance, has remarkable advantages in the aspects of UV resistance, ageing resistance, service life and stress resistance, and is more suitable for being used as a raw material of a production workshop, a reaction tank of waste liquid, a stirring tank, a large storage tank and the like in chemical industry and energy industry.

In a traditional PPH reaction kettle, in order to isolate external air from entering the kettle tank through the joint between the stirrer and the kettle tank, an elastic sealing structure is usually arranged at the joint between the stirrer and the kettle tank. However, the stirrer can rotate relative to the kettle in the operation process of the PPH reaction kettle, and at the moment, the elastic seal between the stirrer and the kettle becomes dynamic seal, so that the sealing effect is affected, the elastic seal structure is easy to damage, and the sealing reliability is not strong.

Disclosure of Invention

Based on the above, it is necessary to provide a PPH reactor with a liquid seal which has a good sealing effect and is reliable in sealing.

A PPH reaction kettle with liquid seal comprises a reaction kettle main body, a seal structure, a stirring paddle and a stirring driving piece;

the reaction kettle body is internally provided with a reaction cavity; the top end of the reaction kettle main body is provided with a mounting hole communicated with the reaction cavity;

the sealing structure comprises a sealing base and a sealing cap which is hollow in the interior and is provided with an open end and a closed end; the sealing base is penetrated and fixed in the mounting hole in a sealing way; the sealing base is provided with a through hole capable of communicating the outside with the reaction cavity; an annular groove is formed in the end part of one end of the sealing base, which is away from the reaction cavity, along the circumferential direction of the through hole; the opening end is inserted into the annular groove so as to form a sealed pressure relief channel which can be communicated with the outside and the through hole with the inner wall of the annular groove; the annular groove is used for containing sealing liquid which can submerge the end part of the opening end so as to seal the sealing pressure release channel with the liquid; the closed end is provided with a connecting hole communicated with the through hole;

the stirring paddle comprises a stirring shaft and a paddle structure; one end of the stirring shaft penetrates through the connecting hole and is fixedly connected with the closed end in a sealing way, and the other end of the stirring shaft penetrates through the through hole and stretches into the reaction cavity to be fixedly connected with the blade structure; the stirring shaft is in clearance fit with the through hole;

the stirring driving piece is in transmission connection with the stirring shaft and is used for driving the blade structure to stir materials in the reaction cavity.

In some embodiments, the sealing base comprises an outer cylinder, an inner cylinder and a connecting bottom plate in a ring shape; the outer cylinder and the inner cylinder are both cylindrical structures with two open ends; the outer cylinder penetrates through and is fixed in the mounting hole in a sealing manner; the inner cylinder penetrates through the outer cylinder, and the outer wall of the inner cylinder is in clearance fit with the inner wall of the outer cylinder; the bottom plate is fixed between the outer cylinder and the inner cylinder in a sealing way; the annular groove is formed by surrounding the inner wall of the outer cylinder, the surface of one side of the bottom plate, which is away from the reaction cavity, and the outer wall of the inner cylinder; the inner wall of the inner cylinder is surrounded to form the through hole.

In some embodiments, one end of the outer cylinder and one end of the inner cylinder extend into the reaction cavity; the connecting bottom plate is arranged at one end of the outer barrel, which is close to the blade structure.

In some embodiments, in the axial direction of the stirring shaft; the height of the outer cylinder at one end outside the reaction kettle body is lower than that of the inner cylinder at one end inside the sealing cap.

In some embodiments, the sealing cap includes a top plate and a side plate disposed along a circumferential direction of the top plate and connected to the top plate; the top plate and the side plates are surrounded to form the sealing cap with a hollow inside; the top plate is provided with a connecting hole; one end of the side plate connected with the top plate is the closed end; one end of the side plate, which is away from the top plate, is an open end.

In some embodiments, further comprising an annular mounting plate; the annular mounting plate is sleeved on the stirring shaft and fixedly connected with the stirring shaft; the annular mounting plate is detachably connected with the closed end, and one side surface of the annular mounting plate, which faces the sealing base, and one side surface of the closed end, which faces away from the sealing base, are mutually attached.

In some embodiments, the annular mounting plate is a flange plate arranged along the circumferential direction of the stirring shaft and connected with the stirring shaft into a whole; one side of the flange plate, which faces the sealing base, is detachably connected with one end of the closed end, which faces away from the sealing base.

In some embodiments, further comprising a mounting bracket mounted on the seal base; the stirring driving piece is arranged on the mounting bracket, and the opening end is suspended in the annular groove.

In some embodiments, the outer wall of the sealing base is provided with a mounting portion in the circumferential direction; the mounting bracket is detachably mounted on the mounting portion.

In some embodiments, a flow blocking plate is vertically arranged on the inner wall of the reaction cavity.

The PPH reaction kettle with the liquid seal is injected into the annular groove when in use until the opening end of the sealing cap is positioned below the liquid level of the sealing liquid, and the sealing liquid can play a sealing role on the sealing pressure release channel at the moment so as to prevent external air from entering the reaction cavity through the joint between the stirring shaft and the reaction kettle body. Moreover, when stirring driving piece drive (mixing) shaft drives the paddle structure and stirs the material of reaction chamber, the (mixing) shaft can drive the sealed cap and rotate in the annular groove, and the sealed liquid in the annular groove still can keep better sealed effect this moment, and simultaneously in the material stirring in-process if the pressure in the reaction chamber is too big then can carry out the pressure release through the mode of through-hole and sealed pressure release passageway to external exhaust gas to guarantee that the pressure in the reaction chamber can not cause the influence to the stirring work of material, eliminate the potential safety hazard. Therefore, the sealing structure has the functions of sealing and pressure relief, and can improve the sealing effect, sealing reliability and safety performance of the PPH reaction kettle with the liquid seal.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the application. Also, like reference numerals are used to designate like parts throughout the accompanying drawings. In the drawings:

FIG. 1 is a schematic structural view of a PPH reactor with liquid seal in a preferred embodiment of the present utility model;

FIG. 2 is a schematic structural view of a reactor body in the PPH reactor with liquid seal shown in FIG. 1;

FIG. 3 is a view showing an installation state of a sealing structure in the PPH reaction kettle with liquid seal shown in FIG. 1;

FIG. 4 is a schematic structural view of a sealing structure in the PPH reaction kettle with liquid seal shown in FIG. 1;

fig. 5 is a schematic structural view of the seal base in the seal structure shown in fig. 4.

Reference numerals in the detailed description indicate: 100. PPH reaction kettle with liquid seal; 110. a reaction kettle main body; 111. a reaction chamber; 112. a mounting hole; 113. a feed inlet; 114. a discharge port; 120. a sealing structure; 121. sealing the base; 1211. a through hole; 1212. an annular groove; 1213. an outer cylinder; 1214. an inner cylinder; 1215. a connecting bottom plate; 1216. a mounting part; 122. a sealing cap; 1221. an open end; 1222. a closed end; 1223. a connection hole; 1224. a top plate; 1225. a side plate; 123. sealing the pressure release channel; 130. stirring paddles; 131. a stirring shaft; 132. a paddle structure; 140. a stirring driving member; 150. an annular mounting plate; 160. a mounting bracket; 170. a spoiler; 200. sealing the liquid.

Detailed Description

In order that the utility model may be readily understood, a more complete description of the utility model will be rendered by reference to the appended drawings. Preferred embodiments of the present utility model are shown in the drawings. This utility model may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this utility model belongs. The terminology used herein in the description of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.

When an element is referred to as being "on" another element, it can be directly on the other element or intervening elements may also be present unless otherwise specified. It will also be understood that when an element is referred to as being "between" two elements, it can be the only one between the two elements or one or more intervening elements may also be present.

Where the terms "comprising," "having," and "including" are used herein, another component may also be added unless explicitly defined as such, e.g., "consisting of … …," etc. Unless mentioned to the contrary, singular terms may include plural and are not to be construed as being one in number.

Further, the drawings are not 1:1, and the relative dimensions of the various elements are drawn by way of example only in the drawings and are not necessarily drawn to true scale.

FIG. 1 shows the structure of a PPH reactor with liquid seal in an embodiment of the present utility model. For convenience of explanation, the drawings show only structures related to the embodiments of the present utility model.

Referring to fig. 1, a PPH reactor 100 with liquid seal according to a preferred embodiment of the present utility model includes a reactor body 110, a sealing structure 120, a stirring paddle 130 and a stirring driver 140.

Referring to fig. 2, the reaction vessel 110 has a reaction chamber 111 therein. The top end of the reaction vessel body 110 is provided with a mounting hole 112 communicating with the reaction chamber 111. It is understood that the top end of the reaction vessel body 110 refers to the upper end of the reaction vessel body 110. Specifically, the mounting hole 112 is opened on the upper surface of the reaction vessel body 110. It can be understood that the reaction kettle main body 110 is further provided with a feed port 113 and a discharge port 114 which are communicated with the reaction chamber 111.

Referring to fig. 3 to 5, the sealing structure 120 includes a sealing base 121 and a sealing cap 122. The sealing base 121 is penetrated and sealed and fixed in the mounting hole 112. The sealing base 121 is provided with a through hole 1211 that allows communication between the outside and the reaction chamber 111. An end portion of the sealing base 121 facing away from the reaction chamber 111 is formed with an annular groove 1212 along the circumferential direction of the through hole 1211. That is, the annular groove 1212 is disposed around the central axis of the through hole 1211. The interior of the sealing cap 122 is hollow and has an open end 1221 and a closed end 1222. The open end 1221 is inserted into the annular groove 1212 to form a sealed pressure relief passage 123 with the inner wall of the annular groove 1212 capable of communicating the outside with the through hole 1211. The open end 1221 is suspended within the annular recess 1212. The annular groove 1212 is adapted to hold a sealing liquid 200 capable of flooding the end of the open end 1221, and the liquid-tight closed end 1222 of the sealing relief channel 123 is provided with a connecting hole 1223 communicating with the through hole 1211. The sealing liquid 200 may be water, oil or other mixed solution.

The stirring paddle 130 includes a stirring shaft 131 and a blade structure 132. One end of the stirring shaft 131 penetrates through the connecting hole 1223 and is fixedly connected with the closed end 1222 in a sealing manner, and the other end penetrates through the through hole 1211 and extends into the reaction cavity 111 to be fixedly connected with the blade structure 132. The stirring shaft 131 is clearance fitted to the through hole 1211. Thereby, a gap is provided between the stirring shaft 131 and the inner wall of the through hole 1211 to communicate the reaction chamber 111 with the seal pressure release passage 123. The stirring shaft 131 may be directly and fixedly connected with the sealing cap 122 in a sealing manner, or may be connected with the sealing cap 122 through an annular mounting structure such as a flange plate or an annular mounting plate. In the process of rotating the stirring shaft 131 at a high speed, the sealing cap 122 also rotates along with the stirring shaft 131, and the sealing cap and the stirring shaft are static sealing, so that the sealing effect is good.

The stirring driving member 140 is in transmission connection with the stirring shaft 131 and is used for driving the blade structure 132 to stir the materials in the reaction cavity 111. Specifically, the output shaft of the stirring driving member 140 is in transmission connection with one end of the stirring shaft 131 extending out of the reaction kettle main body 110, so as to drive the stirring shaft 131 to drive the paddle structure 132 to stir the materials in the reaction cavity 111. The stirring driving member 140 may be mounted on the reaction kettle main body 110, or may be mounted on the sealing base 121, or may be mounted on other devices or other positions through other supporting structures.

In practical applications, the sealing liquid 200 is stored in the annular groove 1212, and the open end 1221 of the sealing cap 122 extends below the liquid surface of the sealing liquid 200, so as to form a liquid seal in the sealing pressure release channel 123, and prevent external air from entering the reaction chamber 111 through the connection between the stirring shaft 131 and the reaction kettle main body 110.

When the stirring driving member 140 drives the stirring shaft 131 to drive the paddle structure 132 to rotate so as to stir the materials in the reaction cavity 111, the stirring shaft 131 can drive the sealing cap 122 to rotate in the annular groove 1212, and at this time, the sealing liquid 200 in the annular groove 1212 still has a good sealing effect, and the sealing effect is not poor or the sealing structure 120 is damaged due to the high-speed rotation of the stirring shaft 131, so that the sealing reliability is high.

In addition, when the stirring driving member 140 drives the stirring shaft 131 to drive the paddle structure 132 to stir the material in the reaction chamber 111, the condition that the pressure in the reaction chamber 111 is too high is likely to occur, and at this time, the gas with the relatively high pressure in the reaction chamber 111 enters the sealed pressure release channel 123 through the through hole 1211 and passes through the sealed liquid 200 in the form of bubbles to be discharged to the outside (the gas discharge direction is consistent with the arrow direction in fig. 3), so that the purpose of automatic pressure release is achieved, the function of eliminating potential safety hazards is achieved, the pressure in the reaction chamber 111 is ensured not to influence the stirring work, and the uniform stirring of the material is ensured.

Therefore, the above-mentioned sealing structure 120 is provided to realize liquid sealing between the stirring shaft 131 and the reaction kettle main body 110, so that the PPH reaction kettle 100 with liquid sealing has higher sealing effect, higher sealing reliability and higher safety performance.

Referring again to fig. 4 and 5, in some embodiments, the seal base 121 includes an outer cylinder 1213, an inner cylinder 1214, and an annular connecting floor 1215. Both the outer tube 1213 and the inner tube 1214 have a tubular structure with both ends open. The outer tube 1213 is inserted through and sealed in the mounting hole 112. The inner cylinder 1214 is disposed through the outer cylinder 1213, and the outer wall of the inner cylinder 1214 is in clearance fit with the inner wall of the outer cylinder 1213. The bottom plate is sealingly secured between the outer cylinder 1213 and the inner cylinder 1214. An annular groove 1212 is defined between the inner wall of the outer cylinder 1213 and the outer wall of the inner cylinder 1214 on the side surface of the bottom plate facing away from the reaction chamber 111. The inner wall of the inner tube 1214 is surrounded by a through hole 1211. The outer tube 1213 and the inner tube 1214 may be circular tubes, or may be rectangular, elliptical, or other shaped tubes.

The connection base plate 1215 may be connected between the inner wall of the outer tube 1213 and the outer wall of the inner tube 1214 to form the sealing structure 120, or one end of the outer tube 1213 and one end of the inner tube 1214 may be fixedly connected to the upper surface of the connection base plate 1215. In the present utility model, the position of the connection base 1215 on the outer tube 1213 and the inner tube 1214 in the height direction of the outer tube 1213 is not limited as long as it is ensured that the annular groove 1212 is defined between the inner wall of the outer tube 1213, the surface of the connection base 1215 on the side facing away from the blade of the stirring paddle 130, and the outer wall of the inner tube 1214. And the sealing base 121 is divided into an outer cylinder 1213, an inner cylinder 1214 and a connecting bottom plate 1215 which are formed separately, so that the processing difficulty of the sealing base 121 can be reduced, the material waste can be reduced, and the processing cost can be reduced.

Further, in some embodiments, one end of the outer tube 1213 and one end of the inner tube 1214 extend into the reaction chamber 111. The connection base 1215 is located at an end of the outer barrel 1213 adjacent to the blade structure 132. This allows the depth of the annular groove 1212 to be increased as much as possible without increasing the height of the outer barrel 1213 and the inner barrel 1214, thereby allowing the annular groove 1212 to accommodate more sealing liquid 200 to further improve sealing reliability.

Further, in some embodiments, the outer barrel 1213 is positioned at a lower elevation away from the end of the reaction chamber 111 than the inner barrel 1214 is positioned at the end of the reaction chamber 111. The end of the outer cylinder 1213 facing away from the end of the reaction chamber 111 is the upper end face of the outer cylinder 1213 located outside the reaction kettle main body 110, and similarly, the end of the inner cylinder 1214 at the end of the reaction chamber 111 is the upper end face of the inner cylinder 1214 located outside the reaction kettle main body 110. In the working process of the stirring paddle 130, the pressure in the reaction cavity 111 changes along with the working time and the running condition, meanwhile, the liquid level of the sealing liquid 200 positioned on the outer wall side of the sealing cap 122 and the liquid level of the sealing liquid 200 positioned on the inner wall side of the sealing cap 122 also rise and fall, and the position height of the upper end of the inner cylinder 1214 is set to be higher than the position height of the upper end of the outer cylinder 1213, so that the probability that the sealing liquid enters the reaction cavity 111 from the upper end of the inner cylinder 1214 in the stirring working process is reduced, and the safety and reliability of the PPH reaction cavity 111 with liquid sealing are improved.

In some embodiments, the seal cap 122 includes a top plate 1224 and a side plate 1225 disposed along a circumferential direction of the top plate 1224 and connected to the top plate 1224. Top plate 1224 encloses sealing cap 122 with side plate 1225 to form an interior hollow. The top plate 1224 is provided with a connecting hole 1223. The side plate 1225 has an open end 1221 at an end facing away from the top plate 1224, and a closed end 1222 at an end of the side plate 1225 connected to the top plate 1224. The end of the side plate 1225 facing away from the top plate 1224 is inserted into the annular groove 1212 and suspended in the annular groove 1212. The shape of the top plate 1224 may be the same as or different from the cross-sectional shape of the inner cylinder 1214, so long as the end of the side plate 1225 facing away from the top plate 1224 can be inserted into the annular groove 1212, and a sealing pressure release channel 123 can be formed between the end and the inner wall of the annular groove 1212. In particular, in this embodiment, the top plate 1224 has a shape that conforms to the cross-sectional outer contour of the inner barrel 1214. The sealing cap 122 is arranged to be the top plate 1224 and the side plate 1225, so that the processing difficulty can be reduced, the waste of cutting is avoided, the processing cost is reduced, and the product is light.

Specifically, the stirring shaft 131 penetrates through the connecting hole 1223 and is fixedly connected with the top plate 1224 in a sealing manner, so as to realize connection between the stirring shaft 131 and the sealing cap 122.

In some embodiments, the liquid-tight PPH reactor 100 also includes an annular mounting plate 150. The annular mounting plate 150 is sleeved on the stirring shaft 131 and is fixedly connected with the stirring shaft 131. The annular mounting plate 150 is removably coupled to the closed end 1222 such that a side surface of the annular mounting plate 150 facing the seal base 121 and a side surface of the closed end 1222 facing away from the seal base 121 are in abutment with each other. The annular mounting plate 150 may be a circular annular structure arranged along the circumferential direction of the stirring shaft 131, or may be a plate with an opening in the middle; in terms of machining and forming, the annular mounting plate 150 may be a separately formed part, and may be fixedly connected to the stirring shaft 131 by welding, interference fit, or may be an integrally formed structure with the stirring shaft 131 by machining, pouring, or the like. Thus, by means of mutual attachment, the effective contact area between the annular mounting plate and the closed end 1222 can be increased to ensure the sealing effect between the two. And the provision of the annular mounting plate 150 facilitates the sealing and connection between the stirring shaft 131 and the sealing cap 122.

When the seal cap 122 includes a top plate 1224 and a side plate 1225, the annular mounting plate 150 is detachably connected to the top plate 1224, and a side surface of the top plate 1224 facing away from the side plate 1225 is attached to the annular mounting plate 150.

In this embodiment, the annular mounting plate 150 is a flange plate that is disposed along the circumferential direction of the stirring shaft 131 and integrally connected to the stirring shaft 131. The side of the flange facing the seal base 121 is removably connected to the end of the closed end 1222 facing away from the seal base 121. More specifically, the flange is removably secured to the closed end 1222 by a threaded fastener.

In some embodiments, the liquid-tight PPH reactor 100 also includes a mounting bracket 160 mounted on the seal base 121. The stirring driver 140 is mounted on the mounting bracket 160, and the open end 1221 is suspended in the annular groove 1212. Thereby, the open end 1221 of the sealing cap 122 is in a non-contact state with the inner wall of the annular groove 1212. The mounting bracket 160 is a supporting structure formed by rods and/or plates, and has supporting and connecting functions, so that the stirring driver 140, the stirring paddle 130 and the sealing cap 122 are convenient to mount.

Further, in some embodiments, the outer wall of the seal base 121 is provided with a mounting portion 1216 in the circumferential direction. The mounting portion 1216 is located outside the reaction tank main body 110 and is detachably connected with the mounting bracket 160. Specifically, when the sealing base 121 includes the outer tube 1213, the inner tube 1214, and the connection base plate 1215, an outer wall of one end of the outer tube 1213 remote from the reaction chamber 111 is provided with a mounting portion 1216 in the circumferential direction. It should be noted that, the mounting bracket 160 cannot form a shielding for the outlet of the seal pressure release channel 123, so as to ensure that the pressure in the reaction chamber 111 can be released through the seal pressure release channel 123. The mounting portion 1216 may be fixedly connected to the outer tube 1213 by welding or the like, or may be integrally formed with the outer tube 1213 by machining, casting or the like. And the setting of the mounting part 1216 makes the assembly work of the mounting bracket 160 simpler, and reduces the assembly difficulty of the PPH reaction kettle with liquid.

Referring again to FIG. 1, in some embodiments, a baffle 170 is disposed vertically on the inner wall of the reaction chamber 111. The number of spoilers 170 may be one or more. When the number of spoilers 170 is plural, the plurality of spoilers 170 are disposed at intervals along the circumferential direction of the mounting hole 112. The baffle 170 can reduce the vortex generated by the material when the stirring paddle 130 stirs the material in the reaction chamber 111, and strengthen the stirring effect of the stirring paddle 130 on the material.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the utility model, which are described in detail and are not to be construed as limiting the scope of the utility model. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the utility model, which are all within the scope of the utility model. Accordingly, the scope of protection of the present utility model is to be determined by the appended claims.

Claims (10)

1. The PPH reaction kettle with the liquid seal is characterized by comprising a reaction kettle main body, a seal structure, stirring paddles and a stirring driving piece;

the reaction kettle body is internally provided with a reaction cavity; the top end of the reaction kettle main body is provided with a mounting hole communicated with the reaction cavity;

the sealing structure comprises a sealing base and a sealing cap which is hollow in the interior and is provided with an open end and a closed end; the sealing base is penetrated and fixed in the mounting hole in a sealing way; the sealing base is provided with a through hole capable of communicating the outside with the reaction cavity; an annular groove is formed in the end part of one end of the sealing base, which is away from the reaction cavity, along the circumferential direction of the through hole; the opening end is inserted into the annular groove so as to form a sealed pressure relief channel which can be communicated with the outside and the through hole with the inner wall of the annular groove; the annular groove is used for containing sealing liquid which can submerge the end part of the opening end so as to seal the sealing pressure release channel with the liquid; the closed end is provided with a connecting hole communicated with the through hole;

the stirring paddle comprises a stirring shaft and a paddle structure; one end of the stirring shaft penetrates through the connecting hole and is fixedly connected with the closed end in a sealing way, and the other end of the stirring shaft penetrates through the through hole and stretches into the reaction cavity to be fixedly connected with the blade structure; the stirring shaft is in clearance fit with the through hole;

the stirring driving piece is in transmission connection with the stirring shaft and is used for driving the blade structure to stir materials in the reaction cavity.

2. The PPH reactor with the liquid seal according to claim 1, wherein the seal base comprises an outer cylinder, an inner cylinder and a connecting bottom plate with a ring shape; the outer cylinder and the inner cylinder are both cylindrical structures with two open ends; the outer cylinder penetrates through and is fixed in the mounting hole in a sealing manner; the inner cylinder penetrates through the outer cylinder, and the outer wall of the inner cylinder is in clearance fit with the inner wall of the outer cylinder; the bottom plate is fixed between the outer cylinder and the inner cylinder in a sealing way; the annular groove is formed by surrounding the inner wall of the outer cylinder, the surface of one side of the bottom plate, which is away from the reaction cavity, and the outer wall of the inner cylinder; the inner wall of the inner cylinder is surrounded to form the through hole.

3. The PPH reactor with liquid seal according to claim 2, wherein one end of said outer and inner barrels extend into said reaction chamber; the connecting bottom plate is arranged at one end of the outer barrel, which is close to the blade structure.

4. The PPH reactor with liquid seal according to claim 2, wherein said stirring shaft is axially oriented; the height of the outer cylinder at one end outside the reaction kettle body is lower than that of the inner cylinder at one end inside the sealing cap.

5. The PPH reactor with liquid seal according to claim 1, wherein said sealing cap comprises a top plate and a side plate disposed along a circumferential direction of said top plate and connected to said top plate; the top plate and the side plates are surrounded to form the sealing cap with a hollow inside; the top plate is provided with a connecting hole; one end of the side plate connected with the top plate is the closed end; one end of the side plate, which is away from the top plate, is an open end.

6. The PPH reactor with liquid seal according to claim 1, further comprising an annular mounting plate; the annular mounting plate is sleeved on the stirring shaft and fixedly connected with the stirring shaft; the annular mounting plate is detachably connected with the closed end, and one side surface of the annular mounting plate, which faces the sealing base, and one side surface of the closed end, which faces away from the sealing base, are mutually attached.

7. The PPH reactor with liquid seal according to claim 6, wherein said annular mounting plate is a flange plate disposed along a circumferential direction of said stirring shaft and integrally connected to said stirring shaft; one side of the flange plate, which faces the sealing base, is detachably connected with one end of the closed end, which faces away from the sealing base.

8. The PPH reactor with liquid seal according to claim 1, further comprising a mounting bracket mounted on said seal base; the stirring driving piece is arranged on the mounting bracket, and the opening end is suspended in the annular groove.

9. The PPH reactor with liquid seal according to claim 8, wherein an outer wall of said seal base is provided with a mounting portion in a circumferential direction; the mounting bracket is detachably mounted on the mounting portion.

10. The PPH reactor with liquid seal according to claim 1, wherein said inner wall of said reaction chamber is vertically provided with a baffle plate.

Images