Pulping apparatus

Abstract

The application provides a pulping device, which comprises a circulating tank, a top cover, a dispersion structure and a heat dissipation structure. The circulating tank is internally provided with a containing cavity for containing slurry. The top cover is arranged at the top of the circulating tank. The dispersion structure is arranged in the containing cavity and at the bottom of the circulating tank, and is used for dispersing the slurry and making the slurry flow in the circulating tank. The heat dissipation structure is connected to the top cover, is at least partially arranged inside the containing cavity, and is used for dissipating heat of the slurry. In this way, the pulping device dissipates heat of the slurry close to the center of the circulating tank through the heat dissipation structure, and dissipates heat of the slurry close to the inner wall of the circulating tank through the tank body of the circulating tank, thereby greatly improving the heat dissipation efficiency of the slurry, and effectively improving the temperature consistency of the slurry through the heat dissipation structure and the circulating tank, thereby improving the quality of the slurry.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of pulping, and in particular to a pulping device. BACKGROUND

[0002] When the pulping device stirs the pulp, the temperature of the pulp will rise, which is not conducive to the quality of the pulp. The traditional pulping device relies on the outer wall of the circulating tank for heat dissipation. The pulp near the center of the circulating tank cannot be effectively and timely cooled, resulting in low and uneven heat dissipation efficiency of the pulp. SUMMARY

[0003] The present application provides a pulping device to solve the problems of low and uneven heat dissipation efficiency of the pulp.

[0004] The present application provides a pulping device, which comprises a circulating tank, a top cover, a dispersion structure and a heat dissipation structure. The circulating tank is provided with a containing cavity for containing pulp. The top cover is arranged at the top of the circulating tank. The dispersion structure is located in the containing cavity and is arranged at the bottom of the circulating tank. The dispersion structure is used for dispersing the pulp and making the pulp circulate in the circulating tank. The heat dissipation structure is connected to the top cover, and the heat dissipation structure is at least partially located inside the containing cavity and is used for dissipating heat of the pulp.

[0005] In some embodiments, the ratio of the first distance between the heat dissipation structure and the side wall of the circulating tank to the second distance between the heat dissipation structure and the central axis of the circulating tank is 0.2-0.8.

[0006] In some embodiments, the heat dissipation structure is provided in multiple, and the multiple heat dissipation structures are arranged in a circumferential direction of the circulating tank.

[0007] In some embodiments, the heat dissipation structure is provided with a heat conduction channel, and the heat conduction channel is provided with a heat conduction medium, and the heat conduction medium circulates in the heat conduction channel.

[0008] In some embodiments, the heat dissipation structure is configured as a heat pipe, the heat pipe is provided with the heat conduction channel, the heat conduction channel is configured as a capillary channel, and the heat pipe comprises a first segment and a second segment connected to the first segment, the first segment is located in the containing cavity, and the second segment is located outside the circulating tank.

[0009] In some embodiments, the heat dissipation structure further comprises a fin arranged on the first segment and / or the second segment.

[0010] In some embodiments, the heat dissipation structure further comprises a temperature control member, and the temperature control member is arranged outside the circulating tank and is used for controlling the temperature of the second segment.

[0011] In some embodiments, the heat dissipation structure comprises a first pipe portion and a second pipe portion, the heat conduction channel comprises a first flow channel and a second flow channel, the first pipe portion is internally provided with the first flow channel, the first pipe portion is arranged in the second pipe portion, the second flow channel is formed between the outer wall of the first pipe portion and the inner wall of the second pipe portion, and the end of the first pipe portion and the end of the second pipe portion are communicated; or, the first pipe portion is arranged outside the second pipe portion, the first pipe portion is internally provided with the first flow channel, the second pipe portion is internally provided with the second flow channel, and the end of the first pipe portion and the end of the second pipe portion are communicated.

[0012] In some embodiments, the heat dissipation structure further comprises a pumping member, which is used to extract the heat conduction medium from the second flow channel and pump the heat conduction medium into the first flow channel.

[0013] In some embodiments, the heat dissipation structure comprises a first heat dissipation member and a second heat dissipation member, the first heat dissipation member is connected to the top cover and extends in a first direction in the accommodation cavity, the second heat dissipation member is connected to the first heat dissipation member and extends in a second direction in the accommodation cavity, the first direction intersects the second direction, and the second heat dissipation member is arranged in plurality, and the plurality of second heat dissipation members are arranged in a spaced manner along the first direction.

[0014] In some embodiments, the first heat dissipation member is provided with a heat conduction channel, the second heat dissipation member is provided with a branch channel, the branch channel is communicated with the heat conduction channel, and the heat conduction channel and the branch channel are provided with a heat conduction medium.

[0015] In some embodiments, the distance between two adjacent second heat dissipation members decreases or is equal from the top cover to the bottom of the circulating tank, and / or the length of the second heat dissipation member close to the bottom of the circulating tank is greater than or equal to the length of the second heat dissipation member close to the top cover.

[0016] In some embodiments, the pulping device further comprises a stirring paddle for stirring the slurry, the stirring paddle comprises a rotating shaft and a plurality of stirring blades arranged on the rotating shaft, the rotating shaft extends in the axial direction of the circulating tank in the accommodation cavity, the stirring blades are arranged in the accommodation cavity, the extension direction of the stirring blades intersects the extension direction of the rotating shaft, and the plurality of stirring blades are arranged in a spaced manner along the axial direction of the circulating tank.

[0017] In some embodiments, the distance between the end of the second heat dissipation member away from the first heat dissipation member and the rotating shaft is greater than the distance between the second heat dissipation member and the adjacent stirring blade.

[0018] In some embodiments, the dispersion structure comprises a stator and a rotor, the stator comprises a stator disc and at least one layer of stator blocking ring, the stator blocking ring is arranged on the stator disc, the stator blocking ring is provided with a stator groove, the rotor comprises a rotor disc and at least one layer of rotor blocking ring, the rotor blocking ring is arranged on the rotor disc, the rotor blocking ring is provided with a rotor groove, the rotor blocking ring is located inside and / or outside the stator blocking ring, the stator disc is provided with a flow inlet, the stator groove on the outermost stator blocking ring or the rotor groove on the outermost rotor blocking ring is configured as a flow outlet, the slurry flows into the flow inlet and flows out of the flow outlet.

[0019] The pulp preparation device provided by the application has the following advantages. On the one hand, the pulp preparation device can cool the slurry close to the center of the circulating tank through the heat dissipation structure, and can cool the slurry close to the inner wall of the circulating tank through the tank body of the circulating tank, thereby greatly improving the heat dissipation efficiency of the slurry, and effectively improving the temperature consistency of the slurry by cooling the slurry through the heat dissipation structure and the circulating tank, thereby improving the quality of the slurry. On the other hand, the dispersion structure is arranged in the containing cavity, the slurry is dispersed and circulated in the circulating tank through the dispersion structure, the structure of the pulp preparation device can be simplified, the structure of the pulp preparation device is more compact, and no additional pipeline needs to be arranged, thereby greatly reducing the difficulty of cleaning the pulp preparation device. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the application, the drawings needed in the embodiments will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the application, and other drawings can be obtained by those skilled in the art without creative labor.

[0021] Figure 1 is a cross-sectional view of the pulp preparation device provided by the embodiments of the application.

[0022] Figure 2 is a cross-sectional view of the dispersion structure provided by the embodiments of the application.

[0023] Figure 3 is a structural schematic view of the stator and the rotor provided by the embodiments of the application.

[0024] Figure 4 is a cross-sectional view of the heat dissipation structure provided by the embodiments of the application.

[0025] Figure 5 is a side view of the heat dissipation structure provided by the embodiments of the application.

[0026] Figure 6This is a partial structural diagram of the heat dissipation structure provided in some embodiments of this application.

[0027] Figure 7 This is a side view of the heat dissipation structure provided in some embodiments of this application.

[0028] Figure 8 This is a cross-sectional view of the heat dissipation structure provided in some embodiments of this application.

[0029] Figure 9 This is a cross-sectional view of a heat dissipation structure provided in some other embodiments of this application.

[0030] Figure 10 This is a partial cross-sectional view of the agitator provided in some embodiments of this application.

[0031] Main reference numerals: Pulping equipment 100; Circulating tank 10; Receiving cavity 101; Top 102; Bottom 103; Top cover 11; Side wall 12; Bottom wall 13; Discharge port 131; Central shaft C1; Dispersion structure 20; Inlet 201; Outlet 202; Stator 21; Stator disc 211; Stator retaining ring 212; Stator slot 2121; Rotor 22; Rotor disc 221; Rotor retaining ring 222; Rotor slot 2221; Pusher blade 223; Mounting base 224; First base 2241; Second base 2242; Connector 2243; Connecting hole 2244; Drive shaft 23; Driver 24; Drainage hood 25; Heat dissipation structure 30; First section 3 11; Second section 312; Third section 313; Fin 314; Temperature control element 315; Protective sleeve 316; First tube 321; First flow channel 3211; Second tube 322; Second flow channel 3221; First heat dissipation element 331; Heat conduction channel 3311; Second heat dissipation element 332; Inclined surface 3322; Flow guiding structure 3324; Stirring paddle 40; Rotating shaft 41; Flow guiding groove 411; Flow guiding sleeve 412; Cooling flow channel 413; Stirring paddle blade 42; Wall scraping paddle blade 43; First paddle section 4311; First paddle segment 4311; Second paddle segment 4312; Second paddle section 432; Scraping element 44; Heat dissipation jacket 50; First distance D1; Second distance D2.

[0032] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this application. Detailed Implementation

[0033] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0034] Reference to“an embodiment” or“the embodiment” means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment. The appearances of the phrase“in one embodiment” or“in the embodiment” in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily all referring to a single, alternative embodiment. As used herein, the term“exemplary” or“illustrative” means serving as an example, instance or illustration, and not necessarily as preferable or advantageous over other embodiments. As used herein, the term“or” means any one of the items, but can also mean any combination of those items, in the absence of clear language to the contrary.

[0035] It should be noted that the terms“first”,“second”, and the like used in the description and the claims of the present application as well as above-described accompanying drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. The term“and / or” used in the present application refers to any combination of one or more of the associated listed items and all possible combinations thereof, and includes these combinations.

[0036] Please refer to Figure 1 , Figure 1 is a cross-sectional view of a pulping apparatus 100 provided by an embodiment of the present application. The pulping apparatus 100 includes a circulating tank 10, a top cover 11, a dispersion structure 20, and a heat dissipation structure 30. The circulating tank 10 is provided with a containing cavity 101 for containing slurry. The circulating tank 10 includes a top portion 102 and a bottom portion 103 arranged opposite along a central axis C1. After the pulping apparatus 100 is installed, the top portion 102 of the circulating tank 10 is located on the side of the bottom portion 103 away from the ground. The top cover 11 is arranged on the top portion 102 of the circulating tank 10. The dispersion structure 20 is located in the containing cavity 101 and arranged on the bottom portion 103 of the circulating tank 10. The dispersion structure 20 is used to disperse the slurry and make the slurry flow in the circulating tank 10. The heat dissipation structure 30 is connected to the top cover 11. The heat dissipation structure 30 is at least partially located inside the containing cavity 101 and is used to dissipate heat of the slurry in the containing cavity 101. The heat dissipation structure 30 can be fixedly connected to the top cover 11. In some embodiments, the heat dissipation structure 30 and the top cover 11 can be detachably connected to facilitate maintenance of the heat dissipation structure 30. In some embodiments, the heat dissipation structure 30 and the top cover 11 can also be non-detachably connected. For example, the heat dissipation structure 30 and the top cover 11 can be welded.

[0037] The dispersion structure 20 generates heat when dispersing and circulating the slurry due to the friction between the slurry and the dispersion structure 20, the friction between the slurry and the circulating tank 10, and the internal friction of the slurry flowing, which increases the temperature of the slurry and negatively affects the quality of the slurry. In the pulping device 100 of the present application, on the one hand, the pulping device 100 dissipates heat from the slurry close to the center of the circulating tank 10 through the heat dissipation structure 30, and dissipates heat from the slurry close to the inner wall of the circulating tank 10 through the tank body of the circulating tank 10, thereby greatly improving the heat dissipation efficiency of the slurry, and effectively improving the temperature consistency of the slurry through the common heat dissipation of the heat dissipation structure 30 and the circulating tank 10, thereby improving the quality of the slurry; on the other hand, compared with the traditional pulping device in which the dispersion structure is arranged outside the circulating tank and connected with the circulating tank through a pipeline, the pulping device 100 in the present application is based on arranging the dispersion structure 20 in the containing cavity 101, and dispersing and circulating the slurry inside the circulating tank 10 through the dispersion structure 20, which can simplify the structure of the pulping device 100, make the structure of the pulping device 100 more compact, and without the need to arrange an additional pipeline, greatly reducing the difficulty of cleaning the pulping device 100.

[0038] The circulating tank 10 includes a side wall 12 and a bottom wall 13. The side wall 12 is fixedly connected to the bottom wall 13. The side wall 12 and the bottom wall 13 form a containing cavity 101. The dispersion structure 20 is used to suck the slurry along the axial direction of the circulating tank 10, and make the slurry discharge along the radial direction of the circulating tank 10. The slurry flows along the bottom wall 13 from the center axis C1 of the circulating tank 10 to the side wall 12, rises along the side wall 12 from the bottom 103 to the top 102, and sinks from the top 102 to the bottom 103 near the center axis C1 of the circulating tank 10, thereby forming a circulating flow in the circulating tank 10. Exemplarily, the side wall 12 and the bottom wall 13 are connected by a circular arc, and the side wall 12 and the bottom wall 13 are smoothly connected, thereby facilitating the reduction of the flow rate loss of the slurry at the connection between the bottom wall 13 and the side wall 12, and improving the circulation speed of the slurry in the circulating tank 10. In some embodiments, the bottom wall 13 can be curved towards the top 102 to guide the slurry and reduce the flow rate loss of the slurry. In some embodiments, the bottom wall 13 is provided with a discharge port 131 which communicates with the containing cavity 101. The discharge port 131 is arranged close to the dispersion structure 20 to improve the discharge speed of the slurry from the discharge port 131 and improve the discharge efficiency. The axial direction of the circulating tank 10 is parallel to the center axis C1, the radial direction of the circulating tank 10 is perpendicular to the center axis C1, and the circumferential direction of the circulating tank 10 is perpendicular to the center axis C1 and surrounds the center axis C1.

[0039] Please refer to Figure 1 , Figure 2 and Figure 3The dispersion structure 20 comprises a stator 21 and a rotor 22. The stator 21 comprises a stator disc 211 and at least one layer of stator blocking rings 212. The stator blocking rings 212 are arranged on the stator disc 211. The stator blocking rings 212 are provided with stator grooves 2121. The rotor 22 comprises a rotor disc 221 and at least one layer of rotor blocking rings 222. The rotor blocking rings 222 are arranged on the rotor disc 221. The rotor blocking rings 222 are provided with rotor grooves 2221. The rotor blocking rings 222 are located on the inner side and / or the outer side of the stator blocking rings 212. The stator disc 211 is provided with a flow inlet 201. The stator grooves 2121 on the outermost layer of stator blocking rings 212 or the rotor grooves 2221 on the outermost layer of rotor blocking rings 222 are configured as a flow outlet 202. At least one of the stator blocking rings 212 and the rotor blocking rings 222 is arranged in multiple layers. For example, the rotor blocking rings 222 are arranged in one layer, the stator blocking rings 212 are arranged in two layers, and the rotor blocking rings 222 are located between the two layers of stator blocking rings 212. The stator grooves 2121 on the outermost layer of stator blocking rings 212 are configured as the flow outlet 202. The slurry flows into the dispersion structure 20 from the flow inlet 201 and flows out from the flow outlet 202. The stator 21 is fixed relative to the circulating tank 10, and the rotor 22 is rotatable relative to the circulating tank 10. When the rotor 22 rotates, a negative pressure is generated near the rotor blocking rings 222, so that the slurry flows into the dispersion structure 20 from the flow inlet 201, and the slurry is thrown out of the flow outlet 202 by the centrifugal action of the rotor blocking rings 222 on the slurry. When the slurry flows through the rotor grooves 2221 on the rotor blocking rings 222 and the stator grooves 2121 on the stator blocking rings 212, the rotor blocking rings 222 and the stator blocking rings 212 shear and disperse the slurry.

[0040] The rotor 22 further comprises a pushing blade 223 fixedly connected with the rotor disc 221. The pushing blade 223 and the rotor disc 221 can be fixedly connected together by welding, screwing, clamping, or the like, or the pushing blade 223 can be integrally formed with the rotor disc 221. The pushing blade 223 extends in a spiral shape. In the axial direction of the circulating tank 10, the pushing blade 223 is generally conical. The pushing blade 223 can be a clockwise spiral or a counterclockwise spiral. When the rotor 22 rotates, the pushing blade 223 is used to push the slurry to flow in the axial direction and the radial direction of the circulating tank 10, so that the slurry flows into the dispersion structure 20 from the flow inlet 201.

[0041] The dispersion structure 20 further comprises a mounting seat 224. The mounting seat 224 comprises a first seat body 2241, a second seat body 2242, and a connecting piece 2243. The first seat body 2241 is fixedly connected with the circulating tank 10. The second seat body 2242 is located on the side of the first seat body 2241 away from the bottom wall 13 of the circulating tank 10. The connecting piece 2243 is located between the first seat body 2241 and the second seat body 2242 and abuts against the first seat body 2241 and the second seat body 2242, respectively. The first seat body 2241, the second seat body 2242, and the connecting piece 2243 are fixedly connected together. For example, the first seat body 2241, the second seat body 2242, and the connecting piece 2243 can be fixedly connected together by screws or bolts. Exemplarily, the second seat body 2242 is provided with a screw through hole, the connecting piece 2243 is hollow, and the first seat body 2241 is provided with a threaded hole, the screw is arranged in the threaded through hole and the connecting piece 2243 and is threadedly connected with the threaded hole. In some embodiments, the first seat body 2241, the second seat body 2242, and the connecting piece 2243 can be fixedly connected together by welding, clamping, or one-piece forming.

[0042] The stator 21 and the rotor 22 are both located between the first seat body 2241 and the second seat body 2242. The stator 21 is fixedly connected with the first seat body 2241 and / or the second seat body 2242. Exemplarily, the stator 21 is fixedly connected with the second seat body 2242. The stator 21 and the second seat body 2242 can be fixedly connected together by welding, clamping, screwing, or one-piece forming.

[0043] The second seat body 2242 is provided with a communication hole 2244. The communication hole 2244 is in communication with the flow inlet 201. The pushing blade 223 is arranged in the communication hole 2244 and extends between the first seat body 2241 and the second seat body 2242. The part of the pushing blade 223 located in the communication hole 2244 and away from the first seat body 2241 of the second seat body 2242 is used to push the slurry to flow in the axial direction of the circulating tank 10, so that the dispersion structure 20 sucks the slurry from the communication hole 2244 and the flow inlet 201. The part of the pushing blade 223 located between the first seat body 2241 and the second seat body 2242 is used to push the slurry to flow in the radial direction of the circulating tank 10, so that the slurry passes through the rotor slot 2221 and the stator slot 2121. The pushing blade 223 is used to increase the flow speed of the slurry, thereby increasing the flow of the slurry in the dispersion structure 20 and improving the dispersion and circulation efficiency.

[0044] The dispersion structure 20 further comprises a driving shaft 23 and a driver 24. The driver 24 is in driving connection with the driving shaft 23. The driving shaft 23 is fixedly connected with the rotor 22. The driver 24 is used to drive the driving shaft 23 to rotate, so that the driving shaft 23 drives the rotor 22 to rotate relative to the stator 21. The first seat body 2241 is provided with a mounting hole, and the driving shaft 23 penetrates through the mounting hole. The driver 24 is arranged outside the circulating tank 10.

[0045] In some embodiments, the dispersion structure 20 further comprises a flow guide cover 25. The flow guide cover 25 is arranged at the communication hole 2244 and the flow inlet 201. The flow guide cover 25 is fixedly connected to the side of the second seat body 2242 away from the first seat body 2241. The flow guide cover 25 and the second seat body 2242 can be fixedly connected together by welding, clamping, screwing or the like, or the flow guide cover 25 and the second seat body 2242 can also be integrally formed. The flow guide cover 25 is arranged in a ring shape. The pushing blade 223 penetrates through the flow guide cover 25. The flow guide cover 25 is used to limit and guide the slurry. When the pushing blade 223 pushes the slurry to move, the flow guide cover 25 can reduce the loss of the slurry along the radial direction under the centrifugal action, so that the slurry is kept between the flow guide cover 25 and the pushing blade 223, thereby improving the axial pushing action of the pushing blade 223 on the slurry and improving the suction flow of the dispersion structure 20.

[0046] The ratio of the first distance D1 between the heat dissipation structure 30 and the side wall 12 of the circulating tank 10 to the second distance D2 between the heat dissipation structure 30 and the central axis C1 of the circulating tank 10 is 0.2-0.8. When the dispersion structure 20 drives the slurry to circulate, the flow speed of the slurry close to the side wall 12 of the circulating tank 10 is greater than that close to the central axis C1 of the circulating tank 10. The heat dissipation structure 30 is arranged close to the side wall 12 of the circulating tank 10, so that the flow speed of the slurry at the surface of the heat dissipation structure 30 is higher, thereby improving the heat exchange efficiency between the heat dissipation structure 30 and the slurry and improving the heat dissipation efficiency. The specific values of the first distance D1 and the second distance D2 can be specifically set according to actual needs, which are not limited in the present application. For example, the ratio of the first distance D1 to the second distance D2 can be 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, 0.8, etc.

[0047] The heat dissipation structure 30 is arranged apart from the side wall 12 of the circulating tank 10, so as to avoid the slurry from being blocked between the heat dissipation structure 30 and the side wall 12. The distance between the heat dissipation structure 30 and the side wall 12 can be specifically set according to actual needs, which is not limited in the present application.

[0048] The heat dissipation structure 30 can be provided in plurality, and the plurality of heat dissipation structures 30 are arranged at intervals along the circumferential direction of the circulating tank 10, so as to increase the contact area of the heat dissipation structure 30 with the slurry and improve the heat dissipation efficiency. The plurality of heat dissipation structures 30 can be arranged at equal intervals or at unequal intervals along the circumferential direction of the circulating tank 10. In some embodiments, the heat dissipation structure 30 can also be provided in one.

[0049] Please refer to Figure 1 and Figure 4 , the heat dissipation structure 30 is provided with a heat conduction channel 3311. A heat conduction medium is arranged in the heat conduction channel 3311, and the heat conduction medium circulates in the heat conduction channel 3311. Part of the heat dissipation structure 30 is located inside the circulating tank 10, and the other part is located outside the circulating tank 10. When the heat conduction medium circulates in the heat conduction channel 3311, it can carry the heat inside the circulating tank 10 to the outside of the circulating tank 10.

[0050] The heat dissipation structure 30 comprises a first heat dissipation member 331. The first heat dissipation member 331 is connected to the top cover 11 and extends in the first direction F1 in the accommodating cavity 101. Exemplarily, the first direction F1 can be parallel to the axial direction of the circulating tank 10. In some embodiments, the first direction F1 can be arranged at an angle with the axial direction of the circulating tank 10. In some embodiments, the first heat dissipation member 331 can also be arranged in a curved manner. For example, the first heat dissipation member 331 can be arranged in a spiral shape along the axial and circumferential directions of the circulating tank 10. In some embodiments, the first heat dissipation member 331 can also be arranged in a meandering manner to increase the contact area of the first heat dissipation member 331 with the slurry. The distance between the heat dissipation structure 30 and the side wall 12 of the circulating tank 10 can refer to the distance between the first heat dissipation member 331 and the side wall 12 of the circulating tank 10. The distance between the heat dissipation structure 30 and the central axis C1 of the circulating tank 10 can refer to the distance between the first heat dissipation member 331 and the central axis C1 of the circulating tank 10.

[0051] The first heat dissipation member 331 is provided with a heat conduction channel 3311. The heat conduction channel 3311 extends along the extension direction of the first heat dissipation member 331. The first heat dissipation member 331 is configured as a tubular structure. The cross section of the first heat dissipation member 331 can be circular, elliptical, polygonal, etc. One end of the first heat dissipation member 331 extends into the circulating tank 10 and protrudes into the slurry, and the other end of the first heat dissipation member 331 extends to the outside of the circulating tank 10.

[0052] In some embodiments, the heat dissipation structure 30 further comprises a second heat dissipation member 332. The second heat dissipation member 332 is connected to the first heat dissipation member 331 and extends in the second direction F2 within the accommodating cavity 101. The first direction F1 and the second direction F2 are arranged to intersect. For example, the first direction F1 and the second direction F2 can be arranged to be perpendicular. The second direction F2 can be parallel to the radial direction of the circulating tank 10. In some embodiments, the first direction F1 and the second direction F2 can also be arranged to be an acute angle or an obtuse angle. In some embodiments, the second direction F2 can be arranged to be an angle with the radial direction of the circulating tank 10. For example, the second heat dissipation member 332 is inclined relative to the first heat dissipation member 331 towards the top 102 or the bottom 103 of the circulating tank 10, or inclined towards the side wall 12 of the circulating tank 10. In some embodiments, the second heat dissipation member 332 is arranged to extend in a meandering manner to increase the contact area of the second heat dissipation member 332 with the slurry.

[0053] The second heat dissipation member 332 is arranged in a plurality of second heat dissipation members 332 arranged at intervals in the first direction F1. The number of second heat dissipation members 332 can be arranged according to actual needs, which is not limited in the present application. For example, the number of second heat dissipation members 332 can be 2, 3, 4, 5, etc. In the process of driving the slurry to circulate, the flow speed of the slurry close to the bottom 103 of the circulating tank 10 is greater than that close to the top 102 of the circulating tank 10. The interval between adjacent two second heat dissipation members 332 decreases or is equal from the top cover 11 towards the bottom 103 of the circulating tank 10, and / or the length of the second heat dissipation member 332 close to the bottom 103 of the circulating tank 10 is greater than or equal to the length of the second heat dissipation member 332 close to the top cover 11, so as to increase the contact area of the second heat dissipation member 332 with the slurry with high flow speed, thereby improving the heat dissipation efficiency. The length of the second heat dissipation member 332 can refer to the distance between the free end of the second heat dissipation member 332 and the first heat dissipation member 331, or the extension length of the second heat dissipation member 332. The extension length of the second heat dissipation member 332 is greater than the width of the first heat dissipation member 331 in the radial direction of the circulating tank 10.

[0054] In some embodiments, the interval between adjacent two second heat dissipation members 332 decreases from the top cover 11 towards the bottom 103 of the circulating tank 10. Among the plurality of second heat dissipation members 332, the interval between adjacent two second heat dissipation members 332 can decrease in an arithmetic relationship, decrease in a geometric relationship, or decrease irregularly, etc. in the first direction F1. In some embodiments, the interval between adjacent two second heat dissipation members 332 can also be equal.

[0055] In some embodiments, the length of the second heat dissipation member 332 close to the bottom 103 of the circulating tank 10 is greater than the length of the second heat dissipation member 332 close to the top cover 11. Wherein, along the first direction F1, the length of the plurality of second heat dissipation members 332 can be lengthened in an arithmetic relationship, lengthened in a geometric relationship, or irregularly lengthened, etc. In some embodiments, the plurality of second heat dissipation members 332 includes at least two groups, each group includes at least two second heat dissipation members 332, the length of the second heat dissipation members 332 in each group is the same, and the length of the second heat dissipation members 332 close to the bottom 103 is greater than the length of the second heat dissipation members 332 close to the top cover 11.

[0056] In some embodiments, a branch channel is arranged in the second heat dissipation member 332. The branch channel is in communication with the heat conduction channel 3311. A heat conduction medium is arranged in the heat conduction channel 3311 and the branch channel. The heat conduction medium can circulate between the branch channel and the heat conduction channel 3311, thereby conducting the heat of the second heat dissipation member 332 to the first heat dissipation member 331, and conducting to the outside of the circulating tank 10 through the first heat dissipation member 331. Exemplarily, the number of branch channels can be one. In some embodiments, the number of branch channels can be multiple to improve the heat dissipation capacity of the second heat dissipation member 332. The plurality of branch channels are arranged at intervals or in communication with each other and staggered.

[0057] The second heat dissipation member 332 can be configured as a sheet structure. The thickness of the second heat dissipation member 332 is less than the width. Wherein, the cross section of the second heat dissipation member 332 can be rectangular, elliptical, fusiform, etc. The width direction of the cross section of the second heat dissipation member 332 is arranged obliquely on the projection of the first direction F1 on the plane where the cross section of the second heat dissipation member 332 is located, that is, the width direction of the cross section of the second heat dissipation member 332 is arranged at an angle with the first direction F1. The width direction of the cross section of the second heat dissipation member 332 is the long side direction of the cross section. In this way, when the slurry impacts the second heat dissipation member 332, the second heat dissipation member 332 can guide the flow of the slurry, so that the slurry flows towards the dispersion structure 20, to promote the circulation and dispersion of the slurry. Exemplarily, the cross section of the second heat dissipation member 332 can extend in a straight line. In some embodiments, the cross section of the second heat dissipation member 332 can also extend in an arc shape.

[0058] Please refer to Figure 4 and Figure 5The second heat dissipation member 332 is provided with an inclined surface 3322 on the side close to the dispersion structure 20. When the slurry impacts the inclined surface 3322, the inclined surface 3322 exerts a reaction force on the slurry in the axial direction of the circulating tank 10, so that the slurry flows towards the dispersion structure 20. In a plane perpendicular to the extension direction of the second heat dissipation member 332, the second heat dissipation member 332 includes an inclined side edge in the cross section close to the side of the bottom 103 of the circulating tank 10, and the inclined side edge extends in the second direction F2 to form the inclined surface 3322. The width direction of the second heat dissipation member 332 is the extension direction of the inclined side edge. The inclined side edge forms an acute angle a with the first direction F1. Exemplarily, the angle a can be 45°, so that the second heat dissipation member 332 has better flow guiding capability on the slurry. In an embodiment, the angle a can also be 25°, 30°, 35°, 40°, 50°, 55°, 60°, 65°, etc., which is not limited in the present application.

[0059] In some embodiments, the second heat dissipation member 332 is provided with a flow guiding hole. The flow guiding hole penetrates the second heat dissipation member 332. Understandably, due to the blocking effect of the second heat dissipation member 332, when the slurry flows, a vortex area is formed on the side of the second heat dissipation member 332 downstream of the flow direction of the slurry. Exemplarily, the vortex area is located on the side of the second heat dissipation member 332 away from the inclined surface 3322. The slurry lingers in the vortex area, the flow rate of the slurry in the vortex area is low, the slurry is easy to adhere to the second heat dissipation member 332, forming a dirt thermal resistance effect, thereby reducing the heat dissipation capacity of the second heat dissipation member 332. The flow guiding hole can make part of the slurry flow through the flow guiding hole to the side of the second heat dissipation member 332 downstream of the flow direction of the slurry when the slurry flows through the surface of the second heat dissipation member 332, thereby reducing the size of the vortex area, reducing the size of the pressure resistance caused by the slurry flowing through the second heat dissipation member 332, reducing the flow rate loss of the slurry, and the slurry flowing through the flow guiding hole can timely take away the slurry lingering in the vortex area, reduce the slurry adhering to the second heat dissipation member 332, reduce the dirt thermal resistance effect, and thereby improve the heat dissipation capacity of the second heat dissipation member 332. In addition, the flow guiding hole can also make the slurry form a flow, thereby improving the stirring and mixing effect of the slurry. The diameter of the flow guiding hole can be specifically set according to actual needs, which is not limited in the present application. In some embodiments, a branch channel can be arranged around the flow guiding hole to improve the heat exchange efficiency of the second heat dissipation member 332.

[0060] Please refer to Figure 6In some embodiments, the heat dissipation structure 30 is provided with a flow guiding structure 3324 along the sidewall 12 in the circumferential direction of the circulation tank 10. The flow guiding structure 3324 is used to form a turbulent flow near the surface of the heat dissipation structure 30 when the slurry flows through the surface of the heat dissipation structure 30, so as to reduce the fluid separation effect when the slurry flows through the heat dissipation structure 30, thereby reducing the size of the vortex area formed on the side of the heat dissipation structure 30 downstream of the flow direction of the slurry, reducing the size of the pressure resistance caused by the slurry flowing through the heat dissipation structure 30, and further reducing the flow rate loss of the slurry. In addition, the flow guiding structure 3324 can also reduce the slurry adhered to the heat dissipation structure 30, reduce the dirt thermal resistance effect, and increase the contact area between the heat dissipation structure 30 and the slurry, thereby improving the heat dissipation capacity of the heat dissipation structure 30.

[0061] The flow guiding structure 3324 can be configured as flow guiding grooves and / or flow guiding protrusions on the heat dissipation structure 30. In some embodiments, the flow guiding structure 3324 is configured as flow guiding protrusions protruding from the first heat dissipation member 331. The flow guiding protrusions are arranged in multiple groups and are arranged at intervals. In some embodiments, the flow guiding structure 3324 is configured as flow guiding grooves formed in the first heat dissipation member 331. The flow guiding grooves are arranged in multiple groups and are arranged at intervals. In some embodiments, the flow guiding structure 3324 can also be configured as multiple flow guiding grooves and multiple flow guiding protrusions formed in the first heat dissipation member 331. The multiple flow guiding grooves and the multiple flow guiding protrusions are arranged at intervals, respectively. In some embodiments, the flow guiding structure 3324 can also be configured as flow guiding grooves and / or flow guiding protrusions arranged on the second heat dissipation member 332.

[0062] Please refer to Figure 1 , Figure 4 and Figure 7The heat dissipation structure 30 is configured as a heat pipe, for example. The heat pipe is provided with a heat conduction channel 3311. The heat conduction channel 3311 is configured as a capillary channel. The first heat dissipation member 331 can be configured as a heat pipe. The heat pipe includes a first section 311 and a second section 312 connected to the first section 311. The first section 311 is located in the accommodation cavity 101. The second section 312 is located outside the circulating tank 10. When the slurry is stored in the circulating tank 10, the first section 311 is immersed in the slurry. The heat conduction medium in the first section 311 vaporizes after absorbing heat of the slurry and flows to the second section 312 along the heat conduction channel 3311. The vaporized heat conduction medium condenses into a liquid state in the second section 312. The liquid-state heat conduction medium flows back to the first section 311 due to the capillary principle. The heat conduction medium reciprocates between the first section 311 and the second section 312, thereby achieving heat dissipation of the slurry. In this way, the heat dissipation structure 30 can drive the circulation flow of the heat conduction medium in the heat conduction channel 3311 spontaneously through the temperature difference between the slurry and the external environment, avoiding the need to set an additional driving structure, thereby reducing the power consumption of the pulping equipment 100 and lowering the use cost of the pulping equipment 100. The boiling point of the heat conduction medium can be configured as 25-45°C, for example. The boiling point of the heat conduction medium can be 25°C, 26°C, 30°C, 35°C, 40°C, 45°C, etc.

[0063] In some embodiments, the heat pipe further includes a third section 313 connected between the first section 311 and the second section 312. The third section 313 is at least partially located in the accommodation cavity 101. The third section 313 is located above the slurry, or the third section 313 can be partially immersed in the slurry. The third section 313 is configured as an adiabatic section, which is used to reduce heat exchange between the heat conduction medium located in the third section 313 and the external environment. When the heat conduction medium in the first section 311 vaporizes and flows along the heat conduction channel 3311, the third section 313 is used to avoid heat of the vaporized heat conduction medium from being dissipated to the space between the top cover 11 and the slurry, so that the vaporized heat conduction medium flows to the second section 312, thereby conducting heat of the slurry to the outside of the circulating tank 10.

[0064] In some embodiments, fins 314 are provided on the first section 311 and / or the second section 312 to increase the heat conduction area, thereby increasing the heat absorption capacity of the first section 311 and / or the heat dissipation capacity of the second section 312. The fins 314 can be provided in multiple numbers and spaced apart from each other. The number of fins can be specifically set according to actual needs, which is not specifically limited in the present application. In some embodiments, fins 314 are provided on the first section 311. In some embodiments, fins 314 are provided on the second section 312. In some embodiments, fins 314 are provided on the first section 311 and the second section 312, respectively.

[0065] In some embodiments, the heat dissipation structure 30 further comprises a temperature control member 315. The temperature control member 315 is arranged outside the circulating tank 10 and is used to control the temperature of the second section 312. The temperature control member 315 can indirectly control the temperature of the first section 311 by regulating the temperature of the second section 312, thereby achieving the regulation of the temperature of the slurry. The temperature control member 315 can be configured as a cooling jacket, a cooling fan, etc.

[0066] In some embodiments, the heat dissipation structure 30 further comprises a protective sleeve 316. The protective sleeve 316 is hollow, and the heat pipe is arranged inside the protective sleeve 316. The protective sleeve 316 is used to protect the heat pipe, avoid the contact between the slurry and the heat pipe, avoid the erosion of the slurry to the heat pipe, and avoid the pollution of the heat pipe to the slurry. The second heat dissipation member 332 is connected to the protective sleeve 316.

[0067] Please refer to Figure 8 In some embodiments, the heat dissipation structure 30 comprises a first pipe section 321 and a second pipe section 322. The first heat dissipation member 331 can be configured as the first pipe section 321 and the second pipe section 322. The heat conduction channel 3311 comprises a first flow channel 3211 and a second flow channel 3221. The first flow channel 3211 is arranged in the interior of the first pipe section 321. The first pipe section 321 is arranged in the interior of the second pipe section 322. The second flow channel 3221 is formed between the outer wall of the first pipe section 321 and the inner wall of the second pipe section 322. The end of the first pipe section 321 and the end of the second pipe section 322 are connected to communicate with each other, so that the first flow channel 3211 and the second flow channel 3221 are connected in communication. The end of the second pipe section 322 arranged in the accommodating cavity 101 is closed. The heat conduction medium circulates and flows between the first flow channel 3211 and the second flow channel 3221. One end of the second pipe section 322 extends into the circulating tank 10, and the other end extends to the outside of the circulating tank 10. One end of the first pipe section 321 extends into the circulating tank 10, and the other end extends to the outside of the circulating tank 10. The heat conduction medium in the second flow channel 3221 flows to the outside of the circulating tank 10 to dissipate heat after absorbing the heat of the slurry, and the cooled heat conduction medium flows into the circulating tank 10 from the first flow channel 3211. In some embodiments, the heat conduction medium in the second flow channel 3221 flows into the first flow channel 3211 after absorbing the heat of the slurry, and flows to the outside of the circulating tank 10 through the first flow channel 3211 to dissipate heat, and the cooled heat conduction medium flows into the circulating tank 10 from the second flow channel 3221.

[0068] The cross-sectional shape of the first pipe portion 321 can be circular, oval, polygonal, or the like. The cross-sectional shape of the second pipe portion 322 can be circular, oval, polygonal, or the like. The cross-sectional shape of the first pipe portion 321 can be the same as or different from the cross-sectional shape of the second pipe portion 322. In some embodiments, fins can be provided on the second pipe portion 322 to increase the heat exchange efficiency between the second pipe portion 322 and the slurry and improve the heat dissipation effect.

[0069] In some embodiments, the diameter of the second pipe portion 322 at a position close to the bottom 103 of the circulating tank 10 is greater than the diameter of the second pipe portion 322 at a position close to the top 102 of the circulating tank 10, so as to increase the content of the heat conducting medium of the second pipe portion 322 at the position close to the bottom 103 of the circulating tank 10, thereby improving the heat dissipation effect on the slurry close to the bottom 103 of the circulating tank 10 and improving the uniformity of the internal temperature of the slurry.

[0070] Please refer to Figure 9 In some embodiments, the first pipe portion 321 is located outside the second pipe portion 322. The first pipe portion 321 is provided with a first flow channel 3211. The second pipe portion 322 is provided with a second flow channel 3221. The end of the first pipe portion 321 and the end of the second pipe portion 322 are connected. Exemplarily, the first pipe portion 321 and the second pipe portion 322 can be connected to form a U-shaped structure. In some embodiments, the first pipe portion 321 and the second pipe portion 322 can also be connected to form a V-shaped, wavy, or the like structure, which is not specifically limited in the present application. The second heat dissipation member 332 can be connected to the first pipe portion 321 and / or the second pipe portion 322. In some embodiments, the extension length of the first pipe portion 321 in the circulating tank 10 is greater than the extension length of the second pipe portion 322 in the circulating tank 10, so that the heat conducting medium in the first pipe portion 321 can quickly flow out of the second pipe portion 322 to the outside of the circulating tank 10 for heat dissipation after absorbing the slurry. The first pipe portion 321 can extend linearly, arcuately, or serpentine in the circulating tank 10. The second pipe portion 322 can extend linearly, arcuately, or serpentine in the circulating tank 10.

[0071] In some embodiments, the heat dissipation structure 30 further comprises a pumping member. The pumping member is located outside the circulating tank 10. The pumping member is used to extract the heat-conducting medium from one of the first flow channel 3211 and the second flow channel 3221, and pump the heat-conducting medium into the other of the first flow channel 3211 and the second flow channel 3221, so as to make the heat-conducting medium circulate between the first flow channel 3211 and the second flow channel 3221. In this way, the pumping member drives the heat-conducting medium to actively circulate in the heat-conducting channel 3311, and the heat dissipation efficiency of the heat dissipation structure 30 can be adjusted by adjusting the circulation speed of the heat-conducting medium, so as to adapt to the heat dissipation needs of the slurry at different dispersion stages, improve the temperature adjustment accuracy of the slurry, improve the temperature consistency of the slurry, and improve the quality of the slurry.

[0072] In some embodiments, the boiling point of the heat-conducting medium is less than the maximum temperature of the slurry, and the heat-conducting medium fills the heat-conducting channel 3311. The pumping member pumps the liquid heat-conducting medium to circulate between the first flow channel 3211 and the second flow channel 3221. In some embodiments, the boiling point of the heat-conducting medium is higher than or equal to the maximum temperature of the slurry, and the heat-conducting medium partially fills the heat-conducting channel 3311. The heat-conducting medium is vaporized by being heated by the slurry in the second flow channel, and flows along the second flow channel 3221 to the pumping member. The pumping member compresses the vaporized heat-conducting medium to make the heat-conducting medium release heat and liquefy, and pumps the liquefied heat-conducting medium into the first flow channel 3211.

[0073] Please refer to Figure 1 In some embodiments, the pulping device 100 further comprises a stirring paddle 40. The stirring paddle 40 comprises a rotating shaft 41 and a plurality of stirring blades 42. The rotating shaft 41 extends in the axial direction of the circulating tank 10. The plurality of stirring blades 42 are respectively connected to the rotating shaft 41 and are arranged in the extension direction of the rotating shaft 41. The stirring blades 42 are used to push the slurry to flow in the direction of the dispersion structure 20. In some embodiments, the plurality of stirring blades 42 are also arranged in the circumferential direction of the rotating shaft 41. For example, the plurality of stirring blades 42 can be divided into a plurality of groups, the plurality of groups of stirring blades 42 are arranged in the circumferential direction of the rotating shaft 41, each group comprises a plurality of stirring blades 42, and the plurality of stirring blades 42 in each group are arranged in the extension direction of the rotating shaft 41. The number of stirring blades 42 can be specifically set according to actual needs, which is not limited in the present application. For example, the number of stirring blades 42 can be 6, 9, 12, etc.

[0074] The extending direction of the stirring blade 42 intersects with the extending direction of the rotating shaft 41. Exemplarily, the stirring blade 42 extends along the radial direction of the rotating shaft 41. In some embodiments, the extending direction of the stirring blade 42 forms an acute angle with the axial direction of the rotating shaft 41. The stirring blade 42 is inclined towards the bottom 103 or the top 102 of the circulating tank 10. In some embodiments, the stirring blade 42 can also extend in a curved manner. When the rotating shaft 41 drives the stirring blade 42 to rotate, the stirring blade 42 cuts the slurry, thereby reducing the rotating resistance of the stirring paddle 40. In some embodiments, the stirring blade 42 extends in a meandering manner.

[0075] In the axial direction of the circulating tank 10, the plurality of stirring blades 42 and the plurality of second heat dissipation members 332 are arranged alternately. When the rotating shaft 41 drives the stirring blade 42 to rotate, the stirring blade 42 meets the second heat dissipation member 332 and shears the slurry, thereby improving the mixing uniformity of the slurry. In some embodiments, the plurality of stirring blades 42 are arranged in a spiral manner along the axial direction of the rotating shaft 41. When the rotating shaft 41 drives the stirring blade 42 to rotate, the plurality of stirring blades 42 meet the second heat dissipation member 332 in turn, avoiding the plurality of stirring blades 42 from meeting the plurality of second heat dissipation members 332 at the same time, thereby avoiding the plurality of stirring blades 42 and the plurality of second heat dissipation members 332 from shearing the slurry at the same time, reducing the reaction force of the slurry on the stirring blade 42, and reducing the rotating resistance of the stirring paddle 40. In addition, when the rotating shaft 41 drives the plurality of stirring blades 42 to rotate, the plurality of stirring blades 42 arranged in a spiral manner can drive the slurry to flow along the axial direction of the rotating shaft 41, thereby driving the slurry to move towards the dispersion structure 20, and improving the circulating efficiency of the slurry in the circulating tank 10. In some embodiments, the arrangement direction of the plurality of stirring blades 42 is parallel to the axial direction of the rotating shaft 41, so as to reduce the installation difficulty of the stirring blade 42.

[0076] The stirring blade 42 can be configured as a sheet structure. The thickness of the stirring blade 42 is smaller than the width. The cross section of the stirring blade 42 can be rectangular, elliptical, fusiform, etc. The width direction of the cross section of the stirring blade 42 is inclined relative to the normal projection of the axial direction of the rotating shaft 41 on the plane where the cross section of the stirring blade 42 is located, i.e., the width direction of the cross section of the stirring blade 42 forms an angle with the axial direction of the rotating shaft 41. The width direction of the cross section of the stirring blade 42 is the long side direction of the cross section. In this way, when the slurry impacts the stirring blade 42, the stirring blade 42 can push the slurry to flow towards the dispersion structure 20, so as to promote the circulation and dispersion of the slurry.

[0077] The tilting direction of the stirring blade 42 corresponds to the rotating direction of the stirring paddle 40. In some embodiments, the stirring blade 42 tilts in a left-handed direction from the top 102 of the circulating tank 10 towards the bottom 103 when the stirring paddle 40 rotates clockwise. The stirring blade 42 tilts towards the top 102 of the circulating tank 10 along the clockwise direction of the rotating shaft 41 from the top 102 of the circulating tank 10 towards the bottom 103. In some embodiments, the stirring blade 42 tilts in a right-handed direction from the top 102 of the circulating tank 10 towards the bottom 103 when the stirring paddle 40 rotates counterclockwise. The stirring blade 42 tilts towards the top 102 of the circulating tank 10 along the counterclockwise direction of the rotating shaft 41 from the top 102 of the circulating tank 10 towards the bottom 103.

[0078] The tilting direction of the second heat-dissipating member 332 corresponds to the rotating direction of the stirring paddle 40. In some embodiments, the second heat-dissipating member 332 tilts in a left-handed direction from the top 102 of the circulating tank 10 towards the bottom 103 when the stirring paddle 40 rotates clockwise. The second heat-dissipating member 332 tilts towards the top 102 of the circulating tank 10 along the clockwise direction of the first heat-dissipating member 331 from the top 102 of the circulating tank 10 towards the bottom 103. In some embodiments, the second heat-dissipating member 332 tilts in a right-handed direction from the top 102 of the circulating tank 10 towards the bottom 103 when the stirring paddle 40 rotates counterclockwise. The second heat-dissipating member 332 tilts towards the top 102 of the circulating tank 10 along the counterclockwise direction of the first heat-dissipating member 331 from the top 102 of the circulating tank 10 towards the bottom 103. In some embodiments, the tilting direction of the stirring blade 42 is the same as the tilting direction of the second heat-dissipating member 332, so that the moving direction of the slurry pushed by the stirring blade 42 is the same as the moving direction of the slurry pushed by the second heat-dissipating member 332, thereby facilitating the flow of the slurry towards the dispersion structure 20 and improving the circulating efficiency of the slurry.

[0079] The end of the second heat-dissipating member 332 away from the first heat-dissipating member 331 is spaced apart from the rotating shaft 41. The stirring blade 42 is spaced apart from the wall-scraping blade 43. The distance between the end of the second heat-dissipating member 332 away from the first heat-dissipating member 331 and the rotating shaft 41 is greater than the distance between the second heat-dissipating member 332 and the adjacent stirring blade 42. In this way, the gap between the second heat-dissipating member 332 and the rotating shaft 41 can provide sufficient flow space for the slurry when the stirring blade 42 meets the second heat-dissipating member 332, thereby reducing the rotating resistance of the stirring paddle 40.

[0080] The distance between the end of the second heat dissipation member 332 away from the first heat dissipation member 331 and the rotating shaft 41 is greater than or equal to the distance between the end of the stirring blade 42 away from the rotating shaft 41 and the first heat dissipation member 331. The distance between the end of the second heat dissipation member 332 away from the first heat dissipation member 331 and the rotating shaft 41 can be set according to actual needs, which is not limited in the present application. The distance between the second heat dissipation member 332 and the adjacent stirring blade 42 can be set according to actual needs, which is not limited in the present application.

[0081] In some embodiments, the extension length of the second heat dissipation member 332 is greater than or equal to the extension length of the stirring blade 42. In some embodiments, the extension length of the stirring blade 42 is greater than or equal to the extension length of the second heat dissipation member 332.

[0082] In some embodiments, the stirring blade 42 is provided with a through hole. It can be understood that when the slurry flows, due to the blocking effect of the stirring blade 42, a vortex area will be formed on the side of the stirring blade 42 downstream of the flow direction of the slurry, that is, the side of the stirring blade 42 facing the top 102 of the circulating tank 10. The through hole can allow part of the slurry to flow to the side of the stirring blade 42 downstream of the flow direction of the slurry through the through hole when the slurry flows through the surface of the stirring blade 42, thereby reducing the size of the vortex area, reducing the size of the pressure resistance caused by the slurry flowing through the stirring blade 42, reducing the flow velocity loss of the slurry, and reducing or avoiding the shaking of the stirring blade 42 caused by the Karman vortex street effect, improving the stability and reliability of the stirring blade 40 when rotating, thereby improving the service life of the stirring blade 40. In addition, the through hole can also cause the slurry to form a flow, thereby improving the stirring and mixing effect of the slurry. The diameter of the through hole can be set according to actual needs, which is not limited in the present application.

[0083] In some embodiments, the stirring blade 40 further comprises a wall scraping blade 43. The wall scraping blade 43 is connected to the rotating shaft 41 and is used to scrape the slurry adhering to the inner wall of the circulating tank 10, so as to promote the circulation of the slurry and improve the dispersion effect of the slurry. The rotating shaft 41 drives the wall scraping blade 43 to rotate. The wall scraping blade 43 is arranged in a spaced manner with the stirring blade 42 to avoid interference with the stirring blade 42. The wall scraping blade 43 can be provided in a plurality, and the plurality of wall scraping blades 43 are arranged in a spaced manner along the circumference of the rotating shaft 41 to improve the scraping effect of the slurry.

[0084] The wall scraping blade 43 comprises a first blade portion 431 and a second blade portion 432. The first blade portion 431 is connected to the rotating shaft 41. The second blade portion 432 is connected to the end of the first blade portion 431 away from the rotating shaft 41. The first blade portion 431 is arranged close to the bottom wall 13 of the circulating tank 10.

[0085] The first paddle portion 431 is used to scrape the slurry adhered to the bottom wall 13. The second paddle portion 432 is arranged close to the side wall 12 of the circulating tank 10.

[0086] The second paddle portion 432 is used to scrape the slurry adhered to the side wall 12.

[0087] Exemplarily, in a projection plane perpendicular to the central axis C1 of the circulating tank 10, the orthographic projection of the first paddle portion 431 and the orthographic projection of the second paddle portion 432 are respectively along the radial direction of the circulating tank 10. In some embodiments, in the projection plane perpendicular to the central axis C1 of the circulating tank 10, the orthographic projection of the first paddle portion 431 is arranged in a spiral shape. In this way, when the rotating shaft 41 drives the first paddle portion 431 to rotate, the first paddle portion 431 can form a cutting action on the slurry, thereby reducing the resistance of the first paddle portion 431 to the slurry. In some embodiments, the second paddle portion 432 is arranged in a spiral shape along the axial direction of the circulating tank 10. In this way, when the rotating shaft 41 drives the second paddle portion 432 to rotate, the second paddle portion 432 can form a cutting action on the slurry, thereby reducing the resistance of the second paddle portion 432 to the slurry. In some embodiments, the first paddle portion 431 and the second paddle portion 432 are respectively arranged in a spiral shape to reduce the resistance when the stirring paddle 40 rotates.

[0088] The first paddle portion 431 comprises a first paddle segment 4311 and a second paddle segment 4312. The first paddle segment 4311 is connected to the rotating shaft 41 and is located on the side of the dispersion structure 20 away from the bottom wall 13 of the circulating tank 10. The first paddle segment 4311 is arranged obliquely towards the bottom wall 13 of the circulating tank 10 relative to the rotating shaft 41. The first paddle segment 4311 of the plurality of scraping wall blades 43 forms a clearance space with the bottom wall 13 when rotating, and the dispersion structure 20 is located in the clearance space, thereby avoiding interference between the scraping wall blades 43 and the dispersion structure 20. The second paddle segment 4312 is connected to the end of the first paddle segment 4311 away from the rotating shaft 41 and is located between the dispersion structure 20 and the side wall 12 of the circulating tank 10. The second paddle segment 4312 is arranged close to the bottom wall 13 of the circulating tank 10. The second paddle segment 4312 is arranged spaced apart from the dispersion structure 20 to reduce the blocking effect of the second paddle segment 4312 on the slurry discharged by the dispersion structure 20, reduce the loss of flow rate of the slurry, and improve the circulation ability of the slurry in the circulating tank 10. The second paddle portion 432 is connected to the end of the second paddle segment 4312 away from the first paddle segment 4311. In some embodiments, the first paddle segment 4311 is arranged close to the dispersion structure 20 and is used to scrape the slurry adhered to the side of the dispersion structure 20 away from the bottom wall 13 of the circulating tank 10.

[0089] In some embodiments, the stirring paddle 40 further comprises scraping pieces 44. The scraping pieces 44 are arranged on the wall scraping blades 43. The scraping pieces 44 are used to abut against the inner wall of the circulating tank 10 and / or the dispersion structure 20 to scrape the slurry. The scraping pieces 44 are arranged in multiple. The scraping pieces 44 on different wall scraping blades 43 are arranged at different positions. When the stirring paddle 40 rotates, the scraping working surfaces formed by the scraping pieces 44 on the wall scraping blades 43 cover the side wall 12, the bottom wall 13 of the circulating tank 10 and the side surface of the dispersion structure 20 away from the bottom wall 13 of the circulating tank 10. In this way, when the stirring paddle 40 rotates, the scraping pieces 44 on different wall scraping blades 43 can scrape the slurry at different positions, thereby reducing the reaction force of the slurry borne by a single wall scraping blade 43 and avoiding the problem of bending or breaking of the wall scraping blade 43.

[0090] In some embodiments, the rotating shaft 41 can comprise a first shaft and a second shaft. The first shaft is hollowly arranged, and the second shaft is arranged in the first shaft. The stirring blades 42 are connected to the first shaft. The wall scraping blades 43 are connected to the second shaft. The first shaft and the second shaft can rotate independently of each other to realize the rotation of the stirring blades 42 and the wall scraping blades 43 at different speeds. In some embodiments, the rotating shaft 41 can also be configured as a single shaft body, and the stirring blades 42 and the wall scraping blades 43 are connected to the rotating shaft 41. The rotating shaft 41 drives the stirring blades 42 and the wall scraping blades 43 to rotate synchronously.

[0091] Please refer to Figure 1 and Figure 10 In some embodiments, the rotating shaft 41 is provided with a flow guide groove 411. The flow guide groove 411 is provided with a flow guide sleeve 412. The flow guide sleeve 412 is spaced apart from the side wall of the flow guide groove 411 to form a cooling flow channel 413. The cooling flow channel 413 is provided with a cooling medium. The cooling medium is used to cool the rotating shaft 41, thereby cooling the slurry. The cooling medium can be a liquid or a gas. For example, the cooling medium can be water, oil, etc. The cooling medium in the cooling flow channel 413 flows to the outside of the circulating tank 10 after absorbing the heat of the slurry, and the cooled cooling medium flows into the circulating tank 10 from the flow guide sleeve 412.

[0092] The flow guide sleeve 412 is rotatably or fixedly arranged relative to the rotating shaft 41. For example, the flow guide sleeve 412 is arranged on the top cover 11 and is rotatable relative to the rotating shaft 41. In this way, the flow guide sleeve 412 is fixed relative to the top cover 11 when the rotating shaft 41 rotates, thereby facilitating the assembly of the flow guide sleeve 412. The flow guide sleeve 412 and the top cover 11 are detachably connected together, thereby facilitating the assembly and replacement of the flow guide sleeve 412. In some embodiments, the flow guide sleeve 412 can be rotatably connected to the top cover 11.

[0093] In some embodiments, the pulp preparation device 100 further comprises a temperature measuring member. The temperature measuring member is configured to measure the temperature of the pulp. The temperature measuring member is connected to the top cover 11 and extends at least partially into the containing cavity 101. The end of the temperature measuring member is immersed in the pulp. In some embodiments, the distance between the end of the temperature measuring member and the bottom wall 13 is less than the distance between the end of the temperature measuring member and the top cover 11. The ratio of the distance between the end of the temperature measuring member and the liquid surface of the pulp to the distance between the liquid surface of the pulp and the bottom wall 13 is greater than 0.2. For example, the ratio of the distance between the end of the temperature measuring member and the liquid surface of the pulp to the distance between the liquid surface of the pulp and the bottom wall 13 can be 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, etc. The liquid surface of the pulp can be the liquid surface formed by the pulp contained in the circulating tank 10 when the circulating tank 10 is filled to its rated capacity. The distance between the liquid surface of the pulp and the bottom wall 13 of the circulating tank 10 refers to the distance between the bottom wall 13 and the liquid surface along the axial direction of the circulating tank 10 when the pulp in the circulating tank 10 is in a static state. In some embodiments, the temperature measuring member can also be connected to the stirring paddle 40 or the side wall 12 of the circulating tank 10.

[0094] In some embodiments, the circulating tank 10 is provided with a heat dissipation jacket 50. The heat dissipation jacket 50 wraps the side wall 12 and / or the bottom wall 13. The heat dissipation jacket 50 is configured to be filled with a cooling medium to cool the side wall 12 and / or the bottom wall 13 by the cooling medium, thereby dissipating heat from the pulp through the side wall 12 and / or the bottom wall 13.

[0095] In some embodiments, the pulp preparation device 100 further comprises a feeding structure. The top cover 11 is provided with a feeding opening. The feeding structure is connected to the feeding opening. The feeding structure is configured to feed solid materials into the circulating tank 10. The feeding structure can be configured as a double screw feeding mechanism.

[0096] In some embodiments, the pulp preparation device 100 further comprises a liquid inlet structure. The top cover 11 is provided with a liquid inlet opening. The liquid inlet structure comprises a liquid inlet pipe. The liquid inlet pipe is arranged in the liquid inlet opening and extends into the containing cavity 101. The opening of the liquid inlet pipe in the containing cavity 101 is arranged to face the side wall 12 of the circulating tank 10, so that when the liquid inlet pipe delivers liquid materials into the circulating tank 10, the liquid materials will flow down along the side wall 12, thereby reducing the impact force of the liquid materials on the liquid surface, reducing or avoiding splashing of the liquid materials, and avoiding mixing of gas into the liquid materials.

[0097] The above merely describes specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any modifications or replacements within the technical scope disclosed by the present application can be easily conceived by those skilled in the art, and these modifications or replacements shall be encompassed within the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A pulping plant (100) characterized in that, The application relates to a circulating tank for slurry, which comprises the following components: a circulating tank (10) provided with a containing cavity (101) for containing slurry; a top cover (11) arranged on the top (102) of the circulating tank (10); a dispersion structure (20) arranged in the containing cavity (101) and on the bottom (103) of the circulating tank (10), which is used for dispersing the slurry and making the slurry flow in the circulating tank (10); a heat dissipation structure (30) connected to the top cover (11), which is at least partially arranged inside the containing cavity (101) and is used for dissipating heat of the slurry; the heat dissipation structure (30) comprises a first heat dissipation member (331) connected to the top cover (11) and extending in a first direction (F1) in the containing cavity (101), and a second heat dissipation member (332) connected to the first heat dissipation member (331) and extending in a second direction (F2) in the containing cavity (101); the first direction (F1) intersects the second direction (F2); an inclined surface (3322) is arranged on the side of the second heat dissipation member (332) close to the dispersion structure (20); a heat dissipation jacket (50) arranged on the circulating tank (10).

2. The pulping apparatus (100) according to claim 1, characterized in that The ratio of a first distance (D1) between the heat dissipation structure (30) and the side wall (12) of the circulating tank (10) to a second distance (D2) between the heat dissipation structure (30) and the central axis (C1) of the circulating tank (10) is 0.2-0.

8.

3. The pulping apparatus (100) according to claim 1, characterized in that The heat dissipation structure (30) is arranged in multiple, and the multiple heat dissipation structures (30) are arranged in a circumferential direction of the circulating tank (10).

4. The pulping apparatus (100) according to claim 1, characterized in that The heat dissipation structure (30) is provided with a heat conduction channel (3311) provided with a heat conduction medium circulating in the heat conduction channel (3311).

5. The pulping apparatus (100) according to claim 4, characterized in that The heat dissipation structure (30) is configured as a heat pipe provided with the heat conduction channel (3311), the heat conduction channel (3311) is configured as a capillary channel, and the heat pipe comprises a first segment (311) and a second segment (312) connected to the first segment (311); the first segment (311) is arranged in the containing cavity (101), and the second segment (312) is arranged outside the circulating tank (10).

6. The pulping apparatus (100) according to claim 5, characterized in that The heat dissipation structure (30) further comprises a fin (314) arranged on the first segment (311) and / or the second segment (312).

7. The pulping apparatus (100) according to claim 5, characterized in that The heat dissipation structure (30) further comprises a temperature control member (315) arranged outside the circulating tank (10) and used for controlling the temperature of the second segment (312).

8. The pulping apparatus (100) according to claim 4, characterized in that The heat dissipation structure (30) comprises a first pipe portion (321) and a second pipe portion (322), the heat conduction channel (3311) comprises a first flow channel (3211) and a second flow channel (3221), the first flow channel (3211) is arranged in the first pipe portion (321), the first pipe portion (321) is arranged in the second pipe portion (322), the second flow channel (3221) is formed between the outer wall of the first pipe portion (321) and the inner wall of the second pipe portion (322), and the end of the first pipe portion (321) is communicated with the end of the second pipe portion (322); or the first pipe portion (321) is arranged outside the second pipe portion (322), the first flow channel (3211) is arranged in the first pipe portion (321), the second flow channel (3221) is arranged in the second pipe portion (322), and the end of the first pipe portion (321) is communicated with the end of the second pipe portion (322).

9. The pulping apparatus (100) according to claim 8, characterized in that The heat dissipation structure (30) further comprises a pumping member, which is used for pumping the heat conduction medium from the second flow channel (3221) to the first flow channel (3211).

10. The pulping apparatus (100) according to claim 1, characterized in that The second heat dissipation member (332) is arranged in a plurality of forms, and the plurality of second heat dissipation members (332) are arranged in a spaced manner along the first direction (F1).

11. The pulping apparatus (100) according to claim 10, characterized in that The first heat dissipation member (331) is provided with a heat conduction channel (3311), the second heat dissipation member (332) is provided with a branch channel, the branch channel is communicated with the heat conduction channel (3311), and the heat conduction channel (3311) and the branch channel are provided with a heat conduction medium.

12. The pulping apparatus (100) according to claim 10, characterized in that The distance between two adjacent second heat dissipation members (332) decreases or is equal from the top cover (11) to the bottom (103) of the circulating tank (10), and / or the length of the second heat dissipation member (332) close to the bottom (103) of the circulating tank (10) is greater than or equal to the length of the second heat dissipation member (332) close to the top cover (11).

13. The pulping apparatus (100) according to claim 10, characterized in that The pulping device (100) further comprises a stirring paddle (40) for stirring the slurry, the stirring paddle (40) comprises a rotating shaft (41) and a plurality of stirring blades (42) arranged on the rotating shaft (41), the rotating shaft (41) extends in the axial direction of the circulating tank (10) in the containing cavity (101), the stirring blades (42) are located in the containing cavity (101), the extension direction of the stirring blades (42) intersects with the extension direction of the rotating shaft (41), and the plurality of stirring blades (42) are arranged in a spaced manner along the axial direction of the circulating tank (10).

14. The pulping apparatus (100) according to claim 13, characterized in that The distance between the end of the second heat dissipation member (332) away from the first heat dissipation member (331) and the rotating shaft (41) is greater than the distance between the second heat dissipation member (332) and the adjacent stirring blade (42).

15. The pulping apparatus (100) according to claim 1, characterized in that The dispersion structure (20) comprises a stator (21) and a rotor (22), the stator (21) comprises a stator disc (211) and at least one layer of stator blocking rings (212), the stator blocking rings (212) are arranged on the stator disc (211), and a stator groove (2121) is arranged on the stator blocking rings (212); the rotor (22) comprises a rotor disc (221) and at least one layer of rotor blocking rings (222), the rotor blocking rings (222) are arranged on the rotor disc (221), and a rotor groove (2221) is arranged on the rotor blocking rings (222); the rotor blocking rings (222) are located inside and / or outside the stator blocking rings (212); a flow inlet (201) is arranged on the stator disc (211); the stator groove (2121) on the outermost stator blocking ring (212) or the rotor groove (2221) on the outermost rotor blocking ring (222) is configured as a flow outlet (202); the slurry flows into the flow inlet (201) and flows out of the flow outlet (202).

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