Pulping equipment

Abstract

The invention provides pulping equipment. The pulping equipment comprises a circulating tank, a top cover, a dispersing structure and a heat dissipation structure. An accommodating cavity for accommodating slurry is formed in the circulating tank. The top cover is arranged at the top of the circulating tank. The dispersing structure is located in the containing cavity and arranged at the bottom of the circulating tank, and the dispersing structure is used for dispersing the slurry and enabling the slurry to circularly flow in the circulating tank. The heat dissipation structure is connected to the top cover, at least part of the heat dissipation structure is located in the containing cavity, and the heat dissipation structure is used for conducting heat dissipation on the slurry. Thus, the pulping equipment dissipates heat of the slurry close to the center of the circulation tank through the heat dissipation structure and dissipates heat of the slurry close to the inner wall of the circulation tank through the tank body of the circulation tank, so that the heat dissipation efficiency of the slurry is greatly improved, the slurry is jointly dissipated through the heat dissipation structure and the circulation tank, and the heat dissipation efficiency is improved. And the temperature consistency of the slurry is effectively improved, so that the quality of the slurry is improved.

Description

Technical Field

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

[0002] When the pulping equipment is stirring the slurry, the slurry temperature will rise, which is not good for the quality of the slurry. Traditional pulping equipment relies on the outer wall of the circulation tank to dissipate heat. The slurry near the center of the circulation tank cannot be dissipated in a timely and effective manner, resulting in low heat dissipation efficiency and uneven heat dissipation of the slurry. Summary of the invention

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

[0004] The present application provides a pulping device, which includes a circulation tank, a top cover, a dispersion structure and a heat dissipation structure. A receiving cavity for receiving slurry is provided in the circulation tank. The top cover is provided on the top of the circulation tank. The dispersion structure is located in the receiving cavity and is provided at the bottom of the circulation tank. The dispersion structure is used to disperse the slurry and circulate the slurry in the circulation tank. The heat dissipation structure is connected to the top cover, and the heat dissipation structure is at least partially located inside the receiving cavity and is used to dissipate the heat of the slurry.

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

[0006] In some embodiments, the heat dissipation structure is provided in plurality, and the plurality of heat dissipation structures are arranged at intervals along the circumferential direction of the circulation tank.

[0007] In some embodiments, a heat conduction channel is provided in the heat dissipation structure, a heat conduction medium is provided in the heat conduction channel, 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 conductive channel, the heat conductive channel is configured as a capillary tube, the heat pipe includes a first segment and a second segment connected to the first segment, the first segment is located in the accommodating cavity, and the second segment is located outside the circulation tank.

[0009] In some embodiments, the heat dissipation structure further includes fins disposed on the first segment and / or the second segment.

[0010] In some embodiments, the heat dissipation structure further includes a temperature control component, which is disposed outside the circulation tank and is used to control the temperature of the second segment.

[0011] In some embodiments, the heat dissipation structure includes a first tube portion and a second tube portion, and the heat conductive channel includes a first flow channel and a second flow channel. The first flow channel is opened inside the first tube portion, and the first tube portion is inserted into the second tube portion. The second flow channel is formed between the outer wall of the first tube portion and the inner wall of the second tube portion, and the end of the first tube portion is connected to the end of the second tube portion; or, the first tube portion is located outside the second tube portion, the first flow channel is opened inside the first tube portion, and the second flow channel is opened inside the second tube portion, and the end of the first tube portion is connected to the end of the second tube portion.

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

[0013] In some embodiments, the heat dissipation structure includes a first heat dissipation member and a second heat dissipation member, the first heat dissipation member is connected to the top cover and extends along a first direction in the accommodating cavity, the second heat dissipation member is connected to the first heat dissipation member and extends along a second direction in the accommodating cavity, the first direction intersects with the second direction, the second heat dissipation member is arranged in plurality, and the plurality of second heat dissipation members are arranged at intervals along the first direction.

[0014] In some embodiments, a heat conduction channel is disposed in the first heat dissipation member, a branch channel is disposed in the second heat dissipation member, the branch channel is connected to the heat conduction channel, and a heat conduction medium is disposed in the heat conduction channel and the branch channel.

[0015] In some embodiments, the distance between two adjacent second heat dissipation elements becomes smaller or equal in the direction from the top cover toward the bottom of the circulation tank, and / or the length of the second heat dissipation element near the bottom of the circulation tank is greater than or equal to the length of the second heat dissipation element near the top cover.

[0016] In some embodiments, the pulping equipment also includes a stirring paddle, which is used to stir the slurry. The stirring paddle includes a rotating shaft and a plurality of stirring blades arranged on the rotating shaft. The rotating shaft extends in the accommodating cavity along the axial direction of the circulation tank. The stirring blades are located in the accommodating cavity. The extension direction of the stirring blades intersects with the extension direction of the rotating shaft. The plurality of stirring blades are arranged at intervals along the axial direction of the circulation tank.

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

[0018] In some embodiments, the dispersed structure includes a stator and a rotor, the stator includes a stator disk and at least one layer of stator retaining rings, the stator retaining rings are arranged on the stator disk, and stator slots are opened on the stator retaining rings; the rotor includes a rotor disk and at least one layer of rotor retaining rings, the rotor retaining rings are arranged on the rotor disk, and rotor slots are opened on the rotor retaining rings, the rotor retaining rings are located on the inner side and / or outer side of the stator retaining rings, the stator disk is opened with an inlet, the stator slots on the outermost stator retaining rings or the rotor slots on the outermost rotor retaining rings are configured as outflow outlets, the slurry flows in from the inflow inlet and flows out from the outflow outlet.

[0019] In the pulping equipment provided in the present application, on the one hand, the pulping equipment dissipates heat to the slurry near the center of the circulation tank through the heat dissipation structure, and dissipates heat to the slurry near the inner wall of the circulation tank through the tank body of the circulation tank, thereby greatly improving the heat dissipation efficiency of the slurry, and the heat dissipation of the slurry by the heat dissipation structure and the circulation tank effectively improves the temperature consistency of the slurry, thereby improving the quality of the slurry; on the other hand, based on the arrangement of a dispersion structure in the accommodating cavity, the slurry is dispersed and circulated inside the circulation tank through the dispersion structure, which can simplify the structure of the pulping equipment, make the structure of the pulping equipment more compact, and do not need to arrange additional pipelines, thereby greatly reducing the difficulty of cleaning the pulping equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0021] Figure 1 It is a cross-sectional view of the pulping equipment provided in the embodiment of the present application.

[0022] Figure 2 It is a cross-sectional view of the dispersed structure provided in the embodiment of the present application.

[0023] Figure 3 It is a schematic diagram of the structure of the stator and rotor provided in the embodiment of the present application.

[0024] Figure 4 It is a cross-sectional view of the heat dissipation structure provided in an embodiment of the present application.

[0025] Figure 5 It is a side view of the heat dissipation structure provided in an embodiment of the present application.

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

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

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

[0029] Fig. 9 It is a cross-sectional view of a heat dissipation structure provided in some other embodiments of the present application.

[0030] Fig.10 It is a partial cross-sectional view of a stirring paddle provided in some embodiments of the present application.

[0031] Description of main reference numerals: pulping equipment 100; circulation tank 10; accommodating chamber 101; top 102; bottom 103; top cover 11; side wall 12; bottom wall 13; discharge port 131; central axis C1; dispersion structure 20; inlet 201; outlet 202; stator 21; stator disk 211; stator retaining ring 212; stator slot 2121; rotor 22; rotor disk 221; rotor retaining ring 222; rotor slot 2221; pusher blade 223; mounting seat 224; first seat body 2241; second seat body 2242; connecting piece 2243; connecting hole 2244; driving shaft 23; driver 24; drainage cover 25; heat dissipation structure 30; first segment 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 sink 331; heat conduction channel 3311; second heat sink 332; inclined surface 3322; flow guide structure 3324; stirring paddle 40; rotating shaft 41; flow guide groove 411; flow guide sleeve 412; cooling flow channel 413; stirring blade 42; scraping blade 43; first paddle part 431; first paddle section 4311; second paddle section 4312; second paddle part 432; scraping element 44; heat dissipation jacket 50; first distance D1; second distance D2.

[0032] The following specific implementation methods will further illustrate the present application in conjunction with the above-mentioned drawings. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments in the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0034] Reference to "embodiment" or "implementation" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiment or implementation may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0035] It should be noted that the terms in the specification and claims of this application and the above-mentioned drawings are only for describing specific embodiments and are not intended to limit this application. The terms "first", "second", etc. in the specification and claims of this application and the above-mentioned drawings are used to distinguish different objects rather than to describe a specific order. The term "and / or" used in this application refers to any combination of one or more of the associated listed items and all possible combinations, and includes these combinations.

[0036] See also Figure 1 , Figure 1 : is a cross-sectional view of a pulping device 100 provided in an embodiment of the present application. The pulping device 100 includes a circulation tank 10, a top cover 11, a dispersion structure 20 and a heat dissipation structure 30. A receiving chamber 101 for receiving slurry is provided in the circulation tank 10. The circulation tank 10 includes a top 102 and a bottom 103 which are arranged opposite to each other along a central axis C1. After the pulping device 100 is installed, the top 102 of the circulation tank 10 is located on the side of the bottom 103 away from the ground. The top cover 11 is arranged at the top 102 of the circulation tank 10. The dispersion structure 20 is located in the receiving chamber 101 and is arranged at the bottom 103 of the circulation tank 10. The dispersion structure 20 is used to disperse the slurry and circulate the slurry in the circulation 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 receiving chamber 101 and is used to dissipate the heat of the slurry in the receiving chamber 101. The heat dissipation structure 30 can be fixedly connected to the top cover 11. In some embodiments, the heat dissipation structure 30 is detachably connected to the top cover 11 to facilitate maintenance of the heat dissipation structure 30. In some embodiments, the heat dissipation structure 30 may also be non-detachably connected to the top cover 11. For example, the heat dissipation structure 30 is welded to the top cover 11.

[0037] When the dispersion structure 20 disperses and circulates the slurry, the frictional heat between the slurry and the dispersion structure 20, between the slurry and the circulation tank 10, and the internal frictional heat when the slurry flows will cause the temperature of the slurry to rise, which will have a negative impact on the quality of the slurry. In the pulping equipment 100 of the embodiment of the present application, on the one hand, the pulping equipment 100 dissipates heat to the slurry near the center of the circulation tank 10 through the heat dissipation structure 30, and dissipates heat to the slurry near the inner wall of the circulation tank 10 through the tank body of the circulation tank 10, thereby greatly improving the heat dissipation efficiency of the slurry, and the heat dissipation of the slurry by the heat dissipation structure 30 and the circulation tank 10 effectively improves the temperature consistency of the slurry, thereby improving the quality of the slurry; on the other hand, compared with the traditional pulping equipment in which the dispersion structure is arranged outside the circulation tank and connected to the circulation tank through a pipeline, the pulping equipment 100 in the embodiment of the present application is based on the dispersion structure 20 arranged in the accommodating cavity 101, and the slurry is dispersed and circulated inside the circulation tank 10 through the dispersion structure 20, which can simplify the structure of the pulping equipment 100, make the structure of the pulping equipment 100 more compact, and do not need to arrange additional pipelines, greatly reducing the difficulty of cleaning the pulping equipment 100.

[0038] The circulation 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 enclose a containing chamber 101. The dispersion structure 20 is used to suck the slurry along the axial direction of the circulation tank 10 and discharge the slurry along the radial direction of the circulation tank 10. The slurry flows in the circulation tank 10 from the central axis C1 of the circulation tank 10 along the bottom wall 13 toward the side wall 12, flows upward from the bottom 103 to the top 102 along the side wall 12, and flows downward from the top 102 to the bottom 103 in the central axis C1 of the circulation tank 10 and its vicinity, thereby forming a circulating flow in the circulation tank 10. Exemplarily, the side wall 12 and the bottom wall 13 are connected in an arc, and the side wall 12 and the bottom wall 13 are connected smoothly, which is conducive to reducing the flow velocity 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 circulation tank 10. In some embodiments, the bottom wall 13 can be bent toward the top 102 to guide the slurry and reduce the flow rate loss of the slurry. In some embodiments, a discharge port 131 is provided on the bottom wall 13, and the discharge port is connected to the accommodating chamber 101. The discharge port 131 is arranged near the position of the dispersion structure 20 to increase the discharge speed of the slurry from the discharge port 131 and improve the discharge efficiency. Among them, the axial direction of the circulation tank 10 is parallel to the central axis C1, the radial direction of the circulation tank 10 is perpendicular to the central axis C1, and the circumferential direction of the circulation tank 10 is perpendicular to the central axis C1 and surrounds the central axis C1.

[0039] Please also read Figure 1 , Figure 2 and Figure 3, the dispersed structure 20 includes a stator 21 and a rotor 22. The stator 21 includes a stator disk 211 and at least one layer of stator retaining rings 212. The stator retaining ring 212 is arranged on the stator disk 211. A stator slot 2121 is provided on the stator retaining ring 212. The rotor 22 includes a rotor disk 221 and at least one layer of rotor retaining rings 222. The rotor retaining ring 222 is arranged on the rotor disk 221. A rotor slot 2221 is provided on the rotor retaining ring 222. The rotor retaining ring 222 is located on the inner side and / or outer side of the stator retaining ring 212. An inlet 201 is provided on the stator disk 211. The stator slot 2121 on the stator retaining ring 212 located on the outermost layer or the rotor slot 2221 on the rotor retaining ring 222 located on the outermost layer is configured as an inlet 202. At least one of the stator retaining ring 212 and the rotor retaining ring 222 is provided in multiple layers. For example, the rotor retaining ring 222 is provided as one layer, the stator retaining ring 212 is provided as two layers, and the rotor retaining ring 222 is located between the two layers of stator retaining rings 212. The stator slot 2121 on the outermost stator retaining ring 212 is configured as the outflow port 202. The slurry flows in from the inflow port 201 and flows out from the outflow port 202. Among them, the stator 21 is fixedly provided relative to the circulation tank 10, and the rotor 22 is rotatable relative to the circulation tank 10. When the rotor 22 rotates, the slurry generates negative pressure near the rotor retaining ring 222, so that the slurry flows from the inflow port 201 into the interior of the dispersion structure 20, and the slurry is thrown out from the outflow port 202 through the centrifugal action of the rotor retaining ring 222 on the slurry. When the slurry flows through the rotor slot 2221 on the rotor retaining ring 222 and the stator slot 2121 on the stator retaining ring 212, the rotor retaining ring 222 and the stator retaining ring 212 shear and disperse the slurry.

[0040] The rotor 22 also includes a pusher blade 223 fixedly connected to the rotor disk 221. The pusher blade 223 and the rotor disk 221 can be fixedly connected together by welding, screwing, clamping, etc., or the pusher blade 223 can also be integrally formed with the rotor disk 221. The pusher blade 223 is extended in a spiral shape. Along the axial direction of the circulation tank 10, the pusher blade 223 is roughly conical. The pusher blade 223 can be a clockwise spiral or a counterclockwise spiral. When the rotor 22 rotates, the pusher blade 223 is used to push the slurry to flow along the axial direction and radial direction of the circulation tank 10, so that the slurry flows from the inlet 201 into the dispersion structure 20.

[0041] The dispersed structure 20 also includes a mounting seat 224. The mounting seat 224 includes a first seat body 2241, a second seat body 2242 and a connecting member 2243. The first seat body 2241 is fixedly connected to the circulation tank 10. The second seat body 2242 is located on a side of the first seat body 2241 away from the bottom wall 13 of the circulation tank 10. The connecting member 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 member 2243 are fixedly connected together. For example, the first seat body 2241, the second seat body 2242 and the connecting member 2243 can be fixedly connected together by screws or bolts. Exemplarily, a screw through hole is provided on the second seat body 2242, the connecting piece 2243 is hollow, a threaded hole is provided on the first seat body 2241, a screw is passed through 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 or clamping, or the first seat body 2241, the second seat body 2242 and the connecting piece 2243 can be integrally formed.

[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 to the first seat body 2241 and / or the second seat body 2242. Exemplarily, the stator 21 is fixedly connected to the second seat body 2242. The stator 21 and the second seat body 2242 can be fixedly connected together by welding, clamping, screwing, etc., or the stator 21 and the second seat body 2242 can be integrally formed.

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

[0044] The dispersed structure 20 further includes a drive shaft 23 and a driver 24. The driver 24 is in transmission connection with the drive shaft 23. The drive shaft 23 is fixedly connected with the rotor 22. The driver 24 is used to drive the drive shaft 23 to rotate, so that the drive shaft 23 drives the rotor 22 to rotate relative to the stator 21. A mounting hole is provided on the first seat body 2241, and the drive shaft 23 is inserted into the mounting hole. The driver 24 is arranged outside the circulation tank 10.

[0045] In some embodiments, the dispersion structure 20 further includes a drainage cover 25. The drainage cover 25 is disposed at the connecting hole 2244 and the inlet 201. The drainage cover 25 is fixedly connected to the side of the second seat body 2242 away from the first seat body 2241. The drainage cover 25 and the second seat body 2242 can be fixedly connected together by welding, clamping, screwing, etc., or the drainage cover 25 and the second seat body 2242 can also be integrally formed. The drainage cover 25 is arranged in an annular shape. The pusher blade 223 is penetrated in the drainage cover 25. The drainage cover 25 is used to limit and guide the slurry. When the pusher blade 223 pushes the slurry to move, the drainage cover 25 can reduce the loss of the slurry in the radial direction under the centrifugal action, so that the slurry is kept between the drainage cover 25 and the pusher blade 223, thereby improving the axial pushing effect of the pusher 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 circulation tank 10 to the second distance D2 between the heat dissipation structure 30 and the central axis C1 of the circulation tank 10 is 0.2-0.8. Among them, when the dispersion structure 20 drives the slurry to circulate, the flow velocity of the slurry near the side wall 12 of the circulation tank 10 is greater than the flow velocity of the slurry near the central axis C1 of the circulation tank 10. The heat dissipation structure 30 is arranged close to the side wall 12 of the circulation tank 10, which can make the flow velocity of the slurry at the surface of the heat dissipation structure 30 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, and this application does not make specific limitations. 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 spaced apart from the side wall 12 of the circulation tank 10 to prevent 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 and is not specifically limited in this 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 circulation tank 10, thereby increasing the contact area between the heat dissipation structure 30 and the slurry and improving the heat dissipation efficiency. Among them, the plurality of heat dissipation structures 30 can be arranged at equal intervals along the circumferential direction of the circulation tank 10, or can be arranged at unequal intervals. In some embodiments, the heat dissipation structure 30 can also be provided as one.

[0049] Please also read Figure 1 and Figure 4 , a heat conduction channel 3311 is provided in the heat dissipation structure 30. A heat conduction medium is provided in the heat conduction channel 3311, and the heat conduction medium circulates in the heat conduction channel 3311. A part of the heat dissipation structure 30 is located inside the circulation tank 10, and another part is located outside the circulation tank 10. When the heat conduction medium circulates in the heat conduction channel 3311, the heat inside the circulation tank 10 can be brought to the outside of the circulation tank 10.

[0050] The heat dissipation structure 30 includes 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 may be parallel to the axial direction of the circulation tank 10. In some embodiments, the first direction F1 may be arranged at an angle to the axial direction of the circulation tank 10. In some embodiments, the first heat dissipation member 331 may also be arranged in a curved manner. For example, the first heat dissipation member 331 may be arranged in a spiral shape along the axial and circumferential directions of the circulation tank 10. In some embodiments, the first heat dissipation member 331 may also be arranged to extend in a winding manner to increase the contact area between the first heat dissipation member 331 and the slurry. Among them, the distance between the heat dissipation structure 30 and the side wall 12 of the circulation tank 10 may refer to the distance between the first heat dissipation member 331 and the side wall 12 of the circulation tank 10. The distance between the heat dissipation structure 30 and the central axis C1 of the circulation tank 10 may refer to the distance between the first heat dissipation member 331 and the central axis C1 of the circulation tank 10.

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

[0052] In some embodiments, the heat dissipation structure 30 further includes 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 in the accommodating chamber 101. The first direction F1 and the second direction F2 are arranged to intersect. Exemplarily, the first direction F1 and the second direction F2 can be arranged vertically. The second direction F2 can be parallel to the radial direction of the circulation tank 10. In some embodiments, the first direction F1 and the second direction F2 can also be arranged at an acute angle or an obtuse angle. In some embodiments, the second direction F2 can be arranged at an angle to the radial direction of the circulation tank 10. For example, the second heat dissipation member 332 is inclined relative to the first heat dissipation member 331 toward the top 102 or the bottom 103 of the circulation tank 10, or toward the side wall 12 of the circulation tank 10. In some embodiments, the second heat dissipation member 332 is arranged to extend in a winding manner to increase the contact area between the second heat dissipation member 332 and the slurry.

[0053] The second heat sink 332 is provided in plurality, and the plurality of second heat sinks 332 are arranged at intervals along the first direction F1. The number of the second heat sink 332 can be specifically set according to actual needs, and is not specifically limited in the present application. For example, the number of the second heat sink 332 can be 2, 3, 4, 5, etc. Among them, when the dispersion structure 20 drives the slurry to circulate, the flow velocity of the slurry near the bottom 103 of the circulation tank 10 is greater than the flow velocity of the slurry near the top 102 of the circulation tank 10. The spacing between two adjacent second heat sinks 332 decreases or becomes equal from the top cover 11 toward the bottom 103 of the circulation tank 10, and / or the length of the second heat sink 332 near the bottom 103 of the circulation tank 10 is greater than or equal to the length of the second heat sink 332 near the top cover 11, so that the contact area between the second heat sink 332 and the high-flow slurry can be increased, thereby improving the heat dissipation efficiency. The length of the second heat sink 332 may refer to the distance between the free end of the second heat sink 332 and the first heat sink 331, or the extension length of the second heat sink 332. The extension length of the second heat sink 332 is greater than the width of the first heat sink 331 along the radial direction of the circulation tank 10.

[0054] In some embodiments, the distance between two adjacent second heat sinks 332 decreases from the top cover 11 toward the bottom 103 of the circulation tank 10. Among the plurality of second heat sinks 332, along the first direction F1, the distance between two adjacent second heat sinks 332 may decrease in an arithmetic progression, in a geometric ratio, or irregularly. In some embodiments, the distance between two adjacent second heat sinks 332 may also be set to be equal.

[0055] In some embodiments, the length of the second heat sink 332 near the bottom 103 of the circulation tank 10 is greater than the length of the second heat sink 332 near the top cover 11. In the first direction F1, the lengths of the plurality of second heat sinks 332 may be lengthened in an arithmetic progression, in a geometric ratio, or irregularly. In some embodiments, the plurality of second heat sinks 332 include at least two groups, each group includes at least two second heat sinks 332, the lengths of the second heat sinks 332 in each group are the same, and the length of a group of second heat sinks 332 near the bottom 103 is greater than the length of a group of second heat sinks 332 near the top cover 11.

[0056] In some embodiments, a branch channel is provided in the second heat sink 332. The branch channel is connected to the heat conduction channel 3311. A heat conduction medium is provided 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, so as to conduct the heat of the second heat sink 332 to the first heat sink 331, and conduct it to the outside of the circulation tank 10 through the first heat sink 331. Exemplarily, the number of branch channels can be set to one. In some embodiments, the number of branch channels can be set to multiple to improve the heat dissipation capacity of the second heat sink 332. Multiple branch channels are arranged at intervals, or multiple branch channels are interconnected and staggered.

[0057] The second heat sink 332 can be configured as a sheet structure. The thickness of the second heat sink 332 is less than the width. Among them, the cross section of the second heat sink 332 can be rectangular, elliptical, shuttle-shaped, etc. The width direction of the cross section of the second heat sink 332 is tilted relative to the positive projection of the first direction F1 on the plane where the cross section of the second heat sink 332 is located, that is, the width direction of the cross section of the second heat sink 332 is set at an angle to the first direction F1. The width direction of the cross section of the second heat sink 332 is the long side direction of the cross section. In this way, when the slurry collides with the second heat sink 332, the second heat sink 332 can guide the slurry so that the slurry flows toward the dispersion structure 20 to promote the circulation and dispersion of the slurry. Exemplarily, the cross section of the second heat sink 332 can extend in a straight line. In some embodiments, the cross section of the second heat sink 332 can also extend in an arc.

[0058] Please also read Figure 4 and Figure 5, an inclined surface 3322 is provided on the side of the second heat sink 332 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 along the axial direction of the circulation tank 10, so that the slurry flows toward the dispersion structure 20. On a plane perpendicular to the extension direction of the second heat sink 332, the cross section of the second heat sink 332 includes an inclined side edge close to the bottom 103 of the circulation tank 10, and the inclined side edge extends along the second direction F2 to form an inclined surface 3322. Among them, the width direction of the second heat sink 332 is the extension direction of the inclined side edge. An acute angle α is formed between the inclined side edge and the first direction F1. Exemplarily, the angle of the acute angle α can be 45°, so that the second heat sink 332 has a better flow conductivity for the slurry. In one embodiment, the angle of the acute angle α can also be 25°, 30°, 35°, 40°, 50°, 55°, 60°, 65°, etc., which is not specifically limited in this application.

[0059] In some embodiments, a guide hole is provided on the second heat sink 332. The guide hole is arranged through the second heat sink 332. It can be understood that when the slurry flows, due to the blocking effect of the second heat sink 332, the slurry will form a vortex area on the downstream side of the second heat sink 332 along the flow direction of the slurry. Exemplarily, the vortex area is located on the side of the second heat sink 332 facing away from the inclined surface 3322. The slurry is retained in the vortex area, the slurry flow rate in the vortex area is low, and the slurry is easy to adhere to the second heat sink 332, forming a dirt thermal resistance effect, thereby causing the heat dissipation capacity of the second heat sink 332 to decrease. The guide hole can make the slurry flow through the surface of the second heat sink 332, and part of the slurry flows through the guide hole to the downstream side of the second heat sink 332 along the flow direction of the slurry, thereby reducing the size of the vortex area, reducing the size of the pressure resistance caused by the slurry when flowing through the second heat sink 332, reducing the flow rate loss of the slurry, and the slurry flowing through the guide hole will take away the slurry retained in the vortex area in time, and reduce the slurry adhering to the second heat sink 332, reduce the dirt thermal resistance effect, and then improve the heat dissipation capacity of the second heat sink 332. In addition, the guide hole can also make the slurry form a diversion, thereby improving the stirring and mixing effect of the slurry. Among them, the aperture of the guide hole can be specifically set according to actual needs, and is not specifically limited in this application. In some embodiments, the branch channel can be arranged around the guide hole to improve the heat exchange efficiency of the second heat sink 332.

[0060] See also Figure 6In some embodiments, the heat dissipation structure 30 is provided with a flow guide structure 3324 along the side wall 12 of the circulation tank 10 in the circumferential direction. The flow guide structure 3324 is used to form turbulence 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 downstream side of the heat dissipation structure 30 in the flow direction of the slurry, reducing the size of the pressure resistance caused by the slurry when flowing through the heat dissipation structure 30, and thus reducing the flow rate loss of the slurry. In addition, the flow guide structure 3324 can also reduce the slurry adhering 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 guide structure 3324 can be configured as a guide groove and / or a guide protrusion on the heat dissipation structure 30. In some embodiments, the guide structure 3324 is configured as a guide protrusion protruding from the first heat dissipation member 331. The guide protrusion is provided in multiple numbers, and the multiple guide protrusions are arranged at intervals. In some embodiments, the guide structure 3324 is configured as a guide groove opened on the first heat dissipation member 331. The guide groove is provided in multiple numbers, and the multiple guide grooves are arranged at intervals. In some embodiments, the guide structure 3324 can also be configured as a plurality of guide grooves and a plurality of guide protrusions opened on the first heat dissipation member 331. The plurality of guide grooves and the plurality of guide protrusions are arranged at intervals respectively. In some embodiments, the guide structure 3324 can also be configured as a guide groove and / or a guide protrusion arranged on the second heat dissipation member 332.

[0062] Please also read Figure 1 , Figure 4 and Figure 7, illustratively, the heat dissipation structure 30 is configured as a heat pipe. A heat conduction channel 3311 is provided in the heat pipe. The heat conduction channel 3311 is configured as a capillary channel. Among them, the first heat dissipation member 331 can be configured as a heat pipe. The heat pipe includes a first segment 311 and a second segment 312 connected to the first segment 311. The first segment 311 is located in the accommodating chamber 101. The second segment 312 is located outside the circulation tank 10. When slurry is stored in the circulation tank 10, the first segment 311 is immersed in the slurry. The heat-conducting medium in the first segment 311 vaporizes after absorbing the heat of the slurry, and flows along the heat-conducting channel 3311 to the second segment 312, and the vaporized heat-conducting medium condenses into a liquid in the second segment 312. The heat-conducting medium condensed into a liquid will flow back to the first segment 311 along the capillary channel due to the capillary principle. The heat-conducting medium circulates back and forth between the first segment 311 and the second segment 312, thereby realizing heat dissipation of the slurry. In this way, the heat dissipation structure 30 can spontaneously drive the heat-conducting medium to circulate in the heat-conducting channel 3311 through the temperature difference between the slurry and the external environment, avoiding the need to set up an additional driving structure, thereby reducing the power consumption of the pulping device 100 and reducing the use cost of the pulping device 100. Exemplarily, the boiling point of the heat-conducting medium can be configured to be 25°C-45°C. For example, the boiling point of the heat-conducting medium can be 25°C, 26°C, 30°C, 35°C, 40°C, 45°C, and the like.

[0063] In some embodiments, the heat pipe further includes a third segment 313, which is connected between the first segment 311 and the second segment 312. The third segment 313 is at least partially located in the accommodating chamber 101. The third segment 313 is located above the slurry, or the third segment 313 can be partially immersed in the slurry. The third segment 313 is configured as an insulating segment, and the third segment 313 is used to reduce the heat exchange between the heat-conducting medium located in the third segment 313 and the outside. When the heat-conducting medium in the first segment 311 is vaporized and flows along the heat-conducting channel 3311, the third segment 313 is used to prevent the heat of the vaporized heat-conducting medium from being dissipated to the space between the top cover 11 and the slurry, so that the vaporized heat-conducting medium flows to the second segment 312, thereby conducting the heat of the slurry to the outside of the circulation tank 10.

[0064] In some embodiments, fins 314 are provided on the first segment 311 and / or the second segment 312 to increase the heat conduction area, thereby increasing the heat absorption capacity of the first segment 311 and / or increasing the heat dissipation capacity of the second segment 312. The fins 314 can be provided in a plurality, and the plurality of fins 314 are provided at intervals. The number of fins can be specifically set according to actual needs and is not specifically limited in this application. In some embodiments, the first segment 311 is provided with fins 314. In some embodiments, the second segment 312 is provided with fins 314. In some embodiments, the first segment 311 and the second segment 312 are respectively provided with fins 314.

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

[0066] In some embodiments, the heat dissipation structure 30 further includes a protective sleeve 316. The protective sleeve 316 is hollow, and the heat pipe is disposed inside the protective sleeve 316. The protective sleeve 316 is used to protect the heat pipe, prevent the slurry from contacting the heat pipe, prevent the slurry from corroding the heat pipe, and prevent the heat pipe from contaminating the slurry. The second heat dissipation member 332 is connected to the protective sleeve 316.

[0067] See also Figure 8 In some embodiments, the heat dissipation structure 30 includes a first tube portion 321 and a second tube portion 322. The first heat dissipation member 331 can be configured as a first tube portion 321 and a second tube portion 322. The heat conduction channel 3311 includes a first flow channel 3211 and a second flow channel 3221. The first tube portion 321 is provided with a first flow channel 3211. The first tube portion 321 is arranged inside the second tube portion 322. The second flow channel 3221 is formed between the outer wall of the first tube portion 321 and the inner wall of the second tube portion 322. The end of the first tube portion 321 is connected to the end of the second tube portion 322, so that the first flow channel 3211 is connected to the second flow channel 3221. The end of the second tube portion 322 located in the accommodating chamber 101 is closed. The heat conduction medium circulates between the first flow channel 3211 and the second flow channel 3221. One end of the second tube portion 322 extends into the circulation tank 10, and the other end extends to the outside of the circulation tank 10. One end of the first pipe portion 321 extends into the circulation tank 10, and the other end extends to the outside of the circulation tank 10. After absorbing the heat of the slurry, the heat-conducting medium in the second flow channel 3221 flows to the outside of the circulation tank 10 for heat dissipation, and the cooled heat-conducting medium flows from the first flow channel 3211 into the circulation tank 10. In some embodiments, after absorbing the heat of the slurry, the heat-conducting medium in the second flow channel 3221 flows into the first flow channel 3211, and flows to the outside of the circulation tank 10 through the first flow channel 3211 for heat dissipation, and the cooled heat-conducting medium flows from the second flow channel 3221 into the circulation tank 10.

[0068] The cross-section of the first tube portion 321 may be in the shape of a circle, an ellipse, a polygon, etc. The cross-section of the second tube portion 322 may be in the shape of a circle, an ellipse, a polygon, etc. The cross-section of the first tube portion 321 may be the same as or different from the cross-section of the second tube portion 322. In some embodiments, fins may be provided on the second tube portion 322 to increase the heat exchange efficiency between the second tube 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 circulation tank 10 is greater than the diameter of the second pipe portion 322 at a position close to the top 102 of the circulation tank 10, so as to increase the content of the heat-conducting medium in the second pipe portion 322 at a position close to the bottom 103 of the circulation tank 10, thereby improving the heat dissipation effect of the slurry close to the bottom 103 of the circulation tank 10 and improving the uniformity of the internal temperature of the slurry.

[0070] See also Fig. 9 In some embodiments, the first pipe part 321 is located outside the second pipe part 322. A first flow channel 3211 is provided in the first pipe part 321. A second flow channel 3221 is provided in the second pipe part 322. The end of the first pipe part 321 is connected to the end of the second pipe part 322. For example, the first pipe part 321 and the second pipe part 322 can be connected to form a U-shaped structure. In some embodiments, the first pipe part 321 and the second pipe part 322 can also be connected to form a V-shaped, wavy, etc. structure, which is not specifically limited in this application. Among them, the second heat sink 332 can be connected to the first pipe part 321 and / or the second pipe part 322. In some embodiments, the extension length of the first pipe part 321 in the circulation tank 10 is greater than the extension length of the second pipe part 322 in the circulation tank 10, so that the heat-conducting medium in the first pipe part 321 can quickly flow out from the second pipe part 322 to the outside of the circulation tank 10 for heat dissipation after absorbing the slurry. The first pipe portion 321 may extend in a straight line, an arc, a serpentine shape, etc. in the circulation tank 10 . The second pipe portion 322 may extend in a straight line, an arc, a serpentine shape, etc. in the circulation tank 10 .

[0071] In some embodiments, the heat dissipation structure 30 further includes a pumping member. The pumping member is located outside the circulation 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 that the heat-conducting medium circulates 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. By adjusting the circulation speed of the heat-conducting medium, the heat dissipation efficiency of the heat dissipation structure 30 can be adjusted to meet the heat dissipation requirements of the slurry at different dispersion stages, improve the adjustment accuracy of the temperature 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 lower 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 heated by the slurry in the second flow channel and vaporizes, and flows along the second flow channel 3221 to the pumping member. The pumping member compresses the vaporized heat-conducting medium, so that the heat-conducting medium releases heat and liquefies, and pumps the liquefied heat-conducting medium into the first flow channel 3211.

[0073] See also Figure 1 In some embodiments, the pulping equipment 100 further includes a stirring paddle 40. The stirring paddle 40 includes a rotating shaft 41 and a plurality of stirring blades 42. The rotating shaft 41 extends in the axial direction of the circulation tank 10. The plurality of stirring blades 42 are respectively connected to the rotating shaft 41 and are arranged at intervals along 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 at intervals along the circumferential direction of the rotating shaft 41. Exemplarily, the plurality of stirring blades 42 can be divided into a plurality of groups, and the plurality of groups of stirring blades 42 are arranged at intervals along the circumferential direction of the rotating shaft 41, each group includes a plurality of stirring blades 42, and the plurality of stirring blades 42 in each group are arranged at intervals along the extension direction of the rotating shaft 41. Among them, the number of stirring blades 42 can be specifically set according to actual needs, and is not specifically limited in this application. For example, the number of stirring blades 42 can be 6, 9, 12, etc.

[0074] The extension direction of the stirring blade 42 intersects with the extension direction of the rotating shaft 41. Exemplarily, the stirring blade 42 is extended along the radial direction of the rotating shaft 41. In some embodiments, the extension direction of the stirring blade 42 is at an acute angle to the axial direction of the rotating shaft 41. The stirring blade 42 is inclined toward the bottom 103 or the top 102 of the circulation tank 10. In some embodiments, the stirring blade 42 can also extend in a curved shape. When the rotating shaft 41 drives the stirring blade 42 to rotate, the stirring blade 42 cuts the slurry, thereby reducing the rotational resistance of the stirring paddle 40. In some embodiments, the stirring blade 42 is extended in a winding shape.

[0075] Along the axial direction of the circulation tank 10, multiple stirring blades 42 and multiple second heat sinks 332 are staggered. When the rotating shaft 41 drives the stirring blades 42 to rotate, the stirring blades 42 meet the second heat sink 332 and shear the slurry, thereby improving the mixing uniformity of the slurry. In some embodiments, the multiple stirring blades 42 are arranged in a spiral shape along the axial direction of the rotating shaft 41. When the rotating shaft 41 drives the stirring blades 42 to rotate, the multiple stirring blades 42 meet the second heat sink 332 in turn, avoiding the concentrated encounter of the multiple stirring blades 42 and the multiple second heat sinks 332, thereby avoiding the concentrated shearing of the slurry by the multiple stirring blades 42 and the multiple second heat sinks 332, reducing the reaction force of the slurry on the stirring blades 42, and reducing the rotation 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 are arranged in a spiral shape, which can drive the slurry to flow along the axial direction of the rotating shaft 41, thereby driving the slurry to move toward the dispersion structure 20, thereby improving the circulation efficiency of the slurry in the circulation 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 to reduce the difficulty of installing the stirring blades 42.

[0076] The stirring blade 42 can be constructed as a sheet structure. The thickness of the stirring blade 42 is less than the width. Among them, the cross-section of the stirring blade 42 can be rectangular, elliptical, shuttle-shaped, etc. The width direction of the cross-section of the stirring blade 42 is inclined relative to the orthographic projection of the axial direction of the rotating shaft 41 on the plane where the cross-section of the stirring blade 42 is located, that is, the width direction of the cross-section of the stirring blade 42 is set at an angle to 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 collides with the stirring blade 42, the stirring blade 42 can push the slurry to flow in the direction of the dispersion structure 20 to promote the circulation and dispersion of the slurry.

[0077] The inclination direction of the stirring blade 42 corresponds to the rotation direction of the stirring paddle 40. In some embodiments, from the direction of the top 102 of the self-circulation tank 10 toward the bottom 103, when the stirring paddle 40 rotates clockwise, the stirring blade 42 is tilted in a left-handed direction. From the direction of the top 102 of the self-circulation tank 10 toward the bottom 103, along the clockwise direction of the rotating shaft 41, the stirring blade 42 is tilted toward the top 102 of the circulation tank 10. In some embodiments, from the direction of the top 102 of the self-circulation tank 10 toward the bottom 103, when the stirring paddle 40 rotates counterclockwise, the stirring blade 42 is tilted in a right-handed direction. From the direction of the top 102 of the self-circulation tank 10 toward the bottom 103, along the counterclockwise direction of the rotating shaft 41, the stirring blade 42 is tilted toward the top 102 of the circulation tank 10.

[0078] The inclination direction of the second heat sink 332 corresponds to the rotation direction of the stirring paddle 40. In some embodiments, from the top 102 of the circulation tank 10 toward the bottom 103, when the stirring paddle 40 rotates clockwise, the second heat sink 332 is inclined in a left-handed direction. Along the clockwise direction of the first heat sink 331, the second heat sink 332 is inclined toward the top 102 of the circulation tank 10. In some embodiments, from the top 102 of the circulation tank 10 toward the bottom 103, when the stirring paddle 40 rotates counterclockwise, the second heat sink 332 is inclined in a right-handed direction. From the top 102 of the circulation tank 10 toward the bottom 103, along the counterclockwise direction of the first heat sink 331, the second heat sink 332 is inclined toward the top 102 of the circulation tank 10. Among them, the inclination direction of the stirring blade 42 is the same as the inclination direction of the second heat sink 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 sink 332, which is conducive to the slurry flowing toward the dispersion structure 20, thereby improving the circulation efficiency of the slurry.

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

[0080] The distance between the end of the second heat sink 332 away from the first heat sink 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 sink 331. The distance between the end of the second heat sink 332 away from the first heat sink 331 and the rotating shaft 41 can be specifically set according to actual needs, and is not specifically limited in this application. The distance between the second heat sink 332 and the adjacent stirring blade 42 can be specifically set according to actual needs, and is not specifically limited in this 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, a through hole is provided on the stirring blade 42. It is understandable that when the slurry flows, due to the blocking effect of the stirring blade 42, the slurry will form a vortex area on the side downstream of the stirring blade 42 along the flow direction of the slurry, that is, the stirring blade 42 will form a vortex area on the side of the top 102 of the circulation tank 10. The through hole can make the slurry flow through the surface of the stirring blade 42, and part of the slurry flows through the through hole to the side downstream of the stirring blade 42 along the flow direction of the slurry, thereby reducing the size of the vortex area, reducing the size of the pressure resistance caused by the slurry when flowing through the stirring blade 42, reducing the flow rate loss of the slurry, and reducing or avoiding the jitter 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 make the slurry form a diversion, thereby improving the stirring and mixing effect of the slurry. The diameter of the through hole can be set according to actual needs and is not specifically limited in this application.

[0083] In some embodiments, the stirring paddle 40 further includes a scraping blade 43. The scraping blade 43 is connected to the rotating shaft 41 and is used to scrape off the slurry adhering to the inner wall of the circulation tank 10 to promote the circulation of the slurry and improve the dispersion effect of the slurry. The scraping blade 43 is driven to rotate when the rotating shaft 41 rotates. The scraping blade 43 is spaced apart from the stirring blade 42 to avoid interference with the stirring blade 42. Multiple scraping blades 43 can be provided, and multiple scraping blades 43 are spaced apart along the circumference of the rotating shaft 41 to improve the scraping effect on the slurry.

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

[0085] The first paddle part 431 is used to scrape off the slurry adhering to the bottom wall 13. The second paddle part 432 is disposed close to the side wall 12 of the circulation tank 10.

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

[0087] Exemplarily, on the projection plane perpendicular to the central axis C1 of the circulation 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 circulation tank 10. In some embodiments, on the projection plane perpendicular to the central axis C1 of the circulation 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 effect on the slurry, thereby reducing the resistance of the slurry to the first paddle portion 431. In some embodiments, along the axial direction of the circulation tank 10, the second paddle portion 432 is arranged in a spiral shape. 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 effect on the slurry, thereby reducing the resistance of the slurry to the second paddle portion 432. In some embodiments, the first paddle portion 431 and the second paddle portion 432 are arranged in a spiral shape to reduce the resistance of the stirring paddle 40 when it rotates.

[0088] The first paddle portion 431 includes 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 circulation tank 10. The first paddle segment 4311 is tilted relative to the rotating shaft 41 toward the bottom wall 13 of the circulation tank 10. The first paddle segment 4311 of the plurality of wall-scraping blades 43 forms an avoidance space with the bottom wall 13 when rotating, and the dispersion structure 20 is located in the avoidance space, thereby avoiding interference between the wall-scraping blades 43 and the dispersion structure 20. The second paddle segment 4312 is connected to one 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 circulation tank 10. The second paddle segment 4312 is arranged close to the bottom wall 13 of the circulation tank 10. The second paddle segment 4312 is spaced apart from the dispersion structure 20 to reduce the blocking effect of the second paddle segment 4312 on the slurry discharged from the dispersion structure 20, reduce the velocity loss of the slurry, and improve the circulation capacity of the slurry in the circulation 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 disposed close to the dispersion structure 20 and is used to scrape off the slurry adhering to the side of the dispersion structure 20 away from the bottom wall 13 of the circulation tank 10.

[0089] In some embodiments, the stirring paddle 40 also includes a scraping member 44. The scraping member 44 is disposed on the scraping blade 43. The scraping member 44 is used to abut against the inner wall of the circulation tank 10 and / or to abut against the dispersion structure 20 to scrape off the slurry. There are multiple scraping members 44. The scraping members 44 on different scraping blades 43 are arranged at different positions. When the stirring paddle 40 rotates, the scraping working surface formed by the scraping member 44 on the scraping blade 43 covers the side wall 12, the bottom wall 13 of the circulation tank 10 and the surface of one side of the dispersion structure 20 away from the bottom wall 13 of the circulation tank 10. In this way, when the stirring paddle 40 rotates, the scraping members 44 on different scraping blades 43 can scrape the slurry at different positions, thereby reducing the reaction force of the slurry borne by a single scraping blade 43 and avoiding the problem of bending or breaking of the scraping blade 43.

[0090] In some embodiments, the rotating shaft 41 may include a first shaft and a second shaft. The first shaft is hollow, and the second shaft is inserted into the first shaft. The stirring blade 42 is connected to the first shaft. The scraping blade 43 is connected to the second shaft. The first shaft and the second shaft can rotate independently of each other to achieve that the stirring blade 42 and the scraping blade 43 rotate at different speeds. In some embodiments, the rotating shaft 41 can also be configured as a single shaft body, and the stirring blade 42 and the scraping blade 43 are both connected to the rotating shaft 41, and the rotating shaft 41 drives the stirring blade 42 and the scraping blade 43 to rotate synchronously.

[0091] Please also read Figure 1 and Fig.10 In some embodiments, a guide groove 411 is provided in the rotating shaft 41. A guide sleeve 412 is provided in the guide groove 411. The guide sleeve 412 and the side wall of the guide groove 411 are spaced to form a cooling channel 413. A cooling medium is provided in the cooling channel 413. The cooling medium is used to cool the rotating shaft 41, so that the rotating shaft 41 cools the slurry. The cooling medium can be a liquid or a gas. For example, the cooling medium can be water, oil, etc. After absorbing the heat of the slurry, the cooling medium in the cooling channel 413 flows to the outside of the circulation tank 10 to dissipate heat, and the cooled cooling medium flows from the guide sleeve 412 into the circulation tank 10.

[0092] The guide sleeve 412 is rotatable or fixed relative to the rotating shaft 41. Exemplarily, the guide sleeve 412 is arranged on the top cover 11 and is rotatable relative to the rotating shaft 41. In this way, when the rotating shaft 41 rotates, the guide sleeve 412 is fixed relative to the top cover 11, which is conducive to simplifying the assembly of the guide sleeve 412. Among them, the guide sleeve 412 and the top cover 11 are detachably fixedly connected together, so as to facilitate the assembly and replacement of the guide sleeve 412. In some embodiments, the guide sleeve 412 can be rotatably connected to the top cover 11.

[0093] In some embodiments, the pulping equipment 100 further includes a temperature measuring member. The temperature measuring member is used to measure the temperature of the slurry. The temperature measuring member is connected to the top cover 11 and at least partially extends into the accommodating chamber 101. The end of the temperature measuring member is immersed in the slurry. In some of the described methods, 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 slurry to the distance between the liquid surface of the slurry and the bottom wall 13 is greater than 0.2. Exemplarily, the ratio of the distance between the end of the temperature measuring member and the liquid surface of the slurry to the distance between the liquid surface of the slurry and the bottom wall 13 can be 0.2, 0.3, 0.4, 0.5, 0.6, 0.7, etc. Among them, the liquid level of the slurry can be the liquid level formed when the slurry contained in the circulation tank 10 is within the rated capacity range of the circulation tank 10. The distance between the liquid surface of the slurry and the bottom wall 13 of the circulation tank 10 refers to the distance between the position of the bottom wall 13 close to the dispersion structure 20 and the liquid surface along the axial direction of the circulation tank 10 when the slurry in the circulation tank 10 is in a stationary state. In some embodiments, the temperature measuring element can also be connected to the stirring paddle 40, or to the side wall 12 of the circulation tank 10.

[0094] In some embodiments, a heat dissipation jacket 50 is provided on the circulation tank 10. The heat dissipation jacket 50 wraps the side wall 12 and / or the bottom wall 13. The heat dissipation jacket 50 is used to pass a cooling medium to cool the side wall 12 and / or the bottom wall 13 through the cooling medium, thereby dissipating heat from the slurry through the side wall 12 and / or the bottom wall 13.

[0095] In some embodiments, the pulping device 100 further includes a feeding structure. A feeding port is provided on the top cover 11. The feeding structure is connected to the feeding port. The feeding structure is used to feed solid materials into the circulation tank 10. The feeding structure can be configured as a twin-screw feeding mechanism.

[0096] In some embodiments, the pulping equipment 100 further includes a liquid inlet structure. A liquid inlet is provided on the top cover 11. The liquid inlet structure includes a liquid inlet pipe. The liquid inlet pipe is inserted into the liquid inlet and extends into the accommodating chamber 101. The opening of the liquid inlet pipe in the accommodating chamber 101 is arranged toward the side wall 12 of the circulation tank 10, so that when the liquid inlet pipe transports liquid material into the circulation tank 10, the liquid material will flow down along the side wall 12, thereby reducing the impact force of the liquid material on the liquid surface, reducing or avoiding the splashing of the liquid material, and avoiding the mixing of gas into the liquid material.

[0097] The above are only specific implementations of the present application, but the protection scope of the present application is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present application, and these modifications or replacements should be included in the protection scope of the present application. Therefore, the protection scope of the present application shall be based on the protection scope of the claims.

Claims

1. A pulping device (100), characterized in that: include: A circulation tank (10), wherein a containing chamber (101) for containing slurry is provided in the circulation tank (10); A top cover (11) is arranged on the top (102) of the circulation tank (10); a dispersion structure (20), located in the containing chamber (101) and arranged at the bottom (103) of the circulation tank (10), the dispersion structure (20) being used to disperse the slurry and allow the slurry to circulate in the circulation tank (10); A heat dissipation structure (30) is connected to the top cover (11); the heat dissipation structure (30) is at least partially located inside the accommodating cavity (101) and is used to dissipate heat from the slurry.

2. The pulping device (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 circulation tank (10) to a second distance (D2) between the heat dissipation structure (30) and the central axis (C1) of the circulation tank (10) is 0.2-0.

8.

3. The pulping device (100) according to claim 1, characterized in that: The heat dissipation structure (30) is provided in plurality, and the plurality of heat dissipation structures (30) are arranged at intervals along the circumferential direction of the circulation tank (10).

4. The pulping device (100) according to claim 1, characterized in that: A heat conduction channel (3311) is provided in the heat dissipation structure (30), a heat conduction medium is provided in the heat conduction channel (3311), and the heat conduction medium circulates in the heat conduction channel (3311).

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

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

7. The pulping device (100) according to claim 5, characterized in that: The heat dissipation structure (30) further comprises a temperature control component (315), wherein the temperature control component (315) is arranged outside the circulation tank (10) and is used to control the temperature of the second segment (312).

8. The pulping device (100) according to claim 4, characterized in that: The heat dissipation structure (30) comprises a first tube portion (321) and a second tube portion (322); the heat conduction channel (3311) comprises a first flow channel (3211) and a second flow channel (3221); the first tube portion (321) is provided with the first flow channel (3211) inside; the first tube portion (321) is inserted into the second tube portion (322); the second flow channel (3221) is formed between the outer wall of the first tube portion (321) and the inner wall of the second tube portion (322); the end of the first tube portion (321) is connected to the end of the second tube portion (322); or the first tube portion (321) is located outside the second tube portion (322); the first flow channel (3211) is provided inside the first tube portion (321); the second flow channel (3221) is provided inside the second tube portion (322); the end of the first tube portion (321) is connected to the end of the second tube portion (322).

9. The pulping device (100) according to claim 8, characterized in that: The heat dissipation structure (30) further comprises a pumping member, which is used to extract the heat-conducting medium from the second flow channel (3221) and pump the heat-conducting medium into the first flow channel (3211).

10. The pulping device (100) according to claim 1, characterized in that: The heat dissipation structure (30) comprises a first heat dissipation member (331) and a second heat dissipation member (332), wherein the first heat dissipation member (331) is connected to the top cover (11) and extends in the accommodating cavity (101) along a first direction (F1), and the second heat dissipation member (332) is connected to the first heat dissipation member (331) and extends in the accommodating cavity (101) along a second direction (F2), the first direction (F1) intersects with the second direction (F2), and a plurality of the second heat dissipation members (332) are provided, and the plurality of the second heat dissipation members (332) are arranged at intervals along the first direction (F1).

11. The pulping device (100) according to claim 10, characterized in that: The first heat sink (331) is provided with a heat conduction channel (3311), the second heat sink (332) is provided with a branch channel, the branch channel is connected to the heat conduction channel (3311), and heat conduction medium is provided in the heat conduction channel (3311) and the branch channel.

12. The pulping device (100) according to claim 10, characterized in that: The distance between two adjacent second heat sinks (332) becomes smaller or equal in the direction from the top cover (11) toward the bottom (103) of the circulation tank (10), and / or the length of the second heat sink (332) close to the bottom (103) of the circulation tank (10) is greater than or equal to the length of the second heat sink (332) close to the top cover (11).

13. The pulping device (100) according to claim 10, characterized in that: The pulping equipment (100) further comprises a stirring paddle (40), wherein the stirring paddle (40) is used to stir the slurry, and the stirring paddle (40) comprises a rotating shaft (41) and a plurality of stirring blades (42) arranged on the rotating shaft (41), wherein the rotating shaft (41) extends in the accommodating cavity (101) along the axial direction of the circulation tank (10), and the stirring blades (42) are located in the accommodating cavity (101), and 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 at intervals along the axial direction of the circulation tank (10).

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

15. The pulping device (100) according to claim 1, characterized in that: The dispersed structure (20) comprises a stator (21) and a rotor (22); the stator (21) comprises a stator disk (211) and at least one layer of stator retaining rings (212); the stator retaining rings (212) are arranged on the stator disk (211); and the stator retaining rings (212) are provided with stator slots (2121); the rotor (22) comprises a rotor disk (221) and at least one layer of rotor retaining rings (222); the rotor retaining rings (222) are arranged on the rotor disk (221); and the rotor retaining rings (222) are provided with stator slots (2121). A rotor groove (2221) is provided on the stator disc (22), the rotor retaining ring (222) is located on the inner side and / or the outer side of the stator retaining ring (212), an inlet (201) is provided on the stator disc (211), the stator groove (2121) located on the outermost stator retaining ring (212) or the rotor groove (2221) located on the outermost rotor retaining ring (222) is configured as an outflow outlet (202), and the slurry flows in from the inflow inlet (201) and flows out from the outflow outlet (202).

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