A dispersing apparatus for producing an insulation paper pulp

Abstract

The application relates to the technical field of insulation paper dispersion, and discloses a dispersion equipment for insulation paper pulp production, which comprises a tank body used for containing insulation paper pulp to be dispersed; a primary dispersion assembly arranged in the tank body and used for rotating and disturbing high-concentration high-flocculation paper pulp flowing into the tank body so as to reduce the paper pulp concentration and break large flocculation bodies; and a secondary dispersion assembly arranged in the tank body and located downstream of the primary dispersion assembly and used for applying shearing action to the paper pulp dispersed by the primary dispersion assembly so as to depolymerize fiber flocculation bodies in the paper pulp. The dispersion equipment for insulation paper pulp production aims to solve the problems that the existing disc mill has a narrow applicable concentration range due to the limitation of the mill disc type, the dispersion effect of the paper pulp with too heavy flocculation is poor, and the paper pulp with different concentrations and different flocculation degrees cannot be efficiently and uniformly dispersed in industrialized production.

Description

TECHNICAL FIELD

[0001] The application relates to the field of paper pulp dispersion technology, and particularly relates to a dispersion device for insulating paper pulp production. BACKGROUND

[0002] As indispensable key insulating materials in electrical equipment, insulating papers are widely applied to core power equipment and electrical equipment such as transformers, high-voltage motors, capacitors and circuit breakers, and the performance of the insulating papers directly determines the insulating reliability, operation life and safety stability of the equipment. During the long-term operation of the equipment, the insulating papers need to withstand the synergistic effect of multiple complex working conditions such as electric field, temperature, mechanical stress and environmental humidity, and therefore, strict requirements are put forward for the comprehensive performance of the insulating papers.

[0003] In the prior art, a disc mill is usually used for dispersing the paper pulp, and the disc mill generates shearing force and vortex effect through the relative movement between the grinding discs to disperse the fibers in the paper pulp, so that the fibers are uniformly distributed in the pulp. However, there are many types of disc mills, and some of the disc mills adopt a circular grinding disc, which is more suitable for processing low-concentration paper pulp materials. Some other disc mills adopt a conical grinding disc, which is mainly used for processing high-concentration paper pulp materials. The two types of disc mills have obvious limitations in the applicable concentration range of the paper pulp. In addition, if the flocculation degree of the paper pulp is too high, it is difficult for the circular grinding disc or the conical grinding disc to generate sufficient force to break the serious fiber flocculation through the structural design and movement mode of the disc mill, so that the dispersion effect of the paper pulp cannot meet the design requirements, and the forming quality and performance stability of the subsequent insulating paper and other products are affected, which cannot meet the efficient and uniform dispersion requirements of paper pulp materials with different concentrations and different flocculation degrees in industrial production. SUMMARY

[0004] The application aims to solve the problems that the concentration range of the disc mill is narrow due to the limitation of the type of the grinding disc, and the dispersion effect of the paper pulp with too high flocculation degree is poor, and the efficient and uniform dispersion requirements of paper pulp materials with different concentrations and different flocculation degrees in industrial production cannot be met, and provides a dispersion device for insulating paper pulp production.

[0005] The technical scheme for solving the above technical problems is as follows:

[0006] A dispersion device for insulating paper pulp production, comprising:

[0007] A tank body is used for containing insulating paper pulp to be dispersed;

[0008] A primary dispersion assembly is arranged in the tank body and is used for rotating and disturbing the high-concentration and high-flocculation paper pulp flowing into the tank body, so as to reduce the concentration of the paper pulp and break the large flocculation body;

[0009] A secondary dispersion assembly is arranged inside the tank body downstream of the primary dispersion assembly and is used to apply shearing action to the primary dispersed pulp to depolymerize the fiber flocculation therein;

[0010] A deep dispersion assembly is arranged inside the tank body downstream of the secondary dispersion assembly and is used to apply extrusion action to the secondary dispersed pulp to further separate the flocculation fibers and achieve uniform distribution of the fibers;

[0011] A circulation assembly is arranged on the tank body and communicates with the inside of the tank body, is used to extract the pulp from the bottom area of the tank body, and can selectively deliver the extracted pulp to the input area of the primary dispersion assembly or the secondary dispersion assembly to promote the circulation flow of the pulp in the tank body and ensure the dispersion uniformity.

[0012] On the basis of the above technical solutions, the application can also be improved as follows.

[0013] Further, the primary dispersion assembly comprises:

[0014] An annular support frame is fixedly installed on the inner wall of the tank body and is used to provide support;

[0015] A filter screen is fixedly installed on the annular support frame and is used to allow the dispersed pulp to pass through and intercept the insufficiently dispersed flocculation;

[0016] A mounting base is fixedly installed on the inner wall of the tank body and is located axially upstream of the annular support frame and is used to provide rotational support;

[0017] A drive shaft is rotatably connected to the center of the mounting base;

[0018] A plurality of helical blades are fixedly arranged along the axial direction of the drive shaft, each of the helical blades is installed at an inclination relative to the drive shaft, and the installation inclination angles of the plurality of helical blades are different from each other, and is used to apply disturbance force and axial thrust to the inflowing high-concentration high-flocculation pulp when rotating to achieve preliminary dispersion and reduce the concentration.

[0019] Further, the secondary dispersion assembly comprises:

[0020] A first fixed grinding disc is fixedly installed on the inner wall of the tank body and is located axially downstream of the primary dispersion assembly, and the working surface of the first fixed grinding disc has an inner concave curved surface;

[0021] At least one through hole is formed in the first fixed grinding disc;

[0022] A rotating shaft is rotatably installed in the tank body;

[0023] a first moving grinding disc fixedly installed on the rotating shaft and oppositely arranged with the first fixed grinding disc, and a shearing gap formed between the working surfaces of the two discs for pulp passing through;

[0024] The primary dispersed pulp enters the shearing gap between the first fixed grinding disc and the first moving grinding disc through the through hole, and the rotating movement of the first moving grinding disc relative to the first fixed grinding disc applies shearing action to the pulp to depolymerize the fiber flocculation therein.

[0025] Further, the deep dispersion assembly comprises:

[0026] a second fixed grinding disc fixedly installed on the inner wall of the tank body and located axially downstream of the first moving grinding disc, and the working surface of the second fixed grinding disc having a horizontal surface facing the first moving grinding disc;

[0027] a discharge hole formed in the central region of the working surface of the second fixed grinding disc;

[0028] a second moving grinding disc fixedly installed on the rotating shaft and oppositely arranged with the second fixed grinding disc, and the working surface of the second moving grinding disc having a convex conical surface facing the second fixed grinding disc, so that the working surfaces of the second moving grinding disc and the second fixed grinding disc form an extrusion gap gradually decreasing from the edge to the center;

[0029] The secondarily dispersed pulp flows into the extrusion gap between the second fixed grinding disc and the second moving grinding disc, and the rotating movement of the second moving grinding disc relative to the second fixed grinding disc applies increasing extrusion action to the pulp to further separate the flocculation fibers and promote uniform distribution of the fibers, and the treated pulp is discharged to the bottom region of the tank body through the discharge hole.

[0030] Further, the circulation assembly comprises:

[0031] a pumping device arranged on the tank body and in fluid communication with the bottom region of the tank body for pumping the pulp in the bottom region of the tank body;

[0032] a flow direction control valve connected to the outlet end of the pumping device for controlling the flow direction of the pulp;

[0033] a first conveying pipeline connected to the first outlet of the flow direction control valve for conveying the pumped pulp to the input region of the secondary dispersion assembly;

[0034] A second conveying pipe is connected to the second outlet of the flow direction control valve, and is used to convey the extracted pulp to the input area of the primary dispersion assembly. Through the flow direction control valve, the extracted pulp can be selectively returned to the input area of the secondary dispersion assembly or the primary dispersion assembly through the first conveying pipe or the second conveying pipe, so as to promote the circulation of the pulp in the tank and ensure the uniformity of the dispersion.

[0035] Further, the pumping device is a reciprocating piston pumping member, which comprises:

[0036] A pump cavity is fixedly arranged outside the tank, and defines a pumping space inside. The inlet of the flow direction control valve is in fluid communication with the pumping space of the pump cavity.

[0037] A reciprocating screw is fixedly arranged at the end of the rotating shaft, and a threaded sleeve is threadedly connected to the outside of the reciprocating screw. The tank is further provided with a first driving member for driving the reciprocating screw to rotate axially.

[0038] A cylinder is fixedly arranged inside the tank, and a piston is slidably connected to the outside of the cylinder. One end of the piston is fixedly connected to the threaded sleeve.

[0039] A feeding one-way valve is arranged on the cylinder and is in fluid communication with the bottom area of the tank, and is used to allow the pulp to flow into the cylinder in one direction.

[0040] A discharging one-way valve is arranged on the cylinder and is in fluid communication with the pumping space of the pump cavity, and is used to allow the pulp to flow from the cylinder into the pump cavity in one direction.

[0041] The pumping device can also be a delivery pump body, wherein the input end of the flow direction control valve is in communication with the discharge end of the delivery pump body, and the extraction end of the delivery pump body is in communication with the bottom area of the tank. The tank is further provided with a second driving member for driving the rotating shaft to rotate axially.

[0042] Further, the flow direction control valve comprises:

[0043] At least one three-way pipe has one inlet and two outlets. The inlet is in fluid communication with the outlet end of the pumping device. The first outlet is in fluid communication with the first conveying pipe, and the second outlet is in fluid communication with the second conveying pipe.

[0044] A turbidity sensor is arranged at the bottom area of the tank, and is used to monitor the dispersion state parameters of the pulp at the bottom of the tank.

[0045] An electric three-way valve is arranged on the three-way pipe, and is used to selectively connect the inlet of the three-way pipe to the first outlet or the second outlet.

[0046] A concentration sensor is arranged on the inlet flow channel of the tee pipe to monitor the concentration parameter of the pulp flowing to the tee pipe.

[0047] Further, the first conveying pipeline comprises:

[0048] A first conveying branch pipe, having a first end in fluid communication with the first outlet of the flow control valve and a second end extending into the interior of the tank body;

[0049] A connecting seat arranged in the interior of the tank body and in fluid communication with the second end of the first conveying branch pipe, the connecting seat defining a converging cavity in the interior thereof;

[0050] A hollow transmission pipe rotatably penetrating the connecting seat and in fluid communication with the converging cavity of the connecting seat, the hollow transmission pipe having a first end fixedly connected with a driving shaft of the primary dispersion assembly and a second end fixedly connected with a rotating shaft of the secondary dispersion assembly for synchronous driving;

[0051] A plurality of first nozzles arranged on the outer periphery of the hollow transmission pipe and in fluid communication with the interior thereof, the first nozzles having a spraying direction towards the lower surface of the filter screen of the primary dispersion assembly;

[0052] A plurality of second nozzles arranged on the outer periphery of the hollow transmission pipe and in fluid communication with the interior thereof, the second nozzles having a spraying direction towards the upper surface of the filter screen of the primary dispersion assembly and being located between the filter screen and the helical blade of the primary dispersion assembly.

[0053] Further, the second conveying pipeline comprises:

[0054] A central feed pipe arranged along the axial direction of the tank body and penetrating into the interior thereof, the outlet end of the central feed pipe being directed towards the upper region of the helical blade of the primary dispersion assembly;

[0055] A shunt branch pipe, having a first end in fluid communication with the second outlet of the flow control valve and a second end in fluid communication with the inlet end of the central feed pipe;

[0056] An exhaust pipe, having a first end in mutual communication with the interior region of the tank body and a second end further provided with a control valve.

[0057] Further, the control module comprises:

[0058] A data acquisition unit in signal connection with the turbidity sensor and the concentration sensor for real-time acquisition of the turbidity parameter T of the pulp at the bottom of the tank body and the concentration parameter C of the circulating pulp;

[0059] A logic judgment unit preset with a concentration threshold Cmax and turbidity threshold T max , and generates flow direction control instruction according to the following decision tree rules:

[0060] If C≥C max and T≥T max , a first control instruction is generated to direct the pulp to the input area of the primary dispersion assembly and close the control valve of the discharge pipe;

[0061] If C max and T≥T max , a second control instruction is generated to direct the pulp to the input area of the secondary dispersion assembly and close the control valve of the discharge pipe;

[0062] If C max and T max , a third control instruction is generated to reduce the circulation frequency of the circulation assembly and open the control valve of the discharge pipe to discharge part of the qualified pulp;

[0063] The execution control unit is connected to the logic judgment unit and the electric three-way valve, and is used to convert the flow direction control instruction into an electric signal to drive the electric three-way valve to switch to the corresponding flow path:

[0064] When the first control instruction is executed, the second conveying pipeline is connected;

[0065] When the second control instruction is executed, the first conveying pipeline is connected;

[0066] When the third control instruction is executed, the current flow path is maintained and the working frequency of the pumping device is reduced, and the control valve on the discharge pipe is opened to discharge the pulp inside the tank body from the discharge pipe;

[0067] The state monitoring unit is connected to the driving mechanism of the primary dispersion assembly and the secondary dispersion assembly, and is used to synchronously adjust the rotation speed of the spiral blade and the rotation speed of the first and second dynamic grinding plates when the flow path is switched;

[0068] The concentration threshold C max and the turbidity threshold T max are preset according to at least one of the following factors:

[0069] The volume of the tank body:

[0070] When the volume of the tank body is ≤5m 3 , C max =5%, T max =200NTU is set;

[0071] When the volume of the tank body is >5m 3 and ≤20m 3 , C max =6%, Tmax = 180 NTU;

[0072] When the tank volume > 20 m 3 , set C max = 7%, T max = 150 NTU;

[0073] Paper pulp material source:

[0074] If it is virgin wood pulp, set C max = 6%, T max = 180 NTU;

[0075] If it is recycled paper pulp, set C max = 5.5%, T max = 200 NTU;

[0076] If it is mixed pulp, set C max = 6.5%, T max = 160 NTU.

[0077] Compared with the prior art, the technical scheme of the application has the following beneficial technical effects:

[0078] The primary dispersion assembly of the application is specially designed for high-concentration and high-flocculation paper pulp, which reduces the concentration of the paper pulp and destroys large flocculation bodies through rotation disturbance, laying a foundation for subsequent dispersion treatment, the secondary dispersion assembly applies shear action after the primary treatment, further depolymerizing fiber flocculation bodies, and the depth dispersion assembly realizes further separation and uniform distribution of flocculation fibers through extrusion action, ensuring the thoroughness of dispersion; and the circulation assembly can extract the paper pulp from the bottom area of the tank and selectively send it back to the input area of the primary or secondary dispersion assembly, promoting the overall circulation flow of the paper pulp, avoiding the problem of insufficient local dispersion, making the equipment adaptable to paper pulp materials of different concentrations and different flocculation degrees, and finally realizing efficient and uniform dispersion effect, thereby guaranteeing the forming quality and performance stability of the subsequent insulation paper and meeting the industrial production needs. BRIEF DESCRIPTION OF DRAWINGS

[0079] Figure 1 It is a connection structure schematic diagram of the embodiment one of the application as a whole;

[0080] Figure 2 It is a connection structure schematic diagram of the tank body inside of the embodiment one of the application;

[0081] Figure 3 It is a cross-sectional connection structure schematic diagram of the embodiment one of the application;

[0082] Figure 4 It is a connection structure schematic diagram of the primary dispersion assembly and the secondary dispersion assembly of the application;

[0083] Figure 5 Connection structure diagram of secondary dispersion assembly of the present application;

[0084] Figure 6 Connection structure diagram of secondary dispersion assembly and depth dispersion assembly of the present application;

[0085] Figure 7 Connection structure diagram of partial pumping device of the present application;

[0086] Figure 8 Connection structure diagram of first conveying pipeline of the present application;

[0087] Figure 9 Connection structure diagram of connection seat and hollow transmission pipe of the present application;

[0088] Figure 10 Control structure flow block diagram of control module of the present application;

[0089] Figure 11 Connection structure diagram of the present application;

[0090] Figure 12 Connection structure diagram of embodiment two of the present application.

[0091] In the figure: 1, tank body; 2, primary dispersion assembly; 21, annular support frame; 22, filter screen; 23, mounting base; 24, drive shaft; 25, helical blade; 3, secondary dispersion assembly; 31, first fixed grinding disc; 32, through hole; 33, rotating shaft; 34, first movable grinding disc; 4, depth dispersion assembly; 41, second fixed grinding disc; 42, discharge hole; 43, second movable grinding disc; 5, circulating assembly; 51, pumping device; 511, reciprocating piston pumping member; 5111, pump cavity; 5112, reciprocating screw; 5113, threaded sleeve; 5114, cylinder barrel; 5115, piston piece; 5116, inlet one-way valve; 5117, outlet one-way valve; 512, conveying pump body; 52, flow direction control valve; 521, three-way pipe; 522, turbidity sensor; 523, electric three-way valve; 524, concentration sensor; 53, first conveying pipeline; 531, first conveying branch pipe; 532, connection seat; 533, hollow transmission pipe; 535, first spray head; 536, second spray head; 54, second conveying pipeline; 541, central inlet pipe; 542, shunt branch pipe; 543, discharge pipe; 6, control module; 61, data acquisition unit; 62, logic judgment unit; 63, execution control unit; 64, state monitoring unit. DETAILED DESCRIPTION

[0092] Clearly, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all the other embodiments obtained by those of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0093] Embodiment one, in combination Figures 1-11 As shown in the drawings, the dispersion device for insulating paper pulp production of the present application comprises:

[0094] A tank body 1 for containing insulating paper pulp to be dispersed;

[0095] A primary dispersion assembly 2 arranged inside the tank body 1 for rotating disturbance to the high-concentration high-flocculation paper pulp flowing into the tank body 1, so as to reduce the pulp concentration and break the large flocculation;

[0096] A secondary dispersion assembly 3 arranged inside the tank body 1 and located downstream of the primary dispersion assembly 2, for applying shearing action to the primary-dispersed paper pulp to depolymerize the fiber flocculation therein;

[0097] A deep dispersion assembly 4 arranged inside the tank body 1 and located downstream of the secondary dispersion assembly 3, for applying extrusion action to the secondary-dispersed paper pulp to further separate the flocculation fibers and realize uniform distribution of the fibers;

[0098] A circulating assembly 5 arranged on the tank body 1 and communicating with the inside of the tank body 1, for extracting the paper pulp from the bottom area of the tank body 1, and capable of selectively delivering the extracted paper pulp to the input area of the primary dispersion assembly 2 or the secondary dispersion assembly 3, so as to promote the circulating flow of the paper pulp in the tank body 1 and ensure uniform dispersion.

[0099] The insulating paper pulp to be dispersed is firstly introduced into the tank 1, which provides a containing space for the whole dispersion process; when the high-concentration and high-flocculation paper pulp flows into the tank 1, the primary dispersion assembly 2 inside the tank 1 is started to preliminarily process the paper pulp through the rotating disturbance action, so as to reduce the concentration of the paper pulp and destroy the large flocculation bodies therein, thereby creating favorable conditions for the subsequent dispersion steps; the paper pulp after the primary dispersion flows into the secondary dispersion assembly 3 downstream of the primary dispersion assembly 2 under the action of its own gravity and flow, and the secondary dispersion assembly 3 applies a shearing action to the paper pulp to further depolymerize the fiber flocculation bodies in the paper pulp, so that the flocculation bodies are more effectively dispersed; then, the paper pulp after the secondary dispersion continues to flow to the deep dispersion assembly 4 downstream of the secondary dispersion assembly 3, and the deep dispersion assembly 4 further separates the residual flocculation fibers by applying an extrusion action to the paper pulp, so as to finally realize the uniform distribution of the fibers in the paper pulp; in this process, the circulating assembly 5 arranged on the tank 1 and communicating with the inside continuously extracts the paper pulp from the bottom area of the tank 1, and selectively sends the extracted paper pulp to the input area of the primary dispersion assembly 2 or the secondary dispersion assembly 3 according to the dispersion condition of the paper pulp, so as to promote the circulating flow of the paper pulp in the tank 1 and ensure that all the paper pulp can be sufficiently and uniformly dispersed.

[0100] In a preferred embodiment, the application can be further configured as shown in Figure 3 、 Figure 4 The primary dispersion assembly 2 comprises:

[0101] The annular support frame 21 is fixedly installed on the inner wall of the tank 1 and is used to provide support;

[0102] The filter screen 22 is fixedly installed on the annular support frame 21 and is used to allow the dispersed paper pulp to pass through and intercept the flocculation bodies that are not sufficiently dispersed;

[0103] The mounting base 23 is fixedly installed on the inner wall of the tank 1 and is located axially upstream of the annular support frame 21, and is used to provide rotational support;

[0104] The drive shaft 24 is rotatably connected to the center of the mounting base 23;

[0105] A plurality of helical blades 25 are fixedly arranged along the axial direction of the driving shaft 24, each helical blade 25 is obliquely installed relative to the driving shaft 24, and the installation angles of the plurality of helical blades 25 are different from each other, for applying disturbance force and axial thrust to the inflowing high-concentration high-flocculation paper pulp during rotation, to achieve preliminary dispersion and reduce the concentration, when the driving shaft 24 rotates, the plurality of helical blades 25 are driven to rotate together, since the installation angles of the plurality of helical blades 25 are different from each other, they will generate complex and multi-directional disturbance force to the paper pulp during rotation, such disturbance can not only effectively impact and disperse large fiber flocculation bodies, but also simultaneously generate a downward axial thrust to the pulp, to push the pulp to move downstream and pass through the filter screen 22, the filter screen 22 functions to intercept large flocculation bodies that have not been fully dispersed, to ensure that only the pulp that has been preliminarily treated and has a reduced concentration can enter the next stage, thereby preparing for subsequent fine dispersion.

[0106] The application can be further configured as shown in Figure 5 、 Figure 6 The secondary dispersion assembly 3 comprises:

[0107] A first fixed grinding disc 31 is fixedly installed on the inner wall of the tank body 1 and located axially downstream of the primary dispersion assembly 2, the working surface of the first fixed grinding disc 31 has an inner concave surface;

[0108] At least one through hole 32 is formed in the first fixed grinding disc 31;

[0109] A rotating shaft 33 is rotatably installed in the tank body 1;

[0110] A first movable grinding disc 34 is fixedly installed on the rotating shaft 33 and oppositely arranged with the first fixed grinding disc 31, and the working surfaces of the two form a shearing gap for the passage of paper pulp;

[0111] The paper pulp that has been preliminarily dispersed enters the shearing gap between the first fixed grinding disc 31 and the first movable grinding disc 34 through the through hole 32, and the rotation of the first movable grinding disc 34 relative to the first fixed grinding disc 31 applies a shearing action to the paper pulp to depolymerize the fiber flocculation bodies therein, the paper pulp that has been preliminarily dispersed enters the narrow shearing gap formed between the first fixed grinding disc 31 and the first movable grinding disc 34 through the through hole 32 in the first fixed grinding disc 31, when the rotating shaft 33 drives the first movable grinding disc 34 to rotate at high speed, the movable grinding disc moves relative to the fixed grinding disc, and the paper pulp in the gap will be subjected to strong mechanical shearing force, which can effectively tear and separate the small fiber flocculation bodies that still exist after preliminary dispersion, to achieve fiber-level depolymerization and significantly improve the uniformity of the pulp, the inner concave surface of the first fixed grinding disc 31 helps to guide the flow of the pulp and optimize the shearing effect.

[0112] The application can be further configured in a preferred embodiment as shown in Figure 5 、 Figure 6 The depth dispersion assembly 4 comprises:

[0113] The second fixed grinding plate 41 is fixedly installed on the inner wall of the tank body 1 and located axially downstream of the first moving grinding plate 34, and the working surface of the second fixed grinding plate 41 has a horizontal surface facing the first moving grinding plate 34;

[0114] The discharge hole 42 is arranged in the central region of the working surface of the second fixed grinding plate 41;

[0115] The second moving grinding plate 43 is fixedly installed on the rotating shaft 33 and arranged opposite to the second fixed grinding plate 41, and the working surface of the second moving grinding plate 43 is a convex conical surface facing the second fixed grinding plate 41, so that the working surface of the second moving grinding plate 43 and the working surface of the second fixed grinding plate 41 form a gradually decreasing extrusion gap from the edge to the center;

[0116] The paper pulp subjected to the secondary dispersion flows into the extrusion gap between the second fixed grinding plate 41 and the second moving grinding plate 43, and through the rotational movement of the second moving grinding plate 43 relative to the second fixed grinding plate 41, an increasing extrusion action is applied to the paper pulp to further separate the flocculated fibers and promote the uniform distribution of the fibers, and the treated paper pulp is discharged to the bottom region of the tank body 1 through the discharge hole 42. The rotating shaft 33 passes through the discharge hole 42, and the paper pulp subjected to the secondary shear dispersion flows into the extrusion gap formed between the second fixed grinding plate 41 and the second moving grinding plate 43. The particularity of this gap is that the working surface of the second moving grinding plate 43 is a convex conical surface, and the working surface of the second fixed grinding plate 41 is a horizontal surface, so that the gap gradually decreases from the edge to the center. When the second moving grinding plate 43 rotates with the rotating shaft 33, the mechanical extrusion force applied to the pulp during its flow from the edge of the gap to the center of the discharge hole 42 continuously and smoothly increases. This increasing extrusion action can forcibly separate the residual and tightly combined fiber bundles and greatly promote the uniform distribution of individual fibers, and finally obtain highly dispersed qualified pulp and discharge it from the discharge hole 42 to the bottom of the tank body 1.

[0117] The application can be further configured in a preferred embodiment as shown in Figure 2 、 Figure 3 The circulation assembly 5 comprises:

[0118] The pumping device 51 is arranged on the tank body 1 and in fluid communication with the bottom region of the tank body 1, and is used to extract the paper pulp in the bottom region of the tank body 1;

[0119] The flow direction control valve 52 is connected to the outlet end of the pumping device 51 and is used to control the flow direction of the paper pulp;

[0120] A first conveying pipeline 53 is connected to the first outlet of the flow direction control valve 52, and is used to convey the extracted pulp to the input area of the secondary dispersion assembly 3.

[0121] A second conveying pipeline 54 is connected to the second outlet of the flow direction control valve 52, and is used to convey the extracted pulp to the input area of the primary dispersion assembly 2. Through the flow direction control valve 52, the extracted pulp can be selectively returned to the input area of the secondary dispersion assembly 3 or the primary dispersion assembly 2 through the first conveying pipeline 53 or the second conveying pipeline 54, so as to promote the circulating flow of the pulp in the tank 1, ensure the dispersion uniformity, and through the pumping device 51, the pulp that has been partially or completely treated is extracted from the bottom of the tank 1, and then the flow direction of the pulp is determined by the flow direction control valve 52. The pumping device 51 provides conveying power, and the flow direction control valve 52 can selectively convey the extracted pulp to the input area of the secondary dispersion assembly 3 through the first conveying pipeline 53 for re-shearing dispersion, or to the input area of the primary dispersion assembly 2 through the second conveying pipeline 54 for re-dispersion and concentration reduction. The selective circulating mechanism ensures that all the pulp in the tank can be repeatedly treated until the required dispersion uniformity is achieved, and solves the problem of unevenness in single treatment.

[0122] In a preferred embodiment, the application can be further configured as shown in Figure 3 、 Figure 7 The pumping device 51 is a reciprocating piston pumping member 511, which comprises:

[0123] A pump cavity 5111 is fixedly arranged outside the tank 1, and the inside of the pump cavity 5111 defines a pumping space. The inlet of the flow direction control valve 52 is in fluid communication with the pumping space of the pump cavity 5111.

[0124] A reciprocating screw 5112 is fixedly installed at the end of the rotating shaft 33, and a threaded sleeve 5113 is threadedly connected to the outside of the reciprocating screw 5112. The outside of the tank 1 is further provided with a first driving member for driving the reciprocating screw 5112 to rotate axially.

[0125] A cylinder barrel 5114 is fixedly installed in the tank 1. A piston member 5115 is slidably connected to the outside of the cylinder barrel 5114 in the cylinder barrel 5114. One end of the piston member 5115 is fixedly connected to the threaded sleeve 5113.

[0126] A feeding one-way valve 5116 is arranged on the cylinder barrel 5114 and is in fluid communication with the bottom area of the tank 1, and is used to allow the pulp to flow into the cylinder barrel 5114 in one direction.

[0127] The discharge one-way valve 5117 is arranged on the cylinder 5114 and is in fluid communication with the pumping space of the pump chamber 5111, for allowing the pulp to flow from the cylinder 5114 to the pump chamber 5111 in one direction, the power source of the reciprocating piston pumping member 511 is derived from the first driving member driving the reciprocating screw 5112 to rotate, the rotary motion of the reciprocating screw 5112 is converted into linear reciprocating motion through the threaded sleeve 5113 matched with it, so as to drive the piston member 5115 to reciprocate in the cylinder 5114, when the piston member 5115 returns, under the action of negative pressure, the inlet one-way valve 5116 is opened, and the discharge one-way valve 5117 is closed, the pulp at the bottom of the tank is sucked into the cylinder 5114, when the piston member 5115 advances, the pressure makes the inlet one-way valve 5116 close, and the discharge one-way valve 5117 opens, the pulp is pressed into the pump chamber 5111, and then pumped to the flow direction control valve 52, this design ingeniously converts the power of the rotary main shaft into pumping power, and it should be noted that the first driving member is composed of a first driving motor and a rotating rod, the first driving motor is fixedly installed at the bottom of the tank body 1, and the output end of the first driving motor extends to the inside of the tank body 1, the output end of the first driving motor is fixedly connected with the rotating rod, and the end of the rotating rod is fixedly connected with the end of the reciprocating screw 5112.

[0128] The application can be further configured as shown in Figure 2 、 Figure 3 The flow direction control valve 52 comprises:

[0129] At least one three-way pipe 521 has one inlet and two outlets, the inlet is in fluid communication with the outlet end of the pumping device 51, the first outlet is in fluid communication with the first conveying pipeline 53, and the second outlet is in fluid communication with the second conveying pipeline 54;

[0130] The turbidity sensor 522 is arranged in the bottom region of the tank body 1 and is used for monitoring the dispersion state parameter of the pulp at the bottom of the tank body 1;

[0131] The electric three-way valve 523 is arranged on the three-way pipe 521 and is used for selectively connecting the inlet of the three-way pipe 521 to the first outlet or the second outlet;

[0132] The concentration sensor 524 is arranged on the inlet flow channel of the three-way pipe 521 and is used for monitoring the concentration parameter of the pulp flowing to the three-way pipe 521.

[0133] The turbidity sensor 522 and the concentration sensor 524 are both in signal connection with the electrically controlled flow direction switching motor three-way valve 523, and are used to generate a control signal based on the monitored dispersion state parameter and concentration parameter, so as to automatically control the selection of the pulp flow direction. The whole is realized by intelligent flow direction switching based on sensor monitoring and logical judgment. The turbidity sensor 522 monitors the dispersion state turbidity of the pulp at the bottom of the tank body 1, which indirectly reflects the dispersion effect. The concentration sensor 524 monitors the concentration of the pulp to be circulated. The signals of the two sensors are transmitted to the motor three-way valve 523. According to the preset strategy, for example, if the concentration is too high or the turbidity is too low, it indicates that the dispersion is insufficient, a control signal is automatically generated, and the motor three-way valve 523 is driven to execute an action. Whether the pulp is switched to the first outlet leading to the secondary dispersion assembly 3 or the second outlet leading to the primary dispersion assembly 2 through the three-way pipe 521, so as to realize the automatic and intelligent control of the circulation process, and optimize the dispersion efficiency and effect.

[0134] In a preferred embodiment of the present application, it can be further configured as shown in Figure 3 、 Figure 8 and Figure 9 ; the first conveying pipeline 53 comprises:

[0135] The first conveying branch pipe 531 has a first end in fluid communication with the first outlet of the flow direction control valve 52, and a second end extending into the inside of the tank body 1;

[0136] The connecting seat 532 is arranged in the inside of the tank body 1 and in fluid communication with the second end of the first conveying branch pipe 531. The inside of the connecting seat 532 defines a flow converging cavity;

[0137] The hollow transmission pipe 533 is rotatably arranged in the connecting seat 532 and in fluid communication with the flow converging cavity of the connecting seat 532. The first end of the hollow transmission pipe 533 is fixedly connected with the driving shaft 24 of the primary dispersion assembly 2, and the second end is fixedly connected with the rotating shaft 33 of the secondary dispersion assembly 3 for synchronous driving. Two sealing bearings are embedded at the shaft center of the connecting seat 532. The hollow transmission pipe 533 and the inner ring of the sealing bearings are fixedly connected with each other. By arranging the sealing bearings, it is ensured that the fluid in the backflow cavity will not seep out from the connection between the hollow transmission pipe 533 and the connecting seat 532. A circular hole is formed in the surface of the hollow transmission pipe 533 and in communication with the connecting seat 532. The material in the connecting seat 532 can enter the hollow transmission pipe 533 through the circular hole;

[0138] A plurality of first nozzles 535 are arranged on the outer periphery of the hollow transmission pipe 533 and in fluid communication with the inside thereof. The spraying direction of the first nozzles 535 is towards the lower surface of the filter screen 22 of the primary dispersion assembly 2;

[0139] A plurality of second nozzles 536 are arranged on the outer periphery of the hollow transmission pipe 533 and are in fluid communication with the interior of the hollow transmission pipe 533, the spraying direction of the second nozzles 536 is towards the upper surface of the filter screen 22 of the primary dispersion assembly 2 and is located between the filter screen 22 and the helical blade 25 of the primary dispersion assembly 2;

[0140] The pulp flowing back through the first conveying pipe 53 flows through the first conveying branch pipe 531 and the converging cavity of the connecting seat 532 into the hollow transmission pipe 533, and is sprayed out by the plurality of first nozzles 535 and the plurality of second nozzles 536 towards the upper and lower surfaces of the filter screen 22 respectively, the pulp circulating back is introduced into a rotating hollow transmission pipe 533 and is sprayed out from the nozzles thereon to achieve two purposes: one is to drive synchronization, and the other is to clean and disperse. When the pulp is selected to be circulated to the input area of the secondary dispersion assembly 3, the pulp flows through the first conveying branch pipe 531 and the connecting seat 532 after converging, and then enters the interior of the high-speed rotating hollow transmission pipe 533. The pulp is sprayed out at high speed from the plurality of first nozzles 535 and the plurality of second nozzles 536 under the action of pressure. Since the hollow transmission pipe 533 is rotating, the sprayed pulp flow has impact kinetic energy. The second nozzles 536 spray the pulp flow upwards from below at a certain pressure and flow rate. This jet directly impacts the lower surface of the filter screen 22, and the mechanical effect is: physical stripping: the fiber flocculation blocked in the mesh is "flushed" out or "pushed" back. Hydraulic shearing: high-speed fluid produces shearing action on the surface of the mesh to strip off the fine fibers adhered. The ultimate goal is to achieve online, real-time and automatic "backwashing" without the need to stop and clean, thereby greatly extending the continuous operation time of the equipment, ensuring the persistent smoothness of the filtration channel and maintaining stable production efficiency; the first nozzles 535 spray the pulp flow downwards from above. The effect of this jet is: cleaning guarantee: ensuring that the lower surface of the filter screen 22 also remains clean without any suspended or adhered fibers, forming a "double insurance". Fluid boost: providing a downward axial thrust and fluid kinetic energy for the pulp just passing through the filter screen 22 and entering the downstream area, assisting its flow and preventing the formation of a "dead zone" or pulp accumulation below the filter screen. The spraying of the two nozzles in opposite directions forms a complex and turbulent fluid flow field in the limited space near the filter screen 22. This highly turbulent state itself has an additional hydraulic dispersion effect on the pulp, which can further disperse the small flocculation that has just passed through the filter screen but has not been completely separated, thereby improving the overall effect of the primary dispersion.

[0141] In a preferred embodiment, the application can be further configured as shown in Figure 1 、 Figure 3 The second conveying pipe 54 includes:

[0142] A central feed pipe 541 is arranged in the axial direction of the tank body 1 and penetrates into the interior thereof, and the outlet end of the central feed pipe 541 is directed towards the upper area of the helical blade 25 of the primary dispersion assembly 2.

[0143] a branch pipe 542, having a first end in fluid communication with the second outlet of the flow direction control valve 52 and a second end in fluid communication with an inlet end of the central feed pipe 541;

[0144] an outlet pipe 543, having a first end in fluid communication with the interior region of the tank 1 and a second end further provided with a control valve.

[0145] Wherein, the pulp flowing back through the second conveying pipe 54 flows through the branch pipe 542 and the central feed pipe 541 in sequence, and is discharged from the outlet end to the upper region of the spiral blade 25 to participate in the primary dispersion process. The primary dispersion assembly 2 provides direct pulp backflow and supplementary input. When the pulp is selected to be circulated back to the primary dispersion assembly 2, the pulp enters the central feed pipe 541 through the branch pipe 542, and the outlet end of the central feed pipe 541 is located in the upper region of the spiral blade 25. The backflowing pulp is directly poured or injected into the ongoing primary dispersion region, mixed with new high-concentration pulp, and participates in the dispersion and concentration reduction process of the spiral blade 25 again. The outlet pipe 543 serves as the outlet of the final qualified product, and the control valve is opened when discharge is required.

[0146] In a preferred embodiment, the application can be further configured as shown in Figure 10 Further comprising a control module 6, the control module 6 comprising:

[0147] a data acquisition unit 61, connected in signal with the turbidity sensor 522 and the concentration sensor 524, for acquiring the turbidity parameter T of the pulp at the bottom of the tank 1 and the concentration parameter C of the circulating pulp in real time;

[0148] a logic judgment unit 62, preset with a concentration threshold C max and a turbidity threshold T max , and generating a flow direction control instruction according to the following decision tree rules:

[0149] If C≥C max or T≥T max : generate a first control instruction to guide the pulp to the input region of the primary dispersion assembly 2 and close the control valve of the outlet pipe 543;

[0150] If C<C max and T≥T max : generate a second control instruction to guide the pulp to the input region of the secondary dispersion assembly 3 and close the control valve of the outlet pipe 543;

[0151] If C<C max and T<T max : generate a third control instruction to reduce the circulation frequency of the circulating assembly 5 and open the control valve of the outlet pipe 543 to discharge part of the qualified pulp;

[0152] The execution control unit 63 is connected to the logic judgment unit 62 and the electric three-way valve 523, and is used to convert the flow direction control command into an electric signal to drive the electric three-way valve 523 to switch to the corresponding flow path:

[0153] When the first control command is executed, the second conveying pipeline 54 is connected;

[0154] When the second control command is executed, the first conveying pipeline 53 is connected;

[0155] When the third control command is executed, the current flow path is maintained, the working frequency of the pumping device 51 is reduced, and the control valve on the discharge pipe 543 is opened to discharge the pulp inside the tank 1 through the discharge pipe 543;

[0156] The state monitoring unit 64 is connected to the driving mechanism of the primary dispersion assembly 2 and the secondary dispersion assembly 3, and is used to adjust the rotation speed of the spiral blade 25 and the rotation speed of the first dynamic mill disc 34 and the second dynamic mill disc 43 synchronously when the flow path is switched;

[0157] The concentration threshold value C max and the turbidity threshold value T max are preset according to at least one of the following factors:

[0158] The volume of the tank 1:

[0159] When the volume of the tank is ≤5m 3 , C max =5%, T max =200NTU;

[0160] When the volume of the tank is >5m 3 and ≤20m 3 , C max =6%, T max =180NTU;

[0161] When the volume of the tank is >20m 3 , C max =7%, T max =150NTU;

[0162] The source of the pulp material:

[0163] If it is virgin wood pulp, C max =6%, T max =180NTU;

[0164] If it is recycled pulp, C max =5.5%, T max =200NTU;

[0165] If it is mixed pulp, Cmax =6.5%,T max =160NTU; the control module (6) further comprises a threshold adaptive unit, configured to dynamically adjust the values of the concentration threshold C max and the turbidity threshold T max according to the real-time collected pulp processing efficiency and dispersion quality feedback data, so as to achieve more accurate circulation control.

[0166] Threshold setting based on tank volume:

[0167] Technical basis: the volume of the tank directly determines the residence time of the pulp in the processing system, the total amount of circulation, and the load that needs to be processed by the dispersion assembly.

[0168] Small volume ≤5m 3 : The total amount of pulp in the system is small, the circulation path is short, faster reaction and stricter dispersion standards are required to prevent unqualified pulp from entering the downstream or being discharged too quickly. Therefore, setting a stricter threshold means that slightly higher concentration or turbidity will trigger circulation.

[0169] Medium volume >5m 3 and ≤20m 3 : This is a common industrial scale, a balance between processing efficiency and dispersion quality is achieved, and a moderate threshold is set.

[0170] Large volume >20m 3 : The system has strong buffering capacity, and the pulp has a longer residence time for processing. A slightly looser threshold can be allowed to avoid frequent start of the circulation pump and switching of the valve due to minor fluctuations, which is beneficial to energy saving and stable operation of the equipment. Lower turbidity threshold means higher dispersion requirement, because the better the dispersion, the lower the turbidity usually is;

[0171] Threshold setting based on pulp material source:

[0172] Technical basis: Different sources of pulp have huge differences in physical and chemical properties such as fiber length, strength, impurity content, and flocculation tendency, so different processing intensity and judgment standards are required.

[0173] Virgin wood pulp: long and pure fibers, relatively easy to disperse, but high concentration may also be unevenly processed. Standard threshold is adopted.

[0174] Recycled pulp: short fibers, low strength, and containing ink, filler and other impurities, more likely to form stubborn flocculation, difficult to disperse. Therefore, more sensitive concentration control and stricter dispersion quality requirement are required, i.e. slightly high concentration or slightly poor dispersion needs to be returned to the front for intensive processing.

[0175] Mixed pulp: properties between the two, may tolerate slightly higher concentration for efficiency, but requires higher dispersion quality at the same time;

[0176] Machine learning or adaptive control algorithm is also introduced, which can dynamically fine-tune the threshold value according to the actual operation effect feedback of the equipment;

[0177] The threshold adaptive unit is a newly added software function module or embedded algorithm integrated in the control module 6. The real-time collected pulp processing efficiency and dispersion quality feedback data are the learning materials of this unit, including:

[0178] Processing efficiency: the output of qualified pulp per unit time, the number of cycles required to meet the qualified standard, the average single processing time, etc.

[0179] Dispersion quality feedback: not only the final turbidity value, but also possibly including the rate of turbidity drop, the concentration change curve, and the performance test data of the final product pulp.

[0180] Dynamic adjustment: this is the core function of the unit. Its operation logic is:

[0181] Over-processing is found: if the system finds that the pulp quickly falls below the expected time to reach the preset concentration threshold C max and turbidity threshold T max , it may judge that the current threshold is too loose, causing the equipment to work excessively and waste energy. Therefore, it will automatically lower the concentration threshold C max and turbidity threshold T max to make the qualified standard more stringent, thereby stopping the cycle at an earlier stage and saving energy.

[0182] Under-processing is found: if the system finds that even after multiple cycles, the turbidity of the pulp is always hovering around the threshold, it is difficult to stabilize and meet the standard, it may judge that the current threshold is too strict, or it is difficult to achieve under the current working conditions. In order to ensure production, it may automatically increase the concentration threshold C max and turbidity threshold T max to find a balance point that can guarantee basic quality and smooth production under the current raw material and equipment state.

[0183] Optimal value is found: the system continuously records the processing results under different thresholds, and through algorithm optimization, it finally finds the optimal concentration and turbidity thresholds for the current batch of raw materials and the current equipment wear state.

[0184] The data acquisition unit 61 continuously obtains data from the turbidity sensor 522 and the concentration sensor 524, and the logic judgment unit 62 has a decision tree that compares real-time data with preset concentration thresholds and turbidity thresholds:

[0185] If either the concentration or the turbidity exceeds the standard, the dispersion is insufficient, and the slurry is instructed to be sent back to the primary dispersion assembly 2 at the front end for intensive dispersion.

[0186] If the concentration is qualified but the turbidity exceeds the standard, the primary dispersion is qualified but the fine dispersion is insufficient, and the slurry is instructed to be sent back to the secondary dispersion assembly 3 for shearing dispersion.

[0187] If both the concentration and the turbidity are qualified, the cycle frequency is reduced and the discharge valve is opened to discharge the qualified product.

[0188] After receiving the instruction, the execution control unit 63 drives the electric three-way valve 523 to switch the corresponding flow path and controls the valve of the discharge pipe 543. The state monitoring unit 64 ensures that the rotation speed of the spiral blades 25, the first dynamic grinding disc 34 and the second dynamic grinding disc 43 are adjusted synchronously when the flow path is switched, so that the working state of the equipment matches the characteristics of the slurry being processed, such as the concentration and state of the backflow slurry, and global optimization control is achieved.

[0189] The specific working principle of the dispersion equipment for insulating paper pulp production of the application is as follows:

[0190] The high-concentration and high-flocculation insulating paper pulp to be dispersed is first introduced into the tank body 1 through the feed port, and the slurry first enters the treatment area of the primary dispersion assembly 2 under the action of gravity. At this time, the drive shaft 24 is driven to rotate by the first drive motor, the rotating rod, the reciprocating screw 5112 and the hollow transmission pipe 533, which drives the plurality of spiral blades 25 with different inclination angles to rotate together. These specially designed blades generate complex multi-directional disturbance forces and downward axial thrust on the slurry, which preliminarily disperses, rubs and reduces the local concentration of the large flocculation, and the preliminarily treated slurry is pushed to the filter screen 22 under the action of the thrust. The filter screen 22 intercepts the large flocculation that has not been fully dispersed and allows the preliminarily qualified slurry to pass through.

[0191] The slurry that has been dispersed by the primary dispersion assembly and passed through the filter screen 22 then flows into the input area of the secondary dispersion assembly 3. The slurry enters the narrow shearing gap formed by the working surface of the first fixed grinding disc 31 and the first dynamic grinding disc 34 through the through hole 32 on the first fixed grinding disc 31. The rotating shaft 33 drives the first dynamic grinding disc 34 to rotate at high speed, which produces strong relative motion with the fixed first fixed grinding disc 31 and exerts high-efficiency shearing action on the slurry in the gap, further depolymerizing the small fiber flocculation and realizing fine dispersion of the fiber level.

[0192] Subsequently, the slurry naturally flows into the deep dispersion assembly 4, and the slurry enters a gradually decreasing extrusion gap from the edge to the center formed by the horizontal working surface of the second fixed grinding disc 41 and the convex conical surface of the second moving grinding disc 43, which rotates with the rotating shaft 33, driving the slurry to move towards the center of the discharge hole 42. In this process, the mechanical extrusion force on the slurry continuously and smoothly increases, and this incremental extrusion effect can forcibly separate the remaining tightly bound fiber bundles and greatly promote the uniform distribution of fibers, ultimately obtaining highly dispersed qualified slurry, and then discharging it to the bottom area of the tank 1 through the discharge hole 42;

[0193] During the entire dispersion process, the circulating assembly 5 continuously works to ensure dispersion uniformity. The reciprocating piston pumping member 511 of the pumping device 51, driven by the first driving member, rotates the reciprocating screw 5112, which drives the piston member 5115 to reciprocate in the cylinder 5114 through the threaded sleeve 5113. When the piston member 5115 returns, the inlet one-way valve 5116 opens and the outlet one-way valve 5117 closes, and the pulp at the bottom of the tank 1 is sucked into the cylinder 5114, and vice versa when it proceeds. The pulp is pressed into the pump cavity 5111 and delivered to the flow control valve 52. The turbidity sensor 522 monitors the dispersion state and turbidity of the slurry at the bottom of the tank in real time, and the concentration sensor 524 monitors the concentration of the circulating slurry. These data are sent to the control module 6.

[0194] The data acquisition unit 61 of the control module 6 acquires sensor data, and the logical judgment unit 62 judges according to the preset concentration and turbidity thresholds:

[0195] If either the concentration or the turbidity exceeds the threshold, indicating insufficient dispersion, an instruction is generated to control the electric three-way valve 523 to switch, so that the slurry flows back through the second delivery pipeline 54, through the shunt branch pipe 542 and the central feed pipe 541 to the area above the spiral blade 25 of the primary dispersion assembly 2, for re-dispersion, and the state monitoring unit 64 can simultaneously adjust the assembly speed;

[0196] If the concentration is qualified and the turbidity exceeds the threshold, indicating that the primary dispersion is qualified but the fine dispersion is insufficient, an instruction is generated to control the electric three-way valve 523 to switch, so that the slurry flows back through the first delivery pipeline 53. The slurry enters the converging cavity of the connecting seat 532 through the first delivery branch pipe 531, and then flows into the hollow drive pipe 533 rotating at high speed, and finally is sprayed out from the first nozzle 535 and the second nozzle 536. The upwardly spraying second nozzle 536 performs backwashing to prevent the filter screen 22 from being blocked, and the downwardly spraying first nozzle 535 cleans the lower surface of the filter screen and assists the delivery of the slurry. At the same time, the impact of the spray also has an auxiliary dispersion effect on the slurry, which then enters the secondary dispersion assembly 3 for re-shearing dispersion;

[0197] If both concentration and turbidity are within acceptable limits, an instruction is generated to reduce the operating frequency of the pumping device 51 and open the control valve on the discharge pipe 543 to discharge part of the qualified finished slurry into the system.

[0198] Through the automated process combining multi-stage dispersion with intelligent circulation based on real-time monitoring, this invention effectively overcomes the shortcomings of the prior art, such as the narrow applicable concentration range of single-type disc mills, inability to effectively handle severe flocculation, and uneven dispersion. It achieves efficient, uniform, and stable dispersion of high-concentration, highly flocculated insulating paper pulp under complex working conditions.

[0199] Example 2 differs from Example 1 in that... Figure 12 As shown: the pumping device 51 can also be a conveying pump body 512, wherein the input end of the flow direction control valve 52 is connected to the discharge end of the conveying pump body 512, and the extraction end of the conveying pump body 512 is connected to the bottom area of ​​the tank 1. The tank 1 is also provided with a second driving component for driving the rotating shaft 33 to rotate axially. The second driving component consists of a second driving motor and a rotating rod. This is a simpler independent pumping scheme. The conveying pump body 512 directly draws pulp from the bottom of the tank through its extraction end and pumps the pulp to the flow direction control valve 52 through its discharge end. At this time, the rotating shaft 33 needs to be driven by an independent second driving component. The second driving motor is fixedly installed at the bottom of the tank 1, and the output end of the second driving motor penetrates and extends into the interior of the tank 1. The output end of the second driving motor is fixedly connected to the end of the rotating rod, and the end of the rotating rod is fixedly connected to the end of the rotating shaft 33. The rotating rod and the rotating shaft 33 are driven to rotate by the second driving motor.

[0200] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0201] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A dispersion device for producing insulating paper pulp, characterized in that, include: Tank (1), used to hold insulating paper pulp to be dispersed; The primary dispersion component (2) is disposed inside the tank (1) and is used to rotate and disturb the high-concentration, highly flocculated pulp flowing into the tank (1) to reduce the pulp concentration and break down large flocs; The secondary dispersion component (3) is disposed inside the tank (1) and located downstream of the primary dispersion component (2). It is used to apply a shearing action to the pulp after primary dispersion to deagglomerate the fiber flocs therein. The deep dispersion component (4) is disposed inside the tank (1) and located downstream of the secondary dispersion component (3). It is used to apply a squeezing action to the pulp after secondary dispersion in order to further separate the flocculated fibers and achieve uniform fiber distribution. The circulation component (5) is disposed on the tank (1) and communicates with the inside of the tank (1). It is used to draw pulp from the bottom area of ​​the tank (1) and can selectively transport the drawn pulp to the input area of ​​the primary dispersion component (2) or the secondary dispersion component (3) to promote the circulation of pulp in the tank (1) and ensure uniform dispersion. A pumping device (51) is installed on the tank (1) and is in fluid communication with the bottom area of ​​the tank (1) for extracting pulp from the bottom area of ​​the tank (1); The pumping device (51) is a reciprocating piston pumping component (511), which includes: The pump chamber (5111) is fixedly installed outside the tank (1), and its interior defines a pumping space. The inlet of the control valve (52) is in fluid communication with the pumping space of the pump chamber (5111). A reciprocating screw (5112) is fixedly installed at the end of the rotating shaft (33), and a threaded sleeve (5113) is threadedly connected to its exterior. The tank body (1) is also provided with a first driving component for driving the reciprocating screw (5112) to rotate axially. A cylinder (5114) is fixedly installed inside the tank (1). A piston (5115) is slidably connected to the outside of the cylinder (5114). One end of the piston (5115) is fixedly connected to the threaded sleeve (5113). A feed check valve (5116) is provided on the cylinder (5114) and is in fluid communication with the bottom area of ​​the tank (1) to allow pulp to flow into the cylinder (5114) in one direction. A discharge check valve (5117) is disposed on the cylinder (5114) and is in fluid communication with the pumping space of the pump chamber (5111) to allow pulp to flow unidirectionally from the cylinder (5114) into the pump chamber (5111).

2. The dispersion equipment for producing insulating paper pulp according to claim 1, characterized in that, The primary dispersion component (2) includes: An annular support frame (21) is fixedly installed on the inner wall of the tank (1) to provide support; A filter screen (22) is fixedly installed on the annular support frame (21) to allow the dispersed pulp to pass through and to intercept insufficiently dispersed flocs; The mounting base (23) is fixedly installed on the inner wall of the tank (1) and located axially upstream of the annular support frame (21) to provide rotational support; The drive shaft (24) is rotatably connected to the center of the mounting base (23); Multiple spiral blades (25) are fixedly arranged at intervals along the axial direction of the drive shaft (24). Each spiral blade (25) is installed at an inclination relative to the drive shaft (24), and the installation angles of the multiple spiral blades (25) are different from each other. They are used to apply disturbance force and axial thrust to the flowing high-concentration, highly flocculated pulp when rotating, so as to achieve initial dispersal and reduce concentration.

3. The dispersion equipment for producing insulating paper pulp according to claim 2, characterized in that, The secondary distributed component (3) includes: The first fixed grinding disc (31) is fixedly installed on the inner wall of the tank (1) and located axially downstream of the primary dispersion component (2). The working surface of the first fixed grinding disc (31) has a concave curved surface. At least one through hole (32) is provided on the first fixed grinding disc (31); The rotating shaft (33) is rotatably installed inside the tank (1); The first moving grinding disc (34) is fixedly installed on the rotating shaft (33) and is arranged opposite to the first fixed grinding disc (31), and a shearing gap for pulp to pass through is formed between their working surfaces; The pulp, after primary dispersion, enters the shear gap between the first fixed grinding disc (31) and the first moving grinding disc (34) through the through hole (32). The first moving grinding disc (34) applies a shearing action to the pulp by rotating relative to the first fixed grinding disc (31) to deagglomerate the fiber flocs therein.

4. The dispersion equipment for producing insulating paper pulp according to claim 3, characterized in that, The deep dispersion component (4) includes: The second fixed grinding disc (41) is fixedly installed on the inner wall of the tank (1) and located axially downstream of the first moving grinding disc (34). The working surface of the second fixed grinding disc (41) has a horizontal surface facing the first moving grinding disc (34). The discharge hole (42) is located in the central area of ​​the working surface of the second fixed grinding disc (41); The second moving grinding disc (43) is fixedly installed on the rotating shaft (33) and is arranged opposite to the second fixed grinding disc (41). The working surface of the second moving grinding disc (43) is a convex conical surface facing the second fixed grinding disc (41), so that a compression gap gradually decreases from the edge to the center is formed between the working surfaces of the second moving grinding disc (43) and the second fixed grinding disc (41). The pulp, after secondary dispersion, flows into the extrusion gap between the second fixed grinding disc (41) and the second moving grinding disc (43). Through the rotational motion of the second moving grinding disc (43) relative to the second fixed grinding disc (41), an increasing extrusion action is applied to the pulp to further separate the flocculated fibers and promote the uniform distribution of fibers. The treated pulp is discharged to the bottom area of ​​the tank (1) through the discharge hole (42).

5. The dispersion equipment for producing insulating paper pulp according to claim 3, characterized in that, The loop component (5) includes: The flow control valve (52) is connected to the outlet end of the pumping device (51) and is used to control the flow direction of the pulp. The first delivery pipeline (53) is connected to the first outlet of the flow control valve (52) and is used to deliver the extracted pulp to the input area of ​​the secondary dispersion component (3). The second conveying pipeline (54) is connected to the second outlet of the flow control valve (52) and is used to convey the extracted pulp to the input area of ​​the primary dispersion component (2). Through the flow control valve (52), the extracted pulp can be selectively returned to the input area of ​​the secondary dispersion component (3) or the primary dispersion component (2) via the first conveying pipeline (53) or the second conveying pipeline (54) to promote the circulation of pulp in the tank (1) and ensure uniform dispersion.

6. The dispersion equipment for producing insulating paper pulp according to claim 5, characterized in that, The flow control valve (52) includes: At least one tee pipe (521) has an inlet and two outlets, the inlet being in fluid communication with the outlet end of the pumping device (51), the first outlet being in fluid communication with the first delivery line (53), and the second outlet being in fluid communication with the second delivery line (54); A turbidity sensor (522) is installed in the bottom area of ​​the tank (1) to monitor the dispersion state parameters of the pulp at the bottom of the tank (1); An electric three-way valve (523) is disposed on the three-way pipe (521) for selectively connecting the inlet of the three-way pipe (521) to the first outlet or the second outlet; A concentration sensor (524) is installed on the inlet channel of the three-way pipe (521) to monitor the concentration parameters of the pulp flowing into the three-way pipe (521).

7. The dispersion equipment for producing insulating paper pulp according to claim 6, characterized in that, The first delivery pipeline (53) includes: The first delivery branch pipe (531) has its first end connected to the first outlet of the flow direction control valve (52) in fluid communication, and its second end extends into the tank (1); A connecting seat (532) is disposed inside the tank (1) and is in fluid communication with the second end of the first conveying branch pipe (531). The connecting seat (532) has a manifold defined inside. A hollow transmission tube (533) is rotatably disposed through the connecting seat (532) and is in fluid communication with the manifold of the connecting seat (532). The first end of the hollow transmission tube (533) is fixedly connected to the drive shaft (24) of the primary dispersion component (2), and its second end is fixedly connected to the rotating shaft (33) of the secondary dispersion component (3) for synchronous driving. Multiple first nozzles (535) are disposed on the outer periphery of the hollow transmission tube (533) and in fluid communication with its interior. The spraying direction of the first nozzles (535) is toward the lower surface of the filter screen (22) of the primary dispersion assembly (2). Multiple second nozzles (536) are disposed on the outer periphery of the hollow transmission tube (533) and in fluid communication with its interior. The spray direction of the second nozzles (536) is toward the upper surface of the filter screen (22) of the primary dispersion component (2) and is located between the filter screen (22) and the spiral blades (25) of the primary dispersion component (2).

8. The dispersion equipment for producing insulating paper pulp according to claim 7, characterized in that, The second delivery pipeline (54) includes: A central feed pipe (541) is arranged along the axial direction of the tank (1) and extends into its interior, with the outlet end of the central feed pipe (541) facing the area above the spiral blades (25) of the primary dispersion assembly (2). The branch pipe (542) has its first end in fluid communication with the second outlet of the flow control valve (52) and its second end in fluid communication with the inlet end of the central feed pipe (541). The discharge pipe (543) has its first end connected to the internal area of ​​the tank (1), and its second end is also equipped with a control valve.

9. A dispersion device for producing insulating paper pulp according to claim 8, characterized in that, It also includes a control module (6), which includes: The data acquisition unit (61) is connected to the turbidity sensor (522) and the concentration sensor (524) for real-time acquisition of the turbidity parameter T and the concentration parameter C of the circulating pulp at the bottom of the tank (1); The logic judgment unit (62) is preset with a concentration threshold C. max and turbidity threshold T max And generate flow control instructions according to the following decision tree rules: If C≥C max or T≥T max Generate the first control command to guide the pulp to the input area of ​​the primary dispersion component (2) and close the control valve of the discharge pipe (543); If C < C max And T≥T max Generate a second control command to guide the pulp to the input area of ​​the secondary dispersion component (3) and close the control valve of the discharge pipe (543); If C < C max And T < T max : Generate a third control command to reduce the circulation frequency of the circulation component (5) and open the control valve of the discharge pipe (543) to discharge a portion of the qualified pulp; The execution control unit (63), connected to the logic judgment unit (62) and the electric three-way valve (523), is used to convert the flow direction control command into an electrical signal to drive the electric three-way valve (523) to switch to the corresponding flow path. When the first control command is executed, the second delivery pipeline (54) is connected. When the second control command is executed, the first delivery pipeline (53) is connected. When executing the third control command, maintain the current flow path and reduce the operating frequency of the pumping device (51), and open the control valve on the discharge pipe (543) to discharge the pulp inside the tank (1) through the discharge pipe (543); The status monitoring unit (64) is connected to the drive mechanism of the primary dispersion component (2) and the secondary dispersion component (3) for synchronously adjusting the rotation speed of the spiral blade (25) and the rotation speed of the first moving grinding disc (34) and the second moving grinding disc (43) when switching the flow path; The concentration threshold C max and turbidity threshold T max The value is preset based on at least one of the following factors: Volume of tank (1): When the tank volume is ≤5m³ 3 At that time, set C max =5%,T max =200 NTU; When the tank volume is >5m³ 3 and ≤20m 3 At that time, set C max =6%,T max =180 NTU; When the tank volume is >20m³ 3 At that time, set C max =7%,T max =150 NTU; Pulp material source: If it is virgin wood pulp, set C. max =6%,T max =180 NTU; If it is for recycled pulp, set C max =5.5%,T max =200 NTU; If it is a mixed slurry, set C. max =6.5%,T max =160 NTU.

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