A pulp mixing system

Abstract

This application relates to the technical field of pulp mixing and discloses a pulp mixing system, which includes a pretreatment unit for dissolving a substrate into semi-finished pulp; a mixing unit including two mixing tanks arranged side by side for receiving semi-finished pulp and additives; and an additive adding unit for adding additives to the mixing tanks; wherein the mixing tanks are configured to alternately feed materials, so that when one mixing tank feeds material to a downstream process, the other mixing tank receives the semi-finished pulp and additives for mixing. This application can improve production efficiency.

Description

Technical Field

[0001] This application relates to the technical field of pulp mixing, and more particularly to a pulp mixing system. Background Technology

[0002] In the production of disposable paper tableware, functional additives such as waterproofing agents and oil-resistant agents are usually added to the base material to give the disposable paper tableware the corresponding functions. In the production process, the base material needs to be dissolved in water to form a semi-finished pulp, which is then transported to a mixing tank to be fully mixed with various additives, and finally transported to the forming workshop for hot pressing.

[0003] However, the current production workshop has a large demand for mixed pulp. After a batch of pulp is prepared and transported to the molding workshop, a single mixing tank must wait for the batch of pulp to be used up and the mixing tank to be emptied before the next batch of pulp can be prepared. During this period, the supply of materials to the downstream molding process is interrupted, and the machine needs to be stopped to wait, which not only reduces the utilization rate of the equipment, but also affects the overall production efficiency. Summary of the Invention

[0004] To improve production efficiency, this application provides a pulp mixing system.

[0005] This application provides a pulp mixing system, which adopts the following technical solution:

[0006] A pulp mixing system, comprising:

[0007] The pretreatment unit is used to dissolve the substrate into semi-finished pulp;

[0008] The mixing unit includes two mixing tanks arranged side by side for receiving semi-finished pulp and additives; and

[0009] An additive addition unit is used to add additives into the mixing tank;

[0010] The mixing tanks are configured to alternate feeding, where one mixing tank feeds material to the downstream process while the other mixing tank receives semi-finished pulp and additives for mixing.

[0011] By adopting the above technical solution, this application breaks the traditional sequential operation mode of a single mixing tank requiring feeding, waiting, and pulp preparation by setting up two parallel and alternating mixing tanks. While one mixing tank is supplying pre-mixed pulp to the downstream forming process, the other mixing tank can simultaneously prepare a new batch of pulp, achieving parallel processing of pulp preparation and feeding. This ensures a continuous and stable supply of mixed pulp to downstream processes, avoiding downtime of downstream equipment due to waiting for pulp preparation, and improving the equipment utilization rate and overall production efficiency of the entire production system.

[0012] Optionally, the pretreatment unit includes a dissolving kettle and a transfer kettle; the dissolving kettle is used to dissolve the substrate, and the transfer kettle is used to receive and store the semi-finished pulp and transport the semi-finished pulp to the mixing unit through the first distribution valve group.

[0013] By adopting the above technical solution, even if the dissolving kettle is temporarily suspended due to feeding or maintenance, the semi-finished pulp stored in the transfer kettle can continue to be supplied to the mixing tank, ensuring that fluctuations in the upstream process do not easily affect the continuous operation of the mixing unit.

[0014] Optionally, the additive addition unit includes an additive tank and a second distribution valve group; the additive tank has at least one, and each additive tank selectively feeds the additive into one of the mixing tanks through its corresponding second distribution valve group.

[0015] Optionally, the additive addition unit includes an additive tank, a delivery valve assembly, a premix tank, a drive assembly, and a dispensing assembly;

[0016] The additive tank has at least one, and each additive tank feeds material to the premix tank through its corresponding conveying valve group; the premix tank is movably mounted on the upper part of the two mixing tanks by a drive assembly and can switch back and forth between the two mixing tanks; the spraying assembly is connected to the premix tank, and the premix tank sprays material into the mixing tank through the spraying assembly.

[0017] By adopting the above technical solution, the various additives can be initially mixed in the premixing tank to form a uniform mixture. Then, the driving component moves it above the two mixing tanks and sprays it through the spraying component. The moving premixing tank, in conjunction with the spraying component, can evenly distribute the additives throughout the mixing tank, creating favorable conditions for subsequent rapid mixing with the semi-finished pulp.

[0018] Optionally, the spraying assembly includes a feed pump and nozzles. Multiple nozzles are spaced apart along the vertical distribution direction of the mixing tank and are all connected to the feed pump. The feed pump is also connected to the outlet of the premix tank, so that the feed pump distributes the additives to each nozzle.

[0019] By adopting the above technical solution, multiple nozzles spaced at intervals along the width of the mixing tank are installed at the bottom of the premixing tank, and the premixed additives are simultaneously delivered to each nozzle using a feed pump. This achieves large-area, multi-point spraying of the additives along the width of the mixing tank. Compared to single-point injection, this spraying method allows the additives to have a good initial distribution upon entering the mixing tank, shortening the subsequent mixing time with the semi-finished pulp, thereby further improving the efficiency of the entire pulping process and making the mixing effect more uniform and stable.

[0020] Optionally, the drive assembly has two sets respectively arranged on opposite sides of the mixing tank. Each set of drive assemblies includes a walking chain, a sprocket and a rotation source. Multiple sprockets are arranged and rotatably connected to the mixing tank. The rotation source drives one of the sprockets to rotate. The walking chain meshes and conveys the mixture to the sprocket along the distribution direction of the mixing tank. The two ends of the premix tank are respectively installed on the walking chains of the two sets of drive assemblies and move with the walking chains.

[0021] Optionally, the walking chain has a sinking section and a tank-changing section; the sinking section corresponds one-to-one with the mixing tank and is located inside the mixing tank, while the tank-changing section is located above all the mixing tanks and the sinking section; the premixing tank is sprayed at the sinking section and moves from one mixing tank to another with the walking chain at the tank-changing section to achieve tank changing, and at the tank-changing section, the premixing tank is flipped compared to its state at the sinking section, so as to drive the mixing inside the premixing tank.

[0022] By adopting the above technical solution, in the settling section, the premixing tank is located inside the mixing pool, facilitating precise material application. In the pool-changing section, the premixing tank is lifted and crosses the mixing pool. During this process, the premixing tank itself flips, causing the additives inside to churn and mix. This achieves additive mixing without adding an extra power source, effectively improving the mixing effect. Furthermore, it eliminates the need for a separate stirring mechanism inside the premixing tank, simplifying the equipment structure and reducing the risk of material buildup due to internal mixing structures.

[0023] Optionally, a connecting seat is provided between the ends of the premix tank and the walking chain, the connecting seat is connected to the walking chain, and the end of the premix tank has a moving part that slides laterally in the connecting seat;

[0024] The premix tank is also provided with an abutment part at the end, and the inner wall of the mixing tank is provided with a guide seat for the abutment part to abut against. The surface of the guide seat for the abutment part to abut against undulates along the extension direction parallel to the sinking section.

[0025] When the premixing tank moves along the extension direction of the sinking section at the sinking section, the abutting part abuts against the surface of the guide seat, causing the premixing tank to move back and forth along the vertical mixing tank distribution direction with the undulation of the guide seat.

[0026] By adopting the above technical solution, when the premixing tank moves along the sinking section driven by the walking chain, its end contact part moves along the undulating guide seat, causing the premixing tank to slide laterally back and forth on the connecting seat through the moving part. This allows the premixing tank to perform lateral reciprocating motion while spraying longitudinally, thereby causing the spray trajectory of the nozzle to form a "bow"-shaped coverage path within the plane of the mixing tank, improving the uniformity and coverage of the additive spraying.

[0027] Optionally, the mixing tank can be adjusted to have a tension sprocket that meshes with the traveling chain. The tension sprocket causes the tank-changing section to bend, so that the premixing tank swings as it passes through the tank-changing section.

[0028] By adopting the above technical solution, the tensioning sprocket tensions the walking chain while causing the walking chain to bend. As a result, when the premixing tank passes through the bent tank exchange section, its running path will generate a certain degree of bumps and swaying, which will further aggravate the shaking and mixing of the additives in the tank and enhance the premixing effect.

[0029] Optionally, the delivery valve assembly includes a delivery pipeline, an on / off valve, and a flow meter; the delivery pipeline connects the additive tank and the premix tank; both the on / off valve and the flow meter are installed on the delivery pipeline, the opening and closing of the on / off valve is controlled by the flow meter, and both the on / off valve and the flow meter are close to the premix tank.

[0030] By adopting the above technical solution, the flow meter can monitor the flow rate of the additive through the pipeline in real time. When the accumulated flow rate reaches the preset value, it immediately sends a signal to control the on-off valve to close, thereby improving the accuracy of the additive dosage. Moreover, since both the on-off valve and the flow meter are close to the premix tank, it is less likely that the additive will remain in the pipeline and cause a decrease in accuracy.

[0031] In summary, this application includes at least one of the following beneficial effects:

[0032] 1. By setting up two parallel mixing tanks that alternately supply material, the pulp preparation and feeding processes are processed in parallel, achieving a continuous and stable supply of pulp and improving production efficiency;

[0033] 2. Through the movable premixing tank and the walking chain trajectory, not only is the precise delivery and uniform spraying of additives between multiple mixing tanks achieved, but the tumbling and swinging during the tank changing process are also used to premix the additives;

[0034] 3. By cooperating with the abutment part and the guide seat, the nozzle moves laterally and reciprocally during the spraying process, which improves the uniformity of the dispersion of additives in the mixing tank and optimizes the mixing efficiency and quality of the pulp. Attached Figure Description

[0035] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of this application;

[0036] Figure 2 This is a schematic diagram of the structure of the mixing tank and the premixing tank in Embodiment 2 of this application;

[0037] Figure 3 This is a schematic diagram of the structure of the premix tank and the dispensing assembly in Embodiment 2 of this application;

[0038] Figure 4 This is a schematic diagram of the structure of the premix tank and the walking chain in Embodiment 3 of this application;

[0039] Figure 5 yes Figure 4 Enlarged structural diagram at point A;

[0040] Figure 6 This is a top view of Embodiment 3 of this application;

[0041] Figure 7 This is a schematic diagram of the exploded structure of the moving part and the connecting seat in Embodiment 3 of this application.

[0042] Explanation of reference numerals in the attached drawings: 1. Mixing tank; 2. Dissolving vessel; 3. Transfer vessel; 4. First distribution valve assembly; 41. First distribution pipeline; 42. First valve assembly; 5. Additive tank; 6. Second distribution valve assembly; 61. Second distribution pipeline; 62. Second valve assembly; 7. Conveying valve assembly; 71. Conveying pipeline; 72. On / off valve; 73. Flow meter; 8. Premixing tank; 9. Drive assembly; 91. Walking chain; 92. Sprocket; 93. Rotation source; 10. Sprinkler assembly; 101. Feed pump; 102. Nozzle; 11. Sinking section; 12. Tank exchange section; 13. Connecting seat; 14. Moving part; 15. Abutment part; 16. Guide seat; 17. Tensioning sprocket; 18. Mounting plate; 19. Adjusting bracket; 20. Undulated surface; 21. Elastic element. Detailed Implementation

[0043] The following is in conjunction with the appendix Figure 1 To be continued Figure 7 This application will be described in further detail.

[0044] Example 1:

[0045] This application discloses a pulp mixing system. (Refer to...) Figure 1 The pulp mixing system includes a pretreatment unit, a mixing unit, and an additive addition unit. The pretreatment unit dissolves sugarcane pulp and other substrates into semi-finished pulp. The mixing unit receives the semi-finished pulp and additives and completes the mixing. The additive addition unit adds functional additives quantitatively to the mixing unit. The units work together to achieve continuous pulp preparation.

[0046] Specifically, the pretreatment unit includes a dissolving tank 2 and a transfer tank 3. The dissolving tank 2 is a vessel equipped with a stirring function. The substrate and water are added to the dissolving tank 2 according to a preset ratio, and then dissolved by stirring to form a uniform semi-finished pulp. The transfer tank 3 is connected to the discharge end of the dissolving tank 2 via a pipeline equipped with a pump and valves. The function of the transfer tank 3 is to receive and store the semi-finished pulp delivered from the dissolving tank 2, and to temporarily buffer the semi-finished pulp to ensure continuous supply to the mixing unit. The discharge end of the transfer tank 3 is connected to the mixing unit, and can quantitatively deliver semi-finished pulp to the mixing tank 1 according to the operational needs of the mixing unit. The structures of the dissolving tank 2 and the transfer tank 3 are common existing structures and will not be described in detail here.

[0047] The mixing unit includes two mixing tanks 1 arranged side by side. The two mixing tanks 1 have the same structure and specifications. They are both rectangular tanks with open tops. A stirring mechanism is provided in the tank. The stirring mechanism can be a paddle stirrer or a spiral stirrer. In this embodiment, a paddle stirrer installed on the side of the mixing tank 1 is preferred. The stirrer structure is a common existing technology, which will not be described in detail here and is not shown in the figure.

[0048] The transfer vessel 3 is connected to the two mixing tanks 1 via the first distribution valve group 4 and supplies material to the two mixing tanks 1. The first distribution valve group 4 includes a first distribution pipeline 41 and a first valve assembly 42. The first valve assembly 42 is preferably a combination of a three-way valve or two shut-off valves, used to control the selective entry of semi-finished pulp into one of the two mixing tanks 1.

[0049] The two mixing tanks 1 are configured to operate in an alternating feeding mode. When one mixing tank 1 completes pulp mixing, it supplies the mixed pulp to the downstream forming process. At the same time, the other mixing tank 1 simultaneously receives the semi-finished pulp supplied by the pre-processing unit and the additives supplied by the additive addition unit, and performs the mixing operation. After the pulp supply in the feeding mixing tank 1 is completed, the two mixing tanks 1 switch operating states to achieve continuous output of mixed pulp and avoid downtime in downstream processes.

[0050] The additive addition unit includes an additive tank 5 and a second distribution valve group 6. There is at least one additive tank 5, and multiple tanks can be set according to process requirements to store different types of additives. Each additive tank 5 is a sealed storage tank with a discharge port at the bottom.

[0051] Each additive tank 5 corresponds to a second distribution valve group 6, with the discharge end of each additive tank 5 connected to its corresponding second distribution valve group 6. The structure of the second distribution valve group 6 is similar to that of the first distribution valve group 4, including a second distribution pipeline 61 and a second valve assembly 62. The first valve assembly 42 is preferably a combination of a three-way valve or two shut-off valves, used to control the selective entry of additives into one of the two mixing tanks 1 to adapt to the additive addition requirements of alternating operation of the two mixing tanks 1.

[0052] The implementation principle of a pulp mixing system according to an embodiment of this application is as follows: After the substrate is dissolved into semi-finished pulp in the dissolving kettle 2, it is transported to the transfer kettle 3 for buffering. The transfer kettle 3 delivers semi-finished pulp to one of the mixing tanks 1 through the first distribution valve group 4, while the additive tank 5 delivers the corresponding additives to the mixing tank 1 through the second distribution valve group 6. The stirring mechanism is activated to mix the pulp. After mixing is completed, the mixing tank 1 feeds downstream. During the feeding process, the transfer kettle 3 and the additive tank 5 deliver semi-finished pulp and additives to another mixing tank 1 to complete the mixing of the next batch of pulp. The two mixing tanks 1 alternately complete the mixing and feeding operations to achieve continuous output of mixed pulp.

[0053] Example 2:

[0054] Because the additives are transported via pipelines, they tend to accumulate in one place when they enter the mixing tank 1, requiring a longer mixing time to fully integrate them with the pulp. To further improve production efficiency, this application discloses a pulp mixing system. The difference between this embodiment and Embodiment 1 lies in the structure and operation mode of the additive addition unit. The structure, connection relationship, and operation mode of the pretreatment unit and mixing unit are consistent with Embodiment 1, and will not be repeated here.

[0055] Reference Figure 2 and Figure 3 In this embodiment, the additive addition unit includes an additive tank 5 (not in...). Figure 2 The system includes a conveying valve assembly 7, a premixing tank 8, a drive assembly 9, and a dispensing assembly 10. The additive tank 5 stores various additives. The conveying valve assembly 7 enables quantitative feeding of the additive tank 5 to the premixing tank 8. The premixing tank 8 receives and premixes various additives. The drive assembly 9 drives the premixing tank 8 to move alternately above the two mixing pools 1. The dispensing assembly 10 ensures uniform dispensing of the additives from the premixing tank 8 into the mixing pool 1.

[0056] Specifically, regarding the additive tank 5 and the conveying valve assembly 7, the additive tank 5 has at least one component, and the structure of each additive tank 5 is consistent with that in Embodiment 1. Each additive tank 5 stores different types of additives, and each additive tank 5 conveys materials to the premixing tank 8 through its corresponding conveying valve assembly 7. The conveying valve assembly 7 includes a conveying pipe 71, an on / off valve 72, and a flow meter 73. The conveying pipe 71 is a flexible hose, with both ends connected to the outlet of the additive tank 5 and the inlet of the premixing tank 8, respectively, to achieve directional conveying of the additives. The on / off valve 72 and the flow meter 73 are both installed on the conveying pipe 71, and both are arranged close to the premixing tank 8. The flow meter 73 is a liquid flow meter 73, which can detect the flow rate and cumulative conveying amount of the additives in the conveying pipe 71 in real time. The on / off valve 72 is a solenoid directional valve, and its opening and closing action is controlled by the electrical signal of the flow meter 73. When the cumulative conveying amount detected by the flow meter 73 reaches a preset value, it automatically sends an electrical signal to control the on / off valve 72 to close, thereby achieving quantitative conveying to the premixing tank 8.

[0057] The premixing tank 8 is a sealed tank with multiple feed inlets at the top corresponding to each conveying valve group 7, and a main discharge port at the bottom. There are no moving parts such as a stirring shaft inside the tank, and the inner wall of the tank is smooth to reduce material buildup. Both ends of the premixing tank 8 are connected to the drive assembly 9, allowing it to move with the drive assembly 9 across the two mixing tanks 1. During movement, the tank is thoroughly premixed by tilting and shaking.

[0058] The drive assembly 9 has two sets, which are respectively arranged symmetrically on opposite sides of the mixing tank 1 along its length and operate synchronously. Each drive assembly 9 includes a walking chain 91, sprockets 92, and a rotation source 93. Multiple sprockets 92 are provided and rotatably connected to a mounting plate 18, which is fixed to the inner wall of the mixing tank 1, so that the sprockets 92 are distributed on the side walls and top of the mixing tank 1. The rotation source 93 is a geared motor, which is fixed to the mounting plate 18 and drives one of the sprockets 92 to rotate, serving as the driving sprocket. The walking chain 91 meshes with and transmits along the distribution direction of the mixing tank 1 to all the sprockets 92, and the rotation of the driving sprocket drives the walking chain 91 to move. The two ends of the premixing tank 8 are respectively installed on the walking chains 91 of the two sets of drive assemblies 9, and move synchronously with the movement of the walking chains 91.

[0059] More specifically, the walking chain 91 forms segmented tracks called sinking section 11 and pool-changing section 12. The sinking section 11 corresponds one-to-one with the mixing pool 1, and extends inside the corresponding mixing pool 1 in a direction parallel to the distribution direction of the two mixing pools 1. The pool-changing section 12 is located above and opposite the two mixing pools 1, and both ends of the pool-changing section 12 bend downwards and connect to the corresponding sinking section 11 of the two mixing pools 1, forming a continuous transmission track of sinking, pool-changing, and sinking again.

[0060] The use of the premixing tank 8 is described by referring to the two mixing tanks 1 as the first tank and the second tank, respectively. Specifically, when the premixing tank 8 dispenses material into the first tank, the traveling chain 91 drives the premixing tank 8 to move back and forth along the trajectory of the corresponding sinking section 11 in the first tank, so that the premixing tank 8 is positioned closer to the liquid surface in the mixing tank 1 and is less likely to spill the additives outside the tank. After the premixing tank 8 dispenses material into the first tank, the additive tank 5 first adds the additives required for the second tank into the premixing tank 8. Then, the traveling chain 91 drives the premixing tank 8 from the sinking section 11 to the tank exchange section 12, and moves along the trajectory of the tank exchange section 12 to another sinking section 11, so that the premixing tank 8 dispenses material relative to the second tank. It should be noted that the premixing tank 8 is overturned during the process of moving from one sinking section 11 to the tank exchange section 12, and from the tank exchange section 12 to the other sinking section 11, so that the additives in the premixing tank 8 are turbulent and disturbed during the overturning process to achieve premixing.

[0061] Furthermore, a tension sprocket 17 that meshes with the traveling chain 91 is mounted on the mounting plate 18. The tension sprocket 17 is mounted on the upper part of the mounting plate 18 via an adjusting bracket 19 and is located above the tank changing section 12. The adjusting bracket 19 adjusts the installation height of the tension sprocket 17 through the cooperation of a screw and a nut, causing the tank changing section 12 to bend downwards. When the traveling chain 91 drives the premixing tank 8 through the tank changing section 12, the bending trajectory causes the premixing tank 8 to swing, further agitating and mixing the additives inside the premixing tank 8.

[0062] The spraying assembly 10 is connected to the bottom outlet of the premixing tank 8 and includes a feed pump 101 and nozzles 102. The feed end of the feed pump 101 is connected to the outlet of the premixing tank 8, and the outlet end is connected to multiple nozzles 102 through branch pipes. Multiple nozzles 102 are spaced apart along the vertical distribution direction of the mixing tank 1, all facing the interior of the mixing tank 1. After the feed pump 101 is started, it can evenly distribute the premixed additives in the premixing tank 8 to each nozzle 102. By spraying the additives into the mixing tank 1 simultaneously through multiple nozzles 102, the additives are evenly distributed in the mixing tank 1, improving the mixing efficiency with the semi-finished pulp.

[0063] The operating status of the spraying assembly 10 is matched with the position of the premixing tank 8. When the premixing tank 8 is at the sinking section 11, the spraying assembly 10 is activated, with the nozzle 102 pointing downwards, and quantitatively adding additives into the corresponding mixing tank 1. When the premixing tank 8 leaves the sinking section 11, the spraying assembly 10 stops operating.

[0064] Example 3:

[0065] The difference between this embodiment and Embodiment 2 is that the installation method between the premix tank 8 and the walking chain 91 is different.

[0066] Reference Figure 4 and Figure 5 Specifically, in this embodiment, connecting seats 13 are provided at both ends of the premix tank 8 and between the premix tank 8 and the walking chain 91, and the connecting seats 13 are fixedly connected to the walking chain 91. The end of the premix tank 8 has a movable part 14, which is a boss structure and can slide laterally in the sliding groove opened in the connecting seat 13 along the distribution direction of the nozzles 102, so as to realize the sliding fit between the premix tank 8 and the connecting seat 13.

[0067] The end of the premix tank 8 is also provided with an abutment part 15, which is a rolling structure and can be a ball or a roller. The inner wall of the mounting plate 18 is fixed with a guide seat 16, and the surface of the guide seat 16 for the abutment part 15 to abut is an undulating surface 20. The undulating surface 20 is arranged along the extension direction of the parallel sinking section 11, and the undulating surface 20 undulates back and forth along its own extension direction toward the plate surface of the mounting plate 18 and away from it.

[0068] Reference Figure 6 The undulating surfaces 20 of the two guide seats 16 on both sides of the single mixing pool 1 are opposite each other, and the undulation direction and angle of the two opposite undulating surfaces 20 are the same except for the end away from the other mixing pool 1. The ends of the two opposite undulating surfaces 20 away from the other mixing pool 1 are inclined towards the inner wall of the mixing pool 1 in the direction away from the other mixing pool 1 to form an flared shape, which facilitates the introduction of the abutment part 15 between the two undulating surfaces 20.

[0069] Reference Figure 4When the premixing tank 8 moves along the extension direction of the sinking section 11 at the sinking section 11, the rolling wheel of the abutting part 15 abuts against the undulating surface 20 of the guide seat 16. The undulating surface 20 drives the premixing tank 8 to move back and forth on the connecting seat 13 through the moving part 14 along the direction perpendicular to the distribution of the two mixing tanks 1. That is, while the premixing tank 8 is sprinkling material into the mixing tank 1, it also makes a reciprocating translational movement. With the interval arrangement of multiple nozzles 102, the uniformity of the additives in the mixing tank 1 is further improved, so that the additives and semi-finished pulp are mixed more fully.

[0070] Reference Figure 7 Furthermore, an elastic element 21 is connected between the moving part 14 and the connecting seat 13. The elastic element 21 can be an elastic structure such as a spring or a sheet. The elastic force of the elastic element 21 gives the moving part 14 a tendency to move away from the connecting seat 13. When the premixed tank 8 is not engaged with the guide seat 16, the elastic elements 21 at both ends keep the premixed tank 8 in a centered state.

[0071] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A pulp mixing system, characterized in that, include: The pretreatment unit is used to dissolve the substrate into semi-finished pulp; The mixing unit includes two mixing tanks (1) arranged side by side, which are used to receive semi-finished pulp and additives; as well as An additive addition unit for adding additives to a mixing tank (1) includes an additive tank (5), a conveying valve group (7), a premixing tank (8), a drive assembly (9), and a spraying assembly (10). The additive tank (5) has at least one additive tank, and each additive tank (5) conveys material to the premixing tank (8) through its corresponding conveying valve group (7). The premixing tank (8) is movably disposed on the upper part of two mixing tanks (1) through the drive assembly (9) and can switch back and forth between the two mixing tanks (1). The spraying assembly (10) is connected to the premixing tank (8), and the premixing tank (8) sprays material into the mixing tank (1) through the spraying assembly (10). The mixing tank (1) is configured to alternate feeding, wherein when one mixing tank (1) feeds to the downstream process, the other mixing tank (1) receives the semi-finished pulp and additives for mixing. The drive assembly (9) has two sets respectively arranged on opposite sides of the mixing tank (1). Each set of drive assemblies (9) includes a walking chain (91), a sprocket (92) and a rotation source (93). Multiple sprockets (92) are arranged and rotatably connected to the mixing tank (1). The rotation source (93) drives one of the sprockets (92) to rotate. The walking chain (91) meshes and conveys along the distribution direction of the mixing tank (1) to the sprocket (92). The two ends of the premix tank (8) are respectively installed on the walking chains (91) of the two sets of drive assemblies (9) and move with the walking chains (91). The walking chain (91) has a sinking section (11) and a tank-changing section (12); the sinking section (11) corresponds one-to-one with the mixing tank (1) and is located inside the mixing tank (1), and the tank-changing section (12) is located above all the mixing tanks (1) and the sinking section (11); the premixing tank (8) is sprayed at the sinking section (11) and moves from one mixing tank (1) to another mixing tank (1) with the walking chain (91) at the tank-changing section (12) to achieve tank changing, and the premixing tank (8) is flipped at the tank-changing section (12) compared to its state at the sinking section (11) to drive the mixing inside the premixing tank (8).

2. The pulp mixing system according to claim 1, characterized in that: The pretreatment unit includes a dissolving kettle (2) and a transfer kettle (3); the dissolving kettle (2) is used to dissolve the substrate, and the transfer kettle (3) is used to receive and store the semi-finished pulp and transport the semi-finished pulp to the mixing unit through the first distribution valve group (4).

3. The pulp mixing system according to claim 1, characterized in that: The spraying assembly (10) includes a feed pump (101) and nozzles (102). Multiple nozzles (102) are spaced apart along the vertical mixing tank (1) and are all connected to the feed pump (101). The feed pump (101) is also connected to the outlet of the premix tank (8) so that the feed pump (101) distributes the additives to each nozzle (102).

4. The pulp mixing system according to claim 1, characterized in that: A connecting seat (13) is provided at both ends of the premix tank (8) and the walking chain (91). The connecting seat (13) is connected to the walking chain (91). The end of the premix tank (8) has a moving part (14) that slides laterally in the connecting seat (13). The premix tank (8) is also provided with an abutment part (15) at the end. The mixing tank (1) is provided with a guide seat (16) for the abutment part (15) to abut. The surface of the guide seat (16) for the abutment part (15) to abut is undulating along the extension direction of the parallel sinking section (11). When the premix tank (8) moves along the extension direction of the sinking section (11) at the sinking section (11), the abutting part (15) abuts against the surface of the guide seat (16), causing the premix tank (8) to move back and forth along the distribution direction of the vertical mixing tank (1) with the undulation of the guide seat (16).

5. A pulp mixing system according to claim 1, characterized in that: The mixing tank (1) is adjustablely equipped with a tension sprocket (17) that meshes with the walking chain (91). The tension sprocket (17) causes the tank changing section (12) to bend, so that the premixing tank (8) swings when it passes through the tank changing section (12).

6. A pulp mixing system according to claim 1, characterized in that: The delivery valve assembly (7) includes a delivery pipeline (71), an on / off valve (72), and a flow meter (73); the delivery pipeline (71) is connected between the additive tank (5) and the premix tank (8); the on / off valve (72) and the flow meter (73) are both installed on the delivery pipeline (71), the opening and closing of the on / off valve (72) is controlled by the flow meter (73), and the on / off valve (72) and the flow meter (73) are both close to the premix tank (8).

Images