Continuous cooking device for wood pulp production
By designing a continuous cooking device in wood pulp production, and using preheating boxes and steam paddles to steam preheat the wood chips, the problem of wood chips entering the cooking pot without preheating is solved, improving the cooking efficiency and reducing energy consumption.
Patent Information
- Application Number
- CN202520646296.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-08
- Publication Date
- 2025-05-27
- Estimated Expiration
- 2035-04-08
AI Technical Summary
During the process of steaming the existing wood chips into wood pulp, the wood chips directly enter the cooking pot without effective preheating, making it difficult for the cooking liquid to penetrate, prolong the cooking time, reduce production efficiency and increase energy consumption.
A continuous cooking device is designed, including a preheating box and steam paddles, which preheat wood chips by steam, so that they are more likely to be penetrated by the cooking liquid during cooking, thereby improving the cooking efficiency and reducing energy consumption.
Steam preheating the wood chips through the preheating box significantly improves the cooking efficiency of the wood chips, shortens the cooking time, reduces energy consumption, and improves the quality of wood pulp.
Smart Images
Figure CN222908404U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of wood pulp processing equipment, in particular to a continuous cooking device for wood pulp production. Background Technique
[0002] Cooking wood chips into wood pulp is a key link in the fields of papermaking and biomass conversion. In this process, wood chips are used as raw materials, which are put into a cooker and a specific cooking agent is added, such as a sulfate cooking liquor composed of caustic soda and sodium sulfide, so that the cooking agent reacts fully with the wood chips, decomposes lignin, separates cellulose, and forms wood pulp.
[0003] In the existing process of cooking wood chips into wood pulp, the wood chips often directly enter the cooking pot without effective preheating. Since the initial state of the wood chips is hard and the structure is dense, it causes the cooking liquor to be difficult to quickly and fully penetrate into the interior of the wood chips during the cooking process, greatly prolonging the cooking time, not only reducing the production efficiency, but also causing a large amount of energy consumption. Even if some equipment is equipped with a preheating device, its preheating method is relatively single, and the preheating effect is not satisfactory. During the preheating process, the heat distribution is uneven, and the wood chips cannot be evenly preheated and softened in each part, seriously affecting the uniformity and quality of subsequent cooking. Content of the Utility Model
[0004] The purpose of the utility model is to provide a continuous cooking device for wood pulp production, which can effectively solve the problems in the background technique.
[0005] To achieve the above purpose, the technical solution adopted by the utility model is as follows:
[0006] A continuous cooking device for wood pulp production includes a base. A clear water supply device is fixedly installed on the base. A cooking pot is fixedly installed on the base near the clear water supply device. A first support is fixedly installed on the base near the cooking pot. A preheating box is fixedly installed inside the first support. A second support is fixedly installed on the first support. A motor is fixedly installed on the second support. A rotating shaft is fixedly installed at the output end of the motor. A plurality of steam distribution blades are fixedly installed on the outer side of the rotating shaft. A third support is fixedly installed at the lower part inside the preheating box. A shaft seat is fixedly installed on the third support. A spiral conveyor blade is arranged at the lower end of the shaft seat, and the central shaft of the spiral conveyor blade is rotatably installed inside the shaft seat. The upper end of the central shaft of the spiral conveyor blade is fixedly installed with a wheel disc. A plurality of limit blocks are movably installed inside the wheel disc. A connecting cover is inserted and installed on the outer side of the wheel disc, and the upper end of the connecting cover is fixedly installed at the lower end of the rotating shaft. A rotary joint is rotatably installed on the outer side of the rotating shaft near the connecting cover.
[0007] As a further preferred embodiment of the present utility model, a third support is fixedly installed at the lower end of the cooking pot, a stirring device is fixedly installed inside the cooking pot, a feeding pneumatic door is movably installed on the cooking pot, and an exhaust pipe is fixedly installed on the cooking pot near the feeding pneumatic door, and one end of the exhaust pipe extends into the cooking pot. The cooking pot can realize the cooking function of wood chips, and the setting of the feeding pneumatic door facilitates the discharge of the generated steam through the exhaust pipe when cooking the wood chips.
[0008] As a further preferred embodiment of the present utility model, a second screw conveyor is fixedly installed at the lower end of the preheating box, and a fixed pipe is fixedly installed inside the preheating box.
[0009] As a further preferred embodiment of the present utility model, the inside of the rotating shaft is of a hollow structure, and a plurality of exhaust pipes are fixedly installed on the outer side of the rotating shaft. The exhaust pipes are communicated with the inner cavity of the steam distribution paddle blades, and a plurality of exhaust holes are opened on both the upper end face and the lower end face of the steam distribution paddle blades.
[0010] As a further preferred embodiment of the present utility model, a connecting pipe is fixedly connected between the fixed pipe and the rotary joint, and one end of the fixed pipe far away from the connecting pipe is fixedly connected to one end of the exhaust pipe through a pipeline. The steam distribution paddle blades, the exhaust pipes, the rotating shaft, the rotary joint, the connecting pipe, and the fixed pipe are in communication with each other through channels. The steam discharged from the exhaust pipe can be shunted into a plurality of steam distribution paddle blades through the cooperation of the pipeline, the fixed pipe, the connecting pipe, the rotary joint, and the rotating shaft, so as to preheat the wood chips temporarily stored in the preheating box.
[0011] As a further preferred embodiment of the present utility model, a plurality of pushing blocks are fixedly installed on the inner top of the connecting cover, and one end face of one of the pushing blocks is a bevel, and the other end face is a right-angled face.
[0012] As a further preferred embodiment of the present utility model, a plurality of limiting grooves are opened on the upper end of the shaft seat, and the limiting grooves are arranged in a ring along the contour of the upper end of the shaft seat.
[0013] As a further preferred embodiment of the present utility model, a plurality of installation grooves are opened on the upper end of the wheel disc. The installation grooves are internally threaded with limiting screws. The limiting blocks are inserted into the installation grooves and limited by the limiting screws. A compression spring is also sleeved outside the limiting screws. One end of the compression spring abuts against the bottom of the limiting block, and the other end of the compression spring abuts against the inner bottom of the installation groove. A limiting rod is also fixedly installed at the bottom of the limiting block near the limiting screw. The lower end of the limiting rod is inserted into a through hole in the inner bottom of the installation groove. A plurality of limiting blocks that can be unidirectionally force-collapsed are arranged inside the wheel disc, which can cooperate with a plurality of pushing blocks on the inner top of the connecting cover to realize the one-way rotation of the screw conveyor blades, so as not to cause the rotation of the screw conveyor blades and affect the feeding when preheating the wood chips in the preheating box with steam.
[0014] Compared with the prior art, the utility model has the following beneficial effects:
[0015] In the utility model, when steaming wood chips in a steaming pot, the wood chips temporarily stored in the preheating box can be preheated and softened through the exhaust pipe, fixed pipe, connecting pipe, rotating shaft and steam distribution paddle, so as to improve the subsequent steaming efficiency of the wood chips and reduce energy consumption. At the same time, the preheating box feeds materials into the steaming pot through the second screw conveyor, and the cooked wood pulp in the steaming pot is fed into the dryer through the first screw conveyor. The whole device has high steaming efficiency and low energy consumption for wood chips. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 is a schematic diagram of the main structure of the utility model;
[0017] Figure 2 is a sectional view of the preheating box of the utility model;
[0018] Figure 3 is Figure 2 an enlarged view of part A in
[0019] Figure 4 is Figure 2 an enlarged view of part B in
[0020] Figure 5 is a schematic diagram of the wheel disc structure of the utility model;
[0021] Figure 6 is a sectional view of the shaft seat and wheel disc of the utility model;
[0022] Figure 7 is a schematic diagram of the connection cover structure of the utility model.
[0023] In the figure: 1. Base; 2. Clean water supply device; 3. Steaming pot; 4. First screw conveyor; 5. Stirring device; 6. Inlet pneumatic door; 7. Exhaust pipe; 8. First support; 9. Preheating box; 10. Second support; 11. Motor; 12. Rotating shaft; 13. Steam distribution paddle; 14. Third support; 15. Shaft seat; 16. Screw conveyor paddle; 17. Wheel disc; 18. Limit block; 19. Rotary joint; 20. Connection cover; 21. Fixed pipe; 22. Connecting pipe; 23. Exhaust pipe; 24. Exhaust hole; 25. Limit groove; 26. Installation groove; 27. Compression spring; 28. Limit rod; 29. Push block; 30. Second screw conveyor; 31. Limit screw. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0024] In order to make the technical means, creative features, achieved purposes and functions of the utility model easy to understand, the utility model will be further described below in conjunction with specific embodiments.
[0025] As Figures 1 - 7 shown, a continuous cooking device for wood pulp production provided by the utility model includes a base 1, a fresh water supply device 2 fixedly installed on the base 1, a cooking pot 3 fixedly installed on the base 1 near the fresh water supply device 2, a first support 8 fixedly installed on the base 1 near the cooking pot 3, a preheating box 9 fixedly installed inside the first support 8, a second support 10 fixedly installed on the first support 8, a motor 11 fixedly installed on the second support 10, a rotating shaft 12 fixedly installed at the output end of the motor 11, a plurality of steam distribution paddles 13 fixedly installed on the outer side of the rotating shaft 12, a third support 14 fixedly installed at the lower part inside the preheating box 9, a shaft seat 15 fixedly installed on the third support 14, a spiral conveyor paddle 16 arranged at the lower end of the shaft seat 15, and the central shaft of the spiral conveyor paddle 16 is rotatably installed inside the shaft seat 15. The upper end of the central shaft of the spiral conveyor paddle 16 is fixedly installed with a disc 17, a plurality of limit blocks 18 are movably installed inside the disc 17, a connecting cover 20 is inserted and installed on the outer side of the disc 17, the upper end of the connecting cover 20 is fixedly installed at the lower end of the rotating shaft 12, and a rotary joint 19 is rotatably installed on the outer side of the rotating shaft 12 near the connecting cover 20.
[0026] As Figure 1 shown, a third support 14 is fixedly installed at the lower end of the cooking pot 3, a stirring device 5 is fixedly installed inside the cooking pot 3, a feeding pneumatic door 6 is movably installed on the cooking pot 3, an exhaust pipe 7 is fixedly installed on the cooking pot 3 near the feeding pneumatic door 6, and one end of the exhaust pipe 7 extends into the cooking pot 3. The cooking pot 3 can realize the cooking function of wood chips, and the setting of the feeding pneumatic door 6 facilitates the discharge of the generated steam through the exhaust pipe 7 when cooking the wood chips.
[0027] As Figures 2 - 7As shown in the figure, a second screw conveyor 30 is fixedly installed at the lower end of the preheating box 9. A fixed pipe 21 is fixedly installed inside the preheating box 9. The inside of the rotating shaft 12 is of a hollow structure, and a plurality of exhaust pipes 23 are fixedly installed on the outer side of the rotating shaft 12. The exhaust pipes 23 communicate with the inner cavity of the steam distribution paddle 13. A plurality of exhaust holes 24 are formed in both the upper end face and the lower end face of the steam distribution paddle 13. A connecting pipe 22 is fixedly connected between the fixed pipe 21 and the rotary joint 19. One end of the fixed pipe 21 away from the connecting pipe 22 is fixedly connected to one end of the exhaust pipe 7 through a pipeline. The channels between the steam distribution paddle 13, the exhaust pipes 23, the rotating shaft 12, the rotary joint 19, the connecting pipe 22, and the fixed pipe 21 are connected. The steam discharged from the exhaust pipe 7 can be split into a plurality of steam distribution paddles 13 through the cooperation of the pipeline, the fixed pipe 21, the connecting pipe 22, the rotary joint 19, and the rotating shaft 12, so as to preheat the wood chips temporarily stored in the preheating box 9. A plurality of push blocks 29 are fixedly installed at the top inside the connecting cover 20. One end face of the push block 29 is a bevel, and the other end face is a right-angle face. A plurality of limiting grooves 25 are formed at the upper end of the shaft seat 15, and the limiting grooves 25 are arranged in a ring along the contour of the upper end of the shaft seat 15. A plurality of installation grooves 26 are formed at the upper end of the wheel disc 17. A limiting screw 31 is threadedly connected inside the installation groove 26. The limiting block 18 is inserted into the installation groove 26 and limited by the limiting screw 31. A compression spring 27 is also sleeved outside the limiting screw 31. One end of the compression spring 27 abuts against the bottom of the limiting block 18, and the other end of the compression spring 27 abuts against the inner bottom of the installation groove 26. A limiting rod 28 is fixedly installed near the limiting screw 31 at the bottom of the limiting block 18. The lower end of the limiting rod 28 is inserted into the through hole at the inner bottom of the installation groove 26. A plurality of limiting blocks 18 that can be collapsed under unidirectional force are arranged inside the wheel disc 17, which can cooperate with the plurality of push blocks 29 at the top inside the connecting cover 20 to realize the unidirectional rotation of the screw conveyor blade 16, so as not to cause the rotation of the screw conveyor blade 16 when preheating the wood chips in the preheating box 9 with steam, thus affecting the feeding.
[0028] It should be noted that the present utility model is a continuous cooking device for wood pulp production. When the wood chips are being cooked in the cooking pot 3, the feeding pneumatic door 6 is in a closed state, so that part of the high-pressure steam in the cooking pot 3 is transported through the exhaust pipe 7 and the pipeline to the fixed pipe 21, and then through the fixed pipe 21, the connecting pipe 22, the rotary joint 19, and the rotating shaft 12, the steam is shunted and transported to a plurality of steam distribution paddle blades 13, and the steam is discharged through a plurality of exhaust holes 24 on the upper and lower end faces of the steam distribution paddle blades 13. Meanwhile, the output end of the motor 11 drives the rotating shaft 12 to rotate synchronously, so that the rotating shaft 12 drives a plurality of steam distribution paddle blades 13 to rotate in the wood chips in the preheating box 9, thus realizing uniform preheating and softening of the wood chips in the preheating box 9. Synchronously, when the rotating shaft 12 rotates, it will drive the connecting cover 20 to rotate. The inclined surfaces of the plurality of pushing blocks 29 on the inner top of the connecting cover 20 are sequentially pressed against the inclined surfaces of the corresponding limiting blocks 18, so that the limiting blocks 18 are pressed down into the installation groove 26, so that the pushing blocks 29 can pass through the limiting blocks 18 without affecting the movement of the wheel disc 17. And when the limiting blocks 18 are pressed down, they will drive the limiting rods 28 to move downward. Then, the lower end of the limiting rod 28 passes through the through hole at the bottom of the inner part of the installation groove 26 and is inserted into the limiting groove 25 to limit the rotation of the wheel disc 17. Thus, the rotation of the spiral conveying paddle blade 16 is restricted by restricting the rotation of the wheel disc 17. When the wood pulp in the cooking pot 3 is discharged through the first screw conveyor 4, the feeding pneumatic door 6 is opened. Synchronously, the second screw conveyor 30 is also opened. And the motor 11 rotates in the reverse direction, so that the output end of the motor 11 drives the rotating shaft 12 to rotate in the reverse direction. Then, the rotating shaft 12 drives the connecting cover 20 to flip. And the right-angle surfaces of the plurality of pushing blocks 29 on the inner top of the connecting cover 20 are in contact with the right-angle surfaces of the limiting blocks 18 to push the wheel disc 17 to rotate. Thus, the wheel disc 17 can drive the spiral conveying paddle blade 16 to rotate in the preheating box 9 and the feeding pipe at the lower end of the preheating box 9, so as to transport the preheated wood chips in the preheating box 9 to the second screw conveyor 30, and then the second screw conveyor 30 transports the preheated wood chips to the cooking pot 3 through the feeding pneumatic door 6 for cooking.
[0029] The above shows and describes the basic principles, main features and advantages of the present utility model. Those skilled in the art of this industry should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principle of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.
Claims
1. A continuous cooking device for wood pulp production, characterized in that: The invention comprises a base (1), wherein a clean water supply device (2) is fixedly mounted on the base (1), a cooking pot (3) is fixedly mounted on the base (1) near the clean water supply device (2), a first bracket (8) is fixedly mounted on the base (1) near the cooking pot (3), a preheating box (9) is fixedly mounted inside the first bracket (8), a second bracket (10) is fixedly mounted on the first bracket (8), a motor (11) is fixedly mounted on the second bracket (10), a rotating shaft (12) is fixedly mounted on the output end of the motor (11), a plurality of steam distribution blades (13) are fixedly mounted on the outer side of the rotating shaft (12), and a preheating box (9) is fixedly mounted at the lower part of the preheating box (9). A third bracket (14) is fixedly installed, and a shaft seat (15) is fixedly installed on the third bracket (14). A screw conveying blade (16) is arranged at the lower end of the shaft seat (15), and the central axis of the screw conveying blade (16) is rotatably installed in the shaft seat (15). A wheel disc (17) is fixedly installed at the upper end of the central axis of the screw conveying blade (16), and a plurality of limit blocks (18) are movably installed in the wheel disc (17). A connecting cover (20) is inserted and installed on the outer side of the wheel disc (17), and the upper end of the connecting cover (20) is fixedly installed on the lower end of the rotating shaft (12). A rotating joint (19) is rotatably installed on the outer side of the rotating shaft (12) near the connecting cover (20).
2. A continuous cooking device for wood pulp production according to claim 1, characterized in that: A third bracket (14) is fixedly mounted on the lower end of the cooking pot (3), a stirring device (5) is fixedly mounted inside the cooking pot (3), a material inlet pneumatic door (6) is movably mounted on the cooking pot (3), an exhaust pipe (7) is fixedly mounted on the cooking pot (3) near the material inlet pneumatic door (6), and one end of the exhaust pipe (7) extends into the cooking pot (3).
3. A continuous cooking device for wood pulp production according to claim 1, characterized in that: A second screw conveyor (30) is fixedly mounted on the lower end of the preheating box (9), and a fixed pipe (21) is fixedly mounted on the inner side of the preheating box (9).
4. A continuous cooking device for wood pulp production according to claim 3, characterized in that: The interior of the rotating shaft (12) is a hollow structure, and a plurality of exhaust pipes (23) are fixedly mounted on the outside of the rotating shaft (12), the exhaust pipes (23) being in communication with the inner cavity of the steam distribution blade (13), and a plurality of exhaust holes (24) are provided on both the upper end surface and the lower end surface of the steam distribution blade (13).
5. A continuous cooking device for wood pulp production according to claim 4, characterized in that: A connecting pipe (22) is fixedly connected between the fixed pipe (21) and the rotary joint (19), and one end of the fixed pipe (21) away from the connecting pipe (22) is fixedly connected to one end of an exhaust pipe (7) via a pipeline, and passages are connected among the steam distribution blades (13), the exhaust pipe (23), the rotating shaft (12), the rotary joint (19), the connecting pipe (22), and the fixed pipe (21).
6. A continuous cooking device for wood pulp production according to claim 1, characterized in that: A plurality of push blocks (29) are fixedly mounted on the top of the connection cover (20), and one end surface of the push block (29) is an inclined surface, and the other end surface is a right-angle surface.
7. A continuous cooking device for wood pulp production according to claim 6, characterized in that: A plurality of limiting grooves (25) are provided at the upper end of the shaft seat (15), and the limiting grooves (25) are arranged in a ring shape along the contour of the upper end of the shaft seat (15).
8. A continuous cooking device for wood pulp production according to claim 7, characterized in that: A plurality of mounting grooves (26) are provided at the upper end of the wheel disc (17). The mounting grooves (26) are internally threadedly connected to limit screws (31). The limit block (18) is inserted into the mounting grooves (26) and is limited by the limit screws (31). A compression spring (27) is also sleeved on the outer side of the limit screw (31). One end of the compression spring (27) abuts against the bottom of the limit block (18), and the other end of the compression spring (27) abuts against the bottom of the mounting groove (26). A limit rod (28) is also fixedly installed at the bottom of the limit block (18) near the limit screw (31). The lower end of the limit rod (28) is inserted into a through hole at the bottom of the mounting groove (26).