A bleaching reactor for wood pulp production

Abstract

This utility model relates to the field of wood pulp bleaching, and more particularly to a bleaching reaction device in wood pulp production. The technical solution is as follows: A bleaching reaction device in wood pulp production includes a support base, an outer rotating frame, an inner rotating frame, a bleaching tank, a rotating shaft, a first stirring rod, and a second stirring rod. The upper end of the support base is fixedly connected to the inner rotating frame, which is symmetrically distributed on both sides. The outer rotating frame is fixedly connected to the left and right ends of the inner rotating frame. The bleaching tank is rotatably mounted between the inner rotating frames. This utility model, through the rotating shaft and bleaching tank driven by the first and second motors, can drive several sets of intersecting first and second stirring rods to comprehensively stir and mix the wood pulp and bleaching reagent in the bleaching tank, thereby improving the mixing effect and efficiency of the wood pulp and bleaching reagent. This solves the problem of poor mixing effect and numerous stirring dead zones in existing wood pulp bleaching reaction devices.

Description

Technical Field

[0001] This utility model belongs to the field of wood pulp bleaching, and specifically relates to a bleaching reaction device in wood pulp production. Background Technology

[0002] The bleaching reactor in wood pulp production is mainly used to remove natural impurities such as lignin from wood pulp, making the pulp whiter and thus achieving the goal of producing high-quality paper.

[0003] Most existing wood pulp bleaching equipment has a relatively traditional design for its mixing structure, and the movement of the mixing and stirring structure is simple. This results in a limited range of mixing of wood pulp by the stirring structure, and there are often many mixing dead zones. As a result, the dense wood pulp is prone to sedimentation, making it difficult for the wood pulp and bleaching agent to be mixed in an all-round and thorough manner, which seriously affects the uniformity and efficiency of the wood pulp bleaching effect.

[0004] Therefore, in view of the problems of poor mixing effect of wood pulp and bleaching agent and the existence of a large number of dead zones in the existing wood pulp bleaching reaction device, a bleaching reaction device for wood pulp production is developed. By adding a multi-directional stirring structure and a double-interlaced mixing structure to the wood pulp bleaching device, the mixing effect and efficiency of wood pulp and bleaching agent in the wood pulp bleaching reaction device can be effectively improved. Utility Model Content

[0005] To overcome the problems of poor mixing effect between wood pulp and bleaching agent and the existence of a large number of dead zones in the stirring when using existing wood pulp bleaching reaction equipment.

[0006] The technical solution of this utility model is as follows: a bleaching reaction device for wood pulp production, comprising a supporting base, an outer rotating frame and an inner rotating frame, and further comprising a bleaching tank, a rotating shaft, a first stirring rod and a second stirring rod. The upper end of the supporting base is fixedly connected to the inner rotating frame, which is symmetrically distributed on the left and right sides. The left and right ends of the inner rotating frame are fixedly connected to the outer rotating frame. The bleaching tank is rotatably installed between the inner rotating frames. The inner wall of the outer rotating frame is rotatably installed with the rotating shaft. Several sets of first stirring rods are equidistantly distributed around the outer wall of the rotating shaft and fixedly connected to the outer wall of the rotating shaft. The right end of the inner rotating frame is fixedly connected to the first motor, and the output end of the first motor is connected to the right end of the rotating shaft. Several sets of second stirring rods are equidistantly distributed around the inner wall of the bleaching tank and fixedly connected to the inner wall of the bleaching tank. The right end of the bleaching tank is fixedly connected to the second gear. The left side of the inner wall of the inner rotating frame is fixedly connected to the second motor. The output end of the second motor passes through the left end of the inner rotating frame and is fixedly connected to the first gear. The outer walls of the first gear and the second gear are fitted with belts.

[0007] Preferably, the bleaching tank and the second gear have through holes at both ends, the rotating shaft passes through the through holes, and the first stirring rod is located on the inner wall of the bleaching tank.

[0008] Preferably, the first stirring rod and the second stirring rod are staggered, and the inner wall of the belt meshes with the first gear and the second gear.

[0009] Preferably, the front end of the support base is provided with a storage slot, and a material receiving cabinet is provided in the storage slot. The protective shell is fitted onto the outer wall of the first gear, the second gear and the belt.

[0010] Preferably, the left and right ends of the storage slot are fixed with limit blocks, and the left and right ends of the receiving cabinet are provided with limit slots that are compatible with the limit blocks.

[0011] Preferably, the protective shell is installed on the right side of the inner rotating frame, and the right end of the protective shell is in contact with the inner wall of the right end of the outer rotating frame.

[0012] Preferably, the bleaching tank is equipped with a feed inlet at the top, and a feed cover is snapped onto the feed inlet.

[0013] The beneficial effects of this utility model are:

[0014] 1. The rotating shaft driven by the first motor can drive several sets of first stirring rods to perform preliminary stirring and mixing of wood pulp and bleaching reagent in the bleaching tank, thereby improving the effect and efficiency of mixing and bleaching wood pulp and bleaching reagent;

[0015] 2. The first gear, belt and second gear driven by the second motor can drive the second stirring rod in the bleaching tank to perform secondary stirring and mixing of wood pulp and bleaching reagent in the bleaching tank, so as to improve the effect and efficiency of mixing and bleaching wood pulp and bleaching reagent. Attached Figure Description

[0016] Figure 1 The diagram shown is a three-dimensional structural schematic of the bleaching reaction device in wood pulp production according to this utility model.

[0017] Figure 2 The diagram shown is a three-dimensional disassembled schematic diagram of the bleaching reaction device in wood pulp production according to this utility model.

[0018] Figure 3 The diagram shows a three-dimensional disassembled view of the supporting base, receiving cabinet, internal rotating frame, first motor, first gear, belt and protective shell of the bleaching reaction device in wood pulp production according to this utility model.

[0019] Figure 4 The diagram shows a three-dimensional view of the external rotating frame of the bleaching reaction device in wood pulp production according to this utility model.

[0020] Figure 5The diagram shown is a three-dimensional disassembled view of the bleaching tank, second gear, second motor, rotating shaft, first stirring rod, and feed cover of the bleaching reaction device in wood pulp production according to this utility model.

[0021] Figure 6 The diagram shown is a cross-sectional perspective view of the bleaching tank and the second stirring rod of the bleaching reaction device in wood pulp production according to this utility model.

[0022] Explanation of reference numerals in the attached drawings: 1-Bearing base, 2-External rotating frame, 3-Bleaching tank, 4-Receiving cabinet, 5-First motor, 6-Protective shell, 7-Internal rotating frame, 8-Receiving slot, 9-Belt, 10-First gear, 11-Second motor, 12-Limiting groove, 13-Limiting block, 14-Feed cover, 15-Feed inlet, 16-Second gear, 17-Rotating shaft, 18-First stirring rod, 19-Through hole, 20-Second stirring rod. Detailed Implementation

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] Please see Figures 1-6 This utility model provides an embodiment of a bleaching reaction device for wood pulp production, comprising a supporting base 1, an outer rotating frame 2, and an inner rotating frame 7, and further comprising a bleaching tank 3, a rotating shaft 17, a first stirring rod 18, and a second stirring rod 20. The upper end of the supporting base 1 is fixedly connected to the inner rotating frame 7, which is symmetrically distributed on both sides. The outer rotating frame 2 is fixedly connected to the left and right ends of the inner rotating frame 7. The bleaching tank 3 is rotatably mounted between the inner rotating frames 7. The rotating shaft 17 is rotatably mounted on the inner wall of the outer rotating frame 2, and a ring is fixedly connected to the outer wall of the rotating shaft 17. Several sets of first stirring rods 18 are evenly distributed around the wall. A first motor 5 is fixed to the right end of the internal rotating frame 7. The output end of the first motor 5 is connected to the right end of the rotating shaft 17. Several sets of second stirring rods 20 are evenly distributed around the inner wall of the bleaching tank 3. A second gear 16 is fixed to the right end of the bleaching tank 3. A second motor 11 is fixed to the left side of the inner wall of the internal rotating frame 7. The output end of the second motor 11 passes through the left end of the internal rotating frame 7 and is fixed to the first gear 10. A belt 9 is fitted on the outer wall of the first gear 10 and the second gear 16.

[0025] The rotating shaft 17 driven by the first motor 5 can drive several sets of first stirring rods 18 to initially stir and mix the wood pulp and bleaching agent in the bleaching tank 3. Then, in conjunction with the first gear 10, belt 9 and second gear 16 driven by the second motor 11, the second stirring rod 20 in the bleaching tank 3 can be driven to perform secondary stirring and mixing of the wood pulp and bleaching agent in the bleaching tank 3, so as to fully and comprehensively stir the wood pulp and bleaching agent in the bleaching tank 3 without dead angles, thereby improving the effect and efficiency of mixing and bleaching the wood pulp and bleaching agent.

[0026] Please see Figures 3-6 In this embodiment, through holes 19 are provided at both ends of the bleaching tank 3 and the second gear 16. The rotating shaft 17 passes through the through holes 19. The first stirring rod 18 is located on the inner wall of the bleaching tank 3. In use, the through holes 19 allow the first stirring rod 18 on the outer wall of the rotating shaft 17 to rotate and stir on the inner wall of the bleaching tank 3. The first stirring rod 18 and the second stirring rod 20 are interleaved. The inner wall of the belt 9 meshes with the first gear 10 and the second gear 16. In use, the interleaved first stirring rod 18 and the second stirring rod 20 can fully stir and mix the wood pulp in the bleaching tank 3 to reduce the dead zones of stirring.

[0027] Please see Figures 3-4 In this embodiment, a storage groove 8 is provided at the front end of the support base 1, and a receiving cabinet 4 is provided inside the storage groove 8. The protective shell 6 is fitted onto the outer wall of the first gear 10, the second gear 16, and the belt 9. During use, the receiving cabinet 4 can easily pour out the bleached wood pulp along the feed inlet 15. Limiting blocks 13 are fixed to the left and right ends of the storage groove 8, and limiting grooves 12 are provided at the left and right ends of the receiving cabinet 4. The limiting grooves 12 are adapted to the limiting blocks 13. During use, the adapted limiting blocks 13 and limiting grooves 12 can make the receiving cabinet 4 move back and forth stably along the inner wall of the storage groove 8, so as to improve the stability of the receiving cabinet 4 in the storage groove 8 and prevent it from shifting. The protective shell 6 is installed on the right side of the internal rotating frame 7, and the right end of the protective shell 6 is in contact with the inner wall of the right end of the external rotating frame 2. During use, the protective shell 6 can cover and protect the first gear 10, the second gear 16, and the belt 9 to improve their service life.

[0028] Please see Figure 5 In this embodiment, a feed inlet 15 is installed at the upper end of the bleaching tank 3, and a feed cover 14 is snap-on installed on the feed inlet 15. During use, the snap-on feed cover 14 can close the feed inlet 15 when the wood pulp is stirred and mixed in the bleaching tank 3 to prevent wood pulp from leaking out.

[0029] When using it, first, open the feed cover 14 and pour the wood pulp raw materials and bleaching reagent into the bleaching tank 3, and then install and reset the feed cover 14.

[0030] Next, the second motor 11 is started, which drives the first gear 10 to drive the belt 9 to rotate along the outer wall of the second gear 16, and drives the second gear 16 to rotate, so that the bleaching tank 3 and the second stirring rod 20 inside it are rotated with the internal rotating frame 7 as the fulcrum.

[0031] Then, the first motor 5 is started, and the first motor 5 drives the rotating shaft 17 to rotate, thereby driving several sets of first stirring rods 18 to rotate. The interlaced and rotating first stirring rods 18 and second stirring rods 20 can fully stir and mix the wood pulp and bleaching reagent in the bleaching tank 3, and reduce the four corners of the stirring and mixing.

[0032] After bleaching is completed, turn off the first motor 5 to stop the rotation of the rotating shaft 17 and the first stirring rod 18, and drive the feed port 15 on the bleaching tank 3 downward to align with the receiving cabinet 4 by the second motor 11. Then open the feed cover 14 to let the bleached wood pulp fall into the receiving cabinet 4. Then the worker pulls the handle on the receiving cabinet 4 to remove it from the storage tank 8.

[0033] Through the above steps, the rotating shaft 17 driven by the first motor 5 can drive several sets of first stirring rods 18 to initially stir and mix the wood pulp and bleaching reagent in the bleaching tank 3. Then, in conjunction with the first gear 10, belt 9 and second gear 16 driven by the second motor 11, the second stirring rod 20 in the bleaching tank 3 can be driven to perform secondary stirring and mixing of the wood pulp and bleaching reagent in the bleaching tank 3. This ensures that the wood pulp and bleaching reagent in the bleaching tank 3 are thoroughly and comprehensively stirred without dead angles, thereby improving the effect and efficiency of mixing and bleaching the wood pulp and bleaching reagent. This solves the problem of poor mixing effect of wood pulp and bleaching reagent and the existence of a large number of dead angles in the existing wood pulp bleaching reaction device.

[0034] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A bleaching reaction device for wood pulp production, comprising a support base (1), an external rotating frame (2), and an internal rotating frame (7), characterized in that: It also includes a bleaching tank (3), a rotating shaft (17), a first stirring rod (18), and a second stirring rod (20). An internal rotating frame (7) symmetrically distributed on the left and right sides is fixed to the upper end of the supporting base (1). An external rotating frame (2) is fixed to both ends of the internal rotating frame (7). A bleaching tank (3) is rotatably mounted between the internal rotating frames (7). A rotating shaft (17) is rotatably mounted on the inner wall of the external rotating frame (2). Several sets of first stirring rods (18) equidistantly distributed around the outer wall of the rotating shaft (17) are fixed to the outer wall of the rotating shaft (17). The internal rotating frame (7)... A first motor (5) is fixed to the right end. The output end of the first motor (5) is connected to the right end of the rotating shaft (17). Several sets of second stirring rods (20) are fixed to the inner wall of the bleaching tank (3) and are distributed at equal intervals around the inner wall of the bleaching tank (3). A second gear (16) is fixed to the right end of the bleaching tank (3). A second motor (11) is fixed to the left side of the inner wall of the internal rotating frame (7). The output end of the second motor (11) passes through the left end of the internal rotating frame (7) and is fixed to the first gear (10). A belt (9) is fitted on the outer wall of the first gear (10) and the second gear (16).

2. The bleaching reaction apparatus for wood pulp production according to claim 1, characterized in that: The bleaching tank (3) and the second gear (16) have through holes (19) at their left and right ends, the rotating shaft (17) passes through the through holes (19), and the first stirring rod (18) is located on the inner wall of the bleaching tank (3).

3. The bleaching reaction apparatus for wood pulp production according to claim 1, characterized in that: The first stirring rod (18) and the second stirring rod (20) are interlocked, and the inner wall of the belt (9) meshes with the first gear (10) and the second gear (16).

4. The bleaching reaction apparatus for wood pulp production according to claim 1, characterized in that: The front end of the support base (1) is provided with a storage slot (8), and a receiving cabinet (4) is provided in the storage slot (8). The protective shell (6) is fitted onto the outer wall of the first gear (10), the second gear (16) and the belt (9).

5. The bleaching reaction apparatus for wood pulp production according to claim 4, characterized in that: Limiting blocks (13) are fixed to the left and right ends of the storage slot (8), and limiting slots (12) are opened at the left and right ends of the receiving cabinet (4). The limiting slots (12) are compatible with the limiting blocks (13).

6. The bleaching reaction apparatus for wood pulp production according to claim 4, characterized in that: The protective shell (6) is installed on the right side of the inner rotating frame (7), and the right end of the protective shell (6) is in contact with the inner wall of the right end of the outer rotating frame (2).

7. The bleaching reaction apparatus for wood pulp production according to claim 1, characterized in that: The upper end of the bleaching tank (3) is equipped with a feed inlet (15), and a feed cover (14) is snapped onto the feed inlet (15).

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