Paper pulp bleaching device

Abstract

The utility model discloses a paper pulp bleaching device which comprises a bleaching tank, a top cover is detachably mounted at the top of the bleaching tank, a transmission shaft is rotatably mounted at the center of the top cover, a first bevel gear is sleeved outside the transmission shaft, a speed reducing motor is mounted on the top cover through a support, and the output end of the speed reducing motor is in transmission connection with the transmission shaft. The bleaching agent is uniformly fed into the bleaching tank through the dosing mechanism, the mixing of paper pulp and the bleaching agent is accelerated by matching with the stirring of the stirrer, and the position of the semicircular cavity can be adjusted up and down under the matching of the connecting piece, so that the free switching of the conveying height of the bleaching agent is completed, and the problem that the conveying height of the bleaching agent cannot be changed in the transmission dosing process is avoided. The problem that the bleaching agent cannot be in full contact with paper pulp is solved, the two dosing mechanisms can be adjusted to be arranged at the same height or different heights according to needs, the bleaching agent can be smoothly put into the bleaching tank at different liquid levels, the bleaching precision is improved, and operation of technicians is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of pulp processing, in particular to a pulp bleaching device. Background Technique

[0002] Pulp is a fibrous substance made from plant fibers by different processing methods. It can be divided into mechanical pulp, chemical pulp and chemi-mechanical pulp according to the processing method. It is generally used for manufacturing paper and cardboard. In addition to being used for manufacturing special paper, refined pulp is also often used as a raw material for manufacturing cellulose derivatives such as cellulose esters and cellulose ethers;

[0003] During the production of pulp, it is necessary to bleach it. Therefore, it is necessary to use a bleaching device to complete the bleaching process of the pulp, which is beneficial to the subsequent production and processing of the pulp.

[0004] At present, most bleaching devices complete the drug addition work by means of top filling. Therefore, the bleaching agent cannot be quickly mixed with the pulp, resulting in uneven distribution of the bleaching agent, affecting the bleaching accuracy and efficiency of the pulp, increasing the bleaching cycle, and being unable to quickly and accurately send the bleaching agent to different liquid levels for quick contact mixing, which is not conducive to the smooth progress of the bleaching work. Content of the Utility Model

[0005] The purpose of the utility model is to provide a pulp bleaching device to solve the problems put forward in the above background technique.

[0006] To achieve the above purpose, the utility model provides the following technical solution: A pulp bleaching device, including a bleaching tank, a top cover is detachably installed on the top of the bleaching tank, a transmission shaft is rotatably installed at the center of the top cover, a first bevel gear is sleeved outside the transmission shaft, a reduction motor is installed on the top cover through a bracket, the output end of the reduction motor is in transmission connection with the transmission shaft, and a stirrer is detachably and fixedly installed at the bottom of the transmission shaft. Two medicine adding mechanisms are symmetrically installed on the upper surface of the top cover. Both medicine adding mechanisms are power-connected to the first bevel gear, and the two medicine adding mechanisms and the first bevel gear cooperate to complete the adjustment operation of the medicine adding position.

[0007] As a further preference of this technical solution, both medicine adding mechanisms include a concave seat installed on the top cover. A winding shaft is rotatably installed in the concave seat. Both ends of the winding shaft rotatably pass through the side wall of the concave seat. A first friction disk is detachably and fixedly installed on the winding shaft close to the transmission shaft. An adapter is installed on the top cover between the first friction disk and the transmission shaft to complete the power connection of the winding shaft through the adapter.

[0008] As a further preferred embodiment of the present technical solution, the connecting member includes a rotating shaft rotatably mounted on the top cover through a bracket, a No. 2 bevel gear is fixedly mounted on one end of the rotating shaft, the No. 2 bevel gear is meshingly and transmission-connected with the No. 1 bevel gear, a rectangular groove is opened at the other end of the rotating shaft, a rectangular member is slidably arranged in the rectangular groove, and a No. 2 friction disk is installed at the tail of the rectangular member.

[0009] As a further preferred embodiment of the present technical solution, a collar is provided on the outer rotating sleeve of the No. 2 friction disc, and a No. 1 electric push rod is installed on one side of the rotating shaft through a bracket, and the output end of the No. 1 electric push rod is transmission-connected to one side of the collar.

[0010] As a further preferred embodiment of the present technical solution, a winding rope is wound around the outside of the winding shaft, a semicircular cavity is slidably engaged with the inner wall of the bleaching tank, and a plurality of discharge pipes are connected and distributed on the lower surface of the semicircular cavity.

[0011] As a further optimization of the technical solution, a No. 1 tube is installed on one side of the top of the semicircular cavity, and a No. 2 tube is passed through one side of the top cover. The No. 1 tube and the No. 2 tube are connected by a spring tube, and the bottom of the winding rope is detachably fixed to the top of the semicircular cavity. At the same time, a through hole cooperating with the winding rope is opened through the top cover.

[0012] As a further preferred embodiment of the present technical solution, a gear ring is fixedly sleeved on one end of the winding shaft, an arc-shaped tooth plate is slidably installed on the side wall of the concave seat, and a No. 2 electric push rod is installed on one side of the concave seat through a bracket, and the output end of the No. 2 electric push rod is transmission-connected to the arc-shaped tooth plate.

[0013] The utility model provides a pulp bleaching device, which has the following beneficial effects:

[0014] (1) The utility model is provided with a connecting piece, and the friction contact between the No. 2 friction disc and the No. 1 friction disc is completed to achieve power connection. Under the action of friction, the No. 1 friction disc and the winding shaft are driven to rotate. The rotation of the winding shaft is then completed by controlling the forward and reverse rotation of the reduction motor. The liquid level height of the semicircular cavity can be switched and adjusted by the winding rope, and the free switching of the bleaching agent delivery height is completed, thereby avoiding the problem that the bleaching agent cannot fully contact with the pulp during transmission dosing.

[0015] (2) The utility model is provided with a dosing mechanism to connect the bleaching agent with the No. 2 pipe, and then delivers the bleaching agent into the semicircular cavity through the No. 1 pipe, and evenly delivers the bleaching agent to various positions in the bleaching tank through multiple discharge pipes, so that the bleaching agent can quickly contact the pulp, thereby improving the bleaching efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0017] Figure 2Schematic diagram of the internal structure of the bleaching tank of the present utility model;

[0018] Figure 3 Schematic diagram of the distribution of two chemical dosing mechanisms and a stirrer of the present utility model;

[0019] Figure 4 Schematic diagram of the distribution of two chemical dosing mechanisms of the present utility model;

[0020] Figure 5 Schematic diagram of the chemical dosing mechanism of the present utility model;

[0021] Figure 6 Schematic diagram of the engagement between the arc-shaped tooth plate and the gear ring of the present utility model.

[0022] In the figure: 1. Bleaching tank; 2. Top cover; 3. Discharge pipe; 4. Feed pipe; 5. Transmission shaft; 6. First bevel gear; 7. Reducing motor; 8. Stirrer; 9. Concave seat; 10. Take-up reel; 11. First friction disc; 12. Connector; 121. Rotating shaft; 122. Second bevel gear; 123. Rectangular groove; 124. Rectangular part; 125. Second friction disc; 13. Collar; 14. First electric push rod; 15. Take-up rope; 16. Semi-circular cavity; 17. Discharge pipe; 18. First pipe; 19. Second pipe; 20. Gear ring; 21. Arc-shaped tooth plate; 22. Second electric push rod. Specific implementation manner

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model.

[0024] The present utility model provides a technical solution: As Figures 1 to 6 shown, in this embodiment, a pulp bleaching device includes a bleaching tank 1, a top cover 2 is detachably installed on the top of the bleaching tank 1, a discharge pipe 3 is connected and installed on one side of the bottom of the bleaching tank 1, a manual valve for controlling its on-off is installed at the end of the discharge pipe 3, a feed pipe 4 is connected and installed on the top cover 2, a manual valve for controlling its on-off is installed at the end of the feed pipe 4, a transmission shaft 5 is rotatably installed at the center of the top cover 2, a first bevel gear 6 is sleeved outside the transmission shaft 5, a reducing motor 7 is installed on the top cover 2 through a bracket, the output end of the reducing motor 7 is in transmission connection with the transmission shaft 5, and a stirrer 8 is detachably and fixedly installed at the bottom of the transmission shaft 5. Two chemical dosing mechanisms are symmetrically installed on the upper surface of the top cover 2. Both chemical dosing mechanisms are power-connected to the first bevel gear 6, and the cooperation between the two chemical dosing mechanisms and the first bevel gear 6 can complete the adjustment operation of the chemical dosing position.

[0025] As Figures 3 to 6As shown, the two dosing mechanisms both include a concave seat 9 mounted on the top cover 2, a reel 10 is rotatably mounted in the concave seat 9, both ends of the reel 10 are rotatably arranged through the side wall of the concave seat 9, a No. 1 friction disc 11 is detachably fixedly mounted on the reel 10 near the side of the transmission shaft 5, a connector 12 is mounted on the top cover 2 between the No. 1 friction disc 11 and the transmission shaft 5, and the power connection of the reel 10 is completed through the connector 12;

[0026] It is worth noting that: when adding the bleach: the bleach is connected to the second pipe 19 by providing a dosing mechanism, and then the bleach is sent into the semicircular cavity 16 through the first pipe 18, and the bleach is evenly delivered to various positions in the bleaching tank 1 through multiple discharge pipes 17;

[0027] The connecting member 12 includes a rotating shaft 121 rotatably mounted on the top cover 2 through a bracket, a second bevel gear 122 is fixedly mounted on one end of the rotating shaft 121, and the second bevel gear 122 is meshed and transmission-connected with the first bevel gear 6, a rectangular groove 123 is provided at the other end of the rotating shaft 121, a rectangular member 124 is slidably provided in the rectangular groove 123, a second friction disc 125 is installed at the tail of the rectangular member 124, a collar 13 is rotatably sleeved on the outside of the second friction disc 125, and a first electric push rod 14 is installed on one side of the rotating shaft 121 through a bracket, and the output end of the first electric push rod 14 is transmission-connected with one side of the collar 13;

[0028] It is worth noting that when the position of the semicircular cavity 16 is adjusted: by providing a connecting piece 12, the No. 1 electric push rod 14 is started to push the collar 13 and the No. 2 friction disc 125 forward, so that the No. 2 friction disc 125 and the No. 1 friction disc 11 are in friction contact to complete the power connection, and then the No. 1 bevel gear 6 on the transmission shaft 5 drives the No. 2 bevel gear 122 to rotate, so that the rotating shaft 121 and the No. 2 friction disc 125 follow the rotation, and under the action of friction, the No. 1 friction disc 11 and the winding shaft 10 are driven to rotate, and the rotation of the winding shaft 10 is completed by the control of the forward and reverse rotation of the reduction motor 7, and the semicircular cavity 1 can be adjusted by the winding rope 15. 6 is switched to adjust the liquid level height. After the adjustment is completed, the No. 1 electric push rod 14 is reset and the power is interrupted. At this time, the No. 2 electric push rod 22 is started to push the arc tooth plate 21 to engage with the gear ring 20 to lock the reel 10, so that the semicircular cavity 16 obtains a stable dosing effect. At the same time, when the No. 2 electric push rod 22 pulls the arc tooth plate 21 to separate from the gear ring 20, the semicircular cavity 16 and the counterweight block arranged therein act to enable the semicircular cavity 16 to move downward in the bleaching tank 1, eliminating the control of the reduction motor 7 and the connector 12 on the downward movement of the semicircular cavity 16. It is only necessary to control the rise of the semicircular cavity 16 through the reduction motor 7, thereby reducing the difficulty of operation;

[0029] The reel 10 is wound with a reel rope 15, and a semicircular cavity 16 is slidably engaged with the inner wall of the bleaching tank 1. A slideway matching the semicircular cavity 16 is provided on the inner wall of the bleaching tank 1. A counterweight is installed in the semicircular cavity 16, and a plurality of discharge pipes 17 are connected and distributed on the lower surface of the semicircular cavity 16. A No. 1 pipe 18 is connected and installed on one side of the top of the semicircular cavity 16, and a No. 2 pipe 19 is connected and penetrated on one side of the top cover 2. The No. 1 pipe 18 and the No. 2 pipe 19 are connected by a spring tube. The bottom of the winding rope 15 and the top of the semicircular cavity 16 are detachably fixed, and a through hole cooperating with the winding rope 15 is penetrated through the top cover 2, and a gear ring 20 is fixedly sleeved on one end of the winding shaft 10, and an arc-shaped tooth plate 21 is slidably installed on the side wall of the concave seat 9, and a No. 2 electric push rod 22 is installed on one side of the concave seat 9 through a bracket, and the output end of the No. 2 electric push rod 22 is transmission-connected to the arc-shaped tooth plate 21.

[0030] The utility model provides a pulp bleaching device, and the specific working principle is as follows: first, the pulp is fed into the bleaching tank 1 through the feed pipe 4, and then the reduction motor 7 is started, and the agitator 8 is driven to rotate through the transmission shaft 5, so as to complete the mixing and homogenization of the pulp, and at the same time, the bleaching agent is evenly added into the bleaching tank 1 through the dosing mechanism, so as to complete the bleaching work of the pulp, and the stirring of the agitator 8 is coordinated to accelerate the mixing of the pulp and the bleaching agent, and the bleaching efficiency is improved, and under the cooperation of the connecting piece 12, the power of the transmission shaft 5 can be transmitted to the winding shaft 10, and the position of the semicircular cavity 16 can be adjusted up and down, so as to complete the free switching of the bleaching agent conveying height, and avoid the problem that the bleaching agent cannot fully contact with the pulp during the transmission dosing, and the two dosing mechanisms can be adjusted to the same height or high and low difference settings according to the needs, so that the bleaching agent can be smoothly added to different liquid level heights in the bleaching tank 1, thereby improving the bleaching accuracy and facilitating the operation of the technicians.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pulp bleaching device, comprising a bleaching tank (1), wherein a top cover (2) is detachably mounted on the top of the bleaching tank (1), characterized in that: A transmission shaft (5) is rotatably mounted at the center of the top cover (2), a first bevel gear (6) is sleeved on the outside of the transmission shaft (5), a reduction motor (7) is mounted on the top cover (2) through a bracket, the output end of the reduction motor (7) is transmission-connected to the transmission shaft (5), and a stirrer (8) is detachably fixedly mounted on the bottom of the transmission shaft (5), two dosing mechanisms are symmetrically mounted on the upper surface of the top cover (2), the two dosing mechanisms are both power-connected with the first bevel gear (6), and the two dosing mechanisms cooperate with the first bevel gear (6) to complete the adjustment operation of the dosing position.

2. A pulp bleaching device according to claim 1, characterized in that: The two dosing mechanisms both comprise a concave seat (9) mounted on a top cover (2), a reel (10) being rotatably mounted in the concave seat (9), both ends of the reel (10) being rotatably arranged to pass through the side wall of the concave seat (9), a first friction disc (11) being detachably fixedly mounted on the reel (10) on the side close to the transmission shaft (5), a connecting piece (12) being mounted on the top cover (2) between the first friction disc (11) and the transmission shaft (5), and the power connection of the reel (10) being completed through the connecting piece (12).

3. A pulp bleaching device according to claim 2, characterized in that: The connecting member (12) comprises a rotating shaft (121) rotatably mounted on the top cover (2) via a bracket, a second bevel gear (122) being fixedly mounted on one end of the rotating shaft (121), the second bevel gear (122) being meshingly connected with the first bevel gear (6) for transmission, a rectangular groove (123) being provided at the other end of the rotating shaft (121), a rectangular member (124) being slidably drawn in the rectangular groove (123), and a second friction disc (125) being mounted at the rear of the rectangular member (124).

4. A pulp bleaching device according to claim 3, characterized in that: A sleeve (13) is rotatably sleeved outside the second friction disc (125), and a first electric push rod (14) is installed on one side of the rotating shaft (121) through a bracket, and the output end of the first electric push rod (14) is transmission-connected to one side of the sleeve (13).

5. A pulp bleaching device according to claim 4, characterized in that: A winding rope (15) is wound around the outside of the winding shaft (10), a semicircular cavity (16) is slidably engaged with the inner wall of the bleaching tank (1), and a plurality of discharge pipes (17) are connected and distributed on the lower surface of the semicircular cavity (16).

6. A pulp bleaching device according to claim 5, characterized in that: A first pipe (18) is connected and installed on one side of the top of the semicircular cavity (16), and a second pipe (19) is connected and penetrated on one side of the top cover (2). The first pipe (18) and the second pipe (19) are connected by a spring tube, and the bottom of the winding rope (15) is detachably fixed to the top of the semicircular cavity (16). At the same time, a through hole is penetrated on the top cover (2) to cooperate with the winding rope (15).

7. A pulp bleaching device according to claim 6, characterized in that: A gear ring (20) is fixedly sleeved on one end of the reeling shaft (10), an arc-shaped toothed plate (21) is slidably mounted on the side wall of the concave seat (9), and a second electric push rod (22) is mounted on one side of the concave seat (9) through a bracket, and the output end of the second electric push rod (22) is drivingly connected to the arc-shaped toothed plate (21).

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