A chemical mechanical pulp white mud recovery device

Abstract

The present invention discloses a chemical mechanical pulping white mud recovery device, which relates to the field of papermaking recycling technology. The device comprises a flocculation tank for recovering green liquor, a variable flocculation and stirring mechanism for improving the flocculation effect of the flocculation tank and squeezing the precipitated white mud, a control mechanism for controlling the variable flocculation and stirring mechanism to variably spray flocculation reagents, and a control cabinet for controlling the discharge of the variable flocculation and stirring mechanism to change the state of the variable flocculation and stirring mechanism. A recovery tank is provided adjacent to the flocculation tank. When flocculating green liquor for recovery, the device utilizes the coordinated action of the variable flocculation and stirring mechanism and the control mechanism to increase the flocculation and sedimentation rate of the white mud in the green liquor. Furthermore, after the flocculation and sedimentation are completed, the device automatically squeezes the white mud to discharge the reusable liquid contained in the white mud, thereby improving the recovery effect.

Description

Technical Field

[0001] The present invention relates to the technical field of papermaking recycling, in particular to a chemical mechanical pulp white mud recovery device. Background Art

[0002] In papermaking, black liquor is extracted, evaporated, and concentrated, then burned in an alkali recovery furnace to produce a melt. This melt, dissolved in water, is called green liquor, whose primary component is sodium carbonate. These substances are crucial to the papermaking process. The sodium carbonate and sodium bicarbonate in green liquor are important chemicals in the papermaking process and can be recycled back into the pulping process, reducing the consumption of fresh chemicals. Then, a sodium carbonate solution and lime are used as raw materials for a causticization reaction, producing a sodium hydroxide solution and a calcium carbonate precipitate. The calcium carbonate in the solution forms a precipitate called white mud through chemical and physical mechanical reactions. White mud is a significant byproduct in the papermaking industry. In the alkaline papermaking process, the raw material is cooked with sodium hydroxide to produce dark brown straw pulp. Washing the straw pulp with water during this process produces black liquor containing sodium hydroxide. To recover the sodium hydroxide, the black liquor is evaporated, concentrated, and burned, producing ash containing sodium sulfate and sodium hydroxide. This ash is absorbed by water to form green liquor, which is then precipitated with quicklime to form calcium salts. After vacuum filtration, white mud is formed, the primary components of which are calcium carbonate and calcium sulfate.

[0003] White mud contains a certain amount of water. Due to the low dryness of white mud, the residual alkali content in the water after filtration treatment is high, the loss of alkali is large, and the alkali recovery rate is reduced, which not only increases the production cost, but also increases the pollution load on the environment. On the other hand, since the sodium carbonate precipitate, namely green mud, contained in the green liquor is an interfering substance, it will have a great impact on the subsequent sedimentation of lime, so the green mud needs to be filtered first. However, the green mud in the pulp is difficult to flocculate and precipitate, and the green liquor purification effect is poor, which further causes the subsequent alkali recovery rate to be low. At this time, in order to improve the recovery rate of white mud, it is necessary to enhance the precipitation effect at the same time, and separate the green liquor and white mud as much as possible to facilitate subsequent separate recovery. However, the existing device often puts in the flocculant in a concentrated manner after adding it, resulting in a poor flocculation effect of the green liquor, resulting in a low recovery rate when recovering the green liquor. Summary of the Invention

[0004] The technical solution of the present invention addresses the technical problem that the existing technical solutions are too single, and provides a solution that is significantly different from the existing technologies. An embodiment of the present invention provides a chemical mechanical pulp white mud recovery device to solve the existing technical problems of low recovery rate due to poor flocculation effect and low recovery efficiency due to poor flocculant mixing effect when recovering white mud.

[0005] The embodiment of the present invention adopts the following technical solution: a chemical mechanical pulp white mud recovery device, including a flocculation tank for recovering and treating green liquor, and also including a variable flocculation and stirring mechanism for improving the flocculation effect of the flocculation tank and squeezing the precipitated white mud, a control mechanism for controlling the variable flocculation and stirring mechanism to perform variable spraying of flocculation agents, and a control cabinet for controlling the discharge to change the state of the variable flocculation and stirring mechanism. A recovery tank is provided next to the flocculation tank.

[0006] Furthermore, a spiral guide groove is provided in the flocculation tank, a recovery groove is provided at the bottom of the flocculation tank, a diaphragm for liquid to pass through is provided in the recovery groove, a control electric telescopic rod is provided at the end of the spiral guide groove, a bottom plate is provided at the bottom of the flocculation tank, and a selectively openable discharge port is provided on the bottom plate.

[0007] Furthermore, the end of the spiral guide groove is a vertical groove, and there is a gap between the spiral guide groove and the top of the flocculation tank.

[0008] Furthermore, the variable flocculation and stirring mechanism includes a screw, which is arranged in the flocculation tank, and a driving motor is provided at the top of the screw, a threaded sleeve is provided on the screw for use therewith, the threaded sleeve is a hollow structure, and a rotating plate is provided on the threaded sleeve, the rotating plate is connected to the liquid inlet pipe, a spiral stirring tube is provided outside the threaded sleeve, a plurality of liquid outlet holes are provided on the spiral stirring tube, a guide sleeve is provided at the end of the spiral stirring tube, a guide ball is provided on the side wall of the guide sleeve, the guide ball is used in conjunction with the spiral guide groove, a matching block is provided on the guide sleeve, an electric card and block are provided on the threaded sleeve, the position of the electric card and block corresponds to the position of the matching block, a limiting electric telescopic rod is provided on the side of the bottom of the screw, and a matching sensor is provided at the output end of the limiting electric telescopic rod, a hydraulic bag is provided between the matching sensor and the threaded sleeve, a contactor for use with the matching sensor is provided at the bottom of the threaded sleeve, and an extrusion scraper is provided at the bottom of the guide sleeve.

[0009] Furthermore, the spiral stirring tube is made of a plastic deformable material with recovery ability.

[0010] Furthermore, the spiral stirring tube is provided with a plurality of limiting blocks for dividing the interior of the spiral stirring tube into a plurality of spaces.

[0011] Furthermore, the control mechanism includes a connecting pipe, which is arranged beside the spiral stirring pipe, and the connecting pipe and the spiral stirring pipe are connected by a plurality of conveying pipes, the connecting pipe is connected with the threaded sleeve, a guide rod is provided in the connecting pipe, a liquid discharge control block is slidably connected to the guide rod, a liquid discharge groove is provided in the liquid discharge control block, and a magnetic block is provided in the liquid discharge control block, the liquid discharge control block and the connecting pipe are connected by a spring column, the hydraulic bag and the connecting pipe are connected by a conveying pipe, a connecting block is provided in each of the conveying pipes, a magnetic block with a through hole is provided below the connecting block, and the connecting block and the magnetic block are connected by a connecting spring rod, and the magnetic block and the magnetic block are used in conjunction with each other.

[0012] Furthermore, the bottom of the connecting pipe is planar, the liquid outlet control block divides the internal space of the connecting pipe into two parts, and the end of the connecting pipe is made of a plastic deformable material.

[0013] Compared with the prior art, the present invention has the following beneficial effects:

[0014] First, by providing a variable flocculation and stirring mechanism, the flocculation treatment using this mechanism is compared to conventional flocculation treatment (it should be noted that the main purpose of flocculation treatment of green liquor is to remove white mud from the green liquor so that the sodium sulfate and sodium sulfide in the green liquor can continue to be used in the papermaking process). Conventional flocculation directly puts the flocculating agent into the flocculation tank and then stirs it. Although a stirring mechanism is provided, the green liquor itself is viscous, and the flocculation products formed after the initial flocculation are also in the liquid. As a result, in the later flocculation process, the contact between the flocculating agent and the liquid is relatively poor, and this becomes more so towards the bottom. The presence of the products will appropriately affect the reaction efficiency, resulting in relatively poor flocculation efficiency. However, during the flocculation process, the variable flocculation and stirring mechanism allows the spiral stirring tube used for stirring and spraying to move up and down and rotate relatively slowly. The slower rotation facilitates flocculation, and the up and down movement changes the position of the flocculating liquid, thereby facilitating contact with the green liquor.

[0015] Furthermore, by utilizing the control mechanism, when the spiral stirring tube moves up and down, the spiral stirring tube is rolled into a disc shape with a small top and a large bottom. As a result, when the liquid is sprayed, the lateral range of the spray will also change, so that the spray position of the flocculating liquid will change in both the lateral and longitudinal directions, thereby facilitating better contact with the green liquor.

[0016] At the same time, since the spiral stirring tube can be rolled into a disc shape, during the flocculation process, the spiral stirring tube moves up and down normally. When the flocculation is completed, the white mud has settled. However, due to the characteristics of the white mud, there will still be some liquid in the white mud. At this time, in order to improve the recovery rate, the spiral stirring tube can be transformed into a disc shape to squeeze the white mud that has been discharged from the green liquor and settled at the bottom, thereby squeezing out the water contained in the white mud, improving the recovery efficiency and reducing the subsequent processing steps of the white mud;

[0017] In summary, when the device flocculates the green liquor for recovery, the coordinated action of the variable flocculation stirring mechanism and the control mechanism can increase the flocculation and sedimentation rate of the white mud in the green liquor. At the same time, when the flocculation and sedimentation are completed, the white mud can be automatically squeezed to discharge the reusable liquid contained in the white mud, thereby improving the recovery effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 It is a schematic diagram of the main structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the internal structure of the flocculation tank of the present invention;

[0021] Figure 3 This is a schematic structural diagram of the spiral guide groove of the present invention from a first perspective;

[0022] Figure 4 This is a schematic structural diagram of the spiral guide groove of the present invention from a second viewing angle;

[0023] Figure 5 This is a schematic structural diagram of the variable flocculation and stirring mechanism of the present invention from a first perspective;

[0024] Figure 6 This is a schematic structural diagram of the variable flocculation and stirring mechanism of the present invention from a second viewing angle;

[0025] Figure 7 This is a schematic diagram of the cross-sectional structure of the spiral stirring tube of the present invention;

[0026] Figure 8 Schematic diagram of the control mechanism structure of the present invention;

[0027] Figure 9 For the present invention Figure 5A in the middle is an enlarged structural diagram;

[0028] Figure 10 For the present invention Figure 8 Enlarged structural diagram at point B in the middle.

[0029] Reference numerals:

[0030] 1. Flocculation tank; 12. Spiral guide groove; 13. Control electric telescopic rod; 14. Bottom plate; 15. Discharge port; 2. Variable flocculation stirring mechanism; 21. Screw; 22. Hydraulic bag; 23. Electric card and block; 24. Spiral stirring tube; 25. Matching block; 26. Guide sleeve; 27. Limit electric telescopic rod; 28. Rotating plate; 29. Limiting block; 210. Threaded sleeve; 211. Matching sensor; 312. Extrusion scraper; 3. Control mechanism; 31. Connecting pipe; 32. Magnetic block; 33. Connecting spring rod; 34. Delivery pipe; 35. Connecting block; 36. Spring column; 37. Liquid discharge control block; 38. Magnetic block; 39. Guide rod; 310. Connecting pipe; 4. Liquid inlet pipe; 5. Recovery tank. DETAILED DESCRIPTION

[0031] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0032] The components of the embodiments of the present invention generally described and shown in the drawings herein may be arranged and designed in a variety of different configurations. Therefore, the following detailed description of the embodiments of the invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention.

[0033] Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative work shall fall within the scope of protection of the present invention.

[0034] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0036] The following combination Figures 1 to 10 As shown, an embodiment of the present invention provides a chemical mechanical pulp white mud recovery device, including a flocculation tank 1 for recovering and treating green liquor, and also includes a variable flocculation and stirring mechanism 2 for improving the flocculation effect of the flocculation tank 1 and squeezing the precipitated white mud, a control mechanism 3 for controlling the variable flocculation and stirring mechanism 2 to perform variable spraying of flocculation agents, and a control cabinet for controlling the discharge to change the state of the variable flocculation and stirring mechanism 2. A recovery tank 5 is provided next to the flocculation tank 1.

[0037] During operation, when the device flocculates the green liquor for recovery, the flocculation and sedimentation rate of the white mud in the green liquor can be increased by utilizing the coordinated action of the variable flocculation and stirring mechanism 2 and the regulating mechanism 3. At the same time, when the flocculation and sedimentation are completed, the white mud can be automatically squeezed to discharge the reusable liquid contained in the white mud, thereby improving the recovery effect.

[0038] Specifically, a spiral guide groove 12 is provided in the flocculation tank 1, a recovery groove is provided at the bottom of the flocculation tank 1, a diaphragm for liquid to pass through is provided in the recovery groove, a control electric telescopic rod 13 is provided at the end of the spiral guide groove 12, a bottom plate 14 is provided at the bottom of the flocculation tank 1, and a selectively openable discharge port 15 is provided on the bottom plate 14.

[0039] Specifically, the end of the spiral guide groove 12 is a vertical groove, and there is a gap between the spiral guide groove 12 and the top of the flocculation tank 1 .

[0040] During operation, the spiral stirring tube 24 is affected by the spiral guide groove 12 in the initial stage and rotates at this time. However, after moving to the end, the spiral stirring tube 24 can only move up and down and cannot rotate, thereby pressing the white mud settled at the bottom, thereby achieving the effect of removing the recyclable liquid contained in the white mud. The threaded stirring tube 24 is conical, with a small top and a large bottom. At the same time, the staggered arrangement between the threaded stirring tubes 24 can be stacked into a disc without gaps.

[0041] Specifically, the variable flocculation stirring mechanism 2 includes a screw 21, which is arranged in the flocculation tank 1, and a driving motor is provided on the top of the screw 21, and a threaded sleeve 210 used in conjunction with it is provided on the screw 21, and the threaded sleeve 210 is a hollow structure, and a rotating plate 28 is provided on the threaded sleeve 210, and the rotating plate 28 is connected to the liquid inlet pipe 4, and a spiral stirring tube 24 is provided outside the threaded sleeve 210, and a plurality of liquid outlet holes are provided on the spiral stirring tube 24, and a guide sleeve 26 is provided at the end of the spiral stirring tube 24, and a guide ball is provided on the side wall of the guide sleeve 26. The ball is used in conjunction with the spiral guide groove 12. A matching block 25 is provided on the guide sleeve 26. An electric card and block 23 is provided on the threaded sleeve 210. The position of the electric card and block 23 corresponds to the position of the matching block 25. A limiting electric telescopic rod 27 is provided on the side of the bottom of the screw 21, and a matching sensor 211 is provided at the output end of the limiting electric telescopic rod 27. A hydraulic bag 22 is provided between the matching sensor 211 and the threaded sleeve 210. A contactor used in conjunction with the matching sensor 211 is provided at the bottom of the threaded sleeve 210. An extrusion scraper 312 is provided at the bottom of the guide sleeve 26.

[0042] Specifically, the spiral stirring tube 24 is made of a plastic deformable material with recovery ability, such as thermoplastic elastomer and thermoplastic polyurethane.

[0043] During operation, the spiral stirring tube 24 can undergo a shape change, thereby changing from a threaded tube to a disc shape, and can achieve both stirring and extrusion effects without adding any additional structure.

[0044] Specifically, the spiral stirring tube 24 is provided with a plurality of limiting blocks 29 for dividing the interior thereof into a plurality of spaces.

[0045] During operation, the spiral stirring tube 24 is disconnected, so that the flocculated liquid can only be sprayed at a specific layer, thereby achieving the effect that the spraying height and spraying distance are constantly changing.

[0046] Specifically, the regulating mechanism 3 includes a connecting pipe 31, which is arranged beside the spiral stirring tube 24, and the connecting pipe 31 and the spiral stirring tube 24 are connected by a plurality of conveying pipes 34. The connecting pipe 31 is connected to the threaded sleeve 210 through a guide rod 39 provided in the connecting pipe 31, and a liquid discharge control block 37 is slidably connected to the guide rod 39. A liquid discharge groove is provided in the liquid discharge control block 37, and a magnetic block 38 is provided in the liquid discharge control block 37. The liquid discharge control block 37 is connected to the connecting pipe 31 by a spring column 36, and the hydraulic bag 22 is connected to the connecting pipe 31 by a connecting pipe 310. A connecting block 35 is provided in each of the conveying pipes 34, and a magnetic block 32 with a through hole is provided below the connecting block 35. The connecting block 35 and the magnetic block 32 are connected by a connecting spring rod 33, and the magnetic block 32 and the magnetic block 38 are used in conjunction with each other. It should be noted that the magnetic block 32 and the magnetic block 38 are of the same polarity, so when they are close to each other, the magnetic block 32 will be displaced, and the through hole blocked by the connecting block 35 will be exposed, and liquid will enter at this time.

[0047] Specifically, the bottom of the connecting tube 31 is flat, the liquid outlet control block 37 divides the internal space of the connecting tube 31 into two parts, and the end of the connecting tube 31 is made of a plastic deformable material.

[0048] During operation, when the spiral stirring tube 24 changes, the connecting tube 31 will also change, so that the existence of the connecting tube 31 will not affect the use of the spiral stirring tube 24.

[0049] Working principle: The green liquor to be flocculated is transported to the flocculation tank 1, and then the control cabinet is started, the driving motor rotates to drive the screw 21 to rotate, and the screw 21 rotates. The threaded sleeve 210 connected to the screw 21 rotates. When the screw sleeve 26 is fully guided, it is affected by the guide ball and moves along the threaded guide groove. Due to the increased inclination angle of the threaded guide groove, the movement trajectory of the threaded sleeve 210 is downward while rotating at a slower speed.

[0050] At this time, the flocculating liquid enters the threaded sleeve 210 through the liquid inlet pipe 4. During the rotation of the threaded sleeve 210, since the threaded sleeve 210 is rotatably connected to the rotating plate 28, and the liquid inlet pipe 4 is connected to the rotating plate 28, the liquid inlet pipe 4 will not rotate. When supplying the flocculating liquid, it will pause at intervals to give time for reaction and discharge. The liquid entering the threaded sleeve 210 enters the connecting pipe 31. At this time, the liquid outlet control block 37 is at the very end of the connecting pipe 31, and the liquid outlet control block 37 corresponds to the position of the corresponding delivery pipe 34 at the very end. The magnetic block 38 in the liquid outlet control block 37 is opposite to the magnetic force of the magnetic block 32. At this time, the magnetic block 32 is displaced by the repulsive force, so that the magnetic block 32 is no longer in contact with the connecting block 35, and the through hole on the magnetic block 32 is exposed. The flocculating liquid enters through the through hole. In the spiral stirring tube 24 of the corresponding layer, since a plurality of limiting blocks 29 are provided in the spiral stirring tube 24, the spiral stirring tube 24 is divided into multiple layers, so that the spiral stirring tube 24 is not connected, and the magnetic block 32 and the connecting block 35 in the spiral stirring tube 24 of the remaining layers are affected by the spring column 36 and fit together, so that the liquid cannot circulate, resulting in the liquid only flowing out through a specific position. In the process of the movement of the threaded sleeve 210, the hydraulic bag 22 is squeezed, so that the liquid in the hydraulic bag 22 enters the other side of the liquid outlet control block 37 through the connecting pipe 310, pushing the liquid outlet control block 37 to move, thereby achieving a switching effect, and cooperating with the delivery pipes 34 at different positions in turn, so that the position of the spiral stirring tube 24 for each outflow of the flocculant is different, so that the flocculant can be discharged in a targeted manner, and the reaction is better.

[0051] When it moves to the end, the contactor at the bottom of the threaded sleeve 210 and the matching sensor 211 set at the output end of the limiting electric telescopic rod 27 reach a certain position. At this time, the driving motor is reversed, so that it is continuously stirred and the flocculation agent is removed, thereby improving the recovery efficiency. After the reaction has lasted for a certain period of time, the liquid that can be used for papermaking is discharged, thereby reducing costs. The white mud at the bottom contains a certain amount of liquid due to its characteristics. In order to improve the recovery rate of the liquid, the white mud needs to be squeezed to discharge the liquid contained in it. At the same time, after the liquid is discharged, the processing steps can be simplified in the later process of recycling the white mud. At this time, the limiting electric telescopic rod 27 is lowered once to change the moving height of the threaded sleeve 210. At this time, when it moves to the bottom, the threaded sleeve 210 has not moved to the bottom position. However, at this time, the guide sleeve 26 is restricted from moving under the action of the electric telescopic rod 13, resulting in the threaded sleeve 210 moving downward, while the guide sleeve 26 does not move. At this time, the state of the spiral stirring tube 24 gradually changes from a threaded shape to a flat disc shape. When the spiral stirring tube 24 overlaps, the electric card and block 23 are inserted into the matching block 25 to restrict the disc shape formed. Then, the electric telescopic rod is controlled to descend, exposing the linear groove below. At this time, the threaded sleeve 210 moves longitudinally under the action of the linear groove, thereby squeezing the white mud at the bottom. The squeezed liquid is discharged through the recovery tank (in the previous flocculation stage, the recovery tank is closed). After squeezing to a certain extent, the white mud at the bottom is recovered through the discharge port 15, thereby improving the liquid recovery rate and recovery speed, and reducing the subsequent white mud processing steps.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A chemical mechanical pulp white mud recovery device, comprising a flocculation tank (1) for recovering green liquor, characterized in that; It also includes a variable flocculation stirring mechanism (2) for improving the flocculation effect of the flocculation tank (1) and squeezing the precipitated white mud, a control mechanism (3) for controlling the variable flocculation stirring mechanism (2) to variably spray the flocculation agent, and a control cabinet for controlling the discharge so that the variable flocculation stirring mechanism (2) can change its state. A recovery tank (5) is provided next to the flocculation tank (1); A spiral guide groove (12) is provided in the flocculation tank (1), and a control electric telescopic rod (13) is provided at the end of the spiral guide groove (12); The end of the spiral guide groove (12) is a vertical groove, and there is a gap between the spiral guide groove (12) and the top of the flocculation tank (1); The variable flocculation stirring mechanism (2) includes a screw (21), the screw (21) is arranged in the flocculation tank (1), and a driving motor is arranged on the top of the screw (21), and a threaded sleeve (210) used in conjunction with the screw (21) is arranged on the screw (21), the threaded sleeve (210) is a hollow structure, and a rotating plate (28) is arranged on the threaded sleeve (210), and the rotating plate (28) is connected to the liquid inlet pipe (4), and a spiral stirring tube (24) is arranged outside the threaded sleeve (210), and a plurality of liquid outlet holes are arranged on the spiral stirring tube (24), and a guide sleeve (26) is arranged at the end of the spiral stirring tube (24), and a guide ball is arranged on the side wall of the guide sleeve (26), and the guide ball is connected to the spiral stirring tube (24). The guide groove (12) is used in conjunction with the guide sleeve (26), a matching block (25) is provided on the guide sleeve (26), an electric card and block (23) is provided on the threaded sleeve (210) through a connecting rod, the position of the electric card and block (23) corresponds to the position of the matching block (25), a limiting electric telescopic rod (27) is provided on the side of the bottom of the screw rod (21), and a matching sensor (211) is provided on the output end of the limiting electric telescopic rod (27), a hydraulic bag (22) is provided between the matching sensor (211) and the threaded sleeve (210), a contactor used in conjunction with the matching sensor (211) is provided at the bottom of the threaded sleeve (210), and an extrusion scraper (312) is provided at the bottom of the guide sleeve (26); The spiral stirring tube (24) is made of a plastic deformable material with recovery capability, and a plurality of limiting blocks (29) are provided in the spiral stirring tube (24) so as to divide the interior of the spiral stirring tube into a plurality of spaces; The regulating mechanism (3) includes a connecting pipe (31), the connecting pipe (31) is arranged beside the spiral stirring pipe (24), and the connecting pipe (31) and the spiral stirring pipe (24) are connected through a plurality of conveying pipes (34), the connecting pipe (31) is connected to the threaded sleeve (210), a guide rod (39) is provided in the connecting pipe (31), a liquid discharge control block (37) is slidably connected to the guide rod (39), a liquid discharge groove is provided in the liquid discharge control block (37), and a magnetic The hydraulic pressure bag (22) and the connecting pipe (31) are connected via a delivery pipe (34). A connecting block (35) is provided in each delivery pipe (34). A magnetic block (32) with a through hole is provided below the connecting block (35). The connecting block (35) and the magnetic block (32) are connected via a connecting spring rod (33). The magnetic block (32) and the magnetic block (38) are used in conjunction with each other.

2. The chemical mechanical pulp white mud recovery device according to claim 1, characterized in that: A recovery tank is provided at the bottom of the flocculation tank (1), a diaphragm for liquid to pass through is provided in the recovery tank, a bottom plate (14) is provided at the bottom of the flocculation tank (1), and a selectively openable discharge port (15) is provided on the bottom plate (14).

3. The chemical mechanical pulp white mud recovery device according to claim 1, characterized in that: The bottom of the connecting pipe (31) is planar, the liquid outlet control block (37) divides the internal space of the connecting pipe (31) into two parts, and the end of the connecting pipe (31) is made of a plastic deformable material.

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