Chemico-mechanical pulp white mud recovery device

Abstract

The present invention discloses a chemimechanical pulp white mud recovery apparatus, and relates to the technical field of papermaking recovery, the chemimechanical pulp white mud recovery apparatus comprises a flocculation tank for recovering green liquor, and further comprises a variable flocculation stirring mechanism for improving the flocculation effect of the flocculation tank and extruding precipitated white mud, the regulation and control mechanism is used for controlling the variable flocculation stirring mechanism to spray out a flocculation agent in a variable mode, the control cabinet is used for controlling discharging to enable the variable flocculation stirring mechanism to change the state, and a recovery tank is arranged beside the flocculation tank. When the device is used for carrying out flocculation treatment on green liquor to recycle the green liquor, the flocculation precipitation rate of white mud in the green liquor can be increased by utilizing the matching effect of the variable flocculation stirring mechanism and the regulation and control mechanism, and meanwhile, the white mud can be automatically extruded after the flocculation precipitation is finished, so that the white mud can be recycled. And therefore, reusable liquid contained in the white mud is discharged, and the recovery effect is improved.

Description

Technical Field

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

[0002] In papermaking and pulping, the pulping black liquor is extracted, evaporated and concentrated, and burned in an alkali recovery furnace to obtain a molten product, which is dissolved in water or called green liquor. Its main component is sodium carbonate. These substances are very important for the papermaking process. Sodium carbonate and sodium bicarbonate in green liquor are important chemicals in the papermaking process. They can be recycled and used in the pulping process to reduce the consumption of fresh chemicals. Then, sodium carbonate solution and lime are used as raw materials to cause causticization reaction to generate sodium hydroxide solution and calcium carbonate precipitation. The calcium carbonate in it forms a precipitate through chemical and physical mechanical combination, and the precipitate is called white mud. In the papermaking industry, white mud is an important by-product. In the alkali papermaking process, dark brown grass pulp is produced by cooking raw materials with sodium hydroxide. In this process, washing grass pulp with water will produce black liquor containing sodium hydroxide. In order to recover sodium hydroxide, the black liquor will be evaporated, concentrated and burned, and the ash produced by the combustion contains sodium sulfate and sodium hydroxide. These ashes are absorbed by water to form green liquor, and then quicklime is added to form calcium salt precipitation. After vacuum filtration, white mud is formed, and its main components 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 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 of 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, but 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 it is necessary to separate the green liquor and white mud as much as possible, so as to facilitate the subsequent separate recovery. However, the existing device often concentrates the flocculant after the flocculant is added, resulting in poor flocculation effect of green liquor, resulting in a low recovery degree when the green liquor is recovered. Summary of the invention

[0004] The technical solution of the present invention aims at 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 scheme: a chemical mechanical pulp white mud recovery device, including a flocculation tank for recovering green liquor, and also including a variable flocculation stirring mechanism for improving the flocculation effect of the flocculation tank and squeezing the precipitated white mud, a regulating mechanism for controlling the variable flocculation stirring mechanism to perform variable spraying of flocculation agents, and a control cabinet for controlling the discharge so that the variable flocculation stirring mechanism can change its state, and a recovery tank is arranged 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] Further, the variable flocculation and stirring mechanism includes a screw, which is arranged in a flocculation tank, and a driving motor is arranged on the top of the screw, a threaded sleeve is arranged on the screw for use therewith, the threaded sleeve is a hollow structure, and a rotating plate is arranged on the threaded sleeve, the rotating plate is connected to the liquid inlet pipe, a spiral stirring tube is arranged outside the threaded sleeve, a plurality of liquid outlet holes are arranged on the spiral stirring tube, a guide sleeve is arranged at the end of the spiral stirring tube, a guide ball is arranged on the side wall of the guide sleeve, the guide ball is used in conjunction with the spiral guide groove, a matching block is arranged on the guide sleeve, an electric card and block are arranged on the threaded sleeve, and the position of the electric card and block corresponds to the position of the matching block, a limiting electric telescopic rod is arranged on the side of the bottom of the screw, and a matching sensor is arranged at the output end of the limiting electric telescopic rod, a hydraulic bag is arranged between the matching sensor and the threaded sleeve, a contactor used in conjunction with the matching sensor is arranged at the bottom of the threaded sleeve, and an extrusion scraper is arranged 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] Further, the regulating mechanism includes a connecting pipe, which is arranged on the side of the spiral stirring tube, and is connected to the spiral stirring tube by a plurality of conveying pipes, the connecting pipe is connected through the threaded sleeve, a guide rod is arranged in the connecting pipe, a liquid outlet control block is slidably connected to the guide rod, a liquid outlet through groove is provided in the liquid outlet control block, and a magnetic block is arranged in the liquid outlet control block, the liquid outlet control block is connected to the connecting pipe by a spring column, the hydraulic bag is connected to the connecting pipe by a conveying pipe, a magnetic block is arranged in each of the conveying pipes, a liquid outlet control block with a through hole is arranged below the connecting block, and the liquid outlet control block and the magnetic block are connected by a connecting spring rod, and the magnetic block and the magnetic block are used in combination.

[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 beneficial effects of the present invention are: First, by setting a variable flocculation stirring mechanism, when the flocculation treatment is performed by the mechanism, compared with the ordinary flocculation treatment (it should be explained at this time that when the green liquor is flocculated, the main purpose is to remove the white mud in the green liquor so that the sodium sulfate and sodium sulfide in the green liquor can continue to be used in the papermaking process), the existing ordinary flocculation directly puts the flocculation 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 will also be in the liquid, resulting in relatively poor contact between the flocculation agent and the liquid in the later flocculation process, and the more so towards the bottom, the presence of the product will appropriately affect the reaction efficiency, resulting in relatively poor flocculation efficiency. In the process of flocculation by the variable flocculation stirring mechanism, the spiral stirring tube used for stirring and spraying can move up and down and rotate relatively slowly, and the relatively slow rotation is convenient for flocculation, and the up and down movement makes the position of the flocculation liquid change, so as to facilitate contact with the green liquor; And by utilizing the control mechanism, when the spiral stirring tube moves up and down, the spiral stirring tube can be rolled into a disc shape with a small top and a large bottom, so that when the liquid is sprayed, the lateral range of the liquid spraying will also change, so that the spraying position of the flocculating liquid will change in the lateral and longitudinal directions, so as to facilitate better contact with the green liquid; At the same time, since the spiral stirring tube can be rolled into a disc, during the flocculation process, the spiral stirring tube moves up and down normally. When the flocculation is completed, the white mud has been precipitated, but 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 to squeeze the white mud that has been discharged from the green liquid and precipitated at the bottom, thereby squeezing out the water contained in the white mud, improving the recovery efficiency and reducing the subsequent treatment steps of the white mud; In summary, when the device flocculates the green liquor for recycling, the flocculation and sedimentation rate of the white mud in the green liquor can be increased by utilizing the coordinated effect of the variable flocculation and stirring mechanism and the regulating mechanism therein. 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 recycling effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 It is a schematic diagram of the main structure of the present invention; Figure 2 It is a schematic diagram of the internal structure of the flocculation tank of the present invention; Figure 3 It is a schematic structural diagram of the spiral guide groove of the present invention from a first viewing angle; Figure 4 It is a schematic structural diagram of the spiral guide groove of the present invention from a second viewing angle; Figure 5 It is a schematic structural diagram of the variable flocculation and stirring mechanism of the present invention from a first viewing angle; Figure 6 It is a schematic structural diagram of the variable flocculation and stirring mechanism of the present invention from a second viewing angle; Figure 7 It is a schematic diagram of the cross-sectional structure of the spiral stirring tube of the present invention; Figure 8 It is a schematic diagram of the control mechanism structure of the present invention; Fig. 9 For the present invention Figure 5 The enlarged structural diagram at A in the middle; Fig.10 For the present invention Figure 8 Enlarged structural diagram at B in the middle.

[0016] Reference numerals: 1. Flocculation tank; 11. Recovery tank; 12. Spiral guide tank; 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

[0017] The technical solution of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0018] The components of the embodiments of the present invention generally described and shown in the drawings herein may be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention.

[0019] 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.

[0020] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0021] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] Combine the following 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 green liquor, and 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 perform variable spraying of flocculation agents, and a control cabinet for controlling the discharge to change the state of the variable flocculation stirring mechanism 2. A recovery tank 5 is arranged next to the flocculation tank 1.

[0023] When the device is working, when flocculating the green liquor for recycling, the flocculation and sedimentation rate of the white mud in the green liquor can be increased by utilizing the coordinated effect of the variable flocculation and stirring mechanism 2 and the regulating mechanism 3 therein. 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 recycling effect.

[0024] Specifically, a spiral guide groove 12 is provided in the flocculation tank 1, a recovery groove 11 is provided at the bottom of the flocculation tank 1, a diaphragm for liquid to pass through is provided in the recovery groove 11, 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.

[0025] 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 .

[0026] During operation, the spiral stirring tube 24 will rotate under the influence of the spiral guide groove 12 in the initial stage, but after moving to the end, the spiral stirring tube 24 will 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.

[0027] Specifically, 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, 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, the rotating plate 28 is connected to the liquid inlet pipe 4, a spiral stirring tube 24 is arranged outside the threaded sleeve 210, a plurality of liquid outlet holes are arranged on the spiral stirring tube 24, 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. 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, and 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 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, and an extrusion scraper 312 is provided at the bottom of the guide sleeve 26.

[0028] Specifically, the spiral stirring tube 24 is made of a plastic deformable material with recovery ability, such as thermoplastic elastomer and thermoplastic polyurethane.

[0029] When working, the spiral stirring tube 24 can change its shape from a threaded tube to a disc shape, so that both stirring and extrusion effects can be achieved without adding any additional structure.

[0030] 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.

[0031] During operation, the spiral stirring tube 24 is disconnected, so that the flocculated liquid can only be sprayed out at a specific layer, thereby achieving the effect that the spraying height and the spraying distance are constantly changing.

[0032] 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 with the threaded sleeve 210 through, a guide rod 39 is arranged in the connecting pipe 31, a liquid discharge control block 37 is slidably connected to the guide rod 39, a liquid discharge through groove is provided in the liquid discharge control block 37, and a magnetic block 38 is arranged in the liquid discharge control block 37, the liquid discharge control block 37 and the connecting pipe 31 are connected by a spring column 36, the hydraulic bag 22 and the connecting pipe 31 are connected by a connecting pipe 310, a magnetic block 32 is arranged in each of the conveying pipes 34, a liquid discharge control block 37 with a through hole is arranged below the connecting block 35, and the liquid discharge control block 37 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 that 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 the liquid will enter at this time.

[0033] Specifically, the bottom of the connecting tube 31 is planar, 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.

[0034] 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 .

[0035] Working principle: The green liquid 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 with the screw 21 rotates. When the screw 21 is fully guided, the sleeve 26 is affected by the guide ball and moves along the threaded guide groove. Due to the threaded guide groove with an increased inclination angle, the movement trajectory of the threaded sleeve 210 is to move downward while rotating at a slower speed. 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 is paused 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 level, since a plurality of limiting blocks 29 are arranged in the spiral stirring tube 24, the spiral stirring tube 24 is divided into multiple levels, 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 levels are mutually fitted under the influence of the spring column 36, so that the liquid cannot flow, resulting in the liquid only flowing out through a specific position, and in the process of the threaded sleeve 210 moving, the hydraulic bag 22 will be squeezed, so that the liquid in the hydraulic bag 22 enters the other side of the liquid outlet control block 37 through the delivery pipe 34, 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 that flows out the flocculation liquid each time is different, so that the flocculation liquid can be discharged in a targeted manner, and the reaction is better; 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, and the driving motor is reversed to continuously stir it and remove the flocculation agent, thereby improving the recovery efficiency. After the reaction takes a certain period of time, the liquid that has been reacted and 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, but At this time, the guide sleeve 26 is restricted from moving under the action of controlling 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 limiting block 29 to limit the disc shape formed therein. Then, the electric telescopic rod is controlled to descend to expose 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 11 (in the previous flocculation stage, the recovery tank 11 is in a closed state). After being squeezed to a certain extent, the white mud at the bottom is recovered through the discharge port 15, thereby improving the recovery rate and recovery speed of the liquid and reducing the subsequent white mud processing steps.

[0036] 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 aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned 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 perform variable spraying of flocculation reagents, 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).

2. A chemical mechanical pulp white mud recovery device according to claim 1, characterized in that; The flocculation tank (1) is provided with a spiral guide groove (12), the bottom of the flocculation tank (1) is provided with a recovery groove (11), a diaphragm through which liquid can pass is provided in the recovery groove (11), a control electric telescopic rod (13) is provided at the end of the spiral guide groove (12), the bottom of the flocculation tank (1) is provided with a bottom plate (14), and a selectively openable discharge port (15) is provided on the bottom plate (14).

3. A chemical mechanical pulp white mud recovery device according to claim 2, characterized in that: 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).

4. A chemical mechanical pulp white mud recovery device according to claim 1, characterized in that; The variable flocculation stirring mechanism (2) comprises a screw (21), the screw (21) being arranged in a flocculation tank (1), and a driving motor being arranged on the top of the screw (21), a threaded sleeve (210) being arranged on the screw (21) for use therewith, the threaded sleeve (210) being a hollow structure, and a rotating plate (28) being arranged on the threaded sleeve (210), the rotating plate (28) being connected to a liquid inlet pipe (4), a spiral stirring tube (24) being arranged outside the threaded sleeve (210), the spiral stirring tube (24) being arranged with a plurality of liquid outlet holes, a guide sleeve (26) being arranged at the end of the spiral stirring tube (24), a guide ball being arranged on the side wall of the guide sleeve (26), the guide ball being arranged in contact with the spiral stirring tube (24), The guide sleeve (26) is used in conjunction with a 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) via 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 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); and an extrusion scraper (312) is provided at the bottom of the guide sleeve (26).

5. A chemical mechanical pulp white mud recovery device according to claim 4, characterized in that: The spiral stirring tube (24) is made of a plastic deformable material with recovery capability.

6. A chemical mechanical pulp white mud recovery device according to claim 4, characterized in that; The spiral stirring tube (24) is provided with a plurality of limiting blocks (29) for dividing the interior of the spiral stirring tube (24) into a plurality of spaces.

7. A chemical mechanical pulp white mud recovery device according to claim 1, characterized in that; The regulating mechanism (3) comprises a connecting pipe (31), the connecting pipe (31) being arranged beside the spiral stirring pipe (24), and the connecting pipe (31) and the spiral stirring pipe (24) being connected via a plurality of conveying pipes (34), the connecting pipe (31) being connected through the threaded sleeve (210), a guide rod (39) being arranged in the connecting pipe (31), a liquid outlet control block (37) being slidably connected to the guide rod (39), a liquid outlet through groove being arranged in the liquid outlet control block (37), and a magnetic force is arranged in the liquid outlet control block (37). The invention relates to a block (38), wherein the liquid outlet control block (37) is connected to the connecting pipe (31) via a spring column (36), the hydraulic bag (22) is connected to the connecting pipe (31) via a delivery pipe (34), each delivery pipe (34) is provided with a magnetic block (32), a liquid outlet control block (37) having a through hole is provided below the connecting block (35), and the liquid outlet control block (37) and the magnetic block (32) are connected via a connecting spring rod (33), and the magnetic block (32) and the magnetic block (38) are used in combination.

8. A chemical mechanical pulp white mud recovery device according to claim 8, characterized in that; The bottom of the connecting pipe (31) is in a planar shape, 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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