CN116328398A - A papermaking wastewater recovery device - Google Patents

Abstract

The invention discloses a papermaking wastewater recovery device in the technical field of wastewater treatment, and aims to solve the problem that in the prior art, when pulp fibers are recovered, the recovery device needs to stop working and take out a filter screen, and the device cannot continuously carry out treatment. The device comprises a working box and a collecting box, wherein a fixing mechanism for fixing a filter screen is arranged in the working box, a cleaning mechanism is arranged in the working box, and sealing blocks in sliding connection are arranged in through holes in a matching manner; the cleaning mechanism comprises an air cylinder, a movable block and a scraping plate, wherein the movable block is matched with the sealing block and can form a box body structure with a downward opening; the invention is suitable for wastewater treatment and recovery, the scraper scrapes and collects paper pulp fibers, after the movable block contacts with the scraper, the movable block and the scraper form a box body structure with a downward opening, after the movable block moves into the collecting box, the scraper rotates, the paper pulp fibers fall into the collecting box to finish recovery work, the filter screen is taken out without stopping work, and the device can continuously perform wastewater treatment work.

Description

A papermaking wastewater recovery device

technical field

The invention relates to a recovery device for papermaking wastewater, which belongs to the technical field of wastewater treatment.

Background technique

At present, papermaking wastewater refers to the wastewater generated during the pulping and papermaking process. The composition of papermaking wastewater is complex, containing a large amount of lignin, hemicellulose, sugars and other dissolved substances (residual alkali, inorganic salts, volatile acids, ammonia nitrogen, etc.), If it is discharged into the receiving water body without treatment, in addition to consuming dissolved oxygen and affecting the survival of aquatic organisms, it will also change the physiology and biochemistry of organisms, community results, and internal tissues, and is vulnerable to various harmful microorganisms. The quantity and quality of aquatic organisms declined. The composition of papermaking wastewater is complex. If it enters the post-stage biochemical treatment, it will destroy the biochemical system. Therefore, physical and chemical pretreatment is the key to the success of the papermaking wastewater treatment process. Moreover, papermaking wastewater is rich in pulping fibers, inorganic fillers and various chemical additives, and is a renewable resource. Recycling this part of pulp fibers can not only reduce the suspended solids in drainage, but also reuse the recovered pulp fibers in the production system. Reduces fiber loss.

When the existing papermaking wastewater recovery device recycles pulp fibers, it usually intercepts most of the pulp in the wastewater through the filter screen, and then needs to stop working and take out the filter screen to recycle the pulp on the filter screen. The device cannot Continuous processing work affects the processing efficiency of the device.

Contents of the invention

The purpose of the present invention is to overcome the deficiencies in the prior art, to provide a papermaking wastewater recycling device, to solve the problem that the papermaking wastewater recycling device needs to stop working and take out the filter screen when recycling pulp fibers, so that the pulp on the filter screen Recycling, the device cannot continue to perform processing work, which affects the processing efficiency of the device.

In order to solve the problems of the technologies described above, the present invention is achieved by adopting the following technical solutions:

The invention provides a recovery device for papermaking wastewater, comprising a working box and a collection box, the working box is provided with a fixing mechanism for fixing the filter screen, the working box and the collecting box are connected through a through hole, the working box A cleaning mechanism is provided in the box, a sealing block for sliding connection is matched in the through hole, and an extruding mechanism is arranged in the collection box; the cleaning mechanism includes a cylinder arranged in the working box, and the cylinder A movable block is provided at the output end of the movable block, and a scraper connected by rotation is arranged inside the movable block, and the scraper and the movable block are elastically connected by a first spring, and the scraper is used for cleaning the filter screen , the sealing block is elastically connected to the collection box through a third spring, the movable block is located on one side of the sealing block, the movable block matches the sealing block, and can form a box structure with the opening downward .

Further, the extruding mechanism includes a bracket slidably arranged on the inner wall of the collection box, and two sides of the inner wall of the bracket are symmetrically provided with sliding grooves, and a sliding block is provided in the sliding groove, and the sliding block is connected with the The chute is elastically connected by the second spring, a pressure roller connected in rotation is provided between the two sliders, a filter plate is provided below the pressure roller in the collection box, and a filter plate is provided in the collection box. The power mechanism used to drive the movement of the bracket.

Further, the fixing mechanism includes a frame, the frame is matched with the filter screen, a rotating shaft is provided in the frame, and the filter screen is sleeved on the outside of the rotating shaft and fixedly connected with the rotating shaft , the filter screen can be flipped inside the frame.

Further, a groove is provided at one end of the rotating shaft, and a connecting rod for rotational connection is provided on one side of the inner wall of the working box, and one end of the connecting rod extends to the outside of the working box and is provided with a handle. One end is provided with a limit block on the inner side of the working box, the limit block matches the groove, and the inner wall of the work box is provided with a limit block matching the limit block on one side of the limit block. Bit hole.

Further, it also includes a warning mechanism, the warning mechanism includes a switch arranged in the working box, the switch is located above the filter, and the inner wall of the working box is provided with a sliding block below the switch , the working box is provided with an alarm, and the alarm is electrically connected with the switch.

Further, the bottom of the fixing mechanism is provided with a lifting mechanism, the lifting mechanism includes a support block arranged at the bottom of the fixing mechanism, an electric telescopic rod is arranged in the working box, and the output end of the electric telescopic rod is connected to the The support block is fixedly connected, and is used to drive the support block to lift.

Further, the lifting mechanism is divided into two groups and arranged on both sides of the bottom of the fixing mechanism.

Further, the bottom of the working box is provided with an outlet pipe and a waste water pipe, and the bottom of the working box is provided with a slidingly connected baffle, and the baffle is provided with a push rod connected in rotation, and one end of the push rod is connected to one of the The supporting block is connected in rotation.

Further, an upper cover is detachably connected to the working box, a water inlet is opened on the upper cover, a grille is arranged above the filter screen in the working box, and an observation port is opened on the working box , The inner side of the viewing port is matched with a glass window.

Further, a drainage pipe is opened at the bottom of the collection box, and the drainage pipe communicates with the water outlet pipe.

Compared with the prior art, the beneficial effects achieved by the present invention are as follows:

1. The papermaking wastewater recovery device cooperates with the movable block, the scraper, the sealing block and the through hole. When it is necessary to recycle the pulp fibers on the top of the filter screen, the movable block and the scraper move towards the sealing block. The scraper is for The pulp fibers on the top of the filter screen are scraped off and collected. When the movable block contacts the scraper, the two form a box structure with the opening downward, preventing the newly falling waste water from washing away the pulp fibers collected by the scraper, ensuring that the device Excellent recycling effect, when the movable block moves to the inside of the collection box, the first spring pushes the scraper to rotate, and the pulp fibers fall into the inside of the collection box due to gravity, and the recycling work is completed, and the filter screen can be taken out without stopping the work, and the device can be carried out continuously Wastewater treatment ensures the working efficiency of the device. When the device recycles pulp fibers, it alternately seals the through-hole through the movable block and the sealing block, so as to prevent excessive waste water from entering the interior of the collection box through the through-hole and avoid It affects the recovery effect of the collection box;

2. Through the cooperation of the limit block, the handle and the groove, the present invention can turn over the filter screen. When the waste water continues to pass through the filter screen, it can recoil the filter screen, thereby avoiding the filter screen from being blocked and ensuring the safety of the device. work effect;

3. In the present invention, when the waste water accumulated on the filter reaches a certain level, the floating block contacts the switch upwards, so that the alarm starts to work and reminds the staff that the filter is blocked. At this time, the filter can be turned over to ensure the safety of the filter. The stability of the device during operation;

4. The present invention cooperates with the push rod, the baffle and the waste water pipe to prevent unfiltered waste water and waste water containing more paper fibers from flowing out of the water outlet pipe, thereby ensuring the filtration and recovery effect of the device on waste water.

Description of drawings

Fig. 1 is a schematic cross-sectional front view of a papermaking wastewater recovery device provided according to an embodiment of the present invention;

Fig. 2 is the enlarged schematic diagram of place A in Fig. 1;

Fig. 3 is the enlarged schematic diagram of place B in Fig. 1;

Fig. 4 is the enlarged schematic diagram of place C in Fig. 1;

Fig. 5 is a front sectional schematic diagram of a bracket provided according to an embodiment of the present invention;

Fig. 6 is a side view structural schematic diagram of a frame provided according to an embodiment of the present invention;

Fig. 7 is a schematic front view of a papermaking wastewater recovery device according to an embodiment of the present invention.

In the figure: 1. Working box; 2. Filter screen; 3. Collection box; 4. Through hole; 5. Sealing block; 6. Cylinder; 7. Movable block; 8. Scraper; 9. First spring; 10. Bracket; 11, pressure roller; 12, filter plate; 13, chute; 14, slider; 15, second spring; 16, frame; 17, rotating shaft; 18, groove; 19, connecting rod; 20, handle; 21, limit block; 22, limit hole; 23, switch; 24, floating block; 25, alarm; 26, the third spring; 27, support block; 28, electric telescopic rod; 29, outlet pipe; 30, Wastewater pipe; 31, baffle; 32, push rod; 33, upper cover; 34, grille; 35, drainage pipe; 36, observation port; 37, glass window.

Detailed ways

The present invention will be further described below in conjunction with the accompanying drawings. The following examples are only used to illustrate the technical solution of the present invention more clearly, but not to limit the protection scope of the present invention.

In describing the present invention, it should be understood that the terms "center", "longitudinal", "transverse", "upper", "lower", "front", "rear", "left", "right", " The orientations or positional relationships indicated by "vertical", "horizontal", "top", "bottom", "inner" and "outer" are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and Simplified descriptions, rather than indicating or implying that the device or element referred to must have a particular orientation, be constructed and operate in a particular orientation, and thus should not be construed as limiting the invention. In addition, the terms "first", "second", etc. are used for descriptive purposes only, and should not be understood as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, a feature defined as "first", "second", etc. may expressly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connected, or integrally connected; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention based on specific situations.

As shown in Fig. 1-7, the present invention provides a kind of papermaking waste water recovery device, comprises working box 1 and collecting box 3, and described working box 1 is provided with fixing mechanism for fixing filter screen 2, described working box 1 It is connected with the collection box 3 through a through hole 4, a cleaning mechanism is provided in the working box 1, a sealing block 5 for sliding connection is matched in the through hole 4, and an extruding mechanism is provided in the collection box 3 ; The cleaning mechanism includes a cylinder 6 located in the working box 1, the output end of the cylinder 6 is provided with a movable block 7, and the movable block 7 is provided with a scraper 8 connected in rotation, and the scraper 8 is elastically connected to the movable block 7 through the first spring 9, the scraper 8 is used to clean the filter screen 2, the sealing block 5 is elastically connected to the collection box 3 through the third spring 26, The movable block 7 is located on one side of the sealing block 5, and the movable block 7 is matched with the sealing block 5 to form a box structure with the opening downward; the working box 1 is detachably connected with an upper cover 33, the upper cover 33 is provided with a water inlet, the working box 1 is provided with a grille 34 above the filter screen 2, and the working box 1 is provided with an observation port 36, and the inner side of the observation port 36 Matching is provided with glass windows 37 .

Specifically, the waste water to be treated is input into the inside of the working box 1 through the water inlet, and then the waste water is filtered through the filter screen 2. The filter screen 2 intercepts most of the pulp fibers in the waste water, and the filtered waste water passes through the outlet pipe 29 After the device has been working for a period of time, some pulp fibers have accumulated on the top of the filter screen 2. When it needs to be recovered, the cylinder 6 starts to work and pushes the movable block 7 toward the seal. The block 5 approaches, the first spring 9 pushes the scraper 8 into close contact with the top of the filter screen 2, and the scraper 8 moves with the movable block 7, thereby cleaning the pulp fibers on the top of the filter screen 2 and driving the pulp The fibers move toward the sealing block 5. When the movable block 7 contacts the sealing block 5, a box structure with the opening downward can be formed to prevent the waste water from washing away the pulp fibers collected by the scraper 8 and affect the recycling work of the device. The scraper 8 is located below the box structure, the cylinder 6 continues to work, and pushes the movable block 7 to move to the inside of the through hole 4, and the third spring 26 is compressed. At this time, the movable block 7 replaces the sealing block 5 to block the through hole 4 , to avoid excessive waste water entering the interior of the collection box 3 through the through hole 4, the cylinder 6 continues to push the movable block 7 towards the collection box 3, and when part of the movable block 7 moves to the interior of the collection box 3, the filter screen 2 And the through hole 4 no longer blocks the scraper 8, the first spring 9 pushes the scraper 8 to rotate downward, so that the scraped pulp fibers on the filter screen 2 fall into the inside of the collection box 3 for collection, thereby completing the pulp Fiber recovery work; then the cylinder 6 drives the movable block 7 to return to its original position, the through hole 4, the filter screen 2 contacts the scraper 8, thereby pushing the scraper 8 to move back to the inner side of the movable block 7, the first spring 9 is compressed, In order to facilitate the next cleaning work, the third spring 26 pushes the sealing block 5 back to its original position, and when the device recovers the pulp fibers, the through hole 4 is always in a sealed state.

The present invention cooperates with the movable block 7, the scraper 8, the sealing block 5 and the through hole 4. When it is necessary to recycle the pulp fibers on the top of the filter screen 2, the movable block 7 and the scraper 8 approach the sealing block 5 to scrape The plate 8 scrapes and collects the pulp fibers on the top of the filter screen 2. When the movable block 7 contacts the scraper 8, the two form a box structure with the opening downward, preventing the newly falling waste water from collecting the pulp collected by the scraper 8. The fibers are washed away to ensure the recovery effect of the device. When the movable block 7 moves to the inside of the collection box 3, the first spring 9 pushes the scraper 8 to rotate, and the pulp fibers fall into the inside of the collection box 3 due to gravity, and the recovery work is completed. There is no need to stop the work to take out the filter screen 2, and the device can continuously carry out wastewater treatment, which ensures the working efficiency of the device; when the device recycles pulp fibers, the through hole 4 is alternately sealed through the movable block 7 and the sealing block 5, In this way, excessive waste water is prevented from entering the interior of the collection box 3 through the through hole 4, and the recovery effect of the collection box 3 is prevented from being affected.

In one embodiment, the extruding mechanism includes a bracket 10 slidably arranged on the inner wall of the collection box 3, and two sides of the inner wall of the bracket 10 are symmetrically provided with chute 13, and the chute 13 is provided with a sliding connection. Block 14, the slider 14 is elastically connected to the chute 13 through the second spring 15, a pressure roller 11 that is rotatably connected is provided between the two sliders 14, and the collection box 3 is inside the pressure roller. A filter plate 12 is provided under the roller 11, and a power mechanism for driving the support 10 is provided inside the collecting box 3.

Specifically, after the pulp fiber falls into the inside of the collection box 3, the pulp fiber accumulates above the filter plate 12, the second spring 15 pushes the slide block 14 to move towards the filter plate 12, and the chute 13 guides the slide block 14 function, the pressure roller 11 moves with the slider 14, so that the second spring 15 pushes the pressure roller 11 into close contact with the filter plate 12, and then the power mechanism starts to work, driving the bracket 10 to move left and right, and the pressure roller 11 moves along with the bracket 10 movement, the second spring 15 pushes the pressure roller 11 to move downward, so that the paper fibers on the top of the filter plate 12 are tightly squeezed, and the squeezed water falls to the bottom of the filter plate 12, so as to facilitate the pulp fiber Recycling works.

One embodiment, the fixing mechanism includes a frame 16, the frame 16 is matched with the filter screen 2, the frame 16 is provided with a rotating shaft 17 connected in rotation, and the filter screen 2 is sleeved on the rotating shaft 17 and is fixedly connected with the rotating shaft 17, the filter screen 2 can be flipped inside the frame 16, a groove 18 is provided at one end of the rotating shaft 17, and a rotating connection is provided on one side of the inner wall of the working box 1 The connecting rod 19, one end of the connecting rod 19 extends to the outside of the working box 1 and is provided with a handle 20, and the other end of the connecting rod 19 is provided with a limiting block 21 inside the working box 1, and the limiting The block 21 is matched with the groove 18 , and the inner wall of the working box 1 is provided with a limit hole 22 matched with the limit block 21 on one side of the limit block 21 .

Specifically, as the work progresses, some impurities and paper fibers will be stuck inside the filter screen 2, causing blockage to the filter screen 2 and affecting its filtering effect. When it is necessary to deal with the blockage of the filter screen 2, you can The lifting mechanism drives the fixing mechanism to move downward, thereby reserving space for the overturning of the filter screen 2. When the frame 16 moves downward to the required position, the groove 18 on the rotating shaft 17 is located at one side of the limit hole 22. At this time, the handle 20 can be pushed towards the working box 1, and the connecting rod 19 and the stop block 21 move with the handle 20, so that the stop block 21 moves to the inside of the groove 18, and the two engage with each other. At this time, the handle 20 is driven to rotate, thereby driving the limit block 21 to rotate, and the groove 18 and the rotating shaft 17 are rotated thereupon, thereby driving the filter screen 2 to rotate, and after the filter screen 2 is turned over 180°, the drive handle 20 is away from the work Box 1, thereby driving the limit block 21 to move to the inside of the limit hole 22 for placement, after the lifting mechanism drives the frame 16 to return to its original position, when the waste water continues to pass through the filter screen 2, the filter screen 2 can be recoiled, thereby Prevent the filter screen 2 from being blocked, and ensure the working effect of the device.

An embodiment also includes a warning mechanism, the warning mechanism includes a switch 23 arranged in the working box 1, the switch 23 is located above the filter screen 2, and the inner wall of the working box 1 is connected to the switch 23 A sliding block 24 is provided below, and an alarm 25 is provided on the working box 1 , and the alarm 25 is electrically connected to the switch 23 .

Specifically, when the filter screen 2 is clogged, the filtering work of the filter screen 2 becomes worse, causing the waste water to be filtered faster than the waste water is added, and the waste water will accumulate on the top of the filter screen 2. , the waste water accumulated on the filter screen 2 increases, causing the liquid level of the waste water to rise. , Floater 24 contacts with switch 23 upwards, thereby alarm 25 is started to work, reminds the staff that filter screen 2 is blocked, can carry out overturning work for filter screen 2 this moment, has guaranteed the stability during device work.

One embodiment, the bottom of the fixing mechanism is provided with a lifting mechanism, the lifting mechanism includes a support block 27 arranged at the bottom of the fixing mechanism, an electric telescopic rod 28 is arranged in the working box 1, and the electric telescopic The output end of the rod 28 is fixedly connected with the support block 27 for driving the support block 27 to lift.

During use, when it is necessary to drive the frame 16 to lift, the electric telescopic rod 28 starts to work, drives the support block 27 to move, and the frame 16 moves along with the support block 27, thereby completing the lifting work; optionally, the lifting mechanism is The two groups are arranged separately on both sides of the bottom of the fixing mechanism, which ensures the stability of the frame 16 when it is raised and lowered.

One embodiment, the bottom of the working box 1 is provided with a water outlet pipe 29 and a waste water pipe 30, the bottom of the working box 1 is provided with a baffle plate 31 which is slidingly connected, and the baffle plate 31 is provided with a push rod 32 connected in rotation One end of the push rod 32 is rotatably connected to one of the support blocks 27; a drain pipe 35 is provided at the bottom of the collection box 3, and the drain pipe 35 communicates with the outlet pipe 29.

Specifically, when working normally, the waste water filtered by the filter screen 2 flows out through the outlet pipe 29; when the filter screen 2 needs to be turned over, the electric telescopic rod 28 drives the support block 27 and the frame 16 to move downward. The block 27 drives the push rod 32 to move, and the push rod 32 pushes the baffle plate 31 to move to the side of the water outlet pipe 29, and cancels the blockage of the waste water pipe 30. At this time, the waste water flows out through the waste water pipe 30. When the filter screen 2 is turned over , the accumulated waste water on the filter screen 2 and the newly added waste water will flow down directly without filtering, so it is collected through the waste water pipe 30 to prevent it from flowing out through the outlet pipe 29, which ensures the working effect of the device. When the filter screen 2. After turning over, the frame 16 stays for a period of time. At this time, the waste water passes through the filter screen 2 and recoils it, and the washed down paper fibers are collected through the waste water pipe 30. After recoiling for a period of time, the electric telescopic rod 28 drives Frame 16 returns to its original position upwards, and support block 27 drives baffle plate 31 to return to its original position. At this time, waste water pipe 30 is blocked, and the blockage of water outlet pipe 29 is canceled to restore normal waste water filtration work. The present invention passes push rod 32, baffle plate 31 cooperates with the waste water pipe 30 to prevent unfiltered waste water and waste water containing more paper fibers from flowing out from the outlet pipe 29, ensuring the filtering and recovery effect of the device for waste water, and the waste water squeezed out of the collection box 3 can pass through the outlet pipe 29. Water pipe 29 flows out.

Said work box 1 is detachably connected with a loam cake 33, said loam cake 33 is provided with a water inlet, said work box 1 is provided with a grid 34 above said filter screen 2, said work box 1 An observation port 36 is opened, and a glass window 37 is provided on the inner side of the observation port 36 .

Specifically, the grille 34 is used to block the excessive impurities in the waste water, and the upper cover 33 is used to facilitate the maintenance of the working box 1. When the filter screen 2 is turned over, the viewing port 36 and the glass window 37 can be viewed. , to observe the flip angle of the filter screen 2, to avoid tilting the position of the filter screen 2, the relatively small angle difference of the filter screen 2, when the frame 16 returns to its original position, when the movable block 7 contacts the filter screen 2, the movable block 7 The angle of the filter screen 2 can be adjusted to a certain extent to ensure the working effect of the device.

The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the technical principle of the present invention, some improvements and modifications can also be made. It should also be regarded as the protection scope of the present invention.

Claims (10)

1. a papermaking waste water recycling device is characterized in that it comprises a work box (1) and a collection box (3), and the work box (1) is provided with a fixing mechanism for fixing the filter screen (2), and the work The box (1) and the collection box (3) are connected through a through hole (4), a cleaning mechanism is provided in the working box (1), and a sealing block ( 5), the collection box (3) is provided with an extrusion mechanism; The cleaning mechanism includes a cylinder (6) arranged in the working box (1), the output end of the cylinder (6) is provided with a movable block (7), and a rotating connection is arranged in the movable block (7). The scraper (8), the scraper (8) is elastically connected to the movable block (7) through the first spring (9), and the scraper (8) is used to carry out the filter screen (2) Cleaning, the sealing block (5) is elastically connected with the collection box (3) through the third spring (26), the movable block (7) is located at one side of the sealing block (5), and the movable block ( 7) Matching with the sealing block (5), it can form a box structure with the opening downward. 2. A kind of papermaking wastewater recovery device according to claim 1, characterized in that, the extrusion mechanism includes a bracket (10) slidingly arranged on the inner wall of the collection box (3), and the inner wall of the bracket (10) Two sides are provided with chute (13) symmetrically, and described chute (13) is provided with the slide block (14) of sliding connection, and described slide block (14) and described chute (13) pass second spring ( 15) Elastic connection, between the two sliders (14) there is a pressure roller (11) that is rotationally connected, and a filter plate (12) is provided below the pressure roller (11) in the collection box (3). ), the collection box (3) is provided with a power mechanism for driving the movement of the support (10). 3. A kind of papermaking wastewater recycling device according to claim 1, characterized in that, said fixing mechanism comprises a frame (16), and said frame (16) is matched with said filter screen (2), and said frame (16) is provided with a rotating shaft (17) that is rotatably connected, and the filter screen (2) is sleeved on the outside of the rotating shaft (17) and is fixedly connected with the rotating shaft (17). The filter screen (2) can The inversion takes place on the inside of the frame (16). 4. A papermaking waste water recycling device according to claim 3, characterized in that a groove (18) is provided at one end of the rotating shaft (17), and a rotating connection is provided on one side of the inner wall of the working box (1). A connecting rod (19), one end of the connecting rod (19) extends to the outside of the working box (1) and is provided with a handle (20), and the other end of the connecting rod (19) is connected to the working box (1) The inner side is provided with a limit block (21), and the limit block (21) is matched with the groove (18). The limit hole (22) matched with the limit block (21). 5. A kind of papermaking waste water recovery device according to claim 1, is characterized in that, also comprises warning mechanism, and described warning mechanism comprises the switch (23) that is arranged in described working box (1), and described switch ( 23) Located above the filter screen (2), the inner wall of the working box (1) is provided with a sliding block (24) connected below the switch (23), and the working box (1) is provided with an alarm device (25), and the alarm device (25) is electrically connected with the switch (23). 6. A kind of papermaking wastewater recycling device according to claim 1, characterized in that, the bottom of the fixing mechanism is provided with a lifting mechanism, and the lifting mechanism includes a support block (27) arranged at the bottom of the fixing mechanism, The working box (1) is provided with an electric telescopic rod (28), and the output end of the electric telescopic rod (28) is fixedly connected with the support block (27) for driving the support block (27) to carry out lift. 7. A papermaking waste water recycling device according to claim 6, characterized in that, the lifting mechanisms are in two groups and are respectively arranged on both sides of the bottom of the fixing mechanism. 8. A kind of papermaking wastewater recycling device according to claim 7, characterized in that, the bottom of the working box (1) is provided with an outlet pipe (29) and a waste water pipe (30), and the bottom of the working box (1) A baffle plate (31) for sliding connection is provided, and a push rod (32) for rotatable connection is provided on the baffle plate (31), and one end of the push rod (32) is rotatably connected to one of the support blocks (27) . 9. A papermaking wastewater recovery device according to claim 1, characterized in that, the working box (1) is detachably connected with an upper cover (33), and the upper cover (33) is provided with a water inlet , the working box (1) is provided with a grid (34) above the filter screen (2), the working box (1) is provided with an observation port (36), and the inside of the observation port (36) Matching is provided with glass windows (37). 10. A kind of papermaking wastewater recovery device according to claim 8, characterized in that, the bottom of the collection box (3) is provided with a drainpipe (35), and the drainpipe (35) is connected to the outlet pipe ( 29) Connected.

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