CN216765410U - Improved multi-net pulp thickener - Google Patents

Abstract

The utility model discloses an improved multi-net pulp thickening machine. A filtering device comprises an upper filter screen, a middle filter screen and a lower filter screen which are connected end to end from top to bottom and are installed on a frame in an inclined manner. The direction is opposite to the inclination direction of the upper filter screen, the inclination direction of the upper filter screen is the same as that of the lower filter screen, the filtering accuracy of the upper filter screen is less than that of the middle filter screen, and the filtering accuracy of the middle filter screen Filtration accuracy, the pulp collecting device is provided with at least three pulp collecting boxes. The three pulp collecting boxes are respectively installed under the upper filter screen, the middle filter screen and the lower filter screen. The pulp device is located on the same side of the upper screen. Triple filtration, high concentration, faster slurry supply, fast concentration, good concentration effect, slow down the clogging of the filter screen, reduce the frequency of cleaning the filter screen, backwash the filter screen through the filter screen backwashing device, no need to disassemble and flush, More convenient to use.

Description

An improved multi-wire pulp thickener

technical field

The utility model relates to the technical field of thickeners, in particular to an improved multi-net pulp thickener.

Background technique

In papermaking, thickeners are often required to strip the moisture in the pulp to increase the concentration of the pulp. The oblique vertical screen-frame recycling method is one of the methods for slurry concentration. The traditional oblique screen-frame thickener will require concentrated pulp. It slides down from the upper end of the filter screen to the lower end by gravity. When the water in the slurry passes through the filter screen, it penetrates down from the filter screen, and the slurry after peeling off the water is isolated on the filter screen, and relies on the inclination of the filter screen to fall by gravity. Into the slurry storage mechanism below, the water in the slurry is stripped by gravity, the machine structure is simple, the energy consumption is low, but the stripping speed is often slow; the slurry falls only by gravity, and part of the slurry is often on the filter screen. Residual, long-term use will cause the slurry to block the filter screen, and the filter screen needs to be cleaned regularly, which is inconvenient to use, so it is necessary to improve it.

Utility model content

Aiming at the deficiencies of the prior art, the purpose of the present invention is to provide an improved multi-wire pulp thickener with simple structure, low cost, good concentration effect, high speed, automatic backwashing and convenient use.

In order to achieve the above purpose, the technical scheme adopted by the present utility model is: an improved multi-wire pulp thickener, comprising a frame, a filter device, a pulp supply device, a pulp collection device and a water collection device, and the filter device is installed on the frame , the pulp feeding device is installed on the upper end of the frame, the pulp collecting device and the water collecting device are respectively installed on the frame below the filter device, and the filter device includes an upper filter which is connected end to end from top to bottom and is installed obliquely on the frame in turn. Net, middle filter and lower filter, the inclination direction of the middle filter is opposite to that of the upper filter, the inclination of the upper filter is the same as that of the lower filter, and the filtering accuracy of the upper filter is smaller than that of the middle filter The filtration precision of the middle filter is less than that of the lower filter.

The pulp supply device is installed at the top of the frame, and the pulp supply device is located on one side of the upper filter screen.

The pulp collecting device is provided with at least three pulp collecting boxes. The three pulp collecting boxes are respectively installed under the upper filter screen, the middle filter screen and the lower filter screen. The pulp collecting box installed under the upper filter screen and the pulp supply device are located at on the same side of the filter,

The water collection device is provided with a water collection tray and a water delivery pipe, the water collection tray is installed at the bottom of the frame, the water collection tray is located just below the filtering device, and the water delivery pipe is connected with the water collection tray.

In a further solution, the pulp feeding device includes a pulp laying pipe, a pulp feeding pipe and a pulp feeding pump, the pulp laying pipe is arranged along the lateral direction of the upper filter screen, and the pulp laying pipe and the pulp collecting box installed under the upper filter screen are located on the upper side. On the same side of the filter screen, the side of the slurry pipe facing the upper filter screen is provided with a slurry outlet along the length of the slurry pipe. The slurry supply pump is installed on the slurry supply pipe, and the slurry supply pipe is connected with the slurry pipe to realize the The slurry is spread evenly on the filter screen.

In a further scheme, the upper filter screen and the lower filter screen are arranged in parallel, the upper end of the middle filter screen is connected to the lower end of the upper filter screen, the lower end of the middle filter screen is connected to the upper end of the lower filter screen, and the clip feet of the upper filter screen and the middle filter screen are: 60°～150°, the clip between the middle filter and the lower filter is the same as the clip between the middle filter and the upper filter.

In a further solution, the pulp collecting device includes a pulp outlet pipe, three pulp collecting boxes and several pulp box connecting pipes. The three pulp collecting boxes are respectively installed under the upper filter screen, the middle filter screen and the lower filter screen, and the pulp is discharged. The pipe is installed vertically on one side of the frame, the bottom surface of the pulp box has a slope inclined towards the pulp outlet pipe, one end of each pulp box connecting pipe is connected to the lowest position of the bottom surface of each pulp box, and each pulp box connecting pipe The other end of the slurry outlet pipe is connected to a slurry outlet pipe, and a slurry storage tank is connected to the bottom of the slurry outlet pipe.

In a further scheme, the water collecting tray is in the shape of a funnel, the water delivery pipe is installed at the bottom of the water collecting tray, and a filter screen is movably installed in the middle of the water collecting tray to filter the peeled white water.

In a further scheme, the multi-screen concentrator is also provided with a filter screen backwashing device,

The filter screen backwashing device includes an upper spray pipe, a middle spray pipe, a lower spray pipe, a water inlet pipe and a flushing pump. The upper spray pipe is arranged between the upper filter screen and the middle filter screen, and the middle spray pipe is arranged in the middle Between the filter screen and the lower filter screen, the lower water spray pipe is arranged below the lower filter screen and is located on the same side of the frame as the upper water spray pipe.

The upper water spray pipe, the middle water spray pipe and the lower water spray pipe are respectively provided with a number of nozzles along the length direction. The bottom surface, the nozzle of the lower water spray pipe faces the bottom surface of the lower filter screen,

The water inlet pipe is installed on one side of the frame, and the water inlet pipe is respectively connected with the upper water spray pipe, the middle water spray pipe and the lower water spray pipe, and the flushing pump is installed on the water inlet pipe to realize the pressurization of the water inlet pipe.

In a further scheme, one end of the water delivery pipe is connected to the bottom of the water collecting tray, the other end of the water delivery pipe is connected to a water storage tank, a water outlet is provided at the lower part of the water storage tank, and the water inlet pipe is connected with the water outlet to realize the recycling of the stripped water. White water backflush the filter unit.

In a further solution, the upper water spray pipe, the middle water spray pipe and the lower water spray pipe are rotatably installed on the rack, and three water spray pipes are arranged on one side of the rack for driving the upper water spray pipe, the middle water spray pipe and the lower water spray pipe. The rotating drive motor, the three drive motors are respectively connected to the upper water spray pipe, the middle water spray pipe and the lower water spray pipe;

The upper water spray pipe, the middle water spray pipe and the lower water spray pipe are respectively connected with the water inlet pipe through three water spray connection pipes, and the water spray connection pipes are made of hoses.

In a further scheme, the slurry discharge pipe is also connected with a sewage pipe, the sewage pipe is provided with a sewage valve, and the slurry discharge pipe is provided with a slurry valve, and the slurry valve is located between the sewage pipe and the slurry storage tank. The valve opens, and the blowdown valve opens when the slurry valve is closed.

In a further scheme, the sewage discharge pipe is also provided with a sewage filter mechanism, the sewage filter mechanism includes two connecting flanges and a sealing gasket, the two connecting flanges are flanged, and the sealing gasket is clamped between the two connecting flanges, A filter screen is arranged in the middle of the sealing gasket.

After adopting the above structure, the advantages of the present invention compared with the prior art are: the slurry is triple filtered through the upper filter, the middle filter and the lower filter, the concentration is high, the upper filter, the middle filter Different from the filter precision of the lower filter, larger fibers are quickly filtered through the upper filter, medium-sized fibers are filtered through the middle filter, and fine fibers are filtered through the lower filter, which is convenient for the papermaking process. The proportion of fibers of different sizes is mixed to control the strength and toughness of the paper; the fiber loss is less, and the output is increased while reducing the cost. The frequency of cleaning the filter screen is reduced, and the filter screen is reversely flushed through the filter screen backwashing device, which does not need to be manually disassembled and washed, which is more convenient to use.

Description of drawings

The present utility model will be further described below in conjunction with the accompanying drawings and embodiments.

Fig. 1 is the structural representation of the present utility model;

Fig. 2 is the sectional view of the present utility model;

3 is a schematic structural diagram of the filter screen backwashing device and the filtering device of the present invention.

In the picture:

1 rack;

21 upper filters, 22 middle filters, 23 lower filters;

31 slurry pipe, 32 slurry supply pipe, 33 slurry supply pump;

41 pulp pipe, 42 pulp box, 43 pulp box connecting pipe, 44 pulp storage tank, 45 sewage pipe, 46 sewage valve, 47 pulp valve, 48 sewage filter mechanism;

51 water collecting tray, 52 water delivery pipe, 53 filter residue screen;

61 upper water spray pipe, 62 middle water spray pipe, 63 lower water spray pipe, 64 water inlet pipe, 65 flushing pump, 66 spray head, 67 water storage tank, 68 water spray connection pipe.

Detailed ways

The following are only preferred embodiments of the present invention, and do not limit the protection scope of the present invention.

An improved multi-wire pulp thickener, as shown in Figures 1 to 3, includes a frame 1, a filter device, a pulp supply device, a pulp collection device and a water collection device, the filter device is installed on the frame 1, and the pulp supply device Installed on the upper end of the frame 1, the pulp collecting device and the water collecting device are respectively installed on the frame 1 and located below the filter device. 21. The middle filter screen 22 and the lower filter screen 23, the inclination direction of the middle filter screen 22 is opposite to the inclination direction of the upper filter screen 21, the inclination direction of the upper filter screen 21 is the same as that of the lower filter screen 23, and the upper filter screen 21 The filtration accuracy of the upper filter screen 22 is smaller than that of the middle filter screen 22, and the filtration accuracy of the middle filter screen 22 is smaller than that of the lower filter screen 23. The pulp collecting device is provided with at least three pulp collecting boxes 42. The three pulp collecting boxes 42 are respectively installed under the upper filter screen 21, the middle filter screen 22 and the lower filter screen 23. The pulp box 42 and the pulp supply device are located on the same side of the upper filter screen 21. The water collecting device is provided with a water collecting tray 51 and a water delivery pipe 52. Right below, the water delivery pipe 52 is connected to the water collecting pan 51 .

The traditional oblique frame type thickener has only one filter screen, the concentration speed is slow, and a small part uses multiple filter screens, and each filter screen is placed in parallel horizontally. The filter screen is filtered and concentrated at the same time, and cannot be filtered step by step. The volume of the whole machine is large, and the concentration speed depends on the number of filter screens. The utility model filters the slurry through the upper filter screen 21, the middle filter screen 22 and the lower filter screen 23. , the concentration is high, the filtering precision of the upper filter screen 21, the middle filter screen 22 and the lower filter screen 23 are different, the larger fibers are quickly filtered through the upper filter screen 21, the medium-sized fibers are filtered through the middle filter screen 22, and The filter screen 23 filters fine fibers, which is convenient to mix fibers of different sizes according to needs and proportions in the papermaking process to control the strength and toughness of the paper; the fiber loss is small, and the output is increased while reducing the cost. The pulp feeding speed of the pulp feeding device Faster, faster concentration, better concentration effect, slow down the blockage of the filter screen, reduce the frequency of cleaning the filter screen, backwash the filter screen through the filter screen backwashing device, without manual disassembly and washing, and it is more convenient to use.

Specifically, the slurry supply device includes a slurry pipe 31 , a slurry pipe 32 and a slurry pump 33 . The slurry pipe 31 is arranged along the lateral direction of the upper filter screen 21 . The pulp collecting box 42 is located on the same side of the upper filter screen 21, the pulp pipe 31 is provided with a pulp outlet along the length direction of the pulp pipe 31 on the side of the pulp pipe 31 facing the upper filter screen 21, and the pulp supply pump 33 is installed on the pulp supply pipe 32. The slurry supply pipe 32 is connected with the slurry laying pipe 31 so as to spread the slurry evenly on the upper filter screen 21 . The slurry supply pump 33 applies pressure to the slurry in the slurry supply pipe 32, so that the slurry fills the slurry spreading pipe 31. After the slurry fills the slurry spreading pipe 31, the slurry gradually and uniformly overflows from the slurry outlet of the slurry spreading pipe 31 to the upper filter. Net 21.

Specifically, the upper filter screen 21 and the lower filter screen 23 are arranged in parallel, the upper end of the middle filter screen 22 is connected to the lower end of the upper filter screen 21, the lower end of the middle filter screen 22 is connected to the upper end of the lower filter screen 23, and the upper filter screen 21 and the middle filter screen are connected. The clamping feet of the net 22 are 60°˜150°, and the clamping feet between the middle filter screen 22 and the lower filter screen 23 are the same as those between the middle filter screen 22 and the upper filter screen 21 . By changing the angle between the upper filter screen 21, the middle filter screen 22 and the lower filter screen 23 and the bottom surface, the speed at which the slurry stays on each filter screen is controlled. The longer the stay time, the better the concentration effect, but the faster the concentration speed Slowly, preferably, the clamping feet of the upper filter screen 21 and the middle filter screen 22 are 90°～120°, that is, the angle between the upper filter screen 21, the middle filter screen 22 and the lower filter screen 23 and the bottom surface is 45°～120° 60°, while ensuring the concentration effect, the concentration speed is increased to achieve the best balance point.

Specifically, the pulp collecting device includes a pulp outlet pipe 41 , three pulp collecting boxes 42 and several pulp box connecting pipes 43 , and the three pulp collecting boxes 42 are respectively installed on the upper filter screen 21 , the middle filter screen 22 and the lower filter screen 23 Below, the pulp outlet pipe 41 is vertically installed on one side of the frame 1, the bottom surface of the pulp collecting box 42 has a slope inclined towards the pulp outlet pipe 41, and one end of each pulp box connecting pipe 43 is connected to each pulp collecting box 42 respectively. The lowest position of the bottom surface of each pulp box connecting pipe 43 is connected to the pulp outlet pipe 41, and the bottom of the pulp outlet pipe 41 is connected to a pulp storage tank 44. Due to the poor fluidity of the concentrated slurry, the slurry is gathered at the lowest position of the pulp collecting box 42 through a certain slope, so that the pulp box connecting pipe 43 flows into the pulp outlet pipe 41 and flows out through gravity, without using a pump to extract the pulp collecting box The slurry in 42 has simple structure, low cost and low energy consumption. Preferably, three slurry storage tanks 44 are provided, and each slurry storage tank 44 is connected to a slurry collection box 42, so as to obtain slurry with different degrees of concentration.

Specifically, the water collecting tray 51 is in the shape of a funnel, the water delivery pipe 52 is installed at the bottom of the water collecting tray 51, and a filter screen 53 is movably installed in the middle of the water collecting tray 51 to filter the peeled white water. The funnel-shaped water collecting tray 51 gathers the stripped white water to the water delivery pipe 52 and discharges it through the water delivery pipe 52. When the water collecting tray 51 receives the stripped white water, the white water passes through the filter slag net 53 before entering the water delivery pipe 52 to prevent environmental pollution. The large particle pollutants enter the water pipe 52. Preferably, a layer of filter cloth is laid on the upper surface of the filter residue screen 53, and the large particles of pollutants falling on the filter residue screen 53 are cleaned by replacing or cleaning the filter cloth.

Specifically, the multi-screen concentrator is also equipped with a filter screen backwashing device. The traditional oblique screen frame type thickener is easy to block the filter screen, and the cleaning frequency is high. After the number of filter screens increases, the cleaning workload is large, and the use is inconvenient. The screen backwashing device reversely flushes the filter screen without manual manual disassembly and flushing, which is more convenient to use.

The filter screen backwashing device includes an upper water spray pipe 61, a middle water spray pipe 62, a lower water spray pipe 63, a water inlet pipe 64 and a flushing pump 65. The upper water spray pipe 61 is arranged between the upper filter screen and the middle filter screen. The water spray pipe 62 is arranged between the middle filter screen 22 and the lower filter screen 23. The lower water spray pipe 63 is arranged below the lower filter screen 23 and is located on the same side of the frame 1 as the upper water spray pipe 61. The upper water spray pipe 61. The middle water spray pipe 62 and the lower water spray pipe 63 are respectively provided with a number of spray heads 66 along their length directions. The spray head 66 of the upper water spray pipe 61 faces the bottom surface of the upper filter screen 21. Facing the bottom surface of the middle filter screen 22, the nozzle 66 of the lower water spray pipe 63 faces the bottom surface of the lower filter screen 23, the water inlet pipe 64 is installed on one side of the frame 1, and the water inlet pipe 64 is respectively connected with the upper water spray pipe 61, the middle water spray The pipe 62 is connected to the lower water spray pipe 63 , and the flushing pump 65 is installed on the water inlet pipe 64 to pressurize the water inlet pipe 64 .

The flushing pump 65 pressurizes the water inlet pipe 64, so that the flushing water in the water inlet pipe 64 enters the upper water spray pipe 61, the middle water spray pipe 62 and the lower water spray pipe 63 respectively, and is sprayed from each of the nozzles 66. By adjusting the flushing The power of the pump 65 controls the size of the water pressure, and the spray head 66 sprays the flushing water on the bottom surfaces of the upper filter screen, the middle filter screen and the lower filter screen respectively, and flushes the upper filter screen, the middle filter screen and the lower filter screen in the reverse direction. Cleaner and rinses faster.

Specifically, one end of the water delivery pipe 52 is connected to the bottom of the water collecting pan 51, and the other end of the water delivery pipe 52 is connected to a water storage tank 67, the lower part of the water storage tank 67 is provided with a water outlet, and the water inlet pipe 64 is connected with the water outlet to realize circulation Back-flush the filter unit with the stripped white water. The water delivery pipe 52 discharges the stripped white water into the water storage tank 67 for storage. When the filter screen needs to be backwashed, the white water in the water storage tank 67 is pumped out to each spray pipe by the flushing pump 65, and the stripped white water is used as flushing water. , Recycle and reuse the stripped white water, no need to connect to the flushing water source, low carbon and environmental protection.

Specifically, the upper water spray pipe 61 , the middle water spray pipe 62 and the lower water spray pipe 63 are rotatably installed on the frame 1 , and three water spray pipes are provided on one side of the frame 1 for driving the upper water spray pipe 61 and the middle water spray pipe 62 The drive motor that rotates with the lower spray pipe 63, the three drive motors are respectively connected to the upper spray pipe 61, the middle spray pipe 62 and the lower spray pipe 63; the upper spray pipe 61, the middle spray pipe 62 and the lower spray pipe The water pipes 63 are respectively connected to the water inlet pipes 64 through three water spray connection pipes 68, and the water spray connection pipes 68 are made of hoses. Through the reciprocating rotation of the upper water spray pipe 61, the middle water spray pipe 62 and the lower water spray pipe 63, the flushing range is enlarged, the flushing range covers the entire filter screen, and the flushing water is gradually sprayed from the upper end of the filter screen to the lower end to avoid dead corners. Cleaning is more thorough.

Specifically, the slurry discharge pipe 41 is also connected with a sewage discharge pipe 45, the sewage discharge pipe 45 is provided with a sewage discharge valve 46, the slurry discharge pipe 41 is provided with a slurry discharge valve 47, and the slurry discharge valve 47 is located between the sewage discharge pipe 45 and the slurry storage tank 44. , when the blowdown valve 46 is closed, the slurry valve 47 is opened, and when the slurry valve 47 is closed, the blowdown valve 46 is opened. Since the washed wastewater will flow into the pulp collecting box 42, in order to prevent the wastewater from flowing into the pulp storage tank 44, close the pulp valve 47 and open the sewage valve 46 during flushing, so that the wastewater is discharged from the sewage pipe 45, and when concentrating, close the The sewage valve 46 is opened, and the slurry valve 47 is opened, so that the concentrated slurry enters the slurry tank 44 and is prevented from being discharged from the sewage pipe 45 .

Specifically, the sewage discharge pipe 45 is also provided with a sewage filter mechanism 48. The sewage filter mechanism 48 includes two connecting flanges and a sealing gasket. The two connecting flanges are flanged together, and the sealing gasket is clamped between the two connecting flanges. , a filter screen is arranged in the middle of the sealing gasket. Since the washed sewage contains impurities, the impurities are filtered through the filter screen in the sealing gasket before the waste water is discharged. When the filter screen in the sealing gasket needs to be cleaned, the two connecting flanges are disassembled, and the sealing gasket is removed for replacement or replacement. The filter is rinsed.

The working principle of the utility model is:

When concentrating, close the sewage valve 46, open the slurry valve 47, and the slurry supply pump 33 applies pressure to the slurry in the slurry supply pipe 32, so that the slurry fills the slurry spreading pipe 31. After the slurry fills the slurry spreading pipe 31, the slurry The material gradually and uniformly overflows from the slurry outlet of the slurry pipe 31 to the upper surface of the upper filter screen 21, and the slurry gradually flows along the upper filter screen 21 into the pulp collecting box 42 below the upper filter screen 21, while the moisture in the slurry and Medium-sized fibers and fine fibers flow into the upper surface of the middle filter screen 22 from the mesh holes of the upper filter screen 21, and the slurry on the upper surface of the middle filter screen 22 gradually flows along the middle filter screen 22 to the collection below the middle filter screen 22. In the pulp box 42, the moisture and fine fibers in the pulp flow into the upper surface of the lower filter screen 23 through the mesh holes of the middle filter screen 22, and the pulp on the upper surface of the lower filter screen 23 gradually flows down along the lower filter screen 23. In the pulp collecting box 42 below the filter screen 23, the moisture in the pulp flows into the water collecting tray 51 from the mesh holes of the lower filter screen 23, and enters the water storage tank 67 through the water delivery pipe 52 through the filter residue screen 53; The pulp in the box 42 enters the pulp storage tank 44 through each pulp box connecting pipe 43 through the pulp outlet pipe 41 .

When flushing, open the sewage valve 46, close the slurry valve 47, and pump out the white water in the water storage tank 67 to the water inlet pipe 64 through the flushing pump 65, and the white water in the water inlet pipe 64 enters the upper water spray pipe 61 and the middle water spray pipe respectively. 62 and the lower water spray pipe 63, and spray out from its respective nozzles 66, the driving motor drives the upper water spray pipe 61, the middle water spray pipe 62 and the lower water spray pipe 63 to rotate back and forth, and reversely flush the upper filter screen 21, the middle filter The screen 22 and the lower filter screen 23, the washed waste water flows into each pulp box 42, and the waste water passes through each pulp box connecting pipe 43 and enters the sewage pipe 45 through the pulp outlet pipe 41 to be discharged.

The above content is only a preferred embodiment of the present invention. For those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation and application scope, and the content of this description should not be construed as Limitations of the present invention.

Claims (10)

1. An improved multi-wire pulp thickener, comprising a frame (1), a filter device, a pulp supply device, a pulp collection device and a water collection device, the filter device is installed in the frame (1), and the pulp supply device is installed in the machine. On the upper end of the frame (1), the pulp collecting device and the water collecting device are respectively installed on the frame (1) below the filter device, and are characterized in that: The filter device comprises an upper filter screen (21), a middle filter screen (22) and a lower filter screen (23) which are connected end to end from top to bottom and are sequentially installed obliquely on the frame (1). The direction is opposite to the inclination direction of the upper filter screen (21), the inclination direction of the upper filter screen (21) is the same as the inclination direction of the lower filter screen (23), and the filtering accuracy of the upper filter screen (21) is smaller than that of the middle filter screen (22) The filtering precision of the middle filter screen (22) is smaller than that of the lower filter screen (23), The pulp feeding device is installed on the top of the frame (1), and the pulp feeding device is located on one side of the upper filter screen (21), The pulp collecting device is provided with at least three pulp collecting boxes (42), and the three pulp collecting boxes (42) are respectively installed under the upper filter screen (21), the middle filter screen (22) and the lower filter screen (23). The pulp collecting box (42) below the upper filter screen (21) and the pulp supply device are located on the same side of the upper filter screen (21), The water collecting device is provided with a water collecting tray (51) and a water delivery pipe (52). 52) Connect with the water collecting tray (51). 2. An improved multi-wire pulp thickener according to claim 1, characterized in that: the pulp feeding device comprises a pulp laying pipe (31), a pulp feeding pipe (32) and a pulp feeding pump (33), The pulping pipe (31) is arranged along the lateral direction of the upper filter screen (21), and the pulping pipe (31) and the pulp collecting box (42) installed below the upper filter screen (21) are located on the upper filter screen On the same side of (21), the side of the slurry pipe (31) facing the upper filter screen (21) is provided with a slurry outlet along the length of the slurry pipe (31), and the slurry supply pump (33) is installed in the supply The slurry pipe (32) and the slurry supply pipe (32) are connected with the slurry spreading pipe (31), so as to uniformly spread the slurry on the upper filter screen (21). 3. An improved multi-wire pulp thickener according to claim 1, characterized in that: the upper filter screen (21) and the lower filter screen (23) are arranged in parallel, and the middle filter screen (22) ) is connected to the lower end of the upper filter screen (21), the lower end of the middle filter screen (22) is connected to the upper end of the lower filter screen (23), and the clamping feet of the upper filter screen (21) and the middle filter screen (22) are 60° ~150°, the clip feet between the middle filter screen (22) and the lower filter screen (23) are the same as the clip feet between the middle filter screen (22) and the upper filter screen (21). 4. An improved multi-wire pulp thickener according to claim 1, wherein the pulp collecting device comprises a pulp outlet pipe (41), three pulp collecting boxes (42) and a plurality of pulp A box connecting pipe (43), three pulp collecting boxes (42) are respectively installed under the upper filter screen (21), the middle filter screen (22) and the lower filter screen (23), and the pulp outlet pipe (41) Vertically installed on one side of the frame (1), the bottom surface of the pulp collecting box (42) has a slope inclined toward the pulp outlet pipe (41), and one end of each pulp box connecting pipe (43) is connected to each The lowest position of the bottom surface of the pulp collecting box (42), the other end of each pulp box connecting pipe (43) is connected to the pulp outlet pipe (41), and the bottom of the pulp outlet pipe (41) is connected to a pulp storage tank (44). 5. An improved multi-wire pulp thickener according to claim 1, characterized in that: the water collecting tray (51) is in the shape of a funnel, and the water delivery pipe (52) is installed on the water collecting tray (51) At the bottom of the water collecting tray (51), a filter residue screen (53) is movably installed in the middle of the water collecting tray (51), so as to realize the filtration of the peeled white water. 6. An improved multi-wire pulp thickener according to any one of claims 1 to 5, characterized in that: the multi-wire thickener is further provided with a filter screen backwashing device, The screen backwashing device includes an upper water spray pipe (61), a middle water spray pipe (62), a lower water spray pipe (63), a water inlet pipe (64) and a flushing pump (65), and the upper water spray pipe (61) is provided with Between the upper filter screen and the middle filter screen, the middle water spray pipe (62) is arranged between the middle filter screen (22) and the lower filter screen (23), and the lower water spray pipe (63) is arranged at the bottom Below the filter screen (23) and on the same side of the frame (1) as the upper water spray pipe (61), The upper water spray pipe (61), the middle water spray pipe (62) and the lower water spray pipe (63) are respectively provided with a plurality of spray heads (66) at intervals along the length direction thereof, and the spray heads (66) of the upper water spray pipe (61) Facing the bottom surface of the upper filter screen (21), the nozzle (66) of the middle water spray pipe (62) is facing the bottom surface of the middle filter screen (22), and the nozzle (66) of the lower water spray pipe (63) is facing the lower filter screen (23) ) on the underside, The water inlet pipe (64) is installed on one side of the frame (1), and the water inlet pipe (64) is respectively connected with the upper water spray pipe (61), the middle water spray pipe (62) and the lower water spray pipe (63), The flushing pump (65) is installed on the water inlet pipe (64) to pressurize the water inlet pipe (64). 7. An improved multi-wire pulp thickener according to claim 6, characterized in that: one end of the water delivery pipe (52) is connected to the bottom of the water collecting tray (51), and the water delivery pipe (52) The other end is connected with a water storage tank (67), the lower part of the water storage tank (67) is provided with a water outlet, and the water inlet pipe (64) is connected with the water outlet, so as to realize the reverse flushing of the filter device using the stripped white water. . 8. An improved multi-wire pulp thickener according to claim 7, characterized in that: the upper water spray pipe (61), the middle water spray pipe (62) and the lower water spray pipe ( 63) It is rotatably mounted on the frame (1), and one side of the frame (1) is provided with three water spray pipes (61), middle water spray pipes (62) and lower water spray pipes (63) for driving a rotating drive motor, the three drive motors are respectively connected to the upper water spray pipe (61), the middle water spray pipe (62) and the lower water spray pipe (63); The upper water spray pipe (61), the middle water spray pipe (62) and the lower water spray pipe (63) are respectively connected to the water inlet pipe (64) through three water spray connection pipes (68), and the water spray connection pipes (68) are respectively connected to the water inlet pipe (64). ) using a hose. 9. An improved multi-wire pulp thickener according to claim 4, characterized in that: the pulp outlet pipe (41) is also connected with a sewage pipe (45), and the sewage pipe (45) is provided with a sewage valve (46), the slurry outlet pipe (41) is provided with a slurry outlet valve (47), and the slurry outlet valve (47) is located between the sewage pipe (45) and the slurry storage tank (44), when the sewage valve (46) is closed When the slurry valve (47) is opened, the sewage valve (46) is opened when the slurry valve (47) is closed. 10 . The improved multi-wire pulp thickener according to claim 9 , wherein the sewage pipe ( 45 ) is further provided with a sewage filter mechanism ( 48 ), and the sewage filter mechanism ( 48 ) comprises two The connecting flange and the sealing washer are connected by flanges, the sealing washer is clamped between the two connecting flanges, and a filter screen is arranged in the middle of the sealing washer.

Images