CN115231796B - Sludge dewatering machine - Google Patents

Abstract

The invention relates to a sludge dewatering machine, which comprises a frame, a feeder connected to the upper end of the frame, an upper filter belt, a lower filter belt and a squeezing mechanism, wherein the upper filter belt, the lower filter belt and the squeezing mechanism are connected to the frame, the lower filter belt is arranged below the feeder, the upper filter belt and the lower filter belt are wound around the squeezing mechanism, the motion in the squeezing mechanism is in the same direction, the squeezing mechanism comprises vacuum squeezing rollers and squeezing rollers which are alternately arranged, the vacuum squeezing rollers comprise first vacuum squeezing rollers, and the first vacuum squeezing rollers and the squeezing rollers are both connected to the frame in a sliding manner and can reciprocate along the frame in the horizontal direction. The sludge dewatering machine provided by the invention not only can effectively utilize space and occupy small area, but also can realize that the solid-liquid separation of the sludge is quicker and more thorough under the actions of multiple means such as squeezing shearing, vacuum adsorption, linear extrusion and the like, and the product has lower water content.

Description

Sludge dewatering machine

Technical Field

The invention relates to the technical field of solid-liquid separation, in particular to a sludge dewatering machine.

Background

Conventional sludge dewatering machines are generally divided into a gravity dewatering zone and a pressing zone. Firstly, arranging materials on a filter belt a by a feeding device, dehydrating the materials under the action of gravity along with the operation of the filter belt a to form thick slurry, then winding the materials carried by the filter belt a and the filter belt b together to pass through a multistage press roller for press dehydration, and finally discharging the materials at a discharging end (see figure 1). The device has a gravity dewatering area with enough length to ensure good squeezing effect in the squeezing area, so the volume of the device is generally larger, in addition, the dewatering means in the squeezing area is single, the dewatering is performed completely by the shearing force formed by the tensioned filter belt on the squeezing roller, the squeezing force is low, and the dewatering effect is not ideal.

In the Chinese patent literature, the publication No. CN 203971536U discloses a filtering scheme (see figure 2), the equipment consists of a vacuum area and a pressing area, slurry is dehydrated in the vacuum area to form a filter cake, then the filter cake is carried by the filter belt to enter the pressing area, the filter cake is wound through a plurality of stages of pressing rollers to be pressed and dehydrated, and finally materials are discharged at a discharging end. Because of the addition of an independent vacuum area, the equipment has large occupied area and long length, and the problems of single squeezing means and low squeezing force exist.

In Chinese patent literature, the utility model is named as a vacuum filter with a filter pressing function, the publication No. CN 203678133U discloses a filtering scheme (see figure 3), a vacuum area and a squeezing area of the equipment are combined together, materials are wrapped by two filter fabrics to surround the vacuum drum with vacuum after being dehydrated by gravity, and vacuum filtration dehydration is carried out at the same time of squeezing dehydration. Because the equipment is only provided with a group of squeezing vacuum dehydration, the volume of the vacuum drum is quite large, and the generated squeezing force is quite low, so that the dehydration capacity is quite low, the energy consumption is high, the dehydration effect is not ideal, and some occasions with high requirements cannot be met.

Disclosure of Invention

The invention aims to provide a sludge dewatering machine which is small in equipment size and can enable solid-liquid separation of sludge to be quicker and more thorough through the actions of multiple means such as squeezing shearing, vacuum adsorption, linear extrusion and the like.

In order to achieve the above purpose, the present invention provides the following technical solutions: the utility model provides a sludge dewatering machine, includes the frame and connects in the charging means of frame upper end, its characterized in that still includes to connect in the upper filter belt of frame, lower filter belt and squeezes the mechanism, lower filter belt sets up in the below of charging means, upper filter belt and lower filter belt all twine through squeezing the mechanism to the motion in squeezing the mechanism is equidirectional, squeezing the mechanism and including the vacuum squeeze roller and the squeeze roller that set up in turn, the vacuum squeeze roller includes first vacuum squeeze roller, first vacuum squeeze roller and squeeze roller equal sliding connection in the frame can follow the reciprocating motion of frame on the horizontal direction. According to the scheme, the first vacuum squeezing roller and the squeezing roller capable of reciprocating are arranged on the basis of the vacuum squeezing mechanism, and the squeezing force is applied to enable the first vacuum squeezing roller and the squeezing roller to generate high-strength linear squeezing, so that the dewatering effect is effectively improved on the basis of effectively utilizing space.

As the preferable scheme, the vacuum press roll further comprises a second vacuum press roll arranged above the press roll, the first vacuum press roll and the second vacuum press roll have the same structure, the upper filter belt and the lower filter belt are wound through the second vacuum press roll, and S-shaped winding distribution is formed between the press roll and the first vacuum press roll.

As a preferable scheme, a plurality of vacuum pipelines are circumferentially arranged in the first vacuum squeezing roller, the outer surface of the first vacuum squeezing roller is provided with vacuum liquid suction ports and liquid collecting grooves corresponding to the number of the vacuum liquid, the vacuum pipelines are communicated to the vacuum liquid suction ports, and a vacuum suction filtration area is formed on the outer surface of the first vacuum squeezing roller through the liquid collecting grooves.

As a preferable scheme, the squeezing mechanism further comprises an air guide disc assembly, and the air guide disc assembly is connected to a bearing seat at the axial side end of the vacuum squeezing roller and used for enabling the area covered by the upper filter belt and the lower filter belt in the vacuum squeezing roller to be communicated with a vacuum pumping device.

As the preferred scheme, the air guide plate assembly comprises an air guide plate body, the air guide plate body is connected with vacuumizing equipment, the air guide plate body covers the outlet end of the vacuum pipeline, a first arc-shaped opening is formed in the air guide plate body and is matched with the arc shape of the vacuum pipeline arranged in the circumferential direction, and the air guide plate assembly is used for enabling a liquid collecting groove covered by the upper filter belt and the lower filter belt to be communicated with the vacuumizing equipment.

As the preferred scheme, the air guide plate assembly still includes mount pad and coupling, the mount pad is connected to the bearing frame, air guide plate body coupling is between mount pad and coupling, and the contact surface of coupling and air guide plate body is provided with the second arc mouth that first arc mouth matches, the mount pad circumference is equipped with a plurality of mounting grooves that are the arc, the coupling is installed in the mounting groove.

As a preferable scheme, the sludge dewatering machine further comprises a pressing mechanism, the pressing mechanism comprises a pressing belt and a pressing roller arranged above the pressing belt, the pressing belt passes through the second vacuum pressing roller, is in S-shaped winding distribution between the pressing roller and the first vacuum pressing roller together with the upper filter belt and the lower filter belt, the pressing roller can reciprocate in a direction approaching or far away from the pressing belt, and when the pressing roller moves in a direction approaching to the pressing belt, the pressing roller is abutted to the pressing belt. The pressurizing belt is a high-strength belt with flexible two ends which are butted to form an annular steel belt or other materials, and the pressurizing belt applies high-strength pretightening force to the pressurizing belt through the pressurizing roller, so that the pressurizing belt generates high-strength squeezing force to the upper filter belt, and the squeezing clamping force between the upper filter belt and the lower filter belt is enhanced.

Preferably, the pressurizing mechanism further comprises a pressurizing roller, the pressurizing roller is arranged above the first vacuum squeezing roller, the pressurizing belt is wound around the pressurizing roller after passing through the vacuum squeezing roller and the squeezing roller, the pressurizing roller reciprocates in a direction close to or far away from the first vacuum squeezing roller, and when the pressurizing roller moves in a direction close to the first vacuum squeezing roller, the pressurizing roller is abutted to the first vacuum squeezing roller. The pressing roller applies linear extrusion with higher strength to the dehydration interlayer on the first vacuum pressing roller, so that the pressed liquid is rapidly separated, and the dehydration effect is further improved.

As the preferred scheme, sludge dewaterer still includes guiding mechanism, guiding mechanism sets up to two sets, is used for adjusting the rate of tension of upper filter belt, lower filter belt respectively, guiding mechanism includes sliding connection to the regulating roller of frame, and two regulating rollers butt respectively to upper filter belt and lower filter belt, and guiding mechanism still can make this sludge dewaterer adapt to the filter belt of different length.

Preferably, the feeder is a double screw feeder, which can form a more uniform laying of the material to be dewatered.

Compared with the prior art, the invention has the beneficial effects that: the sludge dewatering machine provided by the invention reasonably improves and utilizes the structure of the pressing mechanism, and by arranging the pressing mechanism in the pressing mechanism and arranging the pressing roller capable of reciprocating in the vertical direction and the first vacuum pressing roller and the pressing roller capable of reciprocating in the horizontal direction, the linear extrusion is carried out among roller bodies, so that the space can be effectively utilized, the occupied area is small, meanwhile, the machine has high-strength pressing capacity, high-strength pressing capacity and vacuum filtration function, and the solid-liquid separation of sludge is quicker and more thorough under the actions of multiple means of pressing shearing, vacuum adsorption and high-strength pressing force of a pressing belt and linear extrusion, and the product has lower water content. Meanwhile, the invention aims at the air guide disc assembly arranged on the vacuum squeezing roller, so that the suction filtration and liquid collection effect of the vacuum equipment is better.

Drawings

Fig. 1 is a schematic view of a conventional belt filter press;

FIG. 2 is a schematic view of a conventional compact vacuum belt filter press;

FIG. 3 is a schematic diagram of a conventional vacuum filter with filter pressing function;

FIG. 4 is a schematic diagram of the overall structure of the sludge dewatering machine according to the present invention;

FIG. 5 is a front view of the sludge dewatering machine according to the present invention;

FIG. 6 is a simplified schematic diagram of a sludge dewatering machine according to the present invention;

FIG. 7 is a schematic view of a vacuum press roll and air guide plate assembly according to the present invention;

FIG. 8 is an exploded view of the vacuum squeeze roll and air guide plate assembly of the present invention;

FIG. 9 is a schematic view of a vacuum squeeze roll according to the present invention;

Fig. 10 is a schematic structural view of a pipe joint according to the present invention.

The meaning of each reference sign in the figure is:

1. A frame; 2. a feeder; 3. a lower filter belt; 4. a second vacuum press roll; 41. a vacuum pipe; 42. a vacuum liquid suction port; 43. a liquid collecting groove; 5. a pressurizing roller; 6. a pressing roller; 7. a pressurizing oil cylinder; 81. cleaning the spray pipe; 82. cleaning a water receiving disc; 91. an upper driving roller; 92. a lower driving roller; 10. a filter belt is arranged; 11. a pressurizing belt; 12. a scraper; 13. an air guide disc assembly; 14. a first vacuum press roll; 15. a press roll; 16. a correction roller; 17. squeezing a water receiving disc; 18. a redirecting roller; 19. a tension roller; 201. An adjusting roller; 202. adjusting a screw rod; 131. an air guide disc body; 132. a mounting base; 133. a pipe joint; 134. a first arcuate port; 135. a second arcuate port; 136. and a mounting groove.

Detailed Description

The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.

Referring to fig. 4-6, this embodiment discloses a sludge dewatering machine, which comprises a frame 1, the frame 1 plays the role of supporting and auxiliary connection to the whole sludge dewatering machine, an upper filter belt 10, a lower filter belt 3, a squeezing mechanism and a pressurizing mechanism are respectively connected on the frame 1, a certain height difference exists on the left side and the right side of the frame 1, the upper filter belt 3 and the lower filter belt 3 are convenient to match, in this embodiment, the frame 1 is in a left-low right high shape, the upper filter belt 10 is arranged on the right upper side of the frame 1, the upper filter belt 3 is tensioned into a closed loop through a roller assembly and the squeezing mechanism, the lower filter belt 3 is arranged on the left lower side of the frame 1, the lower filter belt 3 is tensioned into a closed loop through a roller assembly and the squeezing mechanism, the whole movement directions of the upper filter belt 10 and the lower filter belt 3 are opposite, and the upper filter belt 3 move along part of the squeezing mechanism in the same direction. An upper driving roller 91 and a lower driving roller 92 which are oppositely arranged are connected to the right side end of the frame 1, the upper filter belt 10 and the lower filter belt 3 are respectively wound through the upper driving roller 91 and the lower driving roller 92, the upper driving roller 91 and the lower driving roller 92 are respectively used for providing driving force for the upper filter belt 10 and the lower filter belt 3, the lower driving roller 92 is connected with a driving motor, and the lower driving roller 92 and the upper driving roller 91 are in meshed connection. The upper end of the frame 1 is connected with a feeder 2, a lower filter belt 3 is arranged below the feeder 2, a material to be dehydrated is fed to the upper surface of the lower filter belt 3 through the feeder 2 and is driven to move by the lower filter belt 3, the material to be dehydrated is wrapped by the upper filter belt 10 and the lower filter belt 3 through the junction with the upper filter belt 10 and enters a squeezing mechanism jointly for dehydration, and then the material to be dehydrated is discharged from the upper driving roller 91 and the lower driving roller 92. In this embodiment, the feeder 2 is preferably a twin screw feeder, which results in a more even laying of the material to be dewatered.

The press mechanism comprises alternately arranged vacuum press rolls and press rolls 15, the upper filter belt 10 and the lower filter belt 3 wrap filter cakes and sequentially wind the press rolls 15 and the vacuum press rolls to form S-shaped zigzag forward, the vacuum press rolls further comprise a first vacuum press roll 14 and a second vacuum press roll 4 for improving the press filtration effect, the first vacuum press roll 14 and the press rolls 15 are all arranged into a plurality of groups and horizontally arranged along the frame 1, and the second vacuum press roll 4 is arranged into a group and is arranged above the press rolls 15. One end of the lower filter belt 3 is wound around the second vacuum squeeze roller 4 forwards through the lower direction of the double-screw feeder, then sequentially wound around the squeeze roller 15 and the first vacuum squeeze roller 14, finally wound around the lower driving roller 92 and passed through the scraper 12 at the lower end of the side of the lower driving roller 92, and connected with the other end of the lower filter belt to form a closed loop; one end of the upper filter belt 10 is changed to be wound together with the lower filter belt 3 through the second vacuum press roll 4 by the direction-changing roll 18, is wound sequentially through the press roll 15 and the first vacuum press roll 14, finally bypasses the upper driving roll 91 and passes through the scraper 12 at the upper end of the upper driving roll 91 side, and is connected with the other end to form a closed loop.

The second vacuum press roll 4 has the same structure as the first vacuum press roll 14, and the structure of the second vacuum press roll 4 is described by taking the second vacuum press roll 4 as an example, referring to fig. 7 and 9, the second vacuum press roll 4 comprises a plurality of vacuum pipelines 41 circumferentially arranged inside, and liquid collecting grooves 43 which are arranged on the outer surface of the second vacuum press roll and are communicated with the vacuum liquid suction ports 42 corresponding to the vacuum pipelines 41 in number, one end of each vacuum pipeline 41 is communicated with the shaft end of the second vacuum press roll 4 and is externally connected with a vacuumizing device, the other end of each vacuum pipeline 41 is communicated with the vacuum liquid suction port 42, and a vacuum filtering area is formed on the outer surface of the second vacuum press roll 4 through the liquid collecting grooves 43. The upper filter belt 10 and the lower filter belt 3 wrap the filter cake, run to the squeezing mechanism and are wound and pass through, the material is dehydrated under the dual actions of squeezing shearing force and vacuum pumping force, the dehydrated material forms a compact filter cake, and meanwhile, the separated filtrate can be rapidly pumped away under the action of vacuum, so that the rise of water content of the filter cake caused by the fact that the filtrate contacts the filter cake again is avoided. Further, at least two press rolls 15 are arranged, the press rolls 15 and the first vacuum press rolls 14 are alternately arranged, so that the upper filter belt 10 and the lower filter belt 3 wrap filter cakes and sequentially wrap the press rolls 15 and the first vacuum press rolls 14, the filter cakes are in S-shaped zigzag advancing, when the filter cakes wrap the press rolls 15, the filter cakes are positioned on the lower surfaces of the press rolls 15, and the press liquid is collected by a press water receiving disc 17 connected below a press mechanism, so that the press liquid is prevented from contacting the filter cakes again; when the filter cake passes through the first vacuum squeezing roller 14, the filter cake is positioned on the upper surface of the first vacuum squeezing roller 14, and the filtered liquid is pumped down to avoid the influence of the accumulated liquid of the vacuum pipeline 41 on the water content of the filter cake. referring to fig. 8 and 10, in a preferred embodiment, the pressing mechanism further includes an air guide disc assembly 13, where the air guide disc assembly 13 is connected to an axial side end of the vacuum press roll and is used for communicating with a vacuum pumping device, and the air guide disc assembly 13 is used for ensuring that an area covered by the upper and lower filter belts 3 in the vacuum press roll is communicated with vacuum, and an uncovered area is not communicated with vacuum. The air guide plate component 13 comprises an air guide plate body 131, a mounting seat 132 and a pipe joint 133, wherein the pipe joint 133 and the mounting seat 132 are fastened and connected by bolts, the air guide plate body 131 is connected between the mounting seat 132 and the pipe joint 133, the mounting seat 132 is fixedly connected onto a bearing seat at the axial side end of a vacuum squeezing roller, the outlet end of a vacuum pipeline 41 of the vacuum squeezing roller penetrates through the mounting seat 132, the air guide plate body 131 is arranged into a disc shape, adopts ceramic wear-resistant materials, is subjected to end surface mirror surface treatment, covers the outlet end of the vacuum pipeline 41, is provided with a first arc-shaped opening 134, the first arc-shaped opening 134 is arc-matched with the circumferentially arranged vacuum pipe 41, and the outlet end of the partial vacuum pipe 41 is communicated with a vacuum pumping device through the first arc-shaped opening 134, namely, the region of the liquid collecting groove 43 covered by the upper filter belt 3 and the lower filter belt 3 is communicated with the vacuum pumping device. The position of the outlet end of the vacuum pipeline 41, namely the end port of the shaft end of the vacuum squeeze roller, is fixedly connected with a switching disc, a plurality of through holes matched with the outlet end of the vacuum pipeline 41 are circumferentially arranged on the switching disc, the air guide disc body 131 is abutted against the switching disc, the switching disc rotates along with the vacuum squeeze roller, the switching disc is made of ceramic wear-resistant materials, and the end face is subjected to mirror surface treatment, so that the friction force between the air guide disc body 131 and the switching disc can be reduced. To enhance the vacuum adsorption and liquid collection effect, in another embodiment, the pipe joint 133 is provided with a second arc-shaped opening 135 matched with the first arc-shaped opening 134, so that the vacuum adsorption effect is more concentrated; further, the mounting base 132 is provided with a plurality of arc-shaped mounting grooves 136 in the circumferential direction thereof, the pipe joint 133 is mounted in the mounting grooves 136, and the angle of the pipe joint 133 can be finely adjusted through the arc-shaped mounting grooves 136, so that the first arc-shaped opening 134 and the second arc-shaped opening 135 can be accurately aligned.

The pressing mechanism further comprises a pressing belt 11 and a pressing roller 6 arranged above the pressing belt 11, wherein the pressing belt 11 is a high-strength belt with flexible two ends butted to form a ring-shaped steel belt or other materials, the pressing belt 11 passes through the second vacuum press roller 4, is wound in an S shape together with the upper filter belt 10 and the lower filter belt 3 between the press roller 15 and the first vacuum press roller 14, passes through the lower part of the pressing roller 6 and is connected with the other end of the pressing roller to form a closed loop. The upper filter belt 10, the lower filter belt 3, the second vacuum press roll 4, the press roll 15 and the first vacuum press roll 14 form a dehydration interlayer at the overlapping part, and the upper filter belt 10, the lower filter belt 3 and the pressurizing belt 11 run synchronously and move in the same direction in the dehydration interlayer. The axial both ends of impression roller 6 pass through bearing frame sliding connection in frame 1, bearing frame and frame 1 are equipped with matched spout and guide rail respectively in corresponding position, and then, impression roller 6 can reciprocate in vertical direction, can be to being close to or keep away from the direction reciprocating motion of press belt 11, when moving to the direction that is close to press belt 11, impression roller 6 butt to press belt 11, exert high-strength pretightning force to press belt 11 through impression roller 6, make press belt 11 produce high-strength squeezing force to last filter belt 10, the extrusion clamping force between reinforcing upper filter belt 10 and the lower filter belt 3. Further, two pressing cylinders 7 are connected to the upper end of the frame 1, piston rod ends of the two pressing cylinders 7 are respectively connected to the two bearing seats, and the pressing cylinders 7 control the pressing rollers 6 to reciprocate. The upper filter belt 10 and the lower filter belt 3 are used for wrapping materials, the pressurizing belt 11 is attached to the second vacuum press roller 4 and is wound and passed, the materials are dehydrated under the triple actions of pressing shearing force, pressing force and vacuum pumping force at the first vacuum press roller 14 and the press roller 15, the dehydrated materials form a compact filter cake, and meanwhile, the separated filtrate can be rapidly pumped away under the action of vacuum. Further, both axial ends of the first vacuum press roll 14 and the press roll 15 are slidably connected to the frame 1, and can reciprocate in the horizontal direction along the frame 1, both axial ends of the first vacuum press roll 14 and the press roll 15 are respectively connected to the frame 1 through bearing seats, the bearing seats and the frame 1 are respectively provided with matched sliding grooves and guide rails at corresponding positions, the press belt 11 can be tightened by applying downward pressure to the press belt 11 through the press roll 6, so that the first vacuum press roll 14 and the press roll 15 are moved and pressed together, and linear extrusion is applied to a dehydration interlayer between the first vacuum press roll 14 and the press roll 15.

In one embodiment, the pressing mechanism further comprises pressing rollers 5 arranged above the first vacuum pressing rollers 14, the number of the pressing rollers 5 is the same as that of the first vacuum pressing rollers 14, one end of the pressing belt 11 is wound through the second vacuum pressing rollers 4, then is distributed in an S-shaped winding mode between the pressing rollers 15 and the first vacuum pressing rollers 14 together with the upper filter belt 10 and the lower filter belt 3, and then is wound through the pressing rollers 5, passes below the pressing rollers 6 and is connected with the other end of the pressing belt to form a closed loop. In this embodiment, the pressing roller 5 not only plays a role of tensioning the pressing belt 11, but also can reciprocate along the vertical direction of the frame 1, that is, reciprocate in the direction close to or far from the first vacuum pressing roller 14, and the connection mode between the pressing roller 5 and the frame 1 is the same as the pressing roller 6, which is not described herein. When the pressurizing roller 5 moves in a direction approaching the first vacuum squeezing roller 14, the pressurizing roller 5 is abutted to the first vacuum squeezing roller 14, the pressurizing belt 11 drives the pressurizing roller 5 to rotate, the pressurizing roller 5 can be pressed on the first vacuum squeezing roller 14 by applying downward pressure to the pressurizing belt 11 through the pressurizing roller 6, and linear extrusion is applied to a dehydration interlayer between the pressurizing roller 5 and the first vacuum squeezing roller 14. The number of the pressing rollers 5 and the first vacuum pressing rollers 14 can be specifically set according to the process requirements and the material characteristics, and in other embodiments, the number of the pressing rollers 5 can be smaller than the number of the first vacuum pressing rollers 14. The upper filter belt 3 and the lower filter belt 3 are wrapped by the pressurizing belt 11 and are wound together to pass through the second vacuum squeezing roller 4, the pressurizing oil cylinder 7 enables the pressurizing belt 11 to generate extremely high pretightening force through the pressurizing roller 6, the pressurizing belt 11 with pretightening force generates high-strength extrusion force on the first vacuum squeezing roller 14, the pressurizing roller 5 applies linear extrusion with higher strength on the dehydration interlayer on the first vacuum squeezing roller 14 and linear extrusion between the first vacuum squeezing roller 14 and the squeezing roller 15, and meanwhile vacuum auxiliary suction filtration enables the squeezing liquid to be rapidly separated, so that the optimal dehydration effect of a product can be ensured.

In one embodiment, the sludge dewatering machine provided by the invention further comprises two sets of adjusting mechanisms, wherein the two sets of adjusting mechanisms are respectively connected to the positions, close to the upper end and the middle end, of the frame 1 and are used for adjusting the tension of the upper filter belt 10 and the lower filter belt 3, and the sludge dewatering machine can also adapt to filter belts with different lengths. The two adjusting mechanisms have the same structure, and the middle-end adjusting mechanism is taken as an example for description, the adjusting mechanism comprises an adjusting screw rod 202 and an adjusting roller 201, the two axial ends of the adjusting roller 201 are connected to the frame 1 through an adjusting seat in a sliding manner, the adjusting roller 201 can reciprocate along the horizontal direction of the frame 1, the adjusting roller 201 is abutted to the lower filter belt 3, the tensioning degree of the lower filter belt 3 is adjusted through the reciprocating movement in the horizontal direction, the nut end of the adjusting screw rod 202 is fixedly connected to the frame 1, one end of the adjusting screw rod 202 is fixedly connected to the adjusting seat, the other end of the adjusting screw rod 202 is in threaded connection with the edge of the frame 1, and the moving distance of the adjusting roller 201 in the horizontal direction can be driven by rotating the adjusting screw rod 202.

Further, in the sludge dewatering machine provided by the invention, the roller body component comprises a tensioning roller 19 which is arranged at the side end of the adjusting roller 201 and is used for tensioning the upper and lower filter belts 3, a deviation correcting roller 16 which is arranged at the side end of the upper and lower filter belts 3 and is used for correcting the deviation of the upper and lower filter belts 3, and a redirecting roller 18 which is used for adjusting the directions of the upper and lower filter belts 3, wherein the arrangement of the roller body component is the prior art, and the details are omitted herein; still further, the sludge dewatering machine provided by the invention further comprises a cleaning spray pipe 81 arranged at the rear end of the scraper 12 and a cleaning water receiving disc 82 arranged below the cleaning spray pipe 81, wherein the cleaning spray pipe 81 and the cleaning water receiving disc 82 are connected to the frame 1 and are respectively used for cleaning and regenerating the upper filter belt 10 and the lower filter belt 3 and collecting and discharging cleaning water.

The sludge dewatering machine provided by the invention is characterized in that an upper filter belt 3 and a lower filter belt 3 are respectively driven to synchronously run by a driving motor, a double-screw feeder is used for arranging materials to be dewatered on the lower filter belt 3 at the feeding end of the device, the materials are gradually wrapped by the upper filter belt 3 and the lower filter belt 3 and wound through a second vacuum squeezing roller 4 along with the running of the lower filter belt 3, under the combined action of shearing force and vacuum, the materials are squeezed to form filter cakes, squeezed liquid is rapidly pumped away, then the upper filter belt 3 and the lower filter belt 3 carry the filter cakes together with a pressurizing belt 11 and are sequentially wound through a plurality of alternately arranged squeezing rollers 15 and a first vacuum squeezing roller 14, the materials are sequentially subjected to high-strength squeezing, vacuum dewatering and linear squeezing and vacuum dewatering, moisture in the filter cakes is removed to the maximum extent, after the optimal dewatering effect is achieved, the upper filter belt 3 and the lower filter belt 3 are separated from the pressurizing belt 11 and respectively bypass an upper driving roller 91 and a lower driving roller 92, the filter cakes are removed under the combined action of a scraper 12, the filter cakes are cleaned and regenerated at a cleaning nozzle 81, and sequentially pass through a roller assembly and an adjusting roller 201, and then the next dewatering cycle is carried out.

It can be understood that the sludge dewatering machine provided by the invention is not only suitable for sludge dewatering, but also suitable for other fields such as environmental protection, chemical industry, metallurgy, brewing, ceramics and the like.

The foregoing has shown and described the basic principles, principal features and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above-described embodiments, and that the above-described embodiments and descriptions are only preferred embodiments of the present invention, and are not intended to limit the invention, and that various changes and modifications may be made therein without departing from the spirit and scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (8)

1. The sludge dewatering machine comprises a frame (1) and a feeder (2) connected to the upper end of the frame (1), and is characterized in that,

The device comprises a frame (1), and is characterized by further comprising an upper filter belt (10), a lower filter belt (3) and a squeezing mechanism which are connected to the frame (1), wherein the lower filter belt (3) is arranged below the feeder (2), the upper filter belt (10) and the lower filter belt (3) are wound around the squeezing mechanism and move in the same direction along part of the squeezing mechanism, the squeezing mechanism comprises vacuum squeezing rollers and squeezing rollers (15) which are alternately arranged, the vacuum squeezing rollers comprise first vacuum squeezing rollers (14), and the first vacuum squeezing rollers (14) and the squeezing rollers (15) are both connected to the frame (1) in a sliding manner and can reciprocate in the horizontal direction along the frame (1);

The vacuum squeezing rollers further comprise a second vacuum squeezing roller (4) arranged above the squeezing roller (15), the first vacuum squeezing roller (14) and the second vacuum squeezing roller (4) are identical in structure, the upper filter belt (10) and the lower filter belt (3) are wound through the second vacuum squeezing roller (4), and S-shaped winding distribution is formed between the squeezing roller (15) and the first vacuum squeezing roller (14);

The first vacuum press rolls (14) and the press rolls (15) are arranged into a plurality of groups, the first vacuum press rolls (14) and the press rolls (15) are horizontally arranged along the frame (1), the upper filter belt (10) and the lower filter belt (3) are wound together to pass through the second vacuum press rolls (4), and sequentially wound to pass through the press rolls (15) and the first vacuum press rolls (14), when the press rolls (15) are wound, a filter cake is positioned on the lower surface of the press rolls (15), and when the first vacuum press rolls (14) are wound, the filter cake is positioned on the upper surface of the first vacuum press rolls (14);

The sludge dewatering machine further comprises a pressurizing mechanism, the pressurizing mechanism comprises a pressurizing belt (11) and a pressurizing roller (6) arranged above the pressurizing belt (11), the pressurizing belt (11) passes through the second vacuum squeezing roller (4), is in S-shaped winding distribution between the squeezing roller (15) and the first vacuum squeezing roller (14) together with the upper filtering belt (10) and the lower filtering belt (3), and the pressurizing roller (6) can reciprocate towards a direction close to or far away from the pressurizing belt (11), and is abutted to the pressurizing belt (11) when moving towards a direction close to the pressurizing belt (11).

2. The sludge dewatering machine according to claim 1, wherein,

The vacuum squeezing device is characterized in that a plurality of vacuum pipelines (41) are circumferentially arranged inside the first vacuum squeezing roller (14), vacuum liquid suction ports (42) and liquid collecting grooves (43) corresponding to the vacuum pipelines (41) in number are formed in the outer surface of the first vacuum squeezing roller (14), the vacuum pipelines (41) are communicated to the vacuum liquid suction ports (42), and a vacuum suction filtration area is formed on the outer surface of the first vacuum squeezing roller (14) through the liquid collecting grooves (43).

3. The sludge dewatering machine according to claim 2, wherein,

The squeezing mechanism further comprises an air guide disc assembly (13), and the air guide disc assembly (13) is connected to a bearing seat at the axial side end of the vacuum squeezing roller and used for enabling the area covered by the upper filter belt (10) and the lower filter belt (3) in the vacuum squeezing roller to be communicated with a vacuumizing device.

4. The sludge dewatering machine according to claim 3, wherein,

The air guide plate assembly (13) comprises an air guide plate body (131), the air guide plate body (131) covers the outlet end of the vacuum pipeline (41), a first arc-shaped opening (134) is formed in the air guide plate body (131), the first arc-shaped opening (134) is in arc-shaped matching with the circumferentially arranged vacuum pipeline (41) and is used for enabling a liquid collecting groove (43) covered by the upper filter belt (10) and the lower filter belt (3) to be communicated with a vacuumizing device.

5. The sludge dewatering machine according to claim 4, wherein,

The air guide disc assembly (13) further comprises a mounting seat (132) and a pipe joint (133), the mounting seat (132) is connected to the bearing seat, the air guide disc body (131) is connected between the mounting seat (132) and the pipe joint (133), the contact surface of the pipe joint (133) and the air guide disc body (131) is provided with a second arc-shaped opening (135) matched with the first arc-shaped opening (134), a plurality of arc-shaped mounting grooves (136) are circumferentially arranged on the mounting seat (132), and the pipe joint (133) is mounted in the mounting grooves (136).

6. The sludge dewatering machine according to claim 1, wherein,

The pressurizing mechanism further comprises a pressurizing roller (5), the pressurizing roller (5) is arranged above the first vacuum squeezing roller (14), the pressurizing belt (11) is wound around the pressurizing roller (5) after passing through the vacuum squeezing roller and the squeezing roller (15), the pressurizing roller (5) reciprocates in a direction close to or far away from the first vacuum squeezing roller (14), and when the pressurizing roller (5) moves in a direction close to the first vacuum squeezing roller (14), the pressurizing roller (5) is abutted to the first vacuum squeezing roller (14).

7. The sludge dewatering machine according to claim 1, wherein,

The sludge dewatering machine further comprises two adjusting mechanisms, wherein the two adjusting mechanisms are respectively used for adjusting the tension of the upper filter belt (10) and the lower filter belt (3), each adjusting mechanism comprises an adjusting roller (201) which is connected to the frame (1) in a sliding mode, and the two adjusting rollers (201) are respectively abutted to the upper filter belt (10) and the lower filter belt (3).

8. The sludge dewatering machine according to claim 1, wherein,

The feeder (2) is a double screw feeder.