CN115231796A

CN115231796A - Sludge dewatering machine

Info

Publication number: CN115231796A
Application number: CN202211068384.1A
Authority: CN
Inventors: 龚景仁; 王英帆; 卢伟; 高芬; 周铁辉
Original assignee: Qingdao Hesheng Intelligent Environmental Protection Equipment Co ltd
Current assignee: Qingdao Hesheng Intelligent Environmental Protection Equipment Co ltd
Priority date: 2022-09-02
Filing date: 2022-09-02
Publication date: 2022-10-25

Abstract

The invention relates to a sludge dewatering machine which comprises a rack, a feeder connected to the upper end of the rack, 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 rack, the lower filter belt is arranged below the feeder, the upper filter belt and the lower filter belt are wound around the squeezing mechanism and move in the same direction in the squeezing mechanism, the squeezing mechanism comprises a vacuum squeezing roller and a squeezing roller which are alternately arranged, the vacuum squeezing roller comprises a first vacuum squeezing roller, and the first vacuum squeezing roller and the squeezing roller are both connected to the rack in a sliding mode and can reciprocate in the horizontal direction along the rack. The sludge dewatering machine provided by the invention can effectively utilize space, has small occupied area, and can realize more rapid and thorough solid-liquid separation of sludge 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

A traditional sludge dewatering machine is generally divided into a gravity dewatering area and a squeezing area. The method comprises the following steps of firstly arranging materials on a filter belt a by a feeding device, dehydrating the materials to form thick slurry under the action of gravity along with the operation of the filter belt a, then winding the materials together by the filter belt a and the filter belt b through a multi-stage press roll for press dehydration, and finally discharging the materials at a discharging end (see figure 1). This equipment will have the gravity dehydration district of sufficient length, just can guarantee to have better squeezing effect in the district that squeezes, and consequently the volume of equipment is generally bigger, and in addition, squeeze district's dehydration means is single, relies on the shearing force that the tensioning filter belt formed on squeezing the roller completely to dewater, squeezes the dynamics low, and dewatering effect is unsatisfactory.

In the chinese patent literature, the utility model entitled "compact vacuum belt filter press", publication No. CN 203971536U discloses a filtration scheme (see fig. 2), the apparatus is composed of a vacuum zone and a pressing zone, slurry is dewatered in the vacuum zone to form a filter cake, then the filter belt holds the filter cake and enters the pressing zone together, winding is pressed and dewatered by a multi-stage press roll, and finally the material is discharged at the discharge end. Because the independent vacuum area is increased, the occupied area of the equipment is large, the length is long, and the problems of single squeezing means and low squeezing force exist.

In chinese patent literature, the utility model is entitled "vacuum filter with filter-pressing function", and document with publication number CN 203678133U discloses a filtering scheme (see fig. 3), the vacuum area and the press area of the equipment are combined together, the material is wrapped by two filter cloths after gravity dehydration and goes through a vacuum drum with vacuum, and vacuum filtration dehydration is carried out while press dehydration. Because the equipment is only provided with one group of pressing vacuum dehydration, the volume of the vacuum rotary drum is inevitably large, and the generated pressing force is extremely low, therefore, the dehydration capability is extremely low, the energy consumption is high, the dehydration effect is not ideal, and the equipment can not meet the occasions with high requirements.

Disclosure of Invention

The invention aims to provide a sludge dewatering machine which is small in size, and can separate solid and liquid of sludge more quickly and thoroughly by the actions of multiple means such as squeezing, shearing, vacuum adsorption and linear extrusion.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a sludge dewaterer, includes the frame and connects the charging means in the frame upper end, its characterized in that, still including connecting in the last filter belt of frame, lower filter belt and squeezing mechanism, the lower filter belt sets up in the below of charging means, go up the filter belt and all twine through squeezing mechanism with lower filter belt to motion syntropy in squeezing mechanism, squeezing mechanism is including the vacuum press roll and the press roll that set up in turn, the vacuum press roll includes first vacuum press roll, first vacuum press roll and the equal sliding connection of press roll in the frame can follow the frame and carry out the reciprocating motion on the horizontal direction. This scheme sets up first vacuum squeeze roll and the squeeze roll of reciprocating motion on vacuum squeezing mechanism's basis, through applying the extrusion force, can produce the linear extrusion of high strength in first vacuum squeeze roll and squeeze roll, on the basis of effectively utilizing the space, effectively promotes the dewatering effect.

Preferably, 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, and the upper filter belt and the lower filter belt are wound around the second vacuum press roll and distributed between the press roll and the first vacuum press roll in an S-shaped winding manner.

Preferably, a plurality of vacuum pipelines are circumferentially arranged in the first vacuum press roller, the outer surface of the first vacuum press roller is provided with vacuum liquid suction ports and liquid collection grooves corresponding to the vacuum quantity, the vacuum pipelines are communicated to the vacuum liquid suction ports, and a vacuum pumping area is formed on the outer surface of the first vacuum press roller through the liquid collection grooves.

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

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

As the preferred scheme, the air guide disc assembly further comprises a mounting seat and a pipe joint, the mounting seat is connected to the bearing seat, the air guide disc body is connected between the mounting seat and the pipe joint, a second arc-shaped opening matched with the first arc-shaped opening is formed in the contact surface of the pipe joint and the air guide disc body, a plurality of arc-shaped mounting grooves are formed in the circumferential direction of the mounting seat, and the pipe joint is mounted in the mounting grooves.

Preferably, the sludge dewatering machine further comprises a pressurizing mechanism, the pressurizing mechanism comprises a pressurizing belt and a pressurizing roller arranged above the pressurizing belt, the pressurizing belt passes through the second vacuum press roller and is distributed between the press roller and the first vacuum press roller in an S-shaped winding manner together with the upper filter belt and the lower filter belt, the pressurizing roller can reciprocate towards the direction close to or away from the pressurizing belt, and when the pressurizing roller moves towards the direction close to the pressurizing belt, the pressurizing roller is abutted to the pressurizing belt. The pressing belt is a flexible high-strength belt or a steel belt with two ends butted to form a ring shape, and the pressing belt is applied with high-strength pretightening force through the pressing roller, so that the pressing belt generates high-strength pressing force on the upper filter belt, and the pressing clamping force between the upper filter belt and the lower filter belt is enhanced.

Preferably, the pressurizing mechanism further comprises a pressing roller, the pressing roller is arranged above the first vacuum press roller, the pressurizing belt passes through the vacuum press roller and the press roller and then is wound around the pressing roller, the pressing roller reciprocates in a direction close to or away from the first vacuum press roller, and when the pressing roller moves in a direction close to the first vacuum press roller, the pressing roller abuts against the first vacuum press roller. The pressing roller is used for applying linear extrusion with higher strength to the dehydration interlayer on the first vacuum squeezing roller, so that the squeezed 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 going up the filter belt, filter belt down respectively, guiding mechanism includes sliding connection to the adjusting roll of frame, and two adjusting rolls butt respectively to last filter belt and filter belt down, 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, so that the material to be dehydrated can be more uniformly laid.

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 squeezing mechanism, and linear squeezing is carried out among roller bodies by arranging the pressurizing mechanism in the squeezing mechanism, arranging the pressure applying roller capable of reciprocating in the vertical direction, the first vacuum squeezing roller and the squeezing roller capable of reciprocating in the horizontal direction, so that the space can be effectively utilized, the occupied area is small, and meanwhile, the equipment has high-strength squeezing capacity, high-strength squeezing capacity and vacuum filtration function, and can realize more rapid and more thorough separation of solid and liquid of sludge under the actions of multiple means of squeezing shearing, vacuum adsorption, high-strength pressing force of a pressurizing belt and linear squeezing, and the product has lower water content. Meanwhile, the air guide disc assembly arranged on the vacuum press roller also enables the suction filtration and liquid collection effects of the vacuum equipment to be better.

Drawings

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

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

FIG. 3 is a schematic structural view of a conventional vacuum filter with a filter-pressing function;

FIG. 4 is a schematic view showing the overall structure of the sludge dehydrator according to the present invention;

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

FIG. 6 is a simplified structural view of the sludge dewatering machine of the present invention;

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

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

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

fig. 10 is a schematic structural view of the pipe joint of the present invention.

The various reference numbers in the figures mean:

1. a frame; 2. a feeder; 3. a lower filter belt; 4. a second vacuum press roll; 41. a vacuum line; 42. a vacuum liquid suction port; 43. a liquid collection groove; 5. applying a pressure roller; 6. a pressure roller; 7. a pressurizing oil cylinder; 81. cleaning the spray pipe; 82. cleaning the water receiving tray; 91. an upper drive roller; 92. a lower drive roller; 10. an upper filter belt; 11. a pressing belt; 12. scraping the material device; 13. an air guide disk assembly; 14. a first vacuum press roll; 15. a press roll; 16. a deviation rectifying roller; 17. a squeezing water pan; 18. a bend roller; 19. a tension roller; 201. A leveling roller; 202. adjusting a lead screw; 131. an air guide disc body; 132. a mounting seat; 133. a pipe joint; 134. a first arcuate port; 135. a second arcuate mouth; 136. and (4) mounting the groove.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to 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 those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Referring to fig. 4-6, the present embodiment discloses a sludge dewatering machine, which includes a frame 1, the frame 1 plays a role of supporting and assisting connection for 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 to the frame 1, a certain height difference exists on the left and right sides of the frame 1, which is convenient for matching the upper and lower filter belts 3, in the present embodiment, the frame 1 is in a shape of low left and high right, the upper filter belt 10 is arranged on the upper right side of the frame 1, and is tensioned into a closed loop by a roller component and the squeezing mechanism, the lower filter belt 3 is arranged on the lower left side of the frame 1 and is tensioned into a closed loop by the roller component and the squeezing mechanism, the directions of the whole movement of the upper filter belt 10 and the lower filter belt 3 are opposite, and the parts of the squeezing mechanism move in the same direction. The right side end of the frame 1 is connected with an upper driving roller 91 and a lower driving roller 92 which are oppositely arranged, the upper filter belt 10 and the lower filter belt 3 are respectively wound by 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 is meshed with the upper driving roller 91. Be connected with charging means 2 in the upper end of frame 1, lower filter belt 3 sets up in the below of charging means 2, treats that the dehydration material feeds into to the upper surface of lower filter belt 3 through charging means 2 to by the drive of lower filter belt 3 move, via the intersection with last filter belt 10, treat that the dehydration material is by

last filter belt

10, 3 parcels of lower filter belt and get into squeezing mechanism jointly and dewater, later from driving roller 91, driving roller 92 from driving down and unloading. In this embodiment, the feeder 2 is preferably a twin screw feeder, which allows a more uniform lay of the material to be dewatered.

Squeezing mechanism includes the vacuum squeeze roll that sets up in turn and presses roller 15, go up filter belt 10, filter belt 3 wraps up the filter cake and twines in proper order and presses roller 15 and vacuum squeeze roll through pressing, it advances to be S-shaped tortuous, for promoting the filter-pressing effect, vacuum squeeze roll further includes first vacuum squeeze roll 14 and second vacuum squeeze roll 4, first vacuum squeeze roll 14 with press roller 15 and all establish to a plurality of groups, arrange along 1 level of frame, 4 quantity of second vacuum squeeze roll set up to a set of, set up in the top of pressing roller 15. One end of the lower filter belt 3 is wound forwards on the second vacuum press roller 4 through the lower part of the double-screw feeder, then is sequentially wound on the press roller 15 and the first vacuum press roller 14, finally bypasses the lower driving roller 92 and passes through the scraper 12 at the lower end of the lower driving roller 92 side, and is 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 in direction by the direction-changing roller 18, and then winds together with the lower filter belt 3 through the second vacuum press roll 4, and winds through the press roll 15 and the first vacuum press roll 14 in turn, finally winds around the upper drive roll 91 and passes through the scraper 12 at the upper end of the upper drive roll 91 side, and is connected with the other end thereof to form a closed loop.

The second vacuum press roll 4 has the same structure as the first vacuum press roll 14, and the second vacuum press roll 4 is taken as an example to describe the structure, referring to fig. 7 and 9, the second vacuum press roll 4 includes a plurality of vacuum pipes 41 arranged circumferentially inside, vacuum liquid suction ports 42 arranged on the outer surface thereof and corresponding to the number of the vacuum pipes 41, and a liquid collecting groove 43 communicated with the vacuum liquid suction ports 42, one end of the vacuum pipe 41 is communicated with the shaft end of the second vacuum press roll 4 and externally connected with a vacuum-pumping device, and the other end is communicated with the vacuum liquid suction ports 42, and a vacuum-pumping area is formed on the outer surface of the second vacuum press roll 4 through the liquid collecting groove 43. The filter cake is wrapped by the upper filter belt 10 and the lower filter belt 3, the filter cake moves to the squeezing mechanism and is wound, materials are dehydrated under the dual effects of squeezing shearing force and vacuum pumping force, the dehydrated materials form a compact filter cake, meanwhile, the separated filter liquid can be rapidly pumped away under the vacuum effect, and the situation that the water content of the filter cake rises due to the fact that the filter liquid contacts the filter cake again is avoided. Furthermore, at least two squeezing rollers 15 are arranged, and the squeezing rollers 15 and the first vacuum squeezing roller 14 are alternately arranged, so that the upper filter belt 10 and the lower filter belt 3 wrap the filter cake and sequentially wrap the filter cake to pass through the squeezing rollers 15 and the first vacuum squeezing roller 14 and move forward in an S-shaped zigzag manner, when wrapping the filter cake through the squeezing rollers 15, the filter cake is positioned on the lower surface of the squeezing rollers 15, and squeezing liquid is collected by a squeezing water receiving tray 17 connected below the squeezing mechanism, so that the squeezing liquid is prevented from contacting the filter cake again; when the filter cake passes through the first vacuum press roller 14, the filter cake is positioned on the upper surface of the first vacuum press roller 14, and the filtrate is filtered downwards, so that the accumulated liquid in the vacuum pipeline 41 is prevented from influencing the moisture of the filter cake. Referring to fig. 8 and 10, in a preferred embodiment, the squeezing mechanism further comprises an air guide disc assembly 13, the air guide disc assembly 13 is connected to the axial side end of the vacuum squeezing roller and is used for communicating with a vacuum pumping device, and the air guide disc assembly 13 is arranged for ensuring that the area covered by the upper filter belt 3 and the area uncovered by the lower filter belt 3 in the vacuum squeezing roller are communicated with vacuum, so that the arrangement is beneficial to energy conservation and consumption reduction, and the adsorption and liquid collection effects of the vacuum device are better. The air guide plate assembly 13 comprises an air guide plate body 131, an installation seat 132 and a pipe joint 133, the pipe joint 133 and the installation seat 132 are fastened and connected by using bolts, the vacuumizing equipment is communicated through the pipe joint 133, the air guide plate body 131 is connected between the installation seat 132 and the pipe joint 133, the installation seat 132 is fixedly connected onto a bearing seat at the axial side end of the vacuum press roller, the outlet end of a vacuum pipeline 41 of the vacuum press roller penetrates through the installation seat 132, the air guide plate body 131 is in a circular plate shape and is made of a ceramic wear-resistant material, the end surface of the air guide plate body is subjected to mirror surface treatment to cover the outlet end of the vacuum pipeline 41, a first arc-shaped opening 134 is arranged on the air guide plate body, the first arc-shaped opening 134 is matched with the arc-shaped vacuum pipeline 41 arranged in the circumferential direction, part of the outlet end of the vacuum pipeline 41 is communicated with the vacuumizing equipment through the first arc-shaped opening 134, namely, the area of a liquid collecting groove 43 covered by the upper and the lower filter belt 3 is communicated with the vacuumizing equipment. An adapter plate is fixedly connected to the position of the outlet end of the vacuum pipeline 41, namely the shaft end port of the vacuum press roller, a plurality of through holes matched with the outlet end of the vacuum pipeline 41 are formed in the circumferential direction of the adapter plate, the air guide plate body 131 abuts against the adapter plate, the adapter plate rotates along with the vacuum press roller, the adapter plate is made of ceramic wear-resistant materials, and the end face of the adapter plate is subjected to mirror surface treatment, so that the friction force between the air guide plate body 131 and the adapter plate can be reduced. In order to improve the vacuum adsorption 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 seat 132 is provided with a plurality of arc-shaped mounting grooves 136 in the circumferential direction, 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 pressurizing mechanism further comprises a pressurizing belt 11 and a pressurizing roller 6 arranged above the pressurizing belt 11, the pressurizing belt 11 is a flexible high-strength belt with two ends butted to form a ring-shaped steel belt or other materials, the pressurizing belt 11 passes through the second vacuum press roller 4, is wound and distributed between the press roller 15 and the first vacuum press roller 14 in an S shape together with the upper filter belt 10 and the lower filter belt 3, passes through the lower part of the pressurizing roller 6, and is connected with the other end 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 are overlapped to form a dewatering interlayer, and the upper filter belt 10, the lower filter belt 3 and the pressing belt 11 are synchronously operated and move in the same direction in the dewatering interlayer. Bearing frame sliding connection is passed through at the axial both ends of impression roller 6 in frame 1, bearing frame and frame 1 are equipped with the spout and the guide rail of matching respectively in corresponding position, and then, impression roller 6 can be at vertical direction up-and-down motion, can be to the direction reciprocating motion that is close to or keeps away from pressurization area 11, when the direction motion that is close to

pressurization area

11, 6 butt of impression roller to pressurization area 11, through the pretightning force of 6 pairs of pressure area 11 applys high strength, make pressurization area 11 produce the squeezing force of high strength to last filtering band 10, filtering band 10 and the extrusion clamp force between the filtering band 3 down in the reinforcing. Further, the upper end of the frame 1 is connected with two pressurizing oil cylinders 7, the piston rod ends of the two pressurizing oil cylinders 7 are respectively connected to the two bearing seats, and the pressurizing roller 6 is controlled by the pressurizing oil cylinders 7 to reciprocate. The materials are wrapped by the upper filter belt 10 and the lower filter belt 3, attached with the pressurizing belt 11, run to the second vacuum press roller 4 and are wound, then at the first vacuum press roller 14 and the press roller 15, the materials are dehydrated under the triple actions of pressing shearing force, pressing force and vacuum pumping force, the dehydrated materials form compact filter cakes, and meanwhile, 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 perform reciprocating motion 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 blocks, the bearing blocks and the frame 1 are respectively provided with matched sliding chutes and guide rails at corresponding positions, and downward pressure is applied to the pressure belt 11 through the pressure roll 6 to enable the pressure belt 11 to be tightened, so that the first vacuum press roll 14 and the press roll 15 move and are pressed together, and linear pressing 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 a pressing roller 5 disposed above the first vacuum press roller 14, the number of the pressing roller 5 is the same as that of the first vacuum press roller 14, one end of the pressing belt 11 is wound around the second vacuum press roller 4, and then distributed between the pressing roller 15 and the first vacuum press roller 14 in an S-shaped winding manner together with the upper filter belt 10 and the lower filter belt 3, and then wound through the pressing roller 5, passes under the pressing roller 6, and is connected to the other end thereof 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 the pressing roller 5 can reciprocate along the vertical direction of the frame 1, i.e. can reciprocate towards or away from the first vacuum squeezing roller 14, and the connection manner of the pressing roller 5 and the frame 1 and the pressing roller 6 are not described herein again. When the pressing roller 5 moves towards the direction close to the first vacuum press roller 14, the pressing roller 5 abuts against the first vacuum press roller 14, the pressing belt 11 drives the pressing roller 5 to rotate, the pressing roller 5 can be pressed on the first vacuum press roller 14 by applying downward pressure to the pressing belt 11 through the pressing roller 6, and linear pressing is applied to a dewatering interlayer between the pressing roller 5 and the first vacuum press roller 14. The number of the pressure applying rollers 5 and the first vacuum squeezing rollers 14 can be set according to the process requirements and the material characteristics, and in other embodiments, the number of the pressure applying rollers 5 can be smaller than the number of the first vacuum squeezing rollers 14. The upper filter belt 3 and the lower filter belt 3 are wrapped by the pressurizing belt 11 and wound through the second vacuum press roller 4, the pressurizing oil cylinder 7 enables the pressurizing belt 11 to generate a great pre-tightening force through the pressurizing roller 6, the pressurizing belt 11 with the pre-tightening force generates a high-strength extruding force on the first vacuum press roller 14 for the dehydration interlayer, the pressurizing roller 5 applies a linear extrusion with higher strength on the first vacuum press roller 14 for the dehydration interlayer and a linear extrusion between the first vacuum press roller 14 and the press roller 15, and meanwhile, the vacuum auxiliary suction filtration enables the press liquid to be separated rapidly, so that the product can achieve the best dehydration effect.

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 degrees of the upper filtering belt 10 and the lower filtering belt 3, and the sludge dewatering machine can also adapt to filtering belts with different lengths. The two adjusting mechanisms have the same structure, the middle adjusting mechanism is taken as an example for structural introduction, the adjusting mechanism comprises an adjusting screw 202 and an adjusting roller 201, two axial ends of the adjusting roller 201 are slidably connected to the frame 1 through an adjusting seat and can reciprocate along the horizontal direction of the frame 1, the adjusting roller 201 is abutted to the lower filter belt 3, the tension of the lower filter belt 3 is adjusted through the reciprocating movement in the horizontal direction, a nut end of the adjusting screw 202 is fixedly connected to the frame 1, one end of the adjusting screw 202 is fixedly connected to the adjusting seat, the other end of the adjusting screw 202 is in threaded connection with the edge of the frame 1, and the adjusting screw 202 is rotated to drive the moving distance of the adjusting roller 201 in the horizontal direction.

Further, in the sludge dewatering machine provided by the invention, the roller body assembly 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 direction changing roller 18 which is used for adjusting the direction of the upper and lower filter belts 3, wherein the arrangement of the roller body assembly is the prior art, and the description is omitted; furthermore, 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 pan 82 arranged below the cleaning spray pipe 81, wherein the cleaning spray pipe 81 and the cleaning water pan 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 respectively drives the upper filter belt 3 and the lower filter belt 3 to synchronously run through the driving motor, the materials to be dewatered are arranged on the lower filter belt 3 at the feeding end of the equipment by the double-screw feeder, the materials are gradually wrapped by the upper filter belt 3 and the lower filter belt 3 and are wound through the second vacuum press roll 4 along with the running of the lower filter belt 3, the materials are pressed to form filter cakes under the combined action of shearing force and vacuum, the press liquid is quickly pumped away, then the upper filter belt 3 and the lower filter belt 3 carry the filter cakes and are sequentially wound through a plurality of alternately arranged press rolls 15 and a first vacuum press roll 14 together with the pressure belt 11, the materials are sequentially subjected to high-strength pressing, vacuum dewatering and linear pressing and vacuum dewatering for several times, the water in the filter cakes are removed to the maximum extent, after the optimal dewatering effect is achieved, the upper filter belt 3 and the filter cakes are separated from the pressure belt 11 and respectively bypass the upper drive roll 91 and the lower drive roll 92, the filter cakes are discharged under the combined action of gravity and the scraper 12, and are cleaned at the cleaning spray pipe 81 to obtain regeneration, and then sequentially pass through the assembly and the lower roll body 201, and enter the dewatering roll body in a cycle.

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 of environmental protection, chemical industry, metallurgy, brewing, ceramics and the like.

The foregoing shows and describes the general principles, essential 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 embodiments described above, and the preferred embodiments of the present invention are described in the above embodiments and the description, and are not intended to limit the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. The utility model provides a sludge dewaterer, includes frame (1) and connects in feeder (2) of frame (1) upper end, its characterized in that, still including connecting in last filter belt (10), lower filter belt (3) and the squeezing mechanism of frame (1), lower filter belt (3) set up in the below of feeder (2), go up filter belt (10) and lower filter belt (3) and all twine through squeezing mechanism to motion syntropy in squeezing mechanism, squeezing mechanism is including the vacuum squeeze roll that sets up in turn and squeeze roll (15), the vacuum squeeze roll includes first vacuum squeeze roll (14), first vacuum squeeze roll (14) and squeeze roll (15) equal sliding connection in frame (1) can follow frame (1) and carry out reciprocating motion on the horizontal direction.

2. The sludge dewatering machine of claim 1, further comprising a second vacuum press roll (4) arranged above the press roll (15), wherein the first vacuum press roll (14) and the second vacuum press roll (4) have the same structure, the upper filter belt (10) and the lower filter belt (3) are wound around the second vacuum press roll (4), and are wound and distributed between the press roll (15) and the first vacuum press roll (14) in an S shape.

3. The sludge dewatering machine according to claim 1, wherein a plurality of vacuum pipes (41) are circumferentially arranged inside the first vacuum press roll (14), the outer surface of the first vacuum press roll (14) is provided with vacuum liquid suction ports (42) and liquid collection grooves (43) corresponding to the number of the vacuum pipes (41), the vacuum pipes (41) are communicated with the vacuum liquid suction ports (42), and a vacuum filtration area is formed on the outer surface of the first vacuum press roll (14) through the liquid collection grooves (43).

4. The sludge dewatering machine according to claim 3, characterized in that the squeezing mechanism further comprises an air guide disc assembly (13), the air guide disc assembly (13) is connected to a bearing seat at the axial side end of the vacuum press roll and is used for communicating the area covered by the upper filter belt (10) and the lower filter belt (3) in the vacuum press roll with a vacuum-pumping device.

5. The sludge dewatering machine according to claim 4, characterized in that the air guide disc assembly (13) comprises an air guide disc body (131), the air guide disc body (131) covers the outlet end of the vacuum pipe (41), a first arc-shaped opening (134) is arranged on the air guide disc body (131), the first arc-shaped opening (134) is matched with the vacuum pipe (41) arranged circumferentially in an arc shape, and the air guide disc body is used for enabling the liquid collecting channel (43) covered by the upper filter belt (10) and the lower filter belt (3) to be communicated with a vacuum pumping device.

6. The sludge dewatering machine according to claim 4, wherein the air guide disc assembly (13) further comprises an installation seat (132) and a pipe joint (133), the installation seat (132) is connected to the bearing seat, the air guide disc body (131) is connected between the installation seat (132) and the pipe joint (133), a second arc-shaped opening (135) matched with the first arc-shaped opening (134) is arranged on the contact surface of the pipe joint (133) and the air guide disc body (131), a plurality of arc-shaped installation grooves (136) are formed in the circumferential direction of the installation seat (132), and the pipe joint (133) is installed in the installation grooves (136).

7. The sludge dewatering machine according to claim 1, further comprising a pressurizing mechanism, wherein 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 press roll (4), and is wound and distributed in an S shape between the press roll (15) and the first vacuum press roll (14) together with the upper filter belt (10) and the lower filter belt (3), the pressurizing roller (6) can reciprocate towards or away from the pressurizing belt (11), and when the pressurizing roller moves towards the pressurizing belt (11), the pressurizing roller (6) is abutted to the pressurizing belt (11).

8. The sludge dewatering machine of claim 7, wherein the pressurizing mechanism further comprises a pressure applying roller (5), the pressure applying roller (5) is arranged above the first vacuum press roller (14), the pressurizing belt (11) passes through the vacuum press roller and the press roller (15) and then is wound around the pressure applying roller (5), the pressure applying roller (5) reciprocates in a direction close to or away from the first vacuum press roller (14), and when the pressure applying roller (5) moves in a direction close to the first vacuum press roller (14), the pressure applying roller (5) is abutted to the first vacuum press roller (14).

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

10. Sludge dewatering machine according to claim 1, characterized in that the feeder (2) is a double screw feeder.