CN106365411B - A sludge thickening and dehydration integrated machine - Google Patents

Abstract

The invention relates to a sludge concentration and dehydration integrated machine, which includes a frame, a sludge concentration device and a sludge dewatering device. The sludge concentration device includes an isolation cylinder; and a concentration unit formed by a plurality of scrapers, a driving mechanism, and a flow guide element. Cylinder, a driving mechanism for driving the extrusion drum to rotate around the horizontal axis, an extrusion area with a sludge outlet is formed between the extrusion drum and the mud outlet, and a water filter hole or a water filter assembly is provided on the wall of the extrusion drum for water to pass through. The invention simplifies the structure, reduces the cost, and is convenient for transportation; at the same time, the stability of the sludge is ensured, and the solid content of the treated sludge is increased to more than 20%.

Description

A sludge thickening and dehydration integrated machine

technical field

The invention relates to a sludge thickening and dewatering integrated machine.

Background technique

With the development of social economy and the acceleration of urbanization, the amount of urban sewage treatment plants and the accompanying sludge has increased rapidly. According to relevant materials, in 2010, the sludge produced by my country's sewage treatment plants reached 300 million tons. Since sludge must undergo biochemical and flocculation treatment during dehydration, and the dehydrated sludge contains a large amount of cell water and attached water. At present, the existing equipment and technology of almost all sewage treatment plants can only reduce the moisture content of sludge to about 80%. If the water content of sludge is lower than 50% to meet the requirements of incineration, it will cost a lot of money. Therefore, almost all sewage treatment plants in my country often can only use sludge as landfill and stacking, which has caused serious environmental pollution problems.

In the prior art, the sludge treatment device usually includes a sludge thickening device and a dehydrator that are independently installed. When performing sludge treatment, the sludge thickening device is used to concentrate the relatively thin sludge, and the sludge with reduced water content after concentration is dehydrated in the dehydrator. This sludge treatment method, firstly, requires a large investment in equipment, takes up a large space, consumes a lot of energy, and has high operating costs; secondly, the existing sludge thickening device is prone to blockage, resulting in low work efficiency, high operating costs, and limited effect on sludge concentration. In recent years, some people have also reported the concentration and dehydration integrated machine, but the treatment effect of the existing concentration and dehydration integrated machine is significantly lower than that of the traditional concentration and dehydration device, and the structure is complicated and the use cost is high.

For example, CN101759343A discloses a thickening device in sludge treatment, which includes a tank and an isolation cylinder located in the tank. The isolation cylinder separates the tank body into an inner and outer coaxial drainage cavity and a concentration zone. The upper part of the isolation cylinder is a circular filter screen cylinder and the lower part is a conical bottom. Agitator is installed on the tank body. Agitation paddles are installed in the concentration zone and there are flocculated sewage inlets at the upper end and concentrated mud outlets at the lower end. The paddle is installed on the isolation cylinder through the paddle support plate, the drainage chamber is located in the isolation cylinder, and the concentration area is located outside the isolation cylinder. At the same time, a mud scraper is fixed in the concentration area, and the mud scraper is located between the paddle and the filter screen cylinder. The concentration principle of the concentration device of this structure is: the sludge enters the concentration zone from the sewage, and the stirring paddle stirs the sludge in the concentration zone, and the isolation cylinder rotates at the same time. During this process, the water in the sludge enters the drainage cavity through the mesh of the isolation cylinder and separates from the mud. The device scrapes off the sludge attached to the filter screen cylinder by the friction between the scraper and the outer wall of the filter screen cylinder of the isolation cylinder. Obviously, since the above-mentioned scraper is fixed, the filter cylinder needs to be rotated once to scrape off the sludge adhering to the outer periphery of the filter cylinder. Therefore, the mesh of the filter cylinder is easily blocked by sludge. Due to the blockage of the mesh, the concentration efficiency will be significantly reduced, and finally the concentration cannot be continued. In this way, not only the working efficiency is affected, but the concentration effect is also unsatisfactory. And this device will drive the isolation cylinder and the water in it to rotate and is also provided with a stirring paddle, so the operating cost and energy consumption are relatively high.

In view of the above deficiencies, the applicant made a new application on January 29, 2015, CN104591520A, which mainly discloses a sludge thickening and dewatering integrated machine, which includes a frame, a sludge thickening device and a sludge dewatering device arranged on the frame. The sludge outlet at the end is connected to the sludge dehydration device. The sludge thickening device also includes a scraper group. The scraper group includes a plurality of scrapers that can be rotated around the horizontal axis together. One side of each scraper along its length is in contact with the inner wall of the isolation cylinder with water filter holes. The cylinder is fixed, and the scraper rotates to scrape off the sludge at the filter mesh;

The sludge dewatering device is an electro-osmotic sludge dewatering device. The integrated sludge thickening and dewatering machine also includes a driving device and a power supply for providing power to the sludge dewatering device. The sludge dewatering device specifically includes an annular upper guide rail fixed on the frame, an annular lower guide rail fixed on the frame and located below the annular upper guide rail, a plurality of moving screen plates that can move along the track of the annular lower guide rail, and a plurality of extrusion plates that can move along the track of the annular upper guide rail. Extending, the lower part of the ring-shaped upper guide rail is a straight track, and the upper part of the ring-shaped lower guide rail is a straight track. Both the moving screen plate and the extruding plate are made of conductive materials, and the two are respectively connected to the cathode and anode of the power supply; a sludge extrusion channel is formed between a plurality of extrusion plates on the linear track of the ring-shaped upper guide rail and a plurality of moving screen plates on the linear track of the ring-shaped lower guide rail. The height of the sludge extrusion channel gradually decreases from one end to the other end. It is located above the moving net plate, and the direction in which the sludge is discharged from the sludge outlet is the same as the moving direction of the moving net plate on the straight track.

However, in actual operation, it has the following shortcomings:

1) The sludge is dehydrated by electroosmosis and extrusion, so that the treated sludge can be directly incinerated or landfilled. Therefore, the production line is very long, the volume is large, and the equipment operation cost is high;

2) The movement or transportation of the overall equipment is also very difficult, unable to meet the needs of different users, and lacks flexibility;

3) The sludge discharge stability of the concentration device is poor (the solid content of the discharge sludge is not uniform), which is not conducive to the next dehydration operation; at the same time, the concentration effect is not significant enough.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and provide an improved sludge thickening and dewatering integrated machine.

In order to solve the above technical problems, the present invention takes the following technical solutions:

A sludge thickening and dewatering integrated machine, which includes a frame, a sludge thickening device and a sludge dewatering device arranged on the frame. The sludge thickening device includes an isolation cylinder with a water filter mesh on the side wall, a plurality of scrapers that can be rotated around a horizontal axis, a drive mechanism for driving the rotation of the plurality of scrapers, and a flow guide element fixed on each scraper to make the sludge tend to move closer to the middle of the isolation cylinder. One side of the extension is in contact with the inner side wall of the isolation cylinder which is provided with filter mesh holes. The upper and lower parts of the isolation cylinder are respectively provided with a sludge inlet for feeding the sludge to be concentrated and a sludge outlet for discharging the concentrated sludge, and are vertically arranged. In particular, multiple mud scrapers, driving mechanisms and flow guide elements form a concentration unit that facilitates sludge concentration and prevents the filter mesh from being blocked. The isolation cylinder is divided from top to bottom. In the thickening unit, the multiple scrapers of each adjacent two thickening units rotate in opposite directions to form a squeezing force, and guide the squeezed sludge to the sludge outlet. When the sludge thickening device is working, the isolation cylinder is fixed, and the scraper rotates to scrape off the sludge at the filter mesh; the sludge dewatering device includes a horizontally arranged squeezing roller located below the sludge outlet of the sludge thickening device, and a driving mechanism for driving the squeezing roller to rotate around the horizontal axis. There are filter holes or water filter components on the cylinder wall for water supply. When the extrusion drum rotates, the sludge located in the extrusion area is squeezed, and the extruded sludge is guided to the sludge outlet under the rotation of the extrusion drum, and the extruded water is discharged from the water filter holes or water filter components on the wall of the extrusion drum outside the extrusion area.

Preferably, rotating shafts that can rotate around their own axes and are arranged parallel to each other are respectively provided on the water-permeable area and the extrusion area of the isolation cylinder. The shafts are connected to the driving mechanism or integrally arranged, and multiple shafts are arranged side by side in the extrusion area.

Preferably, the scraper is fixed on the rotating shaft, and a plurality of scrapers constituting each scraper group are evenly distributed along the radial direction of the rotating shaft.

According to a specific implementation and a preferred aspect of the present invention, the scrapers of each adjacent two groups of thickening units are interlocked and arranged. It makes the sludge extruded stronger, thus improving the concentration effect.

Preferably, an included angle of 8-20° is formed between the plane where the scraper is located and the inner side wall of the isolation cylinder that is in contact with the scraper. Forming such an included angle is not only beneficial to improving the mud scraping effect, but also can reduce the friction between the scraper and the isolation cylinder during the rotation process, reduce the wear of the mud scraper and the isolation cylinder, and is also beneficial to energy saving.

Preferably, the deflector element includes a plurality of deflectors, which are distributed along the length direction of the scraper and are spaced apart from two adjacent deflectors, and an included angle of 45-75° is formed between the plane where each deflector is located and the inner side wall of the isolation cylinder in contact with the scraper. The setting of the deflector can effectively keep the flocs in the sludge away from the water filter net, and facilitate the water in the sludge to flow to the side wall of the isolation cylinder and be discharged through the water filter mesh, thereby improving the concentration efficiency and concentration effect.

According to yet another specific implementation and preferred aspect of the present invention, the isolation cylinder is a square cylinder, the filter meshes are arranged on two opposite side walls of the isolation cylinder, each set of concentration units has a scraper group, and the scrapers of each scraper group are respectively in contact with two opposite side walls of the isolation cylinder, the distance between the two opposite side walls is 120-300 cm, and the distance between the end edge of the deflector away from the scraper and the inner side wall of the isolation cylinder is 60-150 cm. According to a large number of experimental studies by the inventor, it is found that when other structures are the same, the concentration effect of the square isolation cylinder of the present invention is significantly improved compared with the traditional circular isolation cylinder.

Preferably, the deflectors on each mud scraper group on both sides are staggered from each other; the water filter meshes are distributed along the entire height of the isolation cylinder or only along a section of the height of the isolation cylinder.

Preferably, the sludge dewatering device further includes a scraper assembly arranged on one side of the sludge outlet for scraping the sludge remaining on the surface of the extrusion drum and discharging it from the outlet, and a sealing plate assembly for sealingly connecting the extrusion drum to the other side of the sludge outlet to prevent unextruded sludge from being discharged, wherein the mud outlet, the upper part of the extrusion drum, and the scraper assembly and the sealing assembly form an extrusion area, and the outlet is located on the mud scraper assembly.

Further, the mud scraping assembly includes an extension plate extending obliquely downward and outward from one side of the mud outlet, and a scraper extending vertically from the lower end of the extension plate to the opposite side of the upper part of the extrusion drum and contacting the surface of the extrusion drum, wherein the outlet is located in the middle of the scraper, and the outlet is extended along the length direction of the extrusion drum.

According to yet another specific implementation and preferred aspect of the present invention, there is also a guide chute at the outlet to facilitate the export of sludge out of the integrated machine, wherein the guide chute includes a receiving bottom plate whose upper end touches the outside of the scraper and is located below the outlet (detection area), side panels located on both sides of the receiving bottom plate, and a connecting part for connecting the lower end of the receiving bottom plate to the frame. The included angle between the receiving bottom plate and the horizontal plane is 15-60°. Among them, 30° is the best.

Preferably, the sludge dewatering device also includes a brush assembly that is installed on the frame and can extend into the filter assembly or the filter hole to remove residual sludge, and a spray mechanism for flushing the brush assembly and the filter assembly or the filter hole, wherein the spray mechanism is located above the brush assembly. to turn.

In addition, the sludge thickening device also includes a mud discharge damper which is arranged in the squeeze area and can rotate around a horizontally arranged pivot to adjust the amount of mud discharge, wherein the pivot is in line with the extension direction of the squeeze drum and is located on one side of the sludge outlet. The mud discharge damper can be used to control the amount of mud discharge and the water content of the mud discharge.

At the same time, the bottom of the square cylinder is open to form the mud outlet, and the extrusion drum is of a single-layer or multi-layer structure; the extrusion drum extends along the length of the mud outlet, and a reinforcing plate is provided inside the extrusion drum; the water filter holes are elongated slit holes; end covers are provided at both ends of the extrusion drum; through holes are opened on the end covers (to reduce self-weight).

Due to the implementation of the above technical solutions, the present invention has the following advantages compared with the prior art:

On the one hand, the present invention simplifies the structure of the sludge dewatering device, facilitates the dewatering operation, reduces the cost, and is also convenient for transportation; on the other hand, through the arrangement of multiple concentration units, the stability of the sludge discharge is ensured, and the cooperation with the extrusion roller increases the solid content of the treated sludge to more than 20%.

Description of drawings

Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

Fig. 1 is a schematic structural view of the concentration and dehydration integrated machine (sludge concentration and dehydration integrated machine) of the present invention;

Figure 2 is a schematic structural view of the integrated thickening and dewatering machine (sludge thickening and dewatering integrated machine) in Figure 1 (turning 180° around the vertical center and omitting the shell);

Fig. 3 is a half-section schematic diagram of Fig. 1;

Fig. 4 is a schematic front view of the structure of the sludge thickening device in Fig. 1;

Fig. 5 is a schematic cross-sectional view of the A-A direction in Fig. 4;

Fig. 6 is a partial top view enlarged schematic diagram of the enrichment device;

Among them: 1. Rack; 2. Mud dehydration device; 20. Squeeze roller; 21. Drive unit; 22. Scraper assembly; 220. Extension plate; 221. Scraper; 23. Sealing plate assembly; 24. Guide trough; 240. Accepting bottom plate; , sludge thickening device; 30, isolation cylinder; 300, water filter mesh; 31, mud scraper group; 310, mud scraper; 32, rotating shaft; 33, guide element; 330, deflector; 34, mud baffle;

Detailed ways

As shown in FIGS. 1 to 6 , the integrated sludge thickening and dewatering machine provided in this embodiment includes a frame 1 , a sludge dewatering device 2 and a sludge thickening device 3 arranged on the frame 1 .

The sludge thickening device 3 includes an isolation cylinder 30 with a filter mesh 300 for water supply on the side wall, a plurality of scrapers 310 that can be rotated together around a horizontal axis, a drive mechanism 35 for driving the rotation of the plurality of scrapers 310, and a flow guide element 33 that is fixedly arranged on each scraper 310 and used to make the sludge tend to move closer to the middle of the isolation cylinder. The edge is in contact with the inner side wall of the isolation cylinder 30 provided with the water filter mesh 300. The upper and lower parts of the isolation cylinder 30 are respectively provided with a sludge inlet for feeding the sludge to be concentrated and a sludge outlet for discharging the concentrated sludge. A plurality of scrapers 310, a driving mechanism 35 and a flow guide element 33 form a concentration unit Q that is convenient for sludge concentration and prevents the filter mesh from being clogged. Q; extrusion zone J is provided with at least two sets of thickening units Q, in which multiple mud scrapers 310 of each adjacent two sets of thickening units Q are rotated in opposite directions to form a squeezing force, and the squeezed sludge is directed to the sludge outlet to be set.

Specifically, the isolation cylinder 30 is a square cylinder, and two opposite side walls of the isolation cylinder 30 are provided with filter meshes 300 for water supply to pass through. The water filter meshes 300 are distributed along the entire height of the isolation cylinder 30 or only along a section of the height of the isolation cylinder 30.

Further, the isolation cylinder 30 is set upright, and its upper and lower parts are respectively provided with a sludge inlet for feeding the sludge to be concentrated and a sludge outlet for discharging the concentrated sludge, and a mud outlet 34 is also provided at the corresponding mud outlet of the isolation cylinder 30, wherein the purpose of setting the mud outlet 34 is to control the amount of sludge discharged and the water content in the sludge.

On the water-permeable area T and the extruding area J of the isolation cylinder 30, there are respectively provided rotating shafts 32 that can rotate around their own axes and are arranged parallel to each other.

In this example, two sets of thickening units Q are arranged in the extruding area J, and the rotating directions of the two rotating shafts 32 are opposite to each other, and can guide the sludge to be extruded downward to the sludge outlet.

Further, the two rotating shafts 32 share a driving motor, and then through the transmission of the gears, they realize the opposite rotation in the direction of the arrow in FIG. 4 . As for the gear structure, it is a conventional design, and will not be described in detail here.

At the same time, the plurality of mud scrapers 310 of each adjacent two groups of thickening units Q are interlocked and arranged. It makes the sludge extruded stronger, thus improving the concentration effect.

The scraper 310 is fixed on the rotating shaft, and a plurality of scrapers constituting each scraper group 31 are evenly distributed along the radial direction of the rotating shaft 32 .

In this example, the rotating shaft 32 horizontally passes through the two opposite side walls of the isolation cylinder 30 having the water filter mesh 300. The distance between the two opposite side walls is c, and the reasonable value range of c is 120-300 cm. If the distance is greater than 300 cm, the concentration effect will be poor. If the distance c is less than 120 cm, the sludge treatment capacity of the isolation cylinder 30 will be too small.

In this example, there are one group and two groups of concentration units Q located in the permeable zone T and the extrusion zone J, respectively, and each group of concentration units Q has a scraper group 31, wherein the scraper 310 of each scraper group 31 is respectively in contact with two opposite side walls of the isolation cylinder 30 having a filter mesh 300. Specifically, one side of each mud scraper 310 extending along its own length direction is in close contact with the inner side wall of the isolation cylinder 30 provided with the water filter mesh 300, and an angle a is formed between the plane where the mud scraper 310 is located and the inner side wall of the isolation cylinder 30 in contact with the mud scraper 310.

The deflector element 33 includes a plurality of deflectors 330, which are fixedly arranged on each scraper 310 so that the sludge tends to move closer to the middle of the isolation cylinder 30. At the same time, the plurality of deflectors 330 are distributed along the length direction of the scraper 310 and two adjacent deflectors 330 are spaced apart. The plane on which each deflector 330 is located and the inner side wall of the isolation cylinder 30 that is in contact with the scraper 310 form an angle b. The selection of the angle b The range is 45° to 75°, specifically, for example, 50°, 60° and the like.

Further, the deflectors 330 on each scraper group 31 on both sides are staggered from each other; the distance between the end edge of the deflector 330 away from the scraper 310 and the inner side wall of the isolation cylinder 30 is d, and the reasonable range of d is 60-150 cm, preferably 60-120 cm.

The sludge dewatering device 2 includes a squeeze drum 20 located below the sludge outlet of the sludge thickening device and arranged horizontally, a drive mechanism 21 for driving the squeeze drum 20 to rotate around the horizontal axis, a squeeze area s with a sludge outlet is formed between the squeeze drum 20 and the sludge outlet, and a water filter hole or a water filter assembly is provided on the wall of the squeeze drum 20 for water to pass through. Rotate down to guide the sludge outlet, and the squeezed water is discharged from the water filter holes or water filter components on the wall of the extrusion drum 20 outside the extrusion area s.

In this example, the extrusion drum 20 has a single-layer or multi-layer structure, and a reinforcing plate extending along the length direction of the extrusion drum 20 is provided on the inner wall of the extrusion drum 20 . Ensure the rigidity and strength of the extrusion drum, and facilitate the extrusion and dehydration of sludge. At the same time, end caps are provided at both ends of the extrusion roller 20; through holes are opened on the end caps (to reduce the weight).

Specifically, a plurality of water filter holes are provided directly on the outer peripheral wall of the extrusion drum 20, and the shape of the water filter holes can be any shape, such as: elongated hole, square hole, round hole, etc. However, in this example, the water filter holes are elongated slit holes, which can effectively prevent the clogging of the slit holes by sludge and ensure the water filtration effect.

Further, the above-mentioned mud discharge damper 34 is located in the squeezing area s, and is pivotally arranged on one side of the mud outlet around a horizontal pivot.

The sludge dewatering device 2 also includes a scraper assembly 22 arranged on one side of the sludge outlet for scraping the sludge remaining on the surface of the extrusion drum 20 and discharging it from the sludge outlet, and a sealing plate assembly 23 for sealingly connecting the extrusion drum 20 with the other sides of the sludge outlet to prevent unextruded sludge from being discharged.

Further, the mud scraping assembly 22 includes an extension plate 220 extending obliquely downward and outward from one side of the mud outlet, and a scraper 221 extending vertically from the lower end of the extension plate 220 to the opposite side of the upper part of the extrusion drum 20 and contacting the surface of the extrusion drum 20, wherein the sludge outlet is located in the middle of the scraper 221, and the sludge outlet extends along the length direction of the extrusion drum 20.

Simultaneously, in this example, a guide trough 24 is also provided at the sludge outlet to facilitate the export of the sludge out of the treatment equipment, wherein the guide trough 24 includes a receiving base plate 240 whose upper end touches the outside of the scraper 221 and is positioned below the sludge outlet, side panels 241 positioned on both sides of the receiving base plate 240, and a connecting portion 242 for connecting the lower end of the receiving base plate 240 to the frame 1. The included angle between the receiving base plate 240 and the horizontal plane is 15 ~60°, of which 30° is the best (as shown in the embodiment of this example).

The sludge dewatering device 2 also includes a brush assembly 25 that is arranged on the frame 1 and can extend into the water filter assembly or the water filter hole to remove residual sludge, and a spray mechanism 26 for washing the brush assembly 25 and the water filter assembly or the water filter hole, wherein the spray mechanism 26 is located above the brush assembly 25.

The brush assembly 25 includes an installation shaft 250 arranged parallel to the extrusion roller, bristles 251 evenly distributed around the installation shaft along the length direction of the installation shaft 250, and a driving mechanism 252 for driving the installation shaft 250 to rotate around the axis, wherein the installation shaft 250 and the extrusion roller 20 rotate oppositely.

The spraying mechanism 26 is a conventional design, adopting a pipeline arranged parallel to the installation shaft 250, and a plurality of water spray holes are provided on the pipeline, and then high-pressure water is provided in the pipeline, thereby realizing the flushing of the water filter assembly or water filter holes, and the brush assembly 25.

In addition, a housing is installed on the frame 1, respectively hiding the sludge thickening device and the sludge dewatering device inside, and at the same time, there are drain pipes inside the housing to discharge the water discharged from the sludge thickening device and the sludge dewatering device to the outside of the housing respectively.

Working process of the present invention is as follows:

(1), concentrated

The flocculated sludge (sludge forms flocs to separate mud and water) is passed into the isolation cylinder from the mud inlet of the isolation cylinder, and the water is discharged from the isolation cylinder through the water filter mesh. After the sludge flocs settle, they are discharged from the outlet of the isolation cylinder. During the sludge concentration process, the rotation speed of the sludge scraper is controlled to be lower than the sinking speed of the sludge flocs in the isolation cylinder to ensure that the rotation of the sludge scraper will not bring up the concentrated sludge (sedimented sludge flocs). During the sludge concentration process, the isolation cylinder is fixed, and the driving mechanism drives the rotating shaft, mud scraper and deflector in the permeable area to rotate around the horizontal axis. During the rotation of the mud scraper, the sludge or other impurities adsorbed on the filter mesh are continuously scraped away to ensure the smooth flow of the filter mesh. When the group is guided, most of the water flows from the space between two adjacent deflectors to the water filter mesh and is discharged from it;

Then the sludge enters the extrusion zone, and the sludge is further squeezed by two rotating shafts moving in opposite directions, the mud scraper and the deflector, and the sludge is further squeezed, so that the remaining part of the water flows from the gap between the two adjacent deflectors to the water filter mesh and is discharged from it.

(2), dehydration

The concentrated sludge is conveyed from the mud outlet to the extrusion area under the extrusion and comb guidance of the extrusion area, and then the rotation of the extrusion drum further extrudes the sludge, and the amount of sludge is controlled through the mud outlet door. At the same time, the extruded sludge is discharged from the sludge outlet of the extrusion area, and the water generated by extrusion flows into the extrusion drum from the water filter holes on the surface of the extrusion drum, and then is discharged from the water filter holes on the wall of the extrusion drum outside the extrusion area, thereby achieving further dehydration.

In summary, the sludge thickening device of the present invention is very simple in structure and easy to set up. During the treatment process, the smooth flow of the filter mesh is ensured, and the water can be quickly discharged from the filter mesh. The concentration efficiency is high, the concentration effect is good, and the operation cost of the whole device is low. The efficiency can be increased to more than 20%, the operation is simple, the implementation is convenient, the cost is low, and it is easy to transport.

The present invention has been described in detail above, and its purpose is to allow those skilled in the art to understand and implement the content of the present invention, and cannot limit the protection scope of the present invention with this. All equivalent changes or modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims (10)

1. The sludge concentration and dehydration integrated machine comprises a frame, a sludge concentration device and a sludge dehydration device, wherein the sludge concentration device and the sludge dehydration device are arranged on the frame; the sludge concentration device comprises an isolation cylinder with water filtering meshes for water passing through, a plurality of scrapers capable of rotating together around a horizontal axis, a driving mechanism for driving the scrapers to rotate, and a flow guiding element fixedly arranged on each of the scrapers and used for enabling sludge to tend to approach the middle part of the isolation cylinder, wherein the scrapers form a scraper group, one edge of each scraper extending along the length direction of each scraper contacts with the inner side wall of the isolation cylinder, provided with the water filtering meshes, of each isolation cylinder, and the upper part and the lower part of each isolation cylinder are respectively provided with a sludge inlet for introducing sludge to be concentrated and a sludge outlet for discharging the concentrated sludge; the method is characterized in that: the sludge is concentrated conveniently, the filtering net holes are prevented from being blocked by the concentrating units formed by the plurality of sludge scrapers, the driving mechanism and the flow guiding element, the isolation cylinder is divided into a water permeable area and an extrusion area which are communicated from top to bottom, and a group of concentrating units are arranged in the water permeable area; the extrusion area is at least provided with two groups of concentration units, the plurality of scrapers of each two adjacent groups of concentration units oppositely rotate to form extrusion force, and extruded sludge is guided to the sludge outlet; the mud plates of every two adjacent groups of concentration units are meshed with each other, when the sludge concentration device works, the isolation cylinder is fixed, and the mud scraping plate rotates to scrape the mud at the water filtering net holes; the sludge dewatering device comprises an extrusion roller which is positioned below a sludge outlet of the sludge thickening device and is horizontally arranged, a driving mechanism which is used for driving the extrusion roller to rotate around a horizontal axis, an extrusion area with a sludge outlet is formed between the extrusion roller and the sludge outlet, a water filtering hole or a water filtering component through which water passes is formed in the wall of the extrusion roller, the water filtering hole is a long slit hole, when the extrusion roller rotates, sludge in the extrusion area is extruded, extruded sludge is guided to the sludge outlet under the rotation of the extrusion roller, and extruded water is discharged from the water filtering hole or the water filtering component on the wall of the extrusion roller outside the extrusion area.

2. The integrated sludge thickening and dewatering machine according to claim 1, wherein: the water permeable area and the extrusion area of the isolation cylinder are respectively provided with a rotating shaft which can rotate around the axis of the isolation cylinder and is arranged in parallel, the rotating shafts are connected with the driving mechanism or are integrally arranged, and the plurality of rotating shafts are arranged in the extrusion area side by side.

3. The sludge concentrating and dewatering integrated machine according to claim 2, wherein: the mud scraping plates are fixed on the rotating shaft, and a plurality of mud scraping plates forming each mud scraping plate group are uniformly distributed along the radial direction of the rotating shaft.

4. The integrated sludge thickening and dewatering machine according to claim 1, wherein: the sludge dewatering device also comprises a sludge scraping component which is arranged on one side of the sludge outlet and is used for scraping the sludge remained on the surface of the extrusion roller and discharging the sludge from the outlet, and a sealing plate component which is used for sealing and connecting the extrusion roller with other sides of the sludge outlet and preventing the sludge which is not extruded from being discharged, wherein the sludge outlet, the upper part of the extrusion roller, the sludge scraping component and the sealing plate component form an extrusion area, and the outlet is positioned on the sludge scraping component.

5. The integrated sludge thickening and dewatering machine according to claim 4, wherein: the mud scraping assembly comprises an extension plate which extends downwards and outwards obliquely from one side of the mud outlet, and a scraping plate which extends from the lower end of the extension plate to the opposite side of the upper part of the extrusion roller vertically and contacts with the surface of the extrusion roller, wherein the outlet is positioned in the middle of the scraping plate, and the outlet extends along the length direction of the extrusion roller.

6. The integrated sludge thickening and dewatering machine according to claim 5, wherein: the outlet is further provided with a guide trough which is convenient for guiding the sludge out of the integrated machine, wherein the guide trough comprises a bearing bottom plate, side coamings and a connecting part, the upper end part of the bearing bottom plate is propped against the outer side of the scraping plate and is positioned below the outlet, the side coamings are positioned on two sides of the bearing bottom plate, the connecting part is used for connecting the lower end part of the bearing bottom plate to the frame, and the included angle between the bearing bottom plate and the horizontal plane is 15-60 degrees.

7. The integrated sludge thickening and dewatering machine according to claim 1, wherein: the sludge dewatering device also comprises a brush component which is arranged on the frame and can extend into the water filtering component or the water filtering hole to remove residual sludge, and a spraying mechanism which is used for flushing the brush component and the water filtering component or the water filtering hole, wherein the spraying mechanism is positioned above the brush component, the brush component comprises an installation shaft which is arranged in parallel with the extrusion roller, bristles which are uniformly distributed around the installation shaft along the length direction of the installation shaft, and a driving mechanism which is used for driving the installation shaft to rotate around the axis, and the installation shaft and the extrusion roller rotate in opposite directions.

8. The integrated sludge thickening and dewatering machine according to claim 1, wherein: the isolation cylinder is a square cylinder, the bottom of the square cylinder is opened to form the mud outlet, and the extrusion roller is of a single-layer or multi-layer structure.

9. The integrated sludge thickening and dewatering machine according to claim 8, wherein: the extrusion roller extends along the length direction of the mud outlet, and a reinforcing plate is arranged in the extrusion roller.

10. The integrated sludge thickening and dewatering machine according to claim 1, wherein: the sludge concentration device also comprises a sludge outlet shutter which is arranged in the extrusion area and can be used for adjusting the sludge outlet amount in a pivot way around a horizontal arrangement, wherein the pivot is consistent with the extension direction of the extrusion roller and is positioned at one side of the sludge outlet.