CN110078351B

CN110078351B - Sewage and sludge treatment and recycling method

Info

Publication number: CN110078351B
Application number: CN201910466335.5A
Authority: CN
Inventors: 俞德清
Original assignee: Ruimei Intelligent Equipment Jiangsu Co Ltd
Current assignee: Ruimei Intelligent Equipment Jiangsu Co Ltd
Priority date: 2019-05-31
Filing date: 2019-05-31
Publication date: 2020-04-14
Anticipated expiration: 2039-05-31
Also published as: CN110078351A

Abstract

The invention relates to a sewage sludge treatment and recycling method, sewage containing sludge sequentially passes through a sludge inlet hopper, a counterweight sludge outlet plate, a sludge raking group, a sludge scraping plate and a flexible sludge paving plate to enter a dewatering component, two sections of filter belts are respectively driven by a driving roller and a driven roller to operate, the two sections of filter belts positioned in a frame are overlapped and compressed, and the sludge flowing through is extruded; two sections of filter belts outside the frame are separated between the driving roller and the driven roller to extrude the extruded sludge. The belt makes an S-shaped winding between a plurality of rolling rolls, and the sludge is sufficiently ground during this winding to ensure further dewatering. The water content of the mud cake finally extruded through the steps reaches the corresponding requirement. The method for treating the sewage and the sludge can efficiently compress and mill the sludge mainly containing inorganic matters such as the sludge in the sewage to finally form the sludge cake, the treated water quality is clear, the generated sludge cake contains rich nutrient elements, and the method can be used for irrigation and fertilization of dealers and has high utilization rate.

Description

Sewage and sludge treatment and recycling method

Technical Field

The invention relates to the technical field of sewage treatment, in particular to a sewage sludge treatment and recycling method.

Background

Water is a source of life, is a necessary condition for life existence and economic development, and also is an important part of human tissues. However, with the continuous development of heavy industry and chemical industry, the pollution of water resources is becoming serious. The sewage contains a large amount of elements such as nitrogen, phosphorus, potassium and the like, so that the eutrophication of organisms in the water is very easy, and more plants such as green algae and the like emerge in the water after the water grows so as to influence the water quality and the natural landscape. Meanwhile, oxygen in the water is consumed when organic matters in the sewage are decomposed by microorganisms, so that the life of aquatic organisms is influenced, and after dissolved oxygen in the water is exhausted, the organic matters are subjected to anaerobic decomposition to generate unpleasant gases such as hydrogen sulfide and mercaptan, so that the water quality is further deteriorated.

Therefore, water pollution treatment is imminent.

In the prior art, the sewage treatment is generally carried out by a physical deposition method and a chemical deposition method, wherein substances such as alum or activated carbon are utilized to adsorb and precipitate inorganic substances in water, and chemical elements are utilized to separate out floating ions in water. However, sediment and other substances deposited by the physical deposition method are only dispersedly deposited at the water bottom and are difficult to collect, which conflicts with the sustainable development of geography; meanwhile, substances precipitated by the chemical deposition method contain a large amount of acid radicals, and the pH value of water is influenced.

Disclosure of Invention

The purpose of the invention is as follows: provides a sewage sludge treatment and recycling method, which solves the problems in the prior art.

The technical scheme is as follows: a sewage sludge treatment and recycling method is characterized by comprising the following steps:

step S1, sludge pretreatment: introducing sewage containing a large amount of sludge into a sludge inlet hopper, and introducing the sewage into a sludge inlet plate through the sludge inlet hopper; sewage flows through the counterweight mud outlet plate, and sludge flowing out of the mud inlet hopper is flatly paved by the counterweight mud outlet plate; the sludge after being discharged from the sludge plate by the counterweight flows to the sludge raking group, and further flocculation reaction is carried out on the sludge which is not completely reacted due to uneven sludge mixing; the sludge after the sludge raking group flows to a sludge scraper, and the sludge scraper is used for scraping the sludge;

step S2, solid-liquid separation: the sludge after passing through the mud scraping plate flows into a flexible mud paving plate, and the mud feeding amount in the next step is controlled; the sludge enters a dewatering component and is further dewatered to form a sludge cake; the speed reducing motor for driving the dewatering component is started to preheat in the step S1, the speed reducing motor drives the driving roller to rotate, and the driving roller transmits power to the driven roller through a pair of synchronous gears to realize power synchronization; the driving roller and the driven roller respectively drive the two sections of filter belts to operate, and the two sections of filter belts positioned in the frame are overlapped and compressed to extrude sludge flowing through; two sections of filter belts positioned outside the frame are separated between the driving roller and the driven roller, and extruded sludge is extruded;

step S3, mud cake collection: the mud cakes extruded in the step S2 are grabbed by a mechanical arm, stacked by stacking equipment and finally packed and boxed by boxing equipment;

step S4, water quality detection: collecting and detecting the water treated in the step S2 through a collecting system, collecting the qualified water into a river channel, and entering the step S5 with the unqualified water;

step S5, recirculation: and repeating the steps S1 to S4, and performing circulation processing on the riverway needing to be processed.

In a further embodiment, a sewage sludge treatment and recycling method is based on the following structure and its connection relationship, including: a frame which is built by a plurality of steel materials, a mud inlet plate which is fixed on the frame, a mud inlet hopper which is fixed on the upper part of one side of the frame and is communicated with the mud inlet plate, a counterweight mud outlet plate which is movably arranged on one side of the mud inlet hopper, a mud rake group which is movably arranged on one side of the counterweight mud outlet plate, a mud scraper which is movably arranged on one side of the mud rake group, a flexible mud spreading plate which is rotatably arranged on one side of the mud scraper, and a dewatering roll which is rotatably arranged inside the frame and is positioned on one side of the mud scraper, a driving roller, a driven roller and a rolling roller which are arranged in the frame in a rotating way at preset positions, the automatic dewatering machine comprises a rack, a plurality of press rolls, a filter belt, a deviation correcting system and a speed reducing motor, wherein the press rolls are rotatably arranged outside the rack in preset positions, the filter belt is wound on the driving roll, the driven roll, the dewatering roll, the rolling roll and the press rolls in a preset mode, the deviation correcting system is fixed in the rack, and the speed reducing motor is connected with the dewatering assembly.

In a further embodiment, the sewage containing a large amount of sludge in the step S1 is introduced into a sludge inlet hopper through a 90-cube, 11KW sludge inlet pump.

In a further embodiment, the counterweight mud discharging plate can adjust the moment of the counterweight mud discharging plate to adjust the thickness of the mud.

In a further embodiment, the force of the counterweight type mud discharging plate is adjusted by increasing or decreasing the number of the counterweight blocks, and the moment of the counterweight type mud discharging plate is adjusted by adjusting the corresponding counterweight blocks to a preset scale; the attack angle between the counterweight type mud discharging plate and the mud is changed by adjusting the force and the moment.

In a further embodiment, in the step S1, the inclination angle of the coulter-type mud raking device is changed by pulling the adjusting handle, so that the mud at the lower part turns up and down while turning to both sides; and a preset radian is arranged on one side of the flexible mud paving plate, which is close to the dewatering roller, and the included angle of the flexible mud paving plate is changed to control the mud feeding amount of the flexible mud paving plate entering the dewatering roller.

In a further embodiment, a dewatering roll with a diameter of 1200mm and a wrap angle of 228 ° is used in step S2, and the filter belt is wound around a press roll at a plurality of predetermined positions outside the frame.

In a further embodiment, the step S2 further includes the following steps of:

step S201, in the whole working process of the step S2, a deviation rectifying system rectifies the filtering belt in real time;

s202, controlling the flow of the sludge by a flexible sludge paving plate and guiding the sludge into a dewatering roller, and carrying out primary rolling on the sludge between two sections of filter belts at the dewatering roller;

step S203, the sludge after the first rolling in step S202 continues to pass through a plurality of rolling rollers, the filter belt makes an S-shaped roundabout among the plurality of rolling rollers, and the sludge is fully ground and dehydrated in the roundabout rolling process.

In a further embodiment, the deviation correcting system adopts tensioning airbags to finely adjust the press roller, the tensioning airbags are installed on two sides of the frame and are arranged between the outer wall of the frame and the press roller, and the pressing force between the press roller and the filter belt is finely adjusted by utilizing the inflation and deflation of the tensioning airbags.

In a further embodiment, the diameters of the dewatering rollers and the rolling rollers are sequentially reduced from large to small, and sludge is subjected to primary dewatering at the dewatering rollers and then is finely ground by the rolling rollers sequentially reduced from large to small layer by layer.

Has the advantages that: the invention relates to a sewage sludge treatment and recycling method, sewage containing sludge sequentially passes through a sludge inlet hopper, a counterweight sludge outlet plate, a sludge raking group, a sludge scraping plate and a flexible sludge paving plate, then enters a dewatering assembly, two sections of filter belts are respectively driven by a driving roller and a driven roller to operate, the two sections of filter belts positioned in a frame are overlapped and compressed, and the sludge flowing through is extruded; two sections of filter belts outside the frame are separated between the driving roller and the driven roller to extrude the extruded sludge. The belt makes an S-shaped winding between a plurality of rolling rolls, and the sludge is sufficiently ground during this winding to ensure further dewatering. The water content of the mud cake finally extruded through the steps reaches the corresponding requirement. The method for treating the sewage and the sludge can efficiently compress and mill the sludge mainly containing inorganic matters such as the sludge in the sewage to finally form the sludge cake, the treated water quality is clear, the generated sludge cake contains rich nutrient elements, and the method can be used for irrigation and fertilization of dealers and has high utilization rate.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.

FIG. 1 is a process flow diagram of a sewage sludge treatment process according to an alternative embodiment of the present invention.

Fig. 2 is a schematic view of the overall working method of the present invention.

Fig. 3 is a schematic diagram of the specific working method in step S2 according to the present invention.

FIG. 4 is a schematic diagram of the structure and the connection relationship thereof according to the present invention.

The figures are numbered: the device comprises a frame 1, a mud inlet plate 2, a mud inlet hopper 3, a counterweight mud outlet plate 4, a mud raking group 5, a mud scraper 6, a flexible mud paving plate 7, a dewatering roller 8, a driving roller 9, a driven roller 10, a rolling roller 11, a compression roller 12, a filter belt 13, a deviation rectifying box 14, a deviation rectifying roller 15, a high-pressure flushing device 16 and a tensioning air bag 17.

Detailed Description

In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the invention.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships 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 construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

The invention discloses a sewage sludge treatment and recycling method, which is established on the following structure, as shown in figure 4: the device comprises a frame 1, a mud inlet plate 2, a mud inlet hopper 3, a counterweight mud outlet plate 4, a mud raking group 5, a mud scraper 6, a flexible mud paving plate 7, a dewatering roller 8, a driving roller 9, a driven roller 10, a rolling roller 11, a compression roller 12, a filter belt 13, a deviation rectifying system and a speed reducing motor. The rack 1 is constructed by a plurality of steel materials; the mud inlet plate 2 is fixed on the frame 1; the mud feeding hopper 3 is fixed at the upper part of one side of the rack 1 and is communicated with the mud feeding plate 2; the counterweight mud discharging plate 4 is movably arranged on one side of the mud feeding hopper 3; the mud raking group 5 is movably arranged on one side of the counterweight mud discharging plate 4; the mud scraping plate 6 is movably arranged on one side of the mud raking group 5; the flexible mud laying plate 7 is rotatably arranged on one side of the mud scraping plate 6; the dewatering roll 8 is rotatably arranged in the frame 1 and is positioned at one side of the mud scraper 6; the driving roller 9, the driven roller 10 and the rolling roller 11 are respectively arranged in the frame 1 in a rotating way at preset positions; the plurality of press rollers 12 are rotatably arranged outside the frame 1 at preset positions respectively; the filter belt 13 is respectively wound on the driving roller 9, the driven roller 10, the dewatering roller 8, the rolling roller 11 and the press roller 12 in a preset winding mode; the diameters from the dewatering roller 8 to the rolling roller 11 are sequentially reduced from large to small; the power of the driving roller 9 and the driven roller 10 is synchronous; the filter belt 13 comprises two sections, and the sections positioned in the frame 1 are overlapped and pressed; the deviation rectifying system is fixed in the frame 1. The frame 1 and the mud inlet plate 2 form a basic assembly of the invention, the mud inlet hopper 3, the counterweight mud outlet plate 4, the mud rake group 5, the mud scraper 6 and the flexible mud paving plate 7 form a mud outlet assembly of the invention, the dewatering roller 8, the driving roller 9, the driven roller 10, the rolling roller 11, the compression roller 12 and the filter belt 13 form a dewatering assembly of the invention, the deviation rectifying system forms a deviation rectifying assembly of the invention, and the speed reducing motor and the assembly matched with the speed reducing motor for transmission form a power assembly of the invention.

The counterweight mud discharging plate 4 comprises a counterweight lever, a counterweight block is sleeved on the counterweight lever, a chuck on the counterweight lever is clamped, and the flat bed plate is welded and fixed at one end of the counterweight lever. The balance weight lever is provided with preset scales, and the balance weight block is arranged on the chuck in a cushioning mode and is limited by the chuck. Spreading mud discharged from the hopper in a counterweight mode; the quantity of the balancing weights is adjusted to change force, different scales of the balancing weights are adjusted to change force arms, and the moment of the counterweight mud discharging plate 4 can be changed by combining the balancing weights and the force arms; the adjustment of silt thickness is realized according to the position on-the-spot adjustment of upper portion balancing weight. The mud raking group 5 comprises a plurality of coulter type mud raking devices which are arranged in a preset mode, and each coulter type mud raking device comprises a fixed seat fixed on the mud feeding plate 2 and a coulter rotatably arranged on the fixed seat. The fixed seats are correspondingly fixed on two sides of the mud inlet plate 2, rotating shafts are rotatably connected between every two corresponding fixed seats, the rotating shafts are arranged in parallel at intervals of a preset distance, and the coulters are fixed on the rotating shafts at intervals of a preset distance; and one end of the rotating shaft is respectively fixed with a chain wheel, the chain wheel close to one side of the counterweight mud discharging plate 4 is welded with an adjusting handle, and the plurality of chain wheels are connected and driven through chains. The coulter type mud raking device is used in the field of gravity dehydration, mud on the lower portion is turned up and down while being turned to two sides, the mud on the lower portion is close to the distance of the filter belt 13, moisture is removed relatively first, and meanwhile, the filter belt 13 is ensured to perform a flocculation reaction on the mud which is not uniform and can not be completely reacted. The flexible mud laying plate 7 is arranged above the dewatering roll 8, and one side of the flexible mud laying plate 7, which is close to the dewatering roll 8, is provided with a preset radian which is matched with the edge of the dewatering roll 8. The flexible mud paving plate 7 is used for avoiding the phenomena of unstable mud feeding amount in the mud belt filtering and dewatering process and uneven cloth distribution when mud enters between the two filter belts 13 in the mud raking process, and avoiding the phenomena of local extension and deviation of the filter belts 13 in the using process. The rolling rollers 11 are staggered in a predetermined manner in the frame 1; the driving roller 9 is positioned right above the driven roller 10; the output end of the speed reducing motor is connected with the driving roller 9 through a coupler, and synchronous gears which are in the same specification and meshed with each other are respectively arranged at one end of the driving roller 9 and one end of the driven roller 10. The power of the speed reducing motor is directly output to the driving roller 9, the driving roller 9 and the driven roller 10 are in transmission through a synchronous gear, the power of the driving roller 9 and the power of the driven roller 10 are completely synchronous, the driving roller 9 and the driven roller 10 respectively drive two sections of filter belts 13 to operate, the two sections of filter belts 13 in the frame 1 are overlapped and pressed, and the sludge flowing through is extruded; two sections of filter belts 13 outside the frame 1 are separated between the driving roller 9 and the driven roller 10 to extrude the extruded sludge. The high-pressure washing device 16 is installed at the lower end in the rack 1 and below the rolling roller 11, and the angle of the high-pressure washing device 16 is adjustable. The high-pressure flushing device 16 may be a high-pressure water gun, and the high-pressure water column jetted by the high-pressure water gun cleans the sludge on the surface of the filter belt 13. The deviation correcting system comprises tensioning airbags 17 which are arranged on two sides of the rack 1 and arranged between the outer wall of the rack 1 and the pressing roller 12, deviation correcting boxes 14 which are arranged at preset positions in the rack 1, and deviation correcting rollers 15 which are arranged in the deviation correcting boxes 14 in a rolling mode; the filter belt 13 is wound on the rectification roller 15. The air bag pressure fine adjustment deviation rectifying system is adopted, online deviation rectifying of the filter belt 13 in the using process is guaranteed, the phenomenon of large-amplitude deviation rectifying is avoided, and the phenomenon that the filter belt 13 is distorted and folded due to large-amplitude deviation rectifying is avoided. The invention flatly spreads the mud discharged from the hopper in a counterweight mode, and realizes the adjustment of the mud distribution thickness according to the position on-site adjustment of the upper counterweight block. The coulter type mud raking device is used for turning the mud at the lower part up and down while turning the mud to two sides, and simultaneously further carrying out flocculation reaction on the mud which is not uniform and can not be completely reacted, thereby ensuring the dehydration effect of the filter belt 13. The flexible mud paving plate 7 is used for solving the problems of instability of mud feeding amount in the mud belt filtering and dewatering process and non-uniform distribution when mud enters between the two filter belts 13 in the mud raking process, and meanwhile, the problem that the filter belts 13 are partially extended and deflected in the using process is solved. The power of the driving roller 9 and the driven roller 10 is synchronized through a group of synchronous gear wheels, and the synchronous operation of the two filter belts 13 is ensured. The air bag pressure fine adjustment deviation rectifying system is adopted, online deviation rectifying of the filter belt 13 in the using process is guaranteed, the phenomenon of large-amplitude deviation rectifying is avoided, and the problem that the filter belt 13 is greatly rectified to form distortion and folding is avoided.

On the premise of the mechanical structure, the invention discloses a sewage sludge treatment and recycling method, as shown in figure 1, and the detailed steps are shown in figures 2 and 3:

firstly, sewage containing sludge flows into the sludge inlet plate 2 from the sludge inlet hopper 3; then, the sewage passes through the counterweight sludge discharging plate 4, and the thickness of the sludge is adjusted by adjusting the number and scale positions of the counterweight blocks; the counterweight mud discharging plate 4 comprises a counterweight lever, a counterweight block, a chuck and a flat bed plate; the counterweight lever can rotate around a rotating shaft, the counterweight block is sleeved on the counterweight lever, and the chuck is clamped on the counterweight lever and used for clamping and limiting the counterweight block; the flat laying plate is welded and fixed at one end of the counterweight lever; the balance weight lever is provided with preset scales. The mud that comes out in with the hopper is tiled through the form of counter weight, realizes the adjustment to silt thickness according to the position on-the-spot adjustment of upper portion balancing weight. Then, the sludge after passing through the counterweight sludge discharge plate 4 flows to the sludge raking group 5, and the adjusting handle is pulled to change the inclination angle of the coulter type sludge raking device, so that the sludge at the lower part is turned up and down while turning to the two sides. Then, the sludge after passing through the raking group 5 flows to the scraper 6, and the scraper 6 scrapes the sludge. The sludge after passing through the mud scraper 6 flows into the flexible mud laying plate 7 to control the mud inlet amount entering the dewatering assembly. The flexible mud laying plate 7 is arranged above the dewatering roll 8, and one side of the flexible mud laying plate 7, which is close to the dewatering roll 8, is provided with a preset radian which is matched with the edge of the dewatering roll 8. The flexible mud paving plate 7 is used for avoiding the phenomena of unstable mud feeding amount in the mud belt filtering and dewatering process and uneven cloth distribution when mud enters between the two filter belts 13 in the mud raking process, and avoiding the phenomena of local extension and deviation of the filter belts 13 in the using process. Before sewage enters the mud discharging plate, the speed reducing motor is started to preheat, the speed reducing motor drives the driving roller 9 to rotate, and the driving roller 9 transmits power to the driven roller 10 through a pair of synchronous gears. At the moment, the power of the driving roller 9 and the driven roller 10 is completely synchronous, the driving roller 9 and the driven roller 10 respectively drive the two sections of filter belts 13 to operate, and the two sections of filter belts 13 positioned in the frame 1 are overlapped and compressed to extrude the sludge flowing through; two sections of filter belts 13 outside the frame 1 are separated between the driving roller 9 and the driven roller 10 to extrude the extruded sludge.

It is worth mentioning that the diameters of the dewatering rollers 8 to the rolling rollers 11 are sequentially reduced from large to small, sludge is firstly rolled between two sections of filter belts 13 at the dewatering rollers 8, the rolled sludge continuously passes through the rolling rollers 11, the filter belts 13 perform S-shaped roundabout among the rolling rollers 11, and the sludge is fully ground in the roundabout rolling process to ensure further dewatering; through multiple experiments and strict calculation, the S-shaped roundabout grinding mode can ensure that the dehydration rate of the sludge reaches the standard, and the water-containing filtration of the finally extruded mud cake reaches the standard, namely, is less than or equal to 60 percent. Grabbing the extruded mud cakes by a mechanical arm, stacking the mud cakes by stacking equipment, and finally packaging and boxing the mud cakes by boxing equipment; collecting and detecting the treated water through a collecting system, collecting the water qualified through detection into a river channel, and repeating the steps to recycle the water unqualified through detection.

It should be noted that the dewatering roll 8 is a large wrap angle low pressure dewatering roll 8, and due to the characteristics of sludge, that is, when the hydraulic load or solid content fluctuates, if the pressure is too large, the water cannot be filtered out from the two sides of the filter belt 13, the sludge will run out to the two ends. The large roll with 228 degrees of wrap angle and 1200mm diameter ensures that the belt has a low-pressure dewatering area of more than 2500mm, ensures that most of water is already dewatered when entering an S-shaped pressing zone, and avoids the phenomenon of mud leakage at two ends of the filter belt 13 under the condition of large pressure.

As noted above, while the present invention has been shown and described with reference to certain preferred embodiments, it is not to be construed as limited thereto. Various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A sewage and sludge treatment and recycling method is characterized in that,

the method comprises the following steps:

step S2, solid-liquid separation: the sludge after passing through the mud scraping plate flows into a flexible mud paving plate, and the mud feeding amount in the next step is controlled; the dewatering assembly is composed of a dewatering roller, a driving roller, a driven roller, a rolling roller, a compression roller and a filter belt, wherein the driving roller, the driven roller and the rolling roller are respectively rotatably arranged in the frame at preset positions; the driving roller is positioned right above the driven roller; the output end of the speed reducing motor is connected with the driving roller through a coupler, and one end of the driving roller and one end of the driven roller are respectively provided with synchronous gears which have the same specification and are meshed with each other; the plurality of press rollers are rotatably arranged outside the frame at preset positions respectively; the filter belt is respectively wound on the driving roller, the driven roller, the dewatering roller, the rolling roller and the press roller in a preset winding mode; the diameters from the dewatering roller to the rolling roller are sequentially reduced; the power of the driving roller and the driven roller is synchronous; the filter belt comprises two sections, and the sections positioned in the frame are overlapped and compressed; the sludge enters the dewatering component and is further dewatered to form a sludge cake; the speed reducing motor for driving the dewatering component is started to preheat in the step S1, the speed reducing motor drives the driving roller to rotate, and the driving roller transmits power to the driven roller through a pair of synchronous gears to realize power synchronization; the driving roller and the driven roller respectively drive the two sections of filter belts to operate, and the two sections of filter belts positioned in the frame are overlapped and compressed to extrude sludge flowing through; two sections of filter belts positioned outside the frame are separated between the driving roller and the driven roller, and extruded sludge is extruded;

step S5, recirculation: repeating the steps S1 to S4, and circularly processing the river channel needing to be processed;

in the step S2, a dewatering roll with a diameter of 1200mm and a wrap angle of 228 ° is adopted, and the filter belt is wound on a plurality of press rolls at predetermined positions outside the frame; in the whole working process of the step S2, the correction system corrects the filter belt in real time; the sludge is guided into the dewatering roller by controlling the flow rate of the flexible sludge paving plate, and the sludge is firstly rolled between two sections of filter belts at the dewatering roller; the sludge after the primary rolling continues to pass through a plurality of rolling rollers, the filter belt makes an S-shaped roundabout among the plurality of rolling rollers, and the sludge is fully ground and dehydrated in the roundabout rolling process;

the deviation correcting system adopts tensioning airbags to finely adjust the press roller, the tensioning airbags are installed on two sides of the rack and are arranged between the outer wall of the rack and the press roller, and the pressing force between the press roller and the filter belt is finely adjusted by utilizing the inflation and deflation of the tensioning airbags;

the sewage sludge treatment and recycling method is based on the following equipment:

comprises a frame which is built by a plurality of steel materials, a mud inlet plate which is fixed on the frame, a mud hopper which is arranged on the upper part of one side of the frame and is communicated with the mud inlet plate, a counterweight mud outlet plate which is arranged on one side of the mud hopper, a mud rake group which is arranged on one side of the mud outlet plate by the counterweight, a mud scraper which is arranged on one side of the mud rake group by the counterweight, a flexible mud paving plate which is arranged on one side of the mud scraper, a dewatering roll which is arranged inside the frame and is positioned on one side of the flexible mud paving plate, a driving roll, a driven roll and a rolling roll which are arranged inside the frame by rotating at preset positions, a plurality of compression rolls which are arranged outside the frame by rotating at preset positions, a filter belt which is arranged on the driving roll, the driven roll, the dewatering roll, the rolling roll and the compression rolls by a preset mode, and a deviation rectifying system which is fixed in the, and a reduction motor connected with the dewatering component;

a high-pressure flushing device is arranged at the lower end of the inside of the rack and below the rolling roller, and the angle of the high-pressure flushing device is adjustable;

the high-pressure flushing device is a high-pressure water gun, and high-pressure water columns sprayed by the high-pressure water gun clean sludge on the surface of the filter belt;

a preset radian is arranged on one side, close to the dewatering roll, of the flexible mud laying plate, and the radian is matched with the edge of the dewatering roll so as to change the included angle of the flexible mud laying plate and control the mud feeding amount of the flexible mud laying plate entering the dewatering roll;

the mud raking group comprises a plurality of coulter type mud raking devices which are arranged in a preset mode, wherein each coulter type mud raking device comprises a fixed seat fixed on the mud feeding plate and a coulter rotatably arranged on the fixed seat; the fixed seats are correspondingly fixed on two sides of the mud inlet plate, rotating shafts are rotatably connected between every two corresponding fixed seats, the rotating shafts are arranged in parallel at intervals, and the coulters are fixed on the rotating shafts at intervals; the one end of pivot is fixed with the sprocket respectively, is close to the sprocket welding of counter weight mud discharging plate one side has adjustment handle, connects the transmission through the chain between a plurality of sprockets.

2. The sewage sludge treatment and recycling method of claim 1, wherein: and in the step S1, the sewage containing a large amount of sludge is introduced into a sludge inlet hopper through a 90-cube 11KW sludge inlet pump.

3. The sewage sludge treatment and recycling method of claim 1, wherein: the counterweight sludge discharging plate adjusts the moment of the counterweight sludge discharging plate and adjusts the thickness of sludge.

4. A sewage sludge treatment and recycling method according to claim 3, wherein: the force of the counterweight mud discharging plate is adjusted by increasing or decreasing the number of the counterweight blocks, and the moment of the counterweight mud discharging plate is adjusted by adjusting the corresponding counterweight blocks to a preset scale; the attack angle between the counterweight mud discharging plate and the mud is changed by adjusting the force and the moment.

5. The sewage sludge treatment and recycling method of claim 1, wherein: in the step S1, the inclination angle of the coulter-type mud raking device is changed by pulling the adjusting handle, so that the mud at the lower part turns over to both sides and simultaneously turns over up and down.

6. The sewage sludge treatment and recycling method of claim 1, wherein: the diameters from the dewatering rollers to the rolling rollers are sequentially reduced, and sludge is primarily dewatered at the dewatering rollers and then finely ground by the rolling rollers sequentially reduced from large to small layer by layer.