65 results about "Sludge cake" patented technology

The utility model discloses a sludge filter-pressing dehydration device, and relates to the technical field of sludge dehydration equipment. The sludge compressing and dewatering device comprises a homogenizing tank, a squeezing water tank, a blowback gas storage tank, a vacuum pump, a hot air unit and a double-diaphragm filter press, the homogenizing tank is connected with the double-diaphragm filter press through a filter press feeding pump, the squeezing water tank is connected with the double-diaphragm filter press through a squeezing pipeline, the double-diaphragm filter press is connected with a back flushing pipeline, a three-way pneumatic valve is arranged on the back flushing pipeline, a compressed air pipeline is arranged between a back flushing air storage tank and the three-way pneumatic valve, and the back flushing air storage tank is connected with the double-diaphragm filter press. The vacuum pump is connected with the double-diaphragm filter press through a vacuum pipeline, and the hot air unit is connected with the double-diaphragm filter press through a hot air outlet pipeline. According to the sludge filter-pressing dehydration device provided by the utility model, the hot air unit and the vacuum pump are arranged, and the moisture content of sludge is further reduced by virtue of contact between hot air and a filter-pressed sludge cake after filter pressing of the double-diaphragm filter press.

The invention provides sludge biochar as well as a preparation process and application thereof, and relates to the technical field of biochar materials. The invention relates to a preparation process of sludge biochar. The preparation process comprises the following steps: S1, conditioning sludge to obtain pretreated sludge; s2, dewatering the pretreated sludge to obtain sludge dewatered sludge cakes; s3, performing pyrolysis treatment on the sludge dewatered sludge cake to obtain the sludge biochar. The obtained sludge biochar is low in environmental risk and high in fertilizer efficiency.

The invention relates to a method for improving the dewatering performance of organic sludge by using a polyether demulsifier, and belongs to the technical field of municipal sludge treatment. The epoxyethane / epoxypropane block polyether is utilized to effectively destroy a stable oil-water emulsification system in the organic sludge, reduce interfacial tension and promote water release, and the dehydration performance of the organic sludge is remarkably improved by destroying an oil-water interfacial film structure. By utilizing the method disclosed by the invention, the dehydration efficiency of the organic sludge can be remarkably improved, the capillary water absorption time of the sludge and the specific resistance of the sludge are remarkably reduced, the Zeta potential of the sludge becomes closer to a positive value, the median particle size of the sludge is remarkably improved, and the water content of a sludge cake is greatly reduced; the method is easy and convenient to operate, existing dehydration equipment can be directly utilized, and extra investment is not needed; the adding proportion of the demulsifier can be optimized according to actual sludge characteristics, so that the medicament cost is saved; the method provided by the invention provides an economic and efficient technical scheme for organic sludge treatment and disposal, and sludge reduction and recycling can be promoted.

The invention provides a low-carbon dehydration treatment method for high-organic-matter sludge, and belongs to the technical field of sludge treatment. A low-carbon dehydration treatment method for high-organic-matter sludge comprises the following steps that food wastewater sludge is fed into a conditioning tank, a ferric chloride solution is added, the mass of FeCl3 accounts for 3.3%-7.0% of the mass of absolute dry sludge, and a mud cake is obtained after stirring, standing and filter pressing are conducted. According to the method, concentration is canceled, lime and PAM are not added, sludge self-flocculation is used in cooperation with low-dosage ferric chloride conditioning, the treatment time is shortened to 2.5 hours from 4 hours or above, the dosage of ferric chloride is reduced by about 50%, the efficiency is remarkably improved, the cost is reduced, and meanwhile the treatment cost is reduced. The problems that the pH value of a mud cake is too high, the calorific value is reduced, and the follow-up disposal approach is limited due to addition of lime are thoroughly avoided, and efficient, low-carbon and low-cost collaborative optimization of sludge dewatering and recycling is achieved.

The utility model discloses an electroplating sludge filter pressing and collecting device which comprises a filter pressing frame, a falling groove is formed in the bottom of the filter pressing frame, a hopper is arranged at the position, corresponding to the falling groove, of the bottom of the filter pressing frame, and a conveying belt is arranged at the position, under the hopper, of the bottom of the filter pressing frame. A lifting hook assembly is arranged at the position, located at the downwards-inclined end of the conveying belt, of the lower surface of the filter pressing frame, a lifting belt is connected to the lifting hook assembly in a hung mode, and a woven ton bag is arranged on the lifting belt. The lifting hook assembly, the lifting belt and the woven ton bag are arranged, a sludge cake falls onto the conveying belt through the falling groove, then the conveying belt conveys the sludge cake to the woven ton bag position and then the sludge cake falls onto the woven ton bag to be bagged, and after the woven ton bag is full, the woven ton bag is conveyed to a designated place through a forklift to be placed. Therefore, the sludge cake can be treated without waiting for the arrival of a loading and transporting vehicle, and the effect of pre-bagging the sludge cake by using the woven ton bag is achieved.

The utility model discloses a kind of pressure filters of quick vibration and knock unloading, including frame and magazine, the top of the frame is provided with magazine, the top of the magazine is provided with multiple filter plates, the outer wall of the magazine is symmetrically provided with first integrated frame, the inside of the first integrated frame is movably installed with first screw rod, the side wall of the first integrated frame is provided with second stepper motor, and the output end of second stepper motor is connected with first screw rod, the surface of the first screw rod is all equipped with first threaded sleeve, and first threaded sleeve is connected with first screw rod by screw thread, the top of the first threaded sleeve is all provided with integrated plate. The utility model not only realizes reciprocating vibration and knock to knock filter plate to make sludge cake and filter plate separate, facilitate to the movement vibration and knock of multiple filter plates in turn and to the cleaning and scraping cleaning of sludge, and improve the convenience of filter plate vibration and knock cleaning and the efficiency of cleaning sludge.

The utility model relates to the technical field of muddy water separation devices, in particular to a floating type muddy water separation device for discharging muddy water, which comprises a treatment tank and a mounting assembly, the mounting assembly comprises a transverse plate, a winding component, a filter cartridge, a floating plate, a mounting groove, a locking bolt, a connecting component, a communicating pipe, a water pump, a connecting plate and a limiting rod; a plurality of submersible stirrers are arranged at the bottom; after uniform mixing, the slurry is pumped into a filter press for dehydration; the dehydrated clear water is recycled; filter-pressed mud cakes are conveyed out and are changed along with the water level through a floating plate, the clear water on the upper layer is pumped by a water pump, and silt is filtered through a filter cartridge, so that the water pump is prevented from pumping out; the filter cartridge is fixed in the mounting groove through a locking bolt and is convenient to disassemble, the filter cartridge is connected with the communicating pipe through a connecting component, when the filter cartridge needs to be disassembled, the floating floating plate is lifted to a proper height through a winding component, and a limiting rod is used for limiting the sliding direction of the floating plate.

The present invention provides a method for preparing purified recycled terephthalic acid and purified recycled terephthalic acid obtained thereby, the method comprising the steps of: treating waste polyester with an alkylated aromatic compound, a polarity control compound, and a solid-phase alkaline catalyst to form a composition comprising a terephthalic acid metal salt; ultrasonically treating the composition comprising a terephthalic acid metal salt; filtering the ultrasonically treated composition comprising a terephthalic acid metal salt to obtain a sludge cake; adding purified water to the sludge cake to obtain a terephthalic acid metal salt from which impurities have been removed; and treating the terephthalic acid metal salt, from which impurities have been removed, with an acidic solution to precipitate terephthalic acid.

The application discloses a self-adaptive constant-speed discharging screw extruder, and belongs to the technical field of sludge treatment. The self-adaptive constant-speed discharging screw extruder comprises a driving mechanism and a mounting platform, the driving mechanism is connected with an extrusion screw through a transmission mechanism, a mixing chamber, a uniform chamber and an agglomeration chamber are arranged outside the extrusion screw, a liquid discharge assembly is mounted on the outer wall of the uniform chamber, two symmetrically-arranged supplementary pipes are arranged in the liquid discharge assembly, and filter covers are fixed to the inner walls of the upper and lower ends of the supplementary pipes. The self-adaptive constant-speed discharging screw extruder can actively remove the thin sludge mixture with low solid content above the meshing area through the arrangement of the supplementary pipes and the suction plate, the total amount of liquid needing to enter the high-pressure section is reduced, the load of the subsequent extrusion section is reduced, the extrusion of solid substances can be more focused, the solid content of the final sludge cake and the processing capacity of the equipment are improved, the upper free treatment agent liquid is selected before extrusion dewatering, the utilization rate of the treatment agent is improved, and the operation cost is reduced.

This invention discloses a system and method for continuous and efficient hydrolysis of municipal sludge. The system includes a sludge receiving and storage device, a slurry tank, a heat exchange device, a preheating tank, and a multi-stage hydrolysis flash evaporation unit connected in sequence, as well as a product collection unit. The multi-stage hydrolysis flash evaporation unit is connected to the heat exchange device, which is connected to the product collection unit via a condenser. The multi-stage hydrolysis flash evaporation unit includes a primary flash tank, a hydrolysis reactor, and a secondary flash tank connected in sequence. Both the primary and secondary flash tanks are connected to the steam inlet of the heat exchange device. Using this system to hydrolyze municipal sludge, the moisture content of the dewatered sludge cake reaches 17%, which is 43% lower than that of existing technologies. The COD value, ammonia nitrogen value, and total nitrogen value of the sludge hydrolysate are increased by an average of approximately 65% ​​compared to existing technologies. This system has a high degree of automation, good stability, and low operating costs, effectively improving the hydrolysis efficiency and degree of hydrolysis of municipal sludge.

This utility model discloses a sludge treatment device, including: a filter press; a locking ring is fixedly installed at one end of the filter press's thrust plate; a concentration tank is fixedly installed inside the locking ring; a sludge separation mechanism is connected to the lower surface of the concentration tank; the discharge end of the sludge separation mechanism is connected to the feed inlet of the filter press; and a compression mechanism is fixedly installed at the lower end of the filter press. The compression mechanism can receive the sludge cake produced after filtration and compress it into blocks. This application, through the design of the concentration tank and the sludge separation mechanism, allows for pre-separation of water in the concentration tank, enabling preliminary concentration of the sludge. This significantly reduces the processing volume and time of the subsequent filter press, improving overall processing efficiency. The secondary compression of the sludge cake significantly reduces the sludge volume, achieving a high degree of sludge reduction and lowering transportation costs and subsequent disposal difficulties.

The present application relates to the field of sludge treatment, in particular to an environment-friendly sludge treatment equipment. The equipment comprises a sludge suction pump and a dehydration mechanism connected with the sludge suction pump. The dehydration mechanism comprises a treatment box and a pipeline. A rotating screen cylinder is arranged in the pipeline. The dehydration mechanism further comprises a filter pressing assembly and a disturbance assembly arranged in the treatment box in sequence from top to bottom. A linkage is arranged between the filter pressing assembly and the disturbance assembly. A medicament nozzle for spraying a solidifying agent is arranged on the treatment box opposite to the disturbance assembly. A discharge passage is arranged on the treatment box below the disturbance assembly. The present application realizes efficient dehydration of sludge and formation of sludge cake through the synchronous operation of the conveying belt and the pressure belt and the pressure roller. The linkage drives the disturbance assembly to uniformly disturb the sludge cake, which improves the mixing effect of the solidifying agent, thereby completing the continuous operation of dehydration and stabilization treatment.

The invention relates to the field of sludge treatment, in particular to a negative pressure sludge discharger device which comprises a bottom plate, semicircular covers, a filter pressing mechanism, a discharging mechanism, a cutting mechanism, an overflow mechanism, a hydraulic pump and a conveying belt mechanism, the semicircular covers are symmetrically arranged at the top of the bottom plate, the two semicircular covers are connected through a hinge, and one semicircular cover is connected with the bottom plate and the filter pressing mechanism. Cascade precipitation and automatic scraping cleaning of fine particles in filtrate are achieved through the V-shaped grooves in the overflow plate, anti-blocking is conducted on the filter cloth through negative pressure formed by rapid rising of the filter pressing block, and when mud cakes are discharged, sealing and leakage prevention are achieved through the leakage-proof plate, and even discharging is achieved through the inclined face of the cutting plate and the cutting groove. Therefore, the technical problems of sealing failure and frequent maintenance caused by easy blockage of filter cloth, easy blockage of a filter screen and residual discharged materials of the existing equipment are effectively solved, and the operation continuity and the dehydration efficiency of the device are improved.

The application discloses a system and method for drying sludge in power plants by using exhaust steam waste heat, which comprises a constant-discharge expander, a sludge drying device, a sludge cake crusher, a condensate tank and a steam heat storage unit; the sludge cake crusher is connected with the sludge drying device, the sludge drying device is connected with the condensate tank, and the condensate tank is connected with the steam heat storage unit; the steam heat storage unit is internally filled with heat storage materials; the constant-discharge expander is connected with the steam heat storage unit, and the steam heat storage unit is connected with the sludge drying device; the sludge drying device comprises a shell, a sludge drying device cylinder is arranged in the shell, and a plurality of rotary drying cylinders are uniformly arranged in the sludge drying device cylinder. The application combines boiler constant-discharge exhaust steam recovery treatment and power plant sludge treatment and disposal technology, solves the problems of white feather caused by waste of power plant boiler constant-discharge exhaust steam and equipment corrosion caused by exhaust steam emission, realizes conversion of discontinuous exhaust steam in power plants into stable heat source utilization, and solves the problems of high treatment cost and limited treatment capacity of power plant sludge external transportation.

The utility model belongs to the technical field of equidistant stretching of a filter plate of a filter press for lime kiln desulfurization sludge, and discloses an equidistant stretching device of a filter plate of a filter press for lime kiln desulfurization sludge, which is characterized in that a sliding body is fixedly arranged in the middle of the front and rear side surfaces of a frame type filter plate; the thrust plate is fixedly arranged on the upper portion of the right inner side face of the support. The fixed body is fixedly arranged in the middle of the front and rear side surfaces of the thrust plate; the filtered water discharge pipes are fixedly arranged on the front side and the rear side of the bottom of the frame type filter plate, and the filtered water discharge pipes are communicated with the interior of the frame type filter plate; the lifting equidistant stretching mechanisms are fixedly arranged on the front side and the rear side of the support respectively, and the lifting equidistant stretching mechanisms achieve one-time stretching action on the frame type filter plate through lifting action. The utility model has the beneficial effects that under the lifting matching of the lifting equidistant stretching mechanism, the frame type filter plate can be stretched at one time, so that sludge cakes formed by filtering can be discharged at one time, and the discharging operation efficiency of the sludge filter cakes is improved.

This invention discloses a method for preparing ceramsite from municipal solid waste and industrial solid waste, and the ceramsite itself. The raw materials, by dry weight percentage, are: 30%–50% biogas residue, 10%–30% desulfurization ash, 15%–25% desilication sludge cake, and 15%–25% waste bleaching clay. This invention also provides a method for preparing ceramsite from municipal solid waste and industrial solid waste. By classifying municipal solid waste at the source, using biogas residue from fermentation as the main material, and co-processing desulfurization ash, desilication sludge cake, and waste bleaching clay, this method achieves multiple benefits, including waste-to-waste treatment, resource utilization, and safe disposal of hazardous waste, resulting in significant environmental, social, and economic benefits.

The invention discloses an organic-inorganic sintered fertilizer using sludge and biogas residue as main materials and a preparation method thereof, the preparation method comprises the following steps: (1) weighing calcium superphosphate and potassium chloride, and uniformly mixing to obtain an inorganic fertilizer; (2) weighing the sludge cake and the biogas residue, and uniformly mixing the sludge cake and the biogas residue to obtain a mixture A; uniformly mixing the mixture A with an inorganic fertilizer to obtain a mixture B; and (3) mixing the mixture B with calcium powder, extruding the mixture to prepare columnar particles, drying the columnar particles in a constant-temperature drying box, putting the columnar particles into a muffle furnace, carrying out oxygen-isolated pyrolysis at 400-450 DEG C for 60-70 minutes, and carrying out curing treatment to obtain the stable organic-inorganic sintered fertilizer. According to the organic-inorganic sintered fertilizer, the municipal sludge is used as a main raw material, the biogas residues are used as a mixed auxiliary material, the organic-inorganic sintered fertilizer is not subjected to a fermentation and decomposition step, and the organic-inorganic sintered fertilizer contains a large amount of cellulose materials, so that the organic-inorganic sintered fertilizer is beneficial to nutrient storage and retention, is also beneficial to improvement of soil physical properties and soil microflora, and can promote resource utilization.

The invention discloses a waste acid purification mud cake resourceful treatment system and process, and the waste acid purification mud cake resourceful treatment system comprises a material crushing system used for crushing waste acid purification mud cakes; the pulping system is used for mixing the crushed waste acid purification mud cake with liquid to prepare uniform slurry; the slurry adjusting system is connected with an outlet of the slurry making system and is used for receiving slurry and adding an adjusting agent to improve the physical and chemical properties of the slurry; the loose filtering system is connected with an outlet of the slurry adjusting system and is used for performing low-pressure filtering on the adjusted slurry to form loose accumulated sludge particles; the purifying and washing system is connected with an outlet of the loosening and filtering system and is used for washing the loosely accumulated sludge particles to remove chloride ions; the sludge solidifying and dewatering system is connected with an outlet of the purifying and washing system and is used for extruding, dewatering and forming the purified sludge to prepare iron-making raw material blocks; by means of the technological process, harmless treatment and resource recycling are achieved.

This invention belongs to the field of solid waste treatment and resource utilization technology, and discloses a surfactant elution and biochar synergistic electro-osmotic dewatering process for oily sludge and its application. Addressing the problems of high water content (>96%), strong insulation due to oil film coating, and difficulties in conventional dewatering of oily sludge, this invention adopts a coupled route of "liquid phase modification - mechanical pre-dewatering - electro-osmotic deep drying". First, surfactants are used to remove the oil film on the surface of sludge particles; then, biochar is added to construct a rigid conductive framework, and the water content is reduced to 80%~85% to form a sludge cake through flocculation and mechanical pressure filtration; finally, deep dewatering is carried out under the synergistic effect of electric field and mechanical pressure. This invention uses biochar to solve the problems of high resistance and high energy consumption of oily sludge, while combining Joule heating effect to assist in viscosity reduction. The water content of the treated sludge can be reduced to below 60%, and some oil is recovered during dewatering. It features high treatment efficiency, low energy consumption, long electrode life, and high resource utilization.

The invention discloses sludge biochar as well as a preparation method and application thereof, and belongs to the technical field of sludge resource utilization. According to the method, the excess sludge of a municipal sewage treatment plant is used as a raw material, efficient sludge dehydration is achieved through gravity concentration, ferric chloride-thiourea combined chemical conditioning and a filter pressing technology, obtained dehydrated sludge cakes are subjected to high-temperature pyrolysis in an inert atmosphere through a tubular furnace, and the sludge biochar material is prepared. The prepared sludge biochar is used for an advanced oxidation system activated by peroxymonosulfate so as to efficiently degrade organic pollutants. According to the method, the raw materials are easy to obtain, the process is simple and convenient, the sludge dewatering performance is remarkably improved, reduction, harmlessness and resource utilization of the sludge are achieved, environmental, social and economic benefits are considered, and a novel technical path is provided for collaborative treatment of the sludge.

The invention provides riverway dredged mud fine-grained soil and a preparation method thereof. The preparation method comprises the following steps: 1) weighing 600-900 parts by weight of riverway dredged mud cakes and 100-400 parts by weight of a treating agent; (2) uniformly mixing the materials through a mixer; and 3) sieving the mixed river dredged mud through a 20mm sieve to obtain fine-grained soil. The prepared fine-grained soil is low in water content and small in particle size, can be directly used for production of fluid soil and solidified soil, has the characteristics of rapid dispersion and convenient construction, and can reduce the content of organic matters in river mud, improve the compressive strength of the fluid soil / solidified soil and shorten the setting time. The large-scale application of the river dredging mud is facilitated.

The present application belongs to the technical field of sewage treatment, and discloses a method for improving the dewatering performance of residual sludge in a municipal sewage treatment plant; comprising the following steps: S1: collecting state parameters of sludge to be treated in real time. The present application sets an optimal conditioning time prediction model, ensures that the efficiency of the reagent is maximally exerted within the physical constraints, avoids waste of reagent consumption or insufficient conditioning, sets a dewatering machine operation parameter model to predict the optimal operation parameters of the dewatering machine in the dewatering stage, realizes the minimization of energy consumption under the satisfaction of process requirements, introduces a real-time fine-tuning mechanism in the execution process, compares the actual and expected dewatering rates, dynamically corrects the key parameters by using a rule algorithm, and re-estimates the dewatering time. Through accurate conditioning and parameter optimization, the average moisture content of the sludge cake can be reduced and stabilized at a lower level, the solid recovery rate is improved, the invalid operation of the reagent and equipment is avoided, the reagent consumption is expected to be reduced, and the dewatering energy consumption is saved.

The application provides a method for repairing mine wasteland by synergistically activating shield slurry and sludge by plants and microorganisms, injecting ozone into domestic sludge to obtain modified sludge, uniformly mixing the modified sludge, the shield slurry, biological bacterial fertilizer and arbuscular mycorrhizal preparation at a dry weight ratio of (4-5):(1-2):(0.2-0.3):(0.2-0.3) to obtain mixed slurry, performing pressure filtration dewatering treatment on the mixed slurry, and controlling the water content to be 30-50% to obtain mixed dry material, adding tailing sand and pioneer grass seeds to the mixed dry material, irrigating and cultivating at room temperature for 7 days to obtain mixed plant sludge cake, crushing the mixed plant sludge cake to obtain ecological restoration soil, adding ecological curing agent to the ecological restoration soil to obtain cured restoration soil, adding grass seeds to the cured restoration soil to obtain modified restoration soil, adding grass seeds to the ecological restoration soil after laying the ecological restoration soil on the flat section of the mine wasteland, spraying and sowing the modified restoration soil on the slope section of the mine wasteland, repairing the mine wasteland by the ecological restoration soil and the modified restoration soil, and realizing ecological environment restoration succession cycle.

The utility model relates to a kind of plate-frame sludge crushing treatment device, and the sludge treatment technical field belongs to, including crushing plate-frame, the main drive crushing tool holder of the crushing plate-frame inside being equipped with extending out the both ends of crushing plate-frame, the driven crushing tool holder of the main drive crushing tool holder side being equipped with with the staggered and one end extending out the crushing plate-frame of main drive crushing tool holder, the main drive crushing tool holder, the driven crushing tool holder side all be equipped with the transmission gear of the tooth profile meshing of each other.The main drive crushing tool holder includes driving shaft, the driven crushing tool holder includes driven shaft, the driving shaft, driven shaft all be equipped with several crushing blade that present the staggered distribution of each other.The characteristics of high crushing efficiency, stable structure, easy maintenance and strong applicability are provided.The dewatered sludge cake is crushed, the efficiency of subsequent treatment is improved, and the wear of conveying equipment is reduced.

The invention provides a river and lake sediment dehydration efficiency dynamic prediction and parameter self-adjustment method and system. The method comprises the following steps: step 1, collecting a training sample set; step 2, using an LSTM neural network to build a prediction model, using the sludge initial moisture content of the historical dehydration parameter data in the training sample set, the PAC dosage and the feeding pressure as input characteristics, and using the first standard reaching time when the sludge cake moisture content of the historical dehydration parameter data in the training sample set is less than or equal to a first threshold value as an output target, training an efficiency prediction model; and step 3, based on the efficiency prediction model, predicting second standard time according to the real-time dehydration parameter data, and if the second standard time is greater than a second threshold value, automatically adjusting the real-time dehydration parameter data through a gradient descent algorithm until the predicted new second standard time returns to the second threshold value. According to the river and lake sediment dehydration efficiency dynamic prediction and parameter self-adjustment method and system, manual intervention is not needed, and the dehydration standard reaching rate and stability are higher.

The invention belongs to the technical field of sewage treatment, and particularly relates to a sludge dewatering device for municipal waterworks, which comprises a plate-and-frame filter press, a storage box arranged at the bottom of the plate-and-frame filter press, and a movable filter plate mounted in the plate-and-frame filter press, the knocking mechanism comprises a first fixing plate and a second fixing plate which are fixedly mounted with the plate-and-frame filter press; through the designed structure, mud cakes on a filter plate in the plate-and-frame filter press can be quickly knocked and shaken off, so that the problems that a filter screen on the filter plate has fatigue cracks, fibers are broken, the precision of the filter plate is reduced and the like after long-time high-frequency shaking due to the fact that the filter plate of a traditional plate-and-frame filter press needs to be repeatedly shaken are solved. According to the plate-and-frame filter press, the normal working efficiency of the plate-and-frame filter press is not affected while mud cake falling is completed, and the service life of the filter plate and the filter screen is prolonged.

The present application relates to the field of sludge dewatering treatment, and particularly relates to a filter plate group and a sludge filter pressing method for realizing deep dewatering of sludge. The height of the sludge cavity of the filter plate group is 23-28 mm; filter screens are arranged between the box plate and the filter cloth and between the membrane plate and the filter cloth. The sectional area of the sludge distribution port is calculated according to the sludge flow and the flow rate of the sludge injection port; the quantitative sludge injection amount M required for the filter pressing sludge cake is calculated according to the incoming sludge moisture content, and the quantitative sludge injection is adopted. The support force of the filter screen effectively ensures the smoothness of the water conveying channel, and ensures that the filter liquid is quickly discharged after filter pressing; the sectional area of the sludge distribution port is calculated to ensure that the sludge is sprayed out of the sludge outlet port of the cloth clamp at a certain speed, rather than overflowing; the total sludge injection amount is quantitatively injected, the required sludge injection amount is calculated according to the sludge cake thickness and the change of the incoming sludge moisture content, and the problems of large sludge injection amount, long sludge injection time, thick sludge cake and high moisture content in the prior art are avoided.

This invention designs a method for rapid dewatering of high-moisture-content dredged sludge enhanced by flocculation combined with plate and frame filter press, comprising the following steps: Step S1, sending the sludge slurry to a sedimentation tank for slag removal; Step S2, the sludge after slag removal flows by gravity into a thickening tank; Step S3, pumping the sludge at the bottom of the thickening tank to a conditioning tank via a small cutter suction dredger; Step S4, adding a skeleton material to the sludge in the conditioning tank before it enters the plate and frame filter press; Step S5, conveying the sludge with the skeleton material to the plate and frame filter press for dewatering. This application provides a method for rapid dewatering of high-moisture-content dredged sludge enhanced by flocculation combined with plate and frame filter press, employing a process flow of environmentally friendly dredging + sedimentation tank + thickening tank + equalization tank + plate and frame filter press dewatering. The sludge dredged by the environmentally friendly cutter suction dredger undergoes sedimentation and impurity removal, sludge thickening, chemical conditioning, filter press dewatering, and sludge cake conveying, ultimately forming a sludge cake with low moisture content.

The present application discloses a sludge dewatering system based on spiral extrusion and multi-stage filtration, relates to the technical field of sewage treatment, collects the particle size distribution, extracellular polymer concentration and surface cohesion coefficient of sludge, calculates the plugging tendency index, constructs a filter channel induction parameter set, pre-expands and disturbs the sludge to form a filter channel microstructure, obtains a first stage of sludge cake and filtrate through spiral extrusion, sends the sludge cake into a multi-stage filtration system, dynamically switches the filter path based on the pressure difference and the cleanliness of the filtrate, obtains a second stage of sludge cake and filtrate, and according to the conditions, implements airflow backflushing or hot air surface drying and edge pressing treatment on the sludge cake, and outputs the final sludge cake; the method realizes efficient dewatering and intelligent control of high-viscosity and high-plugging-risk sludge, improves the system operation stability and sludge cake quality, and is suitable for deep dewatering treatment in complex sludge scenarios.

This invention discloses a device and method for the resource-based treatment of river and lake sediment, relating to the field of sludge treatment technology. The device includes a backflushing mechanism for cleaning filter plates. When cleaning the filter plates is required, hot air is supplied to the air supply pipe via an air supply mechanism. Under air pressure, the moving pipe moves away from the sealing column and comes into contact with the filter plates, causing elastic deformation and impact vibration. The hot air is also blown out through air holes, achieving both backflushing cleaning and heating of the sludge cake on the filter plates. This results in higher cleaning efficiency and better cleaning effect, while avoiding wear on the filter plate surface, improving dewatering efficiency and effectiveness, and ultimately enhancing the efficiency and effectiveness of river and lake sediment resource-based treatment.