106 results about "Sludge cake" patented technology

The invention discloses a pickling line wastewater treatment device and treatment method, and relates to the technical field of pickling line wastewater treatment. The pickling line wastewater treatment device comprises a water injection tank, a medicament storage tank system, an adjusting tank, a neutralization reaction tank, a coagulative precipitation tank, a sludge concentration tank, sludge dewatering equipment, a water collecting tank, a water purifying tank and a sludge storage bin which are communicated in sequence, the filter frame is located in the shell, and sludge enters the filter frame through the conveying pipeline; the rotating assembly is used for driving the filtering frame to rotate, so that the sludge is dehydrated under the action of centrifugal force; the extrusion filter plate is arranged on the inner side of the filter frame and is used for extruding the sludge. The extrusion filter plate capable of reciprocating is arranged in the rotatable filter frame, so that the dehydration efficiency and the solid content of a mud cake can be remarkably improved by utilizing the synergistic effect of dynamic centrifugal force and intermittent mechanical pressure.

The invention discloses a sludge dewatering flocculant and a preparation method and application thereof.The sludge dewatering flocculant is a natural polymer modified corn straw powder flocculant, natural corn straw is smashed into powder to serve as a base material, and cationic groups are carried by the base material through alkalization and graft copolymerization; and the cation group is quaternary ammonium group methyl. The modified corn straw powder flocculant is used for conditioning municipal sludge, is beneficial to flocculation and dehydration of the sludge, is extremely good in solubility, can be easily and fully dispersed in the sludge, is extremely small in addition amount, and has the characteristics of environment friendliness and high efficiency; the biomass fuel is prepared by modifying the corn straws, so that the biomass fuel also has the advantages of high calorific value similar to that of the corn straws and the like, and subsequent sludge incineration disposal is facilitated. Municipal sludge is conditioned through the modified corn straw powder flocculating agent and dehydrated, the water content of an obtained sludge cake can be as low as 65%, and the specific resistance SRF of the sludge can be as low as 6.25 * 10 <-12 > m.kg <-1 >.

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 relates to the technical field of sewage treatment, in particular to low-resistance energy-saving environment-friendly sewage treatment filter pressing equipment and a filter pressing method thereof.The low-resistance energy-saving environment-friendly sewage treatment filter pressing equipment comprises a fixing frame used for supporting the whole equipment; the supporting frame is supported through the fixing frame, the supporting frame is used for installing the stroke jolting assembly and the multiple filter pressing assemblies, the stroke jolting assembly is used for conducting reset jolting on the filter pressing assemblies, and the filter pressing assemblies are used for conducting filter pressing forming on sewage; the extrusion assembly is used for pushing the limiting assembly to extrude the plurality of filter pressing assemblies; and the limiting assembly is used for limiting sliding of the extrusion assembly. Extra acting force can be provided through the stroke bumping assembly and the vibration mechanism, it is guaranteed that mud cakes can well fall off under various conditions, mud cake residues are reduced, and normal operation of a mechanical structure is guaranteed.

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 discloses iron modified coconut shell biochar as well as a preparation method and application thereof, and relates to the technical field of sludge treatment. The method comprises the following steps: performing pyrolysis carbonization on coconut shell powder, cooling, and sequentially grinding, sieving, cleaning and drying to prepare original coconut shell biochar; soaking in a hydrochloric acid solution, stirring, cleaning and carrying out suction filtration to obtain a precipitate; and soaking in a ferric chloride solution, stirring, performing ultrasonic treatment, washing, performing suction filtration, drying and sieving to prepare the iron modified coconut shell biochar. The iron modified coconut shell biochar has a certain flocculation effect in the sludge conditioning process, the particle size of sludge flocs is increased, the compressibility of sludge can be improved, the permeability of sludge cakes can still be kept under large mechanical pressure, and the filter capacity of the sludge can be improved. The problem that an efficient sludge conditioner is lacked in the prior art is solved.

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 utility model discloses an assembly type cut-off water recovery remote control electric device, and relates to the technical field of dehydration auxiliary equipment, the assembly type cut-off water recovery remote control electric device comprises an installation body and an external controller, the opposite side walls of the installation body are respectively provided with a plurality of supporting frames, the installation frames are provided with a track, a chain wheel track and a water tank, a plurality of guide wheels are mounted in the rails, a mounting frame is mounted on the guide wheels together, a water intercepting plate is mounted in the mounting frame, a motor is mounted on the lower wall surface of the mounting frame, and a chain wheel assembly is mounted at the output end of the motor through a rotating shaft. In order to achieve the water intercepting and recycling effect and smooth flowing of sewage to the water tank, the water intercepting plate is arranged to be in a wave shape and is installed in a height difference mode, so that the flow speed of the sewage to the recycling water tank is smooth, the sewage is not prone to backflow and overflow, and convenience is brought to maintenance and cleaning of the water intercepting 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 utility model belongs to the technical field of sludge treatment equipment, and particularly relates to a double-ring chain scraper conveyor suitable for sheet-shaped dry sludge cakes, which comprises a machine body, two gears rotationally connected to two end parts of the machine body, and a scraper conveyor belt connected to the two ends of the machine body, the chain is arranged on the two gears in a matched mode; the scrapers are fixedly connected to the chain at equal intervals; and the material storage frame is located below the discharging port of the machine body, and a discharging component is installed on a supporting frame fixed to the top of the material storage frame. The double-row chain type mud cake conveyor and the double-chain type structure are arranged, the scrapers distributed at equal intervals are fixed to the two chains, and mud cakes are located between the two rows of scrapers in the using process, so that the mud cakes are better in stability and cannot fall off in the conveying process, meanwhile, the discharging component is arranged on one side of the machine body, and the conveying efficiency is improved. The mud cake can be looser, subsequent transportation is facilitated, and the problems that at the present stage, a device is poor in operation stability, prone to falling and the like are solved.

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 an iron electrode coupled anaerobic granular sludge membrane bioreactor, which comprises a reactor body, a granular sludge bed and a clarified liquid are sequentially arranged in the reactor body from bottom to top, an iron negative electrode and a metal mesh positive electrode are oppositely arranged in the clarified liquid, and a water outlet pipe is communicated with the side wall of the reactor body corresponding to the clarified liquid. 2+ , Fe 2+ has a strong flocculation effect, reduces the content of suspended sludge in the clarified liquid, the released divalent iron can connect various anions such as hydroxyl, acid radical, sulfate radical and phosphate radical ion to form large flocculation sludge, reduces soluble protein and polysaccharide and is converted into solidified extracellular polymer, reduces pore size blockage and reduces the formation of high-strength attached sludge cake layer, and therefore irreversible membrane pollution is reduced.

The invention discloses a sewage treatment method capable of reducing sludge production, which comprises the following steps: S1, sewage firstly enters an anaerobic hydrolysis reactor for hydrolytic acidification, and then the sewage enters an anaerobic sludge interception reactor; s2, carrying out nitrogen and phosphorus removal and organic matter degradation on the water treated in the step S1; s3, the water body subjected to biochemical treatment in the step S2 enters a secondary sedimentation tank, and solid-liquid separation is completed; s4, residual sludge discharged from the secondary sedimentation tank and the anaerobic sludge interception reactor is collected in a sludge tank and then enters a sludge concentration tank, and the water content of the sludge is reduced; s5, the concentrated sludge enters a special aerobic starvation reactor; s6, dehydrating equipment is used, and the treated mud cakes are made into dry and hard mud cakes. According to the method, the sludge yield is reduced from the source, and the potential pressure on the environment is fundamentally relieved; no harmful chemical agent is added in the process, so that secondary pollution is avoided; the reduced sludge is more stable, and favorable conditions are created for subsequent safe resource utilization.

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.

The utility model discloses a river bottom sludge dewatering device, and relates to the technical field of sludge dewatering, the river bottom sludge dewatering device comprises a treatment box, the inner wall of the treatment box is provided with a sludge cavity, the inner wall of the treatment box is provided with a clear water cavity, and the outer wall of the treatment box is fixedly connected with a vertical plate. When equipment needs to be used, sludge is discharged into material conveying pipes through a discharging hopper, then a motor is started, when the motor is started, a rotating shaft is driven to rotate, then a plurality of second material conveying pipes are driven to move, the sludge continuously moves forwards, and then the rotating shaft drives a plurality of connecting blocks at the same time to enable a fluted disc to move; when the fluted discs move, a plurality of fluted discs II are driven to start to move together, and then when a material conveying pipe II moves, sludge is separated into a plurality of material distributing pipes through a plurality of material distributing blocks, so that the sludge adhered to the interior of the water pressing barrel can be quickly cleaned, and the situation that a large number of sludge cakes are accumulated due to the fact that the sludge is stuck in the water pressing barrel for a long time is prevented.

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.