226results about "Fixation/solidifcation sludge treatment" patented technology

The invention discloses a mixing and feeding electric control system with a liquid level sensing function, and relates to the field of control systems. An adaptive parameter configuration module; a multi-stage gradient stirring module; a real-time data twinning processing module; a remote cooperative monitoring module; a fault linkage processing module; and an energy-saving closed-loop control module. According to the system, the material characteristic pre-detection module is combined with the water content-viscosity-medicament dosage three-dimensional mapping table and the viscosity-rotating speed mapping table, so that real-time scanning and parameter quantitative matching of the granularity, the water content and the viscosity of the industrial waste are realized; according to the scheme, the stirring sufficiency of the high-viscosity industrial sludge is improved, the energy consumption of the low-viscosity material is reduced, the dosage of the medicament is automatically matched according to the three-dimensional mapping table, the utilization rate of the curing agent is improved, and the core problems of stirring waste and insufficient stirring are fundamentally solved.

The invention belongs to the field of lake ecological desilting, and discloses a shallow lake bottom mud ecological desilting and residual water treatment combined treatment method which comprises lake bottom mud ecological desilting, solidification dehydration treatment and residual water treatment. Ecological dredging of the lake bottom mud is implemented by adopting an environment-friendly cutter suction dredger and a sealed pipeline to convey mud, and the bottom mud is conveyed to a mud discharge field to be solidified and dehydrated. A vacuum preloading technology is adopted for solidification and dehydration of the bottom mud, pore water of the bottom mud is effectively discharged by increasing the pressure difference between soil bodies of a drainage plate, and the overall solidification effect is improved. The residual water treatment comprises the treatment of desilting and solidifying residual water, the technologies of multi-stage precipitation, mechanical aeration, aquatic plant remediation and the like are adopted, and the residual water is discharged nearby after being treated to reach the standard. The combined treatment method aims at effectively reducing endogenous pollution of lakes, promoting lake water quality improvement and guaranteeing water safety of regional lakes and reservoirs, and is particularly suitable for ecological dredging engineering of shallow lakes, short construction period and fine-particle bottom mud.

The invention discloses a printing and dyeing wastewater advanced treatment and salt control recycling process and system, and belongs to the technical field of wastewater treatment. According to the process, the printing and dyeing wastewater is sequentially subjected to pretreatment of grating interception, adjustment and homogenization, and coagulating sedimentation; carrying out hydrolytic acidification and biochemical treatment in a membrane bioreactor; softening treatment of ozone oxidation complex breaking and fluidization crystallization softening; carrying out nanofiltration separation to obtain a permeate and a concentrated solution; carrying out seed crystal fluidization descaling on the concentrated solution; respectively carrying out membrane concentration on the nanofiltration permeate and the descaled concentrated solution through reverse osmosis to obtain sodium chloride and sodium sulfate concentrated solutions; and finally, carrying out evaporation curing treatment on the sludge and the crystallized waste residues. Through multi-step cooperative treatment, deep purification of the printing and dyeing wastewater and efficient separation and recycling of salt are realized, and the problems of impure nanofiltration salt separation and high system scaling risk in the prior art are solved.

The invention discloses high-fluidity under-sea non-dispersible high-performance solidified sludge soil and a preparation method thereof, and belongs to the technical field of ocean engineering seabed leveling, repairing and scour prevention. Setting of a curing agent, a coupling agent and a flocculating agent is determined according to different mineral compositions of the sludge. The chitosan quaternary ammonium salt can be used after being prepared into a solution by adding deionized water, and in order to ensure that the chitosan quaternary ammonium salt is fully dissolved, when the chitosan quaternary ammonium salt solution is prepared, the ratio of the chitosan quaternary ammonium salt to the deionized water is not greater than 1: 3. According to the solidified sludge soil and the preparation method thereof, the underwater non-dispersing performance of the solidified sludge soil in a marine environment is remarkably improved by setting the curing agent, the coupling agent and the flocculating agent according to mineral components of the sludge soil on an engineering site, and meanwhile, the flowing performance of the solidified sludge soil is reserved to meet construction requirements. Various mechanical properties of the solidified silt soil are effectively improved, and the solidified silt soil has good compression resistance and bonding performance and has guiding significance in the technical field of ocean engineering seabed leveling, repairing and scouring resistance.

The invention discloses a sludge treatment method and system, and relates to the field of solid waste treatment, and the method specifically comprises the following operation steps: S1, multi-frequency resonance pretreatment: destroying a sludge colloid structure through stepped mechanical vibration: collapsing an extracellular polymer network at a low frequency, breaking down microbial cell walls at an intermediate frequency to release intracellular water, pathogenic bacteria are inactivated through a high-frequency cavitation effect; s2, performing electrochemical in-situ flocculation; s3, gradient pressure dehydration; s4, low-temperature mineralization stabilization; and S5, vacuum condensation and recovery. According to the sludge treatment method and system, through stepped low-frequency, medium-frequency and high-frequency mechanical resonance, the colloid structure of the sludge can be directionally damaged, the fluidity of the sludge is remarkably improved, chemical conditioners are remarkably reduced, agent residues and secondary pollution are avoided, pathogens are physically inactivated through the high-frequency cavitation effect, and the treatment effect of the sludge is improved. Micro-nano oxygen bubbles are synchronously generated to strengthen free radical oxidation, and a sterile environment is created for subsequent mineralization.

The invention provides an in-situ curing and repairing method for heavy metals in river sediment. The in-situ curing and repairing method comprises the following steps: S1, detecting the content and physicochemical properties of the heavy metals in the river sediment; s2, designing a repair material formula; s3, preparing and putting a repairing material; s4, mixing and stirring the bottom mud and the repairing material; s5, monitoring and evaluating the repairing effect; and S6, repairing effect feedback and adjustment. According to the method, multiple linear regression, curved surface fitting, self-organizing mapping and mixed density network algorithms are fused, the sediment heavy metal content and physicochemical property data are fully utilized, a repair material formula can be accurately designed, and compared with a traditional single algorithm or empirical formula design, the repair material proportion can better fit the actual pollution condition, and the repair efficiency is improved. The utilization rate of repair materials is improved.

The invention discloses hazardous waste-containing sludge solidification mixing equipment which comprises a stirring box and two stirring shafts located in the stirring box, and a first stirring blade, a second stirring blade, a third stirring blade and a fourth stirring blade are rotationally connected to rotating cylinders of the stirring shafts respectively; a first adjusting rod, a second adjusting rod, a third adjusting rod and a fourth adjusting rod which are coaxial are arranged in the rotating cylinder, the first stirring blade is connected with the first adjusting rod through a first connecting structure, the second stirring blade is connected with the second adjusting rod through a second connecting structure, and the third stirring blade is connected with the third adjusting rod through a third connecting structure. The fourth stirring blade is connected with a fourth adjusting rod through a fourth connecting structure, the angle change of the stirring blade can be formed by moving the adjusting rod, the angle of the stirring blade on the stirring shaft of the sludge solidification mixing equipment can be adjusted, so that different stirring modes are formed, and the stirring requirements of different sludge-solidification agent systems are met.

The invention provides a biochar repairing agent for marine sediments and a preparation method of the biochar repairing agent, and belongs to the technical field of repairing agents. The preparation method comprises the following steps: carbonizing straws, modifying by phosphoric acid and concentrated nitric acid, depositing ferroferric oxide-titanium dioxide, loading UiO-66-(COOH) 2 on the surface, coupling cyclodextrin-MOF and chitosan, crosslinking, performing magnet separation, washing and drying to obtain the biochar repairing agent for the marine sediments. The biochar repairing agent for the marine sediments prepared by the invention has a relatively large specific surface area and a plurality of coordination groups, can better fix heavy metal ions in the marine sediments, also has a photocatalytic degradation effect on organic pollutants, and is good in mechanical strength, easy to store and transport, safe, environment-friendly and easy to separate; wide application prospects are realized.

The invention discloses a sludge composite curing agent and application thereof in sludge curing, carbon sequestration and emission reduction, and belongs to the technical field of sludge curing. The sludge composite curing agent comprises the following components in percentage by mass: 40-60% of slag, 20-40% of carbide slag and 10-20% of biochar. The curing agent can realize curing of sludge and improve mechanical properties (such as compressive strength and the like) of the cured sludge, and in addition, the prepared cured sludge has a relatively good absorption effect on CO2, can reduce emission of greenhouse gases, and has a good promotion effect on carbon sequestration and emission reduction.

The present invention relates to a material for solidifying high-organic sludge and a solidification method thereof. The material comprises the following raw materials, measured by weight: 0.5 to 1.5 parts of an oxidant, 1.5 to 3 parts of a sacrificial agent, 0.5 to 2 parts of a reinforcing agent, and 8 to 22 parts of a cementitious material. During the specific solidification process, the oxidant and the sacrificial agent are first added to the sludge and mixed. After standing and conditioning, the supernatant on the surface of the sludge is discharged; then, the reinforcing agent and the curing agent are added to the precipitate, mixed evenly, and then allowed to stand and cured to complete the solidification process. The material and method provided by the present invention utilize bulk solid waste as the solidification material, are low in cost, can be targeted to solidify high-organic sludge, have strong solidification workability, and achieve efficient, economical, and environmentally friendly solidification of the sludge. After solidification, the bearing capacity of the soil foundation can meet the requirements of relevant construction foundations.

The invention belongs to the technical field of river and lake water ecological restoration, and particularly discloses equipment and a method suitable for river and lake endogenous polluted sediment treatment, the equipment suitable for river and lake endogenous polluted sediment treatment comprises a material stirring unit and a curing granulation unit, the material stirring unit comprises a horizontal stirring machine box and is used for stirring and mixing raw materials, and the curing granulation unit is used for curing and granulating the raw materials; one side of the horizontal stirring machine box is connected with a loess spiral feeder, a bottom mud spiral feeder and a curing agent spiral feeder, and a loess crusher is connected between the loess spiral feeder and the horizontal stirring machine box. According to the method, the polluted bottom mud is efficiently converted into the ecological restoration matrix which is resistant to water flow scouring and stable in physical structure through a curing granulation process, the matrix can be directly applied to an underwater environment, and the core problem that existing ecological planting soil prepared through bottom mud recycling cannot be stabilized in a water area is solved; and a key matrix material is provided for in-situ construction of an underwater ecological system such as an underwater forest.

The invention relates to the technical field of river sludge solidification, in particular to a river dredging sludge solidification treatment device which comprises a box body, a sludge pipe is fixedly installed on the box body, a mixing assembly is fixedly installed at the end, located in the box body, of the sludge pipe, a solidification assembly is fixedly installed on the box body, and the solidification assembly is located below the mixing assembly; external lime powder enters the lime pipe in an air blowing mode, sequentially passes through the air shell and the particle pipe and enters the uniform distribution pipe, the lime powder is sprayed to the bottom of the mixing tank through the powder nozzles on the surface of the uniform distribution pipe to complete distribution of the lime powder, and then the output end of the distribution motor drives the crankshaft to rotate. The sliding rod drives the abutting plate to move downwards, the abutting plate drives the soft rubber sealing plug to move downwards, the soft rubber sealing plug is separated from the inner wall of the mixing tank, sludge flows in along the inner wall of the mixing tank and makes contact with lime powder at the bottom to be fused, the water content of the sludge is reduced, the sludge is pretreated, and the subsequent chemical curing effect is improved.

The application relates to the technical field of sludge treatment, and discloses a sludge soil solidification and ecological improvement solidification device which comprises a device shell and a collecting box, a movable blocking plate is slidably connected in the device shell, and a stirring barrel is attached to the top of the movable blocking plate. The sludge soil solidification and ecological improvement solidification device and the operation method thereof effectively solve the problem that, in actual use, the device adopts a sludge extrusion mode for sludge dewatering, part of the sludge overflows from the extrusion equipment during the extrusion process, the device cannot effectively dewater the sludge, and the dewatering efficiency of the device is low. In the whole operation process, the sludge in the barrel is clamped and heated to accelerate the dewatering speed of the sludge, the sludge in the device can be effectively prevented from overflowing, the dewatering efficiency of the device for the sludge can be greatly improved, and therefore the working efficiency of the device is greatly improved.

The invention discloses a sludge synergistic curing agent based on microbial mineralization and nano-compounding and a preparation method thereof. The sludge synergistic curing agent is prepared from the following components in percentage by mass: 20%-30% of fly ash, 15%-20% of sulphoaluminate cement, 10%-15% of modified phosphogypsum powder, 15%-20% of charcoal loaded nano iron, 5%-10% of attapulgite, 6%-10% of polyaspartic acid-co-acrylamide, 4%-5% of sodium carboxymethyl cellulose, 3%-5% of silica fume, 1%-3% of magnesium carbonate and 1%-2% of tartaric acid. The sludge synergistic curing agent is used for innocent treatment of river dredging sludge and industrial sludge, and rapid dehydration and high-strength curing of sludge and long-acting stabilization of pollutants are realized through synergism of the adsorption performance of the biochar, the reduction stabilization effect of the nano-iron and the cementation effect of a composite gel system.

The invention belongs to the technical field of wastewater treatment, and particularly relates to a method and system for removing heavy metals in wastewater, and the system comprises a collecting tank, a regulating tank, a Fenton-ultrasonic synergistic reaction tank, an addition and reduction sedimentation tank, a flocculation tank, a first sedimentation tank, a three-cavity nickel removal tank, a second sedimentation tank, a multi-parameter monitoring tank, an A / O tank, a third sedimentation tank and a clean water tank which are communicated in sequence. Discharging the adjusted wastewater containing the heavy metals into a Fenton-ultrasonic synergistic reaction tank to realize complex breaking of the complex-state heavy metals; adjusting the wastewater subjected to complex breaking treatment to be neutral, so that heavy metals are converted into hydroxide precipitates, and most of the heavy metals are removed at the stage; discharging the treated water into a flocculation tank, standing and precipitating, and enabling supernate to enter a nickel removal tank; and an organic sulfur catching agent is added into the nickel removal tank to strengthen chelation reaction, so that the nickel content is less than 0.1 ppm. According to the system, through four-stage cooperation of oxidation, precipitation, dynamic capture and intelligent feedback, the complex nickel removal problem is solved, and the comprehensive heavy metal removal rate is larger than or equal to 99.5%.

The invention discloses a drilling fluid waste liquid continuous purification treatment device which comprises a drilling cutting screening mechanism with a first solid material discharge port, a second solid material discharge port and a liquid discharge port, the inlet end of a drilling cutting discharge component is communicated with the first solid material discharge port, the inlet end of an extrusion type dehydration mechanism is communicated with the second solid material discharge port, and the outlet end of the extrusion type dehydration mechanism is communicated with the liquid discharge port. The inlet end of the multi-stage drawer type purification mechanism is communicated with the liquid outlet, and an adjustable material stirring mechanism is arranged at the inlet end of the drilling cutting screening mechanism. According to the invention, the investment cost of equipment can be effectively reduced, the convenience of transportation, transfer, installation, maintenance and the like is improved, solids and harmful substances in waste liquid can be removed step by step, so that the whole purification treatment process is in a continuous state, the purification treatment efficiency is improved, the solids and harmful substances are harmlessly treated according to requirements, and the environmental pollution is reduced. And the condition of environmental pollution is avoided. The method is suitable for the technical field of drilling fluid waste liquid in well drilling.

The invention belongs to the technical field of auxiliary preparation, and provides a curing material applied to a flameless combustion process of copper-containing sludge and a preparation method. The preparation method comprises the following steps: firstly, mixing iron nitrate nonahydrate, ferrous sulfate heptahydrate, a manganous nitrate solution and citric acid to prepare a ferrite precursor; further, a rare earth phosphate nano dispersion is synthesized through a hydrothermal method, lanthanum nitrate hexahydrate and cerium nitrate hexahydrate are used as rare earth sources, and ammonium dihydrogen phosphate and ammonium fluoride are introduced to provide phosphate radicals and fluorine ions; meanwhile, multi-element co-doped amorphous powder is prepared through a sol-gel method, tetraethoxysilane serves as a silicon source, zirconium oxychloride octahydrate, tetra-n-butyl titanate and niobium pentachloride are supplemented, a thermally stable amorphous oxide matrix is formed under high-temperature heat treatment, and the high-temperature mechanical property is provided; and finally, mixing kaolin or bentonite mineral powder with the synthesized ferrite precursor, the rare earth phosphate nano dispersion, the multi-element amorphous powder and other auxiliaries to form slurry, and drying to form the curing material.

The present invention discloses a geotube bag capable of stabilizing heavy metals and achieving efficient dehydration, comprising: an inner fabric layer, the inner side of which is provided with a heavy metal adsorption layer containing a heavy metal adsorbent; an intermediate fabric layer, the intermediate layer located outside the inner fabric; the intermediate fabric having a greater hydrophilicity than the inner fabric; and an average pore size larger than that of the intermediate fabric; and an outer fabric layer located outside the intermediate fabric; the outer fabric having a greater hydrophilicity than the intermediate fabric and an average pore size larger than that of the outer fabric. The geotube bag's unique structure improves dehydration efficiency, avoids secondary contamination of sediment by the use of flocculants, and improves treatment efficiency.

The invention discloses a solid-waste-based dredged sludge high-strength curing agent, a preparation method and application, and relates to the technical field of dredged sludge curing utilization, the solid-waste-based dredged sludge high-strength curing agent comprises 5-30% of coal gangue micro powder, 10-70% of slag micro powder, 5-20% of red mud micro powder, 5-25% of desulfurized gypsum micro powder, 3-30% of an activator, and 1-15% of an inorganic reinforcing agent. The curing agent is low in cost and wide in application prospect, solid waste resource utilization can be achieved, a new green sustainable development mode is constructed, the activity of the solid waste and dredged sludge is improved by adding the activating agent, curing of the dredged sludge is accelerated, and the strength of a cured body is improved by adding the inorganic reinforcing agent.

The application discloses an environment-friendly and efficient solidification and stabilization agent for calcium fluoride sludge and a preparation method thereof, and comprises the following raw materials in parts by weight: a chemical stabilization agent 20-30 parts, an inorganic solidification agent 60-70 parts, a microwave dehydration aid 1-5 parts and a pH regulator 2-5 parts. The application has the advantages of good treatment effect, solves the problems that the existing calcium fluoride sludge treatment agent has poor treatment effect on calcium fluoride sludge in the preparation process, harmful substances and pollutants in the calcium fluoride sludge are easy to penetrate into underground water or soil, environmental pollution is caused, and the treated sludge cannot reach the environmental protection standard and is disposed or utilized, which leads to the problems of re-releasing harmful substances in the use process and forming secondary pollution.

This invention provides a device and method for solidifying dredged slurry, belonging to the field of dredging technology. The device includes a mixing cylinder with a stirring structure inside, and further comprises a separation cylinder, a cylinder unblocking component, and a powder mixing component. The separation cylinder is disposed inside the mixing cylinder, and a first electric push rod is disposed between the separation cylinder and the inner wall of the mixing cylinder. An inlet and an outlet are respectively provided at the top and bottom of the separation cylinder. A bottom plate is rotatably disposed at the outlet, and a second electric push rod is movably disposed between the bottom plate and the separation cylinder. This invention uses the cylinder unblocking component to unblock the filter cylinder, ensuring the separation efficiency and effect of the subsequent filter cylinder in separating mud and water. Furthermore, when the cylinder unblocking component is working, it drives the powder mixing component to work, causing the annular powder box to vibrate, preventing lime powder in the annular powder box from clumping and affecting the mixing effect with the filtered mud, thereby ensuring the slurry solidification efficiency and effect.

The application belongs to the technical field of auxiliary agent preparation, and provides a solidified material applied to copper-containing sludge flameless combustion process and a preparation method; firstly, iron nitrate nonahydrate, ferrous sulfate heptahydrate, manganese nitrate solution and citric acid are mixed to prepare ferrite precursor; further, rare earth phosphate nanodispersion is synthesized by a hydrothermal method, lanthanum nitrate hexahydrate and cerium nitrate hexahydrate are used as rare earth sources, ammonium dihydrogen phosphate and ammonium fluoride are introduced to provide phosphate and fluoride ions; meanwhile, multi-component co-doped amorphous powder is prepared by a sol-gel method, tetraethyl orthosilicate is used as a silicon source, zirconium oxychloride octahydrate, titanium acid tetrabutyl ester and niobium pentachloride are used as auxiliary materials, and a thermally stable amorphous oxide matrix is formed under high-temperature heat treatment to provide high-temperature mechanical properties; finally, kaolin or bentonite mineral powder is mixed with the above-synthesized ferrite precursor, rare earth phosphate nanodispersion, multi-component amorphous powder and other auxiliary agents, a slurry is formed, and the slurry is dried and formed into a solidified material.

The application provides a kind of slurry shield mud high-efficiency green zero-discharge construction method, relating to slurry shield technology field, and the construction method includes slurry bucket groove construction, high-quality mud mixing, slurry separation treatment, new slurry preparation, slurry emergency treatment, by screening treatment to waste mud, solid particles in mud can be separated, treated mud can be recycled, effectively avoiding the generation of waste mud; geotextile tube can handle waste mud when slurry treatment equipment fails or runs overload, when shield machine passes through risk source, ensure continuous tunneling of shield machine and rapid passing, improve the reliability of shield; by adopting assembled bucket groove structure, construction is convenient and material can be reused, avoiding the risk of slurry leakage; the application realizes efficient continuous uninterrupted tunneling of slurry shield in complex environment by combining module bucket groove structure + slurry green treatment process + geotextile tube treatment.

The application discloses a multi-cutter-plate rotary grouting stirring head, which comprises a support, the top end of the support is connected with a link plate, the link plate is connected with a link rod, one side wall of the support is connected with a driving mechanism, and the other side wall of the support is provided with a grout conveying mechanism; the input pipe conveys grout, the hydraulic pipe provides power for a hydraulic motor, the hydraulic motor drives a rotating shaft to rotate, the rotating shaft is connected with an in-shaft grout conveying pipe and forms an integrated whole, thus, the in-shaft grout conveying pipe rotates synchronously, the input pipe inputs the solidified grout into the in-shaft grout conveying pipe through a universal grout conveyor, and then the solidified grout is output into a bottom pipe through an outlet hole, so that the effect of spraying the solidified grout is realized; meanwhile, the rotating shaft drives the cutter plate body to rotate, the cutter plate body drives the cutter blades to cut and tumble the sludge, the sludge can be simultaneously input with the solidified grout and cut and stirred, the mixing effect of the solidified grout and the sludge is enhanced, and thus the solidification effect of the sludge is indirectly improved.

A method and device for combining in-situ and ex-situ remediation of black and odorous water body sediments belongs to the field of sludge treatment technology. The device consists of an interconnected sludge suction pump, a sludge concentration tank, a sludge fermentation tank, a tailwater treatment tank, a clear water tank, a plate and frame filter press, a tailwater storage tank, and a chemical injector. The sediment is salvaged from the river channel, gravity concentrated, and fermented in an alkaline environment to fully release the pollutants in the sediment. After fermentation, the sediment is conditioned and dehydrated to complete the ex-situ remediation of the sediment. The tailwater generated by sediment concentration and dehydration is aerobically treated, and the purified tailwater is injected into the sediment. The nitrates, calcium ions, and iron ions in the purified tailwater are used to achieve in-situ remediation of the sediment. The deficiencies of each technology can be compensated for, reducing secondary pollution from ex-situ remediation of sediment, while also reducing the cost of chemicals for in-situ remediation.

The invention provides a channel dredging mud solidification device and method, and belongs to the technical field of channel dredging. A channel dredging mud solidification device comprises a mixing barrel, a separation barrel, a barrel dredging assembly and a powder mixing assembly, a stirring structure is arranged in the mixing barrel, the separation barrel is arranged in the mixing barrel, a first electric push rod is arranged between the separation barrel and the inner wall of the mixing barrel, and a feeding port and a discharging port are formed in the top and the bottom of the separation barrel correspondingly; a bottom plate is rotationally arranged at the discharge hole; a second electric push rod is movably arranged between the bottom plate and the separation cylinder; the filter screen cylinder is dredged through the cylinder dredging assembly, the subsequent mud-water separation efficiency and separation effect of the filter screen cylinder are guaranteed, the powder mixing assembly is driven to work when the cylinder dredging assembly works, the annular powder box is made to shake, the situation that lime powder in the annular powder box is caked to affect the mixing effect of mud blocks after filter pressing is avoided, and the mud-water separation efficiency and the mud-water separation effect are improved. Therefore, the slurry curing efficiency and the curing effect are ensured.

This invention provides a dewatering and solidification device and method for dredged sludge in inland waterways, belonging to the field of waterway dredging technology. The device includes a box with a feed inlet at the top, and further comprises: a discharge channel fixed to the inner wall of the box and connected to the feed inlet; a filter press assembly disposed within the box for filter pressing sludge; a guide trough disposed at one end of the filter press assembly for guiding the filter cake after pressing; a discharge trough disposed below the guide trough and connected to it; and several recessed holes at the bottom of the box communicating with the discharge trough; and a granulation preparation assembly. This invention solves the problems of slow dewatering, high pollution, and low resource utilization of dredged sludge by integrating filter pressing, dewatering, granulation, and hot air drying, achieving efficient dewatering and resource utilization of dredged sludge.

The present invention discloses a mixed-flow type automatic curing agent adding device, which comprises a storage container, a mixing pipe and an insertion pipe connecting the storage container and the mixing pipe; the storage container is used for storing the curing agent; one end of the mixing pipe is a sludge inlet, and the other end of the mixing pipe is a mixed liquid outlet; one end of the insertion pipe is communicated with the storage container, and the other end of the insertion pipe is communicated with the mixing pipe. The insertion pipe comprises at least one first insertion pipe and at least one second insertion pipe. In the cross-sectional view of the mixing pipe, the first insertion pipe is located on the clockwise side of the first diameter line of the mixing pipe passing through the insertion point, and the second insertion pipe is located on the counterclockwise side of the second diameter line of the mixing pipe passing through the insertion point. This device can achieve the full mixing of the curing agent and the sludge, increase the flow rate of the mixed liquid, improve the construction efficiency, save the construction period, avoid the problem of pipeline blockage during use, achieve the optimal ratio of the curing agent to the sludge, improve the utilization rate of the curing agent, and avoid waste caused by insufficient or excessive dosing of the curing agent.

The invention relates to the technical field of sludge purification treatment, in particular to an efficient sludge drying treatment device based on a fluidized bed and rotary suspension, which comprises a shell, a drying support unit is obliquely arranged in the shell, the drying support unit comprises a main mounting plate, a plurality of groups of drying units are movably mounted in the main mounting plate, and a plurality of groups of drying units are movably mounted in the main mounting plate. A total feeding port is formed in the shell, a total discharging port is formed in a port of one end, far away from the total feeding port, of the shell, a plurality of component feeding ports with the same number as the drying units are formed in the total feeding port, during working, even if one or more groups of drying barrels break down or need to be maintained, the drying work is not affected, and the drying efficiency is improved. The height of the end, close to the drying feeding port, of the discharging channel is larger than that of the other end of the discharging channel, the width of the end, close to the drying channel, of the discharging channel is larger than that of the other end of the discharging channel, and therefore sludge can be automatically and flatly laid, heat is evenly collected, mutual accumulation is avoided, and the drying effect is improved while the continuity is improved.

The PFAS capturing system 10 comprises a structuring reactor 20 including a reaction tank 21 and a pressurized floating separation apparatus 30 including a circulation device 40, wherein into a contaminated water with a PFAS-containing aqueous mixture stored in the reaction tank 21 of the structuring reactor 20, structural agents 1 and 2 are fed from the feeding section 22, the structural agent 1 is including a water-soluble cationic polymeric flocculant (A) capable of forming a high order structure containing high molecular weight carbon chains as a main structural agent, the structural agent 2 is including a water-soluble cationic polymer flocculant (B) as a main structural agent with a smaller cationic value than the water-soluble cationic polymer flocculant (A) which contains a positive charge and has a higher cationic value than the water-soluble cationic polymeric flocculant (A), which including at least one of an inorganic agent containing polyiron, ferric chloride, ferrous sulfate, ferric sulfate, polyaluminum chloride, sulfate band, and zinc chloride. By feeding the structural agent 1, a structure 1 is formed in contaminated water, and PFAS with anionic properties are adsorbed on the structure 1, and further, on the PFAS adsorbed on the structure 1, made of iron cation, aluminum cation etc., with hydrophobic carbon chains is formed by the structural agent 2, PFAS is held stably in a sandwich-like state between the structure 1 and the structure 2 so that it can be separated from the water. The PFAS is then formed in a pressure floating separation tank 32 of the pressurized floating separation apparatus 30, where a jet of pressurized ultrafine bubble containing water is formed in the contaminated water, and the contaminated water is circulated in the tank 32, and the structure 1 and the captured PFAS are made to float by the ultrafine bubbles and taken out as flotation scum, and the rest is made into PFAS reduced water, thus enabling the separation and capture of 30% or more of PFAS that are difficult to capture in the contaminated water.