91 results about "Dewatered sludge" patented technology

The invention discloses a method for removing heavy metals in sludge, and belongs to the field of environmental protection technology and solid waste recycling. The method comprises the following steps: adding a bioleaching bacteria solution and a nutritive salt solution into dewatered sludge, and adjusting the pH value to form mixed slurry; applying an asymmetric alternating-current electric field to the mixed slurry to perform biological-electrochemical coupling treatment, and performing solid-liquid separation on the treated slurry to respectively obtain purified sludge and leachate containing heavy metals. By utilizing polarization inhibition and oscillation mass transfer effects of the asymmetric alternating-current electric field, the removal efficiency of the bioleaching on the heavy metals in the sludge, especially the organic combined state and residual state heavy metals, is remarkably enhanced, and the method has the outstanding advantages of short treatment period, low energy consumption, no electrode polarization and high heavy metal removal rate.

This invention discloses a low-leakage, high-stability magnetic sludge biochar adsorbent, its preparation method, and its application, comprising the following steps: S1: preparing a sludge biochar matrix from dewatered sludge; S2: mixing the sludge biochar matrix obtained in step S1 with nano-magnetic powder, and performing high-energy ball milling under an inert atmosphere to obtain a composite powder with a physically interlocked structure, thereby preparing the low-leakage, high-stability magnetic sludge biochar adsorbent. This invention provides a structurally stable, high-adsorption-performance, and environmentally friendly magnetic sludge biochar adsorbent that can effectively remove polyether ionocarrier antibiotics (such as maduramycin) from water, showing promising practical application prospects and environmental benefits.

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 present application belongs to the field of environmental functional materials and water treatment technology, and aims to provide a preparation method of ceramic membrane based on endogenous pore forming and catalysis of sludge containing algae. The method comprises the following steps: taking dewatered sludge of water supply plant in algae outbreak period of water source, drying, ball milling and sieving to obtain sludge powder; soaking and washing after using organic acid with complexing ability as heavy metal removal agent, pre-carbonization treatment, dry pressing into embryo, sintering into membrane sheet; primary activation treatment in weak oxidizing strong acid, washing and heating treatment for secondary activation to obtain ultrafiltration ceramic membrane product. The method is simple in operation steps, easy to implement and green and environmental protection; the prepared ceramic membrane has good separation performance and high mechanical strength, can catalyze oxidizing agent commonly used in water treatment while filtering, and free radicals are generated by decomposition to degrade organic matter; or catalyze common cleaning agent sodium hypochlorite during membrane cleaning to generate free radicals to strengthen the cleaning effect.

The invention discloses a micro-nano ozone pretreatment, dehydration and reduction method for municipal sludge. The micro-nano ozone pretreatment, dehydration and reduction method for municipal sludge comprises the following steps: S1, preparing high-purity ozone gas; s2, preparing ozone micro-nano bubbles from the obtained high-purity ozone gas; s3, dispersing the ozone micro-nano bubbles into the sludge to obtain wall-broken sludge; and S4, dehydrating the wall-broken sludge to obtain dehydrated sludge. Compared with the prior art, the micro-nano ozone pretreatment dehydration reduction method for the municipal sludge has an effective dehydration reduction effect on the sludge, and has economic and environment-friendly effects at the same time.

1. Name of the design product: sludge transport tank truck. 2. Use of the design product: the design product is used for storing and transporting dewatered sludge. 3. Design points of the design product: in shape. 4. Picture or photo best indicating the design points: perspective view 1.

The invention relates to a sludge / biomass mixed drying process, and belongs to the technical field of sludge treatment. Feeding the dewatered sludge, the biomass, the furfural modified diatomite, the isocyanatopropyltriethoxysilane and the stannous octoate into a double-shaft differential mixer, and uniformly mixing; discharging the mixed material from a discharge port of the double-shaft differential mixer, conveying the mixed material to a corrosion-resistant mesh belt conveyor, and uniformly spreading the material on a mesh belt to form a material layer; a hot air drying system is started, a hot air furnace generates low-temperature hot air, and the low-temperature hot air penetrates through a material layer from bottom to top for drying after being distributed through an air duct; wet and hot waste gas generated by drying firstly enters a condensation dehumidification device to remove moisture, then enters a heat recovery device to recover heat, and finally is discharged after being purified to reach the standard; the furfural modified diatomite is prepared from diatomite, absolute ethyl alcohol, furfural and hydrochloric acid; the moisture content of dried materials is low, and the materials are free of caking, uneven drying and the like.

The utility model belongs to the technical field of sludge treatment, and particularly relates to a dewatered sludge treatment device which comprises a material box, a feeding hole is formed in the upper end of the material box, and a screw pump is arranged at the bottom of the material box; the interior of the treatment chamber is divided into an outer chamber and an inner chamber, and an ultrasonic vibration rod is arranged in the inner chamber; the motor group consists of a plurality of motors; a blade is arranged at the head end of each motor and located in the inner chamber, and the motors are located in the outer chamber. Sludge is fed into the inner chamber by the screw pump; the drying unit comprises a loading chamber and a drying chamber; a plurality of layers of tray structures are arranged in the loading chamber from top to bottom; a heating pipe is correspondingly arranged in the drying chamber; a plurality of drying chamber inlets are correspondingly formed in the left side wall connected with the loading chamber; after being filled with sludge, the tray on the uppermost layer in the loading chamber enters the upper part of the heating pipe on the corresponding layer in the drying chamber through the corresponding inlet of the drying chamber to be dried, and then materials are discharged from the outlet of the drying chamber respectively.

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.

The utility model discloses a dewatered sludge sampling device, which comprises: a sampling tube housing, the interior of the sampling tube housing is provided with an accommodating space, and the surface of the sampling tube housing is provided with a sludge discharge port; one end of the sampling tube shell is connected with a concave table, and a fixed through hole is formed in the concave table; the push rod assembly penetrates through the fixing through hole and is arranged in the accommodating space; the push rod assembly is further fixedly connected with a limiting block. The sliding sleeve assembly is installed at the end, close to the limiting block, of the push rod assembly. The bone rod support is installed in the middle of the sliding sleeve assembly, and flexible supporting cloth is installed on the edge of the bone rod support. The dewatered sludge sampling device is simple in structure and convenient to use, dewatered sludge samples can be collected through simple handle push-pull actions, the problem that time and labor are wasted in the operation process is solved, the sampling efficiency is greatly improved, and the sampling continuity and consistency 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 invention relates to a method for controlling the addition of a flocculant to a sludge, wherein the sludge is dewatered and images are made of the dewatered sludge and / or the dewatered liquid with a camera system. It is characterised in that the images are evaluated with a computer-implemented computational model that has previously been trained with a training data set, whereby the computational model divides the images into sub-images, classifies them and thus assesses the dewatering of the sludge. Optimal dewatering is achieved with improved ecological and economic efficiency.

This invention relates to a combined conditioner and method for deep sludge dewatering. The combined conditioner comprises cationic surfactants, anionic surfactants, coagulants, and flocculants. By combining cationic and anionic surfactants, the conditioner optimizes the solubilizing and dispersing properties of the surfactants, significantly improving their ability to dissolve extracellular polymers in sludge and enhancing the release of bound water. Furthermore, by combining the coagulant and flocculant, the charge neutralization effect is enhanced, increasing the size and strength of the sludge flocs. This invention solves the problems of low sludge dewatering efficiency in current urban wastewater treatment plants and the increased volume of dewatered sludge caused by the addition of large amounts of lime, fly ash, and other materials during sludge dewatering. It improves the efficiency of deep sludge dewatering, is simple to use, does not generate secondary pollution, and significantly reduces the subsequent treatment costs of sludge, providing a new method for deep sludge dewatering.

The application belongs to the technical field of resource recycling, and provides a kind of river revetment embankment soil prepared by using low organic matter dewatered sludge and a preparation method thereof.The river revetment embankment soil comprises low organic matter dewatered sludge, composite aggregate, composite solidifying agent and raw soil;the composite aggregate comprises cement-coated recycled aggregate, gravel and silane-modified waste rubber particles;the composite solidifying agent comprises cement, alkali-activated blast furnace slag, silane-modified montmorillonite and biochar.The application takes low organic matter dewatered sludge as one of the main raw materials, simultaneously absorbs a large amount of construction waste recycled aggregate, industrial blast furnace slag, waste rubber and other multi-source solid waste, realizes waste control by waste through the complementation of the functions of various components and the optimization of process parameters, and the on-site mixing and layered compaction process adopted is simple and easy to implement, has high construction efficiency, and has good engineering adaptability and application value.

The utility model discloses a waterworks tail water sludge dewatering device, which belongs to the technical field of sludge dewatering and comprises a bottom plate and a dewatering frame, two vertical plates are symmetrically and fixedly mounted on the top surface of the bottom plate, and a transverse plate is fixedly mounted between the two vertical plates; the dewatering frame is slidably mounted between the two transverse plates, sliding blocks are symmetrically and fixedly mounted on the side walls of the transverse plates, sliding grooves are formed in the side walls of the transverse plates, and the sliding blocks are slidably inserted into the sliding grooves; a strip-shaped hole is formed in the top surface of the dewatering frame, a dewatering plate is slidably mounted in the strip-shaped hole, a plurality of baffles are fixedly mounted on one side of the dewatering frame, and a filter screen is mounted on the inner wall of the dewatering frame; and an extrusion plate is slidably mounted on the inner wall of the dewatering frame, a connecting rod is fixedly mounted on one side of the extrusion plate, and a connecting plate is fixedly mounted at the tail end of the connecting rod. Compared with the prior art, the sludge dewatering device has the advantages that sludge can be effectively dewatered, the dewatered sludge can be conveniently discharged, and the dewatering plate can be conveniently cleaned.

Systems and processes provide for a thermal process to transform sludge (and a variety of other natural waste materials) into electricity. Dewatered sludge and other materials containing a high amount of latent energy are dried into a powdered biofuel using a drying gas produced in the system. The drying gas is recirculated and is heated by the biofuel produced in the system, waste heat (from turbines or internal combustion engines), gas (including natural gas or digester gas) and / or oil. The biofuel is combusted in a boiler system that utilizes a burner operable to burn biofuel and produce heat utilized in a series of heat exchangers that heat the recirculating drying air and steam that powers the turbines for electricity production.

The application discloses a tap water plant sludge dewatering and discharging device and belongs to the technical field of sludge treatment. The device comprises a lifting bottom plate, the upper surface of the lifting bottom plate is provided with a filtering mechanism, the filtering mechanism comprises a filtering assembly for playing a dewatering filtering role on sludge, a plugging assembly for driving the filtering assembly to rotate and playing a regulating role on the opening and closing state of the bottom opening end of the filtering assembly, and a pressurizing assembly for playing a compression role on the sludge in cooperation with the filtering assembly, the pressurizing assembly is arranged at the top of the filtering assembly, and the plugging assembly is arranged at the bottom of the filtering assembly. The filtering assembly comprises a second limiting support disc. Through the cooperation of multiple structures, centrifugal dewatering and extrusion dewatering are performed on the sludge. Through the cooperation of the two dewatering modes, rapid and sufficient dewatering of the sludge is realized, and the application can automatically and rapidly discharge the dewatered sludge.

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 discloses a method for synergistically dehydrating oil tanker tank washing water sludge by oxidizing poly-iron with ozone, and belongs to the technical field of sludge treatment and environmental engineering, the method comprises the following steps: S10: adding ozone into the oil tanker tank washing water generated sludge to carry out oxidation pretreatment so as to destroy the colloid structure of the sludge and release internal bound water; s20, a polymeric ferric sulfate solution is added into the sludge subjected to oxidation pretreatment for a coagulation reaction, and sludge particles are promoted to be agglomerated to form sludge flocs through electric neutralization and adsorption bridging effects; and S30, carrying out vacuum filtration and dehydration on the sludge floc to obtain dehydrated sludge. Through ozone oxidation pretreatment, a stable colloid and an emulsified film formed by'oil-surface activity-solid 'are destroyed, so that the dehydratability of the oily sludge is fundamentally improved; subsequently adding a polymeric ferric sulfate solution, and agglomerating fine particles into a compact floc under the action of electric neutralization and adsorption bridging; and finally, deep dehydration is realized through vacuum filtration, so that the specific resistance and the water content are remarkably reduced.

The invention discloses a cofferdam beach building mangrove forest rapid construction and carbon sequestration capability improvement method, which comprises the following three core steps: 1, constructing a layered composite carbon sequestration matrix structure; a lower water storage and fertilizer conservation impervious layer composed of modified clay and waste shells, a middle core carbon sink enhancement layer composed of biochar, dewatered sludge, slow release fertilizer and growth promoting bacteria and an upper stabilizing and planting layer composed of original dredger fill are sequentially laid from top to bottom, and soil improvement and carbon sink foundation construction are achieved. Secondly, the microhabitat and intelligent hydrology in the cofferdam are precisely regulated and controlled, a tidal creek, a shallow pit and a gentle slope microtopography are artificially molded, and a natural tide rule is simulated to meet the requirements of different growth stages of the mangrove forest in cooperation with an intelligent pump station and a water-salt sensor driven by tidal energy; thirdly, an integrated carbon sink monitoring, verification and intelligent management and protection system is built, multi-source data are obtained through an Internet of Things monitoring network, the carbon sink amount is inversely predicted in combination with a digital twinborn body and an AI algorithm, credible data storage is achieved through a block chain, and growth abnormity is automatically early warned and accurate intervention is guided. The mangrove forest seedling survival rate and carbon sequestration efficiency can be remarkably improved, green, low carbon and economical efficiency are both considered, and an effective technical scheme is provided for mangrove forest ecological restoration and blue carbon asset development in the cofferdam beach building area.

The invention belongs to the technical field of heavy metal passivators, and particularly relates to a heavy metal passivator applied to stabilization and oxidation resistance of a heap and a using method and application of the heavy metal passivator. The heavy metal passivator comprises dewatered sludge, livestock and poultry manure, biomass straw, a microbial agent, steel slag, industrial solid waste, Hangzhou cotton soil, coal ash, pelelith and chloroaluminate. Compared with the prior art, in the soil remediation process of the heavy metal passivator applied to pile stabilization and oxidation resistance, heavy metal ions enter a crystal structure formed by a chloroaluminate hydration product due to mineralization to form a replacement type solid solution, so that the heavy metal is in a very stable form in a new solidified body, and the heavy metal is more stable in the soil remediation process. The toxicity to the environment is reduced. In addition, means of smoldering, composting fermentation and the like are adopted in the use process, so that strong reaction can be carried out in a weak-base and normal-temperature environment in the heavy metal replacement process.

The sludge treatment device for live poultry processing comprises a treatment box, an extrusion cylinder, a screen cylinder, a pressing plate and a cylinder bottom cover, an installation partition plate is fixedly installed in an inner cavity of the treatment box, the extrusion cylinder is fixedly installed between the installation partition plate and the inner wall of the treatment box, the screen cylinder is fixedly installed on the side wall of the extrusion cylinder, and the pressing plate is fixedly installed on the screen cylinder. A hydraulic cylinder is installed on the side wall of the treatment box, the output end of the hydraulic cylinder is connected with a pressing plate located in an inner cavity of the extrusion cylinder, a first heater is installed on the pressing plate, a first heating metal plate is fixedly installed on one side of the first heater, and a nut is fixedly installed in the center of the side wall of the other side of the treatment box. A threaded rod shaft is installed in the nut in a matched mode. The sludge dewatering and extruding device has the beneficial effects that the sludge dewatering and extruding device is provided with the treatment box, the extruding cylinder, the screen cylinder, the pressing plate and the cylinder bottom cover, sludge can be dewatered and extruded more sufficiently, the screen cylinder is not easy to block, meanwhile, high-temperature sterilization can be realized while dewatered sludge is dried, and the practicability is higher.

The utility model discloses a sludge dewatering and extruding device for sludge treatment, and relates to the technical field of sludge treatment. The device comprises a rack, wherein an extrusion cylinder is arranged at the top of the rack; and a driving assembly is arranged on one side of the extrusion cylinder and comprises a first driving wheel, the first driving wheel is located at the top of the rack, and a second driving wheel is arranged at the bottom of the first driving wheel. The extrusion cylinder is blocked through the blocking head, the effect of sludge gravity extrusion self-dewatering is achieved, blocking of the extrusion cylinder by the blocking head can be relieved by periodically driving the motor, dewatered sludge is discharged from the discharging port, sewage generated by gravity extrusion is discharged from the water drainage pipe through the water leakage hole, solid-liquid separation is achieved, and when the sludge is discharged, the sludge is discharged through the water leakage hole. Meanwhile, the driving rod is driven to rotate, so that the cleaning head is driven to clean the water leakage hole in a reciprocating manner, the water leakage hole is prevented from being blocked by sludge, smooth water passing is guaranteed, and the dewatering effect is guaranteed.

The present application belongs to the technical field of artificial intelligence processing of metal surface treatment wastewater pollution, and discloses an intelligent control method for metal surface treatment wastewater sludge dewatering, which comprises the following steps: collecting characteristic data of wastewater sludge in real time; matching parameters in a preset dewatering parameter database to obtain a dewatering control parameter group; performing multi-stage dewatering on a dewatering device during metal surface treatment wastewater to obtain primary dewatering sludge; monitoring the water content in the primary dewatering sludge and the filtrate turbidity during metal surface treatment wastewater to obtain a dewatering effect quantitative value; performing gradient correction on the dewatering control parameter group based on the deviation of the dewatering effect quantitative value and a purification threshold to obtain an optimized dewatering parameter group; and performing deep dewatering on the primary dewatering sludge to obtain recycled water after metal surface treatment wastewater; the present application can improve the efficiency of intelligent control of metal surface treatment wastewater sludge dewatering.

The invention provides a sludge and agricultural waste co-pyrolysis biochar remediation system and a method thereof. The method comprises the following steps: mixing dewatered sludge and agricultural wastes according to a dry weight ratio of (1: 0.5)-(1: 3); feeding the mixed material into a pyrolytic reaction device for two-stage co-pyrolysis: performing pyrolysis at 200-350 DEG C in an inert atmosphere in the first stage, and performing pyrolysis at 500-700 DEG C in the presence of carbon dioxide in the second stage; the obtained biochar is used for environmental remediation; the system comprises a pretreatment unit, a two-stage pyrolytic reaction unit, a product treatment unit and a pyrolytic gas energy recycling unit, and relates to the technical field of environmental protection and solid waste recycling, biochar with a carbon skeleton and a mineral mosaic structure is prepared through a synergistic pyrolysis process of a specific raw material ratio and multi-stage gas modulation, and the biochar energy is recycled. The material simultaneously has heavy metal stability and high pollutant adsorbability, and the aims of treating waste with waste and safely and efficiently repairing the environment are achieved.

This method predicts the degree of sintering based on the combination of dewatered sludge composition and incineration temperature. [Solution] The system includes an acquisition unit that acquires information indicating the composition of the dewatered sludge to be incinerated and the incineration temperature for incinerating the dewatered sludge; a prediction unit that predicts the degree of sintering when the dewatered sludge to be incinerated is incinerated at the incineration temperature, based on the liquid phase ratio predicted based on the combination of composition and temperature acquired by the acquisition unit and table information that associates the degree of sintering with the combination of composition and incineration temperature; and an output unit that outputs the degree of sintering predicted by the prediction unit.

The present invention provides a manufacturing method for slow‑release sludge-based nutrient soil. The manufacturing method comprises: blending a first biochar, a compound microbial agent, and a first binder in a set ratio, and performing first-stage granulation to form first-stage slow-release nutrient soil particles; blending dewatered sludge and a slow‑release material in a set ratio, and blending same with the first-stage slow-release nutrient soil particles for second-stage granulation to form second-stage slow‑release nutrient soil particles; and blending a second biochar and a second binder in a set ratio, and blending same with the second-stage slow-release nutrient soil particles for third-stage granulation to form third-stage slow-release nutrient soil particles. The manufacturing method relates to using multi-stage granulation to prepare slow-release sludge-based nutrient soil, which can not only achieve slow release of organic matter, nutrients and salts, but also reduce the mobility of toxic and hazardous substances in dewatered sludge, thereby reducing the risk of soil and water pollution, improving the utilization rate of nutrients in the dewatered sludge, and reducing the environmental risks posed by the dewatered sludge.

The invention relates to a method (100) for producing a construction material from a quarry effluent, the method comprising: - a flocculation step (110) for forming a clay-silt sludge; - a step (120) of collecting the clay-silt sludge having a dry matter content of 20% or greater; - a step (190) of forming a construction material, comprising adding the sludge to a construction material mixture; - a step (150) of breaking down the flocculant and / or a step (180) of adding an organic deflocculant. The invention further relates to a method (200) for treating a clay-silt sludge so as to form a sludge cake suitable for forming a construction material. The invention lastly relates to a method (400) for producing a construction binder, a system (1) for forming a construction binder and a system for mechanically dehydrating a sludge, which are associated therewith.

The application discloses a sludge hydrothermal carbonization treatment system applying waste heat steam, and belongs to the technical field of organic solid waste treatment, which comprises a hydrothermal carbonization reaction tank with a stirrer, a sludge inlet is arranged at the bottom of the hydrothermal carbonization reaction tank, a sludge outlet is arranged at the top of the hydrothermal carbonization reaction tank, the stirring shaft of the stirrer penetrates through the hydrothermal carbonization reaction tank and is communicated with a steam pipe, and a plurality of steam outlets are arranged on the hollow stirring shaft. The waste heat steam enters the sludge in the hydrothermal carbonization reaction tank through the steam outlets on the stirring shaft, the sludge is fully mixed with the steam through the stirrer, and the hydrothermal carbonization reaction of the sludge is realized. The sludge is directly heated by the waste heat steam to generate the hydrothermal carbonization reaction, the heating efficiency is improved, and the energy consumption is reduced through the direct contact and heating of the steam and the sludge; meanwhile, the steam is liquefied, the sludge fluidity is improved, the heat conduction efficiency is improved, and the hydrothermal carbonization reaction is ensured. The application has compact structure and small land occupation, and can be used for treating river dredging sludge, dewatered sludge of a sewage treatment plant or ditch sludge.

The invention relates to the technical field of sludge treatment, in particular to a sludge dewatering treatment method. The treatment method comprises the following steps: (1) mixing a protein destabilizing agent with sludge to be treated for pretreatment to obtain pretreated sludge; (2) mixing monocarboxylic acid with an inorganic coagulant to obtain a pre-complexing conditioner; and (3) adding the pre-complexing conditioner into the pretreated sludge to carry out conditioning reaction, and carrying out solid-liquid separation to finish the treatment. According to the dehydration treatment method provided by the invention, bound water and intracellular water in the sludge are converted into free water to the greatest extent through a multi-stage and targeted action mechanism of pretreatment-pre-complexation synergism-product synergistic dehydration, so that deep dehydration of the sludge is realized, a filter cake with strong pressure resistance and good permeability is obtained, strict requirements of incineration and the like are met, and the method is suitable for industrial production. Meanwhile, monocarboxylic acid exists in a liquid phase system and can be used as a carbon source, the subsequent treatment cost is saved, and the method is particularly suitable for deep conditioning and efficient dehydration of high-organic-matter sludge difficult to dewater.