182results about "Byproduct vaporization" patented technology

The invention relates to a heavy metal stabilizer and a preparation method and application thereof, and relates to the technical field of heavy metal stabilizers. The preparation method comprises the following steps: weighing sepiolite, adding hydrochloric acid, carrying out constant-temperature water bath, carrying out centrifugal separation to obtain a precipitate, drying the precipitate, and grinding to obtain the heavy metal stabilizer for sludge pyrolysis. Natural sepiolite is used as a base material, acid activation treatment is carried out through hydrochloric acid to obtain the heavy metal stabilizer, the heavy metal stabilizer is used in sludge pyrolysis, in the pyrolysis process, the heavy metal stabilizer fixes heavy metal in a pyrolysis product carbon in a stable form through the effects of surface adsorption, ion complexation, high-temperature packaging and the like, and the heavy metal stabilizer is used for sludge pyrolysis. Therefore, the emission of heavy metals in the pyrolysis process is reduced, and the ecological risk and the use risk of the pyrolysis product carbon are reduced.

The invention relates to the technical field of oil sludge resource regeneration, and discloses a water oil sludge resource regeneration device based on a composite ultrasonic field and application. The device comprises an oil sludge parameter acquisition module, a resonant frequency analysis module, a sound field coupling control module, a phase shift interference analysis module and a separation strengthening execution module. The oil sludge parameter acquisition module acquires a rheological characteristic data set of the oil-containing sludge in real time; the resonance frequency analysis module generates a dual-target resonance frequency parameter based on the data set; the sound field coupling control module drives the piezoelectric transducer array to generate a focused ultrasonic field, and a sound field coupling model is constructed; the phase shift interference analysis module corrects the phase offset of the model and outputs a multi-band sound energy injection sequence; and the separation strengthening execution module regulates and controls the rotating speed gradient of the mechanical centrifugal unit, triggers membrane stack pulse backwashing, and finally generates regenerated base oil and a purified water phase product. According to the device, efficient regeneration of water-oil sludge resources is realized through cooperation of multiple modules.

The invention relates to a calcium-based difunctional composite material and a preparation method and application thereof, the calcium-based difunctional composite material is applied to pollution control in a sludge-low-rank coal co-pyrolysis process, the calcium-based difunctional composite material is composed of Ca2Fe2O5 and an adsorptive material, and the mass ratio of Ca2Fe2O5 to the adsorptive material is 1: 1. According to the calcium-based bifunctional composite material, the fixation rate of sulfur in pyrolytic carbon is remarkably increased, conversion of heavy metal to a more stable form is facilitated, and the leaching capacity and potential ecological risks of the heavy metal are remarkably reduced.

The invention provides a method and a system for strengthening sludge treatment and nanometer material co-production through synergy of electrochemistry and ozone catalysis, and application of the method and the system, and relates to the technical field of environmental governance and resource recovery, in particular to the method for strengthening sludge treatment and nanometer material co-production through synergy of electrochemistry and ozone catalysis. Comprising the following steps: (a) performing electrochemical catalytic oxidation treatment on sludge slurry; (b) pyrolyzing the sludge treated in the step (a) to obtain volatile components; and (c) converting the volatile component into nano silicon dioxide through a vapor deposition reaction. According to the electrochemical-ozone catalysis synergistic enhanced sludge treatment and nano material co-production method provided by the invention, electrochemical catalytic oxidation, pyrolysis and vapor deposition processes are organically integrated, so that efficient removal of pollutants in sludge and synchronous conversion of high-value nano materials are realized.

The invention provides iron-manganese composite oxide modified biochar (FM-SBC) as well as a preparation method and application thereof, and relates to the technical field of modified biochar. The method comprises the following steps: drying, grinding, modifying, drying and pyrolyzing excess sludge of a secondary sedimentation tank of an urban sewage treatment plant, and modifying the excess sludge by using an iron-manganese composite oxide to obtain the iron-manganese composite oxide modified biochar. The iron-manganese composite oxide modified biochar can be used as an efficient catalyst of persulfate (PS), provides technical support for treatment of refractory organic wastewater by enhancing the catalytic effect and enhancing efficient degradation of refractory organic pollutants such as azo dyes, and is of great significance to sustainable development of the environment.

The application provides a continuous sludge pre-drying method and system, and relates to the technical field of sludge treatment.The application provides a continuous sludge pre-drying system, which comprises sequentially connected sludge storage devices, sludge slitting devices, primary mixing devices, pre-drying devices and secondary mixing devices.The application also provides a pre-drying method, which comprises the following steps: conveying sludge in the sludge storage devices to the sludge slitting devices to slit the sludge; adding adsorbents to the slit sludge to obtain mixed sludge, and conveying the mixed sludge to the primary mixing devices to perform primary crushing and mixing; outputting the sludge discharged from the primary mixing devices to the pre-drying devices, outputting the pre-dried sludge to the secondary mixing devices to perform secondary crushing and mixing, and obtaining pre-dried sludge.The system and method provided by the application can realize short sludge pre-drying cycle, high sludge drying efficiency and stable sludge drying effect.

The invention discloses an oily sludge thermal desorption treatment system and a treatment process, the oily sludge thermal desorption treatment system comprises a tank body, the feeding end of the tank body is rotatably provided with a connecting sleeve, the oily sludge thermal desorption treatment system also comprises a feeding pipe, the feeding pipe is fixedly connected in the connecting sleeve, one end of the feeding pipe is sleeved with a material guide pipe, the material guide pipe is movably arranged on the feeding pipe, one end of the connecting sleeve is provided with a cleaning piece, and the cleaning piece is in transmission connection with the tank body. According to the device, the movement of the material guiding pipe is controlled through oil sludge in the feeding pipe, so that the material guiding pipe extends into the tank body along the feeding pipe, the oil sludge is extruded out in a strip shape through the discharging hole, the strip-shaped oil sludge extruded out of the material guiding pipe is broken through the cleaning piece, and the phenomenon that the oil sludge is accumulated at the feeding end of the tank body in a lump mode is reduced; the accumulated oil sludge is prevented from being coked on the inner wall of the high-temperature tank body, the material guide pipe is driven by the cleaning piece to rotate along the axis of the feeding pipe, the inner wall of the feeding pipe is cleaned through the arc-shaped strip fixedly connected in the material guide pipe, and the phenomenon that the feeding pipe is blocked due to the fact that the residual oil sludge is dried and caked in the feeding pipe is avoided.

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 application belongs to the field of heavy metal water pollution treatment, and relates to a method for rapidly and efficiently oxidizing trivalent arsenic through enhanced electron transfer, which comprises multifunctional biochar preparation and efficient oxidation process design. The method uses sludge as a biochar precursor, obtains multifunctional biochar with strong alkalinity, high specific surface area and super electron conduction through high-temperature pyrolysis, directly introduces oxygen into an As(III) solution, adds the biochar into the system after the aeration is completed, and fully stirs. The method is simple, economically feasible, has extremely high oxidation efficiency, does not require additional chemical reagents, has no reagent residues, and does not require external light or electricity. The non-free radical oxidation path dominated by electron transfer and singlet oxygen is not easily affected by inorganic ions and humic acid in actual water bodies, has strong anti-interference ability, and has a wide application range. The application not only helps to enrich the catalytic oxidation theoretical system, but also greatly improves the practical feasibility of biochar application, and has good environmental and economic 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 invention discloses low-energy-consumption municipal sludge dehydration and pyrolysis integrated equipment. The equipment comprises a sludge crushing mechanism, a sludge pulsation dehydration mechanism, a sludge vacuum dehydration mechanism and a sludge pyrolysis mechanism which are connected in sequence, the sludge crushing mechanism comprises a sludge crushing containing barrel shell, a crushing main stirring shaft is rotationally connected into the sludge crushing containing barrel shell, and a plurality of sludge crushing rods are fixed to the crushing main stirring shaft; the sludge pulsation dewatering mechanism comprises a dewatering mechanism containing box, an extrusion dewatering input pipe and an extrusion dewatering output pipe which are coaxially arranged are fixed to the left end and the right end of the dewatering mechanism containing box respectively, and a flexible pulsation dewatering pipe is arranged between the extrusion dewatering input pipe and the extrusion dewatering output pipe; the equipment has the core advantages of integrated integration, low-energy-consumption design, efficient treatment, precise control, environmental protection and reliability, the whole treatment process can be seamlessly joined, the problems of sludge scattering, secondary pollution and moisture content rising in traditional segmented treatment are avoided, and the transfer energy consumption and the labor cost are reduced.

The invention relates to the technical field of environmental protection, and discloses a Fenton sludge pyrolysis recycling device which comprises a heating system, a sludge rolling and conveying system and a pyrolysis gas collecting and conveying system, the heating system comprises an inner cylinder and a heat storage assembly; a flame gun is mounted on one side of the inner barrel, and a smoke outlet is formed in the other side of the inner barrel; the heat storage assembly is installed on the inner wall of the inner barrel, and an air inlet structure is arranged on the side wall, close to the flame gun, of the inner barrel. The sludge rolling conveying system comprises an outer cylinder and an auger conveying assembly; the inner cylinder is sleeved with the outer cylinder, and the auger conveying assembly is installed between the inner cylinder and the outer cylinder. A feeding assembly and a discharging assembly are installed on the two sides of the outer cylinder correspondingly. The pyrolysis gas collecting and conveying system comprises a heat preservation assembly, a pyrolysis gas collecting pipe and a pyrolysis gas conveying pipe, and filtering equipment and a fan are installed on the pyrolysis gas conveying pipe. Self-burning of pyrolysis gas in the device can be achieved, the overall heat utilization rate and the treatment effect are improved, the structure is simple, the space utilization rate is high, starting and stopping are convenient, and the manufacturing cost is reduced.

The invention relates to an oil-containing sludge biochar catalyst, a preparation method thereof and a method for removing organic pollutants in sewage, the method comprises the following steps: S1, heating a mixture containing saccharides, amino compound raw materials, inorganic alkali and oil-containing sludge for Maillard reaction to obtain a precursor containing a nitrogen-containing heterocyclic compound; wherein the amino compound raw material contains amino acid and / or protein; and S2, in an inert atmosphere, carrying out pyrolysis on the precursor containing the nitrogen heterocyclic compound. The oily sludge biochar catalyst prepared by the method disclosed by the invention has a better catalytic effect on activating persulfate to degrade organic pollutants in a water body.

The invention belongs to the technical field of oil sludge treatment, and particularly provides an oil sludge wastewater innocent treatment process which comprises thermal refining, solid-liquid separation, oil-water separation, PAM removal, wastewater treatment and solid-phase innocent treatment. The harmless treatment of the oily sludge wastewater has the advantages of simple process, mild conditions, environmental friendliness and the like, is suitable for oily sludge treatment scenes of oil fields, refineries and the like, and has remarkable industrial application value and environmental protection benefits.

The invention discloses thermocatalytic degradation equipment and method for reduction treatment of biochemical sludge. The equipment comprises an equipment base, a degradation barrel, a dehydration assembly and a pyrolysis assembly, the degradation cylinder is arranged on the equipment base, and a filter plate is arranged at the lower end of the degradation cylinder; the dehydration assembly comprises an extrusion disc clamped in the degradation barrel, a pushing frame clamped on the equipment base and connected with the extrusion disc, and a driving motor for providing power for the pushing frame; the pyrolysis assembly comprises a sliding heat insulation seat clamped in the extrusion disc, an electric heating rod arranged on the sliding heat insulation seat and a hydraulic oil cylinder for providing power for the heat insulation seat; the equipment disclosed by the invention is reasonable in structural design, the biochemical sludge is subjected to mechanical dehydration treatment before thermocatalytic degradation treatment, so that the volume of the biochemical sludge is effectively reduced, and the reduction treatment of the biochemical sludge is promoted; meanwhile, when the dewatered biochemical sludge is heated, the energy consumption of the equipment is lower, and the equipment is suitable for popularization and application.

This present invention relates to compositions and methods of microbial enhanced oil recovery using Bacillus subtilis strains. The invention also relates to compositions and methods for performing oil degradation with Bacillus subtilis strains. The compositions and methods of the present invention are also used for enhanced commercial biosurfactant and enzyme production.

A process for recovering phosphorus from sewage sludge is characterised in that sewage sludge undergoes a tumbling process in a rotary kiln (10) and the expelled phosphor is collected in the form of a gaseous phosphorus pentoxide.

The invention relates to the technical field of sludge treatment, in particular to high-activity papermaking sludge incineration ash as well as a preparation method and application thereof. The preparation method of the high-activity paper mill sludge incineration ash comprises the following steps: S1, carrying out sectional type hot air drying on dewatered paper mill sludge, so that the water content of the sludge is reduced to 15-25%; s2, feeding the dried sludge into a circulating fluidized bed incinerator, and pyrolyzing the papermaking sludge at 450-550 DEG C under an anoxic condition; carrying out activated combustion on the pyrolysis product under the conditions of oxygen enrichment and superheated steam injection at the temperature of 650-750 DEG C; then carrying out short-time stabilizing treatment on ash particles generated by activated combustion at 850-950 DEG C, and quenching; and S3, the cooled ash is ground, and the high-activity paper mill sludge incineration ash is obtained. The high-water-absorption material is prepared from the sludge incineration ash, and efficient treatment and resource utilization of dredged soil, river and lake bottom mud and engineering slurry are achieved.

The application discloses a sludge biochar heavy metal directional solidification intelligent control system, and belongs to the technical field of solid waste resource treatment and intelligent control, which comprises a sludge pretreatment module, a pyrolysis reaction module, an atmosphere regulation module, a product treatment module, a sensing monitoring array, an intelligent control center and a dynamic compensation module; the sludge pretreatment module is used for pretreating original sludge; the pyrolysis reaction module is used for receiving the pretreated sludge and performing pyrolysis reaction; the atmosphere regulation module is used for providing and adjusting the reaction atmosphere to the pyrolysis reaction module; and the product treatment module is used for cooling and collecting the generated biochar. Through the closed-loop control of sensing, decision-making, execution and compensation, the sludge pyrolysis process is dynamically associated with the heavy metal directional solidification target, so that the accurate, stable and self-adaptive regulation and control of the production process are realized without shutdown.

The invention relates to the technical field of sludge calcination, in particular to a method for regulating and controlling a phosphorus phase in a sludge calcination product by utilizing kaolinite. The invention discloses a method for regulating and controlling a phosphorus phase in a sludge calcined product by utilizing kaolinite. The method comprises the following steps: calcining a mixture of kaolinite and sludge in a certain proportion at 600-700 DEG C for 2-4 hours; in the mixture, the mass ratio of kaolinite is 8-10%. The kaolinite is added to be pyrolyzed and calcined with the sludge, under the synergistic effect of proportion, temperature and the like, phosphorus phase reconstruction in the calcined sludge product is regulated and controlled, the total phosphorus (TP) preservation amount is increased, and phosphorus in the sludge is converted into a form which has higher recovery value, higher bioavailability and is easier to extract subsequently, especially apatite-state phosphorus (AP); the phosphate fertilizer is stable in chemical property and moderate in solubility, and is a source of high-quality phosphate fertilizer or phosphorus chemical raw materials.

The invention discloses a method for enhancing sludge heavy metal pollution control through two-stage pyrolysis of modified kaolin, which comprises the following steps: placing sludge in a first-stage pyrolysis area of a reaction vessel for pyrolysis at 500-800 DEG C, placing modified kaolin in a second-stage pyrolysis area of the reaction vessel for adsorption at 600-800 DEG C for 2-3 hours, and placing the modified kaolin in a third-stage pyrolysis area of the reaction vessel for adsorption at 500-800 DEG C for 2-3 hours; pyrolysis and adsorption are carried out at the same time in an inert atmosphere, and the common time is 30-60 min; the preparation method of the modified kaolin comprises the following steps: uniformly mixing kaolin and a chitosan solution, and carrying out coprecipitation, stirring, washing, freeze drying and ball milling to prepare the chitosan amino modified kaolin composite material. The adsorption of volatile heavy metals is enhanced while most of the heavy metals are fixed on the biochar, so that the potential ecological risk of the heavy metals in the sludge is further reduced.

The utility model relates to multistage spiral carbonization equipment applied to the field of sludge carbonization, which comprises a rack, a plurality of spiral carbonization structures positioned in the rack and a pyrolysis gas output structure mounted on the right side of the rack, the rack comprises a plurality of supporting seats, the upper ends of the plurality of supporting seats are jointly and fixedly connected with a supporting frame, and the lower ends of the plurality of supporting seats are fixedly connected with the pyrolysis gas output structure. A heat preservation layer is fixedly connected to the outer surface of the supporting frame, the multi-stage spiral drying equipment is stacked in a closed rack, the spiral carbonization structure and the rack form a closed hot flue gas flowing channel, and after hot flue gas is introduced, the hot flue gas continuously heats the multi-stage spiral drying equipment. The sludge in the spiral dryer exchanges heat with high-temperature flue gas, organic matters in the sludge are converted into pyrolysis gas, and in the carbonization process, external air does not easily enter the equipment, so that the conditions of over-high oxygen content and flue gas temperature reduction in the equipment are effectively avoided, and the sludge carbonization effect is further effectively improved.

The application discloses a high-energy electromagnetic multi-phase catalytic reinforced sludge cracking device and a sludge treatment method. The device comprises a high-energy electromagnetic generator, a high-energy electromagnetic radio frequency rod, a multi-phase catalytic reactor and a solid-liquid separator; the high-energy electromagnetic generator is connected with the high-energy electromagnetic radio frequency rod through a wave guide, and the lower part of the high-energy electromagnetic radio frequency rod is inserted into the multi-phase catalytic reactor; and the discharge port of the multi-phase catalytic reactor is connected with the separator inlet of the solid-liquid separator through a pipeline. The high-energy electromagnetic technology, the multi-phase catalytic technology and the solid-liquid separation technology are coupled, so that the sludge treatment efficiency is improved, the treatment process is simplified, and the system operation energy consumption is reduced.

The invention discloses a device and a process for recovering yellow phosphorus in phosphorus sludge based on multistage flash evaporation continuous evaporation. The device comprises a pretreatment system, a drying-pyrolysis-evaporation integrated system and a product recovery and treatment system, phosphorus slurry is pretreated in the pretreatment system in a steam crushing and mixing mode and then enters the drying-pyrolysis-evaporation integrated system for precise temperature control through gradient electromagnetic heating, and the product recovery and treatment system is used for recycling the phosphorus slurry. And finally, the yellow phosphorus enters a product recovery and treatment system, so that the yellow phosphorus and phosphorus-free residues are recovered. According to the device and the process, phosphorus slurry can be uniformly fed in the whole process, phosphorus is evaporated thoroughly, and the yellow phosphorus recovery rate reaches 95% or above; the equipment sealing performance is good, and the risk of ignition caused by spontaneous combustion of yellow phosphorus is effectively avoided; the phosphorus sludge processing capacity reaches 0.5-1.0 ton per hour, continuous and stable operation can be performed for more than 720 hours, and the recycled residues are uniform in granularity and can be used for production of phosphate fertilizers, cement and the like, so that resource recycling is realized.

The invention discloses a method for removing refractory dyes in water by activating persulfate with iron-loaded biochar, and relates to the field of water treatment. The preparation method of the iron-loaded biochar comprises the following steps: taking red mud and bamboo leaves as raw materials, drying and grinding, mixing according to different proportions, carrying out pyrolysis carbonization in a muffle furnace in a nitrogen atmosphere at 800 DEG C, naturally cooling to room temperature, grinding and sieving, and finally obtaining the required iron-loaded biochar. The iron-loaded biochar prepared by the method has the advantages that waste can be treated by waste, the preparation cost is low, the persulfate catalytic activation performance is excellent, and the like. In addition, the material has certain magnetism, and the problem that heterogeneous catalysts are difficult to separate in practical engineering application can be solved.

The present application belongs to the technical field of sludge treatment, and particularly relates to a method for depolymerization and hot washing synergic treatment of poly-oil-containing sludge. The method comprises the following steps: (1) high-speed shearing to break the glue and depolymerize: mixing a glue-breaking agent with initial poly-oil-containing sludge and then high-speed shearing; (2) water stirring at a constant temperature: transferring the mixture after breaking the glue to a stirring pool, adding water and stirring, the water addition amount being 4-6:1 of the mass ratio of the initial poly-oil-containing sludge; (3) adding a hot washing agent under ultrasonic: adding a hot washing agent in the stirring pool, the hot washing agent being 1-3% of the mass of the oil sludge water mixture, ultrasonic auxiliary separation, ultrasonic power being 500-1000 W, and frequency being 25 kHz; (4) separation after standing and settling: standing until the mixture is divided into three layers; and (5) reprocessing of the solid bottom sludge layer: centrifugal separation of the bottom sludge. The process can improve the treatment efficiency of the poly-oil-containing sludge.

The invention discloses an oil sludge multistage hydrocarbon-based thermal washing system and method.The system comprises a landing oil sludge treatment unit, an aged oil sludge treatment unit and an emulsion and tank cleaning sludge treatment unit, and the landing oil sludge treatment unit comprises a first impurity removal unit, a first oil sludge pool, a uniform mixing device, a second impurity removal unit and a sludge collecting device; the aged oil sludge treatment unit comprises a second oil sludge pool, a mixing and stirring device and a separation unit, and the emulsified liquid and tank cleaning sludge treatment unit comprises a sludge collecting device, a sludge washing device and a separation unit. The oil sludge treatment system can treat falling oil sludge, aged oil sludge, emulsified liquid, tank cleaning oil sludge and the like at the same time, the treatment effect is good and stable, the system automation degree is high, pipeline adjustment is flexible and reliable, light solid residues, heavy solid residues and solid residues with large particle size differences in various oil sludge can be separated, and outsourcing or incineration is conducted according to field requirements.

The invention discloses equipment and method for preparing biochar through sludge pyrolysis carbonization, and relates to the technical field of biochar preparation through sludge, the equipment comprises a heating seat, a first supporting rod and a second supporting rod are fixedly connected to the heating seat, a base is fixedly connected to the first supporting rod and the second supporting rod jointly, and the heating seat can be electrified for heating; the heating base and the first supporting rod are jointly provided with a driving assembly, the heating base is internally provided with a discharging assembly, and the driving assembly is provided with an oxygen discharging assembly. According to the sludge pyrolysis device, the heat transfer efficiency in the sludge pyrolysis process can be improved by flatly laying sludge, a low-oxygen environment is achieved by injecting inert gas, and the energy consumption is reduced; therefore, the efficiency of converting the sludge into the biochar is improved, side reactions are reduced, products in the heating seat can be conveniently collected after the reaction, and a large number of products are prevented from remaining in the heating seat.

According to the equipment for treating the oil-based mud and the tank bottom mud through internal circulation pyrolysis, crushed materials are directly pyrolyzed through the pyrolyzing furnace, and complex separation and drying pretreatment are omitted; carbon-containing residues generated by pyrolysis are fed into the combustion chamber to be incinerated through the fire grate, and combustion heat energy is directly supplied to the pyrolysis process, so that external fuel consumption is greatly reduced; non-condensable gas generated by pyrolysis is introduced into the same combustion chamber as supplementary fuel, so that complete resource utilization of combustible byproducts is realized; incineration flue gas is treated by a deep purification system containing RTO catalytic oxidation, quenching and wet electric dust removal, it is ensured that tail gas reaches the standard to be discharged, and the produced solid is harmless reduced soil. The whole system stably operates under the coordination of an advanced PLC control system, is particularly suitable for treating various forms of oily wastes generated in an oil field, and improves the recovery efficiency of energy and resources while realizing pollution treatment.

This invention discloses an oil sludge extraction system, comprising a separation tower, multiple partition units, and an inlet pipe. The separation tower includes a feed section and an extraction section from top to bottom. The feed section has an inlet and an outlet. The inlet is for the oil sludge and extraction solvent to enter. The extraction section is used to extract light tar from the oil sludge and has a light oil outlet for discharging the light tar. The multiple partition units are spaced apart from top to bottom within the extraction section. Each partition unit includes multiple partition tubes spaced apart along a first direction and extending along a second direction. The inlet pipe is located on the separation tower and extends one end into the extraction section. The pipe wall of the inlet pipe has multiple spaced-apart vents for introducing heating gas into the extraction section. The oil sludge extraction system of this invention has the advantages of high oil yield.