54 results about "Carbon product" patented technology

The application provides a self-powered heat type biomass conditioning pyrolysis method and device for co-production of high-value liquid and solid products, and belongs to the technical field of biomass processing. The device provided by the application mainly comprises a feeding module, a pyrolysis module, a condensation module and a self-powered heating module. Based on in-situ conditioning pyrolysis integration, the pyrolysis path is in-situ regulated by adding a trace amount of potassium metal salt, the self-powered electric heating molten salt precise temperature control technology is used, the conditioning pyrolysis process is uniform, stable and controllable, and the oil and carbon products can be simultaneously upgraded. After the reaction, the potassium salt catalyst does not need to be separated and can be directly used as high-value field-return biochar or subsequent activated raw material, and the quality of the biochar is further improved. The device has simple structure and precise temperature control, the oil and carbon products prepared have high quality, the catalyst does not need to be separated, and has wide application prospect.

The application relates to the technical field of carbon product processing equipment, and particularly discloses a carbon product continuous production method and device. The carbon product continuous production device comprises a workbench, a rotating disc rotatably connected to the middle part of the workbench, and a feeding mechanism, a drilling mechanism, a slotting mechanism, a threading mechanism and a discharging mechanism installed on the upper end face of the workbench; the feeding mechanism, the drilling mechanism, the slotting mechanism, the threading mechanism and the discharging mechanism are sequentially arranged around the rotating disc; and a plurality of clamps and adjusting mechanisms are installed on the rotating disc. The carbon product continuous production device is characterized in that a plurality of processing stations are arranged outside the rotating disc, the clamps are driven to rotate by the rotating disc, the positions of the clamps are adjusted, the states of the clamps are adjusted in cooperation with the adjusting mechanisms, the clamps can drive the carbon brushes to present different postures in different processing stations, the processing device is matched, the efficient continuous processing of the carbon brushes is realized, and the processing efficiency of the device is improved.

The processes disclosed herein are environmentally friendly technologies to produce biocarbon products with low water intensity as well as low carbon intensity. Some variations provide a low-water-intensity process for producing a biocarbon product, comprising: providing a starting feedstock comprising biomass and water; drying the starting feedstock to generate a dried feedstock and a first vapor; pyrolyzing the dried feedstock to generate hot solids and a second vapor; condensing the first vapor to generate a first condensed liquid having a first pH from about 1 to about 7; condensing the second vapor to generate a second condensed liquid having a second pH from about 1 to about 7; forming acid water comprising the first condensed liquid, the second condensed liquid, or a mixture thereof; washing and cooling the hot solids using the acid water, to generate washed, cooled solids; and recovering the washed, cooled solids as a low-water-intensity biocarbon product.

The invention discloses a processing method for improving the compaction density of capacitor carbon and the volume specific capacity of an electrode material, and the method comprises the steps: carrying out the grinding and shaping of an activated and pore-formed capacitor carbon raw material, and obtaining the spherical capacitor carbon powder; carrying out washing and roasting pretreatment on the sphere-like capacitance carbon powder to obtain pretreated capacitance carbon; mixing the pretreated capacitor carbon to obtain uniform mixed capacitor carbon powder; and calcining the mixed capacitor carbon powder for 0.5-2 hours at the temperature of 500-900 DEG C in a protective gas atmosphere to finally obtain a capacitor carbon finished product with improved compaction density and volume specific capacity. By accurately controlling particle size distribution and proportion of raw materials and combining a shaping process and a heat treatment process, accumulation gaps among capacitor carbon particles are reduced, and the compaction density is improved; the optimized particle morphology enhances the fluidity of the material and the forming strength of the electrode, so that the volume specific capacity of the electrode material is obviously improved.

The application discloses a coal-based gasification slag residual carbon backflow, circulating and reselecting extraction system and process, and relates to the technical field of coal chemical industry.The system comprises a circulating water pool, a water bubbling machine, a water selection pool, a particle size sorting machine, a sedimentation classifier, a desliming screen, an A-spiral group, a B-spiral group and a hot air pressure filter.The coal-based gasification slag residual carbon recovery rate reaches more than 98%, which is much higher than the residual carbon recovery rate level of less than 60% in the same industry.The water content of the extracted carbon is less than 40%.The coal-based gasification slag residual carbon backflow, circulating and reselecting extraction system and process can realize the water content of the carbon product after the extraction of the residual carbon in the coal-based gasification slag to be less than 40%, which is much higher than the water content level of 50%-70% of the extracted carbon in the same industry, and effectively solves the technical problem of the dehydration difficulty of the gasification fine slag.

The invention relates generally to a process for the preparation of a carbon product having a high degree of graphitization, comprising the steps of contacting a carbohydrate containing starting material with a molten salt wherein the molten salt comprises one or more hydrated salts selected from the group consisting of ZnCl2, MnCl2, FeCl3, AlCl3, MgCl2, CaCl2 and SbCl2 and carbonising the carbon containing starting material in mixture with the molten salt to form a carbon product by heating at temperatures between 100 and 300°C in a closed reactor system in an atmosphere free of oxygen (O2), forming the carbon product having a degree of graphitization DOG of at least 45% and separating the carbon product from the molten salt. The invention also relates to the carbon product obtainable by the process and to uses of the carbon product.

The application relates to a reactor and a method for producing a solid carbon product by a chemical reaction. The reactor comprises a catalyst, at least one inlet for supplying a reactant into the reactor, at least one outlet for discharging the product, and at least one magnetic or electromagnetic device and / or electric means to provide movement of the catalyst in the reactor.

The application discloses a novel rice hull pyrolysis reactor and relates to the field of biomass energy sources.The reactor comprises a reaction gas outlet section, a carbon particle screening section and a carbon storage section.The lower end of the reaction gas outlet section is connected to the upper end of the carbon particle screening section in a water seal mode.The lower end of the carbon particle screening section is connected to the upper end of the carbon storage section in a water seal mode.The reaction gas outlet section, the carbon particle screening section and the carbon storage section are arranged in cooperation.The reaction gas outlet section and the carbon storage section are supported by supports during use.The carbon particle screening section connects the reaction gas outlet section and the carbon storage section as an intermediate part.The three sections are connected in a sealed mode through an annular water tank, so that the three sections can be conveniently separated, thereby facilitating maintenance personnel to carry out maintenance.A driving motor drives a driving gear to rotate.The driving gear is engaged with a tooth groove formed in the end face of the second end of a tooth cylinder, so that the carbon particle screening plate can rotate.The carbon particle screening plate is uniformly provided with screening holes, so that carbon particles can uniformly fall and the quality of carbon products can be ensured.

The utility model discloses a methane cracking hydrogen production and carbon product continuous separation and purification device which mainly comprises a methane cracking reaction part for providing a reaction space for methane cracking reaction, a carbon product separation and collection part for realizing separation of a carbon product and metal catalyst impurities and facilitating collection of the carbon product, and a carbon product separation and collection part for realizing separation of the carbon product and metal catalyst impurities. The catalyst feeding part is used for timely supplementing a catalyst consumed in the reaction process, and the gas circulating part is used for recycling uncracked methane, improving the yield of hydrogen production through methane cracking and reducing methane gas waste. According to the utility model, methane is cyclically cracked in the molten metal catalyst, so that the methane cracking efficiency is improved; by collecting and purifying a carbon product, the operation cost is reduced, the hydrogen purity is improved, clean energy is generated, and carbon-free emission of energy is realized.

The utility model relates to the technical field of carbon product production, and provides a special carbon-graphite material high-efficiency pressurization mixing and kneading device which comprises a mixing and kneading machine body, a heating layer, a mixing reamer and a liftable gland, and a mixing and kneading machine heat preservation layer is arranged on the outer side wall of the mixing and kneading machine body and the outer side wall of the heating layer. According to the asphalt mixing and kneading machine disclosed by the utility model, air in coke fine powder is reduced through the vacuum-pumping system, the flowing resistance of asphalt is reduced, the penetration of the asphalt in coke pores is enhanced, and the filling degree and the bonding strength of the asphalt are improved. The compactness of the paste is improved by strong mixing and kneading under the action of a gland, and heat generated by friction is beneficial to asphalt flowing and polycondensation reaction, so that the coking value is increased. The S-shaped reamers are different from conventional reamers, cross-linking of the paste is intensified through a unique movement mode, strong convection is achieved, kneading is intensified through extrusion force generated by the included angle between the reamers and the pot wall, and the paste is more uniform.

The invention relates to a multi-raw-material self-adaptive closed-loop carbonization system, and relates to the technical field of biomass carbonization equipment. The system comprises a multi-raw-material self-adaptive feeding module, a double-barrel carbonization module, a tar catalytic cracking module, a dry quenching cooling module and an intelligent energy module. Raw materials are detected by the laser particle size analyzer and then enter the gap-adjustable packing auger through the partition feeding channel, and an eccentric wheel mechanism is regulated and controlled by the AI temperature control unit to achieve blade gap adjustment. An inner cylinder of the double-cylinder carbonization chamber conveys raw materials through a spiral blade, the inner cylinder can rotate through an eccentric wheel mechanism, and a waste heat exchange pipe on the inner wall of an outer cylinder recovers heat; after the nitrogen is subjected to gas-liquid separation in the cracking chamber, liquid tar is cracked into natural gas for reuse by a Ni / Al2O3 catalyst, and the nitrogen is subjected to closed-loop circulation; the cooling bin and nitrogen are cooperatively cooled through multiple layers of flow guide plates, and carbon products are classified through a vibration screening device. According to the invention, compatibility of multiple raw materials, self-supply of energy and zero emission of pollutants are realized, and the qualified rate of carbon products is increased to 95% or above.

The utility model relates to the technical field of carbon product production, and provides an automatic control device for mixed kneading smoke, which comprises a mixed kneading machine, a smoke valve and a PLC (programmable logic controller) system, the smoke valve is mounted on the mixed kneading machine, a smoke treatment system is connected outside the smoke valve, and a vacuum pressure gauge is further mounted on the mixed kneading machine. Different actual production requirements can be met, an operator can freely switch according to specific conditions, the device can be flexibly applied to various complex working conditions, the universality and operation flexibility of the device are greatly improved, and more diversified choices are provided for the production process; the automatic control function is achieved, an automatic mode or a self-adjusting mode can be selected, and intelligent control over the smoke valve in the mixing and kneading process is achieved. In the automatic control mode, the program can be paused, the opening degree of the air valve is restored to the initial value, an observation window can be conveniently opened in the mixing and kneading process to check the paste condition, and meanwhile the problem that mixing and kneading smoke escapes due to insufficient negative pressure is effectively solved.

The utility model discloses a carbon product raw material stirring device with eddy current, and particularly relates to the technical field of carbon product manufacturing, which comprises a stirring barrel, and a stirring component is mounted in the stirring barrel; the stirring assembly comprises a first motor, a first rotating rod is installed at the output end of the first motor, a first spiral blade is fixedly connected to the middle of the outer side of the first rotating rod, stirring blades are fixedly connected to the outer side of the bottom end of the first rotating rod, and a first gear is fixedly connected to the outer side of the top end of the first rotating rod. By arranging the stirring assembly, compared with the prior art, a first rotating rod is used for driving a first spiral blade and a stirring blade to generate two vortexes in the stirring barrel, and then a first gear is matched with a fluted disc to be meshed with a plurality of second gears to drive a scraping plate to scrape the inner wall of the stirring barrel; the relative movement speed and frequency among the raw materials are increased, the mixing efficiency and uniformity are improved, the convection and diffusion effects among the raw materials are enhanced, and the mixing stability is further improved.

The invention relates to a carbon product graphitization furnace, and relates to the technical field of graphitization furnaces, the carbon product graphitization furnace comprises an outer furnace body and a control console, an inner furnace body is arranged in the outer furnace body, a cover plate is rotatably connected to the outer furnace body, a heating coil used for heating the interior of the inner furnace body is installed on the outer wall of the inner furnace body, and the heating coil is electrically connected with the control console; the interior of the inner furnace body is used for containing carbon products, the inner furnace body is provided with an upper end cover and a plugging plate for plugging the upper end of the inner furnace body, a plurality of cooling pipes are arranged in the plugging plate in a penetrating mode, a conveying assembly used for conveying cold water into the cooling pipes is installed outside the outer furnace body, and a flow guide plate used for receiving condensate water on the plugging plate is arranged below the plugging plate. A heat insulation recycling box is installed between the outer furnace body and the inner furnace body, arranged below the flow guide plate and communicated with the flow guide plate. The carbon product heating device has the effect of absorbing steam generated in the carbon product heating process.

The invention discloses a collaborative purification system and method for carbon product roasting flue gas and desulfurization wastewater. The system comprises a wastewater supply and evaporation unit, a crystal salt adsorption and purification unit and a flue gas supply unit which are connected through pipelines. The method comprises the following steps: pre-treated desulfurization wastewater is atomized and sprayed into a full-evaporation spray cooling tower to be in direct contact with high-temperature roasting flue gas for evaporation, water vapor returns to a desulfurization system, generated micron-sized crystal salt enters an adsorption reactor along with the flue gas and is captured by a special adsorbent, and asphalt smoke in the flue gas is synergistically removed; and finally, gas-solid separation is realized through the bag type dust collector. According to the invention, waste is treated by waste, cooperative treatment of desulfurization wastewater zero discharge and flue gas purification is realized, the problem of crystalline salt trapping is solved, and the method has the remarkable advantages of high efficiency, economy and safety.

The invention discloses a real-time calculation method for converter steelmaking carbon emission. The method comprises the following steps: calculating process carbon emission; calculating the implicit carbon emission of the carbon-containing product; calculating the carbon emission of the consumed fossil fuel; calculating indirect carbon emission; the converter steelmaking carbon emission is calculated through a carbon emission calculation formula, and the calculation formula is shown in the specification. According to the method, real-time updating of carbon emission in the converter steelmaking production process is achieved, the problem of traditional lagged accounting pain points is solved, and enterprises are assisted to quickly respond to the carbon management and control target.

The embodiment of the present application discloses a kind of carbon product production formula adjustment method, device, system and readable medium, the carbon product production formula adjustment method includes: obtaining the initial particle size distribution data information of multiple particle size bins;Determine process formula based on the initial particle size distribution data information and initial production formula;According to the process formula, determine target production formula.In the embodiment of the present application, the process formula is determined by the initial particle size distribution data information and the initial production formula, and the target production formula is determined by the quantitative calculation of the actual particle size distribution based on the process formula, so that the numerical and accurate adjustment of the initial production formula can be realized when the particle size of the bin changes, and the production stability and formula versatility are improved.

The invention belongs to the field of production of carbon products, and particularly relates to a preparation method of a carbon-graphite mechanical sealing material, which comprises the following steps: grinding and proportioning raw materials: crushing petroleum coke and pitch coke aggregate coke, grinding into fine powder with D50 of 5-15 mu m by adopting a vertical mill, and grinding into powder with the particle size of 2-5 mu m; the preheating machine, the hot mixing machine and the cold mixing machine are adopted for conducting preheating, hot mixing and cold mixing operation respectively, and pressing of green bodies is conducted through cold isostatic pressing. Compared with a traditional single mixing and kneading mode, key parameters such as temperature and time of each stage can be controlled more accurately. For example, in the preheating stage, the dry material is preheated to 150-250 DEG C and is subjected to temperature equalization for 10-60 minutes, so that a good initial condition is created for subsequent hot mixing, the dry material can be more quickly and uniformly fused with liquid adhesive asphalt in the hot mixing stage, and the paste material is ensured to be fully mixed and kneaded; compared with traditional compression molding, the pressing pressure of cold isostatic pressing is higher, a more compact product structure can be obtained, and therefore higher product performance is obtained.

The application is suitable for the technical field of carbon product production and manufacturing, and provides a mobile granular carbon product collecting system applied to a carbon manufacturing plant, which comprises a vehicle body, a concave through groove is arranged on the front side of the vehicle body, an open-top collecting box is arranged on the rear side of the vehicle body, an elastic sealing mechanism is arranged on the open top of the collecting box, a side plate is arranged on the right side of the vehicle body, a track groove is arranged on the side plate, a driving frame sliding in the front-rear direction is arranged on the left side of the vehicle body, a driving motor connected with the driving frame is arranged on the vehicle body, and a collecting mechanism is arranged below the concave through groove and is in sliding connection with the driving frame and in sliding fit with the track groove. Compared with the prior art, the application does not need manual cleaning and collecting, does not increase the workload of the operating personnel, thereby avoiding the resistance and resistance of the operating personnel, and the application has high cleaning and collecting efficiency and good effect.

The utility model relates to the technical field of carbon product production, and provides an isostatic pressing forming green body volume shrinkage control device which comprises a cold isostatic pressing machine cylinder body and a mold barrel, the mold barrel is arranged in the cold isostatic pressing machine cylinder body, and a cold isostatic pressing machine end cover is arranged at the top of the cold isostatic pressing machine cylinder body. An overflow device is arranged on the right side of the top of the cold isostatic pressing machine end cover, a pressure measuring device is arranged at the top end of the right side wall of the cold isostatic pressing machine cylinder body, and a pressurizing device with flow meters and a pressure relief device with flow meters are arranged at the bottom end of the right side wall of the cold isostatic pressing machine cylinder body. The flow of the emulsified liquid can be measured during pressurization and pressure relief, and the PLC system calculates the volume shrinkage of a formed product through the flow of the emulsified liquid entering the cylinder body of the press. In the pressurizing process, the pressure relief valve is in a closed state, and the flow meter can be used for detecting the leakage condition of the pressure relief device. In the pressure maintaining process, the pressurizing device valve is in a closed state, and the flowmeter can be used for detecting the leakage condition of the pressurizing device.

The present application belongs to the technical field of garbage disposal, and relates to a rural garbage harmless and collaborative treatment system and method with comprehensive energy utilization, comprising a dead livestock and poultry processing module, a household garbage hydrothermal carbonization treatment module, a supercritical water oxidation treatment module and a wet straw treatment module. Through cooperation of the dead livestock and poultry processing module, the household garbage hydrothermal carbonization treatment module, the supercritical water oxidation treatment module and the wet straw treatment module, the dead livestock and poultry, the household garbage and the wet straw can be collaboratively and harmlessly treated, and meat and bone meal products, animal oil products, hydrothermal carbon products and biomass pellet products can be produced in the process, which on the one hand, avoids problems caused by landfill, protects the environment and avoids direct threats to the health of surrounding residents, and on the other hand, reduces the treatment cost of rural garbage, improves resource recovery rate and energy utilization efficiency.

The present invention relates to the field of carbon, and provides an electrically heated carbon roasting apparatus free of harmful gases and with zero carbon emissions, comprising metal material heating bodies. A carbon green product is placed between the metal material heating bodies; a metal material is energized to generate heat, so as to roast the carbon green product; the carbon green product is a carbon molded blank containing a binder such as pitch, a negative electrode powder containing volatile gases, and a carbonaceous material requiring dry distillation and carbonization; and after a filler is added between the metal material heating bodies and the carbon green product, the metal material is energized to generate heat, and the filler and the carbon product material are heated to 600°C-1200°C by means of conduction. The present invention uses clean electricity to heat the carbon product and the filler between the metal material heating bodies by means of the uniform heating of the metal material heating bodies. In this process, the emitted volatile gases are not diluted by combustion exhaust gas, so that the treatment is simple and recycling is possible.

The application discloses a coal-based hard carbon negative material of a sodium ion battery and a preparation method thereof, and the preparation method is as follows: coal powder and starch are uniformly mixed to obtain a coal-based hard carbon precursor; then the precursor is placed in a high-temperature and high-pressure device, the device is heated and pressurized, and the precursor is cross-linked and pre-carbonized, so that the cross-linking degree between the starch and the coal powder is greatly improved; then, the pre-carbonized material after treatment is secondarily crushed, after the crushing is completed, the material is placed in a high-temperature and inert gas atmosphere for carbonization, and finally, the coal-based hard carbon negative material with excellent performance is obtained. The coal-based hard carbon product interlayer distance can be obviously improved, the electrochemical performance of the coal-based hard carbon is improved, and the processing technology is simplified.

The utility model discloses a dipping sheath tool suitable for carbon-carbon products, which comprises a cylinder body, a vertical moving assembly and a handle, the cylinder body is fixedly connected with the vertical moving assembly, the vertical moving assembly is fixedly connected with a telescopic assembly, the telescopic assembly is fixedly connected with a horizontal moving assembly, the horizontal moving assembly is fixedly connected with the handle, and the handle is fixedly connected with the cylinder body. The horizontal moving assembly is fixedly connected with a mounting assembly, and the vertical moving assembly is composed of a first guide rail, a motor, a lead screw, a first sliding block and a limiting block; according to the utility model, through the cooperation among the vertical moving assembly, the telescopic assembly and the horizontal moving assembly, the opening and closing of the tool can be completed by using less manpower, and the working intensity of workers is reduced; and meanwhile, through cooperation of the cylinder body, the top plate and the mounting assembly, the impregnation liquid is prevented from being exposed in air in the machining process, deterioration caused by long-time exposure of the impregnation liquid is prevented, and the service life is prolonged.

The utility model relates to the technical field of carbon product production technology provides a kind of secondary grinding powder grading device of special graphite preparation, including grinding machine, feed bin, classifier one, classifier two, bin group one, classifier three, bin group two, cloth bag dust collector, bin group three, batching scale, mixer, fan and exhaust cylinder, grinding machine is communicated with feed bin and classifier one respectively, classifier one is communicated with classifier two, classifier two is communicated with classifier three, classifier three is communicated with cloth bag dust collector, the utility model uses the design of grinding machine and classifier one, classifier two, classifier three are used simultaneously, while supporting the increase of classifier and bin group, and screen separator can be additionally provided between classifier and bin group. This design makes the device can produce different particle size powder, and can further expand the particle size range, the addition of screen separator further improves the classification accuracy, so as to meet the diversified production needs of different particle size powder.

The application provides a kind of coal liquefaction refined pitch preparation of electric capacity carbon and its preparation method, the method includes the following steps: (1) alkali solution pretreatment template agent and coal liquefaction refined pitch slurry phase contact, and dry treatment is obtained to electric capacity carbon precursor;(2) the electric capacity carbon precursor is carried out pre-oxidation treatment: in nitrogen and air mixed atmosphere, the electric capacity carbon precursor is heated to 200-250 DEG C and is kept warm, then heated to 350-370 DEG C and is kept warm pre-oxidation;(3) the obtained pre-oxidized product is mixed with nitrogen-containing compound, phosphorus-containing compound, and carbonization activation treatment is obtained to the electric capacity carbon.The coal liquefaction refined pitch preparation electric capacity carbon method of the application uses coal liquefaction refined pitch as raw material, improves coal direct liquefaction resource conversion utilization efficiency, realizes high value-added utilization of coal resources;Technical route is simple, easy to enlarge, electric capacity carbon product is mainly microporous, pore structure is rich, has high specific surface area and high specific capacitance, and has higher economic benefit.

The invention relates generally to a process for the preparation of a carbon product having a high degree of graphitization in a high yield, comprising the steps of preparing a mixture comprising a carbohydrate or hydrocarbon containing starting material, a salt and a microwave or induction radiation absorbing material, preferably conductive carbon and wherein the salt comprises one or more salts selected from the group consisting of ZnCl2, MnCl2, FeCl3, AlCl3, MgCl2, CaCl3, SbCl2, and carbonising the carbon containing starting material to form the carbon product by heating with microwaves or induction radiation, preferably at temperatures between 200 and 1000°C in an atmosphere free of oxygen (O2), in an open reactor evaporating and removing water present or formed during carbonisation, converting the carbon containing starting material to the carbon product having a degree of graphitization of at least 45%, separating the carbon product from the one or more salts and preferably also post treating the carbon product to functionalise and / or further deoxygenate the carbon product. The invention also relates to the carbon product obtainable by the process and to use of the carbon product for the production of graphenes, carbon fibers and electronic applications.

The invention discloses thermal oxidation deodorization sludge drying and carbonizing equipment and a use method thereof, and relates to the technical field of sludge treatment and disposal. The system comprises a sludge bin, a delivery pump, a coarse crusher, a drying carbonization furnace, a sludge carbon bin, a tail gas condensing device, a thermal oxidation deodorization reactor, a wet electric precipitator, an induced draft fan and a chimney which are connected in sequence. The core of the invention is to provide a'sludge carbonization-thermal deodorization 'integrated solution, wet sludge with the moisture content of 80% is converted into an odorless and stable sludge carbon product with the moisture content of 10-15% through a sludge drying carbonization furnace, and meanwhile, odor generated in the carbonization process is directly introduced into a thermal oxidation deodorization reactor to be completely decomposed under a high-temperature condition; and the tail-end wet-type electric dust remover purifies residual pollutants, so that ultra-clean emission is realized. According to the method, sludge reduction and stabilization treatment can be achieved, the problem of odor overflow in the sludge treatment process is solved, and obtained sludge carbon can be subjected to resource utilization through blending combustion or biochar returning to the field and the like.

The utility model relates to the technical field of carbon product crushing equipment, in particular to a roll crusher with a linkage screening structure, which is characterized in that three fixing frames are arranged above an upper port of a shell in a front-back arrangement manner, a plurality of screening grids are arranged between two fixing frames on the rear side, the front ends of the screening grids are fixedly arranged on the middle fixing frame, and the rear ends of the screening grids are fixedly arranged on the middle fixing frame. The rear end of the screening grating is fixedly arranged on the fixing frame on the rear side, the multiple feeding gratings are arranged between the two fixing frames on the front side, the front ends of the feeding gratings are fixedly arranged on the fixing frame on the front side, the rear ends of the feeding gratings are fixedly arranged on the fixing frame in the middle, and the feeding hopper is erected on the right sides of the feeding gratings. Through the arrangement of the grid-shaped barrel type screening structure, raw materials can be screened through rotation, oversized raw materials can be screened out and reserved, and screened waste materials can be independently discharged by lifting the barrel-shaped structure, so that it is guaranteed that all the raw materials entering the pulverizer are of the machinable size.