56 results about "Coal pyrolysis" patented technology

The invention discloses a cyclone separation and moving particle bed coupled pulverized coal pyrolysis oil gas high-temperature dust removal system, and belongs to the technical field of coal clean utilization. The system comprises a cyclone separator, a fine filtration unit, a filter material cyclic regeneration unit and an intelligent control unit, the fine filtration unit comprises a particle bed, a particle bin is arranged at the top end of the particle bed, and a composite filter material layer is arranged on the particle bed; a dust-containing high-temperature oil gas pipeline and a pretreatment high-temperature oil gas pipeline are arranged at the top end of the cyclone separator, dust-containing high-temperature oil gas is introduced into the cyclone separator through the dust-containing high-temperature oil gas pipeline to be pretreated, and the pretreated dust-containing high-temperature oil gas is introduced into the particle bed through the pretreatment high-temperature oil gas pipeline to be finely filtered; and a coke breeze discharge pipe is arranged at the bottom of the cyclone separator. The invention is used for solving the technical problem of low gas-solid separation efficiency at high temperature caused by the adoption of a single filter material in the existing pulverized coal dust removal system.

The invention relates to the technical field of computer fluid dynamics, in particular to a coke oven carbonization chamber numerical simulation model based on a CPFD method, which comprises the following steps: carrying out structural grid division to generate a computational domain grid for solving a carbonization process; setting physical property parameters, boundary conditions, initial conditions and chemical reaction kinetic parameters of the coal particles and the gas phase; a CPFD multiphase coupling model is constructed; solving the CPFD multiphase coupling model to obtain dynamic evolution data of pyrolysis gas flow, coupling heat transfer and chemical reaction processes in the carbonization chamber; and outputting simulation results of a temperature field, a pressure field, a gas component concentration field and coal pyrolysis product distribution in the carbonization chamber. The method has the advantages that the particle swarm is regarded as a quasi-continuous medium for statistical description, and the optimal balance is ingeniously obtained between the calculation efficiency and the calculation precision, so that full-size and high-fidelity numerical simulation of dense gas-solid two-phase flow and reaction process involving millions of particles in an industrial-scale coke oven carbonization chamber becomes possible.

The invention discloses a biomass coke-based multifunctional coal pyrolysis catalyst and a preparation method thereof, and belongs to the technical field of preparation of coal pyrolysis catalysts. The preparation method comprises the steps of raw material pretreatment, pyrolysis pore-forming, activation synergism, metal loading, citric acid staged removal and atmosphere replacement, and specifically comprises the following steps: firstly, compounding, crushing and drying straw and wood biomass, and performing pyrolysis in an inert atmosphere to prepare a biomass coke precursor; then carrying out alkali metal activation, acid pickling and water washing to prepare an activated carrier with a high specific surface area; then, citric acid is used for assisting in loading a mixed solution of nickel nitrate and ferric nitrate, citric acid is removed by stages through air low-temperature pre-removal and inert gas medium-temperature deep removal, and the valence state of the metal active component is synchronously regulated and controlled. The prepared catalyst is low in citric acid residual quantity, can realize hydrodeoxygenation, tar cracking and anti-carbon deposition functions, is excellent in catalytic performance and low in cost, meets the requirements of low metamorphic coal pyrolysis volatile component upgrading, and is easy to industrially apply.

The invention provides a method for producing low-carbon olefins and aromatic hydrocarbons from inferior raw materials. The method comprises the following steps: performing hydrogenation upgrading on an inferior raw material, and performing fractionation on a product system obtained by hydrogenation upgrading to obtain first light distillate oil with the boiling point being less than or equal to 180 DEG C, hydrogenation upgraded oil with the boiling point being greater than 180 DEG C and less than or equal to 350 DEG C, and first tail oil with the boiling point being greater than 350 DEG C; mixing the hydrogenated upgrading oil and the heavy crude oil, carrying out catalytic cracking, and separating an oil-gas mixed product system obtained by catalytic cracking to obtain C1-C4 light olefins, second light distillate oil with the boiling point of less than or equal to 200 DEG C and second tail oil with the boiling point of more than 200 DEG C; and carrying out aromatic hydrocarbon extraction on the first light distillate oil and the second light distillate oil to obtain C6-C8 light aromatic hydrocarbons. According to the invention, production raw materials of low-carbon olefins and aromatic hydrocarbons can be expanded to heavy crude oil, shale oil and coal pyrolysis oil.

The invention discloses a dezincification process for steelmaking dust sludge of a rotary kiln, and belongs to the technical field of metallurgical solid waste resource utilization. According to the method, Fe2O3 in the dust sludge is preliminarily reduced into Fe3O4 and a small amount of FeO through the coke powder, H2 is generated through lignite pyrolysis to replace part of C for reduction, and efficient reduction and separation of zinc and iron in the dust sludge through carbon-hydrogen compounding in the rotary kiln are achieved. According to the method, the brown coal is excessively added, so that ferric oxide in the raw materials is fully reacted, meanwhile, oxygen is isolated by controlling the state of the kiln head, kiln slag is recycled after being cooled, FeO is prevented from being formed again, the ring forming phenomenon of the rotary kiln is relieved, and then the continuous working time of the rotary kiln is prolonged.

The utility model provides a pulverized coal pyrolysis, circulating fluidized bed boiler and gasification furnace integrated device which comprises a pyrolysis unit, a heat carrier heating unit, a powder selecting unit, a circulating fluidized bed boiler unit and a gasification unit, a solid phase outlet of the pyrolysis unit is independently connected with the heat carrier heating unit and the powder selecting unit, and a solid phase outlet of the gasification unit is independently connected with the circulating fluidized bed boiler unit. A smoke outlet pipeline of the heat carrier heating unit is connected with the powder selecting unit and the circulating fluidized bed boiler unit, an upper outlet of the powder selecting unit is connected with the gasification unit, and a lower outlet of the powder selecting unit is connected with the circulating fluidized bed boiler unit. According to the utility model, the particle size of the coke breeze after pulverized coal pyrolysis is graded, the graded coke breeze with smaller particle size is used for gasification, and the coke breeze with larger particle size is used as the fuel of the circulating fluidized bed boiler, so as to meet the requirements of different devices on the particle size of the coke breeze, effectively improve the utilization rate of the coke breeze, maximally utilize sensible heat of the coke breeze and realize efficient recycling of energy; and the treatment cost of downstream coke breeze processing is reduced, and efficient graded and quality-divided utilization of coke breeze is truly realized.

The application discloses a system for preparing liquefied natural gas by hydrogen supplementing of coal gas in medium-low temperature pyrolysis, which comprises a water electrolysis hydrogen production device, a methane synthesis device, a coal pyrolysis furnace, a coal gas reforming device, a pressure swing adsorption hydrogen extraction device and a deep cooling liquefaction device; the water electrolysis hydrogen production device is connected with an inlet of the methane synthesis device; a pyrolysis gas outlet and a semi-coke outlet of the coal pyrolysis furnace are connected with an inlet of the coal gas reforming device, and an outlet of the coal gas reforming device is connected with an inlet of the methane synthesis device; an outlet of the methane synthesis device is connected with an inlet of the pressure swing adsorption hydrogen extraction device, and the pressure swing adsorption hydrogen extraction device is connected with the deep cooling liquefaction device. The application realizes the collaborative conversion and integrated innovation of the medium-low temperature coal pyrolysis process and the water electrolysis hydrogen production process, develops and enriches product types and additional values, and has no technical barriers in equipment or devices, and is convenient for industrialization or large-scale application.

The application discloses a coal pyrolysis method and device for realizing in-situ ring-enriching modification of tar, and the method is as follows: block coal is pyrolyzed to obtain coal tar, semi-coke and pyrolysis gas; the coal tar and a ring-enriching modifier are subjected to in-situ ring-enriching modification reaction in a coal pyrolysis device under hydrogen to obtain coal tar; the in-situ ring-enriching modification reaction temperature is 200-250 DEG C, and the reaction pressure is 101-120 KPa.The coal tar obtained by the method is rich in polycyclic aromatic hydrocarbons and is suitable for being used as a processing raw material of high-density fuel.The device introduces the ring-enriching modification reaction on the basis of the coal pyrolysis, so that the coal tar is subjected to in-situ ring-enriching modification in the pyrolysis, and the obtained coal tar is more suitable for being used as the processing raw material of the high-density fuel.The pyrolysis device has the characteristics of low cost and low heat loss.

The present application relates to a kind of external combustion external heat type pulverized coal pyrolysis system and pulverized coal pyrolysis method, the external combustion external heat type pulverized coal pyrolysis system includes coal dry distillation device, flue gas heat exchange system and raw gas system;The flue gas heat exchange system includes external coal gas combustion furnace, high-temperature flue gas distribution system and flue gas mixing temperature control system;The raw gas system includes raw gas cooling gas collection system and raw flue gas purification system;The coal dry distillation device adopts the three-section structure of low-temperature pyrolysis drying section, medium-high temperature pyrolysis section and upgraded coal cooling section, and the waste gas produced by the combustion of coal gas in external coal gas combustion furnace is passed into medium-high temperature pyrolysis section and indirectly heat-transferred with fine coal, to realize the cascade pyrolysis of raw material fine coal;The import flue gas temperature of medium-high temperature pyrolysis section and low-temperature pyrolysis drying section is controllable, which is conducive to improving the service life of equipment and stabilizing product quality;The present application can stably and continuously realize fine coal pyrolysis, with good product quality and high investment return rate.

The invention discloses a simulation device for oil-rich coal in-situ negative pressure pyrolysis and oil gas collection, and aims to solve the problem that multi-condition synergistic effect is not considered in oil-rich coal pyrolysis in an existing laboratory. The system comprises a pyrolysis system, an environment and pressure supply system, a condensed oil gas extraction system, a gas extraction system and a tar quality analysis system, the pyrolysis system comprises a pyrolysis cabin, a heating system is arranged in the pyrolysis cabin, the environment and pressure supply system comprises an atmosphere environment supply system and an in-situ pressure supply system, the condensed oil gas extraction system comprises an oil gas collection assembly, the gas extraction system comprises a gas analyzer and a negative pressure extraction assembly, and the tar quality analysis system comprises a rotary evaporator. The heating system, the atmosphere environment supply system, the in-situ pressure supply system, the oil gas collection assembly, the gas analyzer and the rotary evaporator are all connected with the control terminal. The simulation of the pyrolysis process of the oil-rich coal under the multi-condition synergistic effect is realized by constructing multi-condition coupling oil-rich coal pyrolysis characteristic monitoring.

The invention discloses an oil-rich coal pyrolysis and gasification integrated efficient utilization method, and relates to the technical field of energy utilization, and the method comprises the following steps: S1, treating an oil-rich coal raw material, crushing and drying to make the water content of the oil-rich coal less than or equal to 5%, screening, and adding a catalyst at the same time; s2, the pretreated raw materials are conveyed to a pyrolysis unit for a pyrolysis reaction, oil gas and semicoke are generated in a fluidized bed at the temperature of 500-650 DEG C, part of pyrolysis gas is circulated to the fluidized bed to serve as a fluidizing medium, and meanwhile part of pyrolysis gas is circulated back to the pyrolysis unit; s3, semicoke generated by pyrolysis is conveyed to a gasification unit. The pyrolysis and gasification integrated efficient utilization method for the oil-rich coal shows remarkable advantages in multiple aspects, efficient cooperation of the whole process of pretreatment, pyrolysis and gasification, gas-solid separation, purification and waste heat recovery of the oil-rich coal raw materials is achieved through the highly integrated system design, and the resource conversion efficiency and the energy utilization rate are greatly improved.

This application relates to a method for identifying organic matter in high-salt coal chemical wastewater based on ultra-high performance liquid chromatography and high-resolution mass spectrometry (UHPLC). Specifically, it provides a slime remover, the active ingredient of which is prepared by purifying coal pyrolysis wastewater. This active ingredient contains the first fraction of the coal pyrolysis wastewater, which is prepared by the following method: (1) the coal pyrolysis wastewater is purified and extracted using SPE to obtain a purified product of the coal pyrolysis wastewater; (2) the purified product of the coal pyrolysis wastewater from step (1) is separated using HPLC, and the first peak product is collected to obtain the first fraction of the coal pyrolysis wastewater. The slime remover of this application reduces the emissions from coal pyrolysis waste treatment and simultaneously realizes the comprehensive utilization of coal pyrolysis products.

The application discloses a method for producing low-metamorphic coal into semi-coke for iron ore sintering, which comprises the following steps: washing low-metamorphic coal to obtain raw materials, and performing coal pyrolysis on the raw materials to obtain semi-coke particles, and screening semi-coke particles with a particle size of 12-15 mm for high sintering. The semi-coke produced by the method has an optimized microstructure and element composition, and its combustion performance and calorific value are closer to those of coke powder for sintering, so that the vertical sintering speed is basically unchanged before and after the process of replacing coke powder with semi-coke in a high proportion, thereby ensuring the performance of sintered ore, and the amount of nitrogen oxides generated is obviously reduced.

The application discloses a biomass and coal co-pyrolysis reactor, which comprises a reactor body, wherein the reactor body comprises a biomass pyrolysis cylinder and a coal pyrolysis cylinder which are communicated with each other, the biomass pyrolysis cylinder is connected below the coal pyrolysis cylinder, the cross-sectional area of the biomass pyrolysis cylinder is smaller than that of the coal pyrolysis cylinder, the bottom of the biomass pyrolysis cylinder is provided with a lifting gas inlet, the gas generated by the coal pyrolysis is suitable to enter the reactor body through the lifting gas inlet, the top of the coal pyrolysis cylinder is provided with a product outlet, at least one biomass feeding port is arranged on the side wall of the biomass pyrolysis cylinder, at least one coal feeding port is arranged on the side wall of the coal pyrolysis cylinder, and a plurality of heat accumulating radiation pipes are arranged in the biomass pyrolysis cylinder and the coal pyrolysis cylinder in a spaced mode. According to the biomass and coal co-pyrolysis reactor, hydrogen in the biomass can be easily transferred to the oil gas in the coal pyrolysis cylinder, and the biomass and the coal pyrolysis can reach a synergistic effect.

The invention relates to the technical field of semi-coke production, in particular to a semi-coke carbonization production process which comprises production equipment, and the production equipment specifically comprises a pneumatic drying and grading unit, a pulverized coal gasification unit, a lump coal pyrolysis unit, a moving bed dust removal unit and a high-temperature filter material circulation mechanism. By optimizing and improving the equipment and the process, pulverized coal and lump coal can be treated at the same time, the calorific value of coal gas and the quality of tar are improved, and pollution and production energy consumption are reduced.

The present application belongs to the technical field of coal processing and analysis, and provides a process method for coupling of coal pyrolysis and pulverized coal gasification, comprising: determining a pyrolysis reaction rate interval and a gasification rate interval; extracting carbon conversion efficiency under different char residence time in the coupling reaction of coal pyrolysis and pulverized coal gasification corresponding to the pyrolysis reaction rate interval and the gasification rate interval, constructing a char residence time-carbon conversion efficiency curve, identifying a carbon conversion efficiency inflection point, and linearly fitting the char residence time-carbon conversion efficiency curve to analyze and determine a minimum limited char gasification residence time, and combining the carbon conversion efficiency inflection point to determine a char gasification residence interval as a char residence time adjustment target of a next preset analysis period; in the next preset analysis period, according to the difference between the pyrolysis reaction rate interval and the gasification rate interval, performing dynamic update judgment and dynamic update operation of the char residence time adjustment target to ensure that the carbon conversion efficiency meets the standard and avoid energy waste.

The application provides a method and briquettes suitable for long-flame coal powder and tar residue mixed briquetting, and belongs to the field of harmful solid waste recycling. The method comprises the following steps: 1, obtaining tar residue by fractional precipitation of coal tar; 2, mixing the tar residue in step 1 with long-flame coal to obtain a mixture; 3, pressing the mixture in step 2 into briquettes; in step 1, the fractional precipitation comprises primary precipitation and secondary precipitation; the lower precipitate in the secondary precipitation is the tar residue. The application uses long-flame coal powder and tar residue after pyrolysis of long-flame coal tar as raw materials, does not need to use additional binders, and can form briquettes by mixing and pressing, thereby realizing harmless treatment and recycling of the tar residue.

The application provides a method for improving the yield of coal direct liquefaction oil by adding alkanes, and belongs to the technical field of coal direct liquefaction.The application provides a method for improving the yield of coal direct liquefaction oil by adding alkanes, which comprises the following steps: mixing coal samples, hydrogen-donor solvents, catalysts, catalyst auxiliaries and alkanes, and then performing a liquefaction reaction to obtain coal direct liquefaction oil.The application adjusts the hydrogen-donating capacity of the solvent by adding alkanes on the basis of the original hydrogen-donor solvent, so that the purpose of improving the yield of liquefaction oil is achieved; the method improves the solubility of hydrogen in the oil coal slurry on the one hand, and effectively inhibits the polycondensation reaction of coal pyrolysis free radicals by utilizing the cracking behavior of alkanes in the reaction process, so that the yield of liquefaction oil is significantly improved.

This invention discloses an interconnected coal pyrolysis system for a coal-fired power plant and a method for interconnected coal pyrolysis in a coal-fired power plant. The interconnected coal pyrolysis system for a coal-fired power plant includes: a coal-fired boiler unit, a coal pyrolysis unit, a flue gas-nitrogen heat exchanger, a nitrogen generator, and an emission system. The coal-fired boiler unit includes a coal-fired boiler with a flue gas outlet. The coal pyrolysis unit includes a pyrolysis industrial kiln and a staged cooling and separation system. The pyrolysis industrial kiln includes a pyrolysis feedstock inlet, a nitrogen inlet, and a volatile matter outlet. The volatile matter outlet is connected to the staged cooling and separation system. The flue gas-nitrogen heat exchanger has a flue gas heat exchange channel and a nitrogen heat exchange channel for mutual heat exchange. The flue gas heat exchange channel connects a first inlet and a first outlet, and the nitrogen heat exchange channel connects a second inlet and a second outlet. The first inlet is connected to the flue gas outlet, and the second outlet is connected to the nitrogen inlet. According to the embodiment of this invention, the interconnected coal pyrolysis system for a coal-fired power plant achieves improved coal utilization and increases energy efficiency.

The invention relates to the technical field of coal pyrolysis, and particularly discloses a stokehole coal topping method for a circulating fluidized bed boiler. The system of the method comprises the working procedures of catalytic pretreatment, hydrogen-rich pyrolysis, product separation, waste heat recovery, condensation refining, circulating regulation and control and the like. Wherein the composite catalyst adopts particles with a core-shell structure, the core layer is industrial waste residue, and the shell layer is mesoporous silica loaded with transition metal oxide. A hydrogen-rich reaction environment is established by controlling the ratio of hydrogen partial pressure to pyrolysis temperature, dividing wall heat exchange of high-temperature circulating ash is realized by utilizing a moving bed reactor, condensation separation of light tar is enhanced by adopting a supergravity environment, and a double-circulation system of process gas and light tar is established. According to the method, through multi-process collaborative optimization, accurate control over a coal pyrolysis reaction path is achieved, the selectivity of light tar is improved, gradient utilization of energy and cyclic efficiency improvement of materials are achieved at the same time, and the method has the advantages of being high in resource utilization rate and suitable for different coal types and boiler working conditions.

The invention discloses an N-doped carbon-based Co-Cu-MnO2 catalyst as well as a preparation method and application thereof, and belongs to the technical field of catalysts. The catalyst is prepared by taking ZIF-67 as a precursor template, synthesizing a Cu / Mn doped precursor through a liquid phase at room temperature and carrying out a nitrogen carbonization-hydrogen reduction two-step method, and the catalyst is marked as Co-Cu-MnO2 (at) NC. Through a dual regulation and control mechanism of carrier confinement and assistant cooperation, the performance of the catalyst is remarkably improved, and under the condition of high space velocity of 350 DEG C, the conversion rate of CO reaches 90% or above, the conversion rate of CO2 reaches 90% or above, and the selectivity of CH4 is nearly 100%; the activity retention rate reaches 90% after continuous operation for 1000 h, the activity retention rate is larger than or equal to 80% after 500 h in the 500 ppm H2S atmosphere, the catalyst is suitable for high-airspeed methanation reaction of coal pyrolysis gas, and the bottleneck problems that a traditional catalyst is prone to carbon deposition and poor in stability are solved.

The application discloses a method for preparing synthetic gas from semi-coke coke oven gas, and belongs to the technical field of coal pyrolysis dry distillation. The method dries and preheats raw coal, adopts external heating type dry distillation, and obtains raw coal gas and semi-coke semi-product. The raw coal gas is cooled and electrically captures tar to obtain semi-coke coke oven gas. The semi-coke coke oven gas can be used for cooling the semi-coke semi-product, and the semi-coke powder in the semi-coke semi-product is separated to obtain powder coal gas. The powder coal gas enters a gasification furnace and reacts with water vapor to obtain gasification coal gas. The heat of the gasification coal gas is recycled in sequence through dry distillation and drying preheating, and then dust removal is performed to obtain synthetic gas. The effective component content of the synthetic gas is higher than 95%, and the synthetic gas can be used for producing basic raw materials such as synthetic ammonia, methanol and low-carbon olefin, and can also be used as clean energy. The method does not generate waste gas and smoke, can fully utilize coal resources, and obtains high-quality semi-coke product, coal tar and synthetic gas.

The invention provides a system for coupling pulverized coal pyrolysis with a vertical semi-coke furnace and a method for preparing semi-coke, and belongs to the technical field of coal pyrolysis, and the system for coupling pulverized coal pyrolysis with the vertical semi-coke furnace comprises a pyrolysis furnace and the vertical semi-coke furnace. Wherein the pyrolyzing furnace is provided with a pulverized coal feed port, a powdery semi-coke discharge port and a pyrolysis gas outlet, and is suitable for pyrolyzing pulverized coal to generate powdery semi-coke and pyrolysis gas; the vertical semi-coke furnace comprises a lump coal feed port, a hearth, a lump semi-coke discharge port and a pyrolysis oil gas outlet, the hearth comprises a preheating section, a dry distillation section and a cooling section from top to bottom, a gas heat carrier channel is arranged in the dry distillation section, and a pyrolysis coal gas outlet of the pyrolysis furnace is connected with the gas heat carrier channel in the vertical semi-coke furnace through a pipeline.

The invention relates to a reaction device and a reaction method for gas-solid double-circulation pulverized coal pyrolysis. The reaction device comprises an ascending reactor, a settler, a continuous oxidation self-heating ascending tube reactor, an oxidant preheater, a heat carrier heater, a feeding unit, a gas-solid separation unit, an oil-gas separation unit and a circulating coal gas pipeline, an inlet end of the upstream reactor is connected with a bottom heat carrier outlet of the heat carrier heater, a pulverized coal outlet of the feeding unit and an outlet of the circulating coal gas pipeline, and an outlet end is positioned in the settler; a bottom coke breeze outlet of the settler and an outlet of the oxidant preheater are connected with the continuous oxidation self-heating ascending tube reactor, and an outlet end of the continuous oxidation self-heating ascending tube reactor is connected with a top inlet of the heat carrier heater; and a bottom coke breeze outlet of the settler is connected with a bottom inlet of the heat carrier heater through a circulating inclined pipe. The reaction device provided by the invention can realize equipment miniaturization, temperature control precision and operation stabilization, and improves the charking efficiency.

The invention relates to an overall preheating and starting system and method for a high-temperature oil-containing and dust-containing gas dust removal and filtration system for pyrolysis, and belongs to the technical field of coal pyrolysis. The overall preheating and starting system specifically comprises a pyrolysis device and a multi-stage dust removal filter connected with the pyrolysis device through a pyrolysis gas pipeline, and the outlet end of a multi-stage dust remover is connected with a dust remover outlet pipeline; a preheating and starting auxiliary device is connected to the multi-stage dust removal filter, is used for generating gas at a preheating section to integrally preheat the multi-stage dust removal filter and a connecting pipeline thereof, and is used for providing starting gas for the multi-stage dust removal filter at a starting section; the device not only can preheat a dust removal filtering system, but also can replace coal gas to serve as starting gas, so that the purposes of preheating the dust removal system before starting and serving as the starting gas during starting are achieved, and the starting difficulty is greatly reduced.

The utility model relates to a thermal insulation structure of a pulverized coal pyrolysis rotary kiln, which is characterized in that a plurality of layers of radiation heat dissipation pipe supports arranged at intervals are axially arranged on the inner wall of a rotary kiln cylinder, each layer comprises a plurality of radiation heat dissipation pipe supports arranged at intervals along the circumferential direction, and the radiation heat dissipation pipe supports of two adjacent layers are distributed in a staggered manner along the axial direction; a plurality of layers of anchoring nails arranged at intervals are further arranged on the inner wall of the rotary kiln barrel in the axial direction, each layer comprises a plurality of anchoring nails evenly arranged at intervals in the circumferential direction, each anchoring nail is sleeved with an arc-shaped heat preservation brick, and the arc-shaped heat preservation bricks are spliced and laid on the inner wall of the rotary kiln barrel. The end part of each radiation heat dissipation pipe bracket penetrates out of the arc-shaped heat preservation brick and is arranged in the rotary kiln cylinder body; castable is filled in the joints of the radiating pipe supports and the corresponding arc-shaped heat preservation bricks and the joints of every two adjacent arc-shaped heat preservation bricks. Stainless steel inner container pieces are arranged on all the radiation heat dissipation pipe supports in a sleeved mode, and all the stainless steel inner container pieces are spliced and laid on the surfaces of the arc-shaped heat preservation bricks.

The invention discloses a coal pyrolysis device. The coal pyrolysis device comprises a reaction tube, a feeding assembly, a heating assembly and a product collecting device, a low-temperature plasma high-voltage electrode is arranged in the reaction tube, a low-voltage electrode is arranged at the position, corresponding to the low-temperature plasma high-voltage electrode, of the outer portion of the reaction tube, a discharge area is arranged in the reaction tube, and a catalyst is arranged in the discharge area and used for assisting pulverized coal in activating hydrogen-rich gas in the pyrolysis process. The feeding assembly is communicated with the bottom of the reaction tube and conveys to-be-treated pulverized coal into the reaction tube for a pyrolytic reaction; the heating assembly is arranged on the periphery of the reaction tube and is used for heating the reaction tube; the product collecting device is connected with the top end of the reaction tube and is used for collecting gas-liquid-solid products generated by pyrolysis. According to the method, the catalyst assists the low-temperature plasma to activate the hydrogen-rich gas so as to strengthen fluidization and hydropyrolysis of the low-rank coal in situ, energy is provided for fracture of chemical bonds of the hydrogen-rich gas, the effective collision probability of active species and volatile free radicals is increased, and then the yield and quality of tar are improved.

The invention discloses an efficient rotating bed coal pyrolysis device and pyrolysis method. The device comprises a feeding mechanism, a first low-temperature pyrolysis mechanism, a second low-temperature pyrolysis mechanism and a heat supply mechanism, the heat supply mechanism comprises a heat supply box capable of generating heat, a first heat supply pipe and a second heat supply pipe, and the first low-temperature pyrolysis mechanism and the second low-temperature pyrolysis mechanism are fixed to the upper end and the lower end of the heat supply mechanism respectively. Each low-temperature pyrolysis mechanism comprises a heat preservation shell, a heat preservation inner barrel, an intelligent fire grate, a circulating flue and a flue gas pipeline, and the intelligent fire grate divides the interior of the heat preservation inner barrel into an upper pyrolysis cavity and a lower pyrolysis cavity and can turn over to achieve material transfer. The feeding mechanism can supply materials to the two pyrolysis mechanisms at the same time through the shunt design. The heat supply mechanism adopts an upper heat supply pipe and a lower heat supply pipe to convey heat to the two pyrolysis mechanisms. Through double-layer pyrolysis, flue gas circulation and intelligent material control, efficient pyrolysis and energy gradient utilization of low-rank coal are achieved, and the pyrolysis efficiency and the heat energy utilization rate are remarkably improved.

The invention discloses a pulverized coal pyrolysis device and method. The device comprises a kerosene slurry feeding unit, a preheating unit, a pyrolysis-coke generation unit and an oil / gas collecting unit, a raw material outlet of the kerosene slurry feeding unit is connected with an inlet of the preheating unit, an outlet of the preheating unit is connected with the pyrolysis-coke generation unit, a volatile component outlet of the pyrolysis-coke generation unit is connected with the oil / gas collecting unit, and a pyrolysis tar outlet of the oil / gas collecting unit is connected with the kerosene slurry feeding unit; according to the pulverized coal pyrolysis method disclosed by the invention, pyrolysis'oil-dust 'separation is associated with materials in the process of the method, and coal-oil slurry feeding avoids the'oil-dust' separation problem from the source; meanwhile, escape of volatile components in the pyrolysis process is enhanced, and the yield and quality of pyrolysis tar are improved; the pyrolysis method is simple, the catalyst is wide in adaptation range, and large-scale production is easy.