174 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 relates to a feed coal preheating and drying and semicoke cooling coupled low-rank coal pyrolysis system and method. The low-rank coal pyrolysis system comprises a low-rank coal pyrolysis device, an air fan, an air secondary heat supplementing device and a cyclone dust collector, the low-rank coal pyrolysis device is sequentially provided with a coal direct drying section, a low-temperature pyrolysis section, a medium-high-temperature pyrolysis section and a semicoke indirect cooling section from top to bottom; the lower part of the semicoke indirect cooling section is provided with an air inlet, and the upper part is provided with a hot air outlet which is connected with the hot air inlet of the coal direct drying section through a hot air pipeline; and the hot air pipeline is provided with an air secondary heat supplementing device. In the feed coal drying and semicoke cooling process, air is adopted as carrier gas for heat exchange, sufficient recovery of semicoke heat is achieved, the recovered heat is used for drying and preheating the feed coal, and comprehensive utilization of the heat is achieved; the process characteristics of coal drying preheating, pyrolysis and semicoke cooling are fully considered, an economical and reasonable heat exchange form is adopted, the process is simple, the heat recovery efficiency is high, and the productivity of the pyrolysis device is high.

The invention relates to a multi-source heat carrier heat transfer coal pyrolysis reaction device, and relates to the technical field of multi-heat source complementary coal pyrolysis and gasification. Comprising a reactor, a spiral feeder, a solid product collector and a heat storage cavity, the interior of the reactor is divided into a pyrolysis cavity and a heat supply cavity through a steel plate; the spiral feeder is connected with the top of the pyrolysis cavity through a conveying pipe, and the solid product collector is connected with the bottom of the pyrolysis cavity through a pneumatic knife gate valve; and the pyrolysis cavity is connected with the bottom of the heat storage cavity through a pneumatic knife gate valve. The function that the reactor adapts to multi-source heat sources and high heat transfer flux is achieved through circular flowing of the high-temperature heat carrier; the heat transfer efficiency of the reactor can be effectively improved by regulating and controlling the heat transfer characteristic and the flowing state of the high-temperature heat carrier, and the pyrolytic reaction rate is increased.

The invention relates to the field of clean and efficient utilization and green low-carbon development of oil-rich coal resources, and discloses a laser pyrolysis oil-rich coal and gas real-time monitoring test device and method, and a coal sample is placed in a laser pyrolysis reaction bin; the input end of the laser pyrolytic reaction bin is connected with the output end of the gas carrying system, and the output end of the laser pyrolytic reaction bin is connected with the input end of the gas component analysis instrument; the input end and the output end of the laser pyrolysis reaction bin are each provided with a heating unit, and the gas control and detection assemblies are arranged at the input end and the output end of the laser pyrolysis reaction bin correspondingly. The signal input end of the laser pyrolysis and parameter detection unit group is connected to the signal detection end of the laser pyrolysis reaction bin; the components of gas products generated in the pyrolysis process can be analyzed in real time through the gas component analysis instrument; and guidance is provided for predicting gas components generated by coal pyrolysis in different temperature environments.

The invention relates to the technical field of low-rank coal pyrolysis, in particular to a swing type coke pusher for a semi-coke furnace and a working method of the swing type coke pusher. The swing type coke pushing machine comprises a linear driving device, a coke pushing frame and a material distributing and stirring device; a plurality of groups of distributing and shifting devices are arranged in one-to-one correspondence with discharge ports of the semi-coke furnace, and each group of distributing and shifting device consists of a guide body and a swinging shifting device; and the linear driving device drives the coke pushing frame to reciprocate so as to drive the swinging kick-out device to swing. Linear reciprocating coke pushing of a conventional coke pushing machine is changed into swing type coke pushing, the upper stock column of the coke pushing machine is small in pressure, the semi-coke stock column can be prevented from being cut during coke pushing, and semi-coke blocks cannot be damaged; compared with a mode adopting a conventional coke pusher, the semi-coke furnace is not limited by the width and length directions of the coke pusher any more, so that favorable conditions are provided for large-scale development of the carbonization furnace.

The invention provides a low-rank coal pyrolysis system and a control method thereof. The low-rank coal pyrolysis system comprises a through-flow type rotary dryer, a pyrolysis furnace, a dust remover, a waste heat recovery device, a venturi tower and a purification recovery device, and a dried coal outlet of the through-flow type rotary dryer is connected with a product inlet of the pyrolysis furnace; a raw gas outlet of the pyrolyzing furnace is connected with a gas inlet of the venturi tower through the dust remover and the waste heat recovery device in sequence, a flue gas outlet of the pyrolyzing furnace is communicated with a flue gas recovery port of the cross-flow rotary dryer to recover flue gas to dry raw material coal, and a tower bottom outlet of the venturi tower is connected with the ammonia water purification and recovery device to recover coal tar; and a coal gas outlet of the venturi tower is communicated with the coal gas purification and recovery device. According to the low-rank coal pyrolysis system provided by the invention, on one hand, waste heat of raw gas can be recycled, and on the other hand, raw materials can be conveniently dried, so that the pyrolysis efficiency is improved.

The invention relates to a device and a method for measuring radial strain and micro-deformation of pyrolysis of oil-rich coal. The device comprises a pressure chamber, and a pressure chamber inner cylinder is arranged in an inner cavity of the pressure chamber; a gas confining pressure chamber is formed between the outer wall of the pressure chamber inner cylinder and the inner wall of the pressure chamber; the annular heating sleeve sleeves the outer side of the pressure chamber; the displacement measuring structures are arranged on one side of the annular heating sleeve, and each displacement measuring structure corresponds to one protruding structure and is connected with the corresponding protruding structure; the stress applying structure is arranged at the lower end of the other side of the annular heating sleeve and is communicated with the gas confining pressure chamber; the temperature sensor is communicated with the gas confining pressure chamber; and the axial load loading mechanism is positioned above the pressure chamber. The radial strain capacity of the coal rock can be conveniently measured under the conditions of high temperature and triaxial stress loading, meanwhile, the radial micro-deformation of the coal rock is monitored, and the problem that the radial deformation is difficult to measure in the stress loading process of the coal rock under the high temperature condition is solved.

The utility model discloses a nitrogen stirring anaerobic hydrolysis device for coal pyrolysis wastewater, and relates to a coal pyrolysis wastewater hydrolysis device. The utility model aims to solve the problems that the existing anaerobic hydrolysis biological treatment device is poor in mixing effect and an anaerobic hydrolysis treatment system is easily damaged by adopting anaerobic biogas reflux stirring. The nitrogen stirring anaerobic hydrolysis device for the coal pyrolysis wastewater consists of a reflux water mixer and a hydrolysis device, a nitrogen stirring area, an anaerobic hydrolysis area, a mud-water separation area and a water outlet area are arranged in the hydrolysis device; nitrogen is adopted for stirring, so that the organic matter degradation efficiency of anaerobic hydrolysis microorganisms can be fully exerted, the negative influence of non-uniform stirring in the coal pyrolysis wastewater is avoided, and dissolved gases such as dissolved oxygen, H2, free ammonia, H2S and CO2 and part of volatile organic compounds in the wastewater are separated from the system; the inevitable harm caused by the inhibition effect on anaerobic hydrolysis microorganisms is reduced, and the dual effects of maintaining a good anaerobic hydrolysis treatment environment and reducing the treatment load are achieved.

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 relates to the technical field of oil-rich coal pyrolysis regulation and control, and discloses a microwave oil-rich coal pyrolysis real-time monitoring and intelligent regulation and control system and method.The structure comprises a microwave heating device, an oil-rich coal sample, a microwave temperature measuring unit, an oil-rich coal damage detecting unit, a weighing unit, a gas output unit, an oil gas detecting and collecting unit and an upper computer; an oil-rich coal sample is placed in the quartz pyrolysis tube, and efficient pyrolysis of the oil-rich coal is achieved in a microwave heating mode. The temperature of the oil-rich coal sample in the pyrolysis process can be regulated and controlled through the microwave temperature measurement unit, the thermal damage of the oil-rich coal sample can be effectively detected through the oil-rich coal damage detection unit, and the mass change of the oil-rich coal sample in the pyrolysis process can be monitored in real time through the weighing unit. And the pyrolysis monitoring accuracy of the oil-rich coal sample is greatly improved.

The invention belongs to the technical field of coal heat treatment, and particularly relates to a coal pyrolysis system. Heating pipes and raw gas collecting pipes are spirally and alternately arranged on the outer wall of a pyrolysis furnace; the pyrolyzing furnace sequentially comprises a preheating section, a pyrolyzing section and a cooling section from top to bottom; the heating pipe is provided with an air inlet, a coal gas inlet and a flue gas outlet, the air inlet is located at the bottom of the cooling section, the coal gas inlet is located at the bottom of the pyrolysis section, the flue gas outlet is located at the top end of the preheating section, the flue gas outlet is provided with an oxygen analyzer, and the oxygen analyzer is used for regulating and controlling the introduction amount proportion of air and coal gas in the heating pipe. And the oxygen content in the flue gas is always kept at 1.5%-2%. The preheating section, the pyrolysis section and the cooling section are all provided with thermometers, and the thermometers are used for monitoring the temperature of the preheating section, the pyrolysis section and the cooling section; a plurality of through holes are uniformly distributed in the contact part of the raw gas collecting pipe and the pyrolyzing furnace and are used for discharging the raw gas in the pyrolyzing furnace. The coal pyrolysis system can effectively improve the coal pyrolysis efficiency and reduce the heat energy loss.

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 invention discloses a protection method for low-temperature corrosion of high-sodium coal pyrolysis gas. The protection method comprises the following steps: cooling chlorine-containing high-temperature gas generated by high-sodium coal pyrolysis to 400-600 DEG C in a temperature control manner, and feeding the chlorine-containing high-temperature gas into a high-temperature dust remover for dust removal; feeding the dedusted chlorine-containing high-temperature coal gas into a multi-stage waste heat recovery device for temperature control condensation, wherein the temperature control range is 300-40 DEG C; in the temperature control condensation process, a continuous and compact tar liquid film layer is formed on the wall of a heat exchange pipe of the waste heat recovery device in an attached mode; through the formed tar liquid film layer, chlorine-containing high-temperature coal gas is isolated from being in direct contact with the wall of the heat exchange pipe, and corrosion of chlorine elements to the wall of the heat exchange pipe is avoided. The self-repairing tar liquid film is formed on the heat exchange surface through accurate temperature control, and the problem that metal equipment is corroded by a chlorine-containing medium is solved by combining sodium adsorption and chlorine blocking mechanisms.

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 utility model discloses a modular multifunctional coal pyrolysis device. The modular multifunctional coal pyrolysis device comprises a gas module, a gas activation module, a pyrolysis module, a catalysis module and a receiving module, wherein the gas module comprises a gas pipeline and a reactor end socket; the gas activation module comprises a heating furnace and a first reactor; the pyrolysis module comprises a heating furnace, a reactor II, a reactor seal head and a cooling coil; the catalysis module comprises a heating furnace and a third reactor; the receiving module comprises a refrigerator, a coal tar cooler, a coal tar collector and a pyrolysis dry gas conveying pipe. Compared with the prior art, other types of pulverized coal pyrolysis experiments such as gas activation and pulverized coal pyrolysis coupling research, gas activation and pulverized coal catalytic pyrolysis coupling research, gas activation and pulverized coal rapid pyrolysis coupling research and gas activation and pulverized coal catalytic rapid pyrolysis coupling research can be realized on the same set of device; the flexibility and the operation stability of the coal pyrolysis experimental device are improved, so that the conversion rate of pulverized coal is improved, and the problem that semicoke and a catalyst are difficult to separate is solved.

The invention relates to the technical field of coal pyrolysis, and discloses a coal pyrolysis method for comprehensively utilizing solar heat collection and photovoltaic power generation, which comprises the following steps: supplying energy to a water electrolysis unit through a photovoltaic power generation unit to generate hydrogen and oxygen, and supplying gas to gas hydrogenation and heating furnace combustion; heat is provided for the pyrolyzing furnace through the solar heat collecting system, semicoke generated by the pyrolyzing furnace is decomposed into hydrogen and coke through the coke tower, high-temperature pyrolyzing gas is dedusted through the high-temperature dust remover, and then tar and high-temperature coal gas are separated through the gas-liquid separator. High-temperature coal gas is hydrogenated by the hydrogenation reactor after waste heat is recovered by the heat exchanger to generate coal gas which is stored in the storage tank Solar heat collection, photovoltaic power generation and a coal pyrolysis technology are linked, dependence on fossil fuel can be reduced by using a clean solar heat collection system, meanwhile, greenhouse gas cannot be generated by pyrolyzing coal with solar energy as a heat source, and global warming can be slowed down. And in this way, the utilization efficiency of coal can be effectively improved, and air pollution and water pollution can be relatively reduced.

The present application belongs to the technical field of lignite treatment, and particularly relates to a method for improving lignite thermal conversion to produce high-value chemicals. In the present application, in the process of gasification, the catalytic active components in the carbide slag can have synergistic and catalytic effects with the minerals in the lignite. The treatment method provided by the present application can overcome the problems of low energy density, poor gasification efficiency, high tar yield and the like existing in the lignite gasification alone, effectively improves the carbon conversion rate per unit of coal, and greatly advances the reaction temperature zone. In the aspect of coal pyrolysis, the carbide slag can intervene in the pyrolysis reaction path, promote the cracking and conversion of macromolecular organic matter, and be helpful to the production of high-quality tar. The present application fully utilizes the catalysis of the carbide slag on the lignite for gasification or pyrolysis, effectively improves the carbon conversion rate per unit of coal, greatly advances the reaction temperature zone, and simultaneously can directionally regulate and control the production of high-value chemicals in the pyrolysis process, and produce high-quality tar.

The utility model belongs to the technical field of coal chemical industry, and particularly relates to a closed dry-method discharging device for a dry distillation process of silty coal. A closed type dry-method discharging device for a powder coal dry distillation process comprises a discharging bin support foundation, a second-section sealed type discharging bin, a first-section sealed type discharging bin and a powder coal dry distillation chamber tail are sequentially arranged above the discharging bin support foundation, the upper portion of the first-section sealed type discharging bin is fixedly connected with the powder coal dry distillation chamber tail, and the lower portion of the first-section sealed type discharging bin is fixedly connected with the powder coal dry distillation chamber tail. The lower portion of the first-section sealed discharging bin is fixedly connected with the upper portion of the second-section sealed discharging bin, a first-section discharging bin air-water adjusting pipe and a first-section discharging bin inner spraying pipe are arranged on the side wall of the upper portion of the first-section sealed discharging bin, and a second-section discharging bin air-water adjusting pipe and a second-section discharging bin inner spraying pipe are arranged on the side wall of the upper portion of the second-section sealed discharging bin. According to the utility model, by using a two-section air sealing and extinguishing structure, the production energy consumption can be reduced, and the quality of clean coal can be improved at the same time.

The invention belongs to the technical field of environmental protection equipment, and particularly relates to an anti-explosion heat-insulation coal gas high-temperature electric dust remover and a dust removal method. The invention also discloses a method. The device comprises a shell, an annular beam, a heat-insulating high-temperature-resistant explosion venting device, a heavy-load large-displacement sliding support, a dust hopper, a scraper dust conveying device, a dust collecting and conveying mechanism, a dust cleaning mechanism and a cathode and anode matching structure. The shell can bear explosion venting pressure impact of 0.1 MPa, and the shell is of an ultra-large shell structure with the maximum diameter phi of 15.8 m; the dry-process fine dust removal equipment for the low-rank coal pyrolysis gas adopts a high-temperature-resistant and heat-insulating design, can be operated under the condition that the inlet flue gas temperature is less than or equal to 450 DEG C, and the outlet temperature drop is less than or equal to 50 DEG C. The dry-process fine dust removal equipment for the low-rank coal pyrolysis gas adopts a mechanical tracking floating type rapping and sound wave ash removal combined ash removal design. The device meets high-temperature heat insulation operation, tar precipitation and adhesion are avoided, it is guaranteed that the dust removal efficiency reaches 99% or above at the high temperature, and the problem that the dust content of low-rank coal pyrolysis gas and tar recycled from the pyrolysis gas is high is solved.

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 invention discloses a device and method for pyrolyzing rich-oil pulverized coal to produce coal tar. The device mainly consists of a pyrolysis reactor, a multi-stage separator, an oil-gas separation unit, a semi-coke feed balancer, a preheated gas generator, etc. The device uses low-rank rich-oil pulverized coal with a smaller particle size and difficult to comprehensively utilize as raw material, burns part of its carbon-containing substances (semi-coke) to supply energy for the pyrolysis reaction, and then extracts coal tar through a multi-stage gas-solid separation system, and distinguishes semi-coke with different particle sizes; after the semi-coke is appropriately distributed, the fine-particle semi-coke enters the preheated gas generator to burn and supply energy for the system, part of the coarse-particle semi-coke is burned to supplement heat supply and at the same time serves as a heat carrier for internal circulation, and the medium-particle semi-coke is sent out of the device for uses such as gasification, power generation, and preparation of carbon materials. The present invention has a high tar yield, a high energy efficiency level, a lower requirement for the feed particle size range, and at the same time the overall structure of the device is simple and easy to operate, and has good application prospects.

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 belongs to the technical field of lignite treatment, and particularly relates to a method for improving lignite thermal conversion to produce high-value chemicals. According to the invention, in the gasification process, catalytic active components in the carbide slag and mineral substances in the lignite can generate synergism and catalysis effects. The treatment method provided by the invention can overcome the problems of low energy density, poor gasification efficiency, high tar yield and the like existing in independent gasification of lignite, effectively improves the carbon conversion rate of unit coal, and greatly advances the reaction temperature zone. In the aspect of coal pyrolysis, the carbide slag can intervene in a pyrolysis reaction path, so that the cracking and conversion of macromolecular organic matters are promoted, and the production of high-quality tar is facilitated. According to the method, the carbide slag is fully utilized to catalyze the lignite for gasification or pyrolysis, the carbon conversion rate of unit coal is effectively improved, the reaction temperature zone is greatly advanced, and meanwhile, high-value chemicals and high-quality tar can be directionally regulated and produced in the pyrolysis process.

The invention discloses a water-oxygen combined injection oil-rich coal pyrolysis device and method under stress loading and sound wave detection conditions, the device comprises a pyrolysis reaction kettle, a water injection system, a gas supply system, a pyrolysis product collection system, a sound wave detection system and a stress loading system, the inlet end of the cavity is provided with a water injection port and a gas injection port in parallel, and the outlet end of the cavity is provided with an oil-gas mixture outlet; the water injection system is communicated with the water injection port; the gas supply system is communicated with the gas injection port; the pyrolysis product collecting system is communicated with the oil-gas mixture outlet; the sound wave detection system is connected with the cavity of the pyrolytic reaction kettle; and the stress loading system is arranged at the end part of the oil-gas mixture outlet end of the cavity of the pyrolytic reaction kettle. The problem that an existing pyrolysis device lacks an in-situ simulation function and cannot determine the structural evolution of the oil-rich coal in the pyrolysis process is solved.

The utility model relates to the technical field of pyrolysis low rank coal, and particularly discloses a low rank coal pyrolysis device, which comprises a closed kiln body, a feeding pipe is connected to one side of the closed kiln body, a gas outlet pipe is communicated to the top of the closed kiln body, a discharging pipe is connected to the bottom of the closed kiln body, a high-temperature gas conveying element is installed through the closed kiln body, and a stirring assembly that rotates based on the high-temperature gas conveying element is arranged inside the closed kiln body; the high-temperature gas conveying element comprises a main pipe and a plurality of high-temperature gas pipes, gas outlet holes are arranged on the high-temperature gas pipes, and the gas outlet holes on different high-temperature gas pipes are not on the same plane; the stirring assembly acts on the low rank coal accumulated inside the closed kiln body, and the gas flow of the main pipe drives the stirring assembly to rotate, so that the device solves the problem that the low rank coal cannot fully absorb the heat of high-temperature gas due to the sticking and covering of the low rank coal inside the traditional closed kiln body.