88 results about "Brown coal" patented technology

The application discloses a coal-based solid waste disposal system and method for chemical looping combustion coupled with lignite boiler peak shaving, and the system comprises an electrolytic water device, an air reactor, a fuel reactor, a gas mixer, a condenser, a semi-gasification stable combustion burner and a boiler body, etc.; the method utilizes the redundant power generation of wind power generation and photovoltaic power generation to electrolyze water in the electrolytic water device; H2 is introduced into the fuel reactor to react, so that the oxide carrier is reduced into a metal carrier, and water vapor is generated; the metal carrier in the air reactor is subjected to an oxidation reaction with air, so that the metal oxide is generated and a large amount of fuel is released; the gasification background gas is introduced into the air reactor to be preheated, and then is mixed with the water vapor generated in the fuel reactor, and finally the semi-coke powder in the semi-coke powder system is introduced into the semi-gasification stable combustion burner, and then is introduced into the furnace through the stable combustion burner nozzle to be stably combusted; part of the water vapor generated in the fuel reactor is introduced into the condenser to be condensed, so that condensed water is obtained.

The invention discloses a classified grouting reinforcement method for a wind oxidation zone of a lignite mining roof, and relates to the technical field of coal mining, the method comprises the following steps: obtaining the average wind oxidation zone thickness, the water inflow and the average natural gamma value covering each weighting step section on a lignite mining working surface to be mined; according to the average wind oxidation zone thickness, the water inflow and the average natural gamma value corresponding to each weighting step section, a set number of drilling points are determined on the lignite mining working face; the drilling leakage amount of each drilling point is obtained; based on the data of each drilling point, determining the function relationship between the drilling leakage amount and the average wind oxidation zone thickness, the water inflow amount and the average natural gamma value; according to the function relation, the drilling leakage amount of each weighting step section is determined; dividing the drill hole leakage amount of each weighting step section into a plurality of grades of slurry eating areas; and different grouting technologies are adopted for grouting reinforcement of the slurry eating areas of all the grades. Top plate accidents can be reduced, grout leakage is reduced, in addition, the grouting cost is reduced simply.

The invention discloses a coking device for lignite blending, and relates to the technical field of coal coking, the coking device comprises a coking furnace, the top of the coking furnace is fixedly provided with a box body, the two sides of the box body are both provided with storage boxes, the bottoms of the storage boxes are fixedly provided with hollow cylinders, and the sides, away from each other, of the two hollow cylinders are both fixedly provided with first servo motors; output shafts of the first servo motors penetrate through one side of the hollow cylinder and are fixedly provided with first augers; the two independent first servo motors are used for driving the augers at the bottom of the storage box respectively, the conveying amount of lignite and other coal types can be accurately controlled by adjusting the rotating speed of the motors, the deviation of the coal blending proportion is greatly reduced, it is ensured that the mixed coal meets the preset formula requirement all the time, and the coal blending efficiency is improved. Coke quality fluctuation caused by proportion imbalance is reduced from the source, stable performance of subsequent coking products is guaranteed, and the coal crushing and mixing effect is improved.

The invention discloses an internal and external simultaneous heating type low-temperature dry distillation system and process, which are suitable for 0-30mm set particle solid raw materials (the low-rank coal is 0-50mm) and can be applied to the fields of oil shale dry distillation, lignite upgrading and the like, and products comprise coke, semi-coke, tar and dry distillation gas. The core of the system is a horizontal rotary sleeve type dry distillation furnace, a drying bin and a dry distillation bin which are coaxial are arranged in the horizontal rotary sleeve type dry distillation furnace, and an annular space is formed by an outer cylinder and an inner bin. High-temperature hot flue gas in the annular space is subjected to radiation and conduction heat transfer, and hot slag is backmixed according to the proportion of 1 / 4-1 / 3 of materials in the bin, so that direct heat transfer is achieved; heat energy is utilized in a gradient mode, waste heat is subjected to gas-solid heat exchange, and fluid is mixed and recycled. According to the process, drying, destructive distillation and combustion are integrated in one furnace, energy output loss of a traditional process is avoided, generation of nitric oxide is inhibited through low-oxygen combustion, and moisture removed through drying can be recycled. The heat efficiency is high, integration is high, the operation and maintenance cost is low, and efficient resource utilization of low-quality solid raw materials is achieved.

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 invention relates to the technical field of sodium ion battery negative electrode materials, in particular to a hard carbon negative electrode material as well as a preparation method and application of the hard carbon negative electrode material. And the compaction density, the first efficiency and the capacity of the hard carbon negative electrode material are obviously improved. In addition, the technological process is simple, the usage amount of highly corrosive reagents (such as HF and NaOH) is reduced, low-rank coal (such as lignite and bituminous coal) can be compatible, and the raw material cost is reduced.

The invention provides a system and a method for upgrading lignite by using flue gas of a coal-fired power plant. The system for upgrading the lignite by using the flue gas of the coal-fired power plant comprises a lignite upgrading device which is provided with a wet coal inlet, a dry coal outlet, a first flue gas inlet, a first flue gas outlet and a first water vapor outlet; a flue gas outlet of the pulverized coal boiler is connected with the flue, the flue is provided with a first flue gas connector, and the first flue gas connector is connected with a first flue gas inlet of the lignite upgrading device through a first pipeline; an inlet of the separator is connected with a smoke outlet of the lignite upgrading device, a second smoke outlet of the separator is connected with an inlet of the booster fan, and an outlet of the booster fan is connected with a smoke exhaust connector of the flue through a second pipeline; provided is a dry lignite collecting device. Therefore, according to the system for upgrading the lignite by using the flue gas of the coal-fired power plant, the lignite can be conveniently upgraded, the energy waste is reduced, and the safety is high.

The invention discloses a theoretical correction-based fire prevention and extinguishing comprehensive control method for a strip mine with an extremely thick lignite layer, and belongs to the technical field of mine safety. Comprising the following steps: S1, calculating a theoretical minimum coverage thickness based on a gas seepage theory, and correcting in combination with fracture development, material water sensitivity and long-term high-temperature stability factors to obtain an engineering application recommended thickness; s2, constructing an air-ground-fixed integrated three-dimensional monitoring and early warning system, monitoring the deviation of the actual coverage state relative to the recommended thickness, and giving an early warning; s3, on the basis of the monitoring information, implementing treatment for sedimentation fractures, channel blocking of a key partition interface and combustible material management; and S4, starting graded emergency response according to the early warning grade, and executing fire control and extinguishment, regional isolation and post reinforcement. According to the method, the scientific coverage thickness is determined through combination of theoretical calculation and engineering correction, closed-loop management of monitoring, early warning, prevention and control, disposal and review is formed, active prevention and systematic control over the spontaneous combustion risk of the coal seam are achieved, and scientificity, accuracy and economical efficiency are achieved.

The invention belongs to the technical field of yield increase of methane gas by anaerobic degradation of lignite, and provides a method for producing methane gas by anaerobic degradation of lignite by mixing exogenous bacteria and straws. According to the method, temple river coal seam water enrichment culture flora is used as exogenous bacteria, Inner Mongolia Shengli lignite is used as a gas production substrate, the same culture medium and bacterial liquid are added, and the influence of coal, straw and addition of the coal and the straw on the methane gas production rate is analyzed. After two months of monitoring, the net methane yield of a straw and coal (1: 1) group is 84.28 mL, and the net methane yield is 28.09 mL / g; the net methane yield of a coal group is 33.15 mL, and the net methane yield is 11.05 mL / g; the gas production rate of the straw and the coal as the substrate is more than two times that of the single coal as the substrate. According to data calculation of bottled experiments, the daily gas production rate of the exogenous bacteria for degrading the coal and the straws is 0.47 m < 3 > / t / d. The exogenous bacteria and the straws jointly act on the lignite, so that the gas volume and the gas production rate are obviously increased. And the generated methane can also be used as a green energy source in other fields.

The present disclosure provides a kind of integrated ejector lignite drying supercritical CO2 power generation system and method, by coupling deeply with supercritical CO2 coal-fired power generation system through ejector lignite drying system, utilize high-temperature high-pressure CO2 working substance of high-temperature regenerator outlet to eject low-temperature low-pressure CO2 working substance of low-temperature regenerator outlet, form the medium-temperature medium-pressure working substance matching with the temperature and lignite drying demand, drive rotary drum dryer to carry out pre-drying treatment to high-moisture lignite;At the same time, the water vapor released in drying process is condensed to recover condensate water, and low-moisture lignite after drying is sent into boiler for combustion.The cold source loss is significantly reduced, and the system comprehensive energy efficiency, combustion efficiency and unit power supply efficiency are improved.In addition, the condensate water generated in the process of lignite drying is recovered, which reduces the water consumption of the unit, and energy efficient utilization and resource saving are considered.

The application discloses a production process of potassium fulvate of mineral origin, which uses weathered coal and / or lignite as raw materials, and comprises the following steps: raw coal slurry preparation, ultrasonic-assisted weak-alkali low-temperature closed-loop extraction, double-stage centrifugal separation and solar drying system drying to prepare high-activity potassium fulvate of mineral origin. The extraction is carried out at 45-55 DEG C, pH 11-12, ultrasonic power 3-5 kW and frequency 25-30 kHz for 30-60 min, and the extraction rate of fulvic acid is 65%-75%; the solar drying system is configured with an automatic turning and throwing system, a circulating ventilation system and a meteorological linkage system, and the crude liquid with a water content of 75% is dried to 15% in the whole process without waste water and carbonization. The application has the advantages of high extraction rate, low energy consumption, short time, high product activity, high small molecule content, no residue in full water solution at 25 DEG C and suitability for large-scale clean production.

The application discloses a lignite soft rock broken surrounding rock anchor net cable coupling supporting device and a construction method, and belongs to the technical field of coal mine roadway supporting. The device comprises a coupling anchoring assembly, a cooperative table protecting assembly and a connecting conducting assembly. The coupling anchoring assembly comprises an anchor rod, an anchor cable and a coupling anchoring sleeve pipe, the anchoring end of the anchor rod is provided with an anchoring tooth block, the anchoring end of the anchor cable is provided with an anchor head, and the coupling anchoring sleeve pipe connects the anchor rod and the anchor cable. The cooperative table protecting assembly comprises a flexible protective net, a rigid supporting plate and a buffer pad layer, and the three are sequentially attached and arranged, and the anchor rod and the anchor cable pass through the three. The connecting conducting assembly comprises a coupling connecting sleeve, a conducting pull rod and an adjusting screw rod, the coupling connecting sleeve is sleeved outside the coupling anchoring sleeve pipe, and adjacent coupling connecting sleeves are connected through the conducting pull rod. The anchor rod, the anchor cable and the protective net are connected into a whole through the connecting conducting assembly, a three-stage supporting system is formed, and large deformation of soft rock is effectively resisted.

The application discloses a carbon-coal composite functional material and a preparation method and application thereof. The preparation method of the carbon-coal composite functional material comprises the following steps: 1) pulverizing and sieving lignite and straw; 2) pyrolyzing the straw obtained in the step 1) under an inert atmosphere to obtain a straw biochar material; 3) washing the straw biochar material obtained in the step 2) to neutral with deionized water, air-drying and crushing; and 4) mixing the straw biochar material obtained in the step 3) with the lignite obtained in the step 1) and pyrolyzing under low temperature and oxygen, so that the carbon-coal composite functional material is obtained. The carbon-coal composite functional material is applied to adsorb substances containing NH3 / NH4 + . The modified carbon-coal composite material has the advantages of large specific surface area, dense pore, high humic acid content and rich oxygen-containing functional groups, and has remarkable effects on absorbing NH4 + .

This invention relates to the field of power engineering control technology, and in particular to an intelligent coal blending system and method. It includes: a coal type identification unit for identifying the type of coal supplied to the coal mill; wherein the supplied coal types include lignite, bituminous coal, and anthracite; a unit calculation unit for real-time acquisition of the calorific value K and sulfur content I of the coal; and an intelligent blending unit for real-time adjustment and control of the amount of bituminous coal in the coal mill's supplied coal types based on the calorific value K and the sulfur content I. This invention, through intelligent, automated, and real-time adjustment and control of the amount of bituminous coal in the blended coal, and by using the calorific value and sulfur content as parameters for adaptive correction, effectively improves the complete combustion of coal to achieve the required energy supply and reduces pollution generated by coal combustion.

The present application provides a kind of dual-cycle combustion stabilizing system of mixed combustion boiler, belongs to coal mixed combustion technical field.The system, including lignite dryer, condensate device, poor lignite conveying device, intelligent analysis device, heat exchanger, bypass flue air blower, coal mill and SCR denitration device.Intelligent analysis device controls bypass flue air blower and extracts excess flue gas volume and is transported to heat exchanger.And control bypass flue air blower and transport the excess flue gas volume after heat exchange to coal mill, to supplement the air volume output to coal mill, reach the effect of flue gas circulation, improve the air volume transported to coal mill.At the same time, heat exchanger uses condensate heat exchange to obtain high-temperature steam, and transports high-temperature steam to lignite dryer.Lignite dryer uses high-temperature steam to dry poor lignite to obtain low-temperature condensate, and transports low-temperature condensate to condensate device, to achieve the effect of water circulation.Thereby realize lignite upgrading, improve the purpose of combustion efficiency, and have protective effect to boiler and auxiliary machine.

The invention discloses a communication type boiler powder adding combustion system and method. The communication type boiler powder adding combustion system comprises a hearth, a flue, a solid combustor, a gas combustor, a raw coal pulverizing device, a lignite pulverizing device and a biomass pulverizing device, and the flue is communicated with the hearth; the solid burner and the gas burner are both arranged in the hearth; the raw coal pulverizing device, the lignite pulverizing device and the biomass pulverizing device are respectively communicated with the gas burner and the solid burner. Different types of fuels are used, the types and proportions of the fuels are adjusted according to the requirements of a power grid, and the more flexible peak regulation capacity is provided. Biomass is a renewable energy source, and carbon dioxide generated by combustion of the biomass can be absorbed in the growth process, so that carbon neutralization is realized. The biomass powder is used as fuel, so that the overall carbon emission can be reduced. By accurately controlling the mixing proportion of the fuel and the combustion gas, the combustion process can be optimized, the combustion efficiency can be improved, and energy waste can be reduced.

The application discloses a method for preparing humic acid by graded oxidative depolymerization of lignite, comprising the following steps: weighing lignite, adding hydrogen peroxide for oxidation pretreatment, filtering and vacuum drying to obtain preliminarily oxidized lignite, named as PTSL; using a mixed gas of ozone and oxygen to perform deep oxidation experiment on the obtained PTSL, and after the oxidation reaction is completed, centrifugal filtration is performed on the mixture, and a liquid sample is collected. The lignite is subjected to graded oxidative depolymerization in a graded oxidation mode, the weak bridge bond and side chain structure in the coal are first oxidatively broken by the green oxidant hydrogen peroxide without damaging the aromatic ring structure, then the lignite is further oxidized by the strong oxidant ozone to gradually damage the polycyclic aromatic hydrocarbon structure in the coal, and step-by-step oxidative depolymerization of the organic matter in the coal is realized. The method can improve the organic matter conversion rate and the humic acid yield of the lignite and reduce the impurity content in the humic acid.

The invention provides a fan mill lignite boiler plasma ignition method, system and related device, the fan mill lignite boiler plasma ignition system comprises a plasma pulverized coal burner and a plasma generator, and the plasma generator is obliquely inserted and installed on the side face of a spray pipe of the plasma pulverized coal burner in the radial direction; the technical problem that the plasma generator cannot be axially installed due to the fact that the arrangement positions of the fan mill pulverized coal pipeline and the combustor are limited is effectively solved, and the plasma generator is particularly suitable for the special structure that the distance between a pulverized coal elbow and a combustor spray pipe is long and the height is inconsistent in a fan mill pulverizing system.

The invention provides a preparation process of a feed additive organic trace humic acid iron (complex) chelate, the specific flow comprises coal (peat, lignite and weathered coal) mineral separation, coal mine crushing and oxidation chain scission, coal water slurry preparation, fine selection and impurity removal, biological acidification reaction, enzymatic hydrolysis reaction, chelation reaction and drying granulation, and the complex (complex) rate of the prepared complex (complex) is greater than 95%. The invention solves the technical problems that the existing humic acid iron product is prepared by physical modes such as mixing, roasting, washing, concentration crystallization and the like or chemical reaction and is low in utilization rate, and solves the technical problems that in the prior art, the pH value of gastrointestinal tracts is regulated only by utilizing acidity of ferric sulfate or humic acid is utilized to promote feed activation and absorption, regulate intestinal health and the like; and the problem that the iron absorption rate is improved by an iron combination form is not fundamentally solved.

The invention belongs to the technical field of lignite drying, and discloses a waste heat recycling system and method in the lignite drying production process, and the system comprises a tower body, a feed port, a discharge port, an air inlet pipe, an air outlet pipe, a heat dissipation pipe, a moisture exhaust fan and a belt elevator; the top of the tower body is provided with a feed port with a switch door, and the bottom is provided with a discharge port with a valve; an air inlet pipe is arranged in the tower body above the discharge port, and an air outlet pipe is arranged in the tower body below the feed port; a plurality of heat dissipation pipes are communicated between the air inlet pipe and the air outlet pipe; the dehumidifying fan is mounted at the top of the tower body and is used for exhausting water vapor generated in the tower body; the belt elevator is arranged on one side of the tower body, and a discharging opening of the belt elevator is located over the feeding opening; moisture in the feed coal is evaporated under the heat conduction of the heat dissipation pipes and the heat dissipation fins, and is discharged out of the tower body under the negative pressure action of the moisture removal fan. Static material baking is achieved, material loss is reduced, the finished product recovery rate is increased, tail gas emission is reduced, and waste heat resources are fully utilized.

The invention discloses a coal collecting device in coal mining, relates to the technical field of coal collecting machinery, and solves the problem that lignite is difficult to classify and store according to types of coal during collection. The coal collecting device in coal mining comprises a lignite treatment box and a lignite conveying box, the lignite conveying box is installed above an opening in the top of the lignite treatment box, a supporting column is installed at the bottom of the side, away from the lignite treatment box, of the lignite conveying box, and a sweeping and scraping guide assembly is installed on the side, close to the opening of the lignite treatment box, of the lignite conveying box; and a lignite conveying and processing mechanism extending into the lignite conveying box is mounted in the lignite processing box. According to the lignite crushing and conveying device, crushed lignite can be screened and conveyed, and it is guaranteed that lignite of different standards can be conveyed into different containers to be stored. And meanwhile, the lignite with different qualities is stored in a classified manner, so that the probability that the quality of the lignite does not reach the standard during subsequent processing can be effectively reduced.

The utility model discloses a lignite uniform blanking airlock distributor, which relates to the technical field of distributors and comprises a trapezoidal shell, and a second valve casing is assembled on a top flange of the trapezoidal shell. By arranging the first valve shell, the guide inclined plate, the side shell, the valve shaft, the valve plate, the heavy hammer handle, the heavy hammer blocks and the second valve shell, the guide inclined plate gathers lignite, the valve plate supports the lignite, as the weight of the lignite exceeds the weight of the two groups of heavy hammer blocks, the heavy hammer handle warps upwards, the valve plate turns downwards, the lignite is poured into the second valve shell below, and the lignite is uniformly discharged. Along with the reduction of the quantity of lignite on the valve plates, the valve plates upwarp and reset under the compression of the heavy hammer block, the lignite is poured into the trapezoidal shell by the valve plates in the second valve shell under the compression of the same weight, the two layers of valve plates are alternately opened and closed, the sealing performance is better, the double-layer air locking function is achieved, and the problem that the air locking capacity of the device is poor is solved.

The present application relates to a kind of lignite oil coupling large coal-fired boiler power generation process system, belong to coal energy technical field.The present application is to solve the problem of low overall economic benefit in the process of lignite dry distillation for increasing the yield of coal gas and tar, the energy consumption of required pressurization and heating makes.The present application includes lignite oil sub-system and lignite boiler power generation subsystem;Lignite oil sub-system uses lignite as raw material to prepare kerosene and coal gas, lignite boiler power generation subsystem uses lignite, semi-coke generated by lignite oil sub-system and limestone as raw material for combustion power generation;Lignite oil sub-system and lignite boiler power generation subsystem produce coupling effect through double-helix pyrolysis furnace, screw feeder, back material valve, combustion chamber, cyclone separator and boiler back material pipe, lignite oil sub-system provides semi-coke for lignite boiler power generation subsystem, and lignite boiler power generation subsystem provides high-temperature circulating ash for lignite oil sub-system.The present application is mainly used for preparing kerosene, coal gas and power generation.

The present application provides a kind of lignite powder system, comprising: hot blast stove, settling tube, coal mill and dust collector, the side of hot blast stove is fixedly connected with combustor, the feed inlet of hot blast stove is connected with pneumatic feeding device, fire wall is arranged in the furnace cavity near the air outlet of hot blast stove, and the gap for airflow passing between fire wall and furnace cavity is left;The air inlet of settling tube is connected with the air outlet of hot blast stove, and baffle is arranged in the settling tube near the air outlet of settling tube, and the gap for airflow passing between baffle and the inner wall of settling tube is left;The coal mill is connected with the settling tube, and the air inlet of coal mill is connected with the air inlet of settling tube, and the air inlet of settling tube is connected with the air inlet of coal mill, and filter plate is connected on air inlet channel;The dust collector is connected with the coal mill, and the dust collector is connected with finished product bin.The present application solves the problem that hot flue gas carrying spark enters coal mill and easily causes deflagration, so that lignite powder system can be long-term, stable, efficient and safe production.

The present application relates to a kind of methods for extracting germanium-humic acid coexistence from germanium-containing lignite.Belongs to germanium extraction technical field, the method includes extracting germanium-humic acid coexistence from germanium-containing lignite by leaching treatment with ammonia as leaching agent in oxygen atmosphere.The method for extracting germanium-humic acid coexistence from germanium-containing lignite of the present application improves the leaching rate of germanium, has high coal yield, is green and environmentally friendly, and the obtained residual coal can be modified and effectively recovered.

The invention provides a coal-fired power plant biomass blending combustion system and method using upgraded lignite. The coal-fired power plant biomass blending combustion system using the upgraded lignite comprises a pulverized coal boiler, a biomass carbonization device, a lignite upgrading device, a flue gas supply pipeline, a mixing and crushing device and a gas-solid separation device, a combustor is arranged on the pulverized coal boiler, and a flue of the pulverized coal boiler is provided with a flue gas connector; an outlet of the flue gas supply pipeline is connected with a flue gas inlet of the biomass carbonization device and a flue gas inlet of the lignite upgrading device; an inlet of the mixing and crushing device is connected with an outlet of the biomass carbonization device and an outlet of the lignite upgrading device; an inlet of the gas-solid separation device is connected with an outlet of the mixing and crushing device, and an outlet of the booster fan is connected with an inlet of the combustor through a first pipeline. Therefore, according to the coal-fired power plant biomass blending combustion system utilizing the upgraded lignite, the utilization rate of biomass can be effectively improved.

The present application relates to lignite drying technical field, propose a kind of vertical double-channel drying pipeline device and control method, the device includes vertically arranged drying pipeline shell, inside partition plate separates its into top intercommunicating uplink channel and downlink channel;Uplink channel bottom connects vertically extending pipeline, downlink channel bottom connects arc flow guide pipeline.The method is based on the principle of pressure difference inversion: obtain pipeline pressure difference by detection unit, utilize pre-calibrated pressure difference-flow relationship model to invert gas flow, and calculate material flow in combination with feeding frequency, and then real-time obtained gas-solid ratio;Control system generates multilevel control instruction according to gas-solid ratio, outlet moisture and pressure difference signal, carries out closed-loop regulation to fan and feeding device.The vertically arranged drying pipeline shell of the present application can avoid lignite accumulation, solve the problem of pipe accumulated coal powder spontaneous combustion in production process.

Processes are provided for the production of humic acids from coal such as lignite, involving mixing comminuted coal solids with an aqueous alkaline solution under subcritical extraction conditions, which comprise an extraction temperature of from 25 to 50° C.; an extraction pressure of from >0.1 MPa to <0.5 MPa; a flow of an oxygen containing gas; and potassium hydroxide.

The invention provides a system and a method for carbonizing biomass and upgrading lignite in a coal-fired power plant. The biomass carbonization and lignite upgrading system for the coal-fired power plant comprises a pulverized coal boiler, a biomass carbonization device, a lignite upgrading device, a flue gas supply pipeline and a gas-solid separation device, a combustor is arranged on the pulverized coal boiler, and a flue of the pulverized coal boiler is provided with a flue gas connector; an inlet of the flue gas supply pipeline is connected with a flue gas connector on the flue, and an outlet of the flue gas supply pipeline is connected with a flue gas inlet of the biomass carbonization device and a flue gas inlet of the lignite upgrading device; a gas outlet of the gas-solid separation device is connected with an inlet of the booster fan, an outlet of the booster fan is connected with an inlet of the combustor through a first pipeline, and a solid outlet of the gas-solid separation device is connected with the first pipeline. Therefore, according to the biomass carbonization and lignite upgrading system for the coal-fired power plant, biomass carbonization and lignite upgrading can be facilitated, and the safety is high.