126results about "Solid fuel pretreatment" patented technology

The invention discloses a biomass boiler fuel adaptability enhanced feeding system and a control method. The biomass boiler fuel adaptability enhanced feeding system comprises a feeding device, a fuel pretreatment module, a multi-parameter detection module, a control unit and an execution mechanism. The feeding device comprises a screw feeder and a vibrating feeder which are arranged in parallel, outlets of the screw feeder and the vibrating feeder are converged into the same blanking channel, a wear-resistant ceramic lining plate is laid on the inner wall of the channel, and a pneumatic arch breaker is mounted at the bottom of the channel. Through a multi-stage pretreatment and intelligent feedback control cooperation mechanism, the adaptability of the complex biomass fuel is remarkably improved. The two-stage pretreatment module effectively breaks caking, screens out overrun particles and adjusts the water content, and the blocking risk is eliminated from the source; multi-parameter real-time detection is combined with a self-adaptive control algorithm, the feeding rate and the air-coal ratio are dynamically optimized, the combustion stability is ensured, and the heat efficiency is remarkably improved; due to the abnormal working condition self-diagnosis function, the manual intervention frequency is reduced, and multi-fuel combustion of multiple components in any proportion is supported.

The invention provides a power plant fuel blending combustion optimization method based on multi-source data and deep learning, and the method comprises the steps: detecting key characteristic indexes of incoming fuel, and constructing a dynamically updated fuel characteristic database; based on the fuel characteristic database, the boiler operation parameters and the load prediction data, a real-time fuel blending scheme is generated through a multi-objective optimization algorithm; performing a virtual combustion test on the real-time fuel blending scheme by using the three-dimensional combustion model of the boiler, and adjusting the opening degree of a secondary air door in the real-time fuel blending scheme; the method comprises the following steps: recording a data chain of fuel in a whole life cycle from factory entry to combustion through a block chain technology, generating a tamper-resistant carbon emission report, and when unconventional fuel is subjected to blending combustion, adapting combustion characteristics of the unconventional fuel through a transfer learning algorithm and generating a safe blending combustion proportion threshold value. And a real-time fuel blending scheme is generated and optimized through virtual testing, so that the fuel blending combustion optimization efficiency is effectively improved.

The invention discloses a boiler blending combustion biomass fuel coupling chemical looping combustion system, and particularly relates to the technical field of fuel control, the system comprises an operation monitoring module, through deploying a multi-type sensor network at a key position, real-time collecting whole flow operation data, constructing a space-time monitoring data set covering the physical and chemical process of a combustion system, and determining a combustion state of the combustion system; the reliability of data acquisition is guaranteed through signal filtering and abnormal value correction; according to the method, a multi-dimensional cooperative control framework is constructed, the six-dimensional influence coefficients are fused into the comprehensive distribution index, the distribution strategy of the fuel between the main combustion area and the chemical looping reactor is dynamically optimized, traditional single control dimension is expanded to multi-dimensional cooperative control, and the adaptability of the system to complex fuel characteristics is improved.

The invention relates to a boiler operation parameter optimization method and system for multi-fuel combustion of multiple solid wastes, and the method comprises the following steps: (1) multi-source data collection: obtaining the heat value, the water content, the chlorine-sulfur ratio and the heavy metal content of the solid wastes in real time through a spectrum analyzer, a visual recognition system and an online sensor; (2) intelligent compatibility optimization: calculating a solid waste mixing ratio by adopting a genetic algorithm based on calorific value balance and pollutant inhibition targets, and controlling a Cl / S molar ratio to be 1.2-1.8 and the alkali metal content to be 1t; 50%; (3) pretreatment and drying: the water content gt; and carrying out microwave-steam combined drying on 25% of solid waste, and dynamically adjusting microwave power, steam injection time and the like. The method has the advantages that through the technical integration of multi-source data fusion, intelligent algorithm optimization and digital twinborn verification, a solid waste co-combustion full-process optimization system is constructed, and ultralow emission of pollutants and safe and economical operation are achieved while the energy utilization rate is increased.

The disclosure provides a coal conveying control system and method for a thermal power plant. The system includes: a model prediction module, used for building an operating load prediction model, and obtaining a boiler operating load optimal value; a load calculation module, used for drawing an operating load difference value curve, and determining a boiler coal consumption change amount; a speed control module, used for determining a coal conveying amount of a coal conveying system, and controlling operating speed of a coal conveying belt according to the coal conveying amount; a quality calculation module, used for calculating boiler operating efficiency, and determining a coal quality parameter according to the boiler operating efficiency; a fineness control module, used for determining a coal particle parameter, setting target coal particle fineness according to the coal particle parameter, and controlling a screening and crushing device according to the target coal particle fineness.

A control device of the present disclosure is used in a foreign substance removal device including a removal section configured to pick up and remove a foreign substance from a waste material conveyed by a conveyance device, a dust-proof section configured to perform dust-proofing related to maintenance of the foreign substance removal device with respect to powder dust derived from the waste material, and an imaging section located upstream of the removal section and configured to capture an image of the waste material. The control device executes one or more of control processing of controlling the dust-proof section based on information regarding an amount of waste material obtained from an image captured by the imaging section, and output processing of outputting information regarding the maintenance of the foreign substance removal device based on the information regarding the amount of waste material obtained from the image captured by the imaging section.

The invention provides a thermal power plant boiler dynamic coal blending management system and method based on a cloud platform, and the system comprises a data collection layer which is used for obtaining multi-source data; the cloud platform processing layer comprises a constraint generation module and an optimization decision module, the constraint generation module is used for constructing an optimization constraint condition according to the multi-source data, the optimization decision module is used for determining an optimal coal blending scheme according to the optimization constraint condition and a preset optimization target, and the optimal coal blending scheme at least comprises the blending combustion proportion of each coal type in the total coal feeding amount; and the execution control layer is used for generating a control instruction of the coal feeder according to the optimal coal blending scheme. According to the method, the multi-source data and the intelligent algorithm are integrated through the cloud platform, the constraint condition of actual operation is considered, the blending combustion proportion of each coal type in the total coal feeding amount is determined, real-time dynamic optimization of the coal blending process of the thermal power plant is achieved, the preset optimization target is met, the safety, reliability and response rate of system operation are greatly improved, and the coal blending efficiency of the thermal power plant is improved. Different operation requirements of a thermal power plant are met.

The invention provides an ultra-supercritical coal-fired power plant pebble coal recycling pulverizing system and a working method, and belongs to the technical field of coal-fired power plant pulverizing. A pneumatic conveying mode is adopted, pebble coal generated by a plurality of coal mills can be uniformly and hermetically conveyed to a pebble coal bunker through a centralized recovery network consisting of an air compressor, a main gas transmission pipeline, a branch recovery pipeline and a valve, and a traditional manual clearing and conveying or mechanical carrying mode is replaced. The system and a main coal mill are in linkage control, and discharging and feeding are achieved; by arranging an independent secondary pulverizing loop composed of a ball mill, a separator and the like, pebble coal which is discharged by a traditional medium-speed coal mill and is high in heat value is deeply ground, qualified coal powder is prepared and sent back to a boiler to be combusted, resource reutilization of solid waste is achieved, heat energy contained in the solid waste is effectively recycled, and energy conservation and emission reduction are achieved. The fuel consumption and the fuel cost of a power plant are directly reduced, and meanwhile, the disposal cost and the environmental pressure of the solid waste are reduced.

The disclosure relates to a self-contained mobile power generator entity (100) comprising: a biomass fuel inlet (103) configured to allow passage of biomass fuel feedstock (105) into the power generator unit; a chopper unit (107) connected to the biomass fuel inlet and configured to receive the biomass fuel feedstock and produce ignitable pieces of biomass fuel; a fuel dryer unit (109) arranged to receive the produced ignitable pieces (105a) of the biomass fuel and configured to remove excess moisture from the ignitable biomass fuel pieces in order to produce dried ignitable pieces of biomass fuel; at least one energy converter unit (113,113a,113b) configured to convert an input thermal energy, provided by a heat source and a heat sink, to an output kinetic energy; a combustion unit (111), arranged in thermal communication with the at least one energy converter unit, to provide the heat source to the at least one energy converter unit; the combustion unit being configured to receive the dried ignitable pieces of biomass fuel and configured to generate heat energy by combusting the dried ignitable pieces of biomass fuel; a heat sink unit (115), arranged in thermal communication with the at least one energy converter, to provide the heat sink to the at least one energy converter unit and dissipate heat from the at least one energy converter unit; a power generator unit (117,117a,117b) in operational communication with the at least one energy converter unit, and configured to convert the output kinetic energy received from the at least one energy converter unit to an output electrical power. The disclosure further relates to a method, a computer-implemented method for commencing and controlling an operation of a self-contained mobile power generator entity, a control system (200), a computer program product and a computer program carrier.

The air supply device comprises an air supply pipe, a cold air assembly and a measuring element, the two ends of the air supply pipe are provided with a hot air inlet and an air supply outlet respectively, the hot air inlet is provided with an adjusting valve, and the cold air assembly is connected to the air supply pipe and is close to the hot air inlet; a communication port of the cold air assembly and the air supply pipe is arranged in the circumferential direction of the air supply pipe, and the measuring element is located between the cold air assembly and the air supply outlet in the air flow direction of the air supply pipe. The communication port of the cold air assembly and the air supply pipe is arranged in the circumferential direction of the air supply pipe, so that cold air enters the air supply pipe in the circumferential direction of the air supply pipe, the contact area of the cold air and hot air is increased, the mixing uniformity of the cold air and the hot air is improved, and the flow of the mixed gas measured by the measuring element is closer to the flow of the mixed gas at the air supply outlet; the hot air flow at the hot air inlet is controlled according to the flow measured by the measuring element, so that the flow of the mixed gas conveyed by the air supply device is accurately controlled.

The invention discloses a device and a method for improving the air inlet uniformity of an air ring at a mill inlet and cooperatively scraping pebble coal. The device comprises a special-shaped rotating shaft, a movable scraping plate, a shaft sealing piece and an angle driving execution mechanism, the two ends of the special-shaped rotating shaft are cylindrical; one end of the movable scraping plate is provided with a sliding groove, and the other end of the movable scraping plate is a free end; the special-shaped rotating shaft penetrates through the sliding groove, the two ends of the special-shaped rotating shaft penetrate out of the two sides of the horizontal section connector air duct correspondingly, and shaft sealing pieces are arranged at the intersections of the special-shaped rotating shaft and the two sides of the horizontal section connector air duct correspondingly. The special-shaped rotating shaft cannot rotate in the sliding chute, but can slide in the sliding chute; one end of the special-shaped rotating shaft is connected with an angle driving executing mechanism, the angle driving executing mechanism drives the special-shaped rotating shaft to rotate and drives the movable scraper to rotate, and when the free end of the movable scraper rotates to the bottom of the horizontal section connector air duct, the free end of the movable scraper makes contact with the bottom of the horizontal section connector air duct. The air inlet uniformity of the mill inlet air ring is improved, pebble coal scraping is promoted synergistically, and the effect is remarkable.

A combustion method using a fuel combustion device, a cement manufacturing method, and a cement calcination facility including a fuel combustion device, in which while the amount of a fossil fuel used as a fuel supplied to a fuel combustion device provided in various facilities such as a cement calcination facility is reduced, the radiation heat transfer amounts of various burners are maintained, whereby the amount of heat transferred to a heating target such as a powder raw material of cement clinker is maintained to maintain a state suitable for calcination, the amount of carbon dioxide emitted from the various facilities is reduced, and the various facilities can be operated at a low cost, and a fuel combustion device including a fuel supply mechanism having a mechanism that supplies a flammable powder, a mechanism that supplies a fuel gas, and a mechanism that supplies a non-flammable powder are used.

A wind-powder balanced distribution method and device for coal pulverizing system of coal-fired unit are provided to solve the problem of uneven distribution of wind-powder of each burner caused by the change of coal quality and output of coal mill during unit peak shaving, which comprises M wind-powder pipelines connected with the outlet of coal mill; each pipeline is divided into n sub-pipelines, and the wind resistance of the same group of sub-pipelines is approximately equal by adjusting the path / length; the ends of the same column of sub-pipelines are combined and directly connected with the burner; an on-line detection device and a wind volume adjusting device are arranged on the combined pipeline; the wind volume control device receives the detection signal and controls the adjusting device to make the wind volume of each combined pipeline equal. By splitting and combining the pipeline to recombine the wind-powder flow, the self-adaptive balanced distribution of pulverized coal is realized simultaneously by only controlling the final wind volume balance, and it is not necessary to detect the pulverized coal concentration in real time. The present application has strong resistance to load / coal quality disturbance and fast response speed; there is no spoiler, and the wind resistance loss is small; the structure is simple and easy to implement. The present application is suitable for flexible peak shaving scene of coal-fired unit of direct-fired pulverizing system.

The invention provides a subcritical unit rapid load increasing system and a load increasing method thereof, and relates to the technical field of coal-fired power plant boilers, the subcritical unit rapid load increasing system comprises a coal-fired power plant boiler and a pulverizing device which are connected; the hearth is directly connected with a combustion assembly, and the combustion assembly is provided with a high-position combustor, a main combustor and a low-position combustor. An economizer is arranged at the lower part of the hearth tail flue; an inlet flue of the economizer is communicated with an external combustion device; a feed port of the coal feeder is butted with a discharge port of the coal hopper, and a discharge port of the coal feeder is connected with the coal mill; the first outlet pulverized coal pipe is communicated with the pulverized coal separator, the second outlet pulverized coal pipe is communicated with the main burner, and a pulverized coal return main pipe on the pulverized coal separator is communicated with the coal mill; a pulverized coal returning branch pipe on the pulverized coal separator is communicated with the pulverized coal returning storage hopper, a feeding port of the pulverized coal feeding and returning machine is in butt joint with a discharging port of the pulverized coal returning storage hopper, and a discharging port of the pulverized coal feeding and returning machine is connected with the coal mill. The problems that existing DCS control logic cannot change physical characteristics, and an independent pulverized coal storage bin is prone to explosion are solved, and the effect of rapid load rising is achieved.

The present invention relates to the field of heating equipment, specifically an energy-saving semi-coke heating furnace, which includes a furnace body, a feeding mechanism, a discharging mechanism, a wind hood mechanism, a air supply assembly and an energy storage tank. An installation plate is horizontally welded on the inner wall of the furnace body. A partition plate is welded at the center position inside the furnace body directly above the installation plate. A discharging mechanism is installed at the gap between the partition plate and the installation plate. The inner area of the furnace body is divided into a semi-coke feeding area and a semi-coke combustion area by the partition plate. A feeding mechanism for conveying semi-coke is installed in the semi-coke feeding area. A wind hood mechanism is arranged in the semi-coke combustion area. An air supply assembly is installed at the gap between the installation plate and the inner wall of the furnace body. Energy storage tanks are symmetrically installed on both side walls of the furnace body by bolts. A feeding port is opened on the top end face of the furnace body at a relatively high horizontal position, and a furnace port is opened on the top end face of the furnace body at a relatively low horizontal position. The present invention has the characteristics of reducing the explosion rate of semi-coke combustion and increasing the thermal efficiency of semi-coke combustion.

A method for promoting the combustion of a combustible material, improving the power output of a combustion device and prolonging the service life of the combustion device by adding an alkali metal element and / or an alkaline earth metal element into the combustible material, relating to the technical field of combustion supporting. The method is applicable to various combustible materials and various combustion devices. A combustion device, and a fuel for promoting the combustion of a combustible material, improving the power output of a combustion device and prolonging the service life of the combustion device, respectively comprising a combustion device, and a fuel for nuclear fusion and nuclear fission. The method can enable all kinds of combustion devices to be reliably started and efficiently and safely work in any environment.

The invention discloses a coal-fired mixed biomass feeding system and a control method for the coal-fired mixed biomass feeding system, the coal-fired mixed biomass feeding system is used for a coal-fired unit, the coal-fired mixed biomass feeding system is suitable for feeding towards a combustor of the coal-fired unit, and the coal-fired mixed biomass feeding system comprises a biomass feeding device, a raw coal bunker and a coal mill, the biomass feeding device comprises a conveying assembly and a discharging pipe. The conveying assembly is used for conveying biomass to the discharging pipe. The discharging pipe extends into the raw coal bunker, and the raw coal bunker is suitable for storing raw coal; the coal mill is connected to the downstream of the raw coal bunker, the coal mill is used for grinding biomass and raw coal into a mixed material, and the combustor is communicated to the downstream of the coal mill. According to the coal-fired mixed biomass feeding system, the discharging pipe extends into the raw coal bin, raw coal can wrap biomass to flow downwards when flowing downwards, the biomass and the raw coal can be evenly mixed before entering the coal mill, the coal mill is not prone to detonation, and the operation safety is improved.

The invention relates to the field of thermal power generating unit energy storage media, and discloses a coal water slurry system for rapid load increasing of a coal-fired unit, and the coal water slurry system is coupled to a pulverized coal furnace of the coal-fired unit. Comprising a water-coal-slurry preparation system, a water-coal-slurry storage system, a water-coal-slurry conveying system and a water-coal-slurry burner which are sequentially connected together through a water-coal-slurry pipeline. The direct-fired pulverizing system of the pulverized coal furnace is coupled with the coal water slurry energy storage system, so that the direct-fired pulverizing system is fully used for providing fuel, energy is quickly released through the energy-stored coal water slurry system, and the load is quickly increased. The load can be increased to a numerical value required by a power grid in a short time, and meanwhile, stable combustion of the boiler is kept.

The invention belongs to the technical field of thermal power generation, and discloses a pulverized coal fired boiler coke powder blending combustion system which comprises a coke powder bin, a bin top dust remover is fixedly installed at the top end of the coke powder bin, a bin top safety valve is fixedly installed at the position, located on the outer side of the bin top dust remover, of the top end of the coke powder bin, and a star-shaped unloader is fixedly installed on the edge of the bottom end of the coke powder bin. A sensor is installed on one side of the star-shaped discharger in an embedded mode, a frequency converter is installed at the position, located at one end of the sensor, of one side of the star-shaped discharger, and the bottom end of the star-shaped discharger is connected with a discharging pipe. Meanwhile, the blending combustion amount can be accurately controlled, the boiler runs stably, the maximum blending combustion amount of an originally designed single boiler is increased to 1-5 t / h from about 1.28 t / h, the phenomenon that ash combustible matter rises due to the large blending combustion amount does not occur in the boiler, the blending combustion efficiency is greatly improved, and meanwhile abrasion of equipment such as a coal mill is reduced.

The invention relates to an intelligent granular fuel boiler system. The intelligent granular fuel boiler system comprises a boiler body, a feeding device arranged on the outer side of the boiler body, a combustion device, a smoke guide device, a pushing device, a discharging device and a control unit. The control unit drives all execution components and controls the feeding device arranged on the boiler body to feed fuel to the combustion device in the hearth for combustion according to the accurate proportion, combusted slag is pushed into the discharging device through the pushing device to be discharged, the slag is pushed into the slag collecting box, and then the slag is discharged to the outer side of the boiler through the slag discharging assembly. According to the device, automatic feeding, combustion, slag pushing and slag discharging of the boiler are achieved, unmanned operation is achieved, and the device is compact in structure, can be easily integrated into an existing boiler system and has remarkable economic benefits and environmental protection value. Through the automatic slag removal device, the heat efficiency of the boiler can be improved by 15%-20%, the manual operation and maintenance cost is greatly reduced, resource utilization of agricultural waste is promoted, and wide market application prospects are achieved.

The invention relates to the technical field of biomass combustion boilers, and discloses a biomass combustion system capable of achieving partitioned feeding, which comprises a combustion furnace, the upper end of the combustion furnace is communicated with a feeding chamber, a screening plate is hinged to one side of the upper end in the feeding chamber, and a screening transmission mechanism is arranged in the feeding chamber; two smashing rollers are arranged on the inner side of the lower end of the combustion furnace, a movable shaft is fixedly installed at the axis position of the other smashing roller, a smashing transmission mechanism is further arranged on the outer wall of the combustion furnace, discharging shafts are symmetrically and rotationally installed at the position, communicated with the feeding chamber, of the combustion furnace, discharging plates are installed on the discharging shafts, and a discharging transmission mechanism is arranged on the combustion furnace. A heat exchange mechanism is further arranged in the combustion furnace. Biomass fuels with different granularities are prevented from directly entering the combustion furnace, meanwhile, under the action of the crushing transmission mechanism, the biomass fuels with the different granularities are subjected to partitioned extrusion type crushing and feeding, and the combustion efficiency of the biomass fuels is greatly improved.

The present invention discloses a combustion system and method adapted for flexible peak regulation of a four-corner tangential boiler. The combustion system adapted for flexible peak regulation of a four-corner tangential boiler comprises a furnace, five layers of DC burners and swirl burners. The five layers of DC burners are, from bottom to top, a first layer of DC burners, a second layer of DC burners, a third layer of DC burners, a fourth layer of DC burners and a fifth layer of DC burners. Each layer of the DC burners comprises four DC burners arranged at the four corners of the furnace. The DC burners have a primary air channel. At least one layer of the DC burners is a stable combustion DC burner layer. A swirl burner is provided in the primary air channel of each of the four DC burners in the stable combustion DC burner layer. The combustion system and method adapted for flexible peak regulation of a four-corner tangential boiler according to the embodiment of the present invention have the advantages of low construction difficulty, short construction period, low transformation cost and low operating cost.

[PROBLEM] To effectively use a combustible waste such as waste plastic, waste tires, rice husk, wood shavings, PKS, RDF and sludge while maintaining stable operation; to improve the combustion efficiency of a fossil fuel such as coal and coke; and furthermore to reduce the NOx concentration in a cement kiln exhaust gas. [SOLUTION] An apparatus 1 for treating a combustible, the apparatus comprising: a mixer 3 for mixing a combustible C with a preheated raw material R2, which has a temperature of 600°C or higher and 900°C or lower and which is drawn from a preheater cyclone of a cement burning device 10, to gasify the combustible; and a feeder 5 for feeding the gasified combustible and the preheated raw material (mixed raw material M) to a region from an inlet end 13a of the cement burning device to a calciner 12. When the combustible and the preheated raw material are mixed, moisture may be added to cause water gas shift reaction, and the resultant water gas and the preheated raw material may be introduced to the region from the inlet end of the cement burning device to the calciner.

The invention discloses clean processing and upgrading equipment for power coal, belongs to the technical field of advanced green coal dressing, and is used for solving at least one of the problems of poor separation effect, small separation particle size range and low separation precision of fine-grained and viscous and humidified power coal in the prior art. According to the system, an oversize outlet of a first-stage classifying screen is connected with a feeding port of an X-ray sorting unit, discharging ports of the X-ray sorting unit are divided into a first-stage clean coal discharging port and a first-stage gangue discharging port, and the first-stage clean coal discharging port is connected with a feeding port of a second-stage classifying screen through a crushing unit; an undersize outlet of the first-stage classifying screen is connected with a feeding port of the second-stage classifying screen, an oversize outlet of the second-stage classifying screen is connected with a feeding port of the dry-method sorting unit, discharging ports of the dry-method sorting unit are a second-stage clean coal discharging port and a second-stage gangue discharging port respectively, and an undersize outlet of the second-stage classifying screen is connected with the low-temperature steam drying unit. The method can be used for clean processing and upgrading of the power coal.

The invention belongs to the field of pulverized coal ammonia-doped combustion, and provides a pulverized coal ammonia-doped combustion device and method for steam preheating and tempering, and the device comprises a spray head and a pipeline assembly connected with the spray head; the pipeline assembly comprises an ammonia gas pipeline, and a water vapor channel, a pulverized coal and primary air channel, a rotational flow secondary air channel and a tertiary air channel are sequentially arranged outwards in an axial symmetry mode along the two sides of the ammonia gas pipeline. The ammonia gas pipeline and the water vapor channel are respectively provided with a spray head plate, and the spray head plate is provided with a nozzle; and ammonia gas in the ammonia gas pipeline and water vapor in the water vapor channel are converged near the central axis of the combustor and are fully mixed. The device can promote pre-decomposition of ammonia gas, improve temperature distribution of a hearth and achieve the aim of coal-ammonia stratified combustion.

The invention provides an ear-shaped pulverized coal distribution device for a coal mill and the coal mill, and relates to the technical field of pulverized coal distribution of the coal mills, the ear-shaped pulverized coal distribution device comprises a first separation part, a second separation part, a baffle and a pulverized coal return pipe, the first separation part is provided with a separation cavity and is provided with a first inlet and a first outlet which are communicated with the separation cavity; the first inlet is suitable for being communicated with a separator of the coal mill so as to enable pulverized coal airflow to enter the separation cavity, and the pulverized coal airflow can be separated into pulverized coal concentrated-phase airflow and pulverized coal dilute-phase airflow in the separation cavity; the second separation part is provided with a concentrated phase chamber and a dilute phase chamber, the baffle is movably connected with the concentrated phase chamber and divides the concentrated phase chamber into a first concentrated phase area and a second concentrated phase area, and an outlet of each of the first concentrated phase area and the dilute phase chamber is suitable for being communicated with a primary air powder pipe of the coal mill; and the powder return pipe is communicated with an outlet of the second concentrated phase region. Distribution adjustment of pulverized coal between the outlet of the coal mill and the primary air powder pipe can be achieved, so that air powder distribution uniformity is improved, and the overall structure is simple.

The invention relates to a supplementary pellet feeding device (12) for a pellet stove (10), characterized in that it comprises at least one reservoir (24) adapted to hold pellets, a coupling sleeve (52) extending from the outlet of the reservoir (24) to a lower section designed to communicate with an inlet port (64) of a pellet stove (10), said inlet port (64) being connected to a pellet storage bin (22) of said stove (10), and a valve (36) fitted to the reservoir (24) and movably mounted between a closed position in which the pellets are retained in the reservoir (24) and an open position in which the pellets can flow by gravity to feed the storage bin (22) of the stove (10). (Fig. 1)

The invention relates to a bulk material conveyor (100) for conveying a solid fuel (200) in bulk material form, comprising a conveyor pipe (102) providing a conveyor section (104) in which a rotationally drivable or rotationally driven conveyor screw (106) is present, wherein the conveyor pipe (102) comprises a fuel inlet (108) at the beginning of the conveyor section (104) and a fuel outlet (110) at the end of the conveyor section (104). On the outlet side or near the fuel outlet (110) there is a dry air inlet (112) which is fluidically connected to an air conveying device (112) for supplying heated drying air into the conveying pipe (102), wherein the conveying pipe (102) has, at a location away from the fuel outlet (110), a moist air outlet (116) for discharging the drying air which has been conveyed through the conveying pipe (102) by means of the air conveying device (114).The invention also relates to a heating system (300) and a method for drying a solid fuel (200).

The invention discloses combustion equipment with a function of improving low-load stable combustion of a boiler. The equipment comprises a base, and a braking cavity, a pulverized coal blowing cavity and an atomizing combustion cavity are sequentially formed in the top of the base; the brake chamber is connected with the pulverized coal blowing chamber, the pulverized coal blowing chamber is communicated with the atomization combustion chamber, a fan unit is arranged in the pulverized coal blowing chamber, and pulverized coal is blown into the atomization combustion chamber through the fan unit for combustion; according to the device, the coarse-face pulverized coal filter plate and the fine-face pulverized coal filter plate do differential reciprocating linear motion, slag generated by combustion in the pulverized coal boiler is repeatedly screened, pulverized coal in the slag is blown into the atomization combustion chamber for secondary combustion, the utilization rate of the pulverized coal in the slag is increased, and the combustion efficiency of the boiler in a low-load state is improved; in the whole process, water, high-temperature tail gas and pulverized coal in slag are used as combustion materials, so that the combustion efficiency of the boiler in a low-load state can be improved, and the purposes of energy conservation and environmental protection can be achieved.

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.