37 results about "Coal pipeline" patented technology

The invention provides a pulverized coal concentration device based on a charge method and a control method of the pulverized coal concentration device, and belongs to the field of combustion of coal-fired boilers. The problems that a traditional inertia separation technology is low in separation efficiency and prone to abrasion in the low-load stable combustion process of the pulverized coal boiler are solved. Comprising a corona discharge device, a grounding device, a central discharge device, a concentrated pulverized coal pipeline and a light-phase pulverized coal pipeline, a guide plate is arranged at an inlet of the concentrated pulverized coal pipeline, one end of the light-phase pulverized coal pipeline is inserted into the concentrated pulverized coal pipeline, and the other end of the light-phase pulverized coal pipeline is located on the outer side of the concentrated pulverized coal pipeline; the corona discharge device is arranged on the outer side wall, corresponding to the insertion section of the light-phase pulverized coal pipeline, of the concentrated pulverized coal pipeline, the grounding device is of an annular structure and arranged on the outer side of the corona discharge device in a surrounding mode, and a wear-resistant lining is arranged on the inner wall of the concentrated pulverized coal pipeline. The device is mainly used for improving the pulverized coal concentration of the pulverized coal boiler during low-load operation.

A burner system suitable for deep peak shaving includes a dual-purpose burner for both coal combustion and burnout, located directly below and above a pulverized coal burner. The combustion system's air box includes a pulverized coal burner air box and a dual-purpose burner air box. The pulverized coal burner air box is connected to the pulverized coal burner, and the dual-purpose burner air box is connected to both the dual-purpose burner and the burnout air burner. The dual-purpose burner is arranged in the burnout air area of ​​the furnace. By opening or closing the pulverized coal pipeline of the dual-purpose burner, it can flexibly function as both a pulverized coal burner and a burnout air burner depending on the unit load, ensuring that the main reheat steam temperature under low load and the NOx generated by combustion under high load meet design requirements.

The application discloses a kind of coal powder pipeline blockage early warning method of thermal power plant, it is related to the field of electric power industry automation and condition monitoring technique, the present application automatically identifies the flow characteristic difference of different coal, and dynamically adjusts early warning threshold, avoid the false alarm caused by coal variety change;Adopt the way of generative adversarial network and computational fluid dynamics simulation combination, realize the virtual monitoring to key area such as elbow pipe, break through the limitation that only can rely on straight pipe section monitoring in the past;Through high-frequency sampling and cumulative sum algorithm, the transient abnormal capture ability is significantly improved, and the precursory characteristics of blockage can be found earlier;The linkage of hierarchical early warning mechanism and disposal suggestion makes the system not only can find problems, but also can provide targeted solution, greatly improves operation and maintenance efficiency, using software algorithm upgrade mainly, maximum utilization of existing hardware resources, reduces the transformation cost and implementation difficulty.

The application discloses a flow field uniform distribution device suitable for adjustable and retractable holes of a pulverized coal pipeline, which comprises a shell, a central blunt body arranged at the center of the shell, a first flow guide ring, a second flow guide ring and a third flow guide ring arranged between the shell and the central blunt body from outside to inside, and the first flow guide ring, the second flow guide ring and the third flow guide ring are connected together through support ribs and the shell; the central blunt body comprises a lip-shaped blunt body and annular blades arranged on the circumference of the lip-shaped blunt body, and the shell is provided with an air inlet and an air outlet along the axial direction. A plurality of annular airflow channels are formed between the first flow guide ring, the second flow guide ring, the third flow guide ring, the central blunt body and the shell. The application can improve the distribution characteristics of airflow after the adjustable and retractable holes of the primary air pipeline, improve the airflow distribution uniformity, meet the test requirements under the existing actual conditions, and thus improve the test precision and work efficiency.

The invention relates to the field of blast furnace ironmaking, and particularly discloses electromagnetic preheating equipment for a blast furnace pulverized coal pipeline, which comprises a preheating pipe connected between a mixer and a blast furnace, the preheating pipe is made of a metal material, a plurality of channels for pulverized coal to pass through are arranged in the preheating pipe, and an electromagnetic heating coil is sleeved outside the preheating pipe. After alternating current is introduced into the electromagnetic heating coil, an alternating magnetic field is generated, the preheating pipe generates eddy current and then emits heat, heat is transferred to pulverized coal and nitrogen flowing in the pipeline, the temperature of the pulverized coal rises, and the purpose of preheating the pulverized coal is achieved. The electromagnetic heating coil generates eddy current in the metal preheating pipe to generate heat, so that non-contact heating is realized, and heat radiation loss and open fire hidden dangers of traditional resistance heating are avoided; the alternating magnetic field directly acts on the preheating pipe, and the heat efficiency is obviously higher than that of an indirect heating mode; heat is uniformly conducted to pulverized coal and nitrogen in the channel through the pipe wall, and local overheating or heating dead angles are avoided.

The invention discloses a pipeline coal conveying pump station in-station allocation system which comprises a belt conveying unit, a raw coal surge bin is arranged at one end of the belt conveying unit, a constant feeder is connected to the output end of the raw coal surge bin, a rod mill is connected to the output section of the constant feeder, a water conveying pump is connected to a water inlet of the rod mill, and a water outlet of the water conveying pump is connected to a water outlet of the constant feeder. A discharge port of the rod mill is connected with a coal slurry buffer tank, the coal slurry buffer tank is sequentially connected with a coal slurry pump and a slurry storage tank group through pipelines, the slurry storage tank group is connected with a slurry feeding pump through a pipeline, and the slurry feeding pump is connected with a diaphragm pump through a pipeline. Meanwhile, the invention further discloses a coal slurry blending method, the liquid levels of the raw coal buffer bin, the coal slurry buffer tank and the slurry storage tank group are detected through the sensors, then all the systems are instructed to operate according to the calculated processing load, dynamic balance among all the systems is achieved, and the phenomena of violent fluctuation of system operation and even shutdown caused by insufficient supply are avoided.

The utility model relates to the technical field of pulverized coal pipeline monitoring, and discloses a coal mill pulverized coal pipeline monitoring device which comprises a sampling pipe, pulverized coal pipeline bodies are installed at the two ends of the sampling pipe, an auxiliary pipe is installed at the top of the sampling pipe, and a CO gas sensor is installed at the top of the auxiliary pipe. The clamping and stabilizing assembly comprises a plurality of mounting plates mounted on the outer wall of the auxiliary pipe and a connecting plate mounted at one end, opposite to the CO gas sensor, of each mounting plate, and a clamping plate is fixedly mounted at one end of each connecting plate. The stability and measurement precision of the sensor are ensured, it can be ensured that the sensor is not prone to displacement in the long-term use process, the original installation position of the sensor is kept, installation and disassembly of the sensor are facilitated, personnel can rapidly install and replace the sensor, the maintenance frequency is reduced, and therefore the accuracy of parameter measurement is improved.

The utility model relates to the technical field of lime shaft kilns, in particular to a double-hearth kiln fuel spray gun which comprises a gas pipeline, a pulverized coal pipeline, an inlet sleeve and an outlet sleeve. The coal gas pipeline and the pulverized coal pipeline are both in an L shape, the inlet end of the coal gas pipeline is fixed to the outer wall of the inlet sleeve and communicated with an inner cavity of the inlet sleeve, the inlet sleeve is arranged on the horizontal portion of the pulverized coal pipeline in a sleeved mode, and the two ends of the inlet sleeve are connected with the outer wall of the pulverized coal pipeline in a sealed mode. A coal gas inlet pipe is arranged on the inlet sleeve; the outlet end of the gas pipeline is fixed on the outer wall of the outlet sleeve and communicated with the outlet sleeve, the lower portion of the pulverized coal pipeline is arranged in the outlet sleeve in a penetrating mode in the axial direction of the outlet sleeve, and the top end of the outlet sleeve is connected with the outer wall of the pulverized coal pipeline in a sealed mode. The utility model provides the double-hearth kiln fuel spray gun which not only realizes the diversification of fuel, but also does not limit the use of single fuel.

This utility model discloses a sealing device for a circular backrest tube, including a backrest tube body and a pipeline ball valve sealed to the pressure measuring port of the pulverized coal flow pipeline. The sealing device includes a sealing component threaded to one end of the pipeline ball valve and a compression component. This utility model allows for manual opening of the pipeline ball valve, inserting the backrest tube body through the valve into the pulverized coal pipeline. Manual rotation of the tightening ring drives the compression stud to rotate within the placement groove. During rotation, the compression stud extends towards the sealing ring. Under the compression of the compression stud, the narrow opening in the center of the sealing ring undergoes a certain degree of contraction and deformation, thus tightly wrapping around the outer wall of the backrest tube body, achieving a complete seal between the backrest tube body and the pulverized coal pipeline. This prevents the leakage of primary air and the air-powder mixture, thereby making the wind speed measurement of the pulverized coal pipeline more accurate.

The application discloses a kind of anti-clogging special mechanical transmission device of pulverized coal pipeline, it is related to pulverized coal pipeline technical field, including conveying pipe, the inside of conveying pipe is shaped with the first inner cavity for pulverized coal conveying, wind pipe, the inside of wind pipe is shaped with the second inner cavity for conveying wind force, the second inner cavity is fixed with fixed box inside by welding, stirring mechanism.The application is stirred by being provided with stirring mechanism, fan rotation drives rotating lever rotation, rotating lever rotation drives first bevel gear rotation, first bevel gear rotation drives second bevel gear rotation, second bevel gear rotation drives rotating column rotation, rotating column rotation drives stirring blade rotation, stirring blade rotation and the pulverized coal in the first inner cavity in conveying pipe inside are stirred, by this structure, it is favorable to the operation of pulverized coal conveying stirring and dispersing, avoid the situation that pulverized coal agglomerates appears in conveying pipe inside, to avoid the situation that pulverized coal blockage appears in conveying pipe inside.

The invention discloses a novel jet combustion device suitable for multi-coal blending combustion, belongs to the technical field of combustors, and solves the problem that an existing combustor cannot give consideration to combustion efficiency, stable combustion load and NOx emission due to changeable coal sources and large coal quality difference in a power plant. The burner body is provided with a central air duct, a primary air duct, an inner secondary air channel and an outer secondary air channel which are concentrically sleeved from inside to outside, and the central air duct, the primary air duct, the inner secondary air channel and the outer secondary air channel jointly form a main nozzle. The central air duct is provided with an independent inlet, and the inlet of the external secondary air channel is provided with a tangential air inlet air regulator structure; a pulverized coal concentration device is arranged at the upstream of primary air, an inlet of the pulverized coal concentration device is connected with a primary air pulverized coal pipeline, a first outlet is connected to a primary air cylinder through a concentrated-phase pulverized coal pipeline, and a second outlet is connected to an exhaust gas nozzle through an exhaust gas pipeline; and the exhaust gas nozzle and the main nozzle are in the same vertical plane and are positioned above the main nozzle. The device is mainly used for a power station boiler, and efficient stable combustion and low-nitrogen combustion of different coal types are achieved by conducting dense-thin separation and graded air distribution on air powder airflow.

The invention discloses a thermal power plant pulverized coal pipeline blockage early warning method, relates to the technical field of electric power industry automation and state monitoring, and aims to automatically identify flow characteristic differences of different coal types, dynamically adjust an early warning threshold value and avoid false alarms caused by coal type changes. By adopting a mode of combining a generative adversarial network and computational fluid dynamics simulation, virtual monitoring of key areas such as a bent pipe is realized, and the limitation that monitoring can only depend on a straight pipe section in the past is broken through; the transient abnormality capturing capability is remarkably improved through a high-frequency sampling and cumulative sum algorithm, and blockage precursor features can be found earlier; through linkage of a grading early warning mechanism and disposal suggestions, the system not only can discover problems, but also can provide targeted solutions, the operation and maintenance efficiency is greatly improved, a software algorithm upgrading-based mode is adopted, existing hardware resources are utilized to the maximum extent, and the modification cost and the implementation difficulty are reduced.

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 utility model relates to a pulverized coal pipeline heating device for a pulverized coal boiler. The pulverized coal pipeline heating device comprises a pulverized coal pipeline, a heating assembly and a heat preservation device. The heating assembly is arranged on the outer side of the pulverized coal pipeline, a heat preservation device is arranged on the outer side of the pulverized coal pipeline and the heating assembly, and the heating assembly is an electric heating assembly or a steam heating assembly. In the design of a boiler, the temperature of pulverized coal airflow at an inlet of a pulverized coal pipeline can be controlled to be 120-130 DEG C; by means of the heating device, the temperature of pulverized coal airflow is further increased, and the temperature increasing amplitude ranges from 10 DEG C to 100 DEG C; according to the heating device, the temperature of pulverized coal airflow is increased, ignition heat of the pulverized coal airflow is reduced, the ignition condition of the pulverized coal airflow is improved, and therefore the ignition and stable combustion characteristics of the pulverized coal boiler are effectively improved.

The invention provides an independent disconnecting link type primary air speed adjusting device which comprises a shell, a first connecting rod and a second connecting rod, the shell is provided with a containing cavity and a connecting end, and the connecting end is used for being connected with an opening of a pipeline; the throttling plate is arranged on the shell in the mode of being capable of rotating relative to the shell, the throttling plate has a first state and a second state, when the throttling plate is in the first state, the throttling plate is located in the containing cavity, and when the throttling plate is in the second state, at least part of the throttling plate penetrates through the connecting end from the containing cavity and stretches into the pipeline. Local throttling losses of the pipelines are changed through the throttling plates in a semi-intervention mode, and therefore the relative deviation of the air speed between the pulverized coal pipelines is adjusted. Compared with a traditional core plate type adjustable lock hole, the device has the advantages of being rapid in adjustment, simple in structure, not prone to blockage and rusting and convenient to disassemble. In the replacement process of the device, the pulverized coal pipeline or the coal mill does not need to be stopped, replacement can be completed only through temporary plugging, and therefore the stability of the combustion working condition is guaranteed to the maximum extent.

The utility model provides a non-coal pipeline one-way exhaust valve, and belongs to the technical field of exhaust valves. The non-coal pipeline one-way exhaust valve comprises a valve body and at least one annular waterproof pad. A connecting part and an annular mounting groove are formed at the two opposite ends of the valve body respectively, the connecting part is used for being connected with an exhaust component, and the valve body is provided with an exhaust hole communicating with the mounting groove and the exhaust component. The annular waterproof pad is fixed in the mounting groove and used for sealing the mounting groove, the waterproof pad is provided with a bent part close to the inner circumferential side, one side face of the bent part faces the exhaust hole, and the bent part is a flexible part and is bent in the air outlet direction of the exhaust part. According to the one-way exhaust valve, the exhaust component can be allowed to exhaust outwards, and meanwhile, external air, water and the like are prevented from entering the exhaust component to cause corrosion of the exhaust component or other adverse effects on the exhaust component.

The invention discloses a primary air and powder leveling method based on a correction resistance model and a thermal generator set. The primary air and powder leveling method comprises the steps that firstly, a two-phase flow resistance model of each air and powder pipeline is established; secondly, parameters such as flow velocity, pulverized coal concentration and pressure drop of an air-pulverized coal mixture are tested and measured; thirdly, correcting the resistance model in a mode of optimizing model parameters based on actual test data; fourthly, the scale adjustment of the adjustable shrinkage cavity is guided according to the resistance calculation result of the wind powder pipeline; fifthly, the second step to the fourth step are repeated until the purpose of primary air and powder leveling is achieved, operation state adjustment of the throttling element is guided according to the resistance calculation result of the air and powder pipelines, the resistance characteristics of all the air and powder pipelines tend to be consistent so as to reduce the number of test measurement times, and the adjustable shrinkage cavity scale is adjusted according to the resistance calculation result of the air and powder pipelines. And a previous adjustment mode depending on experience is replaced, and the operation blindness can be effectively reduced.

The application discloses a boiler fuel adding device and relates to the technical field of thermal power plants. The device comprises a pulverized coal pipeline, a mixed air pipeline, a rotary cleaning mechanism I and a sliding cleaning mechanism II. The pulverized coal pipeline comprises a horizontal section, a vertical section and an elbow section. The cleaning mechanism I is arranged at the elbow of the pulverized coal pipeline and can rotate by means of air flow. The device realizes real-time cleaning of the pulverized coal falling at the elbow, avoids the phenomenon of dust accumulation, and the cleaned pulverized coal can be synchronously conveyed to a Venturi tube between the mixed air pipeline and the pulverized coal pipeline by means of a connecting pipe, mixed with hot air flowing in the Venturi tube for the second time, heated and dried, returned to the pulverized coal pipeline again, and finally conveyed into a boiler for combustion, so that the pulverized coal is fully utilized. Moreover, the mixed air pipeline can also heat and dry the primary pulverized coal entering into the pulverized coal pipeline, thereby improving combustion efficiency.

The invention relates to the technical field of pulverized coal boilers, in particular to a quick response system for pulverizing of a medium-speed coal mill. A pulverized coal feeding pipeline independent of the pulverized coal pipeline is arranged at an outlet of the medium-speed coal mill; the powder feeding pipeline is sequentially communicated with the cyclone separator, the air locker, the finished product bin and the feeder, and an outlet of the feeder is connected into the medium-speed coal mill to form a circulation path from the finished product bin to the coal mill; in the pulverized coal storage stage, the pulverized coal feeding valve is opened when the unit operates stably, pulverized coal enters the cyclone separator through the independent pulverized coal feeding pipeline, the separated pulverized coal is stored in the finished product bin, and exhaust gas is fed into the boiler for combustion through the pulverized coal discharging fan. The level gage monitors the powder storage amount, and the system is closed after the powder storage amount reaches a set value. When the load needs to be quickly responded, the nitrogen making machine pressurizes the finished product bin, and pre-stored pulverized coal is injected into the coal mill through the feeding machine and quickly conveyed to the combustor through primary air. According to the method, pulverized coal can be timely supplied several minutes before the initial load rising stage of the unit, and the load response speed of the unit is remarkably increased.

The invention relates to the technical field of ventilation equipment, in particular to a pulverized coal pipeline anti-deposition device based on a cyclone, which comprises a cyclone body, a filter assembly, a cleaning assembly and a driving assembly, the cleaning assembly comprises a cleaning brush, and the driving assembly is used for driving the cleaning brush to intermittently contact with a filter plate. In the contact process, the cleaning brush is driven to rotate in the circumferential direction for cleaning; the cleaning brush which can be intermittently close to the filter plate is used for cleaning the filter plate, the situation that the cleaning brush is continuously contacted and abraded with the filter plate for a long time, and consequently the cleaning brush is seriously worn is avoided, the service life of the cleaning brush is prolonged, the cleaning brush is intermittently cleaned in the ventilation process, ventilation operation is not affected, and the ventilation efficiency is improved. Cleaning work is not needed after ventilation work is stopped, so that continuous ventilation work is guaranteed, in the process that the cleaning brush gets close to the filter plate, the cleaning head of the cleaning brush can stretch into the filter holes of the filter plate to push out dust in the filter holes, and then the cleaning effect is further improved.

The combustor, boiler and combustion system disclosed by the application, the combustor comprises a biomass pipeline, a pulverized coal pipeline, an air pipeline, an ammonia gas combustion assembly and a hydrogen gas combustion assembly, the pulverized coal pipeline is arranged outside the biomass pipeline, an internal part of the biomass pipeline forms a biomass passage, and a pulverized coal passage is formed between the pulverized coal pipeline and the biomass pipeline; the air pipeline is arranged outside the pulverized coal pipeline, and an air passage is formed between the air pipeline and the pulverized coal pipeline; the ammonia gas combustion assembly comprises an ammonia gas distributor, the ammonia gas distributor comprises a plurality of ammonia gas nozzles, and each ammonia gas nozzle is arranged in the pulverized coal passage or the air passage; the hydrogen gas combustion assembly comprises a hydrogen gas distributor, the hydrogen gas distributor comprises a plurality of hydrogen gas nozzles, and each hydrogen gas nozzle is arranged in the air passage. The combustor disclosed by the application can reduce the emission of NOx and improve the combustion efficiency of the boiler.

This utility model discloses a pulverized coal sampler, which includes a pulverized coal pipeline, a sampling tube, a pulverized coal storage tank, an anti-overflow component, and a time relay. The pulverized coal pipeline has at least two spaced sampling ports. One end of the sampling tube is connected to the sampling port, allowing pulverized coal in the pipeline to enter the sampling tube through the sampling port. The pulverized coal storage tank is connected to the other end of the sampling tube, allowing pulverized coal in the sampling tube to enter the storage tank. The anti-overflow component is located in the storage tank, which has a preset position. When the pulverized coal in the storage tank reaches the preset position, the anti-overflow component sends a signal and transmits the signal to a control unit. The control unit stops sampling. The time relay is connected to the control unit and can be set to sample at predetermined intervals and to set the sampling time. The pulverized coal sampler of this utility model has high working efficiency and ensures that pulverized coal does not easily overflow from the pulverized coal storage tank.

The utility model relates to a deep peak regulation combustion centralized optimization system for a tower furnace, which belongs to the field of thermal power generation and comprises a furnace body, and a first pulverized coal burner, a second pulverized coal burner, a third pulverized coal burner, a fourth pulverized coal burner, a fifth pulverized coal burner and a sixth pulverized coal burner are sequentially arranged in the furnace body from bottom to top. A first pulverized coal pipeline, a second pulverized coal pipeline and a third pulverized coal pipeline are arranged outside the furnace body, the first pulverized coal pipeline is connected with a first pulverized coal burner and a second pulverized coal burner through a first adjustable concentration separation device, and the second pulverized coal pipeline is connected with a third pulverized coal burner and a fourth pulverized coal burner through a pulverized coal distributor. And the third pulverized coal pipeline is connected with a fifth pulverized coal burner and a sixth pulverized coal burner through a second adjustable concentration separation device. The utility model has the beneficial effects that the air-coal ratio can be adjusted at any time through the adjustable concentration separation device, and better oil-saving and stable-combustion effects can be realized without the aid of auxiliary combustion-supporting means such as an oil gun and the like.

The utility model discloses a portable manual sampler for an air pulverized coal pipeline, and belongs to the technical field of air pulverized coal sampling. The utility model solves the problems that the existing sampler for the air pulverized coal pipeline is larger in size, heavier in whole and complicated to operate. Comprising a hollow handle, a switch valve, a base, a filter body and a sample bottle, the switch valve is connected between the hollow handle and the base, one end, far away from the switch valve, of the hollow handle is connected with a sampling head through a sampling tube, one end, far away from the switch valve, of the base is connected with an air outlet tube, and the filter body is arranged in the base or the sample bottle. Gas-solid two-phase pulverized coal flows through the switch valve, enters the base and is filtered by the filtering main body, part of pulverized coal is intercepted and falls into the sample bottle, and the rest of pulverized coal and gas penetrate through the filtering main body and then are discharged through the gas outlet pipe. The pulverized coal sampling device is simpler in structure, lighter in weight and lower in production cost and sampling cost, meanwhile, the whole pulverized coal sampling process is connected through a pipeline, pulverized coal airflow leakage is effectively avoided, and then working environment pollution is effectively avoided.

The present application relates to a combustion system of a pulverized coke and pulverized coal dual fuel boiler and a combustion method thereof, and belongs to the technical field of boiler production design. The present application solves the technical problems of the existing pulverized coke utilization mode, i.e. mixing and burning pulverized coke as a fuel of a thermal power plant with coal, which requires special structural design or modification of the mixing and burning system, and the mixing and burning mode also has the problems of poor combustion stability, increased fly ash content and the like. In the pure pulverized coke mode, hot primary air passing through an air preheater carries high-temperature pulverized coke added by a rotary feeding valve into a pulverized coal burner, and hot secondary air and the pulverized coke primary air are combusted through the burner. In the pure pulverized coal mode, pulverized coal dried and ground by a coal mill is sent into the burner through a pulverized coal pipeline, and hot secondary air and the pulverized coal primary air are combusted through the burner. The present application can quickly switch between the two combustion modes of pure pulverized coke and pure pulverized coal, thereby improving the flexibility of the fuel of a power station boiler.

The invention discloses an intelligent monitoring and fault diagnosis system for pipeline coal transportation, and belongs to the technical field of pipeline coal transportation. The system comprises a data acquisition module which is used for monitoring pipeline pressure, flow, coal components and pipeline wall thickness key parameters in real time; the data transmission module is used for performing arrangement and format conversion on the data acquired by the sensor; the big data analysis and machine learning model training module is used for receiving the converted data, learning and training historical fault data and normal operation data by using a machine learning algorithm, and constructing a fault diagnosis model; the fault diagnosis analysis module is used for applying the trained fault diagnosis model to actual monitoring; and the fault positioning and alarming module is used for determining the specific position of the fault according to the diagnosis result and triggering an alarming mechanism. According to the invention, the fault diagnosis model is trained through a machine learning algorithm, the pipeline coal conveying data collected in real time can be accurately and rapidly analyzed, and the type and position of a potential fault can be found and identified in time.

The invention provides a tooth-shaped thick-thin separation direct-current burner for ultra-low load stable combustion, and relates to the technical field of power station boilers. The problems that existing equipment is poor in fuel adaptability and cannot meet the deep peak regulation requirement are solved. The pulverized coal burner comprises a pulverized coal pipeline inlet elbow, a pulverized coal nozzle body shell, a burner nozzle and a thick-thin separation device, one end of the pulverized coal nozzle body shell is connected with the pulverized coal pipeline inlet elbow, a rotating shaft is arranged in the other end of the pulverized coal nozzle body shell in the radial direction, and the burner nozzle is connected with the pulverized coal nozzle body shell through the rotating shaft. The thick-thin separation device is arranged in the pulverized coal nozzle body shell; the thick-thin separation device is axially provided with a contracted through hole used for converging airflow, the thick-thin separation device is circumferentially and uniformly provided with notches for separating the device into a plurality of parts to form a tooth-shaped structure which is circumferentially and uniformly arranged, and the notches are used for the airflow to pass through. The device is mainly used for realizing ultralow-load stable combustion of the boiler.

The invention relates to the technical field of thermal power generation, and provides a fine control method and system for the combustion state of a boiler burner, and the control method comprises the steps: S1, a monitoring step: employing a non-contact measurement mode, and obtaining the flow velocity parameters and concentration parameters of pulverized coal in a plurality of pulverized coal pipelines at the outlet of each coal mill of a boiler in real time; s2, an analysis step: comparing the flow velocity parameter and the concentration parameter with preset reference values, and analyzing pulverized coal distribution deviation among the pulverized coal pipelines; s3, an adjusting step: generating an adjusting instruction based on the pulverized coal distribution deviation, and controlling the opening degree of a pulverized coal flow balancing valve mounted on the pulverized coal pipeline so as to adjust the pulverized coal flow velocity and concentration among the pipelines; and S4, an early warning step: monitoring the opening degree of the pulverized coal flow balancing valve and the corresponding pulverized coal flow speed in real time, and generating and sending out an anti-blocking early warning signal when a preset blocking risk condition is identified to be met. Through cooperation of monitoring, analysis, adjustment and early warning steps, precise control over the combustion state is achieved.

The invention discloses a primary air pulverized coal pipeline sampling device and method, and belongs to the technical field of boiler pulverized coal detection.The device comprises a sampling module, an intelligent self-cleaning module, an anti-explosion control module and a linkage control module, and the intelligent self-cleaning module is connected with the sampling module; the linkage control module is arranged in the explosion-proof control module and is electrically connected with the explosion-proof control module, and the explosion-proof control module is connected with the sampling module and the intelligent self-cleaning module. According to the invention, the defects of contradiction between constant-speed sampling precision and equipment service life, poor coordination of self-cleaning and sampling actions and insufficient stability under complex working conditions of the existing pulverized coal pipeline sampling equipment can be overcome.

The utility model relates to a coal-fired unit load adjusting system. The coal-fired unit load adjusting system comprises a coal mill unit and a load adjusting device, wherein the coal mill unit comprises a first type of coal mills and a second type of coal mills; the pulverized coal burner group comprises a first type of pulverized coal burners and a second type of pulverized coal burners, the first type of pulverized coal burners correspond to and are communicated with the first type of coal mills, the second type of pulverized coal burners correspond to and are communicated with the second type of coal mills, and a second type of pulverized coal pipeline is provided with an adjusting turn-off device; a powder-containing burner; and the pulverized coal classifier is connected to the second-class coal mill through a second-class pulverized coal pipeline, and is connected to the pulverized coal-containing burner, the first-class pulverized coal burner and the second-class pulverized coal burner through the second-class pulverized coal pipeline, so that pulverized coal is controllably conveyed in a working state. In this way, the load of the coal-fired unit can be rapidly adjusted.