115 results about "Coal pipeline" patented technology

The invention relates to a system and a method for quickly adjusting the load of a coal-fired unit. The system for quickly adjusting the load of the coal-fired unit comprises a coal mill unit, a first-class coal mill and a second-class coal mill, 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; the position of the adjusting turn-off device on the second-class pulverized coal pipeline is adjustable; a powder-containing burner; and the pulverized coal classifier is connected to the second-class coal mill through a second-class pulverized coal pipeline so as to receive pulverized coal, 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 as to controllably convey the pulverized coal in a working state. In this way, the load of the coal-fired unit can be rapidly adjusted.

The utility model provides a primary air powder concentration measuring device and a heat supply system, and belongs to the technical field of concentration measurement, and the device comprises an electrostatic loading system which is used for carrying out charge loading treatment on electrostatic ions on the surfaces of all pulverized coal particles when a power plant is in a low load state, so that all the electrostatic ions reach a saturated state; each electric charge quantity measuring sensor is used for measuring the total electric charge quantity of the static ions reaching the saturation state; each signal detection sensor is used for detecting charges generated when the static ions reaching the saturation state flow through and generating electric signals; and the controller is used for calculating the pulverized coal mass flow according to the electric signal generated by the signal detection sensor, and calculating the primary pulverized coal concentration in the pulverized coal pipeline according to the total charge quantity of the electrostatic ions and the pulverized coal mass flow. According to the scheme, the primary air powder concentration can be accurately measured under the condition of low load of the power plant.

The invention discloses a coal-fired boiler ammonia-doped combustion system and method based on high-temperature strong reduction, and belongs to the technical field of boiler combustion. A main combustion area and an original over fire air area are sequentially arranged in the ammonia coal blending combustion boiler body from bottom to top; a primary air nozzle and a secondary air nozzle are mounted in the main combustion area; the primary air nozzle is respectively connected with a pulverized coal pipeline, an ammonia gas pipeline and a primary air pipeline through a four-way joint; the secondary air nozzle is respectively connected with a combustion-supporting oxygen pipeline and a secondary air pipeline through a three-way joint; an original over-fire air nozzle and a high over-fire air nozzle are mounted in the original over-fire air area; the original over-fire air nozzle and the high over-fire air nozzle are connected with an over-fire air pipeline; according to the ammonia-doped combustion system and method for the coal-fired boiler based on high-temperature strong reduction, oxygenation combustion and the deep air classification technology are coupled, and the internal contradiction problem that the theoretical combustion temperature of ammonia is low and the risk that NOx emission exceeds the standard is large is solved.

The present invention provides a method for leveling the air and pulverized coal in a tangentially fired boiler with four-corner tangential burners. The present invention includes a four-drive leveling valve device and, based on the on-line measurement data of air and pulverized coal, the central controller adjusts the opening combinations of the four-drive leveling valves to level the air and pulverized coal velocities and concentrations in each air and pulverized coal pipeline, so as to ensure the balanced output of each layer of burners during the operation of the tangentially fired boiler with four-corner tangential burners, which is of great significance to the safety and economy of the boiler.

The present invention relates to a pulverizing system and method. The system is mounted in a boiler system and comprises: an air-powder-homogenizing coal mill, which is connected to the boiler system through a plurality of coal-powder pipelines; a coal-powder concentration regulating valve, a coal-powder flow regulating valve, a coal-powder concentration detection sensor and a coal-powder flow detection device are sequentially installed on each coal-powder pipeline from the end close to the air-powder-homogenizing coal mill to the end of the boiler system; an industrial computer is equipped with a control system, which is connected to the air-powder-homogenizing coal mill, the coal-powder concentration regulating valve, the coal-powder flow regulating valve, the coal-powder concentration detection sensor, the coal-powder flow detection device, and the furnace flame detection sensor, the flue gas fly ash carbon content detection sensor, and the flue gas NO detection sensor in the boiler system. X The detection sensor is electrically connected to the flue gas CO detection sensor. By comparing the target values ​​of the industrial computer, combined with the coal powder concentration, flow detection signals and coal quality conditions on each coal powder pipeline, instructions are issued to each actuator, reducing the air-powder deviation in each coal powder pipeline and achieving refined control.

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.

The invention belongs to the field of robots, and particularly relates to an European silo coal conveying pipeline cleaning robot which comprises a body, a visual detection part, a cleaning part, three sets of moving wheels and a support, the body comprises a front body and a rear body which are independent, the front body can rotate relative to the rear body, the support is connected to the front end of the front body, and the visual detection part is connected with the cleaning part. The bracket is umbrella-shaped; the cleaning part comprises two water sprayers, a water pipe and two hoses, the two water sprayers are symmetrically arranged on the support, the water pipe is arranged in the body and penetrates through the front body and the rear body at the same time, the front end of the water pipe is communicated with one ends of the two hoses, and the other end of the water pipe is communicated with the other ends of the two hoses. The other end of each hose is correspondingly communicated with a water inlet of one water spray head; the visual detection part is arranged on the bracket; each group of moving wheels and the rear body are connected through a radial telescopic frame, and the radial telescopic frame can stretch out and draw back in the radial direction.

The utility model provides a coal combustion system for a cement production line, which comprises at least two raw coal storage bins for storing raw coal with different qualities, a conveying device arranged below the raw coal storage bins, a coal grinding device arranged at one end of the conveying device far away from the raw coal storage bins and comprising a hot air inlet and a pulverized coal outlet, the pulverized coal outlet is communicated with a bag dust collector through a first pulverized coal pipeline, an air exhaust windmill is arranged on one side of the bag dust collector and used for exhausting air in the bag dust collector, pulverized coal storage bins corresponding to the raw coal storage bins are arranged at the bottom of the bag dust collector, and a second pulverized coal pipeline is correspondingly arranged at the bottom of each pulverized coal storage bin. According to the coal powder conveying device, through different conveying paths, raw coal of different qualities is ground and then conveyed into the corresponding combustors to be combusted, the efficiency is high, and the coal cost is saved.

The invention provides a tangential combustion boiler capable of eliminating residual rotation momentum at a hearth outlet, and relates to the technical field of coal-fired power plant boiler flow field optimization and smoke temperature deviation treatment. Comprising a hearth, a multi-layer corner-type arranged direct-flow burner, a wall-type arranged turbulent burner, a pulverized coal connecting pipe, a plurality of stop valves, a pulverized coal pipeline, a temperature measuring system and a flow velocity measuring system. The multi-layer angle-type arranged direct-flow combustors and the wall-type arranged rotational-flow combustors are arranged, and the two sets of devices are used in a matched mode. Therefore, the problems that in an existing corner tangential combustion boiler, due to smoke residual rotation, over-temperature and abrasion of a tube panel cause large interference on safe operation of the boiler, and local dust accumulation of a horizontal flue, a furnace arch, a tail vertical shaft and other parts can be caused by the difference of smoke flow velocity distribution are effectively solved; the normal operation of the denitration devices on the two sides is influenced.

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 present invention discloses a supercritical boiler flexible peak shaving system and method. The cold inlets of the steam boiler water heaters are respectively connected to the outlet of the main pipe of the economizer outlet and the lower header of the water wall. The steam pulverized coal heater is arranged on the primary air pulverized coal pipeline. The inlet and outlet of the hot steam extraction pipeline are respectively connected to the hot reheat steam header and the hot inlet of the steam boiler water heater. The hot outlet of the steam boiler water heater is connected to the hot inlet of the steam pulverized coal heater, and the hot outlet of the steam pulverized coal heater is connected with a waste steam pipeline. The present invention overcomes the problem of a relatively high wet state conversion load during the ultra-low load operation of a supercritical boiler. Under the condition that the unit is in ultra-low load operation and the boiler needs to be converted to wet state operation, the boiler water from the economizer outlet to the lower header of the water wall is heated, the ignition environment of pulverized coal is improved, and the conversion to wet state is postponed during the load reduction process; the primary air pulverized coal airflow is heated by steam, the temperature of the pulverized coal airflow is increased, the ignition heat of the pulverized coal is reduced, and the combustion stability is improved.

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.

The utility model discloses a system for replacing an oxygen pipeline of a gasification furnace by adopting medium-pressure superheated steam, which is characterized in that a pulverized coal pipeline and the oxygen pipeline are both connected to a gas inlet of a coal burner of the gasification furnace, a high-pressure nitrogen pipeline is connected to the oxygen pipeline, and the oxygen pipeline is connected to the coal burner of the gasification furnace through an oxygen-steam mixer; a first feeding port of the oxygen and steam mixer is connected with an oxygen pipeline and a high-pressure nitrogen pipeline, a second feeding port of the oxygen and steam mixer is connected with a medium-pressure superheated steam pipeline, and the medium-pressure superheated steam pipeline is sequentially provided with a hand valve, a steam filter, a second adjusting valve and a fifth switch valve in the material flowing direction. And a discharge hole of the oxygen-steam mixer is connected to a gas inlet of the coal burner through a replacement section oxygen pipeline. The medium-pressure superheated steam system is used for replacing a high-pressure nitrogen system to replace the oxygen pipeline of the gasification furnace, so that the fluctuation of nitrogen can be reduced, the safety of the replacement pipeline is ensured, and the content of nitrogen in crude synthesis gas can be obviously reduced.

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 utility model relates to a pulverized coal and air mixing device, which is applied to the technical field of pulverized coal conveying and mixing, solves the problems that the existing pulverized coal conveying is easy to be interrupted and discontinuous, and the conveying efficiency is reduced, and comprises a mixing barrel, the coal feeding assembly comprises a first pulverized coal pipeline and a second pulverized coal pipeline which are arranged at the feeding end of the mixing barrel, the discharging switching assembly comprises a blocking plate blocking the discharging end of the first pulverized coal pipeline and a driving part driving the blocking plate to move, and the length of the blocking plate is equal to the distance between the axis of the first pulverized coal pipeline and the axis of the second pulverized coal pipeline. A driving piece drives a blocking plate to move from the discharging end of the first pulverized coal pipeline to the discharging end of the second pulverized coal pipeline so that switching of opening and closing of the discharging end of the first pulverized coal pipeline and the discharging end of the second pulverized coal pipeline can be achieved. The air supply assembly is used for charging air into the mixing barrel; the pulverized coal conveying device has the effects that pulverized coal can be continuously conveyed into the mixing barrel, the phenomenon of discontinuous pulverized coal conveying is avoided, and the pulverized coal conveying efficiency is improved.

The invention belongs to the technical field of coal combustion equipment, and relates to a rotational flow combustion device and method for ammonia-doped coal combustion, and the rotational flow combustion device comprises a pre-combustion chamber, a combustion chamber, a pulverized coal pipeline, an ammonia pre-decomposition chamber, an ammonia preheating chamber and an ammonia gas supply assembly; and the conveying assembly is arranged on the recirculation flue gas pipe and used for conveying the high-temperature flue gas generated in the combustion chamber into the ammonia preheating chamber to heat the ammonia gas. High-temperature flue gas in the combustion chamber can be conveyed into the ammonia preheating chamber to heat ammonia gas, the heated ammonia gas enters the ammonia pre-decomposition chamber and is decomposed into hydrogen and nitrogen under the action of an ammonia decomposition catalyst, the ignition temperature of the ammonia gas is reduced, normal combustion of the ammonia gas is guaranteed, and meanwhile on the basis of the turbulent burner, the combustion efficiency is improved. Compared with the prior art, a tertiary air pipeline of an original turbulent burner is transformed into the ammonia gas pre-decomposition chamber, adding of combustion-supporting air is reduced, original airflow distribution is prevented from being disturbed, the combustion efficiency of pulverized coal is improved, the content of oxygen is reduced, and generation and emission of NOx are reduced.

The invention discloses a method for predicting the service life of a long-distance coal conveying pipeline. The method comprises the following specific steps: step 1, selecting an easily-corroded part in the long-distance coal conveying pipeline as a key detection position; step 2, performing contact type quantitative detection on the pipe body at the key detection position in the step 1, obtaining the maximum abrasion depth d of the pipeline at each key detection position, and calculating the maximum abrasion rate r of the pipeline according to the maximum abrasion depth d of the pipeline; 3, calculating the minimum allowable wall thickness t of the pipeline at each key detection position in the step 1; 4, calculating the service life of the pipeline at each key detection position according to the maximum abrasion rate r of the pipeline and the minimum allowable wall thickness t of the pipeline, and selecting the minimum service life as the service life N of the long-distance pipeline; the method does not need to excavate and backfill all pipelines, is low in detection cost, does not damage the pipelines, does not need to stop production, and does not affect normal production operation.

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 relates to the technical field of coating surface micro-pit preparation, and discloses a composite ceramic coating surface micro-pit preparation device which comprises a bottom plate and further comprises an L-shaped frame, an L-shaped support, a first support, a second support, a third support, a fourth support and a fourth support, and the vertical edge of the L-shaped frame is fixedly installed at the top of the bottom plate; the micro-pit etching assembly is arranged on the transverse edge of the L-shaped frame, and the micro-pit etching assembly is used for etching the composite ceramic coating; the transferring assembly is arranged at the top of the bottom plate, and the transferring assembly is used for transferring the pulverized coal pipeline coated with the composite ceramic coating to prepare the micro pit; and the detection assembly is arranged at the top of the bottom plate, and the detection assembly is used for detecting whether micro pits in the surface of the pulverized coal pipeline are punctured or not. According to the equipment, after the micro-pits are etched in the pulverized coal pipeline coated with the composite ceramic coating, the micro-pits can be automatically detected, the situation that the composite ceramic coating is punctured, and the protection effect on the pulverized coal pipeline is poor is avoided, and then the micro-pit quality of the equipment on the pulverized coal pipeline is improved.

The invention discloses a premixing gradually-shrinking side-blowing multi-pore-channel structure chaos stirring spray gun, and relates to the technical field of thermometallurgy, the premixing gradually-shrinking side-blowing multi-pore-channel structure chaos stirring spray gun comprises a gradually-shrinking type pulverized coal pipeline, a spraying nozzle and a spraying nozzle, the first spray gun outer pipe is arranged on the outer sides of the multiple flow guide ridges in a sleeving mode, every two adjacent flow guide ridges, the outer side face of the gradually-shrunk pulverized coal pipeline and the inner side face of the first spray gun outer pipe define a gradually-shrunk gas flow channel, and the sectional area of the gradually-shrunk gas flow channel is gradually reduced from the inlet end to the outlet end; the oxygen-enriched gas disperses airflow through a plurality of tapered gas flow channels to form fine and uniform bubble groups, and the flow speed is increased; the oxygen-enriched gas in the bubble state is beneficial to increasing the gas-liquid and gas-solid contact area in the molten pool and improving the mass transfer effect, the oxygen-enriched gas with the high flow rate can penetrate through a slag layer after being sprayed into the molten pool, fluid is guided to do chaotic motion in the molten pool, the gas-slag mixing uniformity is improved, and therefore the stirring effect and the reaction rate are improved.

The utility model discloses a combustion data sampling system for a variable coal type W flame boiler, which comprises a coal mill and a combustor, a pulverized coal pipeline is connected between the coal mill and the combustor, a sampling pipeline is mounted on the pulverized coal pipeline, the sampling pipeline is used for sampling pulverized coal to be combusted in the pulverized coal pipeline, and the sampling pipeline is used for sampling the pulverized coal to be combusted in the pulverized coal pipeline. The output end of the sampling pipeline is connected to the coal quality online detection device; a sound wave emission receiver is installed in a hearth of the combustor and connected with the industrial personal computer. According to the utility model, the pulverized coal sampling device before combustion and the acoustic wave temperature measuring device after combustion are additionally arranged in the boiler system, so that data support is provided for boiler flue gas composition and temperature detection.

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 wear-resistant coal injection elbow, a coal injection elbow pipe and a disassembly and assembly method, and belongs to the technical field of pulverized coal pipelines. The wear-resisting coal injection elbow comprises a bent-pipe-shaped metal pipe body, an opening area is formed in the outer bent side of the metal pipe body, an arc-shaped ceramic sheath is buckled to the opening area, an outer cover is buckled to the outer side of the ceramic sheath, the outer cover is used for pressing and limiting the ceramic sheath, and the outer cover is fixedly arranged on the outer bent side of the metal pipe body; the ceramic sheath is independently arranged and buckled in the opening area of the metal pipe body instead of being pasted in the pipe as a lining, so that the limitation of the inner diameter of the elbow on the ceramic thickness is broken through, the thicker ceramic sheath can be selected according to the wear requirement, and the problems that the traditional lining ceramic is thinner in wall thickness and short in service time are solved; meanwhile, the pressing and limiting of the outer cover on the ceramic sheath replaces the pure pasting and fixing, the binding force of the ceramic and the metal pipe body is greatly improved, and the problem of wear resistance failure caused by the fact that the lining ceramic falls off due to washing is solved in cooperation with the limiting of the opening area.

The invention discloses a W-flame boiler wide-load adjusting coal pulverizing system which comprises a plurality of coal mills communicated with a W-flame boiler, each coal mill is provided with a plurality of coal milling outlets, each coal milling outlet is connected with a large pulverized coal pipeline, and each coal milling outlet is provided with a coal mill outlet insertion plate door. A plurality of large pulverized coal pipelines are arranged in the W flame boiler hearth, a pulverized coal distributor is further arranged at an outlet of each large pulverized coal pipeline, each pulverized coal distributor is connected with two small pulverized coal pipelines, each small pulverized coal pipeline is connected with a burner, and the small pulverized coal pipelines communicated with the coal mill are connected with the two sides of the W flame boiler hearth respectively. And the small pulverized coal pipelines on each coal mill are sequentially and alternately connected with the W flame boiler hearth one by one in the arrangement direction of the multiple coal mills. According to the method, the water cooling wall tension fracture caused by thermal load deviation can be effectively avoided, stable combustion of the whole hearth is achieved, the lowest stable combustion load without oil of low volatile coal types is smaller than 25%, and the wide load adjusting capacity of a boiler unit is greatly improved.

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.