31 results about "Boiler design" patented technology

The invention discloses a boiler design file intelligent identification system and method based on a multi-modal knowledge graph. The method comprises the steps that S1, a data collection module is used for collecting a large number of existing boiler design files as a data set; s2, extracting information on the boiler design drawing in the data set by using a multi-modal feature extraction module to form a text-image multi-modal joint feature vector; s3, constructing a multi-modal boiler design knowledge graph with engineering semantics, graph structure association and reasoning capability; and S4, inputting the extracted key point information on the boiler design drawing to be examined into the knowledge graph model, and judging whether each design point meets the design specification requirements of the boiler drawing or not. According to the method, the identification period is greatly shortened, the working efficiency is improved, and the missed examination rate is remarkably reduced.

The utility model discloses a condensation integrated steam boiler, which relates to the technical field of steam boiler design, and comprises an installation fixing plate, a residual smoke condensation utilization unit and a heating use unit, four corners of the lower side surface of the installation fixing plate are respectively and fixedly connected with a support leg, and the upper side surface of the installation fixing plate is fixedly connected with a steam boiler protection shell. A heating use unit is arranged in the steam boiler protection shell, the residual smoke condensation utilization unit comprises a smoke exhaust pipeline, a stable supporting rod, a purification filter element, a power pump, a smoke inlet pipeline and a recycling box, a smoke exhaust port is formed in the right side surface of the mounting fixing plate, and the smoke exhaust port extends into the steam boiler protection shell. The generated flue gas can be treated, the environment is prevented, the flue gas also has a relatively high temperature, heat in the flue gas is utilized, energy is saved, and the use efficiency is improved.

The invention relates to the field of boiler control, and discloses an ultra-supercritical boiler control method and system with a dynamic overtemperature early warning function. Comprising the following steps: generating a dimensionless dynamic state description set based on boiler design parameters and real-time sensor data; and according to the three-dimensional grid division of the heating surface, when the gradient exceeds a safety threshold, generating an early warning signal carrying a space coordinate, thereby realizing early-stage accurate positioning of the risk. Generating a proportional gain parameter based on the early warning position weight and the overtemperature probability value, and offsetting the execution delay through phase lead compensation; and updating sensor data after executing the instruction, and generating a closed-loop convergence mark when the detection state change rate is lower than a threshold value, thereby realizing control stability verification. According to the invention, the traditional static threshold alarm and manual intervention mode is broken through, the conversion from passive alarm to active suppression is realized, and the pipe explosion risk under the working condition of deep peak regulation is obviously reduced.

This invention belongs to the field of natural language processing and information extraction technology, and provides a method and system for extracting parameters from boiler design documents based on multi-round self-feedback RAG. The method includes: preprocessing the boiler design document and the original query, converting them into several text segments and expected inputs respectively; encoding the text segments and expected inputs into high-dimensional vectors and query vectors respectively, storing the high-dimensional vectors and constructing a vector index; generating a response based on retrieved external knowledge to assist a large language model, and iteratively optimizing the generated results through multiple rounds. This invention effectively solves the problems of incorrect and missing parameter extraction in complex or fuzzy query scenarios, significantly improving the reliability of the final results; it overcomes the limitations of traditional methods and standard large language models in handling multimodal data, enhancing the processing capability for complex multimodal documents; and it improves the accuracy of information retrieval, laying a solid foundation for subsequent accurate parameter extraction.

The application provides a high-temperature gas cooled reactor type supercritical ultra-supercritical boiler steam generator, which comprises a shell and a heat exchange device arranged in the shell, a maintenance space for people to enter is arranged between the shell and the heat exchange device, the shell is provided with a hot helium gas inlet and a cold helium gas outlet connected with a reactor, and the application further comprises a helium gas isolation valve for opening and closing the hot helium gas inlet and the cold helium gas outlet. In this way, since the helium gas isolation valve can close the hot helium gas inlet and the cold helium gas outlet, the helium gas passage with the reactor can be cut off in an accident, and the supply of high-temperature helium gas is stopped, so that the safety level of the steam generator is reduced, the steam generator is no longer limited by the nuclear power safety I level design and manufacturing specification, and the thermal power boiler design and manufacturing specification can be used. Moreover, the helium gas cannot be activated, the radiation dose inside the boiler steam generator is very low, and personnel can enter the maintenance space to check and maintain the boiler steam generator.

The invention discloses a coal economizer with wear-resisting and protecting effects for a hot water boiler, and relates to the technical field of boiler design and production, the coal economizer comprises a steel frame, a heat exchange tube bundle is arranged in the steel frame, a water inlet pipe and a water outlet pipe are arranged on the heat exchange tube bundle, and fins are arranged on the surface of the heat exchange tube bundle. The fins are used for enlarging the contact area of flue gas and the heat exchange tube bundle, high-temperature flue gas is in direct contact with the heat exchange tube bundle for heat exchange, the fins arranged on the surface of the fins can effectively enlarge the contact area of the flue gas and the heat exchange tube bundle, heat transfer is more sufficient, and the heat exchange efficiency is improved by forming gap channels with the uniform size. Particulate matters larger than a preset size in flue gas can be continuously intercepted, so that the service life of a surface coating of a heat exchange tube bundle is prolonged, and a basic guarantee is provided for subsequent efficient heat exchange.

The present invention discloses a method for reducing slagging and fouling of high-temperature heating surfaces of boilers, which comprises the following steps: 1. Defining the position of the flue gas window at the furnace outlet; 2. Obtaining the basic coal quality parameters of the coal sample, including V daf , S t,ar , A d %, ST, coal ash component values (Fe2O3, CaO, MgO, Na2O, K2O), Cl ar ; 3. Determining the flue gas temperature at the furnace outlet according to the coal quality parameters of the steam coal; 4. Determining the flue gas temperature at the bottom of the platen according to the coal quality parameters of the steam coal. The method of the present invention is simple and fast, and is obtained through a large number of evaluations, researches and calculations on the matching of boiler design, fuel characteristics and boiler operation results. It has high engineering application value and can guide the design, operation optimization of pulverized coal boilers and the blending of fuels fed into the furnace. It can reduce the slagging and fouling of the platen superheater and the high-temperature heating surfaces of the horizontal flue, and improve the safety of boiler operation.

The invention discloses a method and device for predicting original emission of nitrogen oxide of a direct-current burner boiler, belongs to the technical field of coal-fired boiler pollutant control, and particularly relates to the technical field of prediction of the original emission of the nitrogen oxide of the direct-current burner boiler. The problem that prediction precision is limited due to the fact that a prediction model depends on big data forced fitting and lacks theoretical basis and physical significance in the prior art is solved. The method comprises the step of adding the fuel type nitrogen oxide concentration and the thermal type nitrogen oxide concentration to obtain a predicted value of the original emission concentration of the nitrogen oxide. The method and the device for predicting the original emission of the nitrogen oxides of the direct-current burner boiler are suitable for evaluating the emission potential of the nitrogen oxides of different coal types in the boiler design and model selection stages of a coal-fired power plant and rapidly predicting the emission change when the coal types of the existing direct-current burner boiler are replaced. And key data support is provided for environmental protection facility configuration and operation optimization.

The utility model belongs to the technical field of wastewater reuse, and discloses a PTA boiler periodic blowdown device which comprises a blowdown cooling pool, an industrial water pipe, a blowdown lifting pump and a blowdown lifting assembly, the blowdown cooling pool is divided into two paths, one path is a conventional sewage pipeline, the other path is connected into a factory circulating water pipe network and merged into a circulating water pool, and the industrial water pipe is connected with the industrial water pipe. The blowdown cooling pool is communicated with boiler emergency drain water, deaerator drain water, water supply tank drain water, economizer drain water, superheater drain water, continuous drain water and definite drain water, and is communicated with the blowdown cooling pool through a flash tank; the industrial water pipe is a path of normal-temperature production industrial water, the boiler design rated load is 240 t / h, the boiler design blowdown rate is 2%, boiler emergency drainage, deaerator drainage, water supply tank drainage, economizer drainage, superheater drainage and the like are adopted, regular blowdown is achieved, the boiler blowdown wastewater recycling system is matched with design and transformation, the wastewater treatment cost is reduced, and the energy consumption is reduced. And water resources are saved.

The application discloses a coal economizer with wear-resistant protection effect for a hot water boiler and relates to the technical field of boiler design and production. The coal economizer comprises a steel frame, a heat exchange tube bundle is arranged in the steel frame, water inlet pipes and water outlet pipes are arranged on the heat exchange tube bundle, fins are arranged on the surface of the heat exchange tube bundle, the fins are used for expanding the contact area of flue gas and the heat exchange tube bundle, high-temperature flue gas directly contacts the heat exchange tube bundle to exchange heat, the fins arranged on the surface of the heat exchange tube bundle can effectively expand the contact area of flue gas and the heat exchange tube bundle, heat transfer is more sufficient, a gap channel with uniform size is formed, and particles larger than a preset size in flue gas can be continuously intercepted, and thus the service life of the surface coating of the heat exchange tube bundle is prolonged, and a basic guarantee is provided for subsequent efficient heat exchange.

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 relates to the technical field of boiler design, and particularly discloses a modularized boiler radiation heat exchanger which comprises a platen superheater tube panel, an inlet header assembly connected with the inlet end of the platen superheater tube panel and an outlet header assembly connected with the outlet end of the platen superheater tube panel. The platen superheater tube panel comprises a plurality of groups of heating surface modules which are respectively connected with the outlet header assembly and the inlet header assembly; and each group of heating surface module comprises a plurality of groups of heating modules which are sequentially stacked along the flow direction of flue gas. Under the condition that a throttling hole is not adopted, the steam-water resistance and the wall temperature deviation of the heating surface are reduced at the same time, the manufacturing difficulty of the heating surface and the header is reduced, and under the condition that the average mass flow rate is the same, the resistance of the heating surface can be reduced.

The application relates to the field of boiler design, and discloses a method suitable for reducing the wall temperature of a low-temperature superheater of a boiler, wherein the boiler comprises five coal mills A, B, C, D and E, burners arranged in a four-corner tangential circle mode, and four overfire air dampers respectively arranged at four corners of the upper portion of a furnace and divided into six layers, the overfire air is divided into four layers SA, SB, SC and SD, and the method comprises the following steps: S1, adjusting the running combination of the coal mills and the opening degree of the overfire air dampers according to the load condition of the boiler; S2, improving the residual rotation condition of the flue gas at the outlet of the boiler, so that the tail flue gas temperature is uniformly distributed; and S3, eliminating the unevenness of the flue gas temperature, reducing the overall flue gas temperature, and reducing the wall temperature of the low-temperature superheater. According to the method, the running combination of the coal mills and the opening degree of the overfire air dampers are adjusted according to the load, the residual rotation condition of the flue gas at the outlet of the boiler is improved, the tail flue gas temperature is uniformly distributed, the unevenness of the flue gas temperature is eliminated, the overall flue gas temperature is reduced, and the wall temperature of the low-temperature superheater is reduced.

The invention discloses a W-flame ultra-supercritical boiler for burning anthracite and an operation control method, and belongs to the technical field of design and manufacturing of power station boilers. The boiler comprises a combustion system, an air distribution system, a fuel supply system and a steam-water system, the combustion system comprises a hearth and a plurality of combustors, the air distribution system comprises staged air, over fire air, a close-to-wall air nozzle and a close-to-wall air parallel side water cooling wall, the fuel supply system comprises a primary air pipeline and an exhaust pipeline for feeding exhaust in a split mode, and the steam-water system comprises a water cooling wall and a reheater. The water cooling wall is provided with a middle mixing header, the reheater comprises a low-temperature section and a high-temperature section, an accident spray desuperheater is arranged at an inlet and an outlet of the low-temperature reheater, and a cross mixing header is arranged at an outlet. The invention is mainly used for high-efficiency clean combustion power generation of high-sulfur and low-volatile anthracite, and is used for coal-fired power generation of 660MW grade power stations.

The present invention relates to the technical field of boiler water-cooled wall high-temperature corrosion prediction, and specifically discloses a boiler water-cooled wall high-temperature corrosion prediction method based on data fusion and drive, comprising the following steps: S1: collecting target boiler design and operation parameters; S2: constructing an organic sulfur evolution model, a pyrite evolution model and a tube wall temperature coupled heat transfer model; S3: building a boiler water-cooled wall high-temperature corrosion model in combination with a corrosion rate correlation formula; S4: calculating high-temperature corrosion conditions under several different parameters to obtain a typical condition simulation database; S5: constructing a transposed convolutional neural network prediction model based on the database and taking various boiler parameters as input; S6: estimating the degree of thinning of the water-cooled wall surface; the present invention develops a complete water-cooled wall high-temperature corrosion prediction CFD model, which for the first time considers all key parameters affecting the corrosion rate, such as H2S concentration in the water-cooled wall area, FeS deposit distribution on the wall surface and tube wall temperature.

The application discloses an online calculation method and system for oxygen content of each part of a boiler flue. The method establishes an oxygen content calculation model for each part of the boiler flue by measuring the oxygen content at a reference position and the design structure of the boiler, inputs the measured oxygen content data of the reference position of the boiler into the calculation model to obtain the oxygen content values of the rest positions of the boiler flue, and solves the practical problem of insufficient oxygen content online measuring instruments. The system comprises a data acquisition module, a first data processing module and a second data processing module which are connected in sequence. The calculation method does not need to perform heat balance calculation, greatly reduces the measuring points required for online calculation, has a simple calculation process, and has a certain precision in calculation result precision, so that online calculation of the oxygen content of each part of the boiler flue can be realized.

The invention discloses a boiler design method beneficial to long-term low-load operation of a circulating fluidized bed boiler, and belongs to the technical field of circulating fluidized bed boiler design. According to the method, through coupling thermodynamic calculation and fluid dynamic simulation, all superheater heating surfaces are integrally arranged in a hearth, a hearth outlet flue gas temperature prediction value is determined so as to accurately arrange an SNCR spray gun, and a denitration temperature window is ensured; a self-adaptive exhaust gas temperature regulation and control system is installed, a heating surface expansion space is reserved in a coal economizer area, a hot air recirculation loop and an air heater are integrated, and low-temperature corrosion of an air pre-heater is prevented; and a steam soot blowing strategy associated with the load is designed, and the corresponding soot blower layout is configured, so that the problem of tail soot deposition is solved. The system can accurately ensure that the main steam temperature reaches the standard, guarantee the denitration efficiency, prevent the air pre-heater from being corroded, solve the problem of dust deposition at the tail part, realize flexible adaptation of the heating surface of the economizer, effectively solve a series of problems during long-term low-load operation of the circulating fluidized bed boiler, and realize stable, efficient and environment-friendly operation of the boiler under long-term low load.

The invention discloses an oxygen-enriched combustion optimization method and device for a boiler, a medium and equipment, and belongs to the field of boiler combustion. And the parameters are input into a combustion heat transfer coupling module obtained by training based on oxygen-enriched combustion characteristics and a preset combustion simulation algorithm, so that the drying, pyrolysis and combustion reaction processes of the pulverized coal can be accurately simulated, and combustion products are generated. Meanwhile, in combination with boiler design parameters and real-time operation parameters, a heat transfer process between a combustion product and a working medium is simulated, and flue gas temperature and flue gas composition data of each heating surface are output. And on the basis of the data, combustion results under different oxygen-enriched combustion conditions are compared, an optimization instruction used for adjusting the oxygen concentration and the air volume is generated, and oxygen-enriched combustion of the boiler is optimized according to the optimization instruction. The problem that sufficient combustion cannot be accurately and efficiently carried out under the oxygen-enriched condition of the boiler in the prior art is effectively solved.

The invention provides a novel damping type boiler rigid beam arrangement form, and belongs to the technical field of boiler rigid beams. The problems that due to the fact that the design pressure of the boiler is increased, the section of the rigid beam is larger and larger, space is limited, arrangement difficulty is increased, and meanwhile huge cost pressure is caused to a manufacturing enterprise are solved. The device comprises a supporting beam, a plurality of rigid beam sets and dampers, the rigid beam sets are evenly arranged on the outer side of a hearth in a surrounding mode in the vertical direction, each rigid beam set comprises four rigid beams which are connected end to end, the four rigid beams are horizontally arranged on the outer side of the periphery of the hearth respectively, and the dampers are arranged on the outer side of the hearth. Supporting beams are vertically arranged on the outer side of the periphery of the hearth, the supporting beams are arranged on the outer side of the rigid beam set, the supporting beams are connected with the multiple rigid beams located on the same side of the hearth, and a plurality of dampers are arranged on the outer sides of the supporting beams in the vertical direction. The device is mainly used for arranging the boiler rigid beam.

Steam boilers are one of the main consumers for fossil energy. They are widely used in producing electricity through running steam turbines, besides heating or in food factories and many other fields. Steam Boilers design has developed in the last 100 years, and one of the most efficient types are the water tube boilers, which are working at high pressures to maximize efficiency.In this invention, the use of the principle of high pressurized water-steam containers and kinetic energy is optimized in a way to reduce the needed heat energy inside the furnace where the said tank will work as heat energy reservoir. All the water tubes will be circulating inside the said tank, so that the high heat energy stored inside will heat the water tubes transferring the water inside to steam.This invention will reduce the needed fuel supply for the steam boiler's furnace significantly, and this will lead to reducing CO2 emissions, therefore it is considered environment friendly.

This utility model discloses a staggered heating boiler for a coffee machine, including a boiler body, a boiler bottom cover, a coffee handle support, and a heating element placed inside the boiler body. The central axis of the boiler body is not coaxial with the central axis of the boiler bottom cover and is staggered. The boiler body and the boiler bottom cover form a heating water cavity, along with related piping design. This utility model, through its novel boiler design, allows for greater flexibility in the boiler's placement within the coffee machine, minimizes its impact on the top design, and allows for more space and creative design possibilities for the coffee machine's appearance.

The invention discloses a marine auxiliary boiler convection bank design platform, and belongs to the technical field of marine boiler design. In order to solve the problems that an existing design method depends on experience and multi-objective optimization cannot be achieved, the system comprises a tube bundle thermal performance obtaining module, a heat exchange tube bundle thermal performance obtaining module, a heat exchange tube bundle thermal performance obtaining module and a heat exchange tube bundle thermal performance obtaining module, the external constraint and demand input module is used for setting structural parameter constraints and multiple targets such as boiler efficiency, weight, volume and cost; the boiler performance calculation module is used for checking the comprehensive performance of the design scheme; and the structure parameter optimization module is used for converting a multi-objective optimization problem into a single-objective problem to solve by adopting a main objective method, and automatically outputting tube bundle structure parameters which meet constraints and have optimal performance. According to the method, rapid, automatic and global optimization design of the convection bank of the marine auxiliary boiler is realized.

The application discloses a power station pulverized coal boiler high-temperature corrosion on-line real-time monitoring and control method, which comprises the following steps: collecting boiler operation core parameters, furnace combustion zone, near-wall zone flue gas and heating surface tube wall temperature data in real time; constructing a high-temperature corrosion prediction model based on the collected data, combining with boiler design parameters, coal quality characteristics and laboratory high-temperature corrosion test data; dynamically calculating and predicting the corrosion rate of each region of the heating surface and identifying high-risk regions; according to the prediction results, synchronously implementing combustion condition optimization and corrosion inhibitor addition; and simultaneously monitoring the heating surface tube wall state in real time. The measured data and the model prediction results are assimilated and fused through Kalman filtering algorithm to form a closed-loop control system. The application further discloses a power station pulverized coal boiler high-temperature corrosion on-line real-time monitoring and control system. The power station pulverized coal boiler high-temperature corrosion on-line real-time monitoring and control method and system provided by the application solve the problems of high-temperature corrosion prevention and control lag and passive regulation and control in the prior art.

The invention provides a boiler design document parameter extraction method based on retrieval enhancement generation, belongs to the technical field of artificial intelligence information processing, and can at least partially solve the problems of parameter extraction difficulty caused by multi-mode mixed arrangement of existing boiler design documents and context loss and low accuracy of a traditional method. The method comprises the following steps: calling a matched analytical model according to document modal characteristics, and converting multi-modal information into a unified text; performing system-level, paragraph-level and semantic unit-level hierarchical structure division on the text to generate document slices retaining semantic association; and extracting parameter names and numerical values through a large language model by utilizing a retrieval enhancement generation mechanism based on the document slices. According to the method, through multi-modal analysis integration and hierarchical semantic division, the semantic logic of the document is effectively reserved, and high-precision and automatic extraction of the key parameters in the complex engineering document is realized.

The invention belongs to the field of thermal power control, and provides a feedforward control system and method for a thermal power generating unit, and the system comprises a data collection unit which is used for obtaining the operation parameters and load setting parameters of the thermal power generating unit; the correction calculation unit is used for determining the key heat value of the thermal power generating unit and the boiler design efficiency according to the operation parameters and calculating to obtain a boiler efficiency correction coefficient; the state detection unit is used for generating a load control instruction according to the load setting parameters and judging the running state of the thermal power generating unit to obtain a state judgment result; the parameter generation unit is used for determining various parameter correction values of the thermal power generating unit; and the feed-forward control unit is used for generating and correcting a feed-forward control quantity according to the load control instruction, the state judgment result and the various parameter correction values, and performing feed-forward control on the thermal power generating unit according to the corrected feed-forward control quantity. According to the scheme provided by the invention, a multi-parameter comprehensive correction mechanism is utilized, and the control efficiency and the control stability of a feedforward control link are improved.

The utility model discloses a condensation type steam boiler, and relates to the technical field of design and processing of steam boilers. The device comprises a steam boiler, and a heat energy recovery unit used for recovering and utilizing waste heat is arranged on one side of the steam boiler. A conduit; the gas preheating piece is arranged on one side of the steam boiler, and the guide pipe is communicated with the gas preheating piece; and the liquid preheating piece is arranged on one side of the gas preheating piece, and the guide pipe is communicated with the liquid preheating piece. According to the device, the gas preheating piece and the liquid preheating piece are combined for use, heat of waste gas can be extracted to the maximum extent, waste of waste heat resources is avoided, combustion air entering the boiler and water entering the boiler are preheated, the preheated water improves the thermodynamic cycle efficiency of the boiler, and the energy consumption of the boiler is reduced. And the preheated air is beneficial to more sufficient combustion of the fuel, so that the heat efficiency of the boiler is improved, and the requirements of users are met.

The invention concerns an industrial steam boiler designed to burn mixed solid fuels with moisture content above 40%. The boiler includes a post-combustion chamber that operates on natural gas or a mixture of natural gas and green hydrogen. Fuel and Combustion Characteristics: Fuel type: wood sawdust, wood chips, bark, cardboard, paper shreds, shredded plastic material, and plastic film waste Fuel consumption: ~ 3200 kg / h (±10%) Fuel size: 300-400 mm Primary air flow: 1000 m3 / h Secondary air flow: 3500 m3 / h Excess air factor: 1.2-1.3 Grate thermal load: 800-1500 kW / m2 Furnace thermal load: 200-465 kW / m3 Combustion Temperatures Steam boiler: 10 t / h, 15 bar Combustion chamber temperature: 981°C Post combustion chamber temperature: 1280°C Emissions Monitoring, includes: flow, pressure, temperature, dust (mg / Nm3), humidity, and gas composition Continuous emissions monitoring system compliant with environmental law Stack gas temperature: 150-220°C Combustion Plant Layout: Lower combustion chamber (A) and upper post combustion chamber (B), uses preheated primary and secondary air, Post combustion uses natural gas or natural gas + green hydrogen, Fuel Preparation and Feeding: Hydraulic feeder reduces moisture through pre drying and pre heating Improved Combustion: Fluidized bed grates for efficient burning of high moisture fuels, "Lens ring" element improves combustion speed and efficiency, Meets NOx emission requirements Post Combustion System: Uses natural gas or natural gas + green hydrogen for final oxidation of remaining gases Mechanical and Thermal Design: Custom mobile grate drive, Optimized primary / secondary air distribution Cooling water distribution for high thermal load Durable high efficiency refractory lining

The invention discloses a boiler high-temperature heating surface arrangement system for improving low-load economy of a coal-fired unit, and relates to the technical field of power station boiler design and optimization. The problem that in the prior art, when a boiler operates at a low load, due to the fact that the heat exchange temperature and pressure of a high-temperature reheater are insufficient, the reheat steam temperature is obviously reduced, and then unit power supply coal consumption is too high is solved. A high-temperature superheater heating surface tube panel (2) and a high-temperature reheater heating surface tube panel (5) are simultaneously arranged in a high-smoke-temperature area behind a hearth outlet along a boiler smoke flow path; and a low-temperature superheater heating surface tube panel (11) and a low-temperature reheater heating surface tube panel (8) are sequentially arranged on the downstream of the high-smoke-temperature area in the flowing direction of the smoke. The method is suitable for an ultra-supercritical tower type boiler unit adopting one-time reheat cycle, and the ultra-supercritical tower type boiler unit can be effectively supported to meet the low-load economic operation index requirement of a new generation of coal electricity.

The invention discloses a biomass boiler digital platform building method and system, relates to the technical field of biomass boiler building, and aims to solve the problems of low design efficiency, unreasonable structural design, insufficient boiler design mechanical strength, low combustion efficiency and the like caused by the fact that designers use CAD (Computer Aided Design) cartographic software for manual drawing. According to the technical scheme, the design reasonability of each part is corrected, the corrected parts are assembled, and therefore the problem that in the existing biomass boiler main engine building process, matching is not reasonable, and consequently the combustion efficiency of a biomass boiler main engine is low is solved. The biomass boiler host matched with the technical scheme is high in rationality and high in combustion efficiency.

The present invention belongs to the field of thermal power control and provides a feedforward control system and method for a thermal power unit. The system includes: a data acquisition unit for acquiring the operating parameters and load setting parameters of the thermal power unit; a correction calculation unit for determining the key calorific value of the thermal power unit and the boiler design efficiency based on the operating parameters, and calculating the boiler efficiency correction factor; a state detection unit for generating a load control instruction based on the load setting parameters, judging the operating state of the thermal power unit, and obtaining a state judgment result; a parameter generation unit for determining correction values for various parameters of the thermal power unit; and a feedforward control unit for generating and correcting a feedforward control variable based on the load control instruction, the state judgment result, and the various parameter correction values, and performing feedforward control of the thermal power unit based on the corrected feedforward control variable. The solution provided by the present invention utilizes a multi-parameter comprehensive correction mechanism to improve the control efficiency and control stability of the feedforward control link.