16 results about "Boiler design" patented technology

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 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 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 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 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 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.

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 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.