With the arrival of autumn, the boiler industry has also ushered in new technological developments and policy orientations. This article will provide an overview of the latest boiler knowledge in September from the aspects of technological innovation, policy impact, energy conservation and environmental protection, and safety supervision.

1. Technological innovation and application

In September, technological innovation in the boiler industry continued to develop in depth. The application of intelligent technology has become a hot spot in the boiler industry. By installing sensors, data acquisition equipment and advanced algorithms, the intelligent monitoring system can realize real-time monitoring and analysis of key parameters of boiler operation, and improve the safety and reliability of boilers. The application of non-contact monitoring technologies such as infrared thermal imagers is also becoming increasingly widespread. These technologies not only improve monitoring efficiency, but also reduce the inconvenience caused by boiler shutdown and disassembly.
In addition, automatic control systems have gradually become mainstream. By installing sensors and actuators and equipping them with advanced control algorithms, the level of automatic control of boilers has been greatly improved, reducing the risk of human operating errors. The application of visual recognition technology has also further improved the safety control level of boilers, and can detect and identify boiler water levels, combustion conditions and pipeline connections in real time.

2. Policy influence and orientation

In September, the boiler industry continued to be influenced and promoted by national policies. The "Guiding Opinions on Coordinating Energy Conservation and Carbon Reduction and Recycling and Accelerating the Renovation of Products and Equipment in Key Areas" jointly issued by the National Development and Reform Commission and nine other departments and its accompanying "Guidelines for the Implementation of Boiler Renovation and Recycling (2023 Edition)" have pointed out the direction for the development of the boiler industry. These policies emphasize the need to continuously improve the supply capacity of high-efficiency and energy-saving boilers, orderly implement energy-saving and carbon-reduction transformation of operating boilers, gradually eliminate inefficient and backward boilers, and strengthen the research and development and application of cutting-edge technologies.

At the same time, the State Administration for Market Regulation also issued the "Implementation Opinions on Implementing the Action Plan for Green, Low-Carbon and High-Quality Development of Boilers", which proposed a number of specific measures, including eliminating old and inefficient boilers, promoting boiler technology innovation, supporting boiler renovation, and implementing use management responsibilities. The implementation of these policies will significantly improve the operating efficiency of boilers and promote the green and low-carbon development of the boiler industry.

3. Energy Conservation, Environmental Protection and Green Development

Against the backdrop of global carbon neutrality, energy conservation, environmental protection and green development in the boiler industry are particularly important. Traditional fossil fuels such as coal and oil are gradually being replaced by clean energy such as natural gas, biomass and solar energy. Biomass boilers and solar boilers will occupy an important position in the future market with their renewability and environmental protection.

In addition, improving the energy efficiency of boilers is also an important direction for energy conservation and environmental protection. By strengthening combustion, reasonably distributing air, and ensuring the quality of coal, the incomplete combustion heat loss and smoke exhaust loss of the boiler can be significantly reduced, and the thermal efficiency of the boiler can be improved. At the same time, the use of advanced energy-saving technologies and equipment, such as waste heat recovery systems and high-efficiency heat exchangers, can also further reduce the energy consumption of the boiler.

4. Safety supervision and operation and maintenance management

In September, new progress has been made in the safety supervision and operation and maintenance management of boilers. With the development of intelligent technology, the safety monitoring and early warning system of boilers has been increasingly improved. By real-time monitoring of the operating parameters and status of the boiler, potential safety hazards can be discovered and warned in time to ensure the safe operation of the boiler.
In terms of operation and maintenance management, key links such as boiler startup, boosting, paralleling, fire suppression, fire raising, and switching equipment need to be strictly and carefully inspected and prepared. At the same time, strengthening the sense of responsibility and professional training of operators and improving their ability to grasp the operating parameters and status in real time are also important measures to ensure the safe and efficient operation of boilers.

In addition, regular maintenance and upkeep of the boiler is also essential. By regularly checking and replacing wear parts, cleaning up ash and slag, the boiler can be kept in good operating condition and its service life can be extended.

Conclusion

In September, the boiler industry has made new progress in technological innovation, policy guidance, energy conservation and environmental protection, and safety supervision. In the future, with the continuous development of science and technology and the continuous promotion of policies, the boiler industry will develop in a more intelligent, green and efficient direction.

1. Circulation rate of circulating fluidized bed boiler

Definition: The circulation rate refers to the ratio of the amount of material (mainly ash particles) entering the CFB boiler to the amount of fuel required for combustion in the furnace. It reflects the number and degree of circulation of the material in the furnace.

Influencing factors:

Separator efficiency: The higher the separator efficiency, the more ash particles are recovered and the higher the circulation rate.
Fuel particle size: Small particle size, more fly ash, large circulation rate.
Fuel ash content: High ash content, more ash particles produced, large circulation rate.
Boiler load: Load reduction, flue gas flow rate reduction, circulation rate reduction.

2. Reasons for closing the economizer recirculation door of drum boiler

Closing the recirculation door is to prevent cracks caused by uneven boiler water temperature and uneven heating of the recirculation pipe metal, while ensuring the normal operation of the economizer.

3. Chemical cleaning of new and overhauled boilers

Chemical cleaning is to remove impurities such as grease, iron filings, welding slag, etc. generated during manufacturing, transportation, installation and maintenance to prevent these impurities from damaging the boiler and turbine.
 

4. Boiler blowpipe

Blowpipe is to use the steam generated by the boiler itself to physically clean the steam-water system and remove the residues in the equipment and pipelines that cannot be cleaned by chemical cleaning.

5. Time and temperature regulations for water filling before boiler start-up

The time and temperature for water filling are stipulated to prevent the expansion difference between the drum and the connecting pipe due to uneven heating, causing damage to the equipment.

6. Common maintenance methods for boilers

Wet protection: prevent corrosion by adding chemical agents.
Dry protection: keep dry by drying or placing desiccant.

7. Reasons for deterioration of steam quality

Steam carries water: impurities in boiler water are carried by steam.
Steam dissolves salt: steam dissolves part of the salt under high pressure.

8. Low-temperature corrosion of the tail heating surface

  Since the sulfur in the fuel burns to generate SO3, it combines with the water vapor in the flue gas to generate sulfuric acid vapor, which condenses on the low-temperature heating surface and causes corrosion.

9. Emergency shutdown situations

Including many serious situations such as drum water level exceeding the limit, damage to all water level gauges, pipeline explosion, tail re-combustion, fan shutdown, etc.

10. Reasons for monitoring exhaust gas temperature

Exhaust gas temperature is the main part of boiler heat loss and can reflect the operating status of the boiler, so it needs to be monitored.

11. Pressure increase, pressure relief speed and qualified standards for water pressure test

The speed and qualified standards for pressure increase and pressure relief are specified to ensure the safety of the test process and accurately evaluate the sealing of pressure-bearing parts.

12. Flushing steps for drum water level gauge

The accuracy and cleanliness of the water level gauge are ensured through three steps: water side flushing, steam side flushing and steam-water co-flushing.

13. Reasons for not using water spray cooling for reheat steam temperature regulation

Water spray cooling will reduce the thermal efficiency of the unit and limit the working capacity of the high-pressure cylinder.

14. Steps for reheater water pressure test

The preparation, pressure increase, inspection and pressure reduction process of the reheater water pressure test are described in detail.

15. Main factors affecting wear rate

  Including the flow rate, concentration, particle size, hardness of flue gas materials and the surface shape and hardness of the worn components.

16. Reasons for controlling the bed temperature between 850-950℃

This temperature range can avoid ash melting, improve desulfurization efficiency, reduce nitride generation and alkali metal sublimation.

17. Phenomenon of coking on the bed surface of circulating fluidized bed boiler

Including a sharp increase in bed temperature, a decrease in oxygen content, changes in fan current and other manifestations.

18. Measures to avoid coking during startup

  Including checking the hood opening, controlling the heating rate, ensuring uniform bed temperature, and slowly feeding coal.

19. Factors affecting the load of fluidized bed boilers

Including coal quality, bed temperature, bed pressure, oxygen content and air ratio, feed water temperature and cleanliness of the tail heating surface.

20. Methods for protecting castings during startup

Control temperature changes, furnace pressure changes and coal feeding to ensure the safety of castings.

Through these detailed explanations and supplements, you can have a more comprehensive understanding of the operation, maintenance and care of circulating fluidized bed boilers and drum boilers.

With the enthusiasm of summer in August, the field of boiler technology has also ushered in a new craze. The emergence of a series of innovative technologies and green solutions is leading the future development of the industry. During this month, boiler technology not only made significant breakthroughs in improving energy efficiency, but also took solid steps in environmental protection and intelligence.

Ultra-efficient boiler technology leads the way

In August, several boiler manufacturers announced the latest developments in ultra-efficient boiler technology. These new boilers achieve higher thermal efficiency by optimizing the combustion process, improving heat transfer efficiency and using advanced control systems. In particular, the steam parameters of some boilers using ultra-supercritical technology have been further improved, bringing the power generation efficiency to unprecedented heights and bringing cleaner and more efficient energy solutions to the power industry.

The popularity of clean energy boilers is accelerating

As the global demand for clean energy continues to grow, August has become a critical period for the accelerated popularity of clean energy boilers. Natural gas boilers continue to become the mainstream of the market due to their low emissions and high efficiency. At the same time, renewable energy utilization technologies such as biomass boilers have also made significant progress. More and more companies have begun to explore the conversion of agricultural waste, forestry waste and other biomass resources into boiler fuel, realizing resource recycling and Environmental sustainability.

Intelligent boiler technology ushered in new breakthroughs

In the field of intelligence, boiler technology has also ushered in new breakthroughs. In August, a number of companies launched intelligent boiler control systems that integrate advanced technologies such as artificial intelligence and big data. These systems can monitor the operating status of the boiler in real time, accurately control the combustion process, and automatically adjust combustion parameters according to load changes, thereby optimizing the boiler operation. In addition, smart boilers also have functions such as fault diagnosis and remote monitoring, which greatly improve the reliability and maintenance efficiency of the boiler.

Continuous innovation in environmental protection technology

  In terms of environmental protection, boiler technology continues to innovate. In August, some new environmentally friendly technologies such as low-temperature plasma technology and carbon capture and storage technology received attention in the boiler field. These technologies are expected to bring revolutionary improvements to the environmental performance of boilers in the future. At the same time, some companies have also developed more efficient denitrification, desulfurization and dust removal technologies, allowing boilers to achieve more significant results in reducing pollutant emissions.

Conclusion

August is an important period for boiler technology innovation and green development. During this month, we not only saw the trend of ultra-efficient boiler technology, the accelerated popularization of clean energy boilers, and new breakthroughs in intelligent boiler technology, but also witnessed the continuous innovation of environmental protection technology. The emergence and application of these new technologies not only promote the rapid development of the boiler industry, but also make important contributions to the progress of global energy and environmental protection. We have reason to believe that boiler technology will usher in more brilliant development prospects in the days to come.

With the rapid development of science and technology and the increasing global requirements for energy efficiency and environmental protection, boiler technology is also constantly innovating and evolving. Below, we will discuss several recent knowledge and technological advances in the field of boilers.
1. Ultra-supercritical boiler technology

Ultra-supercritical boiler technology is one of the hot spots in the current thermal power generation field. This type of boiler further improves the critical state of water by increasing the pressure and temperature of steam, thus greatly improving power generation efficiency. Compared with traditional boilers, ultra-supercritical boilers can utilize fuel energy more efficiently, reduce energy losses, and emit significantly less pollutants. This technology is of great significance for improving the energy efficiency and environmental protection level of the power industry.

2. Wide application of clean energy boilers

As the global demand for clean energy increases, boilers fueled by natural gas, biomass energy, etc. have been widely used. These clean energy boilers not only reduce dependence on fossil fuels, but also significantly reduce emissions of pollutants such as carbon dioxide and sulfide. Especially biomass boilers use biomass resources such as crop straw and forest waste as fuel to achieve resource recycling and environmental sustainable development.

3. The rise of intelligent boiler control systems

Intelligent technology is increasingly used in the boiler field. By integrating advanced technologies such as sensors, controllers, and big data analysis, the boiler control system can achieve real-time monitoring, precise control, and intelligent optimization of boiler operating status. This not only improves the operating efficiency and stability of the boiler, but also reduces operating costs and maintenance difficulty. The rise of intelligent boiler control systems marks that the boiler industry is gradually developing towards intelligence and automation.

4. Modular and integrated design trends

In order to improve the production efficiency of boilers, reduce manufacturing costs and facilitate transportation and installation, modular and integrated design have become important trends in the boiler industry. By decomposing the boiler into multiple independent modules for production and assembly, the production cycle can be greatly shortened and product quality improved. At the same time, the integrated design also reduces the complexity and floor space of the boiler system, providing users with a more convenient and efficient experience. 5. Continuous innovation of environmental protection technology

In terms of environmental protection, boiler technology is also constantly innovating and upgrading. For example, the use of advanced denitrification, desulfurization and dust removal technologies can effectively reduce pollutants such as nitrogen oxides, sulfur dioxide and particulate matter emitted by boilers. In addition, there are some new environmental protection technologies being developed, such as carbon capture and storage technology, low-temperature plasma technology, etc. These technologies are expected to make greater contributions to the environmental protection of the boiler industry in the future.

To sum up, the latest progress in boiler technology covers ultra-supercritical boiler technology, the wide application of clean energy boilers, the rise of intelligent boiler control systems, modular and integrated design trends, and the continuous innovation of environmental protection technology. . The emergence and application of these new technologies not only promote the rapid development of the boiler industry, but also make important contributions to the progress of global energy and environmental protection.

Boilers are indispensable and important equipment in industrial production and daily life. Its operating principles and related knowledge are crucial to ensure its safe and efficient operation. Below you will be given a complete analysis of basic boiler knowledge.

1. Definition and classification of boilers

A boiler is an energy conversion device that primarily uses thermal energy or other thermal energy released by the combustion of fuel to heat water and convert it into hot water or steam. Boilers can be divided into many types according to different classification standards. For example, boilers can be divided into power plant boilers, industrial boilers, marine boilers, locomotive boilers, etc. according to its uses; boilers can be divided into low pressure, medium pressure, high pressure and ultra-high pressure; , subcritical pressure boilers, supercritical pressure boilers according to the output steam pressure, boilers can be divided according to fuel Divided into coal boilers, oil boilers, gas boilers, waste heat boilers, electric boilers, gas boilers biomass, etc.

2. Principle of operation of the boiler.

The working principle of the boiler mainly includes three processes: combustion, heat transfer and steam-water circulation. The fuel burns in the combustion chamber of the boiler and releases a large amount of thermal energy; This thermal energy is transferred to the water through the heating surface of the boiler, heating the water into hot water or circulating steam; into the boiler's steam-water system to complete the energy conversion process.

3. Main components of the boiler.

The main components of the boiler include the furnace, drum, water wall, superheater, economizer, air preheater, frame and furnace wall. The furnace is the place where the fuel is burned, the drum is a container for storing hot water or steam, the water wall is a radiant heating surface arranged around the furnace and the superheater, economizer and air preheater are the boiler heat exchange equipment. To improve the thermal efficiency of the boiler.

4. Operation and maintenance of the boiler.

Boiler operation and maintenance are key to ensuring its safe and efficient operation. During operation, key indicators such as combustion parameters, water level and steam pressure must be strictly controlled to ensure the stable operation of the boiler. At the same time, the boiler should be periodically inspected, repaired and maintained, and various faults and hidden dangers should be discovered and solved in a timely manner to ensure the reliability and service life of the boiler.

5. Boiler safety and environmental protection.

Boiler safety and environmental protection issues have always attracted much attention. During operation, relevant safety regulations and operating procedures must be strictly observed to ensure the safe operation of the boiler. At the same time, effective environmental protection measures, such as the use of low-sulfur fuels and the installation of dust removal and desulfurization equipment, are taken to reduce polluting emissions from boilers and protect the environment.

In summary, as an important energy conversion equipment in industrial production and daily life, the knowledge of boilers involves many aspects. Understanding the basics of a boiler, how it works, its main components and how to operate and maintain it is crucial to ensuring its safe and efficient operation. At the same time, paying attention to the safety and environmental protection of boilers are also aspects that we should pay special attention to when using boilers.

Basic Principles

1. Atmospheric pressure hot water boiler

Atmospheric pressure hot water boiler is also called non-pressure hot water boiler. The drum is filled with water and heated by direct combustion in the furnace to form hot water. It belongs to the category of civil domestic boilers. The atmospheric pressure hot water boiler is a non-pressure hot water boiler with an air vent on the top and the boiler body is always in a normal pressure operation state. Its main feature is that the boiler is not under pressure and has no potential safety hazards. , mainly used for heating and production of hot water, is one of our more common boiler varieties.

Advantages: simple to manufacture and easy to install; the boiler is directly vented to the atmosphere, which is safer than the pressure boiler;

Disadvantages: The boiler system cannot directly supply heat because it cannot bear pressure. It needs to be equipped with accessories such as external heat exchangers. The cost of the system is high; the startup is slow and the preheating time is long; after the boiler is scaled, the thermal efficiency decreases year by year, and the service life generally does not exceed 8-10 year;

2. Vacuum hot water boiler

The vacuum boiler forms a negative pressure vacuum environment inside the closed furnace body, and fills the heat medium water in the body. The heat medium water is heated by combustion or other methods, and the heat medium water is heated to generate steam, and the steam heats the water in the heat exchanger tubes through condensation heat exchange to realize the supply of hot water.

Advantages: high thermal efficiency, the boiler will never scale, and achieve semi-permanent life (more than 20 years); fast start-up, small preheating loss; multi-channel water supply, multi-purpose for one machine; negative pressure operation, safer.

Disadvantages: high manufacturing requirements; hot water outlet temperature up to 90 ℃.

Comparison of heating systems

1. The hot water supply system of the atmospheric hot water boiler is adopted:

According to the current national standards and specifications, the atmospheric pressure hot water boiler is not allowed to bear pressure when it is in operation. In order to meet the usage requirements when the heating system is running, it can only be made up by configuring other auxiliary equipment in the system to make it perfect. System Features:

a. The system is complex, with many equipment and control systems, which are prone to failures and cumbersome operations (requires full-time personnel);

b. There are many auxiliary equipment, high installation requirements, large floor space, and increased initial investment;

c. The number of intermediate heat exchanges is large, the heat loss of the system is large, the operating cost is high, and the thermal efficiency of the system is low (about 80%);

d. The maintenance cost is high, and the service life of the boiler equipment is short (about 8 years);

e. The water temperature of the hot water tank cannot be controlled, the water temperature is not constant, and the water temperature of the hot water supply system fluctuates greatly.

2. The hot water supply system of vacuum hot water unit is adopted:

According to the structural characteristics of the vacuum hot water unit, the state expressly stipulates that it is not a special equipment, can withstand pressure (standard pressure 1.0Mpa) during operation, and can be directly connected to the system for use. System Features:

a. The system is simple and reliable, and the operation is convenient (unmanned operation is possible);

b. Less equipment configuration, low installation requirements, small footprint, and low initial investment;

c. The intermediate heat exchange loss is almost zero, the operating cost is low, and the thermal efficiency of the system is high (over 90%);

d. Maintenance is simple, the cost is low, and the service life of the unit equipment is long (up to 20 years);

e. Automatic constant temperature water supply, high quality hot water.