Brief Analysis of Waste Heat Boiler Industry Market

A waste heat boiler is a boiler that utilizes the sensible heat in the waste gas, waste or waste liquid in various industrial processes or (and) the heat generated by the combustion of its combustible substances. Or in a gas-fired combined cycle unit, a boiler that utilizes the heat of the high-temperature flue gas discharged from the gas turbine.

According to different uses, industrial waste heat boilers can be subdivided into power station waste heat boilers (ie gas turbine waste heat boilers) and other industrial waste heat boilers. In terms of their environment, other industrial waste heat boilers operate in harsh environments, with complicated design and manufacturing processes, and most of them are non-standard products.

Characteristics of waste heat boiler industry

Waste heat boilers are generally composed of steam drums, evaporators, superheaters, economizers, smoke boxes and flues. Compared with conventional boilers, there is usually no combustion chamber. The waste heat boiler has the characteristics of wide flue gas adaptability, compact boiler system structure, reliable operation, stable operation and long service life.

The biggest difference between waste heat boilers and conventional boilers is the heat source for heating. The heat source of the waste heat boiler can be high temperature flue gas waste heat, chemical reaction waste heat, combustible waste gas waste heat, or even high temperature product waste heat.

On the one hand, the waste heat boiler can use the waste gas and waste energy in industrial production to generate steam for power generation and heating, and at the same time, it can also settle environmental pollutants such as dust in the waste gas to reduce the emission of solid, liquid or gaseous harmful substances.

Waste heat boiler is a typical energy saving and emission reduction equipment. At present, due to technical and capital investment and other reasons, not only a large amount of medium and low temperature waste heat is not used in my country's industrial production, but also a large amount of medium and high temperature waste heat in many production links has not been fully utilized, resulting in environmental pollution and energy. of waste.

Market Application of Waste Heat Boiler

my country's industrial energy consumption accounts for about 70%. Industrial enterprises are major energy consumers in China (such as steel, metallurgy, building materials and other industries), and their energy consumption accounts for about 70% of the country's total energy consumption. The average unit energy consumption of major industrial products is about 30% higher than the international advanced level. In addition to the relatively backward production technology and unreasonable industrial structure, the low utilization rate of industrial waste heat and insufficient comprehensive utilization of energy are important reasons for the high energy consumption. my country's energy utilization rate is only about 33%, which is 10% lower than that of developed countries. %, at least 50% of industrial energy consumption is directly discarded as waste heat in various forms.
For traditional industries with high energy consumption and high emission, "carbon neutrality" is equivalent to "supply side reform 2.0". The supply-side reform started in 2016 has caused many traditional industries to eliminate old and redundant production capacity. "Carbon neutrality" not only needs to control carbon emissions, but also requires enterprises to achieve a balance between import and export through total control, resulting in the final "zero emission". result.

To achieve this result, there is not only one channel of capacity reduction, but also through multiple methods such as process improvement and carbon dioxide recovery. Therefore, for many traditional industries with high energy consumption and high emission, such as electricity, steel, coal, chemical industry, construction, transportation, etc., "carbon neutrality" is equivalent to an upgraded version of supply-side reform.

Industrial energy-saving industry chain: spanning the secondary and tertiary industries, including a complete industrial chain from materials and technology to equipment and products, to operation and maintenance. Among them, the upstream is energy-saving materials and technologies, such as energy-saving materials such as thermal insulation materials and refractory materials, and energy-saving technologies such as energy-saving transformation technologies in key industries; the midstream includes the manufacture of energy-saving equipment (products) including industrial boilers and compressors; Refers to the energy-saving service industry.

Waste heat recovery: Waste heat resources refer to the energy that may be recycled but not yet recycled under existing conditions, and is considered to be the fifth largest conventional energy source after coal, oil, natural gas and hydropower. According to its source, it can be divided into six categories including high-temperature flue gas waste heat (the highest proportion, reaching 50%). These waste heat resources can be used for power generation, driving machinery, heating or cooling, etc., thus reducing the consumption of primary energy and reducing thermal pollution to the environment.


Ways to use waste heat:


heat exchange. It is the most direct and efficient method to recover industrial waste heat. This method does not change the form of waste heat energy, and only transfers waste heat energy directly to the energy-consuming process of its own process through heat exchange equipment, thereby reducing primary energy consumption. The main utilization methods include partition heat exchange, waste heat boiler, regenerative heat exchange, heat exchange of heat pipes, etc.;


heat power conversion. The use of thermal power conversion can improve the grade of waste heat. The waste heat boiler is mainly used for power generation, which is the main form of industrial waste heat utilization.


The heat pump (bromine cooler) system recovers the waste heat.

The utilization efficiency of waste heat resources is related to temperature. Generally, the higher the temperature, the higher the utilization efficiency. According to the temperature of waste heat resources, it can be divided into high temperature waste heat (above 500°C), medium temperature waste heat (200~500°C) and low temperature waste heat (below 200°C). Waste heat boilers are generally suitable for high temperature waste heat, while heat pump systems are suitable for low temperature waste heat.

In the next ten years, the market space for gas turbine waste heat boilers is expected to exceed 50 billion yuan. In the natural gas centralized power generation projects and regional distributed energy projects, the gas turbine waste heat boiler is the key energy recovery device and is indispensable. Under the guidance of the 3060 carbon emission reduction target, the rapid development of gas power will definitely drive related equipment. Consumer demand.