Waste heat power generation equipment and process knowledge mainly covers the technology and process of generating electricity using waste heat (i.e. waste heat) generated in industrial production process. Here are some basic knowledge about waste heat power generation equipment and processes:
Waste heat power generation equipment
Waste heat boiler：
Waste heat boiler is one of the core equipment of waste heat power generation system. It uses the heat in waste gas and waste liquid generated in industrial production process to generate steam or hot water.
According to different heat source characteristics and process requirements, the waste heat boiler can be designed as vertical or horizontal, and the corresponding heat exchange tube bundle (such as spiral fin tube, serpentine light tube, etc.) can be configured to increase the heat exchange area.
Waste heat boilers usually include economizer, evaporator, superheater, steam drum and heat pipe.
Steam turbine or generator set：
Steam turbines use steam produced by waste heat boilers to drive the rotor to rotate, thereby converting thermal energy into mechanical energy.
The generator set converts the mechanical energy output by the steam turbine into electric energy.
Auxiliary equipment：
The waste heat power generation system also includes some auxiliary equipment, such as dust collector, desulfurization device, cooling system, circulation pump, expansion joint, process valve, etc., which are used to pretreat waste heat, improve power generation efficiency and ensure the stable operation of the system.
Waste heat power generation process
Waste heat recovery：
In the process of industrial production, the generated waste heat (such as high-temperature flue gas, waste liquid, etc.) is recovered through pipelines, heat exchangers and other equipment.
Thermal energy conversion：
The recovered waste heat is transferred to the water or other working fluid in the waste heat boiler, causing it to produce steam or hot water.
According to the heat source characteristics and process requirements, different thermal energy conversion methods and equipment can be selected.
power conversion：
Heat energy in steam or hot water is converted into mechanical energy, which in turn is converted into electricity, using a steam turbine or generator set.
Electrical energy output：
Mechanical energy is converted into electrical energy through generators, and electrical energy is supplied through the grid to be used where it is needed.
Emission Treatment：
The exhaust gas and wastewater generated during the waste heat power generation process need to be treated before being discharged to ensure compliance with environmental protection requirements.
Technical characteristics
energy saving: By recycling the waste heat generated in the industrial production process, the energy utilization efficiency is improved and the energy consumption is reduced.
environmental protection: The emission of exhaust gas and wastewater is reduced, and the pollution to the environment is reduced.
Determining electricity by heat: Because waste heat power generation systems rely on waste heat generated during industrial production, the amount of electricity generated is typically matched to the amount of heat provided by the heat source.
Heat source characteristics: The waste heat generated by different industrial production processes has different characteristics such as temperature and pressure, and it is necessary to select suitable waste heat power generation technology and equipment according to specific conditions.
Fields of application
Waste heat power generation technology is widely used in steel, cement, chemical industry, electric power and other industrial fields, as well as urban life, medical waste treatment and other fields. By using the waste heat generated in these fields to generate electricity, the goals of energy recycling and energy saving and emission reduction can be achieved.