Utilization of process waste heat

For high-temperature liquid media and flue gases in the hazardous chemicals industry, heat can be utilized in the following ways: 1. **Heat utilization of liquid media**: - **Heat exchangers**: This is the most common method, whereby the heat from the high-temperature liquid media is transferred to the medium that needs to be heated. For example, in some processes that require heat treatment, this method can be used to utilize the heat from high-temperature liquids to heat other media. - **Heat accumulator**: If the heat from the liquid medium does not need to be used immediately, a heat accumulator can be employed to store it for use when needed. This method is suitable for situations where thermal demand fluctuates significantly. 2. **Flue gas heat utilization**: - **Waste heat power generation**: If the temperature of the flue gas is high enough, waste heat power generation can be considered as a method for utilizing this heat. Waste heat power generation is a technology that converts the waste heat contained in industrial waste such as exhaust gas, wastewater, and waste residues into electrical energy, typically using devices such as steam turbines or thermocouples. - **Heat recovery system**: If the flue gas contains a large amount of combustible components, a heat recovery system can be considered to recover heat. Such systems typically include heat exchangers and burners, which can recover the heat from flue gases and convert it into usable thermal energy for heating or steam generation, among other purposes. In practical applications, the specific method of heat utilization should be chosen based on the actual circumstances; factors such as the amount of heat, the properties of the medium, and the available equipment all need to be taken into account. At the same time, to ensure operational safety, a thorough risk assessment of hazardous chemicals and high-temperature media must be conducted. .