Advantages of Exhaust Gas Recovery Heat Exchangers

Advantages of Exhaust Gas Recovery Heat Exchangers

Efficient use of energy

Significant reduction of energy consumption: In industrial production, exhaust gases usually contain a large amount of heat energy. Recovering this heat through a gas-to-gas heat exchanger can be used to preheat the gases entering the production process, e.g. in the iron and steel industry the heat from exhaust gases such as blast furnace gas can be used to preheat the combustion air. This reduces the consumption of additional energy (e.g. fuel) and thus reduces production costs. According to statistics, in some energy-intensive industries, such as glass manufacturing, energy consumption can be reduced by 15% - 30% with the use of exhaust gas heat recovery systems.

Improve the comprehensive utilisation of energy: industrial production processes often have multiple links that require heat supply. Exhaust gas heat recovery allows energy to be recycled within the enterprise, reintegrating thermal energy that would otherwise be wasted into the production system, and improving the overall energy utilisation rate of the entire industrial production process. For example, in chemical production, the heat of the exhaust gas after the reaction can be used to preheat the raw gas, so that the energy can be effectively transferred between different parts of the chemical process.

Improved economic efficiency

Fuel cost savings: By reducing the need for external energy sources (e.g., natural gas, coal, etc.), companies can save a significant amount of money on fuel purchases. For large industrial organisations, these savings can be considerable. For example, a large cement plant can save hundreds of thousands of dollars or more per year in fuel costs through an effective exhaust gas heat recovery system.

Extended equipment life: In some cases, the recovered heat can be used to preheat the gases required for equipment start-up, allowing the equipment to be in a milder thermal environment during the start-up phase and reducing the damage caused by thermal stresses on the equipment. This helps to extend the life of the equipment, reducing the frequency of updates and repairs, and further saving your organisation's operating costs.

Environmentally Friendly

Reduced greenhouse gas emissions: When the heat of the exhaust gases is used to preheat the combustion gases, the combustion efficiency is increased, thus reducing the amount of fuel burned. The reduction in the amount of fuel burnt directly leads to a reduction in greenhouse gas emissions such as carbon dioxide. For example, in gas turbine power generation in the power industry, by recovering heat from the exhaust gases to preheat the incoming air, the fuel can be burned more fully, and carbon dioxide emissions can be reduced by about 5-10 per cent, which has a positive effect on mitigating global climate change.

Reducing thermal pollution: Direct emission of industrial exhaust gases leads to localised temperature increase and thermal pollution. By recovering the heat in the exhaust gas, the emission temperature of the exhaust gas can be lowered, reducing the thermal impact on the surrounding environment and helping to maintain the ecological balance.

Process optimisation and quality improvement

Stabilisation of process temperature: In many industrial processes, gas temperature has an important influence on the process. For example, in some chemical reactions, a stable gas temperature is required to ensure the rate and quality of the reaction. The use of exhaust gas heat recovery systems allows precise control of the temperature of the gas entering the reaction process, resulting in a more stable process, which is conducive to improving product quality.

Improve production efficiency: Preheating the gas by recovering heat from the exhaust gas can speed up certain parts of the production process. For example, in the material drying process, the use of preheated drying gas can speed up the drying speed, thus improving the efficiency of the whole production process.