What types of waste heat recovery solutions are there?

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There are many solutions for waste heat recovery from exhaust gas, depending on factors such as the temperature, flow rate and water content of the exhaust gas. The following are some common waste heat recovery solutions for exhaust gas:
Hot water boiler: Hot water boiler is a common device that converts the heat in exhaust gas into hot water. Hot water can be used for heating, bathing, steam production, etc.
Air preheater: Air preheater is a device that converts the heat in the exhaust gas into air. The preheated air can be used to dry materials, heat raw materials, etc.
Gas turbine: A gas turbine is a device that converts the heat in exhaust gas into electrical energy. Gas turbines can be used to generate electricity, drive machinery, etc.
Absorption chiller: Absorption chiller is a device that converts the heat in exhaust gas into cold energy. The cold energy can be used for refrigeration, air conditioning, etc.
Waste heat boiler: A waste heat boiler is a device that converts the heat in exhaust gas into steam. The steam can be used to drive machinery, produce hot water, etc.
Waste gas heat recovery can save energy, reduce costs and reduce pollution. Choosing the right waste gas heat recovery solution can bring significant economic and environmental benefits to the company.

废气余热回收的主要形式

常见方案包括转轮式换热器、板翅式、热管与余热锅炉等。转轮式适合气气换热、连续大风量；板翅式结构紧凑；热管便于远距离传热；余热锅炉适合高温烟气产汽。选型需结合温度、风量、介质与回收目标，详见四种热回收方式对比。

选型前参数梳理

无论选哪种余热回收，都需先厘清废气温度、流量、含尘与腐蚀性及回收用途，参数越清晰方案越可靠，也便于后期能效评估与优化。

选型前参数梳理

无论选哪种余热回收，都需先厘清废气温度、流量、含尘与腐蚀性及回收用途，参数越清晰方案越可靠，也便于后期能效评估与优化迭代，减少盲目投资带来的浪费。

明确回收目标后，再比较设备形式，能更快锁定经济可行的方案；建议同时评估回收热量用于预热、产汽或发电的各自收益。

建议在方案阶段就同步做技术经济比选，明确回收热量的最佳用途，避免设备选型与实际工况脱节，确保投资真正产生可计量的节能收益，而不是形式上的配置。