Waste heat recovery design consultation
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Question: The flue gas volume from the coke oven is 150,000 standard cubic meters per hour on a wet basis, with a humidity level of 10%. The requirements are that the inlet temperature of the waste heat recovery unit should be 225°C, the outlet temperature should be 150°C, and the saturated steam pressure should be 0.64 MPa (gauge pressure). The inlet water is softened water at 20°C. Is it possible to achieve this? The temperature of saturated steam at 0.64 MPa (gauge pressure) is approximately 168°C. Can the flue gas be cooled to such a low temperature? Or, if it can be reduced to 150°C, its economic efficiency in terms of design is very poor.
Waste heat recovery can be achieved, but the issue of whether the flue gas temperature can be reduced to 150°C must be considered. If it can be reduced to 150°C, the design may be less economical. The heat exchanger needs to be specially designed and optimized to meet the requirements. .