Pyrite in the combustion process produces a large amount of waste heat, there is a great value, especially in the conversion and cleaning section, mainly is the medium temperature waste heat (400 ℃) and low temperature waste heat (200 ℃), the use of this part of the waste heat, can produce more steam. Through the conversion of waste heat exchanger removed and not be recycled; Cleaning section of waste heat by dilute acid,dilute acid washing plate heat exchanger to heat, heat is not only no use, also waste a...