Automatic control high temperature waste heat recovery system used in process of preparing acid by sulphur
A waste heat recovery system and a technology for sulfuric acid production, which are applied in the fields of chemical industry, energy saving, and environmental protection, can solve the problems of boiler equipment design without a matching automatic control system, the safety of waste heat boiler system not being guaranteed, and the inability to meet the large-scale sulfuric acid production process. To achieve the effect of long equipment life cycle, high reliability and reliability assurance
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[0017] The present invention will be further described below in conjunction with accompanying drawing.
[0018] see figure 1 , In the acid plant with sulfur as raw material, there is a large amount of high and medium temperature waste heat and low temperature waste heat that can be recovered. This system discusses the recovery system that releases high- and medium-temperature potential heat from sulfur burning and conversion processes.
[0019] The fire tube boiler is installed at the outlet of the sulfur incinerator to recover the high-temperature waste heat generated by the incineration of liquid sulfur in the sulfur incinerator to cool the furnace gas from 1100°C to about 420°C. The heat of the furnace gas is absorbed by the boiler water to generate saturated steam.
[0020] The low-temperature superheater 4A is installed at the outlet of the fourth stage of the converter to recover the medium-temperature waste heat generated during the conversion of sulfur dioxide into su...
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