Residue discharge and heat recovery method of pyrite acid production and equipment system

Abstract

The invention provides a residue discharge and heat recovery method of pyrite acid production and an equipment system for realizing the method. High-temperature dust-laden gas discharged from a roasting furnace is subjected to heat exchange of a waste heat boiler and dust collection and then is discharged; dust is collected through a cyclone separator and an electric dust collector in sequence; high-temperature ash residue discharged from the roasting furnace and the waste heat boiler is cooled through a first high-temperature material cooler; meanwhile, the high-temperature ash residue discharged from the cyclone separator and the electric dust collector is cooled through a second high-temperature material cooler; the cooled ash residue is conveyed to a destination by a closed conveying device to be reutilized; and meanwhile, cooling water heated by the high-temperature material coolers directly enters a deoxidation and water replenishing system of the waste heat boiler to fulfill the aim of heat recovery. According to the residue discharge and heat recovery method of pyrite acid production and the equipment system, environmental pollution produced by residue discharge treatment in a pyrite acid production process is reduced, and the residue discharge heat recovery and utilization rate can be efficiently increased.

Description

technical field [0001] The invention relates to the treatment and thermal recycling of solid waste in the acid production process of pyrite ore, in particular to the slag discharge and heat recovery process of roasting slag and high-temperature slag of its matching waste heat boiler in the acid production process of pyrite ore. [0002] The present invention also relates to an equipment system for realizing the above slag discharge heat recovery process. Background technique [0003] In the process of pyrite acid production, the pyrite needs to be roasted in a roasting furnace. In order to make full use of the waste heat in the roasting process, save energy and reduce consumption, it is generally necessary to set up a waste heat boiler and a steam turbine to generate electricity to realize the co-production of acid, heat and electricity. . In the pyrite acid production process, due to the large amount of waste slag produced by roasting furnaces and waste heat boilers, the s...

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Problems solved by technology

[0006] The object of the present invention is to provide a kind of high-temperature, fine-grained slag discharge that is used in the roasting furnace and waste heat boiler in the pyrite acid production process, which is a process for dry slagging and heat recovery, so as to solve the problem of pyrite. The environmental pollution caused by slag discharge treatment in the process of mine acid production and the low recovery and utilization rate of slag discharge heat

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