Method for preparing sulfuric acid by roasting power plant desuifurized cinder with fluidized bed roaster

Abstract

The invention discloses a process for calcining and preparing sulphuric acid by a fluidized bed furnace for desulfurizing waste residue of power plants. The process takes desulfurized waste residue of the power plants, sulfur and discarded coke dust as raw materials and employs the fluidized bed calcining furnace to initially prepare sulfur dioxide, wherein the obtained sulfur dioxide has the concentration of 8-13%, and then the obtained sulfur dioxide is taken as the raw material to prepare the sulphuric acid by employing the prior art, wherein the obtained sulphuric acid has the concentration of 93-98%. The process not only resolves the problem of after-treatment of the wastes and enables the wastes to be recycled, but also saves pyrite resources poor at home, and the generated economical benefits are quite considerable. And a calcium oxide waste residue is also generated in the process of production, which can be taken as desulfurizer of the power plants to be recycled after cooling treatment. Therefore, the process employed by the invention to prepare the sulphuric acid not only reduces cost for producing the sulphuric acid, but also reduces cost of thermal power plants.

Description

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AI Technical Summary

Benefits of technology

This patented method involves utilizing different types of solid wastes (such as calcined clay) or liquid sludge generated through combustion processes such as coal burning boilers that contain harmful substances like mercury emissions). By grinding these solids into fine particles before they reacts chemically, there will no longer have any problems associated with their handling due to high levels of contaminants released when used without being thrown away after usage. Additionally, this new technology produces valuable products including gypsum, an important ingredient in building construction materials, while producing useful quantities of energy called synthetic fuel oil.

Problems solved by technology

This patented technical problem addressed in this patents relates to finding ways to recycle industrial processes such as burning coal into useful products while reducing harmful emissions caused through combustion process exhaust gases containing nitrogen oxides (NO) during their manufacture. Current methods involve disposal of these unwanted waste solids without making them suitable for reuse due to concerns over potential negative impact on human health issues associated therewith.