Energy-saving treatment system for preparing gypsum cementing material from industrial byproduct gypsum

Abstract

The invention discloses an energy-saving treatment system for preparing a gypsum cementing material from industrial by-product gypsum, wherein the energy-saving treatment system comprises a raw material system, a drying and calcining system, a heat supply system, a modification system, a purification system, an energy-saving conveying system and a waste heat utilization system; the raw material system is used for providing the industrial byproduct gypsum and conveying the industrial byproduct gypsum to a treatment production line; the drying and calcining system comprises a three-shaft pre-drying machine and a multi-box type calcining furnace, wherein the three-shaft pre-drying machine is used for secondary utilization of heat; the heat supply system is used for providing a heat source for the multi-box type calcining furnace and the three-shaft pre-drying machine and conveying waste heat in the multi-box type calcining furnace to the three-shaft pre-drying machine; the modification system comprises a modification mill and a multi-bin homogenization silo; the purification system is used for recycling dust and moisture in the drying and calcining processes; the energy-saving conveying system comprises a preheating feeding conveying mechanism and a cooling discharging conveying mechanism; and the waste heat utilization system comprises a building block curing kiln for utilizing waste heat of the three-axis pre-drying machine. According to the energy-saving treatment system, raw materials can be uniformly heated, a building gypsum product prepared through calcination is single in phase structure and stable in quality, meanwhile, heat is fully utilized, the waste heat utilization efficiency is high, and cost is saved.

Description

technical field

[0001] The invention relates to the utilization field of industrial by-product gypsum, in particular to an energy-saving treatment system for preparing gypsum gelling materials from industrial by-product gypsum. Background technique

[0002] Industrial by-product gypsum refers to industrial by-products produced by chemical reactions in industrial production, with calcium sulfate (mainly anhydrous and dihydrate calcium sulfate) as the main component. For example, phosphogypsum produced in the production process of phosphorus chemical fertilizers, compound fertilizers and various additives, desulfurized gypsum produced by lime wet desulfurization in large-scale coal-fired facilities, and citric acid gypsum produced in the process of fermentation of citric acid. Fluorogypsum produced in the process of sulfuric acid decomposition of fluorite to prepare hydrogen fluoride, and salt gypsum produced in other chemical production. A large amount of industrial by-produ...

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