Energy-saving gypsum calcination system and process

Abstract

The invention discloses an energy-saving gypsum calcination system and an energy-saving gypsum calcination process. The energy-saving gypsum calcinations system comprises a paddle dryer, a vibrating screen, a cement bulk truck, a pelletizer and a cement delayed coagulation device, a fluidized bed calcinator, a building gypsum processing device, and an oscillation flow heat pipe. The paddle dryer is used for drying wet gypsum materials; the vibrating screen is used for screening the dried gypsum; the cement bulk truck is used for manufacturing cement; the pelletizer and the cement delayed coagulation device are used for palletizing the dried gypsum which is used as a cement retarder; the fluidized bed calcinatory with a bag-type dust collector is used for calcining the gypsum; the building gypsum processing device is used for processing the calcined gypsum into building gypsum powder; and the oscillation flow heat pipe is used for utilizing residual heat of the moisture-carrying gas and fluidized gas. Due to the adoption of a device for drying and calcining successively, the calcining efficiency and product quality are improved; and the residual heat is fully utilized, so the energy utilization rate of the system is improved. The process system has the advantages of continuous operation, high heat efficiency, low energy consumption, high yield, stable operation, convenient operation, and automatic control.

Description

[0001] technical field [0002] The invention relates to a gypsum calcining system, in particular to an energy-saving gypsum calcining system with primary paddle drying and secondary fluidized bed calcining and its process. [0003] Background technique [0004] Gypsum stone or industrial by-product gypsum exists in the form of calcium sulfate dihydrate. When dihydrate gypsum is heated to a certain temperature, it will easily lose part of its crystal water and become hemihydrate gypsum. This process is called calcination of gypsum. With the rapid development of my country's industry, the output of desulfurization gypsum, phosphogypsum and other industrial by-products of gypsum has also increased rapidly. If these industrial by-products of gypsum are not processed, it will not only waste land resources but also cause environmental pollution. [0005] At present, most of the existing large-scale gypsum products enterprises in China use internal and external fired rotar...

AI Technical Summary

Problems solved by technology

If these industrial by-products of gypsum are not treated, it will not only waste land resources but also cause environmental pollution

[0005] At present, most of the existing large-scale gypsum products enterprises in China use internal and external fired rotary kilns, intermittent or continuous frying pans, fluidized fluidized furnaces, etc., with small scale, unsound supporting facilities, unstable product quality and high energy consumption.

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