Production technical method of building gypsum with gradient utilization of thermal energy in condensation and dust removal

Abstract

The invention discloses a production technical method of building gypsum with gradient utilization of thermal energy in condensation and dust removal. A device in the production technical method includes a raw material conveyor, a mechanically fluidized drying and calcining device, a thermal-conductive oil heat exchanger, a thermal-conductive oil pump, a pipeline, a gas exhaust pipeline and a dust remover. Industrial waste heat heats thermal-conductive oil through the thermal-conductive oil heat exchanger. High-temperature thermal-conductive oil is circularly fed into the mechanically fluidized drying and calcining device for providing heat energy for production of the building gypsum. A raw material of gypsum powder is fed into the mechanically fluidized drying and calcining device from the raw material conveyor. In the mechanically fluidized drying and calcining device, a mechanically stirring method is employed for promoting the gypsum to flow and a drying and calcining production process is completed. Water vapor, which is generated during the production process and is mixed with a large amount of dust, is fed into the dust remover through the gas exhaust pipeline and is subjected to a dust removing process in the dust remover in a manner of condensing the water vapor. By means of the technical scheme, clean and energy-saving production with zero discharging and gradient utilization of thermal energy can be achieved and origin process of a by-product of industrial gypsum can be achieved conveniently.

Description

technical field [0001] The invention relates to a production process for building gypsum, in particular to a production process for building gypsum in which heat energy is condensed and dedusted in stages. Background technique [0002] Gypsum has a wide range of uses, and gypsum building materials are the largest application areas of gypsum. The raw material for the production of gypsum building materials is building gypsum powder, which is produced by heating and dehydrating natural gypsum, or industrial by-products such as sulfur gypsum and phosphogypsum. [0003] But the problem that bothers people is that in order to produce building gypsum, on the one hand, natural gypsum is mined in large quantities, and on the other hand, many industrial enterprises produce a large amount of industrial gypsum by-products. Although these industrial gypsum by-products are better than most natural gypsum in quality, they are Still a lot of waste. There are also industrial gypsum by-pro...

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Problems solved by technology

[0004] The reason for this situation is that there is no construction gypsum production equipment suitable for these enterprises: one reason is that the heat used for the production of existing equipment is mostly provided by fuel, and the low-cost industrial waste heat of these enterprises cannot be used; the other is The reason is that the production of construction gypsum from industrial gypsum by-products containing free water usually adopts a two-step production process of pre-drying first and then removing crystal water. It is difficult to realize the processing of building gypsum in the origin

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