Production method for co-production of mirabilite and salt and production device thereof

Abstract

The invention belongs to the technical field of preparing mirabilite, and in particular relates to a production method for the co-production of mirabilite and salt and a production device thereof. The production method comprises the following steps: heating mirabilite preparing solution and separating the mirabilite out of the mirabilite preparing solution; adding salt, namely sodium chloride into high-temperature mirabilite preparing solution to separate the mirabilite out of the solution; and simultaneously, changing the proportions of the mirabilite and the salt in the solution, then using a process principle of 'nitrate co-production' to separate out the salt at a low temperature so as to achieve the separation and the co-production of the mirabilite and the salt, and reclaiming the mother solution containing the salt to the mirabilite preparing solution for recycling. The method and the device can effectively solve the problems of environmental pollution and resource waste caused by the discharge of the mirabilite preparing mother solution by manufacturing enterprises of anhydrous sodium sulfate, improve the utilization rate of mineral resources, save the energy resources, reduce the emissions, protect the environment, and ensure the sustainable development of the anhydrous sodium sulfate industry.

Description

technical field [0001] The invention belongs to the technical field of Glauber's salt preparation, and relates to a method for co-production of salt and salt and a production device thereof. Background technique [0002] As a mineral resource-based production industry, my country's sodium sulfate ore (glauberite ore) is mainly divided into two types: one is glauberite ore, and the saltwater after solution mining contains high calcium sulfate and relatively high calcium sulfate in addition to sodium sulfate. Low sodium chloride; the other is sodium chloride-type associated ore, in addition to sodium sulfate, the nitric water after solution mining also contains high sodium chloride and low calcium sulfate. At this stage, nearly half of the production enterprises of sodium sulfate (sodium sulfate, commonly known as anhydrous Glauber's salt) production industry in China have a certain amount of nitrate in their raw material nitrate because of their resource characteristics are so...

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is to provide a kind of nitrate-salt co-production production method and its method aiming at the technical problem that a large amount of effluent waste liquid (salt-containing mother liquor) cannot be recycled and pollutes the environment in the prior art nitrate production process. The production device realizes "recovery of mother liquor, co-production of nitrate and salt", and completely solves the problems of mother liquor discharge, resource waste, and environmental pollution in Yuanming powder production enterprises

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