Resource recycling method of waste ammonium alkali liquid for well injection and brine extraction of sodium sulfate type salt mine

Abstract

The invention discloses a resource recycling method of waste ammonium alkali liquid for well injection and brine extraction of a sodium sulfate type salt mine, which comprises the following steps: injecting waste ammonium alkali liquid under the salt mine instead of fresh water directly or after being added with fresh water, dissolving rock salt to from mine brine, and extracting the mine brine after natural sedimentation. In the invention, the waste ammonium alkali liquid is used for the sodium sulfate type salt mine, the waste ammonium alkali liquid is injected under the salt mine for brine extraction directly or after being added with water to obtain high-quality brine with low sodium sulfate content, thereby not only the sodium sulfate content in the brine is reduced, but also NaCl in the waste ammonium alkali liquid is recycled, the resource recycling of the waste ammonium alkali is achieved, and the emission of wastes is reduced. The prepared brine can be used in vacuum salt manufacturing, brine alkali manufacturing, mine brine air-cured salt manufacturing and other chemical industries.

Description

technical field [0001] The invention belongs to the technical field of energy saving and emission reduction in the soda making industry and brine refining in mine salt production, and relates to a resource utilization method of ammonia-alkali waste liquid, in particular to an ammonia-alkali waste liquid used in injection wells of sodium sulfate type salt mines Resource utilization method of brine mining. Background technique [0002] The soda ash industry is one of the basic sectors of the chemical industry, known as the mother of industry, and occupies a very important position in the national economy. Soda ash production processes mainly include ammonia-soda process, combined soda process and trona production process. From a global perspective, the most widely used and large-scale chemical synthesis soda production process is the ammonia-soda process. The ammonia-soda method was pioneered by the Belgian Solvay, also known as the Solvay soda-making method. It has a history...

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Problems solved by technology

[0011] The object of the present invention is to provide a resource utilization method for ammonia-alkali waste liquid used in injection wells of sodium sulfate type salt mines to extract brine, which can not only solve the problem of comprehensive treatment and utilization of ammonia-alkali waste liquid in the ammonia-soda method soda ash production process, Fully recycle and utilize NaCl in ammonia-alkali waste liquid to reduce waste discharge; and can reduce sodium sulfate content in sodium sulfate-type salt mining brine, improve brine quality, and organically combine ammonia-alkali alkali production with sodium sulfate-type mine salt production Together, realize the joint production of saline-alkali cycle and the resource utilization of ammonia-alkali waste liquid

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