Original halogen denitration production process and production equipment

Abstract

The invention relates to an original halogen denitration production process and original halogen denitration production equipment. The process comprises the following steps of: 1, removing calcium ions and / or magnesium ions from original halogen extracted by a water solution method; 2, removing sulfate ions from the original halogen of which the calcium ions and / or the magnesium ions are removed by using a nano-filtration membrane denitration device; and 3, collecting high aqueous glauber salt and low aqueous glauber salt which are produced by the nano-filtration membrane denitration device respectively. In the invention, the nano-filtration membrane denitration device is used for denitrating the original halogen and can only be used for denitrating light salt brine generally in the prior art; the produced liquid salt reaches a standard of first-time salt brine, and the SO4<2-> content is less than 4g / l required by the requirement of the first-time salt brine and can be controlled to be less than 3g / l; the high aqueous glauber salt subjected to nano-filtration membrane denitration is used for preparing salt through hot press, and the energy consumption of the nano-filtration membrane denitration is about 20 percent less than that of multiple-effect vacuum evaporation; and the liquid salt has lower production energy consumption, salt slurry is not generated in the denitration method, and the denitration method is more environment-friendly compared with a chemical method.

Description

technical field

[0001] The invention relates to the technical field of raw halogen denitrification production equipment, in particular to a raw halogen denitrification production process and production equipment thereof. Background technique

[0002] my country's sodium sulfate type brine sulfate ion (SO 4 2- ) content is relatively high, and sulfate ion (SO 4 2- ) content continues to accumulate, and chemical removal methods, such as barium chloride, are usually used to remove sulfate ions, which is expensive and pollutes the environment. The investment and installation cost of the membrane denitration device is basically the same as the annual consumption cost of the barium chloride method to remove sulfate ions, while the total annual operating cost of the membrane denitrification device is only less than 1 / 3 of the cost of the barium chloride method.

[0003] Because of its energy-saving and environmental protection advantages, it can only be used for dechlorination ...

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