Poisonous slurry disposal method by replacing brine in salt rock old cavity with compressed air

Abstract

The invention discloses a poisonous slurry disposal method by replacing brine in a salt rock old cavity with compressed air. The method includes a center pipe and a technical casing, the technical casing penetrates between an abandoned salt cavity and a ground, the center pipe penetrates the bottom, in the abandoned salt cavity, of the technical casing, and a center pipe annulus is arranged between the center pipe and the technical casing. Compared with the prior art, the poisonous slurry disposal method has the advantages that the brine in the abandoned cavity can be turned into valuable industrial materials; the abandoned salt cavity can be turned into valuable underground disposal space; poisonous slurry can be effectively disposed to achieve the effect of environmental protection, and direct contact of the poisonous slurry with the brine can be avoided so as not to cause secondary pollution; the compressed air gradually released is turned into compressed air source and part of the power for the other disposal cavities to replace the brine, and the purpose of energy conservation is achieved.

Description

technical field [0001] The invention relates to a salt processing equipment, in particular to a method for disposing of toxic slurry after replacing the brine in the old cavity of salt rock with compressed air. Background technique [0002] The mining of salt wells and minerals in my country is mostly based on water solution mining, and a large number of abandoned solution cavities remain underground. These abandoned dissolution cavities are filled with saturated brine, if not handled properly, it will cause serious geological disasters and environmental hazards; Disposal is also an important issue that plagues relevant enterprises and environmental protection departments. Salt rock has the excellent properties of low porosity, low permeability, and stable chemical properties. From the experience of foreign countries, abandoned dissolution cavities with good geological conditions have been abandoned for thousands of years. The cavity stability and airtightness are still ver...

AI Technical Summary

Problems solved by technology

The problem is that the traditional waste disposal operations in salt caverns, such as alkali slag backfill and oilfield mud filling, are all through injecting waste slurry to gradually displace the brine in the cavity, which faces an inevitable problem: brine and The waste slurry will be exposed repeatedly, if the waste is toxic and harmful, the brine will also be polluted

[0004] Therefore, the existing technology cannot solve the problem that brine is not polluted when it is displaced by waste; it cannot avoid the problem that brine does not become a secondary pollution source

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