System for extracting deep intercrystalline brine in salt lake mining area

Abstract

The invention relates to a system for extracting deep intercrystalline brine in a salt lake mining area. The system comprises an air compressor which is arranged on a salt lake mining layer, and an air-injection well, brine collecting wells and a brine conveying channel, which are formed in the salt lake mining layer in a digging manner, wherein the air compressor is connected with a high-pressure air pipe by an air reservoir; the high-pressure air pipe extends into the air-injection well; a brine tail liquid injection pipeline is arranged in the air-injection well; the brine collecting wells are distributed around the air-injection well; a brine conveying pipeline is arranged in each brine collecting well; a brine collecting pump is arranged in each brine collecting well and is connected with one end of the corresponding brine conveying pipeline; the other end of each brine conveying pipeline is connected with the brine conveying channel; sealing materials are arranged between the high-pressure air pipe and the brine tail liquid injection pipeline, between the high-pressure air pipe and the wall of the air-injection well, and between the brine tail liquid injection pipeline and the wall of the air-injection well respectively. According to the system, intercrystalline brine and deep brine can be pressed out by using compressed air, and simultaneously tail liquid after potassium extraction can be used for resolving low-grade solid potassium or high-grade solid potassium after dilution, so as to realize the aim of fully utilizing resources.

Description

technical field [0001] The invention relates to a system for extracting salt lake brine, in particular to a system for extracting deep intercrystalline brine in a salt lake mining area. Background technique [0002] 75% of the world's potassium reserves are in Canada and Russia. At present, the production of potassium chloride in China is concentrated in the salt lake of Qaidam Basin. The salt lakes in the Qaidam Basin have large total potassium reserves (up to 1 billion tons), low basic reserves (245 million tons, accounting for 23.4%), even less designed recoverable reserves (116 million tons, accounting for only 11.1%), and low Grade solid potassium resources account for a large proportion (340 million tons). At the same time, with the vigorous development of potassium resources, the blind and excessive exploitation has led to serious overexploitation of intercrystalline and pore latent brine in Chaerhan Salt Lake, as well as intercrystalline and pore pressurized brine,...

AI Technical Summary

Problems solved by technology

At the same time, with the vigorous development of potassium resources, the blind and excessive exploitation has led to serious overexploitation of intercrystalline and pore latent brine in Chaerhan Salt Lake, as well as intercrystalline and pore pressurized brine, resulting in a significant drop in the brine water level in the mining area, forming a large area of ​​dredging. In the dry area, the high-grade solid potassium resources are further depleted, and a large amount of solid potassium chloride cannot be dissolved and extracted

[0003] The existing brine extraction mainly includes canal mining and well mining. If factors such as recharge and solid-liquid conversion are not considered, at most the brine that flows out of the pores under the action of gravity can only be extracted.

Images