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A method for device utilization of salt cavity

A technology of salt cavity and mine salt, applied in safety devices, mining devices, earthwork drilling and mining, etc., to achieve efficient resource utilization, eliminate geological disasters, and reduce investment

Active Publication Date: 2019-04-05
江苏苏盐井神股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] The purpose of the present invention is to solve the above unsolvable problems, and has invented a relatively simple, short-term use of decommissioned waste wells as underground crystallizers (calcium sulfate crystallization settlement), storage devices (calcium sulfate, waste residue, etc.) The storage of insoluble and insoluble matter), so as to control the utilization method of geological disasters

Method used

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  • A method for device utilization of salt cavity

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Experimental program
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Effect test

Embodiment 1

[0032] Select the salt cavern that is about to be exploited, and use sonar cavity measurement technology to measure the volume size and shape of the underground dissolution cavity of the vertical well. The volume of the dissolution cavity is about 50,000 m 3 . Desulfurization gypsum (solid waste produced by power plant flue gas desulfurization, the main component of which is CaSO 4 2H 2 O) Pulverized to have an average grain size of about 50 μm, mixed with ammonia-soda waste liquid (soda-making waste liquid, CaCl 2 105g / L); the NaCl content is about 50g / L), and then the mixture is injected into the above-mentioned salt cavity after brine extraction, reaching 50% of the total volume of the salt cavity, and the pH of the downhole fluid is adjusted to 8.5 with CaOH aqueous solution, so that the ammonia CaCl in alkaline waste liquid 2 Precipitation of calcium sulphate crystals from reaction with sodium sulphate in mines. After two months, the brine was pumped out, and it was ...

Embodiment 2

[0034] Select the salt cavern that is about to be exploited, and use sonar cavity measurement technology to measure the volume size and shape of the underground dissolution cavity of the vertical well. The volume of the dissolution cavity is about 100,000 m 3 . Desulfurization gypsum (solid waste produced by power plant flue gas desulfurization, the main component of which is CaSO 4 2H 2 O) After pulverizing to an average grain size of about 50 μm, mix with ammonia-soda waste liquid (soda-making waste liquid, CaCl 2 105g / L); NaCl content is about 50g / L), and then inject the mixture into the above-mentioned volume of about 100,000m 3 In the salt cavity after the brine mining, it reaches 50% of the total volume of the salt cavity, and the pH is adjusted to 8.5 with CaOH aqueous solution, so that the CaCl in the ammonia alkali waste liquid 2 Precipitation of calcium sulphate crystals from reaction with sodium sulphate in mines. After two months, the brine was pumped out, and...

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Abstract

The invention provides a salt chamber device utilization method, which comprises the following steps of (1) selecting a salt chamber about to reach the mining time limit in a salt chamber of a well and rock salt mine field; measuring the volume size and the chamber shape of a plumb shaft underground dissolved chamber by using a Sonar technology; (2) injecting ammonia alkali waste liquid and desulfurized gypsum into the salt chamber, wherein the introduction quantity of the desulfurized gypsum is 1 to 5 weight percent of the ammonia alkali waste liquid; regulating the pH value of underground liquid by a calcium hydroxide solution, so that the calcium sulfate crystals generated by the ammonia alkali waste liquid and the underground sodium sulfate grow and partially fill the salt chamber; and (3) extracting out brine mined in the step (2), and then, filling the salt chamber by alkali slag to 50 percent to 70 percent of the volume of the salt chamber.

Description

technical field [0001] The technology belongs to the salt cavity utilization technology, specifically a method for utilizing the salt cavity as a device, specifically a method for exploiting the salt cavity as a crystallizer. Background technique [0002] Salt (NaCl) is an important industry related to the national economy and the people's livelihood, and occupies a very important position in the national economy. Salt is not only a necessity for human life, but also a raw material for soda ash and caustic soda industries. Salt is divided into sea salt, mine salt and lake salt according to different raw materials. Salt. [0003] my country has a history of mining salt mines for thousands of years, at least 1,000 years earlier than countries such as Russia and North America. What is mature is to use salt caverns to build oil / gas storage depots. Although my country has mastered the technology of salt cavern construction and established gas storage depots, the principle of esta...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E21F15/00E21F17/16C01D3/06
CPCC01D3/06E21F15/00E21F17/16
Inventor 刘正友张文广王桂春蒋海斌任必锐
Owner 江苏苏盐井神股份有限公司
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