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Sodium nitrate separation system and frozen nitrate production method applying same

A technology of separation system and frozen nitrate, which is applied in the field of frozen nitrate production and salt nitrate separation system, can solve the problems of increasing the economic risk of industrial production, consuming steam, and multiple process steps, so as to expand the exploitable reserves, prolong the exploitable life, The effect of reducing mining costs

Active Publication Date: 2020-11-17
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this invention requires more process steps and corresponding devices, and the operation process needs to consume steam. The larger the industrial production capacity, the larger the device structure and the greater energy consumption are required, and the unit economic value of the main and by-products produced is not high. Not too high, which restricts the possibility of large-scale quantitative production in industrial practical applications and increases the economic risk of actual industrial production

Method used

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  • Sodium nitrate separation system and frozen nitrate production method applying same
  • Sodium nitrate separation system and frozen nitrate production method applying same
  • Sodium nitrate separation system and frozen nitrate production method applying same

Examples

Experimental program
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Effect test

Embodiment 1

[0041] Such as Figure 1 to Figure 3 As shown, a salt and nitrate separation system includes a three-dimensional mining system for circulating leaching of the nitrate-containing formation 1, a slope freezing system for freezing the brine collected by the three-dimensional mining system, and a slope freezing system for freezing the brine collected by the three-dimensional mining system. A solid-liquid separation system that separates the mother liquor and crystals output by the nitrification system. The slope freezing nitrification system is provided with a brine storage tank 5 that communicates with the three-dimensional mining system through a brine delivery pipeline 4. The brine storage tank 5 It is connected with the brine pumping distribution system 7 arranged on the slope freezing nitrification system, and the solid-liquid separation system is located at the bottom of the slope freezing nitrification system.

[0042] Wherein, the three-dimensional mining system includes a...

Embodiment 2

[0051] A production method of frozen nitrate, said production method of frozen nitrate comprises the following processing steps:

[0052] S1: Extract an appropriate amount of surface water or well water from the mining area, or supplement with frozen nitric acid mother liquor, and spray it directly to the spray ditch network on the nitric acid formation 1 through the brine leaching system 2. When enough brine collection tank 3 accumulates The brine is seeped down, and then the brine leaching system 2 extracts the brine from the brine collection tank 3 and continuously sprays it to the spray ditch network to perform a rinsing cycle;

[0053] S2: When the brine concentration in the brine collection tank 3 reaches the target value, pump the brine to the brine storage tank 5 through the brine delivery pipeline 4, and start a new round of S1;

[0054] S3: When the weather conditions are suitable for freezing, the brine containing nitrate is pumped from the brine storage tank 5 thro...

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Abstract

The invention discloses a salt-sodium nitrate separation system, which comprises a three-dimensional mining system used for circularly leaching a nitrate-containing stratum, a slope nitrate freezing system used for carrying out nitrate freezing treatment on brine collected by the three-dimensional mining system, and a solid-liquid separation system used for separating mother liquor and crystals output by the slope nitrate freezing system, wherein the slope nitre freezing system is provided with a brine storage pool communicated with the three-dimensional mining system through a brine conveyingpipeline, the brine storage pool is connected with a brine pumping distribution system arranged on the slope nitre freezing system, and the solid-liquid separation system is located at the bottom ofthe slope nitre freezing system. According to the invention, sodium sulfate in mixed brine is thoroughly separated out in a solid form through low-temperature sodium sulfate freezing, the salt and sodium sulfate separation operation process is optimized through a method of cooling and crystallizing falling film brine on a slope system through natural force, and the method has the beneficial effects of being stable in production output and simple in device structure, so that the industrial target of low-cost large-scale automatic production is achieved.

Description

technical field [0001] The invention relates to the fields of energy saving, environmental protection and salt chemical industry, in particular to a salt and nitrate separation system and a frozen nitrate production method using the same. Background technique [0002] At present, the mining of nitrate ore and the production of sodium sulfate are mainly based on solid nitrate ore as raw material, and the nitrate-containing ore is mined and transported to the factory area, where it is melted, purified, and recrystallized to produce anhydrous sodium sulfate (yuan Mingfen). Many mine pits were left in the former mining area, but sand hills were piled up in the factory area, which destroyed the environment. As far as the general law of salt lake evolution is concerned, salt and nitric acid are mostly symbiotic. Sodium sulfate has the property of having a particularly low solubility at low temperatures. Accordingly, the modern salt salt industry widely utilizes salt ponds to fre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01D5/00
CPCC01D5/004Y02P20/10
Inventor 陈旗新陈羿材曾永平
Owner JINAN UNIVERSITY