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CO2 mineralization and seawater resource utilization coupling method

A seawater and resource technology, applied in chemical instruments and methods, calcium/strontium/barium compounds, seawater treatment, etc., can solve problems such as low production efficiency, low enthusiasm for mineralization and emission reduction, and high processing costs, and increase process additional value, solve the CO2 emission reduction problem, and improve the effect of utilization efficiency

Inactive Publication Date: 2017-06-30
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The present invention breaks through the existing technology due to CO 2 The added value of mineralization products is low, and people carry out CO 2 CO caused by low enthusiasm for mineralization emission reduction 2 The bottleneck of industrialized implementation of mineralization technology is difficult, and at the same time it helps to overcome the problems of low production efficiency and high treatment costs caused by a large amount of scaling in the process of utilizing seawater resources

Method used

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  • CO2 mineralization and seawater resource utilization coupling method

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Effect test

Embodiment 1

[0023] Introduce 1L of seawater with a calcium ion content of 0.4g / l and a magnesium ion content of 1.28g / l into the premix tank through a pump or a high-level tank, and add magnesium oxide to the seawater. The magnesium content in magnesium oxide is the same as the calcium content in the total seawater. The molar ratio of the magnesium oxide is 1:1, fully stirred for 200min at 20°C, and the magnesium oxide and seawater are fully mixed evenly. Use a pump to make the fully mixed slurry enter the primary mineralization reactor, and the temperature in the reactor is controlled at 20°C. At the same time, carbon dioxide is charged into the reactor at a rate of 2L / h through the aeration device, and the CO 2 React with calcium ions in seawater for 60 minutes and stop the reaction. The feed liquid after a mineralization reaction is sent to the separation equipment for solid-liquid separation, the liquid phase is analyzed for calcium and magnesium ions, and the solid phase 0.38g is us...

Embodiment 2

[0026] Introduce 1L of underground brine with a calcium ion content of 0.8g / l and a magnesium ion content of 2.05g / l into the premix tank through a pump or a high-level tank, and add magnesium oxide to the seawater. The magnesium content in magnesium oxide is the same as the calcium content in the total seawater. The molar ratio of magnesia is 2:1, fully stirred at 80°C for 40 minutes, and the magnesium oxide and seawater are fully mixed evenly. Use the pump to make the fully mixed slurry enter the primary mineralization reactor, and the temperature in the reactor is controlled at 80°C. At the same time, the reactor is charged with carbon dioxide at a rate of 20L / h through the aeration device, and the CO is controlled to 2 React with calcium ions in seawater for 10 minutes and stop the reaction. The feed liquid after a mineralization reaction is sent to the separation equipment for solid-liquid separation, the liquid phase is analyzed for calcium and magnesium ions, and the s...

Embodiment 3

[0028] Introduce 1L concentrated seawater with a calcium ion content of 1.0g / l and a magnesium ion content of 3.2g / l into the premix tank through a pump or a high-level tank, and add magnesium oxide to the seawater. The magnesium content in magnesium oxide is the same as the calcium content in the total seawater. The molar ratio of magnesia is 3:1, fully stirred at 60°C for 120 minutes, and the magnesium oxide and seawater are fully mixed evenly. Use a pump to make the well-mixed slurry enter the primary mineralization reactor, and the temperature in the reactor is controlled at 60°C and stirred. At the same time, carbon dioxide is charged into the reactor at a rate of 9L / h through the aeration device, and the CO is controlled to 2 React with calcium ions in seawater for 40 minutes and stop the reaction. The feed liquid after a mineralization reaction is sent to the separation equipment for solid-liquid separation, the liquid phase is analyzed for calcium and magnesium ions, ...

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Abstract

The invention relates to a CO2 mineralization and seawater resource utilization coupling method. According to the method, magnesium oxide is added to a seawater solution, acid gas CO2 is trapped by using alkalinity produced during hydrolysis of magnesium oxide in the solution, meanwhile, carbonate and bicarbonate radicals after CO2 trapping are mineralized by using calcium and magnesium ions in seawater, calcium carbonate and magnesium carbonate are obtained through regulation, and CO2 mineralization and seawater resource utilization coupling is realized. The method can be conducted at the low temperature, calcium-rich and magnesium-rich resources rich in the seawater are directly utilized, preparation of calcium chloride and magnesium chloride solutions is not required, and the method is a green and efficient CO2 emission reduction and efficient seawater resource utilization coupling method.

Description

technical field [0001] The invention belongs to CO 2 Field of mineralization fixation technology. Specifically, the use of calcium and magnesium resources in seawater to make CO 2 A new process method for storing solid carbonates such as calcium carbonate or magnesium carbonate. Background technique [0002] The greenhouse effect is the biggest environmental problem facing all mankind in the 21st century. The CO produced by human consumption of fossil fuels in the energy system 2 It is the most important substance that causes global warming. As the most populous and largest developing country in the world, China has made remarkable achievements in economic construction in recent years. However, with the development of the economy and the continuous growth of the population, the demand for energy is also increasing. my country's current CO 2 China's emissions have ranked second in the world, second only to the United States. my country's CO in the next few years 2 Chi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01F11/18C01F5/24C02F9/04C02F103/08
CPCC01F11/181C01F5/24C02F1/001C02F1/5236C02F2103/08
Inventor 赵颖颖袁俊生谢英惠王军刘杰纪志永郭小甫王士钊李非
Owner HEBEI UNIV OF TECH
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