Method for extracting potassium from sea water by using continuous ion exchange method

A continuous ion and ion exchange column technology, applied in the field of seawater treatment by ion exchange, can solve the problems of low recovery rate, long operation cycle, unstable composition of potassium-rich liquid, etc., and achieve low cost, stable composition, and shortened operation cycle Effect

Active Publication Date: 2012-12-19
JINSHENG OCEAN TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The potassium-enriching steps involved in the above existing patented technologies all adopt fixed bed technology, intermittent operation, long operation cycle, the obtained potassium-enriched liquid is unstable, and the recovery rate in seawater is lower than 50%.

Method used

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  • Method for extracting potassium from sea water by using continuous ion exchange method
  • Method for extracting potassium from sea water by using continuous ion exchange method
  • Method for extracting potassium from sea water by using continuous ion exchange method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] The first step, simulate the setup of the moving bed

[0033] Complete the setting of the simulated moving bed as mentioned above, the whole continuous ion exchange device is divided into adsorption zone, elution zone and regeneration zone, wherein, in the adsorption zone, an adsorption unit is formed by 6 ion exchange columns 1 connected in series, so that each adsorption unit The mass transfer height is controlled to 6m, including three adsorption units, forming 3 columns; the elution area is composed of 3 columns in series, a total of 9 adsorbed and saturated ion exchange columns 1, and the mass transfer height is 9m during the elution process; the elution is completed The ion exchange column 1 of the process forms the regeneration area, and the regeneration area is composed of 3 columns in series with a total of 9 eluted ion exchange columns 1, and the mass transfer height of the regeneration process is 9m;

[0034] The second step, the adsorption process

[0035] ...

Embodiment 2

[0044] The first step, simulate the setup of the moving bed

[0045] Complete the setup of the simulated moving bed as described above, the above-mentioned whole continuous ion exchange device is divided into an adsorption zone, an elution zone and a regeneration zone, wherein, each layer in the adsorption zone is composed of three ion exchange columns 1 connected in series to form an adsorption unit, so that each The mass transfer height of the adsorption unit is controlled to 3m, including three adsorption units in total, forming 3 columns; the elution area is composed of 2 columns connected in series, a total of 6 adsorbed and saturated ion exchange columns 1, and the mass transfer height during the elution process is 6m; The ion-exchange column 1 that has completed the elution process forms a regeneration zone. The regeneration zone is composed of 4 columns in series and a total of 12 eluted ion-exchange columns 1. The mass transfer height of the regeneration process is 12m...

Embodiment 3

[0056] The first step, simulate the setup of the moving bed

[0057] Complete the setup of the simulated moving bed as described above, the above-mentioned whole continuous ion exchange device is divided into an adsorption zone, an elution zone and a regeneration zone, wherein, each layer in the adsorption zone is composed of five ion exchange columns 1 connected in series to form an adsorption unit, so that each The mass transfer height of the adsorption unit is controlled to 5m, including three adsorption units in total, forming 5 columns; the elution area is composed of 4 columns connected in series, a total of 12 adsorbed and saturated ion exchange columns 1, and the mass transfer height during the elution process is 12m; The ion-exchange column 1 that has completed the elution process forms a regeneration zone. The regeneration zone is composed of 2 columns in series and a total of 6 eluted ion-exchange columns 1. The mass transfer height of the regeneration process is 6m;...

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Abstract

The invention discloses a method for extracting potassium from sea water by using a continuous ion exchange method and relates to a method for treating the sea water by using an ion exchange method. The method comprises the following steps that a simulation moving table is arranged by using 36 continuous ion exchange devices consisting of ion exchange columns which are provided with jackets and filled with sodium type clinoptilolite; the simulation moving table is divided into an adsorption zone, an elution zone and a regeneration zone; the adsorption process is operated in the adsorption zone by layers and three layers are carried out in parallel; the concentration of potassium in the sea water as a raw material is 0.61-1.52g / L; the concentration of potassium in the drained sea water after adsorption is 0.01-0.15g / L; the elution process is operated in the elution zone by columns and three layers are carried out in series to obtain a potassium-rich solution and the concentration of K<+> in the potassium-rich solution is 36.00-44.12g / L; and the regeneration process is operated in the regeneration zone by columns and three layers are carried out in series to obtain ammonium-containing salt water. The adsorption, elution and regeneration processes are simultaneously and continuously operated, and thus the operation period is shortened, the efficiency is increased, the cost is reduced and economic benefits are improved.

Description

technical field [0001] The technical scheme of the present invention relates to treating seawater by ion exchange, specifically a method for extracting potassium from seawater by continuous ion exchange. Background technique [0002] Potassium is one of the three elements of fertilizer. The content of potassium in plants is second only to nitrogen, and it is an essential element in the process of plant growth and development. In addition, potassium is widely used in industries such as chemical industry, petroleum and medicine. At present, domestic and foreign potassium products are mainly processed from land solid potassium ore or salt lake brine. Due to the shortage of terrestrial potash resources in my country and mainly relying on imports, it is very necessary to develop new technologies for developing seawater potash resources with a total reserve of 550 trillion tons. [0003] The existing technology of seawater potassium extraction method includes chemical precipita...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01D3/06
Inventor 袁俊生郭小甫谢英惠王军刘燕兰李非
Owner JINSHENG OCEAN TECH CO LTD
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