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The Equipment System of Ion Exchange- Haihuilongzhou Co., Ltd

Petrochemicals Industry

The Equipment System of Ion Exchange- Haihuilongzhou Co., Ltd...

Project Name: An Equipment System of Ion Exchange for Haihuilongzhou Co., Ltd.

Handling Capacity: 50-60T/h

Project Objective: Solution Composition

Anion: sulfate radical

Cation: lithium, sodium, potassium, calcium and magnesium

Operating Temperature: >60℃

Outlet Requirements: Ca2+、Mg2+<5ppm

Operating Mode: continuous operation( switch to regenerate at fixed period)

Working Process of Ion Exchange

Working Process: loading, operating, ejecting, backwashing, regenerating, washing and reserving.

I. The Meaning of Adsorbent for Purifying Lithium Liquid

Demand for lithium carbonate is growing rapidly in China as lithium batteries are applied in new energy vehicles. The purity of lithium carbonate has a major impact on the performance of lithium batteries. However, as the second largest producer of lithium carbonate in the world, we cannot meet the growing demand for high purity lithium carbonate. The high purity of lithium carbonate imported to Japan every year is a great obstacle to the development of new energy industry in China. The main purpose of the application of ion exchange is to remove impurities, so the adsorbent should have high resistance to the interference of monatomic ion. The concentration of monatomic ion is very big, and the traditional resin exchange efficiency of cation exchange is easily been influenced, so this project adopts the special adsorbent. This kind of adsorbent can absorb alkaline-earth metal ions( calcium, magnesium, strontium, barium), other divalent ion and above metal ions from alkali(lithium, sodium and potassium) in salt solution.

II. Working Mechanism of Adsorbent

When the raw water containing calcium and magnesium ions passes the adsorbed layer of ion exchange, the calcium and magnesium ions in water have a chelation reaction with adsorbent, releasing hydrogen ions at the same time. The water that flows out of the exchange is removing divalent ion. When the adsorbent reaches a certain degree, the water hardness increases. Then the adsorbent will be regenerated automatically in accordance with the scheduled program. A higher concentration of acid-base solution passing through adsorbent is helpful to restore of disabled adsorbent.

III. Basic Conditions of Designing

As the leading in our country, the purification is mature and reliable, economical and practical, and stable as well.

Our designing and manufacturing water treatment equipment is of advancement, high performance, low cost, high efficiency, flexible adjustment and good characteristic of start-stop control. It has many advantages, such as safe, economical and full load operation, and easy to maintenance etc.

Provide enough information to introduce technical conditions, data and operating manual of controlling requirement, controlling mode, sequence controlling and interlock protection to the softening equipment of lithium liquid.

IV. Design Features

1. The operation is stable. The adsorbents are not easily confused, and the contact between feed liquid and the adsorbent is effective.

2. The design of the bed is not easily broken and the mechanical loss is small.

3. Adopting unique operating mode, after completely invalidated, the ion exchanger is regenerated. The regeneration liquid is efficient, complete and saved.

4. With a sufficient backwash space, an adequate backwashing can be done to the adsorbent. It saves the backwashing equipment of the external adsorbent.

5. Adopting the special adsorbent just removes divalent and above metal ions, and the lithium in the liquid is not damaged.

6. After regeneration, setting up the washing step and equipped with the chlorine ion on-line monitoring instrument to monitor the washing effect in real time, and not get chlorine ions into the system.

7. Set up the step of demineral water, and collect the liquid with demineral water before regenerating. After regenerating, get the liquid back into the exchange column and make sure no loss of lithium ion.

The process is controlled by the upper part of the DOS, and it is equipped with the necessary on-line control instrument, which is manpower saved, convenient operation and supervisory control to the whole process.