Focused on the research and development and production of resin materials and resin end products - Hebei Lijiang
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AboutHebei Lijiang Biotechnology Co., Ltd. is a new material manufacturer specializing in the production of functional special ion exchange resins and disposable blood perfusion devices. It is a modern high-tech enterprise integrating the research and development, production, sales, and service of resin materials and resin end products. The company was established in April 2014 with a registered capital of 52 million yuan. It plans to cover an area of 267 acres and is located in the High-tech Industrial Park of Weixian County, Hebei Province—New Material Demonstration Park. The total investment is 510 million yuan. It is a council member unit of the Ion Exchange Resin Branch of the China Membrane Industry Association.
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Product
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BlogsThe company will focus on the high-end market, with the purpose of serving society, solidly carrying out technological innovation and product promotion, continuously improving the development and expansion of ion exchange resin products in emerging application fields, thereby promoting the upgrading and development of related industries.
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Company AlbumThe current phase of construction has been fully completed and put into operation, featuring a comprehensive workshop with 42 production lines for functional ion exchange resins with an annual output of 16,800 tons and a production capacity of 30,000 tons, a wastewater treatment plant with an annual treatment capacity of 403,000 tons, and a workshop producing 5,000 tons of medical-grade magnesium sulfate annually. Trial production began in July 2016, with official production starting in January 2017.
How to prevent resin contamination and how to handle it
Release Time:
2015-03-19
To prevent resin contamination, it is necessary to control various water treatment process indicators and implement strict checks at every stage. For example:
1. To ensure effective coagulation and clarification treatment, the correct coagulant must be selected, and the optimal dosage determined through testing to prevent the migration of aluminum and iron salts. The turbidity of the effluent from sand filters and activated carbon filters must be strictly controlled. Al³⁺ and Fe³⁺ should be less than 0.3 mg/L; chemical oxygen demand (COD) should be less than 1 mg/L. Organic substances are adsorbed through activated carbon filtration.
2. Proper sterilization and algae removal during pretreatment must be done, controlling the residual chlorine level before entering the cation exchanger.
3. To prevent impurities in the regenerant from contaminating the resin, in addition to selecting high-quality regenerants, anti-corrosion measures must be taken for containers during transport and storage. Mixing of different loads must be avoided, and dedicated vehicles and storage containers should be used.
4. Compressed air that may contact the resin must be purified and oil removed; unpurified air must not be drawn from blowers of the carbon dioxide removal unit; near the water intake, oil docks or oil tanker berths must be prohibited to prevent oil pollution of the water.
5. Regularly blow resin with compressed air to remove suspended solids, organic matter, and iron. This not only cleans but also prevents resin contamination. Although various measures are taken to prevent resin contamination, after some operation time, resin contamination may still occur, which is common in desalination water treatment.
The following measures can be taken to address this:
(1) Anion exchange resins are the most susceptible and severely affected by contamination. When anion resins are contaminated, alkaline brine treatment can be used with the following requirements: The alkaline brine method adds caustic soda to increase the solubility of humic substances, adjusting the pH to 10 with a NaCl to NaOH ratio of 5. This method can remove over 90% of organic matter. Heating the solution appropriately improves treatment effectiveness. If cation resins are contaminated, acid or brine treatment can be used to remove contaminants under the following conditions:
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Acid or brine concentration |
Soaking time, hours |
Flow mode |
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10% HCl |
6 |
4 hours, 2 m/h flow rate |
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15% NaCl |
30 |
15 hours, 2 m/h flow rate |
(2) When contamination is severe, add an appropriate amount of sodium hypochlorite (generally less than 0.5%) to the alkaline brine solution to oxidize and decompose humic organic substances.
(3) Change the hydrophobicity of the anion resin polymer backbone to hydrophilicity. The polystyrene-based polymer backbone is hydrophobic, similar to humic acid, and both have strong molecular attraction, making desorption difficult. Using a hydrophilic acrylic polymer backbone, which has weaker intermolecular attraction, allows organic matter entering the resin to be more easily desorbed after alkaline regeneration treatment. To prevent resin contamination and maintain good ion exchange performance, it is necessary to regularly and systematically perform resin rejuvenation treatments.
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24-05-14 14:37:56
