04,27,2026 20 views
The 29th Chlor Alkali Industry Development Conference was successfully held in Kunming from April 15th to 17th, 2026. This conference will conduct in-depth discussions on core topics such as macroeconomic trends, green and low-carbon technologies, industrial chain transformation and upgrading, energy conservation and consumption reduction, and intelligent transformation. Dr. Yan Kangkang from Wanhua Chemical delivered a keynote report on the innovative application and practice of Wanhua Chemical membrane materials in the chlor alkali industry. The report systematically demonstrated Wanhua's use of independent membrane technology to solve key pain points in the chlor alkali industry, such as denitrification, water treatment, and energy conservation, injecting new momentum into the industry's green upgrading.
The chlor alkali industry is an important basic industry of the national economy, and products such as caustic soda, chlorine gas, and hydrogen gas are widely used in papermakingPVCKey fields such as new energy and water treatment are known as important barriers to industrial food and economic security. However, the industry has long faced challenges such as difficulty in refining and denitrifying salt water, high energy consumption of electrolytic cells, unstable quality of boiler feedwater, and high cost of wastewater treatment. especiallyraw materialExcessive sulfate ions in saltwater can directly lead to a decrease in electrolytic cell current efficiency, intensified corrosion of electrodes and ion membranes, and a decrease in product purity, becoming a key bottleneck restricting production stability and efficiency improvement.
In response to the pain points in the above-mentioned industries, Wanhua Chemical fully leverages its advantages in raw materials across the entire industry chain and its deep research and development accumulation to build a comprehensive membrane material solution covering "ultrafiltration+reverse osmosis+nanofiltration". This solution comprehensively covers processes such as water replenishment in the chlor alkali thermal power section and brine refining in the production section, providing one-stop technical support from the source to the end.
In the core scenario of chlor alkali salt water denitrification, Wanhua WNF5010-8040 nanofiltration membrane relies on precise pore size control and optimized surface charge performance,High permeability for monovalent salts and high retention rate for multivalent salts have been achieved, which can efficiently remove sulfate ions and stably control the concentration of SO ₄² ⁻ in the produced water below 1g/L, with a recovery rate of up to 90%Effectively protect the electrolytic cell, reduce power consumption, and extend the lifespan of core equipment.
In the thermoelectric section, Wanhua adopts TIPS process ultrafiltration membrane and anti pollution reverse osmosis membrane to form an efficient water replenishment and purification scheme. Ultrafiltration membrane prepared by autonomous thermally induced phase separation method,The membrane fibers are uniform, the cross-section is dense, and the acid and alkali resistance and oxidation resistance are significantly better than traditional wet process membranes. The chemical cleaning cycle is greatly extended, and the operating cost per ton of water is reduced by about 40%Anti pollution reverse osmosis membranes are designed with unique coatings and optimized flow channels,By achieving long continuous operation time and low cleaning frequency, the conductivity of raw water can be reduced from 400-600 μ S/cm to below 5 μ S/cmTo provide high-quality feedwater for boilers and ensure stable and efficient operation of the energy system.
At present, Wanhua Chlor alkali special membrane has been widely applied in multiple large-scale chlor alkali projects in Yantai, Ningbo, Fujian and other places, covering key links such as membrane denitrification, boiler water replenishment, and wastewater resource utilization, helping customers achieve multiple benefits such as energy consumption reduction, cost reduction, quality improvement and green emission reduction, and has won wide recognition in the industry. In the future, Wanhua Chemical will continue to deepen its research and development of separation membrane materials, focusing on core needs such as energy conservation, emission reduction, and quality improvement in the chlor alkali industry, and working together with industry partners to promote the deep integration of membrane technology and chlor alkali production.
