1. Project overview Case of a seawater desalination project of a non-ferrous metal plant in Qinghai|Special treatment of high-salt brackish water in the plateau
This project is located in the non-ferrous metal Industrial Park in northwestern Qinghai. The factory area is located in the Gobi area of the plateau. There is no high-quality municipal freshwater resource. It can only access underground brackish water and surface water around salt lakes on the spot. The water quality is extremely high in salt content, close to the characteristics of seawater, and cannot be directly used for production.
2. Raw water quality issues and project background
The water source of the non-ferrous metal plant in the Qinghai Plateau is typical high-salt brackish water, and the water quality problem is very prominent.Raw water not only contains far more salt and mineralization than ordinary groundwater, but also contains a lot of suspended solids, sediment, and colloidal impurities. At the same time, the water body has high hardness and strong corrosion resistance.In addition, the local temperature difference between day and night is large, and the low temperature in winter is severely cold, the water quality fluctuates significantly with the season, and the stability is extremely poor.
Customized desalination equipment
3. Customized solutions
Combining the special environment of high altitude, low temperature and low pressure in the Qinghai Plateau, as well as the high-standard water needs of the non-ferrous metal industry, DIEN water treatment adopts general-purpose equipment solutions and is tailored to adapt to the seawater desalination treatment technology of industrial and mining enterprises to solve the water quality pain points of high salt, high hardness and easy fouling.
The whole system adopts the core process of ”enhanced pretreatment + two-stage reverse osmosis deep desalination + anti-fouling, voltage regulation and regulation".The pre-installed multi-stage filter unit first intercepts sediment, suspended solids, and large-particle impurities in the water, reduces the turbidity of raw water, and protects the core membrane elements at the back end.Then through the two-stage reverse osmosis system, the salt, heavy metals, high-hardness ions and various soluble pollutants in the water are deeply removed, and the problems of substandard water quality and pipeline fouling and corrosion are solved from the root cause.
The equipment has been specially upgraded for plateau working conditions, and the overall insulation and antifreeze structure, low-pressure adaptation system and anti-corrosion pipeline have been installed to adapt to the sub-zero low temperature environment in Qinghai in winter to prevent equipment freezing and cracking, attenuation of desalination efficiency, pipeline blockage and other failures.The equipment is equipped with a fully automatic intelligent control system, which supports automatic flushing, intelligent start and stop, and fault alarm. There is no need for special personnel to be on duty, and it is adapted to the water rhythm of the factory's 24-hour continuous production.
4. the treatment effect
After the complete set of seawater desalination equipment is put into operation, it will operate stably throughout the process, perfectly adapting to the complex working conditions of the plateau and the high-intensity water needs of non-ferrous metal production.The desalination rate of the equipment is stable and up to standard, the water quality of the effluent is pure, and the water quality parameters are balanced, which fully meets the production water standards for all scenarios such as mineral processing, smelting, equipment cooling circulation, and environmental protection and water replenishment.
After the completion of the transformation, the problems of pipeline fouling, equipment corrosion, and high water quality fluctuations in the past were completely solved, the equipment failure rate decreased significantly, and the production line was no longer shut down for rectification due to water quality problems.The utilization rate of water resources has been significantly improved, saying goodbye to the high-priced outsourcing model of industrial pure water, greatly reducing the long-term production water costs and equipment operation and maintenance costs of enterprises, and helping enterprises to produce efficiently, in compliance with regulations, and at low cost.
Customized desalination equipment
5. True customer feedback
The project leader of the plant said that the fault tolerance rate of water used in the non-ferrous metal industry is very low. Ordinary water purification equipment has been used before, but it can't carry the high salt water quality of the plateau at all, and there are frequent problems, which especially affect the production progress.The set of seawater desalination equipment customized by DIEN is highly targeted and highly adaptable. It operates stably throughout the year. It can produce water normally in the low temperature environment in winter, and the water quality has been stable and up to standard.
At the same time, the customer also admitted that after comparing a number of manufacturers, it was found that DIEN's seawater desalination equipment is very cost-effective, there are no inflated quotations and invisible additions, and the equipment configuration, process plan, and quotation details are all open and transparent.From the early site survey and program customization, to the late installation and commissioning, and after-sales maintenance, the one-stop service is very professional, worry-free and reliable.In the follow-up expansion and transformation of the plant and the addition of water treatment equipment, we will continue to choose long-term cooperation with DIEN water treatment.
