In northwest Gansu, Ningxia, Xinjiang, Qinghai and other regions, many factories, farms, villages and towns mainly rely on well water as raw water for water supply.Many users have reported that ordinary reverse osmosis water treatment equipment is used in northwest well water, which is prone to membrane blockage, fouling, winter shutdown, unstable water quality and other problems.
This is because the water quality of well water in the northwest is very different from that of surface water and municipal tap water in the south, and ordinary equipment cannot be adapted to local water quality conditions at all.If you want the equipment to operate stably for a long time and reduce operation and maintenance costs, you must choose a dedicated reverse osmosis equipment for well water with exclusive configuration.Today, combined with the experience of on-site commissioning in many places in Northwest China, we will share the main points of targeted selection, configuration standards and pit avoidance techniques to help everyone choose suitable well water filtration equipment.
Northwest well water special reverse osmosis equipment to find DIEN water treatment
1. The core water quality characteristics of Northwest well water
The geology of the Northwest region is special and the climate is dry. Groundwater has been penetrated and concentrated through rock formations for a long time, forming high-load and high-fluctuation water quality characteristics, which is also the core reason why equipment is prone to problems.The hardness of the water quality in the northwest is high, and the hardness of well water in most areas far exceeds the national standard. Long-term operation can easily cause large-scale fouling of pipelines and membrane components; secondly, the content of sediment is large, and the turbidity of well water increases significantly after windy and sandy weather, and impurities precipitate more; moreover, iron and manganese ions generally exceed the standard, which is likely to cause oxidation and pollution of the membrane surface; and finally, the water temperature in winter is extremely low, and the low temperature will directly reduce the membrane flux, resulting in a smaller amount of water out of the water and a decrease in desalination rate.These problems are superimposed together, and ordinary water purification equipment will frequently fail in less than half a year. This is also the core reason why Northwest must customize special reverse osmosis equipment for well water.Therefore, we can draw a conclusion: the special properties of Northwest well water with high hardness, high sediment, excessive ferromanganese, and low temperature make it impossible to choose general reverse osmosis equipment.The core of the selection is to strengthen the pretreatment, adapt to the high-pressure anti-pollution film, and improve the antifreeze configuration.
2. Pretreatment must be strengthened to prevent frequent film blocking in the later stage
In view of the short-term water quality of Northwest well water, the pretreatment system is the core key of the complete set of reverse osmosis water treatment equipment, and it must not adopt a standard low-profile configuration.
The conventional configuration needs to be fully upgraded: high-efficiency quartz sand filters must be installed to intercept well cement sand and suspended solids in a targeted manner; activated carbon filters must be used to remove heterochromatic odors, residual chlorine and some heavy metals; and water softeners must be installed to solve the problem of high hardness and fouling.For well water with excessive ferromanganese, a separate ferromanganese filter device needs to be configured to avoid oxidative damage to the membrane element.
The end must be equipped with a precision filter, and a thickened filter element must be selected to prevent fine impurities from entering the RO host.Many low-cost equipment failures occur frequently. The essence is to cut corners in pretreatment, which seems to save money. The cost of film replacement and maintenance in the later stage will increase significantly.Reliable reverse osmosis equipment manufacturers will customize a full set of pretreatment systems on demand based on on-site water quality testing data.
3. Selection points of membrane element, pressure and antifreeze configuration
The selection of Northwest well water equipment, host parameters and antifreeze design directly determine the operating stability of the equipment throughout the year, which is the core point that distinguishes it from ordinary equipment.
In terms of membrane components, priority is given to anti-pollution low-pressure reverse osmosis membranes, which are suitable for high-mineralization well water, pollution-resistant and anti-fouling, and can be effectively adapted to the complex water quality of the Northwest and extend the service life.In terms of pressure selection, high-hardness and high-salinity well water needs to be matched with high-pressure pumps to ensure sufficient osmotic pressure and avoid incomplete desalination and excessive water quality due to low pressure.
The antifreeze configuration is exclusive to Northwest.In the low-temperature environment in autumn and winter, the water stored in the equipment pipeline can easily freeze and crack, and the low-temperature activity of the membrane components deteriorates.The formal configuration requires the installation of pipeline thermal insulation, equipment room thermal insulation design, and automatic emptying device. After the equipment is shut down, the water in the pipeline will be automatically emptied to completely eliminate the problem of frozen pipes and frozen membranes.
Northwest well water special reverse osmosis equipment to find DIEN water treatment
4. Common faults and avoidance schemes of well water equipment in Northwest China
Combined with many years of on-site operation and maintenance experience, the high-frequency failures of well water filtration equipment in the Northwest region are concentrated in three points, and all have mature avoidance schemes.
One is the rapid fouling and clogging of membrane elements. The way to avoid it is to complete the softening pretreatment, add salt regularly to regenerate, and monitor the normalization of water quality; the second is that the water volume drops sharply in winter, which can be improved through thermal insulation configuration and the selection of low-pressure cold-resistant membrane elements; the third is that ferromanganese pollution leads to yellowing of water quality and increased electrical conductivity. The pretreated filter material needs to be cleaned regularly and the filter element replaced on time.
As long as the early configuration is in place and the later operation and maintenance specifications are standardized, the special reverse osmosis equipment for well water can achieve stable operation throughout the year, greatly reducing the probability of failure and shutdown.
5. DIEN water treatment customization and service advantages
General-purpose equipment on the market cannot be adapted to the special well water quality in Northwest China. If you want to do it once and for all, a customized solution is the best choice.As a professional reverse osmosis equipment manufacturer, DIEN Water treatment has been deeply engaged in the northwest water treatment market for many years and is familiar with the pain points of well water quality in various places.Support the customization of a full set of equipment configuration on demand, according to the user's raw water detection data, water consumption, and site environment, targeted matching of pretreatment, high-pressure systems, and antifreeze devices to eliminate redundant or insufficient configuration.At the same time, it provides a one-stop service for the installation and commissioning of equipment, and provides on-site survey, installation, commissioning, and training throughout the process to solve user installation, operation and maintenance problems, and adapt to various scenarios such as factories, aquaculture, and commercial water supply.
