INTRODUCTION

Quartz sand filters are extremely common and practical filtering equipment in the field of water treatment. They mainly consist of a filter tank, quartz sand filter media, a water distribution device, a water collection device, as well as related inlet and outlet pipelines and valves.

The filter tank, as the outer shell of the entire equipment, is usually made of carbon steel or stainless steel, possessing good pressure resistance and corrosion resistance, and can provide stable protection for internal components. Quartz sand filter media is the core element. It is a granular material processed from natural quartz ore through crushing, screening and other processes. It has characteristics such as high hardness and stable chemical properties. The particle size of the quartz sand is selected and matched according to different filtration requirements and then evenly filled in the tank to form a filtration layer.

The water distribution device enables the water to be filtered to be evenly sprinkled on the upper layer of the quartz sand filter media, ensuring that the water flow passes through the filter media layer evenly. The water collection device is responsible for collecting the filtered clean water and discharging it through the outlet pipeline. This equipment comes in a variety of specifications and can be flexibly selected according to the water treatment volume and water quality requirements. It can range from meeting the water filtration needs of households and small commercial places on a small scale to being suitable for large-scale water treatment projects in industrial production and municipal water supply. Moreover, it is easy to install, simple to operate, and runs stably and reliably, continuously and effectively purifying water quality.

WORKING PRINCIPLE

The working principle of quartz sand filters is based on the physical filtration effect of quartz sand filter media. When the raw water containing impurities enters the filter tank from the inlet, it first passes through the water distribution device. The water distribution device evenly disperses the water, making it flow onto the surface of the quartz sand filter media in a dispersed manner.

Subsequently, the water begins to permeate downward through the quartz sand filter media layer. Since there are certain pores between the quartz sand particles, and the size of these pores is relatively fixed, impurities in the water with particle sizes larger than the pores of the quartz sand, such as sediment, rust, and suspended solids, will be intercepted on the upper layer of the quartz sand filter media and in the pores between the particles, and cannot continue to pass through with the water flow. However, water and substances with particle sizes smaller than the pores of the quartz sand, such as some small-molecule substances dissolved in water, can smoothly pass through the filter media layer and continue to flow downward. Finally, the relatively clean water is collected by the water collection device and flows out from the outlet, thus achieving the preliminary filtration of the raw water and removing most of the visible large-particle impurities in the water, improving the clarity of the water quality.

 MAIN PERFORMANCE AND CHARACTERISTICS

l High-Efficiency Filtration Capacity: Thanks to the reasonable particle size matching of quartz sand filter media and its stable physical filtration performance, it has an excellent interception effect on common large-particle impurities in water. It can effectively remove sediment, rust, suspended solids and other substances in water, significantly reduce the impurity content in water, make the water clearer and more transparent, and meet the requirements for the basic clarity of water quality in many water use scenarios. It can play a good role in both domestic water use and general industrial water filtration.

l Stable and Reliable Operation: The overall structure is relatively simple, and the main components are of reliable quality. Moreover, the quartz sand filter media itself has stable chemical properties and is not easy to react with water or substances in water. Under normal operating conditions, the equipment is not prone to malfunctions and can operate stably for a long time, continuously providing a relatively stable water quality guarantee for the water use system, reducing problems such as water quality fluctuations caused by equipment failures, and also reducing the maintenance cost.

l Cost-Effectiveness Advantage: Quartz sand, as a filter medium, has a wide range of sources, a relatively low price, and is easy to obtain. After being used for a period of time, its filtration performance can be partially restored through simple backwashing operations, extending its service life and greatly reducing the operating cost of the equipment. Compared with some filtering equipment using expensive filter materials, it has more economic advantages while achieving basic filtration effects, and is suitable for use in various places that are more sensitive to costs.

l Wide Range of Adaptability: It can be applied to treat water from a variety of different sources, such as municipal water supply, industrial circulating water, domestic sewage, and groundwater. Although it mainly filters large-particle impurities, by cooperating with other subsequent treatment processes or adjusting the particle size of quartz sand and other parameters, it can also adapt to different water quality conditions to a certain extent. It can play a role in many water treatment links and has good versatility.

l Simple and Easy Operation: The operation process of the equipment is not complicated. Workers only need to control the inlet and outlet of water and carry out regular backwashing and other routine operations according to the specified time interval. There is no need for complex professional knowledge and skills. Ordinary personnel can master the operation method proficiently after simple training, facilitating its promotion and use in places of various scales.

 APPLICATION FIELDS AND INDUSTRIES

l Industrial Field: In many industrial production processes, such as in the chemical, steel, and power industries, a large amount of industrial water containing impurities such as sediment and rust is generated. Quartz sand filters can filter the circulating cooling water, intercept large-particle impurities in the water, prevent the cooling water pipelines from scaling and clogging, improve the cooling efficiency, and ensure the normal operation of production equipment. Meanwhile, for the pre-treatment process of some process water with relatively low water quality requirements, it can also play a role in preliminary filtration, removing visible impurities and laying a foundation for subsequent more refined water treatment steps.

l Municipal Water Supply Field: The source water for municipal water supply often contains impurities such as sediment, algae, and microorganisms. Quartz sand filters, as an important equipment in the pre-treatment process, can quickly and effectively remove large suspended solids in the water, reduce the burden on subsequent in-depth treatment processes, improve the processing efficiency of the entire water supply system, ensure the safety and hygiene of residents' water use, enable residents to use clearer and odorless drinking water, and also help to reduce the maintenance cost of the water supply pipeline caused by the deposition of impurities and extend its service life.

l Sewage Treatment Field: In the treatment of domestic sewage and industrial wastewater, quartz sand filters can first conduct preliminary filtration on the sewage, remove large-particle impurities in it, so that the subsequent treatment of sewage, such as biochemical treatment and advanced treatment, can be carried out more smoothly, avoid clogging or interference to subsequent treatment equipment caused by large-particle substances, improve the efficiency of the entire sewage treatment system, and finally achieve the goals of meeting the discharge standards or recycling the sewage, which has a positive significance for the rational utilization of water resources and environmental protection.

l Agricultural Irrigation Field: If agricultural irrigation water contains too many large-particle impurities such as sediment, it is easy to clog the irrigation nozzles, affect the irrigation effect, and even damage crops. Quartz sand filters can filter irrigation water sources such as surface water and groundwater, remove large-particle impurities in them, ensure the cleanliness of the irrigation water, enable the irrigation system to supply water to crops evenly and stably, help to improve the yield and quality of crops, and promote the sustainable development of agriculture.

SUMMARY

Quartz sand filters, with their unique structure, reliable working principle, and many excellent performance characteristics, have shown indispensable value in multiple important fields such as industry, municipal, sewage treatment, and agricultural irrigation. They are like the solid "guardians" of water quality purification, quietly contributing to ensuring the cleanliness and efficient utilization of water resources, helping to stabilize the development of various industries and improve people's living quality. With the continuous progress of science and technology, it is believed that quartz sand filters will continue to make breakthroughs in aspects such as improving filtration precision, optimizing cooperation with other processes, and expanding applications, further meeting the increasingly diverse water treatment needs of society and becoming one of the key supporting equipment for creating a high-quality water environment and promoting sustainable development.