Xinjiang sand and gravel filter

Xinjiang sand and gravel filterIntroduction:

The filtering medium of the sand and gravel filter is quartz sand filter material. When the circulating water passes through the quartz sand filter material, impurities in the water are intercepted, thereby achieving the purpose of filtration and purification of the effluent.Our company has developed a new generation of fully automatic sand and gravel filtration system based on years of technical experience and hard work. This product has a compact structure and high degree of automation. Its unique structure can reduce the turbidity of the effluent to below 0.5 NTU, and the impurity filtration accuracy can reach 5 microns. This device can automatically backwash and has a low operating cost.The system is composed of multiple speed sand cylinder units, which are equipped with independent water distributors and collectors, and have independent bidirectional automatic flushing valves. It can achieve individual backwashing of multiple speed sand cylinders during normal system operation, with fully automatic program control. It has the advantages of low backwash water consumption, convenient equipment installation, and easy operation. This device has high traffic and does not require maintenance. According to different user requirements, there are two series: vertical and horizontal. Suitable for water quality treatment of industrial circulating water and agricultural irrigation systems.

Xinjiang sand and gravel filterProduct Point:

1. Small size, easy installation, and space saving. It can be installed outdoors without the need for building a house, saving construction costs, occupying a small area, and can be installed indoors or outdoors, as well as in layers, with adaptability; Compact structure, space saving, product anti-corrosion performance, and can be installed both indoors and outdoors

2. The equipment has anti-corrosion performance and a long service life.

3. The filtration volume is large, the filtration effect is good, and the filtration flow rate is fast. The normal filtration rate can be around 40m/h, and it can reach 60m/h depending on the water quality; The filter backwash uses product water and does not have a booster pump or backwash pump; Backwashing takes 2-3 minutes, with a backwash volume of less than 3m3. The filtration accuracy and impurity filtration accuracy can be below 0.10mm, and the effluent turbidity can be less than 0.5NTU. The filtration system consists of unit sand tanks, and the filtration flow rate can be increased from 30.6 cubic meters per hour to 2500 cubic meters per hour.

4. Automatic backwashing: The backwashing of this device is automatically recognized and controlled by an intelligent control system, without the need for manual intervention. Even if there are fluctuations in suspended solids in the water, the device may automatically adapt.

5. Continuous water supply; When the device is backwashed, the filtration process is carried out simultaneously, and the system continues to supply water as usual.

6. Adopting a separate cloth and water collection device, due to the unique water distribution system and evenly distributed water collectors of the filtration system, the water flow is layered throughout the entire filtration process, and the surface of the filter sand bed is always flat during the filtration process, resulting in stable effluent quality.

7. Use refined quartz sand or garnet as the filtering medium, and choose according to the water quality. The filter material can be a homogeneous filter material with a small particle size of 0.16mm

8. Low long-term operating costs, energy-saving, water-saving, and maintenance cost saving. Energy saving: The system has a separate automatic backwash valve, and the backwash of the sand filter tank is not carried out simultaneously. Instead, it takes turns backwashing one by one under normal system operation, without the need to consider setting up a backwash water pump. Compared with other sand filtration equipment, the required head of the filtration water pump is 6-7m lower.

Water saving: Due to its unique water replenishing and collecting device, as well as a standardized tank, the system can achieve even expansion of the medium layer during backwashing without the need for compressed air. The water used for backwashing is filtered clean water, so the amount of backwashing water consumed is small. The backwash water volume of a single tank is only 1m3/min, and the backwash time is 2-3 minutes.

Save maintenance costs: The entire system does not have mechanical or electric valves, and only relies on a single multifunctional valve to control the system's backwashing. Due to its non wear and tear, long lifespan, and no damage records within 10 years, the multifunctional valve has low management costs.

composition

The shallow medium (sand) filter is mainly composed of a stainless steel (304 material) filter cap, filled with quartz sand with a particle size of 2-4 millimeters, and a backwash control device, controller, and tank body. For the installation of 25 cm quartz sand in agricultural tanks and 45 cm quartz sand in industrial tanks.

Backwashing is achieved by an automatic controller, differential pressure sensor, three-way valve, and electromagnetic head.

Working principle:

Positive washing filtration state: When the system is in the filtration state, unfiltered water is evenly distributed through a self-developed water distributor, and the water passes through the packing layer (refined homogeneous quartz sand/garnet) inside the filter in a laminar flow state. When water flows through the packing layer, impurities are trapped within the packing layer. There are multiple evenly distributed water collectors at the bottom of the filter, which collect and extract the filtered water evenly. Horizontal flow filtration allows the filter to filter at the flow rate and still achieve a relatively filtering effect.

Backwash state: As impurities accumulate in the packing layer, the internal head loss will continue to increase. When the pressure head loss of the inlet and outlet reaches the set value, the system will automatically activate the constant pressure device to switch to the backwash state. When this backwash is completed, the hydraulic valve changes the water supply direction to achieve backwashing one by one, making it easier to clean the accumulated impurities.

When the system is in backwash state, filtration continues, and the unit sand cylinder that needs to be backwashed is not filtered, while other unit sand cylinders in the system are still filtering. The filtered clean water is used to backwash the unit sand tank, while the rest is still sent to the user. The backwash wastewater is discharged through the backwash drainage outlet of the hydraulic valve. In the fully automatic filtration system of the sand tank, the special water collector design allows the fillers to rub against each other, maximizing the backwashing effect and reducing the required backwashing water (cleaning water), while there is no material leakage during backwashing. The backwash of a unit sand cylinder lasts for 2 minutes. After the backwash is completed, the internal pressure loss of the unit sand cylinder is reduced to a reasonable range. The constant pressure device gives a recovery signal, and the hydraulic valve returns to the filtering state. The next unit sand cylinder is ready to enter the backwash state.

Technical Specifications:

System working pressure: 0.2-1.0Mpa;

Backwashing requires water pressure:>=0.18Mpa;

Medium temperature:<60 degrees;

PH value: 5-12;

Number of units: 2-n (can be combined arbitrarily according to traffic)

Power supply voltage: AC220V 1A

Control output voltage: DC24V 1A per channel

Pipeline materials: carbon steel, stainless steel, HDPE, etc.

Application scope:

1. The filtration of industrial water has certain system requirements for water quality. For example, the filtration of oxygen lance water, boiler, and heat exchanger water supply in steel plants can filter out impurities in water and avoid blockages in pipeline nozzles.

2. Industrial circulating water filtration system.

3. Raw water treatment - It can filter surface river water, lake water, seawater, reservoir water, well water, and urban tap water as water sources for urban residential areas to remove sand particles, suspended solids, algae, organic matter, etc. from the water.

4. Agricultural irrigation - especially suitable for water sources with flow and impurity content, such as irrigation of farmland, parks, and lawns on golf fields.

5. Water for food processing industry, papermaking industry, treatment of industrial circulating water in power plants, pre-treatment of purified water for industrial and medical use. Recycling of industrial production water and treatment of industrial wastewater.

6. Industries such as aquaculture, swimming, and water parks.