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The shallow sand filter is a special equipment used to reduce the turbidity of water and improve water quality. This type of equipment is widely used in various industries such as factory circulating cooling water, agricultural irrigation water, municipal water supply and drainage, etc.
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BTSL
BEITE
Shallow sand filters are composed of one or more standard high-speed filtration units. Water with high turbidity flows through internal water distributors and collectors, and under a certain pressure, through a certain thickness of natural sea sand, effectively intercepts and removes suspended solids, organic matter, colloidal particles, microorganisms, chlorine, odors, and some heavy metal ions in the water, ultimately achieving the effect of reducing water turbidity and purifying water quality. This is an efficient filtration equipment.
Technical Parameter
Filtering Method: Sand and Gravel Filtration Interception
Cleaning Method: Backwashing and Sewage Discharge
Control Mode: Manual Control/Automatic Control (Pressure Difference Control, Time Control)
Control System: PLC Touch Screen Intelligent Control System (Automatic Control)
Housing Material: Carbon Steel, 304 Stainless Steel, 316 Stainless Steel
Water Inlet Pressure: ≥0.2Mpa, <0.6Mpa
Structural Form: single-tank, two-tank, three-tank, four-tank, five-tank and other parallel structures to meet different flow requirements under different working conditions
Tank Diameter: ∅600-∅3200
Outlet Water Quality: Inlet Turbidity ss<15-30mg/L, Outlet Turbidity ss<5mg/L
Filtration Speed: 30m/h
Filter Material: Natural Sea Sand
Working Principle
Filter Status
When the system is in the filtering state, unfiltered water is evenly distributed through the water distributor, and the water passes through the packing layer in 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 lead the filtered water evenly. Advection filtration allows the filter to filter at high flow rates and still achieve better filtration effects.
Backwash Status
As impurities continue to accumulate in the packing layer, the internal pressure head loss will continue to increase. When the inlet and outlet water pressure head loss reaches the set value, the system will automatically activate the constant pressure device to switch to the backwash state. When the backwash of the filter tank is completed, the hydraulic valve changes the water supply direction to achieve backwash one by one. Easier to clean accumulated impurities.
When the system enters the backwashing state, the on-off position of the three-way valve of the tank being backwashed is changed through PLC control (the inlet is closed, the sewage outlet is opened), and the other tanks are in a normal state, and water can only flow into the other tanks for filtration. , a part of the filtered water flows backward from the water outlet into the filtered tank. Driven by hydraulic power, the natural sea sand and impurities wash each other, and the impurities are taken away by the water through the valve drain outlet. At this time, the water distribution The device intercepts the filter material.
After the first tank is cleaned, it works normally and starts cleaning the second tank. It repeats again until the last tank is cleaned, at which time the backwashing work ends.
Advantages
1. The core components are imported or domestic brands.
2. The filtering part adopts a single-chamber design, which has better backwashing effect and lower sand runoff rate.
3. The water collector can be made of stainless steel/ABS and has a longer life.
4. The water outlet pipe is set at the bottom of the unit, with smaller water resistance and easier maintenance.
Features
1. Small size, easy to install and save space. It can be installed outdoors without building a house, saving civil construction costs. It occupies a small area, can be installed indoors and outdoors. It has strong adaptability and can also be installed in layers. ; It has a compact structure and saves space.
2. The equipment has good anti-corrosion performance and long service life. The filter shell is made of stainless steel, steel-lined rubber or full plastic, and has a high pressure-to-weight ratio and corrosion resistance.
3. The filtered water volume is large, the filtration effect is good, and the filtration flow rate is fast.
4. Automatic backwashing: The backwashing of the equipment is automatically recognized and controlled by the intelligent control system without manual intervention. Even if the suspended solids in the water fluctuate, the equipment can automatically adapt.
5. The water supply is uninterrupted; when the equipment is backwashed, the filtration process is carried out at the same time, and the system supplies water as usual.
6. Adopt a unique distribution and water collection device. Since the water distribution system of this filtration system is very evenly distributed in the water collector, the water flow flows in a laminar manner during the entire filtration process, and the plane of the filter sand bed is always flat during the filtration process. The effluent water quality is stable.
7. Use refined and selected natural sea sand as the filter medium, and select it according to the water quality.
8. Low long-term operating costs, saving electricity, water and maintenance costs.
Power saving: The system has a unique automatic backwash valve. The sand filter tanks are not backwashed at the same time, but are backwashed one by one under normal operation of the system. There is no need to consider setting up a backwash pump. At the same time, compared with other sand filtering equipment, the required filter pump lift is 6-7m lower.
Water saving: Due to its unique water replenisher and water collector, the system has a unified tank size, so that no compressed air is needed during backwashing, so that the medium layer can expand very evenly for effective backwashing. The water used for backwashing is filtered clean water, so the amount of backwash 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 unique multi-function valve to control the backwash of the system. Because the unique multi-function valve has no wear and long life, there is no record of damage within 10 years, and the management cost is low.
Application Areas
1. Industrial water filtration---there are certain system requirements for water quality. For example: filtration of oxygen lance water, boiler, heat exchanger water supply in steel plants, etc., can filter out impurities in the water and avoid clogging of pipelines and nozzles.
2. Filtration system for industrial circulating water.
3. Raw water treatment---it can filter surface river water, lake water, sea water, reservoir water, well water, and urban tap water as water sources for urban community quality water supply, and remove sand, suspended matter, algae, organic matter, etc. in the water.
4. Agricultural Iirrigation---especially suitable for water sources with high flow and good impurity content, such as farmland irrigation, irrigation of lawns in parks and golf courses, etc.
5. Water for food processing industry, paper industry, industrial circulating water treatment in power plants, etc., pretreatment of pure water for industrial and medical use. Industrial production water recycling, industrial wastewater treatment.
6. Aquaculture, swimming pool and water parks.
Installation
Single Row Installation
Double Row Parallel Installation
Shallow sand filters are composed of one or more standard high-speed filtration units. Water with high turbidity flows through internal water distributors and collectors, and under a certain pressure, through a certain thickness of natural sea sand, effectively intercepts and removes suspended solids, organic matter, colloidal particles, microorganisms, chlorine, odors, and some heavy metal ions in the water, ultimately achieving the effect of reducing water turbidity and purifying water quality. This is an efficient filtration equipment.
Technical Parameter
Filtering Method: Sand and Gravel Filtration Interception
Cleaning Method: Backwashing and Sewage Discharge
Control Mode: Manual Control/Automatic Control (Pressure Difference Control, Time Control)
Control System: PLC Touch Screen Intelligent Control System (Automatic Control)
Housing Material: Carbon Steel, 304 Stainless Steel, 316 Stainless Steel
Water Inlet Pressure: ≥0.2Mpa, <0.6Mpa
Structural Form: single-tank, two-tank, three-tank, four-tank, five-tank and other parallel structures to meet different flow requirements under different working conditions
Tank Diameter: ∅600-∅3200
Outlet Water Quality: Inlet Turbidity ss<15-30mg/L, Outlet Turbidity ss<5mg/L
Filtration Speed: 30m/h
Filter Material: Natural Sea Sand
Working Principle
Filter Status
When the system is in the filtering state, unfiltered water is evenly distributed through the water distributor, and the water passes through the packing layer in 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 lead the filtered water evenly. Advection filtration allows the filter to filter at high flow rates and still achieve better filtration effects.
Backwash Status
As impurities continue to accumulate in the packing layer, the internal pressure head loss will continue to increase. When the inlet and outlet water pressure head loss reaches the set value, the system will automatically activate the constant pressure device to switch to the backwash state. When the backwash of the filter tank is completed, the hydraulic valve changes the water supply direction to achieve backwash one by one. Easier to clean accumulated impurities.
When the system enters the backwashing state, the on-off position of the three-way valve of the tank being backwashed is changed through PLC control (the inlet is closed, the sewage outlet is opened), and the other tanks are in a normal state, and water can only flow into the other tanks for filtration. , a part of the filtered water flows backward from the water outlet into the filtered tank. Driven by hydraulic power, the natural sea sand and impurities wash each other, and the impurities are taken away by the water through the valve drain outlet. At this time, the water distribution The device intercepts the filter material.
After the first tank is cleaned, it works normally and starts cleaning the second tank. It repeats again until the last tank is cleaned, at which time the backwashing work ends.
Advantages
1. The core components are imported or domestic brands.
2. The filtering part adopts a single-chamber design, which has better backwashing effect and lower sand runoff rate.
3. The water collector can be made of stainless steel/ABS and has a longer life.
4. The water outlet pipe is set at the bottom of the unit, with smaller water resistance and easier maintenance.
Features
1. Small size, easy to install and save space. It can be installed outdoors without building a house, saving civil construction costs. It occupies a small area, can be installed indoors and outdoors. It has strong adaptability and can also be installed in layers. ; It has a compact structure and saves space.
2. The equipment has good anti-corrosion performance and long service life. The filter shell is made of stainless steel, steel-lined rubber or full plastic, and has a high pressure-to-weight ratio and corrosion resistance.
3. The filtered water volume is large, the filtration effect is good, and the filtration flow rate is fast.
4. Automatic backwashing: The backwashing of the equipment is automatically recognized and controlled by the intelligent control system without manual intervention. Even if the suspended solids in the water fluctuate, the equipment can automatically adapt.
5. The water supply is uninterrupted; when the equipment is backwashed, the filtration process is carried out at the same time, and the system supplies water as usual.
6. Adopt a unique distribution and water collection device. Since the water distribution system of this filtration system is very evenly distributed in the water collector, the water flow flows in a laminar manner during the entire filtration process, and the plane of the filter sand bed is always flat during the filtration process. The effluent water quality is stable.
7. Use refined and selected natural sea sand as the filter medium, and select it according to the water quality.
8. Low long-term operating costs, saving electricity, water and maintenance costs.
Power saving: The system has a unique automatic backwash valve. The sand filter tanks are not backwashed at the same time, but are backwashed one by one under normal operation of the system. There is no need to consider setting up a backwash pump. At the same time, compared with other sand filtering equipment, the required filter pump lift is 6-7m lower.
Water saving: Due to its unique water replenisher and water collector, the system has a unified tank size, so that no compressed air is needed during backwashing, so that the medium layer can expand very evenly for effective backwashing. The water used for backwashing is filtered clean water, so the amount of backwash 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 unique multi-function valve to control the backwash of the system. Because the unique multi-function valve has no wear and long life, there is no record of damage within 10 years, and the management cost is low.
Application Areas
1. Industrial water filtration---there are certain system requirements for water quality. For example: filtration of oxygen lance water, boiler, heat exchanger water supply in steel plants, etc., can filter out impurities in the water and avoid clogging of pipelines and nozzles.
2. Filtration system for industrial circulating water.
3. Raw water treatment---it can filter surface river water, lake water, sea water, reservoir water, well water, and urban tap water as water sources for urban community quality water supply, and remove sand, suspended matter, algae, organic matter, etc. in the water.
4. Agricultural Iirrigation---especially suitable for water sources with high flow and good impurity content, such as farmland irrigation, irrigation of lawns in parks and golf courses, etc.
5. Water for food processing industry, paper industry, industrial circulating water treatment in power plants, etc., pretreatment of pure water for industrial and medical use. Industrial production water recycling, industrial wastewater treatment.
6. Aquaculture, swimming pool and water parks.
Installation
Single Row Installation
Double Row Parallel Installation
