Shallow Sand Filter

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DCG industry company

Xinxiang city, China

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Shallow sand filter
A shallow sand filter is composed of one or more standard high-speed sand cylinder units, with a unique water distributor and collector, with a unique automatic washing valve, which can realize the normal system operation of multiple standard high-speed sand cylinders one by one backwashing, and automatic program control. It has the advantages of small backwash water consumption, convenient installation, and easy operation. The flow of the equipment is large, with no maintenance; According to different user requirements, there are vertical and horizontal two series, suitable for water treatment needs in many fields.
Filter medium
water-suspended matter, particulate matter, water fouling, bacteria and algae, rust, etc.
Shallow sand filter
A shallow sand filter is a sand cylinder unit consisting of one or more standards, it has unique water distribution and collection of water, has a unique automatic flush valve, which can realize multiple standards high in normal system operation sand cylinder one by one single back flush, automatic process control. Has the backwash water consumption small, convenient installation, easy operation, etc; The equipment is large flow, no maintenance; According to different user requirements, there are vertical and horizontal two series, that is suitable for the water quality in the field of multiple processing requirements.
Equipment performance

The filter unit adopts a single chamber design, which has a better backwashing effect and lower sand running rate.
The water collector can be made of stainless steel / ABS for longer service life.
The water outlet pipe is set at the bottom of the unit, with less water resistance and more convenient maintenance.

Working principle
Filtration status:
Filtering stateShallow sand filter, made up of several filtering unit parallel. When the system is in a state of filter, unfiltered water through their own unique cloth water heater uniform water distribution, water in the state of laminar flows through the filter packing layer (refined grains of quartz sand). When the water flows through the packing layer, impurities are trapped within the packing layer. Having more than one set of uniform distribution of water at the bottom of the filter, to collect and raises the filtered water equably, advection, filter, can make the filter under high velocity, still can achieve a better filtering effect.
Backwashing status:
Backwashing stateside the impurities accumulated continuously in the packing layer, the head loss will continue to increase. When it comes to a value into and out of the water head loss, the system will automatically activate the constant pressure difference devices and make its transformation to the state of backwashing, when the end of the backwashing, change the direction of the water hydraulic valve so as to realize by backwashing, easier to clean the impurities of the build-up. When the system is in a state of backwashing filter still continue, which is the standard for backwashing to the unit, and the cylinder is not filtered, other standards in the system unit sand cylinder is still in the filter. A filtered part of clean water is used to wash the standard unit sand cylinder, the rest is sent to the user. Backwash wastewater by the hydraulic valve of the backwashing drain is expelled. At high speeds, the sand cylinder efficient filtration system between special header design can make the packing filler rub each other and maximize the flushing efficiency, reducing the backwashing water (clean water), at the same time when the backwashing phenomenon did not run. A standard unit sand cylinder backwashing for 3 minutes, reverse wash over, standard unit sand inside the cylinder head loss to the reasonable scope, constant pressure device recovery signals are given to the filter state hydraulic valve, the next standard unit sand cylinder and prepared to enter a state of backwashing, the system can be controlled by control backwashing, the default 4 hours backwashing time, adjust the time, the dual system according to the working condition of the scene Control of both primary and secondary, which first come first serve basis.

Application scope:
Electric power, reverse osmosis pre-grade, petrochemical, fine chemical, food and beverage, agricultural irrigation, automobile, industry, metallurgy, papermaking, medicine, microelectronics, environmental protection water treatment, and other industries.

Equipment advantages
Units from 24 inches (500 mm) to 96 inches (2400 mm), a variety of specifications, can have different ways of installation. The filter can be used as an independent system, in the use of the existing process for the water pump, if it is as a filter, also can be equipped with its own pump alone. Filters can also be multiple processing units installed in public so that we can implement this system filtering capability. Backwashing filter system manual, semi-automatic, and fully automatic three ways, respectively by manual button, PLC, pressure difference, or management system to start. The backwashing cycle and the backwashing time length are adjustable, and factory set for 3 minutes. The control by PLC to realize an automatic filtering control system.
1. high filtering speed, low-pressure loss, completely solve ordinary mechanical medium filter speed is slow, small flow problem.
2. modular setting, cover an area of an area small, piping, less capital investment. Covers an area of reduced by more than 40%, piping quantity reduce more than 50%.
3. Manual, semi-automatic, and automatic backwashing is optional and fully satisfies your needs.
4. optional backwashing water system, water tower, or exogenous water sources, and can automatically switch (special requirements).
5. a combination of multiple cells can be processing flow can be arbitrary expansion.
6. Shell and pipe made of carbon steel Q235B, also can use stainless steel material.
7. the core parts adopted are imported (BERMAD, BACCARA, SIEMEN, MITSUBISHI).
8. filtration unit adopts the single cavity design, backwashing better run sand rate is lower.
9. Siamese optional stainless steel/ABS material, long life.
10. outlet pipe set in the bottom of the unit, water resistance, smaller, more convenient maintenance.

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