Because the cooling circulating water system is an open system, dust, impurities in the air and scale in the pipes will enter the water to deteriorate the water quality; more impurities will easily block the copper pipes of the heat exchanger, reducing the heat transfer rate and affecting the entire system. cooling system effect. Therefore, shallow sand filters and bag filters housing are used.
1. Project overview
Total treated water volume: 450m³/h
Filter medium: cooling circulating water
Function: filter out impurities in water
Influent turbidity: 20-30mg/L
Turbidity of effluent: <5mg/L
Filtration accuracy: 5μm
This set of equipment consists of 4 shallow sand filters connected in parallel and 3 bag filters.
shallow sand filter
2. Technological process
The shallow sand filter is installed before the bag filter, and the cooling circulating water first passes through the shallow sand filter, flows into the water distribution system from the inlet of the filter tank, and evenly reaches the filter material layer. Suspended solids in the water are intercepted by the surface of the filter layer due to adsorption and mechanical resistance; when water flows into the middle of the filter layer, because the sand particles in the filter layer are arranged more closely, the particles in the water have more opportunities to collide with the sand particles, so The flocs, suspended solids and sand particles in the water adhere to each other, and the impurities in the water are trapped in the filter material layer, so as to obtain clear water quality with a turbidity of less than 5mg/L.
shallow sand filter
The water filtered from the shallow sand filter passes through the bag filter again, and the water flows into the filter bag from the side inlet pipe of the filter shell, and the bag filter removes impurities that are invisible to the naked eye and have a precision greater than 5 microns Filter it out, thereby obtaining clarified water quality and ensuring the normal use of subsequent equipment.
bag filter
3. Equipment Features
1. On-demand customization, good filtering effect
This set of combined equipment is customized according to the customer's on-site working conditions. It uses 4 shallow sand filters connected in parallel and 3 bag filters together to perform two processes of filtration. The filtration accuracy is high and the filtration The effect is good.
bag filter
2. Intelligent operation reduces the difficulty of operation
The shallow sand filter is intelligently controlled by PLC, and the pressure difference is used for backwashing. During backwashing, the water supply is uninterrupted, and the operation difficulty is reduced.
shallow sand filter
3. Low operating cost
The long-term operation cost of this set of equipment is low, saving electricity, water and maintenance costs.
Other product links
Duplex filter
Backwash filters
Membrane element
