Features:
1. High filtration precision: the removal rate of suspended solids in water can reach more than 95%, and it has certain removal effect on macromolecular organic matter, virus, bacteria, colloid, iron and other impurities. After good coagulation treatment of treated water, When the inlet water is 10 NTU, the effluent is below 1 NTU;
2, the filtration speed is fast: generally 40m / h, up to 60m / h, more than 3 times the ordinary sand filter;
3, large amount of dirt: generally 15 ~ 35kg / m3, more than 4 times the ordinary sand filter;
4. The water consumption rate of backwashing is low: the water consumption of backwashing is less than 1~2% of the periodic water filtering amount;
5, low dosage, low operating costs: due to the structure of the filter bed and the characteristics of the filter itself, the flocculant dosage is 1/2 to 1/3 of the conventional technology. The increase in cycle water production and the operating cost of tons of water will also decrease;
6, small footprint: the same amount of water, the area is less than 1/3 of the ordinary sand filter;
7, adjustable. Parameters such as filtration accuracy, interception capacity, and filtration resistance can be adjusted as needed;
8. The filter material is durable and has a life span of more than 20 years.
Use range:
1. Aquaculture circulating water treatment;
2. Cooling circulating water and industrial circulating water treatment;
3. Treatment of eutrophic water bodies such as rivers, lakes, and family waterscapes;
4, water reuse
5. Precision electronic instrument factory;
Service life:
For a clean room in operation, the value of the end-height filter is not high, and the total may not be as much as the user's output for several hours, but the risk and overhead of replacing the end-height filter will be high. When the filter is replaced, the production should be stopped. The loss of production can only be calculated by the owner himself. This loss is definitely higher than the cost of spare parts for the filter. Replacing a high-efficiency filter is very careful, and anything in the clean room can be expensive, and the damage to a component can be higher than the cost of the entire filter. After the filter is replaced, it must be tested by a professional. Sometimes the air conditioning system needs to be commissioned, and it will take a period of trial operation. Inspection, commissioning, commissioning, three costs added together, may be comparable to the filter price. Smart owners always want to extend the life of high-efficiency filters as much as possible, not to save the filter a few dollars, they want to avoid a lot of trouble caused by replacing the filter.
The most fundamental way to extend the life of a high-efficiency filter is to keep the dust out of the pre-filter. The replacement of the pre-filter generally does not require production downtime and no commissioning, so experienced owners will pay attention and money on the pre-filter and protection-grade intermediate filters. For 10K and 100K cleanrooms, the pre-filtration uses G4 and the intermediate-grade F8 filter (95% colorimetric method), so that the end-use high-efficiency filter can last up to 5 years. In foreign projects and new domestic projects, the F8 filter is the most common pre-filter for non-uniform flow clean rooms.
In some cases, the requirement for high-efficiency filter life is not due to resistance considerations but to other factors. If there is hydrofluoric acid in the plant, and the workshop air conditioner is not a fresh air system, the glass fiber filter paper in the high efficiency filter will be corroded by the return air. For safety, the high efficiency filter must be replaced regularly. Some large pharmaceutical plants need to replace high-efficiency filters after the rainy season every year in order to prevent any possible mold contamination on the filter. Some biological laboratories and laboratories dealing with dangerous goods require a new high-efficiency filter to be reliable in order to carry out a new important issue.
The primary filter is usually replaced once every 2-3 months and replaced every six months, so the life of the high-efficiency filter can generally be more than 2 years;
However, in order to protect the high-grade filter of the latter stage and ensure the safe operation of the clean room, many smart owners change the initial effect every month, and replace the intermediate effect and the sub-efficiency every 3 months (or the end of the wind cabinet is efficient.) Protect the filter), which can guarantee the service life of the high-efficiency filter for 5 years (or even 10 years), and because the resistance of the new filter after replacement is small, the air-conditioning load is greatly reduced, and the cost of filter replacement is much less than that of the air-conditioning operation. The electricity bill required, frequent replacement of the pre-stage pre-filter is actually to operate the air conditioner under low-resistance load, saving a lot of electricity costs;