Qinhuangdao Shi Ji Yuan Water Treatment Technology Co., Ltd—

Advanced feature compared with conventional sand filtration technique
Because of its simple technical process, the conventional multi-media filtration is still applied widely in the water filtration field with widely known disadvantages.
Firstly, the quality of output water is unstable since the cleaning is performed completely depending on the manual operation, and the cleaning is not timely or the pollutants can penetrate through the filtering layer because of the negligence of the operation process.
Secondly, the cleaning is not thorough. The media filter can eliminate the impurity mainly depending on the adsorption of the millipore on the surface of the filtration material and the mechanical retention between the particles of the filtration material, and because the limitation of the technical condition and the operating level, the cleaning function can only eliminate the partial impurities in the filtering bed, hence the microspore on the surface of the filtration material can be blocked gradually by the impurity, then the hardening is formed, and the absorption and the filtering effect are influenced seriously.
Thirdly, the running cost is high. The cleaning of the media filter can generate an amount of waste water discharged to the environment; simultaneously, an amount of power consumption can be caused, and the waste of the resource and energy is caused virtually.
Fourthly, the degree of automation is low. The manual operation can not only increase the labor intensity, but the difficulty can be brought to the control of the operating index.
Fifthly, the occupying area is large, the shape is heavy, and both the installation and the movement are inconvenient.

	Double intelligent pressure differential filter	Conventional sand filter or sand-bed filter
Filter medium	316L stainless steel sintered mesh，permanently used	quartz sand， periodically replaced or supplemented
Filter fineness	Maximum 2Micron	Optimal dozens of micron under the condition of no flocculating agent
The quality of outlet water	Stable，no impurities penetration ocuurs,no biological contamination is added	Unstable, impurities may penetrate filter screen to enter product water at the initial stage of cleaning operation or in the case of failure in cleaning in a timely manner; moreover, filtering bed facilitates the propagation of microorganism to increase the content of microorganism in product water
Flow speed	No restrictions	There are restrictions, generally the filtering speed is 8～10m/h, if filtering speed is too high, the effectiveness of filtering will be affected, even more it will result in incapacity of filtering.
Filtering mode	Direct filtering, it can ensue the filter fineness, all impurities with size being larger than filter mesh size can be intercepted	Indirect filtering; filtering is effected through millipores on the surface of filter materials and clearance between filter materials; pores and clearance is irregular, fineness can’t be guaranteed, which will easily result in current bias and lead to penetration of impurities through filter screen
Water treatment volum	Large	It is subject to filtering speed, small
Backwash	Automatically detect water pressure based on the situation of filth and blocking in filter screen to achieve automatic backwash which is slightly affected by the fluctuation of water quality and will not result in interruption of normal water production	Mostly manual cleaning; normal water production will be interrupted during cleaning, even some filters can make automatic cleaning but conduct cleaning on the basis of time or water quantity rather than the situation of filth and blocking; more water and electricity may be consumed during non-cleaning period; in the event of high fluctuation of water quality and delay in cleaning, the quality of water produced may worsen
Time for cleaning	55s	Generally 20min～ 1 h
Water consumption for cleaning	Low，consuming only 40～60L water for cleaning for one time	High，the quantity for backwash is two times those under normal operation
Degree of automation	High, remote control	Low, no automatic detection and response capacity
Floor area	Small	It is subject to filtering speed, large
Expansion and reconstruction	Easy, flexible installation and movement; technical renovation can be made on the basis of original state	Difficult, for expansion, space should be reserved in the initial stage of design; generally it can’t be moved after use and also it is difficult to make technical renovations.
Cost of investment	Unit investment cost decreases with increasing water treatment volume	Unit investment cost increases with increasing water treatment volume
Operating cost	Low; covering only cost for low electricity and water consumption for cleaning	High; cost for large water and electricity consumption during cleaning and labor cost for routine maintenance and management

Serving as the substitute product for conventional filtering, double intelligent pressure differential filter has the following advantages in terms of performance, as indicated in table below:

	Shi Ji Yuan brand double intelligent pressure differential filter	Mechanical filter	ultrafilter	Other different pressure filter products
Maximum filter fineness	2 Micron, stable	Optimal several micron but unstable	1～5 Micron	100 Micron
Filter medium	316L stainless steel sintered mesh, high strength	Quartz sand and anthracitic coal etc, particles are vulnerable to shattering and agglomeration	PP molten sprinkling filter elementFiber is vulnerable to shedding	Single-layer meshing or welded mesh dominated by mesh grid or wedge-shaped mesh, low strength, vulnerable to deformation
Service life of medium	Permanently used, replacement not required	Periodically supplemented or replaced	One-off service	Short time
Backwash function	Automatic high pressure backwash	Generally manual backwash	No	No backwash ; only self-suction cleaning, not radically clean, periodically take out filter screen to make off-line cleaning
Water consumption for cleaning	0.001～0.002% of water quantity produced under normal condition	Two tines water quantity produced under normal condition	————	Water consumption for self-suction discharge is 0.1% of water quantity produced under normal condition
Floor area	Small	Large	General	Relatively small
Operating cost	Low	General	High	Relatively low