How to choose the right swimming pool sand filter
Swimming, as a sport for all ages, has become a popular sport. Swimming is naturally inseparable from water. However, due to the global shortage of water resources, if the water in the swimming pool cannot be recycled, it will cause huge waste. In order to better save water resources, swimming pools have established independent water circulation systems, and in this water circulation system, sewage filtration has become an essential and important link. Pool sand filters tank have begun to come into our sight, and have become an important tool for major swimming pools to realize the recycling of water resources.
The swimming pool sand filter is mainly used to fill the filter material. The pool water used in the swimming pool is passed through the filter sand tank to retain some impurities in the swimming pool water. This link is a key part of the swimming pool filtration, which directly affects the water quality of the swimming pool. At present, the appearance styles of the swimming pool sand filter can be divided into: vertical top-out pool sand filter, vertical side-out pool sand filter, horizontal pool sand filter, high-efficiency deep pool sand filter, etc. According to the material, it can be divided into: glass fiber pool sand filter, polyethylene pool sand filter, anti-ultraviolet plastic pool sand filter, resin pool sand filter, stainless steel pool sand filter. Each type of pool sand filter will be selected according to the conditions of the swimming pool machine room, the water temperature, and the customer's own conditions. And Fenlin's vertical top-out pool sand filter, vertical side-mount pool sand filter, and glass fiber pool sand filter are very popular and have been well received by the majority of users.
One of Fenlin's best-selling pool sand filters is that the outer shell is reinforced with fiberglass filament winding. The CNC filament winding machine used enables precise and continuous winding of fiberglass fibers, resulting in an extremely fine-textured, extremely strong filter housing. The design of the micron FRP pool sand filter is based on the principle of "deep filtration". The impurities in the water enter the tiny gaps between the sand particles with the water flow and are intercepted there by the screen. The backwash of the pool sand filter only needs to rotate the handle of the multi-directional valve from the "filter" to the "backwash" position, and the influent water flow can be diverted to the backwash direction to flush the filter bed.
The top cover of the glass fiber pool sand filteris designed by the principle of quick closing, with a top threaded pressure plate, which is convenient to open and close and has a good sealing effect; in addition, the distance from the surface of the filter bed to the water distribution head is increased, so as to improve the efficiency of the filtration stage. Water distribution effect, and avoid sand falling into the water distribution pipe during backwashing. The specially designed holes of this type of pool sand filter make the sand changing process more convenient and efficient. During the filtration process, the filtration of water quality can be observed through the perspective holes designed in this type of sand tank. Commercial sand tanks are suitable for larger venues such as commercial or public swimming pools, water parks, aquariums and water treatment facilities.
How Swimming Pool Sand Filter works:
Pool sand filter is to use special filter sand to eliminate the tiny dirt in the pool. Filter sand, as a medium for removing dirt, is filled in the cavity of the pool sand filter. When the control knob is turned to the "FILTER" position, the pool water containing suspended dirt particles is pressed into the filter pipeline by the pump, and then guided by the control switch to the water outlet of the swimming pool sand filter. The pool water passes through the Swimming pool sand filter, and the tiny dirt is captured and filtered by the sand bed. The filtered clean water is returned to the swimming pool by the control switch at the bottom of the pool sand filter and then by the pipeline. This whole program is continuous and automatic and provides a complete cycle for the pool sand filter and piping system.
Swimming pool sand filter After a period of use, the accumulated dirt obstructs the water flow and weakens it. At this time, it is necessary to clean the pool sand filter. Turn the control switch to the "BACKWASH" position, then the water flow becomes the opposite direction, the water flow directly reaches the bottom of the pool sand filter cavity, and then recoils up through the sand layer, flushing the previously captured dirt and residue. It is discharged from the sewage outlet. After each backwash, the control switch should be turned to the "RINSE" position, the water pump should be turned on for 0.5 to 1 minute, then turned off, and then turned to the "FILTER" position to restart normal filtration.
A certain scale of quartz sand is generally placed in the swimming pool sand filter. The size of the quartz sand is different within a certain range. In the pool sand filter, the quartz sand is arranged from top to bottom and from small to large. During normal filtration, the water It enters from the upper layer of sand and comes out from the lower layer. When the water flows through the filter layer from the top, some of the suspended solids in the water enter the upper filter media and form tiny holes, which are trapped by the surface layer of the filter media by adsorption and mechanical retention. The overlapping and bridging effect occurs again, as if a layer of film is formed on the surface of the filter layer, which continues to filter the suspended substances in the water, which is the so-called film filtration of the surface layer of the filter material. This filtration effect is not only on the surface of the filter layer, but also has this interception effect when water enters the intermediate filter layer. In order to distinguish it from the filtration of the surface layer, this effect is called osmotic filtration. In addition, because the sand particles are closely arranged with each other, when the suspended matter particles in the water flow through the tortuous channels in the sand layer, there will be more opportunities and time to collide and contact the surface of the filter material. The suspended solids in the sand layer bond with the flocs on the particle surface of the sand layer, and the contact coagulation process occurs. To sum up, the filtration of pool sand filte is to further purify water through membrane filtration, osmotic filtration and contact filtration processes.
Daily maintenance of Swimming Pool Sand Filter cannot be sloppy
1. The swimming pool sand filter should be used normally, and the circulation system should be used normally. Some swimming pools do not pay much attention to this, and the circulation system is left idle there as a display, and it will not be turned on once every six months or a year. This is not only irresponsible for water quality, but also detrimental to the circulatory system. If it is left idle for too long, it will cause problems with various components.
2. Regular inspection, that is, regularly check whether the lower circulation system can be used normally, whether there is water leakage, sand leakage or other problems, whether the components are aging and faulty, and if there is any, it should be repaired in time.
3. Regular cleaning, the filter system has been used for a long time, and a lot of impurities, grease and other dirt will accumulate in the sand filter and pipeline. If these things accumulate and get stuck inside, it will affect the filtering effect of the system and even make the water quality worse. Therefore, in addition to regular regular backwashing, decontamination cleaning should be carried out every six months or a year. These stubborn stains should be cleaned with professional cleaners and professional methods. Use sand filter cleaning agent for the pool sand filter, fill the pool sand filter with water, pour it into the pool sand filter cleaning agent and soak it for about 24 hours, and then backwash it.
4. Regular replacement of quartz sand, quartz pool sand filtration is the most important step in water purification. Quartz sand is very important. These sands have a relatively long lifespan and can last several years with normal maintenance. However, quartz sand generally needs to be replaced at least once every 3 years. Due to long-term work, the ability of sand to absorb dust will be weakened, and the large amount of oil and impurities will lead to large-scale agglomeration of sand, and the filtering effect will be reduced or even lost. Therefore, quartz sand must be replaced every 3 years.
