Editor's note: The filter is an indispensable device on the pipeline of the conveying medium. It is usually installed at the inlet end of the pressure reducing valve, pressure relief valve, fixed water level valve or other equipment. It is used to eliminate impurities in the medium to protect the valve and Normal use of equipment. This article mainly introduces the replacement steps and precautions of quartz sand and activated carbon for filters.
Quartz sand, activated carbon filter material replacement steps:
1. Tools required to replace quartz sand and activated carbon: pipe wrench, sand suction tube, raw tape.
2. Before replacing the quartz sand and activated carbon, you must conduct a comprehensive inspection of the equipment to see if the customer's equipment has any damaged parts that are not found. If any, you should promptly explain to the customer and record each operating parameter, especially quartz sand, Water pressure of Qingxin activated carbon.
3. The shutdown of the equipment, first of all, if there is reverse osmosis, first stop the main pump of the reverse osmosis, then stop the original water pump, and then turn off the water inlet of the original water pump.
4. Prepare for disassembly. For larger sand carbon canisters, such as 2472, use pipe wrench to open the core, and smaller equipment, such as 1354, can be opened directly by hand. Use the sand suction tank to suck out the sand carbon in the tank. The sand suction carbon utilizes the siphon phenomenon, and pay attention to exhaust the air in the suction pipe.
5. When changing the sand carbon, it is generally to change the carbon first before changing the sand, because the activated carbon that has just been loaded must be soaked with water to make it fully wet, to eliminate the air between the carbon particles and the internal voids, so that the carbon particles do not float on the water , Also to save time. First put a small amount of water in the bottom of the carbon canister, then fill the activated carbon.
6. The filling volume of activated carbon is about 70% of the total volume of the carbon canister. In order to leave enough room for reflection. After filling the carbon, fill the canister with water so that the water can completely soak the activated carbon.
7. Before changing the quartz sand, a small amount of water should be injected into the sand tank. Fill the quartz sand in the order of big sand below and small sand above. The filling volume of quartz sand is about 70% of the sand jar.
8. After the quartz sand is filled, reinstall the equipment. The quartz sand can be washed. Before washing, make sure that the valve is opened correctly, that is, the inlet valve and the upper discharge valve, and close the inlet valve of the activated carbon. Then turn on the original water pump, wash it first, and then wash it back. Then wash in reverse. Until the water from the waste valve is clarified.
9. Make sure that the quartz sand has been washed, turn on the original water pump to clean the activated carbon, wash it first and then backwash it, and wash it until the effluent is transparent and colorless, and no fine particles can be put into use. Turn off the water inlet of the softener when cleaning activated carbon.
Precautions
1. Before replacing the sand carbon, completely cover the electrical components close to the sand tank and the carbon tank without the pump with water-impermeable things such as plastic to prevent the water from entering the pump and causing the pump to burn out.
2. When filling sand carbon, the central pipe should be sealed with raw tape to prevent sand carbon from entering the middle pipe.
3. When cleaning the sand carbon, it must be washed first and then backwashed. When backwashing, pay attention to the pressure gauge. If the pressure exceeds 3kg during backwashing, it should be immediately washed.
4. The filling volume of sand carbon should not exceed 70% of the total volume, so that there is space for backwashing.
5. It is generally necessary to turn on the original pump without cleaning, the pressure of the tap water is not enough to clean it, unless the original water pressure is very high.
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