Quartz sand filter installation debugging

A, quartz sand filtering profile

quartz sand filter, also known as mechanical filter, overall made of 304 stainless steel or carbon steel stainless steel 304 wire tube, small resistance, large flux, fill in high quality quartz sand. Mainly through the filter material of sediment, colloid, metal ions and organic matter to intercept, adsorption. Often used to purify water treatment and wastewater treatment, because of its no pollution, low prices, low running cost, so more widely, and reverse flushing discharge for a few minutes to be used for the first time in the sewage net can be normal use.

filtration velocity, V = 5 ~ 12 m/hVmax = 15 m/h.

working temperature: 5 ~ 40 ℃

working pressure: 0. 3 - - 0. 4MPa。 ( 30 - water head 40 meters)

2, quartz sand filter filling filter material note

1, determine the azimuth of the quartz sand filter, filter requirements placed smooth, place the filter platform for weighing 5 tons, then open the DN400 manhole, check if there is any foreign body inside the tube and the stainless steel wire cloth is loose. （ Refer to below pipe valves, and the pipe bracket on the ontology to determine the azimuth of the filter, filter material in before, make sure to bearing, installs was difficult to move the filter or filter material)

2, to the vats filled with quartz sand, the formation of filter layer from top to bottom, sand particle size from small to large.

3, close the manhole cover, tighten the screws on manhole covers.

3, quartz sand filter instructions ( As shown in figure connected ontology pipeline valves)

4, quartz sand filter debug instructions

1, backwashing; Steps: open the valve, valve and exhaust valve c b f, close the other valve, open the water pump. Backwashing, when the exhaust valve f water, close the discharge valve f, backwashing time will be subject to discharge water clean.

2, is wash steps: d first open the valve, close the valve b, open the valve 'a', close the valve c ( Pay attention to close the order, because the water pump is open, must ensure that water is a pathway, otherwise, the pipe is easy to crack leakage) , are washing time will be subject to clean water.

3, operation steps: e open the valve, close the valve d.

note: 1, start debugging, backwashing time to long point, because new materials have powder, quartz sand and so will be subject to backwashing water clean, debugging backwashing time in 10 minutes or so commonly, is washing time in about 3 minutes. （ The water is clean shall prevail)

2, debugging after daily operation, is washed and backwashing operation steps as above, such as backwashing and are washing to reduce the flow shows the filter is blocked for backwashing and washing, operation how long time for backwashing and positive wash need to see the water quality situation, if the water quality is better, such as tap water, can run 2 - 4 days, if the water quality is poorer run 1 day or less requires backwashing and wash ( So often at the start of the observation of the water pressure gauge is poor, if have zero pressure difference. 9 kg will backwashing) 。 Average daily backwashing time set in 5 minutes, wash time is 3 minutes.

note: water pump or the pump before opening work, be sure to keep pipeline usually, to prevent the pump work, and the water pump pipe after a closing valves, which are water pump to burn out or pipe burst. Five, daily maintenance

1, when the water yield decrease or increase in and out of the water pressure difference, want to undertake to the sand filter backwashing, are washing operation, the running time should pay attention to observe the change in the flow of water or change of the differential pressure gauge, better in a timely manner, backwashing is washing operation. （ This also depends on the specific operation time and water and cleaning frequency oneself adjust according to the requirements of your company) 。

2, quartz sand, generally 2 - Replaced every three years, can also according to the actual situation change the extension of the replacement cycle.