Operation procedure of bag filter
Structure and working principle
Bag filter is a kind of pressure type filter unit, mainly by filter cylinder, cylinder lid, and quick opening mechanism, stainless steel filter bag to strengthen network main parts, such as the filtrate by filter shell side inlet tube into the filter bag, filter bag itself is a device in strengthening a basket with netting on top, liquid penetrant over fineness required for grades of filter bag which can obtain qualified filtrate, impurity particles blocked by the filter bag. It is very convenient to replace the filter bag, and there is basically no material consumption.
Bag filter has many advantages such as reasonable structure, good sealing, strong circulation ability and easy operation. In particular, the filter bag side leakage probability is small, can correctly guarantee the filtration accuracy, and can quickly change the filter bag, so that the operating cost is reduced. The inner and outer surface of the filter adopts mechanical sandblasting polishing solution, which is average and easy to clean.
Bag filter for filtering method is the method of side in side out, side in bottom out, also can take through the pressure in the pipeline to filter the liquid medium pressure into or smoke into the barrel, the bag filter to filter the liquid medium filter blue supporting by electrolytic polishing punching support of filter bag filter, change of solid liquid to liquid medium to be filtered results.
The structure design of bag filter is that the top cover and the filter barrel are tightly sealed by four sets of swing hammer ring head bolts, so that the filter can withstand extremely high filtration pressure and water hammer type pressure impact. The bag filter consists of three parts: the filter cylinder, the filter basket and the filter bag. The liquid to be filtered enters through the inlet of the filter, flows into the filter bag, passes through the interception of the filter bag and flows out through the outlet of the filter.
The inlet and outlet design of bag filter generally adopts side in and bottom out method for easy cleaning.
The main advantages
1) small side leakage probability of filter bag, effectively ensuring the filtration quality.
2) bag-type filtration can bear greater working pressure, less pressure loss, low operating cost and obvious energy saving effect.
3) the filtration accuracy of the filter bag has been continuously improved to 0.5 micron.
4) bag-type filtration has large handling capacity, small volume and large pollution capacity.
5) based on the working principle and structure of the bag-type filter system, it is convenient and fast to change the filter bag, and the filter does not need cleaning, saving labor and time.
6) the filter bag can be reused after cleaning to save cost.
7) bag filter has a wide range of applications, flexible use and diverse installation methods.
Bag filter operation
The bag filter is simple to operate. When using it, you only need to install the filter bag with the required degree of fineness in the filter cylinder, check whether the o-type sealing ring is intact, then tighten the ring bolt of the filter cylinder cover, and it can be put into work.
After the pump is started, the pressure gauge on the filter machine rises slightly, the initial pressure is about 0.05mpa. With the extension of the service time, the filter residue in the cylinder gradually increases. When the pressure reaches 0.4mpa, the cylinder cover should be shut down to check the residual residue in the filter bag.
The pressure of bag filter is generally adjusted at 0.1-0.3mpa, which can be adjusted through the reflux pipeline or the reflux valve on the pump. If the filtration pressure is too high, the filter bag and protective net will be damaged.