Vertical leaf filter structure: the main filter by filter tank, several filter films, starting with the automatic slag cover institution device component, the raw material liquid is pumped at a pressure of about 0.5MPa, 80-90 ℃condition by 160-280 mesh stainless steel wire mesh pieces, edible vegetable oil from the chip lead, after dumping slag automatic filter.
Application Features: achieve semi-continuous, efficient diesel separating residual waste clay can be as low as 16% or less, also applies to the hydrogenated oil, winter of oil filter.
Vertical leaf filter working process:
1, open the oil inlet valve of the valve, and the overflow opening pump, fill the oil to the tank, mirror observed liquid flows out from the overflow pipe, illustrate the raw liquid tank has been filled.
2, close the overflow valve, open the circulating valve, start cycle, about 5-10 min, from the liquid outlet tube mirror observed above, illustrate the cake has been formed.
3, closed circulating valve, open the valve to start above, filtering, the general filter cake thickness control in 2-3 cm, change from the upper part of the tank pressure gauge can observe the pressure, in the process of filtering, the filter cake with thickened, pressure rise, generally about 0.4papressure, the need to stop the pump.
4, cake blowing process, stop the pump liquid inlet valve closed, open the inlet valve, start blowing cake, pressure is generally maintained at 0.45 - 0.5pa, the best effect of biscuit, cake blowing time is generally 15-30 min, mirror from the observation above tube, above has little half mirror, can stop the biscuit.
5, the vibration tapping process, open sewage valve, will return to the original tank vertebral lower solution, open the exhaust valve, so that the pressure back to zero, open the valve, vibration tapping.
Operation process and requirements:
First, open the inlet valve is heated to 65-90 ℃ slag containing crude oil or material pumped into the bottom inlet after about 30min until full. Open the oil valve chamber when the pressure is gradually increased by about 0.2-0.4MPa. By this time absolutes outside of the filter chip into the chip, the lower part of the discharge tube set, and by observing the clarity of the oil pipeline. Greaves are constantly deposited on the outside of the filter, until such time as the two adjacent pieces filter cake is not in contact must be drained. Filtration cycles required in accordance with the amount of slag containing oil and the nature of the approximately 1.5-2.5h.
The filter starts when the oil is very turbid, it can be direct steam (0.5MPa) valves cake was blown dry for about 30min, causing oil cake was less than 20% requirement. This oil is discharged when drying is also sent back to the tank. Then open the butterfly valve and clean the canister, and then open the valve so that air entering the vibrator starts vibrating 1-2min, generally drier cake if you can dismount 1min cake. Finally, close all valves and butterfly valves for the next filtration cycle. In order to achieve filtering "Intermittent - continuous" production, generally use two filter-parallel operation.
Filter common faults and maintenance:
1, under thick thin on the cake was pear-shaped: This is the filter press into the cake when the pressure fluctuations due to the concentration of the diluted filtrate leaving under thick caused. Will directly affect the filtration area and the rate of decline; and the filter cake quit blowing unclear; Remedy: Timely excess oil filter tank overflow discharge from the mouth, back hair tank; adjust the operating pressure to the right point;
2, the filtrate turbid: Cause: filter is damaged, there is a gap pinch edges Plates; filter sheet discharge port O-ring is not sealed; filtration pressure fluctuations; crude oil entrained in the air; the oil pipeline solid impurities remaining in uncleared; mesh filter aid and the filter does not match; individually excluded for these reasons, and the filtrate was finally reached to clarify;
3, the filter pressure rises too fast, filtration cycle is too short: The main reason is the "filter clogged" aid too small, plus an increase in oil filter temperature is lower gum blocked filter channels;
4, the vibrator does not shake: reason: gas pipeline wrong, causing the gas flow is small, low pressure and can not start; check correct supply line and the air compressor to ensure normal vibration of the vibrator.