Questions and Answers For Filter Press Usage

1. How to judge that the filter press is full?

(1) The model of the outflow liquid can be judged according to the water output of the tap. When the water flow basically stops, it means that the filter press is full.

(2) Or by observing the working pressure of the ceramic plunger pump, if the pressure reaches about 1.5, it means that the solid in the filter press has formed, so the pressure has increased.

2. How long does it take to replace the hydraulic oil?

(1) Generally, it needs to be replaced once a year, or the working time exceeds 2000 hours.

(2) In special circumstances, it is necessary to increase the replacement frequency.

(3) Be careful not to mix water and other impurities in the hydraulic oil, so as not to affect the normal operation of hydraulic components.

3. When do I need to replace or clean the filter cloth?

(1) When it is found that the filter cake starts to become moist, slippery, and not as dry as before. This means that the water permeability of the filter cloth has deteriorated.

(2) You can first try to clean the filter cloth to clean the remaining mud cakes in the pores of the filter cloth.

(3) If the effect is still not good, you should consider replacing the filter cloth.

(4) The service life of the filter cloth depends on the frequency of use, whether it is cleaned and maintained frequently, and the characteristics of the filtered sludge.

(5) Generally speaking, the longest service life of filter cloth is 6 months.

(6) Another thing to pay attention to is the damage of the filter cloth. If the filter cloth is damaged, the sludge will be mixed into the filtrate and the filtrate will be unclear. It can usually be judged by the water outlet of the faucet and needs to be replaced in time. If it is not replaced in time, the mud cake will penetrate the filter cloth and gradually block the backflow groove between the bosses of the filter plate where the filter cloth is located. The fluid will not flow smoothly and the pressure will be uneven or overpressure, which will eventually cause the filter plate to be damaged.

4. Do I need to replace the filter plate?

(1) The normal service life of the filter plate can be several years, but it needs to be maintained and maintained at ordinary times.

(2) If a broken plate is found, it needs to be replaced in time to avoid affecting the remaining filter plates.

5. How long is a cycle?

(1) The cycle time mainly depends on the dewaterability of the sludge. Generally, a cycle is between 2-4 hours.

6. How can I guarantee a drier mud cake?

(1) Ensure that the filter cloth is cleaned and replaced in time

(2) Ensure sufficient cycle time

(3) Some special sludge needs to be pre-treated and then filtered

7. Why is the filtrate unclear?

(1) It is possible that the filter cloth selection is incorrect

(2) It is possible that the filter cloth has been used for too long and needs to be replaced

(3) There may be holes in the filter cloth

(4) If it is an embedded filter cloth, the rubber strip may be deformed and fall out of the groove

(5) It is possible that the cloth on the head plate is not installed properly

8. How can I adjust the compression pressure of the cylinder?

(1) Due to the different model and delivery time, please consult my professional staff (Fujian Nanxing Environmental Protection Technology Co., Ltd.).

9. The designed feed pressure of my filter press is 1Mpa. Can I increase the feed pressure?

(1) It is strictly forbidden to feed the material with overpressure, which will cause shotcrete, and it will be destructive to the filter plate and hydraulic system of the filter press.

(2) If you need to use a higher feed pressure, there are other corresponding models, please consult our company (Fujian Nanxing Environmental Protection Technology Co., Ltd.).

10. Why does my filter press leak during the filtration process?

(1) If the filter plate has not been replaced recently, it may be due to residual filter cake sticking to the sealing surface.

(2) Check whether the cylinder pressure is at the recommended value, if not, please adjust it.

(3) It may be because the filter cloth has wrinkles, holes, or the embedded rubber strips are loose.

(4) If the problem still cannot be solved, please consult a professional (Fujian Nanxing Environmental Protection Technology Co., Ltd.).

11. Why is there leakage at the feed of the new machine?

(1) Please check whether the sealing ring is flat and intact, whether the sleeve is tightened, sometimes it may be loose and damaged during transportation