What is the difference between open and dark flow in a diaphragm filter press filter plate?

What is the difference between open flow and dark flow filter presses? Open flow and dark flow filter presses are different. When we look at the brand of the filter press, non-professionals do not know much about the meaning of the letters on the brand name, but if we look carefully, we will find a set of opposing letters, that is, “A” and “M “A” stands for dark flow drainage, while “M” stands for open flow drainage. They are the phonetic first letters of “dark” and “bright” respectively. What are the differences between open flow and dark flow filter presses?

The open flow filter press is a filter press in which the filtered liquid will inevitably be contaminated or mixed with impurities again in the harsh environment of the filter press, so we need a dark flow filter press to better protect the fruits of all the work done in front of the filter press and to design an airtight environment to keep the filtrate pure. This is why open flow filter presses can only be used in industries that require solids after the filtration of a solid-liquid mixture, such as metallurgy, ore, etc., while dark flow filter presses are used in industries that require a high level of liquid after filtration, such as pharmaceuticals, biology, etc. This is the difference between open-flow and dark-flow filter presses.

In general filter presses use open-flow drainage, so we are familiar with open-flow drainage chamber filter presses or diaphragm filter presses, where we see that when the filtrate passes through the filter chamber, it passes directly through the drainage pipe below the filter plate and is discharged directly from the equipment through the tap. In contrast, a concealed flow filter press has a system of collecting the filtrate under the tap and collecting the filtered design through a pipe. The conventional method is to connect a sealed hose to the tap under the filter press plate and a larger pipe underneath the hose that is connected to all the hoses so that the liquid is well protected. Concealed flow filter presses are generally suitable for toxic, odorous, volatile and flammable materials.

Therefore, to distinguish between “bright” and “dark” filter presses, we can look at the bottom of the filter plate to see if there is a collection pipe, and if there is no pipe on one side, it must be designed as a bright flow filter press.

Maintenance method of the filter plate of the chamber filter press: The filter plate of the chamber filter press is a commonly used solid-liquid separation equipment, which is widely used in sludge dewatering projects. It is mainly composed of transmission part, filter plate part, pressure plate part, thrust plate part and pressing device (mainly hydraulic pressing device), hydraulic system, electrical control system and auxiliary part. After using the filter plate of the chamber filter press for some time, it is essential to use and operate the filter plate correctly in order to ensure the normal operation of the filter plate of the chamber filter press and prolong its service life. In the process of using the filter plate, it should be checked frequently china filter press machine suppliers and maintained in time.

How to maintain the filter plate of the chamber filter press

  Maintenance of the filter plate of the chamber filter press, maintenance of the filter plate of the chamber filter press.

  1. Before using the filter plate of the chamber filter press, check carefully whether the connections are firm and whether the parts are in good condition, check the number of frames, plates or diaphragm plates and the sequence in the machine; and move all the frames and plates to one end of the stopper plate, so as to ensure that the filter plate will not deviate in the pressing process.

  2. Wash the filter cloth regularly. The filter cloth will have a lot of impurities in the process of use. Therefore, it is necessary to check the clarity of the filtrate and the filtering effect of the sewage in time. It is recommended to clean the filter cloth at the end of each working day according to the situation. The filter cloth should also be checked frequently and should be replaced and repaired if there are any leaks. When sewing the filter cloth, the broken part should be cut off and then sewn again to prevent the sealing surface from overlapping and to increase the thickness of the filter cloth.

  3. For bearings, piston rods, pull plate trolleys, sprocket chains, and other parts should be checked regularly, and their internal structure should be kept tidy and well lubricated to keep them operating flexibly. The hydraulic oil should be HM46 or HM68 and must be kept clean. When changing the oil, drain the used hydraulic oil from the tank and cylinder and wipe the tank clean. Continue to use one month and then replace it once, after half a year, so as to ensure the normal use of the filter plate of the chamber filter press.

  4, the maintenance of the hydraulic system, mainly to check the maintenance of hydraulic components and the sealing of the interfaces, to maintain its normal operation. When the oil temperature of the hydraulic system is lower than 10℃, a heater can be used to increase the oil temperature.

  5, because the hydraulic system in the hydraulic station is a closed space, long-term use of hydraulic oil will become less and less. When the hydraulic oil is low, the oil pump will idle, which may burn the motor and damage the hydraulic system. Therefore, the hydraulic system should be regularly replenished and replaced, and the oil filter should be cleaned to ensure the normal operation of the hydraulic system.

  6, for the electrical control system to be insulated check, to ensure good insulation, if found that the accuracy of electrical components is poor, then it should be repaired in a timely manner.

  7、For the sealing of the filter plate, it should be kept clean and tidy, and the filter cloth should be checked when it is pressed to ensure that it is not folded, broken or slagged, so that it is flat and intact to ensure the filtering effect; at the same time, the filter cloth should be flushed frequently to ensure the filtering performance of the filter cloth. If the filter cloth is not used for a long time, it should be cleaned and discharged neatly on the rack of the filter plate of the chamber filter press and pressed with 1 to 5 MPa pressure. The filter cloth should be cleaned and dried in the sun; the exposed part of the piston rod and the integrated block should be greased.

  8. Equipment inspection should be carried out during the working process. During the work of the filter plate of the chamber filter press, it is necessary to check the operating status of each link of the machine in a timely manner to see if the parts are damaged, and if any abnormality is found it is necessary to notify the maintenance personnel for investigation and repair.

  9、 Regularly inject grease into the bearings, spray oil on the drive chain and equipment track, and remove dirt.

  10, correct use of equipment, especially do not open the chamber filter press filter plate on an empty stomach, otherwise the filter plate is easy to deformation, damage, or even paralysis.

  11, the chamber filter press filter plate beam “elastic deformation”: the filter plate row to the deformation of the beam in the direction of the arc, the pressure can be “reset”; conditions, the filter press single-headed lifting, position can be; if the plastic deformation, then with the help of “(jack, etc.) When the new filter cloth is replaced, there will be leakage at the beginning due to the capillary pores. For fast dewatering materials, you can feed the material gradually to avoid blocking the slurry when it is not sent to the head: close the liquid outlet valves of several filter chambers at the end of the pressure plate, open the others, and then gradually open the other valves when the material is sent to the head, and gradually open them all!

  12、If the filter plate is not used for a long time, it should be cleaned and discharged neatly on the rack of the filter plate of the chamber filter press and pressed with 1 to 5MPa pressure. The filter cloth should be cleaned and dried in the sun; the exposed part of the piston rod and the integrated block should be greased.

Leave a Reply

Your email address will not be published.