Diaphragm filter press, also known as diaphragm filter press, is a filter press with a layer of elastic membrane installed between the filter plate and the filter cloth. During use, when feeding is finished, high-pressure fluid or gaseous medium can be injected into the diaphragm plate. At this time, the entire diaphragm will swell and press the filter cake, thereby achieving further dehydration of the filter cake, which is commonly referred to as squeeze filtration. Large integrated automatic diaphragm filter press

For different diaphragm materials, the new generation of diaphragm filter presses can be divided into rubber diaphragm type and polymer elastomer diaphragm type filter presses.

The rubber diaphragm filter press is ideal for filtering materials with weak acids, weak bases, and not organic solvents. The rubber diaphragm filter press changes the shortcomings of the past split fixed type to save energy consumption after feeding. The new design makes the rubber diaphragm tympanum more sufficient, and the pressure and air volume used are relatively small. Under the same air source air volume, the rubber diaphragm The tympanic membrane is three times that of the polymer diaphragm tympanic membrane, which can greatly reduce energy consumption.

Installation Precautions

1. First of all, the foundation of the diaphragm filter press should be leveled before installation, and the level error of each installation reference plane should not exceed 2mm.

4. Install the main beam pillars. Assemble a main beam and the oil cylinder, and fix the main beam with the middle pillar with the main beam plywood.

6. Correct the diaphragm. Measure the level of the two main beams with a spirit level. The height difference between any two points on the two main beams should be less than 3mm. The height of the main beams should be adjusted by the main beam pillars. The error of the two diagonals of the frame should be less than 6mm. This can be achieved by adjusting the left and right positions of the tail plate.

7. Install the head plate. Hang the head plate on the rails of the two main beams, check the coaxiality of the spherical end cap and the piston rod. The coaxiality tolerance is 2mm. The coaxiality can be achieved by moving the spherical end cap up and down and left and right. Install a pressure plate to make the head plate Connected to the piston rod.

11, install the filter cloth, put on the filter cloth ring (sewing filter cloth without pressing ring).

1. The operator must be familiar with the content of the instruction manual and operate, adjust, use and maintain it strictly in accordance with the requirements of the instruction manual.

2. Use high-quality filter cloth. The filter cloth should not be damaged and the sealing surface should not be wrinkled or overlapped.

3. Frequently check whether the whole machine and components are installed safely, whether the fasteners are fastened, whether the hydraulic system is leaking oil, and whether the transmission parts are flexible and reliable.

5. After each startup, carefully observe the working condition of the machine. If there is any abnormality, stop the machine for maintenance immediately.

6. It is advisable that the oil temperature in the fuel tank is not higher than 60 ℃; water and dust are strictly prohibited in the fuel tank; the oil filter on the hydraulic station should be cleaned frequently. The electrical control part should conduct an insulation performance test once a month, and damaged electrical components should be replaced or repaired in a timely manner.

9. When the oil pump is started in winter, the hydraulic oil should be heated according to the needs, and it can be put into use only when the oil temperature rises above 15 ° C. Use low freezing point hydraulic oil in high and cold areas.

14. When unloading the slag, rinse the filter cloth and plate frame as required to ensure that there is no debris on the sealing surface.

18. When the diaphragm is pressed, the material must be filled in the filter chamber before pressing. After the air has been exhausted, the filter plate can be opened to discharge, so as not to cause the diaphragm to rupture. Compressed air pipeline should be checked frequently during work. If the air pipe falls off or the air leakage is serious, immediately close the air inlet valve and open the air release valve. After repairing, you can continue to use it. For actual operation instructions, please consult the manufacturer.

The main difference between diaphragm filter presses and ordinary box filter presses is that an elastic membrane diaphragm plate is installed between the filter plate and the filter cloth. During the operation, when the feeding is completed, the high-pressure fluid medium can be injected between the filter plate and the diaphragm. At this time, the entire diaphragm will swell and press the filter cake, thereby achieving further dehydration of the filter cake, that is, squeezing and filtering.

The first is positive pressure and pressure dewatering, also known as slurry dewatering, that is, a certain number of filter plates are closely aligned in a row under the action of strong mechanical force. A filter chamber is formed between the filter plate surface and the filter plate surface. The solid part of the filter material that is sent to the filter chamber under positive pressure is trapped by the filter medium (such as filter cloth) to form a filter cake, and the liquid part passes through the filter medium and is discharged out of the filter chamber to achieve the purpose of solid-liquid separation. With the increase of positive pressure, solid-liquid separation becomes more thorough, but from the perspective of energy and cost, excessively high positive pressure is not cost-effective.

After the dehydration is completed, the mechanical pressing force of the filter plate is released, and the single piece of the filter plate is gradually opened, and the filter chamber is opened to perform cake unloading as a main work cycle. Depending on the nature of the material being filtered, the filter press can be equipped with feed dewatering, squeeze dewatering, wind-blown dewatering, or single or double-sided dewatering, the purpose of which is to reduce the water content of the filter cake.