1 the characteristics of the diaphragm filter press quickly

(1) port feed, feed speed and uniform, filtration cycle is short, high production efficiency, reduce the possibility of differential pressure in the filter plate, prolong the service life of filter plate.

(2) cylinder compression, filter plate force uniform and reasonable, good sealing, no spray material.

(3) the diaphragm pressing: secondary crushing dehydration, low moisture content of filter cake, cake formation is good; Filtration cycle is shortened, the whole machine processing efficiency.

(4) the group begins: filter plate group discharging, speed, operation time is short, high production efficiency.

(5) vibration discharging: remove the artificial tong material of heavy labor.

(6) automation control: adopt unique monitoring device, has realized the full automation. (7) optimization design: covers an area of less, low consumption, low noise. Humanized design (8) : with reliable safety protection device, the operation is convenient.

2 diaphragm filter press system quickly

Rapid diaphragm filter press is mainly composed of frame parts, filter, filter plate mobile mechanism, clamping part and unloading mechanism, hydraulic system, electric control system composition. After the rack is mainly composed of main girder, fixed clamp, sustained and auxiliary parts; Filtering part by squeezing the filter plate component and filtering filter plate component arranged alternately on main girder, on both sides of the two kinds of filter plate are covered with a layer of filter cloth, to form the filter chamber; Filter plate mobile mechanism is mainly driven by hydraulic motor, chain; Pressure parts by oil cylinder, the slider components; Discharge mechanism consists of two vibrating cylinder and fixed on the filter plate of swinging rod; Hydraulic system including the oil pump, hydraulic control components, hydraulic actuators, high oil tank, etc.; By the electric control cabinet, electric control system of press filter, the oil pump motor of the hydraulic pressure station and the mechanical action travel switch electromagnetic valve and slurry compressed air line of electric control valve.

3 quick working principle of diaphragm filter press filter press, first through the drive mechanism, sprocket, chain transmission will be folded filter plate, filter under the action of liquid in the pump, through pipes from fixed clamp in the end, the upper pressure plate filter plate and activities into the material hole into the filter chamber, and under the effect of pressure, the discharge of liquid, solid particles are filter cloth intercept in the chamber. After the filter cake formation, the press filter plate between the diaphragm and compressed air going into the 016 ~ 018 mpa, make the elastic deformation of the diaphragm produce extrusion in the direction of filter cake to secondary dehydration. To prevent it from the pipe into the unfiltered slurry with the filter cake into the conveying system, and then to the pipeline zhongtong in 016 ~ 018 mpa compressed air, make the unfiltered slurry returns to the slurry tank. After the completion of the filter cake dehydration, clamping cylinder piston rod back, through the open mechanism of hydraulic motor drive sprocket, chain, start all filter plate points three times discharge. Filter cake after unloading, the pressure for 013 ~ 015 mpa water spray cleaning filter cloth.

4 application in the process of failure analysis and solution measures

Hydraulic station fault

(1) the plunger pump noise is too big. Solution: one is to check the direction of rotation of the pump. Break loose connection pump discharge of hydraulic pipe and valve block, connect one end of the plunger pump running, without oil or less oil, the rearrangement of arbitrary two wires of the motor, so that the rotation of the pump in the right direction; Second, check the bearing of the pump, open the pump body, if it is found that bearing apart or adhesion, it is replaced.

(2) the plunger pump start too often. A hydraulic system leak or high pressure may be due to the period of safety pressure relief valve set too low, if the hydraulic oil pipeline interface, then replace the sealing ring; If the pressure gauge shows the high pressure section of the safety pressure relief valve pressure regulation range, not the higher pressure clockwise to the prescribed scope. Another possibility is cylinder seal is damaged, need to change in time.

(3) the hydraulic pump can not meet the need of high pressure. First check whether the hydraulic station is the exhaust, if not, the exhaust in time; 2 it is to check the hydraulic station and oil cylinder pipe interface, to see if the hydraulic system leak, if the oil, then replace the sealing ring; 3 it is to check the hydraulic pump, hydraulic valve, or cylinder seal for damage, damage to timely for repair or replacement; Four is to check the two-stage valve the pressure setting of the high pressure section, if too low or valve has been damaged, should be in accordance with the hydraulic connection diagram to reset or repair the valve; Five is to check the safety pressure relief setting of the high pressure section, if too low, should be in accordance with the hydraulic connection diagram reset; Six is to check the electromagnetic valve is damaged, should be replaced if necessary; Seven is due to a complete set of filter plate is too short, lack of filter plate, should add filter plate or in the pressure between the plate and the cylinder piston rod extend the period of the piston rod.

(4) hydraulic pump oil. The first may be the hydraulic station fuel tank oil level is too low, should be added to the regulation of oil level; The second may be hydraulic pump inlet connection seal is not tight, should increase tight sealing device; The third may be piston pump piston has been damaged, need to change the piston.

(5) the hydraulic pump oil shortage.

The oil is too thick, should use the hydraulic oil of low viscosity;

Second, the oil pump motor direction of rotation error, should change the direction of rotation;

Three is hydraulic pump double valve is set too low, should be adjusted to 5 mpa;

Four is pump wear out, need to change the pump;

Five is the safety of the hydraulic station pressure relief valve set pressure is too low, should be set according to the hydraulic connection diagram to safety pressure relief valve.

Plate system failure

(1) cannot be opened plate. Possible reasons are: (1) the screen no signal light: check whether anyone in the maintenance of filter press or line is disconnected, if any, evacuated or connection line; (2) to drive the motor damage: check whether the motor is badly worn or internal oil opened and if so, replace the motor; (3) limit switch damage: check the board whether an action limit switch on the light, if not bright, change the limit switch; (4) the pull board action of electromagnetic directional valve damage: demolition hydraulic valves on the electric source, open hydraulic pump, hydraulic valve and, if you don't pull board, the replacement of hydraulic valve; Electromagnetic directional valve coil (5) : such as in the case of electricity hydraulic valve is normal, then the coil is damaged, need to change the coil.

(2) the filter plate can't move to the right place. The reasons are: (1) filter plate suspension mechanism guide rail is too dirty, should clear guide rail; (2) the tensile plate chain is too loose or too tight, general with drooping under pressure after the chain of no more than 2 cm; (3) sheets institutions lack of lubrication, should add lubricating oil. (4) hydraulic system pressure is not enough, should be transferred to the specified pressure.