Black Rubber Pneumatic Power Valve Diaphragm of MECAIR Type with Great Sealing

As an efficient dust collector, bag dust collector is widely used in various industrial waste gas dust removal, such as light industry, machinery manufacturing, building materials, chemical industry, non-ferrous smelting and iron and steel enterprises. It has the advantages of simple structure, less investment, stable operation and can recover dust which is difficult to recover due to high specific resistance.

Compared with the venturi scrubber, the utility model has the advantages of low power consumption, easy comprehensive utilization of recycled dry dust and no problem of mud treatment. Therefore, for fine and dry dust, it is suitable to use a bag filter for purification.

The Picture of Installation of Diaphragm in the Pulse Valve

The General Characteristics of Diaphragm

Applicated in Bag Dust Filter Systems

A Method of Cleaning Dust from a Bag Filter

The method of dust removal is also an important factor affecting the efficiency of filter. As mentioned above, the filter efficiency is the lowest after the filter material is just cleaned. With the increase of the filter time (i.e. the thickness of dust layer), the efficiency rises rapidly. As the dust layer thickness increases further, the efficiency remains at an almost constant high level.

Different ways of dust removal, different amount of escaping dust when dust removal, and different amount of residual dust after dust removal, so dust discharge concentration of dust remover is different. For example, the dust discharge concentration after mechanical vibration cleaning is lower than that after pulse spraying; The dust discharge concentration of the former is several times that of the latter when compared with the direct pulse (compressed air is injected directly into the filter bag) and the damping pulse (in the ash cleaning system, a device can gradually reduce the pressure in the filter bag after the solenoid valve is closed).

This is because in the case of direct pulse, the filter bag contracts sharply after spraying, and the filter air and the acceleration of the filter bag work together to increase the penetration of dust that is loosened after spraying. The resistance of the filter layer is higher than that of the direct pulse because there is more residual dust on the filter material. In addition, for the same ash-cleaning method, such as mechanical vibration ash-cleaning method, when the vibration frequency is constant, the amplitude increase will significantly increase the dust discharge concentration. But when the frequency and amplitude change, the dust discharge concentration is basically unchanged. The dust discharge concentration of the bag filter in practical application depends on the proportion of the filter bags in the total number of filter bags, the distribution of air flow in all the filter bags and the influence of the parameters of dust removal.

The Working Principle of Pulse Valve Diaphragm

Pulse valve diaphragm before and after the pulse valve is divided into two air chamber, when electromagnetic pulse valve in the pulse bag filter dust on the clean compressed air system, the compressed air through the orifice, after entering air chamber, the gas chamber pressure after the air outlet of the valve on the diaphragm is clingy, pulse valve closed, the pulse controller output signal, the pulse valve moving armature, stomatal opening after the valve chamber, rapid loss of pressure chamber, make diaphragm backward-shift, compressed air through the outlet valve injection, injection, pulse valve is fully open pulse controller output signal disappears, the electromagnetic pulse valve pilot title iron reduction, air chamber after put the stomatal closure, After the air chamber pressure increases, the pulse valve diaphragm is close to the valve's air outlet, the pulse valve is in the closed state, the spraying stop, the length of the blowing time the amount of air is controlled by the controller.

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