Pulse of Dedusting Equipment in Welding Workshop
The dust collector is mainly composed of upper box, middle box, ash hopper, air inlet equalizing pipe, support filter bag, injection device and ash unloading device. Dust-containing gas enters each compartment hopper from the inlet air equalizing pipe of the dust collector, and under the diversion of the ash hopper diversion device, the large particles of dust are separated and directly fall into the hopper, while the finer dust evenly enters the middle box and is adsorbed on the outer surface of the filter bag. Clean gas enters the upper box through the filter bag, and passes through the off-line valves and the filter bag. The exhaust duct is discharged into the atmosphere. When the resistance of the equipment reaches the limited resistance value (generally set to 1500Pa), the off-line valve of a chamber is automatically closed by the ash cleaning control device according to the set value of differential pressure or the set value of ash cleaning time, and then the electric control pulse valve is opened according to the set procedure to stop the wind and inject. The instantaneous injection of compressed air increases the pressure in the filter bag and shakes off the dust on the filter bag (even the sticky fine dust can be cleaned thoroughly) to the ash hopper, which is discharged by the ash removal mechanism.
The working principle of the cyclone dust collector in the welding workshop is that the dust-containing gas enters tangentially from the inlet. While the air flow obtains the rotational motion, the air flow separates up and down to form a double-spiral movement. Dust has a strong separation effect at the boundary of the double-spiral volute. Coarser dust particles are separated with the air flow of the lower spiral volute. To the outer wall, part of the dust is drawn out from the central opening of the bypass separation chamber, and the remaining dust is carried to the ash hopper by downward airflow. The upward spiral flow can agglomerate fine dust particles, thus improving the efficiency of dust removal. The finer dust particles are carried upward by the upper spiral airflow and form a strong rotating upper dust ring under the top cover. They enter the upper hole of the bypass separation chamber together with the upper spiral airflow, and join with the internal airflow through the return air outlet. The purified gas is discharged from the exhaust pipe, and the separated dust enters the hopper.
Dust-containing gas enters the box body and is filtered by flat cloth bag filter. Dust is blocked on the outside surface of the filter bag. The purified gas enters the fan through the filter bag and is inhaled and discharged directly by the fan. With the increase of filtering time, the dust adhering to the outside of the filter bag also increases, and the resistance of the filter bag increases accordingly, thus affecting the performance of the filter bag. Dust removal efficiency, at this time start the vibration mechanism to make the dust adhering to the surface of the filter bag shake down, and the dust falling in the drawer is removed by manual pull.
The working principle of dust removal equipment in welding workshop:
Dust-containing gas enters the box through the air inlet and is filtered by the filter bag. Dust is blocked on the outside surface of the filter bag. The purified gas is discharged from the outside of the box through the air outlet of the fan and directly into the indoor (or through the air duct to the outdoor).
With the continuous work of the main machine, the dust adhering to the outside of the filter bag keeps increasing and the resistance of the equipment keeps rising. Therefore, it is necessary to clean the dust so that the dust adhering to the outside of the filter bag shakes down and falls into the dust collector (drawer) through the ash bucket and is removed manually.
Dusty gas enters the gas distribution chamber from the main intake pipe, and then enters the annular gap between the ceramic cyclone body and the guide vane. The guide vane makes the gas move from straight line to circular motion. Most of the rotating airflow flows downward spirally from the cylinder and toward the cone along the cyclone body. The dust-containing gas generates centrifugal force during the rotating process, and throws the dust particles with density greater than the gas to the cylinder wall. When dust particles come into contact with the cylinder wall, they lose inertia force, and the momentum of the inlet velocity and the downward gravity fall down along the wall to the ash outlet and enter the total ash hopper. When the downward spiral flow reaches the lower end of the cone, the spiral flow (clean air) continues from the bottom to the top in the direction of the axis of the cyclone tube in the same direction of rotation, and enters the exhaust chamber through the ceramic cyclone exhaust pipe, which is discharged from the main exhaust port.