Introduction to boiler dust collector installation and commissioning and offline maintenance function

Boiler dust collector installation and commissioning and offline maintenance function

The boiler dust collector is a device for dust removal in dry conditions. Such a device first uses the filter bag therein to capture the dust-containing flue gas, and then filters the sub-absorbed soot with the first attached dust. The working principle of this type of dust collector is: when the dust-containing gas enters the boiler dust collector, the gas velocity will decrease, and the major dust will settle into the ash hopper due to gravity, and the gas containing fine dust will pass through. When the bag is filtered, dust particles will bypass the fiber structure, because the inertia will collide with the fiber and be intercepted, so that the other components of the filter are purified. However, when the amount of accumulated dust reaches a certain level, the pressure inside and outside the filter bag can almost meet the conditions, so the filter bag should be regularly cleaned.

Since the dust removal efficiency of the boiler dust collector is too low or does not remove dust at all, the high temperature flue gas introduced by the induced draft fan has a large amount of ash particles. These high-temperature small ash particles collide at high speed and rub the impeller of the induced draft fan. In a short period of time, the blades are rubbed and worn, which destroys the original dynamic and static balance of the impeller, thus intensifying the vibration of the fan, resulting in damage to the fan bearing. A series of faults such as shaft bending and burning of the motor caused the induced draft fan to stop. In turn, the boiler and steam turbine generators are shut down, and the production of the whole plant is stopped.

The dust removal effect of the boiler dust collector depends largely on the choice of the filter bag and the way the dust is applied. Filter bags should be considered for their corrosion resistance, heat resistance and mechanical strength. The cleaning method can be divided into five types: gas ring back blowing method, mechanical vibration mode, pulse mode, sound wave mode and composite action mode. In general, the pulse mode is a widely used one because it has a good effect of cleaning dust, and the intensity and frequency of pulse soot blowing can be adjusted.

Boiler dust collector installation requirements: For easy transportation, the dust collectors are disassembled and shipped. After you receive the equipment. First install the box list check and do the warehousing work. If there are missing parts or damages, we will fill in the defects and repair in time. Before the installation of the precipitator, the foundation should be checked and proofed. The installation work should be carried out in strict accordance with the drawings and installation procedures. The filter bag cages must be hung together with the packing box to the top of the dust collector and installed one by one. At the same time of installation, the bag cage should be inspected for deformation and damage.

When installing the dust filter bag, make sure that the filter bag is away from the belt with a pointed edge and scratches the dust bag. The longitudinal seam of the filter bag should face in one direction, facing away from the air inlet. The filter bag is rolled into a small size so that the contact between the filter material and the flower plate is small. Before the dust collector is commissioned, the transmission mechanism and the device should be inspected, and the rotating and sliding parts should be lubricated to ensure flexible operation.

Boiler Dust Collector Inspection and Maintenance: Boiler Dust Collector has offline maintenance function. Through the operation of the manual valve regulating valve of the offline valve and the air inlet, the single compartment of the dust collector can be taken offline, thereby facilitating the non-stop maintenance under the working condition of the dust collector. The design of the multi-chamber and small unit of the dust collector in this case ensures that the normal full load of the boiler will not be affected by the drastic reduction of the filter area of ​​the precipitator in the state of offline maintenance of the dust collector. The selection of the full filter wind speed of the boiler dust collector below 1m/min allows the boiler dust collector filter bag to use only the sealing measures instead of the broken filter bag when the breakage rate is below 5%, so as to reduce the maintenance workload and ensure dust removal. The normal operation of the device.

The design of the upper casing of the dust collector ensures that the dust collector has sufficient heat exchange space when the cover needs to be opened, and the shortening of the cooling time is beneficial to the maintenance and maintenance time control. At the same time, the design ensures that the routine maintenance and repair work of the dust collector is performed outside the machine, improving the working environment. All upper cabinet components are designed with the convenience of manual operation in mind, and all operations require only two people to use conventional tools.

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