Filtration conditions of the ZC-Ⅱ/Ⅲ Mechanical Rotary Backflush Flat Bag Dust Collector: Dust-laden airflow enters the upper space of the filter chamber tangentially. Due to the volute-shaped inlet, large particles and agglomerated dust particles are centrifugally spun along the cylinder wall and into the ash hopper. Small dust particles diffuse into the gaps between the filter bags and are retained by the bags. They adhere to the outer layer of the filter bags, then pass through the filter walls and the bag openings on the flower plate, collecting in the clean room. The ventilator then draws the air out and releases it into the atmosphere. The ZC-Ⅱ/Ⅲ Mechanical Rotary Backflush Flat Bag Dust Collector has sufficient momentum for backflush airflow, which blows from the rotary arm nozzle into the bag openings, blocking the filtration airflow and changing the pressure inside the bags, causing the bags to vibrate and shake off accumulated dust.

In the ZC-type mechanical rotary reverse-blowing flat bag dust collector, driven by the system’s main fan, dust-laden air flows from the dust collector’s air inlet into the pre-dust collection chamber. The dust-laden airflow is then diverted by the baffle and flows into the ash hopper. Simultaneously, the flow rate slows down. Due to inertia and the dust’s own weight, coarser dust particles fall directly into the ash hopper and are discharged from the ash discharge mechanism, thus achieving pre-dust collection. Other lighter and finer dust particles follow the airflow upward and are adsorbed on the outer surface of the filter bags. After filtration, the clean air passes through the filter bags into the upper chamber and is discharged through the air duct.

As the filtering condition continues, more and more dust accumulates on the outer surface of the filter bag, which will correspondingly increase the operating resistance of the equipment. For the normal operation of the system, the dust collector resistance should be maintained within the limited range of 1200-1600Pa. When it exceeds this limited range, the pulse automatic controller should issue instructions through fixed resistance, timing or manual operation to perform three-state cleaning.

ZC mechanical rotary back-blowing flat bag dust collector consists of the following four parts:

1. Back-blowing dust cleaning mechanism: including rotary arm, nozzle, circle back-blowing mechanism, circulating air duct, back-blowing air duct, back-blowing blower, rotary arm deceleration mechanism.

2. Upper box: includes dust collector cover, rotating cover device, cleaning chamber, bag changing hole, observation hole, and air outlet.

3. Middle box: including flower plate, filter bag, filter bag frame, filter bag guide port, filter chamber cylinder, air inlet, and inlet door.

4. Lower box body: including positioning support frame, ash hopper, star-shaped ash discharge valve and support.

The main features of ZC type mechanical rotary reverse air flat bag dust collector:

1. The current offline three-state (filtration, cleaning, and static) cleaning method is adopted to clean the dust and avoid the “re-adsorption” phenomenon of cleaning.

2. For key components that affect the main performance, such as pulse valves, the service life of the diaphragm of the wearing parts exceeds 1 million times, and the continuous operation can be more than four years.

3. The chamber spray cleaning technology (air box pulse) is adopted. One pulse valve sprays one chamber at the same time (the number of filter bags in each chamber has four specifications: 32, 64, 96, and 128). Therefore, compared with the ordinary high-pressure pulse dust collector, one valve sprays 6 bags, which can reduce the number of pulse valves by 6-20 times.

4. The pre-dust collection mechanism is designed, which not only overcomes the direct erosion of dust on the filter bag, but also can handle high concentrations, allowing the inlet concentration to be as high as 1000g/Nm3.

Working principle of ZC type mechanical rotary back-blowing flat bag dust collector

Filtration Operation: Dust-laden air flows tangentially into the upper space of the filter chamber. Due to the volute-shaped inlet, large particles and agglomerated dust are centrifugally driven along the cylinder wall and into the hopper. Small dust particles diffuse into the gaps between the filter bags and are retained by the dust removal bags. They adhere to the outer layer of the filter bags, then pass through the filter walls, through the bag outlet on the ceiling, and into the clean room. The air is then drawn out by the ventilator and discharged into the atmosphere.