Pulse dust collector

Pulse dust collectors are a type of dust removal equipment. They adopt compartmentalized offline pulse cleaning technology, which overcomes the respective shortcomings of reverse blowing cleaning and general pulse cleaning. They have strong cleaning capacity, high dust removal efficiency, low emission concentration, low air leakage rate, low energy consumption, small floor space, and reliable and stable operation. This series of dust collectors is suitable for: dust removal from calcium carbide furnaces and various electric furnaces in ferroalloy plants. Dust removal for calcium hydroxide production line; Dust removal for calcium oxide production line; Flue gas purification in steel plants Dust removal for coal-fired boilers and small boilers in power plants; Dust removal for waste incinerators High-temperature flue gas dust removal in smelters; Aluminum plant flue gas purification Dust removal at the tail and head of the rotary kiln in a cement plant; Dust removal of tail gas from carbon black plants, etc.

Advantages and features

It adopts the compartmentalized stop-air pulse jet cleaning technology, which overcomes the shortcomings of conventional pulse dust collectors and compartmentalized reverse-blowing dust collectors. It features strong cleaning capacity, high dust removal efficiency, low emission concentration, low air leakage rate, low energy consumption, low steel consumption, small floor space, stable and reliable operation, and good economic benefits. It is applicable to the purification of dusty gases and the recovery of materials in the metallurgy, building materials, cement, machinery, chemical, power and light industry sectors.

2. Due to the adoption of compartmentalized stop-air pulse jet cleaning, a complete cleaning can be achieved with just one jet, thus extending the cleaning cycle, reducing the energy consumption for cleaning, and significantly lowering the consumption of compressed air. At the same time, the fatigue degree of the filter bag and the pulse valve is also reduced accordingly, thereby increasing the service life of the filter bag and the valve plate.

3. Bag replacement and maintenance can be carried out in compartments without stopping the system fan and under the condition that the system is operating normally. The bag opening of the filter bag adopts an elastic expansion ring, which has good sealing performance and is firm and reliable. The filter bag frame adopts a polygonal shape, which reduces the friction between the bag and the frame, extends the service life of the bag, and also facilitates bag unloading.

4. The upper bag-pulling method is adopted. When changing bags, after the frame is pulled out, the dirty bags are dropped into the ash hopper at the bottom of the box and taken out through the manhole, which improves the bag-changing operation conditions.

5. The box body adopts an airtight design with excellent sealing performance. The inspection door is made of high-quality sealing materials. During the manufacturing process, kerosene is used for leak detection, resulting in a very low air leakage rate.

6. The inlet and outlet air ducts are compactly arranged, resulting in low air flow resistance.

Working principle

A pulse dust collector refers to the method of removing dust adhering to the filter medium (bags or cartridges) by blowing compressed air. Depending on the size of the dust collector, there may be several sets of pulse valves, which are controlled by a pulse controller or PLC. Each time, one set of pulse valves is opened to remove the dust from the part of the bags or filter cartridges it controls, while the other bags or filter cartridges operate normally. After a period of time, the next set of pulse valves is opened to clean the next part. The dust collector is composed of ash hoppers, upper box bodies, middle box bodies, lower box bodies and other parts. The upper, middle and lower boxes are of compartmentalized structure. During operation, the dusty gas enters the ash hopper through the air inlet duct. Coarse dust particles directly fall to the bottom of the ash hopper, while fine dust particles turn upward with the airflow and enter the middle and lower boxes. Dust accumulates on the outer surface of the filter bags. The filtered gas then enters the upper box to the clean gas collection pipe - exhaust duct, and is discharged into the atmosphere by the exhaust fan. The ash cleaning process involves first cutting off the clean air outlet duct of this chamber to ensure that the filter bags in this chamber are in a state without air flow passing through (compartmental-by-compartment air stoppage ash cleaning). Then, the pulse valve is opened to use compressed air for pulse jet cleaning. The shut-off valve is closed for a long time to ensure that the dust stripped from the filter bags settles in the ash hopper after the jet cleaning, avoiding the phenomenon that the dust, after being detached from the surface of the filter bags, adheres to the surface of adjacent filter bags with the airflow. This ensures thorough cleaning of the filter bags and is fully automatically controlled by a programmable controller for the exhaust valve, pulse valve, and ash discharge valve, etc. The dusty gas enters through the air inlet. When passing through the ash hopper, some large particles of dust in the gas are separated under the action of inertial force and gravity and directly fall to the bottom of the ash hopper. The dusty gas passes through the ash hopper and then enters the filter bag filtration area of the middle box. The gas passes through the filter bags, and the dust is retained on the outer surface of the filter bags. The purified gas enters the upper box through the filter bag opening and is then discharged from the air outlet.