First, the introduction

The low pressure long bag pulse bag filter is a dry filter device. Suitable for capturing fine, dry, non-fibrous dust. Suitable for iron and steel smelting. Metallurgy, chemical, electronics, building materials, cement industry, musical instrument processing, carbon processing, mechanical processing, various industrial electric furnaces, asphalt concrete mixing plants, mining, casting, electric power, rubber, pharmaceutical, food Processing, military, ceramics, light industry, various dryers, non-metallic minerals, fine powder deep processing, sandblasting, refractory materials and other industrial air pollution enterprises.

Second, the working principle

The dust-laden gas enters the inlet flue pipe of the bag filter and is filtered by the manual regulating valve from the lower part into the filter area of the dust collector. When the flue gas passes through the filter bag, the dust is retained on the outer surface of the filter bag, and the purified flue gas The filter bag enters the clean room and is discharged by the air outlet flue. The dust is retained by the filter bag. As the filter bag retains dust, the filtration resistance of the filter bag will increase. The electric control system performs pulse jet cleaning according to the set control program, and the cleared dust is collected in the dust. The bucket is discharged into the lower level ash conveying system by the ash discharging valve. The pulse dust collector automatically repeats the control program during the operation to ensure that the dusty flue gas reaches the standard discharge.

Third, the structure characteristics of the dust collector

Considering that the use of high pressure blowing will have an adverse effect on the service life of the filter bag, and the dust layer attached to the filter bag will be completely dissipated, which is not only harmful to the dust falling into the ash bucket by its own gravity, but also easy to cause dust. Secondary adsorption. Therefore, the low-pressure pulse bag filter is cleaned at a lower pressure, which not only achieves the desired cleaning effect, but also shortens the time for the dust to fall into the ash bucket. It can avoid secondary adsorption and shortened service life of filter bags due to frequent cleaning.

In order to ensure that the cleaning is more complete and effective, we set up a pneumatic poppet valve at the outlet of each unit compartment to ensure that each compartment is cut off separately.

The pneumatic poppet valve adopts a pneumatic thin plate quick-opening structure, and the whole opening and closing process is linear motion, and the auxiliary guiding is used for accurate positioning, thereby avoiding the phenomenon that the rotating structure is prone to high failure rate in a high temperature state.

With the pneumatic poppet valve closing and air inlet manually adjusting the damper closing, the current warehouse compartment changing and other maintenance and repair work can be realized, and other work is performed outside the machine, which can realize non-stop maintenance.

It uses the treated compressed air to induce the net air of the upper box to be instantaneously sprayed into the inner tube of the filter bag to form a pulse jitter, and the dust adhered to the outer surface of the filter bag suddenly falls out of the filter bag and falls off the filter bag. In the ash bucket.

Our company uses a live connection in the nozzle connection, and the adjustable spray head is absolutely perpendicular to the inner barrel of the filter bag.

According to the characteristics of the dust collector, advanced online detection and monitoring equipment such as flue gas temperature, dust collector operating pressure detection, material level detection and operation equipment fault detection are set.

The use of PLC programmable controller ensures the automation of the dust collector as the main operating equipment of the demander.