It is suitable for purifying dust with weak hydrophilicity, such as silica and clay, but it can't be used for purifying hydraulic dust such as lime, dolomite and clinker, so as not to block the sieve holes.
The flow rate of the dust collector should be controlled within 2 ~ 3m/s, and excessive wind speed will easily lead to water entrainment, which will affect the dust removal efficiency. The dust removal efficiency of foam dust collector is 90% ~ 93%. After adding plastic balls or pebbles to the foam board, the purification efficiency can be further improved, but the equipment resistance increases.
Working principle:
It is mainly composed of sieve plate covered with sieve holes, spray pipe, top water plate (also known as demister), water seal sewage valve and inlet and outlet. Dust-laden flue gas enters the cylinder from the lower side, and the airflow turns sharply upward, which reduces the settling speed. Coarse dust is thrown out under the action of inertial force, collides with water drops falling on the porous sieve plate, and is discharged by the water mask, and fine dust rises with the airflow.
When passing through the porous sieve, the water layer on the sieve plate is blown into a turbulent boiling foam layer, which increases the contact area between gas and water droplets, so most of the dust is washed away by water. Dust is discharged into the sedimentation tank from the bottom cone with sewage through the water seal. The purified flue gas is discharged through the upper water baffle.