Classification of wet dust collector
2020-03-12
wet dust collectorThere are many kinds, and there is no good classification method now. It can be roughly divided into low resistance and high resistance. The normal low resistance is 25150mmThe water column is included in simple spray towers and wet cyclones, regular the measurement of water consumption is generally in.0.4-0.8kg/Cubic meters, but the dust is too big10umWhen the dust removal efficiency exceeds90-95%. This kind of dust collector is generally used in burning furnaces, fertilizer plants, lime cellars and iron casting plants and so on. High resistance dust removal rate up99.5%above, the resistance loss is normal in250-875mmWater column. The dust collector is used in ore crushing, steel furnace and cupola flue gas purification place, in these dust particles <0.25um.
According to the structure, it has several categories:
1. Gravity Spraywet dust collector, such as spray scrubbers. Simplewet dust collectorWater is sprayed from top to bottom. Dust-containing gas flows upward in order to make the air flow evenly distributed on the load surface of the tower. Sometimes, the air flow passes through an orifice plate or a thin filter layer. However, when the airflow speed is high, the top of the tower will be added with a water baffle. Spray droplet size will also greatly affect the dust removal efficiency.
2. The cyclone type is an improved gravity spray tower, which makes the dust-containing airflow enter the tower in a tangential direction from below the tower, and greatly improves the efficiency of dust removal. The dust in the rotating airflow is separated under the action of centrifugal force, and the separated dust is captured by the liquid flow to the vessel wall.
3. Foam type, dust-containing gas enters the cylinder from below, the air flow turns upward sharply, and the flow rate is reduced. Larger dust is taken out under the action of inertia, meets with the water droplets falling from the porous sieve plate, and is taken to the water for discharge. When the finer dust goes up with the air flow and passes through the porous sieve plate, it will blow the water layer on the sieve plate into a boiling foam layer, then the contact between the gas and the water droplets is increased, so that most of the dust will be washed off. Sewage is discharged from the bottom to the sedimentation tank through the water seal, and the purified gas is also discharged through the water baffle above.
4, self-excited, from the water flow into water mist requires energy, in the wet dust collector in this energy is consumed in the spray nozzle of the potential energy or by the gas directly impact the water surface of the kinetic energy. The self-excited water mist dust collector is the latter, which relies on the dust-containing airflow itself to stir up waves and water mist to achieve the purpose of dust removal.
5, Venturi wet dust collector, dust removal principle is mainly inertial collision. High dust removal efficiency, yes5micron dust efficiency is99.6%And the loss of dust resistance is quite large.
6. Packing wet dust collector.
7. Mechanical induced dust collector.
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