I. Overview of waste water purification of water leaching tower: The water leaching tower purification water leaching tower can also be called spray washing tower. The packing layer in the tower is used as a mass transfer equipment for gas-liquid two-phase contact members. The bottom of the packed tower is provided with a packing support plate, and the packing is placed on the support plate in a random manner. Install a packing platen above the packing to prevent it from being blown by the updraft. The spray liquid is sprayed from the top of the tower through the liquid distributor onto the packing and flows down the surface of the packing. The gas is fed from the bottom of the tower, distributed through the gas distribution device, and continuously flows through the gap of the packing layer in a countercurrent flow with the liquid. On the surface of the packing, the gas-liquid two phases are in close contact for mass transfer. When the liquid flows down the packing layer, a wall flow phenomenon sometimes occurs, and the wall flow effect causes the gas-liquid two phases to be unevenly distributed in the packing layer, thereby lowering the mass transfer efficiency. Therefore, the packing layer in the water leaching tower is divided into two sections, and a redistribution device is arranged in the middle, and after being redistributed, it is sprayed onto the lower layer packing. In order to avoid the gas carrying the spray liquid, the gas water separator at the top of the tower effectively traps the spray liquid. The spray liquid is recycled and there will be some loss during use. The circulating water tank at the bottom of the tower is replenished with the spray liquid at the right time. The water leaching tower combined with an alkaline (acidic) additive can not only remove smoke dust but also effectively remove acid mist (alkali mist) in production.
Second, the working principle Under the power of the induced draft fan, the dust-containing flue gas enters the ALC type high-efficiency composite cyclone water film spray flue gas washing and purification tower, and the high-efficiency atomizing nozzle is arranged at the dust gas inlet, and the atomized The dust airflow enters the specially designed cyclone dust collector from the inlet in the tangential direction, and rotates along the wall from top to bottom. The dust particles move to the outer wall under the inertial centrifugal force, and the dust particles reaching the outer wall are combined by airflow and gravity. Falling along the wall surface to the bottom of the dust collector, the dust containing small particles passes through the baffle before entering the foam zone of the dust collector, and the airflow accelerates through the contraction section to impact the liquid surface at the bottom of the dust removal desulfurizer. A part of the coarse particle dust falls directly due to inertia. In the liquid surface, the high-speed impact of the flue gas on the liquid surface forms a large amount of water and water mist, so that the flue gas and the water mist are fully mixed. These water flowers and water mist itself become dust-collecting bodies, and the dust collides with them and is trapped. The very fine flue gas flows along the dust collector to the foam tray under the negative pressure of the fan, and the atomized washing liquid flows to the tray to maintain a certain liquid layer height, and the dust-containing gas flow is guided from the lower part of the tower. Into, evenly through the small holes in the tray to disperse in the liquid stream, while generating a large amount of foam, increasing the contact surface area of ??the gas-liquid two phases, so that the dust particles are trapped by the liquid. At the same time, the water spray sprayed from the spray device forms a uniform water film flowing from the top to the bottom of the outer desulfurization and dust removal chamber wall and the flue gas rising through the foam tray again meets the final desulfurization and dust removal. After the clean gas passes through the dehydration unit, it becomes a clean and dry gas, which is led to the chimney and discharged by the induced draft fan.
