According to the shape of the cross-section within the spray dust collector, it can be divided into two kinds of round square; according to the different direction of gas-liquid flow within it, it can be divided into three forms: countercurrent, downstream staggered flow.

In the counter-current spray tower, dusty gas the bottom of the spray dust collector into the uniform upward movement through the air distribution grille; droplets sprayed by the nozzle the top down spray, the nozzle can be located in a cross-section, but also can be divided into several layers located in a few cross-section. Because of the inertial collision between the particles droplets, interception cohesion other roles, so that the larger particles are captured by the droplets. After purification of the gas through the tower on the upper part of the anti-mist water baffle, remove the water mist carried out.

Downstream form of spray tower, liquid dusty gas flow in the tower in the same direction, generally the top of the shower down, for the droplets the gas stream separation is favorable, the disadvantage is that the inertial collision effect is poor, mainly used to make the gas cooling humidification processes.

the wrong form of spray tower, that is, the liquid the top of the tower down, dusty gas flow level through the spray tower.

Spray tower scrubber is generally equipped with a collection of liquid pipe slots in the lower part, attached to a sedimentation tank, so that the liquid can be recycled.