CIOT High-Speed Washers
CIOT class washer is a wet direct-flow dust collector. CIOT class high-speed washers are designed to clean contaminated air from wettable dust of various kinds in exhaust ventilation units. The exception is fibrous, cementing dust and condensation aerosols.
Marking of a high-speed washer of the CIOT class
Example of the designation - "CIOT - 6", where:
- "CIOT" - development of the Sverdlovsk Institute of Labor Protection;
- "6" - dust collector number.
Design advantages
Main components of the washer:
- cylindrical part of the housing;
- conical part of the housing;
- unwinder;
- water supply system.
The design difference of the high-speed washer of the CIOT class lies in the specific design of the bottom and the shape of the holes inlet of the medium to be cleaned. They provide the best organization of the water curtain falling from the upper edge of the lower part of the inlet opening. The bottom is a twisted surface in the form of a cone, the apex of which is located on the axis of the washer. The inlet pipe changes its configuration from a circular cross-section to a triangular one. A ledge indicates the border of the wet and dry surfaces of the washer. Sludge is discharged through a drain pipe at the bottom, along an inclined flashing. The cleaned air from the washer exits, bypassing the uncoiler-snail. There is a special valve to regulate the system during adjustment. The inlet/outlet pipes are installed at any angle to each other.
CIOT class washers come in left/right versions. The air movement in the first variant of the washer is carried out counterclockwise, in the second - in the direction of movement.
The productivity in models of washers of the CIOT class varies from 12,500 to 280,000 m3/h, the diameter of the cylindrical part - from 1,344 to 5,400 millimeters. The water pressure before entering the nozzles of the upper zone of the unit should be 1 kgf/m2. The recommended air velocity in the area of the inlet pipe of a circular cross-section varies in the range of 14 ÷ 20 m/s. These washers are used to clean air with an initial content of dust pollution up to 5,000 mg/m3. In high-speed washers of the CIOT class, the efficiency of air purification from particles up to five microns is 95%, particles larger than this size are separated from the air environment by more than 99%.
Operating principle
Pollution is captured by settling them due to the action of centrifugal force on the internal wet walls of the unit, as well as washing the air flow with sprayed water. The main part of the water enters the upper zone of the unit on the water distribution ring using nozzles. It flows down from it, wetting the internal walls of the washer, while the other part enters the lower zone of the unit through the lower nozzle. Water flowing down the walls along with dust enters the bottom - a screw cone. There is a triangular hole between its two halves. An additional air flow enters through it. It captures in the direction of its rotation the water that has fallen into the bottom in the upper part of the cover, from which it slides down onto the air flow entering the washer from above. When it comes into contact with this liquid, it sprays it, carrying it to the center of the unit. The settled suspension enters the drain pipe, the remaining water continues to circulate repeatedly in the unit. This technology allows you to most effectively retain dust inclusions inside the unit, thus preventing them from being emitted with the already cleaned air to the outside. Due to the described effects (centrifugal separation plus irrigation of air with sprayed water), CIOT class washers are more effective in the process of separating fine dust fractions than water film cyclones.
Advantages
The advantage of CIOT class high-speed washers over a CVP class wet film dust collector is that dust contamination is removed by cleaning the space with water.
Field of application
CIOT class high-speed washers are in demand for cleaning dusty air from wettable dust of various types in exhaust ventilation units and aspiration systems. The exceptions are fibrous, cementing dust and condensation aerosols.
Operating features
The CIOT class washer is installed on a metal base. The distance from the floor to the lowest point of the bottom should be two and a half meters. Washers can be installed on the ceilings of industrial buildings. It is recommended to mount them in front of the fan (suction process), while it is imperative to provide water drainage from the lower part of the fan casing.
