The new type of pipe-type liquid distributor is most suitable for the flotation of coal slime by jet aeration and cone bucket tail flotation columns. A main pipe and several branch pipes connected to the main pipe are arranged in parallel in the inner circle of the flotation column cylinder, forming a circle, perpendicular to the main pipe, coplanar and connected. One end of each branch pipe is symmetrically connected to the main pipe, and the other end is blocked; one end of the main pipe is provided with a main pipe joint passing through the flotation column cylinder, and the other end is blocked; the lower part of the branch pipes arranged in parallel along the inner circle of the flotation column cylinder is provided with several liquid outlets symmetrically forming an angle α with the median vertical line. It can evenly distribute gas on the cross section of the flotation column, and the gas distribution effect is better than that of the tangential pipe bubble distributor, and will not be reduced due to the increase of the diameter of the flotation column, so it can improve the flotation efficiency. It has a compact structure, is easy to implement, has good working effect, and has wide practicality.

The structure of the tube-type liquid distributor: The tubes (pressure type and gravity type) distribute the liquid evenly, the structure is simple, easy to support, small space in the tower, large airflow channel, small operation flexibility, limited to 2:1 range, too large flow rate will increase the pressure drop of liquid perforation, resulting in the generation of mist and splash, too small will make some distribution points dry. The gravity type can reach 4:1, it can be used as direct distribution, and can also be used for pre-distribution of other forms of distributors. The use of tower diameter is limited, and it is currently a widely used distributor. It has the following characteristics:

1. The liquid distribution performance is excellent, suitable for occasions with more spray points and lower liquid loads.

2. It is required that there are no solid particles in the material, and a filter screen should be installed at the feed port of the riser.

3. The tube-type liquid distributor has good operation flexibility.

4. In the case of high operation flexibility, a double-row tube liquid distributor can be used.

5. Suitable for large, medium and small towers