Upward draft bin pump used in power plant fly ash conveying

Upward draft bin pump used in power plant fly ash conveying

Fly ash used in power plants due to its light specific gravity, particle range distribution is not large, so the use of Upward draft bin pump more. At the same time, due to the flexible and convenient arrangement of Upward draft bin pump, ash bucket discharge channel is smooth, so the power plant in the pneumatic conveying system of fly ash on the choice of bin pump, the choice of Upward draft bin pump scene more.

Upward draft bin pump, is the use of pneumatic differential pressure principle combined with fluidization technology, the powder in the pump for boiling homogenization, is the top of the pump out of the way of dense phase conveying pneumatic conveying equipment. Commonly used in conveying cement, raw materials, fly ash and other powdery materials. It is well used in cement, metallurgy, electric power and other industries.

Structural characteristics of Upward draft bin pump:

Combined with the advanced conveying technology at home and abroad, it constantly optimizes the structural form of the pump body and the fluidization effect in the pump. Through the redesign of the umbrella-shaped fluidization disk, the single-layer gasification plate (cloth) is changed to multi-layer vortex boiling gasification, so that the powder fluidization in the pump is more uniform and the transport is more stable. Compared with other pneumatic conveying systems, it is characterized by higher concentration and lower flow rate.

Conveying principle:

Upward draft bin pump, the whole conveying is divided into three processes: pump body feeding, fluidization conveying, blowing and clearing the pipe. In the first conveying, open the straight pull type exhaust valve, exhaust the pump air and then open the feed valve, to the material level priority time lag mode, sense the material is full, close the feed valve and exhaust valve, waiting for conveying. In line with the conditions of transport, compressed air into the bottom of the fluidization disk into a multi-layer vortex boiling air flotation, the pump powder fully fluidized and transported. When the pressure in the pump drops to the running pressure of the empty pump, according to the length of the conveying pipe and then delayed blowing to empty the remaining powder in the pipe. Terminal silo through the dust removal device to make the material gas separation, clean air will be discharged into the atmosphere.

Scope of application: 

Upward draft bin pump is suitable for narrow installation space, the ground is not easy to lay pipeline, multiple pumps and pipe conveying and other conditions. The design parameters of pneumatic conveying system should meet:

Conveying equivalent distance ≤1500m;

Vertical height ≤ 50m;

Specific gravity of material accumulation≤7.0t/m3;

Powder fineness ≤5mm;

Material moisture content ≤ 3% (to grasp and release, free fall when not into a ball as a benchmark);

Instantaneous temperature of powder≤200℃.