Within a certain range, the greater water content of the coal, the greater the dust velocity of its particles. Spray sprinkling dust removal is based on this mechanism to increase the external moisture of coal, increase the moisture of coal and coalescence effect between coal particles. Comparatively speaking, this dust removal method is economical and relatively simple to manage, but it also has many problems: 1.The nozzle orifice of spray sprinkler is small, if the concentration of particles in the surrounding environment is too high or the water quality is not good, the spray sprinkler dust removal system easily be broken down, and the spray sprinkler dust removal system cannot work normally because the nozzle is blocked.
2. It is difficult to effectively control the amount of water sprayed by the sprayer. When sprinkling less water, dust removal effect is not obvious; When the amount of sprinkled water is too much, the conveyor belt is likely to be too wet, causing the belt to slip. When the water content of coal is too much, the viscosity of coal will increase, resulting in the actual output value of coal decreases.
Technical analysis of conveyor cover
In areas with the frequent rainy season, when the belt conveyor is running, rainwater will seep into the materials, increasing the volume of the belt, thus increasing the loss of energy. And the conveyor belt is exposed to the open air for a long time, which will accelerate the aging of the tape, so the upper part of the conveyor needs to install a rainproof cover.
In recent years, the rainproof cover only played a role in preventing rain and didn't take the factors of dust and wind into consideration. For the fully enclosed rainproof cover, there are usually consists of 9 fixed cover and 1 open. These are made of galvanized corrugated steel plate. This kind of conveyor cover and belt are closed, the outside wind is difficult to affect the material. The influence of wind on dust can be ignored. Due to vibration conveyor belt itself or for coal and airlift due to relative motion of dust particles in the process of upward lift, will impact cover, the impact will cover dust particles under the action of force, in the same impact angle conveyor belt movement, repeat several times, because during the process of movement of energy consumption and the influence of gravity particles themselves, make the coal dust particles eventually fall back to the conveyor belt. Some coal dust particles falling along the wall of the raincoat will also fall to the return belt under the action of their own gravity, and a small part will move with the conveyor belt. There is no strong adhesion force between the coal dust particles falling on the return belt and the conveyor belt, so it can be treated uniformly at the turning belt. conveyor cover is easy to install, convenient maintenance and replacement, easy to disassemble.