Fluidized bed boilers generally require 0-10mm, some 0-13mm. In general, 2-10mm accounts for 90%. The ultra-fine particle size makes the boiler bed temperature low, the ash discharge is much, the boiler wear is large, and the low-temperature coking tendency is obvious. The furnace bed temperature of coarse particles is high and the fluidization effect is poor.

1、 Cross screen ---- it is strongly recommended to replace spiral screen

1. Technical features:

This series of cross screens is a patented product of our company, which is specially designed for screening wet, easy to block and fine-grained materials. This technology solves the problems of easy blocking and low screening efficiency of the existing fine-grained (less than 10mm) material screening equipment in China. It is especially suitable for screening high moisture coal in South China.

① Unique screening mechanism: the materials are continuously transported on the screen shaft rotating in the same direction, and the materials smaller than the screen gap pass through the screen through the screen gap.

② The screening efficiency reaches more than 90%, which is unmatched by any screening equipment at present.

----The unique movement form of the screen has the function of forced discharge of qualified particles.

---An automatic cleaning device is installed under the screen shaft. When the machine is running, the materials adhered to the screen can be cleaned all the time, and the opening rate can be maintained at 100%.

③ The screen shaft is driven by one-to-one single shaft, so that each shaft has a high load probability coefficient. Any shaft failure will not affect the operation of the whole machine.

④ The materials are arranged in equal thickness on the screen surface to facilitate uniform material dispersion and improve the screening rate.

⑤ The rotation speed of the cross screen shaft is low, stable and noise free. Reliable and durable.

⑥ The screen piece is fixed with the key on the roller and the sleeve. After the screen piece is worn, it can be easily removed and replaced.

⑦ The installation size of the machine body is small and the occupied space is small.

⑧ The machine is fully sealed without dust.

2. Performance comparison between cross screen and spiral screen

The screen surface of the spiral screen is composed of a group of parallel spiral shafts. Threads are processed on the spiral shaft, and the materials under the screen are obtained by the screen hole formed by the spiral rib and the spiral groove on the adjacent shaft. The material entering the screen surface is pushed forward by the rib on the screw.