Sub-center tube

Center for the current circulating fluidized bed boiler tube in general in two ways: First, by using Cr25Ni20 stainless steel plate rolling, and second, in whole or in sub-casting style. The center of heat-resistant stainless steel rolling cylinder during use, easy to deformation, so that a serious decline in separation efficiency of the boiler. Also, due to the upper hanging bars strong enough, the center tube easy to deflect or loss, resulting in security, economic production was seriously affected.
I have developed casting center tube structure with a distinctive way of material is used by our company independently developed by GM-9, GM-10, the HRC hardness of 30 or more materials, high strength, weldability, corrosion resistance, non - creep, do not crack, will not expand the use of deformed guaranteed service life 3 to 5 years. Due to high hardness, its wear resistance far superior to Cr25Ni20 material. Relatively superior heat resistance, heat-resistant temperature is higher than 1250 .
According to manufacturer requirements, can produce modular or monolithic center tube to reduce the number of castable damage, saving companies the cost of production.

At present, the center tube of the performance of our company is more extensive and the minimum fluidized bed furnace is 35 tons of the central cylinder, the largest fluidized bed furnace is 1025 tons the center of cylinder.


Combined central cylinder advantages: current central cylinder in the course of deformation of the upper part of easy damage, easy to wear and tear damage to the bottom, if the overall change is a waste of material added to the cost, but also more difficult to replace. Combined casting center is divided into upper and lower cylinder 2 ~ 3, the moment when you just need to replace the Ministry of damage to the lower part can be, so that not only saves materials has also reduced costs, while also saving time and maintenance costs of human-style.