New anti-wear technology of fluidized bed boiler grille well chain three more anti-wear number intel

CFB circulating fluidized bed coal fired boiler, because of its distinctive combustion efficiency, although it is not optimistic about green environmental protection, but the fluidized bed boiler for the flexible control of discharge, promote the use of stable development trend.

In circulating system, many fluidized bed boilers will burn a lot of gangue (about 74%) and some long-flame coal (about 26%). The calorific value of mixed coal is about 1500Kcal/kg, and the ash content is about 65%, which belongs to low calorific value, high ash content, large particulate matter and high toughness natural material. How to ensure its stable combustion and burnout is the key problem.

For coal gangue in terms of circulation fluidized bed boiler, the likelihood is expected to vest in low calorific value, high ash, large particles and high toughness material, having high ash melting point, the combustion instability, burning a lot of problem, the current circulation fluidized bed boiler water-cooled heat and steam cooling is cyclone, inside the cyclone occurred secondary combustion plays a cooling effect, Therefore, it has a bad effect on the burning out of coal gangue. At the same time, the coal gangue particles, whether the slag particles after sufficient combustion or the particles without sufficient combustion, are very strong. In view of the damage of the water-wall pipe in the heating furnace, all of them are very serious. In order to take into account the stability and safety of operation, it is necessary to take into account the anti-wear problem of the water-wall.

Since 2004, the technical elite team has been gradually practicing the anti-wear problem of the water wall of the circulating fluidized bed coal-fired boiler step by step, from the heat resistance of commodity raw materials to the discussion of the gas-solid two-phase flow field in the furnace. The processing technology has been upgraded, innovated and updated seven times, and more than 50 times of minor renovation and transformation. Finally produce more scientific research careful and meticulous "three more" anti-wear number of intelligent technology. Ensure that the water wall pipe of circulating fluidized bed coal fired boiler is damaged. The thinning of the water wall pipe of circulating fluidized bed coal fired boiler is below 0.1 mm this year, which completely eliminates the headache and difficulty of serious damage of the water wall pipe of circulating fluidized bed coal fired boiler.