What are the two parts of the material circulation process in circulating fluidized bed boilers? How to prevent the impact of water cooling wall wear

　　Circulating fluidized bed boiler we usually also into it for cfb boiler, generally in the thermal power industry and paper industry is more widely used. Especially with the intensification of environmental protection policy, circulating fluidized bed boiler is gradually replacing the traditional pulverized coal furnace. Today we will talk to you about the circulating fluidized bed boiler material circulation process includes which two parts? How to prevent the impact of water cooling wall wear.

　　First of all, we have to figure out what kind of material circulation process of circulating fluidized bed boiler is. The material circulation process of circulating fluidized bed boiler can be divided into two parts: inner circulation and outer circulation. The terminal velocity is greater than the apparent velocity of particles and terminal velocity is less than the apparent velocity of particles constantly collide with each other to form particle clusters, in the process of gas-solid two-phase flow up, particle clusters one after another along the four walls of the chamber back to the lower bed of the furnace, this process is called internal circulation. The particles and particle clusters carried out by the flue gas in the form of lifting and entrainment enter the separator, and the separated particles return to the furnace chamber through the return leg and return valve, which is called the external circulation.

　　We then talk about why circulating fluidized bed boilers to do water-cooled wall anti-wear, because of the special nature of circulating fluidized bed, in its operation, there is a large number of high-speed movement of material particles in the furnace chamber on the water-cooled wall for continuous scouring and cutting. Over time, the water-cooled wall will appear wear and tear rupture now, serious wear will directly lead to boiler leakage burst tube to the enterprise caused huge losses, so circulating fluidized bed boiler must do a good job of anti-wear treatment, timely prevention of water-cooled wall wear.

　　Circulating fluidized bed boiler water-cooled wall wear is a common problem, but also a headache for enterprises. In order to help the use of circulating fluidized bed boiler water-cooled wall wear problem, grating anti-wear was introduced and widely promoted and applied. The emergence of grating anti-wear has completely broken the problem of circulating fluidized bed boiler water-cooled wall that cannot be cured. At present, this technology is widely used and promoted at home and abroad because of its excellent anti-wear effect.