What should I do if the over-burning rate of raw meal combustion in gas lime kiln is too high?

How to burn raw gas lime kiln? Linzhou Modern Lime Kiln Technology Research Institute often uses the burner to send gas and air into the kiln to form a flame to burn, calcine limestone to make it react into lime, and burn the lime kiln with raw gas. The temperature in the kiln is heated by the flame produced by the mixing of gas and oxygen in the burner, but its heating mode and heating environment are different from those of ordinary kiln burners. The flame of ordinary furnace burner burns in space, while the flame of lime kiln burner burns in a kiln filled with limestone. The flame of ordinary kiln burner has no resistance, but the flame of lime kiln burner has to overcome the resistance of limestone and burn in every crack of limestone. The ideal combustion of ordinary burner is that the combustion gas can be fully burned as soon as it comes out of the burner mouth, but the burner of gas-fired lime kiln can not be fully burned as soon as it comes out of the burner mouth, which is one of the main reasons why some gas-fired lime kilns are ignored at present. When the gas is fully mixed in the burner, it forms a flame as soon as it comes out, and all the heat is released, which leads to the excessive temperature around the burner. Especially natural gas, coke oven gas, calcium carbide tail gas and other high calorific value gases, it is easy to form sintering and nodulation at the burner mouth. The so-called sintering refers to the liquefaction and crust of limestone surface, and the nodulation refers to that the sintered limestone sticks together or forms small balls or sticks to the kiln wall. This situation seems to have gone too far. In fact, it will look very raw after being burnt. The reason is that after sintering, the carbon dioxide inside the outer surface of limestone can't be released, and limestone can't be calcined into lime at high temperature, which means that the sinter blocks the flame in the front area of the burner and can't get in at all. Therefore, the burner of lime kiln should not only make the gas generate enough heat, but also exert heat on a certain section. As an operator, it is difficult to grasp the burning area of flame, because the burning area is determined by the burner itself. Therefore, when designing and manufacturing a burner, it is necessary to master the calorific value and composition of the gas used and the combustion characteristics of the gas, so as to determine the structural size of the burner. For the burner, the tiny size has a great influence on the combustion effect. Because of experience, low calorific value gas is mostly mixed internally, and high quality gas is mostly mixed externally. Linzhou Modern Lime Kiln Technology Research Institute has gained good experience in the research and development of burner nozzles, and the "long flame burner" developed in recent years has won the national practical technology patent. Although burner technology is very important, material is also a key. Because the burner works in high temperature area and easy wear area, it must have high temperature resistance and wear resistance. The front of the burner produced by Linzhou Modern Lime Kiln Technology Research Institute adopts a protective sleeve made of chromium-nickel alloy material. Because the life of burner determines the life of kiln lining to a certain extent, the life of kiln lining determines the production efficiency and cost of kiln. The arrangement of burners on the kiln is also very important, of course, in the calcination area, but the calcination area of the kiln is related to the overall structure of the kiln body design. If the calcination area is high, the preheating area will be shortened and the height of the cooling area will be reduced. Generally speaking, the burner technology of lime kiln is very important to the production efficiency and effect of gas lime kiln.