The burner is the key component of the gas-fired lime kiln. The burner of the gas-fired lime kiln is different from the burner of the ordinary heating furnace. Burning in a kiln full of limestone, the flame of the burner of the ordinary heating furnace has no resistance, but the flame of the burner of the lime kiln is to overcome the resistance of the limestone and burn in the gaps of the limestone.
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The ideal combustion of ordinary burners is that the combustion gas can be fully burned as soon as it exits the burner port, but the burner of the gas-fired lime kiln cannot be fully burned as soon as it exits the burner port. This is also one of the main reasons why some gas-fired lime kilns have neglected raw burning and over-burning.
The gas is fully mixed in the burner, and as soon as it exits, a flame is formed and all the heat is released, which causes the temperature around the burner to be too high. Especially high calorific value gases such as natural gas, coke oven gas, and calcium carbide tail gas are easy to form sintering and nodules at the burner port. Pellets or bonded to the kiln wall.
This situation appears to be overburning on the surface, but in fact it is the raw burning that occurs at the same time as the overburning occurs. The reason is that after sintering, the carbon dioxide inside the outer shell of the limestone cannot be released, and no matter how large and high the calorie is, the limestone cannot be calcined into lime. Besides, the "sintered" material blocks the flame in the front area of the burner, and the flame will not be released at all. Can't get in. Therefore, the lime kiln burner should not only make the gas burn well, but also exert ideal heat in the set section. As an operator, he only has the means to adjust the gas volume and pressure, but it is difficult to grasp the burning area of the flame, because the burning area is determined by the burner itself, so the design and manufacture of the burner must master the calorific value and composition of the gas used, and at the same time understand the gas character of burning flame. In order to determine the structure size of the burner burner. For the burner burner, the very small structural size will have a great influence on the combustion effect.
According to experience, the gas with low calorific value mostly adopts the internal mixing type, and the high calorific value gas mostly adopts the external mixing type. Linzhou Modern Lime Kiln Technology Research Institute has achieved good experience and achievements in the research and development of burner burners in recent years. The "long flame burner" developed by the company won the national utility model technology patent in 2009. The process technology of the burner is important, but at the same time, the material is also the key. Because the burner burner works in the high-temperature area and the easy-wear area, it must have high temperature resistance and wear resistance. The front part of the burner developed and produced by Linzhou Modern Lime Kiln Technology Research Institute adopts the burner protective cover made of chrome-nickel alloy material that is resistant to high temperature and damage. Because the life of the burner determines the life of the kiln lining to a certain extent, and the life of the kiln lining determines the production efficiency and cost of the kiln. The placement of the burners on the kiln is equally important. The installation position of the burner burner is of course in the calcination area, but the calcination area of the kiln is related to the overall design process and structure of the kiln body, but it is not absolutely in the middle of the kiln body. If the calcination zone is on the upper side, the preheating zone will be shortened, which will affect the calcination speed and output, and on the lower side, the height of the cooling zone will be reduced. If the cooling zone is not good, red ash will be produced and a lot of heat in the kiln will be taken away.
All in all, the performance of the lime kiln burner is very important to the production efficiency and effect of the gas-fired lime kiln, and it should be highly valued in the design, construction, maintenance and repair of the lime kiln.
The burner is the key component of the gas-fired lime kiln. The burner of the gas-fired lime kiln is different from the burner of the ordinary heating furnace. Burning in a kiln full of limestone, the flame of the burner of the ordinary heating furnace has no resistance, but the flame of the burner of the lime kiln is to overcome the resistance of the limestone and burn in the gaps of the limestone.
the
The ideal combustion of ordinary burners is that the combustion gas can be fully burned as soon as it exits the burner port, but the burner of the gas-fired lime kiln cannot be fully burned as soon as it exits the burner port. This is also one of the main reasons why some gas-fired lime kilns have neglected raw burning and over-burning.
The gas is fully mixed in the burner, and as soon as it exits, a flame is formed and all the heat is released, which causes the temperature around the burner to be too high. Especially high calorific value gases such as natural gas, coke oven gas, and calcium carbide tail gas are easy to form sintering and nodules at the burner port. Pellets or bonded to the kiln wall.
This situation appears to be overburning on the surface, but in fact it is the raw burning that occurs at the same time as the overburning occurs. The reason is that after sintering, the carbon dioxide inside the outer shell of the limestone cannot be released, and no matter how large and high the calorie is, the limestone cannot be calcined into lime. Besides, the "sintered" material blocks the flame in the front area of the burner, and the flame will not be released at all. Can't get in. Therefore, the lime kiln burner should not only make the gas burn well, but also exert ideal heat in the set section. As an operator, he only has the means to adjust the gas volume and pressure, but it is difficult to grasp the burning area of the flame, because the burning area is determined by the burner itself, so the design and manufacture of the burner must master the calorific value and composition of the gas used, and at the same time understand the gas character of burning flame. In order to determine the structure size of the burner burner. For the burner burner, the very small structural size will have a great influence on the combustion effect.
According to experience, the gas with low calorific value mostly adopts the internal mixing type, and the high calorific value gas mostly adopts the external mixing type. Linzhou Modern Lime Kiln Technology Research Institute has achieved good experience and achievements in the research and development of burner burners in recent years. The "long flame burner" developed by the company won the national utility model technology patent in 2009. The process technology of the burner is important, but at the same time, the material is also the key. Because the burner burner works in the high-temperature area and the easy-wear area, it must have high temperature resistance and wear resistance. The front part of the burner developed and produced by Linzhou Modern Lime Kiln Technology Research Institute adopts the burner protective cover made of chrome-nickel alloy material that is resistant to high temperature and damage. Because the life of the burner determines the life of the kiln lining to a certain extent, and the life of the kiln lining determines the production efficiency and cost of the kiln. The placement of the burners on the kiln is equally important. The installation position of the burner burner is of course in the calcination area, but the calcination area of the kiln is related to the overall design process and structure of the kiln body, but it is not absolutely in the middle of the kiln body. If the calcination zone is on the upper side, the preheating zone will be shortened, which will affect the calcination speed and output, and on the lower side, the height of the cooling zone will be reduced. If the cooling zone is not good, red ash will be produced and a lot of heat in the kiln will be taken away.
All in all, the performance of the lime kiln burner is very important to the production efficiency and effect of the gas-fired lime kiln, and it should be highly valued in the design, construction, maintenance and repair of the lime kiln.