How to maintain a lime kiln? Maintenance methods for various parts of the lime kiln
author: XINTAI
2025-06-19
Hoist system maintenance: Regularly add lubricating oil or grease to the following parts, such as the hoist's bearings, trolley guide wheels, and cables, and check the oil level in the gearbox.
Upper and lower combustion chambers: It is necessary to regularly check whether there is dust on the inner lining near the combustion chamber. If there is, use a compressed air gun to blow it clean. At the beginning, do it at a frequency of once a day, and then carry out maintenance according to the actual situation. On the right side of the lower combustion chamber, there is usually a discharge door, which needs to be cleaned once a day. The sudden temperature rise in the lower combustion chamber is mainly due to the following reasons: increased gas supply, increased calorific value, too small primary air, high degree of limestone calcination, decreased circulating gas flow, reduced driving air, and eccentric injection pipe. There are several reasons for the sudden increase in the temperature of the upper combustion chamber: too little ambient air entering the combustion chamber, too much primary air, and too much air in the lower combustion chamber.
Ejector and circulation pipe: Ash is prone to accumulate inside the ejector. As the accumulated ash increases, the volume inside the ejector decreases, and the volume of circulating gas also reduces, which affects the operation of the kiln. There is a maintenance door on the side of the injector, which is opened once a week to clean the dust on the injection pipe and the dust in the circulating gas channel. Compressed air can also be used for the second sweep. When the flow rate of the driving air and circulating air decreases, dust usually adheres to the nozzle of the injection pipe and should be removed in time. If there is accumulated ash in the ejector or the circulating gas pipe, causing the mixed gas to be eccentric, after cleaning the old ash, a new ejector pipe should be installed.
Replace the filters of the cooling fan and the driving fan regularly.
The heat exchanger is one of the key equipment in the sleeve kiln. However, dust is prone to accumulate inside the heat exchanger. Therefore, it is necessary to regularly inspect the exhaust gas inlet box at the top of the heat exchanger. Dust is likely to accumulate at the pipe opening, resulting in a decrease in exhaust gas flow, an increase in pressure, and the preheating of the driving air failing to reach the designed temperature. If this situation occurs, it should be cleaned promptly. Before cleaning, the heat exchanger should be cooled for 4 to 5 hours. Thermocouples should be replaced in time when they malfunction.
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