What impact does graphite on the top of the carbonization chamber have on coking? ?
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I have a small question for you seniors. During the coking process of the coke oven, what impact does the graphite on the roof and walls of the coke oven have on the furnace body and coking of the coke oven? Please give me your advice. Thank you very much.
Graphite on the top of the furnace will affect the extension of the coal leveling rod, thus affecting the quality of the leveling coal. Graphite on the furnace wall will increase the coke pushing current, causing high current and even generating double coke. The old coke oven of our factory is 2007 years old * * It was scorched twice and burned nine times, and only once was caused by the wear and tear of the hearth bricks. Most of the rest are caused by the furnace wall graphite not being cleaned in time.
Severe graphite formation on the top and walls of the furnace will cause excessive pressure in the carbonization chamber, especially in single-gas-collecting coke ovens where smoke from the furnace door is particularly serious. On the other hand, it will make it difficult to push the coke. Whether it is raw or overcooked, the top will rise as soon as you push it. In severe cases, the top brick will be lifted.
A small amount of graphite is good for the furnace body, as it can increase sealing and reduce cross-leakage, but too much graphite can cause many hazards. 1. Reduce the space used in the carbonization chamber and reduce coal loading. 2. It hinders the circulation of gas, causing the furnace body to smoke, causing the gas to stay for too long, and forming a vicious cycle. 3. It affects the operation of pushing coke and loading coal. In severe cases, it may cause coal collapse or difficulty in pushing coke, or even damage the furnace wall.
Everyone has talked about the dangers of graphite forming in the carbonization chamber. The reason may be: 1. The carbonization chamber is heated unevenly, mainly in the high direction. ； 2. Poor gas export ； 3. The temperature of the furnace top space is too high. Treatment measures: 1. Strengthen thermal management and do a good job in temperature measurement and adjustment ； 2. Pay close attention to changes in the pressure of the gas collecting pipe. If necessary, adjust the suction in front of the primary cooler to shorten the reaction time of the automatic adjustment flap of the gas collecting pipe pressure and speed up the export of waste gas. ； 3. Appropriately increase the air excess coefficient and reduce the temperature of the furnace top space as much as possible ； 4. Slightly extend the burning time of the empty furnace, and try to use compressed air to burn if necessary. ； 5. If the coke cake is difficult to push, adjust the proportion in time and use less coal with high expansion pressure. ； During the coke pushing operation, the coke pushing operation should be carried out in a dynamic manner, and attention should be paid to the changes in the coke pushing current to reduce damage to the furnace body. The above is for reference.
Replenish: Coal must be loaded in order and coal leveling operations must be done well.
Increase the cleaning of graphite to clean the furnace.
During the coking process of the coke oven, the formation of graphite on the roof and walls of the coke oven has both advantages and disadvantages for the body of the coke oven. A small amount of appropriate graphite is good for the tightness of the carbonization chamber, and sometimes it is necessary to let it expand. Of course if it is too much or too thick, it will have an impact, as the experts on the floors above have said. .
Can the commenter take the quantity into consideration, the area, thickness, location, etc. of the graphite? The one above is too general, a textbook.