How to increase the burner temperature?

Increase the size of side fire channel gas nozzles

1. Adjustment of the burner fire channel adjustment brick and the coke oven gas nozzle. For down-jet coke ovens heated by coke oven gas, by adjusting the small orifice plate to increase the hole diameter of the burner fire channel orifice plate, the amount of burner fire channel gas can be increased, thereby increasing the heat supply of the burner fire channel. For coke ovens heated by blast furnace gas, adjust the beef tongue brick to increase the gas chute section of the burner fire channel to increase the heat supply of the burner burner channel. 2. Heat dissipation control at the coke oven head. The coke oven head, the iron parts protecting the furnace and the front wall of the regenerator are the boundaries of the coke oven. Its outer surface is in direct contact with the outside cold air to form convection heat dissipation and radiation heat dissipation. This is the main reason for the low temperature of the coke oven head. Insulation materials can be added or replaced in the thermal insulation parts, especially the regenerator. .Strengthen operation management, control the time to open the furnace door, shorten the time to open the furnace door, and reduce the heat loss at the furnace head. 3. The adjustment of the suction at the top of the regenerator ensures a reasonable pressure system, which is conducive to increasing the temperature of the burner head. That is, on the premise of maintaining a small α value (complete combustion is required), use a smaller suction force and a slightly larger air inlet to increase the static pressure of the burner head, thereby increasing the temperature of the burner head. 4. Tight protection of the masonry If the coke oven masonry is not tight, when a lot of cold air leaks in, on the one hand, it increases the heat load of the furnace head. On the other hand, the leaked air burns with the gas in the regenerator, reducing the calorific value of the gas, thereby lowering the temperature of the furnace head. Therefore, the two forks of the small flue, the sealing wall of the regenerator, and the front of the ramp entrance must be tightly jointed. When coke oven gas is used for heating, in order to prevent leakage from affecting the furnace head temperature, it is required to regularly spray grout on the brick gas channel. 5. Increase the mixing ratio. The mixing ratio increases and the gas volume distribution in the rear fire channel is relatively larger (h2 increases), thereby increasing the burner temperature. 6. Intermittent heating: When the coking time is 32 hours, the heating parameters such as gas flow and flue suction are still used with the coking time of 20 hours. In one exchange, 1/3 of the time does not supply gas and the heating is stopped. This method can be used when the coking time is too long and can also maintain the burner temperature above 1000°C. 7. When burning blast furnace gas, a burner can be added for supplementary heating if conditions permit. 8. When the coking time is too long, a relatively high standard temperature is established to ensure that the furnace temperature is above 1000°C. besides: http://bbs.hcbbs.com/viewthread.php?tid=339030&highlight=%C2%AF%CD%B7 http://bbs.hcbbs.com/viewthread.php?tid=142896&highlight=%C2%AF%CD%B7 This post was last edited by 26722672 on 2009-3-26 20:37 ]

1. Methods to increase the gas and air volume of the edge fire channel: When heating with coke oven gas, the coking time of the down-jet coke oven is shorter than 24 hours. The method of increasing the diameter of the side fire nozzle can be used to increase the gas volume. However, it will not be significant when the coking time is extended. The method of reducing the diameter of the middle nozzle should be used to increase the side fire channel gas volume. If the coking time changes frequently and the normal coking time can be restored quickly, the method of adding iron wire to the middle fire channel nozzle is generally used to increase the side fire channel temperature. After the gas volume of the side fire channel increases, in order to ensure normal combustion, the air coefficient can be appropriately increased. At this time, the air coefficient of the central fire channel would rather be larger. This will also help prevent the temperature of the small flue from decreasing. The side-entry coke oven can increase the temperature of the side fire channel by adding brick orifice plates in the horizontal brick gas channels, such as adding brick orifice plates between the 2-3 and 26-27 fire channels. The diameter of the brick orifice plate is about 30% of the diameter of the brick gas channel. When using blast furnace gas for heating, in order to increase the temperature of the side fire channel, a brick block can be added to the small flue. However, the disadvantage of this method is that it is difficult to install and has a bad impact on the downdraft. You can also use the method of reducing the suction force of the rising airflow at the top, which can reduce the suction force by 5-10Pa. This can increase the air volume of several side fire channels, thereby increasing the temperature of the side fire channels. This means that the pressure of the fire hole will also increase by 5-10Pa. When blast furnace gas is used for heating, the effect of adding coke oven gas to the side fire channel to increase the temperature of the side fire channel is more obvious. The control of the air coefficient can be increased to achieve complete combustion in each fire channel. 2. Gun crack repair on the burner head and sealing of the regenerator. After the coking time is prolonged, the temperature drop and the reduction of graphite on the furnace head wall will increase the loss of raw gas, which will worsen the combustion state of the gas in the side fire channel. Therefore, the method of gunning must be used to seal the furnace wall to reduce the loss of raw gas, improve the combustion state of the side fire surface, and increase the temperature of the side fire channel. Due to the loose tightness of the regenerator, the front of the chute, and the socket of the small flue, the heating of the side fire channel is also deteriorated. The sealing work of these parts is very necessary to improve the heating of the side fire channel, especially when heating the blast furnace gas. 3. Gas pressure control. Due to the prolongation of coking time, the amount of heating gas is reduced, so the gas pressure will inevitably decrease. In order to maintain normal gas pressure, it must be replaced with a small-diameter orifice plate. The hole diameter of the orifice plate should be determined by calculation depending on the extent of extending the coking time. When the coking time is long and the amount of gas is small, the number management method can be used, that is, sufficient gas is supplied to the furnaces in the coking stage, and less gas is supplied to the furnaces in the stewing stage. However, this method is very complicated in management. It is necessary to make identification marks and operation management records to grasp dynamic changes, etc., to avoid causing high and low temperatures. 4. Monitoring of gas collecting pipe pressure and temperature. After the coking time is prolonged, the gas collection pressure decreases and fluctuates greatly due to the small amount of gas generated and the long interval between furnace discharges. In order to reduce the fluctuation of the gas collecting pipe pressure and effectively maintain the gas collecting pipe pressure, the gas circulation volume of the large circulation pipe of the blast condensation system can be adjusted, and the operational connection between the gas collecting pipe and the blower can be strengthened. The temperature of the gas collecting pipe should be maintained at 80--100ºC, and the ammonia pressure should be controlled to maintain temperature stability. In order to maintain a not too low ammonia water pressure to ensure the spraying state of ammonia water in the bridge pipe, when the temperature of the gas collecting pipe is low, the spraying of the gas collecting pipe can be partially or completely closed. 5. Formulation of focus push plan. When the coking time is extended, the number of times of blasting is reduced. If the coking is arranged according to the original number of inspections, it will inevitably cause the inspection time to be too long and the gas generation amount to be uneven. Therefore, it is necessary to rearrange the number of inspections and arrange a coke pushing plan that is consistent with extended coking time. Its organizing principle is: ①The operating time of each furnace should not be too long to avoid damage to the furnace body due to the furnace door being left open for too long. ； ②It is evenly discharged from the furnace to make the amount of gas generated even and stabilize the gas collecting pipe pressure.