Measures to increase the burner temperature

What the original poster said is a bit too simple and monotonous; there should be different solutions for different problems

Increasing the orifice size of the burner, expanding the opening of the air damper, and reducing the suction force at the top of the furnace can all raise the burner temperature; the appropriate measures should be taken based on the specific circumstances

1. Strengthen operational management to reduce operation time. This reduces heat loss from the burner area and can also minimize leakage from the burner. 2. Ensure a tight seal around the regenerator walls, as well as at the exhaust gas tray and the front side of the inclined channel. This is to allow more gas to flow to the burner area. 3. Seal the gaps around the wall where the burner is installed. Reduce leakage at the burner tip. 4. Remove graphite from the inclined channel openings and at the burners. Reduce the resistance in the combustion system. However, the four points you mentioned cannot fundamentally solve the problem of low temperatures at the burner area. The burner temperatures in our factory are quite low; we have tried all of the methods mentioned above, with little success. In the end, we increased the size of the orifice plates and reduced the suction force in the smoke ducts, which provided some relief, but it is by no means an ideal solution. Many coking plants in China use an additional heating system for the burner area to provide supplementary heat, but this increases the cost of coking. Yet it is the only viable solution. These are my personal opinions; I’m not sure what others think.

The orifice plate of the burner can be replaced with one for coke oven gas, but what about heating it with blast furnace gas? There are no orifice plates to replace.

Blast furnace gas is regulated by suction, which can be achieved by increasing the gas flow rate or reducing the suction at the top of the vessel.

I have used the method you’re using; it can increase the temperature of the burner. But by increasing the gas volume and reducing the suction, how can the air excess coefficient be maintained? In other words, a large amount of gas was released as exhaust without being burned. It’s not a very good approach. The poster can try removing the adjustment bricks from the two burners of the stove to reduce the resistance in the flue. It can reduce the temperature of the burner.

Increase the cross-tube pressure! Increase the opening of the air inlet to raise the pressure at the viewing hole

Raising the temperature of the furnace tip is a key aspect of coking operations; we are familiar with the basic methods for achieving this, such as enlarging the nozzle at the furnace tip, increasing the area of the air inlet, and reducing the suction force at the top of the furnace. However, it is necessary to analyze each specific situation individually

When our unit installed the adjustment bricks in furnaces 2 and 3, we did not follow the drawings provided by the Coke and Metallurgy Research Institute; instead, we arranged them based on our own experience, as what works best for us is what matters most. For heating with blast furnace gas, in addition to the traditional methods, we also tried another approach: installing baffle bricks in the small flue to reduce the gas flow velocity and increase the amount of gas flowing into the side flue. The results were quite significant.

When burning blast furnace gas, the sealing of the wind wall and the bifurcation areas in the regenerator is extremely important; a low furnace tip is usually caused by air leakage!

Insert 3–5 pieces of No. 1 brick (the number can be determined by you) through the inspection hole in the bifurcation; you can try using one or two different sizes to see which works best. The duration of single-hole operation also has a certain impact on the burner temperature.

When heating blast furnace gas, a small amount of coke gas can be added through the burner, and the air supply to the side flues can be increased appropriately to ensure complete combustion.

1. Replace the tongue-and-groove tiles. 2. Adjust the pressure at the sight glass to the correct level. 3. Heat with another gas pipe.

Let me explain a more detailed method. 1. Method of increasing the amount of gas and air in the side flues: When using coke oven gas for heating, the coking time for bottom-firing coke ovens is less than 24 hours; in this case, increasing the diameter of the nozzles in the side flues can be used to increase the amount of gas supplied. However, when the coking time increases further, this approach yields little effect, and it is then necessary to reduce the diameter of the nozzles in the middle section in order to increase the gas flow in the side flues. When the coking time varies frequently but can return to normal levels quite quickly, it is common to use iron wires in the middle burner nozzles to increase the temperature of the side burners. After increasing the gas flow in the side flues, to ensure normal combustion, the air coefficient can be increased appropriately; in this case, it is preferable to keep the air coefficient in the central flues on the higher side. This also helps to prevent a decrease in the temperature of the small flue. A method to increase the temperature of the side channels in a side-entry coke oven is to install brick orifice plates in the horizontal brick gas channels; for example, such orifice plates can be placed between channels 2–3 and 26–27, with the diameter of these orifice plates being about 30% of the diameter of the brick gas channels. When heating with blast furnace gas, to increase the temperature of the side flues, a method of adding bricks as barriers in the small flues can be employed. However, the disadvantage of this method is that it is difficult to install and has an adverse effect on downward airflow. It is also possible to reduce the suction force generated by the upward airflow; this can lower the suction force by 5–10 Pa. As a result, the air volume in the side burners increases, thereby raising the temperature of those burners. Consequently, the pressure at the observation ports also increases by 5–10 Pa. When using blast furnace gas for heating, the method of supplementing coke oven gas to the side flue yields a more significant effect in raising the temperature of the side flue. The control of the air coefficient can be increased to ensure complete combustion in each flame channel. 2. Spraying repair of burner cracks and sealing of the regenerator area. As the coking time increases, the temperature drops and the amount of graphite decreases on the furnace wall, resulting in increased leakage of raw gas. This deteriorates the combustion conditions in the side flues; therefore, shotblasting is used to seal the furnace wall, reduce raw gas leakage, improve the combustion conditions in the side flues, and increase their temperature. Due to leaks in areas such as the regenerator section, the front of the incline, and the joints of the small flues, the heating in the side flues is also compromised. Sealing these areas is essential for improving the heating in the side flues, especially when using blast furnace gas for heating. 3. Control of coal gas pressure. Due to the increased coking time, the amount of heating gas decreases, which inevitably leads to a drop in gas pressure. To maintain normal gas pressure, it is necessary to replace it with a throttle orifice plate with a smaller aperture. The orifice size of the orifice plate should be determined through calculation, depending on the extent to which the coking time is extended. When the coking time is long and the amount of gas is low, a sign-based management method can be employed: sufficient gas is supplied to the furnaces in the coking stage, while less gas is supplied to those in the holding stage. However, this method is quite complex to manage; it is necessary to establish proper identification markers and operation records, keep track of dynamic changes, etc., in order to avoid conditions of high or low temperatures. 4. Monitoring of gas collector pressure and temperature. After the coking time is extended, the gas collection pressure decreases and experiences significant fluctuations due to the reduced amount of gas generated and the longer intervals between product removals. To reduce fluctuations in the pressure of the gas collection pipe and maintain it effectively, it is possible to adjust the gas circulation volume in the large circulation pipe of the blast condensation system, as well as to strengthen the operational coordination between the gas collection pipe and the blower. The temperature of the gas collection pipe should be maintained at 80–100ºC, and the pressure of the ammonia solution is controlled to keep this temperature stable. To maintain a sufficiently high ammonia pressure to ensure the spraying of ammonia in the bridge tube, the spraying from the gas collection pipe can be partially or fully shut off when the temperature of the gas collection pipe is low. 5. Formulation of the coke pushing plan. When the coking time is extended, the number of times of taking the coke out decreases. If coke pushing is carried out according to the original maintenance schedule, it will inevitably result in prolonged maintenance times and uneven gas production. Therefore, it is necessary to rearrange the frequency of maintenance and formulate a coke pushing plan that suits the conditions of an extended coking time. The arrangement principles are as follows: ① The operation time per batch should not be too long, to avoid damage to the furnace body due to the door remaining open for an extended period ； ②Remove from the furnace evenly to ensure a consistent gas generation rate and stabilize the pressure in the gas collection pipe.

The 15th floor is better; it makes sense@

The most direct and effective method, in my opinion, is to use a burner for supplementary heating. .

We have a coke oven, and one way to increase the temperature at its furnace tip is to raise the mixing ratio of coke oven gas; this method is very effective