The amount of oxygen coking in the boiler, the effect of coking on the boiler

There are many reasons for boiler coking, and among the measures to control and prevent coking, the amount of coking oxygen is an important concern

1.Choose a reasonable amount of oxygen for operation. If the oxygen amount of boiler operation is low, the reducing atmosphere in the furnace is strong, the ash melting point of coal will decrease, and the boiler will be easy to coke.

This is because the melting point of ash decreases with the increase of the amount of iron, and the effect of iron on the melting point of ash is also related to the nature of the gas in the furnace, and in the oxidizing atmosphere in the furnace, the iron may be Fe2O3

The morphology exists, and with the increase of iron content, its melting point decreases slowly; Reducible atmosphere in the furnace.

(insufficient oxygen), Fe2O3 will be reduced to FeO, and the ash melting point will decrease rapidly, and Feo is the easiest.

SiO2 with SiO2 in ash slag forms SiO2 with a very low melting point, and its ash melting point is only 1 065. When the coal quality fluctuates, the operator cannot adjust it according to the actual situation, resulting in the boiler combustion air distribution mode is not in an optimized state.

In particular, the burnout of pulverized coal particles in the upper nozzle is poor, and some large particles of pulverized coal are not yet at the outlet of the furnace.

Burnout, resulting in high flue gas temperature and serious coking at the outlet of the boiler furnace, due to the large cross-section of the furnace, the heat load is small;

When the coal quality deteriorates, the burnout performance of pulverized coal is not adaptable. Increase the oxygen capacity of the boiler operation to avoid the furnace outlet.

Now the atmosphere is restored. Strengthen the soot blowing work in the furnace, especially in key areas to increase the number of soot blowing, if running.

The oxygen level is still low, and the load should be reduced appropriately if necessary. Since the main area of coking is at the outlet of the furnace, this is accommodated.

It is easy to block the flue, increase the resistance of the flue gas, and the output of the induced draft fan is more insufficient, so it is necessary to prevent coking and reducing gas.

The trend of a vicious circle. When the unit is overhauled, the air preheater should be cleaned to reduce the resistance of the air flue.

force to increase the output of the fan.

2.Select a reasonable furnace outlet temperature to optimize the combustion adjustment test of the boiler, and discharge smoke from the furnace.

The amount of oxygen is operated to ensure that the main parameters are qualified and the flue gas temperature of the furnace outlet is lower than the melting point of coal ash to ensure the vapor quality.

volume, thus preventing coking at the furnace outlet; Through the furnace outlet flue gas temperature, superheated steam temperature, boiler load, combustion.

Coking is generated, which prevents coking in the boiler furnace when burning different coal types and maximizes boiler efficiency.

Rate. 3 .Ensure a good mixture of air and fuel, avoid the formation of a reducing atmosphere near the water wall, and prevent.

Stop local serious ash accumulation and coking. (Lu Lu Luqi; While.

The location, wind speed and air volume of the primary and secondary winds are not designed.

When reasonable, despite the large total air volume in the furnace, there will still be local areas of red-hot coke and volatiles that cannot be obtained.

oxygen and a local reducing atmosphere. When the oxygen content of the flue gas of pulverized coal furnace is less than 3%, due to local hypoxia, it will.

This will cause a sharp increase in CO content.

4.Various operational measures are applied to control the temperature level in the furnace.

According to the toxic, flammable and explosive characteristics of coke oven gas, as well as the elimination and reduction of the occurrence of excessive oxygen content in the production system, the serious safety production hazards brought by the subsequent process and production control, the control measures and management of the oxygen content exceeding the standard in the coking gas production process are very important in the actual production process. 2.The scope is aimed at the process management of gas oxygen content in the coking production system, combined with the current device characteristics, operation practice and process control management of the main tamping coke oven, and puts forward practical management measures and specific methods involving post operation, inspection and maintenance, professional special care, etc.

Hello, coking refers to the formation of a hard layer of material due to the accumulation of deposits or combustion products on the internal pipes or combustion chamber walls of the boiler. The impact of coking on the boiler is very unfavorable, mainly in the following aspects:1

Reduced thermal efficiency: Coking will lead to a decrease in the heat transfer efficiency of the boiler because the coking layer will hinder the transfer of heat, thus reducing the thermal efficiency of the boiler, which will lead to a waste of energy. 2.

Increased energy consumption: Since coking reduces the thermal efficiency of the boiler, in order to keep the boiler running properly, it is necessary to increase the consumption of fuel, which will lead to wasted energy and increased costs. 3.

Affect safety: Coking will cause the internal pressure of the boiler to rise, which will increase the risk of slippage of the boiler, which will pose a threat to the safety of personnel and equipment. 4.

Extended maintenance intervals: Coking can cause damage to the boiler's piping and combustion chamber walls, requiring more frequent maintenance and cleaning, which will increase boiler maintenance costs and downtime. Therefore, in order to avoid the adverse effects of coking on the boiler, the boiler needs to be cleaned and maintained regularly to maintain the normal operation and high efficiency of the boiler.

Summary. Hello dear! Coking refers to the accumulation of impurities in the fuel on the inner wall of the boiler to form coke residue.

Coking can adversely affect the operation of the boiler, such as the following:1Blocked Pipes:

Coking causes the cross-section of the tubing to become smaller, increasing the resistance of the fluid. This affects the fluid's fluidity and heat transfer performance, resulting in a decrease in the efficiency of the boiler. 2.

Erosion of the pipe wall: Coking will increase the temperature of the pipe wall, resulting in oxidation and corrosion of the metal on the pipe wall, and shortening the service life of the boiler. 3.

Increased maintenance costs: Coking inside the boiler will increase the difficulty and expense of maintenance and cleaning, and prolong the downtime of the boiler for maintenance. 4.

Safety hazards: Coking may lead to pipeline explosion, ** and other safety accidents. Therefore, it is necessary to reduce coking inside the boiler as much as possible, carry out regular cleaning and inspection every year, use suitable fuels and additives, and control the temperature of the boiler wall and combustion process.

Hello dear! Coking refers to the accumulation of impurities in the fuel on the inner wall of the boiler to form coke residue. Coking can adversely affect the operation of the boiler, such as the following:

1.Blockage of the pipeline: Coking causes the bench section of the line to become smaller, increasing the resistance of the fluid.

This can affect the fluidity and heat transfer properties of the fluid, resulting in a decrease in the efficiency of the boiler. 2.Erosion of pipe walls:

Coking will increase the temperature of the pipe wall, which will lead to oxidation and corrosion of the metal on the pipe wall, and shorten the service life of the boiler. 3.Increased repair costs:

Coking inside the boiler will increase the difficulty and cost of maintenance and cleaning, and prolong the shutdown and maintenance time of the boiler. 4.Safety Hazards:

Coking may lead to pipeline bursting, ** and other safety accidents. Therefore, it is necessary to reduce coking inside the boiler as much as possible, carry out regular cleaning and inspection every year, use suitable fuels and additives, and control the temperature of the boiler wall and combustion process. 

Analysis of the influence of coking on boiler operation

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Pro: This is an article on the impact analysis of boiler operation. The main content of this paper is to analyze the quality and coking degree of coke and study its impact on the operation of Yantanxiao boiler, so as to improve the efficiency and safety of boiler operation. In the article, it is introduced that when the coke is serious, it will have a negative impact on the operation of the boiler, which may lead to problems such as boiler ** and accidents.

At the same time, the article also introduces the influence of coke quality on boiler operation, introduces its main characteristics and application directions, and provides some enlightenment for the optimization and safety of boiler operation. Overall, "Analysis of the Influence of Coking on Boiler Operation" is a very valuable research article, which can provide some important reference for the management and optimization of boiler operation. 