Fri. Nov 1st, 2024

Coal-fired steam boilers in power plants are widely used, not only in the power industry, but also as the main supply equipment for heat energy required by factories and heating. 20ton coal fired boiler automatic control of thermal combustion can utilize advanced modeling, design and control techniques. Thus, the combustion effect of boiler is improved and economic benefits are brought to the power plant. This series of boiler automatic control technology is perfect, less capital investment, can intelligently control the operation of the boiler, greatly reduce manpower, reduce costs.

 

20ton coal fired boiler
20ton coal fired boiler

 

20ton coal fired boiler heat release law of fuel will directly affect the heat distribution in the combustion chamber. Thus affect the boiler design combustion chamber heating surface layout. The content of volatiles in coal directly affects the heat release of volatiles in different areas of the combustion chamber. Because the calorific value of volatiles is high, it has a great influence on the distribution of combustion share. When the volatile content of the fuel is higher than that of the designed coal, the combustion share in the dense phase zone decreases. On the contrary, the combustion share in dense phase region increases.

Circulating fluidized bed boiler material from the bed material (such as river sand for start up, limestone for desulfurization) and the formation of coal balance performance is very poor. The reason for this is that the ash particles are easy to wear, and 100 ~ 300 PM this part of the total efficiency of particles stay in the oven for a long time, although the size range of particles in the intrinsic into ashes occupies a large proportion of the, but due to the partial abrasion particles in the boiler after a long back, fine grinding, eventually lead to bed material in this part of the particle size of ash content decreased. The reduction of bed material quality leads to a corresponding reduction in circulation.

According to the results of industrial operation, coal fired CFB boiler is suitable for burning coal with high ash content. When the ash content of coal is more than 10g/mJ, the boiler ash balance is easier to achieve. When the converted ash amount of coal is less than 8.25g/MJ ‘, the ash balance is difficult to achieve, and solid materials need to be replenished regularly or continuously. The influence of ash content on material balance can be quantitatively analyzed by the material balance model. If the influence of feeding coal particle size, ash formation and wear characteristics is excluded, the increase of ash content makes the boiler material balance easy to achieve, which is mainly reflected in the increase of entrainment amount of export materials, resulting in the increase of material concentration at the upper part of the furnace.

 

Coal fired CFB boiler
Coal fired CFB boiler

 

The 20ton coal fired boiler can be desulfurized directly during the combustion process, and the desulfurization efficiency is higher. It has a wide range of fuel applicability, high combustion efficiency, energy saving more than 30%, coal saving 3-6% NOx content furnace can be as low as 50mg. Development in cooperation with Tsinghua University. The boiler characterized by low energy consumption and low emission has brought great social benefits. As a new high efficiency and low pollution clean coal technology, CFB combustion technology has many advantages.

Zozen Boilers has a group of experienced R & D, design, production and after-sales staff, from site investigation, evaluation, planning, design, product manufacturing, equipment installation and after-sales service, have established a set of perfect system. Our company has established long-term project EPC and engineering consulting and other deep cooperative relations with many large group companies.

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