What are the functions of circulating ash of circulating fluidized bed boiler?

Circulating fluidized bed boiler is a kind of equipment with high efficiency and low pollution, and it has been widely used in power station, industry and other fields. Circulating ash is an important part of circulating fluidized bed boiler, which changes with the running state. So what are the functions of circulating ash of circulating fluidized bed boiler?

The role of circulating fluidized bed boiler circulating ash

The circulating ash in the circulating fluidized bed boiler consists of two parts, one is the ash in the furnace that rises to a certain height in the center of the furnace and then descends into the material layer along the surrounding water walls, and the other part is separated by the cyclone separator and returned to the material. Return the ash in the furnace.

The function of circulating fluidized bed boiler circulating ash is:

1.During the cycle, the unburned coal is re-combusted to make full use of its heat.

2.Increase the ash concentration in the furnace. This ash concentration is very important to the boiler. Only with a moderate ash concentration can the boiler operate normally. operating in the state. It is worth noting that the ash concentration in the furnace is proportional to the pressure difference in the furnace (the pressure difference in the furnace is the pressure difference from the upper part of the material layer to the furnace outlet).

ZOZEN Boiler optimizes the performance of circulating fluidized bed boilers

It can be seen from the analysis that the role of circulating ash in the circulating fluidized bed boiler is very important, which affects the stable and efficient operation of the boiler. As a leader in the industrial boiler industry, ZOZEN Boiler conducts a comprehensive analysis of the effect of circulating fluidized bed boiler circulating ash, optimizes product structure, and improves product performance:

1.The circulating fluidized bed is a low-temperature combustion with low nitrogen oxide emissions, which can achieve emissions below 150mg/Nm³ or even 100mg/Nm³. It can realize direct desulfurization in the combustion process, and the desulfurization efficiency is high.

2.The fuel is widely usable and the combustion efficiency is high, reaching more than 89%, especially suitable for low calorific value and inferior coal and biomass bulk materials.

3.The load adjustment range is large, and the low load can be reduced to about 30% of the full load.

4.Optimize the structure of the separator to effectively improve the separation efficiency, so that the carbon content of the boiler fly ash is not more than 6%, and the carbon content of the bottom slag is not more than 2%.

5.Select the appropriate fluidization speed and optimize the anti-wear measures of each heating surface in the furnace to ensure that the heating surface in the furnace runs without wear for a long time and the exhaust gas temperature is stable. The annual operation time of ZOZEN boiler is not less than 8,000 hours, and the continuous operation time is not less than 7,000 hours.

6.High degree of automation, easy maintenance, less operation and maintenance personnel required.

ZOZEN circulating fluidized bed boiler products are divided into DHX series circulating fluidized bed steam boilers, SHX series circulating fluidized bed steam boilers, SHX series circulating fluidized bed hot water boilers, and QXX series low nitrogen circulating fluidized bed hot water boilers. At present, Huaibei Mining, Taikang Industrial Park, Ganfeng Lithium Industry, Qinghai Salt Lake and other enterprises have reached friendly cooperative relations with ZOZEN Boiler, and all use ZOZEN's circulating fluidized bed boilers.