Separation and quantitative determination of carbon black particles and residual coke in coal-fired fly ash

Abstract

The invention relates to a separation method of carbon black particles and residual coke in fire coal fly ash. The separation method comprises the following steps: firstly preparing fire coal fly ash turbid liquid, then standing the turbid liquid so that residual coke is settled and the carbon black particles and the residual coke are layered in a liquid dispersing agent to generate floating phase containing the carbon black particles and settlement phase containing the residual coke, and respectively collecting the floating phase and the settlement phase to realize separation of the carbon black particles and the residual coke in the fire coal fly ash. In addition, the invention also relates to a quantitative determination method of the carbon black particles and the residual coke in the fire coal fly ash. According to the separation and quantitative determination methods of the carbon black particles and the residual coke in the fire coal fly ash, required devices, appliances and instruments are simple and easy to get, and the prices are low. The separation and quantitative determination methods are suitable for actual operation of a power plant. By utilizing the separation and quantitative determination methods, separation and quantitative determination of the carbon black particles and the residual coke in the fire coal fly ash can be realized.

Description

technical field [0001] The invention relates to the field of high-efficiency and low-pollution combustion and utilization of coal, in particular to a separation and quantitative determination method for carbon black particles and residual coke in coal-fired fly ash. Background technique [0002] Coal is the most widely used energy source. For example, in China's electricity production, about 70% of electricity is generated by coal-fired power generation. With the development of society and economy, China's energy consumption is showing an increasing trend year by year. [0003] In the actual boiler coal combustion process, due to the incomplete combustion of coal powder, unburned carbon (including carbon black particles and residual coke) will be formed, and finally mixed in fly ash, which not only causes waste of fuel, but also brings pollution of the atmospheric environment. Carbon black particles in unburned carbon are agglomerated carbon-rich particles with extremely f...

AI Technical Summary

Problems solved by technology

This method is very difficult for actual coal-fired power plants, because it needs to use a special sampler to sample the particles at a constant speed. On the one hand, the Andersen particle impactor is expensive, and on the other hand, the sampling process is very complicated, and human errors large, and this method cannot quantitatively detect residual focus in fly ash

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