How to determine low oxygen coal content and poor atomization effect
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I would like experts to share their practical work experience and explain how they make such judgments.
The low oxygen-to-coal ratio in SHELL can be directly determined from the steam production of the gasifier and the temperature readings at several measurement points after quenching; it can also be inferred from the methane and carbon dioxide contents in the syngas, as well as the color and shape of the slag, although with a delay. The atomization effect refers to the degree of atomization of diesel and oxygen entering the gasification furnace when the unit is started up, and it is determined through atomization tests
I’ll give a brief answer; please correct me if I’m wrong, teachers: 1. By “low oxygen-coal ratio,” I temporarily understand it to mean that the ratio of oxygen to coal is low, but you didn’t explain it clearly. With a low oxygen-to-coal ratio, the CO2 content decreases significantly, the carbon conversion rate drops, steam consumption increases, and the residual carbon content in the slag rises markedly. 2. A poor atomization effect can also lead to a significant increase in the residual carbon content in the slag. A common consequence of both is a significant increase in the residual carbon content in the slag.
It’s the oxygen-coal ratio, but how can we distinguish the differences between the two? (Apart from checking the actual oxygen-coal ratio, are there any other good methods?) When the oxygen-coal ratio is low and the atomization effect deteriorates, both the amount of slag and the composition of the gases change.
The oxygen-coal ratio is low and the furnace temperature is low; it should be quite obvious!
When the atomization effect is poor, the temperature is also low
Our factory determines this based on the condition of the slag; the slag cannot be too fine nor too coarse, nor too dry nor too wet. The particle size of the slag should be moderate, and its humidity should also be moderate