Vaporized coarse slag is used as a fuel additive in power plant boilers
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Are there any manufacturers that send a small amount of the coarse slag from coal water slurry gasifiers to power plants for use as fuel? I hope to share my experience.
If a solution can be found to the problem of using the coarse slag from water-coal slurry gasifiers as fuel in power plant boilers, it would constitute an effective measure for reducing solid waste.
A small amount can be used for cooking, but definitely not in large quantities.
In many places these days, the principle is to exploit things to the fullest within a reasonable range, but few pay attention to the key phrase \"within a reasonable range\"; more often, decisions are made arbitrarily.
This post was last edited by The wise are enlightened on 2020-8-13 09:36. It’s likely that the power plant will not agree, as the moisture content is too high, the calorific value is low and unstable, which affects the operation of the boiler. It’s like an elderly person who sometimes takes medications to raise blood pressure and other times takes those to lower it; they breathe heavily. Can the boiler handle that? In particular, ash and black water affect the working environment of power plants.
A thermal power plant with an annual coal processing capacity of about 8 million tons. It is planned to mix an appropriate amount of the gasified coarse slag with reduced moisture content into bituminous coal; this will certainly increase the ash content of the bituminous coal and reduce its calorific value, provided that the requirements for coal used in boilers are still met. Objective: To make maximum use of the coarse residue. I want to know if anyone in the industry does this or has tried it.
Coarse slag has not been seen yet; the key issue is that its calorific value is low. Was it cost-effective in the past? I’ve seen quite a few fine residues
With a small amount of blending, it is necessary to ensure proper prevention of blockages in the boiler’s coal supply; moreover, blending accelerates the wear on the boiler’s heating surfaces.
It is fine to burn a small amount of alternative fuel in circulating fluidized bed boilers, but it is not suitable for coal-fired boilers, as the coarse slag is difficult to grind. You can figure out the appropriate mixing ratio on your own. Also, this water-coal slurry slag must be of the single-nozzle type; multi-nozzle slag is not necessary.
Is it the same situation for my company as well? I didn’t dare to try. I want to know if there are any people in the industry who have done this or tried it.