Environment protection and quality increasing process for coal and water-coal fluid

Abstract

A process to treat coal for decreasing its environmental pollution and improving its quality includes such steps as superfine pulverizing to obtain submicron-class coal particles, and mixing them with desulfurizing assistant. A water-coal slurry is prepared from micron-class coal particles and micron-class desulfurizing assistant. Its advantages are high combustion efficiency, low pollution and not blocking to nozzle.

Description

【Technical field】 [0001] The invention relates to deep processing of natural resources, in particular to an environmental protection and high-quality coal treatment method and coal water slurry. 【Background technique】 [0002] Coal and petroleum are both conventional energy sources used by humans on a large scale, among which coal reserves are the most abundant, about 20 times that of petroleum. In China's energy resource reserves, coal accounts for more than 84%, which has huge development potential. From the perspective of resource supply, China's hundreds of millions of tons of coal resources can fully meet China's huge energy growth demand within a century and replace part of the non-essential oil demand. In actual use, coal does occupy a dominant position, accounting for more than 70% of China's energy structure. Coal resources are easy to mine, but compared with oil, there are still many disadvantages: solid fuel, inconvenient transportation, low combustion efficienc...

AI Technical Summary

Problems solved by technology

However, this kind of coal water slurry has great wear and tear on the combustion nozzle, and it is also easy to block the nozzle.

In addition, during the combustion of coal, a large amount of sulfur-containing flue gas will be produced, causing serious acid rain and dust pollution.

At present, in the combustion desulfurization of coal at home and abroad, the most mature and effective method is to add desulfurizers, such as calcium carbonate, but due to the small reaction surface area, it often needs to be added in a relatively large amount, and the reaction is difficult to fully react.