Environment protection type coal water slurry and preparation thereof

Abstract

The invention relates to environment-friendly water-coal slurry and a method for preparing the same. The aim of the invention is to prepare the environment-friendly water-coal slurry by using wheat straw chemical pulping paper-making black liquor waste water and coal slurry as raw materials. The mixture ratio of the water-coal slurry is as follows: 57 to 62 percent of the (dried) coal slurry, 15 to 20 percent of the pulping paper-making black liquor, and 20 to 27 percent of pulping paper-making medium wastewater; and the total weight of various components is 100 percent. The method comprises the following steps: pumping the pulping paper-making black liquor subjected to sulfonating treatment into a strong stirring barrel; feeding the coal slurry into the strong stirring barrel through a feeder; pumping the pulping paper-making medium wastewater into the strong stirring barrel; starting the strong stirring barrel so that the materials are further dispersed and mixed; and filtering the mixture to remove impurities, and then pumping the mixture into a slurry storage tank through a screw pump for standby.

Description

technical field [0001] The invention relates to a coal water slurry and a preparation method thereof, in particular to an environment-friendly coal water slurry prepared by mixing wheat straw chemical pulping and papermaking black liquor wastewater with coal slime, and a preparation method of the coal water slurry. technical background [0002] After coal washing, a large amount of coal slime will be discharged. The coal slime has high ash content, low grade, small particle size, high viscosity, high moisture content, low commodity value, and requires a large amount of storage space. It is unstable in the accumulation state, it is easy to lose when it meets water, and it will fly when it is air-dried, which pollutes the environment and is difficult to handle. Coal washing plants all over the country produce a large amount of coal slime every day, and if the coal slime is not disposed of in time, it will affect the normal production of the coal washing plant. On the other ha...

AI Technical Summary

Problems solved by technology

Unstable in the accumulation state, easy to lose when exposed to water, fly when air-dried, pollute the environment, and difficult to handle

Coal washing plants across the country produce a large amount of coal slime every day, and if the coal slime is not disposed of in time, it will affect the normal production of the coal washing plant

On the other hand, the wheat straw chemical pulping and papermaking used in my country's paper industry will discharge a large amount of black liquor wastewater, which seriously pollutes the ecological environment. Black liquor wastewater contains a large amount of resources such as lignin, humic acid and organic matter, but most of them cannot be obtained. Reasonable use