Novel pulping method for hyperfine water-coal-slurry

Abstract

The invention provides a slurry preparation method of a novel ultra-fine coal water slurry, comprising the preparation steps of a. crushing the raw coal till the granularity is less than 0.5mm, b. carrying out a first floating selection disposal to the crushed raw coal powder, c. wet grinning the approved coal grains in the first floating selection in a ball grinding machine by adding water, d. carrying out a secondary fine floating selection disposal of the coal water slurry after the wet grinding, e. grinding the coal slurry which has been disposed by the fine floating selection with sands so as to gain the ultra-fine coal slurry with the granularity less than 5 Mum, f. carrying out the swirling flow selection of the ultra-fine coal slurry with the granularity less than 5 micron meters, and further carrying out desulfurization and ash removal by utilizing the centrifugal separation principle, carrying out a vacuum pressing filtration disposal to the ultra-fine coal water slurry so as to form a solid coal water slurry. The slurry preparation method of the novel ultra-fine coal water slurry can reduce a plurality of electricity consumption, gains ultra-fine coal water slurry with ultra-low ash and low sulphur, and meets the requirement of the replacement of fuel with the coal water slurry.

Description

Technical field [0001] The invention relates to the field of processing and manufacturing of coal water slurry, in particular to a novel ultra-fine coal water slurry preparation method. Background technique [0002] As the price of fuel continues to rise, the use of coal-water slurry to replace fuel has become an inevitable trend in history. At present, coal water slurry has been widely used in many fields. However, limited by the current preparation process of coal water slurry, the particle size of coal water slurry is about 70 microns, and the ash content is about 10%. Among them, most of the important pollution source—sulfur is not removed, which makes the application of coal water slurry suffer A lot of restrictions. For example, in roller kilns or glass kilns that produce high-quality ceramic products, the high ash content of coal water slurry has a serious impact on the quality of the products and cannot be used. For another example, the current environmental protection re...

AI Technical Summary

Problems solved by technology

However, limited by the current preparation process of coal water slurry, the particle size of coal water slurry is about 70 microns, the ash content is about 10%, and most of the important pollution source - sulfur has not been removed, which limits the application of coal water slurry very restrictive

For example, in the roller kiln or glass kiln that produces high-quality ceramic products, due to the high ash content of coal-water slurry, it has a serious impact on the quality of the product and cannot be used.

Another example is that the environmental protection requirements of various cities are becoming increasingly stringent, and the existing coal-water slurry cannot be directly used in these large and medium-sized cities, because its use must reduce its ash content to less than 1%.

This point can not be achieved according to the current coal water slurry pulping process

For many energy-consuming households, coal-water slurry cannot replace fuel oil, resulting in a huge waste of energy

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