Technique for procuring desulfurization type water-solubility instant coal powder

A production process and water-soluble technology, applied in the field of desulfurization dry-process coal-water slurry production process, can solve the problems of increased storage difficulty, poor slurry performance, and difficulty in obtaining high-quality, high-concentration coal-water slurry, etc. , to achieve the effects of simplified packaging and transportation, good stability and significant desulfurization effect

Inactive Publication Date: 2008-03-19
张绍龙
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] After the desulfurizer is added to the liquid coal-water slurry, its slurry-forming performance will deteriorate, its rheological properties will deteriorate, and the storage difficulty will be further increased.
[0005] At present, in the dry pulping process, the particle size is not easy to control, the accumulation efficiency is not high, and the pulping concentration is low
Generally, it is obtained by simple milling and adding additives for pulping, and the product structure is single
Coal powder with the highest accumulation efficiency cannot be produced continuously by a single mill, so it is difficult to obtain high-quality, high-concentration coal-water slurry

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] 820kg of raw coal is crushed to less than 30mm by a drum crusher, 22kg of desulfurizer is added, and it is pulverized by three pendulum mills respectively. Among them, a pulverizer controls the particle size distribution of coal powder from 500 μm to 100 μm, b pulverizer controls the particle size distribution of coal powder from 200 μm to 50 μm, and c pulverizer controls the particle size distribution of coal powder from 100 μm to 30 μm. The product is collected through wind separation pipelines, and the pulverized coal particles below 75μm account for more than 75%, and the pulverized coal particles account for 25%-5% of 300μm-75μm, so that the pulverized coal has the highest accumulation efficiency. Then add 6.5kg of additive A and mix evenly to obtain the initial product of the present invention—desulfurization type water-soluble instant coal powder. The pulverized coal is made into 8cm×16cm×32cm, which has a certain mechanical strength, and is not easily broken whe...

Embodiment 2

[0023] Raw coal with ash content of 32% is 1700kg, and the moisture content is controlled below 5%. After being crushed by a drum crusher, the coal is dry-separated by an air-heavy medium fluidized bed, and then the clean coal after deashing is added with a desulfurizer: 14kg. Add additive A: 11kg in proportion to all or part to none, and use a bowl mill and a pendulum mill to control the particle size distribution of coal powder below 75 μm and above 75 μm respectively to obtain coal powder below 75 μm Accounting for more than 75%, 300μm-75μm accounting for 25%-5%, coal powder has the highest accumulation efficiency, namely the desulfurization type water-soluble instant coal powder of the present invention. Then the powder is made into a spherical shape with a certain mechanical strength and a diameter of 3mm-80mm. The spherical desulfurization-type water-soluble instant coal powder is added to a certain proportion of water, disintegrated rapidly, stirred and sheared to form ...

Embodiment 3

[0025] Raw coal with ash content of 28% is 2300kg, and the moisture content is controlled below 6%. After being crushed by the jaw crusher, the low-ash clean coal is combined with two pendulum mills to prepare powder through air selection, and the coarse and fine coal are controlled separately. According to the particle size distribution and mass fraction of powder, the result of combined coal powder is obtained: particles below 75 μm account for more than 75%, 300 μm-75 μm account for 25%-5%, coal powder has the highest accumulation efficiency, add desulfurizer: 21kg , Additive B: 19kg Stir evenly to obtain the desulfurization type water-soluble instant coal powder of the present invention, and make the powder into a 10cm×20cm×40cm square with a certain mechanical strength. Add the massive desulfurization-type water-soluble instant coal powder to a certain proportion of water, disintegrate rapidly, and form a slurry after stirring and shearing, with a concentration of 65%-70% ...

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Abstract

The present invention relates to the liquid coalite slurry dry processing technology, in particular to a desulphurization type dry liquid coalite slurry production process. The process includes the steps that: firstly, rough coal is broken up to below 30 mm through a jaw crusher or a roll crusher, the water content is controlled below 7 percent, and the coal is chosen by a dry coal cleaning way through an air dense medium fluidized bed; secondly, the full or the part of addition agent, desulfurization agent, desulfurization additive is added into the deashing float coal after the dry coal cleaning, and combined through two to eight swing type powder machines or bowl type powder machines, and powder is prepared through a parallel or series combination grade, the qualified powdered coal is collected through the air separation with a pipeline, the partial or full addition agent mixture is added again, namely, the dustless desulfurization type water soluble quick dissolving powdered coal.The appearance of the product can be non-dust emission powdery, or granulated, or massive. The present invention provides a high grade liquid coalite slurry dry formed slurry process which has high quality, desulfurization, and low cost, the liquid coalite slurry is convenient to be transported, when being used, the water content or the other industrial organic waste water is only required to be added into according to the proportion, the slurry is formed through agitating.

Description

technical field [0001] The invention relates to a coal-water slurry manufacturing technology, in particular to a desulfurization type dry-process coal-water slurry production process. Background technique [0002] Coal water slurry is composed of 60%-70% coal, a small amount of additives and water. It is processed by special pulping. It can be pumped like oil and atomized for combustion. It has high combustion efficiency and has the ability to replace oil and gas. , energy saving, environmental protection and other comprehensive advantages. It can be widely used in industrial boilers, power station boilers, domestic boilers, industrial kilns, steelmaking furnaces, and can also be used as raw materials for coal gasification and many other fields. [0003] At present, wet pulping is generally used in the manufacture of coal water slurry, and the equipment is heavy, noisy and costly. Liquid coal-water slurry requires special transportation tools and storage equipment, and its...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L1/32F23K1/02
Inventor 张绍龙王赐安周钟明
Owner 张绍龙
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