CN104560245A

CN104560245A - Method for preparing coal water slurry

Info

Publication number: CN104560245A
Application number: CN201310667829.2A
Authority: CN
Inventors: 黄常活; 侯文彪; 林克忠; 李前; 孔令深
Original assignee: Wuzhou Sun Shine Forestry & Chemicals Co Ltd Of Guangxi
Current assignee: Wuzhou Sun Shine Forestry & Chemicals Co Ltd Of Guangxi
Priority date: 2013-12-07
Filing date: 2013-12-07
Publication date: 2015-04-29

Abstract

The invention discloses a method for preparing coal water slurry. The method comprises the following steps: A. conveying raw coal into a hopper by using a lifter at first, then conveying the raw coal in the hopper into a high-speed centrifugal jet mill by using a quantitative feeding machine for crushing, and crushing the raw coal to coal powder with fineness of 200-300 meshes; B. conveying the coal powder obtained in the step A by crushing into a dust collector by using a pipeline and a centrifugal fan in an air draft manner, and collecting the coal powder; and C. conveying the obtained coal powder into a slurrying stirring tank by using a feeding machine and a screw conveyor, adding water and additives, stirring for 2-3 hours, and filtering to obtain a finished product of coal water slurry. The fineness of the coal water slurry product prepared by the preparation method disclosed by the invention is larger than 200 meshes, the 200-mesh sieving rate is 100%, and the 300-mesh sieving rate is 60%.

Description

The preparation method of coal water slurry

Technical field

The present invention relates to COAL-WATER SLURRY TECHNOLOGY field, be specifically related to a kind of preparation method of coal water slurry.

Background technology

The conventional preparation techniques of coal water slurry is: raw coal → fragmentation → add water, additive are carried out ball (grinding) and ground slurry → filtration → finished product (coal water slurry).The party's intermittent wet method pulping process owned by France, also has some to be continuity wet method pulping process, and the feature of this technique uses coal to have very strong selectivity, processing requirement is high, and pulping product reads generally≤200 orders (sieving rate >=90%) in detail, water ratio >=34% simultaneously, transportation cost is high.

Summary of the invention

The invention provides a kind of preparation method of coal water slurry, according to pulping product fineness > 200 order that the method is obtained, its 200 order sieving rate reaches 100%, and 300 order sieving rates reach 60%.

In order to solve the problems of the technologies described above, the technical solution adopted in the present invention is:

A preparation method for coal water slurry, the method comprises the following steps:

A. first raw coal lift is delivered into hopper, then pulverize in the raw coal feeding high speed centrifugation micronizer mill in hopper with the rate of feeding of 1T/H ~ 1.5T/H with batch feeder, being crushed to fineness of pulverized coal is 200 order ~ 300 orders;

B. steps A is pulverized the coal dust obtained to be delivered in slurrying stirred pot, then add water, additive, stir 2 ~ 3 hours, then filter and obtain this coal water slurry finished product; The mass ratio of described coal dust, water, additive is 55 ~ 58:42 ~ 45:0.5 ~ 0.7; Described additive forms for 8:1:1 is composite in mass ratio primarily of naphthalene sulfonic acidformaldehyde condensation product sodium salt, sulfonated lignin and alkylphenol polyoxyethylene (methyl) acrylate;

Above-mentioned, in step B, coal dust is delivered to particle collector by pipeline and centrifugal blower exhausting, and then be transported in slurrying stirred pot through feeding machine and worm conveyor; Wherein, the wind pulverized coal conveying that centrifugal blower is taken out is to particle collector, the dust remained in wind is got back in high speed centrifugation micronizer mill with described wind and is carried out the use of Xun ring, this results in an airtight power transportation pipe, the dust that coal dust is produced in course of conveying can not leak in outside air and cause environmental pollution, also can play effect dust being carried out to secondary recovery utilization simultaneously.

Owing to adopting technique scheme, the beneficial effect that the present invention obtains is:

1. ball mill wet method pulping process traditionally obtains water coal slurry concentration is 55%, applies pulping process of the present invention and water coal slurry concentration can be made to bring up to 58%; Its fineness of pulverized coal increases, and 200 order sieving rates reach 100%, and 300 order sieving rates reach 60%; Pulping is effective, and expands the range of choice being suitable for coal.

2. the pulverizing of raw coal and the course of conveying of coal dust carry out in closed environment, can well solve environmental protection and safety problem.

3. the present invention in stokehold slurrying, can reduce transportation cost.

Embodiment

Below in conjunction with example, the invention will be further described:

In embodiment 1 ~ embodiment 3, described additive refers to that primarily of naphthalene sulfonic acidformaldehyde condensation product sodium salt, sulfonated lignin and alkylphenol polyoxyethylene (methyl) acrylate be the composite compositional liquor body additives of 8:1:1 in mass ratio.

Embodiment 1

First raw coal lift is delivered into hopper, then pulverize in the raw coal feeding high speed centrifugation micronizer mill in hopper with the rate of feeding of 1 T/H with batch feeder, being crushed to fineness of pulverized coal is 200 orders; The coal dust obtained is delivered in slurrying stirred pot, then adds water, additive, stir 2 hours, then filter and obtain this coal water slurry finished product; Wherein, the mass ratio of coal dust, water, additive is 55:42:0.5.

Embodiment 2

First raw coal lift is delivered into hopper, then pulverize in the raw coal feeding high speed centrifugation micronizer mill in hopper with the rate of feeding of 1.2 T/H with batch feeder, being crushed to fineness of pulverized coal is 250 orders; The coal dust obtained is delivered in slurrying stirred pot, then adds water, additive, stir 2.5 hours, then filter and obtain this coal water slurry finished product; Wherein, the mass ratio of coal dust, water, additive is 58:45:0.7.

Embodiment 3

First raw coal lift is delivered into hopper, then pulverize in the raw coal feeding high speed centrifugation micronizer mill in hopper with the rate of feeding of 1.5 T/H with batch feeder, being crushed to fineness of pulverized coal is 300 orders; The coal dust obtained is delivered in slurrying stirred pot, then adds water, additive, stir 3 hours, then filter and obtain this coal water slurry finished product; Wherein, the mass ratio of coal dust, water, additive is 56:44:0.6.

Claims

1. a preparation method for coal water slurry, is characterized in that the method comprises the following steps:

B. steps A is pulverized the coal dust obtained to be delivered in slurrying stirred pot, then add water, additive, stir 2 ~ 3 hours, then filter and obtain this coal water slurry finished product; The mass ratio of described coal dust, water, additive is 55 ~ 58:42 ~ 45:0.5 ~ 0.7; Described additive forms for 8:1:1 is composite in mass ratio primarily of naphthalene sulfonic acidformaldehyde condensation product sodium salt, sulfonated lignin and alkylphenol polyoxyethylene (methyl) acrylate.

2. the preparation method of a kind of coal water slurry according to claim 1, is characterized in that in described step B, coal dust is delivered to particle collector by pipeline and centrifugal blower exhausting, and then is transported in slurrying stirred pot through feeding machine and worm conveyor; Wherein, the wind pulverized coal conveying that centrifugal blower is taken out is to particle collector, and the dust remained in wind is got back in high speed centrifugation micronizer mill with described wind and carried out the use of Xun ring.