CN105623759A - Preparation method of fuel coal water slurry master batches - Google Patents

Abstract

The invention discloses a preparation method of fuel coal water slurry master batches. The preparation method comprises the following steps: mixing various high-quality coal according to a proportion by a belt conveyor and a screw conveyor to obtain raw coal; inputting the raw coal into a crusher to carry out rough crushing; inputting the crushed raw coal into a plurality of pulverizers; after each pulverizer carries out fine grinding on the raw coal, blowing air into the crusher to a collector by a fan; enabling coal dust obtained by collection of the collector to enter a separator to carry out separation to obtain coal dust, and returning the coal dust with a large particle size into the pulverizers to circularly carry out fine grinding; according to a use demand ratio, weighing, mixing and stirring to obtain the batches; according to use demands, adding an additive and existing sewage on site into the batches obtained after mixing so as to obtain a coal water slurry finished product. The process is a preparation process of the dry grading coal water slurry batches, a grading technology is accurately achieved, a product transportation storage mode can be carried out according to powder materials, no precipitates are generated, a transportation volume is reduced by over 20 percent, only water needs to be added to stir in the using process, and on-site sewage can be utilized to prepare the coal water slurry in the field.

Description

A kind of preparation method of fuel coal water slurry master batch

Technical field:

The invention belongs to water-coal-slurry preparation field, relate to a kind of method preparing water-coal-slurry, the preparation method of the concrete moisture fuel coal water slurry master batch less than 10%.

Background technology:

China's energy resource structure has the feature of rich coal, oil-poor, few gas, and coal accounts for the 70% of China's energy-consuming, and in the time longer afterwards, coal still will be unable to as China's main energy sources change.

Water-coal-slurry is that the coal dust by certain grating fineness mixes with water, there is certain stability and mobility, can the pulpous state coal product of long-distance pumping, it is a kind of cleaning coal based fluid fuel and raw material, there is preparation, storage, conveying and advantage easy to use, at China's large-scale promotion application. Water-coal-slurry is contained the coal of about 60��70%, the water of 30��40% and a small amount of additive and is obtained by Physical Processing, and it can transport as oil, stores, be atomized and stable ignition burning, and calorific value is equivalent to the half of fuel oil.

In order to ensure calorific value and the environmental requirement of water-coal-slurry, country has put into effect the relevant criterion of water-coal-slurry. In order to meet standard regulation, the raw material coal of preparation water-coal-slurry there is strict index request. Reach the water-coal-slurry of standard, it is necessary to select high heating value, sulfur-bearing low containing ash, the fat coal that paste-forming properties is good. But, the distribution of these fat coals is few, and price is high, have impact on the application popularization of water-coal-slurry. And existing water-coal-slurry preparation technology is loaded down with trivial details, the shortcoming such as the water coal slurry concentration prepared is low, poor fluidity.

Fuel coal water slurry produces at present and all adopts low concentration slurrying and pulping with high density technique, i.e. wet method slurrying, slurrying concentration is less than 66%, and the fuel coal water slurry of wet-layer preparation increases freight volume more than 20%, and user stores and is all easier in transport produce precipitation, affects result of use and economic benefit.

Summary of the invention:

The preparation method that the technical problem to be solved in the present invention is to provide fuel coal water slurry master batch, this preparation method accurately realizes grating technology, and scene is only pressed formula preparation and used just, and Product transport is easy to use, can process various sewage according to practical situation.

For solving above-mentioned technical problem, the preparation method of a kind of fuel coal water slurry masterbatch, it is characterised in that comprise the steps:

Step 1, multiple fat coal is mixed in proportion by belt conveyer and spiral conveyer, obtains the raw coal of mixing;

Step 2, raw coal is inputted disintegrating machine slightly break;

Step 3, by the raw coal input multiple stage flour mill after slightly broken;

Step 4, every flour mill are dried to catcher in kibbling mill by blower fan after raw coal fine grinding cigarette is ground to form varigrained coal dust;

Step 5, catcher are collected the coal dust entrance separator separation obtained and are obtained coal dust, and the coal dust that granularity is bigger returns flour mill circulation fine grinding;

Step 6, by the coal dust obtained according to user demand ratio weigh mix and blend obtain master batch;

Step 7, obtain water-coal-slurry finished product according to user demand to the water or the sewage that add additive and using area in mixed master batch.

As preferably, the quantity of described flour mill is be more than or equal to 3.

Advantages of the present invention is as follows: this technique is the preparation technology of dry method grating water-coal-slurry master batch (moisture is less than 10%), accurately realize grating technology, scene is only pressed formula preparation and is used just, Product transport storing mode can be undertaken by powder material, produce without precipitation, reduce by more than 20% freight volume, only need to add water during use to stir, on-the-spot available on-the-spot sewage controlling the water circulation coal slurry.

Detailed description of the invention

The preparation method that the present invention provides a kind of fuel coal water slurry masterbatch, comprises the steps, its process chart is shown in Fig. 1:

Step 1, multiple fat coal is mixed in proportion by belt conveyer and spiral conveyer, obtains the raw coal of mixing;

Step 2, raw coal is inputted disintegrating machine slightly break;

Step 3, by the raw coal input multiple stage flour mill after slightly broken;

Step 4, every flour mill are dried to catcher in kibbling mill by blower fan after raw coal fine grinding cigarette is ground to form varigrained coal dust;

Step 5, catcher are collected the coal dust entrance separator separation obtained and are obtained coal dust, and the coal dust that granularity is bigger returns flour mill circulation fine grinding;

Step 6, by the coal dust obtained according to user demand ratio weigh mix and blend obtain master batch;

Step 7, obtain water-coal-slurry finished product according to user demand to the water or the sewage that add additive and using area in mixed master batch.

The quantity of described flour mill is be more than or equal to 3.

Above-mentioned technique is the preparation technology of dry method grating water-coal-slurry master batch (moisture is less than 10%), accurately realize grating technology, scene is only pressed formula preparation and is used just, Product transport storing mode can be undertaken by powder material, produce without precipitation, reduce by more than 20% freight volume, only need to add water during use to stir, on-the-spot available on-the-spot sewage controlling the water circulation coal slurry.

Finally it is pointed out that above example is only invent more representational example. Obviously, technical scheme is not limited to above-described embodiment, it is also possible to have many deformation. All deformation that those of ordinary skill in the art can directly derive from present disclosure or associate, are all considered as protection scope of the present invention.

Claims (2)

1. the preparation method of a fuel coal water slurry masterbatch, it is characterised in that comprise the steps:

Step 1, multiple fat coal is mixed in proportion by belt conveyer and spiral conveyer, obtains the raw coal of mixing;

Step 2, raw coal is inputted disintegrating machine slightly break;

Step 3, by the raw coal input multiple stage flour mill after slightly broken;

Step 4, every flour mill are dried to catcher in kibbling mill by blower fan after raw coal fine grinding cigarette is ground to form varigrained coal dust;

Step 5, catcher are collected the coal dust entrance separator separation obtained and are obtained coal dust, and the coal dust that granularity is bigger returns flour mill circulation fine grinding;

Step 6, by the coal dust obtained according to user demand ratio weigh mix and blend obtain master batch;

Step 7, obtain water-coal-slurry finished product according to user demand to the water or the sewage that add additive and using area in mixed master batch.

2. the preparation method of a kind of fuel coal water slurry masterbatch according to claim 1, it is characterised in that the quantity of described flour mill is be more than or equal to 3.