JPS60115691A - Preparation of mixed coal/petroleum fuel - Google Patents

Abstract

PURPOSE:To prepare a mixed coal/petroleum fuel having a high coal concn. with reduced power consumption, by pulverizing coal in two steps and mixing heavy fuel oil and a dispersant into it when necessary. CONSTITUTION:Coal is crushed in a crusher 1 and heavy fuel oil and, when necessary, about 0.0001-2.0wt% (based on the coal) dispersant are added to a part of crushed coal. The mixt. is conditioned to a coal concn. of about 10- 55wt% and is fed into a first-step grinder 2 for pulverization to such an extent that particles smaller than 200 mesh in size may account for about 50-100wt%. A remaining portion of the crushed coal and heavy fuel oil and, when necessary, about 0.0001-2.0wt% (based on the coal) additive are added to the pulverized mixt. coming out of the first-step grinder 2. The mixt. is conditioned to a coal concn. of about 40-80wt% and is fed into a second-step grinder 3 for pulverization to such an extent that particles smaller than 200 mesh may account for 50- 100wt%.

Description

[Detailed Description of the Invention] Kio Akira divided the coal into two stages of 10 and stopped the coal.
Heavy oil, mixed with dispersant if necessary, coal/petroleum 7-6
The present invention relates to a method for producing a fuel phase.

In recent years, due to the instability of oil supplies, technological development to effectively utilize lime has been progressing. One of these, l-1
Tes; Take J-K /lL+μ Ka1121-Ql
f −z −= u Jto1rr coal/stone/I′I
Research using I-blended fuel is being put into practical use. However, the conventional method for producing coal/petroleum mixed fuel usually involves pulverizing coal into fine powder and mixing it with heavy oil at the same time, resulting in a high power consumption and a coal concentration of 59 wt.
% or more.

In view of the above points, the inventors of the present invention have carried out intensive research into a method for producing a coal/oil mixed fuel, and have found that when producing a coal/oil mixed fuel with the same coal concentration and particle size, the coal is divided into two stages. When pulverized using a conventional single-stage pulverizer, the power output level can be reduced by 15%, and a product with a coal concentration of 2 to 15% higher can be produced. Based on this knowledge, we have completed the present invention.

That is, the method of the present invention crushes raw coal to produce coal and
To produce petroleum mixed fuel, part of the raw lime, part of the raw lime and heavy oil, part of the raw lime, heavy oil and dispersant are pulverized, and the remainder of the raw lime and the remainder of the raw coal are crushed. and heavy oil, this is the raw material lime's 1-13 y (()-〒〒 〒 7 mountains and γ Melo γ 13 Ya Qi 11 Fu 2 moni / j th tiger sai molecule 1 volume (no) It is characterized by grinding and adjusting.

Hereinafter, the configuration of the present invention will be explained based on the drawings. Dispersant from 0.0001 to 2,9
wt% (per “A coal”), preferably 0.01 to 1.9
wt% (9% of coal) is added to increase the coal concentration to 10-55w.
While adjusting to t%, preferably 30 to 5 Q wt%,
Supply to the first stage crusher 1'ffi2 such as ball mill, cage mill, roller mill, etc., and 50 to 200 meshes or less
It is pulverized to a low weight %, preferably 70 to g 5 wt %. Next, the exit of the first stage crusher 2.
) Add 0.0001 to 2.0% of the remaining coarsely pulverized coal, heavy oil, and dispersant as necessary to the resulting pulverized product. OW% (per dry coal), preferably 0. Ol~1.0wt% (per ``A coal) is added to increase the coal concentration to 40% or more, specifically 40~
While adjusting it to 80 wt%, preferably 45 to 7 Q wt%, it is supplied to the second stage pulverizer 3 such as a Whole Mill Ramil, and the content of less than 200 mesh is 50 to 100 wt%, preferably 60 to 9 Q.
The coal/petroleum mixed fuel product is produced by pulverizing it to a proportion of wt%. The temperature inside the first-stage crusher 2 and second-stage crusher 3 is 40 to 100°C, preferably 60 to 95°C.
Heat and adjust. In addition, the coal/oil mixed fuel from the second stage crusher 3 is introduced into a mixer 4 such as a line mixer,
If necessary, a dispersant may be added to produce a more stable coal/oil mixed fuel.

As the heavy oil used in the present invention, C heavy oil, B heavy oil, atmospheric residual oil, heavy crude oil, etc. are suitable.

As the dispersant used in the present invention, anionic, cationic, nonionic surfactants, etc. may be used alone or in combination, and are appropriately selected depending on the type of coal. Specifically, as anionic surfactants,
Fatty oil sulfuric acid ester/l/salt, higher alcohol sulfate ester salt, nonionic ether salt, V sulfate entel salt, olefin sulfate ester/V salt, alkylaryl nurphone sulfonate, sialgyl sulfosuccinate, acyl sarcosinate , argylbenzene sulfonate, alkyl sulfate salt, polyoxyethylene alkyl) L7 (
Alkyl phenol salt, alkyl phosphate ester salt,
Di-alkyl-nulphosuccinic acid entele salt, acrylic acid moL;l:/ and maleic anhydride copolymer, polycyclic aromatic melphonated product or formalin compound, etc. are used, and as the cationic surfactant, alkyl Amine salts, quaternary amine salts, etc. are used, and nonionic surfactants include polyoxyalkyl ethers, polyoxyethylene alkylphenol ether block polymers, polyoxyethylene alkyl amines, sorbitan fatty acid ethers, and polyoxyethylene sorbitan fatty acid esters. , alkyl lv1'limethylammonium chloride, alkyldimethylpentylammonium chloride, alkylpyridinium salt, polyoxyethylene fatty acid, 11th season alcohol polyoxyethylene ether, alkylphenol polyoxyethylene ether echnolamide, etc. Amphoteric compounds are used, and amphoteric compounds such as alkylbequins are used as top activators; amine compounds such as 1,2.3 monoamines and cyamine;
Higher alkylamino acids and the like are used.

Examples and comparative examples of the present invention will be described below.

Example 1 Coal having the properties shown in the following table was crushed by a coarse crusher to 377!171 or less8
After coarsely pulverizing to 0wt%, 65wt of this coarsely pulverized coal
C heavy oil heated to 90°C was added so that the coal concentration was 4Qwt%, and the total amount was 200 kq/h.
First stage ball mill C weight with r? dl l 2 0 ttg7 h). After turning these into a first stage ball mill, the remaining coarsely pulverized coal was
It was added at 3 kilns and fed to the second stage ball mill. These are crushed in the second stage ball mill, and 20
It was adjusted to 0 mesh or less and 80 wt%. Coal concentration 50.6wt% at second stage ball mill opening 243/Cg/h
of coal/oil mixed fuel was obtained. The viscosity of this fuel is 9
It was 550 cp at 0'C. The power consumption rate at this time was 28KWh/T. Furthermore, when the viscosity was measured while varying the lime concentration, the results were as shown in FIG.

Comparative Example Ball mill with only one stage (same as Example 1) at 52 kg/h, 90°C (7)C
5 1 kq/"n of heavy oil was supplied and pulverized to produce 7 (l) of coal/A" oil mixed fuel with a coal concentration of 50.5 wt% and 8 Qwt% of less than 200 mesh.The viscosity was 9 at 90°C.
00 Cp, and the power consumption per unit is 3.2. 9K
Wh/T. When the viscosity of the coal was measured while changing the agricultural degree, it was as shown in FIG. 2.

From Example 1 and Comparative Example, it is clear that according to the method of the present invention, the power consumption rate can be reduced by about 15%, and the viscosity of the product can be significantly reduced with the same coal (concentration).

Example 2 Coal of the same brand as Example 1 was crushed by a coarse crusher to 3 11 m or less 8
After coarsely pulverizing to Qwt%, this coarse grain 1 (55w of charcoal
90 so that the coal concentration is 45 wt% for t%.
Add C heavy oil heated to °C, total 1601Nq/h
First stage ball mill hr, O heavy oil 8s kq/hr). After this was subjected to ball mill nullary formation in the first stage, the remainder of the coarsely pulverized coal was added at a rate of 59 kg/h, and a nonionic dispersant was added to the coal in an amount of 0.5 wt.
A second stage of ball milling was carried out while adding %. The second stage ball mill was adjusted to have a SO wt% of 200 mesh or less. In the second stage ball mill °C, coal-oil mixed fuel with a viscosity of 1100 cp is
] 9k (j/h).The viscosity was measured at this time while changing the coal concentration, and the viscosity was as shown in Fig. 2.

[Brief explanation of drawings]

FIG. 1 is a flowchart 1- showing an embodiment of the method for producing a coal/petroleum mixed fuel of the present invention, and FIG. 2 is a graph showing the relationship between coal concentration and viscosity in Examples and Comparative Examples. 1... Coarse pulverizer, 2... First stage pulverizer, 3... Second stage pulverizer, 4... Mixer Applicant Kawasaki Heavy Industries, Ltd.

Claims (1)

[Claims] 1. When producing a coal/oil mixed fuel by pulverizing coking coal, a part of the coking coal, a part of the raw lime, JF, E oil, a part of the coking coal, heavy oil, and a dispersant are pulverized. Production of a coal/petroleum mixed fuel characterized in that the remaining raw material coal, the remainder of raw material lime and heavy oil, or the remainder of raw material coal, heavy oil and a splitting agent are introduced into a wet crusher and pulverized and adjusted. Method