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Production method for briquette

A manufacturing method and briquette technology, applied in the petroleum industry, solid fuel, fuel, etc., can solve the problems of dust generation, and achieve the effect of excellent safety and high strength

Active Publication Date: 2021-05-14
NIPPON STEEL & SUMIKIN ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition to being difficult to handle, pulverized coal can also be a cause of dust

Method used

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  • Production method for briquette
  • Production method for briquette
  • Production method for briquette

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1 and comparative example 1

[0056]

[0057] Prepare the following 12 binders.

[0058] (1) Aqueous solution of polyvinyl alcohol (polymerization degree: 1700, saponification degree: 99.7 mol%) (polyvinyl alcohol content: 10% by weight)

[0059] (2) Alpha starch (from corn)

[0060] (3) Alpha starch (from tapioca)

[0061] (4) Straight run asphalt

[0062] (5) Soft asphalt (SOP)

[0063] (6) Asphalt A

[0064] (7) Asphalt B

[0065] (8) Vinyl acetate emulsion

[0066] (9) Molasses A (no added slaked lime)

[0067] (10) Molasses B (add slaked lime)

[0068] (11) pulp waste liquid

[0069] (12) Alkaline aqueous solution of humic acid

[0070] (13) Bentonite

[0071] The carbonized coal obtained by carbonization was sieved with a 1 mm sieve, and the above-mentioned binders (1) to (13) were kneaded separately to obtain molding raw materials. Binders (1) and (8) to (13) can be kneaded at room temperature to prepare molding raw materials. On the other hand, the binders (4) to (7) were difficult to...

Embodiment 2

[0081] An aqueous solution (aqueous binder solution) containing polyvinyl alcohol at a concentration of 10% by weight (saponification degree: >99.85 mol%, polymerization degree: 1700), water, and pyrolysis coal used in Example 1 were mixed to obtain a mixture. The compounding ratio based on weight at this time was 30 parts by weight of the binder aqueous solution and 10 parts by weight of water with respect to 100 parts by weight of pyrolysis coal. The mixture was molded using a single-screw press molding machine (molding pressure: 283 MPa) to produce a plurality of coal briquettes (before drying). The water content of this briquette was 27.6% by weight, and the compressive strength (average value of n=2) was 66N. compressive strength use figure 1 measuring device for the measurement.

[0082] Dry the produced briquettes in the air at 80°C for 15 hours. The moisture and compressive strength of the dried briquettes are shown in Table 2. The moisture content of the coal briq...

Embodiment 3

[0089] Except having used polyvinyl alcohol (saponification degree: >99.3 mol%, polymerization degree: 1700) instead of the polyvinyl alcohol used in Example 2, briquette was produced similarly to Example 2, and it measured. The results are shown in Table 3.

[0090] [table 3]

[0091]

[0092] As shown in Table 3, the briquetting coal of Example 3 maintained a compressive strength of 70N or higher even after 24 hours. Example 2 having a high degree of saponification has higher compressive strength than Example 3, and is also excellent in water resistance.

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Abstract

Provided is a production method that is for a briquette and that comprises a step for obtaining a briquette having a water content of 5 wt% or less by molding a molding raw material containing a powder carbonized coal and a binder and drying the same at 60-100 DEG C. The binder contains an aqueous solution of a polyvinyl alcohol having a saponification degree of more than 99.3 mol% and a polymerization degree of 1700 or more. The powder carbonized coal is a pulverized coal obtained by drying and carbonizing a coal including brown coal and / or subbituminous coal.

Description

technical field [0001] The invention relates to a method for producing briquette. Background technique [0002] In the coal production process, powdered pulverized coal is produced. In addition to being difficult to handle, pulverized coal can also be a cause of dust generation. Therefore, effective utilization of pulverized coal by molding the pulverized coal into briquettes has been studied. For example, Patent Document 1 proposes a technique of adding starch as a binder to pulverized coal, mixing them, and covering the surface of a molded product obtained by molding with heavy oil such as heavy oil or tar. In Patent Document 2, a technique of molding pulverized coal after adding tar or tar residue is proposed. [0003] prior art literature [0004] patent documents [0005] Patent Document 1: Japanese Patent Laid-Open No. 2003-64377 [0006] Patent Document 2: Japanese Patent Application Laid-Open No. 9-3458 Contents of the invention [0007] The problem to be so...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C10L5/14
CPCC10L5/14
Inventor 森英一朗安田和真小菅克志藤吉旭浦田裕介有吉大辅
Owner NIPPON STEEL & SUMIKIN ENG CO LTD
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