Method for preparing biomass molded coal

A biomass and briquette technology, applied in the fields of biofuel, waste fuel, petroleum industry, etc., can solve the problems of difficulty in forming coal alone, insufficient strength of briquette, poor waterproofness, etc., to meet long-distance transportation and open storage, The effect of increasing the temperature and reducing the processing cost

Inactive Publication Date: 2011-09-21
CHNA ENERGY INVESTMENT CORP LTD +2
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Problems solved by technology

[0013] However, there are certain problems in this method, that is, the production area of ​​weakly caking coal and non-caking coal such as low-rank bituminous coal or middle-aged lignite to be formed is high, and only weakly caking coal such as low-rank bituminous coal or middle-aged lignite and non-caking coal in specific areas Coal sticking can achieve the purpose of molding, such as low-rank bituminous coal or middle-aged and old lignite produced in the Hulunbuir area of ​​Inner Mongolia, but it is difficult to use the above-mentioned ...

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preparation example Construction

[0066] In another specific embodiment of the present invention, a kind of preparation method of binderless biomass briquette is provided, comprising:

[0067] Crushing raw coal and biomass;

[0068] Screen the crushed raw coal and biomass;

[0069] Then the sieved raw coal and biomass are mixed evenly according to a certain ratio;

[0070] Rapidly heat the evenly mixed mixture of raw coal and biomass to a predetermined temperature, and then hold it at this temperature for a certain period of time;

[0071] Compressing the insulated mixture of raw coal and biomass under a molding pressure with a compression molding die or a compression molding machine; and

[0072] The formed briquettes are cooled and demolded to obtain a binder-free biomass briquette product.

[0073] In the present invention, the term "binderless biomass briquette" refers to a biomass briquette formed without additional binders.

[0074] Preferably, the cooling is carried out using a chain cooler.

[007...

Embodiment 1

[0121] The plant biomass used in the biomass briquette raw material is crop straw;

[0122] The raw coal in the biomass briquette is lignite produced in Inner Mongolia.

[0123] Lignite and biomass are proportioned according to the following mass fractions, namely: 80 parts of lignite and 20 parts of biomass. Material particle size: ≤3mm; material moisture: ≤5%.

[0124] Measure the cold compressive strength of the biomass briquette obtained according to the determination method of industrial briquette cold compressive strength stipulated in T / T748-1997, and measure the water resistance of the biomass briquette obtained according to the method stipulated in MT / T749-1997 (including waterproof time).

[0125] Calorific value was determined according to the standard GB / T213-2008.

[0126]Fig. 1 is the schematic diagram of the preparation process of the biomass briquette of this embodiment of the present invention, and its technological process is: (1) lignite is sent into coal...

Embodiment 2

[0129] The plant biomass used in the biomass briquette raw material is straw;

[0130] The raw coal in the biomass briquette is long bituminous coal;

[0131] Bituminous coal and biomass are proportioned according to the following mass fractions, namely: 80 parts of long bituminous coal and 20 parts of biomass. Material particle size: ≤3mm; material moisture: ≤5%.

[0132] Measure the cold compressive strength of the biomass briquette obtained according to the determination method of industrial briquette cold compressive strength stipulated in T / T748-1997, and measure the water resistance of the biomass briquette obtained according to the method stipulated in MT / T749-1997 (including Soaking in water and re-drying strength (N / piece)).

[0133] Fig. 1 is the schematic diagram of the preparation process of the biomass briquette of this embodiment of the present invention, and its technological process: (1) long bituminous coal is sent into coal pulverizer, is ground into partic...

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Abstract

The invention relates to a method for preparing biomass molded coal, which comprises: (a) crushing and sieving raw coal and biomass, and mixing and heating in a first mode of mixing raw coal and biomass and heating to a preset temperature or a second mode of heating the raw coal and biomass to a first temperature and a second temperature respectively, mixing and heating to the preset temperature; (b) performing pressing molding of the mixture of the raw coal and the biomass, which is obtained in the first mode or second mode, by using a mold under a forming pressure; and (c) cooling the molded coal and demolding to obtain the biomass molded coal. In the method, the biomass contains lignin, the preset temperature is a temperature at which the lignin in the biomass softens or liquefies, and the first temperature is lower than or equal to the second temperature. When the method is used for forming fuel, the high-strength biomass composite molded coal can be produced without using adhesive.

Description

technical field [0001] The invention belongs to the field of clean coal application, and more specifically relates to a biomass briquette, especially a binder-free biomass briquette and a preparation method thereof. Background technique [0002] my country is the second largest energy consumer in the world, and the primary energy is mainly coal. At present, my country's coal production and consumption account for more than 75% of the primary energy composition, becoming the world's largest coal producer and consumer. According to the characteristics of my country's energy resources and social and economic conditions, it can be predicted that for a long time in the future, my country will still be the main producer and consumer of coal. [0003] my country's coal reserves, resources and predicted resources total 5,569.7 billion tons, of which low-grade bituminous coal and lignite account for more than 50% of the coal reserves, and these coal resources are mostly distributed i...

Claims

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Application Information

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IPC IPC(8): C10L5/04C10L5/08
CPCY02E50/30Y02E50/10
Inventor 邵俊杰朱书全苏晓辉刘红缨陈元春杨玉立李玉洁
Owner CHNA ENERGY INVESTMENT CORP LTD
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