CN105985825A - Method for preparing biomass briquette coal - Google Patents

Abstract

The invention discloses a method for preparing biomass briquette coal in the field of briquette coal. The method includes the following steps of 1, biomass fermenting, wherein biomass, a fermenting agent and water are fully mixed to be even in the mass ratio of 60:1:60, then the mixture is contained into a closed container, put into a constant temperature incubator at the temperature of 20 DEG C and fermented and cultivated for 7 days, natural drying is carried out, and the fermented biomass is prepared; 2, mixing, wherein powdered coal is dried, smashed and ground into the state with the particle size below 3 mm, then the fermented biomass is smashed below 3 cm, powdered coal, the fermented biomass and bentonite are stirred to be even in the mass ratio of 16:3:1, and water with the mass of 10% of that of the fermented biomass is added into a solid mixture; 3, pressing molding, wherein the solid mixture is pressed and molded under the pressure of 20 MPa to 40 MPa, and is dried for 1 h in a drying oven at the temperature of 105 DEG C to 110 DEG C, the temperature is naturally cooled to the indoor temperature, and the biomass briquette coal is prepared. The biomass briquette coal prepared with the method is good in compressive strength, the expansion and cracking problems are not generated, and production cost is low.

Description

A kind of preparation method of biomass coal

Technical field

The invention belongs to moulded coal field, be specifically related to a kind of biomass coal.

Background technology

Biomass coal technology is to utilize fine coal calorific value height, burning persistency strong, and pure biomass coal is easy Both are blended, compression forming, it is achieved reducing emission of carbon dioxide, two by the features such as combustion, burning persistency difference Sulfur oxide, reduces flue dust, saves the multiple effectiveness of coal resources.Domestic by biomass through physically or chemically Modified make it have certain cohesiveness, with coal molding, prepare the preferable moulded coal of combustibility.It is not enough Part is: Physical is modified causes biomass addition in moulded coal to be restricted due to comminution energy conssumption height, The perishable molded coal production facility of industrial chemicals that chemical method modification adds, prepared biomass coal pressure resistance It is poor to spend, and biomass are poor with the affinity of coal, the easy swelling cracking of biomass coal.

Summary of the invention

It is an object of the invention to provide the preparation method of a kind of biomass coal so that it is prepared biomass type Coal comprcssive strength is good, the problem that will not produce swelling cracking, reduces production cost.

The object of the present invention is achieved like this: the preparation method of a kind of biomass coal, including walking as follows Rapid:

1) biomass ferment: take biomass that mass ratio is 60: 1: 60, leaven is sufficiently mixed with water Uniformly, then mixture is contained in hermetic container, inserts fermentation culture 7 days in 20 DEG C of constant incubators, Fermentation of biomass is prepared after natural drying；

2) mixing: fine coal is dried, pulverizes and grinds to form the granularity state at below 3mm, then by upper State fermentation of biomass and be crushed to below 3cm, take fine coal, fermentation of biomass that mass ratio is 16: 3: 1 Stir with bentonite, in solid mixture, add the water of its quality 10%；

3) compressing: by above-mentioned solid mixture under the pressure of 20～40MPa compressing, then The baking oven of 105～110 DEG C is dried 1h, naturally cools to room temperature and prepare biomass coal.

As a further improvement on the present invention, described step 3) in solid mixture at the pressure of 30MPa Under compressing.

Compared with prior art, the beneficial effects of the present invention is: add useful in moulded coal by employing Fermentable modified biomass, utilizes microbial metabolism to produce the Degradation of a series of enzymes, by straw The macromolecular carbohydrate such as cellulose, hemicellulose and lignin in crude fibre are degraded to low molecular Monosaccharide or polysaccharide so that it is have cohesiveness, overcome the rigidity of biomass simultaneously, increases it in moulded coal Addition, make the biomass coal comprcssive strength prepared good, the problem that swelling cracking will not be produced, raw Product cost is relatively low.

Detailed description of the invention

The present invention is described in detail below in conjunction with specific embodiment.

The preparation method of a kind of biomass coal, comprises the steps:

1) biomass ferment: take biomass that mass ratio is 60: 1: 60, leaven is sufficiently mixed with water Uniformly, then mixture is contained in hermetic container, inserts fermentation culture 7 days in 20 DEG C of constant incubators, Fermentation of biomass is prepared after natural drying；

2) mixing: fine coal is dried, pulverizes and grinds to form the granularity state at below 3mm, then by upper State fermentation of biomass and be crushed to below 3cm, take fine coal, fermentation of biomass that mass ratio is 16: 3: 1 Stir with bentonite, in solid mixture, add the water of its quality 10%；

3) compressing: by above-mentioned solid mixture under the pressure of 30MPa compressing, then The baking oven of 105～110 DEG C is dried 1h, naturally cools to room temperature and prepare biomass coal.

The invention is not limited in above-described embodiment, on the basis of technical scheme disclosed by the invention, this The technical staff in field is according to disclosed technology contents, it is not necessary to performing creative labour just can be to wherein Some technical characteristics make some replace and deformation, these replace and deformation all at the protection model of the present invention In enclosing.

Claims (2)

1. the preparation method of a biomass coal, it is characterised in that comprise the steps:

1) biomass ferment: take biomass, leaven and water that mass ratio is 60: 1: 60 and be sufficiently mixed uniformly, Again mixture is contained in hermetic container, insert fermentation culture 7 days in 20 DEG C of constant incubators, naturally dry Fermentation of biomass is prepared after dry；

2) mixing: fine coal is dried, pulverizes and grinds to form the granularity state at below 3mm, then by above-mentioned Ferment biomass powder is broken to below 3cm, takes fine coal that mass ratio is 16: 3: 1, fermentation of biomass and swollen Profit soil stirs, and adds the water of its quality 10% in solid mixture；

3) compressing: by above-mentioned solid mixture under the pressure of 20～40MPa compressing, then The baking oven of 105～110 DEG C is dried 1h, naturally cools to room temperature and prepare biomass coal.

The preparation method of a kind of biomass coal the most according to claim 1, it is characterised in that: described step Rapid 3) in, solid mixture is compressing under the pressure of 30MPa.