CN101812346A

CN101812346A - Method for forming biomass fuel

Info

Publication number: CN101812346A
Application number: CN201019181004A
Authority: CN
Inventors: 邢淦琛; 邵和义; 刘云; 李春梅
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-02-02
Filing date: 2010-02-02
Publication date: 2010-08-25

Abstract

The invention discloses a method for forming a biomass fuel and particularly relates to a method for forming a biomass fuel by using plant straw, wood flour, shrub, grass and the like as raw materials. In the method, biomass, coal dust and kieselguhr are used as raw materials and are crushed, mixed and compressed to be formed. The stable calorific value of biomass of different types and from different places can be obtained by adjusting the mixing ratio of coal to the biomass; under the condition of rated stable working conditions of a boiler, the influences of alkaline corrosion on the biomass are eliminated, the bonding forming of the crushed biomass particles is promoted effectively, the formed particles have high physical quality and properties, the compression forming rate is improved and energy consumption for forming is reduced. The biomass fuel of the invention can make full use of the straw, wood flour, shrub and grass and other wastes, and helps to reduce the demands for coal, natural gas and other non-renewable energy resources and relieve environmental pollution caused by combustion; and the biomass fuel has the advantages of improving volumetric heat release rate of the boiler and furnace temperature, improving thermal efficiency of the boiler, along with stable calorific value, alkaline corrosion resistance, quick ignition, high combustion efficiency, and the like. The biomass fuel can be used in biomass combustion power generation, and thus, the problem caused of lack of regional biomass that at present biomass power generation cannot be performed continuously and stably.

Description

A kind of biomass fuel forming method

Technical field:

The present invention relates to biomass fuel forming method, particularly a kind of is the biomass fuel forming method of main raw material with straw, wood chip, shrub, weeds etc.

Background technology:

China is a large agricultural country, and agricultural straw resource is very abundant, but because the stalk comprehensive utilization degree is lower at present, and considerable crop material is thrown aside in the field, whenever the harvest season, the phenomenon of the crop straw burning of setting fire in the farmland is seen everywhere.This has not only caused the significant wastage of resource, and the smog of crop straw burning has also caused severe contamination to atmospheric environment, the hidden danger that also becomes initiation fire, traffic accident, burns the electric wire communication cable.How to make full use of a large amount of stalk renewable resourcess and cause the attention of government agencies at all levels and various circles of society day by day; this not only can solve the many harm that causes in the crop straw burning process; and can alleviate energy starved pressure to a certain extent, corresponding minimizing uses coal, oil etc. can not lose the negative impact of resource to ecological environmental protection again.

Given this, biomass such as stalk through dehydration, pulverizing, moulding supervisor, are prepared into the compact solid biomass fuel, not only can solve the renewable energy utilization problem, and can make increasing peasant income, effectively solve a series of harm problems that peasant's crop straw burning causes.Technology for compressing and forming has solved stalk fuel transportation difficulty, has stored difficult, the difficult problem of preventing fires, for utilizing, the strange land transportation creates conditions, can improve the biomass fermentation electrical efficiency and solve biomass caustic corrosion problem by stable caloric value, can be used as biological coal supply industrial production and resident uses, also be good gasified raw material simultaneously, promoter action arranged promoting vapourizing furnace or gasification station.The stalk piece of compression moulding is further charing processing also, obtains charcoal and gac, can be widely used in metallurgy, chemical industry, environmental protection, life fuel.But because present shortcoming such as low, the cost height of big, fragile, the complex process of molding device energy consumption, production efficiency, and there are problems such as calorific value instability, caustic corrosion in shaped fuel in combustion processes, causes biomass molding fuel to be difficult to extensive popularization.

Summary of the invention:

In order to overcome the deficiency of the above present biomass molding fuel at present, the invention provides a kind of biomass fuel forming method.The object of the present invention is achieved like this: by adding diatomite or coal dust, promote that the biological particles of pulverizing is adhesion-molded, guarantee that shaped granule has good physical qualities characteristic, improve the compressed moulding rate, reduce the moulding energy.Add diatomite or coal dust, can eliminate the influence of biomass caustic corrosion, mix with coal at region difference, diverse biomass, can stable caloric value, satisfy the combustion stablized condition of boiler declared working condition.

A kind of biomass molding fuel of the present invention adopts the preparation of following method: at first biomass fuel is broken into powder, adds diatomite again, coal dust carries out mixing and stirring; The humidity of the temperature control mixed powder by the control dry-heat air enters molding device again and is prepared into shaped granule for being easy to moulding humidity (10%～20%).

Adopt the formed biomass molding fuel of the present invention to have the following advantages:

1, made full use of stalk, wood chip, shrub, weeds the like waste, reduced the demand of Nonrenewable energy resources such as coal, Sweet natural gas, and improved and burned the problem of environmental pollution that causes.

2, possess with the shaped fuel of biomass, wood chip, shrub, weeds the like waste and coal dust, diatomite preparation that calorific value is stable, the alkali-free etching problem, on fire fast, the efficiency of combustion height improves volume of boiler thermal load and fire box temperature, improves advantages such as boiler thermal output.

3, the stalk of compression moulding is easy to gasification and charing.

4, be used for generating power with biomass combustion, can solve because the present biomass power generation that regional amount of biomass deficiency causes can not the continous-stable operation problem.

Embodiment:

The ratio of choosing biomass and coal dust in the calorific value and the required particulate calorific value of biomass, coal dust; Diatomite 5～8%.

The preparation method is as follows: biomass and coal dust are pulverized according to the calculating ratio, and adding diatomite mixes, the humidity of the temperature control mixed powder by the control dry-heat air enters molding device again and is prepared into shaped granule for being easy to moulding humidity (10%～20%).

Claims

1. biomass fuel forming method, it is characterized in that: biomass and coal dust are pulverized according to the calculating ratio, and adding diatomite mixes, the humidity of the temperature control mixed powder by the control dry-heat air enters molding device again and is prepared into shaped granule for being easy to moulding humidity (10%～20%).

2. a kind of biomass fuel forming method according to claim 1, the ratio that it is characterized in that described biomass and coal dust are to choose according to the calorific value of coal dust and required particulate calorific value; Diatomite 5～8%.