CN102477337A - Process for preparing biomass energy particles - Google Patents

Abstract

The invention discloses a process for preparing biomass energy particles, wherein the biomass energy particles are prepared from sawdust or rice hulls or a mixture of the sawdust and the rice hulls through machining and pressing. The process comprises the following steps of: crushing the sawdust to be less than or equal to 1.5mm and the rice hulls to be less than or equal to 7mm; conveying the sawdust, or the rice hulls or the mixture of the sawdust and the rice hulls into a drying room for heating and drying, wherein the drying temperature is 20-80 DEG C; and conveying the dried raw material into ring die pressing equipment, carrying out cold molding to prepare the biomass energy particles. The process disclosed by the invention has the advantages of reasonable raw material formula, favorable technical performance and low energy consumption and production cost. Compared with the traditional biomass particle fuel, the biomass energy particles prepared by utilizing the process disclosed by the invention have the advantage that: energy consumption and cost can be reduced by 20 percent. The biomass particles prepared by utilizing the process disclosed by the invention do not add any chemical preparation, and have no any pollution to environment in production and practical processes.

Description

A kind of technology for preparing biomass energy particles

Technical field

The present invention relates to a kind of technology for preparing biomass energy particles, is a kind of biomass energy particles that uses regenerated wood sawdust, rice husk or their mixture as raw material specifically.

Background technology

At present, the three big main energy sources of using in the world wide are oil, Sweet natural gas and coal, all are the non-renewable energy, and along with the increase of demand and exploitation faces exhausted awkward situation.Conventional energy resources is in short supply to have had a strong impact on socioeconomic fast development; And the concentrated on a large scale use of fossil energy, discharge materials such as a large amount of carbon, sulphur, oxynitride, cause increasing environmental pollution; Global warming has caused serious harm to existent environment of people.For this reason, China has issued " renewable energy source method " in January, 2006, encourages renewable energy source industry development and technological development.Wherein, biomass energy is occupied critical role in renewable energy source, and the shortage that the exploitation biomass energy both can have been replenished conventional energy resources also has great environmental benefit.So, utilize biomass compact forming equipment, make full use of agriculture and forestry organic waste material such as rice husk, wood chip, stalk etc. and produce energy particle, have favorable economic benefit and social benefit.See that from the utilization of resources at present, a large amount of rice husks of China's rice production area are not used effectively.Large-area forest zone, the whole nation also exists a large amount of sylvan life residuum, industrial wood waste not to be utilized effectively.

Therefore, the available stock of this technology is very abundant, has a high potential.

In recent years, people have also studied multiple biomass energy and working method thereof, are 02135891.5 Chinese invention patent like the patent No., disclose a kind of stalk and colliery powder to be mixed the fuel of extrusion molding and working method thereof.But this fuel has objectionable constituent and discharges owing to contains the bastard coal composition after the burning, and it is applicable to direct burning, and the aerogenesis effect is undesirable.Number of patent application is 200710034411.2 Chinese invention patent application; Disclose a kind of biomass granule fuel and working method thereof, though do not add any chemicals, the aerogenesis effect is also comparatively desirable; But for making formed product effective; Need to add yam or Ipomoea batatas as tackiness agent, complex manufacturing, production cost is also higher.

Summary of the invention

Technical problem to be solved by this invention provides a kind of technology for preparing biomass energy particles; This particle does not add any chemicals; Product calorific value height, forming, economy and social benefit are high, have overcome prior art and have added any chemicals, the more high shortcoming of production cost.

In order to address the above problem, the invention provides following technical scheme:

This biomass energy particles is formed through the mechanical workout compacting by the mixture of wood sawdust, rice husk or wood sawdust and rice husk.

The biomass energy particles formed of wood sawdust and rice husk wherein, its volume proportion is 1:0.5N1:5, the preferred volume proportioning is 1:1.

The preparation method of this biomass energy particles may further comprise the steps:

Pulverize: wood sawdust is crushed to≤1.5mm, rice husk is crushed to≤7mm;

Heat drying: the mixture of wood sawdust, rice husk or wood sawdust and rice husk is sent into the kiln heat drying, and the exsiccant temperature is 20～80 ℃;

Compression moulding: above-mentioned dried raw material is sent into ring mold pressing control equipment, and this biomass energy particles is produced in coldmoulding.

Wherein, the drying temperature of wood sawdust is 70 ℃; The drying temperature of rice husk is 30 ℃; Wood sawdust and rice husk volume proportion are that the drying temperature of the mixture of 1:1 is 50 ℃.

Have prior art to compare, composition of raw materials of the present invention is reasonable, and technical feature is good, energy consumption and low production cost; Compare with present prior biological matter granular fuel and working method thereof, energy consumption and cost can reduce 20%; Biological particles of the present invention does not add any chemicals, and product has no pollution to environment in production and practical process.

Embodiment

EXAMPLE l:

The wood sawdust of humidity is pulverized and screened, its granularity is reached≤1.5mm; The wood sawdust of choosing is sent into again and carried out heat drying in the roller drying chamber, temperature is 70 ℃; Afterwards, after carrying out degasification, removal of impurities processing, send into the ring mold pressing equipment of contracting and carry out extrusion molding, process diameter 6mm, length 6～30mm is flaxen energy particle; Send into cooling apparatus cooling, screening then, adorn to seal and deposit, the formed product rate reaches 98%, and water ratio is not more than 8%.

Embodiment 2:

The rice husk of humidity is pulverized and screened, its granularity is reached≤7mm; The wood sawdust of choosing is sent into again and carried out heat drying in the roller drying chamber, temperature is 30 ℃; Afterwards, after carrying out degasification, removal of impurities processing, send into the ring mold pressing equipment of contracting and carry out extrusion molding, process diameter 6mm, length 6～30mm is flaxen energy particle; Send into cooling apparatus cooling, screening then, adorn to seal and deposit, the formed product rate reaches 98%, and water ratio is not more than 8%.

Embodiment 3:

With the wood sawdust that crushes and rice husk mixed, and send into whisking appliance and stir by 1:1; Mixed uniformly raw material is sent into again and carried out heat drying in the roller drying chamber, temperature is 50 ℃; Afterwards, after carrying out degasification, removal of impurities processing, send into the ring mold pressing equipment of contracting and carry out extrusion molding, process diameter 6mm, length 6～30mm is flaxen energy particle; Send into cooling apparatus cooling, screening then, adorn to seal and deposit, the formed product rate reaches 98%, and water ratio is not more than 8%.

Claims (2)

1. a technology for preparing biomass energy particles is characterized in that: suppressed forming through mechanical workout by the mixture of wood sawdust, rice husk or wood sawdust and rice husk; The biomass energy particles formed of wood sawdust and rice husk wherein, its volume proportion is 1:0.5-1:5; The volume proportion of the mixture of said wood sawdust and rice husk is 1:1.

2. one kind like the described a kind of technology for preparing biomass energy particles of claim l, may further comprise the steps:

Pulverize: wood sawdust is crushed to≤1.5mm, rice husk is crushed to≤7mm;

Heat drying: the mixture of wood sawdust, rice husk or wood sawdust and rice husk is sent into the kiln heat drying, and the exsiccant temperature is 20～80 ℃;

Compression moulding: above-mentioned dried raw material is sent into ring mold pressing control equipment, and this biomass energy particles is produced in coldmoulding.