CN101538499A

CN101538499A - Composite briquette and method for producing same

Info

Publication number: CN101538499A
Application number: CN200810030872A
Authority: CN
Inventors: 肖国雄; 肖鹏
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-03-21
Filing date: 2008-03-21
Publication date: 2009-09-23

Abstract

The invention discloses a composite briquette and a method for producing the same. The composite briquette comprises the following components in weight percentage: 60 to 85 percent of biomass fuel, 12 to 35 percent of anthracite, and 3 to 5 percent of water glass bonding agent. The production method comprises the following steps that: the biomass fuel, anthracite and water glass bonding agent are crushed and evenly mixed according to the weight percentage; the mixture is pressed into the briquette by a press; and the briquette is placed in a carbonizing furnace for carbonization. The briquette burns easily and for a long time; the bonding strength of the water glass is relatively strong, the main component of the water glass after vulcanization is a silicone gel solid, so that the composite briquette has relatively high bonding capability, is not easy to break while transporting and using, can form a silicon dioxide skeleton after being vulcanized, and can resist high temperature; when the composite briquette is burned, the silicone gel and ash form a honeycomb support, so that the composite briquette is good in permeability and can be completely burned; when the composite briquette is carbonized, the outer layer is carbonized to form a hard shell, so that the strength of the composite briquette is improved; and volatile compounds contained in the composite briquette can escape in a great amount, so that the emission of black smoke is avoided when the composite briquette is burned.

Description

A kind of composite briquette and production method thereof

Technical field:

The present invention relates to a kind of composite briquette and production method thereof.

Background technology:

In city and landscaped area, it is clean energy that boiler oil requires.Current, petroleum resources are fewer and feweri, and price one tunnel raises, and people strive to find some substitute energys, and as sun power, wind energy and bioenergy utilize sun power with the method for physics, and investment is big, and efficient is low.And bioenergy is a kind of low cost, the energy that service efficiency is high, and the charcoal with the biomass waste materials is produced catches fire, combustion time is short easily; Hard coal is the coal of degree of coalification maximum, hard coal fixed carbon content height, and fugitive constituent is low, and density is big, and hardness is big, and the tail-off time is long.But hard coal burning-point height catches fire and after-flame all compares difficulty, at present, people mix hard coal and biological material (plant straw, shell, fruit stone, forestry tankage, bark, wood sawdust etc.), add a large amount of binding agents, composite briquette is made in pressurization, as the fuel of boiler, composite briquette often adopts mineral binder bond, as natural kaolin, wilkinite etc., there is following deficiency in this composite briquette: 1. owing to contain a large amount of volatile matters in the moulded coal, still over-emitting black exhaust during burning, contaminate environment; 2. employing natural kaolin, mineral binder bonds such as wilkinite are because the cohesive force of such binding agent is relatively poor, and do not have the hydraulicity, therefore the briquette strength of making of it is lower, when especially wetting water, moulded coal is easy to the softening structure completely destroy that causes, and percentage of damage is very high in transportation and use; 3. the binding agent add-on is big, moulded coal water content height, and volatile matter is many, can significantly reduce the calorific value of moulded coal.

The object of the present invention is to provide a kind ofly catch fire easily, combustion time is long, the composite briquette of over-emitting black exhaust not during burning, and the composite briquette structural strength is higher, broken non-friable rate in transportation, use.

Another purpose of the present invention is to provide a kind of production method of composite briquette.

The present invention seeks to realize like this, its component of this composite briquette is biomass fuel, hard coal, soluble glass adhesive.

Composite briquette, its component and weight proportion are as follows: biomass fuel 60～85, hard coal 12～35, soluble glass adhesive 3～5.

The production method of above-mentioned composite briquette, comprise the steps: biomass fuel, hard coal, three kinds of raw material pulverizing of soluble glass adhesive are prepared by weight, the raw material stirring after preparing mixes, be pressed into moulded coal through the moulded coal press, moulded coal be presented to carry out the charing processing in the charring furnace again.

Because this composite briquette, its component is the propellant combination of hard coal and biomass fuel, catch fire easily, combustion time is long, the cohesive force intensity of water glass is higher, and the main component after the water glass sclerosis is a silicon gel solid, and specific surface area is big, thereby has a higher cohesive force, in transportation and use, be difficult for fragmentation, and the water glass good heat resistance, the silicon-dioxide mesh skeleton of sclerosis back formation, at high temperature, the strength degradation amplitude is little, and in combustion processes, flame is inwardly invaded from the moulded coal outside surface, after carbon is burned, silicon gel and ash content form cellular a supporting, and composite briquette and composite briquette be good permeability each other, and burning fully.

With this composite briquette be presented to carry out charing in the charring furnace and handle after, the composite briquette skin forms the monocoque layer through charing, has increased the intensity of composite briquette, during the composite briquette charing, contained volatile matter is overflowed in a large number, over-emitting black exhaust when avoiding the composite briquette burning.

Embodiment:

Get 65 kilograms biomass fuel (plant straw, shell, fruit stone, forestry tankage, bark, wood sawdust etc.) oven dry, pulverize, get 30 kilograms hard coal and pulverize; Get 5 kg of water glass, above-mentioned three kinds of raw materials are put into stirrer mix, above-mentioned mixed raw materials is moved on in the coal press machine, be pressed into the moulded coal of setting.Again moulded coal is moved on to and carry out charing in the charring furnace, earlier furnace temperature is risen to 280 ℃ of degree and kept this temperature 2 hours.Move on to again in 500 ℃ of charring furnaces, kept this temperature 4 hours; Move on to again in 600 ℃ of charring furnaces, kept this temperature 1.5 hours.Shifting out charring furnace cools off, packs.

Claims

1, a kind of composite briquette is characterized in that: its component is biomass fuel, hard coal, soluble glass adhesive.

2, by the described composite briquette of claim 1, it is characterized in that: its component and weight proportion are as follows: biomass fuel 60～85, hard coal 12～35, soluble glass adhesive 3～5.

3, a kind of production method of composite briquette, it is characterized in that: comprise the steps: biomass fuel, hard coal, three kinds of raw material pulverizing of glue paste, after preparing by weight, raw material stirring after preparing mixes, be pressed into moulded coal through the moulded coal press, composite briquette be presented to carry out the charing processing in the charring furnace again.