CN1800323A

CN1800323A - Stalk forming charcoal for boiler

Info

Publication number: CN1800323A
Application number: CN 200510107352
Authority: CN
Inventors: 林振衡; 康全德
Original assignee: FUYUAN CARBON INDUSTRY Co Ltd SHANGQIU CITY
Current assignee: Shangqiu Sanli New Energy Co., Ltd.
Priority date: 2005-12-29
Filing date: 2005-12-29
Publication date: 2006-07-12

Abstract

The invention relates to a stove used stalk shaped charcoal which uses stalk charcoal as main material and adds clogging extraction charcoal agent and is formed by mechanism agent pressing. It is a stalk charcoal which is made by stalk as main material in the field of renewable sources of energy.

Description

Stalk forming charcoal for boiler

One, technical field

The present invention relates to a kind of is the boiler oil of main raw material with stalk charcoal or charcoal, be specifically a kind of be main raw material with stalk powdered carbon or wood charcoal powder, be equipped with subsidiary material, the boiler special fuel charcoal that processes.

Two, background technology

At present, boiler oil is mainly based on coal, but coal easily produces a large amount of black smokes and hazardous compound gas contamination environment, especially coal sulphur content height in combustion processes, and the sulfur dioxide gas that the burning back produces is very big to ecotope and people's Health hazard.According to environmental requirement, now a lot of big and medium-sized cities begin to forbid bunker coal, require boiler to use other clean fuel instead.At present mainly contain following three kinds in order to the mode that substitutes boiler traditional fuel coal: 1, with electricity substituted coal, but the energy value height, boiler is more than 7 times of coal with the electricity for the heat energy operating cost; 2, substitute coal with diesel oil, diesel oil is the price height not only, and belongs to Nonrenewable resources, lacks sustainability, and boiler is that fuel cost is more than 5 times of coal with diesel oil; 3, substitute coal with pipe gas, the boiler operating cost is more than 6 times of coal, and resource also lacks sustainability.In addition, more than the mode of three kinds of alternative bunker coals, though solved pollution problem, with high costs, and can not be general with existing coal firing boiler, all need change, increase input, all directly or indirectly consume Nonrenewable resources simultaneously, lack sustainability.

Agricultural crop straw is a huge renewable energy source resource, utilizes stalk to change into charcoal and substitutes boiler fuel, and be a technology of benefiting the nation and the people.At present, Chinese agriculture has more than 1,900,000,000 mu in arable land, consider to remove the non-proportion of crop planting factor in a small part soil, about 0.5 ton of stalk is produced on average every mu of ground per year, about more than 900,000,000 tons of agricultural crop straw is produced in the whole nation per year, but 1 ton of charcoal is produced in 3 tons of stalk charings, changes into charcoal by half stalk, can produce more than 1.5 hundred million ton of straw charcoal.Calculate by thermal value, one ton of straw charcoal can replace one ton of Industrial Boiler coal fully, annual more than 6000 ton in the coal that consumes of four tons of Industrial Boiler runnings at full capacity, 1.5 hundred million tons of straw charcoals can be for the annual running at full capacity of more than 20,000 four tons of Industrial Boiler, annual 1.5 hundred million tons of the consumption coals that reduce are equivalent to 7.5% of 2,000,000,000 tons of China's year producing coals approximately.

Though also there is the application of some stalk charcoals and charcoal in China at present, but it is civilian mostly many, and industrial application seldom, though the stalk charcoal is seldom obnoxious flavour discharge in combustion processes, but can cause ash to fly upward after its burning, can't be directly used in Industrial Boiler, so, do not use it for industrial fuel in a large number as a kind of energy.

Three, summary of the invention

The object of the present invention is to provide a kind of stalk charcoal that utilizes to add the stalk forming charcoal that the solid grey agent of slagging scorification is made for main raw material, special fuel as Industrial Boiler, not only cost is relatively low, burning is cleaner for this stalk forming charcoal, it is low to pollute, resource has recyclability, and coal firing boiler need not improve and can directly use at present.

Technical scheme of the present invention is such:

Stalk forming charcoal for boiler is to add the stalk forming charcoal that the solid grey agent of slagging scorification forms through mechanical presses by stalk charcoal or charcoal; Consider and to guarantee normal thermal value, guarantee that again the stalk charcoal does not make ash fly upward and contaminate environment in combustion processes, so the content of stalk charcoal or charcoal is selected 70%-90% in prescription of the present invention, the content of the solid grey agent of slagging scorification is selected 10-30% (being weight percentage).

Because of stalk charcoal and charcoal are all formed by xylogen and Mierocrystalline cellulose charing, its essential performance is identical, so all can with stalk charcoal and charcoal in the solution of the present invention.

The solid grey agent of slagging scorification can be by multiple choices, and it is preferred plan that the present invention has following three kinds of schemes, and the one, adopt pure clay to do the solid grey agent of slagging scorification, consumption is 10-30%; The 2nd, adopt washed kaolin to do the solid grey agent of slagging scorification, consumption is 10-15%; The 3rd, adopt clay and kaolinic mixture to do the solid grey agent of slagging scorification, clay comprises 70-80%, kaolin accounts for 20-30%, and clay and kaolinic amount of mixture are 10-20%.

In order to increase the intensity of stalk forming charcoal for boiler of the present invention, make it conveniently move and transport, and don't as for move with transportation in broken, in prescription of the present invention, can add a spot of tackiness agent to increase the intensity of its charcoal ball, because the tackiness agent kind is a lot, but consider factors such as cost, environmental protection, this programme has been selected starch adhesives, the Starch Adhesive that preferably adopts the ripe method of heating method or alkali to produce, because of this class tackiness agent not sulfur-bearing and chlorine, it is suitable that consumption is generally selected the 2-8% of stalk charcoal and the solid grey agent total amount of slagging scorification.

Positively effect of the present invention is: 1, obviously reduce than other fuel or cost of electric energy that is used for boiler beyond the coal, it is with more than 5 times of coal cost that boiler electricity consumption, diesel oil, pipe gas are made the cost of the energy minimum, only is about 3 times of coal-fired cost and use stalk forming charcoal of the present invention; 2, stalk forming charcoal of the present invention and coal facies ratio, be than clean fuel, because of the stalk charcoal is that stalk forms through high temperature carbonization, the carbon content height, objectionable impurities has been decomposed discharge in the high temperature carbonization process, sulphur content is few, after grey agent is consolidated in the adding slagging scorification in the stalk charcoal, slag tap, ash is few, and common dust removal installation is the fine solution dust removal problem of energy just, and discharge meets city fuel ring guaranteed request, 3, stalk forming charcoal of the present invention, main raw material is the stalk charcoal, belongs to the recyclable organism energy, has sustainability, it is more than needed also to have solved simultaneously straw from village, and burning straw causes environmental pollution problems; 4, stalk forming charcoal of the present invention can directly use on existing coal firing boiler, does not need to change boiler, can save equipment investment cost than using other energy kind instead.

Four, embodiment

It is broken to get the 85kg stalk powdered carbon, and it is standby to cross 40 mesh sieves; Get 3kg kaolin, the 12kg clay is dried pulverizing respectively, it is standby to cross 60 mesh sieves; Get 5kg Starch Adhesive (market is on sale).Above four kinds of raw materials are dropped into stirrer, add 10kg water mixing and stirring again, become moist shape powdered carbon mixture, send into the agent of shaper machinery then and be pressed into spherical, the balling-up external form can select for use different moulds to adjust with size on demand, and general diameter is 30-80mm; The forming charcoal ball is sent into the drying plant oven dry, last quantitative package warehouse-in.

It is common baking room or drying kiln that the stalk forming charcoal for boiler course of processing of the present invention is dried institute's use equipment; Shaper is general coal dust ball machine.

Claims

1, stalk forming charcoal for boiler is characterized in that: it is to add the stalk forming charcoal that the solid grey agent of slagging scorification forms through mechanical presses by stalk charcoal or charcoal; The content of stalk charcoal or charcoal is 70-90% (weight percentage), and the solid grey agent of slagging scorification is 10-30% (weight percentage).

2, stalk forming charcoal for boiler according to claim 1 is characterized in that: the employing of the solid grey agent of slagging scorification has three kinds of schemes: the one, adopt pure clay, and consumption is 10-30%; The 2nd, adopt washed kaolin, consumption is 10-15%; The 3rd, adopt clay and kaolinic mixture, clay can account for 70-80%, and kaolin can account for 20-30%, and consumption is 10-20%.

3, stalk forming charcoal for boiler according to claim 1 is characterized in that: the tackiness agent that can add the solid grey agent total amount 2-8% of stalk charcoal and slagging scorification.

4, stalk forming charcoal for boiler according to claim 3 is characterized in that: the Starch Adhesive that tackiness agent selects for use heating method or the ripe method of alkali to produce.