CN85109106A - Direct auto-heating carbonization of rice husk - Google Patents
Direct auto-heating carbonization of rice husk Download PDFInfo
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- CN85109106A CN85109106A CN 85109106 CN85109106A CN85109106A CN 85109106 A CN85109106 A CN 85109106A CN 85109106 CN85109106 CN 85109106 CN 85109106 A CN85109106 A CN 85109106A CN 85109106 A CN85109106 A CN 85109106A
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- rice husk
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Abstract
The present invention relates to a kind of charred rice husk method, particularly a kind of direct auto-heating carbonization of rice husk.Part or most of volatile matter heat release with combusting rice hull itself realize carbonization process.Adopt dry type cooling and air cooling technique suddenly, thereby simplify technical process, and make product not contain harmful moisture content.Also adopt the air ejection device in addition, add rice husk in the stove continuously and automatically and finish charring rice husk and finally cool off.Equipment is simple, easy to operate, product quality is high.
Description
The present invention relates to a kind of charred rice husk method, particularly a kind of direct auto-heating carbonization of rice husk.Charing is facilitated in part or most of volatile matter heat release with combusting rice hull itself.Adopt dry type cooling and air cooling technique suddenly, thereby simplified technical process, and make product not contain harmful moisture content.Also adopt the air ejection device in addition, add rice husk in the stove continuously and automatically and finish charring rice husk and finally cool off.
The present invention's rice husk is a raw material, produces charring rice husk, in order to cover the motlten metal liquid level, is good heat preserving agent, is again the heat-barrier material that is used to build.
The production method of charring rice husk has two kinds at present: a kind of is the indirect cracking process; Another kind is direct firing method.The former is contained in rice husk in the container, makes its destructive distillation in container external application fuel indirect, as uses widely different rotary kiln.Be heated to when rice husk in 400～500 ℃ the process, successively volatilize moisture content and volatile matter, what stay at last promptly is charring rice husk.This method is to produce under reducing atmosphere, and in carbonization process, though rice husk can not oxidation, with regard to present technology, this method consume fuel is many, productivity ratio is low, cost is high.Directly firing method is divided two kinds again, first gas generator method, its objective is production coal gas, and the lime-ash of getting rid of with wet method, someone just with this lime-ash when charring rice husk usefulness, rice hull ash in fact just is because its carbon content is low, high humidity and granularity are too thin, make the molten steel covering and heat insulating agent with it, overall economic efficiency is very low.Another is the method that Japan Patent is clear and 49-5839 mentions, i.e. cyclone firing method, and its burner hearth is a upright garden tube, and waste gas is got rid of by top, and charring rice husk is discharged by the bottom, and rice husk pushes with screw feeder, mixes with tangential direction entering burner hearth then with air stream.Have coal gas to burn below air inlet and chew, to improve fire box temperature, raw rice husk is finished charing under oxidizing atmosphere in the rotation dropping process.The charring rice husk of being discharged by the bottom cools off with superheated steam, is processed into active carbon then.The shortcoming of this method is will add coal gas to supply with little part heat, can't produce concerning the place in no coal gas source, and this in fact method is to produce active carbon.
The objective of the invention is not use extra fuel or electric heating method, the heat of putting with part or most of volatile matter of combusting rice hull itself realizes carbonization process, and carbonization process can carry out under reducing atmosphere.In order to simplify technical process and to make product not contain harmful moisture content, adopt the unexpected cooling technology of dry type.Cancelled screw feeder in addition, adopted the air ejection device, raw rice husk has been added in the stove continuously and automatically.Therefore be referred to as direct auto-heating carbonization of rice husk.
Production principle of the present invention and equipment can be described as follows by figure one stove main equipment figure and figure two technological process of production figure.
Raw rice husk is poured former feed bin (8) into from automobile (9), by injection conveyer (10) raw rice husk is delivered to the charging hopper (3) of two symmetries of upper of furnace body with the pneumatic conveying mode.Below charging hopper, raw rice husk is sent into feed pipe (2), be blown into burner hearth (1) by tangential direction then with injection feeder (6).Burner hearth is a upright garden tube, inner lining refractory block.Fill raw rice husk in lower furnace portion during blow-on, form fixed bed, light a fire at burner hearth then.After lighter in the stove and rice husk burning, begin blowing, introduce raw rice husk from feed pipe, raw rice husk is subjected to convection current and radiant heat transfer in the process that falls along helix, its temperature sharply rises, at this moment emit moisture content and part volatile matter, some rice husk grain charings, but major part drops on the fixed bed, finally all finishes charing in fixed bed discharge decline process.But the volatile matter of emitting during charing is exactly a coal gas, just blazes up when the air of it and feeding meets, and makes to reach needed temperature in the burner hearth.
Fire box temperature generally is controlled at 800～1000 ℃, positive and negatively regulates and control furnace temperature with what change speed that the injection air capacity is transportation concentration, discharge and furnace pressure.Experiment showed, that furnace temperature controls easily.The fixed bed temperature generally is controlled at about 500 ℃, and its governing factor is identical with the control fire box temperature with method.
Produce and carry out continuously,, can guarantee the complete charing of rice husk, the charcoal in the charring rice husk is burnt, thereby obtained carbon content height, the neat quality product of particle as long as be malleation and reducing atmosphere and suitable temperature in the control fixed bed.
Be equipped with in lower furnace and take off the prominent device for cooling (17) of discharging, utilize the charring rice husk blackness big, to around the fast and fixed carbon characteristics slowly of burning wherein of radiation heat loss, the charring rice husk of red heat is cooled down suddenly.What is called is taken off the prominent device for cooling of discharging, is manually charring rice husk to be clawed, and enters in the cone of bottom by fire bars spare, and in fact stove garden tube part and its following wimble fraction inside, garden are obstructed.Enter in the lower furnace cone from taking off the material that the prominent device for cooling of discharging comes out, injection discharge apparatus (5) is housed in its lower section, change the chilling temperature that the injection air capacity can be regulated discharge velocity and material.Under the condition of production, be transferred to stable optimum value to it, and cooperate with charging rate.Recoler (14) and (12) also are to utilize the air ejection device that charring rice husk is cooled to the final temperature almost equal with air themperature, and charring rice husk is delivered to finished bin (13) by pans (11).Two following funnels (15) are arranged below the finished bin, and charring rice husk enters paper bag through funnel, and wrapping is transported to warehouse for finished product for finished product (16) then.
The air capacity that air blast (7) is supplied with is reinforced, discharge and pneumatic conveying need.The air capacity available pores plate current flowmeter measurement that needs everywhere, what are regulated by production process for it.With nickel chromium-nickel silicon thermocouple thermometer measure burner hearth, the bed of material, pans and finished bin temperature everywhere.The air of the air of cooling and conveying charring rice husk and conveying charring rice husk is through scattering and disappearing in atmosphere after the dedusting.
The furnace gas that is come out by upper furnace flue (4) generally is a reproducibility, contains a large amount of waste heats, and (not shown) can be used to directly add thermal material after cyclone dust removal, and also available waste-heat recovery device utilizes it, for other technologies provide thermal source.
In sum, the present invention compares with domestic and international prior art and has the following advantages:
(1) owing to adopt the self-heating principle, not only do not want extra fuel, and thermal source can be provided.Produce 2000 tons of charring rice husks per year and can provide per hour 1000 meters
3900～1000 ℃ the thermal source that contains a large amount of coal gas;
(2) owing to adopt strength to carry and cooling, cancelled screw feeder, made that equipment is simple, small investment;
(3) owing to adopt dry type cooling and cyclone dust collectors, make product recovery rate height, water content is low, and it is few to contain powder;
(4) control production process according to gas flow and pressure, easy to operate, control easily;
(5) with low cost, the product quality height.
The industrial implementation example: with the charring rice husk that the rice husk of Anshan Area is produced, its unit weight is 0.1～0.2 gram per centimeter
3, carbon content is 56～61.5%, ash is 38.5～44%.
Claims (4)
1, a kind of charred rice husk method, particularly a kind of direct auto-heating carbonization of rice husk is characterized in that not extra fuel, realizes carbonization process with part or most of volatile matter heat release of combusting rice hull itself.Adopt dry type cooling and air cooling technique suddenly, make product not contain harmful moisture content.Adopt the air ejection device, add rice husk in the stove continuously automatically and finish charring rice husk and finally cool off;
2, method according to claim 1 is characterized in that described carbonization process is a part of raw rice husk along charing in the helix dropping process.But most of rice husk is finally to finish whole charings with the discharge process in the fixed bed of lower furnace portion, therefore designs a specific fixed bed in lower furnace portion;
3, method according to claim 1 is characterized in that the unexpected cooling technology of described dry type is to utilize the big and fixed carbon characteristics slowly of burning wherein of product blackness, has one to take off the prominent device for cooling of discharging in lower furnace;
4, method according to claim 1 is characterized in that described final cooling technology is charring rice husk slowly spontaneous combustion when higher temperatures, therefore adopts the air ejection cooling device twice, and charring rice husk is cooled to normal temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85109106A CN85109106B (en) | 1985-12-12 | 1985-12-12 | Direct auto-heating carbonization of rice husk |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN85109106A CN85109106B (en) | 1985-12-12 | 1985-12-12 | Direct auto-heating carbonization of rice husk |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN85109106A true CN85109106A (en) | 1987-01-31 |
| CN85109106B CN85109106B (en) | 1988-10-19 |
Family
ID=4796244
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN85109106A Expired CN85109106B (en) | 1985-12-12 | 1985-12-12 | Direct auto-heating carbonization of rice husk |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN85109106B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105694927A (en) * | 2014-11-27 | 2016-06-22 | 唐长红 | An apparatus for rice husk carbonization combustion and combustion gas collection-utilization |
| CN107810992A (en) * | 2016-09-13 | 2018-03-20 | 德大生技有限公司 | For manufacturing the method and its granulating unit of natural insecticide |
-
1985
- 1985-12-12 CN CN85109106A patent/CN85109106B/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105694927A (en) * | 2014-11-27 | 2016-06-22 | 唐长红 | An apparatus for rice husk carbonization combustion and combustion gas collection-utilization |
| CN107810992A (en) * | 2016-09-13 | 2018-03-20 | 德大生技有限公司 | For manufacturing the method and its granulating unit of natural insecticide |
| CN107810992B (en) * | 2016-09-13 | 2020-11-03 | 德大生技有限公司 | Method for manufacturing natural pesticide and water quenching device thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN85109106B (en) | 1988-10-19 |
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