CN103771737B - One utilizes powdered rice hulls and pulverized anthracite to make cement rotary kiln calcined mixed fuel engineering - Google Patents
One utilizes powdered rice hulls and pulverized anthracite to make cement rotary kiln calcined mixed fuel engineering Download PDFInfo
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- CN103771737B CN103771737B CN201410027176.6A CN201410027176A CN103771737B CN 103771737 B CN103771737 B CN 103771737B CN 201410027176 A CN201410027176 A CN 201410027176A CN 103771737 B CN103771737 B CN 103771737B
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- rice hulls
- rotary kiln
- powdered rice
- coal
- rice husk
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
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- Solid Fuels And Fuel-Associated Substances (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
A kind of hybrid fuel technology utilizing powdered rice hulls and pulverized anthracite to do cement rotary kiln calcining, that rice husk is ground into powdered rice hulls in pulverizer, rice husk pulverizer discharge nozzle access kiln hood coal mill system, powdered rice hulls after pulverizing sends into propellant combination storehouse after sucking bag filter by the exhaust blower of coal mill system and entering the pulverized anthracite mixed collection of bag filter simultaneously, and propellant combination is delivered to decomposing furnace and rotary kiln end burner combustion by recycling spiral pump respectively; The material of pulverized anthracite preparation system and rice husk crushing system is pumped and is collected and completed by an air box impulse bagroom and an exhaust blower, and purified gas enters air by exhaust blower by chimney.Mix the propellant combination that powdered rice hulls and hard coal make effectively to reduce the point of ignition of fuel and burn temperature, because non-complete combustion of fuel phenomenon greatly reduces, therefore the calcining hear rate of cement clinker obviously reduces.Adopt this technique more easily to be mixed in hard coal by pulverizing rice husk and make propellant combination, be particularly suitable for new dry process rotary kiln calcining.<b />
Description
Technical field
The present invention relates to a kind of cement rotary kiln calcined mixed fuel engineering, particularly one utilizes powdered rice hulls and pulverized anthracite to make cement rotary kiln calcined mixed fuel engineering.
Background technology
For a long time, China's cement rotary kiln burning silicate cement clinker is fuel used is all bituminous coal, and the vast southern area of China lacks high-quality bituminous coal, but hard coal rich reserves, therefore, southern area cement production enterprise is studied and trial hard coal substitutes bituminous coal and makes fuel calcination of cement clinker one after another in recent ten years, and obtains certain achievement.But hard coal is made cement rotary kiln fuel and be there is kindling temperature and burn temperature high, the shortcoming that combustionvelocity is slow, combustion conditions in the decomposing furnace of particularly precalciner kiln is poor, raw material will absorb amount of heat in Decomposition of Calcium Carbonate process, very unfavorable to anthracite combustion, because exotherm rate is slow, heat absorption speed is fast, causes in-furnace temperature can not meet calcining requirement.
South China area rice husk aboundresources, rice husk has the thermal value of more than 13000kJ/Kg, and kindling temperature is low, combustionvelocity is fast, mix in hard coal after rice husk is pulverized and make propellant combination and can significantly improve anthracite combustion characteristic, the calcining requirement of cement rotary kiln particularly precalciner kiln can be reached.The invention provides a kind of technique utilizing powdered rice hulls and pulverized anthracite to make cement rotary kiln calcined mixed fuel, adopt this technique more easily to be mixed in hard coal by pulverizing rice husk and make propellant combination, be particularly suitable for new dry process rotary kiln calcining.
Summary of the invention
The present invention is that the one that anthracite ignition temperature is high in order to overcome, combustionvelocity proposes slowly utilizes powdered rice hulls and pulverized anthracite to make cement rotary kiln calcined mixed fuel engineering.
The technical solution adopted in the present invention is:
The rice husk be stored in rice husk storehouse feeds rice husk pulverizer and is ground into the fine particle powdered rice hulls being less than 0.8mm after belt scale metering, and the hard coal be stored in run coal bin feeds coal mill and is milled to 0.08mm square hole sieve and tails over and be less than 1% after belt scale metering.Rice husk pulverizer discharge nozzle access kiln hood coal mill system, powdered rice hulls after pulverizing is sent in two propellant combination storehouses by worm conveyor or rigidity impeller feeding machine after sucking bag filter by the exhaust blower of coal mill system and entering the pulverized anthracite mixed collection of bag filter simultaneously, propellant combination is delivered in two spiral pumps via locking wind feeding machine by two bilobed wheels after two rotor weigher meterings respectively, provides high-pressure blast that propellant combination is delivered to decomposing furnace and rotary kiln end burner combustion respectively by two roots blowers.The material of coal dust preparation system and rice husk crushing system is pumped and is collected and completed by an air box impulse bagroom and an exhaust blower, and purified gas enters air by exhaust blower by chimney.
The per-cent accounting for fuel total mass according to anthracite combustion character powdered rice hulls different from the price economy of two kinds of fuel is 10% ~ 50%, generally can obtain the effect obviously improving anthracite combustion characteristic when powdered rice hulls volume is 10% ~ 20% ratio.
Rice husk pulverizer of the present invention can be the one in droplet-shaped beater disintegrating machine, hammer type feedstuff crasher and birotor beater disintegrating machine.
Coal mill of the present invention can be the one in vertical mill, ball mill and air swept ball mill.
The invention has the beneficial effects as follows: mix the propellant combination that powdered rice hulls and hard coal make and effectively can reduce the point of ignition of fuel and burn temperature, because non-complete combustion of fuel phenomenon greatly reduces, therefore the calcining hear rate of cement clinker obviously reduces; Rice husk and the coal dust hybrid technique system of the present invention's design can make the distribution of powdered rice hulls in bagroom reasonable, inhale gentlier therefore more because of powdered rice hulls and drop on dust-precipitator exit end, the powdered rice hulls entering into decomposing furnace fuel bunker is more, and rice husk distribution is relatively less in the kiln hood fuel bunker of dust-precipitator entrance end, this feature and decomposing furnace with turn round the needs of kiln hood to fuel combustion characteristics and adapt.
Accompanying drawing explanation
Fig. 1 is that rice husk of the present invention is pulverized and coal dust preparation system process flow sheet;
In figure: 1. coal bunker, 2. weighing belt, 3. coal mill, 4. rice husk storehouse, 5. rice husk pulverizer, 6. bag filter, 7. propellant combination storehouse, 8 rotor weighers, 9. bilobed wheel lock wind feeding machine, 10. roots blower, 11 spiral pumps, 12 exhaust blowers, 13. chimneys, 14. electric butterfly valves.
Embodiment
embodiment 1:
1 be described as follows by reference to the accompanying drawings:
Be stored in hard coal in run coal bin (1) by 90% total fuel mass be milled to 0.08mm square hole sieve and tail over than feeding coal mill (3) after weighing belt (2) metering and be less than 1%.Be stored in rice husk in rice husk storehouse (4) by 10% total fuel mass be ground into than feeding rice husk pulverizer (5) after weighing belt (2) metering the powdered rice hulls being less than 0.8mm, rice husk pulverizer discharge nozzle access kiln hood coal mill system, powdered rice hulls after pulverizing is sent in two propellant combination storehouses (7) by worm conveyor or rigidity impeller feeding machine after sucking dust-precipitator (6) by the exhaust blower of coal mill system and entering the pulverized anthracite mixed collection of dust-precipitator simultaneously, propellant combination is delivered in two spiral pumps (11) via locking wind feeding machine (9) by bilobed wheel after two rotor weigher (8) meterings respectively, there is provided high-pressure blast that propellant combination is delivered to decomposing furnace and rotary kiln end burner combustion respectively by two roots blowers (10).The material of coal dust preparation system and rice husk crushing system is pumped and is collected and completed by an air box impulse bagroom and an exhaust blower, and purified gas enters air by exhaust blower (12) by chimney (13).Propellant combination prepared by this embodiment can reduce kindling temperature about 100 DEG C compared with hard coal, reduces fuel and burns temperature about 80 DEG C, reduce burning clinker of cement hear rate about 5%.
embodiment 2:
In embodiment 1 powdered rice hulls and anthracitic mass ratio are adjusted to 2 ︰ 8 by 1 ︰ 9, other technique and embodiment 1 are together.Compared with hard coal fuel, kindling temperature about 120 DEG C can be reduced, reduce fuel and burn temperature about 100 DEG C, reduce burning clinker of cement hear rate about 10%.
embodiment 3:
In embodiment 1 powdered rice hulls and anthracitic mass ratio are adjusted to 3 ︰ 7 by 1 ︰ 9, other technique and embodiment 1 are together.Compared with hard coal fuel, kindling temperature about 150 DEG C can be reduced, reduce fuel and burn temperature about 150 DEG C, reduce burning clinker of cement hear rate about 15%.
Claims (4)
1. utilize powdered rice hulls and pulverized anthracite to make a cement rotary kiln calcined mixed fuel engineering, it is characterized in that:
The rice husk be stored in rice husk storehouse feeds rice husk pulverizer and is ground into the fine particle powdered rice hulls being less than 0.8mm after belt scale metering, and the hard coal be stored in run coal bin feeds coal mill grinding and tails over to 0.08mm square hole sieve and be less than 1% after belt scale metering; Rice husk pulverizer discharge nozzle access kiln hood coal mill system, powdered rice hulls after pulverizing is sent in two propellant combination storehouses by worm conveyor or rigidity impeller feeding machine after sucking bag filter by the exhaust blower of coal mill system and entering the pulverized anthracite mixed collection of bag filter simultaneously, propellant combination is delivered in two spiral pumps via locking wind feeding machine by two bilobed wheels after two rotor weigher meterings respectively, there is provided high-pressure blast that propellant combination is delivered to decomposing furnace and rotary kiln end burner combustion respectively by two roots blowers
The material of coal dust preparation system and rice husk crushing system is pumped and is collected and completed by an air box impulse bagroom and an exhaust blower, and purified gas enters air by exhaust blower by chimney.
2. one according to claim 1 utilizes powdered rice hulls and pulverized anthracite to make cement rotary kiln calcined mixed fuel engineering, it is characterized in that: the per-cent that described powdered rice hulls accounts for powdered rice hulls and hard coal fuel total mass is 10% ~ 50%.
3. one according to claim 1 utilizes powdered rice hulls and pulverized anthracite to make cement rotary kiln calcined mixed fuel engineering, it is characterized in that: described rice husk pulverizer is the one in droplet-shaped beater disintegrating machine, hammer type feedstuff crasher and birotor beater disintegrating machine.
4. one according to claim 1 utilizes powdered rice hulls and pulverized anthracite to make cement rotary kiln calcined mixed fuel engineering, it is characterized in that: described coal mill is the one in vertical mill, ball mill and air swept ball mill.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410027176.6A CN103771737B (en) | 2014-01-22 | 2014-01-22 | One utilizes powdered rice hulls and pulverized anthracite to make cement rotary kiln calcined mixed fuel engineering |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410027176.6A CN103771737B (en) | 2014-01-22 | 2014-01-22 | One utilizes powdered rice hulls and pulverized anthracite to make cement rotary kiln calcined mixed fuel engineering |
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| Publication Number | Publication Date |
|---|---|
| CN103771737A CN103771737A (en) | 2014-05-07 |
| CN103771737B true CN103771737B (en) | 2016-01-20 |
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| CN201410027176.6A Expired - Fee Related CN103771737B (en) | 2014-01-22 | 2014-01-22 | One utilizes powdered rice hulls and pulverized anthracite to make cement rotary kiln calcined mixed fuel engineering |
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| CN114477811A (en) * | 2020-11-10 | 2022-05-13 | 四川隆盛欣建筑工程有限公司 | Treatment system and treatment method for solid material of electrolytic aluminum |
| CN115650612B (en) * | 2022-10-24 | 2024-01-12 | 天津水泥工业设计研究院有限公司 | Cement kiln system adopting hydrogen energy coupling alternative fuel and operation method thereof |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101215485A (en) * | 2007-11-02 | 2008-07-09 | 吴飞龙 | Fuel for firing into rotary kiln cement clinker |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101215485A (en) * | 2007-11-02 | 2008-07-09 | 吴飞龙 | Fuel for firing into rotary kiln cement clinker |
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