CN103131507A - Cement plant coal combustion-supporting formulation method - Google Patents
Cement plant coal combustion-supporting formulation method Download PDFInfo
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- CN103131507A CN103131507A CN2013100561849A CN201310056184A CN103131507A CN 103131507 A CN103131507 A CN 103131507A CN 2013100561849 A CN2013100561849 A CN 2013100561849A CN 201310056184 A CN201310056184 A CN 201310056184A CN 103131507 A CN103131507 A CN 103131507A
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Abstract
The invention discloses a cement plant coal combustion-supporting material formulation method. The material is composed of the components of, by weight, 50-70% of manganese ore, 10-20% of potassium carbonate, 5-20% of ammonium nitrate, 10-20% of aluminum powder, 10-20% of potassium chlorate, and 10-30% of a clinker sintering aid, wherein the total amount of the components is 100% by weight, and manganese dioxide content in manganese ore is no lower than 40%. The raw materials of the material provided by the invention can be easily purchased in market. With the formulation, coal can be saved by more than 18%, and sulfur dioxide emission can be reduced by more than 90%.
Description
Technical field
The invention belongs to combustion supporting technology field, especially a kind of cement mill coal-fired combustion-supporting compound formulation.
Background technology
Fast development along with national economy, the subsurface storage amount of coal in China also is tending towards the impetus of minimizing rapidly, fat coal is because of excess exploitation and a large amount of outlet, the impetus of its minimizing is particularly serious, and the high sulphur coal inferior of the first sample of image-stone is stayed domestic, bring exceptional hardship because its calorific value hangs down with seriously polluted to industrial production and people's lives, caused serious harm to atmospheric environment simultaneously.From development and strategic perspective, environmental pollution and energy shortage problem have consisted of serious threat to its people's the survival and development, have arrived the stage of solution.
Produce the combustion-supporting agent for fuel coal kind on market a lot of, but really can solve environmental protection in the coal burning process, energy-conservation, etc. problem very little, for example coal-fired insufficient, dust, coking deleterious acidic gaseous emission are not thorough, etc., cause and can not effectively improve thermo-efficiency and sulfurous gas enters atmosphere.
Combustion-supporting agent for fuel coal composition on market is manganese ore and chemical admixture.Manganese ore and chemical admixture acting in conjunction can reduce the burning-point of coal dust, improve the fusing point of coal powder fraction, and at high temperature regulate combustion atmosphere, reach the purpose of the concentrated combustion that promotes low grade coal; But the chemical admixture that adopts relatively is difficult to obtain at nature, and the effect requirements to fire coal is very high in the cement mill, therefore, need a kind of more preferably combustion-supporting compound formulation, can further reduce the burning-point of coal dust, improve the utilising efficiency of coal dust, more be sparing in the use of coal, reduce the discharging of obnoxious flavour.
In view of the foregoing, existing coal-fired combustion-supporting compound formulation needs to improve.
Summary of the invention
The objective of the invention is in order to overcome deficiency of the prior art, a kind of cement mill coal-fired combustion-supporting compound formulation is provided, raw material is easily bought on market, can reach after assembly and economize on coal more than 18%, reduces the above effect of sulphur dioxide emission 90%.
The present invention to achieve these goals, adopt following technical scheme: a kind of cement mill coal-fired combustion-supporting compound formulation, the assembly weight percent is: manganese ore 50-70%, salt of wormwood 10-20%, ammonium nitrate 5-20%, aluminium powder 10-20%, Potcrate 10-20%, grog sintering agent 10-30%, above each component sum by weight ratio are 100%.
Manganese ore 50-60%, salt of wormwood 10-15%, ammonium nitrate 5-10%, aluminium powder 10-20%, Potcrate 10-15%, grog sintering agent 10-20%, above each component sum by weight ratio are 100%.
In manganese ore, the content of Manganse Dioxide is not less than 40%.
The combustion-supporting solid sulfide material is to contain a kind of or combination wherein of cobalt, cadmium, lanthanide rare natural mineral.
Grog sintering agent assembly weight percent is: cobalt oxide 55-70%, and Cadmium oxide 20-40%, lanthanide rare titanium dioxide lanthanum 5-10%, above each component sum by weight ratio are 100%.
The characteristics of catalyticcombustion are to reduce the required activation energy of reaction, and reaction can be carried out at lower temperature.Coal dust is in the stage of catching fire, and main manifestations is release and the burning of volatile matter.Along with most of volatile discharges complete, oxygen on every side is diffused into gradually the coke surface after the coal dust cracking and is penetrated in pore texture, under certain temperature action, oxygen and coke surface carbon and hydrogen effect form carbonic acid gas and water is main product and past external diffusion.In this stage, what promote oxygen and coke fully contacts the after-flame that can improve coal dust.Particularly at the later stage of coal dust firing, due to the consumption of organic carbon, the coal dust volume shrinks gradually, and the ash content in coal dust covers skin gradually, has hindered the further diffusion of oxygen toward coal tar inside, inevitably causes difficult after-flame.
In said components, a series of physicochemical change at high temperature occurs in manganese ore and grog sintering agent, and the Manganse Dioxide in manganese ore and grog sintering agent form solid oxidizing agent potassium permanganate, metal ion (as potassium, sodium) etc.Solid oxidizing agent potassium permanganate can play the oxygenation effect, the situation of local anoxic when changing coal combustion, and heat is concentrated, helps the further burning of coal, then improves the burning of coal rate, subtracts buckwheat coal and effluxes, and reduces atmospheric pollution and energy dissipation; And the humate that contains in metal ion and coal will carry out the alkali exchange and generate the lower humic acid salt of point of ignition, when the hydrocarbon polymer massfraction of these gaseous molecular amounts on coal dust surface reaches certain value, be far longer than heat radiation with the heat release of oxygen combination reaction, make the quickening that is swift in response, formation is caught fire, and has changed the flammability of coal.Simultaneously, the fracture that some metal-salt decomposes is decomposed, and the gaseous state volatile matter is comparatively fast discharged, and has increased inflammable volatile content, thereby has accelerated ignition of coal speed.
In combustion processes, oxygen is constantly from metal to the carbon atom transmission, accelerated the velocity of diffusion of oxygen, be conducive to accelerate the burning of carbon, increase the burnout rate of coal, but metal ion can be combined by the oxy functional groups in coal also, simultaneously in burning also can with the effect of coal mineral, therefore should note content to the impact of catalytic effect when using cement mill coal-fired combustion-supporting compound formulation, be not that volume is The more the better.
The thermal capacitance of the additive such as metallic salt or metal oxide own is little, and can catalysis the fracture of long-chain fat family alkane bond in coal, become the molecule of less, increase the thermal motion of molecule, reduce the thermal capacitance of coal, the heat transmission that has improved coal.The transfer transport theory is started with from the electronic catalytic theory, think that inside that metal ion embeds the carbon lattice changes the microtexture of carbon and as electron donor, by transfer transport accelerating part reactions steps, in addition, metal ion in catalyzer can be activated in heat-processed, thereby occuring to shift, the electronics of himself becomes electron donor, metal ion will form the hole, and the electronic configuration of carbon surface also will change, the migration of this electric charge will speed up some reaction, thereby improved the speed of whole reaction, made and burn more fully.Simultaneously, a kind of inorganic salt in the grog sintering agent are heated microexplosion occur when reaching certain temperature, and the combustiblematerials around making is bulk, increases the oxygen supply area, make fire coal can access burning more fully, and coal fuel heating efficient is significantly improved.
Aluminium powder is subjected to easily to cause microexplosion under high temperature action in coal combustion process, makes the coal cinder cracking be the number fritter under the effect of microexplosion power, it is surperficial that aluminium covers the coal fritter, play katalysis, make the coal surface be easier to carry out chemical reaction with combustion-supporting compound formulation, thereby improved the burnout rate of coal.
Coal produces high temperature when burning, sulphur and oxygen reaction generate sulfurous gas, salt of wormwood and sulfurous gas reaction generate potassium sulfite and carbonic acid gas, potassium sulfite generates vitriolate of tartar with oxygen reaction again, vitriolate of tartar is that grey is block, reduce the quantity discharged that sulfurous gas enters atmosphere, reduced the pollution of obnoxious flavour to atmosphere.
The invention has the beneficial effects as follows: raw material is easily bought on market, can reach and economize on coal more than 18%, reduces the above effect of sulphur dioxide emission 90%.
Add Cadmium oxide can improve the active and stable of raw material, can significantly improve clinker quality after appropriate Cadmium oxide adds, but the excessive grog free calcium oxide that makes of admixture increases, clinker quality descends.
lanthanide series rare-earth elements is the gang's element take lanthanum as representative, has similar outer electronic structure, calcining to grog all has promoter action, lanthanide series rare-earth elements burns till the solid state reaction stage at grog can be by forming intermediate product promotion solid state reaction, in the stage of burning till, silicate minerals has been formed katalysis, can make the carbonate decomposition temperature, the solid state reaction temperature, the decline 10-35 degree such as Ismet Atli formation temperature, reach the time shorten 5-10 second of the degree of burning till equally, when adding lanthanide series rare-earth elements in system, but the abstraction reaction molecule forms reaction activation body, and then change the product molecule into, thereby greatly accelerated the formation speed of mineral, corresponding therewith, mineral form speed, and [quickening of rate impels again the quickening of Potcrate particle diffusive migration speed, the Potcrate that makes new decomposition and produce can form intermediate product with the acidic oxide reaction rapidly, and cause the rapid attenuation of product layer of the carbonate particle that decomposing, and then accelerate again the speed of carbonate decomposition reaction.
In the coal-fired combustion-supporting compound formulation, each component is harmless to calciner, can effectively reduce noxious gas emission by coal-saving burning, therefore, has great economy, society, environmental benefit, can be widely used in the production of cement mill.
Embodiment
The invention will be further described below in conjunction with embodiment:
Embodiment 1
The assembly weight percent is: manganese ore 50-70%, and salt of wormwood 10-20%, ammonium nitrate 5-20%, aluminium powder 10-20%, Potcrate 10-20%, grog sintering agent 10-30%, above each component sum by weight ratio are 100%; In manganese ore, the content of Manganse Dioxide is not less than 40%.
Embodiment 2
Manganese ore 50-60%, salt of wormwood 10-15%, ammonium nitrate 5-10%, aluminium powder 10-20%, Potcrate 10-15%, grog sintering agent 10-20%, above each component sum by weight ratio are 100%; In manganese ore, the content of Manganse Dioxide is not less than 40%.
Embodiment 3
The combustion-supporting solid sulfide material is to contain a kind of or combination wherein of cobalt, cadmium, lanthanide rare natural mineral.
Embodiment 4
Grog sintering agent assembly weight percent is: cobalt oxide 55-70%, and Cadmium oxide 20-40%, lanthanide rare titanium dioxide lanthanum 5-10%, above each component sum by weight ratio are 100%.
Claims (5)
1. cement mill coal-fired combustion-supporting compound formulation, it is waited to levy and is: the assembly weight percent is: manganese ore 50-70%, salt of wormwood 10-20%, ammonium nitrate 5-20%, aluminium powder 10-20%, Potcrate 10-20%, grog sintering agent 10-30%, above each component sum by weight ratio are 100%.
2. a kind of cement mill according to claim 1 coal-fired combustion-supporting compound formulation, it is waited to levy and is: manganese ore 50-60%, salt of wormwood 10-15%, ammonium nitrate 5-10%, aluminium powder 10-20%, Potcrate 10-15%, grog sintering agent 10-20%, above each component sum by weight ratio are 100%.
3. a kind of cement mill according to claim 1 coal-fired combustion-supporting compound formulation, it is waited to levy and is: in manganese ore, the content of Manganse Dioxide is not less than 40%.
4. a kind of cement mill according to claim 1 coal-fired combustion-supporting compound formulation, it is waited to levy and is: the combustion-supporting solid sulfide material is to contain a kind of or combination wherein of cobalt, cadmium, lanthanide rare natural mineral.
5. a kind of cement mill according to claim 1 coal-fired combustion-supporting compound formulation, it is waited to levy and is: grog sintering agent assembly weight percent is: cobalt oxide 55-70%, Cadmium oxide 20-40%, lanthanide rare titanium dioxide lanthanum 5-10%, above each component sum by weight ratio are 100%.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103131508A (en) * | 2013-02-07 | 2013-06-05 | 洛阳大泽节能环保科技有限公司 | Thermal power plant coal combustion-supporting material formulation method |
| CN103131509A (en) * | 2013-02-07 | 2013-06-05 | 洛阳大泽节能环保科技有限公司 | Boiler-use coal combustion-supporting material formulation method |
| CN105238495A (en) * | 2015-10-30 | 2016-01-13 | 湖南和易环保科技有限公司 | Additive for eliminating dioxin produced in garbage incineration, and production process and application process thereof |
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| CN101108991A (en) * | 2007-09-12 | 2008-01-23 | 何丹 | Energy-saving environment protection fire coal additive agent and method of manufacturing the same |
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| CN103131508A (en) * | 2013-02-07 | 2013-06-05 | 洛阳大泽节能环保科技有限公司 | Thermal power plant coal combustion-supporting material formulation method |
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| CN105238495A (en) * | 2015-10-30 | 2016-01-13 | 湖南和易环保科技有限公司 | Additive for eliminating dioxin produced in garbage incineration, and production process and application process thereof |
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Application publication date: 20130605 |