High-efficiency coal catalyst and preparation method thereof
Technical field
The present invention relates to a kind of coal combustion catalyst and preparation, particularly a kind of high-efficiency coal catalyst and preparation method thereof.
Background technology
Coal is important energy and industrial chemicals, and it is non-renewable resource.In recent years, because global oil crisis and resource exhaustion, energy-saving and emission-reduction had become the task of top priority that is becoming tight many national coping resources days.China is that big coal country consumes coal big country, and the coal overwhelming majority of producing is used for direct burning.But there are a series of problems such as the difficulty of catching fire, efficiency of combustion is low, environmental pollution is serious in coal in combustion process, therefore improves the efficient of coal combustion, reduces ignition temperature, reduces the most important thing that environmental pollution becomes China's energy-saving and emission-reduction work.
Except present more common improvement combustion apparatus and technology, people also study and draw the use coal combustion additive also is the effective measures that realize the coal high performance clean burning.Catalyst to the fugitive constituent precipitation rate that improves coal, reduce ignition temperature, increase burning velocity, improve burnout rate etc. influence is all arranged.Additive for fire coal can improve the burning of coal characteristic.Improve burning of coal efficient, the amount of being sparing in the use of coal.Can reduce the discharge capacity of pollutant again, have very realistic meanings.
Coal initial experience moisture content in receiving thermal process is separated out, and fugitive constituent is separated out, and simultaneously with inner chemical reaction process, when temperature reached ignition temperature, the thermal discharge of the inner chemical reaction of coal was greater than heat dissipation capacity, and coal takes fire.Igniting temperature of pulverized-coal is low more, and it is easy more to burn, and seems particularly important so how to reduce coal-fired ignition temperature.China is world's producing coal and uses coal big country that annual coal consumption reaches hundred million tons of hundreds ofs, in order to make catalyst better prospects for commercial application can be arranged, and must seek cheap coal combustion catalyst.
Mainly of the catalytic combustion effect of research pure chemistry material in the inventing type patent in the past to coal.Consider the practicality and the economy of catalyst, catalyst how to develop a kind of cheapness seems particularly important.
Summary of the invention
The technical problem that the present invention will solve is that high-efficiency coal catalyst a kind of cheapness, that have good prospects for commercial application and preparation method thereof is provided.Be the technical solution problem, technical scheme provided by the invention is:
A kind of high-efficiency coal catalyst is provided, and is that salt slurry, cadmia and the slag of 50um~200um forms through dry mixed by particle diameter, and each component weight percent content is: salt slurry 40%~60%, cadmia 25%~40%, slag 10%~30%;
Active ingredient that each component contains and the active ingredient weight percent content in this component is respectively:
In the salt slurry, NaCl is 15%~25%;
In the cadmia, Fe
2O
3Be 25%~35%, Fe
3O
4Be 25%~35%, ZnO is 10%~20%, and ZnS is 3%~9%;
In the slag, Fe
2O
3Be 15%~25%, Fe
3O
4Be 10%~20%, CaO is 40%~50%, Al
2O
3Be 5%~15%.
The present invention further provides the method for preparing aforementioned high-efficiency coal catalyst, comprises step:
(1) place ball mill to pulverize respectively in said salt slurry, cadmia and slag, being milled to particle diameter is 50um~200um;
(2) powder of salt slurry, cadmia and slag is even by said mixed.
The present invention also provides the method for the aforementioned high-efficiency coal catalyst of another kind of preparation, comprises step: said salt slurry, cadmia and slag are added in the ball mill in said ratio pulverize, being milled to particle diameter is 50um~200um.
Realization of the present invention is based on principle:
The coal combustion catalytic mechanism is divided into two kinds haply, and first kind for oxygen transmits theory, thinks that catalyst at first is reduced into metal under the heating condition, and metal adsorption oxygen obtains metal oxide, and metal is in the redox circulation, has accelerated the diffusion of oxygen.Second kind is electronics transfer theory, thinks that metal ion embeds the carbon intracell, and the carbon surface electronic structure changes, and as electronq donor, through electric charge migration accelerating part reactions step.The combustion-supporting effect of catalyst depends on its contained material.See that from chemical composition coal combustion catalyst can be divided into: the oxide of alkaline-earth metal, alkali metal, rare earth and transition metal, hydroxide and its esters, like K
2CO
3, FeCl
3, FeCl
2, Na
2CO
3, Ca (OH)
2, CaO, NaCl, K
2MnO
3And Fe
2O
3Deng.
Therefore, the invention has the beneficial effects as follows:
The present invention is the coal combustion catalyst of raw material with the trade waste, the fugitive constituent precipitation rate of raising coal that can be by a relatively large margin, reduce coal ignition temperature, increase coal combustion speed.The present invention can not only have the characteristics of energy-conserving and environment-protective with utilization of waste as resource, and Cheap highly effective, and favorable industrial application prospect is arranged.
Behind the catalyst in using the present invention; Not only can effectively practice thrift the coal use amount; And improve the coal combustion value, increased the burnout rate of coal, particularly reduced low-volatile anthracite ignition temperature; Improve the not fire-hazardous deficiency of low-volatile anthracite, thereby improved the use of coal greatly.
The specific embodiment
Below in conjunction with the specific embodiment the present invention is described in further detail:
Should use in the instance, salt slurry is taken from Shandong seaization limited company Sodium Carbonate Plant, Dan Xia smeltery, the golden south of the Five Ridges during cadmia is taken from, and slag is taken from Laigang, Shoudu Iron and Steel Co and is made steel remaining vessel slag, is trade waste, and its cost can be ignored.
High-efficiency coal catalyst among the present invention is that salt slurry, cadmia and the slag of 150um~200um forms through dry mixed by particle diameter, and each component weight percent content is: salt slurry 40%~60%, cadmia 25%~40%, slag 10%~30%;
Active ingredient that each component contains and the active ingredient weight percent content in this component is respectively: in the salt slurry, NaCl is 15%~25%; In the cadmia, Fe
2O
3Be 25%~35%, Fe
3O
4Be 25%~35%, ZnO is 10%~20%, and ZnS is 3%~9%; In the slag, Fe
2O
3Be 15%~25%, Fe
3O
4Be 10%~20%, CaO is 40%~50%, Al
2O
3Be 5%~15%.
Should use in the instance, the preparation of high-efficiency coal catalyst can realize through following manner: (1) places ball mill to pulverize respectively in said salt slurry, cadmia and slag, and being milled to particle diameter is 50um~200um; (2) powder of salt slurry, cadmia and slag is even by said mixed, obtain catalyst.
Certainly, also can adopt the preparation method of simplifying more: salt slurry, cadmia and slag are added in the ball mill in said ratio pulverize, being milled to particle diameter is 50um~200um, obtains catalyst.
It in the table 1 related data of each specific embodiment.
Table 1:
The embodiment sequence number |
The percentage by weight (%) of salt slurry in catalyst |
The percentage by weight (%) of cadmia in catalyst |
The percentage by weight (%) of slag in catalyst |
Catalyst 1 |
40 (in salt slurry, NaCl is 25%) |
40 (in cadmia, Fe
2O
3Be 35%, Fe
3O
4Be 27%, ZnO is 18%, and ZnS is 9%)
|
20 (in slag, Fe
2O
3Be 15%, Fe
3O
4Be 20%, CaO is 50%, Al
2O
3Be 15%)
|
Catalyst 2 |
45 (in salt slurry, NaCl is 21%) |
25 (in cadmia, Fe
2O
3Be 25%, Fe
3O
4Be 25%, ZnO is 10%, and ZnS is 7%)
|
30 (in slag, Fe
2O
3Be 25%, Fe
3O
4Be 15%, CaO is 40%, Al
2O
3Be 5%)
|
Catalyst 3 |
60 (in salt slurry, NaCl 15%) |
30 (in cadmia, Fe
2O
3Be 31%, Fe
3O
4Be 35%, ZnO is 20%, and ZnS is 3%)
|
10 (in slag, Fe
2O
3Be 18%, Fe
3O
4Be 10%, CaO is 43%, Al
2O
3Be 7%)
|
The Application of Catalyst instance:
According to 0.2%, 0.5%, 1% and 2% mass ratio evenly mixes with Yunnan-Guizhou anthracite and Fujian anthracite with 3 kinds of catalyst, carries out the thermobalance test, adds catalyst to two kinds of anthracite ignition Influence of Temperature thereby draw.
Below each the table in be the related data of each specific embodiment.
Catalyst 1 ratio |
0 (catalyst-free) |
0.2% |
0.5% |
1% |
2% |
Yunnan-Guizhou anthracite ignition temperature |
?549 |
535 |
528 |
526 |
525 |
Fujian anthracite ignition temperature |
?597 |
590 |
585 |
582 |
580 |
Catalyst 2 ratios |
0 (catalyst-free) |
0.2% |
0.5% |
1% |
2% |
Yunnan-Guizhou anthracite ignition temperature |
?549 |
531 |
524 |
522 |
520 |
Fujian anthracite ignition temperature |
?597 |
587 |
585 |
580 |
577 |
Catalyst 3 ratios |
0 (catalyst-free) |
0.2% |
0.5% |
1% |
2% |
Yunnan-Guizhou anthracite ignition temperature |
?549 |
540 |
535 |
532 |
525 |
Fujian anthracite ignition temperature |
?597 |
595 |
591 |
585 |
580 |
What more than announce at last, only is specific embodiment of the present invention.All distortion that those of ordinary skill in the art can directly derive or associate from content disclosed by the invention all should be thought protection scope of the present invention.