KR830002795B1 - Manufacturing method of briquettes and coal briquettes with reduced toxic gas - Google Patents

Abstract

No content.

Description

Manufacturing method of briquettes and coal briquettes with reduced toxic gas

1 is a comparative graph of the indoor carbon monoxide concentration (ppm) according to the types of briquettes (A) of the present invention and conventional briquettes (B), (C) and (D).

In the production of briquettes and altans, the raw materials such as coal, anthracite, and atan include inorganic sulfur compounded with the ash and organic sulfur compounded with the polymer carbonaceous material of coal.

When briquettes and altans are burned, the inorganic minerals mentioned above generally remain in the ash, but organic sulfur is burned to generate sulfur dioxide, ie, sulfur dioxide (SO ₂ ).

Sulfurous acid gas is a colorless gas with an irritating odor, and because of its strong toxicity, it not only has extremely harmful poisons invading the human body, especially its mucous membranes, but also is easily soluble in water, harmful to oxidation catalysts, and significantly lowers its activity. In addition to combustion, inevitably, carbon dioxide (CO ₂ ) combined with oxygen is reduced by carbon or partially oxidized carbon monoxide (CO). The toxicity of this carbon monoxide, as it is known, binds to the hemoglobin in the red blood cells in the blood, making it incapable of transporting oxygen to body tissues, and in some cases, leading to death. Is said to be almost impossible.

The present invention, when burning the toxic gas generated in the coal briquettes and altans, the source of the toxic gas is fixed in the ash with inorganic salts to prevent the generation of toxic gas as possible to reach a safe range that does not harm humans or livestock. For the purpose of

In this method, the main material of red mud (a slightly dehydrated solid is called red soil), which is an industrial waste in the alumina manufacturing process, in particular, is used as a raw material for briquettes and altans. It is prepared by mixing and kneading.

The red mud is a reducible substance containing a large amount of iron oxide, silicon, titanium, etc., and has a capability of absorbing sulfite gas, and is actually a waste product which is rarely used. It is a phenomenon that is thrown away or collected in a storage container.

In this case, the present invention is to use the red mud to achieve the desired object described above.

In this regard, the components of red mud are as follows.

Here, iron oxide absorbs gaseous sulfite, titanium oxide withstands high temperatures and assists iron oxide performance, and soda, lime, and silica absorb emulsion oxides.

In addition to the above-mentioned red mud, the material for use in the present invention is a combustible material that is effective in enhancing cohesiveness, adding bent nitrite having a characteristic of suspending fats and oils well in an emulsified state, and improving flammability and combustibility, and reducing generation of carbon monoxide. Blend.

And when manufacturing using a discharge gas containing 200-300ppm sulfur oxide and maintaining the temperature at 400-500 ℃ reaction was confirmed that the sulfurous acid gas has a windowing effect of 80-90%.

To further reduce the carbon monoxide, the concentration can be considerably thinned by using a furnace for introducing secondary air.

The red soil employed to reduce or remove the toxic gas in the present invention has the following advantages and effects.

(1) As it is industrial waste, it is abundant in materials, so the production cost is low.

(2) There is no fear of heavy metal pollution when disposing of used catalyst.

(3) Withstands the temperature of 700-800 ℃.

(4) It is effective for maintaining sustained combustion time.

(5) It prevents the shape deformation and the manufacturing method is simple.

Next, the Example of this invention is given.

Example 1

The above-mentioned mixing agent is mixed and added to it as it is or an appropriate amount of light oil or kerosene (increase in calorie, increase in flammability), and several holes are made up and down depending on the mold, and pressed hard to be molded.

This can make altan.

Example 2

The above mixture is kneaded as seawater and kneaded by adding an appropriate amount of light oil or kerosene to it, and hardened in the form of an egg. Next, the briquette of the present invention of Example 1 described above is characterized by a characteristic of having a low carbon monoxide temperature while maintaining an average combustion temperature, and briquettes of conventionally used briquettes, such as fine coal clays, which are poisonous gases. Concentration of carbon monoxide in the room by kneading as a reducing agent and caking agent, or by the types of ordinary briquettes, complex briquettes, and matched briquettes containing dolomite plaster, iron oxide powder, and bentite. FIG. 1 is also shown as a graph (same as Altan of Example 2 of the present invention).

Indoor Temperature Measurement of Carbon Monoxide by Briquettes

The wooden prefabricated building, Japanese living room (about 7.43 m ² ), temperature 5 ° C., humidity 60%, and in this state, the number of ventilation of the living room was 0.72 times per hour.

The briquettes (A) and ordinary briquettes (B) of the present invention were ignited by heating for 20 minutes on a gas working, and the ignited briquettes (C) were transferred to a laboratory in a briquette furnace after 1 minute heat ignition, and then delivered to a laboratory. Were put into briquettes and ignited indoors.

In all cases, the carbon monoxide concentration in the room was measured by opening one-third of the vents to the briquette furnace (the average of five replicates of this experiment). The carbon monoxide concentration in the room was the lowest in the briquettes (A) of the present invention, and showed 300 ppm at 40 minutes after ignition, and then slowly decreased after sustaining for about 75 minutes.

The concentration was the highest with the briquette (D), and then rapidly decreased to 1100 ppm at 45-48 minutes.

Ordinary briquettes (B) showed a sharp decrease after showing 800 ppm at 52-53 minutes. The complex briquette (C) was slightly lower than the first two briquettes (B) and (D), showing a 650-680 ppm value, but the concentration was the slowest.

As in the experimental example conventional briquetting (B), (C), (D) is, since the initial combustion temperature is different from the gas fuel or liquid fuel, when a large amount of toxic gas is carbon monoxide (combustion in the initial example SO ₂ However, according to the present invention, the generation of carbon monoxide in the initial combustion can be greatly reduced, and there is an advantage of preventing the occurrence of poisoning by the gas.

The present invention can be carried out as described above, and in the conventional process for producing briquettes or yaltans, an appropriate amount of red mud or reddened powder may be mixed and kneaded by adding a small amount of magnesium ions such as seawater, Combustion is formed by mixing and adding an appropriate amount of kerosene.

Gas sulfite (SO ₂ ) and carbon monoxide (CO) generated by combustion are small as described above. Oxygen bound to iron oxide, aluminum oxide, titanium oxide, etc. in red soil is oxidized at a high temperature of 700-800 ° C. to act as a medium. By reducing the desulfurization to be close to approximately neutral, the concentration is 50ppm in the living room or work place, so the toxicity is almost reduced, the toxicity does not occur to humans or livestock. Therefore, the present invention not only effectively develops unused resources, but also conserves the environment, and prevents the occurrence of poisoning disorders caused by the combustion of conventional briquettes and altans, and provides some ventilation even in indoors with high sealing structure. It can be used safely in the risk industry.

In the current energy-saving and petroleum-saving era, it provides economical alternatives to household goods, and it is easy to deal with the disposal of industrial plants emitting red mud.

Claims (1)

Red mud or red earth powder and flammable oil are mixed with single powder or mixed powder of materials such as coal, coke, anthracite, peat, charcoal, and the like as a caking agent such as pitch or bentite. A method for producing briquettes and altans with reduced harmful gases, characterized by kneading and molding.

Images