JPH07214031A - Reprocessing method of powdery industrial waste - Google Patents

Abstract

PURPOSE:To simply and inexpensively reprocess without making working environment worse by mixing and stirring a liquid hydrocarbon based compound with a powdery industrial waste to mix and stick the powder to each other and to suppress the scattering of the powder in reprocessing the powdery industrial waste. CONSTITUTION:In reprocessing the powdery industrial waste such as a fly ash generated in an electric power plant, the liquid hydrocarbon based compound is mixed and stirred with the powdery industrial waste. In this case, as the hydrocarbon based compound, a fuel oil such as gasoline, an engine oil, a lubricating oil or the like is used. As a result, the powder in the powdery industrial waste is mixed and stuck to each other and the scattering of the powder is prevented. Then, in reprocessing the powdery industrial waste, working environment is improved, landfill or the like is easily executed and the cost is reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for reprocessing powdery industrial waste.

[0002]

2. Description of the Related Art Powdery industrial waste is fly ash generated at a power plant, stone powder generated when shaving stones at a quarry,
Others, such as these, are usually discarded and are in powder form. In the present invention, it means what is industrially discharged, and it does not matter whether it is reused or discarded.

Fly ash refers to fine ash particles in flue gas, and in a narrow sense, fine ash particles collected from a pulverized coal combustion boiler with a collector. This has to be discarded except for being mixed with cement and used.

Stone powder, which is also normally discarded, may be used as various fillers and extenders.

[0005]

However, such powder is very difficult to handle, and it is impossible to prevent the powder from scattering during opening and mixing. Of course, the same is true even when buried and discarded as it is, and it is difficult to prevent scattering. Such dust scattering pollutes the surrounding environment and causes various problems. For example, the human body may be affected by being sucked, the laundry may adhere to the laundry, or the room may be polluted by entering the room. In some cases, it cannot be removed, causing great damage.

As a method for preventing these, solidification, or dissolution or suspension in water or another solvent can be considered, but both of them are costly and cannot be practically used.

[0007]

[Means for Solving the Problems] In view of such a current situation,
The present inventor has completed the reprocessing method of the present invention as a result of earnest research, and is characterized in that a liquid hydrocarbon compound is stirred and mixed with powdery industrial waste.

The present invention was started by finding that powder without moisture can easily be scattered, but powder that is slightly damp does not scatter. It is not suitable for the treatment of industrial waste simply by evaporation with water. It was developed from that. Therefore,
The present inventor has been able to successfully mix and attach to powdered industrial waste,
As a result of various researches on powders that condense each other with a certain amount of force, have a small amount of evaporation, do not have a bad odor, and have no toxicity, they have found that the above-mentioned hydrocarbon compounds are optimal.

Here, the hydrocarbon compounds are fuel oils such as gasoline, kerosene, turbine fuel oil, light oil, and heavy oil, engine oils of gasoline engines and diesel engines, compressor oils, machine oils, turbine oils,
Lubricating oils such as cylinder oils, cutting oils, press oils, rolling oils, and various commercially available fuels and oil-related products. Some of these are mixed with additives, some of them have atoms other than hydrogen and carbon, and some of them cannot be said to be pure hydrocarbons, but they do not have to be hydrocarbons in such a strict sense. Further, these waste oils, base oils (raw oils) for producing them, or the like, or regenerated oils from waste oils may be used. Further, those having a high boiling point, a high flash point and a low viscosity are suitable. This is because if the flash point is high (such as 200 ° C. or higher), the risk is small, and if the boiling point is high, the liquid is less likely to be lost by evaporation. Further, it is desirable that the cost is low. From this point of view, turbine oil and petroleum fractions before refining to turbine oil are also suitable.

The hydrocarbon compound of the present invention does not have to be a pure substance, and may be a mixture of plural kinds of liquids or a mixture of other components.

Although the amount of the hydrocarbon compound mixed is a problem, the present inventor has conducted various experiments to find that mixing 0.1 to 20% by weight of industrial waste such as fly ash is effective. Results found. This value of 0.1 to 20% depends on the type of liquid, but if it is mixed at 20% or more in general, the powder itself becomes like mud and it is difficult to use. Less effective.

The powder and the hydrocarbon compound can be mixed by any method in principle, such as spraying a liquid into the powder stirred with a blower or passing the powder through a portion where the liquid is sprayed. Good. There is also a method of mixing the generated waste at a place or a factory where the industrial waste is generated, before the storage in a tank or a warehouse. This is most efficient and allows all subsequent steps to take advantage of the present invention.

The method of the present invention is a method for pretreatment of industrial waste, and what kind of treatment and handling it undergoes thereafter is irrelevant to the present invention. That is, it may be discarded or burned as it is, or may be used as a material.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in more detail based on the embodiments shown in the drawings. As an example of industrial waste, a very common fly ash was used, and various hydrocarbon compounds such as lubricating oil were added to it, and experiments were conducted on the scattering of powder and the ease of handling. That is, for powdery treatment,
This is because these two properties are important.

The components of the experimental methods and examples are shown below. In addition, in the comparative example, lubricating oil or the like was not added at all (the addition amount was 0). The results are shown in Table 1,
It shows in Table 2.

Experimental Method As a method for mixing the powder and the liquid, atomized liquid was sprayed during the transfer of the powder. Scatterability of powder: The powder was dropped from the upper part to a lower container, and air was blown from the side with a blower to visually check the degree of scattering. Ease of handling: Bagging and ease of pumping were tested.

Example 1 Liquid: A heavy oil mixing ratio (% by weight): 0.1, 0.5, 5, 10, 20% Example 2 Liquid: turbine oil mixing ratio (% by weight): 0.1, 0.5, 5, 10, 20 % Example 3 Liquid: Machine oil mixing ratio (wt%): 0.1, 0.5, 5, 10, 20% Example 4 Liquid: Base oil mixing ratio (wt%): 0.1, 0.5, 5, 10, 20% Example 5 Liquid: Engine oil mixing ratio for gasoline engine (wt%): 0.1, 0.5, 5, 10, 20% Example 6 Liquid: Waste oil mixing ratio (wt%): 0.1, 0.5, 5, 10, 20%

Table 1 shows the results of the scattering test of the above embodiment. ○ indicates that it was scattered and dropped downward, △
Indicates a slight scattering, and x indicates a large scattering.

[Table 1]

From this table, it is understood that the scattering property becomes lower (good) as the mixing amount increases. Almost no scattering occurs when 5% or more is mixed. This is a surprising difference with the naked eye as compared with the conventional unmixed one.

Table 2 shows the result of ease of handling.
Is easier than normal powder, △ is about the same as normal powder, ×
Is usually less than or equal to In the case of the pressure-feeding property, it is easy to carry it together with the pressure-feeding air, and in the case of the bag-packing property, it is the ease of introduction into the bag with a scoop or a conveyor. Here, the one of Example 1 was used.

[Table 2] From these results, it can be seen that even if lubricating oil or the like is added, there is almost no change in the pressure-feeding property, and the bag-packing property does not scatter and is easy.

From the results shown in Tables 1 and 2, in order to satisfy the basic requirements of cement and to eliminate the drawbacks of the conventional powder, the mixing amount of lubricating oil and the like is 0.1 to 20%. It turns out that is good.

[0022]

As described in detail above, the method for treating industrial waste according to the present invention has the following great advantages. In the case of reprocessing, the powder does not scatter, so that it can be easily mixed with other materials and does not deteriorate the working environment. Also, the mixing efficiency is good. Even if it is simply discarded such as landfill, it is very easy. Since it can be applied to any powder, it is not necessary to consider the type. There is almost no cost, and it will be a large cost reduction compared to the cost for environmental measures.

Claims (1)

[Claims] 1. A method for reprocessing powdery industrial waste, which comprises mixing liquid hydrocarbon compounds with powdery industrial waste with stirring.