JP2826090B2 - Gas purification equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a gas purifier.

[0002]

2. Description of the Related Art In recent years, the problem of air pollution caused by nitrogen oxides (NOx) generated from factory exhaust gas or automobile exhaust gas has become serious, and in addition to direct adverse effects on the human body such as respiratory disorders, etc. When nitric acid is chemically changed in the atmosphere into nitric acid and dissolved in rain to form acid rain, environmental destruction such as death of forest trees and death of aquatic organisms in lakes and marshes is caused.

[0003] For this reason, regulations on exhaust gas are becoming stricter, and measures against exhaust gas in each company are extremely important issues.

As a conventional measure against exhaust gas, it has been generally practiced to dispose a honeycomb-structured denitration catalyst in an exhaust gas duct to remove nitrogen oxides contained in the exhaust gas.

[0005]

However, processing the denitration catalyst to have a honeycomb structure requires a great deal of time and labor, so that there is a disadvantage that the production cost of the denitration catalyst is high. If the quality deteriorates and deteriorates, the performance of removing nitrogen oxides is greatly reduced. Therefore, there is a disadvantage that the denitration catalyst must be replaced relatively frequently.

[0006] The present invention has been made in view of the above-mentioned circumstances, and it is possible to significantly reduce the manufacturing cost as compared with the related art, and furthermore, it is possible to maintain a high nitrogen oxide removal performance for a long period of time. It is intended to provide a device.

[0007]

SUMMARY OF THE INVENTION The present invention provides a method for producing a plurality of bacterial cultures by adding at least one of a water-soluble resin and starch paste to soil obtained by mixing humus soil with masago soil and culturing denitrifying bacteria. The present invention relates to a gas purification device, wherein a body is molded and the bacterial culture granules are filled in a cylindrical body to form a gas purification layer.

Therefore, according to the present invention, when a contaminant gas containing nitrogen oxides is introduced from one end of the cylindrical body, the contaminant gas passes through gaps between the bacterial culture particles in the gas purification layer and the bacterial culture particles themselves. To the other end of the cylindrical body, but during this passage, the nitrogen oxides contained in the contaminated gas are harmless due to the reducing action of the denitrifying bacteria cultured in the respective bacterial culture granules. Therefore, a purified gas in which harmful nitrogen oxides have been significantly reduced is discharged to the other end of the cylindrical body.

[0009]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 and FIG. 2 show an embodiment of the present invention. In FIG. 1, a mulch is mixed with masago (granite) and a denitrifying bacterium, which is a soil microorganism, is cultivated. A plurality of bacterial culture granules formed into a sphere by adding a water-soluble resin such as alcohol are shown. The bacterial culture granules 1 are filled in a large number in a cylindrical body 2 to constitute a gas purification layer 3. ,
Both end surfaces of the tubular body 2 are closed by filters 4 and 4 which can be ventilated.

Here, the microbial culture granules 1 are formed into a viscous state by adding appropriate water to a water-soluble resin and kneaded into soil, and are formed into a spherical shape before the water-soluble resin is dried and solidified. In this case, each of the bacterial culture granules 1 is controlled so that the density distribution of the bacterial culture granules 1 in the gas purification layer 3 becomes uniform.
It is preferable to make the particle diameters uniform.

Incidentally, this kind of water-soluble resin is air-permeable even when dried and solidified, and does not inhibit the biological activity of denitrifying bacteria.
The denitrifying bacteria continue to be cultivated in the bacterial culture granules 1.

In addition, starch paste may be used in place of the water-soluble resin. Even when the starch paste is used, the air permeability is not impaired when dried and solidified, and the biological activity of denitrifying bacteria is inhibited. do not do.

Further, the reason why the mulch is mixed with the masago is to reduce the density of the fungal culture granules 1 per se to a level that does not hinder the cultivation, and to ensure sufficient air permeability.

Thus, for example, the cylindrical body 2 filled with the bacterial culture particles 1 is inserted and arranged in a smoke exhaust duct 6 through which a pollutant gas 5 containing nitrogen oxide flows, and one end of the cylindrical body 2 When the contaminated gas 5 is introduced from the side, the contaminated gas 5 passes through the gap between the bacterial culture granules 1 in the gas purification layer 3 and the bacterial culture granule 1 itself and reaches the other end of the cylindrical body 2. You.

At the time of this passage, the nitrogen oxides contained in the contaminated gas 5 are converted into harmless nitrogen gas by the reducing action of the denitrifying bacteria cultivated in each cell culture granule 1. To the other end of the tubular body 2, the purified gas 5 'in which harmful nitrogen oxides have been significantly reduced is discharged.

When the contaminated gas 5 is allowed to pass, it is preferable to adjust the temperature of the contaminated gas 5 upstream so as to be in a temperature range in which the reducing action of the denitrifying bacteria is most active. It is preferable to appropriately supply water to the gas purification layer 3 so that the culture granules 1 do not remarkably dry and the denitrifying bacteria do not die.

Therefore, according to the above-described embodiment, since it can be manufactured by a simple process using inexpensive materials, the manufacturing cost can be greatly reduced as compared with the prior art, and the biological reduction action by denitrifying bacteria can be achieved. Since nitrogen oxides are converted into harmless nitrogen gas by the method, there is no deterioration due to chemical surface deterioration as in the case of using a denitration catalyst, and high removal performance for nitrogen oxides can be maintained for a long period of time. .

The gas purifying apparatus of the present invention is not limited to the above embodiment, but may include both a water-soluble resin and a starch paste, and the bacterial culture particles are not limited to a spherical shape. Of course, various changes can be made without departing from the spirit of the present invention.

[0020]

According to the above-described gas purifying apparatus of the present invention, it is possible to manufacture the gas purifying apparatus using inexpensive materials by simple processing. Nitrogen oxides are converted into harmless nitrogen gas by a biological reduction action, so there is no deterioration due to chemical surface deterioration as in the case of using a denitration catalyst. An excellent effect of being able to be maintained throughout can be exerted.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating an example of an embodiment of the present invention.

FIG. 2 is a view in the direction of arrows II-II in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Bacterial culture granule 2 Cylindrical body 3 Gas purification layer

Claims (1)

(57) [Claims] 1. A method in which at least one of a water-soluble resin and a starch paste is added to soil obtained by mixing humus soil with masago and cultivating denitrifying bacteria to form a plurality of bacterial culture granules. A gas purifying apparatus, wherein a granular material is filled in a cylindrical body to constitute a gas purifying layer.