JPH08299749A - Deodorizer - Google Patents

Abstract

PURPOSE: To provide an efficient and economical deodorizer capable of controlling the deodorant to the water content just right to permeate air in the deodorizer using soil, etc., as the deodorant and adsorbing a malodorous component on the soil, etc., for deodorization. CONSTITUTION: This deodorizer consists of a deodorization vessel 1 with a gas inlet 10 formed in a closed top wall 8, perforated plates 11a and 11b to vertically divide the inside of the vessel 1 in plural stages and the beds 12a and 12b of a deodorant consisting of soil or bark formed on the perforated plates. Further, air layers 13a, 13b and 13c are formed respectively between the beds 12a and 12b, between the uppermost bed and top wall and between the lowermost bed and bottom wall, and a gas discharge passage 14 is furnished and is made to communicate with the lowermost air layer 13c. A malodorous gas introduced from the inlet 10 is passed downward through the beds 12a and 12b, hence the excess moisture is removed, the gas is deodorized, and the deodorized gas is discharged into the atmosphere through the passage 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deodorizing device for removing an offensive odor generated during the fermentation treatment of organic substances such as food waste, livestock manure, human waste and the production of compost.

[0002]

2. Description of the Related Art For example, as a means for treating food waste generated from general households, inns, hotels, and various other facilities, these food waste are supplied to a fermenter and agitated and fermented in the fermentor for a predetermined period of time. It is being composted. The gas generated when fermenting food waste in such a fermenter is accompanied by a bad odor and impairs environmental hygiene.

Therefore, in order to remove such a bad smell,
It is performed that a gas with a bad odor generated from the inside of a fermenter is guided to a deodorizing device and deodorized in the deodorizing device.
There are various types of deodorizing devices conventionally used, but as a device that can economically deodorize a large amount of gas, soil is used as a deodorant, and odor components such as ammonia (N
There is known a soil deodorizing device that deodorizes N in H ₃ ) by adsorbing it to soil.

FIG. 2 is a schematic vertical sectional view showing an example of a conventional soil deodorizing device. As shown in FIG. 2, the conventional device has a deodorizing tank 1 made of concrete, and a length of the deodorizing tank 1 which is provided at the bottom of the deodorizing tank 1 and which guides the odorous gas generated from the fermentation tank 6 into the tank. So as to support the main pipe 2 extending in the direction, a plurality of gas ejection pipes 3 having a large number of gas ejection ports 3a branched from the main pipe 2 in the width direction of the deodorizing tank 1, and the main pipe 2 and the gas ejection pipe 3. Below that, that is, on the bottom surface of the deodorizing tank 1 and above the main pipe 2 and the gas ejection pipe 3, a crushed stone layer 4 having a predetermined thickness and a black clay layer 5 having a predetermined thickness formed above the crushed stone layer 4 are formed. Has become.

The odorous gas generated from the fermentation tank 6 is guided by a blower 7 through a conduit 8 to a main pipe 2 and a gas ejection pipe 3 provided in the lower portion of the deodorization tank 1, and a gas ejection port 3a of the ejection pipe 3 is introduced. It is ejected through the crushed stone layer 4. The odorous gas ejected into the crushed stone layer 4 rises in the black soil layer 5 and is exhausted from the upper portion thereof, while the odorous components in the gas are adsorbed by the black soil layer 5. The adsorbed odor component is processed as a nutrient source for microorganisms existing in the soil.

[0006]

The above-mentioned conventional soil deodorizing device has the following problems. The odorous gas generated from the fermentation tank 6 contains a large amount of steam due to the heat generated in the fermentation process of food waste. Therefore, the black soil layer 5
The lower part of the water absorbs the water vapor in the odorous gas containing a large amount of water vapor, which is blown into the black soil layer 5 through the crushed stone layer 4, and becomes a wet state containing a large amount of water. as a result,
In the lower part of the black soil layer 5, the air permeability is deteriorated, and the habitat of microorganisms in the soil is in an anaerobic state.

In the deodorization of soil, it is necessary to control the soil to have a moisture content of about 30% with good air permeability for efficient deodorization. However, in the conventional device, as described above, the lower part of the black soil layer 5 is in a wet state containing a large amount of water, and the upper part of the deodorizing tank 1 is open, so that the soil water content is reduced due to rainfall. Is too much, and when it is fine, water evaporates and becomes too small.
The soil is not easy to manage, which necessitates soil agitation work several times a year.

Microorganisms in soil require a acclimation period of about 1 to 3 weeks until their habitat is adjusted, and the deodorizing effect cannot be expected within this acclimation period. Therefore, it is necessary for the soil to have a sufficient capacity to adsorb odor, an environment in which microorganisms live, and a backup for deodorization during acclimation of microorganisms.

Therefore, an object of the present invention is to solve the above-mentioned problems, to use soil or the like as a deodorant, and to deodorize by adsorbing an odorous component to the soil or the like, to remove soil or the like as a deodorant. Another object of the present invention is to provide a device capable of easily controlling the content of moisture with good air permeability and capable of efficiently and economically deodorizing.

[0010]

The deodorizing device of the present invention comprises:
A deodorizing tank having an upper end closed by a top wall, a gas inlet for introducing an odorous gas into the deodorizing tank provided on the top wall, and a plurality of deodorizing tanks at predetermined intervals in the vertical direction in the deodorizing tank. A horizontal perforated plate that is divided into steps, and a plurality of deodorized layers made of soil or bark formed on the perforated plates of the plurality of steps with a predetermined interval between the upper perforated plate and the top wall. , The plurality of stages of each deodorizing layer, between the uppermost stage deodorizing layer and the top wall, and between the lowermost stage deodorizing layer and the bottom wall, and the lowermost air layer The odorous gas blown into the uppermost air layer from the gas inlet provided in the upper wall, which is provided with a vertical gas discharge path protruding from the top wall, is used for the uppermost air layer. Removes excess water while passing downward through the multiple deodorizing layers from Re and deodorized, then the it has the characteristics to be dissipated from the bottom air layer into the atmosphere through said gas discharge path.

[0011]

According to the present invention, the odorous gas blown into the uppermost air layer from the gas inlet provided on the top wall passes downward from the uppermost air layer through the plural deodorizing layers. In the meantime, first, excess water in the odorous gas is removed in the uppermost deodorizing layer, and then, deodorization is performed in the second deodorizing layer, and then the air is diffused into the atmosphere. In this way, the odorous gas passes downward as a downward flow in the deodorizing layers in a plurality of stages. Therefore, excess water in the odorous gas is easily adsorbed to the soil, the anaerobic state due to an increase in water in the soil disappears, and the habitat of microorganisms is adjusted.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings. FIG. 1 is a schematic vertical sectional view showing an example of the apparatus of the present invention. As shown in the drawing, the upper end of the deodorizing tank 1 is a top wall 8
The top wall 8 is provided with a gas inlet 10 for introducing odorous gas into the deodorizing tank 1. A conduit 16 is connected to the gas inlet 10, and the odorous gas generated from the fermentation tank 6 is supplied from the gas inlet 10 into the deodorizing tank 1 through the conduit 16 by the blower 7.

In the deodorizing tank 1, a horizontal first perforated plate 11a is divided into, for example, two stages at predetermined intervals in the vertical direction.
And a second perforated plate 11b. First perforated plate 11
A first-stage deodorizing layer 12a made of soil such as black soil is provided on the a at a predetermined distance from the top wall 8, and on the second porous plate 11b, First perforated plate 11
A second stage deodorizing layer 12b made of soil such as black soil is provided at a predetermined distance from a.

Between the first-stage deodorizing layer 12a and the top wall 8, there is a first
The air layer 13a is formed, the second stage deodorizing layer 12b and the first perforated plate.
A second air layer 13b is formed between the second perforated plate 11b and the bottom wall 9, and a third air layer 13c is formed between the second perforated plate 11b and the bottom wall 9.

A third air layer 13c between the second perforated plate 11b and the bottom wall 9 is provided with a lower portion of a vertical gas discharge passage 14 whose upper portion projects from the top wall 9 and which communicate with each other. Gas exhaust
A porous plate 11c is provided in the lower part of 14 at the same horizontal position as the second porous plate 11b, and an activated carbon layer 15c is provided on the porous plate 11c.
Are formed.

The odorous gas blown into the uppermost first air layer 13a from the gas inlet 10 provided on the top wall 8 is directed downward from the first air layer 13a to the first deodorizing layer 12a. The excess water in the odorous gas is removed during the passage. In this way, the odorous gas from which excess water has been removed passes downward from the second air layer 13b to the inside of the second stage deodorizing layer 12b, and is deodorized during that time. The soil of the second stage deodorizing layer 12b is
Excess moisture is removed and almost constant level of odorous gas is passed, so the anaerobic state of soil due to increased moisture disappears,
It is maintained in a stable environment where microorganisms can easily inhabit.

The odorous gas deodorized by the second-stage deodorizing layer 12b in this manner is discharged from the third air layer 13c to the gas discharge path 14
To be released into the atmosphere.

For example, the first air layer 13a, the first stage deodorizing layer 12
a, the height of the second air layer 13b, the second stage deodorizing layer 12b, and the third air layer 13c is 500 mm, the wind speed of the odorous gas passing through these layers is 5 to 15 mm / s, and the activated carbon layer 15
The height of the air is 300 mm and the wind speed of the odorous gas passing through it is 0.
As a result of operating at 4 m / s or less, regulated odor components such as ammonia could be efficiently removed from the odor gas.

The activated carbon layer 15 is used as a backup when the microorganisms in the soil in the first-stage deodorizing layer 12a and the second-stage deodorizing layer 12b are acclimatized and the deodorizing efficiency is low,
It is provided. That is, when the deodorizing efficiency of the first-stage deodorizing layer 12a and the second-stage deodorizing layer 12b is low, the odorous gas that has passed through the first-stage deodorizing layer 12a and the second-stage deodorizing layer 12b should be passed through the activated carbon layer 15. Deodorized by.

Since the upper end of the deodorizing tank 1 is closed by the top wall 8, the soil moisture may become excessive due to rainfall,
In addition, water does not evaporate and become too small during fine weather, and therefore, it is not necessary to perform soil stirring work, and the management thereof is easy.

In the above embodiment, the first stage deodorizing layer 12a and the second stage deodorizing layer 12b formed on the first perforated plate 11a and the second perforated plate 11b are formed by soil such as black soil. There is a fermented particle size of 30 mm
It may be formed by the bark of a broad-leaved tree.

[0022]

As described above, according to the present invention,
The odorous gas blown into the deodorizing tank 1 through the gas inlet 10 provided on the top wall 8 of the deodorizing tank 1 passes downward in the first-stage deodorizing layer 12a and the second-stage deodorizing layer 12b. During that time, excess moisture in the gas is removed, and efficient deodorization can be performed. Therefore, the soil or bark as a deodorant can be easily controlled to a moisture content with good air permeability, and the deodorant can be efficiently and economically deodorized without requiring stirring work of these deodorants. There are industrially useful effects that can be achieved.

[Brief description of drawings]

FIG. 1 is a schematic vertical sectional view showing an example of an apparatus of the present invention.

FIG. 2 is a schematic vertical sectional view showing an example of a conventional soil deodorizing device.

[Explanation of symbols]

 1 Deodorizing tank 2 Main pipe 3 Gas spouting pipe 4 Crushed stone layer 5 Black clay layer 6 Fermenter 7 Blower 8 Top wall 9 Bottom wall 10 Gas inlet 11a 1st stage porous plate 11b 2nd stage porous plate 12a 1st stage deodorizing layer 12b 1st stage 2nd deodorization layer 13a 1st air layer 13b 2nd air layer 13c 3rd air layer 14 Gas discharge path 15 Activated carbon layer 16 Conduit

Claims (1)

[Claims] 1. A deodorizing tank having an upper end closed by a top wall, a gas inlet for introducing an odorous gas into the deodorizing tank provided on the top wall, and a predetermined vertical direction in the deodorizing tank. A horizontal perforated plate that is divided into a plurality of stages at intervals, and a plurality of soil or bark formed on the plurality of stages of perforated plates with a predetermined gap between the upper perforated plate and the top wall. A deodorizing layer of a step, each of the deodorizing layers of the plurality of steps, an air layer formed between the uppermost deodorizing layer and the top wall, and between the lowermost deodorizing layer and the bottom wall, and the bottom air An upper part of the odorous gas blown into the uppermost air layer from a gas inlet provided in the top wall, which is provided so as to communicate with the layer, and whose upper part is a vertical gas discharge path protruding from the top wall. While passing downward in the deodorizing layers of the plurality of stages from the uppermost air layer, Is in retained water is removed and deodorizing, the deodorizing apparatus characterized by being adapted to be dissipated to the atmosphere through the gas discharge passage from the bottom air layer.