JP3202564B2 - Deodorizing device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a deodorizing apparatus, and more particularly to a deodorizing apparatus for effectively removing not only ammonia as a basic odor component but also hydrogen sulfide as an acidic odor component.

[0002]

2. Description of the Related Art Conventionally, as a method for deodorizing odorous gas using humus, for example, a technique described in Japanese Patent Application Laid-Open No. 2-290224 is known. The publication discloses a method of dehumidifying an organic substance in a liquid containing the organic substance by using a humic acid accelerating agent such as humic acid or fulvic acid, and contacting the liquid with an odor gas to deodorize the liquid. I have.

However, this conventional method shows a result of 100% removal of ammonia as a basic odor component, but has a problem that hydrogen sulfide as an acidic odor component is not completely removed. There is a point. Since even small amounts of hydrogen sulfide have a toxic and rotten egg-like odor, it is desired that they be completely removed.

[0004]

Accordingly, an object of the present invention is to provide a deodorizing apparatus for effectively removing hydrogen sulfide, which is an acidic odor component, which cannot be completely removed by the conventional method.

[0005]

[0006]

In order to achieve the object of the present onset to solve the above problems
The deodorizing apparatus according to the present invention is a solidification filtration system in which at least one filler positioned above a plurality of fillers provided in a deodorization tower main body is impregnated with a humus eluate into a pumice powder having a leachable silica component. At least one filler positioned below is selected from solidified filter media impregnated with a humus-based soil compact or a humus eluate in a pumice powder containing an eluting silica component. It is characterized by at least one kind. The filler used in the present invention includes:
It is also preferred to contain powdered or granular activated carbon.

In a preferred aspect of the present invention, a liquid reservoir for the filler is provided around at least one lower stage of the filler.

In another preferred embodiment, a reaction tank is provided inside which is filled with at least one kind of soil powder, granules or compacts mainly composed of humus, or pumice containing an eluting silica component. After introducing the liquid in the circulation tank and reacting for a predetermined time, the liquid is returned to the circulation tank.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION A soil compact mainly composed of humus used in the present invention is a pellet formed by mixing humus soil, if necessary, other inorganic materials (eg, magnesium), a binder or an elution-controlling agent, and the like. The shape of the pellet may be any of a cylinder, a prism, a disk, and the like. As the humus, spores of useful microorganisms or those in which a large number of useful microorganisms inhabit are preferably used, and it is more preferable that the humus contains an elutable silica component. As the pumice containing an eluting silica component, a clay mineral or a volcanic rock containing a silica component that can be eluted into water is used.

[0010] Further, the solidified filter medium is formed by granulating pumice fine powder containing an eluting silica component, impregnating with a low-molecular colloid eluate extracted from a soil compact mainly composed of humus, and drying. It can be made by repeating several times.

The filler used in the present invention can contain activated carbon. In the present invention, a filler is prepared by mixing pumice containing an eluting silica component and granular activated carbon, or a powder or granular activated carbon is mixed in a soil compact mainly composed of humus, and pelletized. It can be used or granulated by mixing powdered or granular activated carbon into a solidified filter medium.

In the present invention, the packing material is provided in multiple stages in the deodorization tower main body, but the number of stages is preferably two from the viewpoint of production cost and processing efficiency. When pumice is used in the upper stage, a soil compact mainly composed of humus or a solidified filter material can be used in the lower stage. By contacting the odorous gas with the soil compact mainly composed of humus before contacting the odorous gas with pumice in the tower, it is effective in removing acidic odorous components such as hydrogen sulfide in addition to basic odorous components such as ammonia. Because it demonstrates.

When a solidified filter material is used in the upper stage, a soil compact mainly composed of humus can be used in the lower stage.

In the present invention, the above-mentioned soil compact mainly composed of humus and a solidified filter material can be used as a mixture.

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a schematic longitudinal sectional view showing one embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a deodorization tower main body,
Any of a square tube and the like may be used.
An odor gas inlet 2 is provided, and a treated gas outlet 3 is provided above (including the upper side). 4
Is a filler in the upper stage, and the filler 4 such as pumice or solidified filter material is filled on the support plate 5. Fill height is 1
It is preferably about 0 to 50 mm. The support plate 5 can be made of a mesh or punched metal.

Reference numeral 6 denotes a lower filler, which is filled with a filler 6 such as a soil forming body mainly composed of humus on a support plate 7. The support plate 7 can use a net-like body or a punched metal. When a filler having a high elution property is used as the upper and lower fillers 4 and 6, the support plate 5 in FIG.
It is also preferable to adopt a structure as shown in FIG.

[0017] In FIG 2, 70 is a liquid reservoir, the filler 6 is filled in the liquid reservoir portion 70. Reference numeral 71 denotes a plurality of risers through which the odor gas passes, and the riser 71 is provided with a bubble bell 72. The bubble bell 72 has a structure in which the upper portion is sealed, and the odor gas that has entered from below is discharged from the side through-hole 73 and is introduced into the liquid reservoir 70. 7
2 is <br/> the riser 71 even lid provided with a gap 74, odors entering the riser 71 has a structure into the liquid reservoir portion 70 from the gap 74. Reference numeral 75 denotes a downcomer, through which the liquid flowing out of the liquid reservoir 70 is sent downward.

Reference numeral 8 denotes a water spraying section provided above the upper filler 4, and reference numeral 9 denotes a water spraying section provided above the lower filler 6, and a plurality of spray nozzles 81 and 91 are provided respectively. Reference numeral 10 denotes a circulation tank provided at a lower portion of the deodorization tower main body 1, and circulating liquid in the tank is sent to the water sprinkling units 8 and 9 via a pump 11. Reference numeral 12 denotes a reaction tank provided as needed, and a pumice containing an eluting silica component therein, a filling section 13 filled with a soil former mainly composed of humus.
The circulating liquid is sent to a reaction tank 12 via a pump 15 to decompose and assimilate odor components.

In the present invention, the above-mentioned reaction tank 12 is not always necessary, since the odor component is transferred to the liquid side by gas-liquid contact, and then decomposition and assimilation proceed considerably in the circulation system.
When the load of the odor gas is high, the provision of the reaction tank 12 enables efficient long-term operation.

In order to promote the decomposition and assimilation of odorous components, a soil compact mainly composed of pumice or humus having an eluting silica component is filled in a circulation tank 10 in a basket of wire mesh. It is also preferable to keep it immersed.

[0021]

An embodiment of the present invention will be described below.

Example 1 An experiment was conducted using the deodorizing apparatus shown in FIG. 1 under the following conditions. As the filler, a pumice containing an eluting silica component was used as the filler 4 in the upper stage, and a soil compact (4 mmφ × 10 mmL pellet) mainly composed of humus was used as the filler 6 in the lower stage. Further, nets were used as the support plates 5 and 7. Other experimental conditions are as shown in Table 1.

[0023]

[Table 1]

The amount of odorous gas shown in Table 1 was introduced from the inlet 2, and the inside of the tower body 1 was brought into contact with the circulating liquid in an upward flow, and the treated gas was discharged from the outlet 3.

The odor gas is determined by measuring the concentrations of ammonia (basic odor component) and hydrogen sulfide (acid odor component) at the odor gas inlet 2 and the treated gas outlet 3 according to JIS.
It was measured by the method. Table 2 shows the results.

Example 2 An experiment was conducted in the same manner as in Example 1, except that the upper filler 4 was replaced with a solidified filter medium and the lower filler 6 was replaced with a solidified filter medium (particle diameter: 5 mmφ). . Table 2 shows the results.

Comparative Example 1 An experiment was conducted in the same manner as in Example 1 except that pumice was not used and both the upper and lower fillers 4 and 6 were replaced with soil compacts mainly composed of humus. Table 2 shows the results.

[0028]

[Table 2]

Example 3 In Examples 1 and 2 and Comparative Example 1, the state of removal of hydrogen sulfide with respect to the elapsed days was examined, and the results are shown in FIG. FIG.
, Line A indicates Example 1, line B indicates Example 2, and line C indicates Comparative Example 1.

As is apparent from FIG.
Showed a 100% removal rate 10 days after the start of the experiment, but in Comparative Example 1, the maximum removal rate was 98% even after 15 days. Fifteen
After the day, the removal rate of hydrogen sulfide gradually decreased.

[0031]

According to the present invention, hydrogen sulfide which is an acidic odor component, which cannot be completely removed by the conventional method, can be effectively removed. Further, according to the present invention, an organic odor component can also be effectively removed.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing one embodiment of the present invention.

FIG. 2 is a sectional view of a main part showing another embodiment of the present invention.

FIG. 3 is a graph showing the removal rate of hydrogen sulfide with respect to the number of elapsed days in an example of the present invention.

[Explanation of symbols]

 1: Deodorization tower 2: Inlet 3: Outlet 4, 6: Filling material 5, 7: Support plate 8, 9: Water sprinkling unit 10: Circulation tank 11, 15: Pump 12: Reaction tank 13: Filling unit 14: Sprinkling Gas part 70: Liquid pool part 71: Up pipe 72: Bubble bell 73: Through hole 74: Gap 75: Down pipe 81, 91: Spray nozzle

Continuation of front page (58) Field surveyed (Int. Cl. ⁷ , DB name) B01D 53/34-53/88

Claims (3)

(57) [Claims] 1. A deodorization tower body having an odor gas introduction port below and a treated gas discharge port above is provided in multiple stages in a deodorization tower main body, and a circulation tank is provided at a lower portion of the deodorization tower main body. In a deodorizer having a sprinkling section of a circulating liquid supplied from a circulation tank above each of the fillers, at least one of the fillers located above has a pumice powder containing a silica component that elutes a humus eluate. A deodorizing device, characterized in that the solidified filter material impregnated with at least one of the below-mentioned fillers is at least one selected from the following (1) and (2). (1) Soil compacts mainly composed of humus (2) Solidified filter media in which the eluate of humus is impregnated with pumice powder containing an eluting silica component 2. The deodorizing apparatus according to claim 1, further comprising a reservoir for an eluate of the filler around at least one stage of the filler located below. 3. A reaction tank filled with at least one kind of soil powder, granules or compacts mainly composed of humus, or pumice containing an eluting silica component, is provided therein. 3. The deodorizing apparatus according to claim 1 , wherein the liquid is returned to the circulation tank after reacting for a predetermined time after introducing the liquid.