JP2002001056A - Method and apparatus for extinguishing offensive odor by organic substance - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method which is excellent in deodorization effects and can extinguish offensive odors when they are discharged into the air, and an apparatus for materializing the method. SOLUTION: (1) An odorous gas is contacted with a filler and washed in a showering column (contacting column), (2) the gas washed in the showering column is sent to a heating chamber to be heated, (3) the dry gas heated in the heating chamber is sent to an exhaust cylinder, contacted with a thermal catalyst set in the cylinder to be deodorized further, and discharged into the air.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for eliminating odors such as waste odors and decomposition odors caused by organic substances, and an apparatus for implementing the method.

[0002]

2. Description of the Related Art Conventionally, there has been known a method in which an odorous gas or the like is brought into contact with a shower jetted from above a contact tower in a countercurrent state to wash and eliminate odor while ascending inside the contact tower. There is also a technique in which an odorous gas is heated at the lower part of an exhaust tower, and the heated odorous gas is passed through a thermal catalyst to heat and eliminate the odor during the exhaust.

[0003] However, the above-mentioned method using a contact tower or a method using a thermal catalyst is performed alone, and although the deodorizing effect is recognized as such, the deodorizing effect when discharged into the atmosphere is still unsatisfactory. There was something.

[0004]

SUMMARY OF THE INVENTION The present invention is based on such a prior art, and a method and an apparatus for realizing a method for eliminating odors having a better deodorizing effect when discharged into the atmosphere. The purpose is to provide.

[0005]

The deodorizing method of the present invention is as follows. (1) The odorous gas is washed by contacting it with the packing in a showering tower (contact tower), and (2) the odorous gas is washed in the showering tower. The gas is sent to the heating chamber to be heated, and (3) the dried gas heated in the heating chamber is sent to the exhaust pipe, contacted with the thermal catalyst provided in the exhaust pipe, further deodorized, and then discharged to the atmosphere. I did it. The apparatus for performing the above method includes a showering tower 5, a heating chamber 15 connected to the showering tower 5 by a conduit 14, and an exhaust pipe 17 having a heat catalyst 18 erected above the heating chamber 15. The showering tower 5 is provided with a contact material 6 inside, a water tank 8 at a lower part, and a reusable shower device 7 connected to the water tank at an upper part. An electric heating coil for heating is provided inside, and the heat catalyst 18 is provided with a tube heater 19.
Made of a metal honeycomb catalyst heated by

[0006]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. The deodorizing method of the present invention can be summarized as follows: 1) a step of washing odorous gas in a showering tower (contact tower); 2) a step of heating the gas washed in the showering tower; Contacting the odor gas with the thermal catalyst in the exhaust pipe to further deodorize the odor gas.

In FIG. 1, for example, odorous gas [odor intensity 4 (strong odor) to 5 (strong odor), pleasant / unpleasant degree-2 (unpleasant) to -3 (very unpleasant)] is supplied from the intake port 1. It is sucked into the apparatus by a fan 3 and the like provided in the suction pipe 2. The odorous gas sucked by the fan 3 is sent from the lower part of the showering tower 5 through the filter 4 (used as needed) on the way. The showering tower 5 is filled with a contact material 6 and deodorizes most of the odor while being in contact with water jetted from the shower device 7 above.

The water jetted from the shower device 7 is circulated through a pump 9 and a pipe 10 in a water tank 8 provided below the showering tower 5 for use. 11 is a sprinkler plate, and FIG.
As shown in the figure, water spouted from the shower device 7 has a large number of small holes 12 and is widely dispersed through the sprinkling plate 11 so as to be in good contact with the contact material in the showering tower. Reference numeral 13 denotes a water supply pipe, whereby a water tank 8 is provided.
Use fresh water inside. 20 is a drain pipe. In FIG. 4, reference numeral 11a denotes a degassing pipe, and gas rising from below through the showering tower is sent to the conduit 14 through the pipe 11a.

The gas that has been washed and deodorized by passing through the showering tower 5 is guided to the conduit 14 from the upper part of the showering tower 5, and is supplied to the heating chamber 1 provided at the lower part of the exhaust pipe 17.
5 is led. An electric heating coil 16 is provided in the heating chamber 15, whereby the gas containing moisture sent from the showering tower 5 is heated to about 200 to 250 ° C. and dried.

The gas dried in the heating chamber 15 passes through a thermal catalyst 18 provided below the exhaust pipe 17 and is further deodorized and discharged upward. Reference numeral 19 denotes a tube heater provided on the outer periphery of the thermal catalyst layer, whereby the thermal catalyst 18 is heated.

The thermal catalyst is a metal honeycomb catalyst, as shown in FIG. 5, in which a highly active catalyst is supported on a stainless steel honeycomb (honeycomb) base, and a high purification and purification for bad smell and organic substances are performed.
It demonstrates deodorizing ability.

In addition, a ceramic honeycomb or the like may be used instead of the metal honeycomb catalyst. The features of the metal honeycomb catalyst are as follows: 1) a metal case can be directly filled; 2) no breakage compared to a ceramic honeycomb; Easy handling, 3) Less pressure loss than ceramic honeycomb, 4) Good thermal conductivity, short heating time by heater to predetermined temperature, 5) Easy formation into desired shape or cell shape, etc. It has the following characteristics.

FIG. 5 is a diagram showing the structure of the metal honeycomb catalyst. This catalyst has the properties shown in FIG.
It is effective for purification and deodorization of ethyl acetate, acetaldehyde, carbon monoxide and the like.

With the above structure, the gas containing the bad odor (the waste odor or the decomposed odor) due to the organic matter sent from the intake port 1 flows from the top while the contact material 6 rises in the showering tower 5. It comes in contact with water flowing downward and is largely deodorized.

Further, the gas heated and dried in the heating chamber 15 is completely deodorized and discharged while passing through the metal honeycomb catalyst 18.

[0016]

According to the first aspect, the odorous gas is firstly deodorized by wet deodorization in a showering tower and then dried,
By continuously performing dry deodorization with a thermal catalyst, it is possible to effectively deodorize odorous gas having an odor intensity of 4 to 5 and a degree of unpleasantness of 2 to -3. Can be deodorized and discharged into the atmosphere in an odorless state.

According to a second aspect of the present invention, the devices are already known.
Although having a relatively simple configuration, it has become possible to provide an extremely effective and cost-effective deodorizing device.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a device for eliminating an odor caused by an organic substance according to the present invention.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a top view of FIG. 1;

FIG. 4 is a detailed view of a portion viewed from an arrow X in FIG. 2;

FIG. 5 is a perspective view and a partially enlarged view of a metal honeycomb thermal catalyst.

FIG. 6 is a list of various properties of a metal honeycomb catalyst.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Intake port 2 Suction pipe 3 Fan 4 Filter 5 Shower tower 6 Contact material 7 Shower device 8 Water tank 9 Pump 10 Piping 11 Sprinkler plate 11a Degassing pipe 12 Small hole 13 Water supply pipe 14 Conduit 15 Heating room 16 Electric heating coil 17 Discharge Cylinder 18 Thermal catalyst 19 Tube heater 20 Exhaust tube

Continued on the front page F-term (reference) 4C080 AA07 BB02 CC02 HH05 JJ03 KK08 LL10 MM07 QQ14 QQ17 4D002 AA08 AA32 AA33 AA40 AB02 BA02 BA05 BA12 BA14 CA01 CA07 CA11 CA13 DA35 EA02 GA03 GB03 4D048 AA39 CC02 DA03

Claims (2)

[Claims] 1. The odorous gas is washed by contacting the gas with a packing in a showering tower (contact tower), 2) the gas washed in the showering tower is sent to a heating chamber and heated, and 3) the heating is performed. A method for eliminating malodors caused by organic substances, wherein a gas heated and dried in a chamber is sent to an exhaust pipe, contacted with a thermal catalyst provided in the exhaust pipe, further deodorized, and then discharged into the atmosphere. 2. A showering tower (5), and a heating chamber (1) connected to the showering tower (5) by a conduit (14).
5) and a thermal catalyst (1) set up on the upper part of the heating chamber (15).
The showering tower (5) is filled with a contact material (6), and has a water tank (8) at a lower part and a water tank at an upper part. The heating chamber (15) is provided with an electric heating coil for heating inside, and the heat catalyst (18) is made of a metal honeycomb catalyst heated by a tube heater (19). A device for eliminating odors caused by organic substances.