JP2005007369A - Deodorization apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a simple and space-saving deodorization apparatus which carries out a deodorization treatment of an odor gas with oxidative decomposition action of a microorganism and discharges the gas as a purified gas after removing moisture given in the deodorization process. <P>SOLUTION: This deodorization apparatus 1 is provided with a gas inlet 11 to suck in the odor gas G, a deodorization tower 20 communicating with the gas inlet to enable the passage of the odor gas G, and a gas outlet 12 to discharge the purified gas G' which is deodorized and dehumidified by passing through the deodorization tower 20. Furthermore, the deodorization apparatus 1 is provided with a water reservoir tank 21 to store circulation water containing a carrier in which aerobic bacteria are anchored, a sprinkler 22 to sprinkle the circulation water, a pump 23 to feed the circulation water, drip layers 24 consisting of two or more roughly N-shaped metal sheets arranged apart at a predetermined spacing in the longitudinal direction, an aeration layer 25 filled with stainless steel fibers, and fan equipment 26 to make the purified gas discharged from the deodorization tower, while the water tank has a heating device 21a and an oxygen feeding device 21b. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a deodorizing apparatus using microorganisms, and more particularly to an apparatus for biologically decomposing and deodorizing odorous components of odorous gas by the action of aerobic microorganisms.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, a deodorizing apparatus using a deodorizing carrier containing microorganisms (aerobic microorganisms) is known as an apparatus for removing odorous components in odorous gas generated in sewage treatment plants and other various factories.
[0003]
A deodorizing apparatus using microorganisms deodorizes odorous gas by oxidizing and decomposing odorous components in the odorous gas with microorganisms. In order to sufficiently oxidize the odor component by such a deodorizing apparatus using microorganisms, it is necessary to supply the microorganisms with appropriate amounts of oxygen and moisture to ensure the activity of the microorganisms. For this reason, in general, the deodorization apparatus is provided with a watering device for supplying oxygen and moisture to the microorganism, and can always maintain a state suitable for the microorganism and promote oxidative decomposition of the microorganism.
[0004]
As such a deodorizing device, for example, a deodorizing tank that deodorizes the inhaled odor gas by oxidative decomposition action of microorganisms and discharges it as a purified gas, and a circulation pump that is driven to sprinkle water in the deodorizing tank. In addition, there is known a system comprising a NaOH storage tank of caustic soda for adjusting the pH of water for watering (see, for example, FIG. 3 of Patent Document 1). A carrier packed bed (microorganism growth bed) is provided at a substantially central portion in the vertical direction in the deodorization tank. The carrier packed layer is filled with a filler made of a number of carriers to which microorganisms that decompose odor components are attached in advance. Further, a water spray pipe is disposed above the carrier packed bed, and the stored water stored in a water tank formed at the bottom of the deodorizing layer is supplied by a circulation pump. The stored water is makeup water for the aquarium. Therefore, in this deodorization apparatus, when odor gas is sucked into the deodorization tank from the introduction port, it flows through the carrier packed layer from the lower side to the upper side, but is carried on the carrier while passing through the carrier packed layer. The odorous substance is decomposed in contact with microorganisms, and the purified gas flowing out from the discharge port is released into the atmosphere through the fan device after the moisture in the gas is removed by the mist separator.
[0005]
[Patent Document 1]
JP-A-7-284659 (FIG. 3)
[0006]
[Problems to be solved by the invention]
By the way, in the deodorizing apparatus as described above, the gas after passing through the watering pipe (watering apparatus) contains a lot of moisture. When the gas containing a large amount of moisture passes through the fan device, the temperature of the gas is reduced and condensation occurs on the fan device, thereby increasing the load on the fan device. For this reason, the deodorizing tank is often provided with a mist separator or the like for removing moisture present in the gas supplied with moisture during the deodorizing treatment.
[0007]
However, by providing a mist separator separately from the deodorization tank, moisture in the gas can be removed well, but the deodorization device is inevitably large in size and requires a large installation space, which may increase the equipment cost. It is not preferable.
[0008]
The present invention has been made in view of such problems. The odor gas is subjected to a deodorizing process by the oxidative decomposition action of microorganisms, and the water given in the deodorizing process is removed and discharged as a purified gas. An object of the present invention is to provide a deodorizing device having a simple structure with a small space.
[0009]
[Means for Solving the Problems]
In order to achieve such an object, the present invention provides an intake port that sucks odor gas, a deodorization tower that is communicated with the intake port and is formed so that odor gas can pass through, and a deodorization and dehumidification treatment that passes through the deodorization tower. In the deodorizing apparatus having an exhaust port for discharging the purified gas, the circulating water containing the carrier, which is provided at the bottom of the deodorizing tower and on which microorganisms (for example, aerobic microorganisms in this embodiment) are fixed, is stored. A water storage tank, a watering device provided above the water storage tank, for spraying the circulating water in the form of water droplets or mist toward the water storage tank, a pump for supplying the circulating water from the water storage tank to the watering device, and watering A dripping layer provided above the apparatus and provided with a plurality of substantially N-shaped metal plates stacked in the left-right direction at predetermined intervals, and provided above the dropping layer and filled with a stainless steel fibrous body. Aeration layer and above the aeration layer And a fan device that sucks odorous gas from the intake port, passes the inside of the deodorizing tower from below to above and discharges it from the exhaust port to the outside of the deodorizing tower, and the water tank heats and holds the circulating water at a predetermined temperature. It is characterized by having heating means (for example, the heating device 21a in this embodiment) and oxygen supply means (for example, the oxygen supply device 21b in this embodiment) for supplying oxygen to the circulating water.
[0010]
With such a configuration, the present invention has a space-saving and simple structure in which odor gas is subjected to deodorization treatment by the oxidative decomposition action of microorganisms and water given in this deodorization treatment process is removed and discharged as a purification gas. The deodorizing apparatus which has can be provided.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, preferred embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a configuration diagram showing a deodorizing apparatus according to the present invention. As shown in FIG. 1, the deodorizing apparatus 1 in this embodiment performs deodorizing treatment on odor gas by the oxidative decomposition action of microorganisms, and removes water given in the deodorizing treatment process and discharges it as purified gas. An intake port 11 for sucking the odor gas G, a deodorization tower 20 that is communicated with the intake port 11 and is formed so that the odor gas G can pass therethrough, and a purified gas that has passed through the deodorization tower 20 and has been deodorized and dehumidified. And an exhaust port 12 for discharging G ′.
[0012]
The intake port 11 is provided above the water surface of a water storage tank 21 (located at the bottom of the deodorizing tower 20) and below the sprinkler 22. Moreover, the exhaust port 12 is provided in the position above the aeration layer 25 (it exists above the deodorizing tower 20) mentioned later.
[0013]
The deodorization tower 20 includes a water storage tank 21, a water spray device 22, a pump 23, a dripping layer 24, an aeration layer 25, and a fan device 26 in order from the bottom to the top.
[0014]
The water storage tank 21 is provided at the bottom of the deodorizing tower 20 and stores circulating water including a carrier on which microorganisms (aerobic microorganisms) are fixed. The water storage tank 21 includes a heating device 21a that heats and holds circulating water at a predetermined temperature (for example, about 30 ° C.), and an oxygen supply device 21b that supplies oxygen to the circulating water. The heating device 21a includes an electric heater, a temperature sensor (not shown), and the like, and always controls the water storage tank 21 to a predetermined temperature. The oxygen supply device 21b is composed of a blower (not shown) and a feed pipe for connecting air (oxygen) to the water storage tank 21 by connecting a discharge port and a base end of the blower. Supplying fresh air.
[0015]
With the above-described configuration, the water storage tank 21 is constantly heated and maintained at an appropriate temperature so as to promote the growth and activity of microorganisms contained in the circulating water and to smoothly and satisfactorily perform oxidative decomposition of odor components. Fresh air is being supplied.
[0016]
The microorganism used in the present invention is an aerobic microorganism having a deodorizing and water purification action. Moreover, although the said microorganisms can also be used independently, when the case where an odor component spreads into multiple components, or the environment where microorganisms are placed etc. is considered, it is desirable that they are multiple types. The microorganism can also be used as a complex of an enzyme having a deodorizing action and an aerobic microorganism.
[0017]
Aerobic microorganisms need to have an appropriate environment for the growth and reaction of microorganisms, that is, nutrition, temperature, moisture, oxygen, etc., in order to maintain the deodorizing and water purification actions. In that respect, when carrying out the present invention, nutrition can be taken from the odor component of the odor gas, and it is not necessary to supply nutrients separately. The temperature is always kept at a suitable temperature by the heating device 21a. Moisture circulates water from the water storage tank 21 to the water sprinkler 22 and sprinkles water from the water sprinkler 22 described later, so that there is always an appropriate humidity. Oxygen can be sufficiently replenished in the oxygen supply device 21b provided in the water storage tank 21, the water sprayed from the water spray device 22, and the aeration layer 25 described later. Therefore, it can be said that the inside of the deodorizing apparatus 1 is a good environment suitable for growing aerobic microorganisms and performing a deodorizing action, and if this environment can be maintained, the deodorizing / purifying action can be maintained for a long time. .
[0018]
Further, since the aerobic microorganism used in the present invention also has a water purification action, an additional effect of improving the water quality of the water in the water tank (circulated water) can be expected. Therefore, in this deodorizing apparatus, the water in the water storage tank does not need to be changed, and only needs to be supplied when necessary. Furthermore, since this apparatus can be sealed, it becomes easier to maintain a favorable environment for growing microorganisms in the deodorizing tower 20.
[0019]
The water sprinkling device 22 is provided above the water storage tank 21 and sprays circulating water (stored in the water storage tank 21) toward the water storage tank 21 in the form of water droplets or mist. . The watering device 22 is supplied with circulating water from the water storage tank 21 by a pump 23.
[0020]
With the above configuration, the water sprinkler 22 supplies oxygen to microorganisms contained in the water in the water storage tank 21 located below. In addition, since the water sprinkler 22 spouts the circulating water in the form of water droplets or mist when watering, the microorganisms in the sprinkled circulating water can efficiently come into contact with air (oxygen), and sufficient oxygen is supplied. It is possible to supply. At the same time, the sprinkled circulating water comes into contact with the odor gas G that is vented upward of the deodorization tower 20, takes in the odor component of the odor gas, and oxidizes and decomposes the odor component by the microorganisms carried in the moisture. The odor gas G is deodorized. Thus, the gas deodorized and containing moisture in the water sprinkler 22 is vented to the dropping layer 24 located above.
[0021]
The dripping layer 24 is provided above the water sprinkler 22 and is disposed by overlapping a plurality of substantially N-shaped metal plates at predetermined intervals (in order to make contact with more gas) in the left-right direction. is there.
[0022]
With the above configuration, in the dripping layer 24, by contacting the metal plate formed in a substantially N shape so that the gas deodorized by the water sprinkler 22 can be efficiently cooled, water in the gas is converted into water droplets, The water is dropped into the lower water storage tank 21 to remove moisture in the gas. Further, oxygen is also supplied to the microorganisms carried on the moisture adhering to the metal plate, and deodorization is performed by decomposing odor components in the gas. Thus, the gas dehumidified in the dropping layer 24 is vented to the aeration layer 25 located above.
[0023]
The aeration layer 25 is provided above the dropping layer 24 and is filled with a stainless fiber body.
[0024]
With the above configuration, since the aeration layer 25 is filled with the fibrous body, it is sufficiently diffused when the gas vented from the dripping layer 24 passes to increase the contact efficiency of air (oxygen) to the microorganism surface. It is possible to maintain the microbial activity and further improve the deodorizing effect. At the same time, the gas can be efficiently cooled, and the water that has not been dehumidified by the dripping layer 24 can be converted into water droplets to remove the water contained in the gas. The gas deodorized and dehumidified in the aeration layer 25 in this way becomes the purified gas G ′ and is ventilated to the fan device 26 located above the aeration layer 25.
[0025]
The fan device 26 is provided above the aeration layer 25, sucks the odor gas G from the intake port 11, passes the inside of the deodorization tower 10 from below to above (deodorized and dehumidified purified gas), and exhausts it. This is for discharging from the mouth 12 to the outside of the deodorizing tower 10.
[0026]
Next, the operation of the deodorizing apparatus 1 having the above configuration will be described. Odor gas G generated in a sewage treatment plant or other various factories is sucked from the intake port 11 by the fan device 26 and is ventilated from below to above in the deodorization tower 20.
[0027]
First, the odor gas G is sent to the lower part of the deodorizing tower 20, that is, above the water surface of the water storage tank 21 and below the water sprinkler 22, and comes into contact with the circulating water sprinkled from the water sprinkler 22 toward the water tank 21. And dissolved in the circulating water. At this time, the odor component in the odor gas G is oxidatively decomposed by microorganisms contained in the circulating water, and the odor gas G is deodorized.
[0028]
Next, the deodorized gas is sent to the dropping layer 24 located above, and is contacted while being sewed between substantially N-shaped metal plates to be cooled. At this time, the water in the gas is converted into water droplets and dropped into the water storage tank 21, and the gas is dehumidified.
[0029]
Subsequently, the dehumidified gas is sent to the upper aeration layer 25 and comes into contact with the filled fiber body. At this time, the odor component remaining in the gas is oxidatively decomposed and deodorized by microorganisms in the water contained in the gas. At the same time, the gas is cooled by coming into contact with the fibrous body, the water in the gas is converted into water droplets and dropped into the water storage tank 21, and the gas is dehumidified.
[0030]
The deodorized and dehumidified gas becomes the purified gas G ′ and is discharged out of the deodorizing tower 20 through the exhaust port 12 without applying a load to the fan device 26.
[0031]
As mentioned above, although the deodorizing apparatus of this invention was demonstrated, if it is a range which does not deviate from the summary of this invention, it can change suitably.
[0032]
For example, the position of the air inlet is not limited to the above embodiment, and the odor gas G sucked from the air inlet may be a position where the odor gas G sufficiently comes into contact with circulating water containing microorganisms ejected from the watering device. That's fine. As a specific example, as shown in FIG. 2, in the deodorizing apparatus 1 ′ according to the present invention, the air inlet 11 ′ disposed on the upper surface of the deodorizing tower 20 ′ and one end disposed inside the deodorizing tower 20 ′ A passage 30 ′ communicating with the air inlet 11 and having the other end opened at a position above the water surface of the water storage tank 21 and below the water sprinkler 22 is provided, and the odor gas G sucked from the air inlet 11 ′ passes through the passage 30. ′ May be configured to be in sufficient contact with circulating water (including aerobic microorganisms) that is vented from above to below and sprinkled by the sprinkler 22. In FIG. 2, parts having the same functions as those in the above embodiment are given the same reference numerals, and descriptions thereof are omitted.
[0033]
【The invention's effect】
As described above, the present invention includes an intake port that sucks odor gas, a deodorization tower that is communicated with the intake port so that odor gas can pass therethrough, and a purification that is deodorized and dehumidified through the deodorization tower. In a deodorization apparatus having an exhaust port for discharging gas, a water storage tank is provided at the bottom of the deodorization tower and stores circulating water containing a carrier on which microorganisms are immobilized, and is provided above the water storage tank. A sprinkler for spraying water in the form of water droplets or mist toward the water storage tank, a pump for supplying circulating water from the water storage tank to the water sprinkler, and a substantially N-shaped metal plate provided above the water sprinkler. A plurality of dropping layers arranged in a horizontal direction with a predetermined interval, an aeration layer provided above the dropping layer, filled with a stainless steel fiber body, and provided above the aeration layer, Gas is sucked in from the intake port and the inside of the deodorization tower is viewed from below And a fan device that passes the gas from the exhaust port to the outside of the deodorization tower, and the water storage tank includes a heating unit that heats and holds the circulating water at a predetermined temperature, and an oxygen supply unit that supplies oxygen to the circulating water. It is characterized by having.
[0034]
With such a configuration, the present invention has a space-saving and simple structure in which odor gas is subjected to deodorization treatment by the oxidative decomposition action of microorganisms, and water given in the deodorization treatment process is removed and discharged as a purification gas. The deodorizing apparatus which has can be provided.
[Brief description of the drawings]
FIG. 1 is a configuration diagram of a deodorizing apparatus according to the present invention.
FIG. 2 is a configuration diagram showing another example of a deodorizing apparatus according to the present invention.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Deodorizing device 11 Intake port 12 Exhaust port 20 Deodorizing tower 21 Water storage tank 21a Heating device (heating means)
21b Oxygen supply device (oxygen supply means)
22 Watering device 23 Pump 24 Dropping layer 25 Aeration layer 26 Fan device G Odor gas G ′ Purified gas

Claims (1)

An intake port for sucking in odor gas; a deodorization tower that is communicated with the intake port and formed to allow the passage of the odor gas; and an exhaust port that discharges purified gas that has passed through the deodorization tower and has been deodorized and dehumidified. In a deodorizing apparatus equipped with
A water storage tank for storing circulating water including a carrier on which microorganisms are fixed, provided at the bottom of the deodorization tower;
A watering device that is provided above the water storage tank and sprays the circulating water toward the water storage tank in the form of water droplets or mist;
A pump for supplying the circulating water from the water storage tank to the watering device;
A dripping layer provided above the watering device, and arranged by overlapping a plurality of substantially N-shaped metal plates in the left-right direction at predetermined intervals;
An aeration layer provided above the dropping layer and filled with a stainless steel fiber body;
A fan device that is provided above the aeration layer, sucks the odor gas from the intake port, passes the inside of the deodorization tower from below to above, and exhausts it from the exhaust port to the outside of the deodorization tower,
The dewatering apparatus, wherein the water storage tank includes a heating unit that heats and holds the circulating water at a predetermined temperature, and an oxygen supply unit that supplies oxygen to the circulating water.

Images