JP2001017822A - Deodorization apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a deodorization apparatus for deodorizing a malodorous gas. SOLUTION: A flue gas (a malodorous gas) (a) of an incinerator is released at once to a deodorization chamber 11 from a narrow duct 20. At first, a part of malodorous components in the malodorous gas are adsorbed in activated carbon of a deodorization filter 23. The malodorous gas (a) is sucked in a gas circulation system from a suction inlet 104 with a large size, heated by a condenser of a first system and cooled by a cooling apparatus to be a low temperature and low humidity gas. At that time, dehumidification is carried out to lower the humidity to about 10% and the malodorous gas (a) is almost completely dried. Evaporation of the malodorous components contained in the malodorous gas (a) is almost completely stopped and the remaining of the malodorous components are deodorized. The malodorous gas (a) is deodorized. The low temperature and low humidity gas is converted to be a chamber temperature low humidity gas having a chamber temperature by a condenser of a second system and discharged out of the booth.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deodorizing device, and more particularly to a deodorizing device for deodorizing odorous gas.

[0002]

2. Description of the Related Art Smell evaporates its odor component and diffuses it into the air. The odor component is introduced into the nasal cavity during breathing, thereby stimulating the nose olfactory nerve, and ultimately the central nervous system of the brain. By stimulating, you feel as smell. For example, in pig raising facilities, large amounts of pig manure are discharged daily. The smell impairs the general life of the local residents. Such an odor is generally called sensory pollution, and complaints from local residents around the facility are constant.

Conventionally, as a deodorizing device for removing such an odor, for example, devices of (1) an activated carbon adsorption system, (2) a microorganism treatment system, and (3) a chemical cleaning system are known. Among them, (1) the activated carbon adsorption type deodorizing device is a device in which air containing odor is brought into contact with the activated carbon stored in the device, and thereby the odor components in the air are adsorbed by the activated carbon to deodorize. The (2) chemical deodorizing type deodorizing device is a device for deodorizing by, for example, a neutralization reaction with various acids or alkali solutions, an oxidative decomposition reaction with sodium hypochlorite, or the like. Furthermore, (3) a deodorizer using microorganisms is a device that removes odor components that become odor sources by contacting odor gas with useful microorganisms that are packed in a packed tower and decompose ammonia and formaldehyde. .

[0004]

However, according to such a conventional technique, there are the following problems. In other words, the activated carbon adsorption type deodorizer of (1) uses a mass activated carbon or granular activated carbon, and has a problem in that the adsorption ability of the odor components contained in the odor gas is inferior to other devices. Was. Further, in the case of the chemical cleaning type (2), there is a problem that it is extremely difficult to select a substance that effectively reacts to a variety of malodorous components. Furthermore, in the case of the microorganism treatment type (3), there is a problem that the equipment becomes large-scale, and the equipment cost and the running cost increase.

[0005] Therefore, the inventor of the present invention has conducted intensive studies,
The odor component in the odor gas was found to be odorless only after the moisture (humidity) in the gas was evaporated. Evaporation refers to the phenomenon of vaporization occurring only on the surface of a liquid or solid. In liquids, it occurs at a temperature below the boiling point and boils at the boiling point. In the case of solid, it is called sublimation. Evaporation proceeds at a given temperature until the pressure (vapor pressure) of the gas phase becomes constant (saturated vapor pressure, sublimation pressure), where it reaches an equilibrium state. Therefore, the inventors have found that if the water is completely removed from the odorous gas, it is possible to deodorize even a bad odor, and completed the present invention.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to provide a deodorizing device capable of deodorizing odorous gas.

[0007]

According to the first aspect of the present invention, an odor gas sucked from the suction port is heated in a gas flow line communicating the suction port and the air blowing port formed in the machine frame. A first heating unit for cooling, a cooling and dehumidifying unit for cooling and dehumidifying the odor gas heated by the first heating unit;
This is a deodorizer provided with second heating means for increasing the temperature of the low-temperature odor gas dehumidified by the cooling and dehumidifying means to a set temperature.

[0008] The use of the deodorizer is not limited. For example,
It can be used for deodorizing exhaust gas discharged from refuse incinerators, for air conditioning in pachinko parlors, or as an air curtain. Representative odor components of the odor gas removed include, for example, sulfur compounds (methyl mercaptan, ethyl mercaptan, dimethyl sulfide, diethyl sulfide, hydrogen sulfide), nitrogen compounds (methylamine, ethylamine, trimethylamine, ammonia), hydrocarbons ( Butylene), aliphatic compounds (butyric acid, acetone, acrolein) and the like. Further, the types of the first heating means and the second heating means are not limited. For example, various heaters such as an electric heating type and a steam heating type may be used, and a condenser of an air conditioner may be used.

[0009] The type of cooling and dehumidifying means is not limited. For example, a cooler of an air conditioner and the like can be mentioned. By the way, the dehumidifying effect of the cooling and dehumidifying means becomes better as the temperature difference between the odor gas before and after cooling across the cooling and dehumidifying means of the gas flow system is larger. Based on this, in the present invention, the odor gas before cooling is heated, and by cooling the heated odor gas, moisture in the gas is captured as dew (water droplets), and then the dried air after cooling is cooled. Is warmed to approximately room temperature and returned to the room. In addition, this deodorizing device
A high deodorizing effect can be obtained by connecting a plurality of units. That is, the blowing port of the downstream deodorizing device and the intake port of the upstream deodorizing device are sequentially communicated. The number of connected deodorizing devices is not limited. It is sufficient if two or more are used.

According to a second aspect of the present invention, in the first aspect, a deodorizing filter having a deodorizing agent for adsorbing the odor of the odorous gas is provided in at least one of the suction port, the air blowing port, and the gas flow system. It is a deodorizing device of the description. The position where the deodorizing filter is attached is not limited. Any of an inlet, a blower, and a gas circulation system may be used. Further, the number of deodorizing filters provided is not limited. For example, 1
Or two or more locations. The type of deodorant is not limited. Usually, it is a physical adsorbent such as activated carbon, but may be a chemical adsorbent such as an ion exchange resin or impregnated carbon. As the chemical adsorbent, for example, a porous activated alumina having an oxidizing agent such as potassium permanganate impregnated thereon, a activated carbon and a base composed of a metal oxide impregnated, and a synthetic activated carbon-based And the like.

[0011]

According to the present invention, the odor gas sucked into the gas flow system from the suction port is first heated by the first heating means and raised to a predetermined temperature. Thereafter, the heated odor gas is cooled by a cooler and dehumidified. At this time, only the moisture (water) contained in the odor gas is removed. As a result, the odor component of the odor gas becomes almost completely dry.
As a result, evaporation of the odor component is stopped, and the odor component is deodorized. Next, the cooled odor gas is heated to room temperature by the second heating means, and then discharged out of the machine through the air outlet. The deodorizing method according to the present invention differs from, for example, direct combustion of odor gas using a heater (usually at 600 to 800 ° C.), in which the odor gas is dried with a high dehumidifying power. Therefore, the possibility that a foreign compound is generated due to incomplete combustion at the time of heating of the direct combustion and another malodor is generated is eliminated. The direct combustion method is a deodorization method in which odor components are oxidized and decomposed to change into carbon dioxide gas and water (steam).

In particular, according to the invention of claim 2, not only the deodorizing effect due to the high dehumidifying and drying performance using the deodorizing device,
The deodorant of the deodorizing filter is used to adsorb and remove the odor components of the odorous gas. Thereby, the odor gas can be more completely deodorized.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a deodorizing apparatus according to a first embodiment of the present invention will be described. Note that, for convenience of explanation, the X direction is the machine length direction of the deodorizing storage housing the deodorizing device, the Y direction is its machine width direction, and the Z direction is its height direction. FIG. 1 is a longitudinal sectional view of a deodorizing storage in which a deodorizing device according to an embodiment of the present invention is incorporated.

In FIG. 1, reference numeral 10 denotes a deodorizing apparatus according to a first embodiment of the present invention. The deodorizing apparatus 10 removes substantially all the moisture contained in the odor gas a and completely drys the odor gas a to thereby completely remove the odor gas. This is a device for deodorizing a. The deodorizing apparatus 10 has a deodorizing chamber 11 whose wall plate is formed of a heat insulating panel and is long in the X direction. In the vicinity of the wall plate 11a on one side in the X direction in the deodorizing chamber 11, the deodorizing device 10
Is stored. Further, one end of an odor gas duct 20 communicating with an exhaust gas port of a refuse incinerator (not shown) is communicated with an upper portion of a wall plate 11b on the other side in the X direction in the deodorization chamber 11. Also, the ceiling plate 11c of this deodorization storage 11
Near the end on the side of the deodorizing device 10, a processing gas duct 21 having one end connected to an air outlet 105 of the deodorizing device 10 is disposed.

The deodorizing device 10 has a high deodorizing effect by cooling the gas in the refrigerator, which has been heated to a predetermined temperature in advance, with a cooler to dehumidify the gas, and then raising the temperature of the cooled gas to room temperature. Is obtained. In the vicinity of the outside of the suction port 104 of the deodorizing device 10, a deodorizing filter 23 filled with a deodorant, which is granular activated carbon, is extended via an intake hood 22 so as to cover the suction port 104 from outside. Have been.

Next, the deodorizing apparatus 10 will be described in detail with reference to FIGS. FIG. 2 is a longitudinal sectional view of the deodorizing apparatus according to the first embodiment of the present invention. FIG. 3 is a front view of the deodorizing apparatus according to the first embodiment of the present invention. FIG.
1 is a piping system diagram of a deodorizing apparatus according to a first embodiment of the present invention. As shown in FIGS. 2 and 3, the deodorizing device 10
It has a vertically long machine frame 102 which is a main body. Machine frame 102
A large suction port 104 having a dust filter 103 stretched on the back surface is formed in the entire lower portion of the front plate. The air outlet 105 is formed in the entire upper end of the front plate. The air outlet 105 is covered by one end of the processing gas duct 21 from outside. Machine frame 1
Inside 02, a vertically long gas flow system 106 that communicates the suction port 104 and the blow port 105 is provided.

The system of the gas flow system 106 includes an inlet 1
A first internal condenser (first heating means) 107 that constantly heats the odorous gas a in the room from the air inlet 04 toward the air outlet 105, that is, from the downstream to the upstream, and A cooler (cooling and dehumidifying means) 108 for cooling and dehumidifying the odor gas a heated by the condenser 107;
A second in-system condenser (second heating means) 109 for raising the temperature of the low-temperature gas dehumidified in step 08 to a set temperature is provided. The first in-system condenser 107, the cooler 108, and the second in-system condenser 109 are connected to the gas flow system 1
06 is installed in an inclined state from the center to the upper part. As a result, the deodorizing device 10 becomes compact, and at the same time, the heat exchange area can be increased. The area of the suction port 104 is four times or more the area of the blow port 105. As a result, the flow rate of the gas passing outside the first in-system condenser 107, the cooler 108, and the second in-system condenser 109 arranged in the gas flow system 106 is reduced, and the dehumidifying effect and the The deodorizing effect of the odor gas a is further improved.

In the lower part of the machine frame 102, a water-cooled external condenser 110 is provided outside the gas flow system 106.
, A refrigerant compressor 111, a liquid receiver 112, and an accumulator 113. A thermostat 114 for temperature detection is fixed to the back of the center of the front plate of the machine casing 102. Since the water-cooled out-of-system condenser 110 is employed, the out-of-system condenser 110, the compressor 111, etc.
2, the device can be made compact as a whole. The external devices of the gas flow system 106 may be separately provided outside. At the upper end of the machine frame 102, a blower 1
The drive motor 116 is mounted on a partition plate on the side of the drive motor 15 via a belt-type power transmission system. 2 and 3, 117a and 117b
Is a drain pan, and 118 and 119 are drain pipes.

Next, the piping state of various devices used in the deodorizing apparatus 10 will be described with reference to FIG. FIG.
In the piping system diagram of FIG. 1, inside the deodorizing device 10, a closed refrigerant circulation circuit A of a compressor 111 → a first in-system condenser 107 → a liquid receiver 112 → a cooler 108 → an accumulator 113 is provided. I have. The compressor 111 and the first
From the inside of the in-system condenser 107, the second in-system condenser 10
9 and a bypass passage B2 having the external condenser 110.

The ends of the bypass passages B1 and B2 are connected directly or indirectly to the liquid receiver 112, respectively.
At the base of each of the bypass paths B1 and B2, there is provided a solenoid valve 1 which is an example of a switching means connected to the thermostat 114.
20, 121 are provided. A capillary tube 122 is provided upstream of the cooler 108 of the refrigerant circuit A. In addition, 123 is a check valve. Based on the temperature detected by the thermostat 114, the solenoid valves 120, 121
Open and close so that one is always open and the other is closed. By operating as described above, the compressed refrigerant from the compressor 111 is supplied to the refrigerant circuit A (the refrigerant is always flowing) and the bypass B1 or the bypass B2.
(The refrigerant flows into one of them).

Next, the operation of the deodorizing apparatus 10 according to the first embodiment of the present invention will be described. As shown in FIGS.
Exhaust gas discharged from the refuse incinerator flows into the deodorizing chamber 11 from the odor gas duct 20. At this time, the odor gas a is discharged from the narrow odor gas duct 20 into the wide deodorizing chamber 11 at a stretch. Therefore, the accumulate effect occurs, and the odor gas heated in the refuse incinerator is cooled. At this time, in the deodorizing apparatus 10, the rotation of the blower 115 causes the deodorizing chamber 11 to pass through the deodorizing filter 23.
The odor gas a is sucked into the gas flow system 106. Thereby, the activated carbon filled in the deodorizing filter 23 adsorbs 10% or less of the odor component contained in the odor gas a.

If the temperature detected by the thermostat 114 is equal to or lower than the set temperature, the solenoid valve 120 on the bypass passage B1 is opened, the solenoid valve 121 on the bypass passage B2 is closed, and the compressor 111 The discharged high-temperature, high-pressure refrigerant
Control is performed so as to flow into the refrigerant circuit A and the bypass B1. In the refrigerant circuit A, a part of the refrigerant is liquefied while passing through the first in-system condenser 107, and then temporarily stored in the liquid receiver 112. Then, the capillary tube 122
Is supplied to the cooler 108. In the cooler 108,
The vaporized heat is taken from the surroundings and vaporized. Thereafter, the liquid is temporarily stored in the accumulator 113 and sent to the compressor 111 again. Thereafter, these steps are sequentially repeated. Further, by opening the solenoid valve 120, the remaining portion of the refrigerant flows into the bypass B1. The refrigerant in the bypass B1
Liquefied while passing through the in-system condenser 109, and then flows between the first in-system condenser 107 of the refrigerant circuit A and the liquid receiver 112. The subsequent steps are the same as in the case of the refrigerant circuit A. Next, the odor gas a when the temperature is equal to or lower than the set temperature is used.
A description will be given based on the flow of FIG.

The odor gas a in the refrigerator is slowly drawn into the gas flow system 106 from the large suction port 104 by the suction force of the blower 115. When passing through the suction port 104, as described above, after deodorizing some odor components by the deodorizing filter 23, dust is removed by the dust removing filter 103. The drawn odor gas a is first heated by the first in-system condenser 107 and then cooled by the cooler 108 to become a low-temperature and low-humidity gas.

At this time, since the temperature of the odor gas a before cooling is increased by the first in-system condenser 107, the temperature difference between the gas before and after cooling does not use the conventional first in-system condenser 107. It is larger than in the case of a dehumidifier. Therefore, for example, in the conventional dehumidifier, the relative humidity in the room is about 60%, which is the limit of dehumidification, but in the deodorizer 10, it can be reduced to about 10%. At this time, a highly accurate dehumidifying effect is obtained, and the odor gas a is almost completely dried. As a result, the evaporation of the odor component contained in the odor gas a is almost completely stopped, whereby 90% or more of the remaining odor component is deodorized. Thereby, the odor gas a is deodorized. Next, the cooler 108
The low-temperature and low-humidity gas that has passed through is heated to, for example, the internal temperature by the second in-system condenser 109 to become the internal temperature low-humidity gas b. Thereafter, the air is discharged from the blower outlet 105 and the processing gas duct 21 to the outside of the refrigerator via the blower 115. Of course, the discharged gas b is an odorless gas having no odor.

If the temperature is equal to or higher than the temperature set by the thermostat 114, the solenoid valve 120 on the bypass passage B1 is closed, the solenoid valve 121 on the bypass passage B2 is opened, and the refrigerant from the compressor 111 is supplied to the refrigerant. Circuit A and bypass B
Control to flow into 2. The process in which the refrigerant flows through the refrigerant circuit A is the same as the case where the detected temperature of the thermostat 114 is equal to or lower than the set temperature, and therefore the description is omitted. Since the solenoid valve 121 is open, the remainder of the refrigerant flowing to the refrigerant circuit A flows into the bypass B2. In the bypass passage B2, the high-temperature and high-pressure refrigerant is liquefied while passing through the external condenser 110 and directly flows into the liquid receiver 112. The subsequent steps are the same as in the case of the refrigerant circuit A described above.
Next, a description will be given based on the flow of the odor gas a when the temperature is equal to or higher than the set temperature.

The odor gas a drawn into the gas flow line 106 from the suction port 104 is heated in advance by the first in-system condenser 107, then cooled by the cooler 108 and directly blown as low-temperature low-humidity gas c. Mouth 105
Is returned to the room. At this time, the external condenser 110 provided outside the system of the gas flow system 106 does not participate in any change in the temperature or humidity of the odor gas a. That is, the basic structure is the same as a general refrigeration cycle. by the way,
If the evaporating temperature of the refrigerant is set to be lower than the set temperature, the cooler 108 may be excessively cooled, causing frost formation and freezing. However, the odor gas a is
8, the hot air is heated by the first in-system condenser 107, and the heat melts the frost and ice attached to the cooler 108 while passing through the cooler 108. This prevents frost and freezing of the cooler 108 even at the time of setting the low temperature, and enables dehumidification at lower temperature and lower humidity. Thereby, thermostat 1
Even when the detected temperature of No. 14 is equal to or lower than the set temperature, a high deodorizing effect can be obtained. That is, through the blower 115,
05, gas c outside the processing chamber from the processing gas duct 21
Becomes odorless as in the case of the storage temperature low humidity gas b.

Next, a deodorizing apparatus according to a second embodiment of the present invention will be described with reference to FIG. FIG. 5 is a longitudinal sectional view of a deodorizing storage in which a deodorizing device according to a second embodiment of the present invention is incorporated. As shown in FIG. 5, the deodorizing device according to the second embodiment includes a first deodorizing device 30A provided inside the deodorizing storage 11 and a second deodorizing device 30B provided outside the storing device. It is two. These deodorizing devices 30A, 30
B does not have a deodorizing filter. Instead, the gas b1 and c1 deodorized by the first deodorizing device 30A and the amount of the deodorizing component is suppressed to 10% or less are transferred to the processing gas duct 21A whose downstream side reaches the suction port 104 of the second deodorizing device 30B. Through the second deodorizing device 30
B is supplied into the gas circulation system 106. Then, a second deodorizing treatment is performed. Thus, the same deodorizing effect as in the first embodiment can be obtained.

[0028]

According to the present invention, the odor gas, which has been heated to a predetermined temperature in advance, is cooled by a cooler to dehumidify it, and then the cooled gas is heated to room temperature, whereby the odor gas is removed. Since the device in which evaporation of the odor component is stopped and a high deodorizing effect is obtained, the odor gas can be deodorized.

In particular, according to the second aspect of the present invention, a deodorizing filter having a deodorizing agent for adsorbing the odor of the odorous gas is provided at at least one of the suction port, the blowing port and the gas flow system. In addition, the odor gas can be completely deodorized.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view of a deodorizing storage in which a deodorizing device according to a first embodiment of the present invention is incorporated.

FIG. 2 is a longitudinal sectional view of the deodorizing apparatus according to the first embodiment of the present invention.

FIG. 3 is a front view of the deodorizing apparatus according to the first embodiment of the present invention.

FIG. 4 is a piping system diagram of the deodorizing apparatus according to the first embodiment of the present invention.

FIG. 5 is a longitudinal sectional view of a deodorizing storage in which a deodorizing device according to a second embodiment of the present invention is incorporated.

[Explanation of symbols]

 10, 30A, 30B deodorizing device, 23 deodorizing filter, 102 machine frame, 104 suction port, 105 blower port, 106 gas flow system, 107 first internal condenser (first heating means), 108 cooler (cooling) Dehumidifying means), 109 second in-system condenser (second heating means), a odorous gas.

 ──────────────────────────────────────────────────続 き Continued on front page F term (reference) 4C058 AA19 BB02 CC04 CC07 CC08 EE15 4D002 AB02 AC04 AC10 BA04 BA12 BA13 BA14 CA07 CA20 DA41 EA02 GA02 GA03 GB01 GB02 GB03 GB20 4D052 AA00 AA10 BA04 BA07 BB08 FA05 FA08 GA01 GB03 GB00 GB03 GB08

Claims (2)

[Claims] A first heating means for heating an odor gas sucked from the suction port in a gas flow system communicating the suction port and the air blowing port formed in the machine frame; A deodorizing apparatus comprising: cooling dehumidifying means for cooling and dehumidifying odor gas heated by the means; and second heating means for heating the low-temperature gas dehumidified by the cooling and dehumidifying means to a set temperature. 2. The deodorizing apparatus according to claim 1, wherein a deodorizing filter having a deodorizing agent for adsorbing the odor of the odorous gas is provided in at least one of the suction port, the blowing port and the gas flow system.