JPH05228335A - Smell treating device and smell treatment method - Google Patents

Abstract

PURPOSE:To enable the discharge of gas contg. smells after subjecting this gas to a deodorization treatment by disposing a surface ejection type gas push unit in one of smell generating sources and a surface absorption type gas pull unit in the other. CONSTITUTION:The smells are so joined with the clean gas of a low-speed laminar flow type so as to be included therein when this fresh air is blasted from the surface ejection type gas push unit 1 toward the smell generating source. The gas guided by the air flow of the laminar flow type arrives at the suction port of the surface absorption type gas pull unit 2 and is sucked at an equal velocity by the surface absorption type gas pull unit 2. The smells are thus absorbed without widely diffusing to the ambient, and further, the gas is discharged after the gas is subjected to the deodorization treatment by a deodorization discharge unit 3 connected to the surface absorption type gas pull unit 2. The odorous components are oxidized and cracked by ozone in the ozone reaction unit 6 in the deodorization discharge unit 3 and are subjected to the deodorization treatment. The treated gas is discharged through an adsorption filter cassette 8 to the outside by a discharge fun 5.

Description

Detailed Description of the Invention

[0001]

The present invention relates to, for example, a coating factory, a printing factory, a plastic processing factory, a fiber processing factory, a resin manufacturing / processing factory of acrylic resin, a plating factory, a rubber factory, a dry cleaning factory, a food processing factory, The present invention relates to an apparatus and method for treating odors generated in factories in various fields such as leather processing factories and chemical factories.

[0002]

BACKGROUND OF THE INVENTION In recent years, the housing problem has been increasing with the rise in land prices, and the housing is becoming more and more dense around the factory. For this reason, there is no buffer space between the factory and the house, and the odors generated in the factory are in trouble. That is, although a suction hood is provided above or at the side of the odor generation source as a measure against odors generated in factories and the like, and a means for exhausting it to the outside through a processing means such as a filter is adopted, as a measure against odors, It is not enough, and there are still many complaints from inside and outside the factory, and effective measures are awaited.

[0003]

DISCLOSURE OF THE INVENTION An object of the present invention is to provide an effective countermeasure against odor. An object of the present invention is to provide a surface ejection type gas push unit disposed on one side of an odor generation source, a surface suction type gas pull unit disposed on the other side of the odor generation source, and the surface suction type gas pull unit. And an odor eliminating exhaust unit connected to the odor eliminating device.

It is preferable that the surface jet type gas push unit is equipped with a flow straightening plate and is constructed so as to jet a laminar flow having a flow velocity of about 0.5 to 5 m / sec.
The surface suction type gas pull unit is equipped with a straightening plate,
It is preferable that the device is configured to suck gas at a flow rate of about 0.5 to 5 m / sec, and the deodorizing exhaust unit includes an ozone reaction unit, an adsorption unit and an exhaust means, and is a surface suction type gas pull unit. It is preferable that the gas supplied from the unit is processed by the ozone reaction unit, the adsorption process is performed by the adsorption unit, and the cleaned air is exhausted by the exhaust means.

Further, from the surface ejection type gas push unit disposed on one side of the odor generating source, about 0.
The surface jet type gas push unit is jetted at a flow rate of about 0.5 to 5 m / sec by a surface suction type gas pull unit disposed on the other side of the odor generation source while jetting a laminar flow having a flow rate of 5 to 5 m / sec. The odor treatment method is characterized in that the odor from the odor generating source that has merged with the gas from the above is sucked, the gas containing the sucked odor is deodorized, and then discharged.

The present invention will be described in more detail below. The surface ejection type gas push unit built into the odor treatment device is a straight push unit of the air curtain generation type straight type push unit that is divided into two stages and combined at right angles so that the pressure loss distribution of air circulation in the unit is By arranging the straightening vanes evenly, a wide laminar flow can be jetted. Incidentally, it is preferable that the jetting speed of the air flow is about 0.5 to 5 m / sec, but the control of this flow velocity is performed by controlling the blowing speed of the blowing means (for example, a blowing fan).

The surface suction type gas pull unit incorporated in the odor processing device has a wide suction port of the constant velocity suction unit and has a suction plate having upper and lower surfaces in the same direction as the suction port surface. By arranging a straightening vane for constant velocity suction inside, it becomes possible to suck the jet flow from the surface ejection type gas push unit at constant velocity. The gas suction speed is preferably about 0.5 to 5 m / sec, but the suction speed is controlled by controlling the suction speed of the suction means (for example, an exhaust fan).

When a clean, low-speed laminar flow type airflow from the surface jet type gas push unit is blown toward the odor generating source, the odors are merged so as to be entrained in the odor generating source and are guided to the laminar flow type airflow. Then, it reaches the suction port of the surface suction type gas pull unit, is sucked at a constant speed by the surface suction type gas pull unit, and the odor is sucked into the surface suction type gas pull unit without widely spreading to the surroundings.

The odor-containing gas sucked by the surface suction type gas pull unit is supplied to the ozone-containing gas phase and subjected to ozone treatment (the odor component is oxidized and decomposed by ozone) to be deodorized. The deodorized gas that has been subjected to this ozone treatment is passed through an adsorption filter layer containing granular activated carbon or fibrous activated carbon to remove residual odorous components by adsorption and to adsorb residual ozone. It is exhausted to.

At this time, not only the residual odorous components which have not been oxidized and decomposed by ozone are adsorbed by the adsorption filter, but also the residual ozone is adsorbed. Therefore, in the adsorption filter phase, the odorous component is again oxidized and decomposed by ozone over time, and the deodorizing process is reliably performed. Moreover, not only that, but as a result, the adsorption filter is regenerated, so that the durability of the adsorption filter becomes long and the running cost becomes low.

[0011]

1 to 3 show an embodiment of an odor treatment device and an odor treatment method according to the present invention, FIG. 1 is a schematic explanatory view of the entire odor treatment device, and FIG. 2 is a surface ejection type gas push. FIG. 3 is a schematic perspective view of the unit, and FIG. 3 is a schematic perspective view of a surface suction type gas pull unit and a deodorizing exhaust unit.

In each drawing, 1 is a surface jet type gas push unit, 2 is a surface suction type gas pull unit, and 3 is a deodorizing exhaust unit. The surface ejection type gas push unit 1 is disposed on one of the odor generating sources, and the surface suction type gas pull unit 2 is disposed on the other side of the odor generating source so as to face the surface ejection type gas push unit 1. .. When clean air is blown from the blower 4 to the surface ejection type gas push unit 1, the surface ejection type gas push unit 1 having a width A ₁ and a length L ₁ and an ejection port area of A ₁ × L ₁ An air flow having a discharge flow rate U ₁ and a discharge flow rate Q ₁ is jetted from the surface jet port, and a wide laminar flow air flow having a flow rate of about 0.5 to 5 m / sec is supplied toward the odor source.

The flow velocity U and the jet flow rate Q at the point where the laminar flow thus supplied is z away from the surface jet outlet of the surface jet type gas push unit 1 are represented by the following equation (1).
And (2).

[0014]

[Equation 1]

Therefore, the jet flow rate Q at the reaching distance z is proportional to the 1/2 power of the distance z, and is equal to 1 of the 1/2 width (a) of the surface jet port.
Since it is inversely proportional to the squared power, the larger the width A ₁ of the surface ejection port, the smaller the increase amount of the jet flow, that is, the so-called entrainment amount. Further, the central velocity of the jet flow is proportional to the 1/2 power of the width A ₁ of the surface jet outlet, so that the larger the width A ₁ of the surface jet outlet, the smaller the velocity attenuation of the jet flow. Therefore, the state close to the jet near the discharge point is maintained.

The jet Q is about 10 to 13 ° with respect to the center of the jet.
And the jet width X _L and the jet length X _LL are represented by the following equations (3) and (4). X _L = A ₁ + 2z · tan (ψ) (3) X _LL = L ₁ + 2z · tan (φ) (4) Then, the odor Q ₀ from the odor source is entrained in the jet Q and merges, and surface suction is performed. The airflow containing the odor, which is guided to the suction port of the mold gas pull unit 2 and reaches the surface suction port of the surface suction type gas pull unit 2, is sucked at a constant speed. That is, width A
_2, the length L ₂ in the A ₂ × surface suction type gas-pull unit suction velocity U ₂ from 2 faces the suction port having a suction port area of L _2, the suction flow rate _{Q 2 (U 2 × A 2} × L 2, Q + Q An airflow of ₀ or more, but it is preferable that the amount is substantially close) is sucked and is sucked at a flow velocity of about 0.5 to 5 m / sec. still,
This suction is performed by the exhaust fan 5 built in the deodorizing exhaust unit 3.

A wide, low-speed jet from the surface jet type gas push unit 1 has a small attenuation of the velocity at the jet center,
The jet flow of the surface jet type gas push unit 1 and the surface suction type gas have a large resistance to the air flow from the outside that disturbs and obstructs the combined jet of odors, that is, the disturbance air flow, and the change rate of the center velocity distribution is small. The amount of suction in the vicinity of the suction port of the pull unit 2 can be approximated, so that the odor can be efficiently sucked with the minimum amount of suction while actively preventing the external diffusion of the odor.

Gas sucked by the surface suction type gas pull unit 2 is sent to the ozone reaction unit 6 in the deodorization exhaust unit 3 by the exhaust fan 5, while ozone is sent to the ozone reaction unit 6 from the ozone generator 7. From the above, the odorous components are oxidized and decomposed by ozone in the ozone reaction unit 6, and the deodorizing process is performed. Then, the gas deodorized by ozone is exhausted to the outside by the exhaust fan 5 through the adsorption filter cassette 8 phase in the deodorizing exhaust unit 3. The adsorption filter cassette 8 is formed by filling granular activated carbon into a metal net or a resin net, or fibrous activated carbon in the form of a filter, and is configured to be easily attached and detached. The adsorption filter cassette 8 adsorbs the residual odor component that has not been oxidized / decomposed by ozone in the ozone reaction unit 6, and
It is for adsorbing residual ozone. That is, not only the residual odor component is adsorbed, but also ozone is adsorbed, whereby the odor component is again oxidized and decomposed by the ozone, and the deodorizing process is performed. As a result, the regenerating action of the adsorption filter cassette 8 is performed. It is done. That is, since the ozone has a half-life of 12 hours or more, the ozone adsorbed by the adsorption filter cassette 8 can effectively oxidize and decompose the odorous components adsorbed by the adsorption filter cassette 8, and The filter cassette 8 is regenerated.

Incidentally, the adsorption filter cassette 8 using ozone
Even if the regeneration is performed, the adsorption capacity of the activated carbon decreases after a long period of time, and therefore the adsorption filter cassette 8 is replaced at this time. Further, by using the adsorption filter as a dust collecting filter and stopping the ozone supply from the ozone generator 7, the device of the present invention can be used as a dust collecting treatment device.

By the way, hydrogen sulfide and coating odors were treated using the odor treatment device constructed as described above, and the results are shown in Tables 4-1 and 4-2 below.
The jet conditions of the surface jet type gas push unit 1, the suction conditions of the surface suction type gas pull unit 2 and the jet characteristics are shown in Tables 1, 2 and 3 below. Table 1 (Surface ejection type gas push unit 1) Surface ejection port width A ₁ 0.25 m Surface ejection port length L ₁ 1.0 m Surface ejection port area S ₁ 0.25 m ² Discharge flow rate U ₁ 2.9 m / sec Discharge Flow rate Q ₁ 0.725 m ³ / sec Table 2 (Surface suction type gas pull unit 2) Surface suction port width A ₂ 0.25 m Surface suction port length L ₂ 1.0 m Surface suction port area S ₂ 0.25 m ² suction Flow rate U ₂ 3.2 m / sec Suction flow rate Q ₂ 0.8 m ³ / sec Table 3 Distance z 0.5 m 1.0 m 1.5 m 2.0 Flow rate Q (m ³ / sec) 0.84 0.95 1. _{07 1.18 X L (m) 0.43} 0.60 0.78 0.96 X LL (m) 1.18 1.35 1.53 1.71 flow rate (calculated value, m / sec) 1.66 1.17 0.90 0.72 Velocity (measured value, m / sec) 1.51 1.16 1.01 1.44 Table 4-1 (Odor of hydrogen sulfide Concentration of about to) surface attraction type gas-pull unit after concentration adsorption filter cassette 8 after 2 H ₂ S concentration 0.1 ppm H ₂ S concentration 0ppm ozone concentration 2.5ppm ozone concentration 0ppm odor intensity 280 odor intensity 70 Table 4-2 ( About coating odor) Concentration after the surface suction type gas pull unit 2 Concentration after the adsorption filter cassette 8 Ozone concentration 2.7ppm Ozone concentration 0ppm Odor intensity 490 Odor intensity 350 * Odor intensity is according to Carmore Co., Ltd.'s Carmore-Σ According to the above, it is understood that effective deodorization of odor is performed.

[0021]

According to the present invention, odors can be effectively treated, and the countermeasures therefor are simple and the cost is low.

[Brief description of drawings]

FIG. 1 is a schematic explanatory diagram of an entire odor processing device.

FIG. 2 is a schematic perspective view of a surface ejection type gas push unit.

FIG. 3 is a schematic perspective view of a surface suction type gas pull unit and a deodorizing exhaust unit portion.

[Explanation of symbols] 1-face jet type gas push unit 2-face suction type gas pull unit 3 Deodorizing exhaust unit 4 Blower 5 Exhaust fan 6 Ozone reaction unit 7 Ozone generator 8 Adsorption filter cassette

Front page continuation (51) Int.Cl. ⁵ Identification code Office reference number FI technical display location B01D 53/34 120 B 6953-4D F24F 9/00 6925-3L

Claims (5)

[Claims] 1. A surface ejection type gas push unit disposed on one side of the odor generating source, a surface suction type gas pull unit disposed on the other side of the odor generating source, and a connection to the surface suction type gas pull unit. And a deodorizing and exhausting unit for removing odor. 2. The odor treatment device according to claim 1, wherein the surface ejection type gas push unit comprises a straightening plate and is configured to eject a laminar flow having a flow velocity of about 0.5 to 5 m / sec. .. 3. The odor treatment device according to claim 1, wherein the surface suction type gas pull unit comprises a straightening plate and is configured to suck gas at a flow rate of about 0.5 to 5 m / sec. 4. The deodorizing exhaust unit comprises an ozone reaction unit, an adsorption unit and an exhaust means, and the gas supplied from the surface suction type gas pull unit is processed by the ozone reaction unit and adsorbed by the adsorption unit. And then
The odor treatment device according to claim 1, wherein the odor treatment device is configured to exhaust the cleaned air by an exhaust means. 5. A surface jet type gas push unit disposed at one of the odor generating sources, and is directed to the odor generating source by about 0.5.
A laminar flow having a flow rate of ˜5 m / sec is ejected, and a surface suction type gas pull unit disposed on the other side of the odor generation source causes a flow rate of about 0.5 to 5 m / sec from the surface ejection type gas push unit. The odor treatment method is characterized in that the odor from the odor generating source that has merged with the gas is sucked, the gas containing the sucked odor is deodorized and then exhausted.