JPS58112027A - Deodorizing apparatus - Google Patents

Abstract

PURPOSE:To obtain stable deodorizing capacity, by controlling the concn. of ozone based on the concn. and the humidity of a malodorous component to eliminate such a defect that the deodorizing capacity is lowered as humidity is raised. CONSTITUTION:The sulfuric malodorous component and the ammonia concn. of air 1 to be treated sucked by a blower 2 is measured by a malodorous component densitometer 3 constituted from a sulfur compound monitor and an ammonia monitor while the humidity of air 1 to be treated is measured by a humidity sensor 8 and the measured signals are put in an ozone conc. controller 4. The controller 4 controls the discharge power of an ozonizer 5 so as to adjust ozone concn. detected by an ozone monitor 9 to optimum concn. corresponded to the malodorous component and the humidity. Ozone mixed air to be treated is sent to a reaction tower 6 and deodorized on a catalyst by catalytic oxidation reaction due to ozone to be discharged as treated air 7. When activated carbon is used as the catalyst, the optimum concn. is 2-3times of the concn. of the malodorous component at humidity of 90% or less and about 3-4.5times at humidity of 90% or more.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a deodorizing device using ozone.

In recent years, interest in odor pollution has increased and the necessity of deodorizing devices has been emphasized, and deodorizing devices using various methods have been developed. For example, direct combustion type.

There are adsorption methods, chemical cleaning methods, etc., and each method has its advantages and disadvantages, so none of them has become mainstream. However, a catalyst-combined ozone oxidation deodorization device has been proposed, which uses activated carbon as an adsorption and oxidation catalyst to oxidize malodorous substances with ozone to make them odorless, and has begun to attract attention.

Special Publication in 1977 as a conventional catalytic ozone oxidation deodorization device
221!5, an example of which is shown in Figure 1.

In the figure, (1) is the air to be treated, (2) is the blower 0 (
3) is a malodor concentration measuring device, (4I is an ozone concentration controller.

(5) is an ozonizer, (61d reaction tower packed with catalyst, <7) is treated air.

Next, the operation will be explained.

Air to be treated (1) containing malodorous components such as hydrogen sulfide and ammonia is sucked in by a blower (2). Air to be treated (1)
The concentration of malodorous components inside is measured with a malodor concentration measuring device (3) consisting of a sulfur compound monitor and an ammonia monitor.
The ozone concentration controller (4) controls the ozonizer (5) based on this input signal.
Since the discharge power is controlled, ozone corresponding to the odor concentration is added to the air to be treated. The air to be treated containing ozone is oxidized and deodorized in a reaction tower (6) filled with a catalyst and released as treated air (7).

Since the conventional deodorizing apparatus is constructed as described above, it has the disadvantage that, for example, when activated carbon is used as a catalyst, the deodorizing performance rapidly decreases when the relative humidity of the air to be treated becomes 90 degrees or higher. This is because when the humidity increases, the surface of activated carbon, which is a catalyst, becomes clogged with moisture, even though it is hydrophobic, and the oxidation efficiency decreases.

This invention was made in order to eliminate the drawbacks of the conventional methods as described above, and aims to always obtain stable deodorizing performance by controlling ozone II degree control based on the concentration of malodorous components and humidity. It is said that

An embodiment of the present invention will be described below with reference to the drawings. In Figure 2, (8) is a sulfur compound monitor for measuring the concentration of sulfur-based malodorous components in the air to be treated (1), (9) is a humidity sensor for measuring humidity, and a is after ozone mixing. This is an ozone monitor for measuring the ozone concentration in the air being treated.

Next, the operation will be explained. The concentration of sulfur-based malodorous components and ammonia in the air to be treated (11) sucked in by the blower (2) is measured using a malodor concentration meter (3) consisting of a sulfur compound monitor and an ammonia monitor.
The humidity is measured by a humidity sensor (9) and input to the ozone concentration controller (4-6).

The ozone concentration controller (a-b) controls the ozonizer (5) so that the ozone concentration detected by the ozone monitor trout becomes a suitable ozone concentration corresponding to the malodorous component concentration and humidity.
11'tII control the force. The air to be treated mixed with ozone is sent to a reaction tower (61), is deodorized by a catalytic oxidation reaction with ozone on a catalyst, and is discharged as treated air (7).

Next, a method of setting the optimum ozone concentration will be explained. For example, when activated carbon is used as a catalyst, the optimal ozone concentration is 2 to 20% of the odor component concentration when the humidity is 110% or less.
About 3 times the humidity is sufficient, but if the humidity is higher than this, increase the humidity by 3 to 4 times.
It can be increased to about 5 times. However, the amount of ozone added above depends on the type of catalyst.

Since the reaction conditions vary, it is best to select them appropriately.

Since there is a limit to the ability of the ozonizer,
If the above-mentioned ozone concentration cannot be satisfied during actual operation, the operation will be performed at the maximum ozone concentration, but there is no practical problem because such a state will not last for a long time.

Further, in the above embodiment, in order to control the amount of ozone generated, the power of the ozonizer is controlled, but there is still 9 qi flowing into the ozonizer. Alternatively, the same effect can be achieved by controlling the flow rate of oxygen.

As described above, according to the present invention, since the ozone concentration is controlled based on the concentration of malodorous components and humidity, the drawback of conventional deodorizing devices that deodorizing performance decreases when humidity increases is eliminated.

It has the effect of always providing stable deodorizing performance.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a conventional deodorizing apparatus using ozone, and FIG. 2 is a block diagram showing a deodorizing apparatus according to an embodiment of the present invention. In the figure, (1) is the air to be treated, and (2) is the blower. (3) is a malodor concentration measuring device, and (4) is an ozone concentration controller. (5) is an ozonizer, (6) is a reaction tower, and (7) is treated air. (81C humidity sensor, C9) is an ozone monitor. Note that in the figures, the same reference numerals indicate the same parts. Agent Makoto Kuzuno - Commissioner of the Japan Patent Office 1. Display of small works Patent application Sho 56-21291NI
No. 2, Name of the invention ^ Device 3, Make the amendment h Representative Hitoshi Katayama Section 5, Column 6 for detailed explanation of the invention in the specification subject to the amendment, Contents of the amendment (Re) Page 3 of Book IjIIa Line 12: “Sex is suddenly k”
is corrected to "performance suddenly increased."that's all

Claims (1)

[Claims] Adding ozone generated by an ozonizer to the air to be treated,
In a deodorizing device configured to deodorize a reaction tower packed with a catalyst that promotes a catalytic oxidation reaction, a humidity sensor detects the humidity of the air to be treated, and a malodor sensor detects the concentration of malodorous components in the air to be treated. A component measuring device, an ozone monitor that detects the ozone concentration in the air to be treated, and a controller that controls the amount of ozone supplied from the ozonizer according to the detection values of these sensors, and the ozone concentration in the air to be treated is 1. A deodorizing device characterized in that the temperature is maintained at a predetermined value according to the humidity and the concentration of malodorous components in the air to be treated.