JPS6246120A - Foul odor gas treating method - Google Patents

Abstract

PURPOSE:To treat at low cost foul odor generated from a human wastes treating plant and a sewage plant by blowing waste gas etc. containing high concentration foul odor into a burning chamber of an incinerator as incinerator temp. control air. CONSTITUTION:Waste gas generated from a human wastes treating plant 1 and a sewage plant 2 and having high concentration foul odor with a large quantity of H2S is blown into a burning chamber 5 of an incinerator 4 as control air for temp. of the incinerator and its foul odor is treated by thermal cracking. On the other hand, low concentration foul-odor waste gas containing little H2S is introduced into a chamber 9 by a blower 8 and added together to foul odor from a waste pit 10 and the mixture is blown from the underside of a fire grating as burning air via a gas type air preheater 12 and low concentration foul odor and foul odor from the waste pit are deodorized and treated simultaneously. Thus, strong corrosive waste gas containing H2S in strong foul odor gas is directly blown into the burning chamber as control air for temp. of the incinerator and therefore, corrosion of the incinerator equipment can be prevented.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a method for treating malodorous gas generated from human waste treatment equipment and sewage treatment equipment.

(Prior art and its problems) Malodorous gases (high-concentration odor and low-concentration odor) generated from human waste treatment equipment are generally treated by a combination of cleaning with chemicals and activation (adsorption by main flame), and then released into the atmosphere. ing.

Similar treatment is also generally applied to foul-smelling gas (sludge dryer exhaust gas) generated from sewage treatment equipment.

However, this processing method has a problem in that the initial cost, particularly the running cost, is extremely high.

(Problems to be Solved by the Invention) The present invention aims to provide a method for inexpensively treating foul-smelling gases generated from human waste treatment equipment and sewage treatment equipment using a garbage incinerator.

(Structure of the Invention) That is, the present invention blows exhaust gas containing highly concentrated odor generated from at least one of a human waste treatment device and a sewage treatment device and exhaust gas from a sludge dryer into the combustion chamber of a garbage incinerator as air for controlling furnace temperature. In this method, a part or all of the exhaust gas containing low-concentration odor generated from at least one of the two treatment devices is blown as combustion air from under the grate of the garbage incinerator.

(Example) The present invention will be described below with reference to illustrative embodiments.

Exhaust gas containing a highly concentrated odor generated from at least one of the human waste treatment equipment all and the sewage treatment equipment 2 is blown into the combustion chamber 5 of the waste incinerator 4 as air for furnace temperature control by the air blower a3.

As a result, the odor in the exhaust gas is thermally decomposed and odor treatment is performed.

The reason why this exhaust gas is not blown in as combustion air but as furnace temperature control air is as follows.

The exhaust gas containing the high concentration odor contains a large amount of hydrogen sulfide H, S.
Contains. Is this the ventilation system for this exhaust gas waste treatment facility? If the combustion air is blown from below the grate along with the odor of the waste bits, corrosion of the blower, grate, and equipment related to the pond incinerator will occur. Therefore, in this invention, the exhaust gas is directly blown into the combustion chamber 5 to prevent corrosion.

The exhaust gas from the sludge dryer 6 is also transferred to the waste incinerator 4.
The air is blown into the combustion chamber 5 by the blower 7 as air for controlling the furnace temperature. As a result, the odor in the exhaust gas is thermally decomposed and odor treatment is performed.

The reason why this exhaust gas is not blown in as combustion air but as furnace temperature control air is as follows.

The temperature of the sludge dryer exhaust gas is approximately 80°C, and when it is cooled, a strongly acidic drain is formed. Therefore, if this exhaust gas is blown from below the grate as combustion air using the ventilation system of the waste treatment facility, the problem of corrosion of the incinerator equipment will occur.

Therefore, this exhaust gas is blown directly into the combustion chamber 5 to prevent corrosion.

On the other hand, the processing device? , 2 containing low concentration odor is sent to a chamber 9 by a blower 8
This is combined with the odor of the waste bits 10, and is blown into combustion air from below the grate via a gas air preheater 12 by a forced air blower 11, and a portion is also sent into the combustion chamber 5 for furnace temperature control. In this way, low-concentration odors and trash bit odors can be deodorized at the same time.

The reason why low-concentration odor can be injected as combustion air is because low-concentration odor contains extremely less hydrogen sulfide H and S than high-concentration odor.
This is because there is no need to worry about corrosion of waste incinerator equipment.

In actual operation, when the temperature inside the furnace is low such as when the furnace is started up, shut down, or during a power outage, or when the furnace is out of operation and only human waste treatment is being performed, highly concentrated odors and sludge drying exhaust gas are removed from the deodorizing furnace. 1
3, deodorized by thermal decomposition, and then released into the atmosphere. In addition, low-concentration odors are deodorized with activated carbon I4 and then released into the atmosphere.

(Effects of the Invention) According to the present invention, bad smells generated from human waste treatment equipment and sewage treatment equipment can be pyrolyzed and deodorized at low running costs by being blown into a burning garbage incinerator. Moreover, among these malodorous gases, highly corrosive highly concentrated malodorous gases and sludge dryer exhaust gas are directly blown into the combustion chamber as air for furnace temperature control, thereby preventing corrosion of the waste incinerator equipment.

[Brief explanation of drawings]

The drawing is an explanatory diagram of a malodorous gas treatment method showing an embodiment of the present invention. 1... Human waste treatment equipment, 2... Sewage treatment equipment, 3...
・Blower, 4... Garbage incinerator, 5... Combustion chamber, 6.
...Sludge dryer, 7...Blower, 8...Blower, 9
-...Chamber, 10...Garbage bit, 11...Forced air blower, 12...Gas type air preheater, I3...Deodorizing furnace, I4...Activated carbon.

Claims (1)

[Claims] Blowing exhaust gas containing highly concentrated odor generated from at least one of the human waste treatment equipment and the sewage treatment equipment and the exhaust gas from the sludge dryer into the combustion chamber of the garbage incinerator as air for furnace temperature control,
and a malodorous gas treatment method in which part or all of the exhaust gas containing low concentration odor generated from at least one of the two treatment devices is blown as combustion air through the grate of the garbage incinerator.