JP2000249324A - Method for deodorizing in refuse treating facility - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the capacity of an activated carbon type deodorizing unit, to control differential pressure of a refuse pit to prevent leakage of odor, to facilitate an operation of a hot stove for dryer or a deodorizing furnace, and to deodorize odor air as a combustion air of an incinerating furnace when the furnace is installed in parallel with an RDF manufacturing facility. SOLUTION: Odor air is collected from respective odor generating zones of an RDF manufacturing apparatus 1 to a refuse pit 2. Part of the collected odor air is sent from the pit 2 to a hot stove for a dryer or deodorizing furnace as combustion air. Simultaneously, its residue is sucked from the pit 2 by a deodorizing fan 6 through a deodorizing unit 5 so that the pit 2 is always held at a negative pressure. A differential pressure between the pit 2 and a platform 9 or the atmosphere is detected by a differential pressure gage 11, and an odor air amount is controlled so that the detected value falls within a predetermined range. Thus, the unit 5 is controlled to be operated.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deodorizing method in a waste treatment facility such as an RDF production facility.

[0002]

2. Description of the Related Art In an RDF manufacturing facility, an activated carbon adsorption type deodorizing device is mainly used as a deodorizing device for garbage odors. There is a problem that the air volume increases, the device becomes large, and both running cost and initial cost increase.

Conventionally, in an RDF manufacturing facility, as shown in FIG. 2, a waste pit (21), a receiving hopper (22), a conveyor
(23) Odor air was individually collected from odor generation zones such as crushers and RDF molding machines, and the collected odor air was mainly sent to a large activated carbon deodorizer (24) for treatment there.

[0004]

As described above, in the method of individually collecting the odor air from the odor generation zones and treating the collected odor air with the activated carbon type deodorizer, the size (capacity) of the deodorizer is as follows. Since the odor concentration is determined in proportion to the air flow regardless of the odor concentration, the deodorizing device is inevitably large in size, resulting in high cost.

[0005] The RDF manufacturing equipment has a portion that requires combustion air, such as a hot air stove for a dryer. If the combustion air in such a portion is replaced with odor air, the deodorizing device can be downsized. However, since the amount of combustion air of the dryer fluctuates, and since the RDF manufacturing equipment is not operated continuously all day, it is difficult to adjust the amount of odor air to be sent to the deodorizer and the amount of odor air to be sent to the dryer.

An object of the present invention is to provide a deodorizing method in a refuse disposal facility, which can solve the above-mentioned problems.

[0007]

SUMMARY OF THE INVENTION According to the present invention, odor air is collected in refuse pits from various odor generation zones of refuse treatment equipment, and a part of the collected odor air is discharged from the refuse pit to a hot air oven or a deodorizing furnace for a dryer. To the waste pit through a deodorizing device, and suck the remaining part through a deodorizing fan to keep the waste pit at a negative pressure.The differential pressure between the waste pit and the platform or atmosphere is detected. A deodorizing method in a refuse treatment facility, wherein the odor air amount is controlled so that the value falls within a required range, and the deodorizing device is controlled and operated accordingly.

[0008] A typical example of the refuse treatment facility is an RDF production facility for crushing combustible refuse and forming the crushed material into pellets by a molding machine to produce fuel. The odor generation zones at various places in the RDF manufacturing facility include conveyors, crushers, RDF molding machines, and the like.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing a first embodiment of the present invention;

In FIG. 1, the waste pit (2) and the receiving hopper (7) of the RDF manufacturing facility (1) are closed rooms. The combustible waste transported to the platform (9) by the packer truck opens the shutter (8) of the waste pit (2), and is supplied from here to the waste pit (2), where it is lifted and transported (10). The appropriate amount is sent to the receiving hopper (7).

[0011] Conveyor, crusher, RDF production equipment (1)
Odor air from the odor generation zone in various places such as RDF molding machines
Collected in the garbage pit (2) by the odor fan (3). Part of the collected odor air is sent from the garbage pit (2) to the hot air oven for dryer or deodorizing furnace attached to the RDF manufacturing facility (1) as combustion air by the combustion air fan (4).
Here, it is deodorized by combustion.

The remainder of the odor air is an activated carbon deodorizer.
After passing through (5), it is sucked from the garbage pit (2) by the deodorizing fan (6), and the inside of the garbage pit (2) is always kept at a negative pressure. Dust pit (2) and platform (9) by differential pressure gauge (11)
And a fan control signal based on the pressure difference is sent to the deodorizing fan (6).
The deodorizing fan (6) is controlled so that a certain pressure difference (preferably several mmHg to several tens of mmHg) is generated between (2) and the platform (9). Thus, the deodorizing device
(5) is controlled and the gas deodorized by the device (5) is released to the atmosphere.

When an incinerator is installed in the RDF production facility (1), the remainder of the odor air is sent out to the incinerator as combustion air without passing through the deodorizer (5), where it is burned. Deodorized.

[0014]

According to the method of the present invention, odor air is collected in garbage pits from odor generation zones in various places of garbage disposal facilities, and a part of the collected odor air is burned from the garbage pit to a hot air oven for a dryer or a deodorizing furnace. While sending it as air, the remaining part is sucked from the garbage pit through a deodorizing device with a deodorizing fan, and the garbage pit is always kept at a negative pressure. Since the odor air amount is controlled so as to be within the range, and the deodorizing device is controlled and operated by this, the following effects are obtained.

[0015] The capacity of the activated carbon type deodorizer can be reduced.

[0016] Since the garbage pit is subjected to differential pressure control, there is no fear of odor leakage.

The operation of a hot air oven or a deodorizing oven for a dryer can be easily performed.

When an incinerator is provided in the RDF production facility, deodorizing treatment can be performed using odorous air as combustion air for the incinerator.

[Brief description of the drawings]

FIG. 1 is a flow sheet showing an embodiment of the present invention.

FIG. 2 is a flow sheet showing a conventional technique.

[Explanation of symbols]

 1: RDF production equipment 2: Garbage pit 3: Odor fan 4: Combustion air fan 5: Activated carbon type deodorizer 6: Deodorization fan 7: Receiving hopper 8: Shutter 9: Platform 10: Lifting transfer machine

Continued on the front page F term (reference) 3K078 AA01 BA01 BA21 CA11 4D002 AB02 AC10 BA04 BA05 DA41 EA02 GA02 GA03 GB01 GB04 HA10 4D004 AA03 AC05 BA03 CA04 CA14 CA18 CA42 CA48 CB04 CB05 CB34 CB45 DA02 DA07

Claims (1)

[Claims] Claims 1. An odor air is collected in a garbage pit from odor generation zones in various places of a garbage disposal facility, and a part of the collected odor air is sent from the garbage pit to a hot air oven for a dryer or a deodorization furnace as combustion air. The remaining part is sucked from the garbage pit through a deodorizing device with a deodorizing fan, and the garbage pit is always kept at a negative pressure, and the differential pressure between the garbage pit and the platform or the atmosphere is detected so that this detection value is within a required range. Controlling the amount of odor air, thereby controlling and operating the deodorizing device.