JP2001104948A - Apparatus and method for treating organic matter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide the subject apparatus and method capable of effectively decomposing organic matter in sewage or slurry-like matter without requiring large-scaled combustion equipment or pressure equipment and large treatment cost. SOLUTION: An organic matter treatment apparatus is equipped with a storage tank 1 capable of housing organic matter-containing sewage or slurry- like matter, a stirring means 5 for stirring the sewage or slurry-like matter housed in the storage tank 1 and an ultrasonic irradiation means 4 for irradiating the sewage or slurry-like matter with ultrasonic waves.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an organic material processing apparatus and an organic material processing method, and more particularly, to dioxins, PCs, and the like.
The present invention relates to an organic substance treating apparatus and an organic substance treating method for decomposing and treating organic substances in waste water or slurry by irradiating ultrasonic waves to waste water or slurry containing organic substances such as B.

[0002]

2. Description of the Related Art Organic chlorine compounds such as dioxins, PCBs, and trichloroethylene are highly toxic and harmful organic substances, and these organic substances contained in an object to be treated must be surely decomposed to make them less toxic or harmless. Is required. In particular, when the material to be treated is liquid, the treatment is troublesome and time-consuming, and the treatment method is also limited.Conventionally, as detoxification treatment of liquid waste containing these harmful organic substances, a nozzle is used. There is a supercritical water treatment method in which a combustion treatment is performed while spraying with water, or a special high-pressure vessel is charged and treated under high temperature and high pressure.

[0003]

SUMMARY OF THE INVENTION However, PCB
The method of burning treatment requires heating to 1,100 ° C or higher, and the method of supercritical water treatment involves oxidative decomposition using water exceeding 374 ° C and 22 MPa, the former requiring large-scale combustion equipment. The latter requires pressure-resistant equipment and the like, and all require a large running cost.

[0004] Decomposing microorganisms (so-called bioremediation) are also being discovered and used for decomposing microorganisms. At present, however, the rate of decomposition of harmful organic substances by microorganisms is low, and large amounts of harmful organic substances are rapidly removed. It is difficult to detoxify efficiently.

Further, the detoxification treatment of a slurry in which solids such as sludge, powder, and earth and sand are mixed in an object to be treated containing a harmful organic substance may cause the harmful organic substance to be strongly adsorbed to the solid substance. Therefore, the treatment is more troublesome than simply treating a liquid material, and requires a long treatment step and large-scale facilities to decompose and detoxify the organic matter, and requires a large treatment cost.

Accordingly, an object of the present invention is to reduce the organic matter in sewage or slurry-like materials without requiring large-scale combustion equipment or pressure-resistant equipment and a large treatment cost in view of the above-mentioned problems of the prior art. It is an object of the present invention to provide an organic substance processing apparatus and an organic substance processing method capable of performing a decomposition process.

[0007]

The above object is achieved by the invention described in each claim. That is, the characteristic configuration of the organic matter treatment apparatus according to the present invention includes a storage tank capable of storing wastewater or a slurry-like substance containing an organic matter, a stirring means for stirring the wastewater or the slurry-like substance contained in the storage tank, Alternatively, an ultrasonic irradiation means for irradiating ultrasonic waves to the slurry-like material is provided.

According to this structure, the cavitation caused by the irradiation of the ultrasonic irradiation means acts strongly and effectively on the sewage or slurry-like substance in the storage tank by the irradiation of the ultrasonic irradiation means with the cooperation of the stirring means. In addition, aromatic and chain organic substances are decomposed and reduced in molecular weight, and even if organic substances are harmful, they are reduced in toxicity or made harmless. In other words, cavitation generated by the irradiation of ultrasonic waves generates countless air bubbles, and when these air bubbles are destroyed and disappear, a high pressure of several hundred to several thousand atmospheres is instantaneously generated, which is generated in the wastewater or slurry-like material. Acts strongly on water present in water, and the frequency of this action is proportional to the frequency of the ultrasonic waves. At the same time, highly reactive radicals are generated from the water, and strongly decompose organic substances in wastewater or slurries based on water. You do it.

As a result, according to the present invention, the organic matter in the wastewater or slurry is effectively decomposed, and the poisoning or harmlessness is reduced without requiring a large-scale combustion facility or pressure-resistant facility and a large treatment cost. It was possible to provide a possible organic matter processing apparatus.

In the present specification, the term "slurry" refers to not only solid-liquid mixture such as sludge but also fly ash, earth and sand, dust and other dust, and the mixture of liquid and glass, metal, and the like. It is used to mean a state in which a solid and a liquid are mixed, such as a mixture of a ceramic piece and a liquid.

It is preferable that the ultrasonic wave radiating means is arranged in the storage tank and oscillates a vibration frequency of 20 kHz to 2 MHz.

[0012] According to this configuration, the strong cavitation decomposing action acts on the organic matter with respect to the sewage or slurry-like substance stored in the storage tank, and the harmful organic substance is reliably reduced in a relatively short time. Or harmless. still,
If the vibration frequency is less than 20 kHz, the decomposition effect is weak, which is not preferable. If the vibration frequency exceeds 2 MHz, cavitation hardly occurs.

More preferably, the frequency is not less than 20 kHz and 500
Irradiation at a vibration frequency of less than kHz, most preferably at a vibration frequency of 50 to 400 kHz. In this way, the organic matter in the wastewater or slurry can be more efficiently decomposed.

It is preferable that the stirring means is one or both of an impeller type stirrer and a gas introduction from the outside of the storage tank.

According to this structure, even if heavy solids are mixed in the wastewater or slurry, the solids are allowed to float without stopping at the bottom of the storage tank, and the organic substances adhering to the solids are lifted. Can be exposed to irradiation by ultrasonic irradiation means, and decomposition can be made effective, which is convenient. The impeller-type stirrer and the introduction of gas from the outside of the storage tank may be appropriately selected and used depending on the amount of the object to be treated, the type and amount of the existing organic substance, and the like.

The gas introduced from outside the storage tank is air,
It is preferably any of oxygen, nitrogen, argon, carbon dioxide or a mixture thereof.

According to this configuration, the decomposition can be appropriately selected in accordance with the type of the organic substance contained in the wastewater or slurry-like substance, and the decomposition can be performed more efficiently, which is convenient. When introducing air, there is an economic advantage, and when introducing oxygen, an oxidizing atmosphere can be formed,
When introducing nitrogen, argon and carbon dioxide, a non-oxidizing atmosphere can be formed, and each can be appropriately selected and used depending on the object to be treated in order to increase the decomposition efficiency.

It is preferable that the storage tank is of a sealed type, and a gas component generated from the storage tank during the decomposition treatment of the organic matter contained in the sewage or slurry is sent to a gas treatment device.

According to this structure, when decomposing the organic matter in the sewage or slurry-like substance, even if a harmful gas is generated, the harmful gas does not inadvertently escape to the outside. Even when the composition, such as the type of the organic substance therein, is unknown, the decomposition treatment can be carried out with ease, which is convenient.

Further, the characteristic structure of the organic matter treatment method according to the present invention is that a wastewater or slurry containing organic matter is stored in a storage tank, and the wastewater or slurry contained in the storage tank is stirred while the wastewater or slurry is stirred. Alternatively, it is to irradiate the slurry with ultrasonic waves.

According to this configuration, the cavitation generated by the ultrasonic irradiation acts strongly and effectively on the decomposition of the organic matter by the cooperative action with the stirring action, so that large-scale combustion equipment, pressure-resistant equipment, etc. It is possible to provide an organic substance treatment method capable of effectively decomposing organic substances in sewage or slurry-like substances and reducing the toxicity or detoxification without requiring the treatment cost.

[0022]

Embodiments of the present invention will be described in detail with reference to the drawings.

[First Embodiment] FIG. 1 shows a schematic overall configuration of a processing apparatus showing a first embodiment of an organic substance processing apparatus according to the present invention. This treatment device includes a storage tank 1 for storing wastewater or slurry-like waste containing organic matter,
A pipe 3 provided with a pump 2 for carrying wastewater or slurry-like waste into the storage tank 1 is connected. An ultrasonic vibrator 4, which is an ultrasonic irradiation means, is disposed below the inside of the storage tank 1, and mainly emits powerful ultrasonic waves to harmful organic substances contained in sewage or slurry-like waste. A chain portion forming the skeleton of an organic substance is divided and decomposed to be converted into a compound having a lower molecular weight, and harmful organic substances are reduced in toxicity or made harmless. The ultrasonic vibrator 4 is connected to a high-frequency oscillator (not shown), and a control device for controlling the oscillation intensity and frequency of the ultrasonic vibrator 4 is connected to the high-frequency oscillator.

In order to enhance the effect of the ultrasonic vibrator 4, an impeller-type stirrer 5, which is a stirring means for stirring sewage or slurry-like waste in the storage tank 1, is provided.
It is strongly stirred by a motor (not shown) outside the storage tank 1. A plurality of the stirrers 5 may be charged.

Further, air is introduced into the storage tank 1 from the outside through another pipe 6 by an air pump 7 to further promote the stirring. The impeller-type stirrer 5 and the introduction of air from outside constitute stirring means.
However, depending on the internal volume of the storage tank 1 and the type and amount of waste, any one of these stirring means may be used. In addition, air may be introduced by arranging the pipe 6 at a plurality of locations in the storage tank 1, or may be introduced from the bottom position or the side position of the storage tank 1.

The sewage or slurry waste which has been sufficiently stirred and decomposed to reduce poisoning or detoxification is discharged out of the storage tank 1 through a discharge pipe 9 from a discharge port 9a by a discharge pump 8. As described above, the present organic matter treatment apparatus continuously feeds wastewater or slurry-like waste into the storage tank 1,
It can be discharged outside the storage tank 1 while decomposing,
A large amount of waste can be processed. In addition, if a valve is provided in the middle of the pipe 3 and the discharge pipe 9 to control the input or discharge of the wastewater or slurry flowing through these pipes in accordance with the throughput, the operation becomes easier. convenient.

[Second Embodiment] FIG. 2 shows the configuration of an organic substance processing apparatus according to this embodiment. In FIG. 2, members having the same functions as those in the configuration shown in FIG. 1 are given the same reference numerals as those shown in FIG. This organic matter treatment apparatus differs from the apparatus according to the first embodiment described above in that the storage tank 1
A specific gas other than air, such as oxygen, nitrogen, argon, or carbon dioxide, is introduced as a gas to be introduced into the high-pressure vessel 10.
Through the pipe 16. In this case, a gas suitable for promoting the decomposition can be selectively introduced depending on the type and amount of the organic matter in the wastewater or slurry waste, so that the decomposition treatment can be performed more efficiently. When the gas is supplied from the high-pressure vessel 10 through the pipe 16, a flow meter or a valve is attached to the tank 1.
It is preferable that the amount of gas introduced into the inside can be appropriately controlled.

[Third Embodiment] FIG. 3 shows the configuration of an organic substance processing apparatus according to this embodiment. In FIG. 3, members having the same functions as those shown in FIGS.
The same figure numbers as those shown in FIG. This organic matter processing apparatus is different from the apparatuses according to the first and second embodiments described above, in that the entire storage tank 11 is of a sealed type, and the storage tank 1 is processed during processing.
1 is provided with a device for taking out the gas generated from 1 and processing it separately. That is, the ceiling member 12 is installed on the upper part of the storage tank 11 so that the gas component generated from the storage tank 11 is discharged from the gas inlet 13 formed in the ceiling member 12, and is connected to the storage tank 11 via the pipe. The gas is fed to a combustion device 14 which is a gas processing device, is subjected to a combustion process, or is processed by an appropriate gas processing device, and harmless gas is released to the atmosphere through a chimney 15 or the like.

By doing so, the storage tank 11 during the decomposition process
Therefore, even if a harmful gas is generated during the treatment, the harmful gas is burned and decomposed by the separately provided combustion device 14 to be reduced in toxicity or detoxified, which is convenient. Moreover, since harmful organic substances are treated in the storage tank 11, the capacity of the combustion device 14 can be small, and there is no need to use a large-scale combustion facility. Of course, another gas processing device may be connected and arranged instead of the combustion device 14. In FIG. 3, reference numerals 18 and 19 denote valves for controlling the amount of wastewater or slurry flowing through the pipes 3 and 9, and reference numeral 20 denotes a flow rate of gas generated from the storage tank 11. Reference numeral 21 denotes a valve for adjusting the amount of gas supplied from the high-pressure container 10 to the storage tank 11. Further, an air pump for sending air may be provided instead of the cylinder 10.

[Fourth Embodiment] FIG. 4 shows the configuration of an organic substance processing apparatus according to another embodiment. This organic matter processing apparatus is a sealed type similar to the apparatus according to the above-described third embodiment, but different from the apparatus according to the third embodiment,
It is configured to circulate the air introduced into the storage tank 11. That is, the air in the storage tank 11 is taken out from the gas suction port 13 formed in the ceiling member 12, and the taken-out air is returned to the storage tank 1 via the pipe 16 by the circulation pump 22.
It blows out into one. Thus, the same stirring effect as in the case of the first embodiment can be obtained. By providing a fresh air inlet in the middle of this circulation path, the circulation air can be appropriately updated. Furthermore, by introducing another gas such as argon into the storage tank 11 before and after introducing the wastewater or slurry-like material into the storage tank 11, the argon or the like can be circulated instead of air. It should be noted that FIG.
This is a valve for adjusting the amount of air taken out of the inside.

[Fifth Embodiment] FIG. 5 shows the configuration of an organic substance processing apparatus according to another embodiment. This organic matter processing apparatus is a sealed type similar to the apparatus according to the above-described fourth embodiment, and has a similar device configuration. However, unlike the apparatus according to the fourth embodiment, the ultrasonic vibrator 4 has a storage tank. 11
The ultrasonic vibrator 4 is located inside the storage tank.
The ultrasonic transmission device 17 such as a horn extended from the storage tank 1
1 is inserted through the wall. Of course, the contact portion between the ultrasonic transmission device 17 and the wall of the storage tank 11 is sealed by a gasket or the like so that the liquid component does not leak from the inside of the storage tank.

Even with such a configuration, a large vibration amplitude can be obtained from the tip of the ultrasonic transmission device 17, and the energy required for decomposing the organic matter is emitted. According to this configuration,
In particular, when performing maintenance and inspection or repair of the ultrasonic vibrator, the work is easy and convenient. Further, a plurality of such ultrasonic transducers 4 may be arranged on the side wall of the storage tank 11.

[Further Another Embodiment] (1) The organic matter treatment apparatus of the above embodiment may be used alone, but when a plurality of the organic matter treatment apparatuses are used in parallel, a large amount of waste can be treated and the treatment efficiency is increased. convenient.

(2) In the above embodiment, an example was shown in which harmful organic substances in sewage or slurry waste were treated. However, the organic substance treatment apparatus of the present invention not only treats waste, but also processes It can be applied to organic matter decomposition treatment of sewage or slurry, such as intermediate products and final products, and can be widely used to decompose organic matter in sewage or slurry without being limited to harmful organic matter. .

(3) In the above-described embodiment, an example in which the present organic matter treatment apparatus is used as a continuous treatment method has been described. However, a fixed amount of wastewater or slurry-like matter may be treated as a batch method for a predetermined time. Can be repeated.

[Brief description of the drawings]

FIG. 1 is a schematic overall configuration diagram of a decomposition processing apparatus according to a first embodiment of the present invention.

FIG. 2 is a schematic overall configuration diagram of a decomposition processing apparatus according to a second embodiment of the present invention.

FIG. 3 is a schematic overall configuration diagram of a decomposition processing apparatus according to a third embodiment of the present invention.

FIG. 4 is a schematic overall configuration diagram of a decomposition processing apparatus according to a fourth embodiment of the present invention.

FIG. 5 is a schematic overall configuration diagram of a decomposition processing apparatus according to a fifth embodiment of the present invention.

[Explanation of symbols]

 1,11 Storage tank 4 Ultrasonic irradiation means 5 Stirring means 14 Gas treatment device

Claims (6)

[Claims] 1. A storage tank capable of storing wastewater or slurry containing organic matter, a stirring means for stirring the wastewater or slurry stored in the storage tank, and irradiating ultrasonic waves to the wastewater or slurry. An organic substance processing apparatus comprising: 2. The organic substance processing apparatus according to claim 1, wherein the ultrasonic irradiation unit is disposed in the storage tank and oscillates at a vibration frequency of 20 kHz to 2 MHz. 3. The organic substance processing apparatus according to claim 1, wherein the stirring means is one or both of an impeller type stirrer and a gas introduction from the outside of the storage tank. 4. The organic matter treating apparatus according to claim 3, wherein the gas introduced from the outside of the storage tank is any one of air, oxygen, nitrogen, argon, and carbon dioxide or a mixture thereof. 5. The gas treatment device according to claim 1, wherein the storage tank is of a sealed type, and a gas component generated from the storage tank during the decomposition treatment of the organic matter contained in the sewage or slurry is sent to a gas treatment device. Any one of the organic substance processing apparatuses. 6. An organic substance treatment in which sewage or slurry containing organic matter is stored in a storage tank, and the sewage or slurry in the storage tank is irradiated with ultrasonic waves while stirring the sewage or slurry. Method.