JPH09229324A - Waste treatment device and operation method for the device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate a problem even when the exhaust gas is discharged into the atmosphere, and achieve the incineration, deodorization, and the harmless treatment of liquid waste by a method wherein the liquid waste and water are introduced to at least one of a discharging device, a thermally decomposed gas passage, a fuel melting furnace and an exhaust gas passage. SOLUTION: A liquid waste (g) in a liquid waste container 15 is drawn by a pump 17, and introduced from a nozzle being provided on the internal wall of a combustion melting furnace 3 through a passage L5. The liquid waste being introduced to the combustion melting furnace 3, is evaporated by the total amount and becomes a gas. Also, the residue in the liquid waste which has not been removed by a strainer 16 also enters the combustion melting furnace 3. These gas and residue are heated at a high temperature and oxidized in the combustion melting furnace 3 of which the temperature is normally approx. 1300 deg.C. Therefore, combustible components being mixed in the liquid waste are incinerated, and malodor substance, harmful substance and causal organism are made harmless in an exhaust gas G2, or have been changed into substances which can be easily removed by an exhaust gas purifying device, and there is no problem even when being discharged into the atmosphere.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention heats general waste and industrial waste to generate a pyrolysis gas and a pyrolysis residue, and burns combustible components containing ash in the pyrolysis residue to the above-mentioned heat treatment. In connection with a waste treatment device that burns in a combustion melting furnace together with decomposed gas to melt ash, especially a waste treatment device that properly processes liquid waste and controls combustion melting temperature appropriately, and discards The present invention relates to a method of operating a material processing device.

[0002]

2. Description of the Related Art In a general so-called refuse incinerator,
When treating the liquid waste together with the solid waste, the liquid waste is generally introduced into an incinerator and incinerated, or treated in a separately provided waste liquid purification facility.
Here, liquid waste refers to outflow sewage from waste that accumulates in solid waste storage rooms such as household waste, domestic wastewater and other sewage, so-called chemical waste liquid of industrial waste, flammable waste liquid such as waste oil, etc. Including all.

On the other hand, for example, the former West German Patent Publication No. 41072000.6 and Japanese Patent Publication No. 6-56253.
In the waste treatment equipment as proposed in Japanese Patent No.
The waste is heated in the pyrolysis reactor to be pyrolyzed to produce a pyrolysis gas and a pyrolysis residue, and the pyrolysis gas and a combustible component containing ash in the pyrolysis residue are burned in a combustion melting furnace. It is configured to be burnt at. In this device, incineration ash generated at the same time as incineration can be melted into slag in the same furnace, and the slag can be reused. Therefore, attention has recently been gathered from various fields. Hereinafter, this type of apparatus is referred to as a pyrolysis / combustion melting apparatus.

Of the publications listed above, the latter does not describe the treatment of liquid waste. On the other hand, in the former case, a claim relating to an apparatus and a method for introducing liquid waste into a thermal decomposition reactor and detoxifying it is described. In addition, when introducing "liquid matter" including liquid waste and clean water to somewhere in the thermal decomposition / combustion melting apparatus, the system temperature, pressure, etc. may naturally change. There is no description about it.

[0005]

However, as proposed in the former West German Patent Publication No. 41072000.6, when the liquid waste is put in the pyrolysis reactor, the liquid waste is completely evaporated. In addition, an additional amount of heat for heating the evaporative gas to the temperature required for the thermal decomposition of waste (usually about 300 to 600 ° C, preferably about 450 ° C) is supplied to the thermal decomposition reactor. There must be. In the case of a large amount of liquid waste, this extra heat supply amount becomes extremely large, and at a bad time, it may exceed the heat supply capacity of the process. On the other hand, designing a process for a situation where a large amount of liquid waste is present poses a problem in terms of equipment cost.

Also, when applying the method of introducing liquid waste into the incinerator and incinerating it, as in the case of the above-mentioned general so-called garbage incinerator, when applying it to the above-mentioned pyrolysis / combustion melting apparatus, consideration is given. There are some things to do: For example, first, a general refuse incinerator and a combustion melting furnace in the above-mentioned thermal decomposition / combustion melting apparatus are not the same equipment. That is, the latter is characterized in that not the waste itself but the thermal decomposition product thereof is burned, and at the same time, the ash is melted into slag. The method of introducing and treating liquid waste into such a "combustion and melting furnace" has never been proposed. Also, in a general garbage incinerator,
As long as it is not necessary to melt the ash into molten slag, a large amount of liquid waste may be introduced and treated to raise or lower the temperature in the furnace without causing a serious problem. However, in the combustion melting furnace in the above-mentioned thermal decomposition / combustion melting apparatus, it is necessary to carry out the molten slag formation process of the ash in the furnace at a high temperature, and therefore, by introducing liquid waste, etc. It is not possible to raise or lower the temperature. Therefore, it is understood that it is necessary to determine the liquid waste introduction part and the introduction method according to a clear standard different from the conventional general waste incinerator. In addition to the above, it goes without saying that the method of treating the liquid waste by the separately provided waste liquid purification facility increases the facility cost. In addition, regardless of whether or not liquid waste is treated, the temperature control of the process including the inside of the combustion melting furnace is performed by using "liquid substances" that include clean water such as industrial water, tap water, rainwater, etc. Could be done. But,
So far there has been no guidance on how to do it.

An object of the present invention is that it is not necessary to separately provide a waste liquid purification facility and the like, and the facility cost as described above is not required.
In addition, the present invention provides a waste treatment apparatus capable of treating liquid waste and / or appropriately controlling the combustion melting temperature while stably performing the ash content in the waste until it becomes molten slag, and a method for operating the waste treatment apparatus. Especially.

[0008]

In order to achieve the above object, the present invention provides a thermal decomposition method in which waste is heated and thermally decomposed to generate a thermal decomposition gas and a thermal decomposition residue mainly composed of non-volatile components. A reactor, a discharge device that is directly connected to the thermal decomposition reactor and separates and discharges the thermal decomposition gas and the thermal decomposition residue, and a thermal decomposition residue discharged from the exhaust device that contains ash A separation device for separating into a component and a non-combustible component, taking in a combustible component containing ash content from the pyrolysis gas and the separation device from the discharge device, and combusting the combustible component containing the pyrolysis gas and ash content In a waste treatment device provided with a combustion melting furnace for melting treatment, liquid waste other than the waste and / or water is passed from the discharging device and the discharging device to the combustion melting furnace and the pyrolysis gas flows. Pyrolysis gas flow path, front A liquid waste and / or water introducing means to be introduced into at least one of the combustion melting furnace and the exhaust gas flow path which is directly connected to the combustion melting furnace and through which the exhaust gas from the combustion melting furnace flows is provided. . The term "water" as used herein means relatively clean water such as industrial water, tap water, tap water, and rainwater.

If the above-mentioned liquid waste and / or water introducing means is provided, the liquid waste and / or water or gas and residue after evaporation of the liquid waste, discharge device, pyrolysis gas flow path, combustion melting furnace and exhaust gas. In the flow path, the liquid waste is heated to a high temperature and is oxidized (even when introduced into the pyrolysis gas flow path, it is subjected to sufficient oxidation processing when it is transferred to the combustion melting furnace). For this reason, the combustible components mixed in the liquid waste are incinerated, and the malodorous substances, harmful substances and pathogens are rendered harmless or can be easily removed by an exhaust gas purifying device usually provided downstream of the exhaust gas passage. Change into a substance.

Further, when the liquid waste and / or water is introduced into at least one of the discharge device, the pyrolysis gas flow furnace, and the combustion melting furnace, the temperature in the combustion melting furnace is fluctuate. By utilizing this, the temperature in the combustion melting furnace can be controlled.

Here, the combustible component in the liquid waste raises the temperature in the combustion-melting furnace by its combustion, and the non-combustible component and water absorb the heat in the process of vaporization and temperature rise, thereby lowering the temperature. Therefore, the temperature in the combustion melting furnace can be controlled by adjusting the respective introduction flow rates. That is, when the liquid waste to be treated has a large calorific value as a whole (for example, a low calorific value of about 3000 kcal / kg or more), it is possible to raise the temperature in the combustion melting furnace by introducing it as described above. If a liquid waste having a small calorific value (for example, a lower calorific value of 1000 kcal / kg or less) is introduced, the temperature inside the combustion melting furnace can be further lowered. Even when water is introduced, the temperature in the combustion melting furnace naturally drops. At this time, the discharge device, the pyrolysis gas flow path, and the amount of liquid waste and / or water to be introduced into the combustion melting furnace are such that the temperature inside the combustion melting furnace is about the temperature (about 1000 ℃ or more, preferably about 1200-1
500 ° C.), and if necessary, the proportion of combustible components may be adjusted by blending a plurality of liquid wastes and water.

In the case of the above means, unlike the method of introducing the liquid waste and / or water into the thermal decomposition reactor, the temperature required for the thermal decomposition of the waste (about 300 to 600).
In order to heat the waste to ℃, usually about 450 ℃), it is not necessary to increase the amount of heat supplied to the pyrolysis reactor. This is of course because liquid waste and / or water is introduced into the system at a location downstream of the pyrolysis reactor.

When introducing liquid waste and / or water into the combustion melting furnace, one or a plurality of nozzles are connected to the inner wall of the combustion melting furnace so that the temperature distribution in the furnace does not adversely affect the original combustion melting process. To control the flow rate of introduction.
That is, a local increase in pressure and a local decrease in temperature due to evaporation of liquid waste and / or water are avoided, and stable combustion and melting are continued.

Although liquid waste and / or water may be directly introduced into the exhaust gas passage, the liquid waste and / or water may be introduced into a buffer provided on the exhaust gas passage. Water may be introduced. In any case, when the liquid waste contains a large amount of combustible components, the introduction part needs a fireproof structure that can withstand the combustion. By introducing the liquid waste and / or water into the buffer in this way, it is possible to mitigate the rapid increase in local pressure at the time of introduction, and to sufficiently mix the liquid waste and / or water with the exhaust gas, and to mix the mixed gas. It is possible to hold at high temperature for a sufficient time,
It can completely detoxify odorous substances, harmful substances and pathogens contained in liquid waste. As the buffer, use the space of equipment installed in the exhaust gas flow path of the thermal decomposition / combustion melting apparatus (for example, a waste heat boiler, a radiant cooling tower (which may be provided before the waste heat boiler), etc.) You can also

Liquid waste and / or
Alternatively, when water is introduced, it is effective to introduce water into the exhaust gas flow passage at a temperature of at least about 500 ° C. or higher, and when it contains a large amount of combustible components, at a temperature of about 800 ° C. or higher. There is a possibility that incineration and detoxification will not be sufficiently performed at a temperature lower than this. Further, by introducing liquid waste and / or water having a small amount of combustible components into the exhaust gas passage, it is possible to cool the combustion exhaust gas to a temperature suitable for entering the waste heat boiler.

Further, according to the present invention, a thermal decomposition reactor for heating and thermally decomposing waste to generate a thermal decomposition gas and a thermal decomposition residue mainly composed of non-volatile components, and a thermal decomposition reactor directly connected to the thermal decomposition reactor. And a separation device for separating and discharging the pyrolysis gas and the pyrolysis residue, and a separation device for separating the pyrolysis residue discharged from the discharge device into a combustible component containing ash and an incombustible component. And a combustion-melting furnace that takes in the pyrolyzed gas from the discharge device and the combustible component containing ash from the separation device, and performs a combustion melting process on the combustible component containing pyrolytic gas and ash. In the treatment device, liquid wastes and / or water other than the wastes, the pyrolysis reactor, the discharge device, a pyrolysis gas flow path through which the pyrolysis gas flows from the discharge device to the combustion melting furnace, Each machine of the combustion melting furnace Liquid waste and / or water introducing means to be introduced into an exhaust gas flow path that is directly connected to the combustion melting furnace and the exhaust gas from the combustion melting furnace flows, and the furnace temperature of the combustion melting furnace. Based on the detection means for detecting and the detection result from the detection means, the liquid waste and / or water introduction means adjusts the amount of the liquid waste and / or water introduced into each device, and the combustion melting A control means for controlling the temperature inside the furnace is provided. (Here, even if liquid waste is introduced into the thermal decomposition reactor, the total amount of liquid waste is stored only in the thermal decomposition reactor. It should be noted that instead of introducing it, a part of the liquid waste is always introduced into the exhaust gas flow path, and the amount of introduction of each liquid waste is controlled).

With the above construction, the liquid waste is introduced into the combustion melting furnace through the pyrolysis reactor, the discharge device, the pyrolysis gas flow path or directly while detecting the temperature in the combustion melting furnace. The amount of water and the amount of water can be adjusted, and the temperature inside the combustion melting furnace can be maintained at an appropriate temperature. That is, the combustion melting furnace may be in an abnormally high or low temperature state due to fluctuations in the quality of dust, etc. even during normal operation.In such a case, the thermal decomposition reactor,
By increasing or decreasing the amount of liquid waste and / or water introduced into the discharge device, the pyrolysis gas flow path or the combustion melting furnace, the temperature inside the combustion melting furnace can be changed to an appropriate value. Moreover, the temperature inside the combustion melting furnace can be kept constant by finely adjusting the amount of liquid waste and / or water introduced. In addition, thermal decomposition reactor, discharge device,
When the amount of liquid waste introduced into the pyrolysis gas passage or the combustion melting furnace is increased, the amount of remaining liquid waste introduced into the exhaust gas passage decreases conversely.

For the pyrolysis reactor, from a waste inlet provided in the pyrolysis reactor or from one or more nozzles attached to the pyrolysis reactor,
Each is configured to introduce liquid waste and / or water. At this time, the temperature of the liquid waste and / or water or the gas generated by the evaporation and the residue are about 300 to 600 ° C.
It is most surely incinerated and detoxified in order to pass through both the thermal decomposition reactor and the combustion melting furnace whose temperature is about 1000 ° C or higher. In this case, if the liquid waste and / or water is introduced from the waste input port, it is not necessary to provide a separate nozzle, but the liquid waste and / or water is introduced unevenly only in the vicinity of the input port, and only that part is introduced. In some cases, the temperature may be extremely lowered. To avoid this, one or more nozzles may be placed at appropriate locations in the pyrolysis reactor.

However, liquid waste and / or
Alternatively, when introducing water, it is necessary to keep the amount introduced within the range of the heat supply capacity to the thermal decomposition reactor in this process. That is, the amount represented by the following formula or less may be considered as the amount of liquid waste and / or water that can be introduced into the thermal decomposition reactor. (Maximum liquid waste and / or = ((maximum possible heat supply amount)-(Liquid waste and / or water introduction amount) is the heat supply amount without water)) ÷ [{( Required temperature for thermal decomposition)-(Temperature of liquid waste and / or water)} x (Gas generated by evaporation of liquid waste and / or water from the temperature of liquid waste and / or water to the required temperature for thermal decomposition Average heat capacity of liquid waste + and + (average latent heat of vaporization of liquid waste and / or water at the temperature of liquid waste and / or water)] If the amount of liquid waste and / or water exceeds the value in the above formula, excess It is necessary to introduce a sufficient amount of liquid waste and / or water into any of the discharge device, the pyrolysis gas passage, the combustion melting furnace, or the exhaust gas passage.

Further, the amount of liquid waste and water introduced into the pyrolysis reactor, the discharge device, the pyrolysis gas flow path, and the combustion melting furnace are required to change the temperature inside the combustion melting furnace to form molten slag of ash. Temperature (about 1000 ° C or higher, preferably about 120 ° C)
Needless to say, it is necessary to control the amount so that it can be maintained at 0 to 1500 ° C. At this time, the remaining liquid waste is introduced into a high temperature part of the exhaust gas flow path (at least 500 ° C. or higher, approximately 800 ° C. or higher in the case of containing a large amount of combustible components) or a buffer provided in the high temperature part of the exhaust gas flow path. , Incinerate / detoxify. When introducing a liquid waste containing a large amount of combustible components, the introduction part needs to have a fire resistant structure that can withstand the combustion.

[0021]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail with reference to the drawings. Here, unless otherwise specified, an example will be described in which a liquid waste does not cause a problem in handling even if mixed with water (for example, precipitation by reaction or heat generation). (First Embodiment) FIG. 1 shows the overall structure of a waste treatment apparatus according to a first embodiment of the present invention. In the figure, reference numeral 1 denotes a waste material inlet attached to one end of the thermal decomposition reactor 2, which is a waste material a containing combustible materials such as municipal waste.
Is charged into the thermal decomposition reactor 2 from the waste charging port 1.
Generally, the thermal decomposition reactor 2 is a horizontal rotary drum,
The inside is kept in a low oxygen atmosphere by a sealing mechanism (not shown). Further, heating air heated by a heat exchanger (not shown) arranged on the downstream side of the combustion melting furnace 3 is supplied to the thermal decomposition reactor 2 through an air flow path L1.
With this supplied heated air, the inside of the thermal decomposition reactor 2 is
It is heated to 0 ° C to 600 ° C, usually about 450 ° C. The waste a introduced into the thermal decomposition reactor 2 is heated by heated air and thermally decomposed to generate a thermal decomposition gas G1 and a mainly non-volatile thermal decomposition residue b. The pyrolysis gas G1 and the pyrolysis residue b are separated by the discharge device 4 directly connected to the other end of the pyrolysis reactor 2, and the pyrolysis gas G
1 is a burner 5 of the combustion melting furnace 3 through the pyrolysis gas flow path L2
Is supplied to.

On the other hand, the pyrolysis residue b is introduced into the separation device 6, where the relatively coarse-grained non-combustible component c such as metal or pottery is used.
And the fine combustible component d containing ash, and the combustible component d is supplied to the burner 5 of the combustion melting furnace 3 via the flow path L3. The combustible component d sent to the burner 5 is burnt in the combustion melting furnace 3 together with the pyrolysis gas G1 by the air e sent from the blower 7. Inside the combustion melting furnace 3, the combustible component d is about 1000 ° C. or higher, preferably 1
Combustion is performed at a high temperature of 200 ° C., usually about 1300 ° C., and the combustion ash derived from the ash in the combustible component d is melted and becomes molten slag f, which falls into the water tank 8 and solidifies. Further, the combustion exhaust gas G2 generated in the combustion melting furnace 3 flows through the exhaust gas passage L4, and heat is recovered by the heat exchanger (not shown) and the waste heat boiler 9 arranged on the downstream side of the combustion melting furnace 3. Further, after the harmful substances are removed by the dust collector 10 and the exhaust gas purification device 11 by the dust collector 10, the air is discharged from the chimney 13 into the atmosphere by the blower 12. In addition, 14 in the figure is a generator operated by a steam turbine.

Further, the liquid waste container 15 and the combustion melting furnace 3
A liquid waste flow path L5 having a strainer 16 and a pump 17, and a water flow path L5 ′ that joins the liquid waste flow path L5 are provided between and. This liquid waste flow path L5
And the point that the water flow path L5 ′ is provided is a feature of the present embodiment. With such a configuration, the liquid waste g in the liquid waste container 15 is sucked by the pump 17, and the liquid waste flow path L
It can be introduced into the combustion melting furnace 3 through one or more nozzles (not shown) provided on the inner wall of the combustion melting furnace 3. When the liquid waste g sucked by the pump 17 passes through the strainer 16, the residue in the liquid waste is removed, and the removed residue is put into the waste input port 1.

All the liquid waste introduced into the combustion melting furnace 3 is vaporized into gas. In addition, there remains a residue that cannot be completely removed by the strainer 16 in the liquid waste, which also enters the combustion melting furnace 3. These gases and residues are heated to a high temperature and oxidized in the combustion melting furnace 3 whose temperature is usually about 1300 ° C. For this reason, the combustible components mixed in the liquid waste are incinerated, and the malodorous substances, harmful substances and pathogens are detoxified in the exhaust gas G2, or the exhaust gas purifying device (usually (Provided on the downstream side of the flow path L4) is changed to a substance that can be easily removed, and the exhaust gas G2 is converted into the chimney 12
There is no problem if it is released into the atmosphere from. Thus, the deodorizing / detoxifying process of the liquid waste can be executed. Further, an appropriate amount of water h (work water, tap water, tap water, etc.) is supplied from the water flow path L5 ′, and is introduced into the combustion melting furnace 3 through the liquid waste flow path L5 together with the liquid waste g. In the above, the non-combustible component and the water h in the liquid waste g moderate the temperature rise in the combustion melting furnace 3 due to the combustion of the pyrolysis gas G1, the combustible component d and the combustible component in the liquid waste g, and are appropriate. It is kept at a temperature (up to 1300 ° C). In the present embodiment, the liquid waste flow path L5, the strainer 16 and the pump 17 provided on the liquid waste flow path L5, and the water flow path L5 ′ constitute liquid waste and water introduction means. There is.

(Second Embodiment) FIG. 2 shows a second embodiment of the present invention.
The embodiment of is shown. The feature of this embodiment is that a liquid waste flow path L6 having a strainer 16 and a pump 17 between the liquid waste container 15 and the pyrolysis gas flow path L2,
And the water flow path L5 ′ that joins the liquid waste flow path L6 is provided, and the liquid waste g accumulated in the liquid waste container 15 is sucked by the pump 17 and is supplied with the water h introduced from the water flow path L5 ′. It is configured to be introduced into the pyrolysis gas flow path L2 via the liquid waste flow path L6.

Even with this structure, the same effect as that of the first embodiment can be obtained. That is, the liquid waste g and the water h introduced into the pyrolysis gas flow path L2 flow into the combustion melting furnace 3 and are heated at a high temperature in the combustion melting furnace 3 to be oxidized, so that the combustible components are incinerated. , Odorous substances, harmful substances and pathogens are detoxified or removed, and exhaust gas G
There is no problem if 2 is released from the chimney 13 into the atmosphere. Further, the temperature in the combustion melting furnace 3 is controlled by introducing the liquid waste g and the water h.

According to the present embodiment, as in the first embodiment, since the liquid waste is not introduced into the thermal decomposition reactor 2, it is possible to prevent the temperature inside the thermal decomposition reactor 2 from decreasing. . As a result, it is not necessary to raise the temperature of the heated air to the pyrolysis reactor 2 or increase the supply amount of the heated air, and it is possible to avoid an increase in the size of the entire system. In the present embodiment, the liquid waste flow path L6 and the strainer 16 and the pump 1 provided on the liquid waste flow path L6 are provided.
7 Further, the water flow path L5 ′ constitutes a liquid waste and water introducing means.

(Third Embodiment) FIG. 3 shows a third embodiment of the present invention.
The embodiment of is shown. The feature of the present embodiment is that a liquid waste passage L7 having a strainer 16 and a pump 17 and a water passage L5 ′ joining the liquid waste passage L7 are provided between the liquid waste container 15 and the exhaust gas passage L4. Since it is provided, the liquid waste g accumulated in the liquid waste container 15 is sucked by the pump 17, and the water h introduced from the water flow path L5 ′ is supplied.
At the same time, it is configured to be introduced into the exhaust gas passage L4 through the liquid waste passage L7.

In order to heat the liquid waste g introduced into the exhaust gas passage L4 to a high temperature, the temperature of the exhaust gas flowing through the exhaust gas passage L4 must be 500 ° C. or higher at the lowest. Therefore, the liquid waste flow path L7 is connected to a portion of the exhaust gas flow path L4 where the temperature of the exhaust gas flowing inside is 500 ° C. or higher. When the liquid waste g contains a large amount of combustible components, the liquid waste g needs to be connected to a portion of the exhaust gas passage L4 through which the exhaust gas at a temperature of at least 800 ° C flows. In this case, the connection part has a fireproof structure that can withstand combustion. Then, the liquid waste g introduced into the exhaust gas flow path L4 is heated to a high temperature by the waste heat of the exhaust gas and subjected to an oxidation treatment to be incinerated / detoxified or removed. This point is the same as in the first and second embodiments described above.

In the present embodiment, since liquid waste and water are not introduced into the combustion melting furnace 3 at all, the liquid waste and water in the combustion melting furnace 3 evaporate, the temperature of the generated gas rises, or the liquid waste There is no change in furnace temperature due to combustion of combustible components. For this reason, the temperature (about 1000 ° C. or higher, preferably 12 ° C. or higher, preferably 12 ° C.) necessary for forming slag in the combustion melting furnace 3 without supplying extra heat or cooling the combustion melting furnace 3
The temperature can be maintained at 00 ° C. or higher, usually about 1300 ° C.). In addition, in the present embodiment, the liquid waste flow path L7, the strainer 16 and the pump 17 provided on the liquid waste flow path L7, and the water flow path L5 ′ constitute the liquid waste and water introducing means. There is.

(Fourth Embodiment) FIG. 4 shows a fourth embodiment of the present invention.
The embodiment of is shown. The feature of the present embodiment is that the buffer container 20 is provided in the middle of the exhaust gas passage L4 and the liquid waste passage L7 described in the third embodiment is connected to the buffer container 20.

When the liquid waste is introduced into the buffer container 20 as described above, the liquid waste and the exhaust gas G2 are uniformly mixed, and this mixed gas can be kept at a high temperature for a sufficient time. There is an effect that the malodorous substance, the harmful substance and the pathogen contained in the liquid waste are made more harmless more surely than when the buffer container 20 is not provided, and the combustible component can be sufficiently incinerated. In the present embodiment, the liquid waste flow path L7, the strainer 16 provided on the liquid waste flow path L7, the pump 17, and the buffer container 20,
Further, the water flow path L5 ′ constitutes a liquid waste and water introducing means. Here, when the liquid waste contains a large amount of combustible components, the buffer container 20 is made to have a fire resistant structure that can withstand the combustion.

(Fifth Embodiment) FIG. 5 shows a fifth embodiment of the present invention.
The embodiment of is shown. In the present embodiment, the strainer 1 is provided between the liquid waste container 15 and the exhaust gas passage L4.
6 and a pump 17, a liquid waste flow path L8 is provided, and further, the liquid waste flow path L8 merges with a water flow path L8 'immediately after the pump 17 wakes, and further after that, a liquid waste flow path L9 and a waste gas flow path L9. Liquid waste flow passages L10 branched before the flow passage L4 are respectively provided. A valve 25 is attached in the middle of the liquid waste flow path L9, a valve 26 is attached in the middle of the liquid waste flow path L10, and a valve 29 is attached in the middle of the water flow path L8 '. Further, a temperature sensor 27 for detecting the temperature inside the furnace is attached to the combustion melting furnace 3. The valves 25, 26, 29 and the temperature sensor 27 are electrically connected to the control device 28.

The pump 17 sucks the liquid waste g from the liquid waste container 15, and the waste input port 1 of the thermal decomposition reactor 2
It is supplied to the combustion melting furnace 3 and the exhaust gas passage L4.
Water h introduced from the water flow path L8 ′ is also supplied to these together with the liquid waste g. On the other hand, the temperature sensor 27 detects the temperature in the furnace of the combustion melting furnace 3 and transmits the detection result to the control device 28. On the other hand, the control device 28 controls the valves 25, 2 based on the detection result from the temperature sensor 27.
The opening adjustments of 6 and 29 are performed.

Even if the combustion and melting furnace 3 is normally operated, it may be in an abnormally high or low temperature state due to fluctuations in the quality of dust. When the temperature inside the combustion melting furnace 3 changes abnormally, the temperature sensor 27 detects this and notifies the control device 28. In the control device 28, the temperature sensor 2
7, the opening degree of the valves 25, 26, 29 is calculated based on the temperature information, and the opening degree of the valves 25, 26, 29 is adjusted based on the calculation result. by this,
The amount of liquid waste and water introduced into the pyrolysis reactor 2 or the combustion melting furnace 3 changes. When the temperature of the combustion melting furnace 3 becomes abnormal, the temperature inside the combustion melting furnace 2 is increased by increasing or decreasing the amount of liquid waste and water introduced into the thermal decomposition reactor 2 or the combustion melting furnace 3. Can be changed to an appropriate value. Here, when the lower heating value after the liquid waste g and the water h are mixed is about 3000 kcal / kg or more, generally, the temperature inside the combustion melting furnace 3 rises due to these supply, and when the temperature is about 1000 kcal / kg or less. Lowers (not significantly changed at 1000 to 3000 kcal / kg). Further, when the amount of the liquid waste introduced into the thermal decomposition reactor 2 or the combustion melting furnace 3 increases, the amount of the remaining liquid waste introduced into the exhaust gas passage L4 decreases conversely. .

In the present embodiment, the liquid waste flow paths L8 to L10, the strainer 16 and the pump 17 provided on the liquid waste flow path L8, and the water flow path L are provided.
8'is a means for introducing liquid waste and water, the temperature sensor 27
Is a detection means, the control device 28, and the liquid waste flow path L.
The valves 25 and 26 provided on the valve L9 and the valve L10, and the valve 29 provided on the water flow path L8 'constitute control means.

In the present embodiment, the liquid waste flow path L
9 and the valve 25, or the liquid waste flow path L10 and the valve 26, the liquid waste introduction means and the control means can be omitted. Further, although not shown, another liquid waste flow path that branches from a portion of the liquid waste flow path L8 that joins the water flow path L8 ′ to a downstream side and reaches the discharge device 4 or the pyrolysis gas flow path L2. The same operation as described above can be performed by arranging another valve in the liquid waste flow path whose opening can be controlled by the control device 28.

In the first to fourth embodiments described above,
An example was given where liquid waste mixed with water did not cause any problems. Therefore, the water flow path L5 'or L8' merges with the liquid waste flow path L5, L6, L7 or L8, whereby the water is mixed with the liquid waste and sent to the respective devices. If any problem occurs when the liquid waste mixes with water, the means for introducing water into each device must be provided separately from the means for introducing liquid waste.
In these examples, when it is not necessary to treat the liquid waste, or when the temperature inside the combustion melting furnace can be controlled without introducing water, the liquid waste introducing means or the water, respectively. It goes without saying that the introduction means of can be omitted.

[0039]

As described above, according to the waste treatment apparatus of the present invention, not only the waste is incinerated but also the ash is stably melted into slag, while the thermal decomposition reactor, the discharge device, the heat generator By introducing the liquid waste into at least one of the decomposition gas flow path, the combustion melting furnace or the exhaust gas flow path, the combustible components contained in the liquid waste are incinerated to remove the malodorous substances, harmful substances and pathogens. Since it can be detoxified or changed to a substance that can be easily removed, there is no problem even if the exhaust gas is emitted into the atmosphere from the chimney, and the incineration, deodorization, and detoxification treatment of the liquid waste can be performed. In addition, there is no need to separately provide a wastewater purification facility for liquid waste treatment, and it is only necessary to add a liquid waste flow path, etc. to existing facilities, so there is no facility cost, and the same type of waste treatment equipment is required. Can be easily applied to. Further, a part of the liquid waste and / or water is introduced into at least one of the pyrolysis reactor, the discharge device, the pyrolysis gas flow path, and the combustion melting furnace, and the remaining liquid waste and / or water is discharged into the exhaust gas stream. By introducing into the passage, the temperature in the combustion melting furnace can be controlled to a temperature suitable for combustion / melting slag.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a waste treatment device according to a first embodiment of the present invention.

FIG. 2 is an overall configuration diagram of a waste treatment device according to a second embodiment of the present invention.

FIG. 3 is an overall configuration diagram of a waste treatment device according to a third embodiment of the present invention.

FIG. 4 is an overall configuration diagram of a waste treatment device according to a fourth embodiment of the present invention.

FIG. 5 is an overall configuration diagram of a waste treatment device according to a fifth embodiment of the present invention.

[Explanation of symbols]

 1 Waste Inlet 2 Pyrolysis Reactor 3 Combustion Melting Furnace 4 Exhaust Device 5 Burner 6 Separation Device 7, 12 Blower 8 Water Tank 9 Waste Heat Boiler 10 Dust Collector 11 Exhaust Gas Purification Device 13 Chimney 14 Generator 15 Liquid Waste Container 16 Strainer 17 Pump 20 Buffer Container 25, 26 Valve 27 Temperature Sensor 28 Control Device L1 Air Flow Path L2 Pyrolysis Gas Flow Path L3 Flow Path L4 Exhaust Gas Flow Path L5-L10 Liquid Waste Flow Path L5 ′, L8 ′ Water Flow Path a Waste b Thermal decomposition residue c Non-combustible component d Combustible component e Air f Molten slag g Liquid waste h Water

Claims (6)

[Claims] 1. A thermal decomposition reactor for heating and thermally decomposing waste to generate a thermal decomposition gas and a thermal decomposition residue mainly composed of non-volatile components; and a thermal decomposition reactor directly connected to the thermal decomposition reactor. A discharge device for separating and discharging the pyrolysis gas and the pyrolysis residue, a separation device for separating the pyrolysis residue discharged from the discharge device into a combustible component containing ash and a non-combustible component, and the discharge In a waste treatment device including a pyrolysis gas from the device and a combustible component containing ash from the separation device, and a combustion melting furnace for performing combustion melting treatment of the combustible component containing ash and pyrolysis gas, Liquid wastes and / or water other than the wastes are introduced into the discharge device, the pyrolysis gas flow path through which the pyrolysis gas flows from the discharge device to the combustion melting furnace, the combustion melting furnace, and the combustion melting furnace. Directly connected to combustion melting furnace The exhaust gas passage which the exhaust gas flows, waste treatment apparatus characterized in that a means for introducing the liquid waste and / or water is introduced to at least one of. 2. The liquid waste and / or water introducing means, for the combustion melting furnace, the liquid waste and / or water is introduced into one or a plurality of nozzles attached to the combustion melting furnace.
Alternatively, the waste treatment device according to claim 1, wherein water is introduced. 3. The liquid waste and / or water introducing means introduces the liquid waste and / or water into a buffer provided on the exhaust gas flow path for the exhaust gas flow path. The waste treatment device according to claim 1. 4. The liquid waste and / or water has a temperature of the exhaust gas flowing inside the exhaust gas passage of about 50.
It is introduced at a location of 0 ° C or higher.
Or the waste treatment device according to 3. 5. A thermal decomposition reactor for heating and thermally decomposing waste to generate a thermal decomposition gas and a thermal decomposition residue mainly composed of non-volatile components, and a thermal decomposition reactor directly connected to the thermal decomposition reactor. A discharge device for separating and discharging the pyrolysis gas and the pyrolysis residue, a separation device for separating the pyrolysis residue discharged from the discharge device into a combustible component containing ash and a non-combustible component, and the discharge In a waste treatment device including a pyrolysis gas from the device and a combustible component containing ash from the separation device, and a combustion melting furnace for performing combustion melting treatment of the combustible component containing ash and pyrolysis gas, Liquid waste other than the waste and / or water, the pyrolysis reactor, the discharge device, a pyrolysis gas flow path from the discharge device to the combustion melting furnace, the pyrolysis gas flows,
At least one of each device of the combustion melting furnace, the liquid waste and / or water introducing means which is directly connected to the combustion melting furnace and is introduced into an exhaust gas passage through which exhaust gas from the combustion melting furnace flows, Based on the detection result from the detection means for detecting the temperature inside the furnace of the combustion melting furnace, the detection means,
Control means for adjusting the amount of liquid waste and / or water introduced into each device by the liquid waste and / or water introducing means and controlling the temperature inside the combustion melting furnace. Characteristic waste treatment equipment. 6. A thermal decomposition reactor for heating and thermally decomposing waste to generate a thermal decomposition gas and a thermal decomposition residue mainly composed of non-volatile components; and a thermal decomposition reactor directly connected to the thermal decomposition reactor. A discharge device for separating and discharging the pyrolysis gas and the pyrolysis residue, a separation device for separating the pyrolysis residue discharged from the discharge device into a combustible component containing ash and a non-combustible component, and the discharge For a waste treatment device including a pyrolysis gas from the device and a combustible component containing ash from the separation device, and a combustion melting furnace for performing combustion melting treatment of the pyrolysis gas and combustible component containing ash Liquid thermal waste other than the waste and / or water, the pyrolysis reactor, the discharge device, a pyrolysis gas flow path through which the pyrolysis gas flows from the discharge device to the combustion melting furnace, the combustion Melting furnace, directly connected to the combustion melting furnace By introducing the liquid waste into at least one of the exhaust gas passages through which the exhaust gas from the combustion melting furnace flows while adjusting the flow rate, and / or the temperature inside the furnace of the combustion melting furnace. A method for operating a waste treatment device, which is characterized by performing control.