JP2005249262A - Low quality refuse incineration system with low quality refuse incinerator and power generation plant - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a low quality refuse incineration system with a low quality refuse incinerator and a power generation plant capable of stably burning even a low quality refuse with high water content, effectively utilizing conventional devices and a plant biomass such as straw which was often discarded, and achieving highly efficient power generation when a power generation utilizing waste heat from the incinerator is performed. <P>SOLUTION: The incinerator 30 for incinerating the low quality refuse with high water content comprises a throwing-in hopper 31 for supplying the low quality refuse into the furnace and a combustion chamber formed of a drying area, a main combustion area, and a rear combustion area. A means 37 supplying a carbide 25 generated by carbonizing the plant biomass such as straw into the furnace is installed at a portion different from the throwing-in hopper 31. A carbide supply means 37 is formed to throw the carbide into the dry area, and the low quality refuse is burned together with the carbide. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to an incinerator that incinerates low-quality waste having a high water content, and further relates to an incineration system for low-quality waste provided with a power generation facility that generates power using waste heat of the incinerator.

Some of the garbage collected in developing urban and rural areas is difficult to incinerate, such as low-quality waste and straw with high moisture content.
Generally, the lower self-combustion calorific value in an incinerator is 3300-4200 kJ / kg (800-1000 kcal / kg). Therefore, in the case of low-quality waste with high moisture content and low calorific value less than the self-flammability limit, it is difficult to incinerate alone and cannot be stably incinerated, and high combustion from the standpoint of controlling harmful substances such as dioxins. There was a need to maintain temperature, and auxiliary fuel had to be used. As auxiliary fuel, fossil fuels such as heavy oil were used, which caused global warming.
In addition, it was difficult to improve the power generation efficiency.

Further, as shown in FIG. 5A, a large amount of waste sewage is generated while low-quality waste containing a large amount of waste having a high water content such as garbage is stored in the waste pit. Waste sewage may be generated at about 0.12m ³ per ton of low-quality waste. When 200t / day of low-quality waste is treated, waste sewage will be generated at 24m ³ / day. The generated waste sewage was normally blown into the furnace and incinerated.
FIG. 6 shows a conventional stoker-type incinerator. The structure of this stoker-type incinerator is disclosed in Patent Document 1 (Japanese Patent No. 2575256) and the like.
In the stoker-type incinerator 60, the dust supplied from the charging hopper 61 is sent to the grate 63 by the feeder 62, and the waste layer 70 is moved to the ash discharge port 64 side while incinerated on the grate 63. Here, complete combustion is performed by the auxiliary burner 66, and the ash layer 71 is discharged from the ash discharge port 64. The exhaust gas generated by the incineration is exhausted through the exhaust gas passage 65 and the unburned portion is completely burned. When waste sewage is treated at the same time, waste sewage is blown into the exhaust gas passage 65 to burn and evaporate.

However, incineration by blowing a large amount of waste sewage into low-quality waste that originally has a low calorific value causes the generation of harmful substances such as dioxins due to a decrease in combustion temperature, thus preventing the generation of these harmful substances. This leads to an increase in the amount of auxiliary fuel used.
In recent years, in order to effectively use waste heat generated in incinerators, incineration systems equipped with power generation facilities have become widespread. As described in Patent Document 2 (Japanese Patent Laid-Open No. 5-59905), Patent Document 3 (Japanese Patent Laid-Open No. 8-61604) and the like, steam generated in a waste heat boiler included in an incinerator is used. This is a system for generating electricity by driving a steam turbine.
However, when incinerating low-quality waste in an incinerator equipped with such a power generation facility, there is a problem that power generation efficiency is reduced.

On the other hand, as shown in Fig. 5 (b), straw that is generated due to field cropping in rural areas, but when proper processing is not performed in field or field burning, methane is generated when left unloaded and left unattended. It may cause environmental destruction, such as promoting global warming or causing smoke damage by burning in the field. Plant biomass such as straw, rice husks, and felled wood can be processed by methane fermentation, but this method has the problem that the processing time is long and the reactor becomes large, especially when straw is methane-fermented. Since straw is a cellulosic material, there is a problem that unreacted substances are discharged after the decomposition treatment.
Although a method of incinerating straw in the stoker-type incinerator shown in FIG. 6 is also conceivable, since straw is likely to float and scatter without stopping on the grate, a large amount of powdered carbide is mixed in the fly ash. However, the process becomes complicated.

Japanese Patent No. 2575256 JP-A-5-59905 JP-A-8-61604

  Therefore, in view of the above-mentioned problems of the prior art, the present invention can stably incinerate even low-quality waste with a high water content, and can effectively use plant biomass such as straw that has been conventionally left and discarded. It is another object of the present invention to provide a low-quality waste incineration system including a low-quality waste incinerator and power generation equipment that can be used, and that can improve the power generation rate when generating power using incinerator waste heat.

Therefore, in order to solve this problem, the present invention provides:
An incinerator for incinerating low-quality waste with a high water content, wherein the incinerator has a charging hopper that supplies the low-quality waste into the furnace, and a combustion chamber composed of a dry zone, a main combustion zone, and a post-combustion zone.
A unit different from the charging hopper is provided with a means for supplying carbide generated by carbonizing vegetation biomass such as straw into the furnace, and the carbide supplying means is configured to input the carbide into the dry zone, The low-quality waste is incinerated with the carbide.
If the carbide temperature is low and lower than the ignition temperature of the waste and there is no risk of fire inside the input hopper, the carbide is input from the upper opening of the input hopper, and the carbide is mixed with the low-quality waste and incinerator. You may supply in.

According to the present invention, charcoal of plant biomass such as straw having stable properties is incinerated together with low-quality waste, so that fluctuations in the properties of low-quality waste can be easily absorbed, and stable incineration processing becomes possible. In addition, since the plant biomass is supplied into the furnace as carbides, even plant biomass that is easily scattered like straw can be incinerated without being scattered, and powdered carbides can be prevented from being mixed into the fly ash. . Furthermore, by simultaneously incinerating carbides, the inside of the furnace can be easily maintained at a high temperature, and the use of auxiliary fuel can be suppressed to an unnecessary or minimum amount. Furthermore, it is possible to effectively use plant biomass such as straw, and to prevent environmental damage such as conventional neglect of plant biomass, generation of methane gas by field burning, and smoke damage.
Further, since the carbide takes more time to burn out than liquid fuel such as heavy oil, it can be prevented that the carbide is discharged without being burned by being put into the dry zone.

  Further, in the invention, when incinerating low-quality waste containing special waste consisting of medical waste or specially controlled waste, the input hopper has a double gate damper structure, and the special waste is removed from the input hopper. It is preferable that the enclosed container is supplied to the furnace. This makes it possible to disinfect and sterilize special waste that has been difficult to incinerate in the furnace. Furthermore, since the carbide put into the dry zone forms a layer on the grate, the container of the special waste can be prevented from melting and adhering to the grate.

In addition, in an incinerator having a waste heat boiler, a superheater that superheats steam generated by the waste heat boiler, and a power generation facility that generates power using superheated steam, an incineration system for low-quality waste,
Establishing a carbonization device for carbonizing plant biomass such as straw,
The incinerator has a charging hopper for supplying the low-quality waste into the furnace, and means for supplying carbide generated in the carbonization apparatus into the furnace, and the pyrolysis gas generated in the carbonization apparatus is incinerated. It is characterized by being configured to be introduced into a furnace or the superheater.

  According to the present invention, since the charcoal of plant biomass with stable properties is incinerated together with low-quality waste, stable power generation is possible. Moreover, the power generation efficiency can be improved by effectively using the pyrolysis gas generated in the carbonization apparatus. Moreover, since plant biomass such as straw is used as a raw material for carbide, carbide can be generated in a short time, and the processing time can be shortened. In the present invention, the reason why the pretreatment of plant biomass is carbonized instead of dry is that the carbonized treatment has higher stability of odor generation, rot, etc., and handling properties. Biomass can be stabilized.

In addition, in an incinerator having a waste heat boiler, a superheater that superheats steam generated by the waste heat boiler, and a power generation facility that generates power using superheated steam, an incineration system for low-quality waste,
A biological treatment device that performs biological treatment on sludge water separated from the low-quality waste, and a carbonization device that carbonizes dewatered sludge obtained by dewatering sludge generated by the biological treatment,
The incinerator has a charging hopper for supplying solid content of the low-quality waste into the furnace, and means for supplying carbide generated in the carbonization apparatus into the furnace, and heat generated in the carbonization apparatus. The decomposition gas is introduced into the incinerator or the superheater.
According to the present invention, since it is not necessary to blow waste sewage into the incinerator, the low-quality waste can be stably burned at a high temperature. Moreover, the power generation efficiency can be improved by effectively using the pyrolysis gas generated in the carbonization apparatus.

At this time, it is preferable to provide a kneader for kneading the dewatered sludge and vegetation biomass such as straw before the carbonization apparatus.
The carbonization apparatus is provided with the dewatered sludge supply means and the straw and other plant biomass supply means, which are directly introduced into the carbonization apparatus and mixed at the carbonization apparatus inlet or inside the carbonization apparatus for carbonization treatment. You may do it.
Thereby, the stable carbonization process can be performed, without vegetation biomass such as straw in the carbonization apparatus being scattered.
Furthermore, the low-quality waste includes special waste made of medical waste or specially controlled waste, and the input hopper has a double gate damper structure and encloses the special waste. The container is supplied into the furnace by the charging hopper and is incinerated with the carbide, whereby special waste can be easily disinfected and sterilized in the furnace.

As described above, according to the present invention, even low-quality waste having a high moisture content can be incinerated stably and at a high temperature. Moreover, it is possible to effectively use vegetation biomass such as straw without leaving or burning it as in the past, and to achieve suppression of methane generation and prevention of smoke damage.
Furthermore, the power generation efficiency can be improved by effectively using the pyrolysis gas generated in the carbonization apparatus.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the drawings. However, the dimensions, materials, shapes, relative arrangements, and the like of the components described in this embodiment are not intended to limit the scope of the present invention unless otherwise specified, but are merely illustrative examples. Not too much.
1 is an explanatory view of a waste incineration process according to an embodiment of the present invention, FIG. 2 is a longitudinal sectional view of a stoker type incinerator according to Example 1 of the present invention, and FIG. 3 is a stoker according to Example 2 of the present invention. FIG. 4 is a block diagram of a waste incineration system equipped with power generation equipment according to Embodiment 3 of the present invention.

The outline of the present embodiment will be described with reference to FIG. In this embodiment, the waste sewage generated when low-quality waste having a high water content such as garbage is stored in the waste pit and the drained low-quality waste are treated separately. When 0.12m ³ of waste sewage is discharged per ton of low-quality waste, 24m ³ / day of waste sewage is generated from 200t of low-quality waste per day. The waste sewage is diluted to the extent that it can be biologically treated and subjected to biological treatment (10). The treated water generated in the biological treatment is discharged, while the sludge is dehydrated (11) to a water content of about 80% and introduced into the carbonization device 12. At this time, dehydrated sludge is 1.5 t / day.
On the other hand, the straw recovered in the rural area is also introduced into the carbonization device 12 by a predetermined amount together with the dewatered sludge. The carbide generated in the carbonization apparatus 12 is introduced into the incinerator 30 together with low-quality waste and incinerated. At this time, the pyrolysis gas generated in the carbonization apparatus 12 is introduced into the incinerator 30 and used as a fuel source. The waste heat generated in the incinerator 30 is sent to a power generation facility provided therefor and used for power generation.

  According to this embodiment, the charcoal of plant biomass such as straw with stable properties is incinerated with low-quality waste, so that fluctuations in the properties of low-quality waste can be easily absorbed, and stable incineration processing is possible. In addition, since the plant biomass is supplied to the furnace as carbides, even plant biomass that is easily scattered like straw can be incinerated without being scattered, and powdered carbides can be prevented from being mixed into the fly ash. . Further, by simultaneously incinerating the carbides, the inside of the furnace can be easily maintained at a high temperature, and the use of auxiliary fuel can be suppressed to an unnecessary or minimum amount. Furthermore, it is possible to effectively use vegetation biomass such as straw, and to prevent environmental damage such as conventional vegetation biomass neglect, generation of methane gas by field burning, and smoke damage.

FIG. 2 shows a stoker-type incinerator 30 according to Embodiment 1 of the present invention. The stoker-type incinerator 30 includes a charging hopper 31 for supplying the waste 24 into the furnace, a feeder 32 for sending the waste to a combustion chamber in the furnace, a movable stage and a fixed stage, and a movable stage reciprocatingly moving the garbage stage. A grate 33 for transferring 41, an ash outlet 34 for discharging the ash layer 42 after incineration, an exhaust gas passage 35 for burning unburned components in the exhaust gas, located above the grate 33, and the exhaust gas A secondary air inlet 36 is provided around the path 35 and introduces secondary air.
The space on the grate 33 is a combustion chamber, and is formed from the charging hopper 31 side by a dry region, a main combustion region, and a post-combustion region. Garbage 24 introduced into the combustion chamber by the charging hopper 31 and the feeder 32 is incinerated while blowing primary air 43 from the furnace bottom in the combustion chamber.

Further, when the exhaust gas generated by incineration passes through the exhaust gas passage 35, the unburned components in the exhaust gas are completely burned by the secondary air 44 introduced from the secondary air introduction port 36.
Further, the main feature of the present embodiment is that a carbide supply port 37 is provided above the secondary air introduction port 36. The carbide 25 supplied from the carbide supply port 37 is put into the drying area. The carbide supply port 37 is not limited to the upper side of the secondary air introduction port 36, and may be anywhere as long as the carbide is supplied to the dry region, for example, above the feeder 32.
When the carbide temperature is low and the temperature is lower than the ignition temperature of the waste and there is no fear of fire occurring inside the charging hopper 31, the carbide is injected from the upper opening of the charging hopper 31 and the carbide is mixed with the low-quality waste 24. May be supplied to the incinerator.

The carbide 25 supplied from the carbide supply port 37 includes a carbide generated by carbonizing a sewage biomass such as straw or a biological treatment of waste sewage separated from the low-quality waste, and carbonizing the generated sludge. To do.
These carbides 25 are supplied to the drying area constantly or intermittently and incinerated with the low-quality waste 24 supplied from the input hopper 31.
Thereby, incineration processing of low quality waste can be performed stably at high temperature.

FIG. 3 shows a stoker-type incinerator 30 according to Embodiment 2 of the present invention. This embodiment is a case where low-quality waste contains special waste made of medical waste or specially controlled waste. These special waste is enclosed in a plastic container 45 and is put together with the container 45 in an incinerator 30. Incinerated.
Since the basic configuration of the incinerator 30 is almost the same as that of the first embodiment shown in FIG. 2, the description of the same configuration is omitted.
The main feature of the second embodiment is that the charging hopper 31 for supplying garbage into the furnace has a double gate damper structure. The double gate damper structure is composed of an upper damper 46 and a lower damper 47. By alternately opening and closing these dampers, the furnace gas is supplied when the container 45 containing the special waste is supplied into the furnace. Prevents leakage to the outside.

The container 45 charged into the furnace from the charging hopper 31 is a biological treatment of the carbide 25 generated by carbonizing plant biomass such as straw or the waste sewage separated from the low-quality waste, and carbonizes the generated sludge. The generated carbide 25 is incinerated on the grate 41 and discharged from the ash outlet 34.
The carbide 25 may be constantly supplied to the drying area above the grate 41 and the container 45 may be put on the carbide 25. As a result, the container 45 can be prevented from melting and adhering to the grate 41. Further, even the container 45 containing low-quality waste can be stably burned at a high temperature because it is incinerated with the carbide 25.
When charging the container 45 from the charging hopper 31, both general low-quality waste and the container 45 that do not need to be sealed in the container 45 may be supplied from the charging hopper 31. Under this condition, the negative pressure in the incinerator is material-sealed with general low-quality waste, so it is not necessary to apply the double gate damper structure.

Next, a specific example of the second embodiment will be described.
The low-quality waste 24 to be treated includes special waste made of infectious medical waste or specially managed waste, and non-specially managed waste medical waste may also be treated. The infectious medical waste includes, for example, biohazards such as bacteria, fungi and viruses that are at risk of infection, and chemicals such as carcinogenicity, teratogenicity, mutagenicity, sperm toxicity, and other toxic substances. Examples include hazards and mechanical hazards that are sharp blades such as injection needles and scalpels. In order to prevent the container 45 from being blocked inside the lower chute, the container 45 has a length of three sides shorter than the length of the short side of the lower chute of the charging hopper 31, preferably the short side of the lower chute. It shall be made of plastic with a dimension of 1/2 or less of the short side of the length, and the softening point and melting point shall be 200 to 300 ° C. The mixing amount of the container 45 is desirably 20% by weight or less of other low-quality waste.
When a double gate damper structure is applied, only the container 45 may be supplied to the charging hopper.
The material of the container 45 may be made of cardboard or plastic bag in addition to plastic.

When processing the special waste, the disinfectant 48 is sprayed on the inner lower part of the charging hopper 31 to disinfect the waste sewage flowing down to the inner wall of the lower chute of the charging hopper. In addition, the disinfectant 48 is sprayed and applied to the feeder 32 to disinfect the waste sewage adhering to the feeder 32. Further, the sterilized wastewater that has flowed out of the charging hopper 31 and the feeder 32 is washed away with the washing water 49 or the disinfectant and sprayed into the furnace. The disinfectant prevents corrosion of incinerator equipment.
As a method for preventing corrosion, a corrosion inhibitor may be mixed in the disinfectant. The lower feed table of the feeder 32 has a downward slope from the horizontal plane toward the inside of the furnace in order to prevent the sterilized waste water on the feeder 32 and the feed table from flowing into the incinerator and out of the furnace. To do. The downward slope angle is 0-5 ° with respect to the horizontal plane. A scraper is attached to the sliding part of the feed table to prevent the septic waste from flowing out of the furnace.
The pressure in the incinerator 30 is set to a negative pressure, and the exhaust gas passage 35 is set to about 800 ° C. or higher so that the exhaust gas residence time is 2 seconds or longer.
Further, an organic substance concentration sensor 50 is installed above the exhaust gas path 35, and the oxygen enrichment amount of the primary air 43 is controlled by the oxygen generator 51 based on the organic substance concentration in the furnace detected by the organic substance concentration sensor 50. Adjust the oxygen concentration in the furnace. For example, when the organic matter concentration is high, the oxygen enrichment amount is increased, and the oxygen concentration in the furnace is increased to promote the combustion of unburned components in the exhaust gas.
Note that when the air ratio in the furnace is 1.0 or less and the pyrolysis gas volatilized from the waste is not burned in the furnace, but completely burned in the gas turbine or gas engine installed downstream of the furnace, the organic matter concentration is In order to increase, the amount of oxygen supplied to the furnace and / or the concentration of supplied oxygen are reduced to lower the oxygen concentration in the furnace. Based on the organic substance concentration in the furnace detected by the organic substance concentration sensor 50, the amount of oxygen supplied to the furnace and / or the supply oxygen concentration and the oxygen concentration in the furnace are controlled. Regardless of whether the amount of oxygen and / or oxygen supplied to the furnace is controlled based on the detected oxygen concentration in the furnace, or based on the amount of power generated by the gas turbine or gas engine, You may control based on the temperature and pressure to detect. Moreover, even if it controls based on the brightness | luminance of the flame, high temperature material surface, etc. which are detected in each part in a furnace, you may control the amount of supplied air, the amount of exhaust gas, and the amount of pyrolysis gas by the opening degree of a damper, etc. Further, a fuel cell may be applied to the downstream side of the furnace to generate power.

In the incineration process in the incinerator 30, first, the container 45 filled with the special waste is supplied from the input hopper 31, and the upper damper 46 and the lower damper 47 are alternately opened and closed, and the container 45 is input onto the feeder 32. , And transferred onto the grate 33 by the feeder 32. The carbide 25 supplied from the carbide supply port 37 forms a layer on the grate 33, and the container 45 is put on the carbide layer. The carbide 25, the container 45, and other low-quality waste are incinerated simultaneously. The container 45 is softened and melted in the drying area of the combustion chamber, and the contents are mixed with other low-quality waste by the stirring effect of the grate. These mixed wastes are incinerated and sterilized by a high-temperature combustion flame.
As described above, in this embodiment, special waste made of infectious medical waste or specially managed waste that has been difficult to treat in an incinerator can be easily and safely treated.
When charging the container 45 from the charging hopper 31, both general low-quality waste and the container 45 that do not need to be sealed in the container 45 may be supplied from the charging hopper 31. Under this condition, the negative pressure in the incinerator is material-sealed with general low-quality waste, so it is not necessary to apply the double gate damper structure.

FIG. 4 is a configuration diagram of a waste incineration system including a power generation facility according to Embodiment 3 of the present invention. The system includes the incinerator 30 shown in the first embodiment or the second embodiment.
The waste incineration system according to the third embodiment includes a biological treatment apparatus 10 such as anaerobic biological treatment or aerobic biological treatment, a dehydrator 11 that performs mechanical or chemical dehydration, a kneader 20, and an object to be treated. A carbonization apparatus 12 that performs carbonization by indirect heating, the incinerator 30 shown in the first or second embodiment, a superheater 13 that superheats steam to generate superheated steam, and a steam turbine 14 that is driven by superheated steam. , A generator 15 driven by the steam turbine 14 to generate electric power, a condenser 16, a bag filter 18 for collecting dust in the exhaust gas, and a chimney 19.

The waste sewage 21 generated in the waste pit is diluted to a concentration suitable for biological treatment and biologically treated to a level at which the treated water can be discharged by the biological treatment device 10, the treated water is discharged, and the sludge is dehydrated. 11 and dehydrated. The dewatered sludge 22 is introduced into the kneader 20 and kneaded together with the plant biomass 23 such as straw. The kneaded material generated in the kneader 20 is introduced into the carbonization device 12 to form a carbide 25, and the carbide 25 is fed to the incinerator 30.
In the incinerator 30, the solid waste 24 from which the waste sewage 21 is separated from the low-quality waste is supplied into the furnace from the input hopper and incinerated with the carbide 25.

On the other hand, the pyrolysis gas 26 generated in the carbonization device 12 is introduced into the superheater 13 and used as a heat source for the superheater 13. The steam generated in the boiler 17 included in the incinerator 30 is superheated in the superheater 13, and the steam turbine 14 is driven by the superheated steam 27 generated here, and the driving energy of the steam turbine 14 is used. Electric power is generated by the generator 15. The superheated steam 27 is cooled by the condenser 16 and supplied to the boiler 17.
Further, the pyrolysis gas 26 can be introduced into the incinerator 30 and used as auxiliary fuel.
On the other hand, the exhaust gas 28 generated in the incinerator 30 is discharged from the chimney 19 after fly ash is removed by the bag filter 18. At this time, the exhaust gas 28 may be introduced into a gas turbine, gas engine, fuel cell, etc. (not shown) and used for power generation.
Thus, according to this system, the incinerator 30 can stably incinerate at a high temperature, and the pyrolysis gas 26 generated in the carbonization apparatus 12 is introduced into the incinerator 30 or the superheater 13. By doing so, highly efficient power generation becomes possible.
Under the condition that the concentration of the high-temperature corrosive gas component contained in the pyrolysis gas 26 is lower than the concentration of the high-temperature corrosive gas component contained in the exhaust gas 28, it is possible to further increase the temperature and pressure of the superheater outlet steam condition.
The superheater 13 may be installed inside the boiler 17.

  In the present embodiment, when it is predicted that the carbide 25 treated by the carbonization apparatus 12 contains a corrosive component that is not suitable for the high temperature and high pressure of the outlet steam of the boiler 17, the carbide 25 is supplied to the incinerator 30. It can be stopped and incinerated or melted alone. As described above, it is preferable that the carbonization apparatus, the biological treatment apparatus, the incinerator, and the like are configured so as to be able to operate independently, and are operated by switching appropriately.

It is explanatory drawing of the waste incineration process which concerns on one Embodiment of this invention. It is a longitudinal cross-sectional view of the stoker type incinerator which concerns on Example 1 of this invention. It is a longitudinal cross-sectional view of the stoker type incinerator which concerns on Example 2 of this invention. It is a block diagram of the refuse incineration system provided with the power generation equipment which concerns on Example 3 of this invention. It is description of the conventional waste incineration process. It is a longitudinal cross-sectional view of the conventional stoker type incinerator.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Biological treatment apparatus 11 Dehydrator 12 Carbonizer 13 Superheater 14 Steam turbine 15 Generator 16 Condenser 17 Boiler 18 Bag filter 19 Chimney 20 Kneader 21 Waste sewage 22 Dehydrated sludge 23 Plant biomass 24 Low quality garbage 25 Carbide 26 Pyrolysis Gas 27 Superheated steam 30 Incinerator 31 Input hopper 32 Feeder 33 Grate 34 Ash outlet 35 Exhaust gas path 36 Secondary air inlet 37 Carbide supply port 41 Garbage layer 42 Ash layer 43 Primary air 44 Secondary air 45 Container 46 Upper damper 47 Lower damper 48 Disinfectant 49 Washing water 50 Organic substance sensor 51 Oxygen generator 60 Stoker type incinerator 61 Input hopper 62 Feeder 63 Grate 64 Ash outlet 65 Exhaust gas path 66 Auxiliary burner 70 Waste layer 71 Ash layer

Claims (7)

An incinerator for incinerating low-quality waste with a high water content, wherein the incinerator has a charging hopper that supplies the low-quality waste into the furnace, and a combustion chamber composed of a dry zone, a main combustion zone, and a post-combustion zone.
A means for supplying carbide generated by carbonizing plant biomass such as straw into the furnace is provided, and the carbide supply means is configured to inject the carbide into the dry zone, and the low-quality waste is incinerated with the carbide. A low-quality waste incinerator characterized by   The incinerator according to claim 1, wherein low quality waste containing special waste made of medical waste or specially controlled waste is incinerated, wherein the input hopper has a double gate damper structure, and the special waste is supplied from the input hopper. A low-quality waste incinerator characterized in that a container enclosing a container is supplied into the furnace. In an incinerator for low-quality waste comprising an incinerator having a waste heat boiler, a superheater that superheats steam generated by the waste heat boiler, and a power generation facility that generates power using the superheated steam,
Establishing a carbonization device for carbonizing plant biomass such as straw,
The incinerator has a charging hopper for supplying the low-quality waste into the furnace, and means for supplying carbide generated in the carbonization apparatus into the furnace, and the pyrolysis gas generated in the carbonization apparatus is incinerated. A low-quality waste incineration system equipped with a power generation facility characterized by being introduced into a furnace or the superheater. In an incinerator for low-quality waste comprising an incinerator having a waste heat boiler, a superheater that superheats steam generated by the waste heat boiler, and a power generation facility that generates power using the superheated steam,
A biological treatment device that performs biological treatment on sludge water separated from the low-quality waste, and a carbonization device that carbonizes dewatered sludge obtained by dewatering sludge generated by the biological treatment,
The incinerator has a charging hopper for supplying solid content of the low-quality waste into the furnace, and means for supplying carbide generated in the carbonization apparatus into the furnace, and heat generated in the carbonization apparatus. A low-quality waste incineration system equipped with power generation equipment, characterized in that cracked gas is introduced into the incinerator or the superheater.   The incineration system for low-quality waste provided with power generation equipment according to claim 4, wherein a kneader for kneading the dewatered sludge and vegetation biomass such as straw is provided upstream of the carbonization apparatus.   5. The decarbonized sludge supply means and a straw biomass biomass supply means are provided in the carbonization apparatus, and the carbonization apparatus carbonizes the dehydrated sludge and the plant biomass. A low-quality waste incineration system equipped with power generation facilities.   In the case where the low-quality waste includes special waste made of medical waste or special management waste, the input hopper has a double gate damper structure, and a container in which the special waste is enclosed is The incineration system for low-quality waste with power generation equipment according to any one of claims 4 to 6, wherein the incineration system is supplied from the charging hopper into the furnace and incinerated together with the carbide.

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