JP2008215660A - Kiln and waste gasification system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a kiln regulating flows and regulating temperature to a predetermined value, and a waste gasification system. <P>SOLUTION: A first kiln 10A comprises: a kiln shell 102 supplied with waste 101 which is a treated material; an outer cylinder 103 provided around the kiln shell 102 to cover it with a predetermined space; a combustion gas supply line 105 provided at the peripheral wall of the outer cylinder 103 to supply the space with combustion exhaust gas 104 for indirectly heating the treated material supplied into the kiln shell 102; and a combustion gas exhaust line 106 exhausting the combustion exhaust gas 104 after indirectly heated, to the outside of the outer cylinder 103. A flow regulating gate 11A for regulating the flow of the combustion exhaust gas 104 is disposed at an opening 105a of the combustion gas supply line 105 of the combustion exhaust gas 104. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a kiln furnace and a waste gasification system that heats waste to generate gasified gas and generates energy based on the generated gasified gas.

  In order to recover energy from organic waste such as municipal waste, sewage sludge, industrial waste, and biomass, the waste is heated and pyrolyzed to produce gasified gas. In particular, kiln furnaces and waste gasification systems that generate energy are attracting attention from the viewpoint of environmental protection and resource saving.

  FIG. 12 is a perspective view showing a configuration of a conventional kiln furnace. FIG. 13 is a cross-sectional view in a direction orthogonal to the axis of a conventional kiln furnace. As shown in FIGS. 12 and 13, the conventional kiln furnace 100 has a kiln shell 102 that is an inner cylinder to which waste 101 such as dried sludge is supplied, and a predetermined space S around the kiln shell 102. An outer cylinder 103 provided to cover, and a combustion gas that is provided on the peripheral wall of the outer cylinder 103 and that supplies combustion exhaust gas 104 that indirectly heats the waste 101 supplied into the kiln shell 102 to the space S A supply passage 105 and a combustion gas discharge passage 106 for discharging the combustion exhaust gas 104 after indirect heating to the outside of the outer cylinder 103 are provided.

The kiln shell 102 is a rotary type, and the waste 101 is put into the kiln shell 102 and discharged from, for example, a combustion furnace (not shown) into the space S between the outer cylinder 103 and the kiln shell 102. The high-temperature combustion exhaust gas 104 is introduced into each room partitioned by the partition wall 107 through the combustion gas supply path 105, and the waste 101 in the kiln shell 102 is removed by the high-temperature combustion exhaust gas 104 in a state where the air is shut off. The combustion exhaust gas 104 is exhausted from the combustion gas discharge passage 106 by being indirectly heated and decomposed. The waste 101 in the kiln shell 102 is gasified and discharged as a pyrolysis gas 108, and a carbide / incombustible substance 109 is generated as a pyrolysis residue (Patent Documents 1, 2, and 3).
In the figure, reference numeral 110 is a partition wall provided on the peripheral wall of the outer cylinder 103 to partition the combustion gas supply path 105 and the combustion gas discharge path 106, and reference numeral 111 is provided in the combustion gas discharge path 106. And a flow rate adjusting gate for adjusting the flow rate of the combustion exhaust gas 104.

JP 2000-283429 A JP 2000-283431 A JP 2002-333119 A

  Here, in the conventional kiln furnace 100, the flow rate distribution of each room of the kiln shell 102 is adjusted to adjust the temperature of each part of the kiln shell 102. This flow rate adjustment is performed on the combustion gas supply path 105 side. Since the gas temperature is high, the flow rate adjustment gate 111 provided in the opening 106a of the combustion gas discharge passage 106 is used.

  However, as shown in FIG. 14, the conventional kiln furnace 100 enters a place where the flue gas 104 is likely to enter when the flow rate is adjusted in the flue gas discharge passage 106 on the outlet side of the flue gas 104, and the concentration of inflow is increased. Since the backflow 114 is generated in the room 113 and flows again into another room, there is a problem that it is difficult to adjust the flow rate to a predetermined temperature.

  Alternatively, as shown in FIG. 15, the combustion exhaust gas 104 flows through the gap of the partition wall 107 with another room and may cause inflow / outflow 115 to the other room of the combustion exhaust gas 104. There is a problem that it is difficult to adjust the temperature.

  In view of the above problems, an object of the present invention is to provide a kiln furnace and a waste gasification system that can adjust the flow rate and can be adjusted to a predetermined temperature.

  The first invention of the present invention for solving the above-mentioned problems is a rotating cylinder to which an object to be processed is supplied, an outer cylinder provided so as to cover the rotating cylinder with a predetermined space, A combustion gas supply path that is provided on a peripheral wall of the outer cylinder and that indirectly heats the object to be processed and is supplied to the inside of the rotating cylindrical body, and a combustion gas after indirectly heating the combustion gas. A kiln furnace having a combustion gas discharge path for discharging outside the outer cylinder, and a flow rate adjusting gate for adjusting the flow rate of the combustion gas is disposed at an opening of the combustion gas supply path for the combustion gas. It is in a kiln furnace characterized by

  According to a second aspect of the present invention, there is provided a kiln furnace according to the first aspect, wherein the flow rate adjusting gate is disposed at an opening of the combustion gas discharge passage.

  A third invention is the kiln furnace according to the first or second invention, wherein the flow rate adjusting gate is made of a ceramic plate.

  According to a fourth invention, in the first or second invention, the flow rate adjusting gate is provided with a cooling pipe for cooling the flow rate adjusting gate in one or both of the inside and the surface of the flow rate adjusting gate. It is in the kiln furnace characterized by.

  According to a fifth aspect of the present invention, there is provided the kiln furnace according to the fourth aspect, wherein a heat insulating material is disposed on the surface of the flow rate adjusting gate.

  A sixth invention is a kiln furnace according to any one of the first to fifth inventions, wherein at least one thermometer for measuring the temperature of the surface of the rotating cylindrical body is disposed. .

  According to a seventh aspect of the present invention, there is provided a supply means for conveying an object to be processed, a kiln furnace according to any one of claims 1 to 6, and a pyrolysis gas generated in the kiln furnace according to any one of claims 1 to 6. A combustion furnace for producing a high-temperature combustion exhaust gas, a combustion exhaust gas heat-exchanged in the kiln furnace according to any one of claims 1 to 6, and a part of the combustion exhaust gas discharged from the combustion furnace. The combined steam is used as a heat source for generating steam, and a generator is driven using the generated steam, and the water condensed by the generator is recovered again by a condenser and circulated by the boiler. A waste gasification system comprising: a dust removing device that removes the exhaust gas that is exchanged and discharged; and a chimney that discharges the exhaust gas removed by the dust removing device.

  An eighth invention is the waste gasification system according to the seventh invention, further comprising a drying device for drying the waste in a stage preceding the kiln furnace according to any one of the first to sixth aspects. .

  According to the present invention, since the flow rate adjustment gate for adjusting the flow rate of the combustion exhaust gas is disposed at the opening of the combustion gas supply path of the combustion exhaust gas, the flow rate of the combustion exhaust gas can be easily adjusted, The back flow of the combustion exhaust gas can be suppressed, the flow rate of the combustion exhaust gas can be easily adjusted, and each part of the rotating cylindrical body can be adjusted to a predetermined temperature.

  Hereinafter, the present invention will be described in detail with reference to the drawings. Note that the present invention is not limited to the embodiments. In addition, constituent elements in the following embodiments include those that can be easily assumed by those skilled in the art or those that are substantially the same.

[First embodiment]
A kiln furnace according to a first embodiment of the present invention will be described with reference to the drawings.
FIG. 1 is a cross-sectional view in a direction orthogonal to the axis of the first kiln furnace according to the present embodiment. Since the first kiln furnace according to the present embodiment is substantially the same as the configuration of the conventional kiln furnace 100 shown in FIGS. 12 to 15, the conventional kiln furnace 100 shown in FIGS. The same components as those in FIG.
As shown in FIG. 1, a first kiln furnace 10A according to the present embodiment covers a kiln shell 102 to which a waste 101 as an object to be treated is supplied, and covers the kiln shell 102 with a predetermined space around it. And a combustion gas supply path 105 that is provided on the peripheral wall of the outer cylinder 103 and that feeds the combustion exhaust gas 104 that indirectly heats the workpiece supplied to the inside of the kiln shell 102 to the space. And a combustion gas discharge passage 106 for discharging the combustion exhaust gas 104 after indirect heating to the outside of the outer cylinder 103, and in the opening 105 a of the combustion gas supply passage 105 of the combustion exhaust gas 104. A flow rate adjusting gate 11A for adjusting the flow rate of the combustion exhaust gas 104 is provided.

  By providing the flow rate adjusting gate 11A for adjusting the flow rate of the combustion exhaust gas 104 at the opening 105a of the combustion gas supply path 105 of the combustion exhaust gas 104 as in the first kiln furnace 10A according to the present embodiment. The flow rate of the combustion exhaust gas 104 can be easily adjusted.

  As a result, since the back flow of the combustion exhaust gas 104 does not occur, the flow rate adjustment of the combustion exhaust gas 104 can be facilitated.

  Further, in the first kiln furnace 10A according to the present embodiment, for example, a ceramic plate can be used as the flow rate adjusting gate 11A. By using a ceramic plate as the flow rate adjusting gate 11A, the combustion exhaust gas 104 can withstand, for example, a high temperature of 1000 ° C. or more.

  Further, in the first kiln furnace 10A according to the present embodiment, a hydraulic cylinder 12 is disposed at the other end of the flow rate adjusting gate 11A as shown in FIG. 2, or the flow rate as shown in FIG. A screw 13 is disposed at the other end of the adjustment gate 11A. In order to move the flow rate adjusting gate 11A up and down, for example, as shown in FIG. 2, a hydraulic cylinder 12 is disposed at the other end of the flow rate adjusting gate 11A, or as shown in FIG. The flow rate adjusting gate 11A can be moved up and down by disposing the screw 13 at the other end of the flow rate.

  Further, the present invention is not limited to this as long as it is a drive device that moves the flow rate adjusting gate 11A up and down, and other devices may be used.

In the second kiln furnace 10A according to the present embodiment, a thermometer may be provided to measure the temperature of the surface of the kiln shell 102.
FIG. 4 is a view in which a thermometer is provided on the surface of the kiln shell 102. As shown in FIG. 4, for example, six thermometers T _{1 to} T ₆ are arranged on the surface of the kiln shell 102, whereby the temperature at a predetermined place on the surface of the kiln shell 102 can be measured.

Then, the thermometers T _{1 to} T ₆ provided for the respective openings 105a of the kiln shell 102 are used to measure the temperature, and the measurement result is transmitted to the control device (CPU) 14, and each of the above-mentioned measurements is performed based on the measurement result. The opening degree of the flow rate adjusting gate 11A is adjusted.

  FIG. 5 is a flowchart showing process steps for adjusting the opening of the flow rate adjustment gate. As shown in FIG. 5, the temperature T at each opening 105a is measured and compared with a predetermined reference temperature (Tsv) for determination. When it is determined that the temperature T at each opening 105a is equal to or higher than a predetermined temperature (Tsv), the flow rate adjusting gate 11A provided at the opening 105a is closed and the gate opening is reduced to reduce combustion exhaust gas. 104 Decrease the flow rate.

  When it is determined that the temperature of each thermometer is equal to or lower than a predetermined reference temperature (Tsv), the flow rate adjusting gate 11A provided in the opening 105a is opened to increase the flow rate of the combustion exhaust gas 104.

  Further, although the opening adjustment of the flow rate adjusting gate 11A is automatically performed, it may be manually adjusted as appropriate.

Further, in the second kiln furnace 10A according to the present embodiment, the thermometers T _{1 to} T ₆ are provided for each opening 105a of each room of the kiln shell 102, but the present invention is limited to this. Not a thing.

  Further, in the second kiln furnace 10A according to the present embodiment, the combustion exhaust gas 104 after indirect heating passes through the combustion gas discharge passage 106, and the conventional kiln as shown in FIGS. After exiting into the room partitioned between the partition walls 107 of the furnace 100 and passing through the opening 106a of the combustion gas discharge passage 106, it is discharged as the pyrolysis gas 108.

  Therefore, according to the first kiln furnace 10A according to the present embodiment, the combustion exhaust gas is provided by providing the flow rate adjusting gate 11A for adjusting the flow rate of the combustion exhaust gas 104 at the opening 105a of the combustion gas supply path 105. The flow rate of the combustion exhaust gas 104 can be easily adjusted, and the back flow of the combustion exhaust gas 104 does not occur, so that the flow rate of the combustion exhaust gas 104 can be easily adjusted.

[Second Embodiment]
A kiln furnace according to a second embodiment of the present invention will be described with reference to FIG.
FIG. 6 is a cross-sectional view in a direction orthogonal to the axis of the second kiln furnace according to the present embodiment. Since the second kiln furnace 10B according to the present embodiment is substantially the same as the first kiln furnace 10A shown in FIG. 1, the same configuration as the first kiln furnace 10A shown in FIG. Are denoted by the same reference numerals, and redundant description is omitted.
As shown in FIG. 6, the second kiln furnace 10B according to the present embodiment has an opening 106a of the combustion gas discharge passage 106 in addition to the configuration of the first kiln furnace 10A shown in FIG. Also, a flow rate adjusting gate 11A for adjusting the flow rate of the combustion exhaust gas 104 is provided.
That is, in the second kiln furnace 10B according to the present embodiment, the flow rate adjusting gate 11A is arranged in the openings 105a and 106a of the combustion gas supply path 105 and the combustion gas discharge path 106 of the combustion exhaust gas 104. It is made up.

  Like the second kiln furnace 10B according to the present embodiment, the flow rate adjusting gate 11A is also disposed in the opening 106a of the combustion gas discharge path 106, so that the combustion gas supply path 105, the combustion gas Since the opening degree of both openings 105 a and 106 a of the exhaust passage 106 can be adjusted, the flow rate of the combustion exhaust gas 104 flowing through the combustion gas supply passage 105 and the combustion exhaust gas 104 flowing through the combustion gas exhaust passage 106 are adjusted. The flow rate can be made substantially equal.

  That is, if the flow rate adjusting gate 11A provided at the opening 105a of the combustion gas supply path 105 and the flow rate adjusting gate 11A provided at the opening 106a of the combustion gas discharge path 106 are closed, the inflow of the combustion exhaust gas 104 will occur. While reducing the amount, the emission amount of the combustion exhaust gas 104 can also be reduced.

  Further, if the flow rate adjusting gate 11A provided at the opening 106a of the combustion gas discharge path 106 and the flow rate adjustment gate 11A provided at the opening 106a of the combustion gas discharge path 106 are opened, the inflow of the combustion exhaust gas 104 is caused. While increasing the amount, the emission amount of the combustion exhaust gas 104 can also be increased.

  Therefore, according to the second kiln furnace 10B according to the present embodiment, the flow rate adjustment gate 11A is disposed in the openings 105a and 106a of both the combustion gas supply path 105 and the combustion gas discharge path 106. Since the flow rate of the combustion exhaust gas 104 fed to the space between the kiln shell 102 and the outer cylinder 103 can be adjusted, the temperature of the kiln shell 102 can be adjusted.

[Third embodiment]
A kiln furnace according to a third embodiment of the present invention will be described with reference to FIG.
FIG. 7 is a cross-sectional view showing the configuration of the flow rate adjustment gate of the third kiln furnace according to the present embodiment. The third kiln furnace 10C according to the present embodiment is substantially the same as the first kiln furnace 10A shown in FIG. 1, and therefore has the same configuration as the first kiln furnace 10A shown in FIG. Are denoted by the same reference numerals, and redundant description is omitted.
Further, in the drawing, the configuration of the entire third kiln furnace 10C is the same as that of the first kiln furnace 10A shown in FIG. 1, and therefore only the configuration of the flow rate adjusting gate 11B is shown in the present embodiment. .
As shown in FIG. 7, the flow rate adjusting gate 11B of the third kiln furnace 10C according to the present embodiment is replaced with the flow rate adjusting gate 11A of the first kiln furnace 10A shown in FIG. A cooling pipe 16A for supplying cooling water 15 for cooling the flow rate adjusting gate is disposed inside the flow rate adjusting gate.

  In the flow rate adjusting gate 11B of the third kiln furnace 10C according to the present embodiment, the cooling water 15 supplied from the cooling water supply unit 17 is discharged from the cooling water discharge unit 18 through the cooling pipe 16A, and is constantly. The cooling water 15 is circulated in the cooling pipe 16A.

  Like the flow rate adjustment gate 11B of the third kiln furnace 10C according to the present embodiment, a cooling pipe 16A for supplying cooling water 15 for cooling the flow rate adjustment gate 11B is arranged inside the flow rate adjustment gate 11B. By installing, the flow rate adjusting gate 11B itself can be cooled by the cooling water 15, so that the first kiln furnace 10A shown in FIG. 1 or the second kiln furnace 10B shown in FIG. Without using a special alloy or the like used for the flow rate adjusting gate 11A, a normal SS material, SUS material or the like used for the flow rate adjusting gate 11A of the conventional kiln furnace as shown in FIG. 13 can be used.

  Further, the flow rate adjustment gate 11B of the third kiln furnace 10C according to the present embodiment has a water cooling structure for the flow rate adjustment gate 11B, so that the combustion exhaust gas 104 on the opening 105a side of the combustion gas supply path 105 is provided. Since the temperature may be lowered, it is preferable to dispose a heat insulating material 19 on the surface of the flow rate adjusting gate 11B.

  As the heat insulating material 19, for example, a ceramic board or the like can be used.

  FIG. 8 is a cross-sectional view showing another configuration of the flow rate adjusting gate. As shown in FIG. 8, the flow rate adjusting gate 11C is a water cooling structure of the flow rate adjusting gate 11B, and the cooling pipe 16B meanders the inside of the flow rate adjusting gate. By making the inside of the flow rate adjusting gate 11C meander like the cooling pipe 16B, the cooling effect of the combustion exhaust gas 104 by the flow rate adjusting gate 11C can be increased.

  Further, in the third kiln furnace 10C according to the present embodiment, the cooling pipes 16A and 16B are disposed inside the flow rate adjustment gates 11B and 11C as the water cooling structure of the flow rate adjustment gates 11B and 11C. However, the present invention is not limited to this, and the cooling pipe 16 may be disposed on the surfaces of the flow rate adjusting gates 11B and 11C.

  Since the flue gas 104 can be directly cooled by disposing the cooling pipes 16A and 16B on the surfaces of the flow rate adjusting gates 11B and 11C, the cooling effect of the flue gas 104 by the flow rate adjusting gate 11B can be reduced. The temperature of the combustion exhaust gas 104 can be easily adjusted.

[Fourth embodiment]
A kiln furnace according to a fourth embodiment of the present invention will be described with reference to FIG.
FIG. 9 is a cross-sectional view in a direction orthogonal to the axis of the fourth kiln furnace according to the present embodiment. Since the fourth kiln furnace 10D according to the present embodiment is substantially the same as the first kiln furnace 10A shown in FIG. 1, the same configuration as the first kiln furnace 10A shown in FIG. Are denoted by the same reference numerals, and redundant description is omitted.
As shown in FIG. 9, in addition to the configuration of the first kiln furnace 10A shown in FIG. 1, the fourth kiln furnace 10D according to the present embodiment includes an opening 105a of the combustion gas supply path 105. A gas flow of the combustion exhaust gas 104 is provided so as to be in a tangential direction of the kiln shell 102.

  As in the fourth kiln furnace 10D according to the present embodiment, the opening 105a of the combustion gas supply path 105 is provided so that the gas flow of the combustion exhaust gas 104 is in the tangential direction of the kiln shell 102. Since the gas flow of the combustion exhaust gas 104 discharged from the opening 105a of the combustion gas supply path 105, which is the inlet side of the combustion exhaust gas 104, is supplied in the tangential direction of the kiln shell 102, it collides with the kiln shell 102. Can be reduced.

  As a result, ash such as fly ash contained in the flue gas 104 is reduced from adhering to the surface of the kiln shell 102, and the ash layer once adhering to the surface of the kiln shell 102 is also separated by the gas flow of the flue gas 104. -Can be removed.

  Further, in the fourth kiln furnace 10D according to the present embodiment, the gas temperature of the combustion exhaust gas 104 is, for example, a high temperature of 1000 ° C. or higher, and the radiant heat transfer of the combustion exhaust gas 104 is the combustion exhaust gas 104. Heat transfer efficiency is larger than convective heat transfer. For this reason, the fourth kiln furnace 10D according to the present embodiment reduces the collision of the flue gas 104 directly with the kiln shell 102 as in the conventional kiln furnace 100 shown in FIGS. Even if the heat transfer coefficient at the collision part is low, there is little influence on the heat transfer performance of the kiln furnace.

  Therefore, according to the fourth kiln furnace 10D according to the present embodiment, the collision of the combustion exhaust gas 104 with the kiln shell 102 is reduced, so that ash adhesion and ash accumulation on the surface of the kiln shell 102 are reduced. In addition, since the surface temperature of the kiln shell 102 can be accurately measured, the surface temperature of the kiln shell 102 can be adjusted more accurately by adjusting the flow rate of the combustion exhaust gas 104.

[Fifth embodiment]
A first waste gasification system according to a fifth embodiment of the present invention will be described with reference to FIG.
FIG. 10 is a diagram showing a configuration of the first waste gasification system according to the present embodiment. The externally heated kiln furnace 1004 of the first waste gasification system 1000A according to the present embodiment uses any of the first kiln furnace 10A to the fourth kiln furnace 10D shown in FIGS. Therefore, a duplicate description is omitted.
As shown in FIG. 10, a first waste gasification system 1000A according to the present embodiment includes a crusher 1001 that crushes stored waste 101, and a screw feeder 1002 that conveys crushed waste 101. Combusting the pyrolysis gas 108 generated in the kiln furnace 1004, the supply means 1003, the kiln furnace 1004 that carbonizes the waste 101 to produce the pyrolysis gas 108 and the carbide / incombustible material 109, A combustion furnace 1005 that is a high-temperature combustion exhaust gas 104, a heating gas 1006 in which the combustion exhaust gas 104 heat-exchanged in the kiln furnace 1004 and a part 104a of the combustion exhaust gas 104 discharged from the combustion furnace 1005 are merged. While being used as a heat source for generating steam, the generator 1007 is driven using the generated steam, and the generator 10 The condenser 1008 collects and condenses the water condensed in the boiler 1009 again, the bag filter 1011 that is a dust removing device that removes the exhaust gas 1010 that is heat-exchanged and discharged by the boiler 1009, and the bag filter 1011. And a chimney 1013 for discharging the exhaust gas 1012 removed by the dust.
The heat recovered as steam in the boiler may be used as steam in addition to power generation. Further, the heat recovery of the combustion exhaust gas may be performed not with a boiler but with a heat exchanger such as an air heater and recovered as hot air.

  As shown in FIG. 10, the waste 101 brought in and stored by a transportation means such as a truck 1018 is crushed by a supply means 1003 constituted by the crusher 1001 and the screw feeder 1002 and then heated. It is continuously fed into the kiln furnace 1004 which is a distribution zone. The motor that is the drive source of the screw feeder 1002 receives a signal from the control device and can control the rotation speed.

  The high temperature combustion exhaust gas 104 is circulated in the outer cylinder 103 of the kiln furnace 1004 to indirectly heat the inside of the kiln shell 102. The waste 101 in the kiln furnace 1004 is decomposed to generate a pyrolysis gas 108 and carbide / incombustible material 109.

  The carbide / incombustible substance 109 is guided to the lower part of the separation / extraction means 1014, and the pyrolysis gas 108 is taken out from the upper part. The carbide / incombustible material 109 is extracted from the lower portion of the separation / extraction means 1014 by an extraction screw 1015. The motor, which is the drive source of the extraction screw 1015, receives a signal from a control device (not shown) so that the rotation speed can be controlled. The lower part of the separation / extraction means 1014 is cooled as a carbide cooling means by, for example, a water cooling conveyor (not shown) or a water tank. Thereby, the high-temperature carbide / incombustible material 109 is cooled without coming into contact with oxygen.

  Since the pyrolysis gas 108 contains scattered particles, the pyrolysis gas 108 is burned in the combustion furnace 1005 after being removed by the cyclone 1016. Combustion or oxygen-enriched air 1017 in the incinerator 1005 is led to the combustion furnace 1005 from another path.

  A part 104a of the flue gas 104 obtained in the combustion furnace 1005 is led to the outer cylinder 103 of the kiln furnace 1004, used for supplying heat necessary for decomposition, and discharged from the outlet of the outer cylinder 103, which still has a high temperature. The flue gas 104 after the heat supply is joined with a part of the flue gas 104 discharged from the combustion furnace 1005 to become the heating gas 1006 of the boiler 1009.

  The heating gas 1006 of the boiler 1009 is guided to the boiler 1009, where it is used as a heat source for generating steam. The generated steam drives the steam turbine type generator 1007 and is condensed by the condenser 1008. The returned water is returned to the boiler 1009 and circulated.

  The heating gas 1006 of the boiler 1009 exchanges heat with the boiler 1009 to become exhaust gas 1010 from the boiler 1009, and is discharged from the chimney 1013 after dust removal by the bag filter 1011.

  Thus, according to the first waste gasification system 1000A according to the present embodiment, the first kiln furnace 10A to the fourth kiln furnace 10D shown in FIGS. By adopting, the flow rate of the combustion exhaust gas 104 can be easily adjusted, and the waste 101 can be stably carbonized using the combustion exhaust gas 104 to generate the pyrolysis gas 108. it can. As a result, the pyrolysis gas 108 is heat-recovered by a heat exchanger such as the boiler 1009 and used for power generation or as a heating heat source, and the carbide is used for solid fuel or the like for energy recycling, adsorbent or the like. It is possible to recycle materials by using carbides and separating non-combustible materials as valuable materials and cement raw materials. In addition, since the discharged carbide / non-combustible material 109 and the like are heated in an oxygen-free state, and the pyrolysis gas 108 is burned at a high temperature, both solid matter and exhaust gas can be reduced to a very low level. .

[Sixth embodiment]
A waste gasification system according to a sixth embodiment of the present invention will be described with reference to FIG.
FIG. 11 is a diagram showing a configuration of the second waste gasification system according to the present embodiment. Since the kiln furnace of the second waste gasification system according to the present embodiment is substantially the same as the configuration of the first waste gasification system shown in FIG. 10, the first waste gasification system shown in FIG. The same components as those in the waste gasification system are denoted by the same reference numerals, and redundant description is omitted.
As shown in FIG. 11, the second waste gasification system 1000B according to the present embodiment includes a first stage of the kiln furnace 1004 in addition to the configuration of the first waste gasification system 1000A shown in FIG. And a drying device 1021 for drying the sludge 1020.

  When the sludge 1020 contains, for example, about 70 to 85 wt% of moisture, the sludge is supplied to the drying device 1021 using a quantitative feeder 1022 such as a quantitative feeder, and the dried sludge 1023 has a moisture of, for example, 0 to 50 wt%. And supplied to the kiln furnace 1004. Thereafter, the first waste gasification system 1000A shown in FIG. 10 is processed in the same manner as the embodiment described above.

  In the second waste gasification system 1000B according to the present embodiment, the internal temperature of the drying apparatus 1021 is preferably lower than the internal temperature of the kiln furnace 1004 and the temperature at which moisture evaporates. . By providing the drying device 1021 in the previous stage of the kiln furnace 1004, the water having a large latent heat is volatilized at a relatively low temperature, so that the first waste gasification system 1000A shown in FIG. 10 is used. However, the carbide / incombustible material 109 can be obtained at low cost.

  Further, since the dryer circulating gas 1024 discharged from the drying device 1021 contains scattered particles, the dryer circulating gas 1024 is preheated by the heat exchanger 1025 after dust removal by the cyclone 1016, and the combustion furnace 1005. It is made to burn with. Further, the combustion exhaust gas 104 after supplying heat to the cyclone 1016 is joined with a part of the combustion exhaust gas 104 exhausted from the combustion furnace 1005 to form the heating gas 1006 of the boiler 1009. Further, in order to stabilize the combustion in the combustion furnace 1005, a small amount of auxiliary fuel 1026 such as fossil fuel can be supplied to the combustion furnace 1005 as auxiliary fuel.

  Thus, according to the second waste gasification system 1000B according to the present embodiment, the first kiln furnace 10A to the fourth kiln furnace 10D shown in FIGS. By adopting, the adjustment of the flow rate of the combustion exhaust gas 104 can be facilitated, and the waste 101 can be stably carbonized using the combustion exhaust gas 104 to generate the pyrolysis gas 108. . As a result, the pyrolysis gas 108 is recovered by the boiler 1009 and used for power generation, and the carbide is used for solid fuel, adsorbent, etc., and energy is recycled. Material recycling is possible by using it as a raw material. Further, the discharged carbide / incombustible material 109 and the like are heated in an oxygen-free state, and the pyrolysis gas 108 is combusted at a high temperature, so that both solids and exhaust gas can be reduced to a very low level.

  As described above, in the kiln furnace and the waste gasification system according to the present invention, the combustion gas is provided by providing a flow rate adjustment gate for adjusting the flow rate of the combustion gas at the opening of the combustion gas supply path of the combustion gas. Is suitable for use in improving the heat transfer efficiency to the kiln shell, because the flow rate of the gas can be easily adjusted, the back flow of the combustion gas can be suppressed, and each part of the kiln shell can be adjusted to a predetermined temperature. .

It is sectional drawing of the direction orthogonal to the axis | shaft of the 1st kiln furnace which concerns on 1st embodiment by this invention. It is a figure which shows a mode that a flow volume adjustment gate is moved up and down by a hydraulic cylinder. It is a figure which shows a mode that a flow volume adjustment gate is moved up and down with a screw. It is a figure which shows a mode that the opening degree adjustment of a flow volume adjustment gate is performed with a thermometer. It is a flowchart which shows the process process of adjusting the opening degree of a flow volume adjustment gate. It is sectional drawing of the direction orthogonal to the axis | shaft of the 2nd kiln furnace which concerns on 2nd embodiment by this invention. It is sectional drawing which shows the structure of the flow volume adjustment gate of the 3rd kiln furnace which concerns on 3rd embodiment by this invention. It is sectional drawing which shows the other structure of the flow volume adjustment gate of the 3rd kiln furnace which concerns on 3rd embodiment by this invention. It is a cross-sectional enlarged view of the opening part of the combustion gas supply path in the longitudinal direction of the 4th kiln furnace which concerns on 4th embodiment by this invention. It is a figure which shows the structure of the 1st waste gasification system which concerns on 5th embodiment by this invention. It is a figure which shows the structure of the 2nd waste gasification system which concerns on 6th embodiment by this invention. It is a perspective view which shows the structure of the conventional kiln furnace. It is sectional drawing of the direction orthogonal to the axis | shaft of the conventional kiln furnace. It is AA sectional drawing of FIG. It is BB sectional drawing of FIG.

Explanation of symbols

10A 1st kiln furnace 10B 2nd kiln furnace 10C 3rd kiln furnace 10D 4th kiln furnace 10E 5th kiln furnace 10F 6th kiln furnace 10G 7th kiln furnace 11A, 11B Flow rate adjustment gate 12 Hydraulic pressure Cylinder 13 Screw 14 Controller (CPU)
15 the coolant 16A, 16B cooling pipe 17 the cooling water supply unit 18 cooling water discharge portion 19 insulation material T ₁ through T ₆ thermometer 101 Waste 102 Kirunsheru 103 outer tube 104 flue gas 105 the combustion gas supplying passage 105a opening 106 combustion gas Discharge path 106a Opening 107 Bulkhead 108 Pyrolysis gas 109 Carbide / incombustible material 110 Partition wall 111 Flow control gate 113 Concentration of inflow 114 Backflow 115 Inflow / outflow to another room 1000A First waste gasification system 1000B Second waste Product gasification system 1001 Crusher 1002 Screw feeder 1003 Supply means 1004 Kiln furnace 1005 Combustion furnace 1006 Gas for heating 1007 Generator 1008 Condenser 1009 Boiler 1010 Exhaust gas 1011 Bug filter 1012 Dust exhaust gas 101 DESCRIPTION OF SYMBOLS 3 Chimney 1014 Separation extraction means 1015 Extraction screw 1016 Cyclone 1017 Air 1018 Truck 1020 Sludge 1021 Drying device 1022 Fixed supply machine 1023 Dry sludge 1024 Dryer circulation gas 1025 Heat exchanger 1026 Auxiliary fuel

Claims (8)

A rotating cylindrical body to which a workpiece is supplied;
An outer cylinder provided so as to cover with a predetermined space around the rotating cylindrical body;
A combustion gas supply path that is provided on a peripheral wall of the outer cylinder and that supplies combustion gas for indirectly heating the object to be processed supplied to the inside of the rotating cylindrical body to the space;
A kiln furnace having a combustion gas discharge passage for discharging the combustion gas after indirect heating to the outside of the outer cylinder,
A kiln furnace comprising a flow rate adjusting gate for adjusting a flow rate of the combustion gas at an opening of the combustion gas supply path of the combustion gas. In claim 1,
A kiln furnace comprising the flow rate adjustment gate disposed at an opening of the combustion gas discharge passage. In claim 1 or 2,
The kiln furnace, wherein the flow rate adjusting gate is made of a ceramic plate. In claim 1 or 2,
The kiln furnace characterized in that the flow rate adjusting gate is provided with a cooling pipe for cooling the flow rate adjusting gate in one or both of the inside and the surface of the flow rate adjusting gate. In claim 4,
A kiln furnace comprising a heat insulating material disposed on the surface of the flow control gate. In any one of Claims 1 thru | or 5,
A kiln furnace comprising at least one thermometer for measuring the temperature of the surface of the rotating cylindrical body. Supply means for transporting the workpiece;
A kiln furnace according to any one of claims 1 to 6;
A combustion furnace for combusting pyrolysis gas generated in the kiln furnace according to any one of claims 1 to 6 to form high-temperature combustion exhaust gas;
A combustion exhaust gas heat-exchanged in the kiln furnace according to any one of claims 1 to 6 and a part of the combustion exhaust gas discharged from the combustion furnace are joined and used as a heat source for generating steam. A boiler that drives the generator using the generated steam, collects the water condensed by the generator again with a condenser, and circulates;
A dust removal device that removes the exhaust gas that is heat-exchanged and discharged by the boiler;
A waste gasification system comprising a chimney for discharging exhaust gas removed by the dust removing device. In claim 7,
A waste gasification system comprising a drying device for drying the waste in a stage preceding the kiln furnace according to any one of claims 1 to 6.

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