JP3077802B1 - Method and apparatus for carbonizing sludge - Google Patents

Abstract

Abstract: PROBLEM TO BE SOLVED: To produce activated carbide having high adsorption performance from sludge using a flash dryer and an activated carbon furnace. The flue gas is introduced into an activated carbonization furnace to thermally decompose odors. SOLUTION: A sludge dewatered cake is mixed with a circulating dried sludge, and this is pulverized and dried by a crusher 20. The dried sludge is further dried by a flash drying tube 22, and an airflow containing the dried sludge is solidified by a cyclone 24. The activated sludge is separated into air and the majority of the dried sludge is converted into circulating dried sludge. The remaining dried sludge is carbonized and activated in the activated carbonization furnace 32 to produce activated carbon. The heated exhaust gas is heated by exchanging heat with the cyclone 24, and the heated gas is supplied to the crusher 20 to exhaust the exhaust gas from the activated carbonization furnace 32 which has exchanged heat with a part of the dried exhaust gas from the cyclone 24.
The remaining portion of the dried exhaust gas is supplied to a scrubber 60 of a washing type, washed with water and dehumidified, and then introduced into an activated carbonizing furnace 32 to thermally decompose odor components in the gas.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to activated carbon having high adsorption performance by drying sludge such as sewage sludge by a flash dryer and carbonizing and activating the obtained powdery dried sludge in an activated carbonizing furnace. And the waste heat of flue gas from the activated carbonization furnace is used as a heat source for flash drying, and the flash dried exhaust gas is introduced into the activated carbonization furnace to thermally decompose the odor in the dried exhaust gas. The present invention relates to a carbonization method and apparatus.

[0002]

2. Description of the Related Art Conventionally, as a method of treating sludge such as sewage sludge, sludge is dried, then carbonized and activated to produce a carbide, and this carbide is used as an adsorbent or the like. I have. However, in the prior art, use of the obtained carbon as a substitute for activated carbon cannot be expected due to the low ability of the obtained carbide as an adsorbent.

[0003] In the conventional sludge carbonization treatment,
Dewatered sludge (dewatered cake) obtained with water treatment as described in JP-A-7-242408
There is known a method of subjecting it to carbonization treatment as it is or after drying it, followed by molding or granulation. The use of the carbide obtained by the above method as an adsorbent has been an alternative to granular activated carbon in a packed tower activated carbon adsorption and deodorization apparatus.

[0004]

SUMMARY OF THE INVENTION In order to produce carbide having a high adsorption capacity, which can be used as a substitute for activated carbon, from sludge such as sewage sludge, powdery dry sludge having a small particle size is produced and carbonized. It is necessary to reduce the particle size of the carbide obtained in the above and to secure a large reaction surface area necessary for activating the carbide and increasing the adsorption capacity. In addition, in the carbonization and activation treatment of dry sludge, a stream that can be used to activate the steam generated in the previous stage of the carbonization treatment and the carbon dioxide gas generated in the carbonization treatment is created, and the activation reaction of the carbide is efficiently performed to improve the adsorption performance. Need to improve.

[0005] The present invention has been made in view of the above-mentioned points, and an object of the present invention is to dry sludge such as sewage sludge by a flash dryer and to carbonize the obtained powdery dried sludge in an activated carbonization furnace. An object of the present invention is to provide a sludge carbonization method and apparatus capable of producing activated carbide having high adsorption performance by performing an activation treatment. The object of the present invention is
As a flash drying heat source, flash drying exhaust gas heat-recovered from the activated carbonization furnace exhaust gas and / or direct activated carbonization furnace exhaust gas can be used, and odors in the drying exhaust gas by introducing the flash drying exhaust gas into the activated carbonization furnace can be used. An object of the present invention is to provide a method and an apparatus for carbonizing sludge capable of thermally decomposing components.

[0006]

In order to achieve the above object, a method for carbonizing sludge according to the present invention comprises mixing a dewatered sludge cake with circulating dried sludge from a flash drying apparatus, and subjecting the dried sludge mixture to air flow. Pulverized (crushed) with a crusher of a drying device and dried with hot air, and the obtained powdery dried sludge is further dried with hot air in a flash drying tube of a flash drying device, and contains powdery dried sludge. The air stream is introduced into the solid-gas separator to separate the powdery dry sludge and the flash drying exhaust gas, and most of the powdery dry sludge is mixed with the sludge dewatering cake as circulating dry sludge,
The remaining powdery dry sludge obtained by repeating the circulation is introduced into an activated carbonization device, where it is activated and carbonized to produce activated carbide, and a portion of the gas-flow dried exhaust gas from the solid-gas separator is activated carbonized. Mixed with a part of the high-temperature exhaust gas from the furnace and supplied as a heat source for flash-drying to the crusher of the flash dryer, where the remaining high-temperature exhaust gas from the activated carbonizer is exchanged with the remaining flash-dry exhaust gas from the solid-gas separator. To cool and exhaust the hot exhaust gas,
The rest of the flash dried exhaust gas heated by heat exchange is introduced into the activated carbonization device to thermally decompose odor components in the dried exhaust gas (see FIG. 1). In this case, it is possible to remove the harmful substances in the exhaust gas by introducing the exhaust gas from the activated carbon device together with a part of the activated carbon obtained by the above-mentioned carbonization and activation treatment into a filtration dust collector. Examples of the filter-type dust collector include a bag filter and a ceramic filter, and an electric dust collector can be used instead of the filter-type dust collector. Examples of the solid-gas separator include a cyclone, a bag filter, and a multicyclone.

In the method of the present invention, the sludge dewatered cake is mixed with the circulating dried sludge from the flash drying device, and the dried sludge mixture is pulverized (crushed) by a pulverizer of the flash drying device and dried with hot air. After the obtained powdery dried sludge is further dried with hot air in a flash drying tube of a flash drying device, an airflow containing the powdery dry sludge is introduced into a solid-gas separator to form a powdery dry sludge. It is separated into flash drying exhaust gas containing water vapor generated in the drying process, and most of the powdery dry sludge is mixed with the sludge dewatering cake as circulating dry sludge, and the remaining powdery The dried sludge is introduced into the activated carbonization device and carbonized and activated to produce activated carbide.Part of the flash dried exhaust gas from the solid-gas separator is mixed with part of the high temperature exhaust gas from the activated carbon device to flash dry. To the crusher of the flash dryer as heat source for The high-temperature exhaust gas from the carbonized device is heat-exchanged with the remainder of the flash drying exhaust gas from the solid-gas separator to cool and exhaust the high-temperature exhaust gas, and the flash drying exhaust gas containing steam heated by the heat exchange is removed. It is characterized in that it is supplied to a washing scrubber, washed with water and dehumidified, and then introduced into an activated carbonization device to thermally decompose odor components in the dried exhaust gas (see FIG. 2). In this case, it is possible to remove the harmful substances in the exhaust gas by introducing the exhaust gas from the activated carbon device together with a part of the activated carbon obtained by the above-mentioned carbonization and activation treatment into a filtration dust collector.

In the method of the present invention, the circulating dried sludge from the flash drying apparatus is mixed with a sludge dewatered cake, and the dried sludge mixture is pulverized (crushed) by a pulverizer of the flash drying apparatus and dried with hot air. After the obtained powdery dried sludge is further dried with hot air in a flash drying tube of a flash drying device, an airflow containing the powdery dry sludge is introduced into a solid-gas separator to form a powdery dry sludge. It is separated into flash drying exhaust gas and most of the powdery dry sludge is mixed with the sludge dewatering cake as circulating dry sludge, and the remaining powdery dry sludge obtained by repeating the circulation is introduced into the activated carbonization device. Activated carbide is produced by carbonization and activation treatment, and part of the flash dried exhaust gas from the solid-gas separator is exchanged with high temperature exhaust gas from the activated carbonizer to heat the flash dried exhaust gas. Supplied to the crusher of the flash dryer as a heat source for drying Exhaust gas from the activated carbonization device cooled by heat exchange with a part of the flash drying exhaust gas from the solid-gas separator, and the remaining portion of the flash drying exhaust gas from the solid-gas separator is introduced into the activated carbonization device. It is characterized by thermally decomposing odor components in the dried exhaust gas (see FIG. 3). in this case,
Exhaust gas from the activated carbonization device can be introduced into a filter-type dust collector together with a part of the activated carbide obtained by the above-mentioned carbonization and activation treatment to remove harmful substances in the exhaust gas.

In the method of the present invention, the sludge dewatered cake is mixed with the circulating dried sludge from the flash drying apparatus, and the dried sludge mixture is pulverized (crushed) by a pulverizer of the flash drying apparatus and dried with hot air. After the obtained powdery dried sludge is further dried with hot air in a flash drying tube of a flash drying device, an airflow containing the powdery dry sludge is introduced into a solid-gas separator to form a powdery dry sludge. It is separated into flash drying exhaust gas containing water vapor generated in the drying process, and most of the powdery dry sludge is mixed with the sludge dewatering cake as circulating dry sludge, and the remaining powdery The dried sludge is introduced into the activated carbonization device, and carbonized and activated to produce activated carbide, and a part of the flash dried exhaust gas from the solid-gas separator is heat-exchanged with the high temperature exhaust gas from the activated carbon device to produce the flash dried exhaust gas. Heat the heated gas and use it as a flash drying heat source. Supplied to disintegrator flash drying apparatus Te,
Exhaust gas from the activated carbonizer cooled by heat exchange with a part of the flash drying exhaust gas from the solid-gas separator is exhausted, and the remaining flash drying exhaust gas containing water vapor from the solid-gas separator is converted into a water-washing scrubber. After supplying, washing and dehumidifying, it is introduced into an activated carbonization device to thermally decompose odor components in the dried exhaust gas (see FIG. 4). In this case, it is possible to remove the harmful substances in the exhaust gas by introducing the exhaust gas from the activated carbon device together with a part of the activated carbon obtained by the above-mentioned carbonization and activation treatment into a filtration dust collector.

In the method of the present invention, the sludge dewatered cake is mixed with the circulating dried sludge from the flash drying apparatus, and the dried sludge mixture is pulverized (crushed) by a pulverizer of the flash drying apparatus and dried with hot air. After the obtained powdery dried sludge is further dried with hot air in a flash drying tube of a flash drying device, an airflow containing the powdery dry sludge is introduced into a solid-gas separator to form a powdery dry sludge. It is separated into flash drying exhaust gas and most of the powdery dry sludge is mixed with the sludge dewatering cake as circulating dry sludge, and the remaining powdery dry sludge obtained by repeating the circulation is introduced into the activated carbonization device. Activated carbide is produced by carbonization and activation treatment, and part of the flash dried exhaust gas from the solid-gas separator is exchanged with high temperature exhaust gas from the activated carbonizer to heat the flash dried exhaust gas. Supplied to the crusher of the flash dryer as a heat source for drying A part of the flue gas from the activated carbonizer cooled by exchanging heat with a part of the flue gas from the solid-gas separator is exhausted, and the remaining part of the flue gas from the solid-gas separator is discharged from the activated carbon device. It is characterized in that it is introduced into an activated carbonizer together with the rest of the exhaust gas to thermally decompose odor components in the exhaust gas (see FIG. 5). In this case, a part of the exhaust gas from the activated carbonization device can be introduced into the filter-type dust collector together with a part of the activated carbide obtained by the above-mentioned carbonization and activation treatment, thereby removing harmful substances in the exhaust gas.

In the method of the present invention, the sludge dewatered cake is mixed with the circulating dried sludge from the flash drying device, and the dried sludge mixture is pulverized (crushed) by a pulverizer of the flash drying device and dried with hot air. After the obtained powdery dried sludge is further dried with hot air in a flash drying tube of a flash drying device, an airflow containing the powdery dry sludge is introduced into a solid-gas separator to form a powdery dry sludge. It is separated into flash drying exhaust gas containing water vapor generated in the drying process, and most of the powdery dry sludge is mixed with the sludge dewatering cake as circulating dry sludge, and the remaining powdery The dried sludge is introduced into the activated carbonization device, and carbonized and activated to produce activated carbide, and a part of the flash dried exhaust gas from the solid-gas separator is heat-exchanged with the high temperature exhaust gas from the activated carbon device to produce the flash dried exhaust gas. Heat the heated gas and use it as a flash drying heat source. Supplied to disintegrator flash drying apparatus Te,
Part of the flue gas from the activated carbonizer cooled by heat exchange with part of the flash drying flue gas from the solid-gas separator is exhausted, and the remainder of the flash drying flue gas containing steam from the solid-gas separator is washed with water. After being supplied to a scrubber for washing and dehumidification, the dried exhaust gas is introduced into the activated carbonization device together with the rest of the exhaust gas from the activated carbonization device to thermally decompose odor components in the exhaust gas (see FIG. 6). ). In this case, a part of the exhaust gas from the activated carbonization device can be introduced into the filter-type dust collector together with a part of the activated carbide obtained by the above-mentioned carbonization and activation treatment, thereby removing harmful substances in the exhaust gas.

Further, in the method of the present invention, at least a part of the exhaust gas from the activated carbonization device cooled by the heat exchange is exhausted before exhausting at least a part of the activated carbide obtained by the carbonization and activation treatment. It is preferable to remove the harmful substances in the exhaust gas by introducing into a filtration type dust collector together with an alkali agent (see FIGS. 1 to 6). Further, in these methods of the present invention, the powdery dry sludge as a raw material of the activated carbide is introduced into an activated carbonization apparatus of an indirect heating system,
The moisture in the dried sludge is evaporated before the carbonization treatment, and then the dried sludge is thermally decomposed and carbonized, and the carbonized sludge is removed by the steam generated in the previous stage of the carbonization treatment and the carbon dioxide gas generated during the pyrolysis. Preferably, the activated carbon is produced by an activation treatment.

The sludge carbonization apparatus of the present invention conveys powdery dry sludge circulated after being separated into solid and gas by a solid-gas separator, and mixes the powdery dry sludge with a sludge dewatering cake. Further conveying and mixing and supplying means for supplying the dried sludge mixture to the crusher of the flash drying device, and for extracting and storing a part of the powdery dried sludge which is conveyed and circulated by the mixing and supplying means. A part of the high temperature exhaust gas from the activated carbonization device as a heat source for flash drying together with the dry powder hopper provided in communication with the upper part of the mixing and feeding means and the dry sludge mixture from the mixing and feeding means is supplied to the airflow from the solid-gas separator. A part of the dried exhaust gas is mixed and supplied to a crusher, and the dried sludge mixture is crushed (crushed) by the crusher and dried with hot air, and the obtained powdery dried sludge is further dried with hot air by a flash drying tube. Flash drying device and flash drying device A solid-gas separator for introducing an air stream containing powdery dry sludge from the tank into powdery dry sludge and flash drying exhaust gas, and drying of the powdery form taken out from the dry powder hopper An activated carbonizer for producing activated carbide by carbonizing and activating sludge, and a solid-gas separator for the remaining high-temperature exhaust gas from the activated carbonizer that supplied part of the high-temperature exhaust gas to the crusher as a heat source for flash drying Heat exchanger for heat exchange with the rest of the flash drying exhaust gas from the furnace, and means for introducing the flash drying exhaust gas to the activated carbonization device to thermally deodorize the remaining flash drying exhaust gas heated by the heat exchanger (See FIG. 1).

Further, the apparatus of the present invention conveys powdery dry sludge which is separated into solid and gas by a solid-gas separator and circulates, mixes the powdery dry sludge with a sludge dewatering cake and further conveys it. A mixing and supplying means for supplying the dried sludge mixture to a crusher of a flash drying apparatus; and a mixing and supplying means for extracting and storing a part of the powdery dried sludge conveyed and circulated by the mixing and supplying means. A part of the hot exhaust gas from the activated carbonization device as a heat source for flash drying together with the dry powder hopper provided in communication with the upper part of the means and the dry sludge mixture from the mixing and feeding means Of the dried sludge mixture is crushed (crushed) by a crusher and dried with hot air, and the resulting powdery dried sludge is further dried with hot air by a flash dryer. Drying equipment;
A solid-gas separator for introducing an air flow containing powdery dry sludge from a flash drying device to separate the powdery dry sludge and a flash drying exhaust gas containing steam generated in the drying process; Activated carbonizer for producing activated carbide by carbonizing and activating powdery dried sludge taken out from body hopper, and activated carbonizer that supplies part of high-temperature exhaust gas to crusher as heat source for flash drying A heat exchanger for exchanging heat with the rest of the flash exhaust gas from the solid-gas separator for heat exchange with the rest of the high-temperature exhaust gas from the solid-gas separator, and supplying and washing the water with the remainder of the flash exhaust gas containing steam heated by the heat exchanger It is characterized by including a flush scrubber for dehumidifying, and a flash drying flue gas introducing means for introducing dry flue gas from the flush scrubber into an activated carbonization device for thermal decomposition and deodorization (FIG. 2). reference)

Further, the apparatus of the present invention conveys powdery dry sludge which is separated into solid and gas by a solid-gas separator and circulates, mixes the powdery dry sludge with a sludge dewatering cake, and further conveys it. A mixing and supplying means for supplying the dried sludge mixture to a crusher of a flash drying apparatus; and a mixing and supplying means for extracting and storing a part of the powdery dried sludge conveyed and circulated by the mixing and supplying means. A dry powder hopper provided in communication with the upper part of the means, together with the dry sludge mixture from the mixing and supply means, and a part of the flash drying exhaust gas from the solid-gas separator as a heat source for flash drying is activated carbonized by a heat exchanger. Heat exchange with the high temperature exhaust gas from the furnace, heat it and supply it to the crusher, pulverize (crush) the dried sludge mixture with the crusher and dry it with hot air, and further dry the obtained powdery dry sludge with a flash drying tube. Flash drying device for hot air drying and flash drying A solid-gas separator for introducing an air stream containing powdery dry sludge from the device to separate the powdery dry sludge and flash-dry exhaust gas, and the powdery gas extracted from the dry powder hopper An activated carbonizer for producing activated carbide by carbonizing and activating dry sludge, and a heat exchanger for exchanging heat from high-temperature exhaust gas from the activated carbonizer with a part of flash drying exhaust gas from a solid-gas separator. And a means for introducing a flash drying exhaust gas for introducing the remaining flash gas drying exhaust gas from the solid-gas separator into the activated carbonization device for thermal decomposition and deodorization (see FIG. 3).

Further, the apparatus of the present invention conveys powdery dry sludge which is separated into solid and gas by a solid-gas separator and circulates, mixes the powdery dry sludge with a sludge dewatering cake, and further conveys it. A mixing and supplying means for supplying the dried sludge mixture to a crusher of a flash drying apparatus; and a mixing and supplying means for extracting and storing a part of the powdery dried sludge conveyed and circulated by the mixing and supplying means. A dry powder hopper provided in communication with the upper part of the means, together with the dry sludge mixture from the mixing and supply means, and a part of the flash drying exhaust gas from the solid-gas separator as a heat source for flash drying is activated carbonized by a heat exchanger. Heat exchange with the high temperature exhaust gas from the furnace, heat it and supply it to the crusher, pulverize (crush) the dried sludge mixture with the crusher and dry it with hot air, and further dry the obtained powdery dry sludge with a flash drying tube. Flash drying device for hot air drying and flash drying A solid-gas separator for introducing an air stream containing powdery dry sludge from the device into a powdery dry sludge and a gas stream drying exhaust gas containing steam generated in the drying process, and a dry powder hopper Activated carbonizer for producing activated carbide by carbonizing and activating the powdery dried sludge taken out from the plant, and a portion of the high-temperature exhaust gas from the activated carbonizer to the flash drying exhaust gas from the solid-gas separator. A heat exchanger for heat exchange, a flush scrubber for supplying the remainder of the flash drying exhaust gas containing water vapor from the solid-gas separator to wash and dehumidify the water, and heat the drying exhaust gas from the flush scrubber to heat. A flash drying exhaust gas introduction means for introducing into a activated carbonization device for decomposing and deodorizing is provided (see FIG. 4).

Further, the apparatus of the present invention conveys powdery dry sludge which is separated into solid and gas by a solid-gas separator and circulates, mixes the powdery dry sludge with a sludge dewatering cake, and further conveys it. A mixing and supplying means for supplying the dried sludge mixture to a crusher of a flash drying apparatus; and a mixing and supplying means for extracting and storing a part of the powdery dried sludge conveyed and circulated by the mixing and supplying means. A dry powder hopper provided in communication with the upper part of the means, together with the dry sludge mixture from the mixing and supply means, and a part of the flash drying exhaust gas from the solid-gas separator as a heat source for flash drying is activated carbonized by a heat exchanger. Heat exchange with the high temperature exhaust gas from the furnace, heat it and supply it to the crusher, pulverize (crush) the dried sludge mixture with the crusher and dry it with hot air, and further dry the obtained powdery dry sludge with a flash drying tube. Flash drying device for hot air drying and flash drying A solid-gas separator for introducing an air stream containing powdery dry sludge from the device to separate the powdery dry sludge and flash-dry exhaust gas, and the powdery gas extracted from the dry powder hopper An activated carbonizer for producing activated carbide by carbonizing and activating dry sludge, and a heat exchanger for exchanging heat from high-temperature exhaust gas from the activated carbonizer with a part of flash drying exhaust gas from a solid-gas separator. And an exhaust gas introducing means for introducing the remaining portion of the flash dried exhaust gas from the solid-gas separator into the activated carbonization device for pyrolysis and deodorization, and a part of the exhaust gas from the activated carbonization device cooled by the heat exchanger. And an active carbonization device exhaust gas introduction means for introducing the remaining portion of the flash drying exhaust gas from the solid-gas separator together with the activated carbonization device (see FIG. 5).

The apparatus of the present invention conveys powdery dry sludge which is separated into solid and gas by a solid-gas separator and circulates, mixes the powdery dry sludge with a sludge dewatering cake, and further conveys it. A mixing and supplying means for supplying the dried sludge mixture to a crusher of a flash drying apparatus; and a mixing and supplying means for extracting and storing a part of the powdery dried sludge conveyed and circulated by the mixing and supplying means. A dry powder hopper provided in communication with the upper part of the means, together with the dry sludge mixture from the mixing and supply means, and a part of the flash drying exhaust gas from the solid-gas separator as a heat source for flash drying is activated carbonized by a heat exchanger. Heat exchange with the high temperature exhaust gas from the furnace, heat it and supply it to the crusher, pulverize (crush) the dried sludge mixture with the crusher and dry it with hot air, and further dry the obtained powdery dry sludge with a flash drying tube. Flash drying device for hot air drying and flash drying A solid-gas separator for introducing an air stream containing powdery dry sludge from the device into a powdery dry sludge and a gas stream drying exhaust gas containing steam generated in the drying process, and a dry powder hopper Activated carbonizer for producing activated carbide by carbonizing and activating the powdery dried sludge taken out from the plant, and a portion of the high-temperature exhaust gas from the activated carbonizer to the flash drying exhaust gas from the solid-gas separator. A heat exchanger for heat exchange, a flush scrubber for supplying the remainder of the flash drying exhaust gas containing water vapor from the solid-gas separator to wash and dehumidify the water, and heat the drying exhaust gas from the flush scrubber to heat. Exhaust gas introduction means for introduction into the activated carbonizer to decompose and deodorize, and a part of the exhaust gas from the activated carbonizer cooled by the heat exchanger together with dry exhaust gas washed and dehumidified by a washing scrubber. Costume Is characterized in that it comprises an activated carbon apparatus exhaust gas introducing means for introducing a (see FIG. 6).

In the above-described apparatus of the present invention, the active means for injecting a part of the activated carbide produced by the activated carbonization apparatus into the exhaust means for exhausting the exhaust gas from the activated carbonization apparatus cooled by the heat exchanger. Providing a carbide blowing means and an alkali blowing means for blowing an alkali agent, and connecting a filtration type dust collector into which exhaust gas into which the activated carbide and the alkali agent have been blown is introduced to the exhaust means; It is preferable to form a coating layer of activated carbide and an alkaline agent on the filter of the vessel to remove harmful substances in the exhaust gas (see FIGS. 1 to 6). In the above-described apparatus of the present invention, the activated carbonization apparatus is configured to indirectly heat powdery dry sludge supplied from the dry powder hopper, and the upstream side in the moving direction of the dry sludge is the dry sludge. This is a low-temperature drying zone for evaporating water, and becomes a carbonization zone for thermally decomposing and carbonizing the dry sludge as it proceeds in the moving direction of the dry sludge. It is preferable to adopt a configuration in which a high-temperature activation zone for activating sludge carbonized by carbon dioxide gas generated in the carbonization zone is provided.

[0020]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below, but the present invention is not limited to the following embodiments and can be implemented with appropriate modifications. FIG. 1 shows a sludge carbonization apparatus according to a first embodiment of the present invention. In the present embodiment, a bag filter is used as a filtration type dust collector, a cyclone is used as a solid-gas separator, and sewage sludge is used as sludge to be treated. In addition to the sewage sludge, it is also possible to use human waste sludge, livestock waste, waste from various industrial wastewaters, and the like. As shown in FIG. 1, a sludge hopper (not shown)
The sewage sludge dewatered cake stored in the inside of the
The sewage sludge is supplied to the mixing / transporting means 12 in the inside, and is mixed with the circulating dry powder of sewage sludge (hereinafter, dried sludge) transported by the transporting means 14 of the mixing / supplying device 10. Here, the mixing ratio of the dried sludge to the sludge dewatered cake is 10 to 10 in terms of dry weight ratio.
It is 500 times, desirably 50 to 200 times, whereby the drying speed in a flash dryer described later can be greatly improved. The mixing / transporting means 12 has a structure having both a mixing function and a transport function, and for example, a screw feeder or the like is used. Also, the transporting means 14
For example, a screw feeder having the same drive shaft as the mixing / transporting means 12 is used.

A part of the powdery dry sludge conveyed by the conveying means 14 in the mixing and feeding device 10 is stored in a dry powder hopper 16 provided in communication with the upper side of the mixing and feeding device 10. On the other hand, as mentioned above, most dry sludge is mixed and
The mixture with the sludge dewatered cake is further conveyed by the conveying means 12. The dried sludge mixture transported by the mixing / transporting means 12 is introduced into a crusher 20 of a flash dryer 18. A heated gas obtained by mixing a part of the high-temperature exhaust gas discharged from the activated carbonization furnace described later with the dry exhaust gas from the cyclone is introduced into the crusher 20 as a heat source for drying. The powdery dried sludge finely pulverized by the crusher 20 and dried by hot air is transported by airflow through the airflow drying pipe 22 of the airflow dryer 18 and further hot-air dried. The airflow (dry exhaust gas) containing the powdery dry sludge from the airflow drying pipe 22 is separated into solid and gas by the cyclone 24, and the powdery dry sludge is supplied to the conveying means 14 of the mixing and feeding device 10. The drying exhaust gas separated by the cyclone 24 will be described later.

The powdery dry sludge stored in the above-mentioned dry powder hopper 16 is carried out of the dry powder hopper 16 by a dry powder carry-out means 26 such as a screw feeder, and passes through a dry powder storage tank 28. Then, the raw material is fed into a casing 34 of a screw conveyor provided in an activated carbonization furnace 32 by a feeder 30 such as a rotary feeder. Activated carbonization furnace 3
The powdery dry sludge introduced into the second casing (cylindrical tube) 34 moves in the casing 34 by a screw conveyor 36 provided in the casing 34, and is indirectly transferred by a combustion gas (hot air) from a burner 38. Heated.
The burner 38 is supplied with fuel and combustion air. In this case, as the structure of the activated carbonization furnace 32, it is preferable that the flow of the sludge and the pyrolysis gas and the like in the casing 34 be co-current. Thereby, the upstream side in the casing 34 becomes a low-temperature drying zone for evaporating moisture in the dried sludge, and becomes a carbonizing zone for pyrolyzing and drying the dried sludge as it proceeds in the moving direction of the sludge in the casing 34. The downstream side in the casing 34 becomes a high-temperature activation zone for activating sludge carbonized by steam generated in the drying zone and carbon dioxide generated in the carbonization zone.
In order to create the above flow, an exhaust port for pyrolysis gas or the like is not provided in the casing 34, or an exhaust port is provided only in the activation zone. In some cases, the flow of the sludge moving in the casing and the flow of the combustion gas from the burner may be configured to be countercurrent.

The activated carbon which has been carbonized and activated in the activated carbonization furnace 32 is taken out of the casing 34 by a feeder 40 such as a rotary feeder, and a part of the activated carbon is purified by a bag filter described later to purify the exhaust gas from the activated carbonization furnace 32. Used for processing. Also, the remaining activated carbide is used outside the system,
For example, as a substitute for activated carbon, it is effectively used for purifying exhaust gas from garbage incinerators and the like, removing odorous gas from deodorants, removing COD from wastewater, and dehydrating aids for sewage sludge and livestock manure. The activated carbide produced in the activated carbonization furnace 32 as described above has a pore distribution having a large pore size as compared with activated carbon, and high molecular components such as dioxins and odor components in exhaust gas. It is suitable for adsorption and adsorption in liquid phase components.

A part of the high-temperature exhaust gas discharged from the activated carbonization furnace 32 is mixed with a part of the dry exhaust gas discharged from the cyclone 24 through the exhaust gas fan 42, and the flash dryer 18 is used as a flash drying heat source. Is introduced into the crusher 20. The remainder of the high-temperature exhaust gas discharged from the activated carbonization furnace 32 is introduced into a heat exchanger 44, where the cyclone 2
Heat exchange with the rest of the dried exhaust gas from
The exhaust gas from 2 is cooled. 46 and 48 are control dampers. The dried exhaust gas from the cyclone 24 that has been heated by heat exchange in the heat exchanger 44 is introduced to the outside of the casing 34 in the activated carbonization furnace 32, and is directly heated by the combustion gas (hot air) from the burner 38 and is contained in the gas. Odor components are thermally decomposed.

The activated carbonization furnace 32 cooled by the heat exchanger 44
Is introduced into the bag filter 52 via the attraction fan 50. At this time, a part of the activated carbon produced in the activated carbonization furnace 32 and an alkali agent such as slaked lime are blown into the flue on the inlet side of the bag filter 52, and the activated carbon and the alkaline A coating layer of an alkali agent is formed, whereby harmful substances such as dioxins, acidic gas components such as SOx, and heavy metals in the exhaust gas of the activated carbonization furnace are removed by adsorption and reaction. The activated carbonization furnace exhaust gas purified by the bag filter 52 is discharged out of the system. 56 is a feeder such as a rotary feeder for removing a part of the activated carbide, and 58 is
It is a blower for blowing activated carbide. In addition, in addition to slaked lime, quick lime, Mg (OH)
_2. MgO or the like is used, and the alkaline agent is blown in powder or slurry form. Further, the activated carbide and the alkali agent may be blown together or separately. Further, in FIG. 1, the activated carbon or the like is blown into the flue on the inlet side of the bag filter 52, but the activated carbon or the like may be blown into the bag filter 52 body. It is also possible to provide a bag filter in two stages in series, and to add an activated carbon and / or an alkali agent to the flue at the inlet of the second stage bag filter or to the bag filter body. Furthermore, instead of the second-stage bag filter, NaO
It is also possible to provide a wet gas cleaning device of a type that supplies and circulates and sprays an absorbing solution such as an H aqueous solution.

FIG. 2 shows a sludge carbonization apparatus according to a second embodiment of the present invention. In the present embodiment, of the flash drying exhaust gas separated by the cyclone 24, the flash drying exhaust gas heated by heat exchange with the high temperature exhaust gas from the activated carbonization furnace 32 in the heat exchanger 44 is supplied to the water scrubber 60. After supplying, washing and dehumidifying, the dried exhaust gas is introduced to the outside of the casing 34 in the activated carbonization furnace 32, and is directly heated by the combustion gas (hot air) from the burner 38 to thermally decompose the odor component in the gas. It was made. The flash drying exhaust gas contains water vapor generated in the drying process in the flash drying device 18. The flash drying exhaust gas is introduced into a scrubber 60 of a washing type, and water is sprayed from a spray nozzle of the scrubber 60. Thereby, the water vapor contained in the exhaust gas is condensed and the exhaust gas can be dehumidified, and the exhaust gas can be washed. It should be noted that another wet exhaust gas cleaning device can be used instead of the water-washing type scrubber. Other configurations and operations are the same as those in the first embodiment.

FIG. 3 shows a sludge carbonization apparatus according to a third embodiment of the present invention. In this embodiment, as a flash drying heat source to be supplied to the crusher 20 of the flash dryer 18, a part of the flash drying exhaust gas from the cyclone 24 is heated and used by the high temperature exhaust gas from the activated carbonization furnace 32. It is. That is, a part of the flash drying exhaust gas from the cyclone 24 is introduced into the heat exchanger 44, where the activated carbonization furnace 3
Heat exchange with the high temperature exhaust gas from 2 to heat the dry exhaust gas,
This heated air is introduced into the crusher 20 of the flash dryer 18. The remaining portion of the flue gas discharged from the cyclone 24 is introduced to the outside of the casing 34 in the activated carbonization furnace 32 and is directly heated by the combustion gas (hot air) from the burner 38 to thermally decompose the odor component in the gas. . A part of the flash drying exhaust gas introduced into the activated carbonizing furnace 32 can be mixed with the heated flash drying exhaust gas and introduced into the crusher 20 of the flash dryer 18 as a flash drying heat source. Other configurations and operations are the same as those in the first embodiment.

FIG. 4 shows a sludge carbonization apparatus according to a fourth embodiment of the present invention. In this embodiment, as a flash drying heat source to be supplied to the crusher 20 of the flash dryer 18, a part of the flash drying exhaust gas from the cyclone 24 is heated and used by the high temperature exhaust gas from the activated carbonization furnace 32. It is. That is, a part of the flash drying exhaust gas from the cyclone 24 is introduced into the heat exchanger 44, where the activated carbonization furnace 3
Heat exchange with the high temperature exhaust gas from 2 to heat the dry exhaust gas,
This heated air is introduced into the crusher 20 of the flash dryer 18. Further, in the present embodiment, after the remaining portion of the gas-flow drying exhaust gas from the cyclone 24 is supplied to the water-washing type scrubber 60 for washing and dehumidification, the drying exhaust gas is introduced to the outside of the casing 34 in the activated carbonization furnace 32. ,
The odor component in the gas is thermally decomposed by direct heating by the combustion gas (hot air) from the burner 38.
Other configurations and operations are the same as those in the first, second, and third embodiments.

FIG. 5 shows an apparatus for carbonizing sludge according to a fifth embodiment of the present invention. In this embodiment, as a flash drying heat source to be supplied to the crusher 20 of the flash dryer 18, a part of the flash drying exhaust gas from the cyclone 24 is heated and used by the high temperature exhaust gas from the activated carbonization furnace 32. It is. That is, a part of the flash drying exhaust gas from the cyclone 24 is introduced into the heat exchanger 44, where the activated carbonization furnace 3
Heat exchange with the high temperature exhaust gas from 2 to heat the dry exhaust gas,
This heated air is introduced into the crusher 20 of the flash dryer 18. Further, in the present embodiment, a part of the exhaust gas from the activated carbonization furnace 32 that has been cooled by heat exchange in the heat exchanger 44 is used together with the remaining portion of the flash drying exhaust gas from the cyclone 24 in the casing in the activated carbonization furnace 32. The odor component is introduced directly outside by a combustion gas (hot air) from a burner 38 to thermally decompose odor components in the gas. Other configurations and operations are the same as those in the first and third embodiments.

FIG. 6 shows an apparatus for carbonizing sludge according to a sixth embodiment of the present invention. In this embodiment, as a flash drying heat source to be supplied to the crusher 20 of the flash dryer 18, a part of the flash drying exhaust gas from the cyclone 24 is heated and used by the high temperature exhaust gas from the activated carbonization furnace 32. It is. That is, a part of the flash drying exhaust gas from the cyclone 24 is introduced into the heat exchanger 44, where the activated carbonization furnace 3
Heat exchange with the high temperature exhaust gas from 2 to heat the dry exhaust gas,
This heated air is introduced into the crusher 20 of the flash dryer 18. Further, in the present embodiment, the remaining portion of the flash drying exhaust gas from the cyclone 24 is supplied to the scrubber 60 of a washing type to be washed with water and dehumidified, and the dried exhaust gas is cooled by heat exchange in the heat exchanger 44. A part of the exhaust gas from the activated carbonization furnace 32 is introduced into the outside of the casing 34 in the activated carbonization furnace 32 and directly heated by the combustion gas (hot air) from the burner 38 to thermally decompose the odor component in the gas. It was made. Other configurations and operations are the same as those in the first to fifth embodiments.

[0031]

As described above, the present invention has the following effects. (1) Sludge such as sewage sludge is dried by a flash dryer, and the obtained powdery dried sludge is carbonized and activated by an activated carbonizer, whereby an activated carbide having high adsorption performance can be produced. . (2) As a flash drying heat source, flash drying exhaust gas heat recovered from the exhaust gas of the activated carbonization device or / and direct activated carbonization device exhaust gas can be used. (3) By introducing the flash dried exhaust gas into the activated carbonization device, the odor components in the dried exhaust gas are thermally decomposed, and the flash dried exhaust gas can be deodorized. (4) When the flash drying exhaust gas is supplied to a scrubber of a washing type to perform washing and dehumidification, the heat efficiency is further increased. (5) The activated carbide produced by the activated carbonization device can be used for the purification treatment of the activated carbonization device exhaust gas. Specifically, by introducing the obtained activated carbon and an alkali agent such as slaked lime into a filter-type dust collector such as a bag filter together with the exhaust gas from the activated carbon device, acidity such as dioxins and SOx in the exhaust gas is introduced. Harmful substances such as gas components and heavy metals can be removed by adsorption or reaction. (6) In the case of using an activated carbonization device in which the upstream side in the moving direction of the sludge is the drying zone and then the carbonization zone, and the downstream side in the moving direction of the sludge is the activation zone, the activated carbonized water is generated in the steam generated in the drying zone and the carbonized zone. Carbon dioxide,
It can be used for the activation reaction of carbide in the activation zone. (7) Sludge waste volume can be reduced and waste can be used effectively.

[Brief description of the drawings]

FIG. 1 is a systematic schematic configuration diagram showing a sludge carbonization apparatus according to a first embodiment of the present invention.

FIG. 2 is a systematic schematic configuration diagram showing an apparatus for carbonizing sludge according to a second embodiment of the present invention.

FIG. 3 is a systematic schematic configuration diagram showing a sludge carbonization apparatus according to a third embodiment of the present invention.

FIG. 4 is a systematic schematic configuration diagram showing a sludge carbonization apparatus according to a fourth embodiment of the present invention.

FIG. 5 is a systematic schematic configuration diagram showing a sludge carbonization apparatus according to a fifth embodiment of the present invention.

FIG. 6 is a systematic schematic configuration diagram showing a sludge carbonization apparatus according to a sixth embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 10 mixing / supplying machine 12 mixing / transporting means 14 transporting means 16 dry powder hopper 18 flash drying machine 20 crusher 22 flash drying tube 24 cyclone 26 dry powder discharging means 28 dry powder storage tanks 30, 40, 56 feeding machine 32 activated carbon Gasifier 34 Casing 36 Screw conveyor 38 Burner 42 Exhaust gas fan 44 Heat exchanger 46, 48 Control damper 50 Induction fan 52 Bag filter 54 Filter cloth 58 Blower 60 Water-washing scrubber

────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroshi Kuroda 1-3-1 Higashikawasakicho, Chuo-ku, Kobe Kawasaki Heavy Industries, Ltd. Kobe Head Office (56) References JP-A-11-11922 (JP, A) JP-A-7-242408 (JP, A) JP-A-2-293100 (JP, A) Jikken Sho 45-14388 (JP, Y1) (58) Fields investigated (Int. Cl. ⁷ , DB name) C01B 31 / 02-31/08 C02F 11/00 C02F 11/18 C02F 11/12 C10B 53/00-53/02

Claims (16)

(57) [Claims] 1. A sludge dewatered cake is mixed with a circulating dried sludge from a flash drying device, and the dried sludge mixture is pulverized by a pulverizer of a flash drying device and dried with hot air to obtain a powdery dried sludge. After further drying with hot air in a flash drying tube of a flash drying device, an airflow containing powdery dry sludge is introduced into a solid-gas separator to separate into powdery dry sludge and flash-drying exhaust gas. Most of the dry sludge is mixed with the sludge dewatered cake as circulating dry sludge, and the remaining powdery dry sludge obtained by repeating the circulation is introduced into the activated carbonization device, where it is carbonized and activated to form activated carbon. Manufacture and mix a part of the flash drying exhaust gas from the solid-gas separator with a part of the high temperature exhaust gas from the activated carbonization device and supply it as a heat source for flash drying to the crusher of the flash drying device. Flash drying of the rest of the hot exhaust gas from a solid-gas separator The high-temperature exhaust gas is cooled and exhausted by heat exchange with the rest of the exhaust gas, and the remainder of the flash dried exhaust gas heated by the heat exchange is introduced into the activated carbonization device to thermally decompose the odor components in the dried exhaust gas. Sludge carbonization method. 2. A sludge dewatering cake is mixed with the circulating dried sludge from the flash drying device, and the dried sludge mixture is pulverized by a pulverizer of the flash drying device and dried with hot air to obtain a powdery dried sludge. After further hot-air drying with the flash drying tube of the flash drying device, the air flow containing the powdery dry sludge is introduced into the solid-gas separator, and the flash drying containing the powdery dry sludge and the steam generated in the drying process It is separated into exhaust gas and most of the powdery dried sludge is mixed with the sludge dewatered cake as circulating dried sludge,
The remaining powdery dry sludge obtained by repeating the circulation is introduced into an activated carbonization device, where it is activated and carbonized to produce activated carbide, and a portion of the gas-flow dried exhaust gas from the solid-gas separator is activated carbonized. Mixed with a part of the high-temperature exhaust gas from the furnace and supplied as a heat source for flash-drying to the crusher of the flash dryer, where the remaining high-temperature exhaust gas from the activated carbonizer is exchanged with the remaining flash-dry exhaust gas from the solid-gas separator. To cool and exhaust the hot exhaust gas,
The remaining part of the flash drying exhaust gas containing steam heated by heat exchange is supplied to a washing scrubber, washed and dehumidified, and then introduced into an activated carbonization device to thermally decompose odor components in the drying exhaust gas. Sludge carbonization method. 3. A sludge dewatering cake is mixed with the circulating dried sludge from the flash drying device, and the dried sludge mixture is pulverized by a pulverizer of the flash drying device and dried with hot air to obtain the powdery dried sludge. After further drying with hot air in a flash drying tube of a flash drying device, an airflow containing powdery dry sludge is introduced into a solid-gas separator to separate into powdery dry sludge and flash-drying exhaust gas. Most of the dry sludge is mixed with the sludge dewatered cake as circulating dry sludge, and the remaining powdery dry sludge obtained by repeating the circulation is introduced into the activated carbonization device, where it is carbonized and activated to form activated carbon. Manufactures and heat-exchanges a part of the flash drying exhaust gas from the solid-gas separator with the high-temperature exhaust gas from the activated carbonization device to heat the flash drying exhaust gas, and uses the heated gas as a heat source for flash drying to crack the flash drying device. And dry it by flash drying from a solid-gas separator. Exhaust gas from the activated carbonizer cooled by exchanging heat with a part of the gas is exhausted, and the remainder of the flash dried exhaust gas from the solid-gas separator is introduced into the activated carbonizer to thermally decompose odor components in the dried exhaust gas. A method of carbonizing sludge. 4. A sludge dewatering cake is mixed with the circulating dried sludge from the flash drying device, and the dried sludge mixture is pulverized by a pulverizer of the flash drying device and dried with hot air to obtain a powdery dried sludge. After further hot-air drying with the flash drying tube of the flash drying device, the air flow containing the powdery dry sludge is introduced into the solid-gas separator, and the flash drying containing the powdery dry sludge and the steam generated in the drying process It is separated into exhaust gas and most of the powdery dried sludge is mixed with the sludge dewatered cake as circulating dried sludge,
The remaining powdery dry sludge obtained by repeating the circulation is introduced into an activated carbonization device, where it is activated and carbonized to produce activated carbide, and a portion of the gas-flow dried exhaust gas from the solid-gas separator is activated carbonized. Heat-exchanges the high-temperature exhaust gas from the air to dry the flash-dry exhaust gas, and supplies the heated gas to the crusher of the flash-drying device as a heat source for flash-drying, and exchanges heat with a part of the flash-dry exhaust gas from the solid-gas separator. The exhaust gas from the activated carbonization device that has been cooled is exhausted, and the remainder of the flash dried exhaust gas containing water vapor from the solid-gas separator is supplied to a water-washing type scrubber, washed with water and dehumidified, and then introduced into the activated carbonization device. Wherein the odor component in the dried exhaust gas is thermally decomposed by thermal decomposition. 5. A sludge dewatering cake is mixed with the circulating dried sludge from the flash drying device, the dried sludge mixture is pulverized by a pulverizer of the flash drying device and dried with hot air, and the obtained powdery dried sludge is dried. After further drying with hot air in a flash drying tube of a flash drying device, an airflow containing powdery dry sludge is introduced into a solid-gas separator to separate into powdery dry sludge and flash-drying exhaust gas. Most of the dry sludge is mixed with the sludge dewatered cake as circulating dry sludge, and the remaining powdery dry sludge obtained by repeating the circulation is introduced into the activated carbonization device, where it is carbonized and activated to form activated carbon. Manufactures and heat-exchanges a part of the flash drying exhaust gas from the solid-gas separator with the high-temperature exhaust gas from the activated carbonization device to heat the flash drying exhaust gas, and uses the heated gas as a heat source for flash drying to crack the flash drying device. And dry it by flash drying from a solid-gas separator. A part of the exhaust gas from the activated carbonizer cooled by exchanging heat with a part of the gas is exhausted, and the remaining part of the flash dried exhaust gas from the solid-gas separator is sent to the activated carbonizer together with the remaining part of the exhaust gas from the activated carbonizer. A method for carbonizing sludge, comprising introducing and thermally decomposing odor components in exhaust gas. 6. A sludge dewatering cake is mixed with the circulating dried sludge from the flash drying device, and the dried sludge mixture is pulverized by a pulverizer of the flash drying device and dried with hot air to obtain a powdery dried sludge. After further hot-air drying with the flash drying tube of the flash drying device, the air flow containing the powdery dry sludge is introduced into the solid-gas separator, and the flash drying containing the powdery dry sludge and the steam generated in the drying process It is separated into exhaust gas and most of the powdery dried sludge is mixed with the sludge dewatered cake as circulating dried sludge,
The remaining powdery dry sludge obtained by repeating the circulation is introduced into an activated carbonization device, where it is activated and carbonized to produce activated carbide, and a portion of the gas-flow dried exhaust gas from the solid-gas separator is activated carbonized. Heat-exchanges the high-temperature exhaust gas from the air to dry the flash-dry exhaust gas, and supplies the heated gas to the crusher of the flash-drying device as a heat source for flash-drying, and exchanges heat with a part of the flash-dry exhaust gas from the solid-gas separator. A part of the exhaust gas from the activated carbonization device cooled and exhausted is exhausted, and the remainder of the flash drying exhaust gas containing water vapor from the solid-gas separator is supplied to a washing scrubber to be washed with water and dehumidified. Characterized in that odor components in the exhaust gas are thermally decomposed by introducing the waste gas into the activated carbon device together with the rest of the exhaust gas from the activated carbon device. 7. The method of claim 1, wherein at least a part of the exhaust gas from the activated carbonization device cooled by the heat exchange is carbonized before being exhausted.
The method for carbonizing sludge according to any one of claims 1 to 6, wherein the activated carbon is introduced into a filter-type dust collector together with a part of the activated carbide obtained by the activation treatment and / or an alkali agent to remove harmful substances in the exhaust gas. . 8. Dry powdery sludge, which is a raw material of activated carbon, is introduced into an activated carbonization device of an indirect heating method, and water in the dried sludge is evaporated at a stage prior to carbonization treatment.
The dried sludge is pyrolyzed and carbonized, and the carbonized sludge is
The method for carbonizing sludge according to any one of claims 1 to 7, wherein the activated carbon is produced by an activation treatment using steam generated in a preceding stage of the carbonizing processing and carbon dioxide generated during pyrolysis. 9. Dry powdery sludge circulated by solid-gas separation by a solid-gas separator and circulated, mixed with this powdery dry sludge and further mixed with a sludge dewatering cake, and further dried. And a mixing and supplying means for supplying the powdery sludge to the crusher of the flash drying device, and a portion of the powdery dry sludge which is conveyed and circulated by the mixing and supplying means and communicates with an upper part of the mixing and supplying means for storing the sludge. Along with the provided dry powder hopper and the dry sludge mixture from the mixing and supplying means, a part of the high-temperature exhaust gas from the activated carbonizer is mixed with a part of the flash-dry exhaust gas from the solid-gas separator as a heat source for flash drying. A flash drying device that pulverizes the dried sludge mixture with a crusher, hot-air-drys the obtained powdered sludge, and further hot-air-drys the obtained powdery sludge with a flash drying tube; and a powder from the flash drying device. Air flow containing dry sludge A solid-gas separator for separation into powdery dry sludge and flash drying exhaust gas by introduction, and carbonization and activation treatment of powdery dry sludge taken out from the dry powder hopper to produce activated carbon To heat exchange the remainder of the high-temperature exhaust gas from the activated carbonizer that supplied part of the high-temperature exhaust gas to the crusher as a heat source for flash drying, with the remainder of the flash-dry exhaust gas from the solid-gas separator. A heat exchanger, and a flash drying exhaust gas introduction means for introducing the activated flash carbonization device to thermally deodorize the remainder of the flash drying exhaust gas heated by the heat exchanger. Carbonization equipment. 10. A powdery dry sludge which is separated by solid-gas separation in a solid-gas separator and circulated, is conveyed, mixed with the powdery dry sludge and a sludge dewatering cake, and further conveyed. And a mixing and supplying means for supplying the powdery sludge to the crusher of the flash drying device, and a portion of the powdery dry sludge which is conveyed and circulated by the mixing and supplying means and communicates with an upper part of the mixing and supplying means for storing the sludge. Along with the provided dry powder hopper and the dry sludge mixture from the mixing and supplying means, a part of the high-temperature exhaust gas from the activated carbonizer is mixed with a part of the flash-dry exhaust gas from the solid-gas separator as a heat source for flash drying. A flash drying device that pulverizes the dried sludge mixture with a crusher, hot-air-drys the obtained powdered sludge, and further hot-air-drys the obtained powdery sludge with a flash drying tube; and a powder from the flash drying device. Airflow containing dry sludge A solid-gas separator for separating into powdery dry sludge and flash drying exhaust gas containing steam generated in the drying process, and carbonize the powdery dry sludge taken out from the dry powder hopper.・ Activated carbonization equipment for producing activated carbides by activation treatment, and the rest of the high-temperature exhaust gas from the activated carbonization equipment that supplied a part of the high-temperature exhaust gas to the crusher as a heat source for flash drying A heat exchanger for exchanging heat with the rest of the drying exhaust gas, a flush scrubber for supplying the rest of the flash drying exhaust gas containing steam heated by the heat exchanger to wash and dehumidify the water, and a scrubber of the flush type A flue gas exhaust gas introducing means for introducing the dried exhaust gas from the wastewater into the activated carbonization device for thermal decomposition and deodorization. 11. A powdery dry sludge which is separated by a solid-gas separator and circulated, is conveyed, and the powdery dry sludge is mixed with a sludge dewatering cake and further conveyed. And a mixing and supplying means for supplying the powdery sludge to the crusher of the flash drying device, and a portion of the powdery dry sludge which is conveyed and circulated by the mixing and supplying means and communicates with an upper part of the mixing and supplying means for storing the sludge. Along with the dry powder hopper provided and the dry sludge mixture from the mixing and feeding means, a part of the flash drying exhaust gas from the solid-gas separator is used as a heat source for flash drying by using a heat exchanger to convert the high temperature exhaust gas from the activated carbonizer into heat. A flash drying device for exchanging, heating and supplying to the crusher, crushing the dried sludge mixture with the crusher and drying with hot air, and further drying the obtained powdery dried sludge with hot air using a flash drying tube; Dry dust from the equipment A solid-gas separator for introducing an air stream containing mud into powdery dry sludge and flash drying exhaust gas, and carbonizing and activating powdery dry sludge taken out from the dry powder hopper. An activated carbonizer for producing activated carbon by heating; a heat exchanger for exchanging high-temperature exhaust gas from the activated carbonizer with a part of flash drying exhaust gas from a solid-gas separator; A sludge carbonization apparatus, comprising: a flash drying flue gas introduction means for introducing the remaining flash flue gas into the activated carbonization apparatus for thermal decomposition and deodorization. 12. A powdery dry sludge which is separated by solid-gas separation in a solid-gas separator and circulated, is conveyed, mixed with the powdery dry sludge and a sludge dewatering cake, and further conveyed. And a mixing and supplying means for supplying the powdery sludge to the crusher of the flash drying device, and a portion of the powdery dry sludge which is conveyed and circulated by the mixing and supplying means and communicates with an upper part of the mixing and supplying means for storing the sludge. Along with the dry powder hopper provided and the dry sludge mixture from the mixing and feeding means, a part of the flash drying exhaust gas from the solid-gas separator is used as a heat source for flash drying by using a heat exchanger to convert the high temperature exhaust gas from the activated carbonizer into heat. A flash drying device for exchanging, heating and supplying to the crusher, crushing the dried sludge mixture with the crusher and drying with hot air, and further drying the obtained powdery dried sludge with hot air using a flash drying tube; Dry dust from the equipment A solid-gas separator for introducing a gas stream containing mud into powdery dry sludge and a gas stream drying exhaust gas containing steam generated in the drying process, and a powdery gas removed from the dry powder hopper. An activated carbonizer for producing activated carbide by carbonizing and activating dry sludge, and a heat exchanger for heat-exchanging high-temperature exhaust gas from the activated carbonizer with a part of the gas-flow dried exhaust gas from a solid-gas separator. And a scrubber of the washing type for supplying the remainder of the flash drying exhaust gas containing water vapor from the solid-gas separator to wash and dehumidify the water, and an activated carbon device for thermally deodorizing the drying exhaust gas from the washing scrubber. A sludge carbonization apparatus, comprising: a flash drying exhaust gas introduction means for introducing the flue gas into the sludge. 13. A powdery dry sludge which is separated by solid-gas separation by a solid-gas separator and circulated, is conveyed, mixed with the powdery dry sludge and a sludge dewatered cake, and further conveyed. And a mixing and supplying means for supplying the powdery sludge to the crusher of the flash drying device, and a portion of the powdery dry sludge which is conveyed and circulated by the mixing and supplying means and communicates with an upper part of the mixing and supplying means for storing the sludge. Along with the dry powder hopper provided and the dry sludge mixture from the mixing and feeding means, a part of the flash drying exhaust gas from the solid-gas separator is used as a heat source for flash drying by using a heat exchanger to convert the high temperature exhaust gas from the activated carbonizer into heat. A flash drying device for exchanging, heating and supplying to the crusher, crushing the dried sludge mixture with the crusher and drying with hot air, and further drying the obtained powdery dried sludge with hot air using a flash drying tube; Dry dust from the equipment A solid-gas separator for introducing an air stream containing mud into powdery dry sludge and flash drying exhaust gas, and carbonizing and activating powdery dry sludge taken out from the dry powder hopper. An activated carbonizer for producing activated carbon by heating; a heat exchanger for exchanging high-temperature exhaust gas from the activated carbonizer with a part of flash drying exhaust gas from a solid-gas separator; Exhaust gas introduction means for introducing the remaining part of the flash drying exhaust gas into the activated carbonization device for thermal decomposition and deodorization, and a part of the exhaust gas from the activated carbonization device cooled by the heat exchanger is supplied to the airflow from the solid-gas separator. An activated carbonization device exhaust gas introduction means for introducing the remaining portion of the dried exhaust gas into the activated carbonization device together with the remaining portion of the dried exhaust gas. 14. A powdery dry sludge which is separated into a solid and a gas by a solid-gas separator and circulated, is conveyed, and the powdery dry sludge is mixed with a sludge dewatering cake and further conveyed. And a mixing and supplying means for supplying the powdery sludge to the crusher of the flash drying device, and a portion of the powdery dry sludge which is conveyed and circulated by the mixing and supplying means and communicates with an upper part of the mixing and supplying means for storing the sludge. Along with the dry powder hopper provided and the dry sludge mixture from the mixing and feeding means, a part of the flash drying exhaust gas from the solid-gas separator is used as a heat source for flash drying by using a heat exchanger to convert the high temperature exhaust gas from the activated carbonizer into heat. A flash drying device for exchanging, heating and supplying to the crusher, crushing the dried sludge mixture with the crusher and drying with hot air, and further drying the obtained powdery dried sludge with hot air using a flash drying tube; Dry dust from the equipment A solid-gas separator for introducing a gas stream containing mud into powdery dry sludge and a gas stream drying exhaust gas containing steam generated in the drying process, and a powdery gas removed from the dry powder hopper. An activated carbonizer for producing activated carbide by carbonizing and activating dry sludge, and a heat exchanger for heat-exchanging high-temperature exhaust gas from the activated carbonizer with a part of the gas-flow dried exhaust gas from a solid-gas separator. And a scrubber of the washing type for supplying the remainder of the flash drying exhaust gas containing water vapor from the solid-gas separator to wash and dehumidify the water, and an activated carbon device for thermally deodorizing the drying exhaust gas from the washing scrubber. Exhaust gas introduction means for introducing into the activated carbonizer, and a part of the exhaust gas from the activated carbonizer cooled by the heat exchanger together with the dry exhaust gas washed and dehumidified by the washing scrubber. Carbonization apparatus sludge characterized in that it comprises a reduction device exhaust gas introducing means. 15. An activated carbide blowing means for injecting a part of the activated carbide produced by the activated carbon device into an exhaust device for exhausting exhaust gas from the activated carbon device cooled by the heat exchanger; An alkaline agent blowing means for injecting the agent, connecting a filtration type dust collector into which the exhaust gas into which the activated carbide and the alkaline agent have been injected is introduced to the exhaust means, and on a filter of the filtration type dust collector The sludge carbonization apparatus according to any one of claims 9 to 14, wherein a harmful substance in the exhaust gas is removed by forming a coating layer of an activated carbide and an alkali agent. 16. An activated carbonization device indirectly heats powdery dry sludge fed from a dry powder hopper, and evaporates moisture in the dry sludge on the upstream side in the moving direction of the dry sludge. Is a low-temperature drying zone, which becomes a carbonization zone for pyrolysis and carbonization of the dried sludge as it proceeds in the moving direction of the dried sludge, and the downstream side in the moving direction of the dried sludge is generated by steam and carbonized zone generated in the drying zone. The sludge carbonization apparatus according to any one of claims 9 to 15, which is a high-temperature activation zone for activating sludge carbonized by the carbon dioxide gas.