JP2913453B2 - Sludge drying equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sludge drying apparatus for heating and drying sludge sludge containing a large amount of water, and more particularly to a sludge sludge containing a large amount of moisture, which is produced by a hot gas generated by a hot gas generator. The present invention relates to a sludge drying apparatus that uses non-contact indirect heating and drying treatment, and burns steam containing a malodorous component vaporized from the sludge during the indirect heating and drying treatment with the above-described hot gas generator to detoxify the sludge. is there.

[0002]

2. Description of the Related Art FIG. 6 shows a typical example of a conventional sludge drying apparatus. Sludge containing a large amount of water is supplied as a cake-like sludge having 70-80% water. The sludge cake is introduced from a feeder 101 through a cake inlet 102 into a rotary kiln dryer 103, where it comes into direct contact with a high-temperature heated gas, and is mixed and swirled to form a stream-dried and granulated material. It is discharged as a more dry granulated solid. On the other hand, the moisture in the sludge cake is vaporized into steam, and reaches the cyclone 106 from the upper outlet 105 of the kiln 103 to separate solids in the steam.
The mixture is mixed with the above-mentioned granulated solid matter on the conveyor 107 and enters the dry solid matter hopper. The mixed gas of the heating gas for drying and the steam, which has been subjected to heat exchange in the kiln 103 and has become low temperature,
Fan 109 and damper 110 from cyclone 106 outlet
Through the inlet 112 from the hot gas generating furnace 111,
The gas recirculated through the kiln 103 and the damper 113
Further, the temperature is increased by heating through a heat exchanger 114 and the deodorizing furnace 115
After the odorous components are made non-polluting by combustion, the temperature is lowered through the heat exchanger 114, and the fuel is branched and discharged from the chimney 116 into the air. On the other hand, the auxiliary fuel is supplied from the fuel storage tank 117 to the hot gas generating furnace 111 via the control valve 118 and the burner 119, and from the control valve 12
0 and the burner 121 are divided into two parts to be used for the deodorizing furnace 115. The air for fuel combustion is
The air blower 122 is supplied to the burner 119 via the damper 123 and the burner 121 via the damper 124, and is supplied in two parts.

[0003]

The components in the sludge containing a large amount of water generally comprise a large amount of organic matter and a small amount of inorganic matter in the fixed matter. Therefore, the malodor components (sulfur compounds, ammonia,
Since various acids and the like are contained in a large amount, pollution-free treatment is required. As described above, the one shown in FIG.
As described in No. 02, direct contact flash drying of sludge and hot air was carried out, and since the exhaust gas contained malodorous components, it could not be discharged from the chimney. Therefore, a deodorizing furnace was provided and high-temperature oxidation of malodorous components in steam was performed. It is necessary to perform combustion, which complicates the system, increases the amount of auxiliary combustion, and additionally installs heat exchange. Further, since both the exhaust gas and the vaporized steam are contained in the cyclone at the kiln exit, the pressure loss is large and the cyclone becomes large. Since high-temperature gas directly contacts the sludge with flash drying, if the drying degree is high, there is a risk of fire or the like, and drying conditions are limited.

[0004] In view of the above problems, the present invention has been made to solve the problems, and an object of the present invention is to convert sludge sludge containing a large amount of water into a hot gas generator. Non-contact indirect heating and drying treatment using the generated high-temperature gas, and steam containing the malodorous component vaporized from the sludge during the indirect heating and drying treatment is burned by the above-mentioned hot gas generator to make it non-polluting, thereby deodorizing. It is an object of the present invention to provide a sludge drying apparatus that can eliminate the need for a furnace, reduce the size of a cyclone by treating only steam vaporized from sludge, and make the sludge that is being dried difficult to burn by indirect heating.

[0005]

SUMMARY OF THE INVENTION In order to achieve the above object, according to the present invention, a dryer body is divided into a sludge drying chamber and a hot gas heating chamber for indirectly heating the sludge drying chamber with a non-contact heating gas. A steam outlet for discharging steam containing a malodorous component vaporized from the sludge at the time of indirect heating is provided at the outlet side of the above-mentioned sludge drying chamber, and hot gas generation for supplying a heating gas to the hot gas heating chamber of the dryer body. A steam passage is provided to feed the hot gas generator with steam containing the malodorous component vaporized from the sludge during indirect heating in the hot gas generator, and one end of the steam passage is provided with steam in the sludge drying chamber. connect to connect to the outlet end side to a steam hot air oven inlet provided in the hot gas generator then co
In addition, the dryer main body is made up of an inner cylinder, an outer cylinder
Outer casing that further houses the outer cylinder that houses the inner and inner cylinders
Between the outer part of the inner cylinder and the inner part of the outer cylinder
The space formed in the sludge drying room is
Formed between the outside of the outer cylinder and the inside of the outer casing.
And a space having the hot gas heating chamber .

Here, the following embodiment is preferable. The inner cylinder, the outer cylinder, and the outer casing are preferably made of a cylindrical body, and the inner cylinder, the outer cylinder, and the outer casing that are made of a cylindrical body are preferably rotatably supported. A plurality of fins are preferably attached to the surface and the outer peripheral surface of the outer cylinder at equal intervals in the circumferential direction.

A swivel lift scraper for scraping off sludge adhering to the wall of the sludge drying chamber is provided in the sludge drying chamber. A plurality of ventilation holes communicating with the inside of the swirl vane are formed on the peripheral surface of the hollow rotary shaft, and a part of the heating gas generated by the hot gas generator is preferably supplied to the inside of the hollow rotary shaft. Furthermore, it is preferable that the rotating shaft attached to the swivel blade of the swivel lift scraper that swivels around the outer periphery of the inner cylinder is eccentrically mounted on the swivel center side and is asymmetrically mounted. A spring is provided to bias the rotation of the swivel lift scraper around the axis of rotation. Preferably provided a stopper for the adjustable Aransu.

[0008] In order to generate a swirling flow in the furnace of the hot gas generator, the steam hot stove inlet is preferably provided eccentrically with respect to the center of the cross section of the furnace of the hot gas generator.

[0009] In order to generate a swirling flow in the furnace of the hot gas generator, it is preferable to provide the recirculating hot stove inlet eccentrically with respect to the center of the cross section of the furnace of the hot gas generator.

[0010]

[0011]

According to the present invention having the above-described structure, in a drying treatment such as domestic sludge containing a large amount of water, the drying apparatus main body and the drying apparatus according to the embodiment are provided in consideration of the above-mentioned problems and means for solving the problems. The following operations can be performed by employing the system.

Since the sludge cake is indirectly heated, it is put into a drying chamber, where it receives radiation and heat transfer from the inner and outer surfaces to vaporize and evaporate the water in the sludge, and is stirred by a swivel lift scraper provided inside. It is discharged from the dryer outlet as a dry granulated solid with low moisture while granulating.

After the vaporized and evaporated water is separated into solids by a cyclone, it is swirled into a high temperature portion of a hot gas generating furnace to oxidize and burn odorous components.

The heating gas for drying passes through the inner cylinder with fins in the center of the dryer and the outer cylinder with fins constituting the outside of the drying chamber.
The sludge is heated indirectly from the dryer outlet by indirect heating of the sludge and discharged. A part of the dry heating gas is supplied to the hot gas generator as a recirculated gas to control the outlet gas temperature.

On the other hand, exhaust gas is released from the chimney into the atmosphere.

The drying hot gas uses a clean fuel such as a city gas as an auxiliary fuel, and the steam supplied is also subjected to high-temperature oxidation for deodorization.

In the control of the drying system, a sludge treatment amount is set by a master control instruction, a sludge input amount and a drying sludge discharge amount are determined, and a hot-blast stove hot gas generation amount is controlled according to inlet and outlet moisture. The air volume is also controlled at the same time.

The gas temperature at the outlet of the hot blast stove is the amount of recirculated gas,
Control.

The amount of sludge held in the drying chamber is controlled by the inclination angle of the dryer and the rotation speed of the swirler.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described more specifically based on embodiments shown in the drawings. FIG. 1 is an overall side view, FIG. 2 is a sectional view of each part, and FIG. 3 is a detailed view.

At the lower part of the sludge receiving hopper 1, a cylindrical sludge feeder 2 is provided obliquely downward. The lower end of the sludge receiving hopper 1 is connected to a sludge feeder 2. The sludge feeder 2 has screw-type feed wings therein, and a sludge feed feeder motor 36 for driving the feed wings is provided outside the slanted upper end of the sludge feeder 2. The sludge supply feeder motor 36 is controlled by the master controller 34 via the signal transmitter 35. A drying sludge inlet 22 is formed on the upper surface of the sludge feeder 2 on the inclined upper end side.

A sludge inlet 3 is provided on the slanted lower end of the sludge feeder 2 so as to be connected downward. The lower part of the sludge inlet 3 is connected to the upper surface on one end side of the dryer main body 4, and is connected to the inside of a dryer sludge drying chamber 60 formed inside the dryer main body 4.

A hot gas generator 12 is provided outside the dryer body 4 on the side of the sludge inlet 3. The hot gas generator 12 has a double structure in which a hot gas generating furnace and a ring-shaped empty space are formed around the outside thereof. As shown in FIG. 2 (D), an air swirling vane 33 is formed around the inlet side of the hot gas generating furnace, and through the air swirling vane 33, the hot gas generating furnace is formed in a ring shape around the outside. Communicates with vacancy.

An outer wall inlet 32 of a combustion stove is connected to an outer wall of a ring-shaped space around the outer periphery of the hot gas generating furnace. The outer wall 32 of the outer wall of the hot blast stove communicates with the atmosphere, and a blower 31 for the combustion and an air control damper 30 for adjusting the inflow of the air upstream of the blower 31 are provided on the way. The auxiliary air control damper 30 is controlled based on information from a master controller 34 and a moisture detector 40 for detecting the moisture of the sludge in the sludge receiving hopper 1.

An auxiliary fuel supply pipe 9, an auxiliary control valve 10, and an auxiliary burner 11 are provided in this order on the outer side of the inlet side of the hot gas generator 12. The combustion control valve 10 is controlled based on information from a master controller 34, a moisture detector 40 for detecting the moisture of the sludge in the sludge receiving hopper 1, and the like.

The steam hot stove inlet 27a is located at a high temperature downstream of the combustion zone on the inlet side of the hot gas generating furnace of the hot gas generator 12.
Is connected. The steam hot stove inlet 27a is shown in FIG.
As shown in (E), the hot gas generator 12 is connected to a position eccentric to the left side of the drawing in the drawing from the center of the hot gas generating furnace, and turns in the direction of rotation (clockwise) of the hot gas (counterclockwise). Around).

A recirculating hot stove inlet 29a is connected to the outlet of the hot gas generating furnace of the hot gas generator 12. As shown in FIG. 2 (F), the recirculating hot air stove inlet 29a is connected to a position eccentric to the right side of the drawing of the hot gas generating furnace of the hot gas generating device 12 in the drawing, and the turning direction of the hot gas. (Clockwise) and the same rotation (clockwise).

A hot gas generating furnace pressure detector 42 is attached to the hot gas generating furnace 12 at the inlet of the hot gas generating furnace, and a hot gas generating furnace outlet temperature detector 4 is provided at the outlet of the hot gas generating furnace.
3 are attached. The hot gas outlet control damper 17 is controlled based on information from the hot gas generating furnace pressure detector 42, and the recirculation gas control damper 28 is controlled based on information from the hot gas generating furnace outlet temperature detector 43.

One end of a hot gas inlet supply pipe 13 is connected to the outside of the hot gas generating furnace 12 on the outlet side of the hot gas generating furnace. The other end of the hot gas inlet supply pipe 13 is connected to a dry hot gas inner cylinder inlet 61 and a dry hot gas outer cylinder inlet 62 of the dryer body 4, and the hot gas generated by the hot gas generator 12 is heated. The dryer body 4 passes through the gas inlet supply pipe 13 and the dry hot gas inner tube inlet 61 and the dry hot gas outer tube inlet 62.
Into the hot gas heating chamber 60a.

On the outlet side of the hot gas heating chamber 60a of the dryer body 4, there are provided a dry hot gas inner cylinder outlet 63 and a dry hot gas outer cylinder outlet 64 which are connected directly to the hot gas heating chamber 60a. I have. One end of the hot gas outlet discharge pipe 14 is connected to the dry hot gas inner tube outlet 63 and the dry hot gas outer tube outlet 64. Hot gas heating chamber 60a of dryer body 4
The low-temperature gas, which has released heat in step (1) and has a low temperature, is discharged to the hot gas outlet discharge pipe 14 through the dry hot gas inner tube outlet 63 and the dry hot gas outer tube outlet 64.

A furnace pressure control damper 15 and a suction blower 16 are provided on the downstream side of the hot gas outlet / discharge pipe 14, and further on the downstream side of the hot gas outlet control damper 1.
7 is provided, the terminal side of which is connected to a chimney 18.

On the outlet side of the sludge drying chamber 60 of the dryer main body 4, the drying sludge solid matter outlet 5 is connected to the lower surface thereof downward, and the drying chamber steam outlet 19 is connected to the upper surface thereof upward. . The dried sludge solids outlet 5 and the drying chamber steam outlet 19 are directly connected to a ring-shaped sludge drying chamber 60 formed inside the dryer body 4.

The lower end of the dry sludge solids outlet 5 is connected to a cylindrical dry sludge feeder 6 provided below the outlet. A drying sludge inlet 23 is connected to a slightly inclined upper surface of the lower portion of the drying sludge feeder 6.
The drying sludge feeder 6 is provided with a screw type feeding blade therein, and a drying sludge outlet feeder motor 38 for driving the feeding blade is provided outside a slightly inclined upper end side of the drying sludge feeding device 6. . The drying sludge outlet feeder motor 38 is controlled by the master controller 34 via the signal transmitter 35. Dry sludge feeder 6
A drying sludge receiving hopper 7 is formed below the slightly inclined upper end side.

A screw-type feed wing is provided below the drying sludge receiving hopper 7, and a receiving hopper outlet feeder motor 39 for driving the feed wing is provided outside the lower portion. A drying sludge discharge port 8 is formed at a lower end of a drying sludge receiving hopper 7 in which a screw type feeding blade is provided. A moisture detector 41 is attached to the drying sludge receiving hopper 7.

One end of a steam passage 27 is connected to the steam outlet 19 of the drying chamber. The other end of the steam passage 27 is connected to a steam hot stove inlet 27 a provided in the hot gas generator 12. This steam passage 27
In the passage for guiding the steam containing the malodorous component vaporized from the sludge during the indirect heating to the hot gas generator 12, the steam enters the hot gas generator 12 through the steam passage 27 and is burned by the hot gas generator 12. Pollution-free treatment,
Thereby, a deodorizing furnace can be made unnecessary.

A drying sludge cyclone 20 is provided in the middle of the steam passage 27. One end of the steam passage 27 on the side that is connected to the steam hot stove inlet 27a is connected to the upper surface of the drying sludge cyclone 20. A steam vent control damper 24, a steam vent blower 25, and a steam vent flow meter-side orifice 26 are provided in the middle of the steam passage 27 downstream of the drying sludge cyclone 20, respectively. The steam vent control damper 24 is controlled by a master controller 34 via a signal transmitter 35.

A drying sludge distributor 21 is connected to a lower portion of the drying sludge cyclone 20. The drying sludge distributor 21 is a device that distributes the drying sludge to the drying sludge input port 22 of the sludge feeding device 2 or the drying sludge input port 23 of the drying sludge feeding device 6, respectively.

The hot gas circulation passage 29 is provided in the sludge drying chamber 6.
0 is a passage for returning a part of the heated gas discharged from the hot gas heating chamber 60 a to the hot gas outlet discharge pipe 14 to the hot gas generator 12 by indirectly heating 0. Some of the discharged heating gas is
By reducing the temperature of the exhaust gas at the furnace outlet by returning to the hot gas generator 12 through the hot gas circulation passage 29, the nitrogen oxides can be reduced. The discharged heating gas releases heat in the sludge drying chamber 60 and changes from high temperature to low temperature. A part of the low-temperature heating gas is returned to the hot gas generation device 12 so that the gas of the hot gas generation device 12 Temperature control is being performed. One end of the hot gas circulation passage 29 is connected to a recirculating hot stove inlet 29 a provided in the hot gas generator 12, and the other end thereof is connected to a downstream portion of the hot gas outlet / discharge pipe 14. The hot gas circulation passage 29 is provided with a recirculation gas control damper 28 in the middle thereof.

The dryer main body 4 is provided with an innermost dryer inner cylinder 5.
5. Outer dryer cylinder 5 inside dryer inner cylinder 55
7, and a triple-cylinder of a dryer outer casing 59 on the outside in which a dryer outer cylinder 57 is provided. In a ring-shaped space between the dryer inner cylinder 55 and the dryer outer cylinder 57, a sludge drying chamber 60 for drying sludge is formed.

Further, the dryer inner cylinder 55 and the dryer outer cylinder 5
A hot gas heating chamber 60a for indirectly heating the sludge drying chamber 60 in a non-contact manner is formed in a ring-shaped space between the dryer 7 and the outer casing 59 of the dryer. The hot gas heating chamber 60a is formed on the inner surface side and the outer surface side of the sludge drying chamber 60,
The sludge drying chamber 60 is heated from both inside and outside. Hot gas is supplied from the hot gas generator 12 to the hot gas heating chamber 60a, and the hot gas heats the sludge drying chamber 60 while flowing toward the outlet side through the hot gas heating chamber 60a.

In the sludge drying chamber 60, a plurality of drying chamber revolving lift scrapers 47 which are long in the direction of the core of the dryer body 4 are provided at equal intervals in the circumferential direction. Both ends of each of the drying chamber revolving type lift scrapers 47 extending in the cylinder core direction are supported by ring-shaped roller bearing carrier devices 48 provided on both ends of the dryer main body 4.

A roller bearing carrier device 48 for supporting both ends of each of the drying chamber revolving type lift scrapers 47 includes:
It is rotatably provided in a ring-shaped space between the dryer inner cylinder 55 and the dryer outer cylinder 57. A plurality of rollers 49 are attached at equal intervals on the inner circumferential side and the outer circumferential side of the roller bearing carrier device 48 that are in contact with the dryer inner cylinder 55 and the dryer outer cylinder 57, and a sealing ring 50 is provided. The sealing ring 50 has a function of sealing a sludge drying chamber 60 formed in a ring-shaped space between the dryer inner cylinder 55 and the dryer outer cylinder 57.

Each of the rotatable roller bearing carrier devices 48 includes a plurality of swivel lifts provided at equal intervals in the circular direction on the inner side surface of a swivel lift scraper drive main gear 51 provided at one end of the dryer body 4. It is connected via a scraper holding lever 53. Further, a pivoting lift scraper retaining spring 54 for urging the pivoting lift scraper retaining lever 53 is attached to each pivoting lift scraper retaining lever 53.

Revolving lift scraper drive main gear 51
On the outer periphery of is provided a revolving lift scraper driving small gear 52 that meshes with this to rotate the main gear 51. This rotary lift scraper driving small gear 5
Reference numeral 2 denotes a motor 37 for rotating the lift of the drying chamber.
The small gear 52 rotates by the driving force of the motor 37 to rotate the revolving lift scraper driving main gear 51, and the roller bearing carrier device 48 connected to the main gear 51 and the drying chamber swivel. The structure is such that the lift lifter 47 is rotated along the outer periphery of the inner tube 55 of the dryer.

Each of the revolving lift scrapers 47 is provided with a rotating shaft 47a parallel to the core direction of the dryer inner tube 55 and the dryer outer tube 57, and the rotating shaft 47a is attached to each roller bearing carrier device 48 on both sides. It penetrates and is rotatably supported, and transmission of rotational force is achieved. Especially,
The rotary shaft 47a supported by the roller bearing carrier device 48 on the side of the rotary lift scraper drive main gear 51
Is fixed to the base end side of the revolving lift scraper holding lever 53 outside the device 48, and the lever 53 rotates integrally with the coaxial 47a about the rotation shaft 47a.

The core of the rotary shaft 47a is mounted eccentrically (for example, L ₁ / L ₂ = 1.5, etc.) on the center side, and both edges of the swivel blade surface of the swivel type lift scraper 47 by centrifugal force due to gravity and rotation. Ends of the outer peripheral surface of the dryer inner cylinder 55 and the dryer outer cylinder 5
7, and a constant force is always given as a sliding force by a revolving lift scraper restraining lever 53 and a revolving lift scraper restraining spring 54 to lift and agitate the sludge in the sludge drying chamber 60. A peeling action is performed to improve the heat transfer effect.

The revolving type lift scraper 47 is capable of rotating forward and backward about a rotating shaft 47a, and has an outer peripheral surface of the dryer inner cylinder 55 and an inner peripheral surface of the dryer outer cylinder 57.
A clearance e between the scraper 47 and both edges of the turning wing surface can be adjusted by arbitrarily adjusting the turning of the turning lever 47 and the rotating shaft 47a by providing a stopper on the turning type lift scraper holding lever 53. You can do it.

When the size is increased, a hollow shaft is adopted as the core of the rotating shaft 47a of the revolving lift scraper 47, and a heating medium is introduced into the inside to improve the heat transfer effect.

The body of the dryer main body 4 includes a dryer inner cylinder 55, a dryer inner cylinder fin 56, and a dryer outer cylinder 5
7 and the sludge drying chamber 6 by the dryer outer tube fins 58.
0 and indirect heating of the sludge to be charged. The dryer inner cylinder fins 56 are radially attached to the inner peripheral surface of the dryer inner cylinder 55 toward the center thereof, and the dryer outer cylinder fins 58 extend outwardly from the outer peripheral surface of the dryer outer cylinder 57. Mounted radially. The fins 56 and 58 attached to the dryer inner cylinder 55 and the dryer outer cylinder 57 are for improving the heat transfer effect.

Further, a porous gas distribution plate 65 is provided in the outer ring-shaped gas passage formed by the dryer outer cylinder 57 and the dryer outer casing 59 to allow a uniform flow of gas.

The dryer body 4 is installed with a slight inclination with respect to the horizontal axis by supporting legs (not shown), and the inclination angle can be changed by a device attached to the supporting legs. Therefore, it is possible to adjust the amount of sludge, the residence time, the granulation particle size, the discharge speed, and the like according to the degree of drying, as well as the rotation speed and clearance of the swivel-type lift scraper 47 built in the sludge drying chamber 60. The dryer body 4 has a dry sludge solid matter outlet 5 at the sludge inlet 3 side.
Slightly higher than the side.

As a safety measure for the dryer body 4 and the hot air generator 12, an N ₂ purge device is installed. N ₂ gas cylinder 44, N ₂ control valve 45, N ₂ purge gas inlet 46 a in the dryer and N ₂ purge gas inlet 4 in the hot gas generating furnace
6b is provided to perform safety by performing an emergency purge at the time of occurrence of an abnormal fire or the like.

Next, the operation based on the configuration of the first embodiment will be described below. Household sludge containing a large amount of water is subjected to primary treatment by a dehydrator (not shown) to 70-80%
Sludge receiving hopper 1 as dewatered cake containing water
It is thrown into. Then, the hopper 1 is introduced into the dryer main body 4 from the sludge inlet 3 through the sludge feeder 2 and mixed with the partially separated dry powder.

The sludge containing a large amount of water introduced into the dryer main body 4 enters the sludge drying chamber 60, and the hot gas heating chambers 60 provided on both inside and outside of the sludge drying chamber 60.
Due to a, the indirect heating is performed by the radiation and heat transfer from the inner and outer surfaces, and the vaporization and evaporation of the moisture are performed to become a dry solid.
This dry solid is stored in the dry sludge receiving hopper 7 through the dry sludge feeder 6 from the dry sludge solid outlet 5 while being granulated by the revolving lift scraper 47. Removed as product.

The auxiliary drying fuel is injected from the auxiliary fuel supply pipe 9 through the auxiliary control valve 10, from the auxiliary burner 11 into the furnace of the hot gas generator 12, and supplied through the auxiliary air swirl vane 33. The high-speed secondary air is agitated and burned to generate high-temperature gas.

In the furnace of the hot gas generator 12, the high-temperature heated gas generated by the high-speed mixing is subjected to the high-temperature mixing of the vaporized steam in the sludge containing the offensive odor component swirled at high speed from the steam hot-blast stove inlet 27a. Oxidizes and makes odorous components non-polluting. At this time, the jet is to give the high-temperature gas swirl direction (clockwise) and reverse swirl (counterclockwise) to enhance the stirring effect.

After the residence time necessary for oxidizing and burning the malodorous components in the steam, the combustion gas is further supplied to the recirculating hot stove inlet 2.
The low-temperature recirculated exhaust gas that is swirled and ejected at a speed higher than 9a is mixed to control the outlet temperature of the furnace of the hot gas generator 12 to a predetermined value (for example, 600 ° C.). The jet direction at this time is further reversed (clockwise) so as to enhance the stirring effect.

The heating high-temperature gas controlled to a predetermined value at the outlet of the furnace of the hot gas generator 12 is supplied to the hot gas inlet supply pipe 13.
The hot gas heating chamber 60 a formed in the inner space of the dryer inner cylinder 55 and the dryer outer cylinder 57 and the dryer outer casing 59 flow through the inner wall 61 of the inner cylinder 61 and the outer cylinder inlet 62 of the dryer. Hot gas heating chamber 6 formed in space
0a.

That is, the heating high-temperature gas passes through the internal space of the dryer inner cylinder 55 and the outer peripheral ring-shaped gas passage constituted by the dryer outer cylinder 57 and the dryer outer casing 59, respectively.
The dryer inner tube fins 56 transfer heat to the dryer inner tube 55, and the dryer outer tube fins 58 transfer heat to the dryer outer tube 57. The high-temperature gas for heating passes through the hot gas heating chamber 60a, and heats the dryer inner cylinder 55 and the dryer outer cylinder 57 to form a ring-shaped sludge drying chamber 60 formed therebetween.
To release the heat to dry the sludge in the sludge drying chamber 60.

The high-temperature gas for heating becomes a low-temperature gas by this heat exchange, and exits from the dry hot gas inner tube outlet 63 and the dry hot gas outer tube outlet 64 on the outlet side of the hot gas heating chamber 60a. Is discharged from a chimney 18 through a hot gas outlet discharge pipe 14, a furnace pressure control damper 15, and a hot gas outlet damper 17 by a suction blower 16.

In this case, since the heating gas heated in the sludge drying chamber 60 does not contain any water vapor containing malodorous components vaporized and evaporated from the sludge, it is not necessary to pass through the deodorizing furnace for deodorizing the malodorous components. For this reason, a deodorizing furnace can be made unnecessary.

On the other hand, it is indirectly heated by a high temperature gas for heating,
In the sludge drying chamber 60, the steam containing a part of the dried solids agitated and vaporized from the sludge by the drying chamber swivel type lift scraper 47 passes through the drying chamber steam outlet 19, and is separated by the dried sludge cyclone 20. Is done.

In this case, since the sludge is indirectly heated, the steam vaporized and evaporated from the sludge does not contain any heating gas for heating.
Since the volume of gas flowing into the apparatus is smaller than that of direct heating, the size of the dry sludge cyclone 20 can be reduced as compared with conventional direct heating.

The dried solids separated by the drying sludge cyclone 20 are mixed by a drying sludge distributor 21, a part of the dried sludge is fed into the sludge feeder 2 by a drying sludge inlet 22, and the others are dried by a drying sludge inlet 23. It is mixed into the feeder 6 and discharged.

The steam separated from the dried solid matter by the drying sludge cyclone 20 passes through a steam vent blower 25 and a steam vent flow meter side orifice 26 from a steam vent control damper 24, and then enters a steam hot stove inlet 27 a of the hot gas generator 12. From the hot gas generator 1
2 is injected into the furnace.

The recirculated gas partially branched from the hot gas outlet / exhaust pipe 14 and flowing into the hot gas circulation passage 29 passes through a recirculation gas control damper 28 and is supplied to the hot gas stove inlet 29 a of the hot gas generator 12. And is injected into the downstream of the furnace of the hot gas generator 12 and used for controlling the gas temperature at the furnace outlet.

Auxiliary fuel combustion air is supplied from the atmosphere through a combustion control air control damper 30, and from a hot gas stove outer wall inlet 32 of the heat gas generator 12 through a combustion gas blower 31 through a combustion gas blower 31. Is heated, a part of the heated air is introduced as primary air from the periphery of the burner burner 11 as ignition stabilizing air, but the majority passes through the burner air swirl vane 33 as secondary air, It is charged into the furnace of the hot gas generator 12 while performing high-speed turning, and mixed with fuel to generate high-temperature combustion gas.

A command is issued from the master controller 34 to control the present drying apparatus system. The signal is sent through a signal transmitter 35 to a sludge supply feeder motor 36, a drying chamber turning type lift scraper rotating motor 37, a drying sludge outlet feeder motor 38, a receiving hopper outlet feeder motor 39, and a combustion control valve 10 And controls the auxiliary air control damper 30.

In addition, the auxiliary fuel is fed back by a signal according to the moisture detector 40 in the sludge receiving hopper 1 and the moisture detector 41 in the dry sludge receiving hopper 7 to feed back control in accordance with the amount of sludge and the accumulated dry moisture. Make sure

The furnace draft of the hot gas generator 12 is controlled by the hot gas generating furnace pressure detector 42 to control the furnace pressure control damper 15 on the inlet side of the suction blower 16 to maintain a constant negative pressure. Hot gas outlet control damper 17
Control to measure the emission of heated gas to the atmosphere.

The gas temperature at the furnace outlet of the hot gas generator 12 is controlled by the recirculating gas control damper 28 by the hot gas generating furnace outlet temperature detector 43 to control the amount of the recirculated gas. The passed low-temperature gas on the outlet side is mixed as a high-speed swirling flow by the recirculating hot-blast stove inlet 29a provided on the furnace outlet side of the hot gas generator 12, and a predetermined furnace outlet temperature of the hot gas generator 12 is maintained. .

The secondary air, steam, and recirculated gas to be charged into the furnace of the hot gas generator 12 are each injected at a high speed in the reverse swirling direction to perform rapid mixing and stirring.

[Second Embodiment] The second embodiment will be described with respect to an apparatus for enlarging the apparatus. The following description of the configuration of the second embodiment will be limited to the differences from the first embodiment. The same components will be denoted by the same reference numerals and description thereof will be omitted. For the components shown in this figure and not particularly designated by reference numerals, refer to the description of the reference numerals. Here, FIG. 4 is an overall side view, and FIG. 5 is a detailed sectional view.

The dryer body 4 has an inlet side 4a, a rotating drum 4
b, outlet side 4c, the inlet side 4a has a sludge inlet 3 and a dry hot gas inner cylinder inlet 61 and a dry hot gas outer cylinder inlet 62 connected to the hot gas inlet supply pipe 13, or these are fixed. Installed. The outlet side 4c has a dry sludge solids outlet 5 and a drying chamber steam outlet 19 and a dry hot gas inner tube outlet 63 and a dry hot gas outer tube outlet 64 connected to the hot gas outlet discharge pipe 14, or Fixedly mounted. The rotating drum 4b is attached to the inlet side 4a and the outlet side 4c via a swinging surface of a plug-in type.

A dryer rotating gear 66 is mounted on the outer peripheral surface of the outer casing 59 of the dryer constituting the outermost part of the rotating drum 4b in the circumferential direction at the center thereof. A dryer rotating small gear 67 that meshes with the dryer rotating gear 66 is mounted in mesh with the outer periphery of the dryer rotating gear 66. The dryer rotating small gear 67 is linked to a dryer driving motor 68, and is rotated by the driving of the dryer driving motor 68 to rotate the rotating drum 4b through the rotation of the dryer rotating gear 66 meshing with the dryer. Let it.

In the circumferential direction of the outer peripheral surface of the dryer outer casing 59 of the rotary drum 4b, the rotary drum support ring 6 having a V-shaped central portion on both sides of the dryer rotary gear 66.
9 are attached. A rotary drum support roller 70 that rotatably supports the rotary drum support ring 69 is provided on the lower surface side of the rotary drum 4b. The rotating drum support roller 70 can support the load of the rotating drum 4b and the thrust of the rotating drum 4b attached at an angle. The rotary drum support roller 70 is rotatably supported by a rotary drum support metal member 71 fixed on a foundation.

The rotational angular velocity ωD of the rotary drum 4b can be rotated so as to have a predetermined adjustable phase difference with the rotational angular velocity ωB of the rotary lift scraper 47.

The swivel blade of the swivel type lift scraper 47 has a hollow double structure as shown in the figure, and a hollow rotary shaft 47b is inserted through the hollow inside of the scraper 47. A plurality of ventilation holes 47c are formed in the peripheral surface of the hollow rotary shaft 47b, and through the ventilation holes 47c, the inside of the hollow rotary shaft 47b and the outside of the rotary blade of the rotary lift scraper 47 outside the rotary shaft 47b. It communicates with the inside. The heating medium passes through the vent hole 47c from the hollow inside of the hollow rotary shaft 47b and passes through the rotary lift scraper 4.
7 can be introduced into the hollow interior of the swirler.

Accordingly, the sludge introduced into the sludge drying chamber 60 is heated through the dryer inner cylinder 55 and the dryer outer cylinder 57 of the hot gas heating chamber 60a, while being lifted and swirled by the swivel lift scraper 47. The scraper 47 is also heated by the heated air of the heating medium introduced into the hollow interior of the swirler of the scraper 47, so that the heating and drying is promoted.

A heating air damper 72, a heating blower 73, and an air heater 74 are provided in the middle of the heating air introduction pipe 75 whose upstream end is opened to the atmosphere in this order from the upstream side. The air heater 74 is connected to the hot gas outlet discharge pipe 1.
4 is a heat exchanger which heats and raises the temperature of air introduced from the atmosphere by using the exhaust heat passing through the inside of the hot gas outlet exhaust pipe 14. Thereby, the heating air is supplied to the heating air damper 72 and the heating blower 73.
After that, the temperature is indirectly heated and increased by the air heater 74.

The downstream end of the heated air introducing pipe 75 is connected to a heated air inlet box 76. The heated air inlet box 76 is attached to the outer peripheral surface on the end side of the dryer inner cylinder 55 on the dry hot gas inner cylinder outlet 63 side via a ring-shaped sliding surface. A heated air inlet side distribution box 77 is attached to the heated air inlet box 76 via an insertion type swing surface. Similarly, the distribution box 77 on the heated air inlet side is attached to the outer peripheral surface of the end of the dryer inner cylinder 55 on the dry hot gas inner cylinder outlet 63 side via a ring-shaped sliding surface. The end of the dryer inner cylinder 55 on the dry hot gas inner cylinder outlet 63 side is rotatable with respect to a heated air inlet box 76 and a heated air inlet side distribution box 77.

Around the heated air inlet side distribution box 77, a doughnut-shaped heated air inlet side distribution header 78 is formed.
Is provided. The heated air inlet side distribution header 78 includes:
A plurality of communication support tubes 78a radially attached at equal intervals to the outer periphery of the heated air inlet side distribution box 77 are supported by the heated air inlet side distribution box 77, and the communication support tubes 78a
Through the heating air inlet side distribution box 77.

One end of a hollow rotary shaft 47b of a revolving lift scraper 47 is connected to one side of the circumferential direction of the heated air inlet side distribution header 78 in a circumferential direction.
7b and the inside of the heating air inlet side distribution header 78 are in communication. Thereby, the air heater 7
The heated air exiting from 4 enters a heated air inlet box 76 via a heated air inlet pipe 75 and a heated air inlet side distribution header 78 via a heated air inlet side distribution box 77, where it is branched into respective swivel lifts. Hollow rotating shaft 47b of scraper 47
Distributed to

A heated air outlet box 81 is mounted on the outer peripheral surface of the dryer inner cylinder 55 on the end side of the dry hot gas inner cylinder inlet 61 side through a ring-shaped sliding surface. One end of a heated air discharge pipe 82 is connected to the heated air outlet box 81. The other end of the heated air discharge pipe 82 is connected to the air-control damper 30 for auxiliary combustion, and the inlet 3
It communicates with 2.

The heating air outlet box 81 is provided with a heating air outlet side distribution box 80 via a swinging surface of a plug-in type. Similarly, the heated air outlet side distribution box 80 is attached to the outer peripheral surface of the end of the dryer inner cylinder 55 on the dry hot gas inner cylinder inlet 61 side via a ring-shaped sliding surface. Dryer inner cylinder 5
5 is rotatable and slidable with respect to the heated air outlet box 81 and the heated air outlet side distribution box 80 on the dry hot gas inner cylinder inlet 61 side.

The heating air outlet side distribution header 79 having a hollow interior and a donut shape is provided around the outer periphery of the heating air outlet side distribution box 80.
Is provided. The heated air outlet side distribution header 79 is
A plurality of communication support tubes 79a radially attached at equal intervals to the outer periphery of the heated air outlet side distribution box 80 are supported by the heated air outlet side distribution box 80, and the communication support tubes 79a
Through the heating air outlet side distribution box 80.

The other end of the hollow rotary shaft 47b of the revolving lift scraper 47 is connected to one side in the circumferential direction of the heated air outlet side distribution header 79.
7b and the inside of the heated air outlet side distribution header 79 are in communication with each other. Thereby, the air heater 7
The heated air exiting from 4 enters a heated air inlet box 76 via a heated air inlet pipe 75 and a heated air inlet side distribution header 78 via a heated air inlet side distribution box 77, where it is branched into respective swivel lifts. Hollow rotating shaft 47b of scraper 47
Distributed to

Then, the high-temperature heating air introduced from the hollow rotary shaft 47b is supplied to the ventilation hole 47 provided in the coaxial 47b.
c into the swirl vanes of the swivel lift scraper 47 and again through the vent hole 47c at the outlet side.
b, through the heated air outlet side distribution header 79, reaches the heated air outlet side distribution box 80 and the heated air outlet box 81, flows down the heated air discharge pipe 82 from the heated air outlet box 81, and outputs the auxiliary air. The air is introduced into the hot gas generating furnace of the hot gas generator 12 from the air swirling vane 33 through the control damper 30, the auxiliary blower 31, and the hot air stove outer wall entrance 32.

The other details of the embodiment are the same as those of the first embodiment, and the description thereof will be omitted.

The sludge drying apparatus having the structure of the first embodiment or the second embodiment has the following features. That is, an indirect heating method is employed, and the hot gas for drying is not mixed with the vaporized water vapor of the sludge. Therefore, if city gas is used as an auxiliary fuel for drying,
Since there is no odor component in the exhaust gas and there is no dust, the exhaust gas system can be simplified.

The water vapor having the malodorous component which has been dried and vaporized is
In the furnace high-temperature section of the hot gas generator 12, high-temperature oxidation of malodorous components is carried out, and it is rendered harmless and mixed into dry gas. Therefore, both the deodorizing furnace and the heat exchanger for reducing the amount of auxiliary combustion as in the conventional art are unnecessary.

The sludge drying chamber 60 is completely isolated from the heated gas side, and performs heat exchange by indirect radiation and heat transfer. In order to improve the heat exchange rate, the hot gas heating chamber 60a
In addition, the fins are welded, and the sludge drying chamber 60 is provided with a swivel type lift scraper 47 for promoting vaporization and evaporation of water vapor from the sludge, thereby improving the heat transfer effect.

The swivel type lift creper 47 is provided with a rotating shaft 47 so as to have an effect of stirring and granulating the sludge fed therein.
The axis of a is decentered (for example, L1 / L2 = 1.5, etc.)
Attached to control the number of rotations, it allows forward and reverse rotation. Further, the rotating shaft 47a may be a hollow rotating shaft as required, and a heating gas may be supplied into the rotating shaft.

The dryer body 4 is capable of adjusting the inclination angle and the angular velocity of the body, as shown in other embodiments, and interacts with the agitating effect of the swivel-type lift scraper 47 to thereby improve the drying degree of the sludge and the granulation effect. Operation can be performed according to the product.

The solids contained in the drying chamber outlet steam are:
Separated in the drying sludge cyclone 20, a part is mixed again into the sludge cake of the sludge drying chamber 60 from the drying sludge inlet 22 to enhance the drying effect, and a part is dried from the drying sludge inlet 23 through the drying sludge feeder 6. And discharged. Further, the gas that has passed through the drying sludge cyclone 20 is only steam, and the heating gas for drying is not mixed. Therefore, the apparatus is downsized and the pressure loss can be appropriately selected. That is, the dry sludge cyclone 20 can be reduced in size by separating solids in steam. Further, the solid collected by the cyclone 20 by the dry sludge cyclone 20 is discharged to both the supply side and the outlet side by the dry sludge distributor 21 to control the degree of drying.

In order to generate a swirling flow in the furnace of the hot gas generator 12, a steam hot stove inlet 27a and a recirculating hot stove inlet 29a are provided eccentrically with respect to the center of the furnace section of the hot gas generator 12, All of the high-speed injected air, steam, and recirculated gas have the reverse swirling direction, and have a mixing and stirring effect.

[0097] This is indirect heating, in which high temperature gas does not directly come into contact with sludge, so that safety is high and drying conditions can be taken high. Further, there is provided a safety device according to N ₂ purge.

The present invention is not limited to the above-described embodiment, and it is needless to say that various modifications can be made without departing from the spirit of the present invention.

[0099]

As is apparent from the above description, according to the sludge drying apparatus of the present invention, indirect heating is performed,
Because the odor components are clean without mixing in the heated exhaust gas,
The exhaust gas system can be simplified. Moreover, the steam having the malodorous component which has been dried and vaporized can be burned by the hot gas generator to oxidize the malodorous component at a high temperature and render it harmless. Therefore, a deodorizing furnace and heat exchange can be made unnecessary. Furthermore, since it is indirect heating, fire and the like do not come into contact with dry powder in the drying chamber, so that it is safe, and high drying conditions can be obtained.

[Brief description of the drawings]

FIG. 1 is a schematic overall mechanism diagram showing a first embodiment of the present invention.

FIG. 2A is a schematic sectional view taken along the line AA of FIG. 1;
(B) is a BB schematic arrow sectional drawing of FIG. FIG. 2C is a schematic cross-sectional view taken along the line CC in FIG. 1. (D) is D in FIG.
It is -D outline arrow sectional drawing. (E) is EE outline arrow sectional drawing of FIG. (F) is an FF schematic arrow cross-sectional view of FIG. 1.

FIG. 3A is a partial detailed view of the first embodiment of the present invention. The left half of (B) is a schematic cross-sectional view taken along the line AA in FIG. The upper right half of (C) is a schematic cross-sectional view taken along the line BB of FIG. 3 (A), and the lower right half is a schematic cross-sectional view taken along the line CC of FIG. 3 (A).

FIG. 4 is a schematic overall mechanism diagram showing a second embodiment of the present invention.

FIG. 5A is a partial detailed view of a second embodiment of the present invention. The right half of (B) is a schematic cross-sectional view taken along the line AA of FIG. 5A, and the left half is a schematic cross-sectional view taken along the line AA of FIG. 5 (A). The upper right half of (C) is a schematic sectional view taken along the line CC of FIG. 5A, and the lower right half is a schematic sectional view taken along the line DD of FIG. 5 (A). FIG. 5D is a schematic sectional view taken along the line EE in FIG.

FIG. 6 is a schematic overall mechanism diagram showing a conventional apparatus.

[Explanation of symbols]

[First Embodiment] Sludge receiving hopper 39. Receiving hopper exit fee 2. Sludge feeder Motor for drier 3. Sludge inlet 40. 4. Moisture detector (Sludge supply 4. Dryer body side) Dry sludge solids outlet 41. 6. Moisture detector (dry sludge 6. Dry sludge feeder outlet side) Drying sludge receiving hopper 42. 7. Hot gas generating furnace pressure detector Dry sludge outlet 43. 8. Detection of outlet temperature of hot gas generating furnace Fuel supply pipe for supporting combustion 10. Control valve for combustion support 44. N ₂ gas cylinder 11. Burner for combustion support 45. N ₂ control valve 12. Hot gas generator 46a. 12. N ₂ purge gas in dryer Hot gas inlet supply pipe inlet 14. Hot gas outlet discharge pipe 46b. N ₂ par in hot gas generating furnace 15. Furnace pressure control damper j Gas inlet 16. Suction blower 47. Swivel lift scraper 17. Hot gas outlet control damper 47a. Rotation axis 18. Chimney 47b. Hollow rotating shaft 19. Drying room steam outlet 47c. Vent hole 20. Dry sludge cyclone 48. Roller bearing carrier 21. Dry sludge distributor device 22. Dry sludge inlet (entrance side) 49. Roller 23. Dry sludge inlet (outlet side) 50. Seal ring 24. Steam vent control damper 51. Swivel lift scraper 25. Steam vent blower Drive main gear 26. Steam vent flow meter side orifice 52. Swivel lift scraper 27. Steam passage drive small gear 27a. Steam hot stove inlet 53. Swivel lift scraper 28. Recirculation gas control damper holding lever 29. Hot gas circulation passage 54. Swivel lift scraper 29a. Recirculating hot stove inlet Suppression spring 30. Air control damper for combustion support 55. Dryer inner cylinder 31. Blower for auxiliary combustion 56. Fin for inner cylinder of dryer 32. Entrance of hot-blast stove outer wall for combustion 57. Dryer outer tube 33. Air swirl vane for combustion support 58. Dryer outer tube fins 34. Master controller 59. Dryer external caging 35. Signal transmitter 60. Sludge drying room 36. Sludge supply feeder motor 60a. Hot gas heating chamber 37. Drying room swivel lift scraper 61. Dry hot gas inner cylinder inlet rotation motor 62. Dryer gas outer cylinder inlet 38. For drying sludge outlet feeder 63. Dryer gas inner cylinder outlet motor 64. Dryer gas outer cylinder outlet 65. Gas distribution plate [Second embodiment] 4a. Dryer body (entrance side) 74. Air heater 4b. Dryer body (rotary drum) 75. Heated air introduction pipe 4c. Dryer body (outlet side) 76. Heated air inlet box 66. Dryer rotating gear 77. Heated air inlet side distribution box 67. Dryer rotating small gear 78. Heated air inlet side distribution header 68. Dryer drive motor 78a. Communication support pipe 69. Rotary drum support ring 79. 70. Heated air outlet side distribution header Rotary drum support roller 79a. Communication support pipe 71. Rotary barrel support hardware 80. Heated air outlet side distribution box 72. Air damper for heating 81. Heated air outlet box 73. Heating blower 82. Heated air discharge pipe [Conventional device] 101. Feeder 113. Damper 102. Cake inlet 114. Heat exchanger 103. Rotary kiln dryer 115. Deodorizing furnace 104. Exit lower part 116. Chimney 105. Upper outlet 117. Fuel storage tank 106. Cyclone 118. Control valve 107. Conveyor 119. Burner 108. Hopper 120. Control valve 109. Fan 121. Burner 110. Damper 122. Blower 111. Hot gas generating furnace 123. Damper 112. Input port 124. damper

Continuation of the front page (72) Inventor Nobuyoshi Morikawa 2-11 Shiraiwa-cho, Isahaya-shi, Nagasaki Prefecture (56) References Japanese Utility Model 2-25100 (JP, U) Jiko 56-48735 (JP, Y2) (58) Field surveyed (Int. Cl. ⁶ , DB name) F26B 21/00 B01D 53/38 B01D 53/81 C02F 11/12 F26B 17/32

Claims (10)

(57) [Claims] A sludge drying chamber and a hot gas heating chamber for indirectly heating the sludge drying chamber with a non-contact heating gas are provided in a dryer main body, and steam containing a malodorous component vaporized from the sludge during indirect heating is provided. A steam outlet for discharging steam is provided on the outlet side of the above-mentioned sludge drying chamber, a hot gas generator for supplying a heating gas to a hot gas heating chamber of the dryer body is provided, and steam containing malodorous components vaporized from the sludge during indirect heating is provided. A steam passage for supplying the hot gas to the hot gas generator is provided so that the steam can be burned by the hot gas generator. One end of the steam passage is connected to the steam outlet of the sludge drying chamber, and the other end is provided to the hot gas generator. Connected to the steam hot stove inlet ,
The above-mentioned dryer body is made up of an inner cylinder,
Three external casings that further house the outer cylinder that houses the cylinder
It consists of a heavy structure, and is formed between the outside of the inner cylinder and the inside of the outer cylinder.
The space formed is a sludge drying room, inside and outside the inner cylinder.
The space formed between the outside of the cylinder and the inside of the outer casing
A sludge drying device, wherein the space is the hot gas heating chamber . 2. The sludge drying apparatus according to claim 1, wherein the inner cylinder, the outer cylinder, and the outer casing are formed of a cylindrical body. 3. The sludge drying apparatus according to claim 1, wherein the inner cylinder, the outer cylinder, and the outer casing formed of a cylindrical body are rotatably supported. 4. The sludge drying apparatus according to claim 1, wherein a plurality of fins are attached to the inner peripheral surface of the inner cylinder and the outer peripheral surface of the outer cylinder at equal intervals in the circumferential direction. 5. A sludge drying chamber which adheres to a wall of the drying chamber.
Swivel lift scraper to scrape sludge
Provided, the internal swirler for swirling lift scraper and hollow, attached by inserting a hollow rotary shaft inside the swirler vane, a plurality of vent holes communicating formed on the peripheral surface of the hollow rotary shaft inside the swirler vane , sludge drying apparatus according to claim 1, wherein the supply part of the heating gas produced in the hot gas generator to the interior of the hollow rotary shaft. 6. The sludge drying chamber is attached to the wall of the drying chamber.
Swivel lift scraper to scrape sludge
Provided, the rotation shaft attached to swirler of pivotal lift scraper pivoting the outer periphery of the inner cylinder, sludge drying apparatus according to claim 1, wherein mounted asymmetrically eccentric to the pivot center side. 7. A sludge drying chamber adheres to a wall of the drying chamber.
Swivel lift scraper to scrape sludge
Provided, sludge drying apparatus according to claim 1, wherein is provided a spring for biasing the rotational axis rotation around the swirler of the pivot lift scraper. 8. A sludge drying chamber which adheres to a wall of the drying chamber.
Swivel lift scraper to scrape sludge
Provided, to regulate the rotational axis rotation around the swirler of the pivot lift scraper, the clearance between the inner wall surface of the edge and sludge drying chamber of the swirl vane is provided a stopper for adjustable claim 1, wherein Sludge drying equipment. 9. The sludge drying apparatus according to claim 1, wherein a steam hot stove inlet is eccentrically provided with respect to a center of a cross section of the furnace of the hot gas generator so as to generate a swirling flow in the furnace of the hot gas generator. 10. The sludge drying apparatus according to claim 1, wherein a recirculating hot stove inlet is eccentrically provided with respect to a center of a cross section of the furnace of the hot gas generator so as to generate a swirling flow in the furnace of the hot gas generator. .