CN112628765A

CN112628765A - Sludge incineration device

Info

Publication number: CN112628765A
Application number: CN202011502452.1A
Authority: CN
Inventors: 李秀朝; 项乐群; 蓝丽梅; 纪伟勇; 雷益飞
Original assignee: Zhejiang Sanlian Environment Machinery Equipment Co ltd
Current assignee: Zhejiang Sanlian Environment Machinery Equipment Co ltd
Priority date: 2020-12-17
Filing date: 2020-12-17
Publication date: 2021-04-09
Anticipated expiration: 2040-12-17
Also published as: CN112628765B

Abstract

The invention discloses a sludge incineration device which comprises a furnace body, wherein a furnace bed is arranged at the bottom of the furnace body, an ash discharge port is formed in the middle of the furnace bed, a vertical rotating main shaft is arranged on the furnace bed, a stirring arm which rotates by taking the rotating main shaft as a rotating shaft is arranged on the rotating main shaft, an oxygen supply channel is formed in the stirring arm, a primary oxygen supply port communicated with the oxygen supply channel is formed in the bottom of the stirring arm, a shoveling plate is arranged at the end part, away from the rotating main shaft, of the stirring arm, and the shoveling plate is rotatably arranged at the. The invention has the following beneficial effects: the water content of the sludge is wide in application range; the sludge surface is rapidly replaced by arranging the rotary shoveling plate, so that the sludge drying speed is increased, and the subsequent pyrolysis incineration is facilitated; oxygen supply is directly communicated into the sludge, and the combustion-supporting effect is good; the rotary flame is adopted for combustion, the temperature in the furnace is kept consistent, and the combustion efficiency is high; harmful gases are fully combusted and removed.

Description

Sludge incineration device

Technical Field

The invention relates to the technical field of sludge treatment, in particular to a sludge incineration device.

Background

The sludge is composed of solid byproducts of sewage treatment, contains toxic and harmful substances, and needs to be subjected to stabilization, reduction and innocent treatment. With the continuous and clear understanding of the environmental risks and hazards of sludge in various regions in recent years, various national and local policies, regulations and plans continue to emerge, the situation of 'heavy muddy water' is gradually formed, and the standard of sludge treatment cost also shows a trend of increasing year by year. The treatment method taking incineration as a core is the most thorough treatment method of the sludge-state solid waste, can completely carbonize organic matters, kill pathogens, reduce the volume of the sludge-state solid waste to the maximum extent, realize the recycling of energy and solve the final disposal problem of the sludge-state solid waste. The existing incinerator can only supply oxygen on the surface of sludge, the sludge is not sufficiently incinerated inside, the efficiency is low, only sludge with large specific surface area and low water content such as dried sludge can be incinerated, and the existing incinerator is difficult to directly and effectively incinerate dehydrated sludge or fresh sludge which is viscous and has high water content. In addition, the incineration device can generate a large amount of gas containing toxic and harmful substances such as VOCs after the sludge is incinerated, and if the gas is not combusted sufficiently, the emission standard cannot be met.

For example, a "sludge incineration utilization system" disclosed in chinese patent literature, which is under publication No. CN105157040B, comprises a furnace body, a screw extruder and a smoke exhaust pipe are installed on the upper portion of the furnace body, a discharge pipe is installed at an extrusion port of the screw extruder, a fixing frame is installed at the bottom of the furnace body, a fixing rod is installed at the middle portion of the fixing frame, a bearing is installed at the middle portion of the fixing rod, an inner ring of the bearing is connected with the fixing rod, a first belt pulley and a plurality of connecting rods are installed on an outer ring of the bearing, a rotating rod is vertically installed at one end of the connecting rods, a plurality of guide plates arranged in a row are installed at the side portion of the rotating rod. The rotating rod and the guide plate are arranged in the sludge incineration device to disturb flame, so that the full combustion of gas in the furnace is ensured, but the sludge incineration device has the defects that oxygen can be supplied only on the surface of the sludge, the sludge is insufficiently incinerated inside, the efficiency is low, and the sludge with higher water content is difficult to be directly and effectively incinerated.

Disclosure of Invention

The invention aims to overcome the problem that the incineration device in the prior art is difficult to directly and fully combust sludge with higher water content, and provides a sludge incineration device which is suitable for incinerating sludge with wide water content range and realizes efficient and clean incineration.

In order to achieve the purpose, the invention adopts the following technical scheme:

the utility model provides a sludge incineration device, includes the furnace body, and the furnace body bottom is equipped with the hearth, and the hearth middle part is equipped with the ash discharge mouth, is equipped with vertical rotatory main shaft on the hearth, is equipped with on the rotatory main shaft to use it as the rotatory stirring arm of rotation axis, be equipped with the oxygen suppliment passageway in the stirring arm, the stirring arm bottom is equipped with the first oxygen suppliment mouth of intercommunication oxygen suppliment passageway, the tip that the rotatory main shaft was kept away from to the stirring arm is equipped with the flight, the flight rotates and sets up in the stirring arm bottom.

The incinerator is internally provided with a rotary stirring arm for pushing sludge to rotate, the sludge is pushed by the stirring arm to spirally move from the circumference to the circle center on the hearth, and the sludge is gradually dried, pyrolyzed, incinerated into ash and discharged from an ash discharge port in the moving process. The invention is characterized in that the stirring arm is arranged into a hollow structure to form an oxygen supply channel, combustion air is introduced into the oxygen supply channel, and oxygen is supplied to the interior of sludge from a primary oxygen supply port at the bottom of the stirring arm; simultaneously, keep away from the mud at furnace center because just get into in the furnace, the moisture content is higher, and the air is difficult to let in, through setting up the pivoted flight, stirs to turn over stir-fry high wet mud, and the specific surface area of increase and change mud rapidly helps evaporating moisture, reduces the moisture content, and the mummification is rapidly convenient follow-up abundant burning, and reduces the arm end atress of stirring, extension arm life-span. The rotation power of the shoveling plate can be provided by a motor and can also be driven to rotate by continuously introduced combustion air.

Preferably, the oxygen supply channel is internally provided with a rotating paddle, the bottom of the stirring arm is provided with a rotating cylinder communicated with the oxygen supply channel, the rotating cylinder is driven to rotate by the rotating paddle, and the shoveling plate is arranged on the outer side of the rotating cylinder.

A preferred embodiment of utilizing combustion air to drive the shoveling plate to rotate is to arrange the shoveling plate on a hollow rotary cylinder, the rotary cylinder is connected to the bottom of a stirring arm and extends downwards, the combustion air is introduced into an oxygen supply channel and drives a rotary paddle to rotate, and the rotary paddle drives the rotary cylinder to rotate so as to drive the shoveling plate to rotate and turn over sludge.

Preferably, the bottom of the stirring arm is provided with an inner barrel communicated with an oxygen supply channel, a rotating shaft of a rotating paddle is arranged in the inner barrel, a primary oxygen supply port is arranged on the wall of the inner barrel, the direction of the primary oxygen supply port is different from the rotating direction of the stirring arm, the rotating barrel is rotatably arranged on the outer side of the inner barrel, and a through hole is formed in the wall of the rotating barrel.

Further, the inner tube that communicates with the oxygen suppliment passageway is from first oxygen suppliment mouth to the inside oxygen suppliment of mud, when the stirring arm promoted mud to a direction, the stirring arm can appear great space with it on the opposite side and be used for letting in oxygen, consequently will first oxygen suppliment mouth towards the rotatory opposite direction setting of stirring arm, and rotatory barrel casing establishes including the section of thick bamboo outside, avoids blockking up first oxygen suppliment mouth at rotatory in-process through set up the through-hole in section of thick bamboo wall week.

Preferably, the bottom of the stirring arm is provided with an outer cylinder communicated with an oxygen supply channel, the wall of the outer cylinder is circumferentially provided with a wave-shaped rotary groove, a rotary shaft is rotatably arranged in the outer cylinder, a rotary paddle is arranged on the rotary shaft, the rotary shaft is connected with a rotary piece in a sliding manner along the vertical direction, the outer side of the rotary piece is connected with a shoveling plate through a guide block which is arranged in the rotary groove in a sliding manner, the rotary piece is elastically connected with the outer cylinder in the vertical direction, and the wall of the outer cylinder is further provided with a primary oxygen supply port.

The other preferred embodiment of driving the shoveling plate to rotate by utilizing combustion air is that the shoveling plate is arranged on a rotating part, the rotating part is rotatably arranged in an outer cylinder, the combustion air is introduced into a feeding channel to drive a rotating paddle to rotate, a rotating shaft synchronously rotates to drive the rotating part to rotate in the outer cylinder, the rotating part rotates under the guiding action of a guide block, the shoveling plate is driven to do vertical motion along a rotary groove while the rotating part reciprocates in the vertical direction under the action of an elastic part, the structure is arranged to enable the shoveling plate to move up and down while rotating, the stirring effect is better, the sludge surface is rapidly replaced, and the drying effect is good.

Preferably, the stirring arm bottom has arranged the cavity oxygen supply pipe of a plurality of intercommunication oxygen suppliment passageways along length direction, first oxygen suppliment mouth sets up in the lateral wall and the bottom of cavity oxygen supply pipe.

Stretch into mud through setting up cavity oxygen supply pipe in, supply oxygen to mud inside, cavity oxygen supply pipe further increases the stirring ability of stirring arm simultaneously, and many-sided oxygen suppliment is in to mud through the opening of lateral wall and bottom.

Preferably, the primary oxygen supply port is provided in plurality and the size thereof is gradually increased from top to bottom.

The oxygen inlet difficulty of the position, which is closer to the bottom, in the sludge is larger, the oxygen supply quantity at the bottom is increased by enlarging the size of the oxygen supply port, the sludge is fully incinerated, and the size of the oxygen supply port can be circular, oval, rectangular and the like.

Preferably, a spiral flow guide energy concentrator is arranged above the inside of the furnace body, a horizontal vortex combustion channel is formed between the flow guide energy concentrator and the top of the furnace body, and a smoke outlet is formed in the top of the combustion channel.

The flow guide energy concentrator is made of a fireproof heat storage material, rotates from the edge of a hearth to the center and is finally connected with a smoke outlet, combustion flame in the hearth forms a rotating backflow flame state under the action of the flow guide energy concentrator, turbulence disturbance is formed, the combustion flame swirl moves regularly along a combustion channel, the combustion time of gas in the hearth is prolonged, the temperature is uniform and stable, the combustion is full and thorough, and the generation of dioxin in the combustion process is strictly controlled.

Preferably, be provided with the secondary oxygen suppliment mouth on the furnace body lateral wall, the secondary oxygen suppliment mouth is evenly arranged around furnace body lateral wall circumference, the axial and the furnace body lateral wall tangential of secondary oxygen suppliment mouth form the contained angle, the secondary oxygen suppliment mouth oxygen supply direction is unanimous with combustion channel direction of rotation.

The secondary oxygen supply port supplies oxygen along the rotation direction of the combustion channel, so that the combustion flame in the furnace forms a rotary backflow flame with the same direction as the combustion channel, and the gas phase in the furnace body is ensured to be fully combusted.

Preferably, an auxiliary burner is arranged on the furnace body.

The auxiliary burner provides auxiliary heat for stable operation of the system, and the fuel can be gas or oil. The auxiliary burners are preferably arranged in pairs opposite to each other and in a number according to the sludge treatment amount.

Preferably, a power device and an air box are arranged below the hearth, the air box is communicated with the hollow stirring main shaft, and the power device drives the stirring main shaft to rotate.

The air box is connected with the stirring main shaft and provides combustion-supporting air for the stirring arm. And a stirring main shaft positioning bearing seat is also arranged on the air box. The power device and the air box are arranged outside the furnace body for convenient maintenance.

Therefore, the invention has the following beneficial effects: (1) the dehydrated sludge can be dried and then incinerated, or the dehydrated sludge can be directly incinerated, so that the application range of the water content of the sludge is wide; (2) the sludge surface is rapidly replaced by arranging the rotary shoveling plate, so that the sludge drying speed is increased, and the subsequent pyrolysis incineration is facilitated; (3) oxygen supply is directly communicated into the sludge, and the combustion-supporting effect is good; (4) the rotary flame is adopted for combustion, the temperature in the furnace is kept consistent, and the combustion efficiency is high; (5) harmful gases are fully combusted and removed.

Drawings

FIG. 1 is a schematic diagram of an embodiment of the present invention.

Fig. 2 is a schematic perspective view of the present invention.

FIG. 3 is a schematic view showing the structure of the end of the stirring arm in example 1 of the present invention.

FIG. 4 is a schematic view showing the structure of the end of the stirring arm in example 2 of the present invention.

FIG. 5 is a schematic view showing the structure of a spiral groove after being unfolded in example 2 of the present invention.

In the figure: 1. the furnace body, 11, a smoke outlet, 12, a secondary oxygen supply port, 13, an auxiliary burner, 2, a furnace bottom, 21, an ash discharge port, 3, a rotating main shaft, 31, a wind box, 32, a power device, 4, a rotating arm, 41, a primary oxygen supply port, 42, a shoveling plate, 43, a rotating cylinder, 44, a rotating paddle, 45, an inner cylinder, 46, an outer cylinder, 461, a rotary groove, 47, a rotating piece, 471, a guide piece, 472, a spring, 48, a hollow oxygen supply pipe, 49, a rotating shaft, 5, a flow guiding energy concentrator, 51 and a combustion channel.

Detailed Description

The invention is further described with reference to the following detailed description and accompanying drawings.

Example 1

As shown in fig. 1 and 2, the sludge incineration device comprises a circular cylindrical furnace body 1, wherein the top of the furnace body 1 is in a shape of a cone with a small top and a large bottom, a smoke outlet 11 is formed in the top of the cone, a hearth 2 is arranged at the bottom of the furnace body 1, an ash discharge port 21 is formed in the middle of the hearth 2, a vertical rotary main shaft 3 is arranged on the hearth 2, an oxygen supply channel is formed in the hollow rotary main shaft 3, six horizontal stirring arms 4 extending out along the radial direction are arranged on the rotary main shaft 3, the angles of the stirring arms 4 are consistent, the stirring arms 4 rotate clockwise by taking a rotary shaft as an axis, and the hollow stirring arms 4 form the oxygen supply. A power device 32 and an air box 31 are arranged below the furnace bed 2, the air box 31 is communicated with an oxygen supply channel of the stirring main shaft 3, and the power device 32 drives the stirring main shaft 3 to rotate.

4 bottoms of stirring arm have the cavity oxygen supply pipe 48 of a plurality of vertical settings along radial arrangement, cavity oxygen supply pipe 48 sets up the one end and the middle part position that are close to rotary spindle 3 at stirring arm 4, cavity oxygen supply pipe 48 is inside communicates with 4 oxygen supply channel of stirring arm, cavity oxygen supply pipe 48 bottoms are equipped with first oxygen suppliment mouth 41, be equipped with the circular first oxygen suppliment mouth 41 of from the top down crescent on the cavity oxygen supply pipe 48 lateral wall, first oxygen suppliment mouth opening direction on the lateral wall is opposite with swinging boom direction of rotation. As shown in fig. 3, the one end downwardly extending that is close to the oven in 4 bottoms on the rabbling arm forms inner tube 45, inner tube 45 lateral wall and bottom are equipped with first oxygen suppliment mouth 41, and the orientation is unanimous with cavity oxygen supply pipe 48, the vertical pivot 49 of fixedly connected with between inner tube 45 roof and the bottom plate, swivelling joint has rotatory oar 44 in the pivot, rotatory oar 44 paddle bottom fixedly connected with revolving drum 43, the rotatory cover of revolving drum 43 is established in the inner tube outside, revolving drum 43 circumference evenly is equipped with and corresponds first oxygen suppliment mouth 41 and slightly bigger opening than it, there is shoveling plate 42 in the revolving drum outside through bolt fixedly connected with. The distribution density of the primary oxygen supply ports gradually becomes sparse from the rotating main shaft to the furnace wall direction.

The top is equipped with spiral water conservancy diversion energy concentrator 5 in the furnace body 1, forms the burning passageway 51 of horizontal clockwise vortex between water conservancy diversion energy concentrator 5 and the furnace body 1 top, and burning passageway 51 top intercommunication outlet flue 11. Be provided with annular secondary oxygen suppliment passageway on the furnace body 1 lateral wall, be equipped with the secondary oxygen suppliment mouth 12 in the intercommunication stove on the secondary oxygen suppliment passageway, secondary oxygen suppliment mouth 12 is evenly arranged around furnace body 1 lateral wall circumference, and the axial of secondary oxygen suppliment mouth 12 forms 30 contained angles with furnace body 1 lateral wall tangent line, and secondary oxygen suppliment mouth 12 oxygen suppliment direction is unanimous with burning channel 51 direction of rotation. A pair of opposite auxiliary burners 13 is arranged on the furnace wall above the secondary oxygen supply port.

After the incineration materials are thrown into the hearth from the feeding hole, the pyrolysis incineration process is carried out on the incineration materials in a spiral moving track horizontally towards the circle center of the hearth. The whole process is completed by power and combustion air provided by the stirring arm, and the whole material moves from the periphery of the hearth to the center of a circle in the pyrolysis incineration process and needs to pass through a drying area, a pyrolysis area incineration area and a cooling area.

Incinerating materials in a drying area, continuously stir-frying by a hollow oxygen supply pipe and a shoveling plate driven by a stirring arm, evaporating water, and meanwhile, slowly moving the materials in a spiral manner towards the center direction of a hearth while drying; and a rotary shoveling plate is arranged on the stirring arm in the range corresponding to the drying area. After the material is stir-fried and dried, the temperature of the material rises to about 200 ℃, volatile substances in the material begin to evaporate and release into a hearth, and the material also moves to a pyrolysis area according to a spiral track under the action of a stirring arm; organic matters in the materials in the pyrolysis area are thermally decomposed at 200-600 ℃, and pyrolysis gas and pyrolysis carbide are formed at the same time. These combustible volatile matter and pyrolysis gas are burned together with combustion air blown out from the primary oxygen supply port. Meanwhile, under the driving of combustion air, the rotating paddle rotates along the rotating shaft to drive the shoveling plate to rotate, meanwhile, the stirring arm is stirred and rotated on the hearth at the speed of several revolutions per minute, a gap is formed between the stirring arm and the material, the material is dried rapidly, and the surface of the dried material is continuously stirred, fried and updated, so that the combustible pyrolysis gas is uniformly generated on the hearth. Because the material can be dried quickly in the drying area, the invention is suitable for the direct incineration of high-humidity sludge. The air entering from the secondary oxygen supply port arranged around the furnace wall enables the combustion flame in the furnace to form a rotating state, the combustible gas and the air are fully stirred and mixed in the furnace cavity on the upper surface of the furnace bed under the action of the flow guide energy concentrator, the flow guide energy concentrator provides a large amount of radiation heat, the incineration temperature is more stable, the flame swirling flow is more regular, and the flame is completely combusted at the upper part of the hearth. The flow guiding energy concentrator stores heat when the hearth is heated and releases heat when the hearth is cooled, so that the temperature of the hearth is effectively regulated, and the operation is stable and more stable; and simultaneously, the mixed air is neutralized, so that combustion and oxygen supply are uniform. The structure principle and the operation working condition of the incineration device are strictly designed according to the 3T control dioxin principle, and the generation of dioxin in the incineration process is strictly controlled. The main expression is in three aspects: disturbance of combustion temperature, combustion time and combustion state; firstly, the burning temperature is strictly controlled to be about 850 ℃; secondly, the flame combustion residence time is more than 2 seconds; thirdly, burning flame into a rotary reflux shape to form turbulent disturbance; the materials on the hearth also move in a ceaseless turnover and disturbance mode. Both solid phase and gas phase can be fully combusted.

The solid phase left after the combustible gas in the material is completely released, which is called as pyrolytic carbide, is mainly carbon and enters an incineration area in a hearth under the rotation of a stirring arm to be in an ignition state at the temperature of 500-800 ℃. The pyrolytic carbide is stirred and simultaneously comes into contact with air blown from a primary oxygen supply port connected to a stirring arm to start combustion, and while the pyrolytic carbide is being combusted, the pyrolytic carbide is stirred while being stirred, and gradually moves to the center of the hearth along a spiral track while being combusted. The diameter of the oxygen supply port at the bottom is increased because more combustion-supporting air is needed at the bottom, and the number of the oxygen supply ports is increased compared with the pyrolysis area; after the pyrolytic carbide is completely combusted, the pyrolytic carbide is changed into ash, enters a cooling area in a hearth, and is blown out from a primary oxygen supply port on the stirring arm for cooling; the cooled ash and slag finally move to the central part of the hearth, are discharged from an ash discharge port, enter a slag discharging device and are conveyed out. As more air is needed to cool the ash slag, the number of the primary oxygen supply ports in the cooling area is the most dense, so that on one hand, the temperature of the ash slag is reduced, the subsequent conveying is convenient, the heat in the ash slag is recovered, the temperature of combustion air is increased, and the auxiliary fuel is saved. When the temperature in the furnace is insufficient, auxiliary fuel such as natural gas can be introduced to support combustion.

Example 2

A sludge incineration device is substantially the same as that in embodiment 1, and is characterized in that as shown in FIG. 4, one end of the bottom of a stirring arm 4 close to a furnace wall extends downwards to form an outer cylinder 46 with a closed bottom, a rotating shaft 49 extends upwards from the bottom of the outer cylinder 46, the rotating shaft 49 is rotatably connected with the bottom of the outer cylinder 46, a rotating paddle 44 is arranged at the top of the rotating shaft, a protruding key is arranged in the middle of the rotating shaft, a rotating member 47 is connected outside the rotating shaft, a vertical through groove is formed in the center of the rotating member 47, the rotating shaft and the rotating member are matched and fixedly connected in the circumferential direction through a key groove and are connected in a sliding manner in the axial direction, the bottom of the rotating member is elastically connected with the bottom of the outer cylinder through a spring 472, a primary oxygen supply port 41 is arranged on the cylinder wall of the outer cylinder 46 above the rotating member, a rotary groove 461 connected end to end is arranged on the cylinder wall at, the guide block 471 is slidably disposed in the rotary groove 461, and the shoveling plate 42 is disposed outside the outer cylinder.

Combustion air is introduced into the outer cylinder 46 to drive the rotary paddle to rotate and then is discharged from the primary oxygen supply port 41, the rotating shaft 49 synchronously rotates and drives the rotating part 47 to synchronously rotate, and the guide part rotates along the rotary groove and simultaneously reciprocates up and down, so that the rotating part and the shoveling plate are driven to synchronously reciprocate up and down, the stir-frying degree of the shoveling plate is increased, materials, sludge and the like around the shoveling plate are stirred up and down while being rotated, and the materials are dried quickly.

Claims

1. The utility model provides a sludge incineration device, includes furnace body (1), furnace body (1) bottom is equipped with hearth (2), and hearth (2) middle part is equipped with ash discharge opening (21), is equipped with vertical rotating main shaft (3) on hearth (2), is equipped with on rotating main shaft (3) to use it as rotatory rabbling arm (4) of rotation axis, characterized by, be equipped with the oxygen suppliment passageway in rabbling arm (4), rabbling arm (4) bottom is equipped with first oxygen suppliment mouth (41) of intercommunication oxygen suppliment passageway, the tip that rotating main shaft (3) were kept away from in rabbling arm (4) is equipped with shoveling plate (42), shoveling plate (42) rotate and set up in rabbling arm (4) bottom.

2. A sludge incineration device according to claim 1, wherein a rotary paddle (44) is arranged in the oxygen supply channel, a rotary cylinder (43) communicated with the oxygen supply channel is arranged at the bottom of the stirring arm (4), the rotary cylinder (43) is driven to rotate by the rotary paddle (44), and the shoveling plate (42) is arranged outside the rotary cylinder (43).

3. The sludge incineration device according to claim 2, wherein an inner cylinder (45) communicated with an oxygen supply channel is arranged at the bottom of the stirring arm (4), a rotating shaft of a rotating paddle (44) is arranged in the inner cylinder (45), a primary oxygen supply port (41) is arranged on the cylinder wall of the inner cylinder (45), the direction of the primary oxygen supply port (41) is different from the rotating direction of the stirring arm (4), the rotating cylinder (43) is rotatably arranged outside the inner cylinder (45), and a through hole (431) is arranged on the cylinder wall of the rotating cylinder (43).

4. The sludge incineration device according to claim 1, wherein an outer cylinder (46) communicated with an oxygen supply channel is arranged at the bottom of the stirring arm (4), a wave-shaped rotary groove (461) is arranged on the cylinder wall of the outer cylinder (46) along the circumferential direction, a rotary shaft is rotatably arranged in the outer cylinder (46), a rotary paddle (44) is arranged on the rotary shaft, a rotary member (47) is slidably connected to the outer side of the rotary shaft along the vertical direction, the outer side of the rotary member (47) is connected with a shoveling plate (42) through a guide block (471) slidably arranged in the rotary groove (461), the rotary member (47) is elastically connected with the outer cylinder (46) in the vertical direction, and a primary oxygen supply port (41) is further arranged on the cylinder wall of the outer cylinder (46).

5. A sludge incineration apparatus as claimed in claim 1 or 2 or 3 or 4, wherein a plurality of hollow oxygen supply pipes (48) communicating with the oxygen supply channel are arranged along the length direction at the bottom of the stirring arm (4), and the primary oxygen supply ports (41) are provided at the side wall and the bottom of the hollow oxygen supply pipes (48).

6. A sludge incineration apparatus according to claim 1, 2, 3 or 4, wherein said primary oxygen supply port (41) is provided in plurality and gradually increases in size from top to bottom.

7. A sludge incinerator according to claim 1, 2, 3 or 4, characterized in that a spiral flow guiding concentrator (5) is arranged at the upper part in the furnace body (1), a horizontal vortex combustion channel (51) is formed between the flow guiding concentrator (5) and the top of the furnace body (1), and a smoke outlet (11) is arranged at the top of the combustion channel (51).

8. A sludge incineration device as claimed in claim 7, wherein the side wall of the furnace body (1) is provided with secondary oxygen supply ports (12), the secondary oxygen supply ports (12) are evenly arranged around the circumferential direction of the side wall of the furnace body (1), the axial direction of the secondary oxygen supply ports (12) forms an included angle with the tangential direction of the side wall of the furnace body (1), and the oxygen supply direction of the secondary oxygen supply ports (12) is consistent with the rotation direction of the combustion channel.

9. A sludge incineration plant as claimed in claim 1 or 2 or 3 or 4, characterised in that said furnace body (1) is provided with auxiliary burners (13).

10. A sludge incineration device according to claim 1 or 2 or 3 or 4, characterized in that a power device (32) and an air box (31) are arranged below the hearth (2), the air box (31) is communicated with the hollow stirring main shaft (3), and the power device (32) drives the stirring main shaft (3) to rotate.