Garbage incinerator with low dioxin emission and use method

Abstract

The invention discloses a low-dioxin-emission garbage incinerator which comprises an incinerator body, a flue of the incinerator body is connected with a degradation device, the degradation device comprises a horizontal barrel (1), a smoke inlet (2) is formed in one end of the barrel (1), a smoke outlet (3) is formed in the other end of the barrel (1), and a plurality of air inlets (4) obliquely facing the smoke outlet (3) are formed in the outer wall of the barrel (1). A sleeve (5) is arranged on the outer side of the cylinder body (1), a plurality of ultraviolet lamp tubes (6) which are distributed in the circumferential direction are arranged between the sleeve (5) and the cylinder body (1), and titanium dioxide layers are arranged on the inner wall of the sleeve (5) and the outer wall of the cylinder body (1); an air inducing opening (7) is formed in the peripheral face of the sleeve (5), an air generating mechanism is arranged between the sleeve (5) and the barrel (1), and the air generating mechanism enables annular flowing air flow to be generated between the barrel (1) and the sleeve (5). The method has the advantage of low dioxin emission.

Description

Technical Field

[0001] The invention belongs to the field of waste incinerator flue gas treatment equipment, and in particular relates to a low-dioxin emission waste incinerator and a use method thereof. Background Art

[0002] The garbage incinerator includes a furnace body, a flue is provided on the furnace body, and a degradation device is connected to the flue. The flue gas generated by the incineration of garbage enters the degradation device after being cooled, so that dioxins in the flue gas are degraded to reduce pollution to the environment. Existing degradation devices, such as the dioxin degradation and removal device of application number 201020681215.1, include a cylinder, a titanium dioxide layer used as a catalyst is provided on the inner wall of the cylinder, and an ultraviolet lamp is provided in the cylinder. Its working principle is that the flue gas passes through the cylinder, and the ultraviolet lamp irradiates the titanium dioxide layer to stimulate high-energy active oxygen, hydroxyl free radicals, superoxide free radicals and other substances. For the convenience of description, these substances are collectively referred to as free radicals. The free radicals degrade dioxins into small molecular substances, including water and carbon dioxide.

[0003] Existing degradation devices degrade dioxins by photocatalysis, which has the advantages of low equipment cost and low operating cost, but also have some defects. This is mainly due to the complex composition of flue gas, which contains oily particles and dust, which are easy to adhere to the titanium dioxide layer and ultraviolet lamp tubes, hindering the propagation of light, and may also cause titanium dioxide "poisoning", resulting in the number of free radicals excited by irradiating the titanium dioxide layer will gradually decrease, causing the degradation efficiency of dioxins to gradually decrease, and the emission of dioxins to increase. The titanium dioxide layer and ultraviolet lamp tubes need to be cleaned, and the incinerator needs to be shut down for cleaning. However, during busy periods, it is impossible to shut down the furnace immediately. During this period, the incinerator emits more dioxins, which is not conducive to environmental protection. Summary of the invention

[0004] The purpose of the present invention is to provide a low-dioxin emission garbage incinerator and a method of using the same. The present invention has the advantage of low dioxin emission.

[0005] The technical solution of the present invention is as follows: a low-dioxin emission waste incinerator comprises a furnace body, a degradation device is connected to the flue of the furnace body, the degradation device comprises a horizontal cylinder, one end of the cylinder forms a smoke inlet, the other end of the cylinder forms a smoke outlet, a plurality of air inlets inclined toward the smoke outlet are arranged on the outer wall of the cylinder, a sleeve is arranged on the outer side of the cylinder, a plurality of circumferentially distributed ultraviolet lamp tubes are arranged between the sleeve and the cylinder, and a titanium dioxide layer is arranged on the inner wall of the sleeve and the outer wall of the cylinder.

[0006] In the aforementioned low-emission dioxin waste incinerator, an air inlet is provided on the outer peripheral surface of the sleeve, and an air generating mechanism is provided between the sleeve and the cylinder, which generates an annular airflow between the cylinder and the sleeve.

[0007] In the aforementioned low-emission dioxin waste incinerator, the wind-generating mechanism includes a driving mechanism, an outer wind wheel located between the ultraviolet lamp tube and the sleeve, and an inner wind wheel located between the ultraviolet lamp tube and the cylinder. The outer wind wheel and the inner wind wheel are both connected to the driving mechanism. The outer wind wheel and the inner wind wheel both include two annular rings, and a plurality of wind blades are arranged between the two annular rings. The length direction of the wind blades is parallel to the cylinder.

[0008] In the aforementioned low-emission dioxin waste incinerator, in the rotation direction of the outer wind wheel, the outer end of the wind blade is located in front of the inner end of the wind blade, so that the airflow generated by the wind blade has a driving force to move radially inward.

[0009] In the aforementioned low-emission dioxin waste incinerator, two rolling support units are provided between the cylinder and the sleeve, and the two rolling support units are respectively located at both ends of the sleeve;

[0010] The rolling support unit includes an outer ring fixed to the inner side of the sleeve, an inner ring fixed to the outer side of the cylinder, and a middle ring located between the outer ring and the inner ring. A plurality of circumferentially distributed rollers are arranged between the outer ring and the middle ring and between the middle ring and the inner ring. A rotating shaft is arranged in the axial direction of the rollers.

[0011] The inner end of the rotating shaft located between the outer ring and the middle ring is fixed to the outer wind wheel, and the inner end of the rotating shaft located between the middle ring and the inner ring is fixed to the inner wind wheel;

[0012] The driving mechanism includes a motor and an outer gear ring. The motor is fixed on the outer wall of the cylinder. The output end of the motor is provided with a first gear connected to the outer gear ring. The outer gear ring is located on the outside of one of the rolling support units and is rotatably connected to the corresponding inner ring. The outer wind wheel and the inner wind wheel are fixed to the outer gear ring through corresponding rotating shafts.

[0013] In the aforementioned low-emission dioxin waste incinerator, the driving mechanism also includes an outer ring located outside another rolling support unit, an inner ring is provided inside the outer ring, the outer ring is fixed to the outer wind wheel through a corresponding rotating shaft, and the inner ring is fixed to the inner wind wheel through a corresponding rotating shaft.

[0014] In the aforementioned low-emission dioxin waste incinerator, a retarder connected to the cylinder is provided on the middle ring between the outer ring and the inner ring, and the retarder is used to reduce the rotation speed of the middle ring.

[0015] In the aforementioned low-emission dioxin waste incinerator, the retarder includes a crown gear fixed to the middle ring, one side of the crown gear is provided with a generator motor fixed to the cylinder, the input end of the generator motor is provided with a second gear meshing with the crown gear, and the output end of the generator motor is provided with a power-consuming element.

[0016] In the aforementioned low-emission dioxin waste incinerator, both ends of the ultraviolet lamp tube are provided with lamp holders fixed to the corresponding middle circle, and two first elastic contacts are provided on the outer end surface of the middle circle located at one end of the smoke inlet, and the two first elastic contacts are respectively connected to the two input ends of the ultraviolet lamp tube; the inner end surface of the middle circle is provided with a first conductive ring and a second conductive ring, and the first conductive ring and the second conductive ring are respectively connected to the two first elastic contacts; the outer end surface of the middle circle is provided with a third conductive ring and a fourth conductive ring, and the third conductive ring is electrically connected to the first conductive ring, and the fourth conductive ring is electrically connected to the second conductive ring; a bracket is provided on the cylinder, and two second elastic contacts are provided on the bracket, and the third conductive ring and the fourth conductive ring are respectively connected to the two second elastic contacts.

[0017] The method for using the aforementioned low-emission dioxin waste incinerator is to change the power of the ultraviolet lamp according to the flue gas flow rate in the cylinder. When the flue gas flow rate increases, the power of the ultraviolet lamp increases.

[0018] Compared with the prior art, the present invention improves the degradation device of the incinerator, and sets the titanium dioxide layer and the ultraviolet lamp tube outside the cylinder. The free radicals are generated outside the cylinder and then enter the cylinder to degrade the dioxins in the flue gas. Since the flue gas does not contact the titanium dioxide layer and the ultraviolet lamp tube, the titanium dioxide layer and the ultraviolet lamp tube remain clean for a long time, and the number of free radicals generated will not gradually decrease, so that the overall number of dioxins emitted by the incinerator is small, which is beneficial to environmental protection. Therefore, the present invention has the advantage of less dioxin emission.

[0019] In addition, through further structural improvements, free radicals are easily desorbed from the titanium dioxide layer, which increases the concentration of free radicals entering the cylinder, thereby improving the degradation efficiency of dioxins and further reducing the emission of dioxins. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic front view of the degradation device.

[0021] Figure 2 yes Figure 1 Enlarged view at A.

[0022] Figure 3 yes Figure 1 Enlarged view at B.

[0023] Figure 4 is a cross-sectional schematic diagram of the degradation device.

[0024] The marks in the accompanying drawings are: 1-cylinder, 2-smoke inlet, 3-smoke outlet, 4-air inlet, 5-sleeve, 6-ultraviolet lamp tube, 7-air duct, 8-inner wind wheel, 9-outer wind wheel, 10-annular ring, 11-fan blade, 12-rolling support unit, 13-outer ring, 14-inner ring, 15-middle ring, 16-roller, 17-rotating shaft, 18-motor, 19-outer gear ring, 20-first gear, 21-outer ring, 22-inner ring, 23-crown gear, 24-generator motor, 25-second gear, 26-first elastic contact, 27-first conductive ring, 28-second conductive ring, 29-third conductive ring, 30-fourth conductive ring, 31-bracket, 32-second elastic contact, 33-lamp holder, 34-cavity. DETAILED DESCRIPTION

[0025] The present invention is further described below in conjunction with the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0026] Embodiment. A low-emission waste incinerator for dioxins comprises a furnace body, and a flue of the furnace body is connected to Figure 1 The degradation device shown includes a horizontal cylinder 1, a smoke inlet 2 is formed at one end of the cylinder 1, a smoke outlet 3 is formed at the other end of the cylinder 1, a plurality of air inlets 4 inclined toward the smoke outlet 3 are provided on the outer wall of the cylinder 1, a sleeve 5 is provided on the outer side of the cylinder 1, the sleeve 5 can be fixed to the cylinder 1 by a connecting rod, an air inlet 7 is provided on the outer peripheral surface of the sleeve 5, a plurality of circumferentially distributed ultraviolet lamp tubes 6 are provided between the sleeve 5 and the cylinder 1, and a titanium dioxide layer is provided on the inner wall of the sleeve 5 and the outer wall of the cylinder 1.

[0027] An air-generating mechanism is provided between the sleeve 5 and the cylinder 1, and the air-generating mechanism generates an airflow between the cylinder 1 and the sleeve 5, which is mainly an annular flow and secondarily a radial inward flow. The air-generating mechanism includes a driving mechanism, an outer wind wheel 9 located between the ultraviolet lamp tube 6 and the sleeve 5, and an inner wind wheel 8 located between the ultraviolet lamp tube 6 and the cylinder 1. The outer wind wheel 9 and the inner wind wheel 8 are both connected to the driving mechanism, and the outer wind wheel 9 and the inner wind wheel 8 each include two annular rings 10, which are respectively located at the axial ends of the sleeve 5, and a plurality of fan blades 11 are provided between the two annular rings 10, and the fan blades 11 are parallel to the cylinder 1 in the long direction. In the rotation direction of the fan wheel, the outer end of the fan blade 11 is located in front of the inner end of the fan blade 11, so that the airflow generated by the fan blade 11 has a driving force for radial inward movement. By changing the inclination angle of the fan blade 11, the speed of the radial inward flow of the airflow can be changed.

[0028] Two rolling support units 12 are provided between the cylinder 1 and the sleeve 5, and the two rolling support units 12 are respectively located at the two ends of the sleeve 5. The rolling support unit 12 includes an outer ring 13 fixed on the inner side of the sleeve 5, an inner ring 14 fixed on the outer side of the cylinder 1, and a middle ring 15 located between the outer ring 13 and the inner ring 14. A plurality of circumferentially distributed rollers 16 are provided between the outer ring 13 and the middle ring 15, and between the middle ring 15 and the inner ring 14. The rollers 16 are cylindrical, and a rotating shaft 17 is provided in the axial direction of the rollers 16, and the rollers 16 can rotate on the rotating shaft 17. The outer ends of the outer ring 13 and the outer ends of the inner ring 14 are both provided with an annular boss for limiting the axial outward movement of the corresponding rollers 16, and the inner end of the middle ring 15 is provided with an annular stopper for limiting the axial inward movement of the rollers 16.

[0029] The inner end of the rotating shaft 17 located between the outer ring 13 and the middle ring 15 is fixed to the outer wind wheel 9 , and the inner end of the rotating shaft 17 located between the middle ring 15 and the inner ring 14 is fixed to the inner wind wheel 8 .

[0030] The driving mechanism includes a motor 18 and an outer gear ring 19 made of insulating material. The motor 18 is fixed to the outer wall of the cylinder 1 through a frame. The output end of the motor 18 is provided with a first gear 20 connected to the outer gear ring 19. The outer gear ring 19 is located axially outside one of the rolling support units 12 and is rotatably connected to the corresponding inner ring 14. The outer wind wheel 9 and the inner wind wheel 8 are fixed to the outer gear ring 19 through the corresponding rotating shaft 17.

[0031] The driving mechanism further includes an outer ring 21 located outside another rolling support unit 12, an inner ring 22 is provided inside the outer ring 21, the outer ring 21 is fixed to the outer wind wheel 9 through the corresponding rotating shaft 17, and the inner ring 22 is fixed to the inner wind wheel 8 through the corresponding rotating shaft 17. The outer ring 21 and the inner ring 22 are used to increase the structural strength, so that each ultraviolet lamp tube 6 is arranged in parallel and the light is uniform.

[0032] A deceleration device connected to the cylinder 1 is provided on the middle ring 15 between the outer ring 21 and the inner ring 22, and the deceleration device is used to reduce the rotation speed of the middle ring 15. The deceleration device includes a crown gear 23 fixed to the middle ring 15, the teeth of the crown gear 23 face outward, a generator motor 24 fixed to the cylinder 1 is provided on one side of the crown gear 23, a second gear 25 meshing with the crown gear 23 is provided at the input end of the generator motor 24, and a power-consuming element is provided at the output end of the generator motor 24, and the power-consuming element can be a heating wire, a high-power lighting lamp, a fan, etc.

[0033] Both ends of the ultraviolet lamp tube 6 are provided with lamp holders 33 fixed to the corresponding middle rings 15. The two middle rings 15 form an integral structure through the ultraviolet lamp tube 6. Two first elastic contacts 26 are provided on the outer end surface of the middle ring 15 located at one end of the smoke inlet 2. The two first elastic contacts 26 are respectively connected to the two electrical input ends of the ultraviolet lamp tube 6; a first conductive ring 27 and a second conductive ring 28 are provided on the inner end surface of the middle ring 15. The first conductive ring 27 and the second conductive ring 28 are respectively connected to the two first elastic contacts 26; a third conductive ring 29 and a fourth conductive ring 30 are provided on the outer end surface of the middle ring 15. The third conductive ring 29 is electrically connected to the first conductive ring 27, and the fourth conductive ring 30 is electrically connected to the second conductive ring 28; a bracket 31 is provided on the cylinder 1, and two second elastic contacts 32 are provided on the bracket 31. The third conductive ring 29 and the fourth conductive ring 30 are respectively connected to the two second elastic contacts 32.

[0034] Working principle of the degradation device: Figure 1 As shown, a relatively closed cavity 34 is formed between the cylinder 1 and the sleeve 5, and the smoke coming out of the flue flows from the smoke inlet 2 to the smoke outlet 3. Since the air inlet 4 is directed toward the smoke outlet 3, the smoke flow generates negative pressure, causing the air in the cavity 34 to enter the cylinder 1.

[0035] The two second elastic contacts 32 are connected to the power circuit, and the ultraviolet lamp 6 is powered on to emit light, which irradiates the titanium dioxide layer, so that free radicals are generated in the cavity 34 and enter the cylinder 1 with the air flow, so as to degrade dioxins in the flue gas.

[0036] The motor 18 rotates the outer gear ring 19 through the first gear 20, and the outer gear ring 19 rotates the inner wind wheel 8 and the outer wind wheel 9 synchronously through the rotating shaft 17 on the left side, so that an annular airflow is generated in the cavity 34. After many tests by the applicant, the free radicals generated by the ultraviolet lamp tube 6 irradiating the titanium dioxide layer are mainly enriched on the surface of the titanium dioxide layer. Although they can enter the air, the speed is very slow. Therefore, the annular airflow is used to accelerate the speed of free radical desorption, increase the free radical concentration in the cavity 34, and improve the degradation efficiency of dioxins. At the same time, the annular airflow desorbs free radicals by repeatedly impacting the titanium dioxide layer with the same source of air, and will not introduce a large amount of external air, which helps to increase the concentration of free radicals in the cylinder 1, thereby improving the degradation efficiency of dioxins.

[0037] The speed of flue gas flow fluctuates. When the flue gas flow rate is slow, the negative pressure generated is low, which may not be enough to allow the air in the cavity 34 to enter the cylinder 1, and even the flue gas in the cylinder 1 will enter the cavity 34. Therefore, in the rotation direction of the wind wheel, the outer end of the fan blade 11 is set to be located in front of the inner end of the fan blade 11. When the fan blade rotates, 1 gives an extrusion force to the air in the cavity 34 to move inward, ensuring that the air pressure in the cavity 34 is greater than the air pressure in the cylinder 1, ensuring that the free radicals can smoothly enter the cylinder 1 to maintain the normal degradation of dioxins, and at the same time preventing the flue gas in the cylinder 1 from entering the cavity 34, effectively preventing the titanium dioxide layer and the ultraviolet lamp 6 from adhering to oily particles and dust, no cleaning is required for long-term use, and the maintenance frequency is low.

[0038] The cylinder 1 and the sleeve 5 are stationary, so that the outer ring 13 and the inner ring 14 are also stationary. When the outer gear ring 19 rotates, the roller 16 rotates, giving a certain friction to the middle ring 15, driving the middle ring 15 to rotate, and the ultraviolet lamp tube 6 rotates accordingly, making the light distribution in the cavity more uniform, while avoiding overheating in local areas due to being too close to the ultraviolet lamp tube 6. Free radicals can be efficiently generated everywhere in the titanium dioxide layer, providing a guarantee for the efficient decomposition of dioxins.

[0039] Since the high-speed rotation of the left middle circle 15 will cause the contact wear to accelerate, a crown gear 23 is set on the right middle circle 15. When the left middle circle 15 rotates, the right middle circle 15 is driven to rotate through the ultraviolet lamp 6, and the right middle circle 15 drives the second gear 25 to rotate through the crown gear 23, so that the generator motor 24 generates electricity, and the electric energy is consumed by the power-consuming components. Since the generator motor 24 generates current and consumes energy, the speed of the left middle circle 15 decreases. This is a dynamic process. The greater the speed of the left middle circle 15, the greater the resistance given by the generator motor 24, and the smaller the speed of the left middle circle 15, the smaller the resistance given by the generator motor 24. While ensuring that the ultraviolet lamp 6 can rotate smoothly, it avoids the accelerated wear of the contacts caused by too fast a speed and reduces the maintenance frequency.

[0040] Usage: Change the power of the ultraviolet lamp 6 according to the flue gas flow rate in the cylinder 1. When the flue gas flow rate is fast, it means that the amount of dioxins in the cylinder 1 is large, and the power of the ultraviolet lamp 6 is increased accordingly to generate more free radicals to ensure that the dioxins are degraded more thoroughly. When the flue gas flow rate is slow, it means that the amount of dioxins in the cylinder 1 is small, and the power of the ultraviolet lamp 6 is reduced accordingly to reduce the aging speed of the ultraviolet lamp 6. The flue gas flow rate in the cylinder 1 can be measured by setting a flue gas flow meter on the cylinder 1.

[0041] In the description of the present invention, it is necessary to understand that the terms "up", "down", "front", "back", "left", "right", etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

Claims

1. A low-emission dioxin waste incinerator, comprising a furnace body, a flue of which is connected with a degradation device, characterized in that: The degradation device comprises a horizontal cylinder (1), one end of the cylinder (1) forms a smoke inlet (2), the other end of the cylinder (1) forms a smoke outlet (3), the outer wall of the cylinder (1) is provided with a plurality of air inlets (4) inclined toward the smoke outlet (3), a sleeve (5) is provided on the outer side of the cylinder (1), a plurality of circumferentially distributed ultraviolet lamp tubes (6) are provided between the sleeve (5) and the cylinder (1), and a titanium dioxide layer is provided on the inner wall of the sleeve (5) and the outer wall of the cylinder (1).

2. The low-emission dioxin waste incinerator according to claim 1, characterized in that: An air inlet (7) is provided on the outer peripheral surface of the sleeve (5), and an air generating mechanism is provided between the sleeve (5) and the cylinder (1). The air generating mechanism generates an annular airflow between the cylinder (1) and the sleeve (5).

3. The low-emission dioxin waste incinerator according to claim 2, characterized in that: The wind generating mechanism comprises a driving mechanism, an outer wind wheel (9) located between the ultraviolet lamp tube (6) and the sleeve (5), and an inner wind wheel (8) located between the ultraviolet lamp tube (6) and the cylinder (1); the outer wind wheel (9) and the inner wind wheel (8) are both connected to the driving mechanism; the outer wind wheel (9) and the inner wind wheel (8) each comprise two annular rings (10); a plurality of wind blades (11) are arranged between the two annular rings (10); and the length direction of the wind blades (11) is parallel to the cylinder (1).

4. The low-emission dioxin waste incinerator according to claim 3, characterized in that: In the rotation direction of the outer wind wheel (9), the outer end of the fan blade (11) is located in front of the inner end of the fan blade (11), so that the airflow generated by the fan blade (11) has a driving force to move radially inward.

5. The low-dioxin emission waste incinerator according to claim 3 or 4, characterized in that: Two rolling support units (12) are provided between the cylinder (1) and the sleeve (5), and the two rolling support units (12) are respectively located at two ends of the sleeve (5); The rolling support unit (12) comprises an outer ring (13) fixed on the inner side of the sleeve (5), an inner ring (14) fixed on the outer side of the cylinder (1), and a middle ring (15) located between the outer ring (13) and the inner ring (14); a plurality of rollers (16) distributed in the circumferential direction are arranged between the outer ring (13) and the middle ring (15) and between the middle ring (15) and the inner ring (14); and a rotating shaft (17) is arranged on the rollers (16) in the axial direction; The inner end of the rotating shaft (17) located between the outer ring (13) and the middle ring (15) is fixed to the outer wind wheel (9), and the inner end of the rotating shaft (17) located between the middle ring (15) and the inner ring (14) is fixed to the inner wind wheel (8); The driving mechanism comprises a motor (18) and an outer gear ring (19); the motor (18) is fixed on the outer wall of the cylinder (1); the output end of the motor (18) is provided with a first gear (20) connected to the outer gear ring (19); the outer gear ring (19) is located outside one of the rolling support units (12) and is rotationally connected to the corresponding inner ring (14); the outer wind wheel (9) and the inner wind wheel (8) are both fixed to the outer gear ring (19) via corresponding rotating shafts (17).

6. The low-emission dioxin waste incinerator according to claim 5, characterized in that: The driving mechanism further comprises an outer ring (21) located outside another rolling support unit (12), an inner ring (22) being provided inside the outer ring (21), the outer ring (21) being fixed to the outer wind wheel (9) via a corresponding rotating shaft (17), and the inner ring (22) being fixed to the inner wind wheel (8) via a corresponding rotating shaft (17).

7. The low-dioxin emission waste incinerator according to claim 6, characterized in that: A deceleration device connected to the cylinder (1) is provided on the middle ring (15) between the outer ring (21) and the inner ring (22), and the deceleration device is used to reduce the rotation speed of the middle ring (15).

8. The low-emission dioxin waste incinerator according to claim 7, characterized in that: The deceleration device comprises a crown gear (23) fixed to the middle ring (15); a generator motor (24) fixed to the cylinder (1) is provided on one side of the crown gear (23); a second gear (25) meshing with the crown gear (23) is provided at the input end of the generator motor (24); and a power-consuming element is provided at the output end of the generator motor (24).

9. The low-emission dioxin waste incinerator according to claim 5, characterized in that: Both ends of the ultraviolet lamp tube (6) are provided with lamp holders (33) fixed to the corresponding middle ring (15); two first elastic contacts (26) are provided on the outer end surface of the middle ring (2) at one end of the smoke inlet (2); the two first elastic contacts (26) are respectively connected to the two input ends of the ultraviolet lamp tube (6); a first conductive ring (27) and a second conductive ring (28) are provided on the inner end surface of the middle ring (15); the first conductive ring (27) and the second conductive ring (28) are respectively connected to the two first conductive contacts (26). a spring contact (26); a third conductive ring (29) and a fourth conductive ring (30) are provided on the outer end surface of the middle ring (15); the third conductive ring (29) and the first conductive ring (27) are electrically connected; the fourth conductive ring (30) and the second conductive ring (28) are electrically connected; a bracket (31) is provided on the cylinder (1); two second spring contacts (32) are provided on the bracket (31); the third conductive ring (29) and the fourth conductive ring (30) are respectively connected to the two second spring contacts (32).

10. The method for using the low-dioxin emission waste incinerator according to any one of claims 1 to 9, characterized in that: The power of the ultraviolet lamp (6) is changed according to the flue gas flow rate in the cylinder (1); when the flue gas flow rate increases, the power of the ultraviolet lamp (6) increases.

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