CN111306543A

CN111306543A - Power generation equipment based on waste incineration and power generation method thereof

Info

Publication number: CN111306543A
Application number: CN202010087313.0A
Authority: CN
Inventors: 陆宁宁
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-02-11
Filing date: 2020-02-11
Publication date: 2020-06-19

Abstract

The invention discloses power generation equipment based on waste incineration, which comprises a waste incinerator (1), a bag-type dust collector (2), a turbo generator set (4) and a steam generation device (3); the garbage incinerator (1) comprises a hearth (5), a smoke outlet (6) arranged at the top of the hearth (5), a first grate (7) and a second grate (8) which are arranged in the hearth (5); the bag-type dust collector (2) comprises a tank body (14), a motor A (15) and a discharge valve (16) arranged at the bottom of the tank body (14); the steam generating device (3) comprises a cylinder (24), a motor B (25), a speed reducer (26), a driving gear (27), a driven gear (28) and a hollow shaft (29), wherein an output shaft of the motor B (25) is connected with an input shaft of the speed reducer (26) through a coupling; it also discloses a power generation method. The invention has the beneficial effects that: the structure is compact, the generating capacity is greatly improved, the generating efficiency is improved, and the normal operation of power generation is ensured.

Description

Power generation equipment based on waste incineration and power generation method thereof

Technical Field

The invention relates to the technical field of waste incineration power generation, in particular to power generation equipment based on waste incineration and a power generation method thereof.

Background

At present, with the rapid development of economic society, the living of residents is steadily improved, the yield of household garbage, particularly urban household garbage, is rapidly increased, a single garbage landfill mode cannot meet the garbage treatment requirement, and garbage incineration power generation is rapidly developed by the advantages of harmlessness, reduction and recycling, so most of garbage treatment plants at present adopt garbage incinerators to incinerate garbage, and the incinerated household garbage can also be used for power generation. The existing garbage incineration power generation equipment comprises an incinerator, a bag-type dust remover, a boiler and a turbo generator set, wherein a smoke outlet of the incinerator is connected with a smoke inlet of the bag-type dust remover through a pipeline, a smoke outlet of the bag-type dust remover is connected with an inlet end of the boiler through a pipeline, and a steam outlet end of the boiler is connected with a steam inlet end of the turbo generator set through a pipeline. When the garbage incinerator works, garbage is thrown into the incinerator, flame is sprayed out from a gas burner in the incinerator to burn the garbage, hot flue gas generated during burning is discharged through a smoke outlet, the hot flue gas enters a bag-type dust collector, flying ash carried in the hot flue gas is filtered out by a bag in the bag-type dust collector, the hot flue gas with the flying ash filtered out enters a boiler, heat exchange is generated between the hot flue gas and water in the boiler, the water is heated by the hot flue gas to form hot steam, the hot steam flows out from a steam outlet end of the boiler under the steam pressure and enters a turbo generator set, finally, the turbo generator set is utilized to generate electricity, waste is changed into wealth, cleanness and environmental protection are achieved.

However, although such waste incineration equipment can generate electricity by using waste, the following drawbacks still exist: 1. the movement time of the garbage in the incinerator is short, the flame sprayed by the burner cannot fully burn out the garbage, so that the heat of the garbage is not completely released, and the generating capacity is further reduced. 2. When the fly ash in the hot flue gas is filtered by the cloth bag, the fly ash is attached to the outside of the cloth bag due to long-term work of the cloth bag, so that the hot flue gas cannot penetrate through the cloth bag and enter a boiler, and further cannot normally generate electricity. 3. The water in the boiler is still, and the boiler water can be heated and changed into hot steam only after long time consumption, so that the output of the hot steam is reduced, and the power generation efficiency is further reduced. Therefore, there is a need for a power generation facility that can greatly increase the amount of power generation, increase the power generation efficiency, and ensure the normal operation of power generation.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide the power generation equipment based on waste incineration and the power generation method thereof, which have the advantages of compact structure, greatly improved power generation capacity, improved power generation efficiency, capability of ensuring normal power generation and simple operation.

The purpose of the invention is realized by the following technical scheme: a power generation device based on waste incineration comprises a waste incinerator, a bag-type dust collector, a steam turbine generator unit and a steam generation device;

the garbage incinerator comprises a hearth, a smoke outlet arranged at the top of the hearth, and a first grate and a second grate which are arranged in the hearth, wherein the bottoms of the first grate and the second grate are respectively provided with a first air inlet bin and a second air inlet bin;

the bag-type dust collector comprises a tank body, a motor A and a discharge valve arranged at the bottom of the tank body, wherein a vertical partition plate is fixedly arranged at the top of the tank body, a transverse partition plate is fixedly arranged on the vertical partition plate, a mounting hole is formed in the transverse partition plate, a vertically-arranged bag is arranged in the mounting hole, the upper end of the bag extends above the transverse partition plate, a rotary table is fixedly arranged at the top of the horizontal partition plate, the lower end of the bag extends below the transverse partition plate, the motor A is vertically arranged and fixedly mounted at the top of the tank body, an output shaft of the motor A downwardly extends into the tank body, a rotary shaft is connected onto the output shaft through a coupler, the bottom of the rotary shaft is welded; the left side wall and the right side wall of the tank body are respectively provided with a flue gas inlet and a flue gas outlet, the flue gas outlet is positioned above the transverse partition plate, the flue gas inlet is opposite to the vertical partition plate, and the flue gas inlet is connected with the smoke outlet through a pipeline;

the steam generating device comprises a cylinder body, a motor B, a speed reducer, a driving gear, a driven gear and a hollow shaft, wherein the cylinder body is horizontally arranged, the left end part and the right end part of the cylinder body are both sealed, a steam outlet hole communicated with the cylinder body is formed in the top of the cylinder body, a stop valve is connected to the steam outlet hole, the other end of the stop valve is connected with a steam inlet end of a turbo generator set through a pipeline, a water replenishing valve is further arranged at the top of the cylinder body, the hollow shaft penetrates through the cylinder body from the right side to the left side along the axial direction of the cylinder body, the left end part and the right end part of the hollow shaft are respectively connected with a rotary joint I and a rotary joint II, the other end of the rotary joint I is connected with a flue gas outlet through a pipeline, the other end of the rotary joint II is connected with a flue gas absorption, the output shaft of the speed reducer is provided with a driving gear, and the driving gear is meshed with a driven gear.

The cloth bag is in contact with the inner wall of the mounting hole.

The bottom of the cloth bag is closed, and the cross section of the cloth bag is circular.

The hearth and the barrel are supported on the ground through a plurality of supporting legs.

The garbage incinerator, the bag-type dust collector, the steam generating device and the steam turbine generator unit are sequentially arranged from left to right.

And a movable sealing element is arranged at the contact position of the hollow shaft and the cylinder body.

And a sealed cavity is formed among the vertical partition plate, the transverse partition plate and the tank body.

A through groove is formed in the top of the tank body, and an output shaft of the motor A penetrates through the through groove.

The smoke outlet is connected with a smoke return pipe, and the other end of the smoke return pipe is communicated with the top of the hearth.

The power generation method based on the waste incineration power generation equipment comprises the following steps:

s1, opening a water replenishing valve, and replenishing a certain amount of water into the cylinder body through the water replenishing valve; a worker opens a first induced draft fan, a second induced draft fan and a burner, the first induced draft fan and the second induced draft fan respectively introduce air into a first air inlet bin and a second air inlet bin, and the air enters a hearth to play a role in supporting combustion;

s2, dumping the garbage into the feed inlet by a worker, enabling the garbage to fall onto the first grate, conveying the household garbage to the right by the first grate, then falling onto the second grate from the first grate, ejecting flame by the burner to incinerate the household garbage on the second grate, and discharging the slag obtained after incineration to the outside of the hearth through the slag discharge port;

s3, discharging hot flue gas generated by burning garbage from a smoke outlet, enabling the hot flue gas with fly ash to enter the tank body through a flue gas inlet of a bag-type dust collector, filtering the fly ash carried in the hot flue gas by using a bag, enabling the hot flue gas with the fly ash filtered to enter a flue gas absorption tower through a flue gas outlet of the bag-type dust collector, a rotary joint I, an inner cavity of a hollow shaft and a rotary joint II in sequence, and absorbing the flue gas through liquid medicine sprayed in the flue gas absorption tower;

s4, turning on a motor B, transmitting the torque of the motor B to a driving gear after being reduced by a reducer, driving the driving gear to drive a driven gear to rotate, driving a hollow shaft to rotate around the axis of the driven gear, driving a helical blade to rotate by the hollow shaft, conveying water in a cylinder to the right by the helical blade, stirring the water in the conveying process, heating the water in the cylinder by heat on hot flue gas, changing the heated water into high-temperature steam, allowing the high-temperature steam to pass through a steam outlet hole and a stop valve under the steam pressure to enter a turbo generator unit, and generating electricity by the turbo generator unit by using the steam;

and S5, continuously dumping the garbage to realize continuous utilization of the garbage to generate electricity, and changing waste into valuable.

The invention has the following advantages:

1. according to the invention, the first air inlet bin and the second air inlet bin are respectively arranged at the bottoms of the first grate and the second grate, the bottom of the first air inlet bin is connected with the first induced draft fan, and the bottom of the second air inlet bin is connected with the second induced draft fan.

2. The upper end part of the cloth bag of the invention extends above the transverse clapboard, the top part is fixedly provided with the rotating disc, the lower end part of the cloth bag extends below the transverse clapboard, the motor A is vertically arranged and fixedly arranged at the top of the tank body, an output shaft of the motor A extends downwards into the tank body, and the output shaft is connected with a rotating shaft through a coupler, the bottom of the rotating shaft is welded on the rotating disc, the rotating shaft and the rotating disc are coaxially arranged, when the cloth bag works for a period of time, the motor A can be started, the motor A drives the rotating shaft to rotate, the rotating shaft drives the rotating disc and the cloth bag on the rotating disc to do circumferential rotating motion around the axis of the mounting hole, all fly ash attached to the cloth bag is thrown to the bottom of the tank body under the action of centrifugal force, thereby effectively avoided the sack to be blockked up to guaranteed going on smoothly of electricity generation, need not frequently to change the sack, very big reduction workman's intensity of labour.

3. The hollow shaft of the invention penetrates through the barrel body from right to left along the axial direction of the barrel body, the left end part and the right end part of the hollow shaft are respectively connected with a rotary joint I and a rotary joint II, the other end of the rotary joint I is connected with a flue gas outlet through a pipeline, the other end of the rotary joint II is connected with a flue gas absorption tower through a pipeline, a helical blade is arranged in the barrel body along the axial direction of the hollow shaft on the hollow shaft, and a driven gear is arranged on the right extension end of the hollow shaft.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a front cross-sectional view of FIG. 1;

FIG. 3 is a schematic view of the structure of the steam generating apparatus;

FIG. 4 is a front cross-sectional view of FIG. 3;

FIG. 5 is a schematic structural view of a bag-type dust collector;

FIG. 6 is a front cross-sectional view of FIG. 5;

FIG. 7 is a schematic view of the mounting of the hollow shaft and the helical blade;

FIG. 8 is a schematic structural diagram according to a second embodiment of the present invention;

in the figure, 1-a garbage incinerator, 2-a bag-type dust collector, 3-a steam generating device, 4-a turbo generator set, 5-a hearth, 6-a smoke outlet, 7-a first fire grate, 8-a second fire grate, 9-a first air inlet bin, 10-a second air inlet bin, 11-a slag outlet, 12-a feed inlet, 13-a burner, 14-a tank body, 15-a motor A, 16-a discharge valve, 17-a vertical clapboard, 18-a transverse clapboard, 19-a cloth bag, 20-a rotary table, 21-a rotary shaft, 22-a smoke inlet, 23-a smoke outlet, 24-a cylinder body, 25-a motor B, 26-a speed reducer, 27-a driving gear, 28-a driven gear, 29-a hollow shaft and 30-a steam outlet hole, 31-a stop valve, 32-a water replenishing valve, 33-rotary joints I and 34-rotary joints II and 35-helical blades, 36-a dynamic sealing element, 37-a through groove, 38-a smoke returning pipe, 39-a first induced draft fan, 40-a second induced draft fan, 41-a smoke absorption tower and 42-garbage.

Detailed Description

The invention will be further described with reference to the accompanying drawings, without limiting the scope of the invention to the following:

the first embodiment is as follows: as shown in fig. 1-2, a power generation device based on waste incineration comprises a waste incinerator 1, a bag-type dust collector 2, a turbo generator unit 4 and a steam generation device 3. The garbage incinerator 1, the bag-type dust collector 2, the steam generating device 3 and the turbo generator unit 4 are sequentially arranged from left to right.

As shown in fig. 1-2, the garbage incinerator 1 includes a hearth 5, a smoke outlet 6 arranged at the top of the hearth 5, a first grate 7 and a second grate 8 arranged in the hearth 5, the bottoms of the first grate 7 and the second grate 8 are respectively provided with a first air inlet bin 9 and a second air inlet bin 10, the bottom of the first air inlet bin 9 is connected with a first induced draft fan 39, the bottom of the second air inlet bin 10 is connected with a second induced draft fan 40, a slag discharge port 11 is further arranged in the hearth 5, the slag discharge port 11 is arranged on the right side of the second grate 8, a feed inlet 12 is arranged on the hearth 5, the feed inlet 12 is arranged right above the first grate 7, a combustor 13 is arranged on the outer wall of the hearth 5, and the combustor 13 is arranged towards the second grate 8.

As shown in fig. 5 to 6, the bag-type dust collector 2 includes a tank 14, a motor a15, and a discharge valve 16 disposed at the bottom of the tank 14, a vertical partition 17 is fixedly disposed at the top of the tank 14, a horizontal partition 18 is fixedly disposed on the vertical partition 17, a mounting hole is disposed on the horizontal partition 18, a vertically disposed bag 19 is disposed in the mounting hole, the bag 19 contacts with the inner wall of the mounting hole, the bottom of the bag 19 is sealed, and the cross section of the bag 19 is circular. The upper end of the cloth bag 19 extends above the transverse partition plate 18, the top of the cloth bag is fixedly provided with a rotary table 20, the lower end of the cloth bag 19 extends below the transverse partition plate 18, the motor A15 is vertically arranged and fixedly mounted at the top of the tank body 14, the output shaft of the motor A15 extends downwards into the tank body 14, the output shaft is connected with a rotary shaft 21 through a coupler, the bottom of the rotary shaft 21 is welded on the rotary table 20, and the rotary shaft 21 and the rotary table 20 are coaxially arranged; the left side wall and the right side wall of the tank body 14 are respectively provided with a flue gas inlet 22 and a flue gas outlet 23, the flue gas outlet 23 is positioned above the transverse partition plate 18, the flue gas inlet 22 and the vertical partition plate 17 are oppositely arranged, and the flue gas inlet 22 is connected with the smoke outlet 6 through a pipeline.

As shown in fig. 3, 4 and 7, the steam generating device 3 includes a cylinder 24, a motor B25, a speed reducer 26, a driving gear 27, a driven gear 28 and a hollow shaft 29, the cylinder 24 is horizontally disposed, both left and right ends of the cylinder 24 are closed, a steam outlet hole 30 communicating with the cylinder 24 is disposed at the top of the cylinder 24, a stop valve 31 is connected to the steam outlet hole 30, the other end of the stop valve 31 is connected to a steam inlet end of the turbo generator set 4 through a pipeline, a water replenishing valve 32 is further disposed at the top of the cylinder 24, the hollow shaft 29 axially penetrates through the cylinder 24 from right to left along the cylinder 24, a dynamic sealing member 36 is disposed at a contact position of the hollow shaft 29 and the cylinder 24, a rotary joint I33 and a rotary joint II34 are respectively connected to the left and right ends of the hollow shaft 29, the other end of the rotary joint I33 is connected to the flue gas outlet, the hollow shaft 29 is provided with helical blades 35 along the axial direction thereof in the cylinder 24, the right extending end of the hollow shaft 29 is provided with a driven gear 28, the output shaft of the motor B25 is connected with the input shaft of the speed reducer 26 through a coupler, the output shaft of the speed reducer 26 is provided with a driving gear 27, and the driving gear 27 is meshed with the driven gear 28.

The hearth 5 and the barrel 24 are supported on the ground through a plurality of supporting legs, and a sealed cavity is formed among the vertical partition plate 17, the transverse partition plate 18 and the tank body 14. A through groove 37 is formed in the top of the tank 14, and an output shaft of the motor a15 penetrates through the through groove 37.

s1, opening the water replenishing valve 32, and replenishing a certain amount of water into the cylinder 24 through the water replenishing valve 32; a worker opens a first induced draft fan 39, a second induced draft fan 40 and the combustor 13, the first induced draft fan 39 and the second induced draft fan 40 respectively introduce air into the first air inlet bin 9 and the second air inlet bin 10, and the air enters the hearth 5 to play a role in supporting combustion;

s2, dumping the garbage 42 into the feeding hole 12 by a worker, enabling the garbage 42 to fall onto the first fire grate 7, enabling the first fire grate 7 to convey the household garbage to the right, enabling the household garbage to fall onto the second fire grate 8 from the first fire grate 7, enabling flame sprayed by the burner 13 to burn the household garbage on the second fire grate 8, and discharging slag obtained after burning to the outside of the hearth 5 through the slag discharging hole 11; the garbage 42 moves on the first grate 7 and the second grate 8, so that the movement time of the garbage is prolonged, the garbage is more thoroughly incinerated, and the power generation capacity is improved;

s3, discharging hot flue gas generated by burning garbage from a smoke outlet 6, enabling the hot flue gas with fly ash to enter a tank body 14 through a flue gas inlet 22 of a bag-type dust collector 2, filtering the fly ash carried in the hot flue gas by using a bag 19, enabling the hot flue gas with the fly ash filtered to enter a flue gas absorption tower 41 through a flue gas outlet of the bag-type dust collector 2, a rotary joint I33, an inner cavity of a hollow shaft 29 and a rotary joint II34 in sequence, and absorbing the flue gas through liquid medicine sprayed in the flue gas absorption tower 41;

s4, turning on a motor B25, transmitting the torque of a motor B25 to a driving gear 27 after being reduced by a speed reducer, driving the driving gear 27 to drive a driven gear 28 to rotate, driving a hollow shaft 29 to rotate around the axis of the driven gear 28, driving a helical blade 35 to rotate by the hollow shaft 29, conveying water in a cylinder 24 to the right by the helical blade 35, stirring the water in the conveying process, heating the water in the cylinder 24 by heat on hot flue gas at the moment, changing the heated water into high-temperature steam, allowing the high-temperature steam to pass through a steam outlet hole 30 and a stop valve 31 under the steam pressure to enter a turbo generator unit 4, and generating electricity by the turbo generator unit 4 by using the; wherein, because the motion direction of hot flue gas in hollow shaft 29 is opposite with the motion direction of water in barrel 24 to accelerate being heated of water, realized producing more high temperature steam in the short time, thereby improved the generated energy, helical blade 35 has still stirred water simultaneously, has increased the area of contact of water with hollow shaft 29, has further realized producing more high temperature steam in the short time, further improved the generated energy. In addition, after the cloth bag 19 works for a period of time, the motor A15 can be opened, the motor A15 drives the rotating shaft 21 to rotate, the rotating shaft 21 drives the turntable 20 and the cloth bag 19 on the turntable to do circumferential rotating motion around the axis of the mounting hole, and all fly ashes attached to the cloth bag 19 are thrown to the bottom of the tank body 14 under the action of centrifugal force, so that the cloth bag is effectively prevented from being blocked, the smooth running of power generation is ensured, the cloth bag does not need to be frequently replaced, and the labor intensity of workers is greatly reduced.

Example two: as shown in fig. 8, the present embodiment is different from the first embodiment in that: the smoke outlet 23 is connected with a smoke return pipe 38, the other end of the smoke return pipe 38 is communicated with the top of the hearth 5, and hot smoke discharged by burning garbage enters the hearth 5 through the smoke return pipe 38, so that the garbage is preheated, the time for burning the garbage is shortened, and the purpose of improving the disposing efficiency is achieved.

The foregoing is illustrative of the preferred embodiments of this invention, and it is to be understood that the invention is not limited to the precise form disclosed herein and that various other combinations, modifications, and environments may be resorted to, falling within the scope of the concept as disclosed herein, either as described above or as apparent to those skilled in the relevant art. And that modifications and variations may be effected by those skilled in the art without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. A power generation equipment based on waste incineration, its characterized in that: the system comprises a garbage incinerator (1), a bag-type dust collector (2), a steam turbine generator unit (4) and a steam generating device (3);

the garbage incinerator (1) comprises a hearth (5), a smoke outlet (6) arranged at the top of the hearth (5), a first grate (7) and a second grate (8) which are arranged in the hearth (5), the bottom of the first grate (7) and the bottom of the second grate (8) are respectively provided with a first air inlet bin (9) and a second air inlet bin (10), the bottom of the first air inlet bin (9) is connected with a first induced draft fan (39), the bottom of the second air inlet bin (10) is connected with a second induced draft fan (40), a slag discharge port (11) is further arranged in the hearth (5), the slag discharge port (11) is positioned on the right side of the second grate (8), a feeding hole (12) is formed in the hearth (5), the feeding hole (12) is located right above the first grate (7), a combustor (13) is arranged on the outer wall of the hearth (5), and the combustor (13) is arranged towards the second grate (8);

the bag-type dust collector (2) comprises a tank body (14), a motor A (15) and a discharge valve (16) arranged at the bottom of the tank body (14), wherein a vertical partition plate (17) is fixedly arranged at the top of the tank body (14), a transverse partition plate (18) is fixedly arranged on the vertical partition plate (17), a mounting hole is formed in the transverse partition plate (18), a vertically-arranged bag (19) is arranged in the mounting hole, the upper end of the bag (19) extends above the transverse partition plate (18), a rotary table (20) is fixedly arranged at the top of the bag (19), the lower end of the bag (19) extends below the transverse partition plate (18), the motor A (15) is vertically arranged and fixedly arranged at the top of the tank body (14), an output shaft of the motor A (15) extends downwards into the tank body (14), a rotary shaft (21) is connected onto the output shaft through a coupler, and the bottom of the rotary table (20) is, the rotating shaft (21) is coaxial with the turntable (20); the left side wall and the right side wall of the tank body (14) are respectively provided with a flue gas inlet (22) and a flue gas outlet (23), the flue gas outlet (23) is positioned above the transverse partition plate (18), the flue gas inlet (22) and the vertical partition plate (17) are oppositely arranged, and the flue gas inlet (22) is connected with the smoke outlet (6) through a pipeline; the steam generating device (3) comprises a cylinder body (24), a motor B (25), a speed reducer (26), a driving gear (27), a driven gear (28) and a hollow shaft (29), the cylinder body (24) is horizontally arranged, the left end and the right end of the cylinder body (24) are sealed, a steam outlet hole (30) communicated with the cylinder body (24) is formed in the top of the cylinder body (24), a stop valve (31) is connected to the steam outlet hole (30), the other end of the stop valve (31) is connected with a steam inlet end of the turbo generator unit (4) through a pipeline, a water replenishing valve (32) is further arranged at the top of the cylinder body (24), the hollow shaft (29) axially penetrates through the cylinder body (24) from the right side to the left side, a rotary joint I (33) and a rotary joint II (34) are respectively connected to the left end and the right end of the hollow shaft (29), and the other end of the rotary, the other end of rotary joint II (34) is connected with flue gas absorption tower (41) through the pipe card, it is provided with helical blade (35) along its axial in barrel (24) to lie in hollow shaft (29), and the right side of hollow shaft (29) is extended and is served and install driven gear (28), the output shaft of motor B (25) is through the coupling joint with the input shaft of reduction gear (26), installs driving gear (27) on the output shaft of reduction gear (26), and driving gear (27) and driven gear (28) meshing.

2. A waste incineration based power plant according to claim 1, characterised in that: the cloth bag (19) is in contact with the inner wall of the mounting hole.

3. A waste incineration based power plant according to claim 1, characterised in that: the bottom of the cloth bag (19) is closed, and the cross section of the cloth bag (19) is circular.

4. A waste incineration based power plant according to claim 1, characterised in that: the hearth (5) and the barrel (24) are supported on the ground through a plurality of supporting legs.

5. A waste incineration based power plant according to claim 1, characterised in that: the garbage incinerator (1), the bag-type dust collector (2), the steam generating device (3) and the steam turbine generator unit (4) are sequentially arranged from left to right.

6. A waste incineration based power plant according to claim 1, characterised in that: and a dynamic sealing element (36) is arranged at the contact part of the hollow shaft (29) and the cylinder body (24).

7. A waste incineration based power plant according to claim 1, characterised in that: and a sealed cavity is formed among the vertical partition plate (17), the transverse partition plate (18) and the tank body (14).

8. A waste incineration based power plant according to claim 1, characterised in that: a through groove (37) is formed in the top of the tank body (14), and an output shaft of the motor A (15) penetrates through the through groove (37).

9. A waste incineration based power plant according to claim 1, characterised in that: the smoke outlet (23) is connected with a smoke return pipe (38), and the other end of the smoke return pipe (38) is communicated with the top of the hearth (5).

10. The power generation method based on the waste incineration power generation facility according to any one of claims 1 to 9, characterized in that: it comprises the following steps:

s1, opening the water replenishing valve (32), and replenishing a certain amount of water into the cylinder body (24) through the water replenishing valve (32); a worker opens a first induced draft fan (39), a second induced draft fan (40) and a burner (13), the first induced draft fan (39) and the second induced draft fan (40) respectively introduce air into a first air inlet bin (9) and a second air inlet bin (10), and the air enters a hearth (5) to play a role in supporting combustion;

s2, dumping the garbage (42) into the feeding hole (12) by workers, enabling the garbage (42) to fall onto the first grate (7), conveying the household garbage to the right by the first grate (7), then falling onto the second grate (8) from the first grate (7), ejecting flame from the burner (13) to incinerate the household garbage on the second grate (8), and discharging slag obtained after incineration to the outside of the hearth (5) through the slag discharging hole (11);

s3, discharging hot smoke generated by burning garbage from a smoke outlet (6), enabling the hot smoke carrying with fly ash to enter a tank body (14) through a smoke inlet (22) of a bag-type dust collector (2), filtering the fly ash carried in the hot smoke by a bag (19), enabling the hot smoke carrying with the fly ash to enter a smoke absorption tower (41) through a smoke outlet of the bag-type dust collector (2), a rotary joint I (33), an inner cavity of a hollow shaft (29) and a rotary joint II (34) in sequence, and absorbing the smoke through liquid medicine sprayed in the smoke absorption tower (41);

s4, a motor B (25) is started, the torque of the motor B (25) is transmitted to a driving gear (27) after being reduced by a speed reducer, the driving gear (27) drives a driven gear (28) to rotate, the driven gear (28) drives a hollow shaft (29) to rotate around the axis of the hollow shaft, the hollow shaft (29) drives a helical blade (35) to rotate, the helical blade (35) conveys water in a cylinder (24) to the right, the water is stirred in the conveying process, the heat on hot flue gas heats the water in the cylinder (24), the water is heated to become high-temperature steam, the high-temperature steam passes through a steam outlet hole (30) and a stop valve (31) under the steam pressure to enter a turbo generator unit (4), and the turbo generator unit (4) generates electricity by utilizing the steam;