CN112413623B - Flue smoke exhaust system - Google Patents

Abstract

The invention discloses a flue smoke discharging system, comprising: the economizer flue and the air preheater flue are vertically arranged and communicated with each other at the bottom end, so that the flue gas exhausted from the tail end of the boiler enters the economizer flue downwards from the top end of the economizer flue, enters the bottom end of the air preheater flue from the bottom end of the economizer flue, and then enters the inertial separator or the cloth bag dust removal system upwards from the top end of the air preheater flue. The economizer flue is internally provided with the economizers at intervals along the vertical direction of the economizer flue, and the air preheater flue is internally provided with the air preheater at intervals along the vertical direction of the air preheater flue. The flue gas quantity regulating device is used for regulating the quantity of the smoke directly entering the air preheater flue from the flue gas economizer, so that the outlet temperature of the air preheater arranged at the downstream of the short joint point of the flue gas economizer and the flue gas preheater is higher than the condensation point temperature of the acid.

Description

Flue smoke exhaust system

Technical Field

The invention relates to the technical field of biological generator sets, in particular to a flue smoke discharging system.

Background

After the biomass fuel is combusted, the flue gas generally contains sulfur dioxide, sulfur trioxide, carbon monoxide, sodium ions and the like, and in the flue gas emission process, an air preheater is arranged in a flue to cool the flue gas and recover energy.

When the flue gas flows through the air preheater, because of the reduction of temperature, sulfur dioxide, sulfur trioxide and the like are easy to form sodium sulfate with sodium ions and water vapor, the sodium sulfate is mixed with ash in the flue gas to form an acid condensation (the temperature of the acid condensation point is generally 130-140 ℃) plate compound, carbon monoxide and the like are easy to form sodium hydroxide with the water vapor, the sodium hydroxide is mixed with ash in the flue gas to form a water condensation (the temperature of the water condensation point is generally 80-90 ℃) plate compound, and the plate compounds are hardened on the wall surface and the outer wall surface of a channel of the air preheater, so that the air preheater is blocked, the flue gas circulation resistance is increased, the load and the current of a draught fan set at a flue gas discharge outlet are increased, and the generating capacity of the generating set is reduced.

Disclosure of Invention

The invention provides a flue smoke discharging system which aims at solving the technical problem that an existing flue air preheater is easy to be blocked due to condensation plate matters.

The technical scheme adopted by the invention is as follows:

A flue stack system comprising: the economizer flue and the air preheater flue are vertically arranged, the bottom ends of the economizer flue are communicated, so that flue gas exhausted from the tail end of the boiler enters the economizer flue downwards from the top end of the economizer flue, enters the bottom end of the air preheater flue from the bottom end of the economizer flue, and then enters the inertial separator or the cloth bag dust removal system upwards from the top end of the air preheater flue; the economizer flue is internally provided with an economizer at intervals along the vertical direction of the economizer flue, and the air preheater flue is internally provided with an air preheater at intervals along the vertical direction of the air preheater flue; the flue gas in the economizer flue is directly fed into the air preheater flue, and a flue gas quantity regulating device for controlling the on-off state and the flow area of the flue gas is arranged in the flue gas economizer flue so as to regulate the flue gas quantity fed into the air preheater flue directly from the economizer flue, and further the outlet temperature of the air preheater arranged at the downstream of the short joint of the flue gas economizer flue and the air preheater flue is higher than the temperature of the acid condensation point.

Further, the coal-saving short-circuit flue is a hollow pipe with two ends communicated, the air inlet end of the coal-saving short-circuit flue is communicated with the side wall surface of the economizer flue, and the air outlet end of the coal-saving short-circuit flue is communicated with the side wall surface of the air preheater flue; the smoke quantity adjusting device is arranged in a pipeline of the coal-saving short-circuit flue.

Further, a plurality of flue gas flow channels which are sequentially arranged along the width direction are arranged in the inner channel of the coal-saving short-circuit flue, the air inlet end of each flue gas flow channel is communicated with the side wall surface of the coal economizer flue, and the air outlet end of each flue gas flow channel is communicated with the side wall surface of the air preheater flue; a group of smoke quantity adjusting devices are arranged in each smoke flow passage.

Further, the smoke quantity adjusting device comprises a driving shaft, an adjusting plate for adjusting the flow area of the coal-saving short-circuit flue, and a driving hand wheel or a driving source for driving the driving shaft to rotate; the driving shaft is perpendicular to the outer wall surface of the coal-saving short-circuit flue, and is rotatably penetrated with an inner channel of the coal-saving short-circuit flue or a flue gas flow channel which is correspondingly arranged; the adjusting plate is arranged on the outer circle of the driving rotating shaft and is positioned in an inner channel of the coal-saving short-circuit flue or a flue gas flow channel correspondingly arranged; the driving hand wheel or the driving source is connected with the overhanging end of the coal-saving short-circuit flue with the driving shaft overhanging.

Further, the smoke quantity adjusting device comprises an installing support connected to the outer wall of the coal-saving short-circuit flue, an adjusting plate for adjusting the flow area of the coal-saving short-circuit flue and a driving source for driving the adjusting plate to linearly slide; the outer wall surface of the coal-saving short-circuit flue is provided with a mounting groove communicated with an inner channel or a flue gas flow channel correspondingly arranged; the adjusting plate can be arranged in the corresponding installation groove in a drawable sealing way and extends into an inner channel or a flue gas flow channel of the coal-saving short-circuit flue; the driving source is arranged on the mounting support and is connected with the overhanging end of the adjusting plate overhanging coal-saving short-circuit flue.

Further, a plurality of partition boards which are sequentially and alternately distributed along the width direction of the inner channel of the coal-saving short-circuit flue are arranged in the inner channel; and a flue gas flow passage is respectively formed between the inner wall surface of the coal-saving short-circuit flue and the adjacent partition boards and between the adjacent two partition boards.

Further, the coal-saving short-circuit flue is horizontally arranged; the air inlet end of the coal-saving short-circuit flue is communicated with the side wall surface of the economizer flue between two adjacent groups of economizers, and the air outlet end of the coal-saving short-circuit flue is communicated with the side wall surface of the air preheater flue between two adjacent groups of air preheaters.

Further, the coal-saving short flue is coated with an insulating layer or an insulating coating.

Further, the flue smoke discharging system further comprises an inertial separator for carrying out inertial separation on the smoke and a cloth bag dust removing system for carrying out cloth bag dust removal on the smoke, an air inlet of the inertial separator is communicated with an air inlet flue, the air inlet of the air inlet flue is communicated with an exhaust end of the air preheater flue, an exhaust port of the inertial separator is communicated with an exhaust flue, and an exhaust port of the exhaust flue is communicated with the cloth bag dust removing system; the flue gas treatment system further comprises a short-circuit bypass flue used for communicating the air inlet flue and the exhaust flue, two ends of the short-circuit bypass flue are respectively connected with the air inlet flue and the exhaust flue, and a first opening adjusting device used for controlling the flow area of the short-circuit bypass flue is arranged in the short-circuit bypass flue; the exhaust flue is provided with a second opening adjusting device for controlling the flow area, and the second opening adjusting device is positioned at the upstream of the communication position of the short-circuit bypass flue and the exhaust flue.

Further, the first opening adjusting device comprises a first installation rotating shaft, a first adjusting piece for adjusting the opening of the short-circuit bypass flue, and a first driving wheel or a first driver for driving the first installation rotating shaft to rotate; the first installation rotating shaft is perpendicular to the outer wall surface of the short-circuit bypass flue and penetrates through the short-circuit bypass flue in a rotating mode; the first adjusting piece is arranged on the outer circle of the first installation rotating shaft and is positioned in the short-circuit bypass flue; the first driving wheel or the first driver is connected with the overhanging end of the overhanging short circuit bypass flue of the first installation rotating shaft.

The invention has the following beneficial effects:

when the flue smoke discharging system works, under the normal condition, smoke generated by burning biomass fuel in a stove is discharged into the economizer flue from the top end of the economizer flue through the tail end of the boiler, the smoke in the economizer flue sequentially passes through all the economizers from top to bottom, enters the bottom end of the air preheater flue from the bottom end of the economizer flue, sequentially passes through all the air preheaters from bottom to top, and finally is discharged into the inertial separator and/or the cloth bag dust removing system from the top end of the air preheater flue; however, when the smoke quantity adjusting device enables the coal-saving short-circuit flue to be opened, part of smoke in the coal-saving short-circuit flue directly enters the air preheater flue through the coal-saving short-circuit flue and then is continuously moved upwards along the air preheater flue, and as the smoke of the short-circuit part directly enters the air preheater flue through the coal-saving short-circuit flue instead of entering the air preheater flue from the bottom end of the coal-saving short-circuit flue, the temperature is higher, in the actual design process, only the short-circuit positions of the coal-saving short-circuit flue, the coal-saving short-circuit flue and the air preheater flue are reasonably controlled, the outlet temperature of the air preheater arranged at the downstream of the short-circuit point of the coal-saving short-circuit flue and the air preheater flue is ensured to be higher than the acid condensation point temperature, so that the formation of acid condensation and water condensation is effectively prevented, the problem of air preheater blockage is effectively relieved, the smoke circulation resistance is reduced, the load and current of an induced air unit at a smoke discharge outlet are reduced, and the generating capacity of the generating set is improved; on the other hand, the smoke volume adjusting device can flexibly adjust the flow of the coal-saving short-circuit flue, is flexible to adjust and has stronger adaptability.

In addition to the objects, features and advantages described above, the present invention has other objects, features and advantages. The present invention will be described in further detail with reference to the drawings.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention. In the drawings:

FIG. 1 is a schematic view of a part of the flue gas discharging system according to a preferred embodiment of the present invention;

FIG. 2 is a schematic top view of the structure of FIG. 1;

FIG. 3 is a schematic view of a part of the flue gas discharging system according to a preferred embodiment of the present invention;

fig. 4 is a schematic structural view of an ash conveying system in a flue gas discharging system according to a preferred embodiment of the present invention.

Description of the drawings

30. An electric vibrator; 31. an ash warehouse; 32. an induced air unit; 33. a first ash conveying pipe group; 331. a first air inlet pipeline; 332. a first ash feed pipeline; 333. a first fluidizing line; 334. a first exhaust line; 34. a first ash discharging device; 341. a first ash hopper; 342. a first ash discharging pipe; 343. a first switching valve; 344. a first transfer pump; 345. a first fluidising disc; 346. a first variable frequency regulating valve; 35. a first Roots blower; 36. a first check valve; 37. a first pressure transmitter; 38. a compressed air purge tube; 39. a second switching valve; 40. a third Roots blower; 41. a second ash conveying pipe group; 411. a second air inlet pipeline; 412. a second ash conveying pipeline; 413. a second fluidizing line; 414. a second exhaust line; 42. a second ash discharging device; 421. a second ash hopper; 422. a second ash discharging pipe; 423. a third switching valve; 424. a second transfer pump; 425. a second fluidizer disk; 426. a second variable frequency regulating valve; 43. a second Roots blower; 44. a second check valve; 45. a second pressure transmitter; 46. a fifth switching valve; 47. a communication pipeline; 48. a sixth switching valve; 49. a manual gate valve; 51. an inertial separator; 52. an air inlet flue; 53. an exhaust flue; 54. shorting the bypass flue; 55. a first opening degree adjusting device; 56. a second opening degree adjusting device; 57. an air preheater; 61. a flue of the coal economizer; 62. an air preheater flue; 63. an economizer; 65. coal-saving short-circuit flue; 651. a flue gas flow passage; 66. a smoke amount adjusting device; 67. a partition board.

Detailed Description

Embodiments of the invention are described in detail below with reference to the attached drawing figures, but the invention can be practiced in a number of different ways, as defined and covered below.

Referring to fig. 1, a preferred embodiment of the present invention provides a flue gas extraction system comprising: the economizer flue 61 and the air preheater flue 62 are vertically arranged and communicated at the bottom end, so that the flue gas discharged from the tail end of the boiler enters the economizer flue 61 downwards from the top end of the economizer flue 61, enters the air preheater flue 62 from the bottom end of the economizer flue 61, and then enters the inertial separator or the cloth bag dust removal system upwards from the top end of the air preheater flue 62. The economizer flue 61 is provided with the economizer 63 at intervals in the vertical direction thereof, and the air preheater 62 is provided with the air preheater 57 at intervals in the vertical direction thereof. A coal-saving short-circuit flue 65 is also communicated between the coal-saving flue 61 and the air preheater flue 62, so that the flue gas in the coal-saving flue 61 directly enters the air preheater flue 62, and a flue gas quantity adjusting device 66 for controlling the on-off state and the flow area of the flue gas is arranged in the coal-saving short-circuit flue 65, so as to adjust the flue gas quantity of the flue gas directly entering the air preheater flue 62 from the coal-saving flue 61, and further, the outlet temperature of the air preheater 57 arranged at the downstream of the short-circuit point of the coal-saving short-circuit flue 65 and the air preheater flue 62 is higher than the acid condensation point temperature.

When the flue gas exhausting system works, under the normal condition of flue gas generated by biomass fuel combustion in a stove, the flue gas is exhausted into the economizer flue 61 from the top end of the economizer flue 61 through the tail end of a boiler, the flue gas in the economizer flue 61 sequentially passes through all the economizers 63 from top to bottom, then enters the bottom end of the air preheater flue 62 from the bottom end of the economizer flue 61, and the flue gas in the air preheater flue 62 sequentially passes through all the air preheaters 57 from bottom to top, and finally is exhausted into the inertial separator and/or the cloth bag dust removing system from the top end of the air preheater flue 62; however, when the smoke volume adjusting device 66 opens the coal-saving short-circuit flue 65, part of the smoke in the coal-saving flue 61 directly enters the air preheater flue 62 through the coal-saving short-circuit flue 65 and then continues to move upwards along the air preheater flue 62, and as the smoke of the short-circuit part directly enters the air preheater flue 62 through the coal-saving short-circuit flue 65 instead of entering the air preheater flue 62 from the bottom end of the coal-saving flue 61, the temperature is higher, and in the actual design process, only the short-circuit positions of the coal-saving short-circuit flue 65, the coal-saving flue 61 and the air preheater flue 62 are reasonably controlled, so that the outlet temperature of the air preheater 57 arranged at the downstream of the short-circuit point of the coal-saving short-circuit flue 65 and the air preheater flue 62 is ensured to be higher than the temperature of the acid condensation point, the formation of the acid condensation and the water condensation is effectively prevented, the blocking problem of the air preheater 57 is effectively relieved, the smoke flow resistance is reduced, the load and current of an induced air generator set at a smoke discharge outlet is reduced, and the generating capacity of the generator set is improved; on the other hand, the smoke volume adjusting device 66 can flexibly adjust the flow volume of the coal-saving short-circuit flue 65, is flexible to adjust and has stronger adaptability.

Alternatively, in the first embodiment of the coal-saving short flue 65, not shown in the drawings, the coal-saving short flue 65 is a hollow pipe with two ends being communicated, and the air inlet end of the coal-saving short flue 65 is communicated with the side wall surface of the economizer flue 61, and the air outlet end of the coal-saving short flue 65 is communicated with the side wall surface of the air preheater flue 62. The smoke volume adjusting device 66 is arranged in the pipeline of the coal-saving short-circuit flue 65, and the embodiment is suitable for the small-pipe-diameter coal-saving short-circuit flue 65 with the diameter not larger than 1000mm directly so as to better operate the action of the smoke volume adjusting device 66.

Alternatively, as shown in fig. 1 and 2, in the second embodiment of the coal-saving short flue 65, a plurality of flue gas channels 651 sequentially arranged along the width direction of the flue gas channels are provided in the inner channel of the coal-saving short flue 65, the air inlet end of each flue gas channel 651 is communicated with the side wall surface of the coal economizer flue 61, and the air outlet end of each flue gas channel 651 is communicated with the side wall surface of the air preheater flue 62. A group of smoke volume adjusting devices 66 are arranged in each smoke flow channel 651, and the second embodiment is suitable for the large-pipe-diameter coal-saving short-circuit flue 65 with the diameter directly larger than 1000mm so as to better operate the actions of the smoke volume adjusting devices 66.

Specifically, in the first and second embodiments, the smoke amount adjusting device 66 includes a driving shaft, an adjusting plate for adjusting the flow area of the coal-saving short flue 65, and a driving hand wheel or driving source for driving the driving shaft to rotate. When the inner channel of the coal-saving short-circuit flue 65 is formed by a flue gas flow channel 651, the outer wall surface of the coal-saving short-circuit flue 65 is vertically rotated by the driving shaft to penetrate through the inner channel of the coal-saving short-circuit flue 65, and the flue gas flow channel 651 at the corresponding position is rotated by the outer wall surface of the coal-saving short-circuit flue 65. The regulating plate is installed on the excircle of driving the pivot, and is located the interior passageway of economizing coal short circuit flue 65, and when the interior passageway of economizing coal short circuit flue 65 comprises flue gas runner 651, then the regulating plate is located the flue gas runner 651 that corresponds the setting. The driving hand wheel or driving source is connected with the overhanging end of the coal-saving short flue 65. In this embodiment, the driving hand wheel is a manual wheel for manual control operation, the driving source includes a driving motor, and a speed reducer connected to an output shaft of the driving motor, and an output end of the speed reducer is fixed to the driving shaft. When the coal-saving short-circuit flue 65 is adjusted, the driving hand wheel or the driving source drives the driving shaft to rotate, and when the driving shaft rotates, the adjusting plate is driven to rotate by an angle in the inner channel or the flue gas flow channel 651 of the coal-saving short-circuit flue 65, and then the opening of the inner channel or the flue gas flow channel 651 of the coal-saving short-circuit flue 65 is made to be different according to the difference of the rotation angles of the adjusting plate. Preferably, the shape of the adjusting plate is matched with the cross-sectional shape of the coal-saving short-circuit flue 65 or the flue gas flow channel 651, when the adjusting plate is perpendicular to the axial direction of the coal-saving short-circuit flue 65 or the flue gas flow channel 651, the corresponding coal-saving short-circuit flue 65 or flue gas flow channel 651 is closed, and when the adjusting plate is parallel to the axial direction of the coal-saving short-circuit flue 65 or the flue gas flow channel 651, the opening of the corresponding coal-saving short-circuit flue 65 or flue gas flow channel 651 is maximum.

Specifically, in the first and second embodiments, the smoke amount adjusting device 66 includes a mounting support connected to the outer wall of the coal-saving short flue 65, an adjusting plate for adjusting the flow area of the coal-saving short flue 65, and a driving source for driving the adjusting plate to slide linearly. The outer wall surface of the coal-saving short flue 65 is provided with a mounting groove communicated with an inner channel or a flue gas flow channel 651 correspondingly arranged. The adjusting plate is installed in the installation groove correspondingly arranged in a drawable sealing mode and extends to the inner channel of the coal-saving short-circuit flue 65, and when the inner channel of the coal-saving short-circuit flue 65 is formed by the flue gas flow channel 651, the adjusting plate extends to the flue gas flow channel 651. The driving source is arranged on the mounting support and is connected with the overhanging end of the adjusting plate overhanging coal-saving short-circuit flue 65. In this alternative scheme, the drive source is the telescopic cylinder, and the drive end of telescopic cylinder links to each other with the regulating plate. When the adjusting plate is completely inserted into the inner channel or the smoke flow channel 651 of the coal-saving short-circuit flue 65, the corresponding coal-saving short-circuit flue 65 or the smoke flow channel 651 is closed, and when the adjusting plate is pulled away from the coal-saving short-circuit flue 65, the opening of the corresponding coal-saving short-circuit flue 65 or the smoke flow channel 651 is maximum. Preferably, the sections of the coal-saving short-circuit flue 65 and the flue gas flow channel 651 are square, and the shape of the adjusting plate is matched with the section shape of the coal-saving short-circuit flue 65 or the flue gas flow channel 651 which are correspondingly arranged.

Alternatively, as shown in fig. 2, a plurality of partition plates 67 are arranged in the inner channel of the coal-saving short flue 65 at intervals in sequence along the width direction thereof. The flue gas flow passages 651 are respectively formed between the inner wall surface of the coal-saving short-circuit flue 65 and the adjacent partition plates 67 and between the adjacent two partition plates 67, so that the coal-saving short-circuit flue 65 is simple to manufacture and is suitable for the coal-saving short-circuit flue 65 with the pipe diameter of more than 1000 mm. In other embodiments, the number of the coal-saving short-circuiting flues 65 is multiple, the multiple coal-saving short-circuiting flues 65 are arranged at intervals, two ends of each coal-saving short-circuiting flue 65 are respectively connected with the coal economizer flue 61 and the air preheater flue 62, and a group of smoke amount adjusting devices 66 are arranged in the pipeline of each coal-saving short-circuiting flue 65.

Alternatively, as shown in fig. 1, the coal-saving short flue 65 is arranged horizontally. The air inlet end of the coal-saving short-circuit flue 65 is communicated with the side wall surface of the economizer flue 61 between two adjacent groups of the economizers 63, and the air outlet end of the coal-saving short-circuit flue 65 is communicated with the side wall surface of the air preheater flue 62 between two adjacent groups of the air preheaters 57.

Preferably, the coal-saving short flue 65 is coated with a heat-insulating layer or a heat-insulating coating, the main material of the heat-insulating layer is aluminum silicate heat-insulating cotton, and the main component of the heat-insulating coating is aluminum silicate. The heat preservation layer or the heat preservation coating is used for only preserving heat of the coal-saving short-circuit flue 65 so as to reduce the reduction of the temperature of the short-circuit flue gas of the coal-saving short-circuit flue 65 and avoid scalding when operators touch the coal-saving short-circuit flue 65 by mistake.

Optionally, as shown in fig. 3, the flue gas exhaust system further includes an inertial separator 51 for performing inertial separation on the flue gas, and a bag-type dust removal system for performing bag-type dust removal on the flue gas, wherein an air inlet of the inertial separator 51 is communicated with an air inlet flue 52, an air inlet of the air inlet flue 52 is communicated with an exhaust end of an air preheater flue 62, an exhaust port of the inertial separator 51 is communicated with an exhaust flue 53, and an exhaust port of the exhaust flue 53 is communicated with the bag-type dust removal system. The flue gas treatment system further comprises a short-circuit bypass flue 54 used for communicating the air inlet flue 52 and the exhaust flue 53, two ends of the short-circuit bypass flue 54 are respectively connected with the air inlet flue 52 and the exhaust flue 53, and a first opening adjusting device 55 used for controlling the flow area of the short-circuit bypass flue 54 is arranged in the short-circuit bypass flue 54. The exhaust flue 53 is provided with a second opening degree adjusting device 56 for controlling the flow area, and the second opening degree adjusting device 56 is positioned at the upstream of the communication position of the short-circuit bypass flue 54 and the exhaust flue 53.

When the flue smoke discharging system works, smoke discharged from the top end of the air preheater flue 57 enters the air inlet flue 52, the smoke in the air inlet flue 52 is divided into two paths, one path of smoke enters the inertial separator 51 from the air outlet end of the air inlet flue 52, and the other path of smoke enters the short-circuit bypass flue 54; when the first opening adjusting device 55 enables the short-circuit bypass flue 54 to be opened and the second opening adjusting device 56 enables the exhaust flue 53 between the inertial separator 51 and the short-circuit bypass flue 54 to be closed, flue gas in the air inlet flue 52 completely enters the bag-type dust removing system through the short-circuit bypass flue 54; when the first opening adjusting device 55 enables the short-circuit bypass flue 54 to be closed and the second opening adjusting device 56 enables the exhaust flue 53 between the inertial separator 51 and the short-circuit bypass flue 54 to be opened, flue gas in the air inlet flue 52 passes through the inertial separator 51 and the exhaust flue 53 and then enters the bag-type dust removing system; when the first opening adjusting device 55 opens the short-circuit bypass flue 54 and the second opening adjusting device 56 opens the exhaust flue 53 between the inertial separator 51 and the short-circuit bypass flue 54, part of the flue gas in the air inlet flue 52 enters the bag-type dust removing system through the short-circuit bypass flue 54, and the other part of the flue gas enters the bag-type dust removing system after passing through the inertial separator 51 and the exhaust flue 53.

When the flue smoke discharging system works, the direction, the split flow and the like of the flue gas in the air inlet flue 52 can be flexibly adjusted by arranging the short-circuit bypass flue 54, the first opening adjusting device 55 and the second opening adjusting device 56, so that the technical problem that the pressure of a flue pipeline system is increased due to the fact that the flue gas in the air inlet flue 52 passes through the inertial separator 51 and then outwards is solved, the separation, the dust removal and the like of the flue gas are flexible and controllable, the technical problem that the ash conveying of a pipeline of the flue smoke discharging system is unsmooth is solved, the front-rear pressure difference of each ash conveying loop is reduced, the ash conveying efficiency is improved, the whole generator set stably and reliably operates, the current quantity of an induced air set at a conveying outlet can be effectively reduced, the working loads of the induced air set, the inertial separator 51 and the like are reduced, the service life is prolonged, and the cost required for ash conveying is reduced; on the other hand, the first opening adjusting device 55 can flexibly adjust the flow of the short-circuit bypass flue 54, and the second opening adjusting device 56 can flexibly adjust the opening of the exhaust flue 53 between the inertial separator 51 and the short-circuit bypass flue 54, so that the adjustment is more flexible and the adaptability is stronger.

Alternatively, as shown in fig. 3, in a first embodiment of the first opening adjusting device 55, the first opening adjusting device 55 includes a first installation shaft, a first adjusting piece for adjusting the opening of the short-circuit bypass flue 54, and a first driving wheel or a first driver for driving the first installation shaft to rotate. The first installation pivot is perpendicular to the outer wall surface of short circuit bypass flue 54 and rotates wears to establish short circuit bypass flue 54. The first adjusting piece is arranged on the outer circle of the first installation rotating shaft and is positioned in the short-circuit bypass flue 54. The first drive wheel or first driver is connected to the overhanging end of the first mounting shaft overhanging short bypass flue 54. In this alternative scheme, first drive wheel is the manual wheel that supplies staff control operation, and first driver includes driving motor, and the reduction gear that links to each other with driving motor's output shaft, and the output of reduction gear is fixed with first installation pivot. During adjustment, the first driving wheel or the first driver drives the first installation rotating shaft to rotate, and when the first installation rotating shaft rotates, the first adjusting piece is driven to rotate at an angle in the inner channel of the short-circuit bypass flue 54, and according to the difference of the rotation angles of the first adjusting piece, the opening degrees of the inner channel of the short-circuit bypass flue 54 are further different. Preferably, the shape of the first adjusting piece is matched with the cross-sectional shape of the short-circuit bypass flue 54, when the first adjusting piece is perpendicular to the axial direction of the short-circuit bypass flue 54, the short-circuit bypass flue 54 is closed, and when the first adjusting piece is parallel to the axial direction of the short-circuit bypass flue 54, the opening of the short-circuit bypass flue 54 reaches the maximum.

Alternatively, as shown in fig. 3, in a second embodiment of the first opening adjusting device 55, the first opening adjusting device 55 includes a mounting support connected to an outer wall of the short-circuit bypass flue 54, a first adjusting piece for adjusting the opening of the short-circuit bypass flue 54, and a first driver for driving the first adjusting piece to slide linearly. The outer wall surface of the short bypass flue 54 is provided with a first mounting groove communicated with the inner channel thereof. The first adjusting piece can be installed in the first installation groove in a drawing type sealing mode, and the connecting end of the first adjusting piece extends out of the short-circuit bypass flue 54. The first driver is arranged on the mounting support and is connected with the connecting end of the first adjusting piece. In this alternative, the first driver is a telescopic cylinder, and the driving end of the telescopic cylinder is connected to the first adjusting plate. During adjustment, the telescopic cylinder drives the first adjusting piece to draw and slide in the first mounting groove, when the first adjusting piece is completely inserted into the inner channel of the short-circuit bypass flue 54, the short-circuit bypass flue 54 is closed, and when the first adjusting piece is pulled away from the short-circuit bypass flue 54, the opening of the short-circuit bypass flue 54 is maximum. Preferably, the cross section of the shorting bypass flue 54 is square, and the shape of the first adjusting piece is matched with the cross section of the shorting bypass flue 54.

Alternatively, as shown in fig. 3, in the first embodiment of the second opening adjusting device 56, the second opening adjusting device 56 includes a second installation shaft, a second adjusting piece for adjusting the opening of the exhaust flue 53, and a second driving wheel or a second driver for driving the second installation shaft to rotate. The second installation rotating shaft is perpendicular to the outer wall surface of the exhaust flue 53 and penetrates through the exhaust flue 53 in a rotating mode. The second adjusting piece is arranged on the outer circle of the second installation rotating shaft and is positioned in the exhaust flue 53. The second drive wheel or second drive is connected to the overhanging end of the second mounting shaft overhanging exhaust flue 53. In this alternative scheme, the second drive wheel is the manual wheel that supplies staff control operation, and the second driver includes driving motor, and the reduction gear that links to each other with driving motor's output shaft, and the output of reduction gear is fixed with the second installation pivot. During adjustment, the second driving wheel or the second driver drives the second installation rotating shaft to rotate, and when the second installation rotating shaft rotates, the second adjusting piece is driven to rotate at an angle in the inner channel of the exhaust flue 53, and according to the difference of the rotation angles of the second adjusting piece, the opening degree of the inner channel of the exhaust flue 53 is further made to be different. Preferably, the shape of the second regulating piece is matched with the cross-sectional shape of the exhaust flue 53, when the second regulating piece is perpendicular to the axial direction of the exhaust flue 53, the exhaust flue 53 is closed, and when the second regulating piece is parallel to the axial direction of the exhaust flue 53, the opening degree of the exhaust flue 53 is maximized.

Alternatively, as shown in fig. 3, in a second embodiment of the second opening adjusting device 56, the second opening adjusting device 56 includes a mounting support connected to an outer wall of the exhaust flue 53, a second adjusting piece for adjusting the opening of the exhaust flue 53, and a second driver for driving the second adjusting piece to slide linearly. The outer wall surface of the exhaust flue 53 is provided with a second mounting groove communicating with the inner passage thereof. The second adjusting piece can be arranged in the second mounting groove in a drawable sealing mode, and the connecting end of the second adjusting piece extends out of the exhaust flue 53. The second driver is arranged on the mounting support and is connected with the connecting end of the second adjusting piece. In this alternative, the second driver is a telescopic cylinder, and the drive end of the telescopic cylinder is connected to the second adjusting plate. During adjustment, the telescopic cylinder drives the second adjusting piece to draw and slide in the second mounting groove, when the second adjusting piece is completely inserted into the inner channel of the exhaust flue 53, the exhaust flue 53 is closed, and when the second adjusting piece is pulled away from the exhaust flue 53, the opening of the exhaust flue 53 is maximum. Preferably, the cross section of the exhaust flue 53 is square, and the shape of the second adjusting piece matches the cross section of the exhaust flue 53.

Alternatively, in the third embodiment of both the first opening degree adjusting device 55 and the second opening degree adjusting device 56, both the first opening degree adjusting device 55 and the second opening degree adjusting device are pipe control valves, and the pipe control valves adopt a regulating valve structure for controlling the opening degree of the pipe, which is commonly used in the prior art.

Optionally, as shown in fig. 3, an air preheater 57 for energy exchange is provided in the inner channel of the air inlet section of the air inlet flue 52, and by providing the air preheater 57, the energy of the discharged flue gas is recovered, the temperature of the flue gas is reduced, and the subsequent separation and dust removal processes are performed. The short bypass flue 54 is located downstream of the air preheater 57 in communication with the air intake flue 52 so that the energy recovered cooled flue gas reenters the inertial separator 51 and bag house dust removal system.

Optionally, as shown in fig. 4, the flue gas discharging system of the present invention further includes an ash conveying system, where the ash conveying system includes: the ash bin 31 is used for containing the output ash, and the ash bin 31 is communicated with a blower unit 32 for pulling the ash forward into the ash bin 31. The ash bin 31 is also communicated with a multi-pipe dust removing and ash conveying pipeline and a cloth bag dust removing and ash conveying pipeline, the multi-pipe dust removing and ash conveying pipeline is used for conveying the coarse ash separated from the flue and entering the multi-pipe dust removing system to the ash bin 31, and the cloth bag dust removing and ash conveying pipeline is used for conveying the coarse ash separated from the cloth bag dust removing system to the ash bin 31. The multi-pipe dust-removing ash-conveying pipeline and the cloth-bag dust-removing ash-conveying pipeline are arranged in parallel, and are respectively provided with a blowing device for blowing ash to move towards the ash warehouse 31.

When the biological generator set works, smoke generated after biomass fuel in the cooking range is combusted enters a flue, ash in the smoke is deposited in the flue through the flue, and coarse ash enters a multi-pipe dust removing system and fine ash enters a cloth bag dust removing system through the effect of an inertial separator arranged in the flue, the fine ash is directly discharged into the atmosphere through a chimney under the separating effect of the cloth bag dust removing system, and the coarse ash is retained in the cloth bag dust removing system; after the ash conveying system is started, ash in the multi-pipe dust removing system enters a multi-pipe dust removing and conveying pipeline and is blown and pulled into the ash warehouse 31 under the action of a blowing device of the multi-pipe dust removing and conveying pipeline and a blower unit 32 communicated with the ash warehouse 31, so that ash operation is realized; the ash in the bag-type dust removing system enters the bag-type dust removing and conveying pipeline and is blown and pulled into the ash warehouse 31 under the action of a blowing device of the bag-type dust removing and conveying pipeline and a blower unit 32 communicated with the ash warehouse 31, so that ash operation is realized; the soot in the soot silo 31 is eventually transported by the tanker truck.

According to the ash conveying system, the multi-pipe dust removing and conveying pipeline and the cloth bag dust removing and conveying pipeline are arranged in parallel, and the multi-pipe dust removing and conveying pipeline and the cloth bag dust removing and conveying pipeline are respectively provided with the blowing device for blowing ash to move towards the ash warehouse 31, so that the multi-pipe dust removing and conveying pipeline forms an independent ash conveying loop under the action of the blowing device and the induced air unit 32 communicated with the ash warehouse 31, the cloth bag dust removing and conveying pipeline also forms an independent ash conveying loop under the action of the blowing device and the induced air unit 32 communicated with the ash warehouse 31, and the two ash conveying loops are not interfered with each other during operation, so that the technical problem that the ash conveying pipeline of the cloth bag dust remover and the multi-pipe dust remover is easy to convey is solved, the front-back pressure difference of each ash conveying loop is reduced, the ash conveying efficiency is improved, the whole generator set is enabled to stably and reliably operate, the current quantity of the induced air unit at a conveying outlet is effectively reduced, the working load of the induced air unit is prolonged, the service life of the induced air unit is prolonged, and the required cost of ash conveying is reduced.

Alternatively, as shown in fig. 4, the multi-pipe dust removal ash conveying pipe includes a first ash conveying pipe group 33 for conveying ash, a plurality of groups of first ash discharging devices 34 for discharging coarse ash in the multi-pipe dust removal system, and a first roots blower 35 serving as a blowing device. In this alternative, the first Roots blower 35 is a Roots blower. The air inlet end of the first ash conveying pipe group 33 is connected with a first Roots blower 35, and the air outlet end of the first ash conveying pipe group 33 is communicated with the ash warehouse 31. The first ash discharging devices 34 are sequentially arranged at intervals along the ash conveying direction, and each first ash discharging device 34 is respectively communicated with the first ash conveying pipe group 33.

In this alternative, as shown in fig. 4, the first ash conveying pipe group 33 includes a first air inlet pipe 331, a first ash conveying pipe 332 for blowing the ash discharged from the first ash discharging device 34 forward, a first fluidizing pipe 333 for fluidizing the ash hardened in the first ash discharging device 34, and a first air exhaust pipe 334. The air inlet end of the first air inlet pipeline 331 is connected with the first Roots blower 35, the air outlet end of the first air inlet pipeline 331 is connected with the air inlet end of the first ash conveying pipeline 332 and the air inlet end of the first fluidizing pipeline 333 respectively, the air outlet end of the first ash conveying pipeline 332 and the air outlet end of the first fluidizing pipeline 333 are connected with the air inlet end of the first air exhaust pipeline 334 respectively, and the air outlet end of the first air exhaust pipeline 334 is communicated with the ash warehouse 31. The side air inlet and the side air outlet of the first ash discharging device 34 are respectively communicated with the first ash feeding pipeline 332, and the bottom air inlet of the first ash discharging device 34 is communicated with the first fluidization pipeline 333.

In this alternative, as shown in fig. 4, the first ash discharging device 34 includes a first ash hopper 341 for holding ash, a first ash discharging pipe 342 for discharging ash, a first switching valve 343 for controlling the on-off of the first ash discharging pipe 342, a first transfer pump 344 for pushing the discharged ash forward, and a first fluidization plate 345 for fluidizing the hardened ash. The first ash discharging pipe 342 is vertically arranged, and the feeding end of the first ash discharging pipe 342 is communicated with the first ash discharging hopper 341, and the discharging end of the first ash discharging pipe 342 is communicated with the first conveying pump 344. The first switching valve 343 is connected in the line of the first lower ash pipe 342. The side air inlet and the side air outlet of the first transfer pump 344 are respectively communicated with the first ash feed pipe 332. The first fluidization plate 345 is disposed at the bottom of the first transfer pump 344, and a bottom air inlet of the first transfer pump 344 is in communication with the first fluidization pipe 333.

When the multi-pipe dedusting ash conveying pipeline works, the first Roots blower 35 presses wind into the first air inlet pipeline 331, and the wind in the first air inlet pipeline 331 is divided into two paths at the wind outlet end of the first air inlet pipeline 331: one path enters the first ash conveying pipeline 332, the other path enters the first fluidization pipeline 333, and wind in the first ash conveying pipeline 332 enters the first conveying pump 344 through a side air inlet of the first conveying pump 344; the ash in the first ash discharging device 34 is firstly stored in the first ash discharging hopper 341, and after the first switch valve 343 is opened, the ash in the first ash discharging hopper 341 is discharged into the first conveying pump 344 through the first ash discharging pipe 342; the ash entering the first conveying pump 344 is discharged from the first ash discharging device 34 and enters the first ash conveying pipeline 332 through the side air outlet of the first conveying pump 344 under the blowing action of the air entering from the side air inlet of the first conveying pump 344 and the traction action of the induced air unit 32, the air and the ash in the first ash conveying pipeline 332 enter the second first ash discharging device 34, the third first ash discharging device 34 and … … in turn along the conveying direction of the ash, and the air and the ash in the first ash conveying pipeline 332 enter the first exhaust pipeline 334 after being discharged from the last first ash discharging device 34 and finally enter the ash warehouse 31 through the first exhaust pipeline 334; the wind in the first fluidization pipe 333 enters each first transfer pump 344 from the bottom air inlet of each first transfer pump 344, blows off the hardened soot in the corresponding first ash discharging device 34 under the action of the first fluidization plate 345, mixes the soot in the first ash discharging device 34 with the wind in the first ash feeding pipe 332, and then enters the first ash feeding pipe 332 from the side air outlet of the first transfer pump 344.

When the multi-pipe dedusting ash conveying pipeline works, the air blown into the first Roots blower 35 is divided into two paths, one path of air enters each first ash conveying device 34 through the side air inlet of the first ash conveying device 34 so as to blow the ash corresponding to the ash discharged from the first ash conveying device 34 forwards along the ash conveying direction, the other path of air enters each first ash conveying device 34 through the bottom air inlet of the first ash conveying device 34 so as to blow the ash corresponding to the hardening in the first ash conveying device 34, and the ash discharged from the first ash conveying device 34 is blown forwards, so that the hardening of the ash in the first ash conveying device 34 is effectively prevented, the ash conveying efficiency is further improved, the ash conveying pipeline of the multi-pipe deduster is effectively prevented from being unsmooth, the front-back pressure difference of each ash conveying loop is reduced, the ash conveying efficiency is improved, the whole generator set is enabled to stably and reliably run, the current amount of the air guiding unit at the conveying outlet is effectively reduced, the working load of the air guiding unit is reduced, the service life of the air guiding unit is prolonged, and the cost required for conveying ash is reduced.

Preferably, as shown in fig. 4, the first ash discharging device 34 further includes a first variable frequency control valve 346 for adjusting the ash discharging speed, the first variable frequency control valve 346 is connected in the pipeline of the first ash discharging pipe 342 and is located at the downstream of the first switch valve 343, and by setting the first variable frequency control valve 346, the ash discharging speed and the ash discharging amount of the first ash discharging hopper 341 can be flexibly adjusted according to the actual situation, so as to effectively prevent the ash feeding pipeline from being blocked. The multi-pipe dedusting ash conveying pipeline also comprises a first check valve 36 for preventing ash from flowing reversely, a first pressure transmitter 37 for adjusting ash conveying pressure, and a second switch valve 39 for controlling the on-off of the first air inlet pipeline 331. The first check valve 36 and the first pressure transmitter 37 are respectively connected to the first ash feed pipe 332, and the first check valve 36 is located downstream of the first pressure transmitter 37, so that components entering the first ash feed pipe 332 and the first fluidization pipe 333 and the magnitude of wind pressure in the first ash feed pipe 332 can be flexibly adjusted and distributed according to actual ash feed conditions by arranging the first pressure transmitter 37. The second switching valve 39 is connected to the first air intake pipe 331.

Alternatively, as shown in fig. 4, the bag-type dust removing ash conveying pipeline includes a second ash conveying pipe group 41 for conveying ash, a plurality of groups of second ash discharging devices 42 for discharging coarse ash in the bag-type dust removing system, and a second roots blower 43 serving as a blowing device. In this alternative, the second Roots blower 43 is a Roots blower. The air inlet end of the second ash conveying pipe group 41 is connected with a second Roots blower 43, and the air outlet end of the second ash conveying pipe group 41 is communicated with the ash warehouse 31. The plurality of groups of second ash discharging devices 42 are sequentially arranged at intervals along the ash conveying direction, and each second ash discharging device 42 is respectively communicated with the second ash conveying pipe group 41.

In this alternative, as shown in fig. 4, the second ash conveying pipe group 41 includes a second air inlet pipe 411, a second ash conveying pipe 412 for blowing the ash discharged from the second ash discharging device 42 forward, a second fluidizing pipe 413 for fluidizing the ash hardened in the second ash discharging device 42, and a second air exhaust pipe 414. The air inlet end of the second air inlet pipeline 411 is connected with the second Roots blower 43, the air outlet end of the second air inlet pipeline 411 is respectively connected with the air inlet end of the second ash conveying pipeline 412 and the air inlet end of the second fluidization pipeline 413, the air outlet end of the second ash conveying pipeline 412 and the air outlet end of the second fluidization pipeline 413 are respectively connected with the air inlet end of the second air exhaust pipeline 414, and the air outlet end of the second air exhaust pipeline 414 is communicated with the ash warehouse 31. The side air inlet and the side air outlet of the second ash discharging device 42 are respectively communicated with the second ash feeding pipeline 412, and the bottom air inlet of the second ash discharging device 42 is communicated with the second fluidization pipeline 413.

In this alternative, as shown in fig. 4, the second ash discharging device 42 includes a second ash discharging hopper 421 and a third ash discharging hopper for holding ash, a second ash discharging pipe 422 and a third ash discharging pipe for discharging ash, a third switching valve 423 for controlling the on-off of the second ash discharging pipe 422, a fourth switching valve for controlling the on-off of the third ash discharging pipe, a second transfer pump 424 for pushing the discharged ash forward, and a second fluidization plate 425 for fluidizing the hardened ash. The feeding end of the second ash discharging pipe 422 is communicated with the second ash discharging hopper 421, the discharging end of the second ash discharging pipe 422 is communicated with the second conveying pump 424, and the feeding end of the third ash discharging pipe is communicated with the third ash discharging hopper, and the discharging end of the third ash discharging pipe is communicated with the second conveying pump 424. The second on-off valve 39 is connected in the line of the second lower ash pipe 422 and the third on-off valve 423 is connected in the line of the third lower ash pipe. The side air inlet and the side air outlet of the second transfer pump 424 are respectively communicated with the second ash feed pipe 412. The second fluidization plate 425 is disposed at the bottom of the second transfer pump 424, and the bottom air inlet of the second transfer pump 424 is communicated with the second fluidization pipeline 413. In this alternative, since the particle size of the soot in the bag-type dust removing system is much smaller than that of the soot in the multi-tube dust removing system, and the amount of the soot is much smaller, in the present invention, two sets of second ash discharging devices 42 can be combined into one set of second ash discharging devices 42 by sharing the second transfer pump 424 and the second fluidization plate 425, so that the overall structure is simple, and the manufacturing cost is low.

When the cloth bag dust removing and ash conveying pipeline works, the second Roots blower 43 presses air into the second air inlet pipeline 411, and the air in the second air inlet pipeline 411 is divided into two paths at the air outlet end of the second air inlet pipeline: one path enters the second ash conveying pipeline 412, the other path enters the second fluidization pipeline 413, and air in the second ash conveying pipeline 412 enters the second conveying pump 424 through a side air inlet of the second conveying pump 424; the ash in the second ash discharging device 42 is firstly stored in the second ash discharging hopper 421, and after the third switch valve 423 is opened, the ash in the second ash discharging hopper 421 is discharged into the second conveying pump 424 through the second ash discharging pipe 422; under the blowing action of the wind entering from the side air inlet of the second conveying pump 424 and the traction action of the induced air unit 32, the soot entering the second conveying pump 424 is discharged from the first second ash discharging device 42 through the side air outlet of the second conveying pump 424 and enters the communicated second ash conveying pipeline 412, the wind and the soot in the second ash conveying pipeline 412 sequentially enter and exit the second ash discharging device 42, the third second ash discharging device 42 and the third second ash discharging device … … along the conveying direction of the soot, and the wind and the soot in the second ash conveying pipeline 412 enter the communicated second exhaust pipeline 414 after being discharged from the last second ash discharging device 42, and finally enter the ash warehouse 31 through the second exhaust pipeline 414; the wind in the second fluidization pipeline 413 enters each second conveying pump 424 from the bottom air inlet of each second conveying pump 424, blows off the hardened soot in the corresponding second ash discharging device 42 under the action of the second fluidization disc 425, mixes the soot in the second ash discharging device 42 and the wind in the second ash conveying pipeline 412, and then enters the second ash conveying pipeline 412 from the side air outlet of the second conveying pump 424.

When the bag-type dust removing and conveying pipeline works, the air blown into the second Roots blower 43 is divided into two paths, one path enters each second dust removing device 42 through the side air inlet of the second dust removing device 42 so as to blow the ash discharged from the corresponding second dust removing device 42 forwards along the ash conveying direction, the other path of air enters each second dust removing device 42 through the bottom air inlet of the second dust removing device 42 so as to blow the ash hardened in the corresponding second dust removing device 42, and therefore the ash discharged from the second dust removing device 42 is blown forwards, the hardening of the ash in the second dust removing device 42 can be effectively prevented, the ash conveying efficiency can be further improved, the unsmooth conveying of the ash conveying pipeline of the bag-type dust remover can be effectively prevented, the front-rear pressure difference of each ash conveying loop is reduced, the ash conveying efficiency is improved, the whole generator set can stably and reliably run, the current quantity of the air inducing set at the conveying outlet can be effectively reduced, the working load of the air inducing set is reduced, the service life of the generator set is prolonged, and the required ash conveying cost is reduced.

Preferably, as shown in fig. 4, the second ash discharging device 42 further includes a second variable frequency adjusting valve 426 and a third variable frequency adjusting valve for adjusting the ash discharging speed, the second variable frequency adjusting valve 426 is connected in the pipeline of the second ash discharging pipe 422 and is located at the downstream of the second switch valve 39, the third variable frequency adjusting valve is connected in the pipeline of the third ash discharging pipe and is located at the downstream of the third switch valve 423, and by setting the second variable frequency adjusting valve 426 and the third variable frequency adjusting valve, the ash discharging speed and the ash discharging amount of the corresponding second ash discharging hopper 421 can be flexibly adjusted according to the actual situation, so that the ash feeding pipeline is effectively prevented from being blocked. The bag-type dust removing and ash conveying pipeline also comprises a second check valve 44 for preventing ash from flowing reversely, a second pressure transmitter 45 for adjusting ash conveying pressure and a fifth switch valve 46 for controlling the on-off of the second air inlet pipeline 411. The second check valve 44 and the second pressure transmitter 45 are respectively connected to the second ash feeding pipe 412, and the second check valve 44 is located downstream of the second pressure transmitter 45, so that components entering the second ash feeding pipe 412 and the second fluidization pipe 413 can be flexibly adjusted and distributed according to actual ash feeding conditions and the magnitude of wind pressure in the second ash feeding pipe 412 can be adjusted by arranging the second pressure transmitter 45. The fifth on-off valve 46 is connected to the second air intake duct 411.

Alternatively, as shown in fig. 4, the number of the bag-type dust removing and conveying pipelines is multiple, the multiple groups of the bag-type dust removing and conveying pipelines are arranged in parallel, and the number of the bag-type dust removing and conveying pipelines can be flexibly set according to actual dust conveying conditions. The ash conveying system further comprises a communication pipeline 47 for communicating the air inlet end of the multi-pipe dust removing and ash conveying pipeline with the air inlet end of the cloth bag dust removing and ash conveying pipeline and the air inlet end of the cloth bag dust removing and ash conveying pipeline, and a sixth switch valve 48 arranged in the communication pipeline 47 and used for controlling the on-off of the cloth bag dust removing and ash conveying pipeline. In actual design, as shown in fig. 4, the first Roots blower 35, the second Roots blower 43, and the third Roots blower 40 may be separately controlled by a PLC to perform a single separate start operation timing conveyance.

Optionally, as shown in fig. 4, the ash conveying system of the present invention further includes an electric vibrator 30 for vibrating the ash bin 31, wherein the electric vibrator 30 is connected to the ash bin 31 for compacting the ash in the ash bin 31 and for discharging the ash in the ash bin 31 as soon as possible and thoroughly when discharging the ash; further, a manual gate valve 49 is additionally arranged at the discharge hole of the ash bin 31 for controlling the opening and closing of the discharge hole. Similarly, the outer side walls of the first ash hopper 341, the second ash hopper 421 and the third ash hopper are also connected with electric vibrators for compacting the ash in the correspondingly arranged first ash hopper 341, the second ash hopper 421 and the third ash hopper and discharging the ash as soon as possible and thoroughly when discharging the ash.

Optionally, as shown in fig. 4, a path of compressed air purging pipe 38 is additionally arranged in the first ash hopper 341, the second ash hopper 421, the third ash hopper and the ash warehouse 31, and the PLC-electromagnetic valve is adopted to control purging, so that the fluidity of ash is increased, and the ash is not easy to block.

The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (8)

1. A flue stack system, comprising:

the device comprises an economizer flue (61) and an air preheater flue (62) which are vertically arranged and communicated with each other at the bottom end, so that flue gas discharged from the tail end of a boiler enters the economizer flue (61) downwards from the top end of the economizer flue (61), enters the bottom end of the air preheater flue (62) from the bottom end of the economizer flue (61), and then enters an inertial separator or a cloth bag dust removal system upwards from the top end of the air preheater flue (62);

the economizer flue (61) is internally provided with an economizer (63) at intervals along the vertical direction of the economizer flue, and the air preheater (57) is internally provided with an air preheater (62) at intervals along the vertical direction of the air preheater flue;

A coal-saving short-circuit flue (65) is further communicated between the coal-saving flue (61) and the air preheater flue (62), so that flue gas in the coal-saving flue (61) directly enters the air preheater flue (62), and a flue gas quantity adjusting device (66) for controlling the on-off state and the flow area of the flue gas is arranged in the coal-saving short-circuit flue (65) so as to be used for adjusting the flue gas quantity of the flue gas directly entering the air preheater flue (62) from the coal-saving flue (61), and further, the outlet temperature of the air preheater (57) arranged at the downstream of the short-circuit point of the coal-saving short-circuit flue (65) and the air preheater flue (62) is higher than the temperature of an acid condensation point;

the flue smoke exhaust system further comprises an inertial separator (51) for carrying out inertial separation on smoke and a cloth bag dust removal system for carrying out cloth bag dust removal on the smoke, wherein an air inlet of the inertial separator (51) is communicated with an air inlet flue (52), an air inlet of the air inlet flue (52) is communicated with an exhaust end of the air preheater flue (62), an exhaust port of the inertial separator (51) is communicated with an exhaust flue (53), and an exhaust port of the exhaust flue (53) is communicated with the cloth bag dust removal system; the flue gas exhaust system further comprises a flue gas treatment system, the flue gas treatment system comprises a short-circuit bypass flue (54) used for communicating the gas inlet flue (52) and the gas exhaust flue (53), two ends of the short-circuit bypass flue (54) are respectively connected with the gas inlet flue (52) and the gas exhaust flue (53), and a first opening adjusting device (55) used for controlling the flow area of the short-circuit bypass flue (54) is arranged in the short-circuit bypass flue; a second opening adjusting device (56) for controlling the flow area of the exhaust flue (53) is arranged in the exhaust flue (53), and the second opening adjusting device (56) is positioned at the upstream of the communication position of the short-circuit bypass flue (54) and the exhaust flue (53);

The flue smoke discharging system of the invention also comprises an ash conveying system, and the ash conveying system comprises: an ash bin (31) for containing the output ash, wherein the ash bin (31) is communicated with a blower unit (32) for pulling the ash forward into the ash bin (31); the ash warehouse (31) is also communicated with a multi-pipe dust removal ash conveying pipeline and a cloth bag dust removal ash conveying pipeline, the multi-pipe dust removal ash conveying pipeline is used for conveying the coarse ash separated from the flue and entering the multi-pipe dust removal system to the ash warehouse (31), and the cloth bag dust removal ash conveying pipeline is used for conveying the coarse ash separated from the cloth bag dust removal system to the ash warehouse (31); the multi-pipe dust-removing ash conveying pipeline and the cloth bag dust-removing ash conveying pipeline are connected in parallel, and are respectively provided with a blowing device for blowing ash to move towards an ash warehouse (31);

the multi-pipe dedusting ash conveying pipeline comprises a first ash conveying pipe group (33) for conveying ash, a plurality of groups of first ash discharging devices (34) for discharging coarse ash in the multi-pipe dedusting system, and a first Roots blower (35) serving as a blowing device; the first Roots blower (35) is a Roots blower; the air inlet end of the first ash conveying pipe group (33) is connected with a first Roots blower (35), and the air outlet end of the first ash conveying pipe group (33) is communicated with an ash warehouse (31); the first ash discharging devices (34) are sequentially arranged at intervals along the ash conveying direction, and each first ash discharging device (34) is respectively communicated with the first ash conveying pipe group (33);

The bag-type dust removing and ash conveying pipeline comprises a second ash conveying pipe group (41) for conveying ash, a plurality of groups of second ash discharging devices (42) for discharging coarse ash in the bag-type dust removing system, and a second Roots blower (43) serving as a blowing device; the second Roots blower (43) is a Roots blower; the air inlet end of the second ash conveying pipe group (41) is connected with a second Roots blower (43), and the air outlet end of the second ash conveying pipe group (41) is communicated with the ash warehouse (31); the second ash discharging devices (42) are sequentially arranged at intervals along the ash conveying direction, and each second ash discharging device (42) is respectively communicated with the second ash conveying pipe group (41).

2. The flue gas extraction system of claim 1, wherein,

the coal-saving short-circuit flue (65) is a hollow pipe with two ends communicated, the air inlet end of the coal-saving short-circuit flue (65) is communicated with the side wall surface of the economizer flue (61), and the air outlet end of the coal-saving short-circuit flue (65) is communicated with the side wall surface of the air preheater flue (62); the smoke quantity adjusting device (66) is arranged in a pipeline of the coal-saving short-circuit flue (65);

a plurality of flue gas flow channels (651) which are sequentially arranged along the width direction of the flue gas flow channels are arranged in the inner channel of the coal-saving short-circuit flue (65), the air inlet end of each flue gas flow channel (651) is communicated with the side wall surface of the coal economizer flue (61), and the air outlet end of each flue gas flow channel (651) is communicated with the side wall surface of the air preheater flue (62); a group of smoke quantity adjusting devices (66) are arranged in each smoke flow channel (651).

3. The flue gas extraction system of claim 2, wherein,

the smoke quantity adjusting device (66) comprises a driving shaft, an adjusting plate for adjusting the flow area of the coal-saving short-circuit flue (65), and a driving hand wheel or a driving source for driving the driving shaft to rotate;

the driving shaft is perpendicular to the outer wall surface of the coal-saving short-circuit flue (65) and penetrates through an inner channel of the coal-saving short-circuit flue (65) in a rotating mode, or penetrates through the flue gas flow channel (651) which is correspondingly arranged in a rotating mode;

the adjusting plate is arranged on the outer circle of the driving shaft and is positioned in an inner channel of the coal-saving short-circuit flue (65) or the flue gas flow channel (651) correspondingly arranged;

the driving hand wheel or the driving source is connected with the extending end of the driving shaft extending outwards and the coal-saving short-circuit flue (65).

4. The flue gas extraction system of claim 2, wherein,

the smoke quantity adjusting device (66) comprises an installing support connected to the outer wall of the coal-saving short-circuit flue (65), an adjusting plate for adjusting the flow area of the coal-saving short-circuit flue (65) and a driving source for driving the adjusting plate to linearly slide;

The outer wall surface of the coal-saving short-circuit flue (65) is provided with a mounting groove communicated with an inner channel or the flue gas flow channel (651) correspondingly arranged;

the adjusting plate is arranged in the corresponding mounting groove in a drawable sealing manner and extends to an inner channel of the coal-saving short-circuit flue (65) or the flue gas flow channel (651);

the driving source is arranged on the mounting support and is connected with the overhanging end of the adjusting plate, which extends outwards, of the coal-saving short-circuit flue (65).

5. The flue gas extraction system of claim 2, wherein,

a plurality of partition boards (67) which are sequentially arranged at intervals along the width direction of the inner channel of the coal-saving short-circuit flue (65) are arranged in the inner channel;

the flue gas flow channels (651) are respectively formed between the inner wall surface of the coal-saving short-circuit flue (65) and the adjacent partition plates (67) and between the adjacent partition plates (67).

6. The flue gas extraction system of claim 1, wherein,

the coal-saving short-circuit flue (65) is horizontally arranged;

the air inlet end of the coal-saving short-circuit flue (65) is communicated with the side wall surface of the economizer flue (61) between two adjacent groups of the economizers (63), and the air outlet end of the coal-saving short-circuit flue (65) is communicated with the side wall surface of the air preheater flue (62) between two adjacent groups of the air preheaters (57).

7. The flue gas extraction system of claim 1, wherein,

the coal-saving short flue (65) is coated with an insulating layer or an insulating coating.

8. The flue gas extraction system of claim 1, wherein,

the first opening adjusting device (55) comprises a first installation rotating shaft, a first adjusting piece for adjusting the opening of the short-circuit bypass flue (54), and a first driving wheel or a first driver for driving the first installation rotating shaft to rotate;

the first installation rotating shaft is perpendicular to the outer wall surface of the short-circuit bypass flue (54) and penetrates through the short-circuit bypass flue (54) in a rotating mode;

the first adjusting piece is arranged on the outer circle of the first installation rotating shaft and is positioned in the short-circuit bypass flue (54);

the first driving wheel or the first driver is connected with the overhanging end of the short circuit bypass flue (54) which extends outwards from the first installation rotating shaft.