CN112413623A - Flue smoke discharging system - Google Patents

Abstract

The invention discloses a flue smoke discharging system, which comprises: the economizer flue and the air preheater flue are vertically arranged, and the bottom ends of the economizer flue and the air preheater flue are communicated, so that smoke discharged from the tail end of the boiler enters the economizer flue from the top end of the economizer flue downwards, 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 from the top end of the air preheater flue upwards. The economizer is sequentially arranged in the economizer flue at intervals along the vertical direction of the economizer flue, and the air preheaters are sequentially arranged in the air preheater flue at intervals along the vertical direction of the air preheater flue. The economizer short-circuit flue is communicated with the air preheater flue, and a smoke volume adjusting device used for controlling the on-off and the flow area of the economizer short-circuit flue is arranged in the economizer short-circuit flue and used for adjusting the smoke volume directly entering the air preheater flue from the economizer flue, so that the outlet temperature of an air preheater arranged at the downstream of the short-circuit point of the economizer short-circuit flue and the air preheater flue is higher than the temperature of the condensation point of acid condensation.

Description

Flue smoke discharging system

Technical Field

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

Background

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

When the flue gas flows through the air preheater, due to the reduction of the 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 the soot in the flue gas to form acid condensation (the condensation point temperature of the acid condensation is generally 130-140 ℃) plate-shaped substances, carbon monoxide and the like are easy to form sodium hydroxide with the water vapor, the sodium hydroxide is mixed with the soot in the flue gas to form water condensation (the condensation point temperature of the water condensation is generally 80-90 ℃) plate-shaped substances, and the plate-shaped substances are hardened on the channel wall surface and the outer wall surface of the air preheater, so that the air preheater is blocked, the flow resistance of the flue gas is increased, the load and the current of a draught fan unit at a flue gas discharge outlet are increased, and the generated.

Disclosure of Invention

The invention provides a flue smoke exhaust system, which aims to solve the technical problem that an air preheater in the existing flue is easy to block due to condensation plate concretions.

The technical scheme adopted by the invention is as follows:

a flue gas venting system comprising: the economizer flue and the air preheater flue are vertically arranged, and the bottom ends of the economizer flue and the air preheater flue are communicated, so that smoke discharged from the tail end of the boiler enters the economizer flue from the top end of the economizer flue downwards, 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 from the top end of the air preheater flue upwards; the coal economizer is sequentially arranged in the coal economizer flue at intervals along the vertical direction of the coal economizer flue, and the air preheater is sequentially arranged in the air preheater flue at intervals along the vertical direction of the air preheater flue; the economizer short-circuit flue is communicated with the air preheater flue so that flue gas in the economizer flue directly enters the air preheater flue, and a flue gas quantity adjusting device used for controlling the on-off and flow area of the flue gas quantity adjusting device is arranged in the economizer short-circuit flue and used for adjusting the flue gas quantity directly entering the air preheater flue from the economizer flue, so that the outlet temperature of an air preheater arranged at the downstream of the short-circuit point of the economizer short-circuit flue and the air preheater flue is higher than the temperature of an acid condensation point.

Furthermore, the coal-saving short-circuit flue is a hollow pipe with two communicated ends, the air inlet end of the coal-saving short-circuit flue is communicated with the side wall surface of the coal 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.

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

Furthermore, the smoke quantity adjusting device comprises a driving rotating 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 rotating shaft to rotate; the rotating shaft is driven to be vertical to the outer wall surface of the coal-saving short-circuit flue to rotatably penetrate through an inner channel of the coal-saving short-circuit flue or a correspondingly arranged flue gas flow channel; 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 passage correspondingly arranged; and the driving hand wheel or the driving source is connected with the extending end of the coal-saving short-circuit flue with the extending shaft.

Furthermore, the smoke quantity adjusting device comprises an installation support connected to the outer wall of the coal-saving short-circuit flue, an adjusting plate used for adjusting the flow area of the coal-saving short-circuit flue, and a driving source used 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 correspondingly arranged flue gas flow channel; the adjusting plate is arranged in the correspondingly arranged mounting groove in a drawing and sealing manner and extends into an inner channel or a flue gas flow passage of the coal-saving short-circuit flue; the driving source is arranged on the mounting support and connected with the extending end of the adjusting plate extending out of the coal-saving short-circuit flue.

Furthermore, a plurality of partition plates which are sequentially arranged at intervals along the width direction of the inner channel of the coal-saving short-circuit flue are arranged in the inner channel of the coal-saving short-circuit flue; flue gas flow passages are respectively formed between the inner wall surface of the coal-saving short-circuit flue and the adjacent partition plates and between the two adjacent partition plates.

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 coal-saving device flue between two adjacent groups of coal-saving devices, 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-circuit flue is coated with a heat-insulating layer or a heat-insulating coating.

Furthermore, the flue smoke exhaust system also comprises an inertial separator for performing inertial separation on the flue gas and a cloth bag dust removal system for performing cloth bag dust removal on the flue gas, wherein the air inlet of the inertial separator is communicated with an air inlet flue, the air inlet of the air inlet flue is communicated with the exhaust end of the air preheater flue, the exhaust port of the inertial separator is communicated with an exhaust flue, and the exhaust port of the exhaust flue is communicated with the cloth bag dust removal system; the flue gas treatment system also comprises a short-circuit bypass flue used for communicating the air inlet flue and the exhaust flue, wherein 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; and a second opening adjusting device for controlling the flow area of the exhaust flue is arranged in the exhaust flue, 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.

Furthermore, the first opening adjusting device comprises a first installation rotating shaft, a first adjusting sheet 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 rotatably penetrates through the short-circuit bypass flue; the first adjusting sheet is arranged on the outer circle of the first mounting rotating shaft and is positioned in the short-circuit bypass flue; and the first driving wheel or the first driver is connected with the extending end of the extending short circuit bypass flue of the first mounting rotating shaft.

The invention has the following beneficial effects:

when the flue smoke exhaust system works, under the normal condition of smoke generated by combustion of biomass fuel in a stove, the smoke is exhausted into a flue of an economizer from the top end of the flue of the economizer through the tail end of the boiler, the smoke in the flue of the economizer sequentially passes through the economizers from top to bottom and then enters the bottom end of the flue of an air preheater from the bottom end of the flue of the economizer, and the smoke in the flue of the air preheater sequentially passes through the air preheaters from bottom to top and then is finally exhausted into an inertial separator and/or a cloth bag dust removal system from the top end of the flue of the air preheater; however, when the smoke volume adjusting device opens the coal-saving short-circuit flue, part of smoke in the coal-saving flue directly enters the air preheater flue through the coal-saving short-circuit flue and then continuously moves upwards along the air preheater flue, and as the short-circuit part of smoke 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 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 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 can be ensured to be higher than the condensation point temperature of the acid condensation, so that the formation of the acid condensation and the water condensation is effectively prevented, the problem of blockage of the air preheater is effectively relieved, the smoke circulation resistance is reduced, and the load and the current at the smoke discharge draught fan set are reduced, the generated energy of the generator set is improved; on the other hand, the smoke volume adjusting device can flexibly adjust the flow volume of the coal-saving short-circuit flue, and is flexible in adjustment and stronger in adaptability.

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

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention. In the drawings:

FIG. 1 is a schematic view of a portion of the structure of a flue gas extraction system in accordance with 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 diagram of a portion of the structure of a flue gas extraction system in accordance with a preferred embodiment of the present invention;

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

Description of the figures

30. An electric vibrator; 31. a dust storehouse; 32. a fan guide unit; 33. a first ash conveying pipe group; 331. a first air intake duct; 332. a first ash conveying pipeline; 333. a first fluidization conduit; 334. a first exhaust duct; 34. a first ash discharge device; 341. a first lower ash bucket; 342. a first ash discharging pipe; 343. a first on-off valve; 344. a first delivery pump; 345. a first fluidization tray; 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 on-off valve; 40. a third roots blower; 41. a second ash conveying pipe group; 411. a second air intake duct; 412. a second ash conveying pipeline; 413. a second fluidization conduit; 414. a second exhaust duct; 42. a second ash discharge device; 421. a second ash discharging hopper; 422. a second ash discharge pipe; 423. a third on-off valve; 424. a second delivery pump; 425. a second fluidization tray; 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 on-off valve; 47. a communicating pipeline; 48. a sixth switching valve; 49. a manual gate valve; 51. an inertial separator; 52. an air intake flue; 53. an exhaust flue; 54. short-circuit the bypass flue; 55. a first opening degree adjusting device; 56. a second opening degree adjusting device; 57. an air preheater; 61. a economizer flue; 62. an air preheater flue; 63. a coal economizer; 65. the coal is saved and the flue is short-circuited; 651. a flue gas channel; 66. a smoke amount adjusting device; 67. a separator.

Detailed Description

The embodiments of the invention will be described in detail below with reference to the accompanying drawings, but the invention can be embodied in many different forms, which are defined and covered by the following description.

Referring to fig. 1, a preferred embodiment of the present invention provides a flue gas exhausting system including: the economizer flue 61 and the air preheater flue 62 are vertically arranged, and the bottom ends of the economizer flue 61 and the air preheater flue 62 are communicated, so that flue gas discharged from the tail end of the boiler enters the economizer flue 61 from the top end of the economizer flue 61 downwards, enters the bottom end of 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 from the top end of the air preheater flue 62 upwards. The economizer flue 61 is sequentially provided with the economizers 63 at intervals along the vertical direction, and the air preheater flue 62 is sequentially provided with the air preheaters 57 at intervals along the vertical direction. An economizer short-circuit flue 65 is communicated between the economizer flue 61 and the air preheater flue 62, so that flue gas in the economizer flue 61 directly enters the air preheater flue 62, a flue gas amount adjusting device 66 for controlling the on-off and flow area of the economizer short-circuit flue 65 is arranged in the economizer short-circuit flue 65, so as to adjust the flue gas amount directly entering the air preheater flue 62 from the economizer flue 61, and further the outlet temperature of the air preheater 57 arranged at the downstream of the short-circuit point of the economizer short-circuit flue 65 and the air preheater flue 62 is greater than the temperature of the acid condensation point.

When the flue smoke exhaust system works, under the normal condition, smoke generated by combustion of biomass fuel in a stove is exhausted into the economizer flue 61 from the top end of the economizer flue 61 through the tail end of the boiler, the smoke in the economizer flue 61 sequentially passes through 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 smoke in the air preheater flue 62 sequentially passes through the air preheaters 57 from bottom to top, and finally is exhausted into the inertial separator and/or the dust removal system from the top end of the air preheater flue 62; however, when the smoke volume adjusting device 66 opens the coal economizer short-circuit flue 65, part of the smoke in the coal economizer flue 61 directly enters the air preheater flue 62 through the coal economizer short-circuit flue 65 and then continuously moves upwards along the air preheater flue 62, and as the short-circuit part of the smoke directly enters the air preheater flue 62 through the coal economizer short-circuit flue 65 instead of entering the air preheater flue 62 from the bottom end of the coal economizer flue 61, the temperature is high, and in the actual design process, only the short-circuit positions of the coal economizer short-circuit flue 65, the coal economizer flue 61 and the air preheater flue 62 are reasonably controlled, the outlet temperature of the air preheater 57 arranged at the downstream of the short-circuit point of the coal economizer short-circuit flue 65 and the air preheater flue 62 can be 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 blocking of the air preheater 57 is effectively relieved, and the smoke circulation resistance is reduced, the load and the current of the induced draft fan unit at the smoke discharge outlet are reduced, and the generating capacity of the generator set is improved; on the other hand, the smoke quantity adjusting device 66 can flexibly adjust the flow quantity of the coal-saving short-circuit flue 65, and is flexible in adjustment and stronger in adaptability.

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

Optionally, in the second embodiment of the coal-saving short-circuit flue 65, as shown in fig. 1 and fig. 2, a plurality of flue gas flow passages 651 sequentially arranged in the width direction of the inner passage of the coal-saving short-circuit flue 65 are arranged, an air inlet end of each flue gas flow passage 651 is communicated with a side wall surface of the coal-saving flue 61, and an air outlet end of each flue gas flow passage 651 is communicated with a side wall surface of the air preheater flue 62. A group of smoke volume adjusting devices 66 are arranged in each smoke gas flow passage 651, and the second embodiment is more suitable for a large-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 of the first embodiment of the smoke amount adjusting device 66 includes a driving shaft, an adjusting plate for adjusting the size of the flow area of the coal-saving short-circuit flue 65, and a driving handwheel or a driving source for driving the driving shaft to rotate. The rotating shaft is driven to vertically penetrate through the inner channel of the coal-saving short-circuit flue 65 through the rotation of the outer wall surface of the coal-saving short-circuit flue 65, and when the inner channel of the coal-saving short-circuit flue 65 is formed by a flue gas flow channel 651, the rotating shaft is driven to vertically penetrate through the flue gas flow channel 651 in the corresponding position through the rotation of the outer wall surface of the coal-saving short-circuit flue 65. The adjusting plate is arranged on the outer circle of the driving rotating shaft and is positioned in 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 runner 651, the adjusting plate is positioned in the flue gas runner 651 correspondingly arranged. And a driving hand wheel or a driving source is connected with the extending end of the extending coal-saving short-circuit flue 65 of the driving shaft. In this embodiment, the driving handwheel is a manual wheel for manual control operation, the driving source includes a driving motor and a speed reducer connected with an output shaft of the driving motor, and an output end of the speed reducer is fixed with the driving shaft. During adjustment, 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 channel 651 of the coal-saving short-circuit flue 65, and according to the difference of the rotation angles of the adjusting plate, the opening degree of the inner channel or the flue gas channel 651 of the coal-saving short-circuit flue 65 is different. 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 runner 651, when the adjusting plate is perpendicular to the axial direction of the coal-saving short-circuit flue 65 or the flue gas runner 651, the corresponding coal-saving short-circuit flue 65 or the flue gas runner 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 runner 651, the opening degree of the corresponding coal-saving short-circuit flue 65 or the flue gas runner 651 is maximized.

Specifically, in the first and second embodiments, the smoke amount adjusting device 66 of the second embodiment includes a mounting 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 a correspondingly arranged flue gas flow channel 651. The adjusting plate is installed in the correspondingly arranged installation groove in a drawing and 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 runner 651, the adjusting plate extends into the flue gas runner 651. The driving source is arranged on the mounting support and is connected with the extending end of the adjusting plate extending coal-saving short-circuit flue 65. In the alternative, the driving source is a telescopic cylinder, and the driving end of the telescopic cylinder is connected with the adjusting plate. When the adjusting plate is completely inserted into the inner channel or the flue gas runner 651 of the coal-saving short-circuit flue 65, the corresponding coal-saving short-circuit flue 65 or the corresponding flue gas runner 651 is closed, and when the adjusting plate is extracted from the coal-saving short-circuit flue 65, the opening degree of the corresponding coal-saving short-circuit flue 65 or the flue gas runner 651 is maximum. Preferably, the cross sections of the coal-saving short-circuit flue 65 and the flue gas runner 651 are both square, and the shape of the adjusting plate is matched with the cross section shape of the coal-saving short-circuit flue 65 or the flue gas runner 651 correspondingly arranged.

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

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

Preferably, the coal-saving short-circuit flue 65 is externally 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-insulating layer or the heat-insulating coating is used for only insulating the coal-saving short-circuit flue 65 so as to reduce the reduction of the short-circuit smoke temperature of the coal-saving short-circuit flue 65 and avoid scalding when an operator mistakenly touches the coal-saving short-circuit flue 65.

Optionally, as shown in fig. 3, the flue gas discharging system further includes an inertial separator 51 for performing inertial separation on the flue gas, and a bag-type dust removing system for performing bag-type dust removal on the flue gas, 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 removing system. The flue gas treatment system further comprises a short-circuit bypass flue 54 which is 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 which is 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 located upstream of the position where the short bypass flue 54 communicates with the exhaust flue 53.

When the flue smoke exhaust system works, smoke exhausted 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 enters the inertia separator 51 from the exhaust end of the air inlet flue 52, and the other path enters the short-circuit bypass flue 54; when the first opening degree adjusting device 55 opens the short-circuit bypass flue 54 and the second opening degree adjusting device 56 closes the exhaust flue 53 between the inertial separator 51 and the short-circuit bypass flue 54, the flue gas in the air inlet flue 52 completely enters the bag-type dust removal system through the short-circuit bypass flue 54; when the first opening degree adjusting device 55 closes the short-circuit bypass flue 54 and the second opening degree adjusting device 56 opens the exhaust flue 53 between the inertial separator 51 and the short-circuit bypass flue 54, the 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 removal system; when the first opening degree adjusting device 55 opens the short-circuit bypass flue 54 and the second opening degree 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 removal system through the short-circuit bypass flue 54, and the other part of the flue gas enters the bag-type dust removal system after passing through the inertial separator 51 and the exhaust flue 53.

When the flue smoke exhaust system works, the direction, the shunt and the like of smoke 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 because the smoke in the air inlet flue 52 completely passes through the inertia separator 51 and then outwards moves is solved, the separation, the dust removal and the like of the smoke are flexibly and controllably realized, the technical problem that the ash conveying of the flue smoke exhaust system is unsmooth 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 stable and reliably operated, the current amount of an induced fan set at a conveying outlet can be effectively reduced, the working loads of the induced fan set, the inertia separator 51 and the like are reduced, the service life is prolonged, and the cost required by ash conveying is reduced; on the other hand, the first opening degree adjusting device 55 can flexibly adjust the flow rate of the short-circuit bypass flue 54, and the second opening degree adjusting device 56 can flexibly adjust the opening degree 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, in a first embodiment of the first opening degree adjusting device 55, as shown in fig. 3, the first opening degree adjusting device 55 includes a first installation rotating shaft, a first adjusting tab for adjusting the opening degree of the short 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 sheet is arranged on the outer circle of the first installation rotating shaft and is positioned in the short-circuit bypass flue 54. A first drive wheel or first actuator is connected to the overhanging end of the first mounting shaft overhanging short bypass chimney 54. In this alternative, first drive wheel is for supplying the manual wheel of manual control operation, and first driver includes driving motor, reaches the reduction gear that links to each other with driving motor's output shaft, and the output and the first installation pivot of reduction gear are fixed. 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 sheet is driven to rotate by 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 sheet, the opening degree of the inner channel of the short-circuit bypass flue 54 is different. Preferably, the shape of the first adjusting tab matches the cross-sectional shape of the short bypass flue 54, when the first adjusting tab is perpendicular to the axial direction of the short bypass flue 54, the short bypass flue 54 is closed, and when the first adjusting tab is parallel to the axial direction of the short bypass flue 54, the opening of the short bypass flue 54 reaches the maximum.

Optionally, in a second embodiment of the first opening degree adjusting device 55, as shown in fig. 3, the first opening degree adjusting device 55 includes a mounting support connected to an outer wall of the short bypass flue 54, a first adjusting tab for adjusting the opening degree of the short bypass flue 54, and a first driver for driving the first adjusting tab 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 sheet is installed in the first installation groove in a drawable sealing manner, and the connecting end of the first adjusting sheet extends out of the short bypass flue 54. The first driver is arranged on the mounting support and connected with the connecting end of the first adjusting sheet. In the alternative, the first driver is a telescopic cylinder, and the driving end of the telescopic cylinder is connected with the first adjusting sheet. During adjustment, the telescopic cylinder drives the first adjusting sheet to pull and slide in the first mounting groove, when the first adjusting sheet is completely inserted into an inner channel of the short-circuit bypass flue 54, the short-circuit bypass flue 54 is closed, and when the first adjusting sheet is pulled out of the short-circuit bypass flue 54, the opening degree of the short-circuit bypass flue 54 is maximum. Preferably, the short bypass flue 54 has a square cross-section, and the first adjustment tab has a shape matching the cross-sectional shape of the short bypass flue 54.

Alternatively, in the first embodiment of the second opening degree adjusting device 56, as shown in fig. 3, the second opening degree adjusting device 56 includes a second installation rotating shaft, a second adjusting sheet for adjusting the opening degree of the exhaust flue 53, and a second driving wheel or a second driver for driving the second installation rotating shaft to rotate. The second mounting shaft is rotatably inserted into the exhaust flue 53 perpendicular to the outer wall surface of the exhaust flue 53. The second adjusting sheet is arranged on the outer circle of the second mounting rotating shaft and is positioned in the exhaust flue 53. A second drive wheel or second actuator is connected to the overhanging end of the second mounting shaft overhanging exhaust stack 53. In this alternative, the second driving wheel is a manual wheel for manual control and operation, the second driver comprises a driving motor and a speed reducer connected with an output shaft of the driving motor, and an output end of the speed reducer is fixed with the second mounting rotating shaft. 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 sheet is driven to rotate by an angle in the inner channel of the exhaust flue 53, and according to the difference of the rotation angles of the second adjusting sheet, the opening degree of the inner channel of the exhaust flue 53 is different. Preferably, the shape of the second adjustment piece matches the cross-sectional shape of the exhaust flue 53, when the second adjustment piece is perpendicular to the axial direction of the exhaust flue 53, the exhaust flue 53 is closed, and when the second adjustment piece is parallel to the axial direction of the exhaust flue 53, the opening degree of the exhaust flue 53 reaches the maximum.

Alternatively, in a second embodiment of the second opening degree adjusting device 56, as shown in fig. 3, the second opening degree adjusting device 56 includes a mounting support connected to the outer wall of the exhaust flue 53, a second adjusting blade for adjusting the opening degree of the exhaust flue 53, and a second actuator for driving the second adjusting blade to slide linearly. The outer wall surface of the exhaust gas flue 53 is provided with a second mounting groove communicated with the inner channel thereof. The second adjusting sheet is installed in the second installation groove in a drawable sealing manner, and the connecting end of the second adjusting sheet extends out of the exhaust flue 53. The second driver is arranged on the mounting support and connected with the connecting end of the second adjusting sheet. In the alternative, the second driver is a telescopic cylinder, and the driving end of the telescopic cylinder is connected with the second adjusting sheet. During adjustment, the telescopic cylinder drives the second adjusting sheet to be drawn and slid in the second mounting groove, when the second adjusting sheet is completely inserted into the inner channel of the exhaust flue 53, the exhaust flue 53 is closed, and when the second adjusting sheet is drawn away from the exhaust flue 53, the opening degree of the exhaust flue 53 is maximum. Preferably, the cross section of the exhaust flue 53 is square, and the shape of the second regulating 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, the first opening degree adjusting device 55 and the second opening degree adjusting device are both pipeline control valves, and the pipeline control valves adopt regulating valve structures commonly used in the prior art for controlling the opening degree of the pipelines.

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 exhausted flue gas is recovered, the temperature of the flue gas is reduced, and then the subsequent separation and dust removal treatment is performed. The short-circuit bypass flue 54 is communicated with the air inlet flue 52 and is positioned at the downstream of the air preheater 57, so that the cooled flue gas after energy recovery enters the inertial separator 51 and the bag-type dust removal system.

Optionally, as shown in fig. 4, the flue gas discharging system of the present invention further includes an ash conveying system, and the ash conveying system includes: the ash storehouse 31 is used for containing the cigarette ash outputted, and the ash storehouse 31 is communicated with a fan guiding unit 32 for guiding the cigarette ash forwards to the ash storehouse 31. The ash storehouse 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 coarse ash separated from a flue and entering the multi-pipe dust removal system to the ash storehouse 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 storehouse 31. The multi-pipe dust removal ash conveying pipeline and the cloth bag dust removal ash conveying pipeline are arranged in parallel, and the multi-pipe dust removal ash conveying pipeline and the cloth bag dust removal ash conveying pipeline are respectively provided with a blowing device used for blowing the ash to move towards the ash storehouse 31.

When the biological generator set works, smoke generated after combustion of biomass fuel in a stove enters a flue, soot in the smoke is deposited in the flue under the action of the flue, and under the action of an inertial separator arranged in the flue, coarse soot enters a multi-pipe dust removal system, fine soot enters a cloth bag dust removal system, and under the separation action of the cloth bag dust removal system, the fine soot is directly discharged to the atmosphere through a chimney, and the coarse soot is retained in the cloth bag dust removal system; after the ash conveying system is started, the ash in the multi-pipe dust removal system enters the multi-pipe dust removal and conveying pipeline, and is blown and drawn into the ash storage 31 under the action of the blowing device of the multi-pipe dust removal and conveying pipeline and the induced draft fan group 32 communicated with the ash storage 31, so that ash discharging 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 drawn into the ash bin 31 under the action of a blowing device of the bag-type dust removing and conveying pipeline and an induced draft fan unit 32 communicated with the ash bin 31, so that ash discharging operation is realized; the ash in the ash storage 31 is finally transported out by the tank truck.

The ash conveying system of the invention is characterized in that the multi-pipe dust-removing ash conveying pipeline and the cloth bag dust-removing ash conveying pipeline are arranged in parallel, and the multi-pipe dust-removing ash conveying pipeline and the cloth bag dust-removing ash conveying pipeline are respectively provided with the blowing devices for blowing the ash to move towards the ash storehouse 31, so that the multi-pipe dust-removing ash conveying pipeline forms an independent ash conveying loop under the action of the blowing devices and the induced draft fan group 32 communicated with the ash storehouse 31, and the cloth bag dust-removing ash conveying pipeline also forms an independent ash conveying loop under the action of the blowing devices and the induced draft fan group 32 communicated with the ash storehouse 31, the two ash conveying loops do not interfere with each other when working, thereby solving the technical problem that the ash conveying pipelines of the cloth bag dust remover and the multi-pipe dust remover are easy to convey unsmooth, reducing the front-back pressure difference of each ash conveying loop, improving the ash conveying efficiency, leading the whole generator set to stably and reliably run, and effectively, the working load of the draught fan unit is reduced, the service life of the draught fan unit is prolonged, and the cost required by ash conveying is reduced.

Alternatively, as shown in fig. 4, the multi-tube dust removal ash conveying line includes a first ash conveying tube group 33 for conveying the ash, a plurality of groups of first ash discharging devices 34 for discharging the coarse ash in the multi-tube 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 the first roots blower 35, and the air outlet end of the first ash conveying pipe group 33 is communicated with the ash storehouse 31. The plurality of 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 forward the soot discharged from the first ash discharging device 34, a first fluidizing pipe 333 for fluidizing the soot hardened in the first ash discharging device 34, and a first 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 respectively connected with the air inlet end of the first ash feeding pipeline 332 and the air inlet end of the first fluidized pipeline 333, the air outlet end of the first ash feeding pipeline 332 and the air outlet end of the first fluidized pipeline 333 are respectively connected with the air inlet end of the first exhaust pipeline 334, and the air outlet end of the first exhaust pipeline 334 is communicated with the ash bin 31. The side air inlet and the side air outlet of the first ash discharging device 34 are respectively communicated with the first ash conveying pipeline 332, and the bottom air inlet of the first ash discharging device 34 is communicated with the first fluidizing pipeline 333.

In this alternative, as shown in fig. 4, the first ash discharging device 34 includes a first ash discharging hopper 341 for containing the ash, a first ash discharging pipe 342 for discharging the ash, a first on-off valve 343 for controlling 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 bottom ash pipe 342 is vertically arranged, a feeding end of the first bottom ash pipe 342 is communicated with the first bottom ash bucket 341, and a discharging end of the first bottom ash pipe 342 is communicated with the first conveying pump 344. The first switching valve 343 is connected to the pipe of the first downpipe 342. The side air inlet and the side air outlet of the first conveying pump 344 are respectively communicated with the first dust feeding pipeline 332. The first fluidization plate 345 is disposed at the bottom of the first transfer pump 344, and the bottom inlet of the first transfer pump 344 is communicated with the first fluidization conduit 333.

When the multi-pipe dust removal and ash conveying pipeline works, the first Roots blower 35 blows air into the first air inlet pipeline 331, and the air in the first air inlet pipeline 331 is divided into two paths at the air outlet end: one path enters a first ash conveying pipeline 332, the other path enters a first fluidizing pipeline 333, and air in the first ash conveying pipeline 332 enters a first conveying pump 344 from 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 on-off valve 343 is opened, the ash in the first ash discharging hopper 341 is discharged to the first conveying pump 344 through the first ash discharging pipe 342; 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 draft fan group 32, the soot entering the first conveying pump 344 is discharged from the side air outlet of the first conveying pump 344 out of the first soot discharging device 34 and enters the communicated first soot conveying pipeline 332, along the conveying direction of the soot, the air and the soot in the first soot conveying pipeline 332 sequentially enter the second first soot discharging device 34, the third first soot discharging device 34 and … …, the air and the soot in the first soot conveying pipeline 332 are discharged out of the last first soot discharging device 34, enter the communicated first air discharging pipeline 334, and finally enter the soot warehouse 31 through the first air discharging pipeline 334; the air in the first fluidization conduit 333 enters each first transport pump 344 through the bottom air inlet of each first transport pump 344, blows off the soot hardened in the corresponding first ash falling device 34 under the action of the first fluidization plate 345, mixes the soot in the first ash falling device 34 with the air in the first ash conveying conduit 332, and then enters the first ash conveying conduit 332 through the side air outlet of the first transport pump 344.

When the multi-pipe dust removal and ash conveying pipeline of the invention works, the wind blown by the first roots blower 35 is divided into two paths, one path enters each first ash falling device 34 from the side air inlet of the first ash falling device 34 to blow the ash falling out of the corresponding first ash falling device 34 forward along the ash conveying direction, and the other path enters each first ash falling device 34 from the bottom air inlet of the first ash falling device 34 to blow the ash hardened in the corresponding first ash falling device 34, so that the ash falling out of the first ash falling device 34 can be blown forward, the ash hardening in the first ash falling device 34 can be effectively prevented, the ash conveying efficiency can be improved, the unsmooth conveying of the ash conveying pipeline of the multi-pipe dust remover can be effectively prevented, the front-back pressure difference of each ash conveying loop can be reduced, the ash conveying efficiency can be improved, the whole generator set can stably and reliably run, and the current amount of the fan set led out from the conveying outlet can be effectively reduced, the working load of the draught fan unit is reduced, the service life of the draught fan unit is prolonged, and the cost required by ash conveying is reduced.

Preferably, as shown in fig. 4, the first ash discharging device 34 further comprises a first variable frequency regulating valve 346 for regulating the ash discharging speed, the first variable frequency regulating valve 346 is connected in the pipeline of the first ash discharging pipe 342 and is located downstream of the first switch valve 343, and by arranging the first variable frequency regulating valve 346, the ash discharging speed and the ash discharging amount of the first ash discharging hopper 341 can be flexibly regulated according to actual conditions, thereby effectively preventing the ash conveying pipeline from being blocked. The multi-pipe dedusting ash conveying pipe further includes a first check valve 36 for preventing the reverse flow of the soot, a first pressure transmitter 37 for adjusting the ash conveying pressure, and a second switching valve 39 for controlling the on/off of the first air inlet pipe 331. The first check valve 36 and the first pressure transmitter 37 are respectively connected to the first ash conveying pipeline 332, the first check valve 36 is located at the downstream of the first pressure transmitter 37, and by arranging the first pressure transmitter 37, the components entering the first ash conveying pipeline 332 and the first fluidizing pipeline 333 can be flexibly adjusted and distributed according to the actual ash conveying condition, and the air pressure in the first ash conveying pipeline 332 can be adjusted. The second switching valve 39 is connected in the first air intake pipe 331.

Alternatively, as shown in fig. 4, the bag house dust and ash conveying line includes a second ash conveying pipe group 41 for conveying the ash, a plurality of groups of second ash discharging devices 42 for discharging the coarse ash in the bag house dust 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 the second roots blower 43, and the air outlet end of the second ash conveying pipe group 41 is communicated with the ash storehouse 31. The plurality of sets 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 forward the soot discharged from the second ash discharging device 42, a second fluidizing pipe 413 for fluidizing the soot hardened in the second ash discharging device 42, and a second 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 feeding pipeline 412 and the air inlet end of the second fluidizing pipeline 413, the air outlet end of the second ash feeding pipeline 412 and the air outlet end of the second fluidizing pipeline 413 are respectively connected with the air inlet end of the second exhaust pipeline 414, and the air outlet end of the second exhaust pipeline 414 is communicated with the ash bin 31. The side air inlet and the side air outlet of the second ash discharging device 42 are respectively communicated with the second ash conveying pipeline 412, and the bottom air inlet of the second ash discharging device 42 is communicated with the second fluidizing 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 containing the ash, a second ash discharging pipe 422 and a third ash discharging pipe for discharging the ash, a third on-off valve 423 for controlling on-off of the second ash discharging pipe 422, a fourth on-off valve for controlling on-off of the third ash discharging pipe, a second transfer pump 424 for pushing the discharged ash forward, and a second fluidizing plate 425 for fluidizing the hardened ash. The feed end of the second lower ash pipe 422 is communicated with the second lower ash bucket 421, the discharge end of the second lower ash pipe 422 is communicated with the second conveying pump 424, the feed end of the third lower ash pipe is communicated with the third lower ash bucket, and the discharge end of the third lower ash pipe is communicated with the second conveying pump 424. The second switching valve 39 is connected in the line of the second ash discharge pipe 422, and the third switching valve 423 is connected in the line of the third ash discharge pipe. The side air inlet and the side air outlet of the second conveying pump 424 are respectively communicated with the second ash conveying pipeline 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 conduit 413. In this alternative, because 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 solution of the present invention, two sets of second soot discharging devices 42 can be combined into one set of second soot discharging devices 42 by sharing the second conveying pump 424 and the second fluidizing plate 425, so that the overall structure is simple and the manufacturing cost is low.

When the bag-type dust removal 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: one path enters a second ash feeding pipeline 412, the other path enters a second fluidizing pipeline 413, and air in the second ash feeding pipeline 412 enters a 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 on-off 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 draft fan group 32, the soot entering the second conveying pump 424 is discharged from the side air outlet of the second conveying pump 424 out of the first second ash discharging device 42 and enters the communicated second ash conveying pipeline 412, along the conveying direction of the soot, the wind and the soot in the second ash conveying pipeline 412 sequentially enter the second ash discharging device 42, the third second ash discharging device 42 and the third ash discharging device … …, and after the wind and the soot in the second ash conveying pipeline 412 are discharged out of the last second ash discharging device 42, the wind and the soot enter the communicated second air discharging pipeline 414 and finally enter the ash storage 31 through the second air discharging pipeline 414; the air in the second fluidization conduit 413 enters each second conveying pump 424 from the bottom air inlet of each second conveying pump 424, blows off the soot hardened in the corresponding second soot discharging device 42 under the action of the second fluidization plate 425, mixes the soot in the second soot discharging device 42 with the air in the second soot conveying conduit 412, and then enters the second soot conveying conduit 412 from the side air outlet of the second conveying pump 424.

When the cloth bag dust removing and ash conveying pipeline of the invention works, the air blown by the second roots blower 43 is divided into two paths, one path enters each second ash discharging device 42 from the side air inlet of the second ash discharging device 42 to blow the ash discharged from the corresponding second ash discharging device 42 forwards along the ash conveying direction, the other path enters each second ash discharging device 42 from the bottom air inlet of the second ash discharging device 42 to blow the ash hardened in the corresponding second ash discharging device 42, so that the ash discharged from the second ash discharging device 42 can be effectively prevented from being hardened in the second ash discharging device 42, the ash conveying efficiency can be improved, the ash conveying pipeline of the cloth bag dust remover can be effectively prevented from conveying unsmooth, the front-back pressure difference of each ash conveying loop can be reduced, the ash conveying efficiency can be improved, the whole generator set can stably and reliably run, and the current of the fan set introduced from the conveying outlet can be effectively reduced, the working load of the draught fan unit is reduced, the service life of the draught fan unit is prolonged, and the cost required by ash conveying is reduced.

Preferably, as shown in fig. 4, the second ash discharging device 42 further comprises a second variable frequency control valve 426 and a third variable frequency control valve for adjusting the ash discharging speed, the second variable frequency control valve 426 is connected in the pipeline of the second ash discharging pipe 422 and is located downstream of the second switch valve 39, the third variable frequency control valve is connected in the pipeline of the third ash discharging pipe and is located downstream of the third switch valve 423, and by arranging the second variable frequency control valve 426 and the third variable frequency control valve, the ash discharging speed and the ash discharging amount of the corresponding second ash discharging hopper 421 can be flexibly adjusted according to actual conditions, so that the blockage of the ash conveying pipeline is effectively prevented. The bag-type dust removal ash conveying pipeline further comprises a second check valve 44 for preventing the ash from flowing reversely, a second pressure transmitter 45 for adjusting the 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 conveying pipeline 412, the second check valve 44 is located at the downstream of the second pressure transmitter 45, and by arranging the second pressure transmitter 45, the components entering the second ash conveying pipeline 412 and the second fluidized pipeline 413 can be flexibly adjusted and distributed according to the actual ash conveying condition, and the air pressure in the second ash conveying pipeline 412 can be adjusted. The fifth switching valve 46 is connected in the second intake duct 411.

Optionally, as shown in fig. 4, the number of the bag-type dust removal and ash transport pipelines is multiple groups, multiple groups of bag-type dust removal and ash transport pipelines are arranged in parallel, and the number of the groups of bag-type dust removal and ash transport pipelines can be flexibly set according to the actual ash transport situation. Defeated grey system still includes the air inlet end that is used for the defeated grey pipeline of multitube dust removal and the air inlet end of defeated grey pipeline of sack dust removal, the intercommunication pipeline 47 of intercommunication between the air inlet end of defeated grey pipeline of sack dust removal, and set up the sixth ooff valve 48 that is used for controlling its break-make in intercommunication pipeline 47, through this kind of mode of setting, can be under the less condition of defeated grey volume, certain or certain several roots blower is opened, in order to be used for carrying out defeated grey to whole defeated grey system and transporting, also when certain roots blower need be maintained, the roots blower who opens the bypass intercommunication replaces, in order to avoid delaying the working progress, roots blower's use is nimble, and is convenient. 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 PLC to perform separate start operation and timing conveyance for each unit.

Optionally, as shown in fig. 4, the ash conveying system of the present invention further comprises 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 completely; further, a manual gate valve 49 is additionally arranged at the discharge port of the ash bin 31 to control the opening and closing of the discharge port. Similarly, the outer sidewalls of the first lower hopper 341, the second lower hopper 421 and the third lower hopper are connected with electric vibrators for compacting the soot in the first lower hopper 341, the second lower hopper 421 and the third lower hopper, which are correspondingly arranged, and for discharging the soot as soon as possible and thoroughly during the soot discharging.

Optionally, as shown in fig. 4, a compressed air purging pipe 38 is additionally arranged in the first lower ash bucket 341, the second lower ash bucket 421, the third lower ash bucket, and the ash storage 31, and the purging is controlled by a PLC-solenoid valve, so that the fluidity of the ash is increased, and the ash is not easily blocked.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A flue gas extraction 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 ends, so that flue gas discharged from the tail end of the boiler enters the economizer flue (61) from the top end of the economizer flue (61) downwards, 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 from the top end of the air preheater flue (62) upwards;

the economizer flue (61) is internally and sequentially provided with economizers (63) at intervals along the vertical direction, and the air preheater (57) is sequentially and alternately arranged in the air preheater flue (62) along the vertical direction;

the economizer flue (61) and the air preheater flue (62) are further communicated with an economizer short-circuit flue (65) to enable flue gas in the economizer flue (61) to directly enter the air preheater flue (62), a smoke quantity adjusting device (66) used for controlling the on-off and flow area size of the flue gas is arranged in the economizer short-circuit flue (65) and used for adjusting the smoke quantity of the economizer flue (61) directly entering the air preheater flue (62), and then the outlet temperature of the air preheater (57) arranged at the lower part of the economizer short-circuit flue (65) and the short-circuit point of the air preheater flue (62) is larger than the condensation point temperature of acid condensation.

2. The flue smoke evacuation system of claim 1,

the coal-saving short-circuit flue (65) is a hollow pipe with two communicated ends, the air inlet end of the coal-saving short-circuit flue (65) is communicated with the side wall surface of the coal 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).

3. The flue smoke evacuation system of claim 1,

a plurality of flue gas flow channels (651) which are sequentially arranged along the width direction of the inner channel of the coal economizer short-circuit flue (65) are arranged in the inner channel of the coal economizer short-circuit flue, 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);

and a group of smoke quantity adjusting devices (66) are arranged in each smoke gas channel (651).

4. Flue smoke evacuation system according to any of claims 2 or 3,

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

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

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 (65) or the flue gas flow passage (651) correspondingly arranged;

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

5. Flue smoke evacuation system according to any of claims 2 or 3,

the smoke quantity adjusting device (66) comprises an installation support connected to the outer wall of the coal-saving short-circuit flue (65), an adjusting plate used for adjusting the size of the flow area of the coal-saving short-circuit flue (65), and a driving source used 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 thereof or the flue gas flow channel (651) correspondingly arranged;

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

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

6. A flue smoke evacuation system as claimed in claim 3,

a plurality of partition plates (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 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 two adjacent partition plates (67).

7. The flue smoke evacuation system of claim 1,

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 the 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 the two adjacent groups of the air preheaters (57).

8. The flue smoke evacuation system of claim 1,

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

9. The flue smoke evacuation system of claim 1,

the flue smoke discharging system further comprises an inertial separator (51) for performing inertial separation on the flue gas and a cloth bag dust removing system for performing cloth bag dust removal on the flue gas, wherein an air inlet flue (52) is communicated with an air inlet of the inertial separator (51), 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 removing 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 size of the flow area of the short-circuit bypass flue (54) is arranged in the short-circuit bypass flue (54);

and 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).

10. The flue smoke evacuation system of claim 9,

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

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

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

the first driving wheel or the first driver is connected with the extending end of the first mounting rotating shaft, which extends out of the short-circuit bypass flue (54).

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