CN112588059B

CN112588059B - Flue gas treatment system

Info

Publication number: CN112588059B
Application number: CN202011336287.7A
Authority: CN
Inventors: 王热华; 贾星亮; 贾奥; 万为华; 王熙福; 黄军; 王熙毅
Original assignee: Anhua Huasheng Bioenergy Co ltd
Current assignee: Anhua Huasheng Bioenergy Co ltd
Priority date: 2020-11-25
Filing date: 2020-11-25
Publication date: 2022-06-24
Anticipated expiration: 2040-11-25
Also published as: CN112588059A

Abstract

The invention discloses a flue gas treatment system, comprising: 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 smoke exhaust end of the boiler, the air outlet of the inertial separator is communicated with an air outlet flue, and the air outlet of the air outlet flue is communicated with the cloth bag dust removal 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. 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. The flue gas treatment system can flexibly and controllably separate and remove dust and the like of flue gas, and solves the technical problem of unsmooth ash conveying of the flue gas treatment system pipeline.

Description

Flue gas treatment system

Technical Field

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

Background

In the bio-generator set, the stove is connected with a flue, flue gas generated after biomass fuel in the stove burns enters the flue, soot in the flue gas is deposited in the flue under the action of the flue, thicker soot enters the multi-tube dust remover and thinner soot enters the bag-type dust remover, the thinner soot is directly discharged to air through the flue under the separation action of the bag-type dust remover, the thicker soot is retained in the bag-type dust remover, and the soot retained in the bag-type dust remover and the soot in the multi-tube dust remover enter the ash storehouse under the conveying action of the ash conveying system.

In the prior art, a flue gas treatment system formed by connecting an inertial separator, a bag-type dust collector, a multi-pipe dust collector and the like is easy to convey unsmoothly, so that the differential pressure before and after conveying reaches 1800Pa, the current of an induced draft fan set at a conveying outlet is increased, the load of the induced draft fan set is serious, the service life is short, the power consumption is high, the ash conveying cost is high, the ash conveying efficiency is low, and the normal operation of the whole generator set is influenced.

Disclosure of Invention

The invention provides a flue gas treatment system, which aims to solve the technical problem that a pipeline of the existing flue gas treatment system is easy to convey ash and compensate.

The technical scheme adopted by the invention is as follows:

a flue gas treatment system comprising: the device comprises an inertial separator for performing inertial separation on flue gas and a bag-type dust removal system for performing bag-type dust removal on the flue gas, wherein a gas inlet of the inertial separator is communicated with a gas inlet flue, a gas inlet of the gas inlet flue is communicated with a smoke exhaust end of a boiler, a gas outlet of the inertial separator is communicated with a gas exhaust flue, and a gas outlet of the gas exhaust flue is communicated with the bag-type 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, 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.

Furthermore, the first opening adjusting device comprises an installation support connected to the outer wall of the short-circuit bypass flue, a first adjusting sheet used for adjusting the opening of the short-circuit bypass flue, and a first driver used for driving the first adjusting sheet to slide linearly; the outer wall surface of the short bypass flue is provided with a first mounting groove communicated with the inner channel; the first adjusting sheet is arranged in the first mounting groove in a drawing and sealing mode, and the connecting end of the first adjusting sheet extends out of the short-circuit bypass flue; the first driver is arranged on the mounting support and connected with the connecting end of the first adjusting sheet.

Furthermore, the second opening adjusting device comprises a second mounting rotating shaft, a second adjusting sheet for adjusting the opening of the exhaust flue, and a second driving wheel or a second driver for driving the second mounting rotating shaft to rotate; the second mounting rotating shaft is perpendicular to the outer wall surface of the exhaust flue and rotatably penetrates through the exhaust flue; the second adjusting sheet is arranged on the outer circle of the second mounting rotating shaft and is positioned in the exhaust flue; and the second driving wheel or the second driver is connected with the extending end of the extending exhaust flue of the second mounting rotating shaft.

Furthermore, the second opening adjusting device comprises a mounting support connected to the outer wall of the exhaust flue, a second adjusting sheet for adjusting the opening of the exhaust flue, and a second driver for driving the second adjusting sheet to slide linearly; the outer wall surface of the exhaust flue is provided with a second mounting groove communicated with the inner channel of the exhaust flue; the second adjusting sheet is arranged in the second mounting groove in a drawing and sealing mode, and the connecting end of the second adjusting sheet extends out of the exhaust flue; the second driver is arranged on the mounting support and connected with the connecting end of the second adjusting sheet.

Further, the first opening degree adjusting device and the second opening degree adjusting device are both pipeline control valves.

Furthermore, an air preheater for energy exchange is arranged in an inner channel of the air inlet section of the air inlet flue; the communication position of the short-circuit bypass flue and the air inlet flue is positioned at the downstream of the air preheater.

Further, the flue gas treatment system still includes ash conveying system, and ash conveying system includes: the ash bin is used for containing the output cigarette ash and communicated with a fan group for pulling the cigarette ash forwards into the ash bin; the ash storehouse 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, 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; 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 cigarette ash to move towards the ash storehouse.

Further, the multi-pipe dust removal ash conveying pipeline comprises a first ash conveying pipe group for conveying the ash, a plurality of groups of first ash discharging devices for discharging the coarse ash in the multi-pipe dust removal system, and a first roots blower used as a blowing device; the air inlet end of the first ash conveying pipe group is connected with a first roots blower, and the air outlet end of the first ash conveying pipe group is communicated with an ash warehouse; the multiple groups of first ash discharging devices are sequentially arranged at intervals along the ash conveying direction, and each first ash discharging device is respectively communicated with the first ash conveying pipe group.

Further, the bag-type dust removal and conveying pipeline comprises a second dust conveying pipe group for conveying the soot, a plurality of groups of second soot discharging devices for discharging the coarse soot in the bag-type dust removal system, and a second roots blower used as a blowing device; the air inlet end of the second ash conveying pipe group is connected with a second roots blower, and the air outlet end of the second ash conveying pipe group is communicated with an ash warehouse; the multiple groups of second ash discharging devices are arranged at intervals in sequence along the ash conveying direction, and each second ash discharging device is respectively communicated with the second ash conveying pipe group.

The invention has the following beneficial effects:

when the flue gas treatment system works, the direction, the shunt flow and the like of the flue gas in the air inlet flue can be flexibly adjusted by arranging the short-circuit bypass flue, the first opening degree adjusting device and the second opening degree adjusting device, so that the technical problem that the pressure of a flue pipeline system is increased because all the flue gas in the air inlet flue passes through the inertia separator 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 flue gas treatment system pipeline is not smooth is solved, the front-back pressure difference of each ash conveying loop is reduced, the ash conveying efficiency is improved, the whole generator set stably and reliably runs, the current amount of the draught fan set at a conveying outlet can be effectively reduced, the working load of the draught fan set, the inertia separator and the like is reduced, the service life is prolonged, and the cost required by ash conveying is reduced; on the other hand, the size of short circuit bypass flue flow can be adjusted in a flexible way to first aperture adjusting device, and the aperture size of the exhaust flue between inertia separator and the short circuit bypass flue can be adjusted in a flexible way to second aperture adjusting device, adjusts more in a flexible way, and adaptability is stronger.

In addition to the above-described objects, features and advantages, the present invention has other objects, features and advantages. 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 treatment system in accordance with a preferred embodiment of the present invention;

FIG. 2 is a schematic structural diagram of an ash conveying system in the flue gas treatment system according to the 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 discharging 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.

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 treatment system comprising: the device comprises an inertial separator 51 for performing inertial separation on flue gas and a cloth bag dust removal system for performing cloth bag 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 a smoke exhaust end of a boiler, an air outlet of the inertial separator 51 is communicated with an air outlet flue 53, and an air outlet of the air outlet flue 53 is communicated with the cloth bag dust removal 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 gas duct 53 is provided with a second opening degree adjusting device 56 for controlling the size of the flow area thereof, and the second opening degree adjusting device 56 is located upstream of the position where the short bypass gas duct 54 communicates with the exhaust gas duct 53.

When the flue gas treatment system works, flue gas generated after biomass fuel in a stove burns enters the air inlet flue 52 through the smoke exhaust end of the boiler, the flue gas in the air inlet flue 52 is divided into two paths, one path of flue gas enters the inertia separator 51 from the exhaust end of the air inlet flue 52, and the other path of flue gas 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 adjusting device 55 closes 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, 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 gas treatment system works, the direction, the shunt 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 because all the flue gas in the air inlet flue 52 passes through the inertia separator 51 and then goes 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 the flue gas treatment system is unsmooth in pipeline conveying of the flue gas treatment system 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 reliable to run, the current amount of the draught fan set at a conveying outlet can be effectively reduced, the working load of the draught fan set, the inertia separator 51 and the like is 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. 1, 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. 1, 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. 1, 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. 1, 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 flue 53 is provided with a second mounting groove communicated with the inner passage 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 regulation 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. 1, an air preheater 57 for energy exchange is disposed in the inner channel of the air inlet section of the air inlet flue 52, and by disposing the air preheater 57, the energy of the exhausted flue gas is recovered, the temperature of the flue gas is reduced, and subsequent separation and dust removal processes are 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. 2, the flue gas treatment 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 reducing the current amount of the induced draft fan group at the conveying outlet, 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. 2, 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. 2, 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. 2, 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 line of the first ashing pipe 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 tray 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 fluidizing pipe 333 enters each first conveying pump 344 through the bottom air inlet of each first conveying pump 344, and after the soot hardened in the corresponding first ash dropping device 34 is blown away by the first fluidizing tray 345, the soot in the first ash dropping device 34 and the air in the first ash conveying pipe 332 are mixed, and then the air enters the first ash conveying pipe 332 through the side air outlet of the first conveying 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. 2, 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 intake 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. 2, 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. 2, 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. 2, 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 fifth switching valve 46 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 fluidizing pipe 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 fluidizing tray 425, mixes the soot in the second soot discharging device 42 with the air in the second soot conveying pipe 412, and then enters the second soot conveying pipe 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. 2, 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 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 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 as to effectively prevent the ash conveying pipeline from being blocked. 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. 2, the number of the bag-type dust removal and transmission pipelines is multiple, multiple groups of bag-type dust removal and transmission pipelines are arranged in parallel, and the number of the groups of the bag-type dust removal and transmission pipelines can be flexibly set according to the actual dust transmission condition. The ash conveying system also comprises an air inlet end used for connecting the air inlet end of the multi-pipe dust and ash conveying pipeline with the air inlet end of the bag dust and ash conveying pipeline, a communicating pipeline 47 communicated between the air inlet ends of the bag dust and ash conveying pipeline, and a sixth switch valve 48 arranged in the communicating pipeline 47 and used for controlling the on-off of the communicating pipeline, through the arrangement mode, a certain or a plurality of roots blowers can be opened under the condition of less ash conveying amount, so as to convey ash to the whole ash conveying system, and also when a certain roots blower needs to be maintained, the roots blower communicated by a bypass is opened to replace the roots blower, so as to avoid delaying the working schedule, and the roots blower is flexible and convenient to use. In actual design, as shown in FIG. 2, the first Roots blower 35, the second Roots blower 43, and the third Roots blower 40 may be separately controlled by a PLC, and the separate start-up operation and timing feed may be performed for each of the individual Roots blowers.

Optionally, as shown in fig. 2, the ash conveying system of the present invention further comprises an electric vibrator 30 for vibrating the ash storage 31, the electric vibrator 30 being connected to the ash storage 31 for compacting the ash in the ash storage 31 and for discharging the ash in the ash storage 31 as quickly and thoroughly as possible when the ash is discharged; 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. 2, 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

1. A flue gas treatment system, comprising:

the device comprises an inertial separator (51) for performing inertial separation on flue gas and a cloth bag dust removal system for performing cloth bag dust removal on the flue gas, wherein a gas inlet of the inertial separator (51) is communicated with a gas inlet flue (52), a gas inlet of the gas inlet flue (52) is communicated with a smoke exhaust end of a boiler, a gas outlet of the inertial separator (51) is communicated with a gas exhaust flue (53), and a gas outlet of the gas exhaust flue (53) is communicated with the cloth bag 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 air exhaust flue (53), two ends of the short-circuit bypass flue (54) are respectively connected with the air inlet flue (52) and the air 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);

a second opening adjusting device (56) used for controlling the size of 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 gas processing system still includes defeated grey system, and defeated grey system includes: the ash bin (31) is used for containing the output cigarette ash, and the ash bin (31) is communicated with a fan set (32) and used for pulling the cigarette ash forwards into the ash bin (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 the coarse ash separated from the 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 for blowing the ash to move towards the ash storehouse (31);

the multi-pipe dust removal and ash conveying pipeline comprises a first ash conveying pipe group (33) for conveying the 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; 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 multiple groups of first ash discharging devices (34) are arranged at intervals in sequence 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 removal ash conveying pipeline comprises 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-type dust removal 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 storehouse (31); the multiple groups of second ash discharging devices (42) are arranged at intervals in sequence 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 treatment system of claim 1,

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).

3. The flue gas treatment system of claim 1,

the first opening adjusting device (55) comprises a mounting support connected to the outer wall of the short-circuit bypass flue (54), a first adjusting sheet used for adjusting the opening of the short-circuit bypass flue (54), and a first driver used for driving the first adjusting sheet to slide linearly;

the outer wall surface of the short-circuit bypass flue (54) is provided with a first mounting groove communicated with the inner channel thereof;

the first adjusting sheet is arranged in the first mounting groove in a drawing and sealing mode, and the connecting end of the first adjusting sheet extends out of the short-circuit bypass flue (54);

the first driver is arranged on the mounting support and connected with the connecting end of the first adjusting sheet.

4. The flue gas treatment system of claim 1,

the second opening adjusting device (56) comprises a second mounting rotating shaft, a second adjusting sheet for adjusting the opening of the exhaust flue (53), and a second driving wheel or a second driver for driving the second mounting rotating shaft to rotate;

the second mounting rotating shaft is perpendicular to the outer wall surface of the exhaust flue (53) and rotatably penetrates through the exhaust flue (53);

the second adjusting sheet is arranged on the excircle of the second mounting rotating shaft and is positioned in the exhaust flue (53);

the second driving wheel or the second driver is connected with the extending end of the second mounting rotating shaft extending out of the exhaust flue (53).

5. The flue gas treatment system of claim 1,

the second opening adjusting device (56) comprises a mounting support connected to the outer wall of the exhaust flue (53), a second adjusting sheet for adjusting the opening of the exhaust flue (53), and a second driver for driving the second adjusting sheet to slide linearly;

the outer wall surface of the exhaust flue (53) is provided with a second mounting groove communicated with the inner channel thereof;

the second adjusting sheet is arranged in the second mounting groove in a drawing and sealing mode, 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.

6. The flue gas treatment system of claim 1,

the first opening degree adjusting device (55) and the second opening degree adjusting device are both pipeline control valves.

7. The flue gas treatment system of claim 1,

an air preheater (57) for energy exchange is arranged in an inner channel of the air inlet section of the air inlet flue (52);

the short bypass flue (54) is in communication with the intake flue (52) at a location downstream of the air preheater (57).