CN109442445A - A kind of novel soot blower system and its working method for station boiler horizontal flue - Google Patents
A kind of novel soot blower system and its working method for station boiler horizontal flue Download PDFInfo
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- CN109442445A CN109442445A CN201811201904.5A CN201811201904A CN109442445A CN 109442445 A CN109442445 A CN 109442445A CN 201811201904 A CN201811201904 A CN 201811201904A CN 109442445 A CN109442445 A CN 109442445A
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- soot
- soot blower
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- pressure sensor
- blowing
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J3/00—Removing solid residues from passages or chambers beyond the fire, e.g. from flues by soot blowers
- F23J3/02—Cleaning furnace tubes; Cleaning flues or chimneys
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/02—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material
- F23J15/022—Arrangements of devices for treating smoke or fumes of purifiers, e.g. for removing noxious material for removing solid particulate material from the gasflow
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J15/00—Arrangements of devices for treating smoke or fumes
- F23J15/06—Arrangements of devices for treating smoke or fumes of coolers
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Incineration Of Waste (AREA)
Abstract
The present invention relates to a kind of novel soot blower systems and its working method for station boiler horizontal flue, including soot blowing blast cap, rotation drive device, the first soot blower group, the second soot blower group, third soot blower group, the 4th soot blower group, left pressure sensor, intermediate pressure sensor, backside pressure sensor and furnace cigarette blower；4 soot blower groups include soot blowing blast cap, and soot blowing blast cap includes spout one, spout two, spout three and soot blowing gas inlet；One end of furnace cigarette blower is connect with dedusting exhanst gas outlet pipeline, and the other end is connect with 4 soot blower groups respectively.The present invention is innovatively using flue gas recycled as sootblowing dielectric, soot blowing is carried out using rotary soot blowing blast cap, the dust stratification on boiler horizontal gas pass can be removed effectively, and avoid the excessive blow loss and the generation of booster of horizontal flue water-cooling wall, pass through pressure sensor senses horizontal flue dust stratification thickness, corresponding soot blowing pitch is adjusted, blowing time and frequency are effectively instructed.
Description
Technical field
The present invention relates to a kind of soot blower system and method, especially a kind of novel soot blowing for station boiler horizontal flue
System and its working method.
Background technique
Large-sized station boiler horizontal flue and a large amount of dust stratifications of furnace arch, furnace nose are power plant generality problems.Dust stratification may seriously be led
It causes the lower part elbow of high temperature superheater to be buried in dust heap, influences heat transfer effect, and lead to tube wall local overheating when blowing out, can draw
Play insecurity factor.A large amount of dust stratifications drop suddenly on furnace arch slope, pour burner hearth, interference burning, caused adverse consequences
It is hardly imaginable.
The dust stratification for how eliminating furnace arch slope has received the attention and thinking of many people.
In order to solve the problems, such as furnace arch slope dust stratification, technology traditional at present is mainly steam sootblower and sonic soot blowing
Device, such as application No. is 201410474010.9 Chinese patents.In steam sootblower operational process, total travel is swung greatly, is easy
It collides with furnace arch, furnace nose region tube panel, steam blowing pressure is higher, causes to high temperature superheater, final reheater and furnace arch, furnace nose
Blow loss easily causes booster when serious；And influenced by tube panel gap, furnace arch, furnace nose region can not arrange steam sootblower, exist
Blower blind.Acoustic wave ash ejector energy is relatively low, there is no the work of reentrainment of dust to the dust stratification being deposited on furnace arch slope
With causing dust stratification that can not be taken away by flue gas；And furnace arch, furnace nose area operation temperature is higher, acoustic wave ash ejector is averaged service life significantly
Shorten, maintenance cost is also higher.
Steam sootblower and acoustic wave ash ejector cannot efficiently solve the dust stratification problem of furnace arch slope.Part pot at present
Funnel-cap type steam sootblower is installed in furnace horizontal flue bottom, and blowing medium is steam, but finds water-cooling wall after running a period of time
Serious wear easily causes to leak, and causes high temperature reheater booster above horizontal flue water floor, and consequence is very tight
Weight, therefore it is badly in need of a kind of effective system and method for station boiler horizontal flue dust stratification.
Summary of the invention
It is an object of the invention to overcome the defect in existing station boiler horizontal flue sootblower arrangement and system, utilize
The dust stratification on boiler horizontal gas pass can be effectively removed using rotary soot blowing blast cap as sootblowing dielectric in flue gas after dedusting,
Not only the excessive blow loss and the generation of booster of horizontal flue water-cooling wall be avoided that, but also dust stratification thickness can have been calculated according to pressure sensor,
Effectively instruct blowing time and frequency.
Technical solution used by the present invention solves the above problems is: a kind of to blow for the novel of station boiler horizontal flue
Ash system, including water-cooling wall, the water-cooling wall are connected by water-cooling wall fin, and the water-cooling wall is located at left side furnace wall and right side furnace
Between wall；It is characterized in that, further including soot blowing blast cap, rotation drive device, the first soot blower group, the second soot blower group, third
Soot blower group, the 4th soot blower group, left pressure sensor, intermediate pressure sensor, backside pressure sensor and furnace cigarette blower；
The first soot blower group, the second soot blower group, third soot blower group and the 4th soot blower group are separately positioned on different water coolings
Between wall, the first soot blower group, the second soot blower group, third soot blower group and the 4th soot blower group include soot-blowing wind
Cap, the soot blowing blast cap are rotatably arranged on water-cooling wall fin, and the rotation drive device is arranged on soot blowing blast cap；It is described
Soot blowing blast cap includes spout one, spout two, spout three and soot blowing gas inlet；One end of the furnace cigarette blower goes out with dedusting flue gas
The connection of mouthful pipeline, the other end of the furnace cigarette blower by the total pitch of furnace cigarette respectively with the first soot blower group, the second soot blower group,
Third soot blower group is connected with the 4th soot blower group, be provided between the furnace cigarette blower and the first soot blower group the first pitch and
First pressure gauge is provided with the second pitch and second pressure gauge, the furnace cigarette between the furnace cigarette blower and the second soot blower group
Be provided with third pitch and third pressure gauge between blower and third soot blower group, the furnace cigarette blower and the 4th soot blower group it
Between be provided with the 4th pitch and the 4th pressure gauge；The left pressure sensor, intermediate pressure sensor and backside pressure sensing
Device is separately positioned between different water-cooling walls.
Preferably, the first soot blower group, the second soot blower group, third soot blower group and the 4th soot blower group are wrapped
3 are included mutually in the soot blowing blast cap of 120 ° of distributions；The soot blowing pipeline of the soot blowing blast cap is located at outside burner hearth, when work, soot blowing
Flue gas arrives first the Delta Region center of 3 soot-blowing wind caps formation, reaches each soot blowing blast cap further along 3 branch pipes.
Preferably, the spout one of the soot blowing blast cap, spout two and spout three are distributed in soot blowing gas inlet in 120 °
Top；The distance on the center line of the spout one, spout two and spout three to water-cooling wall convex surface is 90mm ~ 110mm.
Preferably, being disposed with sealing bearing between the soot blowing blast cap and water-cooling wall fin, the soot blowing blast cap is revolving
Rotation soot blowing is realized under the action of rotary driving device, purges in range on water-cooling wall and anti-friction protecting watt is installed.
Preferably, the left pressure sensor is located at the left side of horizontal flue bottom, the intermediate pressure sensor
Positioned at the middle part of horizontal flue bottom, the backside pressure sensor is located at the right side of horizontal flue bottom；The left pressure
Sensor, intermediate pressure sensor and backside pressure sensor are heat resistant and wear resistant damage material.
Preferably, the left pressure sensor, intermediate pressure sensor, backside pressure sensor, the total pitch of furnace cigarette,
4th pitch, third pitch, the second pitch and the first pitch are connect with computer；When work, pass through above-mentioned 3 pressure sensings
The dust stratification thickness of device perception level flue simultaneously transmits information to computer, and computer then adjusts corresponding soot blowing pitch, soot blowing
Time carries out suitable control according to the numerical value of 3 pressure sensors.
Preferably, the 4th pressure gauge, third pressure gauge, second pressure gauge and first pressure gauge are located at the 4th
Soot blower group, third soot blower group, the second soot blower group and the first soot blower group pipeline on, aforementioned four pressure gauge is for showing
Show the pressure value of soot blowing flue gas, the pressure value control is in 0.5MPa ~ 0.8MPa.
Preferably, on the dedusting exhanst gas outlet pipeline along flow of flue gas direction be disposed with air preheater and
The import of deduster, the furnace cigarette blower is communicated with dedusting exhanst gas outlet pipeline, and is located at after deduster, for realizing flue gas
Recycle soot blowing.
The working method of the above-mentioned novel soot blower system for station boiler horizontal flue is as follows:
Step 1: flue gas in the dedusting exhanst gas outlet pipeline temperature after air preheater and deduster is 80 DEG C ~ 90 DEG C, warp
Crossing the boosting of furnace cigarette blower is 0.5MPa ~ 1MPa, respectively enters the first soot blower group, the second soot blower group, the by soot blowing pipeline
Three soot blower groups and the 4th soot blower group；
Step 2: 3 soot blowing blast caps carry out rotation soot blowing under the action of rotation drive device in each soot blower group；
Step 3: dust stratification leaves water-cooling wall bottom under the action of soot blowing flue gas, and back-end ductwork is entered under the action of air-introduced machine.
Compared with prior art, the present invention having the following advantages that and effect:
1) soot blower system is blown innovatively using flue gas recycled as sootblowing dielectric using rotary soot blowing blast cap
Ash can efficiently solve the dust stratification on boiler horizontal gas pass, and avoid the excessive blow loss and booster of horizontal flue water-cooling wall
Occur.
2) soot blower system is adjusted corresponding soot blowing pitch, is had by pressure sensor senses horizontal flue dust stratification thickness
Effect instructs blowing time and frequency.
3) soot blower system is divided into 4 different blowing pipe groups, the independent soot blowing operation of different zones may be implemented, reaching has
The soot blowing of key area.
Detailed description of the invention
Fig. 1 is the overall structure diagram of the embodiment of the present invention.
Fig. 2 is the structural schematic diagram of the soot blowing blast cap of the embodiment of the present invention.
In figure: water-cooling wall 1, water-cooling wall fin 2, sealing bearing 3, soot blowing blast cap 4, rotation drive device 5, the first soot blower
Group the 6, second soot blower group 7, third soot blower group 8, the 4th soot blower group 9, rear water wall pipe 10, left side furnace wall 11, left side
Pressure sensor 12, intermediate pressure sensor 13, backside pressure sensor 14, right side furnace wall 15, air preheater 16, deduster
17, the total pitch 19 of furnace cigarette blower 18, furnace cigarette, dedusting exhanst gas outlet pipeline 20, the 4th pressure gauge 31, third pressure gauge 32, second
Pressure gauge 33, first pressure gauge 34, spout 1, spout 2 42, spout 3 43, soot blowing gas inlet 44, the 4th pitch 51,
Three pitch 52, the second pitch 53, the first pitch 54.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawing and by embodiment, and following embodiment is to this hair
Bright explanation and the invention is not limited to following embodiments.
Embodiment.
Referring to Fig. 1 to Fig. 2, the novel soot blower system for station boiler horizontal flue in the present embodiment, including water cooling
Wall 1, water-cooling wall 1 are connected by water-cooling wall fin 2, and water-cooling wall 1 is between left side furnace wall 11 and right side furnace wall 15；It further include blowing
Grey blast cap 4, rotation drive device 5, the first soot blower group 6, the second soot blower group 7, third soot blower group 8, the 4th soot blower group
9, left pressure sensor 12, intermediate pressure sensor 13, backside pressure sensor 14 and furnace cigarette blower 18；First soot blower group
6, the second soot blower group 7, third soot blower group 8 and the 4th soot blower group 9 are separately positioned between different water-cooling walls 1, and first
Soot blower group 6, the second soot blower group 7, third soot blower group 8 and the 4th soot blower group 9 include soot blowing blast cap 4, soot blowing blast cap 4
Rotary to be arranged on water-cooling wall fin 2, rotation drive device 5 is arranged on soot blowing blast cap 4；Soot blowing blast cap 4 includes spout one
41, spout 2 42, spout 3 43 and soot blowing gas inlet 44；One end of furnace cigarette blower 18 and dedusting exhanst gas outlet pipeline 20 connect
It connects, the other end of furnace cigarette blower 18 is blown with the first soot blower group 6, the second soot blower group 7, third respectively by the total pitch 19 of furnace cigarette
Grey device group 8 and the connection of the 4th soot blower group 9, are provided with the first pitch 54 and the between furnace cigarette blower 18 and the first soot blower group 6
One pressure gauge 34 is provided with the second pitch 53 and second pressure gauge 33, furnace cigarette wind between furnace cigarette blower 18 and the second soot blower group 7
Third pitch 52 and third pressure gauge 32, furnace cigarette blower 18 and the 4th soot blower are provided between machine 18 and third soot blower group 8
The 4th pitch 51 and the 4th pressure gauge 31 are provided between group 9；Left pressure sensor 12, intermediate pressure sensor 13 and rear side
Pressure sensor 14 is separately positioned between different water-cooling walls 1.
First soot blower group 6, the second soot blower group 7, third soot blower group 8 and the 4th soot blower group 9 include 3 mutual
The soot blowing blast cap 4 being distributed in 120 °；The soot blowing pipeline of soot blowing blast cap 4 is located at outside burner hearth, and when work, soot blowing flue gas arrives first 3
The Delta Region center that soot blowing blast cap 4 is formed reaches each soot blowing blast cap 4 further along 3 branch pipes.The spout one of soot blowing blast cap 4
41, spout 2 42 and spout 3 43 are distributed in the top of soot blowing gas inlet 44 in 120 °；Spout 1, spout 2 42 and spout
The distance on 3 43 center line to 1 convex surface of water-cooling wall is 90mm ~ 110mm.It is disposed between soot blowing blast cap 4 and water-cooling wall fin 2
Bearing 3 is sealed, soot blowing blast cap 4 is realized rotation soot blowing under the action of rotation drive device 5, purged in range on water-cooling wall 1
Anti-friction protecting watt is installed.Left pressure sensor 12 is located at the left side of horizontal flue bottom, and intermediate pressure sensor 13 is located at water
The middle part of flat stack base, backside pressure sensor 14 are located at the right side of horizontal flue bottom；Left pressure sensor 12, centre
Pressure sensor 13 and backside pressure sensor 14 are heat resistant and wear resistant damage material.Left pressure sensor 12, intermediate pressure
The total pitch 19 of sensor 13, backside pressure sensor 14, furnace cigarette, the 4th pitch 51, third pitch 52, the second pitch 53 and first
Pitch 54 is connect with computer；When work, pass through the dust stratification thickness of above-mentioned 3 pressure sensor senses horizontal flues and will letter
Breath is transmitted to computer, and computer then adjusts corresponding soot blowing pitch, and blowing time is carried out according to the numerical value of 3 pressure sensors
Suitable control.4th pressure gauge 31, third pressure gauge 32, second pressure gauge 33 and first pressure gauge 34 are located at the 4th soot blowing
Device group 9, third soot blower group 8, the second soot blower group 7 and the first soot blower group 6 pipeline on, aforementioned four pressure gauge is for showing
Show the pressure value of soot blowing flue gas, pressure value general control is in 0.5MPa ~ 0.8MPa.Along cigarette on dedusting exhanst gas outlet pipeline 20
Flow of air direction is disposed with air preheater 16 and deduster 17, the import of furnace cigarette blower 18 and dedusting exhanst gas outlet pipeline
20 communicate, and are located at after deduster 17, for realizing flue gas recirculation soot blowing.
The working method of the above-mentioned novel soot blower system for station boiler horizontal flue is as follows:
Step 1: flue gas in dedusting exhanst gas outlet pipeline 20 temperature after air preheater 16 and deduster 17 is 80 DEG C ~
90 DEG C, it is 0.5MPa ~ 1MPa by the boosting of furnace cigarette blower 18, the first soot blower group 6, second is respectively enterd by soot blowing pipeline
Soot blower group 7, third soot blower group 8 and the 4th soot blower group 9；
Step 2: 3 soot blowing blast caps 4 carry out rotation soot blowing under the action of rotation drive device 5 in each soot blower group；
Step 3: dust stratification leaves 1 bottom of water-cooling wall under the action of soot blowing flue gas, and tail portion cigarette is entered under the action of air-introduced machine
Road.
It is any to be familiar with although the present invention is disclosed as above with embodiment, its protection scope being not intended to limit the invention
The technical staff of this technology changes and retouches made without departing from the spirit and scope of the invention, should belong to this hair
Bright protection scope.
Claims (9)
1. a kind of novel soot blower system for station boiler horizontal flue, including water-cooling wall (1), the water-cooling wall (1) passes through
Water-cooling wall fin (2) connection, the water-cooling wall (1) are located between left side furnace wall (11) and right side furnace wall (15)；It is characterized in that,
It further include soot blowing blast cap (4), rotation drive device (5), the first soot blower group (6), the second soot blower group (7), third soot blower
Group (8), the 4th soot blower group (9), left pressure sensor (12), intermediate pressure sensor (13), backside pressure sensor
(14) and furnace cigarette blower (18)；The first soot blower group (6), the second soot blower group (7), third soot blower group (8) and the 4th
Soot blower group (9) is separately positioned between different water-cooling walls (1), the first soot blower group (6), the second soot blower group (7),
Third soot blower group (8) and the 4th soot blower group (9) include soot blowing blast cap (4), and rotatably setting exists the soot blowing blast cap (4)
On water-cooling wall fin (2), the rotation drive device (5) is arranged on soot blowing blast cap (4)；The soot blowing blast cap (4) includes spray
One (41) of mouth, spout two (42), spout three (43) and soot blowing gas inlet (44)；One end of the furnace cigarette blower (18) and dedusting
Exhanst gas outlet pipeline (20) connection, the other end of the furnace cigarette blower (18) by the total pitch of furnace cigarette (19) respectively with the first soot blowing
Device group (6), the second soot blower group (7), third soot blower group (8) and the connection of the 4th soot blower group (9), the furnace cigarette blower (18)
It is provided with the first pitch (54) and first pressure gauge (34) between the first soot blower group (6), the furnace cigarette blower (18) and the
The second pitch (53) and second pressure gauge (33) are provided between two soot blower groups (7), the furnace cigarette blower (18) is blown with third
Third pitch (52) and third pressure gauge (32), the furnace cigarette blower (18) and the 4th soot blower are provided between grey device group (8)
The 4th pitch (51) and the 4th pressure gauge (31) are provided between group (9)；The left pressure sensor (12), intermediate pressure pass
Sensor (13) and backside pressure sensor (14) are separately positioned between different water-cooling walls (1).
2. the novel soot blower system according to claim 1 for station boiler horizontal flue, which is characterized in that described
One soot blower group (6), the second soot blower group (7), third soot blower group (8) and the 4th soot blower group (9) include 3
The soot blowing blast cap (4) of 120 ° of distributions；The soot blowing pipeline of the soot blowing blast cap (4) is located at outside burner hearth, and when work, soot blowing flue gas is first
The Delta Region center formed to 3 soot blowing blast caps (4) reaches each soot blowing blast cap (4) further along 3 branch pipes.
3. the novel soot blower system according to claim 1 for station boiler horizontal flue, which is characterized in that described to blow
Spout one (41), spout two (42) and the spout three (43) of grey blast cap (4) are distributed in the upper of soot blowing gas inlet (44) in 120 °
Side；The center line of the spout one (41), spout two (42) and spout three (43) to water-cooling wall (1) convex surface distance be 90mm ~
110mm。
4. the novel soot blower system according to claim 1 for station boiler horizontal flue, which is characterized in that described to blow
Sealing bearing (3) is disposed between grey blast cap (4) and water-cooling wall fin (2), the soot blowing blast cap (4) is in rotation drive device
(5) rotation soot blowing is realized under the action of, purges in range on water-cooling wall (1) and anti-friction protecting watt is installed.
5. the novel soot blower system according to claim 1 for station boiler horizontal flue, which is characterized in that the left side
Side pressure sensor (12) is located at the left side of horizontal flue bottom, and the intermediate pressure sensor (13) is located at horizontal flue bottom
Middle part, the backside pressure sensor (14) is located at the right side of horizontal flue bottom；The left pressure sensor (12), in
Between pressure sensor (13) and backside pressure sensor (14) be heat resistant and wear resistant damage material.
6. the novel soot blower system according to claim 1 for station boiler horizontal flue, which is characterized in that the left side
Side pressure sensor (12), intermediate pressure sensor (13), backside pressure sensor (14), the total pitch of furnace cigarette (19), the 4th adjust
Door (51), third pitch (52), the second pitch (53) and the first pitch (54) are connect with computer；When work, pass through above-mentioned 3
The dust stratification thickness of a pressure sensor senses horizontal flue simultaneously transmits information to computer, and computer then adjusts corresponding soot blowing
Pitch, blowing time carry out suitable control according to the numerical value of 3 pressure sensors.
7. the novel soot blower system according to claim 1 for station boiler horizontal flue, which is characterized in that described
Four pressure gauges (31), third pressure gauge (32), second pressure gauge (33) and first pressure gauge (34) are located at the 4th soot blower
Group (9), third soot blower group (8), the second soot blower group (7) and the first soot blower group (6) pipeline on, aforementioned four pressure gauge
For showing the pressure value of soot blowing flue gas, the pressure value control is in 0.5MPa ~ 0.8MPa.
8. the novel soot blower system according to claim 1 for station boiler horizontal flue, which is characterized in that described to remove
It is disposed with air preheater (16) and deduster (17) along flow of flue gas direction on cloud of dust gas outlet conduit (20), it is described
The import of furnace cigarette blower (18) is communicated with dedusting exhanst gas outlet pipeline (20), and is located at after deduster (17), for realizing cigarette
Gas recycles soot blowing.
9. a kind of novel soot blowing system as claimed in any one of claims 1-8 for station boiler horizontal flue
The working method of system, which is characterized in that the working method is as follows:
Step 1: flue gas in dedusting exhanst gas outlet pipeline (20) temperature after air preheater (16) and deduster (17) is
80 DEG C ~ 90 DEG C, it is 0.5MPa ~ 1MPa by furnace cigarette blower (18) boosting, the first soot blower group is respectively enterd by soot blowing pipeline
(6), the second soot blower group (7), third soot blower group (8) and the 4th soot blower group (9)；
Step 2: 3 soot blowing blast caps (4) carry out rotation soot blowing under the action of rotation drive device (5) in each soot blower group；
Step 3: dust stratification leaves water-cooling wall (1) bottom under the action of soot blowing flue gas, and tail portion cigarette is entered under the action of air-introduced machine
Road.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811201904.5A CN109442445A (en) | 2018-10-16 | 2018-10-16 | A kind of novel soot blower system and its working method for station boiler horizontal flue |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811201904.5A CN109442445A (en) | 2018-10-16 | 2018-10-16 | A kind of novel soot blower system and its working method for station boiler horizontal flue |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110805918A (en) * | 2019-10-16 | 2020-02-18 | 华电电力科学研究院有限公司 | Device and method for blowing soot by using bypass flue gas |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110805918A (en) * | 2019-10-16 | 2020-02-18 | 华电电力科学研究院有限公司 | Device and method for blowing soot by using bypass flue gas |
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