CN212408704U - Soot blowing system for cleaning accumulated soot in horizontal flue of boiler by adopting double media - Google Patents
Soot blowing system for cleaning accumulated soot in horizontal flue of boiler by adopting double media Download PDFInfo
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- CN212408704U CN212408704U CN202021204657.7U CN202021204657U CN212408704U CN 212408704 U CN212408704 U CN 212408704U CN 202021204657 U CN202021204657 U CN 202021204657U CN 212408704 U CN212408704 U CN 212408704U
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- horizontal flue
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Abstract
The utility model discloses a soot blowing system for cleaning the soot deposition in the horizontal flue of a boiler by adopting double media, which comprises a soot blowing gun system, the horizontal flue, a soot blowing steam source of a boiler body, a steam pipeline shut-off valve, a compressed air soot blowing steam source and an air pipeline shut-off valve; the outlet of the soot blowing gun system is inserted into the horizontal flue, the soot blowing steam source of the boiler body is communicated with the inlet of the soot blowing gun system through the steam pipeline shutoff valve, and the compressed air soot blowing steam source is communicated with the inlet of the soot blowing gun system through the air pipeline shutoff valve.
Description
Technical Field
The utility model belongs to the technical field of thermal power, a adopt two medium clearance boiler horizontal flue deposition's soot blowing system is related to.
Background
The pulverized coal is combusted in the hearth to generate a large amount of flue gas, and fly ash particles carried by the flue gas are accumulated in the flue and on the tube panel of the heating surface to form accumulated ash. Especially in the horizontal flue after the flame is bent in the hearth, fly ash particles are easy to accumulate at the horizontal flue due to the change of a flow field in the flue, and an ash accumulation layer is formed. Particularly, in recent years, when the thermal power unit is frequently operated in a peak shaving mode, the boiler needs to be frequently operated at a low load, the furnace temperature is relatively low, the pulverized coal burnout rate is low, and particles carried in smoke are relatively thick, so that the particles in the smoke are easy to accumulate ash in a horizontal flue. Tests show that the thickness of the deposited dust of the horizontal flue can even reach about 1.5m after the machine set is stopped for a long time in peak shaving operation.
The heat transfer capability of the heating surface in the furnace is reduced due to the ash deposition of the vertical combustion section of the hearth, so that the flame center in the furnace moves backwards, the temperature of the outlet of the hearth is increased, and the economical efficiency of the boiler is reduced. Slagging or ash deposition on the screen superheater and the convection heating surface can further increase the thermal deviation of the heating surface, so that the risk of tube explosion of the boiler is increased. If the ash deposition of the horizontal flue is thick, the ventilation resistance is increased, the power consumption of a blower and an induced draft fan is increased, and the output of the boiler is limited in severe cases. In order to avoid bad influence caused by dust deposition, a soot blower is arranged on a key heating surface of the boiler for online soot blowing. However, the horizontal flue behind the flame folding angle in the furnace is lack of an online soot blower, and the accumulated soot of the part can only wait for the boiler to stop running and then enter the flue by workers, and then the compressed air is used for manually cleaning the soot, so that the soot cleaning working environment is severe and scalding accidents are easy to happen. According to investigation, the accident that field workers are scalded due to incomplete cooling of accumulated dust occurs in a power plant for many times.
Therefore, the increase of the soot blower for online cleaning accumulated dust in the horizontal flue and the soot blower for automatically cleaning the horizontal flue during forced ventilation and cooling after furnace shutdown become practical problems to be solved urgently at present in a power plant. The utility model discloses combine present actual operation's needs and the characteristic of horizontal flue deposition, provided the system of two medium clearance horizontal flue depositions to improve the economic nature of boiler operation and the incident of avoiding artifical deashing production after blowing out.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to overcome above-mentioned prior art's shortcoming, provide an adopt two medium clearance boiler horizontal flue deposition's soot blowing system, this system can realize clearing up horizontal flue deposition on line to improve the economic nature of power plant's operation, can be simultaneously in blowing out the back forced draft, avoid the incident that artifical clearance deposition causes.
In order to achieve the purpose, the soot blowing system for cleaning the accumulated soot in the horizontal flue of the boiler by adopting the double media comprises a soot blowing gun system, the horizontal flue, a soot blowing steam source of a boiler body, a steam pipeline shutoff valve, a compressed air soot blowing steam source and an air pipeline shutoff valve;
the outlet of the soot blowing gun system is inserted into the horizontal flue, the soot blowing steam source of the boiler body is communicated with the inlet of the soot blowing gun system through a steam pipeline shut-off valve, and the compressed air soot blowing steam source is communicated with the inlet of the soot blowing gun system through an air pipeline shut-off valve.
The soot blowing gun system comprises a first soot blowing gun and a second soot blowing gun, wherein the first soot blowing gun and the second soot blowing gun are respectively positioned on two sides of the horizontal flue, and the first soot blowing gun and the second soot blowing gun are communicated with the steam pipeline shutoff valve and the air pipeline shutoff valve.
First soot blowing gun and second soot blowing gun all include duckbilled formula air knife, soot blowing gun barrel, soot blowing gun advancing mechanism and be used for carrying out the soot blowing gun guide bracket that leads to soot blowing gun barrel, wherein, soot blowing gun guide bracket and duckbilled formula air knife all are located horizontal flue, soot blowing gun advancing mechanism is connected with the one end that soot blowing gun barrel, the other end that soot blowing gun barrel inserts in horizontal flue and is located soot blowing gun guide bracket, duckbilled formula air knife communicates on soot blowing gun barrel, boiler body soot blowing steam source is linked together through steam conduit shutoff valve and soot blowing gun barrel, compressed air soot blowing steam source is linked together through air conduit shutoff valve and soot blowing gun barrel.
A steam pipeline check valve is arranged between the steam pipeline shut-off valve and the soot blowing gun system.
An air pipeline check valve is arranged between the air pipeline shutoff valve and the soot blowing gun system.
An anti-scouring guard plate is arranged on the inner wall of the bottom of the horizontal flue, wherein the anti-scouring guard plate is positioned below the duckbilled air knife.
The spraying direction of the duckbilled air knives is arranged along the flowing downstream direction of the smoke and inclines downwards.
The utility model discloses following beneficial effect has:
adopt two medium clearance boiler horizontal flue deposition blow off the ash system when concrete operation, when the unit moves, blow the soot source through the boiler body and carry out online steam cleaning to horizontal flue's deposition, reduce exerting oneself of draught fan to reduce the station service power rate. After the unit is shut down, because lack high temperature steam vapour source, blow the deposition of ash source horizontal flue through compressed air and carry out the air cleaning, the personal scald accident that takes place when avoiding artifical clearance, the air cleaning deposition can also accelerate boiler cooling rate simultaneously.
Drawings
FIG. 1 is a schematic diagram of the system of the present invention;
fig. 2 is a schematic structural diagram of a second sootblower 8 and an anti-erosion guard plate 10 according to the present invention.
Wherein, 1 is boiler body soot blowing steam source, 2 is steam pipe shut-off valve, 3 is steam pipe check valve, 4 is compressed air soot blowing steam source, 5 is air pipe shut-off valve, 6 is air pipe check valve, 7 is first soot blowing rifle, 8 is the second soot blowing rifle, 9 is horizontal flue, 10 is the scour prevention backplate, 11 is duckbilled air knife, 12 is soot blower advancing mechanism, 13 is the soot blowing barrel, 14 is soot blowing rifle guide bracket.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings:
referring to fig. 1 and 2, the soot blowing system for cleaning the soot in the horizontal flue of the boiler by using the dual media of the present invention includes a soot blowing gun system, a horizontal flue 9, a soot blowing steam source 1 of the boiler body, a steam pipeline shut-off valve 2, a soot blowing steam source 4 of compressed air and an air pipeline shut-off valve 5; the outlet of the soot blowing gun system is inserted into the horizontal flue 9, the soot blowing steam source 1 of the boiler body is communicated with the inlet of the soot blowing gun system through the steam pipeline shut-off valve 2, and the compressed air soot blowing steam source 4 is communicated with the inlet of the soot blowing gun system through the air pipeline shut-off valve 5.
The soot blowing gun system comprises a first soot blowing gun 7 and a second soot blowing gun 8, wherein the first soot blowing gun 7 and the second soot blowing gun 8 are respectively positioned at two sides of a horizontal flue 9, the first soot blowing gun 7 and the second soot blowing gun 8 are respectively communicated with a steam pipeline shutoff valve 2 and an air pipeline shutoff valve 5, the first soot blowing gun 7 and the second soot blowing gun 8 respectively comprise a duckbilled air knife 11, a soot blowing gun barrel 13, a soot blowing gun propelling mechanism 12 and a soot blowing gun guide bracket 14 for guiding the soot blowing gun barrel 13, wherein the soot blowing gun guide bracket 14 and the duckbilled air knife 11 are both positioned in the horizontal flue 9, the soot blowing gun propelling mechanism 12 is connected with one end of the soot blowing gun barrel 13, the other end of the soot blowing gun barrel 13 is inserted into the horizontal flue 9 and positioned on the soot blowing gun guide bracket 14, the duckbilled air knife 11 is communicated with the soot blowing gun barrel 13, a boiler body 1 is communicated with the soot blowing gun barrel 13 through the steam pipeline shutoff valve 2, the compressed air soot blowing steam source 4 is communicated with a soot blowing gun barrel 13 through an air pipeline shutoff valve 5, and an anti-scouring protection plate 10 is arranged on the inner wall of the bottom of the horizontal flue 9, wherein the anti-scouring protection plate 10 is positioned below the duckbilled air knife 11.
A steam pipeline check valve 3 is arranged between the steam pipeline shut-off valve 2 and the soot blowing gun system; an air pipeline check valve 6 is arranged between the air pipeline shutoff valve 5 and the soot blowing gun system.
The duckbilled air knives 11 are arranged on the soot blowing gun barrels 13, the spraying directions of the duckbilled air knives 11 are arranged along the smoke flowing downstream direction and incline downwards, the soot blowing gun barrels 13 are symmetrically inserted from the same horizontal section of two sides of the horizontal flue 9, the maximum displacement length of a single soot blowing gun barrel 13 is half of the width of the horizontal flue 9, and the soot blowing gun propelling mechanisms 12 drive the soot blowing gun barrels 13 to transversely stretch and move on the soot blowing gun guide supports 14.
The area of the anti-scouring guard plate 10 covers the purging area of the duckbilled air knife 11, and the anti-scouring guard plate 10 is made of anti-scouring and anti-abrasion materials.
When the boiler is in operation and on-line soot blowing is needed to be performed on the horizontal flue 9, high-temperature and high-pressure steam can be introduced through the soot blowing steam source 1 of the boiler body, the high-temperature and high-pressure steam flows through the steam pipeline shut-off valve 2 and the steam pipeline check valve 3 and enters the soot blowing gun barrel 13, and the steam is used for performing steam cleaning on the accumulated dust in the horizontal flue 9 through the duckbilled air knife 11. The sootblower barrel 13 is fed into the horizontal flue 9 by the sootblower advancing mechanism 12, and the sootblower barrel 13 moves slowly and at a constant speed during its stroke. The dust deposition of the horizontal flue 9 is blown to a suspension state from a static state at the bottom of the horizontal flue 9 by high-speed steam sprayed by the duckbilled air knives 11, and the dust deposition deposited by the horizontal flue 9 enters a dust removal system of the boiler along with the flow direction of flue gas under the carrying effect of the flue gas, so that the online cleaning process of the dust deposition is completed. And the compressed air soot blowing steam source 4 is forbidden to be used for blowing soot to the horizontal flue 9 in the running state of the boiler, so that the disturbance of a large amount of air mixed in the flue gas to an oxygen amount regulating system of the boiler is prevented.
When the boiler is stopped and the blower is driven to run and the horizontal flue 9 needs to be blown, compressed air is introduced through the compressed air blowing steam source 4, flows through the air pipeline shutoff valve 5 and the air pipeline check valve 6 and then enters the blowing gun barrel 13, and the air cleans dust accumulated in the stopped horizontal flue 9 through the duckbilled air knife 11.
Claims (7)
1. A soot blowing system for cleaning accumulated soot in a horizontal flue of a boiler by adopting double media is characterized by comprising a soot blowing gun system, the horizontal flue (9), a soot blowing steam source (1) of a boiler body, a steam pipeline shutoff valve (2), a compressed air soot blowing steam source (4) and an air pipeline shutoff valve (5);
the outlet of the soot blowing gun system is inserted into the horizontal flue (9), the soot blowing steam source (1) of the boiler body is communicated with the inlet of the soot blowing gun system through a steam pipeline shut-off valve (2), and the compressed air soot blowing steam source (4) is communicated with the inlet of the soot blowing gun system through an air pipeline shut-off valve (5).
2. The soot blowing system for cleaning the accumulated soot in the horizontal flue of the boiler by using the dual media as claimed in claim 1, wherein the soot blowing gun system comprises a first soot blowing gun (7) and a second soot blowing gun (8), wherein the first soot blowing gun (7) and the second soot blowing gun (8) are respectively located at two sides of the horizontal flue (9), and the first soot blowing gun (7) and the second soot blowing gun (8) are both communicated with the steam pipeline shut-off valve (2) and the air pipeline shut-off valve (5).
3. The soot blowing system for cleaning soot in a horizontal flue of a boiler by using double media as claimed in claim 2, wherein each of the first soot blowing gun (7) and the second soot blowing gun (8) comprises a duckbilled air knife (11), a soot blowing gun barrel (13), a soot blowing gun propelling mechanism (12) and a soot blowing gun guiding bracket (14) for guiding the soot blowing gun barrel (13), wherein the soot blowing gun guiding bracket (14) and the duckbilled air knife (11) are both located in the horizontal flue (9), the soot blowing gun propelling mechanism (12) is connected with one end of the soot blowing gun barrel (13), the other end of the soot blowing gun barrel (13) is inserted into the horizontal flue (9) and located on the soot blowing gun guiding bracket (14), the duckbilled air knife (11) is communicated with the soot blowing gun barrel (13), and a soot blowing air source (1) of a boiler body is communicated with the soot blowing gun barrel (13) through a steam pipeline shut-off valve (2), the compressed air soot blowing steam source (4) is communicated with the soot blowing gun barrel (13) through an air pipeline shutoff valve (5).
4. The soot blowing system for cleaning the accumulated soot in the horizontal flue of the boiler by adopting the double media as recited in claim 1, wherein a steam pipeline check valve (3) is arranged between the steam pipeline shut-off valve (2) and the soot blowing gun system.
5. The soot blowing system for cleaning the accumulated soot in the horizontal flue of the boiler by adopting the dual media as recited in claim 1, wherein an air pipeline check valve (6) is arranged between the air pipeline shutoff valve (5) and the soot blowing gun system.
6. The soot blowing system for cleaning the accumulated soot in the horizontal flue of the boiler by using the dual media according to claim 3, wherein the inner wall of the bottom of the horizontal flue (9) is provided with an anti-scouring guard plate (10), and the anti-scouring guard plate (10) is positioned below the duckbilled air knife (11).
7. The soot blowing system for cleaning the soot deposited on the horizontal flue of the boiler by using the dual media according to claim 3, wherein the spraying direction of the duckbill air knives (11) is arranged along the downstream direction of the flow of the flue gas and is inclined downwards.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021204657.7U CN212408704U (en) | 2020-06-24 | 2020-06-24 | Soot blowing system for cleaning accumulated soot in horizontal flue of boiler by adopting double media |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021204657.7U CN212408704U (en) | 2020-06-24 | 2020-06-24 | Soot blowing system for cleaning accumulated soot in horizontal flue of boiler by adopting double media |
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| CN212408704U true CN212408704U (en) | 2021-01-26 |
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| CN202021204657.7U Active CN212408704U (en) | 2020-06-24 | 2020-06-24 | Soot blowing system for cleaning accumulated soot in horizontal flue of boiler by adopting double media |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111623367A (en) * | 2020-06-24 | 2020-09-04 | 西安西热节能技术有限公司 | Soot blowing system for cleaning accumulated soot in horizontal flue of boiler by adopting double media |
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2020
- 2020-06-24 CN CN202021204657.7U patent/CN212408704U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111623367A (en) * | 2020-06-24 | 2020-09-04 | 西安西热节能技术有限公司 | Soot blowing system for cleaning accumulated soot in horizontal flue of boiler by adopting double media |
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