CN106196114B - A kind of Pulverized Coal fired Boiler Furnace soot blower - Google Patents
A kind of Pulverized Coal fired Boiler Furnace soot blower Download PDFInfo
- Publication number
- CN106196114B CN106196114B CN201610744432.2A CN201610744432A CN106196114B CN 106196114 B CN106196114 B CN 106196114B CN 201610744432 A CN201610744432 A CN 201610744432A CN 106196114 B CN106196114 B CN 106196114B
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- Prior art keywords
- burner hearth
- tertiary air
- pipe
- soot blowing
- boiler
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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
- F23J1/00—Removing ash, clinker, or slag from combustion chambers
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
Abstract
The present invention relates to a kind of Pulverized Coal fired Boiler Furnace soot blower, it includes boiler（13）, boiler（13）Head is provided with burner（14）, burner（14）On be provided with wind inlet three times（1）, boiler（13）Afterbody is disposed with deduster（7）, air-introduced machine（8）And chimney（9）, air-introduced machine（8）With chimney（9）Between access wind turbine three times（11）, wind turbine three times（11）Outlet connect tertiary air main pipe（12）, boiler（13）Burner hearth in be provided with burner hearth tertiary air main pipe（2）With soot blowing manifold（6）, tertiary air main pipe（12）Respectively with burner hearth tertiary air main pipe（2）Wind inlet three times（1）It is connected, burner hearth tertiary air main pipe（2）On be provided with burner hearth tertiary air and be in charge of（3）, soot blowing manifold（6）On be provided with soot blower for boiler hearth（4）.A kind of Pulverized Coal fired Boiler Furnace soot blower of the present invention, it can solve the problems, such as that blowing pipe faces high temperature melt in burner hearth, while effectively reduce NOxRaw emissions value.
Description
Technical field
The present invention relates to a kind of Pulverized Coal fired Boiler Furnace soot blower, the soot blowing system especially suitable for environment-protecting industrial pulverized-coal fired boiler
System, is mainly used for the purging of the burner hearth bottom flyash of boiler.
Background technology
The resources characteristic of China's few gas rich in coal and poor in oil determines that coal is the main body energy, following considerably long in the period of in,
Coal will not change as the status of the main body energy.With the research and development and practice of China's more than ten years, the development of industrial coal powder boiler
Significant progress is obtained, industrial coal powder boiler cleans coal dust as fuel using high-quality, high activity, is the backup of natural gas boiler
Or substitute.Its essential attribute includes clean hygiene, and working environment is friendly, system totally-enclosed, and smokeless and dust, which is run, to be emitted, at the same time
Environmental protection and energy saving, boiler efficiency and discharge standard are suitable with natural gas boiler.This just determines that industrial coal powder boiler must possess
Kind soot blower system, while ash-slag disposal system is closed to avoid the dust pollution in conventional boiler lime-ash discharge process.In combination with
The total NO of combustion processxMechanism of production, reduce NOxOriginal discharge concentration, with reach industrial coal powder boiler cleaning, environmental protection, efficiently
Advantage.
Patent document CN202938321U discloses a kind of soot blower system of pulverized-coal fired boiler, by the soot blowing of pulverized-coal fired boiler and removes
Dirt, smoke evacuation disjunctor design, high-efficiency environment friendly.But the limitation of its structure causes burner hearth soot blowing, level-one boiler pair in implementation process
The soot blowing that flowing bundle soot blowing, two level boiler convection restrain three positions carries out successively to be blown in turn, due to the temperature in burner hearth
It is higher, the burner hearth soot blowing jet pipe 15 in burner hearth is arranged in after soot blowing is stopped, and tube wall temperature loses the cooling of low-temperature flue gas, burner hearth
Central temperature is up to more than 1100 DEG C, even the heat resisting steel material of 25Ni20 also faces thawing.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of Pulverized Coal fired Boiler Furnace soot blowing dress for the above-mentioned prior art
Put, it can solve the problems, such as that blowing pipe faces high temperature melt in burner hearth, while effectively reduce NOxRaw emissions value.
Technical solution is used by the present invention solves the above problems：A kind of Pulverized Coal fired Boiler Furnace soot blower, it includes
Boiler, the boiler head are provided with burner, and wind inlet three times is provided with the burner, and the boiler tail passes through cigarette
Air pipe, which is sequentially connected, is provided with deduster, air-introduced machine and chimney, passes through on the flue gas pipeline between the air-introduced machine and chimney
Wind turbine, the air outlet of the wind turbine three times connect tertiary air main pipe, the interior left and right two of burner hearth of the boiler three times for connecting line access
Side is respectively arranged with burner hearth tertiary air main pipe and soot blowing manifold, the burner hearth tertiary air main pipe and the vertical section of burner hearth of soot blowing manifold
Direction arranges that the tertiary air main pipe is divided into two-way, accesses burner hearth tertiary air main pipe all the way, another way access burner is three times
Wind inlet, it is horizontally disposed in the burner hearth tertiary air main pipe to there is burner hearth tertiary air to be in charge of, along water on the soot blowing manifold
Square to being provided with soot blower for boiler hearth.
The soot blower for boiler hearth includes burner hearth soot blowing main pipe, and the burner hearth soot blowing main pipe is arranged in the horizontal direction, the stove
Burner hearth soot blowing jet pipe is provided with thorax soot blowing main pipe, the burner hearth tertiary air, which is in charge of, is provided with burner hearth tertiary air branch pipe, described
Burner hearth tertiary air branch pipe is set on the outside of burner hearth soot blowing jet pipe.
The burner hearth soot blowing jet pipe is interrupted soot blowing into burner hearth, and the burner hearth tertiary air branch pipe continues to be sent into three into burner hearth
Secondary wind.
Circular tube cover is provided with the top of the burner hearth tertiary air branch pipe and burner hearth soot blowing jet pipe, the circle tube cover diameter is big
Small identical with burner hearth tertiary air branch pipe diameter, the unilateral or bilateral of burner hearth tertiary air branch pipe and burner hearth the soot blowing jet pipe opens up
There is square spray orifice, the square spray orifice is located on the downside of circular tube cover, and the square spray orifice on the burner hearth soot blowing jet pipe is less than burner hearth
Square spray orifice on tertiary air branch pipe.
Corresponding control valve is connected to respectively between the burner hearth tertiary air main pipe, soot blowing manifold, soot blower for boiler hearth.
The burner hearth tertiary air branch pipe is from perforate among burner hearth membrane wall band steel, with band steel sealing welding.
It is stainless steel that the burner hearth tertiary air branch pipe and burner hearth soot blowing jet pipe, which are located at burner hearth interior section, positioned at burner hearth
Outside is carbon steel material.
Compared with prior art, the advantage of the invention is that：
1st, the low temperature drawn from the flue gas pipeline between the air-introduced machine and chimney after boiler tail house outlet（160℃
Below）, clean flue gas as burning tertiary air, burn excessive oxygen quotient by reducing so as to reducing burning NOxGrowing amount；
2nd, the low temperature drawn from the flue gas pipeline between the air-introduced machine and chimney after boiler tail house outlet（160℃
Below）, clean flue gas as burning tertiary air, by reducing fire box temperature so as to reducing NOxGrowing amount；
3rd, the low temperature drawn from the flue gas pipeline between the air-introduced machine and chimney after boiler tail house outlet（160℃
Below）, clean flue gas parcel burner hearth soot blowing jet pipe outside, stop the gap of injection in burner hearth soot blowing jet pipe, reduce burner hearth
The wall temperature of soot blowing jet pipe, extends burner hearth soot blowing lance life；
4th, burner hearth tertiary air branch pipe, burner hearth soot blowing jet pipe top one side or both sides are provided with square injection hole, the spray of burner hearth soot blowing
Tube top portion installs circular tube cover additional, and purging orientation, blowing force are concentrated, and square injection hole site is higher than membrane wall pipe highest point, avoids blowing
Grey air-flow, which is directly directly blown heating surface tube, causes pipe to damage；
5th, soot blower is stainless steel inside burner hearth, is resistant to burner hearth high temperature；It is carbon steel material outside burner hearth, saves
Material cost.
Brief description of the drawings
Fig. 1 is a kind of structure diagram of Pulverized Coal fired Boiler Furnace soot blower of the present invention.
Fig. 2 is the structure diagram of soot blower for boiler hearth in Fig. 1.
Fig. 3 is the structure diagram of burner hearth soot blowing jet pipe in Fig. 2.
Fig. 4 is the left view of Fig. 3.
Fig. 5 is the A-A sectional views of Fig. 3.
Wherein：
Burner wind inlet 1 three times
Burner hearth tertiary air main pipe 2
Burner hearth tertiary air is in charge of 3
Burner hearth tertiary air branch pipe 3.1
Soot blower for boiler hearth 4
Burner hearth soot blowing main pipe 4.1
Burner hearth soot blowing jet pipe 4.2
Circular tube cover 4.3
Soot blowing manifold 6
Deduster 7
Air-introduced machine 8
Chimney 9
Flue gas pipeline 10
Wind turbine 11 three times
Tertiary air manifold 12
Boiler 13
Burner 14
Connecting line 15.
Embodiment
The present invention is described in further detail below in conjunction with attached drawing embodiment.
As shown in Fig. 1 ~ Fig. 5, a kind of Pulverized Coal fired Boiler Furnace soot blower in the present embodiment, it includes boiler 13, described
13 head of boiler is provided with burner 14, and wind inlet 1 three times is provided with the burner 14, and 13 afterbody of boiler passes through cigarette
Air pipe 10, which is sequentially connected, is provided with deduster 7, air-introduced machine 8 and chimney 9, the flue gas pipeline between the air-introduced machine 8 and chimney 9
Wind turbine 11 three times are accessed by connecting line 15 on 10, the air outlet of the wind turbine three times 11 connects tertiary air main pipe 12, the pot
The left and right sides is respectively arranged with burner hearth tertiary air main pipe 2 and soot blowing manifold 6, the burner hearth tertiary air main pipe 2 in the burner hearth of stove 13
Vertical burner hearth cross-wise direction arrangement, the tertiary air main pipe 12 are divided into two-way with soot blowing manifold 6, and it is female to access burner hearth tertiary air all the way
Pipe 2, another way access wind inlet 1 three times of burner 14, horizontally disposed in the burner hearth tertiary air main pipe 2 to have burner hearth
Tertiary air is in charge of 3, horizontally disposed on the soot blowing manifold 6 to have soot blower for boiler hearth 4；
The soot blower for boiler hearth 4 includes burner hearth soot blowing main pipe 4.1, and the burner hearth soot blowing main pipe 4.1 is arranged in the horizontal direction,
Burner hearth soot blowing jet pipe 4.2 is provided with the burner hearth soot blowing main pipe 4.1, the burner hearth tertiary air, which is in charge of on 3, is provided with burner hearth three
Secondary wind branch pipe 3.1, the burner hearth tertiary air branch pipe 3.1 are set in the outside of burner hearth soot blowing jet pipe 4.2；
Corresponding control valve is connected to respectively between the burner hearth tertiary air main pipe 2, soot blowing manifold 6, soot blower for boiler hearth 4；
The burner hearth tertiary air branch pipe 3.1 is from perforate among burner hearth membrane wall band steel, with band steel sealing welding；
The top of burner hearth tertiary air branch pipe 3.1 and burner hearth soot blowing jet pipe 4.2 is provided with circular tube cover 4.3, the circle
4.3 diameter of tube cover is identical with burner hearth tertiary air 3.1 diameters of branch pipe, the burner hearth tertiary air branch pipe 3.1 and the spray of burner hearth soot blowing
The unilateral or bilateral of pipe 4.2 offers square spray orifice, and the square spray orifice is located at the circular downside of tube cover 4.3, and the burner hearth is blown
Square spray orifice on grey jet pipe 4.2 is less than the square spray orifice on burner hearth tertiary air branch pipe 3.1 so that the injection of burner hearth soot blowing jet pipe
Hole site is higher than membrane wall pipe highest point, avoids soot blowing air-flow from being directly blown membrane wall pipe, avoids soot blowing air-flow to burner hearth film
The damage of formula wall pipe.
It is stainless steel that the burner hearth tertiary air branch pipe 3.1 and burner hearth soot blowing jet pipe 4.2, which are located at burner hearth interior section, position
It is carbon steel material outside burner hearth.
Sootblowing dielectric is the compressed air of 0.6Mpa or so, and compressed air is with the setpoint frequency of 5-10min, to burner hearth bottom
Periodically it is blown, injection frequency can be adjusted according to ash quantity.Lasting burner hearth tertiary air air-flow is in burner hearth hot environment
The burner hearth soot blowing jet pipe worked intermittently plays the role of cooling down, while low temperature（Less than 160 DEG C）It is clean（Bag filter goes out
Suck dust quantity<30mg/Nm3）Flue gas as tertiary air, it is uniform even into burner hearth, fire box temperature field along length of flame direction,
Localized hyperthermia is avoided, not only can be to avoid Boiler Furnace slagging（It is burnt）, heat transfer deterioration, and NO can be effectively reducedxGrowing amount, with coal
Powder Industrial Boiler " coal dust concentrated phase（Catch fire）Burning tissues, stable burning room's semi-gas burning tissues, the gentle burning tissues of burner hearth "
Technological thought is perfectly in harmony.
The low temperature drawn from the flue gas pipeline between the air-introduced machine and chimney after boiler tail house outlet（160 DEG C with
Under）, clean flue gas distributes to burner hearth tertiary air branch pipe, burner hearth tertiary air branch pipe by burner hearth tertiary air main pipe and is set in burner hearth
The outside of soot blowing jet pipe, in the gap that burner hearth soot blowing jet pipe stops injection to being continuously fed to tertiary air in burner hearth, reduces burner hearth and blows
The wall temperature of grey jet pipe, extends burner hearth soot blowing lance life.
Burner hearth soot blowing jet pipe blows afloat the flyash of burner hearth bottom to suspended state, and negative-pressure air-flow is by flyash band in burner hearth
To the flow at burner hearth rear portion, will be collected in the bag filter of the dust stratification at other positions of boiler together band to boiler tail.
The flyash that industrial coal powder boiler produces is the good raw materials for production of building materials enterprise, the flyash that pulverized-coal fired boiler produces
It can focus on and apply, not only without secondary dirt into Hui Ta through the dispatch of closed system Geldart-D particle after being collected by bag filter
Dye, and construct good Mode of Circular.
In addition to the implementation, it is all to use equivalent transformation or equivalent replacement present invention additionally comprises there is other embodiment
The technical solution that mode is formed, should all fall within the scope of the hereto appended claims.
Claims (6)
- A kind of 1. Pulverized Coal fired Boiler Furnace soot blower, it is characterised in that：It includes boiler（13）, the boiler（13）Head is set There is burner（14）, the burner（14）On be provided with wind inlet three times（1）, the boiler（13）Afterbody passes through flue gas pipeline （10）It is sequentially connected and is provided with deduster（7）, air-introduced machine（8）And chimney（9）, the air-introduced machine（8）With chimney（9）Between cigarette Air pipe（10）On pass through connecting line（15）Access wind turbine three times（11）, the wind turbine three times（11）Air outlet connect tertiary air Main pipe（12）, the boiler（13）Burner hearth in the left and right sides be respectively arranged with burner hearth tertiary air main pipe（2）With soot blowing manifold （6）, the burner hearth tertiary air main pipe（2）With soot blowing manifold（6）Vertical burner hearth cross-wise direction arrangement, the tertiary air main pipe（12） It is divided into two-way, accesses burner hearth tertiary air main pipe all the way（2）, another way access burner（14）Wind inlet three times（1）, the stove Thorax tertiary air main pipe（2）It is above horizontally disposed to there is burner hearth tertiary air to be in charge of（3）, the soot blowing manifold（6）On along level side To being provided with soot blower for boiler hearth（4）；The soot blower for boiler hearth（4）Including burner hearth soot blowing main pipe（4.1）, the burner hearth soot blowing main pipe（4.1）Cloth in the horizontal direction Put, the burner hearth soot blowing main pipe（4.1）On be provided with burner hearth soot blowing jet pipe（4.2）, the burner hearth tertiary air is in charge of（3）Upper setting There is burner hearth tertiary air branch pipe（3.1）, the burner hearth tertiary air branch pipe（3.1）It is set in burner hearth soot blowing jet pipe（4.2）Outside.
- A kind of 2. Pulverized Coal fired Boiler Furnace soot blower according to claim 1, it is characterised in that：The burner hearth soot blowing jet pipe （4.2）It is interrupted soot blowing, the burner hearth tertiary air branch pipe into burner hearth（3.1）Continue to be sent into tertiary air into burner hearth.
- A kind of 3. Pulverized Coal fired Boiler Furnace soot blower according to claim 1, it is characterised in that：The burner hearth tertiary air branch Pipe（3.1）With burner hearth soot blowing jet pipe（4.2）Top is provided with circular tube cover（4.3）, the circle tube cover（4.3）Diameter with Burner hearth tertiary air branch pipe（3.1）Diameter is identical, the burner hearth tertiary air branch pipe（3.1）With burner hearth soot blowing jet pipe（4.2）One side Or bilateral offers square spray orifice, the square spray orifice is located at circular tube cover（4.3）Downside, the burner hearth soot blowing jet pipe （4.2）On square spray orifice be less than burner hearth tertiary air branch pipe（3.1）On square spray orifice.
- A kind of 4. Pulverized Coal fired Boiler Furnace soot blower according to claim 1, it is characterised in that：The burner hearth tertiary air is female Pipe（2）, soot blowing manifold（6）, soot blower for boiler hearth（4）Between be connected to corresponding control valve respectively.
- A kind of 5. Pulverized Coal fired Boiler Furnace soot blower according to claim 1, it is characterised in that：The burner hearth tertiary air branch Pipe（3.1）Perforate among from burner hearth membrane wall band steel, with band steel sealing welding.
- A kind of 6. Pulverized Coal fired Boiler Furnace soot blower according to claim 1, it is characterised in that：The burner hearth tertiary air branch Pipe（3.1）With burner hearth soot blowing jet pipe（4.2）It is stainless steel positioned at burner hearth interior section, is carbon steel material outside burner hearth Matter.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610744432.2A CN106196114B (en) | 2016-08-29 | 2016-08-29 | A kind of Pulverized Coal fired Boiler Furnace soot blower |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610744432.2A CN106196114B (en) | 2016-08-29 | 2016-08-29 | A kind of Pulverized Coal fired Boiler Furnace soot blower |
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| CN106196114A CN106196114A (en) | 2016-12-07 |
| CN106196114B true CN106196114B (en) | 2018-05-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610744432.2A Active CN106196114B (en) | 2016-08-29 | 2016-08-29 | A kind of Pulverized Coal fired Boiler Furnace soot blower |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6164956A (en) * | 1997-02-11 | 2000-12-26 | Ge Energy & Environmental Research Corporation | System and method for removing ash deposits in a combustion device |
| US7261046B1 (en) * | 2003-06-10 | 2007-08-28 | Aptech Engineering Services, Inc. | System and method of reducing pulverizer flammability hazard and boiler nitrous oxide output |
| CN202938321U (en) * | 2012-12-03 | 2013-05-15 | 唐山市金沙工贸有限公司 | Soot blower system of pulverized coal fired boiler |
| CN203571724U (en) * | 2013-12-10 | 2014-04-30 | 辽宁调兵山煤矸石发电有限责任公司 | 300MW CFB (circulating fluidized bed) boiler tail heated surface steam ash blowing device |
| CN105864748A (en) * | 2016-04-19 | 2016-08-17 | 上海理工大学 | Combined combustion system of chain boiler |
| CN206145692U (en) * | 2016-08-29 | 2017-05-03 | 江苏双良锅炉有限公司 | Pulverized coal boiler furnace soot blower |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6883443B2 (en) * | 2002-09-09 | 2005-04-26 | Aptech Engineering Services, Inc. | Method for reduction of slagging and fouling of the waterwalls and of the firebox and superheater and reheater of steam boilers with coal combustion |
| WO2012042892A1 (en) * | 2010-09-29 | 2012-04-05 | バブコック日立株式会社 | Oxygen combustion system and method for operating same |
-
2016
- 2016-08-29 CN CN201610744432.2A patent/CN106196114B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6164956A (en) * | 1997-02-11 | 2000-12-26 | Ge Energy & Environmental Research Corporation | System and method for removing ash deposits in a combustion device |
| US7261046B1 (en) * | 2003-06-10 | 2007-08-28 | Aptech Engineering Services, Inc. | System and method of reducing pulverizer flammability hazard and boiler nitrous oxide output |
| CN202938321U (en) * | 2012-12-03 | 2013-05-15 | 唐山市金沙工贸有限公司 | Soot blower system of pulverized coal fired boiler |
| CN203571724U (en) * | 2013-12-10 | 2014-04-30 | 辽宁调兵山煤矸石发电有限责任公司 | 300MW CFB (circulating fluidized bed) boiler tail heated surface steam ash blowing device |
| CN105864748A (en) * | 2016-04-19 | 2016-08-17 | 上海理工大学 | Combined combustion system of chain boiler |
| CN206145692U (en) * | 2016-08-29 | 2017-05-03 | 江苏双良锅炉有限公司 | Pulverized coal boiler furnace soot blower |
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| CN106196114A (en) | 2016-12-07 |
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