CN106016315A - Boiler system capable of preventing coking - Google Patents
Boiler system capable of preventing coking Download PDFInfo
- Publication number
- CN106016315A CN106016315A CN201610305518.5A CN201610305518A CN106016315A CN 106016315 A CN106016315 A CN 106016315A CN 201610305518 A CN201610305518 A CN 201610305518A CN 106016315 A CN106016315 A CN 106016315A
- Authority
- CN
- China
- Prior art keywords
- air
- outlet
- heat exchanger
- flue
- feeder
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23J—REMOVAL OR TREATMENT OF COMBUSTION PRODUCTS OR COMBUSTION RESIDUES; FLUES
- F23J11/00—Devices for conducting smoke or fumes, e.g. flues
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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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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L13/00—Construction of valves or dampers for controlling air supply or draught
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L5/00—Blast-producing apparatus before the fire
- F23L5/02—Arrangements of fans or blowers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23L—SUPPLYING AIR OR NON-COMBUSTIBLE LIQUIDS OR GASES TO COMBUSTION APPARATUS IN GENERAL ; VALVES OR DAMPERS SPECIALLY ADAPTED FOR CONTROLLING AIR SUPPLY OR DRAUGHT IN COMBUSTION APPARATUS; INDUCING DRAUGHT IN COMBUSTION APPARATUS; TOPS FOR CHIMNEYS OR VENTILATING SHAFTS; TERMINALS FOR FLUES
- F23L9/00—Passages or apertures for delivering secondary air for completing combustion of fuel
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
Abstract
The invention provides a boiler system capable of preventing coking. The boiler system comprises a hearth, a flue, a primary air port, a secondary air port, a feeder, an air feeder and an induced draft fan and further comprises an air inlet, a heat exchanger and an auxiliary fan. An air heat exchanger is arranged in the flue. Outlets of the air feeder comprise the primary air outlet and the secondary air outlet. The primary air outlet is connected with an inlet of the feeder. An outlet of the feeder is connected with the primary air port. An outlet of the secondary air port is provided with a top burner. The secondary air outlet is connected with the secondary air port formed in the top of the hearth. The air inlet is formed in the hearth. An outlet of the auxiliary fan is connected with an inlet of the heat exchanger. An outlet of the heat exchanger is connected with the air inlet. A sub-line is arranged between the auxiliary fan and the air inlet. The boiler system has the beneficial effects that the air feeder supplies primary air and secondary air simultaneously, the overall energy consumption of the system is reduced, the auxiliary fan assists in adjusting the temperature of the hearth, severe coking of the hearth and the flue is avoided, the heat exchanger is arranged in the flue, the system heat is recycled, the temperature of a smoke outlet is reduced, hearth coking is prevented, and the boiler safety is improved.
Description
Technical field
The present invention relates to a kind of Coal Chemical Industry system, particularly relate to the pot of a kind of slagging prevention being applied to Coal Chemical Industry
Furnace system.
Background technology
Coking is problem commonplace in boiler operatiopn, generally, and the ash moved together along with flue gas
Solid impurity particle, is cooled with flue gas together due to the heat absorption of furnace wall cooling surface, if the slag particle of liquid
Before water-cooling wall or furnace wall, solidify because temperature reduces, when being attached on heating surface tube wall,
By forming one layer of loose grieshoch, operation is easy to remove by soot blowing.When in burner hearth, temperature is higher,
A part of ash particle has reached melted or semi-molten state, if this part ash particle before reaching heating surface not
Enough cooled down and reached curdled appearance, be there is higher cementitiousness, be easy for sticking to by sweep of gases
On heating surface or furnace wall, even up to molten state, adhere to the melted or ash particle of semi-molten state and unburned
Most coke makes coking development.In combustion, contained in pulverized coal particle meltable or easy gasification
Material volatilizees rapidly, becomes gaseous state to enter in flue gas, condenses when the temperature decreases, or stick to sweep of gases
Heating surface or furnace wall on, or condense in fly ash granule surface, become melted alkali compound film, then glue
Being attached on heating surface form initial coking layer, the temperature of burner region is the highest, and flying dust the most easily reaches soft
Change state or molten condition, the probability producing coking is the biggest, and volatile gasification substance in coal dust
The strongest.Coking can increase heat exchange thermal resistance, reduces the heat exchange efficiency of heat-transfer surface so that burner hearth is exerted oneself significantly
Reduce, time serious, cause blowing out；The heat exchange efficiency decline that slagging scorification coking causes can cause exhaust gas temperature liter
High；Alkali metal can form complex with ferrum phase element, forms metal pipe-wall and gnaws the effect of biting so that metal is subject to
The compressive resistance of hot side reduces, and easily causes high temperature corrosion and booster, has a strong impact on the stability that equipment runs
And reliability.In sum, heating surface coking drastically influence the safe and economical operation of boiler.Coking
Factor is the most complicated, and the most basic principle of slagging prevention is the primary condition eliminating and producing coking.If in burner hearth
High-temperature flue gas not flush water cold wall, or when before air flow contacts pipe, melted soot particle has cooled down in solidification
State or no adhesion, near water-cooling wall, creation oxygen atmosphere is to improve ash fusion point temperature, and coking just will not be produced
Raw, therefore prevent the coking of burner hearth middle and lower part, mainly improve air force condition and start with, prevent upper furnace from tying
Burnt mainly by reducing flue-gas temperature.
Summary of the invention
Therefore for the situation of existing boiler-burner district water-cooling wall coking, the present invention proposes one and prevents knot
Burnt steam generator system.
The technical scheme is that and be achieved in that: the steam generator system of a kind of slagging prevention, including burner hearth,
With flue, the primary air nozzle being located on burner hearth of burner hearth connection, be located at the overfiren air port of roof of the furnace, be connected
The feeder of primary air nozzle, connect the pressure fan of feeder, connect the air-introduced machine of flue outlet, also include into
Air port, heat exchanger, auxiliary blower fan；Air heat exchanger it is provided with, the outlet bag of described pressure fan in described flue
Including First air outlet and secondary wind exports, the outlet of described First air connects feeder air inlet, described feeder
Outlet connects primary air nozzle, and the outlet of described overfiren air port is provided with some tops burner, and the outlet of described secondary wind is even
Connecing overfiren air port, a pressure fan is blown to primary air nozzle and overfiren air port simultaneously, reduces energy consumption；Described
Air inlet is located on burner hearth, and auxiliary fan outlet connects heat exchanger import, and heat exchanger exit connects air inlet, institute
Stating and be provided with by-pass between auxiliary blower fan and air inlet, described by-pass one end connects auxiliary fan outlet, and the other end connects
Air inlet, auxiliary blower fan send cold wind in burner hearth, reduces fire box temperature.
Further, described flue includes the front convection section being vertically arranged, rear convection section and is located at front convection current
Advection section between section, rear convection section, described front convection section connects furnace outlet, described air heat-exchange
Advection section is located at by device.Three sections of convection sections are set, extend flue length, arrange in flue for the later stage and change
Hot device provides space, it is possible to preferably reclaims heat, and reduces exit gas temperature.
Yet further, between the outlet of described secondary wind and overfiren air port, pipeline is provided with secondary air adjustor valve,
Described by-pass pipeline is provided with secondary line control valve.By regulation valve according to practical condition, hearth combustion feelings
Condition, fire box temperature adjust air quantity, more in time, more accurate.
By above disclosure, the invention have the benefit that pressure fan is supplied simultaneously to First air, secondary
Wind, reduces system entirety energy consumption, auxiliary blower fan auxiliary adjustment fire box temperature, it is to avoid burner hearth, flue occur tight
Heavily coking, improves boiler safety, sets heat exchanger in flue, has reclaimed system thermal, reduces flue gas and goes out
Mouth temperature, prevents burner hearth coking.
Accompanying drawing explanation
Fig. 1 is the structural representation of the present invention.
Reference is expressed as follows:
1 burner hearth, 101 top burners, 2 feeders, 3 pressure fan, 301 First air outlets, 302 secondary wind
Outlet, 303 secondary air adjustor valves, 4 flues, convection section after 401, convection section before 402,403 advections
Section, 5 air-introduced machines, 6 primary air nozzles, 7 air heat exchangers, 8 chimneys, 9 overfiren air ports, 10 air inlets, 11
Heat exchanger, 12 auxiliary blower fans, 13 by-passes, 14 secondary line control valves.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clearly
Chu, be fully described by, it is clear that described embodiment be only a part of embodiment of the present invention rather than
Whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not making creation
The every other embodiment obtained under property work premise, broadly falls into the scope of protection of the invention.
As it is shown in figure 1, the steam generator system of slagging prevention, the flue 4 that connects with burner hearth 1 including burner hearth 1, set
Primary air nozzle 9 on burner hearth, be located at burner hearth 1 top overfiren air port 6, connect primary air nozzle 9 feeder 2,
Connect the pressure fan 3 of feeder 2, connect the air-introduced machine 5 of flue 4 outlet, also include air inlet 10, heat exchanger
11, auxiliary blower fan 12.
Described flue 4 includes the front convection section 402 being vertically arranged, rear convection section 401 and is located at front convection section
402, the advection section 403 between rear convection section 401, described front convection section 402 connects burner hearth 1 and exports, if
Put three sections of convection sections, extend flue 4 length, provide space for arranging heat exchanger in flue 4, it is possible to preferably
Reclaim heat, and reduce exit gas temperature, in described advection section 403, set air heat exchanger 7, reclaim
Flue 4 heat, reduces flue 4 outlet temperature, and the outlet of described pressure fan 3 includes First air outlet 301 and two
Secondary wind outlet 302, a Fans send First air, secondary wind simultaneously, has deducted traditional overfire air fan, reduces
Energy consumption, described First air outlet 301 connection feeder 2 air inlets, the outlet of described feeder 2 connects First air
Mouth 6, makes coal dust pass through primary air piping and sends into burner hearth 1, and the outlet of described overfiren air port 9 is provided with some tops burner
101, coal dust in burner hearth 1 to be heated, described secondary wind outlet 302 is connected at burner hearth 1 by secondary air channel and pushes up
The overfiren air port 6 in portion, secondary wind is burning offer oxygen, and can add the disturbance of air blast, promotes high-temperature flue gas
Backflow, promote the mixing of combustible and oxygen, for offer condition of burning completely.Described secondary wind outlet 302
And the pipeline between overfiren air port 9 is provided with secondary air adjustor valve 303, regulate two by secondary air adjustor valve 303
Secondary wind proportioning, can control fire box temperature further.
Described air inlet 10 is located on burner hearth 1, and the outlet of auxiliary blower fan 12 connects heat exchanger 11 import, and heat exchanger 11 goes out
Mouth connects air inlet 10, is provided with by-pass 13, described by-pass 13 one end between described auxiliary blower fan 12 and air inlet 10
Connecting auxiliary blower fan 12 to export, the other end connects air inlet 10, and by-pass 13 pipeline is provided with secondary line control valve 14.
Air inlet 10 is different from overfiren air port 9 position, but is all located at burner hearth middle and lower part, and auxiliary blower fan 12 power consumption is less than tradition
Overfire air fan, carries out main line, by-pass adjustment by the opening and closing of secondary line control valve 14, when secondary line control valve 12 is complete
Guan Shi, auxiliary the sent air of blower fan 12 all enters burner hearth 1 after heat exchanger 11 heat exchange reduces temperature and mixes, when
When burner hearth 1 temperature is inadequate, can suitably open the secondary line control valve 14 on by-pass 13, make the heat exchange of entrance burner hearth 1
Air capacity reduces, according to temperature, and can be by the secondary fully open temperature control of line control valve 14.
The operation principle of the present invention: prevent the coking of burner hearth middle and lower part, mainly starts with from improving air force condition,
Prevent upper furnace coking, mainly by reducing flue-gas temperature.In burner hearth 1 middle and lower part, auxiliary blower fan 12 is set, logical
Cross feeding burner hearth 1 after gas temperature is reduced by heat exchanger to lower the temperature, control burner hearth 1 temperature, coordinate in flue 4
Heat exchanger is set, reduces flue-gas temperature, thus avoid burner hearth 1 top coking: three air port air intakes, make stove
In thorax 1, multifuel combustion is more thorough, thus avoids burner hearth 1 middle and lower part coking.
Finally illustrate, above example only in order to technical scheme to be described and unrestricted, although
With reference to preferred embodiment, the present invention is described in detail, it will be understood by those within the art that,
Technical scheme can be modified or equivalent, without deviating from technical solution of the present invention
Objective and scope, it all should be contained in the middle of scope of the presently claimed invention.
Claims (3)
1. a steam generator system for slagging prevention, the flue (4) connected with burner hearth (1) including burner hearth (1),
The primary air nozzle (9) being located on burner hearth, the overfiren air port (6) being located at burner hearth (1) top, connection are once
The feeder (2) in air port (9), the pressure fan (3) of connection feeder (2), connection flue (4) go out
The air-introduced machine (5) of mouth, it is characterised in that: also include air inlet (10), heat exchanger (11), auxiliary blower fan
(12)；
Being provided with air heat exchanger (7) in described flue (4), the outlet of described pressure fan (3) includes one
Secondary wind outlet (301) and secondary wind outlet (302), described First air outlet (301) connects feeder (2)
Import, described feeder (2) outlet connects primary air nozzle (9), and described overfiren air port (6) outlet is provided with
Some tops burner (101), described secondary wind outlet (302) connecting secondary air port (6)；
Described air inlet (10) is located on burner hearth (1), and auxiliary blower fan (12) outlet connects heat exchanger (11)
Import, heat exchanger (11) outlet connects air inlet (10), described auxiliary blower fan (12) and air inlet (10)
Between be provided with by-pass (13), described by-pass (13) one end connects auxiliary blower fan (12) outlet, and the other end is even
Tap into air port (10).
The steam generator system of a kind of slagging prevention the most as claimed in claim 1, it is characterised in that: described flue
(4) include the front convection section (402) being vertically arranged, rear convection section (401) and be located at front convection section (402),
Advection section (403) between rear convection section (401), described front convection section (402) connects burner hearth (1)
Outlet, described air heat exchanger (7) is located at advection section (403).
The steam generator system of a kind of slagging prevention the most as claimed in claim 1, it is characterised in that: described secondary
Between wind outlet (302) and overfiren air port (9), pipeline is provided with secondary air adjustor valve (303), described pair
Line (13) pipeline is provided with secondary line control valve (14).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610305518.5A CN106016315A (en) | 2016-05-10 | 2016-05-10 | Boiler system capable of preventing coking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610305518.5A CN106016315A (en) | 2016-05-10 | 2016-05-10 | Boiler system capable of preventing coking |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106016315A true CN106016315A (en) | 2016-10-12 |
Family
ID=57099801
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610305518.5A Pending CN106016315A (en) | 2016-05-10 | 2016-05-10 | Boiler system capable of preventing coking |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106016315A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07280251A (en) * | 1994-04-01 | 1995-10-27 | Matsushita Electric Ind Co Ltd | Combustion apparatus |
| CN101408308A (en) * | 2008-11-24 | 2009-04-15 | 宁波怡诺能源科技有限公司 | Coal-burning boiler |
| CN202141027U (en) * | 2011-06-10 | 2012-02-08 | 邵阳市金鹰锅炉有限公司 | Environment-friendly energy-saving biomass hot pipe boiler |
| CN103644564A (en) * | 2013-11-26 | 2014-03-19 | 中国华能集团清洁能源技术研究院有限公司 | Temperature-adjustable and resistance-adjustable fluidized wind system of circulating fluidized bed boiler |
| CN104864392A (en) * | 2015-04-15 | 2015-08-26 | 同济大学 | Total-oxygen coal powder MILD combustion method and device used by same |
| CN204717692U (en) * | 2015-06-24 | 2015-10-21 | 天津机电进出口有限公司 | A kind of palm waste boiler smoke circulating combustion system |
| CN105135422A (en) * | 2015-08-15 | 2015-12-09 | 湖南博茂节能环保科技有限公司 | Mixed-combustion boiler of biomass briquette fuels and tobacco stems, and pollutant control method of mixed-combustion boiler |
| CN105351957A (en) * | 2015-12-14 | 2016-02-24 | 嘉兴华清能源科技有限公司 | Novel biomass particle combustion boiler system |
-
2016
- 2016-05-10 CN CN201610305518.5A patent/CN106016315A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07280251A (en) * | 1994-04-01 | 1995-10-27 | Matsushita Electric Ind Co Ltd | Combustion apparatus |
| CN101408308A (en) * | 2008-11-24 | 2009-04-15 | 宁波怡诺能源科技有限公司 | Coal-burning boiler |
| CN202141027U (en) * | 2011-06-10 | 2012-02-08 | 邵阳市金鹰锅炉有限公司 | Environment-friendly energy-saving biomass hot pipe boiler |
| CN103644564A (en) * | 2013-11-26 | 2014-03-19 | 中国华能集团清洁能源技术研究院有限公司 | Temperature-adjustable and resistance-adjustable fluidized wind system of circulating fluidized bed boiler |
| CN104864392A (en) * | 2015-04-15 | 2015-08-26 | 同济大学 | Total-oxygen coal powder MILD combustion method and device used by same |
| CN204717692U (en) * | 2015-06-24 | 2015-10-21 | 天津机电进出口有限公司 | A kind of palm waste boiler smoke circulating combustion system |
| CN105135422A (en) * | 2015-08-15 | 2015-12-09 | 湖南博茂节能环保科技有限公司 | Mixed-combustion boiler of biomass briquette fuels and tobacco stems, and pollutant control method of mixed-combustion boiler |
| CN105351957A (en) * | 2015-12-14 | 2016-02-24 | 嘉兴华清能源科技有限公司 | Novel biomass particle combustion boiler system |
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| C06 | Publication | ||
| PB01 | Publication | ||
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Application publication date: 20161012 |