CN105841179B - The stove cigarette mixed method of lignite-fired plant boiler - Google Patents
The stove cigarette mixed method of lignite-fired plant boiler Download PDFInfo
- Publication number
- CN105841179B CN105841179B CN201610240381.XA CN201610240381A CN105841179B CN 105841179 B CN105841179 B CN 105841179B CN 201610240381 A CN201610240381 A CN 201610240381A CN 105841179 B CN105841179 B CN 105841179B
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- mixing chamber
- tube body
- wall
- boiler
- smoking mouth
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Classifications
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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
-
- 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
- F23L15/00—Heating of air supplied for combustion
-
- 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
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
Abstract
A kind of stove cigarette mixed method of lignite-fired plant boiler, including the horizontal introducing high-temperature flue gas from boiler furnace smoking mouth to mixing chamber, cryogenic media is introduced by swirling inlet mode to the mixing chamber；Cooling water is passed through to the mixing chamber interior walls, adjusts stove smoke temperature degree in mixing chamber；The mixing chamber includes the smoking mouth tube body connected horizontally with the boiler furnace, the tube body is evenly distributed with the circumferential direction for connecting the smoking mouth side multiple is used for tangential admission to form the air inlet of eddy flow, the tube body is circumferentially surround by multiple steel pipes and is continuously formed by welding by fin, there is inner thermal insulating layer and external thermal insulation respectively on its inner wall and outer wall, there is wearing layer on the inner wall of the inner thermal insulating layer, galvanized iron sheet is surrounded by outside the external thermal insulation.The method of the present invention fundamentally solves boiler using brown coal mixing chamber and the recurrent coking problem of smoking mouth, eliminates the outstanding problem for influencing blower mill pulverized coal preparation system boiler using brown coal safe and stable operation.
Description
Technical field
The present invention relates to boiler and high-temperature furnace smoke pipeline technical field, more particularly to a kind of stove cigarette of lignite-fired plant boiler
Mixed method.
Background technology
Because lignite moisture is difficult to greatly the characteristics of dry, volatile matter is high, and easily generation spontaneous combustion is exploded, lignite-fired plant boiler is big
It is more direct-firing using three media (high-temperature flue gas, low-temperature furnace smoke and hot wind) or second medium (high-temperature flue gas and hot wind) drying fan mill
Pulverized coal preparation system.High-temperature flue gas is extracted from the position that boiler furnace top smoke temperature is about 1100 DEG C or so, and smoke temperature is about 130 DEG C of low temperature
After stove cigarette is drawn from boiler dust remover, a part of hot wind from air preheater outlet is with low-temperature furnace smoke via respective pipeline in stove
After being mixed above thorax smoking mouth by bifurcated pipe, the high-temperature furnace smoke pipeline horizontal segment close to smoking mouth is sent into as cryogenic media,
It is mixed in a certain ratio with the high-temperature flue gas horizontally entered into, so that pulverized coal preparation system drier reaches the temperature of requirement and oxygen-containing
Amount, meets that coal dust stablizes the required coal dust moisture of burning and primary air ratio requirement in boiler.Traditionally, by this section near smoking mouth
Realize that the high-temperature furnace smoke pipeline of hot and cold gas medium mixing is known as mixing chamber.Mixing chamber generally uses outer lining steel plate, built-in fire resisting
The mode of material.The drier of mixing chamber outlet is sent into coal pulverizer by high-temperature furnace smoke pipeline.
Lignite ash melting temperature is generally relatively low, belongs to easy coking coal.To enable furnace high-temperature flue gas suitable by blower mill
Profit extraction, smoking mouth are typically located near burner hearth exhanst gas outlet, and smoke temperature level is higher herein.At smoking mouth, furnace high-temperature
Flue gas rapidly switchs to bottom horizontal flow sheet (referring to Fig. 4) by flowing to be folded to longitudinally upward, causes high-temperature flue gas directly to wash away smoking pipeline
Wall so that adsorbed in the lime-ash of molten condition, condense on pipeline wall and form coking, and coking makes once occurring
Obtaining pipe surface becomes more coarse, and the lime-ash adsorbed is also more and more, is finally formed in smoking mouth and mixing chamber a large amount of
Coking.Smoking mouth and mixing chamber coking can block drier circulation area, cause pulverizer capacity to reduce, correspondingly boiler load
Reduce, generating set is contributed and is limited.Smoking mouth can occur when serious to be blocked by Jiao, coal pulverizer is forced to stop, and unit is forced blowing out
The accident of shutdown.Further, since uneven in temperature excessive at inner-walls of duct, the drawing crack phenomenon of mixing chamber pipeline section is also very common.Pipe
Drawing crack causes environment cold wind to leak into high-temperature furnace smoke pipeline, seriously affects the effect of coal pulverizer extracting high-temperature stove cigarette.From current state
From the point of view of the situation of the inside and outside large-scale lignite-fired plant boiler to put into operation, mixing chamber and the easy coking of smoking mouth generally existing and easy drawing crack are asked
Topic, safe and stable operation and normal on-load to generating set are caused and significantly affected.
To overcome the adverse effect of smoking mouth and mixing chamber coking to boiler using brown coal normal operation, existing measure is mixed
Set manhole periodically to carry out manpower in conjunction room downstream line and beat Jiao, this mode had both consumed a large amount of manpower and materials, also not from root
Mixing chamber coking problem is solved in sheet.A kind of disclosed scheme proposes multiple spot and introduces hot wind, hot wind introduction point by prolonging recently
The technical solution of the water screen tube cooling of stretching, but this scheme does not improve at smoking mouth and mixing chamber internal face fundamentally
The problem of smoke temperature is uneven, mixing chamber is interior to still have localized high temperature regions, thus smoking mouth and mixing chamber coking problem and drawing crack
Problem presence as the same；And this scheme make it that the processing and manufacturing of smoking mouth region domain water screen tube and installation are complex.As it can be seen that
The existing measure coking problem not yet in effect for solving boiler using brown coal smoking mouth and mixing chamber, and mixing chamber pipeline section because it is cold and hot not
Drawing crack problem caused by.
The content of the invention
Based on this, for above-mentioned technical problem, there is provided a kind of stove cigarette mixed method of lignite-fired plant boiler.
In order to solve the above technical problems, the present invention adopts the following technical scheme that：
A kind of stove cigarette mixed method of lignite-fired plant boiler, including：
It is horizontal from boiler furnace smoking mouth to mixing chamber to introduce high-temperature flue gas, by swirling inlet mode to the mixing chamber
Cryogenic media is introduced, to form the low temperature air film for being used for wrapping up the high-temperature flue gas in mixing chamber and smoking mouth near-wall region；
Cooling water is passed through to the mixing chamber interior walls, adjusts stove smoke temperature degree in mixing chamber；
The mixing chamber includes the smoking mouth tube body connected horizontally with the boiler furnace, and the tube body is described in connection
The circumferential direction of smoking mouth side is evenly distributed with multiple tangential admissions that are used for form the air inlet of eddy flow, and the tube body is used for by multiple
The steel pipe for being passed through cooling water circumferentially surround and is continuously formed by welding by fin, has interior guarantor on its inner wall and outer wall respectively
Warm layer and external thermal insulation, have wearing layer on the inner wall of the inner thermal insulating layer, galvanized iron sheet are surrounded by outside the external thermal insulation.
The method of the present invention introduces cryogenic media by way of swirling inlet to mixing chamber, and in mixing chamber and smoking mouth is near
Wall region forms stable low temperature air film, for wrapping up the horizontal high-temperature flue gas introduced from boiler furnace smoking mouth to mixing chamber,
Avoid high-temperature flue gas from directly washing away wall and form coking, so that fundamentally solution boiler using brown coal mixing chamber and smoking mouth are often sent out
Raw coking problem, meanwhile, the mode of swirling inlet also makes mixing chamber wall surface temperature relatively low and more uniformly, eliminates influence wind
Fan the outstanding problem of mill coal pulverizer system boiler using brown coal safe and stable operation.
Brief description of the drawings
The present invention is described in detail with reference to the accompanying drawings and detailed description：
Fig. 1 is the structure diagram of the mixing chamber of the present invention；
Fig. 2 is the mixing chamber of the present invention and the connection diagram of boiler furnace；
Fig. 3 is the radial section structure diagram of the tube body of the present invention；
Fig. 4 is the mixing chamber flow of flue gas and Characteristics of The Distribution of Temperature schematic diagram of existing mixed method；
Fig. 5 is the mixing chamber flow of flue gas and Characteristics of The Distribution of Temperature schematic diagram of the method for the present invention.
Embodiment
As shown in Figure 1 and Figure 2, the stove cigarette mixed method of a kind of lignite-fired plant boiler, including：
It is horizontal from 2 smoking mouth of boiler furnace to mixing chamber 1000 to introduce high-temperature flue gas, by swirling inlet mode to mixing
Room 1000 introduces cryogenic media, to form the low temperature gas for being used for wrapping up high-temperature flue gas in mixing chamber 1000 and smoking mouth near-wall region
Film.
Cryogenic media is hot wind, or low-temperature furnace smoke and hot wind.
Meanwhile cooling water is passed through to 1000 inner wall of mixing chamber, 1000 inner wall of mixing chamber is cooled down, so as to play adjusting
The effect of stove smoke temperature degree in mixing chamber 1000, ensures the wall surface temperature of mixing chamber.
Wherein, mixing chamber 1000 includes the smoking mouth tube body 1100 connected horizontally with boiler furnace 2, and tube body 1100 is even
The circumferential direction for connecing smoking mouth side is evenly distributed with multiple tangential admissions that are used for form the air inlet 1110 of eddy flow.
As shown in figure 3, tube body 1100 is circumferentially surround by multiple steel pipes 1130 for being passed through cooling water and passes through fin
1140 are continuously formed by welding.
There is inner thermal insulating layer 1150 on the inner wall of tube body 1100, the caloric receptivity of cooling water can be reduced, in tube body 1100
Stove cigarette play insulation effect, inner thermal insulating layer 1150 uses aluminosilicate refractory fiber material.
There is wearing layer 1160, for reducing high temperature, high-speed oven cigarette to inner thermal insulating layer on the inner wall of inner thermal insulating layer 1150
Washing away and corroding for 1150 inner walls, so as to play the role of protective conduit, extends the service life of pipeline, wearing layer 1160 uses
Moldable material.
There is external thermal insulation 1170 on the outer wall of tube body 1100, can play and cooling water is kept the temperature, prevent cooling water
The effect of interior heat loss, recycles the cooling water for having certain temperature so as to realize, reaches the effect of energy-saving and emission-reduction
Fruit, external thermal insulation 1170 use rock wool material.
Galvanized iron sheet 1180 is surrounded by outside external thermal insulation 1170, external thermal insulation can be fixed and be protected, is made with extending
Use the service life.
The method of the present invention introduces cryogenic media by way of swirling inlet to mixing chamber 1000, in the mixing chamber 1000 and
Smoking mouth near-wall region forms stable low temperature air film, draws for wrapping up from 2 smoking mouth of boiler furnace to 1000 level of mixing chamber
The high-temperature flue gas entered, avoids high-temperature flue gas from directly washing away wall and forms coking, referring to Fig. 5, so as to fundamentally solve lignite pot
Stove mixing chamber and the recurrent coking problem of smoking mouth, meanwhile, the mode of swirling inlet also makes mixing chamber wall surface temperature relatively low
And more uniformly, eliminate the outstanding problem for influencing blower mill pulverized coal preparation system boiler using brown coal safe and stable operation.
Wherein, tube body 1100 at air inlet 1110 formed with wind scooper 1120, to ensure swirling inlet, wind scooper 1120
With the top plate 1121 tangent with the outer wall of tube body 1100 and two block side plate 1122 connected vertically with tube wall.
But those of ordinary skill in the art is it should be appreciated that the embodiment of the above is intended merely to explanation originally
Invention, and be not used as limitation of the invention, as long as in the spirit of the present invention, to embodiment described above
Change, modification will all fall in the range of claims of the present invention.
Claims (2)
- A kind of 1. stove cigarette mixed method of lignite-fired plant boiler, it is characterised in that including：It is horizontal from boiler furnace smoking mouth to mixing chamber to introduce high-temperature flue gas, introduced by swirling inlet mode to the mixing chamber Cryogenic media, to form the low temperature air film for being used for wrapping up the high-temperature flue gas in mixing chamber and smoking mouth near-wall region；Cooling water is passed through to the mixing chamber interior walls, adjusts stove smoke temperature degree in mixing chamber；The mixing chamber includes the smoking mouth tube body connected horizontally with the boiler furnace, and the tube body is connecting the smoking The circumferential direction of mouthful side be evenly distributed with it is multiple be used for tangential admission to form the air inlet of eddy flow, the tube body is used to be passed through by multiple The steel pipe of cooling water circumferentially surround and is continuously formed by welding by fin, has inner thermal insulating layer on its inner wall and outer wall respectively And external thermal insulation, there is on the inner wall of the inner thermal insulating layer wearing layer, galvanized iron sheet, the tube body are surrounded by outside the external thermal insulation There is the top plate and and tube body tangent with the outer wall of the tube body formed with wind scooper, the wind scooper at the air inlet Two blocks of side plates of outer wall vertical connection.
- A kind of 2. stove cigarette mixed method of lignite-fired plant boiler according to claim 1, it is characterised in that the interior guarantor Warm layer uses aluminosilicate refractory fiber material, and the wearing layer uses moldable material, and the external thermal insulation uses rock wool.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610240381.XA CN105841179B (en) | 2016-04-18 | 2016-04-18 | The stove cigarette mixed method of lignite-fired plant boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610240381.XA CN105841179B (en) | 2016-04-18 | 2016-04-18 | The stove cigarette mixed method of lignite-fired plant boiler |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105841179A CN105841179A (en) | 2016-08-10 |
| CN105841179B true CN105841179B (en) | 2018-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610240381.XA Active CN105841179B (en) | 2016-04-18 | 2016-04-18 | The stove cigarette mixed method of lignite-fired plant boiler |
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Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113418203B (en) * | 2021-07-01 | 2022-05-31 | 上海机易电站设备有限公司 | Membrane type inner-cooling high-temperature furnace smoke pipeline and manufacturing method |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7381378B2 (en) * | 2005-03-09 | 2008-06-03 | Mcwhorter Edward Milton | Coal flue gas scrubber |
| CN100485166C (en) * | 2007-04-30 | 2009-05-06 | 西安交通大学 | Grooving gaseous film cooling hole |
| CN102654292B (en) * | 2011-08-16 | 2014-07-09 | 刘瑛 | Environmentally-friendly circulating-type smoke exhauster |
| CN203940453U (en) * | 2014-07-08 | 2014-11-12 | 上海援梦电力能源科技咨询中心 | Quenching flue gas mixing-chamber device |
| CN205065769U (en) * | 2015-10-15 | 2016-03-02 | 绵阳市鑫科源环保科技有限公司 | Flue gas quench tower structure |
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- 2016-04-18 CN CN201610240381.XA patent/CN105841179B/en active Active
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| CN105841179A (en) | 2016-08-10 |
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Effective date of registration: 20220913 Address after: 200437 No. 287, Renmin Road, Chengqiao Town, Chongming District, Shanghai Patentee after: SHANGHAI JIYI POWER STATION EQUIPMENT CO.,LTD. Address before: Room 416, Building 7, No. 68, Dongheyan, Chengqiao Town, Chongming County, Shanghai, 202150 Patentee before: SHANGHAI YUANMENG ELECTRIC POWER SCIENCE & TECHNOLOGY CONSULTING CENTER |
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