CN201218516Y - Coal-fired pulverizing equipment for power station pulverized coal boiler - Google Patents
Coal-fired pulverizing equipment for power station pulverized coal boiler Download PDFInfo
- Publication number
- CN201218516Y CN201218516Y CNU2008201075842U CN200820107584U CN201218516Y CN 201218516 Y CN201218516 Y CN 201218516Y CN U2008201075842 U CNU2008201075842 U CN U2008201075842U CN 200820107584 U CN200820107584 U CN 200820107584U CN 201218516 Y CN201218516 Y CN 201218516Y
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- CN
- China
- Prior art keywords
- coal
- boiler
- hot air
- steam heater
- air
- 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.)
- Expired - Fee Related
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- 239000003245 coal Substances 0.000 title claims abstract description 60
- 238000010298 pulverizing process Methods 0.000 title claims abstract description 11
- 239000000843 powder Substances 0.000 claims description 10
- 239000000446 fuel Substances 0.000 claims description 8
- 238000004519 manufacturing process Methods 0.000 claims description 6
- 239000000295 fuel oil Substances 0.000 abstract description 5
- 238000000227 grinding Methods 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 239000002817 coal dust Substances 0.000 description 6
- 238000010438 heat treatment Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 6
- 238000002485 combustion reaction Methods 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003801 milling Methods 0.000 description 2
- 208000011580 syndromic disease Diseases 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 230000036651 mood Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000010792 warming Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Images
Classifications
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- 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
Abstract
The utility model relates to coal pulverizing equipment of a pulverized coal fired boiler in a power station, comprising a coal pulverizing device provided with at least coal pulverizers, a supply air duct for supplying hot air to the coal grinding machine, and a steam heater mounted in the coal pulverizing device. One steam heater is mounted on a front-wall hot air main pipe, and the front wall hot air main pipe at one side of the steam heater is connected with a side-wall hot air main pipe of the pulverized coal fired boiler and a group of coal pulverizers; and the front-wall hot air main pipe at the other side of the steam heater is connected with the other side-wall hot air main pipe of the pulverized coal fired boiler and the other group of coal pulverizers. The utility model has the advantages that hot air can be rapidly supplied to one or a plurality of coal pulverizers without waiting for a cooled boiler to heat so that the coal pulverizers start working to save a great amount of fuel oil generally needed by igniting the pulverized coal fired boiler. The two-side wall hot air main pipes are simultaneously started up when the pulverized coal fired boiler runs normally, and the steam is enabled to quit running by utilizing pressure balance, thereby the flow resistance is reduced, and the service life of the equipment is prolonged.
Description
Technical field
The utility model relates in a kind of coal-fired power station boiler cold start process, the cold wind heating improvement technology of burning fuel pulverizing plant.
Background technology
Existing thermal power generation unit generally all adopts the mode of coal dust burning, promptly utilize coal-fired fuel pulverizing plant just raw coal grind into the very little particle of diameter, and it is blown into the burning of burner hearth inner suspension by air.For making coal pulverizer can satisfy the requirement of boiler operatiopn, grind out all qualified coal dusts in aspect such as granularity, temperature and humidity, need coal pulverizer sent to reach purposes such as intensification, drying with hot-air.
General large-size thermal power plant utilizes fuel oil (diesel oil, heavy oil etc.) burning that boiler is heated earlier, and utilization is heated the waste heat of boiler thus, by connecting the air supply duct of boiler and coal pulverizer, to send into coal pulverizer to grind out the required described qualified coal dust of boiler combustion by coal pulverizer by the hot-air that heating boiler obtains, again the coal dust that grinds is sent into boiler furnace, to replace oil inflame.Yet, reach certain level (with the coal difference in coal pulverizer inlet wind-warm syndrome, this temperature is also inequality, generally at 150 ℃-200 ℃) time, just can start coal-grinding, be heated to air temperature required consuming time very long, from ignition of the boiler, begin powder process to coal pulverizer, required time was generally 4-10 hour; When unit starting operation phase or unit large and small after repairing the startup stage, the required time is longer, often reaches 20-70 hour, during this period, boiler can only lean on the oil firing operation, fuel consumption very big.
Existing black furnace milling method is that steam heater is arranged on the female pipe of stokehold heat primary air, utilizes the heat of steam that the air-flow in the air supply duct is heated.Heated hot blast and the inlet temperature that reaches the coal pulverizer requirement after a cold wind mixes are sent into coal pulverizer in order to grind coal dust.Because this method is that Steam Heating is arranged on female pipe, hot blast still will flow through this steam heater when boiler normally moved, and had not only improved the resistance of air-supply pipeline, and had increased the wearing and tearing to steam heater.Simultaneously, this method can only be to the heating of blowing of a coal pulverizer, if need to move many coal pulverizers in the boiler cold-state start-up course, the then essential quantity that increases steam heater increases cost.
Therefore, press for and a kind ofly can reduce running resistance and equipment attrition, and the device of the boiler cold-state powder process of hot blast can be provided for many coal pulverizers simultaneously.
Summary of the invention
The purpose of this utility model provides a kind of coal-fired powder manufacturing apparatus of generating plant pulverized coal boiler, begin the powder process stage to solve traditional generating plant pulverized coal boiler at the coal pulverizer of lighting a fire, heating boiler needs oil consumption and existing black furnace milling method to provide hot blast for an above coal pulverizer simultaneously, and when boiler normally moves, can not make steam heater out of service, hinder problems such as big fan resistance and equipment attrition.
The coal-fired powder manufacturing apparatus of a kind of generating plant pulverized coal boiler described in the utility model, it comprises the steam heater that has coal pulverizer at least and install in the coal-fired fuel pulverizing plant of the air supply duct of coal pulverizer heat supply air, coal-fired fuel pulverizing plant, it is characterized in that: a steam heater 44 is installed on the female pipe 43 of front wall hot blast, the female pipe 43 of the front wall hot blast of described steam heater 44 1 sides and boiler one side wall hot blast be female manages 42 and is connected, and also is connected with corresponding one group of coal pulverizer F, E, D by one group of several hot air isolating air door 46; The female pipe 43 of the front wall hot blast of described steam heater 44 opposite sides is connected with the female pipe 41 of another side wall hot blast of boiler, organizes by another also that several hot air isolating air doors 45 are organized coal pulverizer A with corresponding another, B, C are connected; In the boiler cold-state start-up course, the female pipe of boiler one side wall hot blast (41) or (42) is a closed condition, hot air isolating air door (45) among homonymy coal pulverizer (A, B, C) or (D, E, the F) or (46) keep one at least and are opening, and steam heater (44) the whole hot air isolating air doors of opposite side coal pulverizer (46) or (45) are closed condition simultaneously; When boiler normally moved, boiler both walls warm-air pipe (41,42) all was an opening.
Advantage and the good effect that the utlity model has are as follows:
1, under the boiler cold-state condition, just can promptly heat one time the wind air, for one or more coal pulverizer provides hot blast simultaneously, it is started working, grind out as soon as possible the needed qualified coal dust of boiler combustion, to replace heavy oil or diesel combustion with coal dust within a short period of time, save the required great amount of fuel oil of some combusting boiler usually.
When 2, boiler normally moves, open the hot air isolating air door of the female pipe of both walls hot blast simultaneously, and make steam heater out of service by a blast adjusting the female pipe of both walls hot blast, the hot-air that produces in the boiler is directly sent into coal pulverizer by the air-supply pipeline, thereby reduce flow resistance, and reduction has prolonged the service life of equipment to the wearing and tearing of steam heater.
To sum up, the utility model effect such as can realize energy savings, save time and reduce cost.
Description of drawings
Fig. 1 is an embodiment schematic diagram of the present utility model.
The specific embodiment
The coal-fired powder manufacturing apparatus of a kind of generating plant pulverized coal boiler described in the utility model, it be included in have at least coal pulverizer and to the coal pulverizer heat supply empty the coal-fired fuel pulverizing plant of air supply duct in, steam heater is installed, specifically be that a steam heater is installed on the female pipe of front wall hot blast, the female pipe of front wall hot blast that described steam adds device 44 1 sides is connected with boiler one side wall hot blast mother pipe, also is connected with corresponding one group of coal pulverizer by one group of several hot air isolating air door; The female pipe of the front wall hot blast of described steam heater opposite side is connected with the female pipe of another side wall hot blast of boiler, also organizes several hot air isolating air doors by another and organizes coal pulverizer with corresponding another and be connected.
Fig. 1 carries out the schematic diagram of a kind of embodiment of coal-fired powder manufacturing apparatus of the generating plant pulverized coal boiler of cold wind heating for adopting the utility model, as shown in Figure 1, according to the technical solution of the utility model, a steam heater 44 is installed on the female pipe 43 of front wall hot blast.In the boiler cold-state start-up course, close the female pipe of boiler one side wall hot blast 41 (or 42), while steam off heater 44 opposite side coal pulverizer D, E, F (or A, B, C) the part or all of hot air isolating air door 46 (or 45) in, make the heat primary air air communication in the female pipe of side wall hot blast 42 (or 41) cross the female pipe 43 inflow steam heaters 44 of front wall hot blast, be warming up to the female pipe of stokehold hot blast that satisfies coal pulverizer inlet wind-warm syndrome requirement back inflow steam heater 44 opposite sides in this heat absorption, and the adjusting by hot air isolating air door 45, be assigned to coal pulverizer A, B, C (or D, E, F) in partly or entirely, satisfy dry and powder feeding demand.
When boiler normally moves, open the female pipe 41,42 of both walls hot blast, and adjust the flow of its heat primary air, the pressure of steam heater 44 both sides is equated, reduce a general mood flow that enters steam heater 44, reduce wearing and tearing steam heater 44.
Claims (1)
1, a kind of coal-fired powder manufacturing apparatus of generating plant pulverized coal boiler, it is characterized in that: it comprises the steam heater that has coal pulverizer at least and install in the coal-fired fuel pulverizing plant of the air supply duct of coal pulverizer heat supply air, coal-fired fuel pulverizing plant, it is characterized in that: a steam heater (44) is installed on the female pipe of front wall hot blast (43), the female pipe of the front wall hot blast of described steam heater (44) one sides (43) is connected with female manage (42) of boiler one side wall hot blast, also is connected with corresponding one group of coal pulverizer (F, E, D) by one group of several hot air isolating air door (46); The front wall hot blast of described steam heater (44) opposite side female pipe (43) and boiler female pipes of another side wall hot blast (41) are connected, and also organize several hot air isolating air doors (45) by another and organize coal pulverizer (A, B, C) with corresponding another and be connected; In the boiler cold-state start-up course, the female pipe of boiler one side wall hot blast (41) or (42) is a closed condition, hot air isolating air door (45) among homonymy coal pulverizer (A, B, C) or (D, E, the F) or (46) keep one at least and are opening, and steam heater (44) the whole hot air isolating air doors of opposite side coal pulverizer (46) or (45) are closed condition simultaneously; When boiler normally moved, boiler both walls warm-air pipe (41,42) all was an opening.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201075842U CN201218516Y (en) | 2008-04-02 | 2008-04-02 | Coal-fired pulverizing equipment for power station pulverized coal boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201075842U CN201218516Y (en) | 2008-04-02 | 2008-04-02 | Coal-fired pulverizing equipment for power station pulverized coal boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201218516Y true CN201218516Y (en) | 2009-04-08 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201075842U Expired - Fee Related CN201218516Y (en) | 2008-04-02 | 2008-04-02 | Coal-fired pulverizing equipment for power station pulverized coal boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201218516Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103438473A (en) * | 2013-08-07 | 2013-12-11 | 华电电力科学研究院 | 300MW furnace bottom heating and tiny-oil igniting combination type and no-neighboring-furnace powder conveyance unit starting method |
-
2008
- 2008-04-02 CN CNU2008201075842U patent/CN201218516Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103438473A (en) * | 2013-08-07 | 2013-12-11 | 华电电力科学研究院 | 300MW furnace bottom heating and tiny-oil igniting combination type and no-neighboring-furnace powder conveyance unit starting method |
| CN103438473B (en) * | 2013-08-07 | 2016-01-20 | 华电电力科学研究院 | A kind of 300MW furnace bottom heating is combined without adjacent stove packing auger group starting method with tiny-oil ignition |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090408 Termination date: 20170402 |