CN201218515Y - Fire coal pulverizing device of power station pulverized coal boiler - Google Patents
Fire coal pulverizing device of power station pulverized coal boiler Download PDFInfo
- Publication number
- CN201218515Y CN201218515Y CNU2008201075838U CN200820107583U CN201218515Y CN 201218515 Y CN201218515 Y CN 201218515Y CN U2008201075838 U CNU2008201075838 U CN U2008201075838U CN 200820107583 U CN200820107583 U CN 200820107583U CN 201218515 Y CN201218515 Y CN 201218515Y
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- Prior art keywords
- coal
- air
- boiler
- primary air
- steam heater
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- 239000003245 coal Substances 0.000 title claims abstract description 66
- 238000010298 pulverizing process Methods 0.000 title claims abstract description 20
- 239000000446 fuel Substances 0.000 claims description 17
- 239000000295 fuel oil Substances 0.000 abstract description 6
- 239000000843 powder Substances 0.000 abstract description 6
- 239000002283 diesel fuel Substances 0.000 abstract description 2
- 230000002035 prolonged effect Effects 0.000 abstract description 2
- 238000005299 abrasion Methods 0.000 abstract 1
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 description 10
- 238000010438 heat treatment Methods 0.000 description 9
- 239000002817 coal dust Substances 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 238000002485 combustion reaction Methods 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 238000010010 raising Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000000227 grinding Methods 0.000 description 2
- 230000036651 mood Effects 0.000 description 2
- 208000011580 syndromic disease Diseases 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 239000000203 mixture Substances 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
- 239000002918 waste heat Substances 0.000 description 1
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Abstract
The utility model relates to a coal pulverizing device of a pulverized coal fired boiler in a power station, comprising a coal pulverizing device provided with at least a coal pulverizer, a supply air duct for supplying hot air to the coal pulverizer, and a steam heater mounted in the coal pulverizing device. The coal-fired powder manufacturing device is characterized in that the supply air duct comprises a thermal primary air pipeline enabling the hot air of the pulverized coal fired boiler to enter the coal pulverizer directly and a primary air pipeline where the steam heater which is connected with the thermal primary air pipeline in parallel to form a bypath, and a hot air insulating door is arranged on the thermal primary air pipeline. The utility model has the advantages that the coal pulverizer can be rapidly enabled to start working without waiting for a cooled boiler to heat so that heavy oil or diesel oil is replaced by coal powder to burn within a shorter time, and a great amount of fuel oil generally needed for igniting the boiler is saved. The pulverized coal fired boiler can generate hot air needed for operating the coal pulverizer when running normally, at this moment, the steam heater can quit running, thereby the flow resistance is reduced, the abrasion on the steam heater is lowered, and the service life of the device 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.
The device of the boiler cold-state powder process of therefore, press for a kind of energy savings, saving time, reducing cost.
Summary of the invention
The purpose of this utility model provides a kind of coal-fired fuel pulverizing plant 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 when boiler normally moved, air supply duct hindered problems such as big and steam heater serious wear.
The coal-fired fuel pulverizing plant of a kind of generating plant pulverized coal boiler described in the utility model, it comprises having coal pulverizer at least and to the coal-fired fuel pulverizing plant of the air supply duct of coal pulverizer heat supply air, the steam heater of installing in the coal-fired fuel pulverizing plant, it is characterized in that: described air supply duct comprises heat primary air pipeline and the air pipe line two parts that form the steam heater place of bypass in parallel with the heat primary air pipeline that directly make the boiler hot air enter coal pulverizer, described heat primary air pipeline is meant the heat primary air branch road or the female pipe of heat primary air of coal pulverizer, is provided with the hot air isolating air door on the heat primary air branch road.
A kind of coal-fired fuel pulverizing plant of generating plant pulverized coal boiler as mentioned above, at the place, hot air isolating air door two ends that goes on the heat primary air branch road of a coal pulverizer, the bypass that a wind branch road in parallel forms, a hot air isolating air door and a steam heater are installed in series in this bypass.
A kind of coal-fired fuel pulverizing plant of generating plant pulverized coal boiler as mentioned above, at the hot air isolating air door, hot blast damper and the place, cold wind air-supply pipeline series arm two ends that go on the heat primary air branch road of a coal pulverizer, the bypass that a wind branch road in parallel forms, the hot air isolating air door that is installed in series in this bypass, a steam heater and a hot blast damper.
A kind of coal-fired fuel pulverizing plant of generating plant pulverized coal boiler as mentioned above, place, hot air isolating air door two ends on the female pipe of the heat primary air on boiler left side or right side, the bypass that a wind branch road in parallel forms, in this bypass, steam heater is installed, the female pipe outlet of described heat primary air is connected with the female pipe of front wall hot blast, and the female pipe of front wall hot blast is connected with each coal pulverizer.
Advantage and the good effect that the utlity model has are as follows:
1, need not to wait for the boiler heating of cold conditions, just can promptly supply with coal pulverizer with hot-air, make it grind out the needed qualified coal dust of boiler combustion as soon as possible,, save the required great amount of fuel oil of some combusting boiler usually to replace heavy oil or diesel combustion with coal dust within a short period of time.
Can produce the hot-air that satisfies coal pulverizer operation needs when 2, boiler normally moves, at this moment, steam heater can be out of service, thereby reduce flow resistance, and reduce the wearing and tearing to steam heater, prolonged the service life of equipment.
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.
Fig. 2 is another embodiment schematic diagram of the present utility model.
Fig. 3 is the 3rd an embodiment schematic diagram of the present utility model.
The specific embodiment
Fig. 1 carries out the schematic diagram of a kind of embodiment of cold wind heating for adopting method one of the present utility model, as shown in Figure 1, in hot air isolating air door 13 a places bypass 14 in parallel of going on the heat primary air branch road 12 of coal pulverizer M, a hot air isolating air door 16 and a steam heater 15 are installed in series in this bypass 14.In the boiler cold-state start-up course, a general mood stream temperature of being sent here by the female pipe 11 of front wall hot blast is lower, at this moment, close the hot air isolating air door 13 on heat primary air branch road 12 sections in parallel, open the hot air isolating air door 16 in the bypass in parallel simultaneously, make a wind all flow through steam heater 15 from the female pipe 11 of front wall hot blast, sent back to hot blast branch road 12 behind the heat temperature raising, and mix through the cold wind that hot blast damper 17 is adjusted behind the flows with a cold airduct road 18 is sent here, deliver to coal pulverizer M after satisfying the coal-grinding requirement, in order to dry and blow the coal dust that is ground.
In the boiler normal course of operation, enough high by boiler self to the hot air temperature that air supply duct provides, at this moment, open the hot air isolating door 13 on heat primary air branch road 12 sections in parallel, close the hot air isolating air door 16 in the bypass in parallel, make the heat primary air air-flow directly deliver to coal pulverizer by hot blast branch road 12, reduced the fluid resistance loss of heat primary air air-flow, simultaneously, reduced the wearing and tearing of air-flow, improved performance driving economy steam heater 15.
Fig. 2 carries out the schematic diagram of the another kind of embodiment of cold wind heating for adopting method two of the present utility model, as shown in Figure 2, going on the heat primary air branch road 22 of coal pulverizer M, with hot air isolating air door 27, hot blast damper 28 and 29 bypasses 23 in parallel of a cold air pipe line, the hot air isolating air door 26 of in this bypass 23, being installed in series, a steam heater 25 and a hot blast damper 24.In the boiler cold-state start-up course, a general mood stream temperature of being sent here by the female pipe 21 of front wall hot blast is lower, at this moment, close the hot air isolating air door 27 on heat primary air branch road 22 sections in parallel, open the hot air isolating air door 26 in the bypass in parallel simultaneously, make a wind all flow through steam heater 25 from the female pipe 21 of front wall hot blast, heat temperature raising is after after hot blast damper 24 adjusts to suitable flow, return hot blast branch road 22, and be sent to coal pulverizer M, satisfy dry and blow the needs of the coal dust that grinds.
In the boiler normal course of operation, the heat primary air temperature of being sent here by side wall hot air duct 21 is enough high, at this moment, open the hot air isolating door 27 on heat primary air branch road 22 sections in parallel, close the hot air isolating air door 26 in the bypass in parallel, make the heat primary air air-flow directly by hot blast branch road 22, adjust air door 28 through hot blast and adjust flow, and after being mixed to suitable temperature with a cold wind of sending here from a cold air pipe line 29, be sent to coal pulverizer M and go, reduced the fluid resistance loss of heat primary air air-flow, simultaneously, reduced the wearing and tearing of air-flow, improved performance driving economy steam heater 25.
Fig. 3 carries out the schematic diagram of the third embodiment of cold wind heating for adopting method three of the present utility model, as shown in Figure 3, hot air isolating air door 32 places bypass 33 in parallel on the female pipe 31 of boiler one side wall (left side or right side) hot blast, and steam heater 34 is installed in this bypass 33.In the boiler cold-state start-up course, close the hot air isolating air door 32 on the female pipe 31 of side wall hot blast, make temperature can not satisfy heat primary air that coal pulverizer inlet requires and return the female pipe 31 of side wall hot blast again after through steam heater 34 heat temperature raisings, being assigned at the female pipe of front wall hot blast 35 places needs hot blast to carry out one or more coal pulverizer of powder process.
When boiler normally moves, a wind-warm syndrome degree in the female pipe 31 of side wall hot blast is enough high, can satisfy coal pulverizer operate as normal needs, at this moment, open the hot air isolating air door 32 on the female pipe of side wall hot blast, because the resistance of female pipe 31 sections in parallel of side wall hot blast is much smaller than the resistance of steam heater 34 and place bypass 33, so most heat primary air air-flow flows directly into the female pipe 25 of front wall hot blast through the female pipe 31 of side wall hot blast, and be assigned to each coal pulverizer, so just reduce the wearing and tearing to steam heater in service, reduced pipe resistance simultaneously.
Claims (4)
1, a kind of coal-fired fuel pulverizing plant of generating plant pulverized coal boiler, it is characterized in that: it comprises having coal pulverizer at least and to the coal-fired fuel pulverizing plant of the air supply duct of coal pulverizer heat supply air, the steam heater of installing in the coal-fired fuel pulverizing plant, it is characterized in that: described air supply duct comprises heat primary air pipeline and the air pipe line two parts that form the steam heater place of bypass in parallel with the heat primary air pipeline that directly make the boiler hot air enter coal pulverizer, described heat primary air pipeline is meant the heat primary air branch road or the female pipe of heat primary air of coal pulverizer, is provided with the hot air isolating air door on the heat primary air pipeline.
2, a kind of coal-fired fuel pulverizing plant of generating plant pulverized coal boiler according to claim 1, it is characterized in that: at the place, hot air isolating air door two ends that goes on the heat primary air branch road of a coal pulverizer, the bypass that a wind branch road in parallel forms, a hot air isolating air door and a steam heater are installed in series in this bypass.
3, a kind of coal-fired fuel pulverizing plant of generating plant pulverized coal boiler according to claim 1, it is characterized in that: at the hot air isolating air door, hot blast damper and the place, cold wind air-supply pipeline series arm two ends that go on the heat primary air branch road of a coal pulverizer, the bypass that a wind branch road in parallel forms, the hot air isolating air door that is installed in series in this bypass, a steam heater and a hot blast damper.
4, a kind of coal-fired fuel pulverizing plant of generating plant pulverized coal boiler according to claim 1, it is characterized in that: the place, hot air isolating air door two ends on the female pipe of the heat primary air on boiler left side or right side, the bypass that a wind branch road in parallel forms, in this bypass, steam heater is installed, the female pipe outlet of described heat primary air is connected with the female pipe of front wall hot blast, and the female pipe of front wall hot blast is connected with each coal pulverizer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201075838U CN201218515Y (en) | 2008-04-02 | 2008-04-02 | Fire coal pulverizing device of power station pulverized coal boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201075838U CN201218515Y (en) | 2008-04-02 | 2008-04-02 | Fire coal pulverizing device of power station pulverized coal boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201218515Y true CN201218515Y (en) | 2009-04-08 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201075838U Expired - Fee Related CN201218515Y (en) | 2008-04-02 | 2008-04-02 | Fire coal pulverizing device of power station pulverized coal boiler |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201218515Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102155842A (en) * | 2011-02-22 | 2011-08-17 | 黑龙江省电力科学研究院 | System for increasing pulverizing and drying output force during doped lignitous coal burning of burning bituminous coal boiler |
| CN105987379A (en) * | 2015-03-06 | 2016-10-05 | 烟台龙源电力技术股份有限公司 | Boiler unit |
-
2008
- 2008-04-02 CN CNU2008201075838U patent/CN201218515Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102155842A (en) * | 2011-02-22 | 2011-08-17 | 黑龙江省电力科学研究院 | System for increasing pulverizing and drying output force during doped lignitous coal burning of burning bituminous coal boiler |
| CN102155842B (en) * | 2011-02-22 | 2012-07-25 | 黑龙江省电力科学研究院 | System for increasing pulverizing and drying output force during doped lignitous coal burning of burning bituminous coal boiler |
| CN105987379A (en) * | 2015-03-06 | 2016-10-05 | 烟台龙源电力技术股份有限公司 | Boiler unit |
| CN105987379B (en) * | 2015-03-06 | 2018-09-14 | 烟台龙源电力技术股份有限公司 | Boiler controller system |
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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 |