CN2733195Y - Fire coal power plant boiler cold state pulverizing apparatus - Google Patents
Fire coal power plant boiler cold state pulverizing apparatus Download PDFInfo
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- CN2733195Y CN2733195Y CN 200320103201 CN200320103201U CN2733195Y CN 2733195 Y CN2733195 Y CN 2733195Y CN 200320103201 CN200320103201 CN 200320103201 CN 200320103201 U CN200320103201 U CN 200320103201U CN 2733195 Y CN2733195 Y CN 2733195Y
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- 239000003245 coal Substances 0.000 title claims abstract description 84
- 238000010298 pulverizing process Methods 0.000 title claims abstract description 28
- 238000010438 heat treatment Methods 0.000 claims description 43
- 239000000446 fuel Substances 0.000 claims description 29
- 239000002817 coal dust Substances 0.000 claims description 19
- 230000008878 coupling Effects 0.000 claims description 6
- 238000010168 coupling process Methods 0.000 claims description 6
- 238000005859 coupling reaction Methods 0.000 claims description 6
- 230000008676 import Effects 0.000 claims description 3
- 239000000843 powder Substances 0.000 abstract description 4
- 238000003801 milling Methods 0.000 abstract description 3
- 238000001035 drying Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract description 2
- 238000007780 powder milling Methods 0.000 abstract 1
- 239000000295 fuel oil Substances 0.000 description 10
- 238000000227 grinding Methods 0.000 description 10
- 238000002485 combustion reaction Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 239000003921 oil Substances 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 239000002283 diesel fuel Substances 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000012797 qualification Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 208000011580 syndromic disease Diseases 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
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Abstract
The utility model provides a fire coal power plant boiler cold state pulverizing apparatus, comprising a coal mill, an air supply duct used for sending hot air to the coal mill, and a coal supply duct sending coal powder in the coal mill to a boiler. The air supply duct is provided with a steam calorifier. Thus, when the temperature in the boiler is low and the temperature of the air used for the coal mill can not dry coal property materials, or when the boiler is still in cold state, the fire coal power plant boiler cold state pulverizing apparatus uses the steam calorifier to heat up. In this way, the air used for the coal mill first goes through the steam calorifier before entering the coal mill through the air supply duct and is heated up by the steam calorifier, so the temperature of the air entering the coal mill satisfies the requirement of drying raw coal. Therefore, the coal mill can start working in the initial stage of the boiler work, and the qualified coal powder desired by milling substitutes oil burning by earliest opportunity to save coal powder milling time and to save oil burning consumption.
Description
Technical field
The utility model relates to a kind of fuel pulverizing plant, relates more specifically to a kind of device of producing coal dust under the coal-fired power station boiler cold conditions.
Background technology
Existing coal-fired thermal power generation unit accounts for more than 70% of national total installed capacity generate output, and every coal-fired unit is made up of boiler, steam turbine and generator three parts.Existing station boiler generally all adopts coal-fired mode, need grind very little powdered granule to raw coal, and promptly coal dust is blown into the burning of burner hearth inner suspension by air with it.Therefore, station boiler all is equipped with corresponding coal-fired fuel pulverizing plant, is used for the qualified coal dust of the required granularity of production boiler combustion, temperature and humidity.
Coal pulverizer generally has the requirement of granularity, temperature and humidity aspect to sending into the coal that grinds in the coal pulverizer.In order to obtain the qualified coal dust of desired particle size, temperature and humidity, boiler combustion the startup stage, general large-scale 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 this process will consume a large amount of fuel oils.Reason is, wind-warm syndrome at the coal pulverizer inlet arrives certain temperature (with the coal difference, this temperature is also inequality, generally at 150 ℃-200 ℃) time, just can start coal pulverizer, before this, to in coal pulverizer, carry out coal-fired heat drying, grind out simultaneously and reach the qualified coal dust that temperature, granularity and humidity etc. require, and by the pipeline of delivering coal qualified coal dust is transported to and burns in the boiler, thereby by replace the burning of fuel oil at boiler internal combustion coal dust.
Particularly, in actual conditions, because the boiler volume of power plant is very huge, heating boiler, the air that coal-grinding is used are heated to certain degree need expend the long time.The coal-fired power station boiler that adopt in the thermal power plant from ignition of the boiler, begins powder process to coal pulverizer, and along with the difference of unit capacity, structure, and boiler structure pattern and coal pulverizer working method is different, and required time is difference also, generally needs 4-10 hour; When starting after unit starting trial run stage, the big light maintenance of unit, required time is longer, often reaches 20-70 hour, and during this period, boiler only by the oil firing operation, consume great amount of fuel.
Therefore, press for a kind of energy savings, save time, fuel pulverizing plant that reduces cost and milling method.
The utility model content
The purpose of this utility model provides a kind of coal-fired power station boiler cold conditions fuel pulverizing plant of can energy savings, shortening boiler startup and coal-grinding time, reducing cost.
For realizing order of the present utility model, a kind of coal-fired power station boiler cold conditions fuel pulverizing plant is provided, this device comprises coal pulverizer, be used for sending into the pipeline of delivering coal of boiler to the air supply duct of coal pulverizer feed hot-air with the coal dust in the coal pulverizer, on described air supply duct steam heater is installed.
Temperature in boiler is lower, when the temperature of the air that coal-grinding is used can not the moisture-free coal material, raw coal for example, perhaps when boiler also is in cold conditions, utilize the steam heater heating, the air used of coal-grinding earlier through steam heater, was heated by steam the device heating, thereby makes the air themperature that enters in the coal pulverizer satisfy the requirement of dry raw coal before entering coal pulverizer by air supply duct like this.Therefore coal pulverizer just can be started working at the initial stage of boiler work, ground required qualified coal dust and replaced oil inflame as soon as possible, thereby saved the time of coal powder grinding, had saved the consumption of fuel oil.
Aforesaid coal-fired power station boiler cold conditions fuel pulverizing plant, the end away from coal pulverizer of wherein said air supply duct is connected with boiler.Therefore between boiler and coal pulverizer, form loop, the air that provides moisture-free coal to use to coal pulverizer by boiler selectively, and the coal of burning usefulness is provided to boiler by coal pulverizer.For example, when boiler is in non-cold conditions, the air that provides moisture-free coal to use to coal pulverizer by boiler.
Aforesaid coal-fired power station boiler cold conditions fuel pulverizing plant, wherein said steam heater comprises heating part and is positioned at the heating part both sides and is used for the coupling part that is connected with described air supply duct that each leisure of described coupling part has the connector that is communicated with air supply duct away from the end of heating part.
Thus, described steam heater is convenient to install with air supply duct and is connected, and steam heater can be made the standard block member of being convenient to install with the removal air supply duct.
Aforesaid coal-fired power station boiler cold conditions fuel pulverizing plant, the heating part of wherein said steam heater has at least one group of heating element heater, described every group of heating element heater all comprises number row heating tube at least, described heating tube has the opening that imports and derive steam, so that steam heats heating tube when flowing through heating tube.
General, there is the steam unit of oneself in power plant, be communicated with described steam heater and steam unit by described steam openings, so just can make full use of power plant's its other resources, and do not need to seek in addition the energy, improved the utilization rate of steam, reduced production costs, good economic benefit has been arranged.Certainly, this opening is set is convenient to external vapour source arbitrarily, described for this reason fuel pulverizing plant has bigger alternative to the vapour source that utilizes.
Aforesaid coal-fired power station boiler cold conditions fuel pulverizing plant, but have the cold air inlet of switch on the wherein said air supply duct.
Aforesaid coal-fired power station boiler cold conditions fuel pulverizing plant, but thereby wherein can also be provided with conventional being used at the cold air inlet place of described switch regulates the various adjusting devices that the opening and closing degree of described cold air inlet is regulated cold flow.
The size that feeds cold flow can be controlled by the adjusting device that is arranged on the cold air inlet place, the temperature of the air that feeds coal pulverizer can be controlled more accurately.When particularly the too high temperature of air in entering coal pulverizer may be caused danger, for fear of coal dust in the coal pulverizer internal combustion, but then can feed cold wind by the cold air inlet by switch, reduce temperature, thereby avoid causing danger.
In sum, cold conditions milling method and fuel pulverizing plant that the utility model provides make coal pulverizer just can start working at the ignition of the boiler initial stage, grind coal dust.Therefore, compared with prior art, saved the fuel consumption in the boiler startup process greatly, valuable petroleum resources have been saved, in addition, fuel cost reduces (caloric value of unit diesel oil is about the twice of unit fire coal, but the price of fuel oil (3000 yuan/ton) is about 15 times of fire coal (200 yuan/ton)), remarkable in economical benefits significantly.Particularly, the utility model improvements over the prior art have the important meaning of energy savings.
Description of drawings
Fig. 1 is the schematic diagram of expression according to the black furnace fuel pulverizing plant of coal-fired power station boiler of the present utility model;
Fig. 2 is the schematic diagram according to a kind of embodiment of applied steam heater in the black furnace fuel pulverizing plant of coal-fired power station boiler of the present utility model.
The specific embodiment
Specific embodiment of the utility model is described below with reference to the accompanying drawings.
Fig. 1 is the schematic diagram of expression according to an embodiment of the black furnace fuel pulverizing plant of coal-fired power station boiler of the present utility model.As shown in Figure 1, the black furnace fuel pulverizing plant comprises that the hot-air that coal-grinding is used sends into the air supply duct 1 of coal pulverizer 3 and the coal dust in the coal pulverizer 3 is transported to the pipeline of delivering coal (pipeline of delivering coal belongs to prior art, and is not shown) in the boiler herein.As shown in the figure, according to the utility model, on the air supply duct 1 of the hot-air importing coal pulverizer 3 that coal-grinding is used, steam heater 2 is housed.Direction among the figure shown in the arrow is the direction to coal pulverizer feed hot-air.General in large-scale thermal power plant, a boiler (not shown) can be equipped with several coal pulverizers 3 simultaneously.A represents the female pipe of hot blast one time among Fig. 1, is used to all coal pulverizers 3 that hot-air is provided, and can be connected with a plurality of wind-heat airduct road B on the female pipe of this hot blast, is used for providing hot blast by air supply duct 1 for a corresponding coal pulverizer respectively.For for simplicity, only show in detail the black furnace fuel pulverizing plant of a coal pulverizer 3 among Fig. 1, have many coal pulverizers the black furnace fuel pulverizing plant principle similarly, so repeat no more.Certainly, the steam heater among Fig. 1 also can be located in the air supply duct and not be connected with boiler.
As shown in Figure 2, described steam heater 2 comprises heating part 21, and heated air is limited housing 215 within it and is positioned at the coupling part 22 of heating part 21 dual-sides as housing 215 parts.Steam heater 2 by described coupling part 22 in end (two ends, the left and right sides among Fig. 2) away from heating part, be communicated with air supply duct 1 among Fig. 1 by the described connector P that is communicated with air supply duct, form the part of the pipeline of the air that the circulation coal-grinding uses with air supply duct 1, as shown in Figure 1.Arrow among Fig. 2 is represented air that coal-grinding the uses direction by steam heater 2.Described heating part 21 has at least one group of heating element heater 213, the described heating element heater 213 of respectively organizing is made up of number row heating tube 211, be 2 groups of heating element heaters 213 shown in Fig. 2, every group of heating element heater has 4 row's heating tubes 211, and this heating tube 211 keeps at a certain distance away each other.Described heating tube 211 two ends have the opening 212,214 that can import and derive steam, can select one of them introducing port of opening 212,214 as steam, another is as export mouth, opening 212,214 can be connected with the steam unit that for example power plant uses, thereby the steam in the steam unit can be entered in the heating tube 211 by opening 212,214, heating tube 211 is heated, enters air in the steam heater 2 with heating.Described steam can be isolated with the heated air in the housing 215.
When starting boiler, if boiler is heated,, the temperature of boiler integral body is raise because boiler is bigger by fuel oil or other fuel, the air that coal-grinding is used enters in the coal pulverizer 3 by the air supply duct 1 that is communicated with coal pulverizer 3.
Yet, if described air is before entering coal pulverizer 3, earlier by being arranged on the steam heater 2 in the air supply duct 1, quilt heating tube 211 wherein is heated to high temperature, for example 180 ℃ to 200 ℃, then can make the temperature that enters the hot-air in the coal pulverizer 3 satisfy the requirement of heating and dry coal dust rapidly.Coal pulverizer just can put into operation at the initial stage of boiler startup like this, can grind out coal dust earlier, replace fuel oil to burn thereby send in the boiler, can reduce the consumption of fuel oil, reduce production costs by the desired qualified coal dust that the pipeline of delivering coal that is communicated with boiler will grind out.
In practical operation, can provide steam source for described steam heater 2 by the steam unit that power plant uses, thereby the air that the heating tube 211 in the steam heater 2 is in the condition of high temperature heating air supply duct 1 makes coal pulverizer work to send into coal pulverizer.Therefore, improve the steam utilization of power plant, reduce production costs.
Preferably, as shown in Figure 1, but can have the cold air inlet 4 of switch on air supply duct 1, described cold air inlet 4 is closed condition when not using.When through the too high temperature of air of steam heater 2 after being heated, can open cold air inlet to air supply duct 1 transporting cold wind with in and heat, the control temperature is in order to avoid the coal dust in the coal pulverizer 3 that ignites because of too high temperature of air is caused danger.
In addition, the conventional adjusting device of regulating openings of sizes can also be set at above-mentioned cold air inlet 4 places, regulate the throughput that is transported to the cold wind in the air supply duct 1 by the size of control cold air inlet extent of opening.For example, cold air inlet is formed by a kind of rotary door, regulates the inlet of cold wind by the rotational angle of adjustment doors.
In order further to save fuel oil, can before a combusting boiler, just utilize described steam heater to add hot-air in advance, and hot-air is sent into coal pulverizer; Coal pulverizer is started working, when boiler is lighted, just can begin to burn coal.
Though the utility model discloses as above with preferred embodiment; yet it is not in order to limit the utility model; any those of ordinary skills; in not breaking away from design of the present utility model and protection domain; when doing a little conversion and modification, all should be as the criterion with the claim scope of qualification and embodiment the utility model content.
Claims (6)
1, a kind of coal-fired power station boiler cold conditions fuel pulverizing plant, this device comprises coal pulverizer, be used for the air supply duct of hot-air being provided and the coal dust in the coal pulverizer being sent into the pipeline of delivering coal of boiler to coal pulverizer, it is characterized in that: on described air supply duct steam heater is installed.
2, coal-fired power station boiler cold conditions fuel pulverizing plant as claimed in claim 1 is characterized in that, the end away from coal pulverizer of described air supply duct is connected with boiler.
3, coal-fired power station boiler cold conditions fuel pulverizing plant as claimed in claim 1 or 2, it is characterized in that, described steam heater comprises heating part and the coupling part that is connected with described air supply duct of being used for that is positioned at the heating part both sides, and described coupling part has the connector that is communicated with air supply duct in the end away from heating part.
4, coal-fired power station boiler cold conditions fuel pulverizing plant as claimed in claim 1 or 2, it is characterized in that, the heating part of described steam heater has at least one group of heating element heater, described every group of heating element heater all comprises number row heating tube at least, described heating tube has the opening that imports and derive steam, so that vapor stream heats heating tube when heating tube.
5, coal-fired power station boiler cold conditions fuel pulverizing plant as claimed in claim 1 or 2 is characterized in that, but has the cold air inlet of switch on the described air supply duct.
6, coal-fired power station boiler cold conditions fuel pulverizing plant as claimed in claim 5 is characterized in that, is provided with the opening and closing degree that is used to regulate described cold air inlet at described cold air inlet place, thereby regulates the adjusting device of air quantity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320103201 CN2733195Y (en) | 2003-11-10 | 2003-11-10 | Fire coal power plant boiler cold state pulverizing apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200320103201 CN2733195Y (en) | 2003-11-10 | 2003-11-10 | Fire coal power plant boiler cold state pulverizing apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2733195Y true CN2733195Y (en) | 2005-10-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200320103201 Expired - Lifetime CN2733195Y (en) | 2003-11-10 | 2003-11-10 | Fire coal power plant boiler cold state pulverizing apparatus |
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| CN (1) | CN2733195Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1311194C (en) * | 2003-11-10 | 2007-04-18 | 华北电力科学研究院有限责任公司 | Cold state powder making method and cold state powder coal making device for coal burning powder station boiler |
| 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 |
| CN102506407A (en) * | 2011-07-20 | 2012-06-20 | 皖能合肥发电有限公司 | Cold start oil auxiliary heating system of boiler and heat source-less independent starting method of generating set |
| CN102716794A (en) * | 2012-06-26 | 2012-10-10 | 烟台龙源电力技术股份有限公司 | Cold furnace powder making device for fan mill powder making system boiler |
| CN110986080A (en) * | 2019-11-15 | 2020-04-10 | 大唐华银电力股份有限公司耒阳分公司 | Boiler pulverized coal concentration measuring and adjusting device |
-
2003
- 2003-11-10 CN CN 200320103201 patent/CN2733195Y/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1311194C (en) * | 2003-11-10 | 2007-04-18 | 华北电力科学研究院有限责任公司 | Cold state powder making method and cold state powder coal making device for coal burning powder station boiler |
| 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 |
| CN102506407A (en) * | 2011-07-20 | 2012-06-20 | 皖能合肥发电有限公司 | Cold start oil auxiliary heating system of boiler and heat source-less independent starting method of generating set |
| CN102716794A (en) * | 2012-06-26 | 2012-10-10 | 烟台龙源电力技术股份有限公司 | Cold furnace powder making device for fan mill powder making system boiler |
| CN110986080A (en) * | 2019-11-15 | 2020-04-10 | 大唐华银电力股份有限公司耒阳分公司 | Boiler pulverized coal concentration measuring and adjusting device |
| CN110986080B (en) * | 2019-11-15 | 2021-12-31 | 大唐华银电力股份有限公司耒阳分公司 | Boiler pulverized coal concentration measuring and adjusting device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Effective date of abandoning: 20031110 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |