JPH028610A - Pulverized coal combustion device - Google Patents
Pulverized coal combustion deviceInfo
- Publication number
- JPH028610A JPH028610A JP88154887A JP15488788A JPH028610A JP H028610 A JPH028610 A JP H028610A JP 88154887 A JP88154887 A JP 88154887A JP 15488788 A JP15488788 A JP 15488788A JP H028610 A JPH028610 A JP H028610A
- Authority
- JP
- Japan
- Prior art keywords
- air
- pulverized coal
- air preheater
- preheater
- temperature
- 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.)
- Granted
Links
- 239000003245 coal Substances 0.000 title claims abstract description 33
- 238000002485 combustion reaction Methods 0.000 title claims description 16
- 238000010304 firing Methods 0.000 abstract 1
- 238000010438 heat treatment Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 238000009423 ventilation Methods 0.000 description 22
- 238000010586 diagram Methods 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
Classifications
-
- 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
Landscapes
- Air Supply (AREA)
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は多種類の石炭の微粉炭を燃焼するための微粉炭
燃焼装置に関する。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a pulverized coal combustion apparatus for burning pulverized coal of various types of coal.
従来の微粉炭燃焼装置として、例えば、第４図及び第５
図に示すものがある。As a conventional pulverized coal combustion device, for example, Fig. 4 and Fig. 5
There is one shown in the figure.
１Ｍ４図において、押込通風機１及び−次通風機２には
空気予熱器３が接続され、この空気予熱器３及び−次通
風機２に微粉炭機４が接続されている。In Figure 1M4, an air preheater 3 is connected to the forced draft fan 1 and the secondary draft fan 2, and a pulverizer 4 is connected to the air preheater 3 and the secondary draft fan 2.
第４図の構成では、−次通風機２によって昇圧された空
気が空気予熱器３でボイラよりの排ガスと熱交換され、
加熱された空気（または−次通風機２よりの冷空気を混
合した空気）が微粉炭機４に供給される。微粉炭機４か
らは、−次空気に混合された微粉炭が出力され、ボイラ
のバーナ（不図示）に供給される。また、押込通風機１
による空気は、空気予熱器３で予熱され、二次空気とし
てバーナに供給される。In the configuration shown in FIG. 4, the air pressurized by the negative fan 2 is heat exchanged with the exhaust gas from the boiler in the air preheater 3,
Heated air (or air mixed with cold air from the secondary fan 2) is supplied to the pulverizer 4. Pulverized coal mixed with secondary air is output from the pulverized coal machine 4 and supplied to a burner (not shown) of a boiler. In addition, forced ventilation fan 1
The air is preheated by an air preheater 3 and supplied to the burner as secondary air.
また、第５図においては、押込通風機１よりの予熱空気
に対し一次通風機２を用いて昇圧した空気を微粉炭機４
へ供給する構成がとられている。In addition, in FIG. 5, air that has been pressurized using the primary ventilation fan 2 for the preheated air from the forced ventilation fan 1 is transferred to the pulverizer 4.
The configuration is such that the supply is supplied to
しかし、従来の微粉炭燃焼装置にあっては、設計炭種以
外の石炭の燃焼について配慮がなされていない。このた
め、例えば、高湿分の石炭のように熱空気の温度上昇が
要求される場合、空気予熱器の伝熱面積から決まる最高
温度までしか上昇できず、微粉炭が適切に乾燥できない
という問題があった。However, in conventional pulverized coal combustion devices, no consideration is given to the combustion of coal other than the designed coal types. For this reason, for example, when the temperature of hot air is required to rise, such as when dealing with high-humidity coal, the temperature can only be raised to the maximum temperature determined by the heat transfer area of the air preheater, resulting in the problem that pulverized coal cannot be properly dried. was there.
本発明は、上記従来技術の実情に鑑みてなされたもので
、空気予熱器の伝熱面積を増やすことなく熱空気の温度
を上昇できるようにした微粉炭燃焼装置を提供すること
を目的とする。The present invention has been made in view of the actual state of the prior art described above, and an object of the present invention is to provide a pulverized coal combustion device that can increase the temperature of hot air without increasing the heat transfer area of an air preheater. .
上記目的を達成するために本発明は、微粉炭機と、排ガ
スの熱交換を利用して予熱した空気を前記微粉炭機へ供
給する空気予熱器と、該空気予熱器へ昇圧空気を供給し
或いは前記空気予熱器よりの予熱空気を昇圧して前記微
粉炭機へ供給する一次通風機とを備えた微粉炭燃焼装置
において、前記空気予熱器より出力される予熱空気の一
部を前記空気予熱器の入側へ循環させる熱空気再循環系
を設げるようにしたものである。In order to achieve the above object, the present invention provides a pulverizer, an air preheater for supplying preheated air to the pulverizer using heat exchange of exhaust gas, and supplying pressurized air to the air preheater. Alternatively, in a pulverized coal combustion apparatus comprising a primary ventilator that boosts the pressure of preheated air from the air preheater and supplies it to the pulverizer, a part of the preheated air output from the air preheater is used to preheat the air. A hot air recirculation system is installed to circulate hot air to the inlet side of the container.
上記構成の微粉炭燃焼装置では、熱空気再循環系が予熱
し、た空気の一部を一次通風機または押込通風機を介し
て空気予熱器の入側ヘリターンさせ、空気予熱器の入口
冷空気温度を上昇させる。この入口冷空気温度の上昇と
共に出口熱空気温度は上昇する。したがって、高湿分炭
のように高い熱空気温度を必要とする条件に対処するこ
とが可能になる。In the pulverized coal combustion equipment with the above configuration, the hot air recirculation system preheats a portion of the air and returns a portion of the preheated air to the inlet side of the air preheater via the primary draft fan or forced draft fan, and cools the air at the inlet of the air preheater. Increase temperature. As the inlet cold air temperature rises, the outlet hot air temperature also rises. Therefore, it becomes possible to cope with conditions that require high hot air temperature, such as high humidity coal.
以下、本発明の一実施例を図面に基づいて説明する。 Hereinafter, one embodiment of the present invention will be described based on the drawings.
第１図は本発明による微粉炭燃焼装置の一実施例を示す
系統図である。なお、以下の実施例においては、前記第
４図及び第５図に示した部材と同一または同一機能を有
するものには、同一引用数字を用いたので重複する説明
を省略する。FIG. 1 is a system diagram showing an embodiment of a pulverized coal combustion apparatus according to the present invention. In the following embodiments, the same reference numerals are used for parts that are the same as or have the same functions as those shown in FIGS. 4 and 5, and therefore redundant explanations will be omitted.
本実施例は、空気予熱器３の押込通風機１に連通して熱
空気（予熱空気）をバーナへ供給する通風系ＩＡより、
熱空気の一部を分岐し、循環系５を介して一次通風機２
０入側へ帰還させるようにしたところに特徴がある。な
お、循環系５内には、七の帰還量を調節するためのダン
パ６が設けられている。また、空気予熱器３と微粉炭機
４との間を接続する通風系２Ａには、通風系ＩＡとの間
にダンパ７が設げられ、通風系２Ａ内の一部の熱風を通
風系ＩＡに供給できるようにされている。なお、８は微
粉炭機４に供給する熱空気の温度を調節するためのバイ
パスダンパであり、空気予熱器３の入側の冷空気を出側
の熱空気に混合させることができるようにされている。In this embodiment, the ventilation system IA communicates with the forced draft fan 1 of the air preheater 3 and supplies hot air (preheated air) to the burner.
A part of the hot air is branched and sent to the primary ventilation fan 2 via the circulation system 5.
The feature is that it returns to the 0 input side. Note that a damper 6 is provided within the circulation system 5 to adjust the amount of feedback. In addition, a damper 7 is provided between the ventilation system 2A that connects the air preheater 3 and the pulverizer 4 and the ventilation system IA, so that some of the hot air in the ventilation system 2A is transferred to the ventilation system IA. It is designed to be able to supply Note that 8 is a bypass damper for adjusting the temperature of the hot air supplied to the pulverizer 4, and is designed to mix the cold air on the inlet side of the air preheater 3 with the hot air on the outlet side. ing.
第１図の構成において、−次通風機２によって昇圧され
た空気は、空気予熱器３内でボイラ排ガスと熱交換され
、熱空気となって通風系２Ａへ出力される。この熱空気
にバイパスダンパ８よりの冷空気が混合され、規定の温
度に調整された熱空気が微粉炭機４へ供給される。In the configuration shown in FIG. 1, the air pressurized by the secondary ventilation fan 2 exchanges heat with the boiler exhaust gas in the air preheater 3, becomes hot air, and is output to the ventilation system 2A. This hot air is mixed with cold air from the bypass damper 8, and the hot air adjusted to a specified temperature is supplied to the pulverizer 4.
一方、燃焼用空気は通風系ＩＡより与えられる。On the other hand, combustion air is provided from the ventilation system IA.
この場合、押込通風機１によって昇圧された空気が空気
予熱器３でボイラ排ガスと熱交換されて熱空気になり、
通風系ＩＡへ出力することにより作られる。この熱空気
が通風系ＩＡを経てバーナへ供給される。In this case, the air pressurized by the forced draft fan 1 exchanges heat with the boiler exhaust gas in the air preheater 3 and becomes hot air.
It is created by outputting to the ventilation system IA. This hot air is supplied to the burner via ventilation system IA.
この通風系ＩＡ内の熱空気の一部が循環系５を介して一
次通風機２の入側へ送り込まれ、冷空気に混合されて一
次通風機２により昇圧ののち、空気予熱器３へ供給され
る。空気予熱器３の入側の空気温度が循環系５によって
上昇するため、空気予熱器３の出側の熱空気も上昇する
。したがって微粉炭に高湿分炭を用いた場合、循環系５
を機能させることにより、必要な温度の熱空気を供給す
ることができる。A part of the hot air in the ventilation system IA is sent to the inlet side of the primary ventilation fan 2 via the circulation system 5, mixed with cold air, and after being pressurized by the primary ventilation fan 2, is supplied to the air preheater 3. be done. Since the air temperature on the inlet side of the air preheater 3 is increased by the circulation system 5, the hot air on the outlet side of the air preheater 3 is also increased. Therefore, when high humidity coal is used as pulverized coal, the circulation system 5
By operating this function, hot air at the required temperature can be supplied.
第２図は本発明の第２実施例を示す系統図である。本実
施例が前記実施例と異なるところは、熱空気の増り込み
位置を通風系２Ａにした点にある。FIG. 2 is a system diagram showing a second embodiment of the present invention. This embodiment differs from the previous embodiments in that the hot air increases in the ventilation system 2A.
前記実施例と同様に通風系ＩＡの熱空気温度を上昇させ
ることができる。As in the previous embodiment, the temperature of the hot air in the ventilation system IA can be increased.
さらに、第３図は本発明の第３実施例を示す系統図であ
る。本実施例は第５図の構成に対応するもので、通風系
ＩＡと微粉炭機４の間に一次通風機２を配設し、通風系
２Ａを除去した構成に対し、通風系ＩＡと押込通風機１
との間に循環系５及びダンパ６を設けろようにしたとこ
ろに特徴がある。Furthermore, FIG. 3 is a system diagram showing a third embodiment of the present invention. This embodiment corresponds to the configuration shown in FIG. 5, in which the primary ventilation fan 2 is disposed between the ventilation system IA and the pulverizer 4, and the ventilation system 2A is removed. Ventilator 1
The feature is that a circulation system 5 and a damper 6 are provided between the two.
この構成では、空気予熱器３０入・出力系を１つにでき
るので、空気予熱器の低温端メタル温度を全体的に上昇
し、空気予熱器エレメントの腐食防止を図れる利点があ
る。With this configuration, since the air preheater 30 input/output system can be integrated into one, there is an advantage that the temperature of the low-temperature end metal of the air preheater can be increased as a whole, and corrosion of the air preheater element can be prevented.
以上説明した通り、本発明によれば、空気予熱器より出
力される予熱空気の一部を前記空気予熱器の入側へ循環
させる熱空気再循環系を設けたので、微粉炭機の入口熱
空気温度を高湿分の石炭が要求する熱空気温度にするこ
とができる。As explained above, according to the present invention, since a hot air recirculation system is provided that circulates a part of the preheated air output from the air preheater to the inlet side of the air preheater, the inlet heat of the pulverizer is The air temperature can be brought to the hot air temperature required by high humidity coal.
第１図は本発明による微粉炭燃焼装置の一実施例を示す
系統図、第２図及び第３図は本発明の第２及び第３の実
施例を示す系統図、第４図及び第５図は従来の微粉炭燃
焼装置の２例を示す系統図である。
１・・・・・・押込通風機、２・・・・・・−次通風機
、３・・・・・・空気予熱器、４・・・・・・微粉炭機
、５・・・・・・循環系、６．７・・・・・・ダンパ
８・・ｅ・・・バイパスダンパ。
第１図
第２図
第３図FIG. 1 is a system diagram showing one embodiment of a pulverized coal combustion apparatus according to the present invention, FIGS. 2 and 3 are system diagrams showing second and third embodiments of the present invention, and FIGS. The figure is a system diagram showing two examples of conventional pulverized coal combustion equipment. 1... Forced draft fan, 2... - Secondary draft fan, 3... Air preheater, 4... Pulverized coal machine, 5... ...Circulatory system, 6.7...Damper
8...e...Bypass damper. Figure 1 Figure 2 Figure 3
Claims (1)
前記微粉炭機へ供給する空気予熱器と、該空気予熱器へ
昇圧空気を供給し或いは前記空気予熱器よりの予熱空気
を昇圧して前記微粉炭機へ供給する一次通風機とを備え
た微粉炭燃焼装置において、前記空気予熱器より出力さ
れる予熱空気の一部を前記空気予熱器の入側へ循環させ
る熱空気再循環系を設けたことを特徴とする微粉炭燃焼
装置。a pulverizer; an air preheater that supplies preheated air to the pulverizer using heat exchange of exhaust gas; and an air preheater that supplies pressurized air to the air preheater or pressurizes the preheated air from the air preheater. In the pulverized coal combustion apparatus, a part of the preheated air output from the air preheater is circulated to the inlet side of the air preheater in the pulverized coal combustion apparatus, which is provided with a primary draft fan which supplies the pulverized coal to the pulverized coal machine. A pulverized coal combustion device characterized by being equipped with a pulverized coal combustion system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63154887A JP2677825B2 (en) | 1988-06-24 | 1988-06-24 | Pulverized coal combustion equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63154887A JP2677825B2 (en) | 1988-06-24 | 1988-06-24 | Pulverized coal combustion equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH028610A true JPH028610A (en) | 1990-01-12 |
| JP2677825B2 JP2677825B2 (en) | 1997-11-17 |
Family
ID=15594130
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63154887A Expired - Lifetime JP2677825B2 (en) | 1988-06-24 | 1988-06-24 | Pulverized coal combustion equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2677825B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011140399A (en) * | 2010-01-05 | 2011-07-21 | General Electric Co <Ge> | Method and apparatus to transport solids |
| CN103868054A (en) * | 2014-04-04 | 2014-06-18 | 四川电力建设三公司 | Boiler starting speed increasing and oil-saving arrangement structure for heat power station and method for rapidly starting boiler |
| CN105135671A (en) * | 2015-09-10 | 2015-12-09 | 河南陆德筑机股份有限公司 | Multistage air distribution pulverized coal combustion hot blast stove |
| CN105987394A (en) * | 2015-03-02 | 2016-10-05 | 上海谊快能源技术有限公司 | Direct blowing type industrial powder combustion system |
| CN109268866A (en) * | 2018-09-06 | 2019-01-25 | 无锡戈滤科环境科技有限公司 | A kind of direct-firing pulverized coal combustion system of medium-speed pulverizer suitable for high-moisture coal |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101641666B1 (en) * | 2015-07-20 | 2016-07-21 | 오영찬 | A air preheating equipment for firing system of a coal-fired power boiler |
-
1988
- 1988-06-24 JP JP63154887A patent/JP2677825B2/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011140399A (en) * | 2010-01-05 | 2011-07-21 | General Electric Co <Ge> | Method and apparatus to transport solids |
| CN103868054A (en) * | 2014-04-04 | 2014-06-18 | 四川电力建设三公司 | Boiler starting speed increasing and oil-saving arrangement structure for heat power station and method for rapidly starting boiler |
| CN105987394A (en) * | 2015-03-02 | 2016-10-05 | 上海谊快能源技术有限公司 | Direct blowing type industrial powder combustion system |
| CN105135671A (en) * | 2015-09-10 | 2015-12-09 | 河南陆德筑机股份有限公司 | Multistage air distribution pulverized coal combustion hot blast stove |
| CN109268866A (en) * | 2018-09-06 | 2019-01-25 | 无锡戈滤科环境科技有限公司 | A kind of direct-firing pulverized coal combustion system of medium-speed pulverizer suitable for high-moisture coal |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2677825B2 (en) | 1997-11-17 |
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