JPH022045B2 - - Google Patents
Info
- Publication number
- JPH022045B2 JPH022045B2 JP10571285A JP10571285A JPH022045B2 JP H022045 B2 JPH022045 B2 JP H022045B2 JP 10571285 A JP10571285 A JP 10571285A JP 10571285 A JP10571285 A JP 10571285A JP H022045 B2 JPH022045 B2 JP H022045B2
- Authority
- JP
- Japan
- Prior art keywords
- coal
- water slurry
- fuel
- slurry fuel
- fineness
- 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
Links
- 239000000446 fuel Substances 0.000 claims description 42
- 239000002002 slurry Substances 0.000 claims description 38
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 34
- 239000003245 coal Substances 0.000 claims description 28
- 238000000034 method Methods 0.000 claims description 6
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 4
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 238000002485 combustion reaction Methods 0.000 description 18
- 238000005516 engineering process Methods 0.000 description 2
- 238000001035 drying Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、未燃分及びNOxの発生を押えた石
炭水スラリー燃料の供給方法に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a method for supplying coal-water slurry fuel that suppresses the generation of unburned matter and NO x .
近年、安全上等の理由から、石炭を微粉化した
ものを水スラリー燃料としてスラリー燃料バーナ
に供給することにより燃焼を行わせることが種々
開発されている。
In recent years, for reasons such as safety, various methods have been developed to perform combustion by supplying pulverized coal as water slurry fuel to a slurry fuel burner.
従来、こうした石炭水スラリー燃料は、経験か
ら、炭種などに関係なく、次のような数値を目標
として製造、供給を行うようにしていた。 Conventionally, such coal-water slurry fuel has been manufactured and supplied with the following numerical targets as a target, regardless of coal type etc., based on experience.
濃 度 60〜70％
粘 度 1000cp程度
微粉度 70〜80％（200メツシユ通過パーセント
＝微粉炭焚の微粉度と同程度）
〔発明が解決しようとする問題点〕
しかし、上記従来技術においては、前記スラリ
ー燃料の供給条件が経験に基づいた大まかなもの
であり、且つ基準が確定されていないために、炭
種の変化やその他の条件の変化によつて未燃分の
発生やNOxの発生が、微粉炭焚（乾燥）の場合
に比べて増大してしまう問題を有していた。Concentration: 60-70% Viscosity: Approximately 1000 cp Fineness: 70-80% (200 mesh passage percentage = same level of fineness as pulverized coal) [Problems to be solved by the invention] However, in the above conventional technology, Since the slurry fuel supply conditions described above are rough based on experience and standards have not been established, changes in coal type and other conditions may cause the generation of unburned matter and NO x . However, the problem was greater than in the case of pulverized coal firing (drying).
本発明は、上記従来の問題点に着目してなした
もので、石炭水スラリー燃料を燃焼させた際の未
燃分の発生及びNOxの発生を微粉炭焚の場合と
同程度以下におさえることのできる石炭水スラリ
ーの供給方法を提供することを目的としている。 The present invention has been made by focusing on the above-mentioned conventional problems, and suppresses the generation of unburned matter and NO x when burning coal-water slurry fuel to the same level or lower than when burning pulverized coal. The purpose of the present invention is to provide a method for supplying coal-water slurry that can be used as a coal-water slurry.
本発明は、上記技術的課題を解決しようとした
もので、石炭水スラリー燃料を下記の条件
μ≦1510exp（−0.465FR）
ここで
μ：石炭水スラリー燃料の粘度cp
FR：原炭の燃料比
（FR＝固定炭素分／揮発分）
Ｆ≧15.5FR＋41.2
ここで
Ｆ：石炭水スラリー燃料中石炭の微粉度％（200
メツシユ通過％）
を満足する性状としてバーナに供給することを特
徴とする石炭水スラリー燃料の供給方法に係るも
のである。
The present invention is an attempt to solve the above-mentioned technical problem, and the coal-water slurry fuel is prepared under the following conditions μ≦1510exp (−0.465FR), where μ: viscosity of the coal-water slurry fuel cp FR: raw coal fuel ratio (FR=fixed carbon content/volatile content) F≧15.5FR+41.2 where F: fineness % of coal in coal-water slurry fuel (200
The present invention relates to a method for supplying coal-water slurry fuel to a burner with properties satisfying the mesh passing %).
従つて、本発明では、石炭水スラリー燃料の性
状を、式
μ≦1510exp（−0.465FR）
ここで
μ：石炭水スラリー燃料の粘度cp
FR：原炭の燃料比
（FR＝固定炭素分／揮発分）
Ｆ≧15.5FR＋41.2
ここで
Ｆ：石炭水スラリー燃料中石炭の微粉度％（200
メツシユ通過％）
を満足するようにして供給することにより、少な
くとも徴粉炭焚の燃焼性能と同等以上の性能が得
られる。
Therefore, in the present invention, the properties of the coal-water slurry fuel are expressed by the formula μ≦1510exp (−0.465FR), where μ: viscosity of the coal-water slurry fuel cp FR: raw coal fuel ratio (FR = fixed carbon content/volatile ) F≧15.5FR＋41.2 Where F: Fineness of coal in coal-water slurry fuel% (200
By supplying the fuel in a manner that satisfies the mesh passing percentage), it is possible to obtain combustion performance that is at least equivalent to or better than that of pulverized coal.
以下本発明の実施例を図面を参照しつつ説明す
る。
Embodiments of the present invention will be described below with reference to the drawings.
本発明者等は、種々の石炭水スラリー燃料の燃
焼試験の結果、石炭水スラリー燃料の燃焼性（未
燃分の発生、NOxの発生）は、炭種の他、スラ
リーとしたときの粘度、及び微粉度に大きく影響
されることを確かめた。 As a result of combustion tests of various coal-water slurry fuels, the present inventors found that the combustibility (generation of unburned matter, generation of NO , and it was confirmed that it is greatly influenced by the fineness.
第１図は、燃料比（FR）と、石炭水スラリー
燃料粘度（100sec-120℃）（cp）との関係を示
すグラフであり、図中ａ〜ｅは種々の炭種を示
し、又線１は原炭を微粉炭燃焼させたときの燃焼
性能と同等の燃焼性能を得られる石炭水スラリー
燃料の粘度を示すものであり、各炭種の燃焼試験
結果に斜線を施したものは、石炭水スラリーの燃
焼性能が微粉炭燃焼性能相当以下であることを示
している。従つて、第１図における線１より下側
になるように炭種に応じて石炭水スラリー燃料の
粘度を選定することにより、良好な燃焼を行うこ
とができる。 Figure 1 is a graph showing the relationship between fuel ratio (FR) and coal-water slurry fuel viscosity (100sec -1 20℃) (cp), in which a to e indicate various types of coal; Line 1 shows the viscosity of a coal-water slurry fuel that provides combustion performance equivalent to that obtained when raw coal is combusted with pulverized coal, and the combustion test results for each type of coal are shaded. This shows that the combustion performance of the coal-water slurry is lower than that of pulverized coal. Therefore, by selecting the viscosity of the coal-water slurry fuel according to the type of coal so as to be below line 1 in FIG. 1, good combustion can be achieved.
これを式で表わすと次のようになる。 This can be expressed as a formula as follows.
μ≦1510exp（−0.465FR）
ここで
μ：石炭水スラリー燃料の粘度cp
FR：原炭の燃料比
（FR＝固定炭素分／揮発分）
第２図は、燃料比（FR）と石炭水スラリー燃
料の微粉度（200メツシユ通過パーセント）との
関係を示すグラフであり、図中ｆは微粉炭燃焼、
ｇは高粘度スラリーの燃焼、ｈは低粘度スラリー
の燃焼、線２は微粉炭燃焼時の燃焼性能と同等の
燃焼性能が得られる石炭水スラリー燃料の微粉度
を示し、又斜線を施したものは石炭水スラリーの
燃焼性能が微粉炭の燃焼性相当以下であることを
示している。従つて第２図における線２より上側
になるように原炭の燃料比に応じて石炭水スラリ
ー燃料の微粉度を選定することにより、良好な燃
焼を行うことができる。 μ≦1510exp (−0.465FR) where μ: Viscosity of coal-water slurry fuel cp FR: Fuel ratio of raw coal (FR=fixed carbon content/volatile content) Figure 2 shows the fuel ratio (FR) and coal-water slurry. This is a graph showing the relationship between fuel fineness (200 mesh passing percentage), and f in the figure indicates pulverized coal combustion,
g indicates the combustion of high-viscosity slurry, h indicates the combustion of low-viscosity slurry, and line 2 indicates the fineness of the coal-water slurry fuel that provides combustion performance equivalent to that of pulverized coal combustion, and is shaded. shows that the combustion performance of the coal-water slurry is lower than that of pulverized coal. Therefore, by selecting the fineness of the coal-water slurry fuel in accordance with the fuel ratio of raw coal so as to be above line 2 in FIG. 2, good combustion can be achieved.
これを式で表わすと次のようになる。 This can be expressed as a formula as follows.
Ｆ≧15.5FR＋41.2
ここで
Ｆ：石炭水スラリー燃料中石炭の微粉度％（200
メツシユ通過パーセント）
以上の条件を満足するような性状の石炭水スラ
リー燃料を製造、供給して燃焼させることによ
り、同じ石炭を微粉炭燃焼した場合の未燃分及び
NOx値以下で石炭水スラリー燃料を燃焼させる
ことができる。 F≧15.5FR＋41.2 Where F: Fineness of coal in coal water slurry fuel% (200
By manufacturing, supplying and burning a coal-water slurry fuel with properties that satisfy the above conditions, the unburnt amount and
Coal-water slurry fuel can be combusted below the NO x value.
上記したように、本発明の石炭水スラリー燃料
の供給方法によれば、石炭水スラリー燃料の粘度
の上限及び微粉度の下限を設定して供給するよう
にしたことにより石炭水スラリー燃料の燃焼性能
を微粉炭燃焼性能と同等以上に保持させることが
できると共に、前記粘度及び微粉度の選定により
未燃分及びNOx値の制御を行わせることもでき
る優れた効果を奏し得る。
As described above, according to the method for supplying coal-water slurry fuel of the present invention, the upper limit of the viscosity and the lower limit of the fineness of the coal-water slurry fuel are set and supplied, thereby improving the combustion performance of the coal-water slurry fuel. It is possible to maintain the combustion performance of pulverized coal at a level equivalent to or higher than that of pulverized coal, and also to control the unburned content and NO x value by selecting the viscosity and fineness.
第１図は本発明を説明するための燃焼試験にお
ける燃料比と石炭水スラリー燃料の粘度との関係
を示すグラフ、第２図は燃焼試験における燃料比
と微粉度との関係を示すグラフである。
FIG. 1 is a graph showing the relationship between the fuel ratio and the viscosity of coal-water slurry fuel in a combustion test to explain the present invention, and FIG. 2 is a graph showing the relationship between the fuel ratio and fineness in the combustion test. .
Claims (1)
メツシユ通過％） を満足する性状としてバーナに供給することを特
徴とする石炭水スラリー燃料の供給方法。[Claims] 1 Coal-water slurry fuel under the following conditions μ≦1510exp (−0.465FR) where μ: Viscosity of coal-water slurry fuel cp FR: Fuel ratio of raw coal (FR = fixed carbon content/volatile content ) F≧15.5FR＋41.2 Where F: Fineness of coal in coal-water slurry fuel% (200
1. A method for supplying coal-water slurry fuel to a burner with properties that satisfy mesh passing %).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10571285A JPS61265408A (en) | 1985-05-17 | 1985-05-17 | Method of feeding coal-water slurry fuel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10571285A JPS61265408A (en) | 1985-05-17 | 1985-05-17 | Method of feeding coal-water slurry fuel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61265408A JPS61265408A (en) | 1986-11-25 |
| JPH022045B2 true JPH022045B2 (en) | 1990-01-16 |
Family
ID=14414947
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10571285A Granted JPS61265408A (en) | 1985-05-17 | 1985-05-17 | Method of feeding coal-water slurry fuel |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61265408A (en) |
-
1985
- 1985-05-17 JP JP10571285A patent/JPS61265408A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61265408A (en) | 1986-11-25 |
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