JPS6370141A - Method of testing exhaust gas diffusion - Google Patents
Method of testing exhaust gas diffusionInfo
- Publication number
- JPS6370141A JPS6370141A JP21532986A JP21532986A JPS6370141A JP S6370141 A JPS6370141 A JP S6370141A JP 21532986 A JP21532986 A JP 21532986A JP 21532986 A JP21532986 A JP 21532986A JP S6370141 A JPS6370141 A JP S6370141A
- Authority
- JP
- Japan
- Prior art keywords
- height
- discharge
- rise
- discharge pipe
- flue gas
- 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
- 238000009792 diffusion process Methods 0.000 title claims description 15
- 238000010998 test method Methods 0.000 title claims description 3
- 239000000700 radioactive tracer Substances 0.000 claims abstract description 20
- 238000012360 testing method Methods 0.000 claims abstract description 11
- 239000007789 gas Substances 0.000 claims description 19
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 18
- 239000003546 flue gas Substances 0.000 claims description 18
- 239000000779 smoke Substances 0.000 abstract description 11
- 238000004088 simulation Methods 0.000 abstract 1
- 230000000630 rising effect Effects 0.000 description 13
- 238000005259 measurement Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012876 topography Methods 0.000 description 2
- 241000272201 Columbiformes Species 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000011144 upstream manufacturing Methods 0.000 description 1
Landscapes
- Aerodynamic Tests, Hydrodynamic Tests, Wind Tunnels, And Water Tanks (AREA)
Abstract
Description
【発明の詳細な説明】 〔産業上の利用分骨〕 本発明は排煙拡散試験法の改良に関する。[Detailed description of the invention] [Industrial use parts] The present invention relates to improvements in flue gas diffusion testing methods.
工場や発電所などの煙突を建設する場合には、大気汚染
の発生を防止するために地上での排煙の拡散濃度を予想
し、様々な対策２諾じている。When constructing chimneys for factories, power plants, etc., the diffusion concentration of exhaust smoke on the ground is estimated and various countermeasures are taken to prevent air pollution.
第２図と第３図に示すようにして行なわれる。This is done as shown in FIGS. 2 and 3.
風洞の測定室０１内には、図示しない送風機で発生され
、種々に変形する洞を通って整流でれ、また必要に応じ
て適度に乱された風０２が流されている。測定室０１内
には建屋模型ｏ３や地形模型０４が配設はれ、上流側か
らトレーサガス０５が吐出される。トレーサガス０５［
、逆り型の吐出管０６から吐出される訳であるが、吐出
管０６の先端を水平褐鳩下流側に向け、予２定の煙突高
さくＨｏ ）に排煙の上昇高さくΔＨ） ４加えた有効
煙突高さくＨｅ＝ｘＨｏ＋ΔＨ）の位置からトレーサガ
ス０５を吐出している。トレーサガス０５の風ｏ２によ
る拡散の状況は、地形模様０４の表面に変色塗料を塗っ
ておいたり、るるいは、ガスを吸引してその濃度を求め
たりして行っている。In the measurement chamber 01 of the wind tunnel, air 02 is generated by a blower (not shown), rectified through a tunnel that deforms in various ways, and is appropriately disturbed as necessary. A building model o3 and a terrain model 04 are arranged inside the measurement chamber 01, and a tracer gas 05 is discharged from the upstream side. Tracer gas 05 [
, the exhaust smoke is discharged from the reversed discharge pipe 06, but the tip of the discharge pipe 06 is directed toward the downstream side of the horizontal brown pigeon, and the rising height of the flue gas is increased to the predetermined chimney height Ho ) 4 The tracer gas 05 is discharged from the position of the added effective chimney height (He=xHo+ΔH). The state of diffusion of the tracer gas 05 by the wind O2 is determined by applying a color-changing paint to the surface of the topographical pattern 04, or by sucking the gas and determining its concentration.
逆り型の吐出管０６の高さＨｅの設定法について述べる
。A method of setting the height He of the inverted discharge pipe 06 will be described.
地面０１１に建った煙突０７（高さＨｏ）は、排煙を上
向きに上昇ブぜ、排煙）−ｎＯ８と１．て、ΔＨだけ上
昇し、風下に排煙拡散０９として流れて行く。このため
煙突高さＨＯと排煙上昇へＨの和は、有効煙突高さＨｅ
と呼ばれ、第３図に破線で図示する如（Ｈｅの高さにな
るように、逆り型の吐出管０６の先端高さを調節してい
る。The chimney 07 (height Ho) built on the ground 011 raises the exhaust smoke upwards, exhaust smoke) -nO8 and 1. Then, the smoke rises by ΔH and flows downwind as exhaust smoke diffusion 09. Therefore, the sum of the chimney height HO and the flue gas rise H is the effective chimney height He
The height of the tip of the inverted discharge pipe 06 is adjusted so that it reaches the height of He (as shown by the broken line in FIG. 3).
このようにして行なう排煙拡散試験において、吐出管０
６の風上側や、周囲に地形もしくは建物がある場合には
、排煙の上昇高さΔＨが地形影響を受けて平坦地のもの
と変ってくるのに、従来の方法では、変らないとして上
昇分を加えた高さＨｅの吐出管０６を用いているため、
試験精度が低下する不具合があった。In the flue gas diffusion test conducted in this way, the discharge pipe 0
On the windward side of 6, or when there are terrain or buildings in the surrounding area, the height ΔH of flue gas rise will be affected by the terrain and will differ from that of a flat area, but with the conventional method, the height ΔH of flue gas rises as if it were unchanged. Since the discharge pipe 06 with the height He added to the height is used,
There was a problem that the test accuracy decreased.
そこで本発明ではトレーサガスを吐出管から吐出する排
煙拡散試験法において、逆り型の吐出管を用いず、トレ
ーサガスの上昇高さがΔＨになるような上向き排煙の■
型の吐出管を用いるようにした。Therefore, in the present invention, in a flue gas diffusion test method in which tracer gas is discharged from a discharge pipe, an inverted discharge pipe is not used, and the upward flue gas is
A molded discharge pipe was used.
すなわち、先ず、風上および煙突周辺に地形および建物
が無い条件で煙突高さがＨｏのＩ型の吐出管から出るト
レーサガスの上昇高芒がΔ■（に、実用上一致するよう
なトレーサガスの吐出条件を見出す。That is, first, the tracer gas is selected such that the rising height of the tracer gas coming out of the I-shaped discharge pipe with a chimney height of Ho matches Δ■( under conditions where there are no topography or buildings upwind or around the chimney. Find out the discharge conditions.
次に、地形および建物を全部入れて、上記の吐出条件で
排煙拡散試験を行った。Next, a flue gas diffusion test was conducted under the above discharge conditions, including all terrain and buildings.
Ｉ型吐出管の吐出条件（吐出速度、吐出口形状、吐出密
度等）を変えて予め、トレーサガスの上昇高さΔＨ′ヲ
調べておく。このデータを用いて、所定の排煙上昇高さ
ムＨが与えられれば、ΔＨ＝ΔＨ′となるに必要な吐出
条件を選んで、Ｉ型吐出管（煙突高さＨｏ）を設置する
ので、地形などの影響で排煙の上昇高さΔＨが変わる時
の試験が出来る。The rising height ΔH' of the tracer gas is determined in advance by changing the discharge conditions (discharge speed, discharge port shape, discharge density, etc.) of the I-type discharge pipe. Using this data, if a predetermined flue gas rising height H is given, discharge conditions necessary for ΔH = ΔH' are selected and an I-type discharge pipe (chimney height Ho) is installed. Tests can be conducted when the height ΔH of flue gas changes due to the influence of topography, etc.
一般に工型吐出管からのトレーサガスの上昇高’ｇ（Ｈ
ｍ）Ｙ与える式としては、次のＢｏｓａｎｑｕｅｔ式（
実験式）がある。Generally, the rising height of tracer gas from the mold discharge pipe is 'g (H
m) The formula for giving Y is the following Bosanquet formula (
There is an experimental formula).
ここに、■：風洞内の風速
■ｇ：吐出管からのトレーサガスの
吐出速度
ＱＴ、 ：風洞気流温度Ｔ１に換算した吐出流量
吐出管の直径をＤ（円型）、吐出空
気の温度乞Ｔ、ｐとすると
以上より吐出管からのトレーサガスの上昇高ａ Ｈｍは
、吐出速度Ｖｇ、もしくは吐出口径Ｄ１もしくは吐出空
気の温度ＴＩ（密度にも換算できる）によって変えるこ
とが出来る。従って、排煙の上昇高さΔＨは、平坦地の
条件で、例えば現地実験式のＣ０Ｎ０ＡＷＥ式で与えら
れる。これより、縮尺模型の縮率によって、模型の排煙
の上昇高さΔＨが指定されるので、この上昇高さΔＨを
実用上一致する■型の吐出管の吐出条件？平坦地で見出
す。吐出管からのトレーサガスの上昇高さΔＨ′は吐出
速度、もしくは吐出口径（円型の場合）によって変わる
ので、予め上昇高さのｄａｔａを入手しておくと吐出条
件（ΔＨ−ΔＨ′）は直ぐに見出せる。Where, ■: Wind speed in the wind tunnel ■ g: Discharge speed of tracer gas from the discharge pipe QT, : Discharge flow rate converted to wind tunnel airflow temperature T1 The diameter of the discharge pipe is D (circular), and the temperature of the discharge air is T. , p. From the above, the rising height a Hm of the tracer gas from the discharge pipe can be changed by the discharge speed Vg, the discharge port diameter D1, or the temperature TI of the discharge air (which can also be converted into density). Therefore, the rising height ΔH of the flue gas is given by, for example, the C0N0AWE formula, which is an on-site experimental formula, under conditions of flat ground. From this, the rising height ΔH of the exhaust smoke in the model is specified by the reduction ratio of the scale model, so what are the discharge conditions for the ■-shaped discharge pipe that practically matches this rising height ΔH? Found on flat land. The rising height ΔH' of the tracer gas from the discharge pipe changes depending on the discharge speed or the diameter of the discharge port (in the case of a circular type), so if you obtain data on the rising height in advance, the discharge conditions (ΔH - ΔH') can be adjusted. You can find it right away.
第１図は本発明に係わる一実施例である排煙拡散試験状
況を示す側断面図である。トレーサガス５がＩ型の吐出
管６より、上記で見出した吐出条件で吐出される。その
他、測定室１内の状況は従来と同じである。すなわち、
符号１乃至５は第１図の符号０１乃至０５と均等物であ
る。また、拡散の状況も、従来と同様実施される。FIG. 1 is a side cross-sectional view showing an example of an exhaust gas diffusion test according to the present invention. The tracer gas 5 is discharged from the I-shaped discharge pipe 6 under the discharge conditions found above. Other than that, the situation inside the measurement chamber 1 is the same as before. That is,
Reference numbers 1 to 5 are equivalent to reference numbers 01 to 05 in FIG. Furthermore, the diffusion situation will be the same as before.
排煙拡散試験において、トレーサを上向きに吐出するＩ
型の吐出管とし、その上昇高さが平坦地時に与えられる
ΔＨに一致する吐出条件で、吐出管の風上側や、周囲に
地形もしくは建物がある場合にも、吐出されるので、地
形影響乞正しく受けてトレーサの上昇高さは平坦地のも
のと変ってくるので、正しい拡散試験がなされることに
なる等本発明は実験技術上有用なものである。In the flue gas diffusion test, the tracer is discharged upward.
type discharge pipe, and under the discharge condition that the rising height matches ΔH given on flat land, the discharge is possible even if there is terrain or buildings on the windward side of the discharge pipe or in the surrounding area, so there is no possibility of terrain influence. The present invention is useful in terms of experimental technology, such as correct diffusion testing, since the rising height of the tracer will be different from that on flat ground if it is received correctly.
第１図は本発明に係わる一実施例を示す側断面図である
。
第２図は従来例を示す側断面図である。
第３図は排煙上昇高きΔＨの置換法の説明図である。
１・・・風洞の測定室、２・・・風、３・・・建屋模型
、４・・・地形模型、５・・・トレーサガス、６・・・
吐出管。FIG. 1 is a side sectional view showing one embodiment of the present invention. FIG. 2 is a side sectional view showing a conventional example. FIG. 3 is an explanatory diagram of a method of replacing the exhaust gas rise height ΔH. 1...Wind tunnel measurement room, 2...Wind, 3...Building model, 4...Terrain model, 5...Tracer gas, 6...
discharge pipe.
Claims (1)
する排煙拡散試験において、上記トレーサガスの上昇高
さが、平地時に与えられる排煙の上昇高さに加えて実際
に一致するような上昇高さを加えた吐出条件を予め見出
した後で、上記吐出管の周辺の地形地物を入れたのち、
上記吐出条件で排煙拡散試験を行うことを特徴とする排
煙拡散試験法。In a flue gas diffusion test in which tracer gas is discharged upward from an I-type discharge pipe, the height of rise of the tracer gas is increased to match the height of rise of flue gas given on flat ground in addition to the actual height of rise of flue gas. After finding the discharge conditions including the height in advance, and adding the topographical features around the discharge pipe,
A flue gas diffusion test method characterized by conducting a flue gas diffusion test under the above discharge conditions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21532986A JPH0615998B2 (en) | 1986-09-12 | 1986-09-12 | Flue gas diffusion test method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21532986A JPH0615998B2 (en) | 1986-09-12 | 1986-09-12 | Flue gas diffusion test method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6370141A true JPS6370141A (en) | 1988-03-30 |
| JPH0615998B2 JPH0615998B2 (en) | 1994-03-02 |
Family
ID=16670492
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21532986A Expired - Fee Related JPH0615998B2 (en) | 1986-09-12 | 1986-09-12 | Flue gas diffusion test method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0615998B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000055397A1 (en) * | 1999-03-16 | 2000-09-21 | Shin-Etsu Handotai Co., Ltd. | Production method for silicon wafer and silicon wafer |
-
1986
- 1986-09-12 JP JP21532986A patent/JPH0615998B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000055397A1 (en) * | 1999-03-16 | 2000-09-21 | Shin-Etsu Handotai Co., Ltd. | Production method for silicon wafer and silicon wafer |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0615998B2 (en) | 1994-03-02 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |