JPH0619558Y2 - Atmosphere adjusting device - Google Patents
Atmosphere adjusting deviceInfo
- Publication number
- JPH0619558Y2 JPH0619558Y2 JP13344988U JP13344988U JPH0619558Y2 JP H0619558 Y2 JPH0619558 Y2 JP H0619558Y2 JP 13344988 U JP13344988 U JP 13344988U JP 13344988 U JP13344988 U JP 13344988U JP H0619558 Y2 JPH0619558 Y2 JP H0619558Y2
- Authority
- JP
- Japan
- Prior art keywords
- furnace
- water
- flow rate
- heat
- steam
- 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 - Lifetime
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 49
- 238000001704 evaporation Methods 0.000 claims description 25
- 230000008020 evaporation Effects 0.000 claims description 22
- 230000001105 regulatory effect Effects 0.000 claims description 2
- 238000000137 annealing Methods 0.000 description 4
- 238000009833 condensation Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000011819 refractory material Substances 0.000 description 3
- 238000005261 decarburization Methods 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 101100298222 Caenorhabditis elegans pot-1 gene Proteins 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 238000004382 potting Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000008400 supply water Substances 0.000 description 1
Landscapes
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
- Furnace Housings, Linings, Walls, And Ceilings (AREA)
Description
【考案の詳細な説明】 〔産業上の利用分野〕 本考案は、炉内を高露点（水蒸気を多量に含ませる）と
して鋼材の脱炭等の弱酸化を行う連続焼鈍炉等の炉内の
雰囲気の調整装置に関する。[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a furnace such as a continuous annealing furnace that performs weak oxidation such as decarburization of steel with a high dew point (containing a large amount of water vapor) inside the furnace. Atmosphere adjusting device.
従来の連続焼鈍炉における炉内雰囲気調整装置を第２図
によつて説明する。従来の装置にあつては、炉内に水分
を供給するのに当つては、水蒸気の流量を計測して所定
流量の水分を炉内に供給していた。A furnace atmosphere adjusting device in a conventional continuous annealing furnace will be described with reference to FIG. In the case of the conventional apparatus, in supplying water into the furnace, the flow rate of water vapor was measured and a predetermined flow rate of water was supplied into the furnace.
第２図において、０１は炉体０２及び耐火材０３を貫通
して炉内に開口する水蒸気配管であり、同配管０１に
は、流量計０６及び同流量計０６の出力を受ける制御器
０７によつて制御される流量調整弁０４が設けられてい
る。同装置においては、水蒸気Ｓが流量調整弁０４によ
つて調整されて所定の流量で水蒸気配管０１を通つて炉
内に供給される。In FIG. 2, reference numeral 01 is a steam pipe that penetrates the furnace body 02 and the refractory material 03 and opens into the furnace. The pipe 01 includes a flow meter 06 and a controller 07 that receives the output of the flow meter 06. A flow rate adjusting valve 04 that is controlled accordingly is provided. In the same apparatus, the steam S is adjusted by the flow rate adjusting valve 04 and supplied at a predetermined flow rate into the furnace through the steam pipe 01.
また、炉に供給される雰囲気ガスを、炉外に設けられた
加湿気において、電気又はスチームヒータによつて加熱
された温水によつて加湿させた上、炉内に供給する方式
が特開昭54-45605号公報、特開昭59-1629号公報、実公
昭56-32509号公報等によつて提案されている。Further, there is a method in which the atmospheric gas supplied to the furnace is humidified by electric water or hot water heated by a steam heater in a humidified atmosphere provided outside the furnace and then supplied into the furnace. 54-45605, JP-A-59-1629, JP-B-56-32509, and the like.
上記第２図に示す従来の装置においては、炉内に供給さ
れる水蒸気Ｓの圧力は低圧でも３〜４kg/cm2Ｇ程度であ
り、その温度は１５０〜１８０℃程度であつた。このよ
うな水蒸気を使用する場合、水蒸気配管０１に保温材０
５を施して保温しなければ、放熱によつて水蒸気温度が
低下する。水蒸気の温度が、３kg/cm2Ｇの圧力の場合約
１４３℃に低下すると、また、４kg/cm2Ｇの圧力の場合
約１５１℃に低下すると凝縮が起り、第２図中に符号
Ｓ′に示すように水蒸気配管０１内に水分が付着する。
これが蓄積されると水蒸気流によつて同伴され炉内に流
入する。炉内に流入した水滴は炉内の熱によつて蒸発し
て水蒸気となる。In the conventional apparatus shown in FIG. 2, the pressure of the steam S supplied into the furnace was about 3 to 4 kg / cm 2 G even at a low pressure, and the temperature was about 150 to 180 ° C. When using such water vapor, the heat insulation material 0
If the temperature is not maintained by applying No. 5, the temperature of water vapor will decrease due to heat radiation. Condensation occurs when the temperature of the steam drops to about 143 ° C. at a pressure of 3 kg / cm 2 G and to about 151 ° C. at a pressure of 4 kg / cm 2 G, and condensation occurs, and the symbol S ′ in FIG. As shown in, water adheres to the inside of the steam pipe 01.
When it accumulates, it is entrained by the steam flow and flows into the furnace. The water droplets flowing into the furnace are vaporized by the heat in the furnace to become water vapor.
凝縮水はその体積は小さいが、炉内で蒸発するとその体
積は約1,000倍に増加するため、炉内露点、即ち水蒸気
体積濃度は大きく変動する。この現象は、大気温度、配
管内の凝縮水の蓄積状態当により大きく変化するため
に、予め予測して制御を行うことは困難であった。Condensed water has a small volume, but when it evaporates in the furnace, its volume increases about 1,000 times, so the dew point in the furnace, that is, the water vapor volume concentration, fluctuates greatly. This phenomenon greatly changes depending on the atmospheric temperature and the state of accumulation of condensed water in the pipe, so it is difficult to predict and control in advance.
また、水蒸気配管０１内で凝縮が起らないように保温材
０５を上記保温等に置換え外部から加熱する方法もとら
れるが、設備費、運転費が高くつくことになる。Also, a method of replacing the heat insulating material 05 with the above heat insulating material or the like so as to prevent condensation in the steam pipe 01 and heating from the outside can be used, but the equipment cost and the operating cost are high.
また、上記特開昭54-45605号公報、特開昭59-1629号公
報及び実公昭56-32509号公報に示された公知技術にあつ
ても、水蒸気を用いている点においては、上記第２図に
示す装置と同様の問題を抱えていると共に、ヒータ等を
備えた加湿器を炉外に設けなければならないという問題
点がある。Further, in the known techniques disclosed in JP-A-54-45605, JP-A-59-1629, and JP-B-56-32509, the above-mentioned first point is that steam is used. In addition to having the same problem as the device shown in FIG. 2, there is a problem in that a humidifier equipped with a heater and the like must be provided outside the furnace.
以上説明した問題点は、炉に水分を供給するために水蒸
気を用いていることに起因することに鑑み、本考案は水
蒸気に代えて水を供給して、上記問題点を解消しようと
するものである。In view of the fact that the problems described above are caused by the use of steam for supplying water to the furnace, the present invention aims to solve the above problems by supplying water instead of steam. Is.
本考案の炉内雰囲気調整装置は、炉の外壁部に設けられ
収容された水からの水蒸気を炉内に供給する蒸発ポツト
及び同蒸発ポツトに調整された流量の水を供給する水供
給手段を備えた。The in-furnace atmosphere adjusting device of the present invention comprises an evaporation pot which is provided on the outer wall of the furnace and which supplies water vapor from the water contained in the furnace to the inside of the furnace, and a water supply means which supplies the adjusted flow rate of water to the evaporation pot. Prepared
本考案は、蒸発ポツトに所定理量に調整された水が供給
され、この蒸発ポツト内の水は炉内の熱によつて蒸発さ
れ、所定流量の水蒸気が炉内に供給される。これによつ
て炉内の露点、即ち、水蒸気体積濃度が一定に保持され
る。According to the present invention, water adjusted to a predetermined amount is supplied to the evaporation pot, the water in the evaporation pot is evaporated by the heat in the furnace, and a predetermined amount of steam is supplied into the furnace. As a result, the dew point in the furnace, that is, the water vapor volume concentration is kept constant.
また、本考案では、蒸発ポツトが炉の外壁部に設けら
れ、炉内の熱によつて蒸発ポツト内の水が蒸発するため
に、水の加熱装置もしくは蒸発装置を炉外に設ける必要
がない。Further, in the present invention, since the evaporation pot is provided on the outer wall of the furnace and the water in the evaporation pot is evaporated by the heat in the furnace, it is not necessary to provide a water heating device or an evaporation device outside the furnace. .
本考案の一実施例としての連続焼鈍炉の炉内雰囲気調整
装置を第１図によつて説明する。連続焼鈍炉の外壁は炉
体２及び同炉体に内装された耐火材３によつて構成され
る。１３は炉の外壁に設けられた炉内に蒸発した水蒸気
を供給する蒸発ポツトであり、同蒸発ポツト１３には水
配管１の１端が接続されている。水配管１にはポンプ１
２、流量計６、及び同流量計６の出力を受ける制御器７
によつて制御される流量調整弁４が配設され、その他端
は水１０を貯えたタンク１１に接続されている。A furnace atmosphere adjusting device for a continuous annealing furnace as an embodiment of the present invention will be described with reference to FIG. The outer wall of the continuous annealing furnace is composed of the furnace body 2 and the refractory material 3 provided in the furnace body. An evaporation pot 13 is provided on the outer wall of the furnace for supplying vaporized water vapor to the inside of the furnace, and one end of the water pipe 1 is connected to the evaporation pot 13. Pump 1 for water pipe 1
2, the flow meter 6, and the controller 7 that receives the output of the flow meter 6
A flow rate adjusting valve 4 controlled by the above is provided, and the other end is connected to a tank 11 storing water 10.
本実施例では、タンク１１よりポンプ１２によつて吸引
された水は、流量調整弁４で流量が調整され、水配管１
内を流れて所定流量で蒸発ポツト１３に流入する。蒸発
ポツト１３に流入した水は炉内の熱によつて蒸発し、水
蒸気となつて炉内に供給され炉内ガスと混合する。In this embodiment, the flow rate of the water sucked from the tank 11 by the pump 12 is adjusted by the flow rate adjusting valve 4, and the water pipe 1
It flows through the inside and flows into the evaporation pot 13 at a predetermined flow rate. The water flowing into the evaporation pot 13 is evaporated by the heat in the furnace, becomes water vapor, is supplied into the furnace, and is mixed with the gas in the furnace.
このように、本実施例では、従来の装置のように水蒸気
の状態で炉に水分を供給せず、水の状態で蒸発ポツト１
３に所定流量で供給しこれを蒸発させて炉内に送つてい
るために、炉内露点を所定の値に保つことができる。本
実施例による実施例を以下に説明する。As described above, in this embodiment, unlike the conventional apparatus, water is not supplied to the furnace in the state of water vapor, and the evaporation pot 1 is used in the state of water.
The dew point in the furnace can be maintained at a predetermined value because the gas is supplied to No. 3 at a predetermined flow rate and evaporated to be sent into the furnace. An embodiment according to this embodiment will be described below.
炉内温度850℃，300Nm3/hの流量で露点50℃以下の炉内
ガスが流れる脱炭炉に、本実施例の装置を用いて200cc/
hの流量で水を蒸発ポツトに供給し、これを炉内の熱で
蒸発させて炉内に水蒸気を供給した。Furnace temperature 850 ° C., the decarburization furnace flows dew point 50 ° C. or less of the in-furnace gas at a flow rate of 300 Nm 3 / h, using the apparatus of this embodiment 200 cc /
Water was supplied to the evaporation pot at a flow rate of h, and this was evaporated by the heat in the furnace to supply steam into the furnace.
水流量の設定精度は±0.5％であり、ほゞこの精度に対
応して炉内露点を45℃±１℃に保持することができた。
この場合における蒸発に要する必要熱量は、理論的に 640Ｋｃｃ／kg×0.2kg≒130Ｋｃｃ／ｈ である。The accuracy of setting the water flow rate was ± 0.5%, and the dew point in the furnace could be maintained at 45 ° C ± 1 ° C, corresponding to this accuracy.
In this case, the required amount of heat required for evaporation is theoretically 640 Kcc / kg × 0.2 kg≈130 Kcc / h.
一方炉内で扱われている熱量は一般に100万Ｋｃａ／
ｈのオーダーであり、本実験例において水の蒸発に要す
る熱量は取扱熱量の1/10000程度にすぎない。On the other hand, the amount of heat handled in the furnace is generally 1 million Kca /
It is on the order of h, and the heat quantity required for water evaporation in this experimental example is only about 1/10000 of the heat quantity handled.
ちなみに、従来装置における配管に通常の保温を行つた
場合には、直径100mm，長さ１０ｍの水蒸気配管の場合
約200Ｋｃａ／ｈ程度の放熱があり、本実験例におけ
る必要熱量を上廻つていることになる。By the way, when the pipes in the conventional equipment are normally kept warm, there is a heat radiation of about 200 Kca / h in the case of a steam pipe with a diameter of 100 mm and a length of 10 m, which exceeds the required heat amount in this experimental example. Become.
以上説明したように、本実施例は、蒸発ポツト１３に流
量が調整された水を供給し、これを炉内の熱によつて蒸
発させることによつて、炉内露点を精度よく調整するこ
とができる。As described above, in the present embodiment, the dew point in the furnace is accurately adjusted by supplying the water having the adjusted flow rate to the evaporation pot 13 and evaporating the water by the heat in the furnace. You can
また、必要とする熱量も小さく、かつ、水の蒸発のため
の加熱装置、蒸発装置を炉外に設ける必要がなく、簡単
な構造の炉外壁部の蒸発ポツトによつて必要な水蒸気を
発生させることができ、設備費を低減させることができ
る。Further, the required amount of heat is small, and it is not necessary to provide a heating device and an evaporation device for evaporating water outside the furnace, and the necessary steam is generated by the evaporation pot on the outer wall of the furnace having a simple structure Therefore, the equipment cost can be reduced.
以上説明したように、本考案は蒸発ポツトに調整された
流量の水を供給し、これを炉内の熱によつて蒸発させて
炉内に水分を供給することによつて、炉内の露点を精度
よく調整することができる。As described above, according to the present invention, by supplying water with a regulated flow rate to the evaporation pot and evaporating the water by the heat in the furnace to supply water into the furnace, the dew point in the furnace is increased. Can be adjusted accurately.
また、本考案における必要熱量は少く、かつ簡単な構造
であつて、設備費及び運転費を低く抑えることができ
る。In addition, the present invention requires a small amount of heat and has a simple structure, so that the facility cost and the operating cost can be kept low.
第１図は本考案の一実施例の説明図、第２図は従来の炉
内雰囲気調整装置の説明図である。 １……水配管、２……炉体、３……耐火材、 ４……流量調整弁、１１……水タンク １２……ポンプ、１３……蒸発ポツト。FIG. 1 is an explanatory view of an embodiment of the present invention, and FIG. 2 is an explanatory view of a conventional furnace atmosphere adjusting device. 1 ... water piping, 2 ... furnace body, 3 ... refractory material, 4 ... flow rate adjusting valve, 11 ... water tank 12 ... pump, 13 ... evaporation pot.
───────────────────────────────────────────────────── フロントページの続き (72)考案者 米田 順吉 広島県広島市西区観音新町４丁目６番22号 三菱重工業株式会社広島製作所内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Junkichi Yoneda 4-6-22 Kannon Shinmachi, Nishi-ku, Hiroshima City, Hiroshima Prefecture Mitsubishi Heavy Industries Hiroshima Works
Claims (1)
水蒸気を炉内に供給する蒸発ポツト及び同蒸発ポツトに
調整された流量の水を供給する水供給手段を備えたこと
を特徴とする炉内雰囲気調整装置。1. An evaporation pot for supplying steam from water contained in an outer wall of the furnace to the inside of the furnace, and a water supply means for supplying a regulated flow rate of water to the evaporation pot. Atmosphere adjusting device in the furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13344988U JPH0619558Y2 (en) | 1988-10-14 | 1988-10-14 | Atmosphere adjusting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13344988U JPH0619558Y2 (en) | 1988-10-14 | 1988-10-14 | Atmosphere adjusting device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0253959U JPH0253959U (en) | 1990-04-18 |
| JPH0619558Y2 true JPH0619558Y2 (en) | 1994-05-25 |
Family
ID=31391318
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13344988U Expired - Lifetime JPH0619558Y2 (en) | 1988-10-14 | 1988-10-14 | Atmosphere adjusting device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0619558Y2 (en) |
-
1988
- 1988-10-14 JP JP13344988U patent/JPH0619558Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0253959U (en) | 1990-04-18 |
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