JPS6346384A - Scrap preheating method by furnace exhaust gas - Google Patents
Scrap preheating method by furnace exhaust gasInfo
- Publication number
- JPS6346384A JPS6346384A JP19107886A JP19107886A JPS6346384A JP S6346384 A JPS6346384 A JP S6346384A JP 19107886 A JP19107886 A JP 19107886A JP 19107886 A JP19107886 A JP 19107886A JP S6346384 A JPS6346384 A JP S6346384A
- Authority
- JP
- Japan
- Prior art keywords
- exhaust gas
- scrap
- deodorizer
- preheating
- concentration
- 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.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims description 10
- 229930195733 hydrocarbon Natural products 0.000 claims description 16
- 150000002430 hydrocarbons Chemical class 0.000 claims description 16
- 235000019645 odor Nutrition 0.000 claims description 16
- 239000000126 substance Substances 0.000 claims description 10
- 239000003344 environmental pollutant Substances 0.000 claims description 2
- 231100000719 pollutant Toxicity 0.000 claims description 2
- 239000007921 spray Substances 0.000 description 13
- 239000004215 Carbon black (E152) Substances 0.000 description 10
- 239000000428 dust Substances 0.000 description 8
- 238000005507 spraying Methods 0.000 description 8
- 230000001877 deodorizing effect Effects 0.000 description 7
- 239000003795 chemical substances by application Substances 0.000 description 6
- 238000002485 combustion reaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000003472 neutralizing effect Effects 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000002781 deodorant agent Substances 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 239000003921 oil Substances 0.000 description 1
- 235000014593 oils and fats Nutrition 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
Landscapes
- Furnace Details (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は、スクラップ（屑鉄）を原料にして鋼を製造す
る工業炉の排熱利用によるスクラップの予熱方法に関す
る。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a method for preheating scrap by utilizing the exhaust heat of an industrial furnace for manufacturing steel using scrap (scrap iron) as a raw material.
［従来の技術］
一般に、炉排ガスを利用してスクラップの予熱を行なう
と、スクラップに付着していた油脂分や混入していたプ
ラスデック、化学繊維、ゴム等が燃焼して、悪臭を発生
し臭気公害を引き起こす。[Conventional technology] Generally, when scrap is preheated using furnace exhaust gas, oils and fats adhering to the scrap and mixed plastic deck, chemical fibers, rubber, etc. are burned, producing a bad odor. Causes odor pollution.
従来、これを防ｌＩ：、する一方法として、スクラップ
予熱装置通過後の臭気を含んだ排ガスを大気に放散する
前に中和脱臭剤を噴霧して臭気成分を取り除くようにし
た方法が知られている。Conventionally, one known method to prevent this is to spray a neutralizing deodorizer to remove odor components from the odor-laden exhaust gas that has passed through the scrap preheating device before dissipating it into the atmosphere. ing.
［発明が解決しようとする問題点］
ところで、スクラップ中の油、ゴム、その他の高分子化
学物質などが、分解蒸発して悪臭を発生する時期及びそ
の程度は、スクラップ中に含まれる量、付着場所、分布
状況、並びに予熱装置に導入される排ガスの温度により
大きく変化する。[Problems to be Solved by the Invention] By the way, the timing and degree at which oil, rubber, and other polymeric chemicals in scrap decompose and evaporate and generate a bad odor depend on the amount contained in the scrap and the adhesion. It varies greatly depending on the location, distribution, and temperature of the exhaust gas introduced into the preheating device.
したがって、予熱装置の運転中に常時一定遺の中和脱臭
剤を噴霧しつづけろ従来の方法は、極めて不経済である
。一方、臭気の発生量に対して脱臭剤の噴７Ｊｇ’２が
少ないとその効果ら少なく、適切な制御が望まれていた
。Therefore, the conventional method of continuously spraying a constant amount of neutralizing deodorizing agent while the preheating device is in operation is extremely uneconomical. On the other hand, if the amount of deodorizing agent sprayed 7Jg'2 is small relative to the amount of odor generated, the effect will be small, and appropriate control has been desired.
本発明は、経済的かつ効率良く公害を防止するスクラッ
プ予熱方法を提供することを目的とする。An object of the present invention is to provide a scrap preheating method that is economical and efficient and prevents pollution.
［問題点を解決するための手段］
一般にスクラップを予熱した場合に発生する臭気等の公
害成分は、排ガス中の炭化水素濃度を監視することによ
り、その発生状況を把握できるこ□ とが実証され
ている。[Means to solve the problem] It has been demonstrated that the occurrence of pollution components such as odors that are generally generated when scrap is preheated can be ascertained by monitoring the concentration of hydrocarbons in the exhaust gas. ing.
そこで、本発明は、予熱装置通過後の排ガス中の炭化水
素濃度を検出して、その濃度に応じて脱臭剤等の公害成
分除去物質の投入量を制御するようにしたことを特徴と
している。Therefore, the present invention is characterized in that the concentration of hydrocarbons in the exhaust gas after passing through the preheating device is detected, and the amount of a pollutant component removing substance such as a deodorizer is controlled in accordance with the detected concentration.
［作用コ
臭気対策として脱臭剤を噴霧する場合を例にとって説明
すると、本発明においては、排ガス中の炭化水素濃度が
、ある設定値より大きくなったら脱臭剤の噴霧を開始す
る。そして、炭化水素濃度が低いとき脱臭剤噴霧量を少
なく、同濃度が高いとき噴霧量を増し、炭化水素濃度に
応じて噴霧量を増減さ仕る。そうすることにより、適ｍ
の脱臭剤によって排ガス中の臭気が除去される。また、
炭化水素濃度が、前記設定値より低いときには、脱臭剤
の噴霧を中止する。[Effects] Taking the case of spraying a deodorizer as a countermeasure against odor as an example, in the present invention, spraying of the deodorizer is started when the concentration of hydrocarbons in the exhaust gas becomes higher than a certain set value. Then, when the hydrocarbon concentration is low, the amount of deodorizer sprayed is reduced, and when the same concentration is high, the amount of sprayed is increased, and the amount of sprayed is increased or decreased depending on the hydrocarbon concentration. By doing so,
The odor in the exhaust gas is removed by the deodorizer. Also,
When the hydrocarbon concentration is lower than the set value, spraying of the deodorizer is stopped.
［実施例］ 以下、本発明の一実施例を第１図を参照して説明する。[Example] An embodiment of the present invention will be described below with reference to FIG.
まず、図に示すスクラップ予熱設備について述べると、
符号ｌはスクラップ溶解炉等の工業炉である。この工業
炉ｌの排ガスは、燃焼塔２に送られてここで可燃成分が
燃焼させられた後、集塵装置３、集塵ファン４を介して
煙突５に送られ、ここから大気に放散される。First, let's talk about the scrap preheating equipment shown in the figure.
The symbol l is an industrial furnace such as a scrap melting furnace. The exhaust gas from this industrial furnace 1 is sent to a combustion tower 2 where combustible components are burned, and then sent to a chimney 5 via a dust collector 3 and a dust collection fan 4, from where it is released into the atmosphere. Ru.
上記の排気ラインを主排気ライン６とすると、この主排
気ライン６の燃焼塔２と集塵装置３との間には、スクラ
ップ予熱室７に燃焼塔２からの排ガスを導入して再び主
排気ライン６に帰還させる予熱ライン８が併設されてい
る。９は主排気ライン６中に介在された流量調整用ダン
パ、１Ｏ１１１は予熱ライン８中の予熱室７の前後に配
された流量調整用ダンパである。Assuming that the above exhaust line is the main exhaust line 6, between the combustion tower 2 and the dust collector 3 in the main exhaust line 6, the exhaust gas from the combustion tower 2 is introduced into the scrap preheating chamber 7, and then the main exhaust A preheating line 8 that returns to the line 6 is also provided. Reference numeral 9 denotes a flow rate regulating damper interposed in the main exhaust line 6, and 1O111 denotes a flow rate regulating damper disposed before and after the preheating chamber 7 in the preheating line 8.
また、前記煙突５には、排ガスを大気に放散する際併せ
て脱臭剤を噴霧する脱臭剤噴霧装置１２が設けられてい
る。この場合の脱臭剤は、排ガスに含まれる臭気を取り
除くためのものであり、噴霧調節バルブＩ３により噴霧
量を制御できるようになっている。１４は脱臭剤供給ラ
インである。Further, the chimney 5 is provided with a deodorizer spraying device 12 that sprays a deodorizer at the same time as exhaust gas is diffused into the atmosphere. The deodorizer in this case is for removing the odor contained in the exhaust gas, and the amount of spray can be controlled by the spray control valve I3. 14 is a deodorizer supply line.
さらに、この設備では、予熱室７を通過後の排ガス中の
炭化水素濃度を検出するための検出器【５が煙突５の前
段に介在されている。検出器１５の検出値は、比較器Ｉ
６を介して脱臭剤噴霧運転制御装置１８に人力されてい
る。そして、この制御装置１８により、検出器１５の検
出結果に応じて、噴霧調節バルブ１３、主排気ラインの
ダンパ９、及び予熱室８の前後のダンパｌ０１ＩＩを調
節する構成になっている。Further, in this equipment, a detector [5] for detecting the concentration of hydrocarbons in the exhaust gas after passing through the preheating chamber 7 is interposed at the front stage of the chimney 5. The detected value of the detector 15 is determined by the comparator I
6 to the deodorizer spray operation control device 18. The control device 18 is configured to adjust the spray control valve 13, the damper 9 of the main exhaust line, and the dampers 101II before and after the preheating chamber 8 in accordance with the detection result of the detector 15.
この設備においては、次のように本発明の方法が実施さ
れる。In this equipment, the method of the present invention is carried out as follows.
まず、工業炉ｌからの排ガスは燃焼塔２に送られ、ここ
で可燃成分が燃焼される。その後、高温の排ガスは、予
熱室７に、あるいは集塵装置３に直接送られる。予熱室
７を経由する排ガスは、予熱室７でスクラップを予熱し
た後、集塵装置３に直接向かう高温の排ガスと合流さけ
られて希釈されながら集塵装置３に送られる。この場合
、集塵装置３に直接送られる排ガスの量と、予熱室７を
経由させられる排ガスの爪は、ダンパ９．１Ｏ１１１に
よって調節される。First, the exhaust gas from the industrial furnace 1 is sent to the combustion tower 2, where combustible components are combusted. Thereafter, the high temperature exhaust gas is sent to the preheating chamber 7 or directly to the dust collector 3. The exhaust gas passing through the preheating chamber 7 preheats the scrap in the preheating chamber 7, and then is sent to the dust collector 3 while being diluted by being combined with the high temperature exhaust gas heading directly to the dust collector 3. In this case, the amount of exhaust gas sent directly to the dust collector 3 and the amount of exhaust gas sent via the preheating chamber 7 are adjusted by the damper 9.1O111.
集塵装置３に送られた排ガスは、ついで煙突５に送られ
て大気に放散されるが、その前段階で、排ガス中の炭化
水素濃度が検出器Ｉ５により監視されている。すなわち
、比較器１６において、その検出濃度と、噴霧運転条件
として予め設定した濃度が比較されている。そして、排
ガス濃度が噴霧開始濃度に達すると、制御装置１７によ
り脱臭剤噴霧装置１２の調節バルブ１３が開かれる。The exhaust gas sent to the dust collector 3 is then sent to the chimney 5 and released into the atmosphere, but before that, the concentration of hydrocarbons in the exhaust gas is monitored by the detector I5. That is, in the comparator 16, the detected concentration is compared with a concentration preset as the spray operation condition. When the exhaust gas concentration reaches the spray start concentration, the control valve 13 of the deodorizer spraying device 12 is opened by the control device 17.
調節バルブ１３が開かれると、煙突５内の排ガスに脱臭
剤が噴霧され、排ガス中の臭気が除去されて大気に放散
される。噴霧調節バルブ１３は、炭化水素濃度によりそ
の開度が調節され、脱臭剤の噴霧量が増減させられる。When the control valve 13 is opened, the deodorizing agent is sprayed onto the exhaust gas in the chimney 5, and the odor in the exhaust gas is removed and released into the atmosphere. The opening degree of the spray control valve 13 is adjusted depending on the hydrocarbon concentration, and the spray amount of the deodorizer is increased or decreased.
したがって、必要最小限の量の脱臭剤で臭気の除去が行
なわれる。Therefore, the odor is removed using the minimum necessary amount of deodorizing agent.
また、この設備では、もし万一、脱臭能力以上の濃度の
排ガスが発生した場合には、直ちにダンパｌ０１１１が
閉じて予熱運転が中止される。Furthermore, in this equipment, if exhaust gas with a concentration higher than the deodorizing capacity is generated, the damper l0111 is immediately closed and the preheating operation is stopped.
そして、排ガス中の炭化水素濃度が予め設定された値よ
りも低い値となった場合には、噴霧調節バルブ１３が閉
じられて噴霧が停止される。When the hydrocarbon concentration in the exhaust gas becomes lower than a preset value, the spray control valve 13 is closed to stop spraying.
以上のように、上記の予熱方法によれば、必要最小限の
量の脱臭剤で臭気の除去が行なイつれる。As described above, according to the above preheating method, odor can be removed using the minimum necessary amount of deodorizing agent.
したがって、脱臭剤の無駄がなく経済的である。Therefore, the deodorizer is not wasted and is economical.
また、この方法では、炭化水素濃度が極めて高くなった
場合には、予熱運転を中止する。このため、公害の発生
を確実に防止することができる。Furthermore, in this method, if the hydrocarbon concentration becomes extremely high, the preheating operation is stopped. Therefore, the occurrence of pollution can be reliably prevented.
なお、上記の炭化水素濃度の上限設定値は、煙突５の高
さ等による臭気の拡散、希釈効果および周囲の環境条件
などにより決定すればよい。The upper limit setting value of the hydrocarbon concentration may be determined based on the diffusion of odor due to the height of the chimney 5, the dilution effect, the surrounding environmental conditions, etc.
また、本発明は、脱臭剤の噴霧場所及び炭化水素濃度の
検出場所について、上記の例に限られる乙のではない。Furthermore, the present invention is not limited to the above-mentioned example regarding the location where the deodorizer is sprayed and the location where the hydrocarbon concentration is detected.
さらに、上記実施例では公害除去のために投入する物質
として脱臭剤を用いる場合を説明したが、公害成分を除
去できる物質であれば他のものを用いてらよい。Further, in the above embodiment, a case was described in which a deodorizing agent was used as a substance to be added to remove pollution, but other substances may be used as long as they can remove pollution components.
［発明の効果］
以上説明したように、本発明の炉排ガスによるスクラッ
プ予熱方法によれば、排ガス中の炭化水素濃度に応じて
脱臭剤等の公害成分除去物質の投入量を制御するので、
脱臭剤等の公害成分除去物質の使用量を必要最小限に抑
えることができ、経済的であるととらに、適量の脱臭剤
等の公害成分除去物質を投入することができるので臭気
等の公害を確実に防止できる。[Effects of the Invention] As explained above, according to the scrap preheating method using furnace exhaust gas of the present invention, the amount of polluting component removing substances such as deodorizers is controlled according to the hydrocarbon concentration in the exhaust gas.
It is possible to reduce the amount of pollution component removal substances such as deodorizers used, which is not only economical, but also reduces pollution such as odors because an appropriate amount of pollution component removal substances such as deodorants can be used. can be reliably prevented.
第１図は本発明を実施し得るに好適な設備の一実施例の
系統図である。
■・・・・・・工業炉、５・・・・・・煙突、７・・・
・・・予熱室、１２・・・・・・脱臭剤噴霧装置、１３
・・・・・噴霧調節バルブ、１５・・・・・・炭化水素
濃度検出器、１６・・・・・比較器、１７・・・・・・
脱臭剤噴霧運転制御装置。FIG. 1 is a system diagram of an embodiment of equipment suitable for carrying out the present invention. ■...Industrial furnace, 5...Chimney, 7...
... Preheating chamber, 12 ... Deodorizer spraying device, 13
...Spray control valve, 15...Hydrocarbon concentration detector, 16...Comparator, 17...
Deodorizer spray operation control device.
Claims (1)
装置通過後の臭気等の公害成分を含んだ排ガスを大気に
放散するにあたり、脱臭剤等の公害成分除去物質を投入
して臭気等を除去するようにしたスクラップの予熱方法
において、前記予熱装置通過後の排ガス中の炭化水素濃
度を検出して、その濃度に応じて脱臭剤等の公害成分除
去物質の投入量を制御することを特徴とする炉排ガスに
よるスクラップ予熱方法。High-temperature exhaust gas from the furnace is guided to the scrap preheating device, and after passing through the preheating device, the exhaust gas containing polluting components such as odors is released into the atmosphere, and a substance that removes polluting components such as a deodorizer is added to remove odors. The method for preheating scrap as described above is characterized in that the concentration of hydrocarbons in the exhaust gas after passing through the preheating device is detected, and the amount of a pollutant component removing substance such as a deodorizer is controlled depending on the concentration. Scrap preheating method using furnace exhaust gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19107886A JPS6346384A (en) | 1986-08-14 | 1986-08-14 | Scrap preheating method by furnace exhaust gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19107886A JPS6346384A (en) | 1986-08-14 | 1986-08-14 | Scrap preheating method by furnace exhaust gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6346384A true JPS6346384A (en) | 1988-02-27 |
Family
ID=16268497
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19107886A Pending JPS6346384A (en) | 1986-08-14 | 1986-08-14 | Scrap preheating method by furnace exhaust gas |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6346384A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01155195A (en) * | 1987-12-11 | 1989-06-19 | Daido Steel Co Ltd | Deodorizing method in preheating of scrap |
| US6445593B1 (en) | 1999-08-19 | 2002-09-03 | Murata Manufacturing Co., Ltd. | Chip electronic component and method of manufacturing the same |
-
1986
- 1986-08-14 JP JP19107886A patent/JPS6346384A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01155195A (en) * | 1987-12-11 | 1989-06-19 | Daido Steel Co Ltd | Deodorizing method in preheating of scrap |
| US6445593B1 (en) | 1999-08-19 | 2002-09-03 | Murata Manufacturing Co., Ltd. | Chip electronic component and method of manufacturing the same |
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