JPS6313467B2 - - Google Patents
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- Publication number
- JPS6313467B2 JPS6313467B2 JP17102681A JP17102681A JPS6313467B2 JP S6313467 B2 JPS6313467 B2 JP S6313467B2 JP 17102681 A JP17102681 A JP 17102681A JP 17102681 A JP17102681 A JP 17102681A JP S6313467 B2 JPS6313467 B2 JP S6313467B2
- Authority
- JP
- Japan
- Prior art keywords
- heat
- heat recovery
- recovery device
- medium particles
- introduction pipe
- 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
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- Coke Industry (AREA)
Description
【発明の詳細な説明】
本発明は、ガス導入管のデコーキングを図つた
コークス炉発生粗ガス（COG）の熱回収機構に
関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a heat recovery mechanism for coke oven generated crude gas (COG) for decoking a gas introduction pipe.
従来コークス炉炭化室で発生する600〜800℃の
COGは、発生と同時に安水（アンモニア含有水）
をスプレーしてCOG中のタールを凝縮補集する
とともに、約85℃に冷却していた。しかしこの方
法によれば、ガスの顕熱は有効に利用されていな
い。 The temperature of 600 to 800℃ generated in conventional coke oven carbonization chambers
At the same time as COG is generated, ammonium water (ammonia-containing water)
The COG was sprayed to condense and collect the tar in the COG, and was also cooled to approximately 85℃. However, according to this method, the sensible heat of the gas is not effectively utilized.
この点に鑑み本発明者らは、噴流層熱回収装置
を用いた顕熱の回収方法を先に提案した。この回
収方法は、噴流層熱回収装置内にCOGを導入し、
該熱回収装置内を循環する熱媒体粒子と熱交換
し、更にこの熱媒体粒子と伝熱管内の流体と熱交
換することにより、顕熱を回収する方法である。
この方法によれば、COG中の顕熱を有効に回収
することができる。 In view of this point, the present inventors previously proposed a sensible heat recovery method using a spouted bed heat recovery device. This recovery method introduces COG into a spouted bed heat recovery device,
This is a method of recovering sensible heat by exchanging heat with the heat medium particles circulating within the heat recovery device and further exchanging heat with the heat medium particles and the fluid in the heat transfer tube.
According to this method, sensible heat in COG can be effectively recovered.
しかしCOG中には、前述のようにベンゾール
類、等の低沸点物質や水分の他にタールピツチの
高沸点物質、及び溶媒不溶成分が多く含まれてい
る。このため400℃以上では熱回収装置までのガ
ス導入管にこれらが沈着し、いわゆるコーキング
現象が起る。その結果ガス導入管が閉塞し、安定
した長期運転が困難となる。 However, as mentioned above, in addition to low-boiling substances such as benzenes and water, COG contains many high-boiling substances such as tarpitz and solvent-insoluble components. For this reason, at temperatures above 400°C, these substances are deposited on the gas introduction pipe leading to the heat recovery device, causing a so-called coking phenomenon. As a result, the gas introduction pipe becomes clogged, making stable long-term operation difficult.
コーキングに対して従来は、熱回収を休止し、
発生COGを一旦バイパス回路に通して安水フラ
ツシング→冷却→精製工程へ吸引、圧送し、その
間にガス導入管中のコーキング物質を燃焼させて
管内をクリーニング（いわゆるデコーキング）し
ていた。このため従来は、その間の熱回収ができ
ないとともに、プラントの再始動に多大な労力を
必要とし、不経済であつた。 Conventionally, heat recovery was suspended for caulking,
The generated COG was first passed through a bypass circuit, then suctioned and pressured to the ammonium water flushing, cooling, and refining processes. During this time, the coking material in the gas introduction pipe was burned to clean the inside of the pipe (so-called decoking). For this reason, in the past, it was not possible to recover heat during that time, and restarting the plant required a great deal of effort, which was uneconomical.
この点に鑑み本発明者は、ガス導入管に付着す
るコーキング物の性状につき研究した。その結果
コーキング物は、すす状のふわふわした柔いもの
であり、ここに熱媒体粒子を通すと、極めて簡単
に除去できることが判明した。 In view of this point, the present inventor conducted research on the properties of the caulking material that adheres to the gas introduction pipe. As a result, it was found that the caulking material was fluffy and soft in the form of soot, and could be removed extremely easily by passing heat transfer particles through it.
本発明は、上記知見にもとづいてなされたもの
で、その目的とするところは、熱媒体粒子でガス
導入管に付着したコーキング物をデコーキングす
ることにより、COGの熱回収を途中で休止する
ことなく連続しておこなうことができるコークス
炉発生粗ガスの熱回収機構を得んとするものであ
る。 The present invention was made based on the above knowledge, and its purpose is to stop COG heat recovery midway through decoking the coking material adhering to the gas introduction pipe with heat medium particles. The purpose is to obtain a heat recovery mechanism for the crude gas generated in a coke oven that can be continuously operated without any heat recovery.
すなわち本発明は、コークス炉発生粗ガスをガ
ス導入管から噴流層熱回収装置に導入し、該熱回
収装置内で循環する熱媒体粒子と熱交換をおこな
うコークス炉発生粗ガスの熱回収機構において、
前記熱回収装置に連結されて該熱回収装置内の前
記熱媒体粒子の一部を抜取る手段と、前記ガス導
入管の入口部に設けられ抜取つた熱媒体粒子をこ
の入口部から所定量づつ投入して前記熱回収装置
に返送する手段と、前記熱回収装置の上部に取付
けられ該熱回収装置内の熱媒体粒子の背圧を検出
して検出信号を発し、この検出信号に基づいて前
記熱媒体粒子の抜取り量を制御するレベルコント
ロールとを具備することを特徴とするものであ
る。 That is, the present invention provides a heat recovery mechanism for coke oven generated crude gas that introduces the coke oven generated crude gas from a gas introduction pipe into a spouted bed heat recovery device and exchanges heat with heat carrier particles circulating within the heat recovery device. ,
a means connected to the heat recovery device for extracting a portion of the heat medium particles in the heat recovery device; and a means provided at an inlet of the gas introduction pipe to extract a predetermined amount of the extracted heat medium particles from the inlet. a means for supplying the heat medium and returning it to the heat recovery device; and a means attached to the upper part of the heat recovery device to detect the back pressure of the heat medium particles in the heat recovery device and generate a detection signal, and based on this detection signal, the The present invention is characterized by comprising a level control for controlling the amount of heat medium particles extracted.
以下本発明を図示する実施例を参照して説明す
る。コークス炉１で発生したCOGは、集気管２
からガス導入管３を通つて、噴流層タイプの熱回
収装置４に入る。熱回収装置４に入つたCOGは、
ドラフトチユーブ５内を上昇し、上部から排出さ
れて、次の冷却工程あるいは精製工程に導かれ
る。一方熱回収装置４内には、γ−アルミナ、α
アルミナ、砂等の熱媒体粒子８が入つており、
COGとともにドラフトチユーブ５内を上昇し、
このチユーブ５の上方に設けた粒子飛出防止板６
に当り、ドラフトチユーブ５の外側を下降し、熱
回収装置４内を循環する。従つてドラフトチユー
ブ５内の上昇時に、COGと熱媒体粒子８との間
で熱交換がなされ、下降時にこの熱媒体粒子８と
伝熱管７内を流れる流体との間で熱交換がなさ
れ、COGの顕熱が回収される。 The present invention will be described below with reference to illustrative embodiments. The COG generated in the coke oven 1 is transferred to the air collection pipe 2.
The gas passes through the gas introduction pipe 3 and enters a spouted bed type heat recovery device 4. The COG that has entered the heat recovery device 4 is
It rises in the draft tube 5, is discharged from the upper part, and is led to the next cooling step or purification step. On the other hand, in the heat recovery device 4, γ-alumina, α
Contains heat carrier particles 8 such as alumina and sand,
Rising inside draft tube 5 with COG,
A particle splash prevention plate 6 provided above the tube 5
At this time, it descends outside the draft tube 5 and circulates within the heat recovery device 4. Therefore, when rising in the draft tube 5, heat is exchanged between the COG and the heat medium particles 8, and when falling, heat is exchanged between the heat medium particles 8 and the fluid flowing in the heat transfer tube 7, and the COG sensible heat is recovered.
しかしてこの熱回収装置４には、下部に抜出管
９が取付けられ、タンク１０に接続している。抜
出管９には、ロータリバルブ１１が装着され、こ
のロータリバルブ１１は、レベルコントロール１
２により開閉動作が制御されている。レベルコン
トロール１２は、N2等の不活性ガスを用いて、
熱媒体粒子８の背圧を検出し、、熱媒体粒子８が
ドラフトチユーブ５の高さを越えないようにする
ものである。またタンク１０の下部には輸送管１
３を介して貯留タンク１４が接続している。この
貯留タンク１４には熱媒体粒子８が入つており、
その下部には投入管１５が取付けられ、前記ガス
導入管３の入口部に接続している。この投入管１
５は、ロータリバルブ１６を装着している。 However, the heat recovery device 4 has an extraction pipe 9 attached to its lower part and is connected to a tank 10 . A rotary valve 11 is attached to the extraction pipe 9, and this rotary valve 11 is connected to the level control 1.
The opening/closing operation is controlled by 2. The level control 12 uses an inert gas such as N2 ,
It detects the back pressure of the heat medium particles 8 and prevents the heat medium particles 8 from exceeding the height of the draft tube 5. Also, at the bottom of the tank 10 is a transport pipe 1.
A storage tank 14 is connected via 3. This storage tank 14 contains heat medium particles 8,
An input pipe 15 is attached to the lower part thereof and connected to the inlet of the gas introduction pipe 3. This input tube 1
5 is equipped with a rotary valve 16.
本発明では、ロータリバルブ１６を例えば１時
間〜24時間に１度と非常に短かいタイムサイクル
で開け、貯留タンク１４内の熱媒体粒子８をガス
導入管３の入口部に投入する。ここに投入された
熱媒体粒子８は、ここを流れるCOGにより、ガ
ス導入管３を通つて熱回収装置４に入る。ガス導
入管３を通る際、熱媒体粒子８は、ここに付着し
たコーキング物を除去し、いわゆるデコーキング
をおこなう。ここでガス導入管３に供給される熱
媒体粒子８は、ここを流れるCOGに対し10〜30
（Kg−熱媒体粒子）／（Kg−COG）が好適であ
る。またこの熱媒体粒子８によるデコーキングは
数分から数時間にわたつておこなわれる。 In the present invention, the rotary valve 16 is opened in a very short time cycle, for example, once every 1 hour to 24 hours, and the heat medium particles 8 in the storage tank 14 are introduced into the inlet of the gas introduction pipe 3. The heat medium particles 8 introduced here enter the heat recovery device 4 through the gas introduction pipe 3 due to the COG flowing there. When passing through the gas introduction pipe 3, the heat transfer medium particles 8 remove the caulking substances adhering thereto, thereby performing so-called decoking. Here, the heat medium particles 8 supplied to the gas introduction pipe 3 are 10 to 30% of the COG flowing there.
(Kg-heat carrier particles)/(Kg-COG) is suitable. Further, this decoking by the heat medium particles 8 is performed over a period of several minutes to several hours.
熱回収装置４内では、ガス導入管３のデコーキ
ング期間中は、熱媒体粒子８が次々に供給される
ため、熱媒体粒子レベルが上昇する。そこでレベ
ルコントロール１２によりこれを検出して、適宜
ロータリバルブ１１を開き、熱回収装置４内の熱
媒体粒子８の一部をタンク１０内に送る。タンク
１０に送られた熱媒体粒子８は、不活性ガス等の
気体輸送により輸送管１３から貯留タンク１４に
送られる。 In the heat recovery device 4, during the decoking period of the gas introduction pipe 3, the heating medium particles 8 are supplied one after another, so that the level of the heating medium particles increases. Therefore, the level control 12 detects this, opens the rotary valve 11 as appropriate, and sends a part of the heat medium particles 8 in the heat recovery device 4 into the tank 10. The heat medium particles 8 sent to the tank 10 are sent to the storage tank 14 from the transport pipe 13 by gas transportation such as inert gas.
このようにしてタンク１４に熱媒体粒子８を供
給して、ガス導入管３内に投入するので、熱回収
装置４の運転中にガス導入管３のデコーキングを
おこなうことができる。 Since the heat medium particles 8 are supplied to the tank 14 and introduced into the gas introduction pipe 3 in this manner, the gas introduction pipe 3 can be decoked while the heat recovery device 4 is in operation.
ここでデコーキング完了の目安は、ガス導入管
３の入口圧力P1と熱回収装置４の入力圧力P2と
の差圧ΔP＝P1−P2によつて判定する。 Here, the completion of decoking is determined based on the differential pressure ΔP=P 1 -P 2 between the inlet pressure P 1 of the gas introduction pipe 3 and the input pressure P 2 of the heat recovery device 4.
次に本発明の具体例につき説明する。 Next, specific examples of the present invention will be explained.
コークス炉から発生するCOG（300Nm3／ｈ）
を6B×20ｍのガス導入管から噴流層熱回収装置に
導入して熱回収する際に、２〜４mmφのγ−アル
ミナの熱媒体粒子を８時間ごとに約10分間、熱媒
体粒子とCOGの比10Kg／Kgで、投入してデコー
キングをおこなつた。 COG generated from coke oven (300Nm 3 /h)
When introducing COG into a spouted bed heat recovery device through a 6 B × 20 m gas introduction pipe and recovering heat, γ-alumina heat carrier particles with a diameter of 2 to 4 mm are mixed with the heat carrier particles for about 10 minutes every 8 hours. The ratio was 10Kg/Kg, and decoking was performed.
この結果、100時間の運転で噴流層入口圧力が
−20mmAqで、ほとんど問題なく運転できること
が確認された。 As a result, it was confirmed that the spouted bed inlet pressure was -20 mmAq after 100 hours of operation, and the system could be operated without any problems.
これに対し熱媒体粒子をガス導入管に供給しな
い場合、10時間の運転で噴流層入口圧力が−500
mmAqまで上昇し、連続運転が困難となつた。 On the other hand, when heat carrier particles are not supplied to the gas introduction pipe, the spouted bed inlet pressure decreases to -500 after 10 hours of operation.
It rose to mmAq, making continuous operation difficult.
以上の如く本発明によれば、熱交換に用いられ
る熱媒体粒子を用いてガス導入管のデコーキング
をおこなうので、連続運転が可能となり、COG
の顕熱を有効に回収できるとともに経済的な操業
をおこなうことができる。 As described above, according to the present invention, since the gas introduction pipe is decoked using heat medium particles used for heat exchange, continuous operation is possible, and COG
Sensible heat can be effectively recovered and the operation can be carried out economically.
図面は本発明に係るコークス炉発生粗ガスの熱
回収機構の一例を示す説明図である。
１……コークス炉、２……集気管、３……ガス
導入管、４……熱回収装置、５……ドラフトチユ
ーブ、６……粒子飛出防止板、７……伝熱管、８
……熱媒体粒子、９……抜出管、１０……タン
ク、１１……ロータリバルブ、１２……レベルコ
ントロール、１３……輸送管、１４……貯留タン
ク、１５……投入管、１６……ロータリバルブ。
The drawing is an explanatory view showing an example of a heat recovery mechanism for coke oven generated crude gas according to the present invention. 1... Coke oven, 2... Air collecting pipe, 3... Gas introduction pipe, 4... Heat recovery device, 5... Draft tube, 6... Particle splash prevention plate, 7... Heat transfer tube, 8
... Heat medium particles, 9 ... Extraction pipe, 10 ... Tank, 11 ... Rotary valve, 12 ... Level control, 13 ... Transport pipe, 14 ... Storage tank, 15 ... Input pipe, 16 ... ...Rotary valve.
Claims (1)
層熱回収装置に導入し、該熱回収装置内で循環す
る熱媒体粒子と熱交換をおこなうコークス炉発生
粗ガスの熱回収機構において、前記熱回収装置に
連結されて該熱回収装置内の前記熱媒体粒子の一
部を抜取る手段と、前記ガス導入管の入口部に設
けられ抜取つた熱媒体粒子をこの入口部から所定
量づつ投入して前記熱回収装置に返送する手段
と、前記熱回収装置の上部に取付けられ該熱回収
装置内の熱媒体粒子の背圧を検出して検出信号を
発し、この検出信号に基づいて前記熱媒体粒子の
抜取り量を制御するレベルコントロールとを具備
することを特徴とするコークス炉発生粗ガスの熱
回収機構。1 In a heat recovery mechanism for coke oven generated crude gas which introduces coke oven generated crude gas from a gas introduction pipe into a spouted bed heat recovery device and exchanges heat with heat carrier particles circulating within the heat recovery device, the heat recovery a means connected to the apparatus for extracting a part of the heat medium particles in the heat recovery apparatus; and a means provided at the inlet of the gas introduction pipe for introducing a predetermined amount of the extracted heat medium particles from the inlet. a means for returning the heat medium to the heat recovery device; and a means attached to the upper part of the heat recovery device to detect the back pressure of the heat medium particles in the heat recovery device and generate a detection signal, and based on the detection signal, the heat medium particles are returned to the heat recovery device. A heat recovery mechanism for crude gas generated in a coke oven, characterized by comprising a level control for controlling the amount of extracted gas.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17102681A JPS5871983A (en) | 1981-10-26 | 1981-10-26 | Heat recovery from crude coke oven gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17102681A JPS5871983A (en) | 1981-10-26 | 1981-10-26 | Heat recovery from crude coke oven gas |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5871983A JPS5871983A (en) | 1983-04-28 |
| JPS6313467B2 true JPS6313467B2 (en) | 1988-03-25 |
Family
ID=15915705
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17102681A Granted JPS5871983A (en) | 1981-10-26 | 1981-10-26 | Heat recovery from crude coke oven gas |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5871983A (en) |
-
1981
- 1981-10-26 JP JP17102681A patent/JPS5871983A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS5871983A (en) | 1983-04-28 |
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