JPH0613711B2 - Pyrolysis gas cooling device - Google Patents
Pyrolysis gas cooling deviceInfo
- Publication number
- JPH0613711B2 JPH0613711B2 JP6487286A JP6487286A JPH0613711B2 JP H0613711 B2 JPH0613711 B2 JP H0613711B2 JP 6487286 A JP6487286 A JP 6487286A JP 6487286 A JP6487286 A JP 6487286A JP H0613711 B2 JPH0613711 B2 JP H0613711B2
- Authority
- JP
- Japan
- Prior art keywords
- pyrolysis gas
- pipe
- pyrolysis
- cooling
- gas introduction
- 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
- 238000000197 pyrolysis Methods 0.000 title claims description 78
- 238000001816 cooling Methods 0.000 title claims description 40
- 238000010438 heat treatment Methods 0.000 claims description 10
- 229930195733 hydrocarbon Natural products 0.000 claims description 8
- 150000002430 hydrocarbons Chemical class 0.000 claims description 8
- 239000004215 Carbon black (E152) Substances 0.000 claims description 6
- 239000002826 coolant Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 20
- 229920006395 saturated elastomer Polymers 0.000 description 14
- 238000005235 decoking Methods 0.000 description 9
- 230000000171 quenching effect Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000001556 precipitation Methods 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 239000000571 coke Substances 0.000 description 2
- 238000010791 quenching Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 230000008646 thermal stress Effects 0.000 description 2
- 150000001336 alkenes Chemical class 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000004939 coking Methods 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000012774 insulation material Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 230000009897 systematic effect Effects 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
Landscapes
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は熱分解ガス冷却装置に関し、さらに詳しくは炭
化水素の熱分解ガスを効率よく冷却し、かつ熱分解炉の
デコーキングが容易な熱分解ガス冷却装置に関するもの
である。Description: TECHNICAL FIELD The present invention relates to a pyrolysis gas cooling device, and more particularly to a thermal decomposition gas for efficiently decomposing a pyrolysis gas of hydrocarbons and easily decoking the pyrolysis furnace. The present invention relates to a cracked gas cooling device.
（従来の技術） 従来、炭化水素の熱分解反応により得られた高温の熱分
解ガスを急冷し、生成したオレフィン類を副反応による
損失を可及的に少なくして回数する熱分解ガス冷却装置
が知られている。このような冷却装置においては、熱分
解ガスのための加熱部と熱分解ガスの冷却部との間に熱
応力がかかるために、このような熱応力を除去する工夫
がなされ、一方、高温熱分解ガス中の重質分が凝縮、縮
合してコークスを生成し、熱分解ガス冷却管内を閉塞し
て熱分解ガスの運転の継続が不可能になることから、し
ばしばコークスの除去、すなわちデコーキングが行なわ
れている。そしてこのデコーキングを熱分解ガス炉の運
転を停止せずに行なうことが課題となっている。(Prior Art) Conventionally, a pyrolysis gas cooling device that rapidly cools a high-temperature pyrolysis gas obtained by a pyrolysis reaction of hydrocarbons, and reduces the generated olefins by reducing side loss as much as possible It has been known. In such a cooling device, since thermal stress is applied between the heating part for the pyrolysis gas and the cooling part for the pyrolysis gas, it is devised to remove such thermal stress. Heavy components in the cracked gas are condensed and condensed to generate coke, and the pyrolysis gas cooling pipe is clogged, making it impossible to continue the operation of the cracked gas. Is being carried out. The problem is to perform this decoking without stopping the operation of the pyrolysis gas furnace.
特公昭５７−５９８８０号公報には、第３図に示すよう
に、熱分解ガス冷却炉１の各加熱管の上部に急冷装置３
を直結した熱分解ガス冷却装置が知られている。第３図
において、４は気水分離ドラム、５は高圧飽和水降水
管、６は高圧飽和水入口管寄せ、７は急冷された熱分解
ガスの出口管寄せ、９は高圧飽和水上昇管、１０は高圧
飽和水蒸気管、１１は高圧水供給管である。In Japanese Patent Publication No. 57-59880, a quenching device 3 is provided above each heating pipe of a pyrolysis gas cooling furnace 1 as shown in FIG.
There is known a pyrolysis gas cooling device that is directly connected to the above. In FIG. 3, 4 is a steam separation drum, 5 is a high-pressure saturated water precipitation pipe, 6 is a high-pressure saturated water inlet pipe, 7 is an outlet pipe for quenched pyrolysis gas, 9 is a high-pressure saturated water rise pipe, 10 is a high pressure saturated steam pipe, and 11 is a high pressure water supply pipe.
（発明が解決しようとする問題点） しかしながら、上記従来装置においては、熱分解ガスは
急冷装置３の中心部の熱媒体流入管によって内部から冷
却されるのみで急冷効果が不十分であり、また冷却装置
の外側からのヒートロスが大きいという欠点がある。(Problems to be Solved by the Invention) However, in the above conventional apparatus, the pyrolysis gas is only cooled from the inside by the heat medium inflow pipe in the central portion of the quenching device 3, and the quenching effect is insufficient, and There is a drawback that the heat loss from the outside of the cooling device is large.
本発明の目的は、従来技術の欠点を解消し、急冷効果が
大きく、かつヒートロスを低減した熱分解ガス冷却装置
を提供することにある。An object of the present invention is to provide a pyrolysis gas cooling device that solves the drawbacks of the prior art, has a large quenching effect, and reduces heat loss.
（問題点を解決するための手段） 本発明は、多管式炭化水素熱分解炉の各加熱管の上部に
直結された第１の熱分解ガス導入管と、該熱分解ガス導
入管の中央部に挿入された第１の熱分解ガス冷却管と、
前記第１の熱分解ガス導入管の外側に同心状に設けた第
２の熱分解ガス導入管と、前記第１および第２の熱分解
ガス導入管の間に挿入された第２の熱分解ガス冷却管と
からなり、前記第１および第２の熱分解ガス冷却管はそ
れぞれ下端が閉塞され、かつ該閉塞された下端付近に開
口する冷却媒体流入管を内蔵し、前記第２の熱分解ガス
導入管は上部で第１の熱分解ガス導入管と連通し、かつ
下部に冷却された熱分解ガスの出口を有することを特徴
とする。(Means for Solving Problems) The present invention relates to a first pyrolysis gas introduction pipe directly connected to an upper portion of each heating pipe of a multi-tubular hydrocarbon pyrolysis furnace, and a center of the pyrolysis gas introduction pipe. A first pyrolysis gas cooling pipe inserted in the section,
A second pyrolysis gas introduction pipe concentrically provided outside the first pyrolysis gas introduction pipe, and a second pyrolysis inserted between the first and second pyrolysis gas introduction pipes. A gas cooling pipe, each of the first and second pyrolysis gas cooling pipes has a closed lower end, and has a built-in cooling medium inflow pipe open to the vicinity of the closed lower end; The gas introduction pipe is characterized in that it communicates with the first pyrolysis gas introduction pipe at the upper portion and has an outlet for the cooled pyrolysis gas at the lower portion.
以下、本発明を図面により更に詳細に説明する。Hereinafter, the present invention will be described in more detail with reference to the drawings.
（実施例） 第１図は、本発明の一実施例を示す熱分解ガス冷却装置
の系統図、第２図は該冷却装置の詳細図である。図にお
いて、この装置は、多管式炭化水素熱分解炉１の各加熱
管２の上部に直結された第１の熱分解ガス導入管１２
と、該熱分解ガス導入管１２を中央部に挿入された第１
の熱分解ガス冷却管１４と、前記第１の熱分解ガス導入
管１２の外側に同心状に設けられた第２の熱分解ガス導
入管３０と、前記第１および第２の熱分解ガス導入管の
間に挿入された第２の熱分解ガス冷却管２９とからな
り、前記第１および第２の熱分解ガス冷却管１４、２９
はそれぞれ下端が閉塞され、かつ該閉塞された下端付近
に開口する冷却媒体（高圧飽和水）流入管１６、２８を
内蔵し、前記第２の熱分解ガス導入管３０は上部で第１
の熱分解ガス導入管１２と連通し、かつ下部に冷却され
た熱分解ガスの出口１３を有するものである。(Embodiment) FIG. 1 is a system diagram of a pyrolysis gas cooling device showing an embodiment of the present invention, and FIG. 2 is a detailed view of the cooling device. In the figure, this device is provided with a first pyrolysis gas introduction pipe 12 directly connected to an upper portion of each heating pipe 2 of a multitubular hydrocarbon pyrolysis furnace 1.
And the first pyrolysis gas introduction pipe 12 inserted in the central portion
Of the pyrolysis gas cooling pipe 14, a second pyrolysis gas introduction pipe 30 concentrically provided outside the first pyrolysis gas introduction pipe 12, and the first and second pyrolysis gas introductions. A second pyrolysis gas cooling pipe 29 inserted between the pipes, and said first and second pyrolysis gas cooling pipes 14, 29.
Each have a lower end closed, and a cooling medium (high-pressure saturated water) inflow pipes 16 and 28 that open near the closed lower end are built-in.
It is connected to the pyrolysis gas introduction pipe 12 and has an outlet 13 for the cooled pyrolysis gas in the lower part.
上記達成の装置において、熱分解ガスは加熱管２から導
入され、第１の熱分解ガス導入管１２の内部を上昇する
間に急冷され、上端の連通部で方向転換して第２の熱分
解ガス導入管３０を下方に流れ、該導入管内の冷却管２
８によりさらに冷却され、下部のガス出口１３から排出
され、熱分解ガスの出口管寄せ７を通して外部に導出さ
れる。熱回収系としては気水分離ドラム（ボイラー）４
の下部の高圧飽和水降水管５から高圧飽和水入口管寄せ
６、管６Ａおよび６Ｂを介してそれぞれ第１の熱分解ガ
ス導入管内の高圧飽和水導入管１６および２８に高圧飽
和水が供給され、熱分解ガスの冷却媒体として使用され
る。高圧飽和水流入管１６内を下降した水はその下端の
流出口１７および２２で方向転換して前記管の外側を上
昇し、その上部で管外に出て管８Ａおよび８Ｂから高圧
水蒸気出口管寄せ８（第１図）に至り、さらに高圧水蒸
気上昇管９を通って前記気水ドラム４の気相側に戻され
る。なお、この際前記高圧飽和水に管２４Ａおよび２４
Ｂからそれぞれ低圧スチームが供給され、冷却媒体の温
度調整に使用される。In the apparatus of the above-mentioned achievement, the pyrolysis gas is introduced from the heating pipe 2, is rapidly cooled while rising inside the first pyrolysis gas introduction pipe 12, and is redirected at the communication portion at the upper end to perform the second pyrolysis. The cooling pipe 2 in the introduction pipe flows downward through the gas introduction pipe 30.
It is further cooled by 8, is discharged from the lower gas outlet 13, and is discharged to the outside through the outlet port 7 for the pyrolysis gas. Air-water separation drum (boiler) 4 as a heat recovery system
High-pressure saturated water is supplied from the high-pressure saturated-water precipitation pipe 5 in the lower part of the column to the high-pressure saturated-water inlet pipes 16 and 28 in the first pyrolysis gas inlet pipe via the high-pressure saturated water inlet header 6 and pipes 6A and 6B, respectively. , Used as a cooling medium for pyrolysis gas. The water descending in the high pressure saturated water inflow pipe 16 changes its direction at the outlets 17 and 22 at the lower end thereof, rises outside the pipe, and goes out of the pipe at the upper part thereof and comes out of the pipes 8A and 8B to the high pressure steam outlet pipe. 8 (FIG. 1), and further is returned to the gas phase side of the steam / water drum 4 through the high-pressure steam rising pipe 9. At this time, pipes 24A and 24 are added to the high-pressure saturated water.
Low-pressure steam is supplied from each of B and used for adjusting the temperature of the cooling medium.
上記実施例によれば、第１の熱分解ガス導入管１２の回
りに第２の熱分解ガス導入管３０を設け、第１の冷却管
１４の冷却効果に加えてさらにその外側の熱分解ガス導
入管３０内に設けられた冷却管２９により冷却されるの
で、急冷効果が大となり、また第１の熱分解ガス導入管
１２は第２の熱分解ガス導入管３０によりその外側を保
護された形になるので、高温の第１の熱分解管１２から
のヒートロスを最小限にすることができる。According to the above-described embodiment, the second pyrolysis gas introduction pipe 30 is provided around the first pyrolysis gas introduction pipe 12, and in addition to the cooling effect of the first cooling pipe 14, the pyrolysis gas on the outside thereof is further provided. Since it is cooled by the cooling pipe 29 provided in the introduction pipe 30, the rapid cooling effect is large, and the outer side of the first pyrolysis gas introduction pipe 12 is protected by the second pyrolysis gas introduction pipe 30. Since it is shaped, heat loss from the high temperature first pyrolysis tube 12 can be minimized.
上記装置において、冷却部のデコーキングを行なう場合
には、熱分解炉の加熱を継続したまま、原料の炭化水素
の代わりに空気を送入することにより、オンライン・デ
コーキングを行なうことができる。また第１の熱分解ガ
ス導入管１２のデコーキングは、冷却媒体の供給を停止
してから、熱分解炉内の加熱管２のデコーキングと同時
にコークスを燃焼除去して行なうことができる。このよ
うにオンライン・デコーキングにより、熱分解炉の加
熱、冷却の繰り返し頻度が大幅に減少するので、熱分解
装置の長寿命化を図ることができる。In the above apparatus, when decoking the cooling unit, online decoking can be performed by feeding air instead of the hydrocarbon as the raw material while continuing to heat the pyrolysis furnace. The decoking of the first pyrolysis gas introduction pipe 12 can be performed by stopping the supply of the cooling medium and then burning and removing coke at the same time as the decoking of the heating pipe 2 in the pyrolysis furnace. As described above, the online decoking significantly reduces the frequency of repeating the heating and cooling of the pyrolysis furnace, so that the life of the pyrolysis apparatus can be extended.
（発明の効果） 本発明によれば、熱分解ガスを内側からのみならず、外
側からも冷却可能な構造としたので、最大の急冷効果を
得ることができる。このため、一般に二次クエンチャー
は不要である。また本発明装置は、第１の熱分解ガス流
入管内のオンラインデコーキングが容易であり、気水ド
ラム４の水を抜くことなく、減圧のみの操作で、例えば
１０ｋｇ／cm2程度のスチームを回収しながらデコーキ
ングすることができる。本発明装置は、特に小容量の分
解ガスの冷却に最適であり、また第２の熱分解ガス導入
管３０の先端におけるガス温度が低いために熱分解ガス
冷却装置の応力差によるトラブルは極めて少なくなる。
なお、伝熱管はフィン付き伝熱管を必ずしも用いる必要
はなく、ベアー伝熱管で十分である。(Effect of the Invention) According to the present invention, since the pyrolysis gas is cooled not only from the inside but also from the outside, the maximum quenching effect can be obtained. Therefore, a secondary quencher is generally unnecessary. Further, the apparatus of the present invention is easy to perform online decoking in the first pyrolysis gas inflow pipe, and recovers, for example, about 10 kg / cm 2 of steam by only depressurizing without draining water from the steam drum 4. You can do decoking while you. The device of the present invention is particularly suitable for cooling a small volume of cracked gas, and since the gas temperature at the tip of the second cracked gas introduction pipe 30 is low, trouble due to the stress difference of the cracked gas cooling device is extremely small. Become.
The heat transfer tube need not necessarily be a finned heat transfer tube, and a bare heat transfer tube is sufficient.
本発明は、重質油等の熱分解ガスのみならず、ＬＰＧ分
解ガス等の冷却にも適用することができる。ＬＰＧ分解
の場合ガス入口部のみにコーキングするため、ガス入口
部におけるスムースなガス流れおよび充分なガス通過面
積をもたせることができる。INDUSTRIAL APPLICABILITY The present invention can be applied not only to thermally decomposed gas such as heavy oil but also to cooling of LPG decomposed gas. In the case of LPG decomposition, coking is performed only at the gas inlet portion, so that a smooth gas flow and a sufficient gas passage area can be provided at the gas inlet portion.
第１図は、本発明が適用される熱分解ガス冷却装置の全
体の系統図、第２図は本発明の熱分解ガス冷却装置の一
実施例を示す断面図、第３図は、従来の熱分解ガス冷却
装置の全体を示す系統図である。 １……炭化水素熱分解用加熱炉、２……炭化水素熱分解
用加熱管、３……熱分解ガス冷却装置、４……気水分離
ドラム、５……高圧飽和水降水管、６……高圧飽和水入
口管寄せ、６Ａ、６Ｂ……高圧飽和水入口管、７……急
冷された熱分解ガスの出口管寄せ、８……高圧水蒸気出
口管寄せ、８Ａ、８Ｂ……高圧水蒸気出口管、１２……
第１の熱分解ガス導入管、１３……冷却熱分解ガスの出
口、１４……第１の熱分解ガス冷却管、１６……第１の
高圧飽和水流入管、１９……断熱材、２０……熱分解ガ
ス冷却管の閉塞端、２８……第２の高圧飽和水流入管。FIG. 1 is an overall system diagram of a pyrolysis gas cooling device to which the present invention is applied, FIG. 2 is a sectional view showing an embodiment of the pyrolysis gas cooling device of the present invention, and FIG. It is a systematic diagram which shows the whole pyrolysis gas cooling device. 1 ... Heating furnace for hydrocarbon pyrolysis, 2 ... Heating tube for hydrocarbon pyrolysis, 3 ... Pyrolysis gas cooling device, 4 ... Steam separation drum, 5 ... High-pressure saturated water precipitation pipe, 6 ... ... High-pressure saturated water inlet pipe, 6A, 6B ... High-pressure saturated water inlet pipe, 7 ... Quenched pyrolysis gas outlet pipe, 8 ... High-pressure steam outlet pipe, 8A, 8B ... High-pressure steam outlet Tube, 12 ...
First pyrolysis gas introduction pipe, 13 ... Cooling pyrolysis gas outlet, 14 ... First pyrolysis gas cooling pipe, 16 ... First high-pressure saturated water inflow pipe, 19 ... Insulation material, 20 ... ... closed end of pyrolysis gas cooling pipe, 28 ... second high-pressure saturated water inflow pipe.
Claims (1)
に直結された第１の熱分解ガス導入管と、該熱分解ガス
導入管の中央部に挿入された第１の熱分解ガス冷却管
と、前記第１の熱分解ガス導入管の外側に同心状に設け
た第２の熱分解ガス導入管と、前記第１および第２の熱
分解ガス導入管の間に挿入された第２の熱分解ガス冷却
管とからなり、前記第１および第２の熱分解ガス冷却管
はそれぞれ下端が閉塞され、かつ該閉塞された下端付近
に開口する冷却媒体流入管を内蔵し、前記第２の熱分解
ガス導入管は上部で第１の熱分解ガス導入管と連通し、
かつ下部に冷却された熱分解ガスの出口を有することを
特徴とする熱分解ガス冷却装置。1. A first pyrolysis gas introduction pipe directly connected to an upper portion of each heating pipe of a multitubular hydrocarbon pyrolysis furnace, and a first heat inserted in a central portion of the pyrolysis gas introduction pipe. Inserted between the cracked gas cooling pipe, a second cracked gas introduction pipe concentrically provided outside the first cracked gas introduction pipe, and the first and second cracked gas introduction pipes. And a second pyrolysis gas cooling pipe, each of the first and second pyrolysis gas cooling pipes has a closed lower end, and has a cooling medium inflow pipe that opens near the closed lower end. The second pyrolysis gas introduction pipe communicates with the first pyrolysis gas introduction pipe at an upper portion,
A pyrolysis gas cooling device having an outlet for the cooled pyrolysis gas in the lower part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6487286A JPH0613711B2 (en) | 1986-03-25 | 1986-03-25 | Pyrolysis gas cooling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6487286A JPH0613711B2 (en) | 1986-03-25 | 1986-03-25 | Pyrolysis gas cooling device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62223294A JPS62223294A (en) | 1987-10-01 |
| JPH0613711B2 true JPH0613711B2 (en) | 1994-02-23 |
Family
ID=13270655
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6487286A Expired - Lifetime JPH0613711B2 (en) | 1986-03-25 | 1986-03-25 | Pyrolysis gas cooling device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0613711B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108993353B (en) * | 2018-06-14 | 2024-03-26 | 浙江工业大学 | Concentric ring hypergravity rotating bed with cooling type centrifugal liquid ring dynamic sealing device |
| WO2022060631A1 (en) * | 2020-09-18 | 2022-03-24 | Dhf America Llc | Waste treatment system and method using energy recirculation techniques |
-
1986
- 1986-03-25 JP JP6487286A patent/JPH0613711B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62223294A (en) | 1987-10-01 |
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