JPS5883090A - Generation of steam in ethylene manufacture - Google Patents
Generation of steam in ethylene manufactureInfo
- Publication number
- JPS5883090A JPS5883090A JP56179794A JP17979481A JPS5883090A JP S5883090 A JPS5883090 A JP S5883090A JP 56179794 A JP56179794 A JP 56179794A JP 17979481 A JP17979481 A JP 17979481A JP S5883090 A JPS5883090 A JP S5883090A
- Authority
- JP
- Japan
- Prior art keywords
- steam
- bottoms
- dilution
- supplied
- compressor
- 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
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P30/00—Technologies relating to oil refining and petrochemical industry
- Y02P30/40—Ethylene production
Landscapes
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、エチレン製造において蒸留塔等の缶出液の廃
熱を回収して水蒸気を製造させる方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing steam by recovering waste heat from bottoms of a distillation column or the like in ethylene production.
従来のエチレン製造設備の系統図を第１図に示す。図を
参照すれば、炭化水素原料（例えばナフサ）１は、予熱
器９で予熱され、熱分解炉３で熱父侠された彼、希釈水
蒸気２と混合され、熱分解炉３内に導入される。熱分解
炉３で生成した分解ガス４は、急冷器５で急冷され、蒸
留塔（前留塔）６、水冷塔７を通って冷却された後、塔
頂から分解ガス圧縮工程に送られる、蒸留塔６の缶出液
８は、原料予熱器９、および水冷塔の缶出液１２が供給
される希釈水蒸気用供給水子熱器１０、並びに低圧水蒸
気発生器１１等に送られ、その廃熱が回収されたのち、
一部は製品５１として抜き出され、他はライン５２から
蒸留塔６に再循環される。一方、水冷塔缶出液（水）の
一部１２は、希ヤ〈水蒸気用の供給水として予熱器１０
．１３を通り、希釈水蒸気槽１４に供給され、希釈水蒸
気発生ｂ１５Ａで水蒸気１６Ａにより加熱されて蒸発し
、希釈水蒸気２として前述のように熱分解炉３に送られ
る。なお、２５はボイラ給水、２６は水蒸気、２７は燃
料、２８は空気、２９はブローダウン水の各ラインであ
る。A system diagram of a conventional ethylene production facility is shown in Figure 1. Referring to the figure, a hydrocarbon feedstock (for example, naphtha) 1 is preheated in a preheater 9, heated in a pyrolysis furnace 3, mixed with dilution steam 2, and introduced into the pyrolysis furnace 3. Ru. The cracked gas 4 generated in the pyrolysis furnace 3 is rapidly cooled in a quencher 5, passed through a distillation column (pre-distillation column) 6 and a water cooling column 7, and then sent to the cracked gas compression step from the top of the column. The bottoms 8 of the distillation column 6 are sent to a raw material preheater 9, a dilution steam supply water heater 10 to which the bottoms 12 of the water cooling tower are supplied, a low-pressure steam generator 11, etc. After the heat is recovered,
A portion is withdrawn as product 51 and the other is recycled to distillation column 6 via line 52. On the other hand, a portion 12 of the water cooling tower bottoms (water) is supplied to the preheater 10 as feed water for steam.
．． 13, is supplied to the dilution steam tank 14, is heated and evaporated by the steam 16A in the dilution steam generation b15A, and is sent to the pyrolysis furnace 3 as dilution steam 2 as described above. Note that 25 is a boiler feed water line, 26 is a steam line, 27 is a fuel line, 28 is an air line, and 29 is a blowdown water line.
しかしながら、上記従来のエチレン製造設備の蒸留塔缶
出液の廃熱は、炭化水素原料の予熱（予熱器９）、希釈
水蒸気用供給水の予熱（予熱器ｌＯ）および低圧水蒸気
の発生（該発生器１１）等、熱の質の低いところでのみ
利用され、希釈水蒸気の発生には何ら用いられず、質の
商いところでの熱回収が充分に行なわれないという問題
があった。However, the waste heat of the distillation column bottoms of the conventional ethylene production facility is used to preheat the hydrocarbon raw material (preheater 9), preheat the feed water for dilution steam (preheater 1O), and generate low-pressure steam (the generated There is a problem that heat recovery is not sufficiently performed in places where heat quality is low because it is used only in places where the quality of heat is low, such as in heat exchangers 11), and it is not used at all to generate dilution steam.
本発明の目的は、エチレン製造設備の蒸留塔等の缶出液
の廃熱を有効に利用して熱分解炉への希釈用水蒸気を発
生させ、他の熱源による水蒸気発生量を軽減させること
ができる方法を提供することにある。An object of the present invention is to effectively utilize the waste heat of bottoms from a distillation column of ethylene production equipment to generate dilution steam for a pyrolysis furnace, thereby reducing the amount of steam generated by other heat sources. The goal is to provide a way to do so.
本発明は、水蒸気で希釈した炭化水素原料を熱分解炉で
分解処理して得られた分解ガスを急冷後、蒸留塔および
水冷塔で順次処理するエチレン製造方法において、蒸留
塔の缶出液の廃熱を利用し、その温度レベルに応じて複
数種の水蒸気を発生させ、該水蒸気を圧縮機を用いて加
圧し、前記炭化水素原料の希釈水蒸気または希釈水蒸気
発生の熱源として利用することを特徴とする。The present invention provides an ethylene production method in which cracked gas obtained by decomposing a hydrocarbon raw material diluted with steam in a pyrolysis furnace is rapidly cooled and then sequentially treated in a distillation column and a water cooling column. It is characterized by using waste heat to generate multiple types of steam depending on its temperature level, pressurizing the steam using a compressor, and using it as a dilution steam of the hydrocarbon raw material or a heat source for generating dilution steam. shall be.
以下、本発明を図面によりさらに詳細に説明する。Hereinafter, the present invention will be explained in more detail with reference to the drawings.
第２図は、本発明の一実施例を示すエチレン製造設備の
系統図である０図において、第１図の従来装置と異なる
点は、蒸留塔６の缶出液の全部を水蒸気発生槽１５およ
び１６の熱回収系に送って熱回収し、また希釈水蒸気槽
１４の缶出液を水蒸気発生槽１５および１６に順次供給
し、ここで発生した異なる圧力の水蒸気を圧縮機２１お
よび２２に送って加圧し、所定圧力の希釈水蒸気２を得
るようにしたことである。すなわち、水冷塔７の缶出孜
の一部１２は、従来と同様に希釈水蒸気用供給水として
予−器１３を通って希釈水蒸気槽１４に供給されるが、
その缶出液は槽底から抜き出されて水蒸気発生槽１５へ
送られ、さらにその缶出峨はその槽底から水蒸気発生槽
１６へそれぞれ自圧で供給される。上記水蒸気発生槽１
５および１６では、これらに付設された再沸器１７およ
び１８に前ｄピ蒸留塔缶出液８が供給され、その廃熱を
利用して水蒸気が発生される。水蒸気発生槽１５および
１６の圧力は、蒸留塔缶出液８の温度レベルによりそれ
ぞれ決定される。水蒸気発生槽１６から発生した水蒸気
１９は、圧縮機２１により加圧された後、水蒸気発生槽
１５に供給され、さらに水蒸気発生槽１５からの水蒸気
２０は圧縮機２２により加圧された後、希釈水蒸気槽１
４に供給される。希釈水蒸気４１ｉ１４に貯留された水
蒸気は積項から抜き出され、熱分解炉の希釈用水蒸気２
として利用される。なお、蒸留塔缶出液８の熱回収のみ
では希釈水蒸気の必要量を全緻発生させることはできな
いので、希釈水蒸気槽１４に付設された希釈水蒸気発生
器１５Ａで水蒸気１６Ａを利用して加熱し、希釈水蒸気
の不足分を発生させている。FIG. 2 is a system diagram of an ethylene production facility showing an embodiment of the present invention. The difference from the conventional equipment shown in FIG. and 16 for heat recovery, and the bottoms from the dilution steam tank 14 are sequentially supplied to steam generation tanks 15 and 16, and the steam generated here at different pressures is sent to compressors 21 and 22. The dilution steam 2 is pressurized to obtain dilution steam 2 at a predetermined pressure. That is, a portion 12 of the canned water from the water cooling tower 7 is supplied to the dilution steam tank 14 through the pre-equipment 13 as dilution steam supply water, as in the conventional case.
The bottoms are extracted from the tank bottom and sent to the steam generation tank 15, and the bottoms are further supplied from the tank bottom to the steam generation tank 16 under their own pressure. The above steam generation tank 1
In units 5 and 16, the distillation column bottom liquid 8 is supplied to reboilers 17 and 18 attached thereto, and steam is generated using the waste heat thereof. The pressures of the steam generating tanks 15 and 16 are determined by the temperature level of the distillation column bottoms 8, respectively. Steam 19 generated from the steam generation tank 16 is pressurized by a compressor 21 and then supplied to the steam generation tank 15. Furthermore, the steam 20 from the steam generation tank 15 is pressurized by the compressor 22 and then diluted. Steam tank 1
4. The steam stored in the dilution steam 41i14 is extracted from the product term and is used as the dilution steam 2 of the pyrolysis furnace.
used as. Note that it is not possible to fully generate the required amount of dilution steam only by recovering heat from the distillation column bottoms 8, so the dilution steam generator 15A attached to the dilution steam tank 14 uses steam 16A to heat the distillation column bottoms 8. , generating a shortage of dilution steam.
上記実施例によれば、従来、熱の質の低いところで回収
していた缶出液の廃熱を希釈用水蒸気の発生という高レ
ベルでの熱回収に利用することができ、例えば希釈水蒸
気の発生のために使用していた水蒸気量を約６５−減少
させることができる。According to the above embodiment, the waste heat of bottoms, which was conventionally recovered in a place with low heat quality, can be used for high-level heat recovery of generating dilution steam, for example, generating dilution steam. The amount of water vapor used for this purpose can be reduced by approximately 65%.
次に第３図は、本発明の他の実施例を示すエチレン製造
設備の水蒸気発生部分の系統図であるが、この実施例で
は、圧縮機２１からの水蒸気は直接圧縮機２２に送られ
、また圧縮機２２の蒸気は希釈水蒸気［１４に送らずに
直接希釈水蒸気の供給ラインに導入される。このように
構成した場合は、圧縮機２１と水蒸気発生槽１５、圧８
機２２と希釈水蒸気槽１４の間の配管が不要になり、装
置をコンパクト化することができる。なお、圧縮機２１
．２２は、単一段のみならず、多段のものを使用しても
よい。Next, FIG. 3 is a system diagram of the steam generation part of an ethylene production facility showing another embodiment of the present invention. In this embodiment, the steam from the compressor 21 is sent directly to the compressor 22. Further, the steam from the compressor 22 is directly introduced into the dilution steam supply line without being sent to the dilution steam [14]. When configured in this way, the compressor 21, the steam generating tank 15, and the pressure 8
This eliminates the need for piping between the machine 22 and the dilution steam tank 14, allowing the apparatus to be made more compact. In addition, the compressor 21
．． 22 may be used not only in a single stage but also in multiple stages.
さらに第４図は、本発明の他の実施例を示すもので、発
生する希釈水蒸気が機器の腐食、汚れ等に・より汚染さ
れている場合、そのまま圧縮機へ送ることは問題となる
ため、先ず第２図の場合と同様に蒸留塔缶出液８の廃熱
を利用して純粋の水蒸気を水蒸気発生槽１５および１６
で発生させ、この水蒸気を圧縮機２１および２２で加圧
した彼、加圧された水蒸気を希釈水蒸気槽１４に付設さ
れた希釈水蒸気発生器１５Ｂで希釈水蒸気を発生させる
ための熱源として利用するものである。希釈水蒸気発生
器１５Ｂの凝縮水は水蒸気発生槽１５へ返送され、循環
される。この場合、圧縮＠２１、２２には純粋の水蒸気
が送られるため、腐食および汚れの問題を避けることが
できる。なお、水蒸気発生槽１５へは純水３０が供給さ
れる。また２９Ｂはブローダウン水である。Furthermore, FIG. 4 shows another embodiment of the present invention. If the generated diluted steam is contaminated by equipment corrosion, dirt, etc., it would be problematic to send it directly to the compressor. First, as in the case of FIG.
The compressors 21 and 22 pressurize the steam, and the pressurized steam is used as a heat source for generating dilution steam in the dilution steam generator 15B attached to the dilution steam tank 14. It is. The condensed water of the dilution steam generator 15B is returned to the steam generation tank 15 and circulated. In this case, the compression@21, 22 is fed with pure water vapor, thereby avoiding corrosion and fouling problems. Note that pure water 30 is supplied to the steam generation tank 15. Further, 29B is blowdown water.
以上、本発明によれば、エチレン製造設備において、蒸
留塔等の缶出液の廃熱を有効に回収し、熱分解炉の希釈
用水蒸気を系内で発生させることができる。As described above, according to the present invention, in an ethylene production facility, waste heat of bottoms from a distillation column or the like can be effectively recovered, and steam for dilution of a pyrolysis furnace can be generated within the system.
第１図および第２図は、従来および本発明の水蒸気発生
装置を含むエチレン製造設備や系統図、第３図゛は、本
発明の他の実施例を示す水蒸気発生装置部分の系統図、
第４図は発生加圧された水蒸気を希釈水蒸気発生の熱源
として利用した実施例を示す本発明の水蒸気発生製置部
分の系統図である。
１・・・炭化水素原料、２・・・希釈水蒸気、３・・・
熱分解炉、６・・・蒸留塔、７・・・水冷塔、１４・・
・希釈水蒸気槽、１５．１６・・・水蒸気発生槽、２１
．２２・・・圧縮機。
代理人 弁理士 川 北 武 長1 and 2 are system diagrams of ethylene production equipment including conventional and inventive steam generators, and FIG. 3 is a system diagram of the steam generator section showing another embodiment of the present invention.
FIG. 4 is a system diagram of the steam generation installation part of the present invention, showing an embodiment in which the generated and pressurized steam is used as a heat source for generating dilution steam. 1... Hydrocarbon raw material, 2... Dilution steam, 3...
Pyrolysis furnace, 6... Distillation column, 7... Water cooling tower, 14...
・Dilution steam tank, 15.16...Steam generation tank, 21
．． 22...Compressor. Agent Patent Attorney Takeshi Kawakita
Claims (1)
処理して得られた分解ガスを急冷後、蒸留塔および水冷
塔で順次処理するエチレン製造方法において、蒸留塔の
缶出液の廃熱を利用し、その温度レベルに応じて複数種
の水蒸気を発生させ、該水蒸気を圧縮機を用いて加圧し
、前記炭化水素原料の希釈水蒸気または該希釈水蒸気発
生の熱源として利用することを特徴とするエチレン製造
におけろ水蒸気発生方法１．(1) In an ethylene production method in which the cracked gas obtained by decomposing hydrocarbon raw materials diluted with steam in a pyrolysis furnace is rapidly cooled and then sequentially treated in a distillation column and a water cooling column, the bottoms of the distillation column are disposed of. It is characterized by using heat to generate multiple types of steam depending on the temperature level, pressurizing the steam using a compressor, and using it as a dilution steam of the hydrocarbon raw material or a heat source for generating the dilution steam. Method for generating steam in ethylene production 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56179794A JPS5883090A (en) | 1981-11-11 | 1981-11-11 | Generation of steam in ethylene manufacture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56179794A JPS5883090A (en) | 1981-11-11 | 1981-11-11 | Generation of steam in ethylene manufacture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5883090A true JPS5883090A (en) | 1983-05-18 |
Family
ID=16072005
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56179794A Pending JPS5883090A (en) | 1981-11-11 | 1981-11-11 | Generation of steam in ethylene manufacture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5883090A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004524338A (en) * | 2001-03-15 | 2004-08-12 | シエル・インターナシヨナル・リサーチ・マートスハツペイ・ベー・ヴエー | How to pyrolyze a light feed |
| JP2016536109A (en) * | 2013-09-25 | 2016-11-24 | リンデ アクチエンゲゼルシャフトＬｉｎｄｅ Ａｋｔｉｅｎｇｅｓｅｌｌｓｃｈａｆｔ | A tower equipped with a mass transfer tray composed of prismatic bodies and a liquid distributor |
-
1981
- 1981-11-11 JP JP56179794A patent/JPS5883090A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004524338A (en) * | 2001-03-15 | 2004-08-12 | シエル・インターナシヨナル・リサーチ・マートスハツペイ・ベー・ヴエー | How to pyrolyze a light feed |
| JP2016536109A (en) * | 2013-09-25 | 2016-11-24 | リンデ アクチエンゲゼルシャフトＬｉｎｄｅ Ａｋｔｉｅｎｇｅｓｅｌｌｓｃｈａｆｔ | A tower equipped with a mass transfer tray composed of prismatic bodies and a liquid distributor |
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