CN102553280A - Benzene/toluene tower type primary preheating device - Google Patents
Benzene/toluene tower type primary preheating device Download PDFInfo
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- CN102553280A CN102553280A CN2012100632411A CN201210063241A CN102553280A CN 102553280 A CN102553280 A CN 102553280A CN 2012100632411 A CN2012100632411 A CN 2012100632411A CN 201210063241 A CN201210063241 A CN 201210063241A CN 102553280 A CN102553280 A CN 102553280A
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- benzene
- toluene tower
- preheating device
- toluene
- tower
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Abstract
The invention relates to a benzene/toluene tower type primary preheating device, relating to an energy-saving device for chemical production, in particular to a device for preheating materials fed into a benzene/toluene tower for styrene rectification. The benzene/toluene tower type primary preheating device comprises a benzene/toluene tower, the inlet of the benzene/toluene tower is connected with two preheating devices in series, the tube pass of the primary preheating device is respectively connected with a settlement tank stripping tower and a condensate filter, the tube pass of the secondary preheating device is respectively connected with an exhaust gas compressor and a deep cooling device, and the shell passes of the primary preheating device and the secondary preheating device are communicated and are connected with the inlet of the benzene/toluene tower in series. The benzene/toluene tower type primary preheating device has the beneficial effects that: the temperature of materials can be increased effectively due to heat exchange of two heat exchangers connected in series, and when rectification is carried out in the benzene/toluene tower, the steam consumption can be reduced greatly, and energy can be saved.
Description
Technical field
The present invention relates to a kind of Chemical Manufacture energy saver, relate in particular to pre-heating temperature elevation the used benzene of phenyl ethylene rectification, toluene tower charging.
Background technology
80% styrene product is to be made by ethylbenzene dehydrogenation technology in the market, and technological process comprises that ethylbenzene dehydrogenation separates two parts with phenyl ethylene rectification, and ethylbenzene can be told the styrene finished product with rectificating method after reaction conversion, dehydrogenation.The shortcoming of this method is that steam consumption is bigger; In former design; Benzene, toluene tower charging (40 ℃) are to carry out heat exchange with compressed exhaust gas (150 ℃), and the charging of benzene/methylbenzene tower can reach about 90 ℃ after the heat exchange, and benzene, the consumption of toluene tower low pressure steam are about 7.5t/h; Cause the waste of the energy, increased production cost.
Summary of the invention
The purpose of this invention is to provide a kind of benzene, the elementary preheating device of toluene tower, improve benzene, toluene preheat temperature, reduce the used quantity of steam of phenyl ethylene rectification, realize producing energy-conservation.
For realizing above-mentioned purpose, the technical scheme that the present invention adopts is:
A kind of benzene, the elementary preheating device of toluene tower; Comprise benzene, toluene tower; It is characterized in that: said benzene, toluene tower inlet serial connection two-stage preheater, one-level preheater tube side wherein connects settling tank stripper and lime set filter respectively, and secondary preheater tube side wherein connects tail-gas compressor and cryogenic system respectively; Said one-level preheater connects with secondary preheater shell side and is connected, and is connected in series mutually with benzene, toluene tower inlet.
Beneficial effect of the present invention is: through the heat exchange of two-stage serial connection heat exchanger, temperature of charge is effectively improved, at benzene, when toluene tower carries out rectifying, saved steam consumption greatly, practiced thrift the energy.
Description of drawings
Fig. 1 is a structural representation of the present invention.
Among the figure: 1. one-level preheater; 2. secondary preheater; 3. lime set filter; 4. cryogenic system; 5. settling tank stripper; 6. tail-gas compressor; 7. benzene, toluene tower.
The specific embodiment
Can know by accompanying drawing 1; The present invention includes benzene, toluene tower 7; Said benzene, toluene tower 7 inlet serial connection two-stage preheaters, one-level preheater 1 tube side wherein connects settling tank stripper 5 and lime set filter 3 respectively, and secondary preheater 2 tube sides wherein connect tail-gas compressor 6 and cryogenic system 4 respectively; Said one-level preheater 1 connects with secondary preheater 2 shell sides and is connected, and is connected in series mutually with benzene, toluene tower 7 inlets.
The above tail-gas compressor 6 inlet connects the tail gas outlet of dehydrogenation operation, utilizes the heat transferring medium of dehydrogenated tail gas as secondary preheater of the present invention.Benzene, toluene tower charging through one-level preheater 1, are carried out heat exchange with the high temperature lime set of settling tank stripper 5 earlier, and benzene, toluene tower charging through secondary preheater 2, are carried out heat exchange with compressed tail gas again after the heat exchange.
Among the present invention, benzene, toluene tower feeding temperature are about 40 ℃, about 80 ℃ of high temperature lime set temperature, about 150 ℃ of compressed tail gas temperature.Temperature can reach about 70 ℃ after benzene, the heat exchange of toluene tower charging process one-level, can reach about 96 ℃ through temperature after the secondary heat exchange, and the used steam consumption of phenyl ethylene rectification is about 5t/h in the tower.
Claims (1)
1. a benzene, the elementary preheating device of toluene tower; Comprise benzene, toluene tower; It is characterized in that: said benzene, toluene tower inlet serial connection two-stage preheater, one-level preheater tube side wherein connects settling tank stripper and lime set filter respectively, and secondary preheater tube side wherein connects tail-gas compressor and cryogenic system respectively; Said one-level preheater connects with secondary preheater shell side and is connected, and is connected in series mutually with benzene, toluene tower inlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100632411A CN102553280A (en) | 2012-03-07 | 2012-03-07 | Benzene/toluene tower type primary preheating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100632411A CN102553280A (en) | 2012-03-07 | 2012-03-07 | Benzene/toluene tower type primary preheating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102553280A true CN102553280A (en) | 2012-07-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100632411A Pending CN102553280A (en) | 2012-03-07 | 2012-03-07 | Benzene/toluene tower type primary preheating device |
Country Status (1)
| Country | Link |
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| CN (1) | CN102553280A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106546066A (en) * | 2015-09-22 | 2017-03-29 | 中国石油化工股份有限公司 | A kind of method for reclaiming hydro carbons in ethylbenzene catalytic dehydrogenation tail gas |
| CN114060789A (en) * | 2021-11-29 | 2022-02-18 | 中国成达工程有限公司 | Method for recovering heat of isopropyl benzene device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1648037A (en) * | 2004-12-17 | 2005-08-03 | 南京大学 | Process and device for producing nano carbon fiber |
| CN101250079A (en) * | 2008-03-28 | 2008-08-27 | 天津大学 | Heat-exchange network device for refining crude benzene and method of operation |
-
2012
- 2012-03-07 CN CN2012100632411A patent/CN102553280A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1648037A (en) * | 2004-12-17 | 2005-08-03 | 南京大学 | Process and device for producing nano carbon fiber |
| CN101250079A (en) * | 2008-03-28 | 2008-08-27 | 天津大学 | Heat-exchange network device for refining crude benzene and method of operation |
Non-Patent Citations (2)
| Title |
|---|
| 王明福: "齐鲁苯乙烯装置模拟优化和节能改造", 《天津大学硕士学位论文》 * |
| 陈丽: "苯/ 甲苯塔AS- 201 操作分析及优化", 《化学工程师》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106546066A (en) * | 2015-09-22 | 2017-03-29 | 中国石油化工股份有限公司 | A kind of method for reclaiming hydro carbons in ethylbenzene catalytic dehydrogenation tail gas |
| CN106546066B (en) * | 2015-09-22 | 2019-09-13 | 中国石油化工股份有限公司 | A method of hydro carbons in recycling ethylbenzene catalytic dehydrogenation tail gas |
| CN114060789A (en) * | 2021-11-29 | 2022-02-18 | 中国成达工程有限公司 | Method for recovering heat of isopropyl benzene device |
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Application publication date: 20120711 |