CN2081075U - Fast-cool heat-exchanger with big pipe diameter sleeve - Google Patents
Fast-cool heat-exchanger with big pipe diameter sleeve Download PDFInfo
- Publication number
- CN2081075U CN2081075U CN 90222262 CN90222262U CN2081075U CN 2081075 U CN2081075 U CN 2081075U CN 90222262 CN90222262 CN 90222262 CN 90222262 U CN90222262 U CN 90222262U CN 2081075 U CN2081075 U CN 2081075U
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- China
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- heat exchanger
- flange
- inlet
- interior pipe
- millimeters
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- Expired - Lifetime
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Abstract
The utility model relates to a large tube diameter sleeve type fast-cooling heat exchanger which is matched with a tube cracking furnace. A protective sleeve is arranged at the position of an inlet, which increases the resistance of the heat exchanger to thermal shocks; the outer wall of an inner tube is provided with rifles, which intensifies the effect of heat transmission; flange structures are arranged at the positions of the inlet and an outlet of the heat exchanger, which is convenient for maintenance and coke scavenge. The utility model has the advantages of simple structure, easy fabrication and low cost.
Description
The utility model relates to chilling heat transmission equipment supporting in the petrochemical industry hydro carbons tube cracking furnace.
Hydro carbons carries out heat scission reaction in tube cracking furnace, the temperature of the Pintsch process gas that produces can be up to 800～900 ℃, for manufacturing technique requirent and effective heat that reclaims, generally adopt the method for chilling heat exchange, obtain high temperature, high-pressure water vapor (pressure is about 11～12MPa, and temperature is about 320～326 ℃).The domestic and international rapid-cooling heat exchanger that in tube cracking furnace, uses, matching used rapid-cooling heat exchanger is two bushing type rapid-cooling heat exchangers in the pyrolysis furnace that U.S. Lu Musi (Lummus) company is arranged commonly used, matching used rapid-cooling heat exchanger is a semi-spiral tubular type rapid-cooling heat exchanger in the inverted trapezoidal type pyrolysis furnace of MIT, matching used rapid-cooling heat exchanger is the bushing type rapid-cooling heat exchanger in the W type pyrolysis furnace of U.S. Si Dong-Hui Bosite (S.W) company, FDAC---hila. matching used rapid-cooling heat exchanger is a U type tubular type rapid-cooling heat exchanger in this pyrolysis furnace.
Above-described four kinds of rapid-cooling heat exchangers, be used for the hydro carbons tube cracking furnace significant disadvantages is all arranged, two bushing type rapid-cooling heat exchangers and semi-spiral tubular type rapid-cooling heat exchanger, be to belong to a chilling technique, can not be widely applicable for the cracking technique of multiple cracking stock hydrocarbon, so the quantity of steam that reclaims does not have the many of secondary chilling technique, and the coking cycle is short, often need the blowing out coke cleaning, influenced the output of ethene.The U type length of tube of U jacket tubular type rapid-cooling heat exchanger very long (about 28 meters), cracking gas is long at intraductal retention time, easily coking, coke cleaning is inconvenient again, has shortened the cycle of coke cleaning.The cracking gas of bushing type rapid-cooling heat exchanger is imported and exported, there is not flange arrangement, so bring inconvenience for coke cleaning and maintenance, and it is unclear to the coke cleaning situation, need frequent coke cleaning, in addition, the outer wall of inner tube of import department easily forms film boiling, can cause tube wall temperature too high, the service life of pipe in the influence.
The purpose of this utility model is to avoid above-mentioned shortcoming of the prior art, provides a kind of and can bear that the coking ability is big, coke cleaning period is long, after can separating with pyrolysis furnace, carries out the novel big caliber bushing type rapid-cooling heat exchanger of mechanical decoking.
Task of the present utility model is achieved in that this heat exchanger by two coaxial tubular cylinders that diameter is different, and promptly interior pipe and outer tube are formed.Interior pipe adopts major diameter (its bore is 133 millimeters of φ 108～φ), and pipe range is 8～16 meters; According to technological requirement, the annular space between outer tube and the interior pipe with certain limit.Outer tube is provided with recirculated water inlet and high temperature, high-pressure water vapor outlet, protects steam inlet.For augmentation of heat transfer, process rifle on portion's outer surface on inner pipe, about 300～1200 millimeters of its length.For the ease of coke cleaning and maintenance, be provided with the hubbed flange structure at the two ends of heat exchanger.In order to protect interior pipe, increase thermal shock resistance, be provided with protective casing in the import department of heat exchanger.Can design according to production capacity, make corresponding series of products, material can be selected the high strength heat resistant steel for use.
Fig. 1 is big caliber bushing type rapid-cooling heat exchanger structural representation.Among the figure: (1) flange linkage section; (2) import protection tube; (3) inlet hubbed flange; (4) protection steam inlet pipeline section, (5) nitrogen inlet pipeline section, pipe in (6); (7) outer tube; (8) outlet hubbed flange, (9) high temperature, high steam outlet pipe section, (10) recirculated water inlet pipeline section.(a) cracking gas import, (b) cracking gas outlet, (C) recirculated water inlet, (d) high temperature, high-pressure water vapor outlet, (e) protection steam inlet, (f) nitrogen inlet.
Fig. 2 is a rifle schematic diagram on interior pipe and the pipe outer wall.Among the figure: L is a rifle length, and L1 is the distance L 1 of Guan Erduan in the rifle start point distance.
The utility model is described in further detail as follows in conjunction with the accompanying drawings: the interior pipe (6) and the outer tube (7) of this rapid-cooling heat exchanger are coaxial tubular cylinder, an end (not being an end of flange) of outlet hubbed flange (8) process the size that is connected mutually with interior pipe (6), outer tube (7) and certain depth with interior pipe (6), annular space diameter that outer tube (7) is equal; The outlet hubbed flange is connected with interior pipe (6) and outer tube (7), adopts welding.The annular space diameter that equates with interior pipe (6) and outer tube (7) that one end of flange linkage section (1) processes the size that is connected mutually with interior pipe (6), outer tube (7) and certain depth; Flange linkage section (1) is connected with interior pipe (6) and outer tube (7), adopts welding.The other end of flange linkage section (1) processes the size that is connected mutually with the hubbed flange that enters the mouth (3), and processes the inner groovy of certain depth; Flange linkage section (1) is connected with inlet hubbed flange (3), adopts welding.Arranged outside recirculated water inlet pipeline section (10) at flange linkage section (1).An end arranged outside high temperature, high-pressure water vapor outlet pipe section (9) at the outlet hubbed flange.Upper side at flange linkage section (1) is provided with protection steam inlet pipeline section (4); Top at the lower side annular space of flange linkage section (1) is provided with this heat exchanger after processing and manufacturing is finished, and feeds the nitrogen inlet section (5) of nitrogen through overpickling, after cleaning.
Working condition of the present utility model is such: temperature is 336 ℃, pressure is the saturated recirculated water of 12.4MPa, enter from recirculated water inlet (C), annular space between interior pipe (6) and outer tube (7), by 860 ℃ of Pintsch process gas of coming in from cracking gas import (a), conduct heat by interior pipe (6) tube wall and to vaporize, the superheat steam temperature of having vaporized is 336 ℃, pressure is 12.4MPa, goes out from high temperature, high-pressure water vapor outlet (d); And be that cracking gas about 625 ℃ is left away from cracking gas outlet (b) through the temperature after the exchange heat.Before 860 ℃ cracked gas entered from cracking gas import (a), the protection steam of low pressure just entered from protection steam inlet (e), the material of inlet hubbed flange (3) and adpting flange section (1) was protected, to avoid the impact of high temperature.
The utility model has the following advantages compared to existing technology:
1, prolonged coke cleaning period. During heavy oil cracking, coke cleaning period is 40～60 days. During light oil pyrolysis, coke cleaning period is 50～90 days.
2, strengthen heat transfer, protected interior pipe, improved steam productive rate 10%.
3, coke cleaning and maintenance are convenient.Mechanical decoking the time can separate with pyrolysis furnace with maintenance.
4, simple in structure, easily manufactured, expense is low.
Claims (6)
1, the matching used big caliber bushing type rapid-cooling heat exchanger of a kind of and tube cracking furnace, it is characterized in that: interior pipe (6) and outer tube (7) they are coaxial tubular cylinder; The upper end of interior pipe (6) and outer tube (7) is connected with flange linkage section (1); Flange linkage section (1) upper end is connected with inlet hubbed flange (3); Outlet hubbed flange (8) is connected with the lower end of interior pipe (6) with outer tube (7); At the annular space upper and lower side recirculated water inlet pipeline section (10) and high temperature, high-pressure water vapor outlet pipe section (9) are set; In inlet high frequency-flange (3), set up import protection tube (2); In the inner groovy bottom of inlet hubbed flange (3), the bottom arranged outside protection steam inlet section (4) of inlet hubbed flange (3).
2, heat exchanger according to claim 1 is characterized in that: the caliber of interior pipe (6) is 133 millimeters of φ 108～φ, and preferable range is 127 millimeters of φ 110～φ.
3, heat exchanger according to claim 2, it is characterized in that: pipe (6) upper end distance L 1=20～100 millimeters places are provided with rifle in the outer span of interior pipe (6), the length L of rifle is 300～1200 millimeters, and preferential range L is 350～1000 millimeters.
4, heat exchanger according to claim 1 is characterized in that: on the top of heat exchanger (import department) import protection tube (2) is set, its length is 250～750 millimeters.
5, heat exchanger according to claim 4 is characterized in that: annular space is 0.5～2 millimeter between the internal diameter of the external diameter of import protection tube (2) and interior pipe (6).
6, heat exchanger according to claim 1 is characterized in that: the import and the exit of heat exchanger are provided with flange arrangement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90222262 CN2081075U (en) | 1990-10-18 | 1990-10-18 | Fast-cool heat-exchanger with big pipe diameter sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 90222262 CN2081075U (en) | 1990-10-18 | 1990-10-18 | Fast-cool heat-exchanger with big pipe diameter sleeve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2081075U true CN2081075U (en) | 1991-07-17 |
Family
ID=4900239
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 90222262 Expired - Lifetime CN2081075U (en) | 1990-10-18 | 1990-10-18 | Fast-cool heat-exchanger with big pipe diameter sleeve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2081075U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101975527A (en) * | 2010-10-21 | 2011-02-16 | 中国石油化工股份有限公司 | Linear quenching heat exchanger inlet connecting piece and quenching heat exchanger thereof |
| CN101162129B (en) * | 2007-11-28 | 2011-10-05 | 上海吴泾化工有限公司 | Method for utilizing cracking gas waste heat and gas-gas exchanger used therefor |
| CN102910634A (en) * | 2012-10-30 | 2013-02-06 | 河北科技大学 | Finger-type heat exchanger with triple-sleeve structure used in fluidized bed reactor for synthesizing trichlorosilane |
| CN102925196A (en) * | 2012-09-28 | 2013-02-13 | 沈阳石蜡化工有限公司 | Anti-coking device for high-temperature pyrolysis gas inlet of oil gas quench cooler |
-
1990
- 1990-10-18 CN CN 90222262 patent/CN2081075U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101162129B (en) * | 2007-11-28 | 2011-10-05 | 上海吴泾化工有限公司 | Method for utilizing cracking gas waste heat and gas-gas exchanger used therefor |
| CN101975527A (en) * | 2010-10-21 | 2011-02-16 | 中国石油化工股份有限公司 | Linear quenching heat exchanger inlet connecting piece and quenching heat exchanger thereof |
| CN101975527B (en) * | 2010-10-21 | 2012-07-25 | 中国石油化工股份有限公司 | Linear quenching heat exchanger inlet connecting piece and quenching heat exchanger thereof |
| CN102925196A (en) * | 2012-09-28 | 2013-02-13 | 沈阳石蜡化工有限公司 | Anti-coking device for high-temperature pyrolysis gas inlet of oil gas quench cooler |
| CN102925196B (en) * | 2012-09-28 | 2014-08-13 | 沈阳石蜡化工有限公司 | Anti-coking device for high-temperature pyrolysis gas inlet of oil gas quench cooler |
| CN102910634A (en) * | 2012-10-30 | 2013-02-06 | 河北科技大学 | Finger-type heat exchanger with triple-sleeve structure used in fluidized bed reactor for synthesizing trichlorosilane |
| CN102910634B (en) * | 2012-10-30 | 2016-06-15 | 河北科技大学 | A kind of for the finger-type heat exchanger with three-casing structure in trichlorosilane resultant current fluidized bed reactor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C15 | Extension of patent right duration from 15 to 20 years for appl. with date before 31.12.1992 and still valid on 11.12.2001 (patent law change 1993) | ||
| RN01 | Renewal of patent term | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |