CN100425940C - High temperature cracking descaling set and method for tube bundle in large shell-and-tube heat exchanger - Google Patents
High temperature cracking descaling set and method for tube bundle in large shell-and-tube heat exchanger Download PDFInfo
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- CN100425940C CN100425940C CNB2005101004725A CN200510100472A CN100425940C CN 100425940 C CN100425940 C CN 100425940C CN B2005101004725 A CNB2005101004725 A CN B2005101004725A CN 200510100472 A CN200510100472 A CN 200510100472A CN 100425940 C CN100425940 C CN 100425940C
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Abstract
The present invention relates to a split descaling device with high temperature and a descaling method for tube bundles of large size tube type heat exchangers, which is used for cleaning and descaling tube bundles of tube type heat exchangers used in the petroleum industry and the chemical industry. The device of the present invention is provided with a heat insulation box body; the inner wall of the box body is provided with a heater and a temperature difference monitoring device; the body is provided with a device for uniformly regulating temperature distribution in the box body; a carrying device for tube bundles of heat exchangers is arranged in the box body. In the descaling method of the descaling device, whole tube bundles of heat exchangers are stably and uniformly heated to guarantee the safety of the exchangers; after viscous and hard hydrocarbon structures in the tube bundles are split and carbonized, water jet flow with high pressure which is not lower than 40MPA flushes porous carbonide out to complete descaling work. The present invention effectively removes viscous and hard hydrocarbon scaling objects in tube bundles of large size tube type heat exchangers by cleaning, and guarantees the safety of exchangers at the same time.
Description
Technical field
The present invention relates to the cleaning and descaling of the employed shell class of industry heat exchanger-type equipment such as oil, chemical industry, electric power, light industry, pharmacy, refrigeration.
Background technology
In industries such as oil, chemical industry, shell class heat exchanger is widely adopted, and this large-scale shell class heat transmission equipment tube bank in use is to want regular cleaning maintenance, to guarantee its heat exchanger effectiveness.Using more technology at present mainly is that water under high pressure cleans, and its hydraulic pressure often reaches 50～200MPa, to the also useful Chemical cleaning of incrustation scale class shell side fouling, several methods such as mechanical bull stick cleaning.Medium at the technology macromolecular chain in service of industries such as oil refining, ethene is more, in running because various factors, the tube side that heat-exchanging tube bundle often takes place is stopped up by thickness or hard material, high pressure water jet with routine is difficult to handle, also can't be with chemical cleaning method and mechanical bull stick method for cleaning, often the blockage problem of this kind equipment is not handled owing to on-the-spot, operation produces bigger influence to device, people feel simply helpless to the obstruction of this class main equipment for a long time, can only be that it is discarded at last.
Summary of the invention
The Pintsch process descaling equipment and the descaling method that the purpose of this invention is to provide a kind of large-scale shell class heat transmission equipment tube bank, it can be easy to the thickness in the tube bank of large-scale shell class heat transmission equipment, hard hydrocarbon foulant charing to clean, and will guarantee the safety of equipment simultaneously.
Technical solution of the present invention is a kind of Pintsch process descaling equipment of large-scale shell class heat transmission equipment tube bank, it has an insulation casing, cabinet wall is provided with heater, temperature difference supervising device, spatial temperature distribution even regulation device in the casing, and the bogey that the heat transmission equipment tube bank is arranged in the casing.
The heater that is provided with on the above cabinet wall is resistance heating wire's electric heater.
Temperature difference supervising device of the present invention is to be no less than the temperature thermocouple that 6 spaced points are provided with in the casing.
Above send out case described in spatial temperature distribution even regulation device be the wind pipe that the casing internal upper part is provided with, the outer high temperature resistant centrifugal fan air outlet of wind pipe and casing is connected, there is air draft pipe at place, nearly bottom in the casing, and air draft pipe is connected with air inlet.
Carrying heat transmission equipment tube bundle device is that cradle type supports in the casing of the present invention, and bogey is the holder car, and the wheel that is free to slide is arranged under the car, or track.
A kind of method of Pintsch process scale removal of large-scale shell class heat transmission equipment tube bank, be when shell class heat transmission equipment enters in the casing of Pintsch process descaling equipment by bogey of the present invention after, casing heats shell class heat transmission equipment is whole with closed, according to the aerial burning-point operated by rotary motion of medium at 350～600 ℃, electric heater heats up in 30 ℃/h～50 ℃/h, with high temperature resistant centrifugal fan system forced action type to air circulation in the casing, make the interior temperature of casing even, this even temperature heats up to integral device, homogeneous heating, and the temperature thermocouple that is provided with by many places in the casing, to heating-up temperature and everywhere the temperature difference monitor, control casing in everywhere maximum temperature difference be not more than 20 ℃, after heating about 10-12 hour, the thickness in the tube bank, hard hydrocarbon foulant charing, liquefy flows out, or resolve into than the coke powder class material that is easier to clear up, clean restraining inside with the water under high pressure that is not less than 40MPa at last.
Owing to exist the yielding distortion of tube bank under the high temperature on the large-scale shell-and-tube heat transmission equipment structure, even the phenomenon of tube bank and tube sheet sealing-off under the thermal (temperature difference) stress effect, although the therefore general situation method scale removal of Pintsch process carbonization of can deriving, to large-scale shell class heat transmission equipment tube bank because above reason Pintsch process scale removal feel simply helpless.Scale removal key point of the present invention promptly is the even heating to integral device, the control medium heating flame, and the temperature monolithic stability of heat transmission equipment cylindrical shell guarantees device security.
Heat exchanger of the present invention adopts mode in holder car or the track turnover insulation casing, can enter Pintsch process in the casing, burn foulant by realization equipment, pull out the outer water under high pressure coke cleaning of casing, finish every operation continuously, increase work efficiency, the present invention adopts high temperature resistant centrifugal fan, forces air circulation in the casing, assurance equipment is whole to heat up homogeneous heating.Cabinet wall is provided with resistance wire, and electrical heating heats up, and programming rate makes the thermal expansion of metal stable at 30 ℃/h-50 ℃/h.The cradle type that the present invention adopts free wheel type to slide to the support of tube bank supports, guarantee tube bank free wxpansion, the temperature thermocouple that many places are provided with in the insulation casing, can to heating-up temperature and everywhere the temperature difference monitor, in the control casing everywhere maximum temperature difference in 20 ℃.
The present invention adopts electrical heating Pintsch process descalling technique, can make thickness, hard hydrocarbon foulant that charing takes place under certain high temperature and decompose.The medium of the technology macromolecular chain in service of industries such as oil refining, ethene is more, all be difficult to remove with high pressure water jet and mechanical bull stick in the intrafascicular formation thickness of Tube Sheet of Heat Exchanger, hard fouling, often cause equipment too early scrap processing, adopt equipment of the present invention and this method just to be readily solved, the charing point of different medium foulings is different, at 350～500 ℃, and the cracking charing of the above heavy ends coking material of the C9 of oil refining industry is o'clock at 500～600 ℃ as the cracking charing of ethylene industry butylene high polymer o'clock.
Advantage of the present invention is that it can be easy to the thickness in the tube bank of large-scale shell class heat transmission equipment, hard hydrocarbon foulant charing to clean, and has guaranteed the safety of equipment simultaneously.
Description of drawings
Fig. 1 is an equipment organigram of the present invention;
Fig. 2 is electric heater unit of the present invention position and holder car cross-sectional configurations schematic diagram.
The specific embodiment
The Pintsch process descaling equipment of a kind of large-scale shell class heat transmission equipment tube bank of the present invention, it has an insulation casing 1, because the specification of general heat transmission equipment, its diameter is about 1 meter, length is about 8 meters, so the general design of casing specification is 2 * 2 * 10 meters scope.6～10 temperature thermocouples 4 that casing 1 inwall is provided with resistance heating wire 5 and is distributed in many places, casing 1 is provided with spatial temperature distribution even regulation device, and this adjusting device is to be provided with wind pipe at casing 1 internal upper part, with 3000 outer～5000Nm of casing
3/ h is high temperature resistant, and centrifugal fan 6 air outlets are connected, and place, nearly bottom has air draft pipe to be connected with the air inlet of blower fan 6 in the casing.And the bogey that the heat transmission equipment tube bank is arranged in the casing, the holder car 3 that this bogey has a cradle type to support, heat transmission equipment tube bank 2 places on the holder car 3 of cradle type support, and the wheel that is free to slide is arranged under the vehicle body.
Descaling method of the present invention is to come the method for scale removal to restrain 2 when heat transmission equipment with equipment of the present invention to place on the holder car 3 of cradle type support, and after entering in the heat-insulation and heat-preservation casing 1, casing heats shell class heat transmission equipment is whole with closed, according to the aerial burning-point of medium, operated by rotary motion is at 350～600 ℃, the resistance wire heat temperature raising in 30 ℃/h～50 ℃/h, with high temperature resistant centrifugal fan 6 forced action types air circulation in the casing is made the whole intensification of heat transmission equipment, to heating-up temperature and everywhere the temperature difference monitor, control casing in everywhere maximum temperature difference be not more than 20 ℃, after heating 10～12 hours, thickness in the tube bank, hard hydrocarbon foulant charing is cleaned restraining inside with the water under high pressure that is not less than 40MPa at last.
Claims (6)
1, a kind of Pintsch process descaling equipment of large-scale shell class heat transmission equipment tube bank, it is characterized in that having an insulation casing, cabinet wall is provided with heater, temperature difference supervising device, casing is provided with spatial temperature distribution even regulation device in the case, and the bogey that the heat transmission equipment tube bank is arranged in the casing.
2, the Pintsch process descaling equipment of a kind of large-scale shell class heat transmission equipment tube bank according to claim 1 is characterized in that the heater that is provided with on the cabinet wall is resistance heating wire's a electric heater.
3, the Pintsch process descaling equipment of a kind of large-scale shell class heat transmission equipment tube bank according to claim 1 is characterized in that temperature difference supervising device is to have in the casing to be no less than the temperature thermocouple that 6 spaced points are provided with.
4, the Pintsch process descaling equipment of a kind of large-scale shell class heat transmission equipment tube bank according to claim 1, it is characterized in that spatial temperature distribution even regulation device is that the casing internal upper part is provided with wind pipe in the case, the high temperature resistant centrifugal fan air outlet outer with casing is connected, and place, nearly bottom has air draft pipe to be connected with air inlet in the casing.
5, the Pintsch process descaling equipment of a kind of large-scale shell class heat transmission equipment tube bank according to claim 1, it is characterized in that carrying heat transmission equipment tube bundle device is that cradle type supports in the casing, bogey is the holder car, and the wheel that is free to slide is arranged under the vehicle body, or track.
6, descaling method according to the described equipment of claim 1, it is characterized in that rear box heats shell class heat transmission equipment is whole with closed in the casing when shell class heat transmission equipment enters, according to the aerial burning-point operated by rotary motion of medium at 350～600 ℃, electric heater unit heats up in 30 ℃/h～50 ℃/h, with high temperature resistant centrifugal fan system forced action type to air circulation in the casing, heat up so that equipment is whole, homogeneous heating, and the temperature thermocouple that is provided with by many places in the casing, to heating-up temperature and everywhere the temperature difference monitor, control casing in everywhere maximum temperature difference be not more than 20 ℃, after heating 10～12 hours, the thickness in the tube bank, hard hydrocarbon foulant charing, liquefy flows out, or resolve into than the coke powder class material that is easier to clear up, clean restraining inside with the water under high pressure that is not less than 40MPa at last.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101004725A CN100425940C (en) | 2005-10-21 | 2005-10-21 | High temperature cracking descaling set and method for tube bundle in large shell-and-tube heat exchanger |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005101004725A CN100425940C (en) | 2005-10-21 | 2005-10-21 | High temperature cracking descaling set and method for tube bundle in large shell-and-tube heat exchanger |
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| Publication Number | Publication Date |
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| CN1811331A CN1811331A (en) | 2006-08-02 |
| CN100425940C true CN100425940C (en) | 2008-10-15 |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8136540B2 (en) | 2010-07-30 | 2012-03-20 | Hays Gary I | Cleaning system having heated cleaning enclosure for cleaning heat exchanger tube bundles |
| CN104654900B (en) * | 2014-03-13 | 2016-06-15 | 广西西创自动化有限公司 | The descaling method of evaporator |
| CN106768079B (en) * | 2017-02-22 | 2020-03-24 | 广州聚旭机电技术研究院有限公司 | Intelligent remote monitoring system for cleaning solution heat exchange |
| CN110193221B (en) * | 2019-05-20 | 2021-11-09 | 中国石化长城能源化工（宁夏）有限公司 | Method for cleaning filter cloth of plate-and-frame filter press of polytetrahydrofuran device |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2490317A1 (en) * | 1980-09-12 | 1982-03-19 | Mitsubishi Heavy Ind Ltd | Heat exchanger for rapid cooling of gas - which is fed up water:cooled tubes which are periodically de:coked by steam under conditions minimising thermal shock |
| US4376694A (en) * | 1979-06-08 | 1983-03-15 | Linde Aktiengesellschaft | Method of decoking a cracking plant |
| US4420343A (en) * | 1980-03-15 | 1983-12-13 | Basf Aktiengesellschaft | Process for the thermal decoking of cracked gas coolers |
| US4703793A (en) * | 1986-06-13 | 1987-11-03 | Sante Fe Braun Inc. | Minimizing coke buildup in transfer line heat exchangers |
| WO1993014364A1 (en) * | 1992-01-15 | 1993-07-22 | A. Ahlstrom Corporation | Method and apparatus for removing a deposit from the inlet duct wall of a gas cooler |
| US5437296A (en) * | 1994-06-07 | 1995-08-01 | Pure Oil Engineering & Consultants Company | Self-contained mobile heat exchange tube bundle cleaning device |
| CN1039241C (en) * | 1993-10-20 | 1998-07-22 | 施米特歇海斯多费有限公司 | Method for thermal removing coke from splitoven and split gas cooler connected behind oven |
| CN1643330A (en) * | 2002-03-15 | 2005-07-20 | 法国石油公司 | Method of at least partially removing carbon deposits from a heat exchanger |
| CN2828716Y (en) * | 2005-10-21 | 2006-10-18 | 中国石油化工股份有限公司 | High-temp cracking descale equipment for pipe bundle of large shell-and-tube heat exchanger |
-
2005
- 2005-10-21 CN CNB2005101004725A patent/CN100425940C/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4376694A (en) * | 1979-06-08 | 1983-03-15 | Linde Aktiengesellschaft | Method of decoking a cracking plant |
| US4420343A (en) * | 1980-03-15 | 1983-12-13 | Basf Aktiengesellschaft | Process for the thermal decoking of cracked gas coolers |
| FR2490317A1 (en) * | 1980-09-12 | 1982-03-19 | Mitsubishi Heavy Ind Ltd | Heat exchanger for rapid cooling of gas - which is fed up water:cooled tubes which are periodically de:coked by steam under conditions minimising thermal shock |
| US4703793A (en) * | 1986-06-13 | 1987-11-03 | Sante Fe Braun Inc. | Minimizing coke buildup in transfer line heat exchangers |
| WO1993014364A1 (en) * | 1992-01-15 | 1993-07-22 | A. Ahlstrom Corporation | Method and apparatus for removing a deposit from the inlet duct wall of a gas cooler |
| CN1039241C (en) * | 1993-10-20 | 1998-07-22 | 施米特歇海斯多费有限公司 | Method for thermal removing coke from splitoven and split gas cooler connected behind oven |
| US5437296A (en) * | 1994-06-07 | 1995-08-01 | Pure Oil Engineering & Consultants Company | Self-contained mobile heat exchange tube bundle cleaning device |
| CN1643330A (en) * | 2002-03-15 | 2005-07-20 | 法国石油公司 | Method of at least partially removing carbon deposits from a heat exchanger |
| CN2828716Y (en) * | 2005-10-21 | 2006-10-18 | 中国石油化工股份有限公司 | High-temp cracking descale equipment for pipe bundle of large shell-and-tube heat exchanger |
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| CN1811331A (en) | 2006-08-02 |
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