WO2017016187A1 - 常压塔顶油气换热装置及换热方法 - Google Patents
常压塔顶油气换热装置及换热方法 Download PDFInfo
- Publication number
- WO2017016187A1 WO2017016187A1 PCT/CN2016/000416 CN2016000416W WO2017016187A1 WO 2017016187 A1 WO2017016187 A1 WO 2017016187A1 CN 2016000416 W CN2016000416 W CN 2016000416W WO 2017016187 A1 WO2017016187 A1 WO 2017016187A1
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- WIPO (PCT)
- Prior art keywords
- water injection
- heat exchange
- oil
- shell
- casing
- Prior art date
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G9/00—Thermal non-catalytic cracking, in the absence of hydrogen, of hydrocarbon oils
- C10G9/14—Thermal non-catalytic cracking, in the absence of hydrogen, of hydrocarbon oils in pipes or coils with or without auxiliary means, e.g. digesters, soaking drums, expansion means
- C10G9/18—Apparatus
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/0066—Multi-circuit heat-exchangers, e.g. integrating different heat exchange sections in the same unit or heat-exchangers for more than two fluids
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F19/00—Preventing the formation of deposits or corrosion, e.g. by using filters or scrapers
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
- F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
- F28F21/081—Heat exchange elements made from metals or metal alloys
- F28F21/086—Heat exchange elements made from metals or metal alloys from titanium or titanium alloys
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
- F28F27/02—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus for controlling the distribution of heat-exchange media between different channels
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/0246—Arrangements for connecting header boxes with flow lines
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28G—CLEANING OF INTERNAL OR EXTERNAL SURFACES OF HEAT-EXCHANGE OR HEAT-TRANSFER CONDUITS, e.g. WATER TUBES OR BOILERS
- F28G9/00—Cleaning by flushing or washing, e.g. with chemical solvents
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
- F28D2021/0059—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for petrochemical plants
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/02—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being helically coiled
- F28D7/024—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being helically coiled the conduits of only one medium being helically coiled tubes, the coils having a cylindrical configuration
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D7/00—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D7/16—Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits being arranged in parallel spaced relation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2265/00—Safety or protection arrangements; Arrangements for preventing malfunction
- F28F2265/22—Safety or protection arrangements; Arrangements for preventing malfunction for draining
Definitions
- the invention relates to a chemical equipment and a chemical process, in particular to an atmospheric pressure tower top oil and gas heat exchange device and a heat exchange method.
- the atmospheric and vacuum distillation unit cuts crude oil into fractions such as naphtha, jet coal, diesel oil, kerosene and vacuum residue by distillation according to the boiling point of each component, and its distillation technology level and device Smooth and efficient operation is directly related to the output value and economic benefits of subsequent devices.
- the quality of world crude oil has generally declined, the global light crude oil output has declined; the sulfur content has continued to rise; the acidity of oil has increased; the difficulty of mining has resulted in a large amount of Cl-containing additives in processing crude oil.
- the construction of the device generally adopts materials upgrade and strengthen the process of anti-corrosion "one off three injections" measures to alleviate the corrosion problem, but the corrosion leakage of the top heat exchanger is still serious.
- the top heat exchangers are mostly ordinary heat exchangers.
- the material grade has been improved due to the anti-corrosion requirements, many of them still cannot run for a long period of time.
- the tube bundles are easy to corrode and leak, and some of them use welded plate heat exchangers.
- the self-resistance is poor, and the circulation channel is small, which is prone to channel blockage and leakage.
- the technical problem to be solved by the present invention is to provide an atmospheric pressure tower top oil and gas heat exchange device capable of effectively avoiding clogging of a heat exchanger according to the current state of the art, thereby achieving the purpose of avoiding equipment corrosion, prolonging operation cycle, and reducing operating cost.
- Another technical problem to be solved by the present invention is to provide an atmospheric pressure tower top oil and gas heat exchange method capable of effectively preventing heat exchanger clogging in view of the current state of the art.
- the atmospheric pressure tower top oil and gas heat exchange device comprises a heat exchanger
- the heat exchanger comprises a casing, an upper tube plate and a lower tube plate in the casing, and a support a heat exchange tube on the upper and lower tube sheets
- an inlet connection of each of the heat exchange tubes is disposed at a tube inlet inlet at a bottom of the housing
- an outlet connection of each of the heat exchange tubes is disposed at a top of the housing a pipe outlet
- the pipe outlet and the inlet are used for connecting the crude oil, and at the upper part of the casing, a shell-side inlet for connecting the atmospheric oil and gas pipeline at the top of the atmospheric pressure is provided, and the shell-side outlet is disposed at a lower portion of the casing , which is characterized by:
- the upper part of the casing is further provided with a water injection coil connected to the external water injection pipeline, and the water injection coil is provided with a plurality of water holes communicating with the inside of the casing; the atmospheric pressure tower top oil and gas pipeline passes the first water injection
- the pipeline and the third water injection pipeline are connected to the external water injection pipeline; the first water injection pipeline and the third water injection pipeline are respectively provided with a first electromagnetic valve and a second electromagnetic valve; and the water injection coil is connected to the outside through the second water injection pipeline Water injection line.
- a water injection port is provided on the casing, and the external water injection line and the water injection coil are connected through the water injection port.
- the water injection coil is located below the upper tube sheet and adjacent to the upper tube sheet.
- a heat exchange tube located between the upper tube sheet and the lower tube sheet is coiled along a central axis of the housing.
- the top of the casing is further provided with an exhaust port communicating with the inside of the casing for exhausting the top gas in the casing during maintenance; the bottom of the casing is provided with a liquid at the bottom of the casing for maintenance The drain port.
- Each of the heat exchange tubes is a pure titanium heat exchange tube.
- the crude oil enters the heat exchange tube of the heat exchanger, and the oil at the top of the atmospheric pressure is mixed into the first water injection and enters the shell of the heat exchanger, and after the heat exchange with the crude oil, the heat exchanger is discharged to the downstream; wherein the crude oil
- the ratio of the flow rate of the oil and gas at the top of the atmospheric pressure is 4 to 5:1, the first water injection amount is 2 to 3% of the oil and gas flow at the top of the atmospheric pressure tower; and the temperature of the oil and gas at the top of the atmospheric pressure is 120 to 150 °C, the pressure is 0.10-0.15MPaG, the temperature of the first water injection is 30-50 ° C, the pressure is 2.0-2.5 MPaG, and the temperature of the shell-side outlet after heat exchange is 80-85 ° C;
- the second water injection continuously enters the water injection coil 6 and is sprayed from the water holes 61 into the casing; the flow ratio of the second water injection to the first water injection is 3 to 4:1 , the temperature of the second water injection is 30-50 ° C;
- the third water injection intermittently enters the atmospheric pressure overhead oil and gas pipeline 2, and enters the shell side from the shell inlet; the flow ratio of the third water injection to the first water injection is 8-12:1, and the temperature of the third water injection is 30-50 ° C, water injection duration is 25-35 min, water injection cycle is 80-100 min.
- the atmospheric pressure tower top oil and gas heat exchange device and the heat exchange method provided by the invention effectively improve the heat exchange efficiency and the anti-scaling performance by distributing water to the oil and gas pipeline and flushing the shell through the water injection coil. It is resistant to HCl-H 2 SH 2 O corrosion and corrosion under scale; it avoids stubborn phenomena such as corrosion of ammonium salt and ferrous sulfide blockage, and solves the problem of corrosion and leakage of Changding oil/oil heat exchanger due to corrosion.
- the problems such as frequent plugging and even replacement of equipment caused by blockage and other factors, and small pressure drop and stable operation greatly improve the safe operation cycle of the device.
- FIG. 1 is a schematic plan view of a heat exchanger according to an embodiment of the present invention.
- Figure 3 is a view taken along line A in Figure 1;
- Figure 4 is a B-direction view of Figure 1;
- Figure 5 is a longitudinal cross-sectional view of Figure 1.
- the atmospheric pressure tower top oil and gas heat exchange device includes:
- the heat exchanger 1 includes a casing 11 , and a top portion of the casing 11 is provided with a pipe outlet 18 communicating with each heat exchange tube 5 and a water injection port 15 communicating with the second water injection line 32, and is connected to the casing.
- the exhaust port 10 of the heat exchanger is provided with a shell-side inlet 12 on the side wall of the upper head of the heat exchanger; the bottom of the casing 11 is spaced apart from the tube inlet 13 communicating with each heat exchange tube 5, and is connected to the inside of the casing.
- the shell side outlet 14 and the liquid discharge port 19 are opened.
- An upper tube sheet 16 and a lower tube sheet 17 are also provided in the housing 11.
- each heat exchange tube there are a plurality of heat exchange tubes 5, all of which are pure titanium heat exchange tubes to ensure the corrosion resistance of the heat exchange tubes.
- the upper and lower ends of each heat exchange tube are respectively fixed on the upper and lower tube sheets, and the portions of the heat exchange tubes between the upper tube sheet 16 and the lower tube sheet 17 are spirally wound along the central axis of the housing 11 to Improve heat transfer efficiency.
- the water injection coil 6 is disposed in the casing 11 and is located below the upper tube sheet 16; the water injection coil 6 has a plurality of water holes 61 communicating with the inside of the casing.
- the inlet of the water injection coil 6 is connected to the second water injection line 32 through the water injection port 15.
- the shell inlet 12 is connected to the atmospheric oil line 2 at the top of the atmospheric pressure, and the first water injection line 31 and the third water injection line 33 are connected to the oil and gas pipeline 2 at the top of the atmospheric pressure.
- the first water injection line 31 and the third water injection line 33 are connected to the external water injection.
- Line 3; and a first solenoid valve 34 and a second solenoid valve 35 are provided on the first water injection line 31 and the third water injection line 33, respectively.
- the first water injection line 31 replenishes the water in the atmospheric pressure tower top oil and gas pipeline 2, and the electromagnetic valve is used to adjust the water flow rate; the third water injection pipeline is used to intermittently inject water into the atmospheric pressure tower top oil and gas pipeline 2, so as to facilitate the large flow flushing of the shell side.
- the first water injection line 31 and the third water injection line 33 are both connected to the external water injection line 3, and the first water injection line 31 and the third water injection line 33 are provided with electromagnetic valves, and the two electromagnetic valves are connected to the control system (not shown) Out), the control system controls the opening and closing of the two solenoid valves and the valve opening degree, thereby controlling the water injection of each water injection line.
- the heat exchange method using the above-mentioned atmospheric pressure tower top oil and gas heat exchange device includes the following steps;
- the crude oil enters the heat exchange tubes from the inlet of the pipe through the crude oil pipeline 7.
- the oil and gas from the atmospheric pressure tower of the atmospheric pressure tower 8 is mixed into the first water injection and enters the shell of the heat exchanger from the shell inlet, and exchanges heat with the crude oil.
- the atmospheric pressure tower top oil and gas flow is 43860kg/h, the temperature is 125°C, the pressure is 0.11MPaG, the heat exchange outlet temperature is 82°C; the first water injection volume is 1000kg/h, the temperature is 40°C; The crude oil flow rate is 192,400 kg/h, the inlet temperature is 32 ° C, the pressure is 2.1 MPaG, and the outlet temperature after heat exchange is 72 ° C.
- the second water injection continuously enters the water injection coil 6 and is sprayed from the water holes 61 into the casing; the water for controlling the second water injection is 3000-4000 kg/h, and the temperature is 40 ° C;
- the third water injection intermittently enters the atmospheric pressure tower top oil and gas pipeline 2, and the third water injection amount is controlled to be 10000 kg/h.
- the temperature is 40 ° C
- the water injection duration is 30 min
- the water injection period is 90 min.
- the flow rate and working time of the first and third water injections are controlled by two corresponding solenoid valves.
- the medium in the equipment should be drained, and the exhaust port 10 should be opened to discharge the Changding oil and gas collected in the upper part of the casing. After the device is cut out, it is cleaned, the cleaning liquid is injected from the exhaust port 10, and the liquid discharge port 19 discharges the cleaning liquid.
- the service life of the conventional general top heat exchanger is about 1 to 2 years. After the corrosion leaks, the tube bundle needs to be replaced or replaced as a whole;
- the heat exchange device and the heat exchange method of the invention impart good corrosion resistance and anti-fouling performance to the apparatus body, and no problem of fouling blockage and corrosion leakage occur within 8 years of two operating cycles, thereby saving a large amount of equipment replacement and maintenance costs. .
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- Engineering & Computer Science (AREA)
- Thermal Sciences (AREA)
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- General Engineering & Computer Science (AREA)
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- Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Combustion & Propulsion (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
- Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
Abstract
Description
Claims (7)
- 一种常压塔顶油气换热装置,包括换热器(1),所述换热器包括壳体(11)、位于壳体(11)内的上管板(16)和下管板(17)以及支撑在上、下管板上的换热管(5),各所述换热管(5)的入口连接设置在所述壳体底部的管程入口(13),各所述换热管(5)的出口连接设置在所述壳体顶部的管程出口(18);所述管程出、入口用于连接原油,同时在壳体(11)的上部设有用于连接常压塔顶油气管线(2)的壳程入口,壳程出口设置在所述壳体的下部,其特征在于:所述壳体(11)内的上部还设有与外界注水管线(3)相连接的注水盘管(6),所述注水盘管(6)上设有多个连通壳体内部的水孔(61);所述常压塔顶油气管线(2)通过第一注水管线(31)和第三注水管线(33)连接所述外界注水管线(3);所述第一注水管线(31)和第三注水管线(33)上分别设有第一电磁阀(34)和第二电磁阀(35);所述注水盘管(6)通过第二注水管线(32)联接外界注水管线(3)。
- 根据权利要求1所述的常压塔顶油气换热装置,其特征在于所述壳体(11)上设有注水口(15),所述外界注水管线(3)和所述注水盘管(6)通过所述注水口(15)相连通。
- 根据权利要求1或2所述的常压塔顶油气换热装置,其特征在于所述注水盘管(4)位于所述上管板(16)的下方并靠近所述上管板(16)。
- 根据权利要求3所述的常压塔顶油气换热装置,其特征在于位于所述上管板(16)和下管板(17)之间的换热管(5)沿所述壳体(11)的中心轴线盘绕设置。
- 根据权利要求3所述的常压塔顶油气换热装置,其特征在于所述壳体(11)的顶部还设有与所述壳体内部相连通的用于检修时排净壳体内顶部气体的排气口(10);所述壳体(11)的底部设有用于检修时排净壳体内底部液体的排液口(19)。
- 根据权利要求3所述的常压塔顶油气换热装置,其特征在于各所述换热管为纯钛换热管。
- 使用如权利要求1至6任一权利要求所述的常压塔顶油气换热装置的换热方法,其特征在于包括下述步骤:原油进入所述换热器的换热管,常压塔顶油气混入第一股注水后进入所述换热器的壳体内,与原油换热后排出换热器进入下游;其中,所述原油与所述常压塔顶油气的流量比为4~5∶1,所述第一股注水量为常压塔顶油气流量的2~3%;所述常压塔顶油气的温度120~150℃、压力为0.10~0.15MPaG,所述第一股注水的温度30-50℃,压力2.0-2.5MPaG,换热后壳程出口的温度为80-85℃;第二股注水连续进入所述注水盘管(6),从各所述水孔(61)喷淋到所述壳体内;所述第二股注水的流量与第一股注水的流量比为3~4∶1,第二股注水的温度30-50℃;第三股注水间歇进入常压塔顶油气管线2,从壳程入口进入壳程;所述第三股注水与第一股注水的流量比为8-12∶1,第三股注水的温度为30-50℃,注水持续时间为25-35min,注水周期为80-100min。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
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KR1020177001699A KR101848697B1 (ko) | 2015-07-30 | 2016-07-26 | 상압 탑 오일가스 열교환 장치 및 열교환 방법 |
EP16829559.0A EP3171110B1 (en) | 2015-07-30 | 2016-07-26 | Atmospheric distillation column overhead oil-gas heat exchange apparatus and heat exchange method |
JP2017506929A JP6315869B2 (ja) | 2015-07-30 | 2016-07-26 | 常圧蒸留装置塔頂オイルガス熱交換装置及び熱交換方法 |
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CN201510460303.6 | 2015-07-30 | ||
CN201510460303.6A CN104964583B (zh) | 2015-07-30 | 2015-07-30 | 常压塔顶油气换热装置及换热方法 |
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CN106840905A (zh) * | 2017-04-20 | 2017-06-13 | 重庆科技学院 | 油气管道压力综合教学实验装置 |
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WO2024066519A1 (zh) * | 2022-09-30 | 2024-04-04 | 镇海石化建安工程股份有限公司 | 一种用于加氢装置的换热组件及换热工艺 |
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JP6933238B2 (ja) * | 2018-12-27 | 2021-09-08 | 栗田工業株式会社 | 蒸留塔の差圧解消方法 |
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CN110373222B (zh) * | 2019-07-29 | 2024-06-14 | 镇海石化建安工程股份有限公司 | 一种具有缠绕管式换热器的常减压换热系统及换热工艺 |
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CN106840905B (zh) * | 2017-04-20 | 2023-04-07 | 重庆科技学院 | 油气管道压力综合教学实验装置 |
CN114440698A (zh) * | 2020-11-05 | 2022-05-06 | 南京科技职业学院 | 一种脱脂碱洗换热器减少管式炉烧穿炉门的方法 |
WO2024066519A1 (zh) * | 2022-09-30 | 2024-04-04 | 镇海石化建安工程股份有限公司 | 一种用于加氢装置的换热组件及换热工艺 |
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KR20170023989A (ko) | 2017-03-06 |
EP3171110A4 (en) | 2018-04-18 |
EP3171110B1 (en) | 2019-03-27 |
JP2017532388A (ja) | 2017-11-02 |
CN104964583A (zh) | 2015-10-07 |
JP6315869B2 (ja) | 2018-04-25 |
CN104964583B (zh) | 2017-01-11 |
EP3171110A1 (en) | 2017-05-24 |
KR101848697B1 (ko) | 2018-05-28 |
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