CN109027497B - Spiral flow drag reduction fluid transportation pipeline for petrochemical fluid heat exchange - Google Patents
Spiral flow drag reduction fluid transportation pipeline for petrochemical fluid heat exchange Download PDFInfo
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- CN109027497B CN109027497B CN201810995493.5A CN201810995493A CN109027497B CN 109027497 B CN109027497 B CN 109027497B CN 201810995493 A CN201810995493 A CN 201810995493A CN 109027497 B CN109027497 B CN 109027497B
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- support ring
- pipe body
- heat exchange
- heating
- temperature
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L53/00—Heating of pipes or pipe systems; Cooling of pipes or pipe systems
- F16L53/30—Heating of pipes or pipe systems
- F16L53/35—Ohmic-resistance heating
Abstract
The invention belongs to the technical field of transport pipelines, and particularly relates to a spiral flow resistance-reducing fluid transport pipeline for petrochemical fluid heat exchange, which comprises a pipe body, wherein spiral strips are annularly arranged on the outer wall of the pipe body, reinforcing ribs are arranged inside the spiral strips, a left connector is arranged at the left end of the pipe body, an embedded groove is formed in the left side of an inner cavity of the left connector, a right connector is arranged at the right end of the pipe body, an embedded ring is arranged on the right side wall of the right connector, and the structural strength and flexibility are improved through the arrangement of the reinforcing ribs; the embedded groove is matched with the embedded ring, so that the sealing performance is good, and the installation is convenient; the temperature of the specific position of each section can be measured through the arrangement of the temperature sensing equipment, so that the heating temperature can be regulated and controlled; through the setting of high temperature resistant lock ring, reduce electric heater unit and cause the damage to the support frame.
Description
Technical Field
The invention relates to the technical field of transport pipelines, in particular to a spiral flow drag reduction fluid transport pipeline for petrochemical fluid heat exchange.
Background
The transportation of industrial products or raw materials such as liquid or gas is carried out by four modes of road, railway, water transportation and pipeline transportation. Compared with other methods, the method has the characteristics of large transportation amount, small occupied area, safety in sealing, convenience in management, strong reliability, low energy consumption, low transportation cost and the like, and has outstanding advantages, so that the method is an ideal method for liquid or gas transportation at present.
The long-distance transportation pipeline is divided into an isothermal transportation pipeline and a heating transportation pipeline. The isothermal conveying pipeline is suitable for low-condensation-point and low-viscosity industrial raw materials or products in liquid or gaseous media. However, the industrial medium which is easy to congeal and high in viscosity is not suitable for isothermal transportation when the congealing point is higher than the ambient temperature of the pipeline or the viscosity of the medium is very high at the ambient temperature, such as chocolate, sulfur, crude oil, thick oil, high congealing oil, paraffin, isocyanate, various polymers and the like. The excessively high viscosity of the medium causes the pressure drop of the pipeline to be increased sharply, and the pressure drop is difficult to realize or uneconomical and unsafe in engineering, so that measures such as pour point depression, viscosity reduction and the like must be adopted. Heat transfer is currently the most common method. The heating transportation is different from the isothermal transportation in that there are two energy losses (friction loss and heat dissipation loss) during the transportation. The medium must therefore also be supplied with energy from two sides, typically by pumping stations for pressure energy and by heating stations or heat tracing pipes for heat energy. The heat tracing mode has good temperature uniformity, and can avoid the periodic change of the temperature of the medium along the process, so that the heat tracing mode has more advantages. Among the commonly used heat tracing methods are steam heat tracing, hot water heat tracing, and electric heat tracing, of which skin effect electric heat tracing is rapidly adopted due to its outstanding advantages.
In skin effect heat tracing, energy losses in fluid transport are reduced by reducing viscosity, but there is no control over flow in the pipe. The analysis of the fluid drag reduction principle shows that in the fluid flow, a certain flow control means is adopted to fluidize a turbulent layer or inhibit the flow direction of the layer from being changed to a transition region, the flow is controlled to be in a laminar state, the wall surface friction coefficient in the fluid transportation process is greatly reduced, and the flow resistance loss is further reduced. Therefore, in the transportation of the easily-condensed and high-viscosity fluid, the skin effect is combined with the flow control technology, so that the resistance loss in the fluid transportation can be further reduced.
For example, chinese patent publication No. CN104565592B discloses a heat-tracing turbulent laminar flow fluid-drag reduction transportation pipeline and a method thereof. The device is composed of a plurality of single-section conveying pipelines and a master controller, wherein each single-section conveying pipeline mainly comprises an arched pipeline, a fluid electric tracing pipe, a heat preservation layer, a pipe wall electric tracing pipe, a pipeline upper cover, a fluid temperature monitoring device, a wall temperature monitoring device and a temperature controller. Aiming at the heating and transportation of the existing easily-condensed and high-viscosity fluid, the invention combines the existing skin effect electric heat tracing technology with the flow resistance reduction control technology through the design of the arched fluid interface of the circular transportation pipeline, realizes the control of the fluidization flow state of the fluid turbulence layer near the fluid chord surface in the pipeline by maintaining the temperature difference between the arched pipeline wall surface and the fluid in the pipeline on the basis of eliminating condensation and reducing viscosity by utilizing the skin effect heat tracing technology, can further reduce the pressure drop loss in the fluid transportation process, improve the transportation efficiency and promote energy conservation and consumption reduction. But in use, the heating is relatively uneven and when heating problems occur, it is difficult to detect the location of the particular problem.
Disclosure of Invention
The invention aims to provide a spiral flow drag reduction fluid conveying pipeline for petrochemical fluid heat exchange, which aims to solve the problems that the existing conveying pipeline proposed in the background art is relatively uneven in heating and is difficult to detect the location of a specific problem when the heating problem occurs.
In order to achieve the purpose, the invention provides the following technical scheme: a spiral flow resistance-reducing fluid conveying pipeline for petrochemical fluid heat exchange comprises a pipe body, wherein spiral strips are annularly arranged on the outer wall of the pipe body, reinforcing ribs are arranged inside the spiral strips, a left connector is arranged at the left end of the pipe body, an embedded groove is formed in the left side of an inner cavity of the left connector, a right connector is arranged at the right end of the pipe body, an embedded ring is arranged on the right side wall of the right connector, support frames are arranged on the left side and the right side of the inner cavity of the pipe body, an electric heating device and a temperature sensing device are transversely arranged on the support frames, each support frame comprises an outer support ring, a heating support ring and a detection support ring, the detection support rings and the outer support rings are concentrically arranged, the heating support rings are distributed on the outer sides of the detection support rings in an equidistant mode, and the outer support rings, the heating support rings and the detection support, the electric heating device is inserted in the heating support ring, and the temperature sensing equipment is inserted in the detection support ring; the inner cavity of the heating support ring is embedded with a high-temperature-resistant support ring, and the high-temperature-resistant support ring is sleeved on the outer wall of the electric heating device.
Preferably, the pipe body and the spiral strip are integrally formed by injection molding, and the reinforcing rib is a spring steel reinforcing rib.
Preferably, the insertion groove is matched with the size of the insertion ring.
Preferably, the heating support rings are provided with four groups with the same structure, and the four groups of heating support rings are circumferentially and uniformly distributed on the outer side of the detection support ring.
Preferably, the outer wall of outer support ring is provided with the external screw thread, the inner chamber left and right sides of body all is provided with the internal thread of external screw thread looks adaptation.
Preferably, the temperature sensing device is a distributed optical fiber temperature sensor.
Compared with the prior art, the invention has the beneficial effects that: the spiral flow drag reduction fluid transportation pipeline for petrochemical fluid heat exchange has the following specific advantages:
1) the arrangement of the reinforcing ribs improves the structural strength and the flexibility;
2) the embedded groove is matched with the embedded ring, so that the sealing performance is good, and the installation is convenient;
3) the temperature of the specific position of each section can be measured through the arrangement of the temperature sensing equipment, so that the heating temperature can be regulated and controlled;
4) through the setting of high temperature resistant lock ring, reduce electric heater unit and cause the damage to the support frame.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic cross-sectional view of FIG. 1 according to the present invention;
FIG. 3 is a side view of the supporting frame of the present invention.
In the figure: the device comprises a pipe body 1, a spiral strip 2, a reinforcing rib strip 3, a left connector 4, an embedded groove 5, a right connector 6, an embedded ring 7, a support frame 8, an outer support ring 81, a heating support ring 82, a detection support ring 83, a support rod 84, an electric heating device 9 and temperature sensing equipment 10.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1-3, the present invention provides a technical solution: a spiral flow drag reduction fluid transportation pipeline for petrochemical fluid heat exchange comprises a pipe body 1, spiral strips 2 are annularly arranged on the outer wall of the pipe body 1, reinforcing ribs 3 are arranged inside the spiral strips 2, a left connector 4 is arranged at the left end of the pipe body 1, an embedded groove 5 is formed in the left side of an inner cavity of the left connector 4, a right connector 6 is arranged at the right end of the pipe body 1, an embedded ring 7 is arranged on the right side wall of the right connector 6, support frames 8 are arranged on the left side and the right side of the inner cavity of the pipe body 1, an electric heating device 9 and a temperature sensing device 10 are transversely arranged on each support frame 8, each support frame 8 comprises an outer support ring 81, a heating support ring 82 and a detection support ring 83, the detection support ring 83 and the outer support ring 81 are concentrically arranged, the heating support rings 82 are distributed on the outer side of the detection support ring 83 in an equidistant manner, the outer support ring 81, the heating support ring, the electric heating device 9 is inserted into the heating support ring 82, and the temperature sensing device 10 is inserted into the detection support ring 83.
Wherein, the pipe body 1 and the spiral strip 2 are integrally formed by injection molding, the integrity is better, the reinforcing rib 3 is a spring steel reinforcing rib, the structural strength and the toughness are ensured, the size of the embedded groove 5 is matched with that of the embedded ring 7, and the embedded groove and the embedded ring can be combined and connected, when in connection, the sealing rings are embedded, which is convenient for installation and sealing, four groups of the heating support rings 82 with the same structure are arranged, and the four groups of heating support rings 82 are circumferentially and uniformly distributed at the outer side of the detection support ring 83, can be uniformly heated, the inner cavity of the heating support ring 82 is embedded with a high temperature resistant support ring, and the high temperature resistant support ring is sleeved on the outer wall of the electric heating device 9, the outer wall of the outer support ring 81 is provided with external threads, the left side and the right side of the inner cavity of the pipe body 1 are both provided with internal threads matched with the external threads, and the temperature sensing equipment 10 is a distributed optical fiber temperature sensor and has the function of positioning and measuring temperature, so that the heating mode of the electric heating device 9 is controlled at a fixed point.
The working principle is as follows: the body 1 is the insulating tube (like double-deck vacuum tube), and during the combination, the embedded groove 5 with a set of pipeline that transports corresponds another 7 of group pipeline that transport to through bolted connection between the left connector 4 that will two sets of pipeline that transport correspond and the right connector 6, electric heater unit 9 adopts resistance wire heating equipment, and circular telegram back resistance generates heat and reduces viscosity to inside transportation liquid, thereby can conveniently transport.
The temperature monitoring, temperature sensing equipment 10 is located the middle part of body 1, can relate to and monitor the temperature in the inside most region of body 1, and temperature sensing equipment 10 utilizes optic fibre as sensing sensitive element and transmission signal medium simultaneously, adopts advanced otdr technique, detects the change along the temperature and the strain of temperature sensing equipment 10 different positions, realizes real distributed measurement. The principle of micro optics temperature measurement is a distributed temperature sensing system based on the raman scattering effect; the strain measurement principle is a distributed temperature and strain sensing system based on Brillouin scattering, which can simultaneously measure temperature and strain, the measured temperature is within a set temperature value range, the temperature is considered to be normal, and if the measured temperature is not within the set temperature value range, the heating power of the electric heating device 9 is changed by changing the voltage of the electric heating device 9, so that the temperature is raised or lowered.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a petrochemical fluid spiral flow drag reduction fluid transport pipeline for heat transfer, includes body (1), its characterized in that: the outer wall of the pipe body (1) is annularly provided with a spiral strip (2), a reinforcing rib strip (3) is arranged inside the spiral strip (2), the left end of the pipe body (1) is provided with a left connector (4), the left side of the inner cavity of the left connector (4) is provided with an embedded groove (5), the right end of the pipe body (1) is provided with a right connector (6), the right side wall of the right connector (6) is provided with an embedded ring (7), the left side and the right side of the inner cavity of the pipe body (1) are respectively provided with a support frame (8), an electric heating device (9) and a temperature sensing device (10) are transversely arranged on the support frame (8), the support frame (8) comprises an outer support ring (81), a heating support ring (82) and a detection support ring (83), the detection support ring (83) and the outer support ring (81) are concentrically arranged, and the heating support ring (82) is distributed outside the detection support ring (83) in an equidistant, the outer support ring (81), the heating support ring (82) and the detection support ring (83) are connected through a support rod (84), the electric heating device (9) is inserted into the heating support ring (82), and the temperature sensing equipment (10) is inserted into the detection support ring (83); the inner cavity of the heating support ring (82) is embedded with a high-temperature-resistant support ring, and the high-temperature-resistant support ring is sleeved on the outer wall of the electric heating device (9).
2. The spiral flow drag reduction fluid transport pipeline for petrochemical fluid heat exchange according to claim 1, characterized in that: the pipe body (1) and the spiral strips (2) are integrally formed in an injection molding mode, and the reinforcing ribs (3) are spring steel reinforcing ribs.
3. The spiral flow drag reduction fluid transport pipeline for petrochemical fluid heat exchange according to claim 1, characterized in that: the embedding groove (5) is matched with the size of the embedding ring (7).
4. The spiral flow drag reduction fluid transport pipeline for petrochemical fluid heat exchange according to claim 1, characterized in that: the heating support rings (82) are provided with four groups with the same structure, and the four groups of heating support rings (82) are uniformly distributed on the outer side of the detection support ring (83) in the circumferential direction.
5. The spiral flow drag reduction fluid transport pipeline for petrochemical fluid heat exchange according to claim 1, characterized in that: the outer wall of outer support circle (81) is provided with the external screw thread, the inner chamber left and right sides of body (1) all is provided with the internal thread of external screw thread looks adaptation.
6. The spiral flow drag reduction fluid transport pipeline for petrochemical fluid heat exchange according to claim 1, characterized in that: the temperature sensing device (10) is a distributed optical fiber temperature sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810995493.5A CN109027497B (en) | 2018-08-29 | 2018-08-29 | Spiral flow drag reduction fluid transportation pipeline for petrochemical fluid heat exchange |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810995493.5A CN109027497B (en) | 2018-08-29 | 2018-08-29 | Spiral flow drag reduction fluid transportation pipeline for petrochemical fluid heat exchange |
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| Publication Number | Publication Date |
|---|---|
| CN109027497A CN109027497A (en) | 2018-12-18 |
| CN109027497B true CN109027497B (en) | 2021-04-13 |
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| CN201810995493.5A Expired - Fee Related CN109027497B (en) | 2018-08-29 | 2018-08-29 | Spiral flow drag reduction fluid transportation pipeline for petrochemical fluid heat exchange |
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| CN113357536A (en) * | 2021-06-29 | 2021-09-07 | 广船国际有限公司 | LNG fuel conveying structure and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2583565Y (en) * | 2002-10-14 | 2003-10-29 | 魏秀岩 | Carbon fibre metal pipe heater |
| US7549319B2 (en) * | 2006-11-16 | 2009-06-23 | Halliburton Energy Services, Inc. | High pressure resonant vibrating-tube densitometer |
| CN102322551B (en) * | 2011-08-23 | 2013-11-13 | 深圳金鸿机械电气制造有限公司 | Reinforced thermoplastic composite structure wall pipe and strip and complete-set production device thereof |
| FR3015172B1 (en) * | 2013-12-12 | 2019-05-10 | Total Sa | ELECTRICAL HEATING DEVICE |
| EP3140365B1 (en) * | 2014-05-07 | 2023-03-22 | Glen R. Sumner | Submarine or buried piping and pipelines insulated with liquids |
| CN204085273U (en) * | 2014-07-07 | 2015-01-07 | 杨积文 | Column heat transfer unit (HTU) and the pipeline for flowing material heat transfer |
| CN104565592B (en) * | 2015-01-23 | 2016-06-15 | 浙江大学 | A kind of heat tracing type turbosphere fluidisation drag reducing fluid conveying pipe and method thereof |
| GB2535145B (en) * | 2015-02-03 | 2017-10-18 | Acergy France SAS | Termination bulkheads for subsea pipe-in-pipe systems |
| CN205136860U (en) * | 2015-04-08 | 2016-04-06 | 刘嵩 | Compound pipe of plastic steel strengthening rib polyethylene |
| CN205479981U (en) * | 2016-01-23 | 2016-08-17 | 山西青科恒安矿业新材料有限公司 | Inlay type strengthening rib spiral weld pipe |
| CN205371928U (en) * | 2016-03-01 | 2016-07-06 | 辽宁新斯盾油品有限公司 | Lubricant production is with gluing thick feed line way |
| CN205402070U (en) * | 2016-03-07 | 2016-07-27 | 江苏新海石化有限公司 | Petroleum pipeline with prevent that crude oil from solidifying |
| CN106304446B (en) * | 2016-10-14 | 2023-05-05 | 吉林大学 | Electric heater for fluid in well |
| CN107940240A (en) * | 2017-12-19 | 2018-04-20 | 成都大漠石油技术有限公司 | A kind of vacuum type liquid heats transport pipeline |
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