CN103727349B - A kind of process replacing jacket hot tracing mode by outer heat tracing pipe heat tracing mode - Google Patents

A kind of process replacing jacket hot tracing mode by outer heat tracing pipe heat tracing mode Download PDF

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Publication number
CN103727349B
CN103727349B CN201410031143.9A CN201410031143A CN103727349B CN 103727349 B CN103727349 B CN 103727349B CN 201410031143 A CN201410031143 A CN 201410031143A CN 103727349 B CN103727349 B CN 103727349B
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China
Prior art keywords
heat
heat tracing
pipe
tracing
tracing pipe
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Ceased
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CN201410031143.9A
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Chinese (zh)
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CN103727349A (en
Inventor
陈树存
毛羽丰
许强军
张宁
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BEIJING PAINUOMENG ENERGY TECHNOLOGY Co Ltd
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BEIJING PAINUOMENG ENERGY TECHNOLOGY Co Ltd
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Classifications

    • 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
    • F16L53/34—Heating of pipes or pipe systems using electric, magnetic or electromagnetic fields, e.g. using induction, dielectric or microwave heating
    • 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

Abstract

A kind of process replacing jacket hot tracing mode by outer heat tracing pipe heat tracing mode, it has four big steps: one, according to various manufacturing technique requirents and local climate environmental condition, the radical of heat tracing pipe in HTT SUPERSEDE tracing system is calculated further according to heat tracing caliber and heat tracing pipe radical computing formula in petrochemical plant process pipe mounting design handbook, and carry out checking and approving correction to result of calculation through ANYSYS FEM Numerical Simulation again: two, according to chemical anticorrosion requirement, respectively materail tube and heat tracing pipe are carried out anticorrosion；Three, heat-conducting daub need to be tamped and the most floating with materail tube both sides along heat tracing pipe when pipeline tracing is constructed, be filled in full for this heat-conducting daub in U-shaped groove the most again, be buckled on outer heat tracing pipe, use stainless steel silk to tighten；Four, after painting wipes heat-conducting daub 24h, according to design code, heat-insulation layer is installed.The present invention is a kind of process improving heat-transfer effect and simplicity.

Description

A kind of process replacing jacket hot tracing mode by outer heat tracing pipe heat tracing mode
Technical field
The present invention relates to a kind of process replacing jacket hot tracing mode by outer heat tracing pipe heat tracing mode, the method, be Outside the inorganic Heat Conduction Material (HTT-SD800/99LC) a kind of high temperature resistant, good heat conductivity utilizing high temperature heat transfer field is filled in Heat tracing pipe, with the gap of materail tube, strengthens heat tracing effect, replaces jacket hot tracing.Belong to oil, chemical industry technical field of heat exchange.
Technical background
In oil, chemical industry, electric power, national defense industry, pipeline transportation heat tracing and heat-exchange apparatus adjoining pipe to be used, electricity companion Heat pipe (carrying) and sleeve pipe, but adjoining pipe and electric tracing tube (carrying) are mostly by cross-ventilation and radiant heat transfer, and heat transfer efficiency is the highest, heat waste Consumption is relatively big, uses jacket pipe, and heat transfer efficiency is higher, and thermal losses is low, but construction, installation difficulty are relatively big, especially bend coil pipe, valve Door and flange etc..Therefore adjoining pipe, need between electric tracing tube (carrying) and materail tube or heat exchanger fill highly heat-conductive material, make Adjoining pipe, electric tracing tube (carrying) are in close contact with materail tube or heat exchanger, to increase contact area, and spoke before replacing with conduction of heat Penetrate heat transfer and convection heat transfer' heat-transfer by convection, augmentation of heat transfer, improve heat-transfer effect, so that outer heat tracing pipe heat tracing can substitute for the side of jacket hot tracing Formula.
The most domestic product having a few money heat-conducting daub, but mostly simply sell heat-conducting daub, not for specific work Skill formulates specific products and heat tracing scheme, the most rough promotes to user by heat-conducting daub, is not bound with production technology by heat conduction Clay characteristic and advantage fully play out.Beijing Pai Nuomeng Energy Science Co., Ltd produces a HTT-SD800/ specially 99LC is used for coordinating outer heat tracing pipe to use and replaces original jacket hot tracing, wherein have also been devised the guarantor made for heat tracing pipe diameter Construction adnexa 3d (d the is outer heat tracing pipe diameter) U-type groove of card heat-conducting area, and protect for fixing the confinement band of heat-conducting daub The heat tracing effect demonstrate,proving whole outer tracing system can reach the heat tracing effect of jacket hot tracing system, and this heat tracing mode is referred to as HTT- SUPERSEDE。
Summary of the invention
1, purpose: it is an object of the invention to provide a kind of technique replacing jacket hot tracing mode by outer heat tracing pipe heat tracing mode Method, which overcomes the deficiencies in the prior art, is a kind of augmentation of heat transfer, improves heat-transfer effect and the process of simplicity.
2, technical scheme: to achieve the object of the present invention, takes techniques below scheme to realize:
A kind of process replacing jacket hot tracing mode by outer heat tracing pipe heat tracing mode of the present invention, the method concrete steps As follows:
Step one: according to conditions such as various manufacturing technique requirents and local climate environment, further according to petrochemical plant work In skill tubing mounting designs handbook, heat tracing caliber and heat tracing pipe radical computing formula calculate HTT-SUPERSEDE tracing system The radical of middle heat tracing pipe, and carry out checking and approving correction to result of calculation through ANYSYS FEM Numerical Simulation again.
Heat tracing pipe external diameter required for outer heat tracing pipe
d = k ( t - t a ) ( 1 2 λ ln D 0 D i + 1 α D 0 + 1 α i D i ) α t ( t st - t )
Heat tracing pipe radical
n ≥ d d 0
In formula:
D0---heat-insulation layer external diameter, m；
Di---warp in heat-insulation layer, m；
D---heat tracing pipe calculates external diameter, m；
d0---heat tracing pipe actual outside diameter, m；
K---heat loss additional coefficient；Typically take 1.15-1.25；
N---heat tracing pipe radical, root；
α---heat-insulation layer appearance is towards the exothermic coefficient of air；w/m·k；
VwWind speed, m/s；
αi---in heat-insulation layer, heating space air is to the exothermic coefficient of heat-insulation layer, typically takes αi=13.95w/m·k；
αt---heat tracing pipe adds the exothermic coefficient of heat space, w/m k in heat-insulation layer；
T---medium temperature in supervisor, DEG C；
tst---medium temperature in heat tracing pipe, DEG C；
ta---ambient temperature, DEG C；
Step 2: according to chemical anticorrosion requirement, carries out anticorrosion to materail tube and heat tracing pipe respectively.
Step 3: as shown in Figure 2: when pipeline tracing is constructed need to by HTT-SD800/99LC heat-conducting daub along heat tracing pipe with Materail tube both sides are tamped and the most floating, are filled in U-shaped ditch by full for HTT-SD800/99LC heat-conducting daub the most again In groove, being buckled on outer heat tracing pipe, use stainless steel silk to tighten, every meter of U-shaped groove ties up 2-3 road.To elbow or flange length not To 1m can arbitrarily the U-shaped groove of cutting to appropriate length.Avoiding the occurrence of bubble and space, HTT-SD800/99LC heat-conducting daub should be by Heat tracing pipe is fully wrapped around, and construction thickness is 7-10mm.
As shown in Figure 3: apply HTT-SD800/99LC heat-conducting daub to be wrapped up by heat tracing pipe when equipment heat tracing is constructed, thickness For 7-10mm.The interface width of HTT-SD800/99LC heat-conducting daub and equipment is about about 3 times of heat tracing pipe diameter.Such as companion When heat pipe average headway is less than 50mm, it is contemplated that use whole applying to smear closely knit form of construction work.
Step 4: be coated with after wiping heat-conducting daub 24h, can install heat-insulation layer according to design code.
3, advantage and effect: a kind of process replacing jacket hot tracing mode by outer heat tracing pipe heat tracing mode of the present invention, Its advantage is:
This invention can replace jacket hot tracing mode for different technological requirement design outer heat tracing pipe heat tracing modes in detail Scheme so that heat tracing scheme is flexible, with strong points.The method can be forgone, and jacket pipe tracing system difficulty of construction is big, welding Difficult quality guarantee, investment are big, process pipe causes leakage to be but difficult to check leak source because of reasons such as burn into are aging, therefore safeguard Extremely difficult with maintenance；Traditional outer tube tracing system shortcoming is that heat tracing pipe is linear contact lay with process pipe or does not contacts, because of This heat transfer area is little, heat tracing medium heat waste big, heating surface non-uniform temperature, and whole tracing system heat transfer efficiency is low, heat tracing effect Difference.It is little that the present invention has investment, easy construction, safeguard and overhaul conveniently, low cost, and can have that heat transfer area is big, heat tracing Medium heat loss is little, heat transfer is uniformly greatly improved the advantages such as heat tracing effect, final replacement jacket pipe heat tracing mode.
Accompanying drawing illustrates:
Fig. 1 is HTT-SUPERSEDE heat tracing section of structure
Fig. 2 is pipeline construction figure
Fig. 3 is external heat coil pipe construction drawing
Fig. 4 is FB(flow block) of the present invention
Detailed description of the invention
See Fig. 1 Fig. 4, a kind of process replacing jacket hot tracing mode by outer heat tracing pipe heat tracing mode of the present invention, should Method specifically comprises the following steps that
Step one: according to conditions such as various manufacturing technique requirents and local climate environment:
Further according to heat tracing caliber and heat tracing pipe radical computing formula in petrochemical plant process pipe mounting design handbook Calculate the radical of heat tracing pipe in HTT-SUPERSEDE tracing system, and again through ANYSYS FEM Numerical Simulation pair Result of calculation carries out checking and approving correction.
Calculating according to heat tracing condition, when heat tracing temperature requirement 170 DEG C, required for outer heat tracing pipe, heat tracing external diameter is
d = 1.2 ( 170 + 10 ) ( 1 2 * 0.076 * ln 0.43 0.27 + 1 23.63 * 0.43 + 1 13.95 * 0.27 ) * 22.1 * ( 185 - 170 ) = 0.190 m
Heat tracing pipe radical is
The effect of the conventional heat tracing pipe that the outer heat tracing pipe according to a band heat-conducting daub is equivalent to 3 same diameter draws, Need the outer heat tracing pipe 4 of band heat-conducting daub.
Step 2: according to chemical anticorrosion requirement, eliminates rust to materail tube and heat tracing pipe respectively, brushing anticorrosive coat.
Step 3: as shown in Figure 2: when pipeline tracing is constructed need to by HTT-SD800/99LC heat-conducting daub along heat tracing pipe with Materail tube both sides are tamped and the most floating, are filled in U-shaped ditch by full for HTT-SD800/99LC heat-conducting daub the most again In groove, being buckled on outer heat tracing pipe, use stainless steel silk to tighten, every meter of U-shaped groove ties up 2-3 road.To elbow or flange length not To 1m can arbitrarily the U-shaped groove of cutting to appropriate length.Avoiding the occurrence of bubble and space, HTT-SD800/99LC heat-conducting daub should be by Heat tracing pipe is fully wrapped around, and construction thickness is 7-10mm.
As shown in Figure 3: apply HTT-SD800/99LC heat-conducting daub to be wrapped up by heat tracing pipe when equipment heat tracing is constructed, thickness For (7-10) mm.The interface width of HTT-SD800/99LC heat-conducting daub and equipment is about about 3 times of heat tracing pipe diameter.As When heat tracing pipe average headway is less than 50mm, it is contemplated that whole applying smears closely knit form of construction work.
Step 4: be coated with after wiping heat-conducting daub 24h, can install heat-insulation layer according to design code.

Claims (1)

1. the process replacing jacket hot tracing mode by outer heat tracing pipe heat tracing mode, it is characterised in that: the method is concrete Step is as follows:
Step one: according to various manufacturing technique requirents and local climate environmental condition, further according to petrochemical plant process pipe In mounting design handbook, heat tracing caliber and heat tracing pipe radical computing formula calculate heat tracing in HTT-SUPERSEDE tracing system The radical of pipe, and through ANYSYS FEM Numerical Simulation result of calculation carries out checking and approving correction again:
Heat tracing pipe external diameter required for outer heat tracing pipe
d = k ( t - t a ) ( 1 2 λ l n D 0 D i + 1 αD 0 + 1 α i D i ) α t ( t s t - t )
Heat tracing pipe radical
n ≥ d d 0
In formula:
D0---heat-insulation layer external diameter, m；
Di---heat-insulation layer internal diameter, m；
D---heat tracing pipe calculates external diameter, m；
d0---heat tracing pipe actual outside diameter, m；
K---heat loss additional coefficient；Typically take 1.15-1.25；
N---heat tracing pipe radical, root；
α---heat-insulation layer appearance is towards the exothermic coefficient of air；W/m2·K；
VwWind speed, m/s；
αi---in heat-insulation layer, heating space air is to the exothermic coefficient of heat-insulation layer, typically takes αi=13.95, W/m2·K；
αt---heat tracing pipe adds the exothermic coefficient of heat space, W/m in heat-insulation layer2·K；
T---medium temperature in supervisor, DEG C；
tst---medium temperature in heat tracing pipe, DEG C；
ta---ambient temperature, DEG C；
λ---heat insulation material product heat conductivity, W/m K；
Step 2: according to chemical anticorrosion requirement, carries out anticorrosion to materail tube and heat tracing pipe respectively；
Step 3: HTT-SD800/99LC heat-conducting daub need to be tamped along heat tracing pipe with materail tube both sides when pipeline tracing is constructed And the most floating, it is filled in full for HTT-SD800/99LC heat-conducting daub in U-shaped groove the most again, is buckled in outer heat tracing Guan Shang, uses stainless steel silk to tighten, and every meter of U-shaped groove ties up 2-3 road；U-shaped less than the random cutting of 1m to elbow or flange length Groove is to appropriate length；Avoiding the occurrence of bubble and space, HTT-SD800/99LC heat-conducting daub should be fully wrapped around by heat tracing pipe, executes Work thickness is 7-10mm；
Apply HTT-SD800/99LC heat-conducting daub to be wrapped up by heat tracing pipe when equipment heat tracing is constructed, thickness is 7-10mm；HTT- The interface width of SD800/99LC heat-conducting daub and equipment is about 3 times of heat tracing pipe diameter；As heat tracing pipe average headway is not enough During 50mm, it is considered to use whole applying to smear closely knit form of construction work；
Step 4: be coated with after wiping heat-conducting daub 24h, according to design code, installs heat-insulation layer.
CN201410031143.9A 2014-01-23 2014-01-23 A kind of process replacing jacket hot tracing mode by outer heat tracing pipe heat tracing mode Ceased CN103727349B (en)

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Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104455892A (en) * 2014-09-28 2015-03-25 南宁市磁汇科技有限公司 Heat transferring component for fluid heat transferring device
CN104455893A (en) * 2014-09-28 2015-03-25 南宁市磁汇科技有限公司 Fluid heat transferring device
CN112695215A (en) * 2020-12-18 2021-04-23 中核陕西铀浓缩有限公司 Selective heating process for equipment in insulation box of uranium concentration plant
CN113464176A (en) * 2021-07-26 2021-10-01 安邦电气股份有限公司 Anti-freezing electric tracing band for tunnel
CN114251534B (en) * 2021-12-30 2024-02-13 上海电气电站环保工程有限公司 Ammonia heat tracing transportation device with self-adjusting energy consumption

Citations (1)

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Publication number Priority date Publication date Assignee Title
CN200965134Y (en) * 2006-07-07 2007-10-24 沈阳铝镁设计研究院 Heating medium oil or steam temperature-guiding pipeline

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Publication number Priority date Publication date Assignee Title
JP2000110985A (en) * 1998-10-06 2000-04-18 Japan Insulation Co Ltd Heat transfer member for trace pipe and alternative execution work method therefor
JP2006046486A (en) * 2004-08-04 2006-02-16 Chugoku Electric Power Co Inc:The Freezing preventing structure for level detection pipe
WO2010065946A2 (en) * 2008-12-06 2010-06-10 3Ip, Pllc Improved heat transfer between tracer and pipe

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN200965134Y (en) * 2006-07-07 2007-10-24 沈阳铝镁设计研究院 Heating medium oil or steam temperature-guiding pipeline

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