CN105841530A - Marine heat pipe type waste heat economizer - Google Patents
Marine heat pipe type waste heat economizer Download PDFInfo
- Publication number
- CN105841530A CN105841530A CN201610253177.1A CN201610253177A CN105841530A CN 105841530 A CN105841530 A CN 105841530A CN 201610253177 A CN201610253177 A CN 201610253177A CN 105841530 A CN105841530 A CN 105841530A
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- China
- Prior art keywords
- heat pipe
- economizer
- heat
- waste heat
- marine
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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
- F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
- F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
-
- 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
- F28D21/0001—Recuperative heat exchangers
- F28D21/0003—Recuperative heat exchangers the heat being recuperated from exhaust gases
- F28D21/0005—Recuperative heat exchangers the heat being recuperated from exhaust gases for domestic or space-heating systems
- F28D21/0007—Water heaters
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention provides a marine heat pipe type waste heat economizer. The marine heat pipe type waste heat economizer comprises a heat pipe, a smoke bypass cavity and a smoke baffle valve, wherein a ribbed heat pipe bundle is arranged around the outer side of the heat pipe; the smoke bypass cavity is arranged at one end of the heat pipe, and a noise eliminating material structure is adopted in the smoke bypass cavity; and the smoke baffle valve is arranged at a smoke inlet and detects the outlet water temperature of the waste heat economizer. The marine heat pipe type waste heat economizer provided by the invention can achieve efficient exchange of waste heat of a ship within a relatively low general requirement, can sufficiently, efficiently and reliably use the waste heat of smoke of the ship for winter heating and other waste heat utilization means, and achieves the good effects of energy conservation and emission reduction.
Description
Technical field
The present invention relates to surface vessel energy-conserving and emission-cutting technology field, particularly to a kind of Marine Heat Pipe type waste heat economizer.
Background technology
Waste heat utilization equipment with diesel engine flue gas carries out heat exchange, should have: drag losses is little；Easy to clean dust stratification；Volume
Weight is little；Without additionally cooling down power consumption during non-heating operating mode；Preferably can also take into account silencing function.Traditional waste heat economizer by
Carrying out heat exchange in flue gas is by smoke pipe, therefore heat exchange surface is difficult to strengthen, and causes number of tubes more, and flue gas flow rate is higher,
Generally 20m/s, impact macroscopically is exactly that waste heat economizer volume, weight, drag losses are too big, 700kg/h waste heat boiler,
Heat converts into about 440kW, dry weight 5.5t, and weight in wet base reaches 8.5t, and discharge fume drag losses about 1000Pa.Either volume weight is still
Drag losses, all cannot meet naval vessel with requiring.In addition, it is necessary to configuration three-way valve carries out operating mode switching, it is ensured that heat supply in winter
Beyond operating mode, being unlikely to additionally to open cooling water pump in summer and increase energy consumption, the configuration of three-way valve and discharge bypass is further
Increase overall space demand.Meanwhile, it is limited that the inherent structure of tradition waste heat economizer determines its noise dampening efficiency, and former naval vessel disappears
Mixer cannot be cancelled, and causes equipment configuration lengthy and tedious, and drag losses increases further.Surface vessel lacks efficient and rational putting at present
Change the technological means of this part of waste heat resource.
Summary of the invention
It is an object of the invention to provide a kind of Marine Heat Pipe type waste heat economizer, to solve current surface vessel shortage height
The problem of effect reasonable replacement part of waste heat resource.
In order to solve above-mentioned technical problem, the technical scheme is that a kind of Marine Heat Pipe type waste heat economizer of offer,
Including: heat pipe, heat pipe wraps around layout ribbed heat pipe tube bank；Flue gas bypass cavity, is arranged on one end of described heat pipe, described cigarette
The internal structure using deadener of gas bypass cavity；Gas baffle valve, is arranged at gas approach, going out of detection waste heat economizer
Coolant-temperature gage.
Further, economizer hot water side is provided with relief valve.
Further, system pipeline arranges pressure relief valve.
Further, fume side fin pitch reaches 10.2mm.
Further, flue gas flow rate is changed to 20m/s-6m/s-20m/s.
Further, after flue gas, controlling waste heat economizer hot water outlet temperature is 85 DEG C-95 DEG C.
Further, heat pipe condenser section leaves the reserved section of total pipe range 5% length.
Further, there is under the air bleeding valve of described heat pipe top CuO and inhale hydrogen agent.
The Marine Heat Pipe type waste heat economizer that the present invention provides, it is possible to realize naval vessel waste heat in relatively low total demand high
Effect displacement, it is possible to fully, efficiently and reliably utilize naval vessel smoke discharging residual heat to carry out heat supply in winter and UTILIZATION OF VESIDUAL HEAT IN means thereof, play
Good effects of energy saving and emission reduction.
Accompanying drawing explanation
Below in conjunction with the accompanying drawings invention is described further:
The structural representation of the Marine Heat Pipe type waste heat economizer that Fig. 1 provides for the embodiment of the present invention；
The sleeve pipe hot water structural representation that Fig. 2 provides for the embodiment of the present invention.
Detailed description of the invention
The Marine Heat Pipe type waste heat economizer proposed the present invention below in conjunction with the drawings and specific embodiments is made the most in detail
Describe in detail bright.According to following explanation and claims, advantages and features of the invention will be apparent from.It should be noted that, accompanying drawing is equal
Use the form simplified very much and all use non-ratio accurately, only in order to aid in illustrating the embodiment of the present invention conveniently, lucidly
Purpose.
The core concept of the present invention is, the Marine Heat Pipe type waste heat economizer that the present invention provides, it is possible to relatively low total
Naval vessel waste heat displacement is realized, it is possible to fully, efficiently and reliably utilize naval vessel smoke discharging residual heat to carry out heat supply in winter in body demand
And UTILIZATION OF VESIDUAL HEAT IN means, play good effects of energy saving and emission reduction.
The structural representation of the Marine Heat Pipe type waste heat economizer that Fig. 1 provides for the embodiment of the present invention.With reference to Fig. 1, it is provided that
A kind of Marine Heat Pipe type waste heat economizer, including: heat pipe 11, heat pipe 11 wraps around layout ribbed heat pipe tube bank 12；By flue gas
Cavity 13, is arranged on one end of described heat pipe 11, the internal structure using deadener 15 of described flue gas bypass cavity 13；Flue gas keeps off
Plate valve 14, is arranged at gas approach, the leaving water temperature of detection waste heat economizer.
Specifically, based on hot pipe technique, after the Marine Heat Pipe type waste heat economizer of design uses hot pipe technique to do heat bridge,
The outer surface of contact fume side can carry out enhanced heat transfer by annular fin, thus saves spatial volume, reduces flue gas flow rate
To about 6m/s, thus reduce friction loss.When heat-pipe elements damages, it is only that this root heat-pipe elements lost efficacy and stopped
Heat transfer, does not interferes with water heater overall performance, and not affects power set.The gas baffle valve automatically controlled is set
14, detect waste heat economizer water supply water temperature, it is achieved flue gas flow automatically controls.After flue gas, control waste heat economizer heat
Water outlet temperature 85 DEG C-95 DEG C.During sub-load, gas baffle valve turns down automatically；When without heating, gas baffle valve is automatic
Closing, system is without hot well and this type of extra energy-consuming parts of cooling sea water pump.Flue gas bypass cavity 13 is integrated into heat pipe waste heat warp
Within Ji device, although economizer overall volume has increased, but compares the traditional waste heat economizer with bypass valve, overall empty
Between demand reduce.Flue gas bypass cavity 13 is internal simultaneously can do noise-reducing structure, reaches the erasure effect of 25dB.Flue gas heat exchange side flue gas
Change in flow is that the 20m/s-6m/s (face velocity) flue gas between-20m/s, and fin streams and jointly plays erasure effect, flue gas
Outlet space can be made noise-reducing structure equally and improve silencing function, without deafener after economizer.This device can be relatively low
Total demand in realize naval vessel waste heat displacement, it is possible to fully, efficiently and reliably utilize naval vessel smoke discharging residual heat to carry out winter
Heating and UTILIZATION OF VESIDUAL HEAT IN means thereof, play good effects of energy saving and emission reduction.Simultaneously as flue gas changes in managing outer large space
Heat, therefore device housings can conveniently arrange hand-hole, is prone to personnel's maintenance and deashing when shutting down.
Heat pipe waste heat economizer can adjust heat exchanger tube fume side tube wall temperature according to flue gas acid dew point temperature, be allowed to be higher than
This temperature, thus the acid dew piont corrosion and the ash that prevent metal wall from occurring condensing and produce block up.Keeping heat exchanger tube heat transfer efficiency
On the basis of, increase heat exchanger tube exhaust gas side heat exchange area, rationally to determine tube wall temperature, it is ensured that economizer can long-life ground work
Make.Heat pipe condenser section leaves the reserved section of total pipe range 5% length, in case the product of the incoagulable gas such as hydrogen after equipment longtime running
Raw, it is ensured that equipment Effec-tive Function steady in a long-term；There is under the air bleeding valve of heat pipe top CuO and inhale hydrogen agent, with hydrogen in absorption tube
For the incoagulable gas represented, extend heat pipe service life.There is heat pipe its continuous service life of quality assurance up to 12-15
Above.
The sleeve pipe hot water structural representation that Fig. 2 provides for the embodiment of the present invention.With reference to Fig. 2, hot water side uses sleeve structure,
Healed water flows through in the gap between sleeve pipe 21 and heat pipe 22, absorbs heat pipe 22 liberated heat, is heated by water.Owing to adopting
With sleeve structure, heated medium flows between pipe, makes equipment water side can bear higher pressure, the overall heat transfer space of hot water side
Demand is less, and equipment liquid load increase is less.
Adopting heat pipes for heat transfer computational methods are as follows:
Flue gas maximum heat-recoverable is:, wherein, for smoke inlet temperature, for flue gas exit temperature
Setting value,For flue gas mass flow,For flue gas specific heat at constant pressure.
Hot water amount, according to heat Balance Calculation,, whereinEnter for water
Mouth temperature,For water outlet temperature,For water specific heat at constant pressure.
Intraductal working medium temperature estimation, at smoke inlet:, take
Smoke outlet:, take n=3;
When Temperature of Working is in 30-200 DEG C of interval, use water as heat-pipe working medium the most suitable.Carbon steel pipe is generally used to make
For shell.Use gravity type heat pipe, be not added with capillary wick.
Caliber needs to determine that caliber minimum, the velocity of sound limit determine required pipe by the velocity of sound limit and entrainment limit
Footpath,, wherein,For single adopting heat pipes for heat transfer amount, r is the latent heat of vaporization,For the density of steam,Saturated vapor pressure for working medium；Entrainment limit determines required caliber:,
Wherein,For working medium Saturate liquid density,For working medium saturated vapor density. For coefficient of surface tension.
Tube wall minimum wall thickness (MINI W.) relatively core:Wherein, S is pipe thickness,For the allowable pressure of water steel heat pipe, pipe
Shell maximum stress,。
Generally heat pipe is when flue gas heat exchange occasion, and fume side uses ring-shaped finned tube enhanced heat exchange, and water side uses light pipe
, finned tube core parameter includes: light pipe external diameter:/ mm, light bore:/ mm, fin external diameter:/ mm, fin is high
Degree: H/mm, fin thickness:V/mm, fin clearance: Y/mm, wingization compares:。
Table 1 is overall heat-transfer coefficientValue reference.Select fume side inlet mass flow velocity, the flow velocity of water, water enters
The mass velocity of mouth。
Table 1
Being chosen as of bringing-up section and cooling section economic length ratio:, wherein,For gas in the outer convection current of finned tube,=,Outer convection current is managed for water,Be 2000 to 3000.
Safe length ratio, water as working medium,,It is less thanIt it is the safe work of heat pipe
The Basic Criteria made.
Determine fume side front face area；
Package arrangement condition, determines region length (heat pipes heat segment length), width windward,, after determining L1, according to
Length compares formulaDetermine L2, and reserved rational adiabatic section L0.
First row pipe radical:, S1 is for setting rational tube pitch；First comb heat transfer area:, select overall heat-transfer coefficient K0, calculate logarithmic mean temperature difference (LMTD)；Calculating total heat conduction area:
, pipe radical and row:, pipe row:, actual heat transfer area:, water side
Circulation area needed for single tube journey:。
Flue gas neutral temperature:, look into and take flue gas thermophysical parameter: density:；
Water side mean temperature:, look into the thermophysical parameter of water intaking: density:；
The outer exothermic coefficient of flue gas side pipe calculates:V,Ratio for the narrowest circulation area Yu front face area.
Determine the narrowest section mass velocity,。
With fin outer surface fume side calculating exothermic coefficient:；,For fin efficiency, the most desirable 0.85；
Determine the narrowest flow cross-section areas in water side and the narrowest flow area mass velocity, calculating water side convection transfer rate:；
Overall heat-transfer coefficient calculates:, wall resistance and dirt need to be considered
Thermal resistance；
Heat transfer area calculates:, smoke flow resistance calculates:；
The calculating of tube wall temperature should be as the criterion with the light tube wall temperature of the last comb of exhanst gas outlet side,。
Expanding chamber noise reduction calculates, in formula, TL is sound deadening capacity dB, and m is expansion
Ratio,For divergence ratio,For periodic function；
Sound-absorbing material noise reduction calculates such as formula:, in formula, C is sound-absorbing material girth, and S is that sound-absorbing material cuts
Area, L is sound absorption length.
The defening effect of device own calculates such as formula:, in formula, m is that density of material is multiplied by thickness, f
For frequency of sound wave.
In embodiments of the present invention, smoke inlet temperature is 323 DEG C, and flue gas flow is 5.5kg/s, and exhaust gas temperature is by 323
DEG C being down to 200 DEG C, flue gas standard condition flow is 19800 kg/h (5.5kg/s), according to thermodynamic metering, and maximum low temperature side heat transfer
Ability is 674kW.Heat pipe-type residue heat water heater operating point for design measures selection according to 7000kg/h hot water demand, and parameter is as follows: cigarette
Tolerance is 19800 kg/h (5.5kg/s), and it is 323 DEG C that flue gas enters heat exchange temperature, and it is 240 DEG C that flue gas goes out heat exchange temperature,
High temperature side heat output is 520 kW, and low temperature side heat output is 490 kW, and inflow temperature is 20 DEG C, and leaving water temperature is 80 DEG C, heating
The water yield is 7000kg/h.Table 2 is 500 kW waste heat economizer thermodynamic metering results.
Table 2
Table 3 is heat pipe heat exchanging result of calculation, and economizer hot water side is provided with relief valve, and system pipeline arranges pressure relief valve, to protect
The safety of card system.
Table 3
The tube bank of economizer heat pipe tilts 30 degree of angles with flue, to guarantee that hull waves argument intermittent fever at inclination maximum and maximum
The enough normal reflow of plumber's mass-energy, economizer housing main material selection 316L (022Cr17Ni12Mo2).Choose suitable flue gas
Flow velocity, both can guarantee that equipment from deashing ability, resistance will be made to increase because flow velocity is too high again, heavy wear tube wall.Heat pipe
The heavy wall of base tube takes into full account corrosion and allowance for abrasion, to extend the service life of tube wall.Suitably increase fume side fin pitch
Reach 10.2mm, under normal operating conditions, be possible to prevent dust stratification to put up a bridge.
Controlling thermotube wall temperature, equipment thermotube wall minimum temperature under the operating mode that design requires, more than 110 DEG C, is kept away
Exempt from that dew point corrosion occurs.For preventing water side pipe wall fouling, heat pipe hot water side header leaves soil cleaning port, can be according to actual motion feelings
Condition, removes dirt in header, it is ensured that equipment Effec-tive Function steady in a long-term in good time.
Smoke box shell arranges access hole, can be by shrouding diarrhea during maintenance, and opposite heat tube carries out checking and deashing.
In embodiments of the present invention, contour size of the unit(s) length × width × height is 1600 × 1370 × 2660, dry weight about 3.5
, weight in wet base about 4, drag losses ~ 350Pa.By contrast, tradition waste heat economizer, in the case of similar heat exchange amount, diameter
× a height of1530 × 4300, dry weight about 5.5, weight in wet base about 8.5, drag losses is 1000Pa.As can be seen here, have employed heat
After Manifold technology enhanced heat exchange, waste heat economizer advantage on volume, weight, resistance is obvious.Therefore, the embodiment of the present invention
The Marine Heat Pipe type waste heat economizer of the combination silencing function provided has a good application prospect in naval vessel field of waste heat utilization.
Obviously, those skilled in the art can carry out various change and the deformation essence without deviating from the present invention to the present invention
God and scope.So, if these amendments of the present invention and modification belong to the scope of the claims in the present invention and equivalent technologies thereof
Within, then the present invention is also intended to comprise these change and modification.
Claims (8)
1. a Marine Heat Pipe type waste heat economizer, it is characterised in that including:
Heat pipe, heat pipe wraps around layout ribbed heat pipe tube bank；
Flue gas bypass cavity, is arranged on one end of described heat pipe, the internal structure using deadener of described flue gas bypass cavity；
Gas baffle valve, is arranged at gas approach, the leaving water temperature of detection waste heat economizer.
2. Marine Heat Pipe type waste heat economizer as claimed in claim 1, it is characterised in that economizer hot water side is provided with safety
Valve.
3. Marine Heat Pipe type waste heat economizer as claimed in claim 1, it is characterised in that system pipeline arranges pressure release
Valve.
4. Marine Heat Pipe type waste heat economizer as claimed in claim 1, it is characterised in that fume side fin pitch reaches
10.2mm。
5. Marine Heat Pipe type waste heat economizer as claimed in claim 1, it is characterised in that flue gas flow rate is changed to 20m/s-
6m/s-20m/s。
6. Marine Heat Pipe type waste heat economizer as claimed in claim 1, it is characterised in that after flue gas, control waste heat
Economizer hot water outlet temperature is 85 DEG C-95 DEG C.
7. Marine Heat Pipe type waste heat economizer as claimed in claim 1, it is characterised in that heat pipe condenser section leaves total pipe range 5%
The reserved section of length.
8. Marine Heat Pipe type waste heat economizer as claimed in claim 1, it is characterised in that have under the air bleeding valve of described heat pipe top
CuO is had to inhale hydrogen agent.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610253177.1A CN105841530A (en) | 2016-04-22 | 2016-04-22 | Marine heat pipe type waste heat economizer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610253177.1A CN105841530A (en) | 2016-04-22 | 2016-04-22 | Marine heat pipe type waste heat economizer |
Publications (1)
| Publication Number | Publication Date |
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| CN105841530A true CN105841530A (en) | 2016-08-10 |
Family
ID=56588736
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610253177.1A Pending CN105841530A (en) | 2016-04-22 | 2016-04-22 | Marine heat pipe type waste heat economizer |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60152893A (en) * | 1984-01-19 | 1985-08-12 | Seishi Gijutsu Kenkyu Kumiai | Waste heat recovery device |
| CN201387127Y (en) * | 2009-03-12 | 2010-01-20 | 武汉领辉科技有限责任公司 | Modularized afterheat recycler of heat pipe flue gas |
| CN201514140U (en) * | 2009-10-12 | 2010-06-23 | 南通市申通机械厂 | Heat pipe silencer |
| CN202392826U (en) * | 2011-11-15 | 2012-08-22 | 上海晟煜科贸有限公司 | Flue gas waste heat recovery heat pipe heat exchanger of steam injecting boiler in oil field |
| CN103322841A (en) * | 2013-06-28 | 2013-09-25 | 浙江月宫冷链设备有限公司 | Cooling chamber for ethylene removal equipment |
| CN203478165U (en) * | 2013-07-03 | 2014-03-12 | 中冶焦耐工程技术有限公司 | Radial heat pipe-common heat exchange pipe combined waste heat recovery device for flue exhaust gas |
| CN205155904U (en) * | 2015-09-15 | 2016-04-13 | 山东万聚节能设备有限公司 | Novel heat recovery steam generator |
-
2016
- 2016-04-22 CN CN201610253177.1A patent/CN105841530A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60152893A (en) * | 1984-01-19 | 1985-08-12 | Seishi Gijutsu Kenkyu Kumiai | Waste heat recovery device |
| CN201387127Y (en) * | 2009-03-12 | 2010-01-20 | 武汉领辉科技有限责任公司 | Modularized afterheat recycler of heat pipe flue gas |
| CN201514140U (en) * | 2009-10-12 | 2010-06-23 | 南通市申通机械厂 | Heat pipe silencer |
| CN202392826U (en) * | 2011-11-15 | 2012-08-22 | 上海晟煜科贸有限公司 | Flue gas waste heat recovery heat pipe heat exchanger of steam injecting boiler in oil field |
| CN103322841A (en) * | 2013-06-28 | 2013-09-25 | 浙江月宫冷链设备有限公司 | Cooling chamber for ethylene removal equipment |
| CN203478165U (en) * | 2013-07-03 | 2014-03-12 | 中冶焦耐工程技术有限公司 | Radial heat pipe-common heat exchange pipe combined waste heat recovery device for flue exhaust gas |
| CN205155904U (en) * | 2015-09-15 | 2016-04-13 | 山东万聚节能设备有限公司 | Novel heat recovery steam generator |
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Application publication date: 20160810 |