CN103256705A - Condensing radial heat-pipe boiler - Google Patents
Condensing radial heat-pipe boiler Download PDFInfo
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- CN103256705A CN103256705A CN2012100347041A CN201210034704A CN103256705A CN 103256705 A CN103256705 A CN 103256705A CN 2012100347041 A CN2012100347041 A CN 2012100347041A CN 201210034704 A CN201210034704 A CN 201210034704A CN 103256705 A CN103256705 A CN 103256705A
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Abstract
The invention discloses a condensing radial heat-pipe boiler. The condensing radial heat-pipe boiler comprises a radial heat-pipe boiler body (1), an electric control cabinet (9) and a vacuum pump (10) which are connected through cables and wires. The radial heat-pipe boiler body (1) comprises a burner (2), a boiler front cover (3), a combined radial heat pipe (4), a heat-insulating cylinder (5), an air preheating radial heat pipe (6), a boiler outer cylinder (7) and a boiler rear cover (8) which are connected through flanges and bolts. The boiler is characterized in that radial heat pipes are high in heat transfer rate, high in heat flux, high in heat exchange efficiency and small in size; the air preheating radial heat pipe is specially arranged to fully absorb flue gas sensible heat and condensing waste heat and greatly improve the efficiency of the boiler; and the radial heat-pipe boiler is similar to a vacuum boiler, confined water does not directly contact with the high-temperature flue gas, the radial heat-pipe boiler is a normal-pressure boiler, and the safety is high.
Description
Technical field
Technical solutions according to the invention belong to the water heater field, concretely, are to belong to the water heater field that has around the water mantle of or several combustion chambers, according to International Patent Classification, belong to F24H1/24.
Background technology
Existing heat pipe boiler is ZL200820005556.X as China's patent No., title: " the horizontal atmospheric superconductive heat pipe of fuel oil (gas) heating water and saving energy environment-protection boiler ", establish combustion bin and heat exchange storehouse in the drum.The combustion bin entrance is connected with body of heater one side, is used for external burner; Combustion bin is terminal to be connect with heat exchange storehouse front end kiss, and the heat exchange storehouse is terminal to be connected with the body of heater opposite side, is used for external chimney.Utilize spiral whirlpool spray technique that the energy of fuel is fully discharged, utilize the super heat-conductive pipe technology to release energy simultaneously and absorb to greatest extent.Its weak point:
1, adopt axial heat pipe, relative radial heat pipe, the working medium evaporating surface is little, and evaporating surface is to the cryosurface path length, and heat transfer density is little, and heat transfer efficiency is low.
2, adopt many axial heat pipes and flue to weld, cannot say for sure whole weld seam high-quality.
3, can produce a spot of on-condensible gas in the heat pipe course of work, accumulate in the axial heat pipe upper end, owing to be the roundlet long tube, very sensitive to the on-condensible gas gathering, cryosurface is dwindled, the decay of heat exchange amount is very fast.
4, a large amount of little axial heat pipes are embedded in the stove water, check difficult in maintenance.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, adopt the flue gas that flue gas that the modular radial heat pipe forms and hot water heat-exchange system, radial heat pipe form and advanced stove air heat-exchange system, given full play to the radial heat pipe heat exchange rapidly, the characteristics of efficient, compact conformation, significantly improve boiler efficiency, saved floor space.
The object of the present invention is achieved like this: this condensing radial heat pipe boiler, comprise radial heat pipe boiler body, electrical control cubicles, vavuum pump, and be connected with lead by cable between them.The radial heat pipe boiler body comprises combustor, boiler protecgulum, modular radial heat pipe, heat insulation tube, air preheat radial heat pipe, boiler urceolus, boiler bonnet.Electrical control cubicles links by cable and lead and each control point sensor of combustor, vavuum pump and radial heat pipe boiler body.Combustor is by flange and being bolted on the boiler protecgulum, boiler protecgulum and boiler bonnet all are separately fixed on the front and rear covers connection plate of modular radial heat pipe by bolt, locate and support by helical fin between modular radial heat pipe and heat insulation tube, air preheat radial heat pipe, the boiler urceolus, one end of metal hose links by flange and bolt and air outlet slit, and the other end links by flange and bolt and combustor.
The boiler protecgulum comprises preceding cover outer wall, thermal insulation layer, protecgulum inwall, protecgulum neighboring; Thermal insulation layer is loaded in boiler protecgulum the inside, and boiler protecgulum outside is connected by preceding cover outer wall, protecgulum inwall, the welding of protecgulum neighboring.
The modular radial heat pipe comprises that inner core cover plate behind annular cover plate behind inner core cover plate before annular cover plate before the outer heat pipe urceolus, outer heat pipe inner core, interior heat pipe urceolus, interior heat pipe inner core, heat pipe front shroud, heat pipe, the heat pipe, heat pipe back shroud, the heat pipe, the heat pipe, modular radial heat pipe vacuumize and connects mouth, vacuum valve, water outlet pipe nipple, water inlet pipe nipple, flue outlet, modular radial heat pipe helical fin, front and rear covers and connect plate, hot water deflection plate, A working medium; Outer heat pipe urceolus, outer heat pipe inner core and interior heat pipe urceolus, interior heat pipe inner core annular space and two end spaces Lower Halves fill A working medium, wherein the modular radial heat pipe vacuumizes to connect and is thread connection between mouth and the vacuum valve, condensed water connects and is thread connection between mouth and the condensed water valve, connects for welding between all the other members.
Heat insulation tube comprises urceolus, thermal insulation layer, inner core, heat insulation tube helical fin, preceding annular cover plate, the belt cover plate in back, exhanst gas outlet, and thermal insulation layer is loaded in heat insulation tube the inside, connects for welding between all the other members.
The air preheat radial heat pipe comprises that heat pipe urceolus, heat pipe inner core, air preheat heat pipe vacuumize and connects mouth, vacuum valve, air preheat radial heat pipe outer spiral fin, condensed water and connect mouth, condensed water valve, exhanst gas outlet, air preheat radial heat pipe inner spiral fin, front shroud, back shroud, B working medium; Lower Half fills B working medium between heat pipe urceolus and the heat pipe inner core, and wherein the air preheat heat pipe vacuumizes to connect and is thread connection between mouth and the vacuum valve, and condensed water connects and is thread connection between mouth and the condensed water valve, connects for welding between all the other members.
The boiler urceolus comprises boiler outer tube wall, air intlet, air outlet slit, metal hose, and metal hose connects with air outlet slit by flange, bolt, connects for welding between all the other members.
The boiler bonnet comprises back cover outer wall, thermal insulation layer, bonnet inwall, bonnet neighboring, filling thermal insulation layer in the boiler bonnet, and the outside is connected by back cover outer wall, bonnet inwall, the welding of bonnet neighboring.
This condensing radial heat pipe boiler has following characteristics:
1, the radial heat pipe heat transfer rate is fast, and heat flow density is big, the heat exchange efficiency height, and volume is little.
2, ad hoc air preheat radial heat pipe fully absorbs obvious heat of smoke and condensation waste heat, significantly improves boiler efficiency.
3, the radial heat pipe boiler is similar to vacuum boiler, and artesian water does not directly contact with high-temperature flue gas, is normal-pressure boiler, and security is preferably arranged.
Description of drawings
Fig. 1 condensing radial heat pipe boiler structure schematic diagram.
Fig. 2 A-A cutaway view.
Fig. 3 B-B cutaway view.
Component part numbers: radial heat pipe boiler body 1, combustor 2, boiler protecgulum 3, modular radial heat pipe 4, heat insulation tube 5, air preheat radial heat pipe 6, boiler urceolus 7, boiler bonnet 8, electrical control cubicles 9, vavuum pump 10, preceding cover outer wall 3-1, thermal insulation layer 3-2, protecgulum inwall 3-3, protecgulum neighboring 3-4, outer heat pipe urceolus 4-1, outer heat pipe inner core 4-2, interior heat pipe urceolus 4-3, interior heat pipe inner core 4-4, heat pipe front shroud 4-5, annular cover plate 4-6 before the heat pipe, inner core cover plate 4-7 before the heat pipe, heat pipe back shroud 4-8, annular cover plate 4-9 behind the heat pipe, inner core cover plate 4-10 behind the heat pipe, the modular radial heat pipe vacuumizes and meets mouth 4-11, vacuum valve 4-12, water outlet pipe nipple 4-13, water inlet pipe nipple 4-14, flue outlet 4-15, modular radial heat pipe helical fin 4-16, front and rear covers connects plate 4-17, hot water deflection plate 4-18, A working medium 4-19, urceolus 5-1, thermal insulation layer 5-2, inner core 5-3, heat insulation tube helical fin 5-4, preceding annular cover plate 5-5, back annular cover plate 5-6, exhanst gas outlet 5-7, heat pipe urceolus 6-1, heat pipe inner core 6-2, the air preheat heat pipe vacuumizes and meets mouth 6-3, vacuum valve 6-4, air preheat heat pipe outer spiral fin 6-5, condensed water meets mouth 6-6, condensed water valve 6-7, exhanst gas outlet 6-8, air preheat heat pipe inner spiral fin 6-9, front shroud 6-10, back shroud 6-11, B working medium 6-12, boiler outer tube wall 7-1, air intlet 7-2, air outlet slit 7-3, metal hose 7-4, back cover outer wall 8-1, thermal insulation layer 8-2, bonnet inwall 8-3, bonnet neighboring 8-4.
The specific embodiment
Below in conjunction with drawings and Examples, the present invention is further described.
As can be seen, this condensing radial heat pipe boiler comprises radial heat pipe boiler body 1, electrical control cubicles 9, vavuum pump 10, is connected with lead by cable between them from Fig. 1, Fig. 2, Fig. 3.Radial heat pipe boiler body 1 comprises combustor 2, boiler protecgulum 3, modular radial heat pipe 4, heat insulation tube 5, air preheat radial heat pipe 6, boiler urceolus 7, boiler bonnet 8.Electrical control cubicles 9 links by cable and lead and combustor 2, vavuum pump 10 and radial heat pipe boiler body 1 each control point sensor.Combustor 2 is by flange and being bolted on the boiler protecgulum 3, boiler protecgulum 3 and boiler bonnet 8 all are separately fixed on the front and rear covers connection plate 4-17 of modular radial heat pipe 4 by bolt, locate and support by helical fin between modular radial heat pipe 4 and heat insulation tube 5, air preheat radial heat pipe 6, the boiler urceolus 7, the end of metal hose 7-4 links by flange and bolt and air outlet slit 7-3, and the other end links by flange and bolt and combustor 2.
Boiler protecgulum 3 comprises preceding cover outer wall 3-1, thermal insulation layer 3-2, protecgulum inwall 3-3, protecgulum neighboring 3-4; Thermal insulation layer 3-2 is loaded in boiler protecgulum 3 the insides, and connection is welded by preceding cover outer wall 3-1, protecgulum inwall 3-3, protecgulum neighboring 3-4 in boiler protecgulum 3 outsides.
Modular radial heat pipe 4 comprises outer heat pipe urceolus 4-1, outer heat pipe inner core 4-2, interior heat pipe urceolus 4-3, interior heat pipe inner core 4-4, heat pipe front shroud 4-5, annular cover plate 4-6 before the heat pipe, inner core cover plate 4-7 before the heat pipe, heat pipe back shroud 4-8, annular cover plate 4-9 behind the heat pipe, inner core cover plate 4-10 behind the heat pipe, the modular radial heat pipe vacuumizes and meets mouth 4-11, vacuum valve 4-12, water outlet pipe nipple 4-13, water inlet pipe nipple 4-14, flue outlet 4-15, modular radial heat pipe helical fin 4-16, front and rear covers connects plate 4-17, hot water deflection plate 4-18, A working medium 4-19; Outer heat pipe urceolus 4-1, outer heat pipe inner core 4-2 and interior heat pipe urceolus 4-3, interior heat pipe inner core 4-4 annular space and two end spaces Lower Halves fill A working medium 4-19, wherein the modular radial heat pipe vacuumizes to connect and is thread connection between mouth 4-11 and the vacuum valve 4-12, connects for welding between all the other members.
Heat insulation tube 5 comprises urceolus 5-1, thermal insulation layer 5-2, inner core 5-3, heat insulation tube helical fin 5-4, preceding annular cover plate 5-5, back belt cover plate 5-6, exhanst gas outlet 5-7, and thermal insulation layer 5-2 is loaded in heat insulation tube 5 the insides, is the welding connection between all the other members.
Air preheat radial heat pipe 6 comprise heat pipe urceolus 6-1, heat pipe inner core 6-2, air preheat heat pipe vacuumize meet mouth 6-3, vacuum valve 6-4, air preheat radial heat pipe outer spiral fin 6-5, condensed water meets mouth 6-6, condensed water valve 6-7, exhanst gas outlet 6-8, air preheat radial heat pipe inner spiral fin 6-9, front shroud 6-10, back shroud 6-11, B working medium 6-12; Lower Half fills B working medium 6-12 between heat pipe urceolus 6-1 and the heat pipe inner core 6-2, wherein the air preheat heat pipe vacuumizes to connect and is thread connection between mouth 6-3 and the vacuum valve 6-4, condensed water connects and is thread connection between mouth 6-6 and the condensed water valve 6-7, connects for welding between all the other members.
Electrical control cubicles 9 is power supply and control centres of whole condensing radial heat pipe boiler.Vavuum pump 10 vacuumizes by flexible pipe and modular radial heat pipe when heat pipe need vacuumize and connects mouth 4-11 and air preheat heat pipe and vacuumize and meet mouth 6-3 and link.In the water outlet, return water temperature, pressure, exhanst gas outlet temperature, preheated air temperature, stove in vacuum, two heat pipes when vapor (steam) temperature, pressure, blowing out important operational factor such as working medium liquid level, the detecting sensor of security parameter all realize monitoring, demonstration, early warning by electrical control cubicles 9, realize according to the automatic control of user's request heating according to need and operation automatically.
This condensing radial heat pipe boiler course of work is as follows: inject quantitative corresponding working medium respectively in two kinds of heat pipes, vacuumize and meet the requirements of vacuum, the hot water circuit pump startup, need the water of heating to enter in the annular chamber of being formed by outer heat pipe inner core 4-2 and interior heat pipe urceolus 4-3 through water inlet pipe nipple 4-14, and from deflection plate 4-18 cavity of resorption baffling to epicoele, 4-13 enters the hot water external system through the water outlet pipe nipple.Combustor 2 ignition, flue gas from the heat pipe inner core 4-4 of modular radial heat pipe 4 through flue outlet 4-15, along modular radial heat pipe helical fin 4-16, outside in the annular space of heat pipe urceolus 4-1 and inner core 5-3 rotating flow to exhanst gas outlet 5-7.This moment modular radial heat pipe 4 inside and outside about entirely by the high-temperature flue gas heat intensive, working medium in the modular radial heat pipe 4 are a large amount of evaporations rapidly, and left and right sides wall condensation inside and outside the water jacket, emit condensation heat, rapid heat hot water, flue gas is lowered the temperature rapidly by working medium evaporation heat absorption because of large tracts of land simultaneously.Flue gas continues to discharge to exhanst gas outlet 6-8 along the circular passage rotating flow of heat insulation tube helical fin 5-4 between urceolus 5-1 and heat pipe inner core 6-2 from exhanst gas outlet 5-7.In this process, flue gas heating heat pipe inner core 6-2, internal working medium heat absorption evaporation is down to below the dew point flue-gas temperature, emits a large amount of condensation heat, and condensed water is descending along wall, connects mouth from condensed water and discharges.Working substance steam is in heat pipe urceolus 6-1 condensation heat release.Meanwhile, because taking out of combustor 2 drawn, air sucks from air inlet 7-2, before turning to along the annular chamber inward turning of air preheat radial heat pipe outer spiral fin 6-5 between boiler outer tube wall 7-1 and heat pipe urceolus 6-1, by heat pipe urceolus 6-1 heating, enter combustor 2 from air outlet slit 7-3 through metal hose 7-4 and participate in burning.
Claims (7)
1. condensing radial heat pipe boiler, it is characterized in that: it comprises radial heat pipe boiler body (1), electrical control cubicles (9), vavuum pump (10), is connected with lead by cable between them; Radial heat pipe boiler body (1) comprises combustor (2), boiler protecgulum (3), modular radial heat pipe (4), heat insulation tube (5), air preheat radial heat pipe (6), boiler urceolus (7), boiler bonnet (8); Electrical control cubicles (9) links by cable and lead and combustor (2), vavuum pump (10) and each control point sensor of radial heat pipe boiler body (1); Combustor (2) is by flange and being bolted on the boiler protecgulum (3), boiler protecgulum (3) and boiler bonnet (8) all are separately fixed on the front and rear covers connection plate (4-17) of modular radial heat pipe (4) by bolt, locate and support by helical fin between modular radial heat pipe (4) and heat insulation tube (5), air preheat radial heat pipe (6), the boiler urceolus (7), one end of metal hose (7-4) links by flange and bolt and air outlet slit (7-3), and the other end links by flange and bolt and combustor (2).
2. according to the described condensing radial heat pipe of claim 1 boiler, it is characterized in that: described boiler protecgulum (3) comprises preceding cover outer wall (3-1), thermal insulation layer (3-2), protecgulum inwall (3-3), protecgulum neighboring (3-4); Thermal insulation layer (3-2) is loaded in boiler protecgulum (3) the inside, and connection is welded by preceding cover outer wall (3-1), protecgulum inwall (3-3), protecgulum neighboring (3-4) in boiler protecgulum (3) outside.
3. according to the described condensing radial heat pipe of claim 1 boiler, it is characterized in that: described modular radial heat pipe (4) comprises outer heat pipe urceolus (4-1), outer heat pipe inner core (4-2), interior heat pipe urceolus (4-3), interior heat pipe inner core (4-4), heat pipe front shroud (4-5), annular cover plate (4-6) before the heat pipe, inner core cover plate (4-7) before the heat pipe, heat pipe back shroud (4-8), annular cover plate behind the heat pipe (4-9), inner core cover plate (4-10) behind the heat pipe, the modular radial heat pipe vacuumizes and connects mouth (4-11), vacuum valve (4-12), water outlet pipe nipple (4-13), water inlet pipe nipple (4-14), flue outlet (4-15), modular radial heat pipe helical fin (4-16), front and rear covers connects plate (4-17), hot water deflection plate (4-18), A working medium (4-19); Outer heat pipe urceolus (4-1), outer heat pipe inner core (4-2) and interior heat pipe urceolus (4-3), interior heat pipe inner core (4-4) annular space and two end spaces Lower Halves fill A working medium (4-19), wherein the modular radial heat pipe vacuumizes to connect and is thread connection between mouth (4-11) and the vacuum valve (4-12), connects for welding between all the other members.
4. according to the described condensing radial heat pipe of claim 1 boiler, it is characterized in that: described heat insulation tube (5) comprises urceolus (5-1), thermal insulation layer (5-2), inner core (5-3), heat insulation tube helical fin (5-4), preceding annular cover plate (5-5), the belt cover plate (5-6) in back, exhanst gas outlet (5-7), thermal insulation layer (5-2) is loaded in heat insulation tube (5) the inside, connects for welding between all the other members.
5. according to the described condensing radial heat pipe of claim 1 boiler, it is characterized in that: described air preheat radial heat pipe (6) comprises that heat pipe urceolus (6-1), heat pipe inner core (6-2), air preheat heat pipe vacuumize and connects mouth (6-3), vacuum valve (6-4), air preheat radial heat pipe outer spiral fin (6-5), condensed water and connect mouth (6-6), condensed water valve (6-7), exhanst gas outlet (6-8), air preheat radial heat pipe inner spiral fin (6-9), front shroud (6-10), back shroud (6-11), B working medium (6-12); Lower Half fills B working medium (6-12) between heat pipe urceolus (6-1) and the heat pipe inner core (6-2), wherein the air preheat heat pipe vacuumizes to connect and is thread connection between mouth (6-3) and the vacuum valve (6-4), condensed water connects and is thread connection between mouth (6-6) and the condensed water valve (6-7), connects for welding between all the other members.
6. according to the described condensing radial heat pipe of claim 1 boiler, it is characterized in that: described boiler urceolus (7) comprises boiler outer tube wall (7-1), air intlet (7-2), air outlet slit (7-3), metal hose (7-4), metal hose (7-4) connects with air outlet slit (7-3) by flange, bolt, connects for welding between all the other members.
7. according to the described condensing radial heat pipe of claim 1 boiler, it is characterized in that: described boiler bonnet (8) comprises back cover outer wall (8-1), thermal insulation layer (8-2), bonnet inwall (8-3), bonnet neighboring (8-4), filling thermal insulation layer (8-2) in the boiler bonnet (8), connection is welded by back cover outer wall (8-1), bonnet inwall (8-3), bonnet neighboring (8-4) in the outside.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210034704.1A CN103256705B (en) | 2012-02-16 | 2012-02-16 | Condensing radial heat-pipe boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210034704.1A CN103256705B (en) | 2012-02-16 | 2012-02-16 | Condensing radial heat-pipe boiler |
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| Publication Number | Publication Date |
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| CN103256705A true CN103256705A (en) | 2013-08-21 |
| CN103256705B CN103256705B (en) | 2015-04-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210034704.1A Expired - Fee Related CN103256705B (en) | 2012-02-16 | 2012-02-16 | Condensing radial heat-pipe boiler |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108036374A (en) * | 2017-12-28 | 2018-05-15 | 陕西科弘实业发展有限公司 | Cooker with heat pipe |
| CN109185852A (en) * | 2018-09-10 | 2019-01-11 | 佛山市三水至丰纸品制造有限公司 | A kind of environment-friendlyboiler boiler system |
| CN109477663A (en) * | 2015-07-13 | 2019-03-15 | 富尔顿集团有限公司 | High efficiency fluid heating system discharge manifold |
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| EP0109356A2 (en) * | 1982-11-12 | 1984-05-23 | Arc Technologies Systems, Ltd. | Electrode for high temperature processes and its use |
| CN201057461Y (en) * | 2007-02-14 | 2008-05-07 | 田树林 | Waste heat recovery device of superconducting heat pipe |
| CN201078704Y (en) * | 2007-09-11 | 2008-06-25 | 何俊南 | Condensing recover type vacuum hot water boiler |
| CN201173588Y (en) * | 2008-03-03 | 2008-12-31 | 大庆摩恩达工程有限公司 | Extreme thermal efficiency boiler |
| US20090188906A1 (en) * | 2008-01-29 | 2009-07-30 | Stiftung Alfred-Wegener-Institut Fuer Polar-Und Meeresforschung | High-temperature tube furnace for pyrolysis |
| CN202630370U (en) * | 2012-02-16 | 2012-12-26 | 朱杰 | Condensing-type radial heat pipe boiler |
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2012
- 2012-02-16 CN CN201210034704.1A patent/CN103256705B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0109356A2 (en) * | 1982-11-12 | 1984-05-23 | Arc Technologies Systems, Ltd. | Electrode for high temperature processes and its use |
| CN201057461Y (en) * | 2007-02-14 | 2008-05-07 | 田树林 | Waste heat recovery device of superconducting heat pipe |
| CN201078704Y (en) * | 2007-09-11 | 2008-06-25 | 何俊南 | Condensing recover type vacuum hot water boiler |
| US20090188906A1 (en) * | 2008-01-29 | 2009-07-30 | Stiftung Alfred-Wegener-Institut Fuer Polar-Und Meeresforschung | High-temperature tube furnace for pyrolysis |
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| CN202630370U (en) * | 2012-02-16 | 2012-12-26 | 朱杰 | Condensing-type radial heat pipe boiler |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109477663A (en) * | 2015-07-13 | 2019-03-15 | 富尔顿集团有限公司 | High efficiency fluid heating system discharge manifold |
| CN108036374A (en) * | 2017-12-28 | 2018-05-15 | 陕西科弘实业发展有限公司 | Cooker with heat pipe |
| CN108036374B (en) * | 2017-12-28 | 2024-03-15 | 陕西科弘实业发展有限公司 | Heat pipe pot |
| CN109185852A (en) * | 2018-09-10 | 2019-01-11 | 佛山市三水至丰纸品制造有限公司 | A kind of environment-friendlyboiler boiler system |
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| CN103256705B (en) | 2015-04-08 |
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Granted publication date: 20150408 Termination date: 20220216 |