CN106066092A - Gas-fired condensing boiler - Google Patents
Gas-fired condensing boiler Download PDFInfo
- Publication number
- CN106066092A CN106066092A CN201610575101.0A CN201610575101A CN106066092A CN 106066092 A CN106066092 A CN 106066092A CN 201610575101 A CN201610575101 A CN 201610575101A CN 106066092 A CN106066092 A CN 106066092A
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- CN
- China
- Prior art keywords
- gas
- condensing boiler
- heat
- fired condensing
- exchanger rig
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H8/00—Fluid heaters characterised by means for extracting latent heat from flue gases by means of condensation
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1809—Arrangement or mounting of grates or heating means for water heaters
- F24H9/1832—Arrangement or mounting of combustion heating means, e.g. grates or burners
- F24H9/1836—Arrangement or mounting of combustion heating means, e.g. grates or burners using fluid fuel
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
Embodiments providing a kind of gas-fired condensing boiler, the flue gas that this gas-fired condensing boiler produces directly contacts with the backwater of heating system and carries out heat exchange.The gas-fired condensing boiler that the embodiment of the present invention provides is energy-efficient, safe and reliable.
Description
Technical field
The present invention relates to boiler technology field, particularly relate to a kind of gas-fired condensing boiler.
Background technology
Gas-fired condensing boiler, be by the water vapour in condensation flue gas so that the latent heat of vaporization therein is recycled,
Thus improve the boiler of the thermal efficiency.Condensing boiler it is critical only that condensation technology, be the technology of a kind of novel energy-conserving, environmental protection；It
Principle uncomplicated, be through flue gas condensing, the heat energy in recovered flue gas simple summary, thus reach to improve boiler
The purpose of efficiency.
In conventional gas boiler, exhaust gas temperature is typically at 120～180 DEG C, the highest so that fuel (such as natural gas:
CH4+2O2 → CO2+2H2O) burning time produce water, flue gas is in the water vapour of superheat state, with flue gas from chimney
Middle loss.The conventional boiler thermal efficiency typically can only achieve 85%～91%.And gas-fired condensing boiler, it is reduced to exhaust gas temperature
Below 58 DEG C of condensation temperatures, fully having reclaimed the latent heat of vaporization of the sensible heat in flue gas and water vapour, the thermal efficiency reaches as high as 106%
(calculating by Lower heat value).
Conventional gas boiler energy-saving weak effect, floor space is big, and programming rate is slow: tradition condensing boiler uses tubular type to change
Hot device, heat transfer coefficient is little, and heat transfer effect is poor, and when boiler controller system starts, programming rate is slow, and the time of needs is long.And for obtaining
Condensation effect, only increases heat exchange area, and floor space is the biggest.
Conventional gas boiler is short for service life, there is potential safety hazard: tradition condensing boiler uses pipe heat exchanger, condensed water
Condensing on tube wall, it may occur that cold end corrosion, trommel causes revealing, and not only boiler is short for service life, and affects boiler
Safe and stable operation.
Summary of the invention
The present invention provides a kind of gas-fired condensing boiler, it is possible in solution prior art, boiler is the most energy-conservation, the life-span is short
Problem.
For solving above-mentioned technical problem, the technical scheme that the present invention uses is: provide a kind of gas-fired condensing boiler, combustion
The flue gas that gas condensing boiler produces directly contacts with the backwater of heating system and carries out heat exchange.
Wherein, gas-fired condensing boiler includes cylinder, is provided with heat-exchanger rig in cylinder, and the inwall of heat-exchanger rig is provided with trickle
Dish, water spraying tray has multiple hole, and backwater passes through multiple hole and carries out heat exchange with flue gas.
Wherein, water spraying tray is multiple, and in the vertical direction interval is arranged.
Wherein, one of them one end of adjacent water spraying tray is connected with the left wall of heat-exchanger rig, the other end and heat-exchanger rig
Right wall is not connected to；Another one end of adjacent water spraying tray is not connected to the left wall of heat-exchanger rig, the other end and the right side of heat-exchanger rig
Wall connects.
Wherein, heat-exchanger rig top is provided with return water tank, and one end of casing is provided with inlet of cold air, and it is empty that the other end is provided with heat
Gas exports, and the upper end of cylinder is provided with backwater import, is provided with heat exchanger in return water tank, and the backwater from heating system enters from backwater
Mouth enters and carries out heat exchange with the cold air entered from inlet of cold air by heat exchanger, becomes heat empty after cold air heat exchange
Gas flows out from hot air outlet.
Wherein, heat exchanger includes the base tube that a cross section is rounded, and the outer surface of base tube forms the fin that multi-turn is placed equidistant,
The inner surface of base tube is formed with screw thread or the fin that multi-turn is placed equidistant.
Wherein, gas-fired condensing boiler also includes burner, and hot-air enters burner by hot-flow flue and participates in burning.
Wherein, gas-fired condensing boiler also includes that corrugated internal furnace combustor, corrugated internal furnace combustor are located at inner barrel, air
Entering combustor by burner and participate in burning, the flue gas produced after burning carries out heat exchange with the water being coated on outside combustor.
Wherein, gas-fired condensing boiler also includes reversal chamber, and the flue gas produced after burning passed through reversal chamber after entering heat exchange
Enter heat-exchanger rig.
Wherein, gas-fired condensing boiler also includes chimney, and chimney is connected with heat-exchanger rig, and flue gas carries out heat friendship at heat-exchanger rig
Change rear temperature reduce and discharged by chimney.
The gas-fired condensing boiler that the embodiment of the present invention provides is by the flue gas produced by gas-fired condensing boiler and heating system
Backwater directly contact and carry out heat exchange, the gas-fired condensing boiler that the embodiment of the present invention provides is energy-efficient, safe and reliable.
Accompanying drawing explanation
For the technical scheme being illustrated more clearly that in the embodiment of the present invention, in embodiment being described below required for make
Accompanying drawing be briefly described, it should be apparent that, below describe in accompanying drawing be only some embodiments of the present invention, for
From the point of view of those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtain other according to these accompanying drawings
Accompanying drawing, wherein:
Fig. 1 is the cross-section structure simplified schematic diagram of gas-fired condensing boiler one embodiment of the present invention；
Fig. 2 is the structural representation of the heat-exchanger rig of the gas-fired condensing boiler shown in Fig. 1；
Fig. 3 is the structural representation of the heat exchanger of the gas-fired condensing boiler shown in Fig. 1.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Describe, it is clear that described embodiment is only a part of embodiment of the present invention rather than whole embodiments wholely.Based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under not making creative work premise
Embodiment, belongs to the scope of protection of the invention.
Refer to the cross-section structure simplified schematic diagram that Fig. 1, Fig. 1 are gas-fired condensing boiler one embodiments of the present invention.The present invention is real
The gas-fired condensing boiler executing example includes burner 21, cylinder 22, corrugated internal furnace combustor 23, reversal chamber 24, heat-exchanger rig 25, returns
Water tank 26, inlet of cold air 27, hot air outlet 28, heat exchanger 29, chimney 30, water supply tank 31, outlet pipe 32.
Burner 21 uses Metal Fibre Combustion formula burner 21 for fuel combustion, the burner of the present embodiment,
Being can to reach 2500kw/ using specialty metal fiber as burning surface, combustion intensity, flame is short, only conventional diffusion formula
/ 3rd of flame.So, combustor is a lot of with regard to relative decrease, and boiler overall dimensions reduces.Corrugated internal furnace combustor 23 is whole
Body is cylinder, and the outer wall of cylinder 22 uses insulation outer casing, the temperature within keeping boiler.Corrugated internal furnace combustor 23 energy
Enough heat transfers in strengthening burner hearth.
It it is the structural representation of the heat-exchanger rig of the gas-fired condensing boiler shown in Fig. 1 incorporated by reference to reference Fig. 2, Fig. 2.Cylinder 22
Inside being provided with heat-exchanger rig 25, the top of heat-exchanger rig 25 is provided with water inlet 251 and outlet flue 252, bottom are provided with outlet 253 and
Smoke inlet 254, in the present embodiment, the water that water inlet 251 is come in is the backwater after return water tank 26 heat exchange, outlet
253 water flowed out enter cylinder 22 bottom, and the cigarette that smoke inlet 254 is come in is the flue gas entered from reversal chamber 24, and outlet flue 252 flows
The cigarette gone out is the flue gas of the cooling after carrying out heat exchange.The inwall of heat-exchanger rig 25 is provided with water spraying tray 255, and water spraying tray 255 has
Multiple holes, backwater passes through multiple hole and carries out heat exchange with flue gas.In the present embodiment, water spraying tray 255 is multiple, and in vertically side
Upwards it is spaced setting.Adjacent one of them one end of water spraying tray 255 is connected with the left wall of heat-exchanger rig 25, and the other end fills with heat exchange
Put the right wall of 25 to be not connected to；Another one end of adjacent water spraying tray is not connected to the left wall of heat-exchanger rig 25, the other end and heat exchange
The right wall of device 25 connects.The flue gas time of staying in cylinder 22 can be extended by above-mentioned setting, allow flue gas fully participate in
Heat exchange.In the present embodiment, water spraying tray 255 is sieve-like stephanoporate steel plate, and backwater is dispersed into, by multiple holes, the water that multiply is tiny
Stream, current are column or drops, will not be taken away by flue gas, and heat exchange effect is good.
Heat-exchanger rig 25 top is provided with return water tank 26, and the right-hand member of cylinder 22 is provided with inlet of cold air 27, and left end is provided with heat
Air outlet slit 28, the upper end of cylinder 22 is provided with backwater import, is provided with heat exchanger 29 in return water tank 26, returning from heating system
Water enters from backwater import and carries out heat exchange with the cold air entered from inlet of cold air 27, becomes heat after cold air heat exchange
Air flows out from hot air outlet 28.
Incorporated by reference to the structural representation of heat exchanger refering to Fig. 3, Fig. 3 being the gas-fired condensing boiler shown in Fig. 1.The present invention is real
The heat exchanger 29 executing example includes base tube 1, and the cross section of this base tube 1 is rounded, and the outer surface of base tube 1 forms the wing that multi-turn is placed equidistant
Sheet 2, fin 2 can be placed equidistant twist in the outer surface of base tube 1, it is possible to is placed equidistant in the appearance of base tube 1 for H-shaped fin
Face, those skilled in the art can be arranged as the case may be, it is preferable that the height of the fin 2 that the outer surface of base tube 1 is formed is 5-
8mm.The inner surface of base tube 1 is formed with screw thread 3 or the fin (not shown) that multi-turn is placed equidistant, base tube 1, the outer surface of base tube 1
The fin 2 and the screw thread 3 that are formed use material of the same race one-body molded.
The heat exchanger of the present invention has the advantage that
1. volume is little, lightweight, it is simple to install.Traditional heat exchanger volume is huge, in the operating mode meeting identical thermic load
Time, female thread external finned tube heat exchanger volume only has again about the 1/10 of conventional tube shell heat exchanger, and floor space is little, saves sky
Between；The most also because volume is little, lightweight, installation, dismounting are easily facilitated.
2. fouling is few, easy to maintenance.Fouling of heat exchangers can directly reduce heat transfer effect, does not reaches technological requirement, and impact is raw
Producing efficiency, increase maintenance cost, therefore reduce fouling tendency is female thread external finned tube formula design of heat exchanger key factor as far as possible.
Female thread external finned tube is the quantity of circulating water different according to user, the pitch of design heat exchanger tube helix and the degree of depth of screw thread, rolls
The spiral heat exchange tube part of system, utilizes fluid with certain flow rate rotational flow in special spiral grooved tube, reaches turbulence state,
The flow velocity of near-wall increases, transversal flow tube wall, makes incrustation scale adhere to less than on tube wall；Its two be this heat exchanger tube be to use special work
The heat exchange element that skill makes, per se with the ability expanded with heat and contract with cold, shrinks and expansion energy plays self-cleaning effect；It three is that this changes
Heat pipe, when properly functioning, owing to passing through at special serpentine pipe, can produce fixed range dither, make the impurity in medium
Being in suspended state, this is also to make the tube wall will not the key factor of dirty.
3. heatproof, pressure, the life-span is long.The heat-exchanging tube bundle of female thread external finned tube heat exchanger uses identical material with tube sheet,
There is the unified coefficient of expansion, the deformation of heat exchanger will not be caused due to pressure, temperature variation.Heat exchanger subtracts without installing additional
Temperature, decompressor, high-temperature resistant 400 DEG C, pressure 5.3MPa.
The most energy-efficient.Female thread external finned tube heat exchanger, because of the design of its uniqueness, significantly increases exchange capability of heat, especially
When there being the heat-exchanging state of phase transformation, relatively traditional heat exchangers more has significant advantage.Under the soda pop exchange operating mode such as steam heating water,
Conventional shell-and-tube heat exchanger coefficient of heat transfer k value is typically up to 6000W/ (m2DEG C), female thread external finned tube heat exchanger its
Coefficient of heat transfer k value may be up to 14000W/ (m2℃)。
What deserves to be explained is, the gas-fired condensing boiler of the embodiment of the present invention also includes that water supply tank 31, water supply tank 31 are used for
When water in cylinder 22 lacks, moisturizing in cylinder 22.
Being described above the structure of the gas-fired condensing boiler of the embodiment of the present invention, 1-3 explanation combustion gas is cold below in conjunction with the accompanying drawings
The work process of solidifying boiler.
Combustion air enters return water tank 26 by inlet of cold air 27, is entered by heat exchanger 29 in return water tank 26
Row heat exchange makes return water temperature reduce, cold air heating heating air, and hot-air enters burner 21 by hot-flow flue and participates in combustion
Burn.Natural gas enters burner 21 and also fully burns in corrugated internal furnace combustor 23, the high-temperature flue gas of generation be immersed in water
In corrugated internal furnace combustor 23 carry out heat exchange, the flue gas after heat exchange enters heat-exchanger rig 25, heat-exchanger rig by reversal chamber 24
25 receive backwater after return water tank 26 heat exchange and directly contact with flue gas and carry out heat exchange, after heat exchange, cooled flue gas,
Heating backwater, flue gas enters air by chimney 30.Heated backwater flows into the bottom of cylinder 22, is burnt by corrugated internal furnace
Room 23 is heated, and is extracted out by water circulating pump through outlet pipe 32 after being finally reached preset temperature, participates in heating system heat supply.
The gas-fired condensing boiler of the embodiment of the present invention has the advantage that
1. because using the mode of air water direct heat transfer, simplifying boiler structure, reducing heat exchange area, boiler takes up an area face
Long-pending little, expend steel few, low cost of manufacture.
2. flue gas and water are when direct heat transfer, and the condensed water that the water recovery in flue gas becomes is blended in water, plays back
Receiving the effect of condensed water, this is particularly important to the area of the droughts such as Xinjiang.
3. flue gas and water are when direct heat transfer, and when water heats up, the dissolubility of oxygen reduces, and serves the effect of deoxygenation, system without
Need oxygen-eliminating device, decrease the oxygen corrosion of heating surface, extend the service life of boiler.
4. use corrugated internal furnace, the heat transfer in strengthening burner hearth.
5. use Metal Fibre Combustion formula burner, reduce combustion chamber volume.
6. using trickle disc type heat-exchanger rig, backwater passes through gravity fall, it is not necessary to any energy, power and energy saving.
The foregoing is only embodiments of the invention, not thereby limit the scope of the claims of the present invention, every utilize this
Equivalent structure or equivalence flow process that bright description and accompanying drawing content are made convert, or are directly or indirectly used in other relevant skills
Art field, is the most in like manner included in the scope of patent protection of the present invention.
Claims (10)
1. a gas-fired condensing boiler, it is characterised in that the flue gas of described gas-fired condensing boiler generation and the backwater of heating system
Directly contact carries out heat exchange.
Gas-fired condensing boiler the most according to claim 1, it is characterised in that described gas-fired condensing boiler includes cylinder, institute
Stating heat-exchanger rig to be located in described cylinder, the inwall of described heat-exchanger rig is provided with water spraying tray, and described water spraying tray has multiple hole, institute
State backwater to pass through flue gas described in the plurality of Kong Houyu and carry out direct heat exchange.
Gas-fired condensing boiler the most according to claim 2, it is characterised in that described water spraying tray is multiple, and in vertically side
Upwards it is spaced setting.
Gas-fired condensing boiler the most according to claim 3, it is characterised in that adjacent one of them one end of described water spraying tray
Being connected with the left wall of described heat-exchanger rig, the other end is not connected to the right wall of described heat-exchanger rig；Adjacent described water spraying tray is another
One one end is not connected to the left wall of described heat-exchanger rig, and the other end is connected with the right wall of described heat-exchanger rig.
Gas-fired condensing boiler the most according to claim 2, it is characterised in that described heat-exchanger rig top is provided with backwater water
Case, one end of described cylinder is provided with inlet of cold air, and the other end is provided with hot air outlet, and the upper end of described cylinder is provided with backwater and enters
Mouthful, be provided with heat exchanger in described return water tank, from described heating system backwater from described backwater import enter and with from institute
The cold air stating inlet of cold air entrance carries out heat exchange, becomes hot-air and go out from described hot-air after described cold air heat exchange
Mouth flows out.
Gas-fired condensing boiler the most according to claim 5, it is characterised in that described heat exchanger includes that a cross section is rounded
Base tube, the outer surface of described base tube forms the fin that multi-turn is placed equidistant, and the inner surface of described base tube is formed with multi-turn and equidistantly sets
The screw thread put or fin.
Gas-fired condensing boiler the most according to claim 6, it is characterised in that described gas-fired condensing boiler also includes burning
Device, described hot-air enters described burner by hot-flow flue and participates in burning.
Gas-fired condensing boiler the most according to claim 7, it is characterised in that described gas-fired condensing boiler also includes ripple stove
Gallbladder combustor, described corrugated internal furnace combustor is located at described inner barrel, and described air enters described combustion by described burner
Burning room and participate in burning, the flue gas produced after burning carries out heat exchange with the water being coated on outside described combustor.
Gas-fired condensing boiler the most according to claim 8, it is characterised in that described gas-fired condensing boiler also includes turning to
Room, the flue gas produced after burning enters described heat-exchanger rig by described reversal chamber after heat exchange.
Gas-fired condensing boiler the most according to claim 9, it is characterised in that described gas-fired condensing boiler also includes chimney,
Described chimney is connected with described heat-exchanger rig, and after described flue gas carries out heat exchange in described heat-exchanger rig, temperature reduces and passes through
Described chimney is discharged.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610575101.0A CN106066092A (en) | 2016-07-19 | 2016-07-19 | Gas-fired condensing boiler |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610575101.0A CN106066092A (en) | 2016-07-19 | 2016-07-19 | Gas-fired condensing boiler |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106066092A true CN106066092A (en) | 2016-11-02 |
Family
ID=57206611
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610575101.0A Pending CN106066092A (en) | 2016-07-19 | 2016-07-19 | Gas-fired condensing boiler |
Country Status (1)
| Country | Link |
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| CN (1) | CN106066092A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108895666A (en) * | 2018-05-23 | 2018-11-27 | 晋中天绿环保科技开发有限公司 | A kind of direct-cooled condensing boiler of hot water |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0323391D0 (en) * | 2001-10-13 | 2003-11-05 | Robertson Alastair | Improved heating system |
| CN202149482U (en) * | 2011-07-22 | 2012-02-22 | 山东金洲矿业集团有限公司 | Coal saver for boiler |
| CN203837005U (en) * | 2014-04-23 | 2014-09-17 | 黑龙江双锅锅炉股份有限公司 | Boiler water circulation system with air preheat function |
| CN204373218U (en) * | 2014-12-30 | 2015-06-03 | 哈尔滨果岭科技发展有限公司 | Based on the Condensing Gas-fired Boiler with Direct Contact Heat of air wetting |
| CN105157228A (en) * | 2015-08-22 | 2015-12-16 | 郑州大学 | Water-tube type central-reverse-flame and condensation integrated boiler |
-
2016
- 2016-07-19 CN CN201610575101.0A patent/CN106066092A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB0323391D0 (en) * | 2001-10-13 | 2003-11-05 | Robertson Alastair | Improved heating system |
| CN202149482U (en) * | 2011-07-22 | 2012-02-22 | 山东金洲矿业集团有限公司 | Coal saver for boiler |
| CN203837005U (en) * | 2014-04-23 | 2014-09-17 | 黑龙江双锅锅炉股份有限公司 | Boiler water circulation system with air preheat function |
| CN204373218U (en) * | 2014-12-30 | 2015-06-03 | 哈尔滨果岭科技发展有限公司 | Based on the Condensing Gas-fired Boiler with Direct Contact Heat of air wetting |
| CN105157228A (en) * | 2015-08-22 | 2015-12-16 | 郑州大学 | Water-tube type central-reverse-flame and condensation integrated boiler |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108895666A (en) * | 2018-05-23 | 2018-11-27 | 晋中天绿环保科技开发有限公司 | A kind of direct-cooled condensing boiler of hot water |
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