CN103196218B - Malleation injection type full premix combustion heating plant - Google Patents
Malleation injection type full premix combustion heating plant Download PDFInfo
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- CN103196218B CN103196218B CN201310135997.7A CN201310135997A CN103196218B CN 103196218 B CN103196218 B CN 103196218B CN 201310135997 A CN201310135997 A CN 201310135997A CN 103196218 B CN103196218 B CN 103196218B
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Abstract
The invention discloses a kind of malleation injection type full premix combustion heating plant, including supply air system, fuel system, combustor, heat-exchange system and smoke evacuation system, supply air system includes blower fan and the air distribution being connected with its air outlet, fuel system includes Gas Pipe and coupled gas distribution pipe, the end of gas distribution pipe has been evenly arranged one group of gas nozzle, the periphery of gas nozzle is provided with the annular air scoop through with air distribution, the position aligned with gas nozzle is provided with inspirator mixer, and its top is provided with distributing pore plate and orifice from bottom to top；Combustor is located at the top of inspirator mixer, is provided with annular hole between its sidewall and outline of orifice.Present configuration is compact, being easy to whole system is taked security control, when heating plant runs, completely, in combustion product, the discharge capacity of carbon monoxide and nitrogen oxides is relatively low for combustion gas and air mixing, make combustion gas and air full premix combustion, it is achieved that the low stain thing discharge of fuel gas buring process.
Description
Technical field
The present invention relates to a kind of system utilizing combustion gas to carry out heat supply, domestic hot-water supply, particularly relate to a kind of malleation injection type full premix combustion heating system.
Background technology
Gas heating system is the device that the heat utilizing fuel gas buring process to discharge heats to heat supply working medium (water).Wherein the combustion system of combustion gas is divided into partially premixed burning and full premix combustion.Partly-premixed combustion process nitrogen oxides is higher, and along with environmental requirement is more and more higher, partly-premixed combustion system is eliminated gradually.Full premix combustion mode has the advantage of pollutant low emission, and all-premixing burner mostly is cylinder type, and what match is cylinder type heat exchanger.But thing followed problem is owing to height wanted by cylinder type heat exchanger cost opposite fins formula heat exchanger, and the hybrid system that cylinder type all-premixing burner needs is more complex and high cost, has thus resulted in the gross investment and costly of whole gas heating system.
Summary of the invention
For above-mentioned prior art Problems existing, the present invention provides a kind of malleation injection type full premix combustion heating plant, and present system does not still adopt full premix combustion mode, and simple in construction, investment are less.
In order to solve above-mentioned technical problem, the technical scheme that malleation injection type full premix combustion heating plant of the present invention is achieved is: include supply air system, fuel system, combustor, heat-exchange system and smoke evacuation system, described supply air system includes blower fan and the air distribution being connected with its air outlet, described fuel system includes Gas Pipe and coupled gas distribution pipe, described Gas Pipe is provided with gas electromagnetic valve, the end of described gas distribution pipe has been evenly arranged one group of gas nozzle, periphery round this group gas nozzle is provided with the annular air scoop through with described air distribution, the position aligned with described gas nozzle is provided with inspirator mixer, the top of described inspirator mixer from bottom to top be provided with distributing pore plate and orifice；Described combustor is located at the top of described inspirator mixer, is provided with the annular hole that width is 2～20mm between sidewall and the outline of described orifice of described combustor；Described heat-exchange system includes heat exchanger and hot water or cold water's pipeline, described heat exchanger is arranged on above combustor, and described heat exchanger adopts finned heat exchanger, and described finned heat exchanger is connected with hot water or cold water's pipeline, described orifice has certain radian, and arc range is 0～1rad.
Compared with prior art, the invention has the beneficial effects as follows:
The partly-premixed combustion system of the many employings of current state inner burner, NOxDischarge capacity is more than 110PPm, and present invention employing is full premix combustion mode, CO and NOxDischarge capacity substantially reduces, particularly with NOxEmission reduction effect is notable, when excess air coefficient is 1.25, and NOxLower than 40PPm.In addition, the present invention adopts multiple injector to mix, the relatively low blast that blower fan provides can meet combustion gas and air is completely mixed, this hybrid system design simple in construction, less costly relative to the blender that external all-premixing burner adopts, breach the external all-premixing burner enterprise technical monopoly to this series products.
Heating plant of the present invention utilizes combustion gas full premix combustion mode to carry out supplying hot water and domestic hot-water, and its compact conformation makes full use of combustion gas pressure itself and mixes, reduces the energy consumption of system.Heating plant of the present invention adopts flat orifice and finned heat exchanger to match, reduce the cost of system, unique combustor has annular hole to connect design, ensureing that orifice has under higher thermal intensity of fire port premise, combustor limit wall can be avoided overheated, improve the liberation of combustor.In the present invention, the cambered design of orifice can prevent the deformation that orifice high temperature produces.Due to overall optimization design so that the volume of gas heating device is relative to other homogeneous system small volumes, and processing is simple, easy to control, it is easy to operation, safe and reliable.The present invention can be used not only for business and civilian heat supply and domestic hot-water supply system, it is also possible in middle-size and small-size industrial heating and hot-water supply system.
Accompanying drawing illustrates:
Fig. 1 is the structural representation of malleation injection type full premix combustion heating plant of the present invention；
Fig. 2 is malleation injection type full premix combustion heating plant process chart of the present invention；
Fig. 3 is the ejector structure schematic diagram that the present invention is applied in gas heater hot water supply system；
Fig. 4 is the all-premixing burner structure chart that the present invention is applied in gas heater hot water supply system；
Fig. 5 is the sectional view of gas nozzle shown in Fig. 4；
Fig. 6 is the orifice structure chart that the present invention is applied in gas heater hot water supply system.
In figure:
1-blower fan 2-gas electromagnetic valve 3-inspirator mixer
4-distributing pore plate 5-orifice 6-combustor
7-finned heat exchanger 8-smoke evacuation system 9-air distribution
10-Gas Pipe 11-gas distribution pipe 12-water inlet pipe
13-outlet pipe 14-annular hole 15-gas nozzle
16-collapsible tube 17-diffuser pipe
Detailed description of the invention
Below in conjunction with detailed description of the invention, the present invention is described in further detail.
As it is shown in figure 1, one malleation injection type full premix combustion heating plant of the present invention, including supply air system, fuel system, combustor 6, heat-exchange system and smoke evacuation system 8,
Described supply air system includes the air distribution 9 being connected with blower fan 1 air outlet, and described blower fan is centrifugal blower, the one in described ventilator selection direct current and AC system blower fan.
Described fuel system includes the gas distribution pipe 11 being connected with Gas Pipe 10, described Gas Pipe 10 is additionally provided with gas electromagnetic valve 2, the end of described gas distribution pipe 11 has been evenly arranged one group of gas nozzle 15, periphery round this group gas nozzle 15 is provided with the annular air scoop through with described air distribution 9, the position aligned with described gas nozzle 15 is provided with inspirator mixer 3, the top of described inspirator mixer 3 from bottom to top be provided with distributing pore plate 4 and orifice 5；Described orifice is flat orifice, and the fire hole on described orifice is shaped as the one in square, circular and the shape of a hoof, wherein, it is preferable that shape of a hoof fire hole structure, and this shape of a hoof fire hole can effectively prevent the thermal oscillation that combustion process produces.
Described combustor 6 is located at the top of described inspirator mixer 3, for there being annular hole to be connected between described combustor 6 and orifice 5, it is provided with, between sidewall and the outline of described orifice 5 of described combustor 6, the gap that width is 2～20mm, cooling air can be entered by this annular hole, to cool down the limit wall of combustor 6.
Described heat-exchange system includes heat exchanger and hot water or cold water's pipeline, and described heat exchanger is arranged on above combustor 6, and described heat exchanger adopts finned heat exchanger 7, specific to the row of this finned heat exchanger, then matches with burner and thermic load；Described finned heat exchanger 7 is connected with hot water or cold water's pipeline.
The work process of malleation injection type full premix combustion heating plant of the present invention is: as depicted in figs. 1 and 2, blower fan 1 is primarily used to the air providing burning required, the air inlet of blower fan 1 and atmosphere, air enters air distribution 9 from the air outlet of blower fan 1 after blower fan 1 boosts, air pressure is malleation, the air guide functions by air distribution 9, the annular air air inlet through being positioned at gas nozzle 15 periphery can uniformly arrive inspirator mixer 3 porch；This is simultaneously, combustion gas is entered by the entrance of Gas Pipe 10, gas distribution pipe 11 is entered after gas electromagnetic valve 2, combustion system of the present invention is premixed combustion, combustion gas and air mix before fire hole, burning does not need auxiliary air, the excess air coefficient of air is more than 1, namely combustion gas utilizes the static pressure of self, spraying through being evenly arranged on gas distribution pipe 11 one group of gas nozzle 15 so that combustion gas static pressure is changed into dynamic pressure, combustion gas obtains at high speed, combustion gas injection air at a high speed enters inspirator mixer 3, is sufficiently mixed in inspirator mixer 3；Mixed combustion gas and air mixture enter distributing pore plate 4, and the mixture through distributing pore plate 4 produces turbulent flow, enter orifice 5 and carry out combustion gas and Combustion of Premixed after strengthening mixing further；After high-temperature combustion product in combustor 6 and finned heat exchanger 7 carry out heat exchange, low-temperature flue gas is drained in air through smoke evacuation system 8, finned heat exchanger 7 with enter (cold) water pipe 12 and go out being attached for, backwater of (heat) water pipe 13 or heat supply pipeline, water completes after heat exchange heats up, to supply user through the outlet pipe 13 of finned heat exchanger 7 in finned heat exchanger 7.
A kind of gas heating device utilizing combustion gas full premix combustion mode to carry out supplying hot water and domestic hot-water of the present invention, compact conformation, make full use of what combustion gas self-energy carried out mixing, reduce the energy consumption of system.System adopts flat orifice and finned heat exchanger to match, reducing the cost of system, unique combustor has gap to connect design, is ensureing that orifice has under higher thermal intensity of fire port premise, combustor limit wall can be avoided overheated, improve the liberation of combustor.Additionally, flat orifice has certain radian, thermal stress deformation under hot conditions can be prevented.Due to the fact that the optimization of entirety design so that the volume of gas heating device is relative to other homogeneous system small volumes, and processing is simple, easy to control, it is easy to operation, safe and reliable.Present invention is mainly used for business and civilian heat supply and domestic hot-water supply system, it is also possible in middle-size and small-size industrial heating and hot-water supply system.
Embodiment:
The present invention is particularly applicable in gas heater system, this gas heater mainly provides domestic hot-water, its block diagram fonn is as it is shown in figure 1, critical piece includes all-premixing burner, DC fan selected by copper finned heat exchanger 7, gas electromagnetic valve 2, blower fan 1.Gas heater system heat load is 22kW, and the concrete structure figure of all-premixing burner is shown in Fig. 3, wherein, 3 is inspirator mixer, 4 is distributing pore plate, and 5 is orifice, and the inside of this all-premixing burner comprises 11 inspirator mixers 3, the physical dimension of inspirator mixer is shown in Fig. 4, wherein, 9 is air distribution, and 15 is gas nozzle, 16 is collapsible tube, and 17 is diffuser pipe；The structure of gas nozzle 15 refers to Fig. 5, and the version of orifice 5 is as shown in Figure 6.Experiments verify that and obtain: all-premixing burner experimental result and prototype testing result comparing result are in Table 1.Same as can be seen from Table 1 is under 1.5 conditions at air coefficient, and NO discharge capacity of the present invention is the 10% of prototype, and CO discharge capacity is the 45% of prototype, and NO and CO emission reduction effect is notable.
Table 1 present invention is applied in the measured data of gas heater hot water supply system.
Although above in conjunction with figure, invention has been described; but the invention is not limited in above-mentioned detailed description of the invention; above-mentioned detailed description of the invention is merely schematic; rather than it is restrictive; those of ordinary skill in the art is under the enlightenment of the present invention; without deviating from the spirit of the invention, it is also possible to make many variations, these belong within the protection of the present invention.
Claims (5)
1. a malleation injection type full premix combustion heating plant, including supply air system, fuel system, combustor (6), heat-exchange system and smoke evacuation system (8), it is characterised in that:
Described supply air system includes blower fan (1) and the air distribution (9) being connected with its air outlet；
Described fuel system includes Gas Pipe (10) and coupled gas distribution pipe (11), described Gas Pipe (10) is additionally provided with gas electromagnetic valve (2), the end of described gas distribution pipe (11) has been evenly arranged one group of gas nozzle (15), periphery round this group gas nozzle (15) is provided with the annular air scoop through with described air distribution (9), the position aligned with described gas nozzle (15) is provided with inspirator mixer (3), the top of described inspirator mixer (3) is provided with distributing pore plate (4) and orifice (5) from bottom to top；
Described combustor (6) is located at the top of described inspirator mixer (3), is provided with the annular hole (14) that width is 2～20mm between sidewall and the outline of described orifice (5) of described combustor (6)；
Described heat-exchange system includes heat exchanger and hot water or cold water's pipeline, described heat exchanger is arranged on combustor (6) top, described heat exchanger adopts finned heat exchanger (7), and described finned heat exchanger (7) is connected with hot water or cold water's pipeline.
2. a kind of malleation injection type full premix combustion heating plant according to claim 1, it is characterised in that described orifice is arc orifice, and arc range is 0～1rad, and the fire hole on described orifice is shaped as the one in square, circular and the shape of a hoof.
3. a kind of malleation injection type full premix combustion heating plant according to claim 1, it is characterised in that described blower fan is centrifugal blower, the one in described ventilator selection direct current and AC system blower fan.
4. a kind of malleation injection type full premix combustion heating plant according to claim 1, it is characterised in that described hot water or cold water's pipeline is provided with valve.
5. a kind of malleation injection type full premix combustion heating plant according to claim 1, it is characterized in that, the single load of described gas nozzle is 1～5kW, the corresponding inspirator mixer of each gas nozzle, the number of gas nozzle and inspirator mixer depends on the rated heat input, rated heat load of heating plant.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201310135997.7A CN103196218B (en) | 2013-04-18 | 2013-04-18 | Malleation injection type full premix combustion heating plant |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310135997.7A CN103196218B (en) | 2013-04-18 | 2013-04-18 | Malleation injection type full premix combustion heating plant |
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| CN103196218A CN103196218A (en) | 2013-07-10 |
| CN103196218B true CN103196218B (en) | 2016-06-29 |
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| CN201310135997.7A Expired - Fee Related CN103196218B (en) | 2013-04-18 | 2013-04-18 | Malleation injection type full premix combustion heating plant |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103727653A (en) * | 2013-12-23 | 2014-04-16 | 天津城建大学 | Negative-pressure injection type full-premix sectional combustion heating device |
| US10823400B2 (en) | 2014-01-09 | 2020-11-03 | A.O. Smith Corporation | Multi-cavity gas and air mixing device |
| CN104373937B (en) | 2014-11-13 | 2017-04-12 | 艾欧史密斯(中国)热水器有限公司 | Fuel gas premixing burner and fuel gas water heater |
| KR101596715B1 (en) * | 2014-11-25 | 2016-02-23 | 주식회사 경동나비엔 | Combustion apparatus having structure for cooling combustion chamber |
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| CN2233044Y (en) * | 1995-03-02 | 1996-08-14 | 冷新华 | Super-short injection energy-saving gas stove |
| CN2603312Y (en) * | 2003-01-28 | 2004-02-11 | 王晓波 | Jet-leading type full premixing combustion gas range |
| CN201858643U (en) * | 2010-08-24 | 2011-06-08 | 上海禾森机电有限公司 | Burner for dual-purpose gas boiler for household gas water heater |
| CN102374532A (en) * | 2010-08-24 | 2012-03-14 | 上海禾森机电有限公司 | Completely-premixed gas burner |
| CN203190603U (en) * | 2013-04-18 | 2013-09-11 | 天津城市建设学院 | Positive-pressure ejection type full premixed combustion heat supply device |
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2013
- 2013-04-18 CN CN201310135997.7A patent/CN103196218B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2233044Y (en) * | 1995-03-02 | 1996-08-14 | 冷新华 | Super-short injection energy-saving gas stove |
| CN2603312Y (en) * | 2003-01-28 | 2004-02-11 | 王晓波 | Jet-leading type full premixing combustion gas range |
| CN201858643U (en) * | 2010-08-24 | 2011-06-08 | 上海禾森机电有限公司 | Burner for dual-purpose gas boiler for household gas water heater |
| CN102374532A (en) * | 2010-08-24 | 2012-03-14 | 上海禾森机电有限公司 | Completely-premixed gas burner |
| CN203190603U (en) * | 2013-04-18 | 2013-09-11 | 天津城市建设学院 | Positive-pressure ejection type full premixed combustion heat supply device |
Non-Patent Citations (1)
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| 平板式预混燃烧器的污染物排放特性实验研究;刘凤国等;《中国土木工程学会 燃气分会 应用专业委员会 2012年年会论文集》;20121231;正文第108页至第109页第2段、附图1-2 * |
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