CN215808461U - Burner, combustion assembly, combustor and water heater - Google Patents
Burner, combustion assembly, combustor and water heater Download PDFInfo
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- CN215808461U CN215808461U CN202120688414.3U CN202120688414U CN215808461U CN 215808461 U CN215808461 U CN 215808461U CN 202120688414 U CN202120688414 U CN 202120688414U CN 215808461 U CN215808461 U CN 215808461U
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Abstract
The utility model discloses a combustion device, a combustion assembly, a combustor and a water heater, wherein the combustion device comprises: the gas-fired burner comprises a burner body, a burner body and a burner, wherein the burner body is provided with a gas flow channel, a gas inlet and a gas outlet which are respectively communicated with the gas flow channel, the gas inlet is used for accessing air and fuel gas, and the gas outlet is used for outputting mixed gas; the number of the baffles is two, the two baffles are arranged on the combustion device main body at intervals, and a combustion area for combusting the mixed gas output by the gas outlet is formed between the two baffles; and the cooling body is arranged on the combustion device main body and used for cooling the flame generated by the combustion area. The utility model reduces the emission of nitrogen oxides by adopting the cooling body to locally cool the flame formed by preheating and burning.
Description
Technical Field
The utility model relates to the field of water heaters, in particular to a combustion device, a combustion assembly, a combustor and a water heater.
Background
When a burner of the water heater operates, high-temperature flue gas generated by the burner exchanges heat with the heat exchanger to form hot water. The water heater is provided with the gas valve to control the gas volume, when the burning is not sufficient, produce carbon monoxide and nitrogen oxide easily, the exhaust flue gas causes environmental pollution easily, and the energy utilization of gas also receives the influence.
SUMMERY OF THE UTILITY MODEL
The utility model mainly aims to provide a combustion device, a combustion assembly, a combustor and a water heater, aiming at solving the problem that the existing combustor has high content of nitrogen oxides and carbon monoxide.
In order to achieve the above object, the present invention provides a combustion apparatus comprising:
the gas-fired burner comprises a burner body, a burner body and a burner, wherein the burner body is provided with a gas flow channel, a gas inlet and a gas outlet which are respectively communicated with the gas flow channel, the gas inlet is used for accessing air and fuel gas, and the gas outlet is used for outputting mixed gas;
the number of the baffles is two, the two baffles are arranged on the combustion device main body at intervals, and a combustion area for combusting the mixed gas output by the gas outlet is formed between the two baffles; and
and the cooling body is arranged on the burner main body and used for cooling the flame generated by the combustion area.
Optionally, the cooling body is disposed through the baffle.
Optionally, the cooling body is arranged on a side of the combustion zone away from the air outlet.
Optionally, a secondary air port is formed in the baffle plate, and the secondary air port penetrates through the baffle plate and is communicated with the combustion zone.
Optionally, the secondary air port is disposed proximate to the air outlet.
Optionally, the combustion device body is an atmospheric burner.
Optionally, the baffle comprises:
the first connecting plate is provided with a first side edge and a second side edge which are arranged in a back-to-back mode, and the first side edge of the first connecting plate is connected with the combustion device main body; and
the second connecting plate, the second connecting plate has third side and fourth side that sets up back to the back, the second side of first connecting plate with the third side of second connecting plate is connected, the fourth side of second connecting plate extends to the direction of keeping away from the burner main part, certainly the burner main part to the fourth side direction of second connecting plate, two the region that forms between the first connecting plate of baffle is the setting that gradually expands.
The utility model also proposes a combustion assembly comprising:
the combustion apparatus as described above; and
the gas distribution rod is provided with a gas distribution cavity, the number of the combustion devices is multiple, the combustion devices are arranged side by side, and the gas inlets of the combustion devices are respectively communicated with the gas distribution cavity.
Alternatively, a plurality of the combustion devices are arranged at intervals, and an air flow passage is formed between the adjacent combustion devices.
The utility model also proposes a burner comprising a first combustion chamber and a second combustion chamber communicating with each other, said burner further comprising:
the first combustion chamber and the second combustion chamber are arranged on the burner main body;
the combustion device is arranged in the first combustion chamber and is used for introducing gas and air and forming mixed gas to be preheated and combusted in the first combustion chamber; and
and the fuel gas injection assembly is provided with a fuel gas inlet and a fuel gas outlet communicated with the second combustion chamber and is used for injecting fuel gas into the second combustion chamber so as to enable the second combustion chamber to carry out high-temperature air combustion reaction.
The utility model also proposes a water heater comprising:
a body;
the combustor is arranged on the machine body; and
and the heat exchanger is arranged on the machine body and exchanges heat with the combustor.
Optionally, the water heater further comprises:
a temperature sensor for detecting a temperature within the second combustion chamber; and
the controller is electrically connected with the temperature sensor and is used for acquiring the temperature in the second combustion chamber and the heat load required by the water heater; and the gas injection assembly is also used for controlling the gas injection assembly to inject gas into the second combustion chamber when the temperature in the second combustion chamber reaches a preset temperature, so that the second combustion chamber is subjected to high-temperature air combustion, and the heat load range required by the water heater is reached.
According to the technical scheme, the cooling body is arranged to locally cool the flame formed by the combustion of the combustion device main body, so that nitrogen oxides generated by flame combustion are inhibited, the emission of the nitrogen oxides is reduced, and further the emission of harmful gases is reduced; through being used for burner with burner, the flue gas that the messenger preheated the burning and formed carries out the high temperature air burning in the second combustion chamber, further burns preheating combustion gas to reduce the carbon monoxide in the gas, produce high temperature flue gas, and then the content of nitrogen oxide and carbon monoxide in the flue gas that makes the combustor produce reduces, promotes the combustion efficiency of gas.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a combustion apparatus according to an embodiment of the present invention;
FIG. 2 is a left side view of an embodiment of the combustion apparatus body of the present invention;
FIG. 3 is a schematic structural view of an embodiment of the combustion assembly of the present invention;
FIG. 4 is a schematic structural diagram of a burner according to an embodiment of the present invention.
The reference numbers illustrate:
the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The utility model provides a combustion device which can be used for a combustor, wherein the combustion device is connected with gas and air and burns to form high-temperature flue gas. The combustor can be used for water heaters, wall-mounted furnaces and other electrical equipment which form hot water through heat exchange. For convenience of description, the burner is described as a water heater. Fig. 1 to 4 are corresponding drawings of an embodiment of the present invention.
Referring to fig. 1 and 2, the combustion apparatus includes:
the gas burner comprises a burner body 30, wherein the burner body 30 is provided with a gas flow channel 33, and a gas inlet 31 and a gas outlet 32 which are respectively communicated with the gas flow channel 33, the gas inlet 31 is used for receiving air and fuel gas, and the gas outlet 32 is used for outputting mixed gas; the combustion device main body 30 is provided with a cavity inside, the cavity forms the airflow channel 33, gas and air enter the airflow channel 33 from the gas inlet 31, and when the gas flows in the airflow channel 33, the gas and the air can be fully mixed, so that the gas flow is output from the gas outlet 32, and the mixed gas is uniformly mixed. When the gas outlet ignition device 24 is ignited to form flame, the fuel gas in the mixed gas can be fully combusted. In this embodiment, the combustion apparatus main body 30 may be an atmospheric burner or other injection type burners. When the gas mixing device operates, gas enters the gas flow channel 33 through the gas inlet 31, the gas jets air to enter the gas flow channel 33, and the gas and the air can be quickly mixed through quick jet flow of the gas flow to form mixed gas.
The number of the baffle plates 34 is two, the two baffle plates 34 are arranged on the combustion device main body 30 at intervals, and a combustion area 35 for combustion of the mixed gas output from the gas outlet 32 is formed between the two baffle plates 34. The two baffles 34 are used for forming a combustion area 35 at the position of the gas outlet 32 of the combustion device main body 30, and when the mixed gas is output from the gas outlet 32, the mixed gas is combusted in the combustion area 35 formed by the baffles 34. The baffle 34 can be used to block the impact of the external air flow on the combustion of the mixed gas, and helps to improve the stability of the flame.
The cooling body 40 is arranged on the burner main body and used for cooling the flame formed by the combustion in the combustion area; when the mixed gas sprayed by the combustion device enters the combustion area and is ignited to form flame, the cooling body 40 is used for cooling the flame so as to reduce the temperature of the flame, and the generation of nitrogen oxides can be inhibited by locally cooling the flame. The cooling body 40 is used for locally cooling flame formed by burning the mixed gas jetted by the combustion device, the cooling body 40 may be a hollow copper pipe, and a cooling medium is input into the hollow copper pipe, so that the cooling body 40 forms a local low-temperature state. The cooling body 40 can also take other forms of construction.
As shown in fig. 1, the combustion apparatus main body 30 injects gas from below to above, and the combustion area 35 formed by the two baffles 34 can block the airflow from escaping to the left and right sides, and further, the gas can be sufficiently combusted in the combustion area 35. Because the baffle 34 forms the combustion area 35 for the flame is concentrated in the combustion area 35, the cooling body 40 can concentrate the cooling to the flame, when the cooling body 40 wears to establish the combustion area 35, the cooling body 40 can fully act on the flame, makes the flame can form carbon monoxide, and the nitrogen oxide that the flame produced has been restrained. Due to the shielding of the airflow outside the combustion zone 35 by the baffle 34, the flame of the combustion zone 35 can be kept stable, and the gas can be fully and sufficiently combusted inside the combustion zone 35. By adopting the two baffles 34 to form the combustion zone 35, the direction of the flame formed by the combustion of the mixed gas injected by the combustion device main body 30 can be limited by the combustion zone 35, so that the heat generated by the combustion can be directionally transferred, and further, the heat can be transferred according to the preset direction according to the internal layout of the combustor. Taking the arrangement mode as shown in fig. 1 as an example, two baffles 34 can block the direction of flame, the combustion device main body 30 is arranged towards the first combustion chamber 21, and the gas injected from the gas outlet 32 burns upwards to form a trend of upward heat transfer, so that the heat can be transferred to a preset direction in a concentrated manner, and further, the heat energy generated by gas combustion is fully utilized.
The cooling body 40 is used to locally cool the flame formed in the combustion zone 35, and the installation manner of the cooling body 40 may be determined according to the specific form and installation manner of the combustion apparatus main body 30. Optionally, the cooling body 40 is disposed through the baffle 34, and the cooling body 40 brings local heat of the flame to other parts of the combustor. The baffle 34 may be used to support the cooling body 40, so as to facilitate fixing the cooling body 40. When being provided with a plurality of when burner, cooling body 40 can run through a plurality of in proper order burner, and then the realization is a plurality of the flame that burner formed cools down.
Since the outer flame temperature of the flame is relatively high, optionally, the cooling body 40 is disposed on a side of the combustion zone 35 away from the air outlet 32, so that the cooling body 40 can locally cool the outer flame. When the cooling body 40 is installed, the cooling body 40 may be disposed through the combustion zone 35 along a direction perpendicular to the plane of the baffle 34, or may be arranged in other directions.
Referring to fig. 2, in order to improve the combustion efficiency of the fuel gas, in an embodiment, a secondary air port 36 is disposed on the baffle 34, the secondary air port 36 is disposed through the baffle 34 and communicated with the combustion area 35, and the secondary air port 36 is used for communicating the combustion area 35 with the outside of the baffle 34. When the combustion apparatus is operated, the air introduced from the air inlet 31 is primary air, and is used for mixing with fuel gas to promote combustion. The secondary air introduced from the secondary air port 36 can be used to improve the combustion efficiency of the fuel gas, thereby reducing the problem of increase of nitrogen oxides due to insufficient combustion. The secondary air port 36 is used to increase the air content in the combustion zone 35, improve the air-fuel ratio of the combustion zone 35, and further reduce the content of nitrogen oxides in the flue gas formed by combustion. When will burner is used for the combustor that has first combustion chamber and second combustion chamber, the combustor preheats the burning in first combustion chamber, because when cooling body 40 carries out local cooling to flame, leads to carbon monoxide content to increase, and high temperature flue gas via carry out high temperature air burning in the second combustion chamber 22, can further increase the combustion efficiency in the second combustion chamber 22 for the gas that the gas injection subassembly was imported to in the second combustion chamber 22 has higher combustion efficiency, makes the gas that the gas injection subassembly jetted fully burns, further reduces the content of harmful gas in the high temperature flue gas that the second combustion chamber 22 produced.
The location of the secondary air ports 36 may be determined based on the shape and size of the baffle 34. Optionally, the secondary air port 36 is disposed proximate the air outlet 32. When the combustion area 35 is used for combustion, a high-temperature area is formed in the combustion area 35, a tendency that low-temperature air outside the baffle 34 is sucked into the combustion area 35 is formed, when secondary air enters the combustion area 35 through the secondary air port 36, a turbulent flow effect can be exerted on gas emitted from the air outlet 32, and then the gas output from the air outlet 32 can be fully mixed, so that the combustion of fuel gas is more sufficient. When the secondary air is right the gas of gas outlet 32 output produces the vortex, can be right gas combustion in the combustion area 35 forms flame and plays the steady flame effect, makes the flame that burner formed is more stable, avoids leaving the flame. By stabilizing the flame formed by the combustion device, a stable combustion state can be formed after the gas is injected into the combustion zone 35, which further contributes to reducing the problem of an increase in the amount of harmful gas due to unstable combustion.
Because a high-temperature combustion state is formed in the combustion zone 35, when the secondary air enters the region close to the air outlet 32 only through the secondary air port 36, the hot air flow at the position of the air outlet 32 can be driven in the direction away from the air outlet 32, so that the temperature at the position of the air outlet 32 can be reduced, and the tempering at the position of the air outlet 32 of the combustion device is avoided. By reducing the problems of flame separation and backfire of the combustion device, the combustion efficiency of the combustion device can be effectively improved, the utilization rate of fuel gas is improved, and the efficiency of the combustor is improved.
Referring to fig. 1 and 2, in an embodiment, the baffle 34 includes: a first connecting plate 341, the first connecting plate 341 having a first side and a second side opposite to each other, the first side of the first connecting plate 341 being connected to the combustion apparatus main body 30; the second connecting plate 342 has a third side and a fourth side that are opposite to each other, the second side of the first connecting plate 341 is connected to the third side of the second connecting plate 342, the fourth side of the second connecting plate 342 extends in a direction away from the combustion apparatus main body 30, and an area formed between the first connecting plates 341 of the two baffles 34 is gradually enlarged from the combustion apparatus main body 30 to the fourth side of the second connecting plate 342. Each of the baffles 34 is formed by combining one of the first connection plates 341 and one of the second connection plates 342, the first connection plates 341 are disposed close to the combustion device main body 30, and the second connection plates 342 are disposed away from the combustion device main body 30. The first connecting plates 341 of the two baffles 34 are oppositely arranged, and the second connecting plates 342 of the two baffles 34 are oppositely arranged, so that the combustion zone 35 is formed between the two baffles 34.
The second connecting plates 342 of the two baffles 34 can be arranged in parallel to form a stable combustion area 35, the first connecting plates 341 of the two baffles 34 form an open area, and when the air flow is sprayed from the air outlet 32 to enter the area formed by the first connecting plates 341 of the two baffles 34, the air flow is in a diffusion state, so that the air and the fuel gas in the air flow can be more fully mixed, and the mixed gas can be more fully combusted.
When the baffle 34 is provided with the secondary air port 36, the secondary air port 36 penetrates through the first connecting plates 341, secondary air enters an area between the two first connecting plates 341 from the outside of the baffle 34 and is mixed with mixed gas again, so that the flow rate of the mixed gas can be effectively reduced, the mixed gas is more stable during combustion, and the utilization rate of fuel gas is higher.
Referring to fig. 3, the present invention further provides a combustion assembly based on the combustion apparatus, including the combustion apparatus according to any of the above embodiments; the gas distribution rod is provided with a plurality of gas distribution cavities, the number of the combustion devices is multiple, the combustion devices are arranged side by side, and the gas inlets of the combustion devices are respectively communicated with the gas distribution cavities. The gas distributing rod 37 can be used for connecting external gas supply equipment, such as a gas valve 17 and the like. It is a plurality of burner connects respectively divide gas pole 37, through divide gas pole 37 to a plurality of burner air feed, and then can pass through divide gas pole 37 control a plurality of burner's air feed volume to realize combustion state's control. The air distribution chamber 38 can be used for receiving fuel gas, and when a plurality of combustion devices are in operation, the combustion devices are received in the air distribution chamber 38 and inject air, so that air flow is rapidly mixed in the air flow channel 33.
Further optionally, a plurality of the combustion devices are arranged at intervals, and an air flow passage is formed between adjacent combustion devices. Air flows from the air channel to the combustion device, and the air is preheated and flows to the combustion device.
Part of the air flow channel can enter the combustion zone 35 through the secondary air ports 36 to improve the combustion efficiency of the combustion device.
When the airflow flows along the adjacent combustion device, the combustion device can be cooled, so that the initial temperature of the gas output from the gas outlet 32 of the combustion device is low, and the combustion device is prevented from backfiring.
Referring to fig. 4, the present invention further provides a burner based on the above combustion apparatus or the above combustion assembly, the burner comprising a first combustion chamber and a second combustion chamber which are communicated with each other, the burner further comprising:
a burner main body 20 in which the first combustion chamber 21 and the second combustion chamber 22 are provided; the burner body 20 is formed with at least two chambers therein, wherein a first combustion chamber 21 is used for preheating combustion and a second combustion chamber 22 is used for high temperature air combustion. The first combustion chamber 21 and the second combustion chamber 22 are communicated with each other, high-temperature flue gas formed by preheating and burning in the first combustion chamber 21 is conveyed to the second combustion chamber 22, and high-temperature air burning is carried out in the second combustion chamber 22, so that fuel gas is fully burnt.
The combustion device according to any one of the embodiments above is disposed in the first combustion chamber, and is configured to receive gas and air, and form a mixed gas to perform preheating combustion in the first combustion chamber 21; the combustion device forms mixed gas and injects the mixed gas into the first combustion chamber 21 for combustion to form high-temperature flue gas. The combustion device is provided with an air inlet 31 and an air outlet 32, wherein the air inlet 31 is used for receiving gas and air, and when the gas flows through the combustion device, the gas and the air are fully mixed and output to the first combustion chamber 21 from the air outlet 32. An ignition device 24 is arranged in the first combustion chamber 21 and is used for igniting the mixed gas so as to perform preheating combustion. The flame formed by the preheating and burning of the combustion device can preheat the air in the first combustion chamber 21 to form mixed high-temperature flue gas.
And the fuel gas injection assembly is provided with a fuel gas inlet and a fuel gas outlet 23 communicated with the second combustion chamber 22 and is used for injecting fuel gas into the second combustion chamber 22 so as to enable the second combustion chamber 22 to carry out high-temperature air combustion reaction. The gas injected by the combustion device is combusted to form high-temperature flue gas, the high-temperature flue gas is conveyed into the second combustion chamber 22, and when the temperature in the second combustion chamber 22 reaches a preset temperature, the gas injection assembly injects gas into the second combustion chamber 22, so that high-temperature air combustion reaction is performed in the second combustion chamber 22. In manufacturing the burner, a temperature sensor 15 may be provided in the second combustion chamber 22 to detect whether the preset temperature is reached in the second combustion chamber 22. The gas injection assembly can be a gas injection pipe communicated with the gas valve 17, and can also be a gas distributor with a plurality of nozzles.
Referring to fig. 4, air a enters the interior of the burner body 20, part of the air a1 enters the combustion device, and part of the air a2 continues to flow toward the first combustion chamber 21. The gas enters the burner main body 20, part of the gas B1 enters the combustion device, is mixed with air A1 to form mixed gas to be injected and combusted to form high-temperature flue gas C, the high-temperature flue gas C is mixed with air A2 to form mixed flue gas to enter the second combustion chamber 22, part of the gas B2 enters the second combustion chamber 22 through the gas injection assembly, is mixed with the high-temperature flue gas C to perform high-temperature air combustion reaction to form high-temperature flue gas E, and the high-temperature flue gas E exchanges heat with the heat exchanger 11 to form low-temperature flue gas F which enters the smoke collecting hood 13 of the water heater and is output by the smoke exhaust pipe 14.
The gas of burner output can burn with the air intensive mixing, helps reducing the nitrogen oxide content in the flue gas. When the flue gas is mixed with the air in the first combustion chamber 21 again, the fuel gas can be further combusted, and the content of nitrogen oxides can be further reduced. After the high-temperature flue gas D enters the second combustion chamber 22, when the temperature in the second combustion chamber 22 reaches a preset temperature, the gas injection assembly injects gas into the second combustion chamber 22, and the second combustion chamber 22 is ignited for high-temperature air combustion.
Because the cooling body 40 carries out local cooling to the flame that the burner burning formed for the local flame that the burner burning formed is eliminated, the nitrogen oxide content that the burner burning formed reduces, and carbon monoxide in the flue gas gets into in the second combustion chamber 22, and under the high temperature air combustion reaction effect, carbon monoxide in the high temperature flue gas fully burns, and when the flue gas was discharged via the second combustion chamber 22, the content of nitrogen oxide and carbon monoxide in the flue gas all reduced.
In order to increase the cooling effect of the cooling body 40 on the flame, optionally, the cooling body 40 is arranged through the outer flame of the flame formed by the combustion device. Because the flame that the burner produced is relatively stable when the burner was operated, the outer flame position of flame is also relatively invariable, the cooling body 40 carries out cooling to the outer flame of the flame that the burner sprays and forms to promote cooling effect. The combustion device can also be provided with a plurality of cooling bodies 40, wherein at least one cooling body 40 is arranged close to the air outlet 32 of the combustion device to cool the air outlet 32 of the combustion device, so as to avoid tempering caused by over-high local temperature of the air outlet 32 of the combustion device; wherein at least one cooling body 40 is arranged away from the gas outlet 32 of the combustion device for locally cooling the outer flame of the combustion device.
When the preparation during the combustor, can be in set up a plurality ofly in the combustion chamber burner to form the homogeneous combustion state in first combustion chamber 21, and then can promote combustion uniformity in the combustion chamber helps improving the combustion efficiency of gas.
The second combustion chamber 22 is used for high-temperature air combustion reaction. During the combustion reaction of the high-temperature air, the chemical reaction needs to occur in a high-temperature low-oxygen environment, the temperature of reactants is higher than the autoignition temperature of the reactants, the maximum temperature rise in the combustion process is lower than the autoignition temperature of the reactants, and the volume fraction of oxygen is diluted to an extremely low concentration by combustion products. In this combustion state, compared to conventional combustion, the pyrolysis of the fuel is suppressed, the flame thickness becomes thicker, and the flame front disappears, so that the temperature is very uniform throughout the second combustion chamber 22, the combustion peak temperature is low and the noise is very small, and the emission of pollutant nitrogen oxides and carbon monoxide is greatly reduced. However, achieving high temperature air combustion requires certain conditions: the oxygen concentration in most areas in the furnace is required to be ensured to be lower than a certain value, generally lower than 5% -10%, the gas is ensured to be fully combusted and uniformly combusted, the temperature is higher than the self-ignition point of the fuel, and the self-ignition is maintained. The preset temperature of the mixed flue gas reaches the autoignition temperature of the fuel gas injected by the fuel gas injection assembly, so that the fuel gas injected by the fuel gas injection assembly can maintain autoignition in the second combustion chamber 22.
Since the air in the first combustion chamber 21 can supplement the combustion of the gas injected by the combustion device, the oxygen concentration in the mixed smoke is relatively low, and the high-temperature air combustion reaction is suitable for the second combustion chamber 22. When the gas that the gas injection subassembly jetted carries out high temperature air combustion, the energy consumption that the burning needs reduces. The fan 16 may be provided outside the burner to supply air into the first combustion chamber 21, or another structure may be provided outside the burner to supply air into the first combustion chamber 21.
The combustion device quickly preheats the air in the first combustion chamber 21 through the first combustion chamber 21, so that the heat load ratio in the first combustion chamber 21 is adjusted to be within the range of 20-50%, and the emission of nitrogen oxides and carbon monoxide in the mixed flue gas formed by the first combustion chamber 21 is controlled to be about 10 ppm. Because the high-temperature air combustion is volume combustion or dispersion combustion, the reaction rate is low, the local heat release is less, the heat flow distribution is uniform, the combustion peak temperature is low, and the noise is extremely low.
In the combustion process of the combustion apparatus, the flame is cooled by the cooling body 40, so that nitrogen oxides generated by combustion are reduced, and the generated carbon monoxide can be sufficiently combusted along with the combustion reaction of high-temperature air in the second combustion chamber 22, so as to improve the combustion efficiency of the gas in the second combustion chamber 22 and increase the heat release of the gas in the second combustion chamber 22. Compared with the traditional local high-temperature combustion in a small area, the high-temperature air combustion of the 16L gas water heater with the combustor of the embodiment has the advantages that the reaction is carried out in a large area or even in the whole second combustion chamber 22, and the flame front surface in the second combustion chamber 22 disappears; the generation of pollutants such as nitrogen oxides, carbon monoxide and the like is obviously reduced; the overall temperature of the second combustion chamber 22 is increased and the radiant heat transfer is enhanced. The second combustion chamber 22 is internally combusted to form high-temperature flue gas, and the combustion heat load of the second combustion chamber 22 accounts for 50% -80%. The heat load ratio of the second combustion chamber 22 is controlled in the range, soft combustion is achieved in the second combustion chamber 22, the purpose of low-noise combustion is achieved, and therefore combustion noise of the gas water heater can be reduced.
The utility model also provides an embodiment of the water heater.
The water heater includes: a body 10; the burner according to any one of the above embodiments, provided in the machine body 10; and the heat exchanger 11 is arranged on the machine body 10 and exchanges heat with the combustor.
The machine body 10 forms an integral framework of the water heater, the machine body 10 can further comprise other functional components, such as a smoke collecting hood 13, low-temperature smoke after heat exchange of the heat exchanger 11 enters the smoke collecting hood 13, and is output to the outside through a smoke exhaust pipe 14 communicated with the smoke collecting hood 13.
The heat exchanger 11 is communicated with a second combustion chamber 22 of the burner, and high-temperature flue gas produced from the second combustion chamber 22 enters the heat exchanger 11 and exchanges heat with a pipeline inside the heat exchanger 11, so that water of the water heater is heated. And low-temperature flue gas generated by heat exchange is discharged outdoors.
Because the burner of combustor carries out local cooling to flame for the nitrogen oxide content that the burning produced reduces, and the carbon monoxide content that the burning produced increases, and the flue gas gets into carry out high temperature air combustion reaction in the second combustion chamber 22, carbon monoxide mixes the reburning with the gas that the gas injection subassembly sprays for the combustion efficiency of gas promotes greatly, further can reduce harmful gas content in the high temperature flue gas that the second combustion chamber 22 produced makes harmful gas in the gas that the water heater discharged significantly reduces, and the energy utilization of gas promotes, and the heating efficiency of water heater improves.
Further optionally, the water heater further comprises: a temperature sensor 15 for detecting the temperature inside the second combustion chamber 22; and a controller electrically connected with the temperature sensor 15 and used for acquiring the temperature in the second combustion chamber 22 and the heat load required by the water heater; and when the temperature in the second combustion chamber 22 reaches a preset temperature, controlling the gas injection assembly to inject gas into the second combustion chamber 22, so that the second combustion chamber 22 is subjected to high-temperature air combustion, and the range of the heat load required by the water heater is reached. The temperature sensor 15 is used to detect whether a trigger condition for high-temperature air combustion is reached in the second combustion chamber 22.
When the triggering condition of the combustion reaction of the high-temperature air is reached in the second combustion chamber 22, the controller controls the gas injection assembly to inject the gas into the second combustion chamber 22, so that the combustion reaction of the high-temperature air is carried out in the second combustion chamber 22, and the accurate control of the combustion state of the water heater is further realized.
Claims (12)
1. A combustion apparatus, comprising:
the gas-fired burner comprises a burner body, a burner body and a burner, wherein the burner body is provided with a gas flow channel, a gas inlet and a gas outlet which are respectively communicated with the gas flow channel, the gas inlet is used for accessing air and fuel gas, and the gas outlet is used for outputting mixed gas;
the number of the baffles is two, the two baffles are arranged on the combustion device main body at intervals, and a combustion area for combusting the mixed gas output by the gas outlet is formed between the two baffles; and
and the cooling body is arranged on the combustion device main body and used for cooling the flame generated by the combustion area.
2. The combustion device as claimed in claim 1, wherein said cooling body is disposed through said baffle.
3. A combustion unit according to claim 2, wherein said cooling body is provided on a side of said combustion zone remote from said outlet port.
4. The combustion apparatus as claimed in claim 1, wherein said baffle is provided with secondary air ports formed through said baffle and communicating with said combustion zone.
5. The combustion apparatus as claimed in claim 1, wherein said secondary air port is disposed adjacent said air outlet.
6. The combustion apparatus as claimed in claim 1, wherein said combustion apparatus body is an atmospheric burner.
7. The combustion apparatus as claimed in any one of claims 1 to 6, wherein said baffle comprises:
the first connecting plate is provided with a first side edge and a second side edge which are arranged in a back-to-back mode, and the first side edge of the first connecting plate is connected with the combustion device main body; and
the second connecting plate, the second connecting plate has third side and fourth side that sets up back to the back, the second side of first connecting plate with the third side of second connecting plate is connected, the fourth side of second connecting plate extends to the direction of keeping away from the burner main part, certainly the burner main part to the fourth side direction of second connecting plate, two the region that forms between the first connecting plate of baffle is the setting that gradually expands.
8. A combustion assembly, comprising:
a combustion apparatus as claimed in any one of claims 1 to 7; and
the gas distribution rod is provided with a gas distribution cavity, the number of the combustion devices is multiple, the combustion devices are arranged side by side, and the gas inlets of the combustion devices are respectively communicated with the gas distribution cavity.
9. The combustion assembly of claim 8, wherein a plurality of said combustion devices are spaced apart, with an air flow passage being defined between adjacent ones of said combustion devices.
10. A burner comprising a first combustion chamber and a second combustion chamber in communication with each other, characterized in that said burner further comprises:
the first combustion chamber and the second combustion chamber are arranged on the burner main body;
the combustion device as claimed in any one of claims 1 to 7, which is arranged in the first combustion chamber and is used for introducing gas and air and forming mixed gas to perform preheating combustion in the first combustion chamber; and
and the fuel gas injection assembly is provided with a fuel gas inlet and a fuel gas outlet communicated with the second combustion chamber and is used for injecting fuel gas into the second combustion chamber so as to enable the second combustion chamber to carry out high-temperature air combustion reaction.
11. A water heater, comprising:
a body;
the burner of claim 10, disposed in the housing; and
and the heat exchanger is arranged on the machine body and exchanges heat with the combustor.
12. The water heater as recited in claim 11, further comprising:
a temperature sensor for detecting a temperature within the second combustion chamber; and
the controller is electrically connected with the temperature sensor and is used for acquiring the temperature in the second combustion chamber and the heat load required by the water heater; and the gas injection assembly is also used for controlling the gas injection assembly to inject gas into the second combustion chamber when the temperature in the second combustion chamber reaches a preset temperature, so that the second combustion chamber is subjected to high-temperature air combustion, and the heat load range required by the water heater is reached.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120688414.3U CN215808461U (en) | 2021-04-02 | 2021-04-02 | Burner, combustion assembly, combustor and water heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120688414.3U CN215808461U (en) | 2021-04-02 | 2021-04-02 | Burner, combustion assembly, combustor and water heater |
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| Publication Number | Publication Date |
|---|---|
| CN215808461U true CN215808461U (en) | 2022-02-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120688414.3U Active CN215808461U (en) | 2021-04-02 | 2021-04-02 | Burner, combustion assembly, combustor and water heater |
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| Country | Link |
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| CN (1) | CN215808461U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116336469A (en) * | 2023-05-24 | 2023-06-27 | 杭州老板电器股份有限公司 | Flow path system, combustion heat exchange assembly and gas water heater |
-
2021
- 2021-04-02 CN CN202120688414.3U patent/CN215808461U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116336469A (en) * | 2023-05-24 | 2023-06-27 | 杭州老板电器股份有限公司 | Flow path system, combustion heat exchange assembly and gas water heater |
| CN116336469B (en) * | 2023-05-24 | 2023-08-18 | 杭州老板电器股份有限公司 | Flow path system, combustion heat exchange assembly and gas water heater |
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