CN213480215U - Fully premixed ultralow nitrogen water-cooling gas vacuum hot water boiler - Google Patents
Fully premixed ultralow nitrogen water-cooling gas vacuum hot water boiler Download PDFInfo
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- CN213480215U CN213480215U CN202021925284.2U CN202021925284U CN213480215U CN 213480215 U CN213480215 U CN 213480215U CN 202021925284 U CN202021925284 U CN 202021925284U CN 213480215 U CN213480215 U CN 213480215U
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- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/30—Technologies for a more efficient combustion or heat usage
Abstract
The embodiment of the disclosure discloses full premix ultralow nitrogen water-cooling gas vacuum hot water boiler includes: the boiler comprises a boiler box body, a lower collecting box, an upper collecting box and a heat exchanger; a plurality of hollow furnace bodies, anti-backfire pieces and ignition devices are arranged in the boiler box body; one end of each hollow furnace body is communicated with the top of the lower header, and the other end of each hollow furnace body is communicated with the bottom of the upper header; the hollow furnace bodies are arranged at intervals to form a plurality of rows, and the anti-backfire part is arranged at the position of the gap between every two hollow furnace bodies in the first row; combustible gas is ignited by the ignition device in the boiler box body after passing through the anti-backfire piece to form a plurality of flame bundles, and each flame bundle is used for heating the heat medium water in the two adjacent rows of the hollow furnace bodies. According to the embodiment of the disclosure, the problems of easy blockage, deflagration, tempering and the like are solved, the maintenance cost is low, the temperature of the flame front adopts a water cooling mode, the aim of ultralow NOx emission is achieved, no condensed water is generated in the boiler, and the service life of the boiler is prolonged.
Description
Technical Field
The utility model relates to the technical field of boilers, in particular to a fully premixed ultra-low nitrogen water-cooling gas vacuum hot water boiler.
Background
Nitrogen in the air reacts with oxygen at high temperature to generate nitrogen oxides, and when the temperature is lower than 1500 ℃, the generation amount of the nitrogen oxides is small. When natural gas is combusted in a boiler furnace, as the local combustion temperature of the furnace can exceed 1500 ℃, nitrogen oxides are generated in large quantities at the local high temperature points, and low nitrogen emission is difficult to realize.
At present, various combustion optimization control technologies are mainly adopted in boiler low-nitrogen emission measures, and the combustion temperature is reduced, so that the emission of NOx is reduced. The method mainly comprises the following steps:
the full premix burner fpb (fuel Premixed burner) is mostly a metal fiber surface combustion mode, and the burner of this type has the advantages of high combustion heat intensity and uniform temperature. However, in an environment with low air cleanliness, the metal fiber net is easy to block, explode, temper, and have unstable combustion and high maintenance cost. And NOx emissions are high with low oxygen content.
The low-nitrogen diffusion type burner is combined with a Flue Gas return pipe FGR (also called Flue Gas Recirculation), the Flue Gas in the hearth is subjected to secondary combustion, although the combustion mode is stable,the technology is mature, but the combustion is incomplete, the NOx is higher and unstable, and the return smoke contains H2And O, condensed water can be generated in the hearth, so that the furnace body is corroded, and the service life of the boiler is influenced.
The atmospheric combustion mode has the advantages of stable flame and low gas flow pressure, but the ultra-low NOx emission is difficult to achieve.
SUMMERY OF THE UTILITY MODEL
In order to solve the problems in the related art, the embodiments of the present disclosure provide a fully premixed ultra-low nitrogen water-cooled gas-fired vacuum hot water boiler.
The embodiment of the disclosure provides a fully premixed ultralow nitrogen water-cooling gas vacuum hot water boiler.
Specifically, the fully premixed ultra-low nitrogen water-cooled gas-fired vacuum hot water boiler comprises: the boiler comprises a boiler box body, a lower collecting box positioned at the bottom of the boiler box body, an upper collecting box positioned at the top of the boiler box body and a heat exchanger arranged in the upper collecting box;
a plurality of hollow furnace bodies, anti-backfire pieces and ignition devices are arranged in the boiler box body; one end of each hollow furnace body is communicated with the top of the lower header, and the other end of each hollow furnace body is communicated with the bottom of the upper header; the lower header, the hollow furnace body and the upper header are filled with heating medium water, and a gap is reserved between the heating medium water in the upper header and the heat exchanger;
the hollow furnace bodies are arranged at intervals to form a plurality of rows, and the anti-backfire part is arranged at the position of the gap between every two hollow furnace bodies in the first row; combustible gas is ignited by the ignition device in the boiler box body after passing through the anti-backfire piece to form a plurality of flame bundles, and each flame bundle is used for heating the heat medium water in the two adjacent rows of the hollow furnace bodies.
Optionally, each anti-backfire element is provided with a plurality of meshes; or after each anti-backfire element is extruded to form a corrugated through hole, the anti-backfire elements are fixed at the gap positions.
Optionally, the meshes or corrugated through holes are uniformly arranged on the anti-backfire member.
Optionally, the mesh or corrugated through holes have a pore diameter of less than 1 mm.
Optionally, the spacing between different rows of the hollow furnace bodies is 20-110 mm.
Optionally, the boiler further comprises: the device comprises a mixing cavity, an equal-pressure cavity, a fuel gas supply assembly and an air supply assembly;
optionally, a combustion chamber is arranged inside the boiler box body and is positioned behind the second row of the hollow furnace body.
The mixing cavity is communicated with the constant-pressure cavity, and the constant-pressure cavity is communicated with the boiler box body;
the gas supply assembly includes: the gas-fired control system comprises a filter, a pressure reducing valve, a pressure gauge, an electromagnetic valve, a gas pipeline and a gas servo motor which are connected in sequence; the gas servo motor is arranged at the position of an inlet of the mixing cavity communicated with the gas pipeline;
the air supply assembly includes: the air servo motor, the fan and the air pipeline are connected in sequence; the air pipeline is communicated with the mixing cavity.
Optionally, the boiler further comprises: and the Venturi device is arranged in the air pipeline and is positioned at the inlet position of the air pipeline communicated with the gas pipeline.
Optionally, the boiler further comprises: the isobaric plate is arranged in the isobaric cavity and is positioned at the position where the isobaric cavity is communicated with the inlet of the boiler box body; wherein, a plurality of through holes are arranged on the equal-pressure plates.
Optionally, the boiler box body is further provided with a smoke exhaust port opposite to the inlet of the mixing cavity.
Optionally, the boiler further comprises: and the controller is electrically connected with the gas supply assembly and the air supply assembly and is used for controlling the mixing ratio of the gas and the air.
The technical scheme provided by the embodiment of the disclosure has at least the following beneficial effects:
(1) the fully premixed ultra-low nitrogen water-cooled gas vacuum hot water boiler provided by the embodiment of the disclosure uses the first row of hollow furnace bodies and the anti-backfire piece as the combustion heads of the burners, and the first row of hollow furnace bodies contain the heat medium water, so that the temperature of the flame bundle is reduced to below 1500 ℃ after the heat exchange is carried out with the heat medium water of the first row of hollow furnace bodies, and the generation of nitrogen oxides is greatly reduced.
(2) The fully premixed ultra-low nitrogen water-cooled gas vacuum hot water boiler provided by the embodiment of the disclosure is provided with a plurality of rows of hollow furnace bodies, and the temperature of the flame bundle is reduced by 150-200 ℃ when the flame bundle passes through one row of hollow furnace bodies, so that the generation of nitrogen oxides is further reduced.
(3) The fully-premixed ultralow-nitrogen water-cooled gas vacuum hot water boiler provided by the embodiment of the disclosure utilizes the first row of hollow furnace bodies to clamp the anti-backfire member, and the anti-backfire member is provided with meshes or is processed into a corrugated through hole structure, so that a plurality of flame beams penetrating through the meshes or the corrugated through holes can be formed between two adjacent rows of hollow furnace bodies, thereby better heating hot medium water and improving heating efficiency.
(4) The fully premixed ultra-low nitrogen water-cooled gas vacuum hot water boiler provided by the embodiment of the disclosure utilizes the Venturi device to realize that gas and air are uniformly mixed and enter the mixing cavity, and further uniformly penetrates through the anti-backfire piece at the gap of the first hollow furnace body through the through hole of the equal-pressure plate to enter the interior of the boiler body, so that the purpose of fully premixing the gas is achieved, and the combustion efficiency of the gas is improved by fully mixed gas.
(5) The fully premixed ultra-low nitrogen water-cooled gas vacuum hot water boiler provided by the embodiment of the disclosure has the advantages that the flame temperature is balanced, the problems of easy blockage, deflagration and tempering are solved, the maintenance cost is low, the flame frontal surface temperature adopts a water cooling mode, the ultra-low NOx emission purpose is achieved, no condensed water is generated in the boiler, and the service life of the boiler is prolonged.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.
Drawings
Other features, objects, and advantages of the present disclosure will become more apparent from the following detailed description of non-limiting embodiments when taken in conjunction with the accompanying drawings. In the drawings:
FIG. 1 shows a front view of a fully premixed ultra-low nitrogen water-cooled gas-fired vacuum hot water boiler according to an embodiment of the present disclosure;
FIG. 2 shows a side view of a fully premixed ultra low nitrogen water cooled gas fired vacuum hot water boiler according to an embodiment of the present disclosure;
FIG. 3 shows a schematic position diagram of the first row of hollow furnace bodies and the anti-backfire elements according to an embodiment of the present disclosure;
FIG. 4 illustrates a schematic diagram of temperature variation of a flame bundle according to an embodiment of the disclosure.
Detailed Description
Hereinafter, exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily implement them. Also, for the sake of clarity, parts not relevant to the description of the exemplary embodiments are omitted in the drawings.
In the present disclosure, it is to be understood that terms such as "including" or "having," etc., are intended to indicate the presence of the disclosed features, numbers, steps, behaviors, components, parts, or combinations thereof, and are not intended to preclude the possibility that one or more other features, numbers, steps, behaviors, components, parts, or combinations thereof may be present or added.
It should be further noted that the embodiments and features of the embodiments in the present disclosure may be combined with each other without conflict. The present disclosure will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
FIG. 1 shows a front view of a fully premixed ultra low nitrogen water cooled gas fired vacuum hot water boiler according to an embodiment of the present disclosure. FIG. 2 shows a side view of a fully premixed ultra low nitrogen water cooled gas fired vacuum hot water boiler according to an embodiment of the present disclosure. As shown in fig. 1 and 2, the fully premixed ultra-low nitrogen water-cooled gas-fired vacuum hot water boiler includes: the boiler comprises a boiler box body 10, a lower header 20 positioned at the bottom of the boiler box body 10, an upper header 30 positioned at the top of the boiler box body 10, and a heat exchanger 40 arranged in the upper header 30;
a plurality of hollow furnace bodies 11, anti-backfire pieces 12 and ignition devices 13 are arranged in the boiler box body 10; one end of each of the hollow furnace bodies 11 is communicated with the top of the lower header 20, and the other end is communicated with the bottom of the upper header 30; the lower header 20, the hollow furnace body 11 and the upper header 30 are filled with heat medium water, and a gap is formed between the heat medium water in the upper header 30 and the heat exchanger 40;
the plurality of hollow furnace bodies 11 are arranged at intervals to form a plurality of rows, and the anti-backfire part 12 is arranged at the gap position of every two hollow furnace bodies 11 at the first row; combustible gas is ignited by the ignition device 13 in the boiler box body 10 after passing through the anti-backfire piece 12, so that a plurality of flame bundles are formed, and each flame bundle is used for heating the heating medium water in the two adjacent rows of the hollow furnace bodies 11.
According to the embodiment of the present disclosure, the hollow furnace body 11 located at the first row may adopt rectangular square steel, so as to weld the anti-backfire member 12 at the gap position of the hollow furnace body 11. The hollow furnace bodies 11 in other rows can adopt cylindrical steel pipes, so that the contact area between the flame beams and the hollow furnace bodies 11 can be increased, the heating medium water can be heated better, and the heating efficiency is improved.
According to the embodiment of the disclosure, fig. 3 shows a position schematic diagram of the first row of hollow furnace bodies and the anti-backfire members according to the embodiment of the disclosure, and as shown in fig. 3, each anti-backfire member 12 is fixed at a gap position of the hollow furnace body 11 after being pressed to form a corrugated through hole. The anti-backfire element 12 is positioned at the inlet of the combustible gas entering the boiler box body 10, and the air pressure at one side of the combustible gas is larger than the air pressure inside the boiler box body 10, so that the ignited combustible gas can be prevented from backfiring, and the use safety of the boiler is ensured.
In the mode of the present disclosure, the first row hollow furnace body 11 and the anti-backfire member 12 constitute a combustion head similar to a burner, and different from the split arrangement of the burner and the boiler body in the prior art, the first row hollow furnace body 11 is located inside the boiler box body 10, and is used as a part of the boiler body, which is equivalent to the arrangement of the combustion head of the burner inside the boiler box body 10, so that the volume of the boiler is saved, and the cost is reduced; on the other hand, the anti-backfire part 12 is arranged at the gap position of the hollow furnace body 11, and the anti-backfire part 12 is provided with the corrugated through hole, so that combustible gas can pass through, and further the combustible gas is ignited inside the boiler box body to form a flame beam, thereby heating the heat medium water inside the hollow furnace body 11 better, reducing the temperature of the combustible gas below 1500 ℃, and greatly reducing the generation of nitrogen oxides.
It is understood that, as another embodiment, a plurality of meshes may be disposed on each of the anti-backfire members 12, so that the combustible gas can enter the interior of the boiler tank 10 through the meshes, which is not limited by the present disclosure.
According to the embodiment of the disclosure, the meshes or the corrugated through holes are uniformly distributed on the anti-backfire member 12, and the number of flame bundles between two adjacent rows of hollow furnace bodies 11 and the position of the heating hollow furnace bodies 11 can be controlled by controlling the size and the distribution position of the meshes or the corrugated through holes, so that the heat medium water in the hollow furnace bodies can be better heated, and the heating efficiency is improved.
According to an embodiment of the present disclosure, the mesh or corrugated through-hole has a hole diameter of less than 1 mm.
According to the embodiment of the disclosure, the interval between the different rows of the hollow furnace bodies 11 is 20-110 mm.
According to the embodiment of the present disclosure, a combustion chamber is arranged inside the boiler box 10 and is located behind the second row of the hollow furnace 11. The combustion chamber may be a space formed by removing several rows of hollow furnace bodies 11, the flame beam formed by the combustible gas passes through the first row and the second row of hollow furnace bodies 11 and then reaches the combustion chamber, and does not extend continuously, the flame beam is used for directly heating the heat medium water in the first row and the second row of hollow furnace bodies 11, and the waste heat generated by the combustion of the combustible gas is used for heating the heat medium water in the hollow furnace bodies 11 after the combustion chamber. According to the volume of the boiler box body 10, 10-40 rows of hollow furnace bodies 11 can be arranged, and the hollow furnace bodies 11 in other rows except the first two rows can be preheated and heated by using combustible gas, so that the utilization efficiency of heat is improved. It should be noted that, the number of the rows of the hollow furnace bodies is not limited by the disclosure, and the number can be flexibly adjusted according to the requirement of the tonnage of the boiler.
In this disclosed manner, fig. 4 shows a schematic diagram of the temperature variation of a flame bundle according to an embodiment of the disclosure. As shown in FIG. 4, the abscissa in the figure represents the number of rows of flame beams sequentially passing through the first row, the second row and the tail row of hollow furnace bodies, and the ordinate represents the flame temperature value, which can be collected by the laser temperature measuring device. The figure shows that the temperature of the flame beam is reduced by about 150 ℃ every time the flame beam passes through a row of hollow furnace bodies, thereby further reducing the generation of nitrogen oxides.
It should be noted that the temperature reduction range of the flame bundle passing through a row of hollow furnace bodies can be adjusted by adjusting the intervals of different rows of hollow furnace bodies, and the temperature reduction range is controlled to be between 150-.
According to the embodiment of the present disclosure, the interior of the upper box 30 is a vacuum environment, the heat medium water is heated to form high-temperature steam and the heat exchanger 40 performs heat exchange, and the high-temperature steam forms condensed water after heat exchange and then falls back into the upper box, so that the total amount of the heat medium water of the lower box 20, the hollow furnace body 11 and the upper box 30 is ensured to a certain extent, the hollow furnace body 11 is prevented from being heated by flame beams under the condition of lack of the heat medium water, and the danger caused by air-firing accidents is avoided. It should be noted that the hot water boiler that this disclosure provided still disposes alarm device to report to the police when hot media water is less than predetermined water level, remind operating personnel in time to increase hot media water.
According to an embodiment of the present disclosure, the hot water boiler further includes: a mixing chamber 50, an equal pressure chamber 60, a gas supply assembly and an air supply assembly; the mixing cavity 50 is communicated with the constant pressure cavity 60, and the constant pressure cavity 60 is communicated with the boiler box body 10; the gas supply assembly includes: a filter 71, a pressure reducing valve 72, a pressure gauge 73, an electromagnetic valve 74, a gas pipeline 75 and a gas servo motor 76 which are connected in sequence; the gas servo motor 76 is arranged at the inlet position of the mixing cavity connecting pipe 50 communicated with the gas pipeline 75; the air supply assembly includes: an air servo motor 81, a fan 82 and an air pipeline 83 which are connected in sequence; the air duct 83 communicates with the mixing chamber 50.
In the present disclosure, the fuel gas sequentially passes through the filter 71, the pressure reducing valve 72, the pressure gauge 73, the solenoid valve 74, and the fuel gas pipe 75 to enter the mixing chamber 50; air enters the mixing chamber 50 through the fan 82 and the air pipeline 83 in sequence; the fuel gas and the air are mixed in a certain proportion in the mixing cavity 50 to form combustible gas, then the combustible gas enters the constant pressure cavity 60, and then passes through the anti-backfire piece 12 arranged at the gap position of the hollow furnace body 11 and enters the boiler box body 10 for combustion.
In an aspect of the present disclosure, the hot water boiler further includes: and the controller (not shown in the figure) is electrically connected with the gas supply assembly and the air supply assembly and is used for controlling the mixing ratio of the gas and the air.
The mixing ratio of the gas and the air can be adjusted by the controller, and the mixing ratio can ensure that the combustible gas can be stably combusted within the range of 20-100 percent so as to adapt to different heat supply scenes, such as central air-conditioning heating, radiator heating or domestic hot water and the like.
According to an embodiment of the present disclosure, the vacuum hot water boiler further includes: and the Venturi device 51 is arranged in the air pipeline 83 and is positioned at the inlet position of the air pipeline 83 communicated with the gas pipeline 75.
In the mode of this disclosure, gas and air get into the venturi device with 90 jiaos of cuts, later utilize venturi device 51 can inject gas and air to mixing chamber 50 high-speed rotatory mixing, gas and air carry out abundant mixing at mixing chamber 50 and form the combustible gas.
According to an embodiment of the present disclosure, the vacuum hot water boiler further includes: the isostatic pressing plate 61 is arranged in the isostatic pressing cavity 60 and is positioned at the position where the isostatic pressing cavity 60 is communicated with the inlet of the boiler box body 10; wherein, a plurality of through holes are arranged on the equal pressure plate 61.
In the present disclosure, after entering the constant pressure chamber 60 from the mixing chamber 50, the combustible gas passes through the through hole formed in the constant pressure plate 61, and then enters the interior of the boiler box 10 through the anti-backfire member 12 at the gap position of the hollow furnace body 11 for combustion. The through holes on the equal-pressure plate 61 play a role in enabling combustible gas to uniformly pass through the meshes or the corrugated through holes of the anti-backfire piece 12, so that the purpose of full premixing is achieved before the combustible gas is combusted, and the combustion efficiency is improved.
According to the embodiment of the present disclosure, the boiler box 10 is further provided with a smoke exhaust 14 opposite to the entrance position of the mixing chamber 50.
The fully premixed ultralow nitrogen water-cooled gas vacuum hot water boiler provided by the embodiment of the disclosure comprises a lower box body, a hollow furnace body and an upper box body, wherein hot medium water is added into the lower box body, the water level of the hot medium water in the upper box body is lower than the height of a heat exchanger, then a water inlet and outlet pipeline of the heat exchanger is communicated with an external equipment pipeline which needs heating and domestic hot water, a controller is used for controlling a gas supply assembly and an air supply assembly to respectively provide gas and air in a certain proportion, the gas and the air are injected into a mixing cavity by a Venturi device and mixed to form combustible gas, the combustible gas is sprayed on an anti-tempering piece at the gap of a first row of the hollow furnace body through a through hole on an equal pressure plate of an equal pressure cavity, the combustible gas enters the interior of the boiler body from meshes or corrugated through holes on the anti-tempering piece, and then the combustible. The heat medium water in the upper box body is heated to be changed into steam to exchange heat with the heat exchanger, so that heat is transferred to an external equipment pipeline needing heating and living hot water, and the external heating or the living hot water is completed.
The fully premixed ultra-low nitrogen water-cooled gas vacuum hot water boiler provided by the embodiment of the disclosure has the advantages that the flame temperature is balanced, the problems of easy blockage, deflagration and tempering are solved, the maintenance cost is low, the flame frontal surface temperature adopts a water cooling mode, the ultra-low NOx emission purpose is achieved, no condensed water is generated in the boiler, and the service life of the boiler is prolonged.
The foregoing description is only exemplary of the preferred embodiments of the disclosure and is illustrative of the principles of the technology employed. It will be understood by those skilled in the art that the scope of the present invention is not limited to the specific combination of the above-mentioned features, but also covers other embodiments formed by any combination of the above-mentioned features or their equivalents without departing from the spirit of the present invention. For example, the above features and (but not limited to) the features disclosed in this disclosure having similar functions are replaced with each other to form the technical solution.
Claims (10)
1. The utility model provides a full premix ultralow nitrogen water-cooling gas vacuum hot water boiler which characterized in that includes: the boiler comprises a boiler box body, a lower collecting box positioned at the bottom of the boiler box body, an upper collecting box positioned at the top of the boiler box body and a heat exchanger arranged in the upper collecting box;
a plurality of hollow furnace bodies, anti-backfire pieces and ignition devices are arranged in the boiler box body; one end of each hollow furnace body is communicated with the top of the lower header, and the other end of each hollow furnace body is communicated with the bottom of the upper header; the lower header, the hollow furnace body and the upper header are filled with heating medium water, and a gap is reserved between the heating medium water in the upper header and the heat exchanger;
the hollow furnace bodies are arranged at intervals to form a plurality of rows, and the anti-backfire part is arranged at the position of the gap between every two hollow furnace bodies in the first row; combustible gas is ignited by the ignition device in the boiler box body after passing through the anti-backfire piece to form a plurality of flame bundles, and each flame bundle is used for heating the heat medium water in the two adjacent rows of the hollow furnace bodies.
2. The boiler according to claim 1, wherein each of the tempering preventing members is provided with a plurality of meshes; or after each anti-backfire element is extruded to form a corrugated through hole, the anti-backfire elements are fixed at the gap positions.
3. The boiler according to claim 2, wherein the mesh or corrugated through holes are uniformly arranged on the anti-backfire member.
4. A boiler according to any of claims 1-3, characterized in that the spacing of the hollow bodies of different rows is 20-110 mm.
5. The boiler according to claim 4, wherein a combustion chamber is provided inside the boiler casing behind the second row of hollow bodies.
6. The boiler according to any of claims 1-3, further comprising: the device comprises a mixing cavity, an equal-pressure cavity, a fuel gas supply assembly and an air supply assembly;
the mixing cavity is communicated with the constant-pressure cavity, and the constant-pressure cavity is communicated with the boiler box body;
the gas supply assembly includes: the gas-fired control system comprises a filter, a pressure reducing valve, a pressure gauge, an electromagnetic valve, a gas pipeline and a gas servo motor which are connected in sequence; the gas servo motor is arranged at the position of an inlet of the mixing cavity communicated with the gas pipeline;
the air supply assembly includes: the air servo motor, the fan and the air pipeline are connected in sequence; the air pipeline is communicated with the mixing cavity.
7. The boiler according to claim 6, further comprising:
and the Venturi device is arranged in the air pipeline and is positioned at the inlet position of the air pipeline communicated with the gas pipeline.
8. The boiler according to claim 7, further comprising:
the isobaric plate is arranged in the isobaric cavity and is positioned at the position where the isobaric cavity is communicated with the inlet of the boiler box body; wherein, a plurality of through holes are arranged on the equal-pressure plates.
9. The boiler according to claim 6, wherein the boiler box is further provided with a smoke outlet located opposite to the inlet of the mixing chamber.
10. The boiler according to claim 6, further comprising:
and the controller is electrically connected with the gas supply assembly and the air supply assembly and is used for controlling the mixing ratio of the gas and the air.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US20230349591A1 (en) * | 2022-04-29 | 2023-11-02 | Xi'an Jiaotong University | Premixed low-nitrogen gas boiler |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20230349591A1 (en) * | 2022-04-29 | 2023-11-02 | Xi'an Jiaotong University | Premixed low-nitrogen gas boiler |
| US11859867B2 (en) * | 2022-04-29 | 2024-01-02 | Xi'an Jiaotong University | Premixed low-nitrogen gas boiler |
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