Gas-fired boiler

Abstract

According to the technical scheme, the gas-fired boiler is characterized in that the gas-fired boiler comprises a boiler body, the boiler body is arranged to be in a circular tube shape with the horizontal axis, and the two ends of the boiler body are closed; the combustion chamber is arranged at one end of the furnace body; the flue is arranged on the side, close to the other end of the furnace body, of the combustion chamber, and the flue is an annular channel; the smoke exhaust pipe is connected to the end, away from the combustion chamber, of the flue, and the smoke exhaust pipe is provided with an auxiliary part; the chimney is connected to one end, far away from the flue, of the auxiliary part; the water inlet tank is arranged on the outer side of the end, away from the combustion chamber, of the furnace body, and the auxiliary part is arranged in the water inlet tank; the preheating chamber is arranged on the inner side of the circular ring of the flue and is a circular pipe coaxial with the flue; and a heating chamber; and through the arrangement of the flue, the preheating chamber, the auxiliary part and the water inlet tank, heat of high-temperature flue gas generated by combustion can be fully utilized, and the utilization rate of the heat is increased.

Description

Technical Field

[0001] The present invention relates to a boiler, and more specifically, to a gas boiler. Background Art

[0002] With the continuous growth of global energy consumption and the increasing emphasis on environmental protection, gas boilers, as a clean and efficient heating equipment, have been widely used in industrial and civil fields. However, traditional gas boilers have certain limitations in terms of energy utilization efficiency and environmental protection performance.

[0003] In the combustion process of traditional gas boilers, there is a problem of incomplete fuel combustion, and a large amount of high-temperature flue gas generated during the operation of the boiler is mostly directly discharged into the atmosphere, resulting in heat loss. Summary of the Invention

[0004] Aiming at the deficiencies of the existing technology, the purpose of the present invention is to provide a gas boiler, which can make full use of the heat of the high-temperature flue gas generated by combustion through the settings of a flue, a preheating chamber, an auxiliary part and a water inlet tank, and improve the utilization rate of heat.

[0005] To achieve the above purpose, the present invention provides the following technical solutions: A gas boiler includes a furnace body, the furnace body is set as a circular tube with a horizontal axis and both ends are closed; A combustion chamber, the combustion chamber is arranged at one end of the furnace body; A flue, the flue is arranged on one side of the combustion chamber close to the other end of the furnace body, and the flue is set as an annular channel; An exhaust pipe, the exhaust pipe is connected to the end of the flue far from the combustion chamber, and the exhaust pipe is provided with an auxiliary part, and the auxiliary part is arranged at a position far from the flue of the exhaust pipe; A chimney, the chimney is connected to the end of the auxiliary part far from the flue; A water inlet tank, the water inlet tank is arranged outside the end of the furnace body far from the combustion chamber, and the auxiliary part is arranged in the water inlet tank; A preheating chamber, the preheating chamber is arranged inside the ring of the flue and is set as a circular tube coaxial with the flue; And a heating chamber, the heating chamber is arranged inside the furnace body and on top of the combustion chamber.

[0006] The present invention is further set as: The combustion chamber is set as a semi-circular ring and the semi-circular ring of the combustion chamber is open upward; The gas boiler further includes a gas supply unit, there are several groups of the gas supply units, the multiple groups of gas supply units are arranged along the axis direction of the combustion chamber, and the multiple gas supply units in the same group are arranged around the axis of the combustion chamber.

[0007] The present invention is further configured such that: the air supply unit includes an air supply pipe, and there are two air supply pipes, and the two air supply pipes are respectively used for conveying fuel gas and air; a gas mixer, which is used for mixing the fuel gas and air conveyed by the two air supply pipes according to a preset ratio; and a combustion pipe, which is used for conveying the mixed gas after mixing to the combustion chamber for combustion.

[0008] The present invention is further configured such that: the heating chamber includes an annular cavity, and the annular cavity is arranged on the annular inner side of the combustion chamber; and a circular cavity, and the circular cavity is arranged inside the annular cavity. The circular cavity, the annular cavity and the combustion chamber are coaxial, and the circular cavity is communicated with the annular cavity through a plurality of communication holes arranged around the axis of the circular cavity.

[0009] The present invention is further configured such that: a rotating shaft coaxial with the heating chamber is arranged inside the heating chamber, and the rotating shaft is rotatably connected to the heating chamber; A plurality of mixing plates located inside the circular cavity are fixedly connected to the outer side of the rotating shaft, and the plurality of mixing plates are evenly arranged around the rotating shaft.

[0010] The present invention is further configured such that: it further includes a water supply pipe, and the water supply pipe is fixedly connected to one end of the heating chamber far from the flue and the water supply pipe is communicated with the annular cavity.

[0011] The present invention is further configured such that: it further includes a fixed shaft, and the fixed shaft is arranged inside the preheating chamber and is coaxially arranged with the preheating chamber; and a spiral plate, and the spiral plate is arranged around the fixed shaft. The spiral plate extends outward into the flue and contacts the inner wall of the flue on the side far from the preheating chamber.

[0012] The present invention is further configured such that: the water inlet tank is communicated with one end of the preheating chamber far from the heating chamber through a communicating pipe.

[0013] The present invention is further configured such that: the auxiliary part is arranged in a snake shape.

[0014] The present invention is further configured such that: a water inlet pipe is fixedly connected to one end of the water inlet tank far from the furnace body, and the water inlet pipe is used for introducing cold water into the water inlet tank.

[0015] In summary, compared with the prior art, the present invention has the following beneficial effects: through the arrangement of the flue, the preheating chamber, the auxiliary part and the water inlet tank, the present invention can make full use of the heat of the high-temperature flue gas generated by combustion and improve the utilization rate of heat. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the overall structure of the embodiment; Figure 2 Cross-sectional view of the overall structure of the embodiment; Figure 3 is Figure 2 Enlarged schematic view of part A of Figure 4 Schematic diagram showing the rotating shaft and the mixing plate in the embodiment.

[0017] In the figure: 1, furnace body; 2, combustion chamber; 21, gas supply unit; 3, flue; 4, exhaust pipe; 41, auxiliary part; 5, chimney; 6, heating chamber; 61, circular cavity; 611, rotating shaft; 612, mixing plate; 62, annular cavity; 621, water supply pipe; 7, preheating chamber; 8, water inlet tank; 81, water inlet pipe; 9, spiral plate; 91, fixed shaft. Specific implementation mode

[0018] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Based on the embodiments in this application, other similar embodiments obtained by those of ordinary skill in the art without creative efforts shall all fall within the scope of protection of this application. In addition, the directional terms mentioned in the following embodiments, such as "upper", "lower", "left", "right", etc., are only references to the directions in the drawings. Therefore, the directional terms used are for illustration rather than to limit the present invention.

[0019] The present invention will be further described below in conjunction with the drawings and preferred embodiments.

[0020] Embodiment: A gas boiler, see attached Figure 1 - attached Figure 4 , including a furnace body 1, a combustion chamber 2, a flue 3, an exhaust pipe 4, a chimney 5, a water inlet tank 8, a preheating chamber 7 and a heating chamber 6. The furnace body 1 is arranged as a circular tube with a horizontal axis and both ends closed; the combustion chamber 2 is arranged at one end of the furnace body 1; the flue 3 is arranged on one side of the combustion chamber 2 close to the other end of the furnace body 1, and the flue 3 is arranged as an annular channel; the exhaust pipe 4 is connected to the end of the flue 3 far from the combustion chamber 2, and the exhaust pipe 4 is provided with an auxiliary part 41, and the auxiliary part 41 is arranged at a position of the exhaust pipe 4 far from the flue 3; the chimney 5 is connected to the end of the auxiliary part 41 far from the flue 3; the water inlet tank 8 is arranged outside one end of the furnace body 1 far from the combustion chamber 2, and the auxiliary part 41 is arranged in the water inlet tank 8; the preheating chamber 7 is arranged inside the ring of the flue 3 and is arranged as a circular tube coaxial with the flue 3; the heating chamber 6 is arranged inside the furnace body 1 and is arranged on the top of the combustion chamber 2.

[0021] The fuel gas burns in the combustion chamber 2. The high-temperature flue gas generated by the combustion first passes through the flue 3 and the exhaust pipe 4, and finally is discharged through the chimney 5. The water first enters the water inlet tank 8 and then enters the preheating chamber 7 from the water inlet tank 8. In the water inlet tank 8 and the preheating chamber 7, it is preheated by the temperature-sensing flue gas, and then enters the heating chamber 6, where it is finally heated by the combustion of the fuel gas, so that the heat contained in the high-temperature flue gas can be utilized, and the heat generated by the combustion of the fuel gas can be fully utilized.

[0022] The combustion chamber 2 is set in a semi-circular ring shape with the open end of the semi-circular ring of the combustion chamber 2 facing upwards. The gas-fired boiler further includes a gas supply unit 21. A number of groups of the gas supply unit 21 are provided, and multiple groups of the gas supply unit 21 are arranged along the axial direction of the combustion chamber 2. Multiple gas supply units 21 in the same group are arranged around the axis of the combustion chamber 2.

[0023] The gas supply unit 21 includes a gas supply pipe, a gas mixer, and a combustion pipe. Two gas supply pipes are provided for the gas supply pipe, and the two gas supply pipes are respectively used for transporting fuel gas and air. The gas mixer is used to mix the fuel gas and air transported by the two gas supply pipes according to a preset ratio. The combustion pipe is used to transport the mixed gas after mixing into the combustion chamber 2 for combustion.

[0024] Through the setting of the gas mixer, the fuel gas and air can be mixed according to a preset ratio, and the preset ratio is the ratio of fuel gas and air when the fuel gas burns sufficiently, so that the fuel gas in the mixed gas transported into the combustion chamber 2 can burn sufficiently.

[0025] Specifically, the heating chamber 6 includes an annular cavity 62 and a circular cavity 61. The annular cavity 62 is arranged on the annular inner side of the combustion chamber 2. The circular cavity 61 is arranged inside the annular cavity 62. The circular cavity 61, the annular cavity 62, and the combustion chamber 2 are coaxial. The circular cavity 61 and the annular cavity 62 are connected through a number of communication holes arranged around the axis of the circular cavity 61.

[0026] Through the setting of the annular cavity 62, in cooperation with the annular combustion chamber 2 and the gas supply unit 21 arranged around the axis of the combustion chamber 2 in the combustion chamber 2, the water in each part of the annular cavity 62 can be heated sufficiently, thereby improving the uniformity of water heating in the annular cavity 62.

[0027] Specifically, the circular cavity 61 is communicated with the preheating chamber 7. A rotating shaft 611 coaxial with the heating chamber 6 is arranged in the heating chamber 6. The rotating shaft 611 is rotatably connected to the heating chamber 6. A number of mixing plates 612 located in the circular cavity 61 are fixedly connected to the outside of the rotating shaft 611, and a number of mixing plates 612 are evenly arranged around the rotating shaft 611.

[0028] Through the arrangement of the rotating shaft 611 and the mixing plate 612, the water fed into the circular cavity 61 from the preheating chamber 7 can be stirred and mixed, so that the water temperature in all parts of the circular cavity 61 is consistent, and thus the water temperature in all parts of the annular cavity 62 into which the water enters is consistent.

[0029] Specifically, this embodiment further includes a water supply pipe 621, and the water supply pipe 621 is fixedly connected to the end of the heating chamber 6 away from the flue 3 and the water supply pipe 621 communicates with the annular cavity 62.

[0030] Specifically, this embodiment further includes a fixed shaft 91 and a spiral plate 9. The fixed shaft 91 is arranged in the preheating chamber 7, and the fixed shaft 91 is coaxially arranged with the preheating chamber 7; the spiral plate 9 is arranged around the fixed shaft 91, and the spiral plate 9 extends outward into the flue 3 and contacts the inner wall of the flue 3 on the side away from the preheating chamber 7.

[0031] Through the arrangement of the spiral plate 9, the heat of the high-temperature flue gas in the flue 3 can be more fully conducted to the water in the preheating chamber 7 through the spiral plate 9. And through the arrangement of the spiral plate 9, the length of the flow path of the flue gas in the flue 3 can be increased and the length of the flow path of the water in the preheating chamber 7 can be increased, so that the heat in the high-temperature flue gas can be conducted to the water as fully as possible from the high-temperature flue gas.

[0032] Specifically, the water inlet tank 8 is connected to the end of the preheating chamber 7 away from the heating chamber 6 through a connecting pipe.

[0033] Specifically, the auxiliary part 41 is arranged in a snake shape.

[0034] Specifically, one end of the water inlet tank 8 away from the furnace body 1 is fixedly connected with a water inlet pipe 81, and the water inlet pipe 81 is used to introduce cold water into the water inlet tank 8.

[0035] The above is only the preferred embodiment of the present invention, and the protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the idea of the present invention belong to the protection scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A gas boiler, characterized in that: The furnace body (1) is configured as a circular tube with a horizontal axis and closed at both ends; A combustion chamber (2), the combustion chamber (2) being arranged at one end of the furnace body (1); A flue (3), the flue (3) being arranged on one side of the combustion chamber (2) close to the other end of the furnace body (1), and the flue (3) being arranged in the form of a circular annular channel; A smoke exhaust pipe (4), the smoke exhaust pipe (4) being connected to an end of the flue (3) away from the combustion chamber (2), the smoke exhaust pipe (4) being provided with an auxiliary portion (41), the auxiliary portion (41) being provided at a position of the smoke exhaust pipe (4) away from the flue (3); a chimney (5), the chimney (5) being connected to an end of the auxiliary portion (41) away from the flue (3); A water inlet box (8), the water inlet box (8) is arranged outside the furnace body (1) at one end away from the combustion chamber (2), and the auxiliary part (41) is arranged inside the water inlet box (8); A preheating chamber (7), the preheating chamber (7) being arranged inside the annular ring of the flue (3) and being arranged as a circular tube coaxial with the flue (3); and a heating chamber (6), which is arranged in the furnace body (1) and on the top of the combustion chamber (2).

2. A gas boiler according to claim 1, characterized in that: The combustion chamber (2) is arranged in a semicircular ring shape, and the semicircular ring of the combustion chamber (2) is open upward; The gas boiler further comprises an air supply unit (21), wherein the air supply unit (21) is provided in a plurality of groups, wherein the plurality of groups of air supply units (21) are arranged along the axis direction of the combustion chamber (2), and the plurality of air supply units (21) in the same group are arranged around the axis of the combustion chamber (2).

3. A gas boiler according to claim 2, characterized in that: The gas supply unit (21) comprises two gas supply pipes, and the two gas supply pipes are used to transport gas and air respectively; A gas mixer, which is used to mix the gas and air transported by the two gas supply pipes in a preset ratio; and a combustion tube, wherein the combustion tube is used to transport the mixed gas to the combustion chamber (2) for combustion.

4. A gas boiler according to claim 3, characterized in that: The heating chamber (6) comprises an annular cavity (62), wherein the annular cavity (62) is arranged on the inner side of the annular portion of the combustion chamber (2); and a circular cavity (61), wherein the circular cavity (61) is arranged inside the annular cavity (62), the circular cavity (61), the annular cavity (62) and the combustion chamber (2) are coaxial, and the circular cavity (61) and the annular cavity (62) are connected through a plurality of connecting holes arranged around the axis of the circular cavity (61).

5. A gas boiler according to claim 4, characterized in that: A rotating shaft (611) coaxial with the heating chamber (6) is provided in the heating chamber (6), and the rotating shaft (611) is rotatably connected to the heating chamber (6); A plurality of mixing plates (612) located in the circular cavity (61) are fixedly connected to the outside of the rotating shaft (611), and the plurality of mixing plates (612) are evenly arranged around the rotating shaft (611).

6. A gas boiler according to claim 5, characterized in that: It also includes a water supply pipe (621), which is fixedly connected to one end of the heating chamber (6) away from the flue (3) and is in communication with the annular cavity (62).

7. A gas boiler according to claim 6, characterized in that: It also includes a fixed shaft (91), the fixed shaft (91) is arranged in the preheating chamber (7), and the fixed shaft (91) and the preheating chamber (7) are coaxially arranged; and a spiral plate (9) which is arranged around a fixed shaft (91), the spiral plate (9) extends outwardly into the flue (3) and contacts the inner wall of the flue (3) on the side far from the preheating chamber (7).

8. A gas boiler according to claim 7, characterized in that: The water inlet tank (8) is communicated with one end of the preheating chamber (7) far from the heating chamber (6) through a connecting pipe.

9. A gas boiler according to claim 8, characterized in that: The auxiliary part (41) is arranged in a serpentine shape.

10. A gas boiler according to claim 9, characterized in that: One end of the water inlet tank (8) far from the furnace body (1) is fixedly connected with a water inlet pipe (81), and the water inlet pipe (81) is used to introduce cold water into the water inlet tank (8).

Images