Multi-fuel co-combustion small and medium-sized horizontal boiler

Abstract

The invention relates to a multi-fuel co-combustion small and medium-sized horizontal boiler which comprises a boiler body, a smoke exhaust port, a combustion furnace door, an ash discharge hopper, an air inlet door, a boiler circulating water pipe, a gas-liquid fuel pipe and an air duct switching structure. The boiler body is composed of a boiler body wall, a fuel partitioning partition plate, a flow guide plate, a combustion furnace ash net partition plate, a maintenance sealing protection plate and a heat exchange smoke exhaust cavity partition plate; the interior of the boiler body is divided into a gas-liquid combustion ventilation cavity, a solid combustion cavity, an ash cavity, a heat exchange cavity and a smoke and gas exhaust cavity. According to the multi-fuel boiler, the arrangement of small and medium-sized horizontal boilers is optimized, the structural design of a traditional boiler is changed, the boiler suitable for multiple fuels is designed, the multi-fuel multi-fuel combustion function and the single-fuel combustion function are achieved, the more reasonable air duct design is adopted, the influence of mutual combustion is reduced, pollutants generated by internal combustion can be reduced, and the multi-fuel boiler is suitable for application and popularization.

Description

Technical Field

[0001] The present invention relates to the field of boilers, and in particular to a medium-sized horizontal boiler for multi-fuel co-firing. Background Art

[0002] Against the backdrop of energy structure transformation and stricter environmental protection policies, the application of small and medium-sized horizontal boilers faces new challenges. Traditional small and medium-sized horizontal boilers are mostly based on a single fuel. For example, coal-fired boilers are widely used in areas rich in coal resources, but the combustion efficiency of coal is limited. With the reduction of high-quality coal resources, the use of low-quality coal further reduces the combustion efficiency, resulting in energy waste. Taking coal-fired boilers as an example, a large amount of pollutants such as sulfur dioxide, nitrogen oxides and particulate matter are released during the coal combustion process. The energy supply situation in different regions varies greatly. Some regions are rich in coal resources, while other regions have more biomass resources or natural gas resources. In order to make the boiler more widely applicable, a small and medium-sized horizontal boiler with multi-fuel mixed combustion is designed. Summary of the Invention

[0003] The purpose of the present invention is to provide a medium-sized horizontal boiler with multi-fuel mixing to solve the above technical problems. To achieve the above purpose, the present invention adopts the following technical solutions: A small and medium-sized horizontal boiler for multi-fuel co-firing, comprising a boiler body, a smoke exhaust port, a combustion furnace door, an ash hopper, an air inlet door, a boiler circulating water pipe, a gas-liquid fuel pipe, and an air duct switching structure. An air inlet is provided on the bottom side of the side end of the boiler body, the air inlet door is correspondingly arranged on the air inlet, the smoke exhaust port is arranged on the top side of the side end of the boiler body, the gas-liquid fuel pipe is connected to the side end side of the boiler body, an ash discharge port and a combustion furnace port are provided on the front side of the boiler body, the combustion furnace door is correspondingly arranged on the outside of the combustion furnace port, the ash hopper is correspondingly arranged in the ash discharge port, and the combustion furnace door and the ash hopper are arranged side by side up and down on the front side of the boiler body, the boiler circulating water pipe is connected to the front side of the boiler body, the air duct switching structure is arranged in the boiler body, and the side end of the air duct switching structure passes through the side of the boiler body.

[0004] Based on the above technical solution, a heat exchange circulating water pipe and a gas-liquid fuel furnace structure are provided inside the boiler furnace body. The boiler circulating water pipe is connected to the head and tail ends of the heat exchange circulating water pipe, and the gas-liquid fuel pipe is connected to the side end of the gas-liquid fuel furnace structure.

[0005] On the basis of the above technical solution, the boiler furnace body is composed of a furnace body wall, a fuel partitioning partition, a guide plate, a combustion ash mesh partition, a maintenance sealing guard plate, and a heat exchange and exhaust chamber partition. The inner part of the boiler furnace body is divided into a gas-liquid combustion ventilation chamber, a solid combustion chamber, an ash chamber, a heat exchange chamber, and an exhaust and smoke chamber. The gas-liquid combustion ventilation chamber is tilted on the inner top side corner of the boiler furnace body, and the side bottom end of the gas-liquid combustion ventilation chamber is connected to the air inlet. The solid combustion chamber is arranged on the bottom side of the gas-liquid combustion ventilation chamber, and a fuel partitioning partition is arranged between the solid combustion chamber and the gas-liquid combustion ventilation chamber. The ash chamber is arranged on the bottom side of the solid combustion chamber. A combustion ash mesh partition is arranged between the solid combustion chamber and the ash chamber. The solid combustion chamber is arranged on the inner side of the combustion furnace mouth. The ash chamber is arranged on the inner side of the ash discharge port, and the heat exchange chamber is arranged on the other side of the gas-liquid combustion ventilation chamber, the solid combustion chamber and the ash chamber. There is a furnace body wall between the heat exchange chamber and the ash chamber, and guide plates are arranged between the heat exchange chamber and the gas-liquid combustion ventilation chamber and the solid combustion chamber. A heat exchange and smoke exhaust chamber partition is vertically arranged on the side of the heat exchange chamber, and a heat exchange and smoke exhaust chamber partition is arranged between the smoke exhaust chamber and the heat exchange chamber, and the side end top side of the smoke exhaust chamber is connected with the smoke exhaust port. A maintenance sealing guard plate is provided on the furnace body wall of the side wall of the heat exchange chamber, and the air duct switching structure is arranged at the bottom end of the gas-liquid combustion ventilation chamber and the bottom side side of the solid combustion chamber, and the air duct switching structure can be switched and blocked at the bottom end of the gas-liquid combustion ventilation chamber and the bottom side side of the solid combustion chamber.

[0006] On the basis of the above technical solution, the air duct switching structure is composed of a hanging ring rotating tube, an adjusting handle, a rotating shaft, and a partition sealing plate. The rotating shaft is fixed to the side of the partition sealing plate, and the adjusting handle is fixed to the side end of the rotating shaft. The rotating shaft is connected to the hanging ring rotating tube, and the adjusting handle and the partition sealing plate can rotate with the rotating shaft and the hanging ring rotating tube as the axis. The hanging ring rotating tube is fixed on the side wall of the solid combustion chamber and the bottom side wall of the gas-liquid combustion ventilation chamber. A slide groove and a positioning slot are opened on the furnace body wall. The positioning slots are correspondingly arranged at the upper and lower ends of the slide groove, and the adjusting handle is inserted into the slide groove and the positioning slot.

[0007] On the basis of the above technical solution, the gas-liquid fuel furnace structure is arranged on the side wall and bottom surface of the heat exchange chamber, and the gas-liquid fuel furnace structure is arranged on the inner side of the guide plate between the gas-liquid combustion ventilation chamber and the heat exchange chamber, and the heat exchange circulation water pipe is arranged in the heat exchange chamber. The gas-liquid fuel furnace structure is composed of an air supply pipe, a diversion pipe, a fuel nozzle, and a gas-liquid fuel furnace fixed plate. The gas-liquid fuel furnace fixed plate and the diversion pipe are respectively provided with several groups, and the gas-liquid fuel furnace fixed plate and the diversion pipe are arranged and fixed crosswise. The fuel nozzle is provided with several groups, and several groups of fuel nozzles are arranged at equal intervals and connected to the diversion pipe. The side ends of the several groups of diversion pipes are connected to the air supply pipe, and the side ends of the air supply pipe are connected to the gas-liquid fuel pipe.

[0008] Compared with the existing technology, the present invention has the following advantages: the present invention optimizes the setting of small and medium-sized horizontal boilers, changes the structural design of traditional boilers, and designs a boiler suitable for multiple fuels. This structure has the functions of multi-fuel mixed combustion and single fuel combustion, and adopts a more reasonable air duct design to reduce the impact of mutual combustion and can reduce pollutants generated by internal combustion, and is suitable for popularization and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 This is a diagram of the overall appearance of the present invention.

[0010] Figure 2 This is a schematic diagram of the structure of the present invention in an open state.

[0011] Figure 3 It is a half-section schematic diagram of the structure of the present invention.

[0012] Figure 4 It is a schematic diagram of a half-section split of the structure of the present invention.

[0013] Figure 5 This is a schematic diagram of the details of the half-section of the boiler furnace body of the present invention.

[0014] Figure 6 It is a schematic diagram of the partial connection state of the air duct switching structure of the present invention.

[0015] Figure 7 This is a schematic diagram of the local details of the gas-liquid fuel furnace structure of the present invention.

[0016] In the figure: boiler body 1, smoke exhaust port 2, combustion furnace door 3, ash discharge hopper 4, air inlet door 6, boiler circulating water pipe 7, gas-liquid fuel pipe 8, air duct switching structure 9, air inlet 10, ash discharge port 11, combustion furnace port 12, heat exchange circulating water pipe 13, gas-liquid fuel furnace structure 14; Furnace wall 1-1, fuel partition plate 1-2, guide plate 1-3, combustion furnace ash screen 1-4, maintenance sealing guard plate 1-5, heat exchange and smoke exhaust cavity partition 1-6, gas-liquid combustion ventilation cavity 1-7, solid combustion cavity 1-8, ash cavity 1-9, heat exchange cavity 1-10, smoke exhaust cavity 1-11; Lifting ring swivel 9-1, adjustment handle 9-2, rotating shaft 9-3, partition blocking plate 9-4, positioning slot 9-5, slideway slot 9-6; Gas supply pipe 14-1, branch pipe 14-2, fuel injection port 14-3, gas-liquid fuel furnace fixing plate 14-4. DETAILED DESCRIPTION

[0017] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementations.

[0018] A small and medium-sized horizontal boiler for multi-fuel mixed combustion includes a boiler furnace body 1, a smoke exhaust port 2, a combustion furnace door 3, an ash hopper 4, an air inlet door 6, a boiler circulating water pipe 7, a gas-liquid fuel pipe 8, and an air duct switching structure 9. The boiler furnace body 1 is provided with an air inlet 10 at the bottom edge of the side end, the air inlet door 6 is correspondingly arranged on the air inlet 10, the smoke exhaust port 2 is arranged at the top edge of the side end of the boiler furnace body 1, the gas-liquid fuel pipe 8 is connected to the side end side of the boiler furnace body 1, the front side of the boiler furnace body 1 is provided with an ash discharge port 11 and a combustion furnace port 12, the combustion furnace door 3 is correspondingly arranged on the outside of the combustion furnace port 12, the ash hopper 4 is correspondingly arranged in the ash discharge port 11, and the combustion furnace door 3 and the ash hopper 4 are arranged side by side up and down on the front side of the boiler furnace body 1, the boiler circulating water pipe 7 is connected to the front side of the boiler furnace body 1, the air duct switching structure 9 is arranged in the boiler furnace body 1, and the side end of the air duct switching structure 9 passes through the side of the boiler furnace body 1.

[0019] A heat exchange circulating water pipe 13 and a gas-liquid fuel furnace structure 14 are provided inside the boiler furnace body 1. The boiler circulating water pipe 7 is connected to both ends of the heat exchange circulating water pipe 13, and the gas-liquid fuel pipe 8 is connected to the side end of the gas-liquid fuel furnace structure 14.

[0020] The boiler furnace body 1 is composed of a furnace wall 1-1, a fuel partition partition 1-2, a guide plate 1-3, a combustion furnace ash mesh partition 1-4, a maintenance sealing guard plate 1-5, and a heat exchange and exhaust cavity partition 1-6. The interior of the boiler furnace body 1 is divided into a gas-liquid combustion ventilation cavity 1-7, a solid combustion cavity 1-8, an ash cavity 1-9, a heat exchange cavity 1-10, and an exhaust cavity 1-11. The gas-liquid combustion ventilation cavity 1-7 is tilted at the inner top side angle of the boiler furnace body 1, and the ... The side bottom end is connected with the air inlet 10, the solid combustion chamber 1-8 is arranged on the bottom side of the gas-liquid combustion ventilation chamber 1-7, and a fuel partition partition 1-2 is provided between the solid combustion chamber 1-8 and the gas-liquid combustion ventilation chamber 1-7, the ash chamber 1-9 is arranged on the bottom side of the solid combustion chamber 1-8, a combustion furnace ash mesh partition 1-4 is provided between the solid combustion chamber 1-8 and the ash chamber 1-9, the solid combustion chamber 1-8 is arranged on the inner side of the combustion furnace port 12, and the ash chamber 1-9 is provided with a fuel partition 1-2. Located on the inner side of the ash discharge port 11, the heat exchange chamber 1-10 is arranged on the other side of the gas-liquid combustion ventilation chamber 1-7, the solid combustion chamber 1-8, and the ash chamber 1-9. There is a furnace body wall 1-1 between the heat exchange chamber 1-10 and the ash chamber 1-9. A guide plate 1-3 is provided between the heat exchange chamber 1-10 and the gas-liquid combustion ventilation chamber 1-7 and the solid combustion chamber 1-8. A heat exchange and smoke exhaust chamber partition 1-6 is vertically provided on the side of the heat exchange chamber 1-10. The smoke exhaust chamber 1-11 and A heat exchange and smoke exhaust chamber partition 1-6 is arranged between the heat exchange chambers 1-10, and the side top side of the smoke exhaust chamber 1-11 is connected to the smoke exhaust port 2, and a maintenance sealing guard plate 1-5 is arranged on the furnace body wall 1-1 of the side wall of the heat exchange chamber 1-10. The air duct switching structure 9 is arranged at the bottom end of the gas-liquid combustion ventilation chamber 1-7 and the bottom side of the solid combustion chamber 1-8, and the air duct switching structure 9 can be switched to block the bottom end of the gas-liquid combustion ventilation chamber 1-7 and the bottom side of the solid combustion chamber 1-8.

[0021] The air duct switching structure 9 is composed of a hanging ring rotating tube 9-1, an adjusting handle 9-2, a rotating shaft 9-3, and a partition sealing plate 9-4. The rotating shaft 9-3 is fixed on the side of the partition sealing plate 9-4, and the adjusting handle 9-2 is fixed on the side end of the rotating shaft 9-3. The rotating shaft 9-3 is connected to the hanging ring rotating tube 9-1, and the adjusting handle 9-2 and the partition sealing plate 9-4 can rotate with the rotating shaft 9-3 and the hanging ring rotating tube 9-1 as the axis. The hanging ring rotating tube 9-1 is fixed on the side wall of the solid combustion chamber 1-8 and the bottom side wall of the gas-liquid combustion ventilation chamber 1-7. A slide groove 9-6 and a positioning card groove 9-5 are opened on the furnace body wall 1-1. The positioning card groove 9-5 is correspondingly arranged at the upper and lower ends of the slide groove 9-6, and the adjusting handle 9-2 is inserted into the slide groove 9-6 and the positioning card groove 9-5.

[0022] The gas-liquid fuel furnace structure 14 is arranged on the side wall and bottom surface of the heat exchange cavity 1-10, and the gas-liquid fuel furnace structure 14 is arranged on the inner side of the guide plate 1-3 between the gas-liquid combustion ventilation cavity 1-7 and the heat exchange cavity 1-10, and the heat exchange circulation water pipe 13 is arranged in the heat exchange cavity 1-10. The gas-liquid fuel furnace structure 14 is composed of an air supply pipe 14-1, a diversion pipe 14-2, a fuel ejection port 14-3, and a gas-liquid fuel furnace fixing plate 14-4. The material furnace fixing plate 14-4 and the diversion pipe 14-2 are respectively provided with several groups, and the gas-liquid fuel furnace fixing plate 14-4 and the diversion pipe 14-2 are arranged cross-fixed, and the fuel nozzle 14-3 is provided with several groups, and several groups of fuel nozzles 14-3 are arranged at equal intervals and connected to the diversion pipe 14-2, and the side ends of the several groups of diversion pipes 14-2 are connected to the gas supply pipe 14-1, and the side ends of the gas supply pipe 14-1 are connected to the gas-liquid fuel pipe 8.

[0023] Working principle of the invention: This structure mainly has three important features.

[0024] First, this boiler is designed with air ducts for different combustion zones, which are controlled and adjusted by structure 9. The corresponding air duct flow can be locked, and dynamic adjustment can also be performed. When gas-liquid fuel combustion is required, the partition sealing plate 9-4 can be moved to block the gap connecting the air inlet 10 and the solid combustion chamber 1-8, so that the possibility of air inflow into the solid combustion chamber 1-8 will be reduced; when solid fuel combustion is required, the partition sealing plate 9-4 can be moved to block the position connecting the air inlet 10 and the gas-liquid combustion ventilation chamber 1-7, so that the air flow into the gas-liquid combustion ventilation chamber 1-7 can be reduced; when solid and gas-liquid mixed combustion is required, the adjustment handle 9-2 can be adjusted to the position of the slide groove 9-6 corresponding to achieve joint combustion.

[0025] Secondly, the design of the gas-liquid fuel furnace structure 14 is to align the two sides with the heat exchange circulation water pipe 13, which can make the heat exchange effect more sufficient and reduce the waste of waste heat. The design of the heat exchange and smoke exhaust cavity partitions 1-6 can also further increase the range of heat flow and increase the heat exchange efficiency.

[0026] Third, when multiple fuels are mixed and burned, the exhaust gas discharge can be reduced and the calorific value can be increased. For example, when coal, wood and other materials are burned inside the solid combustion chamber 1-8, some harmful gases such as sulfur dioxide will inevitably be produced. When the gas supply pipe 14-1 is supplied with a combustion gas and liquid with a higher combustion temperature and which helps to absorb and mix harmful gases, the harmful gases in the combustion chamber can be reduced and discharged through the smoke exhaust chamber 1-11.

[0027] Fourthly, maintenance is simple. Because the structural design is simple and reasonable, the maintenance of this boiler is also very simple. It only requires daily cleaning of combustion ashes and flue gas ashes, and regular inspection of the corresponding components of the internal gas-liquid fuel furnace structure 14 to ensure safe operation.

[0028] The above is a preferred embodiment of the present invention. For ordinary technicians in this field, based on the teachings of the present invention, without departing from the principles and spirit of the present invention, changes, modifications, substitutions and variations made to the implementation methods are still within the scope of protection of the present invention.

Claims

1. A medium-sized horizontal boiler with multi-fuel mixing, characterized in that: The invention comprises a boiler furnace body (1), a smoke exhaust port (2), a combustion furnace door (3), an ash hopper (4), an air inlet door (6), a boiler circulating water pipe (7), a gas-liquid fuel pipe (8), and an air duct switching structure (9). The bottom edge of the side end of the boiler furnace body (1) is provided with an air inlet (10), the air inlet door (6) is correspondingly arranged on the air inlet (10), the smoke exhaust port (2) is arranged on the top edge of the side end of the boiler furnace body (1), the gas-liquid fuel pipe (8) is connected to the side end side of the boiler furnace body (1), and the front of the boiler furnace body (1) is provided with a gas inlet (10). An ash discharge port (11) and a combustion furnace port (12) are provided on the side, the combustion furnace door (3) is correspondingly arranged on the outside of the combustion furnace port (12), the ash discharge hopper (4) is correspondingly arranged in the ash discharge port (11), and the combustion furnace door (3) and the ash discharge hopper (4) are arranged in parallel on the front side of the boiler furnace body (1), the boiler circulating water pipe (7) is connected to the front side of the boiler furnace body (1), and the air duct switching structure (9) is arranged in the boiler furnace body (1), and the side end of the air duct switching structure (9) passes through the side of the boiler furnace body (1).

2. A medium-sized horizontal boiler for multi-fuel mixing according to claim 1, characterized in that: A heat exchange circulating water pipe (13) and a gas-liquid fuel furnace structure (14) are provided inside the boiler furnace body (1); the boiler circulating water pipe (7) is connected to both ends of the heat exchange circulating water pipe (13); and the gas-liquid fuel pipe (8) is connected to the side end of the gas-liquid fuel furnace structure (14).

3. A medium-sized horizontal boiler for multi-fuel mixing according to claim 2, characterized in that: The boiler furnace body (1) is composed of a furnace body wall (1-1), a fuel partitioning plate (1-2), a guide plate (1-3), a combustion furnace ash mesh partition (1-4), a maintenance sealing plate (1-5), and a heat exchange and exhaust cavity partition (1-6). The interior of the boiler furnace body (1) is divided into a gas-liquid combustion ventilation cavity (1-7), a solid combustion cavity (1-8), an ash cavity (1-9), a heat exchange cavity (1-10), and an exhaust and smoke cavity (1-11). The gas-liquid combustion ventilation cavity (1-7) is tiltedly arranged on the inner top side corner of the boiler furnace body (1), and the ... -7) is connected to the air inlet (10), the solid combustion chamber (1-8) is arranged on the bottom side of the gas-liquid combustion ventilation chamber (1-7), and a fuel partitioning plate (1-2) is arranged between the solid combustion chamber (1-8) and the gas-liquid combustion ventilation chamber (1-7), the ash chamber (1-9) is arranged on the bottom side of the solid combustion chamber (1-8), a combustion furnace ash mesh partition (1-4) is arranged between the solid combustion chamber (1-8) and the ash chamber (1-9), the solid combustion chamber (1-8) is arranged on the inner side of the combustion furnace port (12), and the ash chamber (1-9) is provided with a fuel partitioning plate (1-2) between the solid combustion chamber (1-8) and the gas-liquid combustion ventilation chamber (1-7). ) is arranged on the inner side of the ash discharge port (11), the heat exchange chamber (1-10) is arranged on the other side of the gas-liquid combustion ventilation chamber (1-7), the solid combustion chamber (1-8), and the ash chamber (1-9), a furnace body wall (1-1) is provided between the heat exchange chamber (1-10) and the ash chamber (1-9), a guide plate (1-3) is provided between the heat exchange chamber (1-10) and the gas-liquid combustion ventilation chamber (1-7) and the solid combustion chamber (1-8), a heat exchange and smoke exhaust chamber partition (1-6) is vertically provided on the side of the heat exchange chamber (1-10), and the smoke exhaust chamber (1-1 A heat exchange and smoke exhaust chamber partition (1-6) is provided between the heat exchange chamber (1-10) and the heat exchange chamber (1-10), and the top side of the side end of the smoke exhaust chamber (1-11) is communicated with the smoke exhaust port (2), a maintenance sealing guard plate (1-5) is provided on the furnace body wall (1-1) of the side wall of the heat exchange chamber (1-10), and the air duct switching structure (9) is provided at the bottom end of the gas-liquid combustion ventilation chamber (1-7) and the bottom side of the solid combustion chamber (1-8), and the air duct switching structure (9) can be switched to be blocked at the bottom end of the gas-liquid combustion ventilation chamber (1-7) and the bottom side of the solid combustion chamber (1-8).

4. A medium-sized horizontal boiler for multi-fuel mixing according to claim 3, characterized in that: The air duct switching structure (9) is composed of a lifting ring rotating tube (9-1), an adjusting handle (9-2), a rotating shaft (9-3), and a partition blocking plate (9-4); the rotating shaft (9-3) is fixed to the side of the partition blocking plate (9-4); the adjusting handle (9-2) is fixed to the side end of the rotating shaft (9-3); the rotating shaft (9-3) is connected to the lifting ring rotating tube (9-1); and the adjusting handle (9-2) and the partition blocking plate (9-4) are connected to the rotating shaft (9- 3) and the lifting ring rotating tube (9-1) are rotatable about an axis, the lifting ring rotating tube (9-1) is fixed on the side wall of the solid combustion chamber (1-8) and the bottom side wall of the gas-liquid combustion ventilation chamber (1-7), the furnace body wall (1-1) is provided with a slide groove (9-6) and a positioning card groove (9-5), the positioning card groove (9-5) is correspondingly arranged at the upper and lower ends of the slide groove (9-6), and the adjusting handle (9-2) is inserted into the slide groove (9-6) and the positioning card groove (9-5).

5. The medium and small-sized horizontal boiler for multi-fuel co-firing according to claim 3, characterized in that: The gas-liquid fuel furnace structure (14) is arranged on the side wall and bottom surface of the heat exchange cavity (1-10), and the gas-liquid fuel furnace structure (14) is arranged on the inner side of the guide plate (1-3) between the gas-liquid combustion ventilation cavity (1-7) and the heat exchange cavity (1-10), and the heat exchange circulation water pipe (13) is arranged in the heat exchange cavity (1-10). The gas-liquid fuel furnace structure (14) consists of an air supply pipe (14-1), a diversion pipe (14-2), a fuel ejection port (14-3), and a gas-liquid fuel furnace fixing plate (14-4). The liquid fuel furnace fixing plate (14-4) and the diversion pipe (14-2) are respectively provided with a plurality of groups, the gas-liquid fuel furnace fixing plate (14-4) and the diversion pipe (14-2) are arranged crosswise and fixed, the fuel ejection port (14-3) is provided with a plurality of groups, the plurality of groups of fuel ejection ports (14-3) are arranged at equal intervals and connected to the diversion pipe (14-2), the side ends of the plurality of groups of diversion pipes (14-2) are connected to the gas supply pipe (14-1), and the side ends of the gas supply pipe (14-1) are connected to the gas-liquid fuel pipe (8).

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