An ultra-low-nitrogen condensing gas boiler

Abstract

The utility model discloses a kind of ultra-low nitrogen condensing gas boilers, including gas boiler body, the surface below of gas boiler body is provided with support frame, the inside of gas boiler body is provided with multiple return flue, the surface of gas boiler body is provided with economizer, one end of gas boiler body is provided with premix ultra-low nitrogen burner, the surface of premix ultra-low nitrogen burner is fixedly connected with water pump, in the process of using, the inside of return flue is spiral groove, spiral groove can make spiral motion when flue gas flows, increase flue gas and return flue wall contact area and contact time, simultaneously, spiral groove can disturb flue gas, destroy boundary layer, reduce thermal resistance, strengthen heat transfer, and copper extension heat sink further increases heat dissipation area, copper good thermal conductivity also help heat quickly transfer, can effectively improve the heat exchange efficiency of flue, improve energy utilization.

Description

Technical Field

[0001] This utility model belongs to the field of gas boiler technology, and in particular relates to an ultra-low nitrogen condensing gas boiler. Background Technology

[0002] In gas-fired boilers currently on the market, after the fuel is burned in the furnace, the flue gas enters the first pass straight flue pipe surrounding the furnace through the combustion chamber and reaches the front smoke box. Then it enters the second pass straight flue pipe and is finally discharged into the atmosphere through the chimney.

[0003] Some existing gas-fired boilers may have low efficiency in utilizing waste heat inside the return flue, thus reducing energy efficiency. Utility Model Content

[0004] To address the problems existing in the prior art, this utility model provides an ultra-low nitrogen condensing gas boiler. During use, the interior of the return flue is a spiral groove. The spiral groove causes the flue gas to generate a spiral motion as it flows through, increasing the contact area and contact time between the flue gas and the pipe wall of the return flue. At the same time, the spiral groove can disturb the flue gas, break the boundary layer, reduce thermal resistance, and enhance heat transfer. The extended copper heat dissipation plate further increases the heat dissipation area, and the good thermal conductivity of copper also helps to transfer heat quickly, which can effectively improve the heat exchange efficiency of the flue and improve energy utilization.

[0005] To achieve the above objectives, this utility model provides the following technical solution: an ultra-low nitrogen condensing gas boiler, comprising a gas boiler body, a support frame disposed below the surface of the gas boiler body, multiple return flue pipes disposed inside the gas boiler body, an economizer disposed above the surface of the gas boiler body, a premixed ultra-low nitrogen burner disposed at one end of the gas boiler body, a water pump fixedly connected to the surface of the premixed ultra-low nitrogen burner, a spiral groove opened inside the return flue pipe, and multiple extended heat dissipation plates fixedly connected to the surface of the return flue pipe.

[0006] Furthermore, the interior of the extended heat sink is connected to the interior of the spiral groove.

[0007] Furthermore, the extended heat sink is made of copper and is shaped like a triangular prism.

[0008] Compared with the prior art, the beneficial effects of this utility model are:

[0009] During use, the interior of the return flue has spiral grooves. These grooves cause the flue gas to move in a spiral motion as it flows through, increasing the contact area and contact time between the flue gas and the wall of the return flue. At the same time, the spiral grooves can disturb the flue gas, break the boundary layer, reduce thermal resistance, and enhance heat transfer. The extended copper heat sink further increases the heat dissipation area, and the good thermal conductivity of copper also helps to transfer heat quickly, which can effectively improve the heat exchange efficiency of the flue and improve energy utilization. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the overall structure of this utility model.

[0011] Figure 2 This is a cross-sectional view of the overall structure of this utility model.

[0012] Figure 3 This is a cross-sectional view of the return flue structure of this utility model.

[0013] Figure 4 This is a schematic diagram of the return flue structure of this utility model.

[0014] In the diagram: 1. Support frame; 2. Gas boiler body; 3. Premixed ultra-low NOx burner; 4. Return flue; 5. Spiral groove; 6. Extended heat dissipation plate; 7. Eco-friendly device; 8. Water pump. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0016] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Example

[0017] See appendix Figure 1-4As shown, an ultra-low nitrogen condensing gas boiler includes a gas boiler body 2, a support frame 1 is provided below the surface of the gas boiler body 2, multiple return flue pipes 4 are provided inside the gas boiler body 2, an economizer 7 is provided above the surface of the gas boiler body 2, a premixed ultra-low nitrogen burner 3 is provided at one end of the gas boiler body 2, a water pump 8 is fixedly connected to the surface of the premixed ultra-low nitrogen burner 3, a spiral groove 5 is opened inside the return flue pipe 4, and multiple extended heat dissipation plates 6 are fixedly connected to the surface of the return flue pipe 4.

[0018] The interior of the extended heat sink 6 is connected to the interior of the spiral groove 5.

[0019] The extended heat sink 6 is made of copper and is shaped like a triangular prism.

[0020] Working Principle: The gas-fired boiler body 2 consists of a series of devices including a return flue 4, a premixed ultra-low NOx burner 3, an economizer 7, and a water pump 8. This is existing technology, and its working principle will not be elaborated here. During operation, the return flue 4 has spiral grooves 5 inside. These grooves create a spiral motion as the flue gas flows through, increasing the contact area and contact time between the flue gas and the pipe wall of the return flue 4. Simultaneously, the spiral grooves 5 disturb the flue gas, disrupt the boundary layer, reduce thermal resistance, and enhance heat transfer. The extended copper heat dissipation plate 6 further increases the heat dissipation area, and the excellent thermal conductivity of copper also facilitates rapid heat transfer, effectively improving the heat exchange efficiency of the flue and increasing energy utilization. When the flue gas flows within the spiral groove 5, it generates rotation and vortex motion. This airflow state can disrupt the normal movement trajectory of ash particles, making it difficult for them to adhere stably to the surface of the return flue pipe 4. Some smaller ash particles will also be thrown off due to centrifugal force. In addition, the relatively smooth surface of the copper extended heat dissipation plate 6 can weaken the adsorption force between ash particles and the surface, reduce the ash accumulation rate, and enable the equipment to maintain good heat exchange efficiency for a long time. The combination of the spiral groove 5 structure and the copper extended heat dissipation plate 6 with the return flue pipe 4 can enhance the structural strength of the return flue pipe 4 to a certain extent, enabling it to better withstand high temperature and high pressure conditions, reduce the risk of deformation and damage, and extend its service life.

[0021] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this utility model, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0022] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. An ultra-low nitrogen condensing gas-fired boiler, comprising a gas-fired boiler body (2), characterized in that: A support frame (1) is provided below the surface of the gas boiler body (2). Multiple return flue pipes (4) are provided inside the gas boiler body (2). An energy saver (7) is provided above the surface of the gas boiler body (2). A premixed ultra-low nitrogen burner (3) is provided at one end of the gas boiler body (2). A water pump (8) is fixedly connected to the surface of the premixed ultra-low nitrogen burner (3). A spiral groove (5) is opened inside the return flue pipe (4). Multiple extended heat dissipation plates (6) are fixedly connected to the surface of the return flue pipe (4).

2. The ultra-low nitrogen condensing gas boiler according to claim 1, characterized in that: The interior of the extended heat sink (6) is connected to the interior of the spiral groove (5).

3. The ultra-low nitrogen condensing gas boiler according to claim 1, characterized in that: The extended heat sink (6) is made of copper and is shaped like a triangular prism.

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