Efficient fuel gas steam generator

Abstract

The utility model discloses an efficient fuel gas steam generator which comprises a boiler body, a heat exchange cavity is arranged in the boiler body, a steam outlet and a smoke outlet are led out from the boiler body, and a burner is installed at the top or the bottom of the boiler body. Fuel gas enters the heat exchange cavity in the mode of entering from the upper portion or entering from the lower portion to be combusted and conduct heat exchange. According to the steam generator provided by the utility model, the flow path of smoke generated after combustion in the steam generator can be optimized, namely two return strokes are adopted, so that the smoke exchanges heat with a heated surface for multiple times in the steam generator, the heat loss is reduced, and the heat exchange efficiency is improved.

Description

Technical Field

[0001] This utility model relates to a steam generator, and more particularly to a high-efficiency gas-fired steam generator. Background Technology

[0002] Existing gas-fired steam generators generally suffer from problems such as low heat exchange efficiency, low space utilization, and significant safety hazards. Traditional steam generator designs commonly exhibit uneven heat exchange, unreasonable heating surface arrangement, and large heat losses, while also posing a high risk of gas accumulation. Therefore, an innovative gas-fired steam generator design is urgently needed to address these issues. Utility Model Content

[0003] The purpose of this invention is to provide a high-efficiency gas-fired steam generator that optimizes the heat exchange path to achieve efficient operation and full utilization of energy.

[0004] To achieve the above objectives, this utility model provides the following technical solution:

[0005] A high-efficiency gas-fired steam generator includes a boiler body with a heat exchange chamber inside the boiler body, a steam outlet and a flue gas outlet leading out from the boiler body, and a burner installed at the top or bottom of the boiler body. Gas enters the heat exchange chamber from above or from below and is burned and undergoes heat exchange.

[0006] Preferably, in the boiler body, an enclosed steam-water space is formed between the outer cylinder and the inner cylinder. The internal cavity of the inner cylinder serves as the first heat exchange cavity. When the flue gas generated by the combustion of gas passes through the first heat exchange cavity, it exchanges heat with the steam-water space between the outer cylinder and the inner cylinder. A finned tube is welded to the upper and lower sides of the outer cylinder. The finned tube is vertically arranged and its upper and lower ends are connected to the respective steam-water spaces. A smoke baffle shell is covered on the outside of the finned tube. The internal cavity of the smoke baffle shell serves as the second heat exchange cavity. When the flue gas generated by the combustion of gas passes through the second heat exchange cavity, it continues to exchange heat with the water in the finned tube. The first heat exchange cavity and the second heat exchange cavity are connected by a flue gas outlet pipe. The second heat exchange cavity is connected to the flue gas outlet. The steam-water space (12) is connected to the steam outlet.

[0007] Preferably, several finned tubes are arranged in a ring on the outside of the outer cylinder.

[0008] Preferably, there are several smoke outlet pipes arranged in a ring.

[0009] Preferably, within the soda space, several round steel bars are vertically arranged and distributed in a ring around the soda space.

[0010] Preferably, the exhaust port is connected to an atmospheric pressure energy saver.

[0011] Preferably, the boiler body is placed inside the outer shell, and the inner wall of the outer shell is covered with an insulation layer.

[0012] Compared with the prior art, the beneficial effects of this utility model are:

[0013] 1. The steam generator provided by this utility model, whether the gas enters from the top or the gas enters from the bottom, optimizes the flow path of the flue gas generated after combustion in the steam generator. That is, it adopts two return passes, so that the flue gas exchanges heat with the heating surface multiple times in the steam generator, reducing heat loss and thus improving heat exchange efficiency.

[0014] 2. The steam generator provided by this utility model has a more compact structure, high utilization rate of heating surface, optimized use of internal space, improved overall thermal efficiency and reduced manufacturing cost.

[0015] 3. The steam generator provided by this utility model can reduce the accumulation of gas at the bottom or low-lying areas of the steam generator when the gas enters from above, thereby reducing safety hazards and ensuring the uniformity of gas distribution, thus further improving the heat exchange effect. Attached Figure Description

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0017] Figure 1 This is a structural schematic diagram (front view) of Embodiment 1 of the present utility model;

[0018] Figure 2 Side view of Embodiment 1 of this utility model Figure 1 ;

[0019] Figure 3 Side view of Embodiment 1 of this utility model Figure 2 ;

[0020] Figure 4 Top view of Embodiment 1 of this utility model Figure 1 ;

[0021] Figure 5 Top view of Embodiment 1 of this utility model Figure 2 ;

[0022] Figure 6 This is a schematic diagram (front view) of the boiler body according to Embodiment 1 of this utility model;

[0023] Figure 7 This is a side view of the boiler body according to Embodiment 1 of the present invention. Figure 1 ;

[0024] Figure 8 This is a side view of the boiler body according to Embodiment 1 of the present invention. Figure 2 ;

[0025] Figure 9 This is a top view of the boiler body according to Embodiment 1 of this utility model;

[0026] Figure 10 This is a schematic diagram of the connection structure between the outer cylinder and the inner cylinder in Embodiment 1 of this utility model;

[0027] Figure 11 for Figure 10 Sectional view along line A-A in the middle;

[0028] Figure 12 for Figure 10 Sectional view along line B-B in the middle;

[0029] Figure 13 This is a schematic diagram of the flue gas flow direction in Embodiment 1 of this utility model;

[0030] Figure 14 This is a structural schematic diagram (front view) of Embodiment 2 of the present invention;

[0031] Figure 15 This is a side view of Embodiment 2 of the present invention;

[0032] Figure 16 Top view of Embodiment 2 of this utility model Figure 1 ;

[0033] Figure 17 Top view of Embodiment 2 of this utility model Figure 2 ;

[0034] Figure 18 This is a schematic diagram (front view) of the boiler body in Embodiment 2 of this utility model;

[0035] Figure 19 This is a side view of the boiler body according to Embodiment 2 of this utility model;

[0036] Figure 20 This is a top view of the boiler body according to Embodiment 2 of this utility model;

[0037] Figure 21 This is a schematic diagram of the connection structure between the outer cylinder and the inner cylinder in Embodiment 2 of this utility model;

[0038] Figure 22 for Figure 10 Sectional view along line A-A in the middle;

[0039] Figure 23 for Figure 10 Sectional view along line B-B in the middle;

[0040] Figure 24 This is a schematic diagram of the flue gas flow direction in Embodiment 2 of this utility model;

[0041] In the diagram: 1. Boiler body; 2. Burner; 3. Explosion-proof door; 4. Atmospheric pressure economizer; 5. Smoke baffle shell; 6. Valve and instrument connection pipe; 7. Instrument valve; 8. Base; 9. Insulation layer; 10. Outer shell; 11. Burner interface; 12. Steam-water space; 13. Finned tube; 14. Lower sealing plate; 15. Steam outlet water level assembly; 16. Sewage pipe seat; 17. Water supply pipe seat; 18. Safety valve seat; 19. Explosion-proof door seat; 20. Main steam valve seat.

[0042] Blocking plate 1-1, outer cylinder 1-2, inner cylinder 1-3, round steel 1-4, smoke outlet pipe 1-5. Detailed Implementation

[0043] This section will describe in detail the specific embodiments of this utility model.

[0044] Example 1

[0045] like Figures 1 to 13 The high-efficiency gas-fired steam generator shown includes a boiler body 1, a heat exchange chamber inside the boiler body 1, a steam outlet and a flue gas outlet leading out from the boiler body 1, and a burner 2 installed on the top of the boiler body 1. Gas enters the heat exchange chamber from above and is burned and undergoes heat exchange.

[0046] An explosion-proof door 3, a steam outlet water level assembly 15, and an instrument valve 7 connected to the steam outlet water level assembly 15 via a valve instrument connection pipe 6 are also connected to the boiler body 1.

[0047] Furthermore, in the boiler body 1, the outer cylinder 1-2 and the inner cylinder 1-3 form a closed steam-water space 12. The upper part of the steam-water space 12 is connected to the steam outlet, and the lower part of the steam-water space 12 is connected to the water supply pipe seat 17 and the drain pipe seat 16 through pipelines. The internal cavity of the inner cylinder 1-3 serves as the first heat exchange cavity. The top of the first heat exchange cavity is connected to the burner 2 through the burner interface 11, and the bottom of the first heat exchange cavity is provided with a lower sealing plate 14 that serves as a seal. When the flue gas generated by the combustion of the gas passes through the first heat exchange cavity, it exchanges heat with the steam-water space 12 between the outer cylinder 1-2 and the inner cylinder 1-3.

[0048] Furthermore, finned tubes 13 are welded to the upper and lower sides of the outer cylinder 1-2. The finned tubes 13 are arranged vertically and their upper and lower ends are connected to the steam-water space 12 respectively. A smoke-blocking shell 5 is covered on the outside of the finned tubes 13. The internal cavity of the smoke-blocking shell 5 serves as a second heat exchange cavity. The flue gas generated by the combustion of the gas continues to exchange heat with the water in the finned tubes 13 when it passes through the second heat exchange cavity.

[0049] Furthermore, the first heat exchange chamber and the second heat exchange chamber are connected by a flue pipe 1-5 at the bottom; the flue pipe 1-5 serves as a connecting channel between the first and second return cycles of the flue gas, ensuring smooth circulation of the flue gas within the steam generator; the second heat exchange chamber is connected to the exhaust port, and an atmospheric pressure energy saver 4 is connected at the exhaust port.

[0050] Furthermore, several finned tubes 13 are arranged in a ring at equal intervals on the outside of the outer cylinder 1-2.

[0051] Furthermore, the smoke outlet pipes 1-5 are multiple and arranged in a ring at equal intervals.

[0052] Furthermore, within the steam-water space 12, several round steel bars 1-4 are vertically arranged and distributed in a ring around the water space 12. Their main function is to reduce the water volume, thereby optimizing the heat exchange process and improving thermal efficiency.

[0053] Preferably, the boiler body 1 is placed inside the outer shell 10, and the inner wall of the outer shell 10 is attached with a heat insulation layer 9 to effectively reduce heat loss.

[0054] Example 2

[0055] like Figures 14 to 24 The high-efficiency gas-fired steam generator shown includes a boiler body 1, a heat exchange chamber inside the boiler body 1, a steam outlet and a flue gas outlet leading out from the boiler body 1, and a burner 2 installed at the bottom of the boiler body 1. Gas enters the heat exchange chamber from below and is burned and undergoes heat exchange.

[0056] An explosion-proof door 3, a water level gauge, and an instrument valve 7 are also connected to the boiler body 1.

[0057] Furthermore, in the boiler body 1, the outer cylinder 1-2 and the inner cylinder 1-3 form a closed steam-water space 12. The upper part of the water space 12 is connected to the steam outlet, and the lower part of the steam-water space 12 is connected to the water supply pipe seat 17 and the drain pipe seat 16 through pipelines. The internal cavity of the inner cylinder 1-3 serves as the first heat exchange cavity. The bottom of the first heat exchange cavity is connected to the burner 2 through the burner interface 11. The top of the first heat exchange cavity is provided with an upper sealing plate that serves as a seal. When the flue gas generated by the combustion of the gas passes through the first heat exchange cavity, it exchanges heat with the steam-water space 12 between the outer cylinder 1-2 and the inner cylinder 1-3.

[0058] Furthermore, finned tubes 13 are welded to the upper and lower sides of the outer cylinder 1-2. The finned tubes 13 are arranged vertically and their upper and lower ends are connected to the steam-water space 12 respectively. A smoke-blocking shell 5 is covered on the outside of the finned tubes 13. The internal cavity of the smoke-blocking shell 5 serves as a second heat exchange cavity. The flue gas generated by the combustion of the gas continues to exchange heat with the water in the finned tubes 13 when it passes through the second heat exchange cavity.

[0059] Furthermore, the first heat exchange chamber and the second heat exchange chamber are connected by a flue pipe 1-5 provided in the middle or at the top; the flue pipe 1-5 serves as a connecting channel between the first and second return cycles of flue gas, ensuring smooth circulation of flue gas within the steam generator; the second heat exchange chamber is connected to the exhaust port, and an atmospheric pressure energy saver 4 is connected at the exhaust port.

[0060] Furthermore, several finned tubes 13 are arranged in a ring at equal intervals on the outside of the outer cylinder 1-2.

[0061] Furthermore, the smoke outlet pipes 1-5 are multiple and arranged in a ring at equal intervals.

[0062] Preferably, the boiler body 1 is placed inside the outer shell 10, and the inner wall of the outer shell 10 is attached with a heat insulation layer 9 to effectively reduce heat loss.

[0063] The two embodiments provided by this utility model mainly involve the following steps in the heat exchange process:

[0064] 1. Flue Gas Flow and Heat Exchange: The high-temperature flue gas generated after combustion first enters the first heat exchange chamber, where it exchanges heat with the steam-water space between the outer and inner cylinders, achieving the first pass of the flue gas. At this time, the flue gas transfers heat to the medium in the steam-water space, causing the temperature of the steam-water mixture to gradually increase. Subsequently, the flue gas enters the second heat exchange chamber through flue gas outlet pipes 1-5, achieving the second pass of the flue gas, and continues to exchange heat with the water in the finned tubes. The design of multiple finned tubes 13 increases the heat exchange area and improves the heat exchange efficiency.

[0065] 2. Water heating and steam generation: During the heat exchange process between flue gas and water, the water gradually heats up and partially evaporates into steam; especially in the finned tube 13, due to the increase in heat exchange area, the water heats up faster and the steam generation efficiency is higher; as steam is generated, the pressure in the steam generator gradually increases; when the pressure reaches the set value, the steam can be output through the steam outlet for use.

[0066] 3. Thermal efficiency and energy utilization: The design of the first and second flue gas return paths ensures sufficient heat exchange of flue gas in the steam generator, improving thermal efficiency; at the same time, by reducing water volume and optimizing finned tube structure, energy consumption and manufacturing costs are further reduced.

[0067] In summary, this utility model ensures the efficient and stable operation of the steam generator through reasonable connection design and optimized workflow.

Claims

1. A high-efficiency gas-fired steam generator, comprising a boiler body (1), having a heat exchange chamber inside the boiler body (1), and a steam outlet and a flue gas outlet leading out from the boiler body (1), characterized in that: A burner (2) is installed at the top or bottom of the boiler body (1), and the gas enters the heat exchange chamber from above or below for combustion and heat exchange.

2. The high-efficiency gas-fired steam generator according to claim 1, characterized in that: In the boiler body (1), an enclosed steam-water space (12) is formed between the outer cylinder (1-2) and the inner cylinder (1-3). The internal cavity of the inner cylinder (1-3) serves as the first heat exchange cavity. When the flue gas generated by the combustion of the gas passes through the first heat exchange cavity, it exchanges heat with the steam-water space (12) between the outer cylinder (1-2) and the inner cylinder (1-3). Finned tubes (13) are welded to the upper and lower sides of the outer cylinder (1-2). The finned tubes (13) are vertically arranged and their upper and lower ends are connected to the distribution... The steam-water space (12) is connected to the finned tube (13). A smoke-blocking shell (5) is provided on the outside of the finned tube (13). The internal cavity of the smoke-blocking shell (5) serves as a second heat exchange cavity. The flue gas generated by the combustion of the gas continues to exchange heat with the water in the finned tube (13) when it passes through the second heat exchange cavity. The first heat exchange cavity and the second heat exchange cavity are connected by a smoke outlet pipe (1-5). The second heat exchange cavity is connected to the exhaust port. The steam-water space (12) is connected to the steam outlet.

3. The high-efficiency gas-fired steam generator according to claim 2, characterized in that: Several finned tubes (13) are arranged in a ring on the outside of the outer cylinder (1-2).

4. The high-efficiency gas-fired steam generator according to claim 2, characterized in that: Several smoke outlet pipes (1-5) are arranged in a ring.

5. The high-efficiency gas-fired steam generator according to claim 2, characterized in that: Within the steam-water space (12), several round steel bars (1-4) are vertically arranged and distributed in a ring around the steam-water space (12).

6. The high-efficiency gas-fired steam generator according to claim 1, characterized in that: The exhaust port is connected to the atmospheric pressure energy saver (4).

7. The high-efficiency gas-fired steam generator according to claim 1, characterized in that: The boiler body (1) is placed inside the outer shell (10), and the inner wall of the outer shell (10) is covered with a heat insulation layer (9).

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