Totally premixing condensing gas steam generator

Abstract

The utility model relates to steam generator technical field, and disclose full premixing condensing gas steam generator, including frequency conversion fan, the bottom surface fixedly connected with top cover of frequency conversion fan, the bottom surface fixedly connected with cast aluminium exchanger of top cover, the bottom surface fixedly connected with constant temperature protection shell of cast aluminium exchanger, the bottom surface fixedly connected with bottom water receiving tray of constant temperature protection shell, the inside of top cover is provided with high temperature flue gas reaction subassembly, the inside of constant temperature protection shell is provided with constant temperature reaction subassembly, the inside of bottom water receiving tray is provided with condensing exhaust component, this full premixing condensing gas steam generator is composed by frequency conversion fan etc., contains multiple components, cold water is gasified by spiral coil pipe heat absorption, high temperature flue gas heat exchange condenses, and its advantage has the elimination explosion risk, heat efficiency promotion 30%~50%, ultralow nitrogen low temperature flue gas, maintenance is convenient, and multiple advantages are compatible with multiple scenes.

Description

Technical Field

[0001] This utility model relates to the field of steam generator technology, specifically a fully premixed condensing gas-fired steam generator. Background Technology

[0002] In the field of steam generator technology, Chinese utility model patent CN210267177U discloses a steam generator with a viewing window descaling port. This steam generator adopts a structure design with a water tank. This design has significant drawbacks: on the one hand, the presence of the water tank leads to low heat exchange efficiency and large energy loss during heat transfer, making it difficult to meet the needs of modern industry for efficient heat energy conversion; on the other hand, the water tank structure makes the equipment manufacturing process complex, increasing production and manufacturing costs and time costs. More importantly, water tank steam generators pose safety risks. During long-term use, the water tank may cause serious accidents such as explosions due to factors such as pressure changes and water quality problems, threatening the safety of people's lives and property.

[0003] In addition, traditional steam generators also need to be improved in terms of environmental protection and energy saving performance. Their combustion process emits high levels of nitrogen oxides, which does not meet increasingly stringent environmental standards. At the same time, the exhaust gas temperature is high, and a large amount of heat energy is lost with the flue gas, resulting in low energy utilization and energy waste. As the country's requirements for safety, energy saving and environmental protection continue to increase, the limitations of traditional steam generators are becoming increasingly prominent. Therefore, we have proposed a fully premixed condensing gas-fired steam generator. Utility Model Content

[0004] (a) Technical problems to be solved

[0005] To address the shortcomings of existing technologies, this invention provides a fully premixed condensing gas-fired steam generator, which solves the aforementioned problems.

[0006] (II) Technical Solution

[0007] To achieve the above-mentioned objectives, this utility model provides the following technical solution:

[0008] A fully premixed condensing gas-fired steam generator includes a variable frequency fan. A top cover is fixedly connected to the bottom surface of the variable frequency fan. A cast aluminum heat exchanger is fixedly connected to the bottom surface of the top cover. A constant temperature protective shell is fixedly connected to the bottom surface of the cast aluminum heat exchanger. A bottom water collection tray is fixedly connected to the bottom surface of the constant temperature protective shell. A high-temperature flue gas reaction assembly is arranged inside the top cover. A constant temperature reaction assembly is arranged inside the constant temperature protective shell. A condensing exhaust assembly is arranged inside the bottom water collection tray.

[0009] Preferably, the top surface of the top cover plate is provided with a combustion fan mounting hole, and a high-temperature flue gas reaction component is provided inside the combustion fan mounting hole.

[0010] Preferably, the high-temperature flue gas reaction assembly includes a variable frequency fan and a metal fiber burner head. The metal fiber burner head is fixedly connected to the bottom surface of the variable frequency fan, and the metal fiber burner head is fixedly connected to the inner side of the mounting hole of the combustion fan.

[0011] Preferably, the constant temperature reaction assembly includes an inner spiral coil and an outer spiral coil. The outer spiral coil is fixedly connected to the inner side of the constant temperature protective shell, and the inner spiral coil is fixedly connected to the inner side of the outer spiral coil. A water inlet is provided at the bottom of the outer spiral coil, and an upper cast aluminum connecting port is provided at the top of the outer spiral coil.

[0012] Preferably, the condensing exhaust assembly includes a combustion exhaust port and an internal space partition plate. The top surface of the bottom water receiving tray is fixedly connected to the internal space partition plate, and the top surface of the internal space partition plate is fixedly connected to a constant temperature protective shell. The top surface of the internal space partition plate has equidistantly distributed air and water inlet holes. The inner side of the bottom water receiving tray is fixedly connected to the combustion exhaust port, and the inner bottom surface of the bottom water receiving tray has a condensate drain outlet.

[0013] Preferably, the inner side of the cast aluminum heat exchanger is provided with equally spaced internal coils, the top surface of the top cover is fixedly connected to a steam outlet, and the bottom of the steam outlet is connected to the internal coils.

[0014] (III) Beneficial Effects

[0015] Compared with the prior art, the advantages of this utility model are:

[0016] A fully premixed condensing gas-fired steam generator is provided, offering the following advantages:

[0017] This technical solution relates to a fully premixed condensing gas-fired steam generator, consisting of a variable frequency fan, a top cover, a cast aluminum heat exchanger, a constant temperature protective shell, and a bottom water collection tray. It includes high-temperature flue gas reaction, constant temperature reaction, and condensation exhaust components. Cold water absorbs heat through the outer and inner spiral coils before being vaporized by the variable frequency fan to generate steam. High-temperature flue gas condenses after heat exchange through the double-layer coils, ensuring full heat recovery. Its advantages include: eliminating the water tank structure and direct-heat operation to eliminate the risk of explosion; dual-zone gradient heat exchange and a 1mm pitch spiral coil design, improving thermal efficiency by 30%–50% compared to traditional equipment; fully premixed combustion combined with condensation technology to achieve ultra-low nitrogen emissions and low-temperature exhaust; modular structure for easy maintenance; automatic condensate discharge; and features safety, high efficiency, environmental friendliness, and low maintenance costs, making it suitable for various thermal energy needs. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0019] Figure 2 This is a schematic diagram showing the overall structure of this utility model disassembled;

[0020] Figure 3 This is a cross-sectional view of the overall structure of this utility model;

[0021] Figure 4 This is a schematic diagram of the overall internal structure of this utility model.

[0022] In the diagram: 1. Variable frequency fan; 2. Top cover plate; 3. Cast aluminum heat exchanger; 4. Inner spiral coil; 5. Constant temperature protective shell; 6. Bottom water tray; 7. Outer spiral coil; 8. Combustion exhaust port; 9. Steam outlet; 10. Combustion fan mounting hole; 11. Metal fiber burner head; 12. Air and water inlet; 13. Internal space partition plate; 14. Upper cast aluminum connecting port; 15. Water inlet; 16. Internal coil; 17. Condensate drain. Detailed Implementation

[0023] 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, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Please see Figure 1-4 This utility model provides a technical solution:

[0025] The fully premixed condensing gas-fired steam generator includes a variable frequency fan 1, a top cover plate 2 fixedly connected to the bottom surface of the variable frequency fan 1, a cast aluminum heat exchanger 3 fixedly connected to the bottom surface of the top cover plate 2, a constant temperature protective shell 5 fixedly connected to the bottom surface of the cast aluminum heat exchanger 3, a bottom water receiving tray 6 fixedly connected to the bottom surface of the constant temperature protective shell 5, a high temperature flue gas reaction component installed inside the top cover plate 2, a constant temperature reaction component installed inside the constant temperature protective shell 5, and a condensing exhaust component installed inside the bottom water receiving tray 6.

[0026] Furthermore, a combustion fan mounting hole 10 is provided on the top surface of the top cover plate 2, and a high-temperature flue gas reaction component is provided inside the combustion fan mounting hole 10.

[0027] Furthermore, the high-temperature flue gas reaction assembly includes a variable frequency fan 1 and a metal fiber burner head 11. The metal fiber burner head 11 is fixedly connected to the bottom surface of the variable frequency fan 1, and the metal fiber burner head 11 is fixedly connected to the inner side of the combustion fan mounting hole 10.

[0028] Furthermore, the constant temperature reaction assembly includes an inner spiral coil 4 and an outer spiral coil 7. The outer spiral coil 7 is fixedly connected to the inner side of the constant temperature protective shell 5, and the inner spiral coil 4 is fixedly connected to the inner side of the outer spiral coil 7. A water inlet 15 is opened at the bottom of the outer spiral coil 7, and an upper cast aluminum connecting port 14 is opened at the top of the outer spiral coil 7.

[0029] Furthermore, the condensing exhaust assembly includes a combustion exhaust port 8 and an internal space partition plate 13. The top surface of the bottom water receiving tray 6 is fixedly connected to the internal space partition plate 13, and the top surface of the internal space partition plate 13 is fixedly connected to a constant temperature protective shell 5. The top surface of the internal space partition plate 13 is provided with equidistantly distributed air inlet and water outlet holes 12. The internal side of the bottom water receiving tray 6 is fixedly connected to the combustion exhaust port 8, and the internal bottom surface of the bottom water receiving tray 6 is provided with a condensate drain outlet 17.

[0030] Furthermore, the inner side of the cast aluminum heat exchanger 3 is provided with equally spaced internal coils 16, and the top surface of the top cover plate 2 is fixedly connected to a steam outlet 9, the bottom of which is connected to the internal coils 16.

[0031] Structural Description:

[0032] Variable frequency fan 1: As the core heat exchange component, the bottom surface is fixedly connected to the top cover plate 2, and the inside contains a metal fiber burner head 11 to form a high-temperature gasification zone for gasifying high-temperature hot water into steam.

[0033] Top cover plate 2: The top surface has a combustion fan mounting hole 10, the inner side is equipped with a high temperature flue gas reaction assembly, and the bottom surface is fixedly connected to the cast aluminum exchanger 3. It is used to install the high temperature flue gas reaction assembly and support the upper structure.

[0034] Cast aluminum heat exchanger 3: The top surface is fixed to the top cover plate 2, the bottom surface is connected to the constant temperature protective shell 5, and the inner side is opened with equally distributed channels 16, which are connected to the bottom of the steam outlet 9 to guide the flow of high temperature flue gas and provide protection.

[0035] Thermostatic protective shell 5: The top surface is fixed to the cast aluminum heat exchanger 3, the bottom surface is connected to the bottom water receiving tray 6, and the inner spiral coil 4 and outer spiral coil 7 are set on the inner side to form a medium and low temperature heat exchange area for cold water heat absorption and flue gas cooling.

[0036] Bottom water tray 6: The top surface is fixed with an internal space partition plate 13, and the inner side is equipped with a condensation exhaust component for collecting flue gas condensate and discharging it through the combustion exhaust port 8 and the condensate drain port 17.

[0037] High-temperature flue gas reaction assembly: includes a variable frequency fan 1 and a metal fiber burner head 11. The metal fiber burner head 11 is fixed inside the combustion fan mounting hole 10 and is used for heat exchange between high-temperature flue gas and hot water.

[0038] The constant temperature reaction component consists of an inner spiral coil 4 and an outer spiral coil 7. The outer spiral coil 7 has a water inlet 15 at the bottom and an upper cast aluminum connecting port 14 at the top, which is used for cold water to absorb heat from medium and low temperature flue gas in sequence to raise the temperature.

[0039] Condensing exhaust assembly: includes an internal space partition plate 13 and a combustion exhaust port 8. The top surface of the internal space partition plate 13 has a side connecting hole 12 for condensate to flow into the bottom water receiving tray 6 and be discharged through the combustion exhaust port 8 and the condensate drain port 17.

[0040] Steam outlet 9: fixed to the top surface of the top cover plate 2, and connected to the inner channel 16 of the cast aluminum exchanger 3 at the bottom, for discharging steam;

[0041] Metal fiber burner head 11: fixed to the bottom surface of the variable frequency fan 1 and the inside of the combustion fan mounting hole 10;

[0042] Inner spiral coil 4: Located inside the outer spiral coil 7, it together with the outer spiral coil 7 forms a constant temperature reaction component, used for hot water to absorb heat from high-temperature flue gas;

[0043] Outer spiral coil 7: Fixed inside the constant temperature protective shell 5, with cold water connected to the bottom inlet 15 and high-temperature hot water output from the top cast aluminum connecting port 14, used for initial heat absorption and temperature rise of cold water;

[0044] Internal space partition 13: fixed to the top surface of the bottom water tray 6, with a side connecting hole 12 on the top surface to support the constant temperature protective shell 5 and guide condensate into the bottom water tray 6;

[0045] Combustion exhaust port 8: Fixed inside the bottom water receiving tray 6, and cooperates with the internal space partition plate 13 for automatic discharge of combustion exhaust gas;

[0046] Combustion fan mounting hole 10: opened on the top surface of the top cover plate 2, with a metal fiber burner head 11 fixed inside for installing high-temperature flue gas reaction components;

[0047] Side connecting holes 12: equidistantly distributed on the top surface of the internal space partition plate 13, used for condensate to flow from the constant temperature protective shell 5 into the bottom water receiving tray 6;

[0048] Inlet 15: Located at the bottom of the outer spiral coil 7, used for connecting cold water;

[0049] Upper cast aluminum connecting port 14: Located at the top of the outer spiral coil 7, used to connect to the interior of the upper cast aluminum;

[0050] Working principle: When this utility model is needed, natural gas is fully mixed with air through a premixer, and then sent by a variable frequency fan 1 into the metal fiber burner head 11 inside the combustion fan mounting hole 10 of the top cover plate 2, and sprayed into the combustion chamber of the high-temperature flue gas reaction component. The high-pressure ignition needle ignites the mixed gas, forming a stable combustion flame and generating high-temperature flue gas. The high-temperature flue gas generated by combustion first heats the internal coil 16 in the cast aluminum heat exchanger 3. Cold water absorbs heat through the outer spiral coil 7 and the inner spiral coil 4, becoming high-temperature hot water that enters the cast aluminum heat exchanger. The aluminum heat exchanger 3 rapidly vaporizes into steam under the action of high-temperature flue gas and is discharged through the steam outlet 9 of the top cover 2. During this process, the cast aluminum heat exchanger 3 rapidly transfers heat through metal heat conduction, forming a high-temperature vaporization zone that directly converts hot water into steam. This eliminates the traditional water tank structure and the risk of explosion. The high-temperature flue gas flows downward from the cast aluminum heat exchanger 3 into the constant-temperature protective shell 5, first contacting the inner spiral coil 4. The high-temperature hot water in the coil absorbs the heat from the flue gas from the outer spiral coil, further heating it to near the vaporization temperature. As the temperature drops to 200-300℃, the flue gas enters the outer spiral coil 7 area. There, the medium-temperature flue gas exchanges heat with the cold water inside the outer spiral coil 7. After absorbing the low-temperature heat from the flue gas, the cold water's temperature rises to 60-80℃. It then flows into the inner spiral coil 4 through the upper cast aluminum connecting port 14, where the flue gas temperature further drops to 50-80℃ before entering the condensing exhaust assembly. Simultaneously, the distance between the inner and outer spiral coils is only 1 mm, forming a dense heat exchange surface. Combined with the spiral direction of the coils, this extends the flue gas residence time, allowing the heat to be fully absorbed by the cold water, resulting in higher thermal efficiency compared to traditional designs. The air intake is increased by 30% to 50%. The low-temperature flue gas enters the condensation and exhaust assembly of the bottom water receiving pan 6. The water vapor in the flue gas condenses into liquid water upon cooling and drips onto the internal space partition plate 13. It then flows into the bottom water receiving pan 6 through the equally spaced air intake and water supply holes 12 and is finally automatically discharged from the condensate drain outlet 17. The condensed low-temperature exhaust gas is discharged outdoors through the combustion exhaust outlet 8. The oxygen sensor on the flue pipe monitors the oxygen content of the exhaust gas in real time and feeds it back to the control board to adjust the air input of the variable frequency fan 1, ensuring accurate air-fuel ratio and achieving ultra-low nitrogen emissions.

[0051] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A fully premixed condensing gas-fired steam generator, including a variable frequency fan (1), characterized in that: The bottom surface of the variable frequency fan (1) is fixedly connected to a top cover plate (2), the bottom surface of the top cover plate (2) is fixedly connected to a cast aluminum exchanger (3), the bottom surface of the cast aluminum exchanger (3) is fixedly connected to a constant temperature protective shell (5), the bottom surface of the constant temperature protective shell (5) is fixedly connected to a bottom water receiving tray (6), a high temperature flue gas reaction component is provided on the inside of the top cover plate (2), a constant temperature reaction component is provided on the inside of the constant temperature protective shell (5), and a condensate exhaust component is provided on the inside of the bottom water receiving tray (6).

2. The fully premixed condensing gas-fired steam generator according to claim 1, characterized in that: The top surface of the top cover plate (2) is provided with a combustion fan mounting hole (10), and a high-temperature flue gas reaction component is provided inside the combustion fan mounting hole (10).

3. The fully premixed condensing gas-fired steam generator according to claim 2, characterized in that: The high-temperature flue gas reaction assembly includes a variable frequency fan (1) and a metal fiber burner (11). The bottom surface of the variable frequency fan (1) is fixedly connected to the metal fiber burner (11), and the inner side of the combustion fan mounting hole (10) is fixedly connected to the metal fiber burner (11).

4. The fully premixed condensing gas-fired steam generator according to claim 1, characterized in that: The constant temperature reaction assembly includes an inner spiral coil (4) and an outer spiral coil (7). The outer spiral coil (7) is fixedly connected to the inner side of the constant temperature protective shell (5). The inner spiral coil (4) is fixedly connected to the inner side of the outer spiral coil (7). A water inlet (15) is provided at the bottom of the outer spiral coil (7). An upper cast aluminum connecting port (14) is provided at the top of the outer spiral coil (7).

5. The fully premixed condensing gas-fired steam generator according to claim 1, characterized in that: The condensing exhaust assembly includes a combustion exhaust port (8) and an internal space partition plate (13). The top surface of the bottom water receiving tray (6) is fixedly connected to the internal space partition plate (13). The top surface of the internal space partition plate (13) is fixedly connected to a constant temperature protective shell (5). The top surface of the internal space partition plate (13) is provided with equidistantly distributed air and water inlet holes (12). The inner side of the bottom water receiving tray (6) is fixedly connected to the combustion exhaust port (8). The bottom surface of the bottom water receiving tray (6) is provided with a condensate drain outlet (17).

6. The fully premixed condensing gas-fired steam generator according to claim 1, characterized in that: The cast aluminum exchanger (3) has an internal coil (16) that is evenly distributed on its inner side. The top surface of the top cover (2) is fixedly connected to a steam outlet (9), and the bottom of the steam outlet (9) is connected to the internal coil (16).

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