Fully premixed fuel gas steam generator
Through the innovative design of a fully premixed gas steam generator, the combined structure of the heat conduction pipe and water vapor separation plate is used to optimize the condenser fins and overflow pipes, the problems of insufficient heat exchange area and excessive water volume of the existing gas steam generators are solved, and more efficient steam production and lower environmental pollution are achieved.
Patent Information
- Application Number
- CN202510391105.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-31
- Publication Date
- 2025-07-29
AI Technical Summary
The heat exchange area of existing gas steam generators is not large enough, the water volume is too large, the steam production is not enough, and the steam dryness is not enough.
The fully premixed gas steam generator design is adopted, including a shell, an electric box, a low-nitrogen burner, a condenser, a supply pump and a furnace body. The heat exchange area is increased through the combined structure of the heat conduction pipe, a water vapor separation plate and a boiling plate, and the water circulation is optimized through the finned pipe and overflow pipe of the condenser to achieve efficient steam production.
It achieves a larger heat exchange area, smaller water volume, more steam production and higher steam dryness, while reducing environmental pollution, improving the thermal energy efficiency of steam and the stability of equipment.
Smart Images
Figure CN120385067A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the related technical field of steam generators, and in particular to a fully premixed gas steam generator. Background Art
[0002] Principle of gas steam generator: Gas combustion generates heat energy, which heats the water in the boiler to turn it into steam. The heat released by the steam is absorbed again, and the cycle of heating and generating high-temperature and high-pressure steam continues. The main components of a gas steam generator include a boiler body, a boiler control system, inlet and outlet pipes, etc. Steam has a great role and is widely used in various industrial and domestic places. The fully premixed low-nitrogen condensing steam generator not only saves manpower but also improves the efficiency of industrial production. With the aggravation of environmental pollution and the implementation of policies, the pollution caused by ordinary gas and coal as fuels is too large, and they are gradually abandoned by various industries. Since the fuel used in a once-through boiler is natural gas or liquefied gas, its thermal efficiency is relatively high and the sealing is good. The once-through boiler makes the entire flue gas passage concentrated inside the boiler body, so the sealing performance and safety performance are better. Except for environmental protection issues, the heat transfer area of the existing once-through boiler gas steam generator is not large enough, the water volume is too large, the steam production is insufficient, and the steam dryness is also insufficient. Summary of the Invention
[0003] The present invention aims to overcome the deficiencies in the prior art, such as insufficient heat transfer area, too large water volume, insufficient steam production, and insufficient steam dryness, and provides a fully premixed gas steam generator with a larger heat transfer area, a smaller water volume, more steam production, and higher steam dryness.
[0004] In order to achieve the above object, the present invention adopts the following technical solutions: A fully premixed gas steam generator, comprising a housing, an electrical box, a low-nitrogen burner, a condenser, a make-up pump and a furnace body. The electrical box, the low-nitrogen burner, the condenser, the make-up pump and the furnace body are all placed inside the housing and connected to the housing. The electrical box is respectively connected to the low-nitrogen burner, the condenser, the make-up pump and the furnace body. The condenser is respectively connected to the make-up pump and the furnace body. The low-nitrogen burner is placed below the furnace body and connected to the furnace body. The low-nitrogen burner is provided with a burner pipe. The lower end of the burner pipe is fixedly connected to the low-nitrogen burner. The upper end of the burner pipe passes through the lower end surface of the furnace body and is placed inside the furnace body. The burner pipe is connected to the lower end surface of the furnace body. Inside the furnace body, there are heat conduction pipes and a water-vapor separation plate. There are several heat conduction pipes, which are evenly distributed inside the furnace body with the burner pipe as the center. The lower end of the heat conduction pipe is fixedly connected to the lower end surface inside the furnace body. A boiling prevention plate is provided on the upper end surface of the heat conduction pipe. The lower end surface of the boiling prevention plate is fixedly connected to the upper end surface of the heat conduction pipe. There are two water-vapor separation plates. The shape of one water-vapor separation plate is annular and perpendicular to the upper end surface of the heat conduction plate. The lower end surface of the water-vapor separation plate perpendicular to the heat conduction pipe is connected to the upper end surface of the heat conduction pipe. The boiling prevention plate is placed inside the water-vapor separation plate. The shape of one water-vapor separation plate is annular and perpendicular to the upper end surface of the other water-vapor separation plate. The two water-vapor separation plates are connected.
[0005] During installation, first pass the water connection pipe of the make-up pump through the housing and connect it to the water pipe. Then connect the low-nitrogen burner to natural gas and power on the electrical box. When in use, the make-up pump transports water into the condenser and then into the furnace body. The furnace body is the main part for steam generation, mainly composed of heat conduction pipes, water-vapor separation plates, boiling prevention plates, burner pipes, etc. When the heat energy released by the low-nitrogen burner through the burner pipe heats the furnace water in the heat conduction pipes, the water forms steam under high temperature and high pressure. The steam becomes drier after being filtered by the two water-vapor separation plates and the boiling prevention plate. The steam is sent to external equipment or systems to provide the required heat or power. Some steam also enters the condenser for liquefaction. The liquefied water can re-enter the furnace body for liquefaction again. In this way, through repeated utilization, the practical efficiency of the steam heat is higher. With several heat conduction pipes, the heat exchange area is greatly increased, and the water volume does not need to be so large. The reflux of the condenser can also generate more steam under the same water volume, achieving the purpose of a larger heat exchange area, a smaller water volume, a larger steam production capacity, and a higher steam dryness.
[0006] Preferably, a water inlet pipe and a connecting pipe are provided on the supply pump. One end of the water inlet pipe is connected to the supply pump, and the other end of the water inlet pipe passes through the outer shell and is located outside the outer shell. One end of the connecting pipe is connected to the supply pump, and the other end of the connecting pipe is connected to the condenser. An overflow pipe and an exhaust pipe are provided on the condenser. One end of the overflow pipe is connected to the condenser, and the other end of the overflow pipe passes through the outer shell and is located outside the outer shell. One end of the exhaust pipe is connected to the condenser, and the other end of the exhaust pipe passes through the outer shell and is located outside the outer shell. The overflow pipe facilitates the discharge of excess water in the furnace body, preventing excessive water volume and backflow.
[0007] Preferably, finned tubes are provided on the condenser. There are several finned tubes, which are respectively located on the front and rear end faces of the condenser. The shape of the finned tube is U-shaped. Both ends of the U-shaped finned tube pass through the outer side surface of the condenser and are located inside the condenser. One end of the U-shaped finned tube is connected to one end of the adjacent finned tube on the other side of the condenser. The finned tube is U-shaped, with a larger contact area, enabling higher heat transfer efficiency.
[0008] Preferably, a furnace body frame is provided inside the outer shell. The lower end face of the furnace body frame is fixedly connected to the inner bottom surface of the outer shell. The furnace body is placed on the upper end face of the furnace body frame and is fixedly connected to the upper end face of the furnace body frame. The low-nitrogen burner is located below the furnace body frame. A steam pipe is provided on the condenser, and the condenser is connected to the furnace body through the steam pipe. The furnace body frame facilitates the placement of the furnace body and the low-nitrogen burner, making the furnace body more stable.
[0009] Preferably, a gas pipe is provided on the low-nitrogen burner. One end of the gas pipe is connected to the low-nitrogen burner, and the other end of the gas pipe passes through the outer shell and is located outside the outer shell. A sewage pipe is provided on the furnace body. One end of the sewage pipe is connected to the furnace body, and the other end of the sewage pipe passes through the outer shell and is located outside the outer shell. The sewage pipe facilitates the discharge of some impurities after combustion, allowing the fuel and air to be fully mixed, reducing harmful substances generated during the combustion process, making the flue gas emission cleaner, and causing less environmental pollution.
[0010] Preferably, a safety valve and a fully premixed water level frame pipe are provided on the furnace body. One end of the safety valve is fixedly connected to the furnace body, and the other end of the safety valve passes through the outer shell and is located outside the outer shell. One end of the fully premixed water level frame pipe is connected to the safety valve, and the other end of the fully premixed water level frame pipe is connected to the sewage pipe. Both the safety valve and the fully premixed water level frame pipe are for safety considerations.
[0011] Preferably, a steam outlet valve is provided on the furnace body. One end of the steam outlet valve is fixedly connected to the furnace body, and the other end of the steam outlet valve passes through the outer shell and is located outside the outer shell. The steam outlet valve facilitates steam discharge and can control the steam output.
[0012] Preferably, a filter is provided on the housing, fixedly connected to the housing, and positioned correspondingly to the position of the low-nitrogen burner. The filter reduces the ingress of impurities from the air into the housing, reduces the impact of dust on the burner, increases the life of the burner, and enhances safety.
[0013] Preferably, the burner tube is provided with a plurality of generator blocks evenly distributed on the outer surface of the burner tube, and the generator blocks are fixedly connected to the outer surface of the burner tube. The generator blocks can increase the heating surface area of the burner tube, heat faster, and improve thermal efficiency.
[0014] Preferably, the housing is provided with an operating screen, a power indicator light, a switch, and an alarm light. These are all fixedly connected to the exterior of the housing and are respectively connected to the electrical box, the supply pump, the condenser, and the low-nitrogen burner. The operating screen, power indicator light, switch, and alarm light all facilitate operation of the machine and provide timely safety warnings, thereby reducing the impact of emergencies.
[0015] The beneficial effects of the present invention are: a larger heat exchange area, a smaller water volume, a higher steam production, and a higher steam dryness; the overflow pipe is convenient for discharging excess water in the furnace body to prevent excessive water from causing backflow; the finned tube is U-shaped, with a larger contact area, which can make the heat energy transmission efficiency higher; the furnace body frame is convenient for placing the furnace body and the low-nitrogen burner, making the furnace body more stable; the drain pipe is convenient for discharging some impurities after combustion, allowing the fuel and air to be fully mixed, reducing the harmful substances generated during the combustion process, making the flue gas emissions cleaner, and less polluting the environment; the safety valve and the full premixed water level rack pipe are both for safety considerations; the steam outlet valve is convenient for exhausting steam and can control the steam outlet volume; the filter reduces impurities in the air from entering the shell, reduces the impact of dust on the machine, increases the service life of the machine, and also enhances safety; the generator block can increase the heating surface area of the burner tube, heats faster, and has higher thermal energy efficiency; the operation screen, power display light, switch and alarm light are all convenient for operating the machine, and safety prompts can be timely, reducing the impact of emergencies. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a schematic diagram of the structure inside the shell of the present invention; Figure 3 yes Figure 2 The main view; Figure 4 yes Figure 3 AA cross-section diagram; Figure 5 yes Figure 4 An enlarged view of detail B; Figure 6 Is Figure 4 An enlarged view of Detail C.
[0017] In the figure: 1. Outer shell, 2. Electric box, 3. Low-nitrogen burner, 4. Condenser, 5. Make-up pump, 6. Furnace body, 7. Burner pipe, 8. Heat conduction pipe, 9. Water-vapor separation plate, 10. Anti-boiling plate, 11. Water inlet pipe, 12. Connecting pipe, 13. Overflow pipe, 14. Smoke exhaust pipe, 15. Finned pipe, 16. Furnace body frame, 17. Steam pipe, 18. Drain pipe, 19. Safety valve, 20. Full-premix water level frame pipe, 21. Steam outlet valve, 22. Filter, 23. Generation block, 24. Operation screen, 25. Power display lamp, 26. Switch, 27. Alarm lamp, 28. Gas pipe. Specific embodiments
[0018] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0019] As Figures 1 to 5 shown, a full-premix gas steam generator includes an outer shell 1, an electric box 2, a low-nitrogen burner 3, a condenser 4, a make-up pump 5 and a furnace body 6. The electric box 2, the low-nitrogen burner 3, the condenser 4, the make-up pump 5 and the furnace body 6 are all placed inside the outer shell 1 and connected to the outer shell 1. The electric box 2 is respectively connected to the low-nitrogen burner 3, the condenser 4, the make-up pump 5 and the furnace body 6. The condenser 4 is respectively connected to the make-up pump 5 and the furnace body 6. The low-nitrogen burner 3 is placed below the furnace body 6 and connected to the furnace body 6. The low-nitrogen burner 3 is provided with a burner pipe 7. The lower end of the burner pipe 7 is fixedly connected to the low-nitrogen burner 3. The upper end of the burner pipe 7 passes through the lower end face of the furnace body 6 and is placed inside the furnace body 6. The burner pipe 7 is connected to the lower end face of the furnace body 6. Inside the furnace body 6, there are a heat conduction pipe 8 and a water-vapor separation plate 9. There are several heat conduction pipes 8 which are evenly distributed in the furnace body 6 with the burner pipe 7 as the center. The lower end of the heat conduction pipe 8 is fixedly connected to the lower end face inside the furnace body 6. The upper end face of the heat conduction pipe 8 is provided with an anti-boiling plate 10. The lower end face of the anti-boiling plate 10 is fixedly connected to the upper end face of the heat conduction pipe 8. There are two water-vapor separation plates 9. One of the water-vapor separation plates 9 is annular and perpendicular to the upper end face of the heat conduction plate. The lower end face of the water-vapor separation plate 9 perpendicular to the heat conduction pipe 8 is connected to the upper end face of the heat conduction pipe 8. The anti-boiling plate 10 is placed inside the water-vapor separation plate 9. One of the water-vapor separation plates 9 is annular and perpendicular to the upper end face of the other water-vapor separation plate 9. The two water-vapor separation plates 9 are connected.
[0020] As Figures 2 to 4As shown in the figure, a water supply pump 5 is provided with a water inlet pipe 11 and a connecting pipe 12. One end of the water inlet pipe 11 is connected to the water supply pump 5, and the other end of the water inlet pipe 11 passes through the outer shell 1 and is placed outside the outer shell 1. One end of the connecting pipe 12 is connected to the water supply pump 5, and the other end of the connecting pipe 12 is connected to the condenser 4. The condenser 4 is provided with an overflow pipe 13 and an exhaust pipe 14. One end of the overflow pipe 13 is connected to the condenser 4, and the other end of the overflow pipe 13 passes through the outer shell 1 and is placed outside the outer shell 1. One end of the exhaust pipe 14 is connected to the condenser 4, and the other end of the exhaust pipe 14 passes through the outer shell 1 and is placed outside the outer shell 1.
[0021] As Figure 1 and Figure 2 shown in the figure, the condenser 4 is provided with finned tubes 15. There are several finned tubes 15, which are respectively placed on the front and rear end faces of the condenser 4. The shape of the finned tubes 15 is U-shaped. Both ends of the U-shaped finned tubes 15 pass through the outer side surface of the condenser 4 and are placed inside the condenser 4. One end of the U-shaped finned tubes 15 is connected to one end of the adjacent finned tubes 15 on the other side of the condenser 4.
[0022] As Figures 2 to 4 shown in the figure, a furnace body frame 16 is arranged inside the outer shell 1. The lower end surface of the furnace body frame 16 is fixedly connected to the inner bottom surface of the outer shell 1. The furnace body 6 is placed on the upper end surface of the furnace body frame 16 and is fixedly connected to the upper end surface of the furnace body frame 16. The low-nitrogen burner 3 is placed below the furnace body frame 16. The condenser 4 is provided with a steam pipe 17, and the condenser 4 is connected to the furnace body 6 through the steam pipe 17.
[0023] As Figure 2 and Figure 3 shown in the figure, the low-nitrogen burner 3 is provided with a gas pipe 28. One end of the gas pipe 28 is connected to the low-nitrogen burner 3, and the other end of the gas pipe 28 passes through the outer shell 1 and is placed outside the outer shell 1. The furnace body 6 is provided with a blowdown pipe 18. One end of the blowdown pipe 18 is connected to the furnace body 6, and the other end of the blowdown pipe 18 passes through the outer shell 1 and is placed outside the outer shell 1.
[0024] As Figures 1 to 4 shown in the figure, the furnace body 6 is provided with a safety valve 19 and a fully premixed water level pipe 20. One end of the safety valve 19 is fixedly connected to the furnace body 6, and the other end of the safety valve 19 passes through the outer shell 1 and is placed outside the outer shell 1. One end of the fully premixed water level pipe 20 is connected to the safety valve 19, and the other end of the fully premixed water level pipe 20 is connected to the blowdown pipe 18.
[0025] As Figures 1 to 4 shown in the figure, the furnace body 6 is provided with a steam outlet valve 21. One end of the steam outlet valve 21 is fixedly connected to the furnace body 6, and the other end of the steam outlet valve 21 passes through the outer shell 1 and is placed outside the outer shell 1.
[0026] As Figure 1As shown, a filter 22 is provided on the outer shell 1. The filter 22 is fixedly connected to the outer shell 1, and the position of the filter 22 corresponds to the position of the low-nitrogen burner 3.
[0027] As Figure 4 and Figure 6 shown, a generating block 23 is provided on the burner pipe 7. There are several generating blocks 23 and they are evenly distributed on the outer side surface of the burner pipe 7. The generating block 23 is fixedly connected to the outer side surface of the burner pipe 7.
[0028] As Figure 1 shown, an operation screen 24, a power display lamp 25, a switch 26 and an alarm lamp 27 are provided on the outer shell 1. The operation screen 24, the power display lamp 25, the switch 26 and the alarm lamp 27 are all fixedly connected to the outer side surface of the outer shell 1, and the operation screen 24, the power display lamp 25, the switch 26 and the alarm lamp 27 are respectively connected to the electrical box 2, the supply pump 5, the condenser 4 and the low-nitrogen burner 3.
[0029] During installation, first pass the water inlet pipe 11 of the supply pump 5 through the housing 1 and then connect it to the water pipe. Then connect the low-nitrogen burner 3 to natural gas with the gas pipe 28, power on the electrical box 2. Both the overflow pipe 13 and the sewage pipe 18 should pass through the housing 1 and be placed outside the housing 1. The exhaust hood needs to be installed 300 MM higher than the outlet of the exhaust pipe 14, such as the boat-shaped hood used in hotel kitchens. There is no need to install an exhaust fan. The water inlet tower requires the bottom to be 500 MM higher than the top of the supply pump 5 to facilitate pressurizing the water supply. The furnace body 6 is placed on the furnace body frame 16, which is convenient for installing the low-nitrogen burner 3 below and can also save space. During use, first turn on the switch 26, and the power indicator light 25 lights up. Then operate on the operation screen 24. The supply pump 5 transports water to the condenser 4 through the connecting pipe 12, and then to the furnace body 6 through the steam pipe 17. The furnace body 6 is the main part for generating steam and is mainly composed of heat conduction pipes 8, water vapor separation plates 9, anti-boiling plates 10, burner pipes 7, etc. When the heat energy released by the low-nitrogen burner 3 through the burner pipe 7 heats the furnace water in the heat conduction pipe 8, the water forms steam under high temperature and high pressure. The steam becomes drier after three-layer water vapor separation by the two water vapor separation plates 9 and the anti-boiling plate 10. The steam is sent to external equipment or systems through the steam outlet valve 21 to provide the required heat or power. Part of the steam also enters the condenser 4 and is liquefied through the finned tube 15. The liquefied water can re-enter the furnace body 6 and be liquefied again. In this way, it is recycled, and the practical efficiency of the steam heat is higher. With several heat conduction pipes 8, the heat exchange area is greatly increased, and the water volume does not need to be so large. The generating block 23 on the burner pipe 7 increases the heating area, and the steam is generated faster. The reflux of the condenser 4 can also generate more steam under the same water volume. In terms of safety, the filter 22 on the housing 1 can reduce the entry of dust, reduce the impact of dust on the machine, and extend the life of the machine. The display of the alarm light 27 can enable faults to be repaired in time and reduce hazards. The safety valve 19 and the fully premixed water level frame pipe 20 on the furnace body 6 can enable the furnace body 6 to have a certain self-regulating ability when generating steam, reduce safety problems, and achieve the purpose of a larger heat exchange area, a smaller water volume, a larger steam production volume, and a higher steam dryness.
Claims
1. A fully premixed gas steam generator, characterized in that, It includes a housing (1), an electrical box (2), a low-nitrogen burner (3), a condenser (4), a supply pump (5) and a furnace body (6). The electrical box (2), the low-nitrogen burner (3), the condenser (4), the supply pump (5) and the furnace body (6) are all placed inside the housing (1) and connected to the housing (1). The electrical box (2) is respectively connected to the low-nitrogen burner (3), the condenser (4), the supply pump (5) and the furnace body (6). The condenser (4) is respectively connected to the supply pump (5) and the furnace body (6). The low-nitrogen burner (3) is placed below the furnace body (6) and connected to the furnace body (6). A burner pipe (7) is provided on the low-nitrogen burner (3). The lower end of the burner pipe (7) is fixedly connected to the low-nitrogen burner (3). The upper end of the burner pipe (7) passes through the lower end face of the furnace body (6) and is placed inside the furnace body (6). The burner pipe (7) is connected to the lower end face of the furnace body (6). A heat conduction pipe (8) and a water-vapor separation plate (9) are provided inside the furnace body (6). There are several heat conduction pipes (8) which are evenly distributed inside the furnace body (6) with the burner pipe (7) as the center. The lower end of the heat conduction pipe (8) is fixedly connected to the lower end face inside the furnace body (6). A boiling prevention plate (10) is provided on the upper end face of the heat conduction pipe (8). The lower end face of the boiling prevention plate (10) is fixedly connected to the upper end face of the heat conduction pipe (8). There are two water-vapor separation plates (9). One of the water-vapor separation plates (9) is annular and perpendicular to the upper end face of the heat conduction plate. The lower end face of the water-vapor separation plate (9) perpendicular to the heat conduction pipe (8) is connected to the upper end face of the heat conduction pipe (8). The boiling prevention plate (10) is placed inside the water-vapor separation plate (9). One water-vapor separation plate (9) is annular and perpendicular to the upper end face of the other water-vapor separation plate (9). The two water-vapor separation plates (9) are connected.
2. The all-premixed gas steam generator according to claim 1, characterized in that, An inlet pipe (11) and a connecting pipe (12) are provided on the supply pump (5). One end of the inlet pipe (11) is communicated with the supply pump (5). The other end of the inlet pipe (11) passes through the housing (1) and is placed outside the housing (1). One end of the connecting pipe (12) is communicated with the supply pump (5). The other end of the connecting pipe (12) is communicated with the condenser (4). An overflow pipe (13) and an exhaust pipe (14) are provided on the condenser (4). One end of the overflow pipe (13) is communicated with the condenser (4). The other end of the overflow pipe (13) passes through the housing (1) and is placed outside the housing (1). One end of the exhaust pipe (14) is communicated with the condenser (4). The other end of the exhaust pipe (14) passes through the housing (1) and is placed outside the housing (1).
3. The all-premixed gas steam generator according to claim 2, characterized in that, Finned tubes (15) are provided on the condenser (4). There are several finned tubes (15) which are respectively placed on the front and rear end faces of the condenser (4). The finned tubes (15) are in a U shape. Both ends of the U shape of the finned tubes (15) pass through the outer side face of the condenser (4) and are placed inside the condenser (4). One end of the U shape of the finned tubes (15) is connected to one end of the adjacent finned tube (15) on the other side of the condenser (4).
4. A fully premixed gas steam generator according to claim 1, characterized in that, Inside the said housing (1), there is a furnace body frame (16). The lower end face of the furnace body frame (16) is fixedly connected to the inner bottom surface of the housing (1). The furnace body (6) is placed on the upper end face of the furnace body frame (16) and fixedly connected to the upper end face of the furnace body frame (16). The low-nitrogen burner (3) is placed below the furnace body frame (16). A steam pipe (17) is provided on the condenser (4), and the condenser (4) is communicated with the furnace body (6) through the steam pipe (17).
5. A fully premixed gas steam generator according to claim 4, characterized in that, A gas pipe (28) is provided on the low-nitrogen burner (3). One end of the gas pipe (28) is communicated with the low-nitrogen burner (3), and the other end of the gas pipe (28) passes through the housing (1) and is placed outside the housing (1). A blowdown pipe (18) is provided on the furnace body (6). One end of the blowdown pipe (18) is communicated with the furnace body (6), and the other end of the blowdown pipe (18) passes through the housing (1) and is placed outside the housing (1).
6. The all-premixed gas steam generator according to claim 5, characterized in that, A safety valve (19) and a fully premixed water level frame pipe (20) are provided on the furnace body (6). One end of the safety valve (19) is fixedly connected to the furnace body (6), and the other end of the safety valve (19) passes through the housing (1) and is placed outside the housing (1). One end of the fully premixed water level frame pipe (20) is connected to the safety valve (19), and the other end of the fully premixed water level frame pipe (20) is communicated with the blowdown pipe (18).
7. A fully premixed gas steam generator according to claim 6, characterized in that, An outlet steam valve (21) is provided on the furnace body (6). One end of the outlet steam valve (21) is fixedly connected to the furnace body (6), and the other end of the outlet steam valve (21) passes through the housing (1) and is placed outside the housing (1).
8. The all-premixed gas steam generator according to claim 5, characterized in that, A filter (22) is provided on the housing (1). The filter (22) is fixedly connected to the housing (1), and the position of the filter (22) corresponds to the position of the low-nitrogen burner (3).
9. The all-premixed gas steam generator according to claim 1, characterized in that, A generating block (23) is provided on the burner pipe (7). There are several generating blocks (23) and they are evenly distributed on the outer side surface of the burner pipe (7). The generating block (23) is fixedly connected to the outer side surface of the burner pipe (7).
10. A fully premixed gas steam generator according to claim 1, characterized in that, An operation screen (24), a power display lamp (25), a switch (26) and an alarm lamp (27) are provided on the housing (1). The operation screen (24), the power display lamp (25), the switch (26) and the alarm lamp (27) are all fixedly connected to the outer side surface of the housing (1). The operation screen (24), the power display lamp (25), the switch (26) and the alarm lamp (27) are respectively connected to the electrical box (2), the supply pump (5), the condenser (4) and the low-nitrogen burner (3).