Integrated circulating hot water boiler

Abstract

The invention discloses an integrated circulating type hot water boiler, which relates to the technical field of hot water boilers, and comprises a boiler cylinder, a combustor is arranged on the side part of the boiler cylinder, a corrugated fire pipe is arranged in the boiler cylinder, chimney pipelines are uniformly arranged outside the corrugated fire pipe, and a flue pipe is arranged above the side of the boiler cylinder. An airflow balancing assembly is arranged between the combustor and the corrugated fire tube and comprises an outer spiral barrel and an inner straight flow barrel, so that flame airflow output by the combustor flows into the corrugated fire tube in an outer spiral and inner straight composite mode. Flame diffusion caused by turbulent flow is avoided; the outer layer spiral flow endows the flame with the rotation characteristic through the bent track and the rotational flow piece, fuel and air are mixed more sufficiently, the stability of the core temperature of the flame can be guaranteed through combination of the fuel and the air, the combustion intensity of the edge area can be enhanced through the outer layer rotational flow, and therefore the overall combustion efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of hot water boilers, and in particular to an integrated circulating hot water boiler. Background Art

[0002] The integrated circulating hot water boiler is a highly efficient and energy-saving hot water supply equipment. It adopts a closed circulation system design and integrates heating, water storage and circulation functions. Its core feature is the rapid circulation of hot water through the built-in circulation pump, which reduces heat loss in the pipeline and ensures stable outlet water temperature. The equipment also has multiple safety protection functions, such as anti-dry burning and over-temperature alarm. It is reliable in operation and easy to maintain. In the field of oil extraction and processing, the boiler can be used for key links such as wellhead heating and oil pipeline insulation, which is of great significance to ensuring the continuity and safety of oil production.

[0003] In oil production and processing, hot water boilers serve as core thermal energy conversion equipment. The shortcomings of their combustion and heat exchange technology significantly impact production: 1. Compared to existing hot water boilers, existing boilers rely on high-efficiency burners to achieve heat conversion through combustion of a fuel-air mixture, utilizing furnace radiation and convection heat exchange in tube bundles. However, this conflicts with the precise control of heat energy required in oil production and processing. The burners utilize a direct jet angle aligned with the axis of the fire tube. When the flame rapidly flows into the fire tube in a direct jet, the internal space of the fire tube suddenly increases compared to the burner outlet. According to the principles of fluid mechanics, this leads to turbulent airflow. Furthermore, direct jet flow lacks a flame restraint or guide structure, making it easy for the flame to disperse and difficult to maintain a stable columnar flow pattern. This results in uneven contact between the flame and the inner wall of the fire tube. In processes such as associated gas recovery and heating in oil production and waste heat utilization in refining units, the metal on the boiler's heating surface (such as heat-resistant alloy steel) experiences uneven thermal stress due to localized high-temperature erosion. Similar to fatigue damage to oil pipes under high-pressure and variable-temperature conditions, the pipe wall is prone to creep, bulging, and even bursting, directly impacting the continuous supply of heat energy for oil processing.

[0004] In addition, flame dispersion may also cause incomplete combustion, increase fuel consumption and pollutant emissions. Existing burners are designed with a fixed air-fuel ratio, but the composition of petroleum associated gas is complex and the calorific value fluctuates greatly. The fixed ratio will cause incomplete combustion, similar to the catalytic cracking unit in a refinery causing reaction imbalance due to fluctuations in feed properties, reducing the thermal efficiency of the boiler and exceeding the emission standard of unburned materials. These defects directly restrict the energy utilization efficiency and production safety in oil extraction and processing.

[0005] 2. At the same time, the existing technology achieves symmetrical flue gas discharge by aligning the flame injection direction of the burner with the axis of the fire tube, combined with the structure of equidistant distribution of the chimney pipes. However, due to the natural upward flow characteristic of hot air (hot air has a lower density than cold air and rises spontaneously under the action of buoyancy), the upper chimney is more likely to inhale flue gas when the flue gas discharged from the corrugated fire tube enters the chimney pipe due to its advantageous position. At the same time, the lack of active guidance and balancing structure for the flue gas flow cannot overcome the flow rate differences caused by the rising hot air, making it difficult to achieve uniform air intake in each chimney.

[0006] The inability of flue gas to enter the chimney pipe evenly will cause some chimneys to be overloaded, local wear to increase, and shorten the service life of the chimney; the underutilized lower chimney will lead to reduced exhaust efficiency, increased boiler back pressure, and affect combustion stability; uneven flue gas distribution will also lead to reduced heat recovery efficiency and energy waste; in addition, long-term asymmetric airflow scouring may cause stress concentration at the connection between the fire tube and the chimney, increase the risk of equipment failure, and increase maintenance costs and downtime frequency.

[0007] In view of this, the present invention proposes an integrated circulating hot water boiler to remedy and improve the deficiencies of the prior art. Summary of the Invention

[0008] In order to solve the above technical problems, the present invention provides an integrated circulating hot water boiler to solve the technical problems raised in the above background technology.

[0009] To achieve the above objectives, the technical solution adopted in the present invention is: an integrated circulating hot water boiler, comprising a boiler barrel, a burner is installed on the side of the boiler barrel, a corrugated fire tube is installed inside the boiler barrel, a chimney pipe is evenly installed on the outside of the corrugated fire tube, a flue pipe is installed on the upper side of the boiler barrel, an airflow balancing component is arranged between the burner and the corrugated fire tube, and the airflow balancing component comprises an outer spiral barrel and an inner straight barrel, the burner, outer spiral barrel, inner straight barrel and corrugated fire tube are in the same horizontal plane, and the output end of the burner is aligned with the axial center line of the outer spiral barrel, inner straight barrel and corrugated fire tube, the inner straight barrel is located inside the outer spiral barrel, and the flame airflow output from the output end of the burner passes through the outer spiral barrel and the inner straight barrel and is output, and will flow in a composite manner of outward rotation and inner straightness, thereby ensuring the stability of the flame airflow output.

[0010] Furthermore, the airflow balancing component also includes a separation shell. When the flame airflow output by the burner contacts the side wall of the corrugated fire tube, it will bend back in a symmetrical form to form a return flame and gradually generate high-temperature flue gas. The high-temperature flue gas balances the flow difference caused by the rising characteristics of hot air under the guide limit of the separation shell, thereby avoiding the distribution problem of more flue gas at the top and less at the bottom, until the flue gas flows into the inside of the chimney pipe and is discharged from the flue pipe position.

[0011] Furthermore, the outer spiral cylinder is sleeved on the outer wall of the burner output shaft end, the inner wall of the outer spiral cylinder is fixedly connected with a curved track, the curved track is spiral-shaped as a whole, and a swirl component is installed inside the output end of the outer spiral cylinder.

[0012] Furthermore, the swirl member as a whole is composed of a combination of a plurality of inclined sector-shaped pieces and a connecting ring, and the outer spiral cylinder and the inner straight-flow cylinder are movably connected through the swirl member.

[0013] Furthermore, the inner straight flow cylinder is located at the inner axial center position of the outer spiral cylinder, and the inner side wall of the inner straight flow cylinder is evenly fixedly connected with guide plates, the guide plates are all isosceles triangles, and the tips of the guide plates are close to each other.

[0014] Furthermore, the outer wall of the outer spiral cylinder is movably connected to an assembly bracket, and the end of the assembly bracket away from the outer spiral cylinder is fixedly connected to a separation shell, and the separation shell is located in the spacing area formed between the burner and the corrugated fire tube inside the boiler cylinder.

[0015] Furthermore, the separation shell is funnel-shaped as a whole, with the narrow end of the separation shell close to the corrugated fire tube and the wide end close to the burner. The outer wall of the separation shell is evenly fixedly connected with an isolation layer, and the isolation layer is located between every two adjacent chimney pipes.

[0016] Furthermore, a filling base is installed in the interval area between the corrugated fire tube and the chimney pipe, and the filling base is semicircularly wrapped around the side of the chimney pipe close to the corrugated fire tube.

[0017] Furthermore, a heat-conducting shaft is slidably connected to the interior of the filling base, the heat-conducting shaft is made of boron nitride material, and the heat-conducting shaft maintains tangential fit with the corrugated fire tube and the chimney pipe respectively.

[0018] Furthermore, through grooves are evenly opened inside the filling base, and elastic support pads are fixedly connected to the inside of the through grooves. The elastic support pads are curved as a whole, and the crest positions of the elastic support pads are kept in contact with the outer wall of the chimney pipe, and the trough positions of the elastic support pads are kept in contact with the outer wall of the filling base.

[0019] Furthermore, a spherical protrusion is evenly and fixedly connected to the outer wall of the chimney pipe on the side away from the corrugated fire tube, and the spherical protrusion is entirely made of a high-temperature resistant alloy material.

[0020] Compared with the prior art, the beneficial effects of the present invention are as follows: (1) Based on the application of oil extraction and processing scenarios, the device introduces an airflow balancing component, so that the flame airflow output by the burner flows into the inside of the corrugated fire tube in a composite manner of external rotation and internal straightness, thereby realizing dual regulation of flame combustion. First, the inner layer of the direct current structure combs the flame into a stable columnar flow through the guide vane to avoid the flame divergence caused by turbulence; and the outer layer of the spiral flow gives the flame a rotating characteristic through the curved track and the swirl component, so that the fuel and air are mixed more fully. The combination of the two can not only ensure the stability of the core temperature of the flame, but also use the outer layer of the rotating airflow to enhance the combustion intensity of the edge area, thereby improving the overall combustion efficiency and reducing fuel waste. In the links that require stable heat supply, such as wellhead heating and oil pipeline insulation, the device can provide continuous and stable heat energy with less fuel consumption, reduce energy costs, and meet the requirements of energy conservation and emission reduction in the oil industry.

[0021] The "outer spiral and inner straight" composite flow pattern causes the flame to present a spirally wrapped straight flow when entering the corrugated fire tube, changing the single axial flow path of the traditional flame. The outer spiral flame diffuses toward the inner wall of the fire tube under the action of centrifugal force, forming a spiral heat transfer trajectory. Compared with traditional straight-line flow, this significantly increases the contact area between the flame and the inner wall of the fire tube. This method of increasing the contact area allows the flame heat to be more fully transferred to the fire tube. The stable and efficient heat generation capacity can ensure that the temperature of the wellhead and oil pipeline is maintained in the appropriate range, preventing the oil from solidifying due to excessively low temperature and ensuring production continuity.

[0022] During the flame airflow transmission process, the air film formed by the external spiral flow acts as a protective layer, which can resist external airflow disturbances, such as pressure fluctuations or lateral airflow impacts when the boiler is started and stopped; the internal direct current structure maintains the rigidity and stability of the flame core, ensuring that the flame propagation direction is fixed. The inner and outer layers cooperate with each other, the outer spiral flow buffers external interference, and the inner direct current flow provides a stable core, jointly ensuring that the flame maintains a stable shape when entering the corrugated fire tube, avoiding unstable phenomena such as flame deviation and flameout, and improving the reliability of boiler operation.

[0023] (2) In actual use, such as oil extraction in cold areas in winter, the funnel-shaped separation shell constructs a physical isolation barrier between the flame and the flue gas, separating the output high-temperature flame path from the subsequent low-temperature flue gas flow channel. In this way, the direct collision between the flame and the exhaust gas is effectively avoided, and the turbulence and eddy currents caused by the intersection of cold and hot air flows are prevented, and the flame shape distortion or flue gas backflow phenomenon is avoided. Compared with the traditional open structure, the separation shell ensures that the flame airflow maintains a stable outward-rotating and inward-straight flow pattern in the corrugated fire tube, while preventing the exhaust gas from interfering with the combustion process, thereby ensuring the continuous and stable operation of the boiler and providing reliable thermal energy support for oil extraction.

[0024] At the same time, the curved surface and gradually expanding structure of the separation shell form a natural diversion channel. On the one hand, when the flue gas turns on the curved surface, the flow velocity distribution is automatically uniformed due to centrifugal force and the widening of the channel, reducing local high-speed or low-speed areas; on the other hand, the design of the wide end close to the inner wall of the boiler tube automatically compensates for the air intake of the bottom chimney, balancing the flow difference caused by the rising hot air. This design can control the air intake deviation of each chimney to an extremely small range, avoiding the uneven smoke exhaust problem of "more on top and less on bottom" in the traditional layout. In the process of oil extraction and processing, improving heat utilization means being able to use energy more efficiently, reduce production costs, and reduce the environmental impact brought by energy consumption, which is in line with the concept of sustainable development of the oil industry.

[0025] (3) The boron nitride heat-conducting shaft can quickly capture the heat emitted by the corrugated fire tube and transfer it to the chimney pipe efficiently due to its excellent thermal conductivity. The semicircular filling base is designed to fit the tangent of the fire tube and the chimney, which maximizes the contact area, reduces the heat transfer resistance, and makes the heat transfer more sufficient. By preheating the chimney pipe in advance, the heat exchange temperature difference during the subsequent high-temperature flue gas flow is reduced, reducing heat loss and effectively utilizing the heat that might have been wasted.

[0026] The elastic pad fits against the outer wall of the chimney pipe. When the chimney pipe vibrates slightly due to the flow of smoke, the elastic pad will undergo elastic deformation. The small force generated by this deformation can effectively shake off dust, ash and other impurities attached to the inner wall of the chimney pipe. This avoids problems such as a reduction in the inner diameter of the chimney pipe and increased exhaust resistance caused by long-term accumulation of impurities. At oil extraction and processing sites, the environment is usually harsh, with a lot of dust and impurities. The self-cleaning function of this device can reduce the workload and cost of equipment maintenance, ensure that the smoke can be discharged smoothly, and improve the reliability and stability of the equipment.

[0027] Adding high-temperature resistant alloy spherical protrusions on the outer wall of the chimney pipe can enhance the heat exchange efficiency by increasing the heat exchange area with the cold water in the boiler tube, transfer more waste heat of the flue gas to the cold water, and improve the overall thermal utilization rate of the boiler; at the same time, the protrusion structure can disturb the water flow and destroy the boundary layer, making the cold water temperature distribution more uniform, reducing thermal stress concentration, and reducing the risk of chimney overheating. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the main three-dimensional structure of the present invention.

[0029] Figure 2 It is a schematic diagram of the internal three-dimensional structure of the boiler drum of the present invention.

[0030] Figure 3 This is a schematic diagram of the corresponding positional relationship between the outer spiral tube and the burner of the present invention.

[0031] Figure 4Schematic diagram of the flame airflow inside the corrugated fire tube of the present invention.

[0032] Figure 5 It is a schematic diagram of the internal three-dimensional structure of the outer spiral cylinder and the inner straight cylinder of the present invention.

[0033] Figure 6 It is a schematic top view of the outer spiral cylinder and other components of the present invention.

[0034] Figure 7 Schematic diagram of smoke flow inside the chimney pipe of the present invention.

[0035] Figure 8 This is a schematic diagram of the positional relationship between the flue gas duct and the corrugated fire tube of the present invention.

[0036] Figure 9 This is a schematic diagram of the three-dimensional structure of the filling base of the present invention.

[0037] Figure 10 This is a schematic diagram of the three-dimensional structure of the filling base and other components of the present invention from a plane side view.

[0038] The numbers in the figure are: 1. boiler cylinder; 11. burner; 12. corrugated fire tube; 13. chimney pipe; 14. flue pipe; 2. air flow balancing component; 21. outer spiral cylinder; 22. curved track; 23. swirl part; 24. inner straight cylinder; 25. guide vane; 26. assembly bracket; 27. separation shell; 28. isolation layer; 29. ​​filling base; 210. heat conduction shaft; 211. through groove; 212. elastic support pad; 213. spherical protrusion. DETAILED DESCRIPTION

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0040] It should be noted that the structures and working principles of the above-mentioned components such as the boiler tube 1, burner 11, corrugated fire tube 12, chimney pipe 13, flue pipe 14, etc. belong to the existing technology and will not be described in detail here.

[0041] Example 1: Please refer to Figures 1-10As shown, an integrated circulating hot water boiler includes a boiler tube 1, a burner 11 is installed on the side of the boiler tube 1, a corrugated fire tube 12 is installed inside the boiler tube 1, a chimney pipe 13 is evenly installed on the outside of the corrugated fire tube 12, a flue pipe 14 is installed on the upper side of the boiler tube 1, and an airflow balancing component 2 is arranged between the burner 11 and the corrugated fire tube 12. The airflow balancing component 2 includes an outer spiral tube 21 and an inner straight tube 24. The burner 11, the outer spiral tube 21, the inner straight tube 24 and the corrugated fire tube 12 are in the same horizontal plane, and the output end of the burner 11 is aligned with the axial center line of the outer spiral tube 21, the inner straight tube 24 and the corrugated fire tube 12. The inner straight tube 24 is located inside the outer spiral tube 21. After the flame airflow output from the output end of the burner 11 passes through the outer spiral tube 21 and the inner straight tube 24 and is output, it will flow in a composite manner of outward rotation and inner straightness, thereby ensuring the stability of the flame airflow output.

[0042] Please refer to Figures 1-10 As shown, the outer spiral tube 21 is sleeved on the outer wall of the output shaft end of the burner 11, and the inner wall of the outer spiral tube 21 is fixedly connected with a curved track 22. The curved track 22 is spiral in shape as a whole, and a swirl member 23 is installed inside the output end of the outer spiral tube 21. The swirl member 23 is composed of a plurality of inclined fan-shaped pieces and a connecting ring. The outer spiral tube 21 and the inner direct current tube 24 are movably connected through the swirl member 23. The inner direct current tube 24 is located at the internal axis position of the outer spiral tube 21. The inner side wall of the inner direct current tube 24 is evenly fixedly connected with guide vanes 25. The guide vanes 25 are all isosceles triangles, and the tips of the guide vanes 25 are close to each other.

[0043] Specifically, when the flame airflow output by the burner 11 enters the interior of the outer spiral tube 21, the spiral curved track 22 fixed on its inner wall will first guide the airflow. When the airflow moves along the spiral surface of the curved track 22, it is subject to the combined action of centrifugal force and the constraint of the wall of the outer spiral tube 21, and gradually obtains a tangential velocity component, forming a spiral flow trend. When the airflow reaches the output end of the outer spiral tube 21, the swirl element 23 installed inside further enhances the spiral effect through a number of inclined fan-shaped pieces. The inclination angle between each two adjacent fan-shaped pieces causes the airflow to generate a rotational torque, and finally forms a stable spiral flow pattern. At this time, the flame airflow in the outer spiral tube 21 diffuses to the periphery in a spiral manner.

[0044] At the same time, when the central airflow output by the burner 11 enters the inner straight-flow tube 24 again, the isosceles triangular guide vanes 25 evenly distributed on its inner wall play a key role. The tips of the guide vanes 25 are close together to form an axial channel, which combs the turbulent central airflow into laminar flow along the axial direction, and the smooth curved surface of the guide vanes 25 guides the airflow to maintain axial flow and avoid radial diffusion, thereby forming a stable straight-flow core in the central area of ​​the composite flow pattern.

[0045] The outer spiral tube 21 and the inner straight tube 24 are arranged coaxially, so that the outer spiral airflow and the inner straight core form a composite flow field of "outer layer wrapping inner layer" at the entrance of the corrugated fire tube 12: the outer spiral airflow pushes the flame to the inner wall of the corrugated fire tube 12 through centrifugal force, extending the heat exchange path; the inner straight core maintains the flame stiffness and avoids the divergence of the overall shape. The synergistic effect of the two enables the flame airflow to enter the corrugated fire tube 12 stably, reducing the turbulence caused by sudden change in flow velocity or expansion of space.

[0046] Based on Example 1, please refer to Figures 1-10 As shown, the airflow balancing component 2 also includes a separation shell 27. When the flame airflow output by the burner 11 contacts the side wall of the corrugated fire tube 12, it will bend back in a symmetrical form to form a return flame and gradually generate high-temperature flue gas. The high-temperature flue gas balances the flow difference caused by the rising characteristics of the hot gas under the guidance limit of the separation shell 27, thereby avoiding the distribution problem of more flue gas at the top and less at the bottom, until the flue gas flows into the inside of the chimney pipe 13 and is discharged from the flue pipe 14.

[0047] It should be noted that the outer wall of the outer spiral tube 21 is movably connected to the assembly bracket 26, and the end of the assembly bracket 26 away from the outer spiral tube 21 is fixedly connected to the separation shell 27, and the separation shell 27 is located in the interval area formed between the burner 11 and the corrugated fire tube 12 inside the boiler tube 1. The separation shell 27 is funnel-shaped as a whole, and the narrow end of the separation shell 27 is close to the corrugated fire tube 12, and the wide end is close to the burner 11. The outer wall of the separation shell 27 is evenly fixedly connected with an isolation layer 28, and the isolation layer 28 is located between every two adjacent chimney pipes 13. A filling base 29 is installed in the interval area between the corrugated fire tube 12 and the chimney pipe 13, and the filling base 29 is covered in a semicircular form on the chimney pipe 13 near the corrugated fire tube. On one side of the tube 12, the filling base 29 is internally slidably connected to a heat-conducting shaft 210, which is made of boron nitride material, and the heat-conducting shaft 210 is tangentially fitted with the corrugated fire tube 12 and the chimney pipe 13 respectively. A through groove 211 is evenly penetrated inside the filling base 29, and an elastic support pad 212 is fixedly connected to the inside of the through groove 211. The elastic support pad 212 is curved as a whole, and the crest position of the elastic support pad 212 is fitted with the outer wall of the chimney pipe 13, and the trough position of the elastic support pad 212 is fitted with the outer wall of the filling base 29. The outer wall of the chimney pipe 13 away from the corrugated fire tube 12 is evenly fixed with a spherical protrusion 213, which is made of a high-temperature resistant alloy material as a whole.

[0048] Specifically, the flame generated by the burner 11 forms a stable composite flow pattern through the outer spiral tube 21 and the inner straight tube 24, enters the corrugated fire tube 12, burns, and generates high-temperature flue gas. When the flue gas contacts the side wall of the corrugated fire tube 12 and returns, the funnel-shaped separation shell 27 begins to play a role: the wide end of the separation shell 27 is close to the burner 11 and has a large area, while the narrow end is close to the corrugated fire tube 12 and has a small area. When the flue gas flows in the gradually expanding channel, the flow rate is reduced, which promotes the flue gas to diffuse to the bottom chimney pipe 13, compensating for the insufficient air intake at the bottom caused by the rising hot gas. In addition, the separation shell 27 is located at the corrugated fire tube 12. The symmetrical structure of the center position between the spark tube 12 and the burner 11 ensures that the returned flue gas is evenly distributed to the chimney pipes 13 on both sides to avoid local flow concentration. In addition, the isolation layer 28 separates the entrances of each chimney pipe 13 to avoid uneven flow caused by the horizontal flow of flue gas between adjacent chimney pipes 13. In addition, the curved surface of the separation shell 27 guides the flue gas into the corresponding chimney pipe 13 along a preset path, forcing the balance of the air intake of each chimney pipe 13 to ensure that the flue gas flow deviation is within a controllable range.

[0049] Among them, the heat-conducting shaft 210 made of boron nitride is tangentially fitted with the corrugated fire tube 12 and the chimney pipe 13, quickly conducting the heat of the corrugated fire tube 12 to the chimney pipe 13. The semicircular filling base 29 wraps the chimney pipe 13, maximizing the contact area, reducing thermal resistance, and preheating the chimney pipe 13 in advance. In addition, the curved structure of the elastic support pad 212 is fitted with the outer wall of the chimney pipe 13. When the flow of flue gas causes the chimney pipe 13 to vibrate slightly, the elastic support pad 212 is deformed accordingly, generating high-frequency micro-vibration, which shakes off the dust and condensate attached to the inner wall of the chimney pipe 13, preventing dust accumulation, blockage and corrosion, and keeping the chimney unobstructed.

[0050] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. An integrated circulating hot water boiler, comprising a boiler barrel (1), a burner (11) mounted on the side of the boiler barrel (1), a corrugated fire tube (12) mounted inside the boiler barrel (1), a chimney pipe (13) mounted evenly outside the corrugated fire tube (12), and a flue pipe (14) mounted on the upper side of the boiler barrel (1), characterized in that: An airflow balancing component (2) is provided between the burner (11) and the corrugated fire tube (12), and the airflow balancing component (2) includes an outer spiral tube (21) and an inner straight tube (24). The burner (11), the outer spiral tube (21), the inner straight tube (24) and the corrugated fire tube (12) are in the same horizontal plane, and the output end of the burner (11) is aligned with the axis of the outer spiral tube (21), the inner straight tube (24) and the corrugated fire tube (12). The inner straight tube (24) is located inside the outer spiral tube (21). The flame airflow output from the output end of the burner (11) passes through the outer spiral tube (21). After being output from the outer spiral cylinder (21) and the inner straight cylinder (24), it will flow in a composite manner of outer rotation and inner straightness; the airflow balancing component (2) also includes a separation shell (27). When the flame airflow output by the burner (11) contacts the side wall of the corrugated fire tube (12), it will be symmetrically turned back to form a return flame and gradually generate high-temperature flue gas. The high-temperature flue gas balances the flow difference caused by the rising characteristics of the hot gas under the guide limit of the separation shell (27), thereby avoiding the distribution problem of more flue gas at the top and less at the bottom, until the flue gas flows into the inside of the chimney pipe (13) and is discharged from the flue pipe (14).

2. The integrated circulating hot water boiler according to claim 1, characterized in that: The outer spiral barrel (21) is sleeved on the outer wall of the output shaft end of the burner (11), and the inner wall of the outer spiral barrel (21) is fixedly connected with a curved track (22), the curved track (22) is spiral in shape as a whole, and a swirl member (23) is installed inside the output end of the outer spiral barrel (21).

3. The integrated circulating hot water boiler according to claim 2, characterized in that: The swirl member (23) is composed of a plurality of inclined sector-shaped pieces and a connecting ring. The outer spiral cylinder (21) and the inner straight-flow cylinder (24) are movably connected via the swirl member (23).

4. The integrated circulating hot water boiler according to claim 1, characterized in that: The inner direct current cylinder (24) is located at the inner axis position of the outer spiral cylinder (21), and the inner side wall of the inner direct current cylinder (24) is evenly fixedly connected with guide vanes (25), and the guide vanes (25) are all isosceles triangles, and the tips of the guide vanes (25) are close to each other.

5. The integrated circulating hot water boiler according to claim 1, characterized in that: The outer wall of the outer spiral cylinder (21) is movably connected to an assembly bracket (26), and one end of the assembly bracket (26) away from the outer spiral cylinder (21) is fixedly connected to a separation shell (27). The separation shell (27) is located in a spacing area formed between the burner (11) and the corrugated fire tube (12) inside the boiler cylinder (1).

6. The integrated circulating hot water boiler according to claim 1, characterized in that: The separation shell (27) is funnel-shaped as a whole, with a narrow end of the separation shell (27) close to the corrugated fire tube (12) and a wide end close to the burner (11). An isolation layer (28) is evenly and fixedly connected to the outer wall of the separation shell (27), and the isolation layer (28) is located between every two adjacent chimney pipes (13).

7. The integrated circulating hot water boiler according to claim 1, characterized in that: A filling base (29) is installed in the interval area between the corrugated fire tube (12) and the chimney pipe (13), and the filling base (29) is semicircularly wrapped around the side of the chimney pipe (13) close to the corrugated fire tube (12).

8. The integrated circulating hot water boiler according to claim 7, characterized in that: A heat-conducting shaft (210) is slidably connected to the interior of the filling base (29), the heat-conducting shaft (210) being made of a boron nitride material, and the heat-conducting shaft (210) is tangentially fitted to the corrugated fire tube (12) and the chimney pipe (13), respectively.

9. The integrated circulating hot water boiler according to claim 7, characterized in that: The filling base (29) is evenly provided with through grooves (211), and the through grooves (211) are fixedly connected to elastic pads (212). The elastic pads (212) are generally curved, and the crests of the elastic pads (212) are kept in contact with the outer wall of the chimney pipe (13), and the troughs of the elastic pads (212) are kept in contact with the outer wall of the filling base (29).

10. The integrated circulating hot water boiler according to claim 1, characterized in that: A spherical protrusion (213) is evenly and fixedly connected to the outer wall of the chimney pipe (13) on a side away from the corrugated fire tube (12), and the spherical protrusion (213) is entirely made of a high-temperature resistant alloy material.

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