Gas steam generator

Abstract

The present invention relates to a gas steam generator, comprising a shell, a heat exchange cavity and a combustion chamber in the shell, a burner assembly installed at the top of the combustion chamber, a water inlet at the lower end of the shell and a steam outlet at the upper end, the water inlet and the steam outlet are connected to the heat exchange cavity, a heat exchange tube group is installed in the heat exchange cavity, the heat exchange tube group is composed of one or more finned heat exchange tubes, the finned heat exchange tubes are connected to the combustion chamber, the heat exchange cavity extends toward the combustion chamber and surrounds at least part of the outside of the combustion chamber, and an annular steam cavity is formed between the outer wall of the combustion chamber and the inner wall of the shell. The present invention can greatly increase the heat exchange intensity, heat up quickly, and have high heat exchange efficiency.

Description

Technical Field

[0001] The invention belongs to the technical field of heating equipment, and in particular relates to a gas steam generator. Background Art

[0002] Gas steam generator is a mechanical device that uses the heat energy generated by gas combustion to heat water into hot water or steam. It mainly includes vertical and horizontal types, and is divided into condensing type and non-condensing type, as well as inertial flow type. In the current existing technology, the steam generator is mainly composed of heat exchanger, burner, fan, solenoid valve, venturi, water level limiting device and exhaust pipe and other components. Water and high-temperature flue gas generated by combustion exchange heat in the heat exchanger. After the water is heated, steam is generated and discharged from the steam outlet. The high-temperature flue gas is discharged from the exhaust pipe after cooling.

[0003] However, the current steam generators generally use the traditional non-condensing heat exchange method, which is inefficient. There are also exhaust gas plate heat recovery devices added to the flue, but the heat conversion efficiency is also not ideal.

[0004] In addition, in the perfusion type, the water content of steam is too high in actual use, so a steam-water separator must be added at the steam outlet. The separated water then flows back to the heat exchange evaporator and is heated and boiled again. Its efficiency does not exceed 93%. It not only wastes energy, but also increases production costs.

[0005] In addition, many current gas steam generators use closed combustion, but the combustion chamber (combustion chamber) is not equipped with explosion relief pipes. Once the control system fails to ignite, if the front and back cleaning is not thorough, it is very easy to ignite and deflagrate again, causing equipment damage or serious accidents such as gas leakage and explosion. Summary of the invention

[0006] The main technical problem solved by the present invention is to provide a gas steam generator which can greatly increase the heat exchange intensity, has fast temperature rise and high heat exchange efficiency.

[0007] To achieve the above object, the first technical solution of the present invention is:

[0008] A gas steam generator comprises a shell, wherein a heat exchange cavity and a combustion chamber are provided in the shell, a burner assembly is installed at the top of the combustion chamber, a water inlet is provided at the lower end of the shell and a steam outlet is provided at the upper end, the water inlet and the steam outlet are connected with the heat exchange cavity, a heat exchange tube group is installed in the heat exchange cavity, the heat exchange tube group is composed of one or more finned heat exchange tubes, the finned heat exchange tubes are connected with the combustion chamber, the heat exchange cavity extends toward the combustion chamber and surrounds at least part of the outside of the combustion chamber, and an annular steam cavity is formed between the outer wall of the combustion chamber and the inner wall of the shell.

[0009] Furthermore, the shell on the top of the heat exchange cavity extends outward to surround the outside of the combustion chamber, and the shell as a whole presents a water tower-like structure that is thick at the top and thin at the bottom.

[0010] Furthermore, the burner assembly includes a burner, a fan and an upper cover, wherein the fan is mounted on the upper cover, and the upper cover is detachably mounted on the top of the shell, wherein the upper cover has an upwardly protruding portion, wherein a gas mixing and pressure stabilizing chamber is formed in the upper cover, and a porous distribution plate is arranged between the gas mixing and pressure stabilizing chamber and the burner.

[0011] Furthermore, the outer edge of the upper cover has a circular downwardly turned edge, and the upper cover is buckled and fixed on the top end of the shell.

[0012] Furthermore, a spoiler is installed in the fin heat exchange tube.

[0013] Furthermore, the spoiler includes a spoiler rod and a spiral spoiler sheet wound around the spoiler rod, and the spoiler extends along the axial direction of the fin heat exchange tube.

[0014] Furthermore, the edge of the spoiler abuts against the inner wall of the fin heat exchange tube.

[0015] Furthermore, a base is provided below the shell, a condensate separation chamber is formed in the base, the other end of the fin heat exchange tube is connected to the condensate separation chamber, and one end of the spoiler rod extends outward into the condensate separation chamber.

[0016] Furthermore, one or more explosion-proof pipes for connecting the combustion chamber with the outside are arranged on the shell of the annular steam chamber, one end of the explosion-proof pipe body is fixedly connected to the outer wall of the combustion chamber, and the other end of the explosion-proof pipe body is connected to the outside.

[0017] Furthermore, the outer end surface of the explosion relief pipe is an upwardly open inclined hole, and a cover plate which can be opened and closed automatically is sealed and installed on the outer end surface of the explosion relief pipe.

[0018] Furthermore, the cover plate is a hollow structure, and is filled with heat insulating material in the middle.

[0019] Furthermore, the top of the cover plate is connected to the shell body in a rotatable manner through a hinge structure, and the cover plate is sealed on the outer end surface of the explosion relief pipe by gravity;

[0020] Alternatively, the top of the cover plate is rotatably connected to the housing via a rotating shaft, a torsion spring is installed at the rotating shaft, and the cover plate is pressed against the outer end surface of the explosion-proof tube by the elastic force of the torsion spring.

[0021] In summary, the gas steam generator provided by the present invention has the following advantages compared with the prior art:

[0022] (1) The present invention extends the heat exchange chamber toward the combustion chamber and surrounds the outside of the combustion chamber, forming an annular steam chamber on the periphery of the combustion chamber, so that the steam entering the annular steam chamber is reheated and vaporized, which is beneficial to greatly increase the heat exchange intensity, quickly heat up, and have high heat exchange efficiency, which is beneficial to achieve complete vaporization of water when discharged from the steam outlet, further increasing the amount of steam generated and the steam temperature.

[0023] (2) The present invention provides a spoiler rod and a spiral spoiler sheet, which can be burned red when the burner is burning to generate a large amount of far-infrared radiation energy. At the same time, the spiral spoiler sheet plays a role in blocking the high-temperature flue gas flowing along the fin heat exchange tube, which is beneficial to extend the length of the burned red part. It is not only beneficial to greatly increase the heat exchange intensity and improve the heat exchange efficiency, but also beneficial to increase the heat exchange process between water and high-temperature flue gas, so that the water in the water cavity can fully exchange heat with the high-temperature flue gas, thereby increasing the amount of steam generated and the steam temperature.

[0024] (3) The present invention, through the provision of the spoiler rod and the spiral spoiler, is also helpful in reducing the amount of condensed water generated by the high-temperature flue gas during the heat exchange process, thereby helping to increase the service life of the heat exchanger.

[0025] (4) The present invention extends the spoiler rod downward from the fin heat exchange tube and extends it all the way to the condensate separation chamber below. It not only guides the condensate generated by the high-temperature flue gas during the heat exchange process, but also helps to further improve the degree of flue gas-water separation and increase the service life of the steam generator. At the same time, the spoiler rod can also be used to support the spoiler, so that the spoiler can be installed separately in the fin heat exchange tube, which is convenient for daily maintenance of the spoiler.

[0026] (5) The present invention also provides a plurality of explosion relief pipes at the combustion chamber. When an explosion occurs, the explosion relief pipes can be automatically opened to connect the combustion chamber with the outside atmosphere, thereby protecting the burner and ensuring the safety of the steam generator. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings are part of the present invention and are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention, but do not constitute an improper limitation of the present invention. Obviously, the accompanying drawings described below are only some embodiments. For ordinary technicians in this field, other accompanying drawings can be obtained based on these accompanying drawings without creative work.

[0028] Figure 1 It is a schematic diagram of the structure of the gas steam generator of the present invention;

[0029] Figure 2 It is a cross-sectional view of the structure of the gas steam generator of the present invention;

[0030] Figure 3Schematic diagram of the structure of the spoiler of the present invention;

[0031] Figure 4 It is a cross-sectional view of the steam chamber structure of the present invention (the explosion relief pipe is opened);

[0032] Figure 5 It is a cross-sectional view of the steam chamber structure of the present invention (the explosion relief pipe is closed).

[0033] like Figures 1 to 5 As shown, the shell 1, the heat exchange chamber 2, the combustion chamber 3, the burner 4, the water inlet 5, the steam outlet 6, the finned heat exchange tube 7, the base 8, the extension 8a, the condensate separation chamber 9, the smoke exhaust pipe 10, the drain port 11, the annular steam chamber 12, the first partition 13, the second partition 14, the probe 15, the spoiler 16, the spoiler rod 161, the spoiler 162, the explosion venting pipe 17, the cover plate 18, the heat insulation material 18a, the folding Structure 19, upper cover 20, flange 20a, slot 20b, gas mixing and pressure stabilizing chamber 21, distribution plate 22, fan 23, venturi tube 24, air filter 25, proportional solenoid valve 26, locking buckle 27, spring buckle 27a, rotating shaft 27b, spoiler column 28, burner mounting frame 29, outer horizontal edge 29a, inner horizontal edge 29b, ignition needle 30, fire viewing hole 31, water level controller 32.

[0034] It should be noted that these drawings and textual descriptions are not intended to limit the conceptual scope of the present invention in any way, but are intended to illustrate the concept of the present invention for those skilled in the art by referring to specific embodiments. DETAILED DESCRIPTION

[0035] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. The following embodiments are used to illustrate the present invention but are not used to limit the scope of the present invention.

[0036] like Figure 1 and Figure 2 As shown, a gas steam generator provided by the present invention includes a shell 1, a heat exchange chamber 2 and a combustion chamber 3 are provided in the shell 1, and a burner assembly (not shown in the figure) is installed on the top of the combustion chamber 3. In this embodiment, preferably, the combustion chamber 3 is arranged above the heat exchange chamber 2, and the burner assembly includes a burner 4. The burner 4 is installed above the heat exchange chamber 2, and the burner 4 is preferably a ceramic plate infrared combustion plate.

[0037] A water inlet 5 is provided at the lower end of the shell 1, and a steam outlet 6 is provided at the upper end of the shell 1. The water inlet 5 and the steam outlet 6 are connected to the heat exchange chamber 2. The heat exchange chamber 2 is filled with water, and a heat exchange tube group is installed in the heat exchange chamber 2. The heat exchange tube group consists of one or more fin heat exchange tubes 7. The fin heat exchange tubes 7 extend along the axial direction of the heat exchange chamber 2. Multiple fin heat exchange tubes 7 are arranged in parallel in the heat exchange chamber 2. One end of the fin heat exchange tube 7 is connected to the combustion chamber 3, and the high-temperature flue gas generated by combustion circulates in the fin heat exchange tube 7. The use of the fin heat exchange tube 7 is conducive to increasing the heat exchange area between water and the high-temperature flue gas in the fin heat exchange tube 7, thereby improving the heat exchange efficiency.

[0038] A base 8 is installed below the shell 1, and the base 8 is connected to the shell 1 by screws. A condensate separation chamber 9 is formed in the base 8, and the other end of the fin heat exchange tube 7 is connected to the condensate separation chamber 9. A smoke exhaust pipe 10 is installed on one side of the base 8, and the smoke exhaust pipe 10 is connected to the condensate separation chamber 9. The smoke exhaust pipe 10 is extended upward, and one side of the base 8 has an extension 8a extending outward to the outside of the shell 1. The extension 8a is triangular as a whole to save space. A smoke exhaust port (not shown in the figure) is provided on the extension 8a, and the smoke exhaust port is fixedly connected to the smoke exhaust pipe 10. A drain port 11 is provided at the bottom of the condensate separation chamber 9, and the condensate is discharged from the drain port 11. In order to facilitate drainage, the bottom surface of the base 8 is an inclined surface inclined toward the drain port 11.

[0039] The high-temperature flue gas generated by the combustion of the burner 4 enters the finned heat exchange tube 7, and performs heat exchange with the water in the shell 1 in the finned heat exchange tube 7. The water is heated and heated to generate steam, and the steam is discharged from the steam outlet 6 at the top. The high-temperature flue gas is cooled in the process of descent, and the cooled low-temperature flue gas is discharged to the atmosphere from the exhaust pipe 10 on one side. At the same time, the condensed water generated in the process of cooling the flue gas enters the condensed water separation chamber 9 at the bottom and is discharged through the drain port 11.

[0040] In this embodiment, preferably, the top of the heat exchange chamber 2 extends toward the direction of the combustion chamber 3 and surrounds at least part of the outside of the combustion chamber 3, forming an annular steam chamber 12 on the outside of the combustion chamber 3, and the steam outlet 6 is connected to the annular steam chamber 12. The setting of the annular steam chamber 12 allows the water or steam after heat exchange with the high-temperature flue gas in the finned heat exchange tube 7 to further exchange heat with the high-temperature flue gas in the combustion chamber 3 again, so as to further improve the heat exchange intensity, completely evaporate the unevaporated water and increase the evaporation temperature. It is further preferred that the heat exchange chamber 2 surrounds the entire combustion chamber 3 therein, so that the water or steam can fully exchange heat with the high-temperature flue gas in the combustion chamber 3.

[0041] In this embodiment, the annular steam chamber 12 is surrounded by the outside of the combustion chamber 3 in an annular shape. Preferably, the shell 1 on the top of the heat exchange chamber 2 is expanded outward to surround the outside of the combustion chamber 3. The shell 1 as a whole is a water tower-like structure with a thick top and a thin bottom. In this way, the volume of the annular steam chamber 12 can be guaranteed while the volume of the combustion chamber 3 can be guaranteed. The number of fin heat exchange tubes 7 connected to the combustion chamber 3 is guaranteed as much as possible, thereby ensuring the heat exchange efficiency between water and high-temperature flue gas.

[0042] The water entering the heat exchange chamber 2 from the water inlet 5 flows from bottom to top under the action of the water inlet pressure. At the same time, the high-temperature flue gas generated by the combustion of the burner 4 enters all the finned heat exchange tubes 7 from the top and flows downward along the finned heat exchange tubes 7. During the flow, it exchanges heat with the water in the heat exchange chamber 2, and the water is heated to generate steam. The steam goes up to the annular steam chamber 12 at the top. Since the annular steam chamber 12 is arranged in an annular shape around the combustion chamber 3, the steam entering the annular steam chamber 12 can be heated and vaporized by the high-temperature flue gas generated by the burner 4, which is conducive to achieving the complete vaporization of the water when it is discharged from the steam outlet 6, further increasing the steam generation amount and steam temperature. Similarly, due to the setting of the annular steam chamber 12, the highest water filling level in the heat exchange chamber 2 can be raised to a position equal to or higher than the top of the finned heat exchange tube 7, thereby increasing the water filling amount of the steam generator.

[0043] like Figure 2 As shown, in this embodiment, the upper combustion chamber 3 is separated from the heat exchange chamber 2 by a first partition 13, and the first partition 13 is a cylindrical structure with an open top and a sealed bottom, and the first partition 13 surrounds the cylindrical combustion chamber 3. The condensate separation chamber 9 at the bottom is separated from the heat exchange chamber 2 by a second partition 14, and the upper and lower ends of the finned heat exchange tube 7 are opened on the first partition 13 and the second partition 14 and are connected to the combustion chamber 3 and the condensate separation chamber 9 respectively. More preferably, in order to simplify the structure, the first partition 13, the second partition 14 and the shell 1 can be cast as one piece.

[0044] In this embodiment, it is further preferred that a spoiler 16 is installed in each fin heat exchange tube 7. The spoiler 16 is conducive to reducing the speed of high-temperature flue gas flowing in the fin heat exchange tube 7 and increasing the time for high-temperature flue gas to flow in the fin heat exchange tube 7, thereby facilitating extending the length of the red-burned part of the spoiler 16, increasing the far-infrared radiation energy, and further increasing the heat exchange intensity.

[0045] In this embodiment, preferably, the spoiler 16 includes a spoiler rod 161 , which is inserted into the fin heat exchange tube 7 and extends along the axial direction of the fin heat exchange tube 7 , and a spiral spoiler sheet 162 wound around the spoiler rod 161 is provided on the spoiler rod 161 .

[0046] In this embodiment, the spoiler rod 161 is preferably a cylindrical rod, more preferably a solid cylindrical metal rod, and the spoiler 162 is also preferably a solid metal sheet. The material of the spoiler rod 161 and the spoiler 162 is the same as that of the fin heat exchange tube 7, preferably stainless steel material and silicon carbide tube, and the spoiler rod 161 and the spoiler 162 are welded together. The spoiler 16 is installed in the fin heat exchange tube 7, and the spoiler rod 161 and the spoiler 162 are both solid structures. The purpose is to use the spoiler 16 to absorb more heat generated by the burner 4, so that the spoiler 16 can be burned red to generate a large amount of far-infrared radiation energy, which is used to greatly increase the heat exchange intensity of the heat exchanger and improve the heat exchange efficiency.

[0047] The edge of the spoiler 162 abuts against the inner wall of the fin heat exchange tube 7, and there is no gap between the edge of the spoiler 162 and the inner wall of the fin heat exchange tube 7. The spoiler 162 plays a role of blocking the high-temperature flue gas flowing downward along the fin heat exchange tube 7. The high-temperature flue gas can only flow from top to bottom along the path defined by the spiral spoiler 162, which reduces the speed of the high-temperature flue gas flowing in the fin heat exchange tube 7 and increases the time for the high-temperature flue gas to flow in the fin heat exchange tube 7, thereby helping to extend the length of the red-burned part of the spoiler 16 under high-temperature conditions, increase the far-infrared radiation energy, and further increase the heat exchange intensity, so that the water in the heat exchange cavity 2 outside the fin heat exchange tube 7 can fully exchange heat with the high-temperature flue gas in the fin heat exchange tube 7, which is beneficial to increase the steam generation and steam temperature.

[0048] After a large number of experimental verifications, while ensuring the absorption of heat energy and sufficient heat exchange, it is also ensured that the high-temperature flue gas can flow smoothly in the fin heat exchange tube 7 without generating high pressure in the fin heat exchange tube 7. In this embodiment, preferably, the diameter of the spoiler rod 161 is less than or equal to 1 / 2 of the inner diameter of the fin heat exchange tube 7. More preferably, the diameter of the spoiler rod 161 is 2-20mm, more preferably 3-10mm, and more preferably 4-8mm. The thickness of the spoiler 162 is preferably 2-8mm, more preferably 2-5mm, and more preferably 3-4mm. The pitch of the spoiler 162 is preferably 10-40mm, and more preferably 15-35mm.

[0049] In the process of heat exchange between high-temperature flue gas and water, condensed water will be generated due to the cooling of the high-temperature flue gas. In this embodiment, preferably, the distance between the starting end and the end end of the spoiler 162 is equal to the length of the fin heat exchange tube 7, and the length of the spoiler rod 161 is extended so that the length of the spoiler rod 161 is greater than the axial length of the fin heat exchange tube 7. The bottom of the spoiler rod 161 extends downward from the fin heat exchange tube 7 to the condensed water separation chamber 9 below. In this way, not only can the extended spoiler rod 161 be used to guide the condensed water generated by the high-temperature flue gas in the heat exchange process, but it is also beneficial to further improve the degree of smoke-water separation and to increase the service life of the heat exchanger.

[0050] In this embodiment, the spoiler rod 161 is extended downward into the condensate separation chamber 11, and the bottom of the spoiler rod 161 is directly against the bottom wall of the condensate separation chamber 9. The bottom wall of the condensate separation chamber 9 is used to support the spoiler 16 above. The extended spoiler rod 161 plays a better guiding role in the condensate generated by the high-temperature flue gas during the heat exchange process. At the same time, the spoiler rod 161 can be used to support the spoiler, so that the spoiler 16 can be installed separately in the fin heat exchange tube 7. The spoiler 16 can be smoothly pulled out or put into the fin heat exchange tube 7, which is convenient for daily maintenance of the spoiler 16.

[0051] like Figure 4 and Figure 5 As shown, in this embodiment, one or more explosion venting pipes 17 for connecting the combustion chamber 3 with the outside are arranged on the shell 1 connected to the annular steam chamber 12, and more preferably, 3-6 explosion venting pipes 17 are arranged along the circumference of the combustion chamber 3. If the top shell 1 of the heat exchange chamber 2 does not completely surround the combustion chamber 3, the explosion venting pipe 17 can also be directly arranged on the shell of the combustion chamber 3. One end of the main body of the explosion venting pipe 17 is welded to the outer wall of the combustion chamber 3, and the other end of the main body of the explosion venting pipe 17 passes through the shell 1 to communicate with the outside, and the main body of the explosion venting pipe 17 and the shell 1 are also welded together.

[0052] In this embodiment, the outer end surface of the explosion relief pipe 17 is an upwardly opening inclined hole, and an automatically opened and closed cover plate 18 is sealed and installed at the outer end surface of the explosion relief pipe 17. In order to ensure the sealing between the cover plate 18 and the explosion relief pipe 17 in the closed state, and also to simplify the structure, it is preferred that the outer end surface of the explosion relief pipe 17 has a certain slope relative to the outer wall of the housing 1, and the explosion relief pipe 7 is inclined upwardly opening.

[0053] The top of the cover plate 18 is connected to the housing 1 by a hinge structure 19 so that it can be lifted and rotated. The cover plate 18 can be sealed at the outer end surface of the explosion relief pipe 17 by gravity. A sealing ring is arranged between the cover plate 18 and the outer end surface of the explosion relief pipe 17 to achieve the sealing of the explosion relief pipe 17 under normal working conditions. When a deflagration occurs, the cover plate 18 can be automatically opened to connect the combustion chamber 3 with the outside atmosphere, and the pressure is released from the explosion relief pipe 17, thereby ensuring the safety of the steam generator.

[0054] More preferably, in this embodiment, the cover plate 18 adopts a sandwich structure, and is filled with a heat insulating material 18a in the middle, so as to ensure that when the burner 4 is burning, the cover plate 18 will not burn the operator due to excessive temperature.

[0055] In order to further ensure that the cover 18 is always in a sealed state during operation, it is more preferred that the top of the cover 18 is connected to the shell 1 through a rotating shaft (not shown in the figure) equipped with a torsion spring, and the cover 18 is pressed against the outer end face of the explosion-proof tube 17 by the elastic force of the torsion spring, and the elastic force of the torsion spring is used to provide pressure for the cover 18 to achieve a sealing effect.

[0056] When deflagration occurs, the cover 18 is popped open to release pressure, thereby protecting the burner 4. After deflagration is completed, the cover 18 falls back to the state of sealing the explosion relief tube 17 by gravity or the elastic force of the torsion spring.

[0057] like Figure 2 , Figure 4 and Figure 5 As shown, in this embodiment, the burner assembly is installed on the top of the combustion chamber 3, and the burner assembly includes a burner 4, a fan 23 and an upper cover 20. A venturi tube 24 is installed on the air inlet side of the fan 23, an air filter 25 is installed at the inlet end of the venturi tube 24, and a proportional solenoid valve 26 is also installed at the inlet end of the venturi tube 24. The upper cover 20 is detachably installed on the top of the housing 1, and the fan 23 is installed on the upper cover 20. The burner 4 is installed in the combustion chamber 3 in an inverted state.

[0058] In this embodiment, the upper cover 20 has an upwardly protruding portion, and a gas mixing and stabilizing pressure chamber 21 is formed in the upper cover 20. A porous distribution plate 22 is provided between the gas mixing and stabilizing pressure chamber 21 and the burner 4. The distribution plate 22 is a metal distribution plate, and the distribution plate 22 is used to evenly distribute the gas, so that the combustion is more complete and the flame is more uniform. An air inlet (not shown in the figure) is provided on the upper cover 20, and the air inlet is connected to the gas mixing and stabilizing pressure chamber 21, and a fan 23 is installed at the air inlet.

[0059] The outer edges of the upper cover 20 are provided with an annular downward flange 20a. The upper cover 20 is buckled and fixed on the top of the housing 1. The flange 20a is sealed and clamped on the outer side of the top edge of the housing 1. The height of the flange 20a is about 10mm to 30mm. The upper cover 20 is fixedly connected to the housing 1 through a plurality of locking buckles 27. The locking buckle 27 includes a spring buckle 27a. The bottom of the spring buckle 27a is hinged on the housing 1 through a rotating shaft 27b. A slot 20b is provided on the upper cover 20 at a position corresponding to the locking buckle 27. When the upper cover 20 is buckled on the housing 1, the spring buckle 27a is turned upward and clamped in the corresponding slot 20b on the upper cover 20 to achieve locking and fixing. The operation is simple and convenient, and the fixing is more firm and reliable. Of course, the slot 20b can be provided corresponding to the locking buckle 27, or it can be provided in a ring-shaped continuous manner on the upper cover 20.

[0060] In order to make the gas and air mix more fully in the gas mixing and pressure stabilizing chamber 21 to improve the combustion efficiency, it is preferred in the present embodiment that a plurality of spoiler columns 28 are also provided in the gas mixing and pressure stabilizing chamber 21. The spoiler columns 28 are fixed on the inner surface of the upper cover 20. The spoiler columns 28 extend into the gas mixing and pressure stabilizing chamber 21. The spoiler columns 28 are integrally formed with the upper cover 20.

[0061] The burner 4 is fixedly mounted on the housing 1 through the burner mounting frame 29. The burner mounting frame 29 is annular, and the longitudinal section of the burner mounting frame 29 is an inverted T-shaped. The upper cover 20 has a step-shaped structure that matches the burner mounting frame 29. The outer horizontal edge 29a of the burner mounting frame 29 is also pressed and fixed by the upper cover 20, and the inner horizontal edge 29b serves as the mounting support edge of the burner 4. The burner 4 is placed on the inner horizontal edge 29b. This mounting structure is easy to disassemble and assemble the burner 4 and is convenient for daily maintenance. The distribution plate 22 is also fixed on the burner mounting frame 29 through a clamping structure, and the burner 4 is clamped on the inner horizontal edge 29b by the distribution plate 22.

[0062] An ignition needle 30 and a flame observation hole 31 are also provided on the housing 1 at one side of the combustion chamber 3. The flame observation hole 31 is used for the user to observe the flame combustion condition.

[0063] A water level controller 32 is also installed on one side of the housing 1, and the water level of the heat exchange chamber 2 is defined by the water level controller 32. The interface of the water level controller 32 is connected to the heat exchange chamber 2, the pipe body of the water level controller 32 extends vertically upward, and a water level controller probe 15 is installed on the top of the water level controller 32.

[0064] The process of the gas steam generator is as follows:

[0065] The air is sucked into the venturi tube 24 by the fan 23 through the air filter 25, and after being premixed with the gas from the proportional solenoid valve 26, it enters the burner 4 through the outlet of the fan 23, and then passes through the spoiler column 28 and the distribution plate 22 to be sprayed and burned on the surface of the burner 4, so that the temperature of the combustion chamber 3 rises rapidly. The high-temperature flue gas generated after the combustion of the burner 4 quickly enters all the finned heat exchange tubes 7 equipped with spoilers 16 at the bottom of the combustion chamber 3, and the low-temperature water enters the heat exchange chamber 2 from the water inlet 5 at the bottom and flows upward along the heat exchange chamber 2 under the action of water pressure. The high-temperature flue gas generated by the combustion of the burner 4 enters the finned heat exchange tube 7 and flows downward along the finned heat exchange tube 7. The water is gradually heated and evaporated in the process of flowing upward, and is heated and evaporated after entering the annular steam chamber 12 at the top. At the same time, the cooling flue gas descends and enters the condensed water separation chamber 9 at the bottom. The low-temperature flue gas after heat exchange is discharged from the exhaust pipe 10, the condensed water in the flue gas after heat exchange is discharged from the drain port 11 on the base 8, and the high-temperature steam after heat exchange is discharged from the steam outlet 6 at the top.

[0066] The present invention has the following advantages:

[0067] (1) The present invention extends the heat exchange chamber 2 toward the combustion chamber 3 and surrounds the outside of the combustion chamber 3, forming an annular steam chamber 12 on the periphery of the combustion chamber 3, so that the steam entering the annular steam chamber 12 is reheated and vaporized, which is beneficial to greatly increase the heat exchange intensity, quickly heat up, and have high heat exchange efficiency, which is beneficial to achieve complete vaporization of water when it is discharged from the steam outlet 6, further increasing the amount of steam generated and the steam temperature.

[0068] (2) The present invention provides a spoiler rod 161 and a spiral spoiler sheet 162, which can be burned red when the burner is burning to generate a large amount of far-infrared radiation energy. At the same time, the spiral spoiler sheet 162 has a blocking effect on the high-temperature flue gas flowing along the fin heat exchange tube 7, which is beneficial to extend the length of the burned red part, which is not only beneficial to greatly increase the heat exchange intensity and improve the heat exchange efficiency, but also beneficial to increase the heat exchange process between water and high-temperature flue gas, so that the water in the water cavity and the high-temperature flue gas can fully exchange heat, thereby increasing the amount of steam generated and the steam temperature.

[0069] (3) The present invention, through the provision of the spoiler rod 161 and the spiral spoiler sheet 162, is also helpful in reducing the amount of condensed water generated by the high-temperature flue gas during the heat exchange process, thereby helping to increase the service life of the heat exchanger.

[0070] (4) In the present invention, the spoiler rod 161 extends downward from the fin heat exchange tube 7 and extends all the way to the condensate separation chamber 9 below, which not only guides the condensate generated by the high-temperature flue gas during the heat exchange process, but also helps to further improve the degree of flue gas-water separation and increase the service life of the steam generator. At the same time, the spoiler rod 161 can also be used to support the spoiler 16, so that the spoiler 16 can be installed separately in the fin heat exchange tube 7, which is convenient for daily maintenance of the spoiler 16.

[0071] (5) The present invention also provides a plurality of explosion relief pipes 17 at the combustion chamber. When an explosion occurs, the explosion relief pipes can be automatically opened to connect the combustion chamber with the outside atmosphere, thereby protecting the burner and ensuring the safety of the steam generator.

[0072] The above is only a preferred embodiment of the present invention, and does not limit the present invention in any form. Although the present invention has been disclosed as a preferred embodiment, it is not used to limit the present invention. Any technician familiar with this patent can make some changes or modify the technical contents suggested above into equivalent embodiments without departing from the scope of the technical solution of the present invention. However, any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present invention without departing from the content of the technical solution of the present invention still fall within the scope of the solution of the present invention.

Claims

1. A gas steam generator, comprising a shell, a heat exchange cavity and a combustion chamber in the shell, a burner assembly installed at the top of the combustion chamber, a water inlet at the lower end of the shell and a steam outlet at the upper end, the water inlet and the steam outlet are connected to the heat exchange cavity, characterized in that: The combustion chamber is arranged above the heat exchange cavity, and a heat exchange tube group is installed in the heat exchange cavity. The heat exchange tube group is composed of one or more finned heat exchange tubes, and the finned heat exchange tubes are connected to the combustion chamber. The shell at the top of the heat exchange cavity extends outward to surround the outside of the combustion chamber, and an annular steam chamber is formed between the outer wall of the combustion chamber and the inner wall of the shell. The shell as a whole presents a water tower-like structure with a thick top and a thin bottom. The burner assembly comprises a burner, a fan and an upper cover, wherein the burner and the fan are mounted on the upper cover, the upper cover is detachably mounted on the top of the shell, the burner is mounted in an inverted state in the combustion chamber, the upper cover has an upwardly protruding portion, a gas mixing and pressure stabilizing chamber is formed in the upper cover, a porous distribution plate is arranged between the gas mixing and pressure stabilizing chamber and the burner, a plurality of spoiler columns are arranged in the gas mixing and pressure stabilizing chamber, the spoiler columns are fixed on the inner surface of the upper cover, the spoiler columns extend into the gas mixing and pressure stabilizing chamber, the burner is fixedly mounted on the shell through a burner mounting frame, the burner mounting frame is annular, the longitudinal section of the burner mounting frame is an inverted T-shape, the upper cover has a step-like structure matched with the burner mounting frame, the outer horizontal edge of the burner mounting frame is simultaneously pressed and fixed by the upper cover, the inner horizontal edge of the burner mounting frame serves as the mounting support edge of the burner, and the burner is placed on the inner horizontal edge.

2. The gas steam generator according to claim 1, characterized in that: The outer edge of the upper cover has an annular downwardly turned edge, and the upper cover is buckled and fixed on the top end of the shell.

3. The gas steam generator according to claim 1, characterized in that: A spoiler is installed in the fin heat exchange tube.

4. The gas steam generator according to claim 3, characterized in that: The spoiler comprises a spoiler rod and a spiral spoiler sheet wound around the spoiler rod, and the spoiler extends along the axial direction of the fin heat exchange tube.

5. The gas steam generator according to claim 4, characterized in that: The edge of the spoiler abuts against the inner wall of the fin heat exchange tube.

6. The gas steam generator according to claim 5, characterized in that: A base is provided below the shell, a condensate separation chamber is formed in the base, the other end of the fin heat exchange tube is communicated with the condensate separation chamber, and one end of the spoiler rod extends outwardly into the condensate separation chamber.

7. The gas steam generator according to any one of claims 1 to 6, characterized in that: One or more explosion-proof pipes for connecting the combustion chamber with the outside are arranged on the shell of the annular steam chamber. One end of the explosion-proof pipe body is fixedly connected to the outer wall of the combustion chamber, and the other end of the explosion-proof pipe body is connected to the outside.

8. The gas steam generator according to claim 7, characterized in that: The outer end surface of the explosion relief pipe is an upwardly opening inclined hole, and a cover plate which can be opened and closed automatically is sealed and installed on the outer end surface of the explosion relief pipe.

9. The gas steam generator according to claim 8, characterized in that: The cover plate is a hollow structure, and is filled with heat insulation material in the middle.

10. The gas steam generator according to claim 8, characterized in that: The top of the cover plate is connected to the shell body through a hinge structure so that it can be lifted and rotated, and the cover plate is sealed on the outer end surface of the explosion relief pipe by gravity; Alternatively, the top of the cover plate is rotatably connected to the housing via a rotating shaft, a torsion spring is installed at the rotating shaft, and the cover plate is pressed against the outer end surface of the explosion-proof tube by the elastic force of the torsion spring.

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