Small gas full premixing steam generator

Abstract

The utility model discloses a small -size gas full premixing vapor generator, including the outer tube, the inside of outer tube is provided with the inner tube, and the bottom outer wall of inner tube and the bottom inner wall of outer tube are welded with fixed pipe, and the inside insertion of fixed pipe has the burner, and the top inner wall and bottom inner wall of inner tube are welded with the fin straight pipe that is centrally symmetric distribution, and the top outer wall and bottom outer wall of inner tube all are provided with the through -hole that links with fin straight pipe, and the top outer wall welding of outer tube has the steam outlet pipe, and the bottom one side outer wall welding of outer tube has the water inlet pipe. The utility model discloses through welding inner tube in the inside of outer tube, and welding several fin straight pipes in the inside of inner tube, so that the top of multiple fin straight pipes can all steam simultaneously, and further realized the steam generator generation steam efficiency high effect.

Description

Technical Field

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

[0002] A steam generator is a device that heats water into steam and is an indispensable piece of equipment in production. Currently, steam generators typically heat a single spiral heat exchange tube during operation, meaning steam can only flow out from one outlet of that tube, resulting in low steam generation efficiency. Therefore, there is an urgent need to design a small-scale, fully premixed gas-fired steam generator to solve these problems. Summary of the Invention

[0003] The purpose of this invention is to provide a small-scale fully premixed gas steam generator to address the aforementioned shortcomings in the prior art.

[0004] To achieve the above objectives, this utility model provides the following technical solution: A small-scale premixed gas steam generator includes an outer cylinder and an inner cylinder inside the outer cylinder. A fixed pipe is welded between the bottom outer wall of the inner cylinder and the bottom inner wall of the outer cylinder. A burner is inserted into the fixed pipe. Finned straight tubes with central symmetry are welded between the top inner wall and the bottom inner wall of the inner cylinder. Both the top outer wall and the bottom outer wall of the inner cylinder are provided with through holes communicating with the finned straight tubes. A steam outlet pipe is welded to the top outer wall of the outer cylinder, and a water inlet pipe is welded to one side of the bottom outer wall of the outer cylinder.

[0005] Furthermore, a jacket is provided between the outer cylinder and the inner cylinder, and the water inlet pipe is located on one side of the fixed pipe.

[0006] Furthermore, a safety valve and a pressure gauge are respectively connected to the top outer wall of the outer cylinder.

[0007] Furthermore, a vertical pipe is welded to the top outer wall of the inner cylinder, and a finned coil is connected to the top end of the vertical pipe. An exhaust gas outlet pipe is welded to the top outer wall of the outer cylinder, and the end of the finned coil away from the vertical pipe is connected to the exhaust gas outlet pipe.

[0008] Furthermore, the bottom end of the vertical tube is welded to the bottom inner wall of the inner cylinder, and an opening is provided on the outer wall of the vertical tube near the inner wall of the inner cylinder.

[0009] Furthermore, a level gauge is installed on one side of the outer wall of the outer cylinder, and a solenoid valve is connected to the end of the water inlet pipe.

[0010] Furthermore, a premixing fan is bolted to the bottom of the burner.

[0011] Furthermore, the height of the outer cylinder is 500-600mm, and the diameter of the outer cylinder is 300-400mm.

[0012] In the above technical solution, the small premixed gas steam generator provided by this utility model has the following advantages: by welding an inner cylinder inside the outer cylinder and welding several finned straight tubes inside the inner cylinder, steam can be emitted from the top of multiple finned straight tubes simultaneously, thereby achieving a high steam generation efficiency of the steam generator; by setting a jacket between the inner and outer cylinders, the jacket can store water without the need for an additional water tank, achieving a compact and miniaturized steam generator structure; the water inside the jacket can absorb heat from the outer wall of the inner cylinder, achieving a high heat utilization efficiency; the finned coils can further dissipate heat from the flue gas inside the outer cylinder, preventing excessive heat loss; and the openings on the outer wall of the vertical tubes can facilitate flue gas convergence. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in this utility model. For those skilled in the art, other drawings can be obtained based on these drawings.

[0014] Figure 1 This is a schematic diagram of the overall structure of an embodiment of a small-scale premixed gas steam generator according to the present invention.

[0015] Figure 2 This is a schematic diagram of the internal structure of a small-scale premixed gas steam generator according to an embodiment of the present invention.

[0016] Figure 3 This is a schematic diagram of the open port structure provided for an embodiment of a small gas-fired fully premixed steam generator according to the present invention.

[0017] Figure 4 This is a schematic diagram of the jacket structure provided for an embodiment of a small gas-fired fully premixed steam generator according to the present invention.

[0018] Explanation of reference numerals in the attached figures: 1 Outer cylinder, 2 Inner cylinder, 3 Finned straight tube, 4 Through hole, 5 Vertical tube, 6 Open port, 7 Finned coil, 8 Exhaust gas outlet pipe, 9 Steam outlet pipe, 10 Safety valve, 11 Pressure gauge, 12 Liquid level gauge, 13 Burner, 14 Fixed pipe, 15 Water inlet pipe, 16 Solenoid valve, 17 Jacket, 18 Premixed fan. Detailed Implementation

[0019] To enable those skilled in the art to better understand the technical solution of this utility model, the present utility model will be further described in detail below with reference to the accompanying drawings.

[0020] like Figure 1-4 As shown in the figure, a small gas-fired fully premixed steam generator provided by this utility model includes an outer cylinder 1, an inner cylinder 2 inside the outer cylinder 1, a fixed pipe 14 welded between the bottom outer wall of the inner cylinder 2 and the bottom inner wall of the outer cylinder 1, a burner 13 inserted into the fixed pipe 14, finned straight pipes 3 with central symmetry welded between the top inner wall and the bottom inner wall of the inner cylinder 2, and through holes 4 connected to the finned straight pipes 3 on both the top outer wall and the bottom outer wall of the inner cylinder 2, a steam outlet pipe 9 welded to the top outer wall of the outer cylinder 1, and a water inlet pipe 15 welded to one side of the bottom outer wall of the outer cylinder 1.

[0021] Specifically, in this embodiment, an outer cylinder 1 is included, and an inner cylinder 2 is disposed inside the outer cylinder 1. Both the outer cylinder 1 and the inner cylinder 2 are cylindrical. A fixing pipe 14 is welded between the bottom outer wall of the inner cylinder 2 and the bottom inner wall of the outer cylinder 1. The fixing pipe 14 is located at the bottom center of the inner cylinder 2, and the central axes of the inner cylinder 2 and the outer cylinder 1 coincide. A burner 13 is inserted into the fixing pipe 14 and is fixed to the outer cylinder 1. The burner 13 is a conventional columnar burner, and the flame it produces can be directed in all directions. Finned straight tubes 3 are welded between the top inner wall and the bottom inner wall of the inner cylinder 2 in a centrally symmetrical distribution. The burner 13 heats the water inside the multiple finned straight tubes 3, so that the multiple finned straight tubes 3 can produce steam simultaneously. The conventional technology heats the water inside a spiral heat exchange tube to form steam. Because the spiral heat exchange tube is spiral in shape and relatively long, it will cause the spiral heat exchange tube to become spiral in shape and relatively long. The high internal steam pressure of the heat pipe results in a relatively high boiling temperature for the water, and the spiral structure makes steam discharge less smooth. This invention uses a finned straight tube 3, which is shorter than the spiral heat exchange tube. It has the advantages of relatively low internal steam pressure and smooth steam discharge. Furthermore, multiple finned straight tubes 3 can generate steam simultaneously, resulting in high steam generation efficiency. The top and bottom outer walls of the inner cylinder 2 are provided with through holes 4 that communicate with the finned straight tubes 3, allowing water to enter the finned straight tubes 3 from the through holes 4 at the bottom of the inner cylinder 2. A steam outlet pipe 9 is welded to the top outer wall of the outer cylinder 1, through which steam inside the outer cylinder 1 is discharged. The steam outlet pipe 9 also adopts an enlarged diameter design to make steam discharge smoother. A water inlet pipe 15 is welded to one side of the bottom outer wall of the outer cylinder 1, through which water is added to the interior of the outer cylinder 1.

[0022] This utility model provides a small gas-fired fully premixed steam generator. By welding an inner cylinder 2 inside the outer cylinder 1 and welding several finned straight tubes 3 inside the inner cylinder 2, steam can be emitted from the top of the several finned straight tubes 3 at the same time, thereby achieving the effect of high steam generation efficiency of the steam generator.

[0023] In another embodiment of this utility model, a jacket 17 is provided between the outer cylinder 1 and the inner cylinder 2, and the water inlet pipe 15 is located on one side of the fixed pipe 14. By providing a jacket 17 between the inner cylinder 2 and the outer cylinder 1, the jacket 17 can realize the function of water storage without the need for an additional water tank, thus achieving a compact and miniaturized steam generator structure. On the other hand, the water inside the jacket 17 can absorb the heat on the outer wall of the inner cylinder 2, thus achieving a high heat utilization efficiency. A safety valve 10 and a pressure gauge 11 are respectively connected to the top outer wall of the outer cylinder 1. The pressure gauge 11 is used to display the pressure value, and the safety valve 10 prevents the internal pressure of the outer cylinder 1 from being too high.

[0024] In another embodiment of this utility model, a vertical pipe 5 is welded to the top outer wall of the inner cylinder 2, and a finned coil 7 is connected to the top of the vertical pipe 5. The outer wall of the finned coil 7 has several heat dissipation fins. The vertical pipe 5 connects the inner cylinder 2 and the finned coil 7. An exhaust gas outlet pipe 8 is welded to the top outer wall of the outer cylinder 1. The end of the finned coil 7 away from the vertical pipe 5 is connected to the exhaust gas outlet pipe 8. The exhaust gas inside the inner cylinder 2 can enter the finned coil 7 and then be discharged from the exhaust gas outlet pipe 8. The heat in the flue gas can be dissipated through the finned coil 7. The heat is further dissipated inside the outer cylinder 1 to prevent excessive heat loss. The bottom end of the vertical pipe 5 is welded to the bottom inner wall of the inner cylinder 2. An opening 6 is provided on the outer wall of the vertical pipe 5 near the inner wall of the inner cylinder 2. During the operation of the steam generator, the gas pressure is higher closer to the burner 13. At this time, the exhaust gas will flow along the inner wall of the inner cylinder 2 to the opening 6. The vertical pipe 5 has a semi-circular cross-section at the opening 6, which can realize the function of flue gas convergence. A level gauge 12 is installed on one side of the outer wall of the outer cylinder 1. A solenoid valve 16 is connected to the end of the water inlet pipe 15. The opening and closing of the solenoid valve 16 requires control by a host computer. The host computer needs to control the opening and closing of the solenoid valve 16 based on the level data fed back by the level gauge 12, so that the water level inside the outer cylinder 1 is maintained within a set height range. Usually, the water level needs to be lower than the height of the inner cylinder 2 and higher than two-thirds of the height of the inner cylinder 2. The control principle between the level gauge 12, the host computer, and the solenoid valve 16 is existing technology. A premixing fan 18 is bolted to the bottom of the burner 13. The premixing fan 18 achieves the effect of premixing the gas and air, so that the gas burns more completely. The height of the outer cylinder 1 is 500-600mm, and the diameter of the outer cylinder 1 is 300-400mm. Specifically, the height of the outer cylinder 1 is preferably 600mm, and the diameter of the outer cylinder 1 is preferably 325mm, so that the water volume of the entire steam generator is maintained below 50 liters.

[0025] Working principle: During use, water is introduced into the outer cylinder 1 through the water inlet pipe 15, allowing the water to enter the finned straight tube 3 through the through hole 4 at the bottom of the inner cylinder 2. The premixed fan 18 mixes the gas and air and sends it into the burner 13. After the burner 13 is ignited, it heats the outer wall of the finned straight tube 3, causing the water inside the finned straight tube 3 to turn into steam. The steam flows out from the through hole 4 at the top of the inner cylinder 2 and out from the steam outlet pipe 9. The flue gas vertical pipe 5 inside the inner cylinder 2 enters the finned coil 7, allowing the finned coil 7 to further dissipate some of the heat in the flue gas inside the outer cylinder 1. Finally, the flue gas flows out through the exhaust gas outlet pipe 8.

[0026] The foregoing description only illustrates certain exemplary embodiments of the present invention. Undoubtedly, those skilled in the art can modify the described embodiments in various ways without departing from the spirit and scope of the present invention. Therefore, the above drawings and descriptions are illustrative in nature and should not be construed as limiting the scope of protection of the claims of the present invention.

Claims

1. A small-scale fully premixed gas steam generator, characterized in that, The device includes an outer cylinder (1), an inner cylinder (2) is provided inside the outer cylinder (1), a fixed pipe (14) is welded between the bottom outer wall of the inner cylinder (2) and the bottom inner wall of the outer cylinder (1), a burner (13) is inserted into the fixed pipe (14), finned straight tubes (3) with central symmetry are welded between the top inner wall and the bottom inner wall of the inner cylinder (2), and through holes (4) connected to the finned straight tubes (3) are provided on both the top outer wall and the bottom outer wall of the inner cylinder (2), a steam outlet pipe (9) is welded to the top outer wall of the outer cylinder (1), and a water inlet pipe (15) is welded to one side of the bottom outer wall of the outer cylinder (1).

2. A small-scale fully premixed gas steam generator according to claim 1, characterized in that, A jacket (17) is provided between the outer cylinder (1) and the inner cylinder (2), and the water inlet pipe (15) is located on one side of the fixed pipe (14).

3. A small-scale fully premixed gas steam generator according to claim 1, characterized in that, The top outer wall of the outer cylinder (1) is connected to a safety valve (10) and a pressure gauge (11).

4. A small-scale fully premixed gas steam generator according to claim 1, characterized in that, The top outer wall of the inner cylinder (2) is welded with a vertical pipe (5), and the top end of the vertical pipe (5) is connected to a finned coil (7). The top outer wall of the outer cylinder (1) is welded with a waste gas outlet pipe (8), and the end of the finned coil (7) away from the vertical pipe (5) is connected to the waste gas outlet pipe (8).

5. A small-scale fully premixed gas steam generator according to claim 4, characterized in that, The bottom end of the vertical tube (5) is welded to the bottom inner wall of the inner cylinder (2), and an opening (6) is provided on the outer wall of the vertical tube (5) near the inner wall of the inner cylinder (2).

6. A small-scale fully premixed gas steam generator according to claim 1, characterized in that, A level gauge (12) is installed on one side of the outer wall of the outer cylinder (1), and a solenoid valve (16) is connected to the end of the water inlet pipe (15).

7. A small-scale fully premixed gas steam generator according to claim 1, characterized in that, The bottom of the burner (13) is bolted to a premixed fan (18).

8. A small-scale fully premixed gas steam generator according to claim 1, characterized in that, The height of the outer cylinder (1) is 500-600mm, and the diameter of the outer cylinder (1) is 300-400mm.

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