High efficiency large tonnage steam generator

Abstract

The utility model discloses a kind of high-efficiency large-tonnage steam generators, including furnace body, the inside of furnace body is fixed with first heat recovery coil pipe, the inside of first heat recovery coil pipe is fixed with heating evaporation coil pipe, the top outer wall of furnace body is fixed with burner, the combustion end of burner extends to the center of heating evaporation coil pipe, first heat recovery coil pipe is communicated with heating evaporation coil pipe, first heat recovery coil pipe includes coil pipe one, the inside of coil pipe one is fixed with coil pipe two, the inside of coil pipe two is fixed with coil pipe three. The utility model is installed three-layer finned coil pipe structure of coil pipe one, coil pipe two and coil pipe three in the inside of furnace body, can be sufficient to recover the flame heat generated by burner, realize that water can reach above 90 degrees before entering heating evaporation coil pipe, and then make the efficiency of water vapor formed in heating evaporation coil pipe inside higher, realize that the steam generation amount of water volume less than 30 liters steam generator can reach 3 tons per hour large-tonnage effect.

Description

Technical Field

[0001] This utility model relates to the field of steam generator technology, specifically to a high-efficiency, large-tonnage steam generator. Background Technology

[0002] A steam generator is a mechanical device that uses the thermal energy of fuel or other energy sources to heat water into hot water or steam. It is widely used in industry, daily life and energy fields. Its core function is to heat water to form steam for production use.

[0003] Currently, steam generators exempt from national inspection are typically devices with a water volume of less than 30 liters and a steam generation capacity of less than 2 tons per hour. However, actual production processes often require large-capacity steam generation, rendering these exempt steam generators inadequate for such demands. Therefore, there is an urgent need to design a high-efficiency, large-capacity steam generator to address this issue. Utility Model Content

[0004] The purpose of this invention is to provide a high-efficiency, large-tonnage steam generator to address the aforementioned shortcomings in the prior art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: A high-efficiency, large-tonnage steam generator includes a furnace body. A first heat recovery coil is fixed inside the furnace body, and a heating evaporation coil is fixed inside the first heat recovery coil. A burner is fixed to the top outer wall of the furnace body, and the combustion end of the burner extends to the center of the heating evaporation coil. The first heat recovery coil is connected to the heating evaporation coil. The first heat recovery coil includes a coil one, a coil two is fixed inside the coil one, and a coil three is fixed inside the coil two. The coil one, coil two, and coil three are connected in series.

[0006] Furthermore, a cylinder is fixed to one side of the furnace body, and a second heat recovery coil is fixed inside the cylinder. The furnace body is connected to the cylinder, and an exhaust pipe is welded to the outer wall of one side of the cylinder.

[0007] Furthermore, the water inlet end of the heating evaporation coil extends to the outside of the furnace body and is connected to a hot water inlet pipe. The hot water inlet pipe is connected to the water outlet end of the second heat recovery coil. The air outlet end of the heating evaporation coil extends to the outside of the furnace body and is fixed with an air outlet pipe.

[0008] Furthermore, the water inlet end of the first heat recovery coil extends to the outside of the furnace body and is connected to a cold water inlet pipe, the water outlet end of the first heat recovery coil extends to the outside of the furnace body and is connected to a connecting pipe, and the water inlet end of the second heat recovery coil is connected to the connecting pipe.

[0009] Furthermore, a flow guide is fixed at the center of the second heat recovery coil, and the flow guide is located at the end of the second heat recovery coil near the furnace body.

[0010] Furthermore, the inner wall of the furnace body is provided with a protective layer one, the inner wall of the cylinder is provided with a protective layer two, and the outer wall of the furnace body is provided with a corrosion-resistant layer. The protective layer one includes a heat-insulating layer fixed to the inner wall of the furnace body, and the inner wall of the heat-insulating layer is provided with a high-temperature resistant layer.

[0011] In the above technical solution, the high-efficiency, large-tonnage steam generator provided by this utility model has the following advantages: By installing a three-layer finned coil structure consisting of coil one, coil two, and coil three inside the furnace body, the heat generated by the burner can be fully recovered, ensuring that the water reaches a temperature of over 90 degrees Celsius before entering the heating evaporation coil. This results in higher efficiency of the steam generated inside the heating evaporation coil, enabling the national inspection-free steam generator to achieve a large-tonnage effect of 3 tons per hour. By setting a second heat recovery coil, the heat in the flue gas can be recovered again, and the flow guide can ensure that the flue gas fully contacts the fins on the second heat recovery coil, making the heat utilization efficiency of the steam generator even higher. The insulation layer can prevent a large amount of heat loss from the furnace body, the high-temperature resistant layer can prevent the insulation layer from being burned by high temperatures, and the corrosion-resistant layer can prevent the outer wall of the furnace body from being corroded. Attached Figure Description

[0012] 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.

[0013] Figure 1 This is a schematic diagram of the overall structure of an embodiment of a high-efficiency, large-tonnage steam generator according to the present invention.

[0014] Figure 2 This is a cross-sectional structural diagram of an embodiment of a high-efficiency, large-tonnage steam generator according to the present invention.

[0015] Figure 3 This is an enlarged structural diagram of point A provided for an embodiment of a high-efficiency, large-tonnage steam generator according to this utility model.

[0016] Explanation of reference numerals in the attached figures: 1 Furnace body, 2 First heat recovery coil, 3 Heating evaporation coil, 4 Cylinder, 5 Burner, 6 Cold water inlet pipe, 7 Gas outlet pipe, 8 Exhaust pipe, 9 Connecting pipe, 10 Coil 1, 11 Coil 2, 12 Coil 3, 13 Second heat recovery coil, 14 Protective layer 1, 15 Protective layer 2, 16 Flow guide, 17 Hot water inlet pipe, 18 High temperature resistant layer, 19 Insulation layer, 20 Corrosion resistant layer. Detailed Implementation

[0017] 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.

[0018] like Figure 1-3 As shown in the figure, the present invention provides a high-efficiency large-tonnage steam generator, including a furnace body 1. A first heat recovery coil 2 is fixed inside the furnace body 1. A heating evaporation coil 3 is fixed inside the first heat recovery coil 2. A burner 5 is fixed on the top outer wall of the furnace body 1. The combustion end of the burner 5 extends to the center of the heating evaporation coil 3. The first heat recovery coil 2 is connected to the heating evaporation coil 3. The first heat recovery coil 2 includes a coil 10. A coil 2 11 is fixed inside the coil 10. A coil 3 12 is fixed inside the coil 2 11. The coil 10, coil 2 11 and coil 3 12 are connected in series.

[0019] Specifically, in this embodiment, the furnace includes a furnace body 1, inside which a first heat recovery coil 2 is fixed, and inside the first heat recovery coil 2 a heating evaporation coil 3 is fixed. A burner 5 is fixed to the top outer wall of the furnace body 1, and the combustion end of the burner 5 extends to the center of the heating evaporation coil 3. The burner 5 is a prior art device, and the flame it produces can be sprayed out in all directions, causing the water inside the heating evaporation coil 3 to turn into steam. When a large amount of steam generation is required, the intensity of the flame produced by the burner 5 needs to be increased, i.e., the intensity of the flame needs to be increased. The amount of gas entering the large burner 5 is connected to the first heat recovery coil 2 and the heating evaporation coil 3. At the same time, the inner diameter of the heating evaporation coil 3 is also larger than that of the prior art, so that the gas pressure when steam is generated is maintained within a safe range. The first heat recovery coil 2 includes coil 10, coil 2 11 is fixed inside coil 10, and coil 3 12 is fixed inside coil 2 11. Coil 10, coil 2 11 and coil 3 12 are connected in series. Coil 10, coil 2 11, coil 3 12 and heating evaporation coil 3 are all finned coils.

[0020] This utility model provides a high-efficiency, large-tonnage steam generator. By installing a three-layer finned coil structure consisting of coil 10, coil 21, and coil 312 inside the furnace body 1, the heat generated by the flame of the burner 5 can be fully recovered. This allows the water to reach a temperature of over 90 degrees Celsius before entering the heating evaporation coil 3, thereby increasing the efficiency of the steam generated inside the heating evaporation coil 3. This enables a steam generator with a water volume of less than 30 liters to achieve a steam generation capacity of 3 tons per hour.

[0021] In another embodiment of this utility model, a cylinder 4 is fixed to one side of the furnace body 1, and a second heat recovery coil 13 is fixed inside the cylinder 4. The second heat recovery coil 13 is also a finned coil, and the number of layers of the second heat recovery coil 13 is 2-3, so that the water entering the second heat recovery coil 13 can recover the heat in the flue gas inside the cylinder 4. The furnace body 1 is connected to the cylinder 4, and an exhaust pipe 8 is welded to the outer wall of one side of the cylinder 4. After the flue gas is cooled, it is discharged from the exhaust pipe 8. The water inlet end of the heating evaporation coil 3 extends to the outside of the furnace body 1 and is connected to a hot water inlet pipe 17. The hot water inlet pipe 17 is connected to the water outlet end of the second heat recovery coil 13. The hot water flowing out of the second heat recovery coil 13 enters the heating evaporation coil 3. The gas outlet end of the heating evaporation coil 3 extends to the outside of the furnace body 1 and is fixed to an exhaust pipe 7. The gas generated inside the heating evaporation coil 3... Steam is discharged from the exhaust pipe 7; the water inlet end of the first heat recovery coil 2 extends to the outside of the furnace body 1 and is connected to the cold water inlet pipe 6. During use, the water consumed is replenished through the cold water inlet pipe 6. The water outlet end of the first heat recovery coil 2 extends to the outside of the furnace body 1 and is connected to the connecting pipe 9. The water inlet end of the second heat recovery coil 13 is connected to the connecting pipe 9. Water flows out of the first heat recovery coil 2 and enters the interior of the second heat recovery coil 13. A guide shroud 16 is fixed at the center of the second heat recovery coil 13. The guide shroud 16 is conical and located at the end of the second heat recovery coil 13 closest to the furnace body 1. By setting the second heat recovery coil 13, the heat in the flue gas can be recovered again. Furthermore, the function of the guide shroud 16 is to ensure that the flue gas fully contacts the fins on the second heat recovery coil 13, thereby increasing the heat utilization efficiency of the steam generator.

[0022] In another embodiment of this utility model, the inner wall of the furnace body 1 is provided with a protective layer 14, the inner wall of the cylinder 4 is provided with a protective layer 15, and the outer wall of the furnace body 1 is provided with a corrosion-resistant layer 20. The corrosion-resistant layer 20 is a double corrosion-resistant structure formed by a galvanized layer and rust-preventive oil. Specifically, the outer wall of the furnace body 1 is first galvanized, and then rust-preventive oil is applied to the outer wall of the galvanized layer to enhance the rust-preventive effect of the galvanized material and extend its service life. The protective layer 14 includes a heat insulation layer 19 fixed to the inner wall of the furnace body 1. The inner wall of the heat insulation layer 19 is provided with a high-temperature resistant layer 18. The heat insulation layer 19 is made of rock wool, and the high-temperature resistant layer 18 is made of aluminum silicate refractory fiber. The heat insulation layer 19 can prevent a large amount of heat loss in the furnace body 1, the high-temperature resistant layer 18 can prevent the heat insulation layer 19 from being burned by high temperature, and the corrosion-resistant layer 20 can prevent the outer wall of the furnace body 1 from being corroded.

[0023] Working principle: During operation, cold water enters the first heat recovery coil 2 through the cold water inlet pipe 6. The cold water then flows sequentially through coils 12, 11, and 10 of the first heat recovery coil 2 before flowing into the second heat recovery coil 13 through the connecting pipe 9. The water then flows out of the second heat recovery coil 13 and through the hot water inlet pipe 17 into the heating evaporation coil 3. After the burner 5 is ignited, the flame heats the surrounding heating evaporation coils 3, forming steam. The steam is discharged through the steam outlet pipe 7. Simultaneously, the first heat recovery coil 2 heats the interior of the furnace body 1. The process of heat recovery turns cold water into hot water. The hot air generated by combustion inside the furnace body 1 enters the cylinder 4. The water entering the second heat recovery coil 13 can recover the heat from the hot air inside the cylinder 4 again, so that the water can reach more than 90 degrees Celsius before entering the heating evaporation coil 3. This makes the water vapor generated inside the heating evaporation coil 3 more efficient, with a steam generation capacity of up to 3 tons per hour. Moreover, the water volume of the heating evaporation coil 3 is less than 30 liters, which falls within the current national inspection-free range. Therefore, it can achieve the effect of generating a large amount of steam with a small water volume.

[0024] 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 high-efficiency, large-tonnage steam generator, characterized in that, The furnace includes a furnace body (1), inside which a first heat recovery coil (2) is fixed, inside which a heating evaporation coil (3) is fixed, and on the top outer wall of the furnace body (1) a burner (5) is fixed, the combustion end of the burner (5) extending to the center of the heating evaporation coil (3). The first heat recovery coil (2) is connected to the heating evaporation coil (3). The first heat recovery coil (2) includes a coil one (10), inside which a coil two (11) is fixed, and inside which a coil three (12) is fixed, and the coil one (10), coil two (11) and coil three (12) are connected in series.

2. The high-efficiency, large-tonnage steam generator according to claim 1, characterized in that, A cylinder (4) is fixed on one side of the furnace body (1), and a second heat recovery coil (13) is fixed inside the cylinder (4). The furnace body (1) is connected to the cylinder (4), and an exhaust pipe (8) is welded to the outer wall of one side of the cylinder (4).

3. A high-efficiency, large-tonnage steam generator according to claim 2, characterized in that, The water inlet end of the heating evaporation coil (3) extends to the outside of the furnace body (1) and is connected to a hot water inlet pipe (17). The hot water inlet pipe (17) is connected to the water outlet end of the second heat recovery coil (13). The gas outlet end of the heating evaporation coil (3) extends to the outside of the furnace body (1) and is fixed with a gas outlet pipe (7).

4. A high-efficiency, large-tonnage steam generator according to claim 2, characterized in that, The water inlet end of the first heat recovery coil (2) extends to the outside of the furnace body (1) and is connected to a cold water inlet pipe (6). The water outlet end of the first heat recovery coil (2) extends to the outside of the furnace body (1) and is connected to a connecting pipe (9). The water inlet end of the second heat recovery coil (13) is connected to the connecting pipe (9).

5. A high-efficiency, large-tonnage steam generator according to claim 2, characterized in that, A flow guide (16) is fixed at the center of the second heat recovery coil (13), and the flow guide (16) is located at one end of the second heat recovery coil (13) near the furnace body (1).

6. A high-efficiency, large-tonnage steam generator according to claim 2, characterized in that, The inner wall of the furnace body (1) is provided with a protective layer one (14), the inner wall of the cylinder (4) is provided with a protective layer two (15), the outer wall of the furnace body (1) is provided with a corrosion-resistant layer (20), the protective layer one (14) includes a heat insulation layer (19) fixed to the inner wall of the furnace body (1), and the inner wall of the heat insulation layer (19) is provided with a high-temperature resistant layer (18).

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