Shell type fuel oil and gas hot water boiler

Abstract

The utility model discloses a boiler shell type fuel oil gas hot water boiler which comprises an outer barrel boiler shell and an inner barrel boiler furnace, the inner barrel boiler furnace is fixedly installed in the center of an inner cavity of the outer barrel boiler shell, an inner cavity of the inner barrel boiler furnace is a combustion chamber, and a heating water cavity is formed between the outer barrel boiler shell and the inner barrel boiler furnace. A front ellipsoid-shaped tube plate is fixedly installed at one end of the outer barrel boiler shell, a smoke gathering chamber is formed between the inner side of the front ellipsoid-shaped tube plate and the side wall of the outer barrel boiler shell, a rear ellipsoid-shaped tube plate is fixedly installed at the other end of the outer barrel boiler shell, and a reversal chamber is formed between the inner side of the rear ellipsoid-shaped tube plate and the side wall of the outer barrel boiler shell. The boiler has the advantages that the outer barrel boiler shell, the inner barrel boiler furnace, the first heat exchange pipe and the second heat exchange pipe are arranged, the heat exchange efficiency of heat generated by oil gas combustion and boiler water can be improved through the first heat exchange pipe, the heat exchange efficiency of high-temperature flue gas and the boiler water is improved through the second heat exchange pipe, and the heat exchange efficiency is improved; and the output efficiency of hot water and hot steam is improved, and the practicability is higher.

Description

Technical Field

[0001] The utility model relates to the technical field of hot water boilers, in particular to a shell type oil-fired gas hot water boiler. Background Art

[0002] The shell boiler is what is commonly known as a fire tube boiler. This type of boiler has a two-layer jacket structure. The outermost cylinder is called the shell, and the inner cylinder is called the furnace. The medium water is in the space between the outer cylinder and the inner cylinder. The inner cylinder is the combustion chamber, and the flue gas flame passes through the inner cylinder. When the boiler is running and pressure is generated, the shell is subjected to internal pressure and the furnace is subjected to external pressure. It is a thermal energy equipment that can use the heat energy released by the combustion of oil and gas fuels to heat water to the rated temperature. A shell-type oil and gas hot water boiler is now mostly used.

[0003] The prior art discloses a shell-type oil-fired gas water-tube boiler with a new heat exchange method, which is disclosed with publication number: CN215765001U, comprising: a furnace body, in which boiler water is arranged; a combustion chamber for generating flue gas with heat; a smoke chamber, an air inlet end of which is connected to the combustion chamber, and an air outlet end of which is connected to the furnace body and discharges the flue gas; a plurality of heat exchange tubes are arranged at intervals, arranged in the smoke chamber, and both ends of which are connected to the smoke chamber and connected to the outside of the smoke chamber, and boiler water flows therein; the heat exchange tubes are finned tubes with fins on the outside for increasing the heat exchange area, and the utility model provides a smoke chamber and a heat exchange tube with fins, so that the smoke enters the smoke chamber and exchanges heat with the boiler water flowing in the heat exchange tube, and the smoke laterally flushes the finned tube, thereby obtaining a higher heat exchange efficiency; the side walls of the smoke chamber are in contact with the boiler water, and heat exchange can also be carried out, thereby further improving the heat exchange efficiency.

[0004] The above utility model contacts the high-temperature flue gas in the smoke chamber through the heat exchange tubes to achieve heat exchange with the boiler water passing through the heat exchange tubes. However, a large amount of heat is also released when the oil and gas burn in the combustion chamber. The heat exchange efficiency of this part of heat and the boiler water is relatively general, thereby reducing the heating efficiency of the boiler water to a certain extent. In addition, the boiler water is only heated by the heat exchange tubes, and the amount of boiler water that can be heated is small, thereby reducing the output efficiency of hot water or hot steam, and the practicality is relatively general. Utility Model Content

[0005] 1. Technical issues to be solved

[0006] In view of the deficiencies in the prior art, the utility model provides a shell-type oil-fired gas hot water boiler, which utilizes a first heat exchange tube to improve the heat exchange efficiency between the heat generated by the combustion of oil and gas and boiler water, and utilizes a second heat exchange tube to improve the heat exchange efficiency between the high-temperature flue gas and boiler water, thereby not only improving the heat exchange efficiency, but also improving the output efficiency of hot water and hot steam, and having the advantage of being more practical, thereby solving the problems in the above-mentioned background technology.

[0007] (2) Technical solution

[0008] In order to achieve the above-mentioned advantage of using the first heat exchange tube to improve the heat exchange efficiency between the heat generated by the combustion of oil and gas and the boiler water, and using the second heat exchange tube to improve the heat exchange efficiency between the high-temperature flue gas and the boiler water, not only the heat exchange efficiency is improved, but also the output efficiency of hot water and hot steam is improved, and it has the advantage of stronger practicality. The specific technical scheme adopted by the utility model is as follows: a shell-type oil-fired gas hot water boiler, comprising an outer cylinder shell and an inner cylinder furnace, the inner cylinder furnace is fixedly installed at the center of the inner cavity of the outer cylinder shell, and the inner cavity of the inner cylinder furnace is a combustion chamber, and a heating water cavity is formed between the outer cylinder shell and the inner cylinder furnace, one end of the outer cylinder shell is fixedly installed with a front ellipsoidal tube sheet, and a smoke gathering chamber is formed between the inner side of the front ellipsoidal tube sheet and the side wall of the outer cylinder shell, and the other end of the outer cylinder shell A rear ellipsoidal tube sheet is fixedly installed, and a backfire chamber is formed between the inner side of the rear ellipsoidal tube sheet and the side wall of the outer tube shell, a burner is installed at one end of the combustion chamber, and the other end of the combustion chamber is connected to a smoke outlet, and the smoke outlet is connected to the inner cavity of the backfire chamber, a plurality of first heat exchange tubes are evenly connected and installed on the side wall of the inner tube furnace, and a plurality of first fin tubes are evenly fixed and installed on the outer wall of the first heat exchange tube, a plurality of smoke chamber tubes are evenly fixed and installed in the inner cavity of the heating water chamber, and one end of the smoke chamber tube is connected to the backfire chamber, and the other end of the smoke chamber tube is connected to the smoke gathering chamber, a plurality of second heat exchange tubes are evenly fixed and installed in the smoke chamber tube, and flares are symmetrically fixed and installed at both ends of the second heat exchange tube, and a plurality of second fin tubes are evenly fixed and installed on the outer wall of the second heat exchange tube.

[0009] Furthermore, a preheating box is fixedly installed on one side of the top surface of the outer drum shell, and a water inlet pipe is installed in the preheating box, and a serpentine heat exchange pipe is installed on the water inlet pipe. One side of the smoke gathering chamber is connected to one end of a smoke conveying pipe, and the other end of the smoke conveying pipe is connected to the inner cavity of the preheating box, and the other side of the inner cavity of the preheating box is connected to a smoke exhaust pipe.

[0010] Furthermore, one side of the top surface of the outer drum shell is connected to a steam outlet pipe.

[0011] Furthermore, a water inlet valve is fixedly installed on the water inlet pipe.

[0012] Furthermore, the central axes of the outer cylinder shell, the inner cylinder furnace, the front ellipsoidal tube sheet and the rear ellipsoidal tube sheet are on the same straight line.

[0013] Furthermore, the cross-sectional shapes of the outer cylinder boiler shell, the inner cylinder furnace and the smoke chamber tube are circular.

[0014] (III) Beneficial effects

[0015] Compared with the prior art, the utility model provides a shell-type oil-fired gas hot water boiler, which has the following beneficial effects:

[0016] (1) The utility model is provided with an outer tube shell, an inner tube furnace, a first heat exchange tube and a second heat exchange tube. When in use, a burner is used to introduce oil and gas fuel into the combustion chamber of the inner tube furnace cavity for combustion. The side wall of the inner tube furnace is evenly connected and installed with a plurality of first heat exchange tubes, and a plurality of first fin tubes are evenly fixedly installed on the first heat exchange tube. When boiler water is injected into the heating water cavity between the outer tube shell and the inner tube furnace, the heat released during the combustion of oil and gas can be preliminarily exchanged with the boiler water through the first heat exchange tube and the first fin tube, thereby realizing the heating of the boiler water. The high-temperature flue gas generated during the combustion process can enter the re-ignition chamber through the smoke outlet for full combustion. The re-ignition chamber is connected with a plurality of smoke chamber tubes installed in the heating water cavity, so the high-temperature flue gas generated can be passed through the smoke outlet. The chamber tube moves, and a plurality of second heat exchange tubes are evenly and fixedly installed in the smoke chamber tube, and the flared openings fixedly installed at both ends of the second heat exchange tube are connected to the heating water cavity, and a plurality of second fin tubes are fixedly installed on the outer wall of the second heat exchange tube. Therefore, when the boiler water passes through the second heat exchange tube and the high-temperature flue gas passes through the smoke chamber tube, the high-temperature flue gas can exchange heat with the boiler water again to achieve reheating of the boiler water, and more fully utilize the heat of the high-temperature flue gas to improve the heat exchange efficiency, so that a shell-type oil-fired gas hot water boiler can utilize the first heat exchange tube to improve the heat exchange efficiency between the heat generated by the combustion of oil and gas and the boiler water, and utilize the second heat exchange tube to improve the heat exchange efficiency between the high-temperature flue gas and the boiler water, which not only improves the heat exchange efficiency, but also improves the output efficiency of hot water and hot steam, and is more practical.

[0017] (2) The utility model is provided with a preheating box and a serpentine heat exchange tube. As described above, after the high-temperature flue gas passes through the smoke chamber tube, it can enter the smoke gathering chamber of the front ellipsoidal tube plate inner cavity and gather, and then be introduced into the inner cavity of the preheating box through the smoke conveying pipe. The inner cavity of the preheating box is provided with a water inlet pipe, and the water inlet pipe is provided with a serpentine heat exchange tube. When boiler water is injected into the water inlet pipe and the serpentine heat exchange tube, and the flue gas moves toward the smoke exhaust pipe through the preheating box, the residual heat in the flue gas can be used to preliminarily preheat the boiler water, so that the heat in the flue gas is more fully utilized, and it is beneficial to improve the heating efficiency of the boiler water, and the utility model is more practical. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a structural schematic diagram of a shell-type oil-fired gas hot water boiler according to an embodiment of the utility model;

[0020] Figure 2 It is a front sectional view of a shell-type oil-fired gas hot water boiler according to an embodiment of the utility model;

[0021] Figure 3 It is a side sectional view of a shell-type oil-fired gas hot water boiler according to an embodiment of the utility model;

[0022] Figure 4 According to the embodiment of the utility model Figure 2 A magnified image of point A;

[0023] Figure 5 According to the embodiment of the utility model Figure 3 Enlarged view of point B.

[0024] In the figure:

[0025] 1. Burner; 2. Front ellipsoidal tube sheet; 3. Outer cylinder shell; 4. Smoke exhaust pipe; 5. Rear ellipsoidal tube sheet; 6. Smoke conveying pipe; 7. Preheating box; 8. Water inlet pipe; 9. Steam outlet pipe; 10. Inner cylinder furnace; 11. Combustion chamber; 12. Smoke outlet; 13. Backfire chamber; 14. First heat exchange tube; 15. Heating water cavity; 16. Smoke chamber tube; 17. Smoke gathering chamber; 18. Serpentine heat exchange tube; 19. First finned tube; 20. Second heat exchange tube; 21. Water inlet valve; 22. Second finned tube; 23. Flaring. DETAILED DESCRIPTION

[0026] To further illustrate each embodiment, the present invention provides drawings, which are part of the disclosure of the present invention and are mainly used to illustrate the embodiments. They can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, ordinary technicians in the field should be able to understand other possible implementation methods and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0027] According to an embodiment of the utility model, a shell-type oil-fired gas hot water boiler is provided.

[0028] The present invention is now further described in conjunction with the accompanying drawings and specific implementation methods. Figure 1-5As shown, a shell-type oil-fired gas hot water boiler according to an embodiment of the utility model comprises an outer cylinder shell 3 and an inner cylinder furnace 10, the inner cylinder furnace 10 is fixedly installed at the center of the inner cavity of the outer cylinder shell 3, and the inner cavity of the inner cylinder furnace 10 is a combustion chamber 11, and a heating water cavity 15 is formed between the outer cylinder shell 3 and the inner cylinder furnace 10, a front ellipsoidal tube sheet 2 is fixedly installed at one end of the outer cylinder shell 3, and a smoke gathering chamber 17 is formed between the inner side of the front ellipsoidal tube sheet 2 and the side wall of the outer cylinder shell 3, a rear ellipsoidal tube sheet 5 is fixedly installed at the other end of the outer cylinder shell 3, and a backfire chamber 13 is formed between the inner side of the rear ellipsoidal tube sheet 5 and the side wall of the outer cylinder shell 3, a burner 1 is installed at one end of the combustion chamber 11, and the other end of the combustion chamber 11 is connected to a smoke outlet 12, and the smoke outlet 12 is connected to the inner cavity of the backfire chamber 13, and the side wall of the inner cylinder furnace 10 is evenly connected to the burner 1. There are a plurality of first heat exchange tubes 14, and a plurality of first fin tubes 19 are evenly fixedly installed on the outer wall of the first heat exchange tube 14, a plurality of smoke chamber tubes 16 are evenly fixedly installed in the inner cavity of the heating water cavity 15, and one end of the smoke chamber tube 16 is connected to the smoke chamber, and the other end of the smoke chamber tube 16 is connected to the smoke gathering chamber 17, a plurality of second heat exchange tubes 20 are evenly fixedly installed in the smoke chamber tube 16, and expansion openings 23 are symmetrically fixedly installed at both ends of the second heat exchange tube 20, and a plurality of second fin tubes 22 are evenly fixedly installed on the outer wall of the second heat exchange tube 20, which can utilize the first heat exchange tube 14 to improve the heat exchange efficiency between the heat generated by the combustion of oil and gas and the boiler water, and utilize the second heat exchange tube 20 to improve the heat exchange efficiency between the high-temperature flue gas and the boiler water, which not only improves the heat exchange efficiency, but also improves the output efficiency of hot water and hot steam, and is more practical.

[0029] In one embodiment, a preheating box 7 is fixedly installed on one side of the top surface of the outer cylinder shell 3, and a water inlet pipe 8 is installed in the preheating box 7, and a serpentine heat exchange tube 18 is installed on the water inlet pipe 8, one side of the smoke gathering chamber 17 is connected to one end of the smoke conveying pipe 6, and the other end of the smoke conveying pipe 6 is connected to the inner cavity of the preheating box 7, and the other side of the inner cavity of the preheating box 7 is connected to the smoke exhaust pipe 4, which plays a role in preliminarily preheating the boiler water by utilizing the waste heat in the flue gas, making more effective use of the heat in the flue gas, and is beneficial to improving the heating efficiency of the boiler water, and is more practical.

[0030] In one embodiment, one side of the top surface of the outer drum shell 3 is connected to a steam outlet pipe 9 for conducting high-temperature hot steam generated by the boiler.

[0031] In one embodiment, a water inlet valve 21 is fixedly installed on the water inlet pipe 8, so that the water inlet valve 21 is opened to guide the boiler water into the heating water chamber 15 only after the boiler water is fully preheated.

[0032] In one embodiment, the central axes of the outer cylinder shell 3, the inner cylinder furnace 10, the front ellipsoidal tube sheet 2 and the rear ellipsoidal tube sheet 5 are on the same straight line.

[0033] In one embodiment, the cross-sectional shapes of the outer cylinder shell 3, the inner cylinder furnace 10 and the smoke chamber tube 16 are circular.

[0034] Working principle: The utility model is provided with an outer tube shell 3, an inner tube furnace 10, a first heat exchange tube 14 and a second heat exchange tube 20. When in use, the burner 1 is used to introduce the oil and gas fuel into the combustion chamber 11 of the inner cavity of the inner tube furnace 10 for combustion. The side wall of the inner tube furnace 10 is evenly connected and installed with a plurality of first heat exchange tubes 14, and a plurality of first fin tubes 19 are evenly fixedly installed on the first heat exchange tube 14. When boiler water is injected into the heating water cavity 15 between the outer tube shell 3 and the inner tube furnace 10, the heat released during the combustion of the oil and gas can be transmitted to the boiler through the first heat exchange tube 14 and the first fin tube 19. The water is preliminarily heat-exchanged to achieve the heating of the boiler water. The high-temperature flue gas generated in the combustion process can enter the re-ignition chamber 13 through the smoke outlet 12 for full combustion. The re-ignition chamber 13 is connected with a plurality of smoke chamber tubes 16 installed in the heating water cavity 15, so the high-temperature flue gas generated can move through the smoke chamber tube 16. A plurality of second heat exchange tubes 20 are evenly fixedly installed in the smoke chamber tube 16, and the expansion ports 23 fixedly installed at both ends of the second heat exchange tube 20 are connected with the heating water cavity 15, and a plurality of second fin tubes 22 are fixedly installed on the outer wall of the second heat exchange tube 20, so when the boiler water passes through When the second heat exchange tube 20 and the high-temperature flue gas pass through the smoke chamber tube 16, the high-temperature flue gas can exchange heat with the boiler water again to achieve reheating of the boiler water, and more fully utilize the heat of the high-temperature flue gas to improve the heat exchange efficiency, so that a shell-type oil-fired gas hot water boiler can utilize the first heat exchange tube 14 to improve the heat exchange efficiency between the heat generated by the combustion of oil and gas and the boiler water, and utilize the second heat exchange tube 20 to improve the heat exchange efficiency between the high-temperature flue gas and the boiler water, which not only improves the heat exchange efficiency, but also improves the output efficiency of hot water and hot steam, and is more practical. In addition, the utility model is provided with a preheating box 7 and a serpentine As mentioned above, the heat exchange tube 18, after the high-temperature flue gas passes through the smoke chamber tube 16, can enter the smoke gathering chamber 17 in the inner cavity of the front ellipsoidal tube plate 2 for gathering, and then be introduced into the inner cavity of the preheating box 7 through the smoke conveying pipe 6. The inner cavity of the preheating box 7 is provided with a water inlet pipe 8, and a serpentine heat exchange tube 18 is installed on the water inlet pipe 8. When boiler water is injected into the water inlet pipe 8 and the serpentine heat exchange tube 18, and the flue gas moves to the exhaust pipe 4 through the preheating box 7, the waste heat in the flue gas can be used to preliminarily preheat the boiler water, so as to make fuller use of the heat in the flue gas, and to improve the heating efficiency of the boiler water, so as to be more practical.

[0035] In the present utility model, unless otherwise clearly stipulated and limited, the terms such as "installation", "setting", "connection", "fixation" and "screw-on" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. Unless otherwise clearly defined, ordinary technicians in this field can understand the specific meanings of the above terms in the utility model according to the specific circumstances.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A shell-type oil-fired gas hot water boiler, comprising an outer shell (3) and an inner furnace (10), characterized in that: An inner tube furnace (10) is fixedly mounted in the center of the inner cavity of the outer tube shell (3), and the inner cavity of the inner tube furnace (10) is a combustion chamber (11), and a heating water chamber (15) is formed between the outer tube shell (3) and the inner tube furnace (10); a front ellipsoid tube sheet (2) is fixedly mounted on one end of the outer tube shell (3), and a smoke gathering chamber (17) is formed between the inner side of the front ellipsoid tube sheet (2) and the side wall of the outer tube shell (3); a rear ellipsoid tube sheet (5) is fixedly mounted on the other end of the outer tube shell (3), and a backfire chamber (13) is formed between the inner side of the rear ellipsoid tube sheet (5) and the side wall of the outer tube shell (3); a burner (1) is mounted on one end of the combustion chamber (11), and the other end of the combustion chamber (11) is connected to a smoke outlet (12). The smoke outlet (12) is connected to the inner cavity of the re-ignition chamber (13); a plurality of first heat exchange tubes (14) are evenly connected and installed on the side wall of the inner tube furnace (10); a plurality of first fin tubes (19) are evenly fixedly installed on the outer wall of the first heat exchange tube (14); a plurality of smoke chamber tubes (16) are evenly fixedly installed on the inner cavity of the heating water chamber (15); one end of the smoke chamber tube (16) is connected to the re-smoke chamber; and the other end of the smoke chamber tube (16) is connected to the smoke collection chamber (17); a plurality of second heat exchange tubes (20) are evenly fixedly installed in the smoke chamber tube (16); expansion ports (23) are symmetrically fixedly installed at both ends of the second heat exchange tube (20); and a plurality of second fin tubes (22) are evenly fixedly installed on the outer wall of the second heat exchange tube (20).

2. A shell-type oil-fired gas hot water boiler according to claim 1, characterized in that: A preheating box (7) is fixedly mounted on one side of the top surface of the outer cylinder shell (3), and a water inlet pipe (8) is mounted inside the preheating box (7), and a serpentine heat exchange pipe (18) is connected to the water inlet pipe (8); one side of the smoke collecting chamber (17) is connected to one end of a smoke conveying pipe (6), and the other end of the smoke conveying pipe (6) is connected to the inner cavity of the preheating box (7); and the other side of the inner cavity of the preheating box (7) is connected to a smoke exhaust pipe (4).

3. A shell-type oil-fired gas hot water boiler according to claim 1, characterized in that: One side of the top surface of the outer cylinder shell (3) is connected to a steam outlet pipe (9).

4. A shell-type oil-fired gas hot water boiler according to claim 2, characterized in that: A water inlet valve (21) is fixedly mounted on the water inlet pipe (8).

5. The shell-type oil-fired gas hot water boiler according to claim 1, characterized in that: The central axes of the outer cylinder shell (3), the inner cylinder furnace (10), the front ellipsoidal tube sheet (2) and the rear ellipsoidal tube sheet (5) are on the same straight line.

6. The shell-type oil-fired gas hot water boiler according to claim 1, characterized in that: The cross-sectional shapes of the outer cylinder boiler shell (3), the inner cylinder furnace (10) and the smoke chamber tube (16) are circular.

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