Three-return-stroke oil-gas-fired steam boiler

Abstract

The utility model discloses a three return stroke fuel oil gas steam boiler which comprises a boiler body and a boiler furnace, the boiler furnace is installed in the boiler body, one end of the boiler furnace is located in the boiler body and provided with a reversal chamber, the top of the reversal chamber is connected with a two return stroke flue in a penetrating mode, and the other end of the two return stroke flue is located in the boiler body and connected with a front smoke box in a penetrating mode. A third-return-stroke flue is connected to the position, located above the second-return-stroke flue, of the top of the front smoke box in a penetrating mode, a mounting ring is fixedly mounted in the boiler furnace through a first supporting rod, and a shaft rod is connected to the inner side of the mounting ring in a penetrating mode. The utility model has the beneficial effects that the fan blades and the shaft rod are adopted, the shaft rod is rotationally connected with the mounting ring through the bearing, during working, airflow enters the furnace pipe and pushes the fan blades to rotate along the bearing, at the moment, the shaft rod rotates, and the two fan blades rotate simultaneously to disturb the airflow, so that the airflow disturbance efficiency is remarkably improved, sufficient combustion is remarkably promoted, and the service life of the furnace pipe is prolonged. Convective heat transfer is further enhanced, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of power equipment, in particular to a three-pass fuel oil, gas and steam boiler. Background Art

[0002] With the development of the national economy, in order to improve the living environment and adapt to the requirements of environmental protection and energy conservation and emission reduction, the demand for various forms of oil and gas boilers has continued to increase in recent years. In the development of oil and gas industrial boilers, the main oil and gas industrial boiler type produced in my country is a horizontal three-pass wet back fire tube structure. Because of its compact structure, small size, fully assembled factory, small footprint, high degree of automation, it has been favored by enterprises and users and is widely used.

[0003] After deceleration, it was found that the publication number was CN206929755U, and the name was a horizontal three-pass wet back fuel gas steam boiler. The application proposed that this boiler was limited by its structure, the boiler thermal efficiency was low, and the exhaust gas temperature was higher than the saturation temperature, which was very uneconomical for the boiler. With the large-scale use of this type of boiler, a certain degree of waste of my country's oil and gas resources was caused. Through the optimization of structural design, the various components are compact and reasonable, safe and reliable, beautiful in appearance, simple to operate, and easy to maintain, especially the furnace promotes full combustion, thread The smoke tube enhances convective heat transfer and the economizer has high heat exchange efficiency and saves space. However, in actual operation, the raised units on the surface of the furnace are located on the surface of the furnace, and have little effect on the position of the central axis of the furnace, while the airflow entering the furnace is mainly concentrated on the central axis of the furnace. The furnace form used in this application has little disturbance to the airflow and a fast airflow velocity, but its combustion efficiency is not significantly improved, and further improvements can be made. Similarly, the two-pass flue and three-pass flue in this application have little effect on the flue gas velocity, and the heat utilization rate is low, and further improvements can be made.

[0004] Currently, no effective solution has been proposed for the problems in the related technologies. 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 three-pass oil-fired gas steam boiler, which has the advantage of improving working efficiency, thereby solving the problems in the above-mentioned background technology.

[0007] (II) Technical solution

[0008] In order to achieve the above-mentioned advantage of improving work efficiency, the specific technical solution adopted by the utility model is as follows:

[0009] A three-pass oil-fired gas steam boiler comprises a furnace body and a furnace core, wherein a furnace core is installed inside the furnace body, and a reburning chamber is installed at one end of the furnace core located inside the furnace body, and a two-pass flue is connected through the top of the reburning chamber, the other end of the two-pass flue is located inside the furnace body and is connected through a front smoke box, and the top of the front smoke box is located above the two-pass flue and is connected through the three-pass flue, a mounting ring is fixedly installed inside the furnace core through a first support rod, and an axle is connected through the inner side of the mounting ring, and the axle is rotatably connected to the mounting ring through a bearing, fan blades are fixedly installed at both ends of the axle, and baffles are fixedly installed inside the two-pass flue and the three-pass flue, and the baffles are staggered up and down.

[0010] Furthermore, the baffles are distributed at equal intervals and are made of manganese steel.

[0011] Furthermore, the shaft rod, the fan blades and the mounting ring are coaxially arranged with the furnace.

[0012] Furthermore, the furnace core is fixedly connected to a limit ring through a second support rod, and ball grooves are provided on both end surfaces of the limit ring, and steel balls are rollingly connected inside the ball grooves, and the outer surface of the shaft rod is fixedly sleeved with limit plates on both sides of the limit ring, and the limit plates are rollingly abutted against the steel balls.

[0013] Furthermore, a plurality of the first support rods and the second support rods are evenly distributed at angles.

[0014] Furthermore, the shaft, fan blades, mounting ring, first support rod and bearing are all made of tungsten steel.

[0015] Furthermore, the second support rod, the limiting ring, the steel ball and the limiting plate are also made of tungsten steel.

[0016] Furthermore, the shaft rod passes through the limiting ring, and the aperture of the limiting ring is smaller than the diameter of the shaft rod.

[0017] (III) Beneficial effects

[0018] Compared with the prior art, the utility model provides a three-pass fuel oil and gas steam boiler with the following features:

[0019] Beneficial effects:

[0020] (1) The utility model adopts fan blades and a shaft rod, and the shaft rod is rotatably connected to the mounting ring through a bearing. When working, airflow enters the furnace and pushes the fan blades to rotate along the bearing. At this time, the shaft rod rotates, and the two fan blades rotate at the same time to disturb the airflow, thereby significantly improving the disturbance efficiency of the airflow, significantly promoting full combustion, further strengthening convective heat transfer, and improving work efficiency.

[0021] (2) The utility model adopts baffles, which are staggeredly arranged inside the second-pass flue and the third-pass flue. The high-temperature flue gas passing through the furnace enters the second-pass flue through the reburning chamber, and then enters the third-pass flue through the front smoke box. After being deflected by the baffles, the flow path is extended, the convective heat transfer is further enhanced, and the work efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] 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.

[0023] Figure 1 This is a structural schematic diagram of a three-pass fuel oil and gas steam boiler proposed by the utility model;

[0024] Figure 2 It is a schematic diagram of the installation of the fan blades proposed by the utility model;

[0025] Figure 3 It is a structural schematic diagram of the mounting ring proposed by the utility model;

[0026] Figure 4 It is a structural schematic diagram of the limiting ring proposed by the utility model.

[0027] In the figure:

[0028] 1. Furnace body; 2. Furnace core; 3. Recursion chamber; 4. Ball groove; 5. Second return flue; 6. Third return flue; 7. Front smoke box; 8. Baffle; 9. Shaft; 10. Fan blade; 11. Mounting ring; 12. Bearing; 13. First support rod; 14. Second support rod; 15. Limit plate; 16. Steel ball; 17. Limit ring. DETAILED DESCRIPTION

[0029] 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.

[0030] According to an embodiment of the utility model, a three-pass oil-fired gas-steam boiler is provided.

[0031] The present invention is now further described in conjunction with the accompanying drawings and specific implementation methods. Figure 1-4 As shown, a three-pass oil-fired gas steam boiler according to an embodiment of the utility model comprises a furnace body 1 and a furnace liner 2, the furnace body 1 is equipped with a furnace liner 2, and one end of the furnace liner 2 is located inside the furnace body 1 and a reburning chamber 3 is installed, and the top of the reburning chamber 3 is connected with a two-pass flue 5, the other end of the two-pass flue 5 is located inside the furnace body 1 and is connected with a front smoke box 7, and the top of the front smoke box 7 is located above the two-pass flue 5 and is connected with a three-pass flue 6, which are all common structures in the art. Other components matching the furnace body 1 are disclosed equipment, which are not shown in detail in the figure. A mounting ring 11 is fixedly installed inside the furnace liner 2 through a first support rod 13, and the mounting ring 11 is arranged in two groups, and a shaft rod 9 is connected to the inner side of the mounting ring 11, and the shaft rod 9 is rotatably connected to the mounting ring 11 through a bearing 12, and both ends of the shaft rod 9 are fixed The fan blades 10 are fixedly installed, and the baffles 8 are fixedly installed inside the second-pass flue 5 and the third-pass flue 6, and the baffles 8 are arranged alternately up and down. During operation, the airflow enters the furnace 2, pushing the fan blades 10 to rotate along the bearings 12. At this time, the shaft 9 rotates, and the two fan blades 10 rotate at the same time to disturb the airflow, thereby significantly improving the disturbance efficiency of the airflow, significantly promoting full combustion, further strengthening the convective heat transfer, and improving work efficiency. At the same time, the baffles 8 are staggered inside the second-pass flue 5 and the third-pass flue 6. The high-temperature flue gas passing through the furnace 2 enters the second-pass flue 5 through the reburning chamber 3, and then the flue gas enters the third-pass flue 6 through the front smoke box 7. After being deflected by the baffle 8, the flow path is extended, the convective heat transfer is further strengthened, and the work efficiency is improved.

[0032] In one embodiment, the baffles 8 are distributed at equal intervals, and the baffles 8 are made of manganese steel, which is resistant to high temperatures and has a simple and durable structure.

[0033] In one embodiment, the shaft 9, the fan blades 10 and the mounting ring 11 are coaxially arranged with the furnace 2 to facilitate the rotation of the shaft 9 and improve the disturbance efficiency of the axis position.

[0034] In one embodiment, a limiting ring 17 is fixedly connected to the interior of the furnace 2 through a second support rod 14, and ball grooves 4 are provided on both end surfaces of the limiting ring 17, and steel balls 16 are rollingly connected inside the ball grooves 4. The outer surface of the shaft rod 9 is located on both sides of the limiting ring 17 and fixedly sleeved with limiting plates 15, and the limiting plates 15 are rollingly abutted against the steel balls 16. The limiting ring 17 and the limiting plates 15 limit the axial movement of the shaft rod 9 to prevent the axial movement of the shaft rod 9.

[0035] In one embodiment, a plurality of first support rods 13 and second support rods 14 are evenly distributed at angles to improve installation stability.

[0036] In one embodiment, the shaft 9, the fan blades 10, the mounting ring 11, the first support rod 13 and the bearing 12 are all made of tungsten steel, which is resistant to high temperatures and does not deform, thereby extending the service life.

[0037] In one embodiment, the second support rod 14, the limiting ring 17, the steel ball 16, and the limiting plate 15 are also made of tungsten steel, which is resistant to high temperatures and does not deform, thereby extending the service life.

[0038] In one embodiment, the shaft rod 9 passes through the limiting ring 17, and the aperture of the limiting ring 17 is smaller than the diameter of the shaft rod 9, so as to facilitate the passage of the shaft rod 9.

[0039] Working principle:

[0040] During operation, the airflow enters the furnace 2, pushing the fan blades 10 to rotate along the bearings 12. At this time, the shaft 9 rotates, and the two fan blades 10 rotate at the same time to disturb the airflow, thereby significantly improving the disturbance efficiency of the airflow, significantly promoting full combustion, further strengthening the convective heat transfer, and improving work efficiency. At the same time, the baffles 8 are staggeredly arranged inside the two-pass flue 5 and the three-pass flue 6. The high-temperature flue gas passing through the furnace 2 enters the two-pass flue 5 through the reburning chamber 3, and then the flue gas passes through the front smoke box 7 and enters the three-pass flue 6. After being deflected by the baffle 8, the flow path is extended, the convective heat transfer is further strengthened, and the work efficiency is improved.

[0041] 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.

[0042] 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 three-pass oil-fired gas-steam boiler, characterized in that: The invention comprises a furnace body (1) and a furnace core (2), wherein the furnace body (1) is provided with a furnace core (2), and one end of the furnace core (2) is located inside the furnace body (1) and a reburning chamber (3) is installed therein, and the top of the reburning chamber (3) is connected through a two-pass flue (5), and the other end of the two-pass flue (5) is located inside the furnace body (1) and is connected through a front smoke box (7), and the top of the front smoke box (7) is located above the two-pass flue (5) and is connected through a three-pass flue (6). A mounting ring (11) is fixedly mounted inside the furnace (2) via a first support rod (13), and a shaft (9) is connected to the inner side of the mounting ring (11), and the shaft (9) is rotatably connected to the mounting ring (11) via a bearing (12), and fan blades (10) are fixedly mounted on both ends of the shaft (9), and baffles (8) are fixedly mounted inside the second-pass flue (5) and the third-pass flue (6), and the baffles (8) are arranged in an upper and lower staggered manner.

2. A three-pass oil-fired gas steam boiler according to claim 1, characterized in that: The baffles (8) are distributed at equal intervals, and the baffles (8) are made of manganese steel.

3. A three-pass oil-fired gas steam boiler according to claim 1, characterized in that: The shaft rod (9), the fan blades (10) and the mounting ring (11) are coaxially arranged with the furnace (2).

4. A three-pass oil-fired gas steam boiler according to claim 1, characterized in that: The furnace (2) is fixedly connected to a limit ring (17) via a second support rod (14), and both end surfaces of the limit ring (17) are provided with ball grooves (4), and steel balls (16) are rollingly connected inside the ball grooves (4), and the outer surface of the shaft rod (9) is fixedly sleeved with limit plates (15) on both sides of the limit ring (17), and the limit plates (15) are rollingly abutted against the steel balls (16).

5. A three-pass oil-fired gas steam boiler according to claim 4, characterized in that: There are a plurality of first support rods (13) and second support rods (14) distributed at equal angles.

6. A three-pass oil-fired gas steam boiler according to claim 1, characterized in that: The shaft rod (9), the fan blades (10), the mounting ring (11), the first support rod (13) and the bearing (12) are all made of tungsten steel.

7. A three-pass oil-fired gas-steam boiler according to claim 4, characterized in that: The second support rod (14), the limiting ring (17), the steel ball (16) and the limiting plate (15) are also made of tungsten steel.

8. A three-pass oil-fired gas-steam boiler according to claim 4, characterized in that: The shaft rod (9) passes through the limiting ring (17), and the hole diameter of the limiting ring (17) is smaller than the diameter of the shaft rod (9).

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