A high-efficiency energy-saving waste heat steam boiler

Abstract

The utility model relates to the technical field of waste heat boiler, specifically disclose a kind of high-efficiency energy-saving waste heat steam boiler, including boiler body, waste heat recovery mechanism and chimney, the waste heat recovery mechanism includes cylinder, the inner wall of cylinder is fixedly connected with multiple uniformly distributed baffle, multiple the inner cavity of cylinder is divided into multiple chambers by baffle, except the chamber of uppermost side, two sides of the upper and lower of the inside of the rest chamber are provided with two dispersion disc, multiple evenly distributed heat exchange pipes are communicated between two dispersion discs located in the same chamber, the outer wall of multiple baffle is all through and is provided with through-hole, two dispersion discs between two adjacent chambers are all communicated with the connecting pipe rotationally connected with baffle, the upper end surface of dispersion disc located in the uppermost side is communicated with the air inlet pipe extending to the outside of cylinder, and the heat exchange unit is rotated and multistage countercurrent heat exchange is carried out by water flow, and the efficient recovery and cascade utilization of waste heat are realized under the condition of not needing external power.

Description

Technical Field

[0001] This utility model relates to the field of waste heat boiler technology, and specifically discloses a high-efficiency and energy-saving waste heat steam boiler. Background Technology

[0002] In today's increasingly energy-constrained world, the direct emission of large amounts of high-temperature flue gas generated during industrial production and power generation not only results in enormous energy waste but also leads to thermal pollution. Waste heat boilers are key equipment for recovering these low-grade energy sources and converting them into steam or hot water, playing a vital role in improving overall energy efficiency.

[0003] Currently, most common waste heat boilers employ fixed heat exchange tube bundles, exchanging heat through static contact between flue gas and the working fluid. This traditional structure suffers from the following technical bottlenecks: First, in the static heat exchange mode, the flow of flue gas and working fluid on both sides of the heat exchange tube wall easily forms a stable laminar boundary layer, severely hindering heat conduction. This results in generally low heat exchange efficiency, making it difficult to further reduce the exhaust gas temperature, and a large amount of low-temperature waste heat cannot be effectively recovered. Second, to enhance heat transfer, some improvement schemes use external power devices to increase fluid turbulence. However, this energy consumption offsets some of the recovered waste heat, reducing the system's net benefit and contradicting the initial goal of high efficiency and energy saving. Therefore, a high-efficiency and energy-saving waste heat steam boiler is needed to solve this problem. Utility Model Content

[0004] This invention proposes a high-efficiency and energy-saving waste heat steam boiler, which drives the heat exchange unit to rotate through water flow and performs multi-stage countercurrent heat exchange, achieving efficient recovery and cascade utilization of waste heat without the need for external power.

[0005] This utility model is implemented as follows: a high-efficiency and energy-saving waste heat steam boiler includes a boiler body, a waste heat recovery mechanism, and a chimney. The boiler body has a combustion chamber and a furnace shell inside. The waste heat recovery mechanism includes a cylindrical body. Multiple evenly distributed baffles are fixedly connected to the inner wall of the cylindrical body, dividing the inner cavity of the cylindrical body into multiple chambers. Except for the uppermost chamber, each of the remaining chambers has two dispersing discs on its upper and lower sides. Multiple evenly distributed heat exchange tubes connect the two dispersing discs within the same chamber. Through holes are formed in the outer walls of the baffles. A series of holes connect the two dispersing discs in adjacent chambers. The boiler body is connected to a connecting pipe that is rotatably connected to the partition plate. The upper end face of the uppermost dispersion plate is connected to an air inlet pipe that extends to the outside of the cylinder. The lower end face of the lowermost dispersion plate is connected to an exhaust pipe that extends to the outside of the cylinder. The outer wall of the air inlet pipe is fixedly connected to a plurality of evenly distributed fan blades. The outer wall of the boiler body is connected to a flue pipe that communicates with the combustion chamber. The other end of the flue pipe is connected to the air inlet pipe through a rotating joint. The lower end of the exhaust pipe is connected to an air outlet pipe through a rotating joint. The other end of the air outlet pipe is connected to the chimney. The outer wall of the boiler body is connected to a water outlet pipe that communicates with the furnace shell. The other end of the water outlet pipe is connected to the cylinder.

[0006] As a preferred embodiment of this utility model of a high-efficiency and energy-saving waste heat steam boiler, the through holes on the outer walls of two adjacent partitions are staggered.

[0007] As a preferred embodiment of this utility model of a high-efficiency and energy-saving waste heat steam boiler, the water outlet pipe is tangentially connected to the side wall of the cylinder, and the water flows in along the tangential direction of the inner wall of the cylinder.

[0008] As a preferred embodiment of this utility model of a high-efficiency and energy-saving waste heat steam boiler, the heat exchange tube is made of copper.

[0009] As a preferred embodiment of the high-efficiency and energy-saving waste heat steam boiler of this utility model, the outer wall of the boiler body is connected to a water inlet, and the lower end of the outer wall of the cylinder is connected to a drain outlet.

[0010] As a preferred embodiment of this utility model of a high-efficiency and energy-saving waste heat steam boiler, the outer wall of the boiler body is provided with a heat-insulating and fire-resistant layer.

[0011] The beneficial effects of this utility model are:

[0012] 1. This utility model utilizes the kinetic energy of the boiler's own high-temperature water flow, and through a tangential water inlet design, impacts the fan blades to drive the entire heat exchange unit to rotate continuously within the cylinder. No external power source is required. While achieving energy savings, the disturbance of the internal liquid greatly enhances heat transfer efficiency, realizing highly efficient energy recovery and utilization.

[0013] 2. The cylinder is divided into multiple series chambers by baffles, and staggered through-holes guide the water flow upwards in a tortuous manner, forming a multi-stage counter-current heat exchange with the flue gas flowing downwards. This modular structure significantly extends the heat exchange path and time, achieving deep cooling of the flue gas and tiered utilization of heat, making waste heat recovery more thorough and significantly improving overall thermal efficiency. Attached Figure Description

[0014] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, the elements or parts are not necessarily drawn to scale.

[0015] Figure 1 This is an overall structural diagram of a high-efficiency and energy-saving waste heat steam boiler according to this utility model.

[0016] Figure 2 This is a cross-sectional view of the waste heat recovery mechanism of this utility model.

[0017] Figure 3 This is a diagram showing the internal structure of the cylindrical body of this utility model.

[0018] The markings in the diagram are: 1. Boiler body; 2. Shell; 3. Chimney; 4. Exhaust pipe; 5. Water outlet pipe; 6. Baffle plate; 7. Chamber; 8. Dispersion plate; 9. Heat exchange tube; 10. Connecting pipe; 11. Air inlet pipe; 12. Fan blade; 13. Exhaust pipe; 14. Through hole; 15. Air outlet pipe; 16. Water inlet; 17. Drain outlet. Detailed Implementation

[0019] The present invention will be further described below with reference to the accompanying drawings and specific embodiments to aid in understanding its content. Unless otherwise specified, the methods used in this invention are conventional methods; the raw materials and apparatus used, unless otherwise specified, are conventional commercially available products.

[0020] Please see Figure 1-3A high-efficiency and energy-saving waste heat steam boiler includes a boiler body 1, a waste heat recovery mechanism, and a chimney 3. The boiler body 1 has a combustion chamber and a furnace shell inside. The waste heat recovery mechanism includes a cylinder 2. Multiple evenly distributed baffles 6 are fixedly connected to the inner wall of the cylinder 2. The multiple baffles 6 divide the inner cavity of the cylinder 2 into multiple chambers 7. Except for the uppermost chamber 7, two dispersion plates 8 are arranged on the upper and lower sides of the interior of each of the other chambers 7. Multiple evenly distributed heat exchange tubes 9 are connected between the two dispersion plates 8 located in the same chamber 7. Through holes 14 are opened through the outer walls of the multiple baffles 6. The two dispersion plates 8 in two adjacent chambers 7 are connected to the two dispersion plates 9 connected to the baffles 6. The connecting pipe 10 is dynamically connected to the upper end of the uppermost dispersion plate 8, which is connected to the air inlet pipe 11 extending to the outside of the cylinder 2. The lower end of the lowermost dispersion plate 8 is connected to the exhaust pipe 13 extending to the outside of the cylinder 2. The outer wall of the air inlet pipe 11 is fixedly connected to multiple evenly distributed fan blades 12. The outer wall of the boiler body 1 is connected to the flue pipe 4, which is connected to the combustion chamber. The other end of the flue pipe 4 is connected to the air inlet pipe 11 through a rotating joint. The lower end of the exhaust pipe 13 is connected to the exhaust pipe 15 through a rotating joint. The other end of the exhaust pipe 15 is connected to the chimney 3. The outer wall of the boiler body 1 is connected to the water outlet pipe 5, which is connected to the furnace. The other end of the water outlet pipe 5 is connected to the cylinder 2.

[0021] In this embodiment: the unheated hot water in the boiler body 1 furnace enters the cylinder 2 tangentially through the outlet pipe 5. This water flow impacts and drives the fan blades 12 on the outer wall of the air inlet pipe 11 connected to the dispersion discs 8, causing all the heat exchange units composed of the dispersion discs 8 and heat exchange tubes 9 to rotate continuously within the cylinder 2. Simultaneously, the high-temperature flue gas generated by the boiler enters the air inlet pipe 11 through the exhaust pipe 4 and flows from top to bottom through each layer of rotating dispersion discs 8 and heat exchange tubes 9. During this process, the water flow within the cylinder 2 is divided by multiple baffles 6, flowing upwards in a tortuous path, and undergoing high-intensity dynamic heat exchange with the flue gas in the rotating heat exchange tubes 9. Finally, the fully cooled flue gas is discharged from the chimney 3, while the fully heated high-temperature hot water can be output from the bottom of the cylinder 2. This invention utilizes the kinetic energy of the water flow itself to drive the rotation of the heat exchange units, eliminating the need for external power and resulting in significant energy savings. The rotating heat exchange tubes 9 simultaneously agitate the internal water flow, greatly enhancing heat transfer efficiency, making waste heat recovery more thorough, and achieving high efficiency and energy saving.

[0022] As a technical optimization of this utility model, the through holes 14 on the outer walls of two adjacent partitions 6 are staggered.

[0023] In this embodiment, by staggering the through holes 14 on the outer walls of two adjacent partitions 6, the water flow can be made to meander inside the cylinder 2, thereby increasing the heat exchange time.

[0024] As a technical optimization of this utility model, the water outlet pipe 5 is tangentially connected to the side wall of the cylinder 2, and the water flows in along the tangential direction of the inner wall of the cylinder 2.

[0025] In this embodiment: by causing the water to flow in along the tangential direction of the inner wall of the cylinder 2, the water flow is made to rotate inside the cylinder 2, thereby forming turbulence and efficiently driving the fan blade 12 to rotate.

[0026] As a technical optimization of this utility model, the heat exchange tube 9 is made of copper.

[0027] In this embodiment, by setting the material of the heat exchange tube 9 to copper, efficient heat exchange is facilitated.

[0028] As a technical optimization of this utility model, the outer wall of the boiler body 1 is connected to a water inlet 16, and the lower end of the outer wall of the cylinder 2 is connected to a drain outlet 17.

[0029] In this embodiment: by connecting the water inlet 16 to the outer wall of the boiler body 1, it is convenient to add water to the furnace of the boiler body 1; by connecting the drain outlet 17 to the lower end of the outer wall of the cylinder 2, it is convenient to discharge the heated hot water.

[0030] As a technical optimization of this utility model, the outer wall of the boiler body 1 is provided with a heat-insulating and fire-resistant layer.

[0031] In this embodiment: by setting a heat-insulating and refractory layer on the outer wall of the boiler body 1, the heat loss of the boiler body is effectively reduced to improve thermal efficiency, while the high temperature is isolated to protect the equipment and improve the safety of the working environment.

[0032] The working principle and usage process of this utility model are as follows: Incompletely heated hot water in the boiler body 1's furnace chamber enters the cylinder 2 tangentially through the outlet pipe 5. This water flow impacts and drives the fan blades 12 on the outer wall of the air inlet pipe 11 connected to the dispersion discs 8, causing all the heat exchange units composed of the dispersion discs 8 and heat exchange tubes 9 to rotate continuously within the cylinder 2. Simultaneously, the high-temperature flue gas generated by the boiler enters the air inlet pipe 11 through the exhaust pipe 4 and flows sequentially from top to bottom through each layer of rotating dispersion discs 8 and heat exchange tubes 9. During this process, the water flow within the cylinder 2 is divided by multiple baffles 6, flowing upwards in a tortuous path, engaging in high-intensity dynamic heat exchange with the flue gas within the rotating heat exchange tubes 9. Finally, the fully cooled flue gas is discharged from the chimney 3, while the fully heated high-temperature hot water can be output from the bottom of the cylinder 2.

[0033] In the description of this utility model, it should be understood that the terms "left", "right", "up", "down", "top", "bottom", "front", "back", "inner", "outer", "back", "middle", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0034] However, the above description is only a specific embodiment of this utility model and should not be construed as limiting the scope of implementation of this utility model. Therefore, any substitution of equivalent components or equivalent changes and modifications made in accordance with the scope of protection of this utility model should still fall within the scope of the claims of this utility model.

Claims

1. A high-efficiency and energy-saving waste heat steam boiler, comprising a boiler body (1), a waste heat recovery mechanism, and a chimney (3), wherein the boiler body (1) is provided with a combustion chamber and a furnace shell, characterized in that: The waste heat recovery mechanism includes a cylindrical body (2). Multiple evenly distributed partitions (6) are fixedly connected to the inner wall of the cylindrical body (2). The partitions (6) divide the inner cavity of the cylindrical body (2) into multiple chambers (7). Two dispersion plates (8) are arranged on the upper and lower sides of each chamber (7), except for the uppermost chamber (7). Multiple evenly distributed heat exchange tubes (9) are connected between the two dispersion plates (8) located within the same chamber (7). Through holes (14) are provided through the outer walls of the partitions (6). A connecting pipe (10) rotatably connected to the partitions (6) connects the two dispersion plates (8) in adjacent chambers (7). An extension tube is connected to the upper end face of the uppermost dispersion plate (8). An air inlet pipe (11) is connected to the outside of the cylinder (2). The lower end face of the dispersion plate (8) at the bottommost side is connected to an exhaust pipe (13) extending to the outside of the cylinder (2). Multiple evenly distributed fan blades (12) are fixedly connected to the outer wall of the air inlet pipe (11). The outer wall of the boiler body (1) is connected to a flue pipe (4) that communicates with the combustion chamber. The other end of the flue pipe (4) is connected to the air inlet pipe (11) through a rotating joint. The lower end of the exhaust pipe (13) is connected to an outlet pipe (15) through a rotating joint. The other end of the outlet pipe (15) is connected to the chimney (3). The outer wall of the boiler body (1) is connected to a water outlet pipe (5) that communicates with the furnace. The other end of the water outlet pipe (5) is connected to the cylinder (2).

2. The high-efficiency and energy-saving waste heat steam boiler according to claim 1, characterized in that: The through holes (14) on the outer walls of two adjacent partitions (6) are staggered.

3. The high-efficiency and energy-saving waste heat steam boiler according to claim 1, characterized in that: The water outlet pipe (5) is tangentially connected to the side wall of the cylinder (2), and the water flows in along the tangential direction of the inner wall of the cylinder (2).

4. The high-efficiency and energy-saving waste heat steam boiler according to claim 1, characterized in that: The heat exchange tube (9) is made of copper.

5. The high-efficiency and energy-saving waste heat steam boiler according to claim 1, characterized in that: The outer wall of the boiler body (1) is connected to a water inlet (16), and the lower end of the outer wall of the cylinder (2) is connected to a drain outlet (17).

6. The high-efficiency and energy-saving waste heat steam boiler according to claim 1, characterized in that: The outer wall of the boiler body (1) is provided with a heat-insulating and fire-resistant layer.

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