A new energy-saving smokeless boiler
By adopting an inclined zigzag channel and vertical connecting pipe heat exchanger design in a coal-fired boiler, the problems of flue ash accumulation and low heat exchange efficiency are solved, achieving efficient heat exchange and automatic ash removal, thereby improving boiler operating efficiency and equipment maintenance convenience.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- 尚鸿雁
- Filing Date
- 2025-06-13
- Publication Date
- 2026-06-05
AI Technical Summary
Existing coal-fired boiler flue designs are prone to ash accumulation, and the horizontal structure results in insufficient water-fire contact area, leading to low heat exchange efficiency and difficulty in cleaning ash during combustion.
The heat exchange device adopts a special structure, including inclined zigzag channels and vertical connecting pipes, combined with an inclined grate design, to achieve efficient heat exchange and automatic ash removal. The zigzag channel has a large contact area with water, and the heat in the flue gas is absorbed by the water in the water storage chamber. The accumulated ash automatically slides off in the channel, making it easy to clean.
It improves heat exchange efficiency, reduces ash accumulation, achieves efficient operation of smokeless boilers, and reduces equipment maintenance difficulty and operating costs.
Smart Images
Figure CN224327347U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of boiler technology, and in particular to a new type of energy-saving smokeless boiler. Background Technology
[0002] Coal-fired boilers are among the most common types of boilers on the market. They are extremely popular among users due to their advantages such as simple structure, few auxiliary equipment, flexible layout, low cost, and small footprint. Existing vertical coal-fired boilers are mainly composed of a boiler drum, an inner liner, and flue pipes. The inner liner contains components such as a grate and water pipes. The boiler drum has a coal inlet and a slag outlet, and water outlet and return pipes on both sides. In addition, the boiler drum also has a fire observation door and a water level gauge.
[0003] The flues inside existing boilers are mainly serpentine. Although the contact area between water and fire is large, the pipes are mostly horizontal, making them prone to ash accumulation inside. Utility Model Content
[0004] This utility model proposes a new type of energy-saving smokeless boiler to solve the above-mentioned problems.
[0005] The technical solution of this utility model is implemented as follows:
[0006] A novel energy-saving smokeless boiler includes a first cylinder, with a heat exchange device installed in the center of the first cylinder. A water storage cavity is formed between the heat exchange device and the first cylinder. An inlet pipe and an outlet pipe connected to the inner cavity of the water storage cavity are fixed on the outer wall of the first cylinder. A flue pipe extending through the upper surface of the first cylinder is provided at the top of the heat exchange device. A second cylinder is welded to one side of the first cylinder. A combustion chamber is provided at the bottom of the second cylinder. A coal storage hopper for storing block fuel is provided above the combustion chamber. The combustion chamber is connected to the lower end of the heat exchange device through a connecting channel. A first grate is fixed at the bottom of the combustion chamber. A first ash removal chamber door and an adjusting fire door are provided on the side wall of the second cylinder. The first ash removal chamber door is connected to the space below the first grate, and the adjusting fire door is connected to the space above the first grate. A cylindrical chamber connected to the connecting channel is formed at the lower end of the heat exchange device. A vertically reciprocating zigzag channel is formed at the upper end of the heat exchange device. A cylindrical chamber connecting the zigzag channel and the exhaust pipe is formed at the upper end of the heat exchange device. A second ash removal chamber door connected to the lower inner cavity of the heat exchange device is formed on the side wall of the lower end of the first cylinder.
[0007] Furthermore, the coal storage cylinder is a conical cylinder that is larger at the top and smaller at the bottom. The upper end of the second cylinder is formed with a filling hole that communicates with the inner cavity of the coal storage cylinder. A sealing cap for sealing the filling hole is rotatably installed on the upper end of the second cylinder at the location corresponding to the filling hole of the coal storage cylinder.
[0008] Furthermore, the zigzag channel of the heat exchange device is an inclined plane, and the zigzag channel of the heat exchange device is connected by several vertically arranged connecting pipes, which are welded to the outside of each bending area.
[0009] Furthermore, the water inlet pipe is fixed to the lower side wall of the first cylinder, and the water outlet pipe is fixed to the upper end of the first cylinder.
[0010] Furthermore, one end of the first grate plate is inclined downwards and toward the connecting channel, and the end of the first grate plate near the connecting channel is lower than the connecting channel.
[0011] Furthermore, a second grate is fixed inside the heat exchange device near the connecting channel, and the second grate is located at a lower position at the connection point of the connecting channel.
[0012] The beneficial effects of this utility model by adopting the above technical solution are as follows: the heat exchange device with a special structure has a large contact area with water, which facilitates the improvement of heat exchange efficiency; coal combustion and heat exchange occur in two cylinders, and the temperature inside the heat exchange device will decrease during the heat exchange process, while the temperature inside the combustion chamber will be high, eliminating the need for a blower, as the high-temperature flue gas will automatically flow into the heat exchange device for heat exchange; the first grate is inclined, allowing coal to automatically slide and collapse during the combustion process, creating space, which facilitates the automatic drop of coal from the coal storage cylinder to fill the gap, thus achieving automatic fuel replenishment. Attached Figure Description
[0013] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0014] Figure 1 This is a cross-sectional view of the present invention;
[0015] Figure 2 This is a perspective view of the present invention;
[0016] Figure 3 This is a perspective view of the present invention;
[0017] Figure 4 This is the front view of this utility model;
[0018] Figure 5 This is a reference diagram showing the usage state of this utility model.
[0019] The annotations in the attached figures are explained as follows:
[0020] 1. First cylinder; 2. Second cylinder; 3. Heat exchanger; 4. Coal storage hopper; 5. Sealing cover; 6. Water storage chamber; 7. Connecting pipe; 8. Exhaust pipe; 9. Water inlet pipe; 10. Water outlet pipe; 11. Combustion chamber; 12. First grate; 13. Connecting channel; 14. Second grate; 15. First ash removal chamber door; 16. Adjusting fire door; 17. Second ash removal chamber door. Detailed Implementation
[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0022] like Figures 1-5As shown, a novel energy-saving smokeless boiler includes a first cylindrical body 1. A heat exchange device 3 is installed in the center of the first cylindrical body 1. A water storage cavity 6 is formed between the heat exchange device 3 and the first cylindrical body 1, enclosing the heat exchange device 3. A flue pipe 8 is installed at the top of the heat exchange device 3, extending through the upper surface of the first cylindrical body 1. A second cylindrical body 2 is welded to one side of the first cylindrical body 1. A combustion chamber 11 is located at the bottom of the second cylindrical body 2. The top of the combustion chamber 11 is semi-circular to concentrate heat and accelerate temperature rise. A useful... In the coal storage hopper 4, which stores block fuel, the combustion chamber 11 is connected to the lower end of the heat exchange device 3 via a connecting channel 13. A first grate 12 is fixed at the bottom of the combustion chamber 11. Coal is burned above the first grate 12, and the slag produced during combustion falls below it through the screen holes of the first grate 12. A first ash removal chamber door 15 and a regulating fire door 16 are provided on the side wall of the second cylinder 2. The first ash removal chamber door 15 connects to the space below the first grate 12 to facilitate the cleaning of the slag below the first grate 12. The regulating fire door 16 connects to... The oxygen intake in the space above the first grate 12 can be adjusted by changing the size of the opening, thereby controlling the combustion speed of the coal. A higher oxygen intake results in faster and more complete combustion, while a lower oxygen intake leads to slower and less complete combustion. The lower end of the heat exchanger 3 has a cylindrical chamber connected to the connecting channel 13, facilitating the rapid entry of high-temperature flue gas. The upper end of the heat exchanger 3 has a vertically reciprocating zigzag channel made of smooth stainless steel. Each channel section has an inclination angle of 10-20°. The design features a large contact area with water and a vertically reciprocating zigzag design, which occupies little space and facilitates rapid heat exchange. At the same time, during the water inlet and outlet process, the water can cause the heat exchange device 3 to vibrate, and the dust in the flue gas can easily slide down to the bottom of the heat exchange device 3, making it easy to open the second ash removal chamber door 17 for cleaning. The upper end of the heat exchange device 3 is formed with a cylindrical chamber that connects the zigzag channel and the flue pipe 8, and the lower side wall of the first cylinder 1 is formed with a second ash removal chamber door 17 that connects to the lower inner cavity of the heat exchange device 3.
[0023] As a preferred embodiment of this utility model, the regulating fire door 16 has two sides, symmetrically arranged on both sides of the second cylinder 2, to regulate the ventilation volume and oxygen supply.
[0024] In this embodiment, the coal storage cylinder 4 is a conical cylinder that is larger at the top and smaller at the bottom. When coal falls automatically inside the coal storage cylinder 4, the amount of coal falling automatically each time can be reduced. When the coal in the combustion chamber 11 collapses due to combustion, the coal in the coal storage cylinder 4 can fall automatically to fill the gap. If coal gets stuck at the lower end of the coal storage cylinder 4, the regulating fire door 16 can be opened, and the coal stuck at the lower end of the coal storage cylinder 4 can be dislodged using an iron stick. The upper end of the second cylinder 2 is formed with a filling hole that communicates with the inner cavity of the coal storage cylinder 4. A sealing cover 5 is rotatably installed at the upper end of the second cylinder 2 corresponding to the filling hole of the coal storage cylinder 4 to seal the filling hole. The sealing cover 5 is provided with a handle. By opening and closing the sealing cover 5, coal can be added to the coal storage cylinder 4.
[0025] In this embodiment, the zigzag channel of the heat exchange device 3 is an inclined slope. The zigzag channel of the heat exchange device 3 is connected by several vertically arranged connecting pipes 7. The connecting pipes 7 are welded to the outside of each bending area. The connecting pipes 7 can not only reinforce and support the zigzag channel, but also allow the hot air at the lower end of the heat exchange device 3 to quickly enter the upper end of the heat exchange device 3, so that the water at the upper end of the water storage chamber 6 can also quickly become hot through heat exchange.
[0026] In this embodiment, an inlet pipe 9 and an outlet pipe 10 connected to the inner cavity of the water storage chamber 6 are fixed on the outer wall of the first cylinder 1. The inlet pipe 9 is fixed on the lower side wall of the first cylinder 1, and the outlet pipe 10 is fixed on the upper end of the first cylinder 1. By connecting a water circulation system to the inlet pipe 9 and the outlet pipe 10, the water in the water storage chamber 6 can be replaced, which facilitates the improvement of heat exchange effect and provides a continuous supply of hot water.
[0027] In this embodiment, one end of the first grate 12 is downward and inclined towards the connecting channel 13. The end of the first grate 12 near the connecting channel 13 is lower than the connecting channel 13, which facilitates the use of the side wall of the first cylinder 1 to block coal. The inclined second grate 12 allows coal falling from the coal storage cylinder 4 to automatically slide down the inclined first grate 12 towards the connecting channel 13. The heat generated by the coal burning at the connecting channel 13 can quickly enter the heat exchange device 3 through the flue gas channel. At the same time, the heat generated by the coal combustion can also be quickly absorbed by the water inside the water storage chamber 6. The burning coal is far away from the regulating fire door 16, which can reduce the loss from the regulating fire door 16. The inclined first grate 12 allows the air entering from the outside to quickly contact the coal near the connecting channel 13 to supply oxygen, so that it can burn completely.
[0028] In this embodiment, a second grate plate 14 is fixed inside the heat exchange device 3 near the connecting channel 13. The second grate plate 14 is located at the lower part of the connection of the connecting channel 13, and the second grate plate 14 is 5-10mm lower than the bottom of the connecting channel 13. The second grate plate 14 can be used to block coal that accidentally falls from the coal storage hopper 4 and passes through the connecting channel 13 under the action of inertia, so as to prevent it from falling into the heat exchange device 3 and extinguishing due to lack of air. When the coal is on the second grate plate 14, it is suspended above and below, close to the connecting channel 13, which facilitates combustion.
[0029] The working principle of this utility model is as follows:
[0030] In use, lumpy coal is poured into the coal storage hopper 4. Because the coal storage hopper 4 is cone-shaped with a larger top and a smaller bottom, the coal is easily stuck at the lower end of the hopper 4 and will not fall onto the first grate plate 12 quickly. A water injection pipe is connected to the water inlet pipe 9 to fill the water storage chamber 6. At this time, the low-temperature water will surround the heat exchange device 3, pushing some of the coal onto the first grate plate 12 for ignition. The heat generated by the coal combustion enters the heat exchange device 3 through the connecting channel 13, and hot air flows from the heat exchange device 3 into the flue pipe 8. The heat in the flue gas is absorbed by the water in the water storage chamber 6, turning it into hot water. At the same time, the flue gas temperature decreases. The slag produced by coal combustion falls through the mesh of the first grate 12 and falls below it. Opening the first grate 12 allows for the cleaning of the slag. Because the flue gas has a long circulation time in the zigzag channel and the zigzag channel has a large contact area with the water, the heat absorption efficiency of the water can be improved. Meanwhile, the ash accumulated in the heat exchange device 3 is easy to spontaneously combust and slide to the bottom of the heat exchange device 3 in the inclined zigzag channel, making it easy to clean.
[0031] Components not described in detail in this article are existing technologies.
[0032] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.
Claims
1. A novel energy-saving smokeless boiler, characterized in that: The system includes a first cylinder (1), a heat exchange device (3) installed in the center of the first cylinder (1), a water storage cavity (6) formed between the heat exchange device (3) and the first cylinder (1), a flue pipe (8) extending through the upper surface of the first cylinder (1) is provided at the top of the heat exchange device (3), a second cylinder (2) is welded to one side of the first cylinder (1), a combustion chamber (11) is provided at the bottom of the second cylinder (2), a coal storage hopper (4) for storing block fuel is provided above the combustion chamber (11), and the combustion chamber (11) and the lower end of the heat exchange device (3) are connected by a connecting channel (1). 3) Connecting, the bottom of the combustion chamber (11) is fixed with a first grate plate (12), the second cylinder (2) is provided with a first ash removal chamber door (15) and an adjusting fire door (16) on the side wall, the lower end of the heat exchange device (3) is formed with a cylindrical cavity connected to the connecting channel (13), the upper end of the heat exchange device (3) is formed with a vertical reciprocating zigzag channel, the upper end of the heat exchange device (3) is formed with a cylindrical cavity connecting the zigzag channel and the exhaust pipe (8), and the lower side wall of the first cylinder (1) is formed with a second ash removal chamber door (17) connected to the lower inner cavity of the heat exchange device (3).
2. The novel energy-saving smokeless boiler according to claim 1, characterized in that: The coal storage cylinder (4) is a conical cylinder with a larger top and a smaller bottom. The upper end of the second cylinder (2) is formed with a filling hole that communicates with the inner cavity of the coal storage cylinder (4). A sealing cap (5) is rotatably installed on the upper end of the second cylinder (2) corresponding to the filling hole of the coal storage cylinder (4) to seal the filling hole.
3. The novel energy-saving smokeless boiler according to claim 1, characterized in that: The heat exchange device (3) has a zigzag channel with an inclined slope. The zigzag channel of the heat exchange device (3) is connected by several vertically arranged connecting pipes (7). The connecting pipes (7) are welded to the outside of each bend area.
4. A novel energy-saving smokeless boiler according to claim 1, characterized in that: The outer wall of the first cylinder (1) is fixed with an inlet pipe (9) and an outlet pipe (10) that connect to the inner cavity of the water storage chamber (6). The inlet pipe (9) is fixed on the lower side wall of the first cylinder (1), and the outlet pipe (10) is fixed on the upper end of the first cylinder (1).
5. A novel energy-saving smokeless boiler according to claim 1, characterized in that: One end of the first grate plate (12) is inclined downward and toward the connecting channel (13), and the end of the first grate plate (12) near the connecting channel (13) is lower than the connecting channel (13).
6. A novel energy-saving smokeless boiler according to claim 1, characterized in that: The heat exchange device (3) has a second grate plate (14) fixed inside near the connection channel (13), and the second grate plate (14) is located at the lower part of the connection of the connection channel (13).