Steam boiler waste heat recovery system
By installing a heat exchange box and heat-conducting materials at the flue gas pipe of the steam boiler, the problem of unutilized heat energy in the steam boiler exhaust gas is solved, achieving efficient waste heat recovery and resource conservation.
Patent Information
- Application Number
- CN202520288623.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-21
- Publication Date
- 2026-02-24
- Estimated Expiration
- 2035-02-21
AI Technical Summary
The exhaust gas from existing steam boilers contains a large amount of heat energy that is not being utilized properly, resulting in resource waste. Furthermore, existing waste heat recovery devices are complex in structure and have poor practicality.
Design a waste heat recovery system for a steam boiler. By setting up a heat exchange box at the boiler's flue pipe, and using materials with good thermal conductivity to make heat conduction plates, heat exchange tubes and heat dissipation rods, a continuous fluid flow channel is formed to absorb heat from the exhaust gas and heat water to achieve waste heat recovery.
It achieves simple and practical waste heat recovery, improves heat absorption efficiency, and reduces resource waste.
Smart Images
Figure CN223940045U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of waste heat recovery technology, specifically a waste heat recovery system for a steam boiler. Background Technology
[0002] A steam boiler refers to boiler equipment that produces steam. It is a type of special equipment. Steam boilers can be classified according to fuel type, such as electric steam boilers, oil-fired steam boilers, and gas-fired steam boilers. Waste heat refers to the sensible and latent heat that has not been rationally utilized in the original design of industrial energy-consuming devices that have been put into operation due to limitations in history, technology, and concepts.
[0003] Modern steam boilers produce a large amount of waste gas after combustion, and this waste gas contains a lot of heat energy. If it is not recovered and utilized, it will cause a huge waste of resources. Moreover, some current boiler waste heat recovery devices have complex structures and poor practicality. Utility Model Content
[0004] (a) Technical problems to be solved
[0005] In view of the shortcomings of the prior art, this utility model provides a steam boiler waste heat recovery system to solve the problems mentioned in the background art.
[0006] (II) Technical Solution
[0007] To achieve the above objectives, this utility model provides the following technical solution: a steam boiler waste heat recovery system, comprising a boiler body, a furnace chamber located at the bottom inner side of the boiler body, a feed inlet at the front end of the furnace chamber, a heat-conducting plate fixedly installed at the top of the furnace chamber, a steam chamber located at the top inner side of the boiler body, an exhaust pipe located at the top of the steam chamber, a water inlet pipe located at the top of the boiler body, a valve located at the top of the water inlet pipe, a flue pipe located at the bottom right side of the boiler body, and a heat exchange box fixedly connected to the end of the flue pipe furthest from the boiler body. The heat exchanger has a first mounting hole, a second water inlet pipe at the top, a second valve at the top of the second water inlet pipe, a third water outlet pipe at the bottom, a third heat exchanger hole at the top, a second mounting hole at the top, a second heat exchanger tube fixedly installed inside the second mounting hole, a second flue gas inlet pipe at the bottom of the heat exchanger tube, a third flue gas outlet pipe at the top of the heat exchanger tube, a third mounting hole at the front end of the heat exchanger tube, a third heat dissipation rod fixedly installed inside the third mounting hole, a heat dissipation plate at the front and rear ends of the heat dissipation rod, and an isolation plate at the end of the heat dissipation plate away from the heat dissipation rod.
[0008] Preferably, the end of the flue pipe furthest from the boiler body is fixedly installed in mounting hole one.
[0009] Preferably, the heat-conducting plate, heat exchange pipe, and heat dissipation rod are all made of materials with good thermal conductivity.
[0010] Preferably, the heat exchange tube is composed of several U-shaped pipes connected in sequence, with the ports of each U-shaped pipe connected to form a continuous and regular fluid flow channel.
[0011] Preferably, the smoke inlet pipe is fixedly installed inside the smoke exhaust pipe.
[0012] Preferably, the mounting holes are linearly and uniformly distributed at the front end of the heat exchange tube.
[0013] Preferably, the isolation plates are linearly and uniformly distributed at the end of the heat sink away from the heat sink rod.
[0014] Compared with the prior art, this utility model provides a waste heat recovery system for steam boilers, which has the following beneficial effects:
[0015] This steam boiler waste heat recovery system recovers heat from the exhaust gas by setting a heat exchange box at one end of the boiler's flue pipe. It is not only simple in structure but also highly practical. Attached Figure Description
[0016] Figure 1 This is a three-dimensional structural diagram of the present invention;
[0017] Figure 2 This is a schematic cross-sectional view of the boiler structure of this utility model;
[0018] Figure 3 This is a cross-sectional view of the heat exchanger box of this utility model;
[0019] Figure 4 This is a three-dimensional structural diagram of the heat dissipation pipe of this utility model;
[0020] Figure 5 This is a three-dimensional structural diagram of the heat sink rod of this utility model.
[0021] In the diagram: 1. Boiler body; 2. Heat exchange box; 3. Heat exchange tube; 4. Radiator rod; 101. Furnace; 102. Feed inlet; 103. Heat conduction plate; 104. Steam chamber; 105. Exhaust pipe; 106. Water inlet pipe 1; 107. Valve 1; 108. Flue pipe; 201. Mounting hole 1; 202. Mounting hole 2; 203. Water inlet pipe 2; 204. Valve 2; 205. Water outlet pipe; 206. Valve 3; 301. Mounting hole 3; 302. Flue pipe; 303. Flue pipe; 401. Radiator plate; 402. Isolation plate. Detailed Implementation
[0022] 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.
[0023] like Figure 1-5 As shown, this utility model provides a technical solution: a waste heat recovery system for a steam boiler, including a boiler body 1, a furnace 101 is provided at the bottom inner side of the boiler body 1, a feed inlet 102 is provided at the front end of the furnace 101, a heat conduction plate 103 is fixedly installed on the top of the furnace 101, a steam chamber 104 is provided at the top inside the boiler body 1, an exhaust pipe 105 is provided at the top of the steam chamber 104, a water inlet pipe 106 is provided at the top of the boiler body 1, a valve 107 is provided at the top of the water inlet pipe 106, a flue pipe 108 is provided at the bottom right side of the boiler body 1, and a heat exchange box 2 is fixedly connected to the end of the flue pipe 108 away from the boiler body 1, with an installation opening in the middle of the bottom of the heat exchange box 2. Hole 201; a water inlet pipe 203 is installed at the top of heat exchange box 2; a valve 204 is installed at the top of water inlet pipe 203; a water outlet pipe 205 is installed at the bottom of heat exchange box 2; a valve 306 is installed at the top of water outlet pipe 205; an installation hole 202 is opened at the top of heat exchange box 2; a heat exchange tube 3 is fixedly installed inside the installation hole 202; a flue gas inlet pipe 302 is installed at the bottom of heat exchange tube 3; a flue gas outlet pipe 303 is installed at the top of heat exchange tube 3; an installation hole 301 is opened at the front end of heat exchange tube 3; a heat dissipation rod 4 is fixedly installed inside the installation hole 301; a heat dissipation plate 401 is installed at the front and rear ends of heat dissipation rod 4; an isolation plate 402 is installed at the end of heat dissipation plate 401 away from heat dissipation rod 4.
[0024] Furthermore, the end of the flue pipe 108 furthest from the boiler body 1 is fixedly installed in the mounting hole 201.
[0025] The above technical solution connects the heat exchange box 2 and the boiler body 1 together, making it convenient for the heat exchange box 2 to exchange heat with the exhaust gas generated after combustion inside the furnace 101.
[0026] Furthermore, the heat-conducting plate 103, the heat exchange tube 3, and the heat dissipation rod 4 are all made of materials with good thermal conductivity.
[0027] The above technical solution increases the efficiency of heat absorption by the heat-conducting plate 103, heat exchange tube 3, and heat dissipation rod 4.
[0028] Furthermore, the heat exchange tube 3 is composed of several U-shaped pipes connected in sequence, with the ports of each U-shaped pipe connected to form a continuous and regular fluid flow channel.
[0029] By employing the above technical solution, the contact area between the heat exchange tube 3 and the exhaust gas generated after combustion inside the furnace 101 is increased, thereby increasing the heat absorption efficiency of the heat exchange tube 3.
[0030] Furthermore, the smoke inlet pipe 302 is fixedly installed inside the smoke exhaust pipe 108.
[0031] The above technical solution ensures that the exhaust gas generated after combustion inside the furnace 101 can enter the heat exchange tube 3 through the flue pipe 108.
[0032] Furthermore, mounting holes 301 are linearly and uniformly distributed at the front end of heat exchange tube 3.
[0033] The above technical solution ensures that the exhaust gas generated after combustion inside the furnace 101 can evenly contact the heat dissipation plate 401 and the isolation plate 402.
[0034] Furthermore, the isolation plate 402 is linearly and uniformly distributed at the end of the heat sink 401 away from the heat sink rod 4.
[0035] The above technical solution increases the contact area between the heat sink 401 and hot air and water, thereby increasing the heat dissipation efficiency of the heat sink 401.
[0036] Working principle: First, the steam chamber 104 and the heat exchange box 2 are filled with water through the first water inlet pipe 106 and the second water inlet pipe 203. Then, the combustible material is put into the furnace 101 through the feed port 102 and ignited, which heats the water in the steam chamber 104 to generate steam. The steam is discharged through the exhaust pipe 105. When the combustible material inside the furnace 101 is burning, it will produce exhaust gas. The exhaust gas will enter the heat exchange tube 3 through the flue pipe 108. As the exhaust gas flows continuously inside the heat exchange tube 3, it will continuously contact the inner surface of the heat exchange tube 3 and the heat dissipation rod 4 installed inside the heat exchange tube 3. They will continuously absorb the heat from the exhaust gas to heat the water in the heat exchange box 2. After the water in the heat exchange box 2 is heated, it can be discharged from the heat exchange box 2 through the water outlet pipe 205. Then, the heat exchange box 2 is filled with water again through the second water inlet pipe 203 and heat exchange is performed again.
[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.
Claims
1. A waste heat recovery system for a steam boiler, comprising a boiler body (1), characterized in that: The boiler body (1) has a furnace (101) at the bottom inside. The furnace (101) has a feed inlet (102) at the front end. A heat-conducting plate (103) is fixedly installed on the top of the furnace (101). The boiler body (1) has a steam chamber (104) at the top inside. The steam chamber (104) has an exhaust pipe (105) at the top. The boiler body (1) has a water inlet pipe (106) at the top. The water inlet pipe (106) has a valve (107) at the top. The boiler body (1) has a flue pipe (108) at the bottom right side. A heat exchange box (2) is fixedly connected to the end of the flue pipe (108) away from the boiler body (1). The heat exchange box (2) has an installation hole (201) in the middle of the bottom. The heat exchange box (2) has a water inlet pipe (201) at the top. 03), the top of the water inlet pipe (203) is provided with valve 2 (204), the bottom of the heat exchange box (2) is provided with water outlet pipe (205), the top of the water outlet pipe (205) is provided with valve 3 (206), the top of the heat exchange box (2) is provided with mounting hole 2 (202), the inside of the mounting hole 2 (202) is fixedly installed with heat exchange tube (3), the bottom of the heat exchange tube (3) is provided with flue pipe (302), the top of the heat exchange tube (3) is provided with flue pipe (303), the front end of the heat exchange tube (3) is provided with mounting hole 3 (301), the inside of the mounting hole 3 (301) is fixedly installed with heat dissipation rod (4), the front end and rear end of the heat dissipation rod (4) are provided with heat dissipation plate (401), and the end of the heat dissipation plate (401) away from the heat dissipation rod (4) is provided with isolation plate (402).
2. The waste heat recovery system for a steam boiler according to claim 1, characterized in that: The end of the flue pipe (108) away from the boiler body (1) is fixedly installed in the mounting hole (201).
3. The waste heat recovery system for a steam boiler according to claim 1, characterized in that: The heat-conducting plate (103), heat exchange tube (3) and heat dissipation rod (4) are all made of materials with good thermal conductivity.
4. The waste heat recovery system for a steam boiler according to claim 1, characterized in that: The heat exchange tube (3) is composed of several U-shaped pipes connected in sequence, with the ports of each U-shaped pipe connected to form a continuous and regular fluid flow channel.
5. A steam boiler waste heat recovery system according to claim 1, characterized in that: The inlet pipe (302) is fixedly installed inside the exhaust pipe (108).
6. The waste heat recovery system for a steam boiler according to claim 1, characterized in that: The mounting holes (301) are linearly and uniformly distributed at the front end of the heat exchange tube (3).
7. A steam boiler waste heat recovery system according to claim 1, characterized in that: The isolation plate (402) is linearly and uniformly distributed at the end of the heat sink (401) away from the heat sink rod (4).