Boiler waste heat recovery device
By setting up a flue and a heat exchange chamber on the outside of the boiler and using flue gas to exchange heat on the boiler body, the problem of unrecovered boiler exhaust energy is solved, and the thermal efficiency and insulation effect of the boiler are improved.
Patent Information
- Application Number
- CN202420114017.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-17
- Publication Date
- 2025-01-10
- Estimated Expiration
- 2034-01-17
AI Technical Summary
The energy in the boiler exhaust gas cannot be effectively recovered, resulting in a large loss of energy consumption, and the prior art is difficult to improve the thermal efficiency of the boiler.
Design a boiler waste heat recovery device. By setting up multiple flue channels on the outside of the pot body, the flue gas is heat exchanged during the rising process, and heat transfer is carried out multiple times by using the heat exchange chamber and the smoke pipe to recycle and utilize the waste heat, and then use it in the pot. Heat exchange bumps and furnace chamber are installed at the bottom of the body for heating, and combined with the heat insulation cavity to improve the insulation effect.
The waste heat in the flue gas is fully recovered, the thermal efficiency of the boiler is improved, the energy consumption loss is reduced, and the insulation effect is enhanced through the thermal insulation cavity.
Smart Images
Figure CN222335413U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of boiler structures, in particular to a boiler waste heat recovery device. Background Art
[0002] A boiler is an energy conversion device. The energy input to the boiler includes chemical energy and electrical energy in the fuel. The boiler outputs steam, high-temperature water or organic heat carrier with a certain amount of thermal energy. The original meaning of pot refers to a water container heated on fire, and furnace refers to a place where fuel is burned. The boiler consists of two major parts: pot and furnace. The hot water or steam generated in the boiler can directly provide the required thermal energy for industrial production and people's lives, or it can be converted into mechanical energy through a steam power device, or the mechanical energy can be converted into electrical energy through a generator. A boiler that provides hot water is called a hot water boiler, which is mainly used for life and also has a small number of applications in industrial production. A boiler that produces steam is called a steam boiler, often referred to as a boiler, and is mostly used in thermal power plants, ships, locomotives and industrial and mining enterprises.
[0003] Improving the thermal efficiency of boilers is an important means of saving energy. For boilers that use fuel combustion to generate heat energy, the energy in their exhaust gas is relatively high. If it is discharged directly, a lot of energy will be lost. In view of the above problem, the utility model provides a solution. Utility Model Content
[0004] The utility model aims to provide a boiler waste heat recovery device.
[0005] The above technical objectives of the utility model are achieved through the following technical solutions:
[0006] A boiler waste heat recovery device comprises a furnace body, a pot body, a furnace cavity, a smoke outlet, a water inlet and a water outlet, the pot body being installed in the furnace body, the furnace cavity being located at the bottom of the pot body, the bottom of the furnace body being provided with a foot, an independent heat exchange chamber one being provided above the pot body, a heat exchange chamber two being provided above the heat exchange chamber one, the smoke outlet being located above the heat exchange chamber two, a flue being provided on the furnace body outside the pot body, the bottom of the flue being communicated with the furnace cavity, the upper end of the flue being communicated with the heat exchange chamber one, a plurality of vertical water pipes being provided in the heat exchange chamber one, the upper ends of the water pipes being communicated with the heat exchange chamber two, the lower ends of the water pipes being communicated with the pot body, the water inlet being arranged on the side wall of the heat exchange chamber two, a plurality of vertical smoke pipes being provided in the heat exchange chamber two, the lower ends of the smoke pipes being communicated with the heat exchange chamber one, the upper ends of the smoke pipes being communicated with the smoke outlet, and the water outlet being arranged on the outside of the furnace body and communicating with the pot body.
[0007] Furthermore, there are multiple flues evenly distributed in the furnace body outside the pot body. The flues are arranged on the outside of the pot body, and the high-temperature flue gas can transfer part of the heat to the pot body during the rising process.
[0008] Furthermore, a plurality of evenly distributed heat exchange bumps are provided at the bottom of the pot body, and the outer surfaces of the heat exchange bumps are in an arc-shaped structure, so that the heat exchange efficiency is improved by providing the heat exchange bumps.
[0009] Furthermore, a slag cavity is provided at the bottom of the furnace cavity, and a slag leakage groove is provided between the furnace cavity and the slag cavity. The furnace cavity can adopt a variety of chemical fuels for combustion and heating, such as coal, natural gas, etc.
[0010] Furthermore, a heat-insulating cavity is provided on the outer shell of the furnace body. Preferably, the heat-insulating cavity can be set to a low vacuum, or evacuated to improve its heat-insulating effect.
[0011] In summary, the utility model has the following beneficial effects: the utility model arranges the flue on the outside of the pot body, so that when the smoke rises, the pot body can be heat exchanged once. After the smoke passes through the heat exchange chamber one, the water in the water pipe is heated. After the smoke enters the smoke pipe in the heat exchange chamber two, the water in the heat exchange chamber two is heat exchanged, and then the smoke is discharged through the smoke outlet, so that the waste heat in the smoke is fully recovered and utilized. BRIEF DESCRIPTION OF THE DRAWINGS
[0012] Figure 1 It is a schematic diagram of the overall structure of the utility model;
[0013] Figure 2 It is a structural schematic diagram of the combustion chamber part of the utility model;
[0014] Figure 3 It is a schematic diagram of the bottom of the pot body of the utility model;
[0015] Figure 4 It is a structural schematic diagram of the top heat exchange cavity of the utility model.
[0016] In the figure, 1. furnace body; 2. pot body; 3. furnace cavity; 4. slag cavity; 5. heat exchange cavity one; 6. heat exchange cavity two; 7. smoke outlet; 8. water inlet; 9. water outlet; 10. smoke pipe; 11. water pipe; 12. insulation cavity; 13. flue; 14. base; 15. heat exchange protrusion. DETAILED DESCRIPTION
[0017] The utility model is further described in detail below in conjunction with the accompanying drawings, and the technical solutions in the embodiments of the utility model are clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0018] like Figure 1-4As shown, a boiler waste heat recovery device comprises a furnace body 1, a pot body 2, a furnace cavity 3, a smoke outlet 7, a water inlet 8 and a water outlet 9, wherein the pot body 2 is installed in the furnace body 1, the furnace cavity 3 is located at the bottom of the pot body 2, a foot 14 is provided at the bottom of the furnace body 1, an independent heat exchange cavity 1 5 is provided above the pot body 2, a heat exchange cavity 2 6 is provided above the heat exchange cavity 1 5, the smoke outlet 7 is located above the heat exchange cavity 2 6, a flue 13 is provided on the furnace body 1 outside the pot body 2, and the bottom of the flue 13 is connected to the heat exchange cavity 2 6. The furnace cavity 3 is connected, the upper end of the flue 13 is connected to the heat exchange cavity 1 5, a plurality of vertical water pipes 11 are arranged in the heat exchange cavity 1 5, the upper ends of the water pipes 11 are connected to the heat exchange cavity 2 6, the lower ends of the water pipes 11 are connected to the pot body 2, the water inlet 8 is arranged on the side wall of the heat exchange cavity 2 6, a plurality of vertical smoke pipes 10 are arranged in the heat exchange cavity 2 6, the lower ends of the smoke pipes 10 are connected to the heat exchange cavity 1 5, the upper ends of the smoke pipes 10 are connected to the smoke outlet 7, and the water outlet 9 is arranged on the outside of the furnace body 1 and connected to the pot body 2.
[0019] Further, such as Figure 2 As shown, there are multiple flues 13 evenly distributed in the furnace body 1 outside the pot body 2. The flue 13 is arranged on the outside of the pot body 2, and the high-temperature flue gas can partially transfer heat to the pot body 2 during the rising process.
[0020] Further, such as Figure 3 As shown, a plurality of evenly distributed heat exchange bumps 15 are provided at the bottom of the pot body 2. The outer surface of the heat exchange bumps 15 is in an arc-shaped structure. The heat exchange efficiency is improved by providing the heat exchange bumps 15.
[0021] Furthermore, a slag cavity 4 is provided at the bottom of the furnace cavity 3 , and a slag leakage groove is provided between the furnace cavity 3 and the slag cavity 4 . The furnace cavity 3 can be heated by combustion using a variety of chemical fuels, such as coal, natural gas, etc.
[0022] Further, such as Figure 1 As shown, a heat-insulating cavity 12 is provided on the outer shell of the furnace body 1. Preferably, the heat-insulating cavity 12 can be set to a low vacuum, or evacuated to improve its heat preservation effect.
[0023] Working principle: When the fuel is burned in the furnace cavity and the generated flue gas passes through the flue, the flue gas can perform a heat exchange on the boiler body as it rises. After the flue gas passes through the heat exchange chamber one, it heats the water in the water pipe. After the flue gas enters the smoke pipe in the heat exchange chamber two, it exchanges heat with the water in the heat exchange chamber two, and then is discharged through the smoke outlet, fully recycling the waste heat in the flue gas. At the same time, an insulating cavity is set on the furnace body to effectively reduce the heat exchange between the overall furnace body and the outside.
[0024] This specific embodiment is merely an explanation of the present invention and is not a limitation of the present invention. After reading this specification, those skilled in the art may make non-creative modifications to the present embodiment as needed, but such modifications are protected by patent law as long as they are within the scope of the claims of the present invention.
Claims
1. A boiler waste heat recovery device, comprising a furnace body (1), a pot body (2), a furnace cavity (3), a smoke outlet (7), a water inlet (8) and a water outlet (9), wherein the pot body (2) is installed in the furnace body (1), the furnace cavity (3) is located at the bottom of the pot body (2), and the bottom of the furnace body (1) is provided with a foot (14), characterized in that: An independent heat exchange chamber 1 (5) is provided above the pot body (2), a heat exchange chamber 2 (6) is provided above the heat exchange chamber 1 (5), the smoke outlet (7) is located above the heat exchange chamber 2 (6), a flue (13) is provided on the furnace body (1) outside the pot body (2), the bottom of the flue (13) is connected to the furnace chamber (3), the upper end of the flue (13) is connected to the heat exchange chamber 1 (5), and a plurality of vertical water pipes (11) are provided in the heat exchange chamber 1 (5). The upper end of the water pipe (11) is connected to the second heat exchange chamber (6), the lower end of the water pipe (11) is connected to the pot body (2), the water inlet (8) is arranged on the side wall of the second heat exchange chamber (6), a plurality of vertical smoke pipes (10) are arranged in the second heat exchange chamber (6), the lower end of the smoke pipe (10) is connected to the first heat exchange chamber (5), the upper end of the smoke pipe (10) is connected to the smoke outlet (7), and the water outlet (9) is arranged on the outside of the furnace body (1) and connected to the pot body (2).
2. A boiler waste heat recovery device according to claim 1, characterized in that: The flues (13) are multiple in number and are evenly distributed in the furnace body (1) outside the pot body (2).
3. A boiler waste heat recovery device according to claim 2, characterized in that: The bottom of the pot body (2) is provided with a plurality of evenly distributed heat exchange protrusions (15), and the outer surfaces of the heat exchange protrusions (15) are in an arc-shaped structure.
4. A boiler waste heat recovery device according to claim 3, characterized in that: A slag cavity (4) is provided at the bottom of the furnace cavity (3), and a slag leakage groove is provided between the furnace cavity (3) and the slag cavity (4).
5. A boiler waste heat recovery device according to claim 4, characterized in that: A heat-insulating cavity (12) is provided on the outer shell of the furnace body (1).