Furnace waste heat recycling device

Abstract

The utility model relates to the technical field of energy recovery, in particular to a furnace waste heat recycling device which comprises an inner container, a heat preservation shell, a smoke passing pipe and a water inlet and outlet, the heat preservation shell fixedly wraps the outer portion of the inner container, and the smoke passing pipe is connected with the inner container and the heat preservation shell in a penetrating mode. The portion, in the inner container, of the smoke passing pipe is of a conical hollow pipe structure, a sealed cavity is formed between the smoke passing pipe and the inner container, and the water inlet and outlet is communicated with the cavity and fixedly located in the heat preservation shell. According to the device, the whole smoke passing pipe is arranged to be of a conical hollow pipe structure, the connecting pipe is used for being connected with a stove opening, a large amount of smoke heat can be gathered in the thick pipe, the temperature difference between the thick pipe and the cavity is large, heat transfer is better facilitated, smoke in the thick pipe can be promoted to be exhausted through cooperation of the horn pipe and the thin pipe, and the smoke passing pipe is more convenient to use. And the conveying and exchange of the cooled flue gas in the thick pipe are facilitated.

Description

Technical Field

[0001] This utility model relates to the field of energy recovery technology, and in particular to a device for recovering and utilizing waste heat from a furnace. Background Technology

[0002] The high temperature of the flue gas emitted from the stove results in a significant waste of heat energy. To address this issue, existing technology (publication number CN220135496U) discloses a water tank for chimney waste heat recovery and an oven with the same. By absorbing the waste heat from the flue gas, the greenhouse effect is reduced. Furthermore, the water in the tank, after being heated, can be used for cleaning kitchen floors, dishes, etc., making it more environmentally friendly.

[0003] However, the water tank for waste heat recovery from the chimney disclosed above still has the following technical problems during use: because its flue pipe is set as a straight pipe with a uniform diameter, the flue gas goes straight through and does not stay in the flue pipe for long, so the heating efficiency of the water tank is generally low, and the water in the tank generally needs to be heated for a long time before it can be used. Summary of the Invention

[0004] The main purpose of this utility model is to overcome the shortcomings of the existing technology and provide a furnace waste heat recovery and utilization device.

[0005] The technical solution adopted by this utility model to achieve its technical objective is as follows: a furnace waste heat recovery and utilization device, comprising an inner liner, an insulation shell, a flue pipe, and water inlets and outlets. The insulation shell is fixedly wrapped around the outside of the inner liner. The flue pipe passes through and connects the inner liner and the insulation shell. The portion of the flue pipe inside the inner liner is configured as a straight, conical, hollow tube structure, forming a sealed cavity with the inner liner. The water inlets and outlets are connected to the cavity and are fixedly located inside the insulation shell. Water is introduced into the cavity through the water inlets and outlets. The flue gas from the furnace heats the water in the cavity through the flue pipe, and the insulation shell serves to keep the water in the cavity warm.

[0006] Preferably, the flue includes a thick pipe, a trumpet-shaped pipe, a thin pipe, and a connecting pipe;

[0007] The thick tube, the trumpet tube, and the thin tube are sequentially fixed and connected to form a conical hollow tube structure, which is then fixedly installed in the inner liner. The connecting tube is fixedly connected to the thick tube and the thin tube respectively, and is also fixedly connected to the heat insulation shell.

[0008] Preferably, a heat-conducting rod is fixedly connected through the interior of the thicker pipe, with both ends of the heat-conducting rod extending into the cavity. When flue gas passes through the flue pipe, the heat-conducting rod serves two purposes: firstly, it blocks and slows down the flow rate of the flue gas, prolonging its residence time in the thicker section of the flue pipe; secondly, the heat-conducting rod is heated by the flue gas, and the temperature is then transferred to the cavity through its two ends, thereby assisting in heating the water in the cavity and improving heating efficiency.

[0009] Preferably, the conical hollow tube structure has the same length as the cavity of the inner liner 1, wherein the length of the thick tube 301 accounts for 1 / 3 of the cavity length of the inner liner 1, the length of the flared tube 302 accounts for 1 / 30 of the cavity length of the inner liner 1, and the remaining proportion of the cavity length is the proportion of the length of the thin tube 303. The total cavity length of the conical hollow tube structure and the inner liner 1 is set to 900 mm, wherein the length of the thick tube 301 is 300 mm, the length of the flared tube 302 is 30 mm, and the length of the thin tube 303 is 570 mm.

[0010] Preferably, the thick pipe, the thin pipe, and the connecting pipe are all circular pipes. The diameter of the connecting pipe is 104 mm, the diameter of the thick pipe is 133 mm, and the diameter of the thin pipe is 89 mm. The thicker end of the trumpet-shaped pipe has a diameter of 104 mm and is connected to the thick pipe, while the thinner end has a diameter of 89 mm and is connected to the thin pipe.

[0011] Preferably, the system also includes a drain outlet, a water control valve, a pressure relief valve, and a temperature and water level gauge. These components are all connected to the cavity and fixedly located within the insulation shell. When the interior of the inner tank needs cleaning or complete drainage, the liquid in the inner tank is completely drained by opening the drain outlet. The water control valve controls the amount of water stored in the inner tank cavity. The pressure relief valve releases heat from the inner tank cavity during water heating to prevent pressure overload. The temperature and water level gauge monitors the temperature and water level of the water in the inner tank cavity in real time; the water level monitoring can be used in conjunction with the water control valve.

[0012] Preferably, the portion of the flue pipe inside the inner liner is configured as a bent, conical, hollow tube structure.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] This waste heat recovery device for a furnace uses a conical hollow tube structure for the flue pipe. The flue pipe includes a thick tube, a trumpet tube, a thin tube, and a connecting tube. The connecting tube is used to connect to the furnace opening. The thick tube can accumulate more flue gas heat, resulting in a larger temperature difference between the thick tube and the cavity, which is more conducive to heat transfer. The trumpet tube and the thin tube work together to promote the discharge of flue gas in the thick tube, which is conducive to the transport and exchange of cooled flue gas in the thick tube.

[0015] Furthermore, by setting up the heat-conducting rod, on the one hand, the flow speed of the flue gas can be blocked and slowed down, prolonging the residence time of the flue gas in the thicker part of the flue pipe. On the other hand, the heat-conducting rod can be heated by the flue gas, and then the temperature is transferred to the cavity through both ends of the heat-conducting rod, thereby playing a role in assisting in heating the water in the cavity and improving the heating efficiency.

[0016] This waste heat recovery and utilization device for the furnace is equipped with a drain outlet, a water control valve, a pressure relief valve, and a temperature and water level gauge. The drain outlet facilitates the discharge of wastewater after internal cleaning, while the water control valve, pressure relief valve, and temperature and water level gauge can monitor multiple data points of the entire device, increasing the safety of its use.

[0017] This waste heat recovery device can be used not only for washing vegetables and dishes in the kitchen during winter and for replacing electric water heaters for showering in the bathroom, but also for absorption and recycling in facilities such as underfloor heating and warm air systems. It effectively reduces the greenhouse effect, is more environmentally friendly, and can also save on the use of electric water heaters and gas stoves. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the main cross-sectional structure of a furnace waste heat recovery and utilization device.

[0019] Figure 2 This is a three-dimensional structural diagram of the insulation shell, flue pipe, water control valve, and pressure relief valve in a furnace waste heat recovery and utilization device.

[0020] Figure 3 This is a three-dimensional structural diagram of the flue pipe, water inlet / outlet, and sewage outlet in a furnace waste heat recovery and utilization device.

[0021] Figure 4 This is a schematic diagram of the main sectional view of the flue pipe in the waste heat recovery and utilization device of the furnace, which is designed as a bent type.

[0022] Wherein: 1-Inner liner; 2-Insulation shell; 3-Smoke pipe; 301-Thick pipe; 302-Bell pipe; 303-Thin pipe; 304-Connecting pipe; 4-Inlet and outlet; 5-Drain outlet; 6-Water control valve; 7-Pressure relief valve; 8-Temperature level gauge; 9-Heat conduction rod. Detailed Implementation

[0023] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. 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. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0024] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. However, it should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit its scope. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of the present utility model. Example 1:

[0026] Please see Figure 1-3 A furnace waste heat recovery and utilization device includes an inner liner 1, an insulation shell 2, a flue pipe 3, a water inlet and outlet 4, a drain outlet 5, a water control valve 6, a pressure relief valve 7, and a temperature and water level gauge 8.

[0027] The insulation shell 2 is fixedly wrapped around the outside of the inner liner 1. The flue pipe 3 runs through and connects the inner liner 1 and the insulation shell 2. The part of the flue pipe 3 in the inner liner 1 is set as a straight cylindrical conical hollow tube structure, and a sealed cavity is formed between it and the inner liner 1. The inlet and outlet 4, the drain 5, the water control valve 6, the pressure relief valve 7 and the temperature level gauge 8 are all connected to the cavity and are fixed inside the insulation shell 2.

[0028] Water is introduced into the cavity through the inlet / outlet 4. The flue gas from the stove heats the water in the cavity through the flue pipe 3. The insulation shell 2 keeps the water in the cavity warm. When the inside of the inner tank 1 needs to be cleaned or the water needs to be completely drained, the liquid in the inner tank 1 is completely drained by opening the drain port 5. The water control valve 6 controls the amount of water stored in the inner tank 1 cavity. The pressure relief valve 7 is used to release the heat energy in the inner tank 1 cavity when the water is heated to avoid pressure overload. The temperature and water level gauge 8 monitors the water temperature and water level in the inner tank 1 cavity in real time. The water level monitoring can be used in conjunction with the water control valve 6.

[0029] Furthermore, in this embodiment, the flue pipe 3 includes a thick pipe 301, a trumpet pipe 302, a thin pipe 303, and a connecting pipe 304; the thick pipe 301, the trumpet pipe 302, and the thin pipe 303 are sequentially fixed and connected to form a conical hollow pipe structure and then fixedly installed in the inner liner 1. The connecting pipe 304 is fixedly connected to the thick pipe 301 and the thin pipe 303 respectively, and is also fixedly connected to the heat insulation shell 2.

[0030] Furthermore, in this embodiment, the conical hollow tube structure maintains the same length as the cavity of the inner liner 1. The length of the thicker tube 301 accounts for 1 / 3 of the cavity length of the inner liner 1, the length of the flared tube 302 accounts for 1 / 30 of the cavity length of the inner liner 1, and the remaining cavity length is the same as the length of the thinner tube 303. The total cavity length of the conical hollow tube structure and the inner liner 1 is set to 900 mm, with the thicker tube 301 having a length of 300 mm, the flared tube 302 having a length of 30 mm, and the thinner tube 303 having a length of 570 mm.

[0031] Furthermore, in this embodiment, the thick pipe 301, the thin pipe 303, and the connecting pipe 304 are all circular pipes. The diameter of the connecting pipe 304 is set to 104 mm, the diameter of the thick pipe 301 is set to 133 mm, and the diameter of the thin pipe 303 is set to 89 mm. The thicker end of the trumpet pipe 302 has a diameter of 104 mm and is connected to the thick pipe 301, while the thinner end has a diameter of 89 mm and is connected to the thin pipe 303.

[0032] Furthermore, in this embodiment, a heat-conducting rod 9 is fixedly connected through the interior of the thick tube 301, with both ends of the heat-conducting rod 9 extending into the cavity. When flue gas passes through the flue pipe 3, the heat-conducting rod 9 can, on the one hand, block and slow down the flow rate of the flue gas, prolonging the residence time of the flue gas in the thick tube 301 section of the flue pipe 3; on the other hand, the heat-conducting rod 9 can be heated by the flue gas, and then the temperature is transferred to the cavity through both ends of the heat-conducting rod 9, thereby playing a role in assisting in heating the water in the cavity and improving heating efficiency.

[0033] It should be noted that the heat-conducting rod 9 can be used selectively according to actual needs.

[0034] Implementation: 2:

[0035] Please see Figure 1-4 Based on the above embodiments, in this waste heat recovery and utilization device for a furnace, the portion of the flue pipe 3 within the inner liner 1 is configured as a bent conical hollow tube structure. By configuring the flue pipe 3 as a bent conical hollow tube structure, the entire device can be placed horizontally for use in other scenarios, thus improving its applicability.

[0036] The solution in this embodiment can be selectively combined with solutions in other embodiments.

[0037] It should be noted that although the above embodiments have been described herein, this does not limit the scope of patent protection for this utility model. Therefore, any changes and modifications made to the embodiments described herein based on the innovative concept of this utility model, or equivalent structural, procedural, or functional transformations made using the content of this utility model's specification and drawings, directly or indirectly applying the above technical solutions to other related technical fields, are all included within the scope of protection of this utility model patent.

Claims

1. A stove waste heat recycling device, comprising an inner container (1), a heat preservation shell (2), a smoke pipe (3) and an inlet and outlet water port (4), characterized in that: The heat preservation shell (2) is fixedly wrapped outside the inner container (1), the smoke pipe (3) penetrates and connects the inner container (1) and the heat preservation shell (2), the part of the smoke pipe (3) in the inner container (1) is provided as a straight cylinder type conical hollow pipe structure, and a sealed cavity is formed between the smoke pipe (3) and the inner container (1), the water inlet and outlet (4) is connected with the cavity, and is fixed in the heat preservation shell (2).

2. The device according to claim 1, characterized in that: The smoke pipe (3) comprises a thick pipe (301), a horn pipe (302), a thin pipe (303) and a connecting pipe (304). The thick pipe (301), the horn pipe (302) and the thin pipe (303) are sequentially fixedly connected to form a conical hollow pipe structure, and are fixedly installed in the inner container (1), the connecting pipe (304) is fixedly connected to the thick pipe (301) and the thin pipe (303), and is fixedly connected to the heat preservation shell (2).

3. The device according to claim 2, characterized in that: The heat conduction rod (9) is fixedly connected in the thick pipe (301), and both ends of the heat conduction rod (9) extend into the cavity.

4. The device according to claim 2, characterized in that: The conical hollow pipe structure is consistent with the cavity length of the inner container (1), wherein the length of the thick pipe (301) accounts for 1 / 3 of the cavity length of the inner container (1), and the length of the horn pipe (302) accounts for 1 / 30 of the cavity length of the inner container (1).

5. The device according to claim 2, characterized in that: The thick pipe (301), the thin pipe (303) and the connecting pipe (304) are all provided as circular pipes, the diameter of the connecting pipe (304) is 104mm, the diameter of the thick pipe (301) is 133mm, and the diameter of the thin pipe (303) is 89mm.

6. The device according to claim 1, characterized in that: The sewage outlet (5), the water control valve (6), the pressure relief valve (7) and the temperature water level gauge (8) are all connected with the cavity, and are fixed in the heat preservation shell (2).

7. The device according to claim 1, characterized in that: The part of the smoke pipe (3) in the inner container (1) is provided as a bending type conical hollow pipe structure.

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