Energy-saving furnace utilizing waste heat

Abstract

The utility model discloses a waste heat utilization energy-saving furnace which comprises a closed heating tank, a heating chamber is arranged in the heating tank, an air inlet hole is formed in the top of the heating tank and communicated with the heating chamber, a blowing fan is arranged in the heating tank and arranged at the position of the air inlet hole, and a plurality of circulating air channels are arranged on the inner side wall of the heating tank in an embedded mode. The multiple circulating air channels are annularly arranged on the periphery of the heating cavity, air channel openings in the two ends of each circulating air channel communicate with the heating cavity, one air channel opening is formed in the bottom of the heating cavity, and the other air channel opening is formed in the inner wall of the air inlet hole; according to the utility model, air entering the machine body can be circulated in the machine body and remains for a certain period of time, the heat of the internal heating chamber is effectively preserved, and meanwhile, the temperature of gas circulating in the machine body can be completely heated, so that the temperature of the gas can be easily controlled, and the efficiency of heating a product is higher.

Description

Technical Field

[0001] The utility model relates to the technical field related to energy-saving furnaces, and in particular to an energy-saving furnace that utilizes waste heat. Background Art

[0002] Some heating equipment uses hot air heating, specifically placing items into a heating furnace and heating them with hot air. However, there is no internal structure that can circulate the heat, so the heat utilization rate is low and the heat loss is large.

[0003] There is a biomass pellet fuel drying device with application number CN202420158308.8. This biomass pellet fuel drying device includes a furnace body, a hot air blower installed on the side of the furnace body, a condensation plate and a moisture valve. A stirring mechanism is installed inside the furnace body, and the stirring mechanism includes a storage frame, a rotating shaft and a spiral blade. The rotating shaft passes through the storage frame and the furnace body and is fixedly connected to the motor, and the rotating shaft is rotatably connected to the storage frame. The rotating shaft is located on the outside of the storage frame and is fixedly connected to the spiral blade. The inner walls of the upper furnace cover and the lower furnace cover are fixedly connected to a connecting plate connected to the outside of the storage frame.

[0004] However, the heat loss of the above-mentioned drying device is too large. The products put in are only passed through a single hot air flow and then flow out directly. The external gas enters the machine and remains in the machine for too short a time. Part of the air is not completely heated. Therefore, the temperature of the hot air is not only difficult to control, but also the thermal efficiency is not high. Utility Model Content

[0005] The purpose of the utility model is to provide an energy-saving furnace that utilizes waste heat to overcome the shortcomings of the prior art.

[0006] In order to achieve the above purpose, the present invention provides the following technical solutions:

[0007] An energy-saving furnace for waste heat utilization includes a sealed heating tank, a heating chamber is arranged inside the heating tank, an air inlet is opened on the top of the heating tank and is connected to the heating chamber, a blower fan is provided in the heating tank, and the blower fan is arranged at the air inlet, and a plurality of circulating air ducts are embedded in the inner wall of the heating tank, and the plurality of circulating air ducts are arranged around the outer periphery of the heating chamber, and the air duct openings at both ends of the circulating air duct are connected to the heating chamber, one of the air duct openings is arranged at the bottom of the heating chamber, and the other air duct opening is arranged at the inner wall of the air inlet.

[0008] To further elaborate, the inner wall of the heating tank is fully covered with heating resistance wires.

[0009] To further illustrate, the heating tank includes a positioning cover with an openable top, and the air inlet is arranged in the middle of the positioning cover.

[0010] To further explain, a fixing frame is fixedly provided on the outside of the heating tank, a motor is fixedly provided on the fixing frame, an extension rod is coaxially connected to the rotating shaft of the motor, the end of the extension rod passes through the air inlet hole of the positioning cover and extends into the heating chamber, a roller bearing is fixedly provided on the positioning cover, the extension rod is rotatably connected to the positioning cover through the roller bearing, and the end of the extension rod is fixedly connected to the blower fan.

[0011] To further elaborate, the heating tank is provided with a pressure relief air duct, and a one-way pressure relief valve is provided inside the pressure relief air duct.

[0012] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0013] The utility model can make the incoming air circulate in the body and stay for a certain period of time, effectively keeping the internal heating chamber warm. At the same time, the temperature of the gas circulating inside the body can be fully heated, making it easy to control the temperature of the gas, and making the heating product more efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model;

[0015] Figure 2 It is a partial cross-sectional view of the utility model.

[0016] Description of the accompanying drawings:

[0017] 1. Pressure relief air duct; 2. Positioning cover; 3. Motor; 4. Heating resistor; 5. Fixing bracket; 6. Heating tank; 7. One-way pressure relief valve; 8. Extension rod; 9. Blower fan; 10. Circulating air duct; 11. Heating chamber; 12. Air inlet. DETAILED DESCRIPTION

[0018] To make the above-mentioned objects, features, and advantages of the present invention more clearly understood, the following detailed description of specific embodiments of the present invention is provided in conjunction with the accompanying drawings. The following description sets forth many specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0019] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may also be an element centered thereon. When an element is considered to be "connected" to another element, it may be directly connected to the other element or there may also be an element centered thereon. When the number of an element is referred to as having "plurality", it may be any number of two or more. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0020] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as those commonly understood by those skilled in the art to which this invention pertains. The terms used herein in the specification of this invention are intended solely for the purpose of describing specific embodiments and are not intended to limit this invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0021] The present invention will be described in detail below with reference to the embodiments shown in the accompanying drawings:

[0022] like Figure 1-2 As shown, in this embodiment, an energy-saving furnace for waste heat utilization is provided, comprising a sealed heating tank 6, which has a heating chamber 11 disposed therein. When a product needs to be heated, the product is placed in the heating chamber 11. An air inlet 12 is provided at the top of the heating tank 6, communicating with the heating chamber 11. A blower fan 9 is disposed within the heating tank 6 and is positioned at the air inlet 12. External air is drawn into the heating chamber 11 for circulation as the blower fan 9 rotates. The inner wall of the heating tank 6 is completely covered with heating resistors 4, so that the air circulating inside can be maintained at a constant temperature.

[0023] The reason why circulation is possible is that a plurality of circulating air channels 10 are embedded in the inner wall of the heating tank 6. The plurality of circulating air channels 10 are arranged around the outer periphery of the heating chamber 11. The air channels at both ends of the circulating air channels 10 are connected to the heating chamber 11. One of the air channels is arranged at the bottom of the heating chamber 11, and the other air channel is arranged at the inner wall of the air inlet 12. The incoming air will first flow through the heating resistance wire 4, which has not yet fully risen to the required temperature. Then it will enter the circulating air channel 10 from the air channel opening at the bottom of the heating chamber 11, and then flow back into the heating chamber 11 from the air channel opening near the air inlet 12. Therefore, circulation can be achieved, and the gas will form a steady flow in the heating chamber 11 and flow through the heating resistance wire 4 in an orderly manner. Specifically, because the air will flow into the heating chamber 11 from the air inlet 12, and because the air pressure will be lower where the flow rate is fast, the gas in the circulating air channel 10 will flow back from the top.

[0024] In this embodiment, the heating tank 6 includes a positioning cover 2 with an openable top, and an air inlet 12 is provided in the middle of the positioning cover 2. A fixing frame 5 is fixedly provided on the outside of the heating tank 6, and a motor 3 is fixedly provided on the fixing frame 5. The rotating shaft of the motor 3 is coaxially connected to an extension rod 8. The end of the extension rod 8 passes through the air inlet 12 of the positioning cover 2 and extends into the heating chamber 11. A roller bearing is fixedly provided on the positioning cover 2, and the extension rod 8 is rotatably connected to the positioning cover 2 via the roller bearing. The end of the extension rod 8 is fixedly connected to the blower fan 9.

[0025] In order to prevent excessive gas from filling the heating tank 6 and to prevent the internal air pressure from being too high, a pressure relief airway 1 is provided in the heating tank 6. A one-way pressure relief valve 7 is provided inside the pressure relief airway 1 to release the internal pressure in time.

[0026] The technical features of the above-described embodiments can be combined in any manner. To simplify the description, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there are no contradictions in the combination of these technical features, they should be considered to be within the scope of this specification. For those skilled in the art, without departing from the concept of the utility model, they can also make several variations and improvements, which fall within the scope of protection of the utility model. Therefore, the scope of protection of this utility model patent shall be based on the appended claims.

Claims

1. An energy-saving furnace for waste heat utilization, characterized in that: It includes a sealed heating tank with a heating chamber arranged inside the heating tank, an air inlet opened on the top of the heating tank and connected to the heating chamber, a blower fan is provided in the heating tank and arranged at the air inlet, a plurality of circulating air ducts are embedded in the inner wall of the heating tank, the plurality of circulating air ducts are arranged around the outer periphery of the heating chamber, the air duct openings at both ends of the circulating air duct are connected to the heating chamber, one of the air duct openings is arranged at the bottom of the heating chamber, and the other air duct opening is arranged at the inner wall of the air inlet.

2. The energy-saving furnace for waste heat utilization according to claim 1, characterized in that: The inner wall of the heating tank is fully covered with heating resistance wires.

3. The energy-saving furnace for waste heat utilization according to claim 1, characterized in that: The heating tank comprises a positioning cover with an openable top, and an air inlet is arranged in the middle of the positioning cover.

4. The energy-saving furnace for waste heat utilization according to claim 3, characterized in that: A fixing frame is fixedly provided on the outside of the heating tank, and a motor is fixedly provided on the fixing frame. The rotating shaft of the motor is coaxially connected to an extension rod. The end of the extension rod passes through the air inlet hole of the positioning cover and extends into the heating chamber. A roller bearing is fixedly provided on the positioning cover. The extension rod is rotatably connected to the positioning cover through the roller bearing, and the end of the extension rod is fixedly connected to the blower fan.

5. The energy-saving furnace for waste heat utilization according to claim 1, characterized in that: The heating tank is provided with a pressure relief air duct, and a one-way pressure relief valve is provided inside the pressure relief air duct.

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