Energy-saving leather drying box

Abstract

The utility model discloses an energy-saving leather drying box, relates to the field of leather processing, and aims to solve the problem that in the prior art, air and heat energy in a drying box are directly discharged through an exhaust fan, and the heat energy in the discharged air cannot be recycled, so that the heat energy is wasted. A rectangular air inlet is formed in the upper end face of the drying box, a heating box is connected to the upper end face of the drying box and located at the upper end of the rectangular air inlet, an air inlet fan is fixedly connected to the middle of the upper end of the heating box, an air inlet pipe is fixedly connected to the upper end of the air inlet fan, an air preheating box is fixedly connected to the middle of the air inlet pipe, and an air distributing cover and an air collecting cover are fixedly connected to the end faces of the two sides of the air preheating box correspondingly. An air outlet is formed in the lower end of the end face of one side of the drying box, an exhaust fan is connected to the outer portion of the air outlet, and by arranging the air preheating box, heat in high-temperature waste gas exhausted by the drying box can be recycled, fresh air entering the drying box is preheated, and energy consumption of the electric heating pipe is remarkably reduced.

Description

Technical Field

[0001] This utility model relates to the field of leather processing, specifically an energy-saving leather drying box. Background Technology

[0002] Leather is a natural material made from animal hides through tanning, preservation, and dyeing processes. It possesses properties such as flexibility, abrasion resistance, and breathability. Its raw materials primarily come from the hides of animals such as cattle, sheep, and pigs. After pretreatments such as hair removal, liming, and softening, it undergoes processes like vegetable tanning, chrome tanning, or oil tanning to stabilize the collagen fibers, forming a durable material that is not easily perishable. Leather surfaces can retain their original texture or undergo embossing. Types include full-grain leather, corrected-grain leather, and suede, and it is widely used in the production of shoes, bags, clothing, furniture, and automotive interiors. High-end leathers such as calfskin and crocodile skin are considered luxury items due to their exquisite texture, while recycled leather utilizes scraps for environmentally friendly processing. Regenerated leather requires drying in a drying oven during processing.

[0003] For example, patent announcement number CN222294101U discloses an energy-saving drying oven for dry leather production. The oven includes a drying chamber with positioning mechanisms on both sides of its interior. A drive motor is fixedly installed on one side of the drying chamber, and a transmission rod is fixedly installed at the output end of the drive motor. One end of the transmission rod is fixedly connected to the middle of the back of one of the positioning mechanisms. This energy-saving drying oven for dry leather production, through the arrangement of an exhaust fan, a blower fan, and heating wires, allows the operator to connect the heating wires during the drying process. The heating wires then emit heat that is transported through a through-groove into the drying chamber. The operator can then connect the blower fan and the exhaust fan, allowing heat to be transferred from the blower fan to the leather surface, and the exhaust fan removes the heat, achieving uniform drying of the leather.

[0004] The aforementioned technology directly exhausts the air and heat from inside the drying chamber using an exhaust fan, resulting in the inability to recover the heat energy from the exhaust air and thus wasting heat energy. Therefore, there is an urgent need in the market to develop an energy-saving leather drying chamber to help people solve the existing problems. Utility Model Content

[0005] The purpose of this utility model is to provide an energy-saving leather drying box to solve the problem mentioned in the background art that the air and heat energy inside the drying box are directly discharged by the exhaust fan, and the heat energy in the discharged air cannot be recovered, resulting in heat energy waste.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an energy-saving leather drying box, comprising a drying box, a rectangular air inlet provided in the middle of the upper end face of the drying box, a heating box connected to the upper end face of the drying box above the rectangular air inlet, an air intake fan fixedly connected to the middle of the upper end of the heating box, an air intake pipe fixedly connected to the upper end of the air intake fan, an air preheating box fixedly connected to the middle of the air intake pipe, a gas distribution hood and a gas collection hood fixedly connected to the two end faces of the air preheating box respectively, an air outlet provided at the lower end of one end face of the drying box, an exhaust fan connected to the outside of the air outlet, and a conveying pipe connecting the exhaust fan side and the gas distribution hood side.

[0007] Preferably, a leather hanging rack is fixedly installed inside the drying box, and multiple electric heating tubes are fixedly connected inside the heating box.

[0008] Preferably, rectangular openings are provided on both ends of the air preheating box, and the inner sides of the air distribution hood and the air collection hood are respectively connected to the two rectangular openings on both ends of the air preheating box.

[0009] Preferably, a gas distribution plate is fixedly connected between the gas distribution hood and the rectangular opening on one side of the air preheating box, and a gas collecting plate is fixedly connected between the rectangular opening on the other side of the air preheating box and the gas collecting hood.

[0010] Preferably, a plurality of heat exchange tubes are fixedly connected between the air distribution plate and the air collection plate and inside the air preheating box. One side of the plurality of heat exchange tubes is connected to the inside of the air distribution hood, and the other side of the plurality of heat exchange tubes is connected to the inside of the air collection hood.

[0011] Preferably, an exhaust pipe is fixedly connected to the side of the gas collecting hood away from the air preheating box.

[0012] Preferably, one side of the exhaust fan is fixedly connected to one end face of the drying chamber.

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

[0014] (1) In this utility model, by setting up an air preheating box and heat exchange tube structure, the heat in the high-temperature exhaust gas discharged from the drying box can be recovered and utilized to preheat the fresh air entering the drying box, significantly reducing the energy consumption of the electric heating tube and improving the energy utilization rate.

[0015] (2) In this utility model, the gas distribution hood and the gas collection hood are used in conjunction with the gas distribution plate and the gas collection plate to make the hot air evenly distributed to multiple heat exchange tubes, thereby improving the heat exchange efficiency and avoiding the problems of local overheating or uneven heat exchange.

[0016] (3) In this utility model, the air inside the drying oven is circulated and renewed through the coordinated work of the exhaust fan and the intake fan, which not only ensures the drying efficiency but also reduces the waste of heat energy. The overall structure is compact, energy-saving and environmentally friendly. Attached Figure Description

[0017] Figure 1 This is a front view of an energy-saving leather drying box according to the present invention;

[0018] Figure 2 This is a main sectional view of the air preheating box of this utility model;

[0019] Figure 3 This is a side sectional view of the air preheating box of this utility model;

[0020] Figure 4 This is a detailed enlarged view of part A of this utility model.

[0021] In the diagram: 1. Drying oven; 101. Leather rack; 102. Rectangular air inlet; 103. Air outlet; 2. Heating box; 201. Electric heating element; 202. Air inlet fan; 203. Air inlet pipe; 3. Air preheating box; 301. Rectangular opening; 302. Air distribution hood; 303. Air distribution plate; 304. Air collection hood; 305. Air collection plate; 306. Heat exchange tube; 307. Exhaust pipe; 4. Exhaust fan; 401. Conveying pipe. 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 of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0023] Please see Figure 1-4This utility model provides an embodiment of an energy-saving leather drying oven, comprising a drying oven 1, a leather hanging rack 101 fixedly installed inside the drying oven 1, a rectangular air inlet 102 located in the middle of the upper surface of the drying oven 1, a heating box 2 connected to the upper surface of the drying oven 1 above the rectangular air inlet 102, a plurality of electric heating tubes 201 fixedly connected inside the heating box 2, an air intake fan 202 fixedly connected to the middle of the upper surface of the heating box 2, an air intake pipe 203 fixedly connected to the upper surface of the air intake fan 202, and an air outlet 1 located at the lower end of one side surface of the drying oven 1. 03. An exhaust fan 4 is connected to the outside of the air outlet 103. One side of the exhaust fan 4 is fixedly connected to one end face of the drying chamber 1. The leather is hung inside the drying chamber 1 through the leather hanger 101 and the door of the drying chamber 1 is closed. The air in the heating chamber 2 is drawn in by the air inlet fan 202 through the air inlet pipe 203 and sent into the heating chamber 2. The air is heated by multiple electric heating tubes 201 inside the heating chamber 2 and then sent into the drying chamber 1 through the rectangular air inlet 102 to dry the leather. The exhaust fan 4 simultaneously discharges the relatively humid air inside the drying chamber 1 to the outside.

[0024] Please see Figure 2 and Figure 4An air preheating box 3 is fixedly connected to the middle of the air inlet duct 203. A distribution hood 302 and a collection hood 304 are fixedly connected to the two end faces of the air preheating box 3, respectively. Rectangular openings 301 are provided on both end faces of the air preheating box 3. The inner sides of the distribution hood 302 and the collection hood 304 communicate with the two rectangular openings 301 on the two end faces of the air preheating box 3, respectively. A distribution plate 303 is fixedly connected between the distribution hood 302 and the rectangular opening 301 on one end face of the air preheating box 3. A gas collecting plate 305 is fixedly connected between the rectangular opening 301 on the other end face of the gas collecting hood 304 and the air preheating box 3. Multiple heat exchange tubes 306 are fixedly connected between the gas distribution plate 303 and the gas collecting plate 305, and inside the air preheating box 3. One side of the multiple heat exchange tubes 306 communicates with the inside of the gas distribution hood 302, and the other side of the multiple heat exchange tubes 306 communicates with the inside of the gas collecting hood 304. One side of the exhaust fan 4 and one side of the gas distribution hood 302 are connected by a conveying pipe 401. Next, the exhaust fan 4 delivers heated air from inside the air preheating box 3 to the air distribution hood 302 via the delivery pipe 401. The air distribution plate 303 inside the air distribution hood 302 disperses the heated air into multiple heat exchange tubes 306. The heated air heats the multiple heat exchange tubes 306 as it flows inside them. When external air enters the air inlet pipe 203 and is delivered to the heating box 2, it first enters the air preheating box 3. The external air flows inside the air preheating box 3 and contacts the outer wall of the multiple heat exchange tubes 306 to achieve heat exchange, thus preheating the air before it enters the heating box 2 for further heating. This achieves heat recovery and reduces the energy consumption of the heating box 2. The heated air flowing inside the multiple heat exchange tubes 306 is collected inside the air collection hood 304 via the air collection plate 305. An exhaust pipe 307 is fixedly connected to the end face of the air collection hood 304 away from the air preheating box 3, through which the air inside the air collection hood 304 is discharged.

[0025] Working Principle: During operation, the leather to be dried is suspended on the leather rack 101 inside the drying chamber 1, and the chamber door is closed. The intake fan 202 is activated, drawing in outside air through the intake pipe 203. This air first enters the air preheating chamber 3. Simultaneously, the exhaust fan 4 guides the hot, humid air discharged from the drying chamber 1 through the conveying pipe 401 into the air distribution hood 302, where it is evenly distributed by the air distribution plate 303 into multiple heat exchange tubes 306. During this process, the waste heat air inside the heat exchange tubes 306 exchanges heat with the fresh air outside, preheating the fresh air. The preheated air then enters the heating chamber 2 through the intake pipe 203, where it is reheated by the electric heating tube 201 before being sent into the drying chamber 1 through the rectangular air inlet 102 for efficient drying of the leather. The waste heat air that has completed heat exchange is collected through the air collection hood 304 and discharged through the exhaust pipe 307, while the humid air in the drying box 1 is continuously discharged through the air outlet 103 and the exhaust fan 4, forming a circulating heat recovery system to achieve efficient utilization of heat energy and energy-saving drying.

[0026] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. An energy saving leather drying oven comprising a drying oven (1), characterized in that: A rectangular air inlet (102) is provided in the middle of the upper end face of the drying box (1). A heating box (2) is connected to the upper end face of the drying box (1) above the rectangular air inlet (102). An air intake fan (202) is fixedly connected to the middle of the upper end of the heating box (2). An air intake pipe (203) is fixedly connected to the upper end of the air intake fan (202). An air preheating box (3) is fixedly connected to the middle of the air intake pipe (203). A gas distribution hood (302) and a gas collection hood (304) are fixedly connected to the two end faces of the air preheating box (3), respectively. An air outlet (103) is provided at the lower end of one end face of the drying box (1). An exhaust fan (4) is connected to the outside of the air outlet (103). One side of the exhaust fan (4) and one side of the gas distribution hood (302) are connected by a conveying pipe (401).

2. The energy saving leather drying cabinet according to claim 1, characterized in that: The drying box (1) is fixedly equipped with a leather hanging rack (101), and the heating box (2) is fixedly connected with multiple electric heating tubes (201).

3. The energy saving leather drying cabinet as claimed in claim 1, wherein: The air preheating box (3) has rectangular openings (301) on both sides of its end face. The inner sides of the air distribution hood (302) and the air collection hood (304) are respectively connected to the two rectangular openings (301) on both sides of the air preheating box (3).

4. The energy saving leather drying cabinet according to claim 3, characterized in that: A gas distribution plate (303) is fixedly connected between the gas distribution hood (302) and the rectangular opening (301) on one side of the air preheating box (3), and a gas collecting plate (305) is fixedly connected between the gas collecting hood (304) and the rectangular opening (301) on the other side of the air preheating box (3).

5. The energy saving leather drying cabinet according to claim 4, characterized in that: Multiple heat exchange tubes (306) are fixedly connected between the air distribution plate (303) and the air collection plate (305) and inside the air preheating box (3). One side of the multiple heat exchange tubes (306) is connected to the inside of the air distribution hood (302), and the other side of the multiple heat exchange tubes (306) is connected to the inside of the air collection hood (304).

6. The energy saving leather drying cabinet as claimed in claim 1, wherein: An exhaust pipe (307) is fixedly connected to the side of the gas collection hood (304) away from the air preheating box (3).

7. The energy saving leather drying cabinet as claimed in claim 1, wherein: The exhaust fan (4) is fixedly connected to one end face of the drying box (1).

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