Hot air multi-stage preheating recovery device

Abstract

The utility model relates to the technical field of energy recovery, in particular to a hot air multistage preheating recovery device. The utility model provides a multi-stage hot air preheating and recycling device which can perform multi-stage absorption on hot air preheating, improve the recycling efficiency of hot air preheating, enable preheating to be fully recycled and avoid energy waste. A hot air multistage preheating recovery device comprises a connecting pipe, an air inlet pipe, an air outlet pipe and the like, the upper side of the right portion of the connecting pipe is connected with the air inlet pipe, and the upper side of the left portion of the connecting pipe is connected with the air outlet pipe. According to the hot air preheating device, hot air preheating gas makes full contact with the connecting coil pipe in the connecting pipe, water in the connecting coil pipe fully absorbs heat in the preheating gas layer by layer, and the effects that multi-stage absorption can be conducted on hot air preheating, the recovery efficiency of hot air preheating is improved, preheating is fully recovered, and energy waste is avoided are achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of energy recovery, in particular to a multi-stage hot air preheating recovery device. Background Art

[0002] In modern industrial production, energy consumption and energy conservation and emission reduction have become important issues for the sustainable development of enterprises. Especially in high-temperature process industries such as metallurgy, chemical engineering, and textiles, a large amount of thermal energy is dissipated into the environment in the form of waste gas and waste heat, which not only causes huge waste of energy but also exacerbates environmental pollution.

[0003] In the existing hot air preheating recovery device, usually, the gas with preheating is passed through one side of the heat exchanger, while the medium to be heated flows through the other side, and the two transfer heat through the wall of the heat exchanger to achieve the preheating recovery effect. However, the existing preheating recovery device often has a single-stage structure, with low heat recovery efficiency, resulting in insufficient preheating recovery and causing energy waste.

[0004] Therefore, a multi-stage hot air preheating recovery device is now developed, which can absorb hot air preheating in multiple stages, improve the recovery efficiency of hot air preheating, and enable sufficient preheating recovery to avoid energy waste. Summary of the Utility Model

[0005] In order to overcome the shortcomings that the existing hot air preheating recovery device often has a single-stage structure, with low heat recovery efficiency, resulting in insufficient preheating recovery and causing energy waste, the utility model provides a multi-stage hot air preheating recovery device that can absorb hot air preheating in multiple stages, improve the recovery efficiency of hot air preheating, and enable sufficient preheating recovery to avoid energy waste.

[0006] A multi-stage hot air preheating recovery device includes a connecting pipe, an air inlet pipe, an air outlet pipe, and a heat exchange assembly. The upper side of the right part of the connecting pipe is connected with the air inlet pipe, the upper side of the left part of the connecting pipe is connected with the air outlet pipe, and the connecting pipe is provided with a heat exchange assembly capable of performing heat exchange on the preheated gas.

[0007] Furthermore, flange plates are provided on both the air inlet pipe and the air outlet pipe, facilitating docking with the hot air exhaust pipeline.

[0008] Furthermore, it also includes a U-shaped pipe and a valve. The lower part of the connecting pipe is connected with the U-shaped pipe, and the U-shaped pipe is rotatably connected with the valve.

[0009] Furthermore, the heat exchange assembly includes a liquid inlet pipe, a connecting coil pipe, and a drain pipe. The front and rear parts of the connecting pipe are both connected with the liquid inlet pipe, the left and right parts of the connecting pipe are both connected with the connecting coil pipe, the connecting coil pipes are all connected with the adjacent liquid inlet pipes, the left and right sides of the connecting pipe are both connected with the drain pipes, and the drain pipes are all connected with the adjacent connecting coil pipes.

[0010] Furthermore, there are multiple layers of blocking tubes inside the connecting tube. Multiple exhaust holes are opened on the blocking tubes, and the aperture diameters of the exhaust holes gradually decrease from the outside to the inside, so that the preheated gas is buffered in the connecting tube, the heat exchange time of the liquid-heated gas in the connecting tube is prolonged, and the heat in the preheated gas is fully absorbed.

[0011] Furthermore, the connecting coiled tube is spirally distributed along the multiple layers of blocking tubes inside the connecting tube, increasing the contact area with the preheated gas and improving the heat exchange efficiency of the preheated gas.

[0012] The beneficial effects of the present utility model are as follows: By enabling the hot air preheated gas to fully contact the connecting coiled tube inside the connecting tube, the water in the connecting coiled tube fully absorbs the heat in the preheated gas layer by layer, achieving the effect of being able to perform multi-stage absorption of hot air preheating, improving the recovery efficiency of hot air preheating, and enabling the preheating to be fully recovered to avoid energy waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a three-dimensional structural schematic diagram of the present utility model.

[0014] Figure 2 is a structural schematic diagram of the present utility model.

[0015] Figure 3 is a first partial three-dimensional structural sectional view of the present utility model.

[0016] Figure 4 is a second partial three-dimensional structural sectional view of the present utility model.

[0017] Figure 5 is a third partial three-dimensional structural schematic diagram of the present utility model.

[0018] In the above drawings: 1: connecting tube, 2: intake pipe, 3: outlet pipe, 4: U-shaped tube, 5: valve, 6: liquid inlet pipe, 7: connecting coiled tube, 8: drain pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The present utility model will now be described more fully hereinafter with reference to the accompanying drawings, in which the currently preferred embodiments of the present utility model are shown. However, the present utility model can be implemented in many different forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided for thoroughness and completeness and fully convey the scope of the present utility model to those skilled in the art.

[0020] A hot air multi-stage preheating recovery device, as Figures 1 - 5As shown in the figure, it includes a connecting pipe 1, an intake pipe 2, an exhaust pipe 3, a U-shaped pipe 4, a valve 5 and a heat exchange component. The upper side of the right part of the connecting pipe 1 is connected to the intake pipe 2, and the upper side of the left part of the connecting pipe 1 is connected to the exhaust pipe 3. Flange plates are provided on both the intake pipe 2 and the exhaust pipe 3, which is convenient for docking with the hot air exhaust pipe. The lower part of the connecting pipe 1 is connected to the U-shaped pipe 4, and the valve 5 is rotatably connected to the U-shaped pipe 4. A heat exchange component is provided on the connecting pipe 1.

[0021] As Figure 3 and Figure 5 shown, the heat exchange component includes a liquid inlet pipe 6, a connecting coil 7 and a drain pipe 8. The front and rear parts of the connecting pipe 1 are both connected to the liquid inlet pipe 6, the left and right parts of the connecting pipe 1 are both connected to the connecting coil 7, and the connecting coils 7 are all connected to the adjacent liquid inlet pipes 6. Drain pipes 8 are connected to both the left and right sides of the connecting pipe 1, and the drain pipes 8 are all connected to the adjacent connecting coils 7. There are three layers of blocking pipes in the connecting pipe 1, and a plurality of exhaust holes are opened on the blocking pipes. The aperture of the exhaust holes gradually decreases from the outside to the inside, so that the preheated gas buffers in the connecting pipe 1, prolongs the heat exchange time of the liquid heat gas in the connecting pipe 1, and enables the heat in the preheated gas to be fully absorbed. The connecting coils 7 are spirally distributed along the multi-layer blocking pipes in the connecting pipe 1, increasing the contact area with the preheated gas and improving the heat exchange efficiency of the preheated gas.

[0022] When using the present utility model, first place the connecting pipe 1 in the preheating recovery area, and then dock the intake pipe 2 and the exhaust pipe 3 to the recovery pipe of the preheated gas, so that the preheated gas is docked to the intake pipe 2, and the preheated gas to be recovered enters the connecting pipe 1 from the intake pipe 2. At the same time, dock the liquid inlet pipe 6 and the drain pipe 8 to the water inlet pipe, so that water flows into the connecting plate from the liquid inlet pipe 6 and then flows out from the drain pipe 8. When the preheated gas enters the connecting pipe 1, after passing through the air outlet holes on the outer layer blocking pipe in the connecting pipe 1, it penetrates layer by layer to the innermost layer, and then flows from right to left in the innermost layer. After passing through the layer-by-layer penetration from the inside to the outside again, it is discharged from the exhaust pipe 3. Because the air outlet holes on the outer layer blocking pipe are larger than those on the inner layer, the residence time of the preheated gas in the connecting pipe 1 is prolonged, so that the preheated gas is in full contact with the connecting coil 7 in the connecting pipe 1, and the water in the connecting coil 7 fully absorbs the heat in the preheated gas layer by layer. The moisture in the preheated gas after the heat is absorbed will condense in the connecting pipe 1, and the condensed water will flow out layer by layer from the exhaust holes on the blocking pipe to the lower U-shaped pipe 4. Then open the valve 5 on the U-shaped pipe 4 to discharge the condensed water in the connecting pipe 1, thereby playing the role of being able to absorb the hot air preheating in multiple stages, improving the recovery efficiency of the hot air preheating, and enabling the preheating to be fully recovered to avoid energy waste.

[0023] Although the present utility model has been described with reference to exemplary embodiments, it should be understood that the present utility model is not limited to the disclosed exemplary embodiments. The scope of the following claims should be given the broadest interpretation so as to cover all modifications and equivalent structures and functions.

Claims

1. A hot air multi-stage preheating and recovery device, characterized in that: It includes a connecting pipe (1), an air inlet pipe (2), an air outlet pipe (3) and a heat exchange component. The upper side of the right part of the connecting pipe (1) is connected to the air inlet pipe (2), the upper side of the left part of the connecting pipe (1) is connected to the air outlet pipe (3), and a heat exchange component capable of heat-exchanging the preheated gas is provided on the connecting pipe (1).

2. The hot air multi-stage preheating and recovery device according to claim 1, wherein: Flange plates are provided on both the air inlet pipe (2) and the air outlet pipe (3) to facilitate docking with the hot air exhaust pipe.

3. The hot air multi-stage preheating and recovery device according to claim 1, characterized in that: It further includes a U-shaped pipe (4) and a valve (5). The lower part of the connecting pipe (1) is connected to the U-shaped pipe (4), and the valve (5) is rotatably connected to the U-shaped pipe (4).

4. A hot air multi-stage preheating and recovery device according to claim 3, characterized in that: The heat exchange component includes a liquid inlet pipe (6), a connecting coil pipe (7) and a drain pipe (8). The front and rear parts of the connecting pipe (1) are both connected to the liquid inlet pipe (6), the left and right parts of the connecting pipe (1) are both connected to the connecting coil pipe (7), the connecting coil pipes (7) are all connected to the adjacent liquid inlet pipes (6), the left and right sides of the connecting pipe (1) are both connected to the drain pipes (8), and the drain pipes (8) are all connected to the adjacent connecting coil pipes (7).

5. The hot air multi-stage preheating and recovery device according to claim 4, characterized in that: Multiple layers of blocking pipes are provided in the connecting pipe (1), and a plurality of exhaust holes are opened on the blocking pipes. The aperture diameters of the exhaust holes gradually decrease from the outside to the inside, so that the preheated gas is buffered in the connecting pipe (1), the heat exchange time of the liquid heat gas in the connecting pipe (1) is prolonged, and the heat in the preheated gas is fully absorbed.

6. The hot air multi-stage preheating and recovery device according to claim 5, characterized in that: The connecting coil pipes (7) are spirally distributed in the connecting pipe (1) along the multiple layers of blocking pipes, increasing the contact area with the preheated gas and improving the heat exchange efficiency of the preheated gas.

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