A continuous mesh belt furnace quenching furnace entrance waste heat utilization device

Abstract

The utility model discloses a continuous net belt stove quenching furnace entrance waste heat utilization device, install on quenching furnace flue (3), realize the efficient utilization to the flue gas emission waste heat through the structure improvement. The device includes the first fixed ring and the second fixed ring fixed installation respectively in the both sides of flue, is connected to set up more than one heat exchange pipe between two fixed rings, and heat exchange pipe is with two fixed rings and is arranged to the flue pipe of conduction and adhesion, and can make circumferential rotation to fixed ring. When inject clean cold water to the liquid storage bag, the liquid storage bag both sides are liquid and are under the action of gravity and downward adhesion each heat exchange pipe movement, and its expansion end applies eccentric force and drives heat exchange pipe rotation, makes each pipe wall turn round and expose in high temperature area, improves the heating uniformity and promotes the heat exchange efficiency. At the same time, the liquid storage bag can cover heat exchange pipe (2) and part flue (3) when sagging, forms dynamic heat preservation layer, reduces the heat loss, realizes the efficient heating of cleaning water, has simple structure, energy -conserving effect is remarkable and the advantages such as convenient maintenance.

Description

Technical Field

[0001] This utility model relates to a waste heat utilization device, specifically a waste heat utilization device at the inlet of a continuous mesh belt furnace quenching furnace. Background Technology

[0002] In continuous mesh belt furnace quenching production lines, the quenching furnace generates a large amount of high-temperature flue gas during operation. This flue gas is usually discharged through exhaust pipes. The surface temperature of the exhaust pipes is high, and they have great potential for waste heat utilization. Therefore, in existing technologies, heat exchange tubes are often arranged on the outside of the exhaust pipes and fixed in contact with them. The water inside the heat exchange tubes is heated by heat conduction and used for preheating cleaning water or other process water.

[0003] However, existing waste heat recovery structures for flue gas pipes generally have the following characteristics and shortcomings:

[0004] The heat exchange tubes are fixedly contacted to the surface of the flue pipe by brackets or clamps. During operation, the heat exchange tubes are always in the same heated position and cannot be adjusted according to the heating situation. This results in some tube sections being overheated for a long time and some tube sections being underheated, leading to uneven heat exchange.

[0005] In many designs, the water inside the heat exchange tubes relies solely on natural convection circulation, resulting in slow flow speeds or even near-static flow in some areas. This leads to low efficiency in temperature transfer between the heat exchange surface and the water, causing the overall water to heat up slowly.

[0006] If the heat exchange tube is fixed in place, it is impossible to make the heat evenly distributed across the tube wall by rotating it. This can easily lead to a situation where one side has a higher temperature than the other, which affects the overall heat exchange performance.

[0007] Most existing heat exchange tubes are in an exposed metal state without effective insulation or covering structure. The tube wall is in direct contact with the surrounding air, and the heated side dissipates heat to the outside, resulting in large heat loss. The actual heat obtained by the water is limited, and the heat exchange efficiency is low. Utility Model Content

[0008] To address the aforementioned problems, this utility model provides a continuous mesh belt furnace quenching furnace inlet waste heat utilization device, which can effectively overcome the shortcomings of the prior art.

[0009] This utility model is achieved through the following technical solution: a continuous mesh belt furnace quenching furnace inlet waste heat utilization device, comprising:

[0010] A waste heat recovery device is installed on the exhaust pipe of the quenching furnace to absorb the heat from the exhaust pipe and heat the cleaning water inside the waste heat recovery device.

[0011] The waste heat utilization device includes a first fixing ring and a second fixing ring, which are respectively fixedly installed on both sides of the flue pipe;

[0012] One or more heat exchange tubes are connected and disposed between the first fixed ring and the second fixed ring. One or more heat exchange tubes are respectively connected to the first fixed ring and the second fixed ring. Each heat exchange tube can rotate circumferentially relative to the first fixed ring and the second fixed ring. One or more heat exchange tubes are all attached to the flue pipe.

[0013] A liquid storage bladder is located at the top of one or more heat exchange tubes. The liquid storage bladder is equipped with an inlet pipe and a guide pipe. The liquid storage bladder is connected to the first fixing ring through the guide pipe. When cold water for cleaning is injected into the liquid storage bladder, liquid enters from both sides of the liquid storage bladder and moves downward along with each heat exchange tube. The expansion end of the liquid storage bladder drives each heat exchange tube to rotate circumferentially.

[0014] As a preferred technical solution, the first fixing ring and the second fixing ring are composed of a first ring body and a second ring body, and the top of the first ring body and the second ring body are hinged by a rotating shaft, and the middle position of the liquid storage bladder is fixedly connected to the rotating shaft.

[0015] Both the first ring portion and the second ring portion can be opened and closed circumferentially via the rotating shaft.

[0016] As a preferred technical solution, the first ring body and the second ring body are provided with locking ears on the side away from the rotating shaft, and locking bolts and locking nuts are provided through the locking ears.

[0017] As a preferred technical solution, the opposing surfaces of the first fixing ring and the second fixing ring are provided with mating holes, and a sealing connector is provided on both sides of each heat exchange tube. The sealing connector is rotatably inserted into the mating hole, and multiple O-rings are provided on the outside of the sealing connector.

[0018] As a preferred technical solution, the output end of the second fixing ring is provided with one or more spray pipes, and the spray pipes are equipped with a pressure pump for spraying.

[0019] As a preferred technical solution, the liquid storage bladder is n-shaped and made of elastic rubber material. The liquid storage bladder has a liquid storage cavity inside, and the cleaning water enters the liquid storage bladder through the liquid inlet pipe.

[0020] As a preferred technical solution, each heat exchange tube is made of metal material, which contacts the exhaust pipe and absorbs the heat on the exhaust pipe.

[0021] As a preferred technical solution, the outer circular surface of the heat exchange tube is provided with anti-slip texture.

[0022] The beneficial effects of this utility model are: the liquid storage bladder hangs down and drives each heat exchange tube to rotate around the exhaust pipe by the weight of the liquid storage bladder after it is filled with liquid. This allows different parts of the heat exchange tube surface to be exposed to high temperature areas in turn during operation, avoiding local overheating or insufficient heating caused by being fixed, thereby achieving uniform heating of the heat exchange tube as a whole and significantly improving heat exchange efficiency.

[0023] The liquid storage bladder of this invention can cover each heat exchange tube during the downward covering process, and cover the surface of the exhaust pipe in a local area to form a flexible heat insulation layer, which effectively reduces the loss of heat to the outside during the heat exchange process, accelerates the temperature rise of the heated water, and further improves the waste heat utilization rate.

[0024] The liquid reservoir drives the heat exchange tube to rotate without the need for an additional power mechanism. The circumferential rotation of the heat exchange tube can be completed solely by the gravity generated by the liquid inlet. The structure is simple, the operation is reliable, and the maintenance cost is low. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the overall structure of the present invention. Figure 1 ;

[0027] Figure 2 This is a schematic diagram of the overall structure of the present invention. Figure 2 ;

[0028] Figure 3 This is a cross-sectional schematic diagram of the present invention;

[0029] Figure 4 This is a schematic diagram of the structure of the present invention with the reservoir removed;

[0030] Explanation of reference numerals in the attached figures:

[0031] 1. First fixing ring; 6. Second fixing ring; 2. Heat exchange tube; 7. Liquid storage bladder; 8. Liquid inlet pipe; 9. Liquid guide pipe; 5. Rotating shaft; 10. Locking lug; 11. Locking bolt; 4. Spray pipe; 3. Smoke exhaust pipe. Detailed Implementation

[0032] All features disclosed in this specification, or steps in all methods or processes disclosed herein, may be combined in any way, except for mutually exclusive features and / or steps.

[0033] Any feature disclosed in this specification (including any appended claims, abstract, and drawings) may be replaced by other equivalent or similar features, unless specifically stated otherwise. That is, unless specifically stated otherwise, each feature is merely one example of a series of equivalent or similar features.

[0034] like Figures 1-4 As shown, this utility model discloses a continuous mesh belt furnace quenching furnace inlet waste heat utilization device. In this embodiment, the continuous mesh belt furnace quenching furnace inlet waste heat utilization device is installed at the position of the flue pipe 3 of the quenching furnace. Through structural innovation and water circuit arrangement, the waste heat of the flue pipe 3 is efficiently utilized to heat the cleaning water required for cleaning the workpiece, thereby improving energy utilization and reducing auxiliary heating energy consumption.

[0035] Specifically, the device includes a waste heat utilization device installed on the exhaust pipe 3. This waste heat utilization device is used to absorb the heat released by the exhaust pipe 3 and transfer it to the internally flowing cleaning water, so that the cleaning water is significantly heated before entering the spray system.

[0036] The main structure of the waste heat utilization device consists of a first fixing ring 1 and a second fixing ring 6. These two fixing rings are respectively fitted and fixed on both sides of the flue pipe 3 to form a stable support frame for installing and supporting the heat exchange tube 2 assembly in the middle.

[0037] One or more heat exchange tubes 2 are arranged between two fixed rings. The two ends of each heat exchange tube 2 are connected to the flow channels on the first fixed ring 1 and the second fixed ring 6, respectively, so that the interior of the heat exchange tube 2 can be connected to the cleaning water circulation system. The axial position of each heat exchange tube 2 is in contact with the surface of the flue pipe 3 to ensure that heat can be quickly transferred to the water inside the tube through heat conduction.

[0038] Unlike traditional fixed types, in this embodiment, the heat exchange tube 2 is installed on the first fixed ring 1 and the second fixed ring 6 through a sealed docking structure, and can rotate in a circumferential direction relative to these two fixed rings, so that different tube wall positions can be exposed to high temperature areas in turn, thereby avoiding uneven heating and improving the overall heat exchange efficiency.

[0039] A liquid reservoir 7 is installed at the top of the heat exchange tube 2 assembly. The liquid reservoir 7 has an n-shaped structure, is made of elastic rubber material, and has a closed liquid storage chamber inside. An inlet pipe 8 is located at the top of the liquid reservoir 7, allowing external clean cold water to be injected into the liquid storage chamber. A guide pipe 9 is located at the bottom of the liquid storage chamber, connecting to the flow channel of the first fixing ring 1, allowing the water inside the liquid reservoir 7 to communicate with the cleaning water system inside the heat exchange tube 2. When an external water pump injects cold water into the liquid reservoir 7, the liquid on both sides of the liquid reservoir 7 gradually fills and naturally droops due to its own weight, adhering to the top and side surfaces of the heat exchange tube 2. During the drooping process, the expansion end of the liquid reservoir 7 applies eccentric gravity, causing each heat exchange tube 2 to rotate around its circumference.

[0040] As the heat exchange tube 2 rotates, the heated areas on its surface change continuously, ensuring that each tube wall is heated evenly during operation. This avoids excessive temperature gradients or scaling and ash buildup caused by prolonged fixed contact with a high-temperature area. Simultaneously, when the liquid storage bladder 7 droops, it partially covers the outer surface of the heat exchange tube 2 and part of the exhaust pipe 3, forming a dynamic insulation layer that reduces heat loss to the outside and makes the heat exchange process more efficient.

[0041] The specific structure of the first fixed ring 1 and the second fixed ring 6 consists of two ring body parts, namely the first ring body part and the second ring body part. The two are hinged at the top by a rotating shaft 5, and can perform circumferential opening and closing movements with the rotating shaft 5 as the fulcrum.

[0042] When the liquid storage bladder 7 is installed, its middle position is fixedly connected to the rotating shaft 5 to ensure that the liquid storage bladder 7 can maintain synchronous movement with the heat exchange tube 2 during water filling and descent.

[0043] When it is necessary to disassemble or maintain the heat exchange tube 2, simply open the two ring sections by rotating the shaft 5 to easily remove or install the heat exchange tube 2, greatly improving the convenience of maintenance. In order to ensure the stable closure of the ring sections in the assembled state, the first ring section and the second ring section are provided with locking lugs 10 on the side away from the rotating shaft 5. The locking lugs 10 are fixed together by locking bolts 11 and locking nuts, so that the entire fixed ring forms a strong closed structure.

[0044] To achieve a sealed connection between the heat exchange tube 2 and the fixed ring, mating holes are machined on the opposing surfaces of the first fixed ring 1 and the second fixed ring 6. Each heat exchange tube 2 has a sealing connector at both ends, which is rotatably inserted into the corresponding mating hole. Multiple O-rings form a multi-layered seal to prevent water leakage during rotation and ensure smooth rotation of the heat exchange tube 2. At the output end of the second fixed ring 6, one or more spray pipes 4 are connected. These spray pipes 4 are connected to the cleaning system, and a pressure pump is installed on their pipelines. The pressure pump sprays heated cleaning water through nozzles onto the surface of the workpiece to be cleaned, achieving a high-temperature, high-pressure cleaning effect.

[0045] In this embodiment, each heat exchange tube 2 is preferably made of a metal material with excellent thermal conductivity, and its outer surface is machined with anti-slip texture to enhance the friction with the liquid storage bladder 7, ensuring that the heat exchange tube 2 can effectively rotate when the liquid storage bladder 7 expands and droops. The heat exchange tube 2 is fully in contact with the surface of the flue pipe 3, so that the heat from the flue pipe 3 can be quickly transferred to the water flowing inside the heat exchange tube 2 through contact heat conduction, and then reused for cleaning operations through the spray system. This structure not only achieves uniform heating of the heat exchange tube 2 during operation, but also reduces heat loss through the covering effect of the liquid storage bladder 7, thereby significantly improving the utilization efficiency of flue gas waste heat and reducing the additional energy consumption required for heating the cleaning water.

[0046] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any changes or substitutions conceived without inventive effort should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the scope defined in the claims.

Claims

1. A device for utilizing waste heat at the inlet of a continuous mesh belt furnace quenching furnace, characterized in that, include: Waste heat utilization device is installed on the exhaust pipe (3) of the quenching furnace to absorb the heat of the exhaust pipe (3) and heat the cleaning water in the waste heat utilization device; The waste heat utilization device includes a first fixing ring (1) and a second fixing ring (6), which are respectively fixedly installed on both sides of the flue pipe (3); One or more heat exchange tubes (2) are connected and disposed between the first fixed ring (1) and the second fixed ring (6). One or more heat exchange tubes (2) are respectively connected to the first fixed ring (1) and the second fixed ring (6). Each heat exchange tube (2) can rotate circumferentially relative to the first fixed ring (1) and the second fixed ring (6). One or more heat exchange tubes (2) are all attached to the flue pipe (3). A liquid storage bladder (7) is located at the top of one or more heat exchange tubes (2). The liquid storage bladder (7) is provided with an inlet pipe (8) and a guide pipe (9). The liquid storage bladder (7) is connected to the first fixing ring (1) through the guide pipe (9). When cold water for cleaning is injected into the liquid storage bladder (7), liquid enters from both sides of the liquid storage bladder (7) and moves downward along with each heat exchange tube (2). The expansion end of the liquid storage bladder (7) drives each heat exchange tube (2) to rotate circumferentially.

2. The continuous mesh belt furnace quenching furnace inlet waste heat utilization device according to claim 1, characterized in that: The first fixing ring (1) and the second fixing ring (6) are composed of a first ring body and a second ring body, and the top of the first ring body and the second ring body are hinged by a rotating shaft (5). The middle position of the liquid storage bladder (7) is fixedly connected to the rotating shaft (5). Both the first ring portion and the second ring portion can be opened and closed circumferentially via the rotating shaft (5).

3. The waste heat utilization device at the inlet of the continuous mesh belt furnace quenching furnace according to claim 2, characterized in that: The first ring body and the second ring body are provided with locking lugs (10) on the side away from the rotating shaft (5), and locking bolts (11) and locking nuts are provided through the locking lugs (10).

4. The continuous mesh belt furnace quenching furnace inlet waste heat utilization device according to claim 2, characterized in that: The first fixing ring (1) and the second fixing ring (6) are provided with mating holes on their opposite sides. Each heat exchange tube (2) is provided with a sealing joint on both sides. The sealing joint is rotated and installed into the mating hole. Multiple O-rings are provided on the outside of the sealing joint.

5. The continuous mesh belt furnace quenching furnace inlet waste heat utilization device according to claim 1, characterized in that: The output end of the second fixing ring (6) is provided with one or more spray pipes (4), and the spray pipes (4) are provided with a pressure pump for spraying.

6. The continuous mesh belt furnace quenching furnace inlet waste heat utilization device according to claim 1, characterized in that: The reservoir (7) is n-shaped and made of elastic rubber material. The reservoir (7) has a reservoir cavity inside. Cleaning water enters the reservoir (7) through the inlet pipe (8).

7. The continuous mesh belt furnace quenching furnace inlet waste heat utilization device according to claim 1, characterized in that: Each heat exchange tube (2) is made of metal material, and it contacts the exhaust pipe (3) and absorbs the heat on the exhaust pipe (3).

8. The waste heat utilization device at the inlet of the continuous mesh belt furnace quenching furnace according to claim 7, characterized in that: The outer surface of the heat exchange tube (2) is provided with anti-slip texture.

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