Quenching furnace inlet waste heat utilization device of continuous mesh belt furnace

Abstract

The invention discloses a quenching furnace inlet waste heat utilization device of a continuous mesh belt furnace, which is mounted on a quenching furnace smoke discharge pipe (3) and realizes efficient utilization of smoke discharge waste heat through structural improvement. The device comprises a first fixing ring and a second fixing ring which are fixedly installed on the two sides of the smoke exhaust pipe respectively, one or more heat exchange pipes are connected between the two fixing rings, and the heat exchange pipes are communicated with the two fixing rings, attached to the smoke exhaust pipe and capable of circumferentially rotating relative to the fixing rings. When cold water for cleaning is injected into the liquid storage bag, liquid enters the two sides of the liquid storage bag at the same time, the liquid storage bag is downwards attached to the heat exchange pipes to move under the gravity effect, the expansion ends of the liquid storage bag apply eccentric force to drive the heat exchange pipes to rotate, the pipe walls are exposed to a high-temperature area in turn, heating uniformity is improved, and heat exchange efficiency is improved. Meanwhile, when drooping, the liquid storage bag can wrap the heat exchange pipe (2) and part of the smoke exhaust pipe (3), a dynamic heat preservation layer is formed, heat loss is reduced, efficient heating of cleaning water is achieved, and the device has the advantages of being simple in structure, remarkable in energy-saving effect, convenient to maintain and the like.

Description

TECHNICAL FIELD

[0001] The present application relates to a waste heat utilization device, in particular to a continuous mesh belt furnace quenching furnace inlet waste heat utilization device. BACKGROUND

[0002] In the continuous mesh belt furnace quenching production line, a large amount of high-temperature flue gas will be generated during the operation of the quenching furnace, which is usually discharged through the exhaust pipe. The surface of the exhaust pipe is relatively high in temperature and has great potential for waste heat utilization. Therefore, in the prior art, heat exchange pipes are arranged outside the exhaust pipe to be fixedly contacted with the exhaust pipe, and the water inside the heat exchange pipes is heated by conduction for preheating of cleaning water or other process water.

[0003] However, the existing exhaust pipe waste heat utilization structure generally has the following characteristics and deficiencies:

[0004] The heat exchange pipes are fixedly contacted with the surface of the exhaust pipe through supports or clamps, and the heat exchange pipes are always in the same heated position during operation, which cannot be adjusted according to the heating condition, resulting in that some pipe sections are long-term overheated and some pipe sections are insufficiently heated, and the heat exchange is uneven.

[0005] In many designs, the water in the heat exchange pipes only relies on natural convection circulation, and the flow speed is slow or even locally almost stationary, the temperature difference transmission efficiency between the heat exchange surface and the water is low, and the overall water heating speed is slow.

[0006] The heat exchange pipes are fixedly immobile, and the heat exchange pipes cannot be uniformly heated by rotating or the like, and the phenomenon that one side is relatively high in temperature and the other side is relatively low in temperature is prone to occur, which affects the overall heat exchange performance.

[0007] The existing heat exchange pipes are in a bare metal state without effective insulation or covering structure, and the pipe wall is directly contacted with the surrounding air, the heat loss of the heated side to the outside is serious, the actual heat obtained by the water is limited, and the heat exchange efficiency is low. SUMMARY

[0008] In order to solve the above problems, the present application provides a continuous mesh belt furnace quenching furnace inlet waste heat utilization device, which can effectively solve the deficiencies in the prior art.

[0009] The present application is realized by the following technical scheme: a continuous mesh belt furnace quenching furnace inlet waste heat utilization device, comprising:

[0010] The waste heat utilization device is installed on the exhaust pipe of the quenching furnace, and is used for absorbing the heat of the exhaust pipe and heating cleaning water in the waste heat utilization device;

[0011] The waste heat utilization device comprises a first fixed ring and a second fixed ring, and the first fixed ring and the second fixed ring are fixedly installed on the two sides of the smoke exhaust pipe respectively.

[0012] One or more heat exchange pipes are connected and arranged between the first fixed ring and the second fixed ring, and the one or more heat exchange pipes are in conduction with the first fixed ring and the second fixed ring respectively.

[0013] A liquid storage bag is arranged at the top of the one or more heat exchange pipes, and the liquid storage bag is provided with a liquid inlet pipe and a liquid guide pipe.

[0014] As a preferred technical solution, the first fixed ring and the second fixed ring have a first ring body part and a second ring body part, and the top of the first ring body part and the second ring body part is hinged through a rotating shaft, and the middle position of the liquid storage bag is fixedly connected with the rotating shaft.

[0015] The first ring body part and the second ring body part can be opened and closed in the circumferential direction through the rotating shaft.

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

[0017] As a preferred technical solution, the opposite surfaces of the first fixed ring and the second fixed ring are provided with abutting holes, and each heat exchange pipe is provided with a sealing abutting head on the two sides.

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

[0019] As a preferred technical solution, the liquid storage bag is in the shape of n and is made of elastic rubber material, and the liquid storage bag is provided with a liquid storage cavity inside, and the cleaning water enters the liquid storage bag through the liquid inlet pipe.

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

[0021] As a preferred technical solution, the outer circumferential surface of the heat exchange pipe is provided with anti-skid texture.

[0022] The application has the advantages that: the liquid storage bag is lowered and drives the heat exchange pipes to rotate around the smoke exhaust pipe by the self-weight effect after the liquid storage bag is filled with liquid, so that different parts of the heat exchange pipe surface can be exposed to the high-temperature area in turn during operation, avoiding local overheating or insufficient heating caused by fixation, so that the heat exchange pipe is evenly heated, and the heat exchange efficiency is significantly improved.

[0023] The liquid storage bag can cover the heat exchange pipes and the surface of the smoke exhaust pipe in the lowering and covering process, form a flexible heat preservation layer, effectively reduce the heat loss to the outside during heat exchange, accelerate the temperature rise speed of the heated water, and further improve the waste heat utilization rate.

[0024] The way in which the liquid storage bag drives the heat exchange pipes to rotate does not require an additional power mechanism, but only relies on the gravity generated by the liquid to complete the circumferential rotation of the heat exchange pipes, so that the structure is simple, the operation is reliable, and the maintenance cost is low. BRIEF DESCRIPTION OF DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0026] Figure 1 The overall structure of the present application Figure One ;

[0027] Figure 2 The overall structure of the present application Figure Two ;

[0028] Figure 3 The cross-sectional view of the present application

[0029] Figure 4 The structure diagram of the present application without liquid storage bag

[0030] Explanation of reference signs:

[0031] 1, first fixed ring; 6, second fixed ring; 2, heat exchange pipe; 7, liquid storage bag; 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 DESCRIPTION

[0032] All features disclosed in this specification, or all steps in the disclosed methods or processes, except mutually exclusive features and / or steps, can be combined in any manner.

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

[0034] like Figures 1-4 As shown, the present invention provides a waste heat utilization device for a continuous mesh belt furnace quenching furnace inlet. In this embodiment, the waste heat utilization device for a continuous mesh belt furnace quenching furnace inlet is installed at the exhaust pipe 3 of the quenching furnace. Through structural innovation and waterway layout, the waste heat of the exhaust pipe 3 is efficiently utilized to heat the cleaning water required for cleaning workpieces, thereby improving energy utilization and reducing auxiliary heating energy consumption.

[0035] Specifically, the device as a whole includes a set of waste heat utilization devices installed on the exhaust pipe 3, which are used to absorb the heat released by the exhaust pipe 3 and transfer it to the cleaning water flowing inside, 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. The two fixing rings are respectively mounted and fixed on both sides of the exhaust pipe 3 to form a stable support frame for installing and supporting the middle heat exchange tube 2 assembly.

[0037] One or more heat exchange tubes 2 are arranged between the two retaining rings. Each heat exchange tube 2's ends connect to the flow channels on the first and second retaining rings 1 and 6, respectively, allowing the interior of the heat exchange tube 2 to be connected to the wash water circulation system. The axial position of each heat exchange tube 2 aligns with the surface of the exhaust pipe 3, ensuring rapid heat transfer to the water within the tube through thermal conductivity.

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

[0039] A liquid storage bag 7 is installed at the top of the heat exchange pipe 2 assembly. The liquid storage bag 7 is in the shape of an n and is made of elastic rubber material. An internal storage cavity is provided in the liquid storage bag 7. The liquid storage bag 7 is provided with an inlet pipe 8 at the top, which can inject external clean cold water into the storage cavity. The bottom of the storage cavity is provided with a liquid guide pipe 9, which is connected to the flow channel of the first fixed ring 1. The water in the liquid storage bag 7 can communicate with the cleaning water system in the heat exchange pipe 2. When the external water pump injects cold water into the liquid storage bag 7, the liquid on both sides of the liquid storage bag 7 gradually fills and naturally drops due to gravity, adhering to the upper and side surfaces of the heat exchange pipe 2. During the dropping process, the expansion end of the liquid storage bag 7 applies eccentric gravity to drive the heat exchange pipes 2 to rotate around the circumferential direction.

[0040] As the heat exchange pipe 2 rotates, the heated parts of its surface change continuously, so that each pipe wall can be uniformly heated during operation, avoiding excessive temperature gradient or fouling and dust accumulation caused by long-term fixed contact with a high-temperature area. At the same time, the liquid storage bag 7 partially covers the outer surface of the heat exchange pipe 2 and part of the smoke pipe 3 when it drops, forming a dynamic insulation layer, reducing heat loss to the outside, and making the heat exchange process more efficient.

[0041] The specific structure of the first fixed ring 1 and the second fixed ring 6 is composed of two ring body parts, i.e., the first ring body part and the second ring body part. The two ring body parts are hingedly connected at the top by a rotating shaft 5, which can be used as a fulcrum to open and close in the circumferential direction.

[0042] When the liquid storage bag 7 is installed, the middle position is fixedly connected to the rotating shaft 5, ensuring that the liquid storage bag 7 can move synchronously with the heat exchange pipe 2 during water injection and dropping.

[0043] When the heat exchange pipe 2 needs to be disassembled or maintained, the two ring body parts can be opened by rotating the rotating shaft 5, so that the heat exchange pipe 2 can be easily removed or installed, greatly improving the convenience of maintenance. In order to ensure the stable closure of the ring body part in the assembled state, the first ring body part and the second ring body part are provided with locking ears 10 on the side away from the rotating shaft 5. The locking ears 10 are fixed by penetrating locking bolts 11 and cooperating with locking nuts, so that the entire fixed ring forms a firm closed structure.

[0044] In order to realize the sealing connection between the heat exchange pipe 2 and the fixed ring, the opposite surface of the first fixed ring 1 and the second fixed ring 6 is processed with a butt joint hole, the two ends of each heat exchange pipe 2 are provided with a sealing butt joint, the sealing butt joint is rotatably installed in the corresponding butt joint hole, and multiple seals are formed through multiple O-shaped sealing rings outside, so as to prevent water leakage during rotation and ensure the smoothness of the heat exchange pipe 2 during rotation. At the output end of the second fixed ring 6, one or more spray pipes 4 are connected, the spray pipe 4 is connected with the cleaning system, and a pressure pump is installed on the pipeline of the spray pipe 4, the pressure pump is used to spray the heated cleaning water to the surface of the workpiece to be cleaned through the nozzle, so as to realize the high-temperature and high-pressure spray washing effect.

[0045] In the embodiment, each heat exchange pipe 2 is preferably made of a metal material with excellent heat conduction performance, and the outer circular surface is processed with anti-skid texture to enhance the friction with the liquid storage bag 7 and ensure that the heat exchange pipe 2 can be effectively driven to rotate when the liquid storage bag 7 expands and sags. The heat exchange pipe 2 is fully attached to the surface of the smoke exhaust pipe 3, so that the heat from the smoke exhaust pipe 3 can be quickly transmitted to the water flowing in the heat exchange pipe 2 through contact heat conduction, and then returned to the cleaning operation through the spray system. The structure not only realizes uniform heating of the heat exchange pipe 2 during operation, but also reduces heat loss through the cladding effect of the liquid storage bag 7, thereby significantly improving the utilization efficiency of the exhaust heat and reducing the additional energy consumption required for heating the cleaning water.

[0046] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any change or replacement without creative labor should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be limited by the protection scope defined in the claims.

Claims

1. A continuous mesh belt furnace quenching furnace inlet waste heat utilization device, characterized in that, The utility model relates to a quenching and tempering furnace exhaust heat utilization device, and it comprises the following parts: A waste heat utilization device is installed on the exhaust pipe (3) of the quenching and tempering 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 comprises a first fixed ring (1) and a second fixed ring (6), and the first fixed ring (1) and the second fixed ring (6) are fixedly installed on the two sides of the exhaust pipe (3), respectively. One or more heat exchange pipes (2) are connected between the first fixed ring (1) and the second fixed ring (6), and each heat exchange pipe (2) is in communication with the first fixed ring (1) and the second fixed ring (6), respectively. Each heat exchange pipe (2) can rotate circumferentially relative to the first fixed ring (1) and the second fixed ring (6), and each heat exchange pipe (2) is arranged in close contact with the exhaust pipe (3).

2. The apparatus according to claim 1, characterized in that: A liquid storage bag (7) is arranged at the top of each heat exchange pipe (2), and the liquid storage bag (7) is provided with an inlet pipe (8) and a liquid guide pipe (9). When the liquid storage bag (7) is filled with cold water for cleaning, the liquid storage bag (7) moves downward on both sides in close contact with each heat exchange pipe (2), and each heat exchange pipe (2) rotates circumferentially driven by the expansion end of the liquid storage bag (7).

3. The apparatus according to claim 2, characterized in that: The first ring body and the second ring body are hinged at the top by a rotating shaft (5), and the middle position of the liquid storage bag (7) is fixedly connected with the rotating shaft (5).

4. The apparatus according to claim 2, wherein: The first ring body and the second ring body can be opened and closed circumferentially by the rotating shaft (5).

5. The apparatus according to claim 1, characterized in that: The first ring body and the second ring body are provided with locking ears (10) on the side away from the rotating shaft (5), and locking bolts (11) and locking nuts are arranged through the locking ears (10).

6. The apparatus according to claim 1, wherein: The opposite surfaces of the first fixed ring (1) and the second fixed ring (6) are provided with abutment holes, and each heat exchange pipe (2) is provided with a sealing abutment head on both sides.

7. The apparatus according to claim 1, characterized in that: The output end of the second fixed ring (6) is provided with one or more spray pipes (4), and the spray pipes (4) are provided with a pressure pump for spraying.

8. The apparatus according to claim 7, characterized in that: The liquid storage bag (7) is in the shape of an n and is made of elastic rubber material, and the liquid storage bag (7) is provided with a liquid storage cavity inside. Each heat exchange pipe (2) is made of metal material and contacts the exhaust pipe (3) to absorb the heat on the exhaust pipe (3). The outer circumferential surface of the heat exchange pipe (2) is provided with anti-skid texture.

Images