Hot galvanizing waste heat recovery device

Abstract

The utility model discloses a hot galvanizing waste heat recovery device which comprises a surrounding cover, a recovery assembly is installed outside the surrounding cover, the recovery assembly comprises an air exhaust fan fixedly installed in the middle of the outer wall of one side of the surrounding cover, and the air exhaust fan is communicated with the inner space of the surrounding cover. A tubular flue gas heat exchanger is fixedly installed on the outer wall of the top of the surrounding cover, a first connecting pipe is fixedly inserted between the exhaust fan and the tubular flue gas heat exchanger, a second connecting pipe is fixedly inserted on the outer wall of one side of the tubular flue gas heat exchanger, and two vertically-arranged gas ejector pipes are rotationally connected into the surrounding cover. According to the recycling device for the galvanizing bath, the recycling assembly is arranged, heat generated by the galvanizing bath can be comprehensively recycled, air flow circulates in the surrounding cover all the time, the heat is effectively prevented from dissipating outwards, and the recycling effect can be improved.

Description

Technical Field

[0001] This utility model relates to the field of galvanizing equipment technology, specifically to a waste heat recovery device for hot-dip galvanizing. Background Technology

[0002] In traditional hot-dip galvanizing production, the high-temperature flue gas generated in the zinc bath is usually directly released into the atmosphere. This flue gas is very hot and carries a large amount of heat energy; direct release not only wastes energy but also causes thermal pollution to the environment.

[0003] A search revealed a utility model patent with Chinese patent publication number CN222007975U, which discloses a waste heat recovery and utilization device for hot-dip galvanizing. The device includes a galvanizing tank body, a fixed support plate installed at one end of the galvanizing tank body, a multi-stage hydraulic cylinder mounted on the fixed support plate, a lifting top plate mounted on the telescopic end of the multi-stage hydraulic cylinder, a hollow rotating rod rotatably connected to the lifting top plate, a wind collector hood connected to the bottom end of the hollow rotating rod, a rotating joint mounted at the top end of the hollow rotating rod, and an exhaust fan mounted on the lifting top plate.

[0004] The above-mentioned device recovers hot flue gas through a collecting hood. However, due to its small area, the heat cannot be completely collected, and some flue gas inevitably cannot be collected, resulting in heat loss. There is room for improvement. Utility Model Content

[0005] The purpose of this invention is to provide a waste heat recovery device for hot-dip galvanizing to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a hot-dip galvanizing waste heat recovery device, comprising a surrounding cover, a recovery component installed outside the surrounding cover, the recovery component including an exhaust fan fixedly installed at the middle position of one side of the outer wall of the surrounding cover, and the exhaust fan being connected to the internal space of the surrounding cover; a tubular flue gas heat exchanger fixedly installed on the top outer wall of the surrounding cover; a first connecting pipe fixedly inserted between the exhaust fan and the tubular flue gas heat exchanger; a second connecting pipe fixedly inserted on one side of the outer wall of the tubular flue gas heat exchanger; and two vertically arranged jet pipes rotatably connected inside the surrounding cover, with both jet pipes rotatably connected inside the second connecting pipe.

[0007] It can fully recover the heat generated by the galvanizing tank, and the airflow always circulates inside the enclosure, effectively preventing heat from escaping outward and improving the recovery effect. When the exhaust fan on the outside of the enclosure is started, the exhaust fan draws the air inside the enclosure outward. The hot flue gas then enters the tubular flue gas heat exchanger through connecting pipe one, where the heat is absorbed. Then, it enters two jet pipes through connecting pipe two, and then returns to the enclosure through the nozzles of the jet pipes. The airflow generated can also carry the hot flue gas to be extracted by the exhaust fan in time, avoiding natural loss due to excessive residence time.

[0008] As a further preferred embodiment of this technical solution, an electric telescopic rod is fixedly installed on the top outer wall of the enclosure, and a horizontally arranged drive frame is fixedly connected to the output end of the electric telescopic rod. A toothed ring is coaxially fixed on the outer circumference of each of the two jet pipes. Two racks are provided on the outside of the drive frame, and the two racks mesh with the two toothed rings respectively.

[0009] As a further preferred embodiment of this technical solution, a feeding assembly is installed outside the enclosure, and the feeding assembly is located at the bottom of the enclosure.

[0010] As a further preferred embodiment of this technical solution, a horizontally arranged support frame is fixedly connected to the bottom of one end of the outer wall of the enclosure, a holding frame is placed on the top of the support frame, a through hole adapted to the holding frame is opened inside the enclosure, and a vertically arranged connecting seat is fixedly installed on one end of the outer wall of the holding frame.

[0011] As a further preferred embodiment of this technical solution, a lead screw is rotatably connected inside the support frame, and a connecting seat is threaded onto the outside of the lead screw. Two horizontally arranged guide rods are fixedly connected inside the support frame, and the connecting seat is slidably sleeved on the outside of the two guide rods. A motor is fixedly installed on the outer wall of one end of the support frame, and the output end of the motor is coaxially fixed with one end of the lead screw.

[0012] To load materials into the galvanizing equipment, first place the workpiece inside the holding frame, then start the motor to drive the lead screw to rotate. The connecting seat, which is sleeved on the outside of the two guide rods, cannot rotate. The rotating lead screw can then drive the connecting seat to move closer to the enclosure. Subsequently, the holding frame will also move synchronously with the connecting seat, and the workpiece will also move into the enclosure. The outer part of the holding frame can then close the opening of the enclosure.

[0013] As a further preferred embodiment of this technical solution, the outer wall of the other end of the enclosure is provided with a mounting hole, and a door is installed inside the mounting hole.

[0014] As a further preferred embodiment of this technical solution, the enclosure is made of color steel rock wool sandwich panel material.

[0015] This utility model provides a waste heat recovery device for hot-dip galvanizing, which has the following beneficial effects:

[0016] (1) By setting up a recovery component, this utility model can fully recover the heat generated by the galvanizing pool, and the airflow always circulates inside the enclosure, effectively preventing the heat from dissipating outward, which is conducive to improving the recovery effect. When the exhaust fan on the outside of the enclosure is started, the exhaust fan draws the air inside the enclosure outward, and the hot flue gas then enters the tubular flue gas heat exchanger through the first connecting pipe, where the heat is absorbed. Then, it enters the two jet pipes through the second connecting pipe, and then returns to the enclosure through the nozzle of the jet pipe. The generated airflow can also drive the hot flue gas to be extracted by the exhaust fan in time, avoiding natural loss caused by excessive residence time.

[0017] (2) By setting up a feeding component, if it is necessary to feed the galvanizing equipment, the workpiece is first placed inside the holding frame, and then the motor is started to drive the lead screw to rotate. The connecting seat sleeved outside the two guide rods cannot rotate. The rotating lead screw can drive the connecting seat to move closer to the enclosure. Then the holding frame will also move synchronously with the connecting seat, and the workpiece will also move into the enclosure. The part outside the holding frame can close the opening of the enclosure. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the overall first-view structure of this utility model;

[0019] Figure 2 This is a schematic diagram of the overall second-view structure of this utility model;

[0020] Figure 3 For the present utility model Figure 1 Enlarged structural diagram at point A;

[0021] Figure 4 For the present utility model Figure 2 Enlarged structural diagram at point B;

[0022] In the diagram: 1. Enclosure; 2. Box door; 3. Recycling assembly; 4. Feeding assembly; 301. Exhaust fan; 302. Tubular flue gas heat exchanger; 303. Connecting pipe one; 304. Connecting pipe two; 305. Jet pipe; 306. Gear ring; 307. Electric telescopic rod; 308. Drive frame; 401. Support frame; 402. Container frame; 403. Connecting seat; 404. Lead screw; 405. Guide rod; 406. Motor. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention.

[0024] This utility model provides a technical solution: such as Figure 2 As shown in Figure 4, in this embodiment, a hot-dip galvanizing waste heat recovery device includes a surrounding cover 1. A recovery component 3 is installed outside the surrounding cover 1. The recovery component 3 includes an exhaust fan 301 fixedly installed at the middle position of one side of the outer wall of the surrounding cover 1, and the exhaust fan 301 is connected to the internal space of the surrounding cover 1. A tubular flue gas heat exchanger 302 is fixedly installed on the top outer wall of the surrounding cover 1. The same connecting pipe 303 is fixedly inserted between the exhaust fan 301 and the tubular flue gas heat exchanger 302. A connecting pipe 304 is fixedly inserted on one side of the outer wall of the tubular flue gas heat exchanger 302. Two vertically arranged jet pipes 305 are rotatably connected inside the surrounding cover 1, and both jet pipes 305 are rotatably connected inside the connecting pipe 304. A hoisting device can be installed on the top of the surrounding cover 1. A clamping device is installed on the movable end of the hoisting device. The clamping device can transfer the workpiece inside the holding frame 402 to the galvanizing tank.

[0025] An electric telescopic rod 307 is fixedly installed on the top outer wall of the enclosure 1. A horizontally arranged drive frame 308 is fixedly connected to the output end of the electric telescopic rod 307. A toothed ring 306 is coaxially fixed on the outer circumference of each of the two jet pipes 305. Two racks are provided on the outside of the drive frame 308, and the two racks mesh with the two toothed rings 306 respectively.

[0026] The exhaust fan 301 on the outside of the enclosure 1 is started, and the exhaust fan 301 draws the air inside the enclosure 1 outward. The hot flue gas then enters the tubular flue gas heat exchanger 302 through the first connecting pipe 303, where the heat is absorbed. Then, it enters the two jet pipes 305 through the second connecting pipe 304, and then returns to the inside of the enclosure 1 through the nozzles of the jet pipes 305. The airflow generated can also carry the hot flue gas to be drawn out by the exhaust fan 301 in time, avoiding natural loss due to excessive residence time. At the same time, the electric telescopic rod 307 on the top of the enclosure 1 is started. The electric telescopic rod 307 drives the drive frame 308 to move back and forth. The external rack of the drive frame 308 drives the jet pipe 305 to swing through the toothed ring 306 that meshes with it. As a result, the airflow ejected from the jet pipe 305 will also swing, which helps to improve the driving efficiency.

[0027] like Figure 2 and Figure 3 As shown, a feeding assembly 4 is installed on the outside of the enclosure 1, and the feeding assembly 4 is located at the bottom of the enclosure 1.

[0028] A horizontally arranged support frame 401 is fixedly connected to the bottom of the outer wall of one end of the enclosure 1. A holding frame 402 is placed on the top of the support frame 401. A through hole adapted to the holding frame 402 is opened inside the enclosure 1. A vertically arranged connecting seat 403 is fixedly installed on the outer wall of one end of the holding frame 402.

[0029] A lead screw 404 is rotatably connected inside the support frame 401. A connecting seat 403 is threaded onto the outside of the lead screw 404. Two horizontally arranged guide rods 405 are fixedly connected inside the support frame 401. The connecting seat 403 is slidably sleeved onto the outside of the two guide rods 405. A motor 406 is fixedly installed on the outer wall of one end of the support frame 401. The output end of the motor 406 is coaxially fixed with one end of the lead screw 404.

[0030] To load materials into the galvanizing equipment, first place the workpiece inside the holding frame 402, then start the motor 406 to drive the lead screw 404 to rotate. The connecting seat 403, which is sleeved outside the two guide rods 405, cannot rotate. The rotating lead screw 404 can drive the connecting seat 403 to move closer to the enclosure 1. Subsequently, the holding frame 402 will also move synchronously with the connecting seat 403, and the workpiece will also move into the enclosure 1. The outer part of the holding frame 402 can then close the opening of the enclosure 1.

[0031] like Figure 2 As shown, the outer wall of the other end of the enclosure 1 has a mounting hole, and a door 2 is installed inside the mounting hole. If it is necessary to inspect the equipment inside the enclosure 1, it can be easily entered by opening the door 2.

[0032] like Figure 1 As shown in Figure 2, the enclosure 1 is made of color steel rock wool sandwich panel material, which helps to ensure the heat resistance of the packaging cover 1 and prevents heat from dissipating outward.

[0033] This utility model provides a waste heat recovery device for hot-dip galvanizing, the specific working principle of which is as follows:

[0034] When the device is in operation, the enclosure 1 surrounds the outside of the galvanizing tank, ensuring that the generated hot flue gas remains inside the enclosure 1 and does not escape outwards. The exhaust fan 301 on the outside of the enclosure 1 is activated, drawing air outwards from inside the enclosure 1. The hot flue gas then enters the tubular flue gas heat exchanger 302 through connecting pipe 1 303, where its heat is absorbed. Next, it enters two jet pipes 305 through connecting pipe 2 304, and then returns to the inside of the enclosure 1 through the nozzles of the jet pipes 305. The resulting airflow also helps the exhaust fan 301 to promptly remove the hot flue gas, preventing excessive heat loss due to prolonged residence. Simultaneously, the electric telescopic rod 307 on the top of the enclosure 1 is activated, driving the... The frame 308 moves back and forth. The external rack of the drive frame 308 drives the jet pipe 305 to swing through the gear ring 306 that meshes with it. As a result, the airflow ejected from the jet pipe 305 also swings, which helps to improve the pushing efficiency. If it is necessary to feed the galvanizing equipment, first put the workpiece into the holding frame 402, then start the motor 406 to drive the lead screw 404 to rotate. The connecting seat 403 sleeved on the outside of the two guide rods 405 cannot rotate. The rotating lead screw 404 can drive the connecting seat 403 to move closer to the enclosure 1. Then the holding frame 402 will also move synchronously with the connecting seat 403, and the workpiece will also move into the enclosure 1. The outer part of the holding frame 402 can close the opening of the enclosure 1.

[0035] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A waste heat recovery device for hot-dip galvanizing, comprising a surrounding cover (1), characterized in that: The enclosure (1) is equipped with a recovery assembly (3). The recovery assembly (3) includes an exhaust fan (301) fixedly installed at the middle position of one side of the outer wall of the enclosure (1). The exhaust fan (301) is connected to the internal space of the enclosure (1). A tubular flue gas heat exchanger (302) is fixedly installed on the top outer wall of the enclosure (1). The exhaust fan (301) and the tubular flue gas heat exchanger (302) are fixedly connected by the same connecting pipe (303). A connecting pipe (304) is fixedly connected to one side of the outer wall of the tubular flue gas heat exchanger (302). Two vertically arranged jet pipes (305) are rotatably connected inside the enclosure (1). Both jet pipes (305) are rotatably connected inside the connecting pipe (304).

2. The waste heat recovery device for hot-dip galvanizing according to claim 1, characterized in that: An electric telescopic rod (307) is fixedly installed on the top outer wall of the enclosure (1). The output end of the electric telescopic rod (307) is fixedly connected to a horizontally arranged drive frame (308). A toothed ring (306) is coaxially fixed on the outer circumference of each of the two jet pipes (305). Two racks are provided on the outside of the drive frame (308), and the two racks mesh with the two toothed rings (306) respectively.

3. The waste heat recovery device for hot-dip galvanizing according to claim 1, characterized in that: A feeding assembly (4) is installed on the outside of the enclosure (1), and the feeding assembly (4) is located at the bottom of the enclosure (1).

4. The waste heat recovery device for hot-dip galvanizing according to claim 3, characterized in that: A horizontally arranged support frame (401) is fixedly connected to the bottom of the outer wall of one end of the enclosure (1). A holding frame (402) is placed on the top of the support frame (401). A through hole adapted to the holding frame (402) is opened inside the enclosure (1). A vertically arranged connecting seat (403) is fixedly installed on the outer wall of one end of the holding frame (402).

5. A waste heat recovery device for hot-dip galvanizing according to claim 4, characterized in that: The support frame (401) is rotatably connected to a lead screw (404), and the connecting seat (403) is threaded onto the outside of the lead screw (404). The support frame (401) is fixedly connected to two horizontally arranged guide rods (405), and the connecting seat (403) is slidably sleeved on the outside of the two guide rods (405). A motor (406) is fixedly installed on the outer wall of one end of the support frame (401), and the output end of the motor (406) is coaxially fixed with one end of the lead screw (404).

6. The waste heat recovery device for hot-dip galvanizing according to claim 1, characterized in that: The outer wall of the other end of the enclosure (1) has an installation hole, and a door (2) is installed inside the installation hole.

7. The waste heat recovery device for hot-dip galvanizing according to claim 1, characterized in that: The enclosure (1) is made of color steel rock wool sandwich panel material.

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