Waste heat recovery device of hot cleaning furnace

Abstract

The utility model discloses a waste heat recovery device of a hot cleaning furnace, which relates to the technical field of waste heat recovery devices, and comprises a water containing barrel, the bottom of the water containing barrel is communicated with a gas receiving pipe, the top of the water containing barrel is provided with a top cover disc, and the upper end of the top cover disc is communicated with an exhaust pipe; the branch guide pipes are arranged in the water containing barrel, the eight branch guide pipes are annularly distributed relative to the circle center point of the water containing barrel, and the two ends of each branch guide pipe communicate with the air receiving pipe and the exhaust pipe correspondingly; and the top frame is arranged on the upper end position of the exhaust pipe in a communicating mode, an inner inserting groove is formed in the top frame, and an activated carbon plate frame is installed in the inner inserting groove in an inserted connection mode. However, the discharged flue gas still contains relatively high pollution components, so that pollution is caused by the flue gas discharged after the waste heat is recovered.

Description

Technical Field

[0001] This utility model relates to the technical field of waste heat recovery devices, specifically a waste heat recovery device for a thermal cleaning furnace. Background Technology

[0002] A thermal cleaning furnace is a device specifically designed for processing and removing coatings from metal surfaces. It is mainly used for removing plastic, paint, and other organic coatings. During operation, the thermal cleaning furnace emits high-temperature flue gas, which requires waste heat recovery.

[0003] For example, the announcement number is CN217818186U (named "A Waste Heat Recovery Device for a Thermal Cleaning Furnace"), which includes a water storage tank. The water storage tank contains a heat exchange mechanism. The top and bottom of the heat exchange mechanism are respectively connected to an inlet pipe and a guide pipe, both of which penetrate the water storage tank. The bottom end of the guide pipe is connected to a guide pump, and the outlet of the guide pump is connected to an exhaust pipe. A cooling water agitation mechanism is installed on the water storage tank. The heat exchange mechanism includes an upper horizontal pipe, a lower horizontal pipe, and a heat exchange diversion pipe. The top and bottom ends of the heat exchange diversion pipe are respectively connected to the upper horizontal pipe. The upper and lower horizontal pipes are connected together, and multiple heat exchange diversion pipes are grouped together. These groups of heat exchange diversion pipes are correspondingly arranged between the upper and lower horizontal pipes. The cooling water agitation mechanism includes a drive motor, a rotating rod, and agitating blades. The output end of the drive motor is connected to the rotating rod, and one end of the rotating rod passes through the water storage tank. Multiple evenly arranged agitating blades are fixedly connected to the rotating rod. The agitating blades are located inside the water storage tank. When the flue gas passes through the water storage tank, it is divided into multiple streams of flue gas by the heat exchange diversion pipes. The smaller streams of flue gas are more conducive to heat exchange and can effectively improve the waste heat recovery efficiency.

[0004] The aforementioned waste heat recovery device improves the recovery rate of waste heat from flue gas by setting multiple diversion pipes, but the discharged flue gas still contains a high level of pollutants, causing pollution problems after the waste heat is recovered. Therefore, we provide a waste heat recovery device for a thermal cleaning furnace. Utility Model Content

[0005] The purpose of this utility model is to provide a waste heat recovery device for a thermal cleaning furnace, in order to solve the problem mentioned in the background art that the existing waste heat recovery devices improve the recovery rate of waste heat from flue gas by setting multiple diversion pipes, but the discharged flue gas still contains a high level of pollutants, resulting in pollution caused by the discharged flue gas after waste heat recovery.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a waste heat recovery device for a thermal cleaning furnace, comprising a water cylinder, a gas inlet pipe connected to the bottom of the water cylinder, a top cover plate provided at the top of the water cylinder, and an exhaust pipe connected to the upper end of the top cover plate.

[0007] Also includes:

[0008] Branch conduits are installed inside the water cylinder. There are eight branch conduits, which are arranged in a ring about the center point of the water cylinder. The two ends of the eight branch conduits are respectively connected to the air inlet pipe and the air outlet pipe.

[0009] The top frame is connected to the upper end of the exhaust pipe, and the top frame has an inner slot, into which an activated carbon plate frame is inserted and installed.

[0010] A float is installed inside the water-filling cylinder, and a hollow rod is integrally formed at the upper end of the float.

[0011] The rear support is located at the rear end of the water cylinder. There are two rear supports, and each end of the two rear supports is welded with a mounting base.

[0012] Preferably, the upper end of the top cover plate is connected to a water inlet, and a sealing cap is placed and installed in the inner circular opening of the water inlet.

[0013] Preferably, a drain valve is connected to one side of the outer wall of the water cylinder, and a water outlet pipe is connected to the water outlet end of the drain valve.

[0014] Preferably, two connecting rods are provided at the connection positions of the two rear brackets and the water cylinder, and the two ends of the connecting rods are welded to the rear bracket and the water cylinder respectively.

[0015] Preferably, one end of the activated carbon plate frame is integrally formed with a handle end seat, the size of which is larger than the diameter of the inner slot.

[0016] Preferably, a temperature sensor is integrally formed on the front end face of the water cylinder, and the sensing end of the temperature sensor is located inside the water cylinder.

[0017] Preferably, a lifting guide hole is provided at the connection position between the hollow rod and the top cover plate, and the lifting guide hole and the top cover plate are an integral structure.

[0018] Compared with the prior art, the beneficial effects of this utility model are:

[0019] This utility model uses a temperature sensor to monitor the water temperature in the water tank in real time. Once the required water temperature is reached, the drain valve is opened, and the water in the water tank is discharged through the outlet pipe. After the flue gas undergoes waste heat recovery, it is discharged into the top frame through the exhaust pipe. The flue gas is filtered and adsorbed by activated carbon plates installed inside the top frame. After waste heat recovery, the temperature of the flue gas is significantly reduced, avoiding the impact of high-temperature flue gas on the service life of the activated carbon filter. After adsorption and filtration by the activated carbon filter in the activated carbon plate frame, the low-temperature flue gas can be discharged with reduced pollution. This overcomes the problem that existing waste heat recovery devices improve the recovery rate of waste heat from flue gas by setting multiple diversion pipes, but the discharged flue gas still contains high levels of pollutants, causing pollution after waste heat recovery. Attached Figure Description

[0020] Figure 1 This is a front view of the structure of the waste heat recovery device for the thermal cleaning furnace of this utility model;

[0021] Figure 2 This is a rear view of the structure of the waste heat recovery device for the thermal cleaning furnace of this utility model;

[0022] Figure 3 This is a bottom view of the structure of the waste heat recovery device for the thermal cleaning furnace of this utility model;

[0023] Figure 4 This is a schematic diagram of the internal structure of the waste heat recovery device for the thermal cleaning furnace of this utility model;

[0024] In the diagram: 1. Water tank; 2. Temperature sensor; 3. Rear bracket; 4. Connecting rod; 5. Mounting base; 6. Top cover plate; 7. Lifting guide hole; 8. Exhaust pipe; 9. Top frame; 10. Activated carbon plate frame; 11. Water inlet; 12. Sealing cap; 13. Air inlet pipe; 14. Drain valve; 15. Water outlet pipe; 16. Inner slot; 17. Handle end seat; 18. Branch conduit; 19. Float; 20. Hollow rod. Detailed Implementation

[0025] 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.

[0026] Please see Figure 1-4 An embodiment of this utility model is provided: a waste heat recovery device for a thermal cleaning furnace, including a water tank 1, a gas inlet pipe 13 connected to the bottom of the water tank 1, a top cover plate 6 provided to the top of the water tank 1, and an exhaust pipe 8 connected to the upper end of the top cover plate 6.

[0027] Also includes:

[0028] Branch conduits 18 are installed inside the water tank 1. There are eight branch conduits 18, which are arranged in a ring about the center point of the water tank 1. The two ends of the eight branch conduits 18 are respectively connected to the air inlet pipe 13 and the exhaust pipe 8.

[0029] The top frame 9 is connected to the upper end of the exhaust pipe 8, and the top frame 9 has an inner slot 16 inside, and an activated carbon plate frame 10 is inserted and installed inside the inner slot 16.

[0030] The float 19 is installed inside the water cylinder 1, and the upper end of the float 19 is integrally formed with a hollow rod 20;

[0031] The rear bracket 3 is located at the rear end of the water tank 1. There are two rear brackets 3, and each end of the two rear brackets 3 is welded with a mounting base 5.

[0032] In use, connect the gas inlet pipe 13 to the flue gas exhaust pipe of the thermal cleaning furnace, and then inject sufficient clean water into the water tank 1 through the water inlet 11. After the high-temperature flue gas enters through the gas inlet pipe 13, it is guided inside the water tank 1 through eight branch pipes 18, so that the heat is evenly exchanged with the clean water in the thermal cleaning furnace, and the clean water is heated to achieve the purpose of waste heat recovery. During the heating process, the temperature sensor 2 detects the water temperature in the water tank 1 in real time. After the required water temperature is reached, the drain valve 14 is opened, and the water in the water tank 1 is discharged through the water outlet pipe 15. After the flue gas has undergone waste heat recovery, it is discharged into the top frame 9 through the exhaust pipe 8. The activated carbon plate frame 10 installed inside the top frame 9 filters and adsorbs the flue gas. After the flue gas has undergone waste heat recovery, the temperature is greatly reduced, avoiding the high-temperature flue gas from affecting the service life of the activated carbon filter. After being adsorbed and filtered by the activated carbon filter in the activated carbon plate frame 10, the low-temperature flue gas can be discharged with reduced pollution.

[0033] Please see Figure 1 The upper end of the top cover plate 6 is connected to a water inlet 11. A sealing cap 12 is placed and installed in the inner circular opening of the water inlet 11. The water inlet 11 connected to the upper end of the top cover plate 6 facilitates the injection of clean water into the water cylinder 1 for waste heat recovery. Please refer to [link / reference]. Figure 1 A drain valve 14 is connected to one side of the outer wall of the water cylinder 1. A water outlet pipe 15 is connected to the outlet end of the drain valve 14. The drain valve 14 connected to one side of the outer wall of the water cylinder 1 controls the opening and closing of the water outlet pipe 15 and the flow rate. Please refer to [link / reference]. Figure 1 Two connecting rods 4 are provided at the connection points between the two rear supports 3 and the water tank 1. The two ends of the connecting rods 4 are welded to the rear supports 3 and the water tank 1 respectively. The two connecting rods 4 at the connection points between the two rear supports 3 and the water tank 1 serve to support and connect the rear supports 3 and the water tank 1. Please refer to [link / reference]. Figure 2 One end of the activated carbon plate frame 10 is integrally formed with a handle end seat 17. The size of the handle end seat 17 is larger than the diameter of the inner slot 16. The handle end seat 17 integrally formed on one end of the activated carbon plate frame 10 facilitates the gripping and disassembly of the activated carbon plate frame 10. Please refer to [link / reference]. Figure 1 A temperature sensor 2 is integrally formed on the front surface of the water tank 1. The sensing end of the temperature sensor 2 is located inside the water tank 1. The temperature sensor 2 is used to monitor the water temperature inside the water tank 1. The model of the temperature sensor 2 is PT1000. Please refer to [link / reference]. Figure 1 and Figure 4 A lifting guide hole 7 is provided at the connection position between the hollow rod 20 and the top cover plate 6. The lifting guide hole 7 and the top cover plate 6 are an integral structure. The lifting guide hole 7 provided at the connection position between the hollow rod 20 and the top cover plate 6 serves to facilitate the lifting and lowering movement of the hollow rod 20, thereby determining the internal water level of the water cylinder 1.

[0034] 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. A waste heat recovery device for a hot cleaning furnace, comprising a water-filled cylinder (1), a gas inlet pipe (13) is arranged at the bottom of the water-filled cylinder (1), a top cover disc (6) is arranged at the top of the water-filled cylinder (1), and an exhaust pipe (8) is arranged at the upper end of the top cover disc (6); characterized in that Further comprising: Branch pipes (18) are arranged in the interior of the water-filled cylinder (1), eight branch pipes (18) are arranged in a ring shape about the center point of the water-filled cylinder (1), and the two ends of the eight branch pipes (18) are respectively arranged in communication with the gas inlet pipe (13) and the exhaust pipe (8); A top frame (9) is arranged in communication at the upper end position of the exhaust pipe (8), and an inner insertion slot (16) is arranged in the interior of the top frame (9), and an activated carbon plate frame (10) is arranged in the interior of the inner insertion slot (16) in a plug-in manner; A floating ball (19) is arranged in the interior of the water-filled cylinder (1), and a hollow rod (20) is integrally formed at the upper end of the floating ball (19); Two rear supports (3) are arranged at the rear end position of the water-filled cylinder (1), and mounting seats (5) are welded at the two ends of the two rear supports (3).

2. A heat recovery unit for a thermal cleaning furnace according to claim 1, characterized in that: A water injection opening (11) is arranged in communication at the upper end of the top cover disc (6), and a sealing cover (12) is arranged in the interior circular opening of the water injection opening (11).

3. The waste heat recovery device for a thermal cleaning furnace according to claim 1, characterized in that: A drain valve (14) is arranged in communication on the outer wall of one side of the water-filled cylinder (1), and a water outlet pipe (15) is arranged in communication at the water outlet end of the drain valve (14).

4. The waste heat recovery device for a thermal cleaning furnace according to claim 1, characterized by: Two connecting rods (4) are arranged at the connecting positions of the two rear supports (3) and the water-filled cylinder (1), and the two ends of the connecting rods (4) are respectively welded to the rear supports (3) and the water-filled cylinder (1).

5. The heat recovery unit of claim 1, wherein: A handle end seat (17) is integrally formed at one end of the activated carbon plate frame (10), and the size of the handle end seat (17) is greater than the caliber of the inner insertion slot (16).

6. A heat recovery unit for a thermal cleaning furnace according to claim 1, characterized in that: A temperature sensor (2) is integrally formed on the front end face of the water-filled cylinder (1), and the sensing end of the temperature sensor (2) is located in the interior of the water-filled cylinder (1).

7. The waste heat recovery device of claim 1, wherein: A lifting guide hole (7) is arranged at the penetrating position of the hollow rod (20) and the top cover disc (6), and the lifting guide hole (7) and the top cover disc (6) are an integral structure.

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