Device for recycling waste heat of waste gas, open fire and waste heat of push disc type carburizing and quenching production line

Abstract

The utility model discloses a push disc type carburizing and quenching production line waste gas open fire waste heat recycling device which comprises a cleaning machine water tank, a heat collecting box and heat exchange coil pipes, a partition plate is arranged in the heat collecting box and divides the heat collecting box into an upper heat collecting cavity and a lower heat collecting cavity, and the heat exchange coil pipes comprise the upper heat exchange coil pipe and the lower heat exchange coil pipe. The upper heat exchange coil pipe and the lower heat exchange coil pipe are arranged in the upper heat collection cavity and the lower heat collection cavity correspondingly, the cleaning medium is heated through the upper heat exchange coil pipe and the lower heat exchange coil pipe in a heat exchange mode, and an adjusting baffle is arranged between the partition plate and the right side wall of the heat collection box. The cleaning machine water tank communicates with the upper heat exchange coil pipe and the lower heat exchange coil pipe through an upper water pipeline, and the upper heat exchange coil pipe and the lower heat exchange coil pipe are connected with the cleaning machine water tank through a water return pipeline. The waste heat is returned into the cleaning machine, continuous heating of the cleaning medium is achieved, electric energy does not need to be consumed any more, cost is reduced, the structure is simple, safety is achieved, and popularization is convenient.

Description

Technical Field

[0001] This utility model relates to the field of waste heat utilization technology in carburizing and quenching production lines, specifically a device for reusing waste heat from open flames in a pusher-type carburizing and quenching production line. Background Technology

[0002] A push-plate type carburizing and quenching production line generally includes a carburizing furnace, a cleaning machine, a tempering furnace, etc. Methanol, propane and other media are introduced into the carburizing furnace. The hydrogen, methane and other waste gases produced after cracking at high temperature need to be ignited by natural gas open flame at the exhaust gas inlet of the carburizing furnace to turn them into harmless substances such as carbon dioxide and water. The combustion process generates a lot of heat energy, and the conventional method is to directly discharge it, which causes a huge waste of energy.

[0003] Meanwhile, the cleaning machine in the push-plate carburizing and quenching production line requires a large amount of electricity to heat the cleaning medium, resulting in high power consumption and high overall process cost. To address these issues, a waste heat recovery device for open flame in the exhaust gas of the push-plate carburizing and quenching production line is proposed. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the existing defects and provide a device for reusing the waste heat of open flame in a pusher-type carburizing and quenching production line. This device can use the heat from the combustion of waste gas from the carburizing furnace to heat the cleaning medium in the cleaning machine, thereby saving energy consumption, reducing processing costs, and effectively solving the problems in the background technology.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a waste heat recovery device for open flame in a push-plate type carburizing and quenching production line, comprising a cleaning machine water tank, a heat collection box, and heat exchange coils. The heat collection box is internally equipped with a partition, which divides the heat collection box into an upper heat collection chamber and a lower heat collection chamber. The heat exchange coils include an upper heat exchange coil and a lower heat exchange coil, which are respectively installed in the upper and lower heat collection chambers. Heating of the cleaning medium is achieved through heat exchange via the upper and lower heat exchange coils. An adjusting baffle is provided between the partition and the right side wall of the heat collection box. The cleaning machine water tank is connected to the upper and lower heat exchange coils via water supply pipes, and the upper and lower heat exchange coils are connected to the cleaning machine water tank via return water pipes.

[0006] Furthermore, a heat collection hood is installed at the lower right end of the heat collection box, with the upper end of the heat collection hood corresponding to the adjustment baffle and the lower end of the heat collection hood corresponding to the exhaust flame.

[0007] Furthermore, a main exhaust duct is installed at the upper end of the solar collector box, and the lower end of the main exhaust duct corresponds to the adjusting baffle. A support column is installed at the lower part of the solar collector box.

[0008] Furthermore, a water pump and pressure gauge are installed on the water supply pipeline.

[0009] Furthermore, the water supply pipeline is also equipped with an air vent valve, a Y-type filter, and a shut-off valve. There are two shut-off valves, which are respectively installed on the pipelines where the inlet and outlet of the Y-type filter are located.

[0010] Compared with the prior art, the beneficial effects of this utility model are:

[0011] 1. By returning waste heat to the cleaning machine, the cleaning medium can be continuously heated without consuming electricity, thus reducing costs. The structure is simple, safe, and easy to promote.

[0012] 2. By adjusting the opening and closing degree of the baffle, the heat exchange efficiency of the heat exchange coil can be adjusted to ensure that the temperature of the cleaning medium is stable between 50-70℃; a pressure gauge is installed after the water pump to monitor whether the pipeline is blocked, ensuring the safe operation of the system. The baffle increases the length of the heat collection chamber, thereby extending the heat exchange time and improving the heat exchange effect. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] In the diagram: 1. Cleaning machine water tank; 2. Exhaust valve; 3. Return water pipe; 4. Inlet water pipe; 5. Lower heat exchange coil; 6. Heat collector box; 7. Main exhaust pipe; 8. Upper heat exchange coil; 9. Adjusting baffle; 10. Opening and closing handle; 11. Partition; 12. Heat collector cover; 13. Exhaust gas flame; 14. Support column; 15. Y-type filter; 16. Shut-off valve; 17. Water pump; 18. Pressure gauge. Detailed Implementation

[0015] In the description of this utility model, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0016] Please see Figure 1This utility model provides a technical solution: a waste heat recovery device for open flame in a push-plate type carburizing and quenching production line, comprising a cleaning machine water tank 1, a heat collection box 6, and heat exchange coils. The heat collection box 6 is internally equipped with a partition 11, which divides the heat collection box 6 into an upper heat collection chamber and a lower heat collection chamber. The partition 11 increases the length of the heat collection chamber, thereby extending the heat exchange time. The heat exchange coils include an upper heat exchange coil 8 and a lower heat exchange coil 5, which are respectively disposed in the upper and lower heat collection chambers. Heat exchange occurs through the upper and lower heat exchange coils 8 and 5. To heat the cleaning medium, an adjustable baffle 9 is installed between the partition 11 and the right side wall of the heat collection box 6. The opening and closing degree of the adjustable baffle 9 can be adjusted. When the adjustable baffle 9 is opened to a large degree, hot air directly enters the main exhaust pipe 7 upwards, reducing the heat entering the heat collection chamber. This can adjust the heat exchange efficiency of the heat exchange coil and ensure that the temperature of the cleaning medium is stable between 50-70℃. The cleaning machine water tank 1 is connected to the upper heat exchange coil 8 and the lower heat exchange coil 5 through the water supply pipe 4. The upper heat exchange coil 8 and the lower heat exchange coil 5 are connected to the cleaning machine water tank 1 through the return water pipe 3.

[0017] A heat collection hood 12 is installed at the lower right end of the heat collection box 6. The upper end of the heat collection hood 12 corresponds to the adjustment baffle 9, and the lower end of the heat collection hood 12 corresponds to the exhaust gas flame 13. The heat collection hood 12 collects heat, allowing most of the heat to enter the heat collection box 6, which can reduce heat loss. The fuel used by the exhaust gas flame 13 is hydrogen, methane and other exhaust gases produced by high-temperature cracking.

[0018] The upper end of the solar collector box 6 is provided with a main exhaust duct 7, the lower end of the main exhaust duct 7 corresponds to the adjusting baffle 9, the main exhaust duct 7 is connected to a fan and a chimney, and the lower part of the solar collector box 6 is provided with a support column 14, which plays the role of supporting the overall solar collector box 6.

[0019] A water pump 17 and a pressure gauge 18 are installed on the water supply pipe 4. The pressure gauge 18 is used to detect the pressure of the water supply pipe 4 in real time.

[0020] The water supply pipeline 4 is also equipped with an air vent valve 2, a Y-type filter 15, and a shut-off valve 16. The Y-type filter 15 is used to filter the cleaning medium. There are two shut-off valves 16, which are respectively installed on the pipelines where the inlet and outlet of the Y-type filter 15 are located. The air vent valve 2 is used to discharge the gas in the water supply pipeline 4.

[0021] Working principle: The cleaning medium in the cleaning machine water tank 1 is drawn out by the water pump 17, passes through the heat exchange coil in the heat collector box 6, and returns to the cleaning machine water tank 1, so as to realize the continuous heating of the cleaning medium without consuming electricity, thus reducing costs.

[0022] The foregoing has shown and described the basic principles, main features and advantages of this utility model. Various changes and modifications may be made to this utility model without departing from the spirit and scope thereof, and all such changes and modifications fall within the scope of this utility model as claimed.

Claims

1. A device for recovering waste heat from open flame in a push-plate type carburizing and quenching production line, comprising a cleaning machine water tank (1), a heat collection box (6), and a heat exchange coil, characterized in that: The heat collection box (6) is equipped with a partition (11) inside, which divides the heat collection box (6) into an upper heat collection chamber and a lower heat collection chamber. The heat exchange coil includes an upper heat exchange coil (8) and a lower heat exchange coil (5). The upper heat exchange coil (8) and the lower heat exchange coil (5) are respectively installed in the upper heat collection chamber and the lower heat collection chamber. An adjustment baffle (9) is installed between the partition (11) and the right side wall of the heat collection box (6). The cleaning machine water tank (1) is connected to the upper heat exchange coil (8) and the lower heat exchange coil (5) through the water supply pipe (4). The upper heat exchange coil (8) and the lower heat exchange coil (5) are connected to the cleaning machine water tank (1) through the return water pipe (3).

2. The waste gas open flame waste heat recovery device for a push-plate type carburizing and quenching production line according to claim 1, characterized in that: A heat collection cover (12) is provided at the lower right end of the heat collection box (6). The upper end of the heat collection cover (12) corresponds to the adjustment baffle (9), and the lower end of the heat collection cover (12) corresponds to the exhaust flame (13).

3. The waste gas open flame waste heat recovery device for a push-plate type carburizing and quenching production line according to claim 1, characterized in that: The upper end of the heat collection box (6) is provided with a main exhaust pipe (7), the lower end of the main exhaust pipe (7) corresponds to the adjusting baffle (9), and the lower part of the heat collection box (6) is provided with a support column (14).

4. The waste gas open flame waste heat recovery device for a pusher-type carburizing and quenching production line according to claim 1, characterized in that: A water pump (17) and a pressure gauge (18) are installed on the water supply pipeline (4).

5. The waste gas open flame waste heat recovery device for a pusher-type carburizing and quenching production line according to claim 1, characterized in that: The water supply pipeline (4) is also equipped with an air vent valve (2), a Y-type filter (15) and a shut-off valve (16). There are two shut-off valves (16), which are respectively installed on the pipelines where the inlet and outlet ends of the Y-type filter (15) are located.

6. The waste gas open flame waste heat recovery device for a pusher-type carburizing and quenching production line according to claim 1, characterized in that: One side of the adjusting baffle (9) is connected to an opening and closing handle (10), which extends to the outside of the heat collection box (6).

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