Enameling oven waste heat utilization device

Abstract

The utility model discloses an enameling oven waste heat utilization device which comprises a heat conduction air pipe, a heat exchanger, a first main pipe, a second main pipe and an annealing water tank, the heat conduction air pipe is connected with an enameling oven and the heat exchanger, one end of the first main pipe is connected with the heat exchanger, and the other end of the first main pipe is connected with a water outlet of the annealing water tank. The tail end of the second main pipe is connected with a water inlet of the annealing water tank; a first three-way proportional valve, a second three-way proportional valve and a third three-way proportional valve are sequentially arranged on the second main pipe from an inlet to an outlet, and the second main pipe is connected in parallel with a steam generator through the first three-way proportional valve, connected in parallel with a lithium bromide refrigerator through the second three-way proportional valve and connected in parallel with a hot water opening of an annealing water tank through the third three-way proportional valve; the second main pipe is further provided with a water supplementing pipe and a heating radiator, and a water outlet of the water supplementing pipe is arranged between the third three-way proportional valve and the annealing water tank. According to the scheme, high-temperature tail gas is finely distributed, so that the utilization efficiency of energy is improved, and the cost is saved.

Description

Technical Field

[0001] The utility model belongs to the technical field of waste heat utilization of drying furnaces, in particular to a waste heat utilization device for an enameling drying furnace. Background Art

[0002] Currently, the baking and heating costs of enameled wire production remain high. With energy shortages and fierce market competition, how to effectively save energy has become a focus of attention for all companies. In the enameled wire production process, the enameling oven produces a large amount of high-temperature exhaust gas. Directly discharging this energy wastes energy and is not conducive to environmental protection. In actual production, how to maximize the utilization efficiency of this energy is the key to reducing production costs. Because the existing technology is not sophisticated enough in the utilization of this part of high-temperature exhaust gas, a lot of energy is still wasted. It is necessary to design a device to finely distribute the high-temperature exhaust gas, reduce heat loss, and improve energy utilization. Utility Model Content

[0003] The purpose of the present invention is to provide a device for utilizing waste heat from an enameling oven to solve at least one aspect of the problems and defects raised in the above-mentioned background technology.

[0004] A device for utilizing waste heat from an enameling oven, comprising a heat-conducting air pipe, a heat exchanger, a first main pipe, a second main pipe, and an annealing water tank. The heat-conducting air pipe is provided with a suction fan, and the heat-conducting air pipe is connected to the enameling oven and the heat exchanger. One end of the first main pipe is connected to the heat exchanger, and the other end is connected to the water outlet of the annealing water tank. The first main pipe is provided with a water pump, and the first end of the second main pipe is connected to the heat exchanger, and the other end is connected to the water inlet of the annealing water tank.

[0005] The second main pipe is provided with a first three-way proportional valve, a second three-way proportional valve and a third three-way proportional valve in sequence from the inlet to the outlet. The second main pipe is connected in parallel to the steam generator through the first three-way proportional valve, to the lithium bromide refrigerator through the second three-way proportional valve, and to the hot water outlet of the annealing water tank through the third three-way proportional valve. The second main pipe is also provided with a water supply pipe and a radiator. The water supply pipe is provided with a solenoid valve. The water outlet of the water supply pipe is provided between the third three-way proportional valve and the annealing water tank. The radiator is provided between the water outlet of the water supply pipe and the annealing water tank.

[0006] Furthermore, the end of the second main pipe is divided into two pipes, the two pipes are respectively connected to the water inlet of the annealing tank, valves are provided on both pipes, and the radiator is provided on one of the pipes.

[0007] Furthermore, a first flow meter is provided on the pipeline connecting the first three-way proportional valve and the steam generator.

[0008] Furthermore, a second flow meter is provided on the pipeline connecting the second three-way proportional valve and the lithium bromide refrigerator.

[0009] Furthermore, a thermometer is provided on the second main pipe, and the thermometer is arranged between the water outlet of the water supply pipe and the annealing water tank.

[0010] Furthermore, the heat-conducting air pipe includes an air inlet pipe and an air outlet pipe, one end of the air inlet pipe is connected to the air outlet of the enameling furnace and the other end is connected to the heat exchanger, one end of the air outlet pipe is connected to the heat exchanger and the other end is connected to the outside world, and a catalytic combustion chamber is provided on the air inlet pipe.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] 1. This solution converts high-temperature exhaust gas into high-temperature hot water through a heat exchanger and designs multiple three-way proportional valves to finely distribute the high-temperature hot water. The energy of the high-temperature exhaust gas is used to achieve indoor cooling and heating, anti-oxidation of the enameled wire, and annealing and heat preservation of the enameled wire. This solution improves energy utilization and reduces losses through the fine distribution of the high-temperature exhaust gas from the enameling oven.

[0013] 2. This solution provides cold water through the water supply pipe to cool the water output to the annealing tank from the second main pipe. Hot water is introduced into the annealing tank through the third three-way proportional valve for heating, thereby adjusting the water temperature in the annealing tank to meet the annealing temperature requirements of copper wires of different specifications. This design regulates the water temperature in the annealing tank by distributing and utilizing high-temperature exhaust gas, eliminating the need for additional heating or cooling equipment and saving energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0016] In the figure: 101, air inlet pipe; 102, air outlet pipe; 103, suction fan; 104, catalytic combustion chamber;

[0017] 2. Heat exchanger; 301. First main pipe; 302. Second main pipe; 303. First three-way proportional valve;

[0018] 304. Second three-way proportional valve; 305. Third three-way proportional valve; 306. Thermometer; 4. Steam generator; 5. Lithium bromide refrigerator; 6. Water supply pipe; 7. Radiator; 8. Annealing water tank; 9. Water pump. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only for the purpose of explaining the present invention and are not intended to limit the present invention. That is, the embodiments described herein are only some embodiments of the present invention, not all embodiments. Generally, the components of the embodiments of the present invention described and illustrated in the drawings herein can be arranged and designed in a variety of different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0021] See also Figure 1 As shown, in the embodiment of the present invention, a device for utilizing waste heat from an enameling oven comprises a heat-conducting air pipe, a heat exchanger 2, a first main pipe 301, a second main pipe 302 and an annealing water tank 8. A suction fan 103 is provided on the heat-conducting air pipe. The heat-conducting air pipe is associated with the enameling oven and the heat exchanger 2. The high-temperature exhaust gas in the enameling oven is introduced into the heat exchanger 2 through the heat-conducting air pipe and is discharged after heat exchange in the heat exchanger 2. One end of the first main pipe 301 is connected to the heat exchanger 2 and the other end is connected to the water outlet of the annealing water tank 8. A water pump 9 is provided on the first main pipe 301. The first end of the second main pipe 302 is connected to the heat exchanger 2 and the end is connected to the annealing water tank 8. Annealing water tank 8 water inlet; the second main pipe 302 is provided with a first three-way proportional valve 303, a second three-way proportional valve 304 and a third three-way proportional valve 305 in sequence from the inlet to the outlet. The second main pipe 302 is connected in parallel to the steam generator 4 through the first three-way proportional valve 303, in parallel to the lithium bromide refrigerator 5 through the second three-way proportional valve 304, and in parallel to the hot water outlet of the annealing water tank 8 through the third three-way proportional valve 305. The second main pipe 302 is also provided with a water supply pipe 6, and the water supply pipe 6 is provided with a solenoid valve. The water outlet of the water supply pipe 6 is located between the second three-way proportional valve 304 and the annealing water tank 8.

[0022] The water in the first main pipe 301 is pumped into the heat exchanger 2 for heating by the water pump 9. The heated high-temperature water enters the second main pipe 302 and undergoes a primary distribution through the first three-way proportional valve 303. Part of the high-temperature water enters the steam generator 4, while the remaining high-temperature hot water continues to be transported to the water inlet of the annealing water tank 8 through the second main pipe 302. The opening of the first three-way proportional valve 303 can be adjusted as needed to adjust the flow rate of the high-temperature hot water entering the steam generator 4. This ensures the effect while reducing energy waste. The high-temperature hot water is converted into steam by the steam generator 4. The generated steam is used to prevent oxidation of the bare enameled wire. Through the primary refined distribution of the high-temperature hot water, energy loss is reduced and production costs are reduced.

[0023] The high-temperature hot water in the second main pipe 302 undergoes a second distribution when it reaches the second three-way proportional valve 304. Part of the high-temperature hot water enters the lithium bromide refrigerator 5, and the other part continues to be transported to the water inlet of the annealing tank 8 through the second main pipe 302. The opening of the second three-way proportional valve 304 can be adjusted as needed to adjust the flow rate of the high-temperature hot water entering the lithium bromide refrigerator 5, thereby ensuring sufficient flow and reducing energy waste. The high-temperature hot water will be used as a driving heat source for the lithium bromide refrigerator 5, and the lithium bromide refrigerator 5 can be used to cool the workshop to improve the working environment. Through the second refined distribution of the high-temperature hot water, energy loss is reduced and production costs are reduced.

[0024] The remaining high-temperature hot water in the second main pipe 302 will be collected into the annealing tank 8 through its water inlet. The water in the annealing tank 8 will be introduced into the first main pipe 301 by the water pump 9, thus achieving water circulation. The annealing tank 8 is equipped with a temperature sensor to monitor the water temperature in real time. Since the copper wire being annealed has different specifications and requires different water temperatures, cold water is introduced through the water supply pipe 6 to replenish the water loss in the circulation and regulate the water temperature in the annealing tank 8. The solenoid valve on the water supply pipe 6 can adjust the water supply amount.

[0025] When the water temperature in the annealing water tank 8 is insufficient and needs to be increased, the third three-way proportional valve 305 can be adjusted to introduce high-temperature hot water into the annealing water tank 8 from the hot water outlet of the annealing water tank 8 to increase the temperature of the annealing water tank 8 without the need for additional heating equipment. This design can heat the water temperature in the annealing water tank 8 without reducing the amount of water introduced by the water supply pipe 6. The amount of water supply can be guaranteed while the temperature is increased, thereby avoiding a reduction in the amount of water in the circulation and reducing efficiency.

[0026] It should be noted that a radiator 7 is also provided on the second main pipe 302. The radiator 7 is arranged between the water outlet of the water supply pipe 6 and the annealing water tank 8. To avoid excessive temperature, high-temperature water needs to be introduced into cold water through the water supply pipe 6 to cool down before entering the radiator 7. The temperature can be adjusted by adjusting the water supply amount of the water supply pipe 6. The radiator 7 can be used to heat the workshop that needs to keep warm.

[0027] Furthermore, the end of the second main pipe 302 is divided into two pipes, which are respectively connected to the water inlet of the annealing tank 8. Valves are provided on both pipes, and the radiator 7 is provided on one of the pipes. When the radiator 7 is not needed for heating, it is only necessary to close the valve of the pipe where the radiator 7 is located to reduce energy loss.

[0028] Furthermore, a first flow meter 402 is provided on the pipeline connecting the first three-way proportional valve 303 and the steam generator 4, and a second flow meter 502 is provided on the pipeline connecting the second three-way proportional valve 304 and the lithium bromide refrigerator 5. The flow meter can monitor the distributed flow in real time and make timely adjustments to improve energy utilization.

[0029] Furthermore, a thermometer 306 is provided on the second main pipe 302 , and the thermometer 306 is provided between the water outlet of the water supply pipe 6 and the annealing water tank 8 . The thermometer 306 can monitor the temperature of the water entering the radiator 7 in real time for real-time adjustment.

[0030] Furthermore, the heat-conducting air pipe includes an air inlet pipe 101 and an air outlet pipe 102. One end of the air inlet pipe 101 is connected to the air outlet of the enameling furnace and the other end is connected to the heat exchanger 2. One end of the air outlet pipe 102 is connected to the heat exchanger 2 and the other end is connected to the outside world. A catalytic combustion chamber 104 is provided on the air inlet pipe 101. The high-temperature exhaust gas in the enameling furnace enters the catalytic combustion chamber 104 through the air inlet pipe 101 under the drive of the suction fan 103. After catalytic combustion and decomposition of harmful substances, the high-temperature gas enters the heat exchanger 2 for heat exchange. After heat exchange and cooling, it is discharged to the outside world through the air outlet pipe 102. This design can reduce the pollution caused to the environment by the production of enameled wire.

[0031] The above content is merely an example and explanation of the structure of the present utility model. Technicians in this technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the utility model or exceed the scope defined by the claims, they should all fall within the scope of protection of the present utility model.

Claims

1. A device for utilizing waste heat from an enameling furnace, characterized in that: The heat conducting air pipe comprises a heat exchanger (2), a first main pipe (301), a second main pipe (302) and an annealing water tank (8); a suction fan (103) is provided on the heat conducting air pipe; the heat conducting air pipe is associated with the enameling oven and the heat exchanger (2); one end of the first main pipe (301) is connected to the heat exchanger (2) and the other end is connected to the water outlet of the annealing water tank (8); a water pump (9) is provided on the first main pipe (301); the first end of the second main pipe (302) is connected to the heat exchanger (2) and the tail end is connected to the water inlet of the annealing water tank (8); The second main pipe (302) is provided with a first three-way proportional valve (303), a second three-way proportional valve (304) and a third three-way proportional valve (305) in sequence from the inlet to the outlet. The second main pipe (302) is connected in parallel to the steam generator (4) through the first three-way proportional valve (303), connected in parallel to the lithium bromide refrigerator (5) through the second three-way proportional valve (304), and connected in parallel to the hot water outlet of the annealing water tank (8) through the third three-way proportional valve (305). The second main pipe (302) is also provided with a water supply pipe (6) and a radiator (7). The water supply pipe (6) is provided with a solenoid valve. The water outlet of the water supply pipe (6) is provided between the second three-way proportional valve (304) and the annealing water tank (8), and the radiator (7) is provided between the water outlet of the water supply pipe (6) and the annealing water tank (8).

2. The device for utilizing waste heat from an enameling furnace according to claim 1, characterized in that: The end of the second main pipe (302) is divided into two pipes, and the two pipes are respectively connected to the water inlet of the annealing water tank (8). Valves are provided on both pipes, and the radiator (7) is provided on one of the pipes.

3. The device for utilizing waste heat from an enameling furnace according to claim 1, characterized in that: A first flow meter (402) is provided on the pipeline connecting the first three-way proportional valve (303) and the steam generator (4).

4. The device for utilizing waste heat from an enameling furnace according to claim 1, characterized in that: A second flow meter (502) is provided on the pipeline connecting the second three-way proportional valve (304) and the lithium bromide refrigerator (5).

5. The device for utilizing waste heat from an enameling furnace according to claim 1, characterized in that: The second main pipe (302) is also provided with a thermometer (306), which is located between the water outlet of the water supply pipe (6) and the annealing water tank (8).

6. The device for utilizing waste heat from an enameling furnace according to claim 1, characterized in that: The heat-conducting air pipe comprises an air inlet pipe (101) and an air outlet pipe (102); one end of the air inlet pipe (101) is connected to the air outlet of the enameling oven and the other end is connected to the heat exchanger (2); one end of the air outlet pipe (102) is connected to the heat exchanger (2) and the other end is connected to the outside world; and a catalytic combustion chamber (104) is provided on the air inlet pipe (101).

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