Energy-saving electric furnace

Abstract

The utility model relates to the technical field of electric furnaces, and particularly discloses an energy-saving electric furnace. A first air outlet pipe and a water tank are arranged on the side face of the electric furnace body, a heat exchange pipe is arranged in the water tank, a second air outlet pipe is arranged on the side wall of the water tank, the outer wall of the heat exchange pipe makes contact with liquid in the water tank, and the air outlet end of the heat exchange pipe is arranged at the bottom of the water tank. A liquid inlet pipe is arranged at the top of the water tank, a liquid outlet pipe is arranged at the bottom of the water tank, a first electromagnetic valve and a second electromagnetic valve are arranged on the liquid inlet pipe and the liquid outlet pipe respectively, a temperature sensor is arranged in the water tank, and a control system is arranged on the outer side of the water tank. Waste gas generated in the operation process of the electric furnace exchanges heat with liquid in the water tank through the heat exchange pipe and then is discharged out of the water tank, the waste gas fully exchanges heat with the liquid in the water tank, and the heat recovery efficiency of the electric furnace is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of electric furnaces, and particularly relates to an energy-saving electric furnace. Background Art

[0002] An electric furnace refers to an industrial electric furnace and a household electric furnace that utilize the electrothermal effect for heating.

[0003] During the use of traditional electric furnaces, a large amount of waste gas is generated. The waste gas usually contains a large amount of heat energy. In the prior art, the waste gas generated by the electric furnace is usually introduced into a water tank through a gas pipe by a blower. The waste gas with a large amount of heat energy heats the cooling water to recover the waste heat of the waste gas, and the gas after cooling enters the rest of the waste gas treatment system for treatment.

[0004] Since the water temperature in the water tank becomes higher and higher after being heated by the waste heat of the waste gas, the cooling effect of the water in the water tank on the waste gas of the electric furnace gradually becomes worse, affecting the heat recovery efficiency of the electric furnace. Content of the Utility Model

[0005] In order to overcome the deficiencies of the prior art, the purpose of the utility model is to provide an energy-saving electric furnace to improve the heat recovery efficiency of the electric furnace.

[0006] The technical solution adopted by the utility model is as follows:

[0007] An energy-saving electric furnace includes an electric furnace body. A first gas outlet pipe and a water tank are arranged on the side of the electric furnace body. A heat exchange pipe is arranged in the water tank. A second gas outlet pipe is arranged on the side wall of the water tank. The gas outlet end of the first gas outlet pipe is communicated with the gas inlet end of the heat exchange pipe. The outer wall of the heat exchange pipe is in contact with the liquid in the water tank. The gas outlet end of the heat exchange pipe is arranged at the bottom of the water tank. The waste gas enters the heat exchange pipe through the first gas outlet pipe and then is discharged from the water tank through the second gas outlet pipe. A liquid inlet pipe is arranged at the top of the water tank, and a liquid outlet pipe is arranged at the bottom of the water tank. A first electromagnetic valve and a second electromagnetic valve are respectively arranged on the liquid inlet pipe and the liquid outlet pipe. A temperature sensor is arranged in the water tank, and a control system is arranged outside the water tank. The temperature sensor, the first electromagnetic valve and the second electromagnetic valve are respectively electrically connected with the control system. The temperature sensor controls the opening or closing of the two electromagnetic valves through the control system.

[0008] During the operation of the electric furnace, the waste gas generated is heat-exchanged with the liquid in the water tank through the heat exchange pipe and then discharged from the water tank. The temperature sensor monitors the liquid temperature in the water tank. When the liquid temperature exceeds the maximum threshold, the control system opens the first electromagnetic valve and the second electromagnetic valve, and cold water enters the water tank through the liquid inlet pipe, and the liquid in the water tank is discharged from the water tank through the liquid outlet pipe; when the liquid temperature is lower than the minimum threshold, the control system closes the first electromagnetic valve and the second electromagnetic valve, so that the waste gas and the liquid in the water tank can fully perform heat exchange, improving the heat recovery efficiency of the electric furnace.

[0009] Optionally, a blower is provided on the outer side of the water tank. The air suction end of the blower is connected to the air outlet end of the first air outlet pipe, and the air outlet end of the blower is connected to the air inlet end of the heat exchange pipe.

[0010] Optionally, the heat exchange pipe is arranged in a serpentine bend in the liquid of the water tank.

[0011] The serpentine bend arrangement of the heat exchange pipe improves the heat exchange between the outer wall of the heat exchange pipe and the liquid in the water tank, thereby improving the heat recovery efficiency of the electric furnace.

[0012] Optionally, the air outlet end of the heat exchange pipe is arranged vertically downward at the bottom of the water tank.

[0013] The waste gas flows out through the air outlet end of the heat exchange pipe and rises through the liquid to the top of the water tank, and is discharged from the water tank through the second air outlet pipe. After the waste gas leaves the heat exchange pipe, it further exchanges heat with the liquid in the water tank, improving the heat recovery efficiency of the electric furnace.

[0014] Optionally, one end of the liquid inlet pipe is connected to a faucet, the other end of the liquid inlet pipe extends to the water tank and is communicated with the water tank, one end of the liquid outlet pipe extends to the water tank and is communicated with the water tank, and the other end of the liquid outlet pipe extends into the liquid storage tank.

[0015] Cold water enters the water tank through the liquid inlet pipe, and the heated water flows out of the water tank through the liquid outlet pipe and is stored in the liquid storage tank, improving the fluidity of the liquid in the water tank and further improving the heat recovery efficiency of the electric furnace.

[0016] Optionally, the temperature sensor detects the temperature of the liquid in the water tank. When the liquid temperature exceeds the set maximum threshold, the control system controls the first solenoid valve and the second solenoid valve to open, and cold water enters the water tank through the liquid inlet pipe, and hot water enters the liquid storage tank through the liquid outlet pipe for storage; when the liquid temperature is lower than the set minimum threshold, the control system controls the first solenoid valve and the second solenoid valve to close.

[0017] Controlling the opening or closing of the first solenoid valve and the second solenoid valve through the temperature sensor facilitates the adjustment of the temperature of the liquid in the water tank and improves the heat recovery efficiency of the electric furnace.

[0018] Optionally, multiple water tanks are provided, and the multiple water tanks are communicated with each other through the first air outlet pipe.

[0019] The waste gas is cooled by passing through multiple water tanks, further improving the heat recovery efficiency of the electric furnace.

[0020] The beneficial effects of the present utility model are as follows: The waste gas generated during the operation of the electric furnace is discharged from the water tank after heat exchange with the liquid in the water tank through the heat exchange pipe. The temperature sensor monitors the liquid temperature in the water tank. When the liquid temperature exceeds the maximum threshold, the control system opens the first solenoid valve and the second solenoid valve, and cold water enters the water tank through the liquid inlet pipe. The liquid in the water tank is discharged from the water tank through the liquid outlet pipe; when the liquid temperature is lower than the minimum threshold, the control system closes the first solenoid valve and the second solenoid valve, enabling the waste gas to fully exchange heat with the liquid in the water tank, thereby improving the heat recovery efficiency of the electric furnace. Description of the Drawings

[0021] Figure 1 It is a schematic diagram of the overall structure of the present utility model.

[0022] The reference numerals in the figure correspond to the names as follows: 1, electric furnace body; 2, first gas outlet pipe; 3, water tank; 4, heat exchange pipe; 5, second gas outlet pipe; 6, liquid inlet pipe; 61, first solenoid valve; 7, liquid outlet pipe; 71, second solenoid valve; 8, fan; 9, liquid storage tank. Detailed Embodiments

[0023] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0024] Please refer to Figure 1 , the present utility model provides a technical solution:

[0025] An energy-saving electric furnace includes an electric furnace body 1. A first gas outlet pipe 2 and a water tank 3 are arranged on the side of the electric furnace body 1. A heat exchange pipe 4 is arranged in the water tank 3. The outside of the water tank 3 is detachably connected with a fan 8 through a locking bolt. The air suction end of the fan 8 is fixedly connected to the air outlet end of the first gas outlet pipe 2. The air outlet end of the fan 8 is fixedly connected to the air inlet end of the heat exchange pipe 4. The air inlet end of the first gas outlet pipe 2 is connected to the electric furnace. The air outlet end of the first gas outlet pipe 2 is fixedly connected and communicated with the air inlet end of the heat exchange pipe 4. The outer wall of the heat exchange pipe 4 is in contact with the liquid in the water tank 3. The heat exchange pipe 4 is serpentinely bent and extends downward in the liquid of the water tank 3. The air outlet end of the heat exchange pipe 4 is vertically downward at the bottom of the water tank 3.

[0026] In order to improve the heat recovery efficiency of the circuit, a plurality of water tanks 3 are provided. The plurality of water tanks 3 are evenly spaced in a direction away from the electric furnace body 1. Adjacent two water tanks 3 are communicated through a second air outlet pipe 5. The two ends of the second air outlet pipe 5 are respectively fixedly connected to the side walls of the two adjacent water tanks 3. The waste gas enters the heat exchange tube 4 through the first air outlet pipe 2 and then is discharged from the water tank 3 through the second air outlet pipe 5 and enters the heat exchange tube 4 in the adjacent water tank 3 for heat exchange. A liquid inlet pipe 6 is provided at the top of the water tank 3, and a liquid outlet pipe 7 is provided at the bottom of the water tank 3. One end of the liquid inlet pipe 6 is detachably connected to a water faucet, and the other end of the liquid inlet pipe 6 is fixedly connected to the top of the water tank 3 and communicated with the water tank 3. One end of the liquid outlet pipe 7 is fixedly connected to the bottom of the water tank 3 and communicated, and the other end of the liquid outlet pipe 7 extends into the liquid storage tank 9.

[0027] A first solenoid valve 61 and a second solenoid valve 71 are respectively provided on the liquid inlet pipe 6 and the liquid outlet pipe 7. A temperature sensor is provided inside the water tank 3, and a control system is provided outside the water tank 3. The temperature sensor, the first solenoid valve 61 and the second solenoid valve 71 are respectively electrically connected to the control system. The temperature sensor controls the opening or closing of the two solenoid valves through the control system.

[0028] The temperature sensor detects the liquid temperature inside the water tank 3. When the liquid temperature exceeds the set maximum threshold, the control system controls the first solenoid valve 61 and the second solenoid valve 71 to open, and cold water enters the water tank 3 through the liquid inlet pipe 6, and hot water enters the liquid storage tank 9 for storage through the liquid outlet pipe 7; when the liquid temperature is lower than the set minimum threshold, the control system controls the first solenoid valve 61 and the second solenoid valve 71 to close.

[0029] Finally, it should be noted that the above are only preferred examples of the present invention and are not used to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An energy-saving electric furnace, comprising an electric furnace body (1), characterized in that: A first air outlet pipe (2) and a water tank (3) are arranged on the side of the electric furnace body (1), a heat exchange pipe (4) is arranged in the water tank (3), and a second air outlet pipe (5) is arranged on the side wall of the water tank (3). The air outlet end of the first air outlet pipe (2) is connected to the air inlet end of the heat exchange pipe (4), the outer wall of the heat exchange pipe (4) is in contact with the liquid in the water tank (3), and the air outlet end of the heat exchange pipe (4) is arranged at the bottom of the water tank (3). The exhaust gas enters the heat exchange pipe (4) through the first air outlet pipe (2) and is then discharged from the water tank (3) through the second air outlet pipe (5). 3), a liquid inlet pipe (6) is arranged at the top of the water tank (3), a liquid outlet pipe (7) is arranged at the bottom of the water tank (3), a first solenoid valve (61) and a second solenoid valve (71) are arranged on the liquid inlet pipe (6) and the liquid outlet pipe (7), respectively, a temperature sensor is arranged inside the water tank (3), a control system is arranged outside the water tank (3), the temperature sensor, the first solenoid valve (61) and the second solenoid valve (71) are respectively electrically connected to the control system, and the temperature sensor controls the two solenoid valves to open or close through the control system.

2. An energy-saving electric furnace according to claim 1, characterized in that: A fan (8) is arranged outside the water tank (3), the air suction end of the fan (8) is connected to the air outlet end of the first air outlet pipe (2), and the air outlet end of the fan (8) is connected to the air inlet end of the heat exchange pipe (4).

3. An energy-saving electric furnace according to claim 1, characterized in that: The heat exchange tube (4) is arranged in a serpentine shape in the liquid of the water tank (3).

4. The energy-saving electric furnace according to claim 1, characterized in that: The air outlet end of the heat exchange tube (4) is arranged vertically downward at the bottom of the water tank (3).

5. The energy-saving electric furnace according to claim 1, characterized in that: One end of the liquid inlet pipe (6) is connected to the faucet, the other end of the liquid inlet pipe (6) extends to the water tank (3) and is in communication with the water tank (3), one end of the liquid outlet pipe (7) extends to the water tank (3) and is in communication with the water tank (3), and the other end of the liquid outlet pipe (7) extends into the liquid storage tank (9).

6. The energy-saving electric furnace according to claim 1, characterized in that: The temperature sensor detects the temperature of the liquid in the water tank (3). When the temperature of the liquid exceeds a set maximum threshold, the control system controls the first solenoid valve (61) and the second solenoid valve (71) to open, and cold water enters the water tank (3) through the liquid inlet pipe (6), and hot water enters the liquid storage tank (9) for storage through the liquid outlet pipe (7); when the temperature of the liquid is lower than a set minimum threshold, the control system controls the first solenoid valve (61) and the second solenoid valve (71) to close.

7. The energy-saving electric furnace according to claim 1, characterized in that: A plurality of water tanks (3) are provided, and the plurality of water tanks (3) are connected to each other via a second air outlet pipe (5).

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