Multi-channel smoke exhaust structure of aluminum melting furnace

Abstract

According to the multi-channel smoke exhaust structure of the aluminum melting furnace, the situation that untreated smoke escapes from the bottom of the smoke exhaust hood to pollute the environment is avoided to a certain extent, and mutual interference is reduced when two smoke treatment devices suck smoke. The multi-channel smoke exhaust structure of the aluminum melting furnace comprises a first smoke exhaust hood, a first smoke exhaust pipe and first smoke treatment equipment, the top of the first smoke exhaust hood is connected with the rear end of the first smoke exhaust pipe, the front end of the first smoke exhaust pipe is connected with the first smoke treatment equipment, and a first stop valve is installed in the first smoke exhaust pipe; comprising a second smoke exhaust hood, a second smoke exhaust pipe and second smoke treatment equipment, the top of the second smoke exhaust hood is connected with the rear end of the second smoke exhaust pipe, the front end of the second smoke exhaust pipe is connected with the second smoke treatment equipment, a second stop valve is installed in the second smoke exhaust pipe, and a communicating pipe is arranged between the first smoke exhaust pipe and the second smoke exhaust pipe. The two ends of the communicating pipe are connected with the first smoke exhaust pipe and the second smoke exhaust pipe respectively, a flow control valve is installed in the communicating pipe, and the flow control valve is opened to different degrees so as to control the flow of the communicating pipe.

Description

Technical Field

[0001] The utility model relates to the field of aluminum melting furnaces, in particular to a smoke exhaust structure of an aluminum melting furnace. Background Art

[0002] The existing smoke exhaust structure of an aluminum melting furnace is as Figure 1 shown. A first smoke exhaust hood 6 is arranged above a first aluminum melting furnace 7. A first smoke exhaust pipe 10 is arranged at the top of the first smoke exhaust hood 6 and is connected to the rear end thereof. The front end of the first smoke exhaust pipe 10 is connected to a first flue gas treatment device 1, and a first stop valve 3 is installed in the first smoke exhaust pipe 10. The working process is as follows. The operator opens the first stop valve 3 and the first flue gas treatment device 1, and then opens the first aluminum melting furnace 7. The first aluminum melting furnace 7 melts aluminum. During the aluminum melting process, flue gas is generated. The flue gas is sucked by the first smoke exhaust hood 6 and then sent into the first flue gas treatment device 1 through the smoke exhaust pipe, and then is purified by the first flue gas treatment device 1. Correspondingly, the second aluminum melting furnace 9 also has corresponding equipment, and the working principle is the same, so it will not be elaborated here. As can be seen from the above, the flue gas treatment devices are in one-to-one correspondence with the aluminum melting furnaces, and theoretically can just meet the smoke exhaust requirements of the aluminum melting furnaces. However, sometimes, due to the instantaneous smoke exhaust volume of the aluminum melting furnace being greater than the treatment efficiency of the flue gas treatment device, the flue gas generated by the aluminum melting furnace cannot be treated in time by the flue gas treatment device, and these untreated flue gases may escape from the bottom of the smoke exhaust hood to pollute the environment. Summary of the Utility Model

[0003] Through non-disclosed research by the inventor, a connecting pipe 13 is arranged between the first smoke exhaust pipe 10 and the second smoke exhaust pipe 11. If the instantaneous smoke exhaust volume of the first aluminum melting furnace 7 is too large and exceeds the load of the first flue gas treatment device 1, the flue gas will enter the second smoke exhaust pipe 11 through the connecting pipe 13 and then enter the second flue gas treatment device 2 to be purified. However, this has created a new problem: the two flue gas treatment devices are connected by the connecting pipe 13. Each of these two flue gas treatment devices sucks flue gas, and both will suck flue gas from the connecting pipe 13, but the suction directions are opposite, resulting in mutual interference and waste of suction.

[0004] The utility model aims to provide a multi-path smoke exhaust structure for an aluminum melting furnace, which can, to a certain extent, prevent untreated flue gas from escaping from the bottom of the smoke exhaust hood to pollute the environment, and can, to a certain extent, reduce the mutual interference between the two flue gas treatment devices when sucking flue gas.

[0005] Multi-channel smoke exhaust structure for aluminum melting furnace, including a first smoke exhaust hood, a first smoke exhaust pipe and a first flue gas treatment device. The top of the first smoke exhaust hood is connected to the rear end of the first smoke exhaust pipe, and the front end of the first smoke exhaust pipe is connected to the first flue gas treatment device. A first stop valve is installed in the first smoke exhaust pipe; it includes a second smoke exhaust hood, a second smoke exhaust pipe and a second flue gas treatment device. The top of the second smoke exhaust hood is connected to the rear end of the second smoke exhaust pipe, and the front end of the second smoke exhaust pipe is connected to the second flue gas treatment device. A second stop valve is installed in the second smoke exhaust pipe. A connecting pipe is provided between the first smoke exhaust pipe and the second smoke exhaust pipe. Both ends of the connecting pipe are respectively connected to the first smoke exhaust pipe and the second smoke exhaust pipe. A flow control valve is installed in the connecting pipe, and the flow control valve opens to different degrees by itself to control the flow of the connecting pipe.

[0006] Further, two electric check valves are respectively installed in the first smoke exhaust hood and the second smoke exhaust hood; it includes a controller, and the controller is respectively connected to the two electric check valves and the first and second stop valves.

[0007] Further, a first aluminum melting furnace is provided below the first smoke exhaust hood, and a second aluminum melting furnace is provided below the second smoke exhaust hood.

[0008] Further, one end of the connecting pipe is specifically connected to the pipe section on the first smoke exhaust pipe behind the first stop valve, and the other end of the connecting pipe is specifically connected to the pipe section on the second smoke exhaust pipe in front of the second stop valve.

[0009] The beneficial effects are as follows: When the first aluminum melting furnace and the second aluminum melting furnace work simultaneously, the flow control valve only opens slightly to make the flow in the connecting pipe small, and the flow in the smoke exhaust pipe is much larger than that in the connecting pipe. Therefore, under normal conditions, the flue gas generated by the two aluminum melting furnaces is sucked into the corresponding two flue gas treatment devices through the corresponding smoke exhaust hoods and smoke exhaust pipes, and only a small amount of flue gas enters the connecting pipe and is simultaneously sucked by the two flue gas treatment devices. Therefore, the interference between the two flue gas treatment devices is small, and waste of suction is avoided to a certain extent. If the instantaneous smoke exhaust volume of one of the aluminum melting furnaces is greater than the treatment efficiency of the corresponding flue gas treatment device, most of the untreated flue gas will enter the connecting pipe and then be sucked away and purified by the other flue gas treatment device, and the amount of flue gas overflowing from the smoke exhaust hood will decrease accordingly. Therefore, the emission of untreated flue gas from the bottom of the smoke exhaust hood to pollute the environment is avoided to a certain extent. Description of the Drawings

[0010] Figure 1 is a schematic structural diagram of the existing smoke exhaust structure of the aluminum melting furnace;

[0011] Figure 2 is a schematic structural diagram of the multi-channel smoke exhaust structure of the aluminum melting furnace of the present invention;

[0012] In the figure: 1. First flue gas treatment equipment; 2. Second flue gas treatment equipment; 3. First stop valve; 4. Flow control valve; 5. Second stop valve; 6. First smoke exhaust hood; 7. First aluminum melting furnace; 8. Second smoke exhaust hood; 9. Second aluminum melting furnace; 10. First smoke exhaust pipe; 11. Second smoke exhaust pipe; 13. Connecting pipe. Detailed implementation mode

[0013] The following further elaborates on the present utility model in detail in conjunction with the specific implementation mode.

[0014] As Figure 2 shown, the multi-pass smoke exhaust structure of the aluminum melting furnace includes a first aluminum melting furnace 7 and a first flue gas treatment equipment 1. A first smoke exhaust hood 6 is provided above the first aluminum melting furnace 7. A first smoke exhaust pipe 10 is provided between the first smoke exhaust hood 6 and the first flue gas treatment equipment 1. The rear end of the first smoke exhaust pipe 10 is connected to the top of the first smoke exhaust hood 6, and the front end is connected to the first flue gas treatment equipment 1. A first stop valve 3 is installed in the first smoke exhaust pipe 10. The multi-pass smoke exhaust structure of the aluminum melting furnace includes a second smoke exhaust hood 8 and a second flue gas treatment equipment 2. A second smoke exhaust hood 8 is provided above the second smoke exhaust hood 8. A second smoke exhaust pipe 11 is provided between the second smoke exhaust hood 8 and the second flue gas treatment equipment 2. The rear end of the second smoke exhaust pipe 11 is connected to the top of the second smoke exhaust hood 8, and the front end is connected to the second flue gas treatment equipment 2. A second stop valve 5 is installed in the second smoke exhaust pipe 11. A connecting pipe 13 is provided between the first smoke exhaust pipe 10 and the second smoke exhaust pipe 11. One end of the connecting pipe 13 is connected to the pipe section of the first smoke exhaust pipe 10 behind the first stop valve 3, and the other end of the connecting pipe 13 is connected to the pipe section of the second smoke exhaust pipe 11 in front of the second stop valve 5. A flow control valve 4 is installed in the connecting pipe 13, and the flow control valve 4 is opened to different degrees to control the flow of the connecting pipe 13. The working process is described in detail below.

[0015] If only one aluminum melting furnace needs to be started, the second flue gas treatment equipment 2 is uniformly started to purify the flue gas, and the first flue gas treatment equipment 1 is only used as a backup. Specifically: if only the first aluminum melting furnace 7 is started, the first and second stop valves 3 and 5 are closed, the first flue gas treatment equipment 1 is closed, the flow control valve 4 is opened to the fully open state, and the second flue gas treatment equipment 2 is opened. The flue gas generated by the first aluminum melting furnace 7 will enter the second flue gas treatment equipment 2 through the connecting pipe 13 and be purified; if only the second aluminum melting furnace 9 is started, the second stop valve 5 and the flow control valve 4 are closed, the first flue gas treatment equipment 1 is closed, the second flue gas treatment equipment 2 is opened, and the flue gas generated by the second aluminum melting furnace 9 will enter the second flue gas treatment equipment 2 through the second smoke exhaust pipe 11 and be purified.

[0016] If it is necessary to start two aluminum melting furnaces simultaneously, it is necessary to start the first and second flue gas treatment devices 1 and 2 simultaneously, and then open the flow control valve 4 to a half-open state. Under normal conditions, the flue gas generated by the two aluminum melting furnaces is inhaled into the corresponding two flue gas treatment devices through the corresponding exhaust hoods and exhaust pipes, and only a small amount of flue gas enters the connecting pipe 13 and is simultaneously sucked by the two flue gas treatment devices. If the instantaneous exhaust gas volume of one of the aluminum melting furnaces is greater than the treatment efficiency of the corresponding flue gas treatment device, most of the untreated flue gas will enter the connecting pipe 13 and then be sucked away and purified by the other flue gas treatment device to prevent the flue gas from overflowing through the exhaust hood to a certain extent. Further, two electric check valves are respectively installed in the first exhaust hood 6 and the second exhaust hood 8; including a controller, the controller is respectively connected to the two electric check valves and the first and second stop valves 3 and 5. When the first and second stop valves 3 and 5 are opened simultaneously, it will feedback to the controller, and this state means that the two aluminum melting furnaces will start simultaneously, and the controller controls the two electric check valves to start to prevent the flue gas from overflowing through the exhaust hood. The controller can also be connected to the flow control valve 4. The controller judges which aluminum melting furnace is working according to the opening and closing conditions of the flow control valve 4, the first and second stop valves 3 and 5, and then controls the corresponding electric check valve to open.

[0017] As described above, it is only the implementation mode of the present utility model creation, and does not limit the patent protection scope with this. Those skilled in the art make non-substantive changes or substitutions based on the present utility model creation, and still fall within the patent protection scope.

Claims

1. Multi-channel smoke exhaust structure for aluminum melting furnace, including a first smoke exhaust hood, a first smoke exhaust pipe and a first flue gas treatment device. The top of the first smoke exhaust hood is connected to the rear end of the first smoke exhaust pipe, the front end of the first smoke exhaust pipe is connected to the first flue gas treatment device, and a first stop valve is installed in the first smoke exhaust pipe; including a second smoke exhaust hood, a second smoke exhaust pipe and a second flue gas treatment device. The top of the second smoke exhaust hood is connected to the rear end of the second smoke exhaust pipe, the front end of the second smoke exhaust pipe is connected to the second flue gas treatment device, and a second stop valve is installed in the second smoke exhaust pipe, characterized in that: A connecting pipe is provided between the first exhaust pipe and the second exhaust pipe. The two ends of the connecting pipe are respectively connected to the first exhaust pipe and the second exhaust pipe, and a flow control valve is installed inside the connecting pipe. The flow control valve opens to different degrees by itself to control the flow rate of the connecting pipe.

2. The multi-channel smoke exhaust structure of the aluminum melting furnace according to claim 1, wherein: Two electric check valves are respectively installed inside the first exhaust hood and the second exhaust hood; It includes a controller, and the controller is respectively connected to the two electric check valves and the first and second stop valves.

3. The multi-path smoke exhaust structure of the molten aluminum furnace according to claim 1, characterized in that: A first aluminum melting furnace is provided below the first exhaust hood, and a second aluminum melting furnace is provided below the second exhaust hood.

4. The multi-path smoke exhaust structure of the aluminum melting furnace according to claim 1, wherein: One end of the connecting pipe is specifically connected to the pipe section of the first exhaust pipe behind the first stop valve, and the other end of the connecting pipe is specifically connected to the pipe section of the second exhaust pipe in front of the second stop valve.

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