Switchable wet dust removal structure and method for iron and steel slag treatment

Abstract

The application provides a switchable wet dust removal structure and method for iron and steel slag treatment, which comprises a casting residue treatment area, a desulfurization slag treatment area, a first wet dust removal device, a second wet dust removal device and a dust removal pipeline; the dust removal pipeline comprises a first dust removal pipe, a second dust removal pipe, a third dust removal pipe, a fourth dust removal pipe and a fifth dust removal pipe; one end of the first dust removal pipe is communicated with the casting residue treatment area, one end of the second dust removal pipe is communicated with the desulfurization slag treatment area, one end of the fourth dust removal pipe is communicated with the second wet dust removal device, one end of the fifth dust removal pipe is communicated with the first wet dust removal device, and the other end of the fifth dust removal pipe is communicated with the third dust removal pipe; a first flue valve is arranged in the fifth dust removal pipe, a second flue valve is arranged in the fourth dust removal pipe, and a third flue valve is arranged in the third dust removal pipe. By switching the flue valves, the corresponding wet dust removal devices of the two areas are switched, so that the dust removal work of the two areas can be smoothly carried out, and the production efficiency is improved.

Description

Technical Field

[0001] This invention relates to the field of wet dust removal technology, specifically to a switchable wet dust removal structure and method for treating iron and steel slag. Background Technology

[0002] Currently, the large amount of flue gas generated during the iron and steel slag processing needs to be dusted before it can be discharged. In existing technologies, the working areas for iron and steel slag processing include a casting residue treatment area and a desulfurization slag treatment area. The dust removal pipelines and wet dust removal devices for these two areas are set up separately, and the generated flue gas is treated separately. When one wet dust removal device malfunctions or requires scheduled maintenance, the dust removal work in its corresponding area needs to be stopped, delaying the work process and affecting efficiency. Summary of the Invention

[0003] To address the shortcomings of existing technologies, the purpose of this invention is to provide a switchable wet dust removal structure and method for treating iron and steel slag. This method allows for switching between wet dust removal devices corresponding to the casting residue treatment area and the desulfurization slag treatment area, ensuring smooth dust removal operations in both areas and improving production efficiency.

[0004] The present invention provides a switchable wet dust removal structure for the treatment of iron and steel slag, including a casting residue treatment area, a desulfurization slag treatment area, a first wet dust removal device, a second wet dust removal device, and a dust removal pipeline;

[0005] The dust removal pipeline includes a first dust removal pipe, a second dust removal pipe, a third dust removal pipe, a fourth dust removal pipe, and a fifth dust removal pipe; one end of the first dust removal pipe is connected to the casting residue treatment area, and the other end is connected to the third dust removal pipe; one end of the second dust removal pipe is connected to the desulfurization slag treatment area, and the other end is connected to the third dust removal pipe; one end of the fourth dust removal pipe is connected to the second wet dust removal device, and the other end is connected to the third dust removal pipe; one end of the fifth dust removal pipe is connected to the first wet dust removal device, and the other end is connected to the third dust removal pipe.

[0006] A first flue valve is installed inside the fifth dust removal pipe, a second flue valve is installed inside the fourth dust removal pipe, and a third flue valve is installed inside the third dust removal pipe. The third flue valve is located between the fourth dust removal pipe and the fifth dust removal pipe.

[0007] Furthermore, the slag treatment area includes a slag treatment device and a first collection hood, wherein the slag treatment device is connected to the first dust removal pipe through the first collection hood.

[0008] Furthermore, the desulfurization slag treatment area includes a desulfurization slag treatment device and a second collection hood, wherein the desulfurization slag treatment device is connected to the second dust removal pipe through the second collection hood.

[0009] Furthermore, the device is characterized by including an exhaust device, which is connected to both the first wet dust removal device and the second wet dust removal device.

[0010] This invention also provides a switchable wet dust removal method for treating iron and steel slag, comprising:

[0011] Under normal operating conditions, the third flue valve installed in the third dust removal pipe is normally closed, while the first flue valve installed in the fifth dust removal pipe and the second flue valve installed in the fourth dust removal pipe are normally open. The flue gas generated in the casting residue treatment area enters the second wet dust removal device for dust removal treatment through the first dust removal pipe, the third dust removal pipe and the fourth dust removal pipe in sequence. The flue gas generated in the desulfurization slag treatment area enters the first wet dust removal device for dust removal treatment through the second dust removal pipe, the third dust removal pipe and the fifth dust removal pipe in sequence.

[0012] If the first wet dust removal device cannot operate, the first flue valve is closed, and the second and third flue valves are opened. The flue gas generated in the casting residue treatment area enters the second wet dust removal device for dust removal through the first dust removal pipe, the third dust removal pipe, and the fourth dust removal pipe in sequence. The flue gas generated in the desulfurization slag treatment area enters the second wet dust removal device for dust removal through the second dust removal pipe, the third dust removal pipe, and the fourth dust removal pipe in sequence.

[0013] If the second wet dust removal device is unable to operate, the second flue valve is closed, and the first flue valve and the third flue valve are opened. The flue gas generated in the casting residue treatment area enters the first wet dust removal device for dust removal treatment through the first dust removal pipe, the third dust removal pipe and the fifth dust removal pipe in sequence. The flue gas generated in the desulfurization slag treatment area enters the first wet dust removal device for dust removal treatment through the second dust removal pipe, the third dust removal pipe and the fifth dust removal pipe in sequence.

[0014] Furthermore, in the slag treatment area, the flue gas generated by the slag treatment device enters the first dust collection pipe through the first collection hood.

[0015] Furthermore, in the desulfurization slag treatment area, the flue gas generated by the desulfurization slag treatment device enters the second dust removal pipe through the second collection hood.

[0016] Furthermore, the characteristic feature is that the flue gas in the first wet dust removal device and the second wet dust removal device is discharged through the exhaust device after dust removal treatment.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] This invention provides a switchable wet dust removal structure and method for treating iron and steel slag. The switchable wet dust removal structure for iron and steel slag treatment includes a first flue valve, a second flue valve, and a third flue valve within the dust removal pipeline. The third flue valve is located in a fifth dust removal pipe connected to the first wet dust removal device, and the second flue valve is located in a fourth dust removal pipe connected to the second wet dust removal device. The first flue valve is located in a third dust removal pipe connected to the first, second, fourth, and fifth dust removal pipes, and is positioned between the fourth and fifth dust removal pipes. By switching the flue valves, the wet dust removal devices corresponding to the casting residue treatment area and the desulfurization slag treatment area can be switched, ensuring smooth dust removal operations in both areas. This avoids situations where a malfunction or maintenance of one wet dust removal device prevents dust removal operations in its corresponding area, thus affecting overall dust removal efficiency and improving production efficiency. Attached Figure Description

[0019] Other features, objects, and advantages of the present invention will become more apparent from the following detailed description of non-limiting embodiments with reference to the accompanying drawings:

[0020] Figure 1 This is a schematic diagram of a switchable wet dust removal structure for treating iron and steel slag, provided by an embodiment of the present invention.

[0021] Figure 2 This is a schematic diagram of the structure of a casting residue treatment area provided in an embodiment of the present invention;

[0022] Figure 3 This is a schematic diagram of the structure of a desulfurization slag treatment area provided in an embodiment of the present invention;

[0023] Figure 4 This is a schematic diagram of a dust removal pipeline provided in an embodiment of the present invention.

[0024] In the picture:

[0025] 1. Foundry slag treatment area; 101. Foundry slag treatment device; 102. First collection hood;

[0026] 2. Desulfurization slag treatment area; 201. Desulfurization slag treatment device; 202. Second collection hood;

[0027] 3. First wet dust removal device;

[0028] 4. Second wet dust removal device;

[0029] 5. Exhaust system;

[0030] 6. Second flue valve;

[0031] 7. Third flue valve;

[0032] 8. First flue valve;

[0033] 9. Dust removal pipes; 901. First dust removal pipe; 902. Second dust removal pipe; 903. Third dust removal pipe; 904. Fourth dust removal pipe; 905. Fifth dust removal pipe. Detailed Implementation

[0034] The present invention will now be described in detail with reference to specific embodiments. These embodiments will help those skilled in the art to further understand the present invention, but do not limit the invention in any way. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all fall within the protection scope of the present invention.

[0035] Please see Figure 1-4 This application provides a switchable wet dust removal structure for the treatment of iron and steel slag, including a casting residue treatment area 1, a desulfurization slag treatment area 2, a first wet dust removal device 3, a second wet dust removal device 4, an exhaust device 5, and a dust removal pipeline 9.

[0036] The slag treatment area 1 includes a slag treatment device 101 and a first collection hood 102. The slag treatment device 101 is connected to the first dust removal pipe 901 through the first collection hood 102. Optionally, the slag treatment device 101 includes a slag tank, a first spray pipe, and a first water injection system. One end of the first spray pipe is connected to the first collection hood 102, and the other end is connected to the first water injection system. The first water injection system includes a first water tank, a first water pump, and a first water injection pipe. One end of the first water injection pipe is connected to the first spray pipe, and the other end is connected to the first water pump. The first water pump is connected to the first water tank. The first water pump transmits water from the first water tank to the first spray pipe through the first water injection pipe. Optionally, the first water injection system is also equipped with a first electromagnetic flow meter and a first electric regulating valve to control the water volume and flow rate sprayed from the first spray pipe. Flue gas is generated during the process of the water sprayed from the first spray pipe cooling the slag in the slag tank.

[0037] The desulfurization slag treatment area 2 includes a desulfurization slag treatment device 201 and a second collection hood 202. The desulfurization slag treatment device 201 is connected to the second dust removal pipe 902 through the second collection hood 202. Optionally, the desulfurization slag treatment device 201 includes a desulfurization slag tank, a second spray pipe, and a second water injection system. One end of the second spray pipe is connected to the second collection hood 202, and the other end is connected to the second water injection system. The second water injection system includes a second water tank, a second water pump, and a second water injection pipe. One end of the second water injection pipe is connected to the second spray pipe, and the other end is connected to the second water pump. The second water pump is connected to the second water tank. The second water pump transmits water from the second water tank to the second spray pipe through the second water injection pipe. Optionally, the second water injection system is also equipped with a second electromagnetic flow meter and a second electric regulating valve to control the water volume and flow rate sprayed from the second spray pipe. Flue gas is generated during the process of the water sprayed from the second spray pipe cooling the desulfurization slag in the desulfurization slag tank.

[0038] The exhaust device 5 is connected to the first wet dust removal device 3 and the second wet dust removal device 4 respectively; optionally, the exhaust device 5 is an exhaust stack.

[0039] The dust removal pipe 9 includes a first dust removal pipe 901, a second dust removal pipe 902, a third dust removal pipe 903, a fourth dust removal pipe 904, and a fifth dust removal pipe 905; one end of the first dust removal pipe 901 is connected to the casting residue treatment area 1, and the other end is connected to the third dust removal pipe 903; one end of the second dust removal pipe 902 is connected to the desulfurization slag treatment area 2, and the other end is connected to the third dust removal pipe 903; one end of the fourth dust removal pipe 904 is connected to the second wet dust removal device 4, and the other end is connected to the third dust removal pipe 903; one end of the fifth dust removal pipe 905 is connected to the first wet dust removal device 3, and the other end is connected to the third dust removal pipe 903.

[0040] A first flue valve 8 is installed in the fifth dust removal pipe 905, a second flue valve 6 is installed in the fourth dust removal pipe 904, and a third flue valve 7 is installed in the third dust removal pipe 903. The third flue valve 7 is located between the fourth dust removal pipe 904 and the fifth dust removal pipe 905.

[0041] In an optional embodiment, the switchable wet dust removal structure for treating iron and steel slag further includes a control device electrically connected to the first flue valve 8, the second flue valve 6, and the third flue valve 7, respectively, for controlling the opening and closing of the first flue valve 8, the second flue valve 6, and the third flue valve 7; optionally, the control device can be a valve controller.

[0042] In this embodiment, by switching the flue valves, the wet dust removal devices corresponding to the casting residue treatment area 1 and the desulfurization slag treatment area 2 are switched to ensure that the dust removal work in the two areas proceeds smoothly. This avoids the situation where the corresponding area cannot carry out dust removal operations due to the failure or maintenance of one wet dust removal device, which would affect the overall dust removal efficiency and thus improve production efficiency.

[0043] Please see Figure 1-4 This application also provides a switchable wet dust removal method for treating iron and steel slag, comprising:

[0044] Under normal operating conditions, the valve controller controls the third flue valve 7 installed in the third dust removal pipe 903 to be normally closed, and the first flue valve 8 installed in the fifth dust removal pipe 905 and the second flue valve 6 installed in the fourth dust removal pipe 904 to be normally open. The flue gas generated by the casting residue treatment device 101 in the casting residue treatment area 1 enters the second wet dust removal device 4 for dust removal treatment through the first collection hood 102, the first dust removal pipe 901, the third dust removal pipe 903 and the fourth dust removal pipe 904 in sequence. The flue gas generated in the desulfurization slag treatment area 2 enters the first wet dust removal device 3 for dust removal through the second collection hood 202, the second dust removal pipe 902, the third dust removal pipe 903 and the fifth dust removal pipe 905 in sequence. The flue gas after being treated by the first wet dust removal device 3 and the second wet dust removal device 4 is discharged through the exhaust device 5.

[0045] When the first wet dust removal device 3 is unable to operate, the first flue valve 8 is closed by the valve controller, and the second flue valve 6 and the third flue valve 7 are opened. The flue gas generated in the casting residue treatment area 1 enters the second wet dust removal device 4 for dust removal treatment through the first collection hood 102, the first dust removal pipe 901, the third dust removal pipe 903 and the fourth dust removal pipe 904 in sequence. The flue gas generated in the desulfurization slag treatment area 2 enters the second wet dust removal device 4 for dust removal treatment through the second collection hood 202, the second dust removal pipe 902, the third dust removal pipe 903 and the fourth dust removal pipe 904 in sequence. The flue gas treated by the second wet dust removal device 4 is discharged through the exhaust device 5.

[0046] When the second wet dust removal device 4 is unable to operate, the second flue valve 6 is closed by the valve controller, and the first flue valve 8 and the third flue valve 7 are opened. The flue gas generated in the casting residue treatment area 1 enters the first wet dust removal device 3 for dust removal treatment through the first collection hood 102, the first dust removal pipe 901, the third dust removal pipe 903 and the fifth dust removal pipe 905 in sequence. The flue gas generated in the desulfurization slag treatment area 2 enters the first wet dust removal device 3 for dust removal treatment through the second collection hood 202, the second dust removal pipe 902, the third dust removal pipe 903 and the fifth dust removal pipe 905 in sequence. The flue gas treated by the first wet dust removal device 3 is discharged through the exhaust device 5.

[0047] In this embodiment, by controlling the opening and closing of the flue valve, the wet dust removal devices corresponding to the casting residue treatment area 1 and the desulfurization slag treatment area 2 are switched to ensure that the dust removal work in the two areas proceeds smoothly. This avoids the situation where the corresponding area cannot carry out dust removal operations due to the failure or maintenance of one wet dust removal device, which would affect the overall dust removal efficiency and thus improve production efficiency.

[0048] Specific embodiments of the present invention have been described above. It should be understood that the present invention is not limited to the specific embodiments described above, and those skilled in the art can make various changes or modifications within the scope of the claims, which do not affect the essence of the present invention. Unless otherwise specified, the embodiments and features described in this application can be arbitrarily combined with each other.

Claims

1. A switchable wet dust removal structure for treating iron and steel slag, characterized in that, It includes a casting residue treatment area (1), a desulfurization slag treatment area (2), a first wet dust removal device (3), a second wet dust removal device (4), and a dust removal pipeline (9). The dust removal pipe (9) includes a first dust removal pipe (901), a second dust removal pipe (902), a third dust removal pipe (903), a fourth dust removal pipe (904), and a fifth dust removal pipe (905); one end of the first dust removal pipe (901) is connected to the casting residue treatment area (1), and the other end is connected to the third dust removal pipe (903); one end of the second dust removal pipe (902) is connected to the desulfurization slag treatment area (2), and the other end is connected to the third dust removal pipe (903); one end of the fourth dust removal pipe (904) is connected to the second wet dust removal device (4), and the other end is connected to the third dust removal pipe (903); one end of the fifth dust removal pipe (905) is connected to the first wet dust removal device (3), and the other end is connected to the third dust removal pipe (903); The fifth dust removal pipe (905) is provided with a first flue valve (8), the fourth dust removal pipe (904) is provided with a second flue valve (6), and the third dust removal pipe (903) is provided with a third flue valve (7). The third flue valve (7) is located between the fourth dust removal pipe (904) and the fifth dust removal pipe (905).

2. The switchable wet dust removal structure for treating iron and steel slag according to claim 1, characterized in that, The slag treatment area (1) includes a slag treatment device (101) and a first collection hood (102). The slag treatment device (101) is connected to the first dust removal pipe (901) through the first collection hood (102).

3. The switchable wet dust removal structure for treating iron and steel slag according to claim 1, characterized in that, The desulfurization slag treatment area (2) includes a desulfurization slag treatment device (201) and a second collection hood (202). The desulfurization slag treatment device (201) is connected to the second dust removal pipe (902) through the second collection hood (202).

4. The switchable wet dust removal structure for treating iron and steel slag according to any one of claims 1 to 3, characterized in that, It also includes an exhaust device (5), which is connected to the first wet dust removal device (3) and the second wet dust removal device (4) respectively.

5. A switchable wet dust removal method for treating iron and steel slag, applied to the switchable wet dust removal structure for treating iron and steel slag as described in any one of claims 1 to 4, characterized in that, include: Under normal operating conditions, the third flue valve (7) installed in the third dust removal pipe (903) is normally closed, the first flue valve (8) installed in the fifth dust removal pipe (905) and the second flue valve (6) installed in the fourth dust removal pipe (904) are normally open. The flue gas generated in the casting residue treatment area (1) passes through the first dust removal pipe (901), the third dust removal pipe (903) and the fourth dust removal pipe (904) in sequence and enters the second wet dust removal device (4) for dust removal treatment. The flue gas generated in the desulfurization slag treatment area (2) passes through the second dust removal pipe (902), the third dust removal pipe (903) and the fifth dust removal pipe (905) in sequence and enters the first wet dust removal device (3) for dust removal treatment. When the first wet dust removal device (3) cannot operate, the first flue valve (8) is closed, and the second flue valve (6) and the third flue valve (7) are opened. The flue gas generated in the casting residue treatment area (1) enters the second wet dust removal device (4) for dust removal treatment through the first dust removal pipe (901), the third dust removal pipe (903) and the fourth dust removal pipe (904) in sequence. The flue gas generated in the desulfurization slag treatment area (2) enters the second wet dust removal device (4) for dust removal treatment through the second dust removal pipe (902), the third dust removal pipe (903) and the fourth dust removal pipe (904) in sequence. When the second wet dust removal device (4) is unable to operate, the second flue valve (6) is closed, and the first flue valve (8) and the third flue valve (7) are opened. The flue gas generated in the casting residue treatment area (1) enters the first wet dust removal device (3) for dust removal treatment through the first dust removal pipe (901), the third dust removal pipe (903) and the fifth dust removal pipe (905) in sequence. The flue gas generated in the desulfurization slag treatment area (2) enters the first wet dust removal device (3) for dust removal treatment through the second dust removal pipe (902), the third dust removal pipe (903) and the fifth dust removal pipe (905) in sequence.

6. The switchable wet dust removal method for treating iron and steel slag according to claim 5, characterized in that, In the slag treatment area (1), the flue gas generated by the slag treatment device (101) enters the first dust removal pipe (901) through the first collection hood (102).

7. The switchable wet dust removal method for treating iron and steel slag according to claim 5, characterized in that, In the desulfurization slag treatment area (2), the flue gas generated by the desulfurization slag treatment device (201) enters the second dust removal pipe (902) through the second collection hood (202).

8. The switchable wet dust removal method for treating iron and steel slag according to any one of claims 5 to 7, characterized in that, After the flue gas in the first wet dust removal device (3) and the second wet dust removal device (4) is treated by dust removal, it is discharged through the exhaust device (5).

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