Recyclable tail gas treatment device for ferrosilicon furnace

Abstract

The utility model relates to the field of tail gas treatment, and discloses a recoverable tail gas treatment device for a silicon iron furnace, which comprises a silicon iron furnace body, an exhaust pipe is fixedly communicated with one side of the silicon iron furnace body, a waste heat boiler is fixedly communicated with one end of the exhaust pipe, and a conveying pipe is fixedly communicated with one side of the waste heat boiler. One end of the conveying pipe is fixedly communicated with a primary bag-type dust collector, one side of the primary bag-type dust collector is fixedly communicated with a connecting pipe, one end of the connecting pipe is fixedly communicated with a desulfurizing tower, one side of the desulfurizing tower is fixedly communicated with a communicating pipe, one end of the communicating pipe is fixedly communicated with a secondary bag-type dust collector, and the other end of the communicating pipe is fixedly communicated with a secondary bag-type dust collector. And one side of the secondary bag-type dust collector is communicated and fixed with an air delivery pipe. According to the utility model, the waste gas enters the denitration system, nitrogen oxides in the flue gas are efficiently treated, the problem that denitration cannot be realized due to blockage of a catalyst in the prior art is solved, and the aims of purifying the waste gas and recycling resources can be fulfilled.

Description

Technical Field

[0001] The utility model relates to the technical field of tail gas treatment, in particular to a recoverable tail gas treatment device for a ferrosilicon furnace. Background Art

[0002] Ferrosilicon furnace is an industrial electric furnace with high power consumption, which belongs to a kind of ore-fired furnace. Ferrosilicon furnace consists of furnace shell, furnace cover, furnace lining, short net, water cooling system, smoke exhaust system, dust removal system, electrode shell, electrode pressing and lifting system, loading and unloading system, gripper, burn-through device, hydraulic system, transformer and various electrical equipment, etc., and the refractory materials used are also quite demanding.

[0003] In the exhaust gas treatment devices currently used in conjunction with ferrosilicon furnaces, the exhaust gas is not treated thoroughly, and a large number of harmful impurities will remain in it, which will not only endanger the health and safety of people around, but also affect the quality of the surrounding environment. In addition, traditional exhaust gas treatment devices cannot recycle the residual materials in the waste gas, which will cause more waste of resources. Utility Model Content

[0004] The purpose of the utility model is to provide a recyclable exhaust gas treatment device for a ferrosilicon furnace to solve the problem that the exhaust gas treatment is not thorough, and a large number of harmful impurities will remain therein, which will not only endanger the health and safety of the surrounding personnel, but also affect the quality of the surrounding environment, and the traditional exhaust gas treatment device cannot recycle the residual materials in the waste flue gas.

[0005] In order to achieve the above-mentioned purpose of the utility model, the utility model adopts the following technical scheme: a recyclable exhaust gas treatment device for a ferrosilicon furnace, comprising a ferrosilicon furnace body, one side of the ferrosilicon furnace body is connected and fixed with an exhaust pipe, one end of the exhaust pipe is connected and fixed with a waste heat boiler, one side of the waste heat boiler is connected and fixed with a delivery pipe, one end of the delivery pipe is connected and fixed with a first-level bag collector, one side of the first-level bag collector is connected and fixed with a connecting pipe, one end of the connecting pipe is connected and fixed with a desulfurization tower, one side of the desulfurization tower is connected and fixed with a connecting pipe, one end of the connecting pipe is connected and fixed with a second-level bag collector, and one side of the second-level bag collector is connected and fixed with a gas delivery pipe.

[0006] Preferably, one end of the gas transmission pipe is connected to and fixed with a denitration reactor, and the bottom surface of the denitration reactor is connected to and fixed with a first discharge pipe.

[0007] Preferably, one end of the first exhaust pipe is connected to and fixed with an induced draft fan, one side of the induced draft fan is connected to and fixed with a second exhaust pipe, and one end of the second exhaust pipe is connected to and fixed with a chimney.

[0008] Preferably, two receiving bins are connected and fixed on the bottom surface of the first-stage bag filter.

[0009] Preferably, a recovery pipe is connected and fixed to the bottom end of the receiving bin, and a recovery box is connected and fixed to one end of the recovery pipe.

[0010] Preferably, a filter plate is fixed to the top of the chimney.

[0011] Compared with the prior art, the recoverable tail gas treatment device for ferrosilicon furnace using the above technical solution has the following beneficial effects:

[0012] 1. During use, the exhaust gas generated by the ferrosilicon furnace body is sent into the exhaust pipe and transported to the waste heat boiler for secondary combustion. Through this step, the heat energy in the exhaust gas is fully utilized. The exhaust gas after combustion enters the first-level bag filter through the conveying pipe, where the microsilicon powder is collected to achieve material recycling. Subsequently, the exhaust gas is transported to the desulfurization tower through the connecting pipe. The desulfurization tower absorbs and decomposes the sulfide in the exhaust gas, and ensures that there is no wastewater discharge by setting up a dry desulfurization system. After being processed by the desulfurization tower, the exhaust gas enters the secondary bag filter to ensure that the dust and sulfur dioxide content in the flue gas is low. Finally, the exhaust gas enters the denitrification system, which efficiently treats the nitrogen oxides in the flue gas, solving the problem of the inability to denitrify due to catalyst blockage in the past, and can also achieve the goals of exhaust gas purification and resource recycling;

[0013] 2. During use, the denitration reactor can promote the conversion of nitrogen oxides in the waste flue gas, thereby making the waste flue gas cleaner. The induced draft fan can increase air flow, so that the purified air can flow quickly and flow out of the chimney, thereby greatly reducing the white smoke emission time and improving the emission efficiency;

[0014] 3. During use, the receiving bin can receive the microsilica powder in the exhaust gas, avoiding the spread and causing environmental pollution. The remaining microsilica powder can be transported to the recovery box through the recovery pipe to facilitate subsequent centralized recovery and treatment. The exhaust gas can be filtered again through the filter plate, making the exhaust gas cleaner, thus protecting the environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is an overall side view of the embodiment.

[0016] In the figure: 1. Silicon iron furnace body; 2. Exhaust pipe; 3. Waste heat boiler; 4. Delivery pipe; 5. Primary bag filter; 6. Connecting pipe; 7. Desulfurization tower; 8. Connecting pipe; 9. Secondary bag filter; 10. Gas pipe; 11. Denitrification reactor; 12. First discharge pipe; 13. Induced draft fan; 14. Second discharge pipe; 15. Chimney; 16. Receiving bin; 17. Recovery pipe; 18. Recovery box; 19. Filter plate. DETAILED DESCRIPTION

[0017] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings.

[0018] like Figure 1 As shown, a recoverable tail gas treatment device for a ferrosilicon furnace comprises a ferrosilicon furnace body 1, one side of the ferrosilicon furnace body 1 is connected and fixed with an exhaust pipe 2, one end of the exhaust pipe 2 is connected and fixed with a waste heat boiler 3, one side of the waste heat boiler 3 is connected and fixed with a delivery pipe 4, one end of the delivery pipe 4 is connected and fixed with a first-level bag-type dust collector 5, the first-level bag-type dust collector 5 is an existing structure and will not be described in detail here, one side of the first-level bag-type dust collector 5 is connected and fixed with a connecting pipe 6, one end of the connecting pipe 6 is connected and fixed with a desulfurization tower 7, the desulfurization tower 7 is an existing structure and will not be described in detail here, one side of the desulfurization tower 7 is connected and fixed with a connecting pipe 8, one end of the connecting pipe 8 is connected and fixed with a second-level bag-type dust collector 9, the second-level bag-type dust collector 9 is an existing structure and will not be described in detail here, one side of the second-level bag-type dust collector 9 is connected and fixed with a gas delivery pipe 10.

[0019] During use, the exhaust gas generated by the ferrosilicon furnace body 1 is sent to the exhaust pipe 2 and transported to the waste heat boiler 3 for secondary combustion. Through this step, the heat energy in the exhaust gas is fully utilized. The exhaust gas after combustion enters the primary bag filter 5 through the conveying pipe 4, where the microsilicon powder is collected to achieve material recycling. Subsequently, the exhaust gas is transported to the desulfurization tower 7 through the connecting pipe 6. The desulfurization tower 7 absorbs and decomposes the sulfide in the exhaust gas, and ensures that there is no wastewater discharge by setting up a dry desulfurization system. After being treated by the desulfurization tower 7, the exhaust gas enters the secondary bag filter 9 to ensure that the dust and sulfur dioxide content in the flue gas is low. Finally, the exhaust gas enters the denitrification system, which efficiently treats the nitrogen oxides in the flue gas, solves the problem of the inability to denitrify due to catalyst blockage in the past, and can also achieve the goals of exhaust gas purification and resource recycling.

[0020] like Figure 1 As shown, one end of the gas transmission pipe 10 is connected and fixed with a denitration reactor 11, which is an existing structure and will not be described in detail here. The bottom surface of the denitration reactor 11 is connected and fixed with a first discharge pipe 12, and one end of the first discharge pipe 12 is connected and fixed with an induced draft fan 13, which is an existing structure and will not be described in detail here. One side of the induced draft fan 13 is connected and fixed with a second discharge pipe 14, and one end of the second discharge pipe 14 is connected and fixed with a chimney 15, which is an existing structure and will not be described in detail here. The bottom surface of the first-stage bag dust collector 5 is connected and fixed with two receiving bins 16, and the bottom end of the receiving bin 16 is connected and fixed with a recovery pipe 17, and one end of the recovery pipe 17 is connected and fixed with a recovery box 18. A filter plate 19 is fixed on the top of the chimney 15, and the filter plate 19 is made of activated carbon.

[0021] During use, the denitration reactor 11 can promote the conversion of nitrogen oxides in the exhaust gas, thereby making the exhaust gas cleaner. The induced draft fan 13 can increase the air flow, so that the purified air can flow quickly and flow out of the chimney 15, thereby greatly reducing the white smoke emission time and improving the emission efficiency. The microsilicon powder in the exhaust gas can be received by the receiving bin 16 to avoid spreading and causing environmental pollution. The remaining microsilicon powder can be transported to the recovery box 18 through the recovery pipe 17 to facilitate subsequent centralized recovery and processing. The exhaust gas can be filtered again by the filter plate 19, thereby making the exhaust gas cleaner, thereby protecting the environment.

[0022] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A recyclable tail gas treatment device for a ferrosilicon furnace, comprising a ferrosilicon furnace body (1), It is characterized in that An exhaust pipe (2) is connected and fixed to one side of the ferrosilicon furnace body (1), one end of the exhaust pipe (2) is connected and fixed to a waste heat boiler (3), one side of the waste heat boiler (3) is connected and fixed to a delivery pipe (4), one end of the delivery pipe (4) is connected and fixed to a primary bag filter (5), one side of the primary bag filter (5) is connected and fixed to a connecting pipe (6), one end of the connecting pipe (6) is connected and fixed to a desulfurization tower (7), one side of the desulfurization tower (7) is connected and fixed to a connecting pipe (8), one end of the connecting pipe (8) is connected and fixed to a secondary bag filter (9), and one side of the secondary bag filter (9) is connected and fixed to a gas delivery pipe (10).

2. The recoverable tail gas treatment device for ferrosilicon furnace according to claim 1, Features: One end of the gas delivery pipe (10) is connected to and fixed with a denitration reactor (11), and the bottom surface of the denitration reactor (11) is connected to and fixed with a first discharge pipe (12).

3. The recoverable tail gas treatment device for ferrosilicon furnace according to claim 2, Features: One end of the first discharge pipe (12) is connected to and fixed with an induced draft fan (13), one side of the induced draft fan (13) is connected to and fixed with a second discharge pipe (14), and one end of the second discharge pipe (14) is connected to and fixed with a chimney (15).

4. The recoverable tail gas treatment device for ferrosilicon furnace according to claim 1, Features: Two receiving bins (16) are connected and fixed on the bottom surface of the primary bag filter (5).

5. The recoverable tail gas treatment device for ferrosilicon furnace according to claim 4, Features: The bottom end of the receiving bin (16) is connected to and fixed with a recovery pipe (17), and one end of the recovery pipe (17) is connected to and fixed with a recovery box (18).

6. The recoverable tail gas treatment device for ferrosilicon furnace according to claim 3, Features: A filter plate (19) is fixed to the top of the chimney (15).

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