An environmentally friendly blast furnace tail gas treatment device

Abstract

This utility model discloses an environmentally friendly blast furnace tail gas treatment device, belonging to the technical field of tail gas treatment devices. This environmentally friendly blast furnace tail gas treatment device includes a filtration mechanism, which comprises a purification box. A distribution plate is fixedly installed at the top of the purification box. A filter box is slidably installed at the bottom of the distribution plate inside the purification box. A first activated carbon filter layer is fixedly installed at the upper part of the filter box, and a second activated carbon filter layer is installed at the bottom of the first activated carbon filter layer. A HEPA filter is installed at the bottom of the second activated carbon filter layer. An air inlet pipe and a backflush pipe are respectively installed at the top of the purification box. Baffles are fixedly installed above both the second activated carbon filter layer and the HEPA filter inside the filter box. This utility model can effectively improve the practicality of blast furnace tail gas treatment devices and has high practical value.

Description

Technical Field

[0001] This utility model relates to the technical field of exhaust gas treatment devices, specifically an environmentally friendly blast furnace exhaust gas treatment device. Background Technology

[0002] Blast furnaces produce a large amount of exhaust gas during the smelting process. This exhaust gas contains harmful substances such as dust, sulfur dioxide, and nitrogen oxides. If it is directly released into the atmosphere, it will seriously pollute the environment and endanger human health.

[0003] Existing blast furnace exhaust gas treatment devices mostly focus on dust removal and spraying as the core processes: first, dust is removed by equipment such as bag filters and electrostatic precipitators to reduce particulate matter emission concentration, and then alkaline solutions are sprayed through spray towers to neutralize acidic gases such as sulfur dioxide. However, this type of process has limited effectiveness in treating residual nitrogen oxides, carbon monoxide, and other components in the exhaust gas, resulting in the risk of exceeding emission standards and making it difficult to meet increasingly stringent environmental protection standards.

[0004] Therefore, in view of this, we will study and improve the existing structure and its shortcomings to provide an environmentally friendly blast furnace tail gas treatment device, in order to achieve a more practical value. Utility Model Content

[0005] In order to overcome the shortcomings of the prior art, this utility model provides an environmentally friendly blast furnace tail gas treatment device.

[0006] The technical solution adopted by this utility model is: an environmentally friendly blast furnace tail gas treatment device, including a filtration mechanism, wherein the filtration mechanism includes a purification box, a distribution plate is fixedly installed at the top of the purification box, a filter box is slidably installed at the bottom of the distribution plate inside the purification box, a first activated carbon filter layer is fixedly installed at the upper end of the filter box, a second activated carbon filter layer is installed at the bottom of the first activated carbon filter layer, a HEPA filter screen is installed at the bottom of the second activated carbon filter layer, an air inlet pipe and a backflush pipe are respectively installed at the top of the purification box, and baffles are fixedly installed at the top of the second activated carbon filter layer and the HEPA filter screen inside the filter box.

[0007] Furthermore, it also includes a cyclone dust collector and a spray tower, wherein the output end of the cyclone dust collector is connected to the bottom input end of the spray tower via a pipe.

[0008] The beneficial effect of adopting the above-mentioned further scheme is that the cyclone dust collector first performs preliminary dust removal on the blast furnace tail gas to remove large particulate impurities, and then further purifies it through the spray tower, reducing the processing load of the subsequent filtration mechanism and improving the overall tail gas treatment efficiency.

[0009] Furthermore, a first solenoid valve is fitted onto the upper end of the air inlet pipe, and a first connecting pipe is fitted onto the other end of the first solenoid valve. One end of the first connecting pipe is connected to the output end of the spray tower.

[0010] The beneficial effect of adopting the above-mentioned further solution is that the first solenoid valve controls the opening and closing of the first connecting pipe, regulates the flow rate of the exhaust gas after treatment by the spray tower into the purification box, and facilitates the adjustment of the treatment rhythm according to the exhaust gas concentration to ensure stable purification effect.

[0011] Furthermore, a second solenoid valve is fitted at the top of the backflush pipe, and a second connecting pipe is fitted at the other end of the second solenoid valve. One end of the second connecting pipe is connected to the bottom side of the spray tower.

[0012] The beneficial effect of adopting the above-mentioned further solution is that the second solenoid valve controls the connection between the second connecting pipe and the backflush pipe. When air is introduced into the air inlet pipe, the second solenoid valve is closed. When the centrifugal fan blows air back into the purification box, the second solenoid valve is opened and the first solenoid valve is closed, so that the impurities in the filter box re-enter the spray tower through the second connecting pipe for further purification.

[0013] Furthermore, an exhaust pipe is installed on the bottom side of the purification box, and an electromagnetic three-way valve is fitted at one end of the exhaust pipe.

[0014] The beneficial effect of adopting the above-mentioned further solution is that the exhaust pipe discharges purified gas, and the electromagnetic three-way valve can switch the exhaust path.

[0015] Furthermore, the filtration mechanism also includes a centrifugal fan, the output end of which is connected to one end of a solenoid three-way valve via a pipe.

[0016] The beneficial effect of adopting the above-mentioned further solution is that the centrifugal fan can periodically blow gas into the purification box through the electromagnetic three-way valve to backflush the filter box, thereby preventing impurities from clogging the first activated carbon filter layer, the second activated carbon filter layer, and the HEPA filter, which would affect the purification efficiency.

[0017] Furthermore, a sealed door is hinged to one side of the purification box via a pair of hinges, and a handle is fixedly installed on one side of the sealed door.

[0018] The advantages of adopting the above-mentioned further solution are that the sealed door can be easily opened and closed with hinges and handles, making it easy to remove the filter box to replace or clean the filter layer, simplifying operation and improving the convenience of equipment maintenance.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows: In the purification box of the filtration mechanism of this environmentally friendly blast furnace tail gas treatment device, the even distribution plate ensures that the tail gas enters the filtration box evenly. The first activated carbon filter layer, the second activated carbon filter layer, and the HEPA filter screen filter harmful substances in the tail gas in stages. The baffle plate extends the tail gas filtration path and improves the purification effect. The inlet pipe introduces the tail gas, and the backflush pipe can be used to discharge the impurities attached to the first activated carbon filter layer, the second activated carbon filter layer, and the HEPA filter screen, so that they can re-enter the spray tower for spraying again, improving the treatment effect of the tail gas. The whole device achieves efficient purification treatment of blast furnace tail gas, which meets environmental protection requirements. The second solenoid valve controls the connection between the second connecting pipe and the backflush pipe. When the inlet pipe is inlet, the second solenoid valve is closed. When the centrifugal fan blows air back into the purification box, the second solenoid valve is opened and the first solenoid valve is closed, so that the impurities in the filter box re-enter the spray tower for purification again through the second connecting pipe. Attached Figure Description

[0020] Figure 1 Schematic diagram of the three-dimensional structure of the environmentally friendly blast furnace tail gas treatment device provided by this utility model Figure 1 ; Figure 2 Schematic diagram of the three-dimensional structure of the environmentally friendly blast furnace tail gas treatment device provided by this utility model Figure 2 ; Figure 3 Schematic diagram of the three-dimensional structure of the environmentally friendly blast furnace tail gas treatment device provided by this utility model Figure 3 ; Figure 4 A partial front cross-sectional view of the purification box of the environmentally friendly blast furnace tail gas treatment device provided by this utility model; Figure 5 The environmentally friendly blast furnace tail gas treatment device provided by this utility model Figure 2 An enlarged schematic diagram of the A structure.

[0021] In the diagram: 1. Cyclone dust collector; 2. Spray tower; 3. Filtration mechanism; 301. Purification box; 303. Filter box; 304. Distribution plate; 305. Inlet pipe; 306. First solenoid valve; 307. Second connecting pipe; 308. Second solenoid valve; 309. Backflush pipe; 310. First connecting pipe; 311. Exhaust pipe; 312. First activated carbon filter layer; 313. Second activated carbon filter layer; 314. HEPA filter; 315. Baffle plate; 316. Solenoid three-way valve; 317. Centrifugal fan; 302. Sealing door. Detailed Implementation

[0022] To better understand the technical solution of this utility model, the following description, in conjunction with the accompanying drawings, further illustrates this utility model.

[0023] Please see Figure 1 - Figure 5 This utility model provides a technical solution: an environmentally friendly blast furnace tail gas treatment device, including a filtration mechanism 3. The filtration mechanism 3 includes a purification box 301. A distribution plate 304 is fixedly installed at the top of the purification box 301. A filter box 303 is slidably installed at the bottom of the distribution plate 304 inside the purification box 301. A first activated carbon filter layer 312 is fixedly installed at the upper end of the filter box 303. A second activated carbon filter layer 313 is installed at the bottom end of the first activated carbon filter layer 312. A HEPA filter 314 is installed at the bottom end of the second activated carbon filter layer 313. An air inlet pipe 305 and a backflush pipe 309 are respectively installed at the top of the purification box 301. The filter box 303 is located between the second activated carbon filter layer 313 and the bottom end of the filter box 303. Each HEPA filter 314 has a baffle plate 315 fixedly installed at its upper end. Inside the purification box 301 of the filtration mechanism 3, the distribution plate 304 ensures that the exhaust gas enters the filter box 303 evenly. The first activated carbon filter layer 312, the second activated carbon filter layer 313, and the HEPA filter 314 filter harmful substances in the exhaust gas in stages. The baffle plate 315 extends the exhaust gas filtration path and improves the purification effect. The inlet pipe 305 introduces the exhaust gas, and the backflush pipe 309 can be used to discharge the impurities attached to the first activated carbon filter layer 312, the second activated carbon filter layer 313, and the HEPA filter 314, so that they can re-enter the spray tower 2 for spraying again, thereby improving the treatment effect of the exhaust gas. The overall process achieves efficient purification treatment of blast furnace exhaust gas, which meets environmental protection requirements.

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0025] Please see Figure 1 - Figure 5It also includes a cyclone dust collector 1 and a spray tower 2. The output end of the cyclone dust collector 1 is connected to the bottom input end of the spray tower 2 through a pipe. A first solenoid valve 306 is fitted on the upper end of the air inlet pipe 305. A first connecting pipe 310 is fitted on the other end of the first solenoid valve 306. One end of the first connecting pipe 310 is connected to the output end of the spray tower 2. A second solenoid valve 308 is fitted on the top end of the backflush pipe 309. A second connecting pipe 307 is fitted on the other end of the second solenoid valve 308. One end of the second connecting pipe 307 is connected to the bottom of the spray tower 2. The bottom of the purification box 301 is equipped with... The system is equipped with an exhaust pipe 311, one end of which is fitted with an electromagnetic three-way valve 316. The filter mechanism 3 also includes a centrifugal fan 317, the output end of which is connected to one end of the electromagnetic three-way valve 316 via a pipe. A sealing door 302 is hinged to one side of the purification box 301 via a pair of hinges, and a handle is fixedly installed on one side of the sealing door 302. The cyclone dust collector 1 first performs preliminary dust removal on the blast furnace tail gas to remove large particulate impurities, and then further purifies it through the spray tower 2, reducing the processing load of the subsequent filter mechanism 3 and improving the overall tail gas treatment efficiency. Valve 306 controls the opening and closing of the first connecting pipe 310, regulating the flow rate of the exhaust gas treated by the spray tower 2 into the purification box 301. This allows for adjustment of the treatment rhythm based on the exhaust gas concentration, ensuring stable purification results. The second solenoid valve 308 controls the connection between the second connecting pipe 307 and the backflush pipe 309. When air is introduced through the inlet pipe 305, the second solenoid valve 308 closes. When the centrifugal fan 317 backflushes the purification box 301, the second solenoid valve 308 opens and the first solenoid valve 306 closes, allowing impurities in the filter box 303 to re-enter through the second connecting pipe 307. The gas is purified again in the spray tower 2, and the purified gas is discharged through the exhaust pipe 311. The electromagnetic three-way valve 316 can switch the exhaust path. The centrifugal fan 317 can blow the gas into the purification box 301 at regular intervals through the electromagnetic three-way valve 316 to backflush the filter box 303, so as to avoid the clogging of the first activated carbon filter layer 312, the second activated carbon filter layer 313 and the HEPA filter screen 314 by impurities, which would affect the purification efficiency. The sealing door 302 can be opened and closed conveniently through the hinge and handle, making it easy to take out the filter box 303 to replace or clean the filter layer. The operation is simple and improves the convenience of equipment maintenance.

[0026] Specifically, the working principle of this environmentally friendly blast furnace tail gas treatment device is as follows: During use, the blast furnace tail gas first passes through a cyclone dust collector 1 to remove large particulate impurities, and then enters a spray tower 2 for further purification. The purified tail gas passes through a first connecting pipe 310 and an inlet pipe 305, and is controlled by a first solenoid valve 306 to enter a purification chamber 301. A distribution plate 304 ensures that the tail gas enters the filter chamber 303 evenly, and is filtered sequentially through a first activated carbon filter layer 312, a second activated carbon filter layer 313, and a HEPA filter 314. A baffle plate 315 extends the filtration path and improves the effect. The purified gas is discharged through an exhaust pipe 311 and a solenoid three-way valve 316. When backflushing is required, a centrifugal fan 317 blows air into the purification chamber 301 through the solenoid three-way valve 316. The first solenoid valve 306 closes and the second solenoid valve 308 opens. Impurities flow back to the spray tower 2 for reprocessing through a backflushing pipe 309 and a second connecting pipe 307. A sealing door 302 facilitates the replacement of filter layers. The whole process achieves multi-stage purification and circulation treatment of the tail gas.

[0027] The above description is only a preferred embodiment of the present utility model. Therefore, all equivalent changes or modifications made to the structure, features and principles described in the claims of the present utility model patent application are included in the scope of the present utility model patent application.

Claims

1. An environmentally friendly blast furnace tail gas treatment device, characterized in that, The filter includes a filtration mechanism (3), which includes a purification box (301). A distribution plate (304) is fixedly installed at the top of the purification box (301). A filter box (303) is slidably installed at the bottom of the distribution plate (304) inside the purification box (301). A first activated carbon filter layer (312) is fixedly installed at the upper end of the filter box (303). A second activated carbon filter layer (313) is installed at the bottom end of the first activated carbon filter layer (312). A HEPA filter (314) is installed at the bottom end of the second activated carbon filter layer (313). An air inlet pipe (305) and a backflush pipe (309) are respectively installed at the top of the purification box (301). Baffles (315) are fixedly installed at the top of the second activated carbon filter layer (313) and the HEPA filter (314) inside the filter box (303).

2. The environment-friendly blast furnace tail gas treatment device according to claim 1, characterized in that, It also includes a cyclone dust collector (1) and a spray tower (2), the output end of which is connected to the bottom input end of the spray tower (2) via a pipe.

3. The environmentally friendly blast furnace tail gas treatment device according to claim 1, characterized in that, The upper end of the air inlet pipe (305) is fitted with a first solenoid valve (306), and the other end of the first solenoid valve (306) is fitted with a first connecting pipe (310). One end of the first connecting pipe (310) is connected to the output end of the spray tower (2).

4. The environmentally friendly blast furnace tail gas treatment device according to claim 1, characterized in that, The top end of the backflush pipe (309) is fitted with a second solenoid valve (308), and the other end of the second solenoid valve (308) is fitted with a second connecting pipe (307). One end of the second connecting pipe (307) is connected to the bottom side of the spray tower (2).

5. The environmentally friendly blast furnace tail gas treatment device according to claim 1, characterized in that, An exhaust pipe (311) is installed on the bottom side of the purification box (301), and an electromagnetic three-way valve (316) is fitted at one end of the exhaust pipe (311).

6. The environmentally friendly blast furnace tail gas treatment device according to claim 5, characterized in that, The filtration mechanism (3) also includes a centrifugal fan (317), the output end of which is connected to one end of a solenoid three-way valve (316) via a pipe.

7. The environmentally friendly blast furnace tail gas treatment device according to claim 1, characterized in that, A sealed door (302) is hinged to one side of the purification box (301) via a pair of hinges, and a handle is fixedly installed on one side of the sealed door (302).

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