Flue gas purification mechanism and steelmaking furnace

Abstract

The utility model relates to the technical field of flue gas purification, in particular to a flue gas purification mechanism and a steelmaking furnace, which comprise a flue gas purification component, the flue gas purification component is sequentially provided with a first purification box, a second purification box and a drying filter box from left to right, and guide pipes are arranged on the left end surfaces of the first purification box and the second purification box; according to the flue gas purification mechanism and the steelmaking furnace, under the cooperation of the first purification box and the second purification box, flue gas extracted and conveyed by the exhaust fan is firstly absorbed and filtered through a cuprous chloride solution in the first purification box, then an aqueous solution is sprayed through a spraying pipe in the second purification box, and then the flue gas is purified through the cuprous chloride solution in the second purification box. The two pieces of filter cotton are matched to adsorb dust particles and metal particles in flue gas, meanwhile, the sprayed water solution cools the flue gas, finally, the flue gas is guided into the drying filter box through the air inlet pipe, the flue gas is filtered through the two pieces of filter cotton, the situation that atomized water is discharged and pollutes the surrounding environment is reduced, and then the flue gas is intensively discharged and collected through the exhaust pipe.

Description

Technical Field

[0001] This utility model relates to the field of flue gas purification technology, specifically to a flue gas purification mechanism and a steelmaking furnace. Background Technology

[0002] Steelmaking furnaces generate a large amount of flue gas containing high concentrations of pollutants during the smelting process, which needs to be purified to reduce the impact of pollution on the surrounding environment.

[0003] The utility model CN213253780U discloses a harmless treatment device for flue gas from a steelmaking converter, including a steelmaking furnace, a first flue, a high-temperature component, a first fixed frame, a cooling and dust removal component, a high-temperature tank, a cooling and dust removal tank, a water storage tank, a second flue, a second fixed frame, a third fixed frame, and a cap. The high-temperature component consists of a heating rod, an inner tank, an oxygen inlet, and a first flue. The cooling and dust removal component consists of a cooling and dust removal tank, a water storage tank, a second flue, a spray nozzle, a water pipe, a filter screen, a slag discharge port, a pipeline, a water pump, a movable plate, an exhaust pipe, and an exhaust fan. The top of the steelmaking furnace is fixedly connected to one end of the first flue, and the other end of the first flue is connected to the center of the top of the high-temperature tank. The side of the high-temperature tank is connected to one end of the second flue, and the other end of the second flue is connected to the side of the cooling and dust removal component.

[0004] The above-mentioned technical solution is convenient for removing harmful gases, beneficial for purifying smoke and dust in the gas, and conducive to environmental protection; however, the combustion of carbon monoxide through high-temperature components is incomplete, resulting in insufficient reaction and failure to remove carbon monoxide from the flue gas. Furthermore, the dust particles in the flue gas are not easily filtered and intercepted to reduce the pollution impact of emissions on the surrounding environment. Summary of the Invention

[0005] The purpose of this invention is to provide a flue gas purification mechanism and a steelmaking furnace to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A flue gas purification mechanism includes a flue gas purification component. The flue gas purification component is provided with a first purification box, a second purification box, and a drying filter box from left to right. The left end face of the first purification box and the second purification box are provided with guide pipes, and the right end of the guide pipes is provided with a one-way valve near the bottom.

[0008] The first purification chamber is equipped with a first sealing cover on the top, a first observation window on the front face of the first purification chamber, a cuprous chloride solution inside the first purification chamber, and an exhaust fan located in the middle of the guide pipe near the left side of the first purification chamber.

[0009] The second purification box is provided with a second sealing cover on the top and a second observation window on the front face of the second purification box. A conveying pipe is provided inside the second purification box near the top. The end of the conveying pipe extends into the interior and is provided with a spray pipe. Several nozzles are provided on the spray pipe. Positioning frames are provided on both the upper and lower sides of the spray pipe inside the second purification box. A limiting plate is provided in the middle of the positioning frame. Filter cotton is provided on the limiting plate.

[0010] The drying filter box is installed above the support plate on the right end face of the second purification box. The drying filter box is symmetrically equipped with drying cotton inside. The top of the drying filter box is equipped with a top cover. The left end face of the drying filter box is connected to the inside of the second purification box through the air inlet pipe passing through the second sealing cover. The right end face of the drying filter box is equipped with an exhaust pipe near the top.

[0011] Furthermore, the first observation window is made of tempered glass, and the outer walls of the first observation window are bonded and fixed to the side walls of the first purification box. A first discharge pipe is provided near the bottom of the front face of the first purification box, and an inlet pipe is provided near the top of the front face of the first purification box. Both the first discharge pipe and the inlet pipe are provided with sealing plugs at their ends.

[0012] In this invention, the first observation window allows external personnel to easily observe the content of the cuprous chloride solution inside. The inlet pipe facilitates the replenishment of the corresponding cuprous chloride solution, and the first discharge pipe facilitates the discharge and replacement of the internal cuprous chloride solution. The cuprous chloride solution absorbs carbon monoxide in the flue gas, preventing carbon monoxide from being discharged and polluting the surrounding air. The corresponding sealing plug can be opened to facilitate the replenishment of the internal cuprous chloride solution or the discharge and replacement of the internal solution.

[0013] Specifically, a rubber pad is provided on the lower surface of the first sealing cover, the first sealing cover is fixedly connected to the top of the first purification box with screws, one of the guide tubes is welded and fixed to the right end of the first purification box, and the exhaust fan is fixedly connected to the guide tube with screws.

[0014] In this invention, the first sealing cover, in conjunction with the rubber gasket, increases the sealing of the top of the first purification box, and the exhaust fan helps to extract the corresponding flue gas and deliver it into the first purification box.

[0015] One-way valves are installed on the guide pipes to prevent backflow of liquid solution at the right end of the guide pipe from affecting the flue gas treatment process.

[0016] It should be noted that the second observation window is made of tempered glass. The second observation window is bonded and fixed to the side wall of the second purification box around its perimeter. A second discharge pipe is provided on the front surface of the second purification box near the bottom. The right end of the other guide pipe is welded and fixed to the second purification box, and the left end of the guide pipe passes through the first sealing cover and communicates with the inside of the first purification box.

[0017] In this invention, the installation of the second observation window allows outside personnel to observe the internal spraying status through the second observation window. A sealing plug is fitted on the second discharge pipe. Opening the sealing plug facilitates the discharge and centralized collection of the solution containing dust particles from the internal spraying. With the cooperation of another guide pipe, the flue gas that has absorbed carbon monoxide in the first purification box is guided into the second purification box to adsorb and filter dust particles.

[0018] Furthermore, the conveying pipe is bonded and fixed to the second purification box, the spray pipe is welded and fixed to the conveying pipe, the spray nozzles are distributed in a ring at equal intervals, and the spray nozzles and spray pipes are integrally formed structures.

[0019] In this invention, the end of the conveying pipe is connected to an external water conveying pipe, continuously conveying water to the second purification box. The water adsorbs dust particles, reducing the pollution impact of dust and metal particles in the flue gas. With the cooperation of multiple nozzles, the conveyed water is atomized, fully contacting and cooperating with the flue gas.

[0020] Specifically, the width of the outer wall of the positioning frame is adapted to the width of the inner wall of the second purification box and is fixedly connected by screws; the width of the outer wall of the limiting plate is adapted to the width of the inner wall of the positioning frame; and the width of the outer wall of the filter cotton is adapted to the width of the outer wall of the limiting plate.

[0021] In this invention, the two sets of positioning frames, along with limiting plates, limit the position of the filter cotton, making it easy to insert and place the filter cotton. The lower filter cotton adsorbs atomized water and filters particulate matter from the passing flue gas. The upper filter cotton filters the flue gas a second time and adsorbs atomized water, reducing the impact of water loss.

[0022] Secondly, the left end of the support plate is welded and fixed to the second purification box, the bottom of the drying filter box is fixedly connected to the top of the support plate by screws, the width of the two drying cottons is adapted to the width of the inner wall of the drying filter box, the right end of the air inlet pipe is welded and fixed to the drying filter box, the air inlet pipe passes through the second sealing cover, and the exhaust pipe is bonded and fixed to the drying filter box.

[0023] In this invention, the two drying cottons work together to dry the flue gas discharged from the second purification box, reducing the discharge of atomized water and pollution of the surrounding environment, and the purified and filtered flue gas is discharged centrally through the exhaust pipe.

[0024] It is worth adding that the flue gas purification mechanism connected to the main body of the steelmaking furnace adopts the flue gas purification component, and the left end of the guide pipe with the exhaust fan is inserted into the exhaust port of the main body of the steelmaking furnace.

[0025] In this invention, the main body of the steelmaking furnace is used for the smelting of corresponding steel, and the guide pipe is connected to an external power source through an exhaust fan. When the control switch is activated, the flue gas inside the main body of the steelmaking furnace is continuously drawn into the corresponding first purification box for sequential purification and filtration. The carbon monoxide in the flue gas is fully adsorbed, and the dust and metal particles in the flue gas are adsorbed and filtered to reduce the pollution impact of emissions on the surrounding environment.

[0026] Compared with the prior art, the beneficial effects of this utility model are:

[0027] 1. This utility model, by setting up a first purification box and a second purification box in cooperation, first filters the flue gas drawn and transported by the exhaust fan through the cuprous chloride solution in the first purification box, then sprays an aqueous solution through the spray pipe in the second purification box, and with the help of two filter cottons, adsorbs dust particles and metal particles in the flue gas. At the same time, the sprayed aqueous solution cools the flue gas. Finally, it is guided into the drying filter box through the air inlet pipe, where the flue gas is filtered through two drying cottons, reducing the discharge of atomized water and pollution of the surrounding environment, and is then discharged and collected through the exhaust pipe.

[0028] This utility model sets up a steelmaking furnace body for corresponding steel smelting. One of the guide pipes is connected to an exhaust fan. The guide pipe is inserted into the exhaust port of the steelmaking furnace body. When the exhaust fan is started, the generated flue gas is continuously drawn into the first purification box and the second purification box for corresponding filtration and purification. With the cooperation of a one-way valve, the backflow of solution at the right end of the guide pipe is reduced, which would affect the flue gas purification treatment. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0030] Figure 2 This is a schematic diagram of the separation structure between the main body of the steelmaking furnace and the guide pipe of this utility model;

[0031] Figure 3 This is a schematic diagram of the separation structure of the first and second purification boxes of this utility model;

[0032] Figure 4 This is a schematic diagram of the frame structure of the second purification box of this utility model;

[0033] Figure 5 This is a schematic diagram of the drying filter box structure of this utility model;

[0034] Figure 6 This is a schematic diagram of the overall cross-sectional structure of this utility model.

[0035] The meanings of the labels in the diagram are as follows:

[0036] 1. Main body of the steelmaking furnace;

[0037] 2. Flue gas purification assembly; 20. First purification chamber; 200. First observation window; 201. First discharge pipe; 202. Liquid inlet pipe; 203. First sealing cover; 21. Second purification chamber; 210. Second observation window; 211. Second discharge pipe; 212. Positioning frame; 213. Limiting plate; 214. Filter cotton; 215. Conveying pipe; 216. Spray pipe; 217. Nozzle; 218. Second sealing cover; 219. Support plate; 22. Drying filter chamber; 220. Drying cotton; 221. Air inlet pipe; 222. Top cover; 223. Exhaust pipe; 23. Guide pipe; 230. One-way valve; 231. Exhaust fan. Detailed Implementation

[0038] 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.

[0039] Example 1

[0040] Please see Figures 3-5 This embodiment provides a technical solution:

[0041] A flue gas purification mechanism includes a flue gas purification component 2. The flue gas purification component 2 is provided with a first purification box 20, a second purification box 21, and a drying filter box 22 from left to right. The left end face of the first purification box 20 and the second purification box 21 are provided with guide pipes 23, and the right end of the guide pipes 23 is provided with a one-way valve 230 near the bottom.

[0042] Furthermore, the first purification chamber 20 is provided with a first sealing cover 203 on the top, a first observation window 200 on the front end face of the first purification chamber 20, a cuprous chloride solution inside the first purification chamber 20, the first observation window 200 is made of tempered glass, the outer walls of the first observation window 200 are bonded and fixed to the side walls of the first purification chamber 20, a first discharge pipe 201 is provided near the bottom on the front end face of the first purification chamber 20, and an inlet pipe 202 is provided near the top on the front end face of the first purification chamber 20. Both the first discharge pipe 201 and the inlet pipe 202 are provided with sealing plugs at their ends.

[0043] In this invention, the first observation window 200 allows external personnel to easily observe the content of the cuprous chloride solution inside. The inlet pipe 202 facilitates the replenishment of the corresponding cuprous chloride solution. The first discharge pipe 201 facilitates the discharge and replacement of the internal cuprous chloride solution. The cuprous chloride solution absorbs carbon monoxide in the flue gas, preventing carbon monoxide from being discharged and polluting the surrounding air. The corresponding sealing plug can be opened to facilitate the replenishment of the internal cuprous chloride solution or the discharge and replacement of the internal solution.

[0044] Specifically, an exhaust fan 231 is provided in the middle of the guide pipe 23 near the left side of the first purification box 20; a rubber pad is provided on the lower surface of the first sealing cover 203; the first sealing cover 203 is fixedly connected to the top of the first purification box 20 with screws; the right end of one of the guide pipes 23 is welded and fixed to the first purification box 20; and the exhaust fan 231 is fixedly connected to the guide pipe 23 with screws.

[0045] In this invention, the first sealing cover 203, in conjunction with the rubber gasket, increases the sealing of the top of the first purification box 20, and the exhaust fan 231 helps to extract the corresponding flue gas and deliver it to the first purification box 20.

[0046] Each guide pipe 23 is equipped with a one-way valve 230 to prevent the backflow of liquid solution at the right end of the guide pipe 23 from affecting the flue gas treatment.

[0047] It should be noted that the second purification box 21 is provided with a second sealing cover 218 on the top and a second observation window 210 on the front face of the second purification box 21. The second observation window 210 is made of tempered glass and is bonded and fixed to the side wall of the second purification box 21 around its perimeter. A second discharge pipe 211 is provided near the bottom on the front face of the second purification box 21. The right end of another guide pipe 23 is welded and fixed to the second purification box 21, and the left end of the guide pipe 23 passes through the first sealing cover 203 and communicates with the inside of the first purification box 20.

[0048] In this invention, the installation of the second observation window 210 allows outside personnel to observe the internal spraying status through the second observation window 210. A sealing plug is fitted on the second discharge pipe 211. Opening the sealing plug facilitates the discharge and centralized collection of the solution containing dust particles from the internal spraying. With the cooperation of another guide pipe 23, the flue gas that has absorbed carbon monoxide in the first purification box 20 is guided into the second purification box 21 to adsorb and filter dust particles.

[0049] Furthermore, a conveying pipe 215 is provided near the top inside the second purification box 21. The end of the conveying pipe 215 extends into the interior and is provided with a spray pipe 216. Several nozzles 217 are provided on the spray pipe 216. The conveying pipe 215 is bonded and fixed to the second purification box 21, and the spray pipe 216 is welded and fixed to the conveying pipe 215. The nozzles 217 are distributed in a ring at equal intervals. The nozzles 217 and the spray pipe 216 are integrally formed structures.

[0050] In this invention, the end of the conveying pipe 215 is connected to an external water conveying pipe, continuously conveying water to the second purification box 21. The water adsorbs dust particles, reducing the pollution impact of dust particles and metal particles in the flue gas. With the cooperation of multiple nozzles 217, the conveyed water is atomized, fully contacting and cooperating with the flue gas.

[0051] Specifically, the second purification box 21 has positioning frames 212 on both the upper and lower sides of the spray pipe 216 inside, and a limiting plate 213 in the middle of the positioning frame 212. Filter cotton 214 is provided on the limiting plate 213. The width of the outer wall of the positioning frame 212 is adapted to the width of the inner wall of the second purification box 21 and is fixedly connected by screws. The width of the outer wall of the limiting plate 213 is adapted to the width of the inner wall of the positioning frame 212, and the width of the outer wall of the filter cotton 214 is adapted to the width of the outer wall of the limiting plate 213.

[0052] In this utility model, with the cooperation of two sets of positioning frames 212, each is equipped with a limiting plate 213 to limit the position of the filter cotton 214, making it convenient for the filter cotton 214 to be inserted and placed. The lower filter cotton 214 adsorbs the atomized water and filters the particulate matter in the passing flue gas. The upper filter cotton 214 filters the flue gas a second time and adsorbs the atomized water, reducing the impact of water loss.

[0053] Furthermore, the drying filter box 22 is installed above the support plate 219 on the right end face of the second purification box 21. Drying cotton 220 is symmetrically arranged inside the drying filter box 22. The top of the drying filter box 22 is provided with a top cover 222. The left end face of the drying filter box 22 is connected to the inside of the second purification box 21 through the air inlet pipe 221 and the second sealing cover 218. The right end face of the drying filter box 22 is provided with an exhaust pipe 223 near the top.

[0054] Secondly, the left end of the support plate 219 is welded and fixed to the second purification box 21, the bottom of the drying filter box 22 is fixedly connected to the top of the support plate 219 by screws, the width of the two drying cotton 220 is adapted to the width of the inner wall of the drying filter box 22, the right end of the air inlet pipe 221 is welded and fixed to the drying filter box 22, the air inlet pipe 221 passes through the second sealing cover 218, and the exhaust pipe 223 is bonded and fixed to the drying filter box 22.

[0055] In this invention, the two drying cottons 220 work together to dry the flue gas discharged from the second purification box 21, reducing the discharge of atomized water and pollution of the surrounding environment, and the purified and filtered flue gas is centrally discharged through the exhaust pipe 223.

[0056] In this embodiment, when the flue gas purification mechanism and steelmaking furnace are in use, the guide pipe 23 with the exhaust fan 231 and the one-way valve 230 is first connected to the first purification box 20 with the first observation window 200. The second purification box 21 is connected to the inside of the first purification box 20 through another guide pipe 23 with the one-way valve 230 passing through the first sealing cover 203. Then, the spray pipe 216 with multiple nozzles 217 is installed on the side wall of the second purification box 21 through the conveying pipe 215. Then, the positioning frame 212 with the limit plate 213 is fixed to the inner wall of the second purification box 21 in sequence. The corresponding filter cotton 214 is placed on the limit plate 213 respectively. The drying filter box 22 with the drying cotton 220 is fixed on the corresponding support plate 219, and the drying filter box 22 is connected to the inside of the second purification box 21 through the air inlet pipe 221.

[0057] The first purification chamber 20 is filled with cuprous chloride solution, which submerges the right end of the left guide pipe 23. Flue gas is drawn from the guide pipe 23 by the exhaust fan 231 and transported to the first purification chamber 20. Carbon monoxide mixed in the flue gas dissolves in the cuprous chloride solution. The flue gas, now free of carbon monoxide, is then compressed by the exhaust fan 231 and enters the second purification chamber 21. The delivery pipe 215 draws aqueous solution from an external pipe and atomizes it through multiple nozzles 217, adsorbing dust and metal particles mixed in the flue gas. With the assistance of two filter cottons 214, the solution is effectively filtered. The filtered flue gas then enters the drying filter chamber 22 through the inlet pipe 221, where two drying cottons 220 adsorb and filter the mist within the flue gas. Finally, the flue gas is discharged from the exhaust pipe 223. The first sealing cover 203, the second sealing cover 218, and the top cover 222 are all easily opened for cleaning.

[0058] Example 2

[0059] Please see Figure 1 , Figure 2 , Figure 6 Based on Example 1, this embodiment provides the following technical solution:

[0060] It is worth adding that the flue gas purification mechanism connected to the main body 1 of the steelmaking furnace adopts the flue gas purification component 2, and the left end of the guide pipe 23 with the exhaust fan 231 is inserted into the exhaust port of the main body 1 of the steelmaking furnace.

[0061] In this invention, the main body 1 of the steelmaking furnace is used for the smelting of corresponding steel, and the guide pipe 23 is connected to an external power source through the exhaust fan 231. The control switch is activated to continuously draw the flue gas inside the main body 1 of the steelmaking furnace into the corresponding first purification box 20, where it is purified and filtered in sequence. The carbon monoxide in the flue gas is fully adsorbed, and the dust particles and metal particles in the flue gas are adsorbed and filtered to reduce the impact of emissions on the surrounding environment.

Claims

1. A flue gas purification mechanism, comprising a flue gas purification component, characterized in that: The flue gas purification assembly is provided with a first purification box, a second purification box, and a drying and filtering box from left to right. The first and second purification boxes are provided with guide pipes on their left end faces, and the guide pipes are provided with one-way valves near the bottom on their right end. The first purification chamber is equipped with a first sealing cover on the top, a first observation window on the front face of the first purification chamber, a cuprous chloride solution inside the first purification chamber, and an exhaust fan located in the middle of the guide pipe near the left side of the first purification chamber. The second purification box is provided with a second sealing cover on the top and a second observation window on the front face of the second purification box. A conveying pipe is provided inside the second purification box near the top. The end of the conveying pipe extends into the interior and is provided with a spray pipe. Several nozzles are provided on the spray pipe. Positioning frames are provided on both the upper and lower sides of the spray pipe inside the second purification box. A limiting plate is provided in the middle of the positioning frame. Filter cotton is provided on the limiting plate. The drying filter box is installed above the support plate on the right end face of the second purification box. The drying filter box is symmetrically equipped with drying cotton inside. The top of the drying filter box is equipped with a top cover. The left end face of the drying filter box is connected to the inside of the second purification box through the air inlet pipe passing through the second sealing cover. The right end face of the drying filter box is equipped with an exhaust pipe near the top.

2. The flue gas purification mechanism according to claim 1, characterized in that: The first observation window is made of tempered glass. The outer walls of the first observation window are bonded and fixed to the side walls of the first purification box. A first discharge pipe is provided near the bottom of the front face of the first purification box, and an inlet pipe is provided near the top of the front face of the first purification box. Both the first discharge pipe and the inlet pipe are provided with sealing plugs at their ends.

3. The flue gas purification mechanism according to claim 2, characterized in that: The lower surface of the first sealing cover is provided with a rubber pad. The first sealing cover is fixedly connected to the top of the first purification box with screws. The right end of one of the guide tubes is welded and fixed to the first purification box. The exhaust fan is fixedly connected to the guide tube with screws.

4. The flue gas purification mechanism according to claim 1, characterized in that: The second observation window is made of tempered glass. The second observation window is bonded and fixed to the side wall of the second purification box around its perimeter. A second discharge pipe is provided on the front surface of the second purification box near the bottom. The right end of another guide pipe is welded and fixed to the second purification box, and the left end of the guide pipe passes through the first sealing cover and communicates with the inside of the first purification box.

5. The flue gas purification mechanism according to claim 1, characterized in that: The delivery pipe is bonded and fixed to the second purification box, the spray pipe is welded and fixed to the delivery pipe, the nozzles are distributed in a ring at equal intervals, and the nozzles and spray pipes are integrally formed.

6. The flue gas purification mechanism according to claim 1, characterized in that: The width of the outer wall of the positioning frame is adapted to the width of the inner wall of the second purification box and is fixedly connected by screws. The width of the outer wall of the limiting plate is adapted to the width of the inner wall of the positioning frame, and the width of the outer wall of the filter cotton is adapted to the width of the outer wall of the limiting plate.

7. The flue gas purification mechanism according to claim 1, characterized in that: The left end of the support plate is welded and fixed to the second purification box. The bottom of the drying filter box is fixedly connected to the top of the support plate by screws. The width of the two drying cottons is adapted to the width of the inner wall of the drying filter box. The right end of the air inlet pipe is welded and fixed to the drying filter box. The air inlet pipe passes through the second sealing cover. The exhaust pipe is bonded and fixed to the drying filter box.

8. A steelmaking furnace, comprising a flue gas purification mechanism connected to the main body of the steelmaking furnace, characterized in that: The flue gas purification mechanism adopts the flue gas purification component as described in any one of claims 1 to 7, with the left end of the guide pipe with the exhaust fan inserted into the exhaust port of the steelmaking furnace body.

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