A blast furnace gas dedusting device

Abstract

The present invention discloses a blast furnace gas dust removal device, specifically relating to the technical field of tail gas treatment devices. It includes a dust removal box and a neutralizing agent feeding device fixedly connected to the lower end of the dust removal box. A neutralizing structure communicated with the neutralizing agent feeding device is arranged in the lower part of the inner cavity of the dust removal box. A spray dust removal structure is arranged above the neutralizing structure, and a filtering structure is arranged at the upper end of the spray dust removal structure. For the blast furnace gas dust removal device of the present invention, the cooperation of the neutralizing structure and the neutralizing agent feeding device is used to neutralize wastes such as sulfides and nitrides in the boiler tail gas. Then, the cooperation of the spray dust removal structure and the water supply structure enables the tail gas to pass through water mist, so that large particulate dust in the tail gas is attached by droplets and falls by gravity. Then, the filtering structure is used to filter small particulate dust therein, and the water supply structure is coordinated to continuously wash the filter screen to prevent dust from accumulating on the filter screen and affecting the gas passing efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of tail gas treatment devices, and particularly to a blast furnace gas dust removal device. Background Art

[0002] The waste gas generated during the blast furnace smelting process contains a large amount of slag and solid particles. These substances not only pollute the environment but also pose a threat to the health of surrounding residents and workers. Therefore, effective dust removal treatment of blast furnace gas is particularly important. Traditional blast furnace gas dust removal technologies mainly include electrostatic precipitators and bag filters. Electrostatic precipitators collect dust through the action of an electric field, while bag filters capture particulate matter using filter bags.

[0003] Chinese Patent Publication No. CN114534387B discloses a blast furnace flue gas dust removal device, including a dust removal box, an exhaust box, and a blast furnace dust removal section. The blast furnace dust removal section includes a first positioning plate, a plurality of filter bags, a plurality of blowing pipes, a first air supply pipe, a plurality of third connecting rods, and a plurality of gear assemblies. The first positioning plate is provided with a plurality of first ventilation holes. Each filter bag is disposed at the lower end of a first ventilation hole, and the third connecting rod can be rotated to communicate with the blowing pipe in a vertical plane; the plurality of gear assemblies are configured to rotate the third connecting rod to communicate with the blowing pipe in a vertical plane.

[0004] The blast furnace flue gas dust removal device described in the above patent document can treat a large amount of soot generated during the iron-making process of the blast furnace, avoid serious blockage of local filter bags without blowing, and avoid damage to the initial layer due to less soot accumulation in local filter bags, improving the air pollution caused by blast furnace iron-making and being conducive to the construction of a friendly environment.

[0005] However, the traditional technology has several significant limitations. First, although the electrostatic precipitator has improved collection efficiency, its operating cost is high and it has certain requirements for the size and shape of slag particles. Therefore, its effect varies when dealing with solid particles of different sizes and shapes in blast furnace gas. Although the bag filter has a wide range of applications, its tolerance to high-temperature, high-humidity, and corrosive gas environments is limited, and the maintenance and replacement of filter bags are also very cumbersome. Summary of the Invention

[0006] The main object of the present invention is to provide a blast furnace gas dust removal device, which can effectively solve the problem that most existing devices use bag-type dust removal devices that need to be frequently replaced and maintained and cannot operate continuously.

[0007] To achieve the above object, the technical solution adopted by the present invention is as follows:

[0008] A blast furnace gas dust removal device includes a dust removal box and a neutralizing agent feeding device fixedly connected to the lower end of the dust removal box. A cooling structure is arranged at the upper end of the dust removal box. An air outlet pipe and an air inlet pipe communicating with its inner cavity are fixedly connected to the upper and lower parts of the front end of the dust removal box respectively. A neutralizing structure communicating with the neutralizing agent feeding device is arranged at the lower part of the inner cavity of the dust removal box. A spray dust removal structure is arranged above the neutralizing structure. A filtering structure is arranged at the upper end of the spray dust removal structure. A water supply structure communicating with the spray dust removal structure and the filtering structure is arranged at the lower right end of the dust removal box.

[0009] Preferably, the water supply structure includes a water tank fixedly connected to the right end of the dust removal box. A water replenishing pipe and a maintenance opening are arranged at the upper end of the water tank. A filter plate is fixedly connected to the upper part of the inner cavity of the water tank. A water pump is fixedly connected to the bottom wall of the inner cavity of the water tank. The output end of the water pump is fixedly connected to a water supply pipe communicating with the spray dust removal structure and the filtering structure.

[0010] Preferably, the neutralizing structure includes flow guiding covers symmetrically distributed in the front and back and fixedly connected to the bottom wall of the inner cavity of the dust removal box. The two flow guiding covers face in opposite directions and a reaction pipe is fixedly connected to the common end where they are close to each other. A number of flow guiding plates are linearly distributed and fixedly connected to the inner surface of the reaction pipe. A feeding pipe communicating with the neutralizing agent feeding device is fixedly connected to the common inner surface of the number of flow guiding plates. Turbulence fan blades are rotatably connected to the outer surface of the feeding pipe between adjacent two flow guiding plates. The front flow guiding cover communicates with the air inlet pipe, and the inner cavity of the rear flow guiding cover communicates with the inner cavity of the dust removal box.

[0011] Preferably, a fixing hole is opened in the middle of the front end of the flow guiding plate. The inner surface of the fixing hole is fixedly connected to the outer surface of the feeding pipe. A number of front and back communicating flow guiding holes are opened around the fixing hole at the front end of the fixing hole. The path of the flow guiding holes is a spiral line;

[0012] A number of through holes two are annularly distributed on the outer surface of the feeding pipe where the turbulence fan blades rotate. A number of through holes one communicating with the through holes two are annularly distributed on the outer surface of the rotating shaft of the turbulence fan blades and the feeding pipe.

[0013] Preferably, the spray dust removal structure includes a connecting plate fixedly connected to the upper ends of the two flow guiding covers and a top plate fixedly connected to the middle of the inner cavity of the dust removal box. A communication hole communicating with the water tank is opened on the right side wall of the inner surface of the connecting plate. A number of spray components communicating with the water supply pipe are linearly distributed and fixedly connected to the lower end of the top plate. The communication hole is located above the filter plate.

[0014] Preferably, the spray component includes a connecting pipe one fixedly connected to the lower end of the top plate and communicating with the water supply pipe. The lower end of the connecting pipe one is rotatably connected to an installation seat communicating with its inner cavity. A number of spray heads one communicating with its inner cavity are annularly distributed and fixedly connected to the lower end of the installation seat. The number of spray heads one are distributed in a clockwise direction and have the same orientation.

[0015] Preferably, the filtering structure includes a filtering component fixedly connected to the upper end of the top plate in a linear distribution and a mounting plate fixedly connected to the upper part of the inner cavity of the dust removal box. A plurality of mounting grooves are linearly distributed and opened on the bottom wall of the inner cavity of the mounting plate. A uniform flow pipe communicated with the water supply pipe is fixedly connected to the inner cavity of the mounting plate. Overflow holes corresponding to the positions of the mounting grooves are opened at both the left and right ends of the uniform flow pipe. Siphon components fixedly connected to the inner surfaces of the adjacent mounting grooves are arranged at the upper ends of the plurality of filtering components. A drainage groove communicated with the plurality of filtering components is opened in the inner cavity of the top plate. The front part of the drainage groove penetrates through the inner cavity of the top plate and extends to the front end of the top plate. The upper end of the mounting plate is fixedly connected to the cooling structure.

[0016] Preferably, the filtering component includes a frame fixedly connected to the upper end of the top plate. A filter net is fixedly connected to the inner surface of the frame. A plurality of spray heads two facing the filter net are linearly distributed and fixedly connected to the top wall of the inner surface of the frame in front of the filter net. A plurality of communicating pipes two communicated with the adjacent spray heads two are opened at the upper end of the frame. Butterfly valves are rotatably connected to the inner surfaces of the plurality of communicating pipes two. Flow guide grooves communicated with the drainage groove are symmetrically opened on the left and right sides of the bottom wall of the inner surface of the frame in front of the filter net.

[0017] Preferably, the siphon component includes a U-shaped plate fixedly connected to the inner surface of the mounting groove. The U-shaped plate opens downward, and L-shaped plates fixedly connected to the front and rear sides of the inner wall of the mounting groove are symmetrically arranged on the inner side thereof. The upper parts of the adjacent sides of the vertical parts of the two L-shaped plates are inclined planes to form a funnel shape. The lower end of the L-shaped plate is closely attached to the upper end of the frame. The communicating pipe two is located between the vertical parts of the two L-shaped plates.

[0018] Preferably, the cooling structure includes a shielding cover fixedly connected to the upper end of the dust removal box. A fan fixedly connected to the inner cavity thereof is fixedly connected to the front end of the shielding cover. An air outlet communicated with the inner cavity thereof is opened at the rear end of the shielding cover. A plurality of straight plates symmetrically distributed left and right are fixedly connected to the bottom wall of the inner cavity of the shielding cover in a rectangular distribution. V-shaped plates are arranged on the rear sides of the opposite two straight plates. The V-shaped plates open forward. The lower ends of the straight plates and the V-shaped plates penetrate through the bottom wall of the inner cavity of the shielding cover and extend to the upper part of the inner cavity of the dust removal box and are fixedly connected to the upper end of the mounting plate.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The present invention uses the cooperation of a neutralization structure and a neutralizing agent dispensing device to neutralize waste such as sulfides and nitrides in boiler tail gas. Then, through the cooperation of a spray dust removal structure and a water supply structure, the tail gas passes through water mist, and large particulate dust in the tail gas is attached by droplets and falls by gravity. Then, the filtering structure is used to filter small particulate dust, and the water supply structure continuously flushes the filter screen to prevent dust from accumulating on the filter screen and affecting the gas passing efficiency. Finally, the tail gas is further cooled by the cooling structure to prepare for subsequent treatment.

[0021] The present invention uses the cooperation of a deflector plate and a turbulence fan blade to make the tail gas entering the reaction tube through a flow guide cover form a swirl and drive the turbulence fan blade to rotate. Through the cooperation of through hole two and through hole one, the neutralizing agent fed by the neutralizing agent dispensing device is intermittently fed into the reaction tube, and the mixed gas of the tail gas and the neutralizing agent is disturbed by the action of the turbulence fan blade to accelerate its reaction rate and improve the tail gas treatment efficiency.

[0022] The present invention continuously supplies water to the spray component through the water supply structure, and the water is sprayed in a mist form through the action of the spray component. At the same time, the spray head one drives the mounting seat to rotate while spraying water mist, so that the sprayed water mist forms a swirl, thereby driving the tail gas to fully mix and react with the water mist. Large particulate dust nuclei in the tail gas are attached by the water mist, form droplets, fall from the air into the receiving plate, and flow back to the water tank through the communication hole. The water flowing back is treated by the filter plate arranged in the water tank to realize recycling.

[0023] The present invention uses the filtering component to treat small particulate dust in the tail gas that cannot be attached by droplets, and uses the flow equalizing pipe and the mounting groove to provide water source for the siphon component. Through the cooperation of the siphon component and the filtering component, the filtering component is cleaned to prevent dust from accumulating on the filter screen and affecting the filtering efficiency of the filter screen. The wastewater generated after cleaning will flow into the receiving plate through the diversion groove and the drainage groove and flow back to the water tank through the communication hole for recycling. Description of the Drawings

[0024] Figure 1 is a schematic diagram of the overall structure of the present invention;

[0025] Figure 2 is a schematic cross-sectional view of the internal structure of the dust removal box of the present invention;

[0026] Figure 3 is a schematic cross-sectional view of the internal structure of the neutralization structure of the present invention;

[0027] Figure 4 is a schematic diagram of the structure of the deflector plate of the present invention;

[0028] Figure 5 is a schematic diagram of the structure of the water supply structure of the present invention;

[0029] Figure 6 It is a schematic structural diagram of the spray dust removal structure of the present invention;

[0030] Figure 7 It is a schematic structural diagram of the spray component of the present invention;

[0031] Figure 8 It is a schematic structural diagram of the filtration structure of the present invention;

[0032] Figure 9 It is a schematic diagram of the explosion effect of the filtration structure of the present invention;

[0033] Figure 10 It is a schematic diagram of a partial structure of the filtration component of the present invention;

[0034] Figure 11 It is a schematic sectional view of a partial structure of the filtration component of the present invention;

[0035] Figure 12 It is a schematic diagram of the connection relationship between the diversion groove and the drainage groove of the present invention;

[0036] Figure 13 For the present invention Figure 9 The enlarged schematic diagram of the partial structure at A in;

[0037] Figure 14 It is a schematic structural diagram of the cooling structure of the present invention.

[0038] In the figure: 1. Cooling structure; 11. Shielding cover; 12. Fan; 13. Straight plate; 14. V-shaped plate; 15. Air outlet; 2. Dust removal box; 3. Neutralizing agent feeding device; 4. Air outlet pipe; 5. Air inlet pipe; 6. Water supply structure; 61. Water tank; 62. Filter plate; 63. Water pipe; 64. Water pump; 7. Neutralizing structure; 71. Deflector; 72. Reaction tube; 73. Deflector plate; 731. Fixed hole; 732. Deflection hole; 74. Turbulence fan blade; 741. Through hole one; 75. Feeding pipe; 751. Through hole two; 8. Spray dust removal structure; 81. Bearing plate; 82. Communication hole; 83. Spray component; 831. Communication pipe one; 832. Mounting seat; 833. Spray head one; 84. Top plate; 9. Filtration structure; 91. Mounting plate; 92. Filtration component; 921. Frame; 922. Filter screen; 923. Communication pipe two; 924. Spray head two; 925. Butterfly valve; 926. Diversion groove; 93. Flow equalizing pipe; 931. Overflow hole; 94. Mounting groove; 95. Siphon component; 951. U-shaped plate; 952. L-shaped plate; 96. Drainage groove. Detailed implementation manners

[0039] In order to make the technical means, creative features, achieved purposes and effects of the present invention easy to understand, the present invention will be further described below in conjunction with specific implementation manners. Example 1

[0040] As Figure 1 and Figure 2 shown, a blast furnace gas dust removal device includes a dust removal box 2 and a neutralizing agent feeding device 3 fixedly connected to the lower end of the dust removal box 2. A cooling structure 1 is arranged at the upper end of the dust removal box 2. An air outlet pipe 4 and an air inlet pipe 5 communicating with its inner cavity are respectively fixedly connected to the upper and lower parts of the front end of the dust removal box 2. A neutralizing structure 7 communicating with the neutralizing agent feeding device 3 is arranged at the lower part of the inner cavity of the dust removal box 2. A spray dust removal structure 8 is arranged above the neutralizing structure 7. A filtering structure 9 is arranged at the upper end of the spray dust removal structure 8. A water supply structure 6 communicating with the spray dust removal structure 8 and the filtering structure 9 is arranged at the lower part of the right end of the dust removal box 2.

[0041] It should be particularly noted that the above-mentioned neutralizing agent feeding device 3 is a feeding device that can continuously supply desulfurization neutralizing agent to the neutralizing structure 7. It is a mature feeding device and has been widely used in the prior art. In the present invention, only its function of continuously supplying neutralizing agent to the neutralizing structure 7 is utilized, and its internal structure and specific principle will not be elaborated herein.

[0042] During the operation of this embodiment, the cooperation between the neutralizing structure 7 and the neutralizing agent feeding device 3 is used to neutralize waste such as sulfides and nitrides in the boiler tail gas. Then, the cooperation between the spray dust removal structure 8 and the water supply structure 6 is used to make the large-particle dust in the tail gas be attached by liquid droplets through water mist and fall by gravity. Then, the filtering structure 9 is used to filter the small-particle dust therein, and the water supply structure 6 is used to continuously wash the filter screen to avoid the accumulation of dust on the filter screen and affect the gas passing efficiency. Finally, the tail gas is further cooled by the cooling structure 1 to prepare for subsequent treatment. Example 2

[0043] Based on Example 1, in this embodiment, the cooperation between the guide plate 73 and the spoiler fan blade 74 is used to make the tail gas entering the reaction tube 72 from the guide cover 71 form a swirl and drive the spoiler fan blade 74 to rotate. The neutralizing agent fed by the neutralizing agent feeding device 3 is intermittently fed into the reaction tube 72 through the cooperation of the through hole two 751 and the through hole one 741. The spoiler fan blade 74 is used to disturb the mixed gas of the tail gas and the neutralizing agent, accelerate its reaction rate, and improve the tail gas treatment efficiency.

[0044] Specifically, to achieve the neutralization treatment of some harmful gases in the blast furnace tail gas, refer to Figure 3, the neutralization structure 7 includes flow guide covers 71 symmetrically distributed front and back and fixedly connected to the inner cavity bottom wall of the dust removal box 2. The two flow guide covers 71 face in opposite directions, and a reaction tube 72 is fixedly connected to the ends where they are close to each other. A number of flow guide plates 73 are linearly distributed and fixedly connected to the inner surface of the reaction tube 72. A delivery pipe 75 connected to the neutralizing agent delivery device 3 is fixedly connected to the common inner surface of the number of flow guide plates 73. Turbulence fan blades 74 are rotatably connected to the outer surfaces of the delivery pipe 75 located between adjacent flow guide plates 73. The front flow guide cover 71 is connected to the air inlet pipe 5, and the inner cavity of the rear flow guide cover 71 is connected to the inner cavity of the dust removal box 2.

[0045] Further, to promote the reaction between the neutralizing agent and the tail gas, refer to Figure 3 and Figure 4 , a fixing hole 731 is opened in the middle of the front end of the flow guide plate 73. The inner surface of the fixing hole 731 is fixedly connected to the outer surface of the delivery pipe 75. A number of front and rear communicating flow guide holes 732 are annularly distributed around the fixing hole 731 at the front end of the fixing hole 731, and the path of the flow guide holes 732 is a spiral line; a number of through holes two 751 are annularly distributed on the outer surface of the delivery pipe 75 where the turbulence fan blades 74 rotate, and a number of through holes one 741 communicating with the through holes two 751 are annularly distributed on the outer surface of the rotation shaft of the turbulence fan blades 74 and the delivery pipe 75.

[0046] In summary, after the gas enters the flow guide cover 71 through the air inlet pipe 5, since the path of the flow guide cover 71 changes from wide to narrow, the flow rate of the gas sent into the reaction tube 72 is accelerated. And due to the action of the flow guide holes 732, the tail gas will pass through the flow guide holes 732 in a spiral path and impact on the fan blades of the turbulence fan blades 74, thereby driving the turbulence fan blades 74 to rotate. When the turbulence fan blades 74 rotate, the through holes one 741 and the through holes two 751 will be staggered and conducted. At this time, the neutralizing agent gas provided by the neutralizing agent delivery device 3 to the delivery pipe 75 will be sprayed into the tail gas through the through holes two 751 and the through holes one 741 and react with the tail gas. At this time, under the disturbance of the turbulence fan blades 74, the tail gas and the neutralizing agent are evenly mixed and react. By setting a plurality of flow guide plates 73 and turbulence fan blades 74, the content of harmful substances in the tail gas can be effectively reduced, and the separation of some harmful substances and air can be realized. Embodiment Three

[0047] On the basis of Embodiment Two, in this embodiment, the water supply structure 6 continuously supplies water to the spray assembly 83, and the water is sprayed in a mist form through the action of the spray assembly 83. And by the action of the first spray head 833, the mounting seat 832 is driven to rotate while spraying the water mist, so that the sprayed water mist forms a swirling flow, thereby driving the tail gas to be fully mixed and reacted with the water mist. The large particle dust nuclei in the tail gas are attached to the water mist and form droplets that fall from the air into the receiving plate 81 and flow back to the water tank 61 through the communication holes 82. And the water flowing back is treated by the filter plate 62 provided in the water tank 61 to realize recycling.

[0048] Specifically, to continuously supply water to the tail gas treatment process, refer to Figure 5 , the water supply structure 6 includes a water tank 61 fixedly connected to the right end of the dust removal box 2. A water replenishing pipe and a maintenance opening are provided at the upper end of the water tank 61. A filter plate 62 is fixedly connected to the upper part of the inner cavity of the water tank 61. A water pump 64 is fixedly connected to the bottom wall of the inner cavity of the water tank 61. The output end of the water pump 64 is fixedly connected to a water supply pipe 63 that communicates with the spray dust removal structure 8 and the filtration structure 9.

[0049] The water pump 64 in the water tank 61 continuously supplies water to the spray dust removal structure 8 and the filtration structure 9 through the water supply pipe 63. At the same time, the filter plate 62 is used to filter the water flowing back from the spray dust removal structure 8, separating the dust therein to prevent the dust from clogging the water pump 64. The filter plate 62 can be replaced and cleaned through the maintenance opening.

[0050] Furthermore, to realize the adsorption and neutralization of harmful substances soluble in water in the tail gas by using water mist, refer to Figure 6 , the spray dust removal structure 8 includes a receiving plate 81 fixedly connected to the upper ends of two flow guiding covers 71 and a top plate 84 fixedly connected to the middle part of the inner cavity of the dust removal box 2. A communication hole 82 communicating with the water tank 61 is provided on the right side wall of the inner surface of the receiving plate 81. A plurality of spray components 83 communicating with the water supply pipe 63 are linearly and fixedly connected to the lower end of the top plate 84. The communication hole 82 is located above the filter plate 62.

[0051] The receiving plate 81 is used to receive the water mist sprayed by the spray components 83. Due to the flow of the tail gas, the water mist will be carried forward by the airflow after being sprayed and will not fall backward to the area where the neutralization structure 7 is located. The water supply pipe 63 communicates with the spray components 83 inside the top plate 84, continuously providing water source for the top plate 84. The inner side of the receiving plate 81 has a certain slope, and the end point of the slope is the area where the communication hole 82 is located. Thus, the water on the receiving plate 81 will flow back to the water tank 61 through the communication hole 82.

[0052] Furthermore, to promote the reaction rate between the water mist and the tail gas, refer to Figure 7 , the spray component 83 includes a first communication pipe 831 fixedly connected to the lower end of the top plate 84 and communicating with the water supply pipe 63. The lower end of the first communication pipe 831 is rotatably connected to a mounting seat 832 communicating with its inner cavity. A plurality of first spray heads 833 communicating with its inner cavity are annularly and fixedly connected to the lower end of the mounting seat 832. The plurality of first spray heads 833 are distributed in a clockwise direction and have the same orientation.

[0053] The connecting pipe 831 provides water source for the first spray head 833, and under the action of water pressure, water will be ejected from the nozzle of the first spray head 833. Since the first spray heads 833 are oriented in the same direction, after the water mist is ejected, due to the reaction force, the first spray head 833 will push the mounting seat 832 to rotate, so that the ejected water mist is ejected in a spiral shape and impacts with the tail gas. At this time, the tiny droplets in the water mist are carried forward by the tail gas and collide with the dust particles in the tail gas;

[0054] When the dust particles collide with the droplets, the droplets will adhere to the surface of the dust particles and gradually aggregate to form large droplets until the droplets can overcome the buoyancy generated by the flow of the tail gas and fall on the receiving plate 81. Embodiment 4

[0055] In this embodiment, on the basis of Embodiment 3, the filtering component 92 is used to process the small particle dust in the tail gas that cannot be attached by the droplets, and the uniform flow pipe 93 and the installation groove 94 are used to provide water source for the siphon component 95. Through the cooperation of the siphon component 95 and the filtering component 92, the filtering component 92 is cleaned to prevent the dust accumulation on the filter screen 922 from affecting the filtering efficiency of the filter screen 922. The waste water generated after cleaning will flow into the receiving plate 81 through the diversion groove 926 and the drainage groove 96 and flow back to the water tank 61 through the communication hole 82 for recycling.

[0056] Specifically, to filter and process some small particle dust and impurities in the tail gas, refer to Figure 8 and Figure 9 , the filtering structure 9 includes a filtering component 92 fixedly connected to the upper end of the top plate 84 in a linear distribution and a mounting plate 91 fixedly connected to the upper part of the inner cavity of the dust removal box 2. A plurality of mounting grooves 94 are linearly distributed and opened on the bottom wall of the inner cavity of the mounting plate 91. A uniform flow pipe 93 communicated with the water supply pipe 63 is fixedly connected to the inner cavity of the mounting plate 91. Overflow holes 931 corresponding to the positions of the mounting grooves 94 are opened at both the left and right ends of the uniform flow pipe 93. Siphon components 95 fixedly connected to the inner surfaces of the adjacent mounting grooves 94 are arranged at the upper ends of the plurality of filtering components 92. A drainage groove 96 communicated with the plurality of filtering components 92 is opened in the inner cavity of the top plate 84. The front part of the drainage groove 96 penetrates through the inner cavity of the top plate 84 and extends to the front end of the top plate 84. The upper end of the mounting plate 91 is fixedly connected to the cooling structure 1.

[0057] When the tail gas passes through the filtering component 92, it will be filtered by a plurality of filtering components 92 in turn. Among them, the fine dust will stay on the filtering component 92 under the action of the filtering component 92. During the process of the dust gradually accumulating on the filtering component 92, the uniform flow pipe 93 communicated with the water supply pipe 63 will continuously store water and at the same time flow into the mounting groove 94 through the overflow hole 931, and intermittently flush the filter screen on the filtering component 92 through the action of the siphon component 95, ensuring the passing efficiency of the tail gas through the filtering component 92 and maintaining the cleanliness of the filter screen in the filtering component 92.

[0058] Further, to filter small molecule dust and impurities, refer to Figure 10 , Figure 11 and Figure 12 , the filtering component 92 includes a frame 921 fixedly connected to the upper end of the top plate 84. A filter screen 922 is fixedly connected to the inner surface of the frame 921. A plurality of spray nozzles two 924 facing the filter screen 922 are linearly distributed and fixedly connected to the top wall of the inner surface of the frame 921 in front of the filter screen 922. A plurality of spray nozzles two 924 communicating with adjacent spray nozzles two 924 are provided at the upper end of the frame 921. Butterfly valves 925 are rotatably connected to the inner surfaces of a plurality of connecting pipes two 923. Flow guiding grooves 926 communicating with the drain tank 96 are symmetrically opened on the left and right sides of the bottom wall of the inner surface of the frame 921 in front of the filter screen 922.

[0059] The connecting pipe two 923 on the frame 921 communicating with the inner spray nozzle two 924 can cooperate with the siphon component 95 to supply water to the spray nozzle two 924 and wash the filter screen 922 through the spray nozzle two 924. The butterfly valve 925 in the connecting pipe two 923 is a conventional butterfly-shaped one-way valve, which is composed of two inclined disc pieces rotating with the central axis. Since its outer edge is closely attached to the inner wall of the connecting pipe two 923, it can only flip in one direction and is used as a one-way valve here to ensure the one-way conduction of the connecting pipe two 923.

[0060] The flow guiding groove 926 communicates with the drain tank 96 to guide the wastewater formed by washing the filter screen 922 to flow into the drain tank 96 through the flow guiding groove 926, and finally return to the water tank 61 through the drain tank 96 and the receiving plate 81.

[0061] Further, to intermittently wash the filter screen 922 to ensure the tail gas filtering efficiency of the filter screen 922, refer to Figure 13 , the siphon component 95 includes a U-shaped plate 951 fixedly connected to the inner surface of the installation groove 94. The opening of the U-shaped plate 951 faces downward, and L-shaped plates 952 respectively fixedly connected to the front and rear sides of the inner wall of the installation groove 94 are symmetrically arranged on the left and right sides of its inner side. The upper parts of the mutually close sides of the vertical parts of the two L-shaped plates 952 are inclined planes to make it funnel-shaped. The lower end of the L-shaped plate 952 is closely attached to the upper end of the frame 921. The connecting pipe two 923 is located between the vertical parts of the two L-shaped plates 952.

[0062] After the water flows into the installation groove 94 through the overflow hole 931, it will gradually rise on both the inner and outer sides of the U-shaped plate 951 and finally overflow the vertical parts of the L-shaped plates 952 to enter the trumpet-shaped opening formed by the two U-shaped plates 951, and flow downward along the channels formed by the vertical parts of the two L-shaped plates 952 and enter the spray nozzle two 924 through the connecting pipe two 923;

[0063] Due to the siphon effect, water will continuously flow into the connecting pipe two 923 until the water in the installation groove 94 cannot meet the sealing of the flow channel, and the siphon effect stops. The water in the installation groove 94 continues to store water under the action of the overflow hole 931. Embodiment Five

[0064] On the basis of Embodiments One to Four, this embodiment further cools the tail gas treated by the neutralization structure 7, the spray dust removal structure 8, and the filtration structure 9 to prepare for subsequent treatment of other harmful substances.

[0065] Specifically, to further cool the treated tail gas, refer to Figure 14 , the cooling structure 1 includes a shielding cover 11 fixedly connected to the upper end of the dust removal box 2. The front end of the shielding cover 11 is fixedly connected with a fan 12 communicating with its inner cavity. The rear end of the shielding cover 11 is provided with an air outlet 15 communicating with its inner cavity. A plurality of straight plates 13 symmetrically distributed left and right are fixedly connected to the bottom wall of the inner cavity of the shielding cover 11 in a rectangular distribution. V-shaped plates 14 are arranged on the rear sides of the opposite two straight plates 13. The V-shaped plates 14 open forward. The lower ends of the straight plates 13 and the V-shaped plates 14 penetrate through the bottom wall of the inner cavity of the shielding cover 11 and extend to the upper part of the inner cavity of the dust removal box 2 and are fixedly connected to the upper end of the mounting plate 91.

[0066] The tail gas treated by the filtration structure 9 will impact on the rear V-shaped plates 14 at the rear and be split by the V-shaped plates 14 and impact on the straight plates 13 on both sides. After passing through multiple groups of V-shaped plates 14 and straight plates 13 in sequence, it finally flows out through the air outlet pipe 4 to the subsequent treatment equipment for harmful substances. During this period, heat exchange occurs between the tail gas and the V-shaped plates 14 and the straight plates 13, and the heat accumulated on the straight plates 13 and the V-shaped plates 14 will be cooled by the action of the fan 12.

[0067] The above shows and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of the present invention claimed is defined by the appended claims and their equivalents.

Claims

1. A blast furnace gas dust removal device, comprising a dust removal box (2) and a neutralizing agent delivery device (3) fixedly connected to the lower end of the dust removal box (2), characterized in that: The upper end of the dust removal box (2) is provided with a cooling structure (1); the upper and lower parts of the front end of the dust removal box (2) are respectively fixedly connected with an air outlet pipe (4) and an air inlet pipe (5) in communication with the inner cavity thereof; the lower part of the inner cavity of the dust removal box (2) is provided with a neutralization structure (7) in communication with the neutralizer delivery device (3); the upper part of the neutralization structure (7) is provided with a spray dust removal structure (8); the upper end of the spray dust removal structure (8) is provided with a filtering structure (9); and the lower part of the right end of the dust removal box (2) is provided with a water supply structure (6) in communication with the spray dust removal structure (8) and the filtering structure (9); The neutralization structure (7) comprises a flow guide cover (71) which is symmetrically distributed front and back and fixedly connected to the bottom wall of the inner cavity of the dust removal box (2); two ends of the flow guide covers (71) facing opposite directions and close to each other are fixedly connected to a reaction tube (72); the inner surface of the reaction tube (72) is fixedly connected to a plurality of linearly distributed flow guide plates (73); the inner surfaces of the plurality of flow guide plates (73) are fixedly connected to a delivery pipe (75) which is connected to the neutralizer delivery device (3); and the outer surface of the delivery pipe (75) located between two adjacent flow guide plates (73) is rotatably connected to a flow disturbance fan blade (74); A fixing hole (731) is provided in the middle of the front end of the guide plate (73), the inner surface of the fixing hole (731) is fixedly connected to the outer surface of the delivery tube (75), and a plurality of guide holes (732) connected front and rear are provided in an annular manner around the fixing hole (731) at the front end of the fixing hole (731), and the path of the guide holes (732) is a spiral line; The outer surface of the delivery tube (75) and the rotating part of the spoiler blade (74) are provided with a plurality of second through holes (751) distributed in an annular manner, and the outer surface of the rotating shaft of the spoiler blade (74) and the delivery tube (75) are provided with a plurality of first through holes (741) in an annular manner and in communication with the second through holes (751).

2. A blast furnace gas dust removal device according to claim 1, characterized in that: The water supply structure (6) comprises a water tank (61) fixedly connected to the right end of the dust removal box (2); a water supply pipe and an inspection port are arranged at the upper end of the water tank (61); a filter plate (62) is fixedly connected to the upper part of the inner cavity of the water tank (61); a water pump (64) is fixedly connected to the bottom wall of the inner cavity of the water tank (61); and a water supply pipe (63) in communication with the spray dust removal structure (8) and the filter structure (9) is fixedly connected to the output end of the water pump (64).

3. A blast furnace gas dust removal device according to claim 1, characterized in that: The air guide cover (71) located at the front is in communication with the air inlet pipe (5), and the inner cavity of the air guide cover (71) located at the rear is in communication with the inner cavity of the dust removal box (2).

4. A blast furnace gas dust removal device according to claim 3, characterized in that: The spray dust removal structure (8) comprises a receiving plate (81) fixedly connected to the upper ends of the two flow guide covers (71) and a top plate (84) fixedly connected to the middle of the inner cavity of the dust removal box (2); a connecting hole (82) connected to the water tank (61) is provided on the right side wall of the inner surface of the receiving plate (81); a plurality of linearly distributed spray assemblies (83) connected to the water supply pipe (63) are fixedly connected to the lower end of the top plate (84); and the connecting hole (82) is located on the upper part of the filter plate (62).

5. A blast furnace gas dust removal device according to claim 4, characterized in that: The spray assembly (83) comprises a connecting pipe (831) fixedly connected to the lower end of the top plate (84) and connected to the water supply pipe (63); the lower end of the connecting pipe (831) is rotatably connected to a mounting seat (832) connected to its inner cavity; the lower end of the mounting seat (832) is fixedly connected to a plurality of spray heads (833) connected to its inner cavity and distributed in an annular manner; the plurality of spray heads (833) are distributed in a clockwise direction and have the same orientation.

6. A blast furnace gas dust removal device according to claim 4, characterized in that: The filtering structure (9) comprises a filtering assembly (92) fixedly connected to the upper end of the top plate (84) and linearly distributed, and a mounting plate (91) fixedly connected to the upper part of the inner cavity of the dust removal box (2); the inner cavity bottom wall of the mounting plate (91) is provided with a plurality of linearly distributed mounting grooves (94); the inner cavity of the mounting plate (91) is fixedly connected with a flow equalizing pipe (93) connected with a water supply pipe (63); the left and right ends of the flow equalizing pipe (93) are provided with overflow holes (931) corresponding to the positions of the mounting grooves (94); the upper ends of the plurality of filtering assemblies (92) are provided with siphon assemblies (95) fixedly connected to the inner surfaces of adjacent mounting grooves (94); the inner cavity of the top plate (84) is provided with a drainage groove (96) connected with the plurality of filtering assemblies (92); the front part of the drainage groove (96) passes through the inner cavity of the top plate (84) and extends to the front end of the top plate (84); the upper end of the mounting plate (91) is fixedly connected to the cooling structure (1).

7. A blast furnace gas dust removal device according to claim 6, characterized in that: The filter assembly (92) comprises a frame (921) fixedly connected to the upper end of the top plate (84); a filter screen (922) is fixedly connected to the inner surface of the frame (921); a portion of the top wall of the inner surface of the frame (921) located in front of the filter screen (922) is fixedly connected to a plurality of spray heads (924) facing the filter screen (922) and distributed linearly; a plurality of connecting pipes (923) connected to adjacent spray heads (924) are provided at the upper end of the frame (921); butterfly valves (925) are rotatably connected to the inner surfaces of the plurality of connecting pipes (923); and a portion of the bottom wall of the inner surface of the frame (921) located in front of the filter screen (922) is symmetrically provided with guide grooves (926) connected to the drainage groove (96).

8. A blast furnace gas dust removal device according to claim 7, characterized in that: The siphon assembly (95) comprises a U-shaped plate (951) fixedly connected to the inner surface of the mounting groove (94), the U-shaped plate (951) opening downwards, and L-shaped plates (952) fixedly connected to the front and rear sides of the inner wall of the mounting groove (94) are symmetrically arranged on the inner side of the U-shaped plate (951), the upper parts of the two vertical parts of the L-shaped plates (952) close to each other are inclined to form a funnel shape, the lower end of the L-shaped plate (952) is tightly attached to the upper end of the frame (921), and the second connecting pipe (923) is located between the vertical parts of the two L-shaped plates (952).

9. A blast furnace gas dust removal device according to claim 6, characterized in that: The cooling structure (1) comprises a shielding cover (11) fixedly connected to the upper end of the dust removal box (2); a fan (12) in communication with the inner cavity of the shielding cover (11) is fixedly connected to the front end of the shielding cover (11); an air outlet (15) in communication with the inner cavity of the shielding cover (11) is provided at the rear end of the shielding cover (11); a plurality of straight plates (13) in a rectangular distribution and in a left-right symmetrical distribution are fixedly connected to the bottom wall of the inner cavity of the shielding cover (11); a V-shaped plate (14) is provided on the rear side of two of the straight plates (13); the opening of the V-shaped plate (14) faces forward; the lower ends of the straight plates (13) and the V-shaped plate (14) penetrate the bottom wall of the inner cavity of the shielding cover (11) and extend to the upper part of the inner cavity of the dust removal box (2) and are fixedly connected to the upper end of the mounting plate (91).

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