An environmental protection treatment device for iron and steel metallurgical waste gas

Abstract

The present invention discloses an environmental protection treatment device for waste gas in iron and steel metallurgy, including a spray tower body, an annular base, an observation port, an air inlet, and an exhaust port. The annular base is located below the spray tower body, and a support baffle is installed between the annular base and the spray tower body. The observation hole is opened above one side surface of the spray tower body, the air inlet is opened below the other side surface of the spray tower body, and the exhaust hole is opened at the center above the spray tower body. It also includes a reciprocating sleeve shaft and a spiral baffle. By setting the spiral baffle in the present invention, the flow path of the waste gas inside the spray tower is increased, and the contact area between the waste gas and the spray water is increased by using a packing layer. Through the settings of spray holes one and two, the contact between the waste gas and the spray water is made more sufficient, improving the treatment effect of the waste gas. By the reciprocating rotation of the spray cross pipe in the spiral U-shaped mesh cover, the contact area between the waste gas and the spray water is increased, maximizing the treatment effect of the waste gas.

Description

Technical Field

[0001] The present invention relates to the field of iron and steel metallurgy related equipment, in particular to an environmental protection treatment device for iron and steel metallurgy waste gas. Background Art

[0002] Iron and steel metallurgy refers to the mining, selection, sintering of iron ore, and smelting and processing it into steel materials. Waste gas is generated during the iron and steel metallurgical process. The waste gas contains a lot of dust and harmful substances. If it is directly discharged into the atmosphere, it will cause harm to the environment. The treatment of iron and steel metallurgical waste gas requires multiple processes. Among them, the dust in the waste gas is generally absorbed by spraying water in a water shower tower through pressure drop to absorb the dust particles in the waste gas.

[0003] When the traditional spray tower sprays water to reduce dust on the exhaust gas, the exhaust gas flows from bottom to top in the spray tower. Although the packing layer is used to ensure that the exhaust gas and the spray water can fully contact each other, the exhaust gas flow in the spray tower is short, so the exhaust gas in the spray tower is generally treated, and a small amount of dust will still remain in the discharged gas after treatment, resulting in unclean exhaust gas treatment, which causes pollution to the environment after the exhaust gas is discharged. Summary of the invention

[0004] The purpose of the present invention is to solve the above problems and to design an environmental protection treatment device for iron and steel metallurgical waste gas.

[0005] To achieve the above object, the present invention adopts the following technical solutions:

[0006] An environmental protection treatment device for iron and steel metallurgical waste gas, comprising a spray tower body, an annular base, an observation port, an air inlet, and an exhaust port, wherein the annular base is located below the spray tower body, a support baffle is installed between the annular base and the spray tower body, the observation port is opened above the surface of one side of the spray tower body, the air inlet is opened below the surface of the other side of the spray tower body, and the exhaust port is opened at the center above the spray tower body, and further comprises a reciprocating sleeve shaft and a spiral baffle;

[0007] The spiral baffle is located inside the spray tower body. A packing layer is provided on the spiral baffle. A number of fixed studs are installed on the inner and outer surfaces of the spiral baffle, and the fixed studs are evenly distributed. Right-angled trapezoidal seats are provided on both the inner and outer sides of the spiral baffle. The inclined surface of the right-angled trapezoidal seat faces upward. An embedding opening is formed on one side surface of the right-angled trapezoidal seat. A stud hole is formed in the embedding opening. A nut groove is formed on the other side surface of the right-angled trapezoidal seat. A sealing gasket is installed on the other side surface of the right-angled trapezoidal seat. The inner and outer ends of the spiral baffle are embedded in the embedding opening. The fixed studs pass through the stud holes and are inserted into the nut grooves. Fixed nuts are installed on the fixed studs. A fixing groove is formed on the inclined surface of one of the right-angled trapezoidal seats. A fixing bolt is installed inside the fixing groove, and the fixing bolt is threadedly connected to the inner wall of the spray tower body. The sealing gasket on the other right-angled trapezoidal seat is slidably connected to the reciprocating sleeve shaft.

[0008] Further, a collecting cross plate is provided on the upper surface of the spiral baffle. A collecting inclined plate is installed on one side of the collecting cross plate, and the collecting inclined plate is installed on the spiral baffle. A spiral U-shaped mesh cover is provided below the spiral baffle. Mesh cover seats are installed on both sides of the spiral U-shaped mesh cover. One of the mesh cover seats is fixedly connected to the spray tower body. The spiral U-shaped mesh cover and the collecting cross plate and the collecting inclined plate are staggered. A number of groups of spray holes are formed on the spiral baffle. The number of groups of spray holes is evenly distributed below the collecting cross plate and the collecting inclined plate. Each group of spray holes is composed of a number of spray holes one and spray holes two. The number of the spray holes one and the spray holes two are distributed in a strip shape. The spray holes one and the spray holes two are staggeredly distributed.

[0009] Further, the heights of the spray holes one and the spray holes two on the spiral baffle gradually decrease and their pore diameters gradually increase.

[0010] Further, a conical top cap is installed at the upper end of the reciprocating sleeve shaft. A limiting sleeve is installed at the lower end of the conical top cap. A number of strip-shaped adjusting grooves are formed on the outer surface of the reciprocating sleeve shaft, and the strip-shaped adjusting grooves are spirally distributed. A number of sealing grooves are formed on both side surfaces of the reciprocating sleeve shaft. The sealing grooves are located on both sides of the strip-shaped adjusting grooves. The strip-shaped adjusting grooves are located at the centers of the sealing grooves. Spray short pipes are provided inside the strip-shaped adjusting grooves. Sealing baffles are slidably installed in the sealing grooves, and the sealing baffles are fixedly connected to the spray short pipes. An adjusting slider is installed at one end of the spray short pipe, and the adjusting slider is in sliding contact with the mesh cover seat and the right-angled trapezoidal seat. A spray cross pipe is installed at one end of the spray short pipe, and the spray cross pipe is located inside the spiral U-shaped mesh cover. A number of spray nozzles are installed on the lower surface of the spray cross pipe, and the spray nozzles are evenly distributed.

[0011] Further, a vertical spray pipe is provided inside the reciprocating sleeve shaft. The upper end of the vertical spray pipe is a closed end. The upper end of the vertical spray pipe is movably inserted into the limit sleeve. The vertical spray pipe is fixedly connected to the spray short pipe. A drive cavity is provided at the center of the lower surface of the spray tower body. A spray inlet pipe is provided in the drive cavity. One end of the spray inlet pipe is installed with a mechanical seal between the reciprocating sleeve shaft. The spray inlet pipe is connected to the vertical spray pipe through a spray hose. The other end of the spray inlet pipe is inserted below the side surface of the drive cavity. A circulation pump is installed on the spray inlet pipe.

[0012] Further, a reciprocating motor is installed above the inner surface of the drive cavity. A sleeve shaft bearing is installed between the reciprocating sleeve shaft and the drive cavity. Power is transmitted between the reciprocating sleeve shaft and the reciprocating motor through a gear.

[0013] Further, a filter box is provided below the inside of the spray tower body. The spray inlet pipe is located inside the filter box.

[0014] Further, an inner conical baffle is installed on the lower surface inside the spray tower body. An outer conical baffle is provided on the lower surface inside the spray tower body. The outer conical baffle is fixedly connected to the drive cavity. A sealing soft pad is provided between the outer conical baffle and the reciprocating sleeve shaft. A leak-proof conical plate is installed at the lower end of the side surface of the reciprocating sleeve shaft. The leak-proof conical plate is sleeved above the outer conical baffle.

[0015] An environmental protection treatment device for steel metallurgy waste gas made by using the technical solution of the present invention has the following beneficial effects:

[0016] In this treatment device, by setting the spiral baffle, the flow path of the waste gas inside the spray tower is increased, and the contact area between the waste gas and the spray water is increased by using the filling layer, so that the waste gas treatment is cleaner. And through the settings of the spray holes one and two, the spray effect during the waste gas treatment can be improved, making the contact between the waste gas and the spray water more sufficient, and improving the waste gas treatment effect again.

[0017] In this treatment device, by using the sliding fit of the spiral right trapezoidal seat and the mesh cover seat with the adjusting slider, the reciprocating rotation of the reciprocating sleeve shaft can drive the spray cross pipe to rotate reciprocally in the spiral C-shaped mesh cover, so as to utilize the flow of the spray water in the filling layer to increase the contact area between the waste gas and the spray water, and maximize the waste gas treatment effect.

[0018] In this treatment device, by making the aperture diameters of the spray holes one and two on the spiral baffle gradually increase, on the one hand, the flow of the spray water on the spiral baffle can be accelerated, making the spray water circulation faster, and on the other hand, the spray water amount received by the waste gas can be increased, making the waste gas treatment more efficient. Description of the Drawings

[0019] Figure 1It is a structural schematic diagram of an environmental protection treatment device for iron and steel metallurgical waste gas according to the present invention;

[0020] Figure 2 is a cross-sectional schematic diagram of the spiral baffle of the present invention;

[0021] Figure 3 Schematic diagram of spray hole 1 and spray hole 2 according to the present invention;

[0022] Figure 4 is a schematic diagram of the development of the spiral baffle of the present invention;

[0023] Figure 5 is a schematic diagram of the strip-shaped adjustment slot of the present invention;

[0024] Figure 6 The present invention Figure 1 A partial enlarged view of

[0025] In the figure, 1, spray tower body; 2, annular base; 3, observation port; 4, air inlet; 5, exhaust port; 6, support baffle; 7, reciprocating sleeve shaft; 8, spiral baffle; 9, fixing stud; 10, right-angle trapezoidal seat; 11, embedding port; 12, stud hole; 13, nut groove; 14, sealing gasket; 15, fixing nut; 16, fixing groove; 17, fixing bolt; 18, collecting horizontal plate; 19, collecting inclined plate; 20, spiral type mesh cover; 21, mesh cover seat; 22, spray hole 1; 23, spray hole 2; 2 4. Conical top cap; 25. Limit sleeve; 26. Strip adjustment groove; 27. Sealing groove; 28. Spray short pipe; 29. ​​Sealing baffle; 30. Adjusting slider; 31. Spray horizontal pipe; 32. Spray nozzle; 33. Vertical spray pipe; 34. Driving chamber; 35. Spray inlet pipe; 36. Spray hose; 37. Circulation pump; 38. Reciprocating motor; 39. Sleeve shaft bearing; 40. Filter box; 41. Inner cone baffle; 42. Outer cone baffle; 43. Sealing cushion; 44. Leak-proof cone plate; 45. Packing layer. DETAILED DESCRIPTION

[0026] The present invention will be described in detail below in conjunction with the accompanying drawings. Figure 1-6 shown.

[0027] The creative point of this solution lies in that the spiral baffle is located inside the spray tower body. There is a packing layer 45 on the spiral baffle. A number of fixed studs 9 are installed on the inner and outer surfaces of the spiral baffle, and the fixed studs are evenly distributed. Right-angled trapezoidal seats 10 are provided on the inner and outer sides of the spiral baffle. The inclined surface of the right-angled trapezoidal seat faces upward. An embedding port 11 is opened on one side surface of the right-angled trapezoidal seat. A stud hole 12 is opened inside the embedding port. A nut groove 13 is opened on the other side surface of the right-angled trapezoidal seat. A sealing gasket 14 is installed on the other side surface of the right-angled trapezoidal seat. The inner and outer ends of the spiral baffle are embedded in the embedding port. The fixed studs pass through the stud holes and are inserted into the nut grooves. Fixed nuts 15 are installed on the fixed studs. A fixing groove 16 is opened on the inclined surface of one of the right-angled trapezoidal seats. A fixing bolt 17 is installed inside the fixing groove, and the fixing bolt is threadedly connected to the inner wall of the spray tower body. The sealing gasket on the other right-angled trapezoidal seat is slidably connected to the reciprocating sleeve shaft. A collecting cross plate 18 is provided on the upper surface of the spiral baffle. A collecting inclined plate 19 is installed on one side of the collecting cross plate, and the collecting inclined plate is installed on the spiral baffle. A spiral U-shaped mesh cover 20 is provided below the spiral baffle. Mesh cover seats 21 are installed on both sides of the spiral U-shaped mesh cover. One of the mesh cover seats is fixedly connected to the spray tower body. The spiral U-shaped mesh cover and the collecting cross plate and the collecting inclined plate are staggered. A number of groups of spray holes are opened on the spiral baffle. The number of groups of spray holes is evenly distributed below the collecting cross plate and the collecting inclined plate. Each group of spray holes is composed of a number of spray holes one 22 and spray holes two 23. The number of spray holes one and spray holes two are distributed in a strip shape. The spray holes one and the spray holes two are staggeredly distributed. The height of the spray holes one and the spray holes two on the spiral baffle gradually decreases and their aperture gradually increases. Through the setting of the spiral baffle 8, the flow path of the waste gas in the spray tower body 1 can be increased, thereby increasing the residence time of the waste gas in the spray tower body 1, so that the waste gas can be fully contacted with the spray water. The setting of the packing layer 45 can increase the contact surface between the waste gas and the spray water. Through the setting of the right-angled trapezoidal seat 10, the installation of the spiral baffle 8 can be made more convenient and fast, facilitating the assembly of the equipment. Through the setting of the collecting cross plate 17 and the collecting inclined plate 19, when the spray water flows on the spiral baffle 8, the spray water can be collected. Through the setting of the spray holes one 22 and the spray holes two 23, the spray water can flow onto the packing layer 45 below, so that the spray water can be fully contacted with the waste gas, increasing the total amount of the waste gas sprayed by the spray water to ensure the cleanliness of the waste gas treatment. The gradually increasing aperture of the spray holes one 22 and the spray holes two 23 can facilitate the circulation of the spray water and at the same time ensure that the spray water is more fully contacted with the waste gas when flowing.

[0028] The creative point of this solution lies in that a conical top cap 24 is installed at the upper end of the reciprocating sleeve shaft, a limiting sleeve 25 is installed at the lower end of the conical top cap, several strip-shaped adjustment grooves 26 are formed on the outer surface of the reciprocating sleeve shaft, the strip-shaped adjustment grooves are spirally distributed, several sealing grooves 27 are formed on the side surfaces of both sides of the reciprocating sleeve shaft, the sealing grooves are located on both sides of the strip-shaped adjustment grooves, the strip-shaped adjustment grooves are located at the center of the sealing grooves, a spray short pipe 28 is arranged inside the strip-shaped adjustment groove, a sealing baffle 29 is slidably installed in the sealing groove, the sealing baffle is fixedly connected with the spray short pipe, an adjustment slider 30 is installed at one end of the spray short pipe, the adjustment slider is in sliding contact with the mesh cover seat and the right-angled trapezoid seat, a spray cross pipe 31 is installed at one end of the spray short pipe, the spray cross pipe is located inside the spiral C-shaped mesh cover, several spray nozzles 32 are installed on the lower surface of the spray cross pipe, the spray nozzles are evenly distributed, a vertical spray pipe 33 is arranged inside the reciprocating sleeve shaft, the upper end of the vertical spray pipe is a closed end, the upper end of the vertical spray pipe is movably inserted into the limiting sleeve, the vertical spray pipe is fixedly connected with the spray short pipe, a driving cavity 34 is arranged at the center of the lower surface of the spray tower body, a spray inlet pipe 35 is arranged in the driving cavity, a mechanical seal is installed between one end of the spray inlet pipe and the reciprocating sleeve shaft, the spray inlet pipe is connected with the vertical spray pipe through a spray hose 36, the other end of the spray inlet pipe is inserted below the side surface of the driving cavity, and a circulating pump 37 is installed on the spray inlet pipe; through the setting of the strip-shaped adjustment groove 26 and the setting of the adjustment slider 30, when the reciprocating sleeve shaft 7 rotates reciprocally, the spray cross pipe 31 can be automatically adjusted according to the position of the spiral baffle 7, so as to perform reciprocating spraying on the waste gas, which can make the waste gas fully contact with the spraying water and avoid the problem of poor spraying effect of the waste gas caused by the fixed spraying position. And through the setting of the sealing groove 27 and the sealing baffle 29, the strip-shaped adjustment groove 26 can be in a closed state to prevent the waste gas from entering the reciprocating sleeve shaft 7. At the same time, the sealing of the reciprocating sleeve shaft 7 can also reduce the waste gas from entering the reciprocating sleeve shaft 7, so as to ensure the smooth purification of the waste gas. The setting of the spray hose 36 can, on the one hand, enable the vertical spray pipe 33 to rotate and adjust along with the reciprocating sleeve shaft 7, and on the other hand, utilize the length of the spray hose 36 to enable the vertical spray pipe 33 to perform height adjustment and ensure the smooth transportation of the spraying water.

[0029] The creative point of this solution lies in that an inner conical baffle 41 is installed on the lower surface inside the spray tower body, an outer conical baffle 42 is arranged on the lower surface inside the spray tower body, the outer conical baffle is fixedly connected with the driving cavity, a sealing soft pad 43 is arranged between the outer conical baffle and the reciprocating sleeve shaft, and a leak-proof conical plate 44 is installed at the lower end of the side surface of the reciprocating sleeve shaft, and the leak-proof conical plate is sleeved above the outer conical baffle; through the setting of the inner conical baffle 41 and the outer conical baffle 42, the reflux of the spraying water can be facilitated. And through the setting of the leak-proof conical plate 44 and the sealing soft pad 43, on the one hand, the rotation of the reciprocating sleeve shaft 7 can be ensured, and on the other hand, the leakage of the spraying water to the upper part of the driving cavity 34 can be avoided.

[0030] During the implementation of this technical solution, those skilled in the art need to connect all electrical components in this case to an external power supply mechanism, and should select a suitable controller according to the actual situation to meet the control requirements. For the specific connection and control sequence, reference should be made to the sequence of operations among the electrical components in the following working principle to complete the electrical connection. The detailed connection means are well-known techniques in this field. The following mainly introduces the working principle and process, and will not explain the electrical control.

[0031] This technical solution mainly aims at the problem that in the existing spray tower for treating waste gas, due to the short flow path of the waste gas in the spray tower, the waste gas cannot be treated cleanly.

[0032] When the waste gas enters above the spray tower body 1 through the air inlet 4, at this time, through the pumping of an external fan, the waste gas flows upward from bottom to top inside the spray tower body 1, and then the waste gas starts to rise in a spiral along the spiral baffle 8. At the same time, the packing layer 45 inside the spiral baffle causes the waste gas to start flowing along the gaps of the packing layer 45.

[0033] At the same time, control the reciprocating motor 38 and the circulation pump 37 to start working. The work of the circulation pump 37 causes the spray inlet pipe 35 to start pumping spray water from below the inside of the spray tower body 1, and then输送 it to the vertical spray pipe 33 through the spray hose 36, and then to the spray cross pipe 31 through the spray short pipe 28. Subsequently, it is sprayed into the spiral U-shaped mesh cover 20 by the spray nozzle 32, and the spray water flows onto the packing layer 45 through the spiral U-shaped mesh cover 20. Then, as the spray water flows downward, the spray water flows onto the spiral baffle 8, and through the collection of the collection cross plate 18 and the collection inclined plate 19, the spray water is retained on the spiral baffle 8. Then, the spray water is flowed onto the packing layer 45 at the lower position through the spray holes one 22 and the spray holes two 23. At the same time, the positions of the spray holes one 22 and the spray holes two 23 on the spiral baffle 8 gradually decrease and their apertures gradually increase, so that although the spray water gradually descends along the spiral baffle 8 and its water volume gradually increases, due to the gradually increasing apertures of the spray holes one 22 and the spray holes two 23, the flow rate of the spray water is accelerated, thus ensuring the circulation speed of the spray water.

[0034] The operation of the reciprocating motor 38 is to make the reciprocating sleeve shaft 7 reciprocate at a certain angle through the transmission of the gears. During the reciprocating rotation of the reciprocating sleeve shaft 7, the reciprocating sleeve shaft 7 drives the spray cross pipe 31 to reciprocate. Since the spiral baffle 8 is in a fixed state, during the rotation of the spray cross pipe 31, the adjusting slider 30 makes sliding contact with the spirally distributed right-angled trapezoidal seat 10 and the mesh cover seat 21, so that the adjusting slider 30 is height-adjusted along the spiral of the right-angled trapezoidal seat 10 and the mesh cover seat 21, thereby driving the spray cross pipe 31 to adjust its height, so that the spray cross pipe 31 is height-adjusted along the lower surface of the spiral baffle 8 and rotates at the same time, so that the spray nozzle 32 reciprocates to spray water, and then the packing layer 45 below the spiral type mesh cover 20 can be sprayed with water by the spray nozzle 32 in a reciprocating manner.

[0035] As the waste gas enters the spray tower body 1, the waste gas is first sprayed by the spray water flowing out of the spiral baffle 8, and then sprayed by the spray water flowing out of the spray hole 1 22 and the spray hole 23, so that the waste gas is initially purified. Then the waste gas enters the spiral baffle 8 and rises along the spiral baffle 8. At the same time, it is blocked by the packing layer 45, so that the waste gas flows upward in a spiral along the gap of the packing layer 45. In the process of the waste gas flowing upward in a spiral, the waste gas is sprayed by the reciprocating spray of the spray nozzle 32, and also by the spray water flowing out of the spray hole 1 22 and the spray hole 23. In the process of the waste gas rising in a spiral, the waste gas is sprayed by a large amount of spray water, so that the spray water is fully in contact with the waste gas, thereby efficiently purifying the waste gas.

[0036] After the spray water contacts the exhaust gas, it flows to the bottom of the spiral baffle 8, and then is collected by the inner cone baffle 41 and the outer cone baffle 42, so that the spray water flows back to the bottom of the spray tower body 1. When the spray water enters the spray inlet pipe 35, it can be filtered by the filter material inside the filter box 40, thereby preventing dirt from flowing into the spray inlet pipe 35 with the spray water.

[0037] In order to prevent the spray water from flowing onto the top of the drive box 34 during the circulation of the spray water, the leak-proof conical plate 44 and the sealing cushion 43 are provided, which can prevent the leakage of the spray water on the one hand and ensure the smooth reciprocating rotation of the reciprocating sleeve shaft 7 on the other hand.

[0038] By increasing the flow rate of the exhaust gas in the spray tower body 1, the residence time of the exhaust gas in the spray tower body 1 is increased, thereby ensuring the cleanliness of the exhaust gas treatment in the spray tower body 1, and utilizing the reciprocating spraying of the spray nozzle 32 on the spray cross pipe 31 to spray water, and at the same time utilizing the spray hole 1 22 and the spray hole 2 23 to collect and discharge the spray water flowing on the surface of the spiral baffle 8, so that the exhaust gas is fully in contact with the spray water during the upward spiral flow, thereby ensuring the cleanliness of the exhaust gas treatment.

[0039] The above technical solutions only reflect the preferred technical solutions of the technical solutions of the present invention. Some changes that may be made to certain parts thereof by technicians in this technical field all reflect the principles of the present invention and fall within the protection scope of the present invention.

Claims

1. An environmental protection treatment device for iron and steel metallurgical waste gas, comprising a spray tower body (1), an annular base (2), an observation port (3), an air inlet (4), and an exhaust port (5), wherein the annular base is located below the spray tower body, a support baffle (6) is installed between the annular base and the spray tower body, the observation port is opened above the surface of one side of the spray tower body, the air inlet is opened below the surface of the other side of the spray tower body, and the exhaust port is opened at the center above the spray tower body, characterized in that: It also includes a reciprocating sleeve shaft (7) and a spiral baffle (8); The spiral baffle is located inside the spray tower body. A packing layer (45) is provided on the spiral baffle. A number of fixing studs (9) are installed on the inner and outer surfaces of the spiral baffle, and the fixing studs are evenly distributed. Right-angled trapezoidal seats (10) are provided on the inner and outer sides of the spiral baffle. The inclined surface of the right-angled trapezoidal seat faces upward. An embedding opening (11) is formed on one side surface of the right-angled trapezoidal seat. A stud hole (12) is formed in the embedding opening. A nut groove (13) is formed on the other side surface of the right-angled trapezoidal seat. A gasket (14) is installed on the other side surface of the right-angled trapezoidal seat. The inner and outer ends of the spiral baffle are embedded in the embedding opening. The fixing studs pass through the stud holes and are inserted into the nut grooves. Fixing nuts (15) are installed on the fixing studs. A fixing groove (16) is formed on the inclined surface of one of the right-angled trapezoidal seats. A fixing bolt (17) is installed inside the fixing groove, and the fixing bolt is threadedly connected to the inner wall of the spray tower body. The gasket on the other right-angled trapezoidal seat is slidably connected to the reciprocating sleeve shaft; A collecting cross plate (18) is provided on the upper surface of the spiral baffle. A collecting inclined plate (19) is installed on one side of the collecting cross plate, and the collecting inclined plate is installed on the spiral baffle. A spiral U-shaped mesh cover (20) is provided below the spiral baffle. Mesh cover seats (21) are installed on both sides of the spiral U-shaped mesh cover. One of the mesh cover seats is fixedly connected to the spray tower body. The spiral U-shaped mesh cover and the collecting cross plate and the collecting inclined plate are staggered. A number of groups of spray holes are formed on the spiral baffle. The number of groups of spray holes are evenly distributed below the collecting cross plate and the collecting inclined plate. Each group of spray holes is composed of a number of spray holes one (22) and spray holes two (23). A number of the spray holes one and the spray holes two are distributed in a strip shape, and the spray holes one and the spray holes two are staggeredly distributed; A conical top cap (24) is installed at the upper end of the reciprocating sleeve shaft. A limiting sleeve (25) is installed at the lower end of the conical top cap. A number of strip-shaped adjusting grooves (26) are formed on the outer surface of the reciprocating sleeve shaft, and the strip-shaped adjusting grooves are spirally distributed. A number of sealing grooves (27) are formed on both side surfaces of the reciprocating sleeve shaft. The sealing grooves are located on both sides of the strip-shaped adjusting grooves, and the strip-shaped adjusting grooves are located at the center of the sealing grooves. A spray short pipe (28) is provided inside the strip-shaped adjusting grooves. A sealing baffle (29) is slidably installed in the sealing grooves, and the sealing baffle is fixedly connected to the spray short pipe. An adjusting slider (30) is installed at one end of the spray short pipe. The adjusting slider is in sliding contact with the mesh cover seat and the right-angled trapezoidal seat. A spray cross pipe (31) is installed at one end of the spray short pipe. The spray cross pipe is located inside the spiral U-shaped mesh cover. A number of spray nozzles (32) are installed on the lower surface of the spray cross pipe, and the spray nozzles are evenly distributed; A vertical spray pipe (33) is provided inside the reciprocating sleeve shaft, the upper end of the vertical spray pipe is a closed opening, the upper end of the vertical spray pipe is movably inserted in the limiting sleeve, the vertical spray pipe is fixedly connected to the spray short pipe, a driving cavity (34) is provided at the center of the lower surface of the spray tower body, a spray inlet pipe (35) is provided in the driving cavity, a mechanical seal is installed between one end of the spray inlet pipe and the reciprocating sleeve shaft, the spray inlet pipe and the vertical spray pipe are connected via a spray hose (36), the other end of the spray inlet pipe is inserted below the side surface of the driving cavity, and a circulating pump (37) is installed on the spray inlet pipe.

2. The environmental protection treatment device for iron and steel metallurgical waste gas according to claim 1 is characterized in that: The heights of the spray hole 1 and the spray hole 2 on the spiral baffle gradually decrease, and their apertures gradually increase.

3. The environmental protection treatment device for iron and steel metallurgical waste gas according to claim 1 is characterized in that: A reciprocating motor (38) is installed above the inner surface of the driving cavity, a sleeve shaft bearing (39) is installed between the reciprocating sleeve shaft and the driving cavity, and power is transmitted between the reciprocating sleeve shaft and the reciprocating motor via gears.

4. The environmental protection treatment device for iron and steel metallurgical waste gas according to claim 1 is characterized in that: A filter box (40) is provided at the lower part of the spray tower body, and the spray inlet pipe is located in the filter box.

5. The environmental protection treatment device for iron and steel metallurgical waste gas according to claim 1 is characterized in that: An inner cone baffle (41) is installed on the lower surface of the interior of the spray tower body, an outer cone baffle (42) is provided on the lower surface of the interior of the spray tower body, the outer cone baffle is fixedly connected to the driving chamber, a sealing cushion (43) is provided between the outer cone baffle and the reciprocating sleeve shaft, a leakproof cone plate (44) is installed on the lower end of the side surface of the reciprocating sleeve shaft, and the leakproof cone plate is sleeved on the outer cone baffle.

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