Waste gas treatment device for iron-making blast furnace

Abstract

The invention relates to the technical field of blast furnace waste gas treatment, and provides an ironmaking blast furnace waste gas treatment device which comprises a tower body, a gas inlet pipe, a gas outlet pipe, a pretreatment box, a spray head, a drainage cylinder and a spinning disk, the gas inlet pipe and the gas outlet pipe are both arranged on the tower body, the pretreatment box is arranged on the gas inlet pipe and provided with an inlet and an outlet, and the outlet is communicated with the gas inlet pipe; the spraying head is arranged in the pretreatment box, the drainage cylinder is vertically arranged in the pretreatment box and located below the spraying head, the spinning disk is arranged on the inner wall of the pretreatment box and located between the pretreatment box and the drainage cylinder, a spiral spinning channel is formed among the spinning disk, the inner wall of the pretreatment box and the outer wall of the drainage cylinder, and the inlet is communicated with the spinning channel. And the waste gas is discharged between the spraying head and the water discharging cylinder in a vortex shape. According to the technical scheme, the problems that in the prior art, the smoke content of iron-making blast furnace waste gas is large, consequently, mud is prone to being accumulated on the bottom face of the first filler layer at the lowermost layer, and the waste gas treatment efficiency is affected are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of blast furnace waste gas treatment, and in particular to a device for treating waste gas from an ironmaking blast furnace. Background Art

[0002] In the modern steel industry, ironmaking blast furnaces are important production equipment. However, the waste gas they produce contains a large amount of harmful substances, such as dust, sulfur dioxide, nitrogen oxides, etc., which pose a serious threat to the environment and human health. Therefore, waste gas treatment has become an indispensable part of the steel production process.

[0003] Among the traditional waste gas treatment methods, it is more common to pile up fillers in a tower and install a spray assembly above the fillers. This method is based on the principle of gas-liquid offset, and uses the interaction between mist absorption liquid and rising waste gas to make the waste gas react with the chemical substances in the liquid, thereby achieving the purification of the waste gas. Each filler itself has a certain tortuous structure, and common shapes are cylinders or spheres. The structure of the filler itself, combined with the gaps between the stacked fillers, can effectively divide the waste gas flow, greatly increasing the gas-liquid contact area and contact time; the filler layer is generally designed to be multi-layered, and the treatment effect is further enhanced through multi-stage spraying. In theory, it can effectively remove a variety of pollutants in the waste gas.

[0004] However, the exhaust gas from iron-making blast furnaces has its own particularity, among which the smoke content is extremely high. In the actual operation process, since the exhaust gas first contacts the bottom surface of the first layer of filler at the bottom of the tower body, the first layer of filler will filter out most of the smoke in the exhaust gas, but at the same time, the smoke is also easy to gather in this area and react with the absorption liquid to form mud, while the mud accumulation phenomenon of the fillers in other layers is relatively light. As time goes by, the mud on the bottom surface of the first layer of filler at the bottom gradually accumulates. On the one hand, it seriously hinders the upward flow path of the exhaust gas, making the exhaust gas unevenly distributed in the tower, and the local air flow speed slows down or even stagnates, greatly reducing the efficiency of the gas-liquid reaction; on the other hand, the mud also interferes with the normal dripping of the liquid downward, causing the liquid to deflect and accumulate in the filler layer, affecting the wetting performance and mass transfer effect of the entire filler layer. Moreover, since the filler is installed in the tower body, it makes cleaning difficult, facing problems such as large workload, time-consuming and labor-intensive, and possible damage to the equipment.

[0005] Therefore, there is an urgent need for a new type of ironmaking blast furnace exhaust gas treatment device to solve these problems existing in the prior art, so as to improve the exhaust gas treatment efficiency and the stability of the device and meet increasingly stringent environmental protection requirements. Summary of the invention

[0006] The present invention provides an iron-making blast furnace exhaust gas treatment device, which solves the problem in the related art that the exhaust gas from the iron-making blast furnace has a large smoke dust content, which causes mud and dirt to easily accumulate on the bottom surface of the first layer of filler at the bottom, affecting the exhaust gas treatment efficiency.

[0007] The technical solution of the present invention is as follows: A blast furnace waste gas treatment device comprises a tower body, an air inlet pipe, an air outlet pipe, a pretreatment box, a spray head, a drainage tube and a swirl plate, wherein the air inlet pipe and the air outlet pipe are both arranged on the tower body, the pretreatment box is arranged on the air inlet pipe, the pretreatment box has an inlet and an outlet, the outlet is connected to the air inlet pipe, the spray head is arranged in the pretreatment box, and the drainage tube is vertically arranged in the pretreatment box and is located below the spray head.

[0008] The swirl plate is arranged on the inner wall of the pretreatment box and is located between the pretreatment box and the drainage cylinder. A spiral swirl channel is formed between the swirl plate, the inner wall of the pretreatment box and the outer wall of the drainage cylinder. The inlet is connected to the swirl channel to discharge the exhaust gas in a vortex shape between the sprinkler head and the drainage cylinder.

[0009] Optionally, the pretreatment box includes a small diameter section and a large diameter section from top to bottom, the spray head is located in the small diameter section, the drainage tube is located in the large diameter section, and the diameter of the small diameter section is smaller than the diameter of the drainage tube.

[0010] Optionally, it also includes a filter cover, a filter element and a water collecting box, the filter cover is detachably arranged at the bottom of the drainage cylinder, the filter element is arranged in the filter cover, and the water collecting box is arranged below the drainage cylinder.

[0011] Optionally, it also includes a liquid inlet pipe, a rotating frame, a branch pipe, a rotating joint and an atomizing nozzle, wherein the liquid inlet pipe is arranged through the side wall of the tower body, the rotating frame is rotatably arranged in the tower body, the branch pipe is arranged on the rotating frame, the branch pipe is connected to the liquid inlet pipe by means of the rotating joint through a rotation seal, and the atomizing nozzle is arranged on the branch pipe and is plural.

[0012] Optionally, it also includes a motor, a driving gear and a driven gear ring, the motor is arranged on the outer wall of the tower body, the driving shaft of the motor penetrates into the tower body, the driving gear is coaxially arranged on the driving shaft of the motor, the driven gear ring is arranged on the rotating frame, and the driving gear is meshed with the driven gear ring.

[0013] Optionally, it further includes a packing layer, which includes a containing basket and a packing body. The containing basket is arranged to be lifted and slidable relative to the tower body and is located inside the tower body. The packing body is filled in the containing basket and is in plurality.

[0014] Optionally, the containing basket is cylindrical and hollow inside, and the top wall and side walls of the containing basket both have mesh holes.

[0015] Optionally, it also includes a support and a spring, wherein the support is arranged on the inner wall of the tower body, and two ends of the spring act on the containing basket and the support respectively, and the spring is arranged on the upper and lower parts of the containing basket.

[0016] Optionally, it also includes a support rod, a pressure roller and a pressure-bearing inclined block, the support rod is arranged on the rotating frame, the pressure roller is rotatably arranged at the bottom end of the support rod, and the pressure-bearing inclined block is arranged on the top of the containing basket. After the rotating frame drives the support rod to rotate, the pressure roller is used to contact and press down the pressure-bearing inclined block. After the pressure roller loses contact with the pressure-bearing inclined block, the spring releases elastic potential energy to make the containing basket jump up and down.

[0017] Optionally, a shock-absorbing pad is also included, and the shock-absorbing pad is filled between the inner wall of the tower body and the support.

[0018] The working principle and beneficial effects of the present invention are: During the operation of the iron-making blast furnace waste gas treatment device, the waste gas generated by the blast furnace first enters the pretreatment box through the inlet, and the spray head located above the pretreatment box begins to spray the dust washing liquid downward. The waste gas enters the swirl channel from the inlet. Due to the effect of the swirl sheet, the waste gas rises rapidly in a spiral along the swirl channel, and after rising to the bottom of the spray head, it fully offsets the dust washing liquid sprayed from the spray head. In this process, most of the smoke in the waste gas contacts and is captured by the dust washing liquid. The liquid after dust washing drips downward and gathers in the drainage cylinder located below the spray head, and then is discharged to the outside through the drainage cylinder. The waste gas after preliminary dust washing in the pretreatment box enters the tower body through the air inlet pipe, and undergoes further chemical reactions with the absorption liquid in the tower body to remove other harmful substances. Finally, the purified gas is discharged from the outlet pipe, which is connected to the external fan.

[0019] By adding a pre-treatment box to pre-clean the waste gas, the dust content of the waste gas entering the tower body is effectively reduced. In the pre-treatment box, the swirl channel formed by the swirl plate makes the waste gas spiral upward and accelerates the flow rate, which significantly improves the gas-liquid impact effect and dust washing efficiency, and can remove a large amount of smoke in the waste gas, thereby avoiding the problems of hindering the upward flow of waste gas, interfering with the downward dripping of liquid, and reducing the efficiency of gas-liquid reaction caused by the accumulation of smoke on the bottom surface of the first layer of packing in the tower body.

[0020] In addition, the exhaust gas in the tower body needs to react chemically with the absorption liquid, so the exhaust gas flow rate should not be too fast. In the pretreatment box, the purpose is only to wash the dust, so the exhaust gas flow rate can be increased and a swirl can be formed to improve the dust washing effect. The exhaust gas flow rate can be flexibly adjusted according to the dust washing needs and a swirl can be formed, which improves the treatment effect of the exhaust gas and helps to ensure the environmental friendliness and sustainability of the steel production process.

[0021] By introducing high-speed cyclonic exhaust gas into the pretreatment box, the dust washing effect can be increased, and most of the smoke and dust in the exhaust gas can be removed; while the tower body mainly achieves the purification effect through the chemical reaction between the absorption liquid and the exhaust gas, and removes harmful substances in the exhaust gas. The pretreatment box and the tower body have clear division of labor and clear treatment targets, which greatly improves the efficiency of exhaust gas treatment. The pretreatment box is small in size and located outside the tower body, which is convenient for cleaning mud and equipment maintenance, reducing the difficulty and workload of maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The preferred implementation modes will be described below in a clear and understandable manner with reference to the accompanying drawings to further illustrate the above-mentioned characteristics, technical features, advantages and implementation methods of the present invention.

[0023] Figure 1 It is a structural schematic diagram of an iron-making blast furnace waste gas treatment device; Figure 2 It is a schematic diagram of the structure of the tower; Figure 3 It is a structural schematic diagram of the pretreatment box; Figure 4 This is a schematic diagram of the structure inside the tower; Figure 5 is a schematic diagram of the structure of the sprinkler head; Figure 6 It is a structural schematic diagram of the top of the rotating frame; Figure 7 It is a structural schematic diagram of the bottom of the rotating frame; Figure 8 is a structural diagram of the support; Fig. 9 is a schematic diagram of the structure of the packing layer; Fig.10 Schematic diagram of the structure of the filler body.

[0024] In the figure: 1, tower body, 101, air inlet pipe, 102, air outlet pipe, 2, pretreatment box, 3, spray head, 4, drainage cylinder, 5, swirl plate, 201, inlet, 202, outlet, 6, swirl channel, 203, small diameter section, 204, large diameter section, 7, filter cover, 8, filter element, 9, water collecting box, 10, liquid inlet pipe, 11, rotating frame, 12, branch pipe, 13, rotating joint, 14, atomizing nozzle, 15, motor, 16, driving gear, 17, driven gear ring, 18, packing layer, 1801, containing basket, 1802, packing body, 1803, mesh, 19, support, 20, spring, 21, support rod, 22, pressure roller, 23, pressure-bearing inclined block, 24, shock-absorbing pad. DETAILED DESCRIPTION

[0025] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the specific implementation methods of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings and other implementation methods can be obtained based on these drawings without creative work.

[0026] In order to simplify the drawings, only the parts related to the invention are schematically shown in each figure, and they do not represent the actual structure of the product. In addition, in order to simplify the drawings and facilitate understanding, in some figures, only one of the parts with the same structure or function is schematically shown, or only one of them is marked. In this article, "one" not only means "only one", but also means "more than one", and "several" includes "two" and "more than two".

[0027] In this document, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0028] In addition, in the description of the present application, the terms "first", "second", etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0029] Reference Figure 1 to Figure 10, which is the first embodiment of the present invention, proposes an iron-making blast furnace waste gas treatment device, including a tower body 1, an air inlet pipe 101, an air outlet pipe 102, a pretreatment box 2, a spray head 3, a drainage tube 4 and a swirl sheet 5, the air inlet pipe 101 and the air outlet pipe 102 are both arranged on the tower body 1, the pretreatment box 2 is arranged on the air inlet pipe 101, the pretreatment box 2 has an inlet 201 and an outlet 202, the outlet 202 is connected to the air inlet pipe 101, the spray head 3 is arranged in the pretreatment box 2, and the drainage tube 4 is vertically arranged in the pretreatment box 2 and is located below the spray head 3.

[0030] The swirl plate 5 is arranged on the inner wall of the pretreatment box 2 and is located between the pretreatment box 2 and the drainage tube 4. A spiral swirl channel 6 is formed between the swirl plate 5, the inner wall of the pretreatment box 2 and the outer wall of the drainage tube 4. The inlet 201 is connected to the swirl channel 6, which is used to discharge the exhaust gas in a vortex shape to between the sprinkler head 3 and the drainage tube 4.

[0031] In this embodiment, during the operation of the ironmaking blast furnace waste gas treatment device, the waste gas generated by the blast furnace first enters the pretreatment box 2 through the inlet 201, and the spray head 3 located above the pretreatment box 2 begins to spray the dust washing liquid downward, and the waste gas enters the swirl channel 6 from the inlet 201. Due to the effect of the swirl sheet 5, the waste gas rises rapidly in a spiral along the swirl channel 6, and after rising to the bottom of the spray head 3, it fully offsets the dust washing liquid sprayed from the spray head 3. In this process, most of the smoke in the waste gas contacts and is captured by the dust washing liquid, and the dust-washed liquid drips downward and gathers in the drainage tube 4 located below the spray head 3, and then is discharged to the outside through the drainage tube 4. The waste gas after preliminary dust washing in the pretreatment box 2 enters the tower body 1 through the air inlet pipe 101, and further chemically reacts with the absorption liquid in the tower body 1 to remove other harmful substances. Finally, the purified gas is discharged from the outlet pipe 102, and the outlet pipe 102 is connected to the external fan.

[0032] By adding a pre-treatment box 2 to pre-clean the waste gas, the smoke content of the waste gas entering the tower body 1 is effectively reduced. In the pre-treatment box 2, the swirl channel 6 formed by the swirl sheet 5 makes the waste gas spiral upward and accelerates the flow rate, which significantly improves the gas-liquid impact effect and the dust washing efficiency, and can remove a large amount of smoke in the waste gas, thereby avoiding the problems of hindering the upward flow of waste gas, interfering with the downward dripping of liquid, and reducing the gas-liquid reaction efficiency caused by the accumulation of smoke on the bottom surface of the first layer of filler in the tower body 1.

[0033] In addition, in the tower body 1, the waste gas needs to react chemically with the absorption liquid, so the waste gas flow rate should not be too fast, while in the pretreatment box 2, the purpose is only to wash dust, so the waste gas flow rate can be increased and a swirl can be formed to improve the dust washing effect. The waste gas flow rate can be flexibly adjusted and a swirl can be formed according to the dust washing needs, which improves the waste gas treatment effect and helps to ensure the environmental friendliness and sustainability of the steel production process.

[0034] By introducing high-speed cyclonic exhaust gas into the pretreatment box 2, the dust washing effect is increased, and most of the smoke and dust in the exhaust gas can be removed; while the tower body 1 mainly achieves the purification effect through the chemical reaction between the absorption liquid and the exhaust gas, and removes harmful substances in the exhaust gas. The pretreatment box 2 and the tower body 1 have clear division of labor and clear treatment targets, which greatly improves the efficiency of exhaust gas treatment. The pretreatment box 2 is small in size and located outside the tower body 1, which is convenient for cleaning mud and equipment maintenance, reducing the difficulty and workload of maintenance.

[0035] Furthermore, the pretreatment box 2 includes a small diameter section 203 and a large diameter section 204 from top to bottom, the spray head 3 is located in the small diameter section 203, the drainage tube 4 is located in the large diameter section 204, and the diameter of the small diameter section 203 is smaller than the diameter of the drainage tube 4.

[0036] In this embodiment, in the pretreatment box 2, the spray head 3 continuously sprays the dust washing liquid downward to form water mist. Since the pretreatment box 2 is divided into a small diameter section 203 and a large diameter section 204 from top to bottom, and the spray head 3 is located in the small diameter section 203, when the water mist contacts the inner wall of the small diameter section 203, it will slide down along the inner wall under the action of gravity. Because the diameter of the small diameter section 203 is smaller than the diameter of the drain cylinder 4, and the drain cylinder 4 is located in the large diameter section 204, the sliding water mist will naturally drip into the drain cylinder 4 below, and will not fall into other areas outside the drain cylinder 4.

[0037] This structural design ensures that the water mist sprayed by the spray head 3 can accurately fall into the drainage tube 4 after fully contacting with the exhaust gas for dust washing. It avoids the water mist falling outside the drainage tube 4, which may cause water and liquid accumulation inside the pretreatment box 2, prevents equipment corrosion caused by water accumulation, and is conducive to the centralized collection and subsequent treatment of dust washing liquid.

[0038] Furthermore, it also includes a filter cover 7, a filter element 8 and a water collecting box 9. The filter cover 7 is detachably arranged at the bottom of the drainage tube 4, the filter element 8 is arranged in the filter cover 7, and the water collecting box 9 is arranged below the drainage tube 4.

[0039] In this embodiment, the connection mode between the filter cover 7 and the drain cylinder 4 can be threaded connection, and the filter element 8 can be a filter screen.

[0040] After the exhaust gas passes through the dust washing process in the pre-treatment box 2 , the dust washing liquid carries part of the impurities and drips downward into the drainage tube 4 .

[0041] When the liquid flows through the filter cover 7, large-size impurities are intercepted by the filter element 8, and the liquid after preliminary filtration drips into the water collection tank 9 below for collection. When the filter element 8 needs to be cleaned or replaced, the filter cover 7 can be easily removed from the bottom of the drain tube 4, the filter element 8 can be cleaned or replaced, and then reinstalled to the bottom of the drain tube 4.

[0042] By providing a filter cover 7, a filter element 8 and a water collecting tank 9, the liquid after dust washing can be effectively filtered. The filter element 8 can intercept large particles of impurities in the liquid to prevent these impurities from entering the subsequent processing links with the liquid or being directly discharged into the environment to cause pollution. The detachable filter cover 7 design greatly facilitates the maintenance and replacement of the filter element 8, ensuring the continued effectiveness of the filtration system. The water collecting tank 9 can centrally collect the filtered liquid, which is convenient for subsequent processing or disposal of the liquid, which is beneficial to improving the environmental protection and resource recycling of the entire waste gas treatment system, and also helps to extend the service life of the equipment, reduce equipment failures caused by impurity accumulation, and ensure stable and efficient operation of the waste gas treatment device.

[0043] Furthermore, it also includes a liquid inlet pipe 10, a rotating frame 11, a branch pipe 12, a rotating joint 13 and an atomizing nozzle 14. The liquid inlet pipe 10 is arranged through the side wall of the tower body 1, the rotating frame 11 is rotatably arranged in the tower body 1, the branch pipe 12 is arranged on the rotating frame 11, and the branch pipe 12 is connected to the liquid inlet pipe 10 by means of the rotating joint 13. The atomizing nozzle 14 is arranged on the branch pipe 12 and there are multiple of them.

[0044] Furthermore, it also includes a motor 15, a driving gear 16 and a driven ring gear 17. The motor 15 is arranged on the outer wall of the tower body 1, and the driving shaft of the motor 15 penetrates into the tower body 1. The driving gear 16 is coaxially arranged on the driving shaft of the motor 15, and the driven ring gear 17 is arranged on the rotating frame 11, and the driving gear 16 is meshed with the driven ring gear 17.

[0045] In this embodiment, during the waste gas treatment process, the external absorption liquid is transported into the tower body 1 through the liquid inlet pipe 10. The liquid inlet pipe 10 penetrates from the side wall of the tower body 1, one end of which is connected to the external device for providing absorption liquid, and the other end is connected to the branch pipe 12 on the rotating frame 11 through a rotating joint 13 to achieve a rotating seal. The rotating frame 11 starts to rotate under the power drive, driving the branch pipe 12 to rotate together. The multiple atomizing nozzles 14 installed on the branch pipe 12 make circular motions as the branch pipe 12 rotates, and the atomizing nozzles 14 spray the absorption liquid transported by the liquid inlet pipe 10 in an atomized state. When the waste gas in the tower body 1 rises, the absorption liquid sprayed by the atomizing nozzle 14 can meet and contact with the rising waste gas at different angles and positions, so that the absorption liquid and the waste gas can be more fully contacted and mixed.

[0046] This structural design effectively improves the contact effect between the absorption liquid and the exhaust gas. The rotating frame 11 drives the branch pipe 12 and the atomizing nozzle 14 to rotate, so that the absorption liquid can contact the exhaust gas in all directions in the tower body 1, increasing the gas-liquid contact area, thereby improving the efficiency of the chemical reaction and helping to more thoroughly remove harmful substances in the exhaust gas. Whether it is dust in the exhaust gas or pollutants such as sulfur dioxide and nitrogen oxides, they can react more fully with the absorption liquid, thereby improving the treatment effect of the entire exhaust gas treatment device, ensuring that the exhaust gas can better meet environmental emission standards after treatment, and reducing pollution to the environment.

[0047] When the exhaust gas treatment device is in operation, the motor 15 is started. The motor 15 is mounted on the outer wall of the tower body 1 and is equipped with a reducer, and its drive shaft penetrates into the tower body 1. The driving gear 16 on the drive shaft starts to rotate as the motor 15 is started. The driving gear 16 is a bevel gear and meshes with the driven ring gear 17 provided on the rotating frame 11. When the driving gear 16 rotates, the driven ring gear 17 is driven to rotate through the interaction between the teeth, and then the rotating frame 11 starts to rotate. The arrangement of the motor 15, the driving gear 16 and the driven ring gear 17 provides a stable and reliable power source for the rotation of the rotating frame 11.

[0048] Furthermore, it also includes a packing layer 18, which includes a containing basket 1801 and a packing body 1802. The containing basket 1801 is arranged to be lifted and slid relative to the tower body 1 and is located inside the tower body 1. The packing body 1802 is filled in the containing basket 1801 and is in plurality.

[0049] Furthermore, the containing basket 1801 is cylindrical and hollow inside, and the top wall and the side wall of the containing basket 1801 both have mesh holes 1803 .

[0050] In this embodiment, the packing bodies 1802 are stationary for a long time, and the accumulation becomes more and more dense, which is easy to hinder the passage of droplets and exhaust gas. In addition, once the dirt is locally accumulated, the stationary packing bodies 1802 will make the accumulation more serious and cannot be solved in time, thereby affecting the exhaust gas treatment efficiency. In this solution, a large number of packing bodies 1802 are filled in the receiving basket 1801. When the device is running, the receiving basket 1801 intermittently performs lifting and sliding movements. During this lifting process, due to the action of inertia, the packing bodies 1802 that were originally relatively stationary and accumulated in the receiving basket 1801 will jump.

[0051] After the exhaust gas passes through the pretreatment link below, it enters from the bottom of the tower body 1 and continues to flow upward into the packing layer 18 area. At the same time, the droplets sprayed by the spray head 3 also fall from top to bottom. Due to the intermittent jumping of the packing body 1802, the possible accumulation of dirt can be solved, and the exhaust gas can flow evenly between the packing bodies 1802 and fully contact with the droplets, thereby improving the utilization rate of the packing body 1802, so that the pollutants in the exhaust gas and the chemical substances in the droplets can undergo more sufficient chemical reactions and physical adsorption processes, thereby achieving efficient purification treatment.

[0052] By improving the traditional static mesh tray into a lifting and sliding receiving basket 1801 and setting mesh holes 1803 on its top wall and side walls, the stacking state of the filler body 1802 can be optimized, so that the gas-liquid contact effect is always maintained in the best state, and local blockage caused by the increasingly dense stacking of the filler bodies 1802 due to long-term stillness can be avoided. When local accumulation of dirt occurs, it can also be solved in time by optimizing the stacking state, which effectively solves the problem of the permeability of droplets and exhaust gas in the packing layer 18.

[0053] Furthermore, it also includes a support 19 and a spring 20. The support 19 is arranged on the inner wall of the tower body 1. The two ends of the spring 20 act on the containing basket 1801 and the support 19 respectively. The containing basket 1801 is provided with springs 20 at the top and bottom.

[0054] Furthermore, it also includes a support rod 21, a pressure roller 22 and a pressure-bearing inclined block 23. The support rod 21 is arranged on the rotating frame 11, the pressure roller 22 is rotatably arranged at the bottom end of the support rod 21, and the pressure-bearing inclined block 23 is arranged on the top of the receiving basket 1801. After the rotating frame 11 drives the support rod 21 to rotate, it is used to make the pressure roller 22 contact and press down the pressure-bearing inclined block 23. After the pressure roller 22 is out of contact with the pressure-bearing inclined block 23, the spring 20 releases elastic potential energy to make the receiving basket 1801 jump up and down.

[0055] Furthermore, a shock-absorbing pad 24 is included, and the shock-absorbing pad 24 is filled between the inner wall of the tower body 1 and the support 19 .

[0056] In this embodiment, when the rotating frame 11 starts to rotate under the power drive, the support rod 21 installed on the rotating frame 11 also performs circular motion. The pressure roller 22 located at the bottom end of the support rod 21 gradually approaches and contacts the pressure-bearing inclined block 23 arranged on the top of the receiving basket 1801 during the rotation process. Since the pressure-bearing inclined block 23 has a certain inclined surface structure, the pressure roller 22 will start to roll along its inclined surface after contact, and exert a downward extrusion force on the pressure-bearing inclined block 23 during the rolling process. Under the action of this extrusion force, the receiving basket 1801 starts to move downward. At this time, the spring 20 above the receiving basket 1801 is stretched, while the spring 20 below is compressed, and the spring 20 stores a certain amount of elastic potential energy. As the support rod 21 continues to rotate, when the pressure roller 22 is separated from the pressure-bearing inclined block 23, the elastic potential energy stored in the spring 20 is quickly released and converted into kinetic energy to cause the receiving basket 1801 to jump upward.

[0057] This jumping phenomenon causes the filler body 1802 inside the containing basket 1801 to jump as well. The stacking state of the filler body 1802, which may have been originally stacked more densely or had dirt accumulated, can be readjusted and optimized. The exhaust gas can flow more evenly between the filler bodies 1802 and come into more complete contact with the liquid droplets, so that the gas-liquid contact effect is always maintained in the best state, thereby promoting the purification process such as a complete chemical reaction between the pollutants in the exhaust gas and the chemicals in the liquid droplets.

[0058] The setting of the spring 20 provides elastic support and buffering for the containing basket 1801, which not only helps to maintain the relative stability of the containing basket 1801 during normal operation, but also can effectively store and release energy during the linkage process between the pressure roller 22 and the pressure-bearing inclined block 23 to drive the bouncing of the containing basket 1801. The rotating frame 11 drives the support rod 21 and the pressure roller 22 to rotate, so that the bouncing of the filler body 1802 can be performed periodically without the need for an additional complex driving device, thereby reducing the cost and complexity of the equipment. The shock-absorbing pad 24 is filled between the inner wall of the tower body 1 and the support 19, which helps to reduce the vibration and noise transmission generated when the containing basket 1801 bounces.

[0059] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. A blast furnace exhaust gas treatment device, characterized in that: The tower comprises a tower body (1), an air inlet pipe (101), an air outlet pipe (102), a pretreatment box (2), a spray head (3), a drainage cylinder (4) and a swirl sheet (5), wherein the air inlet pipe (101) and the air outlet pipe (102) are both arranged on the tower body (1), the pretreatment box (2) is arranged on the air inlet pipe (101), the pretreatment box (2) has an inlet (201) and an outlet (202), the outlet (202) is connected to the air inlet pipe (101), the spray head (3) is arranged in the pretreatment box (2), and the drainage cylinder (4) is arranged vertically in the pretreatment box (2) and is located below the spray head (3). The swirl sheet (5) is arranged on the inner wall of the pretreatment box (2) and is located between the pretreatment box (2) and the drainage cylinder (4); a spiral swirl channel (6) is formed between the swirl sheet (5), the inner wall of the pretreatment box (2) and the outer wall of the drainage cylinder (4); the inlet (201) is connected to the swirl channel (6) and is used to discharge the exhaust gas in a swirl shape to between the spray head (3) and the drainage cylinder (4).

2. The ironmaking blast furnace exhaust gas treatment device according to claim 1, characterized in that: The pretreatment box (2) comprises a small diameter section (203) and a large diameter section (204) from top to bottom, the spray head (3) is located in the small diameter section (203), the drainage cylinder (4) is located in the large diameter section (204), and the diameter of the small diameter section (203) is smaller than the diameter of the drainage cylinder (4).

3. The ironmaking blast furnace exhaust gas treatment device according to claim 2, characterized in that: It also comprises a filter cover (7), a filter element (8) and a water collecting box (9), wherein the filter cover (7) is detachably arranged at the bottom of the drainage cylinder (4), the filter element (8) is arranged in the filter cover (7), and the water collecting box (9) is arranged below the drainage cylinder (4).

4. The ironmaking blast furnace exhaust gas treatment device according to claim 1, characterized in that: The invention also comprises a liquid inlet pipe (10), a rotating frame (11), a branch pipe (12), a rotating joint (13) and an atomizing nozzle (14); the liquid inlet pipe (10) is arranged to penetrate the side wall of the tower body (1); the rotating frame (11) is rotatably arranged in the tower body (1); the branch pipe (12) is arranged on the rotating frame (11); the branch pipe (12) is connected to the liquid inlet pipe (10) in a rotating sealed manner by means of the rotating joint (13); and the atomizing nozzle (14) is arranged on the branch pipe (12) and is in plurality.

5. The ironmaking blast furnace exhaust gas treatment device according to claim 4, characterized in that: It also comprises a motor (15), a driving gear (16) and a driven gear ring (17), wherein the motor (15) is arranged on the outer wall of the tower body (1), the driving shaft of the motor (15) penetrates into the tower body (1), the driving gear (16) is coaxially arranged on the driving shaft of the motor (15), the driven gear ring (17) is arranged on the rotating frame (11), and the driving gear (16) meshes with the driven gear ring (17).

6. The ironmaking blast furnace exhaust gas treatment device according to claim 4, characterized in that: It also comprises a packing layer (18), the packing layer (18) comprising a containing basket (1801) and a packing body (1802), the containing basket (1801) being arranged to be lifted and slidable relative to the tower body (1) and being located inside the tower body (1), and the packing body (1802) being filled in the containing basket (1801) and being in plurality.

7. The iron-making blast furnace exhaust gas treatment device according to claim 6, characterized in that: The containing basket (1801) is cylindrical and hollow inside, and the top wall and side walls of the containing basket (1801) both have mesh holes (1803).

8. The ironmaking blast furnace exhaust gas treatment device according to claim 6, characterized in that: It also includes a support (19) and a spring (20), wherein the support (19) is arranged on the inner wall of the tower body (1), and two ends of the spring (20) act on the containing basket (1801) and the support (19) respectively, and the spring (20) is arranged on the upper and lower parts of the containing basket (1801).

9. The iron-making blast furnace exhaust gas treatment device according to claim 8, characterized in that: It also comprises a support rod (21), a pressure roller (22) and a pressure-bearing inclined block (23), wherein the support rod (21) is arranged on the rotating frame (11), the pressure roller (22) is rotatably arranged at the bottom end of the support rod (21), and the pressure-bearing inclined block (23) is arranged at the top of the containing basket (1801); after the rotating frame (11) drives the support rod (21) to rotate, the pressure roller (22) is used to contact and press down the pressure-bearing inclined block (23); after the pressure roller (22) is out of contact with the pressure-bearing inclined block (23), the spring (20) releases elastic potential energy to cause the containing basket (1801) to jump up and down.

10. The ironmaking blast furnace exhaust gas treatment device according to claim 8, characterized in that: It also includes a shock-absorbing pad (24), wherein the shock-absorbing pad (24) is filled between the inner wall of the tower body (1) and the support (19).

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