Cyclone pool system for treating turbid circulating water in steel plants

Abstract

This utility model discloses a cyclone pool system for treating turbid circulating water in steel plants, including a cyclone pool body and a central cyclone cylinder concentrically arranged in the cyclone pool body. A pump house for installing a pump unit is provided between the walls of the cyclone pool body and the central cyclone cylinder. A slag storage tank is provided on top of the pump house of the cyclone pool body. The slag storage tank is connected to the central cyclone cylinder through a channel for allowing filtered water in the slag storage tank to flow into the central cyclone cylinder. The cyclone pool system for treating turbid circulating water in steel plants provided by this utility model can reduce the footprint of the cyclone pool system and reduce pipeline maintenance costs, thereby reducing construction investment and operating costs.

Description

Technical Field

[0001] This utility model relates to the field of industrial wastewater treatment technology in steel plants, and specifically to a vortex pool system for treating turbid circulating water in steel plants. Background Technology

[0002] In the production process of steel enterprises, the circulating water generated in the continuous casting and rolling processes contains a large amount of iron oxide scale, metal dust, and lubricating grease. These substances need to be separated and treated by various processes to meet the water quality requirements of the casting and rolling mill production lines. Currently, the cyclone separator remains an important step in the treatment of circulating water. The circulating water flows into the cyclone separator by gravity through the iron scale ditch. Through cyclone separation, centrifugal separation, and gravity sedimentation, most of the iron oxide scale is separated. The settled iron oxide scale is then transferred to the slag pool for filtration and storage using a crane grab bucket. After filtration, it is then transported back for reuse.

[0003] In existing technologies (such as Chinese patent application number 202223143437.X), cyclone pool pump stations are generally underground structures. The pump station is located around the central cyclone cylinder of the cyclone pool, with a separate slag storage tank outside the cyclone pool. Wastewater filtered from the slag storage tank is collected in a dedicated collection tank and then piped back into the cyclone pool for treatment. This method requires a dedicated slag-grabbing area at the top of the cyclone pool, which cannot accommodate equipment or hoisting holes, resulting in low space utilization. Secondly, the separately located slag storage tank occupies a large area. Furthermore, a dedicated collection tank is needed next to the slag storage tank to collect the filtered water, further increasing land requirements. In addition, the collection tank requires a long pipe to discharge water into the cyclone pool, which is prone to blockage and has high maintenance costs. These structural problems result in high construction and operating costs for the entire steel plant's turbid circulating water treatment system.

[0004] Therefore, it is necessary to improve the design of the existing cyclone pool structure in steel plants in order to reduce the footprint of the cyclone pool system, reduce pipeline maintenance costs, and thus reduce construction investment and operating costs. Utility Model Content

[0005] In view of this, the purpose of this utility model is to provide a vortex pool system for treating turbid circulating water in steel plants. This vortex pool system can reduce the footprint of the vortex pool system and reduce pipeline maintenance costs, thereby reducing construction investment and operating costs.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a cyclone pool system for treating turbid circulating water in steel plants, comprising a cyclone pool body and a central cyclone cylinder concentrically arranged in the cyclone pool body, wherein a pump house for installing a pump unit is provided between the walls of the cyclone pool body and the central cyclone cylinder, and a slag storage tank is provided on the top of the cyclone pool body at the pump house, wherein the slag storage tank is connected to the central cyclone cylinder through a channel, the channel being used to allow filtered water in the slag storage tank to flow into the central cyclone cylinder.

[0007] Furthermore, the wall of the slag storage tank along the radial direction of the central vortex cylinder, close to the central vortex cylinder, shares the same wall with the central vortex cylinder.

[0008] Furthermore, the channel includes a connecting hole disposed on the wall of the central vortex tube, and a filter structure is provided in the connecting hole.

[0009] Furthermore, the connecting holes are arranged in multiple directions along the circumference of the central vortex tube.

[0010] Furthermore, the connecting hole is located at the intersection of the wall of the central cyclone cylinder and the bottom of the slag storage tank, and extends obliquely downward from the intersection to the inner surface of the wall of the central cyclone cylinder.

[0011] Furthermore, the bottom of the slag storage tank is a slope, which is inclined towards the connecting hole.

[0012] Furthermore, the wall of the slag storage tank along the radial direction of the central vortex cylinder, close to the side of the vortex tank body, shares the same wall with the vortex tank body.

[0013] Furthermore, the wall of the slag storage tank is higher than the ground level at a set distance, the set distance being 0.8-1.5m.

[0014] Furthermore, the pump house includes an annular support plate disposed between the central vortex cylinder and the vortex pool body, and the pump set is installed on the annular support plate.

[0015] Furthermore, the bottom of the cyclone pool is provided with a sludge zone in the shape of an inverted frustum, and the sludge zone is located directly below the central cyclone cylinder.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] This utility model provides a cyclone pool system for treating turbid circulating water in steel plants, which can reduce the footprint of the cyclone pool system and reduce pipeline maintenance costs, thereby reducing construction investment and operating costs. Specifically, by setting the pump house between the cyclone pool body and the wall of the central cyclone cylinder, and placing the slag storage tank on top of the pump house, a compact layout of the system structure is achieved, eliminating the need for additional space outside the cyclone pool to arrange the slag storage tank; and because the slag storage tank flows directly with the central cyclone cylinder, the filtered water in the slag storage tank can directly enter the central cyclone cylinder, eliminating the need for an additional water collection tank to collect the filtered water from the slag storage tank, thus effectively reducing the system's footprint requirements; at the same time, the slag storage tank being located on top of the pump house, i.e., close to the central cyclone cylinder, effectively avoids the installation of long-distance drainage pipes, thereby effectively reducing the risk of pipeline blockage and reducing subsequent pipeline maintenance costs; overall, it reduces the construction investment and operating costs of the cyclone pool.

[0018] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the cross-sectional structure of the present invention;

[0020] Figure 2 This is a top view of the structure of this utility model after removing the crane.

[0021] Attached reference numerals: 1-Swirl pool body; 101-Settling area; 2-Central swirl cylinder; 201-Connecting hole; 3-Pump set; 4-Pump room; 401-Annular support plate; 5-Slag storage pool; 501-Inclined surface; 6-Ground surface; 7-Crane; 8-Iron sheet trench; 9-Lifting passage. Detailed Implementation

[0022] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this utility model. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0023] Please see Figure 1-2 This embodiment discloses a cyclone pool system for treating turbid circulating water in a steel plant, including a cyclone pool body 1 and a central cyclone cylinder 2 concentrically arranged in the cyclone pool body 1. A pump house 4 for installing a pump set 3 is provided between the walls of the cyclone pool body 1 and the central cyclone cylinder 2. A slag storage tank 5 is provided on the top of the cyclone pool body 1 at the pump house 4. The slag storage tank 5 is connected to the central cyclone cylinder 2 through a channel. The channel is used to allow the filtered water (the liquid portion separated after the slag-water mixture has been left to stand in the slag storage tank 5 for a period of time) in the slag storage tank 5 to flow into the central cyclone cylinder 2.

[0024] Specifically, the central cyclone 2 and the cyclone pool body 1 are typically constructed of reinforced concrete. Both the central cyclone 2 and the cyclone pool body 1 are cylindrical, with a settling zone 101 located below the central cyclone 2 in the cyclone pool body 1. The central cyclone 2 is generally supported within the cyclone pool body 1 by support columns. During operation, turbid circulating water flows tangentially into the central cyclone 2 through the sheet metal channel 8, where solid-liquid separation is achieved through cyclone action. Solid slag accumulates in the settling zone 101 at the bottom of the cyclone pool body 1, while the clear water floats to the top. The pump unit 3 in the pump house 4 can pump the separated clear water for use in other areas of the steel plant where water is needed. Once a certain amount of slag has accumulated in the settling zone 101, it can be removed from the central cyclone 2 using a grab bucket device via a crane 7 and transferred to the slag storage tank 5. The working process of the central vortex cylinder 2 and the vortex pool body 1 is the same as that of existing vortex pool systems and is therefore not described in detail here. Furthermore, arranging the pump house 4 between the walls of the vortex pool body 1 and the central vortex cylinder 2 is also a conventional design for existing vortex pool systems. The top of the pump house 4 can be either enclosed or open, etc., which will not be elaborated upon here. The passageway here can be a pipe or a duct, etc.

[0025] This technical solution achieves a compact system layout by placing the pump house 4 between the walls of the cyclone pool body 1 and the central cyclone cylinder 2, and placing the slag storage tank 5 on top of the pump house 4, eliminating the need for additional space outside the cyclone pool to house the slag storage tank 5. Furthermore, since the slag storage tank 5 flows directly into the central cyclone cylinder 2, the filtered water in the slag storage tank 5 can directly enter the central cyclone cylinder 2, eliminating the need for an additional collection tank to collect the filtered water from the slag storage tank 5, thus effectively reducing the system's footprint requirements. Simultaneously, the slag storage tank 5's location on top of the pump house 4, i.e., its proximity to the central cyclone cylinder 5, effectively avoids the need for long-distance drainage pipes, thereby reducing the risk of pipe blockage and subsequent pipeline maintenance costs. Overall, this reduces the construction investment and operating costs of the cyclone pool. Additionally, the proximity of the slag storage tank 5 to the central cyclone cylinder 5 improves slag-grabbing efficiency. In addition, integrating the slag storage tank 5 onto the top of the vortex tank 1 increases the overall weight and also has the advantage of increasing the overall anti-buoyancy of the vortex tank in areas with high groundwater levels.

[0026] In this embodiment, the wall of the slag storage tank 5, located radially upwards from the central vortex cylinder 2, is shared with the central vortex cylinder 2. Specifically, the slag storage tank 5 and the central vortex cylinder 2 adopt a shared-wall structure design, meaning that the wall of the slag storage tank 5 on the side closest to the central vortex cylinder 2 directly utilizes the cylinder wall of the central vortex cylinder 2 as its wall. The thickness of the shared-wall structure can be adjusted according to the pressure-bearing requirements of the slag storage tank 5. Therefore, this technical solution, by designing the slag storage tank 5 and the central vortex cylinder 2 as a shared-wall structure, improves space utilization efficiency, reduces concrete usage, and further saves construction costs. Because the shared-wall structure makes the slag storage tank 5 and the central vortex cylinder 2 form a whole, it enhances the stability of the overall structure and is beneficial for withstanding water pressure and slag pressure. Furthermore, after being lifted from the slag area 501, the grab bucket only needs to move a very small distance to directly unload slag into the slag storage tank 5, shortening the operation cycle of the grab bucket crane 7. For the cyclone pool located within the continuous casting plant, when sharing a crane with the workshop production, it reduces the operational scheduling pressure on the crane 7 within the continuous casting workshop, avoids pollution of the ground environment caused by slag grabbing operations, and improves space utilization. This solution simplifies the structural layout, improves space utilization, and reduces construction and maintenance costs while ensuring functional implementation.

[0027] In this embodiment, the channel includes a connecting hole 201 disposed on the wall of the central cyclone cylinder 2, and a filter structure is provided in the connecting hole 201. Specifically, the connecting hole 201 can adopt a circular, square, or other regular shaped channel structure. The filter structure can be a stainless steel filter screen or a sintered metal filter element, etc. As a preferred embodiment, the filter structure is detachably installed, for example, fixed to the inner wall of the connecting hole 201 by flange connection or threaded connection, thereby facilitating later maintenance. In this way, the technical solution forms a controllable fluid channel between the slag storage tank 5 and the central cyclone cylinder 2 by setting a connecting hole 201 with a filtering function. During operation, large particles of sludge in the slag storage tank 5 are blocked on the slag storage tank side, and the filtered water can flow back to the cyclone tank through the connecting hole 201. This structure achieves communication between the slag storage tank 5 and the central cyclone cylinder 2 by directly opening a hole in the wall of the central cyclone cylinder 2, and the structure is simple. The connecting hole 201 has a low risk of clogging, which helps to reduce later maintenance costs.

[0028] In this embodiment, multiple connecting holes 201 are arranged circumferentially along the central cyclone tube 2. Specifically, the number of connecting holes 201 can be set to 4-12 depending on the actual processing requirements. As a preferred embodiment, the spacing between adjacent connecting holes 201 remains consistent. Thus, the multi-hole distribution design can significantly improve the slag-water separation efficiency and avoid system failure caused by blockage of a single connecting hole 201. The circumferential multi-hole arrangement also makes the slag-water separation process more stable, which helps to reduce disturbance to the clear water layer during system operation.

[0029] In this embodiment, the connecting hole 201 is located at the intersection of the wall of the central vortex cylinder 2 and the bottom of the slag storage tank 5, and extends obliquely downward from the intersection to the inner surface of the wall of the central vortex cylinder 2. Specifically, the connecting hole 201 is arranged at an angle, with its inlet end located at the intersection of the bottom of the slag storage tank 5 and the wall of the central vortex cylinder 2, and its outlet end extending to the inner wall surface of the central vortex cylinder 2. As a preferred embodiment, the angle between the axis of the connecting hole 201 and the horizontal plane is in the range of 30°-60°. Thus, this technical solution optimizes the spatial position and orientation of the connecting hole, allowing water in the slag storage tank 5 to flow naturally into the central vortex cylinder 2 by gravity, without the need for additional power supply. The obliquely arranged connecting hole 201 also helps to better avoid the problem of easy accumulation and blockage in the pipe.

[0030] In this embodiment, the bottom of the slag storage tank 5 is a slope 501, which is inclined towards the connecting hole 201. Specifically, the slope 501 of the tank bottom can adopt an inclination angle of 15-30 degrees, and can be achieved by concrete casting or steel plate welding. Thus, this technical solution, through the design of the inclined tank bottom, allows the water in the slag storage tank 5 to flow back into the vortex tank.

[0031] In this embodiment, the wall of the slag storage tank 5, located radially upwards along the central vortex cylinder 2 and close to the vortex tank body 1, shares a wall with the vortex tank body 1. Specifically, this shared-wall structure of the slag storage tank 5 and the vortex tank body 1 can be achieved by directly incorporating the side wall of the slag storage tank 5 as part of the vortex tank body 1 using an integral casting process. This integral casting ensures structural strength. Therefore, this technical solution, by designing one side wall of the slag storage tank 5 and the vortex tank body 1 as a shared-wall structure, effectively reduces the space occupied by independent walls, improves the space utilization rate of the vortex tank system, and also reduces concrete usage, thereby further reducing construction investment.

[0032] In this embodiment, the wall of the slag storage tank 5 is higher than the ground surface 6 by a set distance, the set distance ranging from 0.8 to 1.5 meters. Specifically, this set distance is the vertical distance between the top of the tank wall and the ground surface. The value of this set distance needs to take into account both slag and water splash protection and operational convenience. Therefore, this technical solution, by designing the wall of the slag storage tank 5 to be higher than the ground surface, can improve operational safety. The set distance range of 0.8 to 1.5 meters provides good protection and does not affect the slag removal operation of the grab bucket.

[0033] In this embodiment, the pump house 4 includes an annular support plate 401 disposed between the central vortex cylinder 2 and the vortex pool body 1, and the pump set 3 is installed on the annular support plate 401. Specifically, the annular support plate is made of concrete slab and is cast together with the central vortex cylinder 2 and the vortex pool body 1. The thickness of the annular support plate 401 can be calculated and determined according to the weight of the pump set, etc. The pump set 3 typically includes a water pump and a slag flushing pump, etc. The water pump is used to draw clean water from the vortex pool, and the slag flushing pump is used to flush the residue in the iron sheet trench 8. Here, the composition structure of the pump set 3 is existing technology and will not be described in detail. The pump set 3 is arranged as far away from the slag storage tank 5 as possible to facilitate the hoisting and installation of the pump set 3. This technical solution achieves integrated installation of the pump set through the annular support plate 501. The annular support plate simultaneously undertakes the dual functions of structural reinforcement and equipment installation, and the overall structure has good stability. In some embodiments, the top of the pump house 4 can adopt a closed structure, and the pump set 3 can be hoisted and installed by setting a hoisting hole 9 on the cover. In some other embodiments, the top of the pump house 4 may be an open structure. For open structures, the top of the vortex pool 1 is generally a certain distance above the ground to ensure the safety of on-site operations.

[0034] In this embodiment, the bottom of the cyclone pool 1 is provided with an inverted frustum-shaped slag area 101, which is located directly below the central cyclone cylinder. The inverted frustum-shaped structure of the slag collection area 501 means that its cross-section gradually decreases from top to bottom, forming a cone-shaped funnel. In specific implementation, the inclination angle of the cone surface can be selected within the range of 45-60 degrees to facilitate the slag material to slide down the inclined surface. The slag collection area 501 is formed by concrete casting. This technical solution, by setting the inverted frustum-shaped slag collection area 501, allows the slag material after cyclone separation to collect along the cone surface under the action of gravity, effectively solving the problem of slag material accumulation and dispersion in traditional flat-bottomed pools. Specifically, the cone-shaped structure increases the slag material accumulation density and reduces the required grab bucket operating area.

[0035] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A hydrocyclone system for treating turbid water at a steel plant, characterized by: The device includes a cyclone pool body and a central cyclone cylinder concentrically arranged in the cyclone pool body. A pump house for installing a pump unit is provided between the walls of the cyclone pool body and the central cyclone cylinder. A slag storage tank is provided on the top of the cyclone pool body at the pump house. The slag storage tank is connected to the central cyclone cylinder through a channel for allowing filtered water in the slag storage tank to flow into the central cyclone cylinder.

2. The cyclone pool system for treating turbid circulating water in steel plants according to claim 1, characterized in that: The wall of the slag storage tank along the radial direction of the central vortex cylinder, close to the central vortex cylinder, shares the same wall with the central vortex cylinder.

3. The rotating cyclone system for treatment of turbid water in a steel plant according to claim 2, characterized in that: The channel includes a connecting hole on the wall of the central vortex tube, and a filter structure is provided in the connecting hole.

4. The rotating cyclone system for treatment of turbid water in a steel plant according to claim 3, characterized in that: The connecting holes are arranged in multiple directions along the circumference of the central vortex tube.

5. The rotating cyclone system for treatment of turbid water in a steel plant as claimed in claim 3 wherein: The connecting hole is located at the junction of the wall of the central cyclone cylinder and the bottom of the slag storage tank, and extends obliquely downward from the junction to the inner surface of the wall of the central cyclone cylinder.

6. The rotating cyclone system for treatment of turbid water in a steel plant according to claim 5, characterized in that: The bottom of the slag storage tank is a slope, which is inclined towards the connecting hole.

7. The rotating cyclone cell system for treatment of turbid water in a steel plant according to claim 1, characterized in that: The wall of the slag storage tank, located radially upwards along the central vortex cylinder and close to the vortex tank body, shares the same wall with the vortex tank body.

8. The rotating cyclone cell system for treatment of turbid water in a steel plant according to claim 1, characterized in that: The wall of the slag storage tank is higher than the ground level at a set distance, and the set distance ranges from 0.8 to 1.5 meters.

9. The rotating cyclone system for treatment of turbid water in a steel plant as claimed in claim 1 wherein: The pump house includes an annular support plate disposed between the central vortex cylinder and the vortex pool body, and the pump set is installed on the annular support plate.

10. The rotating cyclone system for treatment of turbid water in a steel plant according to claim 1, characterized in that: The bottom of the cyclone pool is provided with a truncated cone-shaped sedimentation zone, which is located directly below the central cyclone cylinder.

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