A turbid circulating water impurity control system for preventing clogging of a rolling mill roll nozzle

Abstract

The application discloses a turbid circulating water impurity control system for preventing rolling mill roller nozzle blockage, which is applied to a horizontal flow sedimentation tank, a filter, a cooling tower and a rolling mill turbid ring water supply pool connected in sequence, the filter is further connected with a bypass pipeline through a turbid ring upper tower dry pipe to guide water to the rolling mill turbid ring water supply pool, the cooling tower is connected with the rolling mill turbid ring water supply pool through a lower tower pipe at a water collecting opening, and the turbid circulating water impurity control system comprises a perforated plate, a filter cartridge, a filtered water tank and a P-type filter, the perforated plate is installed at the water collecting opening of the cooling tower, the filter cartridge is installed in an opening of the perforated plate, the filter cartridge is installed in a vertical direction, the filter aperture of the filter cartridge is smaller than the diameter of the rolling mill nozzle, the filtered water tank is installed at the lower end of the lower tower pipe, a grate is arranged at the bottom of the filtered water tank, and the P-type filter is installed in the bypass pipeline.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of water supply and drainage technology, and in particular to a turbid circulating water impurity control system for preventing nozzle blockage of a rolling mill roll. BACKGROUND

[0002] The turbid circulating water of the rolling mill provides direct cooling water for the roll and the rack through the spray nozzle. The process flow of the turbid circulating water system of the rolling mill is shown in FIG. 1. Figure 1 As shown in FIG. 1, the water in the turbid circulating water supply pool of the rolling mill is pressurized by a water supply pump and delivered to the rolling mill through a pipeline, and the roll and the rack are cooled through the spray nozzle. The turbid circulating water after spraying enters the spiral flow sedimentation tank through the iron sheet ditch to remove the large particles of iron oxide scale. The turbid circulating water is lifted by a water pump to the horizontal flow sedimentation tank for further sedimentation and oil removal. Then the turbid circulating water is pressurized by a water pump to remove the suspended solids in the water through a high-speed filter. The filtered water is cooled in the cooling tower using the excess pressure. The cooled water enters the turbid circulating water supply pool of the rolling mill, and a system cycle is completed.

[0003] In actual operation, the cooling tower filler material is PVC corrugated type. According to the actual use of the system, the service life of the filler is about 5 years. With the aging of the filler, fragments enter the water system, causing nozzle blockage. In order to prevent the filler fragments from entering the system, a grate is added at the water collection port of the cooling tower. The grate is composed of a steel frame and a stainless steel filter screen. After long-term operation of the grate, there are defects such as corrosion of the steel frame, loosening of the bolts, deformation of the stainless steel screen, and poor fit of the grate with the edge of the water tank, which can easily lead to inadequate protection and cause impurities to enter the system.

[0004] The filter material in the filter is anthracite, gravel and quartz sand, and the stone diameter is small. Once the filter cap at the bottom of the filter is damaged, the filter material will directly enter the turbid circulating water supply pool of the rolling mill through the bypass pipeline.

[0005] The above reasons can cause nozzle blockage, which can affect the quality of rolled steel, and can even cause rolling equipment failure and accidents. SUMMARY

[0006] The turbid circulating water impurity control system for preventing nozzle blockage of the rolling mill roll provided by the present application solves the technical problem of nozzle blockage of the rolling mill roll in the prior art.

[0007] The application provides a turbid circulating water impurity control system for preventing rolling mill roller nozzle blockage, which is applied to a horizontal flow sedimentation tank, a filter, a cooling tower and a rolling mill turbid ring water supply pool connected in sequence. The filter is also connected to the rolling mill turbid ring water supply pool through a turbid ring upper tower dry pipe bypass pipeline. The cooling tower is connected to the rolling mill turbid ring water supply pool through a lower tower pipe at a water collecting port. The turbid circulating water impurity control system comprises a perforated plate, a filter cartridge, a filtered water tank and a P-type filter. The perforated plate is installed at the water collecting port of the cooling tower. The filter cartridge is installed in the opening of the perforated plate and is installed vertically. The filter aperture of the filter cartridge is smaller than the diameter of the rolling mill nozzle. The filtered water tank is installed at the lower end of the lower tower pipe. The bottom of the filtered water tank is provided with a grate. The P-type filter is installed in the bypass pipeline.

[0008] In some embodiments, the perforated plate is a steel plate with holes. The filter cartridge is made of a stainless steel punched plate. The perforated plate is installed horizontally in the cooling tower.

[0009] In some embodiments, the joint between the perforated plate and the water tank in the cooling tower is fully sealed. The edge of the filter cartridge is lower than the plane of the perforated plate after installation.

[0010] In some embodiments, a layer of prismatic grate is additionally arranged around the water collecting port. The filter aperture of the prismatic grate is larger than the filter aperture of the filter cartridge.

[0011] In some embodiments, two layers of grates are arranged in the filtered water tank. The grates comprise a profile steel, a grid plate and a stainless steel mesh. The stainless steel mesh is installed on the grid plate. The grid plate is installed on the wall of the filtered water tank through the profile steel.

[0012] In some embodiments, a blind plate is obliquely sealed at the open end of the lower tower pipe. The blind plate is provided with an opening at a vertical side of the lower tower pipe. The filtered water tank is installed at the opening.

[0013] In some embodiments, the filtered water tank is additionally provided with a cover plate.

[0014] In some embodiments, an alarm float is arranged in the filtered water tank. When the water level in the filtered water tank rises to a preset height, an alarm signal is triggered.

[0015] In some embodiments, the rolling mill turbid ring water supply pool is provided with a cover plate. The cover plate is locked and managed.

[0016] In some embodiments, all the wall-penetrating pipe gaps entering the rolling mill turbid ring water supply pool are sealed, and only the exhaust holes are reserved.

[0017] The beneficial effects of this application are as follows: It provides a turbid circulating water impurity control system to prevent clogging of rolling mill roll nozzles. The original grate at the water inlet is removed, and a perforated plate is laid at the water inlet of the cooling tower. Filter cartridges are inserted into the openings of the perforated plate, with the edge of the filter cartridge lower than the plane of the perforated plate. The filter aperture of the filter cartridge is smaller than the diameter of the rolling mill nozzles. Packing debris or other impurities fall directly into the filter cartridge with the water flow, achieving a maximum interception effect and making it the most important interception facility at the cooling tower water tank. A filter water tank is added before the cooling tower pipe enters the rolling mill turbid circulating water supply pool. The impurities in the filter water tank... The grate serves as a backup interception facility for the cooling tower; a P-type filter is installed in the bypass between the filter and the upper tower pipe to prevent the filter media of the high-speed filter from entering the turbid water supply pool of the rolling mill; above, this system changes the original grate filtration method and adopts a new filter cartridge design, which makes water filtration faster and cleaning easier. It uses technical means to directly prevent debris from entering the water supply pool and also prevents filter media from entering the turbid water system. It has the characteristics of simple control and significant effect. Through the change from human prevention to technical prevention, the number of times the rolling mill roll nozzles are blocked is effectively reduced, ensuring the safe and reliable operation of the equipment and guaranteeing the normal production of steel rolling. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention.

[0019] Figure 1 This is a schematic diagram of the process flow of the rolling mill's turbid circulating water system;

[0020] Figure 2 A cross-sectional view of a cooling tower in a turbid circulating water impurity control system for preventing clogging of rolling mill roll nozzles provided in this application;

[0021] Figure 3 A top view of the cooling tower water collection tray in the system provided in this application;

[0022] Figure 4 A schematic diagram of the filter cartridge design principle in the system provided in this application.

[0023] Figure 5 for Figure 4 Cross-sectional view at point AA;

[0024] Figure 6 A schematic diagram of adding a filter water tank to the lower tower pipe of the system;

[0025] Figure 7 A schematic diagram showing the addition of a P-type filter to the bypass pipe in the system provided in this application.

[0026] Attached diagram labels: 10-Cooling tower, 11-Water inlet, 12-Water collection tank, 13-Lower tower pipe, 14-Upper tower pipe, 20-Rolling mill turbid ring water supply pool, 21-Turbid ring upper tower main pipe, 30-Bypass pipe, 100-Orifice plate, 110-Filter cartridge positioning ring, 200-Filter cartridge, 300-Filter water tank, 400-P-type filter, 500-Frustum-shaped grate. Detailed Implementation

[0027] This embodiment provides a turbid circulating water impurity control system to prevent clogging of rolling mill roll nozzles, which is applied to... Figure 1 The process flow diagram of the rolling mill turbidity circulating water system is shown. The horizontal flow sedimentation tank, filter, cooling tower, and rolling mill turbidity circulating water supply tank are connected sequentially.

[0028] Please refer to Figure 1 The cooling tower 10 is equipped with an upper tower pipe 14 and a lower tower pipe 13. The upper tower pipe 14 is equipped with a bypass pipe 30. Both the upper tower pipe 14 and the bypass pipe 30 are connected to one end of the turbid ring upper tower main pipe 21. The other end of the turbid ring upper tower main pipe 21 is connected to a filter. The end of the bypass pipe 30 that is away from the turbid ring upper tower main pipe 21 is connected to the rolling mill turbid ring water supply pool 20.

[0029] Please refer to the reference. Figures 2 to 7 This embodiment discloses a turbid circulating water impurity control system for preventing clogging of rolling mill roll nozzles, comprising an orifice plate 100, a filter cartridge 200, a filter water tank 300, and a P-type filter 400. The orifice plate 100 is installed at the water inlet 11 of the cooling tower 10. The filter cartridge 200 is installed in the openings of the orifice plate 100, and is installed vertically. The filter aperture of the filter cartridge 200 is smaller than the diameter of the rolling mill nozzle. The filter water tank 300 is installed at the lower end of the lower tower pipe 13, and a grate is provided at the bottom of the filter water tank 300. The P-type filter 400 is installed in the bypass pipe 30.

[0030] Figure 2 The system displays the water inlet 11 of the cooling tower 10 and the water collection tank 12 below it. The original grate at the water inlet 11 is removed, and an orifice plate 100 is installed at the water inlet 11. The openings of the orifice plate 100 match those of the filter cartridge 200. The overlap between the orifice plate 100 and the water tank inside the cooling tower 10 can be fully sealed. The filter cartridge 200 is inserted into the openings of the orifice plate 100, and after installation, the edge of the filter cartridge 200 is lower than the plane of the orifice plate 100. The filter aperture of the filter cartridge 200 is limited to being smaller than the diameter of the rolling mill nozzle, while the filtration accuracy of the filter cartridge 200 is higher than that of the rolling mill nozzle. Packing debris or other impurities fall directly into the filter cartridge 200 with the water flow, maximizing the interception effect and making it the primary interception facility at the water tank of the cooling tower 10.

[0031] After the filter cartridge 200 is installed, as follows Figure 3As shown, a layer of prism grate 500 can be added around the water collecting port 11, the grate filter screen uses a coarse filter screen, the filtering aperture of the prism grate 500 is larger than the filtering aperture of the filter cartridge 200, and the prism grate 500 performs a first interception, facilitating the cleaning of larger filler fragments or sundries.

[0032] Please refer to Figure 6 , the system adds a filter water tank 300 before the rolling mill turbid ring water supply pool 20 at the lower tower pipe 13 of the cooling tower 10, a filter water tank 300 is made of thick steel plates at the position where the lower tower pipe 13 of the cooling tower 10 enters the rolling mill turbid ring water supply pool 20, the lower half of the lower tower pipe 13 is welded with the water tank, a blind plate is obliquely sealed at the open upper half, a hole is opened from the side, and the water in the lower tower flows out through the hole. In some embodiments, the filter water tank 300 is placed with two layers of grates made of section steel, grid plates, and stainless steel meshes respectively at the bottom of the filter water tank 300, and the relevant connection relationship is that the stainless steel meshes are installed on the grid plates, the grid plates are installed on the tank wall of the filter water tank 300 through the section steel, the lower grate is permanently fixed, and the upper filtering aperture plate 100 is detachable for convenient maintenance and cleaning. A cover plate is installed on the top of the filter water tank 300 to prevent water from splashing out. The two layers of grates serve as backup interception facilities of the cooling tower 10.

[0033] Please refer to Figure 1 and Figure 7 , a P-type filter 400 is installed beside the filter to the upper tower pipe 14. In order to avoid the turbid ring upper tower main pipe 21 bypass valve from being closed tightly due to the running filler such as pebbles, quartz sand, and anthracite in the filter, causing the filler to directly enter the turbid ring water supply pool through the bypass pipeline 30, a P-type filter 400 with a filtering precision of 30 microns is installed in the bypass pipeline 30, and when the cooling tower 10 is maintained, the turbid ring upper tower main pipe 21 enters the turbid ring water supply pool through the bypass pipeline 30 under the action of the P-type filter 400.

[0034] In summary, the system changes the original grate filtering mode, adopts a new type of filter cartridge 200 design, filters water more quickly, and cleans more conveniently, uses technical means to directly avoid sundries from entering the water supply pool, and avoids filler from entering the turbid ring water system, has the characteristics of simple control and remarkable effect, and through the change from civil defense to technical defense, the number of rolling mill roll nozzle blockages is effectively reduced, the safe and reliable operation of the equipment is ensured, and the normal production of steel rolling is guaranteed.

[0035] Regarding the aperture plate 100, it can be a steel plate with holes, and the aperture plate 100 is installed horizontally in the cooling tower 10. The filter cartridge 200 is processed from a stainless steel punched plate 100, please refer to Figure 2 , Figure 4 and Figure 5 , the filter cartridge positioning ring 110 is installed on the aperture plate 100, the filter cartridge positioning ring 110 is located outside the aperture of the aperture plate 100, and the filter cartridge 200 is installed at the filter cartridge positioning ring 110. For example Figure 5As shown, a combination of long filter cartridge 200 and short filter cartridge 200 is shown.

[0036] In some embodiments, an alarm float is provided in the filter water tank 300. When the filter water tank 300 is normally filtering, the water level in the tank is normal. Once the impurities are too much, the water level rises, the float triggers an alarm signal, reminding the cleaning of the water tank.

[0037] At present, the turbid ring rolling mill water supply pool is open. In daily operation, sundries such as welding slag, leaves and the like are easy to enter the turbid ring rolling mill water supply pool.

[0038] In the present system, all the wall pipe gaps entering the turbid ring rolling mill water supply pool 20 are plugged, and only the exhaust hole is reserved. The turbid ring rolling mill water supply pool 20 is provided with a cover plate. In order to prevent the cover plate of the turbid ring rolling mill water supply pool from being displaced, the cover plate is locked and managed, preventing sundries around the water suction well from entering the system.

[0039] Although the preferred embodiments of the present application have been described, those skilled in the art can make further changes and modifications to these embodiments once they know the basic inventive concept. Therefore, the appended claims are intended to be interpreted as including all the preferred embodiments and all the changes and modifications falling within the scope of the present application.

[0040] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these modifications and variations.

Claims

1. A turbid circulating water impurity control system for preventing clogging of a rolling mill roll nozzle, characterized by, The turbid circulating water impurity control system is applied to the sequentially connected horizontal flow sedimentation tank, filter, cooling tower and rolling mill turbid circulating water supply tank, the filter is also connected to the rolling mill turbid circulating water supply tank through the bypass pipeline of the turbid circulating water upper tower dry pipe, the cooling tower is connected to the rolling mill turbid circulating water supply tank through the lower tower pipe at the water collecting port, and the turbid circulating water impurity control system comprises: A hole plate and a filter cartridge, the hole plate is installed at the water collecting port of the cooling tower, the filter cartridge is installed in the opening of the hole plate, the filter cartridge is installed vertically, and the filter aperture of the filter cartridge is smaller than the diameter of the rolling mill nozzle; A filter water tank is installed at the lower end of the lower tower pipe, and a grate is arranged at the bottom of the filter water tank; A P-type filter is installed in the bypass pipeline.

2. The once-through water system for controlling impurities according to claim 1, wherein The hole plate is a steel plate with holes, the filter cartridge is processed from a stainless steel punched plate, and the hole plate is transversely installed in the cooling tower.

3. The once-through water system of claim 1 wherein, The hole plate and the water tank in the cooling tower are fully closed at the overlapping position, and the edge of the filter cartridge is lower than the plane of the hole plate after installation.

4. The once-through water system of any one of claims 1-3, wherein, A layer of prismatic grate is additionally arranged around the water collecting port, and the filter aperture of the prismatic grate is larger than the filter aperture of the filter cartridge.

5. The once-through water system of claim 1 wherein, The filter water tank is provided with two layers of grates, the grates comprise profile steel, grid plates and stainless steel meshes, the stainless steel meshes are installed on the grid plates, and the grid plates are installed on the tank wall of the filter water tank through the profile steel.

6. The once-through water system of claim 1 wherein, A blind plate is obliquely sealed at the lower end of the lower tower pipe, the blind plate is provided with an opening at a vertical side of the lower tower pipe, and the filter water tank is installed at the opening.

7. The once-through water system of claim 1 wherein, The filter water tank is additionally provided with a cover plate.

8. The once-through water system of claim 1 wherein, An alarm float is arranged in the filter water tank, and an alarm signal is triggered when the water level in the filter water tank rises to a preset height.

9. The once-through water system of claim 1 wherein, The rolling mill turbid circulating water supply tank is provided with a cover plate, and the cover plate is locked and managed.

10. The once-through water system of claim 1 wherein, All wall penetrating pipe gaps entering the rolling mill turbid circulating water supply tank are sealed, and only exhaust holes are reserved.

Images