Steel cold rolling wastewater reverse osmosis concentrated water pretreatment device

Abstract

The utility model discloses a steel cold rolling wastewater reverse osmosis concentrated water pretreatment device which comprises a box body, the top end of the box body is vertically and rotatably connected with a screw rod, the screw rod penetrates through the inner wall of the top end of the box body, the box body is internally provided with a rotary flushing mechanism for driving the screw rod to rotate, and the interior of the box body is slidably connected with a scraping plate. The scraping plate is matched with the box body, a sliding mechanism for driving the scraping plate to move up and down is arranged in the box body, and a stirring mechanism for mixing and stirring chemicals and sewage is arranged in the box body. According to the device, chemical agents and waste water are mixed and stirred, so that the chemical agents and the waste water can be in full contact for reaction, and the fluorine ion removal efficiency is improved, so that the pretreatment efficiency of reverse osmosis concentrated water of steel cold rolling waste water is improved, sediments on the four walls in the device are scraped and washed, and the service life of the device is prolonged. The pretreatment efficiency of the reverse osmosis concentrated water of the steel cold rolling wastewater is further improved.

Description

Technical Field

[0001] The utility model relates to the technical field of reverse osmosis concentrated water pretreatment of steel cold rolling wastewater, in particular to a reverse osmosis concentrated water pretreatment device for steel cold rolling wastewater. Background Art

[0002] Cold rolling wastewater is one of the most difficult wastewaters to treat in the metallurgical industry. The cold rolling process is complicated, including acid rolling, degreasing, hot-dip galvanizing, electrotinning, color coating, leveling, etc. Different types of wastewater from each process are aggregated into cold rolling wastewater. Cold rolling wastewater has a large amount of water, high organic content and complex composition. After the steel cold rolling wastewater is reused by the first-level reverse osmosis and recovered by the second-level reverse osmosis, the concentrated water contains a small amount of fluoride ions. If the fluoride ions are not removed, it will damage the inside of the machine device, thereby ensuring its subsequent evaporation recovery process.

[0003] Existing fluoride removal methods usually use chemical precipitation methods, usually adding chemical reagents to react with sewage to form precipitates. If the chemicals and sewage are not stirred and mixed, the efficiency of fluoride removal will be reduced, thereby reducing the pretreatment efficiency of steel cold rolling wastewater. After the existing device removes fluoride ions, a large amount of precipitates will be generated inside the device. If they are not removed in time, the capacity of the device will be reduced, thereby reducing the pretreatment efficiency of steel cold rolling wastewater. Therefore, this patent proposes a reverse osmosis concentrated water pretreatment device for steel cold rolling wastewater to solve such problems. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes a reverse osmosis concentrated water pretreatment device for steel cold rolling wastewater.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A reverse osmosis concentrated water pretreatment device for steel cold rolling wastewater comprises a box body, the top of the box body is vertically rotatably connected to a screw rod, the screw rod passes through the inner wall of the top of the box body, a rotating flushing mechanism for driving the screw rod to rotate is arranged inside the box body, a scraper is slidably connected inside the box body, the scraper is adapted to the box body, a sliding mechanism for driving the scraper to move up and down is arranged inside the box body, and a stirring mechanism for mixing and stirring chemicals and sewage is arranged inside the box body.

[0007] Preferably, the rotary flushing mechanism includes a water tank, a bottom end of which is fixedly connected to a horizontal plate, the horizontal plate is horizontally fixedly connected to one side of the tank body, two water pumps are fixedly connected to the inner wall of one side of the bottom of the water tank, one end of the drain outlet of one of the water pumps is fixedly connected to a water outlet pipe, the other end of the water outlet pipe is rotatably connected to the bottom end of a screw rod, the screw rod is hollow inside, and the water outlet pipe is communicated with the screw rod.

[0008] Preferably, a plurality of water outlet holes are opened on the screw rod, and the plurality of water outlet holes are equidistantly distributed around the circumference. One end of the water inlet of the other water pump is fixedly connected to a water inlet pipe, one end of the water inlet pipe passes through an inner wall of one side of the box body, the water inlet pipe is connected to the box body, and a filter is installed on the water inlet pipe.

[0009] Preferably, the sliding mechanism includes connecting rods, there are four connecting rods, one end of the four connecting rods is respectively fixedly connected to one side of the scraper, the screw rod is threadedly connected with a threaded sleeve, and the other ends of the four connecting rods are respectively fixedly connected to the threaded sleeve.

[0010] Preferably, the top end of the screw rod is fixedly connected to a rotating shaft, the top end of the rotating shaft is fixedly connected to a second belt pulley, the top end of the box body is fixedly connected to a rectangular box, the rectangular box is open at the bottom, the top end of the rectangular box is fixedly connected to a motor, and the output end of the motor is coaxially fixedly connected to the top end of the second belt pulley.

[0011] Preferably, the stirring mechanism includes four round rods, the four round rods are all rotatably connected to the top of the box body, the four round rods all pass through the inner wall of the top of the box body, the four round rods are distributed in a rectangular shape, a plurality of stirring rods are fixedly connected to the four round rods, the plurality of stirring rods are equidistantly distributed in a circle, a first belt pulley is fixedly connected to the top of the four stirring rods, the same first belt is wound around the four first belt pulleys, another second belt pulley is fixedly connected to the top of one of the first belt pulleys, and the same second belt is wound around the two second belt pulleys.

[0012] Preferably, four legs are fixedly connected to the bottom of the box body, and the four legs are distributed in a rectangular shape. A first water inlet is opened on one side of the box body, a second water inlet is opened on the top of the water tank, and a water outlet is opened on one side of the bottom of the water tank.

[0013] The beneficial effects of the utility model are:

[0014] 1. Through the provision of round rods and stirring rods, the mixing and stirring of chemical reagents and wastewater is achieved, so that they can fully contact and react, thereby improving the efficiency of removing fluoride ions, thereby improving the pretreatment efficiency of reverse osmosis concentrated water of steel cold rolling wastewater.

[0015] 2. The scrapers and screws are used to scrape off the sediment on the four walls of the device, avoiding the reduction of the internal capacity of the device due to long-term sedimentation operation, and improving the pretreatment efficiency of reverse osmosis concentrated water of steel cold rolling wastewater.

[0016] 3. Through the water pump and water tank, the sediment on the four walls of the device can be flushed to avoid the situation where the sediment is too much and too tight to be difficult to clean, further improving the pretreatment efficiency of reverse osmosis concentrated water of steel cold rolling wastewater. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the overall structure of a reverse osmosis concentrated water pretreatment device for steel cold rolling wastewater proposed by the utility model;

[0018] Figure 2 This is a schematic diagram of the internal structure of a box of a reverse osmosis concentrated water pretreatment device for steel cold rolling wastewater proposed by the utility model;

[0019] Figure 3 This is a schematic diagram of the internal structure of a rectangular box of a steel cold rolling wastewater reverse osmosis concentrated water pretreatment device proposed by the utility model;

[0020] Figure 4 This is a schematic diagram of the internal structure of a water tank of a reverse osmosis concentrated water pretreatment device for steel cold rolling wastewater proposed by the utility model.

[0021] In the figure: 1. box body; 2. support legs; 3. first water inlet; 4. rectangular box; 5. motor; 6. horizontal plate; 7. water tank; 8. second water inlet; 9. water outlet; 10. water outlet pipe; 11. scraper; 12. connecting rod; 13. round rod; 14. stirring rod; 15. threaded sleeve; 16. first belt pulley; 17. first belt; 18. second belt pulley; 19. second belt; 20. screw; 21. water outlet hole; 22. water pump; 23. water inlet pipe. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0023] Reference Figure 1-4 A reverse osmosis concentrated water pretreatment device for steel cold rolling wastewater includes a box body 1, a screw rod 20 is vertically rotatably connected to the top of the box body 1, the screw rod 20 passes through the inner wall of the top of the box body 1, a rotating flushing mechanism for driving the screw rod 20 to rotate is provided inside the box body 1, a scraper 11 is slidably connected inside the box body 1, the scraper 11 is adapted to the box body 1, a sliding mechanism for driving the scraper 11 to move up and down is provided inside the box body 1, and a stirring mechanism for mixing and stirring chemicals and sewage is provided inside the box body 1.

[0024] Among them, a reverse osmosis concentrated water pretreatment device for steel cold rolling wastewater, the rotating flushing mechanism includes a water tank 7, the bottom end of the water tank 7 is fixedly connected to a horizontal plate 6, the horizontal plate 6 is horizontally fixedly connected to one side of the box body 1, and two water pumps 22 are fixedly connected to the inner wall of one side of the bottom of the water tank 7, one end of the drainage port of one water pump 22 is fixedly connected to a water outlet pipe 10, and the other end of the water outlet pipe 10 is rotatably connected to the bottom end of a screw rod 20, the screw rod 20 is hollow inside, and the water outlet pipe 10 is connected to the screw rod 20.

[0025] Among them, a reverse osmosis concentrated water pretreatment device for steel cold rolling wastewater is provided, a plurality of water outlet holes 21 are opened on the screw rod 20, and the plurality of water outlet holes 21 are evenly distributed in a circle. One end of the water inlet of another water pump 22 is fixedly connected to a water inlet pipe 23, one end of the water inlet pipe 23 passes through the inner wall of one side of the box body 1, the water inlet pipe 23 is connected to the box body 1, and a filter is installed on the water inlet pipe 23.

[0026] Among them, a reverse osmosis concentrated water pretreatment device for steel cold rolling wastewater, the sliding mechanism includes a connecting rod 12, there are four connecting rods 12, one end of the four connecting rods 12 is respectively fixedly connected to one side of the scraper 11, a threaded sleeve 15 is threadedly connected to the screw rod 20, and the other ends of the four connecting rods 12 are respectively fixedly connected to the threaded sleeve 15.

[0027] Among them, a reverse osmosis concentrated water pretreatment device for steel cold rolling wastewater, the top of the screw rod 20 is fixedly connected to a rotating shaft, the top of the rotating shaft is fixedly connected to a second belt pulley 18, the top of the box body 1 is fixedly connected to a rectangular box 4, the rectangular box 4 is open at the bottom, the top of the rectangular box 4 is fixedly connected to a motor 5, and the output end of the motor 5 is coaxially fixedly connected to the top of the second belt pulley 18.

[0028] Among them, a reverse osmosis concentrated water pretreatment device for steel cold rolling wastewater, the stirring mechanism includes round rods 13, there are four round rods 13, the four round rods 13 are rotatably connected to the top of the box body 1, the four round rods 13 pass through the inner wall of the top of the box body 1, the four round rods 13 are distributed in a rectangular shape, and a plurality of stirring rods 14 are fixedly connected to the four round rods 13, and the plurality of stirring rods 14 are equidistantly distributed in a circle. The tops of the four stirring rods 14 are fixedly connected to first belt pulleys 16, and the same first belt 17 is wound between the four first belt pulleys 16, and the top of one of the first belt pulleys 16 is fixedly connected to another second belt pulley 18, and the same second belt 19 is wound between the two second belt pulleys 18.

[0029] Among them, a reverse osmosis concentrated water pretreatment device for steel cold rolling wastewater is provided, and four legs 2 are fixedly connected to the bottom of the box body 1, and the four legs 2 are distributed in a rectangular shape. A first water inlet 3 is opened on one side of the box body 1, a second water inlet 8 is opened on the top of the water tank 7, and a water outlet 9 is opened on one side of the bottom of the water tank 7.

[0030] Working principle: First, sewage is introduced into the box body 1 through the first water inlet 3, and then the chemical agent is introduced into the box body 1 through the first water inlet 3, and then the motor 5 is turned on. As the motor 5 is turned on, the second belt pulley 18 is driven to rotate, and then the screw rod 20 is driven to rotate. Under the action of the second belt 19 and the first belt 17, the four first belt pulleys 16 are driven to rotate, and then the four round rods 13 are driven to rotate, thereby driving the multiple stirring rods 14 to rotate. The rotation of the screw rod 20 drives the threaded sleeve 15 to rise from the bottom of the screw rod 20 to the top of the screw rod 20. When it rises to the top, the motor 5 is reversed to drive the screw rod 20 to rotate in the opposite direction, and then the scraper 11 moves downward. At this time, the two water pumps 22 are turned on to pump the water in the box body 1 into the water tank, and then introduced into the screw rod 20, and sprayed through the opened water outlet 21 to flush the inner wall of the box body 1, and finally the solenoid valve at the bottom of the box body 1 is opened to clean out the sediment.

[0031] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A reverse osmosis concentrated water pretreatment device for steel cold rolling wastewater, comprising a housing (1), characterized in that: The top of the box (1) is vertically rotatably connected to a screw rod (20), the screw rod (20) passes through the inner wall of the top of the box (1), the box (1) is provided with a rotating flushing mechanism for driving the screw rod (20) to rotate, the box (1) is slidably connected to a scraper (11) inside, the scraper (11) is adapted to the box (1), the box (1) is provided with a sliding mechanism for driving the scraper (11) to move up and down, and the box (1) is provided with a stirring mechanism for mixing and stirring the medicine and sewage; the rotating flushing mechanism is provided with a screw rod (20) inside, the screw rod (20) passes through the inner wall of the top of the box (1), the box (1) is provided with a rotating flushing mechanism for driving the screw rod (20) to rotate, the box (1) is provided with a scraper (11) inside, the scraper (11) is adapted to the box (1), the box (1) is provided with a sliding mechanism for driving the scraper (11) to move up and down, and the box (1) is provided with a stirring mechanism for mixing and stirring the medicine and sewage; The washing mechanism comprises a water tank (7), the bottom end of the water tank (7) is fixedly connected to a transverse plate (6), the transverse plate (6) is horizontally fixedly connected to one side of the box body (1), and two water pumps (22) are fixedly connected to the inner wall of one side of the bottom of the water tank (7), one end of the drainage port of one of the water pumps (22) is fixedly connected to a water outlet pipe (10), the other end of the water outlet pipe (10) is rotatably connected to the bottom end of a screw rod (20), the screw rod (20) is hollow inside, and the water outlet pipe (10) is connected to the screw rod (20).

2. A reverse osmosis concentrated water pretreatment device for steel cold rolling wastewater according to claim 1, characterized in that: The screw rod (20) is provided with a plurality of water outlet holes (21), which are equidistantly distributed around the circumference; one end of the water inlet of the other water pump (22) is fixedly connected to a water inlet pipe (23); one end of the water inlet pipe (23) passes through an inner wall of one side of the box body (1); the water inlet pipe (23) is connected to the box body (1); and a filter screen is installed on the water inlet pipe (23).

3. A reverse osmosis concentrated water pretreatment device for steel cold rolling wastewater according to claim 1, characterized in that: The sliding mechanism comprises a connecting rod (12), wherein there are four connecting rods (12), one end of each of the four connecting rods (12) is fixedly connected to one side of the scraper (11), a threaded sleeve (15) is threadedly connected to the screw rod (20), and the other ends of the four connecting rods (12) are fixedly connected to the threaded sleeve (15).

4. A reverse osmosis concentrated water pretreatment device for steel cold rolling wastewater according to claim 1, characterized in that: The top end of the screw rod (20) is fixedly connected to a rotating shaft, the top end of the rotating shaft is fixedly connected to a second belt pulley (18), the top end of the box body (1) is fixedly connected to a rectangular box (4), the rectangular box (4) is open at the bottom, the top end of the rectangular box (4) is fixedly connected to a motor (5), and the output end of the motor (5) is coaxially fixedly connected to the top end of the second belt pulley (18).

5. The reverse osmosis concentrated water pretreatment device for steel cold rolling wastewater according to claim 1, characterized in that: The stirring mechanism comprises a round rod (13), wherein there are four round rods (13), the four round rods (13) are all rotatably connected to the top of the box body (1), the four round rods (13) all pass through the inner wall of the top of the box body (1), the four round rods (13) are distributed in a rectangular shape, the four round rods (13) are all fixedly connected to a plurality of stirring rods (14), the plurality of stirring rods (14) are distributed equidistantly around the circumference, the tops of the four stirring rods (14) are all fixedly connected to a first belt pulley (16), the same first belt (17) is wound between the four first belt pulleys (16), the top of one of the first belt pulleys (16) is fixedly connected to another second belt pulley (18), and the same second belt (19) is wound between the two second belt pulleys (18).

6. A reverse osmosis concentrated water pretreatment device for steel cold rolling wastewater according to claim 1, characterized in that: Four legs (2) are fixedly connected to the bottom of the box body (1), and the four legs (2) are distributed in a rectangular shape. A first water inlet (3) is provided on one side of the box body (1), a second water inlet (8) is provided on the top of the water tank (7), and a water outlet (9) is provided on one side of the bottom of the water tank (7).

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