Slag breaking device, cyclone sedimentation tank and cleaning method for steelmaking wastewater treatment

Abstract

The application discloses a kind of steelmaking sewage treatment with board consolidation slag breaking device, cyclone sedimentation tank and cleaning method, breaking device includes: track is by four angle steel long cuboid frame structure;Base is set in the bottom of track;Spiral main shaft is coaxially placed in track inside, the bottom end of spiral main shaft is conical, the lower section of spiral main shaft is provided with blade;Rotary power mechanism includes drive reduction device, drive reduction device is connected to spiral main shaft by coupling I, coupling II, spiral upper shaft;Hoisting mechanism includes connecting rope, one end is connected to drive reduction device, the other end is connected to the travelling crane on the top of track;Spiral main shaft is used to rotate under the driving of drive reduction device, and move downward under its gravity to break the board consolidation slag in cyclone sedimentation tank;Hoisting mechanism is used to lift spiral main shaft along track upward.It solves the problem that nitrogen gas stirring is used to clean board consolidation slag in cyclone sedimentation tank in prior art, and the effect is poor.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of continuous casting turbid water treatment, and particularly relates to a hardened slag breaking device for steelmaking sewage treatment, a cyclone sedimentation tank and a cleaning method. BACKGROUND

[0002] The cyclone sedimentation tank is a common treatment method for oxidized iron scale-containing sewage in steelmaking and rolling engineering in the metallurgical industry. In the long-term production process, part of the oxidized iron scale is not completely precipitated and is deposited on the bottom ring beam through overflow. If it is not cleaned in time, the oxidized iron scale will accumulate more and more and be hardened, thereby affecting the turbid water quality. At present, nitrogen gas stirring is mostly used to clean the hardened slag at the bottom of the cyclone sedimentation tank, or manual cleaning is performed during shutdown maintenance. Because the hardened slag is large and hard, the nitrogen gas stirring effect is poor, time-consuming and labor-intensive, and energy is wasted seriously. SUMMARY

[0003] The purpose of the application is to provide a hardened slag breaking device for steelmaking sewage treatment, a cyclone sedimentation tank and a cleaning method, so as to solve the problem of poor effect of using nitrogen gas stirring to clean the hardened slag in the cyclone sedimentation tank in the prior art.

[0004] The application adopts the following technical scheme: the hardened slag breaking device for steelmaking sewage treatment comprises:

[0005] a track composed of four vertically arranged angle steels to form a hollow cuboid frame structure;

[0006] a base arranged at the bottom of the track;

[0007] a spiral main shaft coaxially arranged in the track, the bottom end of the spiral main shaft being arranged to pass through the center of the base, the bottom end of the spiral main shaft being conical, and the outer wall of the lower segment of the spiral main shaft being provided with blades;

[0008] a rotating power mechanism comprising a driving speed reducer connected to the spiral main shaft through a shaft coupling I, a shaft coupling II and a spiral upper shaft;

[0009] a hoisting mechanism comprising a connecting rope, one end of the connecting rope being connected to the driving speed reducer and the other end of the connecting rope being connected to a travelling crane located at the top of the track;

[0010] the base is used to mount the track above the working surface of the cyclone sedimentation tank to be cleaned; the spiral main shaft is used to rotate under the driving of the driving speed reducer and move downward under its own gravity to break the hardened slag in the cyclone sedimentation tank; and the hoisting mechanism is used to lift the spiral main shaft upward along the track after each cleaning.

[0011] Further, the lower end of the spiral upper shaft is provided with a flange II, and the upper end of the spiral main shaft is provided with a flange III, and the spiral upper shaft is connected to the spiral main shaft through the flange II and the flange III.

[0012] Further, the lower end of the spiral upper shaft is provided with a flange II, and the upper end of the spiral main shaft is provided with a flange III, and the spiral upper shaft is connected to the spiral main shaft through the flange II and the flange III.

[0013] Further, the lower end of the spiral upper shaft is provided with a flange II, and the upper end of the spiral main shaft is provided with a flange III, and the spiral upper shaft is connected to the spiral main shaft through the flange II and the flange III.

[0014] The second technical scheme adopted by the present application is a cyclone sedimentation tank with a plate slag cleaning function for steelmaking sewage treatment, which uses a plate slag breaking device for steelmaking sewage treatment, comprising:

[0015] A cyclone sedimentation tank is located below the ground, which has a U-shaped channel, the center of the U-shaped channel has a sewage inlet opening upward, both ends of the U-shaped channel are provided with sewage outlets opening downward, the top of both ends of the U-shaped channel is a platform, and the U-shaped channel is provided with a ring beam near the bottom position, and the part of the U-shaped channel bottom below the ring beam is a sedimentation chamber.

[0016] A plurality of reserved holes are arranged in a circular array on the platform.

[0017] A plurality of pumps are arranged around the platform, and each pump is used to pump the sewage in the sedimentation chamber out of the sewage outlet.

[0018] The base of the plate slag breaking device for steelmaking sewage treatment is installed on one reserved hole of the platform, and is used to be placed in each reserved hole in turn to break the plate slag above the ring beam in the cyclone sedimentation tank.

[0019] A grab bucket is used to enter from the sewage inlet to clean and remove the plate slag in the sedimentation chamber.

[0020] The third technical scheme adopted by the present application is a plate slag cleaning method of a cyclone sedimentation tank for steelmaking sewage treatment, comprising the following contents:

[0021] S1, the sewage containing iron oxide scale is introduced from the sewage inlet, the sewage is discharged from the sewage outlet after passing through the sedimentation chamber, and the sediment in the sewage is deposited in the sedimentation chamber.

[0022] S2, the plate slag breaking device is placed at one of the reserved holes, and the plate slag above the ring beam is broken by the rotation of the spiral main shaft.

[0023] S3, break the bottom of the hardening slag by moving the hardening slag breaking device to another reserved hole through the driving screw main shaft;

[0024] S4, repeat steps S2 and S3 until all reserved hole positions are used up;

[0025] S5, periodically use the grab bucket to extend into the deposition chamber from the sewage inlet and clean and take out the hardening slag therein.

[0026] The beneficial effects of the present application are: through the hardening slag breaking device for steelmaking sewage treatment, the driving speed reducer is started to drive the screw main shaft to rotate to break the bottom hardening slag, and the screw main shaft moves downward under the action of gravity, so that the purpose of efficient cleaning is achieved, and the labor degree and energy consumption are reduced. Because the rotation speed of the screw main shaft is low (generally 12 r / min), the agitation of the water body is small, which is beneficial to the deposition of the iron oxide skin in the sewage. By using the downward movement of the screw main shaft, the long-term condensed slag can be loosened, and then the slag falls into the deposition chamber at the bottom of the cyclone tank, and finally is taken out by the grab bucket. The problem of difficult cleaning of the hardening slag at the bottom of the cyclone sedimentation tank, long-term accumulation of the overflow port, and poor sewage sedimentation effect is solved. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 is a structural schematic view of the hardening slag breaking device for steelmaking sewage treatment of the present application;

[0028] Figure 2 is Figure 1 a partial enlarged view;

[0029] Figure 3 is a use state schematic view of the hardening slag breaking device for steelmaking sewage treatment of the present application.

[0030] Among them, 1. driving speed reducer, 2. flange I, 3. coupling I, 4. connecting cylinder, 41. upper flange, 42. cylinder body, 43. lower flange, 5. coupling II, 6. spiral upper shaft, 7. flange III, 8. screw main shaft, 9. blade, 10. track, 11. base, 12. flange II, 13. platform, 14. sewage inlet, 15. reserved hole, 16. pump, 17. sewage outlet, 18. ring beam, 19. deposition chamber, 20. ground, 21. connecting flange, 22. hardening slag breaking device.

DETAILED DESCRIPTION

[0031] The present application will be described in detail below in combination with the drawings and specific embodiments.

[0032] The present application provides a hardening slag breaking device for steelmaking sewage treatment, such as Figure 1 and Figure 2As shown, including track 10, base 11, spiral main shaft 8, rotating power mechanism and hoisting mechanism.

[0033] Wherein, the track 10 is composed of four vertical angle steel into a hollow cuboid frame structure. Base 11 is arranged at the bottom of the track 10. Base 11 is used to install the track 10 to the working surface above the cyclone sedimentation tank to be cleaned.

[0034] Spiral main shaft 8 is coaxially arranged in the inside of track 10, the bottom end of spiral main shaft 8 is out of the center of base 11, the bottom end of spiral main shaft 8 is tapered, the lower wall of spiral main shaft 8 is provided with blade 9. Rotating power mechanism includes a drive reduction device 1, drive reduction device 1 is connected to spiral main shaft 8 through coupling I3, coupling II5 and spiral upper shaft 6. Spiral main shaft 8 is used to rotate under the drive of drive reduction device 1 and move downward under its own gravity to break the hardened slag in the cyclone sedimentation tank.

[0035] Hoisting mechanism includes a connecting rope, one end of which is connected to the drive reduction device 1, and the other end is connected to the travelling crane located at the top of the track 10. Hoisting mechanism is used to lift the rotating power mechanism and spiral main shaft 8 together along the track 10 after the end of single cleaning. After changing the working position, the spiral main shaft 8 can be rotated downward to break the hardened slag in other positions of the cyclone sedimentation tank.

[0036] The rotating power mechanism of the application rises and falls on the corresponding track, uses the rotation of the spiral main shaft, and the spiral blade welded at the lower part can loosen the long-term condensed slag, thereby achieving the purpose of efficient cleaning, reducing the labor intensity of personnel and nitrogen consumption. The motor drives the reduction gear to rotate the spiral main shaft to clean the accumulated slag at the bottom of the sedimentation tank. The device is simple to manufacture, has high slag cleaning efficiency, stable operation and low maintenance cost.

[0037] In some embodiments, the lower end of the spiral upper shaft 6 is provided with a flange II 12, the upper end of the spiral main shaft 8 is provided with a flange III 7, and the spiral upper shaft 6 is connected to the spiral main shaft 8 through the flange II 12 and the flange III 7. The flange is connected by screw, which is convenient for installation.

[0038] In some embodiments, a connecting cylinder 4 is further included, the connecting cylinder 4 has an upper flange 41 and a lower flange 43, the upper flange 41 and the lower flange 43 are connected through a tapered cylinder body 42; the lower end of the drive reduction device 1 is provided with a flange II, the flange II is detachably connected with the upper flange 41, and the lower flange 43 is sleeved on the rotating main shaft 8 close to one end of the flange III 7. The rotating power mechanism and the spiral main shaft part are protected by the connecting cylinder 4, which prolongs the service life of the device.

[0039] In some embodiments, the rotating main shaft 8 comprises two detachable sections connected by two connecting flanges 21. In actual use, the rotating main shaft can be appropriately lengthened or shortened according to the depth of the cyclone tank, and multiple rotating main shafts can be connected in series through the connecting flanges 21 to extend the working length, facilitating better breaking and cleaning of the bottomed-up slags.

[0040] The application also provides a cyclone sedimentation tank with a bottomed-up slag cleaning function for steelmaking sewage treatment, which uses a bottomed-up slag breaking device for steelmaking sewage treatment, as shown in the accompanying drawings, and comprises a cyclone sedimentation tank, multiple reserved holes 15, multiple pumps 16, a bottomed-up slag breaking device for steelmaking sewage treatment, and a grab bucket. Figure 3

[0041] The cyclone sedimentation tank is located below the ground 20 and has a U-shaped channel with a sewage inlet 14 opening upward in the center of the U-shaped channel, sewage outlets 17 opening downward at both ends of the U-shaped channel, a platform 13 at the top of both ends of the U-shaped channel, a ring beam 18 arranged near the bottom of the U-shaped channel, and a deposition chamber 19 located below the ring beam 18 at the bottom of the U-shaped channel.

[0042] The multiple reserved holes 15 are arranged in a circular array on the platform 13. The reserved holes 15 are the passing positions of the downward movement of the rotating screw main shaft 8, and the screw main shaft 8 can reach the position where the bottomed-up slags are formed in the cyclone sedimentation tank by moving downward through the reserved holes 15.

[0043] The multiple pumps 16 are arranged around the platform 13, and each pump 16 is used to continuously pump the sewage in the deposition chamber 19 out of the sewage outlet 17, ensuring the circulation of water in the cyclone sedimentation tank.

[0044] The base 11 of the bottomed-up slag breaking device for steelmaking sewage treatment can be installed above any reserved hole 15 of the platform 13, ensuring that the screw main shaft 8 can pass through the reserved hole 15. In actual work, the bottomed-up slag breaking device for steelmaking sewage treatment is installed at each reserved hole 15, which can basically crush all the bottomed-up slags in the cyclone sedimentation tank above the ring beam 18. The crushed bottomed-up slags fall into the deposition chamber 19 and are then taken out by the grab bucket from the sewage inlet 14, and the bottomed-up slags in the deposition chamber 19 are cleaned and removed at regular intervals.

[0045] The application also provides a method for cleaning bottomed-up slags in a cyclone sedimentation tank for steelmaking sewage treatment, which comprises the following steps:

[0046] S1. The sewage containing iron oxide scale is introduced from the sewage inlet, the sewage is discharged from the sewage outlet 17 after passing through the deposition chamber 19, and the sediment in the sewage is deposited in the deposition chamber 19.

[0047] ​S2, when the sediment in the deposition chamber 19 is accumulated to exceed the ring beam 18, the solidified slag breaking device 22 is placed in one of the reserved holes 15, and the solidified slag above the ring beam 18 is broken by the downward movement of the rotation of the screw main shaft 8; the broken solidified slag falls into the deposition chamber 19;

[0048] S3, the screw main shaft 8 is lifted by the travelling crane, and the solidified slag breaking device is moved to another reserved hole 15 to break the solidified slag below;

[0049] S4, steps S2 and S3 are repeated until all the reserved hole positions are used up;

[0050] S5, the grab bucket is used to extend into the deposition chamber 19 from the sewage inlet 14 at regular intervals, and the solidified slag in the deposition chamber 19 is cleaned out.

[0051] The method for installing the solidified slag breaking device 22 to the reserved hole 15 is as follows: first, a pouring lifting rail foundation is made on the top concrete platform 13 of the cyclone sedimentation tank, and then a lifting rail 10 is installed, which is perpendicular to the pouring foundation plane. According to the design drawing, the lifting rail 10 is assembled together. Figure 1 The device is installed in the lifting rail 10 by the travelling crane above the cyclone sedimentation tank from top to bottom, and it will stay at a certain position due to the obstruction of the bottom solidified slag, then the motor is started, the screw shaft is operated, and it walks downward under the action of gravity. The process is repeated to completely and efficiently clean the bottom solidified slag of the cyclone sedimentation tank.

[0052] Embodiment

[0053] A solidified slag cleaning device for the bottom of a cyclone sedimentation tank, comprising a rail 10 made of four equal-length equilateral angle steels; a driving reduction device 1 adopting a cycloidal pin wheel vertical speed reducer, a screw upper shaft 6 and a connecting cylinder 4 made of Ф273x10 seamless pipes, a screw main shaft 8 made of Ф273x10 seamless pipes, and a bottom tapered body welded with blades 9 with uniform pitch; the width of the blades 9 is 100mm, and the blades 9 are made of wear-resistant low-alloy plates; the middle of the screw main shaft 8 is connected by a connecting flange 21 of the same specification; the length of each screw main shaft 8 is 3000mm, which can be appropriately added during use according to the cleaning depth; and the device is assembled together according to the design drawing.

[0054] The rail 10 is made of equilateral angle steels 160x160x12, with a rail length of 610mm and a height of 3000mm, and is fixed to the top concrete platform 13 of the cyclone sedimentation tank. The two connecting flanges 21 on each screw main shaft 8 are concave on one side with a size of Ф273mm and a depth of 10mm, and convex on the other side with a size of Ф272mm and a height of 8mm, to ensure the perpendicularity of the flange end face and the shaft during the welding of the screw shaft, and to ensure the concentricity of the connection of two or more screw shafts.

[0055] The connecting cylinder 4 is made of 20 mm medium plate, and the side length is 600 mm, which is 10 mm smaller than the size of the track 10 to ensure that the slag cleaning device freely falls and rises in the track 10. The size of the spiral main shaft 8 is 6 mm smaller than the size of the lower flange 43 of the connecting cylinder to eliminate the friction caused by the swing of the spiral main shaft 8 during rotation. The bottom blade width of the spiral main shaft 8 is 100 mm, the pitch is 300 m, and the welding height is 1000 mm.

[0056] The present application uses the board slag breaking device for steelmaking sewage treatment to drive the spiral main shaft to rotate through the starting drive reduction device, so as to break the bottom board slag, and the spiral main shaft moves downward under the action of gravity, thereby achieving the purpose of efficient cleaning and reducing the labor degree and energy consumption of personnel. Because the rotation speed of the spiral main shaft is low (generally 12 r / min), the stirring of the water body is small, which is beneficial to the precipitation of the iron oxide skin in the sewage. The long-term condensed slag block can be loosened by the downward movement of the spiral main shaft, and then the slag block falls into the deposition chamber at the bottom of the cyclone tank, and finally is taken out by the grab bucket. The problem that the bottom board slag of the cyclone sedimentation tank is difficult to clean, and the long-term accumulation blocks the overflow port, which affects the poor sewage sedimentation effect is solved.

Claims

1. A hardened slag breaking device for steelmaking wastewater treatment, characterized by, It comprises: a track (10) composed of four vertical angle steels to form a hollow cuboid frame structure; a base (11) arranged at the bottom of the track (10); a spiral main shaft (8) coaxially arranged inside the track (10), the bottom end of the spiral main shaft (8) penetrates the center of the base (11), the bottom end of the spiral main shaft (8) is conical, and the outer wall of the lower section of the spiral main shaft (8) is provided with a blade (9); a rotating power mechanism, which comprises a driving speed reducer (1), the driving speed reducer (1) is connected to the spiral main shaft (8) through a shaft coupling I (3), a shaft coupling II (5) and a spiral upper shaft (6); a hoisting mechanism, which comprises a connecting rope, one end of the connecting rope is connected to the driving speed reducer (1), and the other end of the connecting rope is connected to a travelling crane located at the top of the track (10); the base (11) is used for mounting the track (10) above the working surface of the cyclone sedimentation tank to be cleaned; the spiral main shaft (8) is used for rotating under the driving of the driving speed reducer (1) and moving downward under the action of its own gravity to break the hardened slag in the cyclone sedimentation tank; and the hoisting mechanism is used for lifting the spiral main shaft (8) along the track (10) upward after the single cleaning is completed.

2. The agglomerated slag breaking device for steelmaking wastewater treatment according to claim 1, characterized by, The lower end of the spiral upper shaft (6) is provided with a flange II (12), the upper end of the spiral main shaft (8) is provided with a flange III (7), and the spiral upper shaft (6) is connected to the spiral main shaft (8) through the flange II (12) and the flange III (7).

3. The agglomerated slag breaking device for steelmaking wastewater treatment according to claim 2, characterized by, It further comprises a connecting cylinder (4), the connecting cylinder (4) has an upper flange (41) and a lower flange (43), the upper flange (41) and the lower flange (43) are connected through a conical cylinder body (42); the lower end of the driving speed reducer (1) is provided with a flange I (2), the flange I (2) is detachably connected with the upper flange (41), and the lower flange (43) is sleeved on the spiral main shaft (8) close to one end of the flange III (7).

4. The agglomerated slag breaking device for steelmaking wastewater treatment according to claim 3, characterized by, The spiral main shaft (8) comprises two detachable sections connected through two connecting flanges (21).

5. A cyclone sedimentation tank for steelmaking wastewater treatment with slag removal function, characterized in that, The hardened slag breaking device for steelmaking wastewater treatment according to any one of claims 1-4 comprises: a cyclone sedimentation tank located below the ground (20), which has a U-shaped channel, the center of the U-shaped channel has a wastewater inlet (14) opening upward, both ends of the U-shaped channel are provided with wastewater outlets (17) opening downward, the top of both ends of the U-shaped channel is a platform (13), the U-shaped channel is provided with a ring beam (18) close to the bottom position, and the part of the U-shaped channel below the ring beam (18) is a deposition chamber (19); a plurality of reserved holes (15) arranged in a circular array on the platform (13); a plurality of pumps (16) arranged around the platform (13); each pump (16) is used for pumping wastewater in the deposition chamber (19) out of the wastewater outlet (17). The base (11) of the agglomerated slag breaking device for steelmaking sewage treatment is installed on a reserved hole (15) of the platform (13); it is used to be placed in each reserved hole (15) in turn to break the agglomerated slag above the ring beam (18) in the cyclone sedimentation tank; A grab bucket is used to enter from the sewage inlet (14) to clean and take out the agglomerated slag in the deposition chamber (19).

6. A method for cleaning the hardened sludge of a cyclone settling basin for steelmaking wastewater treatment, characterized by, The cyclone sedimentation tank with agglomerated slag cleaning function for steelmaking sewage treatment based on claim 5 comprises the following contents: S1, the sewage containing iron oxide scale is introduced from the sewage inlet, the sewage is discharged from the sewage outlet (17) after passing through the deposition chamber (19), and the sediment in the sewage is deposited in the deposition chamber (19); S2, the agglomerated slag breaking device (22) is placed at one of the reserved holes (15), and the agglomerated slag above the ring beam (18) is broken by the downward movement of the rotation of the screw main shaft (8); S3, the screw main shaft (8) is lifted by the travelling crane, and then the agglomerated slag breaking device is moved to another reserved hole (15) to break the agglomerated slag below; S4, repeat steps S2 and S3 until all the reserved hole positions are used up; S5, the grab bucket is used to enter the deposition chamber (19) from the sewage inlet (14) periodically, and the agglomerated slag in it is cleaned and taken out.

Images