Efficient filter layer structure system of blast furnace slag bottom filter tank

Abstract

The utility model belongs to the technical field of metallurgy, and particularly relates to an efficient filter layer structure system of a blast furnace slag bottom filter tank. A water distribution main pipe is arranged at the bottom of a filter, a plurality of symmetrical small holes are formed in the water distribution main pipe, a plurality of symmetrical water distribution branch pipes are arranged on the two sides of the water distribution main pipe, a plurality of symmetrical small holes are formed in the water distribution branch pipes, a plurality of buttresses are arranged at the bottoms of the water distribution branch pipes, and the buttresses are fixed to the bottom face of the filter. The filter layers are arranged on the water distribution main pipe and the water distribution branch pipes, and the structural size of a filter material of each filter layer of the filter is designed, so that impurities such as fine slag and slag cotton can be effectively prevented from entering the cobblestone filter layer, the problem that the filter material of the filter is easy to harden is solved, and the chromaticity of water filtered by the filter is cleaner after the filter layer structure of the filter is used; the service life of the cobblestone filter layer is greatly prolonged, the filter effect is improved, and the maintenance cost of the filter tank is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to metallurgical technical field, concretely relates to a kind of high-efficiency filter bed structure system of blast furnace slag bottom filter. BACKGROUND

[0002] Current domestic blast furnace slag water flushing slag process can be mainly divided into mechanical screening method and bottom filter sedimentation method according to the form of slag water separation, and the typical representative process of mechanical screening method water flushing slag process is rotary drum method, and the typical representative process of bottom filter sedimentation method water flushing slag process is environmental protection bottom filter method, and the water flushing slag process of environmental protection bottom filter method can adapt to foamy slag and large slag quantity under various furnace conditions, and can adapt to water slag under various furnace temperatures, and in addition, the water flushing slag process of environmental protection bottom filter method can reduce filter pool water supplement and the use of compressed air, and reduce energy consumption, but in actual production process, due to the unreasonable design and use of filter pool and filter bed structure system of environmental protection bottom filter method, there is that filter material in filter pool is easy to be hardened, and the overall filtration capacity is prone to attenuation, which causes the filter function of filter layer in filter pool to be reduced, and the reasons are as follows: ①the shape of goose egg stone layer in filter layer is not regular enough, and the particle size is large, after vibration scouring, the porosity between goose egg stones cannot be maintained, which leads to the reduction of filtration speed, ②the surface of goose egg stone layer filter material is not smooth or not clean enough, and over time, impurities such as slag cotton are easily caught, which makes the hardening speed of filter layer obviously accelerate, and further leads to the reduction of filtration speed, and at the same time, since each layer of filter layer is directly stacked together, once the filter material is hardened, the filter material cannot be quickly replaced, and the bottom of the pool needs to be thoroughly cleaned. CONTENT OF UTILITY MODEL

[0003] In view of the problems of prior art, the utility model aims at providing a kind of high-efficiency filter bed structure system of blast furnace slag bottom filter, which can effectively solve the problem of the reduction of filter function caused by the hardening of filter layer in filter pool due to slag cotton, increase the cleaning degree of filter layer, and prolong the service life of filter layer.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical scheme:

[0005] A kind of high-efficiency filter bed structure system of blast furnace slag bottom filter, it is characterized by including filter pool, the bottom of the filter pool is provided with a water distribution main pipe, the upper portion of the water distribution main pipe is provided with a plurality of symmetrical small holes, the two sides of the water distribution main pipe are provided with a plurality of symmetrical water distribution branch pipes, the water distribution branch pipes are provided with a plurality of symmetrical small holes, the bottom of the water distribution branch pipes is provided with a plurality of branch piers, the branch piers are fixed to the bottom surface of the filter pool, the water distribution main pipe and the water distribution branch pipes are provided with filter layer five, the upper layer of the filter layer five is provided with filter layer four, the upper layer of the filter layer four is provided with filter layer three, the upper portion of the filter layer three is provided with a grid-shaped protection beam, the grid-shaped protection beam is welded with high-efficiency filter plate through steel structure branch pier, a plurality of slits with a width of 2mm are formed in the high-efficiency filter plate, the high-efficiency filter plate is provided with a filter screen, and the filter screen is provided with filter layer two with a particle size.

[0006] Preferably, the filter layer five is 40mm-60mm cobble, the filter layer four is 20mm-40mm cobble, the filter layer three is 12mm-20mm cobble, and the filter layer two is 2mm-5mm quartz sand.

[0007] Preferably, the Φ10mm small holes are arranged on the upper part of the water distribution main pipe within the range of-35°~35°, and the Φ13mm small holes are arranged on the upper part of the water distribution branch pipe within the range of-45°~45°.

[0008] Preferably, the Φ10mm small holes of the water distribution main pipe are provided with semicircular ring-shaped steel plates.

[0009] The beneficial effects of the present application are as follows:

[0010] 1. The high-efficiency filter layer structure system of the blast furnace slag bottom filter can effectively block the fine slag and slag cotton and other sundries from entering the cobble filter layer, thereby greatly improving the service life of the cobble filter layer, improving the filtering effect of the system, and reducing the maintenance cost of the filter.

[0011] 2. The high-efficiency filter layer structure system of the blast furnace slag bottom filter can ensure the filtering effect of the cobble filter layer by injecting high-pressure water into the water distribution main pipe after the filtering operation is completed, and by reversely washing the residual slag cotton in the filter layer through the water distribution branch pipe.

[0012] 3. The high-efficiency filter layer structure system of the blast furnace slag bottom filter can not only increase the backwashing water pressure and improve the backwashing effect, but also prevent large-particle sundries in the water slag filter layer from entering the main pipe and blocking the holes. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 The high-efficiency filter layer structure system of the blast furnace slag bottom filter is shown in the schematic view.

[0014] Figure 2 The filter layer structure is shown in the schematic view.

[0015] Figure 3 The filter layer water distribution pipe structure is shown in the schematic view.

[0016] Figure 4 Structure diagram of the embodiment of the present application;

[0017] Figure 5 Structure diagram of the grid protection beam of the present application.

[0018] Meaning of reference numerals in the drawing:

[0019] 1, filter pool, 2, filter layer two, 3, filter layer three, 4, filter layer four, 5, filter layer five, 6, buttress, 7, water distribution main, 8, water distribution branch, 9, small hole, 10, semicircular ring steel plate, 11, high efficiency filter plate, 12, filter screen, 13, grid protection beam. DETAILED DESCRIPTION

[0020] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of the present application.

[0021] As Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 The utility model discloses a blast furnace slag bottom filter high efficiency filter layer structure system as shown in the drawings, the water distribution main 7 and the water distribution branch 8 on the bottom of filter pool 1 are provided with the filter layer five 5 of pebble of the particle size of 40mm-60mm, and the thickness is 400mm, the upper layer of filter layer five 5 is provided with the filter layer four 4 of pebble of the particle size of 20mm-40mm, and the thickness is 300mm, the upper layer of filter layer four 4 is provided with the filter layer three 3 of pebble of the particle size of 12mm-20mm, and the thickness is 100mm, the filter layer two 2 of quartz sand of the particle size of 2mm-5mm and the thickness of 300mm is set up on high efficiency filter plate 11 and filter screen 12, the filter layer two 2 is laid with water slag layer, the quartz sand particle size of filter layer two 2 is minimum, and the water permeability is minimum, and it is the first layer of filtration simultaneously, can effectively block the most slag cotton and other impurities of the relatively large particle in water slag, the particle size and the thickness of the pebble of filter layer three 3, filter layer four 4, filter layer five 5 increase gradually from top to bottom, and the slag cotton impurities in the water slag of filter layer three 3, filter layer four 4, filter layer five 5 have been mostly cleaned up, and the pebble filter layer is good in water permeability, so that the water after water slag filtration is relatively clean.

[0022] The filter bed three 3 in the filter tank 1 is provided with a grid-shaped protection beam 13, the grid-shaped protection beam 13 is welded with a high-efficiency filter plate 11, the high-efficiency filter plate 11 is provided with a plurality of 2mm-wide pores, the high-efficiency filter plate 11 is provided with a filter screen 12, the filter screen 12 is provided with a quartz sand filter bed two 2 with a particle size of 2mm-5mm and a thickness of 300mm, and the operator lays the water residue to be filtered on the filter bed two 2, and the water residue is filtered in sequence through the filter bed two 2, the filter screen 12 and the high-efficiency filter plate 11, so that most of the residue cotton in the water residue can be filtered clean, the grid-shaped protection beam 13 can effectively bear the high-efficiency filter plate 11, the filter screen 12, the quartz sand filter bed two 2 and the water residue to be filtered, and meanwhile, the operator can conveniently replace the quartz sand filter bed two 2 without damaging the cobblestone filter bed three 3, the filter bed four 4 and the filter bed five 5, thereby further increasing the filtering effect of the water residue.

[0023] The bottom of the filter tank 1 is provided with a water distribution main pipe 7, the upper part of the water distribution main pipe 7 is provided with a plurality of Φ10mm small holes 9 on both sides within a range of -35°~35°, both sides of the water distribution main pipe 7 are provided with a plurality of water distribution branch pipes 8, the upper part of the water distribution branch pipes is provided with a plurality of Φ13mm small holes on both sides within a range of -45°~45°, and the bottom of the water distribution branch pipes 8 is provided with a plurality of branch piers 6, after the filtering operation is completed, the operator can periodically introduce high-pressure water from the water distribution main pipe 7, the high-pressure water is filled to cause the water distribution branch pipes 8 to shake, and the branch piers 6 are stable, thereby reducing the pipeline vibration in the process of flushing the residue, the filtering is more stable, the high-pressure water is periodically cleaned through the Φ10mm small holes 9 of the water distribution main pipe 7 and the Φ13mm small holes 9 of the water distribution branch pipes 8, the long-time filtered cobblestone filter bed three 3, the filter bed four 4, the filter bed five 5 and the quartz sand filter bed two are periodically cleaned, the water quality color of the filter tank is more clean, the Φ10mm small holes 9 of the water distribution main pipe 7 are covered with a semicircular ring-shaped steel plate 10, the water pressure of the backwashing of the water distribution main pipe 7 is further increased, the backwashing effect is improved, large-particle foreign matters in the water residue filter layer are prevented from entering the main pipe, the small-particle residue cotton attached to the cobblestone filter bed is effectively cleaned, the service life of the cobblestone filter layer is prolonged, the filtering effect of the filter tank is improved, and the maintenance cost of the filter tank is reduced.

[0024] The preferred embodiments of the present application are described above, it should be noted that, for those skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, these improvements and refinements should also be considered as the protection scope of the present application.

Claims

1. A high-efficiency filter layer structure system of a blast furnace slag underdrain filter tank, comprising a filter tank (1), characterized in that: The filter tank (1) bottom is provided with a water distribution main pipe (7), the water distribution main pipe (7) is provided with a plurality of symmetrical small holes (9), the water distribution main pipe (7) is provided with a plurality of symmetrical water distribution branch pipes (8) on both sides, the water distribution branch pipe (8) is provided with a plurality of symmetrical small holes (9), the water distribution branch pipe (8) bottom is provided with a plurality of branch piers (6), the branch piers (6) are fixed with the filter tank (1) bottom surface, the water distribution main pipe (7) and the water distribution branch pipe (8) are provided with filter layer five (5), the upper layer of the filter layer five (5) is provided with filter layer four (4), the upper layer of the filter layer four (4) is provided with filter layer three (3), the upper layer of the filter layer three (3) is provided with grid-shaped protection beam (13), the grid-shaped protection beam (13) is welded with high efficiency filter plate (11) through steel structure branch pier, a plurality of 2mm wide slits are formed in the high efficiency filter plate (11), the high efficiency filter plate (11) is provided with filter screen (12), the filter screen (12) is provided with filter layer two (2) with particle size.

2. The high-efficiency filter layer structure system of a blast furnace slag bottom filter according to claim 1, characterized in that: The filter layer five (5) is 40mm-60mm, the thickness is 400mm, the filter layer four (4) is 20mm-40mm, the thickness is 300mm, the filter layer three (3) is 12mm-20mm, the height is 100mm, the filter layer two (2) is 2mm-5mm, the height is 300mm.

3. The high-efficiency filter layer structure system of a blast furnace slag bottom filter according to claim 1, characterized in that: The water distribution main pipe (7) upper part is provided with Φ10mm small hole (9) on both sides in the range of-35°~35°, the water distribution branch pipe (8) upper part is provided with Φ13mm small hole (9) on both sides in the range of-45°~45°.

4. The high-efficiency filter layer structure system of a blast furnace slag bottom filter according to claim 1, characterized in that: The water distribution main pipe (7) is provided with semicircular ring steel plate (10) on the Φ10mm small hole (9).

Images