CN110947209A - High-efficient filtration system of blast furnace slag end-filtration method - Google Patents
High-efficient filtration system of blast furnace slag end-filtration method Download PDFInfo
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- CN110947209A CN110947209A CN201911348323.9A CN201911348323A CN110947209A CN 110947209 A CN110947209 A CN 110947209A CN 201911348323 A CN201911348323 A CN 201911348323A CN 110947209 A CN110947209 A CN 110947209A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
- B01D24/02—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration
- B01D24/10—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with the filter bed stationary during the filtration the filtering material being held in a closed container
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
- B01D24/002—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with multiple filtering elements in parallel connection
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D24/00—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof
- B01D24/007—Filters comprising loose filtering material, i.e. filtering material without any binder between the individual particles or fibres thereof with multiple filtering elements in series connection
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Abstract
The invention discloses a high-efficiency filtering system for a blast furnace slag bottom filtration method, which comprises a filtering tank (1) in a space rectangular coordinate system with an X, Y, Z axis as a coordinate axis, wherein a modularized filtering layer (3) and a drainage structure (4) are arranged in the bottom of the filtering tank (1), the modularized filtering layer (3) comprises a plurality of filtering modules (35), the drainage structure (4) comprises a main drainage pipe (41) and a branch drainage pipe (42) which are horizontally arranged, the interior of the branch drainage pipe (42) is communicated with the interior of the main drainage pipe (41), and the side wall of the branch drainage pipe (42) is provided with a water through hole. This high-efficient filtration system of blast furnace slag end filter method contains the modularization filter layer, and the corresponding filtration module of independent quick replacement can appear after the problem that hardens in the filter media in the modularization filter layer, avoids consumeing the manpower and gets into the filter tank and spend the filter media that hardens of plenty of time clearance, improves filter effect and maintenance efficiency by a wide margin.
Description
Technical Field
The invention relates to the field of metal smelting equipment, in particular to a high-efficiency filtering system by a blast furnace slag bottom filtering method.
Background
High-temperature liquid slag (1350-1500 ℃) is generated during blast furnace smelting, about 7 hundred million tons of molten iron are produced in China every year, and about 2.5 million tons of high-temperature liquid slag are generated.
The slag is treated by a precipitation filtration method (commonly called bottom filtration method) water slag process at home and abroad. The method comprises the steps of carrying out hydraulic slag flushing in front of a blast furnace, crushing slag by water quenching to obtain a loose slag-water mixture (often called water slag), enabling water slag to enter a filter tank through a slag flushing channel, filtering liquid water through a filter layer in the filter tank, leaving solid wet slag particles at the bottom of the filter tank, and then grabbing, loading and transporting the slag particles by a bridge type grab crane. The slag particles (with the particle size of 0.2mm-3mm) obtained after water quenching have wide application, can be used as cement materials, heat insulation fillers and the like, and make full use of the slag.
Whether the filter layer can quickly filter the water granulated slag or not is achieved, the separation of liquid water and slag particles is efficiently achieved, and the filter layer is of great importance to the production of the water granulated slag process. The filtering layer is too tight, so that the filtering efficiency is low, the separation of a slag-water mixture cannot be rapidly completed, the slag grabbing condition with water occurs during slag grabbing, and the cyclic utilization of water resources cannot be fully realized; the filter layer is too sparse, so that fine slag particles cannot be isolated, and the fine slag particles and liquid water enter the circulating water system together, so that the pipeline and the valve of the circulating water system are seriously abraded, and the smooth operation of the water granulated slag process is influenced.
The blast furnace slag flushing water contains slag wool with certain components, and the slag wool is easy to block the filtering gap of the filtering layer in the filtering process of realizing slag-water separation, so that the filtering layer is hardened, the hardened filtering layer loses the filtering function, and the production of a water slag system cannot be smoothly carried out.
Disclosure of Invention
In order to improve the filtering effect, the invention provides a high-efficiency filtering system of a blast furnace slag bottom filtering method, which comprises a modularized filtering layer, wherein a filtering medium in the modularized filtering layer can be independently and quickly replaced by a corresponding filtering module after hardening, so that the phenomenon that the hardened filtering medium is cleaned in a filtering tank by consuming a large amount of time when manpower is consumed is avoided, and the filtering effect and the maintenance efficiency are greatly improved.
The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a high-efficient filtration system of method is strained at bottom of blast furnace slag, in the space rectangular coordinate system who uses the X, Y, Z axle as the coordinate axis, this high-efficient filtration system of method is strained at bottom of blast furnace slag includes the filtering ponds, be equipped with modularization filter layer and drainage structures in the bottom of filtering ponds, the modularization filter layer is located drainage structures's top, the modularization filter layer contains a plurality of filter module, a plurality of filter module are the regular ranks along X axle and Y axle direction and arrange, two adjacent filter module connect, drainage structures contains the drainage that the level set up and is responsible for and drainage branch pipe, many drainage branch pipe are located the both sides that the drainage was responsible for, the inside of drainage branch pipe and the inside intercommunication that the drainage was responsible for, be equipped with the through-hole.
The main drainage pipe is arranged along the X-axis direction, the branch drainage pipes are arranged along the Y-axis direction, and the branch drainage pipes are uniformly arranged at intervals along the X-axis direction.
The filtering tank comprises a bottom plate and a side wall, a plurality of convex blocks are arranged between the bottom plate of the filtering tank and the modularized filtering layer, and the convex blocks are positioned between the drainage branch pipes along the X-axis direction.
The filtering module comprises a filtering box body and a filtering medium, the filtering medium is positioned in the filtering box body, the filtering box body comprises a bottom grating plate and four side grating plates, and the upper end of the filtering box body is in an open state.
The filter medium comprises a plurality of filter layers which are stacked along the Z-axis direction, each filter layer contains a granular filter body, and the upper end surface of the filter box body is flush with the upper surface of the filter medium.
Along from the direction of making progress down, the diameter of filtering the body in the filtration layering diminishes gradually, the superiors filter the body in the filtration layering for the slag grain or the quartz sand that the diameter is the same with the slag grain after the blast furnace slag granulation.
The thickness of the filtration layer gradually decreases in the direction from the bottom to the top.
Still be equipped with filter layer protection architecture in the filter tank, filter layer protection architecture and modularization filter layer range upon range of from top to bottom are connected.
The filter layer protection structure comprises a first steel beam and a second steel beam, the first steel beam is connected with the second steel beam to form a lattice-shaped structure, the first steel beam is parallel to an X axis, the second steel beam is parallel to a Y axis, the distance between every two adjacent first steel beams is smaller than the size of a grab bucket of the grab bucket crane, and the distance between every two adjacent second steel beams is smaller than the size of the grab bucket crane.
The invention has the beneficial effects that:
1. the filtering box body formed by the grating plates can effectively support the filtering medium without influencing the filtering speed.
2. The filtering medium in the filtering box body forms a gradient configuration with the diameter gradually reduced from bottom to top, the stability of the filtering medium is good, the small-diameter filtering medium on the upper layer cannot be taken away by filtered water, and the efficient operation of the filtering system is fully ensured.
3. The filter module of cuboid shape is covered with the filtering ponds bottom, and the corresponding filter module of independent quick replacement can appear after the hardened problem in the filter media, avoids consumeing the manpower and gets into the filtering ponds and spend the hardened filter media of plenty of time clearance, improves maintenance efficiency by a wide margin.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.
FIG. 1 is a sectional view of a high efficiency filtration system for bottom filtration of blast furnace slag according to the present invention.
FIG. 2 is a perspective view of the high efficiency filtration system of the present invention for bottom filtration of blast furnace slag.
Fig. 3 is a schematic view of a drainage structure.
FIG. 4 is a schematic view of a modular filter layer.
Fig. 5 is a cross-sectional view of a filtration module.
Fig. 6 is a schematic view of a filter housing.
Fig. 7 is a schematic view of a filter layer protective structure.
1. A filtration tank; 2. a filter layer protection structure; 3. a modular filter layer; 4. a drainage structure;
21. a first steel beam; 22. a second steel beam;
31. a side grid plate; 32. a bottom grid plate; 33. cobblestones; 34. slag particles; 35. a filtration module;
41. a main drainage pipe; 42. a drain branch pipe.
Detailed Description
It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the embodiments with reference to the attached drawings.
A high-efficiency filtering system of a blast furnace slag bottom filtering method is characterized in that in a space rectangular coordinate system taking an X, Y, Z axis as a coordinate axis, the high-efficiency filtering system of the blast furnace slag bottom filtering method comprises a filtering tank 1, a modularized filtering layer 3 and a drainage structure 4 are arranged in the bottom of the filtering tank 1, the modularized filtering layer 3 is positioned above the drainage structure 4, the modularized filtering layer 3 is in a rectangular plate-shaped structure, the modularized filtering layer 3 is parallel to a plane where an X axis and a Y axis are positioned, the modularized filtering layer 3 comprises a plurality of filtering modules 35, the filtering modules 35 are arranged in regular rows and columns along the X axis and the Y axis, two adjacent filtering modules 35 are connected in a seamless mode, the drainage structure 4 comprises a main drainage pipe 41 and branch drainage pipes 42 which are horizontally arranged, the branch drainage pipes 42 are positioned on two sides of the main drainage pipe 41, and the insides of the branch drainage pipes 42 are communicated, the side walls of the branch drain pipes 42 are provided with water through holes, as shown in fig. 1 and 2.
In this embodiment, the filtering tank 1 comprises a bottom plate and a side wall, the bottom plate and the side wall of the filtering tank 1 enclose a cubic filtering space, and the bottom plate and the side wall enclose a steel frame concrete structure. The main drain pipe 41 penetrates through the side wall of the filter tank 1, the main drain pipe 41 is welded with the branch drain pipes 42, the outer diameter of the main drain pipe 41 is larger than that of the branch drain pipes 42, the main drain pipe 41 is arranged along the X-axis direction, the branch drain pipes 42 are arranged along the Y-axis direction, the branch drain pipes 42 are uniformly arranged at intervals along the X-axis direction, and water-permeable through holes are formed in appropriate positions of the branch drain pipes 42, as shown in fig. 1 to 3.
In the present embodiment, along the Z-axis direction, a plurality of bumps are disposed between the bottom plate of the filtering tank 1 and the modular filtering layer 3, and the height of the bumps is greater than or equal to the outer diameter of the main drainage pipe 41. The projections are located between the drain legs 42 in the X-axis direction. The modularized filter layer 3 is abutted to the projection, and the weight of the modularized filter layer 3 is borne by the projection, so that the modularized filter layer 3 is prevented from being in direct contact with the bottom plates of the main drainage pipe 41 and the branch drainage pipe 42, and the filtering efficiency is improved. The modular filter layer 3 is matched with the filter tank 1, and a set distance (namely the height of the lug) exists between the bottom plate of the filter tank 1 and the modular filter layer 3, as shown in fig. 1.
In the present embodiment, the distance between two adjacent filter modules 35 is zero, the filter modules 35 are all distributed over the entire modular filter layer 3, each filter module 35 has the same size and structure, the filter modules 35 have a substantially rectangular plate-like structure, and the filter modules 35 include a filter box filled with filter media, the filter box includes a bottom grid plate 32 and four side grid plates 31, and the upper end of the filter box is in an open state, as shown in fig. 4 to 6. The bottom grating plate 32 and the side grating plate 31 are formed by cutting grating plates, and the bottom grating plate 32 and the side grating plate 31 can be made of stainless steel plates or other corrosion-resistant materials, or can be made of ordinary steel plates by brushing anti-rust paint.
In this embodiment, the filter medium includes a plurality of filter layers stacked in the Z-axis direction, each filter layer includes a granular filter, and an upper end surface of the filter box is flush with an upper surface of the filter medium. The uppermost filter body in the filter layers is slag particles 34 after blast furnace slag granulation, and the rest filter bodies in the filter layers are cobblestones 33.
Namely, the filter bodies in the top filtering layer of the plurality of filtering layers are slag particles 34 after blast furnace slag granulation, and the filter bodies in the rest filtering layers of the plurality of filtering layers are cobblestones 33. The filter body in the top filtration layer may also be quartz sand or other filter medium having a diameter close to the diameter of the slag particles 34.
In this embodiment, the diameters of the filter bodies in the filter layers gradually decrease along the direction from bottom to top, and the diameters of the filter bodies in the same filter layer are uniform. The thickness of the filtration layer gradually decreases in the direction from bottom to top, as shown in fig. 5.
In this embodiment, a filter layer protection structure 2 is further disposed in the filtration tank 1, and the filter layer protection structure 2 is connected with the modular filter layer 3 in an up-down stacked manner. The filter layer protection structure 2 comprises a first steel beam 21 and a second steel beam 22, the first steel beam 21 and the second steel beam 22 are connected to form a lattice-shaped structure, the first steel beam 21 is parallel to an X axis, the second steel beam 22 is parallel to a Y axis, the distance between every two adjacent first steel beams 21 is smaller than the size of a grab bucket of the grab bucket crane, and the distance between every two adjacent second steel beams 22 is smaller than the size of the grab bucket crane. In order to avoid the damage of the filter layer by the grab crane during the slag grabbing process, as shown in fig. 7.
According to the invention, the diameter of the filter body in the filtering layers is gradually reduced along the direction from bottom to top, the stability of the filter medium is good, the small-diameter filter medium on the upper layer cannot be taken away by filtered water, and the efficient operation of the filter system is fully ensured. The filter box that the grid board is constituteed can effectively support filter medium under the prerequisite that does not influence filter speed, and the filter module of cuboid shape is covered with the filtering ponds space, and the independent quick replacement of being convenient for after the problem that hardens appears in the filter medium improves maintenance efficiency by a wide margin.
For convenience of understanding and description, the absolute position relation is expressed by combining a space rectangular coordinate system, wherein the direction of a Z axis in the space rectangular coordinate system corresponds to the vertical direction, and planes of an X axis and a Y axis in the space rectangular coordinate system correspond to a horizontal plane. The present invention has been described in terms of the user's viewing angle, but the above terms of orientation should not be interpreted or interpreted as limiting the scope of the invention.
The above description is only exemplary of the invention and should not be taken as limiting the scope of the invention, so that the invention is intended to cover all modifications and equivalents of the embodiments described herein. In addition, the technical features and the technical schemes, and the technical schemes can be freely combined and used.
Claims (9)
1. The high-efficiency filtering system for the blast furnace slag bottom filtration method is characterized by comprising a filtering tank (1) in a spatial rectangular coordinate system with an X, Y, Z axis as a coordinate axis, wherein a modular filtering layer (3) and a drainage structure (4) are arranged in the bottom of the filtering tank (1), the modular filtering layer (3) is positioned above the drainage structure (4), the modular filtering layer (3) comprises a plurality of filtering modules (35), the filtering modules (35) are regularly arranged in rows and columns along the X-axis direction and the Y-axis direction, two adjacent filtering modules (35) are connected, the drainage structure (4) comprises a main drainage pipe (41) and branch drainage pipes (42) which are horizontally arranged, the branch drainage pipes (42) are positioned at two sides of the main drainage pipe (41), and the inside of the branch drainage pipes (42) is communicated with the inside of the main drainage pipe (41), the side wall of the branch drain pipe (42) is provided with a water through hole.
2. The high-efficiency filtering system for the bottom filtration of the blast furnace slag according to claim 1, wherein the main drainage pipe (41) is arranged along the X-axis direction, the branch drainage pipes (42) are arranged along the Y-axis direction, and the branch drainage pipes (42) are uniformly arranged at intervals along the X-axis direction.
3. The high-efficiency blast furnace slag bottom filtration system according to claim 1, wherein the filter tank (1) comprises a bottom plate and a side wall, and a plurality of projections are arranged between the bottom plate of the filter tank (1) and the modular filter layer (3), and are positioned between the drain branch pipes (42) along the X-axis direction.
4. The high-efficiency blast furnace slag bottom filtration system according to claim 1, wherein the filter module (35) comprises a filter box body and a filter medium, the filter medium is positioned in the filter box body, the filter box body comprises a bottom grid plate (32) and four side grid plates (31), and the upper end of the filter box body is in an open state.
5. The high-efficiency blast furnace slag bottom filtration system according to claim 4, wherein the filter medium comprises a plurality of filter layers which are stacked along the Z-axis direction, each filter layer comprises a granular filter body, and the upper end surface of the filter box body is flush with the upper surface of the filter medium.
6. The blast furnace slag bottom filtration efficient filtering system according to claim 5, wherein the diameter of the filter body in the filtering layers is gradually reduced along the direction from bottom to top, and the filter body in the uppermost filtering layer is slag particles (34) after the blast furnace slag is granulated or quartz sand with the same diameter as the slag particles (34).
7. The high efficiency blast furnace slag bottom filtration system according to claim 1, wherein the thickness of the filtration layer is gradually reduced in a direction from bottom to top.
8. The high-efficiency filtering system for the bottom filtration of the blast furnace slag according to claim 1, wherein a filtering layer protecting structure (2) is further arranged in the filtering tank (1), and the filtering layer protecting structure (2) is connected with the modular filtering layer (3) in an up-and-down stacked manner.
9. The high-efficiency blast furnace slag bottom filtration system according to claim 8, wherein the filter layer protection structure (2) comprises first steel beams (21) and second steel beams (22), the first steel beams (21) and the second steel beams (22) are connected to form a lattice structure, the first steel beams (21) are parallel to an X axis, the second steel beams (22) are parallel to a Y axis, the distance between two adjacent first steel beams (21) is smaller than the size of a grab bucket of the grab bucket crane, and the distance between two adjacent second steel beams (22) is smaller than the size of the grab bucket crane.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911348323.9A CN110947209A (en) | 2019-12-24 | 2019-12-24 | High-efficient filtration system of blast furnace slag end-filtration method |
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| CN201911348323.9A CN110947209A (en) | 2019-12-24 | 2019-12-24 | High-efficient filtration system of blast furnace slag end-filtration method |
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| CN110947209A true CN110947209A (en) | 2020-04-03 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114046663A (en) * | 2021-09-28 | 2022-02-15 | 中节能(福州)环保能源有限公司 | Automatic slag grabbing control system |
| CN114053768A (en) * | 2021-11-24 | 2022-02-18 | 中冶京诚工程技术有限公司 | Method for preventing hardening of filter material of blast furnace water slag bottom filtering system |
-
2019
- 2019-12-24 CN CN201911348323.9A patent/CN110947209A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114046663A (en) * | 2021-09-28 | 2022-02-15 | 中节能(福州)环保能源有限公司 | Automatic slag grabbing control system |
| CN114053768A (en) * | 2021-11-24 | 2022-02-18 | 中冶京诚工程技术有限公司 | Method for preventing hardening of filter material of blast furnace water slag bottom filtering system |
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