Self-propelled slag-discharging bottom filter steam collection device, bottom filter and its working method

Abstract

This invention discloses a self-propelled slag discharge type bottom filter steam collection device, bottom filter and its working method, belonging to the field of blast furnace water flushing slag technology. In order to solve the problem that the slag particles that fall from the crane grab bucket for a long time are easy to crush the mobile steam collection hood, the self-propelled slag discharge type bottom filter steam collection device includes a support frame (4), a top cover (5) and a walking drive mechanism (2). The self-propelled slag discharge type bottom filter steam collection device includes a self-propelled cover (61), a self-propelled cover walking drive device (63) and a slag scraper (64). When the self-propelled cover moves along the longitudinal rail (61) during slag discharge, the slag scraper can scrape the slag particles that fall on the self-propelled cover plate and make them fall into the bottom filter. This can not only avoid the mobile steam collection hood being easily crushed by the accumulated slag, but also improve the working environment in the blast furnace water slag area, and provide equipment guarantee for the realization of green factory.

Description

Technical Field

[0001] This invention relates to the field of blast furnace water flushing slag technology, specifically a self-propelled slag unloading bottom filter steam collection device, a bottom filter, and a working method for a bottom filter. Background Technology

[0002] High-temperature molten slag is a major byproduct of blast furnace smelting, possessing extremely high value for solid waste resource reuse and economic benefits. Currently, the mainstream slag treatment method for steel enterprises both domestically and internationally is the water flushing process. High-speed water flow is used to break and quench the molten slag, transforming it into a loose slag-water mixture (hereinafter referred to as water slag). This mixture flows into a filtration tank through a flushing channel, where the liquid water is filtered through the filter layer. Solid, moist slag particles are left on top of the filter media. These particles are then grabbed by a bridge grab crane and transported by truck or conveyor belt.

[0003] Liquid slag has a high temperature (1350℃-1500℃). During the water quenching and granulation process, a large amount of slag undergoes continuous and intense heat transfer, generating a large amount of steam, especially in winter when the ambient temperature is low and the temperature difference is large, resulting in even greater steam generation. To prevent the generated steam from escaping and being directly emitted, a steam collection device is installed at the top of the filter tank. However, during the slag grabbing process, slag particles spill out from the grab bucket, causing significant slag accumulation at the top of the steam collection device. This can easily damage the equipment structure, preventing effective steam collection.

[0004] Specifically, such as Figure 1 As shown, the bottom filter tank 1 includes a first tank body 11 and a second tank body 12 arranged on the left and right sides. The bottom filter tank also includes a movable steam collection hood 15, which can move left and right on the first tank body 11 and the second tank body 12. A slag collection hopper 13 is arranged on the right side of the second tank body 12. During the process of the overhead crane grab bucket 14 grabbing the slag in the first tank body 11 and transporting it to the slag collection hopper 13, the slag in the overhead crane grab bucket 14 will fall onto the movable steam collection hood 15 on the second tank body 12. After long-term operation, the top of the movable steam collection hood 15 will accumulate slag seriously and be easily crushed. Summary of the Invention

[0005] To address the problem that slag particles spilled from the overhead crane grab bucket can easily damage the mobile steam collection hood, this invention provides a self-propelled slag-discharging bottom filter steam collection device, a bottom filter, and its operating method. The self-propelled slag-discharging bottom filter steam collection device includes a self-propelled cover, and a slag scraper can scrape off the slag particles that fall onto the cover and allow them to fall into the bottom filter. This not only prevents the mobile steam collection hood from being easily crushed by accumulated slag, but also improves the working environment in the blast furnace slag area, providing equipment support for achieving a green factory.

[0006] The technical solution adopted by this invention to solve its technical problem is:

[0007] A self-propelled slag-discharging bottom filter steam collection device includes a support frame, a top cover, and a walking drive mechanism. The top cover includes a fixed cover area and a slag leakage port arranged in a front-to-back direction. A self-propelled cover is provided on the slag leakage port. The self-propelled cover includes a cover plate, a moving bracket, and a translation drive mechanism connected in sequence. The translation drive mechanism can drive the cover plate to move in a horizontal direction, and the cover plate can close the slag leakage port.

[0008] A bottom filter includes a first tank and a second tank arranged on the left and right sides. The bottom filter also includes the above-mentioned self-propelled slag discharge type bottom filter steam collection device. The self-propelled slag discharge type bottom filter steam collection device can move left and right on the first tank and the second tank. The self-propelled slag discharge type bottom filter steam collection device can close the upper end of the first tank or the upper end of the second tank.

[0009] A method for operating the aforementioned bottom filter tank includes the following steps in sequence:

[0010] Step 1: The self-propelled slag-discharging bottom filter steam collection device moves to the right onto the second tank body, the cover plate seals the slag leakage port, the slag-water mixture enters the second tank body for slag-water filtration, the overhead crane grab bucket grabs the slag particles in the first tank body and transports them to the slag particle collection hopper. During the process of the overhead crane grab bucket moving directly above the second tank body, the overhead crane grab bucket is only located directly above the cover plate, and the overhead crane grab bucket is not located directly above the fixed cover area.

[0011] Step 2: The cover plate leaves the slag outlet, and the slag outlet is exposed. The slag scraper scrapes off the slag particles that fall onto the cover plate, and the scraped slag particles fall into the second tank from the slag outlet.

[0012] Step 3: The self-propelled slag-discharging bottom filter steam collection device moves to the left onto the first tank body, the cover plate seals the slag leakage port, the slag-water mixture enters the first tank body for slag-water filtration, the overhead crane grabs the slag particles in the second tank body and transports them to the slag particle collection hopper.

[0013] The beneficial effects of the present invention are as follows: The self-propelled slag unloading bottom filter steam collection device contains a self-propelled cover, and the slag scraper can scrape off the slag particles that fall onto the cover plate and make them fall into the bottom filter, which avoids the steam collection device being easily crushed by accumulated slag and easily damaged by collision with the crane grab bucket. It has the advantages of more feasible solution, more stable and reliable operation, and faster and more convenient maintenance, which improves the working environment in the blast furnace slag area and provides equipment guarantee for the realization of green factory. Attached Figure Description

[0014] The accompanying drawings, which form part of this application, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0015] Figure 1 This is a top view schematic diagram of a bottom filter and steam collection device in the existing technology.

[0016] Figure 2 This is a three-dimensional schematic diagram of the self-propelled slag-discharging bottom filter steam collection device described in this invention.

[0017] Figure 3 This is a partial overall schematic diagram of the support frame, self-propelled enclosure, and top enclosure.

[0018] Figure 4 It is an exploded view of the support frame, self-propelled enclosure, and top enclosure.

[0019] Figure 5 This is a front view schematic diagram of the bottom filter tank described in this invention.

[0020] Figure 6 yes Figure 5 Enlarged diagram of part A in the middle.

[0021] Explanation of reference numerals in the attached figures:

[0022] 1. Bottom filter tank; 2. Walking drive mechanism; 3. Transverse steel rail; 4. Support frame; 5. Top cover; 6. Self-propelled cover; 7. Slag particles; 8. Slag scraper; 9. Sealing curtain;

[0023] 11. First tank; 12. Second tank; 13. Slag collection hopper; 14. Overhead crane grab bucket; 15. Mobile steam collection hood;

[0024] 41. Horizontal beam; 42. Longitudinal beam;

[0025] 51. Fixed enclosure area; 52. Slag outlet; 53. Top plate; 54. End plate;

[0026] 61. Longitudinal rail; 62. Moving support; 63. Translation drive mechanism; 64. Cover plate. Detailed Implementation

[0027] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0028] For ease of understanding and description, the following description of the present invention uses absolute positional relationships. Unless otherwise specified, the directional term "above" indicates... Figure 5 The direction above, the directional word "down" indicates Figure 5 The lower side of the middle, the directional word "left" indicates Figure 5 The left side of the direction, the directional word "right" indicates Figure 5The right-hand direction in the text, the directional word "front" indicates perpendicular to. Figure 5 The direction of the paper and pointing inwards from the paper; the directional word "back" indicates perpendicular to the paper. Figure 5 The orientation of the paper is directed towards the outer edge of the paper. This invention is described from the perspective of a reader or user, but the aforementioned directional terms should not be construed as limiting the scope of protection of this invention. Regarding the dimensions and angles of the components, those skilled in the art can determine them specifically according to actual needs.

[0029] like Figures 2 to 6 As shown in the embodiment of the present invention, a self-propelled slag-discharging bottom filter steam collection device includes a support frame 4, a top cover 5, and a walking drive mechanism 2. The top cover 5 includes a fixed cover area 51 arranged in the front-back direction and a slag leakage port 52. A self-propelled cover 6 is provided on the slag leakage port 52. The self-propelled cover 6 includes a cover plate 64, a moving bracket 62, and a translation drive mechanism 63 connected in sequence. The translation drive mechanism 63 can drive the cover plate 64 to move back and forth, and the cover plate 64 can close the slag leakage port 52.

[0030] The support frame 4 has a rectangular structure and includes a crossbeam 41 and a longitudinal beam 42. The crossbeam 41 extends in the left and right direction, and the longitudinal beam 42 extends in the front and back direction. The lower end of the top cover 5 is matched and sealed to the upper end of the support frame 4. The walking drive mechanism 2 can drive the support frame 4 and the top cover 5 to move left and right.

[0031] The support frame 4 is also connected to wheels. The support frame 4 can be fitted with steel structure beams of the appropriate size according to the size of a single filter tank. Based on the total weight of the steam collection device, four wheels can be installed at the four corners of the support frame 4 for the overall movement of the support frame. The model of the transverse steel rail 3 pre-embedded at the top of the filter tank is determined according to the wheel flange distance.

[0032] To ensure the long-term use and structural stability of the steam collection device in a slag-water environment, the top cover 5 should be made of acid-resistant, alkali-resistant, and high-temperature-resistant materials, such as fiberglass. To improve the overall strength of the cover, the top cover 5 can be assembled in sections in the non-track travel direction, and its shape can be designed as a more structurally stable arch bridge.

[0033] The joints between the top cover 5 and the supporting frame 4, between the separately assembled cover sections, and between the top cover 5 and the cover plate 64 should have good sealing performance. For example, in areas with large gaps, a soft, corrosion-resistant sealing curtain 9 should be used to ensure that the steam generated during the operation of the filter tank does not escape. For instance, the edge of the cover plate 64 is connected to a sealing curtain 9. When the cover plate 64 closes the slag outlet 52, the sealing curtain 9 can seal the gap between the cover plate 64 and the slag outlet 52.

[0034] like Figures 4 to 5As shown, the top cover 5 includes a top plate 53 and an end plate 54. Both the top plate 53 and the cover plate 64 are upwardly protruding arched plates. Both the top plate 53 and the cover plate 64 extend along the front-back direction. The end plate 54 is located at the front and rear ends of the top plate 53, and the end plate 54 and the top plate 53 are sealed together.

[0035] The top plate 53 is a rectangular structure when viewed from above. The length of the top plate 53 is parallel to the front-to-back direction, and the width of the top plate 53 is parallel to the left-to-right direction. The slag outlet 52 along the front-to-back direction is located in the middle of the top plate 53. The slag outlet 52 is rectangular, and the length of the slag outlet 52 is parallel to the left-to-right direction. The length of the slag outlet 52 along the left-to-right direction is equal to the width of the top plate 53.

[0036] The upper ends of both the left and right sides of the support frame 4 are provided with longitudinal steel rails 61, which extend in the front-to-back direction. The cover plate 64 and the movable support 62 can move in the front-to-back direction on the longitudinal steel rails 61. The translation drive mechanism 63 can adopt an existing mechanism that can translate an object. For example, the translation drive mechanism 63 can contain a motor and wheels connected in sequence. The wheels are located on the longitudinal steel rails 61, and the translation drive mechanism 63 is connected to the movable support 62 through a wheel frame.

[0037] The translation drive mechanism 63 can drive the cover plate 64 and the moving bracket 62 forward to directly above the slag outlet 52. At this time, the cover plate 64 can close the slag outlet 52. The translation drive mechanism 63 can also drive the cover plate 64 and the moving bracket 62 backward to behind the slag outlet 52, that is, the cover plate 64 leaves the slag outlet 52. At this time, the cover plate 64 cannot close the slag outlet 52, and the slag outlet 52 is exposed.

[0038] like Figures 5 to 6 As shown, in order to scrape off the slag particles 7 that fall onto the cover plate 64, a scraper plate 8 is provided above the cover plate 64. As the cover plate 64 moves away from the slag outlet 52, the scraper plate 8 can scrape off the slag particles 7 on the cover plate 64 and let them fall into the slag outlet 52.

[0039] In the upright position, the scraper plate 8 extends in the left and right direction. The scraper plate 8 has a long strip structure. The length of the scraper plate 8 is greater than or equal to the length of the cover plate 64. The scraper plate 8 is connected and fixed to the support frame 4. The lower end of the scraper plate 8 matches the upper surface of the cover plate 64. The distance between the scraper plate 8 and the cover plate 64 is 1mm-10mm.

[0040] Both the cover plate 64 and the top plate 53 can be flat or arched. The width and position of the movable cover plate 64 and the slag outlet 52 can be determined according to the size of the grab bucket. The principle to be ensured is that the overall width of the grab bucket should be less than the width of the cover plate 64 and the slag outlet 52. For example, the width of the cover plate 64 and the slag outlet 52 can be 1m-3m.

[0041] like Figures 5 to 6 As shown, to avoid damage to the cover plate 64 caused by the structure and shape of the scraper plate 8 itself, the lower edge of the scraper plate 8 and the upper surface of the cover plate 64 must have similar shapes, and the scraper plate 8 should not be made of a hard-surfaced material. During the cleaning process, there may be localized areas with a large amount of spilled debris, requiring the scraper plate 8 to have a certain strength to ensure that the structure can still maintain its integrity under extreme working conditions.

[0042] To accommodate the placement of the scraper plate 8 and the width of the movable cover plate 64, stops can be installed on the longitudinal rail 61. To ensure stability and smoothness during equipment translation, the motors of the translation drive mechanism 63 should preferably be arranged on opposite sides, with two units installed above the support frame 4.

[0043] The following describes a bottom filter tank, such as... Figures 5 to 6 As shown, the bottom filter 1 includes a first pool body 11 and a second pool body 12 arranged on the left and right sides. The bottom filter 1 also includes the aforementioned self-propelled slag discharge type bottom filter steam collection device and slag particle collection hopper 13. The slag particle collection hopper 13 is located on the right side of the bottom filter 1. The self-propelled slag discharge type bottom filter steam collection device can move left and right on the first pool body 11 and the second pool body 12. The self-propelled slag discharge type bottom filter steam collection device can close the upper end of the first pool body 11 or the upper end of the second pool body 12.

[0044] A transverse steel rail 3 is provided on the top of the opposite side wall of the bottom filter tank 1. The transverse steel rail 3 is mainly used for the movement of the self-propelled slag discharge type bottom filter tank steam collection device between several adjacent filter tanks (first tank 11 and second tank 12). When the self-propelled slag discharge type bottom filter tank steam collection device is in the working position above the bottom filter tank 1, the gap between it and the concrete filter tank should be sealed to prevent steam leakage. The sealing of the surrounding crossbeams should consider multiple layers of soft seals to ensure the sealing effect even when there is movement error of the steam collection device. Daily wear must also be considered to ensure service life.

[0045] The working method of the above-mentioned bottom filter tank is described below, including the following steps:

[0046] Step 1: The blast furnace water flushing system issues an interlock control command, the walking drive mechanism 2 operates, and the self-propelled slag discharge bottom filter steam collection device moves to the right onto the second tank 12. The translation drive mechanism 63 moves the cover plate 64 forward to directly above the slag leakage port 52, sealing the slag leakage port 52. The self-propelled slag discharge bottom filter steam collection device seals the upper end of the second tank 12, and the walking drive mechanism 2 stops operating. After the self-propelled slag discharge bottom filter steam collection device stops, a stop command is issued, and the control system starts the flushing signal. The flushing water electric valve and the flushing ditch valve are opened, and the slag-water mixture enters the second tank 12 for slag-water filtration. After the flushing command for the second tank 12 is issued, the first tank 11 simultaneously starts the slag grabbing process, that is, the overhead crane grab bucket 14 grabs the slag particles 7 in the first tank 11 and transports them to the slag particle collection bucket 13, and then uses a belt or truck to transport them away, realizing the external transportation of slag particles. During the movement of the overhead crane grab bucket 14 directly above the second pool body 12, the overhead crane grab bucket 14 is only located directly above the cover plate 64, not directly above the fixed cover area 51. The slag particles 7 spilled by the overhead crane grab bucket 14 fall onto the cover plate 64, not onto the fixed cover area 51.

[0047] In addition, anti-collision steel columns can be added to prevent damage to the steam collection device caused by collision between the crane grab bucket and the steam collection device due to human error or malfunction of the crane's automation system.

[0048] Step 2: The translation drive mechanism 63 moves the cover plate 64 backward to behind the slag outlet 52, that is, the cover plate 64 leaves the slag outlet 52. At this time, the cover plate 64 cannot close the slag outlet 52. During the backward movement of the cover plate 64, the slag scraper 8 scrapes off the slag particles 7 that fall on the cover plate 64. The scraped slag particles 7 fall from the slag outlet 52 into the second pool 12. The cover plate 64 can be moved back and forth multiple times as needed to completely remove the slag particles on the cover plate 64.

[0049] Step 3: The blast furnace water flushing system issues an interlock control command, the walking drive mechanism 2 operates, and the self-propelled slag discharge bottom filter steam collection device moves to the left onto the first tank 11. The translation drive mechanism 63 moves the cover plate 64 forward to directly above the slag leakage port 52, sealing the slag leakage port 52. The self-propelled slag discharge bottom filter steam collection device seals the upper end of the first tank 11, and the walking drive mechanism 2 stops operating. After the self-propelled slag discharge bottom filter steam collection device stops, a stop command is issued, and the control system starts the slag flushing signal. The electric valve for flushing water and the valve for the flushing ditch are opened, and the slag-water mixture enters the first tank 11. After the slag flushing command is issued for the first tank 11, the second tank 12 simultaneously starts the slag grabbing process, that is, the overhead crane grab bucket 14 grabs the slag particles in the second tank 12 and transports them to the slag particle collection bucket 13, and then uses a belt or truck to transport them away, realizing the external transportation of slag particles.

[0050] Step 4: Steps 1 to 3 above can be repeated as needed to achieve continuous operation.

[0051] Observing the water level in the first tank 11 and the second tank 12 is crucial for switching working filters and for system process control. To ensure that the water level in the filter tank is lower than the filter tank wall during the sludge flushing process, scanning devices or cameras can be added to the steam collection device of the self-propelled sludge unloading bottom filter, the first tank 11, and the second tank 12 to dynamically measure the water level in the first tank 11 and the second tank 12 in real time during the sludge flushing process.

[0052] The above description is merely a specific embodiment of the present invention and should not be construed as limiting the scope of the invention. Therefore, substitutions of equivalent components, or equivalent changes and modifications made within the scope of protection of the present invention, should still fall within the scope of the present invention. Furthermore, the technical features, technical features and technical solutions, and technical solutions in the present invention can be freely combined and used.

Claims

1. A self-propelled steam collecting device for a bottom filter, characterized in that, The self-propelled slag discharge bottom filter steam collection device includes a support frame (4), a top cover (5) and a walking drive mechanism (2). The top cover (5) includes a fixed cover area (51) and a slag outlet (52) arranged in the front-to-back direction. A self-propelled cover (6) is provided on the slag outlet (52). The self-propelled cover (6) includes a cover plate (64), a moving bracket (62) and a translation drive mechanism (63) connected in sequence. The translation drive mechanism (63) can drive the cover plate (64) to move in the horizontal direction. The cover plate (64) can close the slag outlet (52). The upper ends of the left and right sides of the support frame (4) are provided with longitudinal steel rails (61), which extend in the front-back direction. The cover plate (64) and the movable bracket (62) can move in the front-back direction on the longitudinal steel rails (61). A scraper (8) is provided above the cover plate (64). As the cover plate (64) moves away from the slag outlet (52), the scraper (8) can scrape off the slag particles (7) on the cover plate (64) and let them fall into the slag outlet (52).

2. The self-removing bottomless filter steam collecting device according to claim 1, characterized in that, The support frame (4) has a rectangular structure and contains a crossbeam (41) and a longitudinal beam (42). The crossbeam (41) extends in the left and right direction, and the longitudinal beam (42) extends in the front and back direction. The lower end of the top cover (5) is matched and connected to the upper end of the support frame (4). The walking drive mechanism (2) can drive the support frame (4) and the top cover (5) to move left and right as a whole.

3. The self-propelled slag-discharging bottom filter steam collection device according to claim 2, characterized in that, The top cover (5) contains a top plate (53) and an end plate (54). Both the top plate (53) and the cover plate (64) are upward-protruding arched plates, and the end plate (54) is located at the front and rear ends of the top plate (53).

4. The self-propelled slag-discharging bottom filter steam collection device according to claim 3, characterized in that, The top plate (53) extends along the front-back direction. The length direction of the top plate (53) is parallel to the front-back direction, and the width direction of the top plate (53) is parallel to the left-right direction. The slag outlet (52) along the front-back direction is located in the middle of the top plate (53). The slag outlet (52) is rectangular, and the length of the slag outlet (52) along the left-right direction is equal to the width of the top plate (53).

5. The self-propelled slag-discharging bottom filter steam collection device according to claim 1, characterized in that, The scraper (8) is in an upright position, and the scraper (8) extends in the left and right direction. The scraper (8) is connected and fixed to the support frame (4). The lower end of the scraper (8) matches the upper surface of the cover plate (64). The distance between the scraper (8) and the cover plate (64) is 1mm-10mm.

6. The self-propelled slag-discharging bottom filter steam collection device according to claim 1, characterized in that, The edge of the cover plate (64) is connected to a sealing curtain (9). When the cover plate (64) closes the slag outlet (52), the sealing curtain (9) can seal the gap between the cover plate (64) and the slag outlet (52).

7. A bottom filter tank, characterized in that, The bottom filter (1) includes a first pool body (11) and a second pool body (12) arranged on the left and right sides. The bottom filter (1) also includes the self-propelled slag discharge type bottom filter steam collection device as described in claim 1. The self-propelled slag discharge type bottom filter steam collection device can move left and right on the first pool body (11) and the second pool body (12). The self-propelled slag discharge type bottom filter steam collection device can close the upper end of the first pool body (11) or the upper end of the second pool body (12).

8. A method for operating the bottom filter tank according to claim 7, characterized in that, The operation method of the bottom filter tank includes the following steps in sequence: Step 1: The self-propelled slag discharge bottom filter steam collection device moves to the right onto the second tank body (12), and the cover plate (64) seals the slag leakage port (52). The slag-water mixture enters the second tank body (12) for slag-water filtration. The crane grab bucket (14) grabs the slag particles in the first tank body (11) and transports them to the slag particle collection bucket (13). During the process of the crane grab bucket (14) moving directly above the second tank body (12), the crane grab bucket (14) is only located directly above the cover plate (64) and is not located directly above the fixed cover area (51). Step 2: The cover plate (64) leaves the slag outlet (52), the slag outlet (52) is exposed, the slag scraper (8) scrapes off the slag particles (7) that fall on the cover plate (64), and the scraped slag particles (7) fall into the second pool (12) from the slag outlet (52); Step 3: The self-propelled slag discharge bottom filter steam collection device moves to the left onto the first tank body (11), and the cover plate (64) seals the slag leakage port (52). The slag-water mixture enters the first tank body (11) for slag-water filtration. The crane grab bucket (14) grabs the slag particles in the second tank body (12) and transports them to the slag particle collection bucket (13).

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