Dust removal device for steel ladle hot repair

Abstract

The utility model belongs to the technical field of environmental protection and dust removal, and relates to a dust removal device for steel ladle hot repair, which comprises a support base, and a steel ladle hot repair operation platform, a dust removal cover car, a fan and a bag type dust remover which are sequentially arranged on the support base from left to right, dust collection hoods fixedly mounted on the supporting base are arranged at the two ends of the dust collection hood vehicle, an inlet of the bag type dust collector is connected with the dust collection hoods through air inlet pipes, and an outlet of the bag type dust collector is connected with a fan through an air outlet pipe; a steel ladle base used for containing a steel ladle is arranged between the dust collection covers located at the two ends of the dust collection cover vehicle, the dust collection cover vehicle comprises a movable cover arranged in the length direction of the supporting base, one end of the movable cover is fixedly connected with the dust collection cover close to the draught fan, and the other end of the movable cover telescopically moves in the length direction of the supporting base. And the maximum telescopic moving range can be close to a dust collection cover of the steel ladle hot repair operation platform so as to cover the steel ladle.

Description

Technical Field

[0001] This utility model belongs to the field of environmental protection and dust removal technology, and relates to a dust removal device for hot repair of steel ladles. Background Technology

[0002] The ladle is the transport vessel for molten steel at high temperatures during the converter to continuous casting process in steelmaking. It also serves as a container for ladle refining. The molten steel undergoes various physical and chemical reactions within the ladle. Due to the extremely high temperatures and repeated erosion by the molten steel, the refractory materials are continuously corroded, severely impacting the ladle's lifespan and operator safety. Therefore, ladle hot repair is an essential and crucial step in the steelmaking process. During hot repair, the high temperatures generate large amounts of flue gas and dust, causing serious pollution to workers' work areas and polluting the environment when released into the atmosphere.

[0003] Currently, traditional dust removal solutions often employ a combination of mobile hoods and centralized dust collection pipelines. This approach requires ensuring sufficient pressure within the pipelines at all times, but the poor sealing of the mobile pipelines leads to excessive energy consumption. Furthermore, the pipeline network is complex, making pipeline layout difficult and construction challenging; a single dust collection system can often only perform dust removal operations on one ladle. Additionally, some companies directly integrate dust collection pipelines into the existing tertiary dust collection system in the factory, without professional analysis and design of the flue gas flow field. This increases the workload of the tertiary dust collection system, making it difficult to guarantee its effectiveness. Utility Model Content

[0004] In view of this, the purpose of this utility model is to provide a dust removal device for hot repair of steel ladles, which can remove dust from two or more steel ladles at the same time. When hot repair of steel ladles is carried out, the dust removal mode is turned on. The sealing characteristics of the dust removal device are used to avoid excessive wind intake and dust overflow. When there is no task, the dust removal device fan operates at low frequency or stops, which can greatly save operating costs and energy consumption.

[0005] To achieve the above objectives, this utility model provides the following technical solution:

[0006] A dust removal device for hot repair of steel ladles includes a support base and a hot repair operation platform for steel ladles, a dust removal hood cart, a fan and a bag filter arranged from left to right on the support base.

[0007] Both ends of the dust collection vehicle are equipped with dust collection hoods fixedly installed on the support base, and the inlet of the bag filter is connected to the dust collection hood through an air inlet pipe, and the outlet of the bag filter is connected to the fan through an air outlet pipe.

[0008] A ladle base for placing a ladle is provided between the dust collection hoods located at both ends of the dust collection hood vehicle. The dust collection hood vehicle includes a movable hood arranged along the length of the support base. One end of the movable hood is fixedly connected to the dust collection hood near the fan, and the other end extends and retracts along the length of the support base. The maximum extension and retraction range can reach the dust collection hood near the ladle hot repair operation platform to cover the ladle.

[0009] Furthermore, at least two dust removal hoods are provided on the support base, evenly distributed along the width of the support base, to facilitate simultaneous hot repair of multiple ladles.

[0010] Furthermore, the dust collection hood located near the fan is closed on the side close to the fan, and has an observation and operation hole.

[0011] The dust hood located near the ladle hot repair operation platform has two open sides along the length of the support base to facilitate the operation of the ladle hot repair operation platform.

[0012] Furthermore, the movable cover is a portal telescopic scissor frame structure, which is formed by connecting several portal frames and scissor frame structures. A heat-resistant door sealing plate is installed on the inner side of the portal telescopic scissor frame structure, and it unfolds or folds with the portal telescopic scissor frame structure.

[0013] Furthermore, several pairs of wheel hubs are installed at the bottom of the portal telescopic scissor frame structure, and the support base is provided with steel profiles that match the wheel hubs to serve as guide plates;

[0014] The pair of wheel hubs closest to the ladle hot repair operation platform are hub motor drive wheels, which drive the portal telescopic scissor frame structure to unfold or fold.

[0015] Furthermore, the bag filter is a folded filter cartridge with a spark catcher at the inlet, a dust hopper at the bottom, and a screw conveyor at the bottom of the dust hopper.

[0016] Furthermore, the ladle hot repair operation platform is a steel frame structure with a ladder at the bottom, steel plates and guardrails on the top, and a rotating boom installed.

[0017] The beneficial effects of this utility model are as follows:

[0018] This utility model provides a dust removal device for hot ladle repair, which significantly improves dust removal efficiency, reduces energy consumption, and enhances operational convenience and safety. The device innovatively integrates a hot ladle repair operation platform, a dust removal hood cart, a fan, and a bag filter arranged sequentially on a support base, enabling simultaneous dust removal of two or more ladles. The movable hood design of the dust removal hood cart allows for flexible extension and retraction according to the ladle's position, creating an effective sealed space that prevents the leakage of high-temperature flue gas and dust, while also reducing the intake of draft air and improving dust removal efficiency.

[0019] The innovation of this technical solution lies in its unique dust collection hood cart design and baghouse dust collector configuration. Dust collection hoods are installed at both ends of the cart, connecting to the baghouse dust collector via inlet ducts to form a complete dust collection system. The movable hood adopts a portal telescopic scissor frame structure, which is not only structurally stable but also allows for easy telescopic movement to adapt to the location requirements of different ladles. The baghouse dust collector uses folded filter cartridges, and a spark trap net is installed at the inlet to effectively prevent sparks from entering the dust collector and causing safety hazards. The ash hopper and screw conveyor at the bottom facilitate dust collection and handling. Furthermore, the design of the ladle hot repair operation platform fully considers the convenience and safety of operation, providing workers with a good working environment.

[0020] The practicality of this invention lies in its ability to simultaneously perform dust removal operations on multiple ladles, significantly improving dust removal efficiency and reducing energy consumption. When not in use, the dust removal device's fan can operate at low frequency or be shut down, further saving operating costs and energy consumption. Simultaneously, the dust removal device has a simple structure, is easy to install, and has low maintenance costs, making it suitable for various ladle hot repair scenarios. The implementation of this invention not only improves the environmental quality of workers' work areas but also reduces air pollution from flue gas dust, resulting in significant social and economic benefits.

[0021] Other advantages, objectives, and features of this invention will be set forth in part in the description which follows, and in part will be apparent to those skilled in the art from the following examination and study, or may be learned from practice of this invention. The objectives and other advantages of this invention can be realized and obtained through the following description. Attached Figure Description

[0022] To make the objectives, technical solutions, and advantages of this utility model clearer, the preferred embodiments of this utility model will be described in detail below with reference to the accompanying drawings, wherein:

[0023] Figure 1 This is a schematic diagram of the structure of a dust removal device for hot repair of a steel ladle in the embodiment;

[0024] Figure 2 for Figure 1 Sectional view of AA along direction A;

[0025] Figure 3 for Figure 1 Sectional view from direction B;

[0026] Figure 4 This is a schematic diagram of the structure of a dust removal device for hot repair of a steel ladle (with steel ladle) in the embodiment;

[0027] Figure 5 for Figure 4 Top view;

[0028] Figure 6 This is a schematic diagram illustrating the principle of hot repair and dust removal in the ladle in the embodiment. Figure 1 ;

[0029] Figure 7 This is a schematic diagram illustrating the principle of hot repair and dust removal in the ladle in the embodiment. Figure 2 ;

[0030] Figure 8 This is a schematic diagram illustrating the principle of hot repair and dust removal in the ladle in the embodiment. Figure 3 ;

[0031] Figure 9 This is a schematic diagram illustrating the principle of hot repair and dust removal in the ladle in the embodiment. Figure 4 ;

[0032] Figure 10 This is a schematic diagram illustrating the principle of hot repair and dust removal in the ladle in the embodiment. Figure 5 .

[0033] Attached reference numerals: 1-Ladle hot repair operating platform; 1-1-Ladder; 1-2-Rotating boom; 2-Support base; 3-Ladle base; 4-Ladle; 5-Dust collector hood; 5-1-Dust suction hood; 5-2-Wheel hub; 5-3-Gateway; 6-Fan; 7-Bag collector; 7-1-Folded filter cartridge; 7-2-Dust hopper; 7-3-Screw conveyor; 7-4-Spark filter; 8-Inlet duct; 9-Outlet duct; 10-Observation and operation port. Detailed Implementation

[0034] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments, and various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of this utility model. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0035] The accompanying drawings are for illustrative purposes only and are schematic diagrams, not actual pictures. They should not be construed as limiting the present invention. To better illustrate the embodiments of the present invention, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual product dimensions. It is understandable to those skilled in the art that some well-known structures and their descriptions may be omitted in the drawings.

[0036] In the accompanying drawings of this utility model, the same or similar reference numerals correspond to the same or similar components. In the description of this utility model, it should be understood that if terms such as "upper," "lower," "left," "right," "front," and "rear" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this utility model. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0037] Please see Figures 1-5 This is a dust removal device for hot repair of steel ladles, including a support base 2 placed on the ground and two dust removal hood carts 5, a bag filter 7 and a fan 6 arranged on the support base 2. The support base 2 is a steel frame structure, including four parallel steel sections. The two dust removal hood carts 5 are respectively arranged on the four steel sections of the support base 2 along the width direction of the support base 2.

[0038] In another embodiment, the support base 2 may be provided with 6 or 8 or other even numbers of steel sections, thereby arranging more dust removal hoods 5, and thus enabling multiple steel ladle hot repairs to be carried out simultaneously.

[0039] Each of the dust removal hoods includes a movable hood arranged along the length of the support base. The movable hood is composed of a door panel 5-3 parallel to the length of the steel profile, a wheel hub 5-2 arranged at the bottom of the door panel, and a surface heat-resistant door sealing plate arranged at the top of the door panel, forming a telescopic and movable dust removal hood 5. The inner side of the door panel 5-3 is also equipped with a heat-resistant door sealing plate, and the heat-resistant door sealing plate is made of a high-temperature resistant flexible material, which can be telescopically moved and folded together with the door panel 5-3.

[0040] The dust removal hood 5 is equipped with two dust suction hoods 5-1 fixedly installed on the support base 2 on two sides perpendicular to the length direction of the steel section (i.e., both ends of the dust removal hood 5). The dust suction hoods 5-1 are connected to the inlet of the bag filter 7 through an air inlet pipe 8. The ladle base 3 is set on the support base 2 between the two dust suction hoods 5-1 of the dust removal hood 5. The ladle 4 can be hoisted onto it, thereby realizing the encirclement of the ladle 4 by the dust removal hood 5, and thus realizing dust removal during hot repair of the ladle.

[0041] Furthermore, the air inlet pipe 8 is laid on the side of the support base 2, and the axial direction of the steel ladle base 3 is perpendicular to the length direction of the steel section of the support base 2.

[0042] One end of the movable cover is fixedly connected to the dust collection cover 5-1 near the fan, and the other end extends and retracts along the length of the support base, with the maximum extension and retraction range reaching the dust collection cover 5-1 near the ladle hot repair operation platform to cover the ladle; the movable cover is a portal telescopic scissor frame structure, formed by connecting several portal frames (door rows 5-3) and scissor frame structures, and a heat-resistant door sealing plate is installed on the inner side of the portal telescopic scissor frame structure, which unfolds or folds with the portal telescopic scissor frame structure.

[0043] Specifically, such as Figure 4 and Figure 5 As shown, the dust removal hood 5 and the bag filter 7 are respectively arranged at both ends of the support base 2. A spark filter 7-4 is installed at the inlet of the bag filter 7. The inlet flue gas is turned back downwards to filter the sparks in the flue gas.

[0044] To increase the filtration area per unit space of the bag filter 7, this embodiment preferentially adopts a folded filter cartridge 7-1. During operation, the collected dust falls into the ash hopper 7-2, and is then transported out of the device by a screw conveyor 7-3. A ton bag or a dust truck can be used for docking.

[0045] The fan 6 is located between the dust collection hood 5 and the bag filter 7, and is connected to the outlet of the bag filter 2 through the outlet pipe 9.

[0046] Furthermore, a ladle hot repair operation platform 1 is also provided on the side of the dust removal hood vehicle 5 away from the bag dust collector 7. It is also a steel frame structure. The lower part of the ladle hot repair operation platform 1 is provided with a ladder 1-1, the upper part is covered with steel plates and guardrails, and a rotating boom 1-2 is installed to lift the tools for ladle hot repair.

[0047] The dust hood 5-1 near the ladle hot repair operation platform 1 has two open sides along the length of the steel section to facilitate tool hoisting and maintenance during ladle hot repair; the dust hood located near the blower side is closed on the side near the blower and has an observation and operation hole 10.

[0048] When the dust removal hood 5 is folded, it is located on the side closest to the bag filter 7. A hub motor is installed in one of the hubs 5-2 closest to the ladle hot repair operation platform 1 to drive the hub 5-2 to rotate. The hub 5-2 is matched with the profile of the support base 2 and can travel along the length of the profile on the support base 2, thus realizing the folding and unfolding of the dust removal hood 5. When the dust removal hood 5 is unfolded, two dust suction hoods 5-1 are connected to its two ends, thereby enclosing the ladle 4 and preventing dust leakage during ladle hot repair.

[0049] Please see Figures 6-10 The specific steps for using the dust removal device for hot repair of the above-mentioned steel ladle are as follows:

[0050] 1. Before the hot repair of the ladle, the dust removal hood 5 is in a retracted state;

[0051] 2. During hot repair and dust removal of the ladle, the ladle 4 is hoisted to the ladle base 3 by an overhead crane, with the tail of the ladle facing the hot repair operation platform 1.

[0052] 3. The dust removal hood 5 starts to stretch and move on the support base through remote control. The hub motor is started. The two doors 5-3 of the dust removal hood 5 extend from the right dust hood to the left dust hood along the length of the steel profile of the support base. Then the hub motor is turned off. The unfolded doors 5-3 and the heat-resistant door sealing plate installed on them cover the ladle. The fan 6 is turned on. The operator operates the rotating boom 1-1 on the ladle hot repair operation platform 1 to hang hot repair tools to perform work such as replacing the sliding gate.

[0053] 4. After the hot repair work on the ladle is completed, the fan 6 is turned off, the hub motor is started to run in the opposite direction, and the door panels 5-3 on both sides of the dust removal hood 5 and the hub 5-2 are retracted and moved to their original positions;

[0054] 5. The overhead crane lifted out the steel ladle that had undergone hot repair, and the hot repair task was completed.

[0055] Furthermore, depending on the process requirements, the observation port 10 can be opened or closed. When in use, it can be opened to purge nitrogen through the observation port; when not in use, the observation port can be closed.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of this utility model without departing from the spirit and scope of this technical solution, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A dust removal device for hot repair of steel ladles, characterized in that: It includes a support base and, from left to right, a ladle hot repair operation platform, a dust removal hood cart, a fan, and a bag filter, all arranged on the support base. Both ends of the dust collection vehicle are equipped with dust collection hoods fixedly installed on the support base, and the inlet of the bag filter is connected to the dust collection hood through an air inlet pipe, and the outlet of the bag filter is connected to the fan through an air outlet pipe. A ladle base for placing a ladle is provided between the dust collection hoods located at both ends of the dust collection hood vehicle. The dust collection hood vehicle includes a movable hood arranged along the length of the support base. One end of the movable hood is fixedly connected to the dust collection hood near the fan, and the other end extends and retracts along the length of the support base. The maximum extension and retraction range can reach the dust collection hood near the ladle hot repair operation platform to cover the ladle.

2. The dust removal device for hot repair of steel ladles according to claim 1, characterized in that: At least two dust removal hoods are provided on the support base, evenly distributed along the width of the support base, to allow for simultaneous hot repair of multiple ladles.

3. The dust removal device for hot repair of steel ladles according to claim 1, characterized in that: The dust collection hood, located on the side closest to the fan, is closed off near the fan and has an observation and operation hole. The dust hood located near the ladle hot repair operation platform has two open sides along the length of the support base to facilitate the operation of the ladle hot repair operation platform.

4. The dust removal device for hot repair of steel ladles according to claim 1, characterized in that: The movable cover is a portal telescopic scissor frame structure, which is formed by connecting several portal frames and scissor frame structures. A heat-resistant door sealing plate is installed on the inner side of the portal telescopic scissor frame structure, and it unfolds or folds with the portal telescopic scissor frame structure.

5. The dust removal device for hot repair of steel ladles according to claim 4, characterized in that: Several pairs of wheel hubs are installed at the bottom of the portal telescopic scissor frame structure, and the support base is provided with steel profiles that match the wheel hubs to serve as guide plates; The pair of wheel hubs closest to the ladle hot repair operation platform are hub motor drive wheels, which drive the portal telescopic scissor frame structure to unfold or fold.

6. The dust removal device for hot repair of steel ladles according to claim 1, characterized in that: The bag filter is a folded filter cartridge with a spark catcher at the inlet and a dust hopper at the bottom, with a screw conveyor at the bottom of the dust hopper.

7. The dust removal device for hot repair of steel ladles according to claim 1, characterized in that: The ladle hot repair operation platform is a steel frame structure with a ladder at the bottom, steel plates and guardrails on the top, and a rotating boom installed.

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