Dust removal device used on top of rolling mill

Abstract

The utility model relates to a dust removal device used on the top of a rolling mill. The dust removal device comprises a dust collection device arranged in a rack and a dust removal device body arranged on the top of the rack. The dust collecting device is composed of an inlet and outlet guide plate, a dust catching and absorbing cover, an air pipe and an air feeder, the dust catching and absorbing cover is connected with a channel connector at the top of the machine frame through the air pipe, inlet smoke dust is pumped out, meanwhile, a negative pressure area is formed below the inlet guide plate, and pumped-out dust-containing airflow is fed into the wet dust collector. The dust removal device is composed of a dust removal box, a wet dust remover, a fan, a spraying system and a drainage pipe, a water pool is arranged in the dust removal box, a circulating rotating device, a tensioning device and a dust washing device which are arranged in the water pool are connected through a circulating movable filter belt, and sucked dust enters the water pool along with circulating movement of the filter belt and is discharged. The V-shaped indentation blades and the stainless steel wire mesh beside the water pool can be used for filtering, dewatering and demisting deep treatment, dust collection, dust removal and demisting operation is achieved, and the problem of unorganized dissipation of water mist, dust and gas at the top of the rolling mill is solved.

Description

Technical Field

[0001] The utility model relates to a device for collecting and removing dust on the top of a rolling mill in a steel rolling section, in particular to a dust removing device on the top of a rolling mill. Background Art

[0002] During the rolling process of steel billets produced by metallurgical and smelting enterprises, a large amount of iron oxide scale and iron dust are generated before and after the rolling mill, and a large amount of water vapor is generated during water spray cooling. These dust and water vapor mixtures are scattered into the factory and spread to all parts of the factory, affecting the environment near the rolling mill and even inside the factory, and also have a certain impact on the safe and continuous operation of the rolling electrical transmission equipment. The dust removal device installed on the top of the rolling mill is used to capture these dust and water vapor mixtures. It is the main equipment for effectively controlling the air pollution caused by water vapor and smoke generated during the steel rolling process, especially for controlling the large amount of water vapor smoke emitted from the top of the rolling mill frame, helping the dust removal system to maximize its efficiency, and cleanly and thoroughly remove the water vapor smoke emitted upward from the rolling mill frame, strictly controlling the unorganized emissions above the frame, among which the dust removal device on the top of the rolling mill is the most important technical means to prevent water vapor and smoke from escaping.

[0003] When the rollers are rolling the steel plates, the steel plates need to be rolled back and forth repeatedly in the middle of the rollers (commonly known as: four-roller reversible rolling). A large amount of cooling water needs to be sprayed during the rolling process. The red steel plates are stimulated by the cooling water, and water mist and dust will instantly rise into the sky. The rising water mist and dust will immediately turn into a mushroom cloud and spread outward, greatly affecting the air quality of the entire steel rolling workshop. The occurrence of this phenomenon is closely related to the uniqueness of the steel rolling process and the rolling rack. On the one hand, a large amount of cooling water needs to be sprayed during the rolling process, resulting in a large amount of water mist and dust. On the other hand, during the rolling process, the steel plates are rolled back and forth in a rack, making it impossible to install a dust removal device on the rack to capture water mist and dust. In particular, the medium and thick plate rolling line cannot be installed with a dust removal device because the horizontal width exceeds eight meters. Once the rollers and steel plates do not cooperate well, a jam will occur between the four rollers, and it will be impossible to clear the obstacles in time. In order to eliminate the fault as quickly as possible, it is necessary for an aerial crane to arrive in time for lifting. Due to the requirements of this operation, a dust removal device cannot be installed on the top of the rolling mill, so most of them are open, causing water mist and dust to fill the sky on the top of the rolling mill. This is an urgent problem to be solved in the field of dust removal of steel rolling mills today.

[0004] This harsh environment not only poses a huge hidden danger to production safety, but also seriously affects the ecological environment and air quality of the production workshop, and greatly endangers the physical and mental health of employees.

[0005] At present, there is no dust removal device on the top of the medium and thick plate rolling line frame because the lateral width exceeds eight meters and it is impossible to install a dust removal device. In addition, the front and back of the frame are densely packed with motors driving the rollers and there is no space to stand, so it is impossible to install a suitable dust removal device. This leaves a window for the unorganized dissipation of a large amount of water mist and dust generated during the medium and thick plate rolling process, thus affecting the air quality and ecological environment.

[0006] In view of this, researchers in the field of dust removal are committed to developing a dust removal device for the top of a rolling mill to improve the phenomenon of unorganized dispersion of water mist and dust on the top of the rolling mill frame, especially the medium and thick plate rolling mill frame. Summary of the invention

[0007] The task of the utility model is to provide a dust removal device for the top of a rolling mill, which can be installed on the top of the rolling mill frame, especially the medium and thick plate rolling mill frame. The dust removal device is divided into two parts, the first part is a dust collecting device, which is installed inside the front and rear of the frame, and the second part is a dust removal device, which is installed on the top of the frame. The dust removal device sends the dust-containing gas from each dust source point captured by the dust hood into the dust collector through the blower and the pipeline, and separates the dust and gas through continuous wet dust removal equipment. The purified gas is discharged into the top of the indoor frame through the blower, and the wastewater generated after separation and filtration is discharged into the slag flushing ditch at the bottom of the frame through the drain pipe, thereby solving the problems existing in the above-mentioned prior art.

[0008] The technical solution of the present invention is as follows:

[0009] A dust removal device for use on the top of a rolling mill, comprising two parts, the first part being a dust collecting device installed inside the front and rear of a frame; the second part being a dust removal device installed on the top of the frame;

[0010] The dust collecting device is composed of an inlet and outlet guide plate, a dust collecting and absorbing hood, a movable sleeve or hose and a blower; the dust collecting device is arranged at four main dust collecting points in the front, back, left and right of the frame, wherein the guide plate is provided with a plurality of air suction channels along the length direction, the dust collecting and absorbing hood is installed on the guide plate, the two ends of the dust collecting and absorbing hood are sealed, a frame top channel interface is arranged above the dust collecting and absorbing hood, the dust collecting and absorbing hood is connected to the frame top channel interface through a movable sleeve or hose, the imported smoke and dust are extracted in a high-speed and orderly manner, and a negative pressure zone is formed under the inlet guide plate at the same time, so that the dust no longer overflows everywhere, and the extracted dust-containing airflow is sent to the wet dust collector through a pipeline;

[0011] The dust removal device is composed of a dust removal box, a wet dust collector, a fan, a spray system, and a drain pipe; the wet dust collector includes a circulating mobile filter belt, a water pool, a circulating rotating device, a tensioning device, a dust washing device, a V-shaped indentation blade, and a stainless steel wire mesh arranged in the dust removal box;

[0012] A water pool is arranged in the dust removal box, and a circulating rotating device, a tensioning device and a dust washing device are arranged in the water pool. The circulating rotating device is composed of a motor, a reducer, a bearing and a driving roller. The driving roller is located on both sides of the water pool, and the tensioning device is installed on the upper part of the water pool. The dust washing device is arranged between two driving rollers located at the bottom of the water pool. The circulating rotating device, the tensioning device and the dust washing device are connected in a ring shape through a circulating mobile filter belt. The dust washing device is unpoweredly pulled by a brush roller provided on the upper and lower sides. The circulating mobile filter belt is used to collect the sucked dust. The dust enters the water pool with the circulating movement of the filter belt. When the dust in the water reaches a predetermined concentration, the system will open the valve to discharge the water and dust in the box into the slag flushing ditch under the unit to complete the drainage and ash unloading operations.

[0013] Vertically arranged V-shaped indentation blades and stainless steel wire mesh are arranged beside the water pool in the dust removal box. After one dust removal is completed, the dust gas enters the V-shaped indentation blades to remove water gas dust. The water gas dust is regularly sprayed with water when passing through the V-shaped indentation blades, and then further separated, filtered, dehydrated and demisted through the stainless steel wire mesh. The generated waste water is discharged into the slag flushing ditch at the bottom of the frame through a drain pipe, and the gas is discharged outside the frame with the fan, thereby realizing dust collection and dust removal and demisting operations.

[0014] Four lifting ears are arranged on the upper part of the dust removal box body of the dust removal device for easy lifting.

[0015] The utility model discloses a dust removal device for the top of a rolling mill, which can be used for a medium and thick plate rolling mill and is installed at the top of the frame of the medium and thick plate rolling mill. The dust removal device is divided into two parts. The first part is a dust collecting device, which is installed inside the front and rear of the frame and consists of an inlet and outlet guide plate, a dust hood, an air duct and a blower. The second part is a dust removal device, which is installed on the top of the frame and consists of a wet dust collector, a blower, a spray system, a drain pipe and the like.

[0016] The system flow of the dust removal device of the utility model is: the dust-containing gas from each dust source point is captured by the dust hood through the dust collection layout of the inlet guide plate, and is sent to the dust collector through the blower and the pipeline, and the dust and gas are separated by continuous wet dust removal equipment, and the purified gas is discharged to the top of the indoor rack through the blower. When removing dust, the dust-containing gas enters the wet dust collector, and the dust is removed by the V-shaped indentation blades used for dust removal. When the dust passes through the V-shaped indentation blade wire mesh, it is sprayed with water regularly, and then further separated and filtered through the stainless steel wire mesh, and the wastewater generated is discharged into the slag flushing ditch at the bottom of the rack through the drain pipe.

[0017] In order to meet the needs of mill inspection and maintenance, when a mill fails or a steel plate is stuck during rolling, the dust removal device on the top can be removed. Before the dust removal device is moved, only the hose connection part needs to be removed to free up space for inspection and maintenance, which is convenient for the vehicle to arrive in time for obstacle removal and resume normal steel rolling operations in time. The implementation of this technical means has achieved the effect of controlling the unorganized dissipation of water mist and dust on the top of the frame, and is also conducive to the purpose of rapid obstacle removal when a mill fails. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The utility model is a schematic diagram of the overall structure of a dust removal device used on the top of a rolling mill.

[0019] Figure 2 yes Figure 1 Schematic diagram of the structure of the dust collecting device used in the dust removal device on the top of the rolling mill.

[0020] Figure 3 yes Figure 1 Schematic diagram of the structure of the dust removal device used in the dust removal device on the top of the rolling mill.

[0021] Reference numerals:

[0022] 1 is a dust collecting device, 1-1 is a guide plate, 1-2 is a dust collecting and absorbing cover, and 1-3 is a movable sleeve or hose;

[0023] 2 is a dust removal device, 2-1 is a dust removal box, 2-2 is a circulating mobile filter belt, 2-3 is a water pool, 2-4 is a circulating rotating device, 2-5 is a tensioning device, 2-6 is a dust washing device, 2-7 is a V-shaped indentation blade, and 2-8 is a stainless steel wire mesh. DETAILED DESCRIPTION

[0024] The utility model is described in detail below with reference to the accompanying drawings and embodiments.

[0025] See also Figures 1 to 3 The utility model provides a dust removal device for the top of a rolling mill, which includes two parts. The first part is a dust collecting device 1 installed inside the front and rear of a frame; the second part is a dust removal device 2 installed on the top of the frame.

[0026] The dust collecting device 1 is composed of an inlet and outlet guide plate 1-1, a dust collecting and absorbing hood 1-2, an air duct made of a movable sleeve or hose 1-3, and a blower. The dust collecting device 1 is arranged at four main dust collecting points in the front, back, left and right of the frame. The guide plate 1-1 is provided with 13 air suction channels along the length direction, and the diameter of each channel is 200mm. The dust collecting and absorbing hood 1-2 is installed on the guide plate 1-1, and the principle is not to affect the free space limit of the guide plate when changing the roller. The height and size of the dust collecting and absorbing hood 1-2 meet the dust collecting needs, and the two ends of the dust collecting and absorbing hood 1-2 are sealed. Four channel interfaces are provided on the top of the frame above the dust collecting and absorbing hood 1-2, and the channel interfaces are provided for the connection of retractable hoses or the connection of movable sleeves, so as to facilitate flexible disassembly and assembly during inspection and maintenance. The dust collecting and absorbing hood 1-2 is connected to the channel interface on the top of the frame through a movable sleeve or hose 1-3, and the imported smoke and dust are extracted in a high-speed and orderly manner. At the same time, a negative pressure area is formed under the inlet guide plate, so that the dust no longer spreads everywhere, and the extracted dust-containing airflow is sent to the wet dust collector through a pipeline.

[0027] The dust removal device 2 is composed of a dust removal box 2-1, a wet dust collector, a fan, a spray system, a drain pipe, etc. The wet dust collector includes a circulating mobile filter belt 2-2, a water tank 2-3, a circulating rotating device 2-4, a tensioning device 2-5, and a dust washing device 2-6. The circulating mobile filter belt 2-2 is arranged in the dust removal box 2-1.

[0028] A water pool 2-3 is arranged in the dust removal box 2-1, and a circulating rotating device 2-4, a tensioning device 2-5 and a dust washing device 2-6 are arranged in the water pool 2-3. The circulating rotating device 2-4 is composed of a motor, a reducer, a bearing and a driving roller. The driving roller is located on both sides of the water pool 2-3, the tensioning device 2-5 is installed on the upper part of the water pool 2-3, and the dust washing device 2-6 is placed between the two driving rollers located at the bottom of the water pool 2-3. The circulating rotating device 2-4, the tensioning device 2-5 and the dust washing device 2-6 are connected in a ring shape through a circulating mobile filter belt 2-2, and the dust washing device 2-6 is unpoweredly pulled by a brush roller provided at the upper and lower ends. The circulating mobile filter belt 2-2 is used to collect the inhaled dust, and the dust enters the water pool with the circulating movement of the filter belt. When the dust in the water reaches a predetermined concentration, the system will open the valve to discharge the water and dust in the box into the slag flushing ditch below the unit to complete the drainage and ash unloading operations.

[0029] Vertically arranged V-shaped indentation blades 2-7 and stainless steel wire mesh 2-8 are arranged beside the water pool 2-3 in the dust removal box 2-1. After one dust removal is completed, the dust gas enters the V-shaped indentation blades 2-7 to remove water dust. The water dust is sprayed with water regularly when passing through the V-shaped indentation blades 2-7, and then passes through the stainless steel wire mesh 2-8 for further separation, filtration and dehydration and demisting deep treatment. The generated wastewater is discharged into the slag flushing ditch at the bottom of the frame through a drain pipe, and the gas is discharged outside the frame with the fan, thereby realizing dust collection and dust removal and demisting operations.

[0030] In order to meet the needs of inspection and maintenance of the rolling mill, all the pipes connected from the dust collecting pipe to the dust collector are connected by hose connection or large pipe sleeve small pipe sliding connection to meet the requirements of convenient disassembly and assembly. Four lifting ears are set on the upper part of the dust removal box 2-1 of the dust removal device 2 for easy lifting. A soft connection is used between the fan and the dust collector. When the rolling mill fails or the steel plate is stuck during the rolling process, the dust removal device on the top can be removed to free up space for inspection and maintenance, which is convenient for the driving to arrive in time for clearing the obstacle and resume normal steel rolling operations in time. The implementation of this technical means realizes the task of controlling the unorganized dissipation of water mist and dust gas on the top of the frame, and is also conducive to the purpose of rapid obstacle clearing when the rolling mill fails.

[0031] The dust removal device of the utility model adopts wet dust removal. For the upper stage operation, the dust gas is sucked into the dust removal box through negative pressure. A circulating mobile filter belt is set in front of the dust removal box. The filter belt is used to collect the sucked dust. The dust enters the water pool with the circulating movement of the filter belt. The water pool has a capacity of 1m³ and is drained once a day. The water level can be adjusted according to the actual situation. A circulating rotating device, a tensioning device and a dust washing device are set in the water pool. The circulating rotating device is composed of a motor, a reducer, a bearing and a driving roller. The tensioning device and the dust washing device ensure that the circulating moving filter belt can circulate normally, and wash the dust on the filter belt into the water during the circulating rotation. The dust washing device is installed at the bottom of the dust removal box, and is unpoweredly pulled by a brush roller at the top and bottom. The water level at the bottom of the dust removal box submerges 10mm above the brush roller, and runs in the same direction as the circulating mobile filter belt. When the dust in the water reaches a certain concentration, the system will open the valve to discharge the water and dust in the dust removal box into the slag ditch below the unit. After completing the drainage and ash (dust) unloading operations, the system will refill water, and the water level will be automatically replenished by the level gauge according to the needs of the system, with a water volume of about 1m³. After one dust removal is completed, the dust gas enters the V-shaped indentation blade to remove water and gas dust. When the water and gas dust pass through the V-shaped indentation blade wire mesh, they are regularly sprayed with water, and then further separated and filtered through the stainless steel wire mesh and dehydrated and misted by the dehydration demister for deep treatment. The wastewater generated is discharged into the slag ditch at the bottom of the frame through the drain pipe, and the gas is discharged outside the frame with the fan, thereby realizing dust collection and dust removal and mist removal operations.

[0032] In actual application, by disassembling and moving the dust removal device used on the top of the rolling mill of the utility model, the convenience of daily inspection and maintenance of the rolling mill can be met, and it has the operability of maintaining one set and dismantling another set. It can also suppress and solve the problem of unorganized dispersion of water mist and dust on the top of the frame, and has practical application value.

[0033] Of course, those skilled in the art should realize that the above embodiments are only used to illustrate the present invention, and are not intended to limit the present invention. As long as they are within the spirit of the present invention, any changes or modifications to the above embodiments will fall within the scope of the claims of the present invention.

Claims

1. A dust removal device for use on top of a rolling mill, characterized in that: It comprises two parts, the first part is a dust collecting device (1), which is installed inside the front and rear of the frame; the second part is a dust removing device (2), which is installed on the top of the frame; The dust collecting device (1) is composed of an inlet and outlet guide plate (1-1), a dust collecting and absorbing hood (1-2), a movable sleeve or hose (1-3) and a blower; the dust collecting device (1) is arranged at four main dust collecting points in the front, rear, left and right of the frame, wherein the guide plate (1-1) is provided with a plurality of air suction channels along the length direction, the dust collecting and absorbing hood (1-2) is installed on the guide plate (1-1), both ends of the dust collecting and absorbing hood (1-2) are sealed, a frame top channel interface is arranged above the dust collecting and absorbing hood (1-2), the dust collecting and absorbing hood (1-2) is connected to the frame top channel interface via a movable sleeve or hose (1-3), the inlet smoke and dust are extracted at a high speed and in an orderly manner, and a negative pressure zone is formed below the inlet guide plate, so that the dust is no longer scattered everywhere, and the extracted dust-containing airflow is sent to the wet dust collector through a pipeline; The dust removal device (2) is composed of a dust removal box (2-1), a wet dust collector, a fan, a spray system, and a drain pipe; the wet dust collector comprises a circulating mobile filter belt (2-2) arranged in the dust removal box (2-1), a water pool (2-3), a circulating rotating device (2-4), a tensioning device (2-5), a dust washing device (2-6), a V-shaped indentation blade (2-7), and a stainless steel wire mesh (2-8); A water pool (2-3) is arranged in the dust removal box (2-1), and a circulating rotating device (2-4), a tensioning device (2-5) and a dust washing device (2-6) are arranged in the water pool (2-3). The circulating rotating device (2-4) is composed of a motor, a reducer, a bearing and a driving roller. The driving roller is located on both sides of the water pool (2-3). The tensioning device (2-5) is installed on the upper part of the water pool (2-3). The dust washing device (2-6) is arranged between two driving rollers located at the bottom of the water pool (2-3). The filter (2-4), the tensioning device (2-5) and the dust washing device (2-6) are connected in a ring shape through a circulating mobile filter belt (2-2). The dust washing device (2-6) is unpoweredly pulled by a brush roller provided at the top and bottom. The circulating mobile filter belt (2-2) is used to collect the sucked dust. The dust enters the water pool along with the circulating movement of the filter belt. When the dust in the water reaches a predetermined concentration, the system will open the valve to discharge the water and dust in the box into the slag flushing ditch below the unit, thereby completing the drainage and dust unloading operations. A vertically arranged V-shaped indentation blade (2-7) and a stainless steel wire mesh (2-8) are arranged beside the water pool (2-3) in the dust removal box (2-1). After dust removal is completed once, the dust gas enters the V-shaped indentation blade (2-7) to remove water dust. The water dust is sprayed with water regularly when passing through the V-shaped indentation blade (2-7), and then passes through the stainless steel wire mesh (2-8) for further separation, filtration, dehydration and demisting deep treatment. The generated wastewater is discharged into the slag flushing groove at the bottom of the frame through a drainage pipe, and the gas is discharged outside the frame along with the fan, thereby realizing dust collection and dust removal and demisting operations.

2. The dust removal device for the top of a rolling mill according to claim 1, characterized in that: The dust removal box (2-1) of the dust removal device (2) is provided with four lifting ears on the upper part of the box body for easy lifting.

Images