CN112023573B - Dust suppression method after iron ladle iron adding and iron ladle iron adding dust suppression device - Google Patents
Dust suppression method after iron ladle iron adding and iron ladle iron adding dust suppression device Download PDFInfo
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- CN112023573B CN112023573B CN202010964058.3A CN202010964058A CN112023573B CN 112023573 B CN112023573 B CN 112023573B CN 202010964058 A CN202010964058 A CN 202010964058A CN 112023573 B CN112023573 B CN 112023573B
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Abstract
The application relates to the technical field of steel production, in particular to a dust suppression method and a dust suppression device for iron ladle iron charging, wherein the dust suppression method comprises the following steps: arranging a plurality of atomizing nozzles along a return path after charging iron on the iron ladle, enabling the plurality of atomizing nozzles to be positioned above the iron ladle, respectively connecting each atomizing nozzle with a water supply pipeline and a gas supply pipeline, and arranging an on-off switch on each atomizing nozzle; and the on-off switches of the plurality of atomizing nozzles are all connected with a spraying controller, the spraying controller controls the on-off switches of the plurality of atomizing nozzles to be sequentially opened according to the set interval time according to the return speed and the initial return time of the iron ladle, and each atomizing nozzle is closed after the set duration time. The method for suppressing the dust after the iron ladle is added with iron is a dynamic dust suppression method, can set longer dust suppression time, is high in iron ladle turnover speed, and gives consideration to higher dust suppression safety, better dust suppression effect and higher production efficiency.
Description
Technical Field
The application relates to the technical field of steel production, in particular to a dust suppression method and a dust suppression device for iron ladle iron charging.
Background
In the production of ferrous metallurgy, after the iron is added into the iron ladle in the converter, a large amount of dust can overflow from the mouth of the iron ladle, and in order to solve the problem of dust diffusion, at present, a nozzle is generally arranged in front of a fire door of the converter, the iron ladle is temporarily kept after the iron is added, and after the nozzle sprays and reduces dust, an overhead travelling crane transports the iron ladle away. The current treatment mode needs to be careful when the nozzle and the water pipe thereof are in fault and water leakage, and the converter water inlet is easy to cause safety accidents due to large water leakage. However, because the temperature in front of the fire door is high, the fire door needs to be overhauled in a production gap, and therefore, the fire door has a great potential safety hazard.
Disclosure of Invention
The application aims to provide a dust suppression method and a dust suppression device for iron ladle after iron charging, so as to solve the problem of dust suppression after iron charging of the iron ladle in the prior art.
The embodiment of the application is realized as follows:
in a first aspect, the embodiment of the present application provides a method for suppressing dust after iron ladle is added with iron, including:
arranging a plurality of atomizing nozzles along a return path after charging iron on the iron ladle, enabling the plurality of atomizing nozzles to be positioned above the iron ladle, respectively connecting each atomizing nozzle with a water supply pipeline and a gas supply pipeline, and arranging an on-off switch on each atomizing nozzle;
and the on-off switches of the plurality of atomizing nozzles are all connected with a spraying controller, the spraying controller controls the on-off switches of the plurality of atomizing nozzles to be sequentially opened according to the set interval time according to the return speed and the initial return time of the iron ladle, and each atomizing nozzle is closed after the set duration time.
The method for suppressing the dust after the iron ladle is added with the iron is a dynamic dust suppression method, a crown block drives a return stroke immediately after the iron ladle is added with the iron, a first atomizing nozzle in a plurality of atomizing nozzles is immediately opened, the remaining atomizing nozzles arranged along the return stroke path after the iron ladle is added with the iron are sequentially opened according to a set interval time and closed after the iron ladle passes through a dust suppression range of the iron ladle, so that the iron ladle is always covered by water mist in the return stroke process, and the dust suppression effect is realized.
The iron ladle does not need to be temporarily kept in front of the fire door in the whole dust suppression process, and the turnover speed of the iron ladle is high; the iron ladle is not influenced by the heat of the converter, and the cooling and dust falling speed is high; even if the atomizing nozzle and a water supply pipeline thereof break down, the converter cannot be fed with water, so that the safety risk is greatly reduced; the temperature of the position of the atomizing nozzle is lower than that of the atomizing nozzle before the converter, so that a human body can bear the atomizing nozzle, and an operator can overhaul the atomizing nozzle at any time to ensure the normal work of the atomizing nozzle; the atomizing nozzle is closed after the iron ladle passes through, so that the water consumption can be saved, and the method is energy-saving and environment-friendly.
In an embodiment of the present application, optionally, the set interval time is less than the set duration time.
After an iron ladle passes through an atomizing nozzle, a little residual dust possibly exists in the dust suppression range of the atomizing nozzle, and in the technical scheme, the atomizing nozzle can be closed after continuously spraying for a while so as to reduce the residual dust after the iron ladle passes through and improve the dust suppression effect.
In one embodiment of the present application, each atomizing nozzle is optionally 3m to 5m away from the post-iron charging return path, and the spray angle formed by each atomizing nozzle is adjusted to 40 ° to 50 °.
In the technical scheme, the atomizing nozzle is arranged to form fan-shaped spraying with a jet flow angle of 40-50 degrees, the atomizing nozzle is arranged at a position 3-5 m away from the iron ladle, the fan-shaped spraying can form a fan-shaped dust suppression range with impact force around, the impact force can enable metal oxides and smoke dust to be pressed down easily within the distance range of 5m, and a good dust suppression effect is achieved, so that each fan-shaped spraying can give consideration to a large dust suppression range and a large jet impact force, the atomizing nozzle can be away from the high-temperature iron ladle at a certain safety distance, and personnel can maintain a water supply pipeline and the atomizing nozzle in the dust suppression process.
In one embodiment of the present application, optionally, one atomizing nozzle is provided every 2.3m to 2.7 m.
The diameter of the iron ladle is about 2.9m generally, in the technical scheme, the distance between the atomizing nozzles is 2.3 m-2.7 m, the spraying widths of adjacent fan-shaped spraying nozzles are overlapped 1/4-1/3 at the position 3 m-5 m away from the atomizing nozzles, when the iron ladle enters the fan-shaped spraying of the next atomizing nozzle, the iron ladle does not leave the fan-shaped spraying of the last atomizing nozzle, the iron ladle is further ensured to be continuously positioned in the water mist cage, and a good dust suppression effect is achieved.
In an embodiment of the present application, optionally, the set interval time is 3s to 6s, and the set duration time is 10 s.
According to the speed that the overhead traveling crane drove the iron ladle return stroke and atomizing nozzle's fan-shaped spraying coverage, set up next atomizing nozzle and open at present atomizing nozzle back interval 3s ~ 6s and open to continuously spray 10s, further ensure that the iron ladle lasts and be in the water smoke cage cover, preceding atomizing nozzle can form fan-shaped spraying in advance, and the remaining dust of iron ladle process back can be handled to back atomizing nozzle, not only suppresses the dust and produces, can also restrain the dust diffusion, presses down dirt effectually.
In an embodiment of the application, optionally, a temperature sensor is arranged at a starting position of a return path after the iron ladle is charged with iron, a temperature signal is sent out when a detection result of the temperature sensor reaches a set temperature, and the spray controller controls the on-off switches of the plurality of atomizing nozzles to be sequentially turned on according to the temperature signal and a set interval time.
In the technical scheme, when the iron ladle starts to return, the temperature sensor senses high temperature and sends a temperature signal, so that the spray controller controls the plurality of atomizing nozzles to be sequentially opened, and dynamic dust suppression is realized.
In one embodiment of the present application, the spray of the atomizing nozzle optionally has a spray particle diameter of 25 μm to 40 μm.
In the technical scheme, the particle size of the fog particles with the particle size of 25-40 mu m is close to that of the metal oxide dust in a steel production workshop, the fog particles and the metal oxide dust are easy to contact and coalesce, and the dust suppression effect by spraying is improved.
In an embodiment of the present application, the spray direction of each atomizing nozzle is optionally directed toward the incoming direction of the iron ladle.
In the technical scheme, the jet flow direction of the atomizing nozzle faces the opening of the iron ladle, and the impact force applied to the opening of the iron ladle is larger, so that the dust suppression effect is better.
In an embodiment of the present application, optionally, the spray controller is provided with a remote controller, and the remote controller is operated to control the on/off switches of the plurality of atomizing nozzles to be turned on and off.
In the technical scheme, the atomizing nozzle is further ensured to normally work to form a dust suppression range by arranging the remote controller, and dynamic dust suppression is ensured.
In a second aspect, embodiments of the present application provide an apparatus for suppressing dust in a hot metal ladle, including:
the water supply pipeline extends in parallel to a return path after the iron ladle is charged with iron, and a self-cleaning filtering device is arranged on the water supply pipeline;
the air supply pipeline is provided with a pressure stabilizing tank;
the atomizing nozzles are sequentially arranged along the water supply pipeline, are connected to the water supply pipeline in an adjustable direction and are respectively connected with the air supply pipeline, and each atomizing nozzle is provided with an on-off switch;
the temperature sensor is arranged at the initial position of a return path after the iron ladle is charged with iron;
and the spray controller controls the on-off switches of the plurality of atomizing nozzles to be sequentially opened and closed along a return path after the iron ladle is charged with iron according to the detection result of the temperature sensor.
The application provides a indisputable package is converted iron and is pressed down dirt device is through setting up a plurality of atomizing nozzle on indisputable package return stroke route, when the indisputable package begins the return stroke after converting iron, temperature sensor detects high temperature, and a plurality of atomizing nozzle on the spray controller control return stroke route are opened and are closed in proper order to make the indisputable package cover by water smoke all the time at the return stroke in-process, realize pressing down the effect of dirt. This iron ladle is converted iron and is pressed down dirt device's atomizing nozzle position can make things convenient for the operation personnel to overhaul at any time, guarantees atomizing nozzle normal work, also can not lead to the converter to intake, and greatly reduced presses down dirt safety risk, and a plurality of atomizing nozzles are closed after the iron ladle process respectively, save the water consumption greatly. And through setting up this iron ladle and adding iron dust suppression device, the iron ladle returns promptly and keeps away from high temperature converter after adding iron, plays the effect of quickening cooling speed, quickening dust fall speed, quickening iron ladle turnover speed.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present application and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.
FIG. 1 is a schematic view of a connection structure of a dust suppressing apparatus for iron ladle charging according to an embodiment of the present application;
FIG. 2 is a schematic plan view of a dust suppression apparatus for iron ladle charging according to an embodiment of the present application;
FIG. 3 is a schematic diagram of an elevational view of a hot metal charging and dust suppressing apparatus according to an embodiment of the present application;
fig. 4 is a schematic structural view of an atomizing nozzle provided in an embodiment of the present application.
Icon: 100-converter; 200-overhead traveling crane; 300-iron ladle; 400-boarding platform; 500-water supply line; 510-a waterway switch; 520-self cleaning filter apparatus; 600-an atomizing nozzle; 610-loose joint hose; 700-a spray controller; 710-a remote control; 800-temperature sensor; 900-air supply line; 910-gas path switch; 920-a pressure stabilizing tank; a-jet angle; b-inclination angle;
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. The components of the embodiments of the present application, generally described and illustrated in the figures herein, can be arranged and designed in a wide variety of different configurations.
Thus, the following detailed description of the embodiments of the present application, presented in the accompanying drawings, is not intended to limit the scope of the claimed application, but is merely representative of selected embodiments of the application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.
In the description of the present application, it should be noted that if the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are used for indicating the orientation or positional relationship based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship which is usually placed when the product of the application is used, the description is only for convenience and simplicity, and the indication or suggestion that the referred device or element must have a specific orientation, be constructed in a specific orientation and be operated, and thus, should not be construed as limiting the present application. Furthermore, the appearances of the terms "first," "second," and the like in the description herein are only used for distinguishing between similar elements and are not intended to be construed as indicating or implying relative importance.
Furthermore, the terms "horizontal", "vertical" and the like when used in the description of the present application do not require that the components be absolutely horizontal or overhanging, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present application, it should also be noted that, unless otherwise explicitly stated or limited, the terms "disposed," "mounted," "connected," and "connected" should be interpreted broadly, e.g., as being fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
Examples
The embodiment of the application provides a device and a method for suppressing dust after iron charging of an iron ladle, and aims to solve the problem of dust suppression after iron charging of the iron ladle in the prior art.
This embodiment adopts and presses down dirt at indisputable package return stroke in-process developments, can set up longer dust suppression time compared with prior art, can not lead to the security risk that the converter intake to appear, and the turnover of indisputable package is fast moreover, compromises better dust suppression effect and higher production efficiency.
As shown in fig. 1, the apparatus for charging iron and suppressing dust of a ladle includes a water supply line 500, an air supply line 900, a plurality of atomizing nozzles 600, a temperature sensor 800, a spray controller 700, and a boarding platform 400.
The people-surmounting platform 400 is located higher than the converter 100 and the ladle 300, is arranged beside the converter 100 and is located at one side of a return route of the ladle 300 after charging.
Referring to fig. 2 and 3, the water supply line 500 is installed on the upper platform 400 and extends parallel to the return path after charging the ladle 300.
The plurality of atomizing nozzles 600 are arranged along the water supply line 500 and connected to the air supply line 900, and each atomizing nozzle 600 is provided with an on-off switch.
Considering the influence of the ladle 300 on the atomizing nozzle 600 during the return stroke, the atomizing nozzle 600 is disposed at a distance of about 3 to 5m from the ladle 300 so as to prevent the atomizing nozzle 600 from being damaged by an excessively high temperature for a long period of time.
The boarding platform 400 is provided with a temperature sensor 800 at a position close to the converter 100, and the temperature sensor 800 is approximately at the initial position of the return route of the ladle 300. A set temperature is set to the temperature sensor 800 according to the amount of heat transferred from the ladle 300 at the start position to the position where the temperature sensor 800 is located. The temperature detected by the temperature sensor 800 is generally lower than the set temperature, and when the ladle 300 is at the initial position, the detection result of the temperature sensor 800 is even higher than the set temperature.
When the detection result of the temperature sensor 800 reaches the set temperature, the temperature sensor 800 sends a temperature signal.
The spray controller receives the temperature signal and controls the on-off switches of the atomizing nozzles 600 to be sequentially switched on and off, so that a dynamic dust suppression range is formed from the initial position of the return path, the iron ladle 300 is always covered in the water mist in the process of moving along the return path and is in the dust suppression range, the dust suppression effect is achieved, and the water consumption is greatly saved.
Because the steel production workshop is in a high-temperature and dusty environment, and the used water is generally industrial water, the water quality is poor, and the atomizing nozzle 600 is easy to block. Atomizing nozzle 600 adopts self-cleaning nozzle, and self-cleaning nozzle is the equipment of purchasing, and when there was the foreign matter jam in the spout, atomizing nozzle 600 internal pressure can increase for the bore is enlargied, and internal pressure drops behind the automatic blowout foreign matter, and atomizing nozzle 600 bore automatic recovery.
Through field tests, when the same spray angle is given, the fan-shaped spray has the largest spray impact force, the hollow cone-shaped spray is the second order, and the solid cone-shaped spray has the smallest impact force, so that the fan-shaped self-cleaning nozzle is selected when the atomizing nozzle 600 is selected.
Considering that the distance between the atomizing nozzle 600 and the ladle 300 is about 3m to 5m, the spray angle a formed by the atomizing nozzle 600 is set to 40 degrees to 50 degrees. The fan-shaped spray can form a fan-shaped large dust suppression range around, generally within a distance range of 5m, the impact force of the spray can enable metal oxides and smoke dust to be easily pressed down, and a good dust suppression effect is achieved, so that the large dust suppression range and the large jet impact force can be considered at the same time.
Considering the overlapping of the spray widths of the adjacent atomizing nozzles 600 and the diameter of the ladle 300 is generally about 2.9m, the distance between the adjacent atomizing nozzles 600 is 2.3m to 2.7m according to the spray angle a of the atomizing nozzle 600. Through the arrangement, the spray widths of the adjacent fan-shaped sprays are overlapped by about 1/4-1/3 at a position about 3-5 m away from the atomizing nozzle 600, when the iron ladle 300 enters the fan-shaped spray of the next atomizing nozzle 600, the iron ladle 300 does not leave the fan-shaped spray of the previous atomizing nozzle 600, the iron ladle 300 is further ensured to be continuously positioned in the water mist cage, and a good dust suppression effect is achieved.
In order to ensure the atomizing effect and impact force of the atomizing nozzle 600, the air supply line 900 is provided with a pressure stabilizing tank 920.
Further, a self-cleaning filter device 520 is provided in the water supply line 500, and water is filtered by the self-cleaning filter device 520 and then enters the atomizing nozzle 600 to prevent clogging. The self-cleaning filter apparatus 520 is a commercially available device.
In order to better control the air path and the water path of the atomizing nozzle 600, the on-off switch includes a water path switch 510 and an air path switch 910, the water path switch 510 is disposed on the water supply line 500, and the air path switch 910 is disposed on the air supply line 900. The waterway switch 510 and the waterway switch 910 are respectively solenoid valves, and the spray controller 700 controls the on-off of the corresponding path by controlling the opening and closing of the solenoid valves, and controls the water supply size and the air supply size by controlling the opening degree of the solenoid valves. When the amount of water supplied to the atomizing nozzle 600 is constant, the larger the amount of supplied air is, the more sufficient the atomization is, and the larger the impact force is.
In this embodiment, the flow rates of the air supply line 900 and the water supply line 500 are controlled so that the diameter of the mist particles sprayed from the atomizing nozzle 600 is 25 μm to 40 μm. The particle size of the fog particles of 25-40 μm is close to that of the metal oxide dust in a steel production workshop, the fog particles and the metal oxide dust are easy to contact and coalesce, and the dust suppression effect by spraying is improved.
To facilitate adjustment of the atomizing nozzle 600 to accommodate different spray requirements, the atomizing nozzle 600 is connected to the water supply line 500 by a union hose 610, as shown in fig. 1 and 4, so that the atomizing nozzle 600 can spray in a desired direction by rotation.
When the iron ladle 300 returns, the atomizing nozzle 600 can be rotated to the incoming direction facing the iron ladle 300, so as to face the opening of the iron ladle 300, and the dust suppression effect is improved.
Further, the jet flow is inclined downward to further face the opening of the ladle 300, so that the impact force applied to the jet flow is larger, and the inclination angle b is 5-15 degrees.
The method for suppressing dust after iron ladle iron adding by using the iron ladle iron adding dust suppression device comprises the following steps:
1) the interval distance of the atomizing nozzles 600 is set to be 2.3 m-2.7 m in advance, the distance between the atomizing nozzles 600 and the return path is set to be 3 m-5 m, the jet flow angle a of the atomizing nozzles 600 is 40-50 degrees, the jet flow direction of the atomizing nozzles 600 faces the incoming direction of the ladle 300, and the atomizing nozzles 600 spray downwards at the inclination angle b of 5-15 degrees.
In this embodiment, the interval between the atomizing nozzles 600 is 2.7m, the distance between the atomizing nozzle 600 and the return path is 5m, the jet flow angle a of the atomizing nozzle 600 is 45 °, the jet flow direction of the atomizing nozzle 600 faces the incoming direction of the ladle 300, and the atomizing nozzle 600 sprays downward at an inclination angle b of 15 °.
2) Then, according to the speed of the existing crown block 200 driving the ladle 300 to return at about 1m/s, the time interval between the arrival of the ladle 300 at the fan-shaped spray of the next atomizing nozzle 600 and the time interval between the arrival of the ladle 300 at the fan-shaped spray of the previous atomizing nozzle 600 can be known. The next atomizing nozzle 600 is commanded to be opened every set interval time of 3-6 s set by the spray controller 700, and is commanded to be closed after a set duration of 10s, so as to ensure that the opening of the ladle 300 is at least in the fan-shaped spray coverage of one atomizing nozzle 600.
In this embodiment, three atomizing nozzles 600 are provided according to the experiment, and the ladle 300 does not generate dust any more after passing through the three atomizing nozzles 600.
Since a fan-shaped spray of 5m is emitted at 45 ° and covers a return path for a length of about 10m, the traveling time of the crown block 200 is about 10s in the range covered by the fan-shaped spray of each atomizing nozzle 600, and in this embodiment, the set interval time is 4s and the set duration time is 10 s.
Taking the three atomizing nozzles 600 of the present embodiment as an example, for convenience of description, the atomizing nozzle 600 close to the converter 100 is referred to as a first nozzle, and the adjacent atomizing nozzle 600 is referred to as a second nozzle, and finally, a third nozzle.
3) Putting into use after the steps 1) and 2) are finished. Before the iron ladle 300 is loaded with molten iron and positioned in front of the converter 100, the action pair hook drives the iron ladle 300 to rotate until the opening faces downwards so as to add iron to the converter 100, after the iron adding is finished, the iron ladle 300 rotates back to the opening to be inclined upwards, as shown in fig. 3, an included angle of 40-60 degrees is formed between the whole iron ladle 300 and the ground, and the crown block 200 drives the iron ladle 300 to return.
4) When the ladle 300 reaches the return stroke starting position, the detection result of the temperature sensor 800 reaches the set temperature, and the temperature sensor 800 sends a temperature signal to the spray controller 700.
5) The spray controller 700 receives the temperature signal and sends an opening command to the on-off switch (i.e. the air path switch 910 and the water path switch 510) of the first nozzle, the air path switch 910 and the water path switch 510 of the first nozzle are opened according to the command of the spray controller 700, and the first nozzle sprays water mist.
6) After the first nozzle is opened for about 4 seconds, the first set interval time is reached, the spray controller 700 sends an opening command to the opening and closing switches (namely, the air path switch 910 and the water path switch 510) of the second nozzle, the air path switch 910 and the water path switch 510 of the second nozzle are respectively opened according to the command of the spray controller 700, and the second nozzle sprays water mist.
The fan spray of the first nozzle covers the entire ladle 300 opening, and the second nozzle creates a dust suppression zone saturated with water mist in advance in the front.
7) After 4s, when the second set interval time is reached, the spray controller 700 sends an opening command to the on-off switch (i.e., the air path switch 910 and the water path switch 510) of the third nozzle, the air path switch 910 and the water path switch 510 of the third nozzle are opened according to the command of the spray controller 700, and the third nozzle sprays water mist.
The fan-shaped spray of the first nozzle and the fan-shaped spray of the second nozzle cover the whole opening of the iron ladle 300 together, the fan-shaped spray of the first nozzle reduces the dust remained after the iron ladle 300 passes behind, and the third nozzle forms a dust suppression range saturated with water mist in advance in the front.
8) After 2 seconds, the first set duration is reached, the spray controller 700 sends a closing command to the on-off switch (i.e. the air path switch 910 and the water path switch 510) of the first nozzle, the air path switch 910 and the water path switch 510 of the first nozzle are closed according to the command of the spray controller 700, and the first nozzle stops spraying water mist.
At this time, the fan-shaped spray of the third nozzle covers the whole opening of the ladle 300, and the fan-shaped spray of the second nozzle reduces the dust remained after the ladle 300 passes behind.
9) After 4 seconds, the second set duration is reached, the spray controller 700 sends a closing command to the on-off switch (i.e., the air path switch 910 and the water path switch 510) of the second nozzle, the air path switch 910 and the water path switch 510 of the second nozzle are closed according to the command of the spray controller 700, and the second nozzle stops spraying the water mist.
At this time, the fan-shaped spray of the third nozzle covers the entire opening of the ladle 300 and reduces dust remaining after the ladle 300 passes behind.
10) After 4 seconds, the third set duration is reached, the spray controller 700 sends a closing command to the on-off switch (i.e., the air path switch 910 and the water path switch 510) of the third nozzle, the air path switch 910 and the water path switch 510 of the third nozzle are closed according to the command of the spray controller 700, and the third nozzle stops spraying the water mist.
At this time, the dust suppression work is completed.
In order to avoid the situation that the second nozzle and the third nozzle are not opened when the iron ladle 300 arrives, the second nozzle and the third nozzle can be respectively additionally provided with a temperature sensor 800. When the iron ladle reaches the second nozzle or the third nozzle, if the second nozzle or the third nozzle is not opened, the temperature sensor 800 arranged on the iron ladle sends a temperature signal, and the spray controller 700 controls the corresponding atomizing nozzle 600 to be opened according to the temperature signal.
To further prevent the atomizing nozzles 600 from being improperly opened, a remote controller 710 connected to the spray controller 700 is provided, and the remote controller 710 is operated to control the opening and closing of each atomizing nozzle 600.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims (10)
1. A method for suppressing dust after iron charging of an iron ladle is characterized by comprising the following steps:
arranging a plurality of atomizing nozzles along a return path after charging iron on the iron ladle, enabling the plurality of atomizing nozzles to be positioned above the iron ladle, respectively connecting each atomizing nozzle with a water supply pipeline and a gas supply pipeline, and arranging an on-off switch on each atomizing nozzle;
the on-off switches of the atomizing nozzles are all connected with a spraying controller, the spraying controller controls the on-off switches of the atomizing nozzles to be sequentially turned on according to the return speed and the initial return time of the iron ladle, and each atomizing nozzle is turned off after the set duration;
each atomizing nozzle is configured to form fan-shaped sprays, and the spray widths of the adjacent fan-shaped sprays overlap 1/4-1/3 so that the iron ladle is continuously in the water mist cage.
2. The method of claim 1, wherein the set interval time is less than the set duration time.
3. The method for suppressing dust after iron ladle charging according to claim 1, wherein each atomizing nozzle is 3m to 5m away from the return path after iron ladle charging, and the jet flow angle formed by each atomizing nozzle is adjusted to 40 ° to 50 °.
4. The method of claim 3, wherein the atomizing nozzles are arranged every 2.3m to 2.7 m.
5. The method of claim 4, wherein the set interval time is 3s to 6s, and the set duration time is 10 s.
6. The method for suppressing dust after the iron ladle is charged with the iron according to claim 1, wherein a temperature sensor is arranged at the initial position of a return path after the iron ladle is charged with the iron, a temperature signal is sent out when the detection result of the temperature sensor reaches a set temperature, and the spray controller controls on-off switches of the plurality of atomizing nozzles to be sequentially turned on according to the temperature signal and at set intervals.
7. The method of claim 1, wherein the atomized particles sprayed from the atomizing nozzle have a diameter of 25 μm to 40 μm.
8. A method for suppressing dust after charging iron ladle according to any one of claims 1 to 7, wherein the direction of the jet of each atomizing nozzle is directed toward the incoming direction of the iron ladle.
9. The method for suppressing dust after iron charging of the iron ladle as claimed in claim 1, wherein the spray controller is provided with a remote controller, and the remote controller is operated to control the on-off switches of the plurality of atomizing nozzles to be turned on and off.
10. An iron ladle is added iron and is pressed down dirt device which characterized in that includes:
the water supply pipeline extends in parallel to a return path after the iron ladle is charged with iron, and a self-cleaning filtering device is arranged on the water supply pipeline;
the air supply pipeline is provided with a pressure stabilizing tank;
the atomizing nozzles are sequentially arranged along the water supply pipeline, are connected to the water supply pipeline in an adjustable direction and are respectively connected with the air supply pipeline, and each atomizing nozzle is provided with an on-off switch;
the temperature sensor is arranged at the initial position of a return path after the iron ladle is charged with iron;
the spray controller controls the on-off switches of the plurality of atomizing nozzles to be sequentially opened and closed along a return path after the iron ladle is charged with iron according to the detection result of the temperature sensor; each atomizing nozzle is configured to form fan-shaped sprays, and the spray widths of the adjacent fan-shaped sprays overlap 1/4-1/3 so that the iron ladle is continuously in the water mist cage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010964058.3A CN112023573B (en) | 2020-09-14 | 2020-09-14 | Dust suppression method after iron ladle iron adding and iron ladle iron adding dust suppression device |
Applications Claiming Priority (1)
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| DE2239373C2 (en) * | 1972-08-10 | 1978-05-24 | Gottfried Bischoff Bau Kompl. Gasreinigungs- Und Wasserrueckkuehlanlagen Gmbh U. Co Kg, 4300 Essen | System for dedusting the exhaust gases produced in a steel mill |
| CN105065056B (en) * | 2015-08-14 | 2017-03-29 | 山东科技大学 | A kind of underground coal mine multi-stage, energy-saving tunnel cleaning device |
| CN205368414U (en) * | 2016-02-02 | 2016-07-06 | 唐山恒联机电装备有限公司 | Automatic dust suppression device that sprays of blast furnace top hopper |
| CN109513286A (en) * | 2018-12-27 | 2019-03-26 | 中冶焦耐(大连)工程技术有限公司 | A kind of coke oven booth spray dust-arrest cooling device |
| CN209549036U (en) * | 2019-01-21 | 2019-10-29 | 河北金隅鼎鑫水泥有限公司 | Road dust suppression system |
| CN110694395A (en) * | 2019-09-30 | 2020-01-17 | 广东韶钢松山股份有限公司 | Dust removal device and method for rod and wire continuous rolling unit |
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