CN116179789B - Three-time dust removal end system of converter - Google Patents

Abstract

The present invention discloses a converter three-time dust removal terminal system, which relates to the field of metallurgical technology, including: a converter cross-house; a converter and a converter closed hood arranged in the converter cross-house, wherein the converter is located in the converter closed hood; a charging cross-house connected to the converter cross-house; a crane and a dust hood on the roof of the charging cross-house arranged in the charging cross-house; the converter closed hood has a charging port facing the crane, and the dust hood on the roof of the charging cross-house is located above the crane; a flue gas separator, wherein the lower end of the flue gas separator is connected to the converter closed hood, and the upper end of the flue gas separator is connected to the dust hood on the roof of the charging cross-house, so as to isolate the area below the dust hood on the roof of the charging cross-house in the charging cross-house from the area above the converter closed hood in the converter cross-house. The present application can solve the problem that flue gas spreads and pollutes each layer of platform after escaping from the converter closed hood.

Description

Converter three-stage dust removal terminal system

Technical Field

The invention relates to the technical field of metallurgy, and in particular to a converter tertiary dust removal terminal system.

Background Art

Implementing ultra-low emissions is one of the important measures to protect the blue sky and one of the main driving forces for the healthy development of the steel industry. Scientifically solve environmental problems, build energy-saving, emission-reducing and environmentally friendly industries, and develop pollution prevention and control technologies that are compatible with process production.

The converter uses molten iron and scrap steel as the main raw materials. It does not rely on external energy sources, but relies on the physical heat of the molten iron itself and the heat generated by the chemical reaction between the components of the molten iron to complete the steelmaking process in the converter. It has the characteristics of fast production speed, large output, and high single-furnace output. The converter will produce a lot of smoke and dust in the process of adding molten iron, adding scrap steel, blowing, and tapping molten steel, which needs to be collected and treated to avoid environmental pollution. When the converter completes the operation of adding molten iron and adding scrap steel in the charging span, a large amount of smoke will escape from the secondary dust removal hood of the converter. The tertiary dust removal system of the converter is used to capture this part of the smoke. The conventional practice is to set a dust collection hood on the roof of the converter charging span, and at the same time, the skylight and air tower on the roof of the converter charging span are closed.

The oxygen lance of the converter is located in the furnace span. During the converter refining process, the oxygen lance blows a large amount of oxygen, which causes a violent reaction in the converter. Although the oxygen lance mouth is equipped with a nitrogen seal or a steam seal, it cannot completely seal the flue gas, and the flue gas escapes to pollute the environment. In addition, the escaped flue gas carries carbon monoxide, which endangers the health of personnel and is also a major safety hazard. The conventional practice is to install a dust hood on the roof of the converter furnace span, and the dust hood is connected to the converter's tertiary dust removal system. At the same time, the skylight and air tower on the roof of the converter furnace span are closed. Since the converter workshop is a hot production workshop with a large indoor temperature gradient, the flue gas escaping from the converter's secondary dust hood rises and diffuses rapidly. When it reaches the roof height, the smoke concentration has been greatly reduced. At this time, collecting the smoke through the tertiary dust hood requires a large exhaust volume, and the corresponding dust collector and fan have high energy consumption, which will greatly increase the operating burden of environmental protection facilities. Moreover, the oxygen gun mouth is far away from the tertiary dust hood across the roof of the converter furnace. The flue gas escaping from the oxygen gun mouth first diffuses to the platforms across the converter furnace. When it reaches under the roof, the environment of each platform has been polluted by the flue gas. Therefore, the process method of the roof dust hood has certain defects.

Summary of the invention

In order to overcome the above-mentioned defects of the prior art, the technical problem to be solved by the embodiments of the present invention is to provide a converter tertiary dust removal terminal system, which can solve the problem of smoke spreading and polluting each platform after escaping from the converter closed hood.

The specific technical solution of the embodiment of the present invention is:

A converter tertiary dust removal terminal system, the converter tertiary dust removal terminal system comprising:

A converter cross-house; a converter and a converter closed cover arranged in the converter cross-house, wherein the converter is located in the converter closed cover;

A charging span connected to the converter span; a crane and a dust cover on the roof of the charging span arranged in the charging span; the converter closed cover has a charging port facing the crane, and the dust cover on the roof of the charging span is located above the crane;

A flue gas separator, the lower end of which is connected to the converter enclosure, and the upper end of which is connected to the roof dust hood of the charging span room, so as to isolate the area below the roof dust hood of the charging span room in the charging span room from the area above the converter enclosure in the converter span room.

Preferably, the converter bay includes a first side and a second side relative to each other, and a first roof surface, wherein the first side has a connecting notch; the charging bay includes a second roof surface and a plurality of third side surfaces, the second roof surface and the plurality of third side surfaces are connected at the connecting notch of the first side surface, so that the converter bay and the charging bay are integrated; the height of the second roof surface is lower than the first roof surface; the converter enclosure cover is arranged on a side close to the connecting notch and is located directly above the charging port, the overhead crane extends in a direction perpendicular to the first side surface, and one end of the overhead crane extends to the notch of the first side surface and directly above the charging port.

Preferably, the converter enclosure has an upper end surface, the flue gas separator extends in a vertical direction, and the lower end of the flue gas separator is connected to one end of the upper end surface of the converter enclosure close to the feeding port; the suction port of the feeding cross-roof dust hood has a rectangular cross-section in the horizontal direction, and the upper end of the flue gas separator is connected to the suction port of the feeding cross-roof dust hood close to the edge of the second side surface.

Preferably, a converter cross-house roof dust hood is provided on the first roof surface of the converter cross-house, and the loading cross-house roof dust hood is connected to the tertiary dust removal main pipeline through a first pipe; the converter cross-house roof dust hood is connected to the tertiary dust removal main pipeline through a second pipe; a first dust removal valve is provided on the first pipe, and a second dust removal valve is provided on the second pipe.

Preferably, a converter secondary air suction mechanism is provided in the converter enclosed hood, and the converter secondary air suction mechanism is located above the converter and close to the feeding port; the converter can rotate around a first rotating axis in a first rotating plane so that itself is facing the feeding port; the converter secondary air suction mechanism comprises an air suction slot body extending in the direction of the first rotating axis, the air suction slot body having a first air suction slot and a second air suction slot extending downward and parallel to each other, the first air suction slot and the second air suction slot are connected to the air suction slot body, the first air suction slot and the second air suction slot are respectively located on both sides of the first rotating plane, the air suction slot body has an air suction port facing downward, the first air suction slot and the second air suction slot respectively have an air suction port facing the first rotating plane; both ends of the air suction slot body are connected to the secondary dust removal main pipe.

Preferably, the converter tertiary dust removal terminal system also includes:

An oxygen lance vertically inserted into the converter enclosure, with a gap between the oxygen lance and the converter enclosure;

An oxygen lance dust cover is located outside the converter enclosed cover, and a suction port of the oxygen lance dust cover is located near the top of the gap between the oxygen lance and the converter enclosed cover. The oxygen lance dust cover is connected to the tertiary dust removal main pipeline through a third pipeline.

Preferably, there are two oxygen lance dust hoods, which are relatively arranged on both sides of the oxygen lance, and the suction ports of the two oxygen lance dust hoods are located on both sides of the oxygen lance and face the oxygen lance; each oxygen lance dust hood has the third pipe corresponding to itself, and each third pipe is provided with a third dust removal valve.

Preferably, the converter tertiary dust removal terminal system also includes:

A furnace mouth dust removal hood, wherein the suction port of the furnace mouth dust removal hood is located on the smoke partition and close to the feeding port;

The suction port of the furnace mouth dust removal cover faces one side of the overhead traveling crane.

Preferably, the suction port of the furnace mouth dust hood extends along the first rotating axis direction, the furnace mouth dust hood is connected to the tertiary dust removal main pipeline through a fourth pipeline, part of the fourth pipeline extends along the first rotating axis direction, the furnace mouth dust hood is connected to the side wall of the fourth pipeline extending along the first rotating axis direction, both ends of the fourth pipeline extending along the first rotating axis direction are connected to the tertiary dust removal main pipeline, and fourth dust removal valves are respectively provided at both ends of the fourth pipeline extending along the first rotating axis direction.

Preferably, a movable closed door capable of opening or closing the feeding port is provided at the feeding port; a tilting mechanism for tilting the converter is provided in the converter enclosed cover; the tilting mechanism is interlocked with the movable closed door, and when the tilting mechanism tilts the converter, the movable closed door opens; when the tilting mechanism does not tilt the converter, the movable closed door is closed.

The technical solution of the present invention has the following significant beneficial effects:

1. A smoke separator is used to isolate the area below the dust hood on the roof of the charging span in the charging span from the area above the converter closed hood in the converter span, thereby effectively preventing smoke from escaping into the converter span. On this basis, after the smoke escapes from the charging port of the converter closed hood, it is quickly sucked into the furnace mouth dust hood above, thereby reducing the amount of smoke escaping to the roof of the charging span, effectively reducing the burden on the dust hood on the roof of the charging span, and the whole system can achieve better dust removal effect.

2. The oxygen lance dust hood can collect the flue gas escaping from the oxygen lance before it is completely diffused, reducing the amount of flue gas escaping to the converter cross-house and diffusing to the converter cross-house roof, greatly reducing the burden on the dust hood on the converter cross-house roof.

3. The converter tertiary dust removal terminal system realizes the effective capture of flue gas near the release source, reduces the operating load of the converter cross-roof dust hood and the charging cross-roof dust hood, and can achieve good dust removal effect even if a smaller exhaust volume is used for both. The system designed in this way can save the construction cost of the dust removal system and the operating energy consumption of the dust removal fan, which is more advantageous than the conventional tertiary dust removal method.

With reference to the following description and drawings, specific embodiments of the present invention are disclosed in detail, indicating the manner in which the principles of the present invention can be adopted. It should be understood that the embodiments of the present invention are not limited in scope. Features described and/or shown for one embodiment can be used in one or more other embodiments in the same or similar manner, combined with features in other embodiments, or replace features in other embodiments.

BRIEF DESCRIPTION OF THE DRAWINGS

The accompanying drawings described herein are only for explanation purposes and are not intended to limit the scope of the present invention in any way. In addition, the shapes and proportional dimensions of the various components in the figures are only schematic, used to help understand the present invention, and are not specifically limited to the shapes and proportional dimensions of the various components of the present invention. Those skilled in the art can select various possible shapes and proportional dimensions to implement the present invention according to the specific circumstances under the guidance of the present invention.

FIG1 is a schematic structural diagram of a converter tertiary dust removal terminal system according to an embodiment of the present invention;

FIG2 is a top view of an oxygen lance dust cover and a furnace mouth dust cover in an embodiment of the present invention;

3 is a left side view of the furnace mouth dust cover and the converter secondary air suction mechanism in an embodiment of the present invention;

4 is a schematic structural diagram of a converter tertiary dust removal terminal system having a converter secondary air suction mechanism in an embodiment of the present invention.

Reference numerals of the above drawings:

1. Converter cross-house; 11. First side; 12. Second side; 13. First roof surface; 14. Connection gap; 2. Converter closed cover; 21. Charging port; 22. Converter secondary air suction mechanism; 221. Air suction slot body; 222. First air suction slot; 223. Second air suction slot; 3. Converter; 4. Charging cross-house; 41. Second roof surface; 42. Third side; 5. Overhead crane; 6. Dust hood on roof of charging cross-house; 61. First pipeline; 62. First dust removal valve; 7. Smoke separator; 8. Dust hood on roof of converter cross-house; 81. Second pipeline; 82. Second dust removal valve; 9. Tertiary dust removal main pipeline; 15. Oxygen gun; 16. Oxygen gun dust hood; 161. Third pipeline; 162. Third dust removal valve; 17. Furnace mouth dust hood; 171. Fourth pipeline; 172. Fourth dust removal valve.

DETAILED DESCRIPTION

The details of the present invention can be more clearly understood by combining the accompanying drawings and the description of the specific embodiments of the present invention. However, the specific embodiments of the present invention described herein are only used for the purpose of explaining the present invention and cannot be understood as limiting the present invention in any way. Under the guidance of the present invention, technicians can conceive of any possible variations based on the present invention, which should be regarded as belonging to the scope of the present invention. It should be noted that when an element is referred to as "arranged on" another element, it can be directly on another element or there can also be a central element. When an element is considered to be "connected" to another element, it can be directly connected to another element or there may be a central element at the same time. The terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a mechanical connection or an electrical connection, or it can be the communication between the two elements, it can be directly connected, or it can be indirectly connected through an intermediate medium. For ordinary technicians in the field, the specific meanings of the above terms can be understood according to the specific circumstances. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are only for illustrative purposes and do not represent the only implementation method.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and/or" used herein includes any and all combinations of one or more related listed items.

In order to solve the problem that flue gas spreads and pollutes each platform after escaping from the converter closed hood 2, a converter tertiary dust removal terminal system is proposed in the present application. Figure 1 is a structural schematic diagram of the converter tertiary dust removal terminal system in an embodiment of the present invention. As shown in Figure 1, the converter tertiary dust removal terminal system may include: a converter cross-house 1; a converter 3 and a converter closed hood 2 arranged in the converter cross-house 1, and the converter 3 is located in the converter closed hood 2; a charging cross-house 4 connected to the converter cross-house 1; a crane 5 and a dust hood 6 on the roof of the charging cross-house arranged in the charging cross-house 4; the converter closed hood 2 has a charging port 21 facing the crane 5, and the dust hood 6 on the roof of the charging cross-house is located above the crane 5; a flue gas separator 7, the lower end of the flue gas separator 7 is connected to the converter closed hood 2, and the upper end of the flue gas separator 7 is connected to the dust hood 6 on the roof of the charging cross-house, so as to isolate the area below the dust hood 6 on the roof of the charging cross-house in the charging cross-house 4 from the area above the converter closed hood 2 in the converter cross-house 1.

As shown in FIG1 , a converter 3 and a converter enclosed cover 2 are arranged in a converter bay 1, and the converter 3 is located in the converter enclosed cover 2. A crane 5 and a dust cover 6 on the roof of the charging bay 4 are arranged in the charging bay 4. The charging bay 4 is connected to the converter bay 1. The converter bay 1 includes a first side surface 11 and a second side surface 12 opposite to each other, and a first roof surface 13. The first roof surface 13 connects the upper ends of the first side surface 11 and the second side surface 12. The first side surface 11 has a connecting notch 14, and the connecting notch 14 is used to connect to the charging bay 4, so that the converter bay 1 and the charging bay 4 are internally connected.

As shown in Fig. 1, the charging bay 4 may include a second roof surface 41 and a plurality of third side surfaces 42, which are connected to the connection notch 14 of the first side surface 11, so that the converter bay 1 and the charging bay 4 are integrated. The height of the second roof surface 41 is lower than the first roof surface 13.

As shown in FIG1 , the converter enclosure 2 has a charging port 21 facing the crane 5, and the charging span roof dust removal cover 6 is located above the crane 5. The converter 3 can rotate around the first rotation axis in the first rotation plane to face the charging port 21. When the converter 3 is charged with iron or scrap steel, the furnace mouth of the converter 3 turns to the side of the charging span 4, that is, the charging port 21 of the converter enclosure 2, and the converter 3 maintains a certain inclination angle. During this period, the flue gas generated by the converter 3 will escape from the charging port 21 of the converter enclosure 2 in a short time. The crane 5 generally extends in a direction perpendicular to the first side 11 and the second side 12, and one end of the crane 5 extends to the notch of the first side 11 and the top of the charging port 21, so as to facilitate the crane 5 to pour the iron or scrap steel in the suspended container into the converter 3 through the charging port 21 of the converter enclosure 2. Similarly, as much as possible, the converter enclosure 2 is located on the side close to the charging span 4.

As shown in FIG1 , due to the obstruction of the overhead crane 5, there is no space below the overhead crane 5 to set the dust hood, so the dust hood 6 on the roof of the charging span can only be set between the second roof surface 41 of the charging span 4 and the overhead crane 5, and the dust hood 6 on the roof of the charging span can collect a large amount of flue gas escaping from the charging port 21 of the converter closed cover 2 to a certain extent. Further, the converter closed cover 2 can be set on the side close to the connection gap 14 and directly above the charging port 21.

The above method can only collect the smoke to be escaped when it diffuses between the second roof surface 41 and the overhead crane 5. Before the smoke to be escaped diffuses between the second roof surface 41 and the overhead crane 5, it will escape from between the overhead crane 5 and the charging port 21 of the converter enclosed hood 2, thereby entering the converter span room 1. Therefore, a smoke separator 7 can be provided between the converter enclosed hood 2 and the charging span room roof dust hood 6, the lower end of the smoke separator 7 is connected to the converter enclosed hood 2, and the upper end of the smoke separator 7 is connected to the charging span room roof dust hood 6. The smoke separator 7 can be a larger baffle, thereby isolating the area below the charging span room roof dust hood 6 in the charging span room 4 from the area above the converter enclosed hood 2 in the converter span room 1. Through the above-mentioned method, the smoke to be escaped cannot escape from between the overhead crane 5 and the feeding port 21 of the converter closed cover 2 into the converter cross-house 1 before it diffuses to between the second roof surface 41 and the overhead crane 5. Most of it can only diffuse upward and then be sucked into and collected by the dust hood 6 on the roof of the feeding cross-house.

As shown in FIG1 , the converter enclosed cover 2 can be in various shapes according to specific needs. The converter enclosed cover 2 has an upper end surface, and the smoke separator 7 extends in the vertical direction. The lower end of the smoke separator 7 is connected to one end of the upper end surface of the converter enclosed cover 2 near the charging port 21 by a sealing connection, so that the smoke just escaping from the converter enclosed cover 2 can be effectively blocked.

As shown in FIG1 , the cross-section of the suction port of the charging cross-roof dust hood 6 in the horizontal direction can generally be rectangular, so that it can have sufficient suction capacity for the smoke escaping from the converter enclosed hood 2 in two perpendicular directions on the horizontal plane. The upper end of the smoke separator 7 is connected to the edge of the suction port of the charging cross-roof dust hood 6 close to the second side 12 by a sealing connection, so that the smoke just escaping from the converter enclosed hood 2 can be effectively blocked, and the smoke is guided by the smoke separator 7 to enter the suction port of the charging cross-roof dust hood 6, thereby increasing the percentage of smoke being sucked.

As shown in Figure 1, a converter cross-house roof dust hood 8 is provided on the first roof surface 13 of the converter cross-house 1, and the converter cross-house roof dust hood 8 is connected to the tertiary dust removal main pipeline 9 through a second pipeline 81. The tertiary dust removal main pipeline 9 is located outside the converter cross-house 1 and the charging cross-house 4, and can be specifically located above the second roof surface 41 of the charging cross-house 4. The converter cross-house roof dust hood 8 is used to treat the flue gas and the like in the converter cross-house 1. Dust collectors, fans and other dust removal and negative pressure suction generating equipment are connected downstream of the tertiary dust removal main pipeline 9. Since the flue gas components in the converter cross-house 1 are relatively small at this time, the converter cross-house roof dust hood 8 only needs a smaller exhaust volume to meet the requirements, and the power of the dust collector and fan corresponding to the converter cross-house roof dust hood 8 can be relatively small, which greatly reduces energy consumption and reduces the operating burden of environmental protection facilities. In other feasible embodiments, the first roof surface 13 of the converter bay 1 can be completely closed on all sides, a dust removal duct can be connected to the upper end of the side of the converter bay 1, and the top of the entire converter bay 1 can be used as a dust removal exhaust hood.

As shown in FIG1 , the feeding cross-roof dust hood 6 is also connected to the tertiary dust removal main pipeline 9 through the first pipeline 61. Correspondingly, a first dust removal valve 62 may be provided on the first pipeline 61, and a second dust removal valve 82 may be provided on the second pipeline 81. The dust removal air volume may be adjusted by the dust removal valve, and the dust removal valve may be in the form of a manual, electric, electro-hydraulic or pneumatic valve, etc., which is not specifically limited in this application.

FIG3 is a left view of the furnace mouth dust removal cover and the converter secondary air suction mechanism in the embodiment of the present invention, and FIG4 is a structural schematic diagram of the converter tertiary dust removal terminal system with the converter secondary air suction mechanism in the embodiment of the present invention. As shown in FIG3 and FIG4, the converter closed cover 2 is provided with a converter secondary air suction mechanism 22. The converter secondary air suction mechanism 22 is used to collect and discharge the flue gas generated at the furnace mouth of the converter 3 and entering the converter closed cover 2. Further, the converter secondary air suction mechanism 22 is located above the converter 3 and close to the charging port 21. When the converter 3 rotates around the first rotating axis in the first rotating plane so that it faces the charging port 21, the overhead crane 5 pours the iron or scrap steel in the suspended container into the converter 3 through the charging port 21 of the converter closed cover 2, the converter secondary air suction mechanism 22 can also inhale the flue gas generated from the furnace mouth of the converter 3 to a certain extent, so as to reduce the amount of flue gas overflowing outside the converter closed cover 2.

As shown in FIG3 , the converter secondary air suction mechanism 22 may include an air suction slot body 221 extending along the first rotating axis direction, the air suction slot body 221 has a first air suction slot 222 and a second air suction slot 223 extending downwardly and parallel to each other, the first air suction slot 222 and the second air suction slot 223 are connected to the air suction slot body 221, the first air suction slot 222 and the second air suction slot 223 are respectively located on both sides of the first rotating surface, the air suction slot body 221 has an air suction port facing downward, the first air suction slot 222 and the second air suction slot 223 respectively have air suction ports facing the first rotating surface. The above structure allows the converter secondary air suction mechanism 22 to inhale smoke on both sides and above the converter 3, without affecting the converter 3 from tipping over toward the charging port 21.

Furthermore, as shown in FIG3 , both ends of the suction trough body 221 are connected to the secondary dust removal main pipe. This ensures that the first suction trough 222 and the second suction trough 223 have the same negative pressure suction force, and that different positions of the suction trough body 221 have higher negative pressure suction force, and there will be no problem of one end being too low and the other end being too high, and the suction capacity of flue gas at different positions is relatively uniform. The secondary dust removal main pipe is located inside the converter cross room. The secondary dust removal main pipe and the tertiary dust removal main pipe are two independent systems.

FIG2 is a top view of the oxygen lance dust hood and the furnace mouth dust hood in an embodiment of the present invention. As shown in FIG2 to FIG4, the converter tertiary dust removal terminal system may include: a furnace mouth dust hood 17. The suction port of the furnace mouth dust hood 17 is located on the flue gas partition 7 and close to the charging port 21. The suction port of the furnace mouth dust hood 17 faces the side of the overhead crane 5.

When the converter 3 rotates around the first rotating axis in the first rotating plane so that it faces the charging port 21, the overhead crane 5 pours the iron or scrap steel in the suspended container into the converter 3 through the charging port 21 of the converter closed hood 2, the flue gas just escaped from the converter closed hood 2 just diffuses upward from the charging port 21 of the converter closed hood 2, and the suction port of the furnace mouth dust hood 17 sucks in most of the flue gas from the horizontal direction for collection. In this way, the flue gas is effectively captured near the release source, reducing the operating load of the charging cross-roof dust hood 6, and the setting of the furnace mouth dust hood 17 will not affect the operation of the overhead crane 5, nor will it affect the charging of the converter 3 by the overhead crane 5.

Specifically, the suction port of the furnace mouth dust hood 17 extends along the first rotation axis direction, the furnace mouth dust hood 17 is connected to the tertiary dust removal main pipeline 9 through the fourth pipeline 171, part of the fourth pipeline 171 extends along the first rotation axis direction, the furnace mouth dust hood 17 is connected to the side wall of the fourth pipeline 171 extending along the first rotation axis direction, both ends of the fourth pipeline 171 extending along the first rotation axis direction are connected to the tertiary dust removal main pipeline 9, and both ends of the fourth pipeline 171 extending along the first rotation axis direction are respectively provided with fourth dust removal valves 172. Since the furnace mouth dust hood 17 is connected to the side wall of the fourth pipeline 171, and both ends of the fourth pipeline 171 are connected to the tertiary dust removal main pipeline 9, the furnace mouth dust hood 17 can generate relatively uniform suction at each location, and there will be no problem of one end being too large and the other end being too small, which will cause excessive smoke diffusion at the end with too small suction.

As shown in Figures 1, 2 and 4, the converter tertiary dust removal terminal system may include: an oxygen lance 15 inserted into the converter enclosed cover 2 in the vertical direction, and the oxygen lance 15 can be lifted and lowered by a lifting mechanism. The oxygen lance 15 is used to input oxygen into the converter enclosed cover 2. When it is necessary to input oxygen into the converter enclosed cover 2, the oxygen lance 15 is lowered and inserted into the converter enclosed cover 2. Since there is a gap between the oxygen lance 15 and the converter enclosed cover 2, after the oxygen lance 15 is lowered and inserted into the converter enclosed cover 2, the flue gas in the converter enclosed cover 2 will overflow from the gap into the converter cross room 1. When the oxygen lance 15 is not inserted into the converter enclosed cover 2, the port for inserting the oxygen supply lance 15 on the converter enclosed cover 2 can be closed by other mechanisms. Therefore, the converter tertiary dust removal terminal system may also include an oxygen lance dust removal cover 16 located outside the converter enclosed cover 2. The suction port of the oxygen lance dust cover 16 is located near the top of the gap between the oxygen lance 15 and the converter closed cover 2, and the oxygen lance dust cover 16 is connected to the tertiary dust removal main pipeline 9 through the third pipeline 161. The smoke that will overflow from the gap is effectively captured at the first time and near the release source through the oxygen lance dust cover 16, reducing the operating load of the oxygen lance dust cover 16. Further, there can be two oxygen lance dust covers 16, and the two oxygen lance dust covers 16 are relatively arranged on both sides of the oxygen lance 15. The suction ports of the two oxygen lance dust covers 16 are located on both sides of the oxygen lance 15 and face the oxygen lance 15. Each oxygen lance dust cover 16 has a third pipeline 161 corresponding to itself, and each third pipeline 161 is provided with a third dust removal valve 162. The two third pipelines 161 extend in the horizontal direction, and can be connected to the two ends of the fourth pipeline 171 respectively, and then connected to the tertiary dust removal main pipeline 9 through the pipeline together, which can effectively reduce the resistance of the pipeline.

In order to prevent the flue gas from overflowing from the feeding port 21 of the converter closed cover 2 when adding materials to the converter 3, a movable closed door capable of opening or closing the feeding port 21 is provided at the feeding port 21. A tilting mechanism for tilting the converter 3 is provided inside the converter closed cover 2. The tilting mechanism is interlocked with the movable closed door. When the tilting mechanism tilts the converter 3, the movable closed door opens; when the tilting mechanism does not tilt the converter 3, the movable closed door closes. Similarly, the third dust removal valve 162 corresponding to the oxygen lance dust removal cover 16 is also interlocked with the lifting mechanism for lifting the oxygen lance 15. When the oxygen lance 15 is lowered by the lifting mechanism and inserted into the converter closed cover 2 for blowing, the third dust removal valve 162 corresponding to the oxygen lance dust removal cover 16 is automatically opened to effectively capture the flue gas overflowing from the gap.

The converter three-stage dust removal terminal system in the present application can first isolate the area below the charging span roof dust cover 6 in the charging span house 4 from the area above the converter closed hood 2 in the converter span house 1 through the flue gas partition 7, so that the flue gas escaping from the charging port 21 of the converter closed hood 2 is difficult to enter the area above the converter closed hood 2; secondly, at the same time, a charging span roof dust cover 6 facing downward is arranged above the charging port 21, and a furnace mouth dust cover 17 facing one side of the charging span is arranged near the charging port 21, An oxygen lance dust hood 16 facing the oxygen lance is provided at the oxygen lance 15 of the closed cover 2. Through the above three methods and the cooperation of the smoke separator, the smoke escaping from the feeding port 21 is collected before it is completely diffused. Compared with the existing process of only setting three dust hoods on the roof, the various dust hoods in this application are closer to the pollution source and have a better dust removal effect. Dust removal nearby can effectively reduce the cost of the dust removal system. In addition, the design air volume of the roof dust hood can be reduced. After the overall amount of dust removal and smoke exhaust is reduced, its investment and operation can be more economical. Moreover, due to the existence of the smoke separator 7, the smoke escaping to the converter cross-house 1 and the diffusion to the roof of the converter cross-house 1 can be greatly reduced, so that the dust hood 6 on the roof of the feeding cross-house and the dust hood 17 at the furnace mouth can fully absorb the smoke and effectively increase the percentage of smoke inhaled.

The converter three-stage dust removal terminal system in the present application can have the following advantages: 1. The area below the dust hood 6 on the roof of the charging span 4 in the charging span 4 is isolated from the area above the converter closed hood 2 in the converter span 1 by using the flue gas separator 7, effectively preventing the flue gas from escaping into the converter span 1. On this basis, after the flue gas escapes from the charging port 21 of the converter closed hood 2, it is quickly sucked into the furnace mouth dust hood 17 above, thereby reducing the amount of flue gas escaping to the roof of the charging span 4, effectively reducing the burden of the dust hood 6 on the roof of the charging span, and the whole system can achieve better dust removal effect. 2. The oxygen gun dust hood 16 can make the flue gas escaping from the oxygen gun 15 be collected before it is completely diffused, reducing the amount of flue gas escaping to the converter span 1 and diffusing to the roof of the converter span 1, greatly reducing the burden of the dust hood 8 on the roof of the converter span. 3. The converter tertiary dust removal terminal system realizes the effective capture of flue gas near the release source, reduces the operating load of the converter cross-roof dust hood 8 and the charging cross-roof dust hood 6, and can achieve a good dust removal effect even if a smaller exhaust volume is used for both. The system designed in this way can save the construction cost of the dust removal system and the operating energy consumption of the dust removal fan, which is more advantageous than the conventional tertiary dust removal method.

All articles and references disclosed, including patent applications and publications, are incorporated herein by reference for various purposes. The term "consisting essentially of ... " describing a combination should include determined elements, ingredients, parts or steps and other elements, ingredients, parts or steps that do not substantially affect the basic novel features of the combination. The combination of elements, ingredients, parts or steps described here using the terms "comprising" or "including" also contemplates an embodiment consisting essentially of these elements, ingredients, parts or steps. By using the term "may", it is intended to illustrate that any attribute described that "may" include is optional. Multiple elements, ingredients, parts or steps can be provided by a single integrated element, ingredient, part or step. Alternatively, a single integrated element, ingredient, part or step can be divided into separate multiple elements, ingredients, parts or steps. The disclosure "one" or "one" used to describe an element, ingredient, part or step is not said to exclude other elements, ingredients, parts or steps.

Each embodiment in this specification is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. The above embodiments are only for illustrating the technical concept and features of the present invention. The purpose is to enable people familiar with this technology to understand the content of the present invention and implement it accordingly, and it cannot be used to limit the scope of protection of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be covered within the scope of protection of the present invention.

Claims (8)

1. A converter three-time dust removal end system is characterized in that, the converter tertiary dust removal end system comprises:

A converter spans a house; the converter is arranged in the converter cross room, and the converter is arranged in the converter sealing cover;

a charging cross-room connected with the converter cross-room; the crown block and the charging cross-house roof dust hood are arranged in the charging cross-house; the converter sealing cover is provided with a charging port facing the crown block, and the charging cross-roof dust hood is positioned above the crown block;

a flue gas separator, the lower end of the flue gas separator is connected to the converter enclosure, and the upper end of the flue gas separator is connected to the charging cross-roof dust hood to isolate a region below the charging cross-roof dust hood in the charging cross-roof from a region above the converter enclosure in the converter cross-roof;

A converter secondary air suction mechanism is arranged in the converter closed cover, and is positioned above the converter and close to the charging port; the converter can rotate around a first rotating shaft in a first rotating surface so as to enable the converter to face the charging port; the converter secondary air suction mechanism comprises an air suction groove body extending along the first rotating shaft direction, wherein a first air suction groove and a second air suction groove which extend downwards and are parallel are formed in the air suction groove body, the first air suction groove and the second air suction groove are communicated with the air suction groove body, the first air suction groove and the second air suction groove are respectively positioned at two sides of the first rotating surface, an air suction opening facing downwards is formed in the air suction groove body, and an air suction opening facing towards the first rotating surface is formed in the first air suction groove and the second air suction groove respectively; both ends of the air suction groove body are connected with a secondary dust collection main pipe;

the converter tertiary dust removal end system further comprises:

An oxygen lance inserted into the converter sealing cover along the vertical direction, wherein a gap exists between the oxygen lance and the converter sealing cover;

The oxygen lance dust hood is positioned outside the converter closed hood, the suction inlet of the oxygen lance dust hood is positioned near the upper part of a gap between the oxygen lance and the converter closed hood, and the oxygen lance dust hood is connected with the tertiary dust removal main pipeline through a third pipeline.

2. The converter tertiary dedusting end system of claim 1, wherein the converter cross-house includes opposing first and second sides, a first roof surface, wherein the first side has a connection gap; the charging cross-room comprises a second roof surface and a plurality of third side surfaces, and the second roof surface and the third side surfaces are connected at the connecting notch of the first side surfaces so that the converter cross-room and the charging cross-room are integrated; the second roof surface is lower than the first roof surface in height; the converter airtight cover is arranged on one side close to the connecting notch and is positioned right above the charging port, the crown block extends along the direction vertical to the first side face, and one end of the crown block extends to the notch of the first side face and the position right above the charging port.

3. The converter tertiary dust removal end system of claim 2, wherein the converter enclosure has an upper end face, the flue gas partition extends in a vertical direction, and a lower end of the flue gas partition is connected to an end of the upper end face of the converter enclosure near the feed port; the cross section of the suction inlet of the feeding cross-roof dust hood in the horizontal direction is rectangular, and the upper end of the flue gas separator is connected to the edge, close to the second side surface, of the suction inlet of the feeding cross-roof dust hood.

4. A converter tertiary dust removal end system according to claim 3, wherein a converter cross-roof dust removal hood is arranged on a first roof surface of the converter cross-roof, and the charging cross-roof dust removal hood is connected to a tertiary dust removal main pipeline through a first pipeline; the converter cross-roof dust hood is connected to the tertiary dust removal main pipeline through a second pipeline; the first pipeline is provided with a first dust removal valve, and the second pipeline is provided with a second dust removal valve.

5. The converter tertiary dust removal end system of claim 1, wherein the number of the oxygen lance dust removal hoods is two, the two oxygen lance dust removal hoods are oppositely arranged at two sides of the oxygen lance, and the suction inlets of the two oxygen lance dust removal hoods are positioned at two sides of the oxygen lance and face the oxygen lance; each oxygen lance dust hood is provided with a third pipeline corresponding to the oxygen lance dust hood, and a third dust removal valve is arranged on each third pipeline.

6. The three-time dust removing end system of a converter according to claim 3, the converter three-time dedusting end system is characterized by further comprising:

the suction inlet of the furnace mouth dust hood is positioned on the flue gas separator and is close to the feed inlet;

The suction inlet of the furnace mouth dust hood faces one side of the crown block.

7. The converter tertiary dust removal end system of claim 6, wherein the suction inlet of the furnace mouth dust removal hood extends along a first rotational axis direction, the furnace mouth dust removal hood is connected with the tertiary dust removal main pipe through a fourth pipe, a part of the fourth pipe extends along the first rotational axis direction, the furnace mouth dust removal hood is connected to the side wall of the fourth pipe extending along the first rotational axis direction, two ends of the fourth pipe extending along the first rotational axis direction are connected with the tertiary dust removal main pipe, and two ends of the fourth pipe extending along the first rotational axis direction are respectively provided with a fourth dust removal valve.

8. The converter tertiary dust removal end system according to claim 1, wherein a movable closing door capable of opening or closing the charging opening is arranged at the charging opening; a tilting mechanism for realizing tilting of the converter is arranged in the converter closed cover; the tipping mechanism is connected with the movable closed door in a locking way, and when the tipping mechanism tips the converter, the movable closed door is opened; the movable closing door is closed when the tilting mechanism does not tilt the converter.