KR20200063632A - Damper apparatus and processing method for gas using the same - Google Patents

Abstract

The present invention provides a damper apparatus and a gas treatment method using the same. The damper apparatus of the present invention includes: a damper unit disposed inside a duct unit; an operation unit connected to the damper unit and adjusting a position of the damper unit; and a gap inspection unit installed to penetrate the duct unit, and inspecting a flow path gap between the duct unit and the damper unit. The damper apparatus adjusts a flow rate of a gas flowing inside the duct unit. The damper apparatus and the gas treatment method can easily inspect the flow path gap between the damper unit and the duct unit in real time.

Description

Damper device and gas treatment method using the same{DAMPER APPARATUS AND PROCESSING METHOD FOR GAS USING THE SAME}

The present invention relates to a damper device and a gas treatment method using the same, and more particularly, to a damper device that can easily check the flow path spacing between the damper portion and the duct portion in real time and a gas treatment method using the same.

The converter refining process proceeds in the order of the process of taking molten iron into the converter, the process of preparing the molten steel by blowing oxygen into the converter and blowing the molten iron, and the process of exiting the molten steel. Gas is generated inside the converter during this series of processes. In order to recover the gas generated inside the converter, a hood is installed on the upper part of the converter, and the hood is connected to an induced draft fan through a duct. A gas holder and a stack are connected to the manned ventilator. When a negative pressure is formed in the duct by an induction fan, the gas generated in the converter is sucked out of the converter and sucked into the hood. Thereafter, the gas is passed through a duct and a man-made ventilation fan, stored in a gas holder, or burned and exhausted from the stack.

On the other hand, the gas generated inside the converter is high temperature and contains a large amount of dust. When gas generated inside the converter is drawn out of the converter through the hood, an explosion may occur if air is introduced into the hood.

To prevent this, install a ring slit washer damper (RSW Damper, Ring Slit Washer Damper) inside the duct, while the inducing fan creates negative pressure inside the duct, the inlet pressure of the hood facing the converter is the pressure outside the hood. For example, to follow atmospheric pressure, the position of the ring slit washer damper is adjusted to control the flow rate of gas passing between the ring slit washer damper and the duct. Specifically, by adjusting the position of the ring slit washer damper to adjust the flow path spacing between the ring slit washer damper and the duct, the flow rate of the gas passing through the duct is adjusted, from which the gauge pressure at the hood inlet is zero.

On the other hand, if dust adheres to the surface of the damper, the distance between the damper and the duct may change. In this case, it is difficult to adjust the gas flow rate using a damper. Therefore, in the prior art, a part of the duct was dismantled during the resting period of the converter refining process, and the distance between the ring slit washer damper and the duct was directly measured while the operator adjusted the position of the ring slit washer damper.

The technology underlying the present invention is published in the following patent documents.

KR 10-2003-0037846 A KR 10-1697095 B1

The present invention provides a damper device that can easily check the flow path between the damper portion and the duct portion in real time and a gas treatment method using the same.

A damper device according to an embodiment of the present invention includes: a damper device that controls a flow rate of gas flowing inside the duct part, the damper part being disposed inside the duct part; An operating unit connected to the damper unit and adjusting a position of the damper unit; It is installed to penetrate the duct portion, the gap inspection unit for inspecting the flow path gap between the duct portion and the damper portion.

The duct portion includes a shrinking part in which the cross-sectional area gradually decreases in the gas flow direction and an expansion part in which the cross-sectional area gradually increases, and the damper part has a shape in which the cross-sectional area increases in the gas flow direction, and a lower portion having a large cross-sectional area is provided to the expansion part. It is arranged, forming a flow path between the expansion parts, and adjusting the position to change the flow path spacing, the gap inspection unit is installed in the expansion part in a direction crossing the flow direction of the gas, the damper portion It can contact the lower part.

A plurality of the gap inspection units are provided, arranged along the circumference of the expansion part, and can be installed radially.

The gap inspection unit may include an inspection member and a cylindrical member so as to inspect the gap between the flow paths using contact with the damper unit.

The inspection member extends in a direction crossing the flow direction of the gas, and is installed to protrude outside the duct part while contacting the damper part, and using the change in the protruding length of the inspection member outside the duct part You can check the gap.

The gap inspection unit may further include a roller member disposed inside the duct portion and supported at an end of the inspection member, and the inspection member may contact the damper unit through the roller member.

The tubular member is installed to surround the protruding portion of the inspection member from the outside of the duct portion, and may include a transparent material.

The tubular member may have a plurality of scales so as to inspect the flow path spacing using the protruding length of the inspection member.

The gap inspection unit, an elastic member disposed inside the cylindrical member, elastically supporting the inspection member; A guide member surrounding the outside of the inspection member between the cylindrical member and the duct portion may be further included.

The gap inspection unit may further include a removal member that is installed to penetrate the tube member and removes foreign substances attached to the inner surface of the tube member.

A gas treatment method according to an embodiment of the present invention includes a process of charging and treating a treatment product in a treatment facility; A process of sucking gas generated in the treatment facility into a duct; Checking a flow path gap between the damper portion and the duct portion disposed inside the duct portion using a gap adjusting portion installed to penetrate the duct portion; And adjusting the flow rate of the gas flowing inside the duct portion by adjusting the position of the damper portion using the flow path gap.

The process of adjusting the flow rate may include: maintaining a position of the damper part when the flow path spacing at a position of the damper part maintains a reference interval; When the distance between the flow paths in one position of the damper is changed, a process of adjusting the position of the damper part to another position to set the flow path distance as a reference interval may include.

The process of inspecting the passage gap may include contacting the inspection member with the gap adjusting part and the damper part; And inspecting a change in the protruding length of the inspection member from the outside of the duct portion.

In the process of contacting the inspection member and the damper part, the inspection member is brought into contact with the damper part through a roller member supported at an end of the inspection member inside the duct part, and the elastic member connected to the inspection member is used to The inspection member can be elastically supported.

In the process of inspecting the change in the protruding length, a change in the protruding length of the inspecting member may be inspected by using a scale provided on a cylindrical member made of a transparent material to surround the inspecting member outside the duct portion.

According to an embodiment of the present invention, by adjusting the position of the damper portion disposed inside the duct portion to adjust the flow path spacing between the damper portion and the duct portion and to control the flow rate of gas passing through the duct portion. At this time, the inspection member installed to penetrate the duct portion is brought into contact with the damper portion, and the protruding length of the inspection member is inspected outside the duct portion to easily check the flow path distance between the damper portion and the duct portion in real time.

Accordingly, the flow path spacing between the damper portion and the duct portion can be accurately known in real time, and accordingly, the position of the damper portion can be accurately controlled. Therefore, it is possible to accurately control the flow rate of the gas passing through the duct portion, from which the internal pressure of the hood connected to the duct portion can be accurately controlled according to the atmospheric pressure outside the hood.

Accordingly, while the gas is drawn from the treatment facility and sucked into the hood, it is possible to prevent external air from flowing into the hood, thereby preventing the gas from exploding or burning inside the hood. From this, the gas can be stably sucked into the hood in the treatment facility, and the gas generated in the treatment facility can be stably recovered.

1 is a schematic diagram of a treatment facility, a gas processing facility, and a damper device according to an embodiment of the present invention.
2 is an enlarged view of a damper device according to an embodiment of the present invention.
3 is a partially enlarged view of a damper device according to an embodiment of the present invention.
4 and 5 are enlarged views of a gap inspection unit of a damper device according to an embodiment of the present invention.
6 is an exploded perspective view of a gap inspection unit according to an embodiment of the present invention.
7 is a partially enlarged view of a cylindrical member and a foreign material removing member of a gap inspection unit according to a modified example of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, and will be implemented in various different forms. Only the embodiments of the present invention are provided to make the disclosure of the present invention complete, and to fully inform the scope of the invention to those skilled in the art. The drawings may be exaggerated to describe embodiments of the present invention, and the same reference numerals in the drawings refer to the same elements.

Hereinafter, embodiments of the present invention will be described in detail based on a gas treatment facility for collecting gas generated from a converter and a damper device provided therein. However, the gas treatment facility and the damper device according to the exemplary embodiment of the present invention may be connected to various treatment facility facilities in addition to the converter to be used for gas collection.

1 is a schematic diagram of a treatment facility, a gas processing facility, and a damper device according to an embodiment of the present invention.

Referring to Figure 1, a treatment facility and a gas treatment facility according to an embodiment of the present invention.

The treatment facility includes a converter 1 that can receive and blow molten iron, for example, as a reactor capable of receiving melt and processing in various ways. The converter 1 has an inner space, a nogu is formed at the top, and a lance 11 can be disposed to penetrate the nogu. Of course, the treatment facility may include facilities for processing various treatments in addition to the converter 1 described above.

It is possible to manufacture molten steel by introducing molten iron, scrap metal, and auxiliary materials into the interior space of the converter 1 and blowing oxygen into the molten iron through the lance 11 to refine it. At this time, a large amount of gas mixed with dust may be generated. A large amount of gas may flow out of the converter 1 through the furnace. In order to recover a large amount of gas, a gas treatment facility may be installed to surround the upper portion of the converter 1.

Gas treatment facilities are hood 100, duct 200, dust collector 300, first tank 310, manned ventilator 400, damper device 500, second tank 600, gas holder 700 And a stack 800.

The hood 100 may be opened to the inside of the lower side, and may be installed to surround the furnace port of the converter 1 at a position facing the converter 1 in the vertical direction. The hood 100 can extract gas from the furnace port of the converter 1. The hood 100 may be connected to the duct 200. Gas drawn into the hood 100 may be introduced into the duct 200.

The duct 200 may include a first duct 210, a second duct 220, a third duct 230, and a fourth duct 240. The first duct 210 may connect the hood 100 and the dust collector 300, and the second duct 220 may connect the dust collector 300 and the manned blower 400. In addition, the third duct 230 may connect the manned blower 400 and the gas holder 700, and the fourth duct 240 may connect the third duct 230 and the stack 800.

The dust collector 300 may be, for example, a saturator. The dust collector 300 extends in the vertical direction, and a gas passage (not shown) and a plurality of nozzles (not shown) may be provided therein. The plurality of nozzles may be connected to a water collection tank (not shown), and may receive cooling water from the water collection tank and spray the gas passage. The gas passing through the gas passage is cooled by injection of cooling water, and dust in the gas may be collected in the cooling water.

Cooling water and dust may be stored in the first tank 310 connected to the bottom of the dust collector 300. The first tank 310 may be connected to a water collection tank through a sedimentation tank (not shown). Cooling water and dust may be introduced into the sedimentation tank, dust may remain in the sedimentation tank, and cooling water may be recovered into the collection tank.

The manned blower 400 may be connected to the dust collector 300 through the second duct 220. The manned blower 400 may form a negative pressure inside the second duct 220. By the negative pressure, gas is sucked from the furnace port of the converter 1 into the hood 100, and a gas flow from the hood 100 through the dust collector 300 to the second duct 220 may be formed.

When the inlet pressure of the hood 100 follows atmospheric pressure, that is, when the inlet pressure of the hood 100 maintains atmospheric pressure, gas can be smoothly sucked into the hood 100. When the inlet pressure of the hood 100 is less than atmospheric pressure, gas as well as air may be introduced together through the inlet of the hood 100. Air introduced into the hood 100 may react with gas and dust to cause an explosion.

Therefore, the flow rate of the gas flowing inside the duct 200 is adjusted so that the inlet pressure of the hood 100 maintains atmospheric pressure. To this end, by installing the damper device 500 in the duct 200, specifically, the second duct 220, and using the damper device 500 to adjust the flow rate of the gas flowing inside the second duct 220 , The inlet pressure of the hood 100 maintains atmospheric pressure.

At this time, the reason for installing the damper device 500 in the second duct 220 is that the gas flowing inside the first duct 210 is higher than the gas flowing inside the second duct 220 and contains a large amount of dust. Because it is doing.

Gas that has passed through the manned blower 400 may be stored in the gas holder 700 through the third duct 230. Alternatively, the gas that has passed through the attraction blower 400 may be supplied to the stack 800 through the fourth duct 240, and may be burned and exhausted from the stack 800.

For example, if the gas has a carbon monoxide component of a predetermined content or more, the storage valve 910 mounted on the third duct 230 is opened, and the exhaust valve 920 mounted on the fourth duct 240 is closed. Accordingly, the gas can be stored in the gas holder 700.

On the other hand, if the carbon monoxide component is less than a predetermined content in the gas, the storage valve 910 mounted on the third duct 230 is closed, and the exhaust valve 920 mounted on the fourth duct 240 is opened. Accordingly, gas may be supplied to the stack 800 to be burned and exhausted.

Here, the carbon monoxide content in the gas can be obtained by analyzing the components of the gas using a gas analyzer (not shown) installed at a predetermined position in the second duct 220.

The second tank 600 may be installed in the second duct 200 between the damper device 500 and the manned blower 400 so that condensate condensed in the second duct 220 can be recovered. The second tank 600 may be connected to a water collection tank through a sedimentation tank.

FIG. 2 is an enlarged view of a damper device according to an embodiment of the present invention showing an enlarged portion A of FIG. 1. 3 is a partially enlarged view of a damper device according to an embodiment of the present invention. 3(a) is a partially enlarged view of the damper part of the damper device, and FIG. 3(b) is a partially enlarged view of the support part of the damper device shown by cutting the part C-C' of FIG. 2. 4 is an enlarged view of a gap inspection unit of a damper device according to an embodiment of the present invention showing an enlarged portion B of FIG. 2. 5 is an enlarged view of a gap inspection unit when dust is attached to the damper unit. 6 is an exploded perspective view of a gap inspection unit according to an embodiment of the present invention.

1 to 6, the damper device 500 according to an embodiment of the present invention will be described in detail. In this case, hereinafter, the second duct 220 is referred to as a'duct part 220'.

The damper device 500 is connected to the damper portion 510 disposed inside the duct portion 220, the damper portion 510, and the operation portion 520 to adjust the position of the damper portion 510, and the duct It is installed to penetrate the portion 220, and includes an interval inspection unit 550 for inspecting the flow path spacing t between the duct unit 220 and the damper unit 510. In this case, the gap inspection unit 550 may be installed to protrude to the outside of the duct unit 220 while contacting the damper unit 510.

The above-described damper device 500 adjusts the position of the damper unit 510 in the vertical direction, thereby adjusting the flow path spacing t between the duct unit 220 and the damper unit 510, thereby allowing the interior of the duct unit 220 to be adjusted. It is possible to adjust the flow rate of the gas flowing.

On the other hand, the damper device 500 is spaced downward from the damper unit 510, is installed on the upper portion of the support unit 530 and the duct unit 220 supporting the lower end of the operating unit 520, the operating unit 520 ) It may further include a cylinder portion 540 to elevate in the vertical direction.

The duct part 220 may include an inlet part 221, a collapsed part 222, an expanded part 223, and an outlet part 224. At this time, gas may flow from the inlet part 221 through the reduction part 222 and the expansion part 223 to the outlet part 224. At this time, inside the reduction part 222 and the expansion part 223, the flow direction of the gas may be downward.

The entrance part 221 may be provided with a curved pipe and a straight pipe at the upper and lower portions. The bent pipe may be connected to the dust collector 300. And the intuition may be connected to the reduction part 222. The reduction part 222 may extend downwardly of the intuition. The reduction part 222 may have a smaller cross-sectional area in the flow direction of the gas, and at this time, the shape of the cross-section may be circular. The reduction part 222 may be referred to as a taper tube. The expansion part 223 may be connected to the lower end of the reduction part 222.

The extension part 223 may extend downward. The expansion part 223 may gradually increase in cross-sectional area in the gas flow direction, and in this case, the shape of the cross-section may be circular. The expansion part 223 may be referred to as a venturi tube. The exit part 224 may be connected to the lower end of the expansion part 223.

The outlet part 224 may include a vertical tube, a curved tube, and a horizontal tube. The vertical tube is located above the outlet part 224, extends downward, and can be connected to the expansion part 223. The horizontal tube is located under the outlet part 224 and can be connected to the manned blower 400. The bent pipe is located at a connecting portion connecting the upper and lower portions of the outlet part 224, and may connect a vertical pipe and a horizontal pipe.

The damper part 510 may be disposed inside the duct part 220. The damper part 510 may have a shape in which a cross-sectional area increases in a gas flow direction. Specifically, the damper part 510 may have a horn shape or a horn shape extending in a gas flow direction. The lower portion of the damper portion 510 having a large cross-sectional area may be disposed in the expansion part 223. The upper portion having a small cross-sectional area of the damper portion 510 may be disposed in the inlet part 221 and the reduced part 222.

The shape of the cross section of the damper part 510, for example, a cross section, may correspond to the shape of the cross section of the duct part 220. Congruence means that the form is a resemblance. That is, if the cross-sectional shape of the duct portion 220 is circular, the cross-sectional shape of the damper portion 510 may also be circular. Accordingly, the damper portion 510 may be conical or truncated (see FIG. 3(a)).

The damper part 510 may form a flow path between the expansion part and the expansion part. More specifically, the outer peripheral surface of the lower portion of the damper portion 510 may be spaced apart from the inner peripheral surface of the expansion part 223 to form a flow path of gas. The damper unit 510 may change the flow path spacing t by adjusting the position in the gas flow direction. That is, when the height of the damper unit 510 in the vertical direction, for example, the height of the damper unit 510 is changed, the flow path spacing t between the outer peripheral surface of the lower portion of the damper unit 510 and the inner peripheral surface of the expansion part 223 may be changed. have. In this way, the damper unit 510 controls the flow rate of the gas flowing inside the duct unit 220 by changing the flow path spacing t to control the inlet pressure of the hood 100 connected to the duct unit 220. have.

To adjust the height of the damper unit 510, the operation unit 520 may be connected to the damper unit 510. The operation unit 520 may be a kind of shaft. The operation unit 520 may extend in the vertical direction. The operation part 520 may be mounted such that the upper part penetrates the straight pipe of the inlet part 221 in the vertical direction, and the lower part penetrates the damper part 510 in the vertical direction.

The upper end of the operation unit 520 protrudes a predetermined length toward the upper side of the straight pipe of the inlet part 221, and may be supported by the cylinder unit 540. The lower end of the operation unit 520 protrudes a predetermined length below the damper unit 510 and may be supported by the support unit 530.

The cylinder portion 540 may move the operation portion 520 up and down using hydraulic pressure. Accordingly, the operation unit 520 may be elevated in the vertical direction by the cylinder unit 540, and the height of the damper unit 510 may be adjusted. The support part 530 can stably support the operation part 520 by contact-supporting the lower end of the operation part 520 when the operation part 520 is elevated (see FIG. 3(b) ). More specifically, the support part 530 may be radially mounted to the vertical tube of the outlet part 224, and may contact and support the lower end of the operation part 520.

When the damper unit 510 rises to adjust the flow path spacing t of the gas flow path to the minimum size and when the damper portion 510 descends to adjust the flow path spacing t of the gas flow path to the maximum size, the operating portion 520 The up and down stroke (X) of may be about 600 mm. At this time, the minimum size of the flow path spacing t is about 20 mm, and the tolerance may be ±10 mm. The maximum size of the flow path spacing t is about 175 to 176 mm, and the tolerance may be ±10 mm.

The size of the elevating stroke X and the passage gap t has a linear relationship. That is, when the elevating stroke X is 0 mm, the size of the flow path interval t is the minimum, and when the elevating stroke X is 600 mm, the size of the flow path interval t may be the maximum. . Here, the above-described values are an example for the description of the embodiment.

When dust remains in the gas passing through the duct part 220, dust is attached to the outer circumferential surface of the damper part 510, and thus, the size relationship between the elevating stroke X and the passage gap t may be different. . Therefore, it is necessary to check the size of the flow path spacing t during the operation of the damper device 500 and to correct the size relationship between the elevating stroke X and the flow path spacing t based on the inspection results.

To this end, the damper device 500 includes a gap inspection unit 550.

The gap inspection unit 550 may be installed to penetrate the duct portion 220, contact the damper portion 510, and inspect the flow path spacing t between the duct portion 220 and the damper portion 510. The gap inspection unit 550 is installed in the expansion part 223 in a direction crossing the flow direction of the gas, and may contact the outer peripheral surface of the lower portion of the damper unit 510.

A plurality of gap inspection units 550 are provided, are arranged along the circumference of the expansion part 223, and may be installed radially. The larger the number of the gap inspection units 550, the more accurately the size of the flow path gap t of the gas flow path can be inspected. At this time, the size of the flow path interval t may use an average value of the values to be inspected. Of course, the number of interval inspection units 550 may be one.

The gap inspection unit 550 may include an inspection member 551 and a cylindrical member 554 to inspect the flow path spacing t using contact with the damper unit 510. The inspection member 551 may be installed to extend in a direction crossing the flow direction of the gas, and protrude to the outside of the expansion part 223 while contacting the damper part 510. At this time, when dust is attached to the outer circumferential surface of the damper part 510, the flow path spacing t'changes, and the inspection member 551 may have a protruding length of a portion protruding outward from the expansion part 223 ( 5).

The cylindrical member 554 may be installed to surround the protruding portion of the inspection member 551 from the outside of the expansion part 223.

In addition, the gap inspection part 550 is disposed inside the duct part 220, supported by the end of the inspection member 551, and the roller member 555 contacting the damper part 510, intersecting the gas flow direction An inspection member 551 extending in one direction, disposed inside the cylindrical member 554, and elastically supporting the inspection member 551, between the elastic member 556 and the cylindrical member 554 and the expansion part 223 It may further include a guide member (552, 553) surrounding the outside.

The inspection member 551 may be in the form of a bar or a round bar. The expansion part 223 may be formed with an inspection hole h1 penetrating the outer peripheral surface. The inspection member 551 may be disposed to penetrate the inspection hole h1. A portion of the inspection member 551 is located inside the expansion part 223, and the rest may protrude outside the expansion part 223.

The gap inspection unit 550 may inspect the flow path gap t by using a change in the protruding length of the inspection member 551 from the outside of the expansion part 223. For example, when dust is attached to the outer circumferential surface of the damper unit 510, the size of the flow path interval t may be reduced by the thickness of the dust. In this case, the protruding length of the inspecting member 551 may change as the inspecting member 551 does not directly contact the outer circumferential surface of the damper part 510 and contacts the dust attached to the outer circumferential surface. In detail, the protruding length of the inspection member 551 can be reduced.

When the damper portion 510 is the same height, the flow path spacing t when dust is not attached to the outer circumferential surface of the damper portion 510, and the flow path spacing when dust is attached to the outer circumferential surface of the damper portion 510 ( t) are different.

Similarly, when the damper portion 510 is the same height, the protrusion length of the inspection member 551 when dust is not attached to the outer circumferential surface of the damper portion 510, and dust is attached to the outer circumferential surface of the damper portion 510 In the case, the protruding lengths of the inspection members 551 are different.

As such, depending on whether or not the dust is attached, the size of the flow path spacing t changes at the same elevation and descending stroke X, that is, the height of the damper 510, and the inspection member 551 protrudes outwardly of the expansion part 223. The protruding length of is changed.

Therefore, in the normal state in which dust is not attached to the outer circumferential surface of the damper part 510, the protruding length of the inspection member 551 is measured in advance for each elevating stroke X. This is called the reference length.

Then, while operating the damper device 500, the protruding length of the inspection member 551 is inspected and compared with the reference length, and when the protruding length of the inspection member 551 is different from the reference length in the same lifting and descending stroke X, By adjusting the descending stroke X so that the protruding length of the inspection member 551 becomes a reference length, the flow path spacing t can be adjusted to a desired size. That is, the gap inspection unit 550 may inspect the flow path spacing t by using the change in the protruding length of the inspection member 551 from the outside of the duct portion 223.

The inspection member 551 is, for example, a bar or round bar-shaped inspection body 551a, a bracket 551b mounted to the front end of the inspection body 551a, and a projection 551c mounted to the rear end of the inspection body 551a. ). Here, the front is the direction toward the damper part 510, and the rear is the direction toward the outside of the expansion part 223.

The inspection body 551a may be disposed to penetrate the inspection hole h1. A roller member 555 may be supported on the bracket 551b. At this time, the inspection member 551 may contact the damper unit 510 through the roller member 555. Thus, during the height adjustment of the damper unit 510, it is possible to prevent damage to the outer peripheral surface of the damper unit 510.

An elastic member 556 may be fitted into the protrusion 551c. The elastic member 556 has one end supported by the projection 551c, and the other end supported by the rear end of the cylindrical member 554. The elastic member 556 may elastically support the inspection member 551. The inspection member 551 can maintain contact with the damper part 510 by the elastic member 556.

The guide member may include a first guide member 552 and a second guide member 553. The first guide member 552 may be installed to surround the outside of the inspection member 551 between the cylindrical member 554 and the outer circumferential surface of the expansion part 223. The first guide member 552 may include a guide body 552a and a flange 552b. The guide body 552a may be formed in a cylindrical shape. The guide body 552a may be centered in the inspection hole h1. The front end of the guide body 552a may be mounted on the outer peripheral surface of the expansion part 223. The flange 552b may be formed in a disc shape. The flange 552b can be mounted to the rear end of the guide body 552a.

The second guide member 553 may be a kind of case. The second guide member 553 may be formed of the same material as the material of the cylindrical member 554 described later. The second guide member 553 may have a disc shape and cover an opening formed at the front end of the cylindrical member 554. The second guide member 553 may be mounted on the rear surface of the flange 552b. At this time, the rear side means a side facing the rear side. A plurality of bolts 557a and nuts 557b may be mounted along the circumference of the edges of the second guide member 553 and the flange 552b to mount the second guide member 553 to the flange 552b. Of course, the method of mounting the second guide member 553 to the flange 552b may be various in addition to bolting.

A first guide hole h2 may be formed to penetrate the guide body 552a and the flange 552b in a direction crossing the gas flow direction. In addition, the second guide hole h3 may be formed to penetrate the center of the second guide member 553 in a direction crossing the gas flow direction. The inspection body 551a is disposed to penetrate the first guide hole h2 and the second guide hole h3, and is slidably supported on the inner circumferential surfaces of the first guide hole h2 and the second guide hole h3. Can be.

The cylindrical member 554 may be a hollow cylindrical member whose inside is opened forward. The cylindrical member 554 may be mounted on the rear side of the second guide member 553. The cylindrical member 554 may include a transparent material in at least a portion to facilitate inspecting the protruding length of the inspection member 551. That is, the cylindrical member 554 may be a sealed container made of a transparent material, or may have a cylindrical shape.

On the other hand, the cylindrical member 554 may have a plurality of scales (S) to check the flow path spacing using the protruding length of the inspection member 551. The plurality of scales S may each match one-to-one with the aforementioned reference length. The number of scales S may correspond to the number of reference lengths, that is, the number of stroke X sections.

For example, when the elevating stroke (X) of the operating unit 520 is about 600 mm when the flow path spacing t of the gas flow path is adjusted from the minimum size to the maximum size, the operating unit 520 is moved up and down in 100 mm increments. If desired, the number of scales S may be 7 corresponding to the section of the elevating stroke X. When the number of sections of the up-and-down stroke X increases, the number of scales S increases, and when the number of sections decreases, the number of scales S may decrease.

When dust is not attached to the damper portion 510, when the flow path spacing t of the gas flow path is minimum, the rear end of the inspection body 551a is in front of the cylindrical member 554 among the plurality of scales S The position of the scale S may be positioned to be located at the first scale close to the end. The reference length at this time is called the minimum reference length.

When dust is not attached to the damper portion 510, when the flow path spacing t of the gas flow path is maximum, the rear end of the inspection body 551a is in front of the cylindrical member 554 among the plurality of scales S The position of the scale S may be positioned to be positioned at the last scale farthest from the end. The reference length at this time is called the maximum reference length.

While operating the damper device 500, if the scale S at which the rear end of the inspection body 551a is located is checked, the reference length matching this can be known as the protruding length of the inspection member 551.

Further, when dust is attached to the damper part 510 at one position and the protruding length of the inspection member 551 changes, the position of the damper part 510 is adjusted to another position so that the protruding length becomes a desired length, and the flow path spacing ( t) can be adjusted at desired intervals.

7 is a partially enlarged view of a cylindrical member and a foreign material removing member of a gap inspection unit according to a modified example of the present invention.

Meanwhile, dust or residual water may be contained in the gas, and thus, various foreign matters d may be attached to the inner surface of the cylindrical member 554. Here, the foreign material (d) may be dust or condensate.

Accordingly, the gap inspection unit 550 according to the modified example of the present invention is installed to penetrate the cylindrical member 554, and further removes the member 558 for removing foreign matter d attached to the inner surface of the cylindrical member 554 It can contain.

The removal member 558 may include a ring member 558a, a pin member 558b, and a stopper 558c. The ring member 558a is formed in a ring shape, is disposed inside the cylindrical member 554, and can be in contact with the inner peripheral surface of the cylindrical member 554. The ring member 558a may be made of, for example, resin or rubber. The pin member 558b may extend in the extending direction of the cylindrical member 554, is installed to penetrate the rear end of the cylindrical member 554, and the ring member 558a may be supported at the front end. A stopper 558c may be mounted on the rear end of the pin member 558b. The stopper 558c can prevent the pin member 558b from excessively entering the inside of the cylindrical member 554 and falling off. The pin member 558b may be connected to a motor (not shown) or a hydraulic cylinder (not shown), for example, and may move the ring member 558a back and forth in the extending direction of the cylindrical member 554. The ring member 558a may contact the inner circumferential surface of the tubular member 554 and allow the foreign material d to drop off the inner circumferential surface.

Hereinafter, a gas processing method using the above-described gas processing facility and a damper device provided according to an embodiment of the present invention will be described.

Gas treatment method according to an embodiment of the present invention, the process of charging and processing the treatment equipment, the process of inhaling the gas generated in the treatment facility to the duct portion, duct using a gap adjusting unit installed to penetrate the duct portion And inspecting the flow path spacing between the damper portion and the duct portion disposed inside the portion, and adjusting the position of the damper portion using the flow path gap to control the flow rate of the gas flowing inside the duct portion. Here, the flow path spacing may be a flow path spacing of the gas flow path between the duct portion and the damper portion measured at the height at which the gap adjusting portion is installed.

First, the treatment is charged to the treatment facility. For example, the molten iron, scrap metal, and various auxiliary materials are charged to the converter 1, and the molten iron is refined with molten steel while blowing oxygen into the molten iron using the lance 11. During this process, gas is generated in the converter 1.

Subsequently, during the treatment by charging the treatment equipment, the gas generated in the treatment equipment is sucked into the duct unit 220. That is, by operating the manned ventilator 400, a negative pressure is formed inside the duct portion 220. Accordingly, gas may be sucked into the hood 100 connected to the duct 220. At this time, when air is introduced into the hood 100 together, combustion and explosion may occur inside the hood 100.

Therefore, by adjusting the position, for example, the height of the damper unit 510 disposed inside the duct unit 220, the flow rate of the gas flowing inside the duct unit 220 is adjusted, so that the inlet pressure of the hood 100 increases atmospheric pressure. Keep it. That is, the flow rate of the gas flowing inside the duct portion 220 is controlled by the damper portion 510 so that the gauge pressure at the inlet of the hood 100 is maintained at zero.

Specifically, by adjusting the height of the damper portion 510, the flow path spacing t of the gas flow path between the outer circumferential surface of the damper portion 510 and the inner circumferential surface of the expansion part 223 of the duct 220 is adjusted. At this time, the gauge pressure at the inlet of the hood 100 is measured using a pressure gauge (not shown) mounted on the hood 100. Here, the gauge pressure is a relative pressure based on atmospheric pressure.

If the gauge pressure is greater than 0, the height of the damper portion 510 is lowered by lowering the operation portion 520 to increase the flow path spacing t. When the gauge pressure becomes smaller than 0, the height of the damper unit 510 is increased by raising the operation unit 520 to reduce the flow path spacing t. Repeat this to keep the gauge pressure at zero.

At this time, when dust adheres to the outer circumferential surface of the damper unit 510, the flow path spacing t of the gas flow path is changed at the same position of the damper unit 510, so that the up/down stroke X of the operation unit 520, that is, the operation The height of the damper unit 510 cannot be accurately adjusted by adjusting the elevation height of the unit 520.

Therefore, before adjusting the position of the damper unit 510 to adjust the flow rate of the gas, the duct unit 220 and the damper unit 510 are installed using a gap adjusting unit 550 installed to penetrate the duct unit 223. Inspect the flow path spacing t between. Specifically, the gap adjusting portion 550 installed to penetrate the duct portion 220 is brought into contact with the damper portion 510, and between the expansion part 223 and the damper portion 510 using the gap adjusting portion 550 Inspect the flow path spacing (t). At this time, it can be confirmed that the protruding length of the inspection member 551 provided in the gap adjusting part 550 is different in that the flow path spacing t is changed at the same position of the damper part 510.

Then, the position of the damper unit 510 is adjusted by using the inspection result, and the flow rate of the gas flowing inside the duct unit 223 is accurately adjusted to a desired flow rate.

To this end, the inspection member 551 of the gap adjusting part 550 is brought into contact with the outer circumferential surface of the lower portion of the damper part 510, and the scale S provided on the tube member 554 is outside the expansion part 223. By using it, the change in the protruding length of the inspection member 551 is examined.

At this time, in the process of contacting the inspection member 551 and the damper part 510, the inspection member 551 is brought into contact with the damper part 510 through the roller member 555, and when the height of the damper part 510 is adjusted, the outer peripheral surface Damage can be prevented. In addition, the test member 551 is elastically supported using the elastic member 556 connected to the test member 551 to stably adhere the test member 551 to the outer circumferential surface of the damper part 510.

And in the process of inspecting the change in the protruding length of the inspection member 551, the inspection member 551 by using the scale (S) provided on the cylindrical member 554 of a transparent material installed to surround the inspection member 551 Examine the change in protrusion length. Specifically, by inspecting that the scale S indicated by the inspection member 551 changes at one position of the damper unit 510, the change in the flow path spacing t can be inspected.

Thereafter, the flow rate between the damper part 510 and the duct part 223 is adjusted. That is, if there is no change in the scale S indicated by the inspection member 551 at one position of the damper unit 510, that is, if the flow path spacing t maintains a desired interval, for example, a reference interval, the damper unit 510 Let's keep the job position.

In addition, when the scale S indicated by the inspection member 551 changes at one position of the damper part 510, that is, when the flow path spacing t changes, the damper part 510 is adjusted to another position to inspect the inspection member. Adjust the position of the scale (S) indicated by (551) and set the flow path spacing (t) as a reference interval.

Here, one position is the height of the damper unit 510 to maintain the internal pressure of the hood 100 at atmospheric pressure in a reference state in which dust (d) is not attached to the damper unit 510, for example, an operating unit ( It may be the height of the damper portion 510 at a predetermined position within the range of the rising and falling stroke X of 520. On the other hand, one position may vary depending on, for example, the amount of gas generated and the size of the gas treatment facility.

In addition, the reference interval may be a flow path interval when the damper unit 510 is positioned at one position described above in a reference state in which no dust d is attached to the damper unit 510.

In addition, the other position may be a new height of the damper part 510 that allows the internal pressure of the hood 100 to be maintained at atmospheric pressure in a state in which dust d is attached to the damper part 510. That is, the other position may be a new height of the damper part 510 capable of restoring the flow path spacing of the gas flow path at a reference interval while the dust d is attached to the damper portion 510.

As described above, according to an embodiment of the present invention, it is possible to accurately check in real time the flow path spacing t of the gas flow path between the outer circumferential surface of the damper portion 510 and the inner circumferential surface of the expansion part 223. Therefore, even when dust is attached to the outer circumferential surface of the damper unit 510, the height of the operation unit 520 may be further increased or lowered to accurately adjust the flow path spacing t, and thus, the entrance of the hood 100 The pressure can be adjusted to atmospheric pressure.

Accordingly, gas is sucked from the treatment facility and sucked into the hood 100 to prevent external air from flowing into the hood 100, thereby preventing gas explosion and combustion. From this, the gas can be stably sucked from the treatment facility to the hood 100 and the duct portion 220, and the gas generated in the treatment facility can be stably recovered. The gas recovered by the duct 220 may be stored in the gas holder 700 or exhausted to the stack 800. Subsequently, when the treatment of the treatment is finished in the treatment facility, the operation of the gas treatment facility and the damper device 500 ends.

The above embodiments of the present invention are for the purpose of describing the present invention and not for the limitation of the present invention. It should be noted that the configurations and methods disclosed in the above embodiments of the present invention may be modified in various forms by combining or crossing each other, and such modified examples may be viewed as the scope of the present invention. That is, the present invention will be implemented in a variety of different forms within the scope of the claims and equivalent technical spirit, and various embodiments are possible within the scope of the technical spirit of the present invention. Will be able to understand.

100: hood 220: duct
222: reduction portion 223: expansion portion
300: dust collector 400: manned ventilator
500: damper device 510: damper unit
520: operation unit 550: gap inspection unit
551: absence of inspection 554: absence of cylinder
700: gas holder 800: stack

Claims (15)

As a damper device for adjusting the flow rate of the gas flowing inside the duct,
A damper part disposed inside the duct part;
An operating unit connected to the damper unit and adjusting a position of the damper unit;
Damper device comprising a; is installed to penetrate the duct portion, the gap inspection unit for inspecting the flow path gap between the duct portion and the damper portion. The method according to claim 1,
The duct portion includes a shrinking part in which the cross-sectional area gradually decreases in the gas flow direction and an expansion part in which the cross-sectional area gradually increases,
The damper portion has a shape in which a cross-sectional area increases in a gas flow direction, and a lower portion having a large cross-sectional area is disposed in the expansion part, forms a flow path between the expansion parts, and adjusts a position to change the flow path spacing,
The gap inspection unit is installed in the expansion part in a direction crossing the flow direction of the gas, the damper device in contact with the lower portion of the damper. The method according to claim 1,
The gap inspection unit is provided with a plurality, the damper device is arranged along the circumference of the expansion part, radially installed. The method according to claim 1,
The gap inspection unit is a damper device having an inspection member and a cylindrical member so as to inspect the gap between the flow paths using contact with the damper unit. The method according to claim 4,
The inspection member extends in a direction crossing the flow direction of the gas, and is installed to protrude to the outside of the duct portion while contacting the damper portion,
A damper device that can inspect the flow path spacing by using a change in the protruding length of the inspection member from the outside of the duct portion. The method according to claim 5,
The gap inspection unit,
Further comprising; a roller member disposed inside the duct portion and supported at an end of the inspection member,
The inspection member is a damper device in contact with the damper through the roller member. The method according to claim 5,
The tubular member is installed to surround the protruding portion of the inspection member from the outside of the duct portion, the damper device comprising a transparent material. The method according to claim 7,
The tubular member is a damper device having a plurality of scales so as to inspect the flow path spacing using the protruding length of the inspection member. The method according to claim 7,
The gap inspection unit,
An elastic member disposed inside the cylindrical member and elastically supporting the inspection member;
A damper device further comprising a guide member surrounding the outside of the inspection member between the tubular member and the duct portion. The method according to claim 7,
The gap inspection unit,
A damper device further comprising a removal member installed to penetrate the tube member and removing a foreign material attached to the inner surface of the tube member. A process of charging and processing a treatment object in a treatment facility;
A process of sucking gas generated in the treatment facility into a duct;
Checking a flow path gap between the damper portion and the duct portion disposed inside the duct portion using a gap adjusting portion installed to penetrate the duct portion;
And adjusting the flow rate of the gas flowing inside the duct portion by adjusting the position of the damper portion using the flow path gap. The method according to claim 11,
The process of adjusting the flow rate,
A process of maintaining a position of the damper part when the flow path spacing at a position of the damper part maintains a reference distance;
And a process of adjusting the position of the damper part to another position to set the flow path interval as a reference interval when the flow path interval changes at one position of the damper part. The method according to claim 11,
The process of checking the flow path gap,
Contacting the inspection member of the gap adjusting part with the damper part;
And inspecting a change in protrusion length of the inspection member from the outside of the duct. The method according to claim 13,
In the process of contacting the inspection member and the damper,
The inspection member is brought into contact with the damper part through a roller member supported at an end of the inspection member inside the duct part,
A gas treatment method for elastically supporting the inspection member by using an elastic member connected to the inspection member. The method according to claim 13,
In the process of examining the change in the protrusion length,
Gas processing method for inspecting the change in the protruding length of the inspection member by using a scale provided on a cylindrical member of a transparent material installed to surround the inspection member from the outside of the duct.

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