KR20170071118A

KR20170071118A - Spray cooled duct for dust collection

Info

Publication number: KR20170071118A
Application number: KR1020150179081A
Authority: KR
Inventors: 강성진; 박종진; 구자춘
Original assignee: 주식회사 엠텍이엔지
Priority date: 2015-12-15
Filing date: 2015-12-15
Publication date: 2017-06-23

Abstract

A spray duct which is connected to a plurality of ends by a nozzle and is detachable by a cam lock, and a water pipe connected to the water supply pipe through which the cooling water is introduced, A header pipe for distributing cooling water, and a hatch door having a leakage preventing function, wherein the hatch door has a structure in which the frame diaphragm and the door diaphragm correspond to each other so that the injected cooling water does not leak outside. do.

Description

[0001] SPRAY COOLED DUCT FOR DUST COLLECTION [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dust collecting duct of a spray cooling type, and relates to a hatch door of a dust collecting duct which becomes a passage of hot gas generated in an electric furnace.

It is the main process of the electric furnace to dissolve the iron scrap by generating the arc heat by passing electric current to the electrode at the steelworks. The molten scrap is oxidized and refined by blowing high-pressure oxygen, and after slag elimination, the electric furnace is tilted and leached through the ladle of the floor.

In this process, high-temperature waste gas and dust are generated due to reaction with oxygen blown into the electric furnace. In order to quickly remove such high-temperature gas, a separate dust collecting facility is separately installed outside the factory, Ducting facilities are installed to serve as gas passageways.

The hot gas generated in the electric furnace while the electric furnace roof covers the upper part of the electric furnace during the operation is discharged through the dust collecting hole of the electric furnace loupe to the elbow, the sliding duct, the combustion chamber front duct, the combustion chamber, the rear duct of the combustion chamber, .

In this case, the injection cooling method is applied to the electric furnace loops, elbows, sliding ducts, combustion chamber front ducts, combustion chamber loops, and combustion chamber rear ducts to withstand high temperature heat. The injection cooling system is divided into a plurality of sections of the moving passages of the high-temperature gas and is connected to each other. A plurality of nozzles are arranged in a tightly closed space on the opposite side of the inner steel plate contacting with the hot gas, And thus it is in a trend of being used more and more because of its excellent safety and convenience of operation.

The cooling water injected from the nozzle flows down the spray surface, is collected at the lower part of the sprayed airtight space, and is discharged through the drainage pipe.

In order to check the spraying condition of the nozzles and to facilitate the repair of the inner iron plate, a plurality of hatch doors are installed outside the hatch door frame and the door so that the hatch door is rotated 90 degrees However, in the case of a dust duct installed horizontally or inclinedly, the hatch door can not be installed in the case of the dust collecting duct installed in the vertical cylindrical shape. However, It is impossible to install the hatch door because the jetted cooling water falls down to the side of the hatch door due to the leakage of water from the lower side of the duct to be installed at an angle of more than 90 degrees. Therefore, maintenance of the nozzle, Difficulties in operation occur.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and it is an object of the present invention to enable a hatch door to be installed between the front and rear of a dust collecting duct, thereby facilitating checking of the spraying state of the nozzle and repairing of the inner steel plate.

In order to accomplish the above object, the dust-collecting duct of the present invention includes a dust-collecting duct main body 110 having a cylindrical inner space serving as a moving path for hot gas generated in an electric furnace and coupled to each other; An injection hermetically sealed space 113 formed between the inner steel plate 111 and the outer steel plate 112 of the dust-collecting duct main body 110 of the spray cooling type; A plurality of hatch doors (120) having a structure capable of opening and closing so as to be able to approach the injection hermetic space (113) from the outside; A header pipe 114 connected to the water supply pipe 118 in the injection hermetic space 113 and installed in a ring shape; A spray tube 117 capable of being detached and attached by the header pipe 114 and cam lock 115 and having a plurality of nozzles 116 at its ends; And a drain pipe 119 through which the cooling water injected from the plurality of nozzles 116 toward the inner steel plate flows down and is discharged.

The plurality of hatch doors 120 are installed in the outer steel plate 112 so as to be accessible to all the areas of the hermetically sealed space 113. The cooling water injected from the nozzles 116 is dropped toward the hatch door 120 It is desirable to have a function of preventing the outer steel plate 112 from leaking outside.

Further, the hatch door 120 includes a door 130 including a plurality of door partition plates 131 installed left and right and an upper door partition 133 installed on the upper portion to prevent leakage to the outside. A plurality of frame diaphragms 141 overlapping to correspond to the plurality of door diaphragms 131 and a frame lower diagonal steel plate 142 having an inclination such that the cooling water flows without delay and a frame provided parallel to the door 130. [ A lower iron plate 149, and a hatch door frame 140 including an in-frame vertical steel plate 144.

In the dust-collecting duct main body installed in a horizontal or inclined form not installed vertically, the cooling water injected and discharged in the sprayed confined space leaks to the gap between the hatch door gaps, The hatch door can not be installed, which makes it difficult to check the spraying state of the nozzle and repair the inner plate.

In order to overcome this disadvantage, the present invention provides a hatch door having a leak-barrier function, which has a diaphragm structure interposed in multiple so that leakage does not occur through a gap between the door and the hatch door frame even if the cooling water dropped or flows toward the hatch door So that it is possible to easily perform operations such as checking the spraying state of the nozzles and repairing the dust-collecting ducts of the spray-cooling type.

1 is a perspective view showing an entire dust-collecting duct according to an embodiment of the present invention.
2 is a cross-sectional view and a cross-sectional perspective view showing a dust-collecting duct of a spray cooling type installed in a vertical cylindrical shape.
3 is a cross-sectional view illustrating a dust-collecting duct of a spray cooling type installed in a horizontal cylindrical shape.
4 is a perspective view and a partial cross-sectional perspective view showing a dust-collecting duct of a spray cooling type installed in a horizontal cylindrical shape before and after installation of a hatch door to prevent leakage of water.
Fig. 5 is a perspective view showing a dust-collecting duct of a spray cooling system partially not provided with a hatch door.
6 is a simplified perspective view showing only the hatch door.
7 is a top, bottom, left and right cross-sectional perspective view of the hatch door.
8 is a perspective view showing a door of a hatch door and a door frame.
9 is a sectional view showing a method for opening and closing the hatch door.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1, the high-temperature gas and dust generated in the electric furnace 150 are collected and discharged through an injection cooling type elbow 152 located at one side of the electric furnace loops 151 of the spray cooling type. At this time, the high-temperature dust collected through the gap between the sliding duct 153 of the spray cooling type and the elbow 152 of the spray cooling type is introduced into the combustion chamber 155 through the combustion chamber front-end duct 154, And the secondary combustion process is performed. The upper part of the combustion chamber 155 is filled with the combustion chamber loops 156 of the injection cooling type and the secondary combustion high temperature gas is sent to the dust collecting facility separately provided through the combustion chamber rear stage duct 157 .

In this case, all of the apparatuses to which the spray cooling method is applied have a cylindrical inner steel plate 111 which is in contact with the hot gas as shown in FIGS. 2, 3 and 4, and the inner steel plate 111 and the outer The sprayed hermetically sealed space 113 is provided between the steel plates 112 to protect the facility by spraying the cooling water by disposing a plurality of nozzles 116 with no space toward the outer surface of the inner steel plate 111.

3 and 4, a water supply pipe 118 connected to an external pipe is connected to a header pipe 114 installed in a ring shape in the sprayed hermetically sealed space 113 in order to inject cooling water into the sprayed hermetically sealed space 113 And a plurality of spray tubes 117 are provided at predetermined intervals to be detachably attached to the header pipes 114 by the cam lock 115 to receive the cooling water and to spray the branch tubes 117 with the nozzles 116 Structure.

2, in the dust-collecting duct main body 110 of the spray cooling type installed in a vertical cylindrical shape, the sprayed cooling water flows down on the outer surface of the inner steel plate 111 and cooling water is supplied to the inner surface of the outer steel plate 112 So that the hatch doors 120 can be installed in all sections of the outer steel plate 112.

As shown in FIG. 9, the operator grips the handle 135 to lift the door 130 and then lower the door 130 so that the lower portion of the door 130 protrudes out of the hatch door frame 140, So that the hatch door frame 140 is separated from the hatch door frame 140.

At this time, a gap exists between the door 130 and the hatch door frame 140 to facilitate opening and closing. When the cooling water is injected or flows toward the hatch door 120, the dust- 110). &Lt; / RTI >

3, the cooling water injected toward the outer surface of the inner steel plate 111 is not in contact with the cooling water injected from the hatch door 120 installed at an angle of 90 degrees or less, The cooling water is directed toward the hatch door 120 to cause leakage of water between the door 130 and the gap of the hatch door frame 140.

As shown in FIG. 5, the dust-collecting duct main body 110 of the spray cooling type can be installed in a vertical cylindrical shape in a part of the combustion chamber rear-end duct 157 of the spray cooling type, but it is installed in a horizontal or inclined form In the case of the dust-collecting duct main body 110 of the spray cooling type, there exists a section of the slant outer iron plate 158 through which the sprayed cooling water flows down. In this portion, the hatch door 120 can not be installed due to leakage.

The inclined outer steel plate 158, which can not be installed with the hatch door, is difficult to access the sprayed closed space 113, so that the clogging of the nozzle 116, confirmation of the spray pattern, and repair of the inner steel plate 111 Maintenance work becomes difficult.

In the present invention, as shown in FIG. 4, the inclined outer steel plate 158, through which the injected cooling water can not be installed in the conventional jet cooling type main body 110 of the jetting duct, can be prevented from leaking, (120) can be additionally installed to facilitate maintenance work in all sections.

As shown in FIG. 6, the operator can open the door 130 and easily access the inner steel plate 111 that he / she can not access. The hatch doors 120 between the outer steel plate 112 and the inner steel plate 111 are provided with a gap of 300 mm or less in most of the sprayed hermetically sealed spaces 113, Convenience.

7 and 8 show details of the hatch door 120 in which leakage of water is prevented. The hatch door 120 is composed of a door 130 which can be opened and closed and a hatch door frame 140 for fixing the door. The door 130 has a handle 135 on the outside of the door panel 134 and has a door upper diaphragm 133 horizontally on the inside and two door diaphragms 131 vertically on both sides and a door diaphragm 131 inside the door diaphragm 131 The hatch door frame 140 is composed of a frame top iron plate 145, a frame side iron plate 146 and a frame lower sloping iron plate 142 so as to form an outer iron plate 112, And the lower frame inclined steel plate 142 has an inclined angle such that the cooling water is not retarded. In order to prevent the cooling water from leaking out, the frame lower steel plate 149, the frame upper inner plate 147, and the upper frame outer plate 143 are provided on the upper and lower sides to restrain the door 130 to be fixed It also plays a role.

The frame diaphragm 141 is vertically disposed in the hatch door frame 140 so as to correspond to the door inner diaphragm 132 and the door diaphragm 131 so that the inner vertical steel plate 144 is added inside the frame diaphragm 141, Thereby making it impossible to reach the gap between the door 130 and the hatch door frame 140.

At this time, it is preferable that the inner vertical steel plate 144 is attached with a slightly shortened bottom so that some cooling water can pass through.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken in conjunction with the scope of the present invention. It will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the scope of the appended claims.

100: a dust collecting duct of an injection cooling type; 110: a dust collecting duct main body of a spray cooling type;
120: Hatch door 130: Door
140: Hatch door frame 150: Electric furnace
151: Spray cooling type electric furnace Loop 152: Spray cooling type Albo
153: Sliding duct of injection cooling system 154: Combustion chamber front-end duct of injection cooling system
155: combustion chamber 156: combustion chamber type combustion chamber loop
157: Duct duct after injection cooling system

Claims

A dust-collecting duct main body 110 of a spray cooling type having a cylindrical inner space serving as a moving path of the hot gas generated in the electric furnace 150;
An injection hermetically sealed space 113 formed between the inner steel plate 111 and the outer steel plate 112 of the dust-collecting duct main body 110 of the spray cooling type;
A plurality of hatch doors 120 having a structure capable of being opened and closed so as to be able to approach the injection hermetic space 113 from the outside;
A header pipe 114 connected to the water supply pipe 118 in the injection hermetic space 113 and installed in a ring shape;
A spray tube 117 capable of being detached and attached by the header pipe 114 and cam lock 115 and having a plurality of nozzles 116 at its ends;
And a drain pipe (119) through which the cooling water injected from the plurality of nozzles (116) toward the inner steel plate (111) is collected and discharged.

A plurality of hatch doors 120 are installed in the outer steel plate 112 so as to be accessible to all areas of the hermetically sealed space 113 and the cooling water injected from the nozzles 116 is supplied to the hatch doors 120. [ So as not to leak outside the outer steel plate (112).

The hatch door according to claim 2, wherein the hatch door (120) includes a door (130) including a plurality of door partition plates (131) installed left and right and a door upper partition plate )Wow;
A plurality of frame diaphragms 141 overlapping to correspond to the plurality of door diaphragms 131 and a frame bottom plate 142 having a slope to allow the cooling water to flow without delay and a frame bottom And a hatch door frame (140) including an inclined steel plate (149) and a vertical steel plate (144) inside the frame.