DE2027860A1 - - Google Patents

Description

DW.-IN ·. OIPl -.- INO. M. »C. OIPL..PMV8. DR. DII "L.-PHY". HÖGER - LEGAL RIGHTS - GRIESSBACH - HAEGKER PATENT LAWYERS IN STUTTGART

A 38 203 h

h-24

June 6, 1970

O.S. Ser.lTo. 833,560

National Oust Collector Corporation, Skokie, Illinois, -U.S.A.

Valve

The invention relates to a valve for controlling a through at least one line of flowing gas stream with a Housing that has a central passage and carries a valve member consisting of a valve located parallel to the axis of the housing Open position can be pivoted into a closed position perpendicular to the housing axis ".

The invention is based on the object of creating a valve construction with the aid of which a gas-tight seal one line is certain to take place. This object is achieved with the valve according to the invention mentioned in the opening paragraph solved in that the housing axis is vertical and the valve member on its periphery after a closed position has a circumferential channel open at the top for receiving liquid, into which an immersion ring protrudes in the closed position, which is attached to the inner surface of the housing and directed as a whole inwards and downwards. ■

The swivel valve according to the invention is simple in design, easy to operate and relatively cheap in the Manufacturing. - 2 -

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The pivot valve according to the invention can now be pivoted back and forth between two working positions, so as to be deviating to seal one line of a pair of lines from a common outlet line.

The swivel valve according to the invention is particularly advantageous for gas-tight valve constructions on large lines, such as are commonly used to connect a pair of cupolas to a single washer. at Such fixtures usually have one furnace in operation while the other furnace is shut down for repairs. The pipe system and the valve arrangement result in a .Gown, to add the exhaust gases from the working furnace to the scrubbers lead without a reflux should take place in the shutdown furnace. Those produced in the working furnace Top gases are at an extremely high temperature, and it is It is now desirable that a positive gas seal be maintained between the chimneys of the inactive and inoperative furnace so that workers who move in and around the closed furnace, do not run the risk of being burned or of your health damage the leakage flow of hot gases from the operating furnace To suffer.

In particular, the invention according to an embodiment a gas-tight, liquid-sealed swing valve construction for controlling gas flow through a conduit is provided, the valve device having a housing with side walls and at the upper and lower ends is open for connection to the pipe system. A heavy valve element is pivotable about a horizontal pivot axis in the vicinity of one end of the housing and can so be pivoted from a substantially horizontally closed position to an open position in which the valve

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June 6, 1970

is outside of the gas flow passing through the housing flows through. Furthermore, an annular trough is provided on the top of the valve member in which a certain amount a liquid, usually water, can be stored in order to create a circumferential seal between the outer circumference to create the valve member in the closed position and the walls of the housing. An annular flange is also provided, which is in direct contact with the bottom of the liquid trough with the liquid extending into it, thereby creating a gas-tight liquid seal between the closed Valve member and the housing walls is created.

According to a further feature of the invention, a swing valve of this type has been provided to allow the flow of gas through control a duct, particularly for use with the exhaust ducting system between a pair of ovens or others gas generating devices can be used in which one furnace operates during a certain period while the other switched off and inactive. ·

Further features of the invention emerge from the following description in connection with the drawing, which shows an exemplary embodiment of the invention. In the drawing show:

Fig. 1 is a front view of a typical Kupolofeneinrichtung with a pair of the cupola furnace, which are disposed adjacent a single scrubber, wherein a pair of inventive pivotal valves for controlling the gas flow are provided between the cupola furnace and the gas scrubber,

FIG. 2 shows a longitudinal section through a swivel valve according to the invention on a larger scale than FIG. 1,

Fig. 3 shows a longitudinal section through a further embodiment of a swivel valve according to the invention.

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June 6, 1970 --4 <-

In Fig. 1, a typical cupola furnace is shown which comprises a pair of cupolas 12 and 14 arranged side by side and closely adjacent to a single scrubber 66. The two furnaces have a lower part 16 in which the refined, molten metal sai: r-elt in a collecting space which is then finally tapped, so that the molten metal now goes out through a channel 18 into a pan 20 can flow, which is movable on rails 22. The ovens each have an upright shaft 24 with Iron ore, lime and coke is charged. The metal is then refined in the heat and accumulates in base 16. The individual shafts also have a charging opening 28 above a charging level 26 in order to facilitate the introduction of the batches of limestone and coke into the shaft.

A shower chamber 30 is provided at the upper end of the shafts, as described and illustrated, for example, in U.S. Patent 3,432,153. The single ones Shower chambers 30 contain an inner conical baffle member 32, a cylindrical jacket 34 adjoins its lower edge. The impact member is coaxial with the vertical axis of the Shaft and arranged at a distance above the upper end of this shaft. Now water is poured over the effervescent grains a main supply line 36 and a pair of branch lines 38 supplied, in each of which a control valve 40 is provided. The shower water is the conical baffle members 32 is fed via nozzles 42 and then flows downwards over the baffles and around the jacket 34, so that essentially a cylindrical curtain of running water between the lower end of the jacket and the upper end of the well results. The hot gases generated in the shaft flow out through this curtain of water and are in the process through it Water is cooled, and in addition, a large part of the

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impurities of the gas accumulated in the water. The cooled down Gas is then discharged directly from the top of the shower chamber 30 through the chimneys 44. Preferably will instead to release the gas directly into the atmosphere, that gas through an upper valve member 48 into a downward one Elbow 46 derived, which is attached to the jacket of the shower chamber. The valve member 48 is held on a cable 50, so that it is now between a lower, open position (see the left shower chamber according to. Pig. 1) and an upper, closed position (see the right shower chamber) can be moved back and forth. The movement of the cable for lifting or lowering the valve members 48 is done by a device such as a power operated winch 52. If now one of the ovens is switched off or otherwise comes out of action, the valve member 48 in the shower chamber is on The upper end of the furnace shaft is usually lowered into the open position to allow a free flow of air through the furnace shaft to enter and thus to cool the furnace shaft. The valve member 48 in the operating furnace can be closed or opened, depending on whether the gases are dem Gas scrubbers 66 are supplied or not.

By means of the baffle member 32 and the jacket 34 in the individual shower chambers 30 formed water curtain some of the impurities in the gas are removed. That dirty Water then collects in an annular collecting trough 54 at the bottom of the shower chambers near the upper one End of the associated furnace shaft. The individual Saramel channels 54 have a sloping bottom wall and a drainage line 56 at the lowest point of the floor. There is also a float operated control valve 58 is provided on the drain lines so as to minimize liquid level in the collecting trough to achieve sealing of the jacket 34 when the

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A 38 203 h
h - 24 fl
June 6, 1970

Impact member is lowered to close the associated shaft. The upper liquid level in the collecting troughs is controlled by an overflow line 60. Lines 56 and 60 are connected to a common connecting line 62, UTid a drain line 64 leads the accumulated dirty water to a dirt treatment facility or a Sewer too, both of which, however, are not shown.

As described in the aforementioned United States patent and shown, requires lining the shaft when one of the cupolas 12 or 14 is shut down or out of service is usually an interior surface repair and maintenance. After the shaft is enough Has cooled down, workers usually enter the shaft through the charging opening 28 in order to carry out the necessary repairs there. During this time, the valve member remains 48 at the top of the shower chamber 30 of the out of order Oven open in order to achieve a good draft and air circulation in the shaft.

In addition to dirt accumulation during spraying, what takes place inside the active shower chamber 30 when the top gases flow through the water curtain, Further purification of the gases may be required to comply with air pollution regulations. A single scrubber 66 is often used in conjunction with a pair of cupolas to remove contaminants to remove that are still in the gas after spraying in the shower chamber 30. When the upper valve member 48 is closed, the sprayed gas flows outwardly out of the shower chamber and through the elbow 46 down into one side of a whole with 68 related

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neten, downward piping system. The lower end this system has a piece of pipe 70 to the sprayed, to introduce hot gases from the furnace in operation into the gas scrubber 66, which is preferably a NaS scrubber, as described, for example, in U.S. Patent 3,334-8,825 and is shown. If only one of the ovens is in operation for a certain period of time, is only a single gas scrubber 66 is provided, with which the shower chamber 30 of one or the other is in operation Cupola 12 or H is connected. Like in Pig. 1, the furnace H is in operation and the furnace 12 is in operation is switched off so that repairs can be carried out. In this It is usually important that none of the hot gases generated in the operating furnace enter the shaft of the switched off furnace, in which workers can be present. Contain the blast furnace gases generated by cupola usually large amounts of carbon monoxide and others Gaset harmful to humans? and therefore there must be means be provided in the line system 68 in order to create a gas-tight seal between the one connected to the operating furnace Side of the system and the opposite 'side of the system to create the one in the shaft of the shutdown Worker working to secure furnace during a repair.

The line system 68 has a V-shaped manifold 72, the is connected to the upper end of the pipe section 70, which in turn is connected to the gas scrubber. The opposite and branch pipe sections 72a and 72b extending upward at an angle are provided with an intermediate pipe section 74 and an elbow 76 connected. The upper ends of the manifold 76 are connected to the lower end of a gas-tight, liquid-sealed swing valve 80 according to the Srfin-

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6.6.1970 - connected, creating a gas-tight seal between the working and the non-working furnace. The upper end of each swing valve 80 communicates with the downwardly directed elbow 46 via a further intermediate pipe section 82. Either a or both shower chambers 30 of the ovens in question are connected to the gas scrubber 66 by the line system 68.

When the right oven 14 is in operation and the upper valve member 48 of the associated shower chamber 30 is closed, the hot top gases generated in the oven flow from the Oven shaft to the outside through the water curtain flowing downwards in the shower chamber. The sprayed gas then flows out of the shower chamber and down into the right one Side of the line system 68 via the right elbow 46, the intermediate pipe section 82 and the open right swivel valve 80. The right swing valve 80 Bt shown in the open position and the left swivel valve in its closed or gas-tight sealed position, so that the gases are now not can flow upward through the left branch pipe piece 72a of the distributor 72 into the furnace 12. Because those produced in the ovens Gases can be extremely harmful to health, it is important that the gases coming from the working cupola furnace in an effective manner against entry sealed in the shaft of the switched-off furnace, in which workers can be located.

The swing valve of the invention 80 is now in a position, the gas flow would be through the conduit system to prevent or permit, which leads to the valve housing towards or away from the valve housing away and thus between the respective spray chambers 30 and flowing the gas scrubber 66th In Pig. 2 is the swivel valve 80 according to the invention in one

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individually shown. This is essentially rectangular Housing 84 with a pair of parallel, opposed Side walls 86 and a second pair of side walls 88 and 90 which are perpendicular thereto. The side walls thus result in a substantially rectangular flow cross-section through the housing. The side wall 90 has a larger rectangular opening 90a in communication with a box-like, essentially cuboid, lateral Secondary housing 92 in which a pivotable valve member is housed when this valve member is in its vertical position open position.

The life housing 92 has a horizontal bottom wall 94, a lower, vertical side wall part 96, an upper, vertical, Cup-like side wall part 98 and a horizontal top wall 102, the extension of which with the upper flange of the side wall part 98 is connected. The lower face of the side wall part is with an elbow 104 on the upper edge of the vertical side wall part 96 connected. The end walls of the secondary housing 92 are formed by right-angled, outwardly extending projections 86a, which nit in one piece are the side walls 86 of the main housing. The side wall part 98 can easily be removed from the position shown in order to create access to the interior of the secondary housing 92. For this purpose it has splash 98a on the opposite ends attached to the housing side walls with a plurality of screws 106.

On the upper end pieces of the secondary chamber 92 are the sides * - wall extensions 86a through rectangular stiffening plate η covered, on which a pair of plan impactors 124 are attached, in which the opposite ends of a horizontal pivot shaft 122 are mounted

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June 6, 1970

right-angled valve member (in the horizontal closed or sealed position drawn in Pig, 2 shown) pivotable arranged on the pivot shaft 122 and can move between the closed, horizontal position and an open, Move back and forth in the vertical position shown in dashed lines, in which the valve member is in that of the secondary housing 92 enclosed space is in which the valve member is set off laterally from the normal flow path of the gases, which move longitudinally in the housing 84 between the upper and lower end faces.

To now rotate the pivot shaft 122 and so the valve member 120 between the open and the closed position and to move it, a pressure medium unit 108 is provided, the lower end of which can be pivoted with a bearing arm 110 which is arranged on a platform extension 112 extending horizontally outwardly from the side wall 90 of the housing at the lower end thereof. The top The piston rod end of the pressure medium unit 108 is pivotably connected to a lever 114 which is at the outer end of the pivot shaft 122 is attached. When a print medium is in the top end of the unit is introduced.; In order to retract the piston rod into the cylinder unit, the valve member 120 pivoted clockwise to the closed or sealed position (this is shown in solid lines), and when the Pressure medium is introduced into the opposite lower end of the cylinder assembly, so the piston rod will follow moved outside, so that now the valve member in the counterclockwise direction in the downward, vertical or open position is pivoted (this process is shown in dashed and dotted lines) »

A 38 203 h
h - 24fl
June 6, 1970

According to the invention, the valve member 120 is sealed gas-tight with respect to the gas flow which flows through the housing 84, when the valve member is in the horizontal or closed position. The valve member has a pair of im Distance parallel outer side legs 126, which at their ends on the right in FIG. 2 are firmly connected to the pivot shaft 122 and to one another by means of transverse limbs 128 which are perpendicular thereto and parallel to the pivot shaft 122. Legs 126 and 128 are preferably parts of Elbows and form a substantially rectangular outer frame for the valve member. With the inner edges of the Leg 126, 128 of the frame is a right-angled by pairs of vertical, strip-like inner legs 132, 134 Middle plate 130 connected. These vertical inner legs 132, 134 and the outer legs 126, 128 form an uninterrupted, having a U-shaped cross-section, upwardly open channel 136, which is arranged on the outer circumference of the valve member is and is used to take up liquid in order to achieve a gas-tight seal of the closed valve member achieve. The downwardly directed immersion ring, which is designated as a whole by 140, is on the inside of the Housing walls 86, 88 and 90 attached and results in ' act with the liquid in the channel 136 to create an uninterrupted seal on the inside of the housing. The immersion ring has a plurality of ring members 142 which extend downwardly and inwardly relative to the associated walls of the housing 84 are directed, and further a plurality of vertical ring parts 144, which with the lower edges of the inclined ring parts 142 are connected. The lower edges of the vertical ring members 144 extend downward into the liquid inside, which is arranged in the channel 136 on the circumference of the valve member 120, so as to form a gas-tight liquid seal produce when the valve member is closed. the

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A 38 203 h
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June 6, 1970

Sealing liquid, preferably water, is poured into the housing 84 and the channel 136 via an insertion piece 146 and a supply line 148, the latter only being schematic is shown. The insertion piece 146 enters the Housing at your place above the inclined ring parts, so that the sealing liquid downwards and inwards flows through the immersion ring 140 to collect in the channel 136. The flow rate of the sealing liquid, to .hold the channel 136 in the filled state depends on the evaporation rate. When extremely hot gases are present, the evaporation can be so high that a constant supply of water is necessary. Once the Channel is filled, so excess liquid runs over the vertical legs of the outer legs 126 and 128, and generally down through housing 84 and then received by scrubber 66.

When the valve member 120 from the sealed, closed horizontal position to the vertical open position (which is shown in phantom) is pivoted, so takes the valve member a position in the secondary housing 92 and is thus outside the path of the main gas flow, the flows perpendicularly through the housing 84. The swivel valve results in a gas-tight design that is suitable for large lines and gas ducts is suitable. The swing valve is simple in construction, easy to operate and in good working order to keep and safely prevents gas leakage which could otherwise endanger the workers who are in the shaft of the neighboring, disused cupola furnace or in the vicinity of its shaft.

In Fig. 3 is a modified embodiment of a gas-tight, double acting liquid sealed

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June 6, 1970

Swivel valve 180 shown in which a double-acting Swivel valve member 220 is used, which consists of a first horizontal position (shown in solid lines on the left), in which separates the gas flow from the left intermediate pipe section 82 is, in a second horizontal position (shown in dash-dotted lines) is pivotable, in which the from the right intermediate pipe section 82 incoming gas stream is separated. When this double-acting swing valve 180 is used in conjunction with a typical 1 is used, its valve housing 184 serves the same purpose as the V-shaped manifold 72 in the line system 68 according to i "ig. 1, so that the intere The end of the valve housing 184 can now be connected to the pipe section 70 of the gas scrubber by means of an intermediate piece 172.

The housing 184 of the swing valve 180 has pairs of parallel, opposite side walls 186 and 188, and that Pivot valve member 220 is disposed on a central pivot shaft 222 which extends across the housing between the opposite side walls 186 at their upper ends in extends through the center of the housing.

The swivel valve member 220 has a cuboid-shaped middle Box on, which is formed from spaced, rectangular plates 230, which on its outer periphery are connected by strip-like legs 232 and 234. These legs form the inner wall of a pair of with the Bottom opposing, opposite grooves 236 and 336, which are completed by angle pieces 226 and 228, that lie against each other with your thighs. If that Swivel valve member 220 in the left position according to Pig. 3 is eo the channel 236 is directed upwards and cooperates a'Mhtäuchring 240, which is around the left, upper Opening around the housing. The liquid for the

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June 6, 1970

In this position, the seal is made via an insertion piece 246 and a supply line 248 supplied.

The inner elbows 228 of the valve member frame are with the Schwenjiwe ^ le 222 through a multitude of arms 235 so connected that the pivot valve member free from the left horizontal position in the opposite side of the housing (see the dash-dotted lines) can be pivoted, in which the right upper opening is sealed.

In the right horizontal position, the channel 336 is upwards directed and interacts there with the dew ring 240, which surrounds the upper right opening of the housing.

Eb results so that the pivot valve 180 is a single, double-acting swivel valve member 220 used, which is capable of a gas-tight seal on each one to form selectable upper opening of the valve housing.

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Claims (13)

2G27860 A 38 203 h ■ - 15- h - 125 June 1, 1970 U.S.S.No. 833,560 Claims 1.) Valve for controlling a through at least one line V / gas flowing \ stream with a housing that has a middle Has passage and carries a valve member, which is located parallel to the housing axis from an open position in a the closed position located perpendicular to the housing axis is pivotable, characterized., that the housing axis is vertical and the valve member (120) on its circumference an upwardly open in the closed position Has circumferential groove (136} for receiving liquid, in which protrudes in the closed position an immersion ring (140) which is attached to the inner circumference of the housing (84) and as Whole is directed inward and downward. 2. Valve according to claim 1, characterized in that the valve member is arranged at one end of the housing (84). 3. Valve according to claim 1 or 2, characterized in that the valve member (120) is arranged at the upper end of the housing (84) is and can be pivoted downward from the upper horizontal closed position. 4. Valve according to one of the preceding claims, characterized in that that the housing (84) has a rectangular, preferably square, cross section. - 2 - 009852 / 15V0 A 38 203 h h - 125 5. Valve according to one of the preceding claims, characterized in that that the valve member (120) in plan view has a rectangular, preferably square shape corresponding to the Has housing shape. 6. Valve according to one of the preceding claims, characterized thereby, that the housing (84) is formed by pairs of vertical side walls (86, 88, 90). 7. Valve according to one of the preceding claims, characterized in that that the lower edge of the immersion ring (140) in the closed position into the liquid of the circumferential channel (136) immersed. 8. Valve according to one of the preceding claims, characterized in that that the Ümfangsrinne (136) has a U-shaped cross section. 9. Valve according to one of the preceding claims, characterized in that that the uninterrupted immersion ring (140) has an upper, obliquely inwardly and downwardly directed ring part (142) and adjoining it has a vertical ring part (144) which is at a transverse distance from the side walls of the circumferential channel (136) is in the closed position of the valve member (120). 10. Valve according to one of the preceding claims, characterized in that that a liquid supply (146, 148) above the immersion ring (140), preferably above the inclined Ring part (142) is arranged. 11. Valve according to one of the preceding claims, characterized in that that the housing (84) has a secondary chamber (92) in communication with the housing space, which opposite the device 009852/1540 A 38 203 h 20 2 "7" ίβ "0 housing passage is separated and into which the valve member (120) can be swiveled in the open position. 12. Valve according to claim 11, characterized in that the secondary chamber (92) on one of the vertical side walls (90) is arranged. 13. Valve according to one of claims 1 to 10, characterized in that that the housing (184) has two adjacent inputs (82) and a common output (172) and that the valve member (220) provided with opposite pairs of circumferential grooves (236, 336) about a central axis for Closing of one or the other entrance (82) is pivotable is on which the circumferential grooves (236, 336) of the valve member (220) interact with an immersion ring (230, 240) each, which are arranged on the inner walls of the entrances (82). ORIGINAL INSPECTED 00.9852 / 1640