US666978A - Apparatus for flue-dust condensation. - Google Patents

Description

No. 666,97a`. Patented 1an. 29, lam.

R. RUETSCHI. APPARATUS FUR FLUE DUST CNDENSATION.

(Appliation' led Aug.' 25,' 1899.)

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No. 666,978. Patented 1an. 29, |901. B. RUETSCHI.

APPARATUS FOR FLUE DUST CUNDENSATION.

. (Applieeionled Aug. 26, 1899.)

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No. 666,978. Patented lan. 29, |90I.

R. BUETSCHI. APPARATUS FOR FLUE DUST GUNDENSATIN.

(Application led Aug. 25, 1899.) (No Model.)

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PATENT RUDOLPH RUETSCHI, OF ARGENTINE, KANSAS.

APPARATUS FOR FLUE-DUST CONDENSATION.

SPECIFICATION forming' part of Letters Patent No. 666,978, dated January 29, 1901.

Application led August 25,1899.Y Serial No. 728,439. TNO model.)

To all whom, t may ooi/worn:

Be it known that I, RUDOLPH RUETSCHI, of Argentine, in the county of Wyandotte and State of Kansas, have invented certain new and useful Improvements in Apparatus for Flne-Dust Condensation, of which the following is a full, clear, and exact description.

The invention relates to appliances for mechanically precipitating and collecting the solid matter contained in the fumes emanating from metallurgical establishments.

The object of the invention is to provide certain new and useful improvements in fluedust condensation to insure a rapid and thorough separation and precipitation of the solid matter from the gases.

The invention consists of certain parts and details and combinations of the same, as will be fully described hereinafter and then pointed out in the claims.

A practical embodiment of my invention is represented in the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding parts in all the views.

Figure l is a plan view of the apparatus. Fig. 2 is an enlarged transverse section of one of the cooling devices, the section being on the line 2 2 in Fig. 3. Fig. 3 is a side elevation of the same with parts in section. Fig. 4 is a side elevation of theimproved apparatus With parts in section. Fig. 5 is an enlarged transverse section of the mixing device, the section being on the line 5 5 in Fig. l. Fig. 6 is an enlarged transverse section of the cooling device on the line 6 6 in Fig. t. Fig. 7 is an enlarged sectional plan view of the main suction and distributing-fan. Fig. 8 is an eng larged sectional side elevation of one of the cooling and precipitating devices. Fig. 9 is a plan view of the same. Fig. l0 is a sectional side elevation of a modified form of the cooling and precipitating cylinder. Fig. ll is a similar view of another modified form of the cooling and precipitating cylinder. Fig. l2 is an enlarged side elevation, partly in section, of a modified form of cooling device; and Fig. .13 is a side elevation of another modified form of the same.

The fumes emanating from the furnace are led by means of brick or sheet-metal liues into a cooling device A (shown in detail in Figs. 2

and 6) and provided with a series of longitudinally-extending narrow chambers B, spaced apart to form air-spaces C for air to pass through from the bottom in an upward direction, the air upon being heated by coming in contact with the casings of the chambers B rising rapidly and passing out of the top of the device. The lower ends of the several chambers B open into hoppers D, provided at their lower ends with gates Dl and opening into a conveyer-casing E, having a suitable conveyer-belt E for carrying the solid matter to one end of the casing E to be discharged therefrom through a suitable outlet E2. (See Fig. 4.) The conveyer-belt passes over end pulleys E3, and the lower run thereof also passes oversupporting-pulleys E4,asindicated in Figs. 4, 5, and 6.

The fumes in passing into the cooling device A are distributed through the several chambers B and are cooled therein by an externally-circulating cooling medium in the form of atmospheric air, so that a portion of the solid matter contained in the fumes is condensed and precipitated or caused to adhere to the walls of the chambers B.

In order to remove the matter from the walls of the chambers, I prefer a knocking device (shown in detail in Fig. 2) for causing the solid matter to fall down into the hoppers D and accumulate on the gates thereof, the gates being opened from time to time to discharge the accumulated solid matter upon the conveyer-belt E for delivery to the discharge E2, as above explained. The knocker referred to consists, essentially, of a transverse rod F, of which there are several for the device A, and this rod is connected with the chambers B at or near the middle thereof, and one outer end of the rod is pivotally connected witha lever F', fulcrumed on a bracket F2, secured to the framework of the device A. A spring F3 is secured with one end to the rod, the other end abutting on the bracket F2, so that when a lever F is swung outward said spring is pressed, and when the operator suddenly releases the lever F then the spring suddenly forces the rod back to its former position, thus giving a sudden shock to the side walls of the chambers and causing the solid matter adhering to the inner faces of the walls to drop down into the hoppers D.

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The inlets C for the air-spaces C are at the upper ends of the hoppers D, as is plainly indicated in Fig. 3.

The forward ends of the chambers I3 open 5 into a flue G, leading to a pipe H, into which the fumes pass after they are somewhat cooled in the chambers B, and at the entrance of this pipe H is arranged a small mixingfan I, adapted to be driven by the current of the fumes induced by the main fan, as hereinafter more fully-descrihed. The mixingfan I serves to mix the fumes coming from the several chambers B, so that fumes of a higher temperature are mixed with those of a lower temperature to equalize the temperature of the fumes as the same pass through the pipe H. The pipe H is provided at its bottom with a number of hoppcrs H', leading to tubes H2, having gates H2, and opening into the conveyer-casing E, the gates H3 being normally closed, so that any solid matter that may drop from the fumes while passing through the pipe H can accumulate on the gates until the latter are opened, and then the accumulated solid matter is discharged upon the conveyer-belt E'. The end of the pipe H connects with a flue G', opening into a second cooling device A', similar in construction to the cooling device A, above referred to. The chambers B of this device are connected at their forward ends with a fine G2, opening into a pipe H4, containing a mixing-fan I', similar to the fan I and for the Same purpose. Any desired number of such cooling and mixing devices` may be alternately connected with each other, and I do not limit myself to the two devices A A' and H H4 shown in the drawings. The end of the pipe H4 connects with a conical pipe J, containing an air-inlet K, having a suitable regulating-valve for controlling the amount of air passing into the pipe J to form a mixture of air and fumes. The apex end of the pipe J forms the suction-pipe for the main fan L, of any approved construction, for drawing the fumes through the several cooling devices A A' and the mixing devices H I and I'I4 I' and actuating the fans II' to compress the fumes in the pipe J and to mix atmospheric air with the compressed fumes. The mixture thus obtained is forced through tangential outlet-pipes L' into cooling and precipitating cylinders N, in which the remaining solid matter is precipitated, and the exhaust -gases are discharged by pipes P, preferably into fume-arresters O of the wellknown Freudenberg or Prinz type. The main fan L is provided at its periphery, at each pipe L', with a segmental gate 'L2, forming when closed a part ot' the casing of the fan L, as shown in Fig. 7.

Each of the cooling and precipitating cylinders N is provided with an annular channel N', (see Figs. 8 and 9,) into which opens tangentially the corresponding pipe L', so that the mixture of fumes and air discharged into this channel N' is free to expand and receives a whirling spiral motion in said chamber in a downward direction, to finally pass at the lower end of the channel from the latter into the lower end of a second concentric channel N2, in which the mixture rises and passes at the upper end of this channel into a third concentric channel N2, to pass downward therein and Iinally pass into a central pipe N4, connected with the pipes P, previously mentioned. The separating-walls N8 for the several channels, the pipe N', and the outer wall for the channel N' are in the form of water-jackets, deriving their water-supply from a trough N9, into which opens a watersupply pipe R. The water-jacketed wall for the channel N' is provided with an overflowpipe R', as indicated in Figs. 8 and 9. The lower ends of the two channels N' N2 open into a hopper N5, having outlet-ports NG for discharging the accumulated solid matter from time to time, and a similar hopper N7 is at the lower end of the channel N3 and the pipe N4, and this hopper connects by a pipe Q, having a gate Q' with a receptacle Q2 for receiving the solid matter accumulating in the hopper N7 and discharged from time to time by the operator opening the gate Q'. By giving the mixture of air and fumes a whirling motion in the cooling and precipitating cylinder N in the manner described and at the same time expanding the mixture and bringing the same in contact with the cooled walls of the channels it is evident that a very quick precipitation of the solid matter takes place, the exhaust gases passing from the pipe N4 to the pipes P and the arresters O for further treatment, if deemed necessary. The pipes N4 may, however, open directly into the open air.

The cooling and precipitating cylinders may be of various constructions. For instance, as shown in Fig. lO, the cylinderS is provided with a circular channel S', opening at its lower end into a central pipe S2. A hopper S4 is adapted to receive the solid matter from the channel S' and pipe S2, and said channel S', pipe S2, and hopper S' are preferably water-jacketed, as shown, with a waterinlet pipe R2, connected with the lower ond of the water-jacket.

The cooling and precipitating cylinder T (shownin Fig. 11) is provided with a number of concentric channels T' T2 T3 and a central pipe T4, arranged similarly to the channels N' N2 N2 and the pipe N, above referred to, the channels T' T2, however, opening into a hopper T, concentric with the hopper T5 for the channel T2 and the pipe T1. The hoppers T5 T6 connect by valved pipes T7T2 with a receptacle Q2, having a valved outlet Q4'for discharging the solid matter from the receptacle Q2 whenever it is necessary.

The cooling and mixing devices may be differently arranged. For instance, as shown in Fig. 12, I provide the cooling and mixing device A2 with vertically-disposed chambers B' and corresponding air-spaces C2 and arrange the mixing-pipes H5 in a vertical position, the mixing-fans I2 being at or near the upper ends of said pipes. The lower ends of the chambers B' and the pipes H5 open into hoppers D2, having valved outlets D3 for discharging upon the conveyer-belt, as above explained. The last pipe H6 is connected with the conical suction-pipe J', connected with the main fan L.

As shown in Fig. l5, the cooling and mixing device A3 has its chambers B2 likewise disposed vertically and also the pipes H7; but in this case the mixing-fans I2 are located at or near the ends of said pipes, and the latter and the chambers B2 open into hoppers D4, having valved outlets D5. The last vertical pipe H8 connects at its upper end with the suctionpipe J2, leading to the main fan L. The operation, so far as the cooling and mixing of fumes is concerned, is exactly the same in these devices A2 and A3 as above described with reference to the devices A A', only that the fumes travel up and down instead of in a horizontal direction.

The operation is as follows: When the main suction-fan L is set in motion, then the gases or fumes emanating from the furnace are drawn alternately through the cooling devices A A and the mixing devices H H4. As the gases enter a cooling device they are divided into a number of separate currents and passed through the narrow chambers, thus offering a large cooling as Well as a friction surface, the air passing upward and between the chambers to constantly reduce the temperature of the narrowly-confined gascurrents Very evenly. Any Hue-dust adhering to the sides of the narrow chambers B is removed from time to time by repeated knocking of the knocker referred to, so that the flue-dust collects in the respective hoppers below, from which it is removed from time to time, as above described. As the gases pass out of the cooling-chambers B into the mixing-pipe H they encounter the small fan I, which is agitated by the suction of the main centrifugal fan L, but which fan I is not the full size of the pipe, and thus leaves considerable space between the ends of its blades and the periphery of the pipe, so that the passing gases receive partly a whirling and partly a centrifugal motion, by which action the cooler gases become mixed with the hotter gases before entering the cooling-chambers B of the next following cooling device A', in which Vthe operation described with reference to the first cooling device is repeated. When the gases iinally pass into the tube J by the suction action of the fan L, the gases are somewhatcom pressed and mixed, cooled, and diluted by the air passing through the pipe K into the pipe J. The mixture referred to is im mediately expelled by the centrifugal force of the fan L through the tangentiallylocated pipes L', which are somewhat narrow, and finally discharge the mixture into the large cooling and precipitating cylinders to allow the mixture to expand and force it to travel in a spiral path, as described, to insure further cooling or friction action, so that the gases are finally discharged from the cylinders in nearly an exhausted condition.

By having a number of tangential outletpipes L' from the fan L the main current is divided into a number of smaller currents of high velocity, each current entering its own cooling' and precipitating cylinder, which offers a large cooling and friction area in a comparatively small space.

Having thus fully described my invention, I claim as new and desire to secure by Letters Patent- 1. An apparatus for condensing flue-dust, comprising a cooling device having a series of narrow and longitudinally-extending chambers for the passage of the fumes, said chambers being spaced apart to form circulating air-spaces between them, a mixing device connected with the cooling device and into which pass the fumes from said cooling device for equalizing the temperature of the fumes, a suction-fan connected with said mixing device, and cooling and precipitating cylinders each connected with a discharge-pipe leading from said fan, as set forth.

2. An apparatus for condensing flue-dust, comprisinga cooling device having narrow chambers for the passage of the fumes, said chambers being spaced apart to form circulat-ing air-spaces between them, a mixing device connected with the cooling devices and into which pass the fumes from said cooling device for equalizing the temperature of the fumes, a suction-fan connected with said mixing device, cooling and precipitating cylinders each connected with a discharge pipe leading from said fan, each cooling and precipitating device having a circular water jacketed channel into which opens the discharge-pipe from the said fan, and a waterjacketed discharge-pipe into which opens said channel, for carrying off the exhaust-gases, as set forth.

3. An apparatus for condensing due-dust, comprising a cooling device having narrow chambers for the passage of the fumes, said chambers being spaced apart to form circulating ai r-spaces between them, a mixing device connected with the cooling device and into which pass the fumes from said cooling device for equalizing the temperai ure of the fumes, asuction-fan connected with said mixing device, cooling and precipitating cylinders each connected with a dischargepipe leading from said fan, each cooling and precipitating device having a circular waterjacketed channel into which opens the discharge-pipe from the said fan, a water-jacketed dischargepipe into which opens said channel, for carrying off the exhaust-gases, and valved discharge-hoppers for receiving the solid matter from the said channel and IOO IIO

discharge-pipe, substantially as shown and described.

4. An apparatus for condensing flue-dust, comprising a cooling device having a series of narrow and longitudinally-extending chambers for the passage of the fumes, said chambers being spaced apart to form circulating air-spaces between them, a mixing device connected with the cooling device and into which pass the fumes from said cooling device for equalizing the temperature of the fumes, a suction-fan connected with said mixing device, cooling and precipitating cylinders each connected with a discharge-pipe leading from said fan, and means, substantially as dcscribed, for collecting the solid matter in said cooling device, said mixing device and said cooling and precipitating cylinders, as set forth.

5. An apparatus for condensing line-dust, comprising a cooling device having narrow chambers for the passage of the fumes, said chambers being spaced apart to form circulating air-spaces between them, a mixing device connected with the cooling device and into which pass the fumes from said cooling device for equalizing the temperature of the fumes, a suction-fan connected with said mixing device, cooling and precipitating cylinders each connected with a discharge-pipe leading from said fan, anda knocker for said cooling device, substantially as shown and described.

6. A flue-dust-condensing apparatus, provided with a cooling device, comprisinga series of narrow chambers for the passage of the fumes, said chambers having walls of heatconducting material and spaced a distance apart, to form air-spaces between them opening into the atmosphere, hoppers into which discharge the lower ends of the chambers,

the hoppers being spaced apart to form inlets to said air-spaces, and knocking devices for said chambers, for agitating the side Walls thereof and loosening the solid matter adhering thereon, as set forth.

'7. In a flue-dust-condensing apparatus, the combination of cooling and mixing devices lconnected together, a ilue leading from the cooling and mixing devices, a fan connected with said flue for drawing the fumes through the cooling and mixing devices, said fan having a series of tangentially-arranged discharge-pipes, and a series of cooling and precipitating vessels, with each of which a discharge-pipe of the fan is connected, substantially as described.

S. In a flue-dust-condensing apparatus, the combination with cooling and mixing devices, anda fan for drawing the fumes therethrough, of a cooling and condensing cylinder, into which the fan discharges, said cylinder comprising a plurality of concentric channels communicating with each other alternately at the top and bottom said channels being provided with water-jackets, an inlet-pipe passing tangentially into the upper end of the outermost channel, and a central outlet-pipe connected with the innermost channel at the lower end thereof, as set forth.

9. A ilue-dust-condensing apparatus, comprising a cooling device, a mixing device connected with the cooling device and comprising a fan, a flue leading from the mixing device, a fan at the end of the said flue for drawing the fumes therethrough and mixing air therewith, the last-named fan being provided with tangential discharge-pipes, and cooling and precipitating vessels with which the discharge-pipes of the fan are connected, substantially as described.

lO. Adue-dust-condensingapparatus,com prising a cooling device, a mixing device connected with the cooling device and comprising a fan, a flue leading from the mixing device, a fan at the end of the flue for drawing the fumes therethrough, the last-named fan having a plurality of tangential dischargepipes,cooling and precipitating cylinders with which the discharge-pipes of the fan are connected, and arresters connected with the cooling and precipitating cylinders, substantially as described.

1l. ln a flue-dust-condensingapparatus,the combination with a cooling device having a plurality of hopper-shaped Valved bottoms, and a mixing device having a plurality of hopper-shaped valved bottoms and connected with the cooling device, of a conveyer-casing arranged below the cooling and mixing devices and into which the hopper-shaped bottoms lead, said casing having an outlet at the end which extends beyond the cooling device, and a conveyor in said casing, substantially as described.

l2. Inaflue-dust-condensingapparatus,the combination with a cooling device, comprising a series of chambers spaced apart to form airspaces between them,of means connected with the side walls of the several chambers at or near the middle thereof for simultaneously imparting a sudden shock to the walls of the said chambers, substantially as described.

13. Ina llue-dust-condensingapparatus,the combination with a cooling device, comprising a series of chambers spaced apart to form airspaces between them, of a rod secured to the said chambers, a lever pivoted to a support on the cooling device and to the rod, and a spring surrounding the rod and adapted to be compressed when the rod is pulled outward by the lever, substantially as described.

14. An apparatus for condensing flue-dust provided with a precipitating device, comprising a series of narrow oblong chambers and air-spaces between the oblong chambers, the latter being open at the ends for the free passage of the gases, and the air-spaces being open for the air to pass through to externally cool the walls of the chambers to cause the solid matter in the gases passing through the chambers to be precipitated by cooling and friction,substantially as shown and described.

l5. An apparatus for condensing flue-dust provided with a precipitating device, coinprising a series of vertically-arranged narrow oblong chambers, and air-spaces between the oblong chambers, the latter being open at the ends for the free passage of the gases and the air spaces being" open for the air to pass through to vexternally cool the Walls of the chambers to cause the solid matter in the gases passing through the chambers to be precipitated by cooling and friction, and hoppers into 1o which open the lower ends of series of the chambers, substantially as described.

RUDOLPH RUETSOHI. Witnesses:

WM. MIDDLEKAUFF, JAMES D. STEWART.

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