US1606032A

US1606032A - Device eob cleaning exhaust gases

Info

Publication number: US1606032A
Authority: US
Publication date: 1926-11-09
Anticipated expiration: 1943-11-09

Description

Patented Nov. 9, 1926.

UNITED stares AMANDUS KOLSTRAND, OF SEATTLE, WASHINGTON.

DEVICE FOR CLEANING EXHAUST GASES.

Application filed September 5,1924. Serial No. 735,994.

My invention relates to improvements in gas and smoke cleaning devices for use in connection with engines and the object of my invention is to provide simple and eiiicient means for removing all dirt and soot from the discharging exhaust products of engines, particularly internal combustion engines.

Other objects are to provide means for mutiiing the exhaust of internal combustion engines; to provide means for reducing the back pressure in the exhaust pipes and muffier; and to provide means that will reduce the vibration occasioned by the exhaust.

Other and more specific objects will be apparent from the following description taken in connection with the accompanying drawings. g

The present invention is especially well adapted for marine use where smoke and soot are very undesirable but may also be found useful in connection with other than marine engines. On boats and ships having internal combustion or oil burning engines it is common practice to allow the open end of an exhaust pipe to terminate within an upright smoke stack of the usual form. V hen this is done certain by-products of combustion, as soot and oil will often 30 settle on the vessel, thus constituting a nuisance. The smoke and fumes of the exhaust. gases will also envelop the vessel and provevery disagreeable at times.

This undesirable feature is partly overcome in some vessels by positioning the exhaust pipe so that it will discharge from the side of the vessel near the water line but when this is done the side of the vessel near the end of the exhaust pipe will be blackened in well. known manner and certain conditions of the wind will blow the soot, smoke and exhaust gases, and even sprays of water thrown up by the exhaust gases, over the vessel.

My present invention removes the necessity for terminating the exhaust pipe at the side of the vessel by providing means for washing the exhaust gases thereby removing all solid matter and a great deal of the smoke and impure gas from the exhaust products.

In the accompanying drawings, Figure 1 is a view partly in vertical section and part ly in elevation of apparatus constructed in accordance with my invention.

Fig. 2 is a View in cross section on broken j 1 line 22 of Fig. 1. i

Fig. 3 is vertical section of a modification of the invention.

Referring to the drawings, throughout which like reference numerals designate like parts, 5 designates an exhaust pipe from aninternal combustion engine and 6 designates a smoke pipe or stack into which the pipe 5 is arranged to project.

In accordance with my invention I provide a solid water tight bottom 7 for the smoke pipe 6 and let the exhaust pipe 5 extend upwardly through a packing or leak proof connection 8 in the center of this solid bot tom 7. The top of the exhaust pipe 5 is closed by a cap 10 and the side walls of said exhaust pipe are provided, a short distance below the cap 10, with a plurality of slots or perforations 11 arranged at frequent intervals entirely around the pipeandalfording ample area through which the exhaust gases may discharge in a siclewise direction.

F or convenience the upper end of the exhaust pipe may be made separable from the remainder of saidpipe and connected therewith by a coupling 12.

An inverted cap or casing 9 is placedover the end of exhaust pipe 5 and may be" secured to cap 10 by a screw 4- The casing 5 is provided below the slots 11 with a plurality of perforations 18 that are surrounded by a water chamber 14 which connects with a pipe 15 through which water is supplied under pressure, the arrangement being such that an annular spray'which amounts to substantiall-y a thin sheet or film of water is directed inwardly against the pipe 5. All of the exhaust gases discharging from slots 11- will be caused to pass downwardly through this film of water and all solid matter, as soot and oil, and a great deal of the smoke will be caught by the water and carried down the exterior of the exhaust pipe 5 into the reservoirformed in the bottom of stack 6 from which it may be discharged through an outlet pipe 16. The exhaust gases, after passing through the water, pass out of the bottom end ofcasing 9 and thence up and out of the stack 6. The exhaust gases strike the water in the bottom of the stack 6 with considerable force and may tend to carry finely divided particles of water upwardly with them. To prevent the escape of any of this water in liquid form l I provide above the casing 9 an annular bafiie plate 17 having a central opening 18 and another baiile plate 19 arranged directly above the opening 18, said baffle plates serving to catch and throw back any particles of liquid or solid matter that might otherwise escape.

It will be noticed that the direction of movement of the exhaust gases is reversed or changed from an upward to a downward direction before they pass through the film of water and that such gases are moving downward when they issue from the casing 9 into the stack 6 thus tending to cause any solid particles whose momentum carries them through the spray of water to fall into the trap at the bottom of stack 6. Water may be supplied through pipe 15 by connecting the same to the usual water circulation system. of an engine.

In addition to cleaning the exhaust gases the device also serves as a muffler to muffle the noise of the explosion, while the cold water flowing down the sides of the pipe 5 cools such pipe, and, by cooling the exhaust gases in said pipe contracts said exhaust gases and reduces back pressure in the exhaust pipe.

I have also found that this device tends to reduce the shock of vibration produced within a smoke stack by the discharge of gases following explosions in rapid succession. This, I attribute to the cooling and condensing effect of the water and to the fact that the gases are emitted in transverse directions from the exhaust pipe,

In some instances it may not be desirable to place this device in the smoke stack, as, for instance, where the smoke stack is at a relatively high elevation and it is desired to connect the water spray device with 'the water circulation system of an engine and the pump in said water circulation system is not capable of supplying water at the. height of the smoke stack. In instances of this nature I provide a device of the form shown in Fig. 3 in which 20 is a drum which may be located near an engine, not shown, and 21 is an exhaust pipe from the engine arranged to extend axially into the drum 20. An inverted casing 22 is placed over the end of exhaust pipe 21 and secured thereto, said casing having a water jacket space 23 connected with a water inlet pipe 24 and arranged to spray water through perforations 29 onto exhaust pipe 21. Outlet perforations 25 for exhaust gas are provided near the upper end of xhaust pipe 21. 26 and 27 are baffle plates located above casing 22 and corresponding in purpose and function to battle plates 17 and 19 in Fig. 1, and 28 is an outlet pipe. through which the cleaned exhaust gas may escape. The end of outlet pipe 28 may terminate within. a smoke stack, not shown. The bottom of drum 20 forms a receptacle in which water may collect. This water is permitted to overflow into an annular trough formed by a' ring 30 and is drawn off through a discharge pipe 31. I find that particles of soot and solid matter that float will be carried over into the trough formed by ring 30 and discharged. more promptly than they will be where I use only a discharge pipe and no trough as shown in Fig. 1. The trough thus prevents the accumulation of solid matter in the water chamber.

The device shown in Fig. 3 operates in substantially the same manner as the device shown in Figs. 1 and 2, the exhaust gas discharging transversely through perforations 25 passes downwardly through the spray of water from perforations 29, strikes the water in the bottom of drum 20 and passes upwardly as shown by arrows and out through pipe 28.

The foregoing description and accompanying drawings clearly disclose. a preferred embodiment of my invention, but, it will be understood that this disclosure merelyillustrative and that such changes in the device may be mace as are within the scope and spirit of the following claims.

I claim:

1. In apparatus of the class described, an upright exhaust pipe having a plurality of openings near its upper end through which exhaust gas may be emitted sidewise, a casing of larger diameter than said exhaust pipe extending down over exhaust pipe and leaving an annular passageway between the walls of the casing and the walls of the pipe, said casing having an annular ring of perforations, means forming a water chamber around said ring of perforations and means for supplying water under pressure to said water chamber to cause a spray of water to be directed inwardly onto said ex haust pipe.

2. In apparatus of the class described, a smoke stack, a water tight bottom in said smoke stack, water outlet means connected with said smoke stack at a short distance above said bottom, an exhaust pipe extending upwardly through said bottom into said.

smoke stack and having circumferential openings near its upper end through which exhaust may be emitted at right angles to said pipe, an inverted casing resting on the upper end of said exhaust pipe and extending downwardly over the upper end thereof to form an annular passageway between the oasing and the pipe through which exhaust gases may pass downwardly and means for directing a spray of water from said casing across said annular passageway in the path of said gases and onto said exhaust pipe.

AMANDUs KOLSTRAND.