US1073621A

US1073621A - Device for trapping particles in suspension in gas-currents.

Info

Publication number: US1073621A
Application number: US74609513A
Authority: US
Inventors: Thomas E Murray
Original assignee: Individual
Current assignee: Individual
Priority date: 1913-02-04
Filing date: 1913-02-04
Publication date: 1913-09-23
Anticipated expiration: 1930-09-23

Description

T. E. MURRAY.

DEVICE EOE TEAPPING PARTICLES 1N SUSPENSION 1N GAS GUREENTS.

APPLICATION IILBD PEB. 4, 1913. 1,073,621 Patented Sept. 23, 1913.

THOMAS E. MURRAY; OF NEW YORK, N. Y.

DEVICE FOR TBAPPING PARTICLES IN SUSPENSION IN GAB-CURRENTS.

Specification of Letters VPatent.

Application led February 4, 1913. Serial No. 746,035.

To all 'whom t may concern.'

Be it known that I, THoMAs E. MURRAY, a citizen of the United States, residing at New York, in the county of New York and State of New York, have invented a certain new and useful Improvement in Devices for Trapping Particles in Suspension in Gas- Currents, of which the following is a speeltication.

The object of the invention is to entrap the maximum' percentage of solid particles entrained with and suspended in a gas current.

The invention consists in the construction, hereinafter' set forth, whereby the cross-sectional areaY of the outlet of a vertical flue, throughwhichsaid particles are projected upon ,a body o'f' water, may be varied, and whereby the' distance of said outlet from said water may be simultaneously altered.

. Inl the accompanying drawings-Figurelis a vertical section on' the line fr of Fig. 2' ofmy apparatus for trapping solid partieles in suspension in gas currents. Fig. 2 is ai vertical section of Big. l.

Similar letters of reference indicate like parts.

Ar'epresents a vertical stack or flue, which receives gas currents from the horizontal fines B and C. Said liues B and C may lead from boiler-furnaces, in which case the gas currents therein will entrain cinders or other solid particles' which it is the object of the present device to remove before said currentsrpass to the stack A, and so to the atmospllere. As the arrangement of the device is the same with respect to each of the lues B and C, a description of the parts associated with one flue applies 4equally to both.

Extending inwardly from a wall, as D, of the stack, andabove the flue B, is a partition'- E. Said partition is bent downwardly, and then upwardly, to form a glitter F, the outer edge' of safid tter beingindented, as shown' in dotted lines Fig. l. Entering the stack wall Gr, above partition E, is a pipe H which supplies water to the gutter F. Another water supply pipe J may, if desired, lead to the opposite end of said gutter th-roughrthe stack wall K. The gutter F. receives the bentover upper edge L of a loose partition M, as shown on the right of Fig. 2, and when the partition is in this position, it is suspended from partition E. The edges of said partition are in proximity to opposite walls G, K of the stack, as

Patented Sept. 23, 1913.

shown in Fig. 1, so that said partition with the walls of said stack together form a vertical compartment or duct. The lower edge of partition M is connected to the ad- Lacent stack wall by a link N. There may e several such links connected to said partition and wall. To artition M is attached a wire cord or rope which passes over a pulley P, supported on a bracket Q within the stack, and is led out of the stack through a suitable opening in the wall thereof. By means of the cord O, the partition M may be raised bodily from the position shown on the right to that shown on the left of Fig. 1, and when so raised, said partition is suspended by said cord, its edge L then being lifted out of the gutter F. The link N is then caused to assume a more nearly horizontal position. By reason of this raisin of the partition M, the area of the intervz between its lower edge and the adjacent side wall of the stack is enlarged. The minimum area of this interval is attained when the edge L of partition M rests in the gutter F, and the maximum area when the partition is raised to bring the link N into an approximately horizontal position. At they bottom of the stack is provided a funnel-shaped tank R for water, which, at its constricted end, communicates with a discharge pipe S, having a valve T. Any suitable means for maintaining the water level constant ma be installed, such as the open vertical over owpipe U.

The operation is as follows: lVater admitted to gutter F by pipe l'l or pipes H and J escapes through the indentations in the edge of said gutter, flows downwardly on the surface of partition M, and so' enters the tank R. After the water in said tank rises to a predetermined level, the excess escapes continuously by pipe U, the level thus being maintained constant. The gas current entering by flue B, first impinges upon this descending water sheet, then passes downwardly in the duct V formed between the stack wall D and partition M, an descapes at the constricted opening W between said partition and wall. Practically all of the solid particles in said gas current which have not been caught by the descending water sheet are projected downwardly upon the surface of the water in tank R and there trapped. Any which may escape are obliged to encounter the water falling in the Hue,

from the lower edge of partition M before` `cur, for example, 1n steam-boilers using forced draft, which under special conditions or to meet load emergencies, may` be driven temporarily much above their normal ratings. 'lhe opening W between partition M and stack wall may atA the outset be fixed at such an area as, with a current. in the Hue of some predetermined normal velocity, will cause the particles to be projected over a certain minimum distance to the water below, the velocity of escape and the distance traversed being such as will result in eHective trapping of the particles. This, for eX- ample, may be represented by the position of the parts shown on the right of Fig. l. if now, the current velocity should increase the partition M is raised, thus enlarging the area of opening W, and increasing the distance of that opening from the water level, until the velocity of escape ot the particles at said opening is reduced to that which they had prior to said increase; or, in other words, by varying the area of the outlet W and the distance of Said outlet from the water level, the striking :torce of the particles upon the water below is kept substantially constant. Where the current velocity in the Hue is to be normally high, and decreases therein are to be guarded against, the position of the parts shown on the lett of Fig. 2 may be the normal position, and a fall in velocity is then met by lowering the partition M, say to the position shown on 'the right of Fig. 2, in order to increase the velocity of current discharge and reduce the interval overV which the particles areprojected.

L The object of the indentations in the edge of.' gutter F is to distribute the How from said gutter over the surface of partition M,

yand to prevent said How being cut 0H by contact of partition and gutter, as might occur it the gutter edge were straight.

. The accumulation of solid matter in the tank R is removed from time to time by opening valve T, the Hue currents being temporarily shut 0H.

l claim:

l. A device for trapping particles in suspension in a gas current, comprising a Hue, a tank therein,,a vertical duct in said Hue communicating at its upper portion with a .source of gas current, terminating above said tank and having a suspended wall, a

`link connecting said suspended wall to the opposite fixed wall of said duct, and means for bodily raising and lowering said suspended wall.

2. A device for trapping particles in sus- 'ering said loose partition, and

pension in a gas current, cou'lprising a Hue, a partition therein forming with the Hue walls a vertical duct having an inlet for gas current at its upper end and an outlet at its lower end, means for raising and lowering said partition and to vary the cross sectional area of the outlet of said duct, and a tank disposed in said Hue below said partition.

3. A device tor trapping particles in suspension in a gas current, comprising a Hue, a tank therein, a partition extending in wardly from a wall of said Hue, said Hue having a gas current inlet below said partition, a loose partition in said Hue forming with the Hue walls a vertical duct and ter* minating above said tank, means 'tor suspending said loose partition in proximity to the inner edge of said Hrst-named parttion, and means for bodily raising and low* ering said loose partition and to vary the cross sectional area of the outlet ot said duct.

4. A device for trapping particles in suspensionin a gas current, comprising a Hue, a tank therein, a partition eXten wardly from a wall of said Hue, said Hue having a gas current inlet below said partition, a loose partition in said Hue forming with the Hue walls a vertical duct and terminating above said tank, means for suspending said loose partition in promixity to the inner edge of said first named partition, and means for bodily raising and lowa link between said loose partition and said Hue wall.

5.' A device for trapping particles in suspension in a gas current, comprising a Hue, a tank therein, a partition extending inwardly from a wall of said Hue, said Hue having a gas current inlet below said partition, a loose partition in said Hue forming with the Hue walls a vertical duct and disposed above said tank, means or suspending said loose vpartition from said Hrstnamed (partition, and means for bodily raising sai loose partition and to vary the cross sectional area of the outlet of said duct.

6. A device for trapping particles in suspension in a gas current, comprising a Hue, a tank therein, a partition extending inwardly from a wall of said Hue, said Hue havingv a gas current inlet below said partition and a water inlet above said partition, a loose partition in said Hue forming with the Hue walls a vertical duct and terminating above said tank, and means for suspending said loose partition in proximity to the inner edge of said Hrst-named partition, and means for bodily raising and lowering said loose partition and tovary the cross sectional area of the outlet of said duct.

7. A device for trapping particles in suspension in a gas current, comprising a vering intical Hue, a tank therein, a partition extend ing inwardly from a wall of said flue and having a gutter at its inner edge, said Hue having a gas current inlet below said partition, a loose partition in said Hue forming with the Hue Walls a vertical duct and having its upper ed e bent over and received in said gutter an terminating at its lower edge above said tank, a link connecting said loose partition to said Hue wall, and means for bodily raising and lowering said loose partition.

8. A device for trapping particles in suspension in a gas current, comprising a vertical Hue, a tank therein, a partition eXtending inwardly from a wall of said Hue and having a gutter at its inner edge, said Hue having a gas current inlet below said partition and a water inlet communicating with said gutter, a loose partition insaid Hue forming with the Hue walls a vertical duct and having its upper edge bent over` and received in said gutter and terminating at its lower edge above said tank, a link con- `necting said loose partition to said Huewall,

and means for bodily raising and lowering said loose partition.

In testimony whereof I have affixed my signature in presence of two witnesses.

THOMAS E. MURRAY.

Witnesses:

GERTRUDE T. PORTER, MAY T. MCGARRY.