US3839161A

US3839161A - Smoke hood for coke ovens

Info

Publication number: US3839161A
Application number: US00374235A
Authority: US
Inventors: E Pries
Original assignee: Dr C Otto and Co GmbH
Current assignee: Dr C Otto and Co GmbH
Priority date: 1972-12-27
Filing date: 1973-06-27
Publication date: 1974-10-01
Anticipated expiration: 1991-10-01
Also published as: FR2212413A1; JPS4990701A; DE2263482A1; IT1002518B; JPS5222641B2; GB1399038A; DE2263482B1; FR2212413B3

Abstract

A movable smoke hood is arranged above a coke receiving car and extends along the front of a battery of coke ovens. A tubular coke guide forms a passageway for a coke mass ejected from a coke oven chamber. This guide is connected in a smoke-tight manner to a central upstanding portion of a smoke hood used to envelop the fall space wherein the coke mass passes into the coke receiving car. The smoke hood is further made up of hood portions at each side of the central hood portion. The hood has a roof connected to side walls which extend downwardly below upstanding side walls of the coke receiving car. End walls on the car project upwardly into a closely-spaced relation with the underside of the roof at each side of the central portion for minimizing infiltration of air into the smoke hood.

Description

United States Patent 1 1 Pries [73] Assignee: Dr. C. Otto & Comp. G.m.b.H.,

Bochum, Germany 22 Filed: June 27,1973

21 Appl.No.:374,235

Erich E. Pries, Bochum, Germany [30] Foreign Application Priority Data [58] Field of Search... 98/115 VM, 115 R; 202/227, 202/228, 230, 263

[56] References Cited UNITED STATES PATENTS 3,647,636 3/1972 Helm 202/263 3,648,593 3/1972 Marshall 98/115 R 3,715,282 2/1973 Pries et al. 202/263 3,716,457 2/1973 Schon 202/263 3,721,609 3/1973 Spindeler 202/230 3,746,626 7/1973 Morrison 202/227 3,766,018 10/1973 Riechert 202/263 3,788,236 1/1974 Edgar 202/263 FOREIGN PATENTS OR APPLICATIONS 2,021,863 12/1971 Germany 202/227 Primary Examiner-William F. ODea Assistant ExaminerPaul Devinsky Attorney, Agent, or Firm-Brown, Murray, Flick & Peckham [57] ABSTRACT A movable smoke hood is arranged above a coke receiving car and extends along the front of a battery of coke ovens. A tubular coke guide forms a passageway for a coke mass ejected from a coke oven chamber. This guide is connected in a smoke-tight manner to a central upstanding portion of a smoke hood used to envelop the fall space wherein the coke mass passes into the coke receiving car. The smoke hood is further made up of hood portions at each side of the central hood portion. The hood has a roof connected to side walls which extend downwardly below upstanding side walls of the coke receiving car. End walls on the car project upwardly into a closely-spaced relation with the underside of the roof at each side of the central portion for minimizing infiltration of air into the smoke hood.

7 Claims, 5 Drawing Figures sum 2% 5 m MQ VNI

PAIENIEUBBI H974 snwaor SMOKE HOOD FOR COKE OVENS BACKGROUND OF THE INVENTION This invention relates to a smoke hood apparatus for connection in a smoke-tight manner to a guide grating receiving a coke mass ejected from a coke oven chamher. The smoke hood is arranged for alignment with each coke chamber forming a battery of coke ovens for which purpose the hood is movably supported above a coke receiving car in front of the coke ovens.

Typically, when a coke mass is pushed out of an oven chamber, it slides through a guide grating or chute and then falls downwardly upon a loading platform for a coke car. When this occurs, particularly when the coke is on the loading platform, very brisk burning of the coke takes place due to contact with the air. This burning of coke and the resulting combustion of gases produce strong currents of rising air which carries with it large amounts of dust. The purpose of using a smoke hood is to prevent such smoke and gases from polluting the environment.

Smoke hoods, known in the art, are movable either on a coke car or on a special track above the coke car. These hoods were constructed to span the discharge area and, in other instances, they were designed to include a closure for the area above coke quenching equipment. Usually, these hoods were provided with exhaust treating equipment in the form of gas scrubbing devices for the smoke developed upon the discharge of the coke mass from the oven. In another form, the exhaust equipment was connected to a col lector duct that extended along the battery of coke ovens to receive the smoke developed at different loca tions along the ovens.

The design of these smoke hoods did not provide an air-tight seal at all sides of the hood and therefore air from the surrounding area infiltrated into the hood. This burdens the exhaust equipment and requires a greatly increased exhaust capacity over that which would be required to process only the smoke developed by the burning coke. Attempts have been made in the past to reduce the infiltration of air into smoke hoods by providing a plate extending from the hood downwardly into the coke car for the purpose of sealing off the part of the car which has not been filled with coke. Other smoke control efforts have been addressed to providing a roof above the entire area in front of a battery of coke ovens to overlie the area where the coke is discharged and load it into the coke transfer car. This arrangement is quite expensive and generates a dangerous condition because of insufficient ventilation with fresh air under the roof whereby it is unbearable for personnel to remain in this area.

SUMMARY OF THE INVENTION It is an object of the present invention to provide at the discharge side of a coke oven, a smoke hood having a simplified construction and designed in a special manner to minimize the entrance of infiltrating air into the smoke hood during the discharge of a coke mass into a coke receiving car.

According to the present invention, there is provided a smoke hood apparatus comprising an upstanding central hood portion and having at each of two sides additional hood portions attached thereto, the upstanding central hood portion is designed to envelop a fall space wherein a coke mass passes from a coke guide into a coke receiving car, the hood portions at each side of the central portion having a length approximately equal to the length of the coke receiving car, and end walls on the car project upwardly into a closely-spaced relation with the underside of the roof for the hood side portions.

The present invention additionally provides a downwardly sloping coke transfer chute on the coke car for receiving coke passing through the fall space in the smoke hood. The side walls for the coke receiving car project above the coke transfer of the chute and side walls of the smoke hood project downwardly below to the upper surface of the side walls of the coke car. A coke discharge opening is formed in the side wall of the hood adjacent the coke oven to further define the fall space for coke passing into the coke car. The ends of the smoke hood are open for the passage of the coke car from beneath the smoke hood.

The smoke hood according to the present invention is particularly characterized by the formation of small gaps between the hood and the coke receiving car such that very small amounts of infiltrating air pass into the space enveloped by the hood whereby the volume of gas to undergo dust removal and scrubbing is kept within reasonable limits.

These features and advantages of the present invention as well as others will be more readily understood when the following description is read in light of the ac companying drawings, in which:

FIG. 1 is an end elevational view of a smoke hood embodying the features of the present invention, the hood being shown in its operative relation with the coke guide chute and a coke oven chamber, the latter being shown in cross section;

FIG. 2 is a front elevational view of the apparatus shown in FIG. 1;

FIG. 3 is a sectional view taken along line IIIIII of FIG. 1;

FIG. 4 is an end elevational view similar to FIG. 1 but additionally illustrating the exhaust and scrubbing equipment for smoke collected by the hood apparatus according to the present invention; and

FIG. 5 is a front elevational view taken along line V-V of FIG. 4.

With reference now to FIG. 1 of the drawings, there is illustrated an oven chamber 10 enclosed by an oven roof 21 and an understructure 22 containing the usual regenerative heat exchangers. The brickwork defining the coke oven is braced by means of posts 23 spaced along the coke ovens. As illustrated in FIG. 2, there is a battery of side-by-side coke oven chambers 10 which together form the coke oven. A platform 24 extends along the discharge side of the coke ovens (FIG. 1) where it is supported below the oven chambers by supports 25. The platform carries spaced-apart parallel rails 25A for wheels 26 which support a guide grating 27 for coke mass as it is displaced horizontally upon ejection from one of the coke oven chambers. The guide grating actually consists of two

parts

28A and 28B which can be moved with respect to each other in the longitudinal direction of the oven chamber.

Spaced outwardly and below the guide grating are parallel spaced-apart tracks 29 used to support trucks 29A of coke receiving cars 30 which are displaced along the tracks by an engine 31. Each coke receiving car 30 has a downwardly inclined chute 32 with a coke receiving surface 32A for the transfer of glowing coke into the coke receiving cars 30 from where, after quenching, the coke is discharged upon a ramp 18. The coke receiving car includes a side wall 33 extending above the upper end of the chute 32 which is adjacent the coke oven and a side wall 34 at the opposite side of the car. These walls are joined at the ends of the coke receiving car by

end walls

35 and 36 which extend in a vertical direction beyond the height of the

side walls

33 and 34.

FIGS. 1-3 illustrate a smoke hood apparatus in the form of a unitary structure consisting of an upstanding central hood portion 37 and

side hood portions

38 and 39 connected at opposite sides to the portion 37 so as to define a smoke hood 40 extending in a horizontal direction along a number of coke oven chambers. The upstanding central hood portion 37 projects above the coke guide grating 27 and this hood portion is somewhat wider than the coke mass guide grating so that it can be connected in a smoke-tight manner by a detachable coupling ll3. The smoke hood is supported at spaced locations along its length by wheels 41A and 418. The wheels 41A engage rails carried by the platform 24 and the wheels 41B engage rails 42 which are carried by supports 17 arranged at the side of the smoke hood opposite the platform 24. As shown in FIG. 1, the supports 17 also carry a collector duct R for the exhaust of smoke from the smoke hood 40.

As best shown in FIGS. 2-4, the

portions

37, 38 and 39 of the smoke hood each include a roof plate 52 defining the upper surface of the hood which is joined to a side wall 43 facing the coke oven. The wall 43 passes downwardly to enclose the upper edge of wall 33. The hood is designed to conform to the profile of the coke receiving car as best shown in FIG. 4. The wall 43 lies above the chute 32 and is bent to extend in a horizontal direction toward the coke oven. At the terminal end of this horizontal wall portion a vertical wall 44 extends in a closely-spaced relation with and below the side wall 33 of the coke receiving car. The

walls

43 and 44 extend along the entire length of the hood with the exception that at the central portion of the hood, the

walls

43 and 44 define an opening 12 to the fall space enclosed by the hood for the passage of coke into the coke receiving car. A side wall 45 forms the side of the hood remote to the coke ovens. The wall 43 extends downwardly beyond and encloses the top surface of the wall 34 of the coke car.

The upstanding central portion 37 of the smoke hood is attached to a pipe 14 for the delivery of smoke and fume collected within the hood to the collector duct and connected thereto by means of an intermediate connection piece 16 (FIG. 1).

FIG. 3 illustrates the position of thecoke receiving car for the initial loading of coke into the car. As the coke is ejected from the coke chamber, it passes through the guide grating and thence into the smoke hood where it passes through the entrance opening 12 to the fall space that is specifically enveloped by the hood portion 37. The coke passes into the coke receiving car while it is moved in the direction of the arrow 11. It will thus be observed that the end wall 36 of the coke car is placed nearest the point where the upstanding central portion 37 joins the hood portion 39. As the coke is loaded into the coke receivingcar, the ensuing production of smoke is collected in the side portion 38 of the hood which, as indicated previously, is enclosed by the roof 52 and

side walls

43, 44 and 45 which are closely spaced from the

side walls

33 and 34 of the coke car. The

end walls

35 and 36 of the car form end enclosures for the smoke hood. At the end of the coke pushing process, the coke car is moved to the end wall 35 and advanced toward the central portion 37 of the hood. Thus, throughout the time while coke is loaded into the coke receiving car, the smoke produced is collected under the hood without the undesirable infiltration of large quantities of air. This is made possible by designing the hood so that very small gaps are provided between the walls of the hood and the walls of the coke car.

As described above in regard to FIG. 1, a collector duct for the exhaust of smoke extends along the coke ovens. According to FIGS. 4 and 5, the hood 40 is provided with a special arrangement of equipment for the treatment of smoke developed during the coke pushing operation. The upstanding central portion 37 of the hood 40 is attached to a duct 19 which communicates with a distribution chamber 20 that is, in turn, connected to side-by-side cyclones 46. The solid particles separated by the cyclones 46 are collected in containers 47 while the smoke remaining in the cyclones is carried through a duct 48 to a blower 49 used to discharge the gases into a duct 50. The duct 50 contains a washer or scrubber. An opening 51 is provided for discharge of the smoke after cleaning.

Although the invention has been shown in connection with certain specific embodiments, it will be readily apparent to those skilled in the art that various changes in form and arrangement of parts may be made to suit requirements without departing from the spirit and scope of the invention.

I claim as my invention:

1. The combination of a movable smoke hood apparatus disposed above an independently moveable coke receiving car and extending along the front of a battery of coke oven chambers, a tubular coke guide supported on a platform and having an inlet end receiving an ejected coke mass from one of said coke oven chambers, said smoke hood apparatus comprising an upstanding central hood portion connectable in a smoketight manner to said tubular coke guide for enveloping a fall space wherein a coke mass passes from said coke guide through the fall space into said coke receiving car, a hood portion at each side of said central hood portion for collectively defining a smoke hood having a length which extends along the front of a plurality of oven chambers forming at least part of the battery of coke ovens, said smoke hood being moveable into a stationary coke receiving position at spaced positions along the front of said plurality of oven chambers, the length of each hood portion at the side of the central hood portion being essentially equal to the length of the coke receiving car, a roof for each of said hood portions, and end walls on said coke car projecting upwardly into a closely-spaced substantially smoke tight relation with the underside of said roof for the hood portions at the sides of said central portion for minimizing the infiltration of air into said smoke hood.

2. A smoke hood apparatus according to claim 1 wherein said combination further includes an elongated coke transfer chute carried by said coke receiving car, said transfer chute defining a coke receiving surface at the bottom of said fall space and being inclined for the sliding of coke into said car, said chute extending between and lying below the upper edges of said end walls,

3. The combination according to claim 2 wherein said coke receiving car further includes a first side wall upstanding from said coke transfer chute, a second side wall forming part of said car at a side thereof opposite to said first side wall, said first and second side walls extending between said end walls and below the upper surface thereof.

4. The combination according to claim 3 wherein said smoke hood is further defined to include first and second side walls extending downwardly from the roof for each hood portion for enclosing the upper edges of the side wall of said coke receiving car, the side wall of the smoke hood most adjacent the coke oven defining an opening in said central hood portion for the entrance of a coke mass into the fall space enveloped thereby.

S. The combination according to claim 4 wherein said side wall of the smoke hood most adjacent the coke oven is further defined to include a wall portion extending above the coke receiving surface of said coke transfer chute and a laterally-spaced wall portion extending below the upper terminal end of said coke receiving surface.

6. The smoke hood apparatus according to claim 1 wherein the opposite longitudinal ends of said smoke hood are open for the passage of said coke receiving car relative thereto, the arrangement being such that said end walls of the coke car define a closure for the smoke hood at each side of said central hood portion.

7. The smoke hood apparatus according to claim 6 further comprising rails supporting said smoke hood for movement along said battery of coke ovens to align said central portion with a coke oven chamber.

l l l

Claims

1. The combination of a movable smoke hood apparatus disposed above an independently moveable coke receiving car and extending along the front of a battery of coke oven chambers, a tubular coke guide supported on a platform and having an inlet end receiving an ejected coke mass from one of said coke oven chambers, said smoke hood apparatus comprising an upstanding central hood portion connectable in a smoke-tight manner to said tubular coke guide for enveloping a fall space wherein a coke mass passes from said coke guide through the fall space into said coke receiving car, a hood portion at each side of said central hood portion for collectively defining a smoke hood having a length which extends along the front of a plurality of oven chambers forming at least part of the battery of coke ovens, said smoke hood being moveable into a stationary coke receiving position at spaced positions along the front of said plurality of oven chambers, the length of each hood portion at the side of the central hood portion being essentially equal to the length of the coke receiving car, a roof for each of said hood portions, and end walls on said coke car projecting upwardly into a closelyspaced substantially smoke tight relation with the underside of said roof for the hood portions at the sides of said central portion for minimizing the infiltration of air into said smoke hood.

2. A smoke hood apparatus according to claim 1 wherein said combination further includes an elongated coke transfer chute carried by said coke receiving car, said transfer chute defining a coke receiving surface at the bottom of said fall space and being inclined for the sliding of coke into said car, said chute extending between and lying below the upper edges of said end walls.

5. The combination according to claim 4 whErein said side wall of the smoke hood most adjacent the coke oven is further defined to include a wall portion extending above the coke receiving surface of said coke transfer chute and a laterally-spaced wall portion extending below the upper terminal end of said coke receiving surface.