CA1045575A - Coke side pushing emissions control system - Google Patents

Abstract

ABSTRACT OF THE DISCLOSURE
A shed-like structure, open at the bottom and at the ends covers the coke side equipment of a coke oven battery. A fume collecting main under the structure has a plurality of air scoops through which particle-laden air flows into the fume main. Conventional fans and the like to induce circulation of air within the structure are not necessary according to the present disclosure.

Description

`- ~045575 1 This invention relates to a coke side pushing emissions control system and consists of a frame structure extending along the coke side of a coke oven battery and supporting sheet metal siding and roofing that cover a fume collecting main and guiding and collecting equipment for hot coke when pushed from a coke oven chamber.
The siding extends downwardly to a level some distance above ground level; the ends of the covered frame structure are open and not closed.
Air scoops, disposed as regular spaced apart locations in the fume collecting main underneath the siding and roofing provide access for particu-late laden air into the fume collecting main.
For a further understanding of the invention and for features andadvantages thereof~ reference may be made to the following discription and the drawing which illustrates a preferred embodiment of apparatus in accordance with the invention.
The drawing illustrates schematically a transverse sect:Lon through apparatus in accordance with the present inventlon.
In the drawing, a portion of a coke oven battery 11 is indicated schematically, and associated with the coke oven battery 11 is an enclosed coke guide 13, a hood 15 over a coke quenching car 17, a fume collecting main 19 and mechanism 21 for operating closures 23 on the collecting main 19. This system is already known.
Ad~acent to the ume collecting main 19, and extending above the coke guide 13 a~d hood 15, is a typical truss structure 25, one of several that are located at spaced-apart intervals along the entire length of the coke oven battery 11. The truss structures 25 support sheet metal siding 27 that extends vertically from level A9 some distance above ground level~, up and over the hood 15 and coke guide 13 to a location B. The siding 27 extends laterally the entire length of the coke oven battery and up to a convent^lonal coke quenching station (not shown). From ad~acent location B, other sheet metal slding 29 extends downwardly from location C to the top of the battery ll at location D; the siding 29 extending laterally the same distance as s.lding 27.

1, .. ~
.

Between the edges of the siding 27, 29, at locations B and C, there is a small gap or space In fact, the truss structure 25 is self-supporting and is not supported on the usual coke oven buckstays.
The sheet metal siding 27, 29 forms a shed-like covering over the entire coke side of the battery including the fume main 19, coke guide 13, hood 15 and the quenching car 17. The shed-like covering is, however, open to the atmosphere at the ends and below the bottom edge of the siding 27, below level A.
The fume main 19 has a plurality of spaced apart air scoops 31 which comprise a length of tubing with a flared upper end portion 33. The flared end portion 33 is located conveniently about where shown in the drawing.
A plurality of hinged emergency vent doors 35 (only one being shown) sre provided in the shed-like covering 27, at the top thereof, and conveniently where sh~wn in the drawing.
The known apparatus previously described is effective in capturing emissions during the actual pushing sequence. However, when the door iB first removed from the coke oven chamber to be pushed, and when the coke gulde is retracted from-tne oven after pushing, such apparatus is not efective to remove emissions that occur after ~e door is re ved and before the coke guide i~ moved into position against the oven face, and before the door is replaced on the oven after pushing.
The apparatus of the present irlvention, comprising the frame structure and the shed-like covering over the known apparatus together with the air scoops 31 in the fume collecting main 19, are effective in removing emissions ~-during the period after the door is first re~oved and while the door is being replaced.
The fu~e collecting ~ai~ is under a slight vacuu~ or negative pressure at all times9 whereby the emissions are drawn continually thereinto through the air scoops. The emissions cannot escape up~ardly into the atmosphere because of the shed like covering on the truss frame~ork.
Assuming that the coke oven battery produces coke that has been .

~.
.. " , , ~ , . . . . .

- ~4557S
carbonized satisfactorily and that contains very little uncarbonized areas9 the ma~or emissions are generated as the coke is pushed from the oven chanber and as it falls into the coke quenching car. Since there is always a slight vacuum or negative pressure in ~he fume colecting mai.n, particle laden gases and fumes that are present under the shed-like structure during the time after the doors are removed and before pushing commences, aLnd after pushing stops and ~ :
before the doors are replaced, are drawn through.the air scoops in~o ~he fume collecting main.
Furthermore, because the bottom and the ends of the shed-lilce s~ruc- -ture sre open, a natursl upward circulation of air within the shed-like structure ~akes place and heavy particulate matter is carried into the air scoops.
From the foregoing description of one embodiment of the invention, those skilled in the art should recognize many important featurea and advan-tages of it, among which the following are particularly significant: .
That the shed-like structure of the pre3ent invention is effective to capture particulate emissions Just prior and lmmediately after pushing and also while the coke quenching car i5 travelling to the quenching station;
That the structure i8 effective to capture such emissions as are released from around coke oven doors that leak during coking;
That fans and other eqoipment, used in some prior art instances to induce evacuation of particulate matter, are ~ not used and are not necessary because of the natural circulati~n of ambient air into the zone beneath the shed-like - structure of the present invention; :
That~ since there is a natural upward circulation of a~bient air into such zone, it is possible for operating personnel ~ :
to enter and to work therein under normal operating conditions, :whereas, in prior art shed structures that are totally enclosed ..
: . - 3 ~ ~
''":

.: .. - . . .. . . .. .

S~5 no personnel can enter and work therein; and That the natural circulatlon of amblent air into the zone beneath the shed-like structure provides enough air veloci~y to carry the heavier particulate emissions upwardly and into the air scoops. .
Although the invention has been described herein with a certain degree of particularity, it is understood that the presen~ d:Lsclosure has been made only as an example and that the scope of the inventio~l ls defined b.y what is hereinafter claimed.

~ ;, : ' ~ .

, .

:

~ - :
.

: ; ,' ' ':~ '

Claims (2)

THE EMBODIMENTS OF THE INVENTION IN WHICH AN EXCLUSIVE
PROPERTY OR PRIVILEGE IS CLAIMED ARE DEFINED AS FOLLOWS:

1. In a coke oven battery, a coke side emissions collecting and control system comprising:
a) a frame structure;
b) a fume collecting main extending along the length of the coke side of said battery and supported by said frame structure;
c) siding supported by said frame structure and forming a shed-like covering over said main and equipment for guiding and collecting coke pushed from an oven chamber of said battery, operable to collect any fumes issued from said battery at all times from the removal of the doors to the replacement of the doors of said coke oven battery, said fumes which are uncollected by other apparatus; and d) means in said fume collecting main for allow-ing particulate laden air beneath said shed-like covering to enter into said main, said shed-like covering being open at the bottom for a preselected distance above ground level and open at its ends.

2. The apparatus of claim 1 including:
a) means in said shed-like covering for reliev-ing a sudden build-up of pressure therebeneath.