US2873231A - Regenerators of coke ovens - Google Patents

Description

Feb. 10, 1959 J, w, Y ETAL 2,873,231

REGENERATORS OF COKE OVENS Filed Nov. 2, 1955 5 Sheets-Sheet 1 Feb. 10, 1959 J. w. HlBY ETAL REGENERATORS OF COKE OVENS 3 Sheets-Sheet 2 TC Fgz Dayan-tors Jflfizkby v l ifipb Filed Nov. 2, 1955 Feb. 10, 1959 J. w; HlBY ETAL 2,873,231

REGENERATORS OF COKE OVENS File d Nov. 2. 1955 3 Sheets-Sheet 3 United ates-Pate REGENERATORS OF COKE OVENS Julius Walther Hiby, Aachen, Germany, and Friedrich Karl Hiby, Cheadle Hulme, England, assignors to Simon-Carves Limited, Stockport, England, a British company Application November 2, 1955, Serial No. 544,508

Claims priority, application Great Britain November 8, 1954 3 Claims. (Cl. 202141) This invention relatesto regenerators which are used in coke ovens for the purpose of extracting heat from the hot products of combustion and using the said heat for preheating the air or gas prior to combustion, and which consist mainly of a regenerative space containing open brickwork and a flue or flues placed below the regenerative space, through which the gases are led to or away from the regenerative space substantially at right angles to the direction of flow in the regenerative space.

The flue below the regenerative space serves the purpose of distributing the inflowing gas over the regenerative space or alternatively of receiving the outflowing gases from the regenerative space and is often referred to as a bus flue. The nature of the distribution depends on the static and velocity pressure conditions along the length of the bus flue.

The object of this invention is to provide a simple means by which it is possible to obtain eflicient distribution of the gases flowing into or out of the regenerative space with less pressure loss than is possible with known designs, and moreover Without introducing differences of static pressure between points in the regenerator at the same level so that undesirable drift of gases across the regenerator is prevented.

According to the invention, inserts are arranged to divide the bus flue into two parts, one communicating directly with the regenerator inlet or outlet, in which the flow is in the direction of the bus flue, the other in which the flow is generally in the direction of the passages through the regenerative space, the two parts being interconnected by a multiplicity of curved ducts between the inserts, which ducts open into the two parts of the bus flue in the directions of the gas flows in the said two parts. The flow direction is thus changed as the gas is passing through the ducts between the inserts.

According to a further feature of the invention, the inserts are so arranged that the cross sectional area of that part ofthe bus flue which communicates directly with the regenerator inlet or outlet is correspondingly diminished as the distance from the inlet or outlet increases, so as to be proportional to the quantity of gas flowing.

The invention allows the distribution of flow into and out of the regenerative space to be effected with a less loss of pressure than in known designs, as no dampering of the cross section of the flow is necessary.

Where the bus flue is substantially rectangular in longitudinal section, the inserts may be arranged diagonally,

so that the space on one side of them increases as that i on the other side decreases. Alternatively the bus flue may be tapered away from the inlet or outlet, in which case the inserts may be substantially parallel with the under surface of the brickwork in the regenerative space.

Referring to the accompanying drawings:

Figure 1 shows the lower part of a coke oven battery embodying the invention, the left hand part of the figure being a section on the line B-B and the right hand part a section on the line C-C of Figure 2.

Figure 2 shows a part of the coke oven in section on the line A-A of Figure 1.

Figure 3 is an enlarged section of a part of the bus flue illustrating the arrangement of the inserts.

Figure 4 is a sectional view on the line D-D of Figure 3. I

Figure 5 is a plan view of the inserts.

Figure 6 is an end view of another form of insert.

Figure 7 is a plan view.

Figure 8 is a section of a part of a coke oven battery showing a diflerent arrangement of the inserts.

Referring to Figures 1-5, lean gas for heatipg the oven is introduced through a duct 22 to a waste nearest: 1 and passes along a bus flue section 2a, and between inserts 2b where the direction of flow is changed, to the upper section 2c of the bus flue. The bus flue 2a, 20 is of rectangular section, the inserts 2b being arranged along a diagonal of the rectangular section so that the space 2c increases in cross-section as the space 2a decreases.

The inserts 2b may be preset or may be made movable so that the flow distribution is adjustable.

The gas then passes upwards through the regenerative spaces 3, where it receives heat from the hot brickwork, to the heating flues 4 via the ducts 5.

Air for combustion of the gas follows a similar path through an adjacent bus flue 6 and regenerative space 7, meeting the gas in the heating flues 4.

In the case of rich gas heating, the rich gas is led to the heating flues 4 through pipes 16 without passing the regenerators, both regenerators 3 and 7 being used for preheating the air.

The direction of flow of gases through the heating system is periodically reversed. After the reversal, hot waste gases from the fines 4 pass downwards through ducts 5 into the regenerative space 3 and 7 where they give up a large part of their heat to the brickwork of the regenerator filling. From there they are conducted in the reverse direction through bus flues 20, 2a and 6 to the waste heat flue 8 to be led away.

Removable stoppings 9 are provided so that it required the inserts may be adjusted or removed.

The inserts 2b shown in Figures 35 are hollow metal bodies shown in cross-section in Figure 3. They are welded into metal end plates 10 having beaded edges 11, each pair of end plates carrying two inserts. The end plates 10 rest on sloping ledges 12 formed in the brickwork of the duct 2a, 20.

Figures 6 and 7 show an alternative form of insert made of refractory brick material. This has a solid part 13 of similar shape to the metal inserts shown in Figures 3-5, with integral supporting flanges 14 at each end.

Figure 8 shows a part of a coke oven battery similar to that shown in Figure 1, but having a bus flue 17 which tapers away from the waste heat box 1, underneath a horizontal row of inserts 2b, with a space 18 of uniform cross-section above the inserts 2b and beneath the regenerator chambers 3, 7.

In each case, the inserts 2b are shaped to have between them curved ducts 19 which guide the air or gas from the horizontal line beneath the inserts to the vertical chambers above them.

This invention is illustrated in connection with a battery of coke ovens having a single .waste heat flue, twin divided regenerators and hairpin type heating fines. It should be understood that this invention could be incorporated in other systems of coke ovens as well, e. g. a battery with two waste heat flues, a battery with triple divided regenerators or with heating flues arranged in a 3 What we claim is":

I. A regenerator, for use in a coke oven, having a regenerative space, vertically extending walls beneath said regenerative space providing a bus flue, and a longitudinally extending partition dividing said bus flue into an upper part and a lower part, said partition comprising a plurality of spaced, stepwise aligned, bar-shaped members, each of said bar-shaped members having an outwardly curved leading edge and an inwardly curvedtrailing edge to provide a multiplicity of curved duets betwen said bar-shaped members, the lower part of said bus flue having a floor inclined with respect to said partition so that the cross sectional area of said lower part is decreased at the lower opening of each of said curved ducts by substantially the cross sectional area of said opening;

2. The regenerator structure of claim 1 wherein each of the bar-shaped members is tapered towards its leading edge, and the radius of curvature of each of said leading edges is less than the radius of curvature of each of said trailing edges to provide flare-shaped ducts between said bar-shaped members.

3. The regenerator structure of claim 1 wherein said bar-shaped members are identical and have lug portions at each end for removably supporting said members on said bus flue vertical walls.

References Cited in the file of this patent UNITED STATES PATENTS Otto Mar.

Claims (1)

1. A REGENERATOR, FOR USE IN A COKE OVEN, HAVING A REGENERATIVE SPACE, VERTICALLY EXTENDIG WALLS BENEATH SAID REGENERATIVE SPACE PROVIDING A BUS FLUE, AND A LONGITUDINALLY EXTENDING PARTITION DIVIDING SAID BUS FLUE INTO AN UPPER PART AND A LOWER PART, SAID PARTITION COMPRISING A PLURALITY OF SPACED, STEPWISE ALIGNED, BAR-SHAPED MEMBERS, EACH OF SAID BAR-SHAPED MEMBERS HAVING AN OUTWARDLY CURVED LEADING EDGE AND AN INWARDLY CURVED TRAILING EDGE TO PROVIDE A MULITIPLICITY OF CURVED DUCTS BETWEN SAID BAR-SHAPED MEMBERS, THE LOWER PART OF SAID BUS FLUE HAVING A FLOOR INCLINED WITH RESPECT TO SAID PARTITION SO THAT THE CROSS SECTIONAL AREA OF SAID LOWER PART IS DECREASED AT THE LOWER OPENING OF EACH OF SAID CURVED DUCTS BY SUBSTANTIALLY THE CROSOS SECTIONAL AREA OF SAID OPENING.

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