US1827612A - Cooling coke - Google Patents

Description

Oct. 13 931. w REBER 1,827,612

COOLING COKE filed May 21, 1926 3 Sheets-Sheet 1 I Ill, ,1/1

Oct. 13, 1931. J, w, REBE' 1,827,612

COOLING COKE Filed May 21, 1926 3 Sheets-Sheet 2 fame/v fies 717a: 50/152 $z verzior Oct. 13, 1931. J. w. REBER 1,827,612

' COOLING COKE Filed lay 21, 1925 3 Sheets-Sheet 3 510a: P485 FIRE 706! 80/11 2 Patented Oct. 13, 1931 JAMES WILSON REBER, OF LONDON, ENGLAND COOLING COKE Application filed May 21, 1926, Serial No. 110,707, and in Great Britain May 25, 1925.

A known method of cooling coke consists in circulating gases through the hot coke and some form of apparatus for heat recovery, such as a waste-heat boiler. Generally, for

the maximum usefulness of the recovery apparatus the heat applied to it should be as constant in temperature as possible and attempts have been made to ensure this constancy.

By the present invention this object is attained by keeping a considerable reserve of hot coke above the body of coke through which the gases are circulating, and causing this hot coke to travel into the gas stream at a rate as constant as possible.

For example, any known form of apparatus suitable for cooling coke by the method in question and comprising a shaft-like chamber can be operated according to this invention by providing it with a continuously operating discharging device at bottom, altering the off-take of the circulating gases so that it is at a considerable distance below the-level to which the chamber is filled with hot coke,and operating the discharging device at such speed that there is always a quantity of hot coke above the level of the ofl-take.

Under these conditions the feed of hot coke into the gas current may be kept substantially constant notwithstanding the intermittent charging of coke to the chamber, with the result that the ratio of the volume of gases to that of coke through which they travel remains constant so long as the rate of circulation of the gases is the same. This will tend to ensure a constant temperature of the gases leaving the cooling chamber, with the result (in the case of a waste heat boiler) that a constant quantity of steam per unit time is generated.

The fact that the shaft-like chamber contains a considerable reserve of hot coke makes it worth while to provide the chamber with a water jacket in known manner and to use this jacket for preheating the water fed to the waste heat boiler which is heated by the cooling gases, or to connect the water space of the acket with that of the waste heat boiler.

In the accompanying drawings, Fig. 1

represents a vertical section through a coke cooling plant constructed according to the invention; Fig. 2 shows a vertical section through a coke cooling chamber according to the invention having a jacket forming a water-space in communication with the Waste heat boiler of the plant; Fig. 3 shows a modification of Fig. 2.

In each figure the Waste heat boiler, which known tubular type.

is indicated diagrammatically, is of the Referring to Fig. 1 the cooling chamber a is constricted at its lower end and has an inclined bottom b, at the lower edge of which is a coke discharging device 0 which may be constructed as shown in The Woodall- Duckham System of Continuous Carbonization in Vertical Retorts 1923, pages 22-27. This device is rotated on its axis and in conjunction with hangers (1 determines the regular discharge of the coke from the cooling chamber into the receiver 6. The latter nected'with the receiver 6.

The fan, therefore, circulates the cooling gases through the lower half of chamber a and the waste heat boiler i.

The chamber a is kept substantially full of coke. Its upper part is normally closed by a plate a shown in dotted lines.

WVhen,

as determined by the rate at which the discharging device 0 is operated, the chamber is ready to receive another charge of coke, the plate a is raised to the position shown in full lines by the approaching telpher carriage Z which is bringing a skip full of hot coke into position for discharge into the hopper m and thence into chamber a.

The

telpher carriage then recedes and the plate a descends to close the chamber.

In no case is the level of the hot coke in chamber a al lowed to fall to the level of the outlet pipe 9. As is known, it is advisable to substitute continuously or intermittently, for a portion of the circulating gases, a like portion of air to ensure combustion of any combustible gas which may be generated in'the cooling chamber. In the construction shown in Fig. 1 this air is drawn through a valve g into pipe 9, so that the combustible gases are burnt in the V waste heat boiler, and the corresponding volume of gases is expelled through valve .h on v V the discharge side of the fan 76.

In Figs. 2 and 3 the parts already described have the same lettersas those already used. In Fig. 2, the waterin the water jacket '0 is circulated by a pump 'n/througha worm 0 in the feed water tank 39 of the waste heat boiler 2'. The tank 72 has an automatic feed q.

1 I In Fig. 3 the upper part 1' of the jacket '0 constitutes the steam space of the waste heat boiler i, the lowerpart or water space of the jacket 'beingconn'ected as shown by pipes s and t with the water space of the boiler 2'.

- Alternatively, the pipe t may be omitted and both the space. 7' andthe boiler 2' connected with a steamdrum u, as shown in'dotted lines,

Havingthus described the nature of the said invention and'the best'means I know of carrying the same into practical efi'ect, I

'claim V A process of cooling hot coke, comprising 7 forming the hot coke into a substantially ve r tical column, continuously withdrawing coke from the lower part of the column and thereby causing the coke to continuously move downwardly, passing a stream of cooling j gases chemically inert towards hot coke into to the lower part of the columnto cause-said gases to traverse the column longitudinally and in-counter-currentto the moving coke, withdrawing the gases from the column at a point a substantial distance below the upper end of the column, feeding hot coke to the upper-endof the column so as to maintain a substantial mass of hot coke above the por 'tion of the column traversed by the gases, I extractingheat from the gases withdrawn fromv the column, 'and returning the withdrawn gases to the lower part of the column for re-use in the process. v r In'testim-ony hereof I have signed my name to thisspecification.

JAMES WILSON REBER.

Images