SU148008A1 - Regenerative coke ovens with combined heating - Google Patents

Description

Subject 1 of the invention is regenerative coke ovens with a combined heating, with a side or bottom supply of heating gas.

The ovens offered are in order. that the furnaces are equipped with double-flow channels and heating channels with steam heating, recycling of combustion products and group heating without recycling.

This design of the furnaces ensures uniform heating of the coking chamber and more efficiently use the properties of various heating gases.

FIG. 1 shows the heating scheme for coke oven gas; in fig. 2- the same, section on LL; in fig. 3 - heating scheme for blast furnace gas; in fig. the same section on bb.

The regenerators are divided by deaf partitions 1, 2, 3 into four sections 4, 5, 6 Vi 7, under each of which there is an independent bottom channel S, 9, 10 and 11c with grate 12, 13, 14 and 15. Bottom channels 8 to The n outermost sections are short, located in the upper rune and over the entire length are covered with grates 12 and 15. The bottom channels 9 and 10 of the middle sections are long, there are deafs under the outer sections of the regenerators and under the middle sections they are covered with grates 13 and 14.

The heating wall 16 is broken and the vertical channels 17, the number of which is accepted depending on the given length of the furnaces (with a length of 13,120 li-, 26, 14080 mm -28, 15040 mm - 30 and 16000 mm - 32 verticals). The longitudinal axis of the battery passing through the central transverse partition 2 of regenerators, the pier is divided into two parts, located respectively on the machine and coke sides. If half the total number of verticals is an odd number, then two more verticals are taken from the machine side. For example,

No. 148008-2, with the number of verticals equal to 30, 16 are taken from the machine side, 14 from the coke side. However, if the polar of the number of verticals on one side of the battery is an odd number, then the greater (even) number of verticals taken over the middle section of the regenerator. For example, when the number of verticals is 14 on one side, 6 is taken over the outermost sections 4 and 7, and 8 verticals above the middle section.

. In the odd partitions 18, the pier walls are arranged at the bottom of the recirculation windows 19, and in the even partitions 20 they are absent. In all partitions, except for the central. Partition 21, there are pass windows 22 arranged at the top. Each vertical of the pier is connected by short slanting passages 23 with corresponding regenerators.

The flow of gas, air and products in the heating system when the furnace is heated with coke oven gas is as follows (Fig. 1 and 2).

Combustion air enters from both sides of the battery through the air holes of the gas-air valves (not shown) to the bottom channels 5, 9, 10 and //, from which all four sections 4, 5 of the regenerator 5 and 7 simultaneously feed.

The heated air from the regenerators through oblique passages 23 and 24 enters the heating channels 17, where coke oven gas from the gas distribution kayals 25 is also supplied. and 24 they are sent to regenerators. Combustion products from the heating walls enter simultaneously all sections of the regenerators operating on the downstream. Thus, both the regenerators operating on the air support and the regenerators operating on the combustion products, from the machine side to the coke side, are filled with flows of the same direction. Regenerators with different flow directions alternate: two regenerators operate on the upstream, two on the downstream, etc. (Fit. 2). The exception is the extreme regenerators in the battery.

There are two gas distribution channels 25 under each furnace; one of them feeds even verticals with gas, the other odd. After turning the direction of the gas changes.

The direction of flow when heating furnaces with blast gas is shown in FIG. 3 and 4.

As follows from FIG. 1, of the two sections of the regenerator, located on each side of the battery, engine or coke oven, air and blast furnace gas flow into one of some sections, extreme 4 and 7 or middle 5 and 6. The figures show the direction of flow with a single turnout when upstream run extreme sections. All extreme sections along the length of the battery operate on a stream of one direction, upward or downward, in turn, all middle sections along the battery also operate on the same flow, but in the opposite direction. In the upward flow, sections operating on blast furnace gas or in air alternate through two, i.e., two sections serve to heat the blast furnace gas, the other two to heat the air (Fig. 4). If the extreme sections of the machine side work on blast furnace gas, then the extreme sections of the coke side work on the same gas. The same section operation scheme, therefore, is also adopted for air.

The heated blast-furnace gas and air from sections 4 to 7 of the regenerators enter the groups of channels 17 above them. The combustion products, collecting IB of the upper part of the pier, pass successively through the windows of this group and then distribute in vertical lines of the downward group, through the oblique passages 23 and 24 are sent to the middle sections 5 and b of the regenerators, of which along the bottom 9 and / O channels are diverted to the fire and then to the chimney.

Through the turning, the direction of flow changes. In: the second routing, the extreme sections 4 to 7 of all regenerators of the battery operate on the downstream, the average 5 and 6 on the upstream.

The proposed coke oven design can be used both for the new construction of coke shops and for the transfer of batteries in existing factories using combined coke ovens.

Subject invention

Regenerative coke ovens with combined heating, with side or bottom supply of heating gas, characterized in that, in order to ensure uniform heating of the coking chamber and more efficient use of the properties of various heating gases,: the furnaces are equipped with double flow channels and heating channels with steam heating, recirculation combustion products and group heating without recirculation.

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