JPS6158508B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The invention provides a heat storage chamber running over the entire length of the furnace for preheating air or lean gases and recovery of waste heat, an outlet slit to the heating flame duct distributed over the height of the heating flame duct. Heating of a regenerative coke oven battery heatable with rich gas and lean gas, comprising a supply of air or air and lean gas through passages in the heating flame duct connecting wall and a rich gas supply to the heating flame duct. Regarding equipment.

Such heating devices are two-part systems having a heating wall divided in the center in the direction of coke extrusion for flame path alternation, and systems in which the heating wall is divided into multiple groups of heating flame paths.

In this heating system, there are problems regarding the optimal distribution of the heating gas and combustion air which enters the heating flame duct from the connecting wall channel via the outlet slot. The distribution of heat over the heating flame path height is achieved by varying the air volume with the heating gas supply approximately equal. However, with this method an optimum heating effect can only be achieved if the heating gas is combusted with the theoretically required amount of air.

In order to control the heat distribution in the heating flame duct, it is also known to give a preferential direction to the airflow in the heating flame duct by arranging a slanted upward tie wall slit, and to form the tether wall slit in a closable manner. Yes (West German Patent No. 1211125).

Do not align the exit slits vertically in one line.
It is likewise known to provide exchangeable nozzle bricks of various cross-sections arranged laterally offset from each other and of different cross-sections at the opening of the outlet slot to the heating flame channel (see, for example, German Patent No. 1903805).

With this heating device, for example, when switching the heating from gas-rich to gas-poor gas or vice versa, or when the heat demand of the heating wall changes, the air supply ratio can be changed from the outside, i.e. from the cold part of the battery to the type of gas or type of coal. It is only possible to adapt the flame formation in the heating flame duct so that the flame formation necessary for the desired advantageous wall heating is achieved without large heat losses.

Regenerative coke oven batteries also have regenerator compartments divided by lateral walls for combustion air or lean gases, with high and low combustion sections in each heating flame duct and rich gas feed holes at the bottom of the heating duct. It is known that the lower combustion section of the heating flame duct is connected to a respective first section of the regenerative type, and the upper combustion section is connected to a respective second section of the regenerative type, each section extending over the entire height of the heating duct. In order to achieve uniform heating, it has a cross section adapted to the different amounts of air or lean gas to be supplied to the combustion section at different heights. Although the amount of heating medium in such heating can be adjusted from the outside low temperature part, in this case there are only two combustion parts in the heating flame path, one on the upper side and one on the lower side, and the present invention There are not as many gas or air outlet slits from the connecting wall passage to the heating flame duct as in the case.

Furthermore, a regenerative coke oven capable of heating with gas-rich or gas-poor gas has a passage in the heating flame duct connecting wall of the heating wall and a lean gas or air outlet slit from the connecting wall passage to the heating flame duct and a compartmentalized regenerator. Batteries heating devices are known, in which the regenerator is connected on the one hand via a bottom flame channel with a gas-poor or air valve or with a waste heat valve and on the other hand with a connecting wall passage, which converts gas-poor to gas-rich or vice versa. or when changing over from one type of coal to be coked to another, the cross-sectional size of the poor gas or air outlet slits of the connecting wall passages connected to different storage compartments is constant over the height of two or more. However, by being selected according to various rules, it is formed to be optimally suited for the task. In this case, the cross-section of the gas or air outlet slits of adjacent or opposing connecting wall passages of one heating flame channel increases or decreases linearly over the height and can also vary according to other laws. This formation of the slit cross-section makes it possible to distribute the air to a number of locations over the height of the heating flame duct, with the air distribution being carried out from the outside, i.e. from the cold part of the battery to the air-exhaust valve at the outer end of the bottom flame duct. (see German Patent No. 2013024).

The outlet slits of the connecting wall passages can also be arranged above the heating flame duct, ie above half the height of the heating duct, so that the air conditioning and therefore the heat regulation reaches far into the top of the furnace chamber. However, in the case of a centrally divided heating system, for example in the case of a centrally divided heating system, the possibility of adjusting or supplying air in the area of the upper horizontal passage of the furnace chamber at the level where the coal is charged does not exist in the prior art. do not. The upper horizontal passage in the case of a coke oven battery with a heating system divided in half is
This corresponds to the upper heating gas passage leading beyond the connecting wall to the adjacent heating flame duct of the same heating wall in the case of a battery with a four-flame duct heating system. This is at the same time a direction reversal of the heating gas. Such inversions also exist in the case of hairpin-shaped heating flame channels.

However, depending on the working conditions, this system also has the possibility of controlling the air supply in the area of the horizontal passage or in the area of the reversal of the heating gas from one heating flame duct or groups thereof to an adjacent flame duct or groups thereof. This is desirable.

The object of the invention is that the air supply is also possible in the area of the upper horizontal passage or in the area above the connecting wall, so that even in this area the temperature or the air-to-gas ratio can be adjusted in a complementary manner depending on the working conditions. The purpose is to improve the heating system so as to make it possible.

According to the invention, this purpose is achieved by providing that a connecting wall channel serving only for the air supply runs in the connecting wall up to the upper end of the connecting wall, and that the upper horizontal channel or heating gas changes its flow direction from upwards to downwards or vice versa. This is solved by having an outlet opening in the region of the heated gas inversion on the connecting wall and by controllably shaping its cross section.

In this case, it is advantageous to controllably form the cross-section of this outlet opening, for example by means of a covered slide brick, with which it is also possible to completely close off the outlet slot.

The inventive design of the heating system as proposed in German patent application P 3119923, no. 9 is particularly advantageous.

According to the invention, air can optionally also be introduced into the upper horizontal channel or the upper part of the heating flame channel, if air or additional heat is required in this area of the carbonization chamber. The amount of air supplied to the upper horizontal passage is the remaining portion taken out from the bottom of the heating flame path, so the overall amount of air does not change, but
Gas combustion is partially shifted to the upper horizontal passage or equivalent position.

Furthermore, the means of the present invention is advantageous in terms of reducing NOx in combustion exhaust gas. This is because combustion can occur under air deficiency in the lower region of the heating flame duct and after-combustion can occur in the region of the horizontal passage. Such control of combustion has not been possible in furnaces of known construction.

Next, the present invention will be explained with reference to the drawings.

Figures 1 to 3 show a so-called 4-flame-path heating system using rich gas, Figure 4 shows a 4-flame combined heating system using rich gas and poor gas, and Figure 5 shows a heating system divided in half for rich gas and poor gas. shows.

In the figure, 1 represents a ceiling, 2 represents a partition wall between individual heating flame path groups, and 3 and 3a represent slide bricks. 4 is a hollow connecting wall having two air supply passages, and 5 is a hollow connecting wall having only one air supply passage. 6, on the other hand, is a centrally located solid connecting wall, that is, a connecting wall without passages.
7 and 7a are connecting wall passages, and 8 is an opening to the upper horizontal passage of the four flame ducts. 9 is a connecting wall slit, and 6a represents an upper connecting brick. 10 is 2
The heating flame path is partitioned by a connecting wall 4 with two air supply channels 7 and a connecting wall 5 with one channel 7a. On the other hand, 10a is a heating flame channel partitioned by a connecting wall 5 having one air supply passage 7a and a solid connecting wall 6, that is, having no air supply passage. 11 is a slide brick support plate, and 12 is a horizontal passage above the four flame ducts. 13
(Figure 2) represents the rich gas supply passage to the heating flame duct. 14 represents a battery center structure made of silicate material, and 15 represents a heat storage chamber. 16 represents a hearth lining, and 17 represents a heating wall. 18 (Fig. 3) is the furnace chamber, and 19 is the side wall brickwork of the four flame gas supply passages. 20 is a rich gas nozzle, and 21 is a heating gas reversal section (FIG. 1).

In FIG. 4, 22 is a passage top, and 23 is a partition wall of a group of heating flame channels. 30 is a sliding brick, by means of which the opening 80 of the air passage 70 penetrating the connecting wall 40 to the four-flame horizontal passage 120 can be closed or its cross section can be changed.
90 is an air outlet slit from the connecting wall passage 70 to the heating flame duct 100. 30a is a slide brick on the slide brick support plate 110, and this brick can change the heating gas passage cross section from the heating flame path 100 to the four flame path horizontal passages. Slide brick support plate 110 of connecting wall 60
is on the upper connecting brick 60a. Tie wall 6
0 is the poor gas passage 70a and the gas outlet slit 9
It has 0a. All heating flame ducts 100 are partitioned by two connecting walls, one of which has two air supply passages 70 penetrating to the upper end, and the other connecting wall 60 only has one poor gas supply passage 70a. It is. The gas inversion section is indicated at 210.

FIG. 5 shows an embodiment according to the invention of a centrally divided heating wall. In this case the upper horizontal passage is indicated at 220 and the gas inversion section at 230. 240
is like the sky of the upper horizontal passage. In this heating system, a central connecting wall 250 is arranged in the middle, which wall comprises two air supply channels 260 with outlet slots 270 to the heating flame channel 280 . The air supply passage 260 in the tie wall 250 does not penetrate to the upper end of the tie wall, which supports the upper tie brick 250a and the closing plate 290 at the upper end. The other heating flame path 300 is an air supply passage 32 that penetrates to the upper end.
0 and a tie wall 310 having an opening to the upper horizontal passage 220. This upper opening is indicated at 330 and its cross section can be varied by a sliding brick 340 supported on a sliding brick support plate 350. The outlet of the heated gas from the heating flame channel 310 to the upper horizontal passage 220 has a variable cross section by the sliding brick 370 on the sliding brick support plate 360. The tie wall passage 320 includes an air outlet slit 380 to the heating flame path, and the tie wall 390 includes a lean gas supply passage 400 and an outlet slit 410.

The direction of gas flow is indicated by arrows 500 and 500 in the drawing, respectively.
600 and 700. When switching the heating direction, the gas flows in the opposite direction.

[Brief explanation of the drawing]

Figure 1 is a vertical sectional view of the four-flame duct heating system, Figure 2 is a vertical sectional view of the connecting wall passage in Figure 1, perpendicular to Figure 1, and Figure 3 is a plan view of the flame duct in Figure 1. Figure 4 is a longitudinal cross-sectional view of a four-flame heating system using rich gas and poor gas.
FIG. 5 is a longitudinal sectional view of a heating system divided into halves with rich gas and poor gas. 2, 23... partition wall, 3, 3a, 30, 30a,
340,370...slide brick, 7,70,
320... Connecting wall passage, 4, 5, 6, 40, 6
0,250,310...Connecting wall, 8,80,3
30...Exit opening, 10, 10a, 100, 28
0,300...flame path, 18...furnace chamber, 19...side wall, 20...rich gas nozzle.

Claims (1)

[Scope of Claims] 1. A regenerator running over the entire length of the furnace for preheating the air or lean gas and recovering waste heat, with outlet slits to the heating flame duct distributed over the height of the heating flame duct. In a heating device for a regenerative coke oven battery capable of being heated with rich gas and lean gas, the heating device has a device for supplying air or air and a lean gas through a passage in a connecting wall of the heating flame path, and a device for supplying rich gas to the heating flame path, Connecting wall 4, 5, 40, 310
Connecting wall passages 7, 7 for internal air supply only
a, 70, 320 to the upper end of the tie wall and to the upper horizontal passage 220 or on the tie wall where the heated gas changes its direction of flow 500, 600, 700 from upward flow to downward flow or vice versa. It has an outlet opening 8, 80, 330 to the heated gas reversal section 21, 210;
A heating device for a regenerative coke oven battery, characterized in that a cross section of 30 is formed in a controllable manner. 2. Device according to claim 1, in which the outlet opening 8, 80, 330 is provided with a sliding brick 3, 30, 340.