WO1983001455A1

WO1983001455A1 - Coke extinction device

Info

Publication number: WO1983001455A1
Application number: PCT/DE1982/000207
Authority: WO
Inventors: Kuhn & Co. Maschinenfabrik Gmbh Hartung
Original assignee: Riecker, Johann, Georg
Priority date: 1981-10-16
Filing date: 1982-10-15
Publication date: 1983-04-28
Also published as: JPS58501727A; EP0091471A1; DE3141242A1; DE3141242C2; EP0091471B1

Abstract

The device for extinguishing coke comprises an extinction container (1) provided with walls (15), a bottom (12), a removable cover (2) having on its bottom face sprayers (9) and an exhaust opening (14) for the gases formed during extinction. In the lower part of the extinction container (1), on at least two opposite walls (15), there are provided exhaust openings (14), each of them being connected at a branching (3) and each comprising a grid-shaped retainer (16) extending on their inner section. The grid is preferably adjustable so that it is possible to vary the free passage section. Further, the grid may be arranged in the branching pipe (3) outside the vertical wall of the container so that it is not in contact, or only slightly in contact with incandescent coke.

Description

Coke release device

The invention relates to a coke quenching device according to the preamble of patent claim 1.

Coke quenchers are known. For example, in DE-PS 8T3 686 a device for deleting

10 described by Koks, which has a container with a sloping bottom and at the lower end of an opening for the escape of water vapor. During the spraying of extinguishing water, the container is provided with a tightly fitting lid 5. The steam generated during the extinguishing process flows through the glowing coke mass in the extinguishing container and leaves the container through the opening at the bottom end.

When using modern coke ovens, this device must be moved during the pressing-out process to take up the red-hot coke and must have a length of about 14 to 24 m. This makes dust removal very difficult, since the detection hoods 5 are designed to be very large and contain considerable amounts. gases containing dust must be extracted. Also, the packed bed of coke in the quenching car and characterized ^'Hindurch¬ the flow of water vapor is very uneven, resulting in 0 considerable differences in the coke temperature and in the Koksfeuchte because of the very slanted bottom. Finally, the device is not suitable for using the gases released during the extinguishing, such as water vapor, for further use. b

OMPI DE-PS 23 20057 discloses a method and a device for extinguishing a heated bulk material, in particular coke. In this case, the coke to be cooled lies in a container on a permeable floor. The container is closed with a lid with outlet openings for the extinguishing water. The extinguishing container • 0 rests on a box, the grate bar of which consists. The upper part forms the permeable container bottom. At least one of the side walls of the box can be pivoted outwards.

Here, the bottom of the extinguishing container, which is designed as a grate, is heavily stressed for various reasons:

a) The grate is exposed to strong impacts each time the extinguishing container is loaded due to the coke falling from a height of 8 to 10 m;

b) the grate must support the weight of the coke fill, which can reach 30 t;

c) the grate is heated by the glowing coke, which has temperatures of 1000 to 1100 C;

d) water vapor acts on the grate, which can reach temperatures up to 770000 CC, higher pressures also occurring,

e) the rust attack reactive substances, such as sulfur oxides and hydrogen sulfide, which are either dragged into the coke bed with the extinguishing water or during the Extinguished by the steam from the coke?

f) the grate is subjected to the above-mentioned stresses periodically, since the extinguishing cycle is repeated continuously. This causes signs of aging to appear in the rust material earlier than with constant long-term stresses.

It should be taken into account that these loads on the grate occur to a large extent at the same time.

To date, there is still no material available which, despite the stresses mentioned, enables such gratings to have a long service life. That is why these gratings have to be replaced frequently. The corresponding assembly work can only be carried out inside the extinguishing container, for which purpose it has to be cooled. This results in operational interruptions of at least 4 to 6 hours.

In addition, the extinguishing of the coke is often impaired by the fact that smaller pieces of coke get stuck in the openings of the grate and block them ^* , so that the passage of water vapor. is difficult.

It is also perforated by the box under the

Bottom of the extinguishing container according to DE-PS 23 20057 reduces the maximum pouring height of the coke by approximately 600 mm. This can lead to difficulties in older coke oven batteries because the available height for extinguishing containers is limited there. - Δ-.

For the rest, the side wall pivotally attached to the box below the known extinguishing container naturally has surfaces which have to be sealed separately and which can lead to leakages at high steam pressures.

DE-OS 29 29 385 also specifies an extinguishing container in which heated coke lies on a grate and is treated with extinguishing liquid from above. The steam formed emerges from the side of the extinguishing container at the bottom.

US Pat. No. 2,250,262 shows a laterally unloadable container with a saddle bottom. The aim of the floor arrangement, which is inclined on two sides, is intended on the one hand the impact and thus the breaking of bulk material, e.g. of coke, if it falls into the container from a greater height. On the other hand, the slope of the bottom should also accelerate the emptying of the container. The publication does not refer to the extinguishing of coke.

The invention is based on the object of specifying a coke extinguishing device in which, on the one hand, the gases formed during the extinguishing, e.g. Water vapor flows through the coke fill evenly without creating areas with very different temperatures. These gases should also be able to be collected and cleaned for further use after they have passed through the coke bed.

On the other hand, the parts of the device 'should be designed so that they the mechanical, thermal and chemical loads, for example the loads mentioned above under _ a) to f), can withstand sufficient even after numerous extinguishing cycles, ie have a long service life and can be renewed easily and quickly if necessary.

_Q The facility should also, especially at a

Use on older type coke oven batteries, which allow the maximum bed height of the coke to be used.

This object is achieved according to the invention in that in the lower area of the coke extinguishing container there are outlet openings for the gases resulting from the extinguishing and at least one discharge pipe in each case in at least two mutually opposite walls, each of which has a clear cross section Restraint extends.

Various advantages result from the invention.

The device according to the invention, in particular the retaining elements in the discharge lines for the gases produced during the extinguishing, have a particularly long service life because at least the mechanical and thermal loads on the retaining elements are significantly reduced. Thus, on the one hand, there is no impact on the restraining member when the extinguishing container is charged with coke. On the other hand, the weight of the coke bed does not rest on the retaining element. This can also be arranged in such a way that it does not come into direct contact with the very hot, not yet extinguished coke. In addition, the arrangement of the retention members in the discharge lines for the gases produced during extinguishing enables them to be replaced quickly without long interruptions in operation.

It is of particular importance that due to the lateral attachment of the retaining elements in the extinguishing container, the height of the coke bed in this container can extend further downward, thus increasing the usable volume. In the device according to the invention, the. Gases can be obtained from the extinguishing container at an additional height of approximately 600 mm for the coke fill in the container. This is particularly important when using the extinguishing container in the form of a single-point container car and when receiving coke to be extinguished from oven batteries of various, in particular older, designs. In addition to the better possibilities for using the device, there are also lower construction costs for the extinguishing container.

According to an advantageous development of the invention, the bottom of the extinguishing container is designed as a closed deflecting bottom. This shape of the base is particularly well adapted to the streamlines of the extinguishing medium in the coke bed and ensures a uniform cooling of the coke.

According to another embodiment of the invention, the deflecting base is perforated and combined with an underlying gas collection space, which is connected via partial lines to the leads leading to gas cleaners. -This ensures that the directly on the The extinguishing medium flows well around the coke layer lying on the deflection floor and is thus cooled uniformly.

The retention members in the discharge lines of the extinguishing container are preferably adjustable to change the clear cross section of the discharge lines. This is favorable for the optimization of the extinguishing process, because it means the ratio of the partial flows of the extinguishing medium via the retaining element and via the perforated base, depending on e.g. the type of coke, its temperature and its bulk density can be set individually.

The outlet ends are for accelerated discharge of the extinguishing medium from the gas collection space under the perforated baffle. of the associated sub-lines are arranged within the derivatives in which the retaining members are provided. The outlet ends of the partial lines can be designed as injector nozzles.

In a special embodiment, the clear cross section of the discharge lines, which have the retaining members, is reduced in the area of the injector nozzles. This increases the speed of the extinguishing medium flowing around the injector nozzles. The result is a negative pressure in the area around the injector nozzles and an increased suction of gases from these nozzles.

It has been shown that the flow conditions in the extinguishing container lead to a particularly uniform cooling of the coke when the deflecting base is at its highest in the central region of the extinguishing container and from there is sloping symmetrically in the direction of the outlet openings, in the area of which the retaining elements lie . The retaining members are preferably designed as grids. It is advantageous if the main surface of the grate at the beginning or inside the discharge line for the extinguishing medium is arranged perpendicular to the longitudinal direction of this discharge line. This results in the smallest possible dimensions for the grate.

In particular, use is made of a device, the container base of which is designed as a deflecting base, and in each of which a grate as a retaining element lies in the plane of the nearest wall, the extinguishing container. This arrangement of the retaining member is relatively simple to manufacture.

In some cases it is also advantageous if the angle between the main surface of the grating acting as a retaining element and the longitudinal direction of the associated one

Water vapor discharge deviates from 90 °. The inclination of the grate obtained in this way in some cases means that the glowing coke does not touch the grate and thus protects its material mechanically and thermally.

For a more intensive flow of the coke to be cooled in the lower region of the extinguishing container, it is expedient to provide deflection devices on the walls of the extinguishing container above the outlet openings for the extinguishing medium, which deflect the extinguishing medium flowing down these walls towards the central region of the coke bed.

When the glowing coke is poured into the container, the coke is deflected inwards by the deflection devices, so that the grids are not touched by the falling coke.

O PI In order to cool the coke bed evenly over its cross section and not more than the required 5

To use the amount of extinguishing water, it is advantageous to use spray nozzles with different inner diameters at the same time. This allows the Löschbe¬ containers in different areas of firewater _Ω supply the amount of water depending on the

Path length can be set, which is covered by the extinguishing water in the coke bed. For example, more extinguishing water can be applied to the surface of the coke bed in those areas, ₅ of which the path of the extinguishing water through the coke bed is longer than from other areas.

It has also proven advantageous to determine the different extinguishing water supply with the aid of an o different number of spray nozzles per unit area of the extinguishing container lid. Nozzles with the same diameter can be used.

Exemplary embodiments of the coke extinguishing device according to the invention are schematically explained in the drawing:

He show:

Fig. 1 shows a device with a closed

Deflection floor, a grate as a retaining element in the level of the respective fire tank wall and two gas cleaners on a chassis, partly in section; FIG. 2 shows a partial view of an outlet opening at the bottom of an extinguishing container according to FIG. 1, but with a grate inclined downwards towards the center of the container;

3 shows a partial view of an outlet opening according to FIG. 2 with a grate inclined downwards towards the outside of the container;

4 shows a partial view of an outlet opening according to FIG. 2 with a grate in the first straight section of the gas discharge line;

5 shows a partial view of an outlet opening according to FIG. 2 with a grate in the first curved section of the gas discharge line;

Fig. 6 is a partial view of an outlet opening according to

Fig. 2 with a grate in the second straight

Gas discharge section;

Fig. 7 shows the device according to Fig. Λ. additionally with deflection devices over the outlet openings for the extinguishing medium;

Fig. 8 shows a device with a perforated deflecting base, a grate as a retaining element in the plane of the respective container wall and two gas cleaners on a chassis, partly in section. 1 essentially consists of a coke extinguishing container 1 which is closed at the top with a lid 2 and is connected at the bottom via two leads 3 to two gas cleaners 4. The device is arranged on a chassis 5.

A Was5 feed line 6 branches at its end 7 into sub-lines 8, each of which is connected to a spray nozzle 9 on the underside of the cover 2. The lid 2 closes the coke extinguishing container 1 in a gas-tight manner with the aid of seals 10.

The container 1 filled with the coke bed 11 has a base 12 in the form of a deflecting base. This extends on both sides of its apex 13 arranged in the middle of the container 1 essentially obliquely downwards in the direction of two outlet openings 14 in two walls 15 of the container 1 lying opposite one another. The flanks of the bottom 12 on both sides of the apex 13 are aerodynamically favorable arched down. However, the curvature is not absolutely necessary.

At the two outlet openings 14, a retaining member 16 is arranged in the form of a grate in the plane of the nearest wall 15 of the container 1.

At the outlet openings 14 each has a relatively short horizontal section 17 of the

Lead 3 on. The continuation of the derivations 3 each forms an upwardly curved section 18 which merges into a relatively long vertical section 19.

CMPI_ The discharges 3 are connected via flanges 20 and seals 21 to feed lines 22, which also run vertically, to the gas cleaners 4. These are equipped with sliders 23 for dust removal. In addition, 4 derivatives 24 for the cleaned gas are provided on the gas cleaners. 1, 7 and 8, the gas cleaners 4 are shown as cyclones.

The device lies for its transport to the individual coke oven chambers on the chassis 5, which can be moved via wheels 25 on a track parallel to the coke oven battery.

FIGS. 2 to 6 show further expedient configurations for the arrangement of the retaining members 16 in the form of grids.

2, the grate is arranged directly at the outlet opening 14 and obliquely downwards towards the center of the container 1.

3, the grate is also attached directly to the outlet opening 14, but obliquely downwards to the outside of the container 1.

4 to 6, the grate is arranged perpendicular to the longitudinal direction of the discharge line 3. It is located either in the relatively short horizontal section 17 (FIG. 4), in the upwardly curved section 18 (FIG. 5) or at the beginning of the relatively long vertical section 19 (FIG. 6) of the derivative 3. The further the grate in the discharge line 3 is removed from the outlet opening 14, the less there is a risk that the grate will come into contact with the glowing coke and thus be mechanically and thermally stressed.

Of course the grate can also be at other locations and in ^"other plies in the area of Auslaß¬ opening be 14 is arranged. The grate consists for example of individual grate rods or for grate plates. It is preferably mounted so that it can be replaced from the outside, without must be entered into the interior of the container 1.

FIG. 7 shows a further development of the device according to FIG. 1. Deflection devices 26 are additionally provided above the outlet openings 14. The deflection devices 26 direct the downward flow of the extinguishing medium away from the outlet openings 14 and towards the center of the coke bed in the region of the walls 15. As a result, the flow path of the extinguishing medium in the region of the walls 15 is lengthened and therefore the heat absorption of this medium is increased. In addition, when the container is loaded, the coke falling down is deflected by the deflection device 26 from the retaining element 16, which is thus relatively impact-protected.

8 has a bottom 12 which is perforated. The openings 27 of the perforation connect the space in which the coke bed 11 lies in the extinguishing container 1 with a gas collection space 28 below the floor 12. From the bottom of the gas collection space 28, a discharge line 29 leads downward, which is divided into two Sub lines 30 passes. The sub-lines 30 extend in a horizontal plane below the coke extinguishing

PI container in opposite directions up to approximately the longitudinal axis of the respectively associated, relatively long vertical section 19 of the lead 3. In the area of the longitudinal axis of this section 19, the sub-lines 30 are each inserted at right angles upwards into the inside of the lead 3. The sections of the partial lines 30 located within the derivatives 3 are arranged approximately coaxially with the section 19. The outlet ends 31 of the partial lines 30 within the sections 19 are tapered in the form of injector nozzles.

To improve the ector effect, the clear cross section of the leads 3 in the area of the outlet ends 31 can be reduced.

To use it, the device according to FIG. 1 is moved in front of the coke oven chamber to be emptied. When the lid 2 is open, the extinguishing container 1 is filled with the glowing coke. After closing the lid 2, the coke bed 11 is sprayed with water via the nozzles 9. The water cools the coke by means of heat extraction, whereby water vapor and possibly other gases, eg water gas, are formed. The resulting gases flow downward through the coke bed 11 to the outlet openings 14 with further heat absorption. If the base 12 is designed as a deflecting base, it supports a favorable flow direction of the cooling gases. In the area of the outlet opening 14, the hot gases from the container 1 pass through the retaining members 16, by which larger coke particles are retained. - -

The gases then reach the gas cleaners 4 via the discharge lines 3, where the gases are cleaned 5 and leave the gas cleaners 4 via the discharge lines 24 for further thermal and / or chemical use.

When using the device according to FIG. 8, it is first moved in front of the coke oven chamber to be emptied. When the lid 2 is open, the extinguishing container 1 is filled with the glowing coke. After closing the lid 2, the coke bed 11 is sprayed with water via the nozzles 9. The water - ^l *** - ^* cools the coke by removing heat, whereby water vapor and possibly other gases, eg water gas, are formed. The resulting gases flow downward through the coke bed 11 while absorbing further heat.

0 The greater part of the gases leaves the extinguishing container 1 via the outlet openings 14, the downwardly curved shape of the deflecting base favoring the formation of a uniform gas flow. In the area of the outlet opening 14, the hot gases pass through the grids, from which larger coke particles which may be entrained are retained. The gases then reach the gas cleaners 4 via the discharge lines 3.

At the same time, a smaller part of the gases formed in the extinguishing container 1 flows through the openings 27 of the base 12 into the gas collection space 28. From there, the gases pass through the exhaust line 29, the two partial lines 30 and their outlet ends 31 into the derivatives 3, where the aforementioned 5 larger partial flow of the gases is combined with the smaller partial flow from the partial line 30.

OMPI The generation of a smaller partial flow through the perforated base 12 has the advantage that the coke layer lying directly on the base 12 is completely flowed through by the gases and cooled. As a result, the bottom layer of the coke bed is cooled as well as the upper regions thereof.

The partial flow exiting through the grids results in a suction effect in the area around the outlet ends 31 of the partial lines 30. As a result, the smaller partial flow of the gases penetrating the perforated floor 12 below the floor 12 is rapidly discharged via the outlet ends 31. This suction effect can be reinforced by a cross-sectional tapering of the discharge line 3 in the region of the outlet ends 31.

Alternatively, the clear cross-section of the leads 3 can be changed with the aid of adjustable retention members 16 during coke quenching. As a result, the quantity ratio of the partial flows exiting via the retention members 16 to the partial flow running through the perforated base 12 can be regulated. For example, In the initial phase of the extinguishing, the partial flow leading through the base 12 can be strengthened by reducing the passage area on the retaining elements 16 and in the subsequent phase can be weakened in the reverse manner.

If necessary, the partial flow can be completely interrupted via the retaining elements 16 during any extinguishing phase. In this case, the partial lines 30 no longer function as bypass lines, but instead temporarily absorb the entire gas flow. The retention members 16 can thus also act as valves. For this purpose, they can be provided, for example, with lamella-like flaps, whose inclination can be changed or closed in order to restrict or interrupt the gas flow. Instead of the flaps, a slide can also be provided, with which the clear cross section of the derivative 3 can be reduced as desired.

OMPI

Claims

- 18 -

P a t e n t a n s r u c h e

Coke extinguishing device with a coke extinguishing container (1) which has walls (15), a bottom (12), a cover (2) with spray nozzles (9) on the underside of the cover and an outlet opening (14) for gases produced during the extinguishing characterized in that in the lower area of the ^" coke extinguishing container (1) in at least two mutually opposite walls (15) outlet openings (14) - and then in each case a discharge line (3) are provided, each of which has a retaining member over its light cross section (16) extends •

2. Coke quenching device with an inclined bottom (12) of the container (1) according to claim 1, characterized in that ^' the bottom (12) is formed as a closed deflecting bottom.

^* ξυs.E

OMPI

3. coke extinguishing device with an inclined bottom (12) of the container (1) according to claim 1, characterized gekenn¬ characterized in that the bottom (12) is designed as a perforated deflecting bottom and an underlying gas collection space (28) via sub-lines (30) with the derivatives (3) is connected.

4. coke extinguishing device according to claim 3, characterized in that the retaining members (16) for changing the clear cross section of the Ab¬ lines (3) are adjustable.

5. Coke extinguishing device according to claim 3 or 4, characterized in that the outlet ends (31) of the partial lines (30) are provided within the derivatives (3) and are designed as injector nozzles. -

6. coke extinguishing device according to claim 5, characterized in that the clear cross section of the derivatives (3) is reduced in the area around the outlet ends (31).

7. coke extinguishing device according to one of claims 2 to 6, characterized in that in the Seitenan¬ view of the coke extinguishing container (1) the bottom (12) in the central region of the container (1) is highest and from there symmetrically in the direction of the Auslaß¬ openings (14) is sloping.

8. Coke extinguishing device according to one of the preceding claims, characterized in that the retaining members (16) are designed as grids.

OMPI

9. coke extinguishing device according to claim 8, characterized in that in each case the main surface of the grate is arranged perpendicular to the longitudinal direction of the associated derivative (3).

10 .. coke extinguishing device according to claim 9, characterized in that the grids each in the plane of the nearest wall (15) of the Be¬

10 halters (1) are arranged.

11. Coke extinguishing device according to claim 8, characterized in that in each case the angle between the main surface of the grate and the longitudinal

- 15 direction of the associated derivative (3) from

Deviates 90 °.

12. Coke extinguishing device according to one of the preceding claims, characterized in that the

20 outlet openings (14) on the walls (15) towards the center of the container (1) pointing deflectors (26) are provided.

13. Coke quenching device according to one of the preceding

25 claims, characterized in that the spray nozzles (9) have different inside diameters.

14. Coke quenching device according to one of the preceding

30 claims, characterized in that the number of spray nozzles (9) per unit area of the cover (2) is different.

35

OMPI