Shut-off valve, coking drum and method

Abstract

This disclosure relates to a shut-off valve, in particular a pipe-bridge slide valve, for a coking drum for the production of coke, having at least one pipe socket which has a first end for connection to the coking drum and a second end on which a slider is arranged for opening and closing the coking drum, wherein the pipe socket has a supply connection for filling the coking drum with a medium and a diaphragm which is arranged between the supply connection and the first end of the pipe socket and can be moved into a filling position and into an emptying position, wherein, in the filling position, a diaphragm opening is arranged in the region of the central longitudinal axis of the pipe socket for introducing the medium centrally into the coking drum, and, in the emptying position, the diaphragm opening has a larger passage area than in the filling position.

Claims

1. A shut-off valve of a coking drum comprising: a pipe socket having a first end for connection to the coking drum and a second end on which a slider is configured and arranged for opening and closing the coking drum; a supply connection included in the pipe socket for filling the coking drum with a medium; and a diaphragm included in the pipe socket configured and arranged between the supply connection and the first end of the pipe socket, wherein the diaphragm is movable into a filling position and into an emptying position, wherein, in the filling position, a diaphragm opening is arranged in a region of a central longitudinal axis of the pipe socket for introducing the medium centrally into the coking drum, and wherein, in the emptying position, the diaphragm opening has a larger passage area than in the filling position.

2. The shut-off valve of claim 1, wherein the supply connection is arranged in a wall of the pipe socket and opens into a space of the pipe socket between the slider and the diaphragm.

3. The shut-off valve of claim 1, wherein the diaphragm further comprises a slide valve with a split slide plate, wherein partial plates of the split slide plate are movable in opposite directions and in the filling position to form the diaphragm opening in the region of the central longitudinal axis for introducing the medium centrally into the coking drum.

4. The shut-off valve of claim 3, wherein each partial plate is connected to a slide rod to move the partial plates in opposite directions.

5. The shut-off valve of claim 3, wherein the partial plates have inner edges, which form the diaphragm opening in the filling position.

6. The shut-off valve of claim 5, wherein the inner edges are straight and form a gap-like diaphragm opening in the filling position.

7. The shut-off valve of claim 5, wherein at least one of the inner edges is profiled and, in the filling position, form the diaphragm opening which is curved at least in some sections.

8. The shut-off valve of claim 7, wherein the diaphragm opening forms a closed circumference in the filling position.

9. The shut-off of claim 7, wherein at least one of the inner edges forms a concave recess.

10. The shut-off valve of claim 7, wherein the partial plates are movable over each other in a region of the inner edges.

11. The shut-off valve of claim 1, wherein the diaphragm forms a plate with at least one of first or second diaphragm openings, wherein the plate is movable into the filling position and into the emptying position, wherein, in the filling position, the first diaphragm opening is configured and arranged in the region of the central longitudinal axis of the pipe socket for introducing the medium centrally into the coking drum and, wherein in the emptying position, the second diaphragm opening is arranged in the region of the central longitudinal axis of the pipe socket for emptying the coking drum and has a larger passage area than the first diaphragm opening.

12. A shut-off valve of a coking drum comprising: a pipe socket having a first end for connection to the coking drum and a second end on which a slider is configured and arranged for opening and closing the coking drum; a supply connection included in the pipe socket for filling the coking drum with a medium; and a diaphragm included in the pipe socket configured and arranged between the supply connection and the first end of the pipe socket, wherein the diaphragm is movable into a filling position and into an emptying position, wherein, in the filling position, a diaphragm opening is arranged in a region of a central longitudinal axis of the pipe socket for introducing the medium centrally into the coking drum, wherein, in the emptying position, the diaphragm opening has a larger passage area than in the filling position, and wherein a volume flow of the medium when filling the coking drum is controllable by changing the diaphragm opening.

13. The shut-off valve of claim 12, wherein the passage area of the diaphragm opening when emptying the coking drum corresponds substantially to a passage area of the pipe socket.

14. The shut-off valve of claim 12, wherein the supply connection is arranged in a wall of the pipe socket and opens into a space of the pipe socket between the slider and the diaphragm.

15. The shut-off valve of claim 12, wherein the diaphragm further comprises a slide valve with a split slide plate, wherein partial plates of the split slide plate are movable in opposite directions and in the filling position form the diaphragm opening in the region of the central longitudinal axis for introducing the medium centrally into the coking drum.

16. The shut-off valve of claim 15, wherein each partial plate is connected to a slide rod to move the partial plates in opposite directions.

17. The shut-off valve of claim 15, wherein the partial plates have inner edges, which form the diaphragm opening in the filling position.

18. A method for producing coke in a coking drum connected to a shut-off valve, the method comprising: providing a pipe socket having a first end for connection to the coking drum and a second end on which a slider is configured and arranged for opening and closing the coking drum; providing a supply connection included in the pipe socket for filling the coking drum with a medium; providing a diaphragm included in the pipe socket configured and arranged between the supply connection and the first end of the pipe socket, wherein the diaphragm is movable into a filling position and into an emptying position, wherein, in the filling position, a diaphragm opening is arranged in a region of a central longitudinal axis of the pipe socket for introducing the medium centrally into the coking drum; wherein, in the emptying position, the diaphragm opening has a larger passage area than in the filling position; filing the coking drum with the medium; and moving the diaphragm into the filling position, wherein the medium is fed though the supply connection into the pipe socket and through the diaphragm into the coking drum centrally with respect to the coking drum.

19. The method of claim 18, wherein a volume flow of the medium into the coking drum is changed by the diaphragm.

20. The method of claim 18, wherein the diaphragm is moved into the emptying position for emptying the coking drum.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) In the drawings

(2) FIG. 1 shows a sectional view of a shut-off valve according to an exemplary embodiment according to the invention, which is connected to a coking drum;

(3) FIG. 2 shows a plan view of a diaphragm with profiled partial plates;

(4) FIG. 3 shows a sectional view of a diaphragm with partial panels arranged one above the other;

(5) FIG. 4 shows a sectional view of a diaphragm with fork-shaped partial plates; and

(6) FIG. 5 shows a plan view of a diaphragm with a continuous plate and 2 diaphragm openings.

DESCRIPTION

(7) The shut-off valve shown in FIG. 1 is connected to a coking drum 21 or coking chamber. The shut-off valve is disclosed and claimed both by itself, i.e. without coking drum 21, and in the installed state with coking drum 21. As shown in FIG. 1, the outlet opening of the coking drum 21 is connected, in particular screwed, to a first end of the pipe socket 10 of the shut-off valve. The second end 12 of the pipe socket 10 is connected to a slider 13, which is provided for opening and closing the coking drum 21. The further pipe socket usually provided on the other side of the slider 13 is not shown.

(8) As shown in FIG. 1, in the installed state the first end 11 of the pipe socket 10 is arranged at the top and the second end 12 at the bottom in the vertical direction.

(9) The pipe socket 10 is cylindrical. Other cross-sectional shapes are possible.

(10) The coking drum and the shut-off valve are aligned in a direction along the central longitudinal axis L, which runs longitudinally in the middle or centrally through the coking drum 21 and the pipe socket 10.

(11) The shut-off valve according to FIG. 1 is designed as a pipe-bridge slide valve. The slider 13 of the shut-off valve is designed as a double-plate slider. Such double-plate sliders are known. Other sliders, for example single-plate sliders, can also be used. The slider 13 closes the coking drum in the operating state. The slider 13 can also be referred to as the main slider or shut-off slider.

(12) The pipe socket 10 has a supply connection 14, which is connected to the wall 17 of the pipe socket. The supply connection 14 can, for example, be designed as a nozzle to which a pipe is connected. The supply connection 14 serves to introduce the medium intended for filling the coking drum into the pipe socket 10. Possible media are, for example, crude oil or residues from vacuum distillation.

(13) A diaphragm 15 is arranged between the supply connection 14 and the first, upper end 11 of the pipe socket 10. The diaphragm 15 covers the entire cross-sectional area of the pipe socket 10.

(14) The diaphragm 15 can be moved into a filling position and into an emptying position. FIG. 1 additionally shows a third position, in which the diaphragm 15 is completely closed (closed position). In the filling position, the diaphragm is partially open, more specifically to such an extent that a diaphragm opening results in the region of the central longitudinal axis L of the pipe socket 10. The diaphragm opening is large enough to allow the medium introduced through the supply connection 14 to flow into the coking drum 21. Specifically, the medium flows into a space 18 of the pipe socket 10 formed between the slider 13 and the diaphragm 15 in the pipe socket 10. The supply connection 14 opens out into this space 18.

(15) The diaphragm opening is positioned in the region of the central longitudinal axis L of the coking drum or the pipe socket 10. Here, the diaphragm opening can be arranged symmetrically to the central longitudinal axis L so that it passes through the centre of the diaphragm opening. Deviations from this position are acceptable as long as the central supply of the medium into the coking drum 21 is enabled.

(16) To empty the coking drum 21, the diaphragm 15 is fully opened. The passage area of the diaphragm is therefore larger in the emptying position than the passage area of the diaphragm in the filling position. In the emptying position, the pipe socket 10 is released, in particular completely released, to such an extent that the coke located in the coking drum 21 can be removed. For this purpose, it may be necessary to insert a cutting tool into the outlet opening of the coking drum, which is easily possible when the diaphragm 15 is fully open.

(17) As shown in FIG. 1 to 4, the diaphragm 15 is designed as a slider valve with a split slide plate 16. The slide plate 16 is composed of at least two partial plates 16a, 16b, which can be moved in opposite directions. As shown in FIG. 1, the partial plates 16a, 16b are moved radially outwards in relation to the central longitudinal axis L to open the diaphragm 15 and radially inwards to close the diaphragm 15. For the filling process, the partial plates 16a, 16b are not completely closed as shown in FIG. 1, but are partially closed so that the diaphragm opening is formed between the partial plates 16a, 16b.

(18) The partial plates 16a, 16b can be moved in such a way that, in the filling position, they form the diaphragm opening in the region of the central longitudinal axis L, so that the medium can be introduced centrally through the diaphragm 15 into the coking drum 21.

(19) As can be clearly seen in FIGS. 1, 3 and 4, each partial plate 16a, 16b is connected to its own slide rod 19a, 19b so as to be able to move the partial plates 16a, 16b in opposite directions towards or away from each other. The partial plates 16a, 16b are guided or arranged in housing extensions 22a, 22b, which are radially arranged on the pipe socket 10. The first housing attachment 22a receives the first partial plate 16a (left partial plate in FIG. 1) and the second housing attachment 22b receives the second partial plate 16b (right partial plate in FIG. 1).

(20) The two partial plates 16a, 16b each form inner edges 20. The inner edges 20 delimit the partial plates 16a, 16b on the one hand and the diaphragm on the other hand when the partial plates 16a, 16b are partially open.

(21) There are various possibilities for the design of the inner plates 16a, 16b.

(22) The inner edges 16a, 16b can be straight (not shown in FIG. 1). If the diameter is circular, the partial plates 16a, 16b form semi-circles. The inner edges 16a, 16b run through the centre of the circular split slide plate 16 as shown in FIG. 1. In the closed position shown in FIG. 1, the inner edges 20 are butted against each other. If the inner edges are slightly moved apart in the filling position, they form a slot-like or slit-like diaphragm opening, the width of which is such that a sufficiently large volume flow of the medium for filling the coking drum 21 can pass through the diaphragm 15. The slit-like diaphragm opening is positioned so that the central longitudinal axis L passes through it. During filling, the medium flows through the slit-like diaphragm opening into the coking drum 21.

(23) In the variant according to FIG. 2, the inner edges 20 are profiled. It is also possible that one inner edge is straight and the other inner edge is profiled. In the filling position, the inner edges 20 form a diaphragm opening that is curved at least in some sections. For this purpose, the two inner edges 20 have concave recesses that are arranged symmetrically and together form the diaphragm opening.

(24) FIG. 2 shows an intermediate position, in which the partial plates 16a, 16b are moved from the filling position into the emptying position, i.e. away from each other. In the filling position, the two partial plates 16a, 16b are arranged so close to each other that the diaphragm opening is formed by the two recesses.

(25) This can be done by arranging the two partial plates 16a, 16b in different planes and thus moving them over each other, as shown in FIG. 3. As a result, the partial plates 16a, 16b partially overlap, at least at the edges, so that the diaphragm opening is formed by the two recesses or the profiled inner edges 20. The diaphragm opening is therefore completely closed on the circumference so that the medium is concentrated to the region around the central longitudinal axis L.

(26) The diaphragm opening is oval in the exemplary embodiment according to FIG. 2. Other contours, for example circular diaphragm openings, are possible. The possibility of moving the two partial plates 16a, 16b one above the other and relative to each other has the further advantage that the size of the diaphragm opening can be varied. This allows the volume flow through the diaphragm into the coking drum to be controlled.

(27) Alternatively to the arrangement of the two partial plates 16a, 16b as shown in FIG. 3, it is also possible to form one of the two partial plates 16a, 16b in a fork-shaped design, as shown in FIG. 4. The cross-sectionally fork-shaped design of the two partial plates 16a, 16b creates a gap between the partial plates 16a, 16b, into which gap the other partial plate 16a, 16b can enter in order to achieve the overlapping of the partial plates 16a, 16b and thus the delimitation and modification of the diaphragm.

(28) To empty the coking drum 21, the partial plates 16a, 16b are moved apart completely radially outwards, so that the entire cross-sectional area of the pipe socket is exposed.

(29) Another variant of the diaphragm for the shut-off valve is shown in FIG. 5. In contrast to the previous exemplary embodiments, the diaphragm 15 is designed as a continuous, i.e. not split, plate. The change in diaphragm opening is made possible by the plate having two diaphragm openings, a first diaphragm opening 23a and a second diaphragm opening 23b. The two diaphragm openings 23a, 23b are arranged one behind the other in the direction of movement of the plate. This ensures that either the first or the second diaphragm 23a, 23b can be moved into the pipe socket, more specifically in such a way that the centre of the particular diaphragm 23a, 23b approximately coincides with the central longitudinal axis L of the pipe socket 10. The diaphragm openings 23a, 23b are thus arranged coaxially with the pipe socket 10 in the respective position. The smaller diaphragm opening 23a is used for central filling of the coking drum 21. The larger diaphragm opening 23b is used for emptying the coking drum. This provides a very simple way to achieve filling of the coking drum through the centre of the pipe socket on the one hand, whilst not interfering with emptying of the coking drum through the diaphragm on the other hand, since the diaphragm opening with the larger diameter is used for emptying. 10 pipe sockets 11 first end 12 second end 13 slider 14 supply connection 15 diaphragm 16a first partial plate 16b second partial plate 17 wall 18 pipe socket space 19a first slide rod 19b second slide rod 20 inner edges 21 coking drum 22a first housing attachment 22b second housing attachment 23a first diaphragm opening 23b second diaphragm opening