Valve for shutting off a stream of bulk material in a lock arrangement

Abstract

The present invention relates to a valve (1) for shutting off a stream (2) of bulk material in a lock arrangement (100), comprising a valve body (10) which is configured to be fastened in the lock arrangement (100), a piston rod (20) having a fastening flange (23), wherein the piston rod (20) extends along a longitudinal axis (X-X) from a first end (21) to a second end (22), a tubular first diaphragm (31) which surrounds the piston rod (20) radially with respect to the longitudinal axis (X-X), and a first actuator (41) which is located in the valve body (10) and configured to move the piston rod (20) along the longitudinal axis (X-X), wherein the first end (21) of the piston rod (20) is located on the first actuator (41) and the fastening flange (23) is located on a side facing away from the flow outside of the valve body (10), wherein the first diaphragm (31) is located on the valve body (10) and the fastening flange (23) and configured to shut off the stream (2) of bulk material in the lock arrangement (100) by a movement of the piston rod (20) toward the valve body (10).

Description

[0001] R.416829

[0002] Description

[0003] title

[0004] Valve for

[0005]

[0006] one

[0007]

[0008] in one

[0009]

[0010] State of the art

[0011] The present invention relates to a valve for shutting off a bulk material flow in a lock assembly, the lock assembly with the valve, as well as a desorption section and a gas separation system with the valve.

[0012] In many process plants, a granular working fluid is conveyed as bulk material. This bulk material is often fed to and discharged from various process steps as a single unit using rotary valve technology. Different absolute pressures and gas compositions can prevail in or between the respective process chambers. Due to the driving pressure differential between the process chambers, the rotary valves must therefore meet corresponding tightness requirements to ensure that no or minimal gas exchange occurs between the process chambers, so that the work processes are not negatively affected. Common technologies for such rotary valves include, for example, gate valves, roller valves, butterfly valves, and rotary valves. The valve must fulfill two main requirements: firstly, to reliably shut off the bulk material, and secondly, to seal the flow as gas-tight as possible.A desirable valve is one that, with a simple design and a small number of moving parts, reliably shuts off the flow of bulk material.

[0013] Disclosure of the invention

[0014] The valve according to the invention for shutting off a bulk material flow with the features of claim 1 and the associated lock arrangement with R.416829

[0015] -2 -

[0016] The features of claim 12, the desorption section with the features of claim 13 and the gas separation system with the features of claim 15 have the advantage that a reliable shut-off of a bulk material flow is made possible with a simple and cost-effective design and a small number of moving parts.

[0017] According to the invention, this is achieved by the valve comprising a valve body, a piston rod, a tubular first diaphragm, and a first actuator. The valve body is designed to be mounted in the lock assembly. The piston rod has a mounting flange and extends along its longitudinal axis from a first end to a second end. The tubular first diaphragm surrounds the piston rod radially to its longitudinal axis. The first actuator is located in the valve body and is designed to move the piston rod along its longitudinal axis. The first end of the piston rod is located at the first actuator, and the mounting flange is located on a side facing away from the flow, outside the valve body.Furthermore, the first diaphragm is arranged on the valve body and the mounting flange and configured to shut off the bulk material flow in the airlock assembly by moving the piston rod towards the valve body. Thus, a simple and cost-effective valve can be provided which can reliably shut off a bulk material flow in an airlock assembly by means of the first diaphragm. Furthermore, the valve can create a gas-tight seal over the bulk material flow in the airlock assembly, so that no or minimal gas exchange can occur through the valve. The first diaphragm is made of an elastic material, preferably an elastomer. Therefore, the valve can be arranged in an airlock assembly, whereby a movement of the piston rod moves the attached first diaphragm radially outwards towards the airlock assembly.The membrane is moved along a lock wall to block off the flow of bulk material within the lock assembly and to seal the lock assembly. In particular, the membrane can be used to block off the flow of bulk material against a pipeline within the lock assembly.

[0018] The dependent claims describe preferred embodiments of the invention. R.416829

[0019] - 3 -

[0020] Preferably, the valve body has a conical tip on a flow-facing side. This conical tip allows the bulk material flow to be efficiently guided around the open valve, thereby reducing the forces exerted on the valve by the bulk material flow.

[0021] According to the invention, the side facing the flow is oriented towards the incoming bulk material flow. A side facing away from the flow is oriented away from the incoming bulk material flow.

[0022] Preferably, the first actuator is fluid-operated, with the valve body having a first fluid line for controlling the first actuator. In particular, the first actuator is a hydraulic or pneumatic actuator. Fluid-operated actuators can reliably generate high forces in a small space to more reliably close the lock assembly.

[0023] Preferably, a first piston is arranged at the first end of the piston rod, which is located in a fluid-operated first working cylinder. The first working cylinder has a first control chamber on the side of the first piston facing away from the flow and a first relief chamber on the side facing the flow. The first control chamber is connected to the first fluid line. Thus, by introducing a fluid into the control chamber through the first fluid line, the piston rod can be moved simply and reliably towards the relief chamber, thereby compressing the first diaphragm to close the lock assembly.

[0024] The valve body preferably has a second fluid line connected to the relief chamber. Thus, fluid can be discharged from the relief chamber through the second fluid line when fluid is introduced into the first control chamber through the first fluid line. Furthermore, fluid can be actively introduced into the first relief chamber through the second fluid line to move the piston rod towards the control chamber.

[0025] Preferably, the valve comprises a first return spring arranged radially within the first diaphragm between the mounting flange and the valve body to exert a return force on the piston rod.

[0026] This means it is sufficient if the first actuator only applies a force to an R.416829

[0027] - 4 -

[0028] can exert a force in the opposite direction on the piston rod, with the return spring exerting a force in the opposite direction on the piston rod to move the piston rod into a home position.

[0029] Preferably, the valve includes a stroke stop that limits the maximum movement of the piston rod. The stroke stop can limit the movement of the piston rod in the open and / or closed position of the valve. This allows for simple control of the valve.

[0030] According to a further preferred embodiment of the invention, the valve comprises a second diaphragm and a movable valve base with a second actuator. The second end of the piston rod is arranged in the valve base. The second diaphragm is attached to the valve base and the mounting flange, with the second actuator being configured to move the valve base along its longitudinal axis toward the valve body in order to shut off the airlock assembly by means of the second diaphragm. The first and second diaphragms allow the functions of the valve to be spatially separated, so that, for example, the first diaphragm can shut off the flow of bulk material and the second diaphragm can create a gas-tight seal for the airlock assembly. The second diaphragm can be protected from the influence of the flowing bulk material by the first diaphragm.

[0031] Preferably, the valve includes a second return spring arranged radially within the second diaphragm between the mounting flange and the valve base to exert a return force on the valve base. This ensures that the valve base reliably returns to its initial position when the second actuator does not exert any force on the valve base. The initial position can be in either the open or closed state of the valve.

[0032] Preferably, the second return spring has a greater preload force than the first return spring. This ensures that, upon initial actuation of the valve, the first diaphragm closes the lock assembly before the second diaphragm, so that the bulk material flow can be shut off first by the first diaphragm and the second diaphragm R.416829

[0033] -5 -

[0034] subsequently, the lock assembly can be reliably sealed gas-tight without a flow of bulk material passing by.

[0035] The second actuator is preferably fluid-operated, with at least a third fluid line connecting the valve housing to the second actuator via the piston rod. This enables a space-saving, efficient, and cost-effective control of the valve.

[0036] Preferably, a second piston is arranged at the second end of the piston rod, which is located in a fluid-operated second working cylinder. This second working cylinder has a second control chamber on the flow-facing side of the first piston and a second relief chamber on the downstream side of the second piston. A third fluid line connects the first control chamber to the second control chamber. A fourth fluid line in the piston rod connects the first relief chamber to the second relief chamber. Thus, the first fluid line reliably controls both the first and second working cylinders, enabling the valve to shut off the bulk material flow in the lock assembly and create a gas-tight seal.

[0037] Furthermore, the invention relates to a lock assembly comprising a first section, a second section, and a valve as previously described. The first section and the second section are connected by the valve to shut off the flow of bulk material from the first section to the second section. In particular, the lock assembly can use the valve to create a gas-tight seal between the first section and the second section. Thus, the valve enables a reliable seal of the lock assembly with a simple design. The first section and the second section are preferably formed by a pipeline.

[0038] Furthermore, the invention relates to a desorption section comprising a previously described airlock arrangement and a process chamber for the desorption of a gas adsorbed on an adsorbent at a defined temperature and pressure. The airlock arrangement ensures that the defined pressure is maintained in the process chamber and that no or minimal gas exchange with the process chamber occurs. R.416829

[0039] - 6 -

[0040] Furthermore, the invention relates to a gas separation system, in particular a CCh separation system, comprising the previously described desorption section and an adsorption section for the adsorption of a gas onto an adsorbent. The adsorbent is, in particular, a bulk material. A reliable seal between the desorption section and the adsorption section can be ensured by means of the valve in the airlock assembly in the desorption section, so that CO2 can be separated simply and reliably. The gas, in particular CO2, is preferably adsorbed from an air stream in the adsorption section and, after the adsorbent has been transported from the adsorption section through the airlock assembly into the desorption section, is desorbed there.

[0041] Brief description of the drawings

[0042] Exemplary embodiments of the invention are described in detail below with reference to the accompanying drawings. The drawing shows:

[0043] Figure 1a shows a schematic view of a lock arrangement with a valve according to a first embodiment of the invention in an open state.

[0044] Figure 1b shows a schematic view of the lock arrangement with the valve according to the first embodiment of the invention in a closing state.

[0045] Figure 1c shows a schematic view of the lock arrangement with the valve according to the first embodiment of the invention in a closed state.

[0046] Figure 2a shows a schematic sectional view of a lock arrangement with a valve according to a second embodiment of the invention in an open state.

[0047] Figure 2b shows a schematic sectional view of the lock arrangement with the valve according to the second embodiment of the invention in a first closing state, R.416829

[0048] - 7 -

[0049] Figure 2c shows a schematic sectional view of the lock arrangement with the valve according to the second embodiment of the invention in a second closing state,

[0050] Figure 2d shows a schematic sectional view of the lock arrangement with the valve according to the second embodiment of the invention in a third closing state,

[0051] Figure 2e shows a schematic sectional view of the lock arrangement with the valve according to the second embodiment of the invention in a closed state, and

[0052] Figure 3 shows a schematic sectional view of a lock arrangement with a valve according to a third embodiment of the invention in an open state.

[0053] Embodiments of the invention

[0054] Preferably, all identical components, elements and / or units in all figures are provided with the same reference numerals.

[0055] Below, with reference to Figures 1a to 3, a valve 1 and a lock arrangement 100 for a desorption section in a gas separation plant are described in detail.

[0056] Figure 1a shows the lock assembly 100 with a first section 4 and a second section 5, wherein the first section 4 and the second section 5 are connected by the valve 1 to shut off a bulk material flow 2 in the lock assembly 100.

[0057] The valve 1 is arranged in a pipeline 3 and comprises a valve body 10, a piston rod 20, a first diaphragm 31, and a first actuator 41. The piston rod 20 extends along a longitudinal axis XX from a first end 21 to a second end 22. The first end 21 of the piston rod 20 is located at the first actuator 41. Furthermore, the piston rod 20 has a mounting flange 23, which is located on a side facing away from the flow outside the valve body 10.

[0058] - 8 -

[0059] The first diaphragm 31 is arranged at one end on the valve body 10 and at the other end on the mounting flange 23. By moving the piston rod 20 towards the valve body 10, the bulk material flow 2 in the pipeline 3 can be shut off.

[0060] The valve body 10 is attached to the pipeline 3 via a bridge 16. The bulk material flow 2 can flow along a flow direction R. A conical tip 15 is arranged on one side of the valve body facing the flow direction R.

[0061] The first actuator 41 in the valve body 10 is fluid-operated and can be actuated via a first fluid line 11 in the valve body 10. For this purpose, a first piston 24 is arranged at the first end 21 of the piston rod 20, which is located in a fluid-operated first working cylinder 43. The first working cylinder 43 has a first control chamber 44 on the side of the first piston 24 facing away from the flow and a first relief chamber 45 on the side facing the flow. The first fluid line 11 leads into the first control chamber 44, so that by introducing a fluid into the first control chamber 44, the piston rod 20 can be moved along the longitudinal axis XX against the flow direction R. A second fluid line 12 is connected to the first relief chamber 45, through which a fluid can escape from the first relief chamber 45 when the piston rod 20 moves against the flow direction R.

[0062] At an upper end of the first relief chamber 45, the valve has a stroke stop 6 which limits movement of the piston rod 20 against the flow direction R.

[0063] In the first embodiment, the mounting flange 23 is arranged at the second end 22 of the piston rod 20 and extends perpendicular to the longitudinal axis XX. The valve 1 includes a first return spring 4, which is arranged radially within the first diaphragm 31 between the mounting flange 23 and the valve body 10 to exert a return force on the piston rod 20. The return force of the first return spring 4 acts in the direction of the flow direction R, so that the first diaphragm 31 is stretched and the valve 1 opens the pipeline 3 to the bulk material flow 2.

[0064] - 9 -

[0065] Figure 1b shows the lock assembly 100 with the valve 1 from Figure 1a in the closing state. For this purpose, fluid is introduced into the first control chamber 44 through the first fluid opening 11, causing the pressure in the first control chamber 44 to rise and the piston rod 20 to move against the flow direction R towards the relief chamber 45. The fluid in the relief chamber 45 is then conveyed out of the relief chamber 45 through the second fluid line 12. This conveyance can be active or passive.

[0066] By moving the piston rod 20 against the flow direction R, the distance between the valve body 10 and the mounting flange 23 of the piston rod 20 decreases. This compresses the first diaphragm 31 located between the mounting flange 23 and the valve body 10, causing it to bulge towards the pipe 3. This bulging of the first diaphragm 31 reduces the flow cross-section between the valve 1 and the pipe 3, thus throttling the bulk material flow 2.

[0067] Figure 1c shows the valve 1 according to the first embodiment of the invention in the closed state. In the closed state, the first piston 24 of the piston rod 20 rests against the stroke stop 6 in the first working cylinder 43.

[0068] This results in a minimal distance between the mounting flange 23 and the valve body 10, causing the first diaphragm 31 to be compressed so strongly that it rests against the pipe 3 and shuts off the bulk material flow 2.

[0069] The return spring 4 is also maximally compressed when the valve 1 is closed and exerts a maximum return force on the piston rod 20. When the pressure in the first control chamber 44 is reduced, the return force of the first return spring 4 can move the piston rod in the flow direction along the longitudinal axis XX into an open position.

[0070] Figure 2a shows a lock assembly 100 for a desorption section in a gas separation plant with a valve 1 according to a second embodiment of the invention. The valve 1 according to the second embodiment of the invention is based on the valve 1 according to the first embodiment of the invention and is supplemented by a second diaphragm 32 and a movable valve base 50 with a second actuator 42. (R.416829)

[0071] - 10 -

[0072] The second end 22 of the piston rod 20 is arranged in the valve base 50, and the second diaphragm 32 is attached to the valve base and the mounting flange 23. The second actuator 42 is configured to move the valve base 50 along the longitudinal axis XX towards the valve body 10 in order to shut off the pipeline 3 by means of the second diaphragm 32. The mounting flange 23 is positioned centrally between the first end 21 and the second end 22.

[0073] The second actuator 42 in the valve base 50 is also fluid-operated, with a second piston 25 arranged at the second end 22 of the piston rod 20, which is located in a fluid-operated second working cylinder 46. The second working cylinder 46 has a second control chamber 47 on the flow-facing side of the second piston and a second relief chamber 48 on the side opposite the flow of the second piston 25. The first control chamber 44 is connected to the second control chamber 47 by means of a third fluid line 13 in the piston rod 20. Furthermore, the first relief chamber 45 is connected to the second relief chamber 48 by means of a fourth fluid line in the piston rod 20. Thus, by controlling the first control chamber 24 via the first fluid line 11, the second control chamber 47 can be controlled simultaneously to move the piston rod 20 and the valve foot 50 along the longitudinal axis XX against the flow direction R.Furthermore, fluid can escape from the second relief chamber 48 through the fourth fluid line 14 into the first relief chamber 45 and subsequently through the second fluid line 12.

[0074] A stroke stop 6 is also arranged in the second relief chamber 48 of the second working cylinder 46, which limits the maximum movement of the piston rod 20.

[0075] The valve base 50 has a conical tip on the side facing away from the flow.

[0076] The valve 1 according to the second embodiment has a second return spring 5, which is arranged radially inside the second diaphragm 32 between the mounting flange 23 and the valve base 50 in order to exert a return force on the valve base 50. The second return spring 5 preferably has a greater preload than the first return spring 4. Thus, when the valve 1 is actuated, the first return spring 4R.416829

[0077] - 11 -

[0078] compressed. Figure 2a shows the valve 1 in the open state, with the valve 1 having a maximum length along the longitudinal axis XX.

[0079] Figure 2b shows the valve 1 according to the second embodiment in a first closing state. To close the valve 1, the fluid is introduced into the first control chamber 44 through the first fluid line 11. The fluid can flow from the first control chamber 44 to the second control chamber 47 through the third fluid line 13 in the piston rod 20, which connects the first control chamber 44 and the second control chamber 47. The fluid flowing into the first control chamber 44 exerts a force on the first piston 24 in the direction of the first relief chamber 45. Furthermore, the fluid flowing into the second control chamber 47 exerts a force on the second piston 25 in the direction of the second relief chamber 48.

[0080] Due to the lower preload force of the first return spring 4 compared to the second return spring 5, the force on the first piston 24 is initially greater than the preload force of the first return spring 4. As a result, in Figure 2b, the first piston 24 moves against the flow direction R and compresses the first diaphragm 31. This causes the first diaphragm 31 to expand towards the pipe 3 and reduce the flow cross-section of the bulk material flow 2. The preload force of the second return spring 5 is greater than the force on the second piston 25, so the valve base 50 does not move relative to the piston rod 20, and the second diaphragm 32 remains stretched.

[0081] Figure 2c shows a second closing state of the valve 1 according to the second embodiment of the invention. In Figure 2c, further fluid was introduced through the first fluid line 11 into the first control chamber 44, so that the piston rod 20 moved further against the flow direction R until it reached the stroke stop 6 in the first working cylinder 43. This compressed the first diaphragm 31 to such an extent that it abuts the pipe 3 and prevents a flow of bulk material 2 along the valve 1.

[0082] The preload force of the second return spring 5 remains greater than the force of the second piston 25 in the direction of the second relief chamber 48, so that the second diaphragm 32 remains stretched. R.416829

[0083] - 12 -

[0084] Figure 2d shows the valve 1 according to the second embodiment of the invention in a third closed state. By further introducing a fluid through the first fluid line 11 into the first control chamber 44 and through the third fluid line 13 from the first control chamber 44 into the second control chamber 47, the pressure in the second control chamber could be increased to such an extent that the force of the second piston 25 exceeds the preload force of the second return spring 5 and the valve base 50 moves towards the valve body 10, or the second piston 25 moves towards the second relief chamber 48. Thus, the distance between the valve base 50 and the mounting flange 23 is reduced and the second diaphragm 32 is compressed, causing the second diaphragm to bulge towards the pipe 3.

[0085] Figure 2e shows the valve 1 according to the second embodiment of the invention in the closed state. By introducing the fluid further through the first fluid line 11 into the first control chamber 40 and the second control chamber 47, the valve base 50 has moved so far in the direction of the valve body 10 that the second piston 25 abuts against the stroke stop 6 in the second relief chamber 48 and the valve 1 has a minimum length along the longitudinal axis XX.

[0086] Here, the second diaphragm 32 is also maximally compressed so that it lies flush against the pipe 3 and seals the pipe 3 gas-tight. The sequential sealing by means of the first diaphragm 31 and the second diaphragm 32 prevents the second diaphragm 32 from being affected by the bulk material flow 2 and, for example, prevents bulk material from being trapped between the second diaphragm 32 and the pipe 3. This improves the reliability and tightness of the valve 1.

[0087] Figure 3 shows a lock assembly 100 with a valve 1 according to a third embodiment in the open state. The third embodiment is similar to the second embodiment and differs essentially in the absence of the first return spring 4. To open the valve 1, a fluid must therefore be introduced into the first relief chamber 45 through the second fluid line 12, so that the pressure in the first relief chamber 45 is greater than in the first control chamber 44 and the first piston 24 moves towards the first control chamber 44.

[0088] - 13 -

[0089] In summary, the valve 1 in a lock assembly 100 can reliably seal a first section 7 to a second section in order to shut off a bulk material flow 2. This can enable the reliable operation of gas separation systems that include an adsorption section for the adsorption of a gas onto an adsorbent, where the adsorbent can be conveyed as a bulk material flow 2 along the pipeline 3 into a desorption section with the lock assembly 100. The lock assembly 100 can reliably seal a process chamber in the desorption section, allowing the adsorbent to desorb the adsorbed gas in the process chamber at a defined temperature and pressure.

Claims

R.416829 - 14 - Claims 1. Valve (1) for shutting off a bulk material flow (2) in a lock arrangement (100), comprising a valve body (10) which is designed to be attached in the lock assembly (100), a piston rod (20) with a mounting flange (23), wherein the piston rod (20) extends along a longitudinal axis (XX) from a first end (21) to a second end (22), a tubular first membrane (31) which surrounds the piston rod (20) radially to the longitudinal axis (XX), and a first actuator (41) which is arranged in the valve body (10) and is configured to move the piston rod (20) along the longitudinal axis (XX), wherein the first end (21) of the piston rod (20) is arranged on the first actuator (41) and the mounting flange (23) is arranged on a side facing away from the flow outside the valve body (10), wherein the first diaphragm (31) is arranged on the valve body (10) and the mounting flange (23) and is configured to shut off the bulk material flow (2) in the sluice arrangement (100) by moving the piston rod (20) towards the valve body (10).

2. Valve (1) according to claim 1, wherein the valve body (10) has a conical tip (15) on a flow-facing side.

3. Valve (1) according to one of the preceding claims, wherein the first actuator (41) is fluid-operated and wherein the valve body (10) has a first fluid line (11) to actuate the first actuator (41).

4. Valve (1) according to claim 3, wherein a first piston (24) is arranged at the first end (21) of the piston rod (20), which is arranged in a fluid-operated first working cylinder (43), wherein the first working cylinder R.416829 - 15 - (43) has a first control chamber (44) on the side of the first piston (24) facing away from the flow and a first relief chamber (45) on the side of the first piston (24) facing the flow, wherein the first control chamber (44) is connected to the first fluid line (11).

5. Valve (1) according to claim 4, wherein the valve body (10) has a second fluid line (12) which is connected to the first relief chamber (45).

6. Valve (1) according to one of the preceding claims, comprising a first return spring (4) arranged radially within the first diaphragm (31) between the mounting flange (23) and the valve body (10) to exert a return force on the piston rod (20).

7. Valve (1) according to one of the preceding claims, comprising a stroke stop (6) that limits a maximum movement of the piston rod (20).

8. Valve (1) according to any one of the preceding claims, comprising a second membrane (32) and a movable valve base (50) with a second actuator (42), wherein the second end (22) of the piston rod (20) is arranged in the valve base (50), wherein the second diaphragm (32) is attached to the valve base (50) and the mounting flange (23) and wherein the second actuator (42) is configured to move the valve foot (50) along the longitudinal axis (XX) in the direction of the valve body (10) in order to shut off the lock assembly (100) by means of the second diaphragm (32).

9. Valve (1) according to claim 8, comprising a second return spring (5) arranged radially inside the second diaphragm (32) between the mounting flange (23) and the valve base (50) to exert a return force on the valve base (50).

10. Valve (1) according to claim 9, wherein the second return spring (5) has a greater preload force than the first return spring (4). R.416829 - 16 - 11. Valve (1) according to one of claims 8 to 10, wherein the second actuator (42) is fluid-operated and wherein at least a third fluid line (13) connects the valve housing (10) to the second actuator (42) via the piston rod (20).

12. Valve (1) according to claim 11, wherein a second piston (25) is arranged at the second end (22) of the piston rod (20), which is arranged in a fluid-operated second working cylinder (46), wherein the second working cylinder (26) has a second control chamber (47) on the flow-facing side of the second piston (25) and a second relief chamber (48) on a flow-away side of the second piston (25), wherein the third fluid line (13) connects the first control chamber (44) with the second control chamber (47) and wherein a fourth fluid line (14) in the piston rod (20) connects the first relief chamber (45) with the second relief chamber (48).

13. Valve (1) according to one of the preceding claims, wherein by a movement of the piston rod (2) the first diaphragm (31) and / or second diaphragm (32) attached thereto can be moved radially outwards in the direction of the lock assembly (100) and / or a lock wall (3) in order to shut off the bulk material flow (2) in the lock assembly (100).

14. Lock arrangement (100) comprising a first section (7), a second section (8) and a valve (1) according to one of the preceding claims, wherein the first section (7) and the second section (8) are connected by the valve (1) to shut off a bulk material flow (2) from the first section (7) to the second section (8).

15. Desorption section comprising a lock arrangement (100) according to claim 14 and a process chamber for desorption of a gas adsorbed on an adsorbent at a defined temperature and a defined pressure.

16. Gas separation plant, in particular CCh separation plant, comprising a desorption section according to claim 15 and an R.416829 - 17 - Adsorption section for the adsorption of a gas onto an adsorbent.

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