Variable equipment in gas flow channel

Abstract

To provide equipment in a gas flow channel having a first layer composed of horizontal rod-shaped elements arranged at intervals in a plane transverse to the gas flow direction, and a second layer displaced from the first layer, the elements extending laterally across the gas flow channel.SOLUTION: Provided is equipment designed to be variable because of having a device that moves a second layer relative to a first layer, or a first layer relative to a second layer, from a first operating position to an additional operating position and / or a non-operating position. In this configuration, each layer is moved by being translated parallel to an axis of a gas flow channel, translated perpendicular to the axis of the gas flow channel, and / or tilted. As a result, the equipment can be placed in a non-operating state when not required, thereby enabling particularly efficient operation.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to an installation in a gas flow channel having a first layer and a second layer offset with respect to the first layer, made up of horizontal rod-shaped elements arranged at a distance from each other in a plane transverse to the gas flow direction, said elements extending transversely across the gas flow channel. [Background technology]

[0002] Such equipment has long been used in the field of demisters, primarily as wire mesh, but also as rod or tube coalescers. A limiting droplet size of up to approximately 3 μm can be achieved with these coalescers. The smaller the limiting droplets, the greater their pressure loss. Furthermore, such tube coalescers have also been used in dust scrubbing. In this method, water is continuously supplied to the coalescer.

[0003] The pressure loss of such a tube coalescer can be up to 10 times greater than that of a demister. Therefore, using a continuously operating tube coalescer would result in very high energy consumption, which is not necessary in many cases. Since the corresponding equipment is fixedly positioned in the gas flow channel, equipment configured as two layers would have to be automatically "transported," which is not necessary in these cases. Therefore, if such equipment is needed, it makes sense to only perform its function if, for example, dust loads occur in the gas flow (exhaust).

[0004] German Utility Model Application No. 202011004282U1 discloses a service-optimizing demister for a flue gas desulfurization system with tubular impactors, in which at least one roller module is foldably suspended per separator channel. These measures facilitate inspection and maintenance of the roller separators. In other words, the tube separators can be folded into their non-operating position. For inspection and maintenance, a person can carefully fold the module upwards, creating a gap through which a worker can reach the interior of the intermediate space between the two separator layers. There, the worker can carry out inspections or perform work. Moving the corresponding equipment while the system is in operation is not possible. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] German Utility Model Application Publication No. 202011004282U1 Summary of the Invention [Problem to be solved by the invention]

[0006] The object of the invention is to provide an installation of the type mentioned at the outset which can be operated particularly efficiently. [Means for solving the problem]

[0007] According to the invention in an installation of the type shown, this object is solved by providing a device for moving the second layer relative to the first layer, or the first layer relative to the second layer, from a first operating position to an additional operating position and / or a non-operating position by displacing and / or tilting the layers parallel to the axis of the gas flow channel, horizontally to the axis of the gas flow channel.

[0008] In the solution according to the invention, during operation, the two layers of the equipment are positioned at a distance from each other in the gas flow channel, with the rod-shaped elements of the first layer offset relative to the rod-shaped elements of the second layer. From this perspective, this is considered to be the optimal operating position. When the layer is then to assume another operating or non-operating position, it is moved to this changed position by the provided movement device. For example, the distance between the two layers or, for example, the overlap of the rod-shaped elements of the two layers can be changed thereby. In any case, the corresponding layer can also be moved to a non-operating position, where it does not perform any function at all or only performs a reduced function. This can be the case, for example, when the function of the coalescing layer is no longer required, thus saving corresponding energy.

[0009] Thus, both layers of the equipment can be moved relative to each other so that an optimized operating position is obtained, or one layer is placed in a completely inoperative position.

[0010] The equipment according to the invention can be configured, for example, as a coalescer. In this respect, tubes are preferably used as rod-shaped elements, which are arranged at a specific distance from each other to achieve the desired coalescer effect. The rods or tubes of two layers are arranged offset relative to each other, i.e., overlap each other in the gas flow direction, so that the desired deflection effect of the gas flow is achieved. In this situation, the distance of the layers from each other or the distance (degree of overlap) of the elements of the two layers can be varied according to the invention.

[0011] In another embodiment of the present invention, the system is configured as a mass transfer tray. Such mass transfer trays are so-called tray assemblies, such as sieve trays or trays formed from offset rows of tubes. Due to the high resistance of the trays to the fluid coming from above, gas flows through the trays from below, forming a bubble layer above the trays, where highly intensive mass transfer occurs. This significantly improves the SO2 separation efficiency, but at the cost of higher energy consumption. The system according to the present invention can function to reduce energy consumption over time if the function of the trays constructed from rows of tubes is switched on only when needed.

[0012] The installation formed in accordance with the present invention is preferably part of a flue gas scrubber.

[0013] In another embodiment of the present invention, the installation comprises a device for detecting a parameter and a control unit for processing a signal received from the parameter detection device and controlling the moving device accordingly to place the first or second layer in an additional operating position or a non-operating position.

[0014] In the simplest case, the transfer device can be manually switched on and off, for example, when it is desired to remove one layer from operation. This process can be automated if sensors detect parameters that are transferred to a control unit that operates the transfer device. An embodiment in which the parameter detection device detects a parameter of the gas flow is particularly preferred. For example, in this embodiment, the dust load, SO2 content, etc. of the gas flow are measured via sensors, which then transfer their signals to the control unit.

[0015] The control unit itself is capable of comparing the signal received from the parameter detection device with a threshold value and actuating the mobile device in response to this comparison.

[0016] As mentioned above, the transfer device can move the layers of the equipment parallel to the axis of the gas flow channel, laterally to the axis of the gas flow channel, and / or by tilting. In this configuration, in the first case, the distance between two layers of the equipment is increased or decreased. If the distance is increased starting from the optimal position, the moved layer is eventually moved to a non-operating position, so that the clumping effect can no longer occur. On the one hand, moving the layer perpendicular to the axis of the gas flow channel pushes the layer laterally out of the gas flow channel. On the other hand, if the direction is shifted by a 90° change, the overlap of the rod-shaped elements of the two layers changes. If the rod-shaped elements are aligned vertically, the non-operating position is also reached, since the deflection of the gas flow no longer occurs. In any case, the transfer device formed according to the present invention provides at least these three types of movement and, in addition, tilting the layer away from the gas flow channel.

[0017] As for the design of the displacement device itself, it is preferable to use hydraulic cylinders. These hydraulic cylinders can be coupled with the equipment's flushing device, so that the displacement device for the layer is activated simultaneously when the flushing device is commissioned. This is especially true when the coalescer or material transfer trays are continuously flushed. If the only operation required was to clean the demister (1 minute / hour), it would obviously not make sense to displace the coalescer for this period. In this case, the hydraulic cylinders must be controlled independently of the demister, but still with the same medium. The advantage of using water as an operating medium is that it can be used independently of the equipment's flushing, so the layer can be displaced simultaneously when the flushing is switched on and off.

[0018] The tiltable attachment of the layers via the joints allows the folding to be performed by using hydraulic cylinders.

[0019] The lateral offset of the layers relative to one another can also be effected by hydraulic cylinders so that during operation they are non-functionally aligned with one another and otherwise displaced relative to one another.

[0020] In the solution according to the invention, the parameter detection device (sensor), the control unit and the movement device cooperate to set the distance between the two layers, as well as the overlap of the rod-shaped elements of the two layers. In this way, an optimized setting of the installation, which can act as a coalescer, for example, can be achieved.

[0021] The installations formed according to the invention relate to gas streams that can be filled with solid or liquid particles.Furthermore, the invention relates to trays formed from tubes or rods.

[0022] The arrangements described herein can be used in a gas flow channel in combination with a downstream demister, such as a vane eliminator. It is understood that the arrangements have at least first and second layers, and that multiple layers can also be arranged.

[0023] The invention is explained in more detail below on the basis of exemplary embodiments with reference to the drawings. [Brief explanation of the drawings]

[0024] [Figure 1] FIG. 1 is a schematic side view of the gas flow channels provided in the installation. [Figure 2] 1 with another exemplary embodiment of the installation; [Figure 3] 1 (shifted by 90°) with another exemplary embodiment of the installation. [Figure 4] 4 is a view similar to FIG. 3 following movement of the lower layer of the coalescer; [Figure 5] 2 is another schematic side view of the installation of FIG. 1. [Figure 6] FIG. 2 is a side view of the embodiment of FIG. 1 rotated 90 degrees. [Figure 7] FIG. 2 is a schematic detailed view of a hydraulic cylinder. DETAILED DESCRIPTION OF THE INVENTION

[0025] 1 shows a schematic representation of a gas flow channel 1 of a flue gas scrubber system. Located within the gas flow channel 1 is an arrangement 10, which is a coalescer consisting of a first (top) layer 2 of parallel-arranged rod-shaped elements and a second (bottom) layer 3 of parallel-arranged rod-shaped elements. In this configuration, the rod-shaped elements of the first layer 2 and the second layer 3 are staggered relative to one another so that they overlap in the gas flow direction (bottom to top), forming a curved flow path between them.

[0026] In this embodiment, the second lower layer 3 of the coalescer is movably arranged. As indicated by the arrow, the lower layer 3 can be moved downwards from the position shown by the solid line to position 4 shown by the dotted line. When the second layer is located in lower position 4, the two layers 2, 3 have a greater distance from each other, which corresponds to a non-operating position. Therefore, when the operation of the coalescer is to be stopped, the lower layer 3 is moved downwards to position 4 by a moving device not shown here.

[0027] In the embodiment of Fig. 2, an installation formed as a coalescer and having a first upper layer 2 and a second lower layer 3 is also provided. Both layers are in this case tubes, which are collections of rod-shaped elements arranged next to each other at a distance. In this configuration, to put the second layer 3 into the inoperative position, the layer is moved laterally out of the gas flow channel 1, as represented by the dotted line 5.

[0028] In the embodiment shown in Figures 3 and 4, the rod-shaped elements of the second lower layer 3 are moved from left to right in a direction perpendicular to the axis of the gas flow channel 1 in the plane of the drawing so that there is zero overlap between the rod-shaped elements of the two layers 2, 3. Once the rod-shaped elements of the two layers are aligned, flow deflection can no longer occur and the installation is therefore placed in a non-operational state.

[0029] Figures 5 to 7 show a more accurate depiction of the first embodiment shown in Figure 1. In Figure 5, four hydraulic cylinders 6 can be identified, which are arranged below the second layer 3 and move the second layer 3 parallel to the axis of the flow channel. Figure 6 shows the installation of the device on a support holder 7, which supports the second lower layer 3 of the installation, on which the hydraulic cylinders 6 are arranged. Furthermore, nozzle tubes 8 are shown, which serve to continuously spray the installation via hoses. Additional hoses lead from the nozzle tubes 8 to the hydraulic cylinders 6.

[0030] FIG. 7 shows in detail the hydraulic cylinder 6 with plunger rod 9 and plunger 12, as well as the water intake 11.

[0031] This embodiment is configured so that when flushing is switched on (via nozzle 8) and pressure is pre-fed into the hydraulic cylinder, the lower layer 3 is lifted above the hydraulic cylinder 6. This is typically 2 bar. In this state, the tube coalescer shown here has a small limiting drop and an associated pressure loss. When flushing stops, the lower layer 3 returns to its starting position. The tube coalescer has a low pressure loss and a large limiting drop. The return to the starting position is ideally achieved via the weight of the lower layer 3. If this is not sufficient, it can of course also be achieved via a second water connection in the hydraulic cylinder 6. However, a second inlet to the hydraulic cylinder must be installed from the outside. [Explanation of symbols]

[0032] 1. Gas flow channel 2 Upper layer 3 Lower layer 4 Lower position 5 Dotted line 6 hydraulic cylinders 7 Support holder 8 nozzle tube 9 Plunger Rod 10 Equipment 11 Water intake 12 Plunger

Claims

1. 1. An arrangement in a gas flow channel, comprising a first layer and a second layer offset with respect to the first layer, made up of horizontal rod-shaped elements arranged at a distance from each other in a plane transverse to the gas flow direction, said elements extending transversely across said gas flow channel, The installation is characterized in that it comprises a device for moving the second layer (3) relative to the first layer (2) or the first layer (2) relative to the second layer (3) from a first operating position to a further operating position and / or to a non-operating position by displacing and / or tilting the layers (2, 3) parallel to the axis of the gas flow channel (1) horizontally to the axis of the gas flow channel (1).

2. 2. The installation according to claim 1, characterized in that it is formed as a coalescer.

3. 2. The installation according to claim 1, characterized in that it is formed as a material transfer tray.

4. 4. The installation according to claim 1, wherein the rod-shaped element is formed as a tube.

5. An installation according to any one of claims 1 to 4, characterized in that it is part of a flue gas scrubber.

6. 6. The installation according to any one of claims 1 to 5, characterized in that it comprises a device for detecting a parameter and a control unit for processing signals received from said parameter detection device and controlling said moving device accordingly to put said first or second layer (2, 3) into said additional operative or inoperative position.

7. 7. The installation according to claim 6, wherein the parameter detection device detects a parameter of the gas flow.

8. 8. The installation according to claim 6 or 7, characterized in that the control unit compares the signal received from the parameter detection device with a threshold value and activates the mobile device depending on this comparison.

9. Installation according to any one of claims 1 to 8, characterized in that the devices for moving the layers (2, 3) comprise hydraulic cylinders (6).

10. 10. Installation according to claim 9, characterized in that the water-hydraulic cylinder (6) is coupled to a flushing device (8) for the installation.

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