Biomass powder gasification device and arrangement combination system

Abstract

The utility model discloses a biomass powder gasification device and an arrangement combination system. The biomass powder gasification device comprises a biomass conveying equipment group, a gasification equipment group, a slag water treatment equipment group and a pump equipment group, wherein the biomass conveying equipment group, the gasification equipment group and the slag water treatment equipment group are arranged in the same arrangement system, the arrangement system is a multi-layer structure frame, and the pump equipment is arranged in the first layer frame or around the structure frame; the biomass conveying equipment set comprises a biomass powder filter, a biomass powder storage tank provided with a rapping device, a biomass powder lock hopper, a biomass feeding tank provided with fluidizing gas and accessory equipment. According to the biomass powder gasification device and the arrangement combination system disclosed by the utility model, the slag water treatment equipment group and the gasification equipment group are arranged in the same structural frame, a pipe gallery is canceled, the length of a pipeline is greatly shortened, and due to the fact that one frame is omitted, the civil engineering cost is reduced, the investment is reduced on the whole, and the convenience degree of routing inspection is improved; and production management is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of biomass pyrolysis and gasification, and more specifically, to a biomass powder gasification device and a combined arrangement system. Background Art

[0002] Biomass, as an energy source that converts solar energy into chemical energy for storage, has many advantages such as being renewable, pollution-free, and widely distributed. Biomass gasification technology can convert biomass into synthesis gas mainly composed of carbon monoxide and hydrogen under high temperature and high pressure in the gasifier, and is one of the best technologies for utilizing biomass energy. Powder transportation has the advantages of compact structure and convenient operation, and is widely used in pulverized coal gasification. Studies have shown that after special treatment of biomass, such as micron-level grinding, steam explosion, hot pressing and grinding, its powder bulk density is similar to that of coal powder. Therefore, mature coal powder gasification technology can be applied to the field of biomass gasification to a certain extent.

[0003] The equipment of pulverized coal gasification device mainly includes powder conveying equipment, gasification equipment and water treatment equipment. At present, the layout of most pulverized coal gasification plants is to arrange the pulverized coal conveying equipment and gasification equipment on the same frame, and the slag water treatment equipment on another frame, and use an external pipe gallery to connect the two frames. There are three main problems: 1) Two frames are used, which occupies a larger area and has higher civil engineering costs; 2) Syngas pipelines and black water pipelines are both high-pressure and large-diameter pipelines, and the gasification equipment and slag water treatment equipment are far away, so the pipeline investment is high; 3) It is not conducive to staff inspection and production management. Utility Model Content

[0004] The purpose of the utility model is to provide a biomass powder gasification device and a combined arrangement system, which not only solves the problems of large floor space occupied by the prior art slag water treatment equipment and gasification equipment group arranged in two frames, the need for pipe corridors and pipelines to connect the frames, and high civil engineering costs, but also facilitates staff inspections and is beneficial to production management.

[0005] In order to achieve the purpose and other advantages of the utility model, a biomass powder gasification device and a combined arrangement system are provided, including: a biomass conveying equipment group, a gasification equipment group, a slag water treatment equipment group and a pump equipment group;

[0006] Among them, the biomass conveying equipment group, the gasification equipment group and the slag water treatment equipment group are arranged in the same arrangement system, the arrangement system is a multi-layer structural frame, and the pump equipment is arranged in the first layer frame or around the multi-layer structural frame; the biomass conveying equipment group includes: a biomass powder filter, a biomass powder storage tank equipped with a vibrating device, a biomass powder locking hopper, a biomass feeding tank equipped with fluidizing gas and ancillary equipment.

[0007] Preferably, the gasification equipment group includes: a gasifier, an ignition and feeding integrated burner, a slag collecting lock bucket, a lock bucket flushing water tank, a slag pool, a slag scoop machine, a venturi scrubber, a gas scrubber and auxiliary equipment;

[0008] The slag water treatment equipment includes: a high-pressure flash tank, a vacuum flash tank, a hot water tower and auxiliary equipment.

[0009] Preferably, the synthesis gas pipeline from the gasifier to the scrubber, the black water pipeline from the gasifier to the high-pressure flash tank, and the black water pipeline from the scrubber to the high-pressure flash tank are all arranged in a multi-layer structural frame.

[0010] Preferably, the pump equipment includes: a boiler water circulation pump, a quenching water pump, a slag pool pump, a lock hopper circulation pump and a high-pressure ash water pump.

[0011] Preferably, the biomass powder filter, the biomass powder storage tank, the biomass powder lock hopper, and the biomass feeding tank are arranged in sequence from high to bottom in the multi-layer structure frame.

[0012] Preferably, the biomass conveying equipment group further includes a biomass raw material bin and a biomass material crusher, the biomass raw material bin is arranged above the biomass material crusher, and the biomass raw material bin and the biomass material crusher are arranged in the same multi-layer structural frame as other equipment in the biomass conveying equipment.

[0013] Preferably, the gasification equipment group further comprises: a water-cooled wall steam drum and a waste boiler steam drum, and the water-cooled wall steam drum and the waste boiler steam drum are arranged on the top layer of the multi-layer structural frame.

[0014] Preferably, the integrated ignition and feeding burner is provided with a burner water cooling device, and the burner water cooling device and the gasifier share a boiler water circulation pump.

[0015] Preferably, the slag water treatment equipment group further includes: a gray water deaerator and a low-pressure flash tank.

[0016] Preferably, the venturi scrubber is arranged inside the scrubbing tower as an internal part of the scrubbing tower.

[0017] The utility model at least has the following beneficial effects:

[0018] The utility model arranges the slag water treatment equipment group and the gasification equipment group in the same structural frame, eliminates the pipe gallery, greatly shortens the pipeline length, and reduces the civil engineering cost due to the reduction of one frame, thereby reducing the investment overall, improving the convenience of inspection, and facilitating production management.

[0019] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a cross-sectional view of a biomass powder gasification device and a combined arrangement system according to an embodiment of the utility model;

[0021] Figure 2 This is a cross-sectional view of a biomass powder gasification device and a combined arrangement system according to an embodiment of the utility model;

[0022] Figure 3 This is a first floor structural diagram of a biomass powder gasification device and a combined arrangement system according to an embodiment of the utility model;

[0023] Figure 4 This is a second floor structural diagram of a biomass powder gasification device and a combined arrangement system according to an embodiment of the utility model;

[0024] Figure 5 It is a 3rd floor structural diagram of a biomass powder gasification device and a combined arrangement system according to an embodiment of the utility model;

[0025] Figure 6 This is a 4th floor structural diagram of a biomass powder gasification device and a combined system arrangement according to an embodiment of the utility model;

[0026] Figure 7 It is a 5th floor structural diagram of a biomass powder gasification device and a combined arrangement system according to an embodiment of the utility model;

[0027] Figure 8 It is a 6th floor structural diagram of a biomass powder gasification device and a combined arrangement system according to an embodiment of the utility model;

[0028] Fig. 9 It is a 7th floor structural diagram of a biomass powder gasification device and a combined arrangement system according to an embodiment of the utility model;

[0029] Fig.10 It is a structural diagram of the 8th floor of a biomass powder gasification device and a combined arrangement system according to an embodiment of the utility model;

[0030] Fig.11 It is a 9th floor structural diagram of a biomass powder gasification device and a combined arrangement system according to an embodiment of the utility model;

[0031] Figure numerals: 1: biomass raw material warehouse, 2: biomass material crusher, 3: biomass powder filter, 4: biomass powder storage tank, 5: biomass lock hopper, 6: biomass feeding tank, 7: water-cooled wall drum, 8: waste boiler drum, 9: gasifier, 10: lock hopper, 11: lock hopper circulation pump, 12: lock hopper flushing water tank, 13: slag pool, 14: slag remover, 15: Venturi scrubber, 16: gas washing tower, 17: high-pressure flash tank, 18: vacuum flash tank, 19: hot water tower, 20: vacuum flash tank condenser, 21: slag pool pump, 22: boiler water circulation pump, 23: quenching water pump, 24: high-pressure ash water pump, 25: waste boiler dosing tank, 26: water-cooled wall dosing tank, 27: dosing pump, 28: slag crusher, 29: ignition and feeding integrated burner. DETAILED DESCRIPTION

[0032] The present invention will be further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0033] It should be noted that, in the description of the present invention, the terms "lateral", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0034] It should be noted that the control methods in the following embodiments are conventional methods unless otherwise specified, and the equipment structures are commercially available unless otherwise specified.

[0035] like Figures 1 to 11 As shown, the utility model provides a biomass powder gasification device and a combined arrangement system, including:

[0036] Biomass conveying equipment group, gasification equipment group, slag water treatment equipment group and pump equipment group;

[0037] Among them, the biomass conveying equipment group, the gasification equipment group and the slag water treatment equipment group are arranged in the same arrangement system, the arrangement system is a multi-layer structural frame, and the pump equipment is arranged in the first layer frame or around the multi-layer structural frame; the biomass conveying equipment group includes: a biomass powder filter 3, a biomass powder storage tank 4 equipped with a vibrating device, a biomass powder lock hopper 5, a biomass feeding tank 6 equipped with fluidizing gas and ancillary equipment.

[0038] In the above embodiment, if Figure 1As shown, the biomass conveying equipment group includes a biomass powder filter 3 arranged from high to low, a biomass powder storage tank 4 equipped with a vibrating device, a biomass powder lock hopper 5, and a biomass feeding tank 6 equipped with fluidizing gas. The length, height, width, etc. of the multi-layer frame can be adjusted according to the size of the equipment, which can ensure that the biomass conveying equipment group, the gasification equipment group, and the slag water treatment equipment group are all arranged in the same frame. For higher equipment, the frame can be partially heightened without the need for overall heightening. In this embodiment, by arranging the slag water treatment equipment group and the gasification equipment group in the same structural frame, the pipe gallery is cancelled, the length of the pipeline is greatly shortened, and because one frame is reduced, the civil construction cost is reduced, the investment is reduced overall, the convenience of inspection is improved, and production management is facilitated.

[0039] In another embodiment, Figure 1 As shown, the gasification equipment group includes: a gasifier 9, an ignition and feeding integrated burner, a slag collecting lock bucket 10, a lock bucket flushing water tank 12, a slag pool 13, a slag scoop machine 14, a venturi scrubber 15, a gas scrubber 16 and auxiliary equipment;

[0040] The slag water treatment equipment includes: a high-pressure flash tank 17, a vacuum flash tank 18, a hot water tower 19 and auxiliary equipment.

[0041] In the above embodiment, if Figure 2 As described above, an additional frame is added next to the gasification equipment group to arrange the slag water treatment equipment group, the high-pressure flash tank 17, the vacuum flash tank 18, the hot water tower 19 and the ancillary equipment: the vacuum flash tank condenser 20 can be arranged in the same frame with the gasification equipment group, without the need for an external pipe corridor, thereby reducing the cost of civil engineering and pipelines, and making it more convenient for staff to inspect.

[0042] In another embodiment, the synthesis gas pipeline from the gasifier 9 to the scrubber 16, the black water pipeline from the gasifier 9 to the high-pressure flash tank 17, and the black water pipeline from the scrubber 16 to the high-pressure flash tank 17 are all arranged in a multi-layer structural frame.

[0043] In the above implementation scheme, there is no need for an external pipe corridor, and all pipelines are arranged in the same multi-layer structural frame, which greatly shortens the length of the pipelines and reduces the civil engineering cost.

[0044] In another embodiment, Figure 3 As shown, the pump equipment includes: a boiler water circulation pump 22, a quenching water pump 23, a slag pool pump 21, a lock bucket circulation pump 11 and a high-pressure ash water pump 24.

[0045] In the above embodiment, it should be noted that the pump equipment group can be arranged on the first layer of the frame, or some pumps can be arranged outside the frame according to the internal arrangement, such as Figure 3 As shown, the high-pressure grey water pump 24 and the quenching water pump 23 are both arranged outside the multi-layer frame, close to the hot water tower 19 and the scrubber tower 16 .

[0046] In another embodiment, Figure 1 As shown, the biomass powder filter 3, the biomass powder storage tank 4, the biomass powder lock hopper 5, and the biomass feeding tank 6 are arranged in sequence from high to bottom in the multi-layer structure frame.

[0047] In the above embodiment, according to the production scale, the biomass conveying equipment group may also include a biomass raw material warehouse 1 and a biomass material crusher 2, wherein the biomass raw material warehouse 1 is arranged above the biomass material crusher 2, and the biomass raw material warehouse 1 and the biomass material crusher 2 may be arranged in the same multi-layer structure frame as the biomass powder filter 3, the biomass powder storage tank 4, the biomass powder lock hopper 5, and the biomass feeding tank 6 in the biomass conveying equipment by adding a secondary collapse outside the original frame. The biomass raw materials are transported to the biomass raw material warehouse 1 and fall to the entrance of the biomass material crusher 2 by gravity. The biomass raw material warehouse 1 is arranged above the biomass material crusher 2. The crushed biomass is pneumatically transported to the biomass powder filter 3 on the 9th floor, and the filtered biomass powder falls into the biomass powder storage tank 4, and then enters the biomass powder lock hopper 5 and the biomass feeding tank 6 in turn.

[0048] In another embodiment, Figure 2 As shown, the gasification equipment group further includes: a water-cooled wall steam drum 7 and a waste boiler steam drum 8, and the water-cooled wall steam drum 7 and the waste boiler steam drum 8 are arranged on the top layer of the multi-layer structural frame.

[0049] In the above embodiment, if the gasifier 9 adopts a water-cooled wall quenching form, or a water-cooled wall directly connected to a waste boiler form, and the gasification equipment group also includes a water-cooled wall steam drum 7 and a waste boiler steam drum 8, then the water-cooled wall steam drum 7 and the waste boiler steam drum 8 need to be arranged.

[0050] In another embodiment, Figure 1 As shown, the integrated ignition and feeding burner 29 is equipped with a burner water cooling device, and the burner water cooling device and the gasification furnace 9 share a boiler water circulation pump 22 .

[0051] In another embodiment, the slag water treatment equipment group further includes: a gray water deaerator and a low-pressure flash tank.

[0052] In the above embodiment, according to the gasification pressure required for production, the slag water treatment equipment group may also include: a gray water deaerator and a low-pressure flash tank; wherein the gray water deaerator and the low-pressure flash tank and other equipment of the slag water treatment equipment group are arranged in the same multi-layer structural frame.

[0053] In another embodiment, Figure 1 As shown, the venturi scrubber 15 can be arranged inside the scrubbing tower 16 as an internal part of the scrubbing tower.

[0054] In another embodiment, Figure 4 As shown, according to whether the gasifier 9 adopts a water-cooled wall quenching form or a water-cooled wall directly connected to the waste boiler form, a water-cooled wall dosing tank 26 and a waste boiler dosing tank 25 and corresponding dosing pumps 27 (waste boiler dosing pump and water-cooled wall dosing pump) are arranged on the second floor of the multi-layer structural frame. According to production needs, a slag breaker 28 can also be arranged.

[0055] In order to enable those skilled in the art to better understand the technical solution of the utility model, the following embodiments are provided for illustration:

[0056] like Figures 1 to 11 , a biomass powder gasification device and a combined arrangement system, comprising:

[0057] Biomass conveying equipment group, gasification equipment group, slag water treatment equipment group and pump equipment group;

[0058] The biomass conveying equipment group, the gasification equipment group and the slag water treatment equipment group are arranged in the same arrangement system, the arrangement system is a multi-layer structural frame, and the pump equipment is arranged in the first layer frame or around the multi-layer structural frame;

[0059] The biomass conveying equipment group adopts the form of pneumatic conveying, including: a biomass powder filter 3, a biomass powder storage tank 4 equipped with a vibrating device, a biomass powder lock hopper 5, a biomass feeding tank 6 equipped with fluidizing gas and auxiliary equipment; according to the production scale, the biomass conveying equipment group may also include a biomass raw material warehouse 1 and a biomass material crusher 2, the biomass raw material warehouse 1 is arranged above the biomass material crusher 2, the biomass raw material warehouse 1 and the biomass material crusher 2 can be arranged on the outside of the original frame by adding a secondary collapse, and the biomass powder filter 3, the biomass powder storage tank 4, the biomass powder lock hopper 5, and the biomass feeding tank 6 in the biomass conveying equipment are arranged in the same multi-layer structure frame; wherein the biomass powder filter 3, the biomass powder storage tank 4, the biomass powder lock hopper 5, and the biomass feeding tank 6 are arranged in sequence from high to bottom in the multi-layer structure frame; the fluidizing gas in the biomass feeding tank 6 equipped with fluidizing gas adopts carbon dioxide or nitrogen;

[0060] The gasification equipment group includes: a gasifier 9, an ignition and feeding integrated burner 29, a slag collecting lock bucket 10, a lock bucket flushing water tank 12, a slag pool 13, a slag scooper 14, a venturi scrubber 15, a gas washing tower 16 and auxiliary equipment; if the gasifier 9 adopts a water-cooled wall quenching form, it is necessary to arrange a water-cooled wall steam drum 7 on the top layer of the multi-layer structure frame; if the gasifier 9 adopts a water-cooled wall directly connected to a waste boiler form, it is necessary to arrange a waste boiler steam drum 8 on the top layer of the multi-layer structure frame; the ignition and feeding integrated burner 29 is equipped with a burner water cooling device, and the burner water cooling device and the gasifier water-cooled wall share a boiler water circulation pump 22; the venturi scrubber 15 can be arranged inside the gas washing tower 16 as an internal part of the gas washing tower 16;

[0061] The slag water treatment equipment includes: a high-pressure flash tank 17, a vacuum flash tank 18, a hot water tower 19 and auxiliary equipment; according to the gasification pressure required for production, the slag water treatment equipment group may also include: an ash water deaerator and a low-pressure flash tank; wherein the ash water deaerator and the low-pressure flash tank and other equipment of the slag water treatment equipment group are arranged in the same multi-layer structure frame;

[0062] The pump equipment includes: boiler water circulation pump 22, quenching water pump 23, slag pool pump 21, lock bucket circulation pump 11 and high-pressure ash water pump 24; the pump equipment group can be arranged on the first layer of the frame, or some pumps can be arranged outside the frame according to its internal layout, such as Figure 3 As shown, the high-pressure grey water pump 24 and the quenching water pump 23 are both arranged outside the multi-layer frame, close to the hot water tower 19 and the scrubber tower 16;

[0063] Among them, the synthesis gas pipeline from the gasifier 9 to the scrubber 16, the black water pipeline from the gasifier 9 to the high-pressure flash tank 17, and the black water pipeline from the scrubber 16 to the high-pressure flash tank 17 are all arranged in a multi-layer structural frame.

[0064] The arrangement and working method of the biomass powder gasification device and the arrangement combined system of this embodiment include the following steps:

[0065] Step 1: an additional pair of collapsible biomass raw material bin 1 and biomass material crusher 2 is added next to the biomass conveying equipment group arrangement frame. The biomass raw material bin 1 is arranged above the biomass material crusher 2. The biomass raw material is transported to the biomass raw material bin 1 and falls to the entrance of the biomass material crusher 2 by gravity. The crushed biomass is pneumatically transported to the biomass powder filter 3 on the 9th floor. The filtered biomass powder falls into the biomass powder storage tank 4, and then enters the biomass powder lock hopper 5 and the biomass feeding tank 6 in sequence;

[0066] Step 2: Biomass powder is transported from the biomass feed tank 6 to the inlet of the ignition and feeding integrated burner 29 by the carrier gas (carbon dioxide or nitrogen as the transport gas), and then transported to the gasifier 9 by the ignition and feeding integrated burner 29. The synthetic gas produced is then sent to the scrubber 16 from the outlet of the gasifier 9, and sent to the back stage after washing. The black water of the gasifier 9 and the scrubber 16 is discharged into the high-pressure flash tank 17, and then sent to the vacuum flash tank 18 after flash evaporation; since the gasifier 9 and the scrubber 16 are both arranged in the same frame, the synthetic gas pipeline from the gasifier 9 to the scrubber 16 is all arranged inside the frame. The black water pipeline is generally thicker, with more impurities and is easy to be blocked and worn. Arranging the slag water treatment equipment and the gasifier scrubber in the same frame does not require an additional pipe gallery, which saves the pipeline investment cost and is also conducive to pipeline maintenance.

[0067] The biomass powder gasification device and the combined arrangement system of this embodiment arrange the slag water treatment equipment group and the gasification equipment group in the same structural frame, eliminates the pipe gallery, greatly shortens the pipeline length, and reduces the civil engineering cost by reducing one frame, thereby reducing the investment overall, improving the convenience of inspection, and facilitating production management.

[0068] Although the implementation scheme of the utility model has been disclosed as above, it is not limited to the applications listed in the specification and implementation modes. It can be fully applied to various fields suitable for the utility model. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. Biomass powder gasification device and layout combined system, characterized in that: include: Biomass conveying equipment group, gasification equipment group, slag water treatment equipment group and pump equipment group; Among them, the biomass conveying equipment group, the gasification equipment group and the slag water treatment equipment group are arranged in the same arrangement system, the arrangement system is a multi-layer structural frame, and the pump equipment is arranged in the first layer frame or around the multi-layer structural frame; the biomass conveying equipment group includes: a biomass powder filter, a biomass powder storage tank equipped with a vibrating device, a biomass powder locking hopper, a biomass feeding tank equipped with fluidizing gas and ancillary equipment.

2. The biomass powder gasification device and the combined arrangement system according to claim 1, characterized in that: The gasification equipment group includes: a gasifier, an integrated ignition and feeding burner, a slag collecting lock bucket, a lock bucket flushing water tank, a slag pool, a slag scoop machine, a venturi scrubber, a gas scrubber and auxiliary equipment; The slag water treatment equipment includes: a high-pressure flash tank, a vacuum flash tank, a hot water tower and auxiliary equipment.

3. The biomass powder gasification device and the combined arrangement system as claimed in claim 2, characterized in that: The synthesis gas pipeline from the gasifier to the scrubber, the black water pipeline from the gasifier to the high-pressure flash tank, and the black water pipeline from the scrubber to the high-pressure flash tank are all arranged in a multi-layer structural frame.

4. The biomass powder gasification device and the combined arrangement system as claimed in claim 1, characterized in that: The pump equipment includes: a boiler water circulation pump, a quenching water pump, a slag pool pump, a lock bucket circulation pump and a high-pressure ash water pump.

5. The biomass powder gasification device and arrangement combined system as claimed in claim 1, characterized in that: The biomass powder filter, the biomass powder storage tank, the biomass powder lock hopper, and the biomass feeding tank are arranged in sequence from high to low in the multi-layer structure frame.

6. The biomass powder gasification device and arrangement combined system as claimed in claim 1, characterized in that: The biomass conveying equipment group also includes a biomass raw material bin and a biomass material crusher. The biomass raw material bin is arranged above the biomass material crusher. The biomass raw material bin and the biomass material crusher are arranged in the same multi-layer structural frame as the biomass powder filter, the biomass powder storage tank equipped with a vibrating device, the biomass powder locking bucket, the biomass feeding tank equipped with fluidizing gas and the ancillary equipment in the biomass conveying equipment group.

7. The biomass powder gasification device and arrangement combined system as claimed in claim 2, characterized in that: The gasification equipment group further includes: a water-cooled wall steam drum and a waste boiler steam drum, and the water-cooled wall steam drum and the waste boiler steam drum are arranged on the top layer of the multi-layer structural frame.

8. The biomass powder gasification device and arrangement combined system as claimed in claim 2, characterized in that: The ignition and feeding integrated burner is equipped with a burner water cooling device, and the burner water cooling device and the gasifier share a boiler water circulation pump.

9. The biomass powder gasification device and arrangement combined system as claimed in claim 2, characterized in that: The slag water treatment equipment group also includes: a gray water deaerator and a low-pressure flash tank.

10. The biomass powder gasification device and arrangement combined system as claimed in claim 2, characterized in that: The venturi scrubber is arranged inside the scrubbing tower as an internal part of the scrubbing tower.

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