Transportable fluid treatment unit, a transport unit comprising the transportable fluid treatment unit and methods of transporting and installing

Abstract

The invention relates to a transportable fluid treatment unit (10) for removing a fluid from a stream, the transportable fluid treatment unit (10) being configured to be arranged on a transport unit (100), wherein the transportable fluid treatment unit (10) comprises: - a unit deck (50); - a platform (60) movably arranged relative to the unit deck (50); - an first column (70) having a center axis (CAA), wherein the first column (70) is arranged on the platform (60); - a tilting unit (40) configured to bring the first column (70) between: i. an upright position where the center axis (CAA) of the first column (70) extends in a vertical direction (VD), and ii. a transport position where the center axis (CAA) of the first column (70) is inclined relative to the upright position. The invention also relates to a transport unit (100) comprising the transportable fluid treatment unit (10) as well as a method of preparing the transportable fluid treatment unit (10) for transport and installing the transportable fluid treatment unit (10) at a fluid removal site.

Description

[0001] TRANSPORTABLE FLUID TREATMENT UNIT, A TRANSPORT UNIT COMPRISING THE TRANSPORTABLE FLUID TREATMENT UNIT AND METHODS OF TRANSPORTING AND INSTALLING

[0002] Technical Field

[0003] The present disclosure relates to the technical field of removing or separating fluids from a stream. In particular, the disclosure relates to a transportable fluid treatment unit comprising a first column and a second column which can be moved between an upright position, i.e. an operating position, and a transport position, i.e. a position suitable for transport.

[0004] The disclosure also relates to a transport unit comprising the transportable fluid treatment unit, a method of preparing the transportable fluid treatment unit for transport as well as method of installing the transportable fluid treatment unit at a fluid removal site.

[0005] Background

[0006] There is a continually increasing combustion of fossil fuel, such as coal, natural gas, and oil. This combustion results in an increase in the CO2 concentration in the atmosphere. It is acknowledged that the so-called greenhouse effect is at least partly caused by this increasing CO2 concentration.

[0007] It is therefore a need to reduce the amount of CO2 discharged into the atmosphere by combustion of fossil fuel.

[0008] There is also a need for removing and possibly capturing CO2 during production of natural gas and natural gas products where the well stream contains CO2 which would otherwise influence the quality and / or handling of the natural gas product.

[0009] As described in WO 2013 / 004797 Al, one approach being adopted is to capture CO2 (i.e. prevent the release of CO2) from the exhaust gases, e.g. from thermal power plants, before they are released to the atmosphere. The captured CO2 may be injected into subterranean formations such as aquifers, oil wells for enhanced oil recovery or in depleted oil and gas wells for deposition since tests indicate that CO2 remains in the subterranean formation for thousands of years and is not released back into the atmosphere. The most common CO2 capture processes are based on the CO2-containing gas mixture being introduced, in counter flow, to an aqueous absorbent in an adsorber column. The gas leaving the adsorber column is CO2 depleted. The CO2 leaves the adsorber column together with the absorbent. Typically, the absorbent is subsequently regenerated in a regenerator column and returned to the adsorber column . The CO2 separated from the absorbent is sent for storage, e.g. in a subterranean formation.

[0010] Other prior art includes US 2023227383 Al and US 6955704 BL US 2023227383 Al relates to a mobile gas processing plant which includes an inlet and an outlet, first and second Joule-Thompson (JT) valve units, an inlet scrubber, a dehydration unit including a contact tower, inlet and outlet filter separators, a vertical separator, and a dual pass line heater including first and second heating coils. US 6955704 Bl relates to a method and mobile system for cleaning dirty gas from a newly stimulated gas well. The entire system is supported on a trailer or other mobile support so that it can be driven from well site to well site for short-term, post-stimulation use only. The system comprises a gas separator, such as a membrane separator. The system also includes a pretreatment assembly for preparing the gas for the gas separator.

[0011] Several types of aqueous absorbents are utilised in carbon capture processes including amines, carbonates and amino acid salts. The currently preferred absorbents for use in these processes are, however, aqueous solutions of different amines. The amines used for the CO2 capture, and also the fluids used for emission control and flue gas treatment, however, interact with several of the materials most commonly used in the construction of equipment that is used in the CO2 capture process. For instance, the amines may cause corrosion or degradation of the equipment material, particularly the columns, its inserts and piping where the amines are present in significant amounts and at relatively high temperatures.

[0012] Polyolefin materials, e.g. polypropylene and polyethylene, are generally very resistant against amines at low and moderate temperatures, and may be used in contact with amines either alone or as liners on less resistant substrates of e.g. steel, concrete, or composite materials. For application in CO2 capture plants, the required service lifetime of a liner is more than 30 years at temperatures up to 80 °C and in amine solution (e.g. 30 % monoethanolamine (MEA) in water or similar concentrations of other amines or mixtures of amines). Amine is known to have a natural affinity for CO2 making it a very efficient and effective removal process.

[0013] In order for the adsorber unit, e.g. an amine unit or a glycol unit, to process the fluid from the gas stream properly, the adsorber column has to be tall, making it difficult to transport as well as requiring large cranes for installation.

[0014] It is therefore an objective to provide an adsorber unit which is suitable to be transported.

[0015] A further objective to provide an adsorber unit which can be installed without using cranes, i.e. crane-less installation.

[0016] Summary of the invention

[0017] The present invention is directed to a solution that may solve or at least reduce at least one of the aforementioned problems or challenges. The claimed invention is specified in the independent claims of this application.

[0018] Advantageous adaptations and versions of the claimed invention are specified in the independent claims.

[0019] This invention is applicable in cases where the transportable fluid treatment unit needs to be assembled or disassembled frequently such as for cases of well testing or flare gas treatment systems. In well testing operations natural gas can burn in flares from durations as low as 2 weeks. In flare gas treatment systems flare gas tends to decrease production quickly. And since it’s usually a subproduct of the oil production, the producers cannot commit with any production. So, whenever the flare production decreases to a certain flow, the transportable fluid treatment unit can be moved to a new location.

[0020] Throughout the disclosure, the terms “transportable fluid treatment unit“, “transportable gas treatment unit” and “transportable adsorber unit” are used interchangeably. It shall be understood that these units are meant to mean the same and shall not to be interpreted differently.

[0021] In the event the transportable fluid treatment unit is a transportable adsorber unit, it is clear that the term “adsorber unit” also includes “absorber unit”. Generally, adsorption involves adhesion of a material onto the surface of a substance whereas absorption involves the mass transfer of particles into another material.

[0022] In particular, the invention relates to a transportable fluid treatment unit which is suitable for assembling on a transport unit, such as e.g. a truck. In order to be able to transport transportable fluid treatment unit between different locations without risking that the fluid column(s) are damaged, the fluid column(s) is tiltable between an upright position and a transport position using a tilting unit forming part of the transportable fluid treatment unit. The tilting unit renders the need for a mobile crane superfluous, thereby saving cost, and possibly time, during installation and disassembling at a fluid removal site. In particular, the invention is advantageous in fluid treatment units which are frequently installed and disassembled at different fluid (e.g. CO2 or H2S) treatment sites, such as is the cases for well testing and flare gas treatment systems. In principle, the invention can be used in any system that requires columns, such as for distillation (e.g. de-butanizer, de-propanizer) and dehydration.

[0023] The present invention relates to a transportable fluid treatment unit for removing a fluid from a stream, the transportable fluid treatment unit being configured to be arranged on a transport unit, wherein the transportable fluid treatment unit comprises:

[0024] - an unit deck;

[0025] - a platform movably arranged relative to the unit deck;

[0026] - an first column having a center axis, wherein the first column is arranged on the platform;

[0027] - a second column having a center axis, wherein the second column is arranged on the same platform as the first column;

[0028] - a tilting unit configured to bring the first column and the second column between: i. an upright position where the center axis of the first column and the center axis of the second column extend in a vertical direction, and ii. a transport position where the center axis of the first column and the center axis of the second column are inclined relative to the upright position.

[0029] The stream can be a fluid stream.

[0030] More particularly, the stream can be a gas stream.

[0031] Alternatively, the stream can be a liquid stream.

[0032] The term “column” is used herein to refer to a fluid column or fluid treatment column, such as an adsorber column, an absorber column, a desorber column, a distillation column.

[0033] The adsorber column is also referred to as a contactor or sweetening tower.

[0034] The desorber column is also referred to as a regenerator column, stripping column or still column.

[0035] In the transport position, the first column is folded, making its total height smaller than in the upright position.

[0036] The invention provides a first column with sufficient height such that the fluid removal from the stream is efficient. I.e., the transportability of transportable fluid treatment unit does not compromise the ability of efficient fluid removal since the fluid column height is not reduced.

[0037] The transportable fluid treatment unit may comprise a pin or similar locking the position of the platform, and thus the fluid column, relative the unit deck both in the upright position and in the transport position. One or more guy wires or guy cables, i.e. tensioned cables, may be used to add stability to the first column and the second column when in the upright position.

[0038] In order to be able to tilt the first column and the second column, there may be reinforcements in the connection points between the first column and the platform. The reinforcement may be in the form of more robust fastening means and or welds.

[0039] Similarly, there may be reinforcements in the connection points between the second column and the platform.

[0040] The first column may be an adsorber column and the second column may be a desorber column. The transportable fluid treatment unit may be a transportable amine unit and the fluid to be removed may be CO2 or H2S.

[0041] The stream may be a stream of natural gas.

[0042] The stream can also be other streams where CO2 or H2S is present, such as an exhaust gas stream, a biogas, a syngas, ammonia etc.

[0043] The transportable fluid treatment unit may be a transportable glycol unit and the fluid to be removed may be water.

[0044] If the transportable fluid treatment unit is a transportable glycol unit, the gas stream may be a so-called wet gas stream where a glycol solution, such as e.g. diethylene glycol (DEG) or triethylene glycol (TEG), is used to remove water from the gas stream.

[0045] The first column and the second column may be distillation columns. The first and second columns may be configured for removing separating components of a fluid mixture.

[0046] When in the transport position, the center axis of the first column and the center axis of the second column may extend in a horizontal direction.

[0047] Horizontal direction shall be understood as parallel to, or substantially parallel to an underlying ground, thereby reducing the height of the fluid column maximally.

[0048] The transportable fluid treatment unit may comprise a pivotable connection pivotally connecting the platform to the unit deck. The pivotally connection forming a pivotally connection axis.

[0049] The tilting unit may comprise:

[0050] - a first hydraulic cylinder having a first end and a second end, wherein the first end may be connectable to the first column and the second end may be connectable to the unit deck; and

[0051] - a hydraulic power unit configured to operate the first hydraulic cylinder.

[0052] Alternatively, the tilting unit may comprise other, or additional, means for moving the first column between the upright position and the transport position, such as for example an on-board crane, a winch and wire arrangement etc.

[0053] When the first hydraulic cylinder is in an extended position, the first column and the second column may be in the upright position and, when the first hydraulic cylinder is in a retracted position, the first column and the second column may be in the transport position. The first end of the first hydraulic cylinder may be pivotally connected to the first column and the second end of the first hydraulic cylinder may be pivotally connected to the unit deck.

[0054] The first end of the first hydraulic cylinder may be pivotally connected to the first column in a fixed point of the first column and the second end of the first hydraulic cylinder may be pivotally connected to the unit deck in a fixed point of the unit deck.

[0055] Both the first end and the second end may be connected in fixed positions on the first column and the unit deck, respectively.

[0056] The first column may preferably have a larger diameter than the second column. In addition, the first column may be heavier than the second column.

[0057] In case the first column is an adsorber column and the second column is a desorber column, or in other similar setups with first and second columns, it may be advantageous to connect the first hydraulic cylinder to the adsorber column because of the following factors:

[0058] 1) the operation pressure of the adsorber column is normally higher than the operation pressure of the desorber column, and

[0059] 2) the adsorber column normally has a larger diameter than the desorber column. These two factors ensures that the area moment of inertia of the adsorber column to be much higher than the desorber column, therefore it can resist the forces required for folding / unfolding of both columns together.

[0060] The first column may comprise a slidable interface for connection to the first end of the first hydraulic cylinder, such that, when connected, the first end of the first hydraulic cylinder is slidable relative the first column. I.e., the first end is slidably, and rotatably, movable relative to the first column. The slidable interface can be a sleeve or other means rendering possible relative movement between two elements.

[0061] The platform may be movable between a first position where it is parallel to the unit deck and a second position where it is perpendicular to the unit deck.

[0062] When the platform is in the first position, the first column is in the upright position, and, when the platform is in the second position, the first column is in the transport position.

[0063] The maximum and minimum movement range of the first hydraulic cylinder is dependent on different parameters, such as: the connection point on the first column, angle between the first hydraulic cylinder and the first column, relative difference between the upright position and the transport position etc. The flexible hoses need to bend a lot during the fold and unfolding operation. Process hoses have a long bending radii, therefore it is normally required a lot of space for every flexible hose. There are a lot of process piping connecting to the first column and the second column and each pipe will connect to a flexible hose, resulting in many flexible hoses that will occupy a space that is unfeasible. Since there are many flexible hoses, and the available space for bending of all of the flexible hoses is limited, the second flange connection should be at or close to the pivotable connection (also referred to as hinge axis). Then it will be possible to bring the columns between the transport position and the upright position without disconnecting anything, ensuring the safety and speed of operation and enhancing the uptime of the operation.

[0064] The tilting unit may comprise:

[0065] - a second hydraulic cylinder operating synchronous with the first hydraulic cylinder, wherein the second hydraulic cylinder has a first end and a second end, wherein the first end may be connectable to the first column and the second end may be connectable to the unit deck; and the hydraulic power unit may be configured to operate the second hydraulic cylinder.

[0066] The hydraulic power unit operating the second hydraulic cylinder may be the same hydraulic power unit which operates the first hydraulic cylinder. Alternatively, the hydraulic power unit operating the second hydraulic cylinder may be different from the hydraulic power unit which operates the first hydraulic cylinder.

[0067] It may be advantageous to connect the first and second hydraulic cylinders to the first column if the first column has thicker walls than the second column.

[0068] The transportable fluid treatment unit may comprise a number of pipes connected to the first column, and the number of pipes may be arranged along an upper surface of the first column when the first column is in the transport position. As such, the risk of damaging the number of pipes between the first column and the unit deck, between the first column and the second column, or between any of the columns and the first hydraulic or second cylinder, is significantly reduced.

[0069] In other words, the pipes are not in conflict, i.e. in the way, when moving the first column and the second column between the upright position and the transport position.

[0070] Since the number of pipes that need to come along with the columns, up to the top, are high, it is advantageous if most of, or even all, of the pipes be on the top side (whenever the first and second columns are laid down in the transport position).

[0071] Furthermore, arranging the number of pipes along the upper surface of the first column it is not required to disconnect hoses whenever erecting or laying down the columns, reducing the installation and deinstallation time. The first column may comprise an access point for fluid communication between an inside of the first column and an outside of the first column.

[0072] The transportable fluid treatment unit may comprise a pipe section and a first end of the pipe section may be connectable to the access point and a second end of the pipe section may be connectable to a pipe of the number pipes. As such, there is provided fluid communication between the inside of the first column and the pipe of the number of pipes. In order to account for potentially different thermal expansion of the first column and the second column, as well as other possible changes of relative positions of the number of pipes and the access point, the pipe section is preferably a flexible pipe section.

[0073] There may be more than one access point and one hose may be connected to each access point.

[0074] The access point may comprise a flange connection.

[0075] When the first column and the second column are in the respective transport positions, the first column may be arranged at a higher elevation than the second column. The reason being that the column on the top needs to be the column with higher inertia momentum (which is the first column in this case), due to the rigidity. Positioning the first column above, i.e. at a higher elevation than, the second column has a further advantage in that the first hydraulic cylinder (and the second hydraulic cylinder if present) is closer to a vertical orientation (compared to positioning the first column below the second column) when the first column is in the transport position reducing the required force for the first hydraulic cylinder to lift the first column and the second column to the upright position. Thus, the solution solves an issue with the long stroke length required for the first hydraulic cylinder to move the columns between the transport and upright positions since there is a sufficient distance from the second end (connected to the unit deck) of the first hydraulic cylinder to the first end (connected to the first column).

[0076] The transportable fluid treatment unit may comprise connections between the first column and the second column for connecting the first column and the second column to each other, and the connections may be configured to account for thermal expansion.

[0077] Any connections between the first column and the second column should be configured to account for thermal expansion since the first column and the second column may operate under different temperatures. Such connections may be in the form of sliding pieces or other flexible connections serving the required purpose.

[0078] The sliding pieces may be a T-connection connected to the first column which is allowed to move inside a T-shaped guide of a recess part connected to the second column. Thereby the first column can move relative to the second column in a direction parallel to the center axes of the first column and the second column.

[0079] Other examples than the sliding pieces may be used, such as a cylinder.

[0080] In order to operate the first column and the second column, it will be required to have many pipes going to the columns. Pipes contain hazardous fluids such as natural gas, amine, H2S or others. Every time that is needed to fold or unfold, i.e. to bring the columns between the transport position and the upright position, it is required to disconnect a pipe with hazardous fluids. Therefore, it requires special procedures to evacuate the fluids and purge them to avoid exposure of operators to the fluids. These procedures take long time. This fluid treatment unit is transportable and can be in location for short periods (2 weeks for instance). The amount of time to do the piping connection and disconnection procedures can therefore be long compared to the total time that the transportable plant is in operation causing a high inefficiency. In order to reduce the time for connection and disconnection, the fluid treatment unit may comprise:

[0081] - a first flange connection arranged at or on the platform;

[0082] - a second flange connection arranged on the unit deck at or close to the pivotable connection;

[0083] - a flexible hose having a first end connected to the first flange connection and a second end connected to the second flange connection.

[0084] The invention also relates to a transport unit comprising a transportable fluid treatment unit as defined above. The transport unit comprising a support surface forming a support surface area and the first column is arranged inside the support surface area both when in the upright position and in the transport position.

[0085] The transport unit may comprise wheels for road transport.

[0086] The transport unit can be a truck or similar.

[0087] The transport unit may comprise one or more extendable support legs for supporting the transport unit at a fluid removal site.

[0088] Alternatively, the transportable fluid treatment unit may be adapted for transport on other means than a truck with wheels, such as e.g. on a train, a boat etc.

[0089] It is also described a method of preparing a transportable fluid treatment unit as defined above for transport, wherein the method comprises the steps of

[0090] - operating the tilting unit to move the first column and the second column from the upright position to the transport position. The method may comprise, before operating the tilting unit, a step of:

[0091] - unlocking a locking means such that the platform becomes pivotally movable relative the unit deck.

[0092] The step of unlocking may include releasing any bolts, pins, screws or other fastening means securing the first column in the upright position.

[0093] The method may comprise, after operating the tilting unit, a step of securing the first column in the transport position.

[0094] The securing of the first column may comprise using bolts, pins, screws or other fastening means.

[0095] It is also described a method of installing a transportable fluid treatment unit as defined above at a fluid removal site, wherein the method comprises a step of

[0096] - operating the tilting unit to move the first column and the second column from the transport position to the upright position.

[0097] The fluid removal site may be e.g. CO2 or H2S removal site, or alternatively a water removal site.

[0098] The method may comprise a step of

[0099] - securing the first column in the upright position. If required, the method may also include securing the second column in the upright position.

[0100] Above-discussed preferred and / or optional features of each aspect of the invention may be used, alone or in appropriate combination, in the other aspects of the invention.

[0101] Description of the drawings

[0102] Following drawings are appended to facilitate the understanding of the claimed invention:

[0103] Fig. 1 A is a side perspective view of a transportable adsorber unit according to a first aspect of the disclosure, where an adsorber column of the transportable adsorber unit is in an upright position;

[0104] Fig. IB is a side view of the transportable adsorber unit in Fig. 1 A;

[0105] Fig. 2A is a side perspective view of the transportable adsorber unit according to the first aspect of the disclosure, where the adsorber column is in a transport position;

[0106] Fig. 2B is a side view of the transportable adsorber unit in Fig. 2A;

[0107] Fig. 3 A is a side perspective view of the transportable adsorber unit according to the first aspect of the disclosure, where the adsorber column is tilted between the upright position and the transport position, forming an angle of approximately 30 degrees relative a vertical axis (i.e. the upright position);

[0108] Fig. 3B is a side view of the transportable adsorber unit in Fig. 3A;

[0109] Fig. 4A is a side perspective view of the transportable adsorber unit according to the first aspect of the disclosure, where the adsorber column is tilted between the upright position and the transport position, forming an angle of approximately 70 degrees relative a vertical axis (i.e. the upright position);

[0110] Fig. 4B is a side view of the transportable adsorber unit in Fig. 4A;

[0111] Fig. 5 is a top view of the transportable adsorber unit in Figs. 1 A and IB with the adsorber column in the upright position;

[0112] Fig. 6 is a top view of the transportable adsorber unit in Figs. 2A and 2B with the adsorber column in the transport position;

[0113] Fig. 7 is a side perspective view of a transportable adsorber unit according to a second aspect of the disclosure, where an adsorber column of the transportable adsorber unit is in an upright position;

[0114] Figs. 8-11 are side perspective views of the transportable adsorber unit according to the second aspect of the disclosure, where hoses and pipes between the adsorber column and the desorber column are better illustrated, and where: in Fig. 8 the adsorber column and the desorber column are in inclined intermediate position of about 30 degrees relative to the transport position, in Fig. 9 the adsorber column and the desorber column are in the transport position, in Fig. 10 the adsorber column and the desorber column are in an inclined intermediate position of about 60 degrees relative to the transport position, in Fig. 11 the adsorber column and the desorber column are in the upright position.

[0115] Fig. 12A is a top view of section A in Fig. 8 illustrating a connection between the adsorber column and the desorber column being in the form of sliding pieces;

[0116] Fig. 12B is a perspective view of the connection in Fig. 12A.

[0117] It should be understood, however, that the drawings are not intended to limit the claimed invention to the subject-matter depicted in the drawings.

[0118] In the drawings, like reference numerals have been used to indicate common parts, elements or features unless otherwise explicitly stated or implicitly understood by the context. Detailed description

[0119] In the following, one or more specific embodiments of the invention will be described in more detail with reference to the drawings. However, it is specifically intended that the invention is not limited to the embodiments and illustrations contained herein but includes modified forms of the embodiments including portions of the embodiments and combinations of elements of different embodiments as come within the scope of the following claims. It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementationspecific decisions must be made to achieve the developer’s specific goals, such as compliance with system and / or business-related constraints, which may vary from one implementation of the invention to another. Moreover, it should be appreciated that such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication and manufacture for the skilled person having the benefit of this disclosure.

[0120] Above-discussed preferred and / or optional features of each aspect of the invention may be used, alone or in appropriate combination, in the other aspects of the invention. This including that features described in relation to the transportable adsorber unit may be used together with the methods and vice versa.

[0121] In the following, the present invention has been exemplified by a first column in the form of an adsorber column and a second column in the form of a desorber column. However, the skilled person will understand that the first column and the second column may also be other kinds of columns as exemplified herein, such as, but not limited to: distillation columns, contactor or sweetening tower, regenerator column, stripping column or still column. Fig. 1A is a side perspective view of a transportable adsorber unit 10 according to a first aspect of the disclosure, where an adsorber column 70 of the transportable adsorber unit 10 is in an upright position.

[0122] Fig. IB is a side view of the transportable adsorber unit 10 in Fig. 1 A.

[0123] The transportable adsorber unit 10 is designed for removing a fluid from a gas stream. The transportable adsorber unit 10 can be a transportable amine unit 10 and the fluid to be removed can be CO2 or H2S. The CO2 or H2S can be removed from a stream of natural gas ar another stream where CO2 or H2S is present, such as an exhaust gas stream, a biogas, a syngas, ammonia etc. Alternatively, the transportable adsorber unit 10 can be a transportable glycol unit 10 and the fluid to be removed from the gas stream can be water.

[0124] The transportable adsorber unit 10 in Figs. 1A and IB is arranged on a transport unit 100 in the form of a truck 100 with wheels 102 for transport by road. The disclosed transportable adsorber unit 10 comprises an adsorber unit deck 50, a platform 60 movably arranged relative to the adsorber unit deck 50 and an adsorber column 70 having a center axis CAA. The adsorber column 70 is arranged on the platform 60 and the platform 60 is in a first position where it is parallel to the adsorber unit deck 50. The transportable adsorber unit 10 also comprises a tilting unit 40 configured to bring the adsorber column 70 between an upright position where the center axis CAA of the adsorber column 70 extends in a vertical direction VD (see Figs. 1 A and IB), and a transport position (see e.g. Figs. 2A and 2B) where the center axis CAA of the adsorber column 70 is inclined relative to the upright position.

[0125] When the first hydraulic cylinder 41 is in an extended position, the adsorber column 70 may be in the upright position and, when the first hydraulic cylinder 41 is in a retracted position, the adsorber column 70 may be in the transport position. There will also be intermediate positions between the upright position and the transport position, see Figs. 3A-3B and Figs. 4A-4B.

[0126] The transportable adsorber unit 10 may comprise a pin or similar locking the position of the platform 60, and thus the adsorber column 70, relative the adsorber unit deck 50 both in the upright position and in the transport position. One or more guy wires or guy cables (not shown), i.e. tensioned cables, may be used to add stability to the adsorber column 70 when in the upright position.

[0127] In order to be able to tilt the adsorber column 70, there may be reinforcements in the connection points between the adsorber column and the platform 60. The reinforcement may be in the form of more robust fastening means and or welds.

[0128] The disclosed tilting unit 40 features a first hydraulic cylinder 41 having a first end and a second end, where the first end is connected to the adsorber column 70 and the second end is connected to the adsorber unit deck 50. The first end can be pivotally connected to the adsorber column 70 and the second end can be pivotally connected to the adsorber unit deck 50.

[0129] The first hydraulic cylinder 41 may be operated by a hydraulic power unit 43 configured to extend and retract the first hydraulic cylinder 41 such that the adsorber column 70 moves between the upright position and the transport position.

[0130] Although not visible in Figs. 1A-1B (see e.g. Fig. 3A), the transportable adsorber unit 10 may comprise a second hydraulic cylinder 42 operating synchronous with the first hydraulic cylinder 41. Similar to the first hydraulic cylinder 41, the second hydraulic cylinder 42 features a first end and a second end, where the first end is connected to the adsorber column 70 and the second end is connected to the adsorber unit deck 50 and where the hydraulic power unit 43 is configured to operate the second hydraulic cylinder 42. The hydraulic power unit 43 operating the second hydraulic cylinder 42 may be the same hydraulic power unit 43 which operates the first hydraulic cylinder 41. Alternatively, the hydraulic power unit 43 operating the second hydraulic cylinder 42 may be different from the hydraulic power unit 43 which operates the first hydraulic cylinder 41.

[0131] Figs. 1A and IB also feature a desorber column 80 having a center axis CAD which is parallel to the center axis CAA of the adsorber column 70. The desorber column 80 is arranged on the same platform 60 as the adsorber column 70 such that the desorber column 80 follows any movement of the adsorber column 70 and the adsorber column 70 and the desorber column 80 are thus always parallel relative to each other. The tilting unit 40 is thus configured to bring the desorber column 80 between an upright position where the center axis CAD of the desorber column 80 extends in a vertical direction VD, and a transport position where the center axis CAD of the desorber column 80 is inclined relative to the upright position.

[0132] As shown in Fig. 3 A, it may be advantageous to connect the first and second hydraulic cylinders 41,42 to the adsorber column 70 since the adsorber column 70 normally has thicker walls than the desorber column 80.

[0133] Any connections between the adsorber column 70 and the desorber column 80 should be configured to account for thermal expansion since the adsorber column 70 and the desorber column 80 normally operate under different temperatures.

[0134] The transport unit 100 features a support surface 101 forming a support surface area 101A (shown with dotted lines in Fig. 1A). The adsorber column 70 (and the desorber column 80 if present) is arranged inside the support surface area 101A in the upright position.

[0135] Fig. 2A is a side perspective view of the transportable adsorber unit 10 according to the first aspect of the disclosure, where the adsorber column 70 is in a transport position. Fig. 2B is a side view of the transportable adsorber unit 10 in Fig. 2 A.

[0136] Referring to Figs. 2A and 2B, the center axis CAA of the adsorber column 70 (and the center axis CAD of the desorber column 80) extends in a horizontal direction HD.

[0137] As shown, the transportable adsorber unit 10 features a pivotable connection 61 pivotally connecting the platform 60 to the adsorber unit deck 50. The platform 60 is in a second position where it is perpendicular to the adsorber unit deck 50. The pivotally connection 61forming a pivotally connection axis.

[0138] This is clearly visible when comparing the position of the platform 60 relative to the adsorber unit deck 50 in Figs. 1A-1B vs. in Figs. 2A-2B. Similar to Fig. 1 A, the transport unit 100 features a support surface 101 forming a support surface area 101A (shown with dotted lines in Fig. 2A). The adsorber column 70 (and the desorber column 80 if present) is arranged inside the support surface area 101 A in the transport position.

[0139] Fig. 3 A is a side perspective view of the transportable adsorber unit 10 according to the first aspect of the disclosure, where the adsorber column 70 is tilted between the upright position and the transport position, forming an angle a of approximately 30 degrees relative a vertical axis (i.e. the upright position). Fig. 3B is a side view of the transportable adsorber unit 10 in Fig. 3A. Angle a in Figs. 3A and 3B defines the position where the center of mass of the adsorber column 70 (and the desorber column 80 if present) crosses the pivotable connection 61, that means, the point where the forces change direction.

[0140] Fig. 4A is a side perspective view of the transportable adsorber unit 10 according to the first aspect of the disclosure, where the adsorber column 70 is tilted between the upright position and the transport position, forming an angle of approximately 70 degrees relative a vertical axis (i.e. the upright position). Fig. 4B is a side view of the transportable adsorber unit 10 in Fig. 4A.

[0141] Fig. 5 is a top view of the transportable adsorber unit 10 in Figs. 1 A and IB with the adsorber column 70 in the upright position.

[0142] Fig. 6 is a top view of the transportable adsorber unit 10 in Figs. 2A and 2B with the adsorber column 70 in the transport position.

[0143] As seen in both Figs. 5 and 6, the adsorber column 70 (and the desorber column 80 if present) is arranged inside the support surface area 101A both when the adsorber column 70 is in the upright position as in Fig. 5 and in the transport position as in Fig- 6.

[0144] Fig. 7 is a side perspective view of a transportable adsorber unit 10 according to a second aspect of the disclosure, where an adsorber column 70 of the transportable adsorber unit 10 is in an upright position. The features of the transportable adsorber unit 10 according to the second aspect are identical to the features of the adsorber unit 10 according to the first aspect except that the transportable adsorber unit 10 is adapted for transport on other means than a truck with wheels, such as e.g. on a train, a boat etc.

[0145] Referring to Figs. 1-7, it is disclosed a method of preparing a transportable adsorber unit 10 as described above for transport, wherein the method comprises the steps of - operating the tilting unit 40 to move the adsorber column 70 from the upright position to the transport position. The method may further comprise, before operating the tilting unit (40), a step of:

[0146] - unlocking a locking means such that the platform 60 becomes pivotally movable relative the adsorber unit deck 50. The step of unlocking may include releasing any bolts, pins, screws or other fastening means securing the adsorber column in the upright position.

[0147] The method may comprise, after operating the tilting unit 40, a step of securing the adsorber column 70 in the transport position. The securing of the adsorber column

[0148] 70 may comprise using bolts, pins, screws or other fastening means.

[0149] Referring to Figs. 1-7, it is disclosed a method of installing a transportable adsorber unit 10 as described above at a fluid removal site, wherein the method comprises:

[0150] - operating the tilting unit 40 to move the adsorber column 70 from the transport position to the upright position. The fluid removal site may be e.g. CO2 or H2S removal site, or alternatively a water removal site.

[0151] The method of installing may comprise a step of:

[0152] - securing the adsorber column 70 in the upright position.

[0153] Figs. 8-11 are side perspective views of the transportable adsorber unit 10 according to the second aspect of the disclosure, where hoses 73 and pipes 71 between the adsorber column 70 and the desorber column 80 are better illustrated. The features of the transportable adsorber unit 10 are thus the same as the transportable adsorber unit 10 described in relation to Fig. 7.

[0154] In Fig. 8 the adsorber column 70 and the desorber column 80 are in an inclined intermediate position of about 30 degrees relative to the transport position .

[0155] Each of the adsorber column 70 the desorber column 80 may comprise inspection interfaces 74, 84 providing access to the interior of the respective columns 70,80.

[0156] In order to reduce the time for connection and disconnection, flexible hoses 64 are used to connect a first flange connection 62 on the tilting part (i.e. the platform 60 and the columns 70, 80) to a second flange connection 63 on the fixed part (i.e. the adsorber unit deck 50).

[0157] The flexible hoses 64 need to bend a lot (see example in Fig. 9) when bringing the adsorber column 70 and the desorber column 80 between the transport position and the upright position. Process hoses have a long bending radius, therefore it is normally required a lot of space for every flexible hose 64. There are a lot of process piping / pipes

[0158] 71 connecting to the adsorber column 70 and the desorber column 80 and each pipe will connect to a flexible hose 64, resulting in many flexible hoses that will occupy a space (i.e. the volume formed between the adsorber unit deck 50, the platform 60 and the lower part of the desorber column 80 (when in the transport position)) that is unfeasible. Since there are many flexible hoses 64, and the available space for bending of all of the flexible hoses 64 is limited, one of the flexible hose ends should be connected at or close to the pivotable connection 61 (also referred to as hinge axis). In Fig. 8 this is illustrated in that a first end 64’ of the flexible hose 64 is connected to the first flange connection 62 on the tilting part which and a second end 64’ of the flexible hose 64 is connected to the second flange connection 63. The second flange connection 63 is shown to be at, or close to the, pivotable connection 61.

[0159] In Fig. 9 the adsorber column 70 and the desorber column 80 are in the transport position.

[0160] As seen in Fig. 9, the transportable adsorber unit 10 features a number of pipes 71 connected to the adsorber column 70. The number of pipes 71 are arranged along an upper surface of the adsorber column 70 when the adsorber column 70 is in the transport position of Fig. 9. By arranging the pipes along an upper surface of the adsorber column 70, i.e. the column at the top, the risk of damaging the number of pipes between the adsorber column 70 and the adsorber unit deck 50, between the adsorber column 70 and the desorber column 80, or between any of the columns 70, 80 and the first hydraulic or second cylinder 41,42, is significantly reduced.

[0161] Further referring to Fig. 9, when the adsorber column 70 and the desorber column 80 are in the transport position, the adsorber column 70 is arranged at a higher elevation than the desorber column 80. This is due to that the column with relatively higher inertia momentum, i.e. the adsorber column 70 in this case, shall be arranged above the column with the relatively lower inertia momentum, i.e. the desorber column 80 in this case, due to the rigidity and potentially larger diameter of the adsorber column 70 relative to the desorber column 70.

[0162] In Fig. 10 the adsorber column 70 and the desorber column 80 are in an inclined intermediate position of about 60 degrees relative to the transport position.

[0163] In Fig. 11 the adsorber column 70 and the desorber column 80 are in the upright position.

[0164] Referring to Figs. 8-11, it is shown that the adsorber column 70 features an access point 72 for fluid communication between an inside of the adsorber column 70 and an outside of the adsorber column 70. The access point 72 is shown as a flange connection 72 which enables easy connection and disconnection of a first end of a first end of pipe section 73. A second end of the pipe section 73 is connectable to a pipe of the number pipes 71 thereby providing fluid communication between the inside of the adsorber column 70 and the pipe. In order to account for potentially different thermal expansion of the adsorber column 70 and the desorber column 80, as well as other possible changes of relative positions of the number of pipes 71 and the access point 72, the pipe section 73 is preferably a flexible pipe. Fig. 12A is a top view of section A in Fig. 8 illustrating a connection 90 between the adsorber column 70 and the desorber column 80 being in the form of sliding pieces. The sliding pieces are exemplified as a T-connection 91 connected to the adsorber column 70. The T-connection 91 is configured to move inside a complementary T-shaped guide on recess part 92. The recess part 92 is connected to the adsorber column 80. Thereby the adsorber column 70 can move relative to the desorber column 80 in a direction parallel to the center axes CAA,CAD of the adsorber column 70 and the desorber column 80.

[0165] Fig. 12B is a perspective view of the connection in Fig. 12A.

[0166] The transportable adsorber unit 10 features connections 90 between the adsorber column 70 and the desorber column 80 for connecting the adsorber column 70 and the desorber column 80 to each other. The connections 90 are preferably configured to account for thermal expansion such that they do not break if one of the columns 70,80 expand or retract differently. The connections 90 may be in the form of sliding pieces or other flexible connections.

[0167] In the preceding description, various aspects of the invention have been described with reference to the illustrative embodiment. For purposes of explanation, specific numbers, systems and configurations were set forth in order to provide a thorough understanding of its workings. However, this description is not intended to be construed in a limiting sense. Various modifications and variations of the illustrative embodiment, as well as other embodiments, which are apparent to person skilled in the art to which the disclosed subject-matter pertains, are deemed to lie within the scope of the present invention as defined by the following claims.

[0168] CLAUSES:

[0169] 1. A transportable adsorber unit (10) for removing a fluid from a gas stream, the transportable adsorber unit (10) being configured to be arranged on a transport unit (100), wherein the transportable adsorber unit (10) comprises:

[0170] - an adsorber unit deck (50);

[0171] - a platform (60) movably arranged relative to the adsorber unit deck (50);

[0172] - an adsorber column (70) having a center axis (CAA), wherein the adsorber column (70) is arranged on the platform (60);

[0173] - a tilting unit (40) configured to bring the adsorber column (70) between: i. an upright position where the center axis (CAA) of the adsorber column (70) extends in a vertical direction (VD), and ii. a transport position where the center axis (CAA) of the adsorber column (70) is inclined relative to the upright position.

[0174] 2. The transportable adsorber unit (10) according to clause 1, wherein the transportable adsorber unit (10) is a transportable amine unit (10) and the fluid to be removed is CO2 or H2S.

[0175] 3. The transportable adsorber unit (10) according to clause 2, wherein the gas stream is a stream of natural gas.

[0176] 4. The transportable adsorber unit (10) according to clause 1, wherein the transportable adsorber unit (10) is a transportable glycol unit (10) and the fluid to be removed is water.

[0177] 5. The transportable adsorber unit (10) according to any of the preceding clauses, wherein, when in the transport position, the center axis (CAA) of the adsorber column (70) extends in a horizontal direction (HD).

[0178] 6. The transportable adsorber unit (10) according to any of the preceding clauses, wherein transportable adsorber unit (10) comprises a pivotable connection (61) pivotally connecting the platform (60) to the adsorber unit deck (50).

[0179] 7. The transportable adsorber unit (10) according to any of the preceding clauses, wherein the tilting unit (40) comprises:

[0180] - a first hydraulic cylinder (41) having a first end and a second end, wherein the first end is connectable to the adsorber column (70) and the second end is connectable to the adsorber unit deck (50); and

[0181] - a hydraulic power unit configured to operate the first hydraulic cylinder (41).

[0182] 8. The transportable adsorber unit (10) according to clause 7, wherein, when the first hydraulic cylinder (41) is in an extended position, the adsorber column (70) is in the upright position and, when the first hydraulic cylinder (41) is in a retracted position, the adsorber column (70) is in the transport position.

[0183] 9. The transportable adsorber unit (10) according to any one of clauses 7-8, wherein the first end of the first hydraulic cylinder (41) is pivotally connected to the adsorber column (70) and the second end of the first hydraulic cylinder (41) is pivotally connected to the adsorber unit deck (50).

[0184] 10. The transportable adsorber unit (10) according to clause 9, wherein the first end of the first hydraulic cylinder (41) is pivotally connected to the adsorber column (70) in a fixed point of the adsorber column (70) and the second end of the first hydraulic cylinder (41) is pivotally connected to the adsorber unit deck (50) in a fixed point of the adsorber unit deck (50).

[0185] 11. The transportable adsorber unit (10) according to any one of clauses 7-9, wherein the adsorber column (70) comprises a slidable interface for connection to the first end of the first hydraulic cylinder (41), such that, when connected, the first end of the first hydraulic cylinder (41) is slidable relative the adsorber column (70).

[0186] 12. The transportable adsorber unit (10) according to clause 6, or any one of clauses 7-8 when dependent upon clause 6, wherein the platform (60) is movable between a first position where it is parallel to the adsorber unit deck (50) and a second position where it is perpendicular to the adsorber unit deck (50).

[0187] 13. The transportable adsorber unit (10) according to any of the preceding clauses, wherein the transportable adsorber unit (10) comprises a desorber column (80) having a center axis (CAD), wherein the desorber column (80) is arranged on the same platform (60) as the adsorber column (70) and wherein the tilting unit (40) is configured to bring the desorber column (80) between:

[0188] - an upright position where the center axis (CAD) of the desorber column (80) extends in a vertical direction (VD), and

[0189] - a transport position where the center axis (CAD) of the desorber column (80) is inclined relative to the upright position. 14. The transportable adsorber unit (10) according to clause 13 when dependent on any one of clauses 7-11, wherein the tilting unit (40) comprises:

[0190] - a second hydraulic cylinder (42) operating synchronous with the first hydraulic cylinder (41), wherein the second hydraulic cylinder (42) has a first end and a second end, wherein the first end is connectable to the adsorber column (70) and the second end is connectable to the adsorber unit deck (50); and wherein the hydraulic power unit is configured to operate the second hydraulic cylinder (42).

[0191] 15. A transport unit (100) comprising a transportable adsorber unit (10) according to any one of clauses 1-14, wherein the transport unit (100) comprises a support surface (101) forming a support surface area (101A) and wherein the adsorber column (70) is arranged inside the support surface area (101 A) both when in the upright position and in the transport position.

[0192] 16. The transport unit (100) according to clause 15, wherein the transport unit (100) comprises wheels (102) for road transport.

[0193] 17. A method of preparing a transportable adsorber unit (10) according to any one of clauses 1-14 for transport, wherein the method comprises the steps of:

[0194] - operating the tilting unit (40) to move the adsorber column (70) from the upright position to the transport position.

[0195] 18. The method according to clause 17, wherein the method comprises, before operating the tilting unit (40), a step of:

[0196] - unlocking a locking means such that the platform (60) becomes pivotally movable relative the adsorber unit deck (50).

[0197] 19. The method according to clause 17 or 18, wherein the method comprises, after operating the tilting unit (40), a step of securing the adsorber column (70) in the transport position.

[0198] 20. A method of installing a transportable adsorber unit (10) according to any one of clauses 1-14 at a fluid removal site, wherein the method comprises: - operating the tilting unit (40) to move the adsorber column (70) from the transport position to the upright position.

[0199] 21. The method according to clause 20, wherein the method comprises a step of: - securing the adsorber column (70) in the upright position.

[0200] List of references:

Claims

CLAIMS1. A transportable fluid treatment unit (10) for removing a fluid from a stream, the transportable fluid treatment unit (10) being configured to be arranged on a transport unit (100), wherein the transportable fluid treatment unit (10) comprises:- a unit deck (50);- a platform (60) movably arranged relative to the unit deck (50);- a first column (70) having a center axis (CAA), wherein the first column (70) is arranged on the platform (60);- a second column (80) having a center axis (CAD), wherein the second column (80) is arranged on the same platform (60) as the first column (70);- a tilting unit (40) configured to bring the first column (70) and the second column (80) between: i. an upright position where the center axis (CAA) of the first column (70) and the center axis (CAD) of the second column (80) extend in a vertical direction (VD), and ii. a transport position where the center axis (CAA) of the first column (70) and the center axis (CAD) of the second column (80) are inclined relative to the upright position.

2. The transportable fluid treatment unit (10) according to claim 1, wherein the first column (70) is an adsorber column (70) and the second column (80) is a desorber column (80).

3. The transportable fluid treatment unit (10) according to claim 2, wherein the transportable fluid treatment unit (10) is a transportable amine unit (10) and the fluid to be removed is CO2 or H2S.

4. The transportable fluid treatment unit (10) according to claim 3, wherein the stream is a stream of natural gas.

5. The transportable fluid treatment unit (10) according to claim 1 or claim 2, wherein the transportable fluid treatment unit (10) is a transportable glycol unit (10) and the fluid to be removed is water.

6. The transportable fluid treatment unit (10) according to claim 1, wherein the first column (70) and the second column (80) are distillation columns.

7. The transportable fluid treatment unit (10) according to any of the preceding claims, wherein, when in the transport position, the center axis (CAA) of the first column (70) and the center axis (CAD) of the second column (80) extend in a horizontal direction (HD).

8. The transportable fluid treatment unit (10) according to any of the preceding claims, wherein the transportable fluid treatment unit (10) comprises a pivotable connection (61) pivotally connecting the platform (60) to the unit deck (50).

9. The transportable fluid treatment unit (10) according to any of the preceding claims, wherein the tilting unit (40) comprises:- a first hydraulic cylinder (41) having a first end and a second end, wherein the first end is connectable to the first column (70) and the second end is connectable to the unit deck (50); and- a hydraulic power unit (43) configured to operate the first hydraulic cylinder (41).

10. The transportable fluid treatment unit (10) according to claim 9, wherein, when the first hydraulic cylinder (41) is in an extended position, the first column (70) and the second column (80) are in the upright position and, when the first hydraulic cylinder (41) is in a retracted position, the first column (70) and the second column (80) are in the transport position.

11. The transportable fluid treatment unit (10) according to any one of claims 9- 10, wherein the first end of the first hydraulic cylinder (41) is pivotally connected to the first column (70) and the second end of the first hydraulic cylinder (41) is pivotally connected to the unit deck (50).

12. The transportable fluid treatment unit (10) according to claim 11, wherein the first end of the first hydraulic cylinder (41) is pivotally connected to the first column (70) in a fixed point of the first column (70) and the second end of the first hydraulic cylinder (41) is pivotally connected to the unit deck (50) in a fixed point of the unit deck (50).

13. The transportable fluid treatment unit (10) according to any one of claims 9- 12, wherein the first column (70) comprises a slidable interface for connection to the first end of the first hydraulic cylinder (41), such that, when connected, the first end of the first hydraulic cylinder (41) is slidable relative the first column (70).

14. The transportable fluid treatment unit (10) according to claim 8, or any one of claims 9-13 when dependent upon claim 8, wherein the platform (60) is movable between a first position where it is parallel to the unit deck (50) and a second position where it is perpendicular to the unit deck (50).

15. The transportable fluid treatment unit (10) according to any one of claims 9- 14, wherein the tilting unit (40) comprises:- a second hydraulic cylinder (42) operating synchronous with the first hydraulic cylinder (41), wherein the second hydraulic cylinder (42) has a first end and a second end, wherein the first end is connectable to the first column (70) and the second end is connectable to the unit deck (50); and wherein the hydraulic power unit (43) is configured to operate the second hydraulic cylinder (42).

16. The transportable fluid treatment unit (10) according to any of the preceding claims, wherein the transportable fluid treatment unit (10) comprises a number of pipes (71) connected to the first column (70), and wherein the number of pipes (71) are arranged along an upper surface of the first column (70) when the first column (70) is in the transport position.

17. The transportable fluid treatment unit (10) according to claim 16, wherein the first column (70) comprises an access point (72) for fluid communication between an inside of the first column (70) and an outside of the first column (70).

18. The transportable fluid treatment unit (10) according to claim 17, wherein the transportable fluid treatment unit (10) comprises a pipe section (73) and wherein a first end of the pipe section (73) is connectable to the access point (72) and a second end of the pipe section (73) is connectable to a pipe of the number pipes (71).

19. The transportable fluid treatment unit (10) according to claim 17 or 18, wherein the access point (72) comprises a flange connection.

20. The transportable fluid treatment unit (10) according to any of the preceding claims, wherein, when the first column (70) and the second column (80) are in the respective transport positions, the first column (70) is arranged at a higher elevation than the second column (80).

21. The transportable fluid treatment unit (10) according to any of the preceding claims, wherein the transportable fluid treatment unit (10) comprises connections (90) between the first column (70) and the second column (80)for connecting the first column (70) and the second column (80) to each other, and wherein the connections (90) are configured to account for thermal expansion.

22. The transportable fluid treatment unit (10) according to claim 21, wherein the connections (90) are in the form of sliding pieces.

23. The transportable fluid treatment unit (10) according to claim 8, or any one of claims 9-22 when dependent on claim 8, comprising:- a first flange connection (62) arranged at or on the platform (60);- a second flange connection (63) arranged on the unit deck (50) at or close to the pivotable connection (61);- a flexible hose (64) having a first end (64’) connected to the first flange connection (62) and a second end (64’) connected to the second flange connection (63).

24. A transport unit (100) comprising a transportable fluid treatment unit (10) according to any one of claims 1-23, wherein the transport unit (100) comprises a support surface (101) forming a support surface area (101A) and wherein the first column (70) is arranged inside the support surface area (101 A) both when in the upright position and in the transport position.

25. The transport unit (100) according to claim 24, wherein the transport unit (100) comprises wheels (102) for road transport.

26. A method of preparing a transportable fluid treatment unit (10) according to any one of claims 1-23 for transport, wherein the method comprises the steps of- operating the tilting unit (40) to move the first column (70) and the second column (80) from the upright position to the transport position.

27. The method according to claim 26, wherein the method comprises, before operating the tilting unit (40), a step of- unlocking a locking means such that the platform (60) becomes pivotally movable relative the unit deck (50).

28. The method according to claim 264 or 27, wherein the method comprises, after operating the tilting unit (40), a step of securing the first column (70) in the transport position.

29. A method of installing a transportable fluid treatment unit (10) according to any one of claims 1-23 at a fluid removal site, wherein the methodcomprises:- operating the tilting unit (40) to move the first column (70) and the second column (80) from the transport position to the upright position.

30. The method according to claim 29, wherein the method comprises a step of:- securing the first column (70) in the upright position.

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