Biogas installation fermenter container and method for operating same

Abstract

The invention relates to a biogas installation fermenter container (1) with a container interior (3), in which a substantially liquid fermentable substrate (7) can be received, and at least one vertical immersion device guiding mast (17), which is at least partly received in the container interior (3) and is aligned in the direction of the vertical axis. According to the invention, the immersion device guiding mast (17) is designed to guide and support multiple immersion devices, which can be vertically adjusted thereon in the guiding mast longitudinal direction by means of a height-adjusting device, and has at least two profiled carriage guides (22, 23), preferably precisely two profiled carriage guides, which are mutually spaced and run in the guiding mast longitudinal direction and on each of which at least one immersion device (26, 27) can be vertically adjusted by means of a carriage (24, 25). Immersion devices (26, 27) on different profiled carriage guides (22, 23) can be displaced and / or vertically adjusted independently of each other by means of the height-adjusting device.

Description

[0001] Description

[0002] Biogas plant fermenter tanks and operating procedures

[0003] The invention relates to a biogas plant fermenter tank according to the preamble of claim 1 and to a method for operating a biogas plant fermenter tank according to the preamble of claim 44.

[0004] Generic biogas plant fermenter tanks with a service device are known, for example, from EP 2 174 704 B1 and WO 2019 / 149891 A1. Such known biogas plant fermenter tanks with a service device have a tank interior formed by a bottom wall, a circumferential side wall, and a roof, in particular a film roof, connected thereto in a gas-tight manner. A substantially liquid, fermentable substrate is accommodated in the tank interior. The service device has a service platform as a walkable, flat platform plate, which is connected on the one hand to a tank side wall at the top in a gas-tight manner and on the other hand has a roof connection area to which the roof, in particular a film roof, is connected in a gas-tight manner. Located in the platform plate is a service device which can be closed in a gas-tight manner by means of a cover device with a service housing projecting above the platform plate.

[0005] At least one vertically positioned submersible device guide mast, which extends from below through the hole-like service opening into the service housing, is mounted on the base of the housing. A submersible device, in particular a submersible mixer and / or a feed pump of an injection device, is mounted on the submersible device guide mast in a height-adjustable manner and can be moved out of the fermenter tank and back into the fermenter tank through the service opening for maintenance and service work.

[0006] The diving device guide masts in the generic biogas plant fermenter tanks are designed as square tubes and can be pivoted about their vertical axes and fixed in preset pivot positions. The diving devices are height-adjustable on the square tubes using slides integrated into the diving device or connected to the diving device, which encircle the square tube. Height adjustment is usually achieved via cable pulleys located at the upper end of the guide mast. Arrangements of the cable pulleys inside and outside the service housing are known.

[0007] In practice, only one submersible device, particularly a submersible mixer, can be arranged and guided in a height-adjustable manner on a square tube mast. However, the required stirring function and mixing of the substrate would often require several, in particular two, submersible mixers. In order to achieve the required stirring function and mixing of the substrate with the usual arrangement of a single submersible device, in particular a single submersible mixer, on a square tube guide mast, relatively large, energy-intensive submersible mixers with large agitator blades are required. This in turn disadvantageously requires a relatively large service opening through which a submersible mixer can be moved out of the fermenter tank. In addition, variation in the control of the mixing function in the area of ​​a guide mast is only possible to a limited extent with only one submersible mixer.

[0008] The object of the invention is therefore to further develop a biogas plant fermenter tank in such a way that structural freedom is created for the arrangement of submersible devices with reduced dimensions, combined with simplified handling and / or combined with variable control options for the submersible devices. A further object of the invention is to propose a suitable method for operating such a biogas plant fermenter tank.

[0009] This problem is solved by the features of the independent claims. Advantageous further developments are the subject of the dependent claims.

[0010] According to claim 1, a biogas plant fermenter tank is provided with a tank interior in which a substantially liquid, fermentable substrate can be accommodated, and with at least one vertical diving device guide mast, at least partially accommodated in the tank interior and oriented in the vertical axis direction. According to the invention, the diving device guide mast is designed to guide and hold a plurality of diving devices, the height of which can be adjusted thereon in the longitudinal direction of the guide mast by means of a height adjustment device, and has at least two, preferably exactly two, spaced-apart carriage guide profiles extending in the longitudinal direction of the guide mast, on each of which at least one diving device can be arranged in a height-adjustable manner by means of a carriage. Diving devices arranged on different carriage guide profiles can be displaced and / or adjusted in height independently of one another by means of the height adjustment device.

[0011] According to the invention, it is therefore provided that a single diving device guide mast has a profile mast with several slide guide profiles, on each of which, depending on the intended use and application, one or more diving devices can be arranged. This means that in conjunction with the solution according to the invention, it is always possible to arrange more than just one diving device on each slide guide profile or, alternatively, to arrange only a single diving device on one of the slide guide profiles and leave the other slide guide profiles free. For effective mixing of the substrate, it is of course generally preferable to arrange at least one diving device on each of the slide guide profiles, since better and more effective mixing is possible with several diving devices, especially when these are arranged at different heights.The use of several diving equipment guide masts for arranging several diving equipment can therefore be advantageously dispensed with.

[0012] In addition, the solution according to the invention results in significantly greater flexibility with regard to the use of several submersible devices, which can not only be arranged at different heights, but can also be of different dimensions and / or differently aligned and / or differently designed, for example, on the one hand, they can be formed by a submersible mixer with a stirring blade and on the other hand by a submersible pump, to give only a first arbitrarily chosen example.Furthermore, for example, a submersible agitator with agitator blade can be arranged on each of the slide guide profiles and, in addition, a feed pump of an injection device, which will be explained in more detail below, can be arranged on one of these slide guide profiles, so that in this example a total of three submersible devices are arranged on the submersible device guide mast, to give just one further example that shows the high individuality and flexibility of the guide mast solution according to the invention.

[0013] The present inventive concept therefore allows for the selection and arrangement of multiple immersion devices, structurally, in terms of manufacturing and cost, to be carried out simply using a single immersion device guide mast and individually adapted to the specific stirring, mixing, and possibly also injection tasks at hand. With such a profile mast, the immersion devices, in particular the submersible mixers with their agitator blades, can also be dimensioned comparatively smaller than is the case with a single immersion device or submersible mixer. This also allows for a preferably existing service opening or a possibly existing service chamber to be dimensioned comparatively smaller, preferably also with a correspondingly assigned, more compact service housing.

[0014] Preferably, the slide guide profiles are connected to one another at least in regions or at least partially by means of at least one connecting element, as viewed in the longitudinal direction of the guide mast. Specifically, the slide guide profiles can be connected to one another by means of at least one substantially continuous web as a connecting element, as viewed in the longitudinal direction of the guide mast. In this embodiment, the diving device guide mast is then designed in the manner of a profile beam.

[0015] Alternatively, the slide guide profiles can also be connected to each other by means of several rods or webs as connecting elements, viewed in the longitudinal direction of the guide mast. In this alternative embodiment, the diving device guide mast is then essentially designed as a truss girder.

[0016] Particularly preferably, the diving equipment guide mast has, at least in some areas, preferably at least in the adjustment range of the diving equipment, an H-profile in the manner of a double-T profile, the upper and lower chords of which, connected by at least one connecting element, preferably by at least one web, form the carriage guide profiles. This is expressly intended to include embodiments in which, for example, two dovetail longitudinal profiles or, if appropriate, tubes are connected along their length to form a diving equipment guide mast. The term H-profile is therefore expressly to be interpreted in a comprehensive manner and in a broad sense, namely as a profile that forms an undercut that can be gripped by a carriage from two sides.In addition, submersible device guide masts designed in this way, particularly as steel girders, are very stable and rigid, so that the relatively large reaction forces in a submersible mixer can advantageously be supported on the submersible device guide mast without deflection and without oscillating movements. Furthermore, according to a particularly preferred specific embodiment, at least one, preferably exactly one, submersible device is provided per slide guide profile, each of which is formed by a mixer with a rotary-driven impeller. As already mentioned, this makes it possible to achieve thorough mixing and therefore a very good mixing result, especially in conjunction with smaller-sized submersible devices. This is particularly successful when the impellers of the submersible devices designed as submersible mixers are aligned in the assembled state so that the axes of rotation of the impellers point in approximately the same direction.

[0017] Depending on the design, a diving device with its associated carriage can form a single structural unit or be constructed in multiple parts, particularly two parts. In the latter case, the diving device can then be easily separated from the associated carriage, for example, to replace the diving device.

[0018] Even greater flexibility in the use of submersible devices, and thus even better adaptation to the respective mixing tasks, is achieved with a design in which the submersible device, in particular a submersible motor mixer with a mixing blade, is arranged on the associated carriage so that it can be pivoted upwards and / or downwards as viewed in the vertical axis. The pivoting range can be individually specified and is preferably at least in the range of 15 to 30°, starting from the horizontal position. Furthermore, pivoting ranges (upwards and / or downwards) of, for example, up to 90°, again starting from the horizontal position, can also be provided, which is then advantageous, for example, in conjunction with correspondingly smaller dimensions of a service room or service opening of a service facility, which is described in more detail below. This is because the size of both a service room and a service opening can be reduced.a service opening and thus an associated service housing can be significantly reduced.

[0019] According to a preferred specific embodiment, the fermenter tank is designed as a container that is at least partially open at the top. In conjunction with such a configuration, a container opening of the upwardly open fermenter tank can then be covered by a roof, preferably by a film roof, and preferably covered in a gas-tight manner. Furthermore, a service device is provided that forms part of the roof and / or is arranged in the region of the roof and has a walkable, preferably flat, platform plate as a service platform. Furthermore, the diving device can be moved into the area of ​​the roof-side service device by means of the height adjustment device, in particular for maintenance and service work.In conjunction with such a roof-side service facility, maintenance and service work on the diving equipment can be carried out easily, without any significant interruption to the operation of a biogas plant or without having to enter the interior of the tank.

[0020] In the event that the container interior of the fermenter container is formed in a conventional manner by a bottom wall and a circumferential side wall, it is advantageous if the service device is connected to the side wall on the one hand, preferably in a gas-tight manner, and the service device on the other hand has a roof connection area to which the roof is connected, preferably in a gas-tight manner.

[0021] In order to make maintenance and service work on the diving equipment even easier, it is provided that the service device, preferably the platform plate, has or forms a service chamber, for example a service opening as a service chamber, which can be closed with a preferably openable, preferably gas-tight cover device. The at least one diving device arranged in a height-adjustable manner on the diving device guide mast can then be relocated into the area of ​​the service chamber and / or can then be arranged in the area of ​​the service chamber for access from outside the service chamber. It is preferably provided that the service chamber, preferably formed by a service opening, is suitable and designed such that the at least one diving device arranged in a height-adjustable manner on the diving device guide mast can be moved through the service chamber out of the fermenter tank and back into the fermenter tank.

[0022] The latter is achieved in conjunction with several diving devices arranged on the diving device guide mast on different slide guide profiles, particularly if the diving device guide mast can be pivoted about its longitudinal axis by means of a pivoting device, in particular pivoted in such a way that diving devices arranged on different slide guide profiles can be displaced, viewed in the vertical axis direction, into the area of ​​the service room. Furthermore, it can preferably be provided that the diving device guide mast can be fixed in a set pivot position.

[0023] As the above statements show, the term service space is to be understood in a broad sense and in the case of the present invention it includes, but is not limited to, service openings in the form of hole-like recesses in the platform plate, but expressly also any space formed by the service device, if necessary also in conjunction with such a service opening, in the area of ​​which a diving device can be relocated for maintenance and service purposes and via which access to the diving device is possible, thus expressly also free spaces which arise, for example, because a frame supporting and / or carrying the platform plate extends beyond the actual platform plate and thus the diving device can be relocated into this free space between the frame and the platform plate, which will be explained in more detail below.In short, the term "service space" here encompasses any free space or area formed by a service device and into and / or through which diving equipment can be relocated or moved for maintenance and service purposes. It therefore includes not only conventional service openings, although these, of course, also form or co-form a service space and are therefore encompassed by the term "service space." Furthermore, the term "service opening" itself, particularly in connection with the platform plate, is to be understood in a broad sense and includes, but is not limited to, service openings in the form of hole-like recesses in the platform plate, but also explicitly edge-side recesses or edge-side cutouts on the platform plate itself, as will be explained in more detail later.

[0024] According to a particularly preferred specific embodiment, the diving equipment guide mast extends from below into the service room, viewed in the vertical axis direction, and is pivotably mounted on the service device by means of an upper guide mast section (relative to the vertical axis direction), preferably pivotably mounted by means of a pivot bearing of the pivot device. This provides an overall compact structure, which makes it easy to move the diving equipment into the service room area as desired.

[0025] The height adjustment device can have a rotationally driven, preferably controlled rotationally driven, cable pulley with a traction cable for each diving device, which is connected to the associated carriage and / or to the diving device. With such a cable pulley and traction cable arrangement, a particularly simple and reliable height adjustment of the diving devices can be achieved. For a compact design, the cable pulleys are arranged on the diving device guide mast in an upper guide mast area relative to the vertical axis. In principle, the cable pulleys can be arranged such that they are located outside the fermenter tank, but this then results in a relatively complex cable feedthrough, in particular a relatively complex gas-tight cable feedthrough, from the outside into the tank interior, especially in conjunction with a pivoting diving device guide mast.Accordingly, it is particularly preferred that the cable pulleys are arranged in the vessel interior, preferably within the service housing. Each cable pulley is preferably assigned a cable pulley drive, with the cable pulley drives preferably being arranged outside the fermenter vessel, preferably on a pivot bearing of the submersible device guide mast, and being drivingly connected to the respective cable pulley arranged in the vessel interior, preferably within the service housing.

[0026] Furthermore, the diving equipment guide mast can be mounted with a lower guide mast section, relative to the vertical axis, on the bottom side, preferably in the area of ​​a bottom wall of the vessel's interior. This design then provides a particularly advantageous lower mounting and support for the diving equipment guide mast, which is characterized above all by very high functional reliability.

[0027] The cover device can in principle also be formed merely by an openable lid that closes a conventional, for example rectangular and / or hole-shaped, service opening in the platform plate. However, service and maintenance work cannot usually be carried out particularly conveniently using this, and a worker must, for example, kneel or lie down to reach into the interior of the fermenter vessel. Accordingly, according to a particularly preferred embodiment, the cover device is formed by a service housing arranged above the platform plate, preferably projecting upwards from the platform plate in the vertical axis direction. With such a service housing, maintenance and service work can be carried out particularly easily and essentially while standing on the platform plate. Cumbersome and uncomfortable intervention into the interior of the fermenter vessel is then generally not necessary.

[0028] Such a service housing can in principle be formed by a separate housing arranged on the platform plate, as is known, for example, from WO 2019 / 149891 A1. However, the structural complexity here is relatively high, since in addition to a mounting wall, a separate mast housing must also be formed. Accordingly, according to a particularly preferred embodiment of the invention, it is proposed that the platform plate have a mounting wall which projects upwards from the platform plate in the vertical axis direction in the region of the service space, wherein the service housing forms an integral part of the mounting wall and / or is directly adjacent to the mounting wall, preferably adjoining it towards the front in the direction of the container side wall.This allows for advantageous functional integration and component reduction simply by having a portion of the mounting wall, in a preferred dual function, simultaneously form a component of the service housing. For example, this upwardly projecting mounting wall can also be formed by only a portion of the mounting wall, for example, by a mounting wall section that, relative to the vertical axis, projects essentially vertically upward.

[0029] The mounting wall here is preferably a type of multifunctional wall that can also fulfill other functions in conjunction with the service facility. For example, it can be used to secure at least one partial area of ​​a roof, in particular a membrane roof. Furthermore, a section of the mounting wall that is oriented essentially vertically upwards is particularly well-suited for incorporating viewing windows such as portholes. Furthermore, additional functional units, such as a gas extraction system, an emergency gas outlet, or an injection device and their associated components, can advantageously be arranged in the area of ​​the mounting wall. The integration of the service housing into the mounting wall thus results in a high level of functional integration in conjunction with a service facility that functions as a toolbox.

[0030] According to a particularly preferred specific embodiment, the mounting wall can have a mounting wall recess in the area of ​​the service chamber, preferably in the area above a service opening formed by a recess in the platform plate at the edge, so that the service housing is then open to the vessel interior. This is preferably done in such a way that the service housing only partially encloses a service opening, preferably formed by a recess in the platform plate at the edge, and is open to the vessel interior. If, in this alternative, the service housing is opened for maintenance and service work, this provides direct access to the gas space of the fermenter vessel.

[0031] If the latter is not desired, then according to an alternative embodiment in this regard, it can be provided that the mounting wall runs continuously in the area of ​​the service room and forms a fixed rear wall or a fixed rear wall area of ​​the service housing, preferably in such a way that the service housing completely encloses a service opening formed in the platform plate at the edge and / or is connected in a tube-like manner to a service opening formed in the platform plate, upwards in the vertical axis direction.In such a structure with a rear wall and a service opening formed in the platform plate, in which the service housing is then optionally not open to the vessel interior, a sealing element arranged around the service opening and projecting downwards into the vessel interior in a shaft-like manner can then also be provided as a gas apron. This sealing element is immersed in the liquid substrate to be fermented in the fermenter vessel at least during maintenance and service work and separates the gas phase region enclosed in a ring by the sealing element below the service opening and above the substrate in a gas-tight manner from the remaining gas phase region of the vessel interior. The sealing element can either be flexible or, preferably, be formed by a rigid, non-displaceable and inflexible pipe socket-like collar that permanently projects from the service opening towards the vessel interior.

[0032] According to a specific embodiment, the service housing itself can have at least one service housing wall which adjoins the mounting wall to form the service housing, preferably adjoins the mounting wall towards the front in the direction of the container side wall. For example, such a service housing wall can be single-shell and / or spike- or dome-shaped. However, a particularly preferred embodiment is one in which the at least one service housing wall has two housing side wall regions which adjoin the mounting wall at a distance from one another, preferably in such a way that the two housing side wall regions extend away from the mounting wall. The at least one housing service wall further has a housing front wall region which connects the two housing side wall regions to one another on the side facing away from the mounting wall.This makes it possible to provide a desired box-shaped structure by means of which service and maintenance work can be carried out particularly easily and advantageously, especially when the diving device is relocated to the interior of the service housing.

[0033] The two housing side wall sections and the housing front wall section preferably follow the course of a service opening facing them on the platform plate side and / or directly border on a service opening facing them on the platform plate side. This results in an overall compact and slim design for the service housing, which is easy to implement in terms of manufacturing.

[0034] For particularly preferred accessibility to the interior of the service housing, it is advantageous if at least a portion of the housing front wall area, preferably substantially the entire housing front wall area, is designed as a detachable and / or removable sloping wall that is inclined backwards toward the mounting wall relative to the vertical axis. This not only leads to easier handling when opening the service compartment, but also offers particularly advantageous access to and intervention in the interior of the service housing when a diving device is relocated into the housing interior.Accordingly, according to a particularly preferred embodiment, it is advantageous if the detachable and / or removable inclined wall, based on the vertical axis direction, slopes downwards from an upper region close to the mounting wall, preferably from an upper region of the mounting wall, in the direction of the platform plate, as well as forwards, in the direction away from the mounting wall. For a particularly large-area design of the detachable and / or removable inclined wall and thus for convenient access to the service housing and thus the service space, it is advantageous if the inclined wall, starting from an upper region close to the mounting wall, preferably directly starting from an upper region of the mounting wall, extends diagonally downwards to the platform plate, in particular to a front edge region of a platform plate-side service opening facing away from the mounting wall.

[0035] As already explained above, the mounting wall preferably has multiple functionalities, resulting in a high level of functional integration, particularly in conjunction with a service facility designed as a toolbox. For example, in this context, the mounting wall can have an upper wall region, relative to the vertical axis direction, which is essentially horizontally aligned and / or on which the diving equipment guide mast is pivotally mounted, preferably pivotally mounted by means of a pivot bearing. Furthermore, this upper wall region can extend essentially over the entire length of the mounting wall and have at least one connection for a functional unit, in particular for a gas vent and / or an emergency gas discharge as a functional unit. In addition, as already explained above, the mounting wall serves as a roof connection region for at least a partial area of ​​a roof, in particular a foil roof.For this purpose, according to a particularly preferred specific embodiment, the mounting wall has a wall section that projects upwards from the horizontally oriented upper wall region in the vertical axis direction. It is particularly preferred that the upwardly extending wall section forms a partial region of a roof connection region. According to a preferred specific embodiment, the platform plate has a first base side, preferably as a longer base side, which faces the container side wall, preferably adjoins the container side wall. Furthermore, the platform plate has a second base side, preferably as a shorter base side, which lies opposite the first base side.In conjunction with such a construction of the platform plate, the mounting wall extends at least over the second base side, preferably over the second base side and further at least partially along the platform plate sides in the direction of the first base side. In this case, it can then optionally be further provided that the mounting wall slopes from the second base side to the first base side, in particular slopes downwards, in order to enable a technically simple connection of a roof, in particular a foil roof. Accordingly, the mounting wall, in general form, forms at least a partial region of its upper edge region, a partial region of a roof connection region, in particular a foil roof connection region.

[0036] In particular in connection with an embodiment in which the service housing is open in the direction of the container interior, the platform plate can have an edge-side recess on the rear platform plate edge region facing away from the container side wall, preferably on the second base side, which forms a platform plate-side service opening and is part of the service space.

[0037] The platform plate itself is preferably made of metal, but can also be made of any other suitable material that can withstand the harsh conditions of a fermenter vessel, for example, a glass-fiber-reinforced plastic material. Furthermore, the platform plate is preferably essentially flat, making it easy to walk on when installed.

[0038] Furthermore, it is preferably provided that the platform plate is supported on its underside, relative to the vertical axis, by a frame that extends at least partially around the perimeter, preferably by a frame that extends at least partially around the edges. This allows for an overall stable structure.

[0039] Particularly in conjunction with a service housing that is open to the rear, toward the vessel interior, it can also be provided that the frame projects beyond the rear platform plate edge area, preferably the second base side, toward the vessel interior with a frame section, so that the edge-side recess of the platform plate or the platform plate-side service opening, together with the free space between the rear platform plate edge area and the frame section, essentially form a common service opening and are also part of the service space. This results in a relatively large service opening overall, despite the compact design of a service housing, through which diving equipment can be moved into the service space.

[0040] The frame is preferably part of a support structure, which can also be used to mount and / or support the platform plate on the tank side wall and the tank bottom wall. This provides a particularly reliable mounting of the platform plate and thus the service equipment on the fermenter tank.

[0041] As already indicated above, the service housing, which is preferably arranged approximately centrally on the mounting wall, can be adjoined on both sides by mounting wall sections of the mounting wall. Preferably, at least one mounting wall section, preferably both mounting wall sections, has at least one viewing window designed like a porthole. This allows for an advantageous view into the container interior, particularly since these mounting wall sections of the mounting wall are set back relative to the service housing, toward the container interior.

[0042] According to another particularly preferred specific embodiment, the service device comprises at least one injection device, in particular for wetting a substrate surface or a floating layer of a substrate accommodated in the container interior. This wetting of the floating layers ensures that these floating layers participate in the fermentation process even without being stirred into the substrate, in particular when the added medium is sucked in or removed from the substrate of the fermenter container itself or, alternatively or additionally, from another fermenter container of an associated biogas plant. Due to the jagged surface structure of the floating layer, the bacteria in the liquid jet find a sufficient attack surface for an effective fermentation process with a high biogas yield.

[0043] Specifically, the at least one injection device can comprise a pipeline that extends from the service device, preferably from the platform plate, into the container interior. The pipeline, preferably at the free end of the pipeline, has an injection element, preferably an injection nozzle. To ensure that the substrate surface or a floating layer can be sprayed or squirted reliably with the injection device, it is preferably provided that the injection element is positioned higher than the platform plate, relative to the vertical axis.

[0044] Specifically, the pipeline can be guided with a pipeline section coming from outside the fermenter tank into the tank interior, preferably into the area behind the service device and / or behind the platform plate, most preferably behind the assembly wall, where the pipeline is then guided with a further pipeline section, relative to the vertical axis direction, in order to arrange the preferably horizontally aligned injection element, preferably an injection nozzle, relative to the vertical axis direction in the area above the platform plate.

[0045] In principle, the pipeline can be routed from outside the fermenter tank through the mounting wall into the tank interior. This can be advantageous, for example, if the intention is to avoid bends and thus pressure losses in the pipeline, which is preferably designed as a pressure line. Alternatively, however, a design can also be provided in which the pipeline, with the pipeline section coming from outside the fermenter tank, is routed through the platform plate into the tank interior and from there, with at least one essentially horizontally running inner pipeline section, is routed even further and deeper into the tank interior and in the area behind the service device and / or behind the platform plate, preferably behind the mounting wall, where the pipeline is then routed upwards with the further pipeline section relative to the vertical axis direction.For example, routing the pipe through the platform plate has the advantage that a siphon function can be easily created by bending the pipe in the area outside the platform plate. Furthermore, the space on the mounting wall is kept free, allowing additional functional units to be installed there or creating space for a convenient view into the tank's interior through a porthole, if installed there.

[0046] The pipeline itself can, of course, be designed in different ways, for example, with curved and straight sections. Furthermore, according to an advantageous embodiment, an adjustment device is provided by means of which the injection element can be pivoted within predetermined angular ranges, preferably in the vertical axis direction and / or in the transverse direction. This makes it possible to wet the substrate surface or the floating layer surface over a wide area.

[0047] Any desired, preferably liquid, substance can be injected into the container interior via the injection device, which causes the floating layers to be included in the fermentation, for example substrate from another fermenter container of a biogas plant or from another source, which is, for example, kept in the region of the fermenter container. However, a particularly preferred embodiment provides that the at least one injection device has a conveying device, in particular a pump, by means of which substrate can be withdrawn from a region of the substrate accommodated in the container interior that lies below the substrate surface or the floating layer and can be conveyed via the pipeline to the injection element.

[0048] Depending on the requirements and conditions, for example the diameter of a fermenter tank, one, possibly two or more service devices can be provided on a fermenter tank, for example each with a platform plate and a service housing.

[0049] Furthermore, a method for operating a biogas plant fermenter tank is claimed. The resulting advantages are identical to those of the biogas plant fermenter tank, so reference is made to the previous explanations to avoid repetition.

[0050] Using a drawing, examples of biogas plant fermenter tanks according to the invention, including exemplary service facilities, are explained. They show:

[0051] Figure 1 is a schematic plan view obliquely from above of a biogas plant fermenter tank in the area of ​​a service facility according to a first embodiment,

[0052] Figure 2 shows a section along the line AA of Figure 1, Figure 3 shows a section along the line BB of Figure 2 through a service housing,

[0053] Figure 4 shows a longitudinal section through a service housing with a diving equipment guide mast designed as an H-profile mast,

[0054] Figure 5 is a representation corresponding to Figure 4 with the service housing open and the diving device guide mast rotated by 90°,

[0055] Figure 6 shows three exemplary cross-sections of a diving equipment guide mast with two slide guide profiles,

[0056] Figure 7 is a top view obliquely from the front onto a service housing with removable / foldable side panels,

[0057] Figure 8 is a schematic plan view obliquely from above of a biogas plant fermenter tank in the area of ​​a service facility according to a second embodiment,

[0058] Figure 9 is a schematic rear view of the representation of Figure 8,

[0059] Figure 10 is an enlarged detail of the rear view according to Figure 9,

[0060] Figure 10a shows a schematic plan view of the service facility with the inclined wall open,

[0061] Figure 11 is an enlarged detail of the plan view according to Figure 8,

[0062] Figure 12 is an enlarged schematic representation of a carriage in

[0063] Tauchmotor mixer that can be swiveled up and down in the vertical axis direction.

[0064] Figure 1 shows, by way of example and schematically, an oblique view from above of a fermenter tank 1 of a biogas plant in the area of ​​a service facility 2, and Figure 2 shows a corresponding section along line AA from Figure 1. The fermenter tank 1 has a tank interior 3 formed by a bottom wall 4, a circumferential tank side wall 5, and a roof connected gas-tight thereto, which is designed here, for example, as a film roof 6. During plant operation, a substantially liquid, fermentable substrate 7 is filled up to the height of the tank side wall 5.

[0065] The service device 2 has a service platform, which is designed here as an example as a walkable, flat platform plate 8, which is connected to the container side wall 5 in a gas-tight manner.

[0066] The platform plate 8 is further embodied here, by way of example, as a metal plate, preferably made of stainless steel, with a first base side 9 on the container side wall 5 and a second base side 10 opposite the first base side 9, which are connected by platform plate sides 11, 12. A mounting wall 13 projecting essentially vertically upwards is arranged on the platform plate 8, which here extends over the second base side 10 and further slopes downwards on the two platform plate sides 11, 12 towards the first base side 9. The film roof 6 can be connected to the upper edge regions of the mounting wall 13 and to the sloping leg sides.

[0067] Shown schematically here is an injection element 14 of an injection device which projects through the mounting wall 13 into the container interior 3 and through which liquid substrate pumped up from below from the container interior 3 is sprayed onto a floating layer on the substrate surface.

[0068] A rectangular service opening 15a is provided in the platform plate 8, which extends with one side, preferably a long side, from the mounting wall 13 toward the first base side 9 and is covered at the edges by a service housing 16 forming a service space 15. The service opening 15a thus forms part of the service space 15. The service housing 16 and the diving device guide mast 17 accommodated therein and designed as an H-profile mast are shown in more detail in Figures 3 to 7.Figure 2 also shows a central and vertical middle support 18 which, starting from the bottom wall 4, projects with an upper head part 19 above the maximum substrate level 20, wherein a plurality of support belts 21 are stretched from the head part 19 above the substrate level to the side wall areas, onto which a gas storage foil of a gas storage device is placed when the gas storage device is not filled with gas or only slightly, without immersing in the substrate 7. Figure 3 shows a section along the line BB in Figure 2 from top to bottom through the service space 15. This shows a cross-section through the diving equipment guide mast 17 with its H-profile, wherein the two opposite longitudinal plates are each slide guide profiles 22, 23, on which slides 24, 25 (shown schematically) are each mounted.

[0069] 25, which engages behind the slide guide profiles 22, 23 and is height-adjustable. Two submersible mixers 26, 27 are connected to the slides 24, 25, either integrally or detachably.

[0070] The H-profile mast protrudes as the diving device guide mast 17 for the submersible mixers 26, 27 from below through the service opening 15a into the service chamber 15 and thus into the service housing 16 and is pivotably held (pivot arrow 31) on a comparatively short upper wall area 28 of the service housing 16 in a gas-tight pivot bearing 29 and in an associated pivot bearing 30 on the bottom wall 4, as is particularly evident in Figure 4. A hand crank 32 is provided here as a manageable pivoting device, in principle and by way of example only. In practice, the pivot adjustment is preferably carried out in a controlled motorized manner. Furthermore, a fixing device (not shown here) is preferably provided, by means of which the diving device guide mast 17 can be releasably fixed in an assumed pivoted position.

[0071] The upper wall region 28 forms a component of the mounting wall 13 and protrudes from the mounting wall 13, wherein the upper wall region 28 is firmly connected to an upper region of the mounting wall 13, relative to the vertical axis direction, which in this region forms a fixed rear wall 13a of the service housing 16 in the embodiment shown here.

[0072] The height adjustment device for the two submersible mixers 26, 27 for their independent height adjustment has, as an example, per submersible mixer

[0073] 26, 27 each have a controlled rotationally driven cable pulley 33, 34, which is each connected by a pull rope 35, 36 to the associated submersible mixer 26 or 27, as can be seen in particular from Figures 4 and 5.

[0074] From Figures 4, 5, and 7, it can also be seen that the essentially horizontally oriented upper wall region 28, which is firmly connected to the fixed rear wall 13a as a component of the mounting wall 13 of the service housing 16, is shorter than the underlying region of the rectangular service opening 15a. The housing front wall region opposite the fixed rear wall 13a therefore extends here as an inclined wall 37 from the front edge of the housing upper wall 28 diagonally downwards (relative to the vertical axis direction) and forwards (away from the mounting wall 13) to the edge region of the service opening 15a, where it is detachably and removably connected, for example, to the platform plate 8 (arrow 38) in Figure 7.

[0075] If one or both submersible mixers 26, 27 are pulled out of the container interior upwards into the service housing 16, safe and convenient maintenance work is possible by simply removing the inclined wall 37.

[0076] The removal of the inclined wall 37 and its gas-tight reattachment can be easily accomplished, for example, using commercially available (schematically shown) quick-release fasteners 39. Depending on the circumstances, the otherwise stable, fixed side walls can also be folded down onto the platform plate (arrow 43) using hinges 42 (schematically shown) or hinges 44 toward the mounting wall 13 (arrow 45).

[0077] The possibility of independent height adjustment of the two submersible mixers 26, 27 on the submersible mixer guide mast 17, which is designed as an H-profile mast, into a maintenance position in the service housing 16 results in advantageous variation options that can contribute to an optimized downsizing of the service facility:

[0078] With the size of the service opening 15a or the service chamber 15 shown in Figure 3, for example, both submersible mixers 26, 27 can be pulled up into a maintenance position in the service housing 16 while lying side by side, as can also be seen in Figure 4, if the rotation axes of the impeller blades of the submersible mixers 26, 27 are aligned longitudinally. However, if the submersible mixer 26, as shown in Figure 4, still remains at a height below the platform plate 8, the service chamber 15 could be shortened in length, for example, to the dashed line 46 shown in Figure 3, and then the submersible mixer 27 lowered again, the submersible mixer guide mast 17 rotated by 180°, and the submersible mixer 26 pulled up into a maintenance position. Similar positions of the submersible mixers 26, 27 are shown in Figure 5.There, too, in the illustrated rotational position of the submersible device guide mast 17, the submersible mixer 26 would collide with the platform plate 8 or the mounting wall 13, although the submersible mixer 27 is exposed for maintenance in the service housing 16. After maintenance, the submersible mixer 27 can be lowered below the platform plate 8, the submersible device guide mast 17 rotated by 180°, and the submersible mixer 26 pulled upward into a maintenance position. Above and in the figures, a submersible device guide mast 17 is used in the preferred embodiment as an H-profile mast in the manner of a double-T steel girder. In addition, Figure 6 shows both a cross-section with the preferred H-profile 47 (left) and other profile designs, namely a double dovetail profile 48 (centre) or a double tube profile 49 (right), which can be used with similar advantages if necessary.

[0079] Figures 8 to 11 now show an exemplary second embodiment of a biogas plant fermenter tank 1, which will be described below only insofar as it differs from the first embodiment shown in Figures 1 to 7, wherein like parts are provided with like reference numerals.

[0080] The difference from the first embodiment lies in particular in the design of the service device 2, which also has a platform plate 8, the mounting wall 13 of which, however, has a mounting wall recess 13b in the area of ​​the service space 15, as can be seen in particular from Figure 10, so that the service housing 16 here, in this embodiment, is open towards the container interior 3.

[0081] Furthermore, the service opening 15a is not formed by a hole-like opening in the platform plate 8, but rather by an edge-side recess on the second base side 10 of the platform plate 8. As a result, the service housing 16 only partially encloses the service opening 15a formed by the recess and is open toward the container interior 3. This is particularly clearly evident from the schematic diagram in Figure 10a, in which the inclined wall 37 is also open, which also clearly shows how well and easily the submersible mixers moved into the service space 15 are accessible from the outside for maintenance and repair purposes.

[0082] In the schematic diagrams of Figures 10a, the case is shown only as an example in which two submersible motor mixers 26a, 26b are arranged one above the other on the slide guide profile 22, while only one submersible motor mixer 27 is arranged on the other slide guide profile 23.

[0083] Here, too, the mounting wall 13 again has an upper wall region 28, which in this case, however, extends rearwardly away from the service housing 16. This upper wall region 28 is also essentially horizontally oriented and serves as a bearing point for the diving device guide mast 17 by means of a pivot bearing 29 already described in detail in connection with the embodiment.

[0084] In the embodiment shown here, each cable pulley 33, 34 is also assigned a cable pulley drive 33a, 34a, wherein the cable pulley drives 33a, 34a are arranged outside the fermenter container 1 on the pivot bearing 29 of the diving device guide master 17 and are drivingly connected to the respectively assigned cable pulley 33, 34 arranged in the container interior, here within the service housing 16.

[0085] Also unlike the first embodiment of Figures 1 to 7, the upper wall area 28 here extends essentially over the entire length of the mounting wall 13 and thus of the second base side 10, so that the upper wall area 28 offers space for the connection of additional functional units, here, for example, space for a gas exhaust connection 51 and for an emergency gas discharge connection 52. Both the bearing point for the diving equipment guide mast 17 and the connection points for the additional functional units are easily accessible to a worker on the upper wall area 28.

[0086] In addition, the mounting wall 13 here has a wall section 53 which projects upwards in the vertical axis direction from the horizontally oriented upper wall section 28 and which, in the embodiment shown here, forms a partial section of the roof connection section.

[0087] As can be further seen from the combined view of Figures 8 to 10, the platform plate 8 here has, on its underside, relative to the vertical axis direction, a frame which runs at least partially around the edge and which supports the platform plate 8 from below. The frame 54 projects beyond the second base side 10 forming the service opening 15a in the direction of the container interior 3 with a frame section 55, so that the platform plate-side service opening 15a, together with the free space 56 between the rear platform plate edge region and the frame section 55, essentially form a common service opening.

[0088] For this purpose, the frame 54 is also part of a support frame 57, by means of which the platform plate 8 is held and supported on the container side wall 5. Alternatively or additionally, support on the container bottom wall 5 would also be conceivable. As can be seen from Figures 8 to 11, in this embodiment, the service housing 16, which is arranged approximately centrally on the mounting wall 13, is adjoined on both sides by a mounting wall section 13c, 13d, which is set back relative to the inclined wall 37 towards the rear in the direction of the container interior 3 and on which viewing windows 50, for example designed in the manner of a porthole, can be arranged. As can be seen from Figure 11 merely as an example, such viewing windows 50 can also be arranged in the top wall region 28 and in the wall section 53, if necessary.

[0089] In this second embodiment, too, an injection device with an injection element 14 is provided, wherein the injection device here has a pipeline 58 which, with a pipeline section 58c coming from outside the fermenter tank 1, leads through the platform plate 8 into the tank interior 3 and from there, with an essentially horizontally running inner pipeline section 58b, which is curved here only by way of example and essentially guided outside around the area of ​​the platform plate 8, further and deeper into the tank interior 3 and essentially centrally or centrally behind the mounting wall 13, where the pipeline 58 is then guided upwards in the vertical axis direction with a further pipeline section 58c in order to arrange the horizontally oriented injection element 14, formed by an injection nozzle, in the area above the platform plate 8.Alternatively, the inner pipe section 58b could also be guided in a straight line to the rear, as shown only very schematically in Figure 10a, in which case the injection element 14 would then be arranged more laterally in order to avoid collisions between the submersible mixers and the inner pipe section 58b.

[0090] Here, too, an adjustment device 59 can be provided, by means of which the injection element can be pivoted within predetermined angular ranges, for example, within an angular range of 120°. Pivoting in the horizontal or transverse direction is particularly advantageous, but in principle also possible in the vertical axis direction. The adjustment device 59 is shown here only very schematically and in principle.

[0091] Otherwise, the structure, particularly with regard to the submersible device guide mast 17, is identical to that of the first embodiment, so that to avoid repetition, reference is made to the statements made there. As can also be seen from the schematic principle diagram in Figure 12, the submersible mixer 26, 27 can be pivotably arranged on the respectively associated carriage 24, 25, so that the submersible mixers 26, 27 can be pivoted upwards and / or downwards as needed, viewed in the vertical axis direction. For this purpose, it is then preferably provided that a pivot bearing is formed between the submersible mixer 26, 27 and the associated carriage 24, 25, which pivot bearing is also designed such that the submersible mixer 26, 27 is fixed in a pivot position once it has been set. The pivot device can be controlled externally, for example.

[0092] List of reference symbols

[0093] 1 fermenter tank 28 upper wall area

[0094] 2 Service facility 29 Swivel bearing

[0095] 3 Container interior 30 Swivel bearing

[0096] 4 Tank bottom wall 31 Swivel arrow

[0097] 5 Container side wall 32 Hand crank

[0098] 6 foil roof 33 pulley

[0099] 7 Substrate 33a Pulley drive

[0100] 8 Platform plate 34 Pulley

[0101] 9 first base side 34a pulley drive

[0102] 10 second base side 35 pull rope

[0103] 11 Platform plate side 36 Pull rope

[0104] 12 Platform plate side 37 Inclined wall

[0105] 13 Mounting wall 38 Arrow

[0106] 13a fixed rear wall 39 quick release

[0107] 13b Mounting wall recess 40 side wall

[0108] 13c Mounting wall section 41 side wall

[0109] 13d Mounting wall section 42 hinge

[0110] 14 Injection element 43 Arrow

[0111] 15 Service room 44 Hinge

[0112] 15a Service opening 45 arrow

[0113] 16 service housing 46 line

[0114] 17 Diving equipment guide mast 47 H-profile

[0115] 18 Center support 48 Double dovetail profile

[0116] 19 Headboard 49 Double tube profile

[0117] 20 substrate level 50 viewing window

[0118] 21 Support straps 51 Connection

[0119] 22 Slide guide profile 52 Connection

[0120] 23 Slide guide profile 53 Wall section

[0121] 24 carriages 54 frames

[0122] 25 carriage 55 frame section

[0123] 26 Submersible mixer 56 Free space

[0124] 27 Submersible mixer 57 Support frame 58 Pipeline

[0125] 58a Pipeline section

[0126] 58b Pipeline section

[0127] 58c Pipe section 59 Adjustment device

Claims

Patent claims 1. Biogas plant fermenter tank, with a tank interior (3) in which a substantially liquid, fermentable substrate (7) can be accommodated, with at least one vertical diving device guide mast (17) which is at least partially accommodated in the tank interior (3) and aligned in the vertical axis direction, characterized in that the diving device guide mast (17) is designed to guide and hold a plurality of diving devices which are height-adjustable thereon in the longitudinal direction of the guide mast by means of a height adjustment device and has at least two, preferably exactly two, spaced-apart and extending in the longitudinal direction of the guide mast slide guide profiles (22, 23), on each of which at least one diving device (26, 27) can be arranged in a height-adjustable manner by means of a slide (24, 25), wherein diving devices (26,27) can be moved and / or adjusted in height independently of each other by means of the height adjustment device.

2. Fermenter tank according to claim 1, characterized in that the slide guide profiles are connected to one another at least in regions by means of at least one connecting element, as seen in the longitudinal direction of the guide mast.

3. Fermenter tank according to claim 2, characterized in that the slide guide profiles, viewed in the longitudinal direction of the guide mast, are connected to one another by means of at least one continuous web as a connecting element, or that the slide guide profiles, viewed in the longitudinal direction of the guide mast, are connected to one another by means of several bars or webs as connecting elements.

4. Fermenter tank according to one of the preceding claims, characterized in that the diving device guide mast (17) has at least in some areas, preferably at least in the adjustment range of the diving devices (26, 27), an H-profile in the manner of a double-T profile, the upper chord and lower chord of which, which are connected by means of at least one connecting element, preferably by means of at least one web, form the slide guide profiles (22, 23).

5. Fermenter container according to one of the preceding claims, characterized in that at least one, preferably exactly one, immersion device (26, 27) is provided per slide guide profile (22, 23), each of which is formed by a submersible agitator with a rotationally driven agitator blade, wherein it is preferably provided that the agitator blades of the immersion devices (26, 27) designed as submersible motor agitators are aligned in the assembled state such that the axes of rotation of the agitator blades point in the same direction.

6. Fermenter container according to one of the preceding claims, characterized in that a diving device (26, 27) with associated slide (24, 25) forms a structural unit or is designed in several parts, in particular in two parts.

7. Biogas plant fermenter tank according to one of the preceding claims, characterized in that the immersion device (26, 27) is arranged on the associated carriage (24, 25) so as to be pivotable upwards and / or downwards, viewed in the vertical axis direction.

8. Biogas plant fermenter tank according to one of the preceding claims, characterized in that a tank opening of the upwardly open fermenter tank (1) is covered by a roof (6), that a service device (2) forming part of the roof (6) and / or arranged in the region of the roof (6) is provided, which has a walkable platform plate (8) as a service platform, that the diving device can be displaced into the region of the roof-side service device (2) by means of the height adjustment device.

9. Biogas plant fermenter tank according to claim 8, characterized in that that the container interior (3) of the fermenter container (1) is formed by a bottom wall (4) and a circumferential side wall (5), that the service device (2) is connected on the one hand to the side wall (5), preferably in a gas-tight manner, and on the other hand has a roof connection area to which the roof (6) is connected, preferably in a gas-tight manner.

10. Biogas plant fermenter tank according to claim 8 or 9, characterized in that the service device (2), preferably the platform plate (8), has or forms a service space (15), preferably a service opening, which can be closed with a preferably openable cover device (16), that the at least one diving device (26, 27) arranged in a height-adjustable manner on the diving device guide mast can be displaced by means of the height adjustment device into the area of ​​the service space (15) and / or can be arranged in the area of ​​the service space (15) in a way that is accessible from outside the service space (15), wherein it is preferably provided that the service space (15) is suitable and designed such that the at least one diving device (26, 27) arranged in a height-adjustable manner on the diving device guide mast (17) can be moved through the service space (15) out of the fermenter tank (1) and back into the fermenter tank (1).

11. Fermenter tank according to one of the preceding claims, characterized in that the diving device guide mast (17) can be pivoted about its longitudinal axis by means of a pivoting device (29, 30), in particular pivoted in such a way that diving devices (26, 27) arranged on different slide guide profiles (22, 23) can be displaced, viewed in the vertical axis direction, into the area of ​​the service space (15).

12. Biogas plant fermenter tank according to claim 10 and 11, characterized in that the diving device guide mast (17), seen in the vertical axis direction, projects from below into the service space (15) and is pivotally mounted with an upper guide mast area on the service device (2) with respect to the vertical axis direction, preferably by means of a pivot bearing (29, 30).

13. Fermenter container according to one of the preceding claims, characterized in that the height adjustment device has a rotationally drivable cable pulley (33, 34) with a traction cable (35, 36) for each immersion device (26, 27) which is connected to the associated carriage (24, 25) and / or to the immersion device (26, 27).

14. Fermenter tank according to claim 13, characterized in that the cable pulleys (33, 34) are arranged on the diving device guide mast (17) at an upper guide mast area, relative to the vertical axis direction, preferably in such a way that the cable pulleys (33, 34) are arranged in the tank interior (3), preferably within the service housing (16).

15. Fermenter tank according to claim 13 or 14, characterized in that each cable pulley (33, 34) is assigned a cable pulley drive (33a, 34a), wherein it is preferably provided that the cable pulley drives (33a, 34a) are arranged outside the fermenter tank (1), preferably on a pivot bearing (29) of the diving device guide mast (17), and are drivingly connected to the respectively assigned cable pulley (33, 34) arranged in the tank interior (3), preferably within the service housing (16).

16. Biogas plant fermenter tank according to one of the preceding claims, characterized in that the diving device guide mast (17) is mounted with a lower guide mast area, relative to the vertical axis direction, on the bottom side, preferably in the region of a bottom wall (4) of the tank interior (3).

17. Biogas plant fermenter tank according to one of claims 10 to 16, characterized in that the covering device is formed by a service housing (16) arranged above the platform plate (8) and preferably projecting upwards from the platform plate (8) in the vertical axis direction.

18. Fermenter tank according to one of claims 13 to 17, characterized in that the platform plate (8) has a mounting wall (13) which projects upwards in the vertical axis direction from the platform plate (8) in the region of the service space (15), preferably with at least one mounting wall section projecting substantially vertically upwards in the vertical axis direction, and that the service housing (16) forms an integral part of the mounting wall (13) and / or is directly connected to the mounting wall (13), preferably towards the front in the direction of the container side wall (5).

19. Fermenter tank according to claim 18, characterized in that the mounting wall (13) projects upwards in the vertical axis direction from a rear platform plate edge region facing away from the tank side wall (5), preferably with at least one mounting wall section projects substantially vertically upwards in the vertical axis direction.

20. Fermenter tank according to claim 18 or 19, characterized in that the mounting wall (13) in the area of ​​the service space (15), preferably in the area above a service opening (15a) formed by an edge-side platform plate recess, has a mounting wall recess (13b), so that the service housing (16) is open towards the tank interior (3), preferably in such a way that the service housing (16) only partially encloses a service opening (15a) formed by an edge-side platform plate recess and is open towards the tank interior (3).

21. Fermenter tank according to claim 18 or 19, characterized in that the mounting wall (13) runs continuously in the area of ​​the service space (15) and forms a fixed rear wall (13a) or a fixed rear wall area of ​​the service housing (16), preferably in such a way that the service housing (16) completely encloses a service opening (15a) formed in the platform plate (8) at the edge and / or adjoins a service opening (15a) formed in the platform plate (8) in a tube-like manner upwards in the vertical axis direction.

22. Fermenter tank according to one of claims 18 to 21, characterized in that the service housing (16) has at least one service housing wall which adjoins the mounting wall (13) to form the service housing (16), preferably adjoins the mounting wall (13) towards the front in the direction of the tank side wall (5).

23. Fermenter container according to claim 22, characterized in that the at least one service housing wall has two housing side wall areas (40, 41) which are spaced apart from each other on the mounting wall (13) connect, preferably in such a way that the housing side wall regions (40, 41) extend in the direction away from the mounting wall (13), that the at least one service housing wall further has a housing front wall region (37) which connects the two housing side wall regions (40, 41) to one another on the side facing away from the mounting wall.

24. Fermenter tank according to claim 23, characterized in that the two housing side wall regions (40, 41) and the housing front wall region (37) follow the course of a platform plate-side service opening (15a) facing them and / or directly adjoin a platform plate-side service opening (15a) facing them.

25. Fermenter container according to claim 23 or 24, characterized in that at least a part of the housing front wall area, preferably substantially the entire housing wall front area, is designed as a detachable and / or removable inclined wall (37) which is inclined backwards in the direction of the vertical axis in the direction of the mounting wall (13).

26. Fermenter tank according to claim 25, characterized in that the detachable and / or removable inclined wall (37), based on the vertical axis direction, starting from an upper region close to the mounting wall, preferably starting from an upper region of the mounting wall (13), slopes downwards, in the direction of the platform plate (8), and forwards, in the direction away from the mounting wall (13), preferably in such a way that the inclined wall (37), starting from an upper region close to the mounting wall, preferably starting from an upper region of the mounting wall (13), extends diagonally downwards to the platform plate (8), in particular to a front edge region of a platform plate-side service opening (15a) facing away from the mounting wall (13).

27. Fermenter tank according to one of claims 18 to 26, characterized in that the mounting wall (13), with respect to the vertical axis direction, has an upper wall region (28) which is oriented substantially horizontally and / or on which the diving device guide mast (17) is pivotably mounted, preferably pivotably mounted by means of a pivot bearing (29, 30).

28. Fermenter tank according to claim 27, characterized in that the upper wall region (28) extends substantially over the entire length of the mounting wall (13) and has at least one connection (51, 52) for a functional unit, in particular for a gas vent and / or an emergency gas vent as a functional unit.

29. Fermenter tank according to claim 28, characterized in that the mounting wall (13) has a wall section (53) projecting upwards in the vertical axis direction from the horizontally oriented upper wall section (28), wherein it is preferably provided that the upwardly extending wall section (53) forms at least a partial section of a roof connection section.

30. Fermenter tank according to one of claims 18 to 29, characterized in that the platform plate (8) has a first base side (9), preferably as a longer base side, which faces the container side wall (5), preferably adjoins the container side wall (5), that a second base side (10) of the platform plate (8), preferably as a shorter base side, is opposite the first base side (9), 31. Fermenter tank according to claim 30, characterized in that the mounting wall (13) extends at least over the second base side (10), preferably over the second base side (10) and further at least partially along the platform plate sides (11, 12) in the direction of the first base side (9), in particular in such a way that the mounting wall (13) slopes down from the second base side (10) towards the first base side (9), in particular slopes down obliquely, and that the mounting wall (13) forms at least with a partial region of its upper edge region a partial region of a roof connection region, preferably a film roof connection region.

32. Fermenter container according to one of claims 8 to 31, characterized in that the platform plate (8) has, on the rear platform plate edge region facing away from the container side wall (5), preferably on the second base side (10), an edge-side recess which forms a platform plate-side service opening (15a).

33. Fermenter tank according to one of claims 8 to 32, characterized in that the platform plate (8) is supported on its underside, relative to the vertical axis direction, with a frame (54) which runs around at least some areas, preferably with a frame (54) which runs around at least some areas on the edge.

34. Fermenter tank according to claim 32 and 33, characterized in that the frame (54) projects beyond the rear platform plate edge region, preferably the second base side (10), in the direction of the container interior (3) with a frame section (55) in such a way that the platform plate-side service opening (15a) together with the free space (56) between the rear platform plate edge region and the frame section (55) form a common service opening.

35. Fermenter tank according to claim 33 and 34, characterized in that the frame (54) is part of a support frame (57) by means of which the platform plate (8) is also held and / or supported on the tank side wall (5) and / or on the tank bottom wall (5).

36. Fermenter container according to one of claims 18 to 35, characterized in that the service housing (16), which is preferably arranged approximately centrally on the mounting wall (13), is adjoined on both sides by mounting wall sections (13c, 13d) of the mounting wall (13), wherein it is preferably provided that in at least one mounting wall section (13c, 13d), preferably in both Mounting wall sections (13c, 13d), at least one viewing window (50) designed in the manner of a porthole is formed.

37. Fermenter tank according to one of claims 8 to 36, characterized in that the service device (2) has at least one injection device, in particular for wetting a substrate surface or a floating layer of a substrate (7) accommodated in the tank interior (3).

38. Fermenter container according to claim 37, characterized in that the at least one injection device has a pipeline (58) which is guided from the service device (2), preferably from the platform plate (8), into the container interior (3), wherein the pipeline (58), preferably at the free pipeline end, has an injection element (14), preferably an injection nozzle, wherein preferably it is provided that the injection element (14) is higher than the platform plate (8) with respect to the vertical axis direction.

39. Fermenter tank according to claim 38, characterized in that the pipeline (58) is guided with a pipeline section (58a) coming from outside the fermenter tank (1) into the tank interior (3), preferably into the area behind the service device (2) and / or behind the platform plate (8), most preferably behind the mounting wall (13), where the pipeline (58) is then guided upwards with a further pipeline section (58c) relative to the vertical axis direction in order to arrange the preferably horizontally oriented injection element (14), preferably an injection nozzle, relative to the vertical axis direction in the area above the platform plate (8).

40. Fermenter tank according to claim 39, characterized in that the pipeline (58) with the pipeline section (58a) coming from outside the fermenter tank (1) is guided through the platform plate (8) into the tank interior (3) and from there with at least one essentially horizontally running inner pipeline section (58b) even further and deeper into the tank interior (3) and into the area behind the service device (2) and / or behind the platform plate (8), preferably behind the assembly wall (13), where the pipeline (58) is then guided upwards with the further pipeline section (58c) in relation to the vertical axis direction.

41. Fermenter container according to one of claims 38 to 40, characterized in that an adjusting device (59) is provided, by means of which the injection element (14) can be pivoted within predetermined angular ranges, preferably in the vertical axis direction and / or in the transverse direction.

42. Fermenter tank according to one of claims 38 to 41, characterized in that the at least one injection device has a conveying device, in particular a pump, by means of which substrate can be withdrawn from a region of the substrate (7) accommodated in the tank interior (3) located below the substrate surface or the floating layer and can be conveyed via the pipeline (58) to the injection element (14).

43. Fermenter tank according to one of claims 8 to 42, characterized in that several service devices (2) are arranged on the fermenter tank (1).

44. Method for operating a biogas plant fermenter tank (1), in particular a biogas plant fermenter tank (1) according to one of the preceding claims, with a tank interior (3) in which a substantially liquid, fermentable substrate (7) can be accommodated, with at least one vertical diving device guide mast (17) which is at least partially accommodated in the tank interior (3) and aligned in the vertical axis direction, characterized in that the diving device guide mast (17) is designed to guide and hold diving devices which are height-adjustable thereon in the guide mast longitudinal direction by means of a height adjustment device and has at least two, preferably exactly two, spaced-apart and extending in the guide mast longitudinal direction, on each of which at least one diving device (26, 27) can be arranged in a height-adjustable manner by means of a carriage (24, 25), wherein on different carriage guide profiles (22,23) arranged diving devices (26, 27) can be displaced and / or adjusted in height independently of one another by means of the height adjustment device.

Images