• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    Installation and procedure for anaerobic digestion of biodegradable organic waste, the installation comprising a digester in the form of a closed cylindrical tank (10); supply means (20) for materials to be treated, with loading holes (22) distributed in a first portion of the tank wall (10); homogenization means (30) with injection nozzles distributed at the bottom (12) of the tank (10); discharge means (40) in a second portion of the tank wall (10) diametrically opposite to the first portion, intended for the extraction of digested materials; elimination means (50) in a third portion diametrically opposite to the first portion and in the lower part of the tank (10), intended exclusively for the extraction of sedimentable matters; and a recirculation circuit (60) between the discharge means (40) and the supply means (20). (Machine-translation by Google Translate, not legally binding)
    公开号:ES2792776A1
    申请号:ES202030639
    申请日:2020-06-25
    公开日:2020-11-11
    发明作者:Marc Vinot；Alonso Carlos Abilio Perez；Salamanca Pilar Tur；Tardón Alberto Reneo；Giménez Eduardo Fernández
    申请人:Urbaser SA；
    IPC主号:
    专利说明:

    [0002] Anaerobic digestion setup and procedure
    [0004] TECHNICAL SECTOR
    [0006] The present invention relates generally to the waste treatment sector, and more specifically to digesters for anaerobic degradation of biodegradable organic materials to obtain biogas.
    [0008] BACKGROUND OF THE INVENTION
    [0010] The use of digesters to obtain biogas and other by-products such as organic fertilizer is known in the art.
    [0012] There are digesters in which the anaerobic degradation of waste containing solid organic matter with a high concentration of dry matter occurs. In particular, installations are known with a digester in the form of a closed cylindrical tank that does not have internal partitions or internal mechanical equipment. The digester is provided with feed holes for the materials to be treated and discharge holes for the digested materials, distributed at different heights on the tank wall, as well as vertical homogenization means in the form of gaseous fluid injectors in the bottom of the tank. Thanks to the distribution in the tank of the feed holes with respect to the discharge holes, and the use of injectors, which guarantee the homogeneity of the material by vertical sectors in the tank, a substantially horizontal unidirectional circulation of the material between supply ports and discharge ports.
    [0014] The materials treated in the digester may contain undesirable, especially heavy and non-organic particles, which are liable to settle in the digester, for example pebbles, glass or metallic compounds. One or more of the discharge holes are located in the lower part of the tank wall, so that sedimentable matter can be drawn through them in the lower part of the tank. Settling materials, which may contain the aforementioned undesirable particles, join the rest of the discharged materials to form a single flow and this is directed towards a device that allows the discharge of the digested materials. Part of the discharged matter is recirculated through a pump to the feed ports,
    [0016] As discussed, materials that are recirculated can also contain undesirable particles. This implies that either they are unnecessarily reintroduced into the tank, or some system has to be additionally implemented that extracts said undesirable particles before being reintroduced into the tank. All this has a negative impact on aspects such as the effectiveness, efficiency and the useful life of the digester.
    [0018] SUMMARY OF THE INVENTION
    [0020] In order to solve the problems mentioned above, according to a first aspect, the present invention provides an installation for anaerobic digestion of waste containing biodegradable organic matter, the installation comprising:
    [0021] - a digester in the form of a closed cylindrical tank, lacking internal partitions and internal mechanical equipment;
    [0022] - means for supplying materials to be treated in the digester, comprising one or more loading conduits that lead to the tank through respective loading holes, the loading holes being distributed at different heights in a first portion of the wall of the tank;
    [0023] - Homogenization means, comprising injectors with respective fluid injection nozzles, the injection nozzles being arranged in respective homogenization holes distributed at the bottom of the tank, and directed towards the interior of the tank, to favor the homogenization and fluidization of subjects;
    [0024] - discharge means for the extraction of digested materials, which comprise one or more discharge conduits that exit the tank through respective discharge holes, the discharge holes being distributed at different heights in a second portion of the tank wall, diametrically opposite to the first portion;
    [0025] - means of elimination intended exclusively for the extraction of sedimentable matter, comprising one or more elimination conduits that exit the tank through respective elimination holes, the elimination holes being in a third portion of the tank wall, diametrically opposite to the first portion and in the lower part of the tank, so that the disposal conduits run completely independently of the discharge conduits without joining them; Y
    [0026] - a recirculation circuit between the discharge means and the supply means.
    [0028] According to a second aspect, the present invention provides a process for the anaerobic digestion of waste containing biodegradable materials by means of the installation of the present invention, in which the materials to be treated are introduced into the tank through the supply means; the homogenization means guarantee the homogenization and fluidization of the materials inside the tank; thanks to a push feeding, the materials circulate inside the tank according to a substantially horizontal component from the supply means towards the discharge means and the elimination means; the sedimentable matters are removed by means of elimination; and by the recirculation circuit a recirculation of digested materials is carried out between the discharge means and the supply means.
    [0030] Thanks to the present invention, the sedimentable materials are extracted exclusively through the elimination holes, and by not mixing with the materials extracted through the discharge holes, the recirculation of undesirable particles that may form part of said sedimentable materials, such as pebbles, is avoided. , glass, metal compounds, etc.
    [0032] This implies several improvements over other facilities of the state of the art. In particular, by not recirculating or reintroducing undesirable particles into the tank, the space occupied by said materials is minimized, thus maximizing the useful volume in the tank for digestion; installation wear is reduced; the flow of materials is improved; It is not necessary to implement any additional system that separates the undesirable particles from the rest of the recirculated matter before their introduction into the tank; Ultimately, the digestion process is carried out in a more efficient way, with lower energy costs and maintenance, and the useful life of the installation is improved.
    [0033] Throughout the description and claims the word "comprise" and its variants are not intended to exclude other technical characteristics, additives, components or steps. Furthermore, the word "comprises" includes the case "consists of". For those skilled in the art, other objects, advantages and characteristics of the invention will emerge partly from the description and partly from the practice of the invention. The following examples are provided by way of illustration, and are not intended to be limiting of the present invention. Furthermore, the present invention covers all possible combinations of particular embodiments indicated herein.
    [0035] BRIEF DESCRIPTION OF THE DRAWINGS
    [0037] The present invention will be better understood with reference to the following figures, where by way of illustration and not limitation, the following has been represented:
    [0038] Figure 1 shows a schematic side view of an installation according to a particular embodiment of the present invention.
    [0039] Figure 2 shows a schematic horizontal section of the tank of the installation of Figure 1.
    [0040] Figure 3 shows another schematic horizontal section of the tank of the installation of figure 1.
    [0041] Figure 4 shows a schematic side view of an installation according to another particular embodiment of the present invention.
    [0043] MODES OF EMBODIMENT OF THE INVENTION
    [0045] According to a first aspect, the present invention provides an installation for the anaerobic digestion of waste containing biodegradable organic matter.
    [0047] As shown in the figures, the installation comprises a digester in the form of a closed cylindrical tank (10), lacking internal partitions and internal mechanical equipment.
    [0049] The wastes to be digested by the present invention contain biodegradable organic matter, but can also contain undesirable particles, especially heavy and non-organic, which are liable to settle in the tank (10), for example pebbles, glass or metallic compounds. By way of In particular, the present invention can advantageously focus on the anaerobic digestion of residues containing solid organic matter, in the form of a paste with a high concentration of dry matter, in any case greater than 15%, and especially between 20% and 32%. ; and therefore, composed of materials with low water content.
    [0051] Since the materials used are materialized in the form of a paste, the terms "materials" and "paste" will therefore be used interchangeably, generically, to designate all these materials that can be treated through the present invention. .
    [0053] As used in the present document, the term "meridian plane" is defined as an imaginary vertical plane that starts from the axis of the tank (10) and extends transversely to the tank, cutting it virtually on one side. Based on the above , two meridian planes extending in different directions, make up a wall portion of the tank 10 comprised between them The meridian planes and the wall portion comprised between them delimit an imaginary wedge-shaped space.
    [0055] The installation comprises supply means (20) which are intended to introduce the materials to be treated in the digester, for their fermentation. The supply means (20) comprise one or more loading conduits that open into the tank (10) through respective loading holes (22), distributed at different heights in a first portion of the tank wall (10).
    [0057] According to a particular embodiment shown in Figure 2, the first portion of the tank wall (10) is comprised between two meridian planes that form an angle α of 180 ° or less with each other.
    [0059] According to one option, the charging holes (22) are located in the upper part of the tank (10). Alternatively, the charging holes (22) are located both in the upper part and in the lower part of the tank (10), to ensure a good mixing of the materials.
    [0060] According to an option shown in Figures 1 and 4, the supply means (20) comprise a system of loading valves (24) whose actuation allows the passage of materials into the tank (10), continuously or sequentially during the hours of operation of the plant.
    [0062] The installation can also comprise a storage tank (26) in which the waste destined to enter the digester is placed and conditioned; and a loading pump (27) to drive the materials into the digester.
    [0064] The installation also comprises discharge means (40) that are intended for the extraction of digested materials from the tank (10), and comprise one or more discharge conduits that exit the tank (10) through respective discharge holes (42). As shown in Figures 1 and 2, the discharge holes (42) are distributed at different heights in a second portion of the tank wall (10), diametrically opposite to the first portion where the loading holes are arranged. (22).
    [0066] According to a particular embodiment shown in Figure 2, the second portion of the tank wall (10) is comprised between two meridian planes that form an angle α of 180 ° or less with each other.
    [0068] As shown in Figures 1 and 4, the installation may comprise a system of discharge valves (44) whose actuation allows the exit of the digested materials to the outside of the tank (10), continuously or sequentially during the hours of operation. of the plant.
    [0070] Due to the fact that the discharge holes (42) are located diametrically opposite to the loading holes (22), an advance of the materials is maintained inside the tank (10) according to a substantially horizontal component, from the holes of charging (22) towards the discharge ports (42) by means of a push feed, obtained for example by using the charging pump (27).
    [0072] The installation also comprises elimination means (50) that are exclusively intended for the extraction of sedimentable materials (including mentioned undesirable particles) that can be deposited in the lower part of the tank (10). The elimination means (50) comprise one or more elimination conduits that exit the tank (10) through separate elimination orifices (52). As shown in Figures 1 and 3, the removal holes (52) are arranged in a third portion of the tank wall (10) diametrically opposite to the first portion where the loading holes (22) are arranged. The third portion is located in the lower part of the tank (10), below the second portion where the discharge holes (42) are arranged.
    [0074] The disposal lines run completely independently of the discharge lines, without joining them. In this way, the sedimentable materials do not pass through the discharge conduits, since they are extracted from the tank (10) exclusively by the elimination means (50).
    [0076] According to a particular embodiment shown in figure 3, the third portion of the tank wall (10) is comprised between two meridian planes that form an angle p of 120 ° or less with each other.
    [0078] As shown in Figures 1 and 4, the installation can comprise a system of disposal valves (54) installed in the disposal ducts, the actuation of which allows sequential or continuous extractions of the sedimentable materials, which are subsequently treated in a cleaning team (56).
    [0080] According to a particular embodiment, the installation comprises a dehydration system (46) in which digested materials are treated, making them go through several dehydration stages to generate process water and dry material. The process water can be reused to condition the waste before entering the digester, mixing with it, for example in the storage tank (26); The process water can also be used to facilitate the discharge of the sedimentable matter after the removal valves (54). The dried material can be used to produce compost or biostabilized material.
    [0082] The installation also comprises a recirculation circuit (60) between the discharge means (40) and the supply means (20). In this way, part or the All of the digested materials, extracted from the tank (10) by the discharge means (40), can be recirculated and introduced into the digester through the supply means (20). The recirculated materials can be used to condition the waste before entering the digester, mixing with them, for example in the storage tank (26).
    [0084] The present invention takes advantage of the geometry of the tank (10) to carry out, on the one hand, the extraction and, on the other, the gravitational recirculation of the fermented materials. The static pressure generated by the height of the fermentation materials in the tank (10) is transmitted directly to the materials inside the recirculation circuit (60), driving them towards the supply means (20). By suitably choosing the diameter of the pipes, an impulse and a flow of recirculated materials is obtained sufficient to reach the supply means (20). However, the installation can be completed with one or more additional pumps, for example to improve flow control, or to ensure adequate boost and flow in situations where static pressure is not sufficient for this, etc.
    [0086] According to a particular embodiment shown in figure 4, the supply means (20) also comprise one or more recirculation holes (28) distributed in the first portion of the tank wall (10). The recirculation holes (28) are intended for the entry of recirculated materials into the tank (10).
    [0088] According to a more particular embodiment, the installation also comprises an auxiliary recirculation circuit (62) between the recirculation circuit (60) and the recirculation holes (28), and optionally an auxiliary recirculation pump (64). The auxiliary circuit (62) is intended for the transit of part or all of the recirculated materials towards the recirculation holes (28). According to this option, the recirculated materials can be introduced into the tank (10) through the loading holes (22) by means of the loading pump (27), or through the recirculation holes (28) by means of the auxiliary pump (64), or through both types of orifices simultaneously by means of their respective pumps.
    [0089] As used herein, the term "supply zone" is defined as the zone of the tank (10) in which the supply means (20) are arranged; and the term "extraction zone" is defined as the zone of the tank (10) in which the discharge means (40) and the disposal means (50) are arranged.
    [0091] The installation also comprises homogenization means (30), which in turn comprise injectors (32) with respective nozzles for injection of fluid under pressure, for example gas. The injection nozzles are arranged in separate homogenization holes distributed in the bottom (12) of the tank (10), and are directed towards the interior of the tank. The injectors (32) inject fluid under pressure through their respective nozzles in such a way that, from the bottom (12) of the tank (10), they give the materials a movement in the injection direction, thus favoring the homogenization and fluidization of the materials inside the tank (10). Injections of fluid under pressure can be carried out successively in an out-of-phase manner over time. Specifically, the fluids are injected intermittently and successively from the injectors (32) closest to the supply area of the tank (10), towards the injectors (32) on the opposite side, which are the closest to the extraction area. from the tank (10). In this way, the risk of differential circulation speeds between the materials is reduced, and the possibility of said materials sedimenting is limited, thus contributing to their homogeneous advance in the tank (10), from the supply area to the area. extraction.
    [0093] As used herein, the term "horizontal" is defined as a plane parallel to the earth's horizon.
    [0095] According to a particular embodiment, the injection nozzles of the injectors (32) are arranged at the bottom (12) of the tank (10) directed towards the interior thereof at angles between 0 ° and 90 ° with respect to the horizontal; all the nozzles at the same angle, or at different angles some nozzles with respect to others. In particular, an angle of 0 ° implies a horizontal arrangement of the nozzles, oriented towards the extraction zone of the tank (10); An angle of 90 ° implies a vertical arrangement of the nozzles, oriented upwards; and the rest of the angles imply a
    [0098] inclined arrangement of the nozzles, oriented towards the extraction zone of the tank (10); for example perpendicular to a sloping bottom (12) of tank (10).
    [0100] According to a particular option, the injection nozzles are arranged substantially vertical, transversely to the substantially horizontal direction of the flow of materials through the tank (10). The internal space of the tank (10) is divided into virtually vertical sectors on the injection nozzles. The injection of fluid under pressure induces a homogenization by vertical sectors in the tank (10), giving the materials an upward vertical movement throughout the height of the tank (10). In this way, the materials in fermentation move according to a horizontal progression under the action of the thrust of the feeding of the materials to be treated, and according to a vertical movement by the injection of fluid from the bottom (12) of the tank ( 10).
    [0102] According to a particular embodiment illustrated in Figures 1 and 4, the bottom (12) of the tank (10) has a slope with an angle of inclination 9 with respect to the horizontal. The slope is oriented in such a way that the fermentation materials and, especially if there are any, the heavy particles occasionally settled at the bottom (12) of the tank (10), are directed by gravity from the orifices of the supply area, specifically the loading holes (22) and, if any, the recirculation holes (28), towards the holes in the extraction zone, specifically the discharge holes (42) for digested materials and the disposal holes (52) of sedimentable matter. In this way, if undesirable heavy particles accumulate at the low point of the bottom (12) of the tank (10), they leave the enclosure by gravity through the elimination holes (52).
    [0104] The angle of inclination 9 is adapted to the nature and the granulometry of the materials to be treated, so that the circulation is progressive and compatible with the transformation of organic materials under the action of fermentation.
    [0106] According to a particular embodiment, the bottom (12) of the tank (10) is inclined at an angle 9 of between 15 ° and 35 ° with respect to the horizontal; and according to a more particular embodiment 30 ° with respect to the horizontal.
    [0107] According to a particular embodiment in which the bottom (12) of the tank (10) is inclined, one or more injection nozzles are arranged horizontally. By way of explanatory example, this implies that in the case of a bottom (12) inclined 30 ° with respect to the horizontal, the nozzles form 30 ° with the bottom (12) of the tank (10). In this way, pressurized fluid is injected through these nozzles in the same direction as the advance of the materials inside the tank (10). This arrangement makes it possible to create a pneumatic thrust in the perimeter close to the nozzle that favors the advance of the materials, and especially of the heavy particles occasionally settled on the bottom (12) of the tank (10); in addition to avoiding the penetration by gravity of these heavy particles in the respective orifices of the nozzles. Optionally, injection nozzles are arranged horizontally facing the removal hole or holes (52) located at the low point of the tank (10). In this way, a mechanical or pneumatic action is empowered through these nozzles, designed to unblock, where appropriate, all or part of the removal orifice or holes (52), in the field of maintenance of the work , without direct intervention on said orifices, liable to represent a major disturbance in the functioning of the digester.
    [0109] According to another particular embodiment in which the bottom (12) of the tank (10) is inclined, one or more injection nozzles are arranged vertically. By way of explanatory example, this implies that in the case of a bottom (12) inclined 30 ° with respect to the horizontal, the nozzles form 120 ° with the bottom (12) of the tank (10). This arrangement makes it possible to print an upward vertical movement on the materials over the entire height of the tank (10) that favors the vertical homogenization of the materials.
    [0111] According to another particular embodiment in which the bottom (12) of the tank (10) is inclined, one or more nozzles are arranged perpendicularly to the bottom (12) of the tank (10). By way of explanatory example, this implies that in the case of a bottom (12) inclined 30 ° with respect to the horizontal, the nozzles form 90 ° with respect to the bottom (12) of the tank (10). This arrangement allows the materials to have an upward oblique movement that favors the homogenization and advancement of the materials inside the tank (10).
    [0113] According to an option shown in Figures 1 and 4, the nozzles are arranged at the bottom (12) of the tank (10) according to different directions, some nozzles vertically, others inclined and others horizontally. In particular, the nozzles can be arranged so that those closest to the supply zone are directed vertically, other adjacent nozzles are directed in an inclined manner, and the rest of the nozzles, arranged between the inclined nozzles and the extraction zone, are directed horizontally.
    [0115] The nozzles can be arranged at the same distance from each other or at different distances. According to a particular option, the distance between the nozzles is greater than 0.5 m.
    [0116] The injectors (32) can be of different sizes. According to a particular option, the length of the injectors (32) can be between 0.75 and 2 m.
    [0118] According to a particular embodiment, the installation comprises one or more doors made in the wall of the tank (10) for access to the interior thereof, and to be able to carry out, for example, maintenance tasks.
    [0120] According to a second aspect, the present invention provides a process for the anaerobic digestion of residues containing biodegradable organic matters, by means of the installation of the present invention.
    [0122] According to the process of the present invention, the materials to be treated are introduced into the tank (10) by the supply means (20); the homogenization means (30) guarantee the homogenization and fluidization of the materials inside the tank (10); thanks to a push feed, the materials circulate inside the tank (10) from the supply means (20) towards the discharge means (40) and the elimination means (50); the digested materials are extracted by the discharge means (40); the sedimentable matters are extracted by the elimination means (50); and by the recirculation circuit (60) a recirculation of digested materials is carried out between the discharge means (40) and the supply means (20).
    [0124] As mentioned above, the present invention takes advantage of the geometry of the tank (10) to carry out, on the one hand, the extraction and, on the other, the gravitational recirculation of the fermented materials. The static pressure generated by the height of the fermentation materials in the tank (10) is transmitted
    [0127] directly to the materials inside the recirculation circuit (60), driving them towards the supply means (20).
    [0129] Optionally, the residues whose degradation the present invention is aimed at are previously conditioned in the form of a paste, said paste being able to be fibrous, but, in any case, compact. In particular, the waste can be mixed in the storage tank (26) with water, for example process water from the digested matter dehydration process, and / or with recirculated materials from the discharge means (40). The mixture can be fully or partially heated before being introduced into the digester.
    [0131] According to a particular embodiment, the materials are homogenized inside the tank (10) by means of the homogenization means (30) intermittently and successively. The injection nozzles inject fluid under pressure intermittently and successively, from the injectors (32) closest to the tank supply area (10), towards the injectors (32) closest to the tank extraction area (10 ).
    [0133] According to a particular embodiment, in which the installation has one or more recirculation holes (28) and an auxiliary recirculation circuit (62), the digested materials are recirculated through the auxiliary circuit (62) towards the recirculation holes (28)
    [0135] Thanks to the particular characteristics of the present invention, the sedimentable materials are extracted exclusively through the elimination holes (52), and by not mixing with the materials extracted through the discharge holes (42), the recirculation of the undesirable particles that can form part of said sedimentable matter, such as pebbles, glass, metallic compounds, etc.
    [0137] This implies several improvements over other facilities of the state of the art. In particular, by not recirculating or reintroducing the undesirable particles into the tank (10) the space occupied by said materials is minimized, thus maximizing the useful volume in the tank (10) for digestion; installation wear is reduced; the flow of materials is improved; It is not necessary to implement any additional system that separates the undesirable particles from the rest of the recirculated matter before their introduction into the tank (10); and ultimately, the process of digestion is carried out in a more efficient way, with lower energy costs and maintenance, and the useful life of the installation is improved.
    [0139] Although the present invention has been described with reference to particular embodiments thereof, those skilled in the art will be able to make modifications and variations to the above teachings without thereby departing from the scope and spirit of the present invention.
    1
    权利要求:
    Claims (16)
    [1]
    1. Installation of anaerobic digestion of waste containing biodegradable materials, characterized in that it comprises:
    - a digester in the form of a closed cylindrical tank (10), lacking internal partitions and internal mechanical equipment;
    - Supply means (20) for materials to be treated in the digester, comprising one or more loading conduits that lead to the tank (10) through respective loading holes (22), the loading holes being distributed to different heights in a first portion of the tank wall (10);
    - Homogenization means (30), comprising injectors (32) with respective fluid injection nozzles, the injection nozzles being arranged in respective homogenization holes distributed at the bottom (12) of the tank (10), and directed towards the interior of the tank, to favor the homogenization and fluidization of the materials;
    - Discharge means (40) intended for the extraction of digested materials, comprising one or more discharge conduits that exit the tank (10) through respective discharge holes (42), the discharge holes being distributed at different heights in a second portion of the tank wall (10), diametrically opposite the first portion;
    - Elimination means (50) intended exclusively for the extraction of sedimentable matter, comprising one or more elimination conduits that exit the tank (10) through respective elimination holes (52), the elimination holes being in a third portion of the tank wall (10), diametrically opposite to the first portion and in the lower part of the tank, so that the disposal ducts run completely independently of the discharge ducts without joining them; Y
    - a recirculation circuit (60) between the discharge means (40) and the supply means (20).
    [2]
    Installation according to claim 1, in which the supply means (20) comprise one or more recirculation holes (28) distributed in the first portion of the tank wall (10), the recirculation holes (28) being Intended for the entry of recirculated materials into the tank (10).
    [3]
    Installation according to claim 2, comprising an auxiliary recirculation circuit (62) between the recirculation circuit (60) and the recirculation holes (28), the auxiliary circuit (62) being intended for the transit of part or all of the recirculated matter towards the recirculation holes (28).
    [4]
    Installation according to any of the preceding claims, in which:
    - the first portion of the tank wall (10) is comprised between two meridian planes forming an angle α of 180 ° or less with each other;
    - the second portion of the tank wall (10) is comprised between two meridian planes forming an angle α of 180 ° or less with each other; and - the third portion of the tank wall (10) is comprised between two meridian planes which form an angle p of 120 ° or less with each other.
    [5]
    Installation according to any of the preceding claims, comprising a dehydration system (46) in which digested materials are treated.
    [6]
    Installation according to any of the preceding claims, in which the injection nozzles are directed towards the interior of the tank (10) at angles between 0 ° and 90 ° with respect to the horizontal.
    [7]
    Installation according to any of the preceding claims, in which the bottom (12) of the tank (10) is inclined.
    [8]
    Installation according to claim 7, in which the bottom (12) of the tank (10) is inclined at an angle 9 of between 15 ° and 35 ° with respect to the horizontal.
    [9]
    Installation according to claim 8, in which the bottom (12) of the tank (10) is inclined at an angle 9 of 30 ° with respect to the horizontal.
    [10]
    Installation according to any one of claims 7 to 9, in which one or more injection nozzles are arranged horizontally.
    [11]
    Installation according to any one of claims 7 to 10, in which one or more injection nozzles are arranged vertically.
    [12]
    Installation according to any one of claims 7 to 11, in which one or more injection nozzles are arranged perpendicular to the bottom (12) of the tank (10).
    [13]
    Installation according to any of the preceding claims, comprising one or more doors made in the wall of the tank (10), for access to the interior thereof.
    [14]
    14. Anaerobic digestion process of waste containing biodegradable materials, by means of the installation defined in any of claims 1 to 13, characterized in that the materials to be treated are introduced into the tank (10) by the supply means (20); the homogenization means (30) guarantee the homogenization and fluidization of the materials inside the tank (10); thanks to a push feeding, the materials circulate inside the tank from the supply means (20) towards the discharge means (40) and the elimination means (50); the digested materials are extracted by the discharge means (40); the sedimentable matters are extracted by the elimination means (50); and by the recirculation circuit (60) a recirculation of digested materials is carried out between the discharge means (40) and the supply means (20).
    [15]
    15. Process according to claim 14, in which the materials within the tank (10) are homogenized by the homogenization means (30) intermittently and successively.
    [16]
    16. Process according to any of claims 14 or 15, by means of an installation with one or more recirculation holes (28) and an auxiliary recirculation circuit (62), so that the digested materials are recirculated through the auxiliary circuit (62) towards the recirculation holes (28).
    1
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    同族专利:
    公开号 | 公开日
    ES2792776B2|2021-03-31|
    CN113845997A|2021-12-28|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US4233155A|1978-11-22|1980-11-11|Hamworthy Engineering Limited|Apparatuses for the anaerobic digestion of natural organic waste|
    EP0074290A1|1981-07-29|1983-03-16|Union Industrielle Et D'entreprise|Process and installation for realizing the degradation of organic products, by-products and wastes in an anaerobic medium|
    ES2315062A1|2005-11-21|2009-03-16|Bledeng, S.A.|System for the treatment of bodegas spills, through a hybrid anaerobio and afteraerous biological process. |
    WO2018025189A2|2016-08-02|2018-02-08|Grupo Rotoplas, S.A.B. De C.V.|Anaerobic bioreactor|
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