WO2017109305A1 - Procede de production de biomethane par epuration de biogaz issu d'installations de stockage de dechets non-dangereux (isdnd) et installation pour la mise en œuvre du procede - Google Patents
Procede de production de biomethane par epuration de biogaz issu d'installations de stockage de dechets non-dangereux (isdnd) et installation pour la mise en œuvre du procede Download PDFInfo
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- WO2017109305A1 WO2017109305A1 PCT/FR2016/052937 FR2016052937W WO2017109305A1 WO 2017109305 A1 WO2017109305 A1 WO 2017109305A1 FR 2016052937 W FR2016052937 W FR 2016052937W WO 2017109305 A1 WO2017109305 A1 WO 2017109305A1
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- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2230/00—Processes or apparatus involving steps for increasing the pressure of gaseous process streams
- F25J2230/04—Compressor cooling arrangement, e.g. inter- or after-stage cooling or condensate removal
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2230/00—Processes or apparatus involving steps for increasing the pressure of gaseous process streams
- F25J2230/30—Compression of the feed stream
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2245/00—Processes or apparatus involving steps for recycling of process streams
- F25J2245/02—Recycle of a stream in general, e.g. a by-pass stream
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2260/00—Coupling of processes or apparatus to other units; Integrated schemes
- F25J2260/02—Integration in an installation for exchanging heat, e.g. for waste heat recovery
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25J—LIQUEFACTION, SOLIDIFICATION OR SEPARATION OF GASES OR GASEOUS OR LIQUEFIED GASEOUS MIXTURES BY PRESSURE AND COLD TREATMENT OR BY BRINGING THEM INTO THE SUPERCRITICAL STATE
- F25J2270/00—Refrigeration techniques used
- F25J2270/90—External refrigeration, e.g. conventional closed-loop mechanical refrigeration unit using Freon or NH3, unspecified external refrigeration
- F25J2270/904—External refrigeration, e.g. conventional closed-loop mechanical refrigeration unit using Freon or NH3, unspecified external refrigeration by liquid or gaseous cryogen in an open loop
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
- Y02C20/20—Capture or disposal of greenhouse gases of methane
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02C—CAPTURE, STORAGE, SEQUESTRATION OR DISPOSAL OF GREENHOUSE GASES [GHG]
- Y02C20/00—Capture or disposal of greenhouse gases
- Y02C20/40—Capture or disposal of greenhouse gases of CO2
Definitions
- the subject of the invention is a process for producing bio-methane by purifying biogas from non-hazardous waste storage facilities (ISDND). It also relates to an installation for implementing the method.
- the present invention relates to a method of treatment by coupling a membrane permeation and a cryogenic distillation of a gaseous stream containing at least methane, carbon dioxide, air gases (nitrogen and oxygen) and pollutants (H 2 S and volatile organic compounds (VOCs)).
- the objective is to produce a gaseous stream rich in methane whose methane content is in line with the needs of its use and to limit as much as possible the impact of CH 4 discharges into the atmosphere (high greenhouse gas) ).
- the invention relates in particular to the purification of biogas from non-hazardous waste storage facilities, hereinafter ISDND (Non-Hazardous Waste Storage Facility), with the aim of producing biomethane in accordance with the injection into a natural gas system or in local use as a vehicle fuel.
- ISDND Non-Hazardous Waste Storage Facility
- ISDNDs The anaerobic digestion of organic wastes in ISDNDs produces a significant amount of biogas throughout ISDND's lifetime and even several years after shutdown and closure of ISDND.
- methane and carbon dioxide - biogas is a powerful greenhouse gas; At the same time, it constitutes a significant source of renewable energy in the context of the scarcity of fossil fuels.
- Biogas contains several polluting compounds and must be purified to allow commercial development. There are several processes for recovering and purifying biogas.
- the biogas mainly contains methane (CH 4 ) and carbon dioxide (C0 2 ) in varying proportions depending on the method of production.
- the gas also contains a proportion of air gases (nitrogen and oxygen) and, to a lesser extent, water, hydrogen sulphide, and volatile organic compounds. (VOC).
- air gases nitrogen and oxygen
- VOC volatile organic compounds.
- the biogas comprises, on dry gas, from 30 to 60% of methane, from 15 to 50% of C0 2 , from 0 to 30% of nitrogen, from 0 to 6% of oxygen, from 0 to at 1% H 2 S and from a few tens to a few thousand milligrams per normal cubic meters of VOCs and a number of other trace impurities.
- Biogas is valued in different ways. It may, after partial treatment, be recovered near the production site to provide heat, electricity or both (cogeneration).
- the high content of carbon dioxide reduces its calorific value, increases the compression and transport costs and limits the economic interest of its valuation to this use of proximity.
- Biomethane thus completes the natural gas resources with a renewable part produced in the heart of the territories. It is usable for exactly the same uses as natural gas of fossil origin. It can feed a natural gas network, a filling station for vehicles. It can also be liquefied to be stored and transported as liquefied natural gas (LNG).
- LNG liquefied natural gas
- the modes of valorization of the biomethane are determined according to the local contexts: local energy needs, possibilities of valorization as biomethane fuel, existence close to networks of distribution or transport of natural gas in particular. Creating synergies between the different actors working on a territory (farmers, industrialists, public authorities), the production of biomethane helps the territories to acquire a greater energy autonomy. It should be noted that, depending on the country, environmental regulations often impose restrictions on releases to the atmosphere. It is indeed necessary to develop technologies to reduce the impact of greenhouse gases (CH 4) and pollutants (H2S and VOC) content in the biogas.
- CH 4 greenhouse gases
- H2S and VOC pollutants
- the document US Pat. No. 8,221,524 B2 describes a process for enriching a gas with CH 4 by up to 88% by different recycling steps.
- the process consists of compressing the gas stream and then passing it over an adsorbent to remove VOCs.
- the gas stream is then subjected to a membrane separation step and then to a pressure swing adsorption step (PSA).
- PSA pressure swing adsorption step
- the adsorbent used in the PSA is of the CMS (carbon molecular sieve) type and makes it possible to eliminate N 2 and a small portion of ⁇ 0 2 .
- EPI 979446 discloses a biogas purification process of removing H 2 S, compressing the gas, filtering it to remove particles. The gas is then subjected to a membrane separation step to remove CO 2 and ⁇ 0 2 , drying by passage in a PSA then in different filters and finally again in a PSA to eliminate the N 2 . The gas is finally liquefied.
- US2004 / 0103782 discloses a biogas purification process of removing H 2 S, compressing the gas, filtering it to remove the particles, subjecting it to a pressure swing adsorption (PSA) step for remove VOCs, then membrane separation to remove most of the C0 2 and a fraction of the 0 2 .
- Document US Pat. No. 5,486,227 describes a process for purifying and liquefying a gaseous mixture consisting in subjecting the stream to a temperature-modulated adsorption (TSA) to eliminate H 2 S in particular and then to a pressure-swing adsorption (PSA). to eliminate the CO 2 in particular, then finally to a cryogenic separation to eliminate the nitrogen and to retain only the methane.
- TSA temperature-modulated adsorption
- PSA pressure-swing adsorption
- US5964923 and US5669958 disclose a method of treating a gaseous effluent comprising dehydrating the gas, condensing it through an exchanger, subjecting the gas to membrane separation, and then cryogenic separation.
- US2010 / 077796 discloses a purification process of subjecting the gaseous stream to a membrane separation, treating the permeate in a distillation column, and then mixing the methane gas from the column, after vaporization, with the retentate obtained at room temperature. the outcome of membrane separation.
- Documents US3989478 and FR2917489 describe cryogenic systems for purifying a methane-rich stream. Both systems use a PSA to knock down CO 2 before the liquefaction stage.
- the document EP0772665 describes the use of a cryogenic distillation column for the separation of the mine gas composed mainly of CH 4 , CO 2 and N 2 .
- the document WO 2013/052325 A1 describes a process for producing methane combining a step of purifying VOCs by means of a PSA, then of separating C02 by means of an TSA and finally a cryogenic distillation allowing to suppress ⁇ 02 and ⁇ 2.
- the membrane separation referred to is a membrane separation for suppressing CO2 and thus substituting for TSA. It does not remove ⁇ 02 and therefore does not solve the problem of explosiveness in the distillation column.
- WO 2011/097162 Al discloses a biogas production process containing at least three steps are the removal of VOC using a PSA, the removal of C0 2 by means of a membrane and removing the residual C0 2 by means of an ASD.
- the TSA is further followed by a liquefaction unit. No purification in 0 2 is provided and especially the purified gas is treated directly in a liquefaction unit.
- the problem that the invention proposes to solve is that of providing a biogas purification process that complies with the above constraints, that is to say a process that is safe, with optimum yield, producing a biomethane of high quality that is substitutable for natural gas and meets environmental standards, in particular the destruction of polluting compounds such as VOCs and compounds with high potency like CH 4 .
- the gas thus produced may be recovered in liquid or gaseous form either by injection into a gas network or else for mobility applications.
- the Applicant has coupled 4 technologies with VAC purification via PSA, a first purification of C0 2 and O 2 by means of membrane separation, and a second C0 2 purification by means of a membrane separation.
- PTSA bias and finally a purification of N 2 and P0 2 by means of a cryogenic separation.
- the subject of the invention is a process for producing bio methane by biogas purification from non-hazardous waste storage facilities (ISDND) according to which:
- the stream of gas to be purified is introduced into at least one adsorber advantageously pressure modulated (PSA) loaded with adsorbents capable of reversibly adsorbing the VOCs,
- PSA pressure modulated
- the depleted VOC gas stream leaving the PSA is subjected to at least one membrane separation to partially separate the CO 2 and O 2 from the gas stream,
- the retentate resulting from the membrane separation is introduced into at least one adsorber advantageously modulated in temperature and pressure (PTSA) loaded with adsorbents capable of reversibly adsorbing most of the remaining C0 2 , the depleted gaseous stream is subjected to C0 2 leaving the PTSA at a cryogenic separation in a distillation column to separate the O 2 and N 2 from the gas stream,
- PTSA temperature and pressure
- the PTSA can be replaced by an adsorber regenerated by vacuum drawdown or depressurization.
- the PSA is regenerated by means of the permeate resulting from a first membrane separation.
- PTSA is regenerated by means of the rich stream CH 4 or N 2 rich distillate from the cryogenic separation.
- the permeate obtained from a second membrane separation is oxidized after mixing with the nitrogen-rich distillate from the cryogenic separation.
- the gas to be purified is dried and then subjected to a desulfurization step.
- the drying step consists in supercharging the gas, from 20 to a few hundred millibars (maximum 500 mbar maximum), also making it possible to avoid air inlets in the pipes.
- the overpressure allows preliminary drying by cooling the biogas between 0.1 and 10 ° C, to condense the water vapor.
- the outgoing gas flow therefore has a pressure of between 20 and 500 mbar and a dew point of between 0.1 ° C. and 10 ° C. at the outlet pressure.
- the desulfurization step ensures the capture of the H 2 S to meet the quality requirements of the network and to avoid too rapid degradation of materials in the following process.
- This treatment is preferably carried out with active carbon or iron hydroxides in tanks with volumes adapted to the amount of H 2 S to be treated. H 2 S is thus transformed into solid sulfur.
- the outgoing gas flow in practice contains less than 5 mg / Nm 3 H 2 S.
- the gas stream to be treated is then compressed.
- the compression is carried out at a pressure of between 8 and 24 bars. This pressure is necessary to enable the operation of the following steps and to reduce the size of the equipment.
- the compression is advantageously carried out with a lubricated screw compressor.
- the implementation of this type of compressor gives the possibility of possibly recovering the heat on the cooling circuit of the oil. In a preferred embodiment and as will be seen later, the heat is recovered to heat the gas that will be used to regenerate the PTSA.
- the next step is to purify the VOC gas stream.
- the stream of gas to be purified is passed through at least one adsorber modulated in pressure (PSA) loaded with adsorbents capable of reversibly adsorbing the VOCs.
- PSA adsorber modulated in pressure
- This step makes it possible to purify the biogas of VOCs (light hydrocarbons, mercaptans, siloxanes, etc.) that are incompatible with the quality requirements of the network and that may pollute the subsequent purification steps (especially the membranes).
- 2 PSAs are used so as to be able to implement the process continuously. Indeed, when the first PSA is saturated with VOC, it is substituted by the second PSA which itself has been previously regenerated.
- the PSA (s) are regenerated by the permeate resulting from the membrane separation. This permeate is composed mainly of C0 2 and a very low content of CH 4 .
- the gas flow at the regeneration outlet is oxidized. In an advantageous embodiment, it is premixed with the N 2 -rich distillate derived from the cryogenic separation, the mixture then being oxidized.
- the PSA regeneration gas flow and the N 2 -rich distillate from the cryogenic separation are oxidized separately.
- the C0 2 is purified from the gas stream.
- the depleted VOC gas stream leaving the PSA is subjected to at least one membrane separation to partially separate the CO 2 and O 2 from the gas stream. More precisely, the selective separation of the membranes makes it possible to carry out a first efficient purification of the biogas by separating a large part of the C0 2 (more than 90%) as well as a part of the O 2 (approximately 50% and in a general way at least 30%, advantageously between 30 and 70%).
- the separation performance of the membrane vis-à-vis the CO 2 and the 0 2 will depend on the permeability of the membrane vis-à-vis these gases.
- Membrane scrubbing can be composed of 1, 2, 3 or 4 stages of membranes depending on the characteristics of the biogas. This step makes it possible to produce a gas with less than 3% C0 2 and with a CH 4 yield greater than 90%.
- two successive membrane separations are carried out. More precisely :
- the depleted VOC gas stream leaving the PSA is subjected to a first membrane separation
- the PSA is regenerated by means of the permeate issuing from said first membrane separation
- the retentate resulting from the first separation is subjected to a second membrane separation
- the permeate resulting from the second membrane separation is reintroduced upstream of the compression.
- the reintroduction of the permeate is carried out between the desulfurization tank and the compressor.
- the next step of the process of the invention consists in carrying out an additional purification of the C0 2 still present in the gas stream. Indeed, the only membrane separation is not sufficient to reach a C0 2 content in the purified gas of 50 ppm before the cryogenic separation step.
- the value of 50 ppm is the limit value beyond which there is a risk of formation of C0 2 crystals that can clog the cryogenic exchangers.
- This step is performed by a PTSA. Choosing a PTSA reduces the size of the tank and reduces cycle times.
- the adsorbent will in particular be selected from the group comprising zeolites.
- 2 PTSAs are used so as to be able to implement the process continuously. Indeed, when the first PTSA is saturated in C0 2 , it is substituted by the second PTSA which itself has been previously regenerated.
- the way to regenerate PTSA depends on the liquid or gaseous nature of the end product rich in methane, recovered.
- the PTSA can be regenerated by means of a nitrogen flow rate resulting from the vaporization of an external source of liquid nitrogen.
- the steam is in this case produced by cooling the gas stream depleted in C0 2 , leaving the PTSA.
- This embodiment although it can be implemented, is not optimal because it requires an additional source of liquid nitrogen.
- the PTSA (s) are regenerated by means of the vaporized gas stream rich in CH 4 .
- the PTSA are sized to avoid that the biomethane produced contains more than 2.5% of C0 2 to ensure a quality compatible with the needs for marketing.
- the next step of the process of the invention consists in separating the nitrogen and P0 2 and then recovering the rich CH 4 stream resulting from this separation.
- the CO 2 depleted gas stream leaving the PTSA is subjected to cryogenic separation in a distillation column.
- the final product that is to say the stream rich in methane, is recovered in the liquid state.
- the liquid rich in methane is withdrawn from the distillation column.
- the cooling of the flow is carried out within a heat exchanger in contact with an external source of liquid nitrogen, for example.
- the final product that is to say the stream rich in methane, is recovered in the gaseous state.
- the cooling gas stream depleted in CO 2 is cooled by heat exchange with the liquid CH 4 withdrawn from the distillation column;
- the invention also relates to an installation for the production of bio methane by biogas purification from non-hazardous waste storage facilities (ISDND) implementing the method described above.
- the installation comprises:
- a compressor capable of compressing the biogas at a pressure of 8 and 24 bar
- Figure 1 is a schematic representation of an installation of the invention according to a particular embodiment.
- the method of the invention aims to produce gaseous biomethane optimizing the energy expenditure.
- the plant comprises a biogas source to be treated (1), a drying unit (2), a desulfurization unit (3), a compression unit (4), a VOC purification unit (5), a first purification unit of C0 2 (6), a second unit for purifying C0 2 (7), a cryo distillation unit (8), a liquid nitrogen storage unit (9), a unit oxidation (10) and finally a unit for recovering gaseous methane (11). All devices are interconnected by pipes.
- the drying unit (2) comprises a suppressor (12) and a heat exchanger (13) and a separator pot (14). As already said, this step allows to boost from 20 to a few hundred millibars (500 mbar maximum relative) gas. The cooling of the gas between 0.1 and 10 ° C allows drying.
- the outgoing gas stream (15) therefore has a pressure of between 20 and 500 mbar and a dew point of between 0.1 ° C. and 10 ° C. at the outlet pressure.
- the desulfurization unit (3) is in the form of a tank (16) loaded with activated carbons or with iron hydroxides. This unit ensures the capture of H 2 S and transform it into solid sulfur.
- the outgoing gas flow (17) in practice contains less than 5 mg / Nm3 of H 2 S.
- the compression unit (4) is in the form of a lubricated screw compressor (18). This compressor compresses the gas stream (17) at a pressure of between 8 and 24 bar.
- the unit further comprises a module (19) for recovering heat generated by the oil cooling circuit.
- the outflow is designated in Figure 1 by the reference (20).
- the VOC purification unit (5) comprises 2 PSAs (21, 22). They are loaded with adsorbents chosen specifically to allow the adsorption of VOCs, and their subsequent desorption during regeneration.
- the PSAs function alternately in production mode and in regeneration mode.
- the PSAs (21, 22) are supplied with gaseous flow at their lower part.
- the pipe in which the gas flow (20) flows is split into two pipes (23, 24), each equipped with a valve (25, 26) and feeding the lower part respectively of the first PSA (21) and the second PSA ( 22).
- the valves (25, 26) will be alternately closed depending on the saturation level of the PSAs.
- the valve (25) is closed and the valve (26) is opened to begin charging the second PSA (22).
- From the upper part of each of the PSA opens a pipe respectively (27 and 28).
- Each of them splits into 2 pipes respectively (29, 30) and (30, 31).
- the purified VOC stream from the first PSA flows through the pipe (29) while the purified VOC stream from the second PSA flows through the pipe (31).
- the two pipes are joined to form a single pipe (51) supplying the C02 purification unit (6).
- the regenerative gas flows in the pipes (30, 32). It appears at the bottom of the PSA.
- a pipe (33) equipped with a valve (35) opens the first PSA (21).
- a pipe (34) equipped with a valve (36) opens out of the second PSA (22).
- the pipes (33, 34) are joined upstream of the valves (35, 36) to form a common pipe (37).
- This pipe is connected to the oxidation unit (10).
- the first C0 2 purification unit (6) combines two membrane separation stages (38, 39). The membranes are chosen to allow the separation of about 90% of the CO 2 and about 50% of the O 2 .
- the permeate charged with CO 2 , O 2 and a very small proportion of CH 4 from the first membrane separation is used to regenerate PS A (21, 22). It circulates in the pipe (40) and then alternately in the pipes (30, 32) depending on the operating mode of the PSA.
- the retentate from the first separation is then directed to the second membrane separation (39).
- the permeate from the second membrane separation is recycled through a pipe connected to the main circuit upstream of the compressor (18). This step makes it possible to produce a gas (42) with less than 3% of C0 2 and with a CH 4 yield> 90%.
- the second C0 2 purification unit (7) combines 2 PTSAs (43, 44). They are loaded with adsorbents of zeolite type. They are each connected to pipes in a model identical to that of PSA previously described. They also work in a production mode or a regeneration mode. In production mode, the gas stream (42) alternately feeds the PTSAs (43, 44) through the pipes (45, 46) each equipped with a valve (47, 48). The C02 purified gas stream from the PTSA (43) then flows into the pipe (49). The CO2 purified gas stream from the PTSA (44) then flows through the pipe (50). The two pipes (49, 50) are connected in a single pipe (52) connected to the next unit.
- a pipe (55) equipped with a valve (56) opens the first PTSA (43).
- a pipe (57) equipped with a valve (58) opens out of the second PTSA (44).
- the pipes (55, 57) are joined upstream of the valves (56, 58) to form a common pipe (59). This pipe is connected to the gaseous methane recovery unit (11).
- the cryodistillation unit (8) is fed by the pipe (52) in which circulates the gas stream to be purified. It contains 3 elements respectively a heat exchanger (60), a reboiler (61), a distillation column (62).
- the exchanger (60) is a brazed plate heat exchanger made of aluminum or stainless steel. It cools the gas stream (52) by heat exchange with the liquid methane stream (69) withdrawn from the distillation column (62).
- the gas stream (52) is partially liquefied (63).
- the two-phase flow (63) ensures the reboiling of the bottom reboiler (61) of the column (62) and the generated heat (64) is transferred to the column vessel (62).
- the stream (63) cools in the reboiler (61) and partially condenses (65).
- the partially condensed fluid (65) is expanded by means of a valve (66) at a pressure of between 1.1 and 5 bar absolute.
- the fluid then in the liquid state (67) is sent into the head of the column (62).
- the temperature must be higher than 90.7K to avoid solidifying the methane
- the liquid (67) then separates into the column (62) to form a gas (68) through the condenser (71).
- the condenser (71) is cooled by liquid nitrogen bubbling from an external source (9).
- the liquid nitrogen is converted into vaporized nitrogen (72).
- the gas (68) transfers its frigories into the exchanger (60) in contact with the gas stream (52) from PTSAs (43, 44).
- the gas stream obtained (70) loaded with C0 2 and O 2 is sent to the oxidation unit (10).
- the gas stream (70) is oxidized in a common oxidation unit (10) with the flow (37) resulting from regeneration of the PSA, loaded C0 2, 0 2 and VOCs.
- the oxidation is carried out in separate units.
- the liquid (69) of the distillation column vessel (62) is fed to the reboiler (61) where it partially vaporizes.
- the formed gas (64) is returned to the column vessel (62).
- the remaining liquid (69) vaporizes in the exchanger (60) to form a pure methane gas product (73).
- the gas stream (73) serves to regenerate the PTSAs (43, 44).
- the flow (73) is further preheated by the heat generated by the compressor oil cooling circuit (18), which passes from the module (19) through a line (74).
- methane is recovered in the gaseous state after regeneration of PTSA.
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
- Separation Of Gases By Adsorption (AREA)
- Separation By Low-Temperature Treatments (AREA)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
Abstract
Description
Claims
Priority Applications (15)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
BR112018012788-4A BR112018012788B1 (pt) | 2015-12-24 | 2016-11-10 | Método e instalação para produzir biometano por purificação de biogás a partir de instalações de armazenamento de resíduos não perigosos |
DK16809983.6T DK3393621T3 (da) | 2015-12-24 | 2016-11-10 | Fremgangsmåde til fremstilling af biomethan ved rensning af biogas fra anlæg til opbevaring af ufarligt affald samt anlæg til udøvelse af fremgangsmåden |
CA3009566A CA3009566C (fr) | 2015-12-24 | 2016-11-10 | Procede de production de biomethane par epuration de biogaz issu d'installations de stockage de dechets non-dangereux (isdnd) et installation pour la mise en oeuvre du procede |
RS20220023A RS62802B1 (sr) | 2015-12-24 | 2016-11-10 | Postupak proizvodnje biometana prečišćavanjem biogasa nastalog iz postrojenja za skladištenje bezopasnog otpada (isdnd) i postrojenje za izvođenje postupka |
HRP20220113TT HRP20220113T1 (hr) | 2015-12-24 | 2016-11-10 | Postupak proizvodnje biometana pročišćavanjem bioplina nastalog iz postrojenja za skladištenje bezopasnog otpada i postrojenje za izvođenje postupka |
ES16809983T ES2903144T3 (es) | 2015-12-24 | 2016-11-10 | Procedimiento de producción de biometano mediante la purificación de biogás de instalaciones de almacenamiento de desechos no peligrosos e instalación para la implementación del procedimiento |
EP16809983.6A EP3393621B1 (fr) | 2015-12-24 | 2016-11-10 | Procédé de production de biométhane par épuration de biogaz issu d'installations de stockage de déchets non-dangereux et installation pour la mise en oeuvre du procédé |
US16/065,644 US10905995B2 (en) | 2015-12-24 | 2016-11-10 | Method for producing biomethane by purifying biogas from non-hazardous waste storage facilities and facility for implementing the method |
SI201631443T SI3393621T1 (sl) | 2015-12-24 | 2016-11-10 | Postopek za pridobivanje biometana s čiščenjem bioplina iz odlagališč nenevarnih odpadkov in postrojenje za izvajanje postopka |
AU2016378831A AU2016378831B2 (en) | 2015-12-24 | 2016-11-10 | Method for producing biomethane by purifying biogas from non-hazardous waste storage facilities and facility for implementing the method |
RU2018122940A RU2721698C2 (ru) | 2015-12-24 | 2016-11-10 | Способ получения биометана путем очистки биогаза из хранилищ неопасных отходов и установка для осуществления способа |
CN201680079846.6A CN108602007A (zh) | 2015-12-24 | 2016-11-10 | 通过净化来自非危险废物储存设施的生物气生产生物甲烷的方法和实施这种方法的设施 |
MX2018007771A MX2018007771A (es) | 2015-12-24 | 2016-11-10 | Metodo para producir biometano al purificar biogas de instalaciones de almacenamiento de desechos no peligrosos e instalacion para implementar el metodo. |
PL16809983T PL3393621T3 (pl) | 2015-12-24 | 2016-11-10 | Sposób wytwarzania biometanu poprzez oczyszczanie biogazu pochodzącego z instalacji składowania odpadów innych niż niebezpieczne (isdnd) oraz instalacja do realizacji tego sposobu |
HK18115950.6A HK1256981A1 (zh) | 2015-12-24 | 2018-12-12 | 通過淨化來自非危險廢物儲存設施的生物氣生產生物甲烷的方法和實施這種方法的設施 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
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FR1563357 | 2015-12-24 | ||
FR1563357A FR3046086B1 (fr) | 2015-12-24 | 2015-12-24 | Procede de production de biomethane par epuration de biogaz issu d'installations de stockage de dechets non-dangereux (isdnd) et installation pour la mise en œuvre du procede |
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EP (1) | EP3393621B1 (fr) |
CN (1) | CN108602007A (fr) |
AU (1) | AU2016378831B2 (fr) |
BR (1) | BR112018012788B1 (fr) |
CA (1) | CA3009566C (fr) |
DK (1) | DK3393621T3 (fr) |
ES (1) | ES2903144T3 (fr) |
FR (1) | FR3046086B1 (fr) |
HK (1) | HK1256981A1 (fr) |
HR (1) | HRP20220113T1 (fr) |
HU (1) | HUE056933T2 (fr) |
MX (1) | MX2018007771A (fr) |
PL (1) | PL3393621T3 (fr) |
PT (1) | PT3393621T (fr) |
RS (1) | RS62802B1 (fr) |
RU (1) | RU2721698C2 (fr) |
SI (1) | SI3393621T1 (fr) |
WO (1) | WO2017109305A1 (fr) |
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WO2019122660A1 (fr) * | 2017-12-21 | 2019-06-27 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Procédé cryogénique de déazotation d'un gaz de décharge |
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US11291946B2 (en) | 2017-12-21 | 2022-04-05 | L'Air Liquide Société Anonyme pour l'Etude et l'Exploitation des Procédés Georges Claude | Method for distilling a gas stream containing oxygen |
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FR3075659A1 (fr) * | 2017-12-21 | 2019-06-28 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Procede de production d'un courant de gaz naturel a partir d'un courant de biogaz. |
FR3075660A1 (fr) * | 2017-12-21 | 2019-06-28 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Procede de distillation d'un courant gazeux contenant de l'oxygene |
FR3075658A1 (fr) * | 2017-12-21 | 2019-06-28 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Procede de limitation de la concentration d'oxygene contenu dans un courant de biomethane |
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WO2019122662A1 (fr) * | 2017-12-21 | 2019-06-27 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Procédé de limitation de la concentration d'oxygène contenu dans un courant de biométhane |
CN111447985A (zh) * | 2017-12-21 | 2020-07-24 | 乔治洛德方法研究和开发液化空气有限公司 | 蒸馏含氧气的气体流的方法 |
CN111565821A (zh) * | 2017-12-21 | 2020-08-21 | 乔治洛德方法研究和开发液化空气有限公司 | 从排出气体中除去氮气的低温方法 |
EP3632525A1 (fr) * | 2018-10-02 | 2020-04-08 | Evonik Fibres GmbH | Dispositif et procédé permettant de séparer le méthane d'un mélange gazeux contenant du méthane, du dioxyde de carbone et du sulfure d'hydrogène |
JP7492950B2 (ja) | 2018-10-02 | 2024-05-30 | エボニック オペレーションズ ゲーエムベーハー | メタン、二酸化炭素および硫化水素を含有するガス混合物からメタンを分離するための装置および方法 |
CN112805079A (zh) * | 2018-10-02 | 2021-05-14 | 赢创纤维有限公司 | 用于从含有甲烷、二氧化碳和硫化氢的气体混合物分离甲烷的装置和方法 |
JP2022502241A (ja) * | 2018-10-02 | 2022-01-11 | エボニック ファイバース ゲゼルシャフト ミット ベシュレンクテル ハフツングEvonik Fibres GmbH | メタン、二酸化炭素および硫化水素を含有するガス混合物からメタンを分離するための装置および方法 |
WO2020069868A1 (fr) * | 2018-10-02 | 2020-04-09 | Evonik Fibres Gmbh | Dispositif et procédé de séparation de méthane d'un mélange gazeux contenant du méthane, du dioxyde de carbone et du sulfure d'hydrogène |
RU2790130C2 (ru) * | 2018-10-02 | 2023-02-14 | Эвоник Фибрес Гмбх | Устройство и способ выделения метана из газовой смеси, содержащей метан, диоксид углерода и сероводород |
FR3097450A1 (fr) * | 2019-06-20 | 2020-12-25 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Traitement d’un flux de méthane comprenant des COV et du dioxyde de carbone par combinaison d’une unité d’adsorption et d’une unité de séparation par membrane |
US11351499B2 (en) | 2019-06-20 | 2022-06-07 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Treatment of a methane stream comprising VOCs and carbon dioxide by a combination of an adsorption unit and a membrane separation unit |
EP3756749A1 (fr) * | 2019-06-20 | 2020-12-30 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Traitement d'un flux de méthane comprenant des cov et du dioxyde de carbone par combinaison d'une unité d'adsorption et d'une unité de séparation par membrane |
US20210060486A1 (en) * | 2020-11-11 | 2021-03-04 | Waga Energy | Facility For Producing Gaseous Biomethane By Purifying Biogas From Landfill Combining Membranes, Cryodistillation And Deoxo |
US20230174879A1 (en) * | 2021-12-02 | 2023-06-08 | Stearns, Conrad And Schmidt, Consulting Engineers, Inc. | Method for producing renewable natural gas from biogases containing volatile organic compounds |
FR3129849A1 (fr) * | 2021-12-08 | 2023-06-09 | L'air Liquide Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Installation de production biométhane et de CO2 liquide avec un moyen d’éviter l’accumulation d’hydrogène et d’oxygène |
WO2023104815A1 (fr) * | 2021-12-08 | 2023-06-15 | L'air Liquide, Societe Anonyme Pour L'etude Et L'exploitation Des Procedes Georges Claude | Installation de production biométhane et de co2 liquide avec un moyen d'éviter l'accumulation d'hydrogène et d'oxygène |
Also Published As
Publication number | Publication date |
---|---|
FR3046086A1 (fr) | 2017-06-30 |
RS62802B1 (sr) | 2022-02-28 |
AU2016378831B2 (en) | 2021-12-09 |
CA3009566C (fr) | 2023-08-29 |
FR3046086B1 (fr) | 2018-01-05 |
RU2721698C2 (ru) | 2020-05-21 |
HK1256981A1 (zh) | 2019-10-11 |
US20190001263A1 (en) | 2019-01-03 |
RU2018122940A3 (fr) | 2020-01-24 |
CA3009566A1 (fr) | 2017-06-29 |
PL3393621T3 (pl) | 2022-02-21 |
MX2018007771A (es) | 2019-01-10 |
EP3393621B1 (fr) | 2022-01-05 |
HRP20220113T1 (hr) | 2022-04-15 |
BR112018012788A2 (pt) | 2018-12-04 |
US10905995B2 (en) | 2021-02-02 |
AU2016378831A1 (en) | 2018-07-12 |
CN108602007A (zh) | 2018-09-28 |
PT3393621T (pt) | 2022-01-12 |
DK3393621T3 (da) | 2022-01-17 |
EP3393621A1 (fr) | 2018-10-31 |
HUE056933T2 (hu) | 2022-03-28 |
SI3393621T1 (sl) | 2022-02-28 |
BR112018012788B1 (pt) | 2022-12-13 |
RU2018122940A (ru) | 2020-01-24 |
ES2903144T3 (es) | 2022-03-31 |
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