CN112399881A - Biogas high quality system - Google Patents
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- CN112399881A CN112399881A CN201880095088.6A CN201880095088A CN112399881A CN 112399881 A CN112399881 A CN 112399881A CN 201880095088 A CN201880095088 A CN 201880095088A CN 112399881 A CN112399881 A CN 112399881A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/22—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by diffusion
- B01D53/229—Integrated processes (Diffusion and at least one other process, e.g. adsorption, absorption)
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/14—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by absorption
- B01D53/1456—Removing acid components
- B01D53/1475—Removing carbon dioxide
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/22—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols by diffusion
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/26—Drying gases or vapours
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/75—Multi-step processes
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2258/00—Sources of waste gases
- B01D2258/05—Biogas
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- 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
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- 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
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- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Environmental & Geological Engineering (AREA)
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- Gas Separation By Absorption (AREA)
- Separation Using Semi-Permeable Membranes (AREA)
Abstract
本发明涉及一种沼气高品质化系统，其特征在于，包括：前处理装置，用于对沼气中的二氧化硫进行处理；吸收用膜接触器，从吸收剂罐接收吸收剂的供应并使其与从上述前处理装置流入的沼气发生反应，从而排出吸收二氧化碳之后的吸收剂并将纯净的甲烷排出到甲烷储藏槽中；以及，剥离用膜接触器，从上述吸收用膜接触器接收吸收二氧化碳之后的吸收剂的供应并从吸收剂分离出二氧化碳并排出到二氧化碳储藏槽中的同时将分离二氧化碳之后的吸收剂排出到上述吸收剂罐中。
This invention relates to a biogas quality improvement system, characterized by comprising: a pretreatment device for treating sulfur dioxide in biogas; an absorption membrane contactor for receiving an absorbent supply from an absorbent tank and reacting it with biogas flowing in from the pretreatment device, thereby discharging the absorbent after carbon dioxide absorption and discharging pure methane into a methane storage tank; and a stripping membrane contactor for receiving an absorbent supply after carbon dioxide absorption from the absorption membrane contactor, separating carbon dioxide from the absorbent and discharging it into a carbon dioxide storage tank while simultaneously discharging the absorbent after carbon dioxide separation into the absorbent tank.
Description
Technical Field
The invention relates to a high-quality methane system which can realize moisture removal, desulfurization, carbon dioxide separation, pure methane acquisition, absorbent regeneration and the like of methane through one system.
Background
Organic wastes such as livestock manure and restaurant waste water can be subjected to anaerobic digestion in a digester to produce biogas consisting of about 65% methane, 35% carbon dioxide and a small amount of impurities such as hydrogen sulfide.
The biogas as described above is mainly used as power generation or low-grade fuel at present, but has problems of low power production efficiency and difficulty in heat regulation because the general biogas contains a high content of carbon dioxide as described above, and thus has many limitations in use as alternative fuel.
Therefore, a bio-Compressed Natural Gas (CNG) production apparatus (system) that can produce high-purity methane instead of general industrial natural gas by separating biogas into methane and carbon dioxide is being actively developed recently.
As a method for separating methane and carbon dioxide from biogas, for example, a water washing method for separating methane and carbon dioxide by utilizing a difference in gas solubility, a Pressure Swing Adsorption (PSA) method for separating by utilizing a difference in adsorption characteristics of gaseous substances, a membrane separation method for separating by a membrane contactor utilizing a difference in polarity of gas molecules, and the like can be used.
As an example of the prior art, there is disclosed a biogas purification apparatus in korean registered patent No. 1862769, comprising: a housing; a hollow fiber separation membrane disposed in the housing; an absorption module which is an absorbent-filled space defined by the outside of the hollow fiber separation membrane constituting the hollow fiber separation membrane and the inside of the housing; an absorbent supply unit for supplying an absorbent to the absorbent filling space of the absorption module; a biogas supply unit for supplying biogas to the inside of the hollow fibers of the hollow fiber separation membrane of the absorption module; and a separation membrane module installed at a rear end of the absorption module, supplying only biogas including methane that is not dissolved in the absorbent in a process of passing through the inside of the hollow fiber of the absorption module, and including a gas separation membrane for removing moisture; wherein the absorbent supplied to the absorbent filling space of the absorption module is discharged from the absorption module, and the biogas purification apparatus further comprises: and a decompression pump connected to the separation membrane module to adjust the pressure inside the separation membrane module to 20Torr to 70 Torr.
However, the above-mentioned technologies only disclose technologies related to a membrane contactor for improving the quality of biogas, but water, sulfur dioxide, and the like contained in biogas still need to be treated by separate processes.
Disclosure of Invention
The present invention has been made to solve the above-described conventional problems, and an object of the present invention is to provide a system for improving the quality of biogas, which can remove moisture, desulfurize, separate carbon dioxide, obtain pure methane, regenerate an absorbent, and the like in one system.
In order to achieve the above object, a system for improving the quality of methane gas according to the present invention (hereinafter, referred to as "system of the present invention") is applied, and includes: the pretreatment device is used for treating sulfur dioxide in the biogas; an absorption membrane contactor for receiving a supply of an absorbent from an absorbent tank and reacting the absorbent with the biogas flowing from the pretreatment apparatus to discharge the absorbent having absorbed carbon dioxide and pure methane to a methane storage tank; and a stripping membrane contactor that receives a supply of the absorbent after absorbing the carbon dioxide from the absorbing membrane contactor, separates the carbon dioxide from the absorbent, and discharges the carbon dioxide into the carbon dioxide storage tank, and discharges the absorbent after separating the carbon dioxide into the absorbent tank.
As an example, it is characterized in that: the pretreatment device includes: the moisture removal device is used for removing moisture in the biogas for the 1 st time; the gas desulfurization device is used for treating sulfur dioxide in the marsh gas flowing in from the moisture removal device; and a dehumidifier for removing moisture from the biogas flowing from the gas desulfurization apparatus for the 2 nd time.
As an example, it is characterized in that: at the rear end of the membrane contactor for absorption, comprising: and a stripping tank for discharging the gasified carbon dioxide into the carbon dioxide storage tank and discharging the stored carbon dioxide-absorbed absorbent into the stripping membrane contactor while receiving and storing the supply of the carbon dioxide-absorbed absorbent from the absorbing membrane contactor.
As an example, it is characterized in that: the moisture removing device includes: an outer pipe provided in the biogas inflow pipe and having a flow space formed therein; an inner pipe forming a flow space inside the outer pipe; a plurality of support tubes provided at front and rear ends of the outer tube and the inner tube, and communicating the outer tube and the inner tube with each other while supporting the inner tube so as to be positioned inside the outer tube; a plurality of strikers projecting from an inner peripheral edge of the outer tube in the direction of the inner tube; and a heat transfer medium filled in the outer tube and the inner tube.
As an example, it is characterized in that: the moisture removing device is configured to form an upward inclination on the biogas inflow pipe.
As an example, it is characterized in that: the front end portion of the inner tube is provided with a guide portion communicating with the inner tube and having a shape in which a diameter thereof gradually narrows toward the front.
Furthermore, the system of the present invention may be implemented by a single module.
As described above, the system to which the present invention is applied can separate high-purity methane from biogas, store carbon dioxide generated during the regeneration of the absorbent, and then use the methane as a separate use, has excellent environmental protection performance, can remove moisture and desulfurize the biogas in the system, and has the advantage of ensuring high efficiency of system operation.
Drawings
FIG. 1 is a block diagram of the system of the present invention.
Fig. 2 is a schematic diagram illustrating an example of an engineering drawing implementing a system to which the present invention is applicable.
Fig. 3 is an operation state diagram illustrating a moisture removing device which is one configuration of the present invention.
Fig. 4 is a general view of the moisture removing device in fig. 3.
Detailed Description
Next, preferred embodiments to which the present invention is applied will be described in detail.
As shown in fig. 1 and 2, a system 1 to which the present invention is applied is characterized by including: the pretreatment devices 2, 3 and 4 are used for treating sulfur dioxide in the biogas; an absorption membrane contactor 5 which receives a supply of an absorbent from an absorbent tank 10, reacts the absorbent with the biogas flowing in from the pretreatment apparatuses 2, 3, 4, discharges the absorbent having absorbed carbon dioxide, and discharges pure methane to a methane storage tank 9; and a stripping membrane contactor 7 which receives the supply of the absorbent after absorbing carbon dioxide from the absorbing membrane contactor 5 and discharges the absorbent after separating carbon dioxide into the absorbent tank 10 while separating carbon dioxide from the absorbent and discharging the carbon dioxide into the carbon dioxide storage tank 8.
That is, the present invention can separate carbon dioxide and methane from biogas and store them separately using one system, and can reuse the absorbent used in the above process, and can multiply the efficiency of obtaining high purity methane from biogas in a post-treatment process by performing a pre-treatment process.
Although the present invention has been described with reference to fig. 1 and 2, the above-described configuration can be realized in a single module, and the present invention can be further improved in applicability by ensuring convenience of movement through miniaturization.
As shown in fig. 1 and 2, the pretreatment apparatus includes: the moisture removal device 2 is used for removing moisture in the biogas for the 1 st time; a gas desulfurization device 3 for treating sulfur dioxide in the biogas flowing from the moisture removal device 2; and a dehumidifier 4 for removing moisture from the biogas flowing from the gas desulfurization device 3 for the 2 nd time.
Since the biogas passes through the gas pipeline at a relative humidity close to 100, there is a possibility that a load on the entire system is induced due to a problem of water accumulation in the pipeline caused by a condensation phenomenon when the pipeline is cooled, and particularly, in the case where the content of water in the separated methane is high, it is necessary to perform stirring in the methane storage tank 9, not shown, and additionally, a process for removing water droplets generated together with the bubbles during the stirring process as described above, and therefore, the biogas passes through the water removal device 2 as a pretreatment in the system 1 to which the present invention is applied.
Various known techniques can be applied to the desulfurization device 3, and as an example, H is desulfurized by applying a biological desulfurization method using a sulfated microorganism2The S concentration is preferably maintained stably at 10ppm or less. Generally, in a gas using device such as a boiler or a generator, biogas is desulfurized before use, but the biological desulfurization method can store desulfurized gas and thus can be more effectiveAnd can be used flexibly.
In addition, a dehumidifier 4 for the 2 nd removal of moisture from the desulfurized biogas is provided.
By allowing the biogas from which moisture has been removed to flow into the rear-end membrane contactor 5 or the like, it is possible to prevent the load of the membrane contactor 5 or the like for absorption and thereby achieve an effect of improving the operation efficiency of the entire system such as the high-purity methane acquisition efficiency.
Further, as shown in fig. 3 and 4, the present invention describes an embodiment in which the efficiency of removing moisture from biogas at the 1 st time can be improved by a simple configuration, thereby reducing the load of the dehumidifier 4 at the rear end and thereby improving the overall efficiency of removing moisture from biogas.
As shown in fig. 3 and 4, a moisture removing device 2 to which the present embodiment is applied is characterized by including: an outer pipe 21 provided in the biogas inflow pipe and having a flow space 211 formed therein; an inner tube 22 forming a flow space 221 inside the outer tube 21; a plurality of support pipes 23 provided at front and rear ends of the outer pipe 21 and the inner pipe 22, and communicating the outer pipe 21 and the inner pipe 22 with each other while supporting the inner pipe 22 so as to be positioned inside the outer pipe 21; a plurality of strikers 25 projecting from the inner periphery of the outer tube 21 in the direction of the inner tube 22; and a heat transfer medium 26 filled in the outer tube 21 and the inner tube 22.
The outer tube 21 is formed with a flow space 211 therein, so that the heat transfer medium 26 can flow inside the outer tube 21 in a state of being filled in the flow space 211.
The inner tubes 22 are fixed inside the outer tube 21 at a predetermined distance from each other, so that the gas G can flow through a space formed by the outer peripheral edge of the inner tube 22 and the inner peripheral edge of the outer tube 21. Similarly, the inner tube 22 has a flow space 221 formed therein, so that the heat transfer medium 26 can flow through the inner tube 22 in a state filled in the flow space 221.
By adopting the above-described configuration, it is possible to pressurize the gas G by the flow path having a gradually narrowed diameter while flowing in the space formed by the outer peripheral edge of the inner tube 22 and the inner peripheral edge of the outer tube 21 and to cool the gas G by the heat transfer effect of the heat transfer medium 26, thereby condensing the moisture contained in the flowing gas G.
Further, the leading end portion (the direction in which biogas flows in) of the inner pipe 22 is provided with a guide portion 24 communicating with the inner pipe 22 and having a shape in which the diameter thereof gradually narrows toward the front, in order to guide the gas G flowing into the moisture removing device 2 through the biogas inflow pipe to a space formed by the outer peripheral edge of the inner pipe 22 and the inner peripheral edge of the outer pipe 21, and to achieve cooling by heat exchange with the heat transfer medium 26 filled in the guide portion 24 during the guide process, thereby improving the cooling efficiency.
The support pipes 23 are provided at the front and rear ends of the outer pipe 21 and the inner pipe 22, and communicate the outer pipe 21 and the inner pipe 22 with each other while supporting the inner pipe 22 in such a manner that the inner pipe 22 is positioned inside the outer pipe 21, and as shown in the drawing, the heat transfer medium flowing in through the heat transfer medium inflow pipe 261 formed in the outer pipe 21 is transferred from the outer pipe 21 to the inner pipe 22 through the support pipes 23, thereby achieving heat transfer in the entire outer pipe 21 and the inner pipe 22.
The striker 25 is configured to protrude from the inner peripheral edge of the outer tube 21 in the direction of the inner tube 22, and the gas G induced into the space formed by the outer peripheral edge of the inner tube 22 and the inner peripheral edge of the outer tube 21 by the induction portion 24 collides with the plurality of strikers 25 during the flow thereof to split the gas, and at this time, the moisture mixed into the gas is separated from the gas and condensed to form dew on the striker 25. That is, the striker 25 can easily separate moisture mixed in the gas from the gas by splitting the flowing gas, and can also function as a condensation nucleus for forming condensation of the separated gas.
That is, the moisture removal device 2 to which the present embodiment is applied can pressurize and cool the biogas flowing in by being provided in the biogas inflow line, and further improve the separation efficiency of the contained moisture by splitting the gas.
Preferably, as shown in fig. 3, the moisture removing device 2 is formed to be inclined upward in the biogas inflow pipe, so that the separated moisture condensed on the striker 25 as described above falls downward from the moisture removing device 2 and is discharged through a moisture discharge pipe (not shown).
The heat transfer medium 26 is configured to absorb heat from the flowing gas and cool the gas, and the material thereof is not particularly limited, and as shown in the drawing, the heat transfer medium is circulated through the outer tube 21, the support tube 23, and the inner tube 22 by the heat transfer medium inflow line 261 formed in the outer tube 21, and then discharged through the heat transfer medium discharge line 262 formed in the outer tube 21.
The biogas after the moisture removal and desulfurization at the front end through the above-described process flows into the absorption membrane contactor 5 at the rear end.
The absorption membrane contactor 5 is configured to receive a supply of an absorbent from an absorbent tank 10, react the absorbent with biogas flowing in from the front end, discharge the absorbent having absorbed carbon dioxide, and discharge pure methane to the methane storage tank 9.
The absorbent tank 10 is configured to fill and store the absorbent at first, and preferably, the temperature of the stored absorbent is maintained at 40 ℃ or lower. Further, although the above-mentioned absorbent may be reused by recycling, when degradation (degradation) of the absorbent occurs in the above-mentioned process, the absorbent may need to be replenished.
The membrane contactor 5 for absorption is used to increase the contact area between the absorbent and the biogas, and as shown in fig. 2, the absorbent may flow on the shell side (outer side) and the gas on the lumen side (inner side), so that the absorbent absorbs carbon dioxide from the biogas in the membrane constituting the tube through a known working mechanism, and thereby the carbon dioxide is separated from the biogas, i.e., pure methane is separated.
As a material of the tubular film, various known materials such as polypropylene (polypropylene) can be used.
The absorbent after the absorption of carbon dioxide by the absorption membrane contactor 5 is discharged to the stripping tank 6 at the rear end, and the stripping tank 6 may store the absorbent after the absorption of carbon dioxide, discharge the gasified carbon dioxide to the carbon dioxide storage tank 8 as shown in fig. 2, and discharge the stored absorbent after the absorption of carbon dioxide to the stripping membrane contactor 7 at the rear end.
Preferably, the temperature of the stripping tank 6 is preferably about 80 to 100 ℃ based on the time point when the absorbent is discharged from the stripping tank, and a part of the carbon dioxide is stripped from the absorbent in the process of temperature increase.
The peeling membrane contactor 7 receives a supply of the absorbent absorbing carbon dioxide from the peeling tank 6 and discharges the absorbent after separating carbon dioxide into the absorbent tank 10 while separating carbon dioxide from the absorbent and discharging the carbon dioxide into the carbon dioxide storage tank 8.
The membrane contactor for stripping 7 is a known configuration for regenerating the absorbent after absorbing carbon dioxide, similarly to the membrane contactor for absorption 5, and its object is to maximize the contact area between the absorbent and the atmosphere.
As shown in fig. 2, the carbon dioxide can be separated from the absorbent by means of the membrane constituting the tube body by a known operation mechanism in which the absorbent after absorbing the carbon dioxide is made to flow on the inner chamber side (inside of the tube body) and the air is made to flow on the outer shell side (outside of the tube body).
Preferably, the peeling membrane contactor 7 is operated by a reduced pressure peeling method and is preferably operated at a pressure of about 0.3 to 0.5 bar.
The methane storage tank 9 is configured to store methane gas after carbon dioxide separation, and although not shown, it may be connected to a city gas supply line via a pipeline for transportation, or compressed and stored by a gas booster, for example. Naturally, in order to cope with an abnormal rise in the internal pressure or the like, it is necessary to install a safety device (e.g., a wet safety vent, a safety valve, etc.) in the methane storage tank 9. In order to use the gas, it is necessary to install a device (KS standard or equivalent) capable of automatically adjusting the gas pressure to a predetermined pressure or lower in the methane storage tank 9.
The carbon dioxide storage tank 8 may store carbon dioxide stripped after the absorbent regeneration, rather than discharging the carbon dioxide to the outside, and may be reused for various purposes, although not shown.
The present invention is described in detail with reference to the embodiments and the drawings, which are limited to the above-described embodiments, but the present invention is not limited to the above-described embodiments, and various modifications and variations can be made by those having ordinary knowledge in the art to which the present invention pertains based on the above-described descriptions.
Claims (7)
1. A high-quality methane system is characterized by comprising:
the pretreatment device is used for treating sulfur dioxide in the biogas;
an absorption membrane contactor for receiving a supply of an absorbent from an absorbent tank and reacting the absorbent with the biogas flowing from the pretreatment apparatus to discharge the absorbent having absorbed carbon dioxide and pure methane to a methane storage tank; and the number of the first and second groups,
and a membrane contactor for stripping, which receives the supply of the absorbent after absorbing the carbon dioxide from the membrane contactor for absorption, separates the carbon dioxide from the absorbent and discharges the carbon dioxide into a carbon dioxide storage tank, and simultaneously discharges the absorbent after separating the carbon dioxide into the absorbent tank.
2. The system for improving the quality of biogas according to claim 1, wherein:
the pretreatment device includes:
the moisture removal device is used for removing moisture in the biogas for the 1 st time; the gas desulfurization device is used for treating sulfur dioxide in the marsh gas flowing in from the moisture removal device; and a dehumidifier for removing moisture from the biogas flowing from the gas desulfurization apparatus for the 2 nd time.
3. The system for improving the quality of biogas according to claim 1, wherein:
at the rear end of the membrane contactor for absorption, comprising: and a stripping tank for receiving and storing the supply of the absorbent after absorbing the carbon dioxide from the membrane contactor for absorption, discharging the gasified carbon dioxide to the carbon dioxide storage tank, and discharging the stored absorbent after absorbing the carbon dioxide to the membrane contactor for stripping.
4. The system for improving the quality of biogas according to claim 2, wherein:
the moisture removing device includes: an outer pipe provided in the biogas inflow pipe and having a flow space formed therein; an inner pipe forming a flow space inside the outer pipe; a plurality of support tubes provided at front and rear ends of the outer tube and the inner tube, and communicating the outer tube and the inner tube from inside while supporting the inner tube so as to be positioned inside the outer tube; a plurality of strikers projecting from an inner peripheral edge of the outer tube in the direction of the inner tube; and a heat transfer medium filled in the outer tube and the inner tube.
5. The system for improving the quality of biogas according to claim 4, wherein:
the moisture removing device is configured to form an upward inclination on the biogas inflow pipe.
6. The system for improving the quality of biogas according to claim 4, wherein:
the front end portion of the inner tube is provided with a guide portion communicating with the inner tube and having a shape in which a diameter thereof gradually narrows toward the front.
7. A high-quality methane system is characterized in that:
the biogas high-quality system according to any one of claims 1 to 6 is realized by a single module.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020180075481A KR102101368B1 (en) | 2018-06-29 | 2018-06-29 | Biogas upgrading system |
| KR10-2018-0075481 | 2018-06-29 | ||
| PCT/KR2018/007807 WO2020004699A1 (en) | 2018-06-29 | 2018-07-10 | Biogas upgrading system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112399881A true CN112399881A (en) | 2021-02-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201880095088.6A Pending CN112399881A (en) | 2018-06-29 | 2018-07-10 | Biogas high quality system |
Country Status (3)
| Country | Link |
|---|---|
| KR (1) | KR102101368B1 (en) |
| CN (1) | CN112399881A (en) |
| WO (1) | WO2020004699A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR102856351B1 (en) | 2019-12-31 | 2025-09-04 | 삼성전자주식회사 | Holographic microscope and manufacturing method of semiconductor device using the same |
| CN114591769B (en) * | 2020-12-04 | 2023-11-10 | 中国石油化工股份有限公司 | Membrane system structure for removing hydrogen sulfide from natural gas |
| KR102467476B1 (en) | 2021-12-15 | 2022-11-17 | 주식회사 성진엠텍 | Biogas purification-upgrading and utilization system |
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| KR100908094B1 (en) * | 2007-12-21 | 2009-07-16 | 주식회사 포스코 | Apparatus and method for separating water in gas containing moisture |
| KR101327338B1 (en) * | 2013-05-24 | 2013-11-11 | 주식회사 삼천리이에스 | A system and method thereof for production of biomethane and recovery of carbon dioxide |
| KR101862769B1 (en) | 2016-02-19 | 2018-05-31 | 한국화학연구원 | High purity methane gas purification apparatus and method from the biogas |
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2018
- 2018-06-29 KR KR1020180075481A patent/KR102101368B1/en active Active
- 2018-07-10 CN CN201880095088.6A patent/CN112399881A/en active Pending
- 2018-07-10 WO PCT/KR2018/007807 patent/WO2020004699A1/en not_active Ceased
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| US3429057A (en) * | 1966-12-05 | 1969-02-25 | Proctor & Schwartz Inc | Dryers |
| JP2002079038A (en) * | 2000-09-06 | 2002-03-19 | Matsushita Seiko Co Ltd | Dehumidification element |
| CN1518473A (en) * | 2001-04-23 | 2004-08-04 | ���ڵٿ�����˾ | Surfaces used to facilitate droplet formation |
| CN103079682A (en) * | 2010-07-15 | 2013-05-01 | 夸德罗吉动力系统公司 | Integrated biogas cleaning system for removal of water, siloxanes, sulfur, oxygen, chlorides and VOCs |
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| CN204656305U (en) * | 2015-04-13 | 2015-09-23 | 天紫环保投资控股有限公司 | Stalk produces biogas purification devices |
| CN106802031A (en) * | 2015-11-26 | 2017-06-06 | 四川捷元科技有限公司 | Absorption refrigeration unit inclined-plane water conservancy diversion condenser |
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Also Published As
| Publication number | Publication date |
|---|---|
| KR20200002222A (en) | 2020-01-08 |
| KR102101368B1 (en) | 2020-05-29 |
| WO2020004699A1 (en) | 2020-01-02 |
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