CN210481314U - Landfill gas purification natural gas process device based on membrane method - Google Patents
Landfill gas purification natural gas process device based on membrane method Download PDFInfo
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- CN210481314U CN210481314U CN201921147208.0U CN201921147208U CN210481314U CN 210481314 U CN210481314 U CN 210481314U CN 201921147208 U CN201921147208 U CN 201921147208U CN 210481314 U CN210481314 U CN 210481314U
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
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Abstract
The utility model discloses a landfill gas purification natural gas process units based on embrane method, including roots's fan, pretreatment systems, desulfurizing tower, compression equipment, deoxidation tower, separation membrane group and CNG compressor, roots's air inlet end and landfill gas exit linkage, roots's fan's the end of giving vent to anger is connected with pretreatment systems's input, pretreatment systems's output and desulfurizing tower's input are connected, desulfurizing tower's output and compression equipment's input are connected, and this landfill gas purification natural gas process units based on embrane method, the landfill gas of collecting in the landfill yard, through the H of landfill gas pretreatment systems in with the landfill gas2S、H2Removing O, pressurizing to 0.5 MPa.G by a landfill gas compressor, and performing catalytic deoxidation to remove O in the landfill gas2Removing, purifying the landfill gas to compressed natural gas for vehicles by a separation membrane group process, and finally pressurizing to 20MPa G by a CNG compressor and directly filling the CNG into a CNG transport tube bundle vehicle by a gas filling column.
Description
Technical Field
The utility model relates to a landfill gas processing technology field specifically is a landfill gas purification natural gas process units based on embrane method.
Background
At present, petroleum and natural gas resources in China are deficient, and the external dependence is high; the biomass resource is quite abundant, but the development and utilization are lagged. The national energy agency sets a medium-term development plan of the biogas, and the annual yield of the biogas is about 400 billionths of cubic meters in 2030 years. The national 'biological energy' thirteen-five 'planning' puts 'the vigorous development of the biological natural gas' at the head of 'development layout and construction key' four biological energy varieties; the yield index in 2020 is specified to be 80 billionths of cubic meters.
Landfill gas produced by the refuse landfill has high yield, and the released landfill gas can cause serious harm to the environment and human beings. Wherein the methane gas in the landfill gas accounts for 50 percent, and the methane gas is a precious clean energy source and has higher utilization value. At present, landfill gas is treated by adopting a torch combustion mode, but the treatment does not really achieve the aim of reducing environmental pollution and causes serious resource waste. Therefore, a landfill gas purified natural gas process device based on a membrane method is provided.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a landfill gas purification natural gas process units based on embrane method to solve the problem that proposes among the above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme: a landfill gas purifying natural gas process device based on a membrane method comprises a Roots blower, a pretreatment system, a desulfurizing tower, a compression device, a deoxygenation tower, a separation membrane group and a CNG compressor, wherein an air inlet end of the Roots blower is connected with a landfill gas outlet, an air outlet end of the Roots blower is connected with an input end of the pretreatment system, an output end of the pretreatment system is connected with an input end of the desulfurizing tower, an output end of the desulfurizing tower is connected with an input end of the compression device, an output end of the compression device is connected with an input end of the deoxygenation tower, an output end of the deoxygenation tower is connected with an input end of the separation membrane group, and an output end of the separation membrane group is connected with an input end of the CNG compressor.
Preferably, the pretreatment system comprises a heat exchanger, a gas-liquid separator and a precision filter, wherein the input end of the heat exchanger is connected with the output end of the Roots blower, the output end of the heat exchanger is connected with the input end of the gas-liquid separator, and the output end of the gas-liquid separator is connected with the input end of the precision filter.
Preferably, a coarse filter is arranged at the joint of the heat exchanger and the Roots blower.
Preferably, the desulfurization tower is a dry desulfurization tower.
Preferably, the compression equipment is a skid-mounted oil injection screw compressor.
1. Compared with the prior art, the beneficial effects of the utility model are that: the landfill gas collected from the refuse landfill is treated by a landfill gas pretreatment system to remove H in the landfill gas2S、H2Removing O, pressurizing to 0.5 MPa.G by a landfill gas compressor, and performing catalytic deoxidation to remove O in the landfill gas2Removing, purifying the landfill gas to compressed natural gas for vehicles by a separation membrane group process, and finally pressurizing to 20MPa G by a CNG compressor and directly filling the CNG into a CNG transport tube bundle vehicle by a gas filling column.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention.
In the figure: 1. a Roots blower; 2. a pre-treatment system; 3. a desulfurizing tower; 4. a compression device; 5. a deoxygenation tower; 6. separating the membrane group; 7. a CNG compressor; 8. a heat exchanger; 9. a gas-liquid separator; 10. a precision filter.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, the present invention provides a technical solution: a landfill gas purifying natural gas process device based on a membrane method comprises a Roots blower 1, a pretreatment system 2, a desulfurizing tower 3, a compression device 4, a deoxygenation tower 5, a separation membrane group 6 and a CNG compressor 7, wherein the air inlet end of the Roots blower 1 is connected with a landfill gas outlet, the air outlet end of the Roots blower 1 is connected with the input end of the pretreatment system 2, the pretreatment system 2 is used for realizing the processing functions of pressurization, pressure stabilization, temperature regulation, impurity removal, dehydration, safety protection and the like of landfill gas, and is also a fuel gas conveying bridge between a landfill gas collection system and a purification system, the output end of the pretreatment system 2 is connected with the input end of the desulfurizing tower 3, two desulfurizing towers are arranged, the two towers can be connected in parallel or in series, the output end of the desulfurizing tower 3 is connected with the input end of the compression device 4, the compression device 4 adopts an oil injection screw compressor, the design outlet pressure is 0.6MPa, the exhaust gas volume is 2250Nm3/h, the outlet temperature is 40 ℃, the output end of the compression device 4 is connected with the input end of the deoxygenation tower 5, and O in the landfill gas is enabled to be connected under the action of the catalyst2And CH4、H2Or methanol (ethanol) and other gases are removed by reaction, the raw material gas enters a pre-deoxidation waste heat recovery system after being compressed and discharged from a desulfurization tower, the raw material gas can be preheated to reach the fine desulfurization working temperature and the activation temperature of a deoxidation catalyst, the temperature of the deoxidized gas is reduced, a reaction heat source is effectively utilized, the energy consumption of a device is reduced, the safety of the device is improved, the air inflow is proportioned according to the reaction temperature, the catalytic combustion reaction is maintained at a lower temperature, and O can be ensured2Effective combustionBurning and removing, ensuring the device to run under the safe and stable working condition, finally ensuring the gas temperature to be higher after passing through a waste heat recovery system, adopting a dual mode of air cooling water and water cooling to ensure the gas temperature according to the weather temperature condition of a project, not only reducing the temperature of the gas, but also effectively utilizing the natural environment to reduce the energy consumption of the device, connecting the output end of the deoxidation tower 5 with the input end of the separation membrane group 6, and separating CO by permeation2And the separation is carried out, so that the purity is improved, the output end of the separation membrane group 6 is connected with the input end of the CNG compressor 7, and the compressed CNG is directly filled into the CNG transport tube bundle vehicle through the gas filling column.
The pretreatment system 2 includes a heat exchanger 8, the system comprises a gas-liquid separator 9 and a precision filter 10, wherein the input end of a heat exchanger 8 is connected with the output end of a Roots blower 1, the output end of the heat exchanger 8 is connected with the input end of the gas-liquid separator 9, the output end of the gas-liquid separator 9 is connected with the input end of the precision filter 10, landfill gas (LFG) is pumped by the Roots blower 1 and enters a pretreatment system 2, the pretreatment system 2 is provided with a cooling, dewatering and dust removing device, a coarse filter is arranged at the inlet of the pretreatment system 2 to filter large-particle magazines and partial liquid water in the LFG, a heat exchanger 8 is arranged to reduce the temperature of feed gas to be within 20 ℃, saturated moisture in raw gas is separated out in a free state and then effectively removed by the gas-liquid separator, the dewatering rate of the gas-liquid separator 9 reaches more than 97%, and the outlet of the pretreatment system 2 is.
The joint of the heat exchanger 8 and the Roots blower 1 is provided with a coarse filter for filtering large-particle magazines.
The desulfurizing tower 3 is a dry desulfurizing tower, a dry desulfurizing process is adopted for desulfurization, and a solid ferric oxide is adopted as a desulfurizing agent, so that the utilization efficiency of the desulfurizing agent is improved.
The compression equipment 4 is a skid-mounted oil injection screw compressor, the compression equipment 4 adopts the skid-mounted oil injection screw compressor, the process gas pressure and the flow are stable, and meanwhile, the outlet gas circuit is provided with cooling equipment for adjusting the gas temperature.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The utility model provides a landfill gas purification natural gas process units based on embrane method, includes roots's fan (1), pretreatment system (2), desulfurizing tower (3), compression equipment (4), deoxidation tower (5), separation membrane group (6) and CNG compressor (7), its characterized in that: the inlet end of the Roots blower (1) is connected with a landfill gas outlet, the outlet end of the Roots blower (1) is connected with the input end of the pretreatment system (2), the output end of the pretreatment system (2) is connected with the input end of the desulfurizing tower (3), the output end of the desulfurizing tower (3) is connected with the input end of the compression device (4), the output end of the compression device (4) is connected with the input end of the deoxidizing tower (5), the output end of the deoxidizing tower (5) is connected with the input end of the separation membrane group (6), and the output end of the separation membrane group (6) is connected with the input end of the CNG compressor (7).
2. The process unit for purifying natural gas by landfill gas based on the membrane method as claimed in claim 1, wherein: the pretreatment system (2) comprises a heat exchanger (8), a gas-liquid separator (9) and a precision filter (10), wherein the input end of the heat exchanger (8) is connected with the output end of the Roots blower (1), the output end of the heat exchanger (8) is connected with the input end of the gas-liquid separator (9), and the output end of the gas-liquid separator (9) is connected with the input end of the precision filter (10).
3. The process unit for purifying natural gas by landfill gas based on the membrane method as claimed in claim 2, wherein: and a coarse filter is arranged at the joint of the heat exchanger (8) and the Roots blower (1).
4. The process unit for purifying natural gas by landfill gas based on the membrane method as claimed in claim 1, wherein: the desulfurizing tower (3) is a dry desulfurizing tower.
5. The process unit for purifying natural gas by landfill gas based on the membrane method as claimed in claim 1, wherein: the compression equipment (4) is a skid-mounted oil injection screw compressor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921147208.0U CN210481314U (en) | 2019-07-22 | 2019-07-22 | Landfill gas purification natural gas process device based on membrane method |
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| CN201921147208.0U CN210481314U (en) | 2019-07-22 | 2019-07-22 | Landfill gas purification natural gas process device based on membrane method |
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| CN210481314U true CN210481314U (en) | 2020-05-08 |
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| CN201921147208.0U Active CN210481314U (en) | 2019-07-22 | 2019-07-22 | Landfill gas purification natural gas process device based on membrane method |
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