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CN-121977164-A - Distributed gas phase storage and distribution system for capturing carbon dioxide in flue gas

CN121977164ACN 121977164 ACN121977164 ACN 121977164ACN-121977164-A

Abstract

The invention belongs to the technical field of carbon storage and distribution, and particularly discloses a gas phase storage and distribution system for capturing carbon dioxide by distributed flue gas. The system is characterized in that a trapping pressurizing station is connected with industrial flue gas and is connected with a conveying primary pipe network, a pipeline safety valve and a pipeline drainage device are arranged on the system, a conveying secondary pipe mesh is arranged in a planting area and is connected with an area gate station and a parallel pressure-regulating air-supplementing station connected with a pipeline between the conveying primary pipe networks in series, a pressure-reducing detection metering station is communicated with an inlet end of a planting user and the conveying secondary pipe mesh, a safety relief valve is respectively arranged at a flue gas carbon dioxide trapping pressurizing station, a pressure-regulating air-supplementing station, an area gate station and an inlet end of the planting user, a normal pressure storage pressurizing station is arranged on the conveying primary pipe network, and an air pressure station is respectively communicated with the trapping pressurizing station, the conveying primary pipe network, the pressure-regulating air-supplementing station, the area gate station, the conveying secondary pipe mesh, the pressure-reducing detection metering station, the normal pressure storage and pressurization station and all the safety relief valves. The invention has the characteristics of simple structure, stable flow, low cost and easy control.

Inventors

  • HUA ZHIYU
  • LIU ZUOWEN
  • ZHANG YULIN
  • LI FASHE
  • YANG KUN
  • SUI MENG
  • LI ZHUOYUAN
  • WANG SHUANG
  • LU HUA
  • TAN FANGGUAN
  • ZHU JIE

Assignees

  • 昆明有色冶金设计研究院股份公司
  • 昆明理工大学

Dates

Publication Date
20260505
Application Date
20260316

Claims (10)

  1. 1. The gas phase storage and distribution system for capturing carbon dioxide by distributed flue gas is characterized by comprising a carbon dioxide capturing and pressurizing station (1), a conveying primary pipe network (2), a pipeline safety valve (3), a pipeline drainage device (4), a pressure-regulating and air-supplementing station (5), a regional gate station (6), a conveying secondary pipe network (7), a pressure-reducing detection metering station (8), a safety relief valve (9), an air compression station (10) and a normal pressure storage and distribution pressurizing station (11); The carbon dioxide trapping pressurizing stations (1) are provided with a plurality of seats and are respectively connected with industrial flue gas output channels of enterprises in jurisdictions, carbon dioxide output ports of the carbon dioxide trapping pressurizing stations (1) are respectively connected with each other through a conveying primary pipe network (2), pipeline safety valves (3) and pipeline drainage devices (4) are respectively arranged on the conveying primary pipe network (2) which is correspondingly connected with the carbon dioxide output ports of the flue gas carbon dioxide trapping pressurizing stations (1), the conveying secondary pipe networks (7) are respectively and independently arranged in various planting areas and planting industry gardens, regional gate stations (6) are connected on pipelines connected with the conveying primary pipe network (2) and the conveying secondary pipe networks (7) in series, pressure regulating and air supplementing stations (5) are connected on the pipelines connected with the conveying primary pipe networks (2) and the conveying secondary pipe networks (7) in parallel in areas with large carbon dioxide fertilizer consumption, pressure reducing detection metering stations (8) are respectively arranged at carbon dioxide inlet ends of various planting users and are communicated with the conveying secondary pipe networks (7), safety release valves (9) are respectively arranged at the carbon dioxide trapping pressurizing stations (1), the pressure regulating gate stations (6), the pressure regulating gate stations (5) and the at least two pressure regulating stations (11) are arranged at the two pressure regulating stations and the conveying primary pipe network (11), one side of carrying one-level pipe network (2) and carrying diode network (7) is provided with many air compressor stations (10) respectively, the high-pressure export of air compressor station (10) is through pipeline and carbon dioxide entrapment pressurization station (1) nearby respectively, carry one-level pipe network (2), pressure regulating air supplementing station (5), regional door station (6), carry diode network (7), decompression detects metering station (8), normal pressure store up and join in marriage pressurization station (11) and each safety relief valve's (9) compressed air inlet intercommunication.
  2. 2. The gas phase storage and distribution system for capturing carbon dioxide by distributed flue gas according to claim 1 is characterized in that a conveying diode network (7) in each large planting area or planting industry park is communicated with a conveying primary pipe network (2) through at least two pipelines to form loop gas supply, each pipeline is connected with a regional gate station (6) in series, and the normal pressure storage and distribution pressurizing station (11), the conveying primary pipe network (2) and the conveying diode network (7) are provided with a plurality of pipeline drainage devices (4) in a segmented mode according to conveying conditions.
  3. 3. The distributed flue gas carbon dioxide capturing gas phase storage and distribution system according to claim 1, wherein the normal pressure storage and distribution pressurizing station (11) is provided with at least two air outlets, at least one air outlet is communicated with the first-stage conveying pipe network (2) through a pressurizing fan I (50), at least one other air outlet of the normal pressure storage and distribution pressurizing station (11) is communicated with external equipment through a pressurizing fan II (51), and a pressure reducing valve I (52) is further connected in series on a pipeline, communicated with the first-stage conveying pipe network (2), of an air inlet of the normal pressure storage and distribution pressurizing station (11).
  4. 4. The distributed flue gas carbon dioxide capturing and distributing system according to claim 1, wherein the working pressure of the first-stage pipe network (2) is 0.3-0.8 MPa, the working pressure of the second-stage pipe network (7) is 0.2-0.3 MPa, the input pressure of the air compression station (10) is 0.1-0.3 MPa, and the carbon dioxide capturing and pressurizing station (1) adopts a physical absorption method, a membrane capturing method or a PSA pressure swing adsorption method.
  5. 5. The system for collecting and distributing carbon dioxide by using the distributed flue gas according to claim 1,2, 3 or 4, wherein each carbon dioxide collecting and pressurizing station (1), each valve of the primary pipe network (2), the pressure-regulating and air-supplementing station (5), the regional gate station (6), each valve of the secondary pipe network (7) and the normal pressure collecting and pressurizing station (11) are respectively and electrically connected with a DCS automatic control system (12), and the pressure-reducing detection metering station (8) is electrically connected with a corresponding user PLC control system (13).
  6. 6. The distributed flue gas carbon dioxide capturing gas phase storage and distribution system according to claim 5, wherein the carbon dioxide capturing pressurization station (1) comprises a flue gas flow regulating valve (14), a flue gas inlet cut-off valve (15), a flue gas induced draft fan inlet valve (16), a flue gas induced draft fan (17), a flue gas induced draft fan outlet valve (18), a flue gas dust removal cooling device (19), a condensate water drainer (20), a carbon dioxide capturing device (21), a carbon dioxide dehydration device (22), a pressurization fan inlet valve (23), a pressurization fan (24), a pressurization fan outlet valve (25) and a flue gas exhaust gas discharge valve (26); The flue gas flow regulating valve (14) is arranged on an industrial flue gas outer discharge flue corresponding to the carbon dioxide collecting and pressurizing station (1) in series, the flue gas inlet cut-off valve (15) is arranged on the industrial flue gas flue connected with the carbon dioxide collecting and pressurizing station (1) at the front end of the flue gas flow regulating valve (14), the outlet end of the flue gas inlet cut-off valve (15) is communicated with the inlet end of the flue gas induced draft fan (17) through a pipeline and is connected with the flue gas induced draft fan inlet valve (16) in series on the pipeline, the outlet end of the flue gas induced draft fan (17) is communicated with the inlet end of the flue gas dust removal cooling device (19) through the pipeline and is connected with the flue gas induced draft fan outlet valve (18) in series on the pipeline, the flue gas dust removal cooling device (19), the carbon dioxide collecting device (21) and the carbon dioxide dewatering device (22) are sequentially communicated with each other through the pipeline head and tail, the inlet end of the booster fan inlet valve (23) is communicated with the outlet end of the carbon dioxide dewatering device (22) through the pipeline, the booster fan inlet valve (23), the booster fan (24) and the booster fan outlet valve (25) are sequentially communicated with the outlet end of the primary pipe network (2), the exhaust gas outlet end of the carbon dioxide trapping device (21) is communicated with an industrial exhaust gas outlet flue at the rear end of the exhaust gas flow regulating valve (14) through a pipeline, and an exhaust gas exhaust valve (26) is connected in series on the pipeline.
  7. 7. The distributed flue gas carbon dioxide capturing gas phase storage and distribution system according to claim 5, wherein the pressure regulating and air supplementing station (5) comprises an inlet pressure sensor (27), an inlet regulating valve (28), a pressurizer II (29), a pressurizer outlet regulating valve (30), a gas storage tank (31), an outlet pressure sensor (33), an air supplementing station outlet cut-off valve (34) and a pressure reducing valve II (35), an inlet end of the inlet pressure sensor (27) and an outlet end of the pressure reducing valve II (35) are respectively communicated with a conveying primary pipe network (2) through pipelines, the inlet pressure sensor (27), the inlet regulating valve (28), the pressurizer II (29), the pressurizer outlet regulating valve (30), the gas storage tank (31) and the pressure reducing valve II (35) are sequentially connected end to end through pipelines, air supplementing station outlet cut-off valves (34) are respectively connected in series on the pipelines at the front end and the rear end of the pressure reducing valve II (35), and the gas storage tank (31) is connected with a safety release valve (9).
  8. 8. The distributed flue gas carbon dioxide capturing gas phase storage and distribution system according to claim 5, wherein the regional gate station (6) comprises a shut-off valve I (36), a pressure sensor I (37), a pressure reducing valve III (38), a carbon dioxide content detector I (39) and a flowmeter I (40), the pressure sensor I (37), the pressure reducing valve III (38), the carbon dioxide content detector I (39) and the flowmeter I (40) are sequentially connected end to end, the shut-off valve I (36) is respectively connected in series on a pipeline connected with the input end of the pressure sensor I (37) and the output end of the flowmeter I (40), the input end of the shut-off valve I (36) at the front end of the pressure sensor I (37) is communicated with the conveying primary pipe network (2) through a pipeline, and the output end of the shut-off valve I (36) at the rear end of the flowmeter I (40) is communicated with the conveying secondary pipe network (7) through a pipeline.
  9. 9. The distributed flue gas carbon dioxide capturing gas phase storage and distribution system according to claim 8, wherein the regional gate station (6) is provided with two or three bypasses which are sequentially connected end to end by a shut-off valve I (36), a pressure sensor I (37), a pressure reducing valve III (38), a carbon dioxide content detector I (39), a flowmeter I (40) and the shut-off valve I (36), the input end of the head end shut-off valve I (36) of each bypass is communicated with the primary pipeline network (2) through a pipeline, the output ends of the tail end shut-off valves I (36) of each bypass are communicated with each other and are communicated with the secondary pipeline network (7) through a pipeline, and a safety relief valve (9) is arranged on the pipeline, wherein the output ends of the tail end shut-off valves I (36) of each bypass are communicated with each other.
  10. 10. The distributed flue gas carbon dioxide capturing gas phase storage and distribution system according to claim 5, wherein the pressure reduction detection metering station (8) comprises a shut-off valve II (42), a pressure reduction valve IV (43), a pressure sensor II (44), a carbon dioxide content detector II (45), a flow meter II (46) and a pressure reduction detection metering station bypass (48), the pressure reduction valve IV (43) and the flow meter II (46) are connected end to end through pipelines, the pressure sensor II (44) and the carbon dioxide content detector II (45) are respectively connected on the pipelines, a shut-off valve II (42) is respectively connected on the pipeline connected with the input end of the pressure reduction valve IV (43) and the output end of the flow meter II (46), the input end of the shut-off valve II (42) at the front end of the pressure reduction valve IV (43) is communicated with a delivery secondary pipeline network (7) through the pipeline, the output end of the shut-off valve II (42) at the rear end of the flow meter II (46) is communicated with the carbon dioxide inlet end of a corresponding planting user, the shut-off valve II (42), the pressure reduction valve IV (43), the pressure reduction valve II (44), the pressure sensor II (44), the carbon dioxide content detector II (45) and the shut-off valve II (46) are respectively connected with the safety valve II (42) in turn, and a safety relief valve (9) is respectively connected to a pipeline connected with the rear end cut-off valve II (42) at the output end of the flowmeter II (46) and a pipeline connected with the rear end cut-off valve II (42) at the bypass (48) of the decompression detection metering station.

Description

Distributed gas phase storage and distribution system for capturing carbon dioxide in flue gas Technical Field The invention belongs to the technical field of carbon storage and preparation, and particularly relates to a distributed gas phase storage and preparation system for capturing carbon dioxide in flue gas, which has the advantages of simple structure, stable flow, low cost and easiness in control. Background With the deep advancement of the global 'double carbon' strategy, the CO 2 emission reduction of industrial flue gas and the cooperative development of agricultural resource utilization become important directions. In industrial flue gas discharged by industries such as steel, chemical industry, electric power and the like, the volume fraction of CO 2 is usually 10% -30%, if the direct discharge causes a greenhouse effect, precious carbon resources are wasted, and in a facility agriculture and large-scale planting industrial park, the concentration of CO 2 is a key factor for restricting the photosynthesis efficiency of crops. For example, in a cold period, due to limited ventilation, the concentration of CO 2 is insufficient, and the growth of crops must depend on CO 2 to realize photosynthesis, so that the yield and quality of vegetables, fruits and fresh flowers are severely limited. According to research, CO 2 trapped in industrial flue gas is purified and then used as a gas fertilizer, so that the yield of crops can be increased by 30% -100%, and meanwhile, the industrial emission reduction cost is reduced, and an environment-friendly and agricultural win-win industrial mode is formed. At present, the addition of CO 2 gas fertilizer mainly comprises a combustion method, a chemical method, a dry ice method, a bottled carbon dioxide method and the like, but most of the methods are difficult to produce, high in transportation and purchasing cost and troublesome to use, so that the method is not popularized and used in a large area. There are also a small number of fresh flower greenhouse planting, using low temperature liquefied CO 2 storage tank to apply CO 2 gas fertilizer, but liquefied CO 2 has high cost, and cryogenic gas production unit yield is low, and the low temperature liquefied storage tank is a pressure vessel, so that the operation requirement is high, resulting in extremely high comprehensive cost of gas fertilizer application. The CO 2 automatic fire extinguishing system is widely applied to important places such as computer rooms, libraries, archives, communication rooms, museums, hangars and oil houses due to the advantages of high fire extinguishing speed, high efficiency, no pollution, low toxicity and the like, but is limited by the factors such as acquisition, transportation and storage, and most of the CO 2 (such as bottled CO 2 fire extinguishers) is currently used, so that personnel are not easy to operate and frostbite at low temperature when in use, and the CO 2 gas cylinder area becomes an explosion hazard source if a fire disaster occurs. In the prior art, in order to solve the defects of CO 2 gas phase acquisition and storage and distribution, the method is a feasible method for capturing industrial flue gas in the industries of steel, chemical industry, electric power and the like nearby, and can effectively solve the defects of difficult production and high cost. The method mainly adopts tank truck transportation and pipe network transportation after trapping, but the tank truck transportation has the defects of high cost and poor continuity, is only suitable for small-scale planting areas, has large-scale advantages, such as adopting a technical scheme of single-stage high-pressure pipe network (0.8-1.2 MPa) transportation, and meeting the requirement of long-distance transportation, but the agricultural user end needs to decompress for many times, so that pressure loss and energy consumption are wasted, a pipeline drainage device and a sectional safety relief valve are not arranged, condensed water is easy to freeze and block a pipeline in a low-temperature environment, no emergency relief channel is arranged in overpressure, and a technical scheme of secondary low-pressure pipe network (0.1-0.2 MPa) transportation is adopted, but the 'trapping-transportation-utilization' closed loop cannot be realized due to the fact that the pipe network is connected only through a single-area gate station, and multi-node loop gas supply is not formed, so that if a certain section of pipeline fails, the gas consumption of the whole planting area is interrupted, and the reliability of the system is insufficient. In addition, the existing CO 2 gas-phase capturing and pipe network conveying have the following problems: 1. the pressure mismatch between multi-source trapping and pipe network conveying is caused by lack of a pretreatment module and linkage control, so that the conveying efficiency of CO 2 is low and the pipe network is easy to block. 2. The design of the pressure