| Customization: | Available |
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| Certification: | CE, ISO |
| Installation Method: |
Horizontal |
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What is shipborne carbon capture system?
Carbon dioxide (CO2) capture, utilization and storage (CCUS) refers to the process of separating CO2 from industrial processes, energy use or the atmosphere and permanently reducing CO2 emissions, mainly including CO2 capture, transport, utilization and storage. As a strategic technology that is expected to realize large-scale low-carbon utilization of fossil energy, CCUS can significantly reduce greenhouse gas emissions during the whole life cycle of traditional fossil energy and realize the negative carbon emission potential of green energy, and is an important means to reduce CO2 emissions, ensure energy security, build ecological civilization and achieve sustainable development in the future.
CO2 capture refers to the process of separating CO2 from industrial production, energy use or the atmosphere, which is mainly divided into three ways: pre-combustion capture, oxygen-rich combustion and post-combustion capture. Pre-combustion capture refers to converting carbon-containing fossil fuels into a mixture dominated by CO and H2 through gasification and reforming processes before combustion, and then converting CO into CO2 through a conversion reaction. After the conversion reaction, the concentration of CO2 is improved, and then the enriched CO2 is separated and captured through the corresponding separation technology. Oxygen-rich combustion refers to the use of oxygen instead of air as an oxidizer, together with fuel in the oxygen-rich combustion furnace combustion, combustion of the gas mixture mainly CO2 and H2O, and then through condensation to separate and capture CO2. Post-combustion capture technology refers to the capture of CO2 in exhaust gas, which can be directly applied to traditional power plants and other energy use scenarios.
The application of carbon capture technology on ships
Shipboard carbon capture technology based on traditional energy power system generally adopts chemical absorption method to capture carbon in the exhaust gas. The principle is to realize the absorption and release of CO2 through the temperature change of the absorption liquid, so as to achieve the separation and capture of CO2 from the exhaust gas. It mainly consists of four processes: CO2 capture, separation, compression, liquefaction and storage and unloading. First of all, the exhaust gas on board enters the absorption tower to capture CO2, and then separates the captured CO2 in the separation tower. The separated CO2 gas is compressed, liquefied and purified, and the purified and liquefied CO2 is transported to the storage container. The captured and stored liquid CO2 can be transferred directly to the CO2 carrier at the port, or unloaded at the professional port, provided to the treatment plant for alkali, alcohol and other chemical raw materials or geological, biological utilization, or can be made into dry ice and put into the seabed storage in the designated sea area.
Ship-mounted
The main equipment components of shipborne carbon capture systems usually include exhaust gas bypass valves, CO2 fans, heat exchangers, absorption units, separation units, compression units, refrigeration units, liquefaction units, storage units, gas detection and monitoring systems, wastewater treatment and control systems, etc. In fact, ship installation should pay attention to the impact on structural strength and ship stability. In particular, when the carbon capture system fails unexpectedly, its intake and exhaust pipes should be designed to avoid excessive back pressure in the Marine engine.
Layout plan
According to different ship types and their operating characteristics, and considering the capture capacity of shipboard carbon capture system, the volume of CO2 storage tank required is calculated, and different layout schemes are flexibly adopted. At the same time, special attention should be paid to the risk of CO2 leakage.
Energy optimization
Considering the relatively high energy consumption of shipboard carbon capture systems, it is urgent to break through the high-efficiency and low-energy CO2 capture and storage technology to effectively reduce system energy consumption. At the same time, the capacity of the power station on board must have sufficient redundancy, and the system can be disconnected in case of overload.
Future development trend
-Improve the system of regulations, norms and standards.
To clarify the emission reduction effect, evaluation and verification of shipborne carbon capture system, explore the formulation of OCCS policies in line with China's national conditions, further improve the legal and regulatory framework, and formulate a scientific and reasonable standard system.
-Planning and layout of the construction of shore-based facilities at the back end
Increase the investment and construction scale of shore-based facilities, pay attention to the optimization and integration of resources in different industries, establish integrated services and cooperation sharing mechanisms for CO2 receiving and transporting, resource sharing and cost sharing, and promote the healthy and orderly development of the whole OCCS industry chain.
-Promote the construction of industrial clusters
Aiming at the compatibility and coupling integration between the whole industry chain of shipboard carbon capture technology (such as the preparation of green methanol fuel), optimize the system energy consumption, reduce the cost level, accelerate the breakthrough of technical bottlenecks, build a low-cost, low-energy, safe and reliable OCCS new technology system, and promote the construction of industrial clusters. To sum up, the relevant laws and regulations of shipboard carbon capture technology and shoreline facilities for CO2 transfer and utilization still need to be improved, but its strong emission reduction potential, flexible matching of emission reduction targets and good economy have gradually received attention from the industry, and more and more investment has been invested in relevant technology research and development at home and abroad. In addition, coupled with the green methanol preparation industry, it can achieve net zero emissions by carbon cycling between onshore preparation and shipboard use. Therefore, shipboard carbon capture technology will be a very competitive technological path for international shipping to achieve carbon neutrality.
Wintech's CCUS experiment platform
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