A cleaning system and method for an amine heat exchange boiler in a ship decarbonization system.

Abstract

The present application includes a cleaning system and a cleaning method for an amine heat exchange boiler in a ship decarbonization system. A cleaning system for an amine heat exchange boiler in a ship decarbonization system includes a boiler heat exchange module, an amine liquid circulation control module, a boiler cleaning control module and a decomposition tower. The heat exchange pipeline and the decomposition tower are connected through the amine liquid circulation control module. The amine liquid circulation control module is used to control the amine liquid to flow back to the decomposition tower when the decarbonization system is shut down, and to control the amine liquid to be delivered to the heat exchange pipeline when the decarbonization system is running. The boiler cleaning control module is connected to the heat exchange pipeline, and the amine liquid adhered to the wall of the heat exchange pipeline is cleaned after the amine liquid flows back to the decomposition tower. When the decarbonization system is shut down, the amine liquid circulation control module will control the amine liquid to flow back to the decomposition tower to prevent the amine liquid from deteriorating due to high temperature. When the decarbonization system is restarted, the amine liquid circulation control module ensures that the system can perform heat exchange and decomposition in the optimal state.

Description

Technical Field

[0001] The invention relates to the technical field of a cleaning system for an amine heat exchange boiler in a ship decarbonization system, and in particular to a cleaning system and a cleaning method for an amine heat exchange boiler in a ship decarbonization system. Background Art

[0002] At present, using waste heat to heat rich amine liquid in the ship decarbonization system is a good energy-saving method. However, the desulfurization system is usually in a continuous operation state, while the decarbonization system is intermittently operated. Due to the different operating states of the two, the amine heat exchange boiler will still be continuously affected by the external heat source when the decarbonization system stops working, causing the boiler temperature to rise. As the temperature continues to rise, the amine liquid in the boiler will undergo chemical changes due to long-term exposure to high temperature, resulting in its performance degradation or even failure. This deterioration phenomenon not only affects the ability of the amine liquid to absorb carbon dioxide, but may also damage the service life of the heat exchange equipment. Therefore, the deterioration of the amine liquid has become the main obstacle to the application of amine heat exchange boilers in the decarbonization system. In addition, the frequent opening and closing of the decarbonization system will also destroy the water-gas balance of the system, further affecting the normal operation of the boiler. Summary of the invention

[0003] In order to solve the problem of amine liquid deterioration and water-gas balance imbalance caused by overheating of the amine heat exchange boiler, the present application provides a cleaning system and a cleaning method for the amine heat exchange boiler in a ship decarbonization system.

[0004] A cleaning system for an amine heat exchange boiler in a ship decarbonization system, the cleaning system for an amine heat exchange boiler in a ship decarbonization system comprising a boiler heat exchange module, an amine liquid circulation control module, a boiler cleaning control module and a desorption tower, the boiler heat exchange module being provided with a heat exchange chamber connected to a flue gas pipeline, and a heat exchange pipeline located in the heat exchange chamber, the heat exchange pipeline and the desorption tower being connected via the amine liquid circulation control module, the amine liquid circulation control module being used, on the one hand, to control the amine liquid to reflux to the desorption tower when the decarbonization system is shut down, and on the other hand, to control the amine liquid to be delivered to the heat exchange pipeline when the decarbonization system is running, the boiler cleaning control module being connected to the heat exchange pipeline for cleaning the amine liquid adhered to the wall of the heat exchange pipeline after the amine liquid refluxes to the desorption tower.

[0005] By adopting the above technical solution, effective control is achieved through the synergistic effect of the boiler heat exchange module, the amine liquid circulation control module, the boiler cleaning control module and the analytical tower. Specifically, when the decarbonization system is shut down, the amine liquid circulation control module will automatically control the amine liquid to flow back to the analytical tower to avoid the amine liquid from staying in the high-temperature heat exchange pipeline and prevent the amine liquid from deteriorating due to high temperature. At the same time, the boiler cleaning control module is started after the amine liquid flows back to clean the amine liquid adhering to the wall of the heat exchange tube, keep the pipeline clean, and avoid residual amine liquid from affecting the subsequent operation of the system. When the decarbonization system is restarted, the amine liquid circulation control module will transport the amine liquid to the heat exchange pipeline to ensure that the system can perform heat exchange and analysis in the optimal state, thereby solving the problem of amine liquid deterioration due to over-temperature and water-gas balance imbalance in the system, and ensuring the stable and efficient operation of the decarbonization system.

[0006] Preferably, the amine liquid circulation control module includes a first circulation pipeline and a second circulation pipeline, the first end of the heat exchange pipeline is connected to one end of the first circulation pipeline, the other end of the first circulation pipeline is connected to the decomposition tower, the second end of the heat exchange pipeline is connected to one end of the second circulation pipeline, the other end of the second circulation pipeline is connected to the decomposition tower, and the flow direction of the fluid in the first circulation pipeline is opposite to the flow direction of the fluid in the second circulation pipeline.

[0007] By adopting the above technical solution, the first circulation pipeline and the second circulation pipeline are respectively connected to the heat exchange pipeline, and the fluid flow directions in the two are opposite, which can realize the two-way flow of the amine liquid in the pipeline, ensure that the amine liquid flows evenly in the pipeline and fully participates in the heat exchange and reflux process, thereby improving the heat exchange efficiency and avoiding the problem of local amine liquid retention or insufficient heat exchange due to unidirectional flow.

[0008] Preferably, the first circulation pipeline includes a first heat exchange valve, a first gas-liquid separator and a breathable valve, one end of the first heat exchange valve is connected to the heat exchange pipeline, the other end of the first heat exchange valve is connected to the first fluid conducting end of the first gas-liquid separator, the second fluid conducting end of the first gas-liquid separator is connected to the first end of the breathable valve, and the second end of the breathable valve is connected to the analysis tower.

[0009] By adopting the above technical scheme, the arrangement of the first heat exchange valve, the first gas-liquid separator and the breathable valve in the first circulation pipeline can ensure the effective separation of the amine liquid from the gas in the analysis tower, and separate the gas in the analysis tower from the amine liquid in the pipeline through the breathable valve, thereby improving the fluid separation efficiency in the heat exchange process, avoiding the mixing of gas into the amine liquid and affecting its circulation effect, and effectively controlling the pressure balance in the system.

[0010] Preferably, a backup pipeline for cleaning liquid is provided between the gas conducting end of the first gas-liquid separator and the boiler cleaning control module, and the backup pipeline for cleaning liquid includes a cooling valve and a condenser, one end of the cooling valve is connected to the gas conducting end of the first gas-liquid separator, the other end of the cooling valve is connected to one end of the condenser, and the other end of the condenser is connected to the boiler cleaning control module.

[0011] By adopting the above technical solution, a spare cleaning liquid pipeline is set between the first gas-liquid separator and the boiler cleaning control module, and the gas is cooled by the cooling valve and the condenser to generate the cleaning liquid. This can ensure that the cleaning program is started immediately after the amine liquid refluxes, and avoid the amine liquid remaining on the wall of the heat exchange tube for a long time under high temperature conditions, thereby improving the cleanliness and cleaning efficiency of the heat exchange tube and reducing the influence of the attachments on the tube wall on the system performance.

[0012] Preferably, the second circulation pipeline includes a second heat exchange valve, a circulation bypass valve and a heat exchange pump valve assembly, one end of the second heat exchange valve is connected to the heat exchange pipeline, the other end of the second heat exchange valve is connected to one end of the heat exchange pump valve assembly, the other end of the heat exchange pump valve assembly is connected to the decomposition tower, the other end of the second heat exchange valve is connected to one end of the circulation bypass valve, and the other end of the circulation bypass valve is connected to the decomposition tower.

[0013] By adopting the above technical solution, the second heat exchange valve, the circulation bypass valve and the heat exchange pump valve assembly in the second circulation pipeline are arranged to flexibly control the flow direction of the fluid during the circulation of the amine liquid, ensuring that the amine liquid flows smoothly during the heat exchange and analysis process. At the same time, by adjusting the bypass valve, excessive amine liquid is prevented from flowing back to the analysis tower, thereby improving the thermal energy utilization efficiency of the amine liquid and reducing amine liquid loss and energy waste.

[0014] Preferably, the boiler cleaning control module includes a cleaning liquid filling pipeline and a cleaning liquid circulation pipeline, the first end of the heat exchange pipeline is connected to the reflux end of the cleaning liquid circulation pipeline, the delivery end of the cleaning liquid circulation pipeline is connected to the second end of the heat exchange pipeline, and the cleaning liquid output end of the cleaning liquid filling pipeline is connected to the reflux end of the cleaning liquid circulation pipeline.

[0015] By adopting the above technical solution, the boiler cleaning control module can timely provide cleaning liquid to the heat exchange pipeline and perform circulation cleaning through the configuration of the cleaning liquid filling pipeline and the cleaning liquid circulation pipeline, thereby ensuring sufficient flow and effective coverage of the cleaning liquid in the pipeline, and timely removing the amine liquid residue on the pipe wall, thereby improving the cleaning effect and avoiding the long-term accumulation of amine liquid leading to a decrease in heat exchange efficiency.

[0016] Preferably, the cleaning liquid circulation pipeline includes a first cleaning bypass valve, a second cleaning bypass valve, a jet pump, a cleaning pump valve assembly and a second gas-liquid separator, one end of the first cleaning bypass valve is connected to the first end of the heat exchange pipeline, the first cleaning bypass valve is connected to the first fluid conducting end of the second gas-liquid separator, the second fluid conducting end of the second gas-liquid separator is connected to one end of the cleaning pump valve assembly, the other end of the cleaning pump valve assembly is connected to the first end of the jet pump, the second end of the jet pump is connected to the first end of the second cleaning bypass valve, the second end of the second cleaning bypass valve is connected to the second end of the heat exchange pipeline, a gas mixing pipeline is provided between the third end of the jet pump and the analysis tower, the gas mixing pipeline is used to transport the gas in the analysis tower to the jet pump for mixing with the cleaning liquid, and the gas conducting end of the second gas-liquid separator is connected to the gas mixing pipeline.

[0017] By adopting the above technical scheme, the first cleaning bypass valve, the second cleaning bypass valve, the jet pump, the cleaning pump valve assembly and the second gas-liquid separator in the cleaning liquid circulation pipeline are arranged, so that the cleaning liquid and the analysis tower gas can be mixed during the cleaning process, and the impact force of the cleaning liquid can be enhanced by utilizing the effect of the jet pump, thereby ensuring fluid mixing and efficient flushing during the cleaning process, thereby improving the cleaning effect and ensuring the smooth operation of the heat exchange pipeline after efficient cleaning.

[0018] Preferably, the cleaning liquid filling pipeline includes a cleaning liquid storage tank, a first liquid level sensor and a filling valve, the first liquid level sensor is used to monitor the liquid level of the cleaning liquid in the cleaning liquid storage tank, thereby enabling an external water supply pipeline or an internal backup water supply pipeline to supply water, the output end of the cleaning liquid storage tank is connected to one end of the filling valve, and the other end of the filling valve is connected to the first fluid conducting end of the second gas-liquid separator, the second gas-liquid separator is provided with a second liquid level sensor electrically connected to the filling valve, the second liquid level sensor is used to monitor the liquid level of the cleaning liquid in the second gas-liquid separator, thereby enabling the filling valve to be opened or closed.

[0019] By adopting the above technical solution, the cleaning fluid filling pipeline, through the configuration of the cleaning fluid storage tank, the liquid level sensor and the filling valve, can monitor the liquid level of the cleaning fluid storage tank in real time and automatically replenish the cleaning fluid, thereby ensuring the timeliness and adequacy of the cleaning fluid supply, avoiding the weakening of the cleaning effect due to insufficient cleaning fluid during the cleaning process, thereby improving the continuity and stability of the cleaning process.

[0020] Preferably, the cleaning system of the amine heat exchange boiler in the ship decarbonization system also includes a discharge module, the discharge module includes a first recovery pipeline and a second recovery pipeline, one end of the first recovery pipeline is connected to the second end of the cleaning pump valve assembly, the other end of the first recovery pipeline is connected to the decomposition tower, one end of the second recovery pipeline is connected to the amine liquid circulation control module, and the other end of the second recovery pipeline is connected to the decomposition tower.

[0021] By adopting the above technical solution, the discharge module can discharge the circulated cleaning liquid to the analysis tower in time after the cleaning process is completed through the setting of the first recovery pipeline and the second recovery pipeline, so as to avoid the cleaning liquid remaining in the system pipeline and affecting the subsequent operation, and at the same time ensure the separation and recovery of the amine liquid and the cleaning liquid, thereby improving the operation safety and fluid management efficiency of the system.

[0022] A cleaning method based on a cleaning system of an amine heat exchange boiler in a ship decarbonization system is applied to a cleaning system of an amine heat exchange boiler in a ship decarbonization system, and the cleaning method comprises:

[0023] If the decarbonization system stops running, only the second circulation pipeline and the first circulation pipeline in the amine liquid circulation control module are controlled to open, the second circulation pipeline is used to allow the amine liquid in the heat exchange pipeline to automatically flow back to the desorption tower by gravity, the first circulation pipeline is used to allow the gas in the desorption tower to be filled into the heat exchange pipeline, the first circulation pipeline at least includes a first heat exchange valve, a first gas-liquid separator and a breathable valve, and the second circulation pipeline at least includes a second heat exchange valve, a circulation bypass valve and a heat exchange pump valve assembly;

[0024] Acquire the actual amine liquid content in the heat exchange pipeline, compare the actual amine liquid content with the determined preset amine liquid content, and if the actual amine liquid content is lower than the determined preset amine liquid content, control the cleaning liquid filling pipeline in the boiler cleaning control module to open, and control the second circulation pipeline and the first circulation pipeline to close, the cleaning liquid filling pipeline is used to supply the corresponding current cleaning liquid content, and the cleaning liquid filling pipeline at least includes a filling valve;

[0025] Acquire the current cleaning liquid content in real time, compare the current cleaning liquid content with the determined preset cleaning liquid content, and if the current cleaning liquid content is higher than or equal to the determined first preset cleaning liquid content, control the cleaning liquid filling pipeline to close, and open the cleaning liquid circulation pipeline in the boiler cleaning control module, the cleaning liquid circulation pipeline is used to perform a cleaning cycle, the cleaning cycle is used to clean the amine liquid adhered to the wall of the heat exchange pipeline, and the cleaning liquid circulation pipeline at least includes a first cleaning bypass valve, a second cleaning bypass valve, a jet pump, a cleaning pump valve assembly, and a second gas-liquid separator;

[0026] When it is detected that the number of cycles of the cleaning cycle reaches a preset number, the discharge module is controlled to open to discharge the cleaning fluid after the cycle, and when the discharge is completed, the discharge module and the cleaning fluid circulation pipeline are controlled to close;

[0027] If the decarbonization system starts to run, only the second circulation pipeline and the first circulation pipeline are controlled to be opened, so that the amine liquid stored in the decomposition tower after the decarbonization system stops running is transported to the heat exchange pipeline through the second circulation pipeline to perform the corresponding heating operation, thereby generating a vapor-liquid two-phase amine liquid, and the vapor-liquid two-phase amine liquid is circulated and transported to the decomposition tower through the first circulation pipeline.

[0028] By adopting the above technical solution, through the amine liquid circulation control module and the boiler cleaning control module, the method realizes the automatic reflux and cleaning of the amine liquid when the decarbonization system stops running, preventing the amine liquid from staying in the high-temperature pipeline for a long time and deteriorating, and at the same time ensuring the gas balance through the first circulation pipeline. The system automatically injects cleaning liquid according to the amine liquid content, and removes the amine liquid residue on the pipe wall through the cleaning cycle to avoid fouling affecting the heat exchange efficiency. After the cleaning is completed, the cleaning liquid is discharged, and the system is ready to enter the next round of operation or cleaning. When the decarbonization system is restarted, the amine liquid is transported to the heat exchange pipeline through the second circulation pipeline and heated into a vapor-liquid two-phase mixture to continue the decarbonization task, thereby ensuring the efficient and stable operation of the system and preventing the amine liquid from deteriorating.

[0029] In summary, the present application includes at least one of the following beneficial technical effects:

[0030] 1. Effective control is achieved through the synergistic effect of the boiler heat exchange module, amine liquid circulation control module, boiler cleaning control module and decomposition tower. Specifically, when the decarbonization system is shut down, the amine liquid circulation control module will automatically control the amine liquid to flow back to the decomposition tower to avoid the amine liquid staying in the high-temperature heat exchange pipeline and prevent the amine liquid from deteriorating due to high temperature. At the same time, the boiler cleaning control module starts after the amine liquid flows back to clean the amine liquid adhering to the wall of the heat exchange tube to keep the pipeline clean and avoid residual amine liquid from affecting the subsequent operation of the system. When the decarbonization system is restarted, the amine liquid circulation control module will transport the amine liquid to the heat exchange pipeline to ensure that the system can perform heat exchange and decomposition in the optimal state, thereby solving the problem of amine liquid deterioration due to over-temperature and water-gas balance imbalance in the system, and ensuring the stable and efficient operation of the decarbonization system;

[0031] 2. Through the amine liquid circulation control module and the boiler cleaning control module, this cleaning method realizes the automatic reflux and cleaning of the amine liquid when the decarbonization system stops running, preventing the amine liquid from staying in the high-temperature pipeline for a long time and deteriorating, and at the same time ensuring gas balance through the first circulation pipeline. The system automatically injects cleaning liquid according to the amine liquid content, and removes the amine liquid residue on the pipe wall through the cleaning cycle to avoid scaling and affect the heat exchange efficiency. After the cleaning is completed, the cleaning liquid is discharged and the system is ready to enter the next round of operation or cleaning. When the decarbonization system is restarted, the amine liquid is transported to the heat exchange pipeline through the second circulation pipeline and heated into a vapor-liquid two-phase mixture to continue the decarbonization task, thereby ensuring the efficient and stable operation of the system and preventing the amine liquid from deteriorating;

[0032] 3. This cleaning system solves the problem of amine liquid deteriorating in the heat exchange boiler and the boiler being unable to operate stably for a long time, and reduces a lot of energy consumption for the decarbonization system. It is estimated that 2.4GJ of energy can be saved for every ton of carbon dioxide captured. This cleaning system cleverly utilizes the water and gas in the desulfurization system, does not require additional cleaning water and gas, and does not burden the water and gas balance of the system. This cleaning system is fully automatic and does not require manual intervention. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a flow chart of a cleaning system for an amine heat exchange boiler in a ship decarbonization system in one embodiment of the present application.

[0034] Figure 2 It is a structural schematic diagram of a cleaning system for an amine heat exchange boiler in a ship decarbonization system in one embodiment of the present application.

[0035] Figure 3 The present invention is a flow chart of a method for cleaning an amine heat exchange boiler in a ship decarbonization system in one embodiment of the present application.

[0036] Description of reference numerals:

[0037] 1. Boiler heat exchange module; 11. Heat exchange pipeline; 12. Heat exchange chamber; 2. Amine liquid circulation control module; 21. First circulation pipeline; 211. First heat exchange valve; 212. First gas-liquid separator; 213. Breathing valve; 22. Second circulation pipeline; 221. Second heat exchange valve; 222. Circulation bypass valve; 223. Heat exchange pump valve assembly; 23. Cleaning liquid spare pipeline; 231. Cooling valve; 232. Condenser; 3. Boiler cleaning control module block; 31, cleaning liquid filling pipeline; 311, cleaning liquid storage tank; 312, first liquid level sensor; 313, filling valve; 32, cleaning liquid circulation pipeline; 321, first cleaning bypass valve; 322, second cleaning bypass valve; 323, jet pump; 324, cleaning pump valve assembly; 325, second gas-liquid separator; 326, second liquid level sensor; 4, analysis tower; 5, discharge module; 51, first recovery pipeline; 52, second recovery pipeline. DETAILED DESCRIPTION

[0038] The present application is further described in detail below in conjunction with the accompanying drawings.

[0039] In one embodiment, if Figure 1 As shown, the present application discloses a cleaning system for an amine heat exchange boiler in a ship decarbonization system, which specifically includes the following steps:

[0040] A cleaning system for an amine heat exchange boiler in a ship decarbonization system, the cleaning system for an amine heat exchange boiler in a ship decarbonization system comprising a boiler heat exchange module 1, an amine liquid circulation control module 2, a boiler cleaning control module 3 and a desorption tower 4, wherein the boiler heat exchange module 1 is provided with a heat exchange chamber 12 connected to a flue gas pipeline, and a heat exchange pipeline 11 located in the heat exchange chamber 12, the heat exchange pipeline 11 and the desorption tower 4 are connected via the amine liquid circulation control module 2, the amine liquid circulation control module 2 is used on the one hand to control the amine liquid to reflux to the desorption tower 4 when the decarbonization system is shut down, and on the other hand to control the amine liquid to be delivered to the heat exchange pipeline 11 when the decarbonization system is running, the boiler cleaning control module 3 is connected to the heat exchange pipeline 11, so as to clean the amine liquid adhered to the wall of the heat exchange pipeline 11 after the amine liquid refluxes to the desorption tower 4.

[0041] In this embodiment, the cleaning system of the amine heat exchange boiler in the ship decarbonization system realizes the flow, heating and cleaning process of the amine liquid through the synergistic effect of multiple modules and pipelines, ensuring the efficient operation of the system. The boiler heat exchange module 1 is connected to the flue gas pipeline through the heat exchange chamber 12, and the waste heat provided by the flue gas is used to heat the amine liquid in the heat exchange pipeline 11. The amine liquid circulation control module 2 is the key to connecting the heat exchange pipeline 11 and the desorption tower 4, and the flow of the amine liquid in different states of the decarbonization system is controlled by this module. When the decarbonization system is closed, the amine liquid circulation control module 2 will transport the amine liquid back to the desorption tower 4 through reflux control to prevent the amine liquid from deteriorating due to being trapped in the high-temperature heat exchange tube; and when the system is running, the amine liquid circulation control module 2 is responsible for transporting the amine liquid to the heat exchange pipeline 11 to ensure that it effectively participates in heating and desorption. At the same time, the boiler cleaning control module 3 is connected to the heat exchange pipeline 11, and the cleaning function is started after the amine liquid flows back to the desorption tower 4 to remove the residual amine liquid on the pipe wall to avoid its influence on the subsequent operation of the system. Through the design of this pipeline and control module, the system can not only flexibly respond to the amine liquid treatment requirements under different operating conditions, but also effectively maintain the cleanliness of the heat exchange pipeline 11, ensuring that the amine liquid is always in the best state during the decarbonization and cleaning process, and ensuring the stability and long-term operation of the system. Each module in this control logic has a clear division of labor, and through the analytical tower 4 as the core hub, it realizes the efficient reflux, circulation and cleaning of the amine liquid, ensures the balance and switching between gas and liquid, and the system can intelligently adjust each process to avoid problems such as water-gas imbalance and amine liquid deterioration.

[0042] Furthermore, after being emptied, due to the suction effect of the amine liquid, the gas in the desorption tower will fill the space originally occupied by the amine liquid in the boiler, that is, the space in the heat exchange pipeline 11. The suction effect here means that when the amine liquid in the boiler is emptied under the action of gravity, a pressure difference will be formed inside the boiler. Since the pressure inside the boiler is lower than that outside (inside the desorption tower), this pressure difference will cause the gas in the desorption tower to naturally flow into the boiler, thereby filling the space originally occupied by the amine liquid. This phenomenon is similar to the vacuum attraction or suction effect, that is, when the pressure of a closed space is reduced, the external gas will automatically flow in due to the pressure difference.

[0043] In summary, effective control is achieved through the synergistic effect of the boiler heat exchange module 1, the amine liquid circulation control module 2, the boiler cleaning control module 3 and the analytical tower 4. Specifically, when the decarbonization system is shut down, the amine liquid circulation control module 2 will automatically control the amine liquid to flow back to the analytical tower 4, so as to avoid the amine liquid from staying in the high-temperature heat exchange pipeline 11 and prevent the amine liquid from deteriorating due to high temperature. At the same time, the boiler cleaning control module 3 is started after the amine liquid flows back, and the amine liquid adhering to the wall of the heat exchange tube is cleaned to keep the pipeline clean and avoid the residual amine liquid from affecting the subsequent operation of the system. When the decarbonization system is restarted, the amine liquid circulation control module 2 will transport the amine liquid to the heat exchange pipeline 11 to ensure that the system can perform heat exchange and analysis in the optimal state, thereby solving the problem of amine liquid deterioration due to over-temperature and water-gas balance imbalance in the system, and ensuring the stable and efficient operation of the decarbonization system.

[0044] Further, such as Figure 2 As shown, the amine liquid circulation control module 2 includes a first circulation pipeline 21 and a second circulation pipeline 22, the first end of the heat exchange pipeline 11 is connected to one end of the first circulation pipeline 21, the other end of the first circulation pipeline 21 is connected to the decomposition tower 4, the second end of the heat exchange pipeline 11 is connected to one end of the second circulation pipeline 22, the other end of the second circulation pipeline 22 is connected to the decomposition tower 4, and the flow direction of the fluid in the first circulation pipeline 21 is opposite to the flow direction of the fluid in the second circulation pipeline 22.

[0045] In this embodiment, in the design of the amine liquid circulation control module 2, the first circulation pipeline 21 and the second circulation pipeline 22 are respectively connected to the two ends of the heat exchange pipeline 11, forming a closed-loop circulation system. The first end of the heat exchange pipeline 11 is connected to the first circulation pipeline 21, and the other end of the first circulation pipeline 21 is connected to the analytical tower 4, which is used to discharge the amine liquid from the heat exchange pipeline 11 and return it to the analytical tower 4; at the same time, the second end of the heat exchange pipeline 11 is connected to the second circulation pipeline 22, and the other end of the second circulation pipeline 22 is also connected to the analytical tower 4, which is responsible for transporting the amine liquid from the analytical tower 4 back to the heat exchange pipeline 11. The fluids in the two circulation pipelines flow in opposite directions. Such design logic is to achieve two-way fluid circulation when the system is running, ensuring that the amine liquid can flow effectively in the pipeline and evenly participate in heat exchange. When the decarbonization system stops running, the amine liquid automatically flows back to the analysis tower 4 through the first circulation pipeline 21 to prevent the amine liquid from being retained in the heat exchange tube for a long time and overheating and deterioration. When the system is started, the amine liquid is transported to the heat exchange pipeline 11 through the second circulation pipeline 22 to ensure that the system can quickly resume normal heating and analysis operations. This design not only ensures the efficient flow of the amine liquid under different conditions through a two-way circulation method, but also reduces the retained fluid in the pipeline, thereby improving the overall efficiency and operational stability of the system. In addition, by controlling the flow direction of the first circulation pipeline 21 and the second circulation pipeline 22 and the opening and closing of the valve group, the system can automatically adjust the flow state of the amine liquid, ensuring water and gas balance while avoiding the performance degradation of the amine liquid due to long-term retention at high temperature.

[0046] To summarize, the first circulation pipeline 21 and the second circulation pipeline 22 are respectively connected to the heat exchange pipeline 11, and the fluid flow directions in the two are opposite, which can realize the two-way flow of the amine liquid in the pipeline, ensure that the amine liquid flows evenly in the pipeline and fully participates in the heat exchange and reflux process, thereby improving the heat exchange efficiency and avoiding the problem of local amine liquid retention or insufficient heat exchange due to unidirectional flow.

[0047] Further, such as Figure 2 As shown, the first circulation pipeline 21 includes a first heat exchange valve 211, a first gas-liquid separator 212 and a breathable valve 213, one end of the first heat exchange valve 211 is connected to the heat exchange pipeline 11, the other end of the first heat exchange valve 211 is connected to the first fluid conducting end of the first gas-liquid separator 212, the second fluid conducting end of the first gas-liquid separator 212 is connected to the first end of the breathable valve 213, and the second end of the breathable valve 213 is connected to the analysis tower 4.

[0048] In this embodiment, in the system described in this paragraph, the first circulation pipeline 21 realizes the reflux and gas-liquid separation control of the amine liquid through the coordinated work of multiple key modules. First, the first heat exchange valve 211 is used as the fluid control point of the amine liquid, one end of which is connected to the heat exchange pipeline 11, and the other end is connected to the first gas-liquid separator 212, which is used to open or close at an appropriate time to control the flow of the amine liquid from the heat exchange pipeline 11 into the first gas-liquid separator 212. After the amine liquid enters the first gas-liquid separator 212 through the first heat exchange valve 211, the function of the first gas-liquid separator 212 is to separate the mixed gas and liquid, ensuring that the amine liquid flowing into the analytical tower 4 is a pure liquid after separation, and the gas part is discharged through another passage. The first fluid conduction end of the first gas-liquid separator 212 is connected to the first heat exchange valve 211 to ensure the smooth flow of the liquid, and at the same time, its second fluid conduction end is connected to the breathable valve 213, and the function of the breathable valve 213 is to discharge the separated gas and guide it back to the analytical tower 4. As a control point, the breathable valve 213 ensures that the gas can enter the analytical tower 4 under appropriate pressure and flow conditions, maintain the fluid balance of the system, and prevent excessive gas from entering the circulation pipeline to affect the flow of the amine liquid. The second end of the breathable valve 213 is directly connected to the analytical tower 4 to ensure that the gas eventually returns to the analytical tower 4 for processing or release, thereby maintaining effective separation and balanced flow of gas and liquid throughout the process. This control logic ensures that gas-liquid separation can be performed simultaneously when the amine liquid refluxes, preventing gas from entering the amine liquid fluid circuit during the circulation process, affecting the heat exchange efficiency and operating stability of the system. At the same time, through the coordinated action of these valves, the system can accurately control the reflux and separation of the fluid.

[0049] To sum up, the arrangement of the first heat exchange valve 211, the first gas-liquid separator 212 and the breathable valve 213 in the first circulation pipeline 21 can ensure the effective separation of the amine liquid from the gas in the analysis tower 4, and separate the gas in the analysis tower 4 from the amine liquid in the pipeline through the breathable valve 213, thereby improving the fluid separation efficiency during the heat exchange process, avoiding the mixing of gas into the amine liquid and affecting its circulation effect, and effectively controlling the pressure balance in the system.

[0050] Further, such as Figure 2 As shown, a cleaning liquid backup pipeline 23 is provided between the gas conducting end of the first gas-liquid separator 212 and the boiler cleaning control module 3, and the cleaning liquid backup pipeline 23 includes a cooling valve 231 and a condenser 232. One end of the cooling valve 231 is connected to the gas conducting end of the first gas-liquid separator 212, and the other end of the cooling valve 231 is connected to one end of the condenser 232, and the other end of the condenser 232 is connected to the boiler cleaning control module 3.

[0051] In this embodiment, in the system, the gas conducting end of the first gas-liquid separator 212 is connected to the boiler cleaning control module 3 through the cleaning liquid standby pipeline 23 to form a complete cleaning liquid supply and processing circuit. Specifically, the gas conducting end of the first gas-liquid separator 212 is connected to the cooling valve 231 of the cleaning liquid standby pipeline 23, and the cooling valve 231 plays a role in regulating the temperature of the fluid in this pipeline. When the gas derived from the first gas-liquid separator 212 passes through the cooling valve 231, the valve will adjust the flow rate and temperature of the gas according to actual needs to ensure that the temperature of the gas entering the condenser 232 is within an appropriate range. The condenser 232 is immediately after the cooling valve 231 and is responsible for condensing the gas passing through the cooling valve 231 and condensing the moisture in the gas into liquid cleaning liquid. The condensed liquid flows to the boiler cleaning control module 3 through the other end of the condenser 232, and is used to clean the amine liquid remaining on the heat exchange tube wall in the system. In this way, the cooling valve 231 and the condenser 232 not only ensure the condensation and liquefaction of the gas, but also provide sufficient cleaning liquid resources to maintain the stable operation of the system cleaning cycle. In addition, the design logic of this cleaning liquid backup pipeline 23 ensures that the water generated during the gas separation process will not be wasted, but will be directly used for the cleaning operation after condensation treatment, thus realizing the recycling of resources to the greatest extent, while maintaining the stability of the temperature and liquid supply during the system cleaning process, ensuring the operating efficiency and reliability of the entire system.

[0052] To sum up, a cleaning liquid backup pipeline 23 is set between the first gas-liquid separator 212 and the boiler cleaning control module 3. The gas is cooled and the cleaning liquid is generated through the cooling valve 231 and the condenser 232, which can ensure that the cleaning program is started immediately after the amine liquid refluxes, and avoid the amine liquid remaining on the wall of the heat exchange tube for a long time under high temperature conditions, thereby improving the cleanliness and cleaning efficiency of the heat exchange tube and reducing the impact of attachments on the tube wall on the system performance.

[0053] Further, such as Figure 2 As shown, the second circulation pipeline 22 includes a second heat exchange valve 221, a circulation bypass valve 222 and a heat exchange pump valve assembly 223, one end of the second heat exchange valve 221 is connected to the heat exchange pipeline 11, the other end of the second heat exchange valve 221 is connected to one end of the heat exchange pump valve assembly 223, the other end of the heat exchange pump valve assembly 223 is connected to the decomposition tower 4, the other end of the second heat exchange valve 221 is connected to one end of the circulation bypass valve 222, and the other end of the circulation bypass valve 222 is connected to the decomposition tower 4.

[0054] In this embodiment, in this system, the second circulation pipeline 22 realizes efficient circulation and control of the amine liquid through the combination of multiple key components. One end of the second heat exchange valve 221 is connected to the heat exchange pipeline 11, which is responsible for regulating the flow of the amine liquid in the heat exchange pipeline 11, and the other end is connected to the heat exchange pump valve assembly 223. The function of the heat exchange pump valve assembly 223 is to provide sufficient power for the amine liquid when the system is running, ensuring that the amine liquid can flow smoothly from the heat exchange pipeline 11 to the analysis tower 4, so as to perform heat exchange and analysis operations. The other end of the heat exchange pump valve assembly 223 is connected to the analysis tower 4 to ensure that the pumped amine liquid can flow back to the analysis tower 4 smoothly to complete the closed-loop circulation. At the same time, the other end of the second heat exchange valve 221 is also connected to the circulation bypass valve 222. The function of the circulation bypass valve 222 is to provide a bypass for the amine liquid under certain circumstances, so that the amine liquid can flow directly back to the analysis tower 4, bypassing part of the pipeline, so as to achieve rapid flow or reduce energy loss. The other end of the circulation bypass valve 222 is connected to the analytical tower 4 to ensure that the bypassed amine liquid can directly flow back to the analytical tower 4 for treatment. Through such a pipeline design, the system can flexibly adjust the flow direction and flow rate of the amine liquid according to different working conditions and needs, which not only ensures the effective circulation of the amine liquid in the heat exchange pipeline 11, but also provides a flexible fluid regulation mechanism through the bypass valve, thereby improving the overall operation efficiency and stability of the system.

[0055] To sum up, the arrangement of the second heat exchange valve 221, the circulation bypass valve 222 and the heat exchange pump valve assembly 223 in the second circulation pipeline 22 can flexibly control the flow direction of the fluid during the circulation of the amine liquid, ensuring that the amine liquid flows smoothly during the heat exchange and analysis process, and at the same time, by adjusting the bypass valve, avoid excessive amine liquid from flowing back to the analysis tower 4, thereby improving the thermal energy utilization efficiency of the amine liquid and reducing amine liquid loss and energy waste.

[0056] Further, such as Figure 2 As shown, the boiler cleaning control module 3 includes a cleaning liquid filling pipeline 31 and a cleaning liquid circulation pipeline 32, the first end of the heat exchange pipeline 11 is connected to the reflux end of the cleaning liquid circulation pipeline 32, the delivery end of the cleaning liquid circulation pipeline 32 is connected to the second end of the heat exchange pipeline 11, and the cleaning liquid output end of the cleaning liquid filling pipeline 31 is connected to the reflux end of the cleaning liquid circulation pipeline 32.

[0057] In this embodiment, in the system, the design of the boiler cleaning control module 3 realizes the cleaning operation of the heat exchange pipeline 11 through the cleaning liquid filling pipeline 31 and the cleaning liquid circulation pipeline 32. Specifically, the first end of the heat exchange pipeline 11 is connected to the reflux end of the cleaning liquid circulation pipeline 32, ensuring that during the cleaning process, the cleaning liquid can flow back from the heat exchange pipeline 11 to the cleaning liquid circulation pipeline 32 to form a closed-loop cleaning circuit. At the same time, the delivery end of the cleaning liquid circulation pipeline 32 is connected to the second end of the heat exchange pipeline 11, ensuring that the cleaning liquid can be transported from the cleaning pipeline to the other end of the heat exchange pipeline 11 for comprehensive pipeline cleaning. The cleaning liquid output end of the cleaning liquid filling pipeline 31 is connected to the reflux end of the cleaning liquid circulation pipeline 32. Such a design enables the cleaning liquid to be timely replenished into the cleaning liquid circulation pipeline 32 through the filling pipeline when the system is started, ensuring that a sufficient amount of cleaning liquid can be provided at the beginning of the cleaning process. Through the setting of this pipeline structure, the cleaning liquid can circulate smoothly between the heat exchange pipeline 11 and the circulation pipeline, ensuring that the residual amine liquid on the heat exchange tube wall is completely removed. The entire cleaning process not only ensures the efficient flow of the cleaning liquid, but also ensures the timely replenishment and efficient recovery of the cleaning liquid through the dual pipeline design of filling and circulation, further improving the cleaning effect and ensuring the cleanliness and efficiency of the heat exchange pipeline 11 in subsequent operation.

[0058] To sum up, the boiler cleaning control module 3 can provide cleaning liquid to the heat exchange pipeline 11 in time and perform circulation cleaning through the configuration of the cleaning liquid filling pipeline 31 and the cleaning liquid circulation pipeline 32, ensuring sufficient flow and effective coverage of the cleaning liquid in the pipeline, and can promptly remove the amine liquid residue on the pipe wall, thereby improving the cleaning effect and avoiding the long-term accumulation of amine liquid leading to a decrease in heat exchange efficiency.

[0059] Further, such as Figure 1-2 As shown, the cleaning liquid circulation pipeline 32 includes a first cleaning bypass valve 321, a second cleaning bypass valve 322, a jet pump 323, a cleaning pump valve assembly 324 and a second gas-liquid separator 325, one end of the first cleaning bypass valve 321 is connected to the first end of the heat exchange pipeline 11, the first cleaning bypass valve 321 is connected to the first fluid conducting end of the second gas-liquid separator 325, the second fluid conducting end of the second gas-liquid separator 325 is connected to one end of the cleaning pump valve assembly 324, and the cleaning pump valve assembly 324 is connected to the first end of the heat exchange pipeline 11. The other end is connected to the first end of the jet pump 323, the second end of the jet pump 323 is connected to the first end of the second cleaning bypass valve 322, the second end of the second cleaning bypass valve 322 is connected to the second end of the heat exchange pipeline 11, and a gas mixing pipeline is provided between the third end of the jet pump 323 and the analysis tower 4, and the gas mixing pipeline is used to transport the gas in the analysis tower 4 to the jet pump 323 to mix with the cleaning liquid, and the gas conducting end of the second gas-liquid separator 325 is connected to the gas mixing pipeline.

[0060] In this embodiment, in the system, the cleaning liquid circulation pipeline 32 ensures the efficient circulation and cleaning process of the cleaning liquid in the heat exchange pipeline 11 through the synergistic effect of multiple key components. One end of the first cleaning bypass valve 321 is connected to the first end of the heat exchange pipeline 11 to ensure that the cleaning liquid can enter the cleaning circulation system through the valve when needed. The other end of the first cleaning bypass valve 321 is connected to the first fluid conduction end of the second gas-liquid separator 325. The function of the second gas-liquid separator 325 is to separate the gas and liquid generated during the cleaning process to ensure that the cleaning liquid can fully play its cleaning role. The second fluid conduction end of the second gas-liquid separator 325 is connected to the cleaning pump valve assembly 324. The cleaning pump valve assembly 324 provides power to transport the cleaning liquid from the second gas-liquid separator 325 to the jet pump 323. The first end of the jet pump 323 receives the cleaning liquid from the cleaning pump. The second end of the jet pump 323 is connected to the first end of the second cleaning bypass valve 322, and the second end of the second cleaning bypass valve 322 is connected to the second end of the heat exchange pipeline 11, forming a closed-loop cleaning circuit to ensure that the cleaning liquid can circulate effectively, enter and exit the heat exchange pipeline 11 through both ends, and remove dirt on the pipe wall. At the same time, a gas mixing pipeline is provided between the third end of the jet pump 323 and the analysis tower 4, and the gas in the analysis tower 4 is transported to the jet pump 323 through the pipeline to mix with the cleaning liquid, increase the kinetic energy and impact force of the fluid, and thus improve the cleaning effect. The gas conduction end of the second gas-liquid separator 325 is connected to the gas mixing pipeline to ensure that the separation and mixing process of gas and liquid in the system can be coordinated, so that the mixing of the cleaning liquid and the gas reaches the optimal ratio, effectively improves the flushing ability of the cleaning liquid in the pipeline, and ensures the efficient cleaning of the heat exchange pipeline 11 and the long-term operation stability of the system.

[0061] Furthermore, the purpose of mixing the cleaning liquid and the gas in the analysis tower 4 together is to enhance the cleaning effect by means of gas-liquid mixing. After the gas and clean water are mixed, a gas-liquid two-phase flow will be formed. This mixed flow can produce stronger impact force and turbulence in the boiler pipe, making it easier to peel off and clean the amine liquid residue attached to the pipe wall. The gas-liquid mixing can expand the coverage area of ​​the cleaning liquid and reduce the required amount of clean water. At the same time, it relies on the airflow to promote the flow of the cleaning liquid in the pipe to improve the cleaning efficiency. The gas helps prevent scaling and blockage on the inner wall of the pipe during the cleaning process. The impact force of the airflow can promptly remove attachments that have not yet hardened and maintain the pipeline unobstructed. The gas in the analysis tower 4 may be a low-temperature or normal-temperature gas. By mixing with clean water, it can avoid the impact of excessive temperature on the boiler pipe during the cleaning process.

[0062] To sum up, the arrangement of the first cleaning bypass valve 321, the second cleaning bypass valve 322, the jet pump 323, the cleaning pump valve assembly 324 and the second gas-liquid separator 325 in the cleaning liquid circulation pipeline 32 can achieve the mixing of the cleaning liquid and the gas in the analysis tower 4 during the cleaning process, and utilize the action of the jet pump 323 to enhance the impact force of the cleaning liquid, ensure the fluid mixing and efficient flushing during the cleaning process, thereby improving the cleaning effect and ensuring the smooth operation of the heat exchange pipeline 11 after efficient cleaning.

[0063] Further, such as Figure 2 As shown, the cleaning liquid filling pipeline 31 includes a cleaning liquid storage tank 311, a first liquid level sensor 312 and a filling valve 313. The first liquid level sensor 312 is used to monitor the liquid level of the cleaning liquid in the cleaning liquid storage tank 311, thereby enabling an external water supply pipeline or an internal backup water supply pipeline to supply water. The output end of the cleaning liquid storage tank 311 is connected to one end of the filling valve 313, and the other end of the filling valve 313 is connected to the first fluid conducting end of the second gas-liquid separator 325. The second gas-liquid separator 325 is provided with a second liquid level sensor 326 electrically connected to the filling valve 313. The second liquid level sensor 326 is used to monitor the liquid level of the cleaning liquid in the second gas-liquid separator 325, thereby enabling the filling valve 313 to be opened or closed.

[0064] In this embodiment, in the system, the design of the cleaning liquid filling pipeline 31 ensures that the cleaning liquid can be injected into the system in time and maintained at a suitable liquid level when needed through the cooperation of a series of sensors and valves. The cleaning liquid storage tank 311 is used to store the cleaning liquid required in the system, and the first liquid level sensor 312 is installed in the cleaning liquid storage tank 311 to monitor the cleaning liquid level in the storage tank in real time. When the liquid level is lower than the set value, the liquid level sensor will send a signal to trigger the external water supply pipeline or the internal standby water supply pipeline to replenish the cleaning liquid storage tank 311 to ensure that the cleaning liquid is always kept at an appropriate level. The output end of the cleaning liquid storage tank 311 is connected to the filling valve 313, and the cleaning liquid is transported to the cleaning liquid circulation system through the filling valve 313. The other end of the filling valve 313 is connected to the first fluid conduction end of the second gas-liquid separator 325 to ensure that the cleaning liquid can smoothly enter the gas-liquid separator. The second gas-liquid separator 325 is provided with a second liquid level sensor 326, which is used to monitor the cleaning liquid level in the gas-liquid separator. When the liquid level reaches the set value, the second liquid level sensor 326 controls the switch action of the filling valve 313 through electrical connection to ensure that the flow of the cleaning liquid is accurately adjusted to prevent too much or too little cleaning liquid from entering the system. This design logic ensures that the supply process of the cleaning liquid is automated and accurate. At the same time, through the coordinated work of the two-stage liquid level sensor, it can effectively prevent insufficient or excessive supply of the cleaning liquid, thereby improving the utilization efficiency of the cleaning liquid and ensuring the stable operation of the entire system.

[0065] To sum up, the cleaning liquid filling pipeline 31, through the configuration of the cleaning liquid storage tank 311, the liquid level sensor and the filling valve 313, can monitor the liquid level of the cleaning liquid storage tank 311 in real time and automatically replenish the cleaning liquid, thereby ensuring the timeliness and adequacy of the cleaning liquid supply, avoiding the weakening of the cleaning effect due to insufficient cleaning liquid during the cleaning process, and thus improving the continuity and stability of the cleaning process.

[0066] Furthermore, the cleaning liquid storage tank 311 is connected to the analysis tower 4 because the gas in the analysis tower 4 usually contains moisture, especially the steam generated during the analysis process. If the cleaning liquid storage tank 311 is connected to the analysis tower 4, these condensed waters can be recovered and stored in the cleaning liquid storage tank 311. This helps to reduce the dependence on external water sources in the cleaning system and achieve the purpose of saving water resources. The water-gas balance in the decarbonization system is very important. By connecting the cleaning liquid storage tank 311 to the analysis tower 4, the water-gas mixture in the analysis tower 4 can be recycled and recycled, thereby ensuring that the system always maintains a stable water-gas ratio under different operating conditions. After the cleaning liquid storage tank 311 is connected to the analysis tower 4, the recovered condensed water can be extracted from the analysis tower 4. After storage, these condensed waters can be used as cleaning water for cleaning boilers, further reducing water resource consumption, while also reducing system operating costs.

[0067] Further, such as Figure 2 As shown, the cleaning system of the amine heat exchange boiler in the ship decarbonization system also includes a discharge module 5, and the discharge module 5 includes a first recovery pipeline 51 and a second recovery pipeline 52, one end of the first recovery pipeline 51 is connected to the amine liquid circulation control module 2, and the other end of the first recovery pipeline 51 is connected to the decomposition tower 4, one end of the second recovery pipeline 52 is connected to the second end of the cleaning pump valve assembly 324, and the other end of the second recovery pipeline 52 is connected to the decomposition tower 4.

[0068] In this embodiment, the discharge module 5 of the ship decarbonization system realizes the recovery and reprocessing of excess liquid in the system through the combination of the first recovery pipeline 51 and the second recovery pipeline 52. One end of the first recovery pipeline 51 is connected to the amine liquid circulation control module 2, and the other end is connected to the analytical tower 4. The main function is to transport the amine liquid back to the analytical tower 4 through the pipeline during the amine liquid circulation process when the liquid in the pipeline needs to be discharged or recovered, so as to avoid the waste of liquid and ensure the normal operation of the amine liquid circulation system. The second recovery pipeline 52 is connected to the second end of the cleaning pump valve assembly 324 and is connected to the analytical tower 4. Its function is to recycle the cleaned waste liquid into the analytical tower 4 through the pipeline after the cleaning process is completed, so as to avoid the cleaning liquid remaining in the system and affecting the subsequent operation. Through these two recovery pipelines, the system can flexibly respond to different liquid recovery needs, not only can it discharge or recover the cleaning liquid or amine liquid in time, but also ensure that the fluid circulation inside the system is smooth, thereby maintaining the fluid balance of the entire system and ensuring the efficient operation of the decarbonization and cleaning process. At the same time, as the end point of liquid recovery, the analysis tower 4 not only undertakes the analysis function of the amine liquid, but also manages the discharge and recovery of waste liquid in the system through the discharge module 5 to ensure the continuous and stable operation of the system.

[0069] Furthermore, the first recovery pipeline 51 has a dedicated discharge valve, because it is mainly responsible for recovering the excess amine liquid in the amine liquid circulation control module 2, and the discharge of the amine liquid needs to be accurately controlled by the discharge valve to avoid the amine liquid being retained or wasted in the pipeline. The second recovery pipeline 52 is directly connected to the cleaning pump valve assembly 324, and its function is to transport the waste liquid after the cleaning cycle back to the analytical tower 4. Since the waste liquid treatment during the cleaning process is continuous and does not require precise flow control, there is no need for a dedicated discharge valve, and the system can complete the discharge and recovery of the waste liquid through natural reflux;

[0070] Similarly, the sewage needs to be returned to the analytical tower 4 in order to use the analytical tower 4 as a centralized treatment device, reduce the number of new treatment devices, and thus reduce the complexity and cost of the system. When the cleaning liquid is discharged through the discharge valve, it first enters the sewage separation device or a separate sewage treatment pipeline, and the sewage and amine liquid are effectively separated. The treated amine liquid can be returned to the analytical tower 4 for reuse to avoid waste and pollution. The sewage is introduced into the sewage treatment system through a separate pipeline for further treatment or discharge.

[0071] To sum up, the discharge module 5, through the setting of the first recovery pipeline 51 and the second recovery pipeline 52, can discharge the circulated cleaning liquid to the analysis tower 4 in time after the cleaning process is completed, so as to avoid the cleaning liquid remaining in the system pipeline and affecting the subsequent operation, and at the same time ensure the separation and recovery of the amine liquid and the cleaning liquid, thereby improving the operation safety and fluid management efficiency of the system.

[0072] like Figure 2-3As shown, a cleaning method based on a cleaning system of an amine heat exchange boiler in a ship decarbonization system is applied to a cleaning system of an amine heat exchange boiler in a ship decarbonization system, and the cleaning method comprises:

[0073] S10, if the decarbonization system stops running, only the second circulation pipeline 22 and the first circulation pipeline 21 in the amine liquid circulation control module 2 are controlled to be opened, the second circulation pipeline 22 is used to make the amine liquid in the heat exchange pipeline 11 automatically flow back to the desorption tower 4 by gravity, and the first circulation pipeline 21 is used to make the gas in the desorption tower 4 fill the heat exchange pipeline 11;

[0074] In this embodiment, the second circulation pipeline 22 refers to a valve group that controls the amine liquid in the heat exchange pipeline 11 to reflux to the analytical tower 4. When the decarbonization system stops running, the amine liquid in the heat exchange pipeline 11 automatically refluxes to the analytical tower 4 through the second circulation pipeline 22 under the action of gravity, thereby preventing the amine liquid from being detained for a long time in a high temperature environment and deteriorating. At the same time, the first circulation pipeline 21 is used to introduce the gas in the analytical tower 4 into the heat exchange pipeline 11 while the amine liquid refluxes, to ensure the pressure balance in the pipeline and prevent the occurrence of negative pressure in the pipeline. Such a design can not only ensure the safe reflux of the amine liquid, but also protect the heat exchange pipeline 11 from excessive pressure by filling with gas, thereby ensuring the stability of the system.

[0075] S20, obtaining the actual amine liquid content in the heat exchange pipeline 11, comparing the actual amine liquid content with the determined preset amine liquid content, if the actual amine liquid content is lower than the determined preset amine liquid content, controlling the filling valve 313 group in the boiler cleaning control module 3 to open, and controlling the second circulation pipeline 22 and the first circulation pipeline 21 to close, the filling valve 313 group is used to supply the corresponding current cleaning liquid content;

[0076] In this embodiment, the preset amine liquid content refers to the amount of amine liquid required for the system to work normally. When the actual amine liquid content is lower than the preset value, the system detects this through the liquid level sensor and automatically controls the filling valve 313 group to open. The function of the filling valve 313 group is to replenish the cleaning liquid from the storage tank or other cleaning liquid source, and to ensure that the cleaning liquid will not mix with the amine liquid or affect the transportation of the cleaning liquid due to gas reflux by closing the second circulation pipeline 22 and the first circulation pipeline 21. This process ensures that the heat exchange pipeline 11 can be completely filled with cleaning liquid before the cleaning operation begins, thereby providing a good foundation for the subsequent cleaning operation.

[0077] S30, obtaining the current cleaning liquid content in real time, comparing the current cleaning liquid content with the determined preset cleaning liquid content, if the current cleaning liquid content is higher than or equal to the determined first preset cleaning liquid content, controlling the filling valve 313 group to close, and opening the cleaning liquid circulation pipeline 32 in the boiler cleaning control module 3, the cleaning liquid circulation pipeline 32 is used to perform a cleaning cycle, and the cleaning cycle is used to clean the amine liquid adhered to the wall of the heat exchange pipeline 11;

[0078] In this embodiment, the cleaning liquid content is monitored by a cleaning liquid sensor. When it is detected that the current cleaning liquid content reaches or exceeds the preset cleaning liquid standard, the system automatically closes the filling valve 313 group to prevent excessive cleaning liquid from entering the system. At the same time, the cleaning liquid circulation pipeline 32 is opened, and the cleaning liquid begins to circulate in the system. The main purpose of the cleaning cycle is to remove the amine liquid residue adhering to the pipe wall by the flow of the cleaning liquid in the heat exchange pipeline 11. This process ensures that there will be no amine liquid residue in the pipeline, avoids affecting the subsequent heat exchange efficiency, and ensures the long-term stable operation of the system.

[0079] S40, when it is detected that the number of cycles of the cleaning cycle reaches a preset number, the discharge module 5 is controlled to be opened to discharge the cleaning liquid after the cycle, and when the discharge is completed, the discharge module 5 and the cleaning liquid circulation pipeline 32 are controlled to be closed;

[0080] In this embodiment, the number of cleaning cycles is determined by a preset value set by the system. When the number of cleaning cycles reaches the preset number, the system automatically opens the discharge module 5 to discharge the used cleaning liquid out of the system. After the drainage is completed, the discharge module 5 and the cleaning liquid circulation pipeline 32 are closed at the same time to ensure that no excess cleaning liquid remains in the heat exchange pipeline 11. This process can not only effectively remove impurities in the heat exchange pipeline, but also prevent the residual cleaning liquid from affecting the subsequent operation and maintenance of the pipeline.

[0081] S50. If the decarbonization system starts to run, only the second circulation pipeline 22 and the first circulation pipeline 21 are controlled to be opened, so that the amine liquid stored in the decomposition tower 4 after the decarbonization system stops running is transported to the heat exchange pipeline 11 through the second circulation pipeline 22 to perform the corresponding heating operation, thereby generating a vapor-liquid two-phase amine liquid, and the vapor-liquid two-phase amine liquid is circulated and transported to the decomposition tower 4 through the first circulation pipeline 21.

[0082] In this embodiment, the vapor-liquid two-phase amine liquid refers to a mixture of liquid and gaseous forms formed by heating the amine liquid when the decarbonization system is restarted. The amine liquid in the desorption tower 4 is transported to the heat exchange pipeline 11 for heating through the second circulation pipeline 22 to generate a vapor-liquid two-phase amine liquid, and this mixture is transported back to the desorption tower 4 through the first circulation pipeline 21. The generation and circulation of the vapor-liquid two-phase amine liquid can not only improve the utilization efficiency of the amine liquid, but also speed up the circulation speed of the amine liquid in the decarbonization process, improve the overall operating efficiency and energy-saving effect of the system, and ensure that the decarbonization task can be performed efficiently.

[0083] Furthermore, the second circulation pipeline 22 includes at least a first heat exchange valve 211, a first gas-liquid separator 212 and a breathable valve 213, the first circulation pipeline 21 includes at least a second heat exchange valve 221, a circulation bypass valve 222 and a heat exchange pump valve assembly 223, the cleaning liquid filling pipeline 31 includes at least a filling valve 313, and the cleaning liquid circulation pipeline 32 includes at least a first cleaning bypass valve 321, a second cleaning bypass valve 322, a jet pump 323, a cleaning pump valve assembly 324 and a second gas-liquid separator 325.

[0084] Specific principle introduction:

[0085] The system of the present invention includes the following four sub-processes:

[0086] 1) Boiler emptying: When the decarbonization system is not running, the heat exchange pump valve assembly 223 will be closed. At this time, there is amine liquid in the boiler, and the amine liquid needs to be emptied. Then the first heat exchange valve 211, the second heat exchange valve 221, the circulation bypass valve 222 and the breathable valve 213 are opened, and other valves are closed. At this time, the amine liquid in the boiler will be automatically discharged and emptied under the action of gravity, and the amine liquid will flow back to the desorption tower. After emptying, due to the suction effect of the amine liquid, the gas in the desorption tower will fill the space originally occupied by the amine liquid in the boiler.

[0087] 2) Filling of cleaning liquid: After the amine liquid in the boiler is emptied, the surface of the boiler heat exchange tube is adhered with amine liquid. At this time, cleaning is required. First, the filling valve 313 is opened, and the clean water in the cleaning liquid storage tank 311 will flow into the second gas-liquid separator 325. When the second liquid level sensor 326 detects that the specified liquid level has been reached, the filling valve 313 is closed, thereby completing the filling of cleaning water.

[0088] 3) Boiler cleaning: After the cleaning water is filled, the first cleaning bypass valve 321, the second cleaning bypass valve 322 and the cleaning pump valve assembly 324 are opened, and the others are closed. The cleaning pump valve assembly 324 is opened, and the clean water in the second gas-liquid separator 325 is sucked by the cleaning pump valve assembly 324 and pumped into the jet pump 323. Under the action of the jet pump 323. The clean water and the gas in the analysis tower 4 are mixed together and pumped into the boiler tube through the second cleaning bypass valve 322 to clean the boiler tube wall. The cleaned water passes through the first cleaning bypass valve 321 and returns to the second gas-liquid separator 325, and the second gas-liquid separator 325 separates the gas and liquid again. The water goes to clean the pump valve assembly 324 again. Thus, a cycle is completed. This reciprocating cycle is repeated for 5 times.

[0089] 4) Cleaning liquid draining: After the cleaning process is completed, the cleaning pump valve assembly 324 stops, the discharge valve of the first recovery pipeline 51 is opened, and the others are closed. At this time, the sewage in the cleaning pipeline, boiler pipe and second gas-liquid separator 325 will be drained into the desorption tower 4 through the discharge valve of the first recovery pipeline 51, and the boiler pipe has been drained. After the discharge is completed, the discharge valve of the first recovery pipeline 51 is closed.

[0090] 5) Repeat the cleaning process, repeat steps 2), 3) and 4) twice.

[0091] 6) Normal operation of the boiler and storage of cleaning liquid: After cleaning, the boiler tube is empty, the tube wall is clean and free of amine liquid, and high-temperature dry burning has no effect on the boiler. When the decarbonization system is operated again, the first heat exchange valve 211, the second heat exchange valve 221 and the heat exchange pump valve assembly 223 are opened, and the others are closed. At this time, the amine liquid is sucked from the analysis tower 4 by the heat exchange pump valve assembly 223 through the second heat exchange valve 221 to the boiler. The heated amine liquid is divided into vapor and liquid phases, and the vapor and liquid two-phase flow passes through the first heat exchange valve 211 to the first gas-liquid separator 212. Because the cleaning liquid standby pipeline 23 is closed, the high-temperature vapor and liquid two-phase flow will return to the analysis tower 4 again, thereby completing the heating and analysis process of the amine liquid.

[0092] 7) Storage and standby of cleaning liquid: When the low liquid level alarm is sounded in the cleaning liquid storage tank 311, the cooling valve 231 is opened, and the high-temperature water vapor is cooled into clean water after passing through the condenser 232 and injected into the cleaning liquid storage tank 311 until the high liquid level is reached, and the cooling valve 231 is closed, thereby completing the storage and standby of cleaning water.

[0093] In summary, through the amine liquid circulation control module 2 and the boiler cleaning control module 3, the method realizes the automatic reflux and cleaning of the amine liquid when the decarbonization system stops running, prevents the amine liquid from staying in the high-temperature pipeline for a long time and deteriorating, and ensures gas balance through the first circulation pipeline 21. The system automatically injects cleaning liquid according to the amine liquid content, and removes the amine liquid residue on the pipe wall through the cleaning cycle to avoid scaling and affecting the heat exchange efficiency. After the cleaning is completed, the cleaning liquid is discharged, and the system is ready to enter the next round of operation or cleaning. When the decarbonization system is restarted, the amine liquid is transported to the heat exchange pipeline 11 through the second circulation pipeline 22 and heated into a vapor-liquid two-phase mixture to continue the decarbonization task, thereby ensuring the efficient and stable operation of the system and preventing the amine liquid from deteriorating.

[0094] Technicians in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional pipelines and modules is used as an example. In actual applications, the above-mentioned functions can be distributed and completed by different functional pipelines and modules as needed, that is, the internal structure of the device is divided into different functional pipelines or modules to complete all or part of the functions described above.

[0095] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A cleaning system for an amine heat exchange boiler in a ship decarbonization system, characterized in that: A cleaning system for an amine heat exchange boiler in a ship decarbonization system comprises a boiler heat exchange module (1), an amine liquid circulation control module (2), a boiler cleaning control module (3) and a desorption tower (4). The boiler heat exchange module (1) is provided with a heat exchange chamber (12) connected to a flue gas pipeline, and a heat exchange pipeline (11) located in the heat exchange chamber (12). The heat exchange pipeline (11) and the desorption tower (4) are connected via the amine liquid circulation control module (2). The amine liquid circulation control module (2) is used, on the one hand, to control the amine liquid to reflux to the desorption tower (4) when the decarbonization system is shut down, and, on the other hand, to control the amine liquid to be delivered to the heat exchange pipeline (11) when the decarbonization system is running. The boiler cleaning control module (3) is connected to the heat exchange pipeline (11) to clean the amine liquid adhering to the wall of the heat exchange pipeline (11) after the amine liquid refluxes to the desorption tower (4).

2. The cleaning system for an amine heat exchange boiler in a ship decarbonization system according to claim 1, characterized in that: The amine liquid circulation control module (2) comprises a first circulation pipeline (21) and a second circulation pipeline (22); a first end of the heat exchange pipeline (11) is connected to one end of the first circulation pipeline (21), and the other end of the first circulation pipeline (21) is connected to the analytical tower (4); a second end of the heat exchange pipeline (11) is connected to one end of the second circulation pipeline (22), and the other end of the second circulation pipeline (22) is connected to the analytical tower (4); and a flow direction of the fluid in the first circulation pipeline (21) is opposite to a flow direction of the fluid in the second circulation pipeline (22).

3. The cleaning system for amine heat exchange boiler in a ship decarbonization system according to claim 2, characterized in that: The first circulation pipeline (21) comprises a first heat exchange valve (211), a first gas-liquid separator (212) and a breathable valve (213); one end of the first heat exchange valve (211) is connected to the heat exchange pipeline (11); the other end of the first heat exchange valve (211) is connected to a first fluid conducting end of the first gas-liquid separator (212); the second fluid conducting end of the first gas-liquid separator (212) is connected to a first end of the breathable valve (213); and the second end of the breathable valve (213) is connected to a desorption tower (4).

4. The cleaning system for amine heat exchange boiler in a ship decarbonization system according to claim 3, characterized in that: A cleaning liquid standby pipeline (23) is provided between the gas conducting end of the first gas-liquid separator (212) and the boiler cleaning control module (3), and the cleaning liquid standby pipeline (23) comprises a cooling valve (231) and a condenser (232), one end of the cooling valve (231) is connected to the gas conducting end of the first gas-liquid separator (212), the other end of the cooling valve (231) is connected to one end of the condenser (232), and the other end of the condenser (232) is connected to the boiler cleaning control module (3).

5. The cleaning system for amine heat exchange boiler in a ship decarbonization system according to claim 2, characterized in that: The second circulation pipeline (22) comprises a second heat exchange valve (221), a circulation bypass valve (222) and a heat exchange pump valve assembly (223); one end of the second heat exchange valve (221) is connected to the heat exchange pipeline (11); the other end of the second heat exchange valve (221) is connected to one end of the heat exchange pump valve assembly (223); the other end of the heat exchange pump valve assembly (223) is connected to the decomposition tower (4); the other end of the second heat exchange valve (221) is connected to one end of the circulation bypass valve (222); and the other end of the circulation bypass valve (222) is connected to the decomposition tower (4).

6. The cleaning system for amine heat exchange boiler in a ship decarbonization system according to claim 1, characterized in that: The boiler cleaning control module (3) comprises a cleaning liquid filling pipeline (31) and a cleaning liquid circulation pipeline (32); the first end of the heat exchange pipeline (11) is connected to the return end of the cleaning liquid circulation pipeline (32); the delivery end of the cleaning liquid circulation pipeline (32) is connected to the second end of the heat exchange pipeline (11); and the cleaning liquid output end of the cleaning liquid filling pipeline (31) is connected to the return end of the cleaning liquid circulation pipeline (32).

7. The cleaning system for amine heat exchange boiler in a ship decarbonization system according to claim 6, characterized in that: The cleaning liquid circulation pipeline (32) comprises a first cleaning bypass valve (321), a second cleaning bypass valve (322), a jet pump (323), a cleaning pump valve assembly (324) and a second gas-liquid separator (325), wherein one end of the first cleaning bypass valve (321) is connected to a first end of the heat exchange pipeline (11), the first cleaning bypass valve (321) is connected to a first fluid conducting end of the second gas-liquid separator (325), the second fluid conducting end of the second gas-liquid separator (325) is connected to one end of the cleaning pump valve assembly (324), and the cleaning pump valve assembly (324) is connected to a first end of the heat exchange pipeline (11). ) is connected to the first end of the jet pump (323), the second end of the jet pump (323) is connected to the first end of the second cleaning bypass valve (322), the second end of the second cleaning bypass valve (322) is connected to the second end of the heat exchange pipeline (11), a gas mixing pipeline is provided between the third end of the jet pump (323) and the analysis tower (4), the gas mixing pipeline is used to transport the gas in the analysis tower (4) to the jet pump (323) for mixing with the cleaning liquid, and the gas conducting end of the second gas-liquid separator (325) is connected to the gas mixing pipeline.

8. The cleaning system for amine heat exchange boiler in a ship decarbonization system according to claim 7, characterized in that: The cleaning liquid filling pipeline (31) comprises a cleaning liquid storage tank (311), a first liquid level sensor (312) and a filling valve (313); the first liquid level sensor (312) is used to monitor the liquid level of the cleaning liquid in the cleaning liquid storage tank (311), thereby enabling an external water supply pipeline or an internal standby water supply pipeline to supply water; the output end of the cleaning liquid storage tank (311) is connected to one end of the filling valve (313); the other end of the filling valve (313) is connected to a first fluid conducting end of the second gas-liquid separator (325); the second gas-liquid separator (325) is provided with a second liquid level sensor (326) electrically connected to the filling valve (313); the second liquid level sensor (326) is used to monitor the liquid level of the cleaning liquid in the second gas-liquid separator (325), thereby enabling the filling valve (313) to be opened or closed.

9. The cleaning system for amine heat exchange boiler in a ship decarbonization system according to claim 7, characterized in that: The cleaning system for an amine heat exchange boiler in a ship decarbonization system further comprises a discharge module (5), wherein the discharge module (5) comprises a first recovery pipeline (51) and a second recovery pipeline (52), wherein one end of the first recovery pipeline (51) is connected to the second end of the cleaning pump valve assembly (324), and the other end of the first recovery pipeline (51) is connected to the desorption tower (4), one end of the second recovery pipeline (52) is connected to the amine liquid circulation control module (2), and the other end of the second recovery pipeline (52) is connected to the desorption tower (4).

10. A cleaning method based on a cleaning system for an amine heat exchange boiler in a ship decarbonization system, applied to a cleaning system for an amine heat exchange boiler in a ship decarbonization system as claimed in any one of claims 1 to 9, characterized in that: The cleaning method comprises: If the decarbonization system stops running, only the second circulation pipeline (22) and the first circulation pipeline (21) in the amine liquid circulation control module are controlled to be opened, the second circulation pipeline (22) is used to allow the amine liquid in the heat exchange pipeline to automatically flow back to the desorption tower by gravity, the first circulation pipeline (21) is used to allow the gas in the desorption tower to be filled into the heat exchange pipeline, the first circulation pipeline (21) at least includes a first heat exchange valve (211), a first gas-liquid separator (212) and a breathable valve (213), and the second circulation pipeline (22) at least includes a second heat exchange valve (221), a circulation bypass valve (222) and a heat exchange pump valve assembly (223); Acquiring the actual amine liquid content in the heat exchange pipeline, comparing the actual amine liquid content with a predetermined preset amine liquid content, and if the actual amine liquid content is lower than the predetermined preset amine liquid content, controlling the cleaning liquid filling pipeline (31) in the boiler cleaning control module to open, and controlling the second circulation pipeline (22) and the first circulation pipeline (21) to close, the cleaning liquid filling pipeline (31) being used to supply the corresponding current cleaning liquid content, and the cleaning liquid filling pipeline (31) at least comprising a filling valve (313); obtaining the current cleaning liquid content in real time, comparing the current cleaning liquid content with a determined preset cleaning liquid content, and if the current cleaning liquid content is higher than or equal to the determined first preset cleaning liquid content, controlling the cleaning liquid filling pipeline (31) to be closed, and opening the cleaning liquid circulation pipeline (32) in the boiler cleaning control module, wherein the cleaning liquid circulation pipeline (32) is used to perform a cleaning cycle, wherein the cleaning cycle is used to clean the amine liquid adhered to the wall of the heat exchange pipeline, and the cleaning liquid circulation pipeline (32) at least includes a first cleaning bypass valve (321), a second cleaning bypass valve (322), a jet pump (323), a cleaning pump valve assembly (324), and a second gas-liquid separator (325); When it is detected that the number of cycles of the cleaning cycle reaches a preset number, the discharge module (5) is controlled to open to discharge the cleaning liquid after the cycle, and when the discharge is completed, the discharge module (5) and the cleaning liquid circulation pipeline (32) are controlled to close; If the decarbonization system starts to operate, only the second circulation pipeline (22) and the first circulation pipeline (21) are controlled to be opened, so that the amine liquid stored in the decomposition tower after the decarbonization system stops operating is transported to the heat exchange pipeline through the second circulation pipeline (22) to perform the corresponding heating operation, thereby generating a vapor-liquid two-phase amine liquid, and the vapor-liquid two-phase amine liquid is circulated and transported to the decomposition tower through the first circulation pipeline (21).

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