Decarburization device

Abstract

The utility model provides a decarburization device which comprises a washing tower, a regeneration tower and a first pump body, the regeneration tower is communicated with the washing tower through a forward communicating pipeline, and the first pump body is arranged on the forward communicating pipeline; the forward-stroke communicating pipeline selectively communicates with the communicating branch or the maintaining branch, and one end of the communicating branch and one end of the maintaining branch are arranged on the side, located on the first pump body, of the forward-stroke communicating pipeline in a spaced mode. The other end of the communication branch and the other end of the maintenance branch are arranged on the other side, located on the first pump body, of the forward stroke communication pipeline in a spaced mode. The first valve is arranged on the communication branch, the second valve is arranged on the maintenance branch, and the maximum opening degree of the first valve is smaller than that of the second valve. According to the technical scheme provided by the utility model, the technical problem that the amine liquid flow cannot be effectively adjusted in the prior art can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of decarburization devices, in particular to a decarburization device. Background Art

[0002] At present, in the process of amine decarbonization, in order to recycle the pressure energy in the high-pressure amine liquid, a turbine pump is usually installed on the outflow path of the high-pressure amine liquid to recover energy, and the turbine pump is used to drive the semi-lean liquid pump to provide power for the pressurization of the semi-lean liquid.

[0003] However, the flow rate of amine liquid often fluctuates greatly during its flow process. In the prior art, the flow rate of amine liquid is often not effectively regulated, which will cause the flow rate fluctuation of amine liquid to lead to unstable operation of turbine pump, affect the normal operation of flow path, and further affect the normal operation of decarbonization equipment. Utility Model Content

[0004] The main purpose of the utility model is to provide a decarbonization device to solve the technical problem that the flow rate of the amine liquid cannot be effectively adjusted in the prior art.

[0005] In order to achieve the above object, the utility model provides a decarbonization device, comprising:

[0006] The washing tower, the regeneration tower and the first pump body are connected to the washing tower through a forward connecting pipeline, and the first pump body is arranged on the forward connecting pipeline;

[0007] A connecting branch and a maintenance branch, the outbound connecting pipeline can be selectively connected to the connecting branch or the maintenance branch, one end of the connecting branch and one end of the maintenance branch are arranged at intervals on one side of the outbound connecting pipeline located at the first pump body, and the other end of the connecting branch and the other end of the maintenance branch are arranged at intervals on the other side of the outbound connecting pipeline located at the first pump body;

[0008] The first valve and the second valve are arranged on the communication branch line, and the second valve is arranged on the maintenance branch line. The maximum opening of the first valve is smaller than the maximum opening of the second valve.

[0009] Further, the opening of the first valve is adjustable to adjust the liquid flow of the connecting branch; and / or,

[0010] The opening degree of the second valve can be adjusted to adjust the liquid flow of the maintenance branch line.

[0011] Furthermore, the decarbonization device also includes:

[0012] A liquid level detection component is arranged on the washing tower, the liquid level detection component is located at the bottom of the washing tower, and the liquid level detection component is used to detect the liquid level in the washing tower;

[0013] Wherein, the first valve and / or the second valve is connected to the liquid level detection element.

[0014] Furthermore, the decarbonization device also includes:

[0015] A first return connecting pipeline and a second pump body, wherein both ends of the first return connecting pipeline are connected to the regeneration tower and the washing tower respectively; the second pump body is arranged on the first return connecting pipeline, and the first pump body is drivingly connected to the second pump body;

[0016] An auxiliary branch and a third pump body, wherein two ends of the auxiliary branch are respectively connected to one side of the first return connecting pipeline located at the second pump body and the other side of the first return connecting pipeline located at the second pump body, and the third pump body is an electric drive pump;

[0017] At least one of the second pump body and the third pump body is in operation.

[0018] Further, the first pump body is a turbine pump; and / or,

[0019] The second pump body is a booster pump.

[0020] Further, the inlet of the first pump body is provided with a first shut-off valve, and the outlet of the first pump body is provided with a second shut-off valve; and / or,

[0021] The outlet of the first pump body is provided with a safety valve.

[0022] Furthermore, the washing tower includes an upper washing tower and a lower washing tower which are connected to each other, and the regeneration tower includes an upper regeneration tower and a lower regeneration tower which are connected to each other; one end of the outgoing connecting pipeline is connected to the lower washing tower, and the other end of the outgoing connecting pipeline is connected to the upper regeneration tower;

[0023] One end of the first return connecting pipeline is connected to the regeneration upper tower, and the other end of the first return connecting pipeline is connected to the washing lower tower.

[0024] Furthermore, the decarbonization device also includes:

[0025] A regeneration branch, one end of the regeneration branch and the other end of the regeneration branch are both connected to the regeneration tower, and one end of the regeneration branch is located above the other end of the regeneration branch;

[0026] A second return connecting pipeline, one end of which is connected to the bottom of the regeneration tower, and the other end of which is connected to the upper part of the washing tower;

[0027] The heat exchange structure comprises a first heat exchange passage and a second heat exchange passage which are separated from each other. The first heat exchange passage is connected with the regeneration branch, and the second heat exchange passage is connected with the second return connecting pipeline.

[0028] Furthermore, the washing tower includes an upper washing tower and a lower washing tower which are connected to each other, and the regeneration tower includes an upper regeneration tower and a lower regeneration tower which are connected to each other; and the decarbonization device also includes:

[0029] A regeneration branch, one end of which is connected to the bottom of the upper regeneration tower, and the other end of which is connected to the top of the lower regeneration tower;

[0030] A second return connecting pipeline, one end of which is connected to the bottom of the regeneration lower tower, and the other end of which is connected to the top of the washing upper tower;

[0031] The heat exchange structure comprises a first heat exchange passage and a second heat exchange passage which are separated from each other. The first heat exchange passage is connected with the regeneration branch, and the second heat exchange passage is connected with the second return connecting pipeline.

[0032] Furthermore, the decarbonization device further comprises a first return connecting pipeline, and both ends of the first return connecting pipeline are respectively connected to the regeneration tower and the washing tower;

[0033] Wherein, a first liquid outlet is provided at the bottom of the washing lower tower, a first liquid inlet is provided at the top of the regeneration upper tower, the liquid inlet of the outgoing connecting pipeline is connected to the first liquid outlet, and the liquid outlet of the outgoing connecting pipeline is connected to the first liquid inlet; and / or,

[0034] A second liquid inlet is provided at the top of the washing lower tower, a second liquid outlet is provided at the bottom of the regeneration upper tower, the liquid inlet of the first return connecting pipeline is connected to the second liquid outlet, and the liquid outlet of the first return connecting pipeline is connected to the second liquid inlet; and / or,

[0035] A third liquid outlet is arranged at the bottom of the regeneration lower tower, a third liquid inlet is arranged at the top of the washing upper tower, the liquid inlet of the second return connecting pipeline is connected to the third liquid outlet, and the liquid outlet of the second return connecting pipeline is connected to the third liquid inlet.

[0036] By applying the technical solution of the utility model, the flow rate regulation effect in the pipeline can be enhanced by setting the connecting branch, the maintenance branch, the first valve and the second valve. When the first pump body is working normally, the liquid flow rate flowing into the first pump body can be kept stable by slightly adjusting the first valve through the joint operation of the first pump body and the first valve on the connecting branch; when the first pump body stops running, the normal operation of the device can be ensured through the maintenance branch, and the liquid flow rate can be adjusted by controlling the opening of the second valve to ensure the stable operation of the device and effectively ensure the flow rate regulation effect. Therefore, the decarbonization device provided by this embodiment can solve the technical problem that the amine liquid flow rate cannot be effectively regulated in the prior art. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] The drawings constituting part of the present application are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

[0038] Figure 1 The overall structural schematic diagram of the decarbonization device provided according to the embodiment of the utility model is shown;

[0039] Figure 2 Shows Figure 1 An enlarged schematic diagram of the connecting branch and maintenance branch.

[0040] The above drawings include the following reference numerals:

[0041] 1. Washing tower; 101. Upper washing tower; 1011. Third liquid inlet; 1012. First gas outlet; 102. Lower washing tower; 1021. First liquid outlet; 1022. Second liquid inlet; 1023. First gas inlet;

[0042] 2. Regeneration tower; 201. Regeneration upper tower; 2011. First liquid inlet; 2012. Second liquid outlet; 2013. Second gas outlet; 202. Regeneration lower tower; 2021. Third liquid outlet;

[0043] 3. First pump body; 4. Outward connecting pipeline; 5. Connecting branch; 6. Maintenance branch; 7. First valve; 8. Second valve; 9. Liquid level detection component; 10. First return connecting pipeline; 111. Second pump body; 112. Third pump body; 12. Auxiliary branch; 13. First shut-off valve; 14. Second shut-off valve; 15. Safety valve; 16. Regeneration branch; 17. Second return connecting pipeline; 18. Heat exchange structure; 19. Flash tank; 20. Stripping branch; 21. Reboiler; 22. Fourth pump body; 23. Fifth pump body. DETAILED DESCRIPTION

[0044] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present utility model will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0045] like Figure 1 to Figure 2As shown, an embodiment of the utility model provides a decarbonization device, which includes a washing tower 1, a regeneration tower 2 and a first pump body 3. The regeneration tower 2 and the washing tower 1 are connected through a forward connecting pipe 4, and the first pump body 3 is arranged on the forward connecting pipe 4. The decarbonization device also includes a connecting branch 5 and a maintenance branch 6. The forward connecting pipe 4 can be selectively connected with the connecting branch 5 or the maintenance branch 6. One end of the connecting branch 5 and one end of the maintenance branch 6 are arranged at intervals on one side of the forward connecting pipe 4 located at the first pump body 3, and the other end of the connecting branch 5 and the other end of the maintenance branch 6 are arranged at intervals on the other side of the forward connecting pipe 4 located at the first pump body 3. The decarbonization device also includes a first valve 7 and a second valve 8. The first valve 7 is arranged on the connecting branch 5, and the second valve 8 is arranged on the maintenance branch 6. The maximum opening of the first valve 7 is smaller than the maximum opening of the second valve 8.

[0046] The decarbonization device provided by the embodiment of the utility model can enhance the regulating effect of the flow in the pipeline by setting the connecting branch 5, the maintenance branch 6, the first valve 7 and the second valve 8. When the first pump body 3 works normally, the first valve 7 on the connecting branch 5 can be used together to make the liquid flow into the first pump body 3 stable by slightly adjusting the first valve 7; when the first pump body 3 stops running, the normal operation of the device can be ensured by the maintenance branch 6, and the liquid flow can be adjusted by controlling the opening of the second valve 8 to ensure the stable operation of the device and effectively ensure the flow regulation effect. Therefore, the decarbonization device provided by this embodiment can solve the technical problem that the amine liquid flow cannot be effectively regulated in the prior art.

[0047] In addition, when the first pump body 3 is working normally, the flow rate is required to be relatively high, and generally a relatively stable flow rate is required; when the first pump body 3 stops working, the maintenance branch 6 is working normally. At this time, since the operation of the first pump body 3 is not required, there is no need to have a relatively strict requirement on the flow rate, and the flow rate of the liquid in the pipeline will not affect the first pump body 3. The setting of the maximum opening of the first valve 7 being smaller than the maximum opening of the second valve 8 can just meet the above requirements.

[0048] It should be noted that the first valve 7 can be a constant flow switch valve or a flow-adjustable valve, and the second valve 8 can be a constant flow switch valve or a flow-adjustable valve. When the first valve 7 is a constant flow switch valve, the maximum opening of the first valve 7 is the flow rate when the first valve 7 is in the open state; when the first valve 7 is a flow-adjustable valve, the maximum opening of the first valve 7 corresponds to the situation where the first valve 7 is adjusted to the maximum opening. When the second valve 8 is a constant flow switch valve, the maximum opening of the second valve 8 is the flow rate when the second valve 8 is in the open state; when the second valve 8 is a flow-adjustable valve, the maximum opening of the second valve 8 corresponds to the situation where the second valve 8 is adjusted to the maximum opening.

[0049] Specifically, the opening of the first valve 7 is adjustable to adjust the liquid flow of the connecting branch 5. In this way, the opening of the first valve 7 can be adjusted according to the change of the liquid level in the washing tower 1, so that the flow into the first pump body 3 is stable.

[0050] Specifically, the opening of the second valve 8 is adjustable to adjust the liquid flow of the maintenance branch 6. In this way, the opening of the second valve 8 can be adjusted according to the change of the liquid level in the washing tower 1, thereby controlling the flow in the outgoing connecting pipeline 4.

[0051] Specifically, the decarbonization device further includes a liquid level detection member 9, which is arranged on the washing tower 1 and located at the bottom of the washing tower 1. The liquid level detection member 9 is used to detect the liquid level in the washing tower 1. The first valve 7 and / or the second valve 8 are connected to the liquid level detection member 9. With such a structural arrangement, the liquid level in the washing tower 1 can be detected by the liquid level detection member 9, which is convenient for adjusting the opening of the first valve 7 and the second valve 8 based on the liquid level detection member 9, thereby effectively maintaining the flow rate in the pipeline stable.

[0052] Specifically, the decarbonization device further includes a first return connecting pipeline 10 and a second pump body 111, and the two ends of the first return connecting pipeline 10 are connected to the regeneration tower 2 and the washing tower 1 respectively; the second pump body 111 is arranged on the first return connecting pipeline 10, and the first pump body 3 is connected to the second pump body 111 by driving. The decarbonization device also includes an auxiliary branch 12 and a third pump body 112, and the two ends of the auxiliary branch 12 are respectively connected to one side of the first return connecting pipeline 10 located at the second pump body 111 and the other side of the first return connecting pipeline 10 located at the second pump body 111, and the third pump body 112 is an electric drive pump. Among them, at least one of the second pump body 111 and the third pump body 112 is in operation. With such a structural arrangement, the liquid in the first return connecting pipeline 10 can be pressurized and transported through the second pump body 111 and the third pump body 112 at the same time, so that when one of the pump bodies fails, the other pump body can maintain the normal operation of the first return connecting pipeline 10. And because the driving mode adopted by the third pump body 112 is different from that adopted by the second pump body 111, it is possible to ensure that at least one of the third pump body 112 and the second pump body 111 is in a normal operating state, thereby ensuring the stability of the operation of the entire device.

[0053] In order to better recover the pressure energy in the high-pressure liquid, the first pump body 3 is a turbine pump.

[0054] Specifically, the second pump body 111 is a booster pump, so that it can be better connected with the first pump body 3 to make full use of the power provided by the first pump body 3.

[0055] Specifically, the second pump body 111 may be configured as a coaxial booster pump.

[0056] In order to facilitate the inspection and maintenance of the first pump body 3 , a first shut-off valve 13 is provided at the inlet of the first pump body 3 , and a second shut-off valve 14 is provided at the outlet of the first pump body 3 .

[0057] Specifically, a safety valve 15 is provided at the outlet of the first pump body 3 , so as to provide overpressure protection for the first pump body 3 in case of sealing failure.

[0058] Specifically, the washing tower 1 includes an upper washing tower 101 and a lower washing tower 102 which are connected, and the regeneration tower 2 includes an upper regeneration tower 201 and a lower regeneration tower 202 which are connected; one end of the outgoing connecting pipeline 4 is connected to the lower washing tower 102, and the other end of the outgoing connecting pipeline 4 is connected to the upper regeneration tower 201. One end of the first return connecting pipeline 10 is connected to the upper regeneration tower 201, and the other end of the first return connecting pipeline 10 is connected to the lower washing tower 102. With such a structural arrangement, CO can be removed by the upper washing tower 101 and the lower washing tower 102. 2 (carbon dioxide) is adsorbed and removed, and the circulating liquid is regenerated by regenerating the upper tower 201 and the lower tower 202, which effectively improves the decarbonization effect and ensures the removal of CO 2 Depth removal.

[0059] Specifically, the washing upper tower 101 is located above the washing lower tower 102. The regeneration upper tower 201 is located above the regeneration lower tower 202.

[0060] In this embodiment, the decarbonization device further includes a regeneration branch 16, a second return connecting pipe 17 and a heat exchange structure 18. One end of the regeneration branch 16 and the other end of the regeneration branch 16 are both connected to the regeneration tower 2, and one end of the regeneration branch 16 is located above the other end of the regeneration branch 16. One end of the second return connecting pipe 17 is connected to the bottom of the regeneration tower 2, and the other end of the second return connecting pipe 17 is connected to the upper part of the washing tower 1. The heat exchange structure 18 has a first heat exchange passage and a second heat exchange passage that are separated. The fluid in the first heat exchange passage is used to exchange heat with the fluid in the second heat exchange passage. The first heat exchange passage is connected to the regeneration branch 16, and the second heat exchange passage is connected to the second return connecting pipe 17. With such a structural arrangement, a part of the semi-lean liquid generated by the regeneration tower 2 can be returned to the regeneration tower 2 through the regeneration branch 16 to further generate lean liquid for better decarbonization. At the same time, the setting of the heat exchange structure 18 can utilize the heat of the lean liquid in the second return connecting pipeline 17 to heat the semi-lean liquid in the regeneration branch 16, thereby improving the regeneration efficiency and making effective use of the heat.

[0061] Specifically, the washing tower 1 includes an upper washing tower 101 and a lower washing tower 102 which are connected, and the regeneration tower 2 includes an upper regeneration tower 201 and a lower regeneration tower 202 which are connected; the decarbonization device also includes a regeneration branch 16, a second return connecting pipe 17 and a heat exchange structure 18, one end of the regeneration branch 16 is connected to the bottom of the upper regeneration tower 201, and the other end of the regeneration branch 16 is connected to the top of the lower regeneration tower 202. One end of the second return connecting pipe 17 is connected to the bottom of the lower regeneration tower 202, and the other end of the second return connecting pipe 17 is connected to the top of the upper washing tower 101. The heat exchange structure 18 has a first heat exchange passage and a second heat exchange passage which are separated, the first heat exchange passage is connected to the regeneration branch 16, and the second heat exchange passage is connected to the second return connecting pipe 17. With such a structural arrangement, a part of the semi-lean liquid generated in the upper regeneration tower 201 can be returned to the lower regeneration tower 202 through the regeneration branch 16 to further generate lean liquid for better decarbonization. At the same time, the setting of the heat exchange structure 18 can utilize the heat of the lean liquid in the second return connecting pipeline 17 to heat the semi-lean liquid in the regeneration branch 16, thereby improving the regeneration efficiency and avoiding heat waste.

[0062] Specifically, the first heat exchange component that forms the first heat exchange path is in direct contact with the second heat exchange component that forms the second heat exchange path. Alternatively, the first heat exchange component that forms the first heat exchange path and the second heat exchange component that forms the second heat exchange path exchange heat through a heat exchange medium such as air. Specifically, the first heat exchange component and the second heat exchange component may include, but are not limited to, structures such as heat exchange pipes.

[0063] In this embodiment, the decarbonization device further includes a first return connecting pipeline 10, and the two ends of the first return connecting pipeline 10 are respectively connected to the regeneration tower 2 and the washing tower 1. Among them, the bottom of the washing lower tower 102 is provided with a first liquid outlet 1021, the top of the regeneration upper tower 201 is provided with a first liquid inlet 2011, the liquid inlet of the outgoing connecting pipeline 4 is connected to the first liquid outlet 1021, and the liquid outlet of the outgoing connecting pipeline 4 is connected to the first liquid inlet 2011. With such a structural arrangement, the amine liquid generated by the washing lower tower 102 can flow into the regeneration upper tower 201.

[0064] Specifically, the top of the washing lower tower 102 is provided with a second liquid inlet 1022, the bottom of the regeneration upper tower 201 is provided with a second liquid outlet 2012, the liquid inlet of the first return connecting pipeline 10 is connected to the second liquid outlet 2012, and the liquid outlet of the first return connecting pipeline 10 is connected to the second liquid inlet 1022. With such a structural arrangement, the semi-lean liquid produced by the regeneration upper tower 201 can flow into the washing lower tower 102.

[0065] Specifically, a third liquid outlet 2021 is provided at the bottom of the regeneration lower tower 202, a third liquid inlet 1011 is provided at the top of the washing upper tower 101, a liquid inlet of the second return connecting pipeline 17 is connected to the third liquid outlet 2021, and a liquid outlet of the second return connecting pipeline 17 is connected to the third liquid inlet 1011. With such a structural arrangement, the lean liquid produced by the regeneration lower tower 202 can flow into the washing upper tower 101.

[0066] In order to separate the flash gas of hydrocarbons in the amine liquid, the decarbonization device further comprises a flash tank 19 , which is arranged on the side of the outgoing connecting pipeline 4 at the first pump body 3 away from the washing tower 1 .

[0067] Specifically, the decarbonization device further includes a stripping branch 20 and a reboiler 21, and the two ends of the stripping branch 20 are arranged at intervals on the regeneration lower tower 202. The reboiler 21 is arranged on the stripping branch 20 and is used to heat the vaporized amine liquid. In this way, the acid gas stripped out of the regeneration lower tower 202 can enter the regeneration upper tower 201 from the top of the regeneration lower tower 202 and be discharged from the regeneration upper tower 201.

[0068] Specifically, the decarbonization device further includes a fourth pump body 22, which is disposed on the second return connecting pipeline 17, so that the lean liquid can be pressurized and transported.

[0069] Specifically, the decarbonization device further includes a fifth pump body 23 , which is disposed on the regeneration branch 16 , so that the semi-lean liquid in the regeneration branch 16 can be pressurized and transported.

[0070] Specifically, the lower washing tower 102 is provided with a first air inlet 1023 for introducing the gas to be purified.

[0071] Specifically, the upper washing tower 101 is provided with a first gas outlet 1012 for discharging the purified gas.

[0072] Specifically, a second gas outlet 2013 is provided at the top of the regeneration upper tower 201 for discharging the acid gas stripped out by the regeneration lower tower 202 .

[0073] Specifically, the specific process of decarbonization of the decarbonization device is as follows:

[0074] The decarbonization device adopts amine decarbonization, a four-tower process, two towers for washing, and two towers for regeneration. The washing is high-pressure (usually 2.5-5.5MPa) to wash and remove CO 2 , regeneration is low-pressure regeneration solvent, washing tower 1 is an integrated design of upper and lower towers, and regeneration tower 2 is an integrated design of upper and lower towers.

[0075] Taking the working pressure of washing tower 1 as 5.5MPa as an example, double amine liquid is used for circulating washing. The amine liquid contacts with high carbon-containing raw gas in washing tower 1. The first amine liquid is semi-lean amine liquid, which is pressurized to 5.7MPa and the temperature is about 70℃ by the coaxial booster pump. It contacts with high carbon gas in the washing tower 102 to remove most of the CO in the raw gas. 2 , at this time, CO in the gas 2 The removal control index is within 3%. The second stream of amine liquid is a completely regenerated lean amine liquid, which is pressurized to 50°C and 5.9MPa by the lean amine liquid pump (equivalent to the fourth pump body 22) and enters the upper washing tower 101 to continue to contact with the raw gas from the lower washing tower 102 to remove the remaining CO in the raw gas. 2 When the pressure drops below 20 ppmv, the second amine solution completes washing and enters the lower washing tower 102 to merge with the first amine solution.

[0076] The high-pressure amine liquid from the scrubbing tower 1 is depressurized to about 0.6 MPa and then enters the flash tank 19, where the hydrocarbon flash gas is separated. The amine liquid is then further depressurized to about 0.05 MPa.G and enters the regeneration upper tower 201 for CO 2 Analysis: The acid gas from the regeneration lower tower 202 enters from the bottom of the upper tower as stripping gas and comes out from the regeneration upper tower 201. A cooling reflux device is set at the top of the tower. The regeneration upper tower 201 separates the CO-rich 2 Acid gas; most of the semi-lean amine liquid coming out of the bottom of the regeneration upper tower 201 is pressurized and cooled by the second pump body 111 and then enters the washing lower tower 102 for circulation. A small part of the semi-lean liquid is pressurized to about 0.05MPa.G, and is heat exchanged with the lean liquid regenerated from the bottom of the regeneration lower tower 202 to about 100°C, and then enters from the upper part of the regeneration lower tower 202. The reboiler 21 is provided at the bottom of the regeneration lower tower 202 for heating and stripping facilities. The acid gas stripped from the regeneration lower tower 202 enters the regeneration upper tower 201 from the top of the regeneration lower tower 202. The regenerated amine liquid is pressurized from the bottom of the regeneration lower tower 202 through heat exchange and the lean amine liquid pump, and then enters the washing upper tower 101 for circulation.

[0077] The pressure of the rich amine liquid coming out of the lower washing tower 102 is high, about 5.5MPa. The regeneration pressure condition of the rich amine liquid is below 0.05MPaG. The amine liquid turbine pump (equivalent to the first pump body 3) is used to recover this part of the pressure energy and use it for the second pump body 111 to increase the pressure, which can reduce the load of the third pump body 112. According to calculations, more than 50% of the total energy consumption of the semi-lean liquid circulation pump can be saved. The first pump body 3 is equipped with an energy stable recovery facility. The first pump body 3 is equipped with an inlet cut-off valve (equivalent to the first cut-off valve 13) and an outlet cut-off valve (equivalent to the second cut-off valve 14) as parking protection; the outlet of the first pump body 3 is also equipped with a safety valve 15 for overpressure protection of the turbine pump seal failure. A small flow regulating valve (equivalent to the first valve 7) is set in the bypass to ensure the stability of the turbine pump flow and the stable energy recovery facility. A large flow regulating valve (equivalent to the second valve 8) is set in another bypass, which is enabled when the turbine pump group is overhauled to ensure the operation of the device. The small flow regulating valve works simultaneously with the first pump body 3. The flow fluctuation at the bottom of the washing tower 1 is slightly controlled and adjusted by the small flow regulating valve. When the liquid level at the bottom of the washing tower 1 is higher than the set value, the valve opening increases, and vice versa, the valve opening decreases to ensure that the flow entering the first pump body 3 is stable. The large flow regulating valve is used to ensure the operation of the device when the first pump body 3 is overhauled or stopped. When the first pump body 3 is working, the valve is closed.

[0078] From the above description, it can be seen that the above embodiments of the utility model achieve the following technical effects:

[0079] 1) The four-tower process is adopted, two towers are used for washing, and two towers are used for regeneration, which can effectively 2 CO in industrial gases with a content of 10%-50% 2 Escape, can achieve CO 2 Deep escape, escape from CO 2 CO in the purified gas 2 The content can be as low as 20ppmv, which can meet the requirements of high CO 2 Deep removal of CO from industrial gas 2 Process requirements;

[0080] 2) The recovered pressure energy can reach more than 50% of the total energy consumption required for pressurization of the semi-lean liquid circulation system, saving production electricity consumption. At the same time, the energy recovery system can provide guarantee for the safe and stable operation of the energy recovery pump group.

[0081] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, it indicates the presence of features, steps, operations, devices, components and / or combinations thereof.

[0082] Unless otherwise specifically stated, the relative arrangement, numerical expressions and numerical values ​​of the parts and steps set forth in these embodiments do not limit the scope of the application. Meanwhile, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as a part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters represent similar items in the following drawings, and therefore, once a certain item is defined in an accompanying drawing, it does not need to be further discussed in subsequent drawings.

[0083] In the description of the present application, it should be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction, and therefore cannot be understood as limiting the scope of protection of the present application; the directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0084] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0085] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of this application.

[0086] The above description is only the preferred embodiment of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A decarbonization device, characterized in that: include: A washing tower (1), a regeneration tower (2) and a first pump body (3), wherein the regeneration tower (2) and the washing tower (1) are connected via a forward connecting pipe (4), and the first pump body (3) is arranged on the forward connecting pipe (4); a connecting branch (5) and a maintenance branch (6), wherein the outbound connecting pipeline (4) can be selectively connected to the connecting branch (5) or the maintenance branch (6), one end of the connecting branch (5) and one end of the maintenance branch (6) are arranged at intervals on one side of the outbound connecting pipeline (4) located at the first pump body (3), and the other end of the connecting branch (5) and the other end of the maintenance branch (6) are arranged at intervals on the other side of the outbound connecting pipeline (4) located at the first pump body (3); A first valve (7) and a second valve (8), wherein the first valve (7) is arranged on the connecting branch (5), and the second valve (8) is arranged on the maintenance branch (6), and the maximum opening of the first valve (7) is smaller than the maximum opening of the second valve (8).

2. The decarbonization device according to claim 1, characterized in that: The opening degree of the first valve (7) is adjustable to adjust the liquid flow rate of the communication branch (5); and / or, The opening degree of the second valve (8) is adjustable to adjust the liquid flow of the maintenance branch (6).

3. The decarbonization device according to claim 1, characterized in that: The decarbonization device also includes: A liquid level detection component (9) is arranged on the washing tower (1), the liquid level detection component (9) is located at the bottom of the washing tower (1), and the liquid level detection component (9) is used to detect the liquid level in the washing tower (1); Wherein, the first valve (7) and / or the second valve (8) are connected to the liquid level detection element (9).

4. The decarbonization device according to claim 1, characterized in that: The decarbonization device also includes: A first return connecting pipeline (10) and a second pump body (111), wherein both ends of the first return connecting pipeline (10) are respectively connected to the regeneration tower (2) and the washing tower (1); the second pump body (111) is arranged on the first return connecting pipeline (10), and the first pump body (3) is drivingly connected to the second pump body (111); an auxiliary branch (12) and a third pump body (112), wherein two ends of the auxiliary branch (12) are respectively connected to one side of the first return connecting pipeline (10) located on the second pump body (111) and the other side of the first return connecting pipeline (10) located on the second pump body (111), and the third pump body (112) is an electric drive pump; Wherein, at least one of the second pump body (111) and the third pump body (112) is in operation.

5. The decarbonization device according to claim 4, characterized in that: The first pump body (3) is a turbine pump; and / or, The second pump body (111) is a booster pump.

6. The decarbonization device according to claim 4, characterized in that: The washing tower (1) comprises an upper washing tower (101) and a lower washing tower (102) which are connected to each other, and the regeneration tower (2) comprises an upper regeneration tower (201) and a lower regeneration tower (202) which are connected to each other; one end of the outgoing connecting pipeline (4) is connected to the lower washing tower (102), and the other end of the outgoing connecting pipeline (4) is connected to the upper regeneration tower (201); One end of the first return connecting pipe (10) is connected to the regeneration upper tower (201), and the other end of the first return connecting pipe (10) is connected to the washing lower tower (102).

7. The decarbonization device according to claim 1, characterized in that: The inlet of the first pump body (3) is provided with a first shut-off valve (13), and the outlet of the first pump body (3) is provided with a second shut-off valve (14); and / or, The outlet of the first pump body (3) is provided with a safety valve (15).

8. The decarbonization device according to claim 1, characterized in that: The decarbonization device also includes: a regeneration branch (16), one end of the regeneration branch (16) and the other end of the regeneration branch (16) are both connected to the regeneration tower (2), and one end of the regeneration branch (16) is located above the other end of the regeneration branch (16); a second return connecting pipe (17), one end of the second return connecting pipe (17) being connected to the bottom of the regeneration tower (2), and the other end of the second return connecting pipe (17) being connected to the upper part of the washing tower (1); A heat exchange structure (18), wherein the heat exchange structure (18) has a first heat exchange passage and a second heat exchange passage which are separated from each other, wherein the first heat exchange passage is connected to the regeneration branch (16), and the second heat exchange passage is connected to the second return connecting pipe (17).

9. The decarbonization device according to claim 1, characterized in that: The washing tower (1) comprises an upper washing tower (101) and a lower washing tower (102) which are connected to each other, and the regeneration tower (2) comprises an upper regeneration tower (201) and a lower regeneration tower (202) which are connected to each other; the decarbonization device further comprises: a regeneration branch (16), one end of the regeneration branch (16) being connected to the bottom of the regeneration upper tower (201), and the other end of the regeneration branch (16) being connected to the top of the regeneration lower tower (202); a second return connecting pipe (17), one end of the second return connecting pipe (17) being connected to the bottom of the regeneration lower tower (202), and the other end of the second return connecting pipe (17) being connected to the top of the washing upper tower (101); A heat exchange structure (18), wherein the heat exchange structure (18) has a first heat exchange passage and a second heat exchange passage which are separated from each other, wherein the first heat exchange passage is connected to the regeneration branch (16), and the second heat exchange passage is connected to the second return connecting pipe (17).

10. The decarbonization device according to claim 9, characterized in that: The decarbonization device further comprises a first return connecting pipeline (10), and both ends of the first return connecting pipeline (10) are respectively connected to the regeneration tower (2) and the washing tower (1); wherein a first liquid outlet (1021) is provided at the bottom of the washing lower tower (102), a first liquid inlet (2011) is provided at the top of the regeneration upper tower (201), a liquid inlet of the outgoing connecting pipeline (4) is connected to the first liquid outlet (1021), and a liquid outlet of the outgoing connecting pipeline (4) is connected to the first liquid inlet (2011); and / or, The top of the washing lower tower (102) is provided with a second liquid inlet (1022), the bottom of the regeneration upper tower (201) is provided with a second liquid outlet (2012), the liquid inlet of the first return connecting pipeline (10) is connected to the second liquid outlet (2012), and the liquid outlet of the first return connecting pipeline (10) is connected to the second liquid inlet (1022); and / or, A third liquid outlet (2021) is provided at the bottom of the regeneration lower tower (202), a third liquid inlet (1011) is provided at the top of the washing upper tower (101), the liquid inlet of the second return connecting pipeline (17) is connected to the third liquid outlet (2021), and the liquid outlet of the second return connecting pipeline (17) is connected to the third liquid inlet (1011).

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