Skid-mounted mobile performance detection device for carbon dioxide capture absorbent

Abstract

The invention relates to the technical field of absorbent performance detection, in particular to a skid-mounted mobile carbon dioxide capture absorbent performance detection device which comprises a skid-mounted mobile platform formed by laying a plurality of skid-mounted mobile blocks. The flue gas pretreatment system, the carbon dioxide absorption system, the carbon dioxide desorption system and the public engineering system are integrated on the skid-mounted mobile platform in a skid-mounted manner; a desulfurized flue gas pipeline of the flue gas pretreatment system is connected with a desulfurized thermal power plant flue gas pipeline; the carbon dioxide absorption system comprises a plurality of small absorption towers which are sequentially connected in series end to end through pipelines and are sequentially arranged on the skid-mounted mobile platform at intervals; the carbon dioxide desorption system comprises a plurality of small desorption towers which are sequentially connected in series end to end through pipelines and are sequentially arranged on the skid-mounted mobile platform at intervals. The problems that real conditions of actual flue gas components are difficult to reproduce, links are not comprehensively considered, the performance of the absorbent cannot be comprehensively evaluated, and the evaluation result of the performance index of the absorbent is distorted are solved.

Description

Technical Field

[0001] This application relates to the field of absorbent performance testing technology, and in particular to a skid-mounted mobile carbon dioxide capture and absorbent performance testing device. Background Technology

[0002] In recent years, with the increasingly severe global climate change problem, carbon capture, utilization, and storage (CCUS) technology has become a key path for achieving low-carbon emission reduction in industrial sectors such as thermal power plants. Among them, chemical absorption has become one of the mainstream solutions for CO2 capture due to its high technological maturity and strong applicability. The performance of the absorbent directly determines the CO2 capture efficiency and economy. Therefore, key parameters such as the adaptability, stability, and regeneration energy consumption of the absorbent in actual flue gas environments need to be accurately detected and evaluated.

[0003] Currently, the performance testing of absorbents mainly relies on laboratory gas mixing simulation, which involves artificially preparing simulated flue gas (such as a mixture of N2, CO2, SO2, etc.) and conducting tests under controlled conditions. However, this method has at least the following significant limitations: 1. The composition of flue gas is difficult to reproduce under real conditions, leading to distorted assessment results: The actual flue gas composition of thermal power plants is complex, containing not only CO2 but also SO3 and NO. x The flue gas contains impurities such as dust and heavy metals, and its concentration changes dynamically with the type of coal, boiler load, and the operating status of environmental protection facilities. Laboratory gas mixing cannot completely replicate actual flue gas conditions, leading to distorted assessments of key indicators such as absorbent resistance to toxicity and degradation rate. For example, some amine-based absorbents that perform well in the laboratory may become ineffective in real flue gas due to SO2 catalytic degradation. 2. Incomplete consideration of each step and inability to conduct a comprehensive evaluation leads to distorted evaluation results: Existing tests often focus on a single absorption step, neglecting the coupling effects of the entire process such as desorption regeneration and solvent recovery. It is difficult to evaluate the comprehensive performance of the absorbent in the actual circulation system, resulting in distorted evaluation results. Some absorbents may even perform highly efficiently in the laboratory, but due to high regeneration energy consumption or poor thermal stability, the overall process is not economically viable. Summary of the Invention

[0004] The purpose of this application is to provide a skid-mounted mobile carbon dioxide capture and absorbent performance testing device to solve the technical problems of existing technologies, such as difficulty in reproducing the actual flue gas composition under real conditions, incomplete consideration of the process, inability to comprehensively evaluate the performance of the absorbent, and distortion of the absorbent performance index evaluation results.

[0005] This application provides a skid-mounted mobile carbon dioxide capture and absorbent performance testing device, comprising: A skid-mounted mobile platform formed by multiple skid-mounted moving blocks laid flat; and The skid-mounted integrated flue gas pretreatment system, carbon dioxide absorption system, carbon dioxide desorption system, and utility system are installed on the skid-mounted mobile platform. The flue gas pipeline after desulfurization in the flue gas pretreatment system is directly connected to the flue gas pipeline of the desulfurized thermal power plant. The carbon dioxide absorption system includes multiple small absorption towers connected in series via pipelines, and the carbon dioxide desorption system includes multiple small desorption towers connected in series via pipelines. Each of the small absorption towers is arranged at a distance on the skid-mounted mobile platform.

[0006] Furthermore, the flue gas pretreatment system also includes: an induced draft fan, an alkaline scrubbing tower, a flue gas inlet heat exchanger, a flue gas buffer tank, an alkaline solution buffer tank, an alkaline scrubbing circulating pump, and an alkaline scrubbing cooler; The desulfurized flue gas inlet pipeline is connected to the lower part of the alkaline scrubbing tower via the induced draft fan. The top of the alkaline scrubbing tower is connected to the top of the flue gas inlet heat exchanger via a pipeline. The bottom of the flue gas inlet heat exchanger is connected to the flue gas buffer tank via a pipeline. The top of the flue gas buffer tank is connected to the flue gas inlet pipeline of the carbon dioxide absorption system via a pipeline. Furthermore, the top of the alkali buffer tank is provided with an alkali injection port connected to the alkali pipeline and an alkali return port connected to the bottom of the alkali washing tower. The bottom of the alkali buffer tank is connected to one end of the alkali washing circulation pump through a pipeline, the other end of the alkali washing circulation pump is connected to the bottom of the alkali washing cooler through a pipeline, and the top of the alkali washing cooler is connected to the upper part of the alkali washing tower through a pipeline.

[0007] Furthermore, an interstage heat exchanger for regulating the absorbent temperature and an absorbent discharge pump for pumping the absorbent from the previous stage to the next stage of the small absorbent tower are arranged between two adjacent small absorbent towers; and / or A desorption tower discharge pump is arranged between two adjacent small desorption towers to pump the absorbent-rich liquid in the upper-level small desorption tower to the lower-level small desorption tower.

[0008] Furthermore, the carbon dioxide absorption system includes: an absorbent feed tank, an absorbent feed pump, a No. 1 absorption tower, a No. 2 absorption tower, a No. N absorption tower, a No. 1 absorption tower discharge pump, a No. 2 absorption tower discharge pump, a No. N absorption tower discharge pump, a No. 1 interstage heat exchanger, a No. 2 interstage heat exchanger, a No. N interstage heat exchanger, a security filter, and an absorption tail gas water separator. The absorbent feed tank is connected to the fresh absorbent pipeline and the desorbed lean liquid pipeline. The absorbent feed tank is connected to the upper part of the No. 1 absorption tower via the absorbent feed pump. The lower part of the No. 1 absorption tower is connected to the upper part of the No. 2 absorption tower via the No. 1 absorption tower discharge pump and the No. 1 interstage heat exchanger, and so on. The lower part of the No. 2 absorption tower is connected to the upper part of the No. N absorption tower via the No. 2 absorption tower discharge pump and the No. 2 interstage heat exchanger. The absorbent-rich liquid discharged from the bottom of the No. N absorption tower via the No. N absorption tower discharge pump and the No. N interstage heat exchanger is injected into the desorbed liquid feed tank and the reboiler of the carbon dioxide desorption system via the absorbent-rich liquid pipeline. Meanwhile, the flue gas inlet pipeline is connected to the Nth flue gas inlet at the bottom of the Nth absorption tower via the security filter. The Nth flue gas outlet at the top of the Nth absorption tower is connected to the second flue gas inlet at the bottom of the second absorption tower via a pipeline. The second flue gas outlet at the top of the second absorption tower is connected to the first flue gas inlet at the bottom of the first absorption tower via a pipeline. The first flue gas outlet at the top of the first absorption tower is connected to the absorption tail gas separator via a pipeline. The absorbent residue after passing through the absorption tail gas separator is connected from its bottom to the desorption liquid feed tank of the carbon dioxide desorption system via the tail gas residue pipeline. The flue gas after passing through the absorption tail gas separator is discharged from its top or returned to the power plant chimney.

[0009] Furthermore, the carbon dioxide desorption system includes: a desorption liquid feed tank, a desorption liquid feed pump, a No. 1 desorption tower, a No. 2 desorption tower, a No. N desorption tower, a No. 1 desorption tower discharge pump, a No. 2 desorption tower discharge pump, and a No. N desorption tower discharge pump; The desorption liquid feed tank has its top inlet connected to the absorbent rich liquid pipeline and the tail gas residual liquid pipeline discharged from the carbon dioxide absorption system. The desorption liquid feed tank is connected to the upper part of the No. 1 desorption tower via the desorption liquid feed pump. The bottom of the No. 1 desorption tower is connected to the top of the No. 2 desorption tower via the No. 1 desorption tower discharge pump, and so on. The bottom of the No. 2 desorption tower is connected to the top of the Nth desorption tower via the No. 2 desorption tower discharge pump. The desorbed lean liquid discharged from the bottom of the Nth desorption tower via the Nth desorption tower discharge pump is connected to the absorbent feed tank of the carbon dioxide absorption system via the desorbed lean liquid pipeline for recycling.

[0010] Furthermore, the carbon dioxide desorption system also includes a desorption tower reboiler, a desorption tower top condenser, and a desorption tail gas washing tank; The bottom of the Nth desorption tower is connected to the reboiler of the desorption tower via the Nth desorption tower discharge pump. The steam generated by heating in the reboiler returns from the top of the reboiler to the Nth desorption tower via a pipeline, and then sequentially enters the second and first desorption towers to provide steam for desorption. The desorbed steam is discharged from the top of the first desorption tower and connected to the top condenser of the desorption tower via a pipeline. After condensation in the top condenser, it is connected to the desorption tail gas washing tank. After washing in the desorption tail gas washing tank, the gaseous carbon dioxide is discharged and collected from the CO2 exhaust pipe at the top of the desorption tail gas washing tank, and the liquid tail gas washing residue is discharged from the bottom of the desorption tail gas washing tank via the tail gas washing residue pipeline for waste liquid treatment.

[0011] Furthermore, the utility system includes a circulating water system, a flushing water system, and a nitrogen blanketing system; The circulating water system includes a circulating water supply pipeline, a circulating water return pipeline, a circulating water buffer tank, and a circulating water pump. The circulating water supply pipeline is connected to the circulating water return pipeline through the circulating water buffer tank and the circulating water pump. The flushing water system includes a production water pipeline, a flushing water buffer tank, and a flushing water pump. The top of the flushing water buffer tank is connected to the production water pipeline, and one end of the flushing water pump is connected to the bottom of the flushing water buffer tank via a pipeline, while the other end is connected to the equipment utility interface. The nitrogen sealing system includes a nitrogen storage tank and a nitrogen buffer tank connected to the nitrogen storage tank via a pipeline, and the top of the nitrogen buffer tank is connected to the equipment utility interface via a pipeline.

[0012] Furthermore, the skid-mounted mobile carbon dioxide capture and absorbent performance testing device also includes a detection and analysis unit and an online monitoring instrument that is electrically connected to the detection and analysis unit; The online monitoring instruments include: a first flue gas flow meter and a first CO2 concentration online monitor installed at the bottom of the Nth absorption tower at the Nth flue gas inlet, used to monitor the flue gas flow rate and carbon dioxide content in the flue gas at the absorption tower inlet, respectively; a second flue gas flow meter and a second CO2 concentration online monitor installed at the top of the first absorption tower at the first flue gas outlet, used to monitor the flue gas flow rate and carbon dioxide content in the flue gas at the absorption tower outlet, respectively; and an energy meter installed in the desorption tower reboiler and a CO2 flow meter installed on the CO2 exhaust pipe at the top of the desorption tail gas washing tank, used to monitor the power consumption of the desorption tower reboiler and the amount of CO2 captured after desorption, respectively. The detection and analysis unit derives the CO2 capture efficiency, CO2 absorption rate, and CO2 desorption energy consumption based on the monitoring parameters obtained by the online monitoring instrument.

[0013] Furthermore, the skid-mounted mobile carbon dioxide capture and absorbent performance testing device further includes: a multi-parameter monitoring sensor installed in the flue gas pretreatment system, the carbon dioxide absorption system, the carbon dioxide desorption system, and the utility system, which includes an online CO2 concentration monitor, an online SO2 concentration monitor, a temperature sensor, and a pressure sensor, and the multi-parameter monitoring sensor is electrically connected to the detection and analysis unit.

[0014] Furthermore, the detection and analysis unit includes a calculation and processing module and a data storage module. The data storage module establishes corresponding databases for regional information, fuel type information, environmental variable information, and absorbent performance information based on the flue gas channels of different thermal power plants.

[0015] Compared with the prior art, the skid-mounted mobile carbon dioxide capture and absorbent performance testing device provided in this application includes a skid-mounted mobile platform formed by multiple skid-mounted mobile blocks laid flat, and a flue gas pretreatment system, a carbon dioxide absorption system, a carbon dioxide desorption system, and a utility system integrated on the skid-mounted mobile platform; furthermore, the flue gas pipeline after desulfurization of the flue gas pretreatment system is directly connected to the flue gas pipeline of the desulfurized thermal power plant; and the carbon dioxide absorption system includes multiple small absorption towers connected in series through the pipeline, the carbon dioxide desorption system includes multiple small desorption towers connected in series through the pipeline, and the small absorption towers are arranged at intervals on the skid-mounted mobile platform, and the small desorption towers are also arranged at intervals on the skid-mounted mobile platform.

[0016] With this setup, firstly, this application adopts a modular skid-mounted mobile testing device, which can be quickly and flexibly moved to different thermal power plants, achieving flexible adaptation to multiple power plants. Furthermore, this application divides the traditional tall, large-volume large absorption towers and large desorption towers into multiple small absorption towers and small desorption towers of reasonable height for easy transport. Each small absorption tower is connected in series with pipelines and arranged sequentially on the skid-mounted mobile platform. Similarly, each small desorption tower is connected in series with pipelines and arranged sequentially on the skid-mounted mobile platform, further facilitating transport, enabling rapid relocation and installation, and ensuring installation stability during transport.

[0017] Secondly, this mobile testing device can directly move each testing system to the site of a thermal power plant, connecting the desulfurized flue gas pipeline of the testing device directly to the flue gas pipeline of the desulfurized thermal power plant on site. Testing is conducted using real flue gas, which is not artificially simplified and contains all actual impurities and concentration fluctuations. This allows for accurate determination of the absorbent's chemical stability, corrosivity, and anti-pollution capabilities under real operating conditions, improving the reliability of the evaluation results. It effectively solves the problem of distorted evaluation of key indicators such as absorbent toxicity resistance and degradation rate due to the difficulty in fully replicating actual flue gas conditions in laboratory gas mixing. Furthermore, it can quickly connect to flue gas pipelines of different thermal power plants and is adaptable to various flue gas components, such as high-sulfur coal, low-sulfur coal, and flue gas after different desulfurization processes, enabling comprehensive research on different flue gas components from various thermal power plants.

[0018] Third, the detection device of this application integrates a flue gas pretreatment system, a carbon dioxide absorption system, a carbon dioxide desorption system, and a utility system, encompassing the entire process of carbon dioxide capture and detection, including carbon dioxide absorption, desorption regeneration, and solvent recovery. This enables closed-loop testing under real flue gas conditions, overcoming the limitations of laboratory testing that only considers the absorption stage. It directly reflects the comprehensive performance of the absorbent in the industrial system, enabling a comprehensive evaluation of the absorbent's performance. Furthermore, it can detect full-cycle indicators such as absorption rate and regeneration energy consumption, effectively solving the problem of distorted absorbent performance evaluation results caused by considering only one stage, and improving the reliability of the evaluation and testing results. Attached Figure Description

[0019] To more clearly illustrate the technical solutions in the specific embodiments of this application or the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a three-dimensional structural schematic diagram of the skid-mounted mobile carbon dioxide capture and absorbent performance testing device provided in the embodiments of this application; Figure 2 This is a top view of the skid-mounted mobile carbon dioxide capture and absorbent performance testing device provided in an embodiment of this application. Figure 3 This is a top plan view of the skid-mounted mobile carbon dioxide capture and absorbent performance testing device provided in the embodiments of this application. Figure 4 This is a schematic diagram of the equipment and pipeline connections of the flue gas pretreatment system provided in the embodiments of this application; Figure 5Schematic diagram of equipment and pipeline connections for the carbon dioxide absorption system provided in the embodiments of this application. Figure 1 ; Figure 6 Schematic diagram of equipment and pipeline connections for the carbon dioxide absorption system provided in the embodiments of this application. Figure 2 ; Figure 7 This is a schematic diagram of the equipment and pipeline connections of the carbon dioxide desorption system provided in the embodiments of this application. Figure 1 ; Figure 8 This is a schematic diagram of the equipment and pipeline connections of the carbon dioxide desorption system provided in the embodiments of this application. Figure 2 ; Figure 9 This is a schematic diagram of the equipment and pipeline connections of the carbon dioxide desorption system provided in the embodiments of this application. Figure 3 ; Figure 10 This is a schematic diagram of the equipment and pipeline connections of the circulating water system provided in an embodiment of this application. Figure 11 This is a schematic diagram of the equipment and pipeline connections for the flushing water system and nitrogen blanketing system provided in the embodiments of this application.

[0021] Figure label: 10- Flue gas pretreatment system; 11-Exhaust fan; 12-Alkali washing tower; 13- Flue gas inlet heat exchanger; 14 - Flue gas buffer tank; 15-Alkali buffer tank; 16-Alkali washing circulating pump; 17-Alkali washing cooler; 181 - Flue gas pipeline after desulfurization; 182 - Alkali solution pipeline; 20-Carbon Dioxide Absorption System; 21-Absorbent feed tank; 22-Absorbent feed pump; 23-Small absorption tower; 231-No. 1 Absorption Tower; 232 - Absorption Tower No. 2; Absorption tower No. 233-N; 241 - No. 1 Absorption Tower Discharge Pump; 242 - No. 2 Absorption Tower Discharge Pump; 243-N Absorber Tower Discharge Pump; 251-Interstage heat exchanger (stage 1); 252 - Second stage interstage heat exchanger; 26-Security Filter; 27 - Absorption tail gas separator; 281 - Fresh Absorbent Pipeline; 282 - Flue gas inlet pipeline; 283 - Absorbent-rich liquid pipeline; 284 - Exhaust gas residual liquid pipeline; 30-Carbon dioxide desorption system; 31 - Desorption liquid feed tank; 32 - Desorption liquid feed pump; 33-Small desorption tower; 331-Desorption Tower No. 1; 332 - Desorption Tower No. 2; 333-Desorption Tower No. 3; 334-Desorption Tower No. 4; 335-Desorption Tower No. 5; 341 - No. 1 desorption tower discharge pump; 342 - No. 2 desorption tower discharge pump; 343 - Discharge pump for desorption tower No. 3; 344-Fourth Desorption Tower Discharge Pump; 345-No. 5 desorption tower discharge pump; 35 - Desorption tower reboiler; 361 - Desorption and lean solution pipeline; 362 - Desorption steam pipeline; 363 - Exhaust gas water washing residual liquid pipeline; 37 - Desorption tower top condenser; 38 - Desorption tail gas washing tank; 40 - Circulating water system; 41-Circulating water supply pipeline; 42 - Circulating water return pipeline; 43 - Circulating water buffer tank; 44 - Circulating water pump; 50 - Flushing water system; 51-Production water pipeline; 52 - Rinse water buffer tank; 53 - Flushing water pump; 60-Nitrogen blanketing system; 61 - Nitrogen storage tank; 62-Nitrogen buffer tank; 70 - Skid-mounted moving block. Detailed Implementation

[0022] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0023] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application.

[0024] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0025] In the description of this application, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this application is in use. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0026] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0027] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0028] The following detailed description of some embodiments of this application is provided in conjunction with the accompanying drawings. Unless otherwise specified, the following embodiments and features can be combined with each other.

[0029] like Figures 1 to 11 As shown, this application provides a skid-mounted mobile carbon dioxide capture and absorbent performance testing device, including a skid-mounted mobile platform formed by multiple skid-mounted mobile blocks 70 laid flat; and a flue gas pretreatment system 10, a carbon dioxide absorption system 20, a carbon dioxide desorption system 30, and a utility system integrated on the skid-mounted mobile platform; wherein, the desulfurized flue gas pipeline 181 of the flue gas pretreatment system 10 is directly connected to the desulfurized flue gas pipeline of the thermal power plant. Preferably, the aforementioned testing systems can be assembled from multiple skid-mounted mobile blocks 70, and the transport dimensions (length, width, and height) of a single skid-mounted mobile block 70 generally do not exceed 13.8m, 2.4m, and 2.8m, respectively. Furthermore, the pipelines and lines between the multiple skid-mounted mobile blocks 70 can use quick-connect couplings for convenient and rapid installation and disassembly. Furthermore, standardized pipe interfaces are preferably used to achieve rapid deployment of the device and reduce the relocation and commissioning costs between different power plants.

[0030] Furthermore, existing absorption towers, in order to ensure a CO2 capture rate of over 95%, are often very tall, making them inconvenient to transport. Similarly, existing desorption towers, in order to ensure a high desorption rate in the absorbent-rich solution, are also often very tall, making them inconvenient to transport. The detection device provided in this application preferably includes a carbon dioxide absorption system 20 comprising multiple small absorption towers 23 connected in series via pipelines. The height and diameter of each small absorption tower 23 can be determined based on the CO2 absorption capacity, and the number of small absorption towers 23 connected in series can be determined based on the CO2 capture rate. The carbon dioxide desorption system 30 may also include multiple small desorption towers 33 connected in series via pipelines, with each small absorption tower 23 arranged at intervals on the skid-mounted mobile platform. The number of small desorption towers 33 connected in series can be determined based on the desorption rate.

[0031] Compared with the prior art, the skid-mounted mobile carbon dioxide capture and absorbent performance testing device provided in this application has several advantages. First, it adopts a modular skid-mounted mobile testing device, which can be quickly and flexibly moved to different thermal power plants, achieving flexible adaptation to multiple power plants. Furthermore, this application divides the traditional tall, large-volume large absorption towers and large desorption towers into multiple small absorption towers 23 and small desorption towers 33 with reasonable heights for easy transport. Each small absorption tower 23 is connected in series with pipelines and arranged sequentially on the skid-mounted mobile platform. Similarly, each small desorption tower 33 is also connected in series with pipelines and arranged sequentially on the skid-mounted mobile platform, further facilitating transport, rapid relocation and installation, and ensuring installation stability during transport.

[0032] Secondly, this mobile testing device can directly move each testing system to the site of a thermal power plant. The desulfurized flue gas pipeline 181 of the testing device can be directly connected to the desulfurized flue gas pipeline of the thermal power plant on site. The test is conducted using real flue gas, which is not artificially simplified and contains all actual impurities and concentration fluctuations. This allows for accurate determination of the chemical stability, corrosiveness, and anti-pollution ability of the absorbent under real operating conditions, improving the reliability of the evaluation results. It effectively solves the problem of distortion in the evaluation of key indicators such as the absorbent's resistance to toxicity and degradation rate due to the difficulty in fully replicating actual flue gas conditions in laboratory gas mixing. Furthermore, it can be quickly connected to the flue gas pipelines of different thermal power plants and is adaptable to various flue gas components, such as high-sulfur coal, low-sulfur coal, and flue gas after different desulfurization processes. This enables comprehensive research on different flue gas components from various thermal power plants.

[0033] Third, the detection device provided in this application embodiment integrates a flue gas pretreatment system 10, a carbon dioxide absorption system 20, a carbon dioxide desorption system 30, and a utility system, etc., which integrates carbon dioxide absorption, desorption regeneration, solvent recovery, and other multi-stage carbon dioxide capture and detection processes. This enables closed-loop testing under real flue gas conditions, breaking through the limitations of laboratory testing that only considers the absorption stage. It directly reflects the comprehensive performance of the absorbent in the industrial system, realizes the comprehensive evaluation of the absorbent's performance, and can achieve full-cycle index testing such as absorption rate and regeneration energy consumption. This effectively solves the problem of distorted absorbent performance index evaluation results caused by considering only one stage, and improves the reliability of the evaluation and testing results.

[0034] like Figures 1 to 4 As shown, in a specific embodiment, the aforementioned flue gas pretreatment system 10 is mainly used to treat flue gas introduced from the flue gas duct of a thermal power plant, adjust the pH of the flue gas, and further remove dust from the flue gas. Specifically, the flue gas pretreatment system 10 may include the aforementioned desulfurized flue gas pipeline 181, alkali solution pipeline 182, induced draft fan 11, alkali washing tower 12, flue gas inlet heat exchanger 13, flue gas buffer tank 14, alkali solution buffer tank 15, alkali washing circulating pump 16, and alkali washing cooler 17.

[0035] The desulfurized flue gas pipeline 181, which is directly connected to the flue gas pipeline of the desulfurized thermal power plant on site, is connected to the lower part of the alkaline scrubbing tower 12 via the induced draft fan 11. The desulfurized flue gas enters the lower part of the alkaline scrubbing tower 12 through the induced draft fan 11. Inside the alkaline scrubbing tower 12, the flue gas comes into countercurrent contact with the alkaline solution entering from the top, adjusting the pH and reducing the dust content before being discharged from the upper part of the alkaline scrubbing tower 12. The top of the alkaline scrubbing tower is connected to the top of the flue gas inlet heat exchanger 13 via a pipeline. The bottom of the flue gas inlet heat exchanger 13 is connected to the flue gas buffer tank 14 via a pipeline, so that the flue gas temperature is adjusted in the flue gas inlet heat exchanger 13 before entering the flue gas buffer tank 14. The top of the flue gas buffer tank 14 is connected to the flue gas inlet pipeline 282 of the carbon dioxide absorption system 20 via a pipeline, so that the flue gas enters the carbon dioxide absorption system 20.

[0036] Meanwhile, the top of the alkali buffer tank 15 is provided with an alkali injection port connected to the alkali pipeline 182 and an alkali return port connected to the bottom of the alkali washing tower 12. The alkali injection port is connected to the alkali pipeline 182 to inject 32% soda ash into the alkali buffer tank 15. The bottom of the alkali buffer tank 15 is connected to one end of the alkali washing circulation pump 16 through a pipeline. The other end of the alkali washing circulation pump 16 is connected to the bottom of the alkali washing cooler 17 through a pipeline. After entering the alkali washing cooler 17 for cooling and heat exchange, the top of the alkali washing cooler 17 is connected to the upper part of the aforementioned alkali washing tower 12 through a pipeline. It enters the alkali washing tower 12 from the upper part and comes into countercurrent contact with the flue gas entering from the lower part of the alkali washing tower 12. It is then discharged from the lower part of the alkali washing tower 12 and returns to the alkali buffer tank 15 from the alkali return port at the top of the alkali buffer tank 15.

[0037] In one optional embodiment, an interstage heat exchanger and an absorber discharge pump can be arranged between the two adjacent small absorber towers 23. The interstage heat exchanger is used to regulate the absorbent temperature, and the absorber discharge pump is used to pump the absorbent from the previous small absorber tower 23 to the next small absorber tower 23. Similarly, a desorption tower discharge pump can be arranged between the two adjacent small desorption towers 33 to pump the absorbent-rich solution from the previous small desorption tower 33 to the next small desorption tower 33.

[0038] like Figure 5 and Figure 6As shown, a specific embodiment is illustrated in this application, which uses N small absorption towers 23 connected in series as an example. The carbon dioxide absorption system 20 may specifically include: an absorbent feed tank 21, an absorbent feed pump 22, a first absorption tower 231, a second absorption tower 232, an Nth absorption tower 233, a first absorption tower discharge pump 241, a second absorption tower discharge pump 242, an Nth absorption tower discharge pump 243, a first interstage heat exchanger 251, a second interstage heat exchanger 252, an Nth interstage heat exchanger, a security filter 26, and an absorption tail gas water separator 27.

[0039] The absorbent feed tank 21 is connected to the fresh absorbent pipeline 281 and the desorbed lean liquid pipeline 361. Fresh and desorbed absorbent are injected into the absorbent feed tank 21. The absorbent feed tank 21 is connected to the upper part of the first absorption tower 231 via a pipeline through the absorbent feed pump 22. The absorbent is injected from the upper part of the first absorption tower 231 through the absorbent feed pump 22, making counter-current contact with the flue gas entering from the lower part. After capturing CO2, it is discharged from the lower part of the first absorption tower through the first absorption tower discharge pump 241, and then through the first absorption tower discharge pump 241. After the temperature is adjusted by the interstage heat exchanger 251, the solution enters from the upper part of the second absorption tower 232 through a pipeline. Similarly, the lower part of the second absorption tower 232 is connected to the upper part of the Nth absorption tower 233 through the second absorption tower discharge pump 242 and the second interstage heat exchanger 252. The absorbent rich solution discharged from the bottom of the Nth absorption tower 233 through the Nth absorption tower discharge pump 243 and the Nth interstage heat exchanger is injected into the desorption liquid feed tank 31 of the carbon dioxide desorption system 30 through the absorbent rich solution pipeline 283.

[0040] Simultaneously, the flue gas, after passing through the flue gas inlet pipeline 282 and the security filter 26, enters from the Nth flue gas inlet located at the bottom of the Nth absorption tower 233. After contacting the absorbent in a counter-current manner, it exits from the top of the Nth absorption tower 233, and so on, until it exits from the top of the first absorption tower 231. Specifically, the Nth flue gas outlet located at the top of the Nth absorption tower 233 is connected via a pipeline to the second flue gas inlet located at the bottom of the second absorption tower 232, and the second flue gas outlet located at the top of the second absorption tower 232 is connected via... The pipeline connects to the No. 1 flue gas inlet located at the bottom of the No. 1 absorption tower 231; the No. 1 flue gas outlet located at the top of the No. 1 absorption tower 231 is connected to the absorption tail gas water separator 27 via a pipeline. The absorbent residue after passing through the absorption tail gas water separator 27 is connected from the bottom of the absorption tail gas water separator 27 through the tail gas residue pipeline 284 to the desorption liquid feed tank 31 of the carbon dioxide desorption system 30 and enters the carbon dioxide desorption system 30. The flue gas after passing through the absorption tail gas water separator 27 is discharged from its top or returned to the chimney of the thermal power plant.

[0041] like Figure 7 and Figure 9 As shown, a specific embodiment is illustrated in this application, which uses a series of five small desorption towers 33 as an example. The carbon dioxide desorption system 30 may specifically include a desorption liquid feed tank 31, a desorption liquid feed pump 32, a first desorption tower 331, a second desorption tower 332, a third desorption tower 333, a fourth desorption tower 334, a fifth desorption tower 335, a first desorption tower discharge pump 341, a second desorption tower discharge pump 342, a third desorption tower discharge pump 343, a fourth desorption tower discharge pump 344, a fifth desorption tower discharge pump 345, a desorption tower reboiler 35, a desorption tower top condenser 37, and a desorption tail gas washing tank 38.

[0042] The desorption process employs countercurrent desorption. The top inlet of the desorption liquid feed tank 31 is connected to the absorbent rich liquid pipeline 283 and the tail gas residual liquid pipeline 284 discharged from the aforementioned carbon dioxide absorption system 20 to inject the absorbent rich liquid and absorbent residual liquid. The desorption liquid feed tank 31 is connected to the upper part of the first desorption tower 331 via a pipeline through the desorption liquid feed pump 32. The bottom of the first desorption tower 331 is connected to the top of the second desorption tower 332 via a pipeline through the first desorption tower discharge pump 341, and so on. The bottom of the second desorption tower 332 is connected to the top of the Nth desorption tower via a pipeline through the second desorption tower discharge pump 342. The desorbed lean liquid discharged from the bottom of the Nth desorption tower via the Nth desorption tower discharge pump is connected to the absorbent feed tank 21 of the aforementioned carbon dioxide absorption system 20 via the desorbed lean liquid pipeline 361 for recycling.

[0043] Specifically, the bottom of the second desorption tower 332 is connected to the top of the third desorption tower 333 via a pipeline through the second desorption tower discharge pump 342. The bottom of the third desorption tower 333 is connected to the top of the fourth desorption tower 334 via the third desorption tower discharge pump 343. The bottom of the fourth desorption tower 334 is connected to the top of the fifth desorption tower 335 via a pipeline through the fourth desorption tower discharge pump 344. The gas phase after desorption is mainly carbon dioxide and a small amount of absorbent. The lean liquid discharged from the bottom of the fifth desorption tower 335 via the fifth desorption tower discharge pump 345 is returned to the absorbent feed tank 21 of the aforementioned carbon dioxide absorption system 20 for recycling after heat recovery and through the lean liquid pipeline 361.

[0044] Furthermore, no additional steam is introduced into the desorption process. All desorption steam is generated by directly heating the rich absorbent liquid in the desorption tower reboiler 35. Specifically, the desorption tower reboiler 35 can be heated by an electric heater, which is convenient for installation and use in different power plants and different locations.

[0045] Specifically, the bottom of the fifth desorption tower 335 is connected to the reboiler 35 via the fifth desorption tower discharge pump 345. The steam generated by heating in the reboiler 35 returns from the top of the reboiler 35 through a pipeline into the fifth desorption tower 335, and then from the top of the fifth desorption tower 335 through a pipeline into the fourth desorption tower 334 from the bottom, and so on, sequentially entering the third desorption tower 333, the second desorption tower 332, and the first desorption tower 331 to provide... Steam is used for desorption, and the desorbed steam is discharged from the top of the first desorption tower 331 and connected to the top condenser 37 of the desorption tower through the desorption steam pipeline 362. After being condensed by the top condenser 37, it is connected to the desorption tail gas washing tank 38. After being washed by the desorption tail gas washing tank 38, the gas phase carbon dioxide is discharged from the CO2 exhaust pipe set at the top of the desorption tail gas washing tank 38 and collected. The liquid phase tail gas washing residue is discharged from the bottom of the desorption tail gas washing tank 38 through the tail gas washing residue pipeline 363 and is treated as waste liquid.

[0046] like Figure 10 and Figure 11 As shown, the utility system mainly provides cooling capacity for the unit, nitrogen blanketing protection for the absorbent buffer tank, purging facilities, and flushing facilities for absorbent replacement or maintenance. In one specific embodiment, the utility system may include a circulating water system 40, a flushing water system 50, and a nitrogen blanketing system 60.

[0047] Specifically, such as Figure 10 As shown, the circulating water system 40 may include a circulating water supply pipeline 41, a circulating water return pipeline 42, a circulating water buffer tank 43, and a circulating water pump 44. The circulating water supply pipeline 41 can be connected to the circulating water return pipeline 42 through the circulating water buffer tank 43 and the circulating water pump 44.

[0048] More specifically, such as Figure 11 As shown, the flushing water system 50 may include a production water pipeline 51, a flushing water buffer tank 52, and a flushing water pump 53. The top of the flushing water buffer tank 52 is connected to the production water pipeline 51, one end of the flushing water pump 53 is connected to the bottom of the flushing water buffer tank 52 via a pipeline, and the other end is connected to the equipment utility interface.

[0049] More specifically, such as Figure 11 As shown, the nitrogen sealing system 60 may include a nitrogen storage tank 61 and a nitrogen buffer tank 62 connected to the nitrogen storage tank 61 via a pipeline, and the top of the nitrogen buffer tank 62 is connected to the equipment utility interface via a pipeline.

[0050] In a preferred embodiment, the skid-mounted mobile carbon dioxide capture and absorbent performance testing device provided in this application may further include a detection and analysis unit and online monitoring instruments electrically connected to the detection and analysis unit. Specifically, the online monitoring instruments may include: a first flue gas flow meter and a first CO2 concentration online monitor installed at the bottom of the aforementioned N-type absorption tower 233 at the N-type flue gas inlet, used to monitor the flue gas flow rate at the absorption tower inlet and the carbon dioxide content in the flue gas at the absorption tower inlet, respectively; a second flue gas flow meter and a second CO2 concentration online monitor installed at the top of the aforementioned first-type absorption tower 231 at the first-type flue gas outlet, used to monitor the flue gas flow rate at the absorption tower outlet and the carbon dioxide content in the flue gas at the absorption tower outlet, respectively; and an energy meter installed in the aforementioned desorption tower reboiler 35 and a CO2 flow meter installed on the CO2 exhaust pipe at the top of the desorption tail gas washing tank 38, used to monitor the power consumption of the desorption tower reboiler and the amount of CO2 captured after desorption, respectively.

[0051] Furthermore, the detection and analysis unit may specifically include a calculation and processing module and a data storage module. The calculation and processing module can obtain the CO2 capture efficiency, CO2 absorption rate and CO2 desorption energy consumption based on the aforementioned monitoring parameters obtained by the online monitoring instrument, and thus evaluate the performance of the absorbent.

[0052] Specifically, it can be obtained through the following calculation formula: 1. CO2 capture efficiency, calculated using the following formula:

[0053] In the formula: η is the CO2 capture efficiency; V0 is the flue gas volume at the inlet of the absorption tower, in m³ / s. 3 / s, obtained by monitoring the first flue gas flow meter mentioned above; C0 is the carbon dioxide content in the flue gas at the inlet of the absorption tower, obtained by monitoring the first online CO2 concentration instrument mentioned above; V1 is the flue gas volume at the outlet of the absorption tower, in m³ / s. 3 / s, obtained by monitoring the second flue gas flow meter mentioned above; C1 is the carbon dioxide content in the flue gas at the outlet of the absorption tower, obtained by monitoring the second CO2 concentration online monitor mentioned above.

[0054] 2. Energy consumption for CO2 desorption is calculated using the following formula:

[0055] 1 kWh = 0.0036 GJ In the formula: E is the energy consumption for CO2 desorption, GJ / t CO2 ; a represents the electricity consumption per unit time, in kWh, obtained from the aforementioned electricity meter monitoring; m represents the CO2 capture amount per unit time, in t, obtained from the aforementioned CO2 flow meter monitoring.

[0056] 3. CO2 absorption rate, calculated using the following formula:

[0057] In the formula: V 吸 t represents the CO2 absorption rate, in mol / h; t represents the CO2 absorption time of the absorbent, in h.

[0058] Furthermore, the lifespan of the absorbent can be evaluated by counting the number of cycles when the absorbent's absorption rate decreases to 90%, 80%, 70%, 60%, and 50% of the fresh absorbent's absorption rate.

[0059] In a preferred embodiment, the skid-mounted mobile carbon dioxide capture and absorbent performance testing device of this application may further include: a multi-parameter monitoring sensor installed in the aforementioned flue gas pretreatment system 10, carbon dioxide absorption system 20, carbon dioxide desorption system 30 and utility system. The multi-parameter monitoring sensor may include the aforementioned online CO2 concentration monitor, online SO2 concentration monitor, temperature sensor and pressure sensor, etc., and the multi-parameter monitoring sensor is electrically connected to the aforementioned detection and analysis unit.

[0060] To support the dynamic adjustment of flue gas flow rate, temperature, and CO2 concentration, simulate power plant start-up and shutdown, load ramping and other operating conditions, test the response characteristics of absorbent and equipment, and verify the adjustment capability of the control system under changing operating conditions, such as maintaining stable collection efficiency by adjusting the circulating liquid flow rate, and provide parameter basis for engineering design.

[0061] In a further embodiment, the detection and analysis unit may also include a data storage module. This data storage module can establish corresponding databases for regional information, fuel type information, environmental variable information, and absorbent performance information based on the flue gas channels of different accessed thermal power plants. The aforementioned multi-parameter sensors can record the correlation data between environmental variables and absorbent performance in real time. Based on this, a database of correlation between absorbent performance and flue gas characteristics can be established. This enables customized absorbent recommendations for thermal power plants in different regions and with different fuel types, providing a basis for personalized absorbent selection and avoiding efficiency losses caused by a "one-size-fits-all" approach.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A skid-mounted mobile carbon dioxide capture and absorbent performance testing device, characterized in that, include: A skid-mounted mobile platform formed by multiple skid-mounted movable blocks laid flat. and The skid-mounted integrated flue gas pretreatment system, carbon dioxide absorption system, carbon dioxide desorption system, and utility system are installed on the skid-mounted mobile platform. The flue gas pipeline after desulfurization in the flue gas pretreatment system is directly connected to the flue gas pipeline of the desulfurized thermal power plant. The carbon dioxide absorption system includes multiple small absorption towers connected in series via pipelines, and the carbon dioxide desorption system includes multiple small desorption towers connected in series via pipelines. Each of the small absorption towers is arranged at a distance on the skid-mounted mobile platform.

2. The skid-mounted mobile carbon dioxide capture and absorbent performance testing device according to claim 1, characterized in that, The flue gas pretreatment system also includes: an induced draft fan, an alkaline scrubbing tower, a flue gas inlet heat exchanger, a flue gas buffer tank, an alkaline solution buffer tank, an alkaline scrubbing circulating pump, and an alkaline scrubbing cooler. The desulfurized flue gas inlet pipeline is connected to the lower part of the alkaline scrubbing tower via the induced draft fan. The top of the alkaline scrubbing tower is connected to the top of the flue gas inlet heat exchanger via a pipeline. The bottom of the flue gas inlet heat exchanger is connected to the flue gas buffer tank via a pipeline. The top of the flue gas buffer tank is connected to the flue gas inlet pipeline of the carbon dioxide absorption system via a pipeline. Furthermore, the top of the alkali buffer tank is provided with an alkali injection port connected to the alkali pipeline and an alkali return port connected to the bottom of the alkali washing tower. The bottom of the alkali buffer tank is connected to one end of the alkali washing circulation pump through a pipeline, the other end of the alkali washing circulation pump is connected to the bottom of the alkali washing cooler through a pipeline, and the top of the alkali washing cooler is connected to the upper part of the alkali washing tower through a pipeline.

3. The skid-mounted mobile carbon dioxide capture and absorbent performance testing device according to claim 2, characterized in that, An interstage heat exchanger for regulating the absorbent temperature and an absorbent discharge pump for pumping the absorbent from the previous stage to the next stage of the small absorbent tower are arranged between two adjacent small absorbent towers; and / or A desorption tower discharge pump is arranged between two adjacent small desorption towers to pump the absorbent-rich liquid in the upper-level small desorption tower to the lower-level small desorption tower.

4. The skid-mounted mobile carbon dioxide capture and absorbent performance testing device according to claim 3, characterized in that, The carbon dioxide absorption system includes: an absorbent feed tank, an absorbent feed pump, a No. 1 absorption tower, a No. 2 absorption tower, a No. N absorption tower, a No. 1 absorption tower discharge pump, a No. 2 absorption tower discharge pump, a No. N absorption tower discharge pump, a No. 1 interstage heat exchanger, a No. 2 interstage heat exchanger, a No. N interstage heat exchanger, a security filter, and an absorption tail gas water separator. The absorbent feed tank is connected to the fresh absorbent pipeline and the desorbed lean liquid pipeline. The absorbent feed tank is connected to the upper part of the No. 1 absorption tower via the absorbent feed pump. The lower part of the No. 1 absorption tower is connected to the upper part of the No. 2 absorption tower via the No. 1 absorption tower discharge pump and the No. 1 interstage heat exchanger, and so on. The lower part of the No. 2 absorption tower is connected to the upper part of the No. N absorption tower via the No. 2 absorption tower discharge pump and the No. 2 interstage heat exchanger. The absorbent-rich liquid discharged from the bottom of the No. N absorption tower via the No. N absorption tower discharge pump and the No. N interstage heat exchanger is injected into the desorbed liquid feed tank of the carbon dioxide desorption system through the absorbent-rich liquid pipeline. Meanwhile, the flue gas inlet pipeline is connected to the Nth flue gas inlet at the bottom of the Nth absorption tower via the security filter. The Nth flue gas outlet at the top of the Nth absorption tower is connected to the second flue gas inlet at the bottom of the second absorption tower via a pipeline. The second flue gas outlet at the top of the second absorption tower is connected to the first flue gas inlet at the bottom of the first absorption tower via a pipeline. The first flue gas outlet at the top of the first absorption tower is connected to the absorption tail gas separator via a pipeline. The absorbent residue after passing through the absorption tail gas separator is connected from its bottom to the desorption liquid feed tank of the carbon dioxide desorption system via the tail gas residue pipeline. The flue gas after passing through the absorption tail gas separator is discharged from its top or returned to the power plant chimney.

5. The skid-mounted mobile carbon dioxide capture and absorbent performance testing device according to claim 4, characterized in that, The carbon dioxide desorption system includes: a desorption liquid feed tank, a desorption liquid feed pump, a No. 1 desorption tower, a No. 2 desorption tower, a No. N desorption tower, a No. 1 desorption tower discharge pump, a No. 2 desorption tower discharge pump, and a No. N desorption tower discharge pump; The desorption liquid feed tank has its top inlet connected to the absorbent rich liquid pipeline and the tail gas residual liquid pipeline discharged from the carbon dioxide absorption system. The desorption liquid feed tank is connected to the upper part of the No. 1 desorption tower via the desorption liquid feed pump. The bottom of the No. 1 desorption tower is connected to the top of the No. 2 desorption tower via the No. 1 desorption tower discharge pump, and so on. The bottom of the No. 2 desorption tower is connected to the top of the Nth desorption tower via the No. 2 desorption tower discharge pump. The desorbed lean liquid discharged from the bottom of the Nth desorption tower via the Nth desorption tower discharge pump is connected to the absorbent feed tank of the carbon dioxide absorption system via the desorbed lean liquid pipeline for recycling.

6. The skid-mounted mobile carbon dioxide capture and absorbent performance testing device according to claim 5, characterized in that, The carbon dioxide desorption system also includes a desorption tower reboiler, a desorption tower top condenser, and a desorption tail gas washing tank; The bottom of the Nth desorption tower is connected to the reboiler of the desorption tower via the Nth desorption tower discharge pump. The steam generated by heating in the reboiler returns from the top of the reboiler to the Nth desorption tower via a pipeline, and then sequentially enters the second and first desorption towers to provide steam for desorption. The desorbed steam is discharged from the top of the first desorption tower and connected to the top condenser of the desorption tower via a pipeline. After condensation in the top condenser, it is connected to the desorption tail gas washing tank. After washing in the desorption tail gas washing tank, the gaseous carbon dioxide is discharged and collected from the CO2 exhaust pipe at the top of the desorption tail gas washing tank, and the liquid tail gas washing residue is discharged from the bottom of the desorption tail gas washing tank via the tail gas washing residue pipeline for waste liquid treatment.

7. The skid-mounted mobile carbon dioxide capture and absorbent performance testing device according to claim 6, characterized in that, The utility system includes a circulating water system, a flushing water system, and a nitrogen blanketing system; The circulating water system includes a circulating water supply pipeline, a circulating water return pipeline, a circulating water buffer tank, and a circulating water pump. The circulating water supply pipeline is connected to the circulating water return pipeline through the circulating water buffer tank and the circulating water pump. The flushing water system includes a production water pipeline, a flushing water buffer tank, and a flushing water pump. The top of the flushing water buffer tank is connected to the production water pipeline, and one end of the flushing water pump is connected to the bottom of the flushing water buffer tank via a pipeline, while the other end is connected to the equipment utility interface. The nitrogen sealing system includes a nitrogen storage tank and a nitrogen buffer tank connected to the nitrogen storage tank via a pipeline, and the top of the nitrogen buffer tank is connected to the equipment utility interface via a pipeline.

8. The skid-mounted mobile carbon dioxide capture and absorbent performance testing device according to claim 7, characterized in that, It also includes a detection and analysis unit and an online monitoring instrument that is electrically connected to the detection and analysis unit; The online monitoring instruments include: a first flue gas flow meter and a first CO2 concentration online monitor installed at the bottom of the Nth absorption tower at the Nth flue gas inlet, used to monitor the flue gas flow rate and carbon dioxide content in the flue gas at the absorption tower inlet, respectively; a second flue gas flow meter and a second CO2 concentration online monitor installed at the top of the first absorption tower at the first flue gas outlet, used to monitor the flue gas flow rate and carbon dioxide content in the flue gas at the absorption tower outlet, respectively; and an energy meter installed in the desorption tower reboiler and a CO2 flow meter installed on the CO2 exhaust pipe at the top of the desorption tail gas washing tank, used to monitor the power consumption of the desorption tower reboiler and the amount of CO2 captured after desorption, respectively. The detection and analysis unit derives the CO2 capture efficiency, CO2 absorption rate, and CO2 desorption energy consumption based on the monitoring parameters obtained by the online monitoring instrument.

9. The skid-mounted mobile carbon dioxide capture and absorbent performance testing device according to claim 8, characterized in that, Also includes: The multi-parameter monitoring sensor installed in the flue gas pretreatment system, the carbon dioxide absorption system, the carbon dioxide desorption system, and the utility system includes an online CO2 concentration monitor, an online SO2 concentration monitor, a temperature sensor, and a pressure sensor, and the multi-parameter monitoring sensor is electrically connected to the detection and analysis unit.

10. The skid-mounted mobile carbon dioxide capture and absorbent performance testing device according to claim 9, characterized in that, The detection and analysis unit includes a calculation and processing module and a data storage module. The data storage module establishes a corresponding database of regional information, fuel type information, environmental variable information and absorbent performance information based on the flue gas channels of different thermal power plants.

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