A CO2 in-situ efficient adsorption coupling conversion double-property integrated intelligent system and method

Abstract

The application discloses a kind of CO2 In-situ efficient adsorption coupling conversion double-property integrated intelligent system and method, the present application is aimed at CO2 Weak high-temperature adsorption, low conversion efficiency, poor anti-interference of impurity gas, low automation level problem, using intelligent control unit, the property of flue gas and adsorbent is analyzed, reaction gas mixing, mobile adsorption conversion device speed etc. Intelligent control improvement is made, so that the application can operate at the best speed, thereby significantly improving the high-temperature adsorption performance and conversion efficiency of CO2, ensure the stability and reliability of reaction process.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of CO2 adsorption conversion, and particularly relates to a CO2 in-situ high-efficiency adsorption coupling conversion dual-property integrated intelligent system and method. BACKGROUND

[0002] Carbon dioxide (CO2) is one of the main greenhouse gases, and its increasing emission has caused serious environmental impact. Therefore, developing efficient CO2 capture and conversion technology has become a hot research topic. Traditional CO2 adsorption technology often faces challenges such as weak adsorption under high temperature conditions, low conversion efficiency, and poor sensitivity to impurity gas interference. In addition, existing conversion systems usually have low automation level and complex operation, which limits their promotion in industrial applications. In recent years, with the progress of catalytic technology and material science, by designing materials (adsorbents) with good adsorption performance and catalytic activity, the conversion efficiency of CO2 can be effectively improved. However, existing CO2 adsorption conversion systems often lack intelligent control means while achieving high conversion efficiency, making it difficult to adjust the reaction conditions in real time, thereby affecting the stability and efficiency of the overall system. SUMMARY

[0003] In view of the above deficiencies in the prior art, the CO2 in-situ high-efficiency adsorption coupling conversion dual-property integrated intelligent system and method provided by the application solves the problem of low CO2 adsorption efficiency in the prior art.

[0004] To achieve the above-mentioned purposes, the technical solution adopted by the application is as follows:

[0005] A CO2 in-situ high-efficiency adsorption coupling conversion dual-property integrated intelligent system is provided, which comprises a mobile adsorption conversion device, an intelligent control unit, a condensing device, a storage tank, a gas heating module, a hydrogenation system, and a flue gas circulation system; wherein:

[0006] The mobile adsorption conversion device is used for adsorbing, heating, converting, and cooling the input flue gas containing CO2;

[0007] The condensing device is used for separating the gas output from the mobile adsorption conversion device by condensation to obtain products and circulating gas;

[0008] The storage tank is used for storing the products obtained by the condensing device;

[0009] The hydrogenation system is used for hydrogenating the circulating gas to form reaction gas; wherein the reaction gas is used for converting CO2;

[0010] The gas heating module is used for heating the reaction gas;

[0011] The intelligent control unit is used for controlling and managing the mobile adsorption conversion device, the condensing device, the storage tank, the hydrogenation system and the gas heating module.

[0012] Further, the mobile adsorption conversion device comprises a region a for adsorption, a region b for heating, a region c for conversion, a region d for cooling, and a rotating wheel; the upper surface of the rotating wheel is provided with an adsorbent for adsorbing CO2; the region b comprises a region b1 and a region b2;

[0013] The input end of the region a receives the input flue gas containing CO2; wherein the flue gas containing CO2 entering the region a is adsorbed by the adsorbent on the rotating wheel in the region a;

[0014] The input end of the region b1 is connected to the output end of the region d, so that the flue gas output by the region d preheats the rotating wheel in the region b1 below the rotating wheel; the flue gas entering the region b1 is mixed with the flue gas containing CO2 adsorbed by the adsorbent on the rotating wheel;

[0015] The region b2 re-heats the flue gas containing CO2 adsorbed on the rotating wheel therein by electric heating, so that the temperature of the flue gas containing CO2 adsorbed reaches the conversion temperature;

[0016] The input end of the region c receives the reaction gas heated by the gas heating module, and the output end of the region c is connected to the input end of the condensing device;

[0017] The input end of the region d receives the input flue gas containing CO2; part of the flue gas output by the region d enters the gas heating module, and the reaction gas entering the gas heating module is heated by heat exchange in the gas heating module; the flue gas entering the gas heating module is mixed with the flue gas containing CO2 not entering the mobile adsorption conversion device through a pipeline;

[0018] Wherein the adsorbent on the rotating wheel can enter the region a, the region b1, the region b2, the region c and the region d in turn by rotation; the rotating direction and speed of the rotating wheel are controlled by the intelligent control unit.

[0019] Further, the air inlet of the region a, the region b1 and the region c is provided with a wind distribution plate; the air inlet of the region c is provided with a valve and a mass flow meter.

[0020] Further, the gas heating module comprises an electric heating unit, which re-heats the reaction gas heated by heat exchange, so that the reaction gas entering the region c reaches the reaction temperature; the electric heating unit is controlled by the intelligent control unit.

[0021] Further, the rotating wheel is a honeycomb-shaped rotating wheel formed by inorganic bonding of corrugated and flat ceramic fiber paper, and the adsorbent is located in the honeycomb.

[0022] Further, the reaction temperature is 300 DEG C.

[0023] Further, the circulating gas is nitrogen, and the ratio of hydrogen to nitrogen in the reaction gas is 1:9-3:7.

[0024] Further, a CO2 concentration sensor is arranged in the a region; the CO2 concentration sensor is in communication connection with the intelligent control unit.

[0025] Further, the CO2-containing flue gas is CO2-containing flue gas after desulfurization, denitration and dust removal; the concentration of sulfur dioxide in the CO2-containing flue gas is less than or equal to 30 mg / m 3 , the concentration of nitrogen oxides is less than or equal to 50 mg / m 3 , and the PM concentration is less than or equal to 10 mg / m 3 .

[0026] A method based on CO2 in-situ efficient adsorption coupling conversion dual-property integrated intelligent system is provided, which comprises the following steps:

[0027] The input CO2-containing flue gas is adsorbed, heated, converted and cooled;

[0028] The gas output from the mobile adsorption conversion device is separated by condensation to obtain products and circulating gas;

[0029] The products obtained by the condensing device are stored;

[0030] The circulating gas is hydrogenated to form a reaction gas; wherein the reaction gas is used for converting CO2 to generate products;

[0031] The reaction gas is heated;

[0032] The mobile adsorption conversion device, the condensing device, the storage tank, the hydrogenation system and the gas heating module are controlled.

[0033] The beneficial effects of the present application are:

[0034] 1、The present application aims at the problems of weak high-temperature adsorption of CO2, low conversion efficiency, poor anti-interference of impurity gas and low automation level, uses an intelligent control unit to analyze the properties of flue gas and adsorbent, intelligently controls and improves the mixing of reaction gas, the rotating speed of the mobile adsorption conversion device and the like, so that the present application can operate at the optimal rotating speed, thereby significantly improving the high-temperature adsorption performance and conversion efficiency of CO2 and ensuring the stability and reliability of the reaction process.

[0035] 2、The present application heats the preheating zone and the gas heating module by flue gas respectively, so that the preheating utilization rate of the present application is high, and energy consumption can be saved. BRIEF DESCRIPTION OF DRAWINGS

[0036] Figure 1 Figure 1 is a structural schematic diagram of the system;

[0037] Figure 2 Figure 2 is a sectional view of the mobile adsorption conversion device. DETAILED DESCRIPTION

[0038] The specific embodiments of the present application are described below to facilitate the understanding of the present application for those skilled in the art, but it should be clear that the present application is not limited to the scope of the specific embodiments, and for those skilled in the art, it is obvious that various changes are within the spirit and scope of the present application defined and determined by the appended claims, and all the inventions utilizing the concept of the present application are within the scope of protection.

[0039] As shown in Figure 1 , the CO2 in-situ efficient adsorption coupled conversion dual-property overall intelligent system includes a mobile adsorption conversion device, an intelligent control unit, a condensing device, a storage tank, a gas heating module, a hydrogenation system, and a flue gas circulation system; wherein:

[0040] The mobile adsorption conversion device is used for adsorbing, heating, converting, and cooling the input flue gas containing CO2;

[0041] The condensing device is used for separating the gas output from the mobile adsorption conversion device by condensation to obtain products and circulating gas;

[0042] The storage tank is used for storing the products obtained by the condensing device;

[0043] The hydrogenation system is used for hydrogenating the circulating gas to form reaction gas; wherein the reaction gas is used for converting CO2;

[0044] The gas heating module is used for heating the reaction gas;

[0045] The intelligent control unit is used for controlling the mobile adsorption conversion device, the condensing device, the storage tank, the hydrogenation system, and the gas heating module.

[0046] As shown in Figure 2 , the mobile adsorption conversion device includes an a region (adsorption zone) for adsorption, a b region (heating zone) for heating, a c region (conversion zone) for conversion, a d region (cooling zone) for cooling, and a runner; the upper surface of the runner is provided with an adsorbent for adsorbing CO2; the b region includes a b1 region (pre-heating zone) and a b2 region (electric heating zone); the a, b, c, and d four regions are fan-shaped, constituting a circle containing the runner.

[0047] The input end of the a area receives input CO2-containing flue gas; wherein the CO2-containing flue gas entering the a area is adsorbed by the adsorbent on the wheel;

[0048] The input end of the b1 area is connected to the output end of the d area, for preheating the wheel in the b1 area by the flue gas output by the d area; the flue gas entering the b1 area is mixed with the CO2-containing flue gas adsorbed by the adsorbent on the wheel;

[0049] The b2 area is heated by electric heating, so that the temperature of the CO2-containing flue gas adsorbed on the wheel reaches the conversion temperature;

[0050] The input end of the c area receives the reaction gas heated by the gas heating module, and the output end of the c area is connected to the input end of the condensing device;

[0051] The input end of the d area receives input CO2-containing flue gas; part of the flue gas output by the d area enters the gas heating module, and the reaction gas entering the gas heating module is heated by heat exchange; the flue gas entering the gas heating module is mixed with the CO2-containing flue gas not entering the mobile adsorption conversion device through a pipeline;

[0052] The adsorbent on the wheel enters the a area, the b1 area, the b2 area, the c area and the d area in turn by rotation; the rotation direction and speed of the wheel are controlled by the intelligent control unit. The air distribution plate is arranged at the gas inlet of the a area and the b1 area.

[0053] In this embodiment, the CO2-containing flue gas with stable temperature, humidity and concentration enters the adsorption area, and the CO2 in the flue gas is adsorbed by the adsorbent on the wheel. When the adsorbent on the adsorption area tends to be saturated, the wheel enters the heating area. The preheating area in the heating area is heated by the flue gas from the cooling area, and the heating temperature is about 200℃. The electric heating area further heats the adsorbed CO2-containing flue gas to 300℃.

[0054] The reaction gas (nitrogen as a balance gas, H2:N2=1:9~3:7) is introduced into the conversion area, and the reaction is carried out. The product (methanol) and nitrogen flow out through the pipeline below the conversion area, and after passing through the condensing device (liquid nitrogen or cold brine), the product is stored in the storage tank. The nitrogen passes through the hydrogenation system, and the reaction gas is heated to 200℃ by heat exchange in the gas heating module, and then heated to 300℃ by the electric heating unit, so that the reaction gas entering the c area reaches the reaction temperature and reenters the conversion area for reaction. The electric heating unit is controlled by the intelligent control unit.

[0055] In this embodiment, the rotating wheel is a honeycomb-shaped rotating wheel formed by corrugated and flat ceramic fiber paper through inorganic bonding, and the adsorbent is located in the honeycomb.

[0056] Since the desorption products of the system will be adsorbed again, a cooling zone is provided before the adsorption zone. The cooling zone includes an air inlet system and an air outlet system. The gas in the air inlet system above is the CO2-containing flue gas after desulfurization, denitrification and dust removal. After passing through the system, the temperature of the exhaust flue gas is 200-300℃, which is discharged through the air outlet system below and is divided into two paths through valve control. One pipeline leads to the gas heating module to heat the reaction gas. The other pipeline leads to the preheating zone to heat the adsorbed flue gas.

[0057] In the specific implementation process, a sensor (including a CO2 concentration sensor) for monitoring the composition, temperature, humidity, flow rate and other data of the flue gas is arranged in the a area. These sensors are in communication connection with the intelligent control unit, so that the intelligent control unit can analyze the changes of the flue gas composition (CO2 concentration) in real time and adjust the operating parameters of the mobile adsorption conversion device as needed.

[0058] In addition, the intelligent control unit can also perform:

[0059] Adsorbent state monitoring: monitor the saturation and temperature of the adsorbent through sensors; Regular regeneration or replacement: when the catalytic effect of the adsorbent decreases, the adsorbent can be replaced;

[0060] Temperature and reaction control: reaction temperature is crucial to conversion efficiency, and reaction conditions can be adjusted according to the temperature, humidity and oxygen concentration of the flue gas to ensure optimal conversion effect;

[0061] Dynamic adjustment of reaction rate: by adjusting the load of the adsorbent, the flow rate of the reaction gas and other parameters, the intelligent control of the reaction rate is realized;

[0062] Load self-adaptation: adjust the system operation mode according to real-time monitoring data and production needs, such as increasing or decreasing the flow of the fan;

[0063] Fault prediction and diagnosis: use intelligent algorithms to predict possible faults or abnormalities of the equipment, and perform preventive maintenance in advance to avoid equipment downtime and production loss.

[0064] In this embodiment, data collection and sensor network: install various sensors (such as gas sensors, temperature and humidity sensors, flow sensors, etc.) to monitor system status in real time. Data processing and analysis: use data collection system (such as SCADA system) to process and analyze real-time data. Prediction and optimization control: based on data analysis results, use machine learning or other optimization algorithms to predict future working conditions and adjust operation strategy. Automatic operation: through PLC or other automation control system to realize automatic start, stop, flow adjustment, temperature adjustment and other operations.

[0065] The flue gas containing CO2 is flue gas containing CO2 after desulfurization, denitrification and dust removal; the concentration of sulfur dioxide in the flue gas containing CO2 is less than or equal to 30 mg / m 3 , the concentration of nitrogen oxides is less than or equal to 50 mg / m 3 , and the concentration of PM is less than or equal to 10 mg / m 3 .

[0066] In this embodiment, the method of the overall intelligent system based on CO2 in-situ high-efficiency adsorption coupling conversion dual characteristics includes the following steps:

[0067] Adsorbing, heating, converting and cooling the input flue gas containing CO2;

[0068] Separating the gas output from the mobile adsorption conversion device by condensation to obtain products and circulating gas;

[0069] Storing the products obtained by the condensing device;

[0070] Hydrogenating the circulating gas to form reaction gas; wherein the reaction gas is used for converting CO2 to generate products;

[0071] Heating the reaction gas;

[0072] Controlling the mobile adsorption conversion device, the condensing device, the storage tank, the hydrogenation system and the gas heating module.

[0073] In summary, the present application aims at the problems of weak high-temperature adsorption of CO2, low conversion efficiency, poor resistance to impurity gas interference and low automation level, uses an intelligent control unit to analyze the properties of flue gas and adsorbent, intelligently controls the mixing of reaction gas, the speed of mobile adsorption conversion device, etc. The present application can run at the best speed, thereby significantly improving the high-temperature adsorption performance and conversion efficiency of CO2 and ensuring the stability and reliability of the reaction process.

Claims

1. A CO2 in-situ high-efficiency adsorption coupled conversion dual-property integrated intelligent system, characterized in that, The mobile adsorption conversion device, the intelligent control unit, the condensing device, the storage tank, the gas heating module, the hydrogenation system and the flue gas circulation system are included. The mobile adsorption conversion device is used for adsorbing, heating, converting and cooling the input flue gas containing CO2. The condensing device is used for separating the gas output from the mobile adsorption conversion device by condensation to obtain products and circulating gas. The storage tank is used for storing the products obtained by the condensing device. The hydrogenation system is used for hydrogenating the circulating gas to form reaction gas, wherein the reaction gas is used for converting CO2. The gas heating module is used for heating the reaction gas. The intelligent control unit is used for controlling the mobile adsorption conversion device, the condensing device, the storage tank, the hydrogenation system and the gas heating module. The mobile adsorption conversion device includes a region a for adsorption, a region b for heating, a region c for conversion, a region d for cooling, and a rotating wheel. The input end of the region a receives the input flue gas containing CO2. The input end of the region b1 is connected to the output end of the region d, and the flue gas output by the region d is used to preheat the rotating wheel in the region b1. The region b2 re-heats the flue gas containing CO2 adsorbed on the rotating wheel by electric heating, so that the temperature of the flue gas containing CO2 reaches the conversion temperature. The input end of the region c receives the reaction gas heated by the gas heating module, and the output end of the region c is connected to the input end of the condensing device. The input end of the region d receives the input flue gas containing CO2. The rotating wheel on the rotating wheel can enter the region a, the region b1, the region b2, the region c and the region d in turn.

2. The CO2 in-situ high-efficient adsorption coupled conversion dual- property monolithic intelligent system according to claim 1, characterized in that, The rotating wheel is a honeycomb-shaped rotating wheel formed by corrugated and flat ceramic fiber paper through inorganic bonding, and the adsorbent is located in the honeycomb.

3. The CO2 in-situ high-efficient adsorption coupled conversion dual- property monolithic intelligent system according to claim 1, characterized in that, The reaction temperature is 300 DEG C.

4. The CO2 in-situ high-efficient adsorption coupled conversion dual- property monolithic intelligent system according to claim 1, characterized in that, The circulating gas is nitrogen, and the ratio of hydrogen to nitrogen in the reaction gas is 1:9-3:

7.

5. The CO2 in-situ high-efficient adsorption coupled conversion dual- property monolithic smart system according to claim 1, characterized in that, A CO2 concentration sensor is arranged in the region a, and the CO2 concentration sensor is in communication connection with the intelligent control unit.

6. The CO2 in-situ high-efficient adsorption coupled conversion dual- property monolithic smart system according to claim 1, characterized in that, The method comprises the following steps:

7. The CO2 in-situ high-efficient adsorption coupled conversion dual- property monolithic smart system according to claim 1, characterized in that, ​ 8. The CO2 in-situ high-efficient adsorption coupled conversion dual- property monolithic intelligent system according to claim 1, characterized in that, The flue gas containing CO2 is flue gas containing CO2 after desulfurization, denitration and dust removal; the concentration of sulfur dioxide in the flue gas containing CO2 is less than or equal to 30 mg / m 3 , the concentration of nitrogen oxides is less than or equal to 50 mg / m 3 , and the concentration of PM is less than or equal to 10 mg / m 3 .

9. A method based on the CO2 in-situ high-efficiency adsorption coupled conversion double-property integrated whole intelligent system according to any one of claims 1-8, characterized in that, ​ adsorbing, heating, converting and cooling the input CO2-containing flue gas; separating the output gas from the mobile adsorption conversion device by condensation to obtain a product and a recycle gas; storing the product obtained by the condensation device; hydrogenating the recycle gas to form a reaction gas; wherein the reaction gas is used for converting CO2 to generate a product; heating the reaction gas; controlling the mobile adsorption conversion device, the condensation device, the storage tank, the hydrogenation system and the gas heating module.

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