CO2 in-situ efficient adsorption coupling conversion double-characteristic integral intelligent system and method

Abstract

The invention discloses a CO2 in-situ efficient adsorption coupling conversion double-characteristic integral intelligent system and method, and aims to solve the problems of low CO2 high-temperature adsorbability, low conversion efficiency, poor impurity gas interference resistance and low automation level, an intelligent control unit is utilized to analyze the properties of flue gas and an adsorbent, and the CO2 in-situ efficient adsorption coupling conversion double-characteristic integral intelligent system and method are applied to the field of CO2 purification. The rotating speed and the like of the reaction gas mixing device and the mobile adsorption conversion device are intelligently regulated and improved, so that the device can operate at the optimal rotating speed, the high-temperature adsorption performance and the conversion efficiency of CO2 are remarkably improved, and the stability and the reliability of the reaction process are ensured.

Description

Technical Field

[0001] The present invention belongs to the technical field of CO2 adsorption and conversion, and specifically relates to a dual-characteristic integrated intelligent system and method for CO2 in-situ efficient adsorption and coupled conversion. Background Art

[0002] As one of the main greenhouse gases, the increase in carbon dioxide (CO2) emissions has had a serious impact on the environment. Therefore, the development of efficient CO2 capture and conversion technology has become a hot topic in current research. Traditional CO2 adsorption technology often faces challenges such as weak adsorption under high temperature conditions, low conversion efficiency, and poor sensitivity to interference from impurity gases. In addition, existing conversion systems usually have problems such as low automation level and complex operation, which limits their promotion in industrial applications. In recent years, with the advancement of catalytic technology and materials science, the conversion efficiency of CO2 can be effectively improved by designing materials (adsorbents) with good adsorption properties and catalytic activity. However, while achieving efficient conversion, existing CO2 adsorption conversion systems often lack intelligent control means, which makes it difficult to adjust the reaction conditions in real time, thus affecting the stability and efficiency of the overall system. Summary of the invention

[0003] In view of the above-mentioned deficiencies in the prior art, the present invention provides a dual-characteristic integrated intelligent system and method for in-situ efficient CO2 adsorption and coupled conversion, which solves the problem of low efficiency of CO2 adsorption in the prior art.

[0004] In order to achieve the above-mentioned object of the invention, the technical solution adopted by the present invention is:

[0005] Provided is a CO2 in-situ efficient adsorption coupled conversion dual-characteristic integrated intelligent system, which 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:

[0006] Mobile adsorption conversion device, used for adsorption, heating, conversion and cooling of input flue gas containing CO2;

[0007] A condensation device, used for separating the gas output from the mobile adsorption conversion device by condensation to obtain a product and a circulating gas;

[0008] A storage tank for storing the product obtained from the condensation device;

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

[0010] A gas heating module, used for heating the reaction gas;

[0011] Intelligent control unit for controlling the mobile adsorption conversion unit, condensation unit, storage tank, hydrogenation system and gas heating module.

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

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

[0014] The input end of the b1 region is connected to the output end of the d region, and is used to preheat the rotor in the b1 region below the rotor through the flue gas output from the d region; the flue gas entering the b1 region is mixed with the flue gas containing CO2 adsorbed by the adsorbent on the rotor;

[0015] In the b2 area, the flue gas containing CO2 adsorbed on the rotor is heated again by electric heating so that the temperature of the flue gas containing CO2 adsorbed reaches the conversion temperature;

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

[0017] The input end of the d area receives the input flue gas containing CO2; a part of the flue gas output from the d area enters the gas heating module, where 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 flue gas containing CO2 that has not entered the mobile adsorption conversion device through a pipeline;

[0018] The adsorbent on the wheel can enter area a, area b1, area b2, area c and area d in sequence through rotation; the rotation direction and speed of the wheel are controlled by an intelligent control unit.

[0019] Furthermore, air distribution plates are provided at the air inlets of area a, area b1 and area c; and valves and mass flow meters are provided at the air inlet of area c.

[0020] Furthermore, the gas heating module includes an electric heating unit, which reheats the reaction gas heated by heat exchange so that the reaction gas entering the c area reaches the reaction temperature; the electric heating unit is controlled by the intelligent control unit.

[0021] Furthermore, the rotor is a honeycomb rotor formed by inorganic bonding of corrugated and flat ceramic fiber paper, and the adsorbent is located in the honeycomb.

[0022] Furthermore, the reaction temperature is 300°C.

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

[0024] Furthermore, a CO2 concentration sensor is provided in area a; the CO2 concentration sensor is communicatively connected with the intelligent control unit.

[0025] Furthermore, the flue gas containing CO2 is the 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 50mg / m 3 , PM concentration is less than or equal to 10mg / m 3 .

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

[0027] Adsorb, heat, convert and cool the input flue gas containing CO2;

[0028] Separating the gas output from the mobile adsorption conversion device by condensation to obtain product and circulating gas;

[0029] Storing the product obtained from the condensation device;

[0030] Hydrogenating the circulating gas to form a reaction gas; wherein the reaction gas is used to convert CO2 to generate a product;

[0031] heating the reaction gas;

[0032] Control and manage mobile adsorption conversion units, condensation units, storage tanks, hydrogenation systems and gas heating modules.

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

[0034] 1. In order to solve the problems of weak high-temperature adsorption of CO2, low conversion efficiency, poor resistance to interference from impurity gases and low automation level, the present invention uses an intelligent control unit to analyze the properties of flue gas and adsorbent, and makes intelligent control improvements on the reaction gas mixing and the rotation speed of the mobile adsorption conversion device, so that the present invention can operate at the optimal rotation 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 invention heats the preheating zone and the gas heating module respectively through flue gas, so that the preheating utilization rate of the present invention is high and energy consumption can be saved. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 This is a schematic diagram of the structure of this system;

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

[0038] The specific implementation modes of the present invention are described below so that those skilled in the art can understand the present invention. However, it should be clear that the present invention is not limited to the scope of the specific implementation modes. For those of ordinary skill in the art, as long as various changes are within the spirit and scope of the present invention as defined and determined by the attached claims, these changes are obvious, and all inventions and creations utilizing the concept of the present invention are protected.

[0039] like Figure 1 As shown, the CO2 in-situ efficient adsorption coupled conversion dual-characteristic integrated 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] Mobile adsorption conversion device, used for adsorption, heating, conversion and cooling of input flue gas containing CO2;

[0041] A condensation device, used for separating the gas output from the mobile adsorption conversion device by condensation to obtain a product and a circulating gas;

[0042] A storage tank for storing the product obtained from the condensation device;

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

[0044] A gas heating module, used for heating the reaction gas;

[0045] Intelligent control unit for controlling the mobile adsorption conversion unit, condensation unit, storage tank, hydrogenation system and gas heating module.

[0046] like Figure 2 As shown, the mobile adsorption conversion device includes area a (adsorption zone) for adsorption, area b (heating zone) for heating, area c (conversion zone) for conversion, area d (cooling zone) for cooling, and a rotor; the upper surface of the rotor is provided with an adsorbent for adsorbing CO2; area b includes area b1 (preheating zone) and area b2 (electric heating zone); the four areas a, b, c and d are fan-shaped, forming a circle including the rotor.

[0047] The input end of the a region receives the input flue gas containing CO2; wherein the flue gas containing CO2 entering the a region is adsorbed by the adsorbent on the rotor located in the a region;

[0048] The input end of the b1 region is connected to the output end of the d region, and is used to preheat the rotor in the b1 region below the rotor through the flue gas output from the d region; the flue gas entering the b1 region is mixed with the flue gas containing CO2 adsorbed by the adsorbent on the rotor;

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

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

[0051] The input end of the d area receives the input flue gas containing CO2; a part of the flue gas output from the d area enters the gas heating module, where 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 flue gas containing CO2 that has not entered the mobile adsorption conversion device through a pipeline;

[0052] The adsorbent on the wheel can enter area a, area b1, area b2, area c and area d in turn through rotation; the rotation direction and speed of the wheel are controlled by an intelligent control unit. Air distribution plates are set at the air inlets of area a and area b1.

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

[0054] Enter the conversion zone for reaction. The reaction gas (nitrogen as the balance gas, H2:N2=1:9~3:7) is introduced above the conversion zone and enters the conversion zone through a valve, mass flow meter, and air distribution plate for reaction. The product (methanol) and nitrogen flow out through the pipeline below the conversion zone, and after passing through a condensing device (liquid nitrogen or cold brine), the product is stored in a storage tank. Nitrogen passes through the hydrogenation system to reform the reaction gas, which is heated to 200°C through heat exchange in the gas heating module, and then heated to 300°C through the electric heating unit, so that the reaction gas entering the c area reaches the reaction temperature and re-enters the conversion zone for reaction. The electric heating unit is controlled by an intelligent control unit.

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

[0056] Since the system needs to adsorb the desorbed products again, a cooling zone is set before the adsorption zone. The cooling zone includes an intake system and an exhaust system. The gas in the upper intake system is the flue gas containing CO2 after desulfurization, denitrification and dust removal. After passing through this system, the exhaust gas is discharged at a temperature of 200-300℃ through the exhaust 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] During the specific implementation process, sensors (including CO2 concentration sensors) for monitoring flue gas composition, temperature, humidity, flow rate and other data are set in area a. These sensors are all communicated with the intelligent control unit so that the intelligent control unit can perform real-time analysis on changes in flue gas composition (CO2 concentration) and adjust the operating parameters of the mobile adsorption conversion device as needed.

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

[0059] Adsorbent status monitoring: monitor the saturation, temperature and other indicators 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. The reaction conditions can be adjusted according to the temperature, humidity and oxygen concentration of the flue gas to ensure the best conversion effect;

[0061] Dynamically adjust the reaction rate: Intelligently control the reaction rate by adjusting parameters such as the adsorbent loading and reaction gas flow rate;

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

[0063] Fault prediction and diagnosis: Use intelligent algorithms to predict possible equipment failures or anomalies, perform preventive maintenance in advance, and avoid equipment downtime and output loss.

[0064] In this embodiment, data acquisition and sensor network: install multiple sensors (such as gas sensors, temperature and humidity sensors, flow sensors, etc.) to monitor the system status in real time. Data processing and analysis: use data acquisition systems (such as SCADA systems) to process and analyze real-time data. Prediction and optimization control: based on the data analysis results, use machine learning or other optimization algorithms to predict future working conditions and adjust operating strategies. Automated operation: automatic start, stop, flow adjustment, temperature adjustment and other operations are realized through PLC or other automated control systems.

[0065] 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 30mg / m 3 , the concentration of nitrogen oxides is less than or equal to 50mg / m 3 , PM concentration is less than or equal to 10mg / m 3 .

[0066] In this embodiment, the method based on the dual-property integrated intelligent system of CO2 in-situ efficient adsorption coupled conversion includes the following steps:

[0067] Adsorb, heat, convert and cool the input flue gas containing CO2;

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

[0069] Storing the product obtained from the condensation device;

[0070] Hydrogenating the circulating gas to form a reaction gas; wherein the reaction gas is used to convert CO2 to generate a product;

[0071] heating the reaction gas;

[0072] Control and manage mobile adsorption conversion units, condensation units, storage tanks, hydrogenation systems and gas heating modules.

[0073] In summary, the present invention aims to solve the problems of weak high-temperature adsorption of CO2, low conversion efficiency, poor resistance to interference from impurity gases, and low automation level. By using an intelligent control unit, the properties of flue gas and adsorbent are analyzed, and intelligent regulation and improvement are made to the reaction gas mixing, the rotation speed of the mobile adsorption conversion device, etc., so that the present invention can operate at the optimal rotation 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 dual-characteristic integrated intelligent system for in-situ efficient adsorption and conversion of CO2, characterized in that: It 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; among which: Mobile adsorption conversion device, used for adsorption, heating, conversion and cooling of input flue gas containing CO2; A condensation device, used for separating the gas output from the mobile adsorption conversion device by condensation to obtain a product and a circulating gas; A storage tank for storing the product obtained from the condensation device; A hydrogenation system, used for hydrogenating the circulating gas to form a reaction gas; wherein the reaction gas is used for converting CO2; A gas heating module, used for heating the reaction gas; Intelligent control unit for controlling the mobile adsorption conversion unit, condensation unit, storage tank, hydrogenation system and gas heating module.

2. The CO2 in-situ efficient adsorption coupled conversion dual-characteristic integrated intelligent system according to claim 1 is characterized in that: The mobile adsorption conversion device comprises an a region for adsorption, a b region for heating, a c region for conversion, a d region for cooling, and a rotor; an adsorbent for adsorbing CO2 is arranged on the upper surface of the rotor; the b region comprises a b1 region and a b2 region; The input end of the a region receives the input flue gas containing CO2; wherein the flue gas containing CO2 entering the a region is adsorbed by the adsorbent on the rotor located in the a region; The input end of the b1 region is connected to the output end of the d region, and is used to preheat the rotor in the b1 region below the rotor through the flue gas output from the d region; the flue gas entering the b1 region is mixed with the flue gas containing CO2 adsorbed by the adsorbent on the rotor; In the b2 area, the flue gas containing CO2 adsorbed on the rotor is heated again by electric heating so that the temperature of the flue gas containing CO2 adsorbed reaches the conversion temperature; The input end of the c region receives the reaction gas heated by the gas heating module, and the output end of the c region is connected to the input end of the condensing device; The input end of the d area receives the input flue gas containing CO2; a part of the flue gas output from the d area enters the gas heating module, where 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 flue gas containing CO2 that has not entered the mobile adsorption conversion device through a pipeline; The adsorbent on the wheel can enter area a, area b1, area b2, area c and area d in sequence through rotation; the rotation direction and speed of the wheel are controlled by an intelligent control unit.

3. The CO2 in-situ efficient adsorption coupled conversion dual-characteristic integrated intelligent system according to claim 2 is characterized in that: Air distribution plates are provided at the air inlets of area a, area b1 and area c; valves and mass flow meters are provided at the air inlet of area c.

4. The CO2 in-situ efficient adsorption coupled conversion dual-characteristic integrated intelligent system according to claim 2 is characterized in that: The gas heating module includes an electric heating unit, which reheats the reaction gas heated by heat exchange so that the reaction gas entering the c area reaches the reaction temperature; the electric heating unit is controlled by an intelligent control unit.

5. The CO2 in-situ efficient adsorption coupled conversion dual-characteristic integrated intelligent system according to claim 2 is characterized in that: The rotor is a honeycomb rotor formed by inorganic bonding of corrugated and flat ceramic fiber paper, and the adsorbent is located in the honeycomb.

6. The CO2 in-situ efficient adsorption coupled conversion dual-characteristic integrated intelligent system according to claim 2 is characterized in that: The reaction temperature is 300°C.

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

7.

8. The CO2 in-situ efficient adsorption coupled conversion dual-characteristic integrated intelligent system according to claim 2 is characterized in that: A CO2 concentration sensor is arranged in area a; the CO2 concentration sensor is communicatively connected with the intelligent control unit.

9. The CO2 in-situ efficient adsorption coupled conversion dual-characteristic integrated intelligent system according to claim 2 is characterized in that: 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 30mg / m 3 , the concentration of nitrogen oxides is less than or equal to 50mg / m 3 , PM concentration is less than or equal to 10mg / m 3 .

10. A method based on the CO2 in-situ efficient adsorption coupled conversion dual-characteristic integrated intelligent system according to any one of claims 1 to 9, characterized in that: The following steps are involved: Adsorb, heat, convert and cool the input flue gas containing CO2; Separating the gas output from the mobile adsorption conversion device by condensation to obtain product and circulating gas; Storing the product obtained from the condensation device; Hydrogenating the circulating gas to form a reaction gas; wherein the reaction gas is used to convert CO2 to generate a product; heating the reaction gas; Control and manage mobile adsorption conversion units, condensation units, storage tanks, hydrogenation systems and gas heating modules.

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