Carbon dioxide heat recovery method and system based on dehydrocarbon residual heat

Abstract

The present application relates to the technical field of heat energy recycling in chemical production process, and discloses a carbon dioxide heat recovery method and system based on hydrocarbon removal waste heat, which comprises the following steps: confirming a carbon dioxide heat recovery environment based on a carbon dioxide heat recovery instruction; pretreating harmful raw gas based on a raw gas pretreatment unit and detecting based on a pre-constructed detection device; performing secondary heating on preheated gas based on a pre-constructed electric heater and a catalytic reaction temperature range; performing catalytic reaction on reaction temperature gas based on a hydrocarbon removal purification tower; performing primary heat exchange based on post-reaction gas and a waste heat recovery unit; performing secondary heat exchange based on primary heat exchange recovery gas and the waste heat recovery unit; calculating air flow of a blower based on gas flow; and calculating a catalyst reaction rate constant based on bed average temperature. The present application can improve the comprehensive efficiency, energy utilization rate and system reliability of hydrocarbon removal purification of harmful raw gas and carbon dioxide heat recovery.

Description

Technical Field

[0001] This invention relates to the field of heat energy recovery and utilization technology in chemical production processes, and in particular to a method and system for carbon dioxide heat recovery based on dehydrogenation waste heat. Background Technology

[0002] In industrial production, as the requirements for energy conservation, emission reduction and environmental compliance of carbon dioxide production equipment become increasingly stringent, higher demands are placed on the synergistic improvement of the equipment's heat recovery efficiency and operational stability in order to achieve energy-saving and environmentally friendly industrial production results.

[0003] Existing heat recovery control methods for carbon dioxide production plants have significant limitations: traditional waste heat utilization methods mostly focus on single heat exchange stages, failing to achieve cascaded deep recovery of the multi-grade heat energy contained in the high-temperature gas after the dehydrogenation reaction, and the overall energy utilization efficiency needs to be improved; at the same time, conventional control strategies mostly focus on stabilizing basic parameters such as temperature and flow rate, lacking online diagnosis and control of key factors such as catalyst activity decay and fluctuations in harmful substance components. Therefore, there is an urgent need for an intelligent control method that can integrate cascaded waste heat recovery, real-time optimization of key parameters, and comprehensive system energy efficiency assessment. Summary of the Invention

[0004] This invention provides a carbon dioxide heat recovery method and system based on dehydrogenation waste heat, which can improve the overall efficiency and energy utilization rate of dehydrogenation purification of harmful raw material gases and carbon dioxide heat recovery, ensure system reliability, and achieve energy-saving and environmentally friendly industrial production effects.

[0005] This invention provides a method for carbon dioxide heat recovery based on dehydrocarbonization waste heat, comprising: Confirm receipt of carbon dioxide heat recovery instruction, confirm carbon dioxide heat recovery environment based on carbon dioxide heat recovery instruction, wherein the carbon dioxide heat recovery environment includes carbon dioxide heat recovery system and harmful raw material gas, and the carbon dioxide heat recovery system includes raw material gas pretreatment unit, dehydrocarbonization purification tower and waste heat recovery unit. The harmful raw material gas is pretreated by the raw material gas pretreatment unit and detected by a pre-constructed detection device to obtain the preheated gas, initial temperature, preheated temperature and gas flow rate. The detection device includes a temperature detection device and a flow rate detection device. The catalytic reaction temperature range is obtained, and the preheated gas is reheated based on the pre-constructed electric heater and the catalytic reaction temperature range to obtain the reaction temperature gas. The reaction temperature gas is then subjected to a catalytic reaction based on the dehydrocarbonization purification tower to obtain the post-reaction gas, the post-reaction temperature, and the average bed temperature. Based on the gas after reaction and the waste heat recovery unit, a first heat exchange is performed to obtain the gas recovered by the first heat exchange and the temperature after the first heat exchange. Based on the gas recovered by the first heat exchange and the waste heat recovery unit, a second heat exchange is performed to obtain the temperature after the second heat exchange and the flow rate after the reaction. The heat recovery efficiency is calculated based on the initial temperature, preheated temperature, gas flow rate, post-reaction temperature, post-first heat exchange temperature, post-second heat exchange temperature and post-reaction flow rate. The blower air flow rate is calculated based on the gas flow rate. The catalyst reaction rate constant is calculated based on the average bed temperature. Based on the heat recovery efficiency, blower air flow rate, and catalyst reaction rate constant, the optimized parameters were obtained. Based on the optimized parameters, the carbon dioxide heat recovery of the harmful raw material gas was realized.

[0006] Optionally, the pretreatment of the harmful raw material gas based on the raw material gas pretreatment unit and the detection based on the pre-constructed detection device to obtain the preheated gas, initial temperature, preheated temperature, and gas flow rate includes: Obtain a pretreatment instruction, and receive the pretreatment instruction based on the raw material gas pretreatment unit, wherein the raw material gas pretreatment unit includes a filter and a preheater, and drive the raw material gas pretreatment unit to perform the following operations based on the pretreatment instruction: The harmful raw material gas is filtered using the filtration device to obtain the filtered raw material gas. The temperature of the filtered raw material gas is detected by the temperature detection device to obtain the initial temperature, and the gas flow rate is detected by the flow detection device to obtain the gas flow rate. The filtered raw material gas is preheated using the preheater to obtain preheated gas. The temperature after preheating is obtained based on the temperature detection device and the preheating gas.

[0007] Optionally, the secondary heating of the preheated gas based on a pre-constructed electric heater and the catalytic reaction temperature range to obtain a gas at the reaction temperature includes: The preheated gas is heated by the electric heater to obtain a preheated gas; The temperature of the initially heated gas is detected by the temperature detection device to obtain the initial heating temperature. The upper limit of the catalytic temperature and the lower limit of the catalytic temperature are obtained based on the catalytic reaction temperature range. If the initial heating temperature is less than the lower limit of the catalytic temperature, the initially heated gas is used as a preheating gas, and the process returns to the step of heating the preheating gas based on the electric heater until the initial heating temperature is within the catalytic reaction temperature range, at which point the initially heated gas is confirmed as the reaction temperature gas. If the initial heating temperature is greater than the upper limit of the catalytic temperature, the initial heating gas is allowed to cool statically until the initial heating temperature is within the range of the catalytic reaction temperature, and the initial heating gas is then identified as the reaction temperature gas.

[0008] Optionally, the step of catalytically reacting the gas at the reaction temperature in the dehydrogenation purification tower to obtain the post-reaction gas, the post-reaction temperature, and the average bed temperature includes: The dehydrogenation purification tower receives the gas at the reaction temperature, wherein the dehydrogenation purification tower includes 8 beds and 8 corresponding temperature sensors; The dehydrogenation purification tower is used to catalyze the gas at the reaction temperature, and the temperature of the eight beds is detected by the eight temperature sensors to obtain the gas after reaction and the temperature of the eight beds. The average temperature of the beds is calculated based on the temperature of the eight beds. The temperature after the reaction is obtained based on the temperature detection device and the gas after the reaction.

[0009] Optionally, the step of performing a single heat exchange based on the reaction gas and waste heat recovery unit to obtain the recovered gas and the temperature after the single heat exchange includes: The preheater tube inlet is obtained based on the preheater; The waste heat recovery unit delivers the post-reaction gas to the tube inlet of the preheater, and performs heat exchange with the post-reaction gas and the filtered raw material gas in the preheater to obtain primary heat-recovered gas. The temperature of the gas recovered from the first heat exchange is detected by the temperature detection device to obtain the temperature after the first heat exchange.

[0010] Optionally, the step of performing secondary heat exchange based on the primary heat exchange recovery gas and waste heat recovery unit to obtain the temperature and flow rate after the secondary heat exchange includes: Obtain the regeneration process cold blowing gas, the regeneration cold blowing process tube, and the dehydrogenation regeneration heater; and obtain the dehydrogenation regeneration heater tube inlet based on the dehydrogenation regeneration heater. The regeneration process cold blowing gas is transported to the dehydrogenation regeneration heater via the regeneration cold blowing process tube. The primary heat exchange recovery gas is transported to the tube inlet of the dehydrogenation regeneration heater via the waste heat recovery unit. Heat exchange is performed between the primary heat exchange recovery gas and the regeneration process cold blowing gas in the dehydrogenation regeneration heater to obtain secondary heat exchange gas. The temperature after secondary heat exchange and the flow rate after reaction are obtained by detecting the detection device and the secondary heat exchange gas.

[0011] Optionally, the calculation of heat recovery efficiency based on the initial temperature, preheated temperature, gas flow rate, post-reaction temperature, post-first heat exchange temperature, post-second heat exchange temperature, and post-reaction flow rate includes: The specific heat capacity of the harmful raw material gas and the gas after reaction are measured using a pre-constructed specific heat capacity detection device to obtain the specific heat capacity of the raw material gas and the specific heat capacity of the gas after reaction. The gas density of the harmful raw material gas and the gas after reaction were tested respectively to obtain the density of the raw material gas and the density of the gas after reaction. The heat recovery efficiency is calculated based on the specific heat capacity of the raw gas, the specific heat capacity of the gas after reaction, the density of the raw gas, the density of the gas after reaction, the initial temperature, the temperature after preheating, the gas flow rate, the temperature after reaction, the temperature after the first heat exchange, the temperature after the second heat exchange, and the flow rate after reaction. The calculation formula is as follows: in, Indicates heat recovery efficiency. Indicates the specific heat capacity of the raw material gas. Indicates the density of the raw material gas. Indicates gas flow rate, Indicates the initial temperature. This indicates the temperature after preheating. This indicates the specific heat capacity of the gas after the reaction. This indicates the density of the gas after the reaction. Indicates the flow rate after the reaction. This indicates the temperature after the second heat exchange. This indicates the temperature after one heat exchange. Indicates the temperature after the reaction. Indicates ambient temperature.

[0012] Optionally, the step of calculating the blower air flow rate based on the gas flow rate and calculating the catalyst reaction rate constant based on the average bed temperature includes: The harmful raw material gas is analyzed by a pre-built gas composition detector to obtain multiple harmful gas categories and concentrations. Multiple stoichiometric coefficients are obtained based on multiple pre-built oxidation equations and multiple harmful gas categories. Based on the concentrations of the multiple harmful gases, multiple concentration ratios and a comprehensive concentration of harmful substances are calculated, and multiple weighting coefficients are obtained based on the multiple concentration ratios. Based on the multiple weighting coefficients and multiple stoichiometric coefficients, a comprehensive stoichiometric coefficient is calculated. The blower airflow is calculated based on the comprehensive stoichiometric coefficients, comprehensive hazardous substance concentrations, and gas flow rates, using the following formula: in, Indicates the airflow rate of the blower. Indicates the overall concentration of harmful substances. Represents the overall stoichiometric coefficient. Indicates the magnification factor; Catalyst information is obtained, including the catalyst pre-exponential factor and the activation energy of the reaction. Based on the catalyst information and the average bed temperature, the catalyst reaction rate constant is calculated using the following formula: in, This represents the rate constant of the catalyst reaction. Indicates the pre-exponential factor of the catalyst. Indicates the activation energy of the reaction. Represents the universal gas constant. Represents an exponential function. This indicates the average temperature of the bed.

[0013] Optionally, the optimized parameters obtained by adjusting and optimizing the heat recovery efficiency, blower airflow, and catalyst reaction rate constant include: Obtain the baseline values ​​for heat recovery efficiency, catalyst activity, and real-time blower airflow. Compare the heat recovery efficiency with the heat recovery efficiency benchmark value. If the heat recovery efficiency is less than the heat recovery efficiency benchmark value, then increase the tube side area based on the preheater. By comparing the catalyst activity benchmark value and the catalyst reaction rate constant, if the catalyst activity benchmark value is less than the catalyst reaction rate constant, the lower limit of the catalytic reaction temperature range is increased to obtain the lower limit increase temperature range. Compare the blower airflow rate with the real-time blower airflow rate. If the real-time blower airflow rate is less than the blower airflow rate, increase the power based on the pre-built blower until the real-time blower airflow rate is greater than or equal to the blower airflow rate, thus increasing the blower airflow rate. By summarizing the measures of increasing the tube area, raising the lower limit of the temperature range, and increasing the blower flow rate, the optimized parameters are obtained.

[0014] To achieve the above objectives, the present invention also provides a carbon dioxide heat recovery system based on dehydrogenation waste heat, employing the aforementioned carbon dioxide heat recovery method based on dehydrogenation waste heat, comprising: An environmental verification module is used to verify the receipt of a carbon dioxide heat recovery command and verify the carbon dioxide heat recovery environment based on the command. The carbon dioxide heat recovery environment includes a carbon dioxide heat recovery system and harmful raw material gases. The carbon dioxide heat recovery system includes a raw material gas pretreatment unit, a dehydrocarbonization purification tower, and a waste heat recovery unit. The raw material pretreatment module is used to pretreat the harmful raw material gas based on the raw material gas pretreatment unit, and to detect it based on a pre-constructed detection device to obtain the preheated gas, initial temperature, preheated temperature and gas flow rate, wherein the detection device includes a temperature detection device and a flow rate detection device. The catalytic reaction module is used to obtain the catalytic reaction temperature range, and to reheat the preheated gas based on the pre-constructed electric heater and the catalytic reaction temperature range to obtain the reaction temperature gas. The reaction temperature gas is then subjected to a catalytic reaction based on the dehydrocarbonization purification tower to obtain the post-reaction gas, the post-reaction temperature, and the average bed temperature. The heat exchange calculation module is used to perform a primary heat exchange based on the gas after reaction and the waste heat recovery unit to obtain the gas recovered from the primary heat exchange and the temperature after the primary heat exchange, and to perform a secondary heat exchange based on the gas recovered from the primary heat exchange and the waste heat recovery unit to obtain the temperature after the secondary heat exchange and the flow rate after the reaction. The heat recovery efficiency is calculated based on the initial temperature, preheated temperature, gas flow rate, post-reaction temperature, post-first heat exchange temperature, post-second heat exchange temperature and post-reaction flow rate. The blower air flow rate is calculated based on the gas flow rate. The catalyst reaction rate constant is calculated based on the average bed temperature. Based on the heat recovery efficiency, blower air flow rate, and catalyst reaction rate constant, the optimized parameters were obtained. Based on the optimized parameters, the carbon dioxide heat recovery of the harmful raw material gas was realized.

[0015] To address the above problems, the present invention also provides an electronic device, the electronic device comprising: Memory, storing at least one instruction; The processor executes the instructions stored in the memory to implement the carbon dioxide heat recovery method based on dehydrogenation waste heat described above.

[0016] The present invention also provides a computer-readable storage medium storing at least one instruction, which is executed by a processor in an electronic device to implement the carbon dioxide heat recovery method based on dehydrogenation waste heat described above.

[0017] The method and system of the present invention have the following beneficial effects.

[0018] The present invention discloses a heat recovery control method that first confirms the receipt of a carbon dioxide heat recovery command, and then confirms the carbon dioxide heat recovery environment based on the command. The carbon dioxide heat recovery environment includes a carbon dioxide heat recovery system and hazardous raw material gases. The carbon dioxide heat recovery system includes a raw material gas pretreatment unit, a dehydrogenation purification tower, and a waste heat recovery unit. It is evident that the present invention fully considers the coupling requirements of the exothermic characteristics of the dehydrogenation reaction and the efficient utilization of waste heat during the hazardous raw material gas treatment and carbon dioxide heat recovery process. Therefore, by confirming the heat recovery environment, the system ensures multi-unit collaboration, providing a reliable foundation for subsequent cascade heat exchange and energy closed-loop operation. This, in turn, improves the overall efficiency and economy of hazardous gas purification and heat recovery utilization, achieving energy-saving and environmentally friendly industrial production results.

[0019] The harmful raw material gas is pretreated by the raw material gas pretreatment unit and detected by a pre-constructed detection device to obtain the preheated gas, initial temperature, post-preheated temperature, and gas flow rate. The detection device includes a temperature detection device and a flow rate detection device. This invention introduces a pretreatment and real-time multi-parameter detection mechanism to achieve preliminary purification and accurate thermal characterization of the raw material gas, avoiding the risks of low-temperature reaction efficiency or equipment overload, and thus providing suitable inlet conditions for catalytic dehydrocarbonization. The catalytic reaction temperature range is obtained, and the preheated gas is reheated based on the pre-constructed electric heater and the catalytic reaction temperature range to obtain the reaction temperature gas. The reaction temperature gas is then subjected to a catalytic reaction in the dehydrocarbonization purification tower to obtain the post-reaction gas, post-reaction temperature, and average bed temperature. This invention precisely controls the reaction temperature through secondary heating, ensuring high conversion rate and stability of the catalytic dehydrocarbonization process. Simultaneously, it monitors the bed temperature distribution to prevent catalyst deactivation caused by local overheating or cold spots, thereby improving the dehydrocarbonization purification effect and system safety.

[0020] Based on the post-reaction gas and waste heat recovery unit, a primary heat exchange is performed to obtain the recovered gas and the temperature after the primary heat exchange. A secondary heat exchange is then performed based on the same unit to obtain the temperature and flow rate after the secondary heat exchange. This invention employs a multi-stage, stepped heat exchange design, fully utilizing the high-temperature waste heat released from the dehydrocarbonization reaction to achieve step-by-step heat recovery and utilization, avoiding energy waste caused by direct emission of high-temperature waste gas. This maximizes heat recovery potential and reduces subsequent cooling load. Based on the initial temperature, preheated temperature, gas flow rate, post-reaction temperature, and temperature after the primary heat exchange... The heat recovery efficiency is calculated based on the temperature after secondary heat exchange and the flow rate after reaction. The blower air flow rate is calculated based on the gas flow rate, and the catalyst reaction rate constant is calculated based on the average bed temperature. It can be seen that the present invention realizes the quantitative evaluation and dynamic characterization of the process by calculating the heat recovery efficiency, auxiliary flow rate, and reaction kinetic constant in real time through multi-source thermal parameters, thereby providing scientific data support for system optimization. Based on the heat recovery efficiency, blower air flow rate, and catalyst reaction rate constant, the optimized parameters are obtained. Based on the optimized parameters, the waste heat recovery of carbon dioxide from the harmful raw material gas is realized.

[0021] In summary, this invention introduces a closed-loop adjustment mechanism based on key indicators to form adaptive optimization control, which not only significantly improves heat recovery efficiency but also ensures long-term stable synergy between dehydrocarbonization reaction and waste heat utilization. This can improve the overall efficiency of dehydrocarbonization purification of harmful raw material gases and carbon dioxide heat recovery, as well as energy utilization rate, achieving energy-saving and environmentally friendly industrial production results. Attached Figure Description

[0022] Figure 1 This is a schematic flowchart of a carbon dioxide heat recovery method based on dehydrogenation waste heat provided in an embodiment of the present invention. Figure 2 A functional block diagram of a carbon dioxide heat recovery system based on dehydrocarbonization waste heat provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of an electronic device for implementing the carbon dioxide heat recovery method based on dehydrogenation waste heat, according to an embodiment of the present invention.

[0023] Explanation of reference numerals in the attached figures: 10. Electronic device; 11. Processor; 12. Memory; 13. Bus.

[0024] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0025] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0026] This application provides a method for carbon dioxide heat recovery based on dehydrogenation waste heat. The execution entity of the carbon dioxide heat recovery method based on dehydrogenation waste heat includes, but is not limited to, at least one of the following electronic devices that can be configured to execute the method provided in this application embodiment: a server, a terminal, etc. In other words, the carbon dioxide heat recovery method based on dehydrogenation waste heat can be executed by software or hardware installed on a terminal device or a server device, and the software can be a blockchain platform. The server includes, but is not limited to, a single server, a server cluster, a cloud server, or a cloud server cluster.

[0027] Reference Figure 1 The diagram shown is a schematic flow chart of a carbon dioxide heat recovery method based on dehydrogenation waste heat provided in an embodiment of the present invention. The method includes the following steps.

[0028] S1. Confirm receipt of carbon dioxide heat recovery instruction, and confirm the carbon dioxide heat recovery environment based on the carbon dioxide heat recovery instruction. The carbon dioxide heat recovery environment includes the carbon dioxide heat recovery system and harmful raw material gas. The carbon dioxide heat recovery system includes a raw material gas pretreatment unit, a dehydrocarbonization purification tower, and a waste heat recovery unit.

[0029] It should be explained that the "carbon dioxide heat recovery instruction" refers to the instruction issued by personnel who wish to achieve carbon dioxide heat recovery; the "carbon dioxide heat recovery environment" refers to the necessary environment for achieving carbon dioxide heat recovery; the "carbon dioxide heat recovery system" refers to a system capable of achieving carbon dioxide heat recovery; the carbon dioxide heat recovery system includes a raw material gas pretreatment unit, a hydrocarbon removal and purification tower, and a waste heat recovery unit. For the specific application of these units, please refer to subsequent embodiments. The "harmful raw material gas" refers to raw material gas containing harmful gases that requires oxidation treatment. In this invention, harmful raw material gas refers to production tail gas containing harmful substances such as alcohols, aldehydes, and hydrocarbons. The purpose of this invention is to improve the stability and efficiency of the carbon dioxide heat recovery process.

[0030] For example, a worker operating a production line system issues a carbon dioxide heat recovery command and confirms the carbon dioxide heat recovery environment in order to improve the stability and efficiency of the carbon dioxide heat recovery process.

[0031] S2. The harmful raw material gas is pretreated by the raw material gas pretreatment unit and detected by a pre-constructed detection device to obtain the preheated gas, initial temperature, preheated temperature and gas flow rate, wherein the detection device includes a temperature detection device and a flow rate detection device.

[0032] Furthermore, the pretreatment of the harmful raw material gas by the raw material gas pretreatment unit and the detection by the pre-constructed detection device to obtain the preheated gas, initial temperature, preheated temperature, and gas flow rate include: Obtain a pretreatment instruction, and receive the pretreatment instruction based on the raw material gas pretreatment unit, wherein the raw material gas pretreatment unit includes a filter and a preheater, and drive the raw material gas pretreatment unit to perform the following operations based on the pretreatment instruction: The harmful raw material gas is filtered using the filtration device to obtain the filtered raw material gas. The temperature of the filtered raw material gas is detected by the temperature detection device to obtain the initial temperature, and the gas flow rate is detected by the flow detection device to obtain the gas flow rate. The filtered raw material gas is preheated using the preheater to obtain preheated gas. The temperature after preheating is obtained based on the temperature detection device and the preheating gas.

[0033] Furthermore, the pretreatment command refers to the command issued by the carbon dioxide heat recovery system to drive the raw material gas pretreatment unit to perform pretreatment. The raw material gas pretreatment unit is a functional module capable of pretreating harmful raw material gases, including a filtration device and a preheater. The method of filtering the harmful raw material gases based on the filtration device refers to using the filtration device to filter the harmful raw material gases. The filtered raw material gas refers to the filtered harmful raw material gas. The filtration device is a device in the raw material gas pretreatment unit capable of filtering out solid impurities such as dust and solid particles. Optionally, a filter screen with a pore diameter of less than or equal to 1 μm can be used as the filtration device. The method of detecting the temperature of the filtered raw material gas based on the temperature detection device refers to using the temperature detection device to detect the temperature of the filtered raw material gas, and the temperature detection device is a device capable of detecting gas temperature.

[0034] Optionally, a temperature transmitter can be used as the temperature detection device. The initial temperature refers to the temperature of the filtered raw material gas. The method of detecting the gas flow rate of the filtered raw material gas based on the flow detection device refers to using the flow detection device to detect the volumetric flow rate of the filtered raw material gas. The gas flow rate refers to the volumetric flow rate of the filtered raw material gas, and the flow detection device is a device capable of measuring gas volumetric flow rate. Optionally, a vortex flow meter can be used as the flow detection device. The method of preheating the filtered raw material gas based on the preheater refers to using the preheater to perform heat exchange preheating on the filtered raw material gas. The preheater is a device in the raw material gas pretreatment unit capable of preheating the filtered raw material gas, and the preheater is divided into a tube side and a shell side. When the filtered raw material gas passes through the shell side of the preheater, it can exchange heat with the gas in the tube side (i.e., the gas after subsequent reaction). The preheated gas refers to the filtered raw material gas after preheating treatment. The method for obtaining the preheated temperature based on the temperature detection device and the preheated gas refers to using the temperature detection device to detect the temperature of the preheated gas. The preheated temperature refers to the temperature of the preheated gas.

[0035] S3. Obtain the catalytic reaction temperature range, and reheat the preheated gas based on the pre-constructed electric heater and the catalytic reaction temperature range to obtain the reaction temperature gas. Perform a catalytic reaction on the reaction temperature gas based on the dehydrocarbonization purification tower to obtain the post-reaction gas, the post-reaction temperature, and the average bed temperature.

[0036] It should be explained that the secondary heating of the preheated gas based on the pre-constructed electric heater and the catalytic reaction temperature range to obtain the reaction temperature gas includes: The preheated gas is heated by the electric heater to obtain a preheated gas; The temperature of the initially heated gas is detected by the temperature detection device to obtain the initial heating temperature. The upper limit of the catalytic temperature and the lower limit of the catalytic temperature are obtained based on the catalytic reaction temperature range. If the initial heating temperature is less than the lower limit of the catalytic temperature, the initially heated gas is used as a preheating gas, and the process returns to the step of heating the preheating gas based on the electric heater until the initial heating temperature is within the catalytic reaction temperature range, at which point the initially heated gas is confirmed as the reaction temperature gas. If the initial heating temperature is greater than the upper limit of the catalytic temperature, the initial heating gas is allowed to cool statically until the initial heating temperature is within the range of the catalytic reaction temperature, and the initial heating gas is then identified as the reaction temperature gas.

[0037] Furthermore, the method for obtaining the catalytic reaction temperature range refers to determining the temperature range in which the catalyst used in this invention (CC-20 carbon dioxide dehydrogenation catalyst) and its known characteristics (such as the activity temperature range and the upper limit of thermal stability) can catalyze efficiently without causing catalyst sintering or loss of active components. The catalytic reaction temperature range refers to the temperature range suitable for the catalyst in the dehydrogenation purification tower to undergo a highly efficient catalytic oxidation reaction.

[0038] The method of heating the preheated gas using the electric heater refers to resistive heating of the preheated gas using the electric heater to gradually increase the gas temperature. The purpose of heating the preheated gas is that the above-mentioned preheating operation utilizes the residual heat of the subsequent reaction gas to exchange heat with the filtered raw material gas, thereby preheating it. Although this process can save energy, the temperature is uncontrollable. Therefore, the preheated gas is reheated using the electric heater to raise its temperature to the range of the catalytic reaction temperature, ensuring that the catalytic reaction can be fully carried out after entering the dehydrocarbonization purification tower. The electric heater refers to an electric heating device installed in the preheated gas channel. Optionally, an adjustable-power electric heating rod group or electric heating tube bundle can be used as the electric heater. The preheated gas refers to the preheated gas after preliminary heating by the electric heater. The method of detecting the temperature of the preheated gas using the temperature detection device is the same as the method of detecting the temperature of the filtered raw material gas, and will not be described in detail here. The preliminary heating temperature refers to the temperature of the preheated gas. The lower limit of the catalytic temperature refers to the minimum temperature required to ensure effective catalyst activation and maintain a stable reaction. The upper limit of the catalytic temperature refers to the maximum permissible temperature to avoid catalyst overheating and sintering, rapid activity decay, and bed runaway. If the initial heating temperature is lower than the lower limit of the catalytic temperature, the catalytic reaction stage is not initiated; instead, the gas is treated as a preheating gas and circulated back to the electric heater for continued heating until the temperature enters the catalytic reaction temperature range. If the initial heating temperature is higher than the upper limit of the catalytic temperature, heating is paused, and the gas is allowed to cool naturally in the pipeline until the temperature drops back to the catalytic reaction temperature range. The gas at the reaction temperature refers to the initially heated gas whose temperature has been confirmed to be within the catalytic reaction temperature range.

[0039] It should be understood that the catalytic reaction of the gas at the reaction temperature based on the dehydrogenation purification tower to obtain the post-reaction gas, the post-reaction temperature, and the average bed temperature includes: The dehydrogenation purification tower receives the gas at the reaction temperature, wherein the dehydrogenation purification tower includes 8 beds and 8 corresponding temperature sensors; The dehydrogenation purification tower is used to catalyze the gas at the reaction temperature, and the temperature of the eight beds is detected by the eight temperature sensors to obtain the gas after reaction and the temperature of the eight beds. The average temperature of the beds is calculated based on the temperature of the eight beds. The temperature after the reaction is obtained based on the temperature detection device and the gas after the reaction.

[0040] It should be explained that the dehydrogenation purification tower refers to a fixed-bed catalytic oxidation reactor, used to oxidize organic compounds such as alcohols, aldehydes, and hydrocarbons in harmful raw material gases into carbon dioxide and water under the action of a catalyst. The dehydrogenation purification tower adopts a multi-bed design (eight beds in this invention), which is beneficial for segmented control of reaction exothermics, prevention of local overheating, and improvement of overall conversion rate and thermal stability. Each of the eight beds is filled with catalyst. The eight temperature sensors refer to temperature sensors respectively arranged at the axial midpoint of the eight beds, used to monitor the internal temperature of each bed in real time. The method of catalytically reacting the gas at the reaction temperature based on the dehydrogenation purification tower and detecting the temperature of each of the eight beds based on the eight temperature sensors means using the dehydrogenation purification tower to catalyze the gas at the reaction temperature to generate harmless carbon dioxide (CO2) and water vapor (H2O), and using the eight temperature sensors to measure the temperature of each bed. The eight bed temperatures and the post-reaction gas refer to the temperature of each bed and the gas obtained after the catalytic reaction (mainly water vapor and carbon dioxide), respectively. The method for calculating the average bed temperature based on the eight bed temperatures refers to calculating the average of the eight bed temperatures. The average bed temperature is the average temperature of the eight bed temperatures. The method for obtaining the post-reaction temperature based on the temperature detection device and the post-reaction gas is similar to the method for measuring the pre-heated gas described above, and will not be repeated here. The post-reaction temperature refers to the outlet temperature of the post-reaction gas when it leaves the dehydrocarbonization purification tower.

[0041] S4. Perform a first heat exchange based on the gas after reaction and the waste heat recovery unit to obtain the gas recovered after the first heat exchange and the temperature after the first heat exchange. Perform a second heat exchange based on the gas recovered after the first heat exchange and the temperature after the second heat exchange and the flow rate after the reaction.

[0042] Furthermore, the step of performing a primary heat exchange based on the reaction gas and waste heat recovery unit to obtain the primary heat exchange recovered gas and the temperature after the primary heat exchange includes: The preheater tube inlet is obtained based on the preheater; The waste heat recovery unit delivers the post-reaction gas to the tube inlet of the preheater, and performs heat exchange with the post-reaction gas and the filtered raw material gas in the preheater to obtain primary heat-recovered gas. The temperature of the gas recovered from the first heat exchange is detected by the temperature detection device to obtain the temperature after the first heat exchange.

[0043] The method for obtaining the preheater tube-side inlet based on the preheater refers to locating the interface of the preheater tube-side based on the preheater, wherein the preheater adopts a shell-and-tube heat exchanger structure, the tube side is the channel for the high-temperature reaction gas, and the shell side is the channel for the filtered raw material gas to be preheated. The tube-side inlet refers to the pipe position where the reaction gas enters the preheater tube bundle. The method for transporting the reaction gas to the preheater tube-side inlet based on the waste heat recovery unit refers to directionally transporting the high-temperature reaction gas to the preheater tube-side inlet through pipes and valves installed between the dehydrocarbonization purification tower outlet and the preheater.

[0044] The waste heat recovery unit refers to a functional module connected to the dehydrogenation purification tower, preheater, and dehydrogenation regeneration heater, capable of delivering corresponding gases for heat exchange. The method of heat exchange based on the post-reaction gas and the filtered feed gas in the preheater refers to the process where, as the high-temperature post-reaction gas flows in the tube side, it transfers heat through the tube wall to the low-temperature filtered feed gas flowing counter-currently in the shell side, achieving the initial recovery and utilization of the exothermic reaction. The primary heat exchange recovered gas refers to the post-reaction gas after heat exchange with the filtered feed gas. The method of temperature detection of the primary heat exchange recovered gas based on the temperature detection device refers to using the temperature detection device to detect the temperature of the temperature detection device itself. The temperature after the primary heat exchange refers to the temperature of the primary heat exchange recovered gas.

[0045] It should be explained that the secondary heat exchange based on the primary heat exchange recovery gas and waste heat recovery unit to obtain the temperature and flow rate after the secondary heat exchange includes: Obtain the regeneration process cold blowing gas, the regeneration cold blowing process tube, and the dehydrogenation regeneration heater; and obtain the dehydrogenation regeneration heater tube inlet based on the dehydrogenation regeneration heater. The regeneration process cold blowing gas is transported to the dehydrogenation regeneration heater via the regeneration cold blowing process tube. The primary heat exchange recovery gas is transported to the tube inlet of the dehydrogenation regeneration heater via the waste heat recovery unit. Heat exchange is performed between the primary heat exchange recovery gas and the regeneration process cold blowing gas in the dehydrogenation regeneration heater to obtain secondary heat exchange gas. The temperature after secondary heat exchange and the flow rate after reaction are obtained by detecting the detection device and the secondary heat exchange gas.

[0046] Furthermore, the regeneration process cold-blowing gas refers to the clean gas used to purge the catalyst bed during the periodic regeneration of the dehydrogenation purification tower, such as air, inert gas, or a mixture of gases in a specific ratio. Its function is to remove residual organic matter or moisture during the catalyst regeneration stage, prevent catalyst carbon buildup, and restore catalyst activity. The regeneration cold-blowing process pipe refers to a dedicated pipeline connecting the cold-blowing gas source and the dehydrogenation regeneration heater, including a fan, regulating valve, etc. The dehydrogenation regeneration heater refers to a shell-and-tube heat exchanger specifically used to heat the regeneration cold-blowing gas. Its tube side is the channel for transporting the primary heat exchange recovery gas, and its shell side is the channel for transporting the regeneration process cold-blowing gas. The method of obtaining the dehydrogenation regeneration heater tube-side inlet based on the dehydrogenation regeneration heater refers to using the dehydrogenation regeneration heater to locate the dehydrogenation regeneration heater tube-side inlet, which refers to the inlet of the dehydrogenation regeneration heater tube-side channel. The method of transporting the regeneration process cold-blowing gas to the dehydrogenation regeneration heater based on the regeneration cold-blowing process tube, and the method of transporting the primary heat exchange recovery gas to the tube-side inlet of the dehydrogenation regeneration heater based on the waste heat recovery unit, refers to using the waste heat recovery unit to transport the regeneration process cold-blowing gas to the shell-side channel of the dehydrogenation regeneration heater, and then transporting the primary heat exchange recovery gas to the tube-side channel of the dehydrogenation regeneration heater through the tube-side inlet. The method of heat exchange based on the primary heat exchange recovery gas and the regeneration process cold-blowing gas in the dehydrogenation regeneration heater is similar to the method described above of heat exchange based on the post-reaction gas and the filtered feed gas in the preheater, and will not be elaborated here.

[0047] The secondary heat exchange gas refers to the gas recovered from the primary heat exchange after the second heat exchange. The method for detection based on the detection device and the secondary heat exchange gas is similar to the methods described above for detecting the temperature of the filtered raw material gas based on the temperature detection device and for detecting the gas flow rate of the filtered raw material gas based on the flow rate detection device, and will not be repeated here. The temperature after the secondary heat exchange and the flow rate after the reaction refer to the temperature and volumetric flow rate of the secondary heat exchange gas, respectively.

[0048] S5. Calculate the heat recovery efficiency based on the initial temperature, preheated temperature, gas flow rate, post-reaction temperature, post-first heat exchange temperature, post-second heat exchange temperature, and post-reaction flow rate; calculate the blower air flow rate based on the gas flow rate; and calculate the catalyst reaction rate constant based on the average bed temperature.

[0049] It should be understood that the calculation of heat recovery efficiency based on the initial temperature, preheated temperature, gas flow rate, post-reaction temperature, post-first heat exchange temperature, post-second heat exchange temperature, and post-reaction flow rate includes: The specific heat capacity of the harmful raw material gas and the gas after reaction are measured using a pre-constructed specific heat capacity detection device to obtain the specific heat capacity of the raw material gas and the specific heat capacity of the gas after reaction. The gas density of the harmful raw material gas and the gas after reaction were tested respectively to obtain the density of the raw material gas and the density of the gas after reaction. The heat recovery efficiency is calculated based on the specific heat capacity of the raw gas, the specific heat capacity of the gas after reaction, the density of the raw gas, the density of the gas after reaction, the initial temperature, the temperature after preheating, the gas flow rate, the temperature after reaction, the temperature after the first heat exchange, the temperature after the second heat exchange, and the flow rate after reaction. The calculation formula is as follows: in, Indicates heat recovery efficiency. Indicates the specific heat capacity of the raw material gas. Indicates the density of the raw material gas. Indicates gas flow rate, Indicates the initial temperature. This indicates the temperature after preheating. This indicates the specific heat capacity of the gas after the reaction. This indicates the density of the gas after the reaction. Indicates the flow rate after the reaction. This indicates the temperature after the second heat exchange. This indicates the temperature after one heat exchange. Indicates the temperature after the reaction. Indicates ambient temperature.

[0050] It should be explained that the method of measuring the specific heat capacity of the harmful raw material gas and the post-reaction gas based on the pre-constructed specific heat capacity detection device refers to using the specific heat capacity detection device to detect the specific heat capacity of the harmful raw material gas and the post-reaction gas, respectively. The specific heat capacity of the raw material gas and the specific heat capacity of the post-reaction gas refer to the specific heat capacity of the harmful raw material gas and the post-reaction gas, respectively. The specific heat capacity detection device refers to a dedicated instrument capable of measuring the specific heat capacity of a gas at constant pressure. Optionally, a flow-type specific heat capacity meter can be used as the specific heat capacity detection device. The method of testing the gas density of the harmful raw material gas and the post-reaction gas refers to using a densitometer (such as a vibrating tube densitometer) to measure the gas density of the harmful raw material gas and the post-reaction gas, respectively. The density of the raw material gas and the density of the post-reaction gas refer to the gas density of the harmful raw material gas and the post-reaction gas, respectively. The method of calculating the heat recovery efficiency is to divide the heat recovered by the system (heat recovered in the preheating stage + heat recovered in the secondary heat exchange stage) by the theoretical maximum recoverable heat (i.e., the total heat released by the reaction minus the reference enthalpy at ambient temperature), where the first term in the numerator... This refers to the heat recovered by raising the temperature of the feed gas through a single heat exchange (preheater heat exchange), the second item. This represents the heat further recovered in the secondary heat exchange (hydrocarbon removal regeneration heater heat exchange), denominator This represents the total heat released by the catalytic oxidation reaction (based on the heat released when the gas after the reaction drops from the reaction temperature to the ambient temperature). The ambient temperature refers to the air temperature outside the system, for example, 25°C. The heat recovery efficiency refers to the percentage of heat recovered and effectively utilized in this system (for preheating the feed gas and heating the regeneration gas) relative to the total residual heat carried by the gas exiting the dehydrocarbonization tower (i.e., the gas after the reaction).

[0051] For example, the specific heat capacity of the raw gas was measured to be 1.15 kJ / (kg·K), the density of the raw gas was 1.20 kg / m³, the gas flow rate was 5000 m³ / h, the initial temperature was 40℃, and the temperature after preheating was 280℃; the specific heat capacity of the gas after reaction was 1.28 kJ / (kg·K), the density of the gas after reaction was 1.10 kg / m³, the flow rate after reaction was 4980 m³ / h, the temperature after reaction was 365℃, the temperature after the first heat exchange was 185℃, the temperature after the second heat exchange was 75℃, and the ambient temperature was 25℃. Substituting these values ​​into the formula, the heat recovery efficiency was calculated to be 0.37.

[0052] Furthermore, the calculation of the blower air flow rate based on the gas flow rate and the calculation of the catalyst reaction rate constant based on the average bed temperature include: The harmful raw material gas is analyzed by a pre-built gas composition detector to obtain multiple harmful gas categories and concentrations. Multiple stoichiometric coefficients are obtained based on multiple pre-built oxidation equations and multiple harmful gas categories. Based on the concentrations of the multiple harmful gases, multiple concentration ratios and a comprehensive concentration of harmful substances are calculated, and multiple weighting coefficients are obtained based on the multiple concentration ratios. Based on the multiple weighting coefficients and multiple stoichiometric coefficients, a comprehensive stoichiometric coefficient is calculated. The blower airflow is calculated based on the comprehensive stoichiometric coefficients, comprehensive hazardous substance concentrations, and gas flow rates, using the following formula: in, Indicates the airflow rate of the blower. Indicates gas flow rate, Indicates the overall concentration of harmful substances. Represents the overall stoichiometric coefficient. Indicates the magnification factor; Catalyst information is obtained, including the catalyst pre-exponential factor and the activation energy of the reaction. Based on the catalyst information and the average bed temperature, the catalyst reaction rate constant is calculated using the following formula: in, This represents the rate constant of the catalyst reaction. Indicates the pre-exponential factor of the catalyst. Indicates the activation energy of the reaction. Represents the universal gas constant. Represents an exponential function. This indicates the average temperature of the bed.

[0053] It should be understood that the method for detecting the components of the harmful raw material gas based on the pre-constructed gas component detector refers to using the gas component detector to detect the types of harmful substances and the concentrations of different types of gases in the harmful raw material gas. The multiple types of harmful gases and the multiple concentrations of harmful gases refer to the types and concentrations of harmful substances in the harmful raw material gas. For example, the multiple types of harmful gases are measured to be methane (CH4), ethylene (C2H4), and methanol (CH3OH), and the corresponding concentrations of multiple harmful gases are 2000 mg / m³, 800 mg / m³, and 1500 mg / m³, respectively. The gas component detector refers to a detection device capable of detecting gas components and concentrations. Optionally, a gas chromatograph (GC), mass spectrometer, etc., can be used as the gas component detector.

[0054] The method for obtaining multiple stoichiometric coefficients based on pre-constructed multiple oxidation equations and hazardous gas categories refers to determining the corresponding oxidation equation based on the hazardous gas category. The oxidation equation refers to the complete oxidation reaction formula for each hazardous gas. The stoichiometric coefficient refers to the amount of oxygen required to oxidize one mole of a certain type of hazardous gas, which can be determined based on the coefficients in the oxidation equation. For example, for methanol: CH3OH + 1.5O2 → CO2 + 2H2O, the stoichiometric coefficient is 1.5 (1.5 moles of O2 are required per mole of methanol). The method for calculating multiple concentration ratios and the overall hazardous substance concentration based on the concentrations of the multiple hazardous gases refers to calculating the sum of the concentrations of all hazardous gases (i.e., adding the concentration values ​​of each hazardous gas) to obtain the overall hazardous substance concentration. Then, each hazardous gas concentration is divided by the overall hazardous substance concentration to obtain the concentration ratio corresponding to each hazardous gas. The overall hazardous substance concentration and multiple concentration ratios refer to the sum of the concentrations of the multiple hazardous gases and the ratio of each hazardous gas concentration to the overall hazardous substance concentration, respectively. The method for obtaining multiple weighting coefficients based on the multiple concentration ratios refers to directly using the concentration ratio corresponding to each harmful gas as the weighting coefficient of that harmful gas. The weighting coefficient is a proportional coefficient determined based on the concentration ratio of each harmful gas.

[0055] The method for calculating the comprehensive stoichiometric coefficient based on the multiple weighting coefficients and multiple stoichiometric coefficients refers to multiplying the weighting coefficient corresponding to each harmful gas by the stoichiometric coefficient of that harmful gas to obtain the weighted stoichiometric coefficient of each harmful gas, and then summing all the weighted stoichiometric coefficients. The comprehensive stoichiometric coefficient refers to the comprehensive stoichiometric coefficient obtained by the above weighting calculation. The amplification factor refers to the coefficient set to appropriately increase the air flow rate of the blower, considering that oxygen cannot be fully utilized, for example, 1.1 or 1.2. The air flow rate of the blower refers to the air volume flow rate that ensures sufficient oxygen supply for the catalytic reaction (the oxygen volume fraction in the air is approximately 0.21) and avoids incomplete oxidation due to oxygen deficiency. The catalyst pre-exponential factor and activation energy in the catalyst information are provided by the manufacturer of the CC-20 carbon dioxide dehydrogenation catalyst or experimentally determined (typical activation energy is in the range of 50-90 kJ / mol). The general gas constant is 8.314 J / (mol·K). The catalyst reaction rate constant refers to the reaction rate constant in units of concentration calculated by the above formula (Arrhenius formula). The larger the value, the faster the catalytic reaction of the catalyst.

[0056] S6. Based on the heat recovery efficiency, blower air flow rate and catalyst reaction rate constant, the parameters are adjusted and optimized to obtain the optimized parameters. Based on the optimized parameters, the carbon dioxide heat recovery of the harmful raw material gas is realized.

[0057] It should be explained that the optimized parameters obtained by adjusting and optimizing the heat recovery efficiency, blower airflow, and catalyst reaction rate constant include: Obtain the baseline values ​​for heat recovery efficiency, catalyst activity, and real-time blower airflow. Compare the heat recovery efficiency with the heat recovery efficiency benchmark value. If the heat recovery efficiency is less than the heat recovery efficiency benchmark value, then increase the tube side area based on the preheater. By comparing the catalyst activity benchmark value and the catalyst reaction rate constant, if the catalyst activity benchmark value is less than the catalyst reaction rate constant, the lower limit of the catalytic reaction temperature range is increased to obtain the lower limit increase temperature range. Compare the blower airflow rate with the real-time blower airflow rate. If the real-time blower airflow rate is less than the blower airflow rate, increase the power based on the pre-built blower until the real-time blower airflow rate is greater than or equal to the blower airflow rate, thus increasing the blower airflow rate. By summarizing the measures of increasing the tube area, raising the lower limit of the temperature range, and increasing the blower flow rate, the optimized parameters are obtained.

[0058] Furthermore, the method for obtaining the heat recovery efficiency benchmark value, catalyst activity benchmark value, and real-time blower air flow rate refers to extracting the heat recovery efficiency benchmark value and catalyst activity benchmark value from a pre-constructed database, and then measuring the real-time blower air flow rate using a flow meter. The parameter library refers to a database storing multiple parameters. The heat recovery efficiency benchmark value refers to a preset target value for the long-term stable operation of the system, such as 0.5. The catalyst activity benchmark value refers to the expected reaction rate constant threshold value of the CC-20 carbon dioxide dehydrogenation catalyst under standard operating conditions, provided by the catalyst supplier or obtained through laboratory calibration, for example, a typical value of 0.015–0.030 s⁻¹. The real-time blower air flow rate refers to the actual volumetric air flow rate delivered to the dehydrogenation purification tower by the blower. The method for comparing the heat recovery efficiency and the heat recovery efficiency benchmark value refers to comparing the currently calculated heat recovery efficiency with the benchmark value. If the heat recovery efficiency is less than the benchmark value, it is determined that the current waste heat recovery is insufficient, and the heat transfer efficiency of the primary or secondary heat exchange is low.

[0059] The method for obtaining the increased tube-side area based on the preheater involves first calculating the percentage difference between the heat recovery efficiency and the baseline heat recovery efficiency value. This is done by subtracting the current heat recovery efficiency from the baseline value and then dividing by the current heat recovery efficiency. Next, the contact area between the tube-side and shell-side (the tube-side and shell-side of the preheater and dehydrogenation regeneration heater) is measured. Multiplying the percentage difference between the heat recovery efficiency and the baseline value by the contact area yields the increased tube-side area. This increased tube-side area refers to the calculated increase in contact area, which improves the contact area during heat exchange, thereby increasing the overall heat recovery efficiency. The method for comparing the catalyst activity baseline value and the catalyst reaction rate constant involves comparing the reaction rate constant with the catalyst activity baseline value. If the reaction rate constant is lower than the baseline value, it indicates that the current catalyst activity is low, possibly due to insufficient temperature leading to inadequate activation or slight catalyst deactivation. The method of raising the lower limit of the catalytic reaction temperature range to obtain the lower limit temperature range refers to the system automatically raising the original lower limit of the catalytic temperature by a certain amount (e.g., 10℃ to 30℃) to obtain a new lower limit of the catalytic temperature. This upward adjustment can be manually set, thereby forcing the electric heater to heat the reaction gas to a higher temperature range, ensuring the catalyst is in a more active state, while avoiding a decrease in conversion rate or unstable bed temperature due to excessively low temperature. The method of comparing the blower airflow with the real-time blower airflow refers to comparing the calculated theoretically required blower airflow with the currently measured airflow. If the actual flow is less than the blower airflow, it indicates insufficient oxygen supply, which may lead to incomplete oxidation or an increased risk of catalyst carbon buildup.

[0060] The power increase based on the pre-built blower configuration refers to first subtracting the real-time blower airflow from the current blower airflow, then subtracting the real-time blower airflow again to obtain an increase ratio. The current operating power of the blower is then multiplied by this increase ratio to obtain the required power increase. Based on this required power increase and the blower's specifications, the power is increased until the real-time airflow reaches the required blower airflow. The increased blower airflow refers to the adjusted air supply. The optimized parameters are a combination of increasing the tube area, raising the lower limit of the temperature range, and increasing the blower airflow.

[0061] The advantages of this invention are that it fully considers the coupling requirements of the exothermic characteristics of the dehydrogenation reaction and the efficient utilization of waste heat during the treatment of hazardous raw material gases and carbon dioxide heat recovery. Therefore, by confirming the heat recovery environment, it ensures the synergy of multiple units in the system, providing a reliable foundation for subsequent cascade heat exchange and energy closed-loop. This improves the overall efficiency and economy of hazardous gas purification and energy recovery. Based on the raw material gas pretreatment unit, the hazardous raw material gas is pretreated, and detection is performed using a pre-constructed detection device to obtain the preheated gas, initial temperature, preheated temperature, and gas flow rate. The detection device includes a temperature detection device and a flow rate detection device. Thus, this invention introduces a pretreatment and real-time multi-parameter detection mechanism to achieve preliminary purification and accurate thermal characterization of the raw material gas, avoiding the risks of low-temperature reaction efficiency or equipment overload, and providing suitable inlet conditions for catalytic dehydrogenation. The catalytic reaction temperature range is obtained, and the preheated gas is reheated based on the pre-constructed electric heater and the catalytic reaction temperature range to obtain the reaction temperature gas. The reaction temperature gas is then subjected to a catalytic reaction based on the dehydrogenation purification tower to obtain the post-reaction gas, the post-reaction temperature, and the average bed temperature. It can be seen that the present invention precisely controls the reaction temperature through secondary heating, ensuring high conversion rate and stability of the catalytic dehydrogenation process. At the same time, it monitors the bed temperature distribution to prevent catalyst deactivation caused by local overheating or cold spots, thereby improving the dehydrogenation purification effect and system safety.

[0062] Based on the post-reaction gas and waste heat recovery unit, a primary heat exchange is performed to obtain the gas recovered from the primary heat exchange and the temperature after the primary heat exchange. A secondary heat exchange is then performed based on the same unit to obtain the temperature after the secondary heat exchange and the post-reaction flow rate. This invention employs a multi-stage, stepped heat exchange design, fully utilizing the high-temperature waste heat released from the dehydrogenation reaction to achieve step-by-step heat recovery and utilization, avoiding energy waste caused by direct emission of high-temperature waste gas. This maximizes heat recovery potential and reduces subsequent cooling load. Based on the initial temperature, preheated temperature, gas flow rate, post-reaction temperature, temperature after the primary heat exchange, and the secondary heat exchange unit... The heat recovery efficiency is calculated based on the temperature after the heat exchange and the flow rate after the reaction. The blower air flow rate is calculated based on the gas flow rate, and the catalyst reaction rate constant is calculated based on the average bed temperature. It can be seen that the present invention realizes the quantitative evaluation and dynamic characterization of the process by calculating the heat recovery efficiency, auxiliary flow rate and reaction kinetic constant in real time through multiple source thermal parameters, thereby providing scientific data support for system optimization. Based on the heat recovery efficiency, blower air flow rate and catalyst reaction rate constant, the optimized parameters are obtained. Based on the optimized parameters, the carbon dioxide heat recovery and recycling of the harmful raw material gas is realized.

[0063] It is evident that the present invention introduces a closed-loop adjustment mechanism based on key indicators in the final stage to form adaptive optimization control, which not only significantly improves heat recovery efficiency, but also ensures long-term stable synergy between dehydrogenation reaction and waste heat utilization. Therefore, the present invention can improve the comprehensive efficiency, energy utilization rate and system reliability of dehydrogenation purification of harmful raw material gases and carbon dioxide heat recovery, and meet the requirements of energy conservation and environmental protection for large-scale industrial intelligent production.

[0064] like Figure 2 The diagram shown is a functional block diagram of a carbon dioxide heat recovery system based on dehydrogenation waste heat provided in an embodiment of the present invention.

[0065] The carbon dioxide heat recovery system 100 based on dehydrogenation waste heat described in this invention can be installed in an electronic device. Depending on the functions implemented, the carbon dioxide heat recovery system 100 may include an environmental verification module 101, a raw material pretreatment module 102, a catalytic reaction module 103, and a heat exchange calculation module 104. The module described in this invention can also be called a unit, referring to a series of computer program segments that can be executed by an electronic device processor and perform a fixed function, stored in the memory of the electronic device.

[0066] The environmental verification module 101 is used to verify the receipt of a carbon dioxide heat recovery command and verify the carbon dioxide heat recovery environment based on the carbon dioxide heat recovery command. The carbon dioxide heat recovery environment includes a carbon dioxide heat recovery system and harmful raw material gases. The carbon dioxide heat recovery system includes a raw material gas pretreatment unit, a dehydrocarbonization purification tower, and a waste heat recovery unit. The raw material pretreatment module 102 is used to pretreat the harmful raw material gas based on the raw material gas pretreatment unit, and to detect it based on a pre-constructed detection device to obtain the preheated gas, initial temperature, preheated temperature and gas flow rate. The detection device includes a temperature detection device and a flow rate detection device. The catalytic reaction module 103 is used to obtain the catalytic reaction temperature range, and to perform secondary heating on the preheated gas based on the pre-constructed electric heater and the catalytic reaction temperature range to obtain the reaction temperature gas. The reaction temperature gas is then subjected to a catalytic reaction based on the dehydrocarbonization purification tower to obtain the reaction gas, the reaction temperature, and the average bed temperature. The heat exchange calculation module 104 is used to perform a first heat exchange based on the gas after reaction and the waste heat recovery unit to obtain the gas recovered after the first heat exchange and the temperature after the first heat exchange, and to perform a second heat exchange based on the gas recovered after the first heat exchange and the waste heat recovery unit to obtain the temperature after the second heat exchange and the flow rate after the reaction. The heat recovery efficiency is calculated based on the initial temperature, preheated temperature, gas flow rate, post-reaction temperature, post-first heat exchange temperature, post-second heat exchange temperature and post-reaction flow rate. The blower air flow rate is calculated based on the gas flow rate. The catalyst reaction rate constant is calculated based on the average bed temperature. Based on the heat recovery efficiency, blower air flow rate, and catalyst reaction rate constant, the optimized parameters were obtained. Based on the optimized parameters, the carbon dioxide heat recovery of the harmful raw material gas was realized.

[0067] In detail, the modules in the carbon dioxide heat recovery system 100 based on dehydrogenation waste heat described in this embodiment of the invention employ the same methods as described above during use. Figure 1 The method used is the same as the carbon dioxide heat recovery method based on dehydrogenation waste heat described in the article, and can produce the same technical effect, so it will not be repeated here.

[0068] like Figure 3 The diagram shown is a schematic representation of an electronic device for implementing a carbon dioxide heat recovery method based on dehydrogenation waste heat, according to an embodiment of the present invention.

[0069] The electronic device 1 may include a processor 10, a memory 11 and a bus 12, and may also include a computer program stored in the memory 11 and executable on the processor 10, such as a carbon dioxide heat recovery method program based on dehydrogenation waste heat.

[0070] The memory 11 includes at least one type of readable storage medium, such as flash memory, portable hard drive, multimedia card, card-type memory (e.g., SD or DX memory), magnetic memory, disk, optical disk, etc. In some embodiments, the memory 11 can be an internal storage unit of the electronic device 1, such as the portable hard drive of the electronic device 1. In other embodiments, the memory 11 can be an external storage device of the electronic device 1, such as a plug-in portable hard drive, smart media card (SMC), secure digital card (SD), flash card, etc., equipped on the electronic device 1. Furthermore, the memory 11 includes both internal storage units and external storage devices of the electronic device 1. The memory 11 can be used not only to store application software and various types of data installed on the electronic device 1, such as the code of a carbon dioxide heat recovery method program based on dehydrogenation waste heat, but also to temporarily store data that has been output or will be output.

[0071] In some embodiments, the processor 10 may be composed of integrated circuits, such as a single packaged integrated circuit or multiple integrated circuits with the same or different functions, including combinations of one or more central processing units (CPUs), microprocessors, digital processing chips, graphics processors, and various control chips. The processor 10 is the control unit of the electronic device, connecting various components of the entire electronic device through various interfaces and lines. It executes programs or modules stored in the memory 11 (e.g., a carbon dioxide heat recovery method program based on dehydrogenation waste heat) and calls data stored in the memory 11 to perform various functions of the electronic device 1 and process data.

[0072] The bus 12 can be a peripheral component interconnect (PCI) bus or an extended industry standard architecture (EISA) bus, etc. The bus 12 can be divided into an address bus, a data bus, a control bus, etc. The bus 12 is configured to realize the connection and communication between the memory 11 and at least one processor 10, etc.

[0073] Optionally, the electronic device 1 may further include a user interface, which may be a display, an input unit (such as a keyboard), and optionally, a standard wired interface or a wireless interface. Optionally, in some embodiments, the display may be an LED display, a liquid crystal display, a touch-sensitive liquid crystal display, or an OLED (Organic Light-Emitting Diode) touchscreen, etc. The display may also be appropriately referred to as a screen or display unit, used to display information processed in the electronic device 1 and to display a visual user interface.

[0074] The carbon dioxide heat recovery method program based on dehydrogenation waste heat stored in the memory 11 of the electronic device 1 is a combination of multiple instructions, which, when run in the processor 10, can achieve the following: Confirm receipt of carbon dioxide heat recovery instruction, confirm carbon dioxide heat recovery environment based on carbon dioxide heat recovery instruction, wherein the carbon dioxide heat recovery environment includes carbon dioxide heat recovery system and harmful raw material gas, and the carbon dioxide heat recovery system includes raw material gas pretreatment unit, dehydrocarbonization purification tower and waste heat recovery unit. The harmful raw material gas is pretreated by the raw material gas pretreatment unit and detected by a pre-constructed detection device to obtain the preheated gas, initial temperature, preheated temperature and gas flow rate. The detection device includes a temperature detection device and a flow rate detection device. The catalytic reaction temperature range is obtained, and the preheated gas is reheated based on the pre-constructed electric heater and the catalytic reaction temperature range to obtain the reaction temperature gas. The reaction temperature gas is then subjected to a catalytic reaction based on the dehydrocarbonization purification tower to obtain the post-reaction gas, the post-reaction temperature, and the average bed temperature. Based on the gas after reaction and the waste heat recovery unit, a first heat exchange is performed to obtain the gas recovered by the first heat exchange and the temperature after the first heat exchange. Based on the gas recovered by the first heat exchange and the waste heat recovery unit, a second heat exchange is performed to obtain the temperature after the second heat exchange and the flow rate after the reaction. The heat recovery efficiency is calculated based on the initial temperature, preheated temperature, gas flow rate, post-reaction temperature, post-first heat exchange temperature, post-second heat exchange temperature and post-reaction flow rate. The blower air flow rate is calculated based on the gas flow rate. The catalyst reaction rate constant is calculated based on the average bed temperature. Based on the heat recovery efficiency, blower air flow rate, and catalyst reaction rate constant, the optimized parameters were obtained. Based on the optimized parameters, the carbon dioxide heat recovery of the harmful raw material gas was realized.

[0075] Specifically, the processor 10's implementation method for the above instructions can be found in [reference needed]. Figures 1 to 3 The descriptions of the relevant steps in the corresponding embodiments are not repeated here.

[0076] Furthermore, if the modules / units integrated in the electronic device 1 are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. The computer-readable storage medium can be volatile or non-volatile. For example, the computer-readable medium may include: any entity or device capable of carrying the computer program code, a recording medium, a USB flash drive, a portable hard drive, a magnetic disk, an optical disk, a computer memory, or a read-only memory (ROM).

[0077] The present invention also provides a computer-readable storage medium storing a computer program, which, when executed by a processor of an electronic device, can perform the following: Confirm receipt of carbon dioxide heat recovery instruction, confirm carbon dioxide heat recovery environment based on carbon dioxide heat recovery instruction, wherein the carbon dioxide heat recovery environment includes carbon dioxide heat recovery system and harmful raw material gas, and the carbon dioxide heat recovery system includes raw material gas pretreatment unit, dehydrocarbonization purification tower and waste heat recovery unit. The harmful raw material gas is pretreated by the raw material gas pretreatment unit and detected by a pre-constructed detection device to obtain the preheated gas, initial temperature, preheated temperature and gas flow rate. The detection device includes a temperature detection device and a flow rate detection device. The catalytic reaction temperature range is obtained, and the preheated gas is reheated based on the pre-constructed electric heater and the catalytic reaction temperature range to obtain the reaction temperature gas. The reaction temperature gas is then subjected to a catalytic reaction based on the dehydrocarbonization purification tower to obtain the post-reaction gas, the post-reaction temperature, and the average bed temperature. Based on the gas after reaction and the waste heat recovery unit, a first heat exchange is performed to obtain the gas recovered by the first heat exchange and the temperature after the first heat exchange. Based on the gas recovered by the first heat exchange and the waste heat recovery unit, a second heat exchange is performed to obtain the temperature after the second heat exchange and the flow rate after the reaction. The heat recovery efficiency is calculated based on the initial temperature, preheated temperature, gas flow rate, post-reaction temperature, post-first heat exchange temperature, post-second heat exchange temperature and post-reaction flow rate. The blower air flow rate is calculated based on the gas flow rate. The catalyst reaction rate constant is calculated based on the average bed temperature. Based on the heat recovery efficiency, blower air flow rate, and catalyst reaction rate constant, the optimized parameters were obtained. Based on the optimized parameters, the carbon dioxide heat recovery of the harmful raw material gas was realized.

[0078] In the embodiments provided by this invention, it should be understood that the disclosed devices, systems, and methods can be implemented in other ways. For example, the system embodiments described above are merely illustrative, and actual implementations may have other classification methods.

[0079] The modules described as separate components may or may not be physically separate. The components shown as modules may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0080] Furthermore, the functional modules in the various embodiments of the present invention can be integrated into one processing unit, or each unit can exist physically separately, or two or more units can be integrated into one unit. The integrated unit can be implemented in hardware or in the form of hardware plus software functional modules.

[0081] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention.

Claims

1. A method for carbon dioxide heat recovery based on dehydrocarbonization waste heat, characterized in that, The method includes: Confirm receipt of carbon dioxide heat recovery instruction, confirm carbon dioxide heat recovery environment based on carbon dioxide heat recovery instruction, wherein the carbon dioxide heat recovery environment includes carbon dioxide heat recovery system and harmful raw material gas, and the carbon dioxide heat recovery system includes raw material gas pretreatment unit, dehydrocarbonization purification tower and waste heat recovery unit. The harmful raw material gas is pretreated by the raw material gas pretreatment unit and detected by a pre-constructed detection device to obtain the preheated gas, initial temperature, preheated temperature and gas flow rate. The detection device includes a temperature detection device and a flow rate detection device. The catalytic reaction temperature range is obtained, and the preheated gas is reheated based on the pre-constructed electric heater and the catalytic reaction temperature range to obtain the reaction temperature gas. The reaction temperature gas is then subjected to a catalytic reaction based on the dehydrocarbonization purification tower to obtain the post-reaction gas, the post-reaction temperature, and the average bed temperature. Based on the gas after reaction and the waste heat recovery unit, a first heat exchange is performed to obtain the gas recovered by the first heat exchange and the temperature after the first heat exchange. Based on the gas recovered by the first heat exchange and the waste heat recovery unit, a second heat exchange is performed to obtain the temperature after the second heat exchange and the flow rate after the reaction. The heat recovery efficiency is calculated based on the initial temperature, preheated temperature, gas flow rate, post-reaction temperature, post-first heat exchange temperature, post-second heat exchange temperature and post-reaction flow rate. The blower air flow rate is calculated based on the gas flow rate. The catalyst reaction rate constant is calculated based on the average bed temperature. Based on the heat recovery efficiency, blower air flow rate, and catalyst reaction rate constant, the optimized parameters were obtained. Based on the optimized parameters, the carbon dioxide heat recovery of the harmful raw material gas was realized.

2. The carbon dioxide heat recovery method based on dehydrocarbonization waste heat as described in claim 1, characterized in that, The process of pretreating the harmful raw material gas using the raw material gas pretreatment unit and detecting it using a pre-constructed detection device to obtain the preheated gas, initial temperature, post-preheated temperature, and gas flow rate includes: Obtain a pretreatment instruction, and receive the pretreatment instruction based on the raw material gas pretreatment unit, wherein the raw material gas pretreatment unit includes a filter and a preheater, and drive the raw material gas pretreatment unit to perform the following operations based on the pretreatment instruction: The harmful raw material gas is filtered using the filtration device to obtain the filtered raw material gas. The temperature of the filtered raw material gas is detected by the temperature detection device to obtain the initial temperature, and the gas flow rate is detected by the flow detection device to obtain the gas flow rate. The filtered raw material gas is preheated using the preheater to obtain preheated gas. The temperature after preheating is obtained based on the temperature detection device and the preheating gas.

3. The carbon dioxide heat recovery method based on dehydrocarbonization waste heat as described in claim 1, characterized in that, The secondary heating of the preheated gas based on a pre-constructed electric heater and the catalytic reaction temperature range to obtain a gas at the reaction temperature includes: The preheated gas is heated by the electric heater to obtain a preheated gas; The temperature of the initially heated gas is detected by the temperature detection device to obtain the initial heating temperature. The upper limit of the catalytic temperature and the lower limit of the catalytic temperature are obtained based on the catalytic reaction temperature range. If the initial heating temperature is less than the lower limit of the catalytic temperature, the initially heated gas is used as a preheating gas, and the process returns to the step of heating the preheating gas based on the electric heater until the initial heating temperature is within the catalytic reaction temperature range, at which point the initially heated gas is confirmed as the reaction temperature gas. If the initial heating temperature is greater than the upper limit of the catalytic temperature, the initial heating gas is allowed to cool statically until the initial heating temperature is within the range of the catalytic reaction temperature, and the initial heating gas is then identified as the reaction temperature gas.

4. The carbon dioxide heat recovery method based on dehydrocarbonization waste heat as described in claim 1, characterized in that, The process of catalytically reacting the gas at the reaction temperature using the dehydrogenation purification tower to obtain the post-reaction gas, post-reaction temperature, and average bed temperature includes: The dehydrogenation purification tower receives the gas at the reaction temperature, wherein the dehydrogenation purification tower includes 8 beds and 8 corresponding temperature sensors; The dehydrogenation purification tower is used to catalyze the gas at the reaction temperature, and the temperature of the eight beds is detected by the eight temperature sensors to obtain the gas after reaction and the temperature of the eight beds. The average temperature of the beds is calculated based on the temperature of the eight beds. The temperature after the reaction is obtained based on the temperature detection device and the gas after the reaction.

5. The carbon dioxide heat recovery method based on dehydrocarbonization waste heat as described in claim 1, characterized in that, The process of performing a single heat exchange based on the reacted gas and waste heat recovery unit to obtain the recovered gas and the temperature after the single heat exchange includes: The preheater tube inlet is obtained based on the preheater; The waste heat recovery unit delivers the post-reaction gas to the tube inlet of the preheater, and performs heat exchange with the post-reaction gas and the filtered raw material gas in the preheater to obtain primary heat-recovered gas. The temperature of the gas recovered from the first heat exchange is detected by the temperature detection device to obtain the temperature after the first heat exchange.

6. The carbon dioxide heat recovery method based on dehydrocarbonization waste heat as described in claim 1, characterized in that, The process of performing secondary heat exchange based on the primary heat exchange recovery gas and waste heat recovery unit to obtain the temperature and flow rate after the secondary heat exchange includes: Obtain the regeneration process cold blowing gas, the regeneration cold blowing process tube, and the dehydrogenation regeneration heater; and obtain the dehydrogenation regeneration heater tube inlet based on the dehydrogenation regeneration heater. The regeneration process cold blowing gas is transported to the dehydrogenation regeneration heater via the regeneration cold blowing process tube. The primary heat exchange recovery gas is transported to the tube inlet of the dehydrogenation regeneration heater via the waste heat recovery unit. Heat exchange is performed between the primary heat exchange recovery gas and the regeneration process cold blowing gas in the dehydrogenation regeneration heater to obtain secondary heat exchange gas. The temperature after secondary heat exchange and the flow rate after reaction are obtained by detecting the detection device and the secondary heat exchange gas.

7. The carbon dioxide heat recovery method based on dehydrocarbonization waste heat as described in claim 1, characterized in that, The calculation of heat recovery efficiency based on the initial temperature, preheated temperature, gas flow rate, post-reaction temperature, post-first heat exchange temperature, post-second heat exchange temperature, and post-reaction flow rate includes: The specific heat capacity of the harmful raw material gas and the gas after reaction are measured using a pre-constructed specific heat capacity detection device to obtain the specific heat capacity of the raw material gas and the specific heat capacity of the gas after reaction. The gas density of the harmful raw material gas and the gas after reaction were tested respectively to obtain the density of the raw material gas and the density of the gas after reaction. The heat recovery efficiency is calculated based on the specific heat capacity of the raw gas, the specific heat capacity of the gas after reaction, the density of the raw gas, the density of the gas after reaction, the initial temperature, the temperature after preheating, the gas flow rate, the temperature after reaction, the temperature after the first heat exchange, the temperature after the second heat exchange, and the flow rate after reaction. The calculation formula is as follows: in, Indicates heat recovery efficiency. Indicates the specific heat capacity of the raw material gas. Indicates the density of the raw material gas. Indicates gas flow rate, Indicates the initial temperature. This indicates the temperature after preheating. This indicates the specific heat capacity of the gas after the reaction. This indicates the density of the gas after the reaction. Indicates the flow rate after the reaction. This indicates the temperature after the second heat exchange. This indicates the temperature after one heat exchange. Indicates the temperature after the reaction. Indicates ambient temperature.

8. The carbon dioxide heat recovery method based on dehydrocarbonization waste heat as described in claim 1, characterized in that, The calculation of blower air flow rate based on the gas flow rate and the calculation of catalyst reaction rate constant based on the average bed temperature include: The harmful raw material gas is analyzed by a pre-built gas composition detector to obtain multiple harmful gas categories and concentrations. Multiple stoichiometric coefficients are obtained based on multiple pre-built oxidation equations and multiple harmful gas categories. Based on the concentrations of the multiple harmful gases, multiple concentration ratios and a comprehensive concentration of harmful substances are calculated, and multiple weighting coefficients are obtained based on the multiple concentration ratios. Based on the multiple weighting coefficients and multiple stoichiometric coefficients, a comprehensive stoichiometric coefficient is calculated. The blower airflow is calculated based on the comprehensive stoichiometric coefficients, comprehensive hazardous substance concentrations, and gas flow rates, using the following formula: in, Indicates the airflow rate of the blower. Indicates the overall concentration of harmful substances. Represents the overall stoichiometric coefficient. Indicates the magnification factor; Catalyst information is obtained, including the catalyst pre-exponential factor and the activation energy of the reaction. Based on the catalyst information and the average bed temperature, the catalyst reaction rate constant is calculated using the following formula: in, This represents the rate constant of the catalyst reaction. Indicates the pre-exponential factor of the catalyst. Indicates the activation energy of the reaction. Represents the universal gas constant. Represents an exponential function. This indicates the average temperature of the bed.

9. The carbon dioxide heat recovery method based on dehydrocarbonization waste heat as described in claim 8, characterized in that, The optimized parameters are obtained by adjusting and optimizing the heat recovery efficiency, blower airflow, and catalyst reaction rate constant, including: Obtain the baseline values ​​for heat recovery efficiency, catalyst activity, and real-time blower airflow. Compare the heat recovery efficiency with the heat recovery efficiency benchmark value. If the heat recovery efficiency is less than the heat recovery efficiency benchmark value, then increase the tube side area based on the preheater. By comparing the catalyst activity benchmark value and the catalyst reaction rate constant, if the catalyst activity benchmark value is less than the catalyst reaction rate constant, the lower limit of the catalytic reaction temperature range is increased to obtain the lower limit increase temperature range. Compare the blower airflow rate with the real-time blower airflow rate. If the real-time blower airflow rate is less than the blower airflow rate, increase the power based on the pre-built blower until the real-time blower airflow rate is greater than or equal to the blower airflow rate, thus increasing the blower airflow rate. By summarizing the measures of increasing the tube area, raising the lower limit of the temperature range, and increasing the blower flow rate, the optimized parameters are obtained.

10. A carbon dioxide heat recovery system based on dehydrocarbonization waste heat, characterized in that, The apparatus employing the carbon dioxide heat recovery method based on dehydrocarbonization waste heat according to claim 1 comprises: An environmental verification module is used to verify the receipt of a carbon dioxide heat recovery command and verify the carbon dioxide heat recovery environment based on the command. The carbon dioxide heat recovery environment includes a carbon dioxide heat recovery system and harmful raw material gases. The carbon dioxide heat recovery system includes a raw material gas pretreatment unit, a dehydrocarbonization purification tower, and a waste heat recovery unit. The raw material pretreatment module is used to pretreat the harmful raw material gas based on the raw material gas pretreatment unit, and to detect it based on a pre-constructed detection device to obtain the preheated gas, initial temperature, preheated temperature and gas flow rate, wherein the detection device includes a temperature detection device and a flow rate detection device. The catalytic reaction module is used to obtain the catalytic reaction temperature range, and to reheat the preheated gas based on the pre-constructed electric heater and the catalytic reaction temperature range to obtain the reaction temperature gas. The reaction temperature gas is then subjected to a catalytic reaction based on the dehydrocarbonization purification tower to obtain the post-reaction gas, the post-reaction temperature, and the average bed temperature. The heat exchange calculation module is used to perform a primary heat exchange based on the gas after reaction and the waste heat recovery unit to obtain the gas recovered from the primary heat exchange and the temperature after the primary heat exchange, and to perform a secondary heat exchange based on the gas recovered from the primary heat exchange and the waste heat recovery unit to obtain the temperature after the secondary heat exchange and the flow rate after the reaction. The heat recovery efficiency is calculated based on the initial temperature, preheated temperature, gas flow rate, post-reaction temperature, post-first heat exchange temperature, post-second heat exchange temperature and post-reaction flow rate. The blower air flow rate is calculated based on the gas flow rate. The catalyst reaction rate constant is calculated based on the average bed temperature. Based on the heat recovery efficiency, blower air flow rate, and catalyst reaction rate constant, the optimized parameters were obtained. Based on the optimized parameters, the carbon dioxide heat recovery of the harmful raw material gas was realized.

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