Artificial photosynthesis multi-reactor integrated system

Abstract

The utility model provides an artificial photosynthesis multi-reactor integrated system. The system comprises a pretreatment unit, a mixing unit, a catalyst regeneration reactor unit and a separation and purification unit, the pretreatment unit is used for pretreating reaction raw materials to obtain mixed gas; the mixing unit is used for further uniformly mixing the mixed gas into raw material gas with uniform proportion; the catalyst regeneration reactor unit is used for receiving the raw material gas and reacting to obtain a mixture; and the separation and purification unit is used for separating the mixture, sending the unreacted raw material gas back to the catalyst regeneration reactor unit and purifying the target product. According to the technical scheme provided by the utility model, raw material supply change and market demand fluctuation can be adapted, various raw materials are used for preparing methanol, and accurate regulation and control on the raw material gas proportion are realized by matching with an optimized process flow and an equipment structure; the flexibility and resource utilization rate of the production process are enhanced while the reaction efficiency and the product purity are improved.

Description

Technical Field

[0001] This utility model relates to the field of chemical production equipment technology, specifically to an integrated system of multiple reactors for artificial photosynthesis. Background Technology

[0002] In current chemical production, different gas-phase reactions often require independent production equipment and processes. For example, in the field of methanol production, the three main routes—CO2 + H2 to methanol, natural gas to syngas and then methanol, and coal gasification to methanol—each have their specific reaction conditions and equipment requirements.

[0003] Generally, methanol is produced by directly using carbon dioxide (CO2) and hydrogen (H2) as raw materials and reacting them under the action of a suitable catalyst. In recent years, with increased attention to carbon capture and utilization (CCU), this method has been considered an effective way to reduce greenhouse gas emissions. However, this method requires a large amount of energy to produce hydrogen of sufficient purity, usually achieved through water electrolysis, which increases costs. Methanol production via natural gas to syngas is one of the most commonly used methanol production processes. First, natural gas is reformed or partially oxidized to syngas composed of carbon monoxide (CO) and hydrogen (H2). Then, under appropriate temperature and pressure conditions, the syngas is converted into methanol through the action of a catalyst. Natural gas is a clean energy source with high conversion efficiency, and the process is relatively mature and stable. However, this method depends on natural gas resources, and geographical location and fluctuations in natural gas prices can affect the economics and sustainability of production. Methanol production via coal gasification involves reacting coal with oxygen and / or steam under high temperature and pressure to produce syngas containing CO and H2, which is then converted into methanol through a catalytic reaction. This method is particularly suitable for regions rich in coal resources.

[0004] Existing production equipment is typically designed for a single reaction pathway, failing to enable flexible switching and synergistic operation of multiple mainstream gas-phase reactions. This not only results in low equipment utilization and large footprint but also lacks sufficient production flexibility in response to changes in raw material supply and market demand fluctuations. Furthermore, existing equipment also has many shortcomings in the precise control of feed gas ratios and the efficient separation and recycling of reaction products during the reaction process, making it difficult to meet the requirements of efficient, green, and sustainable chemical production.

[0005] Therefore, a technical solution is needed that can adapt to changes in raw material supply and fluctuations in market demand, utilize multiple raw materials for methanol production, and, with optimized process flow and equipment structure, achieve precise control of the raw material gas ratio, thereby improving reaction efficiency and product purity while enhancing the flexibility and resource utilization of the production process. Utility Model Content

[0006] This invention aims to provide an integrated multi-reactor system for artificial photosynthesis that can adapt to changes in raw material supply and fluctuations in market demand. It can use multiple raw materials to prepare methanol, and with optimized process flow and equipment structure, it can achieve precise control of the raw material gas ratio, improve reaction efficiency and product purity, and enhance the flexibility and resource utilization of the production process.

[0007] According to one aspect of this utility model, an integrated multi-reactor system for artificial photosynthesis is provided, the system comprising: a pretreatment unit, a mixing unit, a catalyst regeneration reactor unit, and a separation and purification unit.

[0008] The pretreatment unit is used to pretreat the reaction raw materials to obtain a mixed gas containing carbon monoxide (CO), carbon dioxide (CO2) and hydrogen (H2), and to transfer the mixed gas to the mixing unit;

[0009] The mixing unit receives the mixed gas from the pretreatment unit, further mixes the mixed gas into a uniformly proportioned raw material gas, and transmits it to the catalyst regeneration reactor unit.

[0010] The catalyst regeneration reactor unit receives feed gas from the mixing unit. In the catalyst regeneration reactor unit, the feed gas undergoes a chemical reaction to obtain a mixture of the target product and unreacted feed gas, and the mixture is sent to the separation and purification unit.

[0011] The separation and purification unit separates the target product and the unreacted feed gas from the mixture, and sends the unreacted feed gas back to the catalyst regeneration reactor unit to purify the target product and obtain a high-purity product.

[0012] According to some embodiments, the preprocessing unit includes: a first preprocessing subunit and / or a second preprocessing subunit, wherein,

[0013] The first pretreatment subunit is used to pretreat coal to obtain the mixed gas containing carbon monoxide, carbon dioxide, and hydrogen; and / or

[0014] The second pretreatment subunit is used to pretreat the natural gas to obtain the mixture containing carbon monoxide, carbon dioxide and hydrogen.

[0015] According to some embodiments, the mixing unit includes: at least one mixer, a first raw material transport channel, a component sensor, and a second and a third raw material transport channel.

[0016] The mixer receives the mixed gas from the pretreatment unit and further mixes the mixed gas evenly to obtain raw material gas with a uniform mixing ratio.

[0017] The first raw material transmission channel receives the raw material gas from the mixer and transmits the raw material gas to the next mixed gas or the catalyst regeneration reactor unit;

[0018] The second raw material transmission channel and the third raw material transmission channel are respectively connected to the input end of the mixer connected to the catalyst regeneration reactor unit, for feeding carbon dioxide and hydrogen into the mixer respectively;

[0019] The component sensor is disposed on the first raw material transport channel connecting the catalyst regeneration reactor unit and the mixer. The component sensor is used to detect the proportion of mixed components received by the first raw material transport channel, and in conjunction with adjusting the second and third raw material transport channels, adjusts the proportions of each component in the raw material gas. According to some embodiments, the catalyst regeneration reactor unit includes: a catalyst regenerator and at least one reactor, wherein...

[0020] The catalyst regenerator includes a riser, and the catalyst regenerator is connected to the reactor through the riser.

[0021] The reactor includes a first return pipe, through which the reactor is connected to the catalyst regenerator and / or other reactors.

[0022] According to some embodiments, the catalyst regenerator and the reactor further include: a real-time detection sensor and an automatic control device, wherein the system uses detection data from the real-time detection sensor to adjust the automatic control device to ensure the stability of the composition and proportion of the feed gas in the catalyst regenerator and the reactor.

[0023] According to some embodiments, the separation and purification unit includes: a separator and a multi-stage distillation column, wherein,

[0024] The separator includes a second return pipe, which receives a mixture from the catalyst regeneration reactor unit and separates the target product from the mixture, feeding it into the multi-stage distillation column, and then returning the remaining unreacted feed gas to the catalyst regeneration reactor unit through the second return pipe.

[0025] The multi-stage distillation column receives the target product from the separator and performs multi-stage distillation purification on the target product to obtain a high-purity product.

[0026] According to some embodiments, the separator includes a gas-liquid separator.

[0027] According to some embodiments, the reaction raw materials include any one or more of coal, natural gas, and gaseous raw materials, wherein the gaseous raw materials include carbon dioxide and hydrogen.

[0028] According to embodiments of this utility model, the design scheme, by adding the pretreatment unit, enables the system to simultaneously or separately perform multiple mainstream industrial gas-phase reactions, including one or more of coal gas, natural gas, and gaseous raw materials, flexibly adapting to various industrial preparation schemes for raw materials and market resource fluctuations. By adding the catalyst regeneration reactor unit and the separation and purification unit, the process flow and equipment structure are optimized, achieving precise control of the raw material gas ratio, improving reaction efficiency and product purity while enhancing resource utilization.

[0029] It should be understood that the above general description and the following detailed description are merely exemplary and do not limit the present invention. Attached Figure Description

[0030] To more clearly illustrate the technical solutions in the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below.

[0031] Figure 1 A schematic diagram of an integrated multi-reactor system for artificial photosynthesis according to an example embodiment is shown.

[0032] Figure 2 A schematic diagram of an integrated multi-reactor system for artificial photosynthesis is shown according to another exemplary embodiment.

[0033] Figure 3 A flowchart of a method for an integrated multi-reactor system for artificial photosynthesis according to an example embodiment is shown. Detailed Implementation

[0034] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein; rather, they are provided so that this invention will be thorough and complete, and will fully convey the concept of the exemplary embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted.

[0035] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a full understanding of embodiments of the present invention. However, those skilled in the art will recognize that the technical solutions of the present invention can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., may be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of the present invention.

[0036] The block diagrams shown in the accompanying drawings are merely functional entities and do not necessarily correspond to physically independent entities. That is, these functional entities can be implemented in software, in one or more hardware modules or integrated circuits, or in different network and / or processor devices and / or microcontroller devices.

[0037] The flowcharts shown in the accompanying drawings are merely illustrative and do not necessarily include all content and operations / steps, nor do they necessarily have to be performed in the described order. For example, some operations / steps can be broken down, while others can be combined or partially combined; therefore, the actual execution order may change depending on the specific circumstances.

[0038] It should be understood that although the terms first, second, third, etc., may be used herein to describe various components, these components should not be limited by these terms. These terms are used to distinguish one component from another. Therefore, the first component discussed below may be referred to as the second component without departing from the teachings of this utility model. As used herein, the term "and / or" includes all combinations of any one and more of the associated listed items.

[0039] The user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, data stored, data displayed, etc.) involved in this utility model are all information and data authorized by the user or fully authorized by all parties. Furthermore, the collection, use and processing of related data must comply with the relevant laws, regulations and standards of the relevant countries and regions, and corresponding operation entry points are provided for users to choose to authorize or refuse.

[0040] Those skilled in the art will understand that the accompanying drawings are merely schematic diagrams of exemplary embodiments, and the modules or processes in the drawings are not necessarily essential for implementing this utility model, and therefore cannot be used to limit the scope of protection of this utility model.

[0041] In current chemical production, different gas-phase reactions often require independent production equipment and processes. For example, in the field of methanol production, the three main routes—CO2 + H2 to methanol, natural gas to syngas and then methanol, and coal gasification to methanol—each have their specific reaction conditions and equipment requirements.

[0042] Existing production equipment is typically designed for a single reaction pathway, failing to enable flexible switching and synergistic operation of multiple mainstream gas-phase reactions. This not only results in low equipment utilization and large footprint but also lacks sufficient production flexibility in response to changes in raw material supply and market demand fluctuations. Furthermore, existing equipment also has many shortcomings in the precise control of feed gas ratios and the efficient separation and recycling of reaction products during the reaction process, making it difficult to meet the requirements of efficient, green, and sustainable chemical production.

[0043] To address this, this invention proposes an integrated multi-reactor system for artificial photosynthesis, capable of adapting to changes in raw material supply and market demand fluctuations. It utilizes multiple raw materials for methanol production, and with optimized process flow and equipment structure, achieves precise control over the ratio of raw material to gas, improving reaction efficiency and product purity while enhancing production flexibility and resource utilization. According to embodiments, the design of this invention, by adding the pretreatment unit, enables the system to simultaneously or separately perform multiple mainstream industrial gas-phase reactions, including one or more of coal gas, natural gas, and gaseous raw materials, flexibly adapting to various industrial preparation schemes and market resource fluctuations. By adding the catalyst regeneration reactor unit and the separation and purification unit, the process flow and equipment structure are optimized, achieving precise control over the ratio of raw material to gas, improving reaction efficiency and product purity while enhancing resource utilization.

[0044] The following description, in conjunction with the accompanying drawings, illustrates exemplary embodiments of the present invention.

[0045] Figure 1 A schematic diagram of an integrated multi-reactor system for artificial photosynthesis according to an example embodiment is shown.

[0046] See Figure 1 The figure shows an integrated multi-reactor system for artificial photosynthesis, which includes: a pretreatment unit 01, a mixing unit 02, a catalyst regeneration reactor unit 03, and a separation and purification unit 04.

[0047] According to some embodiments, the pretreatment unit 01 is used to pretreat the reaction raw materials to obtain a mixed gas containing carbon monoxide (CO), carbon dioxide (CO2), and hydrogen (H2), and then transfer the mixed gas to the mixing unit 02. The reaction raw materials include any one or more of coal, natural gas, and gaseous raw materials, and the gaseous raw materials include carbon dioxide and hydrogen. Pretreatment of one or more different types of reaction raw materials (such as coal, natural gas, or directly used gaseous raw materials such as carbon dioxide and hydrogen) generates a mixed gas containing carbon monoxide (CO) and hydrogen (H2). By setting up the pretreatment unit 01, the flexibility of the system is improved, enabling it to adapt to methanol production from various raw materials, including but not limited to coal, natural gas, and directly used gaseous raw materials (such as carbon dioxide and hydrogen), allowing the system to flexibly adjust its production strategy according to available resources and market demand.

[0048] According to some embodiments, the mixing unit 02 receives the mixed gas from the pretreatment unit 01, further homogenizes the mixed gas into a uniformly proportioned feed gas, and then transmits it to the catalyst regeneration reactor unit 03. The mixing unit 02 receives the mixed gas from the pretreatment unit 01 and further homogenizes these gases to ensure a uniform composition to meet the requirements of subsequent chemical reactions.

[0049] According to some embodiments, the catalyst regeneration reactor unit 03 receives feed gas from the mixing unit 02. In the catalyst regeneration reactor unit 03, the feed gas undergoes a chemical reaction to obtain a mixture of the target product and unreacted feed gas, and this mixture is then sent to the separation and purification unit. Specifically, the mixing unit 02 first receives uniformly mixed feed gas with a consistent composition, primarily containing carbon monoxide (CO) and hydrogen (H2). Within the catalyst regeneration reactor unit 03, this feed gas participates in specific chemical reactions. Depending on the process design, these reactions can generate various target products. For example, in methanol synthesis, CO and H2 react under the action of a catalyst to produce methanol (CH3OH), possibly accompanied by the generation of water (H2O) and other byproducts. After the reaction is complete, the resulting mixture includes both the desired target product and unreacted feed gas (such as CO and H2). Additionally, some byproducts or impurities may also be present. Subsequently, this mixture containing the target product and unreacted feed gas is sent to the separation and purification unit 04.

[0050] According to some embodiments, the separation and purification unit includes a separator and a multi-stage distillation column, wherein the separator includes a second return pipe. The separation and purification unit 04 separates the target product and the unreacted feed gas from the mixture, and returns the unreacted feed gas to the catalyst regeneration reactor unit 03 to purify the target product, obtaining a high-purity product. Specifically, the separator (e.g., a gas-liquid separator) in the separation and purification unit 04 first separates the gaseous and liquid components from the mixture from the catalyst regeneration reactor unit 03. At this stage, unreacted feed gases (such as carbon monoxide and hydrogen) are typically separated in gaseous form. The separated unreacted feed gas is returned to the catalyst regeneration reactor unit 03 through the second return pipe to participate in the reaction again, which not only improves feed utilization but also reduces waste. The separated liquid target product is then further purified through a series of heating and condensation steps to effectively separate the target product from any possible byproducts or impurities. After purification, a high-purity target product is obtained, ensuring that the quality of the final product meets specific application requirements or market standards. Through the above separation and purification process, not only can unreacted raw material gas be effectively recovered and reintroduced into the reaction system, reducing resource waste, but the target product can also be deeply purified, guaranteeing product quality and improving overall production efficiency and economic benefits while minimizing waste generation and maximizing resource utilization.

[0051] According to some embodiments, the design scheme of this utility model simulates the photosynthetic process in nature through artificial photosynthesis. Under artificial conditions, such as through catalysts, light, high temperature and high pressure, carbon dioxide (CO2) reacts with hydrogen (H2) to produce hydrocarbons. This artificial photosynthetic reaction method can effectively promote the green conversion of carbon dioxide (CO2), efficiently collect energy substances, avoid energy loss in natural systems, and simultaneously alleviate environmental pollution and address the problem of fossil fuel shortages.

[0052] Figure 2 A schematic diagram of an integrated multi-reactor system for artificial photosynthesis is shown according to another exemplary embodiment.

[0053] See Figure 2 The figure illustrates an integrated multi-reactor system for artificial photosynthesis according to an exemplary embodiment. The pretreatment unit 01 includes a first pretreatment subunit 0101 and / or a second pretreatment subunit 0102. The first pretreatment subunit 0101 pretreatments coal to obtain a mixed gas containing carbon monoxide, carbon dioxide, and hydrogen. The second pretreatment subunit 0102 pretreatments natural gas to obtain the mixed gas containing carbon monoxide, carbon dioxide, and hydrogen.

[0054] The first pretreatment subunit is used to pretreat coal by converting it into a mixed gas containing carbon monoxide, carbon dioxide, and hydrogen through coal gasification technology. The coal reacts with limited oxygen and / or steam at high temperatures to produce carbon monoxide, hydrogen, and other byproducts such as carbon dioxide and methane. After purification steps to remove impurities, relatively pure syngas is obtained. The second pretreatment subunit 0102 is used to pretreat natural gas by converting it into a mixed gas containing carbon monoxide, carbon dioxide, and hydrogen through methane reforming technology. Generally, steam methane reforming (SMR) or partial oxidation (POX) processes can be selected. Steam methane reforming involves reacting methane with steam at high temperatures to produce carbon monoxide, carbon dioxide, and hydrogen. Partial oxidation involves the incomplete combustion of methane in the presence of limited oxygen, simultaneously producing carbon monoxide and hydrogen. The resulting gas also requires purification to remove any unwanted byproducts or impurities. Users can flexibly and independently choose the natural gas treatment method according to actual site and environmental requirements.

[0055] According to some embodiments, in actual production scenarios, when coal is selected as the raw material for methanol production, it is fed into the first pretreatment subunit 0101 and undergoes a coal gasification process to generate a mixed gas containing carbon monoxide, carbon dioxide, and hydrogen. When natural gas is selected as the raw material for methanol production, it is fed into the second pretreatment subunit 0102 and undergoes a methane reforming process to generate a mixed gas containing carbon monoxide, carbon dioxide, and hydrogen. After these reactions, the generated mixed gas also needs to be purified to remove any unwanted byproducts or impurities. Then, the mixed gas is further mixed in the mixing unit 02 and then transported to the catalyst regeneration reactor unit 03 for chemical reaction. Optionally, the pretreatment unit 01 may be composed of one or a combination of the first pretreatment subunit 0101 and / or the second pretreatment subunit 0102, or carbon dioxide and hydrogen may be directly fed into the mixing unit 02 as gaseous raw materials for mixing. Users can flexibly select suitable raw materials according to the available resources and convert them into a mixed gas of carbon monoxide and hydrogen suitable for further chemical conversion. This flexible design enables the system to adapt to different market conditions and resource supply, improving the applicability and economy of the system.

[0056] According to some embodiments, the mixing unit 02 includes: at least one mixer 0201 / 0202, a first raw material transfer channel 0203, a component sensor 0207, and a second raw material transfer channel 0205 and a third raw material transfer channel 0206. The mixer 0201 / 0202 receives the mixed gas from the pretreatment unit 01 and further uniformly mixes the mixed gas to obtain a raw material gas with a uniform mixing ratio. Specifically, the mixer 0201 / 0202 receives the mixed gas from the pretreatment unit 01 and further uniformly mixes the mixed gas to obtain a raw material gas with a uniform mixing ratio (e.g., CO2:H2 molar ratio 3:1). Specifically, a high-efficiency mixer is provided to introduce the CO, CO2, and H2 mixed gas generated by the coal pretreatment unit and the natural gas pretreatment unit. The mixers 0201 / 0202 employ a special turbulence structure and mixing method to ensure that the two syngases can be quickly, thoroughly, and uniformly mixed, guaranteeing that the feed gas entering the catalyst regeneration reactor unit 03 has a stable composition, which is beneficial to improving reaction efficiency and product quality.

[0057] According to some embodiments, the first raw material transfer channel 0203 receives the raw material gas from the mixer 0201 and transfers the raw material gas to the next mixed gas 0202 or the catalyst regeneration reactor unit 03. The first raw material transfer channel 0203 acts as a bridge connecting the mixer 0202 with the mixer 0201 and with the catalyst regeneration reactor unit 03, ensuring that the raw material gas can be smoothly and stably transported from one unit to another.

[0058] According to some embodiments, the second raw material transmission channel 0205 and the third raw material transmission channel 0206 are respectively connected to the input end of the mixer 0202 connected to the catalyst regeneration reactor unit 03, for feeding carbon dioxide and hydrogen into the mixer 0202 respectively. The component sensor 0207 is disposed on the first raw material transmission channel 0203 connecting the catalyst regeneration reactor unit 03 and the mixer 0202. The component sensor 0207 is used to detect the proportion of mixed components received by the first raw material transmission channel 0203, and, in conjunction with adjusting the second raw material transmission channel 0205 and the third raw material transmission channel 0206, adjust the proportion of each component of the raw material gas. The component sensor 0207 is installed on the first raw material transmission channel 0203, located after the mixer 0202. It is used to monitor the mixing ratio of the raw material gas in the transmission channel in real time, providing accurate data support so as to adjust the intake of carbon dioxide and hydrogen in the second raw material transmission channel 0205 and the third raw material transmission channel 0206 in a timely manner, thereby adjusting the component ratio of the raw material gas, maintaining the stability of the raw material gas composition, meeting the specific requirements of the catalyst regeneration reactor unit 03 for the composition of the raw material gas, and thus optimizing the entire production process.

[0059] During the process of transporting the raw material gas to the catalyst regeneration reactor unit using the first raw material transmission channel 0203, the composition sensor 0207, the second raw material transmission channel 0205, and the third raw material transmission channel 0206 work together to monitor and adjust the composition ratio of the raw material gas in real time. This achieves precise control of the raw material ratio, ensuring that the raw material gas input to the catalyst regeneration reactor unit has an ideal composition, thereby improving the overall process efficiency and product quality.

[0060] According to some embodiments, the mixing unit 02 further includes: a first regulating valve 0204, disposed on the first raw material transmission channel 0203, located between the mixer 0202 and the catalyst regeneration reactor unit 03, for preventing the raw material gas from flowing back.

[0061] According to some embodiments, the multi-stage reactor unit is designed with multiple reactors connected in series or parallel, which can be flexibly configured according to different gas-phase reaction requirements. See also Figure 2The catalyst regeneration reactor unit 03 includes a catalyst regenerator 0302 and at least one reactor 0301. The catalyst regenerator 0302 includes a riser 03021, which connects the catalyst regenerator 0302 to the reactor 0301. The catalyst regenerator 0302 also includes a feeder 03022 for adding catalyst. The catalyst regenerator 0302 is equipped with the riser 03021, which promotes contact between the gas and the solid catalyst, lifting the solid catalyst from the bottom to the top of the reactor to form a continuous cycle, ensuring sufficient contact between the gas and the catalyst. The connection between the catalyst regenerator 0302 and the reactor 0301 via the riser 03021 helps maintain the continuity and flow of the system, ensuring the smooth entry of the feed gas into the next stage. Specifically, the feed gas first enters the catalyst regenerator 0302, where a preliminary chemical reaction occurs or preliminary chemical reaction conditions are provided, such as preheating or mixing with the catalyst. The design of the riser 03021 helps to enhance the contact effect between the gas and the catalyst, thereby improving the reaction rate and selectivity.

[0062] According to some embodiments, the reactor 0301 includes a first return pipe 03011, which connects the reactor 0301 to the catalyst regenerator 0302 and / or other reactors 0301. Each reactor 0301 is equipped with a first return pipe 03011, allowing unreacted raw material gas or other materials requiring reuse to be returned to the catalyst regenerator 0302 or the preceding reactor 0301 for further reaction. The reactors 0301 and the catalyst regenerator 0302 are connected via the first return pipe 03011, forming a circulation network. This not only improves raw material utilization but also ensures the flexibility and adaptability of the entire system. Specifically, within the reactor 0301, the remaining raw material gas and other components undergo further transformation to generate more target products. The design of the catalyst regeneration reactor unit 03 not only improves raw material utilization and reaction efficiency but also enhances the flexibility of the entire production process. Operating conditions can be flexibly adjusted according to actual needs to meet different production requirements, helping to reduce waste emissions and protect the environment.

[0063] According to some embodiments, the catalyst regenerator 0302 and the reactor 0301 further include: real-time detection sensors and automatic control devices. The system uses detection data from the real-time detection sensors to adjust the automatic control devices to ensure the stability of the raw material gas composition and ratio within the catalyst regenerator 0302 and the reactor 0301. Taking methanol production as an example, real-time detection sensors for CO, H2, and CO2 are installed in the reactor. These sensors monitor the gas composition within the reactor in real time and transmit the data to the control system. The control system, based on a preset optimal raw material gas ratio, precisely controls the input of CO2 and H2 through automatic control devices, such as adjusting the inlet valve, to maintain optimal reaction conditions within the reactor. Different reactors are filled with highly efficient catalysts for different reactions; for example, a copper-based catalyst is used in the methanol synthesis reaction to promote the synthesis of methanol from CO2 + H2. Through this closed-loop control method, the entire production process becomes more intelligent and automated, not only improving production stability and efficiency but also effectively responding to changes caused by raw material fluctuations or other external factors, ensuring the reactor always operates at a high efficiency. Furthermore, selecting appropriate catalysts for different types of reactions can further optimize the reaction process and improve the quality and yield of the target product. When the two work together, they can maximize the use of resources and reduce energy consumption and environmental pollution.

[0064] According to some embodiments, the separation and purification unit includes a separator and a multi-stage distillation column. The separator includes a second return pipe. The separator receives a mixture from the catalyst regeneration reactor unit and separates the target product from the mixture, sending it into the multi-stage distillation column. The remaining unreacted feed gas is then returned to the catalyst regeneration reactor unit via the second return pipe. Specifically, the separator receives a mixture from the catalyst regeneration reactor unit containing the target product, unreacted feed gas, and other possible byproducts or impurities. Separation is performed in the separator, which includes a gas-liquid separator. The reacted mixture enters the gas-liquid separator, where gaseous and liquid substances are efficiently separated using principles such as gravity settling and centrifugal separation. The liquid substances mainly contain the target product (e.g., methanol) and small amounts of other impurities. The separated unreacted feed gas is returned to the catalyst regeneration reactor unit via the second return pipe to participate in the reaction again, which not only improves feed utilization but also reduces waste. The separated target product is then fed into a multi-stage distillation column for further purification.

[0065] According to some embodiments, the multi-stage distillation column receives the target product from the separator and purifies it through multi-stage distillation to obtain a high-purity product. Within the multi-stage distillation column, the target product undergoes a series of heating and condensation processes, achieving separation based on the differences in boiling points of different components. This process effectively removes impurities and improves the purity of the target product. The design of the separation and purification unit 04 not only achieves efficient resource recycling and reduces energy consumption and waste emissions, but also ensures the high quality of the final product.

[0066] Figure 3 A flowchart of a method for an integrated multi-reactor system for artificial photosynthesis according to an example embodiment is shown.

[0067] See Figure 3 It illustrates a method for an integrated multi-reactor system for artificial photosynthesis according to an example embodiment, specifically including the following steps:

[0068] In S301, the raw materials are pretreated to obtain a mixed gas containing carbon monoxide, carbon dioxide and hydrogen.

[0069] According to some embodiments, the raw materials are pretreated to obtain a mixed gas containing carbon monoxide (CO), carbon dioxide (CO2), and hydrogen (H2). The raw materials include any one or more of coal, natural gas, and gaseous feedstocks, wherein the gaseous feedstocks include carbon dioxide and hydrogen. Specifically, different raw materials require different pretreatment methods. For coal, syngas (whose main components are carbon monoxide, carbon dioxide, and hydrogen) is generated through coal gasification technology. For natural gas, the desired mixed gas is produced through a methane reforming process (such as steam methane reforming (SMR) or partial oxidation of POX).

[0070] In S303, the mixed gas is uniformly mixed into a raw material gas with a uniform ratio.

[0071] According to some embodiments, the obtained mixed gas is further homogenized to ensure that the raw material gas entering the reactor has a stable composition, which helps to improve reaction efficiency and product quality.

[0072] In S305, the feed gas undergoes a chemical reaction in the reactor to generate a mixture of the target product and unreacted feed gas.

[0073] According to some embodiments, the uniformly mixed feed gas undergoes a chemical reaction in a reactor to generate a mixture of the target product and unreacted feed gas. Generally, for certain reactions, the efficiency and conversion rate of the chemical reaction can be improved and the energy consumption reduced by using specific catalysts. For example, in methanol synthesis, carbon monoxide and hydrogen react under certain temperature (200℃~300℃) and pressure (8MPa~10MPa) conditions with the aid of a catalyst to produce methanol (CH3OH). For example, copper-based catalysts are commonly used in methanol synthesis to promote the target reaction and improve the conversion rate.

[0074] In S307, the mixture is separated to separate the target product and unreacted feed gas, and the unreacted feed gas is returned to the reactor.

[0075] According to some embodiments, the generated mixture is separated to separate the target product and unreacted raw material gas, and the separated unreacted raw material gas is sent back to the reactor to participate in the reaction again, thereby achieving efficient utilization of resources and reducing preparation costs.

[0076] In S309, the target product is purified by distillation to obtain a high-purity product.

[0077] According to some embodiments, the separated target product is fed into a multi-stage distillation column for distillation purification to remove impurities and obtain a high-purity product. Based on the differences in boiling points of different components, the pure target product is gradually separated through a series of heating and condensation processes to obtain a high-purity product.

[0078] In summary, the above methods can significantly improve the conversion rate of raw materials. Furthermore, the use of advanced control systems and sensor technology ensures the stability and optimization of reaction conditions, contributing to improved product quality and production efficiency.

[0079] Regarding the key points mentioned in this utility model: (1) Setting different raw material sources allows for dynamic selection of different raw material sources based on market prices to maximize profits. (2) Activating the raw materials CO2 and H2 improves reaction efficiency. (3) Recycling and utilizing by-products for cyclical production increases methanol yield. We conducted some market research and experimental verification. The specific details are as follows:

[0080] Simultaneously, setting up different raw material sources allows for dynamic selection of different raw material sources based on market prices, thereby maximizing profits. This can reduce economic fluctuations caused by changes in raw material prices. Taking an annual production capacity of 100,000 tons as an example...

[0081]

[0082]

[0083] The raw materials CO2 and H2 were activated and enhanced, with CO2 undergoing supercritical activation and H2 undergoing ionization activation. Experimental results were obtained and verified as follows:

[0084]

[0085] Note: All other reaction conditions were kept consistent in this experiment, and the catalyst used was a commercially available Cu / ZnO / Al2O3 catalyst.

[0086] By recycling and reusing byproducts in a circular production process aims to increase methanol yield. The catalyst in this system is replaceable. However, commercially available catalysts for CO2 hydrogenation to methanol generally suffer from low methanol product selectivity, low CO2 conversion rates, and the production of byproducts. Therefore, the byproduct recycling and reuse system in this equipment allows for the processing and re-environmental recycling of byproducts, achieving a methanol yield approaching 100%. The following data, calculated based on experimental verification data, represents an annual methanol production of 100,000 tons:

[0087]

[0088]

[0089] According to some embodiments, the design of this utility model can adapt to changes in raw material supply and fluctuations in market demand, and utilize multiple raw materials to produce methanol. Combined with an optimized process flow and equipment structure, it achieves precise control of the raw material gas ratio, improving reaction efficiency and product purity while enhancing the flexibility and resource utilization of the production process.

[0090] According to some embodiments, the design of this utility model, by adding the pretreatment unit, enables the system to simultaneously or separately perform multiple mainstream industrial gas-phase reactions, including one or more of coal gas, natural gas, and gaseous raw materials, flexibly adapting to various industrial preparation schemes for raw materials and market resource fluctuations. By adding the catalyst regeneration reactor unit and the separation and purification unit, the process flow and equipment structure are optimized, enabling precise control of the raw material gas ratio, improving reaction efficiency and product purity while enhancing resource utilization.

[0091] It should be noted that, for the sake of simplicity, the foregoing method embodiments are all described as a series of actions. However, those skilled in the art should understand that the present invention is not limited to the described order of actions, because according to the present invention, some steps can be performed in other orders or simultaneously. Furthermore, those skilled in the art should also understand that the embodiments described in the specification are preferred embodiments, and the actions and modules involved are not necessarily essential to the present invention.

[0092] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0093] In the several embodiments provided by this utility model, it should be understood that the disclosed apparatus can be implemented in other ways. For example, the apparatus embodiments described above are merely illustrative; for instance, the division of units is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or direct coupling or communication connection shown or discussed may be through some service interface; the indirect coupling or communication connection between devices or units may be electrical or other forms.

[0094] The units described as separate components may or may not be physically separate. The components shown as units 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 units can be selected to achieve the purpose of this embodiment according to actual needs.

[0095] Furthermore, in the various embodiments of this utility model, the functional units 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 as a software functional unit.

[0096] If the integrated unit is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage device. Based on this understanding, the technical solution of this utility model, in essence, or the part that contributes to the prior art, or all or part of the technical solution, can be embodied in the form of a software product. This computer software product is stored in a memory and includes several instructions to cause a computer device (which may be a personal computer, server, or network device, etc.) to execute all or part of the steps of the methods of the various embodiments of this utility model.

[0097] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0098] Exemplary embodiments of the present invention have been specifically shown and described above. It should be understood that the present invention is not limited to the detailed structures, arrangements, or implementation methods described herein; rather, the present invention is intended to cover various modifications and equivalent arrangements contained within the spirit and scope of the appended provisions.

Claims

1. A multi-reactor integrated system for artificial photosynthesis, characterized in that, The system includes: a pretreatment unit, a mixing unit, a catalyst regeneration reactor unit, and a separation and purification unit. The pretreatment unit is used to pretreat the reaction raw materials to obtain a mixed gas containing carbon monoxide, carbon dioxide and hydrogen, and to transfer the mixed gas to the mixing unit; The mixing unit receives the mixed gas from the pretreatment unit, further mixes the mixed gas into a uniformly proportioned raw material gas, and transmits it to the catalyst regeneration reactor unit. The catalyst regeneration reactor unit receives feed gas from the mixing unit. In the catalyst regeneration reactor unit, the feed gas undergoes a chemical reaction to obtain a mixture of the target product and unreacted feed gas, and the mixture is sent to the separation and purification unit. The separation and purification unit separates the target product and the unreacted feed gas from the mixture, and sends the unreacted feed gas back to the catalyst regeneration reactor unit to purify the target product and obtain a high-purity product.

2. The integrated multi-reactor system for artificial photosynthesis according to claim 1, characterized in that, The preprocessing unit includes: a first preprocessing subunit and / or a second preprocessing subunit, wherein... The first pretreatment subunit is used to pretreat coal to obtain the mixed gas containing carbon monoxide, carbon dioxide, and hydrogen; and / or The second pretreatment subunit is used to pretreat the natural gas to obtain the mixture containing carbon monoxide, carbon dioxide and hydrogen.

3. The integrated multi-reactor system for artificial photosynthesis according to claim 1, characterized in that, The mixing unit includes: at least one mixer, a first raw material transport channel, a component sensor, and a second and a third raw material transport channel. The mixer receives the mixed gas from the pretreatment unit and further mixes the mixed gas evenly to obtain raw material gas with a uniform mixing ratio. The first raw material transmission channel receives the raw material gas from the mixer and transmits the raw material gas to the next mixed gas or the catalyst regeneration reactor unit; The second raw material transmission channel and the third raw material transmission channel are respectively connected to the input end of the mixer connected to the catalyst regeneration reactor unit, for feeding carbon dioxide and hydrogen into the mixer respectively; The component sensor is installed on the first raw material transmission channel connecting the catalyst regeneration reactor unit and the mixer. The component sensor is used to detect the proportion of mixed components received by the first raw material transmission channel, and to adjust the proportion of each component of the raw material gas in conjunction with the adjustment of the second raw material transmission channel and the third raw material transmission channel.

4. The integrated multi-reactor system for artificial photosynthesis according to claim 1, characterized in that, The catalyst regeneration reactor unit includes: a catalyst regenerator and at least one reactor, wherein... The catalyst regenerator includes a riser, and the catalyst regenerator is connected to the reactor through the riser; The reactor includes a first return pipe, through which the reactor is connected to the catalyst regenerator and / or other reactors.

5. The integrated multi-reactor system for artificial photosynthesis according to claim 4, characterized in that, The catalyst regenerator and the reactor further include: a real-time detection sensor and an automatic control device. The system uses detection data from the real-time detection sensor to adjust the automatic control device to ensure the stability of the composition and proportion of the feed gas in the catalyst regenerator and the reactor.

6. The integrated multi-reactor system for artificial photosynthesis according to claim 4, characterized in that, The catalyst regenerator also includes a feeder for adding the catalyst.

7. The integrated multi-reactor system for artificial photosynthesis according to claim 1, characterized in that, The separation and purification unit includes a separator and a multi-stage distillation column, wherein... The separator includes a second return pipe, which receives a mixture from the catalyst regeneration reactor unit and separates the target product from the mixture, feeding it into the multi-stage distillation column, and then returning the remaining unreacted feed gas to the catalyst regeneration reactor unit through the second return pipe. The multi-stage distillation column receives the target product from the separator and performs multi-stage distillation purification on the target product to obtain a high-purity product.

8. The integrated multi-reactor system for artificial photosynthesis according to claim 7, characterized in that, The separator includes a gas-liquid separator.

9. The integrated multi-reactor system for artificial photosynthesis according to claim 1, characterized in that, The reaction raw materials include one or more of coal, natural gas, and other gaseous raw materials, including carbon dioxide and hydrogen.

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