Efficient carbon reduction and carbon sequestration system based on comprehensive energy utilization of thermal power plant factory

Abstract

According to the efficient carbon reduction and carbon sequestration system based on comprehensive energy utilization of the thermal power plant factory, thermal power and the plant factory are deeply fused, waste heat of the power plant is used for supplying heat to a temperature control system of the plant factory, and gradient utilization of the waste heat is achieved; power plant solid waste is converted into a substrate cultivation carrier and a trace element supplement source of a plant factory, and the added value of the solid waste is increased; a water resource circulating purification technology is adopted, so that efficient circulation of treated water in the plant factory is ensured; carbon dioxide in flue gas of a power plant is used for providing a carbon source for plants, and resource utilization of carbon dioxide is achieved; residual purified carbon dioxide in the flue gas is converted into an alcohol compound through photovoltaic electric energy by a high-pressure carbon dioxide electrolysis system alcohol compound synthesis technology, so that electrocatalytic recycling from carbon dioxide to organic matters is realized; clean energy is provided for the plant factory by means of the energy storage system, carbon emission is further reduced, and an innovative solution is provided for energy conservation, emission reduction and sustainable development of the thermal power industry.

Description

Technical Field

[0001] The present invention relates to the technical field of comprehensive utilization of thermal power, and in particular to a high-efficiency carbon reduction and carbon fixation system based on comprehensive energy utilization of thermal power plant factories. Background Art

[0002] Thermal power has always occupied an important position in the global energy supply. In the past few decades, thermal power technology has continued to develop, the capacity of units has continued to increase, and the power generation efficiency has gradually improved. For example, the application of ultra-supercritical units has significantly improved the efficiency of coal-fired power generation, reducing coal consumption and pollutant emissions per unit of power generation. However, thermal power still faces severe challenges. As one of the main sources of carbon emissions, it faces huge pressure to reduce carbon emissions in the context of global response to climate change. With increasingly stringent environmental protection requirements, thermal power companies need to continuously explore new energy-saving and emission reduction technologies and approaches to achieve sustainable development.

[0003] Plant factories are efficient agricultural systems that achieve continuous year-round production of crops through high-precision environmental control. In recent years, plant factory technology has developed rapidly, and great progress has been made in environmental control such as light, temperature, humidity, and nutrient solution. The application of LED lighting technology makes light regulation more precise, and can provide appropriate spectrum and light intensity according to the growth needs of different plants. At the same time, the automation control system is constantly improving, which can realize real-time monitoring and precise regulation of various environmental parameters in plant factories. The development of plant factories helps to improve land utilization, ensure the stability of agricultural product supply, and produce higher-quality and safer agricultural products.

[0004] At present, although thermal power companies have made some progress in energy conservation and emission reduction, they still have problems such as insufficient waste heat utilization, single solid waste treatment method, low water resource recycling rate and limited means of carbon dioxide emission reduction. For example, a large amount of waste heat is usually simply discharged and cannot be effectively used in other industrial or agricultural production processes; solid wastes such as fly ash and slag are mainly used in the production of low-end building materials with low added value; power plant treated water has not been fully and efficiently recycled, resulting in waste of water resources; carbon dioxide emission reduction in flue gas mainly relies on traditional carbon capture technology, which is costly and lacks effective resource utilization methods;

[0005] Therefore, the art is in urgent need of an efficient carbon reduction and carbon fixation system based on comprehensive energy utilization of thermal power plant factories to solve the above problems. Summary of the invention

[0006] The present invention provides a high-efficiency carbon reduction and carbon fixation system based on comprehensive energy utilization of thermal power plant factories, aiming to solve the above problems; by deeply integrating thermal power and plant factories, the waste heat of power plants is used to heat the temperature control system of plant factories, thereby realizing the cascade utilization of waste heat; the solid waste of power plants is converted into substrate cultivation carriers and trace element supplement sources of plant factories, thereby increasing the added value of solid waste; water resource circulation and purification technology is adopted to ensure the efficient circulation of power plant treated water in the plant factory; the carbon dioxide in the flue gas of power plants is used to provide a carbon source for plants, thereby realizing the resource utilization of carbon dioxide; the surplus purified carbon dioxide in the flue gas is converted into alcohol compounds through the high-pressure strong carbon dioxide electrolysis system alcohol compound synthesis technology, and the carbon dioxide is converted into alcohol compounds through photovoltaic electric energy, thereby realizing the electrocatalytic recycling of carbon dioxide to organic matter; at the same time, photovoltaic solar energy and energy storage systems are used to provide clean energy for plant factories, thereby further reducing the carbon emissions of the system, and providing innovative solutions for energy conservation, emission reduction and sustainable development in the thermal power industry.

[0007] The present invention provides a high-efficiency carbon reduction and carbon fixation system based on comprehensive energy utilization of thermal power plant factories, comprising:

[0008] The waste heat recovery and cascade utilization module is connected to the waste heat end of the power plant and the plant factory to collect the waste heat of the power plant and utilize it in a cascade manner to provide heat for the temperature control system of the plant factory;

[0009] Intelligent lighting control module, which is set in the plant factory to monitor plant needs and adjust the light source power accordingly;

[0010] The solid waste resource deep utilization module is connected to the solid waste terminal of the power plant and the plant factory to pre-treat the solid waste of the power plant and adjust the application amount of solid waste to balance the trace element needs of the plants;

[0011] A water resource circulation and purification module, which is connected to the wastewater end of the power plant and the plant factory, is used to circulate and purify the treated water of the power plant, determine the purification efficiency index, and adjust the water supply to the plant factory based on the purification efficiency index;

[0012] A flue gas carbon capture supply module, which is connected to the flue gas end of the power plant and the plant factory, is used to capture carbon dioxide in the flue gas and adjust the flow of carbon dioxide delivered to different areas of the plant factory;

[0013] The carbon dioxide electrocatalytic utilization module reacts the purified carbon dioxide with water, uses high-pressure strong electrolysis, and uses working condition spectroscopy to achieve carbon species coupling and directional conversion to produce alcohol-like carbon-based compounds;

[0014] The energy storage management module is connected to the waste heat recovery and cascade utilization module, the intelligent lighting control module, the solid waste resource deep utilization module, the water resource circulation purification module, the flue gas carbon capture and supply module, and the carbon dioxide electrocatalytic utilization module, and is used to use photovoltaic solar energy and energy storage equipment to provide energy for each module and manage energy distribution.

[0015] According to a high-efficiency carbon reduction and carbon fixation system based on comprehensive energy utilization of thermal power plant factories provided by the present invention, the waste heat recovery and cascade utilization module includes:

[0016] The waste heat collection unit is used to collect waste heat from the waste heat end of the power plant, and realizes heat capture and transmission by setting up a heat exchanger and insulation pipes;

[0017] A cascade utilization unit is connected to the waste heat collection unit and is used to use the collected waste heat to preheat the circulating water of the temperature control equipment of the plant factory through an intermediate medium, establish temperature requirements based on predetermined plant areas and growth stages, and use the intermediate medium to achieve temperature control of the circulating water.

[0018] According to a high-efficiency carbon reduction and carbon fixation system based on comprehensive energy utilization of thermal power plant factories provided by the present invention, the intelligent lighting control module includes:

[0019] The light monitoring and data collection unit monitors the light intensity and spectral distribution in the plant factory in real time through an intelligent light sensor network, and collects relevant data and transmits it to the cloud server;

[0020] The light control execution unit is connected to the cloud server, determines the demand based on the type and growth stage of plants in each area of ​​the current plant factory, and calculates the required light source power in combination with the light-growth rate-photosynthetic efficiency model.

[0021] According to a high-efficiency carbon reduction and fixation system based on comprehensive energy utilization of thermal power plant factories provided by the present invention, the light-growth rate-photosynthetic efficiency model is:

[0022]

[0023] Among them, P light is the ideal light source power in the area, h is Planck's constant, c is the speed of light; λ is the wavelength of light, which is determined according to the main light wavelength required by the plant species and growth stage; φ is the photon flux density required by the plant, which represents the number of photons per unit area per unit time, and is determined according to the plant species and growth stage; N photon is the area of ​​plant light received, obtained by measurement or estimation; η light It is the luminous efficiency of the light source, which is determined according to the technical parameters of the selected light source.

[0024] According to a highly efficient carbon reduction and carbon fixation system based on comprehensive energy utilization of thermal power plant factories provided by the present invention, the solid waste resource deep utilization module includes:

[0025] The solid waste nano-processing unit is connected to the solid waste terminal of the power plant and is used to nano-process fly ash and slag by ball milling or air flow milling, and to perform surface modification by chemical coating to improve their dispersibility and stability in the hydroponic nutrient solution;

[0026] The plant absorption analysis unit is connected to the solid waste nano-processing unit and is used to add nano-sized solid waste particles to the hydroponic nutrient solution, calculate the theoretical release amount of trace elements based on the release-absorption balance model, and optimize the solid waste nano-particle addition strategy.

[0027] According to a high-efficiency carbon reduction and carbon fixation system based on comprehensive energy utilization of thermal power plant factories provided by the present invention, the release-absorption balance model is:

[0028]

[0029] Among them, C release is the theoretical release amount of trace elements in solid waste nanoparticles per unit time; D is the diffusion coefficient of trace elements in solid waste nanoparticles in nutrient solution, which is calculated based on the physical properties of nanoparticles and nutrient solution according to Fick's law; A diff is the effective contact area between the nanoparticles and the nutrient solution, which is estimated based on the particle size, shape and dispersion of the nanoparticles in the nutrient solution; C s is the saturation concentration of trace elements on the surface of nanoparticles, which is calculated based on the composition and physicochemical properties of the nanoparticles; C l is the real-time concentration of trace elements in the nutrient solution; δ is the thickness of the diffusion layer, which is related to the movement and distribution of nanoparticles in the nutrient solution and is estimated by fluid mechanics and particle diffusion theory.

[0030] According to a high-efficiency carbon reduction and carbon fixation system based on comprehensive energy utilization of thermal power plant factories provided by the present invention, the water resource circulation and purification module includes:

[0031] A biofilm treatment unit is connected to the wastewater end of the power plant and is used to construct a biofilm reaction pool, inoculate a microbial community, and utilize microbial metabolism to degrade organic pollutants in the wastewater by controlling dissolved oxygen concentration, temperature and pH value;

[0032] A reverse osmosis membrane treatment unit is connected to the biofilm treatment unit and adopts a multi-stage reverse osmosis membrane assembly to calculate a purification efficiency index based on a purification efficiency-treatment cost model; based on the difference between the actual purification efficiency index and a preset threshold, the pump head and flow rate are adjusted accordingly or the reverse osmosis membrane is cleaned to improve the purification efficiency so that the purified water reaches the standard defined by the preset threshold of the plant factory.

[0033] According to a high-efficiency carbon reduction and carbon fixation system based on comprehensive energy utilization of thermal power plant factories provided by the present invention, the purification efficiency-processing cost model is:

[0034]

[0035] Among them, E pur It is a purification efficiency index used to reflect the performance of water purification; ρ is the density of water, g is the acceleration of gravity; H is the head of the high-pressure pump in the reverse osmosis membrane treatment unit, which is determined according to the system pressure requirements; Q is the water flow rate; η pump is the efficiency of the pump, which can be determined according to the type and technical parameters of the pump; Δp is the pressure difference on both sides of the reverse osmosis membrane, which is determined according to the operating pressure requirements of the membrane; C in is the pollutant concentration of wastewater entering the purification process, C out is the pollutant concentration of the purified water; V sys is the volume of the entire biofilm reaction tank, which is calculated based on the design dimensions.

[0036] According to a high-efficiency carbon reduction and carbon fixation system based on comprehensive energy utilization of a thermal power plant factory provided by the present invention, the flue gas carbon capture and supply module comprises:

[0037] A flue gas carbon capture unit, which is connected to the flue gas end of the power plant, uses polymer membrane separation technology to capture and purify carbon dioxide in the flue gas of the power plant through aluminosilicate molecular sieve membranes, using the regular pore structure of the molecular sieves, and automated valves and pressure control equipment;

[0038] A precise supply unit is connected to the flue gas carbon capture unit, and based on the carbon supply-photosynthetic rate model, determines the carbon demand flow of each area of ​​each plant factory, and supplies each area of ​​the plant factory based on the carbon demand flow; at the same time, based on the research on the sensitivity of agriculture to changes in the crop growth environment, intelligently coordinates and precisely controls environmental factors such as environmental temperature, humidity, light intensity, culture solution composition and pH value;

[0039] The carbon supply-photosynthetic rate model is:

[0040]

[0041] in, is the carbon dioxide flow supplied to each area of ​​the plant factory, that is, the carbon demand flow; k B is the Boltzmann constant, T is the temperature in the plant factory; A is the total leaf area of ​​the plants in the area, which is determined by estimation; P is the carbon dioxide partial pressure expected to be maintained in the plant factory, which is determined according to the photosynthetic needs of the plants; totalis the total air pressure in the plant factory, which is generally taken as standard atmospheric pressure; d is the gas diffusion distance, which is determined according to the layout of the plant factory and the design of the gas supply pipeline; is the mass of a carbon dioxide molecule.

[0042] According to the present invention, a high-efficiency carbon reduction and fixation system based on comprehensive energy utilization of thermal power plant factories is provided, wherein the carbon dioxide electrocatalytic utilization module comprises: reacting purified carbon dioxide with water, using high-pressure strong electrolysis, and utilizing working condition spectroscopy to achieve carbon species coupling and directional conversion to produce alcohol-like carbon-based compounds.

[0043] Compared with the prior art, the beneficial effects of this application are:

[0044] The waste heat recovery and cascade utilization module in this application can efficiently collect waste heat from the waste heat end of the power plant through the waste heat collection unit and the cascade utilization unit, and accurately use it in the temperature control system of the plant factory;

[0045] At present, the treatment method of solid waste (such as fly ash and slag) from power plants is relatively simple, and is mostly used in fields such as low-value-added building materials. The solid waste resource deep utilization module of the present application converts solid waste into nano-scale particles through a solid waste nano-processing unit, and performs surface modification so that it can be added to the hydroponic nutrient solution of the plant factory as a source of trace element supplementation. This method not only increases the added value of solid waste, but also realizes the recycling of solid waste resources in the agricultural field, reducing the occupation and potential pollution of the environment by solid waste.

[0046] The water resource circulation purification module of the present application adopts a combination of a biofilm treatment unit and a reverse osmosis membrane treatment unit, and accurately controls the operating parameters according to the purification efficiency-treatment cost model to deeply purify and recycle the power plant treated water; this enables water resources to be efficiently circulated within the plant factory, greatly improving the utilization rate of water resources, reducing dependence on external water resources, reducing production costs, and also alleviating the pressure of power plant wastewater discharge on the environment;

[0047] The flue gas carbon capture and supply module of the present application captures carbon dioxide in flue gas through polymer membrane separation technology, and accurately supplies different areas of the plant factory according to the carbon supply-photosynthesis rate model, converting carbon dioxide into carbon resources required for plant growth; at the same time, based on the research on the sensitivity of agriculture to changes in the crop growth environment, intelligent coordination and accurate control of environmental factors such as ambient temperature, humidity, light intensity, culture solution composition and pH value; this not only reduces the emission of carbon dioxide from power plants, but also realizes the resource utilization of carbon dioxide, helps to build a low-carbon or even negative-carbon energy-agriculture ecosystem, and has positive significance for alleviating global climate change;

[0048] The intelligent light control module of the present application uses the light-growth rate-photosynthetic efficiency model to accurately calculate the required light source power according to the plant type and growth stage, and realizes precise control of light intensity and spectrum; at the same time, combined with the coordinated control of environmental factors such as temperature, humidity, and carbon dioxide concentration by other modules, it provides a more suitable growth environment for plants, which helps to improve the growth rate, quality and yield of plants;

[0049] This application calculates the release of trace elements according to the release-absorption balance model through the solid waste resource deep utilization module, optimizes the solid waste nanoparticle addition strategy, and can more accurately provide plants with the required trace elements, ensure the nutritional balance of plants throughout the growth cycle, further improve the health status and stress resistance of plants, thereby improving the overall production efficiency of the plant factory.

[0050] The present application provides a catalytic reaction technology, using carbon dioxide and water, two relatively common substances, as raw materials, especially carbon dioxide from power plant flue gas, and water from a water resource circulation purification module; this realizes the effective utilization of waste resources and improves the resource utilization rate of the entire system; the generated alcohol-like carbon-based compounds are valuable chemicals. These compounds can be used as chemical raw materials or energy materials, etc., to provide raw materials for industrial production or other fields, bringing certain economic benefits. At the same time, the use of high-pressure strong electrolysis combined with working condition spectroscopy to achieve carbon species coupling and directional conversion is an advanced catalytic technology that can accurately control the conversion process of carbon dioxide, so that the reaction is carried out in the direction of generating alcohol-like carbon-based compounds. Compared with traditional carbon dioxide utilization technology, this application has higher selectivity and conversion rate.

[0051] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description and the accompanying drawings.

[0052] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0054] Figure 1 It is a structural schematic diagram of a high-efficiency carbon reduction and carbon fixation system based on comprehensive energy utilization of a thermal power plant factory provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0055] The preferred embodiments of the present invention are described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention.

[0056] Embodiment 1:

[0057] The embodiment of the present invention provides a highly efficient carbon reduction and carbon fixation system based on comprehensive energy utilization of thermal power plant factories. Figure 1 ,include:

[0058] The waste heat recovery and cascade utilization module is connected to the waste heat end of the power plant and the plant factory to collect the waste heat of the power plant and utilize it in a cascade manner to provide heat for the temperature control system of the plant factory;

[0059] Intelligent lighting control module, which is set in the plant factory to monitor plant needs and adjust the light source power accordingly;

[0060] The solid waste resource deep utilization module is connected to the solid waste terminal of the power plant and the plant factory to pre-treat the solid waste of the power plant and adjust the application amount of solid waste to balance the trace element needs of the plants;

[0061] A water resource circulation and purification module, which is connected to the wastewater end of the power plant and the plant factory, is used to circulate and purify the treated water of the power plant, determine the purification efficiency index, and adjust the water supply to the plant factory based on the purification efficiency index;

[0062] A flue gas carbon capture supply module, which is connected to the flue gas end of the power plant and the plant factory, is used to capture carbon dioxide in the flue gas and adjust the flow of carbon dioxide delivered to different areas of the plant factory;

[0063] The carbon dioxide electrocatalytic utilization module reacts the purified carbon dioxide with water, uses high-pressure strong electrolysis, and uses working condition spectroscopy to achieve carbon species coupling and directional conversion to produce alcohol-like carbon-based compounds;

[0064] The energy storage management module is connected to the waste heat recovery and cascade utilization module, the intelligent lighting control module, the solid waste resource deep utilization module, the water resource circulation purification module, the flue gas carbon capture and supply module, and the carbon dioxide electrocatalytic utilization module, and is used to use photovoltaic solar energy and energy storage equipment to provide energy for each module and manage energy distribution.

[0065] The principles and beneficial effects of this embodiment are: collecting energy from the waste heat generated by the thermal power plant, and distributing this waste heat to different systems in the plant factory according to different temperature requirements, such as the temperature control system; this not only effectively utilizes the energy that might otherwise be wasted, but also reduces additional heating costs; monitors the growth status of plants through sensors installed inside the plant factory, automatically adjusts the intensity and spectrum of light sources such as LED lights, ensures that plants obtain the most suitable lighting conditions, and saves energy at the same time; treats the solid waste generated by the thermal power plant and uses it as fertilizer or other useful substances in the plant growth process to achieve waste recycling; recycles the wastewater discharged by the thermal power plant and After being treated to the standard of being reusable, it is used for irrigation of plant factories, reducing the demand for fresh water. Advanced carbon capture technology is used to extract carbon dioxide from the flue gas emitted by thermal power plants, and it is transported to plant factories as one of the raw materials required for plant photosynthesis, which not only reduces greenhouse gas emissions but also promotes plant growth. The remaining purified carbon dioxide in the flue gas is passed through the high-pressure strong carbon dioxide electrolysis system alcohol compound synthesis technology, and the carbon dioxide is converted into alcohol compounds through photovoltaic electricity, realizing the electrocatalytic recycling of carbon dioxide to organic matter. Photovoltaic solar power generation and energy storage devices are combined to provide a stable power supply for the entire system, optimize energy allocation, and improve energy efficiency.

[0066] In order to further optimize the above embodiment, the waste heat recovery and cascade utilization module includes:

[0067] The waste heat collection unit is used to collect waste heat from the waste heat end of the power plant, and realizes heat capture and transmission by setting up a heat exchanger and insulation pipes;

[0068] The cascade utilization unit is connected to the waste heat collection unit and is used to use the collected waste heat to preheat the circulating water of the temperature control equipment of the plant factory through an intermediate medium, establish temperature requirements based on predetermined plant areas and growth stages, and use the intermediate medium to achieve temperature control of the circulating water.

[0069] It should be noted that for the waste heat collection unit, the appropriate type of heat exchanger, such as a shell and tube heat exchanger or a plate heat exchanger, is selected according to the parameters of the waste heat of the power plant, such as the temperature, flow rate and pressure. For high-temperature and high-pressure waste heat, a shell and tube heat exchanger may be more suitable, which has the characteristics of high temperature resistance, high pressure resistance, strong structure and strong adaptability. When designing the heat exchanger, the heat exchange area is accurately calculated, and the waste heat capture efficiency is improved by optimizing the parameters such as the diameter, length, number of tube passes and number of shell passes of the heat exchange tube. For example, the use of enhanced heat transfer technology, such as adding fins to the inner surface of the heat exchange tube or using structures such as threaded tubes, increases the heat transfer area and heat transfer coefficient, ensuring that the waste heat can be efficiently transferred from the waste heat end of the power plant to the intermediate medium.

[0070] The selection of insulated pipes is also crucial. Use multi-layer composite insulation materials, such as the inner layer of high-temperature resistant aluminum silicate fiber felt, the middle layer of polyurethane foam insulation layer, and the outer layer of waterproof and anti-corrosion aluminum foil or stainless steel sheet. By reasonably designing the thickness of the insulation layer, according to factors such as the pipe length, ambient temperature and waste heat temperature, calculate the heat loss during the transmission process, ensure that the thermal conductivity of the insulated pipe is as low as possible, reduce the loss of heat during the transmission process, and maximize the transmission of waste heat to the cascade utilization unit.

[0071] At the same time, high-precision temperature sensors, pressure sensors and flow sensors are installed to monitor the temperature, pressure and flow changes of the waste heat in real time. These sensors are connected to the automatic control system. When the waste heat parameters fluctuate, the automatic control system can adjust the operating parameters of the heat exchanger in time, such as adjusting the flow rate and flow velocity of the intermediate medium or changing the heat exchange area (controlling the on and off of some heat exchange tubes through valves) to ensure the stability and efficiency of the waste heat collection process. For example, when the waste heat temperature rises, the flow rate of the intermediate medium is automatically increased to speed up the heat exchange speed, prevent the heat exchanger from being damaged due to overheating, and improve the waste heat collection efficiency.

[0072] For cascade utilization units, the selection of intermediate media needs to comprehensively consider its thermophysical properties, such as specific heat capacity, thermal conductivity, boiling point and freezing point. Water-ethylene glycol solution is a commonly used intermediate medium, which has good heat transfer performance and a low freezing point, and is suitable for use in different seasons and temperature conditions. In terms of circulation system design, an efficient circulation pump is used, and the appropriate pump type and head are selected according to the system resistance and required flow rate to ensure that the intermediate medium can circulate stably between the waste heat collection unit and the plant factory temperature control equipment. At the same time, optimize the pipeline layout, reduce pipeline resistance, and avoid problems such as excessive pressure loss or local overheating of the intermediate medium during the circulation process.

[0073] In order to improve the heat exchange efficiency between the intermediate medium and the circulating water, the heat exchanger design of the preheating section and the temperature control section is optimized. An efficient plate heat exchanger is used, which has the advantages of high heat transfer efficiency, compact structure, and small footprint. By increasing the number of plates in the heat exchanger, optimizing the corrugated shape and spacing of the plates, the heat transfer coefficient between the intermediate medium and the circulating water is improved, and fast and uniform heat exchange is achieved, so that the circulating water can quickly reach the required preheating temperature, and precise temperature control can be achieved in different plant areas and growth stages.

[0074] It should also be noted that a detailed temperature control strategy is established based on the precise temperature requirements of predetermined plant areas (such as seedling areas, growth areas, flowering and fruiting areas, etc.) and different plant varieties at various growth stages (such as seed germination, seedlings, vegetative growth, reproductive growth, etc.). For example, in the seedling area, a higher temperature (such as 25°C-30°C) is required during the seed germination period. At this time, the circulating water temperature is accurately maintained within this range by controlling the flow rate of the intermediate medium and the heat exchange power of the heat exchanger to promote rapid seed germination. In the growth area, plants in the vegetative growth period have a strong adaptability to temperature, but they still need to be kept within an appropriate range (such as 20°C-25°C). The temperature changes are monitored in real time through the partitioned temperature sensor, and the supply of the intermediate medium is automatically adjusted to achieve dynamic temperature control.

[0075] Using zoning control technology, an independent temperature control system is set up for each plant area, including temperature sensors, electric regulating valves, controllers and other equipment. The temperature sensor monitors the actual temperature of each area in real time and transmits the signal to the controller. The controller accurately controls the flow of the intermediate medium entering the heat exchanger in the area through the electric regulating valve according to the preset temperature requirements, so as to achieve independent temperature control of each area. This can avoid the temperature interference between different areas, ensure that the plants in each area can grow in the most suitable temperature environment, improve the growth quality and yield of the plants, and further improve the efficiency and accuracy of waste heat utilization.

[0076] In order to further optimize the above embodiment, the intelligent lighting control module includes:

[0077] The light monitoring and data collection unit monitors the light intensity and spectral distribution in the plant factory in real time through an intelligent light sensor network, and collects relevant data and transmits it to the cloud server;

[0078] The lighting control execution unit is connected to the cloud server, determines the demand based on the type and growth stage of plants in each area of ​​the current plant factory, and calculates the required light source power based on the light-growth rate-photosynthetic efficiency model.

[0079] The light-growth rate-photosynthetic efficiency model is:

[0080]

[0081] Among them, P light is the ideal light source power in the area, h is Planck's constant, c is the speed of light; λ is the wavelength of light, which is determined according to the main light wavelength required by the plant species and growth stage; φ is the photon flux density required by the plant, which represents the number of photons per unit area per unit time, and is determined according to the plant species and growth stage; N photon is the area of ​​plant light received, obtained by measurement or estimation; η lightIt is the luminous efficiency of the light source, which is determined according to the technical parameters of the selected light source.

[0082] It should be noted that, according to the layout of the plant factory and the distribution of planting areas, the intelligent light sensor network is arranged in a uniform distribution combined with the principle of strengthening key areas; a regular grid layout is adopted in large-scale planting areas to ensure comprehensive monitoring of the overall light environment; the sensor density is appropriately increased in key plant growth areas (such as seedling areas, rare plant planting areas, etc.) to improve the accuracy of local light monitoring; in terms of sensor selection, light sensors with high sensitivity, high resolution and wide spectral response range are selected, which can accurately measure the light intensity in different wavelength ranges (including visible light and part of near-infrared light), and have a fast response time to capture changes in the light environment in real time; for example, the resolution of the selected light sensor in the visible light band of 400nm-700nm can reach 1μmol / m 2 ·s, it can also provide accurate measurement data in the 700nm-1000nm near-infrared light band, with a response time of less than 1s, ensuring that the collected data can accurately reflect the actual light conditions received by the plants;

[0083] To ensure the stability and reliability of data transmission, the sensor network adopts a combination of wired and wireless communication methods; low-power, high-reliability wireless communication technology (such as ZigBee or Bluetooth) is used between the sensor and the local data acquisition node to reduce wiring costs and complexity; the local data acquisition node is connected to the cloud server through a high-speed wired network (such as Ethernet) to ensure that a large amount of light data can be transmitted to the cloud in a timely and accurate manner; at the same time, each sensor is equipped with an independent power management module, powered by a rechargeable battery, and combined with solar panels for energy supplementation, to achieve long-term stable operation of the sensor and avoid data collection interruptions due to power problems;

[0084] After receiving the light monitoring data, the cloud server first analyzes and processes the data in real time; combined with the type and growth stage information of plants in each area of ​​the plant factory, the corresponding light demand parameters are retrieved from the pre-established plant light demand database; the database contains detailed requirements for light intensity, spectral distribution and light duration for various common plants (such as vegetables, flowers, fruits, etc.) at different growth stages (from seed germination to mature harvest); for example, for lettuce in the seedling stage, a higher proportion of blue light (400nm-500nm band accounts for 40%-50% of the total light intensity) and a relatively low light intensity (100μmol / m 2 ·s-150μmol / m 2 ·s); during the vigorous growth period, a more balanced ratio of blue light and red light (600nm-700nm) is required (30%-40% each), and the light intensity is increased to 200μmol / m2 ·s-300μmol / m 2 ·s; The cloud server determines the light demand deviation of plants in each area based on these demand parameters and real-time monitoring data, providing an accurate basis for light regulation;

[0085] Use machine learning algorithms to conduct correlation analysis on light data and plant growth data, and establish a prediction model for light and plant growth status; use long-term accumulated historical data to train the model to predict indicators such as plant growth rate, biomass accumulation and quality changes under different light conditions; for example, use a neural network algorithm to train the model with light intensity, spectral distribution, light time, plant variety, growth stage, etc. as input parameters, and plant growth rate, leaf area, chlorophyll content, etc. as output parameters; after training with a large amount of data, the model can predict plant growth trends based on real-time light data, detect possible light problems in advance, and provide optimization suggestions for light regulation;

[0086] The wavelength of light is determined according to the main wavelength of light required by the plant at the current growth stage. For example, in the stage with higher demand for blue light, λ is 450nm;

[0087] The lighting control execution unit controls the working state of artificial light sources (such as LED lights) through the intelligent power distribution system according to the light source power instructions calculated by the cloud server; an LED light module with adjustable brightness and spectrum is used to adjust the light brightness by changing the driving current, and a combination of LED chips of different colors is used to realize dynamic control of the spectrum; for example, when it is necessary to increase the proportion of blue light, the driving current of the blue light LED chip is increased, and the current of other color chips is adjusted accordingly to make the spectrum distribution meet the needs of plants; the intelligent power distribution system can realize independent control of each area and each group of lamps to ensure the accuracy and flexibility of lighting control; at the same time, a lighting feedback adjustment mechanism is set up to collect lighting data again and compare the actual lighting conditions after control with the target value. If there is a deviation, it will be fine-tuned in time to further improve the accuracy of lighting control and provide the most suitable lighting environment for plant growth.

[0088] In order to further optimize the above embodiment, the solid waste resource deep utilization module includes:

[0089] The solid waste nano-processing unit is connected to the solid waste terminal of the power plant and is used to nano-process fly ash and slag by ball milling or air flow milling, and to perform surface modification by chemical coating to improve their dispersibility and stability in the hydroponic nutrient solution;

[0090] The plant absorption analysis unit is connected to the solid waste nano-processing unit and is used to add nano-sized solid waste particles to the hydroponic nutrient solution, calculate the theoretical release amount of trace elements based on the release-absorption balance model, and optimize the solid waste nano-particle addition strategy.

[0091] The release-absorption equilibrium model is:

[0092]

[0093] Among them, C release is the theoretical release amount of trace elements in solid waste nanoparticles per unit time; D is the diffusion coefficient of trace elements in solid waste nanoparticles in nutrient solution, which is calculated based on the physical properties of nanoparticles and nutrient solution according to Fick's law; A diff is the effective contact area between the nanoparticles and the nutrient solution, which is estimated based on the particle size, shape and dispersion of the nanoparticles in the nutrient solution; C s is the saturation concentration of trace elements on the surface of nanoparticles, which is calculated based on the composition and physicochemical properties of the nanoparticles; C l is the real-time concentration of trace elements in the nutrient solution; δ is the thickness of the diffusion layer, which is related to the movement and distribution of nanoparticles in the nutrient solution and is estimated by fluid mechanics and particle diffusion theory.

[0094] It should be noted that grinding balls and ball mill tanks of suitable materials and sizes should be selected. Use high-hardness, wear-resistant ceramic or alloy steel grinding balls, and determine the grinding ball diameter according to the hardness of fly ash and slag and the required nano-level degree. For example, grinding balls with larger diameters (10mm-20mm) are used in the initial rough grinding stage, and grinding balls with smaller diameters (1mm-5mm) are used in the later fine grinding stage to improve grinding efficiency and nano-level effect. At the same time, optimize the speed and ball-to-material ratio of the ball mill. The optimal speed range is determined by experiments, generally between 200rpm-600rpm, which can not only ensure grinding energy, but also avoid agglomeration caused by excessive grinding. The ball-to-material ratio is controlled between 5:1-20:1, and the number of grinding balls is accurately adjusted according to the amount of solid waste feed to ensure that the material is fully ground during the ball milling process. During the ball milling process, inert gas protection (such as nitrogen) is introduced to prevent the oxidation of active components in fly ash and slag, affecting their subsequent effect as a source of trace element supplements.

[0095] In the air flow pulverization method, the air flow velocity and feed rate are precisely controlled. According to the physical properties of the solid waste and the required nanoparticle size, the air flow velocity is adjusted between 200m / s-500m / s and the feed rate is between 1kg / h-10kg / h. The supersonic air flow nozzle design is adopted to achieve strong collision and crushing of solid waste particles in high-speed airflow. At the same time, a grading device is set in the pulverizing chamber to separate particles with nanometer particle size in real time, avoid excessive pulverization and agglomeration, and improve the particle size uniformity of nano-products. For example, the speed of the grading wheel can be adjusted according to the target particle size. When the target particle size is 50nm-100nm, the speed of the grading wheel is controlled between 3000rpm-6000rpm.

[0096] When the chemical coating method is used for surface modification, a suitable surface modifier is selected. To improve the dispersibility and stability in the hydroponic nutrient solution, silane coupling agents, titanate coupling agents or fatty acid salts can be used. Taking silane coupling agents as an example, according to the surface chemical properties of fly ash and slag, silane coupling agents containing specific functional groups (such as amino, epoxy, thiol, etc.) are selected to ensure that they have good chemical bonding with the surface of solid waste particles. The amount of coupling agent is determined according to the specific surface area and surface active group content of the solid waste nanoparticles, which is generally 1%-5% of the mass of the solid waste. The surface modification treatment is carried out by solution immersion or spraying to ensure that the coupling agent is evenly coated on the surface of the nanoparticles. In the solution impregnation method, the impregnation time is controlled between 30min-120min, the impregnation temperature is between 30℃-60℃, and then the solvent is removed by drying so that the coupling agent is firmly bound to the surface of the nanoparticles to form a stable coating layer, which effectively improves the dispersibility and stability of the nanoparticles in the nutrient solution and prevents agglomeration.

[0097] In the model, in addition to experimental determination, molecular dynamics simulation methods can also be used to assist in the calculation of the diffusion coefficient. A molecular model of the nanoparticle-nutrient solution system is established to simulate the diffusion behavior of nanoparticles in the nutrient solution. By statistically analyzing the displacement of nanoparticles within a certain period of time, the diffusion coefficient is calculated according to the Einstein-Smoluchovsky equation. This method can provide an in-depth understanding of the mechanism of the diffusion process at the microscopic level, provide theoretical support and supplement for experimental determination, and predict the changing trend of the diffusion coefficient under different conditions (such as temperature and concentration changes), which helps to more accurately control the release of trace elements in solid waste nanoparticles.

[0098] In order to further optimize the above embodiment, the water resource circulation purification module includes:

[0099] The biofilm treatment unit is connected to the wastewater end of the power plant and is used to construct a biofilm reaction pool, inoculate microbial communities, and utilize microbial metabolism to degrade organic pollutants in the wastewater by controlling dissolved oxygen concentration, temperature and pH value;

[0100] The reverse osmosis membrane treatment unit is connected to the biofilm treatment unit and adopts a multi-stage reverse osmosis membrane assembly. The purification efficiency index is calculated based on the purification efficiency-treatment cost model. Based on the difference between the actual purification efficiency index and the preset threshold, the pump head and flow rate are adjusted accordingly or the reverse osmosis membrane is cleaned to improve the purification efficiency so that the purified water meets the standard defined by the preset threshold of the plant factory.

[0101] The purification efficiency-treatment cost model is:

[0102]

[0103] Among them, E pur It is a purification efficiency index used to reflect the performance of water purification; ρ is the density of water, g is the acceleration of gravity; H is the head of the high-pressure pump in the reverse osmosis membrane treatment unit, which is determined according to the system pressure requirements; Q is the water flow rate; η pump is the efficiency of the pump, which can be determined according to the type and technical parameters of the pump; Δp is the pressure difference on both sides of the reverse osmosis membrane, which is determined according to the operating pressure requirements of the membrane; C in is the pollutant concentration of wastewater entering the purification process, C out is the pollutant concentration of the purified water; V sys is the volume of the entire biofilm reaction tank, which is calculated based on the design dimensions.

[0104] It should be noted that the structural design of the biofilm reactor is crucial to the attachment of microorganisms and the effect of wastewater treatment. A possible implementation method is to adopt a modular reactor structure, which is convenient for flexible combination and expansion according to the actual amount of water treated and the water quality. Inside the reactor, a reasonable water flow channel and aeration system are set to ensure that the wastewater can flow evenly through the biofilm surface while providing sufficient oxygen. For example, a baffled or plug-flow water flow channel design is adopted to form a stable water flow state in the reactor, prolong the contact time between the wastewater and the biofilm, and improve the degradation efficiency of organic pollutants. The aeration system adopts microporous aeration discs or tubular aerators, which are evenly distributed at the bottom of the reactor. By adjusting the aeration intensity, the dissolved oxygen concentration is controlled between 2mg / L-6mg / L to meet the aerobic requirements of different microbial communities.

[0105] The selection and cultivation of microbial communities are the key to biofilm treatment units. According to the water quality characteristics of power plant wastewater (such as organic matter, ammonia nitrogen and other pollutants), efficient microbial flora are screened and domesticated. By collecting microbial samples from the power plant wastewater treatment site or other similar environments, enrichment culture and domestication are carried out in the laboratory to adapt them to the water quality and environmental conditions of power plant wastewater. At the same time, the structure and activity of the microbial community are monitored regularly, and molecular biology techniques (such as polymerase chain reaction-denaturing gradient gel electrophoresis, PCR-DGGE) are used to analyze the diversity changes of the microbial community. According to the monitoring results, microbial agents are supplemented or adjusted in time to maintain the stability and efficient degradation ability of the microbial community. For example, when it is found that the number of certain key degradation bacteria is reduced or the activity is reduced, the corresponding agents are added in time to supplement them to ensure the continuous and efficient degradation of organic pollutants in the wastewater by the biofilm.

[0106] In addition to adjusting the dissolved oxygen concentration through the aeration system, the control can also be combined with an online dissolved oxygen monitor and an automatic control system to achieve precise control. When the dissolved oxygen concentration is lower than the set lower limit (such as 2 mg / L), the aeration intensity is automatically increased; when the dissolved oxygen concentration is higher than the set upper limit (such as 6 mg / L), the aeration intensity is appropriately reduced to avoid excessive aeration leading to energy waste and abnormal microbial metabolism. In terms of temperature control, a constant temperature control system is used. For the medium-temperature microbial treatment process, the temperature of the reaction tank is controlled between 20℃-35℃. By setting up insulation layers, heating or cooling coils and other facilities around the reaction tank, the temperature of the reaction tank is automatically adjusted according to seasonal and ambient temperature changes to ensure that the microorganisms are in the optimal metabolic temperature range. The pH value is adjusted through an online pH monitor and an acid-base addition system. When the pH value of the wastewater deviates from the suitable range of microorganisms (such as 6.5-8.5), an acid-base regulator (such as sulfuric acid or sodium hydroxide) is automatically added for adjustment to maintain a stable acid-base environment in the reaction tank and promote the normal growth and metabolism of microorganisms.

[0107] When the actual purification efficiency index is lower than the threshold, first analyze the cause. It may be membrane pollution leading to a decrease in water flux, reduced pump efficiency or unreasonable operating parameters. If it is a membrane pollution problem, clean the reverse osmosis membrane in time. A combination of chemical cleaning (such as acid washing, alkali washing, oxidant cleaning, etc.) and physical cleaning (such as flushing, backwashing, etc.) can be used to restore the performance of the membrane. At the same time, adjust the pump head, flow rate or optimize the operating parameters (such as pressure difference, concentrated water reflux ratio, etc.) according to actual conditions to improve the purification efficiency and ensure that the purified water meets the standards defined by the preset threshold of the plant factory, so as to achieve efficient recycling and purification of water resources. Regularly evaluate and optimize the system's performance, and revise and improve the parameters in the model based on long-term operating data and actual conditions to improve the stability and reliability of the system's operation.

[0108] In order to further optimize the above embodiment, the flue gas carbon capture supply module includes:

[0109] The flue gas carbon capture unit is connected to the flue gas end of the power plant and uses polymer membrane separation technology to capture and purify carbon dioxide in the flue gas of the power plant through aluminosilicate molecular sieve membranes, using the regular pore structure of the molecular sieves, and automated valves and pressure control equipment;

[0110] The precise supply unit is connected to the flue gas carbon capture unit. Based on the carbon supply-photosynthetic rate model, it determines the carbon demand flow of each area of ​​each plant factory and supplies each area of ​​the plant factory based on the carbon demand flow. At the same time, based on the research on the sensitivity of agriculture to changes in the crop growth environment, it intelligently coordinates and precisely controls environmental factors such as environmental temperature, humidity, light intensity, culture solution composition and pH value.

[0111] The carbon supply-photosynthetic rate model is:

[0112]

[0113] in, is the carbon dioxide flow supplied to each area of ​​the plant factory, that is, the carbon demand flow; k B is the Boltzmann constant, T is the temperature in the plant factory; A is the total leaf area of ​​the plants in the area, which is determined by estimation; P is the carbon dioxide partial pressure expected to be maintained in the plant factory, which is determined according to the photosynthetic needs of the plants; total is the total air pressure in the plant factory, which is generally taken as standard atmospheric pressure; d is the gas diffusion distance, which is determined according to the layout of the plant factory and the design of the gas supply pipeline; is the mass of a carbon dioxide molecule.

[0114] It should be noted that the flue gas enters the membrane system for separation, and the partial pressure of the pressurized gas and the pressure difference on the permeation side of the separation membrane are used as the separation power of the separation membrane assembly. The separation membrane has different permeation rates for different gases, and the CO2 in the flue gas passes through the membrane more preferentially than other components of the air, so that the CO2 concentration of the permeation side gas after passing through the membrane assembly is enriched and enters the plant factory. When the CO2 concentration of the plant factory exceeds the target concentration, the supply of high-concentration carbon dioxide is automatically cut off. Considering that the excess flue gas needs to be returned to the chimney, the permeation side gas pressure of this project is designed to be 0.2MPaG, and the high-concentration carbon dioxide can be directly returned to the chimney entrance along the laid pipeline. The flue gas pressure loss on the residual side is small and can be directly returned to the chimney entrance along the laid pipeline.

[0115] At present, gas separation technologies include cryogenic distillation, pressure swing adsorption and membrane separation. Cryogenic distillation has high energy consumption and complicated process; pressure swing adsorption has low recovery rate and high desorption energy consumption. As a new material with selective separation function, membrane has important applications in energy, water resources, environment, traditional industries and other fields. Compared with traditional gas separation technology, gas membrane separation technology has the advantages of continuous operation process, high separation efficiency, low energy consumption and environmental friendliness. Using membrane separation technology to replace traditional distillation technology can save more than 90% of separation energy consumption. At present, different types of membrane materials, such as polymer membranes, carbon molecular sieve membranes (CMSM), palladium membranes, metal organic framework membranes (MOFs), and molecular sieve membranes, have been widely used in gas separation research.

[0116] Molecular sieve is a crystal with a regular pore structure. Its main material is aluminosilicate, and its pore size is usually less than 1nm. Molecular sieve membrane is a continuous thin film formed by the intergrowth of molecular sieve crystals. The regular pore structure of molecular sieve is used to separate different gas components. Figure 1 ) Molecular sieve membranes not only have outstanding advantages such as adjustable pore size and surface chemical properties, excellent thermochemical stability, but also can simultaneously improve permeability and selectivity, breaking the trade-off limitations of polymer membranes, and are ideal membrane materials for gas separation in harsh environments;

[0117] The layout of the gas supply system adopts a combination of zoned gas supply and uniform gas distribution. According to the differences in plant species, planting density and growth stages in different areas of the plant factory, multiple gas supply areas are divided, and each area is equipped with independent gas supply pipelines and flow control devices. In the design of the gas supply pipeline, a ring or branch-shaped pipe network structure is adopted to ensure that the carbon dioxide gas can be evenly distributed around each plant. A gas diffuser, such as a microporous aeration head or a mist nozzle, is installed at the end of the pipeline to release the carbon dioxide gas in the form of tiny bubbles or mist, increase the contact area between the gas and the plant, and improve the absorption efficiency of carbon dioxide. For example, the aperture of the microporous aeration head can be controlled between tens of microns and hundreds of microns, and the bubble diameter produced is small and the rising speed is slow, which is conducive to the full diffusion and absorption of carbon dioxide around the plant.

[0118] Establish a dynamic control strategy to adjust the carbon dioxide supply in time according to the real-time changes in the plant growth process and the fluctuations of environmental factors. In addition to the basic supply calculated based on the carbon supply-photosynthetic rate model, the actual growth state of the plant (such as growth rate, leaf color, biomass accumulation, etc.) and environmental factors (such as light intensity, temperature, humidity, etc.) on photosynthesis are also considered. By online monitoring of plant growth indicators (such as using plant physiological monitors to measure photosynthetic rate, transpiration rate, etc.) and environmental parameters, when changes in plant photosynthetic rate or environmental conditions are found, the carbon demand flow calculation parameters are corrected in real time to adjust the carbon dioxide supply. For example, when the light intensity suddenly increases, plant photosynthesis increases, and the carbon dioxide supply may need to be increased; when the temperature is too high or the humidity is too high, the plant stomata are closed and photosynthesis is inhibited. The carbon dioxide supply can be appropriately reduced to avoid gas accumulation and waste, and to achieve precise dynamic control of carbon dioxide supply, thereby improving the production efficiency and resource utilization efficiency of plant factories.

[0119] In order to further optimize the above embodiment, the carbon dioxide electrocatalytic utilization module reacts the purified carbon dioxide with water, uses high-pressure strong electrolysis, and uses working condition spectroscopy to achieve carbon species coupling and directional conversion to produce alcohol-like carbon-based compounds.

[0120] It should be noted that carbon dioxide catalysis uses highly selective and high-conversion catalytic materials suitable for pressurized conditions to achieve efficient CC coupling and directional conversion of alcohol products through the action of the catalytic stack. This process requires highly reliable and stable internal pressure.

[0121] To maintain the internal pressurization and temperature control flow device for catalytic reaction, it is necessary to build a new porous electrode structure and internal and external pressure control and stabilization flow path to ensure the continuous stability of the three-phase interface, that is, a new high-pressure three-phase interface high-efficiency CO2 electrolysis device. The high-pressure device uses a gas-controlled back pressure valve to control the internal pressure of the reactor, and uses a fine pressure difference to adjust the pressure on both sides of the gas-liquid interface to maintain the interface stable. At the same time, the input current of the controllable stack of carbon dioxide conversion is stabilized by intelligent control and energy storage assistance.

[0122] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. An efficient carbon reduction and carbon fixation system based on comprehensive energy utilization of thermal power plant factories, characterized in that: include: The waste heat recovery and cascade utilization module is connected to the waste heat end of the power plant and the plant factory to collect the waste heat of the power plant and utilize it in a cascade manner to provide heat for the temperature control system of the plant factory; Intelligent lighting control module, which is set in the plant factory to monitor plant needs and adjust the light source power accordingly; The solid waste resource deep utilization module is connected to the solid waste terminal of the power plant and the plant factory to pre-treat the solid waste of the power plant and adjust the application amount of solid waste to balance the trace element needs of the plants; A water resource circulation and purification module, which is connected to the wastewater end of the power plant and the plant factory, is used to circulate and purify the treated water of the power plant, determine the purification efficiency index, and adjust the water supply to the plant factory based on the purification efficiency index; A flue gas carbon capture supply module, which is connected to the flue gas end of the power plant and the plant factory, is used to capture carbon dioxide in the flue gas and adjust the flow of carbon dioxide delivered to different areas of the plant factory; The carbon dioxide electrocatalytic utilization module reacts the purified carbon dioxide with water, uses high-pressure strong electrolysis, and uses working condition spectroscopy to achieve carbon species coupling and directional conversion to produce alcohol-like carbon-based compounds; The energy storage management module is connected to the waste heat recovery and cascade utilization module, the intelligent lighting control module, the solid waste resource deep utilization module, the water resource circulation purification module, the flue gas carbon capture and supply module, and the carbon dioxide electrocatalytic utilization module, and is used to use photovoltaic solar energy and energy storage equipment to provide energy for each module and manage energy distribution.

2. According to claim 1, a high-efficiency carbon reduction and carbon fixation system based on comprehensive energy utilization of thermal power plant factories is characterized in that: The waste heat recovery and cascade utilization module includes: The waste heat collection unit is used to collect waste heat from the waste heat end of the power plant, and realizes heat capture and transmission by setting up a heat exchanger and insulation pipes; A cascade utilization unit is connected to the waste heat collection unit and is used to use the collected waste heat to preheat the circulating water of the temperature control equipment of the plant factory through an intermediate medium, establish temperature requirements based on predetermined plant areas and growth stages, and use the intermediate medium to achieve temperature control of the circulating water.

3. According to claim 2, a high-efficiency carbon reduction and carbon fixation system based on comprehensive energy utilization of thermal power plant factories is characterized in that: The intelligent lighting control module includes: The light monitoring and data collection unit monitors the light intensity and spectral distribution in the plant factory in real time through an intelligent light sensor network, and collects relevant data and transmits it to the cloud server; The light control execution unit is connected to the cloud server, determines the demand based on the type and growth stage of plants in each area of ​​the current plant factory, and calculates the required light source power in combination with the light-growth rate-photosynthetic efficiency model.

4. According to claim 3, a high-efficiency carbon reduction and carbon fixation system based on comprehensive energy utilization of thermal power plant factories is characterized in that: The light-growth rate-photosynthetic efficiency model is: Among them, P light is the ideal light source power in the area, h is Planck's constant, c is the speed of light; λ is the wavelength of light, which is determined according to the main light wavelength required by the plant species and growth stage; φ is the photon flux density required by the plant, which represents the number of photons per unit area per unit time, and is determined according to the plant species and growth stage; N photon is the area of ​​plant light received, obtained by measurement or estimation; η light It is the luminous efficiency of the light source, which is determined according to the technical parameters of the selected light source.

5. According to claim 4, a high-efficiency carbon reduction and carbon fixation system based on comprehensive energy utilization of thermal power plant factories is characterized in that: The solid waste resource deep utilization module includes: The solid waste nano-processing unit is connected to the solid waste terminal of the power plant and is used to nano-process fly ash and slag by ball milling or air flow milling, and to perform surface modification by chemical coating to improve their dispersibility and stability in the hydroponic nutrient solution; The plant absorption analysis unit is connected to the solid waste nano-processing unit and is used to add nano-sized solid waste particles to the hydroponic nutrient solution, calculate the theoretical release amount of trace elements based on the release-absorption balance model, and optimize the solid waste nano-particle addition strategy.

6. According to claim 5, a highly efficient carbon reduction and carbon fixation system based on comprehensive energy utilization of thermal power plant factories is characterized in that: The release-absorption equilibrium model is: Among them, C release is the theoretical release amount of trace elements in solid waste nanoparticles per unit time; D is the diffusion coefficient of trace elements in solid waste nanoparticles in nutrient solution, which is calculated based on the physical properties of nanoparticles and nutrient solution according to Fick's law; A diff is the effective contact area between the nanoparticles and the nutrient solution, which is estimated based on the particle size, shape and dispersion of the nanoparticles in the nutrient solution; C s is the saturation concentration of trace elements on the surface of nanoparticles, which is calculated based on the composition and physicochemical properties of the nanoparticles; C l is the real-time concentration of trace elements in the nutrient solution; δ is the thickness of the diffusion layer, which is related to the movement and distribution of nanoparticles in the nutrient solution and is estimated by fluid mechanics and particle diffusion theory.

7. The high-efficiency carbon reduction and carbon fixation system based on comprehensive energy utilization of thermal power plant factories according to claim 6 is characterized in that: The water resource circulation purification module comprises: A biofilm treatment unit is connected to the wastewater end of the power plant and is used to construct a biofilm reaction pool, inoculate a microbial community, and utilize microbial metabolism to degrade organic pollutants in the wastewater by controlling dissolved oxygen concentration, temperature and pH value; A reverse osmosis membrane treatment unit is connected to the biofilm treatment unit and adopts a multi-stage reverse osmosis membrane assembly to calculate a purification efficiency index based on a purification efficiency-treatment cost model; based on the difference between the actual purification efficiency index and a preset threshold, the pump head and flow rate are adjusted accordingly or the reverse osmosis membrane is cleaned to improve the purification efficiency so that the purified water reaches the standard defined by the preset threshold of the plant factory.

8. The high-efficiency carbon reduction and carbon fixation system based on comprehensive energy utilization of thermal power plant factories according to claim 7 is characterized in that: The purification efficiency-processing cost model is: Among them, E pur It is a purification efficiency index used to reflect the performance of water purification; ρ is the density of water, g is the acceleration of gravity; H is the head of the high-pressure pump in the reverse osmosis membrane treatment unit, which is determined according to the system pressure requirements; Q is the water flow rate; η pump is the efficiency of the pump, which can be determined according to the type and technical parameters of the pump; Δp is the pressure difference on both sides of the reverse osmosis membrane, which is determined according to the operating pressure requirements of the membrane; C in is the pollutant concentration of wastewater entering the purification process, C out is the pollutant concentration of the purified water; V sys is the volume of the entire biofilm reaction tank, which is calculated based on the design dimensions.

9. The high-efficiency carbon reduction and carbon fixation system based on comprehensive energy utilization of thermal power plant factories according to claim 8 is characterized in that: The flue gas carbon capture supply module comprises: A flue gas carbon capture unit, which is connected to the flue gas end of the power plant, uses polymer membrane separation technology to capture and purify carbon dioxide in the flue gas of the power plant through aluminosilicate molecular sieve membranes, using the regular pore structure of the molecular sieves, and automated valves and pressure control equipment; A precise supply unit is connected to the flue gas carbon capture unit, and based on the carbon supply-photosynthetic rate model, determines the carbon demand flow of each area of ​​each plant factory, and supplies each area of ​​the plant factory based on the carbon demand flow; at the same time, based on the research on the sensitivity of agriculture to changes in the crop growth environment, intelligently coordinates and precisely controls environmental factors such as environmental temperature, humidity, light intensity, culture solution composition and pH value; The carbon supply-photosynthetic rate model is: in, is the carbon dioxide flow supplied to each area of ​​the plant factory, that is, the carbon demand flow; k B is the Boltzmann constant, T is the temperature in the plant factory; A is the total leaf area of ​​the plants in the area, which is determined by estimation; P is the carbon dioxide partial pressure expected to be maintained in the plant factory, which is determined according to the photosynthetic needs of the plants; total is the total air pressure in the plant factory, which is generally taken as standard atmospheric pressure; d is the gas diffusion distance, which is determined according to the layout of the plant factory and the design of the gas supply pipeline; is the mass of a carbon dioxide molecule.

10. The high-efficiency carbon reduction and carbon fixation system based on comprehensive energy utilization of thermal power plant factories according to claim 9 is characterized in that: The carbon dioxide electrocatalytic utilization module comprises: reacting purified carbon dioxide with water, using high-pressure strong electrolysis, and utilizing working condition spectroscopy to achieve carbon species coupling and directional conversion to produce alcohol-like carbon-based compounds.

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