High-efficiency carbon reduction and fixation system based on comprehensive energy utilization of thermal power plant factory

Abstract

The application provides a high-efficiency carbon reduction and fixation system based on thermal power plant factory comprehensive energy utilization, which realizes the deep integration of thermal power and plant factory, uses the waste heat of the power plant to heat the temperature control system of the plant factory, realizes the cascade utilization of the waste heat, converts the solid waste of the power plant into the substrate cultivation carrier and trace element supplement source of the plant factory, improves the added value of the solid waste, adopts the water resource recycling and purification technology to ensure the efficient recycling of the treated water in the plant factory, uses the carbon dioxide in the flue gas of the power plant as the carbon source of the plant to realize the resource utilization of the carbon dioxide, uses the surplus purified carbon dioxide in the flue gas to synthesize alcohol compounds through the high-pressure carbon dioxide electrolysis system alcohol compound synthesis technology, converts the carbon dioxide into alcohol compounds through photovoltaic electric energy, realizes the electrocatalytic recycling utilization of the carbon dioxide to organic matter, uses the energy storage system to provide clean energy for the plant factory, further reduces the carbon emission, and provides an innovative solution for the energy saving, emission reduction and sustainable development of the thermal power industry.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of comprehensive utilization of thermal power, and particularly relates to a high-efficiency carbon reduction and fixation system based on comprehensive energy utilization of a thermal power plant factory. BACKGROUND

[0002] Thermal power has always played an important role in global energy supply. In the past few decades, thermal power technology has been continuously developed, the unit capacity has been continuously increased, and the power generation efficiency has been gradually improved. For example, the application of ultra-supercritical units has significantly improved the efficiency of coal-fired power generation and reduced the 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, thermal power is under great pressure to reduce carbon emissions in the context of global response to climate change. With increasingly stringent environmental protection requirements, thermal power enterprises need to continuously explore new energy-saving and emission-reducing technologies and approaches to achieve sustainable development.

[0003] A plant factory is a highly efficient agricultural system that realizes the year-round continuous 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 suitable spectrum and light intensity according to the growth needs of different plants. At the same time, the automation control system is continuously improved, and real-time monitoring and precise regulation of various environmental parameters in the plant factory can be realized. The development of plant factories helps to improve land utilization rate, ensure the stability of agricultural product supply, and produce higher quality and safer agricultural products.

[0004] At present, although thermal power enterprises have made certain progress in energy saving and emission reduction, there are still problems such as insufficient utilization of waste heat, 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 for low-end building material production, with low added value. The water treated by the power plant cannot be completely recycled and utilized efficiently, resulting in waste of water resources. Carbon dioxide emission in flue gas mainly relies on traditional carbon capture technology, which has high cost and lacks effective resource utilization approach.

[0005] Therefore, there is an urgent need in the art for a high-efficiency carbon reduction and fixation system based on comprehensive energy utilization of a thermal power plant factory to solve the above problems. SUMMARY

[0006] The application provides a high-efficiency carbon reduction and fixation system based on comprehensive energy utilization of a thermal power plant factory, aiming at solving the above problems; by deeply integrating the thermal power and the plant factory, using the plant waste heat to heat the plant factory temperature control system, realizing the cascade utilization of waste heat; converting the power plant solid waste into the substrate cultivation carrier and trace element supplement source of the plant factory, improving the added value of the solid waste; adopting water resource recycling purification technology to ensure the efficient recycling of the power plant treated water in the plant factory; using the carbon dioxide in the power plant flue gas as the carbon source of the plant to realize the resource utilization of the carbon dioxide; through the alcohol compound synthesis technology of the high-pressure carbon dioxide electrolysis system, the carbon dioxide is converted into alcohol compounds by photovoltaic power, realizing the electrocatalytic recycling of the carbon dioxide to organic matter; at the same time, the photovoltaic solar energy and the energy storage system are used to provide clean energy for the plant factory, further reducing the carbon emission of the system, and providing an innovative solution for the energy saving, emission reduction and sustainable development of the thermal power industry.

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

[0008] The waste heat recovery and cascade utilization module is connected with the power plant waste heat end and the plant factory, is used for collecting the power plant waste heat and realizing cascade utilization, and provides heat for the plant factory temperature control system;

[0009] The intelligent illumination control module is arranged in the plant factory, is used for monitoring the plant demand, and adjusts the light source power;

[0010] The solid waste resource deep utilization module is connected with the power plant solid waste end and the plant factory, is used for pretreating the power plant solid waste, adjusting the solid waste application amount to balance the trace element demand of the plant;

[0011] The water resource recycling purification module is connected with the power plant waste water end and the plant factory, is used for recycling and purifying the power plant treated water, determining the purification efficiency index, and adjusting the water supply amount to the plant factory based on the purification efficiency index;

[0012] The flue gas carbon capture and supply module is connected with the power plant flue gas end and the plant factory, is used for capturing the carbon dioxide in the flue gas, and adjusting the carbon dioxide flow rate delivered to different areas of the plant factory;

[0013] The carbon dioxide electrocatalytic utilization module is used for reacting the purified carbon dioxide and water through a high-pressure electrolysis method, realizing the carbon species coupling and directional conversion through the working condition spectrum, and producing alcohol-like carbon compounds;

[0014] An energy storage management module connected with the waste heat recovery and cascade utilization module, the intelligent light regulation module, the solid waste resource deep utilization module, the water resource recycling and purification module, the flue gas carbon capture supply module and the carbon dioxide electro-catalytic utilization module, for providing energy for each module by photovoltaic solar energy and energy storage equipment and managing energy distribution.

[0015] According to the application, the waste heat recovery and cascade utilization module comprises:

[0016] A waste heat collection unit for collecting waste heat from the waste heat end of the power plant, heat capture and transmission being achieved by arranging heat exchangers and heat preservation pipelines.

[0017] A cascade utilization unit connected with the waste heat collection unit, for preheating the circulating water of the plant factory temperature control equipment by the collected waste heat through an intermediate medium, temperature demand being established based on the predetermined plant area and growth stage, and the temperature of the circulating water being regulated by the intermediate medium.

[0018] According to the application, the intelligent light regulation module comprises:

[0019] A light monitoring and data acquisition unit for monitoring the light intensity and spectral distribution in the plant factory in real time by an intelligent light sensor network and acquiring relevant data and transmitting the data to a cloud server.

[0020] A light regulation execution unit connected with the cloud server, for determining the demand based on the types and growth stages of the plants in each area of the plant factory, and calculating the required light source power by combining a light-growth rate-photosynthetic efficiency model.

[0021] According to the application, the light-growth rate-photosynthetic efficiency model is:

[0022]

[0023] wherein P is the ideal light source power of the area, h is the Planck constant, c is the speed of light, λ is the wavelength of light, determined according to the main light wavelength required by the type and growth stage of the plant, φ is the photon flux density required by the plant, representing the number of photons per unit time per unit area, determined according to the type and growth stage of the plant, N is the light receiving area of the plant, obtained by measurement or estimation, and η is the light emitting efficiency of the light source, determined according to the technical parameters of the selected light source. light photon light

[0024] ​​​The application provides a high-efficiency carbon reduction and carbon fixation system based on a thermal power plant factory comprehensive energy utilization, and the solid waste resource deep utilization module comprises:

[0025] A solid waste nanocrystallization treatment unit is connected with the solid waste end of the power plant, and is used for nanocrystallizing fly ash and slag by adopting a ball milling method or an airflow crushing method and performing surface modification treatment by a chemical coating method, so that the dispersibility and stability of the fly ash and slag in the water culture nutrient solution are improved.

[0026] A plant absorption analysis unit is connected with the solid waste nanocrystallization treatment unit, is used for adding the nanocrystallized solid waste particles to the water culture nutrient solution, and is used for calculating the theoretical release amount of trace elements according to a release-absorption balance model and optimizing a solid waste nanocrystalline particle addition strategy.

[0027] The application provides a high-efficiency carbon reduction and carbon fixation system based on a thermal power plant factory comprehensive energy utilization, and the release-absorption balance model is as follows:

[0028]

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

[0030] The application provides a high-efficiency carbon reduction and carbon fixation system based on a thermal power plant factory comprehensive energy utilization, and the water resource circulation and purification module comprises:

[0031] A biological membrane treatment unit is connected with the wastewater end of the power plant, is used for constructing a biological membrane reaction tank, inoculating a microbial community, and degrading organic pollutants in wastewater by controlling the dissolved oxygen concentration, temperature and pH value and utilizing the metabolic action of microorganisms;

[0032] A reverse osmosis membrane treatment unit is connected with the biological membrane treatment unit, adopts a multistage reverse osmosis membrane assembly, calculates a purification efficiency index according to a purification efficiency-treatment cost model, adjusts the lift and flow of the pump or cleans the reverse osmosis membrane based on the difference between the actual purification efficiency index and a preset threshold value to improve the purification efficiency, and makes the purified water reach a standard defined by the preset threshold value of the plant factory.

[0033] According to the high-efficiency carbon reduction and fixation system based on the comprehensive energy utilization of the thermal power plant factory provided by the application, the purification efficiency-treatment cost model is:

[0034]

[0035] Wherein, E pur is a purification efficiency index, used to reflect the performance of water purification; p 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, determined according to the system pressure requirement; Q is the flow of water; 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, determined according to the operating pressure requirement of the membrane; C in is the concentration of wastewater pollutants entering the purification process, C out is the concentration of pollutants in the purified water; V sys is the volume of the entire biological membrane reaction tank, calculated by the design size.

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

[0037] A flue gas carbon capture unit connected with the power plant flue gas end, using high polymer membrane separation technology, capturing and purifying carbon dioxide in the power plant flue gas through a silicate molecular sieve membrane, using the regular pore structure of the molecular sieve and automatic valves and pressure control equipment;

[0038] A precise supply unit connected with the flue gas carbon capture unit, based on a carbon supply-photosynthetic rate model, determining the carbon demand flow of each area of the plant factory, and supplying each area of the plant factory based on the carbon demand flow; at the same time, based on the sensitivity research of agriculture on the change of crop growth environment, intelligently coordinating and precisely controlling 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] Wherein, is the carbon dioxide flow supplied to each area of the plant factory, i.e. 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, determined by estimation; is the carbon dioxide partial pressure expected to be maintained in the plant factory, determined according to the photosynthetic demand of plants; P totalThe total gas pressure in the plant factory is generally taken as the 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; The mass of the carbon dioxide molecule.

[0042] According to the application, an efficient carbon reduction and fixation system based on the comprehensive energy utilization of a thermal power plant is provided.

[0043] Compared with the prior art, the application has the following beneficial effects:

[0044] The waste heat recovery and cascade utilization module in the 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 the waste heat for the temperature control system of the plant factory.

[0045] The current treatment method of the solid waste (such as fly ash and slag) of the power plant is relatively single, and is mostly applied in the field of low-value-added building materials; the solid waste resource deep utilization module in the application converts the solid waste into nano-sized particles through the solid waste nanocrystallization treatment unit, and performs surface modification treatment, so that the solid waste can be added to the water culture nutrient solution of the plant factory as a trace element supplement source; this method not only improves the added value of the solid waste, but also realizes the recycling of the solid waste resources in the agricultural field, reduces the occupation and potential pollution of the solid waste to the environment;

[0046] The water resource circulation and purification module in the application adopts the combination of the biological membrane treatment unit and the reverse osmosis membrane treatment unit, accurately controls the operation parameters according to the purification efficiency-treatment cost model, and deeply purifies and recycles the water treated by the power plant; this makes the water resources be able to realize efficient circulation in the plant factory, greatly improves the utilization rate of the water resources, reduces the dependence on external water resources, reduces the production cost, and also reduces the pressure of the power plant wastewater discharge on the environment;

[0047] The flue gas carbon capture and supply module in the application captures carbon dioxide in the flue gas through the high polymer membrane separation technology, accurately supplies different areas of the plant factory according to the carbon supply-photosynthesis rate model, and converts the carbon dioxide into carbon resources required for plant growth; meanwhile, based on the sensitivity research of agriculture on the change of the crop growth environment, the environmental factors such as the environmental temperature, humidity, light intensity, culture solution composition and PH value are intelligently coordinated and accurately controlled; this not only reduces the emission of carbon dioxide in the power plant, but also realizes the resourceization of carbon dioxide, which is helpful for building a low-carbon or even negative-carbon energy-agricultural ecological system, and has a positive significance for alleviating global climate change;

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

[0049] The present application calculates the release amount 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, can more accurately provide the required trace elements for plants, ensures the nutritional balance of plants during the entire growth cycle, further improves the health status and stress resistance of plants, and thus improves the overall production benefit of the plant factory.

[0050] The present application provides a catalytic reaction technology, which uses two relatively common substances, carbon dioxide and water, as raw materials, especially carbon dioxide from power plant flue gas and water from water resource recycling and purification module; this realizes 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, using high-pressure electrolysis combined with work spectrum to realize carbon species coupling and directional conversion is an advanced catalytic technology, which can accurately control the conversion process of carbon dioxide, making the reaction proceed in the direction of generating alcohol-like carbon-based compounds. Compared with traditional carbon dioxide utilization technology, the present application has higher selectivity and conversion rate.

[0051] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent to those skilled in the art from the description, or can be learned by practice of the present application. The objects and other advantages of the present application can be achieved and obtained by the structure particularly pointed out in the written description and the accompanying drawings.

[0052] The technical solutions of the present application will be further described in detail below by means of the accompanying drawings and examples. BRIEF DESCRIPTION OF DRAWINGS

[0053] The accompanying drawings are intended to provide a further understanding of the present application, and constitute a part of the specification, together with the embodiments of the present application, to explain the present application, and do not constitute a limitation on the present application. In the drawings:

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

[0055] The preferred embodiments of the present application are described below in conjunction with the accompanying drawings, it should be understood that the preferred embodiments described herein are merely intended to illustrate and explain the present application, and are not intended to limit the present application.

[0056] Embodiment 1:

[0057] The embodiment of the present application provides a high-efficiency carbon reduction and fixation system based on thermal power plant factory comprehensive energy utilization, please refer to Figure 1 , comprising:

[0058] The waste heat recovery and cascade utilization module is connected with the waste heat end of the power plant and the plant factory, and is used for collecting waste heat of the power plant and performing cascade utilization, so as to provide heat for the temperature control system of the plant factory;

[0059] The intelligent light regulation module is arranged in the plant factory, and is used for monitoring plant demand and corresponding light source power regulation;

[0060] The solid waste resource deep utilization module is connected with the solid waste end of the power plant and the plant factory, and is used for pretreating the solid waste of the power plant and adjusting the application amount of the solid waste to balance the trace element demand of the plant;

[0061] The water resource circulation and purification module is connected with the wastewater end of the power plant and the plant factory, and is used for circulating and purifying the treated water of the power plant, determining a purification efficiency index, and adjusting the water supply amount to the plant factory based on the purification efficiency index;

[0062] The flue gas carbon capture and supply module is connected with the flue gas end of the power plant and the plant factory, and is used for capturing carbon dioxide in the flue gas and adjusting the carbon dioxide flow rate delivered to different areas of the plant factory;

[0063] The carbon dioxide electrocatalytic utilization module is used for reacting the purified carbon dioxide and water through high-pressure electrolysis, and realizing carbon species coupling and directional conversion through working condition spectrum, so as to produce alcohol-like carbon-based compounds;

[0064] The energy storage management module is connected with the waste heat recovery and cascade utilization module, the intelligent light regulation module, the solid waste resource deep utilization module, the water resource circulation and purification module, the flue gas carbon capture and supply module, and the carbon dioxide electrocatalytic utilization module, and is used for providing energy for each module by using photovoltaic solar energy and energy storage equipment and managing energy distribution.

[0065] The principle and benefits of the embodiment are as follows: energy is collected from the waste heat generated by the power plant, and the waste heat is distributed to different systems in the plant factory according to different temperature requirements, such as the temperature control system; in this way, not only can the energy that would otherwise be wasted be effectively utilized, but the additional heating cost can also be reduced; the sensors installed inside the plant factory monitor the plant growth status, automatically adjust the intensity and spectrum of the light source such as LED lights, and ensure that the plants receive the most suitable light conditions while saving energy; the solid waste generated by the power plant is treated and used as fertilizer or other useful substances in the plant growth process, realizing waste recycling; the wastewater discharged by the power plant is recovered, treated to meet the reusable standard, and used for irrigation in the plant factory, reducing the demand for fresh water sources; advanced carbon capture technology is used to extract carbon dioxide from the flue gas discharged by the power plant, and the carbon dioxide is transported to the plant factory as one of the raw materials required for plant photosynthesis, which not only reduces greenhouse gas emissions but also promotes plant growth; the excess purified carbon dioxide in the flue gas is converted into alcohol compounds through a high-pressure carbon dioxide electrolysis system alcohol compound synthesis technology, and the carbon dioxide is converted into alcohol compounds through photovoltaic power, realizing the electrocatalytic recycling of carbon dioxide to organic matter; combining photovoltaic solar power generation and energy storage devices, the entire system provides stable power supply and optimizes energy allocation to improve energy efficiency.

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

[0067] A waste heat collection unit is used to collect waste heat from the power plant waste heat end, and heat capture and transmission are achieved through the setting of heat exchangers and heat preservation pipelines;

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

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

[0070] The selection of the heat preservation pipeline is also crucial. A multi-layer composite insulation material is used, such as a high-temperature-resistant aluminum silicate fiber felt for the inner layer, a polyurethane foam insulation layer for the middle layer, and a waterproof and corrosion-resistant aluminum foil or stainless steel sheet for the outer layer. By reasonably designing the thickness of the insulation layer, calculating the heat loss in the transmission process according to the pipeline length, environmental temperature, and residual heat temperature, etc., the thermal conductivity of the heat preservation pipeline is ensured to be as low as possible, reducing the heat loss in the transmission process, and enabling the residual heat to be transmitted to the cascade utilization unit to the maximum extent.

[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 residual heat in real time. These sensors are connected to the automatic control system, which can adjust the operating parameters of the heat exchanger, such as adjusting the flow, flow rate of the intermediate medium, or changing the heat exchange area (by controlling the opening and closing of part of the heat exchange pipes through valves), to ensure the stability and efficiency of the residual heat collection process. For example, when the residual heat temperature rises, the flow of the intermediate medium is automatically increased to speed up the heat exchange rate, prevent the heat exchanger from being damaged due to overheating, and improve the efficiency of residual heat collection.

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

[0073] To improve the heat exchange efficiency between the intermediate medium and the circulating water, the heat exchanger design in the preheating section and the temperature regulation section is optimized. High-efficiency plate heat exchangers are used, which have high heat transfer efficiency, compact structure, and small footprint. By increasing the number of heat exchanger plates, optimizing the corrugation shape and spacing of the plates, etc., the heat transfer coefficient between the intermediate medium and the circulating water is improved, achieving rapid and uniform heat exchange, so that the circulating water can quickly reach the required preheating temperature, and precise temperature regulation can be achieved in different plant areas and growth stages.

[0074] It should also be noted that according to the predetermined plant area (such as the seedling area, the growth area, the flowering and fruiting area, etc.) and the accurate requirement of temperature at different plant varieties in each growth stage (such as the seed germination period, the seedling period, the vegetative growth period, the reproductive growth period, etc.), a detailed temperature control strategy is established. For example, in the seedling area, a higher temperature (such as 25-30°C) is required during the seed germination period, at which time the circulating water temperature is accurately maintained in this range by controlling the flow of the intermediate medium and the heat exchange power of the heat exchanger, so as to promote rapid seed germination. In the growth area, the adaptability of plants to temperature during the vegetative growth period is relatively strong, but it still needs to be maintained within a suitable range (such as 20-25°C), and the temperature change is monitored in real time by the partition temperature sensor, and the supply amount of the intermediate medium is automatically adjusted to realize dynamic temperature control.

[0075] The partition control technology is adopted to set up an independent temperature control system for each plant area, including temperature sensors, electric regulating valves and controllers and other equipment. The temperature sensors monitor the actual temperature of each area in real time and transmit the signals to the controller, which accurately controls the flow of the intermediate medium into the heat exchanger of the area through the electric regulating valve according to the preset temperature requirement, so as to realize independent regulation and control of the temperature of each area. In this way, the temperature interference between different areas can be avoided, the plants in each area can grow in the most suitable temperature environment, the growth quality and yield of the plants are improved, and the efficiency and accuracy of waste heat utilization are further improved.

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

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

[0078] The light control execution unit is connected with the cloud server, determines the demand based on the types and growth stages of the 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] wherein, P light is the ideal light source power of the area, h is the Planck 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 variety 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 variety and growth stage; N photon is the light receiving area of the plant, which is measured or estimated; η lightThe light emitting efficiency of the light source is determined according to the technical parameters of the selected light source.

[0082] It should be noted that, according to the layout and planting area distribution of the plant factory, the intelligent light sensing sensor network is arranged by combining uniform distribution with emphasis on key areas; regular grid layout is adopted in large-area 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 raising 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 fast response time to capture the changes in the light environment in real time; for example, the selected light sensor has a resolution of 1 pmol / m 2 ·s in the 400 nm-700 nm visible light band, and can also provide accurate measurement data in the 700 nm-1000 nm near-infrared light band, with a response time of less than 1 s, ensuring that the collected data accurately reflects the actual light 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; between the sensor and the local data acquisition node, low-power and high-reliability wireless communication technology (such as ZigBee or Bluetooth) is used 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, which is powered by a rechargeable battery and supplemented by a solar panel to achieve long-term stable operation of the sensor and avoid data interruption caused by power problems;

[0084] After receiving the light monitoring data, the cloud server first performs real-time analysis and processing on the data; combined with the types and growth stages of plants in each area of the plant factory, the corresponding light demand parameters are retrieved from the pre-established plant light demand database; this database contains detailed requirements for light intensity, spectral distribution, and light time for various common plants (such as vegetables, flowers, fruits, etc.) in different growth stages (from seed germination to mature harvest); for example, for lettuce in the seedling stage, a higher proportion of blue light (400 nm-500 nm band accounting for 40%-50% of total light intensity) and relatively lower light intensity (100 pmol / m 2 ·s-150 pmol / m 2 ·s) are required; in the vigorous growth stage, the proportion of blue light and red light (600 nm-700 nm) should be balanced (each accounting for 30%-40%), and the light intensity should be increased to 200 pmol / m2 • s-300 μmol / m 2 • s; the cloud server determines the light demand deviation of the plants in each region according to the demand parameters and real-time monitoring data, and provides accurate basis for light regulation;

[0085] The machine learning algorithm is used to correlate the light data and plant growth data, and a prediction model of light and plant growth state is established. Through long-term accumulation of historical data, the model is trained to predict the growth rate, biomass accumulation and quality change of plants under different light conditions. For example, a neural network algorithm is used, taking light intensity, spectral distribution, light time, and plant variety, growth stage, etc. as input parameters, and plant growth rate, leaf area, chlorophyll content, etc. as output parameters, to train the model. After a large amount of data training, the model can predict the growth trend of plants according to real-time light data, find possible light problems in advance, and provide optimization suggestions for light regulation;

[0086] The wavelength of light is determined according to the main light wavelength required by the current growth stage of the plant. For example, during the period when blue light demand is high, λ is 450 nm;

[0087] The light regulation execution unit controls the working state of artificial light sources (such as LED lamps) through the intelligent power distribution system according to the light source power instructions calculated by the cloud server. Adjustable brightness and spectrum LED lamp modules are used to adjust the brightness of the light by changing the driving current, and the combination of different color LED chips is used to realize dynamic regulation of the light spectrum. For example, when the proportion of blue light needs to be increased, the driving current of the blue LED chip is increased, and the currents of other color chips are adjusted accordingly, so that the spectral distribution meets the plant demand. The intelligent power distribution system can realize independent control of each region and each group of lamps, ensuring the accuracy and flexibility of light regulation. At the same time, a light feedback adjustment mechanism is set up to compare the actual light condition after regulation with the target value by collecting light data again. If there is a deviation, fine-tuning is performed in time to further improve the accuracy of light regulation and provide the most suitable light environment for plant growth.

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

[0089] The solid waste nanocrystallization treatment unit is connected with the solid waste end of the power plant, which is used to nanocrystallize fly ash and slag by ball milling or air flow crushing method, and to improve its dispersibility and stability in hydroponic nutrient solution by chemical coating method;

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

[0091] The release-absorption balance model is:

[0092]

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

[0094] It should be noted that the grinding ball and the ball mill tank body of appropriate material and size are selected. High hardness, wear-resistant ceramic or alloy steel grinding balls are used, the diameter of the grinding ball is determined according to the hardness of fly ash and slag and the required nanization degree, for example, larger diameter (10mm-20mm) grinding balls are used in the initial coarse grinding stage, and smaller diameter (1mm-5mm) grinding balls are used in the later fine grinding stage, to improve the grinding efficiency and nanization effect. At the same time, the speed of the ball mill and the ball material ratio are optimized. The best speed range is determined by experiment, generally between 200rpm and 600rpm, which can ensure the grinding energy and avoid excessive grinding leading to agglomeration. The ball material ratio is controlled between 5:1 and 20:1, the number of grinding balls is accurately adjusted according to the solid waste feed quantity, to ensure that the material is fully ground during the ball milling process. In the ball milling process, inert gas protection (such as nitrogen) is introduced to prevent the oxidation of active ingredients in fly ash and slag, which affects the effect of subsequent microelement supplement source.

[0095] For the jet milling method, the airflow speed and the feeding speed are precisely controlled. According to the physical properties of the solid waste and the desired nanoparticle size, the airflow speed is adjusted between 200 m / s and 500 m / s, and the feeding speed is adjusted between 1 kg / h and 10 kg / h. An ultrasonic airflow nozzle is designed to allow the solid waste particles to collide and be crushed in the high-speed airflow. At the same time, a grading device is installed in the crushing chamber to separate the nanoparticles that have reached the desired size in real time, avoiding excessive crushing and agglomeration, and improving the uniformity of the nanoparticle size. For example, the rotational speed of the grading wheel can be adjusted according to the target particle size. When the target particle size is between 50 nm and 100 nm, the rotational speed of the grading wheel is controlled between 3000 rpm and 6000 rpm.

[0096] When performing surface modification treatment using the chemical coating method, a suitable surface modifier is selected. For improving the dispersibility and stability in the hydroponic nutrient solution, silane coupling agent, titanate coupling agent, or fatty acid salt can be selected. Taking the silane coupling agent as an example, according to the surface chemical properties of fly ash and slag, a silane coupling agent containing specific functional groups (such as amino, epoxy, and mercapto) is selected to ensure good chemical bonding with the surface of the 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, generally 1% to 5% of the mass of the solid waste. Solution immersion or spraying method is used for surface modification treatment to ensure uniform coating of the coupling agent on the surface of the nanoparticles. In the solution immersion method, the immersion time is controlled between 30 minutes and 120 minutes, and the immersion temperature is controlled between 30°C and 60°C. Then, through drying treatment, the solvent is removed, and the coupling agent is firmly combined on the surface of the nanoparticles, forming a stable coating layer, effectively improving the dispersibility and stability of the nanoparticles in the nutrient solution, and preventing agglomeration.

[0097] In the model, in addition to experimental determination, molecular dynamics simulation method can also be used to assist in calculating the diffusion coefficient. A molecular model of the nanoparticle-nutrient solution system is established to simulate the diffusion behavior of the nanoparticles in the nutrient solution. The displacement of the nanoparticles in a certain time is statistically analyzed, and the diffusion coefficient is calculated according to the Einstein-Smoluchowski equation. This method can deeply understand the mechanism of the diffusion process at the microscopic level, provide theoretical support and supplement for experimental determination, and predict the trend of the diffusion coefficient under different conditions (such as temperature and concentration changes), which is helpful for more accurately controlling the release of trace elements in the solid waste nanoparticles.

[0098] To further optimize the above embodiments, the water resource recycling purification module comprises:

[0099] A biofilm treatment unit is connected to the power plant wastewater end for constructing a biofilm reaction tank, inoculating a microbial community, and degrading organic pollutants in the wastewater through the metabolic action of microorganisms by controlling the dissolved oxygen concentration, temperature, and pH value;

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

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

[0102]

[0103] wherein, E pur is a purification efficiency index, used to reflect the performance of water purification; p 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, determined according to the system pressure requirement; Q is the flow rate of water; 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, determined according to the operating pressure requirement of the membrane; C in is the pollutant concentration of the 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, calculated by the design size.

[0104] It should be noted that the structural design of the biofilm reaction tank is crucial for the attachment of microorganisms and the wastewater treatment effect. A possible implementation is to use a modular reaction tank structure, which facilitates flexible combination and expansion according to the actual water treatment capacity and water quality. Inside the reaction tank, a reasonable water flow channel and aeration system are set up to ensure that the wastewater can uniformly flow through the surface of the biofilm and provide sufficient oxygen. For example, a water flow channel design of the zigzag type or plug flow type is adopted to form a stable water flow state in the reaction tank, prolong the contact time of wastewater and biofilm, and improve the degradation efficiency of organic pollutants. The aeration system adopts a microporous aeration disc or a tubular aerator, which is uniformly distributed at the bottom of the reaction tank. By adjusting the aeration intensity, the dissolved oxygen concentration is controlled between 2mg / L-6mg / L to meet the oxygen demand of different microbial communities.

[0105] The selection and cultivation of microbial communities are crucial for the biofilm treatment unit. In view of the water quality characteristics of power plant wastewater (such as containing organic matter, ammonia nitrogen and other pollutants), efficient microbial flora are screened and acclimated. By collecting microbial samples from power plant wastewater treatment sites or other similar environments, enrichment culture and acclimation are carried out in the laboratory to adapt to the water quality and environmental conditions of power plant wastewater. At the same time, the structure and activity of the microbial community are regularly monitored, 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 inoculants are supplemented or adjusted in a timely manner to maintain the stability and high degradation capacity of the microbial community. For example, when the number of certain key degrading bacteria decreases or their activity decreases, the corresponding inoculants are added in time to ensure the sustained and efficient degradation of organic pollutants in wastewater by the biofilm.

[0106] In addition to adjusting the aeration system, the dissolved oxygen concentration can also be precisely controlled by combining online dissolved oxygen monitors and automatic control systems. When the dissolved oxygen concentration is below the set lower limit (such as 2 mg / L), the aeration intensity is automatically increased; when the dissolved oxygen concentration is above 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. For temperature control, a constant temperature control system is used, and for mesophilic microbial treatment processes, the reaction tank temperature is controlled between 20°C and 35°C. By setting insulation layers, heating or cooling coils around the reaction tank, and other facilities, the reaction tank temperature is automatically adjusted according to seasonal and environmental temperature changes to ensure that the microorganisms are in the optimal metabolic temperature range. The pH value is adjusted by online pH monitors and acid-base addition systems. When the wastewater pH deviates from the suitable range for microorganisms (such as 6.5-8.5), acid or base adjusting agents (such as sulfuric acid or sodium hydroxide) are automatically added for adjustment to maintain a stable acid-base environment in the reaction tank, promoting normal growth and metabolism of microorganisms.

[0107] When the actual purification efficiency indicator is below the threshold value, first analyze the reasons, which may be membrane fouling leading to a decrease in water flux, a decrease in pump efficiency, or unreasonable operating parameters, etc. If it is a membrane fouling problem, clean the reverse osmosis membrane in time, which can be combined with chemical cleaning (such as acid washing, alkali washing, oxidizing agent cleaning, etc.) and physical cleaning (such as flushing, backwashing, etc.) to restore the performance of the membrane. At the same time, according to the actual situation, adjust the pump head, flow or optimize the operating parameters (such as pressure difference, concentrated water reflux ratio, etc.) to improve the purification efficiency and ensure that the purified water meets the standards defined by the plant factory preset threshold value, achieving efficient recycling and purification of water resources. Regularly evaluate and optimize the performance of the system, and according to long-term operation data and actual conditions, modify and improve the parameters in the model to improve the stability and reliability of the system operation.

[0108] To further optimize the above embodiment, the flue gas carbon capture supply module comprises:

[0109] A flue gas carbon capture unit connected with the flue gas end of the power plant, using high polymer membrane separation technology, capturing and purifying carbon dioxide in the flue gas of the power plant through a silicate molecular sieve membrane, using the regular pore structure of the molecular sieve and automatic valves and pressure control equipment;

[0110] A precise supply unit connected with the flue gas carbon capture unit, determining the carbon demand flow of each area of the plant factory based on the carbon supply-photosynthetic rate model, and supplying each area of the plant factory based on the carbon demand flow; At the same time, based on the sensitivity research of agriculture to the change of crop growth environment, intelligently coordinating and precisely controlling 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] Among them, is the carbon dioxide flow supplied to each area of the plant factory, i.e. 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; is the carbon dioxide partial pressure expected to be maintained in the plant factory, which is determined according to the photosynthetic demand of plants; P total is the total gas pressure in the plant factory, generally taking the 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 carbon dioxide molecules.

[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. Different gases have different permeation rates, and CO2 in the flue gas is more preferentially permeated through the membrane than other components of air, so that the CO2 concentration on the permeation side of the membrane assembly is enriched after passing through the membrane assembly and enters the plant factory. When the CO2 concentration in 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 pressure of the permeation side gas in this project is designed to be 0.2 MPaG, and the high-concentration carbon dioxide can be directly returned to the chimney inlet along the laid pipeline. The pressure loss of the retentate side flue gas is small and can be directly returned to the chimney inlet along the laid pipeline.

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

[0116] Molecular sieve is a crystal with regular pore structure, mainly made of silicate, with a pore size usually less than 1 nm. Molecular sieve membrane is a continuous film formed by the intergrowth of molecular sieve crystals, which realizes the separation of different gas components by using the regular pore structure of molecular sieve. Figure 1 Molecular sieve membrane not only has the advantages of adjustable pore size and surface chemical properties, excellent thermal and chemical stability, but also can improve permeability and selectivity, breaking the trade-off limit of polymer membrane, and is an ideal membrane material for gas separation in harsh environments.

[0117] The layout of the gas supply system adopts the combination of zoned gas supply and uniform gas distribution. According to the differences in plant species, planting density and growth stage in different areas of the plant factory, multiple gas supply areas are divided, and independent gas supply pipelines and flow regulating devices are set up in each area. In the design of gas supply pipeline, ring or branch pipe network structure is adopted to ensure that carbon dioxide gas can be evenly distributed around each plant. Gas diffusers such as microporous aeration heads or atomizing nozzles are installed at the end of the pipeline to release carbon dioxide gas in the form of small bubbles or mist, increase the contact area between gas and plants, and improve the absorption efficiency of carbon dioxide. For example, the pore size of microporous aeration head can be controlled between tens of microns and hundreds of microns, and the generated bubbles have small diameter and slow rising speed, which is beneficial to the full diffusion and absorption of carbon dioxide around the plants.

[0118] A dynamic control strategy is established to adjust the carbon dioxide supply amount in real time according to the real-time changes and environmental factor fluctuations in the plant growth process. In addition to the basic supply amount calculated according to the carbon supply-photosynthetic rate model, the actual growth state of the plant (such as growth rate, leaf color, biomass accumulation, etc.) and the influence of environmental factors (such as light intensity, temperature, humidity, etc.) on photosynthesis are also considered. By monitoring the plant growth indicators (such as measuring the photosynthetic rate and transpiration rate using a plant physiology monitor) and environmental parameters online, when the plant photosynthetic rate changes or the environmental conditions change, the carbon demand flow calculation parameters are corrected in real time, and the carbon dioxide supply amount is adjusted. For example, when the light intensity suddenly increases, the plant photosynthesis is enhanced, and the carbon dioxide supply amount may need to be increased; when the temperature is too high or the humidity is too large, the stomata of the plant are closed, the photosynthesis is inhibited, and the carbon dioxide supply amount can be appropriately reduced to avoid gas accumulation and waste, realize precise dynamic control of carbon dioxide supply, and improve the production efficiency and resource utilization efficiency of the plant factory.

[0119] To further optimize the above embodiments, the carbon dioxide electrocatalytic utilization module produces alcohol-like carbon-based compounds by reacting purified carbon dioxide and water through high-pressure electrolysis, and realizes carbon species coupling and directional conversion through work condition spectroscopy.

[0120] It should be noted that carbon dioxide catalysis realizes efficient C-C coupling and directional conversion of alcohol products through high-selectivity and high-conversion-rate catalytic materials suitable for pressurized working conditions, and the process requires high-reliability and stable internal pressure.

[0121] The internal pressurization and temperature control flow device for maintaining the catalytic reaction needs to be constructed by building a new type of porous electrode structure and internal and external pressure control and pressure stabilizing flow path to ensure the continuous stability of the three-phase interface, that is, a new type of high-pressure three-phase interface high-efficiency CO2 electrolysis device. The internal pressure of the reactor is controlled by a gas control back pressure valve, and the pressure difference is finely adjusted to maintain the stable existence of the interface. At the same time, the input current of the controllable electric pile for time 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 application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for some technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A high-efficiency carbon reduction and fixation system based on the comprehensive energy utilization of a thermal power plant factory, characterized in that, The application relates to a plant factory system, which comprises the following modules: a waste heat recovery and cascade utilization module connected with a waste heat end of a power plant and a plant factory, which is used for collecting waste heat of the power plant and performing cascade utilization to provide heat for a temperature control system of the plant factory; an intelligent light regulation module arranged in the plant factory, which is used for monitoring plant requirements and regulating light source power; a solid waste resource deep utilization module connected with a solid waste end of the power plant and the plant factory, which is used for pretreating solid waste of the power plant and adjusting a solid waste application amount to balance trace element requirements of plants; a water resource circulation and purification module connected with a waste water end of the power plant and the plant factory, which is used for circulating and purifying treated water of the power plant, determining a purification efficiency index, and adjusting a water supply amount to the plant factory based on the purification efficiency index; a flue gas carbon capture and supply module connected with a flue gas end of the power plant and the plant factory, which is used for capturing carbon dioxide in flue gas and adjusting carbon dioxide flow rates delivered to different regions of the plant factory; a carbon dioxide electrocatalytic utilization module, which is used for reacting purified carbon dioxide and water through high-pressure electrolysis to realize carbon species coupling and directional conversion by using a working condition spectrum, and produce alcohol-like carbon-based compounds; an energy storage management module connected with the waste heat recovery and cascade utilization module, the intelligent light regulation module, the solid waste resource deep utilization module, the water resource circulation and purification module, the flue gas carbon capture and supply module and the carbon dioxide electrocatalytic utilization module, which is used for providing energy for the modules by using photovoltaic solar energy and energy storage equipment and managing energy distribution; The solid waste resource deep utilization module comprises: a solid waste nanocrystallization treatment unit connected with the solid waste end of the power plant, which is used for nanocrystallizing fly ash and slag by adopting a ball milling method or an airflow crushing method, and performing surface modification treatment by adopting a chemical coating method to improve dispersibility and stability of the nanocrystallized solid waste in hydroponic nutrient solution; a plant absorption analysis unit connected with the solid waste nanocrystallization treatment unit, which is used for adding nanocrystallized solid waste particles to the hydroponic nutrient solution, calculating a theoretical release amount of trace elements according to a release-absorption balance model, and optimizing a solid waste nanocrystalline particle addition strategy; The waste heat recovery and cascade utilization module comprises: ； wherein, is the theoretical release amount of trace elements in the solid waste nanoparticles per unit time; is the diffusion coefficient of trace elements in the solid waste nanoparticles in the nutrient solution, which is calculated according to Fick's law through the physical properties of the nanoparticles and the nutrient solution; is the effective contact area of the nanoparticles with the nutrient solution, which is estimated according to the particle size, shape, and dispersion of the nanoparticles in the nutrient solution; is the saturation concentration of trace elements on the surface of the nanoparticles, which is calculated according to the composition and physicochemical properties of the nanoparticles; is the real-time concentration of trace elements in the nutrient solution; is the diffusion layer thickness, which is related to the movement and distribution of the nanoparticles in the nutrient solution, and is estimated through fluid mechanics and particle diffusion theory.

2. The high-efficiency carbon reduction and fixation system based on the integrated energy utilization of a thermal power plant factory according to claim 1, characterized in that, a waste heat collection unit, which is used for collecting waste heat from the waste heat end of the power plant, and realizes heat capture and transmission by arranging heat exchangers and heat preservation pipelines; a cascade utilization unit connected with the waste heat collection unit, which is used for preheating circulating water of a temperature control device of the plant factory by using collected waste heat and an intermediate medium, establishing temperature requirements based on predetermined plant regions and growth stages, and realizing temperature regulation of the circulating water by using the intermediate medium. The intelligent light regulation module comprises:

3. The high-efficiency carbon reduction and fixation system based on the integrated energy utilization of a thermal power plant factory according to claim 2, characterized in that, a light monitoring and data acquisition unit, which is used for monitoring light intensity and spectral distribution in the plant factory in real time by using an intelligent light sensor network, and collecting relevant data and transmitting the data to a cloud server; a light regulation execution unit connected with the cloud server, which is used for determining requirements of plants in each region of the plant factory based on plant types and growth stages, and calculating required light source power by using a light-growth rate-photosynthetic efficiency model. The water resource circulation and purification module comprises:

4. The high-efficiency carbon reduction and fixation system based on the integrated energy utilization of a thermal power plant factory according to claim 1, characterized in that, ​ A biofilm treatment unit connected to the power plant wastewater end for constructing a biofilm reactor, inoculating microbial communities, and degrading organic pollutants in wastewater through microbial metabolism by controlling dissolved oxygen concentration, temperature, and pH value; A reverse osmosis membrane treatment unit connected to the biofilm treatment unit, using multi-stage reverse osmosis membrane modules, calculating purification efficiency indicators based on a purification efficiency-treatment cost model; based on the difference between the actual purification efficiency indicators and the preset threshold, adjusting the pump head, flow rate, or cleaning the reverse osmosis membrane to improve the purification efficiency, so that the purified water meets the standard defined by the plant factory preset threshold.

5. The high-efficiency carbon reduction and fixation system based on the integrated energy utilization of a thermal power plant factory according to claim 4, characterized in that, The purification efficiency-treatment cost model is: ； wherein, is the purification efficiency index, used to reflect the performance of water purification; is the density of water, is the acceleration of gravity; is the head of the high-pressure pump in the reverse osmosis membrane treatment unit, determined according to the system pressure requirement; is the flow of water; is the efficiency of the pump, which can be determined according to the type and technical parameters of the pump; is the pressure difference on both sides of the reverse osmosis membrane, determined according to the operating pressure requirement of the membrane; is the concentration of wastewater pollutants entering the purification process, is the concentration of pollutants in the purified water; is the volume of the entire bio-membrane reaction tank, calculated by the design size.

6. The high-efficiency carbon reduction and fixation system based on the integrated energy utilization of a thermal power plant factory according to claim 5, characterized in that, The flue gas carbon capture supply module includes: A flue gas carbon capture unit connected to the power plant flue gas end, using high polymer membrane separation technology, capturing and purifying carbon dioxide in the power plant flue gas through a silicate molecular sieve membrane, and using the regular pore structure of the molecular sieve and automatic valves and pressure control equipment; A precise supply unit connected to the flue gas carbon capture unit, determining the carbon demand flow of each area of the plant factory based on a carbon supply-photosynthetic rate model, and supplying each area of the plant factory based on the carbon demand flow.

Images