Photo-thermal-based energy collaborative management system and application thereof in chemical industry
By designing a collaborative energy management system based on light and heat, the problem of difficult to meet the thermal demand in chemical reactions is solved, and the efficient utilization of photothermal energy is achieved, carbon emissions and energy costs are reduced, and energy efficiency is improved.
Patent Information
- Application Number
- CN202411431587.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-14
- Publication Date
- 2025-03-11
AI Technical Summary
Thermal demand is common in chemical reactions, but the existing heating methods are costly and have heavy environmental burdens, and it is difficult to achieve fine control, resulting in low energy utilization efficiency.
Design an energy collaborative management system based on light and heat, including solar heat collecting pipes, material buffering units, reaction units, heat recovery systems and load balancing control systems. Through intelligent data analysis and control algorithms, the power distribution of solar energy and stable energy is optimized to achieve efficient and stable operation of the system.
It has achieved efficient utilization of photothermal energy in chemical reactions, reduced load and expenses of traditional electrical energy applications, reduced carbon emissions and carbon tax costs, and improved energy efficiency and the utilization ratio of renewable green energy.
Smart Images
Figure CN119597065A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to a photothermal-based energy collaborative management system and its application in chemical industry Background Art
[0002] Energy heating plays an important role in chemical reactions, including accelerating reaction rates, promoting equilibrium movement, reducing raw material viscosity and improving production efficiency. There are many common heating methods, and electricity and its various modes are particularly prominent. Thermal power generation accounts for the largest proportion of power generation in my country, which has the problems of high cost and heavy environmental burden.
[0003] The efficient use of clean energy, especially solar energy, has lower carbon emissions and is an important direction for industrial production, including chemical, electric power, and nonferrous metals. Among them, the heating system is one of the important technical approaches for the industrial application of clean energy. Primary energy conversion devices represented by solar vacuum collector tubes have great advantages. Its solar absorption rate is often greater than 95%. Combined with the various energy dissipations of its thermal system, the systematic utilization efficiency of sunlight can reach more than 50%, which has obvious advantages over the photovoltaic efficiency of 20%+. However, there are no reports on the direct use of solar energy as a heat source for chemical reactions.
[0004] At the same time, in industrial production, especially in the chemical industry, heat demand is ubiquitous and indispensable, especially for endothermic reactions or reactions with high requirements for reaction temperature conditions. The early preheating management, heat management during the reaction, and heat recovery after the reaction all need to be carefully controlled, and the heat energy consumption in the process is also large.
[0005] In summary, applying the energy collected from the photothermal process in chemical production has great application prospects and can save more fossil energy consumption based on the existing energy consumption. Summary of the invention
[0006] In order to solve the shortcomings of the existing technology, a more perfect utilization process is now provided.
[0007] An energy collaborative management system based on photothermal energy includes the following parts:
[0008] The energy transfer equipment subsystem is composed of a primary heating unit, a secondary heating unit, a material buffer unit, and a reaction unit. The primary heating unit is a solar heat collecting tube, which can absorb solar radiation to the maximum extent by integrating with the radiation sensing unit. The solar heat collecting tube heats the reaction materials to a certain temperature while absorbing heat. The reaction materials are heated by the secondary heating unit after being buffered or mixed in the material buffer unit, and finally enter the reaction unit to participate in the reaction;
[0009] The energy interaction subsystem consists of a heat recovery system for recovering the heat absorbed / released during the reaction to the material buffer unit;
[0010] The energy monitoring and control subsystem is composed of a load balancing control system, including a temperature and pressure regulating module, a process temperature sensor, an outlet temperature sensor, an irradiation sensing unit, etc. The irradiation sensing unit obtains the change in solar radiation and monitors and predicts the solar radiation captured by the solar collector. The process temperature sensor and the outlet temperature sensor monitor the temperature of the reaction system in real time, and feed the data back to the temperature and pressure regulating module to automatically adjust the system temperature and pressure.
[0011] The material buffer unit is equipped with a temperature sensor. When the temperature of the reaction materials after mixing is lower than the reaction temperature, the secondary heating unit, that is, the traditional heating method, is started; when the temperature of the reaction materials is higher than the reaction temperature, the secondary heating unit is not started, and the flow controller automatically increases the flow rate to speed up the flow rate of the reaction materials to adapt to the required temperature of the reaction.
[0012] A temperature sensor, a pressure sensor and a temperature and pressure regulating module are installed in front of the reaction unit. The temperature and pressure of the reaction system are monitored in real time by the temperature and pressure sensors, and the data are fed back to the temperature and pressure regulating module to automatically adjust the system temperature and pressure.
[0013] Furthermore, the primary heating unit is a vacuum tube solar heater, a flat plate solar heater, a dish focusing heater or a lens focusing heater.
[0014] Furthermore, it comprises a pretreatment unit, which is arranged at the material inlet and is used for performing pretreatment operations such as filtering, separating, vaporizing, etc. on reaction materials from different sources.
[0015] Furthermore, the heat interaction subsystem adopts heat exchange technology to react to heat interaction and transfer it to the material buffer unit, and the energy loss during the interaction is lower than a preset threshold.
[0016] Furthermore, a temperature sensor is installed in the material buffer unit. When the temperature of the reaction materials after mixing is lower than the reaction temperature, the secondary heating unit, that is, the traditional electric heating method, is started; when the temperature of the reaction materials is higher than the reaction temperature, the secondary heating unit is not started, and the flow controller automatically increases the flow rate to speed up the flow rate of the reaction materials to adapt to the required temperature of the reaction.
[0017] Furthermore, the pump valve automatic adjustment control subsystem is composed of a flow sensor and a flow control valve. The flow sensor monitors the material flow, and the flow control valve adjusts the material flow rate according to the feedback signal of the temperature sensor.
[0018] Furthermore, the secondary heating unit, that is, the traditional heating method includes electric heating, coal-fired oil-fired gas heating, and conventional high-temperature heat exchange method.
[0019] An application of a photothermal-based energy collaborative management system in chemical industry. The system combines the reactors and systems in the chemical process steps by connecting chemical reaction units in series, parallel, or in series-parallel combination. Solar collectors provide thermal energy for reaction raw materials. Data supported by sensor units and software control algorithms are used to predict changes in solar radiation and control heating power regulation by a stable energy source. A load balancing control system is set in the system, and a control algorithm is used to ensure that the outlet temperature of the fluid material reaches the predetermined reaction condition after load balancing.
[0020] The system's control center has intelligent data analysis and processing capabilities. It can automatically optimize and adjust the power distribution ratio of solar collectors and stable energy, as well as the working parameters of each pump, valve and heating unit based on real-time collected irradiation, temperature, pressure, flow and other data, so as to achieve efficient and stable operation of the system and optimal energy utilization efficiency.
[0021] Beneficial effects:
[0022] In low-temperature and normal-pressure reactions, the reactor can be directly connected, and the temperature can be adjusted by material flow; in high-temperature reactions, the material temperature can be increased by a secondary heater. Reduce the load and cost expenditure of traditional electricity applications, and reduce corporate costs. The present invention can significantly reduce carbon emissions and carbon tax costs, help achieve carbon peak and carbon neutrality goals, and increase the utilization ratio of renewable green solar energy and energy efficiency. Converting unstable solar energy into a stable energy system can serve as the infrastructure of a green and efficient energy utilization system for solar chemical industry, can support a variety of reactions, has strong universality, and has important significance and application value. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] Figure 1 It is a management process control diagram for the application of this energy management system in chemical preparation.
[0024] Figure 2 It is a schematic diagram of each module;
[0025] Figure 3 It is the application of this energy management system in low temperature and normal pressure reaction;
[0026] Figure 4 It is the application of this energy management system in high temperature and high pressure reactions. DETAILED DESCRIPTION
[0027] In order to deepen the understanding of the present invention, the present invention will be further described in detail below in conjunction with examples. The examples are only used to explain the present invention and do not constitute a limitation on the protection scope of the present invention.
[0028] Figure 1This is a process flow chart of the overall energy collaborative management system, showing the situation of two materials in part, but it can also be a single or more material input.
[0029] Figure 2 It is a functional display of multiple optional modules. It is worth noting that Figure 2 The order shown in the figure does not represent the order and number of connections in actual application. The number of modules may vary for some special chemical reaction processes. Some modules may also be omitted.
[0030] Figure 2 The A module refers to the solar thermal module, which can generally be a vacuum tube solar heater, a flat-plate solar heater, a dish-type focusing heater or a lens focusing heater. Its main function is to convert light into heat, which is also the primary heating unit. Figure 2 The B module refers to the buffer boost area, where a booster pump or similar accessories can be used for liquids, and a compressor or similar accessories can be used for gases. The C module refers to the traditional heating module, which usually has good stability and controllability, that is, the secondary heating unit. This module uses stable energy to provide appropriate heat, such as electric heaters, combustion heaters, and high-temperature heat exchangers to regulate the heat in the high-temperature section, thereby making up for the defect that although light heat has the advantage of efficiency and cleaning, it has poor stability. Figure 2 The D module refers to the reaction area, the E module refers to the pressure control module, and the F module refers to the control center.
[0031] Figure 3 It is the application of this energy management system in low temperature and normal pressure reactions. Figure 4 It is the application of this energy management system in high temperature and high pressure reactions.
[0032] Example 1: Industrial ammonia synthesis reaction
[0033] The reaction materials are N2 and H2, the reaction temperature is 400-500℃, and the reaction pressure is 20-50MPa.
[0034] Specific implementation steps:
[0035] 1. The two groups of reaction raw material atmospheres of N2 and H2 pass through the dish / concentrating solar collector in a certain proportion and at a certain flow rate. The temperature of the solar collector reaches its critical value (generally 250°C) under the irradiation of sunlight (or simulated light source);
[0036] 2. After being heated to a certain temperature, the two groups of reaction raw gases, N2 and H2, enter the material buffer for full mixing, and the material pressure is increased to the reaction pressure through the compressor (and the temperature will also be increased accordingly). The temperature sensor in the material buffer detects that the mixing temperature is lower than the reaction set temperature, and the signal is fed back to the secondary heating device to start the secondary heating device;
[0037] 3. The mixed gas is heated by the secondary heating device, and the temperature and pressure of the mixed gas are monitored in real time by the temperature sensor and pressure sensor. The mixed gas reaches the preset reaction temperature and pressure through temperature regulation and pressure regulation;
[0038] 4. The mixed gas enters the reaction unit for reaction. Since the reaction is reversible and releases heat in the forward direction, the heat released by the reaction can be recovered into the material buffer through the heat recovery system and used for heating the raw material atmosphere, which can also help promote the synthesis of ammonia.
[0039] Example 2: Ethyl acetate synthesis reaction
[0040] The reaction raw materials are C2H5OH and CH3COOH, the reaction temperature is 120-125°C, and the reaction pressure is 1MPa.
[0041] 1. The two reaction liquid raw materials C2H5OH and CH3COOH pass through the solar collector tube at a certain ratio and at a certain flow rate. The temperature of the solar collector tube reaches its critical value (generally 250°C) under the irradiation of sunlight (or simulated light source);
[0042] 2. After being heated to a certain temperature, the two reaction liquid raw materials C2H5OH and CH3COOH enter the material buffer for full mixing. The temperature sensor in the material buffer detects that the mixed temperature is higher than the reaction set temperature, so there is no need to start the secondary heating device, and they can directly enter the reaction unit to participate in the reaction;
[0043] 3. In order to control the reaction temperature between 120℃ and 125℃, the temperature sensor is used to monitor the temperature of the raw materials in the material buffer in real time and feedback the relevant signal. After receiving the signal, the flow controller increases the liquid flow rate to reduce the temperature of the reaction material, thereby controlling the reaction temperature in the range of 120-125℃.
[0044] As a further improvement, the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.
Claims
1. A photothermal energy collaborative management system, characterized in that: Includes the following parts: The energy transfer equipment subsystem is composed of a primary heating unit, a secondary heating unit, a material buffer unit, and a reaction unit. The primary heating unit is a solar heat collecting tube, which can absorb solar radiation to the maximum extent by integrating with the radiation sensing unit. The solar heat collecting tube heats the reaction materials to a certain temperature while absorbing heat. The reaction materials are heated by the secondary heating unit after being buffered or mixed in the material buffer unit, and finally enter the reaction unit to participate in the reaction; The energy interaction subsystem consists of a heat interaction system for interacting the heat released / absorbed during the reaction with the material buffer unit; The energy monitoring and control subsystem is composed of a load balancing control system, including a temperature and pressure regulating module, a process temperature sensor, an outlet temperature sensor, an irradiation sensing unit, etc. The irradiation sensing unit obtains the change in solar radiation and monitors and predicts the solar radiation captured by the solar collector. The process temperature sensor and the outlet temperature sensor monitor the temperature of the reaction system in real time, and feed the data back to the temperature and pressure regulating module to automatically adjust the system temperature and pressure.
2. The photothermal energy collaborative management system according to claim 1 is characterized in that: The material buffer unit is equipped with a temperature sensor. When the temperature of the reaction materials after mixing is lower than the reaction temperature, the secondary heating unit, that is, the traditional heating method, is started; when the temperature of the reaction materials is higher than the reaction temperature, the secondary heating unit is not started, and the flow controller automatically increases the flow rate to speed up the flow rate of the reaction materials to adapt to the required temperature of the reaction.
3. The photothermal energy collaborative management system according to claim 1 is characterized in that: A temperature sensor, a pressure sensor and a temperature and pressure regulating module are installed in front of the reaction unit. The temperature and pressure of the reaction system are monitored in real time by the temperature and pressure sensors, and the data are fed back to the temperature and pressure regulating module to automatically adjust the system temperature and pressure.
4. The photothermal energy collaborative management system according to claim 1 is characterized in that: The primary heating unit is a vacuum tube solar heater, a flat plate solar heater, a dish focusing heater or a lens focusing heater.
5. The photothermal-based energy collaborative management system according to claim 1 is characterized in that: It includes a pretreatment unit, which is arranged at the material inlet and is used for performing pretreatment operations such as filtering, separating, and vaporizing reaction materials from different sources.
6. The photothermal-based energy collaborative management system according to claim 1, characterized in that: The heat interaction system uses heat exchange technology to react to heat interaction and transfer it to the material buffer unit, and the energy loss during the interaction is lower than the preset threshold.
7. The photothermal-based energy collaborative management system according to claim 1 is characterized in that: The material buffer unit is equipped with a temperature sensor. When the temperature of the reaction materials after mixing is lower than the reaction temperature, the secondary heating unit, that is, the traditional heating method, is started; when the temperature of the reaction materials is higher than the reaction temperature, the secondary heating unit is not started, and the flow controller automatically increases the flow rate to speed up the flow rate of the reaction materials to adapt to the required temperature of the reaction.
8. The photothermal-based energy collaborative management system according to claim 1 is characterized in that: The pump valve automatic adjustment control subsystem is composed of a flow sensor and a flow control valve. The flow sensor monitors the material flow, and the flow control valve adjusts the material flow rate according to the feedback signal from the temperature sensor.
9. Application of a photothermal-based energy collaborative management system in chemical industry, characterized in that: The system combines the reactors and systems in the chemical process steps by connecting chemical reaction units in series, parallel, and series-parallel. Solar collectors provide thermal energy for the reaction raw materials. The data and software control algorithms supported by the sensor units predict changes in solar radiation and control the heating power adjustment by a stable energy source. A load balancing control system is set up in the system to ensure that the outlet temperature of the fluid material reaches the predetermined reaction condition after load balancing through the control algorithm.
10. The application of a photothermal-based energy collaborative management system in chemical industry according to claim 9, characterized in that: The system's control center has intelligent data analysis and processing capabilities, and can automatically adjust the power distribution ratio between solar collectors and stable energy, as well as the working parameters of each pump, valve and heating unit based on real-time collected irradiation, temperature, pressure, flow and other data.