A solar-heated kitchen waste gasification hydrogen production copper powder reduction system and method

Abstract

The invention relates to the technical field of waste resource utilization, and discloses a solar energy-heated kitchen waste gasification hydrogen production copper powder reduction system and method. In the system, a coupling reaction device comprises a supercritical water gasification module and a preheating pipeline supercritical hydrothermal synthesis component which are sequentially arranged from outside to inside; the outer wall of the supercritical water gasification module is provided with a solar energy heating module; the preheating pipeline supercritical hydrothermal synthesis component comprises a supercritical hydrothermal synthesis module and a preheating pipeline which are sequentially arranged from bottom to top, and the supercritical hydrothermal synthesis module and the preheating pipeline are in an integrated tubular structure; a palladium membrane is provided between the supercritical water gasification module and the supercritical hydrothermal synthesis module, and the modules are connected through the palladium membrane; the invention realizes the preparation of high-purity ultrafine copper powder by directly participating in supercritical hydrothermal synthesis to prepare ultrafine copper powder by arranging a palladium membrane between the supercritical water gasification module and the supercritical hydrothermal synthesis module for separating pure hydrogen.

Description

Technical Field

[0001] The invention relates to the technical field of waste resource utilization, and in particular to a solar-heated kitchen waste gasification hydrogen production copper powder reduction system and method. Background Art

[0002] In recent years, with the increasing trend of compactness and complexity of electronic devices, the demand for high-performance conductive materials has shown a growing trend. Among them, ultrafine copper powder has been widely used in many fields due to its excellent conductivity and efficiency. Especially in the fields of printed circuit boards, conductive inks and semiconductor components, the application of ultrafine copper powder not only improves the performance of products, but also promotes the progress of related industries. In addition, ultrafine copper powder is also increasingly used in the automotive industry due to its excellent thermal conductivity and electrical conductivity, further promoting the development of the ultrafine copper powder market. Copper's high conductivity also makes it an ideal material for solar panels, wind turbines and other renewable energy technologies. With the increasing global attention to sustainable energy solutions, the demand for ultrafine copper powder is also growing. These trends indicate that the application areas of ultrafine copper powder will be more extensive, and at the same time, higher requirements are placed on the purity and output of ultrafine copper powder.

[0003] On the other hand, the problem of food waste treatment is becoming increasingly prominent. Food waste mainly comes from by-products produced by fruits, grains, meat and fish, which are rich in carbohydrates, lignin, protein, fat and organic acids. If it is not treated in a timely and effective manner, food waste is easy to emit odors and breed bacteria, which will aggravate environmental pollution and pose a serious threat to ecological balance and public health. At present, the traditional food waste treatment technology is mainly incineration. Although incineration can effectively reduce the volume of garbage, harmful gases will be produced during the incineration process, polluting the air and aggravating the problem of global warming. In addition, the water content of food waste is as high as 70%-95%, which greatly reduces the efficiency of combustion. At the same time, a large amount of garbage leachate will be produced during the stacking process, causing serious pollution to the soil and water. Therefore, it is urgent to explore new food waste treatment methods to solve the problems existing in the existing technology. Summary of the invention

[0004] In order to overcome the defects of the above-mentioned prior art, the purpose of the present invention is to provide a solar-heated kitchen waste gasification hydrogen production copper powder reduction system and method, so as to solve the technical problem of how to reduce copper powder by processing kitchen waste in the prior art.

[0005] The present invention is achieved through the following technical solutions:

[0006] In a first aspect, the present invention provides a solar-heated kitchen waste gasification hydrogen production copper powder reduction system, comprising a slurry output pipeline, a water preheating output unit, a copper solution output pipeline, a coupling reaction device, and a copper powder separation unit;

[0007] The coupled reaction device comprises a supercritical water gasification module and a preheating pipeline supercritical water thermal synthesis component which are sequentially arranged from outside to inside; the outer side wall of the supercritical water gasification module is provided with a solar heating module;

[0008] The preheating pipeline supercritical hydrothermal synthesis assembly comprises a supercritical hydrothermal synthesis module and a preheating pipeline arranged in sequence from bottom to top, and the supercritical hydrothermal synthesis module and the preheating pipeline are an integrated tubular structure;

[0009] The output ends of the slurry output pipeline and the water preheating output unit are respectively connected to the input end of the supercritical water gasification module; a palladium membrane is provided between the supercritical water gasification module and the supercritical hydrothermal synthesis module, and the modules are connected through the palladium membrane;

[0010] The input end of the copper solution output pipeline is used to input a copper precursor solution and a modifier, the output end of the copper solution output pipeline is connected to the input end of a preheating pipeline, the output end of the preheating pipeline is connected to the input end of a supercritical hydrothermal synthesis module, and the output end of the supercritical hydrothermal synthesis module is connected to the input end of a copper powder separation unit.

[0011] Preferably, a slurry pump is provided on the slurry output pipeline for inputting slurry;

[0012] The water preheating output unit includes a water output pipeline and a first solar heater; a water pump is arranged on the water output pipeline, and the output end of the water output pipeline is connected to the input end of the supercritical water gasification module after passing through the first solar heater.

[0013] Preferably, the solar heating module comprises a plurality of second solar heaters, and the plurality of second solar heaters are sequentially arranged on the outer side wall of the supercritical water gasification module.

[0014] Preferably, the copper solution output pipeline includes a copper precursor solution output pipeline and a modifier output pipeline;

[0015] The input end of the copper precursor solution output pipeline is provided with a precursor solution pump for inputting the copper precursor solution; the input end of the modifier output pipeline is provided with a modifier pump for inputting the modifier;

[0016] The output ends of the copper precursor solution output pipeline and the modifier output pipeline are respectively connected to the input end of the preheating pipeline.

[0017] Preferably, the copper powder separation unit comprises a first cooler and a liquid-solid separator;

[0018] The input end of the first cooler is connected to the output end of the supercritical hydrothermal synthesis module, and the output end of the first cooler is connected to the input end of the liquid-solid separator.

[0019] Preferably, the supercritical water gasification module also includes a first output end and a second output end, wherein the first output end is located at the upper position of the supercritical water gasification module, and the first output end is connected to a gas-liquid separation unit for gas-liquid separation; the second output end is located at the lower position of the supercritical water gasification module, and the second output end is connected to a slag discharge unit for ash separation.

[0020] Further, the gas-liquid separation unit includes a second cooler, a gas-liquid separator and a water tank;

[0021] The input end of the second cooler is connected to the first output end of the supercritical water gasification module; the output end of the second cooler is connected to the input end of the gas-liquid separator, and the liquid output end of the gas-liquid separator is connected to the water tank.

[0022] Furthermore, it also includes a multi-directional heat exchanger; the multi-directional heat exchanger is arranged between the second cooler and the first output end of the supercritical water gasification module, and the output end of the copper solution output pipeline is connected to the input end of the preheating pipeline after passing through the multi-directional heat exchanger.

[0023] Furthermore, the slag discharge unit includes a third cooler and a lock hopper;

[0024] The input end of the third cooler is connected to the second output end of the supercritical water gasification module, and the output end of the third cooler is connected to the input end of the lock hopper; the lock hopper is also provided with a water injection pipeline and a slag discharge pipeline; the water injection pipeline is provided with a water injection ball valve, and the slag discharge pipeline is provided with a slag discharge needle valve.

[0025] In a second aspect, the present invention further provides a method for using a solar-heated kitchen waste gasification hydrogen production and copper powder reduction system. Based on the above-mentioned solar-heated kitchen waste gasification hydrogen production and copper powder reduction system, the method for using the system comprises the following steps:

[0026] The water and the kitchen waste slurry are respectively input into the supercritical water gasification module of the outermost layer of the coupling reaction device through the water preheating output unit and the slurry output pipeline, and the supercritical water gasification module is heated by the solar heating module, and the heat is transferred to the preheating pipeline; the water and the kitchen waste slurry in the supercritical water gasification module are heated to generate gasification products, and the gasification products are separated into pure hydrogen through the palladium membrane, and the pure hydrogen is used as a reducing agent to enter the supercritical hydrothermal synthesis module;

[0027] The copper precursor solution and the modifier are respectively input into the preheating pipe through the copper solution output pipeline, and flow into the supercritical hydrothermal synthesis module after preheating. The products are obtained by reduction reaction between pure hydrogen and the copper precursor solution and the modifier and output to the copper powder separation unit for separation to obtain copper powder.

[0028] Compared with the prior art, the present invention has the following beneficial technical effects:

[0029] The present invention provides a solar-heated kitchen waste gasification hydrogen production and copper powder reduction system. The coupled reaction device integrates a supercritical water gasification module and a supercritical hydrothermal synthesis module through a sleeve structure, and a section of pipeline is reserved for preheating the material entering the hydrothermal synthesis module. A palladium membrane is arranged between the supercritical water gasification module and the supercritical hydrothermal synthesis module to separate pure hydrogen into a supercritical hydrothermal synthesis reactor. The pure hydrogen produced by supercritical water gasification directly participates in the supercritical hydrothermal synthesis to prepare ultrafine copper powder, replacing expensive chemical reducing agents, avoiding the introduction of impurities, and realizing the preparation of high-purity ultrafine copper powder. This system converts kitchen waste into hydrogen-rich synthesis gas through supercritical water gasification, thereby realizing the resource processing of kitchen waste.

[0030] Furthermore, the slurry pump provided on the slurry output pipeline can effectively control the input flow and pressure of the slurry, ensuring that the slurry enters the supercritical water gasification module in a stable and controllable manner. The water in the output pipeline of the slurry is preheated by the first solar heater, making full use of the renewable energy of solar energy, which not only reduces the dependence on traditional energy, but also reduces energy consumption and operating costs. When the preheated water enters the supercritical water gasification module, it can reach the required reaction conditions more quickly, thereby improving the gasification efficiency.

[0031] Furthermore, the second solar heater is directly attached to the outer wall of the supercritical water vaporization module, which can more effectively transfer the collected solar energy to the medium in the vaporization module, reduce the loss in the heat transfer process, and improve the energy conversion efficiency. Multiple second solar heaters are arranged in sequence to ensure that all parts of the supercritical water vaporization module can be heated evenly.

[0032] Furthermore, the precursor solution pump and the modifier pump are responsible for inputting the copper precursor solution and the modifier respectively, and can accurately control the respective input flow rates. The copper precursor solution and the modifier enter the preheating pipeline through their respective output pipelines, and preliminary mixing can be achieved during the preheating process.

[0033] Furthermore, the first cooler is located after the output end of the supercritical hydrothermal synthesis module, which can quickly reduce the temperature of the reaction product, help stabilize the physical and chemical properties of the product, and prevent further reaction or decomposition at high temperature, thereby ensuring the quality and stability of the copper powder. The cooled reaction product enters the liquid-solid separator, where the liquid and solid components are effectively separated. Liquid-solid separation is the key to the copper powder production process, ensuring the purity and recovery rate of the copper powder, while reducing the complexity and cost of subsequent processing.

[0034] Furthermore, the first output end is located at the upper part of the supercritical water gasification module, and can collect the high-temperature and high-pressure gas generated during the gasification process. Through the connected gas-liquid separation unit, the gas and liquid can be efficiently separated to ensure the continuity and stability of subsequent processing. The second output end is located at the lower part of the supercritical water gasification module, and can collect the solid residue generated during the gasification process. Through the connected slag discharge unit, ash and residue can be discharged from the system regularly or continuously to prevent them from accumulating in the gasification module and affecting the gasification efficiency.

[0035] Furthermore, the second cooler is located after the first output of the supercritical water gasification module, which can quickly reduce the temperature of the high-temperature and high-pressure gas. The cooled gas enters the gas-liquid separator, where the gas and liquid components are effectively separated. The high efficiency of the gas-liquid separator ensures the purity and quality of the water. The liquid output of the gas-liquid separator is connected to the water tank, so that the separated liquid can be collected and stored centrally.

[0036] Furthermore, the multi-directional heat exchanger can recover the heat in the high-temperature and high-pressure gas before the second cooler, and transfer the heat to the copper solution in the copper solution output pipeline or the fluid that needs to be preheated, which not only improves the energy utilization efficiency, but also helps to reduce energy consumption and reduce production costs.

[0037] Furthermore, the third cooler is located after the second output end of the supercritical water gasification module, which can quickly reduce the temperature of the ash, help stabilize the physical and chemical properties of the ash, and prevent it from further reacting or changing at high temperatures, thereby ensuring the quality and stability of the ash. The cooled ash enters the lock hopper, and the design of the lock hopper can ensure that the ash is effectively collected and stored. The setting of the water injection pipeline can further help the cooling and solidification of the ash, while reducing the flying and pollution of the ash during the discharge process. The slag discharge needle valve set on the slag discharge pipeline can control the discharge speed and amount of the ash, ensuring the safety and stability of the discharge process.

[0038] The present invention also provides a method for using a solar-heated kitchen waste gasification hydrogen production copper powder reduction system, which uses kitchen waste as a raw material and converts it into valuable hydrogen through a gasification process, thereby realizing resource utilization of kitchen waste. Hydrogen, as a reducing agent, participates in the reduction reaction of a copper precursor to generate high-value-added copper powder, further improving resource utilization efficiency. The present invention uses a solar heating module to heat a supercritical water gasification module, and uses renewable energy solar energy as a heat source, thereby reducing fossil energy consumption and greenhouse gas emissions. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] Figure 1 This is a schematic diagram of the structure of the solar-heated kitchen waste gasification hydrogen production and copper powder reduction system in Example 1 of the present invention;

[0040] Figure 2 This is a schematic diagram of the structure of the solar energy heating kitchen waste gasification hydrogen production copper powder reduction system in Example 2 of the present invention;

[0041] In the figure: 1. slurry pump; 2. water pump; 3. first solar heater; 4. precursor solution pump; 5. modifier pump; 6. coupling reaction device; 7. supercritical water gasification module; 8. palladium membrane; 9. supercritical hydrothermal synthesis module; 10. preheating pipeline; 11. second solar heater; 12. first cooler; 13. liquid-solid separator; 14. second cooler; 15. gas-liquid separator; 16. water tank; 17. third cooler; 18. lock hopper; 19. multi-directional heat exchanger. DETAILED DESCRIPTION

[0042] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0043] The purpose of the present invention is to provide a solar-heated kitchen waste gasification hydrogen production copper powder reduction system and method, so as to solve the technical problem of how to reduce copper powder by processing kitchen waste in the prior art.

[0044] The present invention is further described in detail below in conjunction with the accompanying drawings:

[0045] Example 1

[0046] See also Figure 1In this embodiment 1, a solar-heated kitchen waste gasification hydrogen production copper powder reduction system is provided, comprising a slurry output pipeline, a water preheating output unit, a copper solution output pipeline, a coupling reaction device 6 and a copper powder separation unit; the coupling reaction device 6 comprises a supercritical water gasification module 7 and a preheating pipeline supercritical hydrothermal synthesis component which are sequentially arranged from the outside to the inside; the outer wall of the supercritical water gasification module 7 is provided with a solar heating module; the preheating pipeline supercritical hydrothermal synthesis component comprises a supercritical hydrothermal synthesis module 9 and a preheating pipeline 10 which are sequentially arranged from bottom to top, and the supercritical hydrothermal synthesis module 9 and the preheating pipeline 10 are in an integrated tubular structure; The output ends of the slurry output pipeline and the water preheating output unit are respectively connected to the input end of the supercritical water gasification module 7; a palladium membrane 8 is provided between the supercritical water gasification module 7 and the supercritical hydrothermal synthesis module 9, and they are connected through the palladium membrane 8; the input end of the copper solution output pipeline is used to input the copper precursor solution and the modifier, the output end of the copper solution output pipeline is connected to the input end of the preheating pipeline 10, the output end of the preheating pipeline 10 is connected to the input end of the supercritical hydrothermal synthesis module 9, and the output end of the supercritical hydrothermal synthesis module 9 is connected to the input end of the copper powder separation unit.

[0047] Specifically, a slurry pump 1 is provided on the slurry output pipeline for inputting slurry; the water preheating output unit includes a water output pipeline and a first solar heater 3; a water pump 2 is provided on the water output pipeline, and the output end of the water output pipeline is connected to the input end of the supercritical water gasification module 7 after passing through the first solar heater 3.

[0048] In this embodiment, the slurry output pipeline transports the food waste slurry from the storage or pretreatment unit to the supercritical water gasification module 7. The slurry pump 1 is installed on the slurry output pipeline to provide the necessary pressure to overcome the pipeline resistance and the inlet pressure of the supercritical water gasification module 7 to ensure that the slurry can be smoothly input.

[0049] The water preheating output unit includes a water output pipeline and a first solar heater 3, which is used to heat water and preheat it to a temperature close to or reaching the supercritical state. The water pump 2 is installed on the water output pipeline to provide the pressure required for the water flow. The first solar heater 3 uses solar energy to heat the water in the water output pipeline to increase the water temperature to a preset value. The supercritical water gasification module 7 receives the preheated water and slurry, and causes the food waste slurry to undergo a gasification reaction by heating it to a supercritical condition.

[0050] Specifically, the solar heating module includes a plurality of second solar heaters 11 , and the plurality of second solar heaters 11 are sequentially arranged on the outer side wall of the supercritical water gasification module 7 .

[0051] In this embodiment, a plurality of second solar heaters 11 are sequentially installed on the outer side wall of the supercritical water vaporization module 7. They use solar energy as a heat source and transfer heat to the supercritical water vaporization module 7 by heat conduction or heat radiation.

[0052] Specifically, the copper solution output pipeline includes a copper precursor solution output pipeline and a modifier output pipeline; the input end of the copper precursor solution output pipeline is provided with a precursor solution pump 4 for inputting the copper precursor solution; the input end of the modifier output pipeline is provided with a modifier pump 5 for inputting the modifier; the output ends of the copper precursor solution output pipeline and the modifier output pipeline are respectively connected to the input end of the preheating pipe 10.

[0053] In this embodiment, the copper precursor solution output pipeline transports the copper precursor solution from the storage unit to the preheating pipeline 10. The precursor solution pump 4 is installed at the input end of the copper precursor solution output pipeline to provide the necessary pressure to overcome the pipeline resistance and the inlet pressure of the preheating pipeline 10, ensuring that the copper precursor solution can be smoothly input.

[0054] The modifier output pipeline delivers the modifier from the storage unit to the preheating pipeline 10. The modifier pump 5 is installed at the input end of the modifier output pipeline, and is also used to provide the necessary pressure to ensure that the modifier can be smoothly input.

[0055] Specifically, the copper powder separation unit includes a first cooler 12 and a liquid-solid separator 13 ; the input end of the first cooler 12 is connected to the output end of the supercritical hydrothermal synthesis module 9 , and the output end of the first cooler 12 is connected to the input end of the liquid-solid separator 13 .

[0056] In this embodiment, the input end of the first cooler 12 is connected to the output end of the supercritical hydrothermal synthesis module 9, and is used to receive and cool the high-temperature reaction mixture flowing out of the module.

[0057] The input end of the liquid-solid separator 13 is connected to the output end of the first cooler 12, and is used to perform liquid-solid separation on the cooled reaction mixture to obtain a copper powder product.

[0058] Specifically, the supercritical water gasification module 7 also includes a first output end and a second output end, wherein the first output end is located at the upper position of the supercritical water gasification module 7, and the first output end is connected to a gas-liquid separation unit for gas-liquid separation; the second output end is located at the lower position of the supercritical water gasification module 7, and the second output end is connected to a slag discharge unit for ash separation.

[0059] In this embodiment, the first output end of the supercritical water gasification module 7 is located at the upper part of the supercritical water gasification module 7, and is mainly used to output the high-temperature and high-pressure gas mixture generated by the gasification reaction. The output end is connected to a gas-liquid separation unit for effectively separating the gas and liquid components.

[0060] The second output end of the supercritical water gasification module 7 is located at the lower part of the supercritical water gasification module 7, and is mainly used to discharge solid residues such as ash generated during the gasification reaction. The output end is connected to a slag discharge unit for efficient separation and treatment of ash.

[0061] The gas-liquid separation unit includes a second cooler 14, a gas-liquid separator 15 and a water tank 16;

[0062] The input end of the second cooler 14 is connected to the first output end of the supercritical water gasification module 7 ; the output end of the second cooler 14 is connected to the input end of the gas-liquid separator 15 , and the liquid output end of the gas-liquid separator 15 is connected to the water tank 16 .

[0063] In this embodiment, the input end of the second cooler 14 is connected to the first output end of the supercritical water gasification module 7, which is used to receive and cool the high-temperature and high-pressure gas mixture flowing out of the module, which helps to reduce the temperature of the gas mixture and make it more suitable for subsequent gas-liquid separation operations.

[0064] The input end of the gas-liquid separator 15 is connected to the output end of the second cooler 14, and is used to effectively separate the gas and liquid components in the cooled gas mixture. The gas-liquid separator 15 is the core component of the gas-liquid separation unit, and its performance directly affects the purity of the product and the overall efficiency of the system. A back pressure valve is provided between the second cooler 14 and the gas-liquid separator 15 to maintain the system pressure.

[0065] Specifically, the slag discharge unit includes a third cooler 17 and a lock hopper 18;

[0066] The input end of the third cooler 17 is connected to the second output end of the supercritical water gasification module 7, and the output end of the third cooler 17 is connected to the input end of the lock hopper 18; the lock hopper 18 is also provided with a water injection pipeline and a slag discharge pipeline; the water injection pipeline is provided with a water injection ball valve, and the slag discharge pipeline is provided with a slag discharge needle valve.

[0067] In this embodiment, the third cooler 17 receives the high-temperature solid residue (such as ash) discharged from the second output end of the supercritical water gasification module 7. Through the cooling process, the temperature of the residue is reduced to a level that can be safely handled.

[0068] The lock hopper 18 is connected to the output end of the third cooler 17 and is used to temporarily store the cooled solid residue. The design of the lock hopper 18 ensures the isolation of the residue in the system to prevent it from affecting other process links.

[0069] The water injection pipeline injects water or other cooling medium into the lock hopper 18 to assist the cooling and humidification of the residue. A water injection ball valve is provided on the water injection pipeline to control the flow rate and time of water injection.

[0070] The slag discharge pipeline is used to discharge the solid residue in the lock hopper 18 out of the system. A slag discharge needle valve is provided on the slag discharge pipeline to accurately control the timing and rate of slag discharge.

[0071] The solar-heated kitchen waste gasification hydrogen production and copper powder reduction system provided in this embodiment is used in the following specific steps:

[0072] The kitchen waste slurry is driven by the slurry pump 1 and input into the supercritical water gasification module 7 of the outermost layer of the coupling reaction device 6 through the slurry output pipeline; at the same time, the water is pressurized by the water pump 2 in the water output pipeline and then heated by the first solar heater 3 before entering the supercritical water gasification module 7.

[0073] The plurality of second solar heaters 11 on the outer wall of the supercritical water gasification module 7 are turned on to heat the supercritical water gasification module 7, and the heat is transferred to the preheating pipe 10 through the inter-wall heat, the water and the kitchen waste slurry in the supercritical water gasification module 7 are heated to generate gasification products, the gasification products are separated into pure hydrogen through the palladium membrane 8, and the pure hydrogen enters the supercritical water thermal synthesis module 9 as a reducing agent;

[0074] The copper precursor solution and the modifier are driven by the precursor solution pump 4 and the modifier pump 5 through the copper precursor solution output pipeline and the modifier output pipeline respectively and input into the preheating pipe 10, and after preheating, flow into the supercritical hydrothermal synthesis module 9, and the pure hydrogen is reduced with the copper precursor solution and the modifier to obtain a product and output it to the copper powder separation unit for separation to obtain copper powder.

[0075] The remaining gasification products in the supercritical water gasification module 7 are separated into ash online, and the separated slag particles are transported to the third cooler 17 for cooling and then enter the lock hopper 18. When the lock hopper 18 is discharged, the water injection ball valve is opened, water is injected into the lock hopper 18 to a certain pressure, and then the ball valve is closed. Then the slag discharge needle valve is quickly opened. When the pressure of the entire system reaches equilibrium, the slag discharge needle valve will be closed. At this time, the lock hopper 18 is completely isolated from the supercritical water gasification module 7. Then the ball valve is opened, and the liquid-solid mixture in the lock hopper 18 is discharged.

[0076] At the same time, the gas-liquid products after ash separation enter the second cooler 14 to release heat, and the water is separated by the gas-liquid separator 15 and stored in the water tank 16.

[0077] In summary, the solar-heated kitchen waste gasification hydrogen production and copper powder reduction system provided in this embodiment integrates the supercritical water gasification module 7 and the supercritical hydrothermal synthesis module 9 through a sleeve structure, and adds a preheating pipe 10 inside; the gasification product in the supercritical water gasification module 7 is separated into pure hydrogen through a palladium membrane 8, and the pure hydrogen replaces the expensive chemical reducing agent to flow into the supercritical hydrothermal synthesis module 9 to avoid the introduction of impurities. The preheating pipe 10 preheats the material entering the supercritical hydrothermal synthesis module 9 through inter-wall heat transfer. Inter-wall heat transfer reduces energy loss, accelerates the rate at which the reaction reaches the target temperature, and improves energy efficiency.

[0078] The supercritical water gasification module 7 of the coupled reaction device 6 preheats the material entering the supercritical hydrothermal synthesis module 9 through inter-wall heat transfer, thereby reducing the energy loss of the system and improving the energy efficiency of the system. A palladium membrane 8 is provided between the supercritical water gasification module 7 and the supercritical hydrothermal synthesis module 9 in the coupled reaction device 6, which can separate pure hydrogen to replace the chemical reducing agent and enter the supercritical hydrothermal synthesis module 9, thereby avoiding the introduction of impurities and improving the purity of the ultrafine copper powder. The system converts garbage into hydrogen-rich gas, thus realizing the resource processing of kitchen waste.

[0079] Example 2

[0080] See also Figure 2 In this embodiment 2, a solar-heated kitchen waste gasification hydrogen production and copper powder reduction system is provided. On the basis of this embodiment 1, it also includes a multi-directional heat exchanger 19; the multi-directional heat exchanger 19 is arranged between the second cooler 14 and the first output end of the supercritical water gasification module 7, and the output end of the copper solution output pipeline is connected to the input end of the preheating pipe 10 after passing through the multi-directional heat exchanger 19.

[0081] In this embodiment, a multi-directional heat exchanger 19 is added to use the heat of the remaining gasification products to preheat the copper precursor solution and the modifier entering the coupling reaction device 6. The waste heat is recovered to reduce the energy loss of the system.

[0082] In summary, the solar-heated kitchen waste gasification hydrogen production and copper powder reduction system provided in this embodiment is equipped with a multi-directional heat exchanger 19, which can recover the heat in the high-temperature and high-pressure gas before the second cooler 14, and transfer the heat to the copper solution in the copper solution output pipeline or the fluid that needs to be preheated, which not only improves the energy utilization efficiency, but also helps to reduce energy consumption and reduce production costs.

[0083] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the relevant field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents, and any modifications or equivalent replacements that do not depart from the spirit and scope of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A solar-heated kitchen waste gasification hydrogen production copper powder reduction system, characterized in that: It includes a slurry output pipeline, a water preheating output unit, a copper solution output pipeline, a coupling reaction device (6) and a copper powder separation unit; The coupled reaction device (6) comprises a supercritical water gasification module (7) and a preheating pipeline supercritical water thermal synthesis component which are sequentially sleeved from the outside to the inside; the outer side wall of the supercritical water gasification module (7) is provided with a solar energy heating module; The solar heating module comprises a plurality of second solar heaters (11), wherein the plurality of second solar heaters (11) are arranged in sequence on the outer side wall of the supercritical water gasification module (7); The preheating pipeline supercritical hydrothermal synthesis component comprises a supercritical hydrothermal synthesis module (9) and a preheating pipeline (10) arranged in sequence from bottom to top, the supercritical hydrothermal synthesis module (9) and the preheating pipeline (10) are an integrated tubular structure, and the preheating pipeline (10) is used to preheat the material entering the supercritical hydrothermal synthesis module (9); The output ends of the slurry output pipeline and the water preheating output unit are respectively connected to the input end of the supercritical water gasification module (7); a palladium membrane (8) is provided between the supercritical water gasification module (7) and the supercritical hydrothermal synthesis module (9), and the palladium membrane (8) is connected to each other, and the palladium membrane (8) is used to separate pure hydrogen into the supercritical hydrothermal synthesis module (9) to directly participate in supercritical hydrothermal synthesis to prepare ultrafine copper powder; The input end of the copper solution output pipeline is used to input a copper precursor solution and a modifier, the output end of the copper solution output pipeline is connected to the input end of a preheating pipeline (10), the output end of the preheating pipeline (10) is connected to the input end of a supercritical hydrothermal synthesis module (9), and the output end of the supercritical hydrothermal synthesis module (9) is connected to the input end of a copper powder separation unit.

2. A solar-heated kitchen waste gasification hydrogen production and copper powder reduction system according to claim 1, characterized in that: The slurry output pipeline is provided with a slurry pump (1) for inputting slurry; The water preheating output unit comprises a water output pipeline and a first solar heater (3); a water pump (2) is provided on the water output pipeline, and the output end of the water output pipeline is connected to the input end of the supercritical water gasification module (7) after passing through the first solar heater (3).

3. The solar-heated kitchen waste gasification hydrogen production and copper powder reduction system according to claim 1 is characterized in that: The copper solution output pipeline includes a copper precursor solution output pipeline and a modifier output pipeline; The input end of the copper precursor solution output pipeline is provided with a precursor solution pump (4) for inputting the copper precursor solution; the input end of the modifier output pipeline is provided with a modifier pump (5) for inputting the modifier; The output ends of the copper precursor solution output pipeline and the modifier output pipeline are respectively connected to the input end of the preheating pipeline (10).

4. The solar-heated kitchen waste gasification hydrogen production and copper powder reduction system according to claim 1 is characterized in that: The copper powder separation unit comprises a first cooler (12) and a liquid-solid separator (13); The input end of the first cooler (12) is connected to the output end of the supercritical hydrothermal synthesis module (9), and the output end of the first cooler (12) is connected to the input end of the liquid-solid separator (13).

5. The solar-heated kitchen waste gasification hydrogen production and copper powder reduction system according to claim 1 is characterized in that: The supercritical water gasification module (7) further comprises a first output end and a second output end, wherein the first output end is located at an upper position of the supercritical water gasification module (7), and the first output end is connected to a gas-liquid separation unit for gas-liquid separation; and the second output end is located at a lower position of the supercritical water gasification module (7), and the second output end is connected to a slag discharge unit for ash separation.

6. A solar-heated kitchen waste gasification hydrogen production and copper powder reduction system according to claim 5, characterized in that: The gas-liquid separation unit comprises a second cooler (14), a gas-liquid separator (15) and a water tank (16); The input end of the second cooler (14) is connected to the first output end of the supercritical water gasification module (7); the output end of the second cooler (14) is connected to the input end of the gas-liquid separator (15); and the liquid output end of the gas-liquid separator (15) is connected to the water tank (16).

7. A solar-heated kitchen waste gasification hydrogen production and copper powder reduction system according to claim 6, characterized in that: It also includes a multidirectional heat exchanger (19); the multidirectional heat exchanger (19) is arranged between the second cooler (14) and the first output end of the supercritical water gasification module (7), and the output end of the copper solution output pipeline is connected to the input end of the preheating pipeline (10) after passing through the multidirectional heat exchanger (19).

8. The solar-heated kitchen waste gasification hydrogen production and copper powder reduction system according to claim 5, characterized in that: The slag discharge unit comprises a third cooler (17) and a lock hopper (18); The input end of the third cooler (17) is connected to the second output end of the supercritical water gasification module (7), and the output end of the third cooler (17) is connected to the input end of the lock hopper (18); the lock hopper (18) is also provided with a water injection pipeline and a slag discharge pipeline; the water injection pipeline is provided with a water injection ball valve, and the slag discharge pipeline is provided with a slag discharge needle valve.

9. A method for using a solar-heated kitchen waste gasification hydrogen production and copper powder reduction system, characterized in that: A solar-heated kitchen waste gasification hydrogen production and copper powder reduction system according to any one of claims 1 to 8, wherein the method of using the system comprises the following steps: The water and the kitchen waste slurry are respectively input into the supercritical water gasification module (7) of the outermost layer of the coupled reaction device (6) through the water preheating output unit and the slurry output pipeline, and the supercritical water gasification module (7) is heated by the solar heating module, and the heat is transferred to the preheating pipeline (10); the water and the kitchen waste slurry in the supercritical water gasification module (7) are heated to generate gasification products, and the gasification products are separated into pure hydrogen through the palladium membrane (8), and the pure hydrogen is used as a reducing agent to enter the supercritical water thermal synthesis module (9); The copper precursor solution and the modifier are respectively input into the preheating pipeline (10) through the copper solution output pipeline, and flow into the supercritical hydrothermal synthesis module (9) after preheating. The copper precursor solution and the modifier are subjected to a reduction reaction by pure hydrogen to obtain a product, which is then output to the copper powder separation unit for separation to obtain copper powder.

Images