Resource recycling system for coupling methane reforming with waste salt pyrolysis driven by solar energy

Abstract

The invention relates to the technical field of methane reforming and resource recycling, and particularly discloses a resource recycling system for coupling methane reforming with waste salt pyrolysis driven by solar energy, which comprises a methane reforming reaction chamber, a waste salt pyrolysis reaction chamber and a plurality of light condensing components, a multi-stage heat absorption channel is arranged in the waste salt pyrolysis reaction chamber, a plurality of guide plates are arranged in the multi-stage heat absorption channel, and a waste salt runner is formed by the plurality of guide plates; the methane reforming reaction chamber is communicated with the waste salt pyrolysis reaction chamber through a heat flow channel, and the heat flow channel provides heat for the waste salt pyrolysis reaction chamber; the waste salt pyrolysis reaction chamber is communicated with a waste gas purification and recovery channel, and CO2 gas generated by pyrolysis enters the methane reforming reaction chamber through the waste gas purification and recovery channel to provide a carbon source; according to the system, product salt obtained after high-temperature pyrolysis serves as a fused salt material for heat storage utilization, a pyrolytic carbon material serves as a fused salt thermophysical property reinforcing agent, the cleanliness and resource property of the product are improved, and meanwhile the problems of waste treatment and low-cost development of the fused salt heat storage material are solved.

Description

Technical Field

[0001] The invention relates to the technical field of methane reforming and resource recycling, and in particular to a resource recycling system of solar-driven methane reforming coupled with waste salt pyrolysis. Background Art

[0002] Hydrogen energy has the advantages of being clean, zero carbon, and having a high combustion calorific value. 2 It shows broad application prospects and potential in emission reduction and energy structure transformation. As the main component of natural gas, methane can be used to produce hydrogen on a large scale through reforming reaction, and its large-scale application has significant carbon reduction effect. Based on the strong endothermic characteristics of methane reforming reaction, solar-driven methane reforming can absorb solar thermal energy equivalent to up to 23% of the high calorific value of methane, and store and utilize solar energy in the form of chemical energy, achieving the beneficial effects of simultaneously increasing the proportion of solar energy in hydrogen energy and reducing carbon emissions from hydrogen production. Therefore, solar-driven natural gas reforming hydrogen production technology is expected to play an important role in the near and medium term. However, the combination of methane reforming and solar concentrating and collecting technology produces a reaction temperature of up to 800°C, resulting in high radiation heat loss and convection heat loss.

[0003] Industrial waste salt is mainly produced in industrial production processes such as pesticide intermediates, drug synthesis and printing and dyeing, as well as solid-liquid separation, solution concentration crystallization and sewage treatment. It has the characteristics of many types, complex composition, wide sources, high content of toxic and harmful substances, and great environmental harm. Based on the low stability of organic pollutants in waste salt at high temperature, thermal treatment is a common method to effectively remove organic pollutants in waste salt. Traditional industrial waste salt treatment and disposal technology consumes a lot of energy. The high-temperature heat generated by combining methane reforming with solar energy concentration and collection technology is coupled to the waste salt treatment process, which is expected to solve the challenges of high energy waste and high carbon emissions. After high-temperature pyrolysis treatment, the rich product salt can be used as molten salt heat storage material, and the organic pollutants react to generate some carbon materials as additives, which can simultaneously solve the problems of high-value synthesis gas generation, waste treatment and low-cost development of molten salt heat storage materials.

[0004] However, there are currently no reports on technologies that couple pyrolysis of industrial waste salt with solar methane reforming to achieve resource recycling. Summary of the invention

[0005] In order to solve the above technical problems, the purpose of the present invention is to provide a resource recycling system of solar-driven methane reforming coupled with waste salt pyrolysis, to solve the challenges of high temperature, high energy consumption and high carbon emissions of traditional reforming hydrogen production, and at the same time solve the energy consumption problems of traditional industrial waste salt treatment and disposal technologies, effectively improve the decomposition rate of organic matter and energy utilization rate, and use the product salt as a molten salt material for heat storage, and use the pyrolysis carbon material as a molten salt thermal property enhancer to improve the cleanliness and resource nature of the product.

[0006] The purpose of the present invention can be achieved through the following technical solutions:

[0007] The present invention provides a solar-driven methane reforming coupled with waste salt pyrolysis resource recycling system, comprising: a methane reforming reaction chamber, a waste salt pyrolysis reaction chamber and a plurality of light-collecting components;

[0008] The methane reforming reaction chamber is used to convert CO 2 and CH 4 Convert to high value syngas CO and H 2 ;

[0009] The waste salt pyrolysis reaction chamber has a multi-stage heat absorption channel inside, and the waste salt flows in the multi-stage heat absorption channel to undergo pyrolysis reaction;

[0010] The multiple light focusing components are used to provide focused light sources for the methane reforming reaction chamber and the waste salt pyrolysis reaction chamber;

[0011] The methane reforming reaction chamber is connected to the waste salt pyrolysis reaction chamber by a heat flow channel, and the waste heat of the methane reforming reaction chamber flows into the waste salt pyrolysis reaction chamber, thereby purifying and treating the waste salt;

[0012] The multi-stage heat absorption channel has a plurality of guide plates inside, and a waste salt flow channel is formed inside the multi-stage heat absorption channel through the plurality of guide plates.

[0013] The waste salt pyrolysis reaction chamber is connected to the waste gas purification recovery channel to provide the CO generated by pyrolysis 2 The gas enters the methane reforming reaction chamber through the exhaust gas purification recovery channel to provide carbon source utilization;

[0014] The guide plate is hingedly connected to the multi-stage heat absorption channel, and an adjustment device is provided between the guide plate and the multi-stage heat absorption channel, and the adjustment device is used to adjust the inclination of the guide plate.

[0015] Furthermore, a catalytic reactor is provided in the methane reforming reaction chamber, which is communicated with an air intake channel. The air intake channel has a flow controller. The air intake channel includes a methane air intake channel, a carbon dioxide air intake channel and a nitrogen air intake channel.

[0016] Furthermore, the methane reforming reaction chamber and the gas scrubber are connected through a gas outlet passage, and the synthesis gas enters a gas collecting tank for storage after passing through the gas scrubber.

[0017] Furthermore, the methane reforming reaction chamber is connected to the waste salt pyrolysis reaction chamber via a heat flow channel, and the heat flow channel is arranged in an S shape to provide heat for the waste salt pyrolysis reaction chamber.

[0018] Furthermore, a thermocouple is provided in the waste salt pyrolysis reaction chamber to monitor the temperature in the waste salt pyrolysis reaction chamber in real time.

[0019] Furthermore, the waste salt flow channel is arranged in an S shape.

[0020] Furthermore, the adjusting device is an electric telescopic rod, both ends of which are hingedly connected to the guide plate and the multi-stage heat absorption channel respectively, and the angle between the guide plate and the multi-stage heat absorption channel is controlled by the extension amount of the electric telescopic rod.

[0021] Furthermore, the multi-stage heat absorption channel is communicated with a storage bin, and the storage bin is arranged at the bottom of the waste salt pyrolysis reaction chamber, and the waste salt enters the storage bin for storage by gravity.

[0022] Furthermore, the waste salt pyrolysis reaction chamber is connected to the gas purification device through the waste gas purification recovery channel, and the CO generated by the waste salt pyrolysis 2 The gas enters the methane reforming reaction chamber through the exhaust gas purification recovery channel to provide carbon source utilization.

[0023] Furthermore, the focusing component is a curved Fresnel transmission concentrator, and the distance between the curved Fresnel transmission concentrator and the catalytic reactor is equal to the focal length of the curved Fresnel transmission concentrator.

[0024] The beneficial effects that this application can produce are as follows:

[0025] The focusing component in the present invention provides heat for the methane reforming reaction chamber to complete the production of hydrogen, and the focusing temperature and heat flow can be adjusted by the focusing component. Solar energy is clean and renewable, and a large amount of energy can be saved. At the same time, the product of the methane reforming reaction is synthesis gas, which can also be used as a raw material and widely used in the production of various high value-added chemical products.

[0026] The waste heat from the methane reforming reaction chamber can be used to heat the industrial waste salt through the heat flow channel, and the organic pollutants in the industrial waste salt can be pyrolyzed. Compared with the traditional industrial waste salt treatment and disposal technology with huge energy consumption, it has obvious advantages. At the same time, the CO generated by the pyrolysis of waste salt 2 The methane is captured by a gas purification device and recycled into the reforming reaction chamber to reduce carbon emissions and mitigate the greenhouse effect.

[0027] The inclination angle of the guide plate can be adjusted by the electric telescopic rod to control the flow rate of industrial waste salt. The multi-stage plate-type heat absorption channel effectively prolongs the effective reaction time of industrial waste salt, allowing the industrial waste salt to be fully heated and degraded inside, achieving efficient removal of organic pollutants.

[0028] By using the product salt after high-temperature pyrolysis as molten salt material for heat storage, and using pyrolytic carbon material as a molten salt thermal property enhancer, the cleanliness and resource value of the product are improved, while solving the problems of waste disposal and low-cost development of molten salt heat storage materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 Schematic diagram of the overall structure of a resource recycling system for solar-driven methane reforming coupled with waste salt pyrolysis in an embodiment.

[0030] Figure 2 Schematic diagram of a multi-stage heat absorption channel in an embodiment.

[0031] Figure 3 This is a plan view of the flow of waste salt in a multi-stage heat absorption channel in the embodiment.

[0032] Among them, 10, focusing component; 20, methane reforming reaction chamber; 21, catalytic reactor; 22, gas washing device; 23, gas collecting tank; 30, waste salt pyrolysis reaction chamber; 31, heat flow channel; 32, thermocouple; 40, flow controller; 41, methane air inlet channel; 42, carbon dioxide air inlet channel; 43, nitrogen air inlet channel; 44, waste gas purification and recovery channel; 45, gas purification device; 50, multi-stage heat absorption channel; 51, guide plate; 52, adjustment device; 53, baffle; 54, storage bin. DETAILED DESCRIPTION

[0033] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0034] In order to solve the challenges of high temperature, high energy consumption and high carbon emission of traditional reforming hydrogen production, as well as the problem that a large amount of waste salt cannot be disposed of in large quantities at present, the present invention overcomes the shortcomings and deficiencies of existing industrial waste salt high-temperature treatment devices, and provides a resource recycling system of solar-driven methane reforming coupled with waste salt pyrolysis, which completes the production of high-value syngas, and at the same time realizes the heating of industrial waste salt particles with a simple structure, effectively improving the decomposition rate of organic matter and energy utilization rate; CO generated by waste salt pyrolysis 2 The gas is captured by a gas purification device and recycled into the methane reforming reaction chamber to reduce carbon emissions and alleviate the greenhouse effect. The product salt is used as a molten salt material for heat storage, and the pyrolysis carbon material is used as a molten salt thermal property enhancer to improve the cleanliness and resource value of the product.

[0035] The technical solutions in the embodiments are described clearly and completely below in conjunction with the drawings of the embodiments. Obviously, the described embodiments are only a part of the embodiments, rather than all the embodiments.

[0036] Example

[0037] Reference Figures 1 to 3 This embodiment provides a resource recycling system for solar-driven methane reforming coupled with waste salt pyrolysis, including multiple focusing components 10, a methane reforming reaction chamber 20, a waste salt pyrolysis reaction chamber 30, a gas purification device 45 and a multi-stage heat absorption channel 50.

[0038] Specifically, the methane reforming reaction chamber 20 is used to convert CO 2 and CH 4 Convert to high value syngas CO and H 2 , with a catalytic reactor 21 inside, which is connected to the intake channel, and the intake channel includes a methane intake channel 41, a carbon dioxide intake channel 42 and a nitrogen intake channel 43.

[0039] Specifically, a plurality of guide plates 51 are provided inside the multi-stage heat absorption channel 50 , and a waste salt flow channel is formed inside the multi-stage heat absorption channel 50 through the plurality of guide plates 51 .

[0040] Specifically, the plurality of light focusing components 10 are used to provide a focused light source for the methane reforming reaction chamber 20 .

[0041] Specifically, the storage bin 54 is configured to be in communication with the multi-stage heat absorption channel 50, and the waste salt flow channel is arranged in an S shape.

[0042] In this embodiment, the multi-stage heat absorption channel 50 includes baffles 53, and the baffles 53 are connected to form an enclosed rectangular pipeline.

[0043] Specifically, the focusing component 10 is a curved Fresnel transmission concentrator, and the distance between the curved Fresnel transmission concentrator and the catalytic reactor 21 is equal to the focal length of the curved Fresnel transmission concentrator.

[0044] Specifically, the waste salt pyrolysis reaction chamber 30 is connected to the waste gas purification recovery channel 44 to provide the CO generated by pyrolysis. 2 The gas enters the methane reforming reaction chamber 20 through the exhaust gas purification recovery channel 44 to provide carbon source utilization.

[0045] In this embodiment, the air inlet channel is provided with a flow controller 40, the catalytic reactor 21 has a catalyst inside and is connected to the scrubber 22 through the air outlet channel, and the synthesis gas enters the gas collecting tank 23 for storage after passing through the scrubber 22.

[0046] Specifically, the methane reforming reaction chamber 20 is connected to the waste salt pyrolysis reaction chamber 30 via a heat flow channel 31 , and the heat flow channel 31 is arranged in an S shape to transport the heat energy in the methane reforming reaction chamber 20 to the waste salt pyrolysis reaction chamber 30 to provide heat.

[0047] In this embodiment, a thermocouple 32 is provided in the waste salt pyrolysis reaction chamber 30 for real-time monitoring of the temperature in the waste salt pyrolysis reaction chamber 30 .

[0048] Specifically, the multi-stage heat absorption channel 50 is communicated with the storage bin 54, and the storage bin 54 is arranged at the bottom of the multi-stage heat absorption channel 50. The waste salt enters the storage bin 54 for storage by gravity.

[0049] In this embodiment, the guide plate 51 is configured to be hingedly connected to the multi-stage heat absorption channel 50 .

[0050] An adjusting device 52 is arranged between the guide plate 51 and the multi-stage heat absorption channel 50. The adjusting device 52 is used to support the guide plate 51. At the same time, the adjusting device 52 can adjust the inclination of the guide plate 51. The adjusting device 52 can adjust the guide plate 51 to a horizontal state, thereby achieving the interception of industrial waste salt.

[0051] In this embodiment, the adjusting device 52 is an electric telescopic rod. The two ends of the electric telescopic rod are respectively hingedly connected to the guide plate 51 and the multi-stage heat absorption channel 50. The angle between the guide plate 51 and the multi-stage heat absorption channel 50 is controlled by the extension amount of the electric telescopic rod.

[0052] Exemplarily, three or four guide plates 51 are provided.

[0053] Specifically, the waste salt pyrolysis reaction chamber 30 is connected to the gas purification device 45 through the waste gas purification recovery channel 44, and the CO generated by the waste salt pyrolysis is 2 The gas enters the methane reforming reaction chamber 20 through the exhaust gas purification recovery channel 44 to provide carbon source utilization.

[0054] In some embodiments not shown, the heat flow channel 31 further includes a fan, which is connected to the heat flow channel 31 . The fan can draw the hot air in the methane reforming reaction chamber 20 into the multi-stage heat absorption channel 50 .

[0055] In some embodiments, the guide plate 51 and the baffle plate 53 are made of a copper-aluminum composite material, so that the guide plate 51 and the baffle plate 53 have a good heat absorption effect.

[0056] In some embodiments, the surfaces of the guide plate 51 and the baffle plate 53 are sprayed with a selective coating to further enhance the heat absorption effect.

[0057] The working method of the resource recycling system of solar-driven methane reforming coupled with waste salt pyrolysis in this embodiment includes the following steps:

[0058] (1) The focused light source is delivered to the methane reforming reaction chamber 20 through a curved Fresnel transmission concentrator, so that the catalytic reactor 21 reaches 800 degrees Celsius;

[0059] (2) Open the flow controller 40 to introduce the reaction gas CH into the methane reforming reaction chamber 20. 4 and CO 2 The reaction gas reacts in the catalytic reactor 21 to generate synthesis gas H 2 and CO, the synthesis gas passes through the scrubber 22 along the gas outlet channel and then enters the gas collecting tank 23 for storage and utilization;

[0060] (3) Open the heat flow channel 31 to transfer the heat energy in the methane reforming reaction chamber 20 to the waste salt pyrolysis reaction chamber 30; adjust the guide plate 51 to be in a horizontal state, and let the industrial waste salt mixture to be treated fall onto the highest guide plate 51, and pyrolyze the mixture to be treated in the waste salt flow channel for a period of time, and adjust the electric telescopic rod 52 to tilt the guide plate 51 to 30°, so that the mixture to be treated falls onto the next guide plate 51, and the total residence time of the industrial waste salt in the multi-stage heat absorption channel 50 is adjusted to control the heating time of the industrial waste salt particles;

[0061] (4) After the industrial waste salt is repeatedly pyrolyzed on multiple guide plates 51 under the action of gravity, the CO generated by the pyrolysis 2 After passing through the gas purification device 45, it flows along the capture and utilization waste gas purification and recovery channel 44 to the methane reforming reaction chamber 20; after the industrial waste salt undergoes sufficient pyrolysis reaction in the multi-stage heat absorption channel 50, the organic impurities generate part of the carbon material, which enters the storage bin 54 along the guide plate 51 with the product salt for storage, and is used as an industrial waste salt-based molten salt heat storage material.

[0062] The above is a specific description of the preferred implementation of the present invention, but the invention is not limited to the embodiments. Those skilled in the art may make various equivalent modifications or substitutions without violating the spirit of the present invention. These equivalent modifications or substitutions are all included in the scope defined by the claims of this application.

Claims

1. A solar-driven methane reforming coupled with waste salt pyrolysis resource recycling system, characterized in that: include: A methane reforming reaction chamber (20) for converting CO2 and CH4 into high-value synthesis gas CO and H2; The waste salt pyrolysis reaction chamber (30) has a multi-stage heat absorption channel (50) inside, and the waste salt flows in the multi-stage heat absorption channel (50) to undergo pyrolysis reaction; and a plurality of light focusing components (10) for providing focused light sources for the methane reforming reaction chamber (20) and the waste salt pyrolysis reaction chamber (30); The methane reforming reaction chamber (20) is connected to the waste salt pyrolysis reaction chamber (30) via a heat flow channel (31), and the waste heat of the methane reforming reaction chamber (20) flows into the waste salt pyrolysis reaction chamber (30), thereby purifying and treating the waste salt; The multi-stage heat absorption channel (50) has a plurality of guide plates (51) inside, and a waste salt flow channel is formed inside the multi-stage heat absorption channel (50) through the plurality of guide plates (51); The waste salt pyrolysis reaction chamber (30) is in communication with the waste gas purification and recovery channel (44) so ​​that the CO2 gas generated by the pyrolysis can enter the methane reforming reaction chamber (20) through the waste gas purification and recovery channel (44) to provide a carbon source for utilization; The guide plate (51) is hingedly connected to the multi-stage heat absorption channel (50), and an adjustment device (52) is provided between the guide plate (51) and the multi-stage heat absorption channel (50), and the adjustment device (52) is used to adjust the inclination of the guide plate (51).

2. According to claim 1, a solar-driven methane reforming coupled with waste salt pyrolysis resource recycling system is characterized in that: The methane reforming reaction chamber (20) has a catalytic reactor (21) in it, which is communicated with an air intake channel. The air intake channel has a flow controller (40). The air intake channel includes a methane air intake channel (41), a carbon dioxide air intake channel (42) and a nitrogen air intake channel (43).

3. According to claim 1, a solar-driven methane reforming coupled with waste salt pyrolysis resource recycling system is characterized in that: The methane reforming reaction chamber (20) and the gas scrubber (22) are connected via a gas outlet passage, and the synthesis gas passes through the gas scrubber (22) and enters a gas collecting tank (23) for storage.

4. According to claim 1, a solar-driven methane reforming coupled with waste salt pyrolysis resource recycling system is characterized in that: The methane reforming reaction chamber (20) is connected to the waste salt pyrolysis reaction chamber (30) via a heat flow channel (31), and the heat flow channel (31) is arranged in an S shape to provide heat for the waste salt pyrolysis reaction chamber (30).

5. According to claim 1, a solar-driven methane reforming coupled with waste salt pyrolysis resource recycling system is characterized in that: A thermocouple (32) is provided in the waste salt pyrolysis reaction chamber (30) to monitor the temperature in the waste salt pyrolysis reaction chamber (30) in real time.

6. According to claim 1, a solar-driven methane reforming coupled with waste salt pyrolysis resource recycling system is characterized in that: The waste salt flow channel is arranged in an S shape.

7. According to claim 1, a solar-driven methane reforming coupled with waste salt pyrolysis resource recycling system is characterized in that: The regulating device (52) is an electric telescopic rod, and the two ends of the electric telescopic rod are respectively hingedly connected to the guide plate (51) and the multi-stage heat absorption channel (50); the size of the angle between the guide plate (51) and the multi-stage heat absorption channel (50) is controlled by the extension amount of the electric telescopic rod.

8. According to claim 1, a solar-driven methane reforming coupled with waste salt pyrolysis resource recycling system is characterized in that: The multi-stage heat absorption channel (50) is in communication with a storage bin (54), and the storage bin (54) is arranged at the bottom of the waste salt pyrolysis reaction chamber (30). The waste salt enters the storage bin (54) by gravity for storage.

9. The solar-driven methane reforming coupled with waste salt pyrolysis resource recycling system according to claim 1, characterized in that: The waste salt pyrolysis reaction chamber (30) is connected to the gas purification device (45) via a waste gas purification recovery channel (44), and the CO2 gas generated by the waste salt pyrolysis enters the methane reforming reaction chamber (20) through the waste gas purification recovery channel (44) to provide a carbon source for utilization.

10. The solar-driven methane reforming coupled waste salt pyrolysis resource recycling system according to claim 2, characterized in that: The focusing component (10) is a curved Fresnel transmission concentrator; the distance between the curved Fresnel transmission concentrator and the catalytic reactor (21) is equal to the focal length of the curved Fresnel transmission concentrator.

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