Biomass pyrolysis hydrogen production system
By setting up a cyclone separation device in the biomass pyrolysis hydrogen production system, the catalyst and carbon powder are separated from the hydrogen and recycled, the problem of difficult to effectively utilize catalysts and carbon powder in the prior art is solved, and the effect of extending the catalyst life and improving the purity of hydrogen is achieved.
Patent Information
- Application Number
- CN202420152668.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-01-22
- Publication Date
- 2025-03-28
- Estimated Expiration
- 2034-01-22
AI Technical Summary
In the existing biomass pyrolysis gas reforming hydrogen production technology, the catalyst entrained in the hydrogen and the incompletely reacted carbon powder are difficult to be effectively utilized, resulting in clogging of the filter parts and accumulation of catalysts, affecting the purity of the hydrogen and the catalyst life.
A biomass pyrolysis hydrogen production system is designed, and the catalyst and carbon powder are separated by setting a first cyclone separation device at the synthesis gas outlet of the reforming hydrogen production furnace, and recirculated into the hydrogen production furnace to achieve full utilization of the catalyst and carbon powder.
Effective separation and reuse of catalysts and carbon powder extends the service life of the catalyst, avoids filter parts blockage, and improves the purity of hydrogen and the efficiency of the hydrogen production system.
Smart Images
Figure CN222684552U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of preparing hydrogen by pyrolysis of biomass, and in particular to a biomass pyrolysis hydrogen production system. Background Art
[0002] As a clean fuel and important chemical raw material, hydrogen energy has a wide range of uses in the fields of chemical industry, transportation, energy, etc. At the same time, the development of hydrogen energy, especially green hydrogen, is also an important path to achieve the dual carbon goals. Due to the inherent properties of biomass, hydrogen produced from biomass is identified as green hydrogen. In terms of biomass hydrogen production technology, it can usually be divided into thermochemical hydrogen production and biological hydrogen production. Biological hydrogen production is mainly based on fermentation hydrogen production, photolysis hydrogen production and biogas reforming hydrogen production.
[0003] Thermochemical hydrogen production technology mainly includes biomass gasification hydrogen production and biomass pyrolysis gas reforming hydrogen production. In the biomass pyrolysis gas reforming hydrogen production technology, hydrogen is mainly generated by the reaction of carbon powder formed by biomass pyrolysis with a catalyst. In the prior art, a purification device is set up, and the filter element in the purification device filters the generated hydrogen, thereby improving the purity of the hydrogen.
[0004] However, since the hydrogen produced in the biomass pyrolysis gas reforming hydrogen production process carries the catalyst used in the reaction and some incompletely reacted carbon powder, by setting up a filter to filter the hydrogen, the catalyst and carbon powder are isolated on the filter, which may cause the filter to be blocked, and the catalyst and carbon powder are accumulated on the filter, making it impossible to fully utilize the catalyst and the incompletely reacted carbon powder. Utility Model Content
[0005] In view of the above-mentioned deficiencies in the prior art, the utility model provides a biomass pyrolysis hydrogen production system, which can separate the catalyst and incompletely reacted carbon powder entrained in the hydrogen produced by the hydrogen production reaction, and recycle them into the hydrogen production furnace for reaction, thereby fully utilizing the catalyst and incompletely reacted carbon powder.
[0006] The utility model provides a biomass pyrolysis hydrogen production system, comprising a reforming hydrogen production furnace, a synthesis gas outlet is arranged on the top of the furnace, and further comprising:
[0007] The first cyclone separation device has a first inlet on one side, a first gas outlet on the top, and a first solid outlet on the bottom. The first inlet is connected to the synthesis gas outlet, and the first solid outlet is connected to the interior of the reforming hydrogen production furnace.
[0008] Preferably, the first solid outlet is connected to a pipeline, the other end of the pipeline is connected to the reforming hydrogen production furnace, and the pipeline is inclined so that the end of the pipeline connected to the first solid outlet is higher than the end connected to the reforming hydrogen production furnace.
[0009] Preferably, it also includes a second cyclone separation device, a second inlet is provided on one side of the second cyclone separation device, a second gas outlet is provided on the top, and a second solid outlet is provided on the bottom, the second inlet is connected to the first gas outlet, and a ash collection pool is provided at the bottom of the second cyclone separation device, and the second solid outlet is connected to the ash collection pool.
[0010] Preferably, the first cyclonic separation device has a first separation factor, and the second cyclonic separation device has a second separation factor, and the second separation factor is greater than the first separation factor.
[0011] Preferably, a discharge port is provided at the bottom of the reforming hydrogen production furnace, and the discharge port is connected to a recovery pool, and the recovery pool is used to recover the catalyst.
[0012] Preferably, the method further comprises a heating device, which is arranged in the recovery tank and is used for calcining the catalyst.
[0013] Preferably, the second gas outlet is connected to a hydrogen purification device, and the outlet of the hydrogen purification device is connected to a hydrogen storage tank.
[0014] Compared with the prior art, the biomass pyrolysis hydrogen production system provided by the utility model has the following beneficial effects:
[0015] By connecting the first cyclone separation device to the synthesis gas outlet of the reforming hydrogen production furnace, the first cyclone separation device can separate the catalyst and carbon powder from the synthesis gas, and re-transport the separated catalyst and carbon powder to the interior of the reforming hydrogen production furnace, thereby achieving full utilization of the catalyst and carbon powder and increasing the service life of the catalyst. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present utility model;
[0017] Figure 2 This is a schematic diagram of the overall structure of Example 2 of the utility model.
[0018] Description of reference numerals:
[0019] 1. Reforming hydrogen production furnace; 101. Synthesis gas outlet; 2. First cyclone separation device; 201. Pipeline; 3. Recovery tank; 4. Second cyclone separation device; 5. Ash collection tank; 6. Hydrogen purification device; 601. Crude hydrogen purification device; 602. Hydrogen purification device; 7. Hydrogen storage tank. DETAILED DESCRIPTION
[0020] The following is combined with Figure 1 to Figure 2, the specific implementation methods of the utility model are described in detail, but it should be understood that the protection scope of the utility model is not limited by the specific implementation methods.
[0021] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.
[0022] In addition, in the description of this application, "plurality" means two or more than two. The terms "first" and "second" are used for descriptive purposes only and should not be understood as suggesting or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the feature.
[0023] Example 1
[0024] This embodiment provides a biomass pyrolysis hydrogen production system, such as Figure 1 As shown, it includes a reforming hydrogen production furnace 1, a synthesis gas outlet 101 is arranged on the top of the reforming hydrogen production furnace, and a first cyclone separation device 2 is also included.
[0025] A first inlet is provided on one side of the first cyclone separation device 2 , a first gas outlet is provided on the top, and a first solid outlet is provided on the bottom. The first inlet is connected to the synthesis gas outlet 101 , and the first solid outlet is connected to the interior of the reforming hydrogen production furnace 1 .
[0026] The first cyclone separation device may be a cyclone separator for gas-solid separation.
[0027] The biomass carbon powder in the reforming hydrogen production furnace 1 reacts with the catalyst to produce synthesis gas. During the discharge of the synthesis gas, some carbon powder and catalyst may be entrained. By setting up the first cyclone separation device 2, the carbon powder and catalyst entrained in the synthesis gas can be separated.
[0028] In addition, the first solid outlet of the first cyclone separation device 2 is connected to the interior of the reforming hydrogen production furnace 1, so that the separated carbon powder and catalyst can be transported to the interior of the reforming hydrogen production furnace 1 again to achieve recycling for hydrogen production reaction.
[0029] In order to ensure that the solids separated by the first cyclone separation device 2 can smoothly enter the interior of the reforming hydrogen production furnace 1, the first solid outlet is connected to a pipeline 201, and the other end of the pipeline 201 is connected to the reforming hydrogen production furnace 1. The pipeline 201 is tilted so that the end of the pipeline 201 connected to the first solid outlet is higher than the end connected to the reforming hydrogen production furnace 1. The tilted setting of the pipeline 201 can avoid blockage of the conveying channel. The separated solids smoothly enter the interior of the reforming hydrogen production furnace 1 under the action of their own gravity and the internal pressure of the first cyclone separation device 2.
[0030] Example 2
[0031] Based on Example 1, this example provides a biomass pyrolysis hydrogen production system, in order to further separate the dust impurities entrained in the synthesis gas, such as Figure 2 As shown, a second cyclone separation device 4 is further provided behind the first cyclone separation device 2, a second inlet is provided on one side of the second cyclone separation device 4, a second gas outlet is provided on the top, a second solid outlet is provided on the bottom, the second inlet is connected to the first gas outlet, a ash collection pool 5 is provided at the bottom of the second cyclone separation device 4, and the second solid outlet is connected to the ash collection pool 5.
[0032] In order to improve the separation effect, the first cyclone separation device 2 has a first separation factor, and the second cyclone separation device 4 has a second separation factor, which is greater than the first separation factor.
[0033] The first cyclone separation device 2 is used to separate the larger particles of carbon powder and catalyst, and then the second cyclone separation device 4 is used to separate the smaller particles of carbon powder and catalyst, so that the carbon powder and catalyst in the synthesis gas can be further fully separated and collected.
[0034] In order to collect the catalyst after the reforming hydrogen production furnace 1 reacts, a discharge port is provided at the bottom of the reforming hydrogen production furnace 1 , and the discharge port is connected to a recovery pool 3 , and the recovery pool 3 is used to recover the catalyst.
[0035] The catalyst used in the reforming hydrogen production furnace 1 in this embodiment can be selected from one or more of dolomite, olivine, MgO, MoO, Al2O3, ZrO2, CeO2 or active substances such as Cu, Ni, Co, Fe or the like loaded thereon. The above catalysts can be used alone or in combination of multiple types in different proportions.
[0036] In order to realize the reuse of the catalyst, a heating device is also included, which is arranged in the recovery tank 3 and is used to calcine the catalyst.
[0037] The catalyst collected in the recovery pool 3 can be regenerated and activated by high-temperature roasting at 850°C to 900°C, and can be reused 5 to 6 times. The catalyst can be regenerated and reused by high-temperature roasting, which greatly improves the service life of the catalyst.
[0038] Furthermore, the second gas outlet is connected to a hydrogen purification device 6, and the outlet of the hydrogen purification device 6 is connected to a hydrogen storage tank 7. In this embodiment, the hydrogen purification device 6 includes a crude hydrogen purification device 601 and a hydrogen purification device 602.
[0039] The gas output from the second gas outlet of the second cyclone separation device 4 first enters the crude hydrogen purification device 601 to remove impurities such as water vapor and fine ash powder, and then is sent to the hydrogen purification device 602, and is sent to the storage tank 7 after being purified to 99.9 vol%.
[0040] The above disclosure is only a preferred specific embodiment of the present invention, but the embodiments of the present invention are not limited thereto, and any changes that can be conceived by technicians in this field should fall within the protection scope of the present invention.
Claims
1. A biomass pyrolysis hydrogen production system, comprising a reforming hydrogen production furnace (1), the top of which is provided with a synthesis gas outlet (101), characterized in that: Also includes: A first cyclone separation device (2), having a first inlet disposed on one side, a first gas outlet disposed on the top, and a first solid outlet disposed on the bottom, wherein the first inlet is connected to the synthesis gas outlet (101), and the first solid outlet is connected to the interior of the reforming hydrogen production furnace (1); The first solid outlet is connected to a pipeline (201), the other end of the pipeline (201) is in communication with the reforming hydrogen production furnace (1), and the pipeline (201) is arranged at an angle so that the end of the pipeline (201) connected to the first solid outlet is higher than the end connected to the reforming hydrogen production furnace (1); The invention also comprises a second cyclone separation device (4), wherein a second inlet is arranged on one side of the second cyclone separation device (4), a second gas outlet is arranged on the top, and a second solid outlet is arranged on the bottom, wherein the second inlet is connected to the first gas outlet, and an ash collection pool (5) is arranged on the bottom of the second cyclone separation device (4), wherein the second solid outlet is connected to the ash collection pool (5).
2. The biomass pyrolysis hydrogen production system according to claim 1, characterized in that: The first cyclonic separation device (2) has a first separation factor, and the second cyclonic separation device (4) has a second separation factor, which is greater than the first separation factor.
3. The biomass pyrolysis hydrogen production system according to claim 1, characterized in that: The bottom of the reforming hydrogen production furnace (1) is provided with a discharge port, the discharge port is connected to a recovery pool (3), and the recovery pool (3) is used to recover the catalyst.
4. The biomass pyrolysis hydrogen production system according to claim 3, characterized in that: It also comprises a heating device, which is arranged in the recovery tank (3) and is used for calcining the catalyst.
5. The biomass pyrolysis hydrogen production system according to claim 1, characterized in that: The second gas outlet is connected to a hydrogen purification device (6), and the outlet of the hydrogen purification device (6) is connected to a hydrogen storage tank (7).