Generator for hydrogen production from biomass

By designing partitions to separate chambers in the biomass hydrogen generator and using separators and membrane wall protection equipment, the problems of low biomass CC bond activation efficiency and equipment corrosion were solved, achieving efficient biomass gasification and hydrogen production.

WO2026067547A1PCT designated stage Publication Date: 2026-04-02BEIJING FULL PENG TECHNOLOGY CO LTD
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Patent Information

Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Filing Date
2025-09-25
Publication Date
2026-04-02

AI Technical Summary

Technical Problem

In existing biomass hydrogen production technologies, the C-C bonds of biomass are difficult to activate directly, the catalyst efficiency is low, the corrosive substances in the syngas during the gasification process easily cause equipment corrosion, and the pyrolysis efficiency and carbon conversion rate are insufficient.

Method used

Design a biomass hydrogen generator, using a partition to divide the pressure-bearing outer shell into a first chamber and a second chamber. The gasification reactor is located in the first chamber. A separator is used to separate liquid water vapor and ash from the syngas. The combustion chamber is divided into combustion chambers of different diameters to improve the suspension dispersion space and pyrolysis efficiency. A membrane wall and a vibrator are used to protect the equipment, avoid corrosion and improve steam production.

Benefits of technology

It achieves full pyrolysis and gasification of biomass, improves carbon conversion rate and thermal efficiency, avoids equipment corrosion, ensures the safety and stability of the gasifier, and increases hydrogen production.

✦ Generated by Eureka AI based on patent content.

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Abstract

Disclosed in the present invention is a generator for hydrogen production from biomass, which generator belongs to the field of hydrogen production from biomass. The generator comprises: a pressure-bearing housing, wherein the pressure-bearing housing is divided into a first chamber and a second chamber arranged one above the other by a partition plate, a burner being provided at the top of the first chamber, and a slag-water outlet being provided at the bottom of the second chamber; and a gasification reactor, which is located in the first chamber and is in communication with the first chamber, wherein the gasification reactor comprises a combustion chamber and a steam generation chamber, the combustion chamber comprising a first combustion chamber and a second combustion chamber sequentially arranged from top to bottom, the diameter of the first combustion chamber being greater than the diameter of the second combustion chamber, the top of the first combustion chamber being connected to the burner, the bottom of the second combustion chamber being connected to the top of the steam generation chamber, and the steam generation chamber being in communication with the second chamber. The present invention can achieve hydrogen production from biomass, and has a high carbon conversion rate and thermal efficiency.
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Description

Biomass hydrogen production furnace

[0001] The present application claims priority to Chinese Patent Application No. 202411351675.0, filed on September 26, 2024, entitled "Biomass hydrogen production furnace" and Chinese Patent Application No. 202422361627.1, filed on September 26, 2024, entitled "Biomass hydrogen production equipment", the contents of which are incorporated herein by reference in their entirety. TECHNICAL FIELD

[0002] The present application relates to the field of biomass hydrogen production, in particular to a biomass hydrogen production furnace. BACKGROUND

[0003] Biohydrogen is one of the important ways to obtain hydrogen from nature sustainably, which mainly includes photocatalysis, fermentation hydrogen production, steam gasification and other technologies. Photocatalytic biomass hydrogen production uses sunlight and biological materials to produce hydrogen through light conversion. Electrons are generated by oxidation, and hydrogen is generated by reduction of protons. This method requires the decomposition of biomass, but the C-C bond of biomass is difficult to activate directly, so a specific catalyst is needed to improve the efficiency. Fermentation hydrogen production reduces the activation energy of water splitting through whole-cell catalysis, does not rely on additional energy, and only uses organic matter to produce hydrogen. This method has low energy consumption, but the yield is relatively low. Steam gasification hydrogen production uses steam as a gasifying agent to gasify biomass raw materials, and ultimately converts them into hydrogen-rich fuels. The biomass raw materials go through drying, pyrolysis, reduction and combustion stages to produce mixed gaseous products. This process not only includes the pyrolysis of biomass fuel at high temperature and under anaerobic conditions, but also involves hydrogen production by gasification and microbial catalytic dehydrogenation methods, in which the biomass fuel is converted into hydrogen and carbon dioxide through gasification technology, and then the carbon dioxide is captured from the produced gas stream through a reactor-based process, effectively removing carbon dioxide from the atmosphere, thereby achieving carbon capture and storage. This technology not only helps to produce hydrogen needed for future economy, but also uses photosynthesis to complete the arduous task of absorbing carbon dioxide from the atmosphere, thereby providing a new solution for sustainable hydrogen production. For this reason, biomass gasification hydrogen production technology has become an important development direction for biomass hydrogen production.

[0004] Based on this, the present application is proposed. SUMMARY

[0005] To this end, the present application proposes a biomass hydrogen production furnace for realizing biomass gasification hydrogen production.

[0006] In view of the above technical problems, the present application provides the following technical solutions:

[0007] The application discloses a biomass hydrogen production furnace, which comprises a pressure-bearing shell, a first chamber and a second chamber arranged in a top-bottom mode and separated by a partition plate, a burner arranged at the top of the first chamber, and a slag water outlet arranged at the bottom of the second chamber; a gasification reactor arranged in the first chamber and connected with each other, wherein the gasification reactor comprises a combustion chamber and a steam generation chamber, the combustion chamber comprises a first combustion chamber and a second combustion chamber arranged in a top-bottom mode, the length-diameter ratio of the first combustion chamber is smaller than that of the second combustion chamber, the top of the first combustion chamber is connected with the burner, the bottom of the second combustion chamber is connected with the top of the steam generation chamber, and the steam generation chamber is connected with the second chamber.

[0008] In some embodiments of the application, a plurality of separators are arranged between the gasification reactor and the pressure-bearing shell, a plurality of communication holes are arranged on the partition plate, the separators are arranged on the communication holes of the partition plate, and the flue gas in the second chamber enters the first chamber through the separators; the separator comprises a separation pipe and a filter which are connected with each other, and the separation pipe is arranged on the communication hole of the partition plate.

[0009] In some embodiments of the application, the separators are arranged in the annular cavity between the gasification reactor and the pressure-bearing shell in a circumferential direction.

[0010] In some embodiments of the application, a gas guide cylinder is arranged around the outlet of the steam generation chamber on the lower side of the partition plate.

[0011] In some embodiments of the application, the length-diameter ratio of the first combustion chamber is 2-6, and the length-diameter ratio of the second combustion chamber is 1-8.

[0012] In some embodiments of the application, the pressure-bearing shell is detachably connected by a first half shell and a second half shell, the first half shell and the partition plate form the first chamber, and the second half shell and the partition plate form the second chamber.

[0013] In some embodiments of the application, the combustion chamber and the steam generation chamber are prepared by using a membrane wall.

[0014] In some embodiments of the application, a mounting hole is arranged on the shell wall of the first half shell, a rapping device is arranged on the mounting hole, and the rapping device acts on the outer wall of the steam generation chamber.

[0015] In some embodiments of the application, the cavity wall of the second half shell is further provided with a synthetic gas outlet, an alkali liquid adding port and a washing water inlet.

[0016] In some embodiments of the present application, the upper portion of the steam generating chamber is provided with an atomized water spraying assembly, which comprises a water spraying pipe and a plurality of atomized nozzles arranged on the water spraying pipe, and the plurality of atomized nozzles form a ring-shaped water curtain.

[0017] The technical scheme of the present application has the following technical effects compared with the prior art:

[0018] In the biomass hydrogen production furnace provided by the present application, the pressure-bearing shell is divided into a first chamber and a second chamber by a partition, and the gasification reactor is arranged in the first chamber, so that the inner wall of the pressure-bearing shell and the outer wall of the gasification reactor are prevented from being corroded by the acid moisture as much as possible. In addition, the combustion chamber is divided into a first combustion chamber located at the upper side and having a larger diameter and a second combustion chamber located at the lower side and having a smaller diameter, so that the first combustion chamber provides sufficient space for the suspension and dispersion of the biomass powder, and the biomass is completely removed of the volatile matter, and the pyrolysis of the biomass generates products such as tar, wood vinegar and carbon particles, and at the same time, 70% (wt) of the carbon elements in the biomass react with oxygen to generate carbon dioxide. The pyrolysis products enter the second combustion chamber under the double effects of gravity and airflow entrainment, and move downward in the advection reaction zone of the second combustion chamber, and in the process of the advection, the carbon particles entrained by the gas are captured by the liquid ash, and the carbon particles flow downward with the liquid ash to complete the gasification reaction, and the remaining 30% (wt) of the carbon elements in the first combustion chamber react with the carbon dioxide and water to generate synthesis gas mainly composed of carbon monoxide and hydrogen. The high-temperature synthesis gas and the liquid ash enter the steam generator to be cooled to 800 DEG C, and the sensible heat is recovered in the form of steam, and at the same time, a small amount of short-circuit carbon particles that are not captured continue to react in the steam generator, so that the carbon conversion rate and the thermal efficiency are further improved.

[0019] Further, in the biomass hydrogen production furnace provided by the present application, in order to prevent the synthesis gas containing ash and water vapor from flowing from the second chamber to the first chamber to corrode the pressure-bearing shell when the gasification furnace is boosted or the pressure fluctuates. A plurality of separators are arranged between the gasification reactor and the pressure-bearing shell, and the separators comprise a plurality of separation pipes and a plurality of filters, so that the liquid water vapor in the synthesis gas can be separated and the ash in the synthesis gas can be filtered, and the corrosion is avoided. Further, in the biomass hydrogen production furnace provided by the present application, the combustion chamber and the steam generating chamber are prepared by using a membrane wall to protect the pressure-bearing shell, so that the intrinsic safety of the gasification furnace is ensured, and the problem of difficult selection of the heat insulation material is ingeniously solved.

[0020] Further, in the biomass hydrogen production furnace provided by the present application, the first half shell of the pressure-bearing shell is provided with an external insulation layer, so that the temperature of the first half shell during operation is greater than the dew point temperature under the pressure of the synthesis gas, and the condensation of water in the synthesis gas flowing into the annular cavity is avoided, and a wet hydrogen sulfide corrosion environment is formed.

[0021] Further, the biomass hydrogen production furnace provided by the present application is provided with a vibrator installed on the first half-outer shell to intermittently vibrate the steam generator, so as to eliminate the potassium salt and sodium salt on the wall surface of the steam generator, and ensure the stable steam output of the steam generator. BRIEF DESCRIPTION OF DRAWINGS

[0022] The preferred embodiments of the present application will be described in detail below with the help of the accompanying drawings, which will help to understand the purposes and advantages of the present application.

[0023] Fig. 1 is a structural schematic view of one specific embodiment of the biomass hydrogen production furnace of the present application;

[0024] Fig. 2 is a structural schematic view of one specific embodiment of the pressure-bearing outer shell of the biomass hydrogen production furnace of the present application;

[0025] Fig. 3 is a structural schematic view of one specific embodiment of the gasification reactor of the biomass hydrogen production furnace of the present application;

[0026] Fig. 4 is a structural schematic view of one specific embodiment of the separator of the biomass hydrogen production furnace of the present application;

[0027] Fig. 5 is a structural schematic view of one specific embodiment of the vibrator of the biomass hydrogen production furnace of the present application;

[0028] Fig. 6 is a structural schematic view of one specific embodiment of the atomizing water spraying assembly in the steam generation chamber of the biomass hydrogen production furnace of the present application. DETAILED DESCRIPTION

[0029] The technical solutions of the present application will be described in detail below with the help of the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0030] In the description of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only used to facilitate the description of the present application and simplify the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second", "third" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance.

[0031] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "linking" should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integral connection; can be directly connected, can also be indirectly connected through intermediate medium, can be internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0032] In addition, the technical features involved in the different embodiments of the application described below can be combined with each other as long as there is no conflict.

[0033] As shown in Figure 1 is a specific embodiment of the biomass hydrogen production furnace of the present application, comprising a pressure shell 10, the pressure shell 10 is divided into first chamber 10a and second chamber 10b arranged above and below by partition 15, the top of the first chamber 10a is provided with a burner 13, the bottom of the second chamber 10b is provided with a slag water outlet 14; gasification reactor 20 located in the first chamber 10a and arranged in communication with each other, the gasification reactor 20 includes a combustion chamber 21 and a steam generating chamber 22, the combustion chamber 21 includes a first combustion chamber 211 and a second combustion chamber 212 arranged from top to bottom, the diameter of the first combustion chamber 211 is greater than the diameter of the second combustion chamber 212, the top of the first combustion chamber 211 is connected with the burner 13, the bottom of the second combustion chamber 212 is connected with the top of the steam generating chamber 22, the steam generating chamber 22 is communicated with the second chamber 10b.

[0034] In the biomass hydrogen production furnace, the pressure shell 10 is divided into first chamber 10a and second chamber 10b by setting partition 15, wherein the gasification reactor 20 is arranged in the first chamber 10a as a whole, and the contact of the inner wall of the pressure shell 10 and the outer wall of the gasification reactor 20 with the corrosive acid moisture is avoided as much as possible.

[0035] In the hydrogen production furnace pressure boosting stage or pressure fluctuation, there will be ash and water vapor containing synthetic gas from the second chamber 10b to the first chamber 10a annular cavity (the cavity between the inner wall of the pressure shell 10 and the outer wall of the gasification reactor 20), the ash contains sulfur, chloride and other corrosive substances, the synthetic gas contains carbon dioxide, hydrogen sulfide and other wet environment corrosive gas, which will corrode the inner wall of the pressure shell 10 and the outer wall of the gasification reactor 20. In order to avoid the corrosion of the synthetic gas to the inner wall of the first chamber 10a, in a specific embodiment, the biomass hydrogen production furnace further comprises a plurality of separators 30 located between the gasification reactor 20 and the pressure shell 10, the partition plate 15 is provided with a plurality of communication holes, and the separator 30 is installed on the communication hole of the partition plate 15, for making the flue gas in the second chamber 10b enter the first chamber 10a through the separator 30. By arranging a plurality of separators 30 between the gasification reactor 20 and the pressure shell 10, the liquid water vapor in the synthetic gas can be separated and the ash in the synthetic gas can be filtered, so as to avoid corrosion.

[0036] Specifically, in an optional embodiment, as shown in Figure 4, the separator 30 comprises a separation pipe 31 and a filter 32 connected with each other, and the separation pipe 31 is installed on the communication hole of the partition plate 15. The filter 32 is composed of a filter unit (such as sintered metal, woven metal mesh, or sintered felt) and its steel skeleton, and the filtering precision is 5-100 microns. In order to avoid the formation of mortar by water vapor and ash, the filter 32 is blocked. The separation pipe 31 is arranged in front of the filter 32. In the process of upward movement of the crude synthetic gas containing liquid water vapor in the separation pipe 31, the liquid water vapor collides with each other, and gathers into large droplets, which fall along the pipe wall to the second chamber 10b under the action of gravity, so as to realize separation.

[0037] Specifically, in an optional embodiment, a plurality of separators 30 are uniformly distributed in the annular cavity between the gasification reactor 20 and the pressure shell 10 in the circumferential direction, which can realize the separation of water vapor and ash in each region.

[0038] Specifically, in an optional embodiment, as shown in Figure 1, the lower side of the partition plate 15 is provided with a gas guide cylinder 40 surrounding the outlet of the steam generation chamber 22. The cooled synthetic gas enters the water area of the second chamber 10b through the gas guide cylinder 40, and is washed by bubbling to the upper part of the gasification furnace, and then is sent out of the gasification furnace. The liquid slag enters the water area of the second chamber 10b to form solid slag, which is discharged from the hydrogen production furnace through the slag water outlet 14.

[0039] Specifically, in an alternative embodiment, according to the high volatile nature of the biomass, as shown in FIG. 3, the length-diameter ratio of the first combustion chamber 211 is 2-6, which provides sufficient space for the suspension and dispersion of the biomass powder, so that the biomass is completely deprived of the volatile matter and fully pyrolyzed to generate products such as tar, wood vinegar, carbon particles, etc. The pyrolysis products, under the dual action of gravity and airflow entrainment, enter the small-diameter section and move downward in the horizontal reaction zone, and the length-diameter ratio of the second combustion chamber 212 is 1-8. In the process of rectification, the carbon particles entrained by the gas are captured by the liquid ash, and the carbon particles flow downward with the liquid ash to complete the gasification reaction to generate synthesis gas mainly composed of carbon monoxide and hydrogen and melt in the liquid ash.

[0040] Wherein, the working temperature of the steam generation chamber 22 is controlled at about 800℃, the high-temperature synthesis gas entrains the liquid ash into the steam generation chamber 22 to be cooled to 800℃, and the sensible heat is recovered in the form of steam, and at the same time, a small amount of short-circuit carbon particles that are not captured continue to react in the steam generation chamber 22, further improving the carbon conversion rate and thermal efficiency.

[0041] Specifically, in an alternative embodiment, as shown in FIG. 2, the pressure-containing shell 10 is detachably connected by the first half shell 11 and the second half shell 12, and specifically, the two are detachably connected by flange structure. The first half shell 11 and the partition plate 15 form the first chamber 10a, and the second half shell 12 and the partition plate 15 form the second chamber 10b. Wherein, the partition plate 15 is installed on the upper part of the second half shell 12 and located on the lower side of the flange of the second half shell 12, so as to avoid the flange of the first half shell 11 being corroded by the flue gas to affect the service life of the first half shell 11. Through the above structure, the second half shell 12 which contacts more corrosive flue gas can be replaced regularly, so as to realize the updating of the biomass hydrogen generation furnace.

[0042] The working pressure allowed by the pressure-containing shell 10 is in the range of 0.2MPa(G)~6.5MPa(G), the first half shell 11 is provided with an external insulation layer, and the temperature during the working of the pressure-containing shell 10 is greater than the dew point temperature under the pressure of the synthesis gas, so as to avoid the condensation of water in the synthesis gas which strays to the annular cavity, and form wet hydrogen sulfide to corrode the inner wall of the pressure-containing shell 10. The working temperature of the second chamber 10b is less than 200℃, which is less than the dew point temperature (260℃) under the pressure of the synthesis gas, so as to make the synthesis gas condense quickly and fall into the washing water in the lower area of the second chamber 10b, and at the same time, the cavity wall of the second half shell 12 is also provided with a synthesis gas outlet, a lye adding port and a washing water inlet.

[0043] Specifically, in an alternative embodiment, the combustion chamber 21 and the steam generation chamber 22 are made of a membrane wall. The inner wall of the combustion chamber 21 is provided with a heat insulation layer, the temperature in the combustion chamber 21 is > 1200℃, the inner wall of the steam generation chamber 22 is provided with a heat absorbing screen, and the end temperature of the steam generation chamber 22 is > 800℃, so that the synthesis gas can be directly introduced into the water area through the gas guide cylinder 40 without reaching the crystallization temperature.

[0044] Specifically, in an alternative embodiment, the shell wall of the first half shell 11 is provided with a mounting hole, and a rapping device 50 is mounted on the mounting hole. The rapping device 50 acts on the outer wall of the steam generation chamber 22. Specifically, as shown in FIG. 5, an anvil plate 221 is welded on the outer wall of the steam generation chamber 22, and the rapping device 50 acts on the anvil plate 221 to intermittently rapping the steam generation chamber 22, thereby eliminating the potassium salt and sodium salt on the wall of the steam generation chamber 22 and ensuring the stable steam production of the steam generation chamber 22, so as to improve the hydrogen production efficiency of the biomass hydrogen production furnace.

[0045] Specifically, in an alternative embodiment, the steam generation chamber 22 is provided with an atomizing water spraying assembly. The atomizing water spraying assembly includes a water spraying pipe 222 and a plurality of atomizing nozzles 223 arranged on the water spraying pipe 222. The plurality of atomizing nozzles 223 form an annular water curtain to pre-cool the molten slag and high-temperature synthesis gas entering the steam generation chamber 22, thereby avoiding the slag hanging in the steam generation chamber 22 caused by the fluctuation of the biomass raw material and leading to the attenuation of the by-product steam. More specifically, as shown in FIG. 6, the lower side of the second combustion chamber 212 extends into the steam generation chamber 22 along the top opening of the steam generation chamber 22, and the two are sealingly connected. The water spraying pipe 222 of the atomizing water spraying assembly is arranged on the outer wall of the second combustion chamber 212 inside the steam generation chamber 22, and the atomizing nozzles 223 are uniformly distributed on the water spraying pipe 222 in the circumferential direction.

[0046] Obviously, the above embodiments are only examples for clarity and are not limiting on the embodiments. Based on the above description, those skilled in the art can make other different forms of changes or modifications. Here, it is not necessary and impossible to exhaust all the embodiments. The obvious changes or modifications derived therefrom are still within the protection scope of the present application.

Claims

1. A biomass hydrogen generation furnace, characterized by comprising: The application relates to a gasification reactor. The application also relates to a gasification reactor. The application further relates to a gasification reactor.

2. The biomass hydrogen generation furnace according to claim 1, wherein The application still further relates to a gasification reactor.

3. The biomass hydrogen generation furnace according to claim 2, wherein The application yet further relates to a gasification reactor.

4. The biomass hydrogen generation furnace according to claim 1, wherein The application still further relates to a gasification reactor.

5. The biomass hydrogen generation furnace according to claim 1, wherein The application yet further relates to a gasification reactor.

6. The biomass hydrogen generation furnace according to claim 1, wherein The application still further relates to a gasification reactor.

7. The biomass hydrogen generation furnace according to claim 1, wherein The application yet further relates to a gasification reactor.

8. The biomass hydrogen generation furnace according to claim 6, wherein The application still further relates to a gasification reactor.

9. The biomass hydrogen generation furnace according to claim 6, wherein The application yet further relates to a gasification reactor.

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