Process integrated green electricity hydrogen production and biomass gasification green methanol production combined device
By designing a full-process integrated green electricity hydrogen production and biomass gasification and green methanol production, the by-product oxygen and carbon dioxide are recycled and utilized, and the composition of synthesis gas is optimized, the problem of utilization of by-product oxygen and carbon dioxide in biomass gasification technology is solved, and the reduction of equipment investment and operating costs are achieved, as well as the near-zero emissions of biomass carbon are achieved.
Patent Information
- Application Number
- CN202420532204.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-19
- Publication Date
- 2025-03-11
- Estimated Expiration
- 2034-03-19
AI Technical Summary
In the existing biomass gasification technology, it is difficult to effectively utilize the by-product of hydrogen produced by green electricity, and the nitrogen content in the biomass gasification synthesis gas is high, and a large amount of carbon dioxide is emitted during the purification of the gasification synthesis gas, resulting in complex processes and high equipment investment and operation costs.
A full-process integrated unit of green electricity hydrogen production and biomass gasification to green methanol was designed. By recycling and utilizing the oxygen produced by the green electricity hydrogen production device and carbon dioxide produced by the synthesis gas purification device, the composition of synthesis gas is optimized, the nitrogen content is reduced, and the recovered carbon dioxide is used for the pressurization and transportation of biomass raw materials.
It has achieved simple system, reduced equipment investment and operating costs, improved production stability, reduced comprehensive energy consumption, achieved near-zero emissions of biomass carbon, and created higher economic, social and environmental benefits.
Smart Images
Figure CN222593768U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the field of biogasification, in particular to a combined device for integrating the processes of green electricity hydrogen production and biomass gasification green methanol production. Background Art
[0002] Biomass gasification is a process that uses biomass as raw material and air, water vapor, oxygen, carbon dioxide, etc. or their mixture as gasification agent to convert biomass into synthesis gas through thermochemical reaction at high temperature.
[0003] With the continuous development of biomass renewable energy technology, the current development direction of advanced gasification technology is large-scale, and pressurized gasification and pure oxygen gasification are the main means to achieve large-scale.
[0004] Hydrogen production by water electrolysis is a process in which water molecules are dissociated into hydrogen and oxygen through an electrochemical process under the action of direct current, and the hydrogen and oxygen are precipitated at the cathode and anode respectively. Currently, there are two mature technologies: alkaline liquid water electrolysis hydrogen production and solid polymer water electrolysis hydrogen production.
[0005] Announcement No. 101519604B discloses a multi-stage controlled poly-free radical biomass gasification renewable energy system, which can convert a wide range of biomass into high-quality energy. Each sub-step of the gasification process: pretreatment, pyrolysis, carbon conversion, ash melting, tar cracking, synthesis gas reforming, and waste heat utilization are finely controlled and integrated one by one to achieve optimization; the wet gas of the pretreated material is introduced into the carbon conversion unit to achieve anaerobic pyrolysis; the gasification gas contacts a large number of active free radicals in the poly-free radical acceleration reaction unit; after purification, it enters downstream applications such as power generation, hydrogen production, and biomass methanol and ethanol production. This solution requires biomass gasification to obtain gasification gas, which is purified and used in the downstream, to achieve the application of biomass renewable energy to a certain extent, but the process is relatively complicated, and does not solve the problems of the utilization of oxygen by-product of green electricity hydrogen production, the high nitrogen content of biomass gasification synthesis gas, and the large amount of carbon dioxide emitted during the purification of gasification synthesis gas. Summary of the invention
[0006] The purpose of the utility model is to solve the above-mentioned technical problems and to provide a combined device for the whole process of integrating green electricity hydrogen production and biomass gasification to produce green methanol, which has a simple system, can effectively recycle and utilize oxygen produced as a by-product of hydrogen production, purify by-product carbon dioxide, effectively reduce the nitrogen content in methanol synthesis gas, achieve near-zero carbon dioxide emissions, and reduce equipment investment and operating costs.
[0007] The technical solution includes a biomass gasification device, wherein the crude synthesis gas outlet of the biomass gasification device is connected to the synthesis gas purification device and the methanol synthesis device in sequence;
[0008] It also includes a green electricity hydrogen production device, and the hydrogen outlet of the green electricity hydrogen production device is connected to the methanol synthesis device.
[0009] The oxygen outlet of the green electricity hydrogen production device is connected to the gasification agent inlet of the biomass gasification device.
[0010] The carbon dioxide outlet of the synthesis gas purification device is connected to the gasification agent inlet of the biomass gasification device.
[0011] The carbon dioxide outlet of the synthesis gas purification device is also connected to a biomass feeding system.
[0012] Beneficial effects:
[0013] (1) The utility model integrates and utilizes the oxygen produced as a byproduct of the green electricity hydrogen production device, blends the byproduct oxygen with the carbon dioxide produced as a byproduct of the synthesis gas purification device, and provides a gasifying agent to the biomass gasification device, thereby improving the quality of the gasified synthesis gas and saving the investment in air separation equipment and the energy consumption of oxygen production;
[0014] (2) The carbon dioxide from the synthesis gas purification device is recovered and used for pressurizing and conveying biomass raw materials, thereby improving the quality of the gasified synthesis gas; at the same time, the recovered carbon dioxide is mixed with pure oxygen to dilute the pure oxygen and stabilize the production operation of the biomass gasification device, thereby solving the problem of poor operating stability of the pure oxygen biomass gasification device;
[0015] (3) The utility model solves the problems of utilization of oxygen as a byproduct of green electricity hydrogen production, high nitrogen content in biomass gasification synthesis gas, and large amounts of carbon dioxide emissions during gasification synthesis gas purification. At the same time, it reduces equipment investment in the combined device, improves production stability, reduces the comprehensive energy consumption of green alcohol products, achieves near-zero emissions of biomass carbon, and can create higher economic, social and environmental benefits. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 This is a system diagram of the utility model.
[0017] Among them, 1-green electricity hydrogen production device, 2-biomass gasification device, 3-synthesis gas purification device, 4-methanol synthesis device, 5-biomass feeding system. DETAILED DESCRIPTION
[0018] The utility model is further explained below in conjunction with the accompanying drawings:
[0019] See also Figure 1 The crude synthesis gas outlet of the biomass gasification device 2 is connected to the synthesis gas purification device 3 and the methanol synthesis device 4 in sequence; the green electricity hydrogen production device 1 has a hydrogen outlet and an oxygen outlet, wherein the hydrogen outlet is connected to the methanol synthesis device 4, and the oxygen outlet is connected to the gasification agent inlet of the biomass gasification device 2; the carbon dioxide outlet of the synthesis gas purification device 3 is respectively connected to the gasification agent inlet of the biomass gasification device 2 and the inlet of the biomass feeding system 5.
[0020] Process:
[0021] See also Figure 1 The biomass raw material is pressurized and fed into the biomass gasification device 2 through the biomass feeding system 5, and undergoes a gasification reaction with the oxygen from the green power hydrogen production device 1 in the biomass gasification device 2 to generate a crude synthesis gas. The crude synthesis gas is sent to the synthesis gas purification device 3 for purification to remove acidic gases and carbon dioxide therein. The purified synthesis gas is sent to the methanol synthesis device 4 to react with the hydrogen from the green power hydrogen production device 1 to generate methanol.
[0022] The hydrogen generated from the green electricity hydrogen production device 1 is sent to the methanol synthesis device 4 to adjust the composition of the purified synthesis gas, and the carbon monoxide and carbon dioxide therein are completely converted into methanol in the methanol device; the oxygen produced as a by-product of the green electricity hydrogen production device 1 is sent to the biomass gasification device 2 as a gasifying agent to react with the biomass for gasification; the carbon dioxide separated by the synthesis gas purification device 3 is divided into two streams, one of which is used as an inert gas required by the biomass gasification device and as a carrier gas for the biomass feed, and enters the crude synthesis gas, a part of which reacts with the biomass to generate carbon monoxide, which is converted into methanol in the methanol device, and the rest is used as a carrier gas for the slag and fly ash discharge of the gasifier, and a small amount is discharged; the other stream is mixed with oxygen to adjust the oxygen concentration of the gasifying agent.
[0023] The utility model recycles the oxygen produced as a by-product of the green electricity hydrogen production device, and recycles the carbon dioxide produced as a by-product of the synthesis gas purification device, optimizes the composition of the synthesis gas, increases the operating stability of the gasifier, reduces the production energy consumption of the combined device, achieves near-zero emissions of biomass raw material carbon, and can create higher economic, social and environmental benefits.
Claims
1. A combined device for integrating green electricity hydrogen production and biomass gasification to produce green methanol, comprising a biomass gasification device, characterized in that: The crude synthesis gas outlet of the biomass gasification device is connected to the synthesis gas purification device and the methanol synthesis device in sequence; It also includes a green electricity hydrogen production device, and the hydrogen outlet of the green electricity hydrogen production device is connected to the methanol synthesis device.
2. The combined device for integrating green electricity hydrogen production and biomass gasification to produce green methanol as described in claim 1, characterized in that: The oxygen outlet of the green electricity hydrogen production device is connected to the gasification agent inlet of the biomass gasification device.
3. The combined device for integrating green electricity hydrogen production and biomass gasification to produce green methanol as described in claim 1, characterized in that: The carbon dioxide outlet of the synthesis gas purification device is connected to the gasification agent inlet of the biomass gasification device.
4. The combined device for integrating green electricity hydrogen production and biomass gasification to produce green methanol as described in claim 3 is characterized in that: The carbon dioxide outlet of the synthesis gas purification device is also connected to a biomass feeding system.