Bamboo activated carbon and bamboo-based chemical co-production process

Abstract

The invention discloses a co-production process of bamboo activated carbon and bamboo-based chemicals. The full utilization of bamboo biological raw materials is realized. Bamboo biological raw materials are divided into a first bamboo biological raw material and a second bamboo biological raw material, then the first bamboo biological raw material is gasified to obtain a first gas-phase product, and the second bamboo biological raw material is carbonized through a carbonization reactor to obtain a first solid-phase product and a second gas-phase product; activating the first solid-phase product through an activation reactor to obtain a second solid-phase product and a third gas-phase product; the first gas-phase product and the second gas-phase product are used for at least one of a process A and a process B, the third gas-phase product is used for at least one of a process A, a process B and a process C, the process A is used for outputting the corresponding gas-phase product as fuel, and the process B is used for preparing the hydrocarbon synthetic fuel by taking the corresponding gas-phase product as a reaction raw material of a synthesis reactor. And in the process C, the corresponding gas-phase product sequentially passes through a first conversion reactor and a pressure swing adsorber to obtain hydrogen.

Description

Technical Field

[0001] The invention relates to a process for co-producing bamboo activated carbon and bamboo-based chemicals and equipment for co-producing bamboo activated carbon and bamboo-based chemicals. Background Art

[0002] As an important biomass resource, bamboo has the characteristics of short growth cycle, high yield, and significant carbon sink effect. Its fiber structure is dense and its carbon content is high, which is particularly suitable for the preparation of activated carbon and chemical conversion. At present, there are two main ways to utilize bamboo biomass: on the one hand, activated carbon, as an important adsorption material, is widely used in industrial production and environmental protection. The preparation of traditional bamboo activated carbon adopts the two-step method of carbonization-activation, but the gas phase byproducts produced in this process are often not fully utilized, and even directly discharged to cause environmental pollution. On the other hand, bamboo biomass gasification is an important thermochemical conversion technology that can convert bamboo biomass into synthesis gas containing CO, H2, etc. These synthesis gases can be converted into high value-added chemicals such as aviation fuel and methanol through routes such as Fischer-Tropsch synthesis. However, a single gasification process has problems such as low energy utilization efficiency and single product. In the prior art, both activated carbon preparation and gasification conversion use a single process route, and lack a system integration solution for multi-product co-production. This leads to problems such as insufficient utilization of bamboo biological raw materials, waste of byproducts, and low economic benefits. Therefore, it is of great significance to develop a new process that can achieve the synergistic production of activated carbon and chemicals. Summary of the invention

[0003] The purpose of the present invention is to provide a bamboo activated carbon and bamboo-based chemical co-production process and a bamboo activated carbon and bamboo-based chemical co-production equipment to achieve full utilization of bamboo biological raw materials.

[0004] A process for co-producing bamboo activated carbon and bamboo-based chemicals comprises the following steps: dividing a bamboo biological raw material into a first bamboo biological raw material and a second bamboo biological raw material, then subjecting the first bamboo biological raw material to gasification treatment through a gasification reactor to obtain a first gas phase product, subjecting the second bamboo biological raw material to carbonization treatment through a carbonization reactor to obtain a first solid phase product and a second gas phase product, subjecting the first solid phase product to activation treatment through an activation reactor to obtain a second solid phase product and a third gas phase product, wherein the second solid phase product is bamboo activated carbon; using the first gas phase product for at least one of process A and process B, using the second gas phase product for at least one of process A and process B, and using the third gas phase product for at least one of process A, process B and process C, wherein process A is to output the corresponding gas phase product as fuel, process B is to use the corresponding gas phase product as a reaction raw material of a synthesis reactor to prepare hydrocarbon synthetic fuel, and process C is to sequentially subject the corresponding gas phase product to a first conversion reactor and a pressure swing adsorber to obtain hydrogen.

[0005] The above-mentioned bamboo activated carbon and bamboo-based chemical co-production process realizes the preparation of bamboo activated carbon by distributing bamboo biomass raw materials for gasification and carbonization treatment, and activating the carbonization products; at the same time, by using the first gas phase product, the second gas phase product and the third gas phase product produced by the gasification treatment, the carbonization treatment and the activation treatment for fuel output (process A), the preparation of hydrocarbon synthetic fuel (process B) and the preparation of hydrogen (process C), respectively, the comprehensive utilization of gas phase by-products is realized, the waste of resources is avoided, and the utilization efficiency of bamboo biomass raw materials is improved.

[0006] A bamboo activated carbon and bamboo-based chemical co-production equipment comprises: a gasification reactor for gasifying a first bamboo biological raw material distributed from the bamboo biological raw material to obtain a first gas phase product; a carbonization reactor for carbonizing a second bamboo biological raw material distributed from the bamboo biological raw material to obtain a first solid phase product and a second gas phase product; an activation reactor for activating the first solid phase product to obtain a second solid phase product and a third gas phase product, wherein the second solid phase product is bamboo activated carbon; and a gas phase product processing system, wherein the gas phase product processing system can use the first gas phase product for at least one of process A and process B, use the second gas phase product for at least one of process A and process B, and use the third gas phase product for at least one of process A, process B and process C; wherein process A is to output the corresponding gas phase product as fuel, process B is to use the corresponding gas phase product as a reaction raw material of a synthesis reactor to prepare hydrocarbon synthetic fuel, and process C is to obtain hydrogen by sequentially passing the corresponding gas phase product through a first shift reactor and a pressure swing adsorber.

[0007] The above-mentioned bamboo activated carbon and bamboo-based chemical co-production equipment constructs a complete bamboo biomass conversion system through the coordinated cooperation of gasification reactor, carbonization reactor, activation reactor and gas phase product processing system. The gas phase product processing system can flexibly allocate the gas phase products produced by each reactor for different purposes such as fuel output, hydrocarbon synthetic fuel preparation and hydrogen preparation, realizing the multifunctional integration of equipment and overcoming the shortcomings of single function of existing single process route equipment.

[0008] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. Additional aspects and advantages provided by the present invention will be partially given in the following description, partially become apparent from the following description, or be learned through practice. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] The drawings constituting a part of this specification are used to assist the understanding of the present invention. The contents provided in the drawings and the related descriptions in this specification can be used to explain the present invention, but do not constitute improper limitations on the present invention.

[0010] Figure 1This is a schematic diagram of a bamboo activated carbon and bamboo-based chemical co-production equipment according to an embodiment of the present invention.

[0011] Figure 1 The solid line indicates the flow direction of physical and liquid substances; the dotted line indicates the flow direction of gaseous substances.

[0012] Figure 2 This is a schematic diagram of the second shift reactor portion in a bamboo activated carbon and bamboo-based chemicals co-production device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0013] The present invention is described clearly and completely below in conjunction with the accompanying drawings. A person skilled in the art will be able to implement the present invention based on these descriptions. Before describing the present invention in conjunction with the accompanying drawings, it should be particularly noted that:

[0014] The technical solutions and technical features provided in each section, including the following description, can be combined with each other without conflict. In addition, where possible, these technical solutions, technical features and related combinations can be assigned specific technical themes and protected by relevant patents.

[0015] The embodiments of the present invention involved in the following description are generally only a part of the embodiments rather than all the embodiments. Based on these embodiments, all other embodiments obtained by ordinary technicians in this field without making creative work should fall within the scope of patent protection.

[0016] The terms "include", "comprises", "have" and any variations thereof in this specification and the corresponding claims and related parts are intended to cover non-exclusive inclusions. Other related terms and units can be reasonably interpreted based on the relevant content provided in this specification.

[0017] Figure 1 Schematic diagram of a bamboo activated carbon and bamboo-based chemical co-production equipment according to an embodiment of the present invention. Figure 1As shown, the bamboo activated carbon and bamboo-based chemical co-production equipment includes: a gasification reactor 1, which is used to gasify the first bamboo biological raw material distributed from the bamboo biological raw material to obtain a first gas phase product; a carbonization reactor 2, which is used to carbonize the second bamboo biological raw material distributed from the bamboo biological raw material to obtain a first solid phase product and a second gas phase product; an activation reactor 3, which is used to activate the first solid phase product to obtain a second solid phase product and a third gas phase product, wherein the second solid phase product is bamboo activated carbon; and a gas phase product processing system 4, wherein the gas phase product processing system 4 can use the first gas phase product for at least one of process A and process B, use the second gas phase product for at least one of process A and process B, and use the third gas phase product for at least one of process A, process B and process C; wherein, process A is to output the corresponding gas phase product as fuel, process B is to use the corresponding gas phase product as a reaction raw material of a synthesis reactor 41 to prepare hydrocarbon synthetic fuel (such as aviation fuel and / or methanol), and process C is to sequentially pass the corresponding gas phase product through a first shift reactor 42 and a pressure swing adsorber 43 to obtain hydrogen.

[0018] The above-mentioned bamboo activated carbon and bamboo-based chemical co-production equipment constructs a complete bamboo biomass conversion system through the coordinated cooperation of the gasification reactor 1, the carbonization reactor 2, the activation reactor 3 and the gas phase product processing system 4, wherein the gas phase product processing system can flexibly allocate the gas phase products produced by each reactor for different purposes such as fuel output, hydrocarbon synthetic fuel preparation and hydrogen preparation, thereby realizing the multifunctional integration of the equipment and overcoming the shortcomings of the single function of the existing single process route equipment.

[0019] Specifically, the above-mentioned bamboo activated carbon and bamboo-based chemical co-production equipment includes a condenser 45 that condenses the corresponding gas phase product during the implementation of process A and transmits the condensed gas to the combustion furnace 44.

[0020] Specifically, the condenser 45 can input the condensed material into the synthesis reactor 41 as the reaction raw material of the synthesis reactor 41 .

[0021] The corresponding gas phase products are condensed by the condenser 45, and the condensable components (tar, acetic acid, methanol, aldehydes, ketones) therein can be recovered. These condensable components are used as raw materials for the synthesis reactor 41, thereby realizing the high-value utilization of the condensable components in the gas phase products.

[0022] In addition, the above-mentioned bamboo activated carbon and bamboo-based chemical co-production equipment may also include a boiler 46 that utilizes the high-temperature flue gas generated by the combustion furnace 44 to provide heat and / or generate steam for steam power generation. The electricity generated by the steam power generation (through the generator 47) is used for the water electrolysis hydrogen production device 48.

[0023] Through the energy conversion chain of combustion furnace-boiler-generator-water electrolysis hydrogen production device, full energy utilization is achieved and the energy utilization efficiency of the system is improved.

[0024] Specifically, at least a portion of the hydrogen produced by the water electrolysis hydrogen production device 48 is input into the synthesis reactor 41 as a reaction raw material of the synthesis reactor 41 .

[0025] Therefore, using hydrogen produced by water electrolysis as a raw material for the synthesis reaction provides an additional hydrogen source, which is beneficial to improving the conversion rate of the synthesis reaction.

[0026] Generally speaking: the temperature of the gasification treatment is 700-1000°C; the temperature of the carbonization treatment is 300-600°C; the activation treatment includes physical activation, and the physical activation uses one or more of water vapor, carbon dioxide or air as an activating agent; the temperature of the activation treatment is 600-900°C.

[0027] In addition, a second shift reactor 49 is provided before the synthesis reactor 41, and the gaseous raw materials to be introduced into the synthesis reactor 41 are all adjusted in H2 / CO ratio through the second shift reactor 49 before entering the synthesis reactor.

[0028] By adjusting the H2 / CO ratio of the feed through the second shift reactor 49, the raw material composition of the synthesis reaction is optimized, which is beneficial to improving the selectivity of the synthesis reaction.

[0029] In summary, process A condenses the corresponding gas products through the condenser 45, separates the condensable components (such as tar, acetic acid, methanol, aldehydes, ketones, etc.), and sends the non-condensable gas to the combustion furnace 44 for combustion as fuel. The generated high-temperature flue gas can be heated by the boiler 46 or generate steam for power generation by the generator 47, thereby realizing the energy conversion and cascade utilization of the gas products.

[0030] Process B is to use the corresponding gas-phase product as the raw material of the synthesis reactor 41, adjust the H2 / CO ratio of the feed to an appropriate range through the second conversion reactor 49, combine with the supplementary hydrogen from the water electrolysis hydrogen production device 48, and carry out catalytic synthesis reaction in the synthesis reactor 41 to produce aviation fuel and / or hydrocarbon synthetic fuels such as methanol, thereby realizing the chemical conversion and high-value utilization of the gas-phase products.

[0031] In process C, the first shift reactor 42 mainly utilizes the water vapor shift reaction The carbon monoxide in the gas phase product is converted into hydrogen to increase the hydrogen content in the gas phase product. Subsequently, the pressure swing adsorber 43 utilizes the difference in adsorption capacity of different components on the adsorbent to selectively adsorb other gas components (such as CO2, CO, CH4, etc.) except hydrogen under high pressure. When the pressure is reduced, these components will be desorbed and precipitated to obtain high-purity hydrogen. This hydrogen can be used as a raw material for the synthesis reactor 41, together with other gas phase raw materials, and used to prepare hydrocarbon synthesis fuels after adjusting the H2 / CO ratio through the second conversion reactor 49.

[0032] The first shift reactor 42 and the second shift reactor 49 are both based on the water gas shift reaction The first conversion reactor 42 is mainly used to carry out a water-gas conversion reaction on the corresponding gas-phase products in process C to increase the hydrogen yield, in preparation for the subsequent separation and hydrogen production by the pressure swing adsorber 43; while the second conversion reactor 49 is used to adjust and optimize the H2 / CO ratio of various gas-phase raw materials that need to enter the synthesis reactor 41 (including the non-condensable gas from the condenser 45, the hydrogen from the water electrolysis hydrogen production device 48, etc.), so as to ensure that the composition of the raw materials entering the synthesis reactor meets the stoichiometric ratio requirements for the production of hydrocarbon synthetic fuels, thereby improving the selectivity and conversion efficiency of the synthesis reaction.

[0033] Generally speaking, the mass ratio of the first bamboo biomaterial to the second bamboo biomaterial is (30-70):(70-30); and the gasification treatment and the carbonization treatment are both carried out under an inert atmosphere.

[0034] Thus, the bamboo biomass raw materials can be reasonably distributed and reacted under an inert atmosphere, which not only ensures the yield of activated carbon and chemicals but also avoids the oxidation loss of raw materials.

[0035] Since multiple gas-phase products may enter the second conversion reactor 49, there are problems such as large fluctuations in the components entering the second conversion reactor 49, difficulty in control, unstable conversion rate, and difficulty in maintaining the product H2 / CO ratio. Therefore, the second conversion reactor part is also improved in an embodiment of the present invention in a bamboo activated carbon and bamboo-based chemical co-production equipment.

[0036] like Figure 2 As shown, the second conversion reactor part mainly includes two parts: one is the inlet pretreatment system, including the premixing buffer tank 410 and the gas analyzer 411 and the regulating valve 412 on each raw material input channel; the other is the main body of the second conversion reactor 49, which adopts a dual catalytic bed structure, with the upper part being the Fe-Cr catalyst bed 491 and the lower part being the Cu-Zn-Al catalyst bed 493, and a heat exchanger 492 arranged in the middle.

[0037] The premixing buffer tank 410 can homogenize the raw gas from different sources, monitor the gas components of each channel in real time through the corresponding gas analyzer 411, and then accurately control the gas ratio of each channel by the regulating valve 412 to ensure that the raw material composition entering the second shift reactor 49 is relatively stable. The second shift reactor 49 adopts a cascade catalytic system. The upper Fe-Cr catalyst 491 has strong activity and good thermal stability at a higher temperature (180-500°C), which can convert most of the CO; the middle heat exchanger 492 is used to adjust the temperature; the lower Cu-Zn-Al catalyst 493 performs deep conversion at a lower temperature (180-250°C), and has a strong anti-poisoning ability, which can further convert the remaining CO and improve the overall conversion efficiency.

[0038] Based on the above-mentioned bamboo activated carbon and bamboo-based chemical co-production equipment, a bamboo activated carbon and bamboo-based chemical co-production process is provided, the bamboo biological raw material is divided into a first bamboo biological raw material and a second bamboo biological raw material, and then the first bamboo biological raw material is gasified by a gasification reactor to obtain a first gas phase product, the second bamboo biological raw material is carbonized by a carbonization reactor to obtain a first solid phase product and a second gas phase product, the first solid phase product is activated by an activation reactor to obtain a second solid phase product and a third gas phase product, and the second solid phase product is bamboo activated carbon; the first gas phase product is used for at least one of process A and process B, the second gas phase product is used for at least one of process A and process B, and the third gas phase product is used for at least one of process A, process B and process C, the process A is to output the corresponding gas phase product as fuel, the process B is to use the corresponding gas phase product as a reaction raw material of a synthesis reactor to prepare hydrocarbon synthetic fuel, and the process C is to obtain hydrogen by passing the corresponding gas phase product through a first conversion reactor and a pressure swing adsorber in sequence.

[0039] As an optimization and / or instantiation of the above-mentioned co-production process of bamboo activated carbon and bamboo-based chemicals, the process A comprises condensing the corresponding gas phase product and delivering the condensed gas to the combustion furnace.

[0040] As an optimization and / or instantiation of the above-mentioned co-production process of bamboo activated carbon and bamboo-based chemicals, the condensed material after condensation is input into the synthesis reactor as a reaction raw material of the synthesis reactor.

[0041] As an optimization and / or instantiation of the above-mentioned bamboo activated carbon and bamboo-based chemical co-production process, the process A includes conveying the high-temperature flue gas generated by the combustion furnace to the boiler, then using the boiler for heat supply and / or steam power generation, and then using the electricity generated by steam power generation to electrolyze water to produce hydrogen.

[0042] As an optimization and / or instantiation of the above-mentioned co-production process of bamboo activated carbon and bamboo-based chemicals, at least a portion of the hydrogen produced by electrolysis of water to produce hydrogen is input into the synthesis reactor as a reaction raw material of the synthesis reactor.

[0043] As an optimization and / or instantiation of the above-mentioned co-production process of bamboo activated carbon and bamboo-based chemicals, the hydrocarbon synthetic fuel is aviation fuel and / or methanol.

[0044] As an optimization and / or instantiation of the above-mentioned co-production process of bamboo activated carbon and bamboo-based chemicals, the temperature of the gasification treatment is 700-1000°C; the temperature of the carbonization treatment is 300-600°C.

[0045] As an optimization and / or instantiation of the above-mentioned co-production process of bamboo activated carbon and bamboo-based chemicals, the activation treatment includes physical activation, and the physical activation uses one or more of water vapor, carbon dioxide or air as an activating agent.

[0046] As an optimization and / or instantiation of the above-mentioned co-production process of bamboo activated carbon and bamboo-based chemicals, the temperature of the activation treatment is 600-900°C.

[0047] As an optimization and / or instantiation of the above-mentioned co-production process of bamboo activated carbon and bamboo-based chemicals, a second conversion reactor is also provided before the synthesis reactor, and the gaseous raw materials to enter the synthesis reactor are all adjusted in the second conversion reactor to adjust the H2 / CO ratio before entering the synthesis reactor.

[0048] As an optimization and / or instantiation of the above-mentioned co-production process of bamboo activated carbon and bamboo-based chemicals, the mass ratio of the first bamboo bio-raw material to the second bamboo bio-raw material is (30-70):(70-30).

[0049] As an optimization and / or instantiation of the above-mentioned co-production process of bamboo activated carbon and bamboo-based chemicals, the gasification treatment and the carbonization treatment are both carried out under an inert atmosphere.

[0050] The above-mentioned bamboo activated carbon and bamboo-based chemical co-production process realizes the preparation of bamboo activated carbon by distributing bamboo biomass raw materials for gasification and carbonization treatment, and activating the carbonization products; at the same time, by using the first gas phase product, the second gas phase product and the third gas phase product produced by the gasification treatment, the carbonization treatment and the activation treatment for fuel output (process A), the preparation of hydrocarbon synthetic fuel (process B) and the preparation of hydrogen (process C), respectively, the comprehensive utilization of gas phase by-products is realized, the waste of resources is avoided, and the utilization efficiency of bamboo biomass raw materials is improved.

[0051] The above is a description of the relevant contents of the present invention. A person skilled in the art will be able to implement the present invention based on these descriptions. Based on the above contents of this specification, all other embodiments obtained by a person skilled in the art without making creative work should fall within the scope of the present invention.

Claims

1. A process for co-production of bamboo activated carbon and bamboo-based chemicals, characterized in that: The bamboo biomaterial is divided into a first bamboo biomaterial and a second bamboo biomaterial, and then the first bamboo biomaterial is gasified by a gasification reactor to obtain a first gas phase product, the second bamboo biomaterial is carbonized by a carbonization reactor to obtain a first solid phase product and a second gas phase product, and the first solid phase product is activated by an activation reactor to obtain a second solid phase product and a third gas phase product, wherein the second solid phase product is bamboo activated carbon; The first gas-phase product is used in at least one of process A and process B, the second gas-phase product is used in at least one of process A and process B, and the third gas-phase product is used in at least one of process A, process B and process C. Process A is to output the corresponding gas-phase product as fuel, process B is to use the corresponding gas-phase product as a reaction raw material of a synthesis reactor to prepare hydrocarbon synthetic fuel, and process C is to obtain hydrogen by passing the corresponding gas-phase product through a first conversion reactor and a pressure swing adsorber in sequence.

2. The process for co-producing bamboo activated carbon and bamboo-based chemicals according to claim 1, characterized in that: The process A comprises condensing the corresponding gas phase product and delivering the condensed gas to the combustion furnace.

3. The process for co-producing bamboo activated carbon and bamboo-based chemicals according to claim 2, characterized in that: The condensed material after condensation is input into the synthesis reactor as the reaction raw material of the synthesis reactor.

4. The process for co-production of bamboo activated carbon and bamboo-based chemicals as claimed in claim 2, characterized in that: The process A comprises delivering the high-temperature flue gas generated by the combustion furnace to a boiler, then utilizing the boiler for heat supply and / or steam power generation, and then using the electricity generated by the steam power generation to electrolyze water to produce hydrogen.

5. The process for co-production of bamboo activated carbon and bamboo-based chemicals as claimed in claim 4, characterized in that: At least a portion of the hydrogen produced by the electrolysis of water to produce hydrogen is input into the synthesis reactor as a reaction raw material of the synthesis reactor.

6. The process for co-production of bamboo activated carbon and bamboo-based chemicals as claimed in claim 1, characterized in that: The hydrocarbon synthetic fuel is aviation fuel and / or methanol.

7. The process for co-producing bamboo activated carbon and bamboo-based chemicals according to claim 1, characterized in that: The temperature of the gasification treatment is 700-1000°C; the temperature of the carbonization treatment is 300-600°C.

8. The process for co-production of bamboo activated carbon and bamboo-based chemicals as claimed in claim 1, characterized in that: The activation treatment includes physical activation, and the physical activation uses one or more of water vapor, carbon dioxide or air as an activating agent; and / or, the temperature of the activation treatment is 600-900°C.

9. The process for co-producing bamboo activated carbon and bamboo-based chemicals according to claim 1, characterized in that: A second shift reactor is provided before the synthesis reactor, and the gaseous raw materials to be introduced into the synthesis reactor are all adjusted in the H2 / CO ratio through the second shift reactor before entering the synthesis reactor.

10. The process for co-production of bamboo activated carbon and bamboo-based chemicals according to claim 1, characterized in that: The mass ratio of the first bamboo biomass raw material to the second bamboo biomass raw material is (30-70):(70-30); and / or, the gasification treatment and the carbonization treatment are both carried out under an inert atmosphere.

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