Method for preparing hydrogen-rich gas by catalyzing biomass and co-producing and smelting coke

Abstract

The invention relates to the technical field of high-value utilization of object wastes, in particular to a method for preparing hydrogen-rich gas by catalyzing biomass and co-producing and smelting coke. The method comprises the following steps: crushing a biomass raw material into powder of which the particle size is less than 10mm for later use; the method comprises the following steps: crushing, calcining and activating smelting waste residues for later use; the method comprises the following steps: mixing biomass and smelting waste in proportion, and carrying out pyrolysis gasification treatment to obtain hydrogen-rich gas; and carrying out high-temperature carbonization treatment on the obtained gasified coke to obtain smelting coke. According to the method, biomass and smelting waste residues are utilized, two target products including high-quality hydrogen-rich gas and smelting coke are obtained in a pyrolysis gasification and carbonization treatment mode, the high-quality hydrogen-rich gas can be applied to the fields of chemical synthesis, fuel and the like, the smelting coke can replace coal coke and is applied to the iron and steel smelting industry, efficient utilization of biomass energy is achieved, and energy sources are saved. And carbon emission in the smelting industry is reduced.

Description

Technical Field

[0001] The invention relates to the technical field of high-value utilization of waste objects, and specifically to a method for catalyzing biomass to prepare hydrogen-rich gas and co-producing coke. Background Art

[0002] Among renewable energy sources, biomass resources have huge reserves and high utilization value. Its resource reserves rank fourth and have great potential in future energy development and utilization. Although biomass resources are widely distributed around the world, their development and utilization are low, and there is a lot of room for improvement in utilization. The current limited biomass processing technology level and policy support restrict the rapid development and utilization of biomass energy, resulting in a large amount of biomass resources not being effectively utilized, resulting in resource waste. The random discarding and stacking of biomass resources also causes serious environmental problems.

[0003] In the iron-making industry, a large amount of waste slag is generated during the smelting process. According to statistics, the annual output of steel smelting waste in my country is about 600 million tons, and the annual output of red mud exceeds 100 million tons. At present, there are still many practical problems in the treatment and utilization technology of these waste slags, and the treatment is difficult. Traditional treatment methods are not only energy-intensive, but also prone to secondary pollution and have adverse effects on the environment. In order to better solve this serious problem, it is urgent to explore cleaner and more effective ways of utilization. New utilization methods require more scientific and reasonable technical investment, which not only requires effective resource conservation and cost reduction, but also requires the ability to reduce adverse effects on the environment.

[0004] As a biomass treatment method, pyrolysis and gasification technology is regarded as an important way to enhance the utilization value of biomass. Many scholars have conducted multi-faceted research in this field. Through a series of pyrolysis, cracking and gasification reactions, biomass is converted into combustible gas components, bio-oil or biochar products. Compared with direct combustion, this method can not only effectively reduce pollutant emissions, but also obtain a variety of high value-added biological products. With the development of technology and the reduction of processing costs, this technology will have a wider application in the future. Smelting waste contains a variety of components, rich in iron, calcium and other elements. The presence of these components makes the smelting waste itself catalytically active, which can be used for biomass pyrolysis and gasification to prepare hydrogen-rich gas.

[0005] Coke is made from coal. Because it is widely used in the iron-making process, it has caused serious carbon emission problems. According to the requirements of my country's "dual carbon goals", it is necessary to reduce the use of coal coke and find suitable substitutes. As a carbon-rich energy source, biomass can be used to refine smelting coke and used in the steel smelting industry. According to the resource characteristics of biomass and smelting waste slag, smelting waste slag is used for biomass pyrolysis and gasification to prepare hydrogen-rich gas. At the same time, the solid matter (biochar), liquid residue (bio-oil) and smelting waste slag after pyrolysis and gasification are secondary carbonized to prepare biocoke to replace traditional coke. Through this process, biomass resources and smelting waste slag can be effectively utilized, biocoke replaces coal coke to reduce carbon emissions, and realizes the recycling of various waste resources.

[0006] Chinese patent CN118726494A discloses a biomass collaborative processing hydrogen production system and method, which pre-treats, anaerobic fermentation, purification, and pyrolysis and gasification of biomass to obtain pyrolysis gas containing hydrogen, carbon monoxide, and carbon dioxide. By combining anaerobic fermentation and pyrolysis and gasification, a variety of biomass raw materials can be processed collaboratively, and finally the mixed gas is separated by pressure change to purify hydrogen. Although this patent can obtain high-quality hydrogen-rich gas, the heat treatment will produce tar by-products and stick to the furnace, and it fails to provide an effective method for treating tar, and the steps are cumbersome and the processing cost is relatively high.

[0007] Chinese patent CN114763498B discloses a method and system for producing hydrogen by pyrolysis and gasification of biomass and co-producing biochar, wherein the biomass raw material enters a microwave pyrolysis reactor for pyrolysis to generate gaseous volatiles and biochar, the biochar is transported to a gasification reactor for reaction to obtain a biochar product, and the gaseous volatiles enter a reforming conversion reactor for reaction to obtain hydrogen. This method uses an alkaline absorbent to catalyze the reforming of volatiles to produce hydrogen, and the alkaline absorbent that is deactivated after the reaction needs to enter a combustion regenerator for regeneration, and the alkaline absorbent that is lost needs to be regularly replenished, which increases energy consumption and costs.

[0008] Chinese patent CN116536066A discloses a method for preparing high-strength biomass coke for blast furnace ironmaking. Biomass is used to prepare blast furnace ironmaking biomass coke, but the gas components in the biomass coke preparation process are not collected and analyzed, resulting in a waste of resources.

[0009] In summary, in order to achieve the dual-target product recovery and utilization of hydrogen-rich gas and smelting coke, a method for catalytic biomass to prepare hydrogen-rich gas and co-produce smelting coke was designed. Summary of the invention

[0010] To achieve the above object, the present invention provides the following technical solutions:

[0011] A method for catalyzing biomass to prepare hydrogen-rich gas and co-producing coke is provided, the method comprising the following steps:

[0012] S1 biomass is crushed and sieved to obtain treated biomass; smelting waste residue is crushed, calcined and impurities are removed, and activated to obtain treated smelting waste residue;

[0013] S2: the treated biomass and the treated smelting waste residue are mixed evenly according to a mass ratio, and placed in the front half of the pyrolysis gasification reactor to perform in-situ catalytic pyrolysis gasification; in the rear half of the pyrolysis gasification reactor, multiple layers of catalyst material are arranged in layers at equal distances, and the treated smelting waste residue is placed in equal mass to perform enhanced catalytic pyrolysis gasification to obtain reaction gas, tar, biochar and post-reaction smelting waste residue;

[0014] S3: condensing and recovering the tar in step S2, mixing it with the biochar and the smelting waste residue after the reaction, extruding it into a shape, and then putting it into a carbonization furnace for high-temperature carbonization treatment;

[0015] S4: After the high-temperature carbonization treatment in step S3, carbonization gas can be obtained; after the high-temperature carbonization treatment in step S3, coke can be obtained, which is the smelting coke.

[0016] Preferably, the biomass in S1 is agricultural waste, and the agricultural waste is a mixture of two of corn stalks, rice husks, cotton stalks and tobacco stalks, and the mixing mass ratio is 8-6:2-4; the smelting waste slag is a mixture of two of smelting dust ash, blast furnace slag, converter slag and red mud, and the mixing mass ratio is 3:7.

[0017] Preferably, the biomass in S1 needs to be crushed and sieved into particles with a particle size less than 10 mm.

[0018] Preferably, the smelting waste slag in S1 first needs to be crushed to a particle size of less than 5 mm, and then calcined at high temperature in an air atmosphere to remove impurities. The temperature of the high temperature calcination is 500-800° C., and the time of the high temperature calcination is 4 hours.

[0019] Preferably, the activation in S1 is acid activation, the acid used for the acid activation is one of formic acid, acetic acid, citric acid and oxalic acid, the acid concentration is 0.5-1 mol / L, and the immersion time is 0.5-1 h.

[0020] Preferably, after the acid activation is completed, a drying treatment is performed, and high-temperature calcination is performed in an air atmosphere. The temperature of the high-temperature calcination is 700-900° C., and the time of the high-temperature calcination is 2-4 hours.

[0021] Preferably, the mixed mass ratio of the treated smelting waste slag to the treated biomass in the in-situ catalytic pyrolysis gasification in S2 includes 0.5:1, 1:1, 1.5:1, and 2:1, and the temperature is 500-600°C; the treated smelting waste slag is added separately in the enhanced catalytic pyrolysis gasification, which is divided into three layers, and the mixed mass ratio of the treated smelting waste slag to the treated biomass includes 0.5:1, 1:1, 1.5:1, and 2:1, and the temperature is 800-900°C.

[0022] Preferably, the atmospheres of the in-situ catalytic pyrolysis and gasification and the enhanced catalytic pyrolysis and gasification in S2 are nitrogen and water vapor, the proportion of the water vapor is 5%-30%, and the reaction time of the pyrolysis and gasification reactor is 0.5-1h.

[0023] Preferably, the gas product obtained in S2 is rich in H2, CH4, CO, and CO2, and can be used as fuel gas or chemical synthesis gas raw material after separation and purification.

[0024] Preferably, the tar, the biochar and the post-reaction smelting waste residue in S3 are fully mixed with a mixing mass ratio of one of 0:1:0.8:0.1 and 0.2:0.7:0.1, stirred evenly, and prepared into 10 mm cubic blocks using molding equipment, and the cubic blocks are then placed in the carbonization furnace for carbonization treatment.

[0025] Preferably, the carbonization atmosphere in the carbonization furnace in S3 is nitrogen, the temperature is 1100-1300° C., and the carbonization time is 0.5-3 h.

[0026] Preferably, the carbonized gas in S3 can be used in combustion and chemical synthesis after separation and purification, and the smelting coke can be used to replace coal coke in the field of steel smelting.

[0027] Compared with the prior art, the present invention has the following beneficial effects:

[0028] 1. The present invention provides a method for catalytically preparing hydrogen-rich gas from biomass and co-producing smelting coke, which utilizes smelting waste slag to catalytically pyrolyze and gasify biomass. The smelting waste slag and biomass are mixed in the front half of the reactor for in-situ catalysis. Three layers of catalyst are arranged in the back half of the reactor, and the smelting waste slag is used to enhance the catalytic cracking of pyrolysis gas and tar to promote the formation of hydrogen-containing gas.

[0029] 2. During the carbonization preparation of smelting coke, the bonding property of tar is used to strengthen the combination between smelting waste slag and biochar, and promote the formation of biochar. The recycling of tar will greatly increase the utilization rate of the product and reduce the harm of tar to equipment and the environment. Smelting waste slag is used as aggregate for smelting coke as a skeleton structure to improve the strength of smelting coke.

[0030] 3. In a method provided by the present invention for catalyzing biomass to prepare hydrogen-rich gas and co-producing smelting coke, after biomass is used to produce high-quality hydrogen-rich gas, tar and biochar products are catalytically co-produced. By recycling tar, biochar and smelting waste residue, smelting coke is prepared to replace coal coke for use in the smelting industry, thus overcoming the problem that the by-products of previous biomass hydrogen production technology are difficult to utilize and cause secondary pollution. The smelting waste residue can be recycled to recover iron, thus promoting the reuse of solid waste. This technology couples the advantages of biomass hydrogen production technology and the advantages of smelting coke replacing coal coke to reduce carbon emissions, has good social and environmental benefits, and has broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a process flow chart of the present invention. DETAILED DESCRIPTION

[0032] The specific embodiments of the present invention are further described below. It should be noted that the description of these embodiments is used to help understand the present invention, but does not constitute a limitation of the present invention. In addition, the technical features involved in each embodiment of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0033] Specific reference Figure 1 The present invention provides a method for catalyzing biomass to prepare hydrogen-rich gas and co-produce coke. The technical scheme is as follows:

[0034] Example 1

[0035] S1 selected corn stalks and rice husks as biomass samples, crushed to less than 10 mm, and mixed at a mass ratio of 8:2. Smelting waste slag selected dust ash and red mud, crushed to less than 5 mm, mixed at a mass ratio of 3:7, calcined at 500 ° C for 4 hours. The smelting waste slag was treated with 0.5 mol / L formic acid for 0.5 hours, dried after impregnation and calcined at 700 ° C for 2 hours.

[0036] In the first half of S2, the in-situ catalysis was carried out, and the mixing mass ratio of smelting waste slag to biomass was 0.5:1, and the temperature was 500°C. In the second half of the enhanced catalytic gasification, smelting waste slag was added separately, which was divided into three layers. The mixing mass ratio of smelting waste slag to biomass was 0.5:1, and the temperature was 800°C. The pyrolysis gasification atmosphere was nitrogen and water vapor, with the volume proportion of water vapor being 5%. The pyrolysis gasification reaction time was 0.5h, and hydrogen-rich gas was obtained at the end of the reaction.

[0037] After pyrolysis and gasification of S3, tar, biochar and smelting waste residue are fully mixed with a mixing mass ratio of 0.1:0.8:0.1 and formed into 10 mm cubic blocks.

[0038] The carbonization atmosphere in the S4 carbonization furnace is nitrogen, the temperature is 1100°C, and the carbonization time is 0.5h. After the carbonization is completed, smelting coke and carbonization gas are obtained.

[0039] Example 2

[0040] S1 selected corn stalks and tobacco stalks as biomass samples, crushed to less than 10 mm, and mixed at a mass ratio of 7:3. Smelting waste slag selected blast furnace slag and red mud, crushed to less than 5 mm, mixed at a mass ratio of 3:7, calcined at 500 ° C, and calcined for 4 hours. The smelting waste slag was treated with 1 mol / L oxalic acid for 1 hour, dried after impregnation, and calcined at 800 ° C for 2 hours.

[0041] In the first half of S2, the in-situ catalysis was carried out, and the mixing mass ratio of smelting waste slag to biomass was 2:1, and the temperature was 500°C. In the second half of the catalytic gasification, smelting waste slag was added separately, which was divided into three layers. The mixing mass ratio of smelting waste slag to biomass was 2:1, and the temperature was 800°C. The pyrolysis gasification atmosphere was nitrogen and water vapor, and the volume proportion of water vapor was 5%. The pyrolysis gasification reaction time was 0.5h, and hydrogen-rich gas was obtained at the end of the reaction.

[0042] After pyrolysis and gasification of S3, tar, biochar and smelting waste residue are fully mixed with a mixing mass ratio of 0.2:0.7:0.1 and formed into 10 mm cubic blocks.

[0043] The carbonization atmosphere in the S4 carbonization furnace is nitrogen, the temperature is 1100°C, and the carbonization time is 0.5h. After the carbonization is completed, smelting coke and carbonization gas are obtained.

[0044] Example 3

[0045] S1 selected corn stalks and rice husks as biomass samples, crushed to less than 10 mm, and mixed at a mass ratio of 6:4. The smelting waste slag selected converter slag and red mud, crushed to less than 5 mm, and mixed at a mass ratio of 3:7. The smelting waste slag was calcined at 500°C and calcined for 4 hours. The smelting waste slag was impregnated with 0.5 mol / L acetic acid for 1 hour, dried after impregnation, and calcined at 700°C for 4 hours.

[0046] In the first half of S2, the in-situ catalysis was carried out, and the mixing mass ratio of smelting waste slag to biomass was 1:1, and the temperature was 500°C. In the second half of the catalytic gasification, smelting waste slag was added separately, which was divided into three layers. The mixing mass ratio of smelting waste slag to biomass was 1:1, and the temperature was 800°C. The pyrolysis gasification atmosphere was nitrogen and water vapor, and the volume proportion of water vapor was 10%. The pyrolysis gasification reaction time was 0.5h, and hydrogen-rich gas was obtained at the end of the reaction.

[0047] After pyrolysis and gasification of S3, tar, biochar and smelting waste residue are fully mixed with a mixing mass ratio of 0.1:0.8:0.1 and formed into 10 mm cubic blocks.

[0048] The carbonization atmosphere in the S4 carbonization furnace is nitrogen, the temperature is 1200°C, and the carbonization time is 1 hour. After the carbonization is completed, smelting coke and carbonization gas are obtained.

[0049] Example 4

[0050] S1 selected cotton stalks and corn stalks as biomass samples, crushed to less than 10 mm, and mixed at a mass ratio of 6:4. The smelting waste slag selected converter slag and red mud, crushed to less than 5 mm, and mixed at a mass ratio of 3:7. The smelting waste slag was calcined at 500°C and calcined for 4 hours. The smelting waste slag was treated by impregnation with 1 mol / L citric acid for 1 hour, dried after impregnation, and calcined at 800°C for 2 hours.

[0051] In the first half of S2, the in-situ catalysis was carried out, and the mixing mass ratio of smelting waste slag to biomass was 1.5:1, and the temperature was 600°C. In the second half of the catalytic gasification, smelting waste slag was added separately, which was divided into three layers. The mixing mass ratio of smelting waste slag to biomass was 1.5:1, and the temperature was 900°C. The pyrolysis gasification atmosphere was nitrogen and water vapor, with the volume proportion of water vapor being 20%. The pyrolysis gasification reaction time was 0.5h, and hydrogen-rich gas was obtained at the end of the reaction.

[0052] After pyrolysis and gasification of S3, tar, biochar and smelting waste residue are fully mixed with a mixing mass ratio of 0.1:0.8:0.1 and formed into 10 mm cubic blocks.

[0053] The carbonization atmosphere in the S4 carbonization furnace is nitrogen, the temperature is 1300°C, and the carbonization time is 2 hours. After the carbonization is completed, smelting coke and carbonization gas are obtained.

[0054] Example 5

[0055] S1 selected cotton stalks and tobacco stalks as biomass samples, crushed to less than 10 mm, and mixed at a mass ratio of 6:4. The smelting waste slag selected converter slag and red mud, crushed to less than 5 mm, and mixed at a mass ratio of 3:7. The smelting waste slag was calcined at 800℃ and calcined for 4 hours. The smelting waste slag was treated by impregnation with 1 mol / L citric acid for 1 hour, dried after impregnation, and calcined at 900℃ for 4 hours.

[0056] In the first half of S2, the in-situ catalysis was carried out, and the mixing mass ratio of smelting waste slag to biomass was 2:1, and the temperature was 500°C. In the second half of the catalytic gasification, smelting waste slag was added separately, which was divided into three layers. The mixing mass ratio of smelting waste slag to biomass was 2:1, and the temperature was 900°C. The pyrolysis gasification atmosphere was nitrogen and water vapor, and the volume proportion of water vapor was 30%. The pyrolysis gasification reaction time was 1h, and hydrogen-rich gas was obtained at the end of the reaction.

[0057] After pyrolysis and gasification of S3, tar, biochar and smelting waste residue are fully mixed with a mixing mass ratio of 0.2:0.7:0.1 and formed into 10 mm cubic blocks.

[0058] The carbonization atmosphere in the S4 carbonization furnace is nitrogen, the temperature is 1300°C, and the carbonization time is 2 hours. After the carbonization is completed, smelting coke and carbonization gas are obtained.

[0059] According to the test results, the main components of the pyrolysis gasification gas and the carbonization gas are shown in Table 1. In the pyrolysis gasification gas, it can be found that the proportion of hydrogen and methane in Example 1 and Example 3 is low, but after the preferred Example 2, Example 4 and Example 5, the total proportion of hydrogen and methane exceeds 50%, reaching a maximum of 73.59%, which promotes the formation of hydrogen-rich gas. In the carbonization gas, it can be found that the proportion of hydrogen and methane in Example 1 is low, but after the preferred Example 2, Example 3, Example 4 and Example 5, the total proportion of hydrogen and methane gradually increases, reaching a maximum of 51.17%, which promotes the formation of hydrogen-rich gas.

[0060] Table 1 Volume ratio of main components of gas after pyrolysis, gasification and carbonization

[0061]

[0062]

[0063] The relevant properties of the smelting coke in the above five embodiments are evaluated according to the metallurgical coke evaluation index in the national standard GB / T 1996-2017. The main evaluation indexes in the national standard can be seen in Table 2, and the test results of the embodiments can be seen in Table 3. The results show that the smelting coke of Example 1 has average performance, but the performance of the smelting coke obtained in the preferred embodiments 2, 3, 4 and 5 is significantly improved, and many indicators reach the third-grade coke standard, and some indicators reach or are close to the second-grade indicator standard, which has the potential to replace coal coke.

[0064] Table 2 Main evaluation indicators of metallurgical coke in national standards

[0065]

[0066]

[0067] Note: The percentage sign indicates mass fraction.

[0068] Table 3 Example smelting coke test results

[0069]

[0070] Note: The percentage sign indicates mass fraction.

[0071] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for catalyzing biomass to prepare hydrogen-rich gas and co-produce coke, characterized in that: The method comprises the following steps: S1 biomass is crushed and sieved to obtain treated biomass; smelting waste residue is crushed, calcined and impurities are removed, and activated to obtain treated smelting waste residue; S2: the treated biomass and the treated smelting waste residue are mixed evenly according to a mass ratio, and placed in the front half of the pyrolysis gasification reactor to perform in-situ catalytic pyrolysis gasification; in the rear half of the pyrolysis gasification reactor, multiple layers of catalyst material are arranged in layers at equal distances, and the treated smelting waste residue is placed in equal mass to perform enhanced catalytic pyrolysis gasification to obtain reaction gas, tar, biochar and post-reaction smelting waste residue; S3: condensing and recovering the tar in step S2, mixing it with the biochar and the smelting waste residue after the reaction, extruding it into a shape, and then putting it into a carbonization furnace for high-temperature carbonization treatment; S4: After the high-temperature carbonization treatment in step S3, carbonization gas can be obtained; after the high-temperature carbonization treatment in step S3, coke can be obtained, which is the smelting coke.

2. The method of catalyzing biomass to prepare hydrogen-rich gas and co-producing coke according to claim 1, characterized in that: The biomass described in S1 is agricultural waste, and the agricultural waste is a mixture of two of corn stalks, rice husks, cotton stalks and tobacco stalks, and the mixed mass ratio is 8-6:2-4; the smelting waste slag is a mixture of two of smelting dust ash, blast furnace slag, converter slag and red mud, and the mixed mass ratio is 3:

7.

3. The method of catalyzing biomass to prepare hydrogen-rich gas and co-producing coke according to claim 1, characterized in that: The biomass described in S1 needs to be crushed and screened into particles with a particle size of less than 10 mm.

4. The method of catalyzing biomass to prepare hydrogen-rich gas and co-producing coke according to claim 1, characterized in that: The smelting waste slag in S1 first needs to be crushed to a particle size of less than 5 mm, and then calcined at high temperature in an air atmosphere to remove impurities. The temperature of the high-temperature calcination is 500-800° C., and the time of the high-temperature calcination is 4 hours.

5. The method of catalyzing biomass to prepare hydrogen-rich gas and co-producing coke according to claim 1, characterized in that: The activation in S1 is acid activation, the acid used for the acid activation is one of formic acid, acetic acid, citric acid and oxalic acid, the acid concentration is 0.5-1 mol / L, and the immersion time is 0.5-1 h.

6. The method of catalyzing biomass to prepare hydrogen-rich gas and co-producing coke according to claim 5, characterized in that: After the acid activation is completed, a drying treatment is performed, and high-temperature calcination is performed in an air atmosphere. The temperature of the high-temperature calcination is 700-900° C., and the time of the high-temperature calcination is 2-4 hours.

7. The method of catalyzing biomass to prepare hydrogen-rich gas and co-producing coke according to claim 1, characterized in that: The mixed mass ratios of the treated smelting waste slag and the treated biomass in the in-situ catalytic pyrolysis gasification described in S2 include 0.5:1, 1:1, 1.5:1, and 2:1, and the temperature is 500-600°C; the treated smelting waste slag is added separately in the enhanced catalytic pyrolysis gasification, which is divided into three layers, and the mixed mass ratios of the treated smelting waste slag and the treated biomass include 0.5:1, 1:1, 1.5:1, and 2:1, and the temperature is 800-900°C.

8. The method of catalyzing biomass to prepare hydrogen-rich gas and co-producing coke according to claim 1, characterized in that: The atmospheres of the in-situ catalytic pyrolysis and gasification and the enhanced catalytic pyrolysis and gasification in S2 are nitrogen and water vapor, the proportion of the water vapor is 5%-30%, and the reaction time of the pyrolysis and gasification reactor is 0.5-1h.

9. The method of catalyzing biomass to prepare hydrogen-rich gas and co-producing coke according to claim 1, characterized in that: The tar, biochar and the post-reaction smelting waste residue in S3 are fully mixed in a mixing mass ratio of one of 0:1:0.8:0.1 and 0.2:0.7:0.1, stirred evenly, and prepared into 10 mm cubic blocks using a molding device, and the cubic blocks are then placed in the carbonization furnace for carbonization treatment.

10. The method of catalyzing biomass to prepare hydrogen-rich gas and co-producing coke according to claim 1, characterized in that: The carbonization atmosphere in the carbonization furnace in S3 is nitrogen, the temperature is 1100-1300° C., and the carbonization time is 0.5-2 h.

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