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首页> 外文期刊>Fuel >Steam/oxygen gasification system for the production of clean syngas from switchgrass
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Steam/oxygen gasification system for the production of clean syngas from switchgrass

机译：蒸气/氧气气化系统，用于从柳枝production生产清洁的合成气

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A pilot-scale 25 kg/h fluidized bed, oxygen/steam blown gasifier and syngas cleaning system was developed to convert switchgrass into clean syngas. The system is rated for operation at gage pressures up to 1 bar. The reactor vessel incorporated a novel guard heating system to simulate near-adiabatic operation of large commercial-scale gasifiers, and was effective for gasification temperatures up to 900 ℃. After removing particulate from the gas stream via cyclones, a warm-gas cleaning operation based on oil scrubbing was used to remove tars. Sulfur compounds were removed via solid-phase adsorption. Ammonia was removed by water scrubbing. Baseline gasification tests with steam and oxygen were conducted at equivalence ratios (ER) between 0.21 and 0.38 using switchgrass as fuel. Measurements on the raw and cleaned syngas included permanent gas composition, C_2 hydrocarbons, water, heavy and light tars, gasification residues (char and ash), hydrogen sulfide (H_2S), carbonyl sulfide (COS), carbon disulfide (CS_2), ammonia (NH_3), and the first reported measurements of hydrogen cyanide (HCN) for oxygen/steam blown gasification. Heavy tars were removed with high efficiency by the method employed, although more difficult to remove light tars reduced overall tar removal efficiency to less than 80%. The sulfur scrubbing system demonstrated 99.9% removal efficiency, resulting in less than 200 ppb of H_2S in the cleaned gas. The NH_3 scrubbing system also accomplished greater than 99.9% removal efficiency, resulting in final NH_3 concentrations of less than 1 ppm.
机译：开发了中试规模的25 kg / h流化床，氧气/蒸汽吹气气化炉和合成气清洁系统，以将柳枝switch转化为清洁的合成气。该系统可在最高1 bar的表压下运行。该反应堆容器装有新颖的保护加热系统，可模拟大型商业规模气化炉的绝热运行，并且对于高达900℃的气化温度有效。在通过旋风分离器从气流中除去颗粒后，使用基于油洗的热气清洁操作除去了焦油。硫化合物通过固相吸附去除。通过水洗除去氨。使用柳枝as作为燃料，在蒸气比和氧气之间进行了基准气化测试，当量比（ER）在0.21和0.38之间。对原始和清洁的合成气进行的测量包括永久性气体成分，C_2碳氢化合物，水，重焦油和轻质焦油，气化残余物（炭和灰分），硫化氢（H_2S），羰基硫（COS），二硫化碳（CS_2），氨气（ NH_3），并首次报道了用于氧气/蒸汽吹气气化的氰化氢（HCN）的测量结果。尽管采用较难去除的轻质焦油将重焦油的去除率降低至低于80％，但采用较有效的方法去除了重焦油。硫磺洗涤系统显示出99.9％的去除效率，导致净化气体中的H_2S低于200 ppb。 NH_3洗涤系统还实现了大于99.9％的去除效率，最终NH_3的最终浓度小于1 ppm。

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