CAJ | 학술논문

针对等离子体煤裂解制乙炔过程，提出了将过程裂解气中副产的烃类分离，循环输入等离子体反应器的新型工艺流程。基于新疆天业2 MW示范平台装置的典型运行参数，采用热力学分析手段，理论上分析了该工艺流程对于体系乙炔产量、单位质量乙炔煤耗和裂解电耗等的影响。结果表明，裂解气烃类循环可以有效提高裂解气中乙炔浓度和产率，同时减少煤粉输送气等流程气体的使用。典型操作条件下，采用裂解气烃类循环工艺可以增加35.6%的乙炔收率和13.4%的氢气收率，降低30%的单位乙炔煤耗和裂解电耗，是高效可行的优化方案。
침대등리자체매렬해제을결과정，제출료장과정렬해기중부산적경류분리，순배수입등리자체반응기적신형공예류정。기우신강천업2 MW시범평태장치적전형운행삼수，채용열역학분석수단，이론상분석료해공예류정대우체계을결산량、단위질량을결매모화렬해전모등적영향。결과표명，렬해기경류순배가이유효제고렬해기중을결농도화산솔，동시감소매분수송기등류정기체적사용。전형조작조건하，채용렬해기경류순배공예가이증가35.6%적을결수솔화13.4%적경기수솔，강저30%적단위을결매모화렬해전모，시고효가행적우화방안。
Coal pyrolysis via thermal plasma provides an alternative path to realize the effective conversion from coal to acetylene. Recycling the hydrocarbons in the effluent gas to the plasma pyrolysis process is proposed in this work to improve the reactor performance. Thermodynamic analysis is made as the reference on the basis of the pilot-plant results of Xinjiang Tianye 2 MW plasma pyrolysis device. The comparison results show that the recycling of effluent hydrocarbons (except acetylene) can raise the volume fraction and mass flow rate of acetylene in the product gas. The hydrocarbons in cracked gas is ample to be used as the conveying and accelerating gas for coal and the protecting gas for plasma torch, which can reduce the input amount of working gas and optimize the whole gas flow of the process. Different optimization cases are discussed to compare the products (i.e., acetylene and hydrogen) output and the gas input of the thermal plasma pyrolysis system. The optimized results show that the recycling process is feasible and effective, with reduced coal consumption (30%) and pyrolysis energy consumption (30%) as well as increased acetylene yield (35.6%).