高温移动床废轮胎与生物质直接热解制气性能研究

Study on properties of high temperature in-situ pyrolysis of waste tires and biomass for fuel gas in moving bed

对以不同比例组成的废轮胎与生物质均匀混合物在移动床内高温直接热解的制气性能进行了研究,考察了温度和废轮胎含量对产物产率、气体组分以及热值等影响。结果表明,温度对直接热解气产率和热值影响较大,温度越高,气体产率越大而热值越小;混合物中废轮胎含量增大,热解气中碳氢气体含量增多而含氧气体减少,气体产率逐渐减小而热值增大。温度升高,合成气(H2+CO)含量和H2/CO比值均增大;废轮胎含量增大,合成气(H2+CO)含量和H2/CO比值先增大后减小。当热解温度为1 000℃,废轮胎含量为35%时,热解产物中(H2+CO)含量最高为61%,且H2/CO的比值达到最大值为1.53,有利于作为工业合成气原料。同一温度下,混合物直接热解气热值远远高于生物质单独热解,说明废轮胎的掺入有助于优化热解气组成,提升燃气品质。

The property of in-situ pyrolysis of biomass and waste tire in a tubular moving bed was investigated, and the influence of temperature and waste tire content on product yield, gas composition and gas heating value was also studied. The results showed that the temperature could obviously affect the yield of pyrolysis gas and heating value. As for a certain composition of the mixture, the higher the temperature was, the greater the yield of pyrolysis gas got while the lower heating value was. The hydrocarbon gas increased and the oxygen-containing gas decreased, and the yield of pyrolysis gas declined while heating value rose as the percent of waste tire increasing. When the temperature rose, the syngas content of H2 and CO and the ratio of H2/CO increased; the syngas content of H2 and CO and the ratio of H2/CO increased and then decreased when the waste tire content increased.In the same temperature,the heating value of the pyrolysis gas of the mixture was greatly higher than that of biomass, it indicated that the addition of the waste tire contributed to optimizing the composition, promoting the quality of the fuel gas.