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在自由落下床中对稻草、神府烟煤、凤矿无烟煤以及稻草与两种煤的混合物进行高温快速共热解试验,考察不同热解温度、不同稻草质量掺混比下稻草与煤共热解过程中的协同作用。研究结果表明:随着稻草质量掺混比的增大,热解气总产率逐渐增大,热解焦产率逐渐减小;热解产物产率的实际值与理论值不同,800℃共热解时焦油产率高于理论值,协同作用促进焦油的生成;1000~1400℃时气体总产率高于理论值,协同作用促进气体的生成;在800℃时热解气中CO的生成受到抑制,高于1000℃时,共热解促进CO、H_2的生成。稻草与神府烟煤共热解焦的反应活性明显高于稻草与凤矿无烟煤共热解焦;当稻草质量掺混比为40%、60%时共热解焦活性降低,当稻草质量掺混比大于60%时,共热解焦的反应活性则逐渐提高。
In the free-fall bed, straw, Shenfu bituminous coal, Fengfeng anthracite, and mixture of straw and two kinds of coal were subjected to high-temperature rapid co-pyrolysis test. The effects of different pyrolysis temperature, straw and coal co- Synergy in the process. The results showed that with the increase of the blending ratio of rice straw, the total yield of pyrolysis gas increased gradually, and the yield of pyrolysis coke decreased gradually. The actual value of pyrolysis product yield was different from the theoretical value. The tar yield was higher than the theoretical value during pyrolysis, and the synergistic effect promoted the formation of tar. The total gas yield was higher than the theoretical value at 1000 ~ 1400 ℃, which synergistically promoted the formation of gas. At 800 ℃, CO formation in pyrolysis gas Is inhibited, higher than 1000 ℃, the total pyrolysis promote the formation of CO, H_2. The total pyrolytic coke reactivity of straw and Shenfu bituminous coal was significantly higher than that of straw and Fengmian anthracite coal. When the blending ratio of straw was 40% and 60%, the total pyrolytic coke activity decreased. When the ratio is more than 60%, the re-pyrolysis reaction gradually increases.