热风炉设计说明书

:Q2′=VmTrVgb(cg2tg2-cgete)=27383×1.4×2.28×1×(1.435×350-1.3933×25)=40855344.54KJ/周期。③化学不完全燃烧损失热量:Q3′=0KJ/周期。④煤气中机械水吸收的热量:Q4′=0KJ/周期。⑤冷却水吸收的热量:Q5′=2198513KJ/周期。⑥冷风管道散热量:Q6′=K(Δtf×Ai)Tf=62.8×50.33×438.1×0.75=107243.25KJ/周期。⑦炉体表面散热:Q7′=ΣK(Δtf×Ai)T=431385KJ/周期。⑧热风管道散热量:Q8′=3029374KJ/周期。⑨热平衡差值:ΔQ=ΣQ-(Q1′+Q2′+…+Q8′)=285.14-(218.81+40.86+0+0+2.2+0.10+0.43+3.03)=19.71GJ/周期。1.列热平衡表1.3。表1.3热平衡表热收入热支出项目燃料化学热燃料物理热助燃空气物理热冷风带入热量/GJ231.8114.2521.3017.79%81.305.007.476.24项目热风带出的热烟气带走的热化学不完全燃烧损失热量/GJ218.8140.8600%76.7414.3300的热量ΣQ285.14100.00煤气中机械水吸收的热量冷却水吸收热量冷风管道散热炉体表面散热热风管道散热热平衡差值ΣQ2.20.100.433.0319.71285.140770.040.151.066.91100.004.热效率计算(1)热风炉本体热效率:η1=[(Q1′-Q4+Q6′+Q8′)/(ΣQ-Q4)]×100%=[(218.81-17.79+0.10+3.03)/(285.14-17.79)]×100%=76.36%(2)热风炉系统热效率[(Q1′-Q4)/(ΣQ-Q4)]×100%=(218.81-17.79)/(285.14-17.79)×100%