蒸馏装置的经济回流比

摘要为了建立蒸馏装置总偿付费用与回流比的关系式,本文首先对蒸馏的回流比与板数的关系式进行了探讨。根据Eduljee关系式建立了便于求解dN/dR的新回流比与板数的关系式: N_m/N=1-B[1-((R-R_m)/(R+1))~β] 并以该式与其它关系式进行了比较,在本文的计算范围该式的最大偏差为±9％。根据我国具体情况找到了蒸馏塔和热交换器的投资费用以及年运转费用与回流比的关系式,从而依据这些投资费用关系式建立了总偿付费用与回流比的关系式,表示如下: C_T=φ(R+1)~(μ/2){[1-B(1-((R-R_m)/(R+1))~β)]~(-1)+(H_sE)/(N_m·h}]+ω(R+1)~ε+Ψ(R+1) 将此式对R进行求导,并使之等于零,在计算机上用试差法就可求得经济回流比R_E的值。

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Abstract： In order to establish the correlation between total amortized investment cost of distillation unit and reflux ratio, the correlation between reflux ratio and number of plates will be the first to be discussed in this paper. The new correlation easy for solving dN/dR is established on the basis of Eduljee's correlation and is presented as follows Nm/N=1-B[1-(R-Rm/R+1)~β] This is compared with other correlations. The maximum deviation of this correlation covering the calculations in this paper is ±9%. Considering the situations in our country, we find separately the correlation of investment cost of distillation tower and heat exchangers versus reflux ratio and that of annuat operational cost versus reflux ratio. Then in terms of these cost correlations we can establish the correlation of total amortized investment cost versus reflux ratio and express it as follows C_T=φ(R+1)~(u/2){[1-B(1-R-Rm/R+1)~β]~(-1)+H_sE/N_mh}+ω(R+1)~ε+ψ(R+1) Differentiating this equation with respect to reflux ratio, we can solve for the economic reflux ratio (R_3) of distillation unit on a computer by trial-and-error method.

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Received 1988-01-15; published 1988-01-15

引用本文:

齐福来;.蒸馏装置的经济回流比[J]. 化学工业与工程, 1988,5(1): 1-13

Qi Fulai.Economic Reflux Ratio of Distillation Unit[J]. Chemcial Industry and Engineering, 1988,5(1): 1-13