$(14$ points$)$ In the countercurrent absorption$,$ clean water is used to absorb

ammonia from the coke oven gas. The concentration of ammonia is

$8g/$ standard $m^3,$ the mixed gas processing capacity is $4500$ standard $\frac{m^3}{h},$

the absorption rate is $95\%,$ and the amount of absorbent is $1\mathrm{.}5$ times the

minimum amount. The operating pressure is $101\mathrm{.}33$Kpa, the temperature is

$30C,$ and the gas$-$liquid equilibrium relationship is ${}^{**}=1\mathrm{.}2x.$ The total

volume absorption coefficient $K_{j}a$ of the gas phase is $0\mathrm{.}06$Kmo$\frac{l}{m^3*h},$ and

the empty tower gas velocity is $1\mathrm{.}2\frac{m}{s}.$ Calculate rhe tower height Z$.,$