Hydrogenation dehydrogenation system and control method thereof

The invention discloses a hydrogenation dehydrogenation system and a control method thereof. The hydrogenation dehydrogenation system comprises a hydrogen/oil combination chamber, a hydrogen oil tank, a reaction chamber, a hydrogen purification chamber, a purification chamber, an impurity storage chamber and hydrogen utilization equipment, wherein the hydrogen using equipment power P and the hydrogen oil liquid level height h in the reaction chamber have the following relation: h = Pt/(rhoS * Wt% * eta Q), rho is the hydrogen density, S is the cross sectional area of the reaction chamber, Wt% is the mass ratio of hydrogen to hydrogen oil in the hydrogen oil mixture, eta is the effective conversion efficiency of hydrogen, Q is the heat value of hydrogen, and Q is the heat value of hydrogen. T is the time when the hydrogen flows from the reaction chamber to the hydrogen using equipment. Oil storage and hydrogen generated by hydrogen oil are purified, the hydrogenation and hydrogen using efficiency is improved,