Process $1$

Production of sodium sulphate can be produced by the reaction of sodium hydroxide and

sulphuric acid which is an exothermic reaction with the flow ratio $2$:$1.$ The sodium

hydroxide and the sulphuric acid streams shall be protected from back pressure flow.

This reaction releases heat and increases the temperature rapidly that may cause an

explosion risk if not being controlled. The heat must be immediately removed by the

cooling water system at specified flow rate. To ensure that the production of sodium

sulphate is optimum, the level of the substance inside the reactors shall remain at $80\%$

of the reactor volume. The output stream shall be regulated so that the level of the

substance in the reactor maintained at $80\%$ of the reactor volume.

draw the process flow diagrham

decide and place the most suitable valve $in$ each stream