Oxygen and electrolytes from the anode side are pumped into an oxygen separator, where oxygen separates with electrolytes under the effects of gravity, then oxygen passes through an oxygen cooler. There, the oxygen is cooled to a temperature of 30~425℃, where it then passes through an oxygen demister to remove liquid water from gas. The pressure of the system is raised to and maintained at a set value by means of a pressure regulation valve. The electrolytes at the bottom of the oxygen separator are pumped back to the oxygen cell of the electrolyser. After filtering and cooling, oxygen side circulation is finished.
According to the capacity and work pressure of a hydrogen generator, the handling capacity of its hydrogen purifier is determined. In order to guarantee the quality of hydrogen after purification, we use purified hydrogen as regeneration gas.
The total system includes a hydrogen generator, hydrogen purifier, electrical and control unit as well as a hydrogen buffer tank and a storage container. In this unit, water is decomposed into hydrogen and oxygen through electrolysis, for which the equation is 2H2O==2H2+O2. There is a hydrogen buffer tank between the hydrogen generator and hydrogen purification equipment; it is used to remove dissociative water from hydrogen and to keep the pressure of the hydrogen purification unit stable. Hydrogen flows into the purifier though this buffer. The purpose of purification equipment is to purify the generated hydrogen. The oxygen is removed through a chemical reaction under catalytic effects, and water is removed by way of adsorption.
The hydrogen from water electrolysis has the advantages of high purity and simple composition, and normally only has impurities such as oxygen and water. It is easy to purify the hydrogen to much higher purity levels for use in the electronic industry.
No comments:
Post a Comment