In order to control the speed of the turbine expander, make it run at the highest efficiency point, and prevent runaway, each turbine expander shall be equipped with a braking device. The commonly used braking forms include fan braking, motor braking and booster braking. The brake cost of the fan is low, and the operation is convenient, but the power cannot be recovered, and the noise is large. It is only used for the brake of small and medium-sized expanders; The motor brake has no noise and can recover power as electric energy, but the equipment cost is high. Only the large oxygen concentrator is equipped with a turbine expander with motor brake; The booster brake increases the inlet pressure of the expander and recovers the expansion work to the oxygen generator itself, which is a relatively advanced brake form.
Kaifeng DEAR Air Separation Industrial Co., Ltd. supplies the ultra-low pressure air separation equipment KDON (Ar) - 11000/2000/300 of Anyuan Special Steel Co., Ltd. of Anyang Iron and Steel Group. By installing a lift lift and a second lift lift in the transmission pipeline from the bottom to the top of the two-stage fractionator, the pressure in the gas-liquid mixing chamber is increased by using the gas in the high-pressure gas chamber, thus reducing the pressure drop of the liquid in the process of overcoming the rise of gravity, The exhaust pressure of the exhaust compressor is correspondingly reduced, and the energy consumption of the ultra-low pressure air separation unit is reduced. The setting of aluminum structured packing makes the exhaust pressure at the outlet of the exhaust compressor lower, thus further reducing the energy consumption of the air separation unit.
