Small and medium-sized pressure swing adsorption oxygen generator/concentrator for pulp oxygen bleaching

NegotiableUpdate on 04/28

Model

Nature of the Manufacturer: Producers

Product Category

Place of Origin

Online Consult

Overview

Oxygen bleaching is a widely used clean bleaching process in the pulp industry. Pulp companies equip the bleaching section with oxygen production equipment, and the oxygen rich produced is used for bleaching sections such as oxygen removal, delignification, and whitening in pulp production. At present, the vast majority of pulp companies that have achieved good results in oxygen bleaching use pressure swing adsorption (VPSA) for oxygen production.

Product Details

The oxygen production capacity of general pulp enterprises is between 200-3000Nm3/h, and the oxygen purity requirement is around 93%. VPSA oxygen production technology has significant advantages compared to other oxygen production technologies under such oxygen demand. The VPSA oxygen production technology of Peking University Pioneer has low investment costs, saves electricity consumption, is easy to operate, and has flexible control. It not only has rich engineering performance in China, but also exports to paper companies in multiple countries such as Belarus, Thailand, and Indonesia. The equipment has been running stably for many years, achieving customer satisfaction and establishing a good brand reputation.

Adsorption process:

The raw air is pressurized and sent into the adsorption tower using a blower. Impurities such as nitrogen are preferentially adsorbed by the molecular sieve, while oxygen is enriched at the top of the adsorption tower and enters the pressure equalization buffer tank to supply oxygen downstream.

Desorption process:

After the molecular sieve is saturated with adsorption, switch the valve to reverse the action of the blower to evacuate and restore the adsorption capacity of the molecular sieve. At this stage, oxygen is continuously supplied downstream from the pressure equalization buffer tank.

Technical features and advantages

Single tower process:

The single tower process effectively replaces the traditional two tower process, with fewer equipment, more stable operation, more convenient operation, and easier maintenance.

Efficient lithium based molecular sieve:

The third-generation high-efficiency lithium based oxygen producing molecular sieve (PU-8) has a lithium ion exchange rate of over 99%. It has the advantages of high strength, high nitrogen oxygen selectivity, high bulk density, uniform particle size, and long service life. Combined with proprietary automated filling technology, it effectively ensures the stability of the molecular sieve bed.

Oxygen valve:

Oxygen production valves are more suitable for VPSA oxygen production processes, with characteristics such as good sealing, fast switching speed, and stable performance. Their advantages of low failure rate and simple maintenance are more prominent.

Modular integrated design:

Compared with the conventional two tower process, the equipment is more compact, and the footprint can be saved by more than 20%.

Low operating costs:

The unit oxygen power consumption is as low as 0.35kwh/Nm3, and the annual maintenance cost can be reduced by 30%. Compared with ordinary oxygen concentrators or purchasing liquid oxygen, the annual comprehensive operating cost can be saved by more than 50%.