Tire nitrogen-filled pressure swing adsorption nitrogen equipment
1 Scope and characteristics
The special nitrogen generator for the rubber tire industry is suitable for nitrogen protection and molding in the vulcanization process of rubber and tire production. Especially in the production of all-steel radial tires, the new process of vulcanization with nitrogen has gradually replaced the steam vulcanization process. It has the characteristics of high purity of nitrogen, continuous production and high nitrogen pressure.
The key to tire competition in the 21st century is technology and price, and the price of tires is closely related to manufacturing process and technology. Hongbo PSA nitrogen equipment can help you win the competition.
In the traditional domestic process, steel radial tires use superheated water to shape and vulcanize the tires. The so-called superheated water vulcanization refers to the use of low-pressure steam for the shaping of the tire. During the positive vulcanization of the tire, the capsule (similar to the function of the mold) is filled with high-pressure hot water of 170 ° C or higher, and the external temperature is vulcanized with low-pressure steam; Nitrogen vulcanization refers to the use of low-pressure nitrogen (0.4-0.5 MPa) for the shaping of tires. During the vulcanization of the tires, the medium filled in the capsule is a mixed gas of high-pressure steam and high-pressure nitrogen (2.5 MPa), and the external temperature is vulcanized with low-pressure steam. Both methods use high temperature to change the molecular structure of the natural rubber chain into a network structure, and at the same time, the layers of the belt are tightly combined and form a pattern on the tread. Nitrogen vulcanization, tire performance indicators such as mileage, durability, uniformity, compression capacity test, are higher than the performance of traditional superheated water vulcanization. The purchase cost of nitrogen production equipment can recover all the investment in more than one year.
At present, some domestic radial tires for passenger cars have been widely used for nitrogen vulcanization as foreign countries.
The amount of nitrogen used in each car tire is about 1.25m3
The amount of nitrogen used in each truck tire is about 12m3
In general, nitrogen recovery is used to save nitrogen costs, and 40-50% of nitrogen recovery is usually considered.
2 working principle
Nitrogen generator uses air as raw material, high-quality carbon molecular sieve as adsorbent, and uses pressure swing adsorption principle (PSA) to selectively adsorb air by using microporous molecular sieve to achieve the purpose of oxygen and nitrogen separation. When the molecular sieve is pressurized, oxygen is preferentially adsorbed, and nitrogen is obtained from the non-adsorbed phase. This allows for the enrichment of nitrogen in the gas phase. Therefore, the carbon molecular sieve is used for the difference of the adsorption amount of oxygen and nitrogen in a certain period of time, and the automatic control software performs the pressure adsorption according to a specific time program, and the atmospheric pressure analysis cycle completes the oxygen-nitrogen separation, thereby obtaining high purity. Finished nitrogen.
3 performance characteristics
1. Process characteristics:
(1) The pressure swing adsorption nitrogen production equipment has the characteristics of wide application gas source, high product purity, simple process, high operation automation and low operating cost.
(2) Compressed air purification components have long service life and are easy to replace and easy to maintain.
(3) The nitrogen export equipment has a large outlet flow rate and the outlet pressure can be adjusted within the set range.
(4) It can be opened and stopped at any time according to the production situation.
(5) The product has high purity of nitrogen, and the purity of nitrogen can be achieved by pressure swing adsorption method >99.99%, no need to configure nitrogen purification equipment.
2. Technical design features:
(1) The unique molecular sieve compact packing technology and compaction device are used to avoid the phenomenon of molecular sieve pulverization caused by impacting molecular sieves in high-speed flow and improve the long-term reliability of the system.
(2) Scientific and reasonable process flow and equipment configuration, compact equipment, beautiful appearance and small footprint.
(3) Low operating cost of equipment, stable and reliable nitrogen purity and flow.
(4) Part of the air pretreatment equipment, each stage of the filter has a differential pressure indication, automatic sewage system.
(5) The equipment is connected and disassembled by standard parts, which is more convenient and convenient to install and maintain.
(6) The high-reliability imported program-controlled valve has a long service life and can meet the long-term stable operation requirements of the equipment.
(7) High degree of automation, using the microcomputer automatic program control system developed by our company, the equipment can be operated automatically, and the purity, pressure and flow of nitrogen can be adjusted as needed.
