It is not difficult to see from the composition of PSA nitrogen making machine that the stability is affected by the following two points:

1, control valve:

In terms of pressure swing adsorption nitrogen making machine, the valve is necessary to have the following functions:

a) The material function is good, certainly no air leakage;

b) Complete the on or off action within 0.02 seconds of receiving the control signal; (Baode valve ≤0.2s, domestic valve ≤0.3s)

c) Can accept frequent opening and closing to ensure long service life; (Baode more than 5 million times, domestic more than 3.5 million times)

1.1, nitrogen machine equipment valve root problems

Normal use of the case, each programmed valve in each cycle (about 120 seconds) is necessary to switch once, according to the nitrogen machine 300 working days a year, 24 hours a day continuous movement, adsorption and desorption cycle of 4 minutes, then each valve needs to open and close more than 200,000 times a year. If only one valve is faulty, it will affect the normal operation of the whole equipment. Therefore, the continuous service life of the valve is the most important part of the stability and reliability of the nitrogen machine.

2, carbon molecular sieve is the center of the transformer nitrogen machine:

2.1. Functional objectives of carbon molecular sieve for nitrogen equipment:

a. Hardness

b. Nitrogen production (Nm3/T-h)

c. Recovery rate (N2/Air) %

d. Filling density (650-680kg/m³)

The above target carbon molecular sieve manufacturers have been indicated at the factory, but can only be used as reference data, how to make the carbon molecular sieve carry forward the maximum efficiency, which is directly related to the skill process of each nitrogen manufacturer and the ratio of the adsorption tower height to diameter, and ensure the service life of the molecular sieve is very careful:

2.2. Carbon molecular sieve loading skills:

It is necessary to have special filling skills when carbon molecular sieve is loaded into the adsorption tower, otherwise it is very simple powder and cause failure, from the technical process we can find that when the compressed air enters from the bottom of the adsorption tower at high speed, if there is no special gas disperser, the molecular sieve is subjected to the strong impact of the air flow, conflict, simple formation of molecular sieve powder. Other molecular sieves filled into the adsorption tower is not sure tight, after a period of use, the empty space between the molecular sieves is decreasing, slowly sinking, if there is no molecular sieve to actively fill the equipment and compaction equipment, the upper part of the adsorption tower will show significant space. When the compressed air enters the lower part of the adsorption tower, the molecular sieve will have a rapid displacement in a short time under the impact force of the air flow, resulting in the molecular sieve bumping, conflict and the adsorption tower wall, which simply makes the molecular sieve powder failure. (Traditional snowstorm and mechanical vibration packing)

2.3. The effect of oil and water in the air on molecular sieve:

Because the air contains a certain amount of water and oil vapor, after passing through the compressor, if it is not subjected to severe air purification treatment, the oil vapor is simply adsorbed by the carbon molecular sieve, and it is difficult to desorption, and the molecular sieve pore size is stuffed, resulting in the molecular sieve "poisoning" failure. Therefore, setting up strict air purification equipment before compressed air enters the adsorption tower is an indispensable part of ensuring the service life of molecular sieve. Although water is not fatal to molecular sieve, it will make molecular sieve adsorption "load" added, that is, affect its ability to adsorb O2 and CO2, so compressed air drying water removal is to improve molecular sieve adsorption ability and stability can not ignore the question.

Economy and environmental protection

PSA technology is a simple nitrogen production method, using air as the material, the energy consumption is only the electric energy consumed by the air compressor, with low operating cost, low energy consumption, and advanced power advantages.

1. Mechanical and electrical integration design to complete active operation

Imported PLC control full active operation. Nitrogen flow pressure purity can be adjusted and continuously displayed, can set pressure, flow, purity alarm and complete long-distance active control and detection and measurement, complete real unmanned operation. The advanced control system makes the operation easier, can complete unattended and long-distance control, and can monitor various working conditions in real time, and then ensure the gas purity and flow stability.

2. High-quality components ensure stable and reliable operation

Pneumatic valves, electromagnetic pilot valves and other key parts are imported equipment, reliable operation, fast switching speed, service life of more than one million times, low fault rate, convenient maintenance, low maintenance costs.

3. The nitrogen active emptying system fails

The low-purity nitrogen in the early stage of startup is actively drained, and the gas is pumped after reaching the target.

4. Purity of ambition select scale

Nitrogen purity conditioning convenience can be adjusted between 79% and 99.99% according to the needs of users, coupled with the common purification skills in the post-stage series nitrogen purifier, can produce 99.9995% of high purity nitrogen.

5. System common loop switching skills

The valve wear is reduced, the service life of the equipment is extended and the maintenance cost is reduced.

HTH hydrogenation type nitrogen purification equipment

Skill characteristics: Under the action of catalyst, nitrogen and a small number of hydrogen sources are passed into the system. After removing residual oxygen, excess hydrogen is removed, and impurities, water and dust in nitrogen are removed through the fine filter of the purified adsorption dryer to obtain high-purity nitrogen. High purity nitrogen skill target can reach O2≤2PPm H2≤3PPm.