Nitrogen purity requirements of nitrogen generator

During the inspection and filling of nitrogen in the accumulator, attention should be paid to the safety of the accumulator as a high nitrogen compression container during maintenance and storage. It can only be filled with nitrogen. When the ambient temperature is 20 ℃ / 68 ℃, the standard pressure of accumulator is 55kg / cm2 / 780psl, and can not be overfilled with nitrogen. Precautions when filling nitrogen into the accumulator of PSA nitrogen plant, the pressure gauge must be used when filling nitrogen. When filling the accumulator with nitrogen, make sure whether the accumulator body is in good condition and whether the plug cover is fully tightened. Confirm whether the switch and relief valve of the pressure gauge are completely closed; screw off the plug on the accumulator and then tighten the charging valve; confirm whether the O-ring on the coupling device is installed properly; after removing the accumulator plug, connect it with the three-way valve and tighten the nut; connect the adapter and the three-way valve of the pressure gauge; slowly loosen the charging valve, The pressure gauge can display the accumulator pressure; when the air pressure reaches normal, close the valve clockwise; if the pressure is high, adjust the relief valve repeatedly to make the pressure drop; slowly open the relief valve to release the residual gas in the three-way method; remove the pressure gauge of KCN carbon loaded nitrogen purification equipment, and tighten the nut and plug.

The nitrogen filling method of accumulator is to tighten the hose joint and nut, install it on the nitrogen cylinder, and then connect the hose. After unscrewing the pressure gauge plug, connect it with the inflation hose, screw off the accumulator nut, close the inflation valve, check whether the O-ring is installed on the connector, and remove the plug, Tighten the nut of the coupler to confirm whether the adapter is connected with the pressure gauge, then loosen the charging valve of the accumulator, turn on the switch of nitrogen cylinder anticlockwise for flushing, inflate according to the charging pressure parameter table of accumulator, close the switch of nitrogen cylinder clockwise, tighten the charging valve of accumulator, loosen the overflow valve, and release the residual gas in the hose. After dismantling the inflatable hose, three-way valve and combiner, tighten the nut emergency plug and fully automatic nitrogen protective atmosphere push plate kiln. Carbon molecular sieve is a new type of adsorbent, which is widely used in air separation to produce nitrogen rich gas as the first choice adsorbent of pressure swing adsorption (PSA) air separation technology. In the next few years, carbon molecular sieve products will develop towards high index, high strength and high bulk density. Low index and low-grade products will be eliminated, and air separation equipment will tend to be miniaturized, which puts forward higher requirements for molecular sieve industry. The domestic market mainly adopts medium and low-grade carbon molecular sieves, with an annual total demand of more than 2000 tons. With the continuous development of China's economy, industry especially chemical industry With the continuous expansion of industrial scale, the demand level of carbon molecular sieve will increase year by year. With the continuous maturity of PSA technology, the application field of nitrogen generator is becoming wider and wider, and the international demand for carbon molecular sieve is also increasing. The demand of developed countries such as Europe and the United States is growing steadily every year. In recent years, the demand of developing countries is increasing by leaps and bounds. According to the analysis of international and domestic experts, the carbon molecular sieve industry presents the following Development trend:

First of all, with the continuous expansion of the use range of PSA nitrogen generator, the demand for carbon molecular sieve is increasing, which will further promote the development of the industry. In the next few years, this industry will become well known from a remote industry.

Secondly, with the improvement of application depth, the requirements of carbon molecular sieve such as nitrogen yield, nitrogen recovery rate, bulk density, compressive strength and other indicators are becoming higher and higher. Further improving the product performance index will be the major development trend of this industry in the future.

Thirdly, carbon molecular sieve is the main component of PSA nitrogen generator, and the cost accounts for more than 70% of the whole equipment. Therefore, reducing the cost will be an important condition to promote the development of the industry. Nitrogen generator and many air separation equipment production enterprises should also follow this market development law. However, the terminal victory is the fundamental to the success of nitrogen machine enterprises. Nitrogen has a wide range of uses in pharmaceutical industry, such as pure nitrogen isolation in bioengineering, nitrogen protection and pneumatic transportation in synthetic medicine, nitrogen filling and sealing in preparation production, etc. The purity of process gas is very important to improve the yield of electronic products and pharmaceutical products. Therefore, the requirements of process gas purity are very strict in microelectronic devices, medicine, biotechnology products and instruments. The requirements of nitrogen in drug production are used for injection filling, and the nitrogen produced by nitrogen generator is required to be free of dust and heat source; the purity of nitrogen in nitrogen making mechanism is required to reach 99% - 99.99%; nitrogen is required to be supplied at constant pressure during the production process to ensure the normal operation of production. The pressure of nitrogen in the nitrogen chamber will change due to the state of the steel drill rod. Before filling, the hammer should be put down first, and then the steel fiber should be completely leveled. Due to the impact of the piston, the steel fiber will drop suddenly, so the steel drill rod should be removed and then inflated. Because the nitrogen in the nitrogen chamber is in a high compression state, the nitrogen must be released first when replacing the bolt.