Answer: the technical requirements of molecular sieve purifier include:
1. the manufacture, inspection and acceptance of the molecular sieve adsorption cylinder should comply with "pressure vessel safety technology supervision regulations" and CB 150-1998 "steel pressure vessel", it should also comply with the provisions of "The design and manufacturing technical conditions of adsorber for large and medium-sized air separation plant.
2. the molecular sieve adsorption cylinder A, B class welding joints for 100% ray detection, quality should meet the JB/t4730-2005 "pressure equipment nondestructive testing" n level requirements, the penetration test of the weld seam of the socket and the barrel head meets the level I requirement of JB/t4730-2005.
3. After the equipment is manufactured, conduct the air pressure test with 0.69MPa (surface pressure), and then conduct the air tightness test with 0.6MPa (surface pressure). The test method is in accordance with gb150-1998 and relevant provisions.
4. Keep the inner part of the adsorption cylinder clean, dry and sealed, and fill the adsorbents on site. The lower layer is filled with alumina, and the upper layer is filled with molecular sieve.
5. Paint technology: sand blasting and derusting the outer surface, using inorganic zinc-rich paint as the base, painting twice, the thickness of the paint film is 40 UM each time, then apply aluminum powder organic silicon heat resistant paint, the thickness of the paint film is 20-25 um.
6. Add insulation layer under the absorption cylinder, and the thickness should meet the design requirements according to the material performance.
7. The inner wire mesh of the adsorption cylinder is evenly divided into four pieces of overlapping, the lower layer of the wire mesh is overlapping with each other, the upper layer of the wire mesh is overlapping with T-shaped steel, and the lap is riveted by rivets, and the overlapping of the wire mesh is no less than 100mm.
