Procurement of cryogenic air separation equipment

Answer: the default unit gauge pressure is MPa (g), and the mainstream is cryogenic full low pressure external compression process. Design pressure of conventional energy-saving models in the industry: 0.50~0.55 MPa (g); The lower limit of stability of ordinary process is about 0.45 MPa (g). In general, it is not recommended to be lower than 0.42 MPa (g) for a long time in the conventional scheme. If the pressure is too low, there will be risks such as poor heat exchange in the precooling tower, insufficient purification of molecular sieve, difficult to balance the cooling capacity, and the air compressor close to the surge area. The internal compressed air is distributed with a booster. The main air compressor is mostly 0.55~0.65 MPa (g), and the lower limit is mostly 0.50 MPa (g), which is difficult to achieve below 0.45MPa (g). Deere air separation ultra-low discharge pressure patented energy-saving external compression air separation, through the collaborative optimization of the w

Answer:It can be done, and there is just a public 7500nm ³/h (80% o ɑ) VPSA benchmark project: Jiangyin Huaxi iron making VPSA project Parameters: 7500nm ³/h, 80% oxygen purity, vpsa-7500 specification, smelting oxygen enriched condition, BOT mode, supporting their own blue bank intelligent operation and maintenance system Background: This is the VPSA project publicly announced by Deere air separation. Previously, Deere's main business was cryogenic air separation, and VPSA is a new product line. Key point differentiation (very important) 1. the 7500 is a single set of VPSA adsorption tower group, not multiple sets in parallel; Purity 80%, blast furnace/iron making oxygen enriched standard working condition 2. Deere does not take VPSA as its main business, and cryogenic is its strength; VPSA molecular sieve is purchased 3. capability boundary: at present, VPSA performance is publicly disclosed, and there is no case of a larger single set (≥ 10000) VPSA being publicly put into operatio