In order to prevent the low temperature gas leakage of the expander, reduce the refrigeration capacity of the expander, and cause the lubricating oil freezing accident of the expander bearing, the expander should have a tight shaft seal. At present, the commonly used shaft seal forms include labyrinth seal and graphite ring seal. In order to ensure that the lubricating oil does not leak and the cold air does not leak, the labyrinth seal is generally divided into two sections, with the seal gas flowing in the middle. The graphite sealed by graphite ring has self-lubricating function and small sealing clearance. However, in order to facilitate the disassembly and protection of graphite,. The graphite ring needs to be installed in the stuffing box.
The start-up, commissioning and stable operation of DEAR air separation equipment are not only related to the quality of the equipment itself, but also closely related to the level and experience of field operators. When problems are encountered on the site and conventional methods such as telephone and fax are used to seek technical support, due to the limited information transmitted, technical personnel are far away from the site, unable to fully and timely grasp the site operation, affecting the effective solution of the problem. Deere's remote internet technology is based on the on-site DCS technology, which develops a system for on-site DCS data acquisition, transmission through the internet, and remote real-time monitoring, so as to achieve timely and comprehensive access to on-site operating parameters at the remote end, and provide fast and timely technical support for the site.
