OPERATION METHOD OF NITROGEN GAS MANUFACTURING APPARATUS

• Main Author: SAITO TATSUHISA
• Format: Patent
• Language: English; Japanese
• Published: 27.07.2023
• Subjects: CHEMISTRY; COMPOUNDS THEREOF; INORGANIC CHEMISTRY; METALLURGY; NON-METALLIC ELEMENTS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; SEPARATION; TRANSPORTING

To provide an operation method of a nitrogen gas manufacturing apparatus that can obtain product gas with required purity and reduce power consumptions.SOLUTION: An operation method of a nitrogen gas manufacturing apparatus, which has a plurality of adsorption towers filled with adsorbent and is configured so that the adsorption towers repeatedly perform at least an adsorption process, a pressure equalization process and a regeneration process to separate nitrogen from compressed air which is raw material gas and supply the gas as product gas, comprises a pausing process in which an implementation time of the adsorption process is extended as flow volumes of the extracted product gas reduce, and supply of the raw material gas to the adsorption towers and extraction of the product gas from the adsorption towers are paused, after the adsorption process is completed.SELECTED DRAWING: Figure 5 【課題】要求された純度の製品ガスが得られ、消費電力の低減が可能な窒素ガス製造装置の運転方法を提供する。【解決手段】吸着剤が充填された複数の吸着塔を有し、前記吸着塔が少なくとも吸着工程、均圧工程及び再生工程を繰り返し行って、原料ガスである圧縮空気から窒素を分離し、製品ガスとして供給する窒素ガス製造装置の運転方法であって、製品ガスの取出流量の減少に応じて前記吸着工程の実施時間を延長し、前記吸着工程の完了後に、前記吸着塔への原料ガスの供給及び前記吸着塔からの製品ガスの取り出しを停止する休止工程を設ける、窒素ガス製造装置の運転方法を選択する。【選択図】図５