9- Necessity of fin separators in the hydrogen recovery membranes of naphtha hydrogenation units & CTL units
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This post was last edited by luoli519 on 2023-10-3 at 17:56. The hydrogen recovery and purification process used in the company’s original reprocessing facility relied on PSA, or pressure swing adsorption, for treatment. However, due to the high content of C5+ hydrocarbon mist in the feed gas entering the PSA system, the PSA operates poorly, and the purity of the hydrogen produced often fails to meet the required standards. In particular, liquid hydrocarbons tend to accumulate within the tower and quickly saturate the adsorbent; on several occasions, bubble column phenomena occurred. This leads to frequent replacement of the adsorbent, resulting in high operating costs. The design team recommends installing an efficient vane separator for the feed gas at the front end of the PSA unit, in order to remove the hydrocarbon liquid droplets carried in the PSA feed gas and thus protect the PSA system. Now, the company is preparing to install another set of naphtha hydrogenation units, and it faces the same issue of selecting a method for hydrogen recovery and purification. Due to the aforementioned problems encountered with PSA pressure swing adsorption treatment for hydrogen recovery and purification in the reforming unit, this time everyone tends to opt for membrane systems for hydrogen recovery in the naphtha hydrogenation unit. So, can the use of membrane separation methods for hydrogen recovery avoid the problems encountered with the PSA method? In naphtha hydrogenation units, a membrane separation method is used to recover hydrogen; is it necessary to install a pre-protection separator? How should hydrogen recovery from the hydrogenation off-gases in coal-to-oil production be arranged under similar conditions? If a gas-liquid separator is also needed to remove liquid droplets and mist from the gas phase, what type of separator should be chosen? Please help with some advice.
This post was last edited by luoli519 on 2023-10-3 at 17:56. Additionally, the following professional discussion posts published by NOVEL Nuowei Energy Technology Company on the HaiChuan Chemical Forum are listed here for everyone to use as links to join the discussions: 14. Regarding the issues that arise when using swirl tubes/swirl plates demisters for wet flue gas desulfurization in boilers, please visit http://bbs.hcbbs.com/thread-1599605-1-1.html to participate in the discussion.
This post was last edited by luoli519 on 2019-6-8 at 14:26. Below is the technical exchange email sent to the owners regarding NOVEL and the topic of this post; please refer to it.
This post was last edited by luoli519 on 2023-10-3 at 17:57. Topic 36: Discussion on the setup of vane separators in the exhaust and intake systems of the vacuum pump in the sulfolane plant’s distillation unit, http://bbs.hcbbs.com/forum.php?mod=viewthread&tid=1616268.
37. Regarding the application of the C4 hydrocarbons/water coalescing separator in the MMA methyl methacrylate project, please visit http://bbs.hcbbs.com/thread-1617142-1-1.html to participate in the discussion. To be continued......
This post was last edited by luoli519 on 2017-1-16 at 11:50. For discussions on measures for removing liquid droplets from the flue gas resulting from the mixed combustion of waste gas from chlor-alkali plants and coke oven gas, as well as for heat recovery and cooling processes, please visit http://bbs.hcbbs.com/thread-1617257-1-1.html. To be continued......
40. Regarding the unstable operation of the alcohol synthesis unit in the **installation and the waste alkali liquid separator, which leads to problems in the subsequent coagulation separator, please visit http://bbs.hcbbs.com/thread-1620515-1-1.html to participate in the discussion. To be continued......
41. For discussions on the recovery and capture of caprolactam droplets and mist entrained in the high-vacuum exhaust stream of the distillation unit in caprolactam plants, please visit http://bbs.hcbbs.com/thread-1621905-1-1.html to participate in the discussion.
This post was last edited by luoli519 on 2023-10-3 at 17:57. Not only do PSA-based gas separation units require efficient gas-liquid demisting separators to be installed on their gas inlet pipelines, but membrane separation units also need such efficient gas-liquid demisting separators on their gas inlet pipelines. A methanol plant in Inner Mongolia uses membrane separation units in its recycle gas inert gas venting system to recover hydrogen, thereby producing CNG and LNG as by-products. This company requested NOVEL to design a vane separator for removing the liquid droplets carried in the air flowing into the membrane separation unit. The main reason is that the liquid droplets and mist carried by the membrane separation components significantly reduce the gas separation efficiency of the membrane module ； Furthermore, the foam droplets contain organic components, which have a significant impact on the lifespan of the separation membrane, leading to high operational and maintenance costs.
42. For solutions to the liquid presence at the inlet of the cycle hydrogen compressor in the NO reduction unit of the caprolactam plant, please visit http://bbs.hcbbs.com/thread-1622897-1-1.html to participate in the discussion.
43. Regarding the gas-liquid, gas-solid, gas-liquid-solid, and gas-liquid-liquid dynamic separators required for large-scale crude oil deep processing units, please visit http://bbs.hcbbs.com/thread-1623059-1-1.html to participate in the discussion.