6- Discussion on methods for demisting dust and tar-containing high-temperature coke oven gas, pyrolysis gas, and upgraded low-rank coal gas filters
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This post was last edited by luoli519 on 2023-10-3 at 18:15. The coke oven gas in my friend’s coking plant has a high temperature, requiring large amounts of circulating water to cool it down and recover coal tar; the spiral plate exchangers as well as the subsequent pipeline equipment are heavily covered with asphalt tar dust, resulting in very low heat exchange efficiency； Furthermore, the coal tar obtained contains too much dust. A friend told me that coal tar with a high dust content is of no use to companies. It’s intended for sale outside, with a very low price, and few people buy it. The company plans to handle it on its own; after much effort, it was found that coal tar and the suspended dust have similar densities, making it impossible to use effective methods to separate the dust from the heavy tar. Use a filter; dust and tar quickly clog the filters, and the replaced filters pile up like mountains, producing a strong unpleasant smell. A few years ago, they launched another project to upgrade low-grade coal. The temperature of the gas undergoing quality improvement is very high, and it also contains large amounts of dust, coal tar, and asphaltenes. Learning from the problems encountered when directly cooling coke oven gas to collect tar, they planned to install a separation and dust removal device that requires low operating and maintenance costs, has a long service life, and operates stably, before the coal tar capture and recovery unit; this device would be used to remove dust from the gas stream first, thereby preventing the tar recovered from containing large amounts of dust. Furthermore, it is planned to combine the coke oven gas from the existing old coking unit with the gas obtained from the upgrading of low-grade coal, and then separate dust first before recovering tar. Dear colleagues, could you share how you handle the coke oven gas containing dust and tar in your operations? How is the recovered dust-containing tar effectively treated? Please share your own solutions; different people have different views.
Industry challenges require comprehensive consideration; that is, measures such as filtering at the source are necessary as well! !
I believe that when coke oven gas is discharged, the preferred approach is to first use efficient and convenient dust and asphalt removal technologies to separate solid particles and gels. It can **reduce the amount of dust in the tar recovered through cooling in subsequent processes, as well as the costs associated with further treatment. On the Benhai Chuan forum at http://bbs.hcbbs.com/thread-1488997-1-1.html, I introduced a device called the \"axial-flow multi-factor swirl separator for parent-child separation\" which is used for dust removal and separation in high-temperature coke oven gas containing asphaltenes. Recently, several developers of gasification process packages and two owners of low-grade coal upgrading projects have inquired with me about this technology and equipment. Everyone can have in-depth discussions.
The core issue is whether your equipment is suitable for operating in high temperatures, and it must have long durability, because once the equipment is put into use, replacing it is almost impossible! !
The similar separation unit we provided for a large coal chemical enterprise in Ningxia is used for dust removal from the raw gas in gasification furnaces; it has a design temperature of 500°C and a design pressure of 4.8 MPag, and has been operating continuously and stably for over 4 years. There’s no need to worry about that.
This post was last edited by luoli519 on 2023-10-3 at 18:16. Additionally, the following professional discussion posts published by NOVEL Nuowei Energy Technology Company on the Hainan Chemical Industry Forum are listed here for everyone to use as links to join the discussions: 13. Discussion on improvements to the inlet devices of cyclone separators in gas-solid separation applications; please visit http://bbs.hcbbs.com/thread-1614524-1-1.html to participate in the discussion. 14. Regarding the issues arising from the use of swirl tube/swirl plate demisters in the wet flue gas desulfurization process for boilers, please visit http://bbs.hcbbs.com/thread-1599605-1-1.html to participate in the discussion.
This post was last edited by cumtbxum on 10-11-2016 at 10:27
This post was last edited by luoli519 on 2020-5-8 at 10:32. Shenhua Ningmei uses GSP powder gasification, which was developed in collaboration with Siemens. The applicable operating conditions for NOVEL Company’s G54 multi-factor cyclone mother-son separation technology are: gas handling capacity of 0~3 MMSCMPH, solid and liquid load of 0~15% (wt), design pressure of -0.1~45 MPa, and design temperature of -50~+650°C (without lining). Please visit https://bbs.hcbbs.com/thread-1354813-1-1.html or log in to www.novelseparationtech.com for more information.
This post was last edited by luoli519 on 2023-10-3 at 18:16. 35. Discussion on the removal of liquid sulfur foam in the SO2 production unit of the sulfolane plant: http://bbs.hcbbs.com/thread-1616252-1-1.html.
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 11:34. For discussions on measures to remove 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 related heat recovery and cooling processes, please visit http://bbs.hcbbs.com/thread-1617257-1-1.html. To be continued......