The coking problem in the gasification furnace at Xinjiang Qinghua has been basically resolved
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The coking problem in the gasification furnace at Xinjiang Qinghua has been basically resolved. Author/Source: Date: 12-16-2015. Clicks: 73. Since the onset of winter, changes in coal quality have led to an excessively low steam-to-oxygen ratio; coupled with operational factors, this has resulted in widespread coking in the gasification furnace, disrupting normal production. To this end, the leaders of Xinjiang Qinghua Company and the gasification workshop took a series of measures, and after more than 20 days of intensive coking removal, the problem was basically resolved. The company formed a dedicated coking removal team; in addition to the gasification workshop, staff from the administrative office and other workshops were also sent to provide support. On the one hand, maintenance personnel are organized to clean the gasifier of coke as quickly as possible, with 5–6 people working continuously per shift. On the other hand, the workshop supervisors strictly monitor and guide the operation of the gasification process to prevent coking in the gasifier again. The workshop supervisor takes personal charge and carefully adjusts the oxygen-to-gas ratio as well as the operating conditions of the gasification furnace ； The workshop supervisor works the night shift ； The team members learn from their mistakes, turning those lessons into experience: they always check the coal before adding it, inspect the ash when discharging it, make adjustments promptly when there is slag, and report even minor adjustments. After more than 20 days of hard work, the coking problem in the gasification furnaces was basically resolved, and the furnaces affected by coking were put back into operation one by one. The twelve gasifiers currently in operation all have a load of around 5,500 nm3/h, and are essentially in a stable operating state. http://www.nmtech.com.cn/*nwen_qydt_xx.asp?path=54&id=174127
Personally, I think that since the root cause has not been identified, the methods used only address the symptoms rather than the underlying problem, and issues will continue to arise! :)
Why wasn’t the specific reason mentioned?
This problem seems to be quite common in the winters of the north. In addition to vaporization boilers, power plant boilers are also prone to such issues. Everyone is welcome to share their insights on this topic.
5500 Nm3/h? Is that a mistake?……
It should be the oxygen dosage; it’s probably similar! It’s definitely not at full capacity.
Thank you, moderator; it’s possible that’s the case.
Who knows the contact information for Qinghua’s Qinghai project?
No fundamental solution has been found; this issue can be resolved with more operational experience.
The biggest problem with slag formation in Qinghua furnaces is still the quality of coal