Construction issues at the flue interface for waste heat recovery in coke ovens
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Our factory currently needs to recover and utilize the waste heat from the coke oven flues. Construction plans are currently being sought. As a manager, I have some understanding of the theory, but I don’t know which company has already carried out similar modifications or how the actual construction is done, so it’s difficult for me to evaluate their plans. I would appreciate some advice from those who have carried out similar modifications in factories. First, it is necessary to ensure that normal production is not affected; second, it must operate stably; third, the cost should be low. Thank you all for your help.
Waste heat recovery from coke oven flues has been implemented in many cases, such as at Shandong Jigang
I understand your question – you want to make holes in the main flue of the coke oven without stopping its operation, right! This is a very dangerous operation that can affect the production of the coke oven; therefore, during the hole-opening process, the coke oven must stop heating and its connection to the flue must be severed. Moreover, this type of work is carried out by professional engineers, and the operation time is kept as short as possible. Once the hole-opening is completed, it is essential to quickly reconnect all the pipes at that location! The coking plant of Hebei Handan Iron and Steel Company once made openings in its flue stacks; you can go there to learn from their experience!
The chimney temperature will decrease; pay attention to changes in suction
It’s easy to do – it takes 6-8 hours to insulate a coke oven. I’ve worked on opening holes in the flue pipes of 4 coke ovens in order to connect them to waste heat recovery systems; proper preparatory work is necessary beforehand
The second phase of Xuecheng Energy Project of Shandong Weijiao Group is under construction; you can go and take a look
What do you mean by danger? Additionally, regarding the issue of coke oven insulation: How is coke oven insulation carried out? Should the valves of the individual flue ducts be closed? If the coke oven is insulated, then no air will enter anymore, nor will any exhaust gases be released. In that case, if there are leaks in the coke oven, the gas concentration in the combustion chamber will increase. After the insulation process is completed, if air is introduced at that point, could there be a risk of explosion? Those who know, please let me know