Preheating with medium-pressure steam in delayed coking
Thread Content
Can 20 tons of medium-pressure steam meet the preheating requirements of the coke tower? What exactly should be done? What are the advantages and disadvantages? I earnestly beg experts to provide an answer!
It is all preheated using the oil from the production tower; the medium-pressure steam pressure is too high, and venting generates significant noise
Why use medium-pressure steam for preheating? How much water will that generate? Oil that has undergone oil and gas preheating and condensation can still be reprocessed, so isn’t it not considered waste?
But production fluctuations are quite large, and it has a significant impact on the equipment as well. And it has a particularly big impact on subsequent positions!
At present, only oil and gas preheating is feasible. I have experience in coking distillation operations; indeed, coking preheating has a significant impact on the distillation and stabilization processes, and it also adversely affects the balance of gases and steam in the system. Nevertheless, it can still be controlled, and certain experience is required – as long as the operations are adjusted promptly and appropriately. The greater the reduction in coking processing volume, the more pronounced this effect becomes; the opposite is true for larger processing volumes.
200 yuan per ton for medium-pressure gas – that’s too wasteful.
Firstly, from a safety perspective, it is unsafe to introduce pressurized steam into the coke tower; if the safety valve fails to relieve pressure, it can damage the equipment in the venting system. Secondly, improve the material of pipeline valves as part of the renovation efforts. In terms of facility performance, the cost-benefit ratio is not high, and it also tends to cause misoperations. Oil and gas preheating primarily involves advance adjustment of the distillation system and the effective use of advanced control systems. The other two furnaces and four towers are used for production to avoid small processing volumes. The absorption stabilization system should properly adjust the compressor, and the 3C system can be used for auxiliary adjustment.