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Dear masters, our factory has a small heating furnace with a load of 2.5 million kcal, but what we actually need is 3 million kcal. This furnace does not have an air preheater. If an air preheater is installed, can it meet the requirements? How much is the investment?
If you install an air preheater, it will not meet the landlord's requirements. Because the air preheater heats the air entering the heating furnace, it improves the recovery effect of flue gas waste heat and reduces the fuel consumption of the heating furnace. The furnace load is determined by design. To increase the load, the furnace must be redesigned and modified.
No, the air preheater uses the waste heat of the boiler exhaust gas to preheat the air, thereby improving thermal efficiency!
There are no technical parameters, so it is difficult to estimate.
Can you provide the process and materials of the convection section? What is the current exhaust smoke temperature? It should work!
This post was last written by zjy_007 on 2009-5-20 21:27 What parameters are needed for editing? Please submit.
The air preheater mainly improves the boiler efficiency and has little impact on the boiler load. If we use other means to increase the boiler output, it is still possible to increase it from 250 to 26 or 70, but your gap is too big and it is not easy to handle. And if the boiler is overloaded, it will not be good for the life of the boiler.
The air preheater only improves efficiency and has nothing to do with increasing load.
There will be a margin left when designing the heating furnace. Generally speaking, we will choose 1.2. Your current working conditions are 2.5 million kcal, 1.2x250=3 million kcal. Whether it is feasible or not requires you to provide the process parameters of your furnace for process accounting. Process parameters: Process medium distillation curve, medium inlet and outlet temperature, medium inlet pressure, pressure drop, furnace tube pipe form, burner layout form, burner specifications, fuel components, current exhaust gas temperature. Adding a preheater can reduce the exhaust gas temperature and improve the furnace efficiency, and has little impact on the furnace load. If you are interested, please contact me: fylyzt@126.com
The furnace load is set at the beginning of the calculation and generally cannot be changed. If you want to increase the load, you can 1. Use a better furnace tube with the same outer diameter and a thinner furnace tube to increase the circulation of the medium, for example: The conversion tubes of the reformer used to be made of HK-40 material, which were thick-walled tubes. Later, in order to expand capacity and increase production, the tubes were changed to HP50-MOD. This tube is a thin-walled tube, which increases the flow area. 2. If the process allows, increase the medium flow rate and increase the burner load