Scheme selection for central heating projects
Thread Content
The company is planning to enter the field of centralized heating projects in industrial parks and would like to seek advice from everyone. For 4*50t/h circulating fluidized bed units (1 unit is planned for the future, with 3 units in the short term), a new heat generation plant will be built from scratch; how should the auxiliary equipment be selected to ensure smooth operation in the future? Specific examples: What is the layout of the coal storage area (with a planned storage capacity of 6,000 tons)? Coal unloading/stacking methods, coal feeders, coal crushers, screening equipment, coal bins in front of the furnace, slag coolers, etc. I found many articles online before; they often mentioned that issues such as poor coal crushing, coal feeding, and slag discharge would affect the normal and stable operation of the system. What are the currently mature solutions that offer relatively good cost-effectiveness? Are things like toothed roller coal crushers, cross-screening systems, and drum slag coolers reliable?
We use bag filters for dust removal, pneumatic conveying, in-furnace desulfurization, and SNCR for nitrogen oxide removal. We are specialized in the design and manufacture of boiler dust removal and ash handling systems. We hope to have the opportunity to work together with you. Based on the capacity of your boiler, we developed heating auxiliary equipment for an industrial park last year; you can visit that site for a inspection. Our contact number is 13852998003, and our QQ account is 32539939
For one-on-one messages, contact gjn1970 at http://bbs.hcbbs.com/thread-980977-1-1.html
Why do you use fluidized-bed boilers for your central heating project? Is it because of the quality of the coal? Still going with the trend! If the coal quality is good, coal powder or strip boilers can be used; the overall efficiency of these two combustion methods is better than that of fluidized beds, and they are also safer and more reliable. Additionally, carbon molecular vaporization combustion technology can also be employed. For the same type of coal, this new technology reduces power consumption during operation by 60% compared to fluidized bed systems, while also avoiding wear and tear, all while meeting environmental standards ； 50% lower than coal powder ； 30% lower than a strip furnace.
Fluidized bed boilers can employ internal desulfurization, by feeding limestone into the furnace for desulfurization; this approach results in lower construction costs and operational maintenance expenses compared to external desulfurization
Now, coal imports have been banned in many areas, mainly due to concerns over environmental impact.
A chemical industrial park can still have its own thermal power generation facilities, with heating as the main purpose and power generation as a secondary function
Fluidized-bed boilers can employ in-furnace desulfurization, but they still represent a direct coal combustion technology; desulfurization takes place in an oxygen-rich environment, the calcium-sulfur ratio is high, and significant resource consumption occurs. Vaporization combustion of carbon molecules employs source control to prevent pollution (desulfurization under oxygen-deficient conditions, with a calcium-sulfur ratio of around 1), resulting in environmental treatment costs that are 80% lower than those of fluidized bed systems.
Most coal-fired thermal power plants in Beijing have been shut down, with only Huaneng in Gaobeidian remaining.