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Address: Address: N0.1, Dongli Road, Donglai, Zhangjiagang City, Jiangsu Province, China
Contact name:Sandy Chen
Zhangjiagang HuaDong Boiler Co., Ltd. |
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Boiler Parts Steam Drum Made of Carbon Steel for Sugar Mill in ASME Standard
Definition
A steam drum is a standard feature of a water-tube boiler. It is a reservoir of water/steam at the top end of the water tubes. The drum stores the steam generated in the water tubes and acts as a phase-separator for the steam/water mixture. The difference in densities between hot and cold water helps in the accumulation of the "hotter"-water/and saturated-steam into the steam-drum.
The boiler steam drum is the most important pressure vessel in industrial boilers for storing hot water and steam. In an industrial boiler pipe system, not all hot water can be fully evaporated into steam, but rather, a mixture of steam and hot water. Because saturated hot water needs more heat for conversion into steam, a boiler steam drum is a required piece of equipment. The steam drum separates hot water and steam, where the mixture still flows back for reheating through a down comer.
Classification
| Pressure | Low | Middle | High | Superhigh |
| Inner diameter(mm) | ∅ 800-1200 | ∅ 1400-1600 | ∅ 1600-1800 | ∅ 1600-1800 |
| Thickness(mm) | 16-25 | 32-46 | 60-100 | 80-100 |
| Material | Carbon steel | Carbon steel & Alloy steel | Carbon steel & Alloy steel | Alloy steel |
Steam-water separation details
Primary steam-water separation removes nearly all the steam from the water so that very little steam is recirculated from the drum bottom towards the heated tubes through the outlet connection (downcomer).
At secondary separation, steam is passed through a secondary stage of separators or scrubber elements (usually closely spaced corrugated parallel plates) for final water droplet removal. Steam is then exhausted through various ports.
Accessories
The main components in a boiler system are the boiler feedwater heaters, deaerator, boiler, feed pump, economizer, boiler, superheater, attemperator, steam system, condenser and the condensate pump. In addition there are sets of controls to monitor water and steam flow, fuel flow, airflow and chemical treatment additions.
Quality Control
1. Impact test and Strength calculation report with applied materials information.
2. 100%NDT(non-destructive inspection) report of steel plate, tube and electrode
3. X-ray, γ-ray and liquid penetrant test inspection report (welding seam): to ensure the quality of the entire boiler
4. Hydraulic test report: ensure the standard working pressure and safety
