Description
The steam drum is the primary interface between water and steam. In a coal-fired plant, boiler feedwater passes through the economizer and into the drum where the steam separates from the feedwater and is drawn off to the superheater.Maintaining constant liquid level in the upper part of the steam drum is necessary to provide the proper quality of steam. Instrumentation must withstand high temperatures and pressures.
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.
Certificate
Company Introduction
Established in 1985,Zhangjiagang Hua Dong Boiler Co.,Ltd.(trading as HD Boiler),produces power plant; industrial; waste heat; waste incineration; biomass; organic heat carrier and electric steam boilers. Coupled with a comprehensive range of heating surfaces, HD Boiler brings to the market a unique service including boiler design , fabrication, installation, maintenance and replacement of boiler pressure parts.
1. Fabrication area of 200,000 square meters
2. 150 Engineers
3. 600 Coded welders
4. 60 Licensed Inspectors(NDT Level-III instructors)
5. Class-A Licenses for Design and Manufacture Boiler
6. ISO 9001:2008 Quality System
7. ASME Certificate of Power Boilers
8.ASME 'S','U' and NB stamp authorization
Design and Manufacturing capacity
1. Two automatic coiler production lines
2. Hot bending to minimum bending radius 0.6D
3. Membrane wall tube bending , with horizontal and vertical panel bending machines
4. Panel fabrication for up to for 1000MW power plant boilers
5. Fabrication of CFB Boiler Cyclone Separators
6. Fabrication of Header to Chinese standards(GB), US standards (ASME), or EU standard (EN)
7. Broad range of heat treatment equipment including 10 furnaces, offering normalizing and tempering
