Boiler Steam Drum Carbon and Alloy Steel Options for Different Requirements

Description

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 drum is the most important component of the natural circulation boiler.The drum can guarantee the normal water circulation and safety of the boiler.

Technical Parameter:

1. Fully automatic operation, safe and reliable, with a variety of boiler control and protection devices, vapor pressure , water pressure and burning all with the automatic control systems. Hot water boiler is also equipped with process control and temperature and time control.

2. Easy to operate and maintain, labour-saving.

3. Equipped with imported brand-name burner, fuel fully combustion and energy conservation, environmental protection.

4. Closed combustion-wide boiler room, pullution-free, good-looking and clean.

5. Compact structure, easy installation.

The boiler headers have water wall header, superheater header,economizer header and so on, it acts as collection, mixture, re-distributing working medium, as the structure, it can be classified as the end cover type( end enclosure) and necking down type.

The header is consisted of header body ( large diameter seamless steel tube ), end cover ( enclosure ) , tube joint, hand hole, thermomter socket and so on. And the welding checking is strictly proceeded as the welding process to guarantee 100% qualified products.

Drum is a cylindrical pressure vessel used for steam water separation and steam purification in water tube boiler to form water circulation circuit and store boiler water. Its main function is to receive water from economizer, separate steam and water, supply water to circulating circuit and deliver saturated steam to superheater. There is a certain amount of water in the drum, which has a certain amount of heat and working medium storage. It can slow down the steam pressure change speed when the working condition changes, and play a certain buffer role when the feed water and load are not coordinated for a short time. The drum is equipped with internal devices for steam water separation, steam cleaning, dosing in the boiler and continuous blowdown to ensure steam quality, as shown in the figure.

Drum is the most bulky and expensive thick wall pressure bearing part in boiler. The drum not only bears high internal pressure, but also generates thermal stress due to the variation of operating conditions and the fluctuation of wall temperature. Therefore, the working conditions are poor, and effective monitoring of operating conditions is needed.

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.

Technical Parameters

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

SuZhou Saneco boiler co.ltd is a high-tech enterprise specialized in producing of boiler spare parts, such as fin tubes, economizers, super-heater and re-heater, boiler water wall panels, boiler manifold headers, and boiler steam drums for industrial boilers. Company also provide turnkey service for our customers from design, manufacturing, installation to maintenance.

The Company covers an area of 200,000 square meters of plant area and has fixed assets of 260 million yuan. The Company has more than 260 employees, including more than 52 engineering and technical personnel, more than 150 qualified welders and 30 professional inspectors (including NDT RT-III personnel).