zozen boiler
Home Service FAQs Boiler basics What are the external water treatment processes?

What are the external water treatment processes?

15 Jan 2021

It is generally agreed that where possible on steam boilers, the principal feedwater treatment should be external to the boiler.

External water treatment processes can be listed as:

1) Reverse osmosis- A process where pure water is forced through a semi-permeable membrane leaving a concentrated solution of impurities, which is rejected to waste.

2) Lime; lime/soda softening- With lime softening, hydrated lime (calcium hydroxide) reacts with calcium and magnesium bicarbonates to form a removable sludge. This reduces the alkaline (temporary) hardness. Lime/soda (soda ash) softening reduces non-alkaline (permanent) hardness by chemical reaction.

3) Ion exchange - Is by far the most widely used method of water treatment for shell boilers producing saturated steam. This module will concentrate on the following processes by which water is treated: Base exchange, Dealkalisation and Demineralisation.

Related news View More
  • ZOZEN Boiler Empowers Green and High-Quality Industrial Development in Liaoning
    In recent years, green manufacturing and high-quality development have become the main themes of China’s industrial transformation and upgrading. As a leading domestic supplier of high-efficiency and clean boilers, ZOZEN Boiler, backed by profound technical expertise and extensive industry experience, has been repeatedly selected for key projects across Liaoning Province, continuously injecting robust momentum and green energy into local industries. ZOZEN’s Boiler Solutions Serve ...
    05 Aug 2025
  • ZOZEN Boiler in Shandong: Innovative Boiler Models Empower Diverse Production
    On the thriving industrial land of Shandong, the continuous demand for thermal energy supply from enterprises drives the transformation of the boiler industry. With profound technical expertise and ongoing innovation, ZOZEN Boiler remains at the forefront of providing high-quality, adaptable boiler models for various industries.   ZOZEN Boiler Provides Tailored Boiler Solutions for Shandong Industries   Looking back, the cooperation projects with Shandong Luhua Group and Shandong...
    29 Jul 2025
  • ZOZEN Gas Water Tube Boilers Make a Strong Entrance on Cable Industry
    In the industrial zone of Wen’an County, Xinghua Cable Co., Ltd. is making steady progress on its project with an annual production capacity of 11 million meters of wires, cables, and accessories, backed by an investment of RMB 520 million. Upon completion, the project is expected to create over 150 jobs and generate annual sales revenue of RMB 800 million, demonstrating promising prospects. As a key supplier of thermal energy equipment, ZOZEN Boiler is quietly supporting the development o...
    22 Jul 2025

Find the Right Boiler For You

Name *

Email *

WhatsApp/WeChat

Products

Power/Capacity