Key Takeaways
- Boiler water treatment controls contaminants, such as minerals causing water hardness, silica, suspended solids, and dissolved gases.
- Boiler water treatment prevents scaling and corrosion in the boiler, reduces downtime, and prolongs industrial machinery lifecycle.
- The steps of boiler water treatment include filtration, ion exchange, reverse osmosis, suspended gas elimination, chemical dosing, and regular water quality monitoring.
Boiler water treatment is a process of maintaining boiler feedwater quality in the industry operations. This process is crucial to control contaminants that potentially be disruptive towards machine performance and energy efficiency.
Without the right treatment, dissolved minerals and gas in the water can trigger scaling and corrosion in the boiler. Read the following explanation below to understand the definition, steps, and the importance of boiler water in the industry.
What Is Boiler Water Treatment?
Boiler water treatment is used in the boiler industry to restrict pollutants in the water before using it. This treatment ensures that the water quality meets the operational needs and reduces disruption due to unwanted substances.
Water used in the boiler can contain several contaminants, either from the raw water or due to operational processes. Here are some contaminants that must be controlled in this system:
- Minerals that cause hardness: Minerals such as calcium and magnesium can settle and form scaling on the heat transfer surfaces of boilers, impeding heat transfer and reducing energy efficiency.
- Dissolved oxygen and carbon dioxide: Dissolved oxygen and carbon dioxide are gases that can corrode the boiler’s metal components and piping systems.
- Silica: Silica-like compounds can form deposits or be carried along with the steam under certain conditions.
- Suspended solids: Particles such as mud and sediment that can settle within the system.
Keep reading on: Demineralized Water for Industry: Functions & Processes
Why Is Boiler Water Treatment Important?
Boiler water treatment maintains the quality of boiler feedwater and minimizes disruption in the boiler system. Here are some primary reasons for boiler water treatment.
1. Avoiding Scaling
Minerals, like calcium, silica, and magnesium, can trigger scale formation on the boiler heat transfer exchange surface. This scaling can hinder heat exchange, increasing energy consumption and the risk of overheating.
2. Reducing Downtime
Scaling, corrosion, and sediment buildup can disrupt boiler performance and increase the maintenance requirement. The right water treatment reduces operational issues and unexpected production halts.
3. Preventing Corrosion
Dissolved oxygen and carbon dioxide can trigger corrosion in metal components, pipelines, and other boiler-supporting equipment. Uncontrolled corrosion can cause equipment damage and increase the cost of repairs and component replacements.
4. Prolonging Machine Lifecycle
Contaminant control helps reduce the risk of scaling, corrosion, and sediment buildup in boilers and downstream equipment. As a result, the need for repairs and component replacements can be minimized, thereby maintaining system reliability.
How Boiler Water Treatment Works
Boiler water treatment involves procedures that ensure boiler feedwater to the necessary requirements for quality and specifications. This treatment process helps control minerals, particles, and dissolved gases that can potentially cause scale formation or corrosion in equipment.
The steps involved in boiler feedwater treatment may vary depending on the quality of the raw water, operating pressure, and industrial requirements. In general, the process includes the following steps:
1. Initial Filtration
Raw water passes through a filtration system to remove suspended particles, such as sand, silt, and sediment. This stage reduces the concentration of solids that could settle or interfere with subsequent treatment processes. In the initial filtration stage, some commonly used methods include sand filters, carbon filters, and micron filters.
2. Ion Exchange
In this step, air flows into the ion exchanger to reduce mineral content that causes hardness, such as calcium and magnesium. This process prevents scaling in the heat exchanger surface.
3. Reverse Osmosis
Reverse osmosis (RO) uses a semipermeable membrane to lower dissolved salt content and other minerals in the water. This step is implemented when the boiler needs water with a high level of purity.
4. Eliminating Dissolved Gas
Boiler feedwater may contain dissolved gases, such as oxygen and carbon dioxide, which can cause corrosion in boiler pipes and components. To reduce this, industries can use a deaerator, equipment that heats the water to release dissolved gases, and add specific chemicals to control residual oxygen.
5. Chemical Dosing for pH Regulation
This stage involves adding chemicals in controlled amounts to adjust the water’s pH. The type of chemicals and their dosages are determined based on the water’s characteristics and the boiler’s specifications to minimize the risk of corrosion and scale formation.
6. Ensuring Boiler Water Quality
After undergoing the necessary treatment steps, water quality must be checked periodically by measuring parameters such as hardness, pH, dissolved oxygen levels, and total dissolved solids (TDS).
The results will then be used to assess the water’s compliance with boiler specifications and determine whether the treatment process needs to be adjusted.
Support Industrial Water Reliability with Industrial Water from CDI Group
Maintaining water quality is one of the key factors in ensuring the operational efficiency and reliability of industrial boilers. Therefore, selecting a clean water supplier and water treatment solutions that meet specific needs is a crucial step in controlling the risk of scaling and corrosion in equipment.
As an affiliate of PT Chandra Daya Investasi Tbk (CDI Group), PT Krakatau Tirta Industri (KTI) serves as a pillar for industrial water and demineralized water across various sectors as its core business, including for the Chandra Asri Group.
Through its subsidiary, PT Krakatau Tirta Operation & Maintenance (KTOP), KTI provides high-quality demineralized water for industrial applications, including boilers. By utilizing advanced processes and cutting-edge technology, the demineralized water produced is tailored to meet the specific needs of each customer.
We have built several Demineralized Water Treatment Plants to meet the needs of various businesses, one of which is PT Merak Chemical Indonesia. In addition to demineralized water treatment plants, we also operate a Water Recycle Plant (WRP) to recycle wastewater from PT Pelat Timah Nusantara into demineralized water.
With the support of these demineralized water treatment facilities, KTI is committed to meeting industrial water needs for operational purposes. To learn more about water solutions for industrial needs, contact us to discuss your company’s water requirements.
Together with CDI Group and our affiliates, we commit to being #YourGrowthPartner, which is sustainability for your industry growth. Entrust your industrial water needs to CDI Group and KTI, your supporting industry operation.
Discover more topics: Water Recycling: Definition, Stages, and Benefits
Frequently Asked Questions (FAQ)
To understand boiler water treatment in industrial operations, review the following common questions and their answers:
1. What Are the Different Types of Water Treatment?
Water treatment methods include filtration, sedimentation, coagulation, flocculation, demineralization using ion exchange, reverse osmosis (RO), and disinfection.
2. What Is the Difference Between an STP and a WTP?
A Water Treatment Plant (WTP) treats raw water to meet quality standards for specific needs, while a Sewage Treatment Plant (STP) treats domestic wastewater before it is discharged or reused in accordance with regulations.
3. What Is the Function of a Boiler in Industry?
The function of a water boiler is to heat water to produce steam, which is used for various industrial purposes, such as heating, production processes, and driving turbines to generate energy.