The main purpose of water treatment is to ensure clean and safe water supply for various applications ranging from municipal use to industrial processes. In this process, water treatment grille bar screens are an important component of the water treatment system. They are installed before the water inlet of the treatment facility and are responsible for filtering out large debris and solid impurities in the water. Depending on the design and application, various types of water treatment screen bars have their own unique functions and advantages.

Vertical Grille Bar Screens

Vertical grating bar screens are one of the most commonly used equipment in water treatment facilities. They consist of a series of bars arranged vertically at specific intervals, intercepting debris in the water while ensuring smooth water flow. This type of screen is often installed at the water inlet of water treatment plants, pumping stations and other water facilities.

The characteristics of vertical grating bar screens are summarized as follows:

Effective removal of large debris: Its vertically arranged bar structure can effectively capture floating and suspended matter in the water.

Adjustable bar spacing: The spacing between the bars can be adjusted according to the size of the debris to be removed.

Strong durability: The screen is made of corrosion-resistant materials such as stainless steel, which has high durability in harsh working environments and continuous operation conditions.

Low head loss: The vertical design reduces the resistance of water flow, thereby reducing the energy required during the pumping process. While ensuring efficient filtration, it effectively reduces head loss.

Vertical grating bar screens are particularly suitable for applications where the water flow is large and a large amount of large debris needs to be handled. They are often used as the first barrier to protect downstream equipment from large objects.

Horizontal Grille Bar Screens

During the operation of the horizontal water treatment grille bar screen, its horizontally arranged bar structure begins to play its role. As water flows through the screen, debris that tends to sink or roll along the bottom is effectively captured and retained on the screen surface. This sieve is particularly effective in shallow water areas.

As debris accumulates on the screen, the operator will notice it and perform maintenance as appropriate. Due to the design characteristics of the horizontal grid bar screen, most of the debris will accumulate on the top of the screen, which makes manual cleaning relatively simple. The operator only needs to follow the established procedures to remove debris from the screen surface and ensure that the screen remains unobstructed so as not to affect the subsequent water treatment process.

Throughout the operation, the horizontal bar screen demonstrates its unique advantages, especially in reducing the risk of clogging and easing maintenance. This makes it a suitable choice for certain applications, such as stormwater management systems or areas where protection of benthic aquatic life is required.

Inclined Grille Bar Screens

Water flows through the inclined grid bar screen, carrying all kinds of debris and impurities. Because the screen is installed at an angle of 60 to 85 degrees to the horizontal, when the water hits the screen surface, the debris and impurities are intercepted by the screen bars and slide up along the screen surface. This tilted design not only increases the contact time between the debris and the screen surface, but also makes it easier for the debris to be collected and directed to the top or side of the screen.

As the debris accumulates on the screen, the cleaning mechanism will be activated in time to keep the screen unobstructed and the water flow smooth. This cleaning process may include mechanical scraping, water flushing or other methods, depending on the design of the screen and the application environment. The role of the cleaning mechanism is to remove debris from the screen surface and ensure that the screen can continue to effectively intercept new debris.

During operation, the inclined screen can successfully intercept various debris and impurities in the water. Its unique structure helps to reduce the resistance loss when the water flows through, thereby enhancing the operating efficiency of the entire system. In addition, the inclined screen has the characteristics of compact structure, easy layout, and can adapt to various water flow conditions. Therefore, in wastewater purification, combined sewage system and industrial water intake structure, the inclined screen has become the preferred solution.

Inclined grid bar screens require cleaning and maintenance to ensure long-term stable operation. Regular inspection and cleaning of the screen can extend its service life and prevent system efficiency loss due to clogging. Therefore, in actual applications, a reasonable cleaning and maintenance plan should be formulated according to the specific situation.

Self-Cleaning Grille Bar Screens

Self-cleaning screen bars represent an important technological advancement in water treatment. They are equipped with an automated cleaning system that automatically removes accumulated debris, reducing reliance on manual maintenance and increasing system reliability.

Key features include:

Automatic cleaning mechanisms use built-in tools such as rakes or brushes to clean the screens at regular intervals without human intervention.

During cleaning, the self-cleaning mechanism maintains the flow of water, ensuring that the system is not affected and continues to work properly.

From a cost perspective, automatic cleaning reduces the number of manual cleanings, thereby reducing the cost of operation.

In addition, automatic cleaning improves safety because it reduces the need for personnel to perform manual cleaning tasks that may be risky.

Regular automatic cleaning maintains the filtering effect of the screens, ensuring that debris is effectively removed while maintaining smooth water flow.

Self-cleaning screen bars are particularly suitable for high-flow environments or where manual cleaning is difficult or cost-prohibitive. They are widely used in large municipal water treatment facilities, power plants and industrial water systems.

Kairun® Water Treatment Grille Bar Screen

Kairun® is a professional water treatment equipment manufacturer dedicated to providing a variety of grille products to meet various water treatment needs. Kairun®'s water treatment grille bar screens combine innovative design and solid construction to ensure efficient removal of debris from the water.

Its main features are:

High-quality construction materials: Corrosion-resistant materials such as stainless steel or specific alloys are used to ensure long service life and good performance in harsh environments.

Flexible configuration: Different types such as vertical, inclined and self-cleaning are available, and customers can choose the most suitable grille according to actual application needs.

Precise process: The spacing and screen angle of the grille are precisely calculated to optimize the removal of debris while minimizing water flow resistance.

Easy integration: Kairun®'s grille design is easy to integrate with existing water treatment systems and is also suitable for installation as a new system component.

Energy-saving and efficient: The screen design focuses on reducing water flow resistance, which helps reduce the energy required for pumping and overall system operation.

Kairun® not only focuses on product quality, but also provides customers with comprehensive warranty services to ensure that customers have confidence in their investment. While specific warranty terms may vary by product, Kairun generally provides warranty against manufacturing defects and performance issues, provided the product has been properly installed and maintained.

For customers who are looking for a water treatment grille bar screen manufacturer, Kairun® welcomes inquiries at catherine@kairunpump.com for details on product specifications, customization options, and warranty terms.

References

1. American Water Works Association. (2021). Water Treatment Plant Design, 6th Edition. McGraw Hill.

2. Environmental Protection Agency. (2022). Wastewater Technology Fact Sheet: Screening and Grit Removal. EPA 832-F-03-011.

3. Metcalf & Eddy. (2019). Wastewater Engineering: Treatment and Resource Recovery, 5th Edition. McGraw Hill Education.

4. Water Environment Federation. (2020). Design of Water Resource Recovery Facilities, Manual of Practice No. 8, 6th Edition. WEF Press.

5. Journal of Water Process Engineering. (2023). "Advancements in Self-Cleaning Mechanisms for Water Treatment Screens." Volume 51, 102409.

6. International Water Association. (2022). "Comparison of Vertical and Inclined Bar Screens in Wastewater Treatment: A Case Study." Water Practice and Technology, 17(3), 679-689.