The economizer tube material and specifications

The economizer tube is a device used for waste heat recovery of boiler exhaust gas, and its basic knowledge mainly includes the following contents:

The economizer tube is a device that uses the waste heat of the waste gas to preheat the feed water, which can improve the combustion efficiency of the boiler, save fuel consumption and reduce environmental pollution. By allowing the waste gas to exchange heat with the feed water flowing through the pipe in the economizer tube, the temperature of the feed water is raised, reducing the fuel consumption of the boiler and improving the thermal efficiency of the boiler.

The economizer tube is usually composed of many small tubes arranged in parallel, and the inside of the tube is spiral or straight to increase the resistance of the tube wall to the flow, thereby improving the heat transfer efficiency. Different heat recovery effects can be achieved by connecting multiple small tubes in parallel or in series.

The models of economizer tube vary according to their structures and uses. The following are some common models:

1. Straight-through economizer tube: A single tube is used to directly connect the inlet and outlet, which has low heat transfer efficiency and is suitable for small boiler systems.

2. U-shaped economizer tube: It is spliced by multiple U-shaped curved tubes, with high heat transfer efficiency and compact structure, suitable for small and medium-sized boiler systems.

3. Spiral economizer tube: spiral or cylindrical sheets are arranged inside the tube, which improves heat transfer efficiency and is suitable for medium and large boiler systems.

4. Cylindrical shell economizer tube: It adopts a cylindrical shell structure, and the periphery is an air side deflector and a rain cover. It has high heat transfer efficiency and is suitable for large-scale power plant boiler systems.

In addition, there are different types of economizer tube such as cross type, parallel type and vertical type, which can be selected according to the requirements of the boiler system.

Economizer tubes are usually made of high-strength, corrosion-resistant alloy steel or stainless steel to ensure long-term safe and stable operation of the equipment. Economizer tube is widely used in boiler systems in high energy consumption industries such as power plants, chemical plants, and steel plants, and are of great significance for improving production efficiency and reducing operating costs.

economizer tube