Movable grate (definition)

Movable grate — is a design element of the combustion chamber of a solid fuel boiler that ensures efficient combustion of fuel and ease of removal of ash residues. The grate is a grate installed at the bottom of the combustion chamber through which air passes to maintain combustion and remove ash.

Main characteristics and functions of the movable grate:

1. Design: The moving grate consists of a series of horizontally arranged grates or bars that can move up and down or move horizontally. This movement is carried out manually or automatically, depending on the design of the boiler.
2. Air supply regulation: The movable grate allows you to regulate the amount of air supplied to the fuel. With this regulation, you can optimize the combustion process, ensuring more efficient and complete combustion of the fuel.
3. Ash removal: One of the main functions of the moving grate is to remove ash and coal dust that are formed during combustion. The moving elements of the grate move the ash into special compartments or boxes for subsequent removal, which contributes to cleaner and more efficient operation of the boiler.
4. Ease of maintenance: The movable grate simplifies boiler maintenance, as it allows easy cleaning of the firebox from ash residues and other combustion products.
5. Increased service life: Regular cleaning of the grate and firebox helps prevent overheating and wear of the boiler, thereby extending its service life.
6. Types of movable grates: There are several types of moving grates, including mechanical ones, which are manually controlled by a handle or screw, and automatic ones, which use motorized drives to adjust the movement.

Advantages of a movable grate:

• Combustion efficiency: Allows you to maintain optimal combustion conditions, ensuring complete combustion of fuel and reducing emissions.
• Ease of use: Facilitates ash removal and prevents ash build-up, reducing the need for frequent maintenance.
• Durability: Helps prevent overheating and damage to the boiler, extending its life.

Disadvantages:

• Maintenance Needed: Even with a movable grate, regular maintenance is required to ensure its proper operation.
• Complexity of design: Mechanisms for adjusting and moving the grate can add cost and complexity to the boiler.

The movable grate is an important element in the designs solid fuel boilers, ensuring efficient combustion and simplifying the cleaning and maintenance process.