Understanding Draft System Natural Draft and Mechanical Draft of Boilers

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Draft is the process of drawing air into a combustion chamber. It is an essential part of the combustion process and is necessary for the efficient operation of the boiler. There are three different types of draft systems: natural draft, mechanical draft and induced draft. Each type of draft system has its own advantages and disadvantages. In this article, we will discuss the differences between natural draft, mechanical draft and induced draft and their advantages and disadvantages.

Natural draft is the simplest type of draft system. It relies on natural convection to draw air into the combustion chamber. This type of draft is often used in small boilers and is relatively inexpensive to install. However, natural draft can be unreliable in certain conditions and is not suitable for larger boilers. In addition, it is not as efficient as mechanical draft.

Mechanical draft is a more efficient type of draft system than natural draft. It uses a fan or blower to force air into the combustion chamber. This type of draft system is often used in larger boilers and is more reliable than natural draft. However, it is more expensive to install and can be noisy.

Induced draft is the most efficient type of draft system. It uses a fan or blower to draw air out of the combustion chamber. This type of draft system is often used in larger boilers and is very reliable. However, it is more expensive to install and can be noisy.

In conclusion, natural draft, mechanical draft and induced draft are three different types of draft systems used in boilers. Each type of draft system has its own advantages and disadvantages. Natural draft is the simplest and least expensive to install, but is not as efficient as mechanical or induced draft. Mechanical draft is more efficient and reliable, but is more expensive to install. Induced draft is the most efficient and reliable, but is also the most expensive to install. When choosing a draft system for your boiler, it is important to consider the cost, efficiency and reliability of each type of draft system.

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