Industrial furnaces
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Industrial Furnaces. Muhammad Tahir 2006-chem-07 Muhammad Azeem 2006-chem-09. Industrial furnace is an equipment that provides heat for a process or chemical reaction. Sometimes the term furnace refers to direct-fired heaters, used in boilers applications in chemical industries.

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Industrial Furnaces

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Industrial furnaces

Industrial Furnaces

Muhammad Tahir 2006-chem-07

Muhammad Azeem 2006-chem-09

engineering-resource.com


Industrial furnaces

  • Industrial furnace is an equipment that provides heat for a process or chemical reaction.

  • Sometimes the term furnace refers to direct-fired heaters, used in boilers applications in chemical industries.

engineering-resource.com


Industrial furnaces

engineering-resource.com


Essential parts

Essential Parts:

  • Burner

  • Radiant section

  • Convection section

  • Shield section

  • Damper

  • Stack

  • Insulation

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Burners

Burners

  • The burner in a vertical, cylindrical furnace is generally located in the floor and fires upward. Some furnaces have side-fired burners.

  • The burner tile is made of high-temperature refractory material that contains the flame.

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Industrial furnaces

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Radiant section

Radiant section

  • The tubes receive almost all their heat by radiation from the flame.

  • Tubes can be vertical or horizontal, placed along the refractory wall or around the middle, or arranged in cells. Studs are used to hold the insulation together and on the wall of the furnace.

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Industrial furnaces

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Industrial furnaces

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Convection section

Convection section

  • The convection section is located above the radiant section, where it is cooler to recover additional heat.

  • In this section, heat transfer takes place by convection, and the tubes are finned to increase heat transfer.

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Industrial furnaces

  • The area of the radiant section just before the flue gas enters the shield section and then the convection section is called the "bridge zone.“

  • The term "crossover" is used to describe the tube that connects from the convection section outlet to the radiant section inlet.

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Shield section

Shield section

  • The first two tube rows at the bottom of the convection section and the top of the radiant section form an area of bare tubes (without fins) and are known as the

    "shield section“.

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Damper

Damper

  • It works like a butterfly valve and regulates the draft (pressure difference between air intake and air outflow) in the furnace. The draft pulls the flue gas through the convection section.

  • It also regulates the heat lost through the stack.

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Industrial furnaces

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Stack

Stack

  • The flue gas stack is a cylindrical structure at the top of the heat transfer chamber. The breeching directly below it collects the flue gas and releases it high in the atmosphere where it will not endanger personnel.

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Insulation

Insulation

  • Insulation is an important part of the furnace because it prevents excessive heat loss.

  • Refractory materials such as firebrick, castable refractories, and ceramic fiber are used for insulation.

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Applications

Applications

  • Metal Industries

  • Glass Industries

  • Chemical Plants

  • Chemical Industries

  • Steel Industries

  • Aluminum Industries

  • Petrochemical plants

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