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  • 2023-11-12

vertical fire tube boiler

fire tube boiler is a boiler that uses hot gases from a fire to heat water in a series of tubes. The tubes are surrounded by water in a sealed container. The heat in the gas is transferred through the tube walls by thermal conduction, producing steam that can be used for various purposes. Heat can be efficiently utilized for a variety of applications. In this comprehensive article, we delve into the intricacies of fire tube boilers, exploring their design, features, benefits, and FAQs to enhance your understanding of this important heating tool.

What is the fire tube boiler?

Fire tube boilers comprise drums, tubes, and other important pressure components. The core part is the fire tube because the fire tube is the main channel for transmitting heat. Fire tube boilers are generally divided into two types: natural circulation and forced circulation. Natural circulation boilers rely on physical principles to circulate water, while forced circulation boilers require water pumps to circulate water.

How Do Fire Tube Boilers Work?

Fire tube boilers commence operation by burning fuel which results in hot gas production. These gases flow through the tubes embedded in water, transferring their heat to the water. Water absorbs the heated energy, converting it into steam. This process is known as heat transfer.

Here, circulation plays a crucial role as it allows the even distribution of heat on the tubes and water. The forced circulation provided by the steam generation helps distribute heated water particles to cooler sections.

The main characteristics of fire tube boilers are as follows:

  • Compact structure and easy operation: The main body of the fire tube boiler has a compact structure and a small footprint, making it easy to install and maintain. At the same time, its operation is simple and easy to understand, and it can be adapted to use in different environments.
  • High thermal efficiency: The fire tube boiler adopts efficient combustion technology and heating surface design so that the heat can be fully utilized and the thermal efficiency is high.
  • Good environmental performance: Today’s fire tube boilers adopt advanced environmental protection technologies, such as low-nitrogen burners, which effectively control harmful substances in the flue gas and reduce the impact on the environment.
  • Strong adaptability: Fire tube boilers are suitable for various fuels, such as coal, 油, gas, etc., and can adapt to different usage environments and working conditions.

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Advantages and Disadvantages

利点:

  1. Lower Initial Cost: Fire tube boilers offer a lower initial investment cost compared to other types of boilers. This aspect makes them a preferred choice for many applications that have budget constraints in mind.
  2. Easy to Operate: Fire tube boilersdesign simplicity makes them easy to operate, eliminating the need for specialized training.
  3. Compact Design: These types of boilers are compact in design, which makes them a good option for locations with limited space.
  4. Sudden Load Handling: Once they achieve the operating pressure, fire tube boilers demonstrate better handling of sudden load surges due to their large steam disengaging area.

Disadvantages:

  1. Long Start-Up Time: Fire tube boilers, though smaller in design, have a larger water volume. This causes them to take longer to reach operating temperature from a cold start.
  2. Limited Capacity and Pressure: They traditionally handle lower capacities and cannot sustain high pressures exceeding 250 psig.
  3. Performance Drop Recovery Time: In cases where pressure in the fire tube boiler drops, it requires more time to return to optimal performance.

advantages of fire tube boiler

Types of Fire Tube Boilers

Some of the most common types of fire tube boilers are:

  • Simple Vertical and Scotch Marine Boiler: A Simple Vertical boiler is a fire tube boiler characterized by a straightforward vertical design comprising multiple fire tubes. The Scotch Marine Boiler, 一方で, is a design with one or more than one number of furnace tubes running through the center of the boiler.
  • Cochran Boiler: This vertical, multi-tubular, internally fired, fire tube boiler is a modified form of a simple vertical boiler. The Cochran boiler consists of a single large drum functioning as a reservoir for both steam and water, accompanied by a series of smaller tubes through which different flue gases pass. The heaters, using coal or oil as fuel, produce hot flue gases that then heat the water.
  • Cornish Fire Tube Boiler: The Cornish boiler is notable for its single large flue containing the fire. It was the successor to the boiler designs with a single flue with a return through a long external flue.
  • Lancashire Fire Tube Boiler: A Lancashire Boiler is a type of boiler in which hot gases pass through tubes while the water flows through the larger pipes that surround these tubes.
  • Horizontal Return Tubular (HRT) Boiler: The HRT boiler is a fire tube boiler that has a horizontal orientation and a long, cylindrical shape.
  • Horizontal Fire-Tube Boilers: Horizontal fire-tube boilers represent the most prevalent type and usually find application in residential and commercial settings.
  • Vertical Fire-Tube Boilers: Vertical fire-tube boilers find application in some industrial settings. While less prevalent than their horizontal counterparts, they still hold value in specific contexts.

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Fire Tube Boiler アプリケーション

Fire tube boilers are widely used in the following industrial fields:

  • Application in the textile industry: Fire tube boilers can provide high-temperature and high-pressure steam for yarn dyeing, weaving and other production processes. Yarn dyeing requires a large amount of heat energy, and fire tube boilers can stably provide high-temperature steam and a certain pressure to meet the needs of the dyeing process.
  • Application in the pharmaceutical industry: Fire tube boilers can provide high-temperature and high-pressure steam for material drying, drug synthesis and other production processes. Material drying requires a large amount of heat energy, and fire tube boilers can stably provide high-temperature steam and a certain pressure to meet the needs of the drying process.
  • Application in the food industry: Fire tube boilers can provide high-temperature and high-pressure steam for food processing, packaging and other production processes. Food processing requires a large amount of heat energy, and fire tube boilers can stably provide high-temperature steam and a certain pressure to meet the needs of the processing technology.

fire tube boiler application

Technical Parameters

The following are some common fire tube boiler models and their main technical parameters:

  • Straight Smoke Tube Boiler: Heat transfer in this type of boiler occurs between the flue gas and water in the tubes. It is usually suitable for small heating systems such as homes, schools and office buildings.
  • Inclined tube boiler: The inclined tube boiler is an improved version of the fire tube boiler. The boiler’s smoke tube is angled to increase the heat transfer area between the flue gas and water, ultimately improving thermal efficiency. Suitable for small and medium-sized heating systems in factories, hospitals, hotels, 等.
  • 水管ボイラー: A water tube boiler is a more complex model of a fire tube boiler. Its characteristic is that flue gas and water transfer heat in different pipes. Usually suitable for large heating systems, 発電所など, chemical plants, large buildings, 等.
  • Multi-pass boiler: A multi-pass boiler is a high-efficiency fire tube boiler model. By transferring heat through multiple return passes, the heat of the flue gas can be fully utilized. Suitable for large industrial heating systems, such as steel plants, petrochemical plants, paper mills, 等.

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結論

Fire Tube Boilers have revolutionized the heating industry, offering efficiency, compactness, and versatility. Understanding their working and advantages is crucial for making informed heating choices. Embrace the power of Fire Tube Boilers for efficient and sustainable heating solutions.

よくある質問

How do Fire Tube Boilers differ from Water Tube Boilers?

Fire Tube Boilers circulate hot gases through tubes immersed in water, while Water Tube Boilers circulate water through tubes surrounded by hot gases.

What maintenance is required for Fire Tube Boilers?

Regular cleaning and inspection of tubes, burners, and valves are crucial for optimal Fire Tube Boiler performance.

Are Fire Tube Boilers environment-friendly?

はい, Fire Tube Boilers are designed to minimize harmful emissions, contributing to a greener environment.

Can Fire Tube Boilers be used for residential heating?

はい, Fire Tube Boilers are suitable for both industrial and residential heating applications, providing efficient and consistent heating.

What fuels can Fire Tube Boilers use?

Fire Tube Boilers can use various fuels, including natural gas, diesel, and biomass, offering flexibility and adaptability.

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