What is the purpose of soot blowing in boiler?

WHY SOOT BLOWING NECESSARY IN BOILER? A soot blower is a system for removing the soot that is deposited on the furnace tube of a boiler during Combustion. Various types of soot blowers such a wall blowers, long retractable blowers and air heater blowers are used for cleaning.

Why are there a number of soot blower units in a large boiler?

Steam boilers An adequate number of soot blowers should be provided to keep each boiler clean in service (free of soot). The system should be designed for automatic removal of condensate to avoid water shock to the tubes and keeping steam temperature above saturation upstream of the lance tubes.

Why should boiler soot blowers normally only be operated in the correct sequence?

Soot blowers should be used frequently and in proper sequence to prevent the accumulation of heavy deposits of soot since they interfere with heat transfer and are a fire hazard. They are arranged so that the soot is moved progressively toward the uptakes.

How does a soot blower work?

A soot blower works by directing a high-pressure jet of steam, water or air through nozzles onto the cleaning surfaces, thus preventing a deposit build up which would adversely affect the heat transfer efficiency of the heat exchanger. Air, water and steam are the most commonly used cleaning mediums.

What is the recommended air pressure for soot blowing the boiler?

135 to 260 psig
Normal ranges are from 135 to 260 psig at the nozzle of the blower. Pressure is related to the cleaning energy (PIP) required for a given area and cooling requirements.

What is Wall seal blower?

Wall Blower is a sootblower suitable for the cleaning of wall heating surfaces with heavy slagging and high flue gas temperatures up to 1.600 °C. The Wall Blower is fully retracted from the furnace when not in use to protect the nozzle and screw tube from the high heat conditions found in the furnace.

How soot is formed in boiler?

They generally occur in oil boilers and furnaces, and are the result of excess unburned or partially burned fuel oil igniting, which blows a cloud of soot out of the boiler and into the room.

What is a superheater in boiler?

The superheater heats steam above the saturation temperature for a particular boiler pressure. Superheater tubes have steam on one side and hot combustion gases on the other.

What causes soot?

Soot is a byproduct of burning fossil fuels, particularly coal. It is emitted by a variety of sources, including burning coal for electricity or industrial fuel, manufacturing, oil refining, and motor vehicles. Soot is released into the air as either extremely small particles or liquid droplets.

What state is the soot blower in when not in use?

7. In which state would be the soot blower when it’s not in use? Explanation: When not in use the soot blower tube of the system would be dry and uncooled, and subject to gas temperatures.

What is a boiler ik?

I.K. (insertable kinetic) and I.R. (insertable rotating) soot blowers are important components in boilers in coal-fired power plants. Soot can cause significant performance and safety issues in these applications, and so it’s important to prevent it from escaping into the atmosphere.

What are the problems of soot?

Soot can enter your body through inhalation, ingestion or via the skin and eyes. These toxic particles can cause breathing issues, including asthma, bronchitis, coronary heart disease, and even cancer. Infants, the elderly, and those who already have breathing problems are the most affected.