Table of Contents
What is the purpose of soot?
Uses. Although a somewhat harmful byproduct of combustion, soot can be used as a pigment for inks and dyes (in fact both lampblack and carbon black are dyes made of soot). Soot is used in a vulcanization process to treat rubber, and is used in toners for laser printers and copiers.
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.
Why are operating heads of soot blowers automated?
5. Why operating heads of soot blowers are automated? Explanation: Soot blowers are tedious to operate manually, and since must not all be operated simultaneously, the operating heads are electric motor powered and operated by remote control on an automatic sequential basis.
What temperature does soot burn at?
The problem: Soot particles only burn above temperatures of 500 to 600 degrees Celsius. Yet the temperature of truck exhaust is increasingly dropping as part of the effort to minimize emissions of nitric oxides harmful to the environment.
What causes soot in a boiler?
Causes of Soot Buildup Soot is the inevitable result of burning fossil fuels, and boilers that run on gas or oil produce soot simply by doing their job. Large amounts of soot can be caused by a dirty, clogged or malfunctioning burner, inadequate draft or a low air-to-fuel ratio.
What is the purpose of blower Mcq?
What is the purpose of the blower? Explanation: The purpose of the blower is to increase the air flow or create additional air flow, the purpose of blower controls is to provide the correct air flow at any time, which in time provides the enhanced aeration efficiency. 5.
How do you remove soot?
Soot particles can be very fine and you may cause further damage by trying to brush them away. Instead, use the nozzle attachment of the vacuum cleaner to pick up the residue. Sprinkle talcum powder over the area to absorb the stain, rub in lightly, then vacuum away the deposit.
What harm does soot cause?
Soot can enter the 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.
Why do boilers soot up?
Soot is the inevitable result of burning fossil fuels, and boilers that run on gas or oil produce soot simply by doing their job. Large amounts of soot can be caused by a dirty, clogged or malfunctioning burner, inadequate draft or a low air-to-fuel ratio.