Why is ash handling harder than coal handling?

Why ash and dust handling is more difficult than coal handling?

Ash produced is about 10 to 20% of the total coal burnt in the furnace. . Handling of ash is a problem because ash coming out of the furnace is too hot, it is dusty and irritating to handle and is accompanied by some poisonous gases. … (iv) It produces poisonous gases. (v) It has corrosive action.

What are the difficulties encountered in ash handling?

Given the fine particle size, frictional nature and high temperature, fly ash can be a difficult material to handle reliably. In this article, we will look at various types of flow problems that can occur in fly ash handling and storage systems, including arching, ratholing, flow rate limitations and flooding.

What is purpose of coal and ash handling system?

Coal ash handling systems are created to safely and efficiently transfer ash from boilers to storage units, where they are then finally disposed of in a responsible manner. There are several types of solids that constitute ‘coal ash’, and several ways of handling residuals from the burning of coal.

Which is ash handling system?

In thermal power plants, an ash handling system is used to collect and dispose off discharged ash, once it has been cooled down to a manageable temperature, which is then used in various industries like construction, cement plants, and other allied industries.

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How ash handling is done?

A typical ash handling system may employ vacuum pneumatic ash collection with ash conveying from several ash pick up stations and resulting in delivery to an ash storage silo for interim holding prior to load out for disposal or reuse. Pressurized pneumatic ash conveying may also be employed.

Why is it important to prefer ash handling?

Why is it important to prefer ash handling systems? Explanation: Considering the large coal burning capacity plant of modern times, the amount of ash produced when the coal is burnt is in thousands of tones. It could have an effect on other subjects too if the proper ash handling methods are not followed.

What are the requirements of good ash handling plant?

Almost 80% of ash generated in power plant is Fly ash and generally is in form of very fine particles. It is collected via apparatus such as economizer hoppers, air pre-heater hoppers, electrostatic precipitators and dust collectors positioned in the flue gas processing system.