How ash is handled in the power plant?
CLASSIFICATION OF ASH HANDLING SYSTEMS: It is generally used in large power plants. The hydraulic system is generally used for intermittent ash disposal figures. In this method water at sufficient pressure is used to take away the ash to a sump. The ash is then dumped.
What is ash handling?
Ash handling refers to the method of collection, conveying, interim storage and load out of various types of ash residue left over from solid fuel combustion processes. The most common types of ash resulting from the combustion of coal, wood and other solid fuels. bottom ash. bed ash.
What are the principal requirements of an ash handling plant in a thermal power station?
The main interlocks in the ash handling system in thermal power plants are as follows.
- Instrument air pressure not low.
- Conveying pressure not low.
- Silo level not high.
Which is the largest NTPC in India?
Vindhyachal Thermal Power Station
Vindhyachal Thermal Power Station, Madhya Pradesh The Vindhyachal Thermal Power Station in the Singrauli district of Madhya Pradesh, with an installed capacity of 4,760MW, is currently the biggest thermal power plant in India. It is a coal-based power plant owned and operated by NTPC.
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.
How is fly ash collected?
Fly ash material solidifies while suspended in the exhaust gases and is collected by electrostatic precipitators or filter bags. Since the particles solidify rapidly while suspended in the exhaust gases, fly ash particles are generally spherical in shape and range in size from 0.5 µm to 300 µm.
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 type of ash?
Broadly speaking, coal ash and wood ash are the two most talked about types of ash, although ash is created during any process of incomplete combustion. Due to the variety of potential fuels, the chemical composition and even appearance of ash can vary drastically.
Who is owner of NTPC?
NTPC Limited
| Formerly | National Thermal Power Corporation Ltd. |
|---|---|
| Founded | 7 November 1975 |
| Headquarters | New Delhi , India |
| Area served | India |
| Key people | Gurdeep Singh (Chairman & MD) |
Which system is used following ash handling systems?
Which of the following ash handling system is more suitable for large thermal plants? Explanation: Hydraulic ash handling system is more suitable large thermal plants since its ash carrying capacity is considerably large. And also it has ability to dissolve the ash in the water which makes its capacity large.
What is the ideal site for power plant?
(i) Supply of fuel: The steam power plant should be located near the coal mines so that transportation cost of fuel is minimum. However, if such a plant is to be installed at a place where coal is not available, then care should be taken that adequate facilities exist for the transportation of coal.
What is bulk density in ash handling plants?
4 Maintenance of Ash Handling Plants and Pneumatic Conveying Systems www.practicalmaintenance.net Bulk Density Bulk weight or bulk density of a lumpy material is the weight of the material per unit volume in bulk.
What is the maintenance contract for ash disposal pipeline?
Maintenance Contract for Ash Disposal Pipelines, Ash Water Recirculation Pipelines and Ash Dyke Sprinkling System including Erection / Replacement of Ash Disposal Pipelines Maintenance / Overhauling Contract of Boiler Pressure Parts and associated works for units of 200 MW & above.
What is in the ash handling booklet?
The information contained in this booklet represents a significant collection of technical information on Fundamentals, Troubleshooting & Maintenance of Ash Handling Plants and Pneumatic Conveying Systems for Bulk Materials. This information will help to achieve increased reliability at a decreased cost.
How flyash is being supplied to cement industry?
FlyAsh is also being brought to demand centre like NTPC-Dadri through BTAP wagon rakes from Rihand for supply to Cement industry. NTPC Kahlgaon and Ramagundam are supplyingFlyAsh through Railway wagon rakes on regular basis to Cement industries located in North East States and Gulbarga region respectively.