18 Questions
What initiates the conveying of limestone to the limestone bunker in the ash handling system?
Injection of conveying air into the vessel
What happens when limestone in the fine product hopper reaches a predetermined level in the level mode?
The level probe signals the inlet dome valve to open.
How is limestone conveyed to the limestone bunkers in the boiler area?
Via pneumatic conveying
What is the purpose of venting conveying air through the bag filter mounted on the bunker?
To limit dust concentration in the vented air below 30mg per cu.m
What action is taken once the clearance of limestone cycle is completed?
Limestone collection cycle continues till hopper reaches minimum level
What is the purpose of the Service Air Receiver?
To store compressed air for both ash and limestone conveying
How is bagged limestone initially handled in the plant?
It is lifted and dropped into the fine product hopper by a hoist
What triggers the dome valve to close in the ash handling system?
Reaching a predetermined limestone level in hopper(s)
What is the purpose of the transmitter vessel in the limestone conveying system?
To act as an intermediate storage vessel between the hopper and bunker
What conditions are checked before initiating the limestone conveying cycle?
Availability of limestone in the bunker, bag filter status, and conveying air pressure
What mode of operation is mentioned for the limestone conveying system?
Level mode
What is the purpose of the manual knife gate valve in the limestone conveying system?
To isolate the transmitter vessel for maintenance purposes
What is the purpose of the cam lock coupling mentioned in the text?
To connect the exit line of the bulker to the limestone + air mixture line for pneumatic conveying
How is the bed material received at the plant?
In bags
What is the purpose of the level transmitter mentioned in the text?
To check the availability of bed material in the bunker before initiating the conveying cycle
What is the purpose of the pneumatically operated dome type inlet valve mentioned in the text?
To control the flow of bed material from the hopper to the transmitter vessel
What is the mode of operation for conveying bed material mentioned in the text?
Level mode
What is the purpose of the pressure transmitter on the air receiver mentioned in the text?
To check the availability of sufficient conveying air pressure before initiating the conveying cycle
Learn about the requirements for compressed air in ash conveying systems and the conveying of limestone powder in industrial plants. This quiz covers topics like service air receivers, pipe work materials, and methods of receiving and handling limestone powder.
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