What is poppet valve in soot blower?
The present invention relates to a boiler soot blower poppet valve, and more particularly to a boiler soot blower poppet valve for opening and closing the valve to supply steam by the operation of a lever to form a rotation momentum by an external force.
What is the function of poppet valve?
On gasoline engines, poppet valves are used to control the admission and rejection of the intake and exhaust gases to the cylinders. In the Figure (right centre), the valve, which consists of a disk with a tapered edge attached to a shank, is held against the tapered seat C by a compressed spring.
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.
Is a poppet valve normally open?
Poppet valves are used in pneumatic and hydraulic systems. They are commonly controlled through solenoids and can be set to be either normally-closed or normally-open in their de-energized states. They are also used as check valves to provide one-way flow and as relief valves to guard against overpressure.
What is the major disadvantage of using poppet valves?
The disadvantage of poppet valves is that, as the poppets shift from one flow path to another, air is free to travel in any direction. This is known as “crossover.” With pressure-independent models, poppet valves offer a lower flow than slide valves.
What are the types of poppet valve?
There are two types of poppet valves mainly utilized for the required purpose; Two way normally closed valve and two way normally opened valve. In the former one, the stem of the valve pushes the head away of its seating to open the passage for fluid flow. These valves remain closed in normal condition.
What are the rules and regulations to be considered before soot blowing?
The forty (40) percent opacity limit may be exceeded for soot blowing, but may not be exceeded for more than six (6) minutes in a one hour period nor be exceeded for more than a total of twenty-four (24) minutes in a twenty-four (24) hour period. Emissions caused by soot blowing shall not exceed sixty (60) percent.
What is a steam soot blower cooled by while it is in operation?
While a steam sootblower is in operation it is cooled by: steam. A stationary sootblower: has a row of nozzles throughout the lance length.
What is another name for a poppet valve?
A poppet valve (also called mushroom valve) is a valve typically used to control the timing and quantity of gas or vapor flow into an engine.
What is poppet check valve?
A poppet check valve incorporates a disc (normally at the end of a “sleeve” or “stem”) utilized as the checking mechanism. It is often spring loaded to help close the valve prior to fluid flow reversal. This eliminates the hydraulic shock also known as water hammer.
Which is not the advantage of poppet valve?
Due to the constructional constraints, poppet valves are not advantageous when it comes to the relationship between space and flow. The disadvantage of poppet valves is that, as the poppets shift from one flow path to another, air is free to travel in any direction.
What two items will hold the poppet valve tight to the valve seat?
Each poppet valve rests in a circular hole on top of the combustion chamber. The valve seat is what creates a tight seal between the valve and its surface — and the valve spring keeps the component closed by pushing against a retainer. In more high-performing engines, the valves may be made of titanium.