Boiler industry standards and pneumatic valve type selection

the boiler industry standards and pneumatic valve selection
the boiler industry analysis:
the boiler is a kind of energy conversion equipment, the energy input to the boiler is the chemical energy of the fuel, electricity, high temperature flue gas heat and other forms, and through the boiler transformation, exporting has certain heat of steam, hot water or organic heat carrier. Refers to the literal meaning of the pot on the fire to heat the water container, furnace refers to the place of fuel combustion, boiler including boiler and furnace of two parts. Hot water or steam boiler of can directly provide the required heat energy for industrial production and people's life, also can be converted into mechanical energy by steam power device, or by a generator converts mechanical energy to electrical energy. Provide hot water boiler is called hot water boiler, mainly for the life, also have a small amount of application in industrial production. Generate steam boiler called steam boiler, often referred to as 'for boiler, used for power generation, shipbuilding, locomotive and industrial and mining enterprises.
the boiler industry standard:
GB - Boiler installation project construction and acceptance standard
JB/T - Boiler materials into the factory inspection rules used pneumatic valves are:
boiler boiler pneumatic ball valves, pneumatic boiler safety valve, pneumatic valve, boiler pressure boiler plunger pneumatic valve, needle type pneumatic valve of the boiler, boiler control pneumatic valve, boiler exhaust pneumatic valve, etc. Details, please contact land net of China pump pneumatic valve.
, boiler damper of the pneumatic valve in the pipeline and smoke wind system shall have clear mark, showing the pneumatic valve and damper's name, number, switch direction and flow direction of medium, mainly adjust the opening of pneumatic valves shall also have the instructions.
the operating mechanism of pneumatic valve, damper shall be installed in easy operation.
, main steam pneumatic valve should be installed near the drum ( Pot shell) Or the superheater outlet header. ChanYuanJi composed of boiler, pneumatic valve can be installed to the main steam turbine at the entrance. Vertical boiler main steam pot shell is easy to operate the pneumatic valve can be installed in the boiler room. Boiler and steam mother tube on the connection of each steam pipe, shall furnish two cut pneumatic valves, cut off between pneumatic valves shall be equipped with the drain pipe to the atmosphere and the pneumatic valve, the inside diameter shall not be less than the mm.
and rated capacity is greater than or equal to t/h boiler should furnish pneumatic valve remote control of the exhaust steam into the air.
and not fraction economizer inlet should be installed on the feed pipe of water supply cut off pneumatic valve and feed check pneumatic valve. For unit and boiler feed pipe is not loaded on feed check pneumatic valve. Split the entrance of the economizer and leads to the drum ( Pot shell) On the feed pipe should be installed respectively water supply cut off pneumatic valve and feed check pneumatic valve.
, water supply cut off pneumatic valve should be installed in the drum ( Pot shell) （ Or the economizer inlet header) And feed check pneumatic valve, pneumatic valve with feed check immediately.
and rated capacity greater than t/h boiler, should be installed automatically feed water regulator, and is easy to operate the location of the furnish in stoker workers manual control device for water supply.
and the rated steam pressure is greater than or equal to zero. Of MPa safety should be the lowest of the drum boiler water level and indirect out emergency discharge pipe of normal water level, discharge pipe should be installed on the pneumatic valve, once filled with water so that water in a timely manner. The pneumatic valves must be closed during boiler operation.
, in the drum ( Pot shell) , superheater, reheater and economizer should be installed where possible agglomeration air vent pneumatic valve.
and different working pressure of the steam boiler should have independent pipeline and water supply pipe. Such as using a steam mother tube, high pressure steam pipeline in must have automatic pressure-relief devices, as well as to prevent the low voltage side overpressure safety device ( Such as check pneumatic valve) 。 Feed water pressure does not exceed the highest % of work pressure, can be caused by the total water supply system to the boiler feed water.
, boiler feed water system, water supply should guarantee the safe and reliable. Boiler room should have spare water supply equipment. The arrangement of the water supply system and the backup sets and capacity of water supply equipment, be determined by the boiler room design units according to the design specification.
and the rated capacity is greater than or equal to t/h boiler shall have the pan of water sampling device, the steam quality requirement, shall also have the steam sampling device. Sampling system and sampling point location should guarantee the steam out of water, the sample is representative.