What is "water" when operating a gas-fired heating boiler?
Operation of gas heating boiler
When the water level of gas heating boiler can not be seen, the method of flushing water level meter is used to judge whether the water is short of water or full of water. If the water level meter is judged to be short of water, the gas heating boiler whose water connection pipe is lower than the highest fire boundary should immediately stop the furnace urgently, reduce the furnace temperature and close the main steam valve and the water supply valve. For gas heating boilers with large water capacity and higher water connecting pipe than the highest fire boundary of gas heating boilers, the severity of water shortage can be judged by the method of "called water", so as to take corresponding measures.
When the water shortage is not serious, the gas heating boiler can continue to feed water, and after the normal water level is restored, the combustion equipment can be started to heat up gradually and the pressure can be put into operation.
Through "called water", when it is judged to be seriously short of water, the furnace must be shut down urgently and blindly feed water to gas-fired heating boiler. Fluke psychology must not be allowed to blindly feed water in an attempt to cover up the responsibility of causing water shortage in gas-fired heating boilers. This kind of mistake often leads to great disaster, expands the accident, and even causes the gas heating boiler to explode and destroy the furnace to death.
The method of "water" is:
(1) opening the discharge cock of the water level meter.
(2) close the steam cock.
(3) close the water cock.
(4) close the discharge cock again.
(5) then open the water cock to see if any water is washed out of the water connection pipe. If there is water flushing out, there is a slight shortage of water; if there is no water level, it is proved to be a serious shortage of water. The "water" process can be repeated several times, but not delayed for too long, so as not to expand the accident.
The principle of "called water" operation is that when the water release cock is turned on and then the cock between the water connecting pipe and the water level meter is closed, the water level meter is connected with the big steam, and the pressure in the water level meter is zero. At this time, close the discharge cock and open the water cock between the water connecting pipe and the water level meter, because the pressure in the pot tube is higher than the pressure in the water level meter, if the water level of the drum is near the water connecting pipe, the water will be brought into the water level meter by the steam flow. This shows that the degree of water shortage is not serious. If there is no water level in the water table after "called water", it is considered that the water shortage is more serious.
