Common fault cleaning of gas generator
1, gas pressure machine suddenly stopped
The pressurizer stopped working because of a power failure.This situation will suddenly affect the gas producer.Its characteristic is: the furnace gas pressure rises greatly, the furnace bottom pressure also increases.Must spread, drop the wind pressure, close the wind valve, down full temperature.Note that the air valve must not be closed.If long - term power failure, according to hot standby operation.
2, air blower parking
The blower and the pressure machine are interlocked in the planning, the pressure machine parking, the blower will automatically stop operation.But also should prevent interlock failure (the use of hot gas without cooling purification does not exist interlock problem).The gas outlet pressure dropped to zero.At this time, no matter which kind of gas stove is used, it is necessary to increase the steam flow to the bottom of the furnace, to ensure the positive pressure in the furnace, together, closed air valve, according to the situation spread.And immediately notify the pressure machine to stop the operation.Prevent the furnace negative pressure into the air.
3, add coal machine fault
If there is something wrong with the stoker, it should be stopped and repaired.Stop furnace should stop completely, do not turn to heat repair.If be a lot of furnace parallel operation, answer to add standpipe water to seal water again, block off to enter gas main path, draw up repair plan sternly, do not come to form trouble blindly.
4, steam bag water shortage (atmospheric pressure gas generator does not exist)
Steam bag water, pay attention to the unknown factors before, do not water.Treatment method: first, turn over the water level meter water cock water, if found a few water display, clarify water shortage time is not long, can be on the water.The second is to turn over the water level gauge cock no water display, clarify water shortage time is longer, together to observe the steam pressure change, if the pressure and normal operation pressure is the same, clarify water shortage is not severe, steam pressure has exceeded the operation pressure, clarify water jacket water shortage is quite severe.In this case, it is necessary to stop the furnace immediately and prohibit water on the furnace jacket to prevent the explosion.
5, air pipeline gas reverse flow
Air pipe during normal operation, the gas will not flow into the air pipes, but, if be but Russia is a power outage, it may come back from the bottom of the furnace gas into the drum bellows, because non-return valve doesn't work can make the gas back to the air duct to the air blower, because back gas high temperature (above 600 degrees), in the air pipe and air mixing, reached the blasting index, natural blasting, the result is quite serious.
(1) to ensure the tight sealing of the reverse check valve;
(2) after the power failure to increase the amount of steam to the furnace to send steam, to maintain the furnace positive pressure;
(3) after power failure, close the air valve at the fastest speed to block the passage into the air at the bottom of the furnace and prevent the air from entering the furnace and causing trouble.
(4) according to the gas outlet pressure, spread out, reduce the pressure of the furnace bottom, do not let the gas to the bellows flow back.
Note: after a power call, it is necessary to steam off the gas in the air main before it can be turned into normal operation.
6. Prevent blasting in furnace when hot preparation is transferred to normal production.
There are two kinds of blasting when the hot standby furnace turns to normal production, the first one is the burst blasting when the air is sent into the furnace, the second one is the burst blasting in the normal process of air supply.
The first blasting factor is: in the process of hot preparation, there is some gas back to the bellows, due to normal operation, some of this gas along with the air into the furnace, when the gas and air mix after the arrival of the blasting index, encounter oxidation layer of red fire burst.Its harm degree is quite severe, have concerned material to report, the destructive force that blast attack is enough to produce gas to produce furnace to tear, cause a fire.In order to prevent the incident, before starting the fan, it is necessary to clean the gas in the air pipe with steam.
The second kind of blasting factor: the temperature of oxidation layer in the furnace in the hot standby state is low, and even some oxidation layer fire has subsided.At this time if the wind pressure adjustment of the larger, the air into the furnace, some of the oxygen in the air in the oxide layer combustion, and at the other end of the air did not support combustion, but mixed in the gas burst.The way to eliminate this kind of blasting scene: first adjust the small air volume, wait for the oxidation layer evenly set up in the furnace, slowly add air volume.Together to pay attention to less coal, prohibit the practice of adding coal to a large number of furnace, after the oxidation layer into the normal, according to the furnace situation in more coal.
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