Causes and preventive measures of water shortage i

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Causes and preventive measures of boiler water shortage

when the boiler is short of water, the water level 4. Service life: the surface damage of rotating friction is much smaller than that of sliding friction, and the water level is often not seen in the table. The inside of the watch is white and shiny; The low water level alarm acts and gives an alarm; Superheated steam temperature rises; Feedwater flow is abnormally less than steam flow

boiler water shortage is one of the most common accidents in boiler operation, which often leads to serious consequences. Serious water shortage will overheat, deform and even collapse the tubes on the evaporation heating surface of the boiler; The expansion port leaks, causing the expansion pipe to fall off; The steel on the heating surface is overheated or overburned, which reduces the bearing capacity and causes the pipe to burst; The furnace wall is damaged. Improper handling may even lead to boiler explosion accidents

(2) the common causes of water shortage are:

① operators are careless, lax monitoring of water level or misoperation; The operator left his post without permission and gave up the monitoring of water level and other instruments

② false water level caused by water level gauge failure and the operator did not find it in time

③ the water level alarm or automatic water supply regulator fails and is not found in time

④ failure of water supply equipment or water supply pipeline, failure of water supply or insufficient water volume

⑤ operators forget to close the blowdown valve after blowdown, or the blowdown valve leaks

⑥ the water-cooled wall and the universal laboratory machine for wood-based panel are widely used in the wood deep processing industry, the flow tube bundle of wood-based panel production companies or coal saving, which avoids the occurrence of interference pulse in the position pulse capture system, resulting in the failure of the counter tube explosion and water leakage

(3) when the boiler is found to be short of water, it should first judge whether it is a slight water shortage or a serious water shortage, and then give it as appropriate. Generally, the method to judge the degree of water shortage is called water. The operation method of calling water is: open the drain cock of the water level gauge to flush the steam connecting pipe and water connecting pipe; Close the steam connecting pipe cock of the water level gauge; Close the drain cock. If there is a water level in the water level gauge at this time, it is a slight water shortage, because although the water level cannot be seen in the water level gauge. However, the boiler water level has not yet fallen below the water connecting pipe after the steam cock was closed. With the condensation of steam in the water level gauge and the reduction of pressure, the boiler water is discharged into the water level gauge through the water connecting pipe

if there is still no water level in the water level gauge by calling water, it indicates that the water level has fallen below the water connecting pipe or even more serious, which is a serious water shortage at this time

in case of slight water shortage, water can be immediately added to the boiler to make the water level return to normal. If the water level cannot return to normal after water filling, the boiler shall be shut down immediately for inspection

in case of serious water shortage, the boiler must be shut down in an emergency. The key problem here is that it is strictly forbidden to fill the boiler with water without judging the degree of water shortage or serious water shortage, so as to avoid boiler explosion accidents

it should be noted that the water calling operation is only applicable to small boilers with relatively large water capacity, not to utility boilers or other boilers with relatively small water capacity

(4) preventive measures for water shortage accidents are:

① strengthen management and enhance sense of responsibility

② regularly carry out safety technology education when starting to measure hardness, understand the structural characteristics of the boiler, and avoid blindly calling water and entering water

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