How to achieve control of the boiler dryness?
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How to measure and control the steam dryness of a boiler? The focus is on measurement! Please ask the experts for help! This post was last edited by du*on on 2009-3-20 18:26]
Control of boiler dryness? Is it the control of saturated steam dryness? Superheated steam does not have an issue with dryness. First, control the water level properly; it should not be too high to ensure there is a sufficient space for proper separation between steam and water. Second, ensure that the soda separation equipment is working properly. Third, avoid foaming in the boiler water (to maintain the quality of the boiler water and prevent a significant drop in pressure). Everyone, please add more.
Perfectly dry steam does not exist; the saturation humidity of steam is related to temperature. The presence of water in the steam as well as low steam temperatures can both lead to an increase in the moisture content of the steam. In industrial boilers, measurement of dryness is not a thing, but the steam temperature can provide an indication of the steam’s saturation humidity
Add a water inlet automatic control valve, a level controller, and a bypass line, and that’s it
The main thing is to have a good soda separator! If the effect is good, the dryness level can be guaranteed!
Is it the control of the cycle multiplier? The circulation ratio refers to the ratio of the water flow rate through the circulation loop to the amount of steam it generates. Its physical meaning is: how many times the water entering the circulation loop needs to circulate before it can all be converted into steam. The circulation ratio is generally expressed in units of K.
The dryness of the steam is primarily determined by the efficiency of the steam-water separator; to achieve the desired level of steam dryness, it is necessary to improve the steam-water separator； To measure the steam dryness, a steam sampler can be installed on the drum.
First of all, thank you all for your enthusiastic responses! I think my initial description of the problem was inadequate. The question should be this: If a boiler is required to supply steam with a certain degree of dryness, that is, wet steam that meets the specified dryness requirements, how should this be controlled? If the device inside the pot cannot adjust itself under different loads, then what methods can be used to control the dryness of the steam produced? Thank you all for sharing your thoughts freely.
When conditions permit, adjusting the boiler water level can control the dryness. For example, if steam with a higher humidity is required, the water level should be increased to reduce the space for steam and water to separate; as a result, more water is carried in the steam, and its dryness level naturally decreases. Drier steam is required; the water level should be lowered as much as possible while maintaining the minimum safe level. Adjusting the water level is the simplest way to control the dryness. There is another method: installing a water injection device on the steam line, using which to control the dryness of the steam. I’m not sure – isn’t it true that the lower the steam humidity, the better? This post was last edited by Qin Yu on 2009-3-23 21:05.]