The whole purification system of the gas generator should maintain positive pressure operation, because the gas through the purification system all kinds of equipment and pipelines have a certain resistance loss, so must be strictly controlled from the semi-clean main to the net main pressure.The pressure of semi-clean main pipe is generally controlled at <1000 pa, and the pressure of clean main pipe should be controlled at >200 pa.In half 800 net manager, while the net manifold pressure generally can reach 400 ~ 600 mpa, depending on whether there is a washing tower packing, size and gas flow and decide, when washing tower packing, the more the greater is the resistance loss, net manager will reduce stress, when the greater the flow, the gas velocity, the pressure will reduce net manager.
Overpressure operation, that is, the purification system has been running at a pressure of more than 1000 pa is not allowed, because the purification system in the higher pressure operation, leakage phenomenon will be serious, and water and tar seal sometimes due to the sudden increase in pressure caused by the system water seal gas phenomenon.If high pressure operation is required, each water seal point must be designed according to the specification.
Low pressure operation is also not safe, because if the net main is in negative pressure, then there may be air leakage into the gas pipeline, it is not safe to operate in the exhaust machine, if the electric tar remover until the negative pressure produced by the inhalation of air is very prone to explosion.
Common problems of gas generator:
1, there will be a scale: the internal heated water jacket, evaporation and concentration, continuously for the impurity in water chemistry provides a variety of favorable conditions for the beginning of mass, some high temperature decomposition, some high temperature and precipitation, and some surface crystallization, complicated physical and chemical reaction, to hard sediment precipitation and clingy on boiler heating surface of metal, this is scaling.Due to the scale of the heat conduction ability was much lower than the metal, so the gas generator and fouling of heating surface, the heat transfer performance is significantly reduced, resulting in reduced gas generator output and fuel waste, the threat to gas producer, with perfect gas generator water treatment measures and reliable quality management system at the end of general scale damage will not occur.
2, there will be corrosion: the members of the gas generator furnace, when the metal and water contact, the impurities in the water will cause the metal surface to be damaged by electrochemical action.As a result, these metal members become thinner, have pits, and even perforate, which is the corrosion of the metal.More serious corrosion will damage the internal structure of the metal, metal strength significantly reduced.Therefore, corrosion causes damage to metal components, seriously affects the safe operation of the boiler, and shortens the service life of the gas producer.
3. Steam pollution: the saturated steam coming out of the drum is often stained by water, oil and a small amount of impurities.In the case of high content of impurities in the gas generator and improper operation of the boiler, it often happens that the water and oil in the pot is taken away by steam in large quantities, which is called the total steam.The steam is more seriously polluted when the steam is pumped.Likewise, superheated steam is contaminated by small water droplets and salts dissolved in the steam, carrying electricity and steam.
Zhengzhou keeneng machinery manufacturing co., LTD. Has long been engaged in the design, production, installation, commissioning, training and other technical services of gas generator.Contact number: 86-13676907460 email: zzkyjx·@163.com