外文翻譯---plc在蒸汽鍋爐汽包液位pid控制系統(tǒng)的應用分析-文庫吧
2025-01-02 23:35 本頁面
【正文】 had achieved the energy conservation falls the goal which consumes. The boiler is a more plex controlled member, provides the qualified steam for the guarantee to meet the load need, if the necessary design control system must satisfy each main craft parameter the need. Afterheat boiler technical process like chart 1 shows:3 controls difficulties analysisThe boiler puter control is a new technology which the recent years developed. It is the microputer soft, the hardware, the automatic control, the boiler energy conservation and so on several technical in close integration with product, as the boiler control device, its primary mission is guaranteed the boiler the security, is stable, the economical movement, reduces operator39。s labor intensity. Uses the micro puter control, can carry on the process to the boiler the automatic detection, the automatic control and so on many functions. It is adjusted the quantity is the steam drum water level, but adjusts the quantity is for the water current capacity, through to gives the water current capacity the adjustment, enables the steam drum interior the material to achieve the dynamical equilibrium, changes in the permission scope, although the boiler steam drum water level assumes the positive characteristic to the vapor current capacity and for the fluent quantity change response, but when load (vapor current capacity) sharp growth, performance actually similar counter response characteristic, namely socalled false water level. Creates this reason is because time load increase, causes the dome pressure to drop, causes the steam drum 內(nèi)水 boiling temperature to drop, the water ebullition suddenly intensifies, forms the massive steam bubbles, but makes the water level to raise. The steam drum water monitor system, in the essence is maintains the boiler turnover water volume balance the system. It is by the water level took the water volume balance or not control target, through adjusts the water volume how many to achieve the turnover balance, maintains the steam drum water level in the soft drink separation contact surface biggest steam drum nearby the position line, enhances the boiler the vaporization efficiency, the gua
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