A Method of Determining the Optimum Main Pipe Pressure of Boiler Feed Water Frequency Conversion Regulation System
A technology of main pipe pressure and boiler feed water, applied in the direction of control of water supply, lighting and heating equipment, steam generation, etc., can solve the problems of no energy saving effect, frequent equipment damage, high temperature, etc., to ensure safe and economical operation, safe and stable operation Effect
Active Publication Date: 2019-08-27
ANGANG STEEL CO LTD
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Problems solved by technology
[0002] At present, the feed water pump is the main equipment of the boiler water supply system. The main pipe is used to supply water to multiple boilers running in parallel, and the boiler water level is guaranteed to operate at a normal value through the respective feed water regulating valves. The energy waste is serious and the equipment is frequently damaged. After the frequency conversion transformation of the feed water pump In order to ensure the safety of water supply for multiple boilers running in parallel, the pressure of the main pipe is still running at a high position, resulting in the long-term operation of the inverter above 48.5Hz, which has no energy-saving effect
And the inverter runs under this condition, the temperature is high, and the equipment is frequently damaged
There are many hidden dangers in the safe and economical operation of boilers
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[0020] The specific embodiments provided by the present invention will be described in detail below in conjunction with the accompanying drawings.
[0021] A method for determining the optimum main pipe pressure of a boiler feed water frequency conversion regulation system, wherein the control of the boiler feed water frequency conversion regulation system includes two closed-loop adjustment processes: the main pipe pressure-the closed-loop adjustment process of the water pump frequency converter, and the steam drum water level-adjustment Valve closed-loop regulation process.
[0022] Before the closed-loop adjustment process of the main pipe pressure-water pump inverter, first determine the optimal main pipe pressure setting value P of the boiler feed water system ZJ , take it as the main pipe pressure-the pressure setting value of the closed-loop regulation system of the frequency converter of the water pump; figure 1 As shown, the determination of the optimal header pipe p...
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The invention provides a method for determining the best main-piping pressure of a boiler feed water variable-frequency regulating system. A set value PZJ of the best main-piping pressure of the boiler feed water system is determined by the steps that an initial value P0=kPq of the set value of the main-piping pressure is set; the boiler feed water regulating system is operated, frequency of a frequency converter is reduced manually, and when a main-piping pressure value reduces to an initial value P0, regulating of the frequency of the frequency converter is stopped; opening degree of a regulating valve at this moment is observed, and if the opening degree of the valve is 80%-90% at this moment, regulating is stopped; and if the opening degree of the valve is lower than 80%, the initial value P0 of the set value of the main-piping pressure is reduced, if the opening degree of the valve is higher than 90%, the initial value P0 of the set value of the main-piping pressure is increased,and regulating is stopped until the opening degree of the valve is 80%-90%. According to the method for determining the best main-piping pressure of the boiler feed water variable-frequency regulatingsystem, the operating frequency of the frequency converter is not simply relied on to regulate water level of a boiler, the operating frequency of the frequency converter controls feed water main-piping pressure to operate at an optimum value, and the water level of the boiler is finely adjusted and controlled through corresponding feed water regulating value at the pressure to achieve the effectof energy conservation and equipment safety protection.
Description
technical field [0001] The invention relates to the technical field of energy-saving control, in particular to a method for determining the optimum main pipe pressure of a boiler feed water frequency conversion regulation system. Background technique [0002] At present, the feed water pump is the main equipment of the boiler water supply system. The main pipe is used to supply water to multiple boilers running in parallel, and the boiler water level is guaranteed to operate at a normal value through the respective feed water regulating valves. The energy waste is serious and the equipment is frequently damaged. After the frequency conversion transformation of the feed water pump In order to ensure the safety of water supply for multiple boilers running in parallel, the pressure of the main pipe is still running at a high position, resulting in the long-term operation of the inverter above 48.5Hz, which has no energy-saving effect. And the frequency converter runs under this...
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IPC IPC(8): F22D5/20
Inventor 郑波黄显保
Owner ANGANG STEEL CO LTD