A method and system for coordinating parent tube boilers

Abstract

The invention discloses a method for coordinating a mother tube boiler, which is used for coordinating at least two boilers, including: obtaining the optimal original distribution coefficient corresponding to each boiler based on the resistance loss value corresponding to each boiler from the steam turbine, and real-time Obtain the output change value of the steam turbine; obtain the maximum distribution coefficient of each boiler based on the output change value, the current load of each boiler, the upper limit value of the load and the lower limit value of the load; obtain the final distribution coefficient based on the maximum distribution coefficient and the original distribution coefficient of each boiler The distribution coefficient, and the actual adjusted load of each boiler is obtained through the output change value and the final distribution coefficient of each boiler. In the above method, at the initial stage of distribution, the original distribution coefficient of each boiler is conditionally distributed based on the difference in the resistance loss value of different boilers, so that the original distribution coefficient can be determined more accurately and the pipeline loss can be guaranteed to be the lowest. The invention also discloses a coordinating system of a mother tube boiler.

Description

Technical field [0001] The invention relates to the technical field of thermal system control, and more specifically, to a coordination method for a mother-controlled boiler. In addition, the present invention also relates to a coordination system for a parent-controlled boiler. Background technique [0002] At this stage, the thermal system control field is usually formed by the boiler steam turbine master control unit. Under normal circumstances, one boiler is automatically controlled, and the other boilers are manually controlled. The reason is that when two or more boilers are put into automatic control at the same time, because the outlet pipes of the boiler are connected, the automatic operation of multiple boilers is prone to vibration and mutual interference, which makes it impossible to put into automatic control at the same time. [0003] In order to solve this problem in the prior art, a coordinated control system is usually used to adjust all boilers synchronously. Al...

AI Technical Summary

Problems solved by technology

The reason is that when two or more boilers are put into automatic control at the same time, since the outlet pipes of the boilers are connected, multiple boilers that are put into automatic control are prone to vibration and mutual interference, which makes it impossible to put into automatic control at the same time.

[0003] In order to solve this problem in the prior art, a coordinated control system is usually used to adjust all boilers synchronously. Although such a setting can solve the problem of oscillation, due to the characteristics of the boilers and the different arrays on the main pipe and the loss of the pipes, If the synchronous adjustment will lead to low overall efficiency, and some boiler outlet pressures will be super high or low.

Another method is that the system pre-sets a fixed boiler distribution coefficient. When the external load changes too much, or the boiler load is close to the maximum load or minimum load boundary after a period of operation, the distribution coefficient cannot match the current working condition. Unreasonable coefficient distribution will cause the load distributed by the boiler to be unable to be effectively and fully implemented

Neither of the above two situations can reduce the pipeline loss, which affects the overall efficiency of the unit

Images