JPH10213303A - Boiler load distribution control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform the high-efficient and safe feed of steam by providing a pressure increase/decrease direction discriminating means to update the output of a steam flow rate regulating means when the output of a steam pressure regulating means to effect correction addition on a total flow rate of steam and the output of a steam flow rate regulating means to fetch a steam flow rate regulation signal are a like-pole or one of the two outputs is zero. SOLUTION: A steam flow rate regulating means 10 comprises a switch means 13 to perform update control of a steam flow rate regulation signal fetched by a speed type stem flow rate regulation means 12 based on a deviation signal from a deviation computing means 11 to calculate a generation steam flow rate command signal, forming a target signal for each of boilers 11 -1n and an actual generation steam flow rate signal for steam flow rate detectors 21 -2n ; and a speed type/position type signal converting means 14 to convert a regulation signal into a regulation signal for correction. Each of increase/decrease direction discriminating means 20 comprises a code discriminating means 22 to effect electrical connection of a switch means 13 when the result of a multiplying means 21 to multiply the output of a steam pressure regulating means 6 and the output of a speed type steam flow rate regulating means 12 is zero or a value higher than zero.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to an improvement in a boiler load distribution control device used for load distribution control of a plurality of boilers operated in parallel.

[0002]

2. Description of the Related Art Generally, in a steam generating facility such as a factory, a plurality of boilers are operated in parallel so that a good efficiency can be obtained with respect to a consumption amount of steam and a desired operation mode can be met. In addition, the load distribution ratio is changed according to the size of the boiler. Therefore, each boiler is operated based on the set load distribution ratio.

FIG. 6 is a system configuration diagram of a conventional boiler load distribution control device having a plurality of (N) boilers operated in parallel. The control device, the boiler 1 ₁ in each boiler 1 ₁ to 1 steam respectively attached to the _N flow sensor 2 ₁ to 2 _N
The generated steam flow rate of １1 _N is detected and introduced into the first adding means 3. The first addition means 3 adds and synthesizes the generated steam flow rates detected by the respective steam flow rate detectors 2 ₁ to 2 _N to obtain a total steam flow rate signal, and then introduces the signal into the second addition means 4.

On the other hand, the steam pressure detector vapor pressure of the representative point in the common header which each boiler 1 ₁ to 1 _N is connected 5
The detection signal is input to the steam pressure adjusting means 6 as a feedback signal. This steam pressure adjusting means 6
Compares the feedback signal with the desired steam pressure set value Ps and determines that the actual steam pressure is the desired steam pressure set value Ps
The adjustment calculation is executed so as to coincide with the equation (1), and the obtained adjustment calculation output is guided to the second adding means 4 to be added to the total steam flow rate signal.

Next, the output signal of the second adding means 4 is:
Load distribution coefficient setting means 7 ₁ to 7 having load distribution coefficients α _{1 to} α _N so that good operation and efficiency can be obtained for each boiler.
7 _N are introduced into, wherein the second steam load distribution coefficient to an output signal of the adding means 4 alpha ₁ to? Multiplied by _N each boiler 1 ₁ to 1 _N
Removed generation steam flow rate command signal to have been introduced into the steam flow rate adjusting means 8 ₁ to 8 _N and the correction means 9 ₁ to 9 _N.

[0006] In this steam flow rate adjustment means 8 ₁ to 8 _N, for example a target signal generated steam flow command signal at predetermined time intervals, the actual generation steam flow rate signal outputted from the steam flow rate detector 2 ₁ to 2 _N As a feedback signal, a proportional / integral adjustment operation is performed based on the deviation between the target signal and the feedback signal to obtain an adjustment signal for steam flow rate correction. Then, the control signal for correcting the steam flow rate is
In ₁ to 9 _N is added to each of the generated steam flow command signal,
Correction is performed so that each generated steam flow rate command signal matches the actually generated steam flow rate signal. Thereafter, these corrected generated steam flow signal is introduced into each of the boilers 1 ₁ to 1 _N, the combustion amount of each boiler 1 ₁ to 1 _N on the basis of the command signal is controlled to adjust the steam generation amount It has a configuration.

[0007]

[SUMMARY OF THE INVENTION However, the boiler load distribution controller as described above, the difference in dynamic characteristics and efficiency of the boiler 1 ₁ to 1 _N are operated in parallel, the steam pressure decreases steam output signal is positive pressure adjusting means 6, i.e. even if a request is made to increase the steam flow rate, the difference response coming from the size of each boiler 1 ₁ to 1 _N, each boiler steam flow rate adjustment means 8 The output signals of ₁ to 8 _N are not necessarily in the direction of increasing the steam flow rate, and each boiler ₁₁ to 1 _N
There is a problem that the direction of increase / decrease is varied every time, the steam pressure fluctuates, and it takes a long time to settle. This means that even if the steam consumption changes, the steam pressure control system that controls the steam pressure at a constant level and supplies high-quality steam and the parallel operation boiler accurately follow each other based on the respective load distribution command values. This is because the steam flow control systems of the boiler operate in an independent relationship and, as a result, interfere with each other.

[0008] In the future, in the control system of a parallel operation boiler, which is a steam generation source of a factory or the like, in order to save energy, stabilize product quality and ensure safety, more and more accurate steam pressure control and load distribution follow-up will be performed. Since high speed and high accuracy are required, it is necessary to solve the above problems.

The present invention has been made in view of the above circumstances, and eliminates mutual interference, ensures high accuracy of steam pressure control and quick response control for load distribution, and provides more efficient steam with higher efficiency and stability. It is an object of the present invention to provide a boiler load distribution control device capable of supplying to a boiler load.

[0010]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a boiler load distribution system for distributing the total steam flow generated from a plurality of boilers operated in parallel and controlling each of the boilers. A controller for calculating a steam pressure adjustment signal from a deviation signal between a steam pressure at a common representative point on the output side of each of the boiler groups and a predetermined set value, and adding the signal to the total steam flow rate; Load distribution coefficient setting means for calculating a generated steam flow rate command signal for each boiler by multiplying the total steam flow to which the steam pressure adjustment signal of the pressure adjusting means is added by a desired load distribution coefficient, and the load distribution coefficient setting means. Steam flow rate adjusting means for executing a control operation using a target value which is a generated steam flow rate command signal of each boiler and an actually generated steam flow rate of the corresponding boiler and extracting a steam flow rate control signal, When the processing signal of the air pressure adjusting means and the processing signal of the steam flow adjusting means corresponding to each boiler have the same polarity or any of them is zero, the output of the steam flow adjusting means is updated, or the two processing signals have different polarities. When the pressure increase / decrease direction discriminating means inhibits the output update of the steam flow rate adjusting means, and the load distribution coefficient setting means is generated by using the output of the steam flow rate adjusting means updated or inhibited by the pressure increase / decrease direction discriminating means. And a correction means for correcting the steam flow rate command signal, and the boiler load distribution control device for following and controlling the steam flow rate of the corresponding boiler based on the output signal of the correction means.

Therefore, the present invention, by taking the above measures, makes the steam pressure increasing / decreasing directions of the steam pressure adjusting means coincide with the increasing / decreasing directions of the steam flow rate adjusting means of each boiler. When the steam consumption changes, only the steam flow control in the direction corresponding to the increasing / decreasing direction of the steam pressure is executed, so the mutual interference between the steam pressure control and the steam flow control of each boiler and the Mutual interference between steam flow control can be eliminated, and high-precision steam pressure control and prompt response control to load distribution can be ensured. As a result, high-quality steam can be supplied with high efficiency and stability.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a system configuration diagram showing an embodiment of the first aspect of the present invention. 6, the same reference numerals are given to the same functional components as those in FIG. 6 which is the related art, and the detailed description of the same functional components is omitted.

The difference between this control device and the conventional device is, in particular, the steam flow rate adjusting means 10 ₁ to 10 _{N for} obtaining the correction steam flow rate and the increasing / decreasing direction discriminating means 20 _{1 to} 20 for judging the increasing / decreasing direction of the steam pressure. _N has been established.

[0014] Therefore, other parts, i.e. the steam flow rate detector 2 ₁ to 2 _N for detecting the occurrence steam flow of a plurality of the boiler 1 ₁ to 1 _N being parallel operation, these detectors 2 ₁ to 2
First adding means 3 for adding and synthesizing the generated steam flow rate of _N to calculate a total steam flow rate signal; a steam pressure detector 5 for detecting a steam pressure at a common representative point on the output side of each boiler group; The actual steam pressure of the vessel 5 is the desired steam pressure set value P
s, a steam pressure adjusting means 6 for executing the adjusting operation so as to coincide with s, and giving a higher priority to the pressure increasing / decreasing directions for extracting the pressure adjusting signal, a steam pressure adjusting signal obtained from the steam pressure adjusting means 6, second addition means for adding the total steam flow signal 1 of the adding means 3 4, each load distribution coefficient setting means for setting a load distribution coefficient for each boiler 7 ₁ to _7-N and the correction means 9 ₁ to 9 _N, etc. Has the same configuration as the conventional device.

Each of the steam flow rate adjusting means 10 ₁ to 10 _N
, The output signal of the load distribution coefficient setting means 7 ₁ to _7-N, i.e. the detection signal of each boiler 1 ₁ to 1 generates steam flow rate command signal as a target signal of _N and steam flow rate detector 2 ₁ to 2 _N, that is Deviation calculating means 11 for calculating a deviation from the actually generated steam flow rate signal serving as a feedback signal;
Speed type steam flow rate adjusting means for executing a speed type P (P: proportional) I (I: integral) or PID (D: differential) adjustment operation based on the deviation signal calculated in step 1 and extracting a speed type steam flow rate adjustment signal 12 and the speed type steam flow control means 12
Switch means 13 for updating or inhibiting the speed type steam flow rate control signal obtained in
And a speed-type / position-type signal converting means 14 for converting a speed-type control signal passing through the control means into a position-type steam flow rate correction control signal.

[0016] Each of decreasing direction determination means 20 ₁ to 20 _N
Multiplying means 21 for multiplying the output of the steam pressure adjusting means 6 and the output of the speed type steam flow rate adjusting means 12; and when the result of the multiplication by the multiplying means 21 is zero or larger than zero, the switching means 13 And a code discriminating means 22 for conducting the current.

Next, the operation of the above apparatus will be described. First, when the steam flow rate detector 2 ₁ to 2 _N inputs to the first addition means 3 detects the actual occurrence steam flow rate of each boiler 1 ₁ to 1 _N corresponding, the first addition means 3 each boiler The total generated steam flow rate is obtained by adding and synthesizing the actually generated steam flow rates of ₁₁ to 1 _N , and is introduced into the second adding means 4.

On the other hand, when the steam pressure detector 5 detects the steam pressure at the representative point of the steam common header on the outlet side of each boiler and introduces it as a feedback signal to the steam pressure adjusting means 6, the steam pressure adjusting means 6 performs feedback. The signal is compared with a desired steam pressure set value Ps, and an adjustment operation is performed so that the actual steam pressure matches the desired steam pressure set value Ps, and a steam pressure adjustment signal is taken out and sent to the second adding means 4. Introduce.

[0019] The second adding means 4, after the steam pressure adjusting signal obtained by the steam pressure adjusting means 6 by adding synthesized total steam flow signal, the load distribution coefficient setting which corresponds to the boiler 1 ₁ to 1 _N Input to the means 7 _{1 to} 7 _N , where they are multiplied by the load distribution coefficients α _{1 to} α _N (α ₁ +... + Α _N ) to calculate the generated steam flow rate command signal of each boiler.
Input to the ₁ to 10 _N and the correction means 9 ₁ to 9 _N.

In the steam flow rate adjusting means 10 ₁ to 10 _N , the deviation calculating means 11 uses the load distribution coefficient setting means 7 ₁ to
7 _N of generating steam flow command signal and the steam flow rate detector 2 ₁ -
After obtaining a deviation signal from the actually generated steam flow rate signal detected at 2 _N, it is introduced into the speed type steam flow rate adjusting means 12. The speed type steam flow rate adjusting means 12 executes a PI or PID adjustment operation based on the deviation signal, and converts the obtained speed type steam flow rate adjusting signal via the switch means 13 into a speed type / flow rate adjusting signal.
It led to a position type signal converting means 14, where is converted into a position type steam flow rate adjustment signal, input to each correction unit 9 ₁ to 9 _N.
That is, by adding the position-type steam flow rate control signal obtained from the speed type / position type signal conversion means 14 to the generated steam flow rate command signal, each generated steam flow rate command signal and the actual generated steam flow rate signal match. to correct.

[0021] On the other hand, increase and reduction direction determination means 20 ₁ ~20 _N
Leads the steam pressure adjusting signal Pc output from the steam pressure adjusting means 6 and the speed type steam flow rate adjusting signals ΔF ₁₁ to ΔF _1N of the speed type steam flow rate adjusting means 12 _,. A multiplication process is performed, and the result of the multiplication is determined by a sign determination unit 2
Input to 2, ... Each of the code discriminating means 22,... Has a relationship (Pc × △) in which the signal of the multiplication result is zero or larger than zero.
When F ₁₁ (ＦF _1N ) ≧ 0, that is, when the steam pressure adjustment signal Pc and the speed-type steam flow rate adjustment signal ΔF ₁₁ (〜F _1N ) have the same polarity, in other words, increase / decrease of the steam pressure adjustment signal Pc increasing the reduction direction and velocity type steam flow rate adjustment signal △ F ₁₁ (~F _1N) ·
When the decrement direction coincides or when either one of them is zero, the switch means 13 is turned on, and the speed-type steam flow control signal ΔF of the speed-type steam flow control means 12,.
₁₁ (to F _1N) guidance to the signal converting means 14 by way of the switching means 13, where seeking adjustment signal for position-shaped steam flow rate correction is input to the correction means 9 ₁ to 9 _N.

These correcting means 9 _{1 to} 9 _N add a position-type steam flow rate correction control signal to each generated steam flow rate command signal so that each generated steam flow rate command signal and the actually generated steam flow rate signal match. to correct. Thereafter, these corrected generated steam flow command signal is introduced into each of the boiler 1 ₁ to 1 _N, and controls the combustion amount of each boiler 1 ₁ to 1 _N on the basis of the command signal, adjust controlling steam generation amount I do.

[0023] Thus, increasing of the thus according to the embodiment configured, the steam flow rate adjustment signal of the steam flow rate control means 10 ₁ to 10 _N to increase, decrease direction of the steam pressure adjusting signal of the steam pressure adjusting means 6 By controlling the deceleration directions to be the same, it is possible to make the steam flow control of each boiler follow the steam pressure control in a stable manner and follow the steam pressure control stably.

As a result, the controllability of the steam pressure control is improved, and the steam flow control of each boiler does not operate individually.
Mutual interference between the steam pressure control and the respective steam flow rate controls and between the respective steam flow rate controls are completely eliminated, and the stability and safety of the entire control can be improved.

Next, FIG. 2 is a system configuration diagram showing one embodiment of the invention according to claim 2. In this figure, the same reference numerals are given to the same functional components as those in FIG. 6 and FIG. 1 of the prior art, and the detailed description of the same functional components is omitted.

[0026] In this control device is almost the same configuration as FIG. 1, in particular different from the steam flow rate adjusting means 10 ₁ to 10 _N switch means 13 'and increase and reduction direction discrimination means constitutes a part of the code discriminating means constitutes a part of the 20 ₁ ~20 _N 22 ', it is an improvement of the ....

More specifically, as a function of the code discriminating means 22 ', a function of detecting that the value is equal to or less than zero, that is, a so-called Pc
× △ F ₂₁ (〜F _2N ) <0, that is, the steam pressure adjustment signal Pc and the speed type steam flow rate adjustment signal ΔF ₂₁ (（F _2N ) of the corresponding boiler which is the output of the speed type steam flow rate adjusting means 12 Is the opposite sign, in other words, the direction of increase / decrease of the steam pressure adjustment signal Pc and the speed type steam flow rate adjustment signal ΔF ₂₁ (（F
_2N ) when the increasing / decreasing directions are opposite, switch means 1
3 ′,... Are made non-conductive, the speed-type steam flow control signals ΔF ₂₁ (〜F) of the speed-type steam flow control means 12,.
_2N ) is prohibited, and the adjustment signal for position type steam flow rate correction already stored in the signal conversion means 14,.
4, ... to correct each generated steam flow command signal,
The direction of increase / decrease of the steam pressure adjustment signal Pc and the speed type of the corresponding boiler The direction of increase / decrease of the steam flow rate control signal ΔF ₂₁ (ＦF _2N ) has the same polarity or a speed type until any signal becomes zero. It waits for the update of the steam flow control signal △ F ₂₁ (NF _2N ).

Therefore, the device shown in FIG. 2 can obtain the same effect as that of FIG. 1 except that the device shown in FIG. FIGS. 3 and 4 are system configuration diagrams showing one embodiment of the invention according to claim 3. FIG. In these drawings, the same functional components as those in FIGS. 1 and 2 are denoted by the same reference numerals, and detailed description thereof will be omitted.

[0029] Figure 3, steam pressure adjustment signal Pc and the velocity type steam flow rate adjusting means 12 1 and likewise increase and reduction direction discrimination means 20 ₁ to 20 _N is the output of the steam pressure adjusting means 6, ... speed of form steam flow rate adjustment signal △ F ₁₁ ~ △ F _1N and the takes in multiplication means 21, by multiplying ... in, when the sign discriminating means 22, ... signal multiplication result is greater than zero or zero, i.e. steam pressure When the control signal Pc and the speed-type steam flow control signal ΔF ₁₁ (（ΔF _1N ) have the same polarity or one of the two signals is zero, the switch means 13 is turned on. means 21, as a signal ... captures from the steam flow rate control means 10 ₁ to 10 _N, 1
In FIG. 3, the speed type steam flow rate control signals △ F ₁₁ to △ F _1N are taken in. However, FIG.

Even in such an embodiment, whether the polarity of the deviation signal of each of the steam flow rate adjusting means 10 ₁ to 10 _N is the same as the polarity of the steam pressure adjusting signal Pc output from the steam pressure adjusting means 6, Alternatively, when any signal is zero, the same functions and effects as those in FIG.

FIG. 4 is a view similar to FIG.
The steam pressure adjusting signal Pc, where 0 _{1 to} 20 _N is the output of the steam pressure adjusting means 6, and the speed type steam flow rate adjusting signals ΔF ₂₁ to ΔF _2N of the speed type steam flow rate adjusting means 12 _,. , By multiplying by two,...
When the signal of the multiplication result is equal to or smaller than zero in 2 ′,..., That is, the steam pressure adjustment signal Pc and the speed type steam flow rate adjustment signal ΔF ₂₁
(~ △ F _2N) when the is different polarities, as the signal will be non-conductive switch means 13 ', taking this time multiplying means 21, ... from the steam flow rate control means 10 ₁ to 10 _N, 2
In FIG. 4, the speed type steam flow rate control signals △ F ₂₁ to △ F _2N are fetched, but FIG. 4 shows an example in which the deviation signal obtained by the deviation calculation means 11 is fetched and multiplied.

Even in such an embodiment, when the polarity of the deviation signal of each of the steam flow rate adjusting means 10 ₁ to 10 _N is different from the polarity of the steam pressure adjusting signal Pc output from the steam pressure adjusting means 6. 2 has the same functions and effects as those of FIG.

Next, FIG. 5 is a system configuration diagram showing an embodiment of the invention according to claim 4. In these drawings, the same functional components as those in FIGS. 1 and 2 are denoted by the same reference numerals, and detailed description thereof will be omitted.

[0034] This embodiment is similar to FIG. 3 and FIG. 4, steam pressure adjustment signal Pc and the velocity type steam flow rate adjustment is increased and reduction direction discrimination means 20 ₁ to 20 _N are output of the steam pressure adjusting means 6 The speed-type steam flow control signal of the means 12,... Is led to the multiplying means 21.
3, the switch means 13 'is non-conductive when the polarities are different.

At this time, the multiplying means 21,... Are output from the steam pressure adjusting means 6 in FIGS. 1 to 4 as signals taken in from the steam pressure adjusting means 6. In this case, as shown in FIG. 5, a deviation calculating means 61 for calculating a deviation between the steam pressure and a predetermined steam pressure set value, a speed type steam pressure adjusting section 62 for executing a PI or PID adjustment operation based on the deviation signal.
And a speed-type / position-type signal converting means 63 for converting the speed-type steam pressure adjusting signal obtained by the adjusting section 62 into a position-type steam pressure adjusting signal. Any one of a certain position type steam pressure adjustment signal, a deviation signal between the steam pressure and a predetermined steam pressure set value, and a speed type steam pressure adjustment signal obtained by performing a speed type adjustment operation based on the deviation signal. The same function and operation and effect can be obtained even with a configuration in which two signals are fetched and multiplied.

[0036]

As described above, according to the present invention, the control is performed such that the increasing / decreasing directions of the steam flow rate adjusting signals of the respective boilers coincide with the increasing / decreasing directions of the steam pressure adjusting signals. The steam flow control of each boiler can follow and follow each generated steam flow command signal while keeping pace with the direction of control, improving the controllability of steam pressure control and improving the steam flow of each boiler. The control does not operate individually, the direction of increase / decrease coincides, the mutual interference between steam pressure control and each steam flow control and the mutual interference between each steam flow control are completely eliminated, and the stability and safety of the entire control system Can be provided.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram showing one embodiment of a boiler load distribution control device according to the invention of claim 1;

FIG. 2 is a system configuration diagram showing an embodiment of a boiler load distribution control device according to the invention of claim 2;

FIG. 3 is a system configuration diagram showing an embodiment of a boiler load distribution control device according to the invention of claim 3;

FIG. 4 is a system configuration diagram showing another embodiment of the boiler load distribution control device according to the invention of claim 3;

FIG. 5 is a system configuration diagram showing one embodiment of a boiler load distribution control device according to the invention of claim 4;

FIG. 6 is a system configuration diagram of a conventional boiler load distribution control device.

[Explanation of symbols]

1 ₁ to 1 _N ...... boiler 2 ₁ to 2 _N ...... steam flow rate detector 5 ...... steam pressure detector 6 ...... steam pressure adjusting means 7 ₁ to _7-N ...... load distribution coefficient setting means 9 ₁ to 9 _N ...... correcting means 10 ₁ to 10 _N ... steam flow rate adjusting means 13, 13 '... switch means 20 ₁ to 20 _N ... decreasing direction discrimination means 21 ... multiplying unit 22 ...... code discriminating means

Claims (4)

[Claims] 1. A boiler load distribution control device which distributes the total steam flow generated from a plurality of boilers operated in parallel and controls each of the boilers, comprising: a common representative point on the output side of each of the boiler groups; A steam pressure adjusting means for calculating a steam pressure adjusting signal from a deviation signal between the steam pressure and a predetermined set value and adding the calculated signal to the total steam flow rate; a steam pressure adjusting signal of the steam pressure adjusting means being added to the total steam flow rate Load distribution coefficient setting means for calculating a generated steam flow rate command signal of each boiler by multiplying by a desired load distribution coefficient; a target value which is a generated steam flow rate command signal of each boiler obtained by the load distribution coefficient setting means; A steam flow control means for executing a control operation using the actual generated steam flow rate and extracting a steam flow control signal; a processing signal of the steam pressure control means and a steam corresponding to each boiler. When the processing signal of the flow rate adjusting means has the same polarity or any one is zero, the pressure increase / decrease direction discriminating means for updating the output of the steam flow rate adjusting means corresponding to the own boiler, and using the output of the steam flow rate adjusting means Correction means for correcting the generated steam flow rate command signal output from the load distribution coefficient setting means, and the tracking control of the steam flow rate of the corresponding boiler based on the output signal of the correction means. Boiler load distribution control device. 2. A boiler load distribution control device for distributing the total steam flow generated from a plurality of boilers operated in parallel and controlling each of the boilers, comprising a common representative point on the output side of each of the boiler groups. A steam pressure adjusting means for calculating a steam pressure adjusting signal from a deviation signal between the steam pressure and a predetermined set value and adding the calculated signal to the total steam flow rate; a steam pressure adjusting signal of the steam pressure adjusting means being added to the total steam flow rate Load distribution coefficient setting means for calculating a generated steam flow rate command signal of each boiler by multiplying by a desired load distribution coefficient; a target value which is a generated steam flow rate command signal of each boiler obtained by the load distribution coefficient setting means; A steam flow control means for executing a control operation using the actual generated steam flow rate and extracting a steam flow control signal; a processing signal of the steam pressure control means and a steam corresponding to each boiler. When the processing signal of the flow rate adjusting means has a different polarity, a pressure increase / decrease direction determining means for stopping the output update of the steam flow rate adjusting means, and an output from the load distribution coefficient setting means using the output of the steam flow rate adjusting means. And a correction means for correcting the generated steam flow rate command signal to be performed, and a follow-up control of the steam flow rate of the corresponding boiler based on the output signal of the correction means. 3. A processing signal of the steam flow rate adjusting means is a deviation signal between a boiler generated steam flow rate command signal and an actual generated steam flow rate of the boiler, and a speed type obtained by performing a speed type adjustment operation based on the deviation signal. The boiler load distribution control device according to claim 1 or 2, wherein the control signal is any one of the steam flow control signals. 4. The processing signal of the steam pressure adjusting means is:
A position type steam pressure adjustment signal which is an output of the steam pressure adjusting means, a deviation signal between the steam pressure and a predetermined set value, a speed type steam pressure adjustment signal obtained by performing a speed type adjustment operation based on the deviation signal. The boiler load distribution control device according to claim 1 or 2, wherein the signal is any one of the following signals.