JP2773629B2 - Steam supply use system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a steam supply system comprising a steam-using facility for using steam, such as a heater or a food machine, and a steam-generating facility including a plurality of steam generating means for supplying steam to the steam-using facility. It relates to the system used.

[0002]

2. Description of the Related Art In such a steam supply and use system, control of steam supply to a steam use facility, that is, control of a steam valve provided in a steam supply line and control of steam generation means of a steam generation facility are independently performed. Was common. In the conventional steam generating equipment of the conventional system, as shown in JP-B-62-27321, when the steam usage load changes, the steam pressure of the steam collecting header at the outlet side of a plurality of steam boilers is detected and the steam boiler is detected. In general, the amount of steam supplied is controlled by controlling the combustion and the number of fuel cells.

[0003]

However, in such a conventional system, the fluctuation of the load due to the opening and closing of the steam valve is indirectly detected by the steam pressure. There has been a problem that more than the required number of steam boilers are started due to pressure fluctuations, and starting and stopping the steam boilers lowers the combustion efficiency.

[0004] In order to solve this problem, a load for a certain period of the day is foreseen, and the number of operating boilers is limited at each time so that the number of boilers that are required exceeds the required number. Measures in Japan
No. 3 proposes this. However, according to the latter conventional method, it is necessary to set the required number of units for each hour in advance for each day, and this setting operation is performed separately for opening and closing control of the steam valve and for controlling the number of boilers in the steam generating equipment. The setting operation must be performed, and the setting operation is troublesome for the user. In addition, if the opening and closing of the steam valve is different from the preset one, it is necessary to redo the setting operation. Otherwise, there is a problem that it is not possible to quickly follow the load fluctuation.

[0005]

[0006]

According to the first aspect of the present invention, there are provided a plurality of steam-using facilities, a plurality of steam generating means, and a steam collecting section for collecting steam output from the steam generating means.
A plurality of steam supply paths that branch off from the steam collecting section and supply steam to the steam use equipment, a plurality of steam valves that control steam supply to each steam use equipment, and a number that controls the number of operating steam generation means Control means and valve control means for controlling opening and closing of the plurality of steam valves, wherein maximum flow rate information and minimum flow rate information of each of the steam supply paths are provided.
Setting means for setting the in-use steam information including: the in- use steam information set by the setting means; a storage means for storing the in-use steam information; and the in-use steam read from the storage means in accordance with the valve opening / closing information from the valve control means. A number control means for controlling the operation of the steam generating means by calculating the number of operating the plurality of steam generating means based on the steam information,

According to a second aspect of the present invention, there are provided a plurality of steam using facilities, a plurality of steam generating means, a steam collecting section for collecting steam outputted from the steam generating means, and a steam branching from the steam collecting section. A plurality of steam supply paths for supplying steam to the use facility, a plurality of steam valves for controlling the supply of steam to each steam use facility, a number control means for controlling the number of operating steam generation means, and the plurality of steam valves in those and a valve control means for controlling the opening and closing of a detecting means for detecting a variation in the actual steam load as a change in the vapor state, and setting means for pre-Symbol setting the use time steam information of each steam supply passage, Storage means for storing the in-use steam information set by the setting means; and operation of the plurality of steam generation means based on the in-use steam information obtained in accordance with the valve opening / closing information from the valve control means. And calculates the number initial value is characterized in that a number control means for controlling the number in accordance with the number of operating units initial value based on the detected value of said detecting means to control the operation of the steam generator,

According to a third aspect of the present invention, in the second aspect , the in-use steam information is steam flow rate information,

According to a fourth aspect of the present invention, in the second aspect , the steam generating means can select an output stop state, a low output state, and a high output state, and the steam flow rate information of each of the steam supply paths includes minimum flow rate information, The number control means calculates an initial value of the number of operating steam generating means to be in a low output state based on the sum of the minimum flow rate information of each steam supply path, and controls the operation of the steam generating means based on the initial value of the number of operating steam. Characterized in that

According to a fifth aspect of the present invention, in the third aspect , the steam generating means can select an output stop state, a low output state, and a high output state, and the steam flow rate information of each steam supply path includes maximum flow rate information, The number control means sets the maximum operation number of the steam generation means based on the sum of the maximum flow rate information of each steam supply path, and controls the operation of the steam generation means based on this number,

According to a sixth aspect of the present invention, in the third aspect , the valve control means outputs valve opening / closing information including opening / closing time information and valve opening / closing state information, and the number control means starts from the present time in accordance with the valve opening / closing information. The number of operating steam generating means based on the valve opening / closing state after a predetermined time is calculated, and an operation signal of the steam generating means is output from the calculation result and the current number of operating steam generating means to output valve opening / closing information after a predetermined time. Output before,

[0012] The invention of claim 7, Oite to claim 2, comprising a control excluded steam supply passage having a vapor valve not closing controlled by the valve control means, said valve control means for controlling excluded steam supply passage There is provided a setting means for setting corresponding in-use steam information and valve opening / closing information.

According to an eighth aspect of the present invention, in the second aspect , the in-use steam obtained by including the steam pressure in the in-use steam information and detecting means for detecting the steam pressure and obtaining the valve opening / closing information from the valve control means. A steam supply and use system that calculates an initial number of operating units based on pressure.

[0014]

[0015]

SUMMARY OF] According to the measures of claim 1, by setting in advance the use during steam information on the setting means, based on the valve opening and closing information from the valve control means for controlling the steam valve of the steam supply passage Maximum flow rate information read from storage means
The operating number of the steam generating means is calculated based on the in-use steam information including the minimum flow rate information, and the operation of the steam generating means is controlled by the number control means based on the calculated number, and the change in the used steam load is performed. The supply steam amount is controlled with good responsiveness. According to the second aspect of the present invention, the in-use steam information is set in advance by the setting means, so that the in-use steam information is read from the storage means based on the valve opening / closing information from the valve control means for controlling the steam valve of each steam supply path. The operating number initial value of the steam generating means is calculated based on the in-use steam information output, and the operation of the steam generating means is initially controlled by the number controlling means based on the calculated operating number initial value, and the actual load is calculated. The number of units is controlled based on the steam state such as the steam pressure, and the supply steam amount is controlled with high responsiveness to a change in the used steam load. According to the means of claim 3 , by setting the steam flow rate as the in-use steam information by the setting means in advance, it is stored based on the valve opening / closing information from the valve control means for controlling the steam valve of each steam supply path. The operating number initial value of the steam generating means is calculated based on the steam flow rate read out from the means, the operation of the steam generating means is initially controlled by the number controlling means based on the calculated operating number initial value, and the actual operation is performed. The number of units is controlled based on the steam state such as the steam pressure due to the load, and the supplied steam amount is controlled with high responsiveness to a change in the used steam load. According to the means of claim 4 , in addition to the function of claim 3 , by setting the minimum flow rate information of the steam flow rate as the in-use steam information by the setting means in advance, the steam valve of each steam supply path is controlled. Based on the minimum flow rate information read from the storage means based on the valve opening / closing information from the valve control means, an initial value of the number of operating steam generating means to be in a low output state is calculated. The operation of the steam generating means is initially controlled by the number control means, and the number is controlled based on the steam state such as the steam pressure due to the actual load fluctuation, so that the supplied steam amount is controlled with a high response to a change in the used steam load. You. According to the fifth aspect of the present invention, in addition to the operation of the third aspect of the present invention, the maximum flow rate information of the steam flow rate is previously set as the in-use steam information by the setting means, so that the steam valve of each steam supply path is provided. The maximum operating number of the steam generating means is calculated based on the maximum flow rate information read from the storage means based on the valve opening / closing information from the valve controlling means for controlling the valve controlling means, and the number controlling means is calculated based on the calculated maximum operating number. The number of operating steam generating means to be operated is limited, and the operation of more than necessary number of steam generating means is suppressed. According to the measure of claim 6 , claim
In addition to the action of the means 3 , the operation signal of the steam generation means is output from the number control means before the valve opening / closing signal is output from the valve control means, and the operation of the steam generation means from the input of the operation signal to the actual operation is performed. Even when there is a time delay, the steam supply control with good responsiveness is performed. According to the means of claim 7 , in addition to the effect of the means of claim 2, even when there is a steam supply path and a steam use facility provided with an uncontrolled steam valve that is not controlled by the valve control means,
The controllable system can be expanded as if it were controlling the non-controlled steam valve. Claim 8
According to the means, the steam pressure is previously set as the in-use steam information by the setting means, so that the steam pressure is read from the storage means based on the valve opening / closing information from the valve control means for controlling the steam valve of each steam supply path. The operating value of the number of operating steam generating means is calculated based on the output steam pressure, the operation of the steam generating means is initially controlled by the number controlling means based on the calculated operating number initial value, and the steam generated by the actual load is used. is installation control based on the vapor state such as a pressure, a good response supply amount of steam with respect to the change of use steam load that are controlled.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the present invention will be described with reference to the drawings. In FIG. 1, reference numeral 1 denotes a steam boiler as a steam generating means, which is provided with a combustion device 2 as a heating means for evaporating water. In the illustrated example, the boiler 1 uses a once-through steam boiler, and the combustion device 2 uses a gas burner, an oil-fired burner, etc., and the combustion device 2 is stopped, a low combustion (low fuel) state, and a high combustion (high fuel) state. The steam boiler 1 is configured to be able to take three output states: an output stop state, a low output state, and a high output state. The output characteristics of each boiler, that is, the low fuel evaporation amount and the high fuel evaporation amount are respectively RL
1, RH1 (unit is kg / h), and in this embodiment, R
H1 ≒ 2 × RL1, but is not limited to this.

The boiler in the stopped state has a delayed start characteristic that requires a predetermined time T seconds for pre-purge (scavenging) and ignition from the input of the low fuel start signal to the start of combustion. The type of boiler may be any type that generates steam, and a steam boiler other than a once-through type, such as a water tube type or a furnace tube type, may be used. Heating means can be used.

A plurality of the boilers 1, four in the illustrated example having the same output specifications are provided in parallel, and the steam output path 3 of each boiler 1 is provided.
Are connected to a steam header 4 as a common steam collecting part, and a steam supply path (steam line) 6
A, 6B, 6C are branched and connected, and a plurality of steam-using facilities 5
A, 5B, and 5C are configured to supply steam. Each of the steam supply paths is provided with steam valves 7A, 7B, 7C for controlling the flow of the respective steam, and furthermore, the ON / OFF control of the steam supply to the corresponding steam supply equipment. In addition, heating equipment, food machinery equipment that uses steam directly,
Includes factory equipment. These steam supply paths 6A, 6B,
6C use steam information includes a maximum steam flow rate, a minimum steam flow rate, a maximum steam pressure, and a minimum steam pressure, and each of the maximum steam flow rates is RHa, RHb, and RHC (unit is kg).
/ H), each minimum steam flow rate is RLa, RLb, RLc (unit: kg / h), and each maximum steam pressure is PHa, PHb, P
Hc (unit is kg / cm ² ), each minimum steam pressure is PL
a, PLb, and PLc (unit: kg / cm ² ), and the in-use steam information is previously obtained empirically or by calculation.

Reference numeral 8 denotes a pressure sensor as load fluctuation detecting means for detecting an actual steam load fluctuation as a steam state, specifically, a fluctuation in steam pressure inside the steam header 4, and 9 denotes a unit control comprising a microcomputer or the like. In the device, for example, the valve control device
In addition to the initial control based on the number of operating units calculated based on the valve opening / closing information from, the number of operating units is corrected and controlled based on the detection signal of the sensor 8. In this embodiment, the operation number control means controlling the number of steam boilers 2... To stop, low combustion, and high combustion. The position detected by the sensor 8 may be any position as long as it can detect the pressure of the steam collecting part.

M1 is a first storage means for storing steam information during use and valve opening / closing information, and M2 is a sum N of the maximum steam flow rates.
The second storage means M3 stores the sum N2 of the first steam flow rate and the minimum steam flow rate.
A third storage means for storing the maximum number of combustion units n1 'and the number of standby units with low fuel n2' after 2 seconds, and M4 stores the number of low fuel units nL and the high fuel nH for which the low fuel and high fuel activation instructions were actually issued. A fourth storage means M5 is a fifth storage means for storing the operation priorities, that is, the start and stop priorities of the four steam boilers, all of which are operated by a central processing unit (not shown) of the number control device 9. Reading and writing are controlled. These storage means are generally provided on one memory, but may be provided on a plurality of independent memories. S1 is first setting means for setting the driving priority and the like.

Numeral 10 denotes a valve control device comprising a microcomputer or the like, which controls the opening and closing of the steam valves 7A, 7B, 7C in accordance with a previously stored processing procedure and transmits valve opening / closing information to the number control device 9 through a signal transmission line 11. . S2 is a maximum steam flow rate RHa, a minimum steam flow rate RLa,... Of each of the steam supply paths 6A, 6B, 6C.
Maximum steam pressure PHa ..., minimum steam pressure PLa ...
The second setting means for manually setting the in-use steam information such as the value of the valve and the control information such as the valve opening / closing information. M6 is a sixth storage means for storing the in-use steam information set by the second setting means S2. The stored contents are stored, for example, in a table format as shown in FIG. 3 so that in-use steam information such as maximum flow rate and minimum flow rate information of the corresponding steam supply path can be read out based on the valve opening / closing information. Although the in-use steam information is configured to be transmitted to the number control device 9 after the setting is completed, the valve control device 10 may transmit the data when the number control device 9 needs the data. good.

M7 is a seventh storage means for storing the valve opening / closing information set by the second setting means S2. The set valve opening / closing information is ON (open) or OFF (closed) of each of the steam valves 7A, 7B, 7C. The opening / closing state information and the opening / closing time information are stored in, for example, a table format as shown in FIG. The valve opening / closing information is transmitted to the number control device 9 after the setting is completed, and the opening / closing information is transmitted to each steam valve at the set time, whereby each steam valve is opened / closed. If there is no time setting, the valve opening / closing information is immediately transmitted to each steam valve.

Next, the operation of the above embodiment will be described with reference to FIG. First, at the time of system startup, the valve control device 10
The in-use steam information is input using the second setting means S2, and is stored in the sixth storage means M6, and the valve opening / closing information is input when necessary, and is stored in the seventh storage means M7. Then, after the input in-use steam information and the valve opening / closing information are input, the sixth storage means M6,
The data is read from the seventh storage unit M7, transmitted to the number control device 9, and stored in the first storage unit M1 as described later. The data transmission method of the in-use steam information and the valve opening / closing information may be transmitted separately, or only the data necessary for controlling the number of units may be associated with the valve opening / closing information and transmitted. .

First, a case will be described in which there is only one valve opening / closing information, the information is only the valve opening / closing state information, and does not accompany the opening / closing time information, and it is necessary to start the boiler immediately. Step S1 (hereinafter SN is step SN
), It is determined whether the valve opening / closing information has been received. If YES is determined, the valve opening / closing information received in S2 is stored in the first storage unit M1. Next, in S3, it is determined whether there is a valve opening / closing signal within the time t <T seconds from the current time by referring to the valve opening / closing information stored in the first storage unit M1. Note that T seconds is substantially equal to or slightly longer than the time required for each boiler 1 to transition from the stopped state to the low fuel state as described above.
In this case, the answer is YES, the process proceeds to S4, and a valve opening / closing information processing flag indicating whether or not the processing for the valve opening / closing signal has been completed is checked. This flag is shown in FIG.
When there are four types of valve opening / closing information with respect to the time axis as described above, a flag is set for each piece of opening / closing information, and all steam valves are reset when the system is turned off. In this case, since it is NO, the process proceeds to S5.

In S5, the maximum steam flow rate corresponding to each valve that is turned ON is obtained, the total sum N1 of the maximum steam flow rates is calculated, and the minimum steam flow rate corresponding to each valve that is turned ON in S6 is calculated. The sum N2 is calculated and stored in the second storage means M2. In S7, the initial value of the maximum number of combustion units (the limited number of steam boilers for controlling the combustion) n1 based on the total N1
In S8, based on the total N2, the low fuel standby number initial value n2
(≦ n1) are calculated and stored in the third storage unit M3. The calculation of n1 is performed by dividing the sum N1 + α (α is a positive constant for providing a margin) by the evaporation amount of the steam boiler 1 during high combustion, and setting the rounded-up number to n1. Although not shown, a valve opening / closing information processing flag is set after S8.

Next, in S9, n1, n obtained in this manner are obtained.
The control amount is obtained according to 2. That is, when the pressure is equal to or lower than the control target pressure, a low-combustion start signal is output to the n2 steam boilers 1 in descending order of priority, and nL (low-fuel start instruction number) =
Increase the number of low combustion units until n2. Thereafter, nL and nH (high fuel indication numbers) are added in a predetermined order so as to reach the target pressure. Here, the increase in the number of nL and nH is limited to n1 to prevent unnecessary starting and stopping of the boiler due to a delay in the response of the boiler. The start instruction number nL by this processing,
nH is stored in the fourth storage means M4.

When the process of S9 is completed, the process returns to S1 to determine whether new valve opening / closing information has been received. In this case, if NO, the process proceeds to S3, and NO is also determined in S3.
If the determination here is also NO, the process proceeds to S9, and the number of operating boilers is controlled based on the initial values n1 and n2 such that the detected steam pressure becomes the predetermined target steam pressure.

Next, the setting device S2 of the valve control device 10
A case where a plurality of sets of valve opening / closing state information and valve opening / closing time information as shown in FIG. 4 are set as the valve opening / closing information will be described. In this case, referring to FIG. 2, the processing after S3 will be described. First valve opening / closing information stored in the first storage means M1 is stored at time t <T
If it is within seconds, the processing of S3 to S9 is executed as described above, but if it is not within t <T seconds, the processing from S3 to S9 is performed.
Then, it is determined whether or not there is valve opening / closing information after time t = T seconds. In this case, NO is determined,
The process proceeds to S9, controls the number based on the detected pressure, and returns to S1. If YES is determined in S11, the process proceeds to S12, and it is determined whether a valve opening / closing information flag is set for the first valve opening / closing state signal. N in this case
It is O, the process shifts to S5, and the processes of S5 to S9 described above are executed.

At T seconds before the next valve opening / closing signal,
The determination in S11 is YES, the determination in S12 is YES, and the process proceeds to S13. In T13, after T seconds, that is, when outputting the valve opening / closing information to the steam valve, the maximum number of combustion units n1 'and the number of low combustion standby units n based on this valve opening / closing information
2 ′ is calculated and stored in the third storage unit M3. Then
The value n1 'obtained in S14 is compared with the current maximum number n1 of combustion, and the result of the comparison is compared with the number nL of currently low combustion (currently low fuel number) n and the number of currently high combustion number (currently high fuel number) in S15. ) Compute new n1 and n2 from nH. An example of a specific method of the calculation is as follows.

That is, when n1 = n1 ', nothing is performed. n
When 1> n1 ′, that is, when load reduction is predicted, n1>nL> n
If 1 ', the new n1 = nL, and if n1>n1'> nL, the new n1 = n1 '. This means that when the load is expected to decrease, the number of low-fuel standby units that are newly set to the low combustion state to be in the standby state is not increased, in other words, the prohibition processing of the new startup is performed.

When n1 <n1 ', that is, when the load increase is predicted, if n1'<nL + nH, the new nL = n1 'and n1'
-Start combustion for nL, and if n1'≥nL + nH, start nH, that is, new nL = nL + nH
And When the combustion start is completed, a new nH = (nL + n
H-new nL), the high combustion is continued for the number, and the rest is shifted to low combustion. In this way, in response to the load increase, the responsiveness is improved by reducing the number of high-fuel units as much as possible and increasing the number of low-fuel units. In other cases, if nL <n2, a new nL = n2 is set and combustion standby for the expected output shortage is performed. By such processing at the time of the expected load increase, it is possible to cope with the load increase by shifting from low fuel to high fuel when the load increases after T seconds.

Next, another embodiment of the present invention will be described with reference to FIGS. This embodiment includes an uncontrolled steam supply passage 6D having a manually opened / closed steam valve 7D that is not controlled to be opened / closed by a valve control device 10. The valve control device 10 uses a setting means S2 to set the in-use steam information and the valve regarding the steam supply passage 6D. An additional feature is that data relating to opening / closing information can be set. More specifically, as shown in FIG. 6, the minimum steam flow rate RLd, the maximum steam flow rate RHd, the maximum pressure PHd, and the minimum pressure PLd regarding the steam supply path 6D together with the in-use steam information of the other steam supply paths.
And valve opening / closing information on the steam valve 7D as shown in FIG. 7 from the setting means S2. As a result, the steam valve 7D is connected to the valve control device 11
Although it is not controlled, the valve opening / closing information and the in-use steam information can be registered, so that load information for controlling the number of boilers, that is, controlling the steam output amount can be provided to the number control device 9. This has the effect of expanding the range of systems to which the present invention can be applied.

Further, the present invention is not limited to the above-described embodiment, and the valve control device 10 and the number control device 9 of FIG. 1 may be mechanically and electrically integrated as shown in FIG. Good. In such a case, it is possible to reduce the size of the control device, reduce the amount of storage means, and the like.

The embodiment of the present invention also includes a configuration in which the control target pressure of the steam header 4 is changed in conjunction with the opening and closing of the steam valve by using the pressure information as the steam information during use. It is. Specifically, for example, when only the steam valve 7A is ON in the first time zone and only the steam valve 7B is ON in the next second time zone, the first time zone and the second
Is performed to make the control target pressure different in the time zone of. By such control, steam supply control more suitable for the used steam load can be performed.

Further, in the embodiment shown in FIGS. 1 and 2, the maximum number of combustion units n1 and the low-fuel standby unit n2 are obtained to perform the unit control. Included as embodiments of the invention. Also, S9 of FIG.
In the above, after the unit control by the maximum combustion number n1 and the low fuel standby number n2, the operation number initial value is corrected based on the steam pressure due to the actual load, but the steam temperature is detected instead of the steam pressure. The configuration is also included as an embodiment of the present invention.

Further, in the above embodiment, the steam valve is turned on.
Although an OFF type two-position type is used, the present invention is also applicable to a system using a steam valve whose opening / closing degree can be controlled in multiple stages or proportionally. Examples of the present invention also include a system using a plurality of steam boilers having different evaporation amounts, and a system using a steam boiler capable of proportionally controlling the evaporation amount. Further, in the above embodiment, the steam valve is provided in the steam supply path, but the present invention is also applicable to a system provided in a steam-using facility.

Further, in the above embodiment, the steam flow rate as the in-use steam information for each steam supply path is manually set by the setting means S2, but the in-use steam information may be automatically set. As an example of the configuration of this automatic setting means, a unit control test operation using only the steam pressure detection sensor 8 is performed for a predetermined period of time, for example, one day, not based on valve opening / closing information in advance. In addition to storing the opening and closing of the valve, the sum of the steam flow rates at each sampling time is defined as a steam generation amount obtained from the number of steam boilers operated, and the sum of the steam flow rates is stored in a steam supply path having a valve in an open state at a predetermined rate. And calculate and store it as the steam flow rate of each steam supply path at the time of sampling. The maximum value of the steam flow rate for each steam supply path thus determined is stored as the maximum steam flow rate, and the minimum value is stored as the minimum steam flow rate.

In FIG. 2, the delay times in S3 and S11 are mainly required for pre-purge, but each steam boiler 1 is provided with a steam pressure detector (not shown).
The delay time T may be obtained by adding the time required to reach the predetermined pressure from the pressure detected by the steam pressure detector of the boiler to be started to the time required for the pre-purge.

[0039]

As described above, according to the present invention, the number of operating units is calculated based on the valve opening / closing information from the valve control means for controlling the steam valve of each steam supply path, and the number of steam generation means is controlled by the number control means. Although the operation is controlled, the change in the used steam load is directly detected by the valve opening / closing signal, so that the supplied steam amount is controlled with good responsiveness. In addition, there is no need to set extra steam information during use for controlling the number of units, so that a user-friendly system can be provided.

[Brief description of the drawings]

FIG. 1 is a diagram showing a system configuration according to an embodiment of the present invention.

FIG. 2 is a diagram illustrating an example of a processing procedure performed by the number control device according to the embodiment;

FIG. 3 is a diagram showing an example of contents stored in a storage unit of the embodiment.

FIG. 4 is an example of storage contents of another storage unit of the embodiment.
A is a view to view.

FIG. 5 is a diagram showing a system configuration of another embodiment of the present invention.

[6] Figure of an example of the contents of the first storage means of the embodiment
Shows a to view.

FIG. 7 is an example of storage contents of another storage unit of the embodiment.
A is a view to view.

FIG. 8 is a diagram showing a system configuration of another embodiment of the present invention.

Claims (8)

(57) [Claims] 1. A plurality of steam using equipment, a plurality of steam generating means, a steam collecting part for collecting steam output from the steam generating means, and a branch from the steam collecting part to supply steam to the steam using equipment. A plurality of steam supply paths for supplying, a plurality of steam valves for controlling the steam supply to each steam use facility,
In a system comprising a number control means for controlling the number of operating steam generating means and a valve control means for controlling opening and closing of the plurality of steam valves, the maximum flow rate information of each steam supply passage is provided.
To set the in-use steam information including the
Setting means and the in-use steam information set by the setting means.
Storage means for storing the information and a buffer from the valve control means.
Read out from the storage means in accordance with
Number of operating steam generators based on in-use steam information
Number control means for controlling the operation of the steam generation means by calculating
And a steam supply and use system. 2. A plurality of steam-using facilities, a plurality of steam-generating means, a steam collecting part for collecting steam outputted from the steam-generating means, and a branch from the steam collecting part for supplying steam to the steam-using equipment. A plurality of steam supply paths for supplying, a plurality of steam valves for controlling the steam supply to each steam use facility,
A number control means for controlling the number of operating the steam generation unit, in which and a valve control means for controlling the opening and closing of the plurality of steam valves, vaporous variations in actual steam load
Detecting means for detecting a change in state, and each of the steam supply paths
Setting means for setting steam information at the time of use, and this setting means
Storage means for storing the in-use steam information set by the user
In accordance with valve opening / closing information from the valve control means.
The plurality of steam generating means based on the in-use steam information.
Calculate the initial number of operating units to control the operation of the steam generator.
And based on the detection value of the detection means,
A steam supply and use system, comprising: a number control means for controlling the number according to a period value . 3. The method according to claim 2, wherein the in-use steam information is
A steam supply and use system characterized by air flow rate information . 4. The steam generator according to claim 3, wherein
A stop state, a low output state, and a high output state can be selected.
The steam flow rate information of the steam supply path includes minimum flow rate information,
The number control means is based on the sum of the minimum flow rate information of each steam supply path.
Initial value of the number of operating steam generating means to be kept in a low output state
Is calculated, and the steam generating means
A steam supply and use system characterized by controlling operation . 5. The apparatus according to claim 3, wherein the steam generating means outputs
A stop state, a low output state, and a high output state can be selected.
The steam flow rate information of the steam supply path includes maximum flow rate information,
The number control means is based on the sum of the maximum flow rate information of each steam supply path.
Set the maximum number of operating steam generators in
Controlling the operation of the steam generating means . 6. The valve control means according to claim 3, wherein
Is a valve consisting of open / close time information and valve open / close state information
Open / close information is output, and the number control means
According to the information, based on the valve opening / closing state
The number of operating steam generating means is calculated, and the calculation result and
Based on the number of steam generators currently operating,
Before the valve opening / closing information is output after a predetermined time.
Steam supply used system, characterized in that the force. 7. The valve control means according to claim 2, wherein
Out of control with a steam valve that does not open and close
A steam supply path, wherein the valve control means
In-use steam information and valve opening / closing information corresponding to the air supply path
A steam supply and use system, comprising setting means for setting the temperature. 8. The method according to claim 2, wherein the in-use steam information is
The detection means detects the steam pressure while including the gas pressure,
The use obtained according to the valve opening / closing information from the valve control means.
A steam supply and use system that calculates an initial number of operating units based on steam pressure during use.