JPH07233902A - Oil temperature-controlling method in combined multi-boilers system - Google Patents

Abstract

PURPOSE:To prevent a useless consumption of energy for a boiler in a combustion stoppage, by executing a stoppage of an oil pump of the boiler, which receives no low oil temperature controlling signal, through a lower setting of an oil temperature during a combustion stoppage of the boiler which received the low oil temperature controlling signal than a set oil temperature value during combustion. CONSTITUTION:A low oil temperature controlling signal is sent to, for example, No.2 and No.3 boilers from a boilers number regulating device 2, according to a priority rank order which is preliminarily given to No.2-No.4 boilers under a combustion stoppage state owing to a load fluctuation, in combined multi-boilers. With respect to No.2 and No.3 boilers that have received the low oil temperature controlling signal, oil temperature values during a combuation stoppage are set lower than an oil temperature value under combustion, and an oil pump 9 is operated. And, an oil pump 9 of the No.4 boiler receiving no low oil temperature signal and being under combustion stoppage state, is stopped. Besides, the oil pump 9 when oil pumps of No.2 and No.3 boilers have received a low oil temperature controlling signal and is under combustion stoppage state is controlled to be stopped during a predetermined timer, or operated intermittently.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling oil temperature of a boiler in a multi-can installed boiler while combustion is stopped.

[0002]

2. Description of the Related Art As is well known, in a multi-can installation system for boilers, there are cases where all boilers installed with multiple cans operate due to load fluctuations, and cases where some boilers can be operated to handle the load. In the latter case, only some boilers with multiple cans are in operation, and other boilers have burner burners stopped, but an oil heater and oil pump are used to maintain the set oil temperature of the fuel oil supplied to the burners. Is operating so that it can respond immediately to changes in load. However, if the load side is less demanded and the combustion stop time is long, the fuel oil is held at the set temperature, and wasteful energy is consumed.

[0003]

SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a method for controlling the oil temperature of a boiler when combustion is stopped.

[0004]

That is, according to claim 1 of the present invention, in a multi-can installation system for a boiler in which the priority is set in advance, for the boiler whose combustion is stopped among the multi-can installation boilers, A low oil temperature control signal is transmitted from a unit control device for multiple boilers to a predetermined number of boilers according to the priority, and the oil temperature value during combustion stop of the boiler that receives this low oil temperature control signal is being burned. Is set to a value lower than the set oil temperature value, and the oil pump of the boiler in which combustion is stopped that does not receive the low oil temperature control signal is stopped. In a multi-can installation system for a boiler that has been set, for a boiler that has stopped combustion among the multi-can installed boilers, a low oil temperature is applied to a predetermined number of boilers according to the priority from the unit control device for the multi-can installed boilers. Control signal, and the oil pump of the boiler which has received the low oil temperature control signal stops the combustion of the oil pump for a predetermined time or intermittently, and does not receive the low oil temperature control signal of the boiler. According to the invention of claim 3, in the boiler multi-can installation system in which the priorities are preset, the priority is given to the boiler whose combustion is stopped among the multi-can installed boilers. A predetermined number of boilers perform the same oil temperature control as during combustion, and the number control device 2 of the multi-can installed boiler sends a low oil temperature control signal to the predetermined number of boilers of the next priority, and this low oil temperature control is performed. The oil temperature value during the combustion stop of the boiler receiving the signal is set to be lower than the set oil temperature value during combustion, and the invention of claim 4
In a boiler multi-can installation system with priorities set in advance, for a boiler that has stopped combustion in a multi-can installation boiler, a predetermined number of boilers perform the same oil temperature control as during combustion according to the priority. , A low oil temperature control signal is transmitted from a unit control device of the multi-can installed boiler to a predetermined number of boilers of the next priority, and the oil pump of the boiler receiving the low oil temperature control signal is stopped or intermittently operated for a predetermined time. According to the invention of claim 5, in a boiler multi-can installation system in which priorities are set in advance, a predetermined number of boilers of a multi-can installation boiler are set in accordance with the priorities with respect to boilers in which combustion is stopped. The boiler performs the same oil temperature control as during combustion, and sends a low oil temperature control signal to the predetermined number of boilers of the next priority from the unit control device of the multi-can installed boiler, and outputs this low oil temperature control signal. The oil temperature value during the combustion stop of the single boiler is set to be lower than the set oil temperature value during the combustion, and the oil pump of the boiler during the combustion stop that does not receive the low oil temperature control signal is stopped. According to the invention of claim 6, in a boiler multi-can installation system in which priorities are set in advance, a predetermined number of boilers are burned in accordance with the priorities with respect to the boilers in which combustion is stopped among the multi-can installed boilers. Perform the same oil temperature control as in the middle, send a low oil temperature control signal from the unit control device of the multi-can installed boiler to a predetermined number of boilers of the next priority, and the oil of the boiler that receives this low oil temperature control signal It is characterized in that the pump is stopped or operated intermittently for a predetermined time, and the oil pump of the boiler which is not receiving the low oil temperature control signal is stopped.

[0005]

According to the present invention, a low oil temperature control signal is sent from the multi-can installed boiler number control device to the boiler in which combustion is stopped among the boilers installed in multiple cans whose priorities are preset. The fuel oil set temperature of the boiler that receives the low oil temperature control signal is set to a low value while combustion is stopped, and the oil pump of the boiler is stopped while other combustion is stopped to prevent waste of energy.

[0006]

Embodiments of the present invention will be described in detail below with reference to the drawings. FIG. 1 is an explanatory view showing the arrangement of a multi-can installed boiler according to the present invention, and FIG. 2 is an explanatory view showing a part of the configuration of the multi-can installed boiler of FIG. In the figure, 1 is a boiler,
A plurality of units (No. 1 to No. 4) are installed, and each boiler has a steam pipe 13 connected to a common steam header 14, and a pressure sensor 15 of this steam header 14 is connected.
Based on the detection signal of 1., the unit number control device 2 controls combustion and stop of each boiler. The unit number control device 2 and the burner controller 3 of each boiler are connected via a line 4. Reference numeral 5 in the drawing denotes a line for transmitting a detection signal from the pressure sensor 15 to the unit number control apparatus 2.

The burner controller 3 of the boiler 1 is shown in FIGS.
As shown in FIG. 2, an oil burner 6 provided in the boiler 1, an oil temperature controller 8 attached to an oil heater 7, and an oil pump 9 are connected via a line 10. An oil supply line 11 is connected to the oil burner 6, and an oil heater 7 and an oil pump 9 are provided on the way. Reference numeral 12 in the figure is a return line from the oil burner 6 to the oil supply line 11 on the inlet side of the oil pump 9. The oil supply line 11 and the return line 12 connect the oil pump 9, the oil heater 7, and the oil burner 6 to the oil pump 9. It forms an oil circulation path. The oil temperature controller 8 is attached to the oil heater 7, and detects the oil temperature in the oil heater 7 and turns the oil heater on and off so that the oil temperature is within a set range. An OFF signal is transmitted to the burner controller 3. The burner controller 3 receives the OF from the oil temperature controller 8.
After receiving the F signal (the oil temperature in the oil heater reaches the set temperature) and operating the oil pump 9, the oil burner 6 is operated in response to the signal from the unit number control device 2. The boiler No. 1 in FIG. Numbers 1 to 4 also serve as numbers indicating the starting priority order that is preset according to the load amount.

Next, the oil temperature control method of the present invention will be described. Among the multi-can installed boilers, for example, to the boilers (No. 2 to No. 4) whose combustion is stopped due to the change of load, according to the priority order from the unit number control device 2, for example, No.
2, No. The low oil temperature control signal is transmitted to the boiler of No. 3. Boiler No. which received this low oil temperature control signal. 2, No. In No. 3, the oil temperature value during combustion stop is set lower than the oil temperature value during combustion (two-stage control), and the oil pump 9 operates.
Then, the boiler No. which has not received the low oil temperature control signal and has stopped combustion. The oil pump 9 of 4 is stopped. Further, according to this method, the boiler N receiving the low oil temperature control signal
o. 2, No. The oil pump 9 during the combustion stop of No. 3 is controlled so as to be stopped or operated intermittently for a predetermined time, and the boiler No. It is also possible to stop the oil pump 9 of No. 4. The boiler No. The oil heater 7 is turned on or off while the oil pump 9 of No. 4 is stopped.
It may be set to either. In addition, the boiler No. 1 is burning.

An oil temperature control method, which is an alternative to the oil temperature control method for the boiler during the combustion stop, will be described. That is, this oil temperature control method is applied to, for example, the boiler No. No. 2 performs the same oil temperature control as during combustion, and the boiler No. 3, No. The low oil temperature control signal is transmitted to 4 and is set lower than the oil temperature value during combustion. In addition, the boiler No. 3, No. It is also possible to send the low oil temperature control signal to No. 4 and stop the oil pump 9 for a predetermined time or intermittently operate it while combustion is stopped. Further, according to this method, the boiler No. Three
A low oil temperature control signal is sent only to the boiler No. It is also possible to adopt an oil temperature control method in which the oil pump 9 of No. 4 is stopped in multiple stages.

According to the above oil temperature control method, when a combustion instruction is issued from the unit control device 2 to a predetermined boiler whose combustion is stopped according to the priority, the oil burner 6
Since the oil temperature is set to an oil temperature close to the minimum oil temperature at which combustion can be ignited while the combustion is stopped, it is ignited immediately, and after igniting the oil burner 6, the oil temperature controller 8 is set to a preset oil temperature with good combustion efficiency Since the oil heater 7 is used for heating, it is possible to prevent energy from being wasted while the combustion is stopped.

[0011]

As described above, according to the present invention, among the multiple-can installed boilers whose priorities are preset, the boilers in which combustion is stopped are given priority by the multi-can installed boiler unit control device. Send a low oil temperature control signal to a predetermined number of boilers according to the order, and set the oil temperature value during combustion stop of the boiler receiving this low oil temperature control signal to a value lower than the oil temperature value during combustion, Since the oil pumps of the other boilers that have stopped combustion without receiving the low oil temperature control signal are stopped, it is possible to prevent waste of energy during the stop of combustion.

[Brief description of drawings]

FIG. 1 is an explanatory view showing an arrangement of a multi-can installed boiler embodying the present invention.

FIG. 2 is an explanatory diagram showing a part of the configuration of the multi-can installed boiler shown in FIG.

[Explanation of symbols]

 1 Boiler 2 Unit control device 9 Oil pump

Claims (6)

[Claims] 1. In a multi-can installation system for boilers having priorities set in advance, for a boiler whose combustion is stopped among the multi-can installed boilers, the unit control device 2 of the multi-can installed boiler sets the priority to the above-mentioned priority. Therefore, a low oil temperature control signal is transmitted to a predetermined number of boilers, and the oil temperature value during the combustion stop of the boiler which receives this low oil temperature control signal is set to be lower than the set oil temperature value during combustion, An oil temperature control method for a multi-can installed boiler, characterized in that the oil pump 9 of the boiler that has stopped combustion without receiving the low oil temperature control signal is stopped. 2. In a multi-can installation system for boilers having priorities set in advance, for a boiler whose combustion is stopped among the multi-can installed boilers, the unit control device 2 of the multi-can installed boiler sets the priority to the above-mentioned priority. Accordingly, a low oil temperature control signal is transmitted to a predetermined number of boilers, and the oil pump 9 that has received the low oil temperature control signal is stopped or intermittently operated for a predetermined time and the low oil temperature control signal is transmitted. An oil temperature control method for a multi-can installed boiler, characterized in that the oil pump 9 of the boiler which is not receiving combustion is stopped. 3. In a multi-can installation system for boilers having priorities set in advance, for a boiler in which combustion is stopped among the boilers installed in multiple cans, a predetermined number of boilers are the same as those during combustion according to the priority. The oil temperature control is performed, a low oil temperature control signal is transmitted from the unit control device 2 of the multi-can installed boiler to a predetermined number of boilers of the next priority, and the combustion of the boiler receiving the low oil temperature control signal is stopped. An oil temperature control method for a multi-can installed boiler, wherein the oil temperature value is set lower than the set oil temperature value during combustion. 4. In a boiler multi-can installation system in which priorities are preset, for a boiler in which combustion is stopped among the multiple-can installed boilers, a predetermined number of boilers according to the priority are the same as those during combustion. The oil temperature control is performed, a low oil temperature control signal is transmitted from the unit control device 2 of the multi-can installed boiler to a predetermined number of boilers of the next priority, and the oil pump 9 of the boiler which receives the low oil temperature control signal is transmitted. An oil temperature control method for a multi-can installed boiler, which comprises stopping or intermittently operating for a predetermined time. 5. In a multi-can installation system for boilers having priorities set in advance, for a boiler in which combustion is stopped among the boilers installed in multiple cans, a predetermined number of boilers according to the priority are the same as those during combustion. The oil temperature control is performed, a low oil temperature control signal is transmitted from the unit control device 2 of the multi-can installed boiler to a predetermined number of boilers of the next priority, and the combustion of the boiler receiving the low oil temperature control signal is stopped. A multi-can installation boiler characterized in that the oil temperature value is set to be lower than the set oil temperature value during combustion, and the oil pump 9 of the boiler during combustion stop that does not receive the low oil temperature control signal is stopped. Oil temperature control method. 6. In a multi-can installation system for boilers having priorities set in advance, for a boiler in which combustion is stopped among the multiple-can installation boilers, a predetermined number of boilers according to the priority are the same as those during combustion. The oil temperature control is performed, a low oil temperature control signal is transmitted from the unit control device 2 of the multi-can installed boiler to a predetermined number of boilers of the next priority, and the oil pump 9 of the boiler which receives the low oil temperature control signal is transmitted. An oil temperature control method for a multi-can installed boiler, which comprises stopping or intermittently operating for a predetermined period of time and stopping the oil pump 9 of the boiler which is not in combustion and does not receive the low oil temperature control signal.