JP2012041851A - Heating value adjusting device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heating value adjusting device that has a simple structure and appropriately adjusts the heating value of mixed gas while suppressing the facility cost.SOLUTION: This heating value adjusting device includes a flow rate adjusting means 13 for adjusting the flow rate of fuel gas G2 for heat increase flowing through a fuel gas supply system 11 for heat increase, a first mass flow rate measuring means 14 for measuring a first mass flow rate, which is the first mass flow rate of mixed gas G3 having a target heating value demanded for the mixed gas G3 after heat increase in a mixed gas supply system 12, and a first controlling means 15 for generating a first control command for adjusting the heating value of the mixed gas G3 to the target heating value based on the first mass flow rate measured by the first mass flow rate measuring means 14. The flow rate adjusting means 13 receives the first control command generated in the first controlling means 15, and adjusts the flow rate of the fuel gas G2 for heat increase flowing through the fuel gas supply system 11 for heat increase.

Description

  The present invention provides a main fuel gas supply system for flowing main fuel gas in a predetermined pressure state, and an increase in which a heat increasing fuel gas mixed for increasing the heat of the main fuel gas is flowed in a predetermined pressure state. A fuel gas supply system for heat and a gas mixture supply system through which a mixed gas obtained by mixing the main fuel gas with the fuel gas for increasing heat flows, and the mixed gas adjusted to a predetermined target heat amount is consumed as fuel gas It is related with the calorie | heat amount adjustment apparatus guide | induced to a part.

Conventionally, in a calorific value adjusting device that adjusts a mixed gas obtained by mixing a fuel gas for increasing heat to a main fuel gas to a desired target calorific value and supplies it to a fuel gas consuming unit on the downstream side, the main fuel gas is in a predetermined pressure state. A main fuel gas supply system through which the heat increase fuel gas flows in a predetermined pressure state, and a mixed gas in which the main fuel gas is mixed with the heat increase fuel gas. A mixed gas supply system that flows, a calorimeter that measures the amount of heat of the mixed gas flowing through the mixed gas supply system, and a flow rate adjustment that adjusts the flow rate of the fuel gas for increasing heat in the fuel gas supplying system for increasing heat And a control means for controlling the flow rate adjusting means based on the measurement result of the calorimeter.
In the calorific value adjusting device, the heat quantity of the mixed gas is directly measured by a calorimeter, and the control means controls the flow rate adjusting means so that the calorific value becomes a desired target calorific value, and the heat increase mixed with the main fuel gas. The fuel gas flow rate is adjusted (see Patent Document 1).

Reality 6-22429

  However, a gas chromatograph (high-accuracy component analyzer) commonly known as a calorimeter has a complicated structure and is relatively expensive. For this reason, in the calorie | heat amount adjustment apparatus using the said calorimeter, there existed a problem that a structure became complicated and installation cost started.

  The present invention has been made in view of the above-described problems, and an object of the present invention is to provide a calorific value adjusting device capable of appropriately adjusting the calorific value of a mixed gas while having a simple structure and suppressing the manufacturing cost. It is in.

In order to achieve the above object, a calorific value adjusting device according to the present invention comprises a main fuel gas supply system that allows main fuel gas to flow in a predetermined pressure state, and a heat-increasing fuel gas mixed with the main fuel gas. A fuel gas supply system for increasing heat that flows in a pressure state, and a gas supply system that supplies a mixed gas in which the fuel gas for increasing heat is mixed with the main fuel gas. A calorific value adjusting device that adjusts the mixed gas guided to the downstream side to a target calorific value, the first characteristic configuration is:
A flow rate adjusting means for adjusting a flow rate of the heat increasing fuel gas flowing through the heat increasing fuel gas supply system;
A first mass flow rate measuring means for measuring a first mass flow rate that is a mass flow rate of the mixed gas having a target heat amount required for the mixed gas after the heat increase is provided in the mixed gas supply system,
Based on the first mass flow rate measured by the first mass flow rate measurement means, comprising first control means for generating a first control command for adjusting the heat quantity of the mixed gas to the target heat quantity,
The flow rate adjusting means receives the first control command generated by the first control means and adjusts the flow rate of the heat increasing fuel gas flowing through the heat increasing fuel gas supply system. .

The present invention pays attention to the fact that the mass flow rate measured by the mass flow rate measuring means (specifically, the mass flow meter for measuring the flow rate of the gas having a predetermined mass set in the meter) corresponds to the heat amount of the fuel gas. However, the present inventors have found that the amount of the heat increasing fuel gas mixed with the main fuel gas can be adjusted according to the increase or decrease of the mass flow rate measured by the mass flow rate measuring means.
In the present application, the mass flow rate measuring means (specifically, the mass flow meter) is a measuring device capable of setting the above-mentioned “predetermined mass to be measured by a meter (mass per predetermined volume)”. The output mass flow rate is output in the form of a volume flow rate, for example, “liter / min”. Accordingly, it is possible to know the mass of the fluid flowing through the measurement site by “predetermined mass to be set” × “output (liter / min)”.
That is, in the configuration including the first mass flow measurement means, the first control means, and the flow rate adjustment means, the first mass flow measurement means has a predetermined target heat amount of the mixed gas at the installation position. The mass gas flow rate (first mass flow rate) is measured. And when the calorie | heat amount of the mixed gas which flows through the said installation position is insufficient with respect to the said target calorie | heat amount, a flow volume is measured as a value on the low flow rate side.
When the flow rate on the low flow rate side is measured in this way, the amount of heat of the mixed gas is insufficient (the mixed gas of a predetermined mass is not flowing). Therefore, in the first control means, the main fuel A first control command for increasing the heat-increasing fuel gas mixed with the gas from the current state is generated, and the flow rate adjusting means operates according to the first control command. As a result, by simply installing a general mass flow meter in the mixed gas supply system, it is possible to easily and inexpensively adjust the amount of heat in increasing the temperature of the mixed gas.

Here, regarding the generation of the first control command in the first control means, the control characteristics when the flow rate adjustment of the fuel gas for heat increase by the flow rate adjustment means is performed in advance according to the measurement value of the first mass flow rate measurement means. For example, it may be configured to perform proportional control, first-order lag control, integral control, and the like.
As described above, by using the first mass flow rate measuring means and the first control means unique to the present application, it is possible to realize a heat quantity adjusting device capable of appropriately adjusting the heat quantity while having a relatively simple structure and suppressing the manufacturing cost. .

[Second feature configuration]
A further characteristic configuration of the heat quantity adjusting device of the present invention is as follows.
A main fuel gas supply system for flowing main fuel gas in a predetermined pressure state; and a heat increase fuel gas supply system for flowing heat increase fuel gas mixed in the main fuel gas in a predetermined pressure state; A mixed gas supply system through which a mixed gas in which the main fuel gas is mixed with the fuel gas for increasing heat flows, and a heat quantity for adjusting the mixed gas led to the downstream side of the mixed gas supply system to a target heat quantity An adjustment device,
A flow rate adjusting means for adjusting a flow rate of the heat increasing fuel gas flowing through the heat increasing fuel gas supply system;
A second mass flow rate measuring means for measuring a second mass flow rate which is a mass flow rate of the main fuel gas having a main fuel gas calorific value required for the main fuel gas flowing through the main fuel gas supply system is provided in the main fuel gas supply system. And prepare for
Based on the second mass flow rate measured by the second mass flow rate measurement means, comprising second control means for generating a second control command for adjusting the heat quantity of the mixed gas to the target heat quantity,
The flow rate adjusting means adjusts the flow rate of the heat increasing fuel gas flowing through the heat increasing fuel gas supply system in response to the second control command generated by the second control means. .

This invention also pays attention to the fact that the mass flow rate measured by the mass flow rate measuring means (specifically, the mass flow meter for measuring the flow rate of the gas having a predetermined mass set in the meter) corresponds to the heat amount of the fuel gas. The present inventors have found that the flow rate of the heat-increasing fuel gas mixed with the main fuel gas can be adjusted according to the increase / decrease in the mass flow rate measured by the mass flow rate measuring means.
That is, in the configuration including the second mass flow rate measuring means, the second control means, and the flow rate adjusting means, the second mass flow rate measuring means has the required main fuel gas calorie of the main fuel gas at the installation position. A flow rate (second mass flow rate) of a gas having a predetermined mass is measured. When the amount of heat of the main fuel gas flowing through the installation position is insufficient with respect to the required amount of heat of the main fuel gas, the second mass flow rate is measured as a value on the low flow rate side.
When the flow rate on the low flow rate side is measured in this way, the heat amount of the mixed gas is insufficient even if the fuel gas for increasing the heat in a predetermined ratio is mixed with the main fuel gas. Generates a second control command for increasing the heat-increasing fuel gas mixed with the main fuel gas from the current state, and the flow rate adjusting means operates according to the second control command. As a result, by simply installing a general mass flow meter in the main fuel gas supply system, it is possible to easily and inexpensively adjust the amount of heat in increasing the temperature of the mixed gas.

[Third feature configuration]
A further characteristic configuration of the heat quantity adjusting device of the present invention is as follows.
A main fuel gas supply system for flowing main fuel gas in a predetermined pressure state; and a heat increase fuel gas supply system for flowing heat increase fuel gas mixed in the main fuel gas in a predetermined pressure state; A mixed gas supply system through which a mixed gas in which the main fuel gas is mixed with the fuel gas for increasing heat flows, and a heat quantity for adjusting the mixed gas led to the downstream side of the mixed gas supply system to a target heat quantity An adjustment device,
A flow rate adjusting means for adjusting a flow rate of the heat increasing fuel gas flowing through the heat increasing fuel gas supply system;
A first mass flow rate measuring means for measuring a first mass flow rate that is a mass flow rate of the mixed gas having a target heat amount required for the mixed gas after the heat increase is provided in the mixed gas supply system,
A second mass flow rate measuring means for measuring a second mass flow rate which is a mass flow rate of the main fuel gas having a main fuel gas calorific value required for the main fuel gas flowing through the main fuel gas supply system is provided in the main fuel gas supply system. In preparation for
Third control for adjusting the heat amount of the mixed gas to the target heat amount based on the first mass flow rate and the second mass flow rate measured by the first mass flow rate measuring unit and the second mass flow rate measuring unit. A third control means for generating a command;
The flow rate adjusting means receives the third control command generated by the third control means and adjusts the flow rate of the heat increasing fuel gas flowing through the heat increasing fuel gas supply system. .

This invention also pays attention to the fact that the mass flow rate measured by the mass flow rate measuring means (specifically, the mass flow meter for measuring the flow rate of the gas having a predetermined mass set in the meter) corresponds to the heat amount of the fuel gas. The present inventors have found that the flow rate of the heat-increasing fuel gas mixed with the main fuel gas can be adjusted according to the increase / decrease in the mass flow rate measured by the mass flow rate measuring means.
That is, in the configuration provided with the first mass flow measurement means, the second mass flow measurement means, the third control means, and the flow rate adjustment means, the first mass flow measurement means has the required mixing at the installation position. The flow rate of gas having a predetermined mass of the target heat quantity of gas (value as the first mass flow rate) is measured. On the other hand, the second mass flow rate measuring means measures a flow rate (a value as the second mass flow rate) of a predetermined mass gas having the required amount of heat of the main fuel gas at the measurement position. Here, when the fuel gas for heat increase is mixed at an appropriate ratio with respect to the main fuel gas, the flow rate measured by the first mass flow rate measuring means is the increase (heat increase) of the gas mass accompanying the mixing. As a result, the value as the first mass flow rate measured by the first mass flow rate measuring unit coincides with the value as the second mass flow rate measured by the second mass flow rate measuring unit. To do.

  Therefore, in the third control means, a third control command is generated so that the value as the first mass flow rate and the value as the second mass flow rate coincide with each other, and the flow rate adjustment is performed according to the third control command. Means work. As a result, by simply installing a general mass flow meter in the main fuel gas supply system, it is possible to easily and inexpensively adjust the amount of heat in increasing the temperature of the mixed gas.

  Here, regarding the generation of the third control command in the third control unit, the flow rate of the fuel gas for heat increase was adjusted by the flow rate adjusting unit according to the measurement values of the first mass flow rate measuring unit and the second mass flow rate measuring unit. The control characteristics of the case may be examined, and for example, it may be configured so that proportional control, first-order lag control, integration control, and the like can be performed.

In the invention described so far, the configuration for the purpose of adjusting (increasing the heat) the heat amount of the mixed gas to the target heat amount which is a desired heat amount has been described.
In the following description, in addition to the above adjustment (increase in heat) to the target heat amount, control of the total heat amount supplied to the fuel gas consumption unit (supplied heat and supply of a mixed gas having a predetermined target heat amount at a predetermined flow rate) Control) will be described.

[Fourth feature configuration]
A further characteristic configuration of the heat quantity adjusting device of the present invention is as follows.
A main fuel gas supply system for flowing main fuel gas in a predetermined pressure state; and a heat increase fuel gas supply system for flowing heat increase fuel gas mixed in the main fuel gas in a predetermined pressure state; A mixed gas supply system through which a mixed gas in which the main fuel gas is mixed with the fuel gas for increasing heat flows, and a heat quantity for adjusting the mixed gas led to the downstream side of the mixed gas supply system to a target heat quantity An adjustment device,
A flow rate adjusting means for adjusting a flow rate of the heat increasing fuel gas flowing through the heat increasing fuel gas supply system;
A first mass flow rate measuring means for measuring a first mass flow rate that is a mass flow rate of the mixed gas having a target heat amount required for the mixed gas after the heat increase is provided in the mixed gas supply system,
A volumetric flow rate measuring means for measuring a volumetric flow rate of the mixed gas flowing through the mixed gas supply system;
Based on the first mass flow rate measured by the first mass flow rate measuring means and the volumetric flow rate measured by the volumetric flow rate measuring means, the heat amount of the mixed gas is set as the target heat amount, and the volume flow rate of the mixed gas is set as the target heat amount. A fourth control means for generating a fourth control command for adjusting to the target flow rate;
The flow rate adjusting means receives the fourth control command generated by the fourth control means, and adjusts the flow rate of the heat increasing fuel gas flowing through the heat increasing fuel gas supply system. .

Even in this configuration, for the heat increase of the mixed gas, the measurement value of the first mass measuring means is the same as the control configuration described in the first characteristic configuration. That is, a 4th control means adjusts the calorie | heat amount of mixed gas to a target calorie | heat amount (heat increase adjustment) by providing the functional part as a 1st control means demonstrated previously.
Further, the fourth control means is provided with a functional part having the volumetric flow rate of the mixed gas as a target flow rate based on the volumetric flow rate measured by the volumetric flow rate measuring means.
Here, the superiority or inferiority of which control is prioritized is such that the volumetric flow rate of the mixed gas falls within the predetermined target flow rate range, provided that the heat amount of the mixed gas is within the predetermined target heat amount range. Can be controlled.
As a result, a mixed gas having a predetermined target heat amount can be supplied at a predetermined target flow rate, and even the total heat amount of the mixed gas can be adjusted.

[Fifth feature configuration]
A further characteristic configuration of the heat quantity adjusting device of the present invention is as follows.
A main fuel gas supply system for flowing main fuel gas in a predetermined pressure state; and a heat increase fuel gas supply system for flowing heat increase fuel gas mixed in the main fuel gas in a predetermined pressure state; A mixed gas supply system through which a mixed gas in which the main fuel gas is mixed with the fuel gas for increasing heat flows, and a heat quantity for adjusting the mixed gas led to the downstream side of the mixed gas supply system to a target heat quantity An adjustment device,
A flow rate adjusting means for adjusting a flow rate of the heat increasing fuel gas flowing through the heat increasing fuel gas supply system;
A first mass flow rate measuring means for measuring a first mass flow rate that is a mass flow rate of the mixed gas having a target heat amount required for the mixed gas after the heat increase is provided in the mixed gas supply system,
The main fuel gas supply system is provided with a second mass flow rate measuring means for measuring a second mass flow rate which is a mass flow rate of the main fuel gas having the main fuel gas calorific value required for the main fuel gas flowing through the main fuel gas supply system. Prepared,
Furthermore, it comprises specific gravity measuring means for measuring the specific gravity of the main fuel gas flowing through the main fuel gas supply system,
Based on the first mass flow rate measured by the first mass flow rate measurement unit and the second mass flow rate measurement unit and the specific gravity measured by the second mass flow rate and specific gravity measurement unit, the heat quantity of the mixed gas is determined as the target. A fifth control means for generating a fifth control command for adjusting the flow rate to the target flow rate in the amount of heat;
The flow rate adjusting means receives the fifth control command generated by the fifth control means and adjusts the flow rate of the heat increasing fuel gas flowing through the heat increasing fuel gas supply system.

This configuration is a technology obtained by further developing the third feature configuration described above.
In the third characteristic configuration described above, the third control unit causes the first mass flow rate measured by the first mass flow rate measurement unit and the second mass flow rate measured by the second mass flow rate measurement unit to coincide with each other. In addition, a third control command is generated, and the flow rate adjusting means works according to the third control command. As a result, by simply installing a general mass flow meter in the main fuel gas supply system, it is possible to easily and inexpensively adjust the amount of heat in increasing the temperature of the mixed gas.
Therefore, by providing the fifth control means with a functional portion corresponding to the third control means, the amount of heat of the mixed gas is adjusted to the target amount of heat. Only this functional part cannot control the total amount of heat of the mixed gas.

Therefore, the main fuel gas supply system is provided with specific gravity measuring means to measure the true specific gravity of the main fuel gas (the true amount of heat of the main fuel gas).
Here, since the second mass flow rate measuring means is a means for measuring the mass flow rate of the calorific gas (calorific value gas) required for the main fuel gas, if the true specific gravity of the main fuel gas is found, From the mass flow rate measured by the mass flow rate measuring means, the true flow rate of the main fuel gas that is currently flowing is determined.
When the mixing amount of the fuel gas for increasing heat is adjusted according to the third characteristic configuration, the mixed gas having the target heat amount can be obtained as much as the true flow rate of the main fuel gas that is currently flowing. It is possible to control the heat quantity and the flow rate.

Here, regarding the correction of the flow rate measured by the second mass flow rate measuring unit when the specific gravity is obtained by the specific gravity measuring unit in the fifth control unit, the output of the specific gravity measuring unit and the main fuel gas are supplied in advance. What is necessary is just to comprise so that the above-mentioned correction | amendment can be performed by investigating the relationship of the output of the 2nd mass flow measurement means when measuring the mass flow rate of the gas of the predetermined calorie | heat amount.
From the above, by using the first mass flow measuring means, the second mass flow measuring means, the specific gravity measuring means and the fifth control means unique to the present application, the structure is relatively simple and the manufacturing cost can be suppressed appropriately. A calorific value adjustment device capable of adjusting the calorific value can be realized.

It is a schematic block diagram of the calorie | heat amount adjustment apparatus which concerns on 1st Embodiment of this invention. It is a schematic block diagram of the calorie | heat amount adjustment apparatus which concerns on 2nd Embodiment of this invention. It is a schematic block diagram of the calorie | heat amount adjustment apparatus which concerns on 3rd Embodiment of this invention. It is a schematic block diagram of the calorie | heat amount adjustment apparatus which concerns on 4th Embodiment of this invention. It is a schematic block diagram of the calorie | heat amount adjustment apparatus which concerns on 5th Embodiment of this invention.

The calorific value adjustment device of the present invention has a mass flow rate measuring means (specifically, mass flow meters 14 and 26 for measuring a flow rate of a gas having a predetermined mass set in a meter) that has a mass flow rate of fuel gas. Focusing on the point corresponding to the amount of heat, it has been found that the amount of the heat-increasing fuel gas G2 mixed with the main fuel gas G1 can be adjusted according to the increase or decrease in the mass flow rate measured by the mass flow meters 14, 26. , Completed.
In addition, the calorie | heat amount adjustment apparatus which concerns on 1st, 2nd, 3rd embodiment shown below aims at adjusting the heat amount of mixed gas G3 to target heat amount TQ1 which is desired heat amount (heat increase). In addition to the adjustment (heat increase) to the target heat amount TQ1 described above, the heat amount adjustment device according to the fourth and fifth embodiments controls the total heat amount supplied to the fuel gas consumption unit (heat is increased). The purpose is to control the supply of a mixed gas G3 having a predetermined target heat quantity TQ1 at a predetermined flow rate.

[First Embodiment]
The calorific value adjusting device according to the first embodiment increases heat by mixing a low-calorie main fuel gas G1 (for example, city gas 13A) with a high-calorie heat increase fuel gas G2 (for example, LPG). In this embodiment, the mixed gas G3 obtained by mixing the main fuel gas G1 with the heat-increasing fuel gas G2 is adjusted to a desired target heat quantity TQ1.
Then, as shown in FIG. 1, the main fuel gas supply system 10 for flowing the main fuel gas G1 in a predetermined pressure state and the heat increasing fuel gas G2 mixed with the main fuel gas G1 in a predetermined pressure state. A heat-increasing fuel gas supply system 11 that flows through, and a gas mixture system 12 through which a mixed gas G3 in which the heat-increasing fuel gas G2 is mixed with the main fuel gas G1 flow. The mixed gas G3 guided to the downstream side is configured to be adjusted to the target heat amount TQ1. This calorific value adjusting device is provided with a flow rate adjusting valve 13 (an example of a flow rate adjusting means) for adjusting the flow rate of the heat increasing fuel gas flowing through the heat increasing fuel gas supply system 11, and the mixed gas G3 after the heat increase is provided. The mixed gas supply system 12 includes a first mass flow meter 14 (an example of a first mass flow measuring means) that measures a first mass flow rate that is a mass flow rate of the mixed gas G3 having the required target heat quantity TQ1. A control device 15 (an example of a first control unit) that generates a first control command for adjusting the amount of heat of the mixed gas G3 to the target heat amount TQ1 based on the first mass flow rate measured by the 1 mass flow meter 14 is provided. Yes. The flow rate adjusting valve 13 receives the first control command generated by the control device 15 and adjusts the flow rate of the heat increasing fuel gas G2 flowing through the heat increasing fuel gas supply system 11.

The main fuel gas supply system 10 includes a main fuel gas channel 16 through which the main fuel gas G1 flows, a pressure measuring device 17 that measures the pressure of the main fuel gas G1 in the main fuel gas channel 16, and the pressure A pressure regulating valve 18 for adjusting the pressure of the main fuel gas G1 to a constant pressure based on the measurement result of the pressure measuring device 17 on the upstream side of the measuring device 17, and the main fuel gas G1 on the downstream side of the pressure regulating valve 18 Is provided with a check valve 19 for preventing the air from flowing back to the upstream side.
Also for the heat-increasing fuel gas supply system 11, the heat-increasing fuel gas channel 20 through which the heat-increasing fuel gas G2 flows, and the pressure of the heat-increasing fuel gas G2 in the heat-increasing fuel gas channel 20 A pressure measuring valve 21 that measures the pressure of the heat-increasing fuel gas G2 to a constant pressure based on the measurement result of the pressure measuring device 21 upstream of the pressure measuring device 21, A check valve 23 is provided on the downstream side of the pressure regulating valve 22 to prevent the heat-increasing fuel gas G2 from flowing back to the upstream side.
The mixed gas supply system 12 includes a mixing device 24 for appropriately mixing the main fuel gas G1 and the heat-increasing fuel gas G2 on the upstream side of the first mass flow meter 14, and mixing on the downstream side thereof. And a pressure measuring device 25 for measuring the pressure of the gas G3.

  The first mass flow meter 14 provided in the mixed gas supply system 12 corresponds to the target heat amount TQ1 of the mixed gas G3 as the first mass flow rate when the required flow rate of the target heat amount TQ1 of the mixed gas G3 is measured. When measuring the flow rate of the mixed gas G3 that outputs a value equal to the target mass flow rate TL1 and has a heat quantity LQ lower than the target heat amount TQ1, the target mass flow rate TL1 corresponding to the target heat amount TQ1 of the mixed gas G3 is used as the first mass flow rate. Is also configured to output the value L1 on the low flow rate side.

Based on the first mass flow rate measured by the first mass flow meter 14, the control device 15 generates a first control command for adjusting the heat amount of the mixed gas G 3 to the target heat amount TQ 1, and sends it to the flow rate adjustment valve 13. Specifically, the first control command is a control related to the valve opening degree of the flow rate adjusting valve 13 that adjusts the flow rate of the heat increasing fuel gas G2 in the heat increasing fuel gas supply system 11. Signal. Based on the first control command, the flow rate adjustment valve 13 adjusts the valve opening degree in such a manner that the valve opening degree is increased as the first mass flow rate is lower than the target mass flow rate TL1.
The control device 15 has a storage unit (not shown) that stores in advance the relationship between the first mass flow rate and the valve opening degree of the flow rate adjustment valve 13 for each target mass flow rate TL1 of the mixed gas G3. . That is, the control device 15 stores in advance the control characteristics when the flow rate adjustment of the heat-increasing fuel gas G2 by the flow rate adjustment valve 13 is performed according to the measurement value of the first mass flow meter 14, and the stored control is performed. Based on the characteristics, a first control command for performing proportional control, first-order lag control, integral control, and the like is output.

Below, an example of the specific control of the flow control valve 13 based on the 1st mass flow by the said control apparatus 15 is shown. In the following, it is assumed that the main fuel gas G1 is supplied with a low heat quantity LQ, and the heat quantity of the mixed gas G3 supplied downstream is set as a target heat quantity TQ1.
When the mixed gas G3 having a low heat quantity LQ flows through the mixed gas supply system 12, the first mass flow meter 14 outputs a low flow rate value L1 corresponding to the low heat quantity LQ as the first mass flow rate. The control device 15 compares the value L1 on the low flow rate side as the first mass flow rate with the target mass flow rate TL1 of the mixed gas G3 corresponding to the target heat amount TQ1 stored in advance. When the value L1 on the low flow rate side as the first mass flow rate is lower than the target mass flow rate TL1 of the mixed gas G3, the opening degree of the flow rate adjustment valve 13 is adjusted to a predetermined opening degree on the valve opening side. Thereby, the heat quantity of the mixed gas G3 supplied downstream is adjusted to increase in heat to the target heat quantity TQ1.
That is, by configuring the mass flow meter to use the first mass flow rate as the output of the first mass flow meter 14 in this way, the general mass flow meter is simply installed in the mixed gas supply system 12. The heat increase adjustment of the mixed gas G3 can be executed.

[Second Embodiment]
As shown in FIG. 2, the heat quantity adjusting device of the second embodiment has a second mass flow meter 26 provided in the main fuel gas supply system 10 instead of the first mass flow meter 14 of the first embodiment. And the control of the control device 15 (an example of second control means) based on the measurement result of the second mass flow meter 26. Therefore, in the following, the same components as those in the first embodiment will be denoted by the same reference numerals, and description thereof may be omitted.

  The calorie | heat amount adjustment apparatus which concerns on 2nd Embodiment adjusts the 2nd mass flow rate which is the mass flow rate of the main fuel gas G2 which has the main fuel gas calorie | heat amount TQ2 requested | required of the main fuel gas G1 which flows through the main fuel gas supply system 10. A second mass flow meter 26 to be measured is provided in the main fuel gas supply system 10, and the heat amount of the mixed gas G3 is adjusted to the target heat amount TQ1 based on the second mass flow rate measured by the second mass flow meter 26. 2 is provided with a control device 15 (an example of a second control means) that generates a control command, and a flow rate adjusting valve 13 that is provided in the heat increase fuel gas supply system 11 and adjusts the flow rate of the heat increase fuel gas G2 is provided in the control device. In response to the second control command generated at 15, the flow rate of the heat-increasing fuel gas G2 flowing through the heat-increasing fuel gas supply system 11 is adjusted.

The second mass flow meter 26 provided in the main fuel gas supply system 10 measures the target heat quantity TQ2 of the main fuel gas G1 as the second mass flow rate when measuring the required flow quantity of the target heat quantity TQ2 of the main fuel gas G1. When the flow rate of the main fuel gas G1 having a heat quantity lower than the target heat quantity TQ2 is measured, a value corresponding to the target heat quantity TQ2 of the main fuel gas G1 is output as the second mass flow rate. A value L1 on the lower flow rate side than the mass flow rate TL2 is output.
The control device 15 has a storage unit (not shown) that stores in advance the relationship between the second mass flow rate and the valve opening degree of the flow rate adjustment valve 13 for each target mass flow rate TL2 of the main fuel gas G1. The control device 15 is configured to output a second control command based on the relationship stored in the storage unit.
Hereinafter, an example of the control of the flow rate adjustment valve 13 based on the second mass flow rate by the control device 15 will be shown.

When the main fuel gas G1 is supplied to the main fuel gas supply system 10, the second mass flow meter 26 outputs a second mass flow rate corresponding to a predetermined amount of heat of the main fuel gas G1. When the control unit 15 compares the second mass flow rate with the target mass flow rate TL2 of the main fuel gas G1, the control device 15 supplies the main fuel gas G1 having the required main fuel gas heat quantity TQ2 without any problem. A second control for supplying the fuel gas G2 for increasing heat with a predetermined amount of heat to the amount of heat of the main fuel gas G1 (required amount of heat of main fuel gas TQ2). Generate directives. Based on the second control command, the flow rate adjusting valve 13 sets the opening degree to a previously stored target opening degree. Thereby, the fuel gas G2 for increasing heat is mixed with the main fuel gas G1 having the required main fuel gas calorific value TQ2 at a constant ratio, and the calorific value of the mixed gas G3 is adjusted to increase to the required target calorie TQ1. Can do.
On the other hand, when the amount of heat of the main fuel gas G1 flowing through the main fuel gas supply system 10 is insufficient with respect to the required amount of main fuel gas heat TQ2, the second mass flow meter 26 sets the second mass flow rate as the second mass flow rate. The value L3 on the low flow rate side is output. In this case, when the control device 15 compares the low flow rate value L3 and the target mass flow rate TL2 of the main fuel gas G1 as the second mass flow rate, the low flow rate value L3 is smaller than the target mass flow rate TL2. The control device 15 determines that the heat quantity of the main fuel gas G1 is smaller than the required main fuel gas heat quantity TQ2. As a result, the control device 15 supplies the heat quantity of the heat increase fuel gas G2 to a quantity of heat that is greater than a predetermined ratio of quantity of heat with respect to the required main fuel gas quantity of heat TQ2. Is generated. The flow rate adjustment valve 13 sets the opening degree to a larger opening degree based on the second control command. Thereby, the calorie | heat amount of mixed gas G3 can be adjusted so that it may approach target calorie | heat amount TQ1.

[Third Embodiment]
In the present invention, the first mass flow rate and the first mass flow rate measuring means (specifically, the first and second mass flow meters 14 and 26 for measuring the flow rate of the gas having a predetermined mass set in the meter) are also measured. Focusing on the point that the 2 mass flow rate corresponds to the heat quantity of the fuel gas to be measured, the heat increase mixed with the main fuel gas G1 according to the increase or decrease of the mass flow rate measured by the first and second mass flow meters 14 and 26 And found that the flow rate of the fuel gas G2 can be adjusted.

  In the calorific value adjustment device according to the third embodiment, the first mass flow meter 14 is provided in the mixed gas supply system 12, and the second mass flow meter 26 is provided in the main fuel gas supply system 10. It is characterized by control by the control device 15 (an example of third control means) based on the outputs of the mass flow meter 14 and the second mass flow meter 26. Since there is no difference from the first and second embodiments with respect to other points, the same components as those in the first and second embodiments are denoted by the same reference numerals, and description thereof may be omitted. is there.

  As shown in FIG. 3, the heat quantity adjusting device of the third embodiment measures the first mass flow rate that is the mass flow rate of the mixed gas G3 having the target heat amount TQ1 required for the mixed gas G3 after the heat increase. The mass flow rate of the main fuel gas G1 having the main fuel gas heat quantity TQ2 required for the main fuel gas G1 flowing through the main fuel gas supply system 10 is provided in the mixed gas supply system 12 with the 1 mass flow meter 14 A second mass flow meter 26 for measuring two mass flow rates is provided in the main fuel gas supply system 10, and a value L1 as the first mass flow rate measured by the first mass flow meter 14 and the second mass flow meter 26, and the first A control device 15 (an example of third control means) that generates a third control command for adjusting the amount of heat of the mixed gas G3 to the target amount of heat TQ1 based on the value L3 as the two mass flow rates, and supplying the fuel gas for increasing heat Provided in system 11 The flow rate adjusting valve 13 is configured to adjust the flow rate of the heat-increasing fuel gas G2 flowing through the heat-increasing fuel gas supply system 11 in response to the third control command generated by the control device 15. Has been.

In the third to fifth embodiments, the value L1 as the first mass flow rate and the value L3 as the second mass flow rate indicate the indicated values of the first mass flow meter 14 and the second mass flow meter 26. Specifically, for example, the physical quantity is (liter / min).
The first mass flow meter 14 and the second mass flow meter 26 are configured to be able to set the target mass of the gas to be measured, and the first mass flow meter 14 includes the target mass of the mixed gas G3. A mass (amount of heat) is set, and a target mass (amount of heat) of the main fuel gas G1 is set in the second mass flow meter 26. The value L1 as the first mass flow rate and the value L3 as the second mass flow rate are measured based on the set target mass (heat amount).
For example, the first mass flow meter 14 is measured when the main fuel gas G1 in a state before the calorific value is adjusted as it is with the first mass flow meter 14 and when measured with the second mass flow meter 26. Since the target mass (heat amount) set by the second mass flow meter 26 is larger, the value L1 as the first mass flow rate is smaller than the value L3 as the second mass flow rate. Therefore, in the third embodiment, the supply amount of the heat increasing fuel gas G2 is controlled so that the value L1 as the first mass flow rate matches the value L3 as the second mass flow rate. As a result, the mixed gas G3 is guided downstream in a state in which the mass (heat amount) is adjusted to the target mass (heat amount). Hereinafter, the control of the supply amount of the heat increasing fuel gas G2 will be specifically described.

The control device 15 has a storage unit (not shown) that stores in advance the relationship between the first mass flow rate, the second mass flow rate, and the valve opening degree of the flow rate adjustment valve 13 for each target mass flow rate TL1 of the mixed gas G3. is doing. That is, the control device 15 performs control characteristics when the flow rate adjustment valve 13 adjusts the flow rate of the fuel gas G2 for heat increase according to the measurement values (instruction values) of the first mass flow meter 14 and the second mass flow meter 26. Are stored in advance, and based on the stored control characteristics, a third control command for performing proportional control, first-order lag control, integral control, and the like is output.
Hereinafter, adjustment of the valve opening degree of the flow rate adjusting valve 13 by the control device 15 when the heat of the mixed gas G3 is increased in the heat quantity adjusting device of the present invention will be described.

In the mixed gas supply system 12, the first mass flow meter 14 measures the flow rate of a gas having a predetermined mass corresponding to the required target heat quantity TQ1 of the mixed gas G3. On the other hand, the second mass flow meter 26 measures the flow rate of the gas having a predetermined mass of the required main fuel gas calorific value TQ2 in the main fuel gas supply system 10. Here, when the fuel gas G2 for heat increase is mixed at an appropriate ratio with respect to the main fuel gas G1, the flow rate measured by the first mass flow meter 14 is an increase in gas mass due to mixing (heat increase). As a result, the value L1 as the first mass flow rate measured by the first mass flow meter 14 and the value as the second mass flow rate measured by the second mass flow meter 26 are obtained. It matches L3.
Therefore, the control device 15 causes the value L1 as the first mass flow rate measured by the first mass flow meter 14 and the value L3 as the second mass flow rate measured by the second mass flow meter 26 to coincide with each other. The third control command is generated. The flow rate adjusting valve 13 adjusts the opening degree according to the third control command. Thereby, only by installing a general mass flow meter in the main fuel gas supply system 10, the heat increase adjustment of the heat quantity of the mixed gas G3 can be realized simply and at low cost.

[Fourth Embodiment]
The heat quantity adjusting device according to the fourth embodiment is a further development of the heat quantity adjusting device according to the first embodiment. The calorific value adjusting device according to the fourth embodiment is configured so that the heat increase of the mixed gas G3 can be adjusted similarly to the first to third embodiments described so far, and the mixed gas G3 supplied to the downstream side. The total heat quantity can be controlled (control for supplying a predetermined flow rate of the mixed gas G3 having a predetermined target heat quantity TQ1 increased in temperature). And the control apparatus which also considered the point provided with the flowmeter 27 (an example of a volumetric flow measurement means) which measures the volumetric flow VL of the mixed gas G3 which flows through the mixed gas supply system 12, and the measurement result of the said flowmeter 27 15 (an example of fourth control means) is characterized by control. In addition, since it is the same as that of the structure shown in the said 1st Embodiment about the structure other than these, it shall attach | subject the same code | symbol and may omit the description.

In addition to the configuration of the heat quantity adjusting device according to the first embodiment, the heat quantity adjusting device according to the fourth embodiment includes a flow meter 27 (volume) that measures the volume flow rate VL of the mixed gas G3 flowing through the mixed gas supply system 12. An example of a flow rate measuring means), and based on the value L1 as the first mass flow rate measured by the first mass flow meter 14 and the volume flow rate VL measured by the flow meter 27, the heat amount of the mixed gas G3 is determined as the target heat amount. TQ1 includes a control device 15 (an example of fourth control means) that generates a fourth control command for adjusting the volumetric flow rate VL of the mixed gas G3 to the target flow rate TV, and is provided in the heat-increasing fuel gas supply system 11. A flow rate adjustment valve 13 that adjusts the flow rate of the thermal fuel gas G2 receives the fourth control command from the control device 15 and adjusts the flow rate of the thermal increase fuel gas G2.
For each target mass flow rate TL1 of the mixed gas G3, the control device 15 determines the relationship between the first mass flow rate and the valve opening degree of the flow rate adjustment valve 13, and the relationship between the volume flow rate VL and the valve opening degree of the flow rate adjustment valve 13. A storage unit (not shown) is stored. That is, the control device 15 stores in advance control characteristics when the flow rate adjustment of the fuel gas G2 for heat increase by the flow rate adjustment valve 13 is performed according to the measurement values of the first mass flow meter 14 and the flow meter 27, Based on the stored control characteristics, proportional control, first-order lag control, integral control, and the like are performed.
Thus, in the calorie | heat amount adjustment apparatus of the said 4th Embodiment, regarding the heat increase of the mixed gas G3, the measured value (indication value) of the 1st mass flow meter 14 is the control structure demonstrated in the said 1st Embodiment. Use the same as above. That is, the control device 15 (an example of the fourth control unit) includes the functional part as the first control unit described in the first embodiment, and includes the fourth control command including the first control command of the first control unit. And the flow rate adjustment valve 13 adjusts the valve opening based on the fourth control command, thereby adjusting the heat amount of the mixed gas G3 to the target heat amount TQ1 (heat increase adjustment).
When the control device 15 functions as the fourth control means, the control device 15 uses the volume flow VL of the mixed gas G3 as the target flow TV based on the volume flow VL measured by the flow meter 27. The flow rate of the mixed gas G3 can be adjusted to the target flow rate TV in such a manner that the flow rate adjustment valve 13 adjusts the valve opening according to the fourth control command.
That is, the control device 15 functioning as the fourth control means generates the fourth control command based on the measured value (indicated value) of the first mass flow meter 14 and the measured value of the flow meter 27. It is configured.
Here, the superiority or inferiority of adjusting the heat amount of the mixed gas G3 to the target heat amount TQ1 (heat increase adjustment) or adjusting the flow rate of the mixed gas G3 to the target flow rate TV (flow rate adjustment) is the mixed gas G3. Is within a predetermined target heat amount range (for example, a predetermined range centered on the target heat amount TQ1), the volumetric flow rate VL of the mixed gas G3 is set to a predetermined target flow range (for example, It can be controlled to fall within a predetermined range centered on the target flow rate TV.
As a result, in the flow rate adjusting device in the fourth embodiment, by adopting a relatively simple configuration in which a general mass flow meter is equipped with a flow meter, the mixed gas G3 is appropriately heated, and the flow rate is adjusted appropriately. It is possible to adjust so-called adjustment of the total heat quantity of the mixed gas G3.

[Fifth Embodiment]
The calorific value adjustment device according to the fifth embodiment is a technology that is a further development of the calorific value adjustment device according to the third embodiment, and can adjust the total calorific value of the mixed gas G3 while increasing the calorific value thereof. To do. Specifically, a point including a hydrometer 28 (an example of a specific gravity measuring unit) that measures the specific gravity of the main fuel gas G1 flowing through the main fuel gas supply system 10 and the measurement result of the hydrometer 28 are also taken into account. There is a feature in the control of the control device 15 (an example of fifth control means). Since the configuration other than this is the same as the configuration according to the third embodiment, the same reference numerals are used, and the description thereof may be omitted.

  The calorific value adjustment device according to the fifth embodiment includes a hydrometer 28 (an example of specific gravity measuring means) that measures the specific gravity SG of the main fuel gas G1 flowing through the main fuel gas supply system 10, and includes the first mass flow meter 14 and the first mass flow meter 14. Based on the value L1 as the first mass flow rate measured by the two mass flow meter 26, the value L3 as the second mass flow rate, and the specific gravity SG measured by the hydrometer 28, the heat amount of the mixed gas G3 is set to the target heat amount TQ1. Are provided with a control device 15 (an example of fifth control means) for generating a fifth control command for adjusting the flow rate to the target flow rate TV, and the flow rate of the heat-increasing fuel gas G2 in the heat-increasing fuel gas supply system 11 is adjusted. The flow rate adjusting valve 13 to be adjusted is configured to adjust the flow rate of the heat-increasing fuel gas G2 flowing through the heat-increasing fuel gas supply system 11 in response to the fifth control command generated by the control device 15. ing.

In the calorific value adjusting device according to the third embodiment described above, the control device 15 has a value L1 as the first mass flow rate measured by the first mass flow meter 14 and a second mass flow meter 26 measured by the second mass flow meter 26. The third control command is generated so that the value L3 as the 2 mass flow rate matches. And the flow volume adjustment valve 13 can adjust the valve opening degree according to the said 3rd control command.
That is, in the heat quantity adjusting device according to the fifth embodiment, the heat amount of the mixed gas G3 is adjusted to the target heat amount TQ1 when the control device 15 includes a functional portion corresponding to the third control means. However, it is impossible to control the total amount of heat of the mixed gas G3 only by the functional part related to the third control means.

Therefore, in the flow control device according to the fifth embodiment, as described above, the main fuel gas supply system 10 includes the hydrometer 28, and the true specific gravity SG of the main fuel gas G1 (the true amount of heat of the main fuel gas G1). Is configured to measure.
Here, since the second mass flow meter 26 is a means for measuring the mass flow rate of the calorie gas (calorific value gas) required for the main fuel gas G1, the true specific gravity SG of the main fuel gas G1 is found. From the mass flow rate measured by the second mass flow meter 26, the true flow rate (volumetric flow rate) of the currently flowing main fuel gas G1 is determined.
Here, when the control device 15 adjusts the flow rate of the fuel gas G2 for heat increase in accordance with the control shown in the heat quantity adjusting device according to the third embodiment, as a result, the main fuel gas G1 that is currently flowing is changed. The mixed gas G3 having the target heat quantity TQ1 is obtained by the true flow rate, and both the heat quantity and the flow rate can be controlled.

Here, when the control device 15 functioning as the fifth control unit outputs a fifth control command for correcting the flow rate measured by the second mass flow meter 26 based on the specific gravity SG measured by the hydrometer 28, the control is performed. The device 15 performs the fifth control based on the relationship between the output of the hydrometer 28 measured in advance and the output of the second mass flow meter 26 when measuring the mass flow rate of the heat gas supplied to the main fuel gas G1. It is configured to output a command.
As a result, even with a relatively simple configuration including a mass flow meter and a specific gravity meter, it is possible to realize a heat quantity adjusting device capable of appropriately adjusting the heat quantity while suppressing the manufacturing cost.

[Another embodiment]
(1) In the above embodiment, the flow rate adjusting valve 13 is provided as the flow rate adjusting means. However, for example, a mass flow rate adjusting device capable of adjusting the mass flow rate directly corresponding to the heat amount of the fuel gas G2 for heat increase. (Mass flow controller) may be provided.

  The heat quantity adjusting device of the present invention has a simple structure and can be effectively used as a heat quantity adjusting device capable of appropriately adjusting the heat quantity of the mixed gas while suppressing the equipment cost.

G1: Main fuel gas G2: Fuel gas G3 for increasing heat: Mixed gas TQ1: Target heat amount TQ2 of mixed gas: Target heat amount L1 of main fuel gas: Value on the low flow rate side (first mass flow rate)
L3: Value on the low flow rate side (second mass flow rate)
VL: Volumetric flow rate SG: Specific gravity 10: Main fuel gas supply system 11: Fuel gas supply system for heat increase 12: Mixed gas supply system 13: Flow rate adjustment valve (an example of flow rate adjustment means)
14: 1st mass flow meter (an example of 1st mass flow measurement means)
15: Control device (an example of first to fifth control means)
26: second mass flow meter (an example of second mass flow measurement means)
27: Flow meter (an example of volumetric flow rate measuring means)
28: Specific gravity meter (an example of specific gravity measurement means)

Claims (5)

A main fuel gas supply system for flowing main fuel gas in a predetermined pressure state; and a heat increase fuel gas supply system for flowing heat increase fuel gas mixed in the main fuel gas in a predetermined pressure state; A mixed gas supply system through which a mixed gas in which the main fuel gas is mixed with the fuel gas for increasing heat flows, and a heat quantity for adjusting the mixed gas led to the downstream side of the mixed gas supply system to a target heat quantity An adjustment device,
A flow rate adjusting means for adjusting a flow rate of the heat increasing fuel gas flowing through the heat increasing fuel gas supply system;
A first mass flow rate measuring means for measuring a first mass flow rate that is a mass flow rate of the mixed gas having a target heat amount required for the mixed gas after the heat increase is provided in the mixed gas supply system,
Based on the first mass flow rate measured by the first mass flow rate measurement means, comprising first control means for generating a first control command for adjusting the heat quantity of the mixed gas to the target heat quantity,
A calorific value adjusting device for adjusting the flow rate of the heat-increasing fuel gas flowing through the heat-increasing fuel gas supply system in response to the first control command generated by the first control unit. . A main fuel gas supply system for flowing main fuel gas in a predetermined pressure state; and a heat increase fuel gas supply system for flowing heat increase fuel gas mixed in the main fuel gas in a predetermined pressure state; A mixed gas supply system through which a mixed gas in which the main fuel gas is mixed with the fuel gas for increasing heat flows, and a heat quantity for adjusting the mixed gas led to the downstream side of the mixed gas supply system to a target heat quantity An adjustment device,
A flow rate adjusting means for adjusting a flow rate of the heat increasing fuel gas flowing through the heat increasing fuel gas supply system;
A second mass flow rate measuring means for measuring a second mass flow rate which is a mass flow rate of the main fuel gas having a main fuel gas calorific value required for the main fuel gas flowing through the main fuel gas supply system is provided in the main fuel gas supply system. And prepare for
Based on the second mass flow rate measured by the second mass flow rate measurement means, comprising second control means for generating a second control command for adjusting the heat quantity of the mixed gas to the target heat quantity,
A calorific value adjusting device for adjusting the flow rate of the heat-increasing fuel gas flowing through the heat-increasing fuel gas supply system in response to the second control command generated by the second control unit. . A main fuel gas supply system for flowing main fuel gas in a predetermined pressure state; and a heat increase fuel gas supply system for flowing heat increase fuel gas mixed in the main fuel gas in a predetermined pressure state; A mixed gas supply system through which a mixed gas in which the main fuel gas is mixed with the fuel gas for increasing heat flows, and a heat quantity for adjusting the mixed gas led to the downstream side of the mixed gas supply system to a target heat quantity An adjustment device,
A flow rate adjusting means for adjusting a flow rate of the heat increasing fuel gas flowing through the heat increasing fuel gas supply system;
A first mass flow rate measuring means for measuring a first mass flow rate that is a mass flow rate of the mixed gas having a target heat amount required for the mixed gas after the heat increase is provided in the mixed gas supply system,
A second mass flow rate measuring means for measuring a second mass flow rate which is a mass flow rate of the main fuel gas having a main fuel gas calorific value required for the main fuel gas flowing through the main fuel gas supply system is provided in the main fuel gas supply system. In preparation for
Third control for adjusting the heat amount of the mixed gas to the target heat amount based on the first mass flow rate and the second mass flow rate measured by the first mass flow rate measuring unit and the second mass flow rate measuring unit. A third control means for generating a command;
A calorific value adjusting device for adjusting the flow rate of the heat-increasing fuel gas flowing through the heat-increasing fuel gas supply system in response to the third control command generated by the third control unit. . A main fuel gas supply system for flowing main fuel gas in a predetermined pressure state; and a heat increase fuel gas supply system for flowing heat increase fuel gas mixed in the main fuel gas in a predetermined pressure state; A mixed gas supply system through which a mixed gas in which the main fuel gas is mixed with the fuel gas for increasing heat flows, and a heat quantity for adjusting the mixed gas led to the downstream side of the mixed gas supply system to a target heat quantity An adjustment device,
A flow rate adjusting means for adjusting a flow rate of the heat increasing fuel gas flowing through the heat increasing fuel gas supply system;
A first mass flow rate measuring means for measuring a first mass flow rate that is a mass flow rate of the mixed gas having a target heat amount required for the mixed gas after the heat increase is provided in the mixed gas supply system,
A volumetric flow rate measuring means for measuring a volumetric flow rate of the mixed gas flowing through the mixed gas supply system;
Based on the first mass flow rate measured by the first mass flow rate measuring means and the volumetric flow rate measured by the volumetric flow rate measuring means, the heat amount of the mixed gas is set as the target heat amount, and the volume flow rate of the mixed gas is set as the target heat amount. A fourth control means for generating a fourth control command for adjusting to the target flow rate;
A calorific value adjusting device for adjusting the flow rate of the heat-increasing fuel gas flowing through the heat-increasing fuel gas supply system in response to the fourth control command generated by the fourth control unit. . A main fuel gas supply system for flowing main fuel gas in a predetermined pressure state; and a heat increase fuel gas supply system for flowing heat increase fuel gas mixed in the main fuel gas in a predetermined pressure state; A mixed gas supply system through which a mixed gas in which the main fuel gas is mixed with the fuel gas for increasing heat flows, and a heat quantity for adjusting the mixed gas led to the downstream side of the mixed gas supply system to a target heat quantity An adjustment device,
A flow rate adjusting means for adjusting a flow rate of the heat increasing fuel gas flowing through the heat increasing fuel gas supply system;
A first mass flow rate measuring means for measuring a first mass flow rate that is a mass flow rate of the mixed gas having a target heat amount required for the mixed gas after the heat increase is provided in the mixed gas supply system,
The main fuel gas supply system is provided with a second mass flow rate measuring means for measuring a second mass flow rate which is a mass flow rate of the main fuel gas having the main fuel gas calorific value required for the main fuel gas flowing through the main fuel gas supply system. Prepared,
Furthermore, it comprises specific gravity measuring means for measuring the specific gravity of the main fuel gas flowing through the main fuel gas supply system,
Based on the first mass flow rate measured by the first mass flow rate measurement unit and the second mass flow rate measurement unit and the specific gravity measured by the second mass flow rate and specific gravity measurement unit, the heat quantity of the mixed gas is determined as the target. A fifth control means for generating a fifth control command for adjusting the flow rate to the target flow rate in the amount of heat;
A calorific value adjusting device, wherein the flow rate adjusting means receives the fifth control command generated by the fifth control means and adjusts the flow rate of the heat increasing fuel gas flowing through the heat increasing fuel gas supply system.

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