JP2006077698A - Gas reforming equipment - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide gas reforming equipment capable of reforming low-calorie gas as stable fuel for a gas turbine. <P>SOLUTION: This gas reforming equipment is provided with a reformed gas manufacturing device 3 which has a natural gas (NG) supply line 7, an air supply line 8 and a reaction cylinder for manufacturing reformed gas containing hydrogen gas by mixing NG with air and reforming the mixed gas through chemical reaction; a mixing and adjusting device 5 for mixing low-calorie gas with reformed gas supplied from the reforming gas manufacturing device 3 and supplying the mixed gas to gas turbine equipment 1 as fuel gas; reformed gas supply piping 4 for supplying reformed gas from the reformed gas manufacturing device 3 to the mixing and adjusting device 5; fuel gas supply piping 2 for supplying fuel gas from the mixing and adjusting device 5 to the gas turbine equipment 1; and a control device 10 for controlling operation of the reformed gas manufacturing device 3 and the mixing and adjusting device 5. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a gas reforming facility. More specifically, when using low calorie gas (for example, blast furnace gas (BFG) and other iron production process by-product gas) as a gas turbine fuel, the low calorie gas is used to enable continuous stable combustion. The present invention relates to a gas reforming facility that adjusts a gas component or gas calorie of fuel gas by additionally mixing reformed gas.

  2. Description of the Related Art Conventionally, as an example of utilizing low calorie gas, there are an increasing number of cases where power generation or the like is performed by using a by-product gas such as BFG in the steelmaking field as a fuel for a gas turbine. On the other hand, since the energy efficiency in the blast furnace is improved, the calorific value of BFG as process exhaust gas is decreasing year by year. When such low calorie blast furnace gas is used as fuel, misfire of the gas turbine is likely to occur, and in the event of misfire, the gas turbine is stopped urgently. In addition, in the case of BFG with a low hydrogen content, the ignition flame holding property is poor, and therefore a misfire condition is likely to occur. Furthermore, some of the above low calorie gases vary in calorific value and generation amount.

  In order to solve this problem, it has been proposed to increase the calorific value and the amount of gas itself by combusting low calorie BFG with coke oven gas (also called COG) or natural gas (also called NG). (See Patent Document 1 and Patent Document 2).

  The reason for using COG is that it is easy to mix because COG is medium calorie gas and the calorie difference from low calorie gas is small, and the hydrogen content in low calorie gas is increased because the main component of COG is hydrogen. This is because the flame retardancy can be improved.

  However, COG is not a gas that is readily available everywhere. In addition, COG contains a large amount of ammonia, hydrogen cyanide and the like, and a large amount of harmful nitrogen oxides are generated by combustion. Furthermore, nitrogen oxides contained in COG and unsaturated hydrocarbons such as butadiene / cyclopentagen undergo a polymerization reaction to produce a polymeric gum-like substance (also called NO-Gum). There is a possibility that problems may occur in the gas turbine nozzle. In order to solve these problems, a large-scale COG pretreatment facility (a device for removing ammonia and hydrogen cyanide and adding hydrogen) is required. In addition, since COG contains a large amount of hydrogen sulfide (H2S), a desulfurization device may be required to reduce the concentration of sulfur dioxide in the exhaust gas after combustion. In this way, the equipment cost is significantly increased and the maintenance load is further increased.

On the other hand, when NG is mixed, since general NG does not contain hydrogen, the fuel gas has to be made higher in calorie in order to maintain combustion stability than in the case where COG is mixed. As a result, the so-called thermal NO is increased during combustion. Moreover, most of the combustible components contained in NG are hydrocarbons mainly composed of methane, and there is a possibility that the composition of the low calorific gas is greatly changed by mixing with the low calorific gas. Moreover, natural gas is a high-calorie gas (approximately 40 MJ / m ³ N), the low calorie by-product gas calorific (about 12 MJ / m ³ N or less) there is a large difference. For this reason, since the heat increase effect of NG is remarkable, the mixing ratio between the low calorie by-product gas and the natural gas at the time of heat increase must be reduced, and as a result, the uniform gas mixing property due to the heat increase can be obtained. It becomes difficult to secure. If the non-uniformity deviation is large, the effect appears during combustion in the gas turbine, resulting in non-uniform combustion temperatures. When this non-uniformity is serious, the gas turbine combustor and the turbine section are damaged.
JP 2002-155762 A JP 9-317499 A

  In order to stably burn low calorie gas such as BFG as a fuel gas, the inventors of the present invention ensure stable combustion by mixing high calorie gas with low calorie gas and increasing the calorific value of this mixed gas. We focused on the fact that it is not a unique method, but it is effective to increase the hydrogen content in the low calorie gas to the level necessary for stable combustion at the same time. This is because hydrogen gas has a good ignition flame holding property and can effectively use this property.

In addition, the present inventors have reduced the amount of low calorie gas supplied to the combustion device, for example, when it is necessary to reduce the output of a gas turbine that is a kind of combustion device, and include partial load operation of the gas turbine. When stable operation becomes difficult, low to medium calorie gas (gas with a calorific value of about 20 MJ / m ³ N) is generated by gas reforming equipment and mixed with low calorie gas to increase low calorie gas. We paid attention to the fact that it was possible to heat and continue the operation of the gas turbine. This is because when high calorie gas such as natural gas is used to increase the heat of low calorie gas, the mixing ratio of high calorie gas to low calorie gas is small, so it is difficult to ensure uniform gas mixing, but low to medium In the case of calorie gas, the mixing ratio can be increased, the difference in calorie between the two gases to be mixed is small, and it is easy to ensure uniform gas mixing, and the amount of hydrogen gas with good ignition flame holding property Also increases after mixing.

  The present invention has been made based on such circumstances, and when low calorie gas is used as the fuel gas of a gas turbine, the reformed gas is added thereto to reform the low calorie gas, and gas reforming for realizing combustion stability. The purpose is to provide facilities.

For the above purpose, the gas reforming equipment of the present invention comprises:
A reaction cylinder having a natural gas supply line and an air supply line, for mixing a natural gas and air, and chemically reforming the mixed gas to reform to produce a reformed gas containing hydrogen gas. Having a reformed gas production apparatus;
A mixing adjustment device for mixing the low calorie gas and the reformed gas supplied from the reformed gas production device and supplying the mixture to the gas turbine equipment as a fuel gas;
A reformed gas supply passage for supplying the reformed gas from the reformed gas manufacturing apparatus to the mixing and adjusting apparatus;
A fuel gas supply passage for supplying fuel gas from the mixing adjusting device to the gas turbine equipment;
And a control device for controlling the operation of the reformed gas production device and the mixing adjusting device.

  Low-calorie gas is generated from blast furnace gas (BFG), by-product gas generated by direct reduction ironmaking and smelting reduction ironmaking, tail gas generated in GTL (Gas to Liquids) process, and oil sand, which is generated along with oil refining process By-product gas, gas generated by incineration of dust using plasma, and low-calorie gas such as by-product gas generated by thermochemical reaction of the raw material by other high heat. Natural gas also includes liquefied natural gas.

  The reformed gas production apparatus further includes a process steam supply line, and the reformed gas obtained by reforming by adding a process steam to a mixed gas of natural gas and air to cause a chemical reaction is provided above. It is preferable that it is configured so that it can be supplied to the mixing adjusting device. This is because the hydrogen concentration of the reformed gas is further increased by mixing the process steam.

A fuel gas hydrogen concentration detector is further provided in at least the fuel gas supply passage of the reformed gas supply passage and the fuel gas supply passage,
It is preferable that the control device is configured to adjust the amount of reformed gas supplied from the reformed gas production device to the mixing adjusting device based on detection information of the hydrogen concentration detector.

A fuel gas hydrogen concentration detector is further provided in at least the fuel gas supply passage of the reformed gas supply passage and the fuel gas supply passage,
The control device is configured to change the hydrogen concentration of the reformed gas by changing the mixing ratio of natural gas and air in the reformed gas production device based on the detection information of the hydrogen concentration detector. preferable.

The reformed gas production apparatus includes a process steam supply line, and further includes a fuel gas hydrogen concentration detector disposed in at least the fuel gas supply path of the reformed gas supply path and the fuel gas supply path. Prepared,
The control device changes the hydrogen concentration of the reformed gas by changing the mixing ratio of natural gas, air, and process steam in the reformed gas production device based on the detection information of the hydrogen concentration detector. It is preferable to configure. This is because the adjustment range of the hydrogen concentration of the reformed gas is expanded by mixing the process steam.

A hydrogen concentration detector for a fuel gas disposed in at least the fuel gas supply passage of the reformed gas supply passage and the fuel gas supply passage;
A dilution gas supply device for diluting the fuel gas with the dilution gas, disposed in the mixing adjustment device;
Preferably, the control device is configured to mix the diluent gas from the diluent gas supply device with respect to the fuel gas based on the detection information of the hydrogen concentration detector.

A fuel gas hydrogen concentration detector disposed in at least the fuel gas supply passage of the reformed gas supply passage and the fuel gas supply passage;
Preferably, the controller is configured to change the calorific value of the reformed gas by changing the mixing ratio of natural gas and air in the reformed gas production device based on the detection information of the hydrogen concentration detector. .

The reformed gas production apparatus includes a process steam supply line, and further includes a fuel gas hydrogen concentration detector disposed in at least the fuel gas supply path of the reformed gas supply path and the fuel gas supply path. Prepared,
The control device changes the heat generation amount of the reformed gas by changing the mixing ratio of natural gas, air, and process steam in the reformed gas production device based on the detection information of the hydrogen concentration detector. It is preferable to configure.

A fuel gas calorific value measurement means disposed in at least the fuel gas supply passage of the reformed gas supply passage and the fuel gas supply passage;
It is preferable that the control device is configured to adjust the amount of reformed gas supplied from the reformed gas production device to the mixing adjusting device based on the detection information of the calorific value measuring means.

A fuel gas calorific value measurement means disposed in at least the fuel gas supply passage of the reformed gas supply passage and the fuel gas supply passage;
Preferably, the controller is configured to change the calorific value of the reformed gas by changing the mixing ratio of natural gas and air in the reformed gas production device based on the detection information of the calorific value measuring means. .

The reformed gas production apparatus includes a process steam supply line, and further includes a fuel gas calorific value measuring means disposed in at least the fuel gas supply passage of the reformed gas supply passage and the fuel gas supply passage. Prepared,
The control device changes the calorific value of the reformed gas by changing the mixing ratio of natural gas, air, and process steam in the reformed gas production device based on the detection information of the calorific value measuring means. It is preferable to configure.

Pressure measuring means for measuring the internal pressure of the passage disposed in the fuel gas supply passage,
It is preferable that the control device is configured to adjust the amount of the reformed gas supplied from the reformed gas production device to the mixing adjusting device based on the measurement information of the pressure measuring means.

A fuel gas calorific value measuring means disposed in at least the fuel gas supply passage of the reformed gas supply passage and the fuel gas supply passage;
A dilution gas supply device for diluting the fuel gas with the dilution gas, disposed in the mixing adjustment device;
Preferably, the control device is configured to mix the dilution gas from the dilution gas supply device to the fuel gas based on the detection information of the calorific value measurement means.

  The reformed gas manufacturing apparatus preferably further includes a heating steam supply line for supplying heating steam from the gas turbine equipment in order to promote a chemical reaction in the reaction cylinder.

  In addition to the heating steam supply line, the reformed gas production apparatus takes out high-temperature compressed air from the gas turbine equipment and supplies it to the reaction cylinder for heating to promote a chemical reaction in the reaction cylinder. It is preferable that it is further comprised, and it is comprised so that a vapor | steam and high temperature extraction can be selectively supplied. This is because at the time of starting the chemical reaction in the reaction cylinder, a heat source necessary for accelerating the reaction can be obtained because it is a transient state in which no steam is generated in the equipment.

  The reformed gas production apparatus has a heat exchanging means in its reformed gas supply passage, and the heat exchanging means supplies the mixed gas of natural gas and air supplied to the reaction cylinder and the mixing adjusting apparatus. It is preferable that the heat exchange with the reformed gas is performed. This is because the reformed gas having a high temperature can be cooled to an appropriate temperature, and the mixed gas can be preheated prior to the reaction.

  It is preferable that the reformed gas supply passage has a cooling means for cooling the reformed gas supplied to the mixing adjusting device.

  It is preferable that the cooling means is disposed downstream of the heat exchange means in the reformed gas supply passage, and is configured to condense and remove the liquid component in the reformed gas.

  A buffer tank is disposed in the reformed gas supply passage, and the buffer tank absorbs fluctuations in the reformed gas flow rate so that the pressure of the reformed gas supplied to the mixing and adjusting device is stabilized. Preferably, it is configured. This is because the reforming gas can be uniformly mixed with the low calorie gas in the mixing adjusting device.

  According to the present invention, NG containing almost no impurities can be reformed to reveal hydrogen gas, and a clean reformed gas containing this hydrogen gas can be used as a reformed gas for low calorie gas such as BFG. As a result, the low calorie gas can be reformed as a stable fuel, for example, by stabilizing the hydrogen gas content of the low calorie gas.

  In addition, even when the supply amount of low calorie gas decreases, the operation of the facility can be operated by increasing the low calorie gas with a reformed gas containing hydrogen gas that has good miscibility with low calorie gas and good ignition stability. It can continue stably.

  Embodiments of the gas reforming equipment of the present invention will be described with reference to the accompanying drawings.

  FIG. 1 is a block diagram showing an outline of a gas reforming equipment (hereinafter simply referred to as equipment) according to an embodiment of the present invention. This facility includes a fuel gas supply pipe 2 for supplying fuel gas mainly composed of low calorie gas (hereinafter represented by BFG in the present embodiment and the like) to the gas turbine power generation facility 1, and reformed gas production for producing reformed gas. Arranged at the junction of the equipment 3, the reformed gas supply pipe 4 for joining the reformed gas from the reformed gas production equipment 3 to the fuel gas supply pipe 2, and the fuel gas supply pipe 2 and the reformed gas supply pipe 4 And a mixing adjusting device 5 for adjusting the fuel gas by mixing the BFG and the reformed gas. The gas turbine power generation facility 1 is provided with an incidental facility 6 that effectively uses exhaust heat. Connected to the reformed gas production facility 3 are NG supply pipe 7, air supply pipe 8 and process steam pipe 91 for supplying NG, air and process steam (hereinafter referred to as steam) as raw materials for the reformed gas. Furthermore, the reformed gas production facility 3 is connected with a heating steam supply pipe 9 and a gas turbine bleed air pipe (hereinafter simply referred to as bleed pipe) 92 for heating to cause partial oxidation reaction of NG. Further, the equipment 1 is provided with a control device 10 for controlling the production of the reformed gas, the supply of the reformed gas, and the mixing adjustment of the BFG and the reformed gas.

  In the reformed gas production facility 3, NG is mixed with air and partially oxidized, and methane gas (CH4) in NG is decomposed to produce hydrogen gas (H2), carbon monoxide (CO), carbon dioxide (CO2), and moisture. Reveal (H2O). The liquefied water is discharged as drain, but all others are mixed into the BFG as reformed gas. Thus, since only NG is decomposed and pure water hydrogen is not taken out, pretreatment facilities such as desulfurization, tar removal, and naphthalene removal are unnecessary. Further, CH4, H2, and CO are obtained as combustible components. It is possible to adjust the ratio of these combustible components by changing the mixing ratio of NG and air. Therefore, it is possible to adapt to the component of low calorie gas selected as fuel gas.

  The piping equipment is slightly different depending on whether the NG to be used is a low pressure or a high pressure, but FIG. 1 shows both of them together. For example, the reformed gas supply pipe 4 differs depending on whether NG is low pressure or high pressure, but in FIG. 1, the low pressure reformed gas supply pipe 4a and the high pressure reformed gas supply pipe 4b are shown together. The low-pressure NG refers to a case where the NG supplied to the reformed gas production facility 3 is a pressure lower than the pressure required for the fuel supplied to the gas turbine. On the contrary, the high-pressure NG means NG having a pressure higher than the pressure required for the fuel supplied to the gas turbine, and is, for example, a state in which liquefied natural gas is vaporized in a closed place.

  The pressure of the reformed gas obtained using the low-pressure NG is also low. In this case, the low-pressure reformed gas is sent to the mixing adjusting device 5 through the low-pressure reformed gas supply pipe 4a, where it is mixed with BFG. The mixing adjusting device 5 adjusts the amount of the reformed gas supplied from the reformed gas supply pipe 4a to the BFG so that the hydrogen gas content in the fuel gas falls within a predetermined range and requires a dilution gas. Supply accordingly. The gas turbine power generation facility 1 generates power by operating the gas turbine using the modified mixed BFG as fuel. As will be described later, the incidental facility 6 is provided with an exhaust heat recovery boiler 41 and a steam turbine 42 that use exhaust heat from the gas turbine 36.

  When high pressure NG is used, the air supply pipe 8 is also used for high pressure, as will be described later, and therefore differs from the case where low pressure NG is used. In addition, the pressure of the reformed gas obtained by using the high pressure NG is high. The high-pressure reformed gas is not sent to the mixing adjusting device 5 but directly sent to the fuel gas supply pipe 2 in the gas turbine power generation facility 1 through the high-pressure reformed gas supply pipe 4b, where it is mixed with BFG.

  Each of the facilities 2, 3, 5, 6 will be described with reference to FIGS. 2 to 3. First, the case of using the low pressure NG will be described, and then the difference in the case of using the high pressure NG will be described. To do.

(Configuration of low pressure reformed gas production facility 3)
FIG. 2 shows a conceptual diagram of equipment piping constituting the reformed gas production facility 3. In an actual machine, the quantity of each device, the piping order, etc. may be changed. In addition, it is not limited to spare equipment, spare systems, maintenance devices, monitoring devices, high functionality, high accuracy, stabilization, simplification, etc. The details may be changed.

  The reformed gas production facility 3 includes a first mixer 11 for mixing NG and air, a reaction cylinder 12 for partial oxidation by heating the mixed gas, and a reaction with the mixed gas sent to the reaction cylinder 12. A heat exchanger 13 is provided for exchanging heat with a gas heated to high temperature. In order to heat the reaction cylinder 12 to a temperature necessary for the chemical reaction of the mixed gas, steam is supplied from the heating steam supply pipe 9 connected to the reaction cylinder 12, or a gas turbine air compressor 38a (FIG. 4). The high-temperature compressed air extracted from the extraction pipe 92 connected to the reaction cylinder 12 is supplied through the flow control valve 103. A thermometer 89 is installed in the extraction pipe 92. Water vapor from the heating steam supply pipe 9 is used when high-temperature compressed air from the gas turbine air compressor 38a is not available. Moreover, water vapor and high-temperature compressed air are supplied only when the reaction cylinder 12 is started, and the reaction is continued by the reaction heat of the mixed gas itself after the reaction starts.

  Various measuring devices and flow control valves (hereinafter referred to as flow control valves) are installed in each pipe of the reformed gas production facility 3. These will be described along the flow of fluid.

  First, NG supplied through the NG supply pipe 7 passes through the flow control valve 51 and then reaches the mist separator 14 to remove the liquid component. A pressure gauge 61 and a flow meter 71 are installed in the pipe 7 leading to the first mixer 11 of the reformed gas production facility 3. A pressure gauge 63 is also installed in the first mixer 11.

  The air supplied through the air supply pipe 8 is dust-removed by the filter 15 and is then pumped to the first mixer 11 by the booster fan 16 through the flow control valves 52a and 52b. In the first mixer 11, the air is mixed with NG. A pressure gauge 62 and a flow meter 72 are installed downstream of the flow control valve 52 a in the air supply pipe 8. The air supply pipe 8 is provided with a bypass pipe 16 a that bypasses the booster fan 16. A flow control valve 53 is installed in the bypass pipe 16a. The bypass pipe 16a is for ensuring a minimum flow rate at which the booster fan 16 can be continuously operated.

  On the other hand, the water vapor supplied through the process steam pipe 91 is supplied to the third mixer 94 after passing through the flow control valve 93 and mixed with the mixed gas of NG and air. Reference numeral 76 is a flow meter.

  In the reformed gas production facility 3, a mixed gas obtained by mixing air and NG by the first mixer 11 is heated by the heat exchanger 13 and then sent to the reaction cylinder 12. Thermometers 81 and 82 are respectively installed in the mixed gas supply pipes 17 on the upstream side and the downstream side of the heat exchanger 13. Thermometers 83 and 84 are also installed in the reaction cylinder 12 and the heating steam supply pipe 9, respectively. In the reaction cylinder 12, NG is partially oxidized and its contained CH4 is decomposed into H2, CO, CO2, and H2O. These are sent to the reformed gas supply pipe 4 as the reformed gas without being separated. The reformed gas in the reformed gas supply pipe 4 is cooled by a mixed gas of NG and air by passing through the heat exchanger 13 described above. A pressure gauge 64 and a thermometer 85 are installed in the portion of the reformed gas supply pipe 4 between the reaction cylinder 12 and the heat exchanger 13.

  The reformed gas supply pipe 4 extends from the reformed gas production facility 3 to the second mixer 18 of the mixing adjustment device 5. A cooler 19 and a buffer tank 20 are disposed in the reformed gas supply pipe 4 after leaving the reformed gas production facility 3. The buffer tank 20 is for absorbing fluctuations in the reformed gas flow rate. The reformed gas is cooled by the cooler 19 and the condensed liquid is discharged as drain. Thereafter, the reformed gas is sent to the second mixer 18 while the flow rate is adjusted by the flow control valve 54 while the buffer tank 20 is filled with a predetermined amount. The flow rate of the reformed gas whose flow rate has been adjusted by the flow control valve 54 is detected by a flow meter 73 installed downstream of the flow control valve.

  In the portion of the reformed gas supply pipe 4 between the cooler 19 and the buffer tank 20, a thermometer 86, an H2 concentration meter 21, an O2 concentration meter 22, and a CO concentration meter 23 toward the downstream of the reformed gas flow. And a CH4 densitometer 24 is installed. A pressure gauge 64 is installed in the buffer tank 20. The reformed gas supply pipe 4 is provided with a bypass pipe 25 that bypasses the buffer tank 20.

(Configuration of mixing adjustment device 5)
Next, the mixing adjustment device 5 will be described with reference to FIG. A BFG supply pipe 26 is connected to the mixing adjustment device 5. A thermometer 87, a buffer tank 27, and a pressure gauge 65 are installed in the BFG supply pipe 26. The buffer tank 27 is used to alleviate the pressure fluctuation caused by the fluctuation of the BFG flow rate.

  A CH4 concentration meter 111, a CO concentration meter 28, an H2 concentration meter 29, the second mixer 18 and the H2 dilution device 30 are installed in this order in the BFG supply pipe 26 in the mixing adjustment device 5 toward the downstream of the fluid flow. ing. However, the arrangement of the devices is an example and is not limited thereto. BFG and reformed gas (H 2, CO, CO 2, H 2 O, etc.) are mixed by the second mixer 18 to become a mixed gas (fuel gas), and the fuel compressor of the gas turbine power generation facility 1 through the fuel gas supply pipe 2. 35 (see FIG. 4).

  The H2 dilution device 30 is for mixing the N2 gas and lowering the H2 concentration when the H2 concentration in the fuel gas exceeds a predetermined range. A supply pipe 31 for supplying N2 gas as dilution gas from a nitrogen gas (N2) supply source (not shown) is connected to the H2 dilution apparatus 30. A flow control valve 55 and a flow meter 74 are installed in the N2 supply pipe 31.

  The fuel gas supply pipe 2 extending from the mixing and adjusting device 5 to the gas turbine power generation facility 1 has a dust remover 32, a CO concentration meter 112, an H2 concentration meter 33, a CH4 concentration meter 113, a pressure meter 66, and a thermometer 88 directed downstream. And a calorimeter (for example, a gas analyzer) 34 is installed.

(Configuration of gas turbine power generation facility 1)
Referring to FIG. 4, the fuel gas supply pipe 2 in the gas turbine power generation facility 1 is provided with the fuel compressor 35 driven by the motor M, and the fuel gas passes through the fuel gas supply pipe 2 by the fuel compressor 35. The gas turbine 36 is pumped to the combustor 37. A flow meter 75 and a flow control valve 56 are installed in the portion of the fuel gas supply pipe 2 between the fuel compressor 35 and the combustor 37. A generator 38 is connected to the gas turbine 36. The code | symbol 38a is an air compressor of a gas turbine. The fuel compressor 35 is provided with a bypass pipe 39. The bypass pipe 39 is for controlling the fuel gas pressure at the outlet of the compressor 38 a to a predetermined pressure, and includes a flow control valve 57 and a cooler 40.

  Ancillary facilities 6 attached to the gas turbine power generation facility 1 are an exhaust heat recovery boiler 41, a steam turbine 42 for generating electric power with the steam of the exhaust heat recovery boiler 41, and a chimney 43 for dissipating the exhaust gas. . Of course, a generator 44 is connected to the steam turbine 42. Further, a steam supply pipe 45 for supplying water vapor from the exhaust heat recovery boiler 41 to a predetermined use point UP is installed, and a flow control valve 58 is installed in the steam supply pipe 45. Steam for heating may be supplied to the reaction tube 12 through the steam supply pipe 45.

  The operation of the above gas reforming equipment is controlled by the control device 10. The control device 10 controls the mixing / adjusting device 5 to improve the characteristics of the BFG by mixing a necessary amount of reforming gas and dilution gas into the BFG, and in response to a request command from the mixing / adjusting device 5 NG and air. The reformed gas production apparatus 3 for producing a desired reformed gas from the mixed gas is controlled. It is as follows.

(Control of reformed gas production apparatus 3)
The reformed gas obtained by chemically reacting NG has a much higher hydrogen content and calorific value than BFG. Therefore, the control of the reformed gas production apparatus 3 is based on the required specifications of the reformed gas production amount and the supply amount to the mixing adjustment device 5, the hydrogen content of the reformed gas, and the reformed gas heat generation amount. One purpose is to make adjustments to meet the requirements. For this purpose, the supply amount of NG, air and steam to the reformed gas production apparatus 3 and the mixing ratio thereof are adjusted. The mixing ratio of NG and air is determined by the required hydrogen concentration in the fuel gas determined by the gas turbine used, the hydrogen concentration in the BFG measured in advance, the reformed gas production capacity of the reformed gas production apparatus 3, and the gas turbine. This is determined in advance based on the fuel consumption during full load operation. This predetermined mixing ratio (reference mixing ratio) is changed as necessary.

  The supply amount of NG and air and the mixing ratio thereof are adjusted by adjusting the opening degree of the flow control valves 51, 52a, 52b of the supply pipes 7, 8. The mixing ratio of NG and air is feedback-controlled based on the measurement information from the flow meters 71 and 72 of the supply pipes 7 and 8 so that the above-described reference mixing ratio is obtained. The adjustment of the production amount of the reformed gas and the supply amount to the mixing adjusting device 5 is performed so that the internal pressure of the first mixer 11 or the internal pressure of the buffer tank 20 on the reformed gas supply pipe 4 falls within a predetermined range. The flow control valve 51 controls the NG flow rate. Since the mixing ratio is determined in advance, when the NG flow rate (measured by the flow meter 71) is determined by the flow control valve 51, the opening degree of the flow control valve 52a of the air supply pipe 8 is automatically determined and the flow control valve 52b. To adjust the air flow rate (measured by the flow meter 72). One flow control valve 52a is a fixed opening valve that automatically determines the opening according to the mixing ratio of NG and air. The other flow control valve 52b operates as an automatic control valve that adjusts the mixing ratio correctly. The flow rate ratio of these flow control valves 52a and 52b can be set arbitrarily.

  As shown in FIG. 5, the calorific value of the reformed gas is maximum when the volume ratio of air mixed with NG (assuming CH4 is 100) is 0, and decreases as the ratio increases. On the other hand, as shown in FIG. 6, the hydrogen concentration in the reformed gas is 0 when the volume ratio of air is 0, increases around 20 to 35 (%), and then decreases as the air ratio increases. To go. In addition, FIG. 5 is a graph which shows the emitted-heat amount of the said mixed gas with respect to the mixing ratio of the air with respect to NG assumed that the component is only CH4. FIG. 6 is a graph showing the volume ratio of the main combustion component of the reformed gas after production to the mixing ratio of air to NG assuming that the component is only CH4.

  Steam has the effect of increasing the hydrogen concentration in the reformed gas when the mixing ratio of NG and air is the same, and therefore a reformed gas with a higher hydrogen concentration due to the same mixing ratio of NG and air is required. To be supplied. Since the calorific value also changes due to the change in the hydrogen concentration, the water vapor concentration may be adjusted for the purpose of adjusting the calorific value.

  In the production of reformed gas, the oxygen concentration in the reformed gas is controlled to be a predetermined value (for example, 1% by volume) or less for safety reasons. For this purpose, based on the detection result of the O2 concentration meter 22, feedback control is performed by the flow control valve 52b in the direction of decreasing the air mixing ratio. Further, in order to adjust the calorific value of the fuel gas, the control device 10 detects the reformed gas from the detection information by the H2 concentration meter 21, the CO concentration meter 23, the CH4 concentration meter 24, the pressure gauge 64, and the thermometer 86. Calculate the calorific value. This is because the combustible components of the reformed gas using NG are mainly H 2 gas, CO gas, and CH 4 gas. Based on the calculated heat generation amount, adjustment is made by changing the air mixing ratio using the flow control valve 52b so as to obtain a predetermined heat generation amount. The reason why the detected temperature and the detected pressure are also used for calculating the calorific value is to perform water vapor partial pressure correction.

(Control of mixing adjusting device 5)
The control of the mixing adjusting device 5 is performed by adjusting the amount of reformed gas mixed in the BFG to be supplied to the gas turbine 36, by issuing a hydrogen concentration change command to the reformed gas manufacturing device 3, and The object is to adjust the hydrogen concentration of the mixed gas (fuel gas) to the required value by mixing the dilution gas with BFG. It is also possible to adjust the calorific value of the fuel gas by issuing a command for changing the calorific value of the reformed gas to the reformed gas production apparatus 3. Since the amount of fuel gas consumed by the gas turbine 36 varies in accordance with the load of the gas turbine, the amounts and mixing ratios of BFG, reformed gas and dilution gas are adjusted in conjunction with operation control of the gas turbine 36.

  First, control of the hydrogen content in the fuel gas will be described. Since hydrogen gas has a high combustion rate and good ignition flame holding properties, it contributes to maintaining stable combustion of BFG, which is low in calories. Therefore, the control device 10 controls the hydrogen concentration in the fuel gas to be maintained at a predetermined value (for example, 4% by volume) with respect to the low calorie gas having a low hydrogen content. In the case of a gas turbine, if the hydrogen content of BFG is 2% by volume or less, misfire is likely to occur. Note that the planned mixture ratio and maximum mixture ratio of BFG and reformed gas in hydrogen concentration control can be arbitrarily set by manual input. The planned mixture ratio and the maximum mixture ratio will be described later.

  If the hydrogen concentration falls below a predetermined value also by adjusting (increasing) the supply amount of the reformed gas, the control device 10 issues an alarm (low-alarm) and supplies hydrogen to the reformed gas production device 3. Issue a concentration increase command. In the reformed gas production apparatus 3 that has received this command, the hydrogen concentration in the reformed gas is increased by changing the air mixing ratio to NG. The hydrogen concentration in the reformed gas is maximized when the mixing ratio of NG and air is about 30% by volume. Therefore, even when the mixing ratio needs to increase the hydrogen concentration in the reformed gas, NG and air The water vapor is mixed while the mixing ratio is fixed. Since the calorific value increases as the hydrogen concentration increases, the calorific value can be controlled by changing the mixing ratio of the water vapor. The maximum value of the mixing amount of water vapor is set to a saturation pressure or less under the concentration condition of the third mixer 94.

  If the hydrogen concentration falls below a predetermined value even by increasing the hydrogen concentration of the reformed gas to the maximum, the control device 10 issues an alarm (low-low alarm) and switches from hydrogen concentration control to heat generation amount control. That is, a command for increasing the calorific value of the reformed gas is issued to the reformed gas production apparatus 3. In the reformed gas manufacturing apparatus 3 that has received this command, the heat generation amount of the reformed gas is increased by changing the air mixing ratio to NG. Specifically, the heat generation amount of the reformed gas is increased by reducing the air mixing ratio to NG.

  On the other hand, if the hydrogen concentration exceeds a predetermined value also by adjusting (decreasing) the supply amount of the reformed gas, the control device 10 issues an alarm (high-alarm) and also notifies the reformed gas production device 3. Issue a hydrogen concentration reduction command. In the reformed gas production apparatus 3 that has received this command, the hydrogen concentration in the reformed gas is lowered by changing the air mixing ratio to NG.

  Further, if the hydrogen concentration exceeds the predetermined value by reducing the hydrogen concentration of the reformed gas to the minimum, the control device 10 issues an alarm (high-high-alarm) and the hydrogen concentration becomes the predetermined value. The flow control valve 55 of the N2 supply pipe 31 is adjusted to set the required flow rate (detected by the flow meter 74) of the dilution gas supplied to the dilution device 30. N2 is usually used as the dilution gas, but is not limited thereto.

  The above control is control for keeping the hydrogen concentration in the BFG as the fuel gas at a predetermined value, but there is also a low-calorie by-product gas that is originally sufficiently and stable (5% by volume or more). Even with such a low-calorie by-product gas, the calorific value (gas calorie) may change under the influence of changes in the operating conditions of the operation process of the main product. Corresponding to such caloric fluctuation of low calorie gas, it is also possible to perform control (heating value control) for maintaining the operation by stabilizing the heating value of the fuel gas.

  That is, the flow meters 73, 74, and 75 installed in the reformed gas supply pipe 4 and the fuel gas supply pipe 2, the H 2 concentration meter 29, the CO concentration meter 28, and the CH 4 concentration meter 111 installed in the fuel gas supply pipe 2. The calorific value of BFG is calculated based on the detection results of the pressure gauge 65 and the thermometer 87, and the flow meter 73, H2 concentration meter 21, CO concentration meter 23, CH4 installed in the reformed gas supply pipe 4 are calculated. The calorific value of the reformed gas is calculated based on the detection results of the concentration meter 24, the pressure gauge 64, and the thermometer 86. When the total calorific value is lower than the calorific value necessary for the operation of the gas turbine 36, the high-calorie reformed gas having a higher middle to low calorie is supplied from the reformed gas supply pipe 4 and the fuel gas. It is the control which raises to the required calorific value. The supply amount of the reformed gas is controlled by the flow control valve 54. The reason why the detected temperature and the detected pressure are also used for calculating the calorific value is to perform water vapor partial pressure correction.

  The reason why the concentration meters 21, 23, 24, 28, 29, and 111 of the component gases are used for concentration detection for calorific value calculation is that they are suitable for process control because of their high detection speed. On the other hand, the calorimeter 34, which has a low detection speed but can accurately measure gas components, is used to monitor changes in the properties of fuel gas. Therefore, the combustible component of the fuel gas after mixing the BFG and the reformed gas can be measured by the calorimeter 34 and fed back to the control device 10 for adjustment.

  Further, in order to increase the detection speed of the calorie value (combustible component concentration) of the fuel gas and to provide quick response, the CO concentration meter 112, the H2 concentration meter 33, and the CH4 concentration installed in the fuel gas supply pipe 2 are used. It is only necessary to detect the concentration of the combustible component using the meter 113 and correct the moisture from the pressure and temperature measured by the pressure gauge 66 and the thermometer 88 and calculate. When the calorific value of the fuel gas after mixing exceeds the upper limit of the allowable calorie fluctuation range of the gas turbine, the calorific value is reduced by supplying N2 gas through the N2 supply pipe 31.

  The planned mixture ratio, minimum mixture ratio, and maximum mixture ratio of BFG and reformed gas in this calorific value control can be arbitrarily set by manual input. This is because the composition of the BFG generated for each blast furnace is different, and the composition of the reformed gas to be linked to the inevitably has to be different. Further, as described above, low calorie by-product gas includes hydrogen gas containing 5% by volume or more, but there is also a low hydrogen concentration such as BFG. In such a gas, it is desirable to maintain the above-described predetermined hydrogen concentration even during the calorific value control. This is because hydrogen gas has a good ignition flame holding property and is a gas component necessary for ensuring stable combustion.

  The planned mixture ratio described above is a mixture ratio of reformed gas having a predetermined hydrogen concentration with respect to BFG having a certain hydrogen concentration, and is a ratio obtained in advance by calculation at the design stage. If this planned mixture ratio is obtained in advance, the control responsiveness is improved with respect to the change in the hydrogen concentration of BFG. And fine adjustment is made by feedback control based on the detection result of the H2 concentration meter 33 of the fuel gas supply pipe 2. The maximum mixing ratio is an upper limit value of the mixing ratio set in order to prevent excessive reforming gas mixing due to an erroneous signal from the instrument. Similarly, the minimum mixing ratio is a lower limit value of the mixing ratio that is set in order to prevent insufficient reformed gas mixture (insufficient calorific value) due to an erroneous signal of the instrument.

  Hereinafter, specific heat generation amount control will be described. When the calorific value of the fuel gas falls below a predetermined range during normal operation, the control device 10 opens the flow control valve 54 of the reformed gas supply pipe 4 so that the calorific value of the fuel gas becomes a predetermined value. The flow rate of the reformed gas supplied to the second mixer 18 at an increased degree (detected by the flow meter 73) is increased.

  If the calorific value of the fuel gas still falls below the set value even when the flow rate of the reformed gas is increased, the control device 10 issues an alarm (low-alarm) and instructs the reformed gas manufacturing device 3 to increase the calorific value. To emit. In the reformed gas manufacturing apparatus 3 that has received this command, the heat generation amount of the reformed gas is increased by changing the air mixing ratio to NG. The adjustment amount of the air mixing ratio to NG is determined in accordance with the tendency of the graph of FIG. If necessary, the heat generation amount of the reformed gas is increased by changing the mixing ratio of water vapor.

  If the calorific value of the fuel gas still falls below a predetermined value even by increasing the calorific value of the reformed gas to the maximum, the control device 10 issues an alarm (low-low alarm). In response to this, the operator takes appropriate measures.

  On the other hand, if the calorific value exceeds a predetermined upper limit value by adjusting (decreasing) the supply amount of the reformed gas, the control device 10 issues an alarm (high-alarm) and informs the reformed gas production device 3. In response, a heat generation amount reduction command is issued. In the reformed gas production apparatus 3 that has received this command, the heat generation amount of the reformed gas is reduced by changing the air mixing ratio to NG.

  Further, if the calorific value of the fuel gas still exceeds the predetermined high upper limit value by reducing the calorific value of the reformed gas to the minimum, the control device 10 issues an alarm (high-high-alarm) and the calorific value. Is adjusted to the flow control valve 55 of the N2 supply pipe 31 so that the required flow rate of the dilution gas supplied to the dilution device 30 (detected by the flow meter 74) is set.

  Note that it is desirable to consider the time delay required for mixing when changing the mixing ratio of NG and air during hydrogen concentration control and calorific value control.

  The fuel gas calorific value control described above is control for directly increasing or decreasing the calorific value by supplying reformed gas or N2 gas while detecting the calorific value of the fuel gas.

  Next, with reference to FIGS. 7 to 9 as well, differences in facilities when using high pressure NG instead of the low pressure NG described above will be mainly described.

  When high pressure NG is used, the air supplied together needs to be at a high pressure, but two types of high pressure air supply pipes 8 will be described below with reference to FIGS. In FIG. 7, the piping in the range indicated by the two-dot chain line is used for high pressure instead of the portion A surrounded by the two-dot chain line in the low-pressure air supply pipe 8 in FIG.

  High-temperature high-pressure air extracted through an extraction pipe 92 connected to an air compressor 38a in a gas turbine described later is guided to the air supply pipe 8 shown in FIG. A booster compressor 95 is disposed downstream of the flow control valves 52a and 52b in the air supply pipe 8. A bypass pipe 96 that bypasses the pressurizing compressor 95 is connected to the air supply pipe 8, and a flow control valve 98 for preventing surging of the air cooler 97 and the pressurizing compressor 95 is connected to the bypass pipe 96. Are arranged. In this way, high-temperature and high-pressure air from the air compressor 38a in the gas turbine can be used.

  Low-pressure air is supplied to the air supply pipe 8 shown in FIG. 8 in the same manner as the low-pressure air supply pipe 8 in FIG. However, the high-pressure air supply pipe 8 is provided with a high-pressure air compressor 99 instead of the booster fan 16 in the low-pressure air supply pipe 8 in FIG. The air supply pipe 8 is connected to a bypass pipe 100 that bypasses the air compressor 99, and the bypass pipe 100 has a flow control valve 103 for preventing the air cooler 101 and the air compressor 99 from surging. Are arranged.

  FIG. 9 shows a piping facility of the gas turbine power generation facility 1 using a high pressure reformed gas produced from high pressure NG, which is a piping using the low pressure reformed gas shown in FIGS. 3 and 4. It corresponds to. Here, the mixing adjusting device 5 for adjusting the mixing of BFG and reformed gas as shown in FIG. 3 is not arranged in a collective form. Specifically, as shown in the drawing, the pressure gauge 65, the CO concentration meter 28, and the H2 concentration meter 29 in the mixing adjusting device 5 described above are installed on the upstream side of the fuel compressor 35, and the reformed gas and A fourth mixer 104 for mixing BFG and an N2 supply pipe 31 in which the flow control valve 55, the flow meter 74 and the H2 dilution device 30 are installed are installed on the downstream side of the fuel compressor 35. In this way, the components of the mixing adjustment device 5 are installed separately on the upstream side and the downstream side of the fuel compressor 35. This is because the reformed gas mixed into the BFG is high pressure and does not need to be boosted by the fuel compressor 35, so the reformed gas supply pipe 4 is connected to the downstream side of the fuel compressor 35. In addition, an extraction pipe 92 is connected to the air compressor 38 a in the gas turbine 36. High-temperature and high-pressure air is sent from the air compressor 38a through the extraction pipe 92 to the air supply pipe 8 to the reformed gas production apparatus 3 described above. The above points are different from the piping using the low-pressure reformed gas shown in FIGS.

  According to the present invention, a clean reformed gas containing hydrogen gas can be used by decomposing NG containing almost no impurities, so that the gas turbine can be continuously operated without requiring a reformed gas pretreatment facility. Stable combustion can be realized.

It is a block diagram showing the outline of the gas reforming equipment which is one embodiment of the present invention. It is a block diagram which shows an example of the reformed gas manufacturing apparatus in the installation of FIG. It is a block diagram which shows an example of the supply line of the fuel gas supplied to the gas turbine power generation equipment in the installation of FIG. It is a block diagram which shows an example of the gas turbine power generation equipment in the installation of FIG. It is a graph which shows the emitted-heat amount of the said mixed gas with respect to the mixing ratio of the air with respect to NG assumed that the component is only CH4. It is a graph which shows the volume ratio of the main combustion component of the said gas after a reforming process with respect to the mixing ratio of the air with respect to NG assumed that the component is only CH4. It is a block diagram which shows the other example of the A section in the reformed gas manufacturing apparatus of FIG. It is a block diagram which shows the further another example of the A section in the reformed gas manufacturing apparatus of FIG. It is a block diagram which shows the other Example of the gas turbine power generation equipment in the installation of FIG. 1, and the supply line of the fuel gas supplied to this power generation equipment.

Explanation of symbols

1. Gas turbine power generation equipment
2 ... Fuel gas supply piping
3. Reformed gas production equipment
4 ... Reformed gas supply piping
5 .... Mixing adjustment device
6 .. Attached facilities
7. NG supply piping
8. Air supply piping
9 ... Steam supply piping for heating
10 .... Control device
11 .... First mixer
12 .... Catalyst reaction tube
13. Heat exchanger
14 ... Mist separator
15 ... Filter
16 .... Pressure booster
16a ... Bypass piping
17 .... Mixed gas supply piping
18 ... Second mixer
19 .... Cooler
20 ... Buffer tank
21 ... H2 densitometer
22 ... O2 concentration meter
23 ... CO concentration meter
24 ... CH4 densitometer
25 .... Bypass piping
26 ... BFG supply piping
27 ... Buffer tank
28 ... CO concentration meter
29 ... H2 densitometer
30 ... Dilution device
31 ... N2 supply piping
32 ... Dust remover
33 ... H2 densitometer
34 ··· Calorimeter (gas analyzer)
35 ... Fuel compressor
36 ... Gas turbine
37... Combustor
38 .... Generator
39 ... Bypass piping
40 .... Cooler
41 .... Waste heat recovery boiler
42 ... Steam turbine
43 ... Chimney
44 .... Generator
45 ... Steam supply pipe
51-58 ... Flow control valve
61-66 ... Pressure gauge
71-76 ... Flow meter
81-89 ... Thermometer
91 ... Process steam piping
92 ... Extraction piping
93 ... Flow control valve
94 ··· Third mixer
95... Boost compressor
96 .... Bypass piping
97 ··· Air cooler
98 ... Flow control valve
99 ・ ・ ・ ・ Air compressor
100 ... Bypass piping
101 ... Air cooler 102, 103 ... Flow control valve
104 ··· Fourth mixer
111 ・ ・ ・ ・ CH4 densitometer
112 ... CO concentration meter
113 ... CH4 densitometer
AIR ... Air
BFG ... Blast furnace gas
NG ... Natural gas
U ... Use point

Claims (19)

A reaction cylinder having a natural gas supply line and an air supply line, for mixing a natural gas and air, and chemically reforming the mixed gas to reform to produce a reformed gas containing hydrogen gas. Having a reformed gas production apparatus;
A mixing adjustment device for mixing low-calorie gas and the reformed gas supplied from the reformed gas production device and supplying the mixture to the gas turbine equipment as a fuel gas;
A reformed gas supply passage for supplying the reformed gas from the reformed gas manufacturing apparatus to the mixing and adjusting apparatus;
A fuel gas supply passage for supplying fuel gas from the mixing adjusting device to the gas turbine equipment;
A gas reforming facility comprising a control device for controlling the operation of the reformed gas production device and the mixing adjusting device.   The reformed gas manufacturing apparatus further includes a process steam supply line, and the reformed gas obtained by reforming by adding a process steam to a mixed gas of natural gas and air to cause a chemical reaction is mixed and adjusted as described above. The gas reforming equipment according to claim 1, wherein the gas reforming equipment is configured to be supplied to the apparatus. A fuel gas hydrogen concentration detector disposed at least in the fuel gas supply passage of the reformed gas supply passage and the fuel gas supply passage;
The gas according to claim 1, wherein the control device is configured to adjust the amount of reformed gas supplied from the reformed gas production device to the mixing adjusting device based on detection information of the hydrogen concentration detector. Reforming equipment. A fuel gas hydrogen concentration detector disposed at least in the fuel gas supply passage of the reformed gas supply passage and the fuel gas supply passage;
The control device is configured to change the hydrogen concentration of the reformed gas by changing the mixing ratio of natural gas and air in the reformed gas production device based on the detection information of the hydrogen concentration detector. The gas reforming facility according to claim 1. A fuel gas hydrogen concentration detector disposed at least in the fuel gas supply passage of the reformed gas supply passage and the fuel gas supply passage;
The control device changes the hydrogen concentration of the reformed gas by changing the mixing ratio of natural gas, air, and process steam in the reformed gas production device based on the detection information of the hydrogen concentration detector. The gas reforming facility according to claim 2, which is configured as follows. A hydrogen concentration detector for a fuel gas disposed in at least the fuel gas supply passage of the reformed gas supply passage and the fuel gas supply passage;
A dilution gas supply device for diluting the fuel gas with the dilution gas, disposed in the mixing adjustment device;
The gas reforming equipment according to claim 1, wherein the control device is configured to mix the diluent gas from the diluent gas supply device to the fuel gas based on the detection information of the hydrogen concentration detector. A fuel gas hydrogen concentration detector disposed at least in the fuel gas supply passage of the reformed gas supply passage and the fuel gas supply passage;
The control device is configured to change the calorific value of the reformed gas by changing the mixing ratio of natural gas and air in the reformed gas production device based on the detection information of the hydrogen concentration detector. The gas reforming facility according to claim 1. A fuel gas hydrogen concentration detector disposed at least in the fuel gas supply passage of the reformed gas supply passage and the fuel gas supply passage;
The control device changes the heat generation amount of the reformed gas by changing the mixing ratio of natural gas, air, and process steam in the reformed gas production device based on the detection information of the hydrogen concentration detector. The gas reforming facility according to claim 2, which is configured as follows. A fuel gas calorific value measuring means disposed in at least the fuel gas supply passage of the reformed gas supply passage and the fuel gas supply passage;
The gas according to claim 1, wherein the control device is configured to adjust the amount of reformed gas supplied from the reformed gas production device to the mixing adjusting device based on detection information of the calorific value measuring means. Reforming equipment. A fuel gas calorific value measuring means disposed in at least the fuel gas supply passage of the reformed gas supply passage and the fuel gas supply passage;
The control device is configured to change the calorific value of the reformed gas by changing the mixing ratio of natural gas and air in the reformed gas production device based on the detection information of the calorific value measuring means. The gas reforming facility according to claim 1. A fuel gas calorific value measuring means disposed in at least the fuel gas supply passage of the reformed gas supply passage and the fuel gas supply passage;
The control device changes the calorific value of the reformed gas by changing the mixing ratio of natural gas, air, and process steam in the reformed gas production device based on the detection information of the calorific value measuring means. The gas reforming facility according to claim 2, which is configured as follows. Pressure measuring means for measuring the internal pressure of the passage disposed in the fuel gas supply passage,
The gas reformer according to claim 1, wherein the control device is configured to adjust the amount of reformed gas supplied from the reformed gas production device to the mixing adjusting device based on measurement information of the pressure measuring means. Quality equipment. A fuel gas calorific value measuring means disposed in at least the fuel gas supply passage of the reformed gas supply passage and the fuel gas supply passage;
A dilution gas supply device for diluting the fuel gas with the dilution gas, disposed in the mixing adjustment device;
The gas reforming equipment according to claim 1 or 12, wherein the control device is configured to mix the diluent gas from the diluent gas supply device to the fuel gas based on the detection information of the calorific value measuring means.   The gas reforming apparatus according to claim 1, wherein the reformed gas production apparatus further comprises a heating steam supply line for supplying heating steam from the gas turbine equipment to promote a chemical reaction in the reaction cylinder. Facility.   The reformed gas production apparatus further includes an extraction line for taking out high-temperature compressed air from the gas turbine equipment for heating to promote a chemical reaction in the reaction cylinder and supplying it to the reaction cylinder. The gas reforming equipment according to claim 14, wherein the gas reforming equipment is configured to selectively supply the gas.   The reformed gas production apparatus has a heat exchanging means in its reformed gas supply passage, and the heat exchanging means supplies the mixed gas of natural gas and air supplied to the reaction cylinder and the mixing adjusting apparatus. The gas reforming equipment according to claim 1, wherein the gas reforming equipment is configured to perform heat exchange with the reformed gas.   The gas reforming equipment according to claim 1, wherein the reformed gas supply passage has a cooling means for cooling the reformed gas supplied to the mixing adjusting device.   18. The gas according to claim 17, wherein the cooling means is disposed on the downstream side of the heat exchanging means in the reformed gas supply passage and is configured to condense and remove the liquid component in the reformed gas. Reforming equipment.   A buffer tank is disposed in the reformed gas supply passage, and the buffer tank absorbs fluctuations in the reformed gas flow rate so that the pressure of the reformed gas supplied to the mixing adjustment device is stabilized. The gas reforming facility according to claim 1, which is configured.

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