JP2005251603A - Method for abnormal stop of fuel gas manufacturing device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To apply an appropriate stopping process when the next startup is possible when an abnormal state occurs, and to reduce maintenance work by a user. <P>SOLUTION: When a start switch is turned on, a system check 120 is executed; and when abnormality is detected in the system check 120, a stopping process is executed according to a first stopping process pattern 122a. Then, a predetermined check after a status check 124 and a PSA status check 126 are executed; and when an abnormal state is detected by the checks, which stopping process pattern within preset first to sixth stopping process patterns 122a-122f the detected abnormal state belongs to is determined. An appropriate stopping process is applied according to the determined stopping process pattern. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a method for abnormally stopping a fuel gas production apparatus for purifying a hydrogen-rich fuel gas after reforming a hydrogen-containing fuel containing, for example, a hydrocarbon or an alcohol.

  For example, after reforming a hydrocarbon fuel such as natural gas or a hydrogen-containing fuel containing alcohol such as methanol to obtain a hydrogen-containing gas (reformed gas), the fuel gas is purified from the hydrogen-containing gas and then a fuel cell. A hydrogen production apparatus (fuel gas production apparatus) for supplying to a gas etc. is employed.

  For example, as shown in FIG. 12, a hydrogen production apparatus disclosed in Patent Document 1 includes a hydrodesulfurization unit 2 to which a fuel such as city gas is supplied from a compressor 1, and steam-reforming the desulfurized fuel. A steam reforming section 3 for producing a hydrogen-containing gas (hydrogen-rich gas), a catalyst combustion section 4 which is externally mounted around the steam reforming section 3 and catalytically combusts hydrogen and oxygen in the air, in the hydrogen-containing gas A gas shift unit 5 that converts carbon monoxide into carbon dioxide and hydrogen, and a PSA (Pressure Swing Adsorption) unit 6 that separates high-purity hydrogen from the hydrogen-containing gas after gas shift by pressure adsorption.

  The PSA unit 6 includes a hydrogen storage tank 8 for temporarily storing high-purity hydrogen before being supplied to the polymer electrolyte fuel cell (PEFC) 7, and an off-gas (unnecessary material) adsorbed and removed by the PSA unit 6. Is connected to an off-gas holder 9 that temporarily stores. The off-gas holder 9 supplies off-gas to the catalytic combustion unit 4 as fuel for heating the steam reforming unit 3.

  In this case, the PSA unit 6 is provided with a plurality of adsorption towers filled with an adsorbent that selectively adsorbs components other than hydrogen under high pressure and desorbs under reduced pressure. Then, by causing each adsorption tower to perform a cyclic operation consisting of adsorption-desorption-substitution-pressure increase, high-purity hydrogen is taken out while other components are discharged as off-gas.

JP 2002-20102 A (FIG. 1)

  In the above hydrogen production apparatus, an emergency stop may occur when any abnormality occurs during operation. However, depending on the abnormal state, it may be possible to re-start up by performing an appropriate stop process, but because the stop process under the same conditions is applied to all abnormal states, the user must be forced to perform maintenance work. become. As a result, there is a problem that the burden on the user cannot be increased and employed particularly in a domestic hydrogen production apparatus.

  The present invention solves this kind of problem, and when an abnormal state occurs, an appropriate stop process can be performed when the next start-up is possible, and maintenance work by the user can be performed as much as possible. An object of the present invention is to provide a method for abnormally stopping a fuel gas production apparatus that can be reduced.

  The present invention is a method for abnormally stopping a fuel gas production apparatus in which after reforming a hydrogen-containing fuel to obtain a reformed gas, unnecessary substances are removed from the reformed gas to purify a hydrogen-rich fuel gas. In this case, the hydrogen-containing fuel refers to a fuel containing hydrogen, such as a hydrocarbon or alcohol.

  First, when a start signal of the fuel gas production apparatus is input, various abnormal states of the fuel gas production apparatus are detected. Then, a determination is made as to which stop processing pattern the detected abnormal state belongs to among a plurality of preset stop processing patterns, and the fuel gas production apparatus is determined according to the determined stop processing pattern Is stopped.

  Further, it is preferable that an abnormality detection signal is output when it is determined that the abnormal state is not self-repairable. Since the abnormality detection signal is transmitted to, for example, a maintenance company, the maintenance work of the fuel gas production apparatus is quickly performed.

  In the present invention, since a plurality of stop processing patterns are set in advance, if the fuel gas production device is stopped according to the stop processing pattern corresponding to the detected abnormal state, it is appropriate when the next startup is possible. Stop processing can be performed. As a result, the fuel gas production apparatus can start a normal start reliably and promptly with a simple process and minimize the maintenance work by the user without imposing excessive maintenance work on the user. It becomes possible to suppress.

  FIG. 1 is a schematic configuration diagram of a household fuel gas production system (HRS) 10 that is a fuel gas production apparatus for carrying out an abnormal stop method according to an embodiment of the present invention.

  The household fuel gas production system 10 obtains a hydrogen rich gas (hereinafter referred to as reformed gas) by a reforming reaction of a hydrogen-containing fuel, for example, a hydrocarbon fuel such as methane or propane (hereinafter also referred to as reforming fuel). The reforming unit 12 includes a purification unit 14 that purifies high-purity hydrogen gas (hereinafter also referred to as fuel gas) from the hydrogen-rich gas, and a storage unit 16 that stores the fuel gas.

  The reforming unit 12 includes an evaporator 18 that has a combustion catalyst and evaporates the reforming fuel. A combustor (heating unit) 20 such as a burner is attached to the evaporator 18, and a water supply tank 21 is connected to the evaporator 18 through a water compressor 23 and a valve 25a.

  A reactor 22 that reforms the reforming fuel to obtain reformed gas is disposed downstream of the evaporator 18. A cooler 24 that cools the reformed gas is disposed downstream of the reactor 22, and a gas that separates the cooled reformed gas into a gas component and moisture is disposed downstream of the cooler 24. A liquid separator 26 is provided. The water separated by the gas-liquid separator 26 is supplied to the water supply tank 21.

  The reforming unit 12 is provided with an air supply mechanism 28. The air supply mechanism 28 includes an air compressor 30, and a reforming air supply path 32, a combustion air supply path 34, and an offgas discharge air supply path 36 are connected to the air compressor 30.

  The reforming air supply path 32 is connected to the evaporator 18 via an ejector 37 that sucks the reforming fuel by the reforming air, and the combustion air supply path 34 is connected to the burner 20 for off-gas discharge. The air supply path 36 is connected to the evaporator 18 via a PSA mechanism 42 described later. The reforming air supply path 32, the combustion air supply path 34, and the off-gas discharge air supply path 36 can be connected to the air compressor 30 via valves 38a, 38b, and 38c. The supply of the reforming fuel to the ejector 37 can be stopped via the valve 25b.

  A starter fuel supply path 39 is connected to the burner 20, and valves 38 d and 38 e are disposed in the starter fuel supply path 39. A branch air supply path 36a branched from the off-gas discharge air supply path 36 is connected to the start fuel supply path 39 between the valves 38d and 38e. A valve 38f is disposed in the branch air supply path 36a.

  A PSA mechanism 42 constituting the purification unit 14 is connected to the downstream of the gas-liquid separator 26 via a reformed gas supply path 40, and the reformed gas from which moisture has been separated is supplied to the PSA mechanism 42. The A branch path 46 is connected to the reformed gas supply path 40 via a three-way valve 44, and a compressor 48 and a cooler 50 are provided downstream of the three-way valve 44. A branch path 52 is provided upstream of the compressor 48 in the reformed gas supply path 40, and the branch path 52 and the off-gas discharge air supply path 36 are connected by a bypass path 54. A valve 56 is disposed in the bypass path 54. A back pressure adjusting valve 58 is disposed in the branch path 52.

  As shown in FIG. 2, the PSA mechanism 42 constitutes, for example, a three-column pressure swing adsorption device that can be connected to the compressor 48, and includes adsorption columns 60a, 60b, and 60c. Each adsorption tower 60a-60c is provided with pressure sensors 62a-62c for detecting the pressure in the tower. Valves 66a to 66c are disposed below the entrances and exits of the adsorption towers 60a to 60c, and the adsorption towers 60a to 60c are connected to the off-gas discharge path 68 through the valves 66a to 66c.

  The off-gas discharge path 68 is provided with a flow rate control valve 72, and the off-gas discharge path 68 is connected to the off-gas discharge air supply path 36 via an ejector 76.

  Fuel gas discharge valves 80a to 80c and pressure equalization (cleaning) valves 82a to 82c are provided above the entrances and exits of the adsorption towers 60a to 60c, and the adsorption towers 60a to 60c are connected to the valve 80a. It is possible to communicate with the fuel gas path 84 through ˜80c.

  As shown in FIG. 1, a pressure adjustment valve 86 and a flow rate control valve 88 are installed in parallel in the fuel gas path 84, and a compressor 90 and a pressure adjustment valve 92 are arranged in parallel. The fuel gas path 84 is connected to a filling tank 96 constituting the storage unit 16 via a valve 94, and a branch fuel gas path 98 is provided in the middle of the fuel gas path 84, and this branch fuel gas path 98. Is connected to a buffer tank 102 via a valve 100.

  The filling tank 96 supplies fuel gas to a fuel cell vehicle (not shown), while the buffer tank 102 supplies fuel gas to the stationary fuel cell in order to generate electricity in a stationary fuel cell (not shown) in the home. Supply.

  The home fuel gas production system 10 is provided with various sensors for detecting various abnormal states of the home fuel gas production system 10. Specifically, a pressure sensor 104 a is disposed in the vicinity of the air compressor 30, a pressure sensor 104 b is disposed in the off-gas discharge air supply path 36, and a pressure sensor 104 c is further disposed in the reforming fuel supply path 105. Is disposed.

  A pressure sensor 104 d is disposed in the evaporator 18, a pressure sensor 104 e is disposed in the reactor 22, and a pressure sensor 104 f is disposed adjacent to the downstream of the gas-liquid separator 26, while the downstream of the compressor 48. A pressure sensor 104g is arranged in the vicinity. Temperature sensors 106a, 106b and 106c are arranged in the evaporator 18, the burner 20 and the reactor 22, respectively.

  The home fuel gas production system 10 communicates and controls each auxiliary machine. In particular, in this embodiment, various abnormal states of the home fuel gas production system 10 include, for example, pressure sensors 104a to 104g and temperature. The detection is performed based on the detection signals of the sensors 106a to 106c, and it is determined whether or not the detected abnormal state belongs to which stop processing pattern among a plurality of preset stop processing patterns. For example, a control ECU (Electronic Control Unit) 108 is provided as a control unit that performs control for performing stop processing on the domestic fuel gas production system 10 according to the stop processing pattern.

  The control ECU 108 sends various information such as an abnormal state to the operation panel 110, and when it is determined that the abnormal state is not self-repairable, the control ECU 108 communicates the abnormal part and the content of the abnormality to the maintenance company 112. The maintenance company 112 can be notified of a serious failure that needs to be replaced.

  The operation of the household fuel gas production system 10 configured as described above will be described below.

  In the domestic fuel gas production system 10, the air compressor 30 is operated via the control ECU 108, and the reforming air, the combustion air, and the off-gas exhaust air are supplied to the reforming air supply path 32 and the combustion air, respectively. It is sent to the supply path 34 and the off-gas discharge air supply path 36.

  The reforming air supplied to the reforming air supply path 32 is supplied to the evaporator 18, and the evaporator 18 is supplied with reforming fuel such as natural gas and water, for example. . On the other hand, the burner 20 is supplied with combustion air and, if necessary, hydrogen or the like to perform combustion, and the evaporator 18 evaporates the reforming fuel and water.

The evaporated reforming fuel is sent to the reactor 22. In the reactor 22, for example, CH ₄ + 2O ₂ → CO ₂ + 2H ₂ O (exothermic reaction), which is an oxidation reaction, and a fuel reforming reaction by methane, oxygen in the air, and water vapor in the reforming fuel. A certain CH ₄ + 2H ₂ O → CO ₂ + 4H ₂ (endothermic reaction) is performed simultaneously (autothermal method).

  As described above, the reformed gas reformed by the reactor 22 is cooled by the cooler 24 and then supplied to the gas-liquid separator 26. The reformed gas from which moisture has been separated by the gas-liquid separator 26 is sent to the PSA mechanism 42 via the reformed gas supply path 40 and is compressed by the compressor 48 to constitute the PSA mechanism 42. 60c is selectively supplied (see FIG. 2).

  At that time, as shown in FIG. 3, in the PSA mechanism 42, for example, the adsorption step is performed in the adsorption tower 60a, the washing step in the adsorption tower 60b, and the decompression step in the adsorption tower 60c. Therefore, in the adsorption tower 60 a, components other than hydrogen are adsorbed to purify the fuel gas containing high-concentration hydrogen (hydrogen rich), and this fuel gas is supplied to the fuel gas path 84. As shown in FIG. 1, the fuel gas is selectively stored in the filling tank 96 and the buffer tank 102 under the action of the compressor 90.

  Further, as shown in FIG. 3, after the adsorption process at the adsorption tower 60a, the pressure equalization process at the adsorption tower 60b and the pressure equalization process at the adsorption tower 60c, the adsorption process at the adsorption tower 60a, and the pressure increase process at the adsorption tower 60b. And the desorption process is carried out in the adsorption tower 60c. Accordingly, off-gas (unnecessary material) generated by the desorption process in the adsorption tower 60c is discharged to the off-gas discharge path 68 under the opening action of the valve 66c (cleaning process).

  As shown in FIG. 1, the off-gas discharge path 68 is connected to an off-gas discharge air supply path 36, and the off-gas discharged to the off-gas discharge path 68 flows along the off-gas discharge air supply path 36. To the burner 20 through the off-gas discharge air. This off-gas is used as a combustion fuel for the burner 20.

  As described above, in the adsorption towers 60a to 60c, the adsorption process, the pressure reduction process, the pressure equalization process, the desorption process, and the cleaning process are sequentially performed, so that the fuel gas is continuously purified by the PSA mechanism 42. The fuel gas is supplied from the fuel gas path 84 to the storage unit 16.

  Next, an abnormal stop method for the household fuel gas production system 10 according to the present embodiment will be described.

  First, in the household fuel gas production system 10, a plurality of stop processing patterns in various system operation modes are set in advance. Specifically, as shown in FIG. 4, a system check 120 is started by turning on an unillustrated start switch (ignition switch) from the HRS stop 118. In this system check 120, when an abnormal state is detected, the process proceeds to the first stop processing pattern 122a.

  If an abnormal state is detected in the status check 124, the process proceeds to the first stop processing pattern 122a. If no abnormal state is detected, the process proceeds to the PSA status check 126. Similarly, in the PSA status check 126, if an abnormal state is detected, the process proceeds to the first stop processing pattern 122a. If no abnormal state is detected, the process proceeds to 128 before burner warm-up ignition.

  Before the burner warm-up ignition 128, when non-ignition or other abnormal state is detected, the process proceeds to the second stop processing pattern 122b. When these abnormal states are not detected, the process proceeds to 130 after the burner warm-up ignition. After the burner warm-up ignition 130, if an abnormal state such as misfire is detected, the process proceeds to the second stop processing pattern 122b. If no abnormal state is detected, the process proceeds to the combustion catalyst warm-up 132.

  The combustion catalyst warm-up 132 is a warm-up of the evaporator 18, and when an abnormal state such as a misfire of the burner (SBN) 20 or a misfire of the evaporator (CBN) 18 is detected, the third stop processing pattern 122c. Proceed to When the combustion catalyst warm-up 132 is normally performed, the reactor 22 proceeds to the reforming operation start and the PSA operation start 134. In this operation start 134, the process proceeds selectively to the fourth stop process pattern 122d, the fifth stop process pattern 122e, or the sixth stop process pattern 122f depending on the abnormal state.

  When the time is measured from the start of the PSA operation and after the reforming operation for a predetermined time and after the PSA operation 136, after the operation 136, the operation is selectively shifted to the fourth to sixth stop processing patterns 122d to 122f depending on the abnormal state. When the post-operation 136 is normally performed and the stop switch is turned on, the process proceeds to the PSA normal stop processing pattern 138 and then shifts to the HRS stop 118.

  Next, each stop processing pattern will be described in detail. In the first stop processing pattern 122a, when an abnormality is detected by the system check 120, the abnormality lamp is turned on as shown in FIG. 5 (step S1), and the ignition is turned off. (Step S2). Further, the control ECU 108 notifies the maintenance company 112 of the failure (step S3), and the maintenance company 112 repairs abnormal parts such as replacement of parts.

  As shown in FIG. 4, in the second stop processing pattern 122b, for example, when the burner 20 misfires or abnormally burns, the temperature sensor 106b of the burner 20, the temperature sensor 106c of the reactor 22, and the pressure sensor 104e of the reactor 22 are used. A failure has been detected. In this state, all the combustion air of the burner 20 is exhausted together with the warm-up air of the evaporator 18 in the circulation mode (the three-way valve 44 is turned on and connected to the branch path 46).

  At that time, it is necessary to prevent unburned start fuel from remaining in the circulation line at the next start. This is because excessive fuel is introduced into the evaporator 18 at the time of startup, and the catalyst temperature may rise rapidly.

  Therefore, first, the valves 38d and 38e are turned off to shut off the starting fuel supply passage 39, and the valve 38a is fully opened (100%) to scavenge the starting fuel in the circulation line with a large amount of air (in FIG. 6). Step S11). The three-way valve 44 is always on during the system warm-up, and this on-state is maintained.

  And in step S12, after performing said scavenging process only for predetermined time T1 second, all the supply systems are stopped. That is, in step S13, the air compressor 30, the valves 38b and 38c, and the ignition are turned off, and the valve 35a is closed (0%).

  In the third stop processing pattern 122c, the warm-up failure due to misfire of the evaporator 18 and / or the burner 20 is detected based on the temperature of the reactor 22 by the temperature sensor 106c and the temperature of the evaporator 18 by the temperature sensor 106a. Therefore, as shown in FIG. 7, while the valves 38d, 38e and 38f are closed, the valve 38a is fully opened (100%), and the starting fuel in the circulation line is scavenged by a large amount of air (step S21). . Further, similarly to steps S12 and S13 described above, steps S22 and S23 are performed, and all the supply systems are stopped.

  In the fourth stop process pattern 122d, as shown in FIG. 8, after the PSA mechanism 42 is subjected to the normal stop process (step S31), the entire household fuel gas production system 10 is subjected to the normal stop process. (Step S32).

  Furthermore, the fifth stop processing pattern 122e is when reforming is performed and fuel gas generation is started by the PSA mechanism. Here, when the detected values of the temperature sensor 106c of the reactor 22, the temperature sensor 106a of the evaporator 18 and the pressure sensors 104a to 104g are equal to or higher than the threshold value, the process proceeds to the fifth stop processing pattern 122e.

  For example, when the air compressor 30 and the valve 38c are considered to be broken down and the air supply amount is reduced, air is not particularly supplied to the evaporator 18, and the catalyst temperature becomes abnormally high due to the off-gas of the PSA mechanism 42. The evaporator 18 may be damaged.

  Therefore, as shown in FIG. 9, in order not to emit off-gas from the PSA mechanism 42, the PSA mechanism 42 and the compressor 48 are stopped, and the supply of reforming fuel and water is stopped so that the reformed gas is not purified. (In step S41, other: OFF). On the other hand, in order to increase the amount of air supplied to the evaporator 18, the valve 38c is fully opened (100%), and the air compressor 30 is kept on. Furthermore, in order to stop the compressor 48, while keeping the three-way valve 44 in an ON state, the valve 38a is fully opened (100%) in order to lower the temperature of the evaporator 18.

  Next, after performing the above state for a predetermined time T2 seconds (YES in step S42), the process proceeds to step S43. In this step S43, in order to scavenge the gas upstream of the PSA mechanism 42, the three-way valve 44 is turned off, while the valve 56 is turned on to introduce the scavenging gas into the evaporator 18 and exhaust it.

  Further, after a predetermined time T3 seconds have elapsed (YES in step S44), the process proceeds to step S45, and cooling by the air compressor 30, the valve 38a, and the cooling water is stopped. Thereafter, after a predetermined time T4 seconds have elapsed (YES in step S46), the process proceeds to step S47 to turn off the valve 38c, thereby avoiding an increase in internal pressure due to air.

  Furthermore, the sixth stop process pattern 122f is the same as the first stop process pattern 122a, and quickly shuts off the power supply.

  Further, in the PSA normal stop processing pattern 138, the home fuel gas production system 10 is normally stopped as shown in FIG. 10 (step S51). At that time, each of the filling tank 96 and the buffer tank 102 is filled with a predetermined amount of fuel gas. Next, it progresses to step S52 and the PSA mechanism 42 is stopped. In this PSA mechanism 42, the adsorption towers 60a to 60c are stopped at a normal start position, for example, any one of positions T1 to T3 in FIG. And the stop sequence of the reactor 22 is started (step S53).

  By the way, detection of abnormal states in the various system operation modes described above is performed based on detection signals from the pressure sensors 104a to 104g and the temperature sensors 106a to 106c. The abnormality detection threshold value of each sensor varies depending on each system operation mode, and some sensors set upper and lower limits within the same system operation mode. That is, it is possible to detect various abnormal states by using a minimum sensor, setting a threshold value for detecting failure and abnormality of various devices used in the household fuel gas production system 10.

  For example, as shown in FIG. 11, an abnormal state determination condition (threshold value) by the pressure sensor 104b and a stop processing pattern are set. The threshold value has a relationship of AkPa <BkPa <CkPa. The pressure sensor 104b monitors the air compressor 30, the valve 38c, the exhaust line including the off-gas discharge air supply path 36, the pressure loss of the combustion line including the start fuel supply path 39, the clogging of the ejector 76, and the like.

  Then, it is possible to determine whether or not there is a failure part and a serious failure from various system operation modes and abnormal states. Even if an abnormal signal is output, the system is stopped in a normal stop mode that does not cause a system abnormality at the next startup. In order to be able to do so, modes (b, c, d and e) are set in which the operation is continued for a short time after the abnormal state is detected and then stopped. On the other hand, when a serious failure that cannot be self-repaired occurs, an emergency stop mode (a, f) is selected immediately.

  In this case, in the present embodiment, as shown in FIG. 4, a plurality of stop processing patterns, for example, first to sixth stop processing patterns 122a, are pre-corresponding to the system operation mode of the household fuel gas production system 10. To 122f are set. For this reason, for example, if the domestic fuel gas production system 10 is stopped according to the stop processing pattern corresponding to various abnormal states detected by the pressure sensors 104a to 104g and the temperature sensors 106a to 106c, the next start-up is possible. In some cases, an appropriate stop process can be performed.

  That is, in the second to fifth stop processing patterns 122b to 122e, the normal stop mode is set so that a system abnormality does not occur at the next startup by continuing the operation for a short time after the abnormal state is detected. It can be stopped and the user is not forced to perform excessive maintenance work.

  On the other hand, when a serious failure that cannot be continued occurs, that is, when the process proceeds to the first and sixth stop processing patterns 122a to 122f, an emergency stop is immediately performed. Then, the maintenance company 112 can send the details of the failure and the location of the failure, for example, by communication, and can cause the maintenance company 112 to perform repairs such as parts replacement.

  As a result, the household fuel gas production system 10 can start normal startup reliably and quickly with a simple process, and the effect that the maintenance work by the user can be minimized is obtained. It is done.

It is a schematic block diagram of the domestic fuel gas manufacturing system for enforcing the abnormal stop method concerning the embodiment of the present invention. It is principal part structure explanatory drawing of the PSA mechanism which comprises the said household fuel gas manufacturing system. It is a time chart explaining operation | movement of the said PSA mechanism. It is explanatory drawing of a system operation mode and a stop process pattern. It is a flowchart of a 1st stop process pattern. It is a flowchart explaining a 2nd stop process pattern. It is a flowchart explaining a 3rd stop process pattern. It is a flowchart explaining a 4th stop process pattern. It is a flowchart explaining a 5th stop process pattern. It is a flowchart explaining a PSA normal stop pattern. It is explanatory drawing of the abnormal condition judgment conditions by the pressure sensor 104b, and stop mode. 1 is a schematic system diagram of Patent Document 1. FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 ... Domestic fuel gas production system 12 ... Reforming part 14 ... Purification part 16 ... Storage part 18 ... Evaporator 20 ... Burner 22 ... Reactor 24, 50 ... Cooler 26 ... Gas-liquid separator 28 ... Air supply mechanism 30 ... Air compressor 36 ... Off-gas discharge air supply path 40 ... Reformed gas supply path 42 ... PSA mechanisms 60a-60c ... Adsorption towers 62a-62c, 104a-104g ... Pressure sensors 38a-38f, 56, 66a-66c, 70, 72, 80a-80c, 82a-82c, 94, 100 ... Valve 68 ... Off-gas discharge passage 84 ... Fuel gas passage 96 ... Filling tank 102 ... Buffer tank 106a-106c ... Temperature sensor 108 ... Control ECU
110 ... Operation panel 112 ... Maintenance companies 122a to 122f ... Stop processing pattern 138 ... PSA normal stop processing pattern

Claims (2)

A method for abnormally stopping a fuel gas production apparatus for purifying hydrogen-rich fuel gas by removing unnecessary substances from the reformed gas after reforming the hydrogen-containing fuel to obtain a reformed gas,
Detecting various abnormal states of the fuel gas production device when a start signal of the fuel gas production device is inputted;
Determining whether the detected abnormal state belongs to any stop processing pattern among a plurality of preset stop processing patterns;
Applying a stop process to the fuel gas production device according to the determined stop process pattern;
A method of abnormally stopping a fuel gas production apparatus, comprising: 2. The abnormal stop method according to claim 1, wherein an abnormality detection signal is output when it is determined that the abnormal state is not self-repairable.

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