JP5369327B2 - Fuel reformer and its pretreatment method, fuel cell power generation system and its operation pretreatment method - Google Patents

Description

  The present invention relates to a fuel reformer and a pretreatment method thereof, a fuel cell power generation system on which the fuel reformer is mounted, and an operation pretreatment method thereof.

  The fuel cell power generation system uses hydrogen as the fuel and oxygen as the oxidant to react electrochemically to directly extract electricity, which can extract electrical energy with high efficiency, and at the same time, quiet and harmful exhaust gas It is a system that has an environmentally friendly feature that does not emit light. Recently, the development of small solid polymer fuel cells has been activated, and the popularization of household fuel cell power generation systems has become imminent.

  In a polymer electrolyte fuel cell power generation system, hydrogen-rich reformed gas is produced by a chemical reaction such as steam reforming from a hydrocarbon-based raw fuel such as city gas, LP gas or kerosene in a fuel reformer, Power is supplied to the fuel cell body.

  A fuel reformer is a desulfurizer that removes sulfur compounds contained as odorants and impurities in raw fuel, and a fuel gas that is a mixture of raw fuel and steam is converted into a hydrogen-rich reformed gas through a steam reforming reaction. Reformer, CO converter for reducing carbon monoxide (CO) in the reformed gas exiting the reformer to about 0.5% or less by a shift reaction, one reformed gas exiting from the CO converter It comprises a CO selective oxidizer that reduces carbon oxide (CO) to 10 ppm or less by a selective oxidation reaction, and a heat exchanger for making the temperature of each reactor appropriate.

  For example, as disclosed in Patent Document 1, the reformer includes a reforming reaction section filled with a reforming catalyst, a burner that heats the reforming catalyst, a burner combustion space, and the like. In order to prevent heat dissipation from the burner flame or combustion gas and to protect the heat of the reformer vessel, burner insulation is installed.

JP 2003-139305 A

  The burner insulation is made of a ceramic fiber molded product made mainly of alumina or silica. This burner heat insulating material may contain about 100 to 1000 ppm of chlorine contained originally in the raw material or chlorine contained in tap water used at the time of manufacture. When the burner heat insulating material is heated to a high temperature by burner combustion, this chlorine component is released as chlorine gas or chloride gas, becomes burner exhaust gas containing chlorine, and is sent to a heat recovery heat exchanger or the like downstream of the burner.

  When the burner exhaust gas becomes a low temperature by the heat recovery heat exchanger, the burner exhaust gas contains chlorine, so that condensed water containing chlorine is generated. Condensed water containing chlorine causes corrosion such as rust, pitting corrosion, and stress corrosion cracking in stainless steel materials such as heat recovery heat exchangers and piping.

  Rust, pitting corrosion, and corrosion have problems that cause deterioration in heat exchanger performance, water treatment resin life, piping blockage, and leakage of burner exhaust gas.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to prevent material corrosion of a heat recovery heat exchanger and piping disposed downstream of a burner of a fuel reformer, and to generate fuel cell power. It is possible to always operate the system stably.

In order to achieve the above object, a fuel reforming apparatus according to the present invention comprises a reforming reaction section filled with a reforming catalyst for reforming a fuel gas obtained by mixing a hydrocarbon-based raw fuel and steam into a hydrogen-rich gas, A burner part that heats the burner combustion space disposed adjacent to the reforming reaction part and a burner heat insulating material that is manufactured to have a chlorine content of 20 ppm-w or less are disposed so as to surround the burner combustion space. And a heat insulating part, wherein the chlorine gas flowing out into the burner exhaust gas discharged from the burner part can be reduced.

  The fuel cell power generation system according to the present invention includes a reforming reaction section filled with a reforming catalyst for reforming a fuel gas obtained by mixing a hydrocarbon-based raw fuel and water vapor into a hydrogen-rich gas, and the reforming reaction. A fuel reformer having a burner section that heats a burner combustion space that is disposed adjacent to the section, and a heat insulating section that includes a burner heat insulating material that is disposed so as to surround the burner combustion space, and from the burner combustion space A burner exhaust gas system that exhausts exhausted burner exhaust gas, a burner exhaust gas condenser that is disposed in the burner exhaust gas system and cools the exhaust gas flowing through the burner exhaust gas system to remove condensed water, and then exhausts it to the atmosphere; First chlorine analysis means for measuring the chlorine concentration of the condensed water.

  The fuel cell power generation system according to the present invention includes a reforming reaction section filled with a reforming catalyst for reforming a fuel gas obtained by mixing a hydrocarbon-based raw fuel and water vapor into a hydrogen-rich gas, and the reforming reaction. A fuel reformer having a burner section that heats a burner combustion space that is disposed adjacent to the section, and a heat insulating section that includes a burner heat insulating material that is disposed so as to surround the burner combustion space, and from the burner combustion space A burner exhaust gas system that exhausts exhausted burner exhaust gas, a burner exhaust gas condenser that is disposed in the burner exhaust gas system and cools the exhaust gas flowing through the burner exhaust gas system to remove condensed water, and then exhausts it to the atmosphere; A burner exhaust gas bypass system that branches off from the burner exhaust gas system and bypasses the burner exhaust gas condenser to discharge the burner exhaust gas into the atmosphere; and the burner exhaust gas bypasser And having a second chlorine analyzing means for measuring the chlorine concentration of the burner exhaust gas flowing through the system, the.

  Further, the pretreatment method of the fuel reformer according to the present invention includes a reforming reaction section filled with a reforming catalyst that reforms a fuel gas obtained by mixing a hydrocarbon-based raw fuel and steam into a hydrogen-rich gas, A pretreatment of a fuel reformer having a burner section for heating a burner combustion space disposed adjacent to the reforming reaction section, and a heat insulating section provided with a burner heat insulating material disposed so as to surround the burner combustion space In the method, a heat insulating material heating step of heating the burner heat insulating material to thermally decompose chlorine contained in the burner heat insulating material and generating burner exhaust gas containing the chlorine, and cooling the burner exhaust gas containing the chlorine. The chlorine content is less than or equal to a predetermined amount after the condensed water generating step for generating condensed water, the chlorine content measuring step for measuring the chlorine content contained in the condensed water, and the chlorine containing measuring step. The A chlorine content determination step of constant, after the chlorine content determination step, characterized by having a a heating stop step of stopping the heating of the burner insulation.

  The fuel cell power generation system pre-operation method according to the present invention includes a reforming reaction section filled with a reforming catalyst that reforms a fuel gas obtained by mixing a hydrocarbon-based raw fuel and water vapor into a hydrogen-rich gas. A fuel reformer having a burner section that heats a burner combustion space disposed adjacent to the reforming reaction section, and a heat insulation section that includes a burner heat insulating material disposed so as to surround the burner combustion space; A burner exhaust system for exhausting burner exhaust gas exhausted from the burner combustion space, in the pre-operation method of a fuel cell power generation system, heating the burner insulation and pyrolyzing chlorine contained in the burner insulation And a heat insulating material heating step for generating the burner exhaust gas containing chlorine, and a chlorine content for measuring the chlorine content contained in the burner exhaust gas circulating in the burner exhaust gas system. The heating of the burner insulation is stopped after the chlorine content determination step and the chlorine content determination step after the determination step and the chlorine content measurement step to determine that the chlorine content is below a predetermined amount. And a heating stop step.

  According to the present invention, the fuel cell power generation system suppresses material corrosion of the heat recovery heat exchanger and the pipe disposed downstream of the burner of the fuel reformer, and always operates the fuel cell power generation system stably. Is possible.

1 is a system configuration diagram showing a first embodiment of a fuel cell power generation system according to the present invention. It is a system configuration | structure figure which shows 2nd Embodiment of the fuel cell power generation system which concerns on this invention. It is a system configuration | structure figure which shows 3rd Embodiment of the fuel cell power generation system which concerns on this invention.

  Embodiments of the present invention will be described below with reference to the drawings.

[First Embodiment]
FIG. 1 is a system configuration diagram showing a first embodiment of a fuel cell power generation system 1 according to the present invention.

  The fuel cell power generation system 1 of this embodiment includes a fuel reforming system 1a and a power generation system 1b as main components. The fuel reforming system 1a has a function of reforming the raw fuel F into a hydrogen-rich reformed gas. The power generation system 1b has a function of reacting hydrogen in the reformed gas produced by the fuel reforming system 1a with oxygen in the air and taking out electricity generated by the reaction.

  The fuel reforming system 1 a includes a reactor such as a desulfurizer 2, a reformer 4, a CO converter 12, and a CO selective oxidizer 15, a raw fuel supply device 31 that supplies raw fuel F, and reformed water W A reforming water supply device 32 for supplying the water.

  Furthermore, the fuel reforming system 1a has a plurality of heat exchangers in order to optimally adjust the reaction temperature of each reactor and to improve the thermal efficiency. These heat exchangers include, for example, a fuel preheater 11, a steam generator 19, a burner fuel preheater 20, a burner air preheater 21, a burner exhaust gas condenser 23, and the like. The constituent materials of these reactors, heat exchangers, and pipes connecting them are mainly made of stainless steel in consideration of heat resistance and corrosion resistance.

  The desulfurizer 2, the reformer 4, the CO converter 12, the CO selective oxidizer 15, and the plurality of heat exchangers described above disposed in the fuel reforming system 1 a are provided for weight reduction and compactness. It is integrated. This integrated device is defined as a fuel reformer 50.

  The reformer 4 includes a reforming reaction section 5 filled with a reforming catalyst 6, a burner 7 for heating the reforming catalyst 6, a burner combustion space 8, and a burner heat insulating material disposed around the burner combustion space 8. 9 etc. The burner combustion space 8 has a portion in contact with the reforming reaction section 5 so that heat exchange with the reforming reaction section 5 can be performed. Further, a portion not in contact with the reforming reaction portion 5 is in contact with the burner heat insulating material 9 in order to prevent heat dissipation. A heat insulating material 10 is installed on the outer periphery of the reformer 4 to prevent heat dissipation.

The burner heat insulating material 9 of the present embodiment is a ceramic fiber molded product mainly made of alumina (Al ₂ O ₃ ), silica (SiO ₂ ), or the like. The burner heat insulating material 9 is formed so that the chlorine content is 20 ppm-w (weight) or less. The chlorine content of ceramic fiber molded products is affected by chlorides contained in raw materials and the chlorine content of tap water used during production. For this reason, in order to make the chlorine content of the burner heat insulating material 9 20 ppm-w or less, it is possible to use raw materials not containing chloride, use demineralized water at the time of manufacture, or calcination at the time of manufacture. Desalting is preferred.

  Further, the fuel reforming system 1a includes a raw fuel supply system 26, a reformed water supply system 28, a steam supply system 29, a burner air supply system 30, a CO selective oxidation air supply system 14, a burner exhaust gas system 22, and the like. Has been.

  The raw fuel supply system 26 supplies the raw fuel F from the raw fuel supply device 31 to the desulfurizer 2 by the raw fuel supply blower 33 or the like. The reforming water supply system 28 supplies the reforming water W from the reforming water supply device 32 to the steam generator 19 by the reforming water pump 34 or the like. The steam supply system 29 is formed so that the steam generated from the steam generator 19 joins the raw fuel supply system 26.

  The burner air supply system 30 takes in outside air through the burner air blower 35 and supplies air to the burner 7. The CO selective oxidation air supply system 14 supplies air to the upstream side of the CO selective oxidizer 15 by a CO selective oxidation air blower 37 or the like. The burner exhaust gas system 22 supplies the burner exhaust gas from the burner 7 to the burner exhaust gas condenser 23. A drain water tank 24 and a cooling water supply device 25 are connected to the burner exhaust gas condenser 23.

  The operation of the fuel cell power generation system 1 of this embodiment will be described below.

  During the start-up operation of the fuel cell power generation system 1, a part of the hydrocarbon-based raw fuel F is used for heating the reforming reaction unit 5. Part of this hydrocarbon-based raw fuel F is supplied from the burner air supply system 30 by driving the raw fuel supply blower 33, opening the start-up fuel shut-off valve 36, and flowing through the start-up fuel supply system 27. Merge with air. Thereafter, a part of the raw fuel F is supplied to the burner 7 of the reformer 4, and the reforming reaction section 5 is heated by causing a combustion reaction in the burner combustion space 8.

  After the reforming catalyst 6 filled in the reforming reaction section 5 is heated to a predetermined temperature, the supply of the raw fuel F and the reforming water W is started. First, the raw fuel F is supplied to the desulfurizer 2, and the sulfur compound contained in the raw fuel F is desulfurized by the desulfurization catalyst 3 filled in the desulfurizer 2. The desulfurized raw fuel F is mixed with steam at about 120 ° C. to 250 ° C. supplied from the steam supply system 29. The raw fuel gas in which the steam and the raw fuel F are mixed is supplied to the fuel preheater 11, heated to about 400 ° C., and then fed to the reforming reaction section 5 filled with the reforming catalyst 6 of the reformer 4. Supplied.

  In the reforming catalyst 6, the raw fuel gas is subjected to a steam reforming reaction at about 700 ° C. to generate a hydrogen-rich reformed gas. The steam reforming reaction is an endothermic reaction, and the heat source uses combustion gas flowing through the burner combustion space 8. The hydrogen-rich reformed gas produced in the reforming reaction section 5 is supplied to the fuel preheater 11 and cooled to about 250 ° C. by heat exchange with the raw fuel gas. Thereafter, the reformed gas is supplied to the CO shift catalyst 13 filled in the CO shift converter 12, and the CO concentration is reduced to about 0.5% or less by the shift reaction.

  The reformed gas whose CO concentration is reduced to about 0.5% or less by the CO converter 12 is mixed with the air flowing through the CO selective oxidizing air supply system 14 and then charged into the CO selective oxidizing device 15. It is supplied to the CO selective oxidation catalyst 16. The reformed gas supplied to the CO selective oxidation catalyst 16 has a CO concentration reduced to about several ppm by the CO selective oxidation reaction or methanation reaction.

  The hydrogen-rich reformed gas with reduced CO concentration produced by the fuel reformer 50 is supplied to the fuel cell anode electrode (not shown) of the fuel cell body 17 and the fuel cell cathode electrode (not shown). ) To generate electricity through chemical reaction with oxygen in the air. On the other hand, the unreacted fuel reformed gas (anode offgas) at the anode electrode is supplied to the burner 7 of the reformer 4 via the anode offgas system 18.

  In the burner 7, the fuel reformed gas supplied from the anode off-gas system 18 and the air supplied from the burner air supply system 30 react and burn. Thereby, in the burner combustion space 8, a combustion flame, combustion gas, etc. of about 1100-1400 degreeC are produced | generated. The generated combustion gas or the like heats the reforming reaction section 5 when flowing through the burner combustion space 8. Further, the burner heat insulating material 9 suppresses heat radiation from the burner combustion space 8 to the outside of the reformer 4. At this time, the burner heat insulating material 9 reaches about 500 ° C. to 1000 ° C. by the combustion gas. For this reason, the chlorine content contained in the burner heat insulating material 9 is thermally decomposed into chlorine gas or chlorinated gas and is separated from the burner heat insulating material 9.

  Chlorine contained in the burner heat insulating material 9 is released from the burner heat insulating material 9 and then mixed with the combustion gas to become burner exhaust gas containing chlorine and supplied to the steam generator 19. However, in this embodiment, since the chlorine content of the burner heat insulating material 9 is 20 ppm-w or less in advance, the generation of chlorine gas or chloride gas is very small.

  After the combustion by the anode off gas is started, the starting fuel cutoff valve 36 is closed, and the raw fuel F supplied to the burner 7 of the reformer 4 through the starting fuel supply system 27 is stopped. Let

  The burner exhaust gas that has been subjected to heat exchange with the reforming reaction section 5 and lowered to about 350 ° C. to 500 ° C. is supplied as a heat source to the steam generator 19 to change the water flowing through the reforming water supply system 28 into steam. Thereafter, the burner exhaust gas is lowered to about 120 to 180 ° C. and supplied to the burner fuel preheater 20 and the burner air preheater 21. The burner exhaust gas is preheated to the anode off gas and the burner air while flowing through the burner fuel preheater 20 and the burner air preheater 21, is lowered to about 60 to 100 ° C., and is discharged from the fuel reformer 50. . The burner exhaust gas discharged from the fuel reformer 50 flows through the burner exhaust gas system 22 and is sent to the burner exhaust gas condenser 23.

  The burner exhaust gas sent from the burner exhaust gas condenser 23 is cooled to about 40 ° C. below the dew point temperature by the cooling water supplied from the cooling water supply device 25, and the condensed water is removed. The burner exhaust gas from which the condensed water has been removed is released into the atmosphere. The condensed water generated in the burner exhaust gas condenser 23 is collected in the drain water tank 24.

  The water condensation of the burner exhaust gas occurs not only in the burner exhaust gas condenser 23 but also in the burner air preheater 21 at the time of cold start where the equipment temperature is low. However, since the amount of chlorine contained in the burner exhaust gas is very small, the amount of chlorine in the condensed water is also small, and the amount of corrosion such as rust, pitting corrosion and stress corrosion cracking is reduced.

  According to the present embodiment, the amount of chlorine flowing out from the burner heat insulating material 9 into the burner exhaust gas is reduced by using the burner heat insulating material 9 of the reformer 4 having a low chlorine content (20 ppm-w or less) in advance. It can be reduced. Thereby, corrosion of the heat exchanger and piping downstream of the burner can be prevented, and stable operation can always be performed over a long period of time.

[Second Embodiment]
A second embodiment of the fuel cell power generation system 1 according to the present invention will be described below. In addition, the same code | symbol is attached | subjected to the same part as 1st Embodiment, or a similar part, and duplication description is abbreviate | omitted. FIG. 2 is a system configuration diagram of the present embodiment.

  Even if this embodiment is a case where the chlorine content of the burner heat insulating material 9 incorporated in the reformer 4 is 20 ppm-w or more, before the fuel reformer 50 is mounted on the fuel cell power generation system 1, The fuel reformer 50 alone has a function of heating the burner insulation 9 to a high temperature to reduce the chlorine content to 20 ppm-w or less.

  In the present embodiment, the fuel reformer 50, the raw material supply device 51, the first chlorine analysis means 43a, and the like are the main components. The raw material supply device 51 includes a raw fuel supply system 26, a reformed water supply system 28, a burner air supply system 30, a CO selective oxidation air supply system 14, and a burner fuel supply system so that the fuel reformer 50 can be operated alone. 42 etc. are arranged. The first chlorine analysis means 43 a is disposed in the burner exhaust gas system 22 downstream of the fuel reformer 50.

  Below, the operating method of the fuel reformer 50 which heats the burner heat insulating material 9 with combustion gas, and pre-demineralizes the burner heat insulating material 9 is demonstrated.

  In the operation method of the fuel reformer 50 of the second embodiment, the difference from the first embodiment is that the burner fuel supply device 40 of the raw material supply system device 51 is replaced with the burner instead of the fuel reformed gas (anode off gas). The fuel B is supplied to the burner 7 through the burner fuel supply system 42 by the burner fuel blower 41 or the like.

  In the desalination pretreatment of the burner heat insulating material 9, first, the raw fuel F from the starting fuel supply system 27 and the air from the burner air system 30 are merged and supplied to the burner 7. The raw fuel F and air are combusted in the burner combustion space 8 to heat the reforming reaction section 5 and the burner heat insulating material 9. When the reforming reaction section 5 is heated to a predetermined temperature, the raw fuel F supplied from the starting fuel supply system 27 is stopped.

  Thereafter, the burner fuel B from the burner fuel supply system 42 is supplied to the burner 7, and the combustion in the burner combustion space 8 is continued. The burner heat insulating material 9 is heated to about 500 ° C. to 1000 ° C. by the combustion gas. By this heating, the chlorine content contained in the burner heat insulating material 9 is thermally decomposed into chlorine gas or chlorinated gas and is released from the burner heat insulating material 9. Chlorine separated from the burner heat insulating material 9 is mixed with the combustion gas and becomes burner exhaust gas containing chlorine, and is supplied to the downstream steam generator 19.

  The burner exhaust gas containing chlorine is discharged from the fuel reformer 50 after the heat is exchanged by the burner fuel preheater 20 and the burner air preheater 21 and is lowered to 60 to 100 ° C. The burner exhaust gas discharged from the fuel reformer 50 flows through the burner exhaust gas system 22 and is sent to the burner exhaust gas condenser 23.

  The burner exhaust gas sent to the burner exhaust gas condenser 23 is cooled to about 40 ° C. below the dew point temperature by the cooling water from the cooling water supply device 25, and the condensed water is removed. The burner exhaust gas from which the condensed water has been removed is released into the atmosphere. At this time, the condensed water generated in the burner exhaust gas condenser 23 is collected in the drain water tank 24. The chlorine concentration of this condensed water is measured by the first chlorine analysis means 43a. When it is confirmed by this measurement that the chlorine content has been reduced to 20 ppm-w, it is determined that the chlorine content of the burner heat insulating material 9 has become 20 ppm-w or less. Here, the operation of the desalination pretreatment is terminated.

  Note that the desalination pretreatment of the burner heat insulating material 9 is only required to be heated by the burner 7, so that either the raw fuel F of the starting fuel supply system 27 or the burner fuel B of the burner fuel supply system 42 is used as the fuel for the burner 7. Only may be used.

  According to the present embodiment, when the burner heat insulating material 9 having a high chlorine content is used, the fuel reformer 50 is operated as a single unit, so that the desalting pretreatment of the burner heat insulating material 9 can be performed. Thereby, since the fuel reformer 50 having the burner heat insulating material 9 whose chlorine content is controlled to 20 ppm-w or less can be mounted on the fuel cell power generation system 1, the heat exchanger and piping downstream of the burner can be installed. Corrosion can be prevented and stable operation can be performed for a long period of time.

[Third Embodiment]
A third embodiment of the fuel cell power generation system 1 according to the present invention will be described below. In addition, the same code | symbol is attached | subjected to the same part as 1st and 2nd embodiment, or a similar part, and duplication description is abbreviate | omitted. FIG. 3 is a system configuration diagram of the present embodiment.

  In this embodiment, even if the chlorine content of the burner heat insulating material 9 of the fuel reformer 50 mounted in the fuel cell power generation system 1 is 20 ppm-w or more, the burner heat insulating material 9 is heated to a high temperature. It has a function of reducing the chlorine content to 20 ppm-w or less.

  In the present embodiment, the fuel cell power generation system 1, the burner exhaust gas bypass system 44 and the second chlorine analysis means 43 b are configured. The burner exhaust gas bypass system 44 is connected to the burner exhaust gas bypass valve 22 from the burner exhaust gas system 22 downstream of the fuel reformer 50. 46 is arranged. In the burner exhaust gas bypass system 44, second chlorine analysis means 43b is arranged.

Below, the operating method of the fuel cell power generation system 1 which heats the burner heat insulating material 9 to high temperature with combustion gas, and desalinates the burner heat insulating material 9 is demonstrated.

  The operation method of the fuel cell power generation system 1 is different from that of the first embodiment in that the burner exhaust gas is discharged out of the fuel cell power generation system 1 via the burner exhaust gas bypass system 44 during the desalting process.

  The burner heat insulating material 9 is heated to about 500 ° C. to 1000 ° C. by the high-temperature combustion gas burned by the burner 7. Thereafter, the chlorine content contained in the burner heat insulating material 9 is thermally decomposed to become chlorine gas or chlorinated gas and is separated from the burner heat insulating material 9. Chlorine separated from the burner heat insulating material 9 is mixed into the combustion gas, becomes burner exhaust gas containing chlorine, and is supplied to the downstream steam generator 19. Further, the burner exhaust gas containing chlorine is discharged from the fuel reformer 50 after the heat is exchanged by the burner fuel preheater 20 and the burner air preheater 21 and is lowered to about 60 to 100 ° C. The burner exhaust gas discharged from the fuel reformer 50 is discharged outside the fuel cell power generation system 1 through the burner exhaust gas bypass system 44. At this time, the burner exhaust gas bypass valve 46 is opened and the burner exhaust gas valve 45 is closed. The burner exhaust gas is measured for chlorine concentration by the second chlorine analysis means 43b. When it is confirmed by this measurement that the chlorine content has been reduced to 20 ppm-w, it is determined that the chlorine content of the burner heat insulating material 9 has become 20 ppm-w or less. Here, the operation of the desalting process is terminated.

  According to this embodiment, even when the chlorine content of the burner heat insulating material 9 is large, the desalting process of the burner heat insulating material 9 can be performed in a state where the fuel reformer 50 is mounted on the fuel cell power generation system 1.

  The burner exhaust gas containing chlorine generated during the desalting treatment is discharged out of the fuel cell power generation system 1 before flowing through the burner exhaust gas condenser 23 of the fuel cell power generation system 1. Therefore, corrosion of the burner exhaust gas condenser 23 can be prevented, and stable operation can be performed for a long period of time.

[Other Embodiments]
The description of the above embodiment is an example for explaining the present invention, and does not limit the invention described in the claims. Moreover, each part structure of this invention is not restricted to the said embodiment, A various deformation | transformation is possible within the technical scope as described in a claim.

DESCRIPTION OF SYMBOLS 1 ... Fuel cell power generation system, 1a ... Fuel reforming system, 1b ... Power generation system, 2 ... Desulfurizer, 3 ... Desulfurization catalyst, 4 ... Reformer, 5 ... Reformation reaction part, 6 ... Reformation catalyst, 7 ... Burner, 8 ... burner combustion space, 9 ... burner heat insulating material, 10 ... heat insulation material, 11 ... fuel preheater, 12 ... CO converter, 13 ... CO conversion catalyst, 14 ... CO selective oxidation air supply system, 15 ... CO selection Oxidizer, 16 ... CO selective oxidation catalyst, 17 ... fuel cell body, 18 ... anode off-gas system, 19 ... steam generator, 20 ... burner fuel preheater, 21 ... burner air preheater, 22 ... burner exhaust gas system, 23 ... Burner exhaust gas condenser, 24 ... Drain water tank, 25 ... Cooling water supply device, 26 ... Raw fuel supply system, 27 ... Starting fuel supply system, 28 ... Reformed water supply system, 29 ... Steam supply system, 30 ... Burner Air supply system, 31 ... Raw fuel supply device, 32 ... Modified Water feeder, 33 ... raw fuel supply blower 34 ... reforming water pump, 35 ... burner air blower, 36 ... startup fuel cutoff valve, 37 ... CO selective oxidation air blower, 40 ... burner fuel supply device, 41 ... burner Fuel blower, 42 ... burner fuel supply system, 43a ... first chlorine analysis means, 43b ... second chlorine analysis means, 44 ... burner exhaust gas bypass system, 45 ... burner exhaust gas valve, 46 ... burner exhaust gas bypass valve, 50 ... fuel reform Quality equipment, 51 ... Raw material supply equipment

Claims (6)

A reforming reaction section filled with a reforming catalyst for reforming a fuel gas obtained by mixing a hydrocarbon-based raw fuel and water vapor into a hydrogen-rich gas;
A burner section for heating a burner combustion space disposed adjacent to the reforming reaction section;
A heat insulating portion in which a burner heat insulating material manufactured to have a chlorine content of 20 ppm-w or less is disposed so as to surround the burner combustion space ;
Have
A fuel reformer configured to reduce chlorine gas flowing out into burner exhaust gas discharged from the burner section.   2. The fuel reformer according to claim 1, wherein the burner heat insulating material is desalted by firing and has a chlorine content of 20 ppm-w or less. A reforming reaction section filled with a reforming catalyst for reforming a fuel gas mixed with hydrocarbon-based raw fuel and steam into a hydrogen-rich gas, and a burner combustion space disposed adjacent to the reforming reaction section are heated. A fuel reformer having a burner part and a heat insulating part provided with a burner heat insulating material disposed so as to surround the burner combustion space;
A burner exhaust gas system for exhausting the burner exhaust gas exhausted from the burner combustion space;
A burner exhaust gas condenser that is disposed in the burner exhaust gas system and cools the exhaust gas flowing through the burner exhaust gas system to remove condensed water, and then exhausts it to the atmosphere;
First chlorine analysis means for measuring the chlorine concentration of the condensed water;
A fuel cell power generation system comprising: A reforming reaction section filled with a reforming catalyst for reforming a fuel gas mixed with hydrocarbon-based raw fuel and steam into a hydrogen-rich gas, and a burner combustion space disposed adjacent to the reforming reaction section are heated. A fuel reformer having a burner part and a heat insulating part provided with a burner heat insulating material disposed so as to surround the burner combustion space;
A burner exhaust gas system for exhausting the burner exhaust gas exhausted from the burner combustion space;
A burner exhaust gas condenser that is disposed in the burner exhaust gas system and cools the exhaust gas flowing through the burner exhaust gas system to remove condensed water, and then exhausts it to the atmosphere;
A burner exhaust gas bypass system that branches off from the burner exhaust gas system and bypasses the burner exhaust gas condenser to discharge the burner exhaust gas into the atmosphere;
Second chlorine analysis means for measuring the chlorine concentration of the burner exhaust gas flowing through the burner exhaust gas bypass system;
A fuel cell power generation system comprising: A reforming reaction section filled with a reforming catalyst for reforming a fuel gas mixed with hydrocarbon-based raw fuel and steam into a hydrogen-rich gas, and a burner combustion space disposed adjacent to the reforming reaction section are heated. In a pretreatment method for a fuel reformer having a burner part and a heat insulating part comprising a burner heat insulating material arranged so as to surround the burner combustion space,
A heat insulating material heating step for heating the burner heat insulating material to thermally decompose chlorine contained in the burner heat insulating material and generating burner exhaust gas containing the chlorine;
A condensed water generating step of generating condensed water by cooling the burner exhaust gas containing the chlorine;
A chlorine content measuring step for measuring the chlorine content contained in the condensed water;
After the chlorine content measurement step, a chlorine content determination step for determining that the chlorine content is a predetermined amount or less,
After the chlorine content determination step, a heating stop step of stopping heating of the burner heat insulating material,
A pretreatment method for a fuel reformer characterized by comprising: A reforming reaction section filled with a reforming catalyst for reforming a fuel gas mixed with hydrocarbon-based raw fuel and steam into a hydrogen-rich gas, and a burner combustion space disposed adjacent to the reforming reaction section are heated. A fuel reformer having a burner part and a heat insulating part provided with a burner heat insulating material disposed so as to surround the burner combustion space;
A burner exhaust gas system for exhausting the burner exhaust gas exhausted from the burner combustion space;
In the pre-operation processing method of the fuel cell power generation system having
A heat insulating material heating step for heating the burner heat insulating material to thermally decompose chlorine contained in the burner heat insulating material and generating burner exhaust gas containing the chlorine;
A chlorine content measuring step for measuring the chlorine content contained in the burner exhaust gas flowing through the burner exhaust gas system;
After the chlorine content measurement step, a chlorine content determination step for determining that the chlorine content is a predetermined amount or less,
After the chlorine content determination step, a heating stop step of stopping heating of the burner heat insulating material,
A method for pre-operation of a fuel cell power generation system, comprising:

Images