KR20110096270A - Hydrocarbon reforming device using micro channel heater with startup unit - Google Patents

Abstract

PURPOSE: A hydrocarbon modifying apparatus using a micro channel heater equipped with a starting device is provided to compact a hydrogen preparing apparatus by improving the initial staring performance of the hydrocarbon modifying apparatus. CONSTITUTION: A plurality of heating plates and modifying plates equipped with micro channels are alternately stacked in a hydrocarbon modifying device(2000) and modify raw gas by implementing a thermal exchanging process with combustion heat generated from air and fuel gas and a contacting process with a modifying catalyst. A staring device(2100) supplies the fuel gas and ignites the fuel gas by being in connection with the hydrocarbon modifying device. The starting device is composed of a connecting pipe(310), a fuel pipe(312), an ignition pipe(316), and an on-off valve(300). One end of the connecting pipe is in connection with the hydrocarbon modifying device. The fuel pipe connects fuel source and the connecting pipe. The ignition pipe is installed at another end of the connecting pipe and includes an ignition part. The on-off valve is arranged between the ignition pipe and the connecting pipe.

Description

Hydrocarbon reforming device using micro channel heater with startup unit

The present invention relates to a hydrocarbon reformer using a microfluidic heater having a starting device. More specifically, fuel ignition is performed by inducing a flow of fuel and air mixed gas into the conduit connected to the starter outside of the reformer at the start of the reformer and starting the ignition of the reforming catalyst and the reformed gas after ignition. The present invention relates to a hydrocarbon reformer using a microfluidic heater having a starting device for switching the flow direction.

The development of various industries is expected to increase the demand for on-site or on-board small hydrogen production equipment. Commercialized large-scale hydrogen production process is shown in FIG. That is, the hydrocarbons are converted to a synthesis gas containing hydrogen and carbon monoxide in the reformer 10, and then converted into aqueous gas (WGS, Water Gas Shift) in the carbon monoxide aqueous reactor 20, and then the catalyst or Hydrogen is produced by removing carbon monoxide from the reformed gas using a separator or the like. At this time, the heat of reaction required by the reformer 10 is utilized as the heat of combustion generated by burning a part of hydrogen generated in the hydrogen separation device 30 in the combustor 40.

Looking at the reaction of generating hydrogen using a hydrocarbon it is possible to proceed using a variety of reactions, such as Schemes 1 to 3.

Scheme 1

CH ₄ + H ₂ O → CO + 3H ₂ , reaction heat: + 206kJ / mol

Scheme 2

CO ₂ + CH ₄ → 2CO + 2H ₂ , Reaction heat: + 247kJ / mol

Scheme 3

CH ₄ + 1 / 2O ₂ → CO + 2H ₂ , heat of reaction: -36kJ / mol

Among these, the steam reforming reaction according to Scheme 1, which has the highest hydrogen concentration in the product, is drawing attention. However, in the case of steam reforming reaction, it is a large endothermic reaction, and requires a heat supply necessary for the reaction outside the catalyst bed. In the case of the steam reforming reaction, since the conversion rate of hydrocarbon (methane) of 95% or more can be obtained at the reaction temperature of 750 ° C or higher, it is necessary to make an effort to supply the reaction heat with maintaining the high temperature. Reaction heat required in Scheme 1 is generated through combustion (catalytic oxidation or combustion) of hydrocarbons as in Scheme 4.

Scheme 4

CH ₄ + 2O ₂ → CO ₂ + 2H ₂ O, heat of reaction: -801kJ / mol

In order to effectively achieve heat transfer in Scheme 4, a material having a high temperature difference (ΔT), a large contact area (A), and a high heat transfer coefficient (k) is required.

However, it is impossible to raise the temperature of the flame necessary for heating indefinitely in order to obtain the temperature difference, and there is a problem of the material of construction. In addition, the heat transfer coefficient is also limited by the inherent value of the constituent material.

Therefore, as an adjustable item in the reactor configuration, it results in an enlarged direction of the heat transfer area A.

As a reactor for this use, an attempt is made to use a reactor having a microchannel in a metal sheet. In particular, the applicant of the present invention has developed Korean Patent Registration No. 10-0719486 (Micro Combustion / Reforming Reactor), Korean Patent Application No. 10-2009-0124091 (Hydrogen Reformer using a micro-flow heater), Rapid startup via combustion catalysts discloses having a micro combustion / reforming reactor.

The combustion reaction of hydrocarbons (NG, LPG, alcohols) necessary to generate the heat of reaction may be carried out through catalytic combustion or non-catalytic combustion in a violent reaction that generates a very large calorific value.

The catalytic oxidation has a problem in its durability when it is exposed to high heat for a long time when coating the inside of the micro flow path with the preheating of the catalyst layer up to a temperature range where the oxidation reaction can start. That is, in the case of an oxidation catalyst, it is difficult to maintain its oxidative activity when exposed to high heat at all times when a combustion apparatus is operated, which is a limitation in practical use. In addition, in non-catalytic combustion, it is not possible to apply to a compact microfluidic reactor because a space for ignition flame can be expanded.

The starter of the hydrocarbon reformer using a microfluidic reactor enables the construction of a compact microfluidic reactor and facilitates the heat supply required for initial startup, thereby simplifying the reactor heating system. In addition, since the combustion apparatus is not exposed to high heat for a long time, the oxidative activity of the catalyst can be maintained, thereby further approaching practical use. In order to apply to the microfluidic reactor as in the present invention, a reactor configuration is necessary so that it can be well connected with its characteristics.

An object of the present invention devised to solve the above problems, the heating fuel required for the start of the hydrocarbon reformer using a micro-flow reactor uses a mixture of hydrogen or hydrogen and hydrocarbon, and the mixture of fuel and air when starting Provides a hydrocarbon reformer using a microfluidic heater having a starter which induces flow to the conduit connected to the starter and proceeds fuel ignition and changes the flow direction in the reactor direction for heating the reforming catalyst and the reformed gas after the ignition. It's there.

The present invention was completed in the light of the fact that the hydrogen oxidation reaction as in Scheme 5 can be started from room temperature on the surface of the noble metal catalyst.

Scheme 5

H ₂ + 1 / 2O ₂ → H ₂ O + Generated heat: 56kJ / mol

That is, the reactor can be operated to produce a main heat source by heating to a certain temperature using hydrogen and supplying methane at the beginning of the reactor. Alternatively, it can be complexed from room temperature using a mixed gas of hydrogen and other hydrocarbons from the start of the reactor.

Thus, since the reactor heating system can be simplified when using hydrogen having good ignition alone or mixed with hydrocarbons, the competitiveness of a compact reactor like a microfluidic reactor can be enhanced.

In the starter, an oxidation catalyst coating material is placed outside of the fuel supply line which connects the initial ignition point of air and fuel for ignition to the fuel supply. An on / off valve is provided between the fuel supply pipe and the oxidation catalyst to close the valve after the initial ignition and change the gas flow.

Accordingly, the present invention for achieving the above object, a plurality of heating plates and reforming plate in which a fine flow path is formed to reform the raw material gas by heat exchange with combustion heat generated by supplying air and fuel gas and contact with a reforming catalyst. A hydrocarbon reformer in which is alternately stacked; And a starter connected to the hydrocarbon reformer to supply fuel gas, and igniting the fuel gas at startup, the starter comprising: a connecting pipe connected to one side of the hydrocarbon reformer; A fuel pipe communicating with a fuel supply source and said connection pipe; An ignition tube installed on the other side of the connection tube and having an ignition portion therein; And an on / off valve disposed between the ignition pipe and the connection pipe.

Another invention, the upper plate is formed with an air supply pipe connected to the air supply is supplied with air, a fuel supply pipe connected to the starter is connected to the fuel supply source, the generated reformed gas discharge pipe; And a lower plate connected to the raw material supply source to supply a raw material gas and a generated exhaust gas discharge pipe. An air preheating unit installed at a lower portion of the upper plate and alternately stacking a heating plate and a reforming plate for pre-heating the air supplied from the air supply pipe by the residual heat of the reforming gas and mixing and combusting the complexed fuel; An upper flow passage isolation plate installed below the air preheating unit and passing only the exhaust gas and the reformed gas; A heating plate disposed below the upper flow passage isolation plate, the heating plate conducting combustion heat of the exhaust gas, a catalyst holder plate in contact with the lower side of the heating plate, and installed to expose a reforming catalyst to the lower side; and a lower portion of the catalyst holder plate. A reforming reaction unit installed in the reforming reaction unit and having a reforming plate for contacting the raw material gas in a horizontal direction with the reforming catalyst; An upper flow path separation plate installed below the reforming reaction unit and configured to pass only the exhaust gas and the preheated raw material gas passing through the reforming reaction unit; And a reforming preheater installed at a lower portion of the upper flow path isolation plate to alternately arrange a heating plate and a reforming plate for preheating the raw material gas into exhaust gas passing through the reforming reaction unit, wherein the heating plate and the reforming plate are alternately disposed. Fine passages are formed on the upper surface of the plate, respectively, and the starter includes: a connection pipe having one side connected to the fuel supply pipe; A fuel pipe communicating with a fuel supply source and said connection pipe; An ignition tube installed on the other side of the connection tube and having an ignition portion therein; And an on / off valve disposed between the ignition pipe and the connection pipe.

The fuel gas is any one of hydrogen and a hydrocarbon or a mixture thereof, thereby allowing room temperature ignition.

The ignition unit may be an ignition catalyst installed in the ignition pipe or an electric ignition device installed in the ignition pipe.

Through the present invention, the utilization of a small and medium-sized compact hydrogen production apparatus is expected by providing a micro-channel hydrocarbon reformer having a low risk of loss of oxidation catalyst and good initial maneuverability. In particular, when the hydrogen purification process is used as a hydrogen production apparatus in conjunction with the separator, the membrane can be used as a fuel because it can utilize the non-permeable gas containing the hydrogen as a fuel.

In addition, the present system can achieve a good effect in connection with various fuel cells in which off-gas waste gas containing hydrogen is present.

1 is a block process diagram of the hydrogen production according to the prior art.
2 is a perspective view of the assembled state of the hydrocarbon reformer.
3 is an exploded perspective view of a hydrocarbon reformer according to the present invention.
4 is a reactor heating pattern using hydrogen by driving the starter according to the present invention.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described. In adding reference numerals to components of the following drawings, it is determined that the same components have the same reference numerals as much as possible even if displayed on different drawings, and it is determined that they may unnecessarily obscure the subject matter of the present invention. Detailed descriptions of well-known functions and configurations will be omitted.

As shown in FIG. 3, the hydrocarbon reformer 3000 according to the embodiment of the present invention is configured by stacking a plurality of plates, and joining them in a compact form by diffusion bonding, electric welding, or arc welding. It comprises a hydrocarbon reformer 2000, and the starting device 2100 for the initial ignition connected to the hydrocarbon reformer 2000.

First, the hydrocarbon reformer 2000 will be described.

In the hydrocarbon reformer 2000, the upper plate 100 and the lower plate 250 are disposed at the uppermost and lowermost sides.

In the hydrocarbon reformer 2000, the upper plate 100 and the lower plate 260 are disposed at the uppermost and lowermost sides.

In addition, air between the upper plate 100 and the lower plate 200 alternately stacked with air preheating plates 110 and 130 for heating air or fuel and reformed gas cooling plates 120 and 140 for lowering the discharge temperature of the reformed gas. A preheating unit, a reforming reaction unit in which a combustion heat exchange plate 160 and 170 combusting the preheated fuel and air and a catalyst plate 180 and a reforming reaction plate 190 for reforming the source gas to generate reformed gas are stacked; The reforming preheating plates 220 and 240 for preheating the raw material gas and the waste heat recovery plates 210 and 230 for recovering the residual heat of the combustion exhaust gas are alternately placed in order. In addition, an upper flow path separation plate 150 is disposed between the air preheater and the reforming reaction part to control the flow of air, fuel, reformed gas, and source gas, and between the reforming reaction part and the reforming preheater. The lower flow path isolation plate 200 is disposed.

In the hydrocarbon reformer 2000, the cross-sectional shape is basically formed in a rectangular shape so that the formation of the flow path in the diagonal direction is easy considering the ease of manufacture and the efficiency per unit area.

An air supply pipe 101, a reformed gas discharge pipe 102, a fuel supply pipe 103, and a reformed gas temperature measuring tube 104 are disposed outside the upper plate 100. The air supply pipe 101 and the fuel supply pipe 103 face in a diagonal direction, and the reformed gas discharge pipe 102 and the reformed gas temperature measuring tube 104 face in a diagonal direction.

The air preheating plates 110 and 130 and the reformed gas cooling plates 120 and 140 corresponding to the air preheating part are alternately disposed below the upper plate 100. The air preheating plates 110 and 130 preheat the incoming air to facilitate combustion, and the amount of heat required for preheating is absorbed from the discharged reformed gas. In addition, the reformed gas cooling plates 120 and 140 may recover energy contained in the reformed gas to increase energy efficiency. In the exemplary embodiment of the present invention, the air preheating plates 110 and 130 and the reforming gas cooling plates 120 and 140 are used, respectively, but the number may be increased. However, overall thickness increase and manufacturing cost should be considered.

The air preheating plates 110 and 130 and the reformed gas cooling plates 120 and 140 communicate with first to fourth air supply holes 111, 121, 131 and 141 communicating with the air supply pipe 101 and the reformed gas discharge pipe 102, respectively. First to fourth reformed gas discharge holes 112, 122, 132, and 142, first to fourth combustion holes 113, 123, 133, and 143 communicating with the fuel supply pipe 103, and first to communicate with the reformed gas temperature measuring tube 104. To fourth reformed gas distribution holes 114, 124, 134 and 144 are formed.

In addition, first to fourth microchannels 115, 125, 135, and 145 are formed in the upper portions of the air preheating plates 110 and 130 and the reformed gas cooling plates 120 and 140, respectively. The first micro channel 115 communicates with the first air supply hole 111 and the first combustion hole 113, and the first reformed gas discharge hole 112 and the first reformed gas distribution hole. Isolate 114 from each other. The second micro flow path 125 communicates the second reformed gas discharge hole 122 and the second reformed gas distribution hole 124 with each other, and the first air supply hole 121 and the second combustion hole. Isolate 123 from each other. The third micro flow path 135 communicates with the third air supply hole 131 and the first combustion hole 133, and the third reformed gas discharge hole 132 and the third reformed gas distribution hole. Isolate 134 from each other. The fourth micro flow path 145 communicates the fourth reformed gas discharge hole 142 and the fourth reformed gas distribution hole 144 with each other, and the first air supply hole 141 and the second combustion hole. Isolate 143 from each other.

An upper flow path isolation plate 150 is disposed below the air preheating unit to block communication between the air supply pipe 101 and the reformed gas discharge pipe 102. A fifth reformed gas distribution hole 154 and a fifth combustion hole 153 are formed in the upper flow path isolation plate 150 to communicate with the reformed gas temperature measuring tube 104 and the fuel supply pipe 103, respectively.

A reforming reaction unit is disposed below the upper flow path isolation plate 150, and the reforming reaction unit includes combustion heat exchange plates 160 and 170, a catalyst holder plate 180, and a reforming reaction plate 190.

The combustion heat exchange plates 160 and 170 are disposed in contact with the lower side of the upper flow path isolation plate 150. The number of combustion heat exchange plates 160 and 170 may be increased or decreased as necessary. The combustion heat exchange plates 160 and 170 have shapes similar to those of the preheat plates 110 and 130. That is, the combustion heat exchange plates 160 and 170 discharge the sixth and seventh exhaust gas distribution holes 161 and 171 and the first to fourth reformed gas at positions corresponding to the first to fourth air supply holes 111, 121, 131, and 141. Sixth and seventh idle holes 162 and 172 at positions corresponding to the holes 112, 122, 132 and 142, Sixth and seventh combustion holes 163 and 173 communicating with the first to fifth combustion holes 113, 123, 133, 143 and 153, and The first and seventh combustion holes 163 and 173, respectively. Sixth and seventh reformed gas distribution holes 164 and 174 communicating with the fifth to fifth reformed gas distribution holes 114, 124, 124, 134 and 144 are formed.

In addition, sixth and seventh microchannels 165 and 175 are formed concave on the combustion heat exchange plates 160 and 170, respectively. The sixth and seventh minute passages 165 and 175 communicate with the sixth and seventh exhaust gas distribution holes 161 and 171 and the sixth and seventh combustion holes 163 and 173, and the sixth and seventh idle holes. 162 and 172 and the sixth and seventh reformed gas distribution holes 164 and 174 are isolated from each other.

The sixth and seventh idle holes 162 and 172 do not need to be formed in the combustion heat exchange plates 160 and 170. However, it is formed in the same manner as the air preheating plates (110, 130) for the convenience of manufacturing.

In addition, in the sixth and seventh microchannels 165 and 175, a combustion catalyst such as platinum may be provided to assist combustion.

A catalyst holder plate 180 is installed below the combustion heat exchange plates 160 and 170. The catalyst holder plate 180 is installed at the center such that the reforming catalyst 185 is exposed at its upper and lower surfaces. Therefore, the bottom surface of the reforming catalyst 185 faces the reforming reaction plate 190 described below. The reforming catalyst 185 may be formed to have the same thickness as that of the catalyst holder plate 180. Therefore, since the reforming catalyst 185 is supported between the bottom surface of the combustion heat exchange plate 170 and the top surface of the reforming reaction plate 190, it can withstand high pressure. In addition, the area of the reforming catalyst 185 is larger than the ninth micro-channel 195 to cover the ninth micro-channel 195 is effective for the reforming reaction. Due to the configuration as described above, the source gas in the space between the reforming catalyst 185 and the ninth micro-channel 195 can be moved in a direction parallel to the plane of the reforming catalyst 185.

In addition, the catalyst holder plate 180 includes an eighth exhaust gas discharge hole 181 at positions corresponding to the first to fourth air supply holes 111, 121, 131, and 141, and the first to fifth reformed gas distribution holes 114, 124, 124, 134, and 144. ), An eighth reforming gas distribution hole 184 is formed. In addition, a position corresponding to the first to fourth reformed gas discharge holes 112, 122, 132, and 142 in the catalyst holder plate 180 and a position corresponding to the first to fourth reformed gas distribution holes 114, 124, 134, and 144 are closed, and the gas is closed. The distribution of the gas is not made, and the eighth exhaust gas discharge hole 181 and the eighth reforming gas distribution hole 184 are isolated from each other.

The reforming catalyst 185 was molded to a thickness of 1.2 mm by pressing a nickel powder (average particle diameter: 1.0 μm) at a pressure of 618 kg _f / cm ² . The molded body is sintered at 700 ° C. for 2 hours in a hydrogen gas atmosphere to produce a circular disk, and cut into a rectangular shape.

The reforming catalyst 185 may vary depending on the reforming material. Methane, diesel, gasoline can be prepared using nickel powder, and if ethanol or methanol is used as a raw material, a fine metal powder containing copper as a main component can be produced.

Next, a reforming reaction plate 190 is disposed below the catalyst holder plate 180. The reforming reaction plate 190 has a shape substantially similar to that of the reforming gas cooling plates 120 and 140. That is, the reforming reaction plate 190 may include a ninth exhaust gas distribution hole 191 and the first to fourth reformed gas discharge holes 112, 122, 132, and 142 at positions corresponding to the first to fourth air supply holes 111, 121, 131, and 141. ), A ninth source gas distribution hole 192 at a position corresponding to the ninth source gas, a ninth idle hole 193 at a position corresponding to the first to fifth combustion holes 113, 123, 133, 143, and 153, and the first to fifth reformed gas. The ninth reformed gas distribution hole 194 is formed at a position corresponding to the distribution holes 114, 124, 124, 134, and 144.

In addition, a ninth micro-channel 195 is formed in the upper portion of the reforming reaction plate 190. The ninth micro channel 195 communicates the ninth source gas distribution hole 192 and the ninth reformed gas distribution hole 194 with each other, and the ninth exhaust gas distribution hole 191 and the ninth idle. Isolate the holes 193 from each other.

The ninth idle hole 193 may not be formed in the reforming reaction plate 190. However, it is formed in the same manner as the reformed gas cooling plates (120, 140) for the convenience of manufacturing.

In addition, a reforming catalyst such as nickel may be provided in the ninth microchannel 195 to assist the reforming reaction.

The lower flow path isolation plate 200 is disposed below the reforming reaction unit to block communication between the ninth idle hole 193 and the ninth reforming gas distribution hole of the reforming reaction plate 190. A tenth exhaust gas distribution hole 201 and a tenth source gas distribution hole 202 are connected to the lower flow path isolation plate 200 such that a ninth exhaust gas distribution hole 191 and a ninth source gas distribution hole 192 communicate with each other. ) Is formed.

A reforming preheating unit is disposed below the lower flow passage isolation plate 200. The reformed heat dissipation unit alternately arranges the waste heat recovery plates 210 and 230 and the reformed preheating plates 220 and 240. The reforming preheating plates 220 and 240 preheat the incoming raw gas to facilitate the reforming reaction, and the amount of heat required for preheating is absorbed from the exhaust gas discharged. In addition, the waste heat recovery plates 210 and 230 may recover heat contained in the exhaust gas to increase energy efficiency. In the embodiment of the present invention, the waste heat recovery plates 210 and 230 and the reforming preheating plates 220 and 240 are used, respectively, but the number may be increased. However, overall thickness increase and manufacturing cost should be considered.

The waste heat recovery plates 210 and 230 and the reforming preheating plates 220 and 240 respectively include the eleventh through 14th exhaust gas distribution holes 211, 221, 231 and 241 communicating with the tenth exhaust gas distribution hole 201, and the tenth source gas. 11th to 14th exhaust gas discharge holes 213, 223, 233, and 243 at the positions corresponding to the 11th to 14th source gas distribution holes 212, 222, 232, 242 communicating with the distribution holes 202 and the first to 7th combustion holes 113, 123, 133, 143, 153, 163, and 173. And the eleventh through fourteenth source gas supply holes 214, 224, 234 and 244 at positions corresponding to the first through fourth reformed gas distribution holes 114, 124, 134 and 144.

In addition, eleventh to fourteenth micro flow paths 215, 225, 235, and 245 are formed in the upper portions of the waste heat recovery plates 210 and 230 and the reforming preheating plates 220 and 240, respectively. The eleventh minute flow path 215 communicates with the eleventh exhaust gas distribution hole 211 and the eleventh exhaust gas discharge hole 213, and the eleventh source gas distribution hole 212 and the eleventh raw material. The gas supply holes 214 are isolated from each other. The twelfth fine passage 225 communicates the twelfth source gas distribution hole 222 and the twelfth source gas supply hole 224 with each other, and the twelfth exhaust gas distribution hole 221 and the twelfth exhaust gas. The gas discharge holes 223 are isolated from each other. The thirteenth minute flow path 235 communicates with the thirteenth exhaust gas distribution hole 231 and the thirteenth exhaust gas discharge hole 233, and the thirteenth source gas distribution hole 232 and the thirteenth raw material. The gas supply holes 234 are isolated from each other. The fourteenth minute flow path 245 communicates the fourteenth source gas distribution hole 242 and the fourteenth source gas supply hole 244 with each other, and the fourteenth exhaust gas distribution hole 241 and the fourteenth exhaust gas. The gas discharge holes 243 are isolated from each other.

The lower plate 250 is disposed below the reforming preheating unit. The lower plate may include a source gas temperature measuring tube 252 communicating with the tenth through fourteenth source gas distribution holes 212, 222, 232, and 242, and an exhaust gas discharge tube communicating with the eleventh through fourteenth exhaust gas discharge holes 213, 223, 233, and 243. 253 and the source gas supply pipes 254 communicating with the eleventh through fourteenth source gas supply holes 214, 224, 234 and 244 are integrally formed.

The reformed gas temperature measuring tube 104 of the upper plate 100 and the source gas temperature measuring tube 252 of the lower plate are respectively provided with a thermocouple (not shown) to discharge the reformed gas and the supplied source gas. The temperature can be measured.

In addition, the microchannels 115, 125, 135, 145, 165, 175, 195, 215, 225, 235, and 245 form a hermetic flow path between the bottom surfaces of the plates immediately above. In addition, the micro flow path (115, 125, 135, 145, 165, 175, 195, 215, 225, 235, 245) has a large cross-sectional area compared to the surrounding holes to reduce the flow rate of air, source gas, exhaust gas, and reforming gas to increase the heat transfer efficiency.

The air preheating plates 110 and 130, the combustion heat exchange plates 160 and 170, and the waste heat recovery plates 210 and 230 correspond to the same heating plate. The reformed gas cooling plates 120 and 140, the reforming reaction plate 190, and the reforming preheating plates 220 and 240 correspond to the same reforming plates. When the heating plate is phase shifted 180 degrees (rotated 180 degrees), the heating plate is the same as the modified plate. Therefore, the present invention can use the same parts, which can greatly reduce the manufacturing cost.

Next, the starting device 2100 will be described.

The starting device 2100 includes a connecting pipe 310 connected to the fuel supply pipe 103 of the hydrocarbon reformer 2000, an on / off valve 300 installed at an end of the connecting pipe 310, and the on The ignition pipe 316 is installed on the other side of the connection pipe 310 in the off-valve 300 and a fuel pipe 312 for supplying fuel to the connection pipe (310).

Thus, the connection pipe 310 is connected to the ignition pipe 316 and the fuel pipe 312, respectively, between the connection pipe 310 and the ignition pipe 316 the on-off valve 300 Will be placed.

The ignition tube 316 is in contact with the atmosphere. Therefore, when the on-off valve 300 is turned on, the fuel gas supplied from the fuel pipe 312 has a pressure higher than atmospheric pressure, and the fuel supply pipe 103 side of the hydrocarbon reformer 2000 is fine. Since entering of fuel gas is more difficult than the ignition pipe 316 due to a flow path, the fuel gas does not flow into the fuel supply pipe 103 and moves to the ignition pipe 316.

An ignition unit is installed in the ignition tube 316, and the ignition coating 314 or a known electric ignition device (not shown) installed on the inner wall surface of the ignition tube 316 may be used as the ignition unit.

In the embodiment of the present invention, the ignition catalyst 314 for igniting the fuel gas flowing into the inner wall surface of the ignition pipe 316 is coated. Therefore, when the fuel gas flows into the ignition pipe 316, ignition occurs, and the ignition state is propagated to the fuel pipe 312 side.

The complexing catalyst 314 is undercoated ZrO ₂ on the surface of the FeCrAlloy fiber woven wool by sol-gel method, and calcined at 900 ° C. for 10 hours to form a support of the catalyst component, and on the upper part thereof, 0.1 wt% of platinum is dried and dried. It was prepared by firing (air atmosphere 800 ° C., 10 hours).

When the ignition catalyst 314 is coated on the inner wall surface of the ignition tube 316 to use a gas containing a small amount of hydrogen in the fuel, the sixth and seventh microchannels 165 and 175 of the combustion heat exchange plates 160 and 170 are used. The oxidation catalyst coating process may be omitted.

In particular, the effect of arranging the ignition catalyst 314 according to the present invention in the ignition pipe 316, that is, the effect on the positioning of the ignition point is a completely different result from the configuration of placing the ignition catalyst in the exhaust gas outlet 253 Seems. That is, when the ignition catalyst is located in the exhaust gas outlet 253, the ignition point moves to the initial mixing point of fuel and air so that the ignition point is moved to a single surface on the surface of the plates 160, 170, 210, 230 to prevent cooling of the ignition frame. Reduction of heat transfer area is inevitable because the size of the microfluidic channel must be greater than or equal to a quenching distance. Therefore, in order to maximize the heat transfer efficiency, it is preferable to place the ignition point in the ignition tube 316 as in the present invention, and to keep the groove diameter of the micro channel smaller.

The support of the complexing catalyst 314 may be manufactured using ceramics in the form of particles, tubes, or rods.

The hydrocarbon reformer 3000 according to the embodiment of the present invention is basically configured as described above. Hereinafter, the operation of the hydrocarbon reformer 3000 will be described.

The source gas supply source and the air supply source are respectively connected to the source supply pipe 254 and the air supply pipe 101 to the hydrocarbon reformer 2000, and the fuel gas supply source is connected to the fuel pipe 312 of the starter 2100. In addition, a thermocouple (not shown) was installed in the reformed gas temperature measuring tube 104 and the source gas temperature measuring tube 252 to perform reactor heating and reforming reactions.

First, the movement path of air is as follows. The air introduced into the air supply pipe 101 is supplied into the air inlet pipe formed by the first to fourth air supply holes 111, 121, 131, and 141. In addition, the air in the air inlet pipe passes through the first and third microchannels 115 and 135 of the air preheating plates 110 and 130, and is supplied to the combustion pipes formed by the first to seventh combustion holes 113, 123, 133, 143, 153, 163 and 173 to be mixed with fuel. . At this time, the lower portion of the air inlet pipe is closed by the upper flow path isolation plate 150. In particular, air is preheated by heat conducted from the reformed gas cooling plates 120 and 140 alternately stacked with the air preheating plates 110 and 130 while passing through the first and third microchannels 115 and 135.

Next, the fuel path is as follows. Fuel gas supplied from a fuel supply source is supplied to the connection pipe 310 through the fuel pipe 312. At this time, the fuel gas supplied may be hydrogen, hydrocarbon, or a mixture thereof, and the fuel gas may be ignited at room temperature.

Since the on-off valve 300 is opened in the starting state, the fuel gas moves to the ignition pipe 316 and is ignited by the ignition catalyst 314 as described above. Ignition of the fuel gas is propagated to the inside of the connecting pipe 310, in this state the on-off valve 300 is closed. Thereafter, the gaseous fuel supplied to the fuel supply pipe 103 through the fuel pipe 312 and the connection pipe 310 is ignited by the ignition catalyst 105 coated in the fuel supply pipe 103. While passing through the combustion pipe in the through to reach the combustion heat exchange plates (160, 170) in the resulting exhaust gas state. The high-temperature exhaust gas containing combustion heat by combustion is exhausted by the sixth through fourteenth exhaust gas distribution holes 161, 171, 181, 191, 201, 211, 221, 231, and 241 through the sixth and seventh micro-channels 165 and 175 of the combustion heat exchange plates 160 and 170. The lower plate passes through the gas supply pipe, passes through the exhaust gas distribution pipe formed by the eleventh through fourteen exhaust gas discharge holes 213, 223, 233, and 243 through the eleventh and thirteen minute flow paths 215 and 235 of the waste heat recovery plates 210 and 230. It is discharged to the exhaust gas discharge pipe 253 of 250. The exhaust gas supply pipe is closed at an upper portion by the upper flow passage isolation plate 150, and a lower portion is closed at an upper surface of the lower plate 250.

In addition, the movement paths of the source gas and the reformed gas are as follows. First, raw material gas is supplied through the raw material supply pipe 254, and the raw material gas is supplied through the raw material gas inlet pipes formed by the eleventh through fourteenth raw material gas supply holes 214, 224, 234 and 244. Preheated while passing through the twelfth and fourteenth microchannels 225 and 245. At this time, the preheating of the source gas is the heat conduction of the residual heat of the exhaust gas passing through the eleventh and thirteenth micro-channels 215 and 235 of the waste heat recovery plates 210 and 230 through the source gas passing through the twelfth and fourteenth micro-channels 225 and 245. It is supplied through. The ninth micro-channel 195 is supplied through the source gas distribution pipe formed by the ninth through fourteenth source gas distribution holes 192, 202, 212, 222, 232, and 242. The upper side of the source gas inlet pipe is closed by the lower flow passage isolation plate 200, and the upper side of the source gas distribution pipe is closed by the catalyst holder plate 190.

Since the ninth microchannel 195 is in contact with the reforming catalyst 185, a reformed gas is formed through a reforming reaction in a space formed by the ninth microchannel 195 and the reforming catalyst 185. The generated reformed gas passes through the second and fourth minute flow paths 125 and 145 of the reformed gas cooling plates 120 and 140 through reformed gas distribution pipes formed by the first to ninth reformed gas distribution holes 114, 124, 134, 144, 154, 164, 174, 184 and 194. The reformed gas cooled while passing through the second and fourth microchannels 125 and 145 passes through a reformed gas outlet hole formed by the first to fourth reformed gas discharge holes 112, 122, 132, and 142 to reformate gas of the upper plate 100. The discharge pipe 102 is discharged. The lower side of the reformed gas distribution pipe is closed by the lower flow passage isolation plate 200, and the lower side of the reformed gas outlet pipe is closed by the upper flow passage isolation plate 150.

In addition, since the reformed gas temperature measuring tube 104 communicates with the reformed gas distribution tube, the reformed gas temperature measuring tube 104 may measure the temperature of the reformed gas before it is cooled by a thermocouple not shown therein. Since the reformed gas temperature measuring tube 104 is closed, there is no leakage of the reformed gas through the reformed gas temperature measuring tube 104.

In addition, since the source gas temperature measuring tube 252 communicates with the source gas distribution tube, it is possible to measure the temperature of the source gas after being preheated by a thermocouple not shown therein. Since the source gas temperature measuring tube 252 is closed, there is no leakage of the reformed gas through the source gas temperature measuring tube 252.

As described above, it has been described with reference to a preferred embodiment of the present invention, but those skilled in the art various modifications and changes to the present invention without departing from the spirit and scope of the invention described in the claims below I can understand that you can.

[Experimental Example]

Hereinafter, a heating experiment of a hydrocarbon reformer 3000 using a microfluidic heater having a starting device according to an embodiment of the present invention will be described.

The temperature change at each position of the reactor was measured while supplying 2000 ml / min of air and 800 ml / min of hydrogen. In the initial ignition, the on-off valve 300 is opened to supply the mixed gas of hydrogen and air, which is fuel gas, to the ignition tube 316 so that the mixed gas of hydrogen and air contacts the ignition catalyst 3145 to ignite hydrogen. Then, the on-off valve 300 was closed to switch the flow direction of the mixed gas to the hydrocarbon reformer 2000 to heat the hydrocarbon reformer 2000.

According to the fuel supply time, the temperature change for each position of the reactor was rapidly increased in temperature during the initial 1 hour, as shown in FIG. As a result of analyzing the combustion efficiency by measuring the hydrogen concentration (gas chromatography) in the combustion exhaust gas, the combustion efficiency of hydrogen was 99.99%. In this way, a stable oxidation reaction of hydrogen was able to proceed through the structure in which a separate fuel combustion catalyst was not coated in the reactor. For faster heating, faster heating can be achieved by increasing the initial supply of air and hydrogen, and then using a control technique (PID control) that gradually reduces after a period of time. In addition, it can be adjusted through the addition or subtraction of the final fuel supply to lower or increase the reactor final temperature.

10: reformer 20: carbon monoxide aqueous reactor
30: hydrogen separation device 40: combustor
100: upper plate 101: air supply pipe
102: reforming gas discharge pipe 103: fuel supply pipe
104: reforming gas temperature measuring tube
110,130: air preheating plate 111: first air supply hole
112: first reformed gas discharge hole 113: first combustion hole
114: first reformed gas distribution hall 115: first micro-channel
120, 140: reforming gas cooling plate 121: second air supply hole
122: second reformed gas discharge hole 123: second combustion hole
124: second reformed gas distribution hole 125: the second micro-channel
131: third air supply hole 132: third reformed gas discharge hole
133: third combustion hole 134: third reformed gas distribution hole
135: third fine flow path 141: fourth air supply hole
142: fourth reformed gas discharge hole 143: fourth combustion hole
144: fourth reformed gas distribution hall 145: fourth micro-channel
150: upper flow path isolation plate 153: fifth combustion hole
154: fifth reformed gas distribution hole 160, 170: combustion heat exchange plate
161: sixth exhaust gas distribution hole 162: sixth idle hole
163: sixth combustion hole 164: sixth reforming gas distribution hole
165: sixth minute flow path 171: seventh exhaust gas distribution hole
172: seventh idle hole 173: seventh combustion hole
174: seventh reformed gas distribution hall 175: seventh minute flow path
180: catalyst plate 181: eighth exhaust gas distribution hole
184: 8th reforming gas distribution hall 185: reforming catalyst
190: reforming reaction plate 191: 9th exhaust gas distribution hole
192: ninth source gas distribution hole 193: ninth idle hole
194: 9th reforming gas distribution hall 200: lower flow path isolation plate
201: 10th exhaust gas distribution hole 202: 10th source gas distribution hole
210,230: waste heat recovery plate 211: 11th exhaust gas distribution hole
212: 11th source gas distribution hole 213: 11th exhaust gas discharge hole
214: Eleventh source gas supply hole 215: Eleventh minute flow path
220,240: reforming preheating plate 221: 12th exhaust gas distribution hole
222: 12th source gas distribution hole 223: 12th exhaust gas discharge hole
224: 12th source gas supply hole 225: 12th micro-channel
231: 13th exhaust gas distribution hole 232: 13th source gas distribution hole
233: thirteenth exhaust gas discharge hole 234: thirteenth raw material gas supply hole
235: thirteenth minute flow path 241: fourteenth exhaust gas distribution hole
242: 14th source gas distribution hole 243: 14th exhaust gas discharge hole
244: 14th source gas supply hole 245: 14th fine flow path
250: lower plate 252: raw material gas temperature measuring tube
253: exhaust gas discharge pipe 254: raw material gas supply pipe
300: on-off valve 310: connector
312: fuel line 314: ignition catalyst
316: ignition tube

Claims (5)

A hydrocarbon reformer in which a plurality of heating plates and reforming plates having a fine flow path are formed to be reformed by heat exchange with combustion heat generated by supplying air and fuel gas and contact with a reforming catalyst; And
A starter connected to the hydrocarbon reformer to supply fuel gas and ignite the fuel gas at startup;
The starting device,
A connecting tube having one side connected to the hydrocarbon reformer;
A fuel pipe communicating with a fuel supply source and said connection pipe;
An ignition tube installed on the other side of the connection tube and having an ignition portion therein; And
Hydrocarbon reformer using a micro-channel heater comprising an on-off valve disposed between the ignition pipe and the connecting pipe.
An upper plate having an air supply pipe connected to an air supply source to supply air, a fuel supply pipe connected to a starter connected to the fuel supply source, and a generated reformed gas discharge pipe; And
A lower plate connected to a raw material supply source and configured to supply a raw material gas and a generated exhaust gas discharge pipe;
An air preheating unit installed at a lower portion of the upper plate and alternately stacking a heating plate and a reforming plate for pre-heating the air supplied from the air supply pipe by the residual heat of the reforming gas and mixing and combusting the complexed fuel;
An upper flow passage isolation plate installed below the air preheating unit and passing only the exhaust gas and the reformed gas;
A heating plate disposed below the upper flow passage isolation plate, the heating plate conducting combustion heat of the exhaust gas, a catalyst holder plate in contact with the lower side of the heating plate, and installed to expose a reforming catalyst to the lower side; and a lower portion of the catalyst holder plate. A reforming reaction part installed at the reforming reaction part having a reforming plate for contacting the raw material gas in a horizontal direction with the reforming catalyst;
An upper flow path separation plate installed below the reforming reaction unit and configured to pass only the exhaust gas and the preheated raw material gas passing through the reforming reaction unit; And
A reforming preheating unit installed at a lower portion of the upper flow passage isolation plate and preheating the source gas to exhaust gas passing through the reforming reaction unit and a reforming preheating unit alternately arranged;
Fine flow paths are formed on the heating plate and the upper surface of the reforming plate, respectively.
The starting device,
A connection pipe having one side connected to the fuel supply pipe;
A fuel pipe communicating with a fuel supply source and said connection pipe;
An ignition tube installed on the other side of the connection tube and having an ignition portion therein; And
Hydrocarbon reformer using a micro-channel heater comprising an on-off valve disposed between the ignition pipe and the connecting pipe.
The hydrocarbon reformer of claim 1 or 2, wherein the fuel gas is any one of hydrogen and a hydrocarbon or a mixture thereof.
3. The hydrocarbon reformer of claim 1 or 2, wherein the ignition unit is a ignition catalyst installed in the ignition pipe.
3. The hydrocarbon reformer of claim 1 or 2, wherein the ignition unit is an electric ignition device installed in the ignition pipe.

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