KR102315444B1 - A catalytic performance test system - Google Patents

Abstract

The present invention relates to a catalyst performance evaluation system which can evaluate the performance of a catalyst for each exhaust situation by creating conditions suitable for an exhaust environment according to power generation facilities and ships, and can facilitate desorption of a catalyst by installing a reaction unit having a slide structure. The system comprises: an inline heater unit that heats incoming air to a preset temperature; respective injection units for injecting a harmful gas and a reducing agent; a mixing unit installed at the rear end of the inline heater unit, connected to the respective injection units, and mixing the injected harmful gas, the reducing agent, air heated to the preset temperature, and water vapor to discharge the mixed gas; a reaction unit for removing harmful gases by reacting the mixed gas discharged from the mixing unit with a catalyst; and an analysis unit that analyzes the catalyst performance by analyzing the components and concentrations of the mixed gas remaining in the reaction unit. The inline heater unit, the mixing unit, and the reaction unit are continuously arranged in the longitudinal direction and connected, and the reaction unit may be provided in a slide structure to desorb the catalyst therein.

Description

A catalytic performance test system

The present invention relates to a catalyst performance evaluation system.

More specifically, it is a system for evaluating the performance of catalysts used when removing harmful gases from exhaust gases emitted from power plants and ships. It relates to a catalyst performance evaluation system capable of evaluating and facilitating desorption of a catalyst by providing a reaction unit having a slide structure.

Catalysts are substances other than reactants in a chemical reaction that change only the reaction rate without changing quantitatively or qualitatively before and after the reaction. Catalysts are being used in various fields such as hydrogen reforming for fuel cells, purification systems for power plants and automobile exhaust gases, and various chemical catalytic reaction experiments by using these properties.

Exhaust gases emitted from power plants, ships, and vehicles contain nitrogen oxides (NOx). Nitrogen oxides (NOx) are mainly generated during combustion of fossil fuels, and selective catalytic reduction (SCR) is mainly used as a method of removing nitrogen oxides. (hereinafter referred to as a prior patent).

The prior patent discloses a feature of using a catalyst to remove harmful exhaust gas, but a method for evaluating catalyst performance is not disclosed. The composition and concentration of exhaust gas, such as nitrogen oxide, generated by a high-temperature combustion reaction varies greatly depending on the type of fuel used and combustion conditions, and this is closely related to catalyst performance.

Therefore, for catalyst performance test and efficient catalyst maintenance, it is necessary to control factors such as exhaust gas composition, concentration and temperature, and reducing agent input in an environment similar to the actual use environment when evaluating catalyst performance.

Accordingly, there is a need for a catalyst performance evaluation system capable of researching and developing catalysts with excellent performance by evaluating the performance of the catalyst by controlling the reaction conditions according to various variables according to the experimental conditions such as the desired flow rate, temperature, and pressure. In addition, a compact structure is required in consideration of cost, space security, and convenience of maintenance when constructing the system.

In addition, the catalyst is provided in the reactor, but may be provided in a detachable form for cleaning, repair, repair or replacement. However, in the prior patent, in order to desorb the catalyst from the reactor, it is inconvenient to separate the reactor and other components coupled to the reactor, and to reassemble the catalyst after desorption.

1. Korea Patent Publication No. 2011-0116446 (2011.10.26)

An object of the present invention is to create a mixed gas corresponding to the actual exhaust gas by creating the same environment as the actual exhaust gas emitted from a power plant, ship, vehicle, etc., and pass the generated mixed gas through the catalyst to evaluate the performance of the catalyst. The purpose of this study is to provide a catalyst performance evaluation system that can be used for research and development of catalysts with excellent performance.

Another object of the present invention is to provide a catalyst performance evaluation system capable of facilitating desorption of a catalyst by forming a reaction unit in a slide structure.

Catalyst evaluation system according to an embodiment of the present invention for achieving the above object is an in-line heater unit for heating incoming air to a preset temperature, each injection unit for injecting harmful gas and a reducing agent, the in-line heater A mixing unit installed at the rear end of the unit and connected to each of the injection units to mix the injected harmful gas, the reducing agent, the air heated to the preset temperature, and water vapor to discharge the mixed gas, the mixture discharged from the mixing unit and a reaction unit for removing harmful gas by reacting the gas with the catalyst, and an analysis unit for analyzing the catalyst performance by analyzing the components and concentrations of the mixed gas remaining in the reaction unit, wherein the inline heater unit, the mixing unit and the reaction unit have a length Doedoe continuously arranged and connected in the direction, the reaction unit is provided in a slide structure so that the catalyst can be desorbed therein.

In addition, the reaction unit includes a reactor provided with the catalyst, a connecting pipe having a hollow in which the mixed gas can move, and a cylinder coupled to a lower portion of the connecting pipe and movable in a direction spaced apart from the reactor, A first flexible tube having a first connection part and a second connection part provided at both ends of the reactor, a hollow in which the mixed gas can move, and expanding and contracting according to the movement of the cylinder, and provided between the first connection part and the rear end of the mixing part and a second flexible tube coupled to the rear end of the second connection part, and a slide part that supports the reactor and slides in a direction perpendicular to the longitudinal direction of the reactor.

In addition, the harmful gas becomes NO _X and SO ₂ , the reducing agent becomes NH ₃ , and further includes a nitrogen injection unit connected in parallel with each injection unit, and N ₂ is injected into the nitrogen injection unit after the catalytic reaction to remain gas can be removed.

In addition, the blower for introducing the air, the evaporator for evaporating water, the in-line heater unit, the mixing unit and the reaction unit further comprises a plurality of sensors (a to e) for measuring the temperature, pressure and flow rate, the analysis unit, By checking the measured temperature, pressure, and flow rate for each section, it is possible to control the driving conditions of the blower, the in-line heater unit, the injection unit, and the evaporator to be controlled under preset conditions.

In addition, the connecting pipe support part is fixedly coupled to the lower part of the connecting pipe by forming a saw tooth on the upper end, and the lower end is coupled to the cylinder, so that heat by the mixed gas moving through the connecting pipe is transferred to the lower part of the connecting pipe support part It is possible to prevent transmission to the cylinder coupled to the

As described above, the catalyst evaluation performance system of the present invention secures reliable results by evaluating the catalyst performance according to various variables, and can be utilized for research on chemical reaction experimental catalysts, power plants, and exhaust gas reduction technology of ships and vehicles. there is an advantage

In addition, the high-efficiency in-line heater unit, mixing unit and reaction unit continuously arranged in the longitudinal direction can be installed in parallel in multiple stages and connected to one analyzer, so that the structure of the entire system can be compact and configured, and multiple reactors can be operated simultaneously can do.

In addition, the desorption of the catalyst can be facilitated by forming the reaction unit in a left and right cylinder structure and a slide structure.

In addition, by forming a tooth on the upper end of the connecting pipe support of the reaction unit and fixing it to the lower part of the connecting pipe, it is possible to prevent heat from the mixed gas moving through the connecting pipe from being transmitted to the cylinder coupled to the lower part of the connecting pipe support. have.

1 is a view showing a schematic configuration of a catalyst performance evaluation system according to an embodiment of the present invention;
2 is a front view of the catalyst performance evaluation system of FIG. 1;
3 is a front view of a catalyst performance evaluation system according to another embodiment of the present invention;
4 and 5 are views for explaining the configuration of the heater unit of FIG. 2;
Figure 6 is a perspective view for explaining the reaction unit of Figure 2;
7 is an exploded perspective view of the first connection part and the second connection part of FIG. 2;
8 is a view for explaining the movement of the first connection part and the second connection part of FIG. 6;
FIG. 9 is a view for explaining a sliding operation of the slide unit of FIG. 6 .

Hereinafter, the catalyst performance evaluation system according to the present invention will be described in detail together with the accompanying drawings.

1 is a diagram showing a schematic configuration of a catalyst performance evaluation system according to an embodiment of the present invention. Also, FIG. 2 is a front view of the catalyst performance evaluation system of FIG. 1 .

1 and 2 , the catalyst performance evaluation system according to an embodiment of the present invention includes an inline heater unit 110 , a plurality of injection units 120 : 120a ~ 120c , 121 , a mixing unit 130 , and an evaporator. 140 , a reactor 150 and an analyzer 190 , and an air supply unit 10 and a blower 20 are installed at the front end of the inline heater unit 110 , and a water tank 30 is installed in the evaporator 140 . And the pure water production device 40 may be connected.

Here, the inline heater unit 110, the mixing unit 130, and the reactor 150 are disposed in the longitudinal direction and connected to each other in a line, so that the air introduced by the blower 20 flows into the heater unit 110, the mixing unit ( 130) and the reactor 150 have a structure that can be moved sequentially, and can be supported by the support (1).

Hereinafter, according to the flow of air introduced by the blower 20 in the description of the drawings, the inlet portion through which air is introduced from the heater unit 110 , the mixing unit 130 and the reactor 150 becomes the tip, and the air The outflow outlet may be the rear end.

In addition, the catalyst performance evaluation system may install a temperature sensor, a pressure sensor, a flow meter, etc. at a preset position for monitoring and controlling the temperature, pressure, flow rate, etc. of each section. In this case, a plurality of temperature sensors and pressure sensors may be installed at positions a to e of FIG. 2 , and sensing values measured at each position may be collected and analyzed by the analysis unit 190 and monitored. At this time, the analysis unit 190 controls the driving conditions of the blower 20 , the inline heater unit 110 , the injection unit 120 , and the evaporator 140 so as to be a preset condition according to the monitored sensing value, so that the Temperature, pressure, flow rate, etc. can be controlled.

In addition, as shown in FIG. 3, the catalyst performance evaluation system of the present invention installs a high-efficiency in-line heater unit 110, a mixing unit 130, and a reaction unit 150 continuously arranged in the longitudinal direction in parallel in multiple stages, and one analyzer It can be connected to 190, so that the structure of the entire system can be made compact, and a plurality of reactors 151 can be operated simultaneously.

The catalyst performance evaluation system according to an embodiment of the present invention creates the same environment as the actual exhaust gas emitted from a power plant, ship, vehicle, etc., generates a mixed gas corresponding to the actual exhaust gas, and applies the generated mixed gas to the catalyst. The performance of the catalyst can be evaluated by passing it through.

At this time, in order to generate a mixed gas corresponding to the actual exhaust gas, the catalyst performance evaluation system according to an embodiment of the present invention transfers the air supplied from the air supply unit 10 to the inline heater unit 110 through the blower 20 . supply, and the inline heater unit 110 may heat the air to a preset high temperature. Here, the heated air is moved to the mixing unit 130 .

The inline heater unit 110 may include a plurality of unit heaters, and may generate high heat by rapidly heating the air passing through the interior to a high temperature (500° C. or higher).

Here, the plurality of unit heaters may be configured as shown in FIGS. 4 and 5 . 4 is a longitudinal cross-sectional view showing the configuration of the unit heater, and FIG. 5 is a cross-sectional view showing the configuration of the unit heater.

4 and 5, the unit heater has an open form from one end to the other end, for example, a cylindrical case, a quartz formed with a relatively small diameter with respect to the case and arranged coaxially with the case, An insulator mounted inside one end and the other end of the case, a thermocouple disposed on the outside of the insulator, respectively, and a hot wire supported by the insulator while connecting the thermocouples at one end and the other end and installed inside the case.

In addition, the injection unit 120 includes a first injection unit 120a into which _{NO X} is injected, a second injection unit 120b into which _{SO 2} is injected, and a third injection unit 120c into which _{NH 3 as a reducing agent is injected.} can do. In addition, a nitrogen injection unit 121 connected in parallel to the plurality of injection units 120a to 120c may be further provided. When the catalyst performance evaluation is completed, N ₂ may be injected into the nitrogen injection unit 121 to remove residual gas remaining in the plurality of injection units 120 .

1 and 2 , the high-temperature air heated by the in-line heater unit 110 may be supplied to the mixing unit 130 . The mixing unit 130 mixes the heated air, N0 _X , S0 ₂ , NH ₃ injected through the injection unit 120 , and water vapor supplied from the evaporator to generate a mixed gas of the same environment as the actual exhaust gas. .

The mixing unit 130 may be installed at the rear end of the inline heater unit 110 and may be connected to each of the injection units 120 ( 120a to 120c ) for injecting harmful gases and reducing agents. Also, the mixing unit 130 may receive water vapor supplied from the evaporator 140 .

Here, the harmful gas may be nitrogen oxide (NOx) and sulfur dioxide (S0 ₂ ), and the reducing agent may be ammonia (NH ₃ ).

The mixing unit 140 mixes the harmful gas injected through the respective injection units 120a to 120c, the reducing agent, the air heated to a preset temperature supplied from the heater unit 110, and the water vapor supplied from the evaporator 140 . Thus, the mixed gas can be discharged.

The mixing unit 140 _{may be provided with a blade so that N0 X} , S0 ₂ , NH ₃ , heated air and water vapor can be evenly mixed. At this time, a vortex is generated by forming the rear end of the blade inclined at 45 degrees, so that N0 _X , S0 ₂ , NH ₃ , heated air and water vapor can be evenly mixed well. The mixed gas mixed in the mixing unit 140 may be moved to the reaction unit 150 .

The reaction unit 150 may remove the harmful gas by reacting the mixed gas discharged from the mixing unit 140 with the catalyst, and the catalyst may be easily desorbed through the left and right cylinder structure and the slide structure of the reactor 151 . .

FIG. 6 is a perspective view for explaining the reaction unit of FIG. 2 . 6, the reaction unit 150 includes a reactor 151, a first connection unit 160a and a second connection unit 160b, a first flexible pipe 170a and a second flexible pipe 170b, and a slide unit ( 180) may be included.

A catalyst is provided in the reactor 151, and a fixed type low-pressure differential catalyst such as a honeycomb type catalyst or a plate type catalyst may be used as the catalyst.

The first connection part 160a and the second connection part 160b are installed at both ends of the reactor 151 , and may be coupled by the fixing pill 50 . Specifically, the first connecting portion 160a may have a front end connected to the rear end of the first flexible tube 170a and a rear end connected to the front end of the reactor 151 . In addition, the second connecting portion 160b may have a front end connected to the rear end of the reactor 151 and a rear end connected to the rear end of the second flexible tube 170b.

7 is an exploded perspective view of the first connection part and the second connection part of FIG. 2 . FIG. 8 is a view for explaining the movement of the first connection part and the second connection part of FIG. 2 . 6 to 8 , the first connection part 160a and the second connection part 160b may include a connection pipe 161 , a connection pipe support part 162 , and a cylinder 163 , respectively. On the other hand, in order to move the first connection part 160a and the second connection part 160b, the fixing pin 50 may be released.

The connection pipe 161 is a hollow pipe through which the mixed gas can move, and a passage through which the mixed gas moved from the first flexible pipe 170a can move to the reactor 151 and the second flexible pipe 170b is formed. can provide

The connector support 162 may be fixedly coupled to the lower portion of the connector 161 to support the connector 161 . In addition, the connector support 162 is coupled to the cylinder 163 so that the position may be changed to correspond to the change of the cylinder 163 according to the manipulation of the levers 164a and 164b.

At this time, the connecting pipe support 162 is fixedly coupled to the lower portion of the connecting pipe 161 by forming teeth on the upper end, and the lower end is coupled to the cylinder 163 . The connector support 162 is coupled to the connector 161 in a sawtooth shape, thereby minimizing the contact area at the time of coupling, so that heat by the mixed gas moving through the connector 161 is at the lower portion of the connector support 162 . It is possible to minimize the transmission to the coupled cylinder (163).

The cylinder 163 may include a piston part 163a, a cylinder rod part 163b, a first fixing frame 163c, and a second fixing frame 163d. At this time, the piston part 163a may be provided with an insertion groove 60 ′ into which the cylinder rod part 163b is inserted and movable, and a hollow 62 through which the guide rod 62 is inserted to guide the movement.

In addition, the cylinder rod part 163b may be provided with a cylinder rod 60 and a guide rod 62 to which the space separation frame 61 is connected. In addition, the first fixing frame (163c) is coupled to the connection and the support portion (162) and the cylinder rod portion (163b) is fixed. In addition, the second fixing frame (163d) is fixedly coupled to the piston portion (163a) and the support (1).

The insertion groove 60' of the piston part 163a is separated into two spaces by the space separation frame 61 of the cylinder rod part 163b, and according to the inflow and outflow of air supplied to each space, the cylinder rod 60 is The position is variable so that the connecting pipe 161 , the connecting pipe supporting part 162 , and the first fixing frame 163 can be moved to correspond to the variable position of the cylinder rod 60 .

In this case, the levers 164a and 164b may be connected to the first connection part 160a and the second connection part 160b one by one, and may be an air valve for supplying air to the cylinder 163 . As air is supplied to the space of the piston part 163a preset according to the position of the lever, the first connection part 160a and the second connection part 160b may be moved in one direction and the other direction.

Referring to FIG. 8, the cylinder rod 60 is a connecting pipe connected to the connecting pipe support 162 between the end position P1 of the reactor 151 and the position P2 spaced apart from the reactor 151 by a preset interval ( 161) can be moved. At this time, in FIG. 8 , it can be seen that the reactor 151 has moved from the end position P1 to the position P2 spaced apart from the reactor 151 by a preset interval.

At this time, the cylinder 163 is connected to the levers 164a and 164b, and air is introduced according to the operation of the lever to change the position of the cylinder rod, thereby changing the position of the connecting pipe support 162 . The position of the connector 161 fixed to the connector support 162 is also varied according to the change in the position of the connector support 162 .

The first flexible pipe 170a and the second flexible pipe 170b are provided with a hollow in which the mixed gas can move, and the force (impact) applied according to the positional movement of the first connecting part 160a and the second connecting part 160b. ) may be provided in a flexible structure that can absorb.

One end of the first flexible tube 170a may be coupled to the rear end of the mixing unit 130 , and the other end may be coupled to the front end of the first connection unit 160a. In addition, the second flexible tube 170b may have one end connected to the rear end of the second connector 160b and the other end fixed to the support 1 .

The slide unit 180 supports the reactor 151 and slides in a direction perpendicular to the longitudinal direction of the reactor 151 to slide the reactor 151 in one direction.

FIG. 9 is a view for explaining a sliding operation of the slide unit of FIG. 2 . Referring to FIG. 9 , the slide unit 180 is installed on the lower side of the support unit 181 and the support unit 181 extending in the direction perpendicular to the reactor 151 from both lower sides of the reactor 151 to support the support unit 181 . A rail (not shown) provided with a fixing part 182 and a handle 183a for fixedly coupling the moving frame 183 and the supporting part 181 while supporting and installed on the support 1 according to the direction of the force applied to the handle 183a. City) may include a guide unit 184 fixed to the moving frame 183 and the support 1 to move along the moving frame 183 to move the moving frame 183.

As shown in Figure 9 (a), after the first connection portion (160a) and the second connection portion (160b) are spaced apart from the left and right of the reactor 151, slide by the direction (arrow) of the force applied to the handle (183a) As the part 180 slides, the reactor 151 coupled to the slide part 180 moves in one direction. As shown in (b) of FIG. 9 , the catalyst can be easily desorbed from the inside of the sliding reactor 151 . Thereafter, by sliding the reactor 151 in the reverse order in the reverse direction, and moving the cylinder to the original position, the first connection part 160a and the second connection part 160b are fixedly coupled to the reactor 151 with the fixing pin 50, respectively. have.

On the other hand, the front and rear ends of the reactor 151, that is, the first connection part 160a into which the mixed gas before the reaction in the reactor 151 is introduced and the second connection part 160b into which the mixed gas after the reaction in the reactor 151 is introduced. The performance of the catalyst may be analyzed by extracting each sample from the analysis unit 190 for comparative analysis.

Ammonia (NH ₃₎ is converted into water and nitrogen by reacting with nitrogen monoxide (NO) on the catalyst of the reactor 151, and unreacted ammonia (NH3 Slip) that does not react with nitrogen monoxide (NO) is analyzed by the analysis unit 190 In this case, as the catalytic activity decreases, unreacted ammonia (NH3 Slip) increases.

The embodiments described in this specification and the configurations shown in the drawings are only the most preferred embodiment of the present invention and do not represent all the technical spirit of the present invention, so various equivalents that can be substituted for them at the time of the present application It should be understood that there may be variations and examples.

110: heater unit 120 (120a ~ 120c): a plurality of injection units
121: nitrogen injection unit 130: mixing unit
140: evaporator
150: reactor
151: reactor 160a: first connection part
160b: second connector 161: connector
162: connector support 163: cylinder
163a: piston part 163b: cylinder rod part
163c: first fixed frame 163d: second fixed frame
164a, 164b: lever 170a: flexible tube
170b: second flexible tube
180: slide part
181: support 182: fixed part
183: moving frame 183a: handle
184: guide part
190: analysis unit

Claims (5)

an in-line heater unit 110 for heating the incoming air to a preset temperature;
Each injection unit 120 for injecting a harmful gas and a reducing agent containing nitrogen oxide and sulfur dioxide;
A mixture installed at the rear end of the inline heater unit 110 and connected to the respective injection units 120 to mix the injected harmful gas, the reducing agent, the air heated to the preset temperature, and water vapor to discharge the mixed gas part 130;
a reaction unit 150 for removing harmful gases by reacting the mixed gas discharged from the mixing unit 130 with a catalyst; and
and an analysis unit 190 for analyzing the catalyst performance by analyzing the components and concentrations of the mixed gas remaining in the reaction unit;
The in-line heater unit 110, the mixing unit 130 and the reaction unit 150 are continuously arranged and connected in the longitudinal direction, and the reaction unit 150 is provided in a slide structure to desorb the catalyst therein,
The reaction unit 150,
a reactor 151 provided with the catalyst;
A second pipe provided at both ends of the reactor, comprising a connecting pipe 161 having a hollow in which the mixed gas can move, and a cylinder 163 coupled to a lower portion of the connecting pipe and movable in a direction spaced apart from the reactor. a first connection part 160a and a second connection part 160b;
A first flexible pipe 170a provided between the rear end of the first connecting part 160a and the mixing part 130, which is provided with a hollow in which the mixed gas can move and expands and contracts according to the movement of the cylinder 163, and a second flexible tube 170b coupled to the rear end of the second connector 160b; and
Catalyst performance evaluation system comprising a; supporting the reactor (151) and sliding in a direction perpendicular to the longitudinal direction of the reactor (151).
delete According to claim 1,
The reducing agent becomes NH ₃ ,
Further comprising a nitrogen injection unit 121 connected in parallel with each injection unit,
Catalyst performance evaluation system, characterized in that by injecting _{N 2} to the nitrogen injection part after the catalytic reaction to remove residual gas.
According to claim 1,
a blower 20 for introducing the air;
an evaporator 140 for evaporating water;
A temperature sensor, a pressure sensor, and a flow meter for measuring the temperature, pressure, and flow rate of the inline heater unit 110, the mixing unit 130 and the reaction unit 150, respectively; further comprising,
The analysis unit 190 checks the measured temperature, pressure, and flow rate for each section to control the blower 20, the inline heater unit 110, the injection unit 120 and the evaporator 140 under preset conditions. Catalyst performance evaluation system, characterized in that controlling the driving conditions.
According to claim 1,
The connector support 162 is,
A sawtooth is formed at the upper end to be fixedly coupled to the lower part of the connecting pipe 161 and the lower end is coupled to the cylinder 163, so that heat by the mixed gas moving through the connecting pipe 161 is transferred to the connecting pipe support part ( Catalyst performance evaluation system, characterized in that it is prevented from being transmitted to the cylinder 163 coupled to the lower part of the 162).

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