Dynamic series control full-size denitration catalyst performance evaluation system

Abstract

The invention discloses a dynamic series control full-size denitration catalyst performance evaluation system. The system comprises a catalyst reaction and control system, a flue gas analysis system, a gas distribution system and a flue gas purification device. The catalyst reaction and control system comprises a gas inlet pipeline, a gas exhaust pipeline, a plurality of reactors, a control valve assembly and a connecting pipeline assembly, and the flue gas analysis system is connected with the catalyst reaction and control system and is used for testing and analyzing the test gas taken by the flue gas sampling port. According to the full-size denitration catalyst performance evaluation system based on dynamic series control disclosed by the embodiment of the invention, connection and disconnection of each connecting pipeline are controlled through the control valve assembly, so that series connection between the reactors has dynamic adaptability and flexibility, and other reactors are allowed to continuously operate when a single reactor is overhauled offline; the reactors can be connected in series in any order, connected in series in any number of stages and tested in working condition activity in any number of stages.

Description

Technical Field

[0001] The present invention relates to the technical field of multi-dimensional performance detection and dynamic series control of coal-fired flue gas denitration catalysts, and in particular to a full-scale denitration catalyst performance evaluation system with dynamic series control. Background Art

[0002] Selective Catalytic Reduction (SCR) flue gas denitrification technology mainly refers to the use of NH3 reducing agent to reduce NO in flue gas at a specific temperature. x In the process of reducing to N2 and water, the catalyst, as a core component, is widely used due to its high denitration efficiency and strong stability. Among them, the denitration efficiency, activity and pressure drop are mainly tested using the full-scale SCR denitration catalyst performance evaluation system. However, the full-scale SCR denitration catalyst performance evaluation system in the relevant technology lacks dynamic adaptability and flexibility. When a certain stage of the reactor fails, the entire series system is interrupted, affecting the series experiment of denitration efficiency. Summary of the invention

[0003] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, one object of the present invention is to provide a full-scale denitration catalyst performance evaluation system with dynamic series control, which has good dynamic adaptability and flexibility when evaluating denitration catalysts.

[0004] A full-scale denitration catalyst performance evaluation system with dynamic series control according to an embodiment of the present invention includes:

[0005] The catalyst reaction and control system includes an intake pipeline, an exhaust pipeline, multiple reactors, a control valve assembly, and a connecting pipeline assembly. Each of the reactors has an inlet and an outlet, and a flue gas sampling port is provided at the inlet and outlet of each reactor. The multiple reactors include a primary reactor, a secondary reactor, a tertiary reactor, and a quaternary reactor. The inlet and outlet of the primary reactor are a first inlet and a first outlet respectively, the inlet and outlet of the secondary reactor are a second inlet and a second outlet respectively, the inlet and outlet of the tertiary reactor are a third inlet and a third outlet respectively, and the inlet and outlet of the quaternary reactor are a fourth inlet and a fourth outlet respectively. The first inlet, the second inlet, the third inlet, and the fourth inlet are connected to the intake pipeline through a first intake connecting pipeline, a second intake connecting pipeline, a third intake connecting pipeline, and a fourth intake connecting pipeline respectively. The first outlet, the second outlet, the third outlet, and the fourth outlet are connected to the exhaust pipeline through a first exhaust connecting pipeline, a second exhaust connecting pipeline, a third exhaust connecting pipeline, and a fourth exhaust connecting pipeline respectively. The first outlet is connected to the second inlet, the third inlet, and the fourth inlet through a first inlet-outlet connecting pipeline, a second inlet-outlet connecting pipeline, and a third inlet-outlet connecting pipeline respectively. The second outlet is connected to the third inlet and the fourth inlet through a fourth inlet-outlet connecting pipeline and a fifth inlet-outlet connecting pipeline respectively. The third outlet is connected to the fourth inlet through a sixth inlet-outlet connecting pipeline. The control valve assembly is used to control the on-off of each of the connecting pipelines.

[0006] A flue gas analysis system is connected to the catalyst reaction and control system, and the flue gas analysis system is used to test and analyze the test gas taken from the flue gas sampling port.

[0007] A gas distribution system is connected to the intake pipeline to provide test gas for the intake pipeline.

[0008] A flue gas purification device is connected to the exhaust pipeline to purify and discharge the test gas after catalytic treatment in the exhaust pipeline.

[0009] The full-scale denitration catalyst performance evaluation system with dynamic series control according to the embodiment of the present invention controls the on-off of each of the connecting pipelines through the control valve assembly of the catalyst reaction and control system, making the series connection between the reactors have dynamic adaptability and flexibility, allowing the remaining reactors to continue running when a single reactor is offline for maintenance, and realizing the series connection of reactors in any order, the series connection of any number of stages, and the activity test of any number of stages of working conditions.

[0010] According to some embodiments of the present invention, the control valve assembly includes a first control valve, a second control valve, a third control valve, a fourth control valve, a fifth control valve, a sixth control valve, a seventh control valve, an eighth control valve, a ninth control valve, a tenth control valve, an eleventh control valve, a twelfth control valve, a thirteenth control valve, and a fourteenth control valve;

[0011] Wherein, the first control valve is arranged on the first intake connection pipeline, the second control valve is arranged on the second intake connection pipeline, the third control valve is arranged on the third intake connection pipeline, and the fourth control valve is arranged on the fourth intake connection pipeline;

[0012] The fifth control valve is arranged on the first exhaust connection pipeline, the sixth control valve is arranged on the second exhaust connection pipeline, the seventh control valve is arranged on the third exhaust connection pipeline, and the eighth control valve is arranged on the fourth exhaust connection pipeline;

[0013] The ninth control valve is arranged on the first inlet and outlet connection pipeline, the tenth control valve is arranged on the second inlet and outlet connection pipeline, the eleventh control valve is arranged on the third inlet and outlet connection pipeline, the twelfth control valve is arranged on the fourth inlet and outlet connection pipeline, the thirteenth control valve is arranged on the fifth inlet and outlet connection pipeline, and the fourteenth control valve is arranged on the sixth inlet and outlet connection pipeline.

[0014] According to some embodiments of the present invention, the fourth outlet is connected to the third inlet, the second inlet, and the first inlet through a seventh inlet and outlet connection pipeline, an eighth inlet and outlet connection pipeline, and a ninth inlet and outlet connection pipeline respectively, the third outlet is connected to the second inlet and the first inlet through a tenth inlet and outlet connection pipeline and an eleventh inlet and outlet connection pipeline respectively, and the second outlet is connected to the first inlet through a twelfth inlet and outlet connection pipeline.

[0015] According to some embodiments of the present invention, the control valve assembly includes a fifteenth control valve, a sixteenth control valve, a seventeenth control valve, an eighteenth control valve, a nineteenth control valve, and a twentieth control valve;

[0016] The fifteenth control valve is arranged on the seventh inlet and outlet connection pipeline, the sixteenth control valve is arranged on the eighth inlet and outlet connection pipeline, the seventeenth control valve is arranged on the ninth inlet and outlet connection pipeline, the eighteenth control valve is arranged on the tenth inlet and outlet connection pipeline, the nineteenth control valve is arranged on the eleventh inlet and outlet connection pipeline, and the twentieth control valve is arranged on the twelfth inlet and outlet connection pipeline.

[0017] According to some embodiments of the present invention, the control valve assembly further includes a twenty-first control valve. The intake pipeline and the exhaust pipeline are connected through a thirteenth inlet and outlet connection pipeline, and the twenty-first control valve is arranged on the thirteenth inlet and outlet connection pipeline.

[0018] According to some embodiments of the present invention, the flue gas sampling ports include an on-line flue gas sampling port and an off-line flue gas sampling port. The flue gas analysis system is used to test and analyze the test gas taken from the on-line flue gas sampling port. The sampling of the off-line flue gas sampling port satisfies the off-line test of the SO2 / SO3 conversion rate and NH3 escape.

[0019] According to some embodiments of the present invention, the gas distribution system includes a first gas distribution pipeline, a second gas distribution pipeline, a third gas distribution pipeline, a fourth gas distribution pipeline, a fifth gas distribution pipeline, a sixth gas distribution pipeline, and a seventh gas distribution pipeline. The first gas distribution pipeline is used to distribute N2, the second gas distribution pipeline is used to distribute air, the third gas distribution pipeline is used to distribute SO2, the fourth gas distribution pipeline is used to distribute NO, the fifth gas distribution pipeline is used to distribute NO2, the sixth gas distribution pipeline is used to distribute NH3, and the seventh gas distribution pipeline is used to distribute water vapor.

[0020] According to some embodiments of the present invention, the gas distribution system includes a primary mixer and a secondary mixer. The mixing inlet of the secondary mixer is connected to the mixing outlet of the primary mixer, and the mixing outlet of the secondary mixer is connected to the intake pipeline. The first gas distribution pipeline, the second gas distribution pipeline, the third gas distribution pipeline, the fourth gas distribution pipeline, and the fifth gas distribution pipeline are all connected to the mixing inlet of the primary mixer, and the sixth gas distribution pipeline and the seventh gas distribution pipeline are both connected to the mixing inlet of the secondary mixer.

[0021] According to some embodiments of the present invention, the gas distribution system includes a heater, a water supply device, and a nitrogen production device. The nitrogen production device includes a nitrogen generator and an air compressor. The nitrogen generator is used to supply N2 to the first gas distribution pipeline, and the air compressor is used to supply air to the second gas distribution pipeline. The heater is connected between the mixing outlet of the primary mixer and the mixing inlet of the secondary mixer, and the seventh gas distribution pipeline is connected to the heater to supply water vapor to the heater.

[0022] According to some embodiments of the present invention, the full-scale denitration catalyst performance evaluation system includes a gas-gas heat exchanger and a gas-water heat exchanger. In the gas flow direction in the exhaust pipeline, the gas-gas heat exchanger, the gas-water heat exchanger, and the flue gas purification device are arranged in sequence. The first gas distribution pipeline and the exhaust pipeline are both connected to the gas-gas heat exchanger, and the exhaust pipeline is connected to the gas-water heat exchanger.

[0023] Additional aspects and advantages of the present invention will be given in part in the following description, become apparent in part from the following description, or be learned through the practice of the present invention. Description of the Drawings

[0024] The above and / or additional aspects and advantages of the present invention will become apparent and be readily understood from the following description of embodiments in conjunction with the accompanying drawings, where:

[0025] Figure 1 is a schematic diagram of a full-scale denitration catalyst performance evaluation system with dynamic series control according to some embodiments of the present invention;

[0026] Figure 2 is Figure 1 a schematic diagram of the catalyst reaction and control system in

[0027] Figure 3 is a schematic diagram of the logical control of the catalyst reaction and control system according to some embodiments of the present invention.

[0028] Reference numerals:

[0029] 100, full-scale denitration catalyst performance evaluation system with dynamic series control;

[0030] 10, catalyst reaction and control system;

[0031] 11, intake pipeline; 111, first inlet; 112, second inlet; 113, third inlet; 114, fourth inlet;

[0032] 12, exhaust pipeline; 121, first outlet; 122, second outlet; 123, third outlet; 124, fourth outlet;

[0033] 13, reactor; 131, primary reactor; 132, secondary reactor; 133, tertiary reactor; 134, quaternary reactor;

[0034] 14, control valve assembly; 141, first control valve; 142, second control valve; 143, third control valve; 144, fourth control valve; 145, fifth control valve; 146, sixth control valve; 147, seventh control valve; 148, eighth control valve; 149, ninth control valve; 150, tenth control valve; 151, eleventh control valve; 152, twelfth control valve; 153, thirteenth control valve; 154, fourteenth control valve; 155, fifteenth control valve; 156, sixteenth control valve; 157, seventeenth control valve; 158, eighteenth control valve; 159, nineteenth control valve; 160, twentieth control valve; 161, twenty-first control valve;

[0035] 17. Connecting pipeline assembly; 171. First inlet and outlet connecting pipeline; 172. Second inlet and outlet connecting pipeline; 173. Third inlet and outlet connecting pipeline; 174. Fourth inlet and outlet connecting pipeline; 175. Fifth inlet and outlet connecting pipeline; 176. Sixth inlet and outlet connecting pipeline; 177. Seventh inlet and outlet connecting pipeline; 178. Eighth inlet and outlet connecting pipeline; 179. Ninth inlet and outlet connecting pipeline; 180. Tenth inlet and outlet connecting pipeline; 181. Eleventh inlet and outlet connecting pipeline; 182. Twelfth inlet and outlet connecting pipeline; 183. Thirteenth inlet and outlet connecting pipeline; 184. First intake connecting pipeline; 185. Second intake connecting pipeline; 186. Third intake connecting pipeline; 187. Fourth intake connecting pipeline; 188. First exhaust connecting pipeline; 189. Second exhaust connecting pipeline; 190. Third exhaust connecting pipeline; 191. Fourth exhaust connecting pipeline;

[0036] 20. Flue gas analysis system;

[0037] 30. Gas distribution system; 301. First gas distribution pipeline; 302. Second gas distribution pipeline; 303. Third gas distribution pipeline; 304. Fourth gas distribution pipeline; 305. Fifth gas distribution pipeline; 306. Sixth gas distribution pipeline; 307. Seventh gas distribution pipeline; 31. Primary mixer; 32. Secondary mixer; 33. Heater; 34. Water supply device; 35. Nitrogen production device;

[0038] 40. Flue gas purification device; 41. Gas-gas heat exchanger; 42. Gas-water heat exchanger. Detailed implementation manners

[0039] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present invention and should not be construed as a limitation to the present invention.

[0040] Reference is made below to Figures 1 - 3 describe a full-scale denitration catalyst performance evaluation system 100 with dynamic series control according to an embodiment of the present invention.

[0041] Referring to Figures 1 - 3 , a full-scale denitration catalyst performance evaluation system 100 with dynamic series control according to an embodiment of the present invention includes: a catalyst reaction and control system 10, a flue gas analysis system 20, a gas distribution system 30, and a flue gas purification device 40.

[0042] The catalyst reaction and control system 10 includes an intake pipeline 11, an exhaust pipeline 12, a plurality of reactors 13, a control valve assembly 14, and a connecting pipeline assembly 17. Each reactor 13 has an inlet and an outlet, and a flue gas sampling port is provided at the inlet and outlet of each reactor 13. The plurality of reactors 13 includes a primary reactor 131, a secondary reactor 132, a tertiary reactor 133, and a quaternary reactor 134. The inlet and outlet of the primary reactor 131 are a first inlet 111 and a first outlet 121 respectively, the inlet and outlet of the secondary reactor 132 are a second inlet 112 and a second outlet 122 respectively, the inlet and outlet of the tertiary reactor 133 are a third inlet 113 and a third outlet 123 respectively, and the inlet and outlet of the quaternary reactor 134 are a fourth inlet 114 and a fourth outlet 124 respectively.

[0043] Among them, the first inlet 111, the second inlet 112, the third inlet 113, and the fourth inlet 114 are connected to the intake pipeline 11 through a first intake connection pipeline 184, a second intake connection pipeline 185, a third intake connection pipeline 186, and a fourth intake connection pipeline 187 respectively. The first outlet 121, the second outlet 122, the third outlet 123, and the fourth outlet 124 are connected to the exhaust pipeline 12 through a first exhaust connection pipeline 188, a second exhaust connection pipeline 189, a third exhaust connection pipeline 190, and a fourth exhaust connection pipeline 191 respectively. The first outlet 121 is connected to the second inlet 112, the third inlet 113, and the fourth inlet 114 through a first inlet-outlet connection pipeline 171, a second inlet-outlet connection pipeline 172, and a third inlet-outlet connection pipeline 173 respectively. The second outlet 122 is connected to the third inlet 113 and the fourth inlet 114 through a fourth inlet-outlet connection pipeline 174 and a fifth inlet-outlet connection pipeline 175 respectively. The third outlet 123 is connected to the fourth inlet 114 through a sixth inlet-outlet connection pipeline 176. The control valve assembly 14 is used to control the on-off of each connecting pipeline.

[0044] The connecting pipeline assembly 17 includes a plurality of connecting pipelines. The plurality of connecting pipelines of the connecting pipeline assembly 17 includes a first intake connection pipeline 184, a second intake connection pipeline 185, a third intake connection pipeline 186, a fourth intake connection pipeline 187, a first exhaust connection pipeline 188, a second exhaust connection pipeline 189, a third exhaust connection pipeline 190, a fourth exhaust connection pipeline 191, a first inlet-outlet connection pipeline 171, a second inlet-outlet connection pipeline 172, a third inlet-outlet connection pipeline 173, a fourth inlet-outlet connection pipeline 174, a fifth inlet-outlet connection pipeline 175, and a sixth inlet-outlet connection pipeline 176.

[0045] Among them, the first inlet 111 is connected to the intake pipe 11 through the first intake connection pipe 184; the second inlet 112 is connected to the intake pipe 11 through the second intake connection pipe 185; the third inlet 113 is connected to the intake pipe 11 through the third intake connection pipe 186; the fourth inlet 114 is connected to the intake pipe 11 through the fourth intake connection pipe 187.

[0046] The first outlet 121 is connected to the exhaust pipe 12 through the first exhaust connection pipe 188; the second outlet 122 is connected to the exhaust pipe 12 through the second exhaust connection pipe 189; the third outlet 123 is connected to the exhaust pipe 12 through the third exhaust connection pipe 190; the fourth outlet 124 is connected to the exhaust pipe 12 through the fourth exhaust connection pipe 191.

[0047] The first outlet 121 is connected to the second inlet 112 through the first inlet-outlet connection pipe 171; the first outlet 121 is connected to the third inlet 113 through the second inlet-outlet connection pipe 172; the first outlet 121 is connected to the fourth inlet 114 through the third inlet-outlet connection pipe 173; the second outlet 122 is connected to the third inlet 113 through the fourth inlet-outlet connection pipe 174; the second outlet 122 is connected to the fourth inlet 114 through the fifth inlet-outlet connection pipe 175; the third outlet 123 is connected to the fourth inlet 114 through the sixth inlet-outlet connection pipe 176.

[0048] Among them, the intake pipe 11 is used to convey a mixture of flue gas and ammonia into the reactor 13, and the exhaust pipe 12 is used to discharge the flue gas treated by the reactor 13.

[0049] The reactor 13 is used to accommodate the denitration catalyst to be tested. Different reactors 13 can accommodate different denitration catalysts or the same denitration catalyst. Each reactor 13 has a pressure drop test function, and the data can be transmitted to the software system. The control temperature range of the reactor 13 is adjustable. For example, the control temperature range of the reactor 13 can be 50°C to 550°C, with an accuracy of ±2°C, and is equipped with a temperature monitoring and alarm thermocouple.

[0050] The control valve assembly 14 is used to control the on-off of each connection pipe in the connection pipe assembly 17. When the control valve assembly 14 is opened, the corresponding connection pipe can allow gas to flow in and out; when the control valve assembly 14 is closed, the corresponding connection pipe cannot allow gas to flow in and out. By controlling the on-off of each connection pipe through the control valve assembly 14, the series connection between the reactors 13 has dynamic adaptability and flexibility, allowing the remaining reactors 13 to continue operating when a single reactor 13 is offline for maintenance, and realizing the series connection of the reactors 13 in any order, any number of stages, and the activity test of any number of stages of working conditions.

[0051] For example, the user can input the series mode in the evaluation system. The evaluation system conducts path analysis to generate a corresponding valve operation sequence, and then executes the control valve assembly 14 to open or close the corresponding control valve. After verification by sensor feedback, a performance analysis test is carried out.

[0052] For example, the arbitrary sequential connection of the reactors 13 means that the gas transported by the inlet gas pipeline 11 can enter different reactors 13 in any order. It can be in the order of the first-stage reactor 131 - the second-stage reactor 132 - the third-stage reactor 133 - the fourth-stage reactor 134, or in the order of the third-stage reactor 133 - the fourth-stage reactor 134 - the first-stage reactor 131 - the second-stage reactor 132, etc. By connecting the reactors 13 in any order in series, the actual operating conditions of different power plants can be simulated, providing a guiding scheme for the stable operation of the denitration system. It can also test the best arrangement method of the denitration catalyst during operation. By supporting multi-mode testing of the catalyst, such as running alone, running in the first-stage reactor 13 / the middle-stage reactor 13 / the last-stage reactor 13, an activity-position correlation curve can be generated, and the performance differences of the catalyst in different-stage reactors 13 can be tested.

[0053] For example, the first-stage reactor 131, the third-stage reactor 133, and the fourth-stage reactor 134 can be connected in series by controlling the control valve assembly 14. At this time, with the second-stage reactor 132 in an offline state, the other reactors 13 can continue to operate. By connecting the reactors 13 in any number and order in series, online maintenance without shutting down can be achieved. If a certain first-stage reactor 131 fails, the other three reactors 133 can continue to be connected in series or operate individually. For example, when the catalyst in a certain reactor 13 fails, the denitration efficiency of the catalysts in the other two or three reactors 133 can be tested, avoiding delays in the test cycle caused by evaluation system failures.

[0054] The flue gas analysis system 20 is connected to the catalyst reaction and control system 10, and the flue gas analysis system 20 is used to test and analyze the test gas taken from the flue gas sampling port. The flue gas analysis system 20 can quickly measure the concentrations of various components in the flue gas, and the detected data is displayed locally and transmitted to the software system. For example, the inlets and outlets of four reactors 13 can be respectively aggregated by independent sampling pipelines to a high-temperature switching box, and then the high-temperature switching box distributes them to three flue gas outlets. One of them is led to the flue gas analysis system 20 by a sampling pipeline to realize online measurement of flue gas components, and the other two are for standby. Among them, the operating temperature of the high-temperature switching box is ≥220°C.

[0055] The gas distribution system 30 is connected to the inlet gas pipeline 11 to provide test gas for the inlet gas pipeline 11.

[0056] The flue gas purification device 40 is connected to the exhaust pipe 12 for purifying and discharging the test gas after catalytic treatment in the exhaust pipe 12. For example, the flue gas purification device 40 can be configured with a high-pressure blower and an SS316L stainless steel tail gas treatment device containing solid adsorbents to adsorb SO2, NH3, SO3, and NO x and other waste gases to prevent environmental pollution.

[0057] For the full-scale denitration catalyst performance evaluation system 100 with dynamic series control according to an embodiment of the present invention, the on-off of each connecting pipeline is controlled by the control valve assembly 14 of the catalyst reaction and control system 10, so that the series connection between the reactors 13 has dynamic adaptability and flexibility, allowing the remaining reactors 13 to continue operating when a single reactor 13 is taken offline for maintenance, and realizing the series connection of reactors 13 in any order, any number of series, and the activity test of any number of series operating conditions.

[0058] Refer to Figure 2 , according to some embodiments of the present invention, the control valve assembly 14 includes a first control valve 141, a second control valve 142, a third control valve 143, a fourth control valve 144, a fifth control valve 145, a sixth control valve 146, a seventh control valve 147, an eighth control valve 148, a ninth control valve 149, a tenth control valve 150, an eleventh control valve 151, a twelfth control valve 152, a thirteenth control valve 153, and a fourteenth control valve 154;

[0059] Among them, the first control valve 141 is arranged on the first intake connection pipeline 184, the second control valve 142 is arranged on the second intake connection pipeline 185, the third control valve 143 is arranged on the third intake connection pipeline 186, and the fourth control valve 144 is arranged on the fourth intake connection pipeline 187;

[0060] The fifth control valve 145 is arranged on the first exhaust connection pipeline 188, the sixth control valve 146 is arranged on the second exhaust connection pipeline 189, the seventh control valve 147 is arranged on the third exhaust connection pipeline 190, and the eighth control valve 148 is arranged on the fourth exhaust connection pipeline 191;

[0061] The ninth control valve 149 is arranged on the first inlet-outlet connection pipeline 171, the tenth control valve 150 is arranged on the second inlet-outlet connection pipeline 172, the eleventh control valve 151 is arranged on the third inlet-outlet connection pipeline 173, the twelfth control valve 152 is arranged on the fourth inlet-outlet connection pipeline 174, the thirteenth control valve 153 is arranged on the fifth inlet-outlet connection pipeline 175, and the fourteenth control valve 154 is arranged on the sixth inlet-outlet connection pipeline 176.

[0062] Among them, the control valve assembly 14 is used to control the on-off of the connecting pipelines in each connecting pipeline assembly 17. When the control valve assembly 14 is opened, the corresponding connecting pipeline can allow gas to flow in and out; when the control valve assembly 14 is closed, the corresponding connecting pipeline cannot allow gas to flow in and out. Through the above connection method, the series connection of different numbers of reactors 13 can be achieved.

[0063] For example, when the first control valve 141, the tenth control valve 150, the fourteenth control valve 154 and the eighth control valve 148 are opened and all other valves are closed, the series connection and use of the first-stage reactor 131, the third-stage reactor 133, and the fourth-stage reactor 134 can be achieved. At this time, when the second-stage reactor 132 is in an offline state, the remaining reactors 13 can continue to operate. By connecting any number of reactors 13 in series, online maintenance without shutdown can be achieved. If a certain stage of reactor 131 fails, the other three-stage reactors 133 can continue to be connected in series or operate individually. For example, when a certain layer of catalyst fails, the denitration efficiency of the latter two or three layers of catalyst can be tested, avoiding the delay of the test cycle caused by the failure of the evaluation system.

[0064] Referring to Figure 2 , according to some embodiments of the present invention, the fourth outlet 124 is connected to the third inlet 113, the second inlet 112, and the first inlet 111 through the seventh inlet and outlet connecting pipeline 177, the eighth inlet and outlet connecting pipeline 178, and the ninth inlet and outlet connecting pipeline 179 respectively. The third outlet 123 is connected to the second inlet 112 and the first inlet 111 through the tenth inlet and outlet connecting pipeline 180 and the eleventh inlet and outlet connecting pipeline 181 respectively. The second outlet 122 is connected to the first inlet 111 through the twelfth inlet and outlet connecting pipeline 182. By connecting the outlet of a certain stage of reactor 131 to the inlet of the upper-stage reactor 13, the series connection of any number and sequence of reactors 13 can be achieved, and online maintenance without shutdown can be achieved. If a certain stage of reactor 131 fails, the other three-stage reactors 133 can continue to be connected in series or operate individually. For example, when a certain layer of catalyst fails, the denitration efficiency of the latter two or three layers of catalyst can be tested, avoiding the delay of the test cycle caused by the failure of the evaluation system; or the working sequence of the remaining reactors 13 can be changed according to the actual situation to test the performance differences of the catalyst in different layers.

[0065] Among them, the connecting pipeline assembly 17 includes a first intake connecting pipeline 184, a second intake connecting pipeline 185, a third intake connecting pipeline 186, a fourth intake connecting pipeline 187, a first exhaust connecting pipeline 188, a second exhaust connecting pipeline 189, a third exhaust connecting pipeline 190, a fourth exhaust connecting pipeline 191, a first inlet / outlet connecting pipeline 171, a second inlet / outlet connecting pipeline 172, a third inlet / outlet connecting pipeline 173, a fourth inlet / outlet connecting pipeline 174, a fifth inlet / outlet connecting pipeline 175, a sixth inlet / outlet connecting pipeline 176, a seventh inlet / outlet connecting pipeline 177, an eighth inlet / outlet connecting pipeline 178, a ninth inlet / outlet connecting pipeline 179, a tenth inlet / outlet connecting pipeline 180, an eleventh inlet / outlet connecting pipeline 181, and a twelfth inlet / outlet connecting pipeline 182.

[0066] Among them, the fourth outlet 124 is connected to the third inlet 113 through the seventh inlet / outlet connecting pipeline 177; the fourth outlet 124 is connected to the second inlet 112 through the eighth inlet / outlet connecting pipeline 178; the fourth outlet 124 is connected to the first inlet 111 through the ninth inlet / outlet connecting pipeline 179; the third outlet 123 is connected to the second inlet 112 through the tenth inlet / outlet connecting pipeline 180; the third outlet 123 is connected to the first inlet 111 through the eleventh inlet / outlet connecting pipeline 181; the second outlet 122 is connected to the first inlet 111 through the twelfth inlet / outlet connecting pipeline 182.

[0067] Refer to Figure 2 , according to some embodiments of the present invention, the control valve assembly 14 includes a fifteenth control valve 155, a sixteenth control valve 156, a seventeenth control valve 157, an eighteenth control valve 158, a nineteenth control valve 159, and a twentieth control valve 160;

[0068] The fifteenth control valve 155 is arranged on the seventh inlet / outlet connecting pipeline 177, the sixteenth control valve 156 is arranged on the eighth inlet / outlet connecting pipeline 178, the seventeenth control valve 157 is arranged on the ninth inlet / outlet connecting pipeline 179, the eighteenth control valve 158 is arranged on the tenth inlet / outlet connecting pipeline 180, the nineteenth control valve 159 is arranged on the eleventh inlet / outlet connecting pipeline 181, and the twentieth control valve 160 is arranged on the twelfth inlet / outlet connecting pipeline 182.

[0069] Among them, the control valve assembly 14 is used to control the on / off of the connecting pipelines in each connecting pipeline assembly 17. When the control valve assembly 14 is opened, the corresponding connecting pipeline can allow gas to flow in and out; when the control valve assembly 14 is closed, the corresponding connecting pipeline cannot allow gas to flow in and out. Through the above connection method, the series connection of reactors 13 with different numbers and sequences can be realized.

[0070] For example, when the first control valve 141, the eleventh control valve 151, the fifteenth control valve 155, and the seventh control valve 147 are opened and all other valves are closed, the first-stage reactor 131, the fourth-stage reactor 134, and the third-stage reactor 133 can be used in series. At this time, with the second-stage reactor 132 in an offline state, the remaining reactors 13 can continue to operate. By connecting the reactors 13 in series in any number and order, online maintenance without shutting down the machine can be achieved. If a certain stage of the reactor 131 fails, the other three-stage reactors 133 can continue to operate in series or individually. For example, when a certain layer of catalyst fails, the denitrification efficiency of the latter two or three layers of catalyst can be tested to avoid delays in the test cycle caused by evaluation system failures; the working order of the remaining reactors 13 can also be changed according to the actual situation to test the performance differences of the catalyst in different layers.

[0071] Referring to Figure 2 , according to some embodiments of the present invention, the control valve assembly 14 further includes a twenty-first control valve 161. The intake pipe 11 and the exhaust pipe 12 are connected through a thirteenth intake and exhaust connection pipe 183, and the twenty-first control valve 161 is provided on the thirteenth intake and exhaust connection pipe 183.

[0072] Among them, the connection pipe assembly 17 includes a first intake connection pipe 184, a second intake connection pipe 185, a third intake connection pipe 186, a fourth intake connection pipe 187, a first exhaust connection pipe 188, a second exhaust connection pipe 189, a third exhaust connection pipe 190, a fourth exhaust connection pipe 191, a first intake and exhaust connection pipe 171, a second intake and exhaust connection pipe 172, a third intake and exhaust connection pipe 173, a fourth intake and exhaust connection pipe 174, a fifth intake and exhaust connection pipe 175, a sixth intake and exhaust connection pipe 176, a seventh intake and exhaust connection pipe 177, an eighth intake and exhaust connection pipe 178, a ninth intake and exhaust connection pipe 179, a tenth intake and exhaust connection pipe 180, an eleventh intake and exhaust connection pipe 181, a twelfth intake and exhaust connection pipe 182, and a thirteenth connection pipe.

[0073] For example, when the twenty-first control valve is opened and all other valves are closed, the intake pipe 11 and the exhaust pipe 12 can be directly connected, and the gas does not pass through any reactor 13. Through this method, tests such as airtightness verification of the pipeline can be carried out, and it is also convenient for pipeline maintenance.

[0074] According to some embodiments of the present invention, the flue gas sampling ports include an online flue gas sampling port and an offline flue gas sampling port. The flue gas analysis system 20 is used to test and analyze the test gas taken from the online flue gas sampling port, and the sampling of the offline flue gas sampling port satisfies the offline test of SO2 / SO3 conversion rate and NH3 escape.

[0075] Among them, on-line flue gas sampling can be that the flue gas analysis system 20 performs real-time test and analysis on the test gas taken from the on-line flue gas sampling port, which can quickly measure the concentrations of various components of the flue gas, and the detection data is displayed locally and transmitted to the software system. Off-line flue gas sampling can be manual sampling to improve the accuracy of the SO2 / SO3 conversion rate and NH3 escape tests.

[0076] According to some embodiments of the present invention, the gas distribution system 30 includes a first gas distribution pipeline 301, a second gas distribution pipeline 302, a third gas distribution pipeline 303, a fourth gas distribution pipeline 304, a fifth gas distribution pipeline 305, a sixth gas distribution pipeline 306, and a seventh gas distribution pipeline 307. The first gas distribution pipeline 301 is used to distribute N2, the second gas distribution pipeline 302 is used to distribute air, the third gas distribution pipeline 303 is used to distribute SO2, the fourth gas distribution pipeline 304 is used to distribute NO, the fifth gas distribution pipeline 305 is used to distribute NO2, the sixth gas distribution pipeline 306 is used to distribute NH3, and the seventh gas distribution pipeline 307 is used to distribute water vapor. Among them, NO, NO2, SO2, and NH3 use cylinder gases to ensure safety during storage and transportation.

[0077] Refer to Figure 1 , according to some embodiments of the present invention, the gas distribution system 30 includes a primary mixer 31 and a secondary mixer 32. The mixing inlet of the secondary mixer 32 is connected to the mixing outlet of the primary mixer 31, and the mixing outlet of the secondary mixer 32 is connected to the intake pipeline 11. The first gas distribution pipeline 301, the second gas distribution pipeline 302, the third gas distribution pipeline 303, the fourth gas distribution pipeline 304, and the fifth gas distribution pipeline 305 are all connected to the mixing inlet of the primary mixer 31, and the sixth gas distribution pipeline 306 and the seventh gas distribution pipeline 307 are both connected to the mixing inlet of the secondary mixer 32.

[0078] Among them, the primary mixer 31 can ensure that the flow rate, temperature, flue gas component concentration, etc. are evenly distributed before the flue gas enters the preheater, providing a stable basic condition for the subsequent mixing of the secondary mixer 32; the secondary mixer 32 plays a role in making ammonia and flue gas fully and evenly mixed, ensuring the accuracy of the denitration catalyst test process.

[0079] Refer to Figure 1 , according to some embodiments of the present invention, the gas distribution system 30 includes a heater 33, a water supply device 34, and a nitrogen production device 35. The nitrogen production device 35 includes a nitrogen generator and an air compressor. The nitrogen generator is used to supply N2 to the first gas distribution pipeline 301, and the air compressor is used to supply air to the second gas distribution pipeline 302. The heater 33 is connected between the mixing outlet of the primary mixer 31 and the mixing inlet of the secondary mixer 32, and the seventh gas distribution pipeline 307 is connected to the heater 33 to supply water vapor to the heater 33.

[0080] Among them, N2 can be produced by a nitrogen generator to increase the concentration of nitrogen; the O2 content can be adjusted by introducing air through an air compressor; water vapor can be generated by adding water with a pump with a metering function and heating it.

[0081] The heater 33 functions to heat the gas. Among them, the heating rate of the heater 33 can be 2-20 °C / min, supporting two modes of rapid heating and gradient heating, and having an automatic drainage and sewage discharge function.

[0082] Refer to Figure 1 According to some embodiments of the present invention, the full-size denitration catalyst performance evaluation system includes a gas-gas heat exchanger 41 and a gas-water heat exchanger 42. In the gas flow direction in the exhaust gas pipeline 12, the gas-gas heat exchanger 41, the gas-water heat exchanger 42, and the flue gas purification device 40 are arranged in sequence. The first gas distribution pipeline 301 and the exhaust gas pipeline 12 are both connected to the gas-gas heat exchanger 41, and the exhaust gas pipeline 12 is connected to the gas-water heat exchanger 42.

[0083] Among them, the gas-gas heat exchanger 41 can fully utilize the waste heat of the reaction tail gas to meet the energy-saving requirements. The maximum hot-end inlet flue gas temperature is 550 °C, and the heat recovery efficiency ≥ 85%; the gas-water heat exchanger 42 can ensure that the hot-end outlet flue gas temperature does not exceed 50 °C, and the wastewater generated and the wastewater generated by the condensation of the flue gas need to meet the national environmental protection discharge standards.

[0084] Next, refer to Figures 1 - 2 Describe the full-size denitration catalyst performance evaluation system according to some embodiments of the present invention.

[0085] Example 1,

[0086] Open the first control valve 141 and the fifth control valve 145, and close all other valves to realize the activity detection of the first-stage reactor 131; open the second control valve 142 and the sixth control valve 146, and close all other valves to realize the activity detection of the second-stage reactor 132; open the third control valve 143 and the seventh control valve 147, and close all other valves to realize the activity detection of the third-stage reactor 133; open the fourth control valve 144 and the eighth control valve 148, and close all other valves to realize the activity detection of the fourth-stage reactor 134.

[0087] The activity detection of any stage can be realized by the above method.

[0088] Example 2,

[0089] When the second-stage reactor 132 fails and needs maintenance and repair.

[0090] Open the first control valve 141, the tenth control valve 150, the fourteenth control valve 154, and the eighth control valve 148, and close all other valves, then the first-stage reactor 131, the third-stage reactor 133, and the fourth-stage reactor 134 can be used in series;

[0091] Open the first control valve 141, the eleventh control valve 151, the fifteenth control valve 155, and the seventh control valve 147, and close all other valves, then the first-stage reactor 131, the fourth-stage reactor 134, and the third-stage reactor 133 can be used in series;

[0092] Open the third control valve 143, the nineteenth control valve 159, the sixteenth control valve 156, and the eighth control valve 148, and close all other valves, then the third-stage reactor 133, the first-stage reactor 131, and the fourth-stage reactor 134 can be used in series;

[0093] Open the third control valve 143, the fourteenth control valve 154, the sixteenth control valve 156, and the fifth control valve 145, and close all other valves, then the third-stage reactor 133, the fourth-stage reactor 134, and the first-stage reactor 131 can be used in series;

[0094] Open the fourth control valve 144, the sixteenth control valve 156, the tenth control valve 150, and the seventh control valve 147, and close all other valves, then the fourth-stage reactor 134, the first-stage reactor 131, and the third-stage reactor 133 can be used in series;

[0095] Open the fourth control valve 144, the fifteenth control valve 155, the nineteenth control valve 159, and the fifth control valve 145, and close all other valves, then the fourth-stage reactor 134, the third-stage reactor 133, and the first-stage reactor 131 can be used in series.

[0096] Through the above method, when one or more of the reactors 13 in the first-stage reactor 131, the second-stage reactor 132, the third-stage reactor 133, and the fourth-stage reactor 134 fail, the other reactors 13 can be used in series in the same way.

[0097] Example 3,

[0098] When an optimization study on the combination scheme of the first, second, and third-stage catalysts is required.

[0099] Open the first control valve 141, the ninth control valve 149, the twentieth control valve 160, and the seventh control valve 147, and close all other valves, then the first-stage reactor 131, the second-stage reactor 132, and the third-stage reactor 133 can be used in series;

[0100] Open the first control valve 141, the tenth control valve 150, the sixth control valve 146, and the eighteenth control valve 158, and close all other valves. In this way, the first-stage reactor 131, the third-stage reactor 133, and the second-stage reactor 132 can be used in series;

[0101] Open the tenth control valve 150, the second control valve 142, the twentieth control valve 160, and the seventh control valve 147, and close all other valves. In this way, the second-stage reactor 132, the first-stage reactor 131, and the third-stage reactor 133 can be used in series;

[0102] Open the fifth control valve 145, the second control valve 142, the twentieth control valve 160, and the nineteenth control valve 159, and close all other valves. In this way, the second-stage reactor 132, the third-stage reactor 133, and the first-stage reactor 131 can be used in series;

[0103] Open the ninth control valve 149, the sixth control valve 146, the third control valve 143, and the nineteenth control valve 159, and close all other valves. In this way, the third-stage reactor 133, the first-stage reactor 131, and the second-stage reactor 132 can be used in series;

[0104] Open the fifth control valve 145, the twentieth control valve 160, the third control valve 143, and the eighteenth control valve 158, and close all other valves. In this way, the third-stage reactor 133, the second-stage reactor 132, and the first-stage reactor 131 can be used in series.

[0105] Through the above methods, when an optimization study of any hierarchical catalyst combination scheme is required, the corresponding reactors can be used in series in the same way.

[0106] In the description of this specification, the descriptions referring to terms such as "one embodiment", "some embodiments", "schematic embodiments", "examples", "specific examples", or "some examples" mean that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0107] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the claims and their equivalents.

Claims

1. A full-scale denitration catalyst performance evaluation system with dynamic series control, characterized in that Comprising: A catalyst reaction and control system, including an intake pipeline, an exhaust pipeline, a plurality of reactors, a control valve assembly, and a connecting pipeline assembly. Each of the reactors has an inlet and an outlet, and a flue gas sampling port is provided at the inlet and the outlet of each reactor. The plurality of reactors include a primary reactor, a secondary reactor, a tertiary reactor, and a quaternary reactor. The inlet and the outlet of the primary reactor are a first inlet and a first outlet respectively, the inlet and the outlet of the secondary reactor are a second inlet and a second outlet respectively, the inlet and the outlet of the tertiary reactor are a third inlet and a third outlet respectively, and the inlet and the outlet of the quaternary reactor are a fourth inlet and a fourth outlet respectively. The first inlet, the second inlet, the third inlet, and the fourth inlet are connected to the intake pipeline through a first intake connection pipeline, a second intake connection pipeline, a third intake connection pipeline, and a fourth intake connection pipeline respectively. The first outlet, the second outlet, the third outlet, and the fourth outlet are connected to the exhaust pipeline through a first exhaust connection pipeline, a second exhaust connection pipeline, a third exhaust connection pipeline, and a fourth exhaust connection pipeline respectively. The first outlet is connected to the second inlet, the third inlet, and the fourth inlet through a first inlet-outlet connection pipeline, a second inlet-outlet connection pipeline, and a third inlet-outlet connection pipeline respectively. The second outlet is connected to the third inlet and the fourth inlet through a fourth inlet-outlet connection pipeline and a fifth inlet-outlet connection pipeline respectively. The third outlet is connected to the fourth inlet through a sixth inlet-outlet connection pipeline. The control valve assembly is used to control the on-off of each of the connecting pipelines; A flue gas analysis system, connected to the catalyst reaction and control system, and the flue gas analysis system is used to test and analyze the test gas taken from the flue gas sampling port; A gas distribution system, connected to the intake pipeline, to provide test gas for the intake pipeline; A flue gas purification device, connected to the exhaust pipeline, to purify and discharge the test gas after catalytic treatment in the exhaust pipeline.

2. The full-size denitration catalyst performance evaluation system with dynamic series control according to claim 1, wherein The control valve assembly includes a first control valve, a second control valve, a third control valve, a fourth control valve, a fifth control valve, a sixth control valve, a seventh control valve, an eighth control valve, a ninth control valve, a tenth control valve, an eleventh control valve, a twelfth control valve, a thirteenth control valve, and a fourteenth control valve; Wherein, the first control valve is arranged on the first intake connection pipeline, the second control valve is arranged on the second intake connection pipeline, the third control valve is arranged on the third intake connection pipeline, and the fourth control valve is arranged on the fourth intake connection pipeline; The fifth control valve is arranged on the first exhaust connection pipeline, the sixth control valve is arranged on the second exhaust connection pipeline, the seventh control valve is arranged on the third exhaust connection pipeline, and the eighth control valve is arranged on the fourth exhaust connection pipeline; The ninth control valve is arranged on the first inlet and outlet connection pipeline, the tenth control valve is arranged on the second inlet and outlet connection pipeline, the eleventh control valve is arranged on the third inlet and outlet connection pipeline, the twelfth control valve is arranged on the fourth inlet and outlet connection pipeline, the thirteenth control valve is arranged on the fifth inlet and outlet connection pipeline, and the fourteenth control valve is arranged on the sixth inlet and outlet connection pipeline.

3. The full-size denitration catalyst performance evaluation system with dynamic series control according to claim 1, wherein The fourth outlet is connected to the third inlet, the second inlet, and the first inlet through the seventh inlet and outlet connection pipeline, the eighth inlet and outlet connection pipeline, and the ninth inlet and outlet connection pipeline respectively. The third outlet is connected to the second inlet and the first inlet through the tenth inlet and outlet connection pipeline and the eleventh inlet and outlet connection pipeline respectively. The second outlet is connected to the first inlet through the twelfth inlet and outlet connection pipeline.

4. The full-scale denitration catalyst performance evaluation system with dynamic series control according to claim 3, characterized in that, The control valve assembly includes a fifteenth control valve, a sixteenth control valve, a seventeenth control valve, an eighteenth control valve, a nineteenth control valve, and a twentieth control valve; The fifteenth control valve is arranged on the seventh inlet and outlet connection pipeline, the sixteenth control valve is arranged on the eighth inlet and outlet connection pipeline, the seventeenth control valve is arranged on the ninth inlet and outlet connection pipeline, the eighteenth control valve is arranged on the tenth inlet and outlet connection pipeline, the nineteenth control valve is arranged on the eleventh inlet and outlet connection pipeline, and the twentieth control valve is arranged on the twelfth inlet and outlet connection pipeline.

5. The full-size denitration catalyst performance evaluation system with dynamic series control according to claim 1, characterized in that The control valve assembly further includes a twenty-first control valve. The intake pipeline and the exhaust pipeline are connected through a thirteenth inlet and outlet connection pipeline, and the twenty-first control valve is arranged on the thirteenth inlet and outlet connection pipeline.

6. The full-size denitration catalyst performance evaluation system with dynamic series control according to claim 1, characterized in that The flue gas sampling port includes an on-line flue gas sampling port and an off-line flue gas sampling port. The flue gas analysis system is used to test and analyze the test gas taken from the on-line flue gas sampling port. The sampling of the off-line flue gas sampling port meets the requirements for off-line testing of the SO2 / SO3 conversion rate and NH3 escape.

7. The full-size denitration catalyst performance evaluation system with dynamic series control according to any one of claims 1-6, characterized in that, The gas distribution system includes a first gas distribution pipeline, a second gas distribution pipeline, a third gas distribution pipeline, a fourth gas distribution pipeline, a fifth gas distribution pipeline, a sixth gas distribution pipeline, and a seventh gas distribution pipeline. The first gas distribution pipeline is used to distribute N2, the second gas distribution pipeline is used to distribute air, the third gas distribution pipeline is used to distribute SO2, the fourth gas distribution pipeline is used to distribute NO, the fifth gas distribution pipeline is used to distribute NO2, the sixth gas distribution pipeline is used to distribute NH3, and the seventh gas distribution pipeline is used to distribute water vapor.

8. The full-size denitration catalyst performance evaluation system with dynamic series control according to claim 7, characterized in that, The gas distribution system includes a primary mixer and a secondary mixer. The mixing inlet of the secondary mixer is connected to the mixing outlet of the primary mixer, and the mixing outlet of the secondary mixer is connected to the intake pipeline. The first gas distribution pipeline, the second gas distribution pipeline, the third gas distribution pipeline, the fourth gas distribution pipeline, and the fifth gas distribution pipeline are all connected to the mixing inlet of the primary mixer. The sixth gas distribution pipeline and the seventh gas distribution pipeline are both connected to the mixing inlet of the secondary mixer.

9. The full-size denitration catalyst performance evaluation system with dynamic series control according to claim 8, characterized in that, The gas distribution system includes a heater, a water supply device, and a nitrogen generation device. The nitrogen generation device includes a nitrogen generator and an air compressor. The nitrogen generator is used to supply N2 to the first gas distribution pipeline, and the air compressor is used to supply air to the second gas distribution pipeline. The heater is connected between the mixing outlet of the primary mixer and the mixing inlet of the secondary mixer. The seventh gas distribution pipeline is connected to the heater to supply steam to the heater.

10. The full-size denitration catalyst performance evaluation system with dynamic series control according to claim 7, characterized in that, It includes a gas-gas heat exchanger and a gas-water heat exchanger. In the airflow direction in the exhaust gas pipeline, the gas-gas heat exchanger, the gas-water heat exchanger, and the flue gas purification device are arranged in sequence. Both the first gas distribution pipeline and the exhaust gas pipeline are connected to the gas-gas heat exchanger, and the exhaust gas pipeline is connected to the gas-water heat exchanger.

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