CN209841810U - Denitration catalyst full load operation performance test device - Google Patents
Denitration catalyst full load operation performance test device Download PDFInfo
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- CN209841810U CN209841810U CN201822272590.XU CN201822272590U CN209841810U CN 209841810 U CN209841810 U CN 209841810U CN 201822272590 U CN201822272590 U CN 201822272590U CN 209841810 U CN209841810 U CN 209841810U
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Abstract
The utility model discloses a denitration catalyst full load operation performance test device. The utility model discloses a flue gas sample interface, accuse temperature flue gas pipe, catalyst test room, catalyst sample, thermostated container, dust remover, cooling condenser, draught fan, exhaust interface. The utility model discloses arrange behind the ammonia injection grid of power plant SCR flue gas denitration system entry, gather the real flue gas after the part spouts the ammonia, adopt the method of outside accuse temperature, carry out the low-load analogue test, the test process does not basically receive the unit load to influence. Through the utility model discloses the device is experimental, obtains the safe operation control parameter such as the temperature lower limit of SCR catalyst low-load operation and safe sustainable time, provides technical support for the power plant implements full load denitration.
Description
Technical Field
The utility model belongs to the technical field of the environmental protection, a denitration catalyst full load operation performance test device is related to.
Background
The method is characterized in that an SCR flue gas denitration system is adopted by most of units at present, the theoretical safe operation temperature window of an SCR catalyst is 300-400 ℃, denitration is generally stopped to ensure the safety of the catalyst and a boiler system when the flue gas temperature is lower than 300 ℃ conventionally, and denitration is required to be put into operation no matter the flue gas temperature is lower than 300 ℃ along with the improvement of the flexibility of the units and the implementation of full-load denitration, more units are often operated under lower load, and the denitration is required to be put into operation no matter in low load or ignition.
Disclosure of Invention
For solving the problem that the background relates to, the utility model provides a denitration catalyst full load operation performance test device.
The utility model discloses an aim at putting up the laboratory bench in the power plant, adopt the method of the true outside accuse temperature of flue gas of collection part, carry out the low-load analogue test, the test process is not influenced by unit load basically to obtain the safe operation control parameter such as the temperature lower limit of SCR catalyst low-load operation and safe sustainable time, provide technical support for the power plant implements full load denitration.
The utility model provides a technical scheme that its technical problem adopted is:
the utility model discloses a flue gas sample interface, accuse temperature flue gas pipe, catalyst test room, catalyst sample, thermostated container, dust remover, cooling condenser, draught fan, exhaust interface.
The flue gas sampling interface comprises a flue gas sampling pipe and a flange, wherein the flue gas sampling pipe needs to go deep into the boiler flue for more than 0.5 m, the representativeness of flue gas is ensured, and the flange plays a role in fixing the flue gas sampling pipe and sealing. If the ash concentration problem does not need to be considered in the test, the flue gas sampling tube can be a straight tube; if the problem of ash concentration needs to be considered, the inlet of the flue gas sampling pipe needs to be parallel to the flue gas flow line in the boiler flue, and constant-speed sampling is adopted, namely the inlet gas flow speed is equal to the flue gas flow speed in the boiler flue.
The temperature control flue gas pipe comprises an electric heater, a water cooler, a water pump, a water tank, a controller and a thermocouple. The electric heater and the water cooler jointly form a smoke temperature adjusting system, and the smoke temperature of the test is accurately adjusted to reach a required target value. The water system of the water cooler comprises a water pump and a water tank, cooling water is directly discharged from the outlet of the water cooler due to small water flow, and the water tank for discharging the cooling water can be added if necessary. The cooling water flow and the electric heating power are uniformly controlled by the controller, so that the temperature of the test flue gas reaches a required target value. The test flue gas temperature was measured with a thermocouple. The water pump execution unit of the controller adopts a frequency converter, and the electric heater execution unit adopts silicon controlled rectifier.
The cross section of the catalyst testing chamber is a square container, an inlet and an outlet are connected with a flue gas pipeline through a necking, and a flue gas uniform guide plate and a catalyst support are arranged in the catalyst testing chamber. The even guide plate of flue gas is used for the air current evenly distributed who gets into the flue gas pipeline to the catalyst test chamber, and catalyst support is used for placing the catalyst sample, the utility model discloses can place 4 pieces of catalyst simultaneously side by side on the example support, in order to avoid the serious hourglass wind in gap between the catalyst, the support adopts "field" font lattice structure. According to specific test requirements, the number of catalysts which can be arranged in the catalyst testing chamber can be flexibly designed.
The catalyst sample, namely the test object, is processed into a cube with the side length of 120 mm.
The constant temperature box is used for placing the catalyst testing chamber and controlling the temperature in the constant temperature box, so that the temperature of the flue gas in the catalyst testing chamber is basically kept stable. An electric heater is arranged in the constant temperature box, the heating power is controlled by a controller, so that the temperature of the flue gas at the outlet of the catalyst testing chamber is basically consistent with the temperature of the flue gas at the inlet (namely the temperature of the test flue gas), and the temperature of the flue gas at the outlet of the catalyst testing chamber is measured by a thermocouple. The electric heating control unit of the controller adopts controllable silicon.
The dust remover adopts a plurality of filter cylinders which are arranged in parallel as a filter for removing fly ash in flue gas so as to ensure the normal operation of subsequent equipment. The removed ash is deposited in the dust collector cavity and is cleaned regularly.
The cooling condenser adopts a water cooling heat exchange mode to cool the flue gas to a temperature close to the ambient temperature, and condensed water after the flue gas is cooled is removed at the same time, so that the normal operation of subsequent equipment is ensured.
The induced draft fan is used for extracting flue gas, in order to stably control the flow of the flue gas, a temperature and flow measuring device is arranged at an inlet of the induced draft fan, the flow measuring device is controlled and converted to a flow target value in a standard state through a controller, and an execution unit of the controller adopts a frequency converter.
The exhaust interface comprises a flue gas pipe and a flange. Because the flue gas flow of the test system is large, the tested flue gas is directly exhausted, and certain environmental pollution exists, the flue gas is introduced into the boiler flue again. The flange is used for fixing the flue gas pipe and preventing air leakage from entering a boiler flue.
The utility model discloses beneficial effect as follows:
the utility model discloses a flue gas flow and experimental flue gas temperature confirm according to flue gas velocity of flow and temperature of boiler SCR deNOx systems under different loads of research, and the flue gas velocity of flow and temperature in the control catalyst test chamber are unanimous basically with the actual operating parameter of boiler SCR deNOx systems under the simulation load promptly. For avoiding nature heat dissipation cooling too fast in the connecting tube to prevent the dust deposit, the flue gas velocity of flow in the connecting tube should select higher speed, the utility model discloses the example adopts 4 piece length of side 120 mm's catalyst to arrange side by side, and the connecting tube of adoption is 3 inches stainless steel pipe.
Drawings
Fig. 1 is a schematic view of the structural principle of the present invention.
In fig. 1: 1. the device comprises a flue gas sampling interface, 2, a warm flue gas pipe, 3, a catalyst testing chamber, 4, a catalyst sample, 5, a thermostat, 6, a dust remover, 7, a cooling condenser, 8, an induced draft fan, 9 and an exhaust interface.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings.
As shown in fig. 1, a full-load operation performance test device for a denitration catalyst comprises a flue gas sampling interface 1, a temperature control flue gas pipe 2, a catalyst test chamber 3, a catalyst sample 4, a thermostat 5, a dust remover 6, a cooling condenser 7, an induced draft fan 8 and an exhaust interface 9.
The flue gas sampling interface 1 comprises a flue gas sampling pipe 1-1 and a flange 1-2, wherein the flue gas sampling pipe 1-1 needs to extend into the boiler flue for more than 0.5 m to ensure the representativeness of flue gas, and the flange 1-2 plays a role in fixing and sealing the flue gas sampling pipe 1-1. If the ash concentration problem does not need to be considered in the test, the flue gas sampling tube 1-1 can be a straight tube; if the problem of ash concentration needs to be considered, the inlet of the flue gas sampling tube 1-1 needs to be parallel to a flue gas flow line in a boiler flue, and constant-speed sampling is adopted, namely the flow speed of the inlet gas is equal to the flow speed of the flue gas in the boiler flue.
The temperature control flue gas pipe 2 comprises an electric heater 2-1, a water cooler 2-2, a water pump 2-3, a water tank 2-4, a controller 2-5 and a thermocouple 2-6. The electric heater 2-1 and the water cooler 2-2 jointly form a smoke temperature adjusting system, and the smoke temperature of the test is accurately adjusted to reach a required target value. The water system of the water cooler 2-2 is composed of a water pump 2-3 and a water tank 2-4, and because the water flow is not large, cooling water is directly discharged from the outlet of the water cooler 2-2, and the water tank for discharging the cooling water can be added if necessary. The cooling water flow and the electric heating power are uniformly controlled by the controllers 2-5, so that the temperature of the test flue gas reaches the required target value. The test flue gas temperature was measured with thermocouples 2-6. The execution unit of the water pump 2-3 of the controller 2-5 adopts a frequency converter, and the execution unit of the electric heater 2-1 adopts silicon controlled rectifier.
The catalyst testing chamber 3 is a square container with a cross section, an inlet and an outlet are connected with a flue gas pipeline through a necking, and a flue gas uniform guide plate 3-1 and a catalyst support 3-2 are arranged in the catalyst testing chamber. Flue gas uniform flow guide plate 3-1 is used for evenly distributing the air current that flue gas pipeline got into catalyst test chamber 3, and catalyst support 3-2 is used for placing the catalyst sample, the utility model discloses can place 4 catalysts simultaneously side by side on the example support, in order to avoid the serious air leakage in gap between the catalyst, the support adopts "field" font lattice structure. The number of catalysts that can be arranged in the catalyst test chamber 3 can be designed flexibly according to the specific test requirements.
The catalyst sample 4, i.e., the test object, the catalyst sample 4 was processed into a cube having a side of 120 mm.
The constant temperature box 5 is used for placing the catalyst testing chamber 3 and controlling the temperature in the constant temperature box 5, so that the temperature of the flue gas in the catalyst testing chamber 3 is basically kept stable. An electric heater 5-1 is arranged in the constant temperature box 5, the heating power is controlled by a controller 5-2, so that the temperature of the flue gas at the outlet of the catalyst testing chamber 3 is basically consistent with the temperature of the flue gas at the inlet (namely the temperature of the test flue gas), and the temperature of the flue gas at the outlet of the catalyst testing chamber 3 is measured by a thermocouple 5-3. The control unit of the electric heater 5-1 of the controller 5-2 adopts controllable silicon.
The dust remover 6 adopts a plurality of filter cartridges 6-1 which are arranged in parallel as a filter for removing fly ash in flue gas so as to ensure the normal operation of subsequent equipment. The removed ash is deposited in the cavity of the dust remover 6 and is cleaned periodically.
The cooling condenser 7 adopts a water cooling heat exchange mode to cool the flue gas to a temperature close to the ambient temperature, and condensed water after the flue gas is cooled is removed at the same time, so that the normal operation of subsequent equipment is ensured.
The induced draft fan 8 is used for extracting flue gas, in order to stably control the flow of the flue gas, a temperature and flow measuring device 8-1 is arranged at an inlet of the induced draft fan, the flow target value in the standard state is converted through the control of the controller 8-2, and an execution unit of the induced draft fan 8 of the controller 8-2 adopts a frequency converter.
The exhaust interface 9 comprises a flue gas pipe 9-1 and a flange 9-2. Because the flue gas flow of the test system is large, the tested flue gas is directly exhausted, and certain environmental pollution exists, the flue gas is introduced into the boiler flue again. The flange 9-2 is used for fixing the flue gas pipe 9-1 and preventing air leakage from entering a boiler flue.
The utility model discloses a flue gas flow and experimental flue gas temperature confirm according to flue gas velocity of flow and temperature of boiler SCR deNOx systems under different loads of research, and the flue gas velocity of flow and the temperature in the control catalyst test chamber 3 are unanimous basically with the actual operating parameter of boiler SCR deNOx systems under the simulated load promptly. For avoiding nature heat dissipation cooling too fast in the connecting tube to prevent the dust deposit, the flue gas velocity of flow in the connecting tube should select higher speed, the utility model discloses the example adopts 4 piece length of side 120 mm's catalyst to arrange side by side, and the connecting tube of adoption is 3 inches stainless steel pipe.
Claims (5)
1. The full-load operation performance test device for the denitration catalyst is characterized by comprising a flue gas sampling interface, a temperature control flue gas pipe, a catalyst test chamber, a catalyst sample, a constant temperature box, a dust remover, a cooling condenser, an induced draft fan and an exhaust interface;
the flue gas sampling interface comprises a flue gas sampling pipe and a flange, wherein the flue gas sampling pipe needs to be inserted into a boiler flue by more than 0.5 m to ensure the representativeness of flue gas, and the flange plays a role in fixing and sealing the flue gas sampling pipe;
the temperature control flue gas pipe comprises an electric heater, a water cooler, a water pump, a water tank, a controller and a thermocouple; the electric heater and the water cooler jointly form a smoke temperature adjusting system, and the smoke temperature of the test is accurately adjusted to reach a required target value; the water system of the water cooler comprises a water pump and a water tank, cooling water is directly discharged from the outlet of the water cooler, and the flow rate of the cooling water and the electric heating power are uniformly controlled by a controller, so that the temperature of the test flue gas reaches a required target value; the thermocouple is used for measuring the test flue gas temperature; a water pump execution unit of the controller adopts a frequency converter, and an electric heater execution unit adopts silicon controlled rectifier;
the cross section of the catalyst testing chamber is a square container, an inlet and an outlet are connected with a flue gas pipeline through a necking, and a flue gas uniform guide plate and a catalyst support are arranged in the catalyst testing chamber;
the catalyst sample, namely a test object, is processed into a cube with the side length of 120 mm;
the constant temperature box is used for placing the catalyst testing chamber and controlling the temperature in the constant temperature box, so that the temperature of the flue gas in the catalyst testing chamber is basically kept stable;
the dust remover adopts a plurality of filter cylinders which are arranged in parallel as a filter and is used for removing fly ash in flue gas;
the cooling condenser adopts a water cooling heat exchange mode to cool the flue gas to the ambient temperature, and condensed water after the flue gas is cooled is removed at the same time, so that the normal operation of subsequent equipment is ensured;
the induced draft fan is used for extracting flue gas, a temperature and flow measuring device is arranged at an inlet of the induced draft fan for stably controlling the flow of the flue gas, and the flow target value in a standard state is converted through the control of a controller, and an execution unit of the controller adopts a frequency converter;
the exhaust interface comprises a flue gas pipe and a flange; reintroducing the flue gas into the boiler flue; the flange is used for fixing the flue gas pipe and preventing air leakage from entering a boiler flue.
2. The denitration catalyst full-load operation performance test device according to claim 1, characterized in that the flue gas sampling tube adopts a straight tube.
3. The denitration catalyst full-load operation performance test device according to claim 2, wherein the inlet of the flue gas sampling pipe is parallel to the flue gas flow line in the boiler flue, and the sampling is performed at a constant speed, that is, the inlet gas flow speed is equal to the flue gas flow speed in the boiler flue.
4. The denitration catalyst full-load operation performance test device of claim 3, wherein the flue gas uniform guide plate is used for uniformly distributing the gas flow entering from the flue gas pipeline to the catalyst test chamber, and the catalyst support is used for placing a catalyst sample.
5. The denitration catalyst full-load operation performance test device according to claim 4, characterized in that the catalyst support adopts a grid structure shaped like a Chinese character 'tian'.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201822272590.XU CN209841810U (en) | 2018-12-29 | 2018-12-29 | Denitration catalyst full load operation performance test device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201822272590.XU CN209841810U (en) | 2018-12-29 | 2018-12-29 | Denitration catalyst full load operation performance test device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109668996A (en) * | 2018-12-29 | 2019-04-23 | 浙江大学 | A kind of denitrating catalyst full load runnability experimental rig |
| CN117470596A (en) * | 2023-12-26 | 2024-01-30 | 苏州华能检测技术有限公司 | Online flue gas monitoring device and online flue gas monitoring method |
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2018
- 2018-12-29 CN CN201822272590.XU patent/CN209841810U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109668996A (en) * | 2018-12-29 | 2019-04-23 | 浙江大学 | A kind of denitrating catalyst full load runnability experimental rig |
| CN117470596A (en) * | 2023-12-26 | 2024-01-30 | 苏州华能检测技术有限公司 | Online flue gas monitoring device and online flue gas monitoring method |
| CN117470596B (en) * | 2023-12-26 | 2024-04-02 | 苏州华能检测技术有限公司 | Online flue gas monitoring device and online flue gas monitoring method |
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