CN102072947B - Testing method and testing device for properties of SCR (semiconductor control rectifier) smoke denitrating catalyst - Google Patents
Testing method and testing device for properties of SCR (semiconductor control rectifier) smoke denitrating catalyst Download PDFInfo
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Abstract
The invention discloses a testing method and testing device for the properties of an SCR (semiconductor control rectifier) smoke denitrating catalyst, and the testing method provided by the invention comprises the following steps: mixing and heating simulated smoke; and obtaining the temperature, the pressure and the relevant data of NO, SO2, SO3 and NH3 under the condition that the flow of the smoke is 1-2Nm<3>/h, the linear velocity LV of the smoke through the catalyst is greater than 0.85m/s, and the area velocity AV of the smoke through the catalyst is the same to the area velocity AV under the actual working conditions. The invention also provides a device for realizing the testing method. The invention provides the device and method for testing the properties, which has the advantages of simple testing working procedures, low cost and small sample amount. The mini-sized testing device provided by the invention is adopted to substitute the existing medium-sized testing device for testing the properties of the catalyst, and the testing method has the advantages of small required smoke amount, short testing time and low testing cost, can simultaneously test two catalyst samples once and has obvious technical and economic benefits.
Description
Technical field
The invention belongs to a kind of catalyst performance method of testing and proving installation technical field, relate in particular to a kind of catalyst for denitrating flue gas performance test methods and proving installation.
Background technology
SCR (SCR) catalyst for denitrating flue gas is widely used in removing of the middle oxides of nitrogen (NOx) of waste gas (being flue gas) such as generating plant coal-burning boiler, cement mill stove, incinerator, and denitrating catalyst comprises honeycomb fashion, flat and corrugated three kinds of forms.And catalyst performance proving installation and method of testing are the gordian techniquies of testing and estimating about the performance of selective catalytic reduction catalyst for flue gas denitration.
SCR denitration technology and SCR denitrating catalyst 20th century the seventies rise in Japan and begin to drop into commercial utilization, later Europe, the U.S. etc. of successively transferring the possession of of 20th century the eighties, and further developed and use, now become a kind of maturation, reliable, solution NOx discharging best-of-breed technology.China is starting late aspect the research of SCR denitration technology, is is just digesting and assimilating the production domesticization that realizes the SCR denitrating catalyst on the basis of imported technology in 2006.Wherein, the performance evaluation technology to the denitrating catalyst product also adopts external mature technology, promptly medium-sized (bench) reactor performance proving installation and method.
Medium-sized (bench) performance testing device is by catalyzer actual motion flue gas conditions such as simulation power plant, the performance of the whole denitrating catalyst monomer of nondestructive test, reactor is that the cross section is 155 * 155mm, length is the tubulose of 1300mm, flue gas flow 150～the 300Nm3/h of test, maximum can realize that length is 1200mm, the cross section is the monomer performance test of 150 * 150mm, probe temperature is up to 450 ℃, test result can reflect the performance of denitrating catalyst preferably, always as the foundation of estimating catalyzer combination property under the SCR denitrating system actual operating mode.But this performance testing device exist gas consumption big (150～300Nm3/h), long (more than 72 hours), the experimentation cost height shortcomings such as (ten thousand yuan/time of 3-5) of Measuring Time.
Summary of the invention
The invention discloses a kind of SCR catalyst for denitrating flue gas performance test methods and proving installation, the problem that the present invention will solve provides a kind of SCR catalyst for denitrating flue gas performance test methods, and another problem that the present invention will solve provides a kind of proving installation of realizing above-mentioned method of testing.
The invention provides following is exactly that scheme realizes:
A kind of catalyst for denitrating flue gas performance test methods of economical and efficient may further comprise the steps:
(1) with high pure nitrogen, pressurized air, NO, SO
2, NH
3And H
2The O steam, each component content is consistent with catalyzer actual operating mode smoke components content;
(2) (1) step mixed flue gas is heated to flue-gas temperature under the catalyzer actual operating mode;
(3) with cross section 10 * 10mm～30 * 30mm, the catalyst sample of the length 100～400mm microreactor of packing into;
(4) under the following condition simulated flue gas after step (2) heating is being passed through step (3) reactor, A, flue gas flow 1～2Nm
3/ h (S.T.P., wet), B, the linear velocity LV by catalyzer greater than 0.85m/s (S.T.P., wet), C, identical with face velocity AV under the actual operating mode by the face velocity AV of catalyzer;
(5) temperature, pressure-detecting device and NO, the SO that installs respectively by the entrance and exit end of microreactor
2, SO
3, NH
3Sampler obtains data respectively and handles.
Further described microreactor entrance and exit end NO concentration determination data are also determined the denitration efficiency of denitrating catalyst with chemiluminescence determination.
Further described microreactor entrance and exit end SO
2And/or SO
3The concentration determination data are with oxidimetry mensuration and determine SO
2/ SO
3Conversion ratio.
Further described microreactor entrance and exit end NH
3The concentration determination data are with neutralization titration mensuration and determine NH
3Removal efficiency.
The present invention realizes the proving installation of above-mentioned method of testing, comprises following components:
(1) flue gas mixing arrangement is with high pure nitrogen, pressurized air, NO, SO
2, NH
3And H
2The O steam is synthesized and the consistent simulated flue gas of catalyzer actual operating mode smoke components;
(2) electrical heat exchanger is heated to flue-gas temperature under the catalyzer actual operating mode with the simulation mixed flue gas;
(3) microreactor, reactor are tubulose, diameter≤Φ 50mm, and dress cross section 10 * 10mm～30 * 30mm in the length 300～500mm, reactor, the catalyst sample of length 100～400mm, the simulated flue gas after the heating is by this reactor;
(4) proving installation is equipped with temperature, pressure-detecting device and NO, SO respectively at the entrance and exit end of microreactor
2, SO
3, NH
3Sampler;
Above-mentioned flue gas mixing arrangement, electrical heat exchanger, microreactor are installed in the thermostatic oven.
Proving installation of the present invention is at supporting 2 flue gas mixers of parallel installation, 2 electrical heat exchangers and 2 microreactors in the thermostatic oven of flue gas compounding system, once can carry out 2 identical catalyst performances tests of test condition simultaneously.
Said temperature, pressure-detecting device and NO, SO
2, SO
3, NH
3Sampler is a commercial device, described NO, SO
2, SO
3, NH
3The detection adquisitiones of test data is a prior art.
Adopt miniature performance testing device to substitute medium-sized (bench) performance testing device simulation catalyzer actual motion condition and carry out catalyst performance evaluation, described miniature performance testing device the has been supporting thermostatic oven of flue gas compounding system, 2 length 300-500mm are arranged in parallel in the stove, the tubulose microreactor of diameter≤Φ 50mm, the flue gas flow of single microreactor be 1-2Nm3/h (S.T.P., wet).Because the size of miniature performance testing device reactor is little, the sample size size is restricted.Therefore, the exhaust gas volumn that calculates of size and experiment flue gas computing method per sample, can only guarantee that at corresponding linear velocity LV by catalyzer under this exhaust gas volumn and face velocity AV a parameter is identical with parameter under the medium-sized test condition, if just simple proportional reduction, the parameter and experiment condition different that just have both, can not realize simulating the performance evaluation under the catalyzer actual motion condition, also can't implement device and the substituting of method.
At probe temperature, oxygen content, liquid water content, NO concentration, SO
2Under the identical condition of concentration, miniature performance test is because the change of sample size, thereby make inconsistent in medium-sized test of the linear velocity LV by catalyzer and face velocity AV under the test exhaust gas volumn, the sample size of test can't guarantee 2m/s (S.T.P., wet) Yi Shang flue gas linear velocity, can only realize the linear velocity about 1m/s, cause the widely different of test result.Because in SCR system actual motion, flue gas passes through the linear velocity LV of catalyzer generally at 2～3m/s (S.T.P., wet) between, in order to guarantee the consistance of miniature The performance test results and medium-sized (bench) The performance test results, it is identical with medium-sized test condition that miniature performance test condition must guarantee that flue gas passes through the face velocity AV of catalyzer.
Obtain after further research, under guaranteeing that flue gas is by the face velocity AV of the catalyzer prerequisite identical with medium-sized test condition, change linear velocity LV and carry out miniature performance test, when linear velocity LV greater than 0.85m/s (S.T.P., wet) time, miniature test result and medium-sized test result basically identical can implementation method substitute; When linear velocity LV less than 0.85m/s (S.T.P., in the time of wet), The performance test results increases with the increase of linear velocity LV, test result and medium-sized test result deviation are bigger.If guarantee that flue gas is constant by the linear velocity LV of catalyzer, change face velocity AV, miniature test result increases with face velocity AV and reduces, and is bigger with medium-sized test result deviation, can not substitute.
So, guaranteeing that (S.T.P., wet), under the face velocity AV prerequisite identical with medium-sized test condition, miniature performance test methods can substitute medium-sized performance test to the linear velocity LV of flue gas by catalyzer greater than 0.85m/s.And, miniature proving installation is simple in structure, the exhaust gas volumn little (1-2Nm3/h) that method of testing needs, short (36-48h), testing cost low (about 3000 yuan/time) of test duration, and once can test 2 catalyst samples simultaneously, have significant technical economic benefit.
Helpfulness of the present invention: the invention provides that a kind of test step is simple, cost is low, and few performance testing device and the method for sample size.Adopt the miniature proving installation of the present invention to substitute existing medium-sized proving installation detecting catalyst performance, the exhaust gas volumn that method of testing needs is little, the test duration is short, testing cost is low, and once can test 2 catalyst samples simultaneously, have significant technical economic benefit.
Description of drawings
Fig. 1 is a proving installation schematic process flow diagram of the present invention.
Embodiment
Below, according to embodiment the present invention is specified, but scope of the present invention being not limited to following embodiment, the represented constituent parts of the present invention is described as follows:
m
3/ h represents: cubic meter/per hour,
S.T.P., wet represents: the standard hygrometric state,
Vpm represents: the ppm of volume content,
S.T.P., dry represents: the standard dry state,
M/s represents: meter per second,
M/h represents: rice/hour,
L/h represents: rise/hour
Embodiment 1
Selecting pitch is the catalyzer monomer of 10.0mm, carries out performance test on medium-sized (bench) performance testing device, and test condition is as follows:
Exhaust gas volumn: 157.41 m
3/ h (S.T.P., wet)
Temperature: 372 ℃
Oxygen content: 3.28 %
Liquid water content: 8.50 %
NO concentration: 319.3 vpm (S.T.P., dry)
SO
2Concentration: 403.1 vpm (S.T.P., dry)
Linear velocity (LV):: 2.56 m/s (S.T.P., wet)
Face velocity (AV): 20.6 m/h (S.T.P., wet)
After the medium-sized end of test (EOT), producing hole count on this catalyzer monomer is 2 * 2, and length is the sample of 320.7mm, tests on the miniature performance testing device of the present invention.Test condition is as follows:
Exhaust gas volumn: 903.58 l/h (S.T.P., wet)
Temperature: 372 ℃
Oxygen content: 3.28 %
Liquid water content: 8.50 %
NO concentration: 319.3 vpm (S.T.P., dry)
SO
2Concentration: 403.1 vpm (S.T.P., dry)
Linear velocity (LV): 0.85 m/s (S.T.P., wet)
Face velocity (AV): 20.6 m/h (S.T.P., wet)
Embodiment 2
With producing hole count on the same catalyzer monomer of embodiment 1 miniature performance test is 3 * 3, length is 360mm, exhaust gas volumn is 2273.7l/h (S.T.P., wet), face velocity (AV) be 20.6m/h (S.T.P., wet), linear velocity (LV) is 1.2m/s (S.T.P., wet), other conditions are the same with embodiment 1, test on the miniature performance testing device of the present invention.
Embodiment 3
With producing hole count on the same catalyzer monomer of embodiment 1 miniature performance test is that 2 * 2 length are 400mm, exhaust gas volumn be 1127.01l/h (S.T.P., wet), face velocity (AV) is 20.6m/h (S.T.P., wet), linear velocity (LV) be 1.6m/s (S.T.P., wet)
Other conditions are the same with embodiment 1, test on the miniature performance testing device of the present invention.
Embodiment 4
Selecting pitch is the catalyzer monomer of 7.6mm, carries out performance test on medium-sized (bench) performance testing device, and test condition is as follows:
Exhaust gas volumn: 154.97 m
3/ h (S.T.P., wet)
Temperature: 377 ℃
Oxygen content: 3.03 %
Liquid water content: 9.60 %
NO concentration: 175.0 vpm (S.T.P., dry)
SO
2Concentration: 414.6 vpm (S.T.P., dry)
Linear velocity (LV): 2.56 m/s (S.T.P., wet)
Face velocity (AV): 24.76 m/h (S.T.P., wet)
After the end of test (EOT), producing hole count on this catalyst test monomer is 3 * 3, and length is the test unit sample of 210mm, tests on the miniature performance testing device of the present invention.Test condition is as follows:
Exhaust gas volumn: 1234.13 l/h (S.T.P., wet)
Temperature: 377 ℃
Oxygen content: 3.03 %
Liquid water content: 9.60 %
NO concentration: 175.0 vpm (S.T.P., dry)
SO
2Concentration: 414.6 vpm (S.T.P., dry)
Linear velocity (LV): 0.88 m/s (S.T.P., wet)
Face velocity (AV): 24.76 m/h (S.T.P., wet)
Embodiment 5
With producing hole count on the same catalyzer monomer of embodiment 4 miniature performance tests is 3 * 3, length is 280mm, exhaust gas volumn is 1645.5l/h S.T.P., wet, face velocity (AV) is 24.76m/hS.T.P., wet, linear velocity (LV) is 1.17m/s (S.T.P., wet), other conditions are the same with embodiment 4, test on the miniature performance testing device of the present invention.
Embodiment 6
With producing hole count on the same catalyzer monomer of embodiment 4 miniature performance tests is 3 * 3, length is 400mm, exhaust gas volumn is 2350.71 (l/h S.T.P., wet), face velocity (AV) be 24.76m/h (S.T.P., wet), linear velocity (LV) is 1.67m/s (S.T.P., wet), other conditions are the same with embodiment 4, carry out miniature test.
Embodiment 7
Selecting pitch is the catalyzer monomer of 10.0mm, is 385 ℃ with temperature, and linear velocity (LV) is 2.45m/s, and face velocity (AV) is the flue gas condition of 19.24m/h, carries out performance test on medium-sized (bench) performance testing device.
After the end of test (EOT), producing hole count on this catalyst test monomer is 2 * 2, length is the test unit sample of 360mm, keep and identical temperature and the face velocity (AV) of medium-sized (bench) test, linear velocity (LV) is under the condition of 0.89m/s, tests on the miniature performance testing device of the present invention.
Embodiment 8
Selecting pitch is the catalyzer monomer of 8.2mm, is 382 ℃ with temperature, and linear velocity (LV) is 2.82m/s, and face velocity (AV) is under the flue gas condition of 18.28m/h, carries out performance test on medium-sized (bench) performance testing device.
After the end of test (EOT), producing hole count on this catalyst test monomer is 3 * 3, length is the test unit sample of 341.1mm, keep and identical temperature and the face velocity (AV) of medium-sized (bench) test, linear velocity (LV) is under the condition of 0.97m/s, tests on the miniature performance testing device of the present invention.
Embodiment 9
Selecting pitch is the catalyzer monomer of 7.6mm, is 394 ℃ with temperature, and linear velocity (LV) is 2.79m/s, and face velocity (AV) is under the flue gas condition of 20.72m/h, carries out performance test on medium-sized (bench) performance testing device.
After the end of test (EOT), producing hole count on this catalyst test monomer is 3 * 3, length is the test unit sample of 300mm, keep and identical temperature and the face velocity (AV) of medium-sized (bench) test, linear velocity (LV) is under the condition of 1.02m/s, tests on the miniature performance testing device of the present invention.
Embodiment 10
Selecting pitch is the catalyzer monomer of 4.3mm, is 310 ℃ with temperature, and linear velocity (LV) is 2.47m/s, and face velocity (AV) is under the flue gas condition of 17.25m/h, carries out performance test on medium-sized (bench) performance testing device.
After the end of test (EOT), producing hole count on this catalyst test monomer is 5 * 5, length is the test unit sample of 200.8mm, keep and identical temperature and the face velocity (AV) of medium-sized (bench) test, linear velocity (LV) is under the condition of 1.08m/s, tests on the miniature performance testing device of the present invention.
It is the catalyzer monomer of 10.0mm that comparative example 1 is selected pitch, by embodiment 1 after carrying out performance test on medium-sized (bench) performance testing device, keep flue gas face velocity (AV) constant, changing linear velocity (LV) is 0.45m/s, tests on the miniature performance testing device of the present invention.Test condition is as follows:
Exhaust gas volumn: 1072.75 l/h (S.T.P., wet)
Temperature: 372 ℃
Oxygen content: 3.28 %
Liquid water content: 8.50 %
NO concentration: 319.3 vpm (S.T.P., wet)
SO
2Concentration: 403.1 vpm (S.T.P., wet)
Linear velocity (LV): 0.45 m/s (S.T.P., wet)
Face velocity (AV): 20.6 m/h (S.T.P., wet)
Comparative example 2 is produced sample on same catalyzer monomer, other conditions are the same with comparative example 1, and changing linear velocity (LV) is that (S.T.P. wet), tests on the miniature performance testing device of the present invention 0.65m/s.
Comparative example 3 is produced sample on same catalyzer monomer, other conditions are the same with comparative example 1, and changing linear velocity (LV) is that (S.T.P. wet), tests on the miniature performance testing device of the present invention 0.80m/s.
Comparative example 4 is produced sample on same catalyzer monomer, guarantee linear velocity (LV) be 0.85m/s (S.T.P., wet), other conditions are the same with embodiment 1, changing face velocity (AV) is that (S.T.P. wet), tests on the miniature performance testing device of the present invention 16m/h.
Comparative example 5 is produced sample on same catalyzer monomer, other conditions are the same with comparative example 4, and changing face velocity (AV) is that (S.T.P. wet), tests on the miniature performance testing device of the present invention 20m/h.
Comparative example 6 is produced sample on same catalyzer monomer, other conditions are the same with comparative example 4, and changing face velocity (AV) is that (S.T.P. wet), tests on the miniature performance testing device of the present invention 24m/h.
Test findings
Above-mentioned various catalyst test results and aberrations in property situation are listed in following table 1:
Table 1: various catalyst performance test findings
As shown in table 1, embodiment of the invention 1-3 is the sample on the same 10.0mm pitch catalyzer monomer, under guaranteeing that flue gas is by the face velocity (AV) of the catalyzer prerequisite identical with medium-sized test condition, respectively the linear velocity (LV) of flue gas by catalyzer be 0.85m/s (S.T.P., wet), 1.2m/s (S.T.P., wet), 1.6m/s (S.T.P. wet) tests under the condition, and the deviation of three's test result and medium-sized test result is in allowed band.Embodiment of the invention 4-6 is the sample on the same 7.6mm pitch catalyzer monomer, under guaranteeing that flue gas is by the face velocity (AV) of the catalyzer prerequisite the same with medium-sized test condition, be 0.88m/s (S.T.P. in the linear velocity (LV) of flue gas by catalyzer respectively, wet), 1.17m/s (S.T.P., wet), 1.67m/s (S.T.P., wet) test under the condition, their result error is also less.From top 6 embodiment as seen, test on different catalyst samples, the result well coincide with medium-sized test result.Embodiment of the invention 7-10 carries out miniature and medium-sized contrast test respectively on pitch is 10.0,8.2,7.6,4.3 same catalyst sample, their result error is also less.Comparative example 1-3 of the present invention guarantees that miniature test surfaces velocity conditions is identical with medium-sized test, be lower than 0.85m/s (S.T.P. in the linear velocity (LV) of flue gas by catalyzer, wet) change down, miniature test result increases with linear velocity, and bigger with medium-sized test result deviation.Comparative example 4-6 of the present invention guarantees that miniature p-wire speed (LV) is 0.85m/s (S.T.P., wet) under the constant situation, change flue gas face velocity (AV), test result reduces with the increase of flue gas face velocity (AV), bigger with medium-sized test result deviation, can not realize substituting of proving installation and method with this understanding.
Can confirm according to above-mentioned test, utilize miniature proving installation of the present invention and method, keep flue gas by face velocity (AV) face velocity of the catalyzer prerequisite identical with medium-sized test condition under, guarantee that the linear velocity (LV) of miniature test flue gas flue gas by catalyzer is greater than 0.85m/s (S.T.P., wet), the performance of its detecting catalyst is consistent with medium-sized test result.And it is simple in structure that the present invention has miniature proving installation, the exhaust gas volumn that the catalyst performance method of testing needs is little, the test duration is short, testing cost is low, can once test the advantage of 2 catalyst samples simultaneously, overcome the corresponding shortcoming of medium-sized proving installation and method.
Claims (6)
1. SCR catalyst for denitrating flue gas performance test methods is characterized in that may further comprise the steps:
(1) with high pure nitrogen, pressurized air, NO, SO
2, NH
3And H
2The O steam, each component content is consistent with catalyzer actual operating mode smoke components content;
(2) (1) step mixed flue gas is heated to flue-gas temperature under the catalyzer actual operating mode;
(3) with cross section 10 * 10mm～30 * 30mm, the catalyst sample of the length 100～400mm microreactor of packing into;
(4) under the following condition simulated flue gas after step (2) heating is being passed through step (3) reactor, A, flue gas flow 1～2Nm
3/ h (S.T.P., wet), B, the linear velocity LV by catalyzer greater than 0.85m/s (S.T.P., wet), C, identical with face velocity AV under the actual operating mode by the face velocity AV of catalyzer;
(5) temperature, pressure-detecting device and NO, the SO that installs respectively by the entrance and exit end of microreactor
2, SO
3, NH
3Sampler obtains data respectively and handles.
2. SCR catalyst for denitrating flue gas performance test methods according to claim 1 is characterized in that: described microreactor entrance and exit end NO concentration determination data are also determined the denitration efficiency of denitrating catalyst with chemiluminescence determination.
3. SCR catalyst for denitrating flue gas performance test methods according to claim 1 is characterized in that: described microreactor entrance and exit end SO
2And/or SO
3The concentration determination data are with oxidimetry mensuration and determine SO
2/ SO
3Conversion ratio.
4. SCR catalyst for denitrating flue gas performance test methods according to claim 1 is characterized in that: described microreactor entrance and exit end NH
3The concentration determination data are with neutralization titration mensuration and determine NH
3Removal efficiency.
5. SCR catalyst for denitrating flue gas performance testing device is characterized in that described proving installation comprises with the lower part:
(1) flue gas mixing arrangement is with high pure nitrogen, pressurized air, NO, SO
2, NH
3And H
2The O steam is synthesized and the consistent simulated flue gas of catalyzer actual operating mode smoke components;
(2) electrical heat exchanger is heated to flue-gas temperature under the catalyzer actual operating mode with the simulation mixed flue gas;
(3) microreactor, reactor are tubulose, diameter≤Φ 50mm, and dress cross section 10 * 10mm～30 * 30mm in the length 300～500mm, reactor, the catalyst sample of length 100～400mm, the simulated flue gas after the heating is by this reactor;
(4) proving installation is equipped with temperature, pressure-detecting device and NO, SO respectively at the entrance and exit end of microreactor
2, SO
3, NH
3Sampler;
Above-mentioned flue gas mixing arrangement, electrical heat exchanger, microreactor are installed in the thermostatic oven.
6. SCR catalyst for denitrating flue gas performance testing device according to claim 5, it is characterized in that: proving installation is at supporting 2 flue gas mixers of parallel installation, 2 electrical heat exchangers and 2 microreactors in the thermostatic oven of flue gas compounding system, once can carry out 2 identical catalyst performances tests of test condition simultaneously.
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| CN103969315A (en) * | 2014-05-09 | 2014-08-06 | 南通亚泰船舶工程有限公司 | Denitration catalyst detection device and method |
| CN104965050B (en) * | 2015-06-25 | 2016-10-12 | 苏州西热节能环保技术有限公司 | A kind of full-scale catalyst for denitrating flue gas device for detecting performance and detection method |
| CN105572291A (en) * | 2015-12-17 | 2016-05-11 | 云南电网有限责任公司电力科学研究院 | Catalyst activity detection method for boiler denitrification system |
| CN105628858A (en) * | 2016-03-21 | 2016-06-01 | 浙江海亮环境材料有限公司 | Catalyst performance testing system |
| CN109596375A (en) * | 2018-12-29 | 2019-04-09 | 河北省产品质量安全检测技术中心 | Heating furnace hot property and coal energy-saving agent, combustion adjuvant efficiency detection device and method |
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| CN101846663B (en) * | 2010-05-28 | 2011-12-21 | 浙江大学 | Rapid on-line diagnosis method for deactivation condition of SCR (selective catalytic reduction) denitration catalyst |
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