CN110044754B - Honeycomb denitration catalyst abrasion resistance experimental device and experimental method - Google Patents
Honeycomb denitration catalyst abrasion resistance experimental device and experimental method Download PDFInfo
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- CN110044754B CN110044754B CN201910225420.2A CN201910225420A CN110044754B CN 110044754 B CN110044754 B CN 110044754B CN 201910225420 A CN201910225420 A CN 201910225420A CN 110044754 B CN110044754 B CN 110044754B
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- 238000005299 abrasion Methods 0.000 title claims abstract description 49
- 239000003054 catalyst Substances 0.000 title claims abstract description 46
- 238000002474 experimental method Methods 0.000 title claims abstract description 23
- 239000000463 material Substances 0.000 claims abstract description 38
- 238000005303 weighing Methods 0.000 claims abstract description 14
- 239000000428 dust Substances 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 4
- 230000001105 regulatory effect Effects 0.000 claims description 26
- 238000007789 sealing Methods 0.000 claims description 21
- 210000003298 dental enamel Anatomy 0.000 claims description 3
- 239000002245 particle Substances 0.000 claims description 3
- 238000007747 plating Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 claims description 2
- 230000008569 process Effects 0.000 claims description 2
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract description 4
- 239000007789 gas Substances 0.000 abstract description 4
- 230000005484 gravity Effects 0.000 abstract description 4
- 238000011056 performance test Methods 0.000 abstract description 3
- 239000000126 substance Substances 0.000 abstract description 3
- 238000012360 testing method Methods 0.000 abstract description 3
- 229910052757 nitrogen Inorganic materials 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- MWUXSHHQAYIFBG-UHFFFAOYSA-N nitrogen oxide Inorganic materials O=[N] MWUXSHHQAYIFBG-UHFFFAOYSA-N 0.000 description 3
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 238000010531 catalytic reduction reaction Methods 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 230000035945 sensitivity Effects 0.000 description 2
- 238000003916 acid precipitation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N3/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N3/56—Investigating resistance to wear or abrasion
- G01N3/565—Investigating resistance to wear or abrasion of granular or particulate material
Abstract
The invention relates to an abrasion resistance experimental device and an experimental method for a honeycomb denitration catalyst, which are mainly used for testing physical and chemical properties of the denitration catalyst containing nitrogen polluted gas. The invention comprises a fan, a venturi converging device, a cyclone separator, a sample bin, a comparison bin, a spiral feeder, a feed box, a weighing device and a bag-type dust remover; the fan is connected with the venturi confluence device, the venturi confluence device is connected with the cyclone separator, the weighing device is arranged at the lower part of the cyclone separator, the upper part of the cyclone separator is connected with the bag-type dust remover, the sample bin and the comparison bin are both connected with the venturi confluence device, the spiral feeder is connected with the sample bin, and the material box is connected with the spiral feeder. According to the honeycomb denitration catalyst abrasion resistance experimental device and method, the abrasion working condition of a honeycomb catalyst in the actual operation of the catalyst can be simulated, the abrasion caused by the fact that abrasion materials are differentially abraded on different stress surfaces of a catalyst sample due to the influence of gravity is eliminated, and the accuracy of abrasion resistance performance test is affected.
Description
Technical Field
The invention relates to an abrasion resistance experimental device and an experimental method for a honeycomb denitration catalyst, which are mainly used for testing physical and chemical properties of the denitration catalyst containing nitrogen polluted gas.
Background
NO x Is one of main atmospheric pollutants causing acid rain, haze and other harmful substances, and is typical NO in thermal power generation enterprises and industrial boiler use enterprises x A source of gas generation. China is opposite to NO x The emission of gas has strict industry standard and national standard, and the selective catalytic reduction SCR (Selective Catalytic Reduction) denitration technology is the main technology which is most applied at home and abroad and is used for removing nitrogen oxides in the flue gas. The catalyst is used as the core of SCR denitration technology and is mainly divided into three types of honeycomb catalyst, flat plate catalyst and corrugated plate catalyst, wherein the honeycomb catalyst is most applied in China, and the wear-resistant physicochemical property of the honeycomb catalyst directly influences the denitration efficiency and the running condition of a flue gas denitration system.
The current experimental detection device for the honeycomb denitration catalyst is mainly a device introduced in a patent CN204630873 'honeycomb catalyst abrasion resistance evaluation device' and a similar device thereof. The experiment tables in the devices are all horizontally built, when the catalyst abrasion resistance test is carried out, abrasion materials are influenced by gravity, larger abrasion deviation can be caused on the upper surface and the lower surface of the catalyst, and the abrasion resistance of the catalyst cannot be well reacted. Secondly, the abrasion materials adopted are all finer gravel materials, and the whole experiment platform is in a positive pressure state, so that environmental pollution can be caused.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provide a honeycomb denitration catalyst abrasion resistance experimental device and method with reasonable structural design.
The invention solves the problems by adopting the following technical scheme: this honeycomb denitration catalyst experimental apparatus that wears resistance, its structural feature lies in: comprises a fan, a venturi converging device, a cyclone separator, a sample bin, a comparison bin, a spiral feeder, a feed box, a weighing device and a bag-type dust remover; the fan is connected with the venturi confluence device, the venturi confluence device is connected with the cyclone separator, the weighing device is arranged at the lower part of the cyclone separator, the upper part of the cyclone separator is connected with the bag-type dust collector, the sample bin and the comparison bin are connected with the venturi confluence device, the spiral feeder is connected with the sample bin, and the material box is connected with the spiral feeder.
Further, a first openable sealing device and a second openable sealing device are respectively arranged on the sample bin and the comparison bin.
Further, the device also comprises an air supply pipe, a pipeline, a converging pipeline, a material containing pipeline, a clean air pipe, a feeding pipeline and a fine ash pipeline; the fan and the venturi are connected through the blast pipe, the venturi is connected through the pipe with the cyclone, the cyclone is connected through fine ash pipe with the bag dust collector, one end of the sample bin and one end of the comparison bin are connected through the pipe with the venturi, the other end of the sample bin and the other end of the comparison bin are respectively connected with the material containing pipe and the clean blast pipe, the spiral feeder is connected with the material containing pipe, and the material box is connected with the spiral feeder through the feeding pipe.
Further, a first regulating valve is arranged on the air supply pipe, a second regulating valve and a first anti-blocking type differential pressure gauge are arranged on the material containing pipeline, and a third regulating valve and a second anti-blocking type differential pressure gauge are arranged on the air purifying pipe.
Further, no. two governing valves, screw feeder, no. one prevent stifled differential pressure gauge and sample storehouse and pass through the material containing pipeline along the air current direction in proper order and connect, no. three governing valves, no. two prevent stifled differential pressure gauge and contrast storehouse pass through clean tuber pipe along the air current direction in proper order and connect.
Further, an inlet convergent pipeline of the venturi converging device is connected with the air supply pipe, an outlet divergent pipeline of the venturi converging device is connected with the pipeline, and a middle throat pipe of the venturi converging device is connected with the converging pipeline.
Further, the weighing device is arranged at the bottom of the cyclone separator, and the fine ash pipeline is connected with the top of the cyclone separator.
Further, another technical object of the present invention is to provide an experimental method of the honeycomb denitration catalyst abrasion resistance experimental device.
The technical purpose of the invention is achieved by the following technical scheme.
An experimental method of a honeycomb denitration catalyst abrasion resistance experimental device is characterized by comprising the following steps: the experimental method is as follows: respectively opening the first openable sealing device and the second openable sealing device, placing a sample into a sample bin, placing a comparison sample into a comparison bin, and respectively covering and sealing the first openable sealing device and the second openable sealing device; after the first regulating valve, the second regulating valve and the third regulating valve are opened, the fan is started; under the action of negative pressure generated by the Venturi confluence device, air respectively enters a material-containing pipeline and a clean air pipe, the opening of a second regulating valve and a third regulating valve are regulated according to the readings of a first anti-blocking differential pressure gauge and a second anti-blocking differential pressure gauge, so that the air speed passing through a sample bin and a comparison bin meets the experimental requirement, and then a spiral feeder is started, so that experimental abrasion materials enter the sample bin through the material-containing pipeline to carry out abrasion experiments on samples; the abrasion materials are collected in a converging pipeline together with air passing through a comparison bin after passing through a sample bin, then enter a venturi converging device, and sequentially pass through a cyclone separator, a fine ash pipeline and a bag-type dust collector through the pipeline, wherein larger particles are collected by the cyclone separator and fall into a weighing device to be weighed.
Further, the junction of the middle throat pipe and the converging pipeline of the venturi converging device is negative pressure.
Further, enamel plating or wear-resistant treatment processes are adopted at the elbow of the converging pipeline and the throat of the venturi converging device.
Compared with the prior art, the invention has the following advantages: according to the honeycomb denitration catalyst abrasion resistance experimental device and the honeycomb denitration catalyst abrasion resistance experimental method, the abrasion working condition of a honeycomb catalyst in the actual operation of the catalyst can be simulated, the abrasion caused by the fact that abrasion materials are differentially abraded on different stress surfaces of a catalyst sample due to the influence of gravity is eliminated, and the accuracy of abrasion resistance performance test is affected; meanwhile, the venturi converging device enables the parts of the whole device which are easy to generate leakage pollution to be in a negative pressure state, so that the pollution of the experimental device to the environment is effectively avoided; furthermore, the anti-blocking differential pressure gauge with high sensitivity is selected as the pressure gauge, so that the reliability of the differential pressure gauge is effectively improved.
Drawings
Fig. 1 is a schematic structural diagram of an abrasion resistance experimental device for a honeycomb denitration catalyst according to an embodiment of the present invention.
In the figure: fan 1, venturi confluence device 2, cyclone 3, sample bin 4, comparison bin 5, screw feeder 6, feed box 7, weighing device 8, bag dust collector 9, no. one governing valve 11, no. two governing valves 12, no. three governing valves 13, no. one openable sealing device 14, no. two openable sealing devices 15, blast pipe 21, pipe 22, confluence pipe 23, containing pipe 24, clean blast pipe 25, feeding pipe 26, fine ash pipe 27, no. one anti-blocking differential pressure gauge 31, no. two anti-blocking differential pressure gauge 32.
Detailed Description
The present invention will be described in further detail by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and not limited to the following examples.
Examples
Referring to fig. 1, it should be understood that the structures, proportions, sizes, etc. shown in the drawings attached hereto are merely used in conjunction with the disclosure of the present specification and should not be construed as limiting the scope of the present invention, which is defined by the appended claims, and any structural modifications, proportional changes, or adjustments of size, which may fall within the scope of the present disclosure without affecting the efficacy or achievement of the present invention. In the present specification, the terms "upper", "lower", "left", "right", "middle" and "a" are used for descriptive purposes only and are not intended to limit the scope of the invention, but are also intended to be within the scope of the invention without any substantial modification to the technical content.
The honeycomb denitration catalyst abrasion resistance experimental device in the embodiment comprises a fan 1, a venturi confluence device 2, a cyclone separator 3, a sample bin 4, a comparison bin 5, a screw feeder 6, a material box 7, a weighing device 8, a bag-type dust remover 9, an air supply pipe 21, a pipeline 22, a confluence pipeline 23, a material containing pipeline 24, a clean air pipe 25, a feeding pipeline 26 and a fine ash pipeline 27.
The blower 1 in the embodiment is connected with the venturi confluence device 2, the venturi confluence device 2 is connected with the cyclone separator 3, the weighing device 8 is arranged at the lower part of the cyclone separator 3, the upper part of the cyclone separator 3 is connected with the bag-type dust remover 9, that is, the weighing device 8 is arranged at the bottom of the cyclone separator 3, and the fine ash pipeline 27 is connected with the top of the cyclone separator 3; the sample bin 4 and the comparison bin 5 are respectively provided with a first openable sealing device 14 and a second openable sealing device 15; the sample bin 4 and the comparison bin 5 are both connected with the venturi confluence device 2, the screw feeder 6 is connected with the sample bin 4, and the feed box 7 is connected with the screw feeder 6.
In normal cases, the fan 1 is connected with the venturi confluence device 2 through the blast pipe 21, the venturi confluence device 2 is connected with the cyclone 3 through the pipeline 22, the cyclone 3 is connected with the bag-type dust collector 9 through the fine ash pipeline 27, one end of the sample bin 4 and one end of the comparison bin 5 are connected with the venturi confluence device 2 through the confluence pipeline 23, the other end of the sample bin 4 and the other end of the comparison bin 5 are respectively connected with the material containing pipeline 24 and the clean blast pipe 25, the spiral feeder 6 is connected with the material containing pipeline 24, and the material box 7 is connected with the spiral feeder 6 through the feeding pipeline 26.
The blast pipe 21 in the embodiment is provided with a first regulating valve 11, the material containing pipeline 24 is provided with a second regulating valve 12 and a first anti-blocking differential pressure gauge 31, and the clean blast pipe 25 is provided with a third regulating valve 13 and a second anti-blocking differential pressure gauge 32; the second regulating valve 12, the screw feeder 6, the first anti-blocking differential pressure gauge 31 and the sample bin 4 are sequentially connected through the material containing pipeline 24 along the air flow direction, and the third regulating valve 13, the second anti-blocking differential pressure gauge 32 and the comparison bin 5 are sequentially connected through the clean air pipe 25 along the air flow direction.
In the embodiment, an inlet convergent pipe of the venturi confluence device 2 is connected with an air supply pipe 21, an outlet divergent pipe of the venturi confluence device 2 is connected with a pipe 22, and a middle throat pipe of the venturi confluence device 2 is connected with a confluence pipe 23; the junction of the middle throat pipe of the venturi confluence device 2 and the confluence pipeline 23 is negative pressure; the elbow of the converging pipe 23 and the throat of the venturi converging device 2 are treated by enamel plating or wear-resistant treatment.
The experimental method of the honeycomb denitration catalyst abrasion resistance experimental device in this embodiment is as follows: opening the first openable sealing device 14 and the second openable sealing device 15 respectively, placing a sample into the sample bin 4, placing a comparison sample into the comparison bin 5, and respectively covering the first openable sealing device 14 and the second openable sealing device 15 and sealing; after opening the first regulating valve 11, the second regulating valve 12 and the third regulating valve 13, opening the fan 1; under the negative pressure effect generated by the Venturi confluence device 2, air respectively enters the material containing pipeline 24 and the clean air pipe 25, the opening of the second regulating valve 12 and the third regulating valve 13 is regulated according to the indication numbers of the first anti-blocking differential pressure gauge 31 and the second anti-blocking differential pressure gauge 32, so that the air speed passing through the sample bin 4 and the comparison bin 5 meets the experimental requirement, and then the spiral feeder 6 is started, so that the experimental abrasion materials enter the sample bin 4 through the material containing pipeline 24 to carry out abrasion experiments on samples; the abrasion materials are collected in a converging pipeline 23 together with air passing through a comparison bin 5 after passing through a sample bin 4, then enter a venturi converging device 2, sequentially pass through a cyclone separator 3, a fine ash pipeline 27 and a bag-type dust collector 9 through a pipeline 22, wherein larger particles are collected by the cyclone separator 3 and fall into a weighing device 8 to be weighed.
According to the honeycomb denitration catalyst abrasion resistance experimental device and the honeycomb denitration catalyst abrasion resistance experimental method, the abrasion working condition of a honeycomb catalyst in the actual operation of the catalyst can be simulated, the abrasion caused by the fact that abrasion materials are differentially abraded on different stress surfaces of a catalyst sample due to the influence of gravity is eliminated, and the accuracy of abrasion resistance performance test is affected; meanwhile, the venturi confluence device 2 ensures that the parts of the whole device which are easy to generate leakage pollution are in a negative pressure state, thereby effectively avoiding the pollution of the experimental device to the environment; furthermore, the anti-blocking differential pressure gauge with high sensitivity is selected as the pressure gauge, so that the reliability of the differential pressure gauge is effectively improved.
In addition, it should be noted that the specific embodiments described in the present specification may vary from part to part, from name to name, etc., and the above description in the present specification is merely illustrative of the structure of the present invention. All equivalent or simple changes of the structure, characteristics and principle according to the inventive concept are included in the protection scope of the present patent. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions in a similar manner without departing from the scope of the invention as defined in the accompanying claims.
Claims (8)
1. A honeycomb denitration catalyst experimental apparatus that wears to wear, its characterized in that: the device comprises a fan (1), a venturi converging device (2), a cyclone separator (3), a sample bin (4), a comparison bin (5), a screw feeder (6), a feed box (7), a weighing device (8), a bag-type dust collector (9), an air supply pipe (21), a pipeline (22), a converging pipeline (23), a material containing pipeline (24), a clean air pipe (25), a feeding pipeline (26) and a fine ash pipeline (27); the utility model discloses a cyclone separator, sample bin (4) and contrast storehouse (5) are connected through converging pipeline (23), sample bin (4)'s the other end and contrast storehouse (5) are connected with material containing pipeline (24) and clean tuber pipe (25) respectively, spiral feeder (6) are connected with material containing pipeline (24), workbin (7) are connected with spiral feeder (6) through feed pipeline (26) with cyclone separator (3) through pipeline (22), cyclone separator (3) are connected through thin grey pipeline (27) with sack cleaner (9), sample bin (4)'s one end and contrast storehouse (5)'s one end and venturi are joined (2) and are connected, sample bin (4)'s the other end and contrast storehouse (5) the other end is connected with material containing pipeline (24) and clean tuber pipe (25) respectively.
2. The honeycomb denitration catalyst abrasion resistance experiment device according to claim 1, wherein: install a governing valve (11) on blast pipe (21), install No. two governing valves (12) and No. one anti-blocking differential pressure gauge (31) on containing material pipeline (24), install No. three governing valves (13) and No. two anti-blocking differential pressure gauge (32) on clean blast pipe (25).
3. The honeycomb denitration catalyst abrasion resistance experiment device according to claim 2, characterized in that: no. two governing valves (12), screw feeder (6), no. one prevent stifled differential pressure gauge (31) and sample storehouse (4) are connected through containing pipeline (24) along the air current direction in proper order, no. three governing valves (13), no. two prevent stifled differential pressure gauge (32) and contrast storehouse (5) are connected through clean tuber pipe (25) along the air current direction in proper order.
4. The honeycomb denitration catalyst abrasion resistance experiment device according to claim 1, wherein: the inlet convergent pipeline of the venturi converging device (2) is connected with the air supply pipe (21), the outlet divergent pipeline of the venturi converging device (2) is connected with the pipeline (22), and the middle throat pipe of the venturi converging device (2) is connected with the converging pipeline (23).
5. The honeycomb denitration catalyst abrasion resistance experiment device according to claim 1, wherein: the weighing device (8) is arranged at the bottom of the cyclone separator (3), and the fine ash pipeline (27) is connected with the top of the cyclone separator (3).
6. An experimental method based on the honeycomb denitration catalyst abrasion resistance experimental device as set forth in any one of claims 1 to 5, characterized in that: the experimental method is as follows: opening the first openable sealing device (14) and the second openable sealing device (15) respectively, placing a sample into the sample bin (4), placing a comparison sample into the comparison bin (5), and respectively covering the first openable sealing device (14) and the second openable sealing device (15) and sealing; after a first regulating valve (11), a second regulating valve (12) and a third regulating valve (13) are opened, the fan (1) is started; under the negative pressure effect generated by the Venturi confluence device (2), air respectively enters a material containing pipeline (24) and a clean air pipe (25), the opening degrees of a second regulating valve (12) and a third regulating valve (13) are regulated according to the indication numbers of a first anti-blocking differential pressure gauge (31) and a second anti-blocking differential pressure gauge (32), the wind speed passing through a sample bin (4) and a comparison bin (5) meets the experimental requirement, and then a spiral feeder (6) is started, so that experimental abrasion materials enter the sample bin (4) through the material containing pipeline (24) to carry out abrasion experiments on samples; the abrasion materials are collected in a converging pipeline (23) together with air passing through a comparison bin (5) after passing through a sample bin (4), then enter a venturi converging device (2), sequentially pass through a cyclone separator (3), a fine ash pipeline (27) and a bag-type dust collector (9) through a pipeline (22), wherein larger particles are collected by the cyclone separator (3) and fall into a weighing device (8) to be weighed.
7. The experimental method of the honeycomb denitration catalyst abrasion resistance experimental device according to claim 6, characterized in that: the joint of the middle throat pipe of the venturi converging device (2) and the converging pipeline (23) is negative pressure.
8. The experimental method of the honeycomb denitration catalyst abrasion resistance experimental device according to claim 6, characterized in that: and the elbow part of the converging pipeline (23) and the throat part of the venturi converging device (2) adopt enamel plating or wear-resistant treatment processes.
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110749523A (en) * | 2019-10-16 | 2020-02-04 | 华电电力科学研究院有限公司 | Denitration catalyst abrasion strength detection device and working method thereof |
| CN113358511A (en) * | 2021-05-14 | 2021-09-07 | 华电电力科学研究院有限公司 | Experimental device and method for abrasion resistance of denitration catalyst to dust-containing flue gas |
| CN113358510A (en) * | 2021-05-14 | 2021-09-07 | 华电电力科学研究院有限公司 | Denitration catalyst wear resistance evaluation device and test method |
| CN113533022B (en) * | 2021-07-14 | 2023-06-23 | 华电电力科学研究院有限公司 | Multi-test-bin honeycomb catalyst wear resistance evaluation test method |
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