CN113804567B - Intensity evaluation method for desulfurization and denitrification granular activated carbon - Google Patents
Intensity evaluation method for desulfurization and denitrification granular activated carbon Download PDFInfo
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 249
- 238000006477 desulfuration reaction Methods 0.000 title claims abstract description 102
- 230000023556 desulfurization Effects 0.000 title claims abstract description 102
- 238000011156 evaluation Methods 0.000 title description 20
- 238000000034 method Methods 0.000 claims abstract description 53
- 239000000571 coke Substances 0.000 claims abstract description 36
- 238000012360 testing method Methods 0.000 claims abstract description 29
- 238000007873 sieving Methods 0.000 claims description 5
- 239000002245 particle Substances 0.000 abstract description 32
- 238000005299 abrasion Methods 0.000 abstract description 15
- 238000001514 detection method Methods 0.000 abstract description 12
- 238000005303 weighing Methods 0.000 abstract description 4
- 229910052799 carbon Inorganic materials 0.000 description 15
- 238000005070 sampling Methods 0.000 description 13
- 238000006243 chemical reaction Methods 0.000 description 12
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 9
- 239000003546 flue gas Substances 0.000 description 9
- 238000010998 test method Methods 0.000 description 7
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- 238000005245 sintering Methods 0.000 description 5
- 239000000428 dust Substances 0.000 description 4
- 238000000746 purification Methods 0.000 description 4
- 239000000779 smoke Substances 0.000 description 4
- 238000001179 sorption measurement Methods 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 3
- 238000013441 quality evaluation Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- 230000004580 weight loss Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 229910001385 heavy metal Inorganic materials 0.000 description 2
- 238000011068 loading method Methods 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000009897 systematic effect Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- HGUFODBRKLSHSI-UHFFFAOYSA-N 2,3,7,8-tetrachloro-dibenzo-p-dioxin Chemical compound O1C2=CC(Cl)=C(Cl)C=C2OC2=C1C=C(Cl)C(Cl)=C2 HGUFODBRKLSHSI-UHFFFAOYSA-N 0.000 description 1
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000003197 catalytic effect Effects 0.000 description 1
- 238000010531 catalytic reduction reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000011112 process operation Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000012216 screening Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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- 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
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- 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
- G01N3/32—Investigating strength properties of solid materials by application of mechanical stress by applying repeated or pulsating forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N5/00—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid
- G01N5/04—Analysing materials by weighing, e.g. weighing small particles separated from a gas or liquid by removing a component, e.g. by evaporation, and weighing the remainder
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0001—Type of application of the stress
- G01N2203/0005—Repeated or cyclic
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/0014—Type of force applied
- G01N2203/0026—Combination of several types of applied forces
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/026—Specifications of the specimen
- G01N2203/0284—Bulk material, e.g. powders
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N2203/00—Investigating strength properties of solid materials by application of mechanical stress
- G01N2203/02—Details not specific for a particular testing method
- G01N2203/06—Indicating or recording means; Sensing means
- G01N2203/067—Parameter measured for estimating the property
- G01N2203/0676—Force, weight, load, energy, speed or acceleration
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Abstract
The invention discloses a method for evaluating the intensity of desulfurization and denitrification granular activated carbon, which comprises the steps of weighing a certain mass of desulfurization and denitrification granular activated carbon, placing the desulfurization and denitrification granular activated carbon in a rotary drum of coke 1/4 Mikemu rotary drum intensity test equipment, rotating the rotary drum at a constant rotating speed for a certain number of revolutions, standing for a period of time, and measuring the ratio of the desulfurization and denitrification granular activated carbon larger than 5mm to obtain the rotary drum intensity of the desulfurization and denitrification granular activated carbon. According to the method for evaluating the intensity of the desulfurization and denitrification particle activated carbon, disclosed by the invention, the abrasion condition of the desulfurization and denitrification activated carbon in the transportation and application processes is better simulated by using coke 1/4 Mikemu drum intensity test equipment, the abrasion resistance and the compressive strength of the activated carbon can be simultaneously reflected through one-time detection, and the quality difference of different desulfurization and denitrification particle activated carbons can be more accurately distinguished.
Description
Technical Field
The invention relates to the field of activated carbon quality measurement, in particular to a desulfurization and denitrification particle activated carbon strength evaluation method.
Background
In the traditional iron and steel enterprises adopting the whole process, a large amount of sintering flue gas can be generated in the sintering process, and SO in the sintering flue gas is removed 2 And NO x The method mainly comprises wet desulfurization and denitrification, semi-dry desulfurization and denitrification and dry desulfurization and denitrification, wherein the active carbon dry desulfurization and denitrification has the characteristics of simple operation, stable desulfurization and denitrification and the like, and can remove various pollutants in the flue gas, so that the method has higher application and purification efficiency in the field of sintering flue gas purification; the principle of activated carbon flue gas purification is mainly as follows: firstly, removing most of smoke (powder) dust and heavy metal substances from smoke generated by a sintering machine through an electric dust remover, and then introducing the smoke into a plurality of relatively independent adsorption towers of an active carbon smoke purifying device through a booster fan; in the adsorption tower, the flue gas passes through the grid layer filled with activated carbon particles, and the dust and SO can be treated by utilizing the large specific surface area of the activated carbon and a large number of micropores 2 Physical or chemical adsorption and removal are carried out on the substances, and simultaneously, the catalytic activity of the active carbon is utilized, and ammonia gas and NO in the flue gas are blown x Generating nitrogen and water by catalytic reduction reaction, and finallyRealize the simultaneous removal of dust and SO 2 、NO x The purpose of various pollutants such as dioxin, heavy metals and the like, and the adsorbed activated carbon is sent to an analysis tower by a conveyor; active carbon in the analytic tower is N 2 Heating to 400 ℃ or above under atmosphere for regeneration, wherein the analyzed gas contains 20-40% of SO 2 The regenerated active carbon after cooling and sieving can be returned to the adsorption tower for continuous recycling; at present, according to the running directions of the activated carbon bed and the flue gas flow, the activated carbon desulfurization and denitrification process can be divided into two types of cross-flow type and counter-flow type.
However, whatever process is adopted, wherein the quality of the activated carbon is a key factor for successful operation of the activated carbon flue gas purification process, and how to accurately evaluate the quality of the activated carbon is a key basis for selecting an activated carbon product; the performance evaluation system for the coal particle activated carbon for desulfurization and denitrification mainly comprises 8 detection indexes, namely: moisture, bulk density, particle size, abrasion resistance, compressive strength, ignition point, desulfurization value, and denitration rate; the wear resistance and the compressive strength reflect the mechanical strength of the activated carbon particles, are closely related to the loss rate of the activated carbon in the on-site process operation, can directly influence the operation cost of the system, and are key influencing factors in the performance evaluation system of the activated carbon product; currently, the main basis method for testing the wear resistance and compressive strength of the active carbon for desulfurization and denitrification is GB/T30202.3-2013; the method has the following problems: 1. the active carbon product needs to test two indexes of wear resistance and compressive strength, and has large workload; 2. the sampling amount in the method is too small, and the repeatability of test data is poor; 3. the most critical is that the quality difference of the activated carbon product cannot be accurately reflected aiming at the superior product and the primary product, and the quality evaluation of the activated carbon product is not facilitated.
In the prior art, the research on the strength or wear resistance of the carbon is also related, for example, application number 201510012231.9 discloses an evaluation method of strength after metallurgical coke reaction, wherein the coke is heated to the lower limit value of the reaction temperature range and then starts to be reacted in the reaction atmosphere, the temperature is uniformly increased in the reaction process, the temperature is just increased to the upper limit value of the reaction temperature range when the reaction is finished, and the reaction processThe flow of the auxiliary atmosphere is unchanged by adjusting CO and CO 2 The actual weight loss rate of the coke is always attached to the reaction to calculate the weight loss rate until the coke reaches the set final weight loss rate, and the reacted coke is cooled and then subjected to a drum test to obtain the strength of the coke after the reaction; although the method better simulates the reaction process of coke in the blast furnace, the finally obtained value of the intensity after reaction can truly express the use state of the coke in the blast furnace, greatly reduces the coal blending cost, can avoid overestimation of certain coke performances, finally reduces the molten iron cost and improves the molten iron quality, the reaction process is completely different from the desulfurization and denitrification process, and is not suitable for representing the wear resistance of the desulfurization and denitrification active carbon. As another example, application number 201620933443.0 discloses an active carbon wear resistance testing device, the method of the device focuses on that water and active carbon or ore pulp and active carbon enter equipment together, so that the wear process of the active carbon in the gold production process is simulated, and the wear resistance of the active carbon can be reflected; however, the process simulated by the method is completely different from the desulfurization and denitrification process, so that the method is not suitable for representing the wear resistance of the desulfurization and denitrification active carbon.
In view of the above, it is necessary to develop an evaluation method suitable for the intensity of the desulfurization and denitrification activated carbon, which better simulates the abrasion condition of the desulfurization and denitrification activated carbon in the transportation and use process, not only can reflect the abrasion resistance and compressive strength of the activated carbon, but also can more accurately distinguish the quality differences of different desulfurization and denitrification granular activated carbons.
Disclosure of Invention
Aiming at the defects existing in the prior art, the invention aims to provide a desulfurization and denitrification particle activated carbon strength evaluation method, which utilizes coke 1/4 Mikum drum strength test equipment to better simulate the abrasion condition of desulfurization and denitrification activated carbon in the transportation and use process, can reflect the abrasion resistance and compressive strength of the activated carbon at the same time, and can more accurately distinguish the quality difference of different desulfurization and denitrification particle activated carbon.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
a method for evaluating the intensity of the activated carbon particles for desulfurization and denitrification includes such steps as weighing the activated carbon particles for desulfurization and denitrification, putting it in the drum of 1/4-meter drum intensity test equipment, rotating it at a constant speed for a certain number of revolutions, laying aside for a certain period of time, and measuring the ratio of activated carbon particles for desulfurization and denitrification greater than 5 mm.
Preferably, the certain mass is 1kg + -0.005 kg.
Preferably, the constant rotational speed is 25r/min.
Preferably, the certain rotation number is 400 rotations.
Preferably, the period of time is 1 to 2 minutes.
Preferably, the ratio of desulfurization and denitrification granular activated carbon is measured to be greater than 5.6 mm.
Preferably, the desulfurization and denitrification granular activated carbon with the diameter of more than 5.6mm is obtained by sieving through a round-hole sieve with the diameter of 5.6 mm.
Preferably, the inner diameter of a drum of the coke 1/4 Mikuhm drum strength testing device is 1m, and the effective length of the drum is 0.25m;
the inner wall of the coke 1/4 Mikum drum strength testing device is provided with 4 baffle plates which are uniformly distributed, the height of each baffle plate is 100mm, the thickness of each baffle plate is 5.6mm, and the length of each baffle plate is 0.25m;
the motor power of the coke 1/4 Mikum drum strength testing equipment is 1.5-2.2 kw.
The beneficial effects of the invention are as follows:
1. according to the desulfurization and denitrification particle activated carbon strength evaluation method, wear conditions of desulfurization and denitrification activated carbon in the transportation and application processes are better simulated by using coke 1/4 Mikemu drum strength test equipment, and the wear resistance and the compressive strength of the activated carbon are reflected through one-time detection;
2. according to the desulfurization and denitrification particle activated carbon strength evaluation method, the original sampling amount of a sample is 20 times of the sampling amount in GB/T30202.3-2013 coal-made particle activated carbon test method for desulfurization and denitrification, so that systematic errors caused by sampling amount errors are greatly reduced, and the detection value of the desulfurization and denitrification particle activated carbon strength evaluation method is more representative and has stronger reproducibility;
3. the method for evaluating the intensity of the desulfurization and denitrification granular activated carbon can be used for directly carrying out random sampling without sample shrinkage, and compared with GB/T30202.3-2013 test method for preparing the desulfurization and denitrification granular activated carbon, the method for evaluating the intensity of the desulfurization and denitrification granular activated carbon has the advantages that the analysis steps are reduced, and the detection time of an activated carbon sample is shortened;
4. compared with GB/T2006-2008 'determination method of mechanical strength of Coke', the original sampling amount of the sample in the desulfurization and denitrification particle activated carbon strength evaluation method is far lower than the sampling amount of the coke drum strength, is 1/10 or even 1/100 of the sample amount required by determination of the coke drum strength, and greatly reduces the labor intensity of detection personnel;
5. according to the method for evaluating the intensity of the desulfurization and denitrification particle activated carbon, disclosed by the invention, the friction between the activated carbon and the drum wall, the friction between the activated carbon and the process that the activated carbon is lifted to a high position by a baffle plate and then falls down continuously occur along with the rotation of the drum in the drum of the coke 1/4 Mikuhm drum intensity test equipment, so that the transportation, loading and unloading processes of the activated carbon product after leaving the factory and the movement processes in a desulfurization and denitrification system are fully simulated, the abrasion process of the desulfurization and denitrification activated carbon product can be more accurately represented, and the method has more practical significance for comprehensive evaluation of the intensity evaluation of the desulfurization and denitrification particle activated carbon;
6. the method for evaluating the intensity of the desulfurization and denitrification granular activated carbon can greatly reduce misjudgment on product quality caused by system errors, provides a more accurate product quality evaluation basis, avoids repeated labor, further reduces detection cost, and can be used as an effective way for enterprises and users to reduce the running cost of a desulfurization and denitrification system.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the present invention, but are not intended to limit the invention in any way.
A method for evaluating the intensity of desulfurization and denitrification granular activated carbon comprises the steps of weighing a certain mass of desulfurization and denitrification granular activated carbon, placing the desulfurization and denitrification granular activated carbon in a rotary drum of coke 1/4 Mikum rotary drum intensity testing equipment, rotating the rotary drum at a constant rotating speed for a certain number of revolutions, standing for a period of time, and measuring the ratio of the desulfurization and denitrification granular activated carbon which is larger than 5mm to obtain the rotary drum intensity of the desulfurization and denitrification granular activated carbon; the ratio of the desulfurization and denitrification granular activated carbon of more than 5.6mm is preferably measured.
The specific implementation method comprises the following steps: directly and randomly weighing m 0 The method comprises the steps of placing (1 kg+/-0.005 kg (accurate to 1 g) of desulfurization and denitrification granular activated carbon into a rotary drum of rotary drum coke 1/4 Mikemu rotary drum strength testing equipment, rotating the rotary drum at a constant rotating speed of 25r/min, stopping rotating the rotary drum after 400 revolutions, standing for 1-2 min, screening the rotated desulfurization and denitrification granular activated carbon by using a round hole sieve with the diameter of 5.6mm to obtain desulfurization and denitrification granular activated carbon with the diameter of more than 5.6mm, and measuring the mass of the desulfurization and denitrification granular activated carbon with the diameter of more than 5.6mm to be m 1 Dividing the weight of the desulfurization and denitrification granular activated carbon greater than 5.6mm by the original weight of the desulfurization and denitrification granular activated carbon sample can obtain the ratio of the desulfurization and denitrification granular activated carbon greater than 5.6mm (ratio of desulfurization and denitrification granular activated carbon=m 1 /m 0 *100 percent of the drum strength of the desulfurization and denitrification granular activated carbon, and the drum strength can simultaneously react with the wear resistance and the compressive strength of the desulfurization and denitrification granular activated carbon.
Wherein m is randomly weighed 0 Sample amount of 1kg (accurate to 1 g) of desulfurization and denitrification granular activated carbon is most suitable, and is also reproducible for the method, so m is randomly weighed 0 =1 kg (accurate to 1 g) of desulfurization and denitrification granular activated carbon is optimal.
Wherein the inner diameter of a drum of the coke 1/4 Mikum drum strength testing device is 1m, and the effective length of the drum is 0.25m; the inner wall of the coke 1/4 Mikum drum strength testing device is provided with 4 baffle plates which are uniformly distributed, the height of each baffle plate is 100mm, the thickness of each baffle plate is 5.6mm, and the length of each baffle plate is 0.25m; the motor power of the coke 1/4 Mikum drum strength testing equipment is 1.5-2.2 kw.
The method for evaluating the strength of the desulfurization and denitrification granular activated carbon according to the present invention is further described below with reference to specific examples.
Example 1
1kg plus or minus 0.005kg (accurate to 1 g) of unknown desulfurization and denitrification particle activated carbon samples A and B are respectively and randomly weighed, the weighed samples are placed into a rotary drum by using the coke 1/4 Mikuhm rotary drum strength testing equipment, the rotary drum is set to rotate at the rotating speed of 25r/min for 400 revolutions, then the rotation is stopped, and the static state is kept for 1-2 min; sieving the rotated desulfurization and denitrification particle activated carbon by adopting a round hole sieve with the diameter of 5.6mm, measuring the weight of a desulfurization and denitrification particle activated carbon sample with the diameter of more than 5.6mm, and calculating the drum strength of the desulfurization and denitrification particle activated carbon sample; sample a and sample B were tested successively for three parallel samples, respectively, with the results of the drum strength being shown in table 1;
meanwhile, carrying out wear resistance tests on a sample A and a sample B by using GB/T30202.3-2013 'test method of coal-made granular activated carbon for desulfurization and denitrification', and respectively setting three continuous parallel samples, wherein the results of the wear resistance are shown in Table 1;
table 1 drum strength and abrasion resistance of samples a and B
As is evident from Table 1, the average drum strength of sample B was 7.0% lower than that of sample A, whereas the average wear resistance only reflects that sample B was 0.8% lower than sample A; from the standard deviation of the drum intensities of the sample A and the sample B and the standard deviation of the wear resistance, the standard deviation of the drum intensities of the sample A and the sample B is obviously lower than the standard deviation of the wear resistance, so that the dispersion degree of the drum intensities of the sample A and the sample B is lower, which indicates that the reproducibility of the drum intensities of the sample A and the sample B is stronger.
Example 2
1kg plus or minus 0.005kg (accurate to 1 g) of unknown desulfurization and denitrification particle activated carbon samples A and C are respectively and randomly weighed, the weighed samples are placed into a rotary drum by using the coke 1/4 Mikuhm rotary drum strength testing equipment, the rotary drum is set to rotate at the rotating speed of 25r/min for 400 revolutions, then the rotation is stopped, and the static state is kept for 1-2 min; sieving the rotated desulfurization and denitrification particle activated carbon by adopting a round hole sieve with the diameter of 5.6mm, measuring the weight of a desulfurization and denitrification particle activated carbon sample with the diameter of more than 5.6mm, and calculating the drum strength of the desulfurization and denitrification particle activated carbon sample; sample a and sample C were tested successively for three parallel samples, respectively, with the results of the drum strength being shown in table 1;
simultaneously, carrying out abrasion resistance tests on a sample A and a sample C by adopting GC/T30202.3-2013 'test method of coal-made granular activated carbon for desulfurization and denitrification', and respectively setting three continuous parallel samples, wherein the abrasion resistance results are shown in Table 2;
table 2 drum strength and abrasion resistance of samples a and C
As is evident from Table 2, the average drum strength of sample C is 2.5% lower than that of sample A, whereas the average wear resistance only reflects that sample C is 1.8% lower than sample A; from the standard deviation of the drum intensities of the sample A and the sample C and the standard deviation of the abrasion resistance, the standard deviation of the drum intensities of the sample A and the sample C is obviously lower than the standard deviation of the abrasion resistance, so that the dispersion degree of the drum intensities of the sample A and the sample C is lower, and the repeatability of the drum intensities of the sample A and the sample C is stronger.
The method for evaluating the intensity of the desulfurization and denitrification granular activated carbon is fully proved by combining the embodiment 1 and the embodiment 2, has better data representativeness compared with GB/T30202.3-2013 test method for coal-made granular activated carbon for desulfurization and denitrification, can embody the difference of similar products of different activated carbon factories, and can provide more scientific judgment for enterprises and users.
According to the desulfurization and denitrification particle activated carbon strength evaluation method, wear conditions of desulfurization and denitrification activated carbon in the transportation and application processes are better simulated by using coke 1/4 Mikemu drum strength test equipment, and the wear resistance and the compressive strength of the activated carbon are reflected through one-time detection; according to the desulfurization and denitrification particle activated carbon strength evaluation method, the original sampling amount of a sample is 20 times of the sampling amount in GB/T30202.3-2013 test method of desulfurization and denitrification coal-made particle activated carbon, so that systematic errors caused by sampling amount errors are greatly reduced, and the detection value of the desulfurization and denitrification particle activated carbon strength evaluation method is more representative and has stronger reproducibility; the method for evaluating the intensity of the desulfurization and denitrification granular activated carbon can be used for directly carrying out random sampling without sample shrinkage, and compared with the existing GB/T30202.3-2013 test method for coal-made granular activated carbon for desulfurization and denitrification, the method for evaluating the intensity of the desulfurization and denitrification granular activated carbon has the advantages that the analysis steps are reduced, and the detection time of an activated carbon sample is shortened; compared with GB/T2006-2008 'determination method of mechanical strength of Coke', the original sampling amount of the sample in the desulfurization and denitrification particle activated carbon strength evaluation method is far lower than the sampling amount of the coke drum strength, is 1/10 or even 1/100 of the sample amount required by determination of the coke drum strength, and greatly reduces the labor intensity of detection personnel; according to the method for evaluating the intensity of the desulfurization and denitrification granular activated carbon, the granular activated carbon is in the rotary drum of the coke 1/4 Mikuhm rotary drum intensity testing equipment, along with the rotation of the rotary drum, the friction between the activated carbon and the drum wall, the friction between the activated carbon and the process that the activated carbon is lifted to a high position by the baffle and then falls down are continuously generated, so that the transportation, loading and unloading processes of the activated carbon products after leaving the factory and the movement processes in a desulfurization and denitrification system are fully simulated, the abrasion process of the desulfurization and denitrification activated carbon products can be more accurately represented, and the method has more practical significance for the comprehensive evaluation of the intensity evaluation of the desulfurization and denitrification granular activated carbon; the method for evaluating the intensity of the desulfurization and denitrification granular activated carbon can greatly reduce misjudgment on product quality caused by system errors, provides more accurate product quality evaluation basis, avoids repeated labor, further reduces detection cost, and can be used as an effective way for enterprises and users to reduce the running cost of a desulfurization and denitrification system.
In view of the foregoing, the embodiments are only for illustrating the technical solution of the present invention and not for limiting the same, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present invention may be modified or substituted without departing from the spirit and scope of the technical solution of the present invention, and the scope of the claims of the present invention should be covered.
Claims (2)
1. A method for evaluating the intensity of the desulfurization and denitrification granular activated carbon is characterized in that 1kg plus or minus 0.005kg of desulfurization and denitrification granular activated carbon is weighed and placed in a rotary drum of coke 1/4 Mikuhm rotary drum intensity test equipment, the rotary drum rotates for 400 turns at a constant rotation speed of 25r/min, and then stands for 1-2 min, the ratio of the desulfurization and denitrification granular activated carbon with the intensity larger than 5.6mm is measured, namely the rotary drum intensity of the desulfurization and denitrification granular activated carbon is obtained,
the inner diameter of a drum of the coke 1/4 Mikum drum strength testing device is 1m, and the effective length of the drum is 0.25m;
the inner wall of the coke 1/4 Mikum drum strength testing device is provided with 4 baffle plates which are uniformly distributed, the height of each baffle plate is 100mm, the thickness of each baffle plate is 5.6mm, and the length of each baffle plate is 0.25m;
the motor power of the coke 1/4 Mikum drum strength testing equipment is 1.5-2.2 kw.
2. The method for evaluating the strength of the desulfurization and denitrification granular activated carbon according to claim 1, wherein the desulfurization and denitrification granular activated carbon with the diameter of more than 5.6mm is obtained by sieving through a round-hole sieve with the diameter of 5.6 mm.
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