Desulfurization and denitrification granular activated carbon strength evaluation method

Abstract

The invention discloses a desulfurization and denitrification granular activated carbon strength evaluation method, which comprises the following steps: weighing a certain mass of desulfurization and denitrification granular activated carbon, placing the desulfurization and denitrification granular activated carbon in a drum of coke 1/4 MKM drum strength test equipment, rotating the 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 greater than 5mm, namely,. the drum strength of the desulfurization and denitrification granular active carbon. According to the method for evaluating the strength of the desulfurization and denitrification granular activated carbon, the wear condition of the desulfurization and denitrification granular activated carbon in the transportation and application process is better simulated by utilizing the coke 1/4 MKM drum strength testing equipment, and the wear resistance and the compression strength of the activated carbon can be reflected at the same time through one-time detection; and the quality difference of different desulfurization and denitrification granular activated carbon can be distinguished more accurately.

Description

technical field [0001] The invention relates to the field of activated carbon quality measurement, in particular to a method for evaluating the strength of desulfurization and denitrification granular activated carbon. Background technique [0002] In traditional iron and steel enterprises that adopt the whole process, the sintering process will generate a large amount of sintering flue gas, and the removal of SO in the sintering flue gas 2 and NO x The methods mainly include wet desulfurization and denitrification, semi-dry desulfurization and denitrification, and dry desulfurization and denitrification. Among them, activated carbon dry desulfurization and denitrification not only has the characteristics of simple operation, stable desulfurization and denitrification, but also can remove various pollutants in flue gas. The application in the field of sintering flue gas purification and the purification efficiency are high; the principle of activated carbon flue gas purific...

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Problems solved by technology

[0003] However, no matter what process is adopted, the quality of activated carbon is the key factor for the successful operation of the activated carbon flue gas purification process, and how to accurately evaluate the quality of activated carbon is the key basis for selecting activated carbon products; the performance evaluation system for coal-based granular activated carbon for desulfurization and denitrification Among them, it mainly includes 8 kinds of detection indicators, namely: moisture, bulk density, particle size, wear resistance, compressive strength, ignition point, desulfurization value and denitrification rate; among them, the wear resistance and compressive strength reflect the mechanical strength of activated carbon particles , is closely related to the activated carbon loss rate of on-site process operation, can directly affect the operating cost of the system, and is a key influencing factor in the performance evaluation system of activated carbon products; currently, the test of the wear resistance and compressive strength of activated carbon for desulfurization and denitrification is mainly based on the method It is GB / T 30202.3-2013; this method has the following problems: 1. Activated carbon products need to test two indicators of wear resistance and compressive strength, and the workload is relatively large; 2. The sampling amount in this method is too small, and the test data is heavy. 3. The most important thing is that for premium products and first-class products, the difference in quality of activated carbon products cannot be accurately reflected, which is not conducive to the quality evaluation of activated carbon products

[0004] The prior art also involves some studies on carbon-related strength or wear resistance. For example, application number 201510012231.9 discloses a method for evaluating the strength of metallurgical coke after reaction. After the coke is heated to the lower limit of the reaction temperature range, it starts to pass The reaction atmosphere reacts, and the temperature rises at a constant rate during the reaction process, so that the temperature rises to the upper limit of the reaction temperature range at the end of the reaction. The flow rate of the auxiliary atmosphere remains unchanged during the reaction process. By adjusting CO and CO 2 The flow rate makes the actual weight loss rate of coke always match the weight loss rate calculated by the reaction until the coke reaches the set final weight loss rate. After the coke is cooled, the drum test is carried out to obtain the post-reaction strength of the coke; although this method is better The reaction process of coke in the blast furnace is simulated, so that the final value of the strength after the reaction can truly express the use state of the coke in the blast furnace, greatly reduce the cost of coal blending, and avoid overestimation of some coke properties, and finally reduce The cost of molten iron improves the quality of molten iron, but the reaction process in this method is completely different from the desulfurization and denitrification process, so it is not suitable for the characterization of the wear resistance of desulfurization and denitrification activated carbon

Another example is that the application number 201620933443.0 discloses a device for testing the wear resistance of activated carbon. The method of the device focuses on entering the equipment with water and activated carbon or pulp and activated carbon, thereby simulating the wear process of activated carbon in the gold production process, which can reflect the wear resistance of activated carbon. However, since the process simulated by this method is completely different from the desulfurization and denitrification process, it is not suitable for the characterization of the wear resistance of desulfurization and denitrification activated carbon

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