A Catalyst Aided Design Method Based on Digital Mirroring
An auxiliary design and catalyst technology, applied in chemical instruments and methods, separation methods, dispersed particle separation, etc., can solve the problems of long numerical simulation calculation time, difficult operation, difficult adjustment of settings, etc., to avoid long calculation cycle time Effect
Active Publication Date: 2021-05-28
SOUTHEAST UNIV +1
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However, for this method of adjusting the inlet wind speed and reducing agent distribution in advance, the numerical simulation calculation time is long, it is difficult to adjust the settings, the method is cumbersome and complicated, and it is not easy to operate on site
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[0032] The present invention will be further described below in conjunction with the accompanying drawings and specific implementation examples.
[0033] A catalyst-aided design method based on digital mirror images, comprising the following steps:
[0034] 1) Establish a catalyst single-channel model, and perform numerical simulations based on the model to obtain the influence of operating parameters on its denitrification performance; after establishing the SCR catalyst single-channel model, give different initial input parameters for the model, and the simulation speed range is 3- 8m / s, the range of ammonia nitrogen ratio is 0.8-1.2, the temperature range is 270-360℃, the inlet NO concentration range is 50-500mg / m 3 , a total of 1250 samples; according to different input parameters, numerical simulation was carried out to obtain output parameters such as ammonia escape rate and outlet NO concentration;
[0035]2) SCR catalyst inlet parameter, outlet parameter are used as t...
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The invention develops a catalyst aided design method based on digital image, which belongs to the technical field of coal-fired denitrification, and comprises the following steps: establishing a catalyst single-channel model, and using multiple groups of different conditions to perform numerical simulation and analysis on the single-channel model; A large number of results obtained from the simulation, the BP neural network model and the database are established; finally, the output parameters under the corresponding input conditions are searched by the database to obtain the corresponding flow field conditions; The condition of the exit parameter is obtained, and the upper-level exit parameter is used as the lower-level entry parameter. The present invention avoids the problems of long calculation period of numerical simulation and the information stored in the database is too idealized, and realizes the simulation of the catalyst under the conditions of uneven flow field and uneven concentration field, so as to provide catalyst design, operation optimization, Provide basis for reinstallation, provide guidance for catalyst design and reinstallation, and operation optimization of SCR denitrification system.
Description
technical field [0001] The invention belongs to the technical field of coal-fired denitrification, and in particular relates to a catalyst aided design method based on a digital image. Background technique [0002] At present, my country's requirements for the emission limits of coal-fired boiler pollutants are becoming more and more stringent. Most coal-fired power plants are equipped with SCR denitrification systems to meet the NO x emission requirements. Restricted by site, layout and other factors, the space for SCR denitrification system transformation is limited, and the distance between flue gas and SCR reductant to fully mix is limited, so the distribution of flow field and concentration field entering the reactor is prone to deviation. [0003] In addition, the design and operation of some SCR equipment is not carried out in the early stage of boiler design, but is installed later to meet the requirements of national environmental protection regulations. This ma...
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IPC IPC(8): B01D53/88B01D53/56
CPCB01D53/8625B01D53/88
Inventor 司风琪李佩蔚董云山江晓明
Owner SOUTHEAST UNIV