METHOD FOR DRYING CERAMIC PRODUCTS Russian patent published in 2021 - IPC C04B33/30 F26B3/04 F26B25/22 F26B21/06 G06N7/02 

FIELD: building materials; ceramics.

SUBSTANCE: invention relates to the field of technology associated with the burning of natural materials and products from them and can be used in the production of building materials, in particular ceramic bricks. The method of drying bricks consists in loading molded raw bricks onto trolleys, feeding the trolleys loaded with bricks into the drying chamber, heating and moistening them with a mixture of hot and cold air streams. The flow rate of hot or cold air is regulated by the degree of opening of the hot or cold air dampers. The trolleys are moved around the dryer. The temperature of the coolant and the brick is measured. A cart with brick is weighted at each position. The weight of the brick is compared with the weight reduction unit. The temperature is compared with a temperature set-point. Each layer of brick on the trolley is separated from each other by air layers to each of which a system of hot and cold air with adjustable dampers is supplied. Moreover, each layer of brick is equipped with temperature sensors and weight sensors. In this case, the automatic control of the drying process is carried out using fuzzy logic, for which a router with an antenna, adjustable control units for damper drives, a fuzzy controller containing a knowledge base and rules unit, a fuzzification unit, a logical unit, a defuzzification unit, an acceptance unit are additionally introduced into the drying system decisions and development of control actions. The reference graphs of the change in the temperature of the brick, the moisture content in the brick, the drying rate of a typical technological process proceeding in the normal mode specified by the technological documentation are removed, and the indicated graphs are entered into the block of the knowledge base and rules of the fuzzy controller. The moisture content of the brick is measured during the drying process by continuously monitoring the difference in the weight of the brick at different positions. The measurement results are fed through a router with an antenna to the input of a fuzzy microcontroller, in which the rate of moisture evaporation and the temperature difference between the medium and the brick are determined. This data is transferred to the fuzzification unit, where it is fuzzified, processed in a logical device based on the knowledge base and the rules embedded in the controller. After that, the obtained data is defuzzified, converted into control actions, which are fed to the input of the drives of the hot and cold air dampers and the operating modes of these drives are adjusted in the optimal direction of the process, in which a dynamic equilibrium is observed between the amount of moisture evaporated from the surface of the brick and the amount of moisture coming from the brick to its surface under the influence of diffusion processes.

EFFECT: simplification of the method of drying bricks, ensuring uniform drying of bricks along the height of the trolley.

1 cl, 1 ex, 7 dwg