Convectiv drying of disperesd materials before the thermochemical processing

Drying of wood materials is one of the most important processes not only of wood processing, but also of many other industries. Drying processes involve the removal of moisture as a result of a phase transition from a liquid or solid to a gaseous state. This is due to the high energy intensity and duration of the process, especially for colloidal materials. The latter is due to the fact that with intensive drying the quality of the finished product often decreases, for example, when drying lumber cracks and warps occur, which is unacceptable in the manufacture of thermally modified products. In cases of thermochemical processing of dispersed materials, the quality of raw materials is determined only by the final moisture content of dispersed materials.Questions of heat and mass transfer during the drying of materials were carried out by Girsh M., Lykov A.V., Lurye M.V., Sazhin B.S., Dolinsky A.A., Golubev L.G., Rudobashta S.P., Shubin G.S., Romankov PG, Ginzburg A.S., Mikhailov N.V., Mushtayev VI. and etc. The paper deals with convective technology of dispersive materials. The zone of convective drying of dispersed materials is presented. Experimental and mathematical modeling of the drying process of wet dispersed materials before thermochemical processing was carried out. The results of theoretical and experimental studies of changes in temperature and humidity in the drying bin are presented. The nature of changes in temperature and humidity of dispersed particles in a drying bin was determined. The effective height of the layer in the counter-current dryer is determined by calculation, depending on the moisture content of the fuel and the temperature of the exhaust flue gases.

1. Timerbaeva AL. Review of technical solutions for the implementation of the process of heattreatment of shreddedwood .Wood Industry. 2017;1:57-63.

2. Safin RG. Installation for the production of charcoal Pat 2582696 of the Russian Federation, IPC C10B 1/04. Declare 29. 12. 2014.publ. 27.04.2016.

3. Mettler MS. Top ten fundamental challenges of biomass pyrolysis for biofuels. Energy Environ Science. 2012(5): 797-809.

4. Taymarov MA, Timerbaev NF., Khusnullin II., Shulaev MV. Energy-saving installation for thermochemical decomposition of waste woodworking enterprises. Proceedings of the higher educational institutions. Energy sector problems. 2012;3-4:88-93.

5. Timerbaev NF. Modeling the process of direct-flow gasification of wood waste .Bulletin of Kazan University of Technology. 2011. № 7.

6. Tuntsev DV. Processing of wooden sleepers by thermal method . Wood industry.2018;3:61-66.

7. Antal MJ. Biomass pyrolysis: a review of the literature. Pt I. Carbohydratel pyrolysis. Advance. In solat Energy. 1983. pp.61-111.

8. Timerbaev NF. Technology and equipment for the electric power use of wood waste. Proceedings of the higher educational institutions. Energy sector problems. 2017;19(1-2):102-107.

9. Timerbaev NF. The current state of charcoal production. Proceedings of the higher educational institutions. Energy sector problems. 2017;19(1-20):102-107.

10. Sadrtdinov AR., Sattarova ZG., Prosvirnikov DB., Tuntsev DV. Modeling of thermal treatment of wood waste in the gasifiers . Proceedings of 2015 International Conference on Mechanical Engineering, Automation and Control Systems, MEACS 2015. pp. 741- 914.

11. Tuntsev DV. The mathematical model of fast pyrolysis of wood was. In 2015 Int. Conf. on Mechanical Engineering, Automation and Control Systems (MEACS). pp 1-4. doi: 10.1109/MEACS.2015.7414929.

12. Safin RG. Mathematical model of heat and mass transfer processes occurring during the processing of wood waste. Bulletin of Kazan Technological University. 2015;18(3):161-163.

13. Kostyleva EE. Thermal drying, a saway toin creasethe efficiency of sludgesludge combustion. Bulletin of Kazan State Energy University. .2018;10(2): 73-80.

14. Gatina, RZ. Prospect sfor the development of small energy using fuelcells. Bulletin of Kazan State Energy University. 2018;10(1): 88-96.

15. Khabibullina AR. Convective drying of wood waste before the pyrolysis stage. Collection of scientific articles of the First International Lykov scientific readings dedicated to the 105th anniversary of Academician A.V. Lykov "Actual problems of drying and heat and moisture treatment of materials in various industries and agriculture". Moscow, 2015.pp. 328-330.