METHOD OF BURNING WASTE WOOD AND DEVICE FOR METHOD EMBODIMENT WITH COMBUSTION CHAMBER AND METHOD OF LINING Russian patent published in 2002 - IPC

FIELD: heat power engineering; burning moisture-laden fuel, for example, log cuttings, plywood, veneer, barking, centers, in steamed state inclusive. SUBSTANCE: method includes recovery of heat; method consists in delivery of fuel to loading hole of combustion chamber followed by lighting-up and supply of air to combustion chamber, exhaust of flue gases through expansion chamber, heat exchanger, economizer, cyclone and smoke exhauster by adjustable exhaust flow of air; air is supplied to combustion chamber in two flows: from above through loading hole and directly to combustion zone through air intake passage. Air flow in combustion zone forms angle of from 0 to 90 deg. relative to direction of loading fuel into combustion chamber. Heat for production and other purposes is extracted by heat-transfer agent flowing in succession via tubes of economizer and heat exchanger by counter flow relative to motion of flue gases. While passing through heat exchanger, flue gas flow is laminar and while passing through economizer, flow is turbulent. Cleaning the flue gases from solid particles is effected at two stages: at first stage of heat extraction and after heat extraction. Device proposed for realization of said method is made in form of heat generator which includes combustion chamber with loading hole in upper part, expansion chamber, heat exchanger chamber, economizer chamber and adjustable exhaust unit which includes exhaust pipe, cyclone, smoke exhauster at variable capacity and gate valves; combustion chamber and expansion chamber are made in form of metal box-shaped pyramidal structures whose side walls are inclined at angle of 65 to 85 deg. On the outside they are provided with stiffeners and are lined with heat- insulating material from within; they are divided with vertical brickwork having hole for passage of flue gases. Combustion chamber is made in form of truncated pyramid whose vertex is directed downward; loading hole is found in upper part of said pyramid and air intake passage and hole for passage of flue gases is found in the bottom; wall with hole adjoins expansion chamber and is located vertically. Angles of inclination of remaining walls relative to level range from 65 to 85 deg. Air intake passage is located directly in combustion zone. Pyramidal structure is made from metal and is lined with heat-insulating material; vertical wall is made in form of brickwork with hole at area where said wall is connected with expansion chamber. Combustion chamber is divided into two zones at volumes V₁ and V₂; ratio between these volumes satisfies the following condition: V₂/V₁≥10, where V₁ - is volume of combustion zone bounded by horizontal plane at the top which is located at level of upper edge of hole for escape of combustion products; V₂ is volume of zone of fuel drying and partial pyrolysis above combustion zone. Lining procedure consists in securing bearing strips to inclined metal wall by welding and laying heat-insulating material over them; heat-insulating material in form of bricks shall be so positioned that horizontal projection of center of gravity of brick is farther from vertex of angle of inclination of metal wall as compared with horizontal projection of extreme point is rest of brick on bearing strip. EFFECT: enhanced efficiency of utilization of wastes without preliminary processing; enhanced efficiency of accumulation of heat for use in homes and in production. 11 cl, 2 dwg