HEAT EXCHANGER FOR PRELIMINARY HEATING OF LIQUID MANURE Russian patent published in 2003 - IPC

FIELD: heating cold and foam agents containing solid particles and gases by means of hot liquid. SUBSTANCE: proposed heat exchanger includes intermediate heaters (1a, 1b) mounted in succession and provided with horizontal tube 2 having heat-conducting wall where agent is circulating from one end to other and concentric tubular casing 3 surrounding tube 2 where hot liquid is positively circulated in direction opposite to direction of motion of said agent; mounted coaxially inside tube 2 is revolving shaft 4 with helicoid brush 40 forming worm feeder engageable with inner wall of tube 2. EFFECT: enhanced efficiency. 10 cl, 4 dwg