Patent GB-685327-A (GB)
Title: Apparatus for use in drying or conditioning cereal grain and other granular or pulverulent material
IPC: F26B17/14
Filed: 1950-07-25
Abstract: 685,327. Drying apparatus. CARR, J. B., and HANDLEY, C. G. July 12, 1951 [July 25, 1950], No. 18496/50. Class 34 (ii) In grain drying apparatus of the kind described in Specification 592,418 having sections each comprising two confronting L-shaped chambers the said sections are replaced by sections each comprising four L- shaped chambers confronting one another in pairs arranged one above the other and around the grain passage, one limb of one of the chambers of one pair being an inlet limb and one limb of one of the chambers of the other pair being an outlet limb, the arrangement being such that the upper two L-shaped chambers are turned through a quarter turn relative to the two lower chambers. Each section comprises inner walls 1, 2, 3, 4 confronting outer walls 5, 6, 7, 8 and walls 9, 10, 11, 12 connect the edges of walls 5 and 6, 6 and 7 &c. to form chamfered corners. At the corners the inner walls extend across the interwall spaces at 1a, 2a, 3a, 4a. The chambers between walls 1, 5 and 3, 7 are divided by longitudinally disposed inclined plates 13, 14 into upper and lower limbs and triangular plates 13a, 14a constitute end section of the plates 13, 14 to fit in diagonally opposite corners of the section, the wall extensions 1a, 3a being cut.away to accomodate these inclined cornerplates 13a, 14a This arrangement is such that the limb on the A side above the plate 13 is in direct communication with the full depth outer chamber on the B side but is blocked at its opposite end by the wall extension 4a from the outer full depth chamber on the D side whilst the limb on the A side below plate 13 is blocked from the outer chamber on the B side by the extension la and is in direct communication with the outer chamber on the D side. Similarly the limb on C side above the plate 14 communicates with the full depth D side but is blocked at its opposite end by the extension 2a from the outer chamber on B side whilst the limb on C side below plate 14 is blocked from the D side outer chamber but is open to the B side outer chamber. Two rows of inverted troughs 16, 17 disposed at right angles to one another extend across the grain passage, the lower row 16 affording communication with B side chamber but being closed at the other end by wall 4 and the upper or outlet troughs 17 being closed at one end by wall 1 but in communication with the upper chamber on C side. In the erection of a number of sections one upon another to build a drying column each section is displaced 90 degrees anticlockwise relative to the section below so that air may be admitted through any B or C side and the arrangement is such that the B space is connected with the space on the A side of the section above and so on through the column forming in effect a spiral inlet manifold ascending anticlockwise as seen in plan. Similarly the interwall space on the D side of any section communicates directly with the C side space above the partition 14 of the same section and with the C side space of the section below forming in effect a spiral exhaust manifold ascending the column anticlockwise between the convolutions of the inlet manifold. The inlet troughs of any section are thus parallel to the outlet troughs of the section below. The column may be divided into larger sections such as sweating sections and cooling sections by the use of masking plates.