US1476424A - Circulation-regulating means for driers - Google Patents

Description

F. G. SARGENT CIRCULATION REGULATIG MEANS FOR DRIERS Filed March 5, 1922 i: li: 15 24 e5 24 15 24 24h/alud?? g Il n l ,l ll l 1 Smm Patented Dec.. 4, 1923.

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FREDERICK G. SARGENT, O FWESTFORD, MASSACHUSETTS, SSEGNOR T0 C. G. SAR- GENTS SCNS CORPORATION, A CORPCRATION 0F MASSACHUSETTS.

.application led March 3, 1922.

To all whom t may concern:

lle it known that L Fnnnemoii G. SAR- onxr, a citizen of the United States, residing at lVestford in the county of Middlesex e and State of Massachusetts, have invented a new and useful Circulation-Regulating Means for Driers, of 'which the following is a specification.

This invention relates to a drier tor lila-ous materials, such as cotton, Wool and the like. f

'l`he principal objects of the invention are to provide means connected with each partition in the'drier for-regulating the direction ot the circulation of air through the sections adjacent thereto; to provide dampers for regulating the intake of air for one or more sections, and variable means extending longitudinally of each section for controlling the circulation ot' air from the coil heating box into the top of the drier and.

combined with means for regulating the recirculation ofthe air down through the coil box; and to provide means whereby-.the latter two devices are connected to operate iu unison so that ywhen the air is admitted from the drier into the top of the coil box it will be prevented from going into the coil box from the exterior. advantages of the invention will appear hereinafter.

l'let'erenre is to be had to the accompanying dra\vings,' in which v Fig. l is av plan of a drier comprising a plurality ot endless aprons with a preferred embodiment of this invention applied thereto;

Fig. 2 is a side View of the same partly inv section, and

Fig. 3 is a sectional view on the line 3-3 ot' Fig. 1.

As stated l have shown the invention as applied to a drier of Jthat type in which a plurality of endless aprons 10, 11 and l2 ol' open mesh material are used to convey the loose fibrous material through the drier from one end to the other, and in which the air is caused to circulate up through the aprons with the liber on them by means oi one or more fans 13. These aprons are located in a long main body 14: constituting the principal part ot the drier, and'this body is divided up b v a plurality7 of partitions 15 having openings throng them for the aprons and their contents so as to protitl Further objects and CIECULATION-REGULATING MEANS FOR DRIERS.

Serial (No, 540,892.

vide compartments in which the air can be made to circulate in any desired Way.

At one side of the main body 14C is a compartment 16 in which the fans are located with their driving shafts. These fans in the present form are at the bottom and they torce air through the side up through the aprons and up through the outlet 18. ln the upper part ol. the compartment 16 are coils of pipes 17 for the circulation of steam for heatingpurposes. This compartment 16 is usually called the coil box. As so far described this drier is of a well known type.

For the admission of air into the drier from outside, l provide one or more openings 21 controlled by pivoted dampers 20. 'lhese are located along the top of the outer Wall of the coil box 16. They'constitute the only openings in the present instance through which the air is admitted from the outer atmosphere to the drier. The air drawn in in this Wav is drawn immediately down through the pipe coils 179 heated and forced up by the fans through the material to be dried as the arrows indicate.

l have also provided a series of passages 22 like the openings 21 over the Walls 23 which separate the main body 14e from the coil box 16. These are controlled hy a plurality of dampers 24 parallel with. the dampers 20. lll/hen these dampers 2d are opened some ot' the air drawn up through the aprons will be directed back into the compartment 16 and down between the steam pipes l? to be heated again, its moisture evaporated, and forced back up through the material to be dried. Each damper 20 is exactly opposite a damper 24 of the same height and length. in pairs and the dampeis of each pairare connected with each other by an operating rod 25. lach ot these operating rods is connected with a lever or handle 26 tor operating it. and the connection is such that these dainpeis 2() and 24 are operated in unison. lll/hen the damper 20 is closed and the damper 2l is open, the current of air coming rdown through thecoil box necessitates the drawing in ot the air trom the upper part of the main drying chamber lil7 ln other words, they are arranged i aty but when air is desired to be drawln in the others, but usually they .are operated so as to work together..

In order to regulate the conditions in the several sections of the driers separated by the vertical transverse partitions 15, I' have provided atthe top of each of them a space y or opening adapted to be controlled by a transverse damper 27. This is pivoted and arranged like the others and can be operated in any desired way. These dampers 27 are usually closed whenthe dampers 24 are open because then it is not desired that the air in the top ofl each compartment shall pass out through the outlet 18.

By the use of aregulating arrangement of this character the circulation of the air in the drier is under the control of the operator at all times, and he can use the air over and over as many times as can be done before it becomes' saturated, thus introducing a material economy in the use ofthe heat which is applied, and this action-can be regulated in any way that proves to be vdesirable so as to avoid waste of the heat in evaporating too much moisture from the air at times. Although I have illustrated and described only a single form of the invention I 'lam aware of the fact that modifications can be made therein by any person skilled in the art without departing from the scope of the invention as expressed in the claims. Therefore, I do not wish to be limited to all the details of construction herein .shown and de-A scribed, but what I do claim is 1. In a drier, the combination of a main enclosed casing, means therein for conveying the material to be dried, agsteam coil, means for forcing the air from-the steam coil through the drier, means whereby the air to be circulated through the steam coil can be drawn into it either fronithe exterior or from the space over the aprons in the drier, and means for preventing the air entering rom either whenever it is permitted to enter from the other. l

2. In a drier, .theV4 combination of 'a main' enclosed casing, a series of endless aprons therein for conveying the material to be dried, a steam coil box, means for forcing the air from the steam coil box, through the aprons in the drier, a pair of sets of air inlets along the tops of the walls or partitions, one of which sets separates the drier proper from the coil box,` and the other of which constitutes the exterior wall of said coil box,

and means for simultaneously operating the two dampers of a pair to close one when the other is open.

3. In a drier, the combination of a 'main enclosed casing or frame, a series of endless aprons therein for conveying the material to be dried,a steam coil box for heating the drier, means for forcing the air from the steam coil box up through the aprons in the drier, means whereby the air to be circulated through the steam coils can be drawn into them either from the exterior or from the space over the aprons in the drier, said main drier being provided with transverse partitions for dividing it into sections, an outlet from one of said sections, a series of openings at the top of said partitionst'or permittingcirculation of air from all of them to said outlet, and dampers over said partitions for closing the openings and forcing the air to go back through the coil box.

4:. In a drier, the combination of a series c of aprons therein for conveying the material to be dried, a steam coil box, means for forcing the air from the steam coil through the drier, said "main drier being provided with transverse partitions for dividing it into sections, an outlet from one of said sections,

a series of openings at the top of saidpartitions for permitting circulation of air from all of them to said outlet, and dampers over said partitions for closing the openings and forcing the air to go back through the coil box.

In testimony whereofl I have hereunto aHixed my signature.

y FREDERICK G. SARGENT.

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