US1538105A - Heating and drying apparatus - Google Patents

Description

May 1 9, 19251A l 1,538,105

- w. B. FULTON l HEATING AND DRYING APPARATUS Filed May e. 1921 Patented May 19, 1925.

WILLIAM B. FUL'L of "F MIDDLETOWN, OHIO.

HEATNG .AND DRYING APPARATUS.

Application filed May 6, 1921.

To all lwlw/m z' may concern:

Be it known that I. VILLIAM B. FULToN, a citizen of the United States, and resident of Middletown, county of Butler. aud State of Ohio. have invented certain neuand useful Improvements in Heating and Drying Apparatus, of which the `following is a tull. clear, concise, and exact description. reference being had to the accompanying drawings, forming a part oi this specification.

The present invention relates to drying apparatus to be used in the process of manufacturing paper or textiles. Such an apparatus usually consists of a plurality of rolls or other driers heated by steamv and 'the web oi material is caused to pass over the successive driers in Contact with their heated surfaces. lt is desirable to arrange the driers in groups and to maintain a dif` ference in steam or vapor pressure in the driers of' the diiterent groups. The first group oi' driers over which the web of inaterial passes is commonlyT called. the wet end of the machine and this group of driers is referred to herein as the primary group. The other group of driers is commonly called the dry end of the machine and this group of driers is referred to as the secondary group. have illustrated the invention as applied to a machine including only pri mary and secondary groups although it will be understood that the machine may be enlarged i'fdesired hy the addition of further groups of driers.

lt is an object of the present invent-ion to provide .a drying apparatus in which the driers may be heated efficiently by steam or other vapor and, in which a difference in.

pressure may' be maintained between the drier-s of successive groups. lt is also an ohject or" the invention to provide an apparatus of this kind which may be located partly in a basement or other limited space, .and it is a 'further object of the invention to provide means 'for eiiiciently relieving the apparatus of air and water of condensation.

In the drawings,-

Figure 1 is a side View of the apparatus, certain parts being shown in sect-ion.

Figure 2 is a view partly in section and partly inelevation of one of the driers and associated parts. y

The Web of material is presumed to be passing over the drier from right to left in Figure 1. The plurality of driers 7 disposed to the right of the valve 45, constitute the Serial No. 467,343.

primary group of driers or the wet end of the machine. The succeeding driers 8 constitute the secondary group of driers. The supply pipe 10 leads from a supply of steam under pressure and is connected by branches 11 with cachot the driers 8 of the secondary `sgroup. Each vdrier is provided With a pipe 1? opening from the lower part of the drier ami extending through the hollow1 trunnion 12 to a branch communicatingwith the discharge pipe 15. lt will beunderstood that the hollow trunnion 12 is so constructed as to permit the inlet of steam from the branch 11 and the egress of steam, air .nd Water of condensation through the p'ipe' 3 to the pipe permitting rotin,

15. While at the same -time tion of the drier 8. An illustrapive example of such a trunnion and connect on is shown'.

in my Patent No. 1,380,873 issuedIJuneL', 1921. l.

)In heating the driers 8 of the secondary group, the steam becomes reduced in pres' sure and with the air and. Water ocondensation passes out through the pipes'lv and 'their'.connected branches into the manifold.

15. A receiver 16 receives the discharge from the manifold 15 and in the drawing the receiver isillustrated as located in space and extending above the manifold 15 and the lower part of the lower tier "of driers or the secondary group. From a low point oi the manifold 15 a pipe 17 leads into a lower part of the receiver 16 While a vconnection 18 is made from the manifold-'15 to the upper part ofthe receiver. Water of condensation enters'the receiver through the pipe 17 and is ultimately discharged aslwill be described. .Steam'and air enter the upper part of the receiver through the connection 18. The steam and air are forced to pass down under a baille 20 in the receiver 'to the outlet 19, with which is connected a pipe 21 communicating with a pipe 22. A4The pipe 22 is provided with branches 23 conducting' the lowered pressure steam to the driers 7 of the primary group, while each drier 7 is also provided with a discharge pipe 25 leading to the discharge manifold 27. The driers 7 are provided with trunnions similar to those of the driers 8. lt is important to the cramped economical operation of the system that the discharge of steamV from the primary driers be restricted and this may be accomplished oy the provisieiiof steam traps 24 interposed inzrlthe: respective discharge branches 25. A lily-pass, iswprovided around each of the steam traps. Each bypass has a valve 36 normally restricted but which may be fully opened at the commencement of operation to secure circulation of steam through the various elements of the system. The air and water of condensation discharged rom the primary driers into the manifold 27 passes through the pipe 28 and the check valve 29 into the trap 30. The trap 30 isf provided with a float 3l and when the collected water reaches a pre-determined' level the float through valve mechanism 32 operates to open valve 33 in a steam line 34 whereby steam is admitted to carry the collected water to a boiler or other reservoir through the pipe 34.. To prevent the system from becoming ainbound an air vent 40 is connected with the pipe 28 between the trap-30 and the individual steam traps with which the primary-driers are equipped.

In orderv tov discharge from the receiver 16 water' of condensation drained from ther secondary driers I provide@ mechanism 41 arranged to operate whenrlthewater 1n the receiverreaehes a pre-determined level sofas to o enthe receiver to the'discharge pipe 43. hereupon, the steam pressure in the receiver forces the Water out of the receiver through the discharge pipe 43. The'amount of water collected in the receiver may be observed on the gauge 16".v

. The pipe 10 from whi h the driers of the secondary group are suppliedA with high pressure steam communicates with the lpipe 22 from which the vdriers of the primary grou are supplied with lou pressure steam whic has been exhausted from the secondary driers. The communication between the pipes 10 and 22,v however, is controlled by the valve 45 which may be entirely closed to prevent .communication between the two pipes or which may be regulated so as to maintain the pressure in the driers of the primary group at-fany desired difference bef low that inthe secondary group; It is important that a. desired pressure differential by maintained between the secondary and primary driers in order that the primary driers may operate efficiently, while at the the piping d same time the water of condensation may be discharged from the secondary driers. It would be practically impossible so to design of the system as always to maintain this esired differential and in the op eration ci the system various causes may alter the relations between the pressures in the twogroups. By regulation of the valve 45, however, communication between the high pressure pipe 10 and the VVpipe 22 may be accurately controlled so as to restore and maintain the desired differential between the pressures iii the secondary and,- rimary groups. A t the commencement o operations thevalve 45 should be entirely closed Y -on dary- Leseno ondary driers into the receiver 16.

Water Will be collected in the receiver while the air will be blown out into the pipe 22 and may be dischargedsby temporarily open ing the valve 50.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent of the United States, is

1. A drier system, comprising va primary group of drers, a secondary group of driers, means for supplying steam under ressure to the secondary group, means for discharging water of condensation from the secondary group and for conducting steamand air from the secondary group to the primar group, and a valve for maintaining a di ference in steam pressure between the sec- KGroup and the primary group.

2. drier system, comprising a primary group of driers, a secondary group of driers, means for supplying steam under pressure to lthe, secondary group, means or'dischar f ingr water of condensation from the secon' ary group'and for conducting steam and airv from the secondary group to the prim group, and an adjustable regulator for a mittinglsteam from the meansvfor supplying the secondary group directly te the primary group.

3. A drier system, comprising Vva r'imary group of driers, a secondary 'group o d'iers, means for supplyingstes/m under` pressure to the secondary group', Means for discharg- 1 ing ',water' of condensation fromthe secondary group and for conducting steam and air from the secondary group to the primary group, an adjustable regulator for admitting steam fromythe means for supplyf ing the secondary group directlyto the primary group, means for discharging ,air and water of condensation from the primary group, and means for restricting the escapev f nections to the primary group vto maintain a desired difference in pressure therein, and means for discharging water of condensation from the secondary group and for conducting steam and air from thesecondary group.

to the primary group.

5. A drier system, comprising a primary group of driers, a secondary groupof driers, 'a pipe connected with a supply' of steam` under pressure, connections from said-'pipe to the secondary group, connections from ipe said pipe to the primary group, an adjustable regulator in said pipe between the conso as to blow air and ivater from lthe secefmectons to the secondary group andthe 'focmaaier nections to the primary group, means for discharging water of condensation from the secondary group and for conducting steam and air from the secondary group to the primary group, means for discharging air and water of 'condensation from the primary group, and means for restrictingtlie escape of steam from the primary group.

6. A drier system, comprising a primary group of driers, a secondary group oi driers, means for supplying steam under pressure to the secondary group. a pipe for discharging steam, air and water of condensation from the secondary group, a receiver extend ing above'said pipe, a connection from said pipe tothe upper part of the receiver, a connection from saidpipe to a lower art of said receiver, and a pipe extending rom the upper part of the receiver and communicating with the primary group.

7. A. drier lsystem, comprising a primary group of driers, a secondary group of driers, means for supplying steam Aunder pressure to the secondary group, a pipe for discharging steam, air and water oi condensation from the secondary group, a receiver extending above said pipe, a connection from said pipe to the upper part of the receiver, a connection from said pipe to a lower part of said receiver,a pipe extending from the upper part of the receiver and communicating withrtlie primary group, means for discharging air and water of condensation from the primary group, and means for restricting the escape of steam from the primary group.

8. A drier system, comprising a primary group of driers, a secondary group of driers, means for supplying steam under pressure to the secondary group, a pipe for discharging steam, air and water of condensation from the secondary group, a receiver extending above said pipe, a connection from said pipe to the upper part of the receiver', a connection from said pipe to a lower part of said receiver, a pipe extending from the upper part of the receiver and communicab intr with the primary group', and an adjust able regulator for admitting steam from means for supplying the secondary directly to the primary group.

t). A drier system, comprising g group of driers, a secondary groinV` i. f means for supplying steam linde to the secondary group, a pipe discharging steam, air and water ci lensation `from the secondary group, vveiver extending above said pipe, a iection from said pipe to the upper par1 the receiver, a' connection from said pipe to a lower part of said receiver, a pipe extendingr from the upper part of the receiver and communieating with the primary group, means for discharging air and water of condensation Ifrom the primary group, means for restrict- Aing the escape of steam from the primary group, and an adjustable regulator for ad mitting steam from the means for suppiying the secondary group directiy to tire pri-1 mary group.

10. drier system. conuorisinpr a primary group of driers, a secondary group of, driers, aspipe connected wit'u asupplv ci steam under pressure, connections from pipe to' t'ne secondary group, connections from said pipe` in) the primary group, an adnstable regulator in said pipe between the connec tions to tbesecondary group and' the connec tions to the primary group, te pipe for dieM charging steam, air and water of condensation from the secondary grouppa receiver extending above said pipe, a connectirm from said pipe to the upper part of tbe-receiver, a connection from saidA pipe to a lower part of tirereceirer, a pipe eX- tending from the upper part of tbereceiver". and communicating with .primary C group.

1]. A drier system, comprising a primary group of driers, a secondarygronp ej? riers, a pipe connected with a supply or under'pressure, connect/'ons from said to the secondary group, connections from said pipe to the primary group, anY adju@- able regulator in said pipe between the connections to. the secondary group and the team connections to the primary, group, a pipeA for discharging steam, air-and water oi condensation from the'secondary group, a receiver extending above/'said pipe, a connection from said pipe to the upper part of the receiver, a connection from said` pipe to a lower part of the receiver, a pipe extending from the upper part of the receiver and communicating with the primary group,

a trap for discharging water of condensation from the primary group, means for re stricting the lescape of steam from the primar ou and an air vent between said trap and said restricting means.

12. A drier system, comprising a primary group of driers, a secondary group of driers, .uns for supplying steam under pressure io the secondary group, means for discharging water of condensation from the secondf ary group and for conducting steam and air from the secondary group to the primary group, and a valve so located that steam is supplied to all of the secondary driers before it reaches said valve and that it controls the pressure of the steam passing to all of the driers of the primary group, thus being adapted to maintain a di'erence in pressure between the secondary group and the primary group.

. 13.' A drier system, comprising a primary group of driers, a secondary group of driers, means for supplying steam under pressure to the secondary group, means for j :r masias sewndary group and flr conducting steam pressure between the scondary group lmdi) and air from the secoirlary group to the 'the' primary gruup a primary grolp, a receiver conncij/id to said In wness whereof, I hereunto subscribe nufzxns, mndY a valve 'so located tiit 'Steam is my name this 30th day f April', 1.921. supplied tofall of rthe secondary drershefore t'reaches said valve and'that it con- WM. BJ'FULTON. trois the pressure of the steam passing to Witnesses: all si fnhe drers of the primary group, thus f H; SERALE,

'being adapte to maintain a difference in H. KEMHL

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