DE2035883C3 - Process of solidifying molten sulfur - Google Patents

Description

The invention relates to a method of solidifying molten sulfur by he dem at one or preferably several successive points or several layers upper run of an endless conveyor belt is continuously fed, which runs along one in a loading Container located Kühlbadcs from an aqueous medium essentially in contact with this Bathroom is run.

In a known system of the aforementioned type (USA.-Patentsehrift 1 419 911) the upper run runs a conveyor belt along the surface of a cooling bath in a container so that it is cooled from below. In this strand of the revolving conveyor belt there is successive in the conveying direction Make molten sulfur fed in such an amount that is behind each feed nozzle a thin layer of sulfur on the conveyor belt or on the previously formed sulfur layer forms. On top of the sulfur layers, additional cooling can be provided by blowing Compressed air can be brought about, but when several layers are applied one after the other, each of about 3 mm Thick can contribute little to cooling.

A similar cooling process takes place in a plant (v ^ 'i. Chemical Engineering Progress Volume 49, No. 5, pp. 19 and 22), with a steel conveyor belt on the side edges of an elongated cooling container slides, the water is supplied, which flows over these edges to the outside into the collecting tank. The molten sulfur is continuously fed to the surface of the from above.

It is also known to use a conveyor belt of the first-mentioned type that runs along the surface of a cooling bath into individual recessed ones, one after the other in the conveying direction To divide pockets into which the molten sulfur is introduced (cf. USA.-Patent 1 454 344).

Finally, it is also known to produce sulfur blocks with the aid of casting molds, which by means of a circulating conveyor belt one after the other under one

ίο Inflow for molten sulfur brought and filled and which are emptied on the lower run of the conveyor belt after the sulfur has solidified.

All of these methods and devices, melted To solidify sulfur has in common that the cooling due to the strong The insulating properties of sulfur are relatively slow and therefore very long cooling belts and cooling baths and, overall, very complex, large cooling systems are required for a given sulfur throughput are.

The invention is based on the object of remedying this drawback and with a given Schv.efeld throughput get by with much shorter cooling distances. The invention is based on the knowledge from that the known cooling devices have the common defect that the molten Sulfur is only moved in one direction along the cooling section, namely along the plane

of the upper run of a conveyor belt and at the same time along the surface of the cooling bath, but not across this movement device or along and relative to the surface <_js upper run of the Conveyor belt.

In pursuit of this finding, the aim of the invention becomes in the method of the type mentioned at the beginning. achieved in that the upper fium of the conveyor belt repeated with the sulfur on it at certain points distributed over its length the sulfur movement influencing deflections alternately up and down lateral tilting at these points or by longitudinal wave movement. Through this the cooling effect on the molten sulfur is locally increased.

In one embodiment of the invention, this wave movement of the upper run of the conveyor belt with repeated immersion of the sulfur carried along in the bath.

Instead, the periodic movement can be one running transversely to the conveying direction of the conveyor belt Be up and down motion in which the molten sulfur sideways to the conveying direction flows and thereby exposed relatively hot parts of the molten sulfur to an increased cooling will.

The adherence of the sulfur on the conveyor belt can be prevented by applying a thin film of Water on the surface of the conveyor belt can be prevented.

Preferred embodiments of the invention are described below, for example, with reference to the Drawings described, namely shows

F i g. 1 schematically shows the overall arrangement and construction of an embodiment of the invention, the is used to tilt a belt in the transverse direction,

F i g. 2 a and 2 b the movable in the same way

^unti f

u.-kipptc Band der Ausiühi uniform n; id f ^PP '

ρ Λ schematich a representation de ·, Verfall-V iind of the device after the Hriindiiuu. the cmc spinner 29 which consists of a mil h "- revolving ago Geschwmdi.keit Γ-conveyor belt be flour, sulfur, setting it to the Hanu crMarrt .M. over distances of e.g. H. _-. ■■

^SC p ". Tcinc sduiuhildliche DarsK-lli ™ ui" c, Λ ,, -

s ^hl "' ¹

"" Cm Zraand. the in.

»! 'F" ^Ki "« ""''fi"fc

?: _r Tv-h wooden sulfur can flow. ^tle pV 1 shows a lei.erförmiee cooling system of the SCiWcL which? as a whole with 10 I, -oichnc «and ^ is formed in this way. that they d, _: , melted. £ _hwc fel of supply or outlet lines. · .S autn.mmt from _previously known devices. I- _lst seen that the cooling steps lft mn Abzug.kanakn Z each step of the staircase is provided, st. which as war- ^ _1u , i _; isse to serve. Additional cooling of the Ge-X,!, Enes sulfur can in this Stu., BewH.t characterized who _d ^f η that cooling air inflates the erfindunL-suemäßen process in the desired Menec on the "uv.chmolzencn sulfur. The molten sulfur then flows through its intrinsic nature on the cooling staircase 10 into a receptacle ρ the sulfur pump 13 is arranged so that it pumps the molten sulfur through a line or 15 "wehrart to be delivered -cTübedaufvorrichtung 16 or 16". the übcrlaufvomchtungen 16 and 16 α s.nd so formed to a predetermined \ olume record of sulfur and a movable or antre the liquid sulfur to the surface . give off a practicable tape, which under the sound of the liver

same volume 17 will be edited

ensure that the melted S

and denoted in the opposite direction in F, g ^ b below ^^ ^ _F

Schmu after de, Lin .l ^ and

after the L me BB d., h,. - · _{χ con} .

see. In do Zc h ^ mcIU ü ^ t _{an / uhcbcn and}

sm.kuonen serve this purpose - the hand ^

ao or on the gewu sei ι, NN. ^^ ■ | _crstlind -

s.nd ^? ^ ^η * ™ ^^ J _cr sulfur cools hch e ^ vunscht tlaB - γ ^ ηη acr ^ __

and s.ch m strong em M -J ^ _{o (] cr s} , _eller

at, 'PP ⁰ "^ ⁰ f / ₍ f. ^ν ' ΐ '\; the extent of the cooling * _{5 can be} emulated" ™? ^ ^b ^. _in X _ch, for example, the Rung to c ™ * ™ ^^ ™ ^ , progressive tilting sections 26 -7 -JK dt fe _pivot , age an in their height am s | o, 1 un _k ^ ^ ^ _

the edge of the band 17 u "^, _{icn Nei} .

to take. Fi g. - a ^U "J Γ J, _{ic them as} practically guiigswm e ^ ^ mJ ^ _hmolzencl1

" _ichtunü on the tape stream to rr.cn _P

leave. ,, \ _U s execution form according to FIG. 3

35 ^^ £ «while the upper v, irdI de _e cscnm longitudinal direction wave-

a water supply source, and the water can be fed by means of a pump 19 through e.ne Lc.tung 20 Required in a water cooler 21 and put into circulation. The chilled water can then be conveyed through a further line 22 to emer humidification device 23, which is above the surface of the driven belt 17 attached In this way a film of water can very easily be applied to the surface of the belt Sen. The higher lying or raised parts 24, 25, 26, 27 and 28 of the moving belt 17 should be those provided at a distance from one another Tilt portions of the belt 17 illustrate the serve to move the molten sulfur in the transverse direction - alternately in the opposite direction - to let flow over the belt, while he otherwise in the longitudinal direction on the Volume 17 flows. The in F i g. 1 system shown sees two separate conveyors ur the inflow of molten sulfur via overflow devices 16 and 16 α. These separate conveyors allow one to apply a second layer of molten sulfur to the first layer of sulfur, overlapping it and in this way a film-like or la-

to produce mottled, leafy structure from sulfur. Of course, additional layers of sulfur can be applied if desired. F 1 g. 1 shows

* he contains. _{or lamellated}

f ^ dur E manufacturer that one means feeding devices like them

"In Fig. 3 only see ^ nmol.enem sulfur

sentence! icht ^ ^m f _h ; _{cht from} molten

application. De tr _{m dimensions gckuhl ir} _

Sch ™ ^m ™ ^a . . _{Uchc additional} and overloaded that ⁵ JJ ^ _{those on the} steep 31

50 S ^ ^d «^ ^Ι _ζ ^ Sn, record and tradem B» ^{d 1} J ^Z1 £ ^ _{32 is} set up for Wasgen can Lim. £ un, water cooler 34

ser through! em Le unt ^ ^ ₃₅

uf ° ^{r "rn" of the} _{kan welchcr} the cooling of the water 55 ruffles χ ^ em k, _{water is} then used to

^^ _{νεηαιιη} | _{By J} h are a line 36 to the what-W ^edervei ^ _{d "efuhrt.} cutters ^» ^ 31 serbadI w.eae B _{of Schweiclstücke}

zu ^ Beme ^sun S ^ _{before around the} frozen or

* ° according to F ^ fe _{efd to sulfur} | _g eb.k, en

partially ver, ^ ^ ^ _{cut up Dl} abcm * vorg _{el pieces are then} by de

| ^^; _d ^l ₂ 9 _{ervorrichtung} a Schwc elvor ^Sch'_-eu J ^ ert _chleud which usually in _im-

65 rats, btape g ^ ^ _anterior

mute ^ r ^ _{and jn der pra h}

tion ¹ ^ _{ß the sulfur} advantageous on de

nerausgesieii,

Cooling staircase 10 is abandoned to make it provisionally to the desired thickness possible. The layer cooling before it is subjected to the solidification process on the formation by lamination of the sulfur according to Volume 17. While "the sulfur of the invention is not absolutely necessary. It was determined by its own weight up the steps of the cooling staircase that a satisfactory cooling with 10 flows down and finally into the container 12 : rindet a rapid heat emission can. Ix-i which one takes a cross flow of sulfur. " If the molten sulfur in this time- herheiluii: · If it is desired, however, the lamelpunkt. In the "the molten sulfur to form the Behäl- horten Schichien, care is to be taken, ter 12 reached, still too hot, so the sulfur can the molten sulfur in a variety of for a second pass to the cooling stairs 10 and io films on the When it is carried out over this, before it is subjected to the form of FIG. 1, two separate marring treatments can be used. That one decides that from the valves 15 and when this high flow coming into the Bc- 15 "coming to the overflow reservoir 12, for example, a temperature of more than about i _S directions 16 or 16" is correspondingly set or 130 ° (. In the same way, the sulfur should be cooled as much as possible before the sulfur stream is discharged as shown in Fig. 3 is transferred to the belt 17. If, namely, a greater amount of heat is withdrawn from the given 31st, which over the length of the cwcgcn-vision world. the band 17 are distributed according to before it reaches the band 17, so "it is easier to regulate a 20 wish.

treat and freeze. Therefore, the molten sulfur on the belt 17

should remove as much heat as possible from the sulfur and overlap by a number of violations

be pulled before he aiii the tape is transferred. formed into the separate layers and let you:

The molten sulfur is usually cooled down between each application

an initial temperature of 1IS veilerbehan- der Schichun until the next and until the end of the

delt. For the purposes of the practical implementation of the tape, it follows that a large (.i <_

can according to FIG. 3 a stainless steel band rer part of the sulfur to amorphous state c

Oiler-like material can be used: it is rigid. It can also be assumed that the longitudinal

leilocii for the Ausüjiuuiigsiorrn according to Fig.! no! - direction of K: md < <s 17 occurring shrinkage of the

manoeuvrable that the band of a more flexible material 30 sulfur contributes to the crstariton sulfur \> »

lial. z. B. tough and värinel'estem rubber is. It is peeled off the surface of the tape. Will jedoJi

it is clear that the one for the tape according to FIG. 1 used a thin film of water or some other material

Material must have the property. to the extent that coolant is applied to the tape and there

to be pliable that the raised or inclined! Method of FIG. 1 applied, cross flow

adjusted sections of the tape, as they produce in 35 of the sulfur, so prevents the water

2a and 2b are shown, any appreciable adhesion of the solidified film can be formed.

New. about the transverse movement of the molten sulfur on dom volume 17. In addition, the

Sulfur · to induce on the tape. Shrinkage of the solidified sulfur here b-i.

It has been found that it is necessary to detach the solidified sulfur from the tape for the implementation,

the invention gives satisfactory results, 40 when a laminated layer of sulfur is formed

if you are to be with an average of K) up to 11 t'hour, the valves 15 and 15 are κ

a belt speed of 19.8 m sec. Processing expediently set so that they are layers of each

dead. At this speed, tests were made about 3 mm on the moving belt 17.

carried out for about Ki4 hours, and it is enough. Applying the method of FIG. 3 on, the

there was practically no loss of sulfur. 45 Sulfur cinzutau-

The working time from the beginning of the feeding of the chen. so each of the layers is

Sulfur is cooled in one of the baths 30 before the next to obtain the solid shaped surfaces

Smoldering pieces took about 1.5 minutes, the layer overlapping the previous one

Length of the tapes 17 according to the invention was un- layer is applied. That way one can

danger 30.4 m. and the width was about 91 cm. It has 50 laminated tape of solidified sulfur in one

it has been found that it is expedient to produce 3.8 minutes in thickness of about 9.5 mm. It is to-

Wasscr are used, and that with regulated pull, care must be taken that the belt 17 is always in

Supply a film of water approximately 0.4 mm thick or, appropriately, with a thin film

less moisten on the surface of the moving water or other aqueous agent

Band generated. 55 tet is. If such a film were not available, st

In Fig. 1 it can be seen that the valves 15 and could cause a temperature rise in the belt.

15 «can be adjusted in such a way that they become sulphurous if it is made of rubber or something similar

current to the overflow devices 16 or 16 a in chen material stocks and thus an adherent

thus allowing this to come between the sulfur and the gum in the desired manner

Overflow height remain filled. The excess of lead and prevent the tape from satisfying

Molten sulfur flows over the edge of the area from which sulfur is freed again.

Overflow weir 16 or 16 a and flows as the same- As the solidified sulfur during the layers

moderately thin film of molten sulfur to form very high thermal insulation properties

Has the moving belt 17 underneath it, thus preventing the first layer from solidifying

For good results, the flow should 65 tem sulfur in z. B. 3 mm thick that a great

of the molten sulfur are kept constant from the subsequent layers

the and should the speed of the belt 17 so memenge enters the belt 17 and damaging it

dimensioned to diet the formation of a film. The in this way through the first layer gc

7 8

The protection created eliminates the aforementioned difficulties in removing this heat from the cooling water.

rabilities of the heat gradient between the sulfur and also the product in the specified

and the tape. However, this problem is with the way to dry.

Execution according to FIG. 1 with cross flow of the The size of the sulfur throughput is with the ErSchulfels not to be regarded as material. In this 5 finding is determined by the width of the tape. AIl proceedings If the mass of the sulfur is said in crosswise terms, it follows that a band with a turig moves and a considerable part of this width of 122 cm will have a capacity of about Mass quickly exposed to air, 20.2 t / hour for molten sulfur at Temso that the heat of the sulfur has faster outside temperatures of 122 to 160 ° C. The need for is released and thereby practically no we- ίο water or other coolant would thereby change Heating of the belt occurs. be the one that would be necessary to normal use If the sulfur has solidified, it can prevent evaporation.

»Are subjected to cutting process, z. B. by means of In some systems, the method and the Cutting device 38, through which the size down device according to the invention in an environment measurement of these pieces of sulfur is produced. Operated in 15 that is open to the atmosphere, At this stage of the procedure, there is no shelter, e.g. not sheltered from the wind. If suitable ratios in the amorphous state. So it is practically nits available, this mode of operation can be advantageous no crystallization before, and there will be in order to facilitate the cooling of the sulfur, Cutting process no significant amounts of z. B. when a cool wind of low speed dust or fine particles. The sulfur has blown in this drowsiness. However, if the plant is in the immediate process stage still operated at a considerable temperature, rer irradiation by hot sunlight but is in a stage of solidification, there is a clearly inhibiting effect supply, so that he is responsible for the cutting and removal on the cooling process of the sulfur, and that that of the sulfur pieces, e.g. through the centrifugal process, has a lower efficiency and device 29 to a nearby supply 25 becomes more expensive. In some cases it is therefore called Stack is suitable. In Fig. 3 it can be seen that the advantageous to be seen in FIG. 1 and 3 shown Enclose clipped pieces of sulfur on an ascending device in a housing or house Hike section 39 of the band 17 upwards, Ben that the device against the elements of the äu-SvT that any excess of water drip off ßeren atmosphere protects, so that the device in can. For additional drying, a 3 ° fan is working in a controlled environment. The Ge-35 directly above the rising section housing can also be designed in such a way that it is tes of the tape 17 attached to the remaining side of the housing for the operators To remove moisture from the sulfur. the plant leaves.

As already mentioned above, the method and the device according to the Ervon the water supplied to the bath 37 constantly remedied by finding considerable economic inconsistencies Cooler 34 are pumped to divide the heat and add to the dangers of the known systems that supply the cooling water from the sulfur to sulfur treatment and provide for this a decay took. It can be seen that the cooler 34 Ren and an apparatus that is industrially general and the fan 35 serve the dual purpose of my use with advantage.

1 sheet of drawings

Claims (3)

Patent claims: 1. Procedure, molten sulfur to solidify to brinaen. by placing it in one or, preferably, several consecutive locations Continuously in one or more layers along the upper run of an endless conveyor belt is fed along a cooling bath located in a container from an aqueous Medium is essentially brought into contact with this bath, characterized in that that the upper run of the conveyor belt with the sulfur on it at certain points distributed over its length repeats the deflections influencing the sulfur movement alternately upwards and downwards issued by tilting to the side at these points or by longitudinal wave movement will. 2. The method according to claim 1, characterized in that that the wave movement of the upper run of the conveyor belt (17) under repeated Immersion of the sulfur carried along in the bath is carried out. 3. The method according to claim 1 or 2, characterized in that on the upper surface of the Upper run of the conveyor belt (17) a thin film of water applied in such a thickness becomes that he is clinging de-, melted Prevents sulfur on the conveyor belt.