US2611362A - Submersible burner - Google Patents

Description

-23 v N. SWINDIN' v 2,611,362

SUBMERSIBLE BURNER Filed March 31, 194'? I nventor A ttorneys- WM By Patented Sept. 23, 1952 2311,3621 'SIJBMERSIBLE BURNER;

Norman 1 Swindin, London, England Application -Marcli 31, 1947, SerialNm 738,361

In GreatiBritain April 3, 1946.

' 6 claims. (01. 126 -360) This, invention. relates to. improvements in submersibleburners: and has-more particular reference to the type thatare. suppliedw-itht an inflammatory gaseous mixture; and. thateuponignition thereof the resultant hotgases issue below the surface ofthe-liquid.

Thepresent invention finds. particular appli cationuin the heating and agitation of-theacid? baths employed for the pickling of iron and. steel and in other applications of a like nature.

The object of the present invention. is to-pre:

vent incrustation and obstruction of the orifices from which the heating and agitatinggasesenter the bath, and to prevent the lowering ;of the level of thebath which wouldotherwise take-placedue to evaporation of the liquid- It has been ascertained that if a-. suitable amount of water is. supplied-by anlinlet to the combustion chamber, so, that it .admixes with the inflamed gases orinthe fiamezpath-ofzthe gas; that the generation of steam in.the chamber ensues and theissue of .such steam at themouth of theburner orifice .orlorifi'ces issuificientinitsaction to prevent concentration ,at said orifices of crystalline or other. matter, which. otherwise. forms and inthe caseoflsteellpicklingl baths:

mainly consists of ferrou sulph'ate, eitheranhydrous or'containing onl'y a smalllproportion oft water'of crystallisatiomand'it also compensates.-

for evaporation of water from the bath;

According to a preferred form .ofltheinvene tion a burner of the type generallyconforming to that set forth above is mounted in themainr pickling tank or alternatively accessibly mounted" in an independent tankso as to provide better access for the burner head and valves, whilst its combustion chamber is led into the interior of the tank. In either type an extension of the said combustion chamber is arrangedltoissue. fromits tank housing and enter in a horizontal direc' tion in or about the floor level of the acid pickling bath, there being circulation of said liquor between the main pickling tank: and thezindependent tank.

In order to keep clean the exit orifices ;o f-f the gases means are provided for'the generation of steam within the combustionrchamberf of? the burner and conveniently this is-accomplishediby introducing through a suitably disposedgconduit a small stream of water whic-lris vapourised by the'inflammation of the gases within; th= chamber; 7

The invention is not necessarily restricted.itothe casein which the combustion chamber" is: housed in a separate ,tankvcommunicating with the pickling tank by two ports as already described. The burner may equally well be placed at one end or corner 'of-the bath with a per- Thezinvention consists combustion chamber in advance of gas or flame issue orifices thereof.

The invention further comprisesplacing said.

burner. in an independent but communicating tank adjacent said :main pickling tank whereby an extension of. thecombustion chamber enters.

andextends into saidpickling tank with conduits between .said independent tank and pick:

lingtankfor thermosyphon or forced'flow of liquid from one tank to the other.

In order'that the invention shall be more fully, understood reference is made to the accompany- 1 ing drawings wherein:

Fig. 1 represents in' part sectional; elevation,

the burnermounted in an acid picklingitank, j

Figs 2 isa part sectional elevation showing the" burner mounted in an independent adjacent tank but communicating therewith for fiuidfcire culation, I

Fig; 3 is a plan view'of Figure 2.

Referring to the drawings and" to Fig:- 1 the;

' iron picklingtankl is of normal construction;

tom of the bath or otherwise, as desired.

and above. the level of? the pickling liquonzj s a supporting structure l'carrying the 'h'ead plate of "the submersed' burner combustion chamber? '5? The: burner, combustion chamber 5 is' supplied witha combustible mixture through pipeorpipes 6 andelectrical ignition of the mixture iseffected by sparking plug 1'; fIhe *gases-fromth'e burner combustion chambers pass to anextensionof chambergfi" comprising a tubeS-Which'is supportedlupon" the basetof thepickling'tank l,- and-a pipe i 0 *running centrally "along the -bottom of the tank; said pipe l Obeing perforated an H permitting the hot'g'ases of combustion and" steam fromthe added waterto enter the-body" ofliquor; Water is introduced through conduit 12' and i converted into steam and 'passes'away" with the gaseous products-of combustion' to'the liquid treatedj In operation the supply of water to the-burner has a threefold effect, since its ad mission to the'combustion chamber B inhibits or: prevents-the growth "of crystals (in this=case fer roussulphate) around the issue orifices HZby'v saturation of the products of 'combustion' with water vapor and-equally can be adjustedinf. a;- manner-to'equal substantially the rate of evapo l by compensating for the losses due" toievapo ration. The forceful issue of "thehot gases" pro vides excellent agitation of the liquid.

The materials employed for construction of the in a submersible :burnerl more particularly for use in iron picklingtanks wherein-access to-said burner isprovidedab0vethe liquor levellof said tank and the combustion; chamber extends into and 1 is submerged. within the body of the liquor heated and. wherein an independent supply of Water is admitted toisaid.

3 said burner and its components are acid resisting and for those parts not subjected to intense heat, such as the water feed pipe, may be of metal coated with. ebonite or like hard vulcanised rubber compound.

In Figs. 2 and 3 an alternative method is shown for mounting the submersible burner. In this form an independent tank I4 is provided immediately adjacent the main iron pickling tank I said tank 14 being provided with communicating passages l5 and 16 respectively in the form of conduits between the two tanks, the liquid level 2' in both remaining thereby the same. The burner combustion chamber 5 is in like manner to the form shown in Fig. 1 provided with a tube 8', which latter passes through the conduit 16 into the tank I, and is supported on the base 9' of the tank 1'. Water is admitted to the hot gases by pipe [2. In this form of the invention the hot liquor in operation circulates between the two tanks as indicated by the arrows.

I claim:

1. The method of heating pickle liquors, which comprises burning a combustible mixture, mixing water with the combusted gases to generate a water vapor content in said gases, and discharging the combusted gases and their water vapor content into a body of the liquors below the upper surface thereof, and passing the gases and vapors through the liquors to compensate for the water evaporated from said liquors and prevent incrustation in the zone of discharge of the combusted gases.

2. The method of heating and agitating an acid bath of pickle liquor containing crystallizable matter and for maintaining the level of liquor in the bath, comprising burning a combustible gaseous mixture to form a stream of combusted gases, mixing water with the stream of combusted gases, heating the water thereby and generating steam, and passing the combusted gases admixed with steam through the bath of liquor below the upper surface thereof in the form of numerous small streams to heat and agitate said liquor, said water being introduced to the stream of combusted gases at a rate substantially equal to the rate of evaporation of water from the heated bath to compensate for such evaporation and to prevent concentration of crystalline matter in the zones of said small streams.

3. A submersible burner for heating iron and steel pickling liquors, comprising in combination, a combustion chamber arranged to depend into a body of pickling liquor, means on the upper end of said combustion chamber for supplying a mixture of combustible gases thereto, means extending within said combustion chamber for igniting said combustible gases, an extension tube connected to the lower end of said combustion chamber to receive combusted gases therefrom and arranged to extend in the lower portion of said body of liquor, said extension tube being formed with a plurality of outlet orifices, and a conduit connected with said extension tube in advance of said outlet orifices for delivering a supply of water to said tube for heating by the combusted gases and generating steam for discharge with said gases through said orifices.

4. A submersible burner according to claim 3, including main and auxiliary tanks intercommunicating for circulation of said body of pickling combustible gaseous mixture to the burner for ignition to produce combusted gases, means for supporting the burner in a submerged position relatively to the level of liquor in the tank, an extension of the burner combustion chamber connected thereto and disposed in the tank below the level of liquor therein and having orifices for discharging combusted gases from the burner combustion chamber and the extension of said combustion chamber, and means connected to said extension of the combustion chamber and closely adjacent thereto in heat exchanging relation and in advance of said orifices for introducing water to the combusted gases from the combustion chamber and thereby generate steam for admixture with the combusted gases and discharge with the combusted gases from said orifices.

6. Apparatus for heating and agitating iron and steel pickle liquors, comprising a tank to contain a bath of pickle liquor, a burner having a combustion chamber, means for supplying a combustible gaseous mixture to the burner for ignition to produce hot combusted gases, means for supporting the burner in a submerged position relatively to the level of liquor in the bath, an extension connected to the combustion chamber of the burner to receive combusted gases therefrom and disposed in the lower portion of the tank below the level of liquor therein and having orifices distributed along its length for discharge of the combusted gases into the bath of liquor, and means connected to the combustion chamber extension closely adjacent to the burner and in advance of the orifices for introducing water to the combusted gases to generate steam for admixture with the combusted gases and for discharge of the steam and combusted gases through said orifices.

NORMAN SWINDIN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 160,178 Gething et al Feb. 23, 1875 414,800 Edminster Nov. 12, 1889 517,297 Reiss Mar. 27, 1894 959,195 Au Werter May 24, 1910 1,013,635 Bardill' Jan. 2, 1912 1,019,965 Kelly Mar. 12, 1912 1,667,122 Kilgus et al Apr. 24, 1928 1 1,973,456 Wilson Sept. 11, 1934 2,055,211 Yoder Sept. 22, 1936 2,204,051 Ritts et a1 June 11, 1940 2,358,302 Brosius Sept. 19, 1944 2,375,840 Ekstrom May 15, 1945 FOREIGN PATENTS Number Country Date Great Britain NOV. 22, 1928

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