US1898542A - Manufacture of sulphite acid liquor - Google Patents

Description

Feb, 21, 1933.

J. D. JENSSEN MANUFACTURE OF SULPHITE ACID LIQUOR Filed July-'7, 1950 VAI/:ufr MIMOFW WANA A En f Bmw QOQ,

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Patented Feb. 21, 1933 UNITED STATES PATENT OFFICE JACOB BARRE JENssEN, or lNEW YORK, N. Y., AssreNoR To e. D. .TENssEN COMPANY,

` or NEW Yonx, N. Y. A j

MANUFACTURE OF SULPHITE ACID LIQUOR Application filed July 7, 1930. YSerial No. 466,175.

The invention relates to the manufacture of sulphite acid liquor, as described in the present specification and illustrated in the accompanying drawing that forms part of the same.

The invention consists essentially in the means employed for strengthening the free acid liquor resulting from combining-the elements in association with the aforesaid means as pointed out in the claim for novelty following a description in detail of the preferred form of the invention. Y

The objects of the invention are to produce an acid liquor that will not materially vary in regard to the proportions of its contents particularly in respect to lime quantities which are apt tov change considerable under different Weather conditions as for example, in the hot weather, the disintegration of the lime is greatly increased `while in the cold weather the lime resists the attack of the gases so that the maximum quantity of lime absorbed in the water with the gases on warm days is much in excess of the requirement,

while on cooler days, the maximum quantityk absorbed is approximately correct, therefore to regulate these quantities insures an even cooking liquor and better pulp; to maintain the continuity of the process in the production of acid liquor, that is to say, to introduce in the known methods of making acid liquor an auxiliary means whereby the direction of the flow is so adjusted as to divert the gas in order to obtain two distinct operations under 35 different conditions; to utilize existing systems to the greatest extent possible and at the same time adjust the diierences in regard to the contents without materially adding to the cost of production; and generally to provide for cooking purposes in pulp processes an acid liquor of superior quality notwithstanding the natural fluctuations due to temperature conditions.

The drawing is a diagrammatic view showing the essential elements contributory to the carrying out of this invention.

Referring to the drawing, the numeral 15 indicates the tower or tank forming the receptacle in which the ingredients are combined to produce an acid liquor.

Usually these ingredients are lime and S02 gas emanating from the sulphur burner indi cated by the numeral 16. This gas usually goes through various devices such as coolers and Hows along within the gas inlet feed pipe 17 to the tower or tank 15 herein shown as .the absorption receptacle and the valve 18 is introduced in the gas inlet pipe line to- Wards the receptacle end. j

The auxiliary receptacle 19 contains inert material 20, such as blocks of hardwood or other material adapted to `resist the attack of the gases, this inert material being supported on the grate 21 and arranged ina pile of broken or separated pieces which will per- ,l mit the trickle of the acid liquor' there through and through'the grate therebelow.

The as inlet pipe line 22 taps the pipe line 17 efore it reaches the valve 18 andthis pipe line 22 extends to the inlet 23 near to the lower end of the auxiliary receptacle 19.

The pressure blower 24 is introduced in the pipe line 22 before it reaches the auxiliary receptacle 19,thus forcing'in the gas at a considerable pressure below the grate 21.

Above the inert material the return pipe line 25 extends from the gas outlet 26 and leads tothe pipe line 17 and. communicates therewith between the valve 18 and the inlet to the receptacle 15. -V

The valve 27 is introduced in the pipe line 25` adjacent to the auxiliary receptacle and this is a Very important valve, as by means of this valve the pressure is very nely regulated within the auxiliary receptacle.

Therefore the absorption of gas is carefully adjusted to the needs of the occasion.

The pipe line 28 leads into the receptacle 15 from a suitable water supply and thepipe line 29 leads from the bottom of the receptacle 15 to the free acid liquor inlet` 30 at the top of the receptacle 19, consequently the water which has enteredthe receptacle 15 after it has become charged with lime and SO2 to the extent required flows through to Vthe pipe line 29 in the formv of free acid liquor into the auxiliary reservoir 19 and from there trickles down through the inert material meeting. the rising gases which are forced into the auxiliary receptacle below Vthe grate and held back therein at the desired pressure and picks up the quantity of S012 according to the strength required-and falls down below the grate Where it passes out.

The looped pipe line 31 extends from the outlet 32 of the auxiliary reservoir downwardly and upwardly to the storage tank 33 and thus at all times a water seal is provided in the trap- 34 at the bottom of this outlet pipe line, the upwardly extending leg 85 to the storage tank being also filled with acid liquor to complete the seal, thereby preventing the loss of gas from the auxiliary tank through the outlet 32. v

The valve 36 is provided inthe pipe line 31 if required. The pump 37 and a valve 38 are also introduced in the pipe line 29 one on either side of the pipe line 39, which forms the `direct passage from the tank 15 to the storage tank 33, when it is desired to cut out the auxiliary tank or tower 19.

The valve 40 is also introduced in the pipe line 89 so as to effectively cut out the storage s tank when the delivery is entirely to the auxiliary receptacle 19. The valve 4"? is introduced in the pipe line 22 for obvious purposes.

The operation of this invention has been fairly well described in explaining the uses of the several elements, but .brieliy it may be stated that the SO2 vgas is prepared in the most acceptable manner and flows through a main pipe line to the tank, tower or receptacle 15 where lime is being treated in the preferred manner. f

The acid liquor produced in this receptacle 15 falls to the bottom and in carrying out this invention is transferred by an outlet pipe line to the top of an auxiliary tank, tower or receptacle where it trickles through inert Inaterial and meets a gas, which also comes from the main pipe line, but through a branch supply of SO2 gas, a primary receptacle towards its lower end connected to said gas pipe and at its upper end to a water supply and containing a lime element, an auxiliary receptacle connected at the upper end to the lower end of the aforesaid receptacle and containing acid resisting inert material in irregular pieces, a supplementary feed pipe tapping the main gas feed pipe and communicating with the lower portion of said auxiliary receptacle below said inert material Vand a pressureblower introduced therein, a

passage' which taps the main pipe line,'a

pressure blower being introduced to give greater force to the Vdelivery'of gas into the auxiliary receptacle below the grate. f f

lMeanwhile the valve 27 has been carefull; adjusted so as to obtain within the receptacle 19 the desired pressure for it is advisable to have a considerable pressure within this auxiliary receptacle in order that a considerable quantity of SO2 gas may be absorbed, but at the same time, it is necessary to have an outlet for the gas as the nitrogen is not useful and must find an outlet, but this nitrogen carries away with it a considerable quantity of oxygen and sulphur gas and this is again useful and is returned to the receptacle 15 to reinforce the gas already passing thereinto from the main line of piping, the nitrogen finally passing off at the upper end of the main receptacle.

What I claim is j f In the manufacture of acid liquor, a main line gas feed pipe leading from a source of

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