DE969902C - Device for separating sugar juice - Google Patents

Description

Device for separating sugar juice For the pre-separation of sugar juice it is important that the addition of the divorcee, such as milk of lime or parting juice, takes place in such a way that the alkalization of the raw juice is gradual and slow as possible increases continuously up to the desired final value. It is furthermore desirable that high, local alkalinity is avoided in the individual process stages.

In most known procedures, the divorcee is used added to individual chambers in the appropriate dosage and by means of an agitator mixed with the juice flowing through. Although this is the desired increasing Reached alkalinity, however, it is inevitable that in the individual chambers Local divisions take place at the point of entry of the divorce proceedings.

Another method is to remove all of the divorcee on the Introduced at the end of the trough, and the alkalized juice is countercurrent by means of Agitator and adjustable flaps passed through the trough, so that the individual Part of the circulating alkaline juice flows into the chambers. Even if by means of the adjustability of these flaps a certain controllable amount of alkalized Juice can be fed to the individual chambers, so it is a precise control the actual circulating or diverted quantities are not possible.

A device for separating sugar juices is also known, where circular disks sit in a trough on a rotating shaft that alternately have through openings offset by 18o ° and the trough in mixing and subdivide stabilization chambers. The diameter of the disks is smaller than the diameter of the trough, so that a semicircular passage gap for the juice between the edges of the slices and the wall of the trough is. Each mixing chamber is assigned a scoop tube that rotates with the shaft serves to feed the juice into the adjacent mixing chamber against the flow of juice to convey by means of hydrostatic pressure. As a result of the fact that the circumferential discs provided their position in the trough continuously change, there is also a constant change in the flow of juice. The job, the juice with progressively increasing alkalinity through the trough is used in this device not solved satisfactorily. The scoop tubes can also do their intended purpose meet only to a small extent, since only a small amount by means of hydrostatic pressure Amount of juice returned and not changed according to the circumstances can be. The replacement of the scoop tubes by pumps leads to this device not a success, because it results in the changing positions of the juice Passage openings of the discs alternately in one or in the opposite one Direction would be guided.

With the invention, the shortcomings mentioned are overcome by one of the last Fixed the circulating pump sucking out the stabilization chamber, the pressure line of which with the preceding mixing chambers by branch lines with decreasing flow cross-section is connected, the fixed walls forming the chambers alternately Leave free passage openings at the top and bottom for the continuous flow of juice.

It is advantageous to use the feed lines to the individual mixing chambers Built-in control devices for the flow rate.

With such a device it is possible to use any mixing chamber to supply the precisely determinable proportion of divorce agents and at the same time a to achieve good mixing in each chamber. The operations manager has it now in hand, by setting the control device accordingly, the desired Adapt the pH curve to the respective operating conditions.

In order to achieve high, local alkalinity in this facility as well to avoid can, according to a further embodiment of the invention, in each case a stabilization chamber with the mixing chamber preceding the adjacent mixing chamber via a be connected to a special circulation line with an associated circulation pump. With this It is possible to set up the individual mixing chambers by decreasing the separating agent Concentration to be supplied in a precisely determinable amount.

The invention is shown in the drawing in two exemplary embodiments.

Fig. I shows a pre-separating trough in a vertical cross-section, Fig. 2 shows a section in the direction 2-2 of FIG. 1, FIG. 3 shows the trough in horizontal cross-section; Figs. 4 and 5 show another embodiment of a pre-separating trough in the vertical and horizontal cross-section.

In the embodiment according to Fig. I to 3, the trough i is through vertical sheets 2 and 3 divided into compartments I to VI. Sheets 2 and 3 alternately leave passage openings 4 and 5 free at the top and bottom, their cross-sections increase according to the amount of juice flowing through towards the end of the trough and through Adjusting organs?, A and 3 a are adjustable. Each division I to VI is carried out by means of the Sheets 2 and 3 are divided into mixing chambers 6 and stabilizing chambers 7. In the mixing chambers 6 can rotate stirrers 8. The raw juice is in the trough i introduced through port g and through the overflow io of the drain line ii fed. A baffle plate 12 is connected upstream of the overflow io. The means of separation, for example, separating juice or milk of lime, the last mixing chamber 6 is through the nozzle 13 in the lower part of the trough i supplied in an amount that by a pH meter or a raw juice quantity meter is determined.

According to the invention is on the lower part of the last stabilization chamber the circulation pump 14 is connected to which a pressure line 15 is connected, the extends with decreasing cross-section over the length of the trough i and branch lines 17 for the individual mixing chambers. In the branch lines 17 are Control devices 18, for example adjustable valves or cocks, for the control the flow rate installed. In or immediately behind the respective passage opening 5 from the stabilization chamber 7 to the next following mixing chamber 6 are the Branch lines 17 introduced into the trough i.

By means of the circulating pump 14, the last stabilization chamber becomes 7 of the previous juice having a certain pH value in the corresponding Amount withdrawn and fed to the individual mixing chambers 6 in an adjustable amount. As an example it is assumed that 130 kg of juice are diffused from 100 kg of beets is deducted, which is a processing amount when 100 kg of juice is fed into the trough of 77 kg of beets. If, for example, the previous juice is now to be 0.2540 /, Ca 0 a. As a rule, raw juice must be included in the preliminary decision on 100 kg about zoo g Ca0 are supplied. This amount is equivalent to 20 kg of excretory juice per 100 kg of raw juice added, provided that in the main separation about 1.3% Ca0 is used on beet. Then juice circulations and concentrations result in the individual chambers of the pre-separation trough according to the following table I.

An approximately linear one results from Table I below Increase in the CaO content in the individual chambers. As mentioned earlier, this Curve according to the respective conditions by operating the control device 18 can be changed.

In the exemplary embodiment according to FIGS. 4 and 5, the internal structure of the trough i corresponds to the internal structure in the exemplary embodiments i to 3. Corresponding reference numbers apply accordingly. In this exemplary embodiment, the circulation pump 14a is connected to the last stabilization chamber 7 f , and the pressure line 15a with the one preceding the adjoining mixing chamber 6 f Table I. Abbey juice amount CaO CaO Type of juice lung kg g °% aR Raw juice ioo I circulating juice + 20 40 Mixed juice 120 40 0.043 II circulating juice -E- 30 6o Mixed juice 150 ioo o, o86 III circulating juice -f- 45 go Mixed juice 195 igo o, 126 IV circulating juice - + - go 18o Mixed juice 285 370 o, 169 V circulating juice +235 470 Mixed juice 520 840 0.210 VI sheath juice 200I + 20 pre-prepared juice 540 1040 11 ! 0.252 Circulating juice - 420 circulation to the main divorce Table II Abbey type of juice Amount of juice Ca0 Ca0 Young kg g % aR Raw juice ioo I circulating juice -f- ioo 66 Mixed juice 200 66 0.043 Circulating juice +220 213 II mixed juice 420 279 o, o86 Circulating juice - ioo 66 Mixing juice 320213 Circulating juice + 28o 364 III mixed juice 6oo 577 0, i25 Circulating juice -220 213 Mixed juice 38o 364 Circulating juice +400 647 IV mixed juice 78o ioii o, 169 Circulating juice -280 364 Mixed juice 500 647 Circulating juice +500 977 V mixed juice iooo 1624 0.210 Circulating juice -400 647 Mixed juice 6oo 977 Vaginal juice '-, 25 250 VI mixed juice 625 1227 0.254 Circulation juice -500 circulation deduction i25 to the main divorce Mixing chamber 6 e connected. A circulation pump 14b is also connected to the preceding stabilization chamber 7e and the pressure line 15b is connected to the mixing chamber 6d. A corresponding circuit is provided for circulation pumps 14e, 14d and 14e and for the associated pressure lines 15c, i5d and 15e. From this circuit it follows that circulating juice of low alkalinity is always introduced into the corresponding mixing chambers.

Under the same condition as in the embodiment according to Fig. 3 and 4 show the juice circulation and concentrations according to Table II.

Table II also shows the linear increase in the CaO content visible in the individual chambers.

Claims (6)

PATENT CLAIMS: i. Device for separating sugar juice, in the the raw juice runs through a trough divided into mixing and stabilization chambers, with the separating juice or milk of lime from the last mixing chamber and the previous one Juice the subsequent mixing chambers from the last stabilization chamber continuously is admixed, characterized by one from the last stabilization chamber suction circulating pump, its pressure line with the preceding mixing chambers is connected by branch lines with decreasing flow area, wherein the fixed walls that form the chambers alternate with openings above and below release for continuous flow of juice. 2. Device according to claim i, characterized characterized in that in each case a stabilization chamber with that of the adjacent Mixing chamber preceding mixing chamber by a special circulation line is connected to the assigned circulation pump. 3. Device according to claim i or 2, characterized in that in the supply lines to the individual mixing chambers Control devices for the flow rate are installed. 4. Device according to claim 1, 2 or 3, characterized in that the connection of the supply lines to the individual mixing chambers in or immediately behind the respective passage opening is provided between the stabilization chamber and the mixing chamber. 5. Establishment according to one of claims i to 4, characterized in that the passage openings between the built-in chambers in the direction of the sap flow increasing cross-section own. 6. Device according to claim 5, characterized in that the passage cross-sections can be regulated for the individual chambers. German publications considered U.S. Patent No. 893,473; Magazine "Zucker"., 1953, p. 272; 1952, p. 383 to 385.