PL232859B1 - System for pasteurization of half-stuff food products - Google Patents

Description

Description of the invention

The subject of the invention is a system for pasteurization of semi-mass food products.

It is known from the Polish patent specification No. 107813 A system for pasteurization or sterilization and cooling of aqueous solutions or suspensions, which consists of a set of diaphragmless heaters connected in series with the pumps placed in them through lines for liquid transfer, the outlet of the last heater being connected to the first from a set of expanders, also connected in series via lines for transferring the liquid. The heaters are also connected by serial vapor lines with the opposite direction of flow to the liquid and additionally by vapor lines with expanders, the first of the heaters is connected to the penultimate expander, and to the vacuum system, and each subsequent heater, except the last one, is connected to another expander. preceding the penultimate expander in the direction from the last to the first. The last of the heaters is additionally connected with a conduit for heating steam. The last of the expanders is connected by a vapor line to the vacuum system and to the sterilized and cooled liquid reservoir by means of a line acting on the principle of a barometric tube.

There are known processes for the pasteurization of high-density food products that use evaporators or pasteurize products in filled and closed unit packages.

It is known to use in the pasteurization process scraped-surface exchangers that prevent the boundary layer of the pasteurized product from sticking to the walls of the exchanger.

The system for pasteurization of semi-mass food products is characterized by the fact that the "steam-water" exchanger is connected through the first line of hot water circulation to the exchanger pasteurizer, which has a first exchange section and a second exchange section arranged in pairs, a third exchange section and a fourth exchange section and a section a fifth exchanger section and a sixth exchanger section, the first product circulation line with a static mixer is located between the second exchanger section and the third exchanger section, the first exchanger section and the fourth exchanger section are connected by a second line of hot water circulation, the supply line is connected to the second exchanger section product with the product pump and product tank, the third exchange section and the fifth exchange section are connected by the second product circulation line, the fifth exchange section is connected via control valves to the product receiving line and the product reheating line, replacement section The fourth heat exchanger is connected to the hot water recovery line, and the sixth heat exchanger section is connected to the product cooling water supply line and the product cooling water recovery line, and the "steam-water" exchanger is connected through the first hot water circulation line with the exchanger section the first heat exchanger pasteurizer and is connected to the steam generator through the steam circulation line and the condensate collection line.

The system according to the invention is illustrated in an exemplary embodiment in the drawing.

The steam generator (21) is connected to the "steam-water" exchanger (5) through the steam circulation line (16), having a main valve (1), a two-way return steam solenoid valve (2), a pressure regulator (3) and a safety valve (4). ), and through the condensate collection line (22) having a pump (7) with a safety valve (6). The exchanger (5) is also connected to the water supply line (17) with a pump (10) and the first hot water circulation line (23.1). The first hot water circulation line (23.1) is connected to the exchange pasteurizer (8), which has a first exchange section (8.1) and a second exchange section (8.2) arranged in pairs, a third exchange section (8.3) and a fourth exchange section (8.4) and a section a fifth exchange section (8.5) and a sixth exchange section (8.6). Between the second exchange section (8.2) and the third exchange section (8.3) there is a first product circulation line (25.1) with a static mixer (9). The first exchange section (8.1) and the fourth exchange section (8.4) are connected by the second hot water circulation line (23.2). The second exchanger section (8.2) is connected to the product feed line (18) with the product pump (11) and the product tank (12). The third exchange section (8.3) and the fifth exchange section (8.5) are connected by the product circulation line (25.2), and the fifth exchange section (8.5) is connected via control valves (13), (14) and (15) to the receiving line ( 26) / product and the product reheating line (19). The fourth exchanger section (8.4) is connected

PL 232 859 B1 with a hot water recovery line (24). The sixth exchanger section (8.6) is connected to the product cooling water supply line (20) and to the product cooling water recovery line (27).

The application of the system according to the invention is as follows. The pasteurization process begins with the supply of steam at a temperature of about 160 ° C, generated in the steam generator (21), through the main valve (1) to the steam circulation line (16). The two-way return steam solenoid valve (2) passes the steam through the steam pressure regulator (3) to the safety valve (4) to identify its pressure. The increased steam pressure opens the safety valve (4), while the solenoid valve (2) closes the return path. In the "steam-water" exchanger (5), the water supplied to the supply line (17) is heated by the pump (10). After the heat exchange in the "steam-water" exchanger (5), the obtained condensate is directed to the receiving line (22) and forced through the pump (7) with a safety valve (6) back to the steam generator (21). The water heated in the "steam-water" exchanger (5) to the temperature of 94 ° C flows through the first circulation line (23.1) to the first exchange section (8.1) and then through the second circulation line (23.2) to the fourth exchange section (8.4) of the exchange pasteurizer (8). At the same time, the food product collected in the tank (12) is fed through the pump (11) and the supply line (18) to the second exchange section (8.2) of the exchange pasteurizer (8), where the product is pre-pasteurized. In order to ensure a uniform product temperature, the product is smoothly transferred to the third exchange section (8.3) through the first circulation line (25.1) and a static mixer (9), where the product is mixed and heated to a constant pasteurization temperature. In the third exchange section (8.3), the pasteurization process continues, followed by a smooth movement of the product to the fifth exchange section (8.5) through the second circulation line (25.2). In the fifth exchange section (8.5), the product is gradually cooled down to 62-66 ° C by supplying the sixth exchange section (8.6) with cool water through the supply line (20). The cooled product smoothly moves from the fifth exchange section (8.5) through the receiving line (26) to further production stages, e.g. filling and packing. During the product cooling process, heated water is obtained in the sixth exchange section (8.6), which is directed through the recovery line (27) for use in other production stages or in plant washers. The water from the first (8.1) and fourth (8.4) exchanger sections, having a temperature of around 86 ° C, is directed through a recovery line (24), pump (10) and supply line (17) for reuse in the "steam-water" exchanger (5). At the outlet of the fifth exchange section (8.5) there are control valves (13), (14) and (15) which control the product flow. The valve (13) closes or opens the flow of pasteurized product completely, the valve (14) closes or opens the flow of pasteurized product to the receiving line (26), and valve (15) closes or opens the flow of pasteurized product to the reheat line (19). The reheating line (19) is used when the pasteurization temperature is too low and the product leaving the fifth exchange section (8.5) must be pasteurized again. Such a situation may arise, for example, when the production process is resumed after a technological break.

The main advantage of the system according to the invention is the possibility of carrying out the pasteurization process in a continuous manner. This makes it possible to supply the bottling devices with the product without interruptions or the multiplication of devices treating the heat product. Another advantage, especially for homogeneous products, is the possibility of using heat exchangers with the size of the aperture favorably affecting the homogeneity of the temperature of the product in the mass. It is possible to use an internal surface of the exchangers, which causes additional mixing of the product during the flow, which affects the temperature equalization in the mass. The use of an appropriate size of exchangers enables the use of a heating medium with a temperature practically equal to the temperature required for the heat treatment process, and thus prevents the product from overheating. Moreover, the exchangers can be used for both heating and cooling the product. Another advantage of the system is the possibility of energy recovery at individual stages of the pasteurization process thanks to the reuse of the heating medium. Another advantage is the ability to connect the entire system to the washing unit without having to disassemble it.

PL 232 859 B1

Drawing Item List:

1. Main valve

2. Two-way return steam solenoid valve

3. Steam pressure regulator

4. Safety valve

5. Steam-water exchanger

6. Safety valve

7. Pump (condensate)

8. Exchange pasteurizer

8.1. First exchanger section

8.2. Second exchanger section

8.3. Third exchanger section

8.4. Fourth exchanger section

8.5. Fifth exchanger section

8.6. Sixth exchanger section

9. Static mixer

10. Pump (feedwater)

11. Pump (product)

12. Tank (product)

13. Control valve

14. Control valve

15. Control valve

16. Circulation line (steam)

17. Supply line (water)

18. Power line (product)

19. (product) heating line

20. Power line (water cooling the product)

21. Steam generator

22. Collection line (condensate)

23.1. Circulation line (hot water)

23.2. Circulation line (hot water)

24. Recovery line (hot water)

25.1. Circulation (product) line

25.2 Circulation (product) line

26. Pickup (product) line

27. Recovery line (water cooling the product)

Claims (2)

Patent claims 1. System for pasteurization of semi-mass food products, having heating devices connected by lines for liquid transmission and pumps, characterized in that the "steam-water" exchanger (5) is connected through the first hot water circulation line (23.1) with the exchange pasteurizer (8) which has a first exchange section (8.1) and a second exchange section (8.2), a third exchange section (8.3) and a fourth exchange section (8.4) arranged in pairs, as well as a fifth exchange section (8.5) and a sixth exchange section (8.6), with the second exchanger section (8.2) and the third exchange section (8.3) there is the first product circulation line (25.1) with a static mixer (9), the first exchange section (8.1) and the fourth exchange section (8.4) are connected by the second circulation line (23.2) hot water, the second exchanger section (8.2) is connected to the product feed line (18) with the product pump (11) and the product tank (12), the third exchange section (8 .3) and the fifth exchange section (8.5) are connected by the second product circulation line (25.2), the fifth exchange section (8.5) is connected via control valves (13), (14) and (15) to the product receiving line (26) and the product heating line (19), the fourth heat exchanger section (8.4) is connected to the hot water recovery line (24), and the heat exchanger section PL 232 859 Β1 sixth (8.6) is connected to the product cooling water supply line (20) and to the product cooling water recovery line (27). 2. Semi-bulk food pasteurization system according to claim 1 5. The heat exchanger according to claim 1, characterized in that the "steam-water" exchanger (5) is connected via the first hot water circulation line (23.1) with the first exchanger section (8.1) of the exchanger pasteurizer (8) and is connected to a steam generator (21) via a circulation line (16) steam and a condensate collection line (22).