JPH09248156A - Production of boiled egg by retort sterilizer - Google Patents

Abstract

PROBLEM TO BE SOLVED: To realize a process for producing boiled eggs at a high yield rate by making approximately 1% egg breaking ratio. SOLUTION: This method for producing boiled eggs by a retort sterilizer is given by gently placing many raw eggs 2 for fixing them on a heat resistant plastic pallet 1 mediated with half egg shell type recessed parts of supporting poles, providing a container 5 housing piled plural pallets 1, loading piled plural containers into the retort sterilizer, applying a pressure of approximately 3KG with a pressurizing valve 7, performing a pressurized heating process at 90 deg.C for 7min by an indirect heating method using a heat exchanger 11 under a hot water spray 8 or in a hot water, then lowering the pressure instantly, performing a cooling process by a cooling water from a cooling valve 15 and taking out the boiled eggs from the retort sterilizer.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a method for producing boiled eggs using a retort sterilizer.

[0002]

2. Description of the Related Art Conventionally, an open type boiling tank is used mainly under atmospheric pressure.

[0003]

When boiling in an open state under atmospheric pressure as in the conventional example, there is a difficulty in adjusting the hot water temperature, and it often becomes non-uniform, which is stable in the processing of boiled eggs. It was easy to cause variations in quality. Furthermore, an egg breaking rate of 10% or more was observed in which the shell cracked as the water inside the egg expanded.

The object of the present invention is to keep the egg-breaking rate to 1.2% or less and to produce boiled eggs in a short time by rapid heating and rapid cooling.
An object of the present invention is to provide a method for producing a boiled egg using a retort sterilizer capable of obtaining a processed egg having a soft yolk.

[0005]

In order to achieve the above object, a large number of raw eggs are statically fixed on a pallet made of heat-resistant plastic through a semi-egg type recess of a supporting column, and a plurality of the pallets are attached. Providing stacked containers, multiple containers are stacked and loaded into a retort sterilizer, pressurized to about 3KG with a pressure valve, and an indirect heating method using a heat exchanger at a temperature of around 90 ° C. Perform pressure heating process in hot water spray or hot water for 7 minutes, then immediately perform pressure reduction and rapid cooling process with cooling water from the cooling valve, and remove boiled egg with retort sterilizer taken out from retort sterilizer. The manufacturing method was used.

(Operation) In the present invention, a large number of raw eggs are arranged and fixed on a heat-resistant plastic pallet in an orderly manner. Therefore, hot water from above and both sides like a hot water spray type retort sterilizer is used. The raw egg does not move or jump out even after receiving the spray. Also, when the hot water type was used as the retort sterilizer, the raw egg did not float or rotate in the hot water.

Since a plurality of pallets in which raw eggs are orderly fixed are stacked in a container and loaded in a retort sterilizer, they are easy to handle and do not damage the raw eggs. In the retort sterilizer, by performing rapid pressure heating at about 3KG and 90 ° C for about 7 minutes as the pressure heating step, the internal pressure rise due to the liquid expansion in the egg can be suppressed by the external pressure, and the egg breakage You can boil it without raising it.

Immediately after the rapid pressurizing and heating step, the pressure is immediately lowered and rapid cooling with cooling water is carried out to preferentially solidify (protein denature) only the egg white in the egg, and boil the egg yolk in a nearly semi-boiled state. I can give you. Therefore, the boiled egg has a high whiteness (egg white) and a soft yolk (egg yolk), which makes it possible to obtain high-value products.

[0009]

BEST MODE FOR CARRYING OUT THE INVENTION The pallet used in the present invention is made of heat-resistant plastic, has a supporting column in the center, and has an egg standing portion provided with semi-egg type concave portions from both sides so as to lean on the supporting column. Many are formed neatly. The raw egg is stably fixed by loading it in the half egg-shaped recess. The central support pillar serves as a support portion when stacking the pallets in multiple stages, and can be stacked so as not to contact the eggs. A plurality of pallets are stacked, loaded into a container, and loaded into a retort sterilizer.

In the retort sterilizer, the air pressure is adjusted via the pressurizing valve, and the hot water indirectly heated via the heat exchanger is circulated and supplied into the retort sterilizer so that it is always under constant pressure. Provide a constant temperature hot water spray or hot water condition. Rapid processing can be realized by performing the pressure heating process on the container containing the raw egg loaded in the retort sterilizer. After processing, the pressure is reduced and cooling water is supplied to perform rapid cooling, so that the white egg is firm and the yolk is a semi-boiled boiled egg.

Since the hot water is circulated by an indirect heating system using a retort sterilizer, it is possible to easily obtain hygienic processed eggs which are hygienic and have high commercial value, because the pressurization and heating can be easily adjusted.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The embodiments shown in the drawings will be described below. FIG.
In the above, 1 is a pallet, which allows a large number of raw eggs 2 to be placed in order. Reference numeral 3 denotes a central support pillar, which serves as a support portion when the pallets 1 are stacked. Reference numeral 4 denotes a half egg type concave portion, in which raw eggs are stored. For example, 5 pieces of raw egg 2 are placed on the pallet 1 in an order of 30 pieces in 6 rows.

In FIG. 2, numeral 5 is a container for stacking, for example, eight pallets 1 each (egg 30 × 8 = 2).
40). The size of the container is, for example, 350 mm (depth)
It is loaded into a retort sterilizer with a size of 650 mm (width) x 300 mm (height). In FIG. 3, reference numeral 6 denotes a retort sterilizer, in which the eggs 2 placed on the pallet 1 are placed in a container 5 and loaded. Reference numeral 7 is a pressurizing valve, which adjusts the pressure inside the retort. 8 indicates a spray.

Water from the supply pump 9 is indirectly heated by the circulation pump 10 via the heat exchanger 11, and sprayed from the spray 8 in the retort sterilizer 6 to the egg 2 in the container 5. The sluice valves 12 and 13 are adapted to switch between circulating hot water and supplying water. The heat exchanger 11 adopts an indirect heating method, supplies heated steam from the steam valve 14, and exchanges heat with hot water. At the time of cooling, the cooling water is circulated from the cooling valve 15 through the cooling tower 16 by the water pump 17 to rapidly cool the hot water.

An example of manufacturing the boiled egg according to this embodiment is as follows. Treatment conditions 90 ° C, 7 minutes, pressure 3KG, cooling 10 minutes, pressure 3KG Egg breaking condition Only 2 out of 180 eggs (1.1%) Good yolk condition (soft) White condition good (hard) shell Good peeling

[0016]

INDUSTRIAL APPLICABILITY In the present invention, raw eggs arranged neatly in a pallet are loaded into a container and loaded into a retort sterilizer. In the retort sterilizer, rapid heating and rapid cooling were performed under pressure, so it is possible to prevent egg rupture due to an increase in the internal pressure of the egg.
It is now possible to obtain high-quality processed eggs with a firm white egg and a soft yolk in a short time.

Therefore, as a boiled egg for takeout at a convenience store or an egg for business use such as a family restaurant, it is possible to provide a stable processed egg with a good yield with an egg breaking rate of about 1%.

[Brief description of drawings]

FIG. 1 is a perspective view of a main part of a pallet

FIG. 2 is a perspective view of a main part of the container.

[Fig. 3] System diagram of retort sterilizer

[Explanation of symbols]

 1 Pallet 2 Raw egg 3 Support column 4 Half egg type recess 5 Container 6 Retort sterilizer 7 Pressurizing valve 8 Sprayer 11 Heat exchanger 15 Cooling valve

Claims (1)

[Claims] 1. A container in which a large number of raw eggs are statically fixed on a pallet made of heat-resistant plastic through a semi-egg-shaped recess of a supporting column, and a container in which a plurality of the pallets are stacked and accommodated is provided. A plurality of them are stacked and loaded into a retort sterilizer, pressurized to about 3KG by a pressure valve, and heated indirectly by a heat exchanger at a temperature of about 90 ° C for about 7 minutes in a hot water spray or hot water. A method for producing boiled eggs using a retort sterilizer, which comprises performing a pressurizing and heating step, then immediately performing a pressure reduction and a rapid cooling step using cooling water from a cooling valve, and taking out from a retort sterilizer.