Method and equipment of cultivated silkworm fresh cocoon quick-freezing for cocoon suffocation

Abstract

The invention provides a quick freezing pupa killing method for fresh silkworm cocoons, particularly comprising the following steps that: solid dry ice is taken as a cold source to absorb heat of the fresh silkworm cocoons, and simultaneously carbon dioxide obtained through sublimation of the dry ice is taken as the cold source to blow over the fresh silkworm cocoons and exchange heat with the fresh silkworm cocoons so as to make the temperature of the fresh silkworm cocoons reduced to below a given temperature and maintain for a period of time. The invention simultaneously provides a device for realizing the method, comprising an insulated cabinet body and an endless apron, wherein, a cold source cabinet body is arranged on the upper part of the insulated cabinet body, and the solid dry ice is arranged inside the cabinet body; the bottom of the cold source cabinet body is provided with a heat exchange plate; a cold blast pipe is arranged on the lower side of the endless apron, and anopening of the cold blast pipe faces to the endless apron; the cold blast pipe is communicated with the cold source cabinet body; and a fan is arranged on an inlet end of the cold blast pipe. By adoption of the method and the device, the pupa killing production cycle can be obviously shortened and the labor efficiency can be obviously improved; moreover, because pupae are killed at a low temperature, fresh cocoon shells and pupal cells maintain natural state, thereby the quality of the fresh cocoon shells and the pupal cells is slightly influenced and good-quality raw materials are provided for the silk reeling technique and deep-processing of fresh pupae.

Description

technical field [0001] The invention relates to the processing technology of silkworm fresh cocoons. In particular, it relates to a silkworm fresh cocoon quick-freezing method and equipment for killing pupae. Background technique [0002] After the fresh cocoons of silkworms are purchased, they are generally baked into dry cocoons in a coal stove, and stored in a cocoon warehouse at room temperature for cocoon cooking, silk reeling and silkworm chrysalis processing. This is a traditional technological route for decades. The process of baking silkworm cocoons and silkworm chrysalis at 105-110°C for 6-8 hours will cause the denaturation of cocoon sericin protein and silkworm chrysalis protein. Fatty acids such as chrysalis oil will become rancid due to oxidation, resulting in foreign matter, which will affect further processing. The traditional process of baking fresh cocoons at high temperature to form a set of dry cocoons, cooking cocoons and silk reeling has the following ...

AI Technical Summary

Problems solved by technology

[0003] 1. During the baking process of silkworm cocoons, due to high temperature treatment, the denaturation of silkworm cocoon sericin and the destruction of silkworm chrysalis protein and fat

Cause a series of adverse effects caused by cocoon cooking and silk reeling process;

[0004] 2. The cocoon drying cycle of the coal stove is 2 days, the work efficiency is low, and the workers operate under high temperature conditions for a long time, which has adverse effects on health, and the exhaust gas emitted by the coal stove will pollute the environment;

[0005] 3. During cocoon cooking and silk reeling, sericin has a high rate of dissolution and loss, resulting in increased reeling folds;

[0006] 4. The unwinding rate decreases, resulting in a decrease in the cocoon silk production rate, an increase in knots, etc., which affects the quality of raw silk;

[0007] 5. The cocoon cooking process is complicated, including vacuum cocoon cooking and cooking process, which takes a long time and consumes a lot of steam;

[0008] 6. After the silkworm cocoon is baked, the protein denatures, the pupa oil becomes rancid, and produces peculiar smell, which makes further processing difficult

The method of cold storage and preservation of silkworm cocoons provided by this technology requires a large-scale cold storage, and requires a long-term freezing temperature of -12 to -6°C, which requires high equipment conditions and high energy consumption. Discarding the library will cause waste

In addition, the humidity in the cold storage is relatively high, which has a negative impact on the quality of silkworm cocoons

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