【 Weak current College 】 CA storage technology development and application of---Power By 【 China power house network 】

Summary: the so-called controlled atmosphere storage environment is improved cold gas composition. Controlled atmosphere storage and is internationally recognized as the most effective methods of preservation of fruits and vegetables. Abroad, CA storage technology has more general application.

I. controlled atmosphere storage technology development
What is CA storage, improved storage environment gas composition of cold storage methods.

CA storage study was started from the storage of fruit. In 1860, the United Kingdom one scholar has established a seat tightness better Apple storage test Gallery, Gallery of seal is made of steel plate, with ice for cooling, temperature of not more than 1 ° c, the effect is good, but the results of this study is at the end of that time. Until 1929 and 1933, respectively, the United Kingdom and the United States to set up the first commercial gas library trying. In 1941, the United States issued a bulletin that provides gas composition and temperature of the reference data, and officially known as CA storage.

Strictly speaking, in 1962, previous Ma, is the use of fruit to drop oxygen breathing techniques, this is a "natural law" reducing oxygen controlled atmosphere storage, MA. Self-combustion gas generator advent begins mechanical methods to control the storage environment, which is a gas composition "decreasing oxygen method" controlled atmosphere storage, i.e. CA storage. The storage technology has entered a new phase.

Controlled atmosphere storage and is internationally recognized as the most effective methods of preservation of fruits and vegetables. Abroad, CA storage technology has more general application.

The history of our country such as fruits have to be placed in the bamboo-RI, wagang or cellar storage of records. Tang Yang thousands of products to the story of Litchi, lychee in slub-RI, attracted to Chang'an. There are also people hoard, burial, are similar to the Ma MA.

>Our CA storage development later, 1978 in Beijing was built the first 50 tonnes of experimental CA air-conditioned library. MA storage development earlier, mainly vegetables and fruit.

Shaanxi Province CA storage technology research center is specialized in controlled atmosphere storage technology research unit, the use of EC assistance for experimental composite slab structure, air conditioned cold storage through the use of management practice, conducting research on storage technology, achieved gratifying results.

1992-the civil air conditioned cold test of a complete success, as the science and technology achievements promotion and application in the country have made a positive contribution.

In the last decade, China's Ma career development faster. At present, the Shaanxi Provincial atmosphere the number and size of the cold store, the first in the country. It is foreseeable that the CA storage technology will be more widely applied.

Second, the principle of controlled atmosphere storage and features

The principle of controlled atmosphere, is the establishment of specific appropriate low temperature, oxygen, carbon dioxide, ethylene content and relative humidity of the storage conditions of the technical means; in the maintenance of normal life activities of fruits and vegetables, fruits and vegetables to effectively suppress respiration, evaporation and microorganisms role of technical means to achieve the physiology and metabolism of delaying the fruits and vegetables, to postpone the senescing and prevent deterioration of purpose.

CA storage features, boils, maintaining the original quality of fresh fruits and vegetables, reduce storage losses, suppression of physical diseases of fruits and vegetables and to extend the storage period and shelf life.

3. the classification of controlled atmosphere storage

The atmosphere can be divided into cold storage structure category combination plate-type atmosphererefrigerator, civil engineering-atmosphere-cave-cold storage and refrigeration storage atmosphere.

By air-conditioned environment control method of gases can be divided into natural reduced oxygen method (MA), MA, decreasing oxygen method (CA) storage and pressure drop oxygen atmosphere storage method. MA during storage can be divided into plastic bags-MA Ma, Silicon form plastics account-MA Ma and room-MA Ma. CA storage can be divided into plastic tent-CA controlled atmosphere storage and room type CA CA storage.

The storage process parameters control methods can be divided into automatic, semi-automatic and manual control of cold atmosphere.

IV. common main gas equipment

Commonly used gas equipment mainly down ozone, carbon monoxide removal machine, in addition to the ethylene machine and humidifier. These devices are manufactured in China.

Comes with instructions, reducing ozone (nitrogen) after the combustion falling-ozone, nitrogen, carbon molecular sieve hollow-fiber membrane nitrogen of upgrading and development process. Combustion type drop oxygen machine has been eliminated. Hollow fiber membrane nitrogen, technical performance, product quality is reliable, affordable, and has been widely use. Xi'an ultrafiltration purification Engineering Co., Ltd. production of hollow fiber membrane nitrogen generator, its technical standards, product quality, price and service, has a strong market competitiveness.

V. storage technology in other areas of application

CA storage technology development, mainly in fruits and vegetables based on freshness. With the development of the commodity economy, people pay more attention to the products of CA storage technology applications much wider. Except for CA storage, used as meat inflatable packaging storage, food storage, flowers, air-conditioned, luxury air-conditioned and traditional heritage of controlled atmosphere storage saves, etc.