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Technological innovation is the key to the core competitiveness

After the harvest of fruits and vegetables, life is not over, there is still respiration, that is, to absorb oxygen, carbon dioxide and water. In the process of metabolism, a large amount of respiratory heat is produced, so that nutrients are continuously consumed and a large amount of water is lost. As a result, fruits and vegetables wither, change color and soften, and reduce vitamins, resulting in deterioration and loss of commodity value. The only way to weaken the respiratory intensity of fruits and vegetables is to quickly reduce the temperature of fruits and vegetables to reduce their respiratory heat. Low temperature can not only inhibit the growth and reproduction of microorganisms, but also inhibit the activity of enzymes in food, delay the change of chemical composition in fruits and vegetables, and maintain the nutritional value and color, aroma and taste quality of food. The quality of fruits and vegetables can be improved by proper treatment after picking. Vacuum pre-cooling is considered to be an effective method to slow down the ripening of fruits and vegetables after picking and to ensure food quality.

2021

What causes the vacuum pump efficiency

Low steam pressure and pressure fluctuations have a greater impact on the ability of the vacuum pump, so the steam pressure should not be lower than the required working pressure, but the structure design of the vacuum pump has been finalized, and too much steam pressure will not increase the pumping capacity and vacuum. In addition, to ensure that the steam pressure supplied by the boiler is stable, it is best to use a boiler to provide working steam to the steam jet pump, so that the steam pressure will not fluctuate and the performance of the vacuum pump will be stable.

2021

Difference between theoretical vacuum and ultimate vacuum

The two concepts of theoretical vacuum and ultimate vacuum are similar and are commonly used in the field of industrial vacuum equipment, such as rotary vane vacuum pumps, screw vacuum pumps, vertical oil-free vacuum pumps, slide valve vacuum pumps, water ring vacuum pumps, etc.

2021

The working principle of vacuum pump oil

In the vacuum pump, the vacuum pump oil is not only used as the medium to obtain the vacuum, but also plays the role of lubricating, cooling and sealing the mechanical friction point.

2021

The working principle of water ring vacuum pump

Water ring vacuum pump (referred to as water ring pump) is a kind of rough vacuum pump, it can obtain the ultimate vacuum of 2000~4000Pa, series atmospheric ejector up to 270~670Pa. The water ring pump can also be used as a compressor, called a water ring compressor, which is a low-pressure compressor with a pressure range of 1~2 × 105Pa gauge pressure. Water ring pump was originally used for self-priming pumps, and then gradually used in petroleum, chemical, machinery, mining, light industry, medicine and food and many other industrial sectors. In many industrial processes, such as vacuum filtration, vacuum water diversion, vacuum feeding, vacuum evaporation, vacuum concentration, vacuum moisture and vacuum degassing, water ring pump has been widely used. Due to the rapid development of vacuum application technology, the water ring pump has been paid attention to in the rough vacuum. Since the gas compression in the water ring pump is isothermal, it can pump out flammable and explosive gases, and in addition to dust and water-bearing gases, the application of water ring pumps is increasing.

2021

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