Air compressor cooler design Jin Weiping, Feng Jian, Zhu Hongpiao Zhejiang Yiwu city on the 2 monosodium glutamate factory belongs to glutamic acid fermentation liquid submerged aerobic fermentation, cultivation process requires a large supply of sterile compressed air.
And the air contains a variety of microorganisms and dust and sand. Especially in the south, the climate is warmer and humid. There are more bacteria. If we do not effectively remove bacteria, we will send the air to the fermentor, which will lead to serious economic losses in the fermentation process.
How to effectively remove these microorganisms and dust sand according to the information, the microorganism in the air with bacteria and bacterial spores are also yeast fungus and viruses, these microorganisms vary in size, generally attached to dust in the air or on the droplet.
The amount of miscellaneous bacteria in the air is usually a knife in the summer.
Winter is half less than summer.
In the winter, the air is dry and the moisture content is lower than that in the summer. As a result, the lower the moisture content in the air is, the less the number of bacteria is.
Therefore, we can try to reduce the moisture content in the air, so that most of the water vapor condenses into droplets, and the bacteria are attached to the drops to eliminate the bacteria.
1111 it can be seen from the table that the lower the compressed air temperature under the same pressure, the less the moisture content in the air.
Therefore, we can take the heat out of the compressed air compressor for cooling the compressed air temperature decreased, moisture content decreased (a part of water vapor condenses into droplets and then by the cyclone oil and most bacteria etc. separated through the jacketed heater to appropriate temperature air compressed to 35 the compressed air in the low relative humidity conditions into the filter, so as to improve the filtration efficiency of filter.
As shown in the compressed air to keep high moisture content, compressed air relative humidity of two if the state of the compressed air temperature to the moisture content of 35 as a constant resistance, according to the West and Shi Shuo plant Ding Gung Jili compressor outlet air temperature, surface powder one or two material keep one or two training a a P a simplification to a few hundred Ecuador's clever C, check the saturated water vapor pressure meter to check the water vapor pressure of compressed air is saturated by air, moisture content of air steam tables 10 when the saturation water vapor pressure by or saturation water vapor partial pressure due to coincidence the air phase two double to 15 for fear of tile Temple of Tian Jia two humidity so as to ensure the filter medium dry compressed the relative humidity to a cooling, pressure drop, small resistance, improves the sterilizing effect.
According to the above analysis, the effect of the air cooling bacteria removal system is good or bad, and the cooling effect of the cooler plays a key role.
The design parameters of air cooler resistance in air compressor air dry bulb temperature and relative humidity of two out of the compressor air pressure several compressor inlet air dry air moisture content two.
The compressor inlet air water vapor pressure Jier to Wanshui first stage steam heat air cooler cooling area calculation of first air cooler air cooling to the temperature of the cooling water by 35 to two o dry weight of air is dry air compressed air from cooling to the condensation of condensed water volume W 21 for the first level of the air cooler heat load compression by air cooling to the heat from the water vapor, compressed air from cooling to heat a water steam is condensed into water to heat water table check saturated water vapor in the latent heat of vaporization nourishing fermentation technology communication volume, the average temperature difference between the temperature of the compressed air two flat shirt 21 urn a first level like hunger cooler cooling area of seamless steel tube heat transfer coefficient and figure two Gan cooler tube arrangement graph of a mountain 1 flat one or two and second stage air cooler cooling area calculation of second empty The compressed air from the gas cooler cooling to 10 freezing brine temperature by rose is calculated through the same, it is calculated that second air cooler heat load. The mean temperature difference in flat turtle = because of compressed air through the first stage air cooler, the separation of most of oil and water, more clean, so the heat transfer coefficient of the second stage air cooler the heat transfer coefficient of the first stage air cooler than the big.
According to the relevant information, it is recommended that the cooling area of the second stage air cooler is long and hungry.
The lining structure design of the original cooler cooler design considering the fin tube heat transfer area of heat exchanger tube than the same number, length of the light tube heat exchanger is many times larger, and the condition of the same heat transfer area has low cost small volume, covers an area of and other advantages.
Therefore, the primary cooler adopts the heat transfer tube as the vertical fin fin tube riser type heat exchanger.
The tube is thick, and the air is compressed between the pipes and the cooling water is in the pipe.
The diameter of the cooler to Zhao as an example, the cooler tube arrangement figure but, according to the long-term use, the original cooler has the following shortcomings: first of all, the compressed air pipe due to the shell without baffles, and around the heat transfer tube and the inner wall of the shell between the six arc-shaped gap area is about heat transfer tube the gap.
The arc gap block has a large area of compressed air, hydraulic resistance is small, so there are about six arc through the air gap flow, so that the cooling effect is affected, in addition, due to the compressed air flow direction and the vertical fin, plus some corrosive gases in the air corrosion, after one year will make the fin off thus, accumulation of heat exchange area is greatly reduced.
At the same time, because the tube wall is only thick, one year, the heat transfer tube wall was found to be damaged by corrosion.
Secondly, the cooling water in the pipe is used.