Understanding of Aseptic Compressed Air Preparation Li Li, Liu Xiaofeng (Heilongjiang China Resources Alcohol Co., Ltd., Heilongjiang Jidong 1511 (1)) 0 Foreword With the advancement of modern fermentation technology, in addition to the use of alcohol breeding to provide oxygen, purge pipelines, instruments Wind, compressed air is also continuously used in other large-scale alcohol fermentation systems, such as in the adjustment tank, liquefaction tank, saccharification tank, fermenter instead of mechanical agitation, instead of reciprocating pump, centrifugal pump to transport materials, etc., to prevent For contamination of bacteria and other non-biological contamination, it is required that clean and sterile air be required to enter the production process. How to prepare sterile compressed air has become one of the key links in alcohol production. Filtration sterilization is the most common method used in the fermentation industry. It uses a regularly sterilized medium to block the flow of microorganisms contained in the air. When the pores of the filter medium are smaller or smaller than the diameter of the filtered particles, they are usually called For absolute filtering.

1 filtration sterilization mechanism 1.1 inertial shock retention mechanism 1.2 interception retention mechanism 1.3 brown diffusion mechanism 1.4 gravity sedimentation mechanism 1.5 electrostatic adsorption mechanism 2 compressed air sterile filtration basic process alcohol plant compressed air sterilization device mainly by Air compressor, air tank, cooler, oil water separator, second cooler, second gas tank, air filter, dryer, gas tank, compressed air tube, workshop second and third stage filtration. The production process is as follows: ※High-altitude wind-pre-filter oil-water separator oil-free air compressor ※ After cooler-※High efficiency filter-dryer gas tank secondary filtration-three-stage filtration 2.1 high-altitude wind to improve compressed air 5米的空气中, In the air, in the air, in the air, in the air, in the air, in the air, in the air, in the air, in the air, in the air, in the air, in the air, in the air, in the air Microbial content can be reduced by an order of magnitude. Generally, the suction pipe is set at a height of 20~30m in the factory to reduce the bacteria content of the inhaled air.

2.2 Deoiling and water removal equipment industry, assistant engineer, mainly engaged in alcohol technology and laboratory analysis, published 2 papers.

Degreasing and dewatering are the most basic steps in the clean treatment of compressed air. Oil is a direct pollutant, and water will cause corrosion of the pipeline and the proliferation of microorganisms. The problem of degreasing and dewatering is the basis of medium efficiency filtration and high efficiency filtration. In the absence of degreasing and dewatering equipment, the pipeline will be seriously corroded, and the pollution of oil and rust will cause the subsequent filtering equipment to quickly become clogged and the service life will be greatly reduced. General oil-free oil-free compressor to improve the drying effect of the non-thermal regenerative drying device 2.3 The medium efficiency filter of the device is generally 5~1 (Fm filter is a medium-efficiency filter for capturing large particle mechanical impurities such as rust powder. The use of activated carbon-glass fiber composite filter, polypropylene, glass fiber cartridge filter can greatly improve the service life of air compressor.

2.4 High-efficiency filtration Wm filter is a high-efficiency filter that can block most bacteria and other impurities. It can adopt a folded cylindrical structure filter with large filtration area, low resistance and high efficiency. The filter cartridge of polypropylene fiber material is a very good high efficiency filter material.

2.5 The compressed air used in the secondary and tertiary filtration alcohol plants is generally sterilized by the total filter, but when transported to each gas point, due to the long distance of transportation, it is often equipped with secondary or even tertiary filtration. Filtration can be used as a sterile metal membrane filter core, and adopts vortex shear cross-flow filtration technology, the filtration precision can reach 0.2Mm, the third-stage filtration can adopt a folding filter core, and the filtration precision can reach 0.01Mm to improve the sterilization of compressed air. degree.

2.5.1 Air filtration requirements for sterile membranes 2.5.1.1 The use temperature <150C, can withstand repeated thermal shocks during the service life without the possibility of sealing failure due to deformation, denaturation, etc.

1.2 permanent hydrophobic properties, that is, the film surface can not form water droplets, its role has three points: one is the formation of contact points for bacterial proliferation, the second is not to accumulate water in the hole to ensure ventilation, and the third is to maintain high insulation performance and surface negative Sex, to reject microorganisms that are also negatively charged.

1.3 The material used can not be absorbed by microorganisms. 1.4 The maximum pore size of the membrane should ensure absolute retention of microorganisms. 1.5 Maintain corrosion resistance under high temperature and high humidity, and can be operated in high temperature and dry air. Easy to install and maintain.

2.6 Filter performance Microporous membrane filters can be divided into three types, single-piece flat filter, folding filter cartridge, laminated filter, considering the installation, filtration area and pressure factors, single-piece flat filter, the second white wine modern technology Senior Seminar Summary The 2nd Liquor Modern Technology Advanced Seminar was held in Mianzhu City, Sichuan Province from September 20th to 25th, 2003. Participants include the general manager of liquor business, the deputy general manager and chief engineer responsible for technical work; the sixth national liquor jury and the technical staff; the technical and production management backbone of liquor enterprises. There are 155 people from 94 enterprises in 24 provinces, autonomous regions and municipalities directly under the Central Government.

The opening ceremony of the seminar was delivered by the Deputy Secretary-General of China Food Industry Association, Executive Vice President of the China Food Association Baijiu Professional Committee, and Secretary-General Ma Yong. Qiu Tianming, Chairman and General Manager of Jiannanchun Group, Wei Xihe, Vice President of Sichuan Food Industry Association, and Cai Hailiu, Vice President of Jiangxi Food Industry Association, attended the meeting and delivered speeches. More than 20 people attended the opening ceremony of the seminar, including experts and professors, and leading comrades of the Provincial Food Industry Association and the Provincial Brewing Association.

This seminar has the following characteristics: 1 The seminar is rich in content and there are 8 lecture teachers, which are explained from different aspects. It not only elaborates on the taste of liquor, but also explains the flavor style genre, the wine flavor design and the sensory evaluation system. It also talks about the product development and declaration approval process of health wine; it talks about the production process of liquor and the liquor product. The detection method and the safety of the liquor.

2 The seminar has a new idea to discuss the new generation of white wine quality control packed column of gas chromatograph and solid phase micro-extraction technology for the analysis of liquor flavor; the theoretical and technical elements of wine flavor design are discussed; the liquor solubility is studied, and the liquor is studied. Have a new understanding.

3 kinds of seminars used 4 days to carry out theoretical study. It took two and a half days to identify the five grade base wines produced by Jiannanchun Group and 15 flavors of famous wines. A total of 20 samples of 4 rounds were evaluated. . The teacher used the method of commenting on the side and received a good result.

The seminar was combined with lectures and academic exchanges. There were 9 papers in this seminar. There were 7 young and middle-aged liquor technical leaders who had a technical exchange.

The paper was selected and the excellent papers of the 2nd Liquor Modern Technology Advanced Seminar were awarded to the selected papers. It will be recommended for publication in the relevant brewing press.

During the seminar, the company also visited the plant area and production process of Jiannanchun Group. The company attaches great importance to scientific research, relies on technological innovation and scientific and technological progress, adjusts product structure, and takes the road of quality and efficiency enterprise development, enhances the competitiveness of products and the vitality of enterprises, and becomes a large taxpayer and industry leader.

On the completion of the seminar, the second certificate of the senior seminar on modern technology of liquor was awarded to the students.

The participants in this seminar reflected that the seminar participants and lecture teachers had a high level and the content of the seminar was new, reflecting the new technical level of the liquor industry. The trainees believe that in the first half of this year, the liquor industry struggled to overcome the serious impact of SARS, sales revenue reached 26.093 billion yuan, an increase of 6.78% over the same period of last year; profits reached 223 billion yuan, an increase of 2.71 over the same period last year. %. The investment in fixed assets is active, and the pace of technological transformation is accelerating. It shows that over the past year or so, the backbone enterprises of liquor have been facing the market, and they have worked hard to optimize the product structure. In general, the operating conditions have become better. Everyone is confident to make a good result for the whole industry in 2003 and make new contributions to the promotion of the new development of the wine industry.

All the participants in the seminar had created hard work for the seminars before the arrival of the production and sales season in Sichuan Jiannanchun Group Company during the critical period of enterprise restructuring, the large amount of conference work and thoughtful and enthusiastic service for the seminars. I am grateful for the good study conditions.

Not selected for sterile filtration of air.

2.6.1 Folding filter cartridge The folding filter cartridge is a classic form of microporous membrane filter. It is characterized by large filtration area and installation. The vinylidene chloride and PTFE filter cartridges are excellent in all aspects.

2.6.2 Laminated filter The newly emerging microporous membrane metal filter is a stainless steel structure that presses several microporous membranes together by mechanical fastening, which is characterized by avoiding the heat of the folding filter cartridge. The plastic seal guarantees excellent thermal shock resistance. Another feature is that it only replaces the diaphragm, and the running cost and maintenance cost are very low.

3 The traditional method of microbial detection is to use the method of directly blowing the dish with air on the spot. The specific operation has great randomness, because the air source flow rate is uncertain, the sampling port size and environmental conditions are not clearly defined. The reliability of the data is poor, and the membrane filtration test method in the article on biocontamination and prevention is replaced, so that the microbial content of the sampling point can be measured more accurately.

4 Conclusion With the continuous improvement of social process technology capabilities, the level and production technology of the alcohol industry will continue to improve and improve, and the preparation technology of aseptic compressed air will reach a higher level. In the production process, strengthen the awareness of aseptic control, improve the technical level, select a reasonable and effective air sterilization process, sterilize the compressed air preparation equipment regularly, and use advanced scientific technology to obtain high-quality compressed air, which can reduce compressed air. Harm to alcohol production.

Air Cannon, also known as air to flow, broken GongQi, air, are suddenly out of the compressed gas turbulence, the speed of more than a Mach (sound) directly into the storage medium material block fault zone, the sudden release of the expansion of the shock wave, overcome the static friction materials, and make the container of the material flow back again.

Air Cannon

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