Automatic Cleaning of the Tank
The tank cleaning can be done by an automatic tank washer, a tank washer with a spray ball, and a mechanical (or rotary jet type) two. The spray ball-type tank washer sprays the cleaning fluid to the wall of the tank head or the upper part of the tank, and then the cleaning fluid flows down the wall of the tank. In general, the cleaning solution will form a film attached to the tank wall, so the mechanical effect of washing is minimal. The washing effect mainly depends on the chemical effect of the cleaning agent (such as dissolution) to achieve.
Using mechanical can washers can enhance the mechanical effect of rinsing. The cleaning solution sprayed by the mechanical tank washer can be sprayed directly to each point of the tank biscuit and to each place to form the impulse spray wash. The radius of action of the special spray ball type tank washer can reach 5m, and the flow of washing liquid reaches 60m3/h. The radius of action of the general spray ball type tank washer is about 2m, the flow of washing liquid is about 12m3/h, and the nozzle outlet pressure should be 2-3MPa.
For vertical tanks and pressure measurement points in the case of the outlet of the washing pump, not only do you need to consider the pressure loss caused by pipeline resistance but also to consider the height of the impact of the cleaning pressure. When the pressure is too low, the action of the tank washer radius is small, the flow is not enough, the spray cleaning fluid can not be covered with the tank walls, and the pressure is too high when the cleaning fluid forms a mist, making it challenging to form a downward flow of water film or spray cleaning fluid is bounced back by the tank wall, reducing the washing effect.
In the cleaned equipment is dirty and the tank diameter is large (d>2m), the general use of a mechanical tank washer, by increasing the tank washer outlet pressure ((0.7MPa) to increase the washing radius and cleaning intensity. Compared with the spray ball-type tank washer, the mechanical tank washer can use a lower flow of cleaning fluid.
Cleaning of Pipeline
The focus of pipe washing is to give full play to the mechanical role to improve the washing effect. Because when washing the pipeline, the flow state has a great impact on the washing effect, the fluid in the pipe is easy to stratify when the flow rate is slow, and the flow rate of the fluid in the pipe changes from the center to the edge in a speed gradient (slowing down), so that washing off dirt is challenging. Therefore, in pipeline cleaning, we must use a higher flow rate so that there is the formation of vortex and turbulence in the pipeline.
When cleaning with cold cleaning fluid, different pipe diameters require different flow rates of washing fluid in the pipe to achieve good washing effects.
When cleaning with hot cleaning fluid, the flow rate of the cleaning fluid in the tube is kept at 1-1.5m/s. Attention must be paid to the cleaning of CO2 and compressed air pipelines and their accessories, which should be carried out at least five times a year.
Heat Exchanger Cleaning
Heat exchanger and pipeline cleaning, in principle, is the same. The heat exchanger is in normal working condition; the medium is turbulent. If the design flow is 20%-30% higher than the cleaning fluid for cleaning, you can get a good cleaning effect.
Equipment Machine Parts and Machine Evolution Washing
There is no uniform cleaning mode for this equipment; you can follow the equipment cleaning instructions. In the use of hot cleaning fluid soaking equipment (such as filters), the tank should maintain a positive pressure to ensure that the outside air cannot enter when the cleaning fluid cools.
Washing of Hoses
The washing temperature and cleaning time of the hose should be determined according to the technical requirements of the product. A general hose can only be cleaned with alkaline detergent, oxidizing acidic detergent, and disinfectant, which will accelerate the aging of the hose, making the inner surface of the hose becomes rough, and cracks of fine emblems appear.
This makes the cleaning of hoses more difficult, so the use of hoses should be reduced as much as possible. The service life of the hose is generally 3-4 years, and the expired hose should be eliminated in time.
Cleaning of Tank Top Components
The cleaning of cone-bottom tank roof parts (such as safety valves and vacuum valves) is the weak link in brewery sanitary management and should be taken seriously. These parts should be cleaned in the cleaning process of the tank. Depending on the characteristics of the components and the design of the installation site, the appropriate cleaning method can be selected for cleaning.
The ultimate goal of cleaning and sterilization is to keep all parts and equipment in contact with the product free of deposits and surviving emblematic organisms, thus ensuring the hygiene of beer production. Sanitary inspection is an important tool for the quality control of beer; therefore, it is also necessary to carry out the inspection of emblematic organisms and sanitary supervision of all relevant production stages.
