Please read this before you start business for making Cassava starch:
First, production process of making cassava starch:
Cassava Selection → Weighing and conveying → Washing and conveying → Cage cleaning → Washing and conveying → Crushing → Coarse grinding → Pressure sieve → Fine grinding → Secondary to quartic sieve → Desander → Fine filter → Rotary filter → two disc separation → white → rotary filter → cyclone washing dehydration → dehydration → product packaging.
1. Selected raw materials:
The quality of the finished starch is closely related to the selection of raw material, If the cassava is less than 10 months, the yield is low, while cassava with more than 24 months have been qualitative, to the crushing, grinding caused greater difficulties, making the rate of increase in cost reduction, are affecting economic efficiency, requiring the first step must be good raw materials storage.
The purpose of cleaning is to go to the sand, to the soil, peeled, reducing the starch ash, but also facilitate the work of the next procedure. In the transport at the same time for cleaning, so the material should be uniform, too much There is no gap within the cage, cassava can not roll, reach the purpose of skinless and cleaning. Too little to reach production. Operators should pay attention to the pressure of water, water pressure is too low to take the sand, the general water pressure can not be less than 0.25Mpa, always pay attention to the operation of the cage and conveyor, can not form the backlog of raw materials in this process. The machine is generally working seven days plus a lubricant.
As the cassava root is very long, close to the main bar has been lignified, if not broken can not be crushed. The purpose of the first broken in order to ensure the normal operation of the mill. Some plants do not crushing process to increase the load on the mill, reducing service life. Second, in order to fully improve the starch yield and quality, improve starch yield.
Operation to observe the motor temperature and machine sound, the sound suddenly becomes smaller, indicating that the crusher memory too much material, this time should reduce the amount of feed. Add the return water to the right amount, less can not take away the broken material, resulting in a waste. In addition to master the V-belt tightness, triangular belt too loose, reducing the crusher efficiency, too tightly to increase the motor load, damage to the motor shaft, so the operator to concentrate, not leave the post, strict rules. Crushing quality is good or bad, a direct impact on the class production and the next procedure. Broken block diameter generally 1cm is appropriate.
After crushing the cassava (diameter 1cm or so) slurry mixture into the crusher. Crushing process at a crushing and secondary crushing, why should the crushing twice? First, because the cassava is too long, too much lignified material, such as a crushing, starch yield can not meet the requirements, the second is a concentration of a crush Destroying the starch quality of cassava, cassava starch will be large particles, crushed into small particles, can not fully free the starch out, an increase of the difficulty of filtering starch. So now we are divided into two crushing, the first crushed pulp residue, first into the first pressure song sieve, so that high-quality starch first filtered out, a pressure song sieve under the big slag add a certain amount of return water to make it Into the second crushing, the second crushed fine residue, and then into the second pressure song sieve, the most advanced grinding process, not only did not destroy the quality of starch, and crushed by adding return water, the starch yield increased 3 -5%.
Starch plant in the economic accounting, water consumption and starch yield is two important indicators, so this stage process in the use of return water and add water during the operation, we must have the right amount, there is a curved sieve back to the water hit a certain Of the amount of work with the full convergence of the process, the use of water that is able to take away the crushed material, it will not result in waste. Grinder running an hour after the mill contact with the mill bearing cover to see if the temperature rise, and then observe whether the motor temperature is increased, strictly control the amount of feed. Due to the lignification of the material too much, more difficult to crush, such as the occurrence of the machine is not working properly, should be shut down to clean up, in the grinder above a square mouth, first manually clean the upper, then pocket access to the mouth, To completely discharge the lignified material broken. In the clean-up materials, there should be special care to start the switch to prevent accidents from happening.
In the course of operation, pay attention to the crusher to keep the number of materials, timely start transfer transit pump, the material sent to the procedure. From the washing conveyor to the broken, smashing the entire package of equipment is continuous operation, crushed by the transit pump will be sent to the slurry after the process, so this section will play the role of the operator on the next, the entire equipment from the normal continuous operation To the important role.
Cassava chips, with a belt conveyor pulp after weighing the cassava chips to 100 kg per minute speed into the washing cage, remove the dust, the screw conveyor into the hammer mill twice crushed, in order to reduce the dry powder flying , To reduce losses, with the induced draft fan through the separator, the dry powder into the slurry pool, with a mixed flow pump slurry will pump into the immersion tank, immersed in hot water at 40 ℃ for 5 hours after the pump into the mixing tank, adjust the concentration,and then into a slurry residue separation step.