Development status, problems and development direction of tea refining equipment technology
|作者: yxqzcj|发布时间: 2019-09-03|232 次浏览Source:|Author: yxqzcj|Published: 2019-09-03|232 views分享到:|Share to:
The purpose of refining famous tea is to classify the tea, classify the shape of the tea, remove the impurities in the secondary tea and tea, control the moisture in the tea, improve the quality of the tea, and standardize the quality of the tea
The purpose of refining famous tea is to classify the tea, classify the shape of the tea, remove the impurities in the secondary tea and tea, control the moisture in the tea, improve the quality of the tea, standardize the quality of the tea, and maintain the quality stability. To better meet the needs of consumers, the following is a simple analysis and discussion on the current status and development of tea refining machinery and equipment technology.
I. Status of main stand-alone technologies
1.Circular screen machine, shake screen machine
The circular sieve and shaker sieved the length and thickness of tea, respectively. At present, the basic use conditions such as production efficiency and screening efficiency are better.
The problems are: (1) Due to the need for manual sieving, the sieve bed cannot be closed, causing a large amount of tea dust to leak out. To this end, various automatic screening mechanisms have been developed, but the results have been unsatisfactory; (2) the noise is relatively serious; (3) the mechanical equipment is generally not refined. There are silly, big and rough phenomena.
Possible solutions in the future are: (1) change the existing woven screen to a metal screen, and then cooperate with the automatic cleaning mechanism to achieve a closed sieve bed to completely solve the problem of tea dust contamination of the circular screen and shaker; ) The screen bed is too heavy, and the transmission structure is not reasonable, causing serious noise. Can be addressed from these two aspects. It should be particularly pointed out that the crankshaft connecting rod mechanism used by the tea shaker needs to be rethought. Because a vibration motor can be used instead of the crankshaft connecting rod mechanism. The crankshaft connecting rod mechanism is complex and fragile.
2. Tea cutting machine
Tea cutters are highly productive. The main problem is that too much powdered tea is produced while the tea is cut to a certain size. And we want to cut the tea to a certain size while minimizing powdered tea. This requires further development. There are now a large number of different shredders in other industries. You can learn from other industry shredder technology to solve the problems of tea cutters. Now broken tea has risen, and the broken tea cutting machine does not have this difficulty.
3. Ladder type, static type tea picking machine
Picking stems is a labor-intensive process, because with the stepped, electrostatic tea picking machine, the manual workload has been greatly reduced. The main problem of the stepped stem picking machine is that the single machine has low production efficiency. From the analysis of the mechanical structure of the stepped stem picking machine, the design is now relatively complete, and it is unlikely that the mechanical structure will be greatly improved to improve production efficiency. A possible way to improve machine production efficiency is to combine multiple stepped stem picking units into a stepped stem picking module, which can automatically load and unload materials. The electrostatic stem picking machine used to pick hair, small yellow pieces, tendons, etc. The working principle is that the electrical properties of these foreign bodies are different from normal tea. At present, the performance of the electrostatic picking machine behind the selection of heterochromatic films is behind the computer color sorting machine. With the decline in the price of computer color sorters, the chance of electrostatic picking is more severe. The electrostatic stem picking machine has advantages in selecting special foreign bodies such as hair. The main problem of the electrostatic stem picking machine is that there are many factors that affect the working situation, and the machine is difficult to master. It solves the problem of automatic and efficient tea picking, and realizes the mechanization of tea production and processing, which greatly improves the production efficiency and the grade of tea.
4.Computer color sorter
A few years ago, most people didn't know about the high-tech product of computer color sorter. But now many tea factories have tea computer color sorters. The tea computer color sorter can replace some people to pick. Computer color sorter is a high-tech product that uses color to sort. It is suitable for sorting tea with a more uniform particle shape. But it is not suitable for tea with uneven shape and large particles. The main problem of the tea computer color sorter is that the queuing and conveying mechanism of tea needs further development. Now the price of tea computer color sorter has dropped a lot. However, there should be a lot of room for price drops. In the future, it is still necessary to vigorously develop a computer color sorter for picking stems and sorting operations. It is also suggested that computer-made color sorters be widely used in refined tea factories in the future.
[Working principle of color sorter] The color sorter is first used for grain (mainly rice) processing. The color sorter can remove the heterochromatic grains in rice and greatly improve the appearance quality of the rice. Is widely used. As the commercial tea is mainly granular and string-like, and the color of the same tea variety is the same, the color sorting machine can remove the heterogeneous tea (things) in the same product, so this product was later promoted and used in tea refining Processing.
5, even stacking boxer
Uniform stackers are widely used in tea factories in tea producing areas and tea factories in sales areas. Their structures are divided into traveling box type and drum type. The main disadvantage of the traveling box type is the leakage of tea dust, and the main disadvantage of the roller type is the broken tea. Nowadays, most of them use the driving box style. In order to solve the problem of leakage of tea dust, a small number of traveling box-type uniform stacking boxers adopt a fully enclosed structure, which is in good use. In the future, the fully-enclosed traveling box-type uniform stacking boxer is the development direction.
Evenly stacked is a match. Lipton Black Tea Company of the United Kingdom is relying on matchmaking to occupy the world market. Therefore, even stacking and packing machine is of great significance.
Problems and development direction of tea refining machinery and equipment
Future development The main problems of tea refining and processing machinery and equipment are: serious leakage of tea dust, high labor intensity, high tea break rate, low production efficiency of some machinery, and serious mechanical noise of some machinery.
The main problem of tea refining and processing pollution is tea dust pollution. There are two methods to solve the tea dust pollution, one is to vacuum, and the other is to fully close the single machine. The settling speed of tea dust is very small and it is difficult to vacuum. Therefore, it is mainly to develop a clean single machine through fully enclosed measures. With the clean single machine, we can develop a clean and refined production line. So as to solve the problem of tea dust pollution and labor intensity.
Solving the problem of broken tea should start from two aspects: mechanical improvement and processing technology improvement. Purely from the mechanical aspect, broken tea is caused by many factors such as the machine's surface is not smooth, the tea is stressed too much, and the direction of the tea force is not equal.
Most tea refineries are in cities, and fuel selection is a challenge. Coal-burning pollution is large and the policy does not allow it. Burning clean fuels is costly. Now anthracite burning in some tea refining plants is a feasible solution. The best solution is to use a boiler for heating. However, some machinery and equipment must be adapted to use steam.