With the rapid development of China's aquaculture industry, especially the increasing proportion of aquaculture industry with increasing economic benefits and the increasing number of cultured species, a variety of aquatic feeds based on hard pellet feed floated pellet feed have emerged.
Because aquatic animals such as fish and shrimp have small intestines and poor digestion and absorption capacity, the processing technology of aquatic feed is far higher than the requirements of livestock and poultry feed processing technology. Therefore, it is particularly important to select aquatic production equipment. To choose the production equipment for aquafeeds, we must first understand the many characteristics of aquafeeds:
1. Small particle size. Due to the short digestive tract and related physiological characteristics of aquatic animals, in order to speed up digestion and absorption, aquatic feed should be smaller than the crushed grain size of livestock and poultry feed. For example, the production of squid and prawn feed should have a particle size of 80 mesh-120 mesh.
2. High protein content and low carbohydrate content. The protein content of livestock and poultry feed is generally less than 20%, while the protein content of aquatic animal feed is mostly 30-40%, and the protein content of soft-shelled turtle feed is as high as 65-70%.
3. The pellet feed structure is compact, has high cohesiveness and water resistance, and the shrimp material requires the stability of the pellet bait in water for more than 2 hours.
4. Aquatic feed production, cross-contamination is strictly forbidden, some raw materials need to be aseptically processed, the equipment used is easy to clean and less residue, especially when producing shrimp and squid feed, other kinds of feeds should not be produced at the same time to prevent cross-contamination .
To produce high quality aquafeeds, we must rely on scientific and reasonable processing techniques and combine them with advanced, reliable and stable processing machinery. The choice of processing equipment is especially critical.
The choice of feed mill generally generally requires 40-60 mesh for the production of ordinary fish feed. However, when producing special aquatic pellet feed (shrimp, dips, dips, etc.), the particle size of the raw materials must be 80. Above the target. The pulverization particle size of the raw material determines the surface area of ​​the feed composition. The finer the particle size, the larger the surface area, the stronger the ability to absorb water in the vapor before granulation, which is good for quenching and tempering and granule formation, so that the granules have good water stability and can be extended in water. The residence time of the product body has good absorption effect, which can improve the feeding return and reduce water pollution. To achieve the desired comminution particle size, the previously used hammer mills have not been suitable for the production of fish feed. At present, the popular "drop-type" pulverizer at home and abroad is an advanced pulverizer model introduced by developed countries in Europe and the United States in the 1990s. This machine fully exploits the advantages of the terrarium pulverizer and uses a unique design idea, a pulverizer. Two types of hammer screen gaps can be formed for ordinary pulverization and fine pulverization, and the pulverization particle size is more uniform, and the fine pulverization particle size conforms to the production requirements of common fish feed. After the model was put on the market, it was favored by the feed manufacturers. In the domestic models, the Zhengchang Yousheng 88 crusher was selected for more feed mills.
If special aquatic feeds such as shrimp, squid, turtle, crab, etc. are produced, the pulverization particle size is required to be finer, and the ordinary pulverizer can not meet the requirements of micro pulverization, and the micro pulverizer must be used.
The micro-pulverization of aquatic feeds is often carried out by a secondary pulverization process, that is, coarse pulverization and fine pulverization. The second pulverization in the past is to use a micro-pulverizer plus a micro-segmentation machine to achieve the required pulverization size. The process covers a large area, and the size of the pulverization is achieved by replacing the sieve plates of different apertures and adjusting the air volume of the system, and it is easy to cause the pulverized material to wet and rise sharply, the nutrient components are destroyed, and the screen is often blocked. Causes equipment wear and waste of energy. If the sieveless micro-pulverizer is used to eliminate the influence of the sieve plate, the micro-pulverizer with the classifier can save the material return processing, the material temperature is low, the power consumption is saved, the output is high, and the thickness can be adjusted as needed, and it is not necessary. A separate micro-segmentation machine is available.
Zhengchang SWFL series vertical shaft micro-grinder is a micro-grinding equipment that combines crushing, screening and separation to meet the crushing granularity requirements of special aquatic feed. Since the crushing chamber and the classification chamber are located inside the same body, the crushing, wind filtering, separating and re-grinding processes can be simultaneously performed, and the over-grinding can be effectively prevented. Built-in high-precision micro-scale wind classification, crushing particles up to 60 mesh -200 mesh, and can be adjusted freely. The pulverized material has a low temperature rise and is especially used for heat sensitive materials. The whole process is compact in structure, small in floor space, low in electricity consumption per ton of material, uniform in product size and high in output. It is an ideal micro-grinding equipment for producing special aquatic feed.
The choice of mixing equipment Feed mixer is one of the key equipment of the feed factory. The batch mixing system is an important part of the whole feed factory. The performance of the mixer and the effect of the application directly affect the production efficiency and products of the feed mill. quality. The mixers used in general feed mills are still dominated by conventional leaf-belt horizontal spiral mixers. This mixer has a long mixing period and the mixing uniformity is not suitable for the production of aquatic feed. In recent years, with the rapid development of high-performance computerized batching scale electronic technology, its performance is superior to that of ordinary computerized batching scales, especially the batching cycle has been shortened to about 2 minutes. Therefore, the ideal mixer should be selected in the batch mixing section. The production cycle of the mixer should be equal to or similar to the batching scale, so as to ensure the accurate ratio of the batch mixing system, high mixing quality and normal operation, so that the productivity of the section can be maximized. Good state, thus effectively ensuring mixing effect, increasing production and reducing costs. From this point of view, the conventionally used blade horizontal spiral mixer has been unable to be used with more and more advanced computerized batching scales, which significantly hinders the improvement of productivity in this important part of the mixing of the feed mill ingredients.
In summary, it is best to use horizontal double-axis blade blender for the production of aquatic feed. The relatively new Zhengchang SSHJ series double-axis blade high-efficiency mixer uses a new mixing mechanism to achieve the required mixing uniformity. The machine utilizes the principle of instantaneous weight loss to make the material in the machine body to produce a full-scale compound cycle, which is widely interlaced without dead angles, so as to achieve uniform diffusion and mixing. The whole mixing process is mild, does not cause segregation, and does not damage the original physical state of the material. . The mixing uniformity is high, the CV reaches 3-5%, the speed is fast, the optimal mixing time is 30-120 seconds, and the loading amount is variable. The discharging adopts the bottom unloading and wide opening door structure, and the discharging is quick and no residue; the discharging door is sealed reliably, and there is no leakage phenomenon; the discharging control can be adopted in two forms of electric or pneumatic as needed. The machine is equipped with a liquid adding tube, which can add liquid such as oil and fat, mainly adding soybean oil, rapeseed oil and fish oil for the purpose of adding: (1) Increasing the energy value of the feed to make the fish and shrimp grow more plump. (2) Enhance the protective effect on water-soluble vitamins. The amount of oil added can be determined according to the variety of aquatic animals and the feed ingredients.
Because aquatic animals such as fish and shrimp have small intestines and poor digestion and absorption capacity, the processing technology of aquatic feed is far higher than the requirements of livestock and poultry feed processing technology. Therefore, it is particularly important to select aquatic production equipment. To choose the production equipment for aquafeeds, we must first understand the many characteristics of aquafeeds:
1. Small particle size. Due to the short digestive tract and related physiological characteristics of aquatic animals, in order to speed up digestion and absorption, aquatic feed should be smaller than the crushed grain size of livestock and poultry feed. For example, the production of squid and prawn feed should have a particle size of 80 mesh-120 mesh.
2. High protein content and low carbohydrate content. The protein content of livestock and poultry feed is generally less than 20%, while the protein content of aquatic animal feed is mostly 30-40%, and the protein content of soft-shelled turtle feed is as high as 65-70%.
3. The pellet feed structure is compact, has high cohesiveness and water resistance, and the shrimp material requires the stability of the pellet bait in water for more than 2 hours.
4. Aquatic feed production, cross-contamination is strictly forbidden, some raw materials need to be aseptically processed, the equipment used is easy to clean and less residue, especially when producing shrimp and squid feed, other kinds of feeds should not be produced at the same time to prevent cross-contamination .
To produce high quality aquafeeds, we must rely on scientific and reasonable processing techniques and combine them with advanced, reliable and stable processing machinery. The choice of processing equipment is especially critical.
The choice of feed mill generally generally requires 40-60 mesh for the production of ordinary fish feed. However, when producing special aquatic pellet feed (shrimp, dips, dips, etc.), the particle size of the raw materials must be 80. Above the target. The pulverization particle size of the raw material determines the surface area of ​​the feed composition. The finer the particle size, the larger the surface area, the stronger the ability to absorb water in the vapor before granulation, which is good for quenching and tempering and granule formation, so that the granules have good water stability and can be extended in water. The residence time of the product body has good absorption effect, which can improve the feeding return and reduce water pollution. To achieve the desired comminution particle size, the previously used hammer mills have not been suitable for the production of fish feed. At present, the popular "drop-type" pulverizer at home and abroad is an advanced pulverizer model introduced by developed countries in Europe and the United States in the 1990s. This machine fully exploits the advantages of the terrarium pulverizer and uses a unique design idea, a pulverizer. Two types of hammer screen gaps can be formed for ordinary pulverization and fine pulverization, and the pulverization particle size is more uniform, and the fine pulverization particle size conforms to the production requirements of common fish feed. After the model was put on the market, it was favored by the feed manufacturers. In the domestic models, the Zhengchang Yousheng 88 crusher was selected for more feed mills.
If special aquatic feeds such as shrimp, squid, turtle, crab, etc. are produced, the pulverization particle size is required to be finer, and the ordinary pulverizer can not meet the requirements of micro pulverization, and the micro pulverizer must be used.
The micro-pulverization of aquatic feeds is often carried out by a secondary pulverization process, that is, coarse pulverization and fine pulverization. The second pulverization in the past is to use a micro-pulverizer plus a micro-segmentation machine to achieve the required pulverization size. The process covers a large area, and the size of the pulverization is achieved by replacing the sieve plates of different apertures and adjusting the air volume of the system, and it is easy to cause the pulverized material to wet and rise sharply, the nutrient components are destroyed, and the screen is often blocked. Causes equipment wear and waste of energy. If the sieveless micro-pulverizer is used to eliminate the influence of the sieve plate, the micro-pulverizer with the classifier can save the material return processing, the material temperature is low, the power consumption is saved, the output is high, and the thickness can be adjusted as needed, and it is not necessary. A separate micro-segmentation machine is available.
Zhengchang SWFL series vertical shaft micro-grinder is a micro-grinding equipment that combines crushing, screening and separation to meet the crushing granularity requirements of special aquatic feed. Since the crushing chamber and the classification chamber are located inside the same body, the crushing, wind filtering, separating and re-grinding processes can be simultaneously performed, and the over-grinding can be effectively prevented. Built-in high-precision micro-scale wind classification, crushing particles up to 60 mesh -200 mesh, and can be adjusted freely. The pulverized material has a low temperature rise and is especially used for heat sensitive materials. The whole process is compact in structure, small in floor space, low in electricity consumption per ton of material, uniform in product size and high in output. It is an ideal micro-grinding equipment for producing special aquatic feed.
The choice of mixing equipment Feed mixer is one of the key equipment of the feed factory. The batch mixing system is an important part of the whole feed factory. The performance of the mixer and the effect of the application directly affect the production efficiency and products of the feed mill. quality. The mixers used in general feed mills are still dominated by conventional leaf-belt horizontal spiral mixers. This mixer has a long mixing period and the mixing uniformity is not suitable for the production of aquatic feed. In recent years, with the rapid development of high-performance computerized batching scale electronic technology, its performance is superior to that of ordinary computerized batching scales, especially the batching cycle has been shortened to about 2 minutes. Therefore, the ideal mixer should be selected in the batch mixing section. The production cycle of the mixer should be equal to or similar to the batching scale, so as to ensure the accurate ratio of the batch mixing system, high mixing quality and normal operation, so that the productivity of the section can be maximized. Good state, thus effectively ensuring mixing effect, increasing production and reducing costs. From this point of view, the conventionally used blade horizontal spiral mixer has been unable to be used with more and more advanced computerized batching scales, which significantly hinders the improvement of productivity in this important part of the mixing of the feed mill ingredients.
In summary, it is best to use horizontal double-axis blade blender for the production of aquatic feed. The relatively new Zhengchang SSHJ series double-axis blade high-efficiency mixer uses a new mixing mechanism to achieve the required mixing uniformity. The machine utilizes the principle of instantaneous weight loss to make the material in the machine body to produce a full-scale compound cycle, which is widely interlaced without dead angles, so as to achieve uniform diffusion and mixing. The whole mixing process is mild, does not cause segregation, and does not damage the original physical state of the material. . The mixing uniformity is high, the CV reaches 3-5%, the speed is fast, the optimal mixing time is 30-120 seconds, and the loading amount is variable. The discharging adopts the bottom unloading and wide opening door structure, and the discharging is quick and no residue; the discharging door is sealed reliably, and there is no leakage phenomenon; the discharging control can be adopted in two forms of electric or pneumatic as needed. The machine is equipped with a liquid adding tube, which can add liquid such as oil and fat, mainly adding soybean oil, rapeseed oil and fish oil for the purpose of adding: (1) Increasing the energy value of the feed to make the fish and shrimp grow more plump. (2) Enhance the protective effect on water-soluble vitamins. The amount of oil added can be determined according to the variety of aquatic animals and the feed ingredients.
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