In the past two years, with the entry of Australian sorghum barley and American sorghum into the Chinese market, the application of sorghum barley in feed has been increasingly accepted by the market. As a substitute for corn feed, sorghum barley has been used in more feed enterprises.
In the past two years, with the entry of Australian sorghum barley and American sorghum into the Chinese market, the application of sorghum barley in feed has been increasingly accepted by the market. As a substitute for corn feed, sorghum barley has been used in more feed enterprises. At the same time as more research on nutrition, the research of its production process can not be ignored.
First, the difference in the crushing process
There is a big difference in the understanding of the crushing size of sorghum barley at home and abroad. According to the Australian feed mill and farm self-ingredient data, the difference in sorghum barley smashing process is likely to lead to low production efficiency. In vitro starch digestion test proves that the larger the pulverization particle size, the lower the digestibility, and the smashing particle size of sorghum or barley cannot be greater than 1 mm. Other studies have concluded that for hard sorghum and soft sorghum, the ideal degree of comminution is 300 microns - 500 microns. But as the age of pigs and chickens increases, the ideal particle size also increases. The author believes that the smashing strength of sorghum barley should pay more attention to the principle of more suitable tempering granulation. The particle size is small, the unit weight of the feed contact surface is large, and the tempering is more sufficient. Therefore, the sorghum barley feed granule size is not easy to be too large (not recommended) More than 1.2mm). It is generally believed that the hammer mill is more capable of reducing the crushing size than the pair of roller mills.
Second, the material moisture control mixing
The moisture content in the powder before quenching and tempering is an important parameter, which has a great impact on the quality of feed products, feed processing efficiency, equipment loss, animal absorption of feed nutrients and animal performance. Sorghum barley requires higher temperature and low humidity steam due to quenching and tempering. Therefore, for better tempering and granulating, the moisture after mixing is especially important. The author thinks that the moisture should be controlled at 12-13% after mixing, because most Good granule moisture is 15%-16.5%. For every 1% increase in moisture, the temperature of the material increases by 11 degrees. Therefore, if the moisture is too low after mixing, the temperature of the material will not reach the optimum temperature. When the moisture is too low after mixing, it is recommended to pass. An aqueous solution of a liquid antifungal agent is added for adjustment.
Third, the steam requirements are higher when
Quenching and tempering is an important part of feed production. The quality of steam plays a decisive role in the quality of quenching and tempering. Quenching and tempering is the process in which steam transfers moisture and heat to the feed. Only dry saturated steam can quickly transfer heat to the feed. The heat transfer of saturated steam is instantaneous. Due to the low heat capacity and poor heat transfer performance of superheated steam, superheated steam requires a self-cooling process of 2-3 minutes, and the quenching and tempering process is less than 3 minutes, so the quenching and tempering cannot be completed well. The heat capacity of the wet steam is also very low, and the secondary evaporation will further reduce the heat energy. The moisture content will also hinder the heat exchange between the steam and the feed, causing the local water to be high, which is easy to cause granulation and slippage, and the local moisture is high. After that, it is not easily taken out during cooling, and it is easy to cause local mildew.
In sorghum barley, due to the rich starch and fiber, if it is tempered, if wet steam is used, it will be more likely to slip; if superheated steam is used, due to insufficient conditioning, starch gelatinization will be poor, and granulation will be difficult. Therefore, the steam requirement is higher than that of corn feed.
How to get dry saturated steam? I believe that the following measures must be done:
1. The steam pressure from the boiler must be guaranteed. Generally speaking, the steam coming out of the boiler must be guaranteed to have a pressure of more than 6 kg.
2, the delivery pipeline must achieve the minimum loss: to use the appropriate diameter of the pipeline, to minimize the length of the pipeline. When it is not possible to reduce the length of the pipeline, it is necessary to do the slope of the pipeline (100:1 inclined to the direction of steam transport), and to add a trap at the bottom of the pipeline for effective hydrophobicity every 50 meters or so
3. Before entering the conditioner, it is necessary to effectively reduce the pressure and adjust the steam pressure to the appropriate pressure (different conditioners, different materials, different quenching pressures). The general quenching pressure is not easy to exceed 4 kg
4. The steam pipe after decompression should be larger than 1.5 times of the conveying pipe, and it must be effectively drained. Under normal circumstances, there must be a riser before entering the conditioner, the bottom enters the steam, the upper end enters the conditioner, and the bottom is made hydrophobic. To prevent condensate from entering the calibrator
5, after decompression should pay close attention to temperature and pressure, check the temperature according to the pressure to ensure that the steam is saturated steam (for example, the pressure after decompression is 0.2MPa, corresponding to 2.04 kg, by querying its temperature should be 120.24 degrees, when the temperature is too high, which steam is superheated steam, when the temperature is too low, wet steam is), under normal circumstances the pressure pipe should be insulated after treatment, reduced pressure steam is more conducive to the temperature corresponding to the temperature dropped
Fourth, the difference between granulation ring model
Because sorghum barley has a lot of starch and more fiber, it needs more extrusion to ensure smooth granulation. Therefore, the opening ratio of the ring mold is not too high, otherwise the reduction of the area of ​​the flare will reduce the feed. The amount of extrusion, which makes granulation difficult and reduces the granulation capacity, the author believes that the ring mold of the same compression ratio, the use of sorghum barley feed compared with corn feed feed, the ring mold opening rate is slightly lower.
1) MXTD series square drive hydraulic torque wrench is made of aviation aluminum alloy material. Its quality and durability are well guaranteed. The one-piece design makes it more widely used and more adaptable.
2) MXTD square drive torque wrench adopts advanced precision ratchet drive. The torque output accuracy is higher, and the maximum output repetitive torque is ±3%. The maximum working pressure is 70MPa, and it has 12 models with torque from 185Nm to 160000Nm. It is the product with the most complete specifications and the widest bolt coverage of TorcStark.
3) MXTD square torque wrench has a 360° x180° rotary tubing joint, which has a wide range of applications. The 360° x180 ° trigger lock can place the 360° fine-tuning reaction arm on any fulcrum. The direct-push drive shaft design can quickly switch between tightening and disassembly states, and the locking drive shaft can be customized according to your requirements.
4) The square head size of the MXTD square drive hydraulic wrench is 3/4"-4". It can be used with TorcStark`s special square drive socket and can be applied to bolts of various specifications.
Hydraulic torque wrench; hydraulic tools
Yantai Dongyue Hydraulic Technology Co., Ltd , https://www.deeleap.com