Effect of various factors affecting granulator efficiency

LIMA Fish Feed Machine,Chicken Feed Machine

It is understood that many feed mills have caused yields fail to design requirements due to the problems of the process arrangement and operational technology of the particles, and the surface of the particles is not smooth, the hardness is low, and the content is high. The main cause analysis of the granulator production efficiency is now analyzed in the process of granulation process:

1. Raw factors

Raw material factors directly affect the effect of granulation, material with high starch content Easy to be vaporized, these raw materials have a certain viscosity, which is conducive to particle formation. For raw materials having high thick fiber content, a quantity of grease is added, and the friction between the material and the ring mold can be reduced during granulation, which is advantageous to pass the surface of the material, and the particle appearance is smoother after forming. Generally, the amount is about 1%, which is too high, which is easy to cause plenty of particles. If there is a need to add more grease, it can be considered after granulation, especially suitable for high energy feed. The particle size of the pulverized raw material determines that the surface area of u200bu200bthe feed is, the finer particle size, the larger the surface area, the faster the water absorbed in the vapor, and is also easy to form the material to be molded. From the granulation angle, the pulverization is thin, the granulation is high, but there are many steam, and the slightly do not pay for easy blocking, and the raw materials are smashed too fine, resulting in high power consumption. The particle size is thick, increased ring mold and hindbus wear, difficulty in granulation, especially small aperture ring molding, and cause polarization effect, resulting in high energy consumption, low yield, high granular content. Therefore, there is usually a livestock and poultry feed, and the pulverized corn should be used in 2.5 ~ 3.0mm sieve plates, that is, the particle size can be avoided, and the particle size required for the feed sufficient regulating, which is beneficial to reduce the content of the particles. In addition, we must pay attention to the mixing uniformity before the granulation, because the feed formulation is complex, and the specific weight difference between the various raw materials is large. For different formulations, different varieties, different mixing time, so that the mixing uniformity variation is about 5%, give The granulation steps lay a good foundation.

2. Feed Flow Control

In order to make the granulator unstoppon a full load, the material flow of entering the granulator must satisfy the granulation need, the feed structure is required. Effectively eliminating the phenomenon of time break due to cake. Taking the SZLH40 granulator as an example, the flow of flow should not be less than 10t / h. To be stabilized by adjusting the stream of the feeder in actual production, it is reasonable to directly install a slow position above the granulator, if not set The buffer position, or a longer tube (0.5m or more) between the buffer bin and the feed, it is difficult to ensure that the income amount is stable. Many feed mills are not normal when granulator production is not normal, but they are busy looking for reasons in the granulator itself, and ignore the incoming factors. In fact, the production efficiency decline is caused by unstable flow rate. In general, when the granulator operation is smooth, the steam is sufficient, the feed gate is all open, the feeder speed is transferred to the rated value and the main motor does not meet the rated electrical value, it can be judged that the incoming stream is insufficient. At this time, the reason should be identified, and the argumentSymptoms.

3. Steam quality control Energy to effectively increase the yield of granulator and improve particle quality. Steam is a source of moisture addition during conditioning, which is a heat source of feed starch. Adding a certain amount of steam is added to the regulation, which can kill a part of the bacteria in the feed, but also dilute the natural binder in the feed, so that the outside of the particles in each fine particle in the material can form a thin layer of aqueous layer, which is conducive to the material. It is easy to granulate, thereby improving the quality of the particulate feed. The correct steam pipe design must ensure steam pressure and flow, and effectively prevent the condensed water in the pipe from entering the stront. The steam bag should be as close as possible to the granulator to increase the quality of the steam, as steam quality is essential to the granulator, steam that is not enough purity will cause the granulator to block or produce feeds that do not meet the requirements, and it is prone to a series of failures. Suitable saturated vapor pressure should be 0.2 ~ 0.4 MPa, when the pressure is too low, the fixed conditioning time does not reach the mass registration indicator; when the pressure is too high, the steam temperature is also high, and the steam is passed through the heat transfer of the material. The temperature is increased, which is likely to cause high temperature, low moisture, local material burning, etc., affect the quality of granulation. To ensure that the steam pressure is always stable, the pressure fluctuation is generally not greater than 0.05 MPa, and the design of the steam pressure and the steam line system is not open. Generally, the water is about 12% in front of the raw material injection, and the steam pressure is low, so low moisture materials can select pressure, low vapor. When the moisture is greater than 16.5%, the water content is made of high water content, which is not easy for a long time to be kept; when the moisture is less than 15%, the granulation consumption is low, and the barrower is low. The tension temperature is closely related to steam pressure and steam amount, and also changes in season. Generally, the temperature of the livestock feeding is about 85 degrees, the temperature in winter is low, the temperature regular temperature should be low, the summer room is high, and the tensile temperature is high. High vapor pressure, small amount of vapor absorbed, and is gelating, suitable for materials having high water. The steam pressure is low, the amount of vapor absorbs the amount of vapor, the absorption moisture is also much, and it is metained, suitable for materials having a low water.


4. Production operation Correct control of the pressure roller and the stamper gap. The gap of the roller is too small, and the pressure mold is easily worn, and the super noise is large; the gap is too large, then the material is extruded. Generally controlled from 0.05 to 0.30 mm. When adjusting, you can measure the ruler, and you can do so you can. Taking the new mode new roller as an example, the pressure compression roller is similar to the non-relying on, but the host rotation pressure does not vent the pressure roller when the material is not material, especially emphasizes that the new mode should be equipped with a new roller and the gap should be small. Different pressure rolls should be sufficient to add butter (usually high temperature 7 lithium-resistant lithium nipple) to avoid overturn the burnback bearing due to temperature. At the same time, it is necessary to adjust the feed blade, otherwise it will be difficult to enter the pressure roller and the stamper, and a part of the material is string from the pressure-shaped cover, forming a particle powder, and adjusting the particle powder.The whole result should be that the upper edge curve of the doctor blade is substantially controlled between 2 to 3 mm, and the front end of the doctor blade is not suitable for exceeding the inner hole of the bore. When the granulator is adjusted, it can be opened. First open the granules, a tunmer, and feeder, and the feeder should be in a small feeding state. In order to prevent inner debris from entering the stamper, the outer discharge door on the operation door should be opened, and the material is mixed with a debris. After the treatment is clean, the material can be introduced into the die. For careful renewal, the hand should hold the machine exhaust door handle, first allow the part to enter the mold, then observe if the particles are smoothly developed, and at the same time pay attention to the current change. If the particles can be made normally, the current is more stable, the fluctuation is not large, and the rated current can be increased, and the amount of material can be increased, and the vapor is increased until the rated current is reached. If the material enters the granulant, there is no particle out of the mold, and the current is constantly rising. This is to open the exterior discharge door. When the observation continues to feed, the current declines. If the current drops, some particles are molded, can hold the outer discharge door handle, allowing partial material to introduce the mold, partially extracted, observe whether the current is smooth, whether the stamping is smooth, such as normal materials can be all Imported compression. If the current is stopped after the feed is still not decreased, even continued to rise, it should be downtown, and the cause of the confession should be disappeared. What is worth reminding is that when it is initiated, don’t rush to steam, because the material is less, the steam is difficult to add to the desired amount, the steam is more, the material is small, very easy to block, is not as good as the amount of treatment to add to a certain amount Steam steam. In addition, the granulator must be added to the pressure mold before get off work, and its object is to prevent the material in the mold hole from being hard to granulate the next turndom compression die.

5. Ring Mode

Whether the material can be extruded in the granulation process through the mold on the size of the pressure and frictional force generated in the mold hole. This is related to the compressibility of the friction coefficient, moisture content, raw material particle size, temperature, and material plastic deformation portion, and the compressibility of the material plastic deformation portion, and the compressibility of the material plastic deformation portion. In general, the pressure-mold hole diameter compression ratio adopts 1: 8 to 1: 13 (i.e., the effective thickness ratio of the mold hole and the molding), the compression ratio of the pressure mold is small, the effect of effective length of the pressure mold hole is short, and the material is in the stamper. The pressure formed in the hole is small, easy to extruding the ring mold, therefore high yield, but the resulting particles are loose, the content of the content is high, the appearance is not smooth; the longer the effective length of the compression hole is, the material is in the pressure mold hole The larger the pressure, the corresponding particulates are high, the particle smooth quality is good, and the powder content can be reduced, but the yield of granulator will decrease, and of course, the ton energy consumption is also increased accordingly. Therefore, when the feed manufacturer produces different specifications and varieties of pellets, the selected loop aperture ratio will vary.

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