China
March 7, 2013
Grass seed after harvest must as soon as possible for processing, otherwise moldy because of the the grass high humidity piled up easily, and cause the seed to lose its vitality. Only processed seeds did not have the storage conditions, only processed seeds can become a commodity.
Drying is an important step in the processing of grass seed grass seeds after drying not only ease of processing, and processing after long
Term preservation. The general field harvesting grass seed humidity is above 18%, some as high as 30% or more, before processing the humidity must be reduced to 12% to 13%. 40 ℃ ~ 45 ℃ hot air drying is commonly used, and average hourly reduce humidity 2%. Hot air drying of a variety of forms, some using packing arranged in line or the bottom of the layout of ventilation; Some packing the bottom of the three-dimensional arrangement of ventilation; and some continuous drying device. Most of the heating device for fuel oil or coal to heat the air, also elected some selection of grass seed waste as fuel, the seeds are dried to humidity check humidity to meet the requirements to enter the primaries machine .
The primaries machine used to clear the grass seed in the larger impurities, such as broken leaves and stems. The primaries machine used in all screening, some the primaries machine in the rear of the feed device to set a length of about 1 m-by Artemisia used to remove the stem. After the primaries machine processing the seed into than mount or brush kinds of machines.
In addition Mans machine, brush kinds of machine function than mount and brush eup hair, and grass seeds separately bonded together, and clear the grass
Seed on the dirt, dust and mud.
The first cleaning is the grass seed finishing the first step. First cleaning by screening and winnowing of two parts, the screening is carried out according to the the seed thickness or width selection. Usually for the screening of the two layers, the first layer of screening allows the seeds and less than the grass seed material through the material greater than grass seed is cleared; second layer of screening material through only allows greater than grass seeds, less than grass seeds The material was clear. Seeds are to be preserved longer be winnowing, winnowing according to sieve different materials floating performance immature grass seed and moth-eaten seeds are separated from the good grass seed. First cleaning seed into a secondary cleaning.
The second cleaning depending on the length of the seed cleaning equipment Wo eye roller cleaning grader. The nest eye geometry is designed according to the length of the grass seed cleaning grass seed selection has a different nest eye roller. Normal circumstances with a group of the two fossa eye roller advice, the first drum Clear length greater than the grass seed material, and the second roller to remove less than the material of the grass seed.
Demanding or difficult cleaning of grass seeds, after the above step such as the requirements are not met, but also to add some special cleaning step, it is most commonly used is the gravity cleaning machine. It is the use of the difference in weight between the material particles are separated. Grass seed on the sieve surface with the pores and hair up from the lower part of the sieve surface so that the grass seed in a floating state, the sieve surface is inclined, working it as a lateral vibration in the vibration grass seeds is divided into different levels, in order to final cleaning purposes. Gravity cleaning is very effective for clearing sand, clear very close to the size and shape and normal weed seeds weed seeds.
By cleaning seeds are mixed with drugs or coating, mixed with drugs and the coating is to increase production of important measures, mixed with drugs, the coating generally in a mixing the drug machine or coating machine. Mixed with drugs, the role of the coating has three: ① to prevent fungal growth, to facilitate long-term preservation or no deterioration in the long-distance transport; ② prevent the seeds were sown into the field after the invasion by pests and diseases; ③ add some drugs promote germination and growth, promote crop growth .
In order to facilitate the planting of small seeds, and some irregular seed pelleting. The purpose of pelleting In addition to the three role with mixed drug coated seeds outside wrapped in a layer of weighting agent so as to achieve the purpose of increasing body weight gain, to create the conditions for the reliable operation of the machine sowing and aerial.
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