Adding an appropriate amount of animal and vegetable oil to the feed not only improves the energy level of the feed, but also improves the appearance quality of the pellet feed. The step of adding fat to the feed can be placed before granulation and after granulation; the amount added before granulation generally does not exceed 3% of the production amount, otherwise it will cause problems such as loose particles after granulation, and is not suitable for puffed feed. Production process, but the equipment requirements are lower; after granulation, the surface treatment of the pellet feed (ie grease spraying), the maximum addition amount can reach 8%, solving the problem of the effect of adding grease on the solidity of pellet feed, directly improve The productivity is more suitable for the production of expanded feed, but the requirements for equipment and use are higher. 1. The basic structure, basic requirements and working principle of grease spraying 1. The basic structure (figure omitted). There are two main types of granular feed oil spray: one is to spray when the particles are extruded, and the other is to spray after the particles are classified. However, the requirements of the two forms in the oil supply and electronic control parts are the same. The grease spraying machine is mainly composed of a self-controlled oil storage tank, a coarse and fine filter, a control valve, compressed air, high pressure steam and a controller. The liquid level device, temperature controller, heating parts and agitator of the self-control oil storage tank are mainly used to heat the oil to 60-80 ° C as soon as possible to reduce the viscosity of the oil and facilitate the flow and material absorption. The coarse and fine filter prevents impurities from clogging the oil circuit, so that various valves, gauges and nozzles can work normally. Compressed air or high-pressure steam is mainly used to atomize the grease, so that the grease can be sprayed in the material in the form of a mist to achieve uniform spraying effect. The spray controller is a key component that automatically adjusts and displays the amount of grease flow, with integrated, oil-deficient alarms and flow deviation alarms. In addition to the above, the heating and heat preservation of the oil circuit is also indispensable, it can melt the residual grease of the pipeline as soon as possible and keep the grease constant during the use of the system. 2. Basic requirements (1) The control components in the pipeline should be able to work reliably, and there is no oil leakage or steam leakage on the pipeline. (2) A certain working pressure should be guaranteed in the oil and steam roads, generally 0.2-0.5Mpa. (3) The pipeline must be equipped with a coarse and fine filter for filtering impurities, preventing clogging of the nozzle, and equipped with a detection device to detect the accuracy and reliability of the spray amount. (4) The oil storage tank and the fuel injection part should be equipped with heating equipment. The pipeline should be covered with thermal insulation material to prevent the oil from solidifying. (5) There should be a high degree of automation, so that the amount of grease sprayed can be changed according to the feed amount of the sprayer, thus ensuring the correctness of the amount of grease sprayed. (6) The spraying rate of the grease spraying machine should be set according to the needs of the user. (7) It should be ensured that the width of the mist-like grease sprayed from the nozzle can evenly cover the flow path of the material and reduce the waste of grease. 3. Working principle When the grease enters the oil storage tank from the oil pool or oil drum through the coarse filter, the steam heating tube is automatically heated to 60-80 ° C, and the pipeline is also heated to a predetermined temperature during the process (the oil tank must be equipped with a stirrer to enable The overall heating of the grease is uniform and the accuracy of the temperature measurement is ensured, and the temperature can be adjusted according to the viscosity of the grease). When it is determined that the oil path is clear, grease spraying can be performed. When spraying, the grease enters the solenoid valve through the speed regulating pump, the check valve and the fine filter, and is sprayed on the surface of the particle under the action of compressed air. The spraying amount is sent to the programmable controller through the elliptical gear flow transmitter for processing, automatically adjusting the speed of the speed regulating pump, changing the flow rate, so that the actual spraying amount reaches the preset value. Dome Head Open End Blind Rivets Dome Head Open End Blind Rivets,Head Open End Blind Rivets,Dome Open End Blind Rivets,Dome Head Open Blind Rivets KD METALS (JINGJIANG) CO.,LTD , https://www.toprivet.com