Theoretical papers of Industrial Boiler Operators Test questions 1. theoretical knowledge Part 1.Basic knowledge of pressure, temperature, medium, fuel, combustion, heat transfer, water circulation, etc;A: 2.Structure and features of various boilers;A: 3.The function, structure, principle and precautions to ensure sensitivity and reliability of boiler safety accessories;A: 4.Functions, maintenance management points and Operation precautions of various thermal instruments, automatic control and chain protection devices;A: 5.Auxiliary equipment of boiler such as water supply, water treatment, combustion, ventilation, slag removal, ash blowing, smoke removal and dust removal and other auxiliary equipment and structural features, functions and Operation essentials of relevant circulation systems;A: 6.Basic knowledge of boiler water treatment and common water treatment methods;Answer: 7.Management and operation points of boiler operation;Answer: 8.Common phenomena, causes, treatment methods and prevention of boile

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Composition of drip irrigation equipment for drip irrigation equipment In any water source of the filtration device, it contains various impurities to varying degrees, while the aperture of the emitter outlet in the micro-irrigation system is very small, and the emitter is easily blocked by impurities in the water source. Therefore, strict filtration treatment of irrigation water sources is an essential first step in micro-irrigation, and it is a key measure to ensure the normal operation of micro-irrigation system, prolong the service life of the sprinkler and ensure the quality of irrigation. Cyclone Water Sand separator: such filters are based on the working principle of gravity and centrifugal force to remove solid particles with higher density than water, and need to be cleaned regularly, and the time is determined according to the local water quality. Due to the unstable flow of water at the moment of opening and stopping the pump, the filtration effect will be affected. Generally, it is used as a prima