Preventing clogged sprinkler heads

The main cause of blockage, we should take different measures for water quality treatment of drip irrigation water sources. In a nutshell, drip irrigation water quality treatment methods can be classified into two categories: physical and chemical. Physical treatment is to remove all organic and inorganic substances with a particle size of 1/10~1/7 in the rain system, while chemical treatment is It is to add or concentrate chemical agents to the water to control biological growth and unfavorable chemical sounds, and change the chemical characteristics of irrigation water. Physical treatment and chemical treatment can be carried out separately, simultaneously or in conjunction with each other.

1. Physical treatment of water The methods of physical treatment include clarification, filtration or a combination of the two methods. The task of physical treatment of water is to correctly determine the required filtration stages and select a reasonable filtration form according to the solid impurities contained in the water source and the pore size of the drip irrigation nozzle; the farm tool determines the filter size through the filter flow rate and calculates the head loss. When determining the filter flushing method and flushing interval at the same time

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(1) CLARIFICATION. The role of clarification is to remove larger inorganic floating particles from the water. Reservoirs and ponds have good clarification effects. In drip irrigation belts with river water and canal water as water sources, in many cases, special sedimentation tanks or water collection and storage tanks may be built to slide clean water source. Clarification is also an economical and effective method of primary treatment of water quality, which can greatly reduce the content of water chores. Clarification tanks plus aeration are the way to get out iron and other soluble solids in irrigation water.

(2) Overplay, when the water flow passes through a porous or porous structure and intercepts the object, the floating or cerebral matter in the water is intercepted or trapped in the empty opening, and the size of the solid object in the hole is measured in milliseconds. , A method of separating magazines from mother liquor in this way is called filtration. Filtration treatment is one of the most widely used, economical and effective treatment methods for drip irrigation belt nozzles.

2. Chemical treatment of water The purpose of water treatment is to: reduce the number of floating objects entering the drip irrigation nozzle, control the growth of bacteria in the drip irrigation belt; dissolve sediment or solid particles; maintain a stable and constant filtration effect of irrigation water. Chemical treatment can be carried out alone or simultaneously with physical treatment. The commonly used chemical treatment methods in low-level systems are chlorination treatment, acid treatment and copper sulfate treatment. When chemically treating irrigation water, two problems must be paid attention to. One is to prevent people and animals from drinking chemically treated water. Poisoning, in addition to teaching people not to use drip irrigation water as drinking water, effective measures to eliminate poisoning should be taken when designing ground irrigation belts, but to prevent water source pollution. Special care should be taken not to use chemicals containing chemicals in water treatment. Water backs up to the source.

3. Biological treatment of water

Biological treatment of water quality refers to the use of fish farming in water sources with large water surfaces, such as reservoirs and dams, to help reduce three types of floating objects, namely nutrients, microorganisms and other organic matter. Many studies have shown that in fish, carp, unloading fish, grass carp and other aquatic waters, the number of plankton will be greatly reduced, but the biological chain will not be damaged.