Backwashing device and pit filter

Abstract

The invention relates to a backwashing device and a pit filter. The backwashing device comprises a fluid conveying pipeline and a spraying assembly, the fluid conveying pipeline is used for connecting an external cleaning medium; and the spraying assembly is communicated with the fluid conveying pipeline and is used for spraying a cleaning medium to the pit filter. According to the backwashing device, the spraying assembly is communicated with the fluid conveying pipeline, the cleaning medium is sprayed out, and then the backwashing device can be used for washing the pit filter, so that the situation that the pit filter is blocked by fragments and normal operation of a containment pit filter pump is harmed can be avoided, and the filtering efficiency of the pit filter can be improved. The pit filter comprises a filter body and the backwashing device, the backwashing device is arranged on the filter body, due to the fact that the pit filter is provided with the backwashing device, blockage caused by fragments can be avoided, and the pit filter has the advantages of being high in filtering efficiency and good in filtering effect.

Description

technical field [0001] The invention relates to the field of nuclear power engineering, and more specifically relates to a backwashing device and a pit filter. Background technique [0002] In the related art, the backwashing device used for the pit filter usually uses the backwash pipeline to connect the high-level water pool in the containment with the pit filter component, and uses the power generated by the height difference between the IVR pool and the pit filter component to flow to the ground. The pit filter component injects a certain flow of water to peel off the debris covering the surface of the pit filter component, prevent the pit filter component from clogging, reduce the pressure loss of the pit filter component, and ensure the normal operation of the safety injection pump. The backwashing device in the related art is prone to the following problems: [0003] 1. With the continuous accumulation of debris, the containment pit filter is blocked, and the pressur...

AI Technical Summary

Problems solved by technology

[0003] 1. With the continuous accumulation of debris, the containment pit filter is blocked, and the pressure loss of the containment pit filter gradually increases. When it reaches a certain value, it will cause the pump cavitation allowance of the pit filter component to take water Insufficient, which in turn jeopardizes the normal operation of the containment sump filter pump

[0004] 2. The kinetic energy generated by the water in the IVR pool passing through the height difference with the pit filter components is limited by the layout space, so it cannot generate a large pressure. When there are too many debris, the backlog of debris cannot be washed away, and the backwashing effect cannot be performed.

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