Filter media loss-free continuous drift sand filter

Abstract

The invention provides a filter media loss-free continuous drift sand filter, which comprises an air lift pump and a sand washer, and is characterized in that the upper end of the air lift pump is provided with a reflection sand control cover; the reflection sand control cover is fixedly connected with the sand washer. Further, the upper end of the reflection sand control cover is closed, and the lower end of the reflection sand control cover is open; the reflection sand control cover consists of a reflection sand control cover inner barrel and a reflection sand control cover jacket; the reflection sand control cover inner barrel is arranged in the reflection sand control cover jacket; the diameter of the reflection sand control cover jacket is greater than that of the reflection sand control cover inner barrel; the side wall of the reflection sand control cover inner barrel is provided with air vents; and the reflection sand control cover jacket covers the air vents. The filter media loss-free continuous drift sand filter provided by the invention has the beneficial effects that the reflection direction of filter media drift sand discharged along with gas is changed through the reflection sand control cover, so that filter media cannot run off any longer along with the discharged gas, the quartz sand filter media can be recycled for a long term, and thereby, the environmental pollution is reduced while natural resources are saved. Meanwhile, the quality of filtered water can be better ensured to be good and stable by the quartz sand filter media with constant thickness.

Description

Technical field [0001] The invention belongs to the technical field of sewage treatment equipment, and in particular relates to a continuous quicksand filter with no filter loss by changing the reflection direction of the quicksand. Background technique [0002] Continuous flow sand filter, referred to as sand filter equipment, is an important sewage treatment equipment for the advanced sewage treatment of urban sewage treatment plants to reach the national level A discharge standard. The sand filter equipment is filled with quartz sand to filter sewage, and quartz sand is also referred to as filter material. The sand filter equipment is based on the principle of air lift to circulate the filter material. The air lift pushes the dirty sand and water mixture at the bottom of the sand tank up to the upper end of the air lift pump through the central pipe, and the gas passes through the steady flow hood set at the upper end of the air lift pump. The vent is exhausted. At present, ...

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem of loss of filter material and substandard water quality of filtered water caused by defects and deficiencies in the design principles of existing sand filter equipment in this field, the present invention provides a continuous flow sand filter without filter material loss. The reflective sand control cover is designed to change the reflection direction of the filter quicksand discharged with the gas, so as to achieve no loss of filter material, save natural resources, reduce pollution, and ensure excellent quality of filtered water

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