Gas-water backwashing rapid filter tank based on modification of siphon filter tank

Abstract

The invention relates to a gas-water backwashing rapid filter tank based on modification of a siphon filter tank. A pneumatic pull plate valve is used and an air impact system is additionally arranged; a siphon filter tank only having a water flushing mode is modified into a gas-water combined backwashing efficient intensive filter tank. The filter tank comprises a water inlet pull plate valve arranged in a water distribution channel, a water outlet / water flushing pull plate valve arranged on a transverse partition plate of a clear water channel, a drainage pull plate valve arranged on the outer side tank wall of the filter tank, and an overflow pull plate valve arranged on an overflow weir wall at the tail end of the clear water channel of the filter tank, a flushing water head is formedthrough coordination and cooperation between the pneumatic pull plate valves to perform filter tank water flushing operation without a back flushing pump, so that process equipment is simplified. Herein, by adding the air flushing system, air-water combined backwashing of the filter is realized, and the operation efficiency of the traditional siphon filter is improved, the operation effect of thefilter tank can be remarkably improved, the operation period of the filter tank is prolonged, the operation cost is reduced, and certain popularization and reference values are achieved for siphon filter tank transformation of medium and small water plants.

Description

technical field [0001] The invention belongs to the technical field of water supply treatment, in particular to an air-water backwashing fast filter based on the transformation of a siphon filter. Background technique [0002] The siphon filter is the mainstream water supply filtration process unit in the 1990s. With the continuous development of social economy, the actual operating load of the siphon filter in the water supply plant is much higher than the original design load, and the original single water backwash of the siphon filter The method no longer meets the high-efficiency regeneration requirements of the filter material in the filter, which leads to the phenomenon of filter material hardening, poor filter regeneration ability, and short operation cycle, which eventually leads to problems such as low filter operation efficiency and poor effluent quality. In view of the above problems, it is necessary to upgrade the traditional siphon filter to meet the demand of u...

AI Technical Summary

Problems solved by technology

Although these transformations have achieved certain results, there are still some problems. The former directly adds the air flushing system, which does not solve the problem of low efficiency in the process of water inflow, water outflow and drainage in the siphon system, especially the phenomenon of sand running out during the drainage process of the filter; The latter V-shaped filter has a large amount of drainage tanks occupying the actual filtration area of ​​the filter, which limits the production capacity of the filter, and the water demand for backwashing is relatively large, accounting for 2.6% of the water production, which increases the production and operation costs

In addition, the structure of the V-shaped filter is complex, and the upgrading cycle is long, which is difficult to popularize and transform for water plants with high water supply pressure; the valve structure of the flap filter is complex, the frequency of mechanical operation is high, and the operation and maintenance of equipment is difficult , it is not universally applicable to small and medium-sized water plants in cities and towns

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