A water treatment pilot test filter column

Abstract

A filter column for a water treatment pilot scale test comprises a filter column body. A water inlet pipe is arranged at the top end of the filter column body, a plurality of evenly distributed sampling pipes and a plurality of evenly distributed pressure measuring pipes are arranged on the outer wall of the filter column body, and a perforated bearing water distribution plate is arranged at the bottom of the filter column body. A back washing water inlet pipe and a back washing air pipe are arranged in the bearing water distribution plate, and a back washing drainage pipe is arranged on the side wall of the filter column body. A support is arranged at the lower end of the bearing water distribution plate, and a filtered water outlet pipe is arranged in the support. The filter column is characterized in that a water blocking film is arranged on the portion, between the top end of the filter column body and the bearing water distribution plate, of the inner wall of the filter column body, filler is arranged between the water blocking film and the inner wall of the filter column body, and the upper end of the water blocking film is connected with a gel addition device. According to the filter column, influences of the boundary effect on the filtration test can be effectively eliminated, accurate sampling along the filter column can be achieved, turbid matter adhesion occurring after washing can be eliminated, various adverse influences on the test can be reduced to the minimum, and the accuracy of the test can be improved.

Description

technical field [0001] The utility model relates to the field of water treatment, in particular to a water treatment pilot test filter column. Background technique [0002] At present, the simulation of the water purification plant process mainly adopts the similarity principle to scale the actual structure to meet the geometric similarity, motion similarity and dynamic similarity. The filter is an important structural unit in the water purification process. The simulation of the filter usually uses a model filter column for pilot test, that is, according to the experimental requirements, the model filter column is made, and it is equipped with a filtration system and a backwash system. Related experiments such as process parameter optimization were carried out on the filter tank. The existing filter columns are mostly made of plexiglass, and the water inlet pipe is set above the filter column, and the water is pumped into the filter column through the water pump. At the s...

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Problems solved by technology

[0003] Filtration experiments using model filter columns can basically satisfy the simulation of actual filter tanks, but there are usually some problems during the experiment, including the following aspects: the inner surface of the filter column is smooth, the filter material and the side wall after filling the filter material The gap is larger than the gap between the filter material and the filter material. During the filtration process, the flow rate of water along the side wall is greater than the filtration rate of water between the filter materials, resulting in a side wall effect. The turbidity or sampling port structure is relatively simple, which is not conducive to obtaining more accurate experimental data; after backwashing, the turbidity adheres to the inner surface of the filter column, and the cleaning is not thorough, which affects the filtration process

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