Crystallizing-dephosphorizing reactor

Abstract

The invention discloses a crystallizing-dephosphorizing reactor. A water distribution zone, a reaction zone and a sedimentation zone are arranged from bottom to top on a crystallizing-dephosphorizing reactor body, wherein the water distribution zone is provided with a slag discharge pipe, a water inlet pipe, an up-flow column disk type distributor and an aeration device which is formed by the combination of an aeration pipe and an aeration head, the lower part of the reaction zone is provided with a carrier inlet and a drug inlet pipe, the upper part and the lower part at the middle of the reaction zone are provided with a first back flow pipe and a second back flow pipe, the sedimentation zone is provide with a water outlet weir, a water outlet pipe and a discharging opening, the upper part of the water outlet weir is provided with a saw-toothed overflow weir, the lateral side of the water outlet weir is provided with two parallel baffles, and the bottom of the water outlet weir is provided with an inclined board. The crystallizing-dephosphorizing reactor has clear functions; the water distribution zone is provided with the up-flow column disk type distributor which can effectively prevent short-circuiting of fluid; the reaction zone is provided with a carrier which can enhance calcium phosphate salt crystallization; the crystallizing-dephosphorizing reactor adopts a running method of 'continuous feed-intermittent aeration' to prevent the carrier from blocking, and facilitates desorption and recovery of crystals on the carrier; the sedimentation zone is provided with the saw-toothed baffles and the water outlet weir, the water flows out evenly, and the solid-liquid separation is good by providing the inclined board.

Description

technical field [0001] The invention relates to a reactor, in particular to a crystallization phosphorus removal reactor. Background technique [0002] The water pollution problem in my country is very serious. Among the major lakes, the eutrophic lakes caused by nitrogen and phosphorus pollution account for more than 50%, and the annual economic losses caused by "water blooms" and "red tides" are as high as more than 10 billion yuan. On the one hand, phosphorus-containing waste water is increasing day by day, causing environmental pollution and ecological damage to be intensified; on the other hand, phosphorus is an important resource, and the proven reserves of phosphorus in the world are only enough for human use for about 100 years. It has become an urgent need for social development to study the phosphorus removal technology of wastewater recycling, eliminate phosphorus pollution in wastewater, and recycle phosphorus resources at the same time. [0003] Chemical precip...

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Problems solved by technology

At present, there are research reports on DHV crystallization reactor (DHVCrystalactor TM Pelletiser), CSIR fluidized bed crystallization column (CSIR Fluiclised bed Crystallization Column) and Kurita Fixed Bed Crystallization Column (Kurita Fixed Bed Crystallization Column) abroad, but there are few related researches in China. to report

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