Anaerobic online acid washing device

Abstract

The invention discloses an anaerobic online acid washing device. A first valve is arranged at one end, communicating with an anaerobic reactor, of a circulation pump water outlet pipe; a second valveis arranged at one end, communicating with the anaerobic reactor, of an anaerobic water outlet pipe; a third valve is arranged in a position of an input opening of the circulation pump water inlet pipe; the circulation pump water outlet pipe and the anaerobic water outlet pipe are communicated through an acid washing circulation pipe which is installed in advance; the circulation pump water inletpipe is connected with the acid washing water inlet pipe; a fourth valve is arranged on the acid washing circulation pipe; a fifth valve is arranged on the acid washing water inlet pipe. The anaerobiconline acid washing device has the advantages that the cleaning on the pipeline inside scale formation layer by the anaerobic reactor under the condition of not dismounting the pipeline and accessories can be realized; the pipeline flowing passage smoothness is recovered; the scale forming problem of the anaerobic circulation pipeline and the water outlet pipeline can be fast and effectively solved. The equipment overhaul is convenient and fast; the dismounting of the anaerobic reactor connection pipeline is not needed; the anaerobic COD removal efficiency can be stabilized at 90 percent or higher for a long time.

Description

technical field [0001] The invention relates to the technical field of sewage treatment equipment, in particular to an anaerobic on-line pickling device. Background technique [0002] At present, the anaerobic reactors used in domestic waste incineration power plant leachate treatment systems are mostly ascending anaerobic sludge bed reactor (UASB), ascending sludge bed-filter (UBF), UASB, UBF anaerobic reaction The device uses the internal supernatant mixed raw liquid to circulate to the anaerobic sludge layer at the bottom, fully mixes and reacts with the anaerobic sludge at the bottom, and the low-concentration leachate at the top overflows to the next-stage treatment system. [0003] The common feature of UASB and UBF anaerobic reactors is the fixed installation of external circulation pipelines and outlet pipelines. In the initial stage of anaerobic treatment of leachate in the reactor, sufficient circulation flow and good hydraulic mixing effect can make the leachate ...

AI Technical Summary

Problems solved by technology

However, during the long-term operation, the carbonate ions produced by the biochemical reaction inside the anaerobic reactor react with the calcium and magnesium ions in the leachate to form carbonates that are insoluble in water. At the same time, the ammonia nitrogen and phosphorus in the leachate are reacted Struvite (magnesium ammonium phosphate) will also be generated, and these substances will adhere to pipelines and equipment, forming scale

As the anaerobic reactor circulation pipeline, circulation pump, and the scale of the water outlet pipeline become thicker, the pipeline is blocked, the circulation flow is reduced, and the water outlet is large and small, and the leachate and anaerobic sludge are mixed unevenly, resulting in COD. The sharp drop in removal efficiency and large fluctuations in water output will cause the back-end biochemical load to fluctuate accordingly, increasing the difficulty of running the pipeline. If the adjustment is not timely, the data of COD and ammonia nitrogen in the biochemical system will rise sharply, and the processing capacity will decrease accordingly.

Because the pipelines and equipment are fixed installations, it is difficult to disassemble, repair and clean the pipelines and equipment after fouling. It is necessary to disassemble the anaerobic reactor pipeline, clean up the scaling, and reassemble, which is time-consuming, laborious, and long-term Shutdown of the anaerobic reactor, adversely affecting the anaerobic reaction

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