Combined filter and filter combination method

Abstract

The invention provides a combined filter. The combined filter comprises a plurality of filter tanks which are connected in parallel, an empty tank which is internally filled with nitrogen, a drain pipe and a nitrogen source, which are respectively communicated with the filter tanks, wherein the empty tank and the filter tanks are provided with first gas ports and second gas ports, which are respectively communicated with the nitrogen source; each filter tank is provided with a water inlet pipe which can be filled with washing water; the empty tank is communicated with each filter tank througha plurality of transfer pipes; when the filter tanks are cleaned, the filter tanks are filled with nitrogen to ensure that materials in the filter tanks are pressed to the empty tank through the transfer pipe for temporary storage; and after the cleaning is completed, the empty tank is filled with nitrogen to press the materials back into the filter tanks, so that the phenomenon that the materialsare exposed to be oxidized and discarded due to the cleaning of the filter tanks in the prior art.

Description

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AI Technical Summary

Benefits of technology

The present technology allows filters to purify their wastewater without losing any valuable chemicals or requiring complicated processes like re-filling them afterwards. This results in less wasted resources compared to previous methods while maintaining effective filtering capabilities.

Problems solved by technology

This patented technical problem addressed in this patents relates to improving the efficiency and effectiveness of producing poly(hexadecaprola) amide), specifically hexanediamine (HMDA). While current methods involve storing excessive amounts of caprolactarn at high temperatures or reusing them after being exposed to air during storage, there are challenges associated with these processes that can result in wasted materials and increased costs due to frequent maintenance required over many months' use period.

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