A method for regulating backwater in a phosphogypsum reservoir

Abstract

The invention discloses an ardealite storehouse water return adjustment method. A first layer of plastic leakage discharge blind pipes (6) is arranged at the bottom of an ardealite fill dam (2) and the upper part of an impermeable layer toward the inside of a storehouse; after the stockpiling height of ardealite exceeds the dam top of an initial-stage dam (1), a layer of plastic leakage dischargeblind pipes (6) is arranged toward the inside of the storehouse when the stockpiling height rises per 8-12 m; the plastic leakage discharge blind pipes (6) are connected with horizontal drainage pipes(7) and extend to a dam slope surface; and a dam slope drainage pipe (8) is arranged on slope surfaces of outer slopes of the initial-stage dam (1) and the ardealite fill dam (2). In the dry season,the flow of a valve mounted at an outlet of the dam slope drainage pipe (8) is adjusted to be large, so that a water level in the ardealite fill dam (2) falls to a low water line (9); and in the rainyseason, the flow of the valve mounted at the outlet of the dam slope drainage pipe (8) is adjusted to be small, so that the water level in the ardealite fill dam gradually rises to a high water line(10). By employing the characteristics of high void ratio and permeability of the ardealite and controlling the seepage discharge, the function of water return adjustment is realized.

Description

technical field [0001] The invention belongs to the technical field of phosphogypsum reservoir engineering, and in particular relates to a method for regulating backwater in wet storage of phosphogypsum reservoirs, which is widely applicable to various types of phosphogypsum reservoirs in various regions, and is especially suitable for building larger regulating return ponds Difficult to dig a large phosphogypsum reservoir with difficulty in excavating flood intercepting ditches in the surrounding area. Background technique [0002] Phosphogypsum is a by-product solid waste in the production process of phosphate fertilizer industry, and 5 tons of phosphogypsum are produced for every 1 ton of phosphoric acid produced. The main component of phosphogypsum is calcium sulfate dihydrate, and its content is as high as 90%. In recent decades, with the rapid economic development, my country's phosphate fertilizer industry has developed greatly, and its production and sales have rank...

AI Technical Summary

Problems solved by technology

However, this backwater system is only suitable for drainage recovery of phosphogypsum slag yards, not suitable for backwater adjustment in wet storage phosphogypsum storage

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