An ecological protection method suitable for phosphogypsum storage yard

Abstract

The invention provides an ecological protection structure and an ecological protection method suitable for an ardealite storage yard. The structure of a modularization unit is that a flexible adhesion layer, an HDPE (high-density polyethylene) film with a certain specification, a plant fiber blanket with a certain specification, a vegetation inner net with a certain specification, a vegetation matrix layer with a certain specification, a vegetation outer net with a certain specification and a germplasm matrix layer with a certain specification are sequentially paved from inside to outside on the slope face of the shaped ardealite stack body; the edges of the vegetation inner net and the vegetation outer net are bound by binding wires and fixed by ground anchors; plants are planted in the germplasm matrix layer; along with the growth, the root systems of the plants penetrate through the vegetation outer net step by step to stretch to the vegetation matrix layer, the vegetation inner net and the plant fiber blanket, and the root systems mutually intersect with the vegetation matrix layer, the vegetation inner net and the plant fiber blanket to form the flexible blanket-shaped ecological protection structure composed of the plant root systems, the matrix, the double-layered nets and the HDPE film; the protection structure can be paved, spliced and planted in a modularization way; when the stack body is dug and ardealite is utilized, the protection structure can be moved along with the plants in the modularization way, the environment-friendly and safe problems of the whole storage yard can be ensured, and the front end sustaining discharge and the rear end sustaining excavation and utilization are not influenced.

Description

technical field [0001] The invention relates to an ecological protection structure and method for a phosphogypsum storage yard, in particular to a construction structure and method for ecological protection of an in-use or abandoned phosphogypsum storage yard. Background technique [0002] In the production process of phosphorus chemical industry, an intermediate product-phosphogypsum will be produced, and the amount is particularly large. According to statistics, approximately 5 tons of phosphogypsum are produced for every 1 ton of phosphoric acid produced. Phosphogypsum is a bulk low-toxic industrial solid waste between hazardous solid waste and general industrial solid waste, and its disposal is one of the fundamental problems restricting the long-term healthy development of the phosphorus chemical industry. [0003] For phosphogypsum, we need to have two perspectives: [0004] First: Phosphogypsum is first of all a resource, such as using phosphogypsum to prepare build...

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Problems solved by technology

[0005] Second: Phosphogypsum storage and improper handling will become a source of pollution and cause serious environmental problems

[0010] (3) The particle size of phosphogypsum waste residue is very fine, with an average particle size of 10.22 μm. It is easy to generate dust in dry conditions, and improper storage will cause air pollution;

[0011] (4) Phosphogypsum leachate is acidic wastewater containing soluble phosphorus, fluoride, etc. Improper treatment will cause eutrophication of groundwater, surface water and lakes.

[0012] Almost all the phosphogypsum storage yards in use or abandoned in my country have the following problems: (1) The site selection of the storage yard is improper, near the river or upstream of the residential area; (2) There is no anti-seepage treatment facility or the design is not perfect; (3) ) The lack of effective security and stabilization measures leads to instability of the pile and potential safety hazards; (4) The restoration of the ecological landscape of the phosphogypsum storage yard has not been realized, and the land occupied by the storage of phosphogypsum has not been reused

[0015] Therefore, the present invention provides a construction structure and method that can be modularly paved and planted during the ecological restoration and protection of the phosphogypsum pile slope, and can be modularly moved together with the vegetation when the phosphogypsum is used in the excavated pile. It can solve various deficiencies of existing treatment technologies, and has broad prospects for promotion and application

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