Filter unit for dark pipe for saline-alkali soil

Abstract

The invention discloses a filter unit for a dark pipe for saline-alkali soil. The filter unit comprises a pervious layer, a dressing layer and a water filtering layer, the pervious layer is wrapped with the dressing layer, and the dressing layer is composed of PVC or PE prilling materials with the diameters ranging from 0.5 cm to 0.6 cm; the dressing layer is wrapped with the water filtering layer. According to the technology, the water filtering layer formed by thick sand and straw serves as a main filtering layer, so that large particles and sludge can be effectively blocked; the dressing layer serves as an auxiliary layer so as to further filter water flow flowing through the water filtering layer, and then water enters the dark pipe through the pervious layer, so that small particles can be effectively prevented from entering the dark pipe, and blocking is prevented; the straw and the thick sand are adopted, so that material selection is convenient, and the cost is reduced; the straw rotting speed is low, the effective using time can be guaranteed, supplementing is convenient, and soil can be improved after straw rots.

Description

technical field [0001] The invention relates to a filter device for a dark pipe used in saline-alkali land, which belongs to the field of mechanical equipment. Background technique [0002] Saline-alkali soil refers to the soil that contains soluble salts and has a high salt concentration. This kind of soil environment will directly inhibit or harm the growth of plants. my country's existing saline-alkali soil has a large area and high saline-alkali content, most of which are located in coastal areas or inland arid areas in northwest China, seriously affecting local economic development. At present, the commonly used salt drainage method is the underground pipe drainage method, that is, through the underground pipe network with many micropores buried under the saline-alkali soil layer, the saline water in the soil is introduced into the underground pipe to achieve the effect of salt washing and salt discharge. , the pipeline is easy to silt, the water filter layer should be...

AI Technical Summary

Problems solved by technology

[0003] However, the selection of materials for the water filter layer is inconvenient to maintain, the cost is high, and the filtering effect is not good, which may easily cause blockage of the hidden pipe and increase the maintenance cost

Images