Self-purifying water-filtering sieve well casing with swirling jet port applicable to middle and deep geothermal energy

Abstract

The invention relates to a self-purifying water-filtering sieve well casing with a swirling jet port applicable to middle and deep geothermal energy. The technical problem of poor plug-removing effectof existing sieve well casings is solved. The self-purifying water-filtering sieve well casing includes a water pumping and refilling pipe body, a plurality of sieve meshes, a cylindrical filter screen, an annular water passage and a connecting and fixing structure, the cylindrical filter screen is provided with a plurality of water barriers and water passing areas in the circumferential direction, and the water barriers and the water passing areas are arranged alternately; one side of the annular water passage communicates with the sieve meshes on the water pumping and refilling pipe body; the sides, close to the water barriers, of the water passing areas are provided with oblique water flow guide structures; and the other sides of the water passing areas are provided with radial water flow guide structures. The self-purifying water-filtering sieve well casing has the advantage that the outer wall of the cylindrical filter screen, the inner wall of a rock and soil well and the annular space formed by the outer wall of the cylindrical filter screen and the inner wall of the rock and soil well can be self-cleaned under the mixed impact of radial water flow and oblique water flow. The effects that blockage in a recharge well can be cleaned and refreshed through pressurized water, and the filter water function is restored are achieved, so that the well casing can achieve the self-cleaning function.

Description

technical field [0001] The invention belongs to the technical field of key equipment for collecting and recharging geothermal water in medium-deep underground rock-soil aquifers, and in particular relates to a self-cleaning water filter mesh well pipe with a swirl injection port suitable for medium-deep geothermal heat. Background technique [0002] Geothermal energy is the thermal energy stored in the interior of the earth. It is a clean, low-carbon, widely distributed, resource-rich, safe and high-quality renewable energy. It is usually divided into shallow geothermal energy, mid-deep hydrothermal geothermal energy, and deep dry hot rock. type geothermal energy. Medium-deep geothermal energy mainly refers to the thermal energy resources contained in the strata within the range of 200 meters to 3000 meters underground. The medium-deep geothermal energy is mainly developed by hydrothermal type. Slow compensation and slow regeneration speed lead to the decline of geothermal ...

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Problems solved by technology

[0005] The above solution achieves the purpose of desilting and well flushing by connecting the high-pressure water pump with the injection hole on the injection pipe, but this solution still has the following problems: inconvenient operation, the need for external equipment, high cost, and poor declogging effect

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