Groundwater recharge method

Abstract

The present invention discloses a groundwater recirculation method for water source heat pump energy-saving air-conditioning cooling water system, and the pumped groundwater can be fully recirculated to an underground same water bearing bed. The present invention is characterized in that measurements of a recirculation well arranged in influence scope of precipitation of a pumping well, smoothed recirculation channel by the enhanced granular diameter of filling granules 4 provided between pipelines and a well hole, and secondary well cleanout dredging of the recirculation channel are adopted. Cooling water entries into a filtering layer by gaps of filtering pipes, and then smoothly entries into the underground water bearing bed, the problems of the easy taken out of the water and difficult recirculation ordinarily existed in the existing underground water source air heat pump air-conditioning system are thoroughly resolved. Meanwhile, the present invention has the characteristic of easy construction, and can be widely used for the underground water source heat pump energy-saving air-conditioning system currently vigorously promoted by the State and is suitable for the tailings clamped with a gravel layer of water bearing bed of the groundwater heat exchanging system of the ground source heat pump or the deep hole of large diameter with a depth within 100 m and the gravel layer.

Description

technical field [0001] The invention relates to a process method for using an air-conditioning cooling water system, in particular to a groundwater recharge method used in a water-source heat pump energy-saving air-conditioning cooling water system. Background technique [0002] Groundwater heat pump system, also known as deep well recharge water source heat pump system. The system pumps out groundwater by building a group of pumping wells, and sends it to the water source heat pump unit through secondary heat exchange or directly to the water source heat pump unit. After extracting heat or releasing heat, it is refilled underground by the recharge well group. Water source heat pump is a high-efficiency energy-saving air-conditioning system that uses the earth's surface or shallow water sources (such as groundwater, rivers and lakes, etc.), or artificially regenerated water sources (industrial wastewater, geothermal tail water, etc.) for both heating and cooling. Water sour...

AI Technical Summary

Problems solved by technology

[0003] Although the groundwater source heat pump air-conditioning system has the highest efficiency among all the current energy-saving air-conditioning systems, the groundwater has a certain pressure, which is affected by the resistance of the permeable layer and the minerals and microorganisms contained in the groundwater, so it is easy to extract and slow to recharge, which may even cause The phenomenon that the recharge cannot go on, causing a large amount of groundwater to be drawn and wasted

Theoretically, the pumped groundwater will all be recharged to the same underground aquifer. At present, the domestic and foreign groundwater recharge technology is not yet mature. Under many geological conditions, the recharge rate is much lower than the pumping speed. After the heat exchanger, it is difficult to meet the requirement of all the recharge to the same underground aquifer as required by the code, so it will cause a large loss of groundwater, which will inevitably lead to the depletion of groundwater resources over time, and land subsidence to varying degrees

The main reason is that the construction technology of the reinjection well is the same as that of the water intake well, the length of the filter pipe of the reinjection well and the water intake well is the same, the particle size of the filter material filled in the reinjection well and the water intake well is the same, and the The well flushing method is the same, the layout and quantity of reinjection wells are unreasonable, and the well flushing is not thorough, etc.

Images