Sand bed seepage flow sludge plugging simulation apparatus

Abstract

The invention discloses a device for simulating the seepage and siltation of a sand layer, which comprises an upstream water storage tank, a water level control tank, an air-mixed water tank, a control water pump, a withdrawal water pump, a stirrer, an air bubble generator, a downstream water storage tank, digital cameras and a computer. The water level control tank is provided with the stirrer; the air-mixed water tank is provide with the air bubble generator; a water inlet and a water outlet of the inside of an experiment tank body are provided with a first filtering net and a second filtering net; a porous medium for experiment can be filled between the first filtering net and the second filtering net; the computer is connected with the digital cameras; and the first digital camera and the second digital camera are placed at two sides of the experiment tank body respectively. The experiment tank body is provided with a pressure measuring and sampling valve for measuring water pressure and sampling an aqueous solution and a porous medium sample. The device adopts two water pumps, can drive the water current to pass through the testing porous medium in the positive direction and the reverse direction, simulate the cleaning process of the reinjecting and lifting of well water and is favorable for researching the problems of the seepage and siltation of particles and air bubbles in a heat pump system of an underground water source.

Description

technical field [0001] The invention relates to the technical field of groundwater seepage observation, and more particularly to a sand layer seepage silting simulation device, which is suitable for studying the observation device of particles and air bubbles in the water-bearing underground sand layer migrating in the sand layer gap and blocking the groundwater seepage phenomenon. Background technique [0002] Ground source heat pump technology is an energy utilization method that collects shallow low-temperature ground energy (the temperature potential energy accumulated in groundwater, soil and sand and gravel), meets the needs of heating and cooling at the same time, and achieves zero pollution emissions. Ground source heat pump not only utilizes the renewable energy of nature, greatly saves the energy consumption of traditional high-grade buildings, but also can truly realize the green living environment of heating and cooling without pollution. It is the most realistic ...

AI Technical Summary

Problems solved by technology

However, such methods and devices estimate the seepage law based on the overall permeability of the filling medium, and are unable to understand the migration and silting process of particles and air bubbles in the pore water-bearing medium of the sand layer, and the impact of changes in water flow channels on the migration of particles and air bubbles. Direct observational research on the impact of silting can not provide enough data for the study of clogging mechanism

The applicant applied for a patent on January 6, 2009 - the method and device for the observation of microbial groundwater seepage blockage (application number 200910060435.4), which is a pore water flow observation method and device for microorganisms, which uses ultraviolet and visible light to control and observe microorganisms in the ground. The propagation, migration and silting process of water flow channels in porous aqueous media, but this method and device cannot simulate the process of hoisting cleaning and recharge in the sand layer of the water source heat pump system, nor can it simulate solid particles, such as soil fine sand, and air bubble doping Migration and silting in pore water

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