Thermoelectric refrigeration artificial formation freezer

Abstract

The invention relates to a thermoelectric refrigeration artificial formation freezer. The thermoelectric refrigeration artificial formation freezer includes a protecting device, a radiator and a solid-state refrigeration device, wherein the protecting device is arranged outside, the radiator is arranged inside, the solid-state refrigeration device is arranged between the protecting device and theradiator and is a semiconductor refrigeration plate, the semiconductor refrigeration plate is provided with a heat absorption end and a heat releasing end, the heat absorption end attaches to the protecting device, the heat releasing end attaches to the radiator, after electrification, the heat absorption end absorbs formation heat, and the heat releasing end takes away the formation heat throughthe radiator; and the semiconductor refrigeration plate controls a circuit, the magnitude of a current, and direction of the solid-state refrigeration device through a control unit. According to the freezer, electrification is refrigeration, a formation can be directly frozen without constructing a freezing station, the project cost and construction period are greatly reduced, the cost is lowered,and the work efficiency is improved; according to the needs of a project, segmenting freezing, directional freezing and forced unfreezing are realized, the refrigeration cost is saved, and the construction period is shortened; and natural water circulation cooling is adopted, and the risk of leakage to pollute the environment is avoided.

Description

technical field [0001] The invention belongs to the field of underground engineering design, and in particular relates to a thermoelectric refrigeration artificial formation freezer. Background technique [0002] The artificial ground freezing method is to use artificial refrigeration to send low-temperature refrigerant into the water-bearing strata around the excavated body, so that the water in the stratum will be continuously frozen into ice in the temperature field below its freezing point, and the water in the stratum will be frozen. Soil particles are cemented with ice to form an impermeable overall structure, and the overall strength and elastic modulus of this frozen soil structure are much larger than those of non-frozen soil, which will freeze the strata around the excavated body into a closed continuum (frozen earth wall) to resist ground pressure and isolate the connection between groundwater and the excavated body, and then excavation and construction support ca...

AI Technical Summary

Problems solved by technology

[0005] 2. Excessive power required

Freezing projects based on negative temperature brine circulation need to convert electrical energy into mechanical energy, and mechanical energy into thermal energy. The conversion process is complicated and a lot of electrical energy is wasted in the middle.

[0006] 3. Leakage can easily cause pollution

During the freezing process, the freezing tube shrinks due to pre-cooling, forming shrinkage stress inside, and freezing outside, causing extrusion force, so the freezing tube is easy to break, resulting in salt water leakage, which not only affects the progress of the project, but also pollutes the formation

[0007] 4. High construction cost

Since the freezing station unit needs special maintenance, and the construction time is long, it consumes a lot of power.

[0008] Therefore, the existing freezing system engineering construction cost is too high

Images