Film laying anti-seepage salt pan and building method thereof

Abstract

The invention discloses a film laying anti-seepage salt pan and a building method thereof. The salt pan is defined by a salt pan bottom face and side slopes in a surrounding manner; a NaCl pond plate is arranged on the salt pan bottom face; a halogen guiding trench is excavated in the salt pan bottom face; exhaust pipes are laid on each single parcel of salt pan bottom face and the salt pan side slopes; a salt pan bottom face film is laid tightly attached to the salt pan bottom face and the halogen guiding trench; salt pan side slope films are laid on the salt pan side slopes, the films are welded to one another; a segment of fold exists at the positions, close to the salt pan bottom face, of the salt pan side slope films; and anchoring trenches are formed below the top edge positions of the salt pan side slopes. The building method includes pond plate sun-curing, halogen discharging, leveling, rolling and pressing, exhaust pipeline laying, film laying and welding, side slope film anchoring, halogen guiding, exhausting and other steps. The film laying anti-seepage salt pan is good in anti-seepage performance, the brine seepage and leakage amount can be reduced by 60-90%, the using period is long, the exhausting performance is good, and the comprehensive cost is low; and the method is easy to construct, wide in applicability, short in work period and low in cost.

Description

technical field [0001] The invention relates to an anti-seepage salt field and a construction method thereof, in particular to a membrane-laid anti-seepage salt field and a construction method thereof. Background technique [0002] In the production of salt fields, brine seepage in salt fields is an important index to evaluate the quality of salt fields. The loss of brine resources caused by the seepage of salt pans is a technical problem encountered by many sodium salt and potassium salt production units. According to actual production experience, the seepage rate of Qinghai Salt Lake Salt Fields and Xinjiang Salt Lake Salt Fields in my country is about 0.5-0.8mm / d, and the loss of potassium resources caused by seepage reaches 20-50%, while the brine leaked from salt fields is infiltrating into the ground After being dispersed and absorbed, it is difficult to mine and recover again. Therefore, seepage in salt fields not only causes a substantial increase in the cost of res...

AI Technical Summary

Problems solved by technology

This method has the advantages of low cost and simple construction, but its disadvantages are: on the one hand, the clay still has a certain porosity after compaction, which cannot prevent leakage to the greatest extent; on the other hand, restricted by geological conditions, only some areas Clay with good impermeability exists

[0005] Another effective anti-seepage method is plastic film bottom anti-seepage, that is, a layer of plastic film is laid on the soil at the bottom of the salt pan or on the surface to form a barrier layer to prevent brine from seepage. The material of the film used is PVC canvas or PE plastic film , the construction of plastic film bottom laying is simple, and the anti-seepage effect is ideal. Due to its wide adaptability, it is a technology that can be adopted on a large scale in Yantian anti-seepage, but there are still the following problems: (1) Canvas and ordinary PE film are easy to age, and the service life is short. The price is high, especially the membrane laid on the slope of the salt field, and some even have a production cycle (8 months to 1 year) that is seriously damaged under the combined action of brine pressure and strong wind; (2) Compared with the clay floor, The impermeability of the membrane will cause a large number of bulges at the bottom of the salt pan after water ingress, which will seriously affect the subsequent production of the salt pan

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