A mechanism for preventing the migration of underground aquifer heat storage medium

Abstract

The application discloses a mechanism for preventing underground aquifer heat storage medium migration, and relates to the technical field of agricultural facility heating, comprising a heat well and a plurality of stability wells arranged around the heat well in a circumferential direction, the adjacent stability wells are connected through water pipes, the water pipes are filled with water and the air is discharged, the water level in the stability well is higher than that in the high water level area after water injection, and the water outlet at the lower end of the water pipe is always below the ground water level line. The application can reduce heat loss caused by underground water flow of the underground aquifer cross-season heat storage mechanism, and improve the heat storage effect.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of agricultural facility heating, in particular to a mechanism for preventing the migration of a heat storage medium in an underground aquifer. BACKGROUND

[0002] Temperature is the basis for the growth and development of plants. In most areas of China, the spring and winter seasons are characterized by low temperatures, heavy rainfall and weak light, which seriously affect the yield and quality of facility agricultural production. Facility agricultural production enterprises usually use fuels such as diesel and biomass pellets, or electrically driven air / ground source heat pumps to heat the environment in the greenhouse as a whole. This heating method has the problems of large fuel / electricity consumption, large harmful gas emission and high heating cost. Therefore, the clean and efficient transformation of agricultural heating energy has been highly concerned by the Chinese government.

[0003] Clean and inexpensive solar radiation is spatially and temporally mismatched with agricultural production. Underground cross-seasonal heat storage technology stores the excess heat in summer and autumn in the ground and extracts it in spring and winter for greenhouse heating, effectively solving the mismatch of renewable energy heating in time and space. Underground cross-seasonal heat storage systems are usually divided into underground water tank heat storage, soil (buried pipe) heat storage and aquifer heat storage according to the different heat storage media. Among them, the underground water tank heat storage has the highest storage efficiency, but the construction engineering quantity of the underground water tank is large and the cost is high; the construction engineering quantity of the soil heat storage is relatively small, but the heat storage efficiency is low, and the heat loss rate is high due to the influence of surface water infiltration; the heat well construction engineering quantity of the aquifer heat storage is the smallest, and the heat storage capacity is huge, but the stability requirement of the underground aquifer is high, and the heat loss is large in the land with high fluidity of the aquifer. Therefore, the underground aquifer heat storage system cannot be popularized and applied in all areas. SUMMARY

[0004] The purpose of the present application is to provide a mechanism for preventing the migration of a heat storage medium in an underground aquifer, to solve the problems existing in the prior art and to reduce the heat loss caused by the flow of underground water in the underground aquifer cross-seasonal heat storage mechanism and improve the heat storage effect.

[0005] To achieve the above-mentioned purpose, the present application provides the following solutions:

[0006] The present application provides a mechanism for preventing the migration of a heat storage medium in an underground aquifer, comprising a heat well and a plurality of stability wells arranged circumferentially around the heat well, the adjacent stability wells are connected by a water pipe, the water pipe is filled with water and the air is exhausted, the water level in the stability well after being filled with water is higher than the water level in the high water level area, and the water outlet at the lower end of the water pipe is always below the ground water level.

[0007] Preferably, the distance between each stability well and the heat well is the same.

[0008] Preferably, the distance between adjacent said stability wells is the same.

[0009] Preferably, the distance between said stability well and said hot well is equal to the distance between adjacent said stability wells.

[0010] Preferably, further comprising a heat collector, a circulating water pipe and a greenhouse facility, said circulating water pipe comprising a water outlet main pipe, a water inlet main pipe and two branch pipes, one end of said water outlet main pipe extending into said hot well, the other end of said water outlet main pipe communicating with one end of the two said branch pipes, water in one said branch pipe flowing through said heat collector, water in the other said branch pipe flowing through said greenhouse facility, the ends of the two said branch pipes away from said water outlet main pipe both communicating with one end of said water inlet main pipe, the other end of said water inlet main pipe extending into said hot well, the ends of said water inlet main pipe and said water outlet main pipe both being below the water level in said hot well.

[0011] The present application has the following technical effects relative to the prior art:

[0012] The stability well mechanism for preventing migration of heat storage medium in underground aquifer provided by the present application comprises a hot well and a plurality of stability wells arranged circumferentially around the hot well, adjacent stability wells are connected by a water pipe, the water pipe is filled with water and air is discharged, the stability well and the water pipe are used to form a communicating vessel mechanism in a terrain with high and low differences, the water level in the stability well is higher than the water level in the high water level area after water is injected into the stability well, the water outlet at the lower end of the water pipe is always below the terrain water level line, after a period of time, the water level in the area surrounded by the stability well reaches the same level as the high water level area, the water level difference disappears, and the groundwater in the area surrounded by the stability well will not migrate horizontally; at the same time, the water in the high water level area continues to infiltrate into the stability well in the high water level area and is directly transported to the stability well in the low water level area through the water pipe, and then infiltrates into the low water level area, thereby further ensuring that the groundwater in the area surrounded by the stability well will not migrate horizontally, reducing heat loss of the underground aquifer cross-season heat storage mechanism caused by groundwater flow, and improving the heat storage effect. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0014] Figure 1 is a structural schematic diagram of the stability well mechanism for preventing migration of heat storage medium in underground aquifer provided by the present application (initial state);

[0015] Figure 2This is a schematic diagram of the structure (thermal storage state) of the stabilization well mechanism for preventing the migration of underground aquifer thermal storage medium provided by the present invention;

[0016] Figure 3 This is a schematic diagram of the arrangement of the stabilization well and water pipe in this invention;

[0017] In the diagram: 100 - a stabilization well structure to prevent the migration of underground aquifer thermal storage medium; 1 - a hot well; 2 - a stabilization well; 3 - a water pipe; 4 - a high water level zone; 5 - a low water level zone; 6 - a thermal storage zone; 7 - a circulating water pipe; 8 - a solar collector; 9 - a greenhouse facility. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] The purpose of this invention is to provide a stabilization well mechanism to prevent the migration of underground aquifer thermal storage medium, so as to solve the technical problem that existing underground aquifer cross-seasonal thermal storage mechanisms are prone to heat loss due to groundwater flow and have poor thermal storage effect.

[0020] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0021] like Figures 1-3 As shown, this embodiment provides a stabilization well mechanism 100 to prevent the migration of underground aquifer thermal storage medium. It includes a hot well 1 and multiple stabilization wells 2 arranged circumferentially around the hot well 1. Adjacent stabilization wells 2 are connected by water pipes 3, which are filled with water and vented of air. The cooperation between the stabilization wells 2 and the water pipes 3 forms a communicating vessel mechanism in terrains with varying elevations. After water is injected into the stabilization wells 2, the water level is higher than the water level in the high-water-level zone 4. The outlet at the lower end of the water pipes 3 is always below the terrain water level line (e.g., ...). Figure 1 As shown in the diagram (arrows indicate the direction of seepage), after a period of time, the water level in the area surrounded by stabilization well 2 reaches the same level as the high water level area 4, the water level difference disappears, and the groundwater in the area surrounded by stabilization well 2 will therefore not migrate horizontally; at the same time, the water in the high water level area 4 continues to seep into the stabilization well 2 in the high water level area 4, and will be directly transported to the stabilization well 2 in the low water level area 5 through water pipe 3, and then seep into the low water level area 5 (e.g., Figure 2As shown, the arrows in the figure are the water infiltration direction, thereby further ensuring that the groundwater in the area surrounded by the stability well 2 cannot horizontally move, forming the heat storage area 6, reducing the heat loss of the cross-seasonal heat storage mechanism of the underground aquifer due to groundwater flow, and improving the heat storage effect.

[0022] Specifically, the distance between each stability well 2 and the heat well 1 is the same. The distance between adjacent stability wells 2 is the same. The distance between the stability well 2 and the heat well 1 is equal to the distance between adjacent stability wells 2. Further, the heat in the heat well 1 can be evenly spread to the surrounding aquifer, improving the effect of heat storage of the aquifer.

[0023] The stability well mechanism 100 for preventing the migration of the heat storage medium of the underground aquifer provided in the embodiment further comprises a heat collector 8, a circulating water pipe 7, and a greenhouse facility 9. The circulating water pipe 7 comprises a water outlet main pipe, a water inlet main pipe, and two branch pipes. One end of the water outlet main pipe extends into the heat well. The other end of the water outlet main pipe is in communication with one end of the two branch pipes. The water in one branch pipe flows through the heat collector 8, and the water in the other branch pipe flows through the greenhouse facility 9. The other ends of the two branch pipes, which are away from the water outlet main pipe, are in communication with one end of the water inlet main pipe. The other end of the water inlet main pipe extends into the heat well. That is, after the water in the heat well enters the circulating water pipe 7, it is divided into the heat collector 8 and the greenhouse facility 9, and then flows into the heat well again. One end of the water inlet main pipe and one end of the water outlet main pipe are both below the water level in the heat well, so as to facilitate water circulation. In actual use, the heat collector 8 exchanges solar heat energy with the heat well through the circulating water pipe 7 and stores it in the underground aquifer. The circulating water pipe 7 extracts heat from the underground aquifer and the heat well and releases it into the greenhouse facility 9 for use.

[0024] Compared with the heating methods such as burning diesel and biomass particles, the stability well mechanism 100 for preventing the migration of the heat storage medium of the underground aquifer provided in the embodiment utilizes the clean and cheap solar radiation heat energy stored in summer and autumn to provide heat for the greenhouse in spring and winter, which can realize low-cost, zero-emission, and pollution-free heating in spring and winter facility agriculture production. Compared with the underground water tank heat storage, soil (buried pipe) heat storage, and conventional aquifer heat storage, the stability well mechanism 100 does not need to build large and high-cost underground heat storage containers / media, which makes the construction of the project more simple. The stability well mechanism 100 is not affected by the migration of the underground water of the aquifer, has low heat loss rate, and has higher heat storage efficiency.

[0025] The principles and implementation manners of the present application are described in the specific examples in the specification. The above examples are only used to help understand the method of the present application and its core idea. Meanwhile, for those skilled in the art, the specific implementation manners and application ranges can be changed according to the idea of the present application. In summary, the content of the specification should not be understood as a limitation of the present application.

Claims

1. A containment well mechanism for preventing the migration of a geothermal medium from an underground aquifer, characterized by: The heat well and the plurality of stability wells are arranged circumferentially around the heat well, the water pipes are communicated between adjacent stability wells, the water pipes are filled with water and emptied of air, the water level in the stability wells is higher than the water level in the high water level area, and the water outlet at the lower end of the water pipe is always below the water level line of the underground water.

2. The containment well mechanism for preventing the migration of a geothermal medium from an underground aquifer according to claim 1, wherein: The distance between each stability well and the heat well is the same.

3. The containment well mechanism for preventing the migration of a geothermal medium from an underground aquifer according to claim 2, wherein: The distance between adjacent stability wells is the same.

4. The containment well mechanism for preventing the migration of a geothermal medium from an underground aquifer according to claim 3, wherein: The distance between the stability well and the heat well is equal to the distance between adjacent stability wells.

5. The containment well mechanism for preventing the migration of a geothermal medium from an underground aquifer according to claim 1, wherein: The system further comprises a heat collector, a circulating water pipe, and a greenhouse facility, the circulating water pipe comprises a water outlet main pipe, a water inlet main pipe, and two branch pipes, one end of the water outlet main pipe extends into the heat well, the other end of the water outlet main pipe is communicated with one end of the two branch pipes, the water in one branch pipe flows through the heat collector, the water in the other branch pipe flows through the greenhouse facility, the other ends of the two branch pipes away from the water outlet main pipe are communicated with one end of the water inlet main pipe, the other end of the water inlet main pipe extends into the heat well, and one end of the water inlet main pipe and one end of the water outlet main pipe are both below the water level line in the heat well.

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