CN107606819A - Take out and fill well method for arranging and its pumping-injection mode - Google Patents

Abstract

The invention provides a pumping and irrigation well layout method and its pumping and irrigation mode, including a pumping well A, a pumping well B, a pumping well C, a refilling well A, a refilling well B, a refilling well C, a filter, a flow meter, and a water inlet pipe , ball valve, water collector, pumping main pipe, water pump, heat exchanger, recharging main pipe, recharging water pump, water separator, water outlet pipe and target aquifer, the pumping and irrigation well layout method of the present invention and its pumping and irrigation By rationally arranging the distance between pumping and irrigation well groups and arranging the relative positions between well groups, the occurrence of heat breakthrough can be effectively delayed or avoided. At the same time, by adjusting the pumping and irrigation water volume of the pumping and irrigation well, the degree of thermal interaction can be effectively slowed down, thereby improving the working efficiency of the heat pump unit.

Description

Layout Method of Pumping and Irrigation Well and Its Pumping and Irrigation Mode

technical field

The invention relates to the technical field of ground source heat pump systems, in particular to a method for arranging pumping and irrigation wells of an underground water source heat pump system and a pumping and irrigation mode thereof.

Background technique

With the increasing shortage of human resources and the increasingly prominent environmental problems, more and more people are turning their attention to the development and utilization of low-level renewable energy such as groundwater and soil. The groundwater cooling and heat source system replaces boilers or ordinary air conditioners in winter to obtain heat from the soil and groundwater to heat buildings; in summer, it replaces ordinary air conditioners to discharge heat to soil and groundwater to cool buildings. This system has been rapidly popularized and used because of its many advantages such as environmental protection and energy saving. The ground water source heat pump uses groundwater with a relatively stable temperature as the medium, and realizes heat exchange through the water circulation of the extraction well and the recharge well. Its efficiency coefficient COP is 1.5-2.0 times that of the traditional air conditioner, and it is recognized as an energy-saving and environmentally friendly air-conditioning technology. In the past 20 years, groundwater source heat pump technology has gradually developed and matured in Western Europe, and it has been rapidly extended to China in this century.

However, the practical promotion and application of the groundwater source heat pump system still faces a series of problems such as groundwater pollution, heat penetration, underground cold and heat island effect, and the relationship between system economy and aquifer depth. The first step to solve the above problems is to find a suitable geological structure and rationally arrange pumping and irrigation wells. Among them, the completion of detailed hydrogeological surveys, the acquisition of underground aquifer temperature, depth, water quality and water yield data, the location selection of pumping and irrigation wells and the selection of aquifers can be solved.

However, it is more difficult to reasonably arrange the positions between pumping and irrigation wells to avoid the occurrence of thermal penetration between wells. For the different well recharge type ground water source heat pump system, under the action of forced convection caused by the pumping of the pumping well, the recharged water recharged into the aquifer is no longer evenly distributed with the center line of the recharged well as the center of the circle, but has an obvious deviation. The recharge water mass will be elongated along the direction of the new seepage field formed after pumping, and the recharge water mass will be cut and flattened into a pear shape. Considering the heat diffusion effect of recharge water, the "temperature front" of recharge water will move to the vicinity of the pumping well, and then heat penetration will appear.

In order to delay or avoid the occurrence of heat penetration, the distance between the pumping and irrigation wells must be set far enough, and the site range in the actual project is determined, so the relative positions between the pumping and irrigation wells must be arranged to achieve a limited project site range. The layout of pumping and irrigation wells is relatively "compact", and at the same time, select the appropriate well group pumping and irrigation mode to delay and slow down the degree of heat penetration and thermal interaction to the greatest extent. It can be found from the existing groundwater cooling and heat source system development model that recharge is difficult The problem of heat penetration and heat penetration has become the two bottlenecks in the promotion of this technology. On the one hand, further research and improvement on the high-efficiency and long-term operation of each mode are needed; Research to explore a new model for long-term efficient and stable operation.

Contents of the invention

In order to make up for the deficiencies in the prior art, the present invention provides a method for arranging pumping and irrigation wells of an underground water source heat pump system and a pumping and irrigation mode thereof.

The present invention is achieved through the following technical solutions:

The arrangement method of pumping and irrigation wells and their pumping and irrigation modes, including the target aquifer, where pumping well A, pumping well B and pump C are set at one end of the target aquifer, and reinjection well A, reinjection well B and recharge well are set at the other end of the target aquifer. Filling well C, pumping well A, pumping well B, water pump C, reinjection well A, reinjection well B and reinjection well C are all equipped with filters and flow meters from bottom to top.

The pumping and irrigation well arrangement method and the pumping and irrigation mode of the present invention, the water inlet pipes are installed horizontally on the upper ends of the pumping wells A, B and C, and the reinjection wells A, B and C are installed horizontally There is a water outlet pipe, and ball valves are arranged on the water inlet pipe and the water outlet pipe.

In the arrangement method of pumping and irrigation wells and the pumping and irrigation mode of the present invention, the other end of the water inlet pipe is provided with a water collector, and the other end of the water collector is connected with a main pumping pipe, and a pump is installed on the main pumping pipe, and the main pumping pipe The other end is connected to a heat exchanger, and the other end of the heat exchanger is provided with a recharge main pipe, and a recharge water pump is installed on the recharge main pipe. The other end of the recharge main pipe is connected to a water separator, and the other end of the water separator is connected to with the outlet pipe on.

In the pumping and irrigation well arrangement method and the pumping and irrigation mode of the present invention, the pumping well A, the pumping well B and the water pump C are distributed in a triangle.

In the pumping and irrigation well arrangement method and the pumping and irrigation mode of the present invention, the reinjection well A, the reinjection well B and the reinjection well C are distributed in a triangle.

The beneficial effects of the present invention are:

The arrangement method of the pumping and irrigation wells and the pumping and irrigation mode of the present invention can effectively delay or avoid the occurrence of heat penetration by reasonably arranging the distance between the pumping and irrigation well groups and arranging the relative positions between the well groups. At the same time, by adjusting the pumping and irrigation water volume of the pumping and irrigation well, the degree of thermal interaction can be effectively slowed down, thereby improving the working efficiency of the heat pump unit.

Description of drawings

The present invention will be further described below in conjunction with accompanying drawing.

Fig. 1 is a structural schematic diagram of the present invention.

In the figure, 1 pumping well A; 2 pumping well B; 3 pumping well C; 4 refilling well A; 5 refilling well B; 6 refilling well C; 7 filter; 8 flowmeter; 9 water inlet pipe; ; 11 water collector; 12 water main pipe; 13 water pump; 14 heat exchanger; 15 recharge main pipe; 16 recharge pump; 17 water separator;

detailed description

Accompanying drawing is a kind of specific embodiment of the present invention. This embodiment comprises target aquifer 19, and one end of target aquifer 19 is provided with pumping well A1, pumping well B2 and water pump C3, and the other end of target aquifer 19 is provided with recharge well A4, recharge well B5 and recharge well C6, pumping Water well A1, pumping well B2, water pump C3, reinjection well A4, reinjection well B5 and reinjection well C6 are equipped with filters 7 and flowmeters 8 from bottom to top, and the upper ends of pumping well A1, pumping well B2 and pump C3 are horizontal Water inlet pipe 9 is installed, and water outlet pipe 18 is horizontally installed on recharge well A4, recharge well B5 and recharge well C6, and ball valve 10 is all arranged on water inlet pipe 9 and water outlet pipe 18, and the other end of water inlet pipe 9 is provided with collector The water tank 11, the other end of the water collector 11 is connected with a water main pipe 12, the water pump 13 is installed on the water main pipe 12, the other end of the water main pipe 12 is connected with a heat exchanger 14, and the other end of the heat exchanger 14 is provided with The recharge main pipe 15 is installed with a recharge water pump 16, the other end of the recharge main pipe 15 is connected to a water separator 17, and the other end of the water separator 17 is connected to the outlet pipe 18, and the pumping well A1 , the pumping well B2 and the water pump C3 are in a triangular distribution, and the reinjection well A4, the reinjection well B5 and the reinjection well C6 are in a triangular distribution.

The arrangement method of the pumping and irrigation wells and the pumping and irrigation mode of the present invention can effectively delay or avoid the occurrence of heat penetration by reasonably arranging the distance between the pumping and irrigation well groups and arranging the relative positions between the well groups. At the same time, by adjusting the pumping and irrigation water volume of the pumping and irrigation well, the degree of thermal interaction can be effectively slowed down, thereby improving the working efficiency of the heat pump unit.

The specific implementation of the present invention has been described in detail above, but only as an example, the present invention is not limited to the specific implementation cases described above, and equivalent modifications to the present invention are also within the protection scope of the present invention.

Claims (3)

1. Well method for arranging and its pumping-injection mode are filled 1. taking out, including target water-bearing layer（19）, it is characterised in that：Target water-bearing layer（19） One end is provided with pumped well A (1), pumped well B（2）With water pumper C（3）, target water-bearing layer（19）The other end sets inverted well A （4）, inverted well B（5）With inverted well C（6）, pumped well A (1), pumped well B（2）, water pumper C（3）, inverted well A（4）, inverted well B（5）With inverted well C（6）Filter is provided with from the bottom to top（7）And flowmeter（8）；

   The pumped well A (1), pumped well B（2）With water pumper C（3）Upper end is horizontally installed with water inlet pipe（9）, inverted well A（4）、 Inverted well B（5）With inverted well C（6）On be horizontally installed with outlet pipe（18）, water inlet pipe（9）And outlet pipe（18）On be provided with Ball valve（10）；

   The water inlet pipe（9）The other end is provided with water collector（11）, water collector（11）The other end be connected with the main that draws water（12）, Draw water main（12）On suction pump is installed（13）, draw water main（12）The other end is connected with heat exchanger（14）, heat exchanger（14） The other end is provided with recharge main（15）, recharge main（15）On recharge water pump is installed（16）, recharge main（15）It is another End is connected with water knockout drum（17）, water knockout drum（17）The other end connects and outlet pipe（18）On.
2. 2. as claimed in claim 1 take out fills well method for arranging and its pumping-injection mode, it is characterised in that：Pumped well A (1), draw water Well B（2）With water pumper C（3）In angular distribution.
3. 3. as claimed in claim 1 take out fills well method for arranging and its pumping-injection mode, it is characterised in that：Inverted well A（4）, recharge Well B（5）With inverted well C（6）In angular distribution.