阅读说明：本技术 一种中低温地热水回灌系统及方法 (Medium-low temperature geothermal water recharging system and method ) 是由 谢迎春 于 2021-09-15 设计创作，主要内容包括：本发明公开了一种中低温地热水回灌系统及方法,其中,系统包括第一过滤装置、第二过滤装置、存水箱和储气罐,第二过滤装置与第一过滤装置及存水箱连接,第一过滤装置包括箱体和内筒,内筒固定设置在箱体内,内筒底部与箱体底部之间形成进水道,内筒中设置有潜水泵,潜水泵的出水端与第二过滤装置连接；位于箱体顶部设置有地热尾水进水管；第二过滤装置为旋流除砂器,旋流除砂器的出水端与所述存水箱连通,旋流除砂器与存水箱之间设置有单向阀；储气罐其中一个出气端与存水箱连通。本发明在实际的使用中能够提高地热尾水的回灌量及回灌效率,保证地热资源的循环、可持续利用；另外,本发明还公开了一种中低温地热水回灌方法。(The invention discloses a medium-low temperature geothermal water recharging system and method, wherein the system comprises a first filtering device, a second filtering device, a water storage tank and a gas storage tank, the second filtering device is connected with the first filtering device and the water storage tank, the first filtering device comprises a box body and an inner cylinder, the inner cylinder is fixedly arranged in the box body, a water inlet channel is formed between the bottom of the inner cylinder and the bottom of the box body, a submersible pump is arranged in the inner cylinder, and the water outlet end of the submersible pump is connected with the second filtering device; a geothermal tail water inlet pipe is arranged at the top of the box body; the second filtering device is a rotational flow desander, the water outlet end of the rotational flow desander is communicated with the water storage tank, and a one-way valve is arranged between the rotational flow desander and the water storage tank; one of the air outlet ends of the air storage tank is communicated with the water storage tank. The invention can improve the recharge quantity and recharge efficiency of the geothermal tail water in actual use, and ensure the circulation and sustainable utilization of geothermal resources; in addition, the invention also discloses a medium and low temperature geothermal water recharging method.)

1. A medium and low temperature geothermal water recharging system is characterized in that: comprises a first filtering device, a second filtering device, a water storage tank and an air storage tank, wherein the second filtering device is connected with the first filtering device and the water storage tank,

the first filtering device comprises a box body and an inner cylinder, the inner cylinder is fixedly arranged in the box body, a water inlet channel is formed between the bottom of the inner cylinder and the bottom of the box body, a submersible pump is arranged in the inner cylinder, and the water outlet end of the submersible pump is connected with the second filtering device; a geothermal tail water inlet pipe is arranged at the top of the box body;

the second filtering device is a rotational flow desander, the water outlet end of the rotational flow desander is communicated with the water storage tank, and a one-way valve is arranged between the rotational flow desander and the water storage tank;

one of the air outlet ends of the air storage tanks is communicated with the water storage tank, the water outlet end of the water storage tank is connected with a water return pipe, the water return pipe is connected with a sealing assembly, the sealing assembly is arranged at the wellhead of the recharge well, and the other air outlet end of the air storage tank is connected with the sealing assembly.

2. The medium and low temperature geothermal water recharging system according to claim 1, wherein: the bottom of the box body is provided with supporting legs, and the supporting legs are provided with protective pads in contact with the ground.

3. The medium and low temperature geothermal water recharging system according to claim 1, wherein: the inner cylinder is connected with the box body through a support frame.

4. The medium and low temperature geothermal water recharging system according to claim 1, wherein: at least one layer of filter screen is arranged at the bottom of the box body.

5. The medium and low temperature geothermal water recharging system according to claim 1, wherein: the side of the box body is provided with a slag discharge port, and the slag discharge port is provided with a slag discharge door capable of being opened and closed.

6. The medium and low temperature geothermal water recharging system according to claim 5, wherein: the bottom in the box body is provided with an inclined plane.

7. The medium and low temperature geothermal water recharging system according to claim 1, wherein: a water pump is arranged between the second filtering device and the water storage tank.

8. The medium and low temperature geothermal water recharging system according to claim 1, wherein: the gas holder is nitrogen gas storage jar.

9. The medium and low temperature geothermal water recharging system according to claim 1, wherein: a booster pump is arranged between the gas storage tank and the water storage tank.

10. A medium-low temperature geothermal water recharging method is characterized in that: comprising recharging with the medium-low temperature geothermal water recharging system of any one of claims 1-9.

Technical Field

The invention relates to the technical field of geothermal exploitation, in particular to a medium-low temperature geothermal water recharging system; in addition, the invention also relates to a medium and low temperature geothermal water recharging method.

Background

Geothermal energy is renewable thermal energy from deep within the earth that results from the decay of the earth's molten magma and radioactive materials. The circulation of the deep underground water and the invasion of magma from an extremely deep place into the crust bring heat from deep underground to near surface. Humans use geothermal energy in the form of geothermal water or steam to the surface by digging geothermal wells. At present, geothermal power generation, heating, greenhouses, breeding, rehabilitation, medical treatment, chemical raw material extraction, tourism, bottled mineral water and the like are widely utilized, the exploitation amount is increased day by day, most geothermal water after heat energy extraction is discharged to the ground surface, thermal pollution and chemical pollution are caused, meanwhile, the still water level of a geothermal well is led to be reduced year by year, and the waste of geothermal water is caused to cause the exhaustion of geothermal water for a long time.

Geothermal tail water recharging refers to a technology for re-injecting geothermal fluid with reduced temperature into a heat reservoir through a recharging well. The geothermal tail water recharge has very important significance for prolonging the service life of the hot field, reducing the discharge of the heat supply geothermal tail water, polluting the environment and preventing the ground from sinking caused by mining.

According to different pressure modes of injecting fluid into a reservoir, geothermal tail water recharging modes can be divided into pressurization recharging and negative pressure recharging. When the permeability of the aquifer of the recharge well is poor and the water absorption capacity of the stratum cannot meet the actual recharge requirement, the pressure is increased in the recharge system under the action of external force, so that the natural water absorption capacity of the stratum is compensated, and the recharge requirement is met; therefore, how to realize recharging of the geothermal tail water is an important measure for sustainable utilization of geothermal resources.

Disclosure of Invention

The invention aims to provide a medium-low temperature geothermal water recharging system, which can improve the recharging amount of geothermal tail water in actual use and ensure the circulation and sustainable utilization of geothermal resources; in addition, the invention also discloses a medium and low temperature geothermal water recharging method.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows:

a medium-low temperature geothermal water recharging system comprises a first filtering device, a second filtering device, a water storage tank and a gas storage tank, wherein the second filtering device is connected with the first filtering device and the water storage tank,

the first filtering device comprises a box body and an inner cylinder, the inner cylinder is fixedly arranged in the box body, a water inlet channel is formed between the bottom of the inner cylinder and the bottom of the box body, a submersible pump is arranged in the inner cylinder, and the water outlet end of the submersible pump is connected with the second filtering device; a geothermal tail water inlet pipe is arranged at the top of the box body;

the second filtering device is a rotational flow desander, the water outlet end of the rotational flow desander is communicated with the water storage tank, and a one-way valve is arranged between the rotational flow desander and the water storage tank;

one of the air outlet ends of the air storage tanks is communicated with the water storage tank, the water outlet end of the water storage tank is connected with a water return pipe, the water return pipe is connected with a sealing assembly, the sealing assembly is arranged at the wellhead of the recharge well, and the other air outlet end of the air storage tank is connected with the sealing assembly.

Wherein, the bottom of the box body is provided with a supporting leg, and a protective pad in contact with the ground is arranged on the supporting leg.

Further optimize, the inner tube passes through the support frame and is connected with the box.

Further optimize, the bottom of the box body is provided with at least one layer of filter screen.

Wherein, the box side is provided with the row's cinder notch, and row's cinder notch department is provided with the row's cinder door that can open and close.

Further preferably, the bottom in the box body is provided with an inclined plane.

Wherein a water pump is arranged between the second filtering device and the water storage tank.

Further optimizing, the gas holder is nitrogen gas storage jar.

Further optimized, a booster pump is arranged between the air storage tank and the water storage tank.

The invention also discloses a medium and low temperature geothermal water recharging method, which comprises the step of recharging geothermal water by using the medium and low temperature geothermal water recharging system.

Compared with the prior art, the invention has the following beneficial effects:

the geothermal tail water after being utilized enters the box body, floaters in the geothermal tail water can float above the liquid level of the box body, at the moment, the geothermal tail water can enter the inner cylinder from the lower side of the inner cylinder, at the moment, the geothermal tail water directly enters the cyclone desander under the action of the submersible pump, silt in the geothermal tail water can be removed through the arranged cyclone desander, the geothermal tail water after being filtered twice is sent to the water storage tank for temporary storage, at the moment, the pressure in the water storage tank is increased by pressurizing the water storage tank, and then the geothermal tail water in the water storage tank is sent to the recharging well after being pressurized; at this moment, because the other end of giving vent to anger of gas holder is connected with seal assembly, can make the well head department of recharging well form seal structure through the seal assembly who sets up, present the malleation state in the recharging well, the quick recharge of the geothermol power tail water of being convenient for improves recharging efficiency.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are required to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained according to the drawings without inventive efforts.

Fig. 1 is an overall schematic diagram of the present invention.

Reference numerals:

101-a first filtering device, 102-a second filtering device, 103-a water storage tank, 104-an air storage tank, 105-a box body, 106-an inner cylinder, 107-a water inlet channel, 108-a submersible pump, 109-a geothermal tail water inlet pipe, 110-a one-way valve, 111-a water return pipe, 112-a sealing component, 113-a recharging well, 114-a supporting leg, 115-a supporting frame, 116-a filtering screen, 117-a slag discharge port, 118-a slag discharge door, 119-an inclined plane, 120-a water pump, 121-a booster pump, 122-a first one-way valve, 123-a stop valve, 124-a valve, 125-an air pressure sensor, 126-a sealing cylinder and 127-a sealing cover.

Detailed Description

In the following, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the embodiments of the invention. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.

In the description of the embodiments of the present invention, it should be understood that the terms "length", "vertical", "horizontal", "top", "bottom", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only used for convenience in describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the embodiments of the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. Specific meanings of the above terms in the embodiments of the present invention can be understood by those of ordinary skill in the art according to specific situations.

In embodiments of the invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise the first and second features being in direct contact, or the first and second features being in contact, not directly, but via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.

The following disclosure provides many different embodiments or examples for implementing different configurations of embodiments of the invention. To simplify the disclosure of embodiments of the invention, the components and arrangements of specific examples are described below. Of course, they are merely examples and are not intended to limit embodiments of the invention. Furthermore, embodiments of the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed.

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

Example one

Referring to fig. 1, the present embodiment discloses a medium and low temperature geothermal water recharging system, which comprises a first filtering device 101, a second filtering device 102, a water storage tank 103 and an air storage tank 104, wherein the second filtering device 102 is connected with the first filtering device 101 and the water storage tank 103,

the first filtering device 101 comprises a box body 105 and an inner cylinder 106, the inner cylinder 106 is fixedly arranged in the box body 105, a water inlet channel 107 is formed between the bottom of the inner cylinder 106 and the bottom of the box body 105, a submersible pump 108 is arranged in the inner cylinder 106, and the water outlet end of the submersible pump 108 is connected with the second filtering device 102; a geothermal tail water inlet pipe 109 is arranged at the top of the box body 105;

the second filtering device 102 is a cyclone desander, the water outlet end of the cyclone desander is communicated with the water storage tank 103, and a one-way valve 110 is arranged between the cyclone desander and the water storage tank 103;

one of the air outlet ends of the air storage tank 104 is communicated with the water storage tank 103, the water outlet end of the water storage tank 103 is connected with a water return pipe 111, the water return pipe 111 is connected with a sealing component 112, the sealing component 112 is arranged at the wellhead of the recharge well 113, and the other air outlet end of the air storage tank 104 is connected with the sealing component 112.

The invention mainly comprises a first filter device 101, a second filter device 102, a water storage tank 103 and an air storage tank 104, in actual use, utilized geothermal tail water enters a tank body 105, floating objects in the geothermal tail water can float above the liquid level of the tank body 105, the geothermal tail water enters an inner cylinder 106 from the lower side of the inner cylinder 106 at the moment, the geothermal tail water directly enters a cyclone desander under the action of a submersible pump 108, silt in the geothermal tail water can be removed through the arranged cyclone desander, the geothermal tail water after twice filtration is sent to the water storage tank 103 for temporary storage, at the moment, the air storage tank 104 pressurizes the inside of the water storage tank 103 to increase the pressure in the water storage tank, and then the geothermal tail water in the water storage tank is pressurized and then sent to a recharging well 113 through a pipe; at this time, because the other air outlet end of the air storage tank 104 is connected with the sealing component 112, a sealing structure can be formed at the wellhead of the recharge well 113 through the arranged sealing component 112, and the recharge well 113 is in a positive pressure state, so that the geothermal tail water can be recharged quickly, and the recharge efficiency is improved.

In this embodiment, the air storage tank 104 can not only pressurize the water in the water storage tank 103, which is convenient for increasing the pressure of the geothermal tail water, reducing the use of the water pump 120 and saving the cost; meanwhile, the gas storage tank 104 forms positive pressure to the recharging well 113, and geothermal tail water enters the recharging well 113 to further improve the recharging efficiency.

Wherein, the bottom of the box 105 is provided with a supporting leg 114, and the supporting leg 114 is provided with a protective pad contacting with the ground.

Further optimized, the inner cylinder 106 is connected with the box body 105 through a support frame 115; the inner cylinder 106 is mounted by the support bracket 115.

Further optimization, at least one layer of filter screen 116 is arranged at the bottom of the box body 105; the filtering effect can be further improved by the arranged filtering net 116.

Further preferably, a slag discharge port 117 is arranged on the side surface of the box body 105, and a slag discharge door 118 capable of being opened and closed is arranged at the slag discharge port 117; the slag discharge port 117 is convenient for discharging slag, and can realize the cleaning of floating slag according to the actual use condition in the later period.

Further preferably, the bottom of the box 105 has an inclined slope 119, which is convenient for cleaning up the floating residues.

Further preferably, a water pump 120 is arranged between the second filtering device 102 and the water storage tank 103; the geothermal tail water in the cyclone desander can be further improved by the arranged water pump 120, so that the purpose of separating sand from water is convenient to realize, and meanwhile, the geothermal tail water is convenient to be conveyed to the water storage tank 103.

Wherein, gas holder 104 is nitrogen gas storage jar, avoids the iron ion and the air in the geothermol power tail water, and nitrogen gas has stable characteristic simultaneously, is convenient for realize carrying out the purpose of pressure boost to holding water tank 103 and recharging well 113.

Further preferably, a booster pump 121 is disposed between the air storage tank 104 and the water storage tank 103, so as to create a positive pressure environment for the water storage tank 103.

It should be noted that, in this embodiment, the sealing assembly 112 includes a sealing cylinder 126 and a sealing cover 127, the sealing cylinder 126 is integrally in a T-shaped structure, the sealing cylinder 126 is installed in the recharging well 113, a lower end of the sealing cylinder 126 extends below a liquid level in the recharging well 113, the sealing cover 127 is connected with the sealing cylinder 126 in a sealing manner, the sealing cylinder 126 is fixedly disposed on the ground through an anchor bolt, the water return pipe 111 is connected with the sealing cover 127, and the other end of the air storage tank 104 is communicated with the inside of the recharging well 113 through the sealing cover 127; seal assembly 112 through setting up firstly can form a seal structure in recharging well 113 department, and simultaneously, sealed 126 is installed in recharging well 113 and below the lower extreme extension of sealed 126 advanced the liquid level in recharging well 113, can guarantee that nitrogen gas gets into sealed 126 inside back, avoid nitrogen gas to reveal from recharging well 113 lateral wall gap, can make the nitrogen gas that gets into in the sealed 126 directly act on the geothermol power tail water in recharging well 113, carry out the pressure boost to geothermol power tail water and be convenient for improve the recharging efficiency of geothermol power tail water.

Example two

The embodiment discloses a medium-low temperature geothermal water recharging method, which comprises the following steps of using the medium-low temperature geothermal water recharging system in the first embodiment:

geothermal tail water flows into the box body 105, the floating objects float above the liquid level, and the geothermal tail water enters the inner cylinder 106 from the lower end of the inner cylinder 106; the submersible pump 108 sends the geothermal tail water pump 120 to the cyclone sand remover for sand removal operation, geothermal tail water after sand removal enters the water storage tank 103 for storage, at the moment, nitrogen in the gas storage tank 104 pressurizes the inside of the water storage tank 103, and under the action of the check valve 110, geothermal tail water in the water storage tank 103 enters the recharge well 113, at the moment, nitrogen in the gas storage tank 104 is directly sent to the recharge well 113, so that the recharge well 113 is in a positive pressure state, and the recharge efficiency of the geothermal tail water is improved.

Further optimally, in practical use, a first check valve 122 and a stop valve 123 are arranged on a pipeline between the water storage tank 103 and the recharging well 113, and the check valve 110 is arranged to prevent the geothermal tail water from being poured into the water storage tank 103 due to positive pressure in the recharging well 113; meanwhile, when the pressure in the recharge well 113 is increased by introducing nitrogen gas into the recharge well 113, the shutoff valve 123 is closed.

It should be noted that, in actual use, the two air outlets of the air storage tank 104 are both provided with valves 124, so as to achieve the purpose of adjusting air supply.

Preferably, in actual use, the recharging well 113 and the water storage tank 103 are both provided with an air pressure sensor 125, and the air pressure sensor 125 is connected with the valves 124 arranged on the two air outlets of the air storage tank 104 through a controller. In practical use, the control of the valve 124 is realized by a controller, which is not described in detail herein.

While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, it should be noted that any modifications, equivalents and improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.