CN217794722U

CN217794722U - Ecological filter equipment of recharging well

Info

Publication number: CN217794722U
Application number: CN202221958524.8U
Authority: CN
Inventors: 崔国华; 范兴龙; 刘海青; 姬明泽
Original assignee: Dongying Longyuan Clean Energy Technology Co ltd
Current assignee: Dongying Longyuan Clean Energy Technology Co ltd
Priority date: 2022-07-27
Filing date: 2022-07-27
Publication date: 2022-11-15
Anticipated expiration: 2032-07-27

Abstract

The utility model belongs to the technical field of geothermal well recharging, in particular to an ecological filtering device of a recharging well, which comprises an outer sleeve, an inner sleeve is coaxially arranged in the outer sleeve, the inner sleeve is positioned at the position of a water storage layer, the pipe wall of the inner sleeve has a water permeable function, and the outer wall of the inner sleeve is wrapped with high-strength water filtering cotton; the pipe wall of the outer sleeve pipe positioned on the water storage layer also has a water permeable function. The utility model discloses can be more meticulous filtration fall the impurity of tail aquatic, through meticulous filterable water body, water composition, gaseous persistence condition, temperature, pressure etc. all can change, the sensitivity of sandstone to water has been reduced, avoid appearing recharging fluid and the original fluid chemical composition immiscible condition in the stratum, have the associated gas that blocks in the bottom and reversely enter into interior sleeve pipe, it forms the air lock also to prevent that the gas in the tail aquatic from entering into the stratum, prevent that non-recharging layer silt from entering into the cover intraductally, the contact between the outer tube reservoir is reduced, the influence of pressure between each reservoir has been avoided, be favorable to the recharging of tail water.

Description

Ecological filter equipment of recharging well

Technical Field

The utility model relates to an ecological filter equipment of recharge well belongs to geothermal well recharge technical field.

Background

Geothermal energy is a clean energy source which is pollution-free and renewable, and the recharging is a method of re-injecting utilized geothermal water into a geothermal recharging well into a geothermal reservoir section, so that the recharging can solve the problem of geothermal wastewater, improve or recover the heat production capacity of the geothermal reservoir, maintain the fluid pressure of the geothermal reservoir, maintain the continuous exploitation and cyclic utilization of the geothermal field and enable the geothermal energy to become a sustainable clean energy source.

However, in the middle-deep geothermal well recharging system at the present stage, some problems which are not beneficial to recharging can occur in the operation process, so that the recharging fluid is not compatible with the chemical components of the original fluid in the stratum. The action of microorganisms; sensitivity of sandstone to water; solid suspensions (fine particles, microbes after corrosion); fine particles move in the stratum along with the water flow and stay; a trapped gas; mixing air; incompatible chemical additives and inhibitors; thermodynamic changes (temperature, pressure) occurring during the recharge process; the flow rate of the recharge water and the like can influence geothermal recharge.

At present, a cutting water filter pipe or a stainless steel wire-wound sieve pipe is mostly adopted for extensive recharging, and the recharging problem cannot be solved.

SUMMERY OF THE UTILITY MODEL

According to the not enough among the above prior art, the utility model discloses the technical problem who solves is: provides an ecological filter device of a recharge well, which enhances the filtering effect on the recharge water body.

The ecological filtering device of the recharging well comprises an outer sleeve, an inner sleeve is coaxially arranged in the outer sleeve, the inner sleeve is positioned at the position of a water storage layer, the pipe wall of the inner sleeve has a water permeable function, the outer wall of the inner sleeve is wrapped with high-strength water filtering cotton, and the high-strength water filtering cotton completely fills the area between the outer sleeve and the inner sleeve; the pipe wall of the outer sleeve pipe positioned on the water storage layer has a water permeable function.

The inner sleeve is arranged in the outer sleeve, and the high-strength water filtering cotton is wrapped outside the inner sleeve, so that fine filtering can be performed, and the condition that the recharge fluid is not dissolved in chemical components of the original fluid in the stratum is avoided.

Furthermore, a sand setting layer is arranged below the water storage layer, and the pipe wall of the outer sleeve positioned on the sand setting layer is closed. Part of impurities are filtered and trapped in the high-strength draining cotton, and the impurities which are not trapped fall into a sand setting layer at the bottom of the outer sleeve to store the filtered impurities.

In order to effectively support the weight of the inner sleeve, a support body is welded in the outer sleeve.

Preferably, the supporting bodies are uniformly distributed in a circumferential array in the outer sleeve.

The inner sleeve is composed of a plurality of sections and adopts threaded connection. The processes of well washing, overhaul, maintenance and the like in the later period are convenient to extract to the ground through the operation vehicle.

Further, the bottom of the screw thread is higher than the high-strength draining cotton.

Compared with the prior art, the utility model the beneficial effect who has is:

ecological filter equipment of recharge well, interior sleeve pipe in the outer tube sets up, interior sleeve pipe outsourcing high strength drainage is cotton, can be more meticulous filtration fall the impurity in the tail water, filter back part impurity and filtered to be detained in high strength drainage is cotton, the impurity that does not detain then falls into the sand setting layer of outer tube bottom, stores the impurity after filtering. The retention conditions, temperature, pressure and the like of water body components and gas of the water body after fine filtration can be changed, the sensitivity of sandstone to water is reduced, the condition that the recharge fluid is not dissolved with the chemical components of the original fluid in the stratum is avoided, associated gas in the bottom layer is prevented from reversely entering the inner sleeve, the gas in tail water is also effectively prevented from entering the stratum to form air blockage, silt in a non-recharge layer (mudstone layer) is prevented from entering the sleeve, the relation between outer sleeve reservoirs is reduced, the influence of pressure among the reservoirs is avoided, the recharge of tail water is facilitated, the service life of the outer sleeve is prolonged, and the corrosion of the sleeve is slowed down.

Drawings

FIG. 1 is a schematic sectional view of the present invention;

fig. 2 is a schematic top view of the present invention.

In the figure: an outer sleeve 1; an inner sleeve 2; high-strength draining cotton 3; a support body 4; a water baffle 5; a water storage layer 6; a sand setting layer 7.

Detailed Description

The invention will be further described with reference to specific examples. However, in the description of the present invention, it should be noted that the terms "front end", "rear end", "left and right", "upper", "lower", "horizontal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.

In the description of the present invention, it should be further noted that, unless otherwise explicitly specified or limited, the terms "disposed," "connected," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

As shown in fig. 1 to 2, the ecological filtering device for the recharge well according to the present embodiment includes an outer sleeve 1, an inner sleeve 2 is coaxially disposed in the outer sleeve 1, the inner sleeve 2 is located at a position of a water storage layer 6, a pipe wall of the inner sleeve 2 has a water permeable function, the outer wall of the inner sleeve 2 is wrapped with high-strength filter water cotton 3, the high-strength filter water cotton 3 completely fills an area between the outer sleeve 1 and the inner sleeve 2, and a water baffle 5 is disposed at a top end of the filter water cotton 3 to prevent tail water from washing the filter water cotton 3 during the recharge process, so as to protect the filter water cotton; the pipe wall of the outer sleeve 1 positioned on the water storage layer 6 also has a water permeable function.

The lower part of the water storage layer 6 of this embodiment is provided with a sand setting layer 7, and the pipe wall of the outer sleeve 1 positioned on the sand setting layer 7 is closed. Part of impurities are filtered and trapped in the high-strength draining cotton 3, and the impurities which are not trapped fall into a sand setting layer 7 at the bottom of the outer sleeve to store the filtered impurities.

In order to effectively support the weight of the inner sleeve 2, the support bodies 4 are welded in the outer sleeve 1 of the present embodiment, and the support bodies 4 are uniformly distributed in a circumferential array in the outer sleeve 1.

The inner jacket tube 2 of the present embodiment is formed of a plurality of sections and is screwed together. The processes of well washing, overhaul, maintenance and the like in the later period are convenient to extract to the ground through the operation vehicle.

The middle-deep geothermal water recovery well or the recharge well adopts a thermal reservoir below 1000 meters underground for water taking or recharging, and the water taking layer and the recharge layer are positioned at the same layer and are positioned in the sandstone water-rich layer. In the drilling process, the 177.8 outer sleeves 1 are connected together and put into an underground target layer, 144 inner sleeves 2 are arranged in the 177.8 outer sleeves 1, high-strength filter water cotton 3 is wrapped outside the outer walls of the inner sleeves 2, fine filtration can be realized, the length of 114 inner sleeves 2 can be customized according to requirements, and the height of the inner sleeves 2 is basically equal to that of the water storage layer 6; the size of each pipe diameter, the position of the variable diameter, the size and the like can be adjusted according to specific conditions. The height of the water storage layer 6 is 80-150 m, and the height of the sand settling layer 7 is 50-100 m.

Of course, the foregoing is merely exemplary of the present invention and should not be construed as limiting the scope of the present invention. The present invention is not limited to the above examples, and the technical field of the present invention is equivalent to the changes and improvements made in the actual range of the present invention, which should be attributed to the patent coverage of the present invention.

Claims

1. The utility model provides an ecological filter equipment of recharging well which characterized in that: the water storage device comprises an outer sleeve (1), an inner sleeve (2) is coaxially arranged in the outer sleeve (1), the inner sleeve (2) is located at the position of a water storage layer (6), the wall of the inner sleeve (2) has a water permeable function, the outer wall of the inner sleeve (2) is wrapped with high-strength water filtering cotton (3), and the high-strength water filtering cotton (3) completely fills the area between the outer sleeve (1) and the inner sleeve (2); the outer sleeve (1) is positioned on the pipe wall of the water storage layer (6) and has a water permeable function.

2. The ecological filter equipment of recharging well of claim 1, characterized in that: a sand setting layer (7) is arranged below the water storage layer (6), and the pipe wall of the outer sleeve (1) positioned on the sand setting layer (7) is closed.

3. The ecological filter equipment of recharging well of claim 1 or 2, characterized in that: the support body (4) is welded in the outer sleeve (1).

4. The ecological filter equipment of recharging well of claim 3, characterized in that: the supporting bodies (4) are uniformly distributed in the outer sleeve (1) in a circumferential array.

5. The ecological filter equipment of recharging well of claim 1, characterized in that: the inner sleeve (2) is composed of a plurality of sections and is connected by threads.

6. The ecological filter equipment of recharging well of claim 5, characterized in that: the bottom of the thread (5) is higher than the high-strength draining cotton (3).