阅读说明：本技术 一种地下分支交汇地热换热井 (Underground branch intersection geothermal heat exchange well ) 是由 张景明 于 2021-10-16 设计创作，主要内容包括：一种地下分支交汇地热换热井,由取水井和回水井组成,取水井由深井泵层Ⅰ、光管层Ⅰ和换热层Ⅰ构成,回水井由深井泵层Ⅱ、光管层Ⅱ和换热层Ⅱ构成,换热层Ⅰ和换热层Ⅱ为花管,换热层Ⅰ和换热层Ⅱ均为远离取水井和回水井的定向管,换热层Ⅰ和换热层Ⅱ均为在地质热层中上下分布的相同数量的多层,且换热层Ⅰ和换热层Ⅱ在高度方向相互错位,高度相近的一个换热层Ⅰ和一个换热层Ⅱ构成一组一抽一回的分支换热组,每个分支换热组合的尾部近距离交汇。本发明不但所有抽水井和回水井地面集中布置,地下采热放射布置,采热面积大,工程占地面积小,建设和运行成本低；且一抽一回定期交换,解决了回水和抽水堵塞问题；在地质热层较厚时地热利用率较高。(The utility model provides an underground branch ground heat transfer well that crosses, constitute by water intaking well and return well, the water intaking well comprises deep well pump bed I, fluorescent tube layer I and heat transfer layer I, the return well comprises deep well pump bed II, fluorescent tube layer II and heat transfer layer II, heat transfer layer I and heat transfer layer II are the floral tube, heat transfer layer I and heat transfer layer II are the directional pipe of keeping away from water intaking well and return well, heat transfer layer I and heat transfer layer II are the multilayer of the same quantity that distributes about in the geology heat layer, and heat transfer layer I and heat transfer layer II misplace each other in the direction of height, a heat transfer layer I and a heat transfer layer II that highly are close constitute a set of branch heat transfer group of taking out one time, the afterbody of every branch heat transfer combination closely crosses. The invention not only has the centralized arrangement of all the pumping wells and the backwater wells on the ground, the underground heat collection radiation arrangement, large heat collection area, small engineering occupied area and low construction and operation cost; and the water pumping and returning are regularly exchanged, so that the problems of water returning and water pumping blockage are solved; when the geological heat layer is thick, the heat utilization rate is high.)

1. A geothermal heat exchange well with underground branch intersection is composed of a water taking well (A) and a water returning well (B), wherein the water taking well (A) is composed of a deep well pump layer I (A1), a light pipe layer I (A2) and a heat exchange layer I (A3), the water returning well (B) is composed of a deep well pump layer II (B1), a light pipe layer II (B2) and a heat exchange layer II (B3), the heat exchange layer I (A3) and the heat exchange layer II (B3) are flower tubes, the geothermal heat exchange well is characterized in that the flower tubes of the heat exchange layer I (A3) and the flower tubes of the heat exchange layer II (B3) are all oriented tubes far away from the ground vertical direction of the well mouths of the water taking well (A) and the water returning well (B), the heat exchange layer I (A3) and the heat exchange layer II (B3) are multiple layers distributed in the same number in the geological heat exchange layer up and down, the heat exchange layer I (A3) and the heat exchange layer II (B3) are mutually staggered in the height direction, one heat exchange layer I (A) and one heat exchange layer II (B) and one heat exchange layer (B) is a group 3 which is staggered with one group, the tail parts of the branch heat exchange combinations are closely intersected.

2. The underground branch junction geothermal heat exchange well according to claim 1, wherein the light pipe layer i (a 2) and the light pipe layer ii (B2) are single light pipes, the single light pipes extend to the whole geological heat layer, each pipe of the multi-layer heat exchange layer i (A3) is led out from the geological heat layer section of the single light pipe of the light pipe layer i (a 2) in a layered manner, and the multi-layer heat exchange layer ii (B3) is led out from the geological heat layer section of the single light pipe of the light pipe layer ii (B2) in a layered manner.

3. The geothermal heat exchange well for underground branch junction according to claim 1, wherein the light pipe layer i (a 2) and the light pipe layer ii (B2) are single light pipes with a large diameter, the multi-layer heat exchange layer i (A3) is led out from the light pipe layer i (a 2), and the multi-layer heat exchange layer ii (B3) is led out from the light pipe layer ii (B2).

4. The underground branch junction geothermal heat exchange well as defined in claim 1, wherein the deep well pump layer i (a 1) and the deep well pump layer ii (B1) have a larger diameter, the optical pipe layer i (a 2) is a plurality of optical pipes with a smaller diameter led out from the deep well pump layer i (a 1) with a larger diameter, the multilayer heat exchange layer i (A3) is a floral pipe connected with the plurality of optical pipes led out from the deep well pump layer i (a 1), the optical pipe layer ii (B2) is a plurality of optical pipes with a smaller diameter led out from the deep well pump layer ii (B1), and the multilayer heat exchange layer ii (B3) is a floral pipe connected with the plurality of optical pipes led out from the deep well pump layer ii (B1).

5. The underground branch junction geothermal heat exchange well according to claim 1, wherein the one-eye water taking well (A) and the one-eye water returning well (B) form a group, a geothermal heat exchange mode is formed by one or more groups of water taking wells and water returning wells, geothermal heat exchange well groups are intensively arranged on the ground surface at a short distance, and a heat exchange layer I (A3) and a heat exchange layer II (B3) of the geothermal heat exchange well groups are radially arranged.

6. The geothermal heat-exchange well for underground branch junction according to claim 1, wherein the directional pipes are horizontal directional pipes or inclined directional pipes extending from the ground vertical direction of the well heads of the water taking well (A) and the water returning well (B), and the heat-exchange layer I (A3) and the heat-exchange layer II (B3) are the directional pipes extending horizontally or obliquely.

7. The underground branch junction geothermal heat exchange well according to claim 1, wherein the tail part of each branch heat exchange combination is extended after meeting in a close distance.

Technical Field

The invention relates to an underground branch intersection geothermal heat exchange well.

Background

The Chinese patent application with application number of 202111167687.4 and application date of 2021, 10 and 7 discloses a geothermal utilization device. The device utilizes a plurality of groups of heat exchange pipes to extend to the periphery to improve the heat exchange efficiency. The device is suitable for the situation that the geological heat layer is thin. If the geological heat is still thick, the defect of the device is shown that the geothermal utilization rate is low, so that the design of the branch intersection geothermal heat exchange well with high geothermal utilization rate when the geological heat is thick is a technical problem to be solved at present.

Disclosure of Invention

The invention aims to solve the technical problem of providing an underground branch junction geothermal heat exchange well which has higher heat utilization rate when a geological heat layer is thicker.

The technical scheme for solving the technical problem is as follows:

the utility model provides a divide branch to cross geothermol power heat transfer well, by getting water well and return water well constitution, it comprises deep well pump bed I to get the water well, fluorescent tube layer I and heat transfer layer I, the return water well comprises deep well pump bed II, fluorescent tube layer II and heat transfer layer II, heat transfer layer I and heat transfer layer II are flower tubes, heat transfer layer I and heat transfer layer II are the directional pipe of keeping away from getting water well and return water well upper mouth ground vertical direction, heat transfer layer I and heat transfer layer II are the multilayer of the same quantity that distributes about in the geology heat layer, and heat transfer layer I and heat transfer layer II misplace each other in the direction of height, a heat transfer layer I and a heat transfer layer II that highly is close constitute a set of branch heat transfer group of pumping back, the afterbody of every branch heat transfer combination closely crosses.

As a preferable scheme of the invention, the light pipe layer I and the light pipe layer II are single light pipes, the single light pipe extends to the whole geological thermal layer, each pipe of the multilayer heat exchange layer I is led out from the geological thermal layer section of the single light pipe of the light pipe layer I in a layered mode, and the multilayer heat exchange layer II is led out from the geological thermal layer section of the single light pipe of the light pipe layer II in a layered mode.

As a preferable scheme of the invention, the light pipe layer I and the light pipe layer II are single light pipes with larger diameters, the multi-layer heat exchange layer I is led out from the light pipe layer I, and the multi-layer heat exchange layer II is led out from the light pipe layer II.

As a preferable scheme of the present invention, the deep well pump layer i and the deep well pump layer ii have a larger diameter, the light pipe layer i is a plurality of light pipes with a smaller diameter led out from the deep well pump layer i with a larger diameter, the multi-layer heat exchange layer i is a perforated pipe connected with the plurality of light pipes led out from the deep well pump layer i, the light pipe layer ii is a plurality of light pipes with a smaller diameter led out from the deep well pump layer ii with a larger diameter, and the multi-layer heat exchange layer ii is a perforated pipe connected with the plurality of light pipes led out from the deep well pump layer ii.

As a preferred scheme of the invention, one eye of water taking well and one eye of water returning well form a group, a plurality of groups of water taking wells and water returning wells form a geothermal heat exchange well group, the geothermal heat exchange well group is intensively arranged on the ground surface at a short distance, and a heat exchange layer I and a heat exchange layer II of the geothermal heat exchange well group are radially arranged.

The directional pipes are horizontal extension directional pipes or inclined extension directional pipes which are far away from the ground vertical direction of well mouths of the water taking well (A) and the water returning well (B) and are formed by heat exchange layer I (A3) flower pipes and heat exchange layer II (B3) flower pipes.

As a preferred scheme of the invention, the tail parts of each branch heat exchange combination are extended to a certain extent after being closely converged.

Compared with the prior art, the invention not only has the centralized arrangement of all the pumping wells and the backwater wells on the ground, but also has the advantages of underground heat collection and radiation arrangement, large heat collection area, small engineering occupied area and low construction cost; moreover, the water is periodically exchanged once pumping and once returning, so that the problems of water returning and water pumping blockage are solved; when the geological heat layer is thick, the heat utilization rate is high.

Drawings

FIG. 1 is a schematic structural view of the present invention (first embodiment);

FIG. 2 is a schematic structural view of the present invention (second embodiment);

FIG. 3 is a schematic structural view of the present invention (third embodiment);

FIG. 4 is a schematic structural view of the present invention (fourth embodiment);

FIG. 5 is a schematic structural view of the present invention (fifth embodiment);

FIG. 6 is a schematic structural view of the present invention (sixth embodiment);

FIG. 7 is a schematic diagram of a surface concentration arrangement, subsurface radiation arrangement (first embodiment);

fig. 8 is a schematic diagram of a surface concentrated arrangement, subsurface radial arrangement (second embodiment).

Detailed Description

As shown in the figure, the underground branch intersection geothermal heat exchange well comprises a water taking well A and a water return well B, wherein the water taking well A comprises a deep well pump layer IA 1, a light pipe layer IA 2 and a heat exchange layer IA 3, the water return well B comprises a deep well pump layer IIB 1, a light pipe layer IIB 2 and a heat exchange layer IIB 3, the heat exchange layer IA 3 and the heat exchange layer IIB 3 are flower tubes, the heat exchange layer IA 3 and the heat exchange layer IIB 3 are oriented tubes far away from the water taking well A and the water return well B, the heat exchange layer IA 3 and the heat exchange layer IIB 3 are multiple layers which are distributed in the geological heat layer in the same number and vertically, the heat exchange layer IA 3 and the heat exchange layer IIB 3 are staggered in the height direction, one heat exchange layer IA 3 and one heat exchange layer IIB 3 which are close in height form a group of branch heat exchange groups, one branch heat exchange group is pumped back, and the tail of each branch heat exchange group is intersected in a short distance.

The light pipe layer IA 2 and the light pipe layer IIB 2 are single light pipes, the single light pipes extend to the whole geological thermal layer, the quincunx pipes of the multilayer heat exchange layer IA 3 are led out from the geological thermal layer section of the single light pipe of the light pipe layer IA 2 in a layered mode, and the multilayer heat exchange layer IIB 3 is led out from the geological thermal layer section of the single light pipe of the light pipe layer IIB 2 in a layered mode.

The light pipe layer IA 2 and the light pipe layer IIB 2 are single light pipes with large diameters, the multilayer heat exchange layer IA 3 is led out from the light pipe layer IA 2, and the multilayer heat exchange layer IIB 3 is led out from the light pipe layer IIB 2.

The deep well pump layer IA 1 and the deep well pump layer IIB 1 are large in diameter, the light pipe layer IA 2 is a plurality of light pipes with small diameter led out from the deep well pump layer IA 1 with large diameter, the multilayer heat exchange layer IA 3 is flower pipes which are respectively connected with the light pipes led out from the deep well pump layer IA 1, the light pipe layer IIB 2 is a plurality of light pipes with small diameter led out from the deep well pump layer IIB 1 with large diameter, and the multilayer heat exchange layer IIB 3 is flower pipes which are respectively connected with the light pipes led out from the deep well pump layer IIB 1.

The geothermal heat exchange well group is arranged on the ground surface in a short distance and the heat exchange layer IA 3 and the heat exchange layer IIB 3 of the geothermal heat exchange well group are arranged in a radial mode.

The directional pipes are horizontal extension directional pipes or inclined extension directional pipes which are far away from the ground vertical direction of the wellhead of the water taking well A and the wellhead of the water returning well B in the heat exchange layer IA 3 floral pipes and the heat exchange layer IIB 3 floral pipes.

The tail parts of each branch heat exchange combination are closely converged and then extend to a certain extent.