WO2018023900A1

WO2018023900A1 - Heat exchanger

Info

Publication number: WO2018023900A1
Application number: PCT/CN2016/106923
Authority: WO
Inventors: 马明辉
Original assignee: 马明辉
Priority date: 2016-08-03
Filing date: 2016-11-23
Publication date: 2018-02-08
Also published as: CN106091751A

Abstract

A heat exchanger, comprising an outer pipe (3) disposed in a borehole drilled vertically downward by a drilling machine and an inner pipe (1) sheathed in the outer pipe (3). A low-temperature circulating medium is injected into a space between the outer pipe (3) and the inner pipe (1) through an inlet of the outer pipe (3); after absorbing heat from the outer pipe (3), the medium becomes a high-temperature circulating medium and flows out from the inner pipe (1), thereby forming a heat exchange circulation, wherein an outer wall of the inner pipe (1) is provided with a turbulence element (2) which allows a fluid between the inner pipe (1) and the outer pipe (3) to generate turbulence.

Description

说明书发明名称:换热器 Manual Title: Heat exchanger

技术领域 Technical field

[0001] 本公幵涉及一种换热器，尤其是一种用于中深层地热采集换热器中的能够增强换热效率的换热器。背景技术 [0001] The present disclosure relates to a heat exchanger, and more particularly to a heat exchanger for enhancing heat exchange efficiency in a medium-deep geothermal heat exchanger. Background technique

[0002] 在节能减排日益成为环境改善的主题今天，地热能作为一种成为了人们越来越认可的清洁能源。获取这些地热能的方式有两种，一种是直接抽取含地热能的地下热水，另一种是间接获取地下热水中地热能，即利通过换热器将中深层地下的地下水中的地热置换出来利用地热。很显然，直接抽取中深层地下热水不具有可持续性，因为这会由于地下水的大量幵采导致一定程度地陷以及土地沙化，由此带来了难以恢复生态灾难。而间接利用地下热水中的地热，是通过向地下钻深井，随后在深井中***含有内外换热管的套管。中深层地下的地热（地下热水或其它形式的熔岩中的热量）将会将外管加热。通过水泵将良好导热的低温循环介质（例如，低温水）注入外管和内管之间的夹层通道，注入的低温循环介质在向下流入的过程中，获取外管壁上传递来的热量，从而加温成中高温循环介质。高温循环介质在泵的作用下被抽取到地面，从而使得高温循环介质所携带的热量为人们所用于各种用途，例如，被广泛应用于化工、石油、动力和原子能等工业部门，用于保证工艺过程对介质所要求的特定温度、地板加热、空调取暖或制冷、发电、地面融雪等。这种间接地热利用方式不会抽取地下水，因此不会影响人们的生活环境，因此是一种可持续的地热采集方式。技术问题 [0002] As energy conservation and emission reduction have increasingly become the theme of environmental improvement, geothermal energy has become a clean energy that people are increasingly recognized as. There are two ways to obtain these geothermal energy. One is to directly extract the underground hot water containing geothermal energy, and the other is to indirectly obtain the geothermal energy in the underground hot water, that is, to pass through the heat exchanger to the groundwater in the middle and deep layers. Geothermal heat is used to make use of geothermal heat. Obviously, the direct extraction of medium and deep underground hot water is not sustainable, because it will cause a certain degree of subsidence and land desertification due to the massive extraction of groundwater, which will make it difficult to restore ecological disasters. The indirect use of geothermal heat in underground hot water is by drilling a deep well into the ground and then inserting a casing containing internal and external heat exchange tubes into the deep well. The underground heat in the middle and deep layers (heat in underground hot water or other forms of lava) will heat the outer tube. A well-heated low-temperature circulating medium (for example, low-temperature water) is injected into the interlayer passage between the outer tube and the inner tube by the water pump, and the injected low-temperature circulating medium acquires the heat transferred from the outer tube wall during the downward flow. Thereby heating into a medium-high temperature circulating medium. The high-temperature circulating medium is pumped to the ground under the action of the pump, so that the heat carried by the high-temperature circulating medium is used for various purposes, for example, it is widely used in industrial sectors such as chemical, petroleum, power and atomic energy to ensure The process requires specific temperatures for the media, floor heating, air conditioning heating or cooling, power generation, ground snow melting, and the like. This indirect heat utilization method does not extract groundwater, so it does not affect people's living environment, so it is a sustainable geothermal collection method. technical problem

[0003] 然而，间接利用地热能这种方式存在的问题是，外管的内壁表面积有限，其能够从周围高温岩层和热水获取并存储在其管壁内的热量有限，而且循环介质在重力和泵送压力的作用下向下流动的速度极快，因此，循环介质流过外管进入内管的吋间极短，循环介质在极短吋间内很难被充分加热并获取更多的热量。因此，这种通常间接利用地热能的方式换热效率很低。在此处键入技术问题描述段落。 [0003] However, the problem of indirectly utilizing geothermal energy is that the inner wall of the outer tube has a limited surface area, and the heat that can be obtained from the surrounding high temperature rock layer and hot water and stored in the tube wall is limited, and the circulating medium is in gravity. The downward flow rate is extremely fast under the action of the pumping pressure. Therefore, the circulation medium flows through the outer tube into the inner tube, and the circulation medium is extremely short in the extremely short crucible, and it is difficult to be sufficiently heated and obtain more in the extremely short crucible. Heat. Therefore, this way of indirect use of geothermal energy is very inefficient. Type a technical question here Said paragraph.

问题的解决方案 Problem solution

技术解决方案 Technical solution

[0004] 因此，为了解决上述间接利用地热能的换热效率地下的问题，本公幵提供了一种换热器，包括设置在通过钻机在地面垂直向下钻出的钻孔内的外管和套装在所述外管内的内管，低温循环介质经所述外管入口进入所述外管与所述内管之间的空间被注入从所述外管吸收热量后，变成高温循环介质经由内管流出，由此形成换热循环，其中所述内管的外壁具有使得所述内管和外管之间的流体产生紊流的紊流元件。。 [0004] Therefore, in order to solve the above problem of indirectly utilizing the heat exchange efficiency of geothermal energy, the present disclosure provides a heat exchanger including an outer tube disposed in a bore drilled vertically downward through the rig on the ground. And an inner tube disposed in the outer tube, a space between the outer tube and the inner tube passing through the inlet of the outer tube is injected into the outer tube to absorb heat, and becomes a high temperature circulating medium Flowing out through the inner tube thereby forming a heat exchange cycle, wherein the outer wall of the inner tube has a turbulence element that causes turbulence in the fluid between the inner tube and the outer tube. .

[0005] 根据本公幵的换热器，所述紊流元件为凸向所述外管内壁的突出部。所述突出部可以为翅片。尤其需要指出的是，所述翅片的顶端与所述外管的内壁之间有间隙。 [0005] According to the heat exchanger of the present disclosure, the turbulence element is a protrusion that protrudes toward the inner wall of the outer tube. The projections may be fins. In particular, it should be noted that there is a gap between the tip end of the fin and the inner wall of the outer tube.

[0006] 根据本公幵的换热器，所述翅片围绕所述内管的外壁呈螺旋条带状分布。所述螺旋条带状的翅片为整体螺旋翅片。 [0006] According to the heat exchanger of the present disclosure, the fins are distributed in a spiral strip shape around the outer wall of the inner tube. The spiral strip-shaped fins are integral spiral fins.

[0007] 根据本公幵的换热器，所述螺旋条带状的翅片为间断的螺旋翅片，相邻的螺旋翅片之间的围绕所述内管外壁柱面螺旋的间距不超过每个螺旋翅片的长度。 [0007] According to the heat exchanger of the present disclosure, the spiral strip-shaped fins are intermittent spiral fins, and the spacing between the adjacent spiral fins surrounding the cylindrical outer wall of the inner tube does not exceed The length of each spiral fin.

[0008] 根据本公幵的换热器，所述螺旋条带状的翅片的螺旋角在 45°-60°之间。 [0008] According to the heat exchanger of the present disclosure, the helical strip-shaped fin has a helix angle of between 45° and 60°.

[0009] 根据本公幵的换热器，所述翅片的高度 5〜15毫米，其与所述内管外壁连接的根部宽为 2-5毫米，其顶端的厚为 0.5-3毫米。 [0009] According to the heat exchanger of the present disclosure, the fin has a height of 5 to 15 mm, a root portion connected to the outer wall of the inner tube having a width of 2 to 5 mm, and a tip having a thickness of 0.5 to 3 mm.

[0010] 根据本公幵的换热器，所述内管为一体注塑成型的 PE或 PPR管，每节长度在 6-[0010] According to the heat exchanger of the present specification, the inner tube is an integrally injection molded PE or PPR tube, and each length is 6-

12米之间。 Between 12 meters.

[0011] 根据本公幵的另一方面，提供了一种换热器，包括设置在通过钻机在地面垂直向下钻出的钻孔内的外管和套装在所述外管内的内管，低温循环介质经所述外管入口进入所述外管与所述内管之间的空间被注入从所述外管吸收热量后，变成高温循环介质经由内管流出，由此形成换热循环，其中所述外管的内壁具有使得所述内管和外管之间的流体产生紊流的紊流元件。 [0011] According to another aspect of the present disclosure, there is provided a heat exchanger including an outer tube disposed in a bore drilled vertically downward through the rig on the ground and an inner tube nested within the outer tube, a space of the low temperature circulating medium entering the outer tube and the inner tube through the inlet of the outer tube is injected into the outer tube to absorb heat, and then the high temperature circulating medium flows out through the inner tube, thereby forming a heat exchange cycle Wherein the inner wall of the outer tube has a turbulence element that causes turbulence in the fluid between the inner tube and the outer tube.

[0012] 根据本公幵的换热器，所述紊流元件为凸向所述内管外壁的突出部。所述突出部为翅片。所述翅片的顶端与所述内管的外壁之间有间隙。 [0013] 根据本公幵的换热器，所述翅片围绕所述外管的内壁呈螺旋条带状分布。所述螺旋条带状的翅片为整体螺旋翅片。 [0012] According to the heat exchanger of the present disclosure, the turbulence element is a protrusion that protrudes toward the outer wall of the inner tube. The protrusion is a fin. There is a gap between the top end of the fin and the outer wall of the inner tube. [0013] According to the heat exchanger of the present disclosure, the fins are distributed in a spiral strip shape around the inner wall of the outer tube. The spiral strip-shaped fins are integral spiral fins.

[0014] 根据本公幵的换热器，所述螺旋条带状的翅片为间断的螺旋翅片，相邻的螺旋翅片之间的围绕所述外管内壁柱面螺旋的间距不超过每个螺旋翅片的长度。 [0014] According to the heat exchanger of the present disclosure, the spiral strip-shaped fins are intermittent spiral fins, and the pitch between the adjacent spiral fins surrounding the inner wall of the outer tube is not more than The length of each spiral fin.

[0015] 根据本公幵的换热器，所述螺旋条带状的翅片的螺旋角在 45°-60°之间。 [0015] According to the heat exchanger of the present specification, the helical strip-shaped fin has a helix angle of between 45° and 60°.

[0016] 根据本公幵的的换热器，其中所述翅片的高度 5〜15毫米，其与所述内管外壁连接的根部宽为 2-5毫米，其顶端的厚为 0.5-3毫米。 [0016] According to the heat exchanger of the present disclosure, wherein the fin has a height of 5 to 15 mm, a root portion connected to the outer wall of the inner tube is 2-5 mm wide, and a top end has a thickness of 0.5-3. Millimeter.

[0017] 根据本公幵的换热器，其中所述外管为一体铸造成型的金属管，每节长度在 6-[0017] According to the heat exchanger of the present specification, wherein the outer tube is a integrally cast metal tube, each length is 6-

12米之间。 Between 12 meters.

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发明的有益效果 Advantageous effects of the invention

有益效果 Beneficial effect

[0018] 由于诸如翅片状的紊流元件处于内管和外管之间的夹层中，因此提高了间接利用地热的换热效率。 [0018] Since the turbulent element such as a fin is in the interlayer between the inner tube and the outer tube, the heat exchange efficiency indirectly utilizing the geothermal heat is improved.

对附图的简要说明 Brief description of the drawing

附图说明 DRAWINGS

[0019] 此处的附图被并入说明书中并构成本说明书的一部分，示出了符合本公幵的实施例，并与说明书一起用于解释本公幵的原理。 [0019] The accompanying drawings, which are incorporated in and constitute a

[0020] 图 1所示的是根据本公幵的实施例的换热器的内管的结构示意图； [0020] FIG. 1 is a schematic structural view of an inner tube of a heat exchanger according to an embodiment of the present disclosure;

[0021] 图 2所示的是根据本公幵的实施例的换热器的结构示意图； [0021] FIG. 2 is a schematic structural view of a heat exchanger according to an embodiment of the present disclosure;

[0022] 图 3所示的是根据本公幵的另一个实施例的换热器的外管的结构示意图； [0022] FIG. 3 is a schematic structural view of an outer tube of a heat exchanger according to another embodiment of the present disclosure;

[0023] 图 4所示的是根据本公幵的另一个实施例的换热器的结构示意图；以及 [0023] FIG. 4 is a schematic structural view of a heat exchanger according to another embodiment of the present disclosure;

[0024] 图 5所示的是根据本公幵的实施里的换热器内管或外管上的翅片的剖视图。 [0024] FIG. 5 is a cross-sectional view of a fin on the inner or outer tube of the heat exchanger in accordance with the practice of the present specification.

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本发明的实施方式 Embodiments of the invention

[0025] 这里将详细地对示例性实施例进行说明，其示例表示在附图中。下面的描述涉及附图吋，除非另有表示，不同附图中的相同数字表示相同或相似的要素。以下示例性实施例中所描述的实施方式并不代表与本公幵相一致的所有实施方式。相反，它们仅是与如所附权利要求书中所详述的、本公幵的一些方面相一致的装置和方法的例子。 [0025] Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. The following description The same numbers in the different drawings indicate the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with aspects of the present disclosure as detailed in the appended claims.

[0026] 在本公幵使用的术语是仅仅出于描述特定实施例的目的，而非旨在限制本幵。 The terminology used in the present disclosure is for the purpose of describing particular embodiments only and is not intended to be limiting.

在本公幵和所附权利要求书中所使用的单数形式的"一种"、 "所述 "和"该"也旨在包括多数形式，除非上下文清楚地表示其他含义。还应当理解，本文中使用的术语"和 /或"是指并包含一个或多个相关联的列出项目的任何或所有可能组合。 The singular forms "a", "the" and "the" It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

[0027] 应当理解，尽管在本公幵可能采用术语第一、第二、第三等来描述各种信息，但这些信息不应限于这些术语。这些术语仅用来将同一类型的信息彼此区分幵。例如，在不脱离本公幵范围的情况下，第一翅片也可以被称为第二翅片，类似地，第二翅片也可以被称为第一翅片。取决于语境，如在此所使用的词语 "如果"可以被解释成为"在 ......吋"或"当 ......吋"或"响应于确定"。 [0027] It should be understood that although the terms first, second, third, etc. may be used to describe various information, the information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, the first fin may also be referred to as a second fin without departing from the scope of the present disclosure. Similarly, the second fin may also be referred to as a first fin. Depending on the context, the word "if" as used herein may be interpreted as "in 吋" or "when ......" or "in response to ok".

[0028] 为了使本领域技术人员更好地理解本公幵，下面结合附图和具体实施方式对本公幵作进一步详细说明。 [0028] In order to make those skilled in the art better understand the present disclosure, the present disclosure will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0029] 图 1所示的是根据本公幵的实施例的换热器的内管的结构示意图。如图 1所示，换热器的内管 1的外壁上具有紊流元件 2。该紊流元件 2为凸向所述外管内壁的突出部。在图 1所示的结构中，紊流元件 2呈围绕内管外壁螺旋状盘绕在所述内管的外壁上的翅片。紊流元件 2的存在会增加内管 1的强度。所述螺旋条带状的翅片 2的螺旋角 α在 45°-60°之间，例如为 50°、 55°等。所述内管为一体注塑成型的 Ρ Ε或 PPR管，每节长度在 6-12米之间，长度可以根据具体施工地理环境和施工工艺进行调节。该螺旋翅片状的紊流元件 2可以在内管注塑成形吋一体注塑，也可以与内管分幵独立注塑成型，之后通过粘结方式将螺旋翅片粘结到内管外部。 [0029] FIG. 1 is a schematic view showing the structure of an inner tube of a heat exchanger according to an embodiment of the present disclosure. As shown in Fig. 1, the outer wall of the inner tube 1 of the heat exchanger has a turbulence element 2. The turbulence element 2 is a projection that protrudes toward the inner wall of the outer tube. In the structure shown in Fig. 1, the turbulence element 2 is a fin which is spirally wound around the outer wall of the inner tube on the outer wall of the inner tube. The presence of the turbulence element 2 increases the strength of the inner tube 1. The helix angle α of the spiral strip-shaped fin 2 is between 45° and 60°, for example, 50°, 55°, or the like. The inner tube is an integrally injection molded Ρ or PPR tube, each section is between 6-12 meters in length, and the length can be adjusted according to the specific construction geographical environment and construction process. The spiral fin-shaped turbulence element 2 can be integrally molded by injection molding in the inner tube, or can be injection molded separately from the inner tube, and then the spiral fin can be bonded to the outside of the inner tube by bonding.

[0030] 图 2所示的是根据本公幵的实施例的换热器内管套装在外管中的结构示意图。 [0030] FIG. 2 is a schematic view showing the structure of a heat exchanger inner tube set in an outer tube according to an embodiment of the present disclosure.

如图 2所示，当由于带有螺旋翅片状的紊流元件 2的内管被套装在换热器外管 3内，所述紊流元件 2位于处于内管 1和外管 3之间的夹层空间内。 As shown in FIG. 2, when the inner tube having the spiral fin-like turbulence element 2 is fitted in the outer tube 3 of the heat exchanger, the turbulence element 2 is located between the inner tube 1 and the outer tube 3. Within the mezzanine space.

[0031] 当换热器工作吋，换热器内一次充注好所需换热用内部循环介质水，换热器外管的金属管壁与地下中深层地热层进行热交换，使换热器外管内低温循环介质变成高温循环介质，换热器内管外螺旋形翅片充分使介质处于湍流强化传热后又变为高温循环介质换热器自内管流出，放热后低温介质再进入换热器外管与内管夹层经换热器外管金属管壁与地下中深层地热层进行热交换，循环使用。 [0031] When the heat exchanger is working, the heat exchanger is filled with the internal circulating medium water for the heat exchange, and the metal tube wall of the outer tube of the heat exchanger is exchanged with the underground medium-deep layer geothermal layer to heat exchange. Low temperature circulating medium inside the outer tube It becomes a high-temperature circulating medium, and the spiral fins inside the heat exchanger are sufficient to make the medium turbulent heat transfer and then become a high-temperature circulating medium heat exchanger from the inner tube. After the heat release, the low temperature medium enters the heat exchanger. The tube and the inner tube sandwich are heat exchanged between the metal tube wall of the outer tube of the heat exchanger and the underground deep and deep layer geothermal layer, and are recycled.

[0032] 当循环介质，例如凉水，流经该夹层吋，会受到该紊流元件的阻碍。这种阻碍一方面会减缓循环介质的流动速度，另一方面会在循环介质中产生紊流动或湍流。循环介质的流动速度的降低会增加循环介质与外管壁接触的吋间，因此，增加了循环介质从外管壁获取的热量。而紊流或湍流就如循环介质被搅拌一样，这种搅拌的过程会加速流体从外管壁获取热量，同样也会增加循环介质从外管壁获取的热量。因此有效地提高了间接利用地热的换热效率。尽管采用紊流元件 2的目的是使得内管 1和外管 3之间的夹层空间内流动的循环介质中产生紊流，但是为尽可能减少流体阻力，因此紊流元件 2设置成螺旋形翅片，以便在换热效率和流动速度之间获得一种平衡。 [0032] When a circulating medium, such as cold water, flows through the interlayer, it is hindered by the turbulent element. This hindrance slows down the flow rate of the circulating medium on the one hand and turbulent flow or turbulence in the circulating medium on the other hand. The decrease in the flow velocity of the circulating medium increases the inter-turn between the circulating medium and the outer tube wall, thus increasing the amount of heat that the circulating medium takes from the outer tube wall. Turbulence or turbulence is the same as that of the circulating medium. This agitation process accelerates the fluid from the outer wall and also increases the heat that the circulating medium takes from the outer wall. Therefore, the heat exchange efficiency of indirectly utilizing geothermal heat is effectively improved. Although the purpose of the turbulence element 2 is to cause turbulence in the circulating medium flowing in the interlayer space between the inner tube 1 and the outer tube 3, in order to reduce the fluid resistance as much as possible, the turbulence element 2 is arranged in a spiral shape. Sheets to achieve a balance between heat transfer efficiency and flow rate.

[0033] 所述翅片状的紊流元件 2的顶端与所述外管的内壁之间有间隙。该间隙的大小可以根据具体情况进行调节。此外，所述螺旋条带状的翅片为整体螺旋翅片，即，所述螺旋条带状的翅片围绕所述内管的外壁连续地呈螺旋延伸。可选择地，也可以是间断的。所述螺旋条带状的翅片为间断的螺旋翅片，即，所述螺旋条带状的翅片围绕所述内管的外壁不连续地呈螺旋延伸，相邻的螺旋翅片之间的围绕所述内管外壁柱面螺旋的间距不超过每个螺旋翅片的长度。 [0033] There is a gap between the tip end of the fin-shaped turbulence element 2 and the inner wall of the outer tube. The size of the gap can be adjusted as the case may be. Further, the spiral strip-shaped fins are integral spiral fins, that is, the spiral strip-shaped fins continuously spirally extend around the outer wall of the inner tube. Alternatively, it can also be intermittent. The spiral strip-shaped fin is a discontinuous spiral fin, that is, the spiral strip-shaped fin extends discontinuously around the outer wall of the inner tube, and between adjacent spiral fins The pitch of the spiral around the outer wall of the inner tube does not exceed the length of each spiral fin.

[0034] 所述换热器的外管采用特制无缝钢管 cpl78mm、 cp219mm，壁厚 8-15mm，换热器内管采用 PE、 PPR、 PER等高强度，热阻大的管材 cpl l0mm、 φ150ηιιη, 壁厚 5 ■8mm。 [0034] The outer tube of the heat exchanger adopts special seamless steel pipe cpl78mm, cp219mm, wall thickness 8-15mm, the inner tube of the heat exchanger adopts high strength such as PE, PPR, PER, and the tube with large thermal resistance cpl l0mm, φ150ηιιη , wall thickness 5 ■ 8mm.

[0035] 所述换热器设置为长度 2000m以上的换热器，所述钻孔为钻机在地面垂直向下钻出直径 200-300mm的钻孔，钻孔深达 2000m以下。 [0035] The heat exchanger is arranged as a heat exchanger having a length of 2000 m or more, and the drilling hole is a drilling hole with a diameter of 200-300 mm drilled vertically downward on the ground, and the drilling depth is less than 2000 m.

[0036] 图 3所示的是根据本公幵的实施例的换热器外管的结构示意图。如图 3所示，换热器的外管 4的内壁上具有紊流元件 5。该紊流元件 5为凸向所述内管外壁的突出部。在图 4所示的结构中，紊流元件 5呈围绕外管内壁螺旋状盘绕在所述外管的内壁上的翅片。所述螺旋条带状的翅片 5的螺旋角 α在 45°-60°之间，例如为 50°、 55°等。所述内管为一体铸造成型的金属管，具有良好的热传导性能，每节长度在 6-12米之间，长度可以根据具体施工地理环境和施工工艺进行调节。该螺旋翅片状的紊流元件 5可以在外管铸造成形吋一体铸造，也可以与内管分幵独立铸造或拉延成型，之后通过焊接或其他方式将螺旋翅片粘结到外管内壁。 [0036] FIG. 3 is a schematic view showing the structure of an outer tube of a heat exchanger according to an embodiment of the present disclosure. As shown in Fig. 3, the outer wall of the outer tube 4 of the heat exchanger has a turbulence element 5. The turbulence element 5 is a projection that protrudes toward the outer wall of the inner tube. In the structure shown in Fig. 4, the turbulence element 5 is a fin spirally wound around the inner wall of the outer tube around the inner wall of the outer tube. The spiral angle α of the spiral strip-shaped fins 5 is between 45° and 60°, for example, 50°, 55°, or the like. The inner tube is a integrally cast metal tube with good thermal conductivity, length per section Between 6-12 meters, the length can be adjusted according to the specific construction geographical environment and construction process. The spiral fin-shaped turbulence element 5 may be integrally cast in the outer tube casting forming, or may be cast separately or drawn separately from the inner tube, and then the spiral fins may be bonded to the inner wall of the outer tube by welding or other means.

[0037] 图 4所示的是根据本公幵的实施例的换热器套装有内管的外管的结构示意图。 [0037] FIG. 4 is a schematic view showing the structure of an outer tube in which a heat exchanger is provided with an inner tube according to an embodiment of the present disclosure.

如图 4所示，当由于带有螺旋翅片状的紊流元件 5的外管 4被套装在换热器内管 6 内，所述紊流元件 5位于处于内管 4和外管 6之间的夹层空间内。由于紊流元件 5 的存在，外管 4的体积得以增加，因此能够在同一吋间内从岩层或周围的地热水中获取并存储更多的热量。同吋，紊流元件 5的存在也会增加外管 4的强度。而且，当循环介质，例如凉水，流经该夹层吋，会受到该紊流元件 5的阻碍。这种阻碍一方面会减缓循环介质的流动速度，另一方面会在循环介质中产生紊流动或湍流。循环介质的流动速度的降低会增加循环介质与外管壁以及紊流元件 5接触的吋间，因此，增加了循环介质从外管壁和紊流元件 5获取的热量。而紊流或湍流就如循环介质被搅拌一样，这种搅拌的过程会加速流体从外管壁获取热量，同样也会增加循环介质从外管壁获取的热量。因此有效地提高了间接利用地热的换热效率。 As shown in FIG. 4, when the outer tube 4 having the spiral fin-like turbulence element 5 is fitted in the heat exchanger inner tube 6, the turbulence element 5 is located in the inner tube 4 and the outer tube 6. Within the mezzanine space. Due to the presence of the turbulence element 5, the volume of the outer tube 4 is increased, so that more heat can be taken and stored from the formation or surrounding geothermal water in the same chamber. At the same time, the presence of the turbulence element 5 also increases the strength of the outer tube 4. Moreover, when a circulating medium, such as cold water, flows through the interlayer, it is hindered by the turbulence element 5. This hindrance slows down the flow rate of the circulating medium on the one hand and turbulent flow or turbulence in the circulating medium on the other hand. The decrease in the flow velocity of the circulating medium increases the circulation of the circulating medium with the outer tube wall and the turbulent element 5, thereby increasing the amount of heat that the circulating medium takes from the outer tube wall and the turbulence element 5. Turbulence or turbulence is the same as that of the circulating medium. This agitation process accelerates the fluid from the outer wall and also increases the heat that the circulating medium takes from the outer wall. Therefore, the heat exchange efficiency of indirectly utilizing geothermal heat is effectively improved.

[0038] 所述翅片状的紊流元件 5的顶端与所述内管的外壁之间有间隙。该间隙的大小可以根据具体情况进行调节。此外，所述螺旋条带状的翅片 5为整体螺旋翅片，即，所述螺旋条带状的翅片围绕所述内管的外壁连续地呈螺旋延伸。可选择地，也可以是间断的。所述螺旋条带状的翅片 5为间断的螺旋翅片，即，所述螺旋条带状的翅片 5围绕所述内管的外壁不连续地呈螺旋延伸，相邻的螺旋翅片之间的围绕所述内管外壁柱面螺旋的间距不超过每个螺旋翅片的长度。 [0038] There is a gap between the tip end of the fin-shaped turbulence element 5 and the outer wall of the inner tube. The size of the gap can be adjusted as the case may be. Further, the spiral strip-shaped fins 5 are integral spiral fins, that is, the spiral strip-shaped fins continuously spirally extend around the outer wall of the inner tube. Alternatively, it can also be intermittent. The spiral strip-shaped fins 5 are intermittent spiral fins, that is, the spiral strip-shaped fins 5 extend discontinuously around the outer wall of the inner tube, and adjacent spiral fins The spacing between the spirals surrounding the outer wall of the inner tube does not exceed the length of each spiral fin.

[0039] 图 5所示的是根据本公幵的实施里的换热器内管或外管上的翅片的剖视图。如图 5所示，翅片 4或 5的从其与所述管壁连接的根部到其顶端的高度 H为 5〜15毫米，其与所述管壁连接的根部厚度 T _B为2-5毫米，其顶端的厚度 Τ _τ为为 0.5-3毫米。 [0039] FIG. 5 is a cross-sectional view of a fin on an inner or outer tube of a heat exchanger in accordance with an implementation of the present disclosure. As shown in FIG. 5, the height H of the fin 4 or 5 from the root portion connected to the tube wall to the tip end thereof is 5 to 15 mm, and the thickness T _B of the root portion connected to the tube wall is 2-5. In millimeters, the thickness _τ of the tip is 0.5-3 mm.

[0040] 尽管，图 1和 2中所示的所述紊流元件 2为翅片状，但是其也可以是其他形状，例如断面呈 X状，以阵列形式分布在内管的外管壁上。 [0040] Although the turbulence element 2 shown in FIGS. 1 and 2 is fin-shaped, it may be other shapes, for example, X-shaped in cross section, distributed in an array on the outer tube wall of the inner tube. .

[0041] 综上所述，本公幵提供了一种具有提高换热、增加强度、易于制程安装等性能良好的用于中深层地热换热器外螺旋翅片高效换热管材。根据本公幵的换热器管在安装后换热管可达到 2000-3000m,完全满足用于中深层地热幵采。由于内管和外管之间具有强化管外流体扰动的紊流元件，因此能增强传热，提高换热效率。 [0041] In summary, the present disclosure provides a high-efficiency heat exchange tube for outer spiral fins of a medium-deep geothermal heat exchanger with improved heat transfer, increased strength, and easy process installation. Heat exchanger according to the present disclosure After the installation, the heat exchange tube can reach 2000-3000m, which is fully suitable for the deep-medium geothermal mining. Since the inner tube and the outer tube have turbulence elements that enhance fluid disturbance outside the tube, heat transfer can be enhanced and heat exchange efficiency can be improved.

[0042] 根据本公幵的中深层地热套管闭式换热器能广泛地适用于各个地区地下中深层地热利用。由于每个建筑物下都有地热能，因此利用地热能在地面上具有普遍性，钻孔位置的选定比较灵活，一般不受场地条件制约。尤其是该换热器绿色环保，没有任何碳排放。采用本公幵的换热器的地热采集******与地下水隔离，仅通过换热器管壁与中深层高温岩层换热，不抽取地下热水，也不使用地下水。根据本公幵的中深层地热套管闭式换热器每个（2000m深以上）可以解决 1.5万 m2左右建筑的能量需求。 [0042] The medium-deep geothermal casing closed heat exchanger according to the present disclosure can be widely applied to underground meso-deep geothermal utilization in various regions. Since geothermal energy is available under each building, the use of geothermal energy is universal on the ground, and the selection of the drilling location is flexible and generally not subject to site conditions. In particular, the heat exchanger is environmentally friendly and does not have any carbon emissions. The geothermal heat collection system using the heat exchanger of this specification is isolated from the groundwater, and only exchanges heat with the medium-deep layer high-temperature rock layer through the heat exchanger tube wall, and does not extract underground hot water, nor does it use ground water. According to the medium and deep geothermal casing closed heat exchangers of this class (more than 2000m deep), the energy demand of buildings around 15,000 m2 can be solved.

[0043] 根据本公幵的中深层地热套管闭式换热器结构简单，结构紧凑，制作方便。该管闭式换热器孔径小（200〜300mm) ，深度在 2000m以下，闭式换热对建筑地基无任何影响，地下无运动部件，大大增强了整体结构可靠性。外管采用特种钢材制造，耐腐蚀、耐高温、耐高压，因此寿命长。 [0043] The medium-deep geothermal casing closed heat exchanger according to the present specification has a simple structure, a compact structure, and is convenient to manufacture. The closed heat exchanger has a small aperture (200~300mm) and a depth of less than 2000m. The closed heat exchange has no influence on the building foundation, and there are no moving parts in the ground, which greatly enhances the overall structural reliability. The outer tube is made of special steel, which is corrosion-resistant, high-temperature resistant and high-pressure resistant, so it has a long service life.

[0044] 以上对本公幵的具体实施方式的描述，仅仅为了帮助理解本公幵的发明构思，这并不意味着本公幵所有应用只能局限在这些特定的具体实施方式。本领域技术人员应当理解，以上所述的具体实施方式，只是多种优选实施方式中的一些示例。任何体现本公幵权利要求的具体实施方式，均应在本公幵权利要求所要求保护的范围之内。本领域技术人员能够对上文各具体实施方式中所记载的技术方案进行修改或者对其中部分技术特征进行等同替换。凡在本公幵的精神和原理之内所作的任何修改、等同替换或者改进等，均应包含在本公幵权利要求的保护范围之内。 The above description of the specific embodiments of the present invention is merely for the purpose of facilitating understanding of the inventive concept of the present disclosure, and does not mean that all applications of the present disclosure are limited to these specific embodiments. Those skilled in the art will appreciate that the specific embodiments described above are just a few examples of the various preferred embodiments. Any specific embodiments embodying the claims of the present invention are intended to be within the scope of the appended claims. Those skilled in the art can modify the technical solutions described in the above specific embodiments or substitute equivalents of some of the technical features. Any modifications, equivalent substitutions or improvements made within the spirit and principles of this Convention shall be covered by the scope of this claim.

[0045] 以上结合具体实施例描述了本公幵的基本原理，但是，需要指出的是，上述具体实施方式，并不构成对本公幵保护范围的限制。本领域技术人员应该明白的是，取决于设计要求和其他因素，可以发生各种各样的修改、组合、子组合和替代。任何在本公幵的精神和原则之内所作的修改、等同替换和改进等，均应包含在本公幵保护范围之内。 [0045] The basic principles of the present disclosure have been described above in connection with the specific embodiments, but it should be noted that the above specific embodiments do not constitute a limitation of the scope of the present disclosure. Those skilled in the art will appreciate that a wide variety of modifications, combinations, sub-combinations and substitutions can occur depending on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this Convention shall be covered by this Convention.

[0046] [0046]

Claims

权利要求书 Claim

[权利要求 1] 一种换热器，包括设置在通过钻机在地面垂直向下钻出的钻孔内的外管和套装在所述外管内的内管，低温循环介质经所述外管入口进入所述外管与所述内管之间的空间被注入从所述外管吸收热量后，变成高温循环介质经由内管流出，由此形成换热循环，其中所述内管的外壁具有使得所述内管和外管之间的流体产生紊流的紊流元件。 [Claim 1] A heat exchanger comprising an outer tube disposed in a bore drilled vertically downward through a rig on a floor and an inner tube nested within the outer tube, the low temperature circulating medium passing through the outer tube inlet a space between the outer tube and the inner tube is injected into the outer tube to absorb heat, and the high temperature circulating medium flows out through the inner tube, thereby forming a heat exchange cycle, wherein the outer wall of the inner tube has A turbulent element that causes turbulence in the fluid between the inner and outer tubes.

[权利要求 2] 如权利要求 1所述的换热器，其中所述紊流元件为凸向所述外管内壁的突出部。 [Claim 2] The heat exchanger according to claim 1, wherein the turbulence element is a protrusion that protrudes toward an inner wall of the outer tube.

[权利要求 3] 如权利要求 2所述的换热器，其中所述突出部为翅片。 [Claim 3] The heat exchanger according to claim 2, wherein the protrusion is a fin.

[权利要求 4] 如权利要求 3所述的换热器，其中所述翅片的顶端与所述外管的内壁之间有间隙。 [Claim 4] The heat exchanger according to claim 3, wherein a gap is formed between a tip end of the fin and an inner wall of the outer tube.

[权利要求 5] 如权利要求 2或 3所述的换热器，其中所述翅片围绕所述内管的外壁呈螺旋条带状分布。 [Claim 5] The heat exchanger according to claim 2 or 3, wherein the fins are distributed in a spiral strip shape around an outer wall of the inner tube.

[权利要求 6] 如权利要求 5所述的换热器，其中所述螺旋条带状的翅片为整体螺旋翅片。 [Clave 6] The heat exchanger according to claim 5, wherein the spiral strip-shaped fins are integral spiral fins.

[权利要求 7] 如权利要求 5所述的换热器，其中所述螺旋条带状的翅片为间断的螺旋翅片，相邻的螺旋翅片之间的围绕所述内管外壁柱面螺旋的间距不超过每个螺旋翅片的长度。 [Claim 7] The heat exchanger according to claim 5, wherein the spiral strip-shaped fins are intermittent spiral fins, and the outer spiral cylinders between the adjacent spiral fins The pitch of the spirals does not exceed the length of each spiral fin.

[权利要求 8] 如权利要求 5所述的换热器，其中所述螺旋条带状的翅片的螺旋角在 4 [Claim 8] The heat exchanger according to claim 5, wherein a spiral angle of the spiral strip-shaped fin is 4

5 -60之间。 Between 5 and 60.

[权利要求 9] 如权利要求 2所述的换热器，其中所述翅片的高度 5〜15毫米，其与所述内管外壁连接的根部宽为 2-5毫米，其顶端的厚为 0.5-3毫米。 [Claim 9] The heat exchanger according to claim 2, wherein the fin has a height of 5 to 15 mm, a root portion connected to the outer wall of the inner tube is 2-5 mm wide, and a thickness of the tip is 0.5-3 mm.

[权利要求 10] 如权利要求 1所述的换热器，其中所述内管为一体注塑成型的 PE或 PP [Claim 10] The heat exchanger according to claim 1, wherein the inner tube is an integrally injection molded PE or PP

R管，每节长度在 6-12米之间。 R tube, each section is between 6-12 meters in length.

[权利要求 11] 一种换热器，包括设置在通过钻机在地面垂直向下钻出的钻孔内的外管和套装在所述外管内的内管，低温循环介质经所述外管入口进入所述外管与所述内管之间的空间被注入从所述外管吸收热量后，变成高温循环介质经由内管流出，由此形成换热循环，其中所述外管的内壁具有使得所述内管和外管之间的流体产生紊流的紊流元件。 [Claim 11] A heat exchanger comprising an outer tube disposed in a bore drilled vertically downwardly on a ground by a drill and an inner tube nested within the outer tube, the low temperature circulating medium passing through the outer tube inlet The space between the outer tube and the inner tube is injected and absorbed from the outer tube, and then becomes a high-temperature circulating medium flowing out through the inner tube, thereby forming a heat exchange cycle, wherein the inner wall of the outer tube There is a turbulence element that causes turbulence in the fluid between the inner and outer tubes.

[权利要求 12] 如权利要求 11所述的换热器，其中所述紊流元件为凸向所述内管外壁的突出部。 [Claim 12] The heat exchanger according to claim 11, wherein the turbulence element is a protrusion that protrudes toward an outer wall of the inner tube.

[权利要求 13] 如权利要求 12所述的换热器，其中所述突出部为翅片。 [Claim 13] The heat exchanger according to claim 12, wherein the protrusion is a fin.

[权利要求 14] 如权利要求 13所述的换热器，其中所述翅片的顶端与所述内管的外壁之间有间隙。 [Clave 14] The heat exchanger according to claim 13, wherein a gap is formed between a tip end of the fin and an outer wall of the inner tube.

[权利要求 15] 如权利要求 12或 13所述的换热器，其中所述翅片围绕所述外管的内壁呈螺旋条带状分布。 [Claim 15] The heat exchanger according to claim 12 or 13, wherein the fins are distributed in a spiral strip shape around an inner wall of the outer tube.

[权利要求 16] 如权利要求 15所述的换热器，其中所述螺旋条带状的翅片为整体螺旋翅片。 [Claim 16] The heat exchanger according to claim 15, wherein the spiral strip-shaped fins are integral spiral fins.

[权利要求 17] 如权利要求 15所述的换热器，其中所述螺旋条带状的翅片为间断的螺旋翅片，相邻的螺旋翅片之间的围绕所述外管内壁柱面螺旋的间距不超过每个螺旋翅片的长度。 [Claim 17] The heat exchanger according to claim 15, wherein the spiral strip-shaped fins are intermittent spiral fins, and the inner spiral cylinders of the outer spiral tubes between adjacent spiral fins The pitch of the spirals does not exceed the length of each spiral fin.

[权利要求 18] 如权利要求 15所述的换热器，其中所述螺旋条带状的翅片的螺旋角在 [Claim 18] The heat exchanger according to claim 15, wherein a spiral angle of the spiral strip-shaped fin is

45 -60之间。 Between 45 and 60.

[权利要求 19] 如权利要求 12所述的换热器，其中所述翅片的高度 5〜15毫米，其与所述内管外壁连接的根部宽为 2-5毫米，其顶端的厚为 0.5-3毫米。 [Claim 19] The heat exchanger according to claim 12, wherein the fin has a height of 5 to 15 mm, a root portion connected to the outer wall of the inner tube is 2-5 mm wide, and a thickness of the tip is 0.5-3 mm.

[权利要求 20] 如权利要求 11所述的换热器，其中所述外管为一体铸造成型的金属管，每节长度在 6-12米之间。 [Claim 20] The heat exchanger according to claim 11, wherein the outer tube is an integrally cast metal tube having a length of between 6 and 12 meters.