阅读说明：本技术 液流电池换热装置及安装换热装置的方法 (Heat exchange device for flow battery and method for mounting heat exchange device ) 是由 黄涛 余龙海 于 2020-12-29 设计创作，主要内容包括：本发明涉及散热领域,提供一种液流电池换热装置(22)及安装换热装置方法,装置(22)包括毛细管架,其为长形,长度适于竖直设置在液流电池的储液罐(21)内；多根毛细管(221),布设于所述毛细管架；至少一对连接组件(222),设置在所述换热装置(22)的上端,每对连接组件(222)分别将所述毛细管(221)的进液端和出液端固定连接至所述储液罐(21)的上部,实现该毛细管(221)与外部的流体连通。本装置采用换热装置内置的方式,能够减小空间的占用,且易于安装和拆卸。(The invention relates to the field of heat dissipation, and provides a flow battery heat exchange device (22) and a method for mounting the heat exchange device, wherein the device (22) comprises a capillary tube frame which is long and is suitable for being vertically arranged in a liquid storage tank (21) of a flow battery; a plurality of capillary tubes (221) arranged in the capillary tube frame; and at least one pair of connecting assemblies (222) is arranged at the upper end of the heat exchange device (22), and each pair of connecting assemblies (222) is used for fixedly connecting the liquid inlet end and the liquid outlet end of the capillary tube (221) to the upper part of the liquid storage tank (21) respectively so as to realize the fluid communication between the capillary tube (221) and the outside. The device adopts a built-in mode of the heat exchange device, can reduce the occupation of space, and is easy to install and disassemble.)

1. A heat exchange device (22) for a flow battery, comprising:

the capillary tube frame is long and is suitable for being vertically arranged in a liquid storage tank (21) of the flow battery;

a plurality of capillary tubes (221) arranged in the capillary tube frame;

and at least one pair of connecting assemblies (222) is arranged at the upper end of the heat exchange device (22), and each pair of connecting assemblies (222) is used for fixedly connecting the liquid inlet end and the liquid outlet end of the capillary tube (221) to the upper part of the liquid storage tank (21) respectively so as to realize the fluid communication between the capillary tube (221) and the outside.

2. The heat exchange device according to claim 1, wherein the capillary tube holder comprises a plurality of porous plates (227), and the capillary tubes (221) are arranged on the porous plates (227) in a penetrating manner.

3. The heat exchange device according to claim 1, further comprising an outer wall (224) surrounding the capillary tube holder, wherein the outer wall (224) is provided with a plurality of first through holes (225) for the electrolyte to enter.

4. The heat exchange device according to claim 1, further comprising a fixing flange (223) arranged at the top of the capillary frame and used for being fixedly connected with the top of the liquid storage tank (21).

5. The heat exchange device according to claim 5, further comprising a fixing flange (223) arranged at the bottom of the capillary tube frame and used for being fixedly connected with the bottom of the liquid storage tank (21).

6. A heat exchange device according to claim 1, wherein each pair of connection assemblies (222) comprises a capillary tube joint (222A), an external wire joint (222B) and 2 lap joint half flanges (222C), wherein:

the capillary joint (222A) comprises an upper part and a lower part, the lower part is used for receiving the liquid inlet end or the liquid outlet end of the capillary (221), the inner wall of the upper part is of an internal thread structure,

the outer thread joint (222B) is provided with external threads on the outer wall of the lower part and matched with the internal threads of the capillary joint (222A); the upper part of the capillary joint (222A) is provided with an enlarged part;

the loop half flange (222C) is processed with a stepped hole, and the stepped hole is clamped on the enlarged part of the capillary joint (222A) after the loop half flange is encircled.

7. The heat exchange device according to claim 6, wherein the top of the capillary fitting (222A) is provided with a groove, and the connection assembly (222) further comprises an O-ring (222D), the O-ring (222D) being provided on the groove for sealing between the capillary fitting (222A) and the external wire fitting (222B).

8. The flow battery heat exchange device of claim 6, wherein the connection assembly (222) further comprises a gasket (222E) disposed on a lower end surface of the loop half flange (222C) for sealing the lower end surface of the loop half flange (222C) with the fluid reservoir (21).

9. A method of installing the heat exchange device of any one of claims 1-8 in a flow battery reservoir, comprising: the heat exchange device (22) is vertically arranged in the liquid storage tank (21), and the at least one pair of connecting assemblies (222) are respectively connected to a liquid inlet and a liquid outlet at the top of the liquid storage tank (21).

10. Method for mounting a heat exchanger device according to claim 4 or 5 in a flow battery reservoir, wherein a reservoir fixing flange (214) is provided at a corresponding position of the reservoir (21) for abutting against a fixing flange (223) at the top or bottom of the capillary frame.

11. The method for installing the heat exchange device of claim 6 in a liquid flow battery liquid storage tank, wherein a cooling water inlet flange (212) and a cooling water outlet flange (213) are arranged at corresponding positions of the liquid storage tank (21), and the pair of capillary connectors respectively penetrate out of the liquid storage tank (21) from the cooling water inlet flange (212) and the cooling water outlet flange (213) and are connected in a sealing manner.

12. Method of installing the heat exchange device of claim 11 in a flow battery reservoir, wherein the two loose-end flanges (222C) grip the capillary fitting (222A) and are removably secured over the cooling water inlet flange (212) or the cooling water outlet flange (213).

13. The method of claim 12, wherein the tank mounting flange (214) is provided with a plurality of second through holes (215).

Technical Field

The invention relates to the field of heat dissipation, in particular to a flow battery heat exchange device and a method for installing the heat exchange device.

Background

In recent years, wind power generation and photovoltaic power generation are developed at a high speed, the wind-solar power generation grid-connected specification is increased, and due to the characteristics of intermittency and randomness of wind-solar power generation, the stability of a power grid in a certain area is influenced by large-scale wind-solar power generation grid connection. The electric energy storage technology is one of the key links in the field of new energy access, and can effectively make up for the intermittent and fluctuating defects of wind and light power generation. Among them, the energy storage of the all-vanadium redox flow battery has the advantages of safe operation, long cycle life, suitability for large-scale energy storage, environmental protection and the like, and recently, the attention is increasingly paid.

The power and the capacity of the vanadium battery are independent of each other, the battery power depends on the power of the electric pile, and the battery energy is stored in the electrolyte. Therefore, the electrolyte is the core of the all-vanadium liquid flow energy storage system. Vanadium battery energy storage systems require both high concentration electrolyte solutions to achieve high energy density of the battery, high stability and high electrochemical activity to achieve high rate discharge characteristics, voltage efficiency, energy efficiency and low maintenance costs. In practical application, along with the progress of charging and discharging, the temperature of the electrolyte can continuously rise, the performance of the electrolyte and the battery is greatly influenced by temperature factors, along with the rise of the temperature of the electrolyte, the viscosity of the electrolyte can be reduced, the fluidity and the activity are enhanced, and the charging and discharging efficiency of a system can be improved. However, when the temperature is too high and the pentavalent vanadium reaches a certain concentration, vanadium pentoxide crystals are separated out to cause the blockage of a flow channel, so that the performance of the battery is rapidly deteriorated until the battery is invalid, and therefore, the effective control of the temperature of the system is very critical in the charging and discharging processes.

When the all-vanadium redox flow energy storage battery works, ions with two valence states V (IV) and V (V) are generated at the positive electrode, ions with two valence states V (II) and V (III) are generated at the negative electrode, and the stability of the ions with different valence states is different at a certain temperature. In the galvanic pile, the positive and negative electrolytes have cross permeation, so that thermal reaction can be involved in the reaction process, and particularly, the heating of the galvanic pile is more obvious in the discharging process. The temperature change affects not only the stability of the electrolyte itself but also the electrochemical reaction of the electrode active material on the electrode, thereby affecting the battery performance.

At present, two heat exchange modes commonly used by the flow battery comprise a water cooling mode and an air cooling mode, and a water cooling circulating heat exchange device and an air cooling circulating heat exchange device exchange heat with high-temperature electrolyte through cooling water or cold air to achieve the effect of cooling. On the premise that the heat exchange areas of the heat exchangers are the same, the water cooling heat exchange effect is obviously superior to the air cooling effect. In practical application, the water-cooling heat exchanger is generally external, and in order to cool down the electrolyte in the storage tank, a pipeline is additionally arranged outside the storage tank and connected with the heat exchanger, or the heat exchanger is connected in series in the pipeline, so that the occupied space and the power consumption of a pump are increased, and the heat exchange cost is greatly increased.

As shown in fig. 1, fig. 1 is a general installation diagram of a combined heat exchanger 1, and a manhole 111 for installation and maintenance is machined at the top or side of a manufactured storage tank 11. The heat exchanger 12 having a large diameter cannot be placed in the storage tank 11 after being manufactured. Therefore, the heat exchanger 12 is usually processed into a multi-circular arc combined structure, the frame of the multi-circular arc heat exchanger 12 is put into the storage tank manhole 111, and then the frame is spliced inside the storage tank 12, and the capillary tube is wound inside the storage tank 11, thereby completing the assembly of the heat exchanger 12 inside the storage tank 11. The combined heat exchanger 1 is very inconvenient to install and maintain.

Chinese patent application No. CN201821297562.7 discloses a heat exchange storage tank for an all-vanadium redox flow battery system, which is a jacketed heat exchange storage tank, comprising an outer barrel and an inner barrel containing electrolyte, wherein the inner barrel is installed in the outer barrel, a jacket layer is arranged between the inner barrel and the outer barrel, a heat exchange medium inlet and outlet communicated with the jacket layer are arranged on the outer barrel wall, the jacket layer is an inner barrel wall, an outer barrel wall, a barrel bottom wall and a cover plate form a closed space for isolating the inner barrel and the outer barrel, the jacket layer is divided into a plurality of relatively independent flow blocking partitions by flow blocking plates, and clearance holes enabling a heat medium to flow between different flow blocking partitions are opened on the flow blocking plates, and the cooling medium is water. The cold and hot media are not in direct contact, the aim of cooling the electrolyte is actually achieved by cooling the wall of the inner barrel through cooling water, the electrolyte is corrosive, the used storage tank is generally made of corrosion-resistant PP, PPH, PE and other plastic materials, and the materials have poor heat dissipation effect, so the heat dissipation effect of the mode is poor. And the jacket type storage tank structure has small effective volume of the storage tank, large manufacturing process difficulty and high manufacturing cost.

Chinese patent application No. CN201720664886.9 discloses a heat exchanger for heteropolyacid distillation reation kettle, this heat exchanger is the built-in heat exchanger in reation kettle, including the reation kettle wall, the internally mounted of reation kettle wall has the capillary pipe support, the capillary pipe support forms through horizontal frame and vertical frame combination, evenly distributed has a plurality of holes on the capillary pipe support, downthehole capillary of passing, multiunit capillary hole evenly spaced coils respectively on the capillary pipe support to form steam outlet and steam inlet at its both ends. The method for installing the built-in heat exchanger needs to fix a plurality of capillary tube frames in the reaction kettle, then a plurality of groups of capillary tubes penetrate through holes in the capillary tube frames at equal intervals, and the process of coiling the capillary tubes needs to be carried out by people in the reaction kettle, so that the method is very inconvenient. In case the heat exchanger goes wrong when needing the maintenance, then can't take out the heat exchanger, and the capillary tube support of this kind of heat exchanger is modular structure, needs professional to go the on-the-spot assembling in reation kettle inside reation kettle of reation kettle manufacturer or will make good reation kettle transport to the heat exchanger producer and assemble by professional in reation kettle inside, can bring a great deal of inconvenience for production.

Therefore, the invention is needed to provide a heat exchange device for a flow battery, which can improve the heat dissipation effect and is convenient to install and maintain.

Disclosure of Invention

The technical purpose of the invention is to solve the defects of the prior art, and provide a flow battery heat exchange device and a method for installing the heat exchange device, which can obviously improve the heat dissipation effect, reduce the occupied volume of the heat exchange device, and facilitate installation and maintenance.

As a first aspect of the present invention, the present invention provides a flow battery heat exchange device, including:

the capillary tube frame is long and suitable for being vertically arranged in a liquid storage tank of the flow battery;

a plurality of capillaries arranged on the capillary tube frame;

at least one pair of connecting components are arranged at the upper end of the heat exchange device, and each pair of connecting components are respectively used for fixedly connecting the liquid inlet end and the liquid outlet end of the capillary tube to the upper part of the liquid storage tank so as to realize the communication between the capillary tube and external fluid.

According to an exemplary embodiment of the invention, the capillary support comprises a plurality of perforated plates, through which the capillaries are arranged.

According to an exemplary embodiment of the present invention, the heat exchange device further includes an outer wall surrounding the capillary tube frame, and the outer wall is provided with a plurality of first through holes for electrolytic solution to enter.

According to an exemplary embodiment of the present invention, the heat exchanging device further includes a fixing flange disposed at a top of the capillary frame, for being fixedly connected to a top of the liquid storage tank.

According to an exemplary embodiment of the present invention, the heat exchanging device further includes a fixing flange disposed at the bottom of the capillary tube rack, and the fixing flange is used for being fixedly connected with the bottom of the liquid storage tank.

According to an exemplary embodiment of the invention, each pair of connection assemblies comprises a capillary connection, an external thread connection and two lap joint half-flanges, wherein:

the capillary joint comprises an upper part and a lower part, the lower part is used for bearing the liquid inlet end or the liquid outlet end of the capillary, the inner wall of the upper part is of an internal thread structure,

the outer wall of the lower part of the external thread joint is provided with an external thread which is matched with the internal thread of the capillary joint; the upper part of the capillary joint is provided with an expanding part;

the half flange of the loop is provided with a step hole which is clamped on the enlarged part of the capillary joint after the loop is encircled.

According to an example embodiment of the present invention, a groove is formed at a top of the capillary joint, and the connection assembly further includes an O-ring disposed on the groove for sealing between the capillary joint and the external thread joint.

According to an example embodiment of the present invention, the connection assembly further includes a gasket disposed on a lower end surface of the loop half flange, for sealing between the lower end surface of the loop half flange and the liquid storage tank.

According to a second aspect of the invention, the invention provides a method for installing the heat exchange device in a flow battery liquid storage tank, the heat exchange device is vertically arranged in the liquid storage tank, and the at least one pair of connecting assemblies are respectively connected to a liquid inlet and a liquid outlet on the top of the liquid storage tank.

According to an exemplary embodiment of the present invention, a liquid storage tank fixing flange is provided at a corresponding position of the liquid storage tank for abutting against the fixing flange at the top and/or bottom of the capillary frame.

According to an exemplary embodiment of the present invention, a cooling water inlet flange and a cooling water outlet flange are disposed at corresponding positions of the liquid storage tank, and the pair of capillary joints respectively penetrate out of the liquid storage tank from the cooling water inlet flange and the cooling water outlet flange and are hermetically connected.

According to an exemplary embodiment of the invention, the two loop half-flanges clamp the capillary connection and are detachably fixed above the cooling water inlet flange or the cooling water outlet flange.

According to an exemplary embodiment of the present invention, the tank fixing flange is provided with a plurality of second through holes.

The invention has the beneficial effects that:

the heat exchange device for the redox flow battery provided by the invention solves the problem of heat dissipation of the electrolyte of the vanadium redox battery, and has the following advantages.

(1) The mode that adopts heat transfer device to embed can reduce the occupation of space, does not increase the flow resistance loss of redox flow battery electrolyte.

(2) The heat exchange device is an integral body, can be conveniently installed and detached with the liquid storage tank, and is convenient to maintain.

(3) When the heat exchange device is installed, the whole heat exchange device is placed into the liquid storage tank, the capillary tube joint penetrates out from the corresponding flange at the top of the liquid storage tank from inside to outside, and the loop half flange is fixed on the flange at the top of the liquid storage tank.

(4) The O-shaped ring and the sealing ring are arranged, so that the sealing effect is good.

(5) The heat exchange device does not need extra pumps and pipelines, and does not need to be connected in series into a pipeline of the system, and a tap water pipe is directly connected to an inlet connector of the heat exchange device.

(6) The heat exchange device adopts a fluoroplastic heat exchange device, and has good high temperature resistance, aging resistance and corrosion resistance.

(7) Compared with a heat exchange mode of making an interlayer outside the storage tank, the built-in heat exchange device has the advantages of simple manufacturing process and low manufacturing cost.

Drawings

FIG. 1 is a block diagram of a prior art combination heat exchanger;

FIG. 2 is a structural diagram showing a combined structure of a liquid storage tank and a heat exchange device of a first embodiment;

FIG. 3 is a block diagram illustrating a fluid reservoir tank of a first embodiment;

FIG. 4 is a structural view showing a heat exchange apparatus according to a first embodiment;

FIG. 5 is a schematic view of a perforated plate of a capillary tube holder according to an embodiment of the invention;

FIG. 6 is a diagram showing the connection of the capillary tube and the connection assembly according to the first embodiment;

FIG. 7 is an exploded view of FIG. 6;

FIG. 8 is a view showing a structure of a capillary joint of the first embodiment;

FIG. 9 is a block diagram of a first embodiment of a lap joint half-flange;

FIG. 10 is a structural view showing a combined structure of a liquid storage tank and a heat exchange device of a second embodiment.

The system comprises a combined heat exchange device 1, a combined heat exchange device 11, a storage tank 111, a manhole 12, a heat exchange device 2, a liquid storage tank and heat exchange device combined structure 21, a liquid storage tank 211, a manhole 212, a cooling water inlet flange 213, a cooling water outlet flange 214, a liquid storage tank fixing flange 215, a second through hole 216, an electrolyte outlet flange 217, an electrolyte inlet flange 218, a transparent observation pipe fixing flange 22, a heat exchange device 22, a capillary tube 221, a connecting assembly 222, a capillary tube joint 222A, an external wire joint 222B, a loose half flange 222C, a loose half flange 222D-O-shaped ring 222E-sealing gasket 223, a heat exchange device fixing flange 224, an outer wall 225, a first through hole 225, a third through hole 226, a porous plate 227, and a transparent observation pipe 23.

Detailed Description

The following detailed description of embodiments of the invention, but the invention can be practiced in many different ways, as defined and covered by the claims.

According to a first embodiment of the invention, as shown in fig. 2, a combined structure 2 of a liquid storage tank and a heat exchange device is provided, which can be used in occasions requiring heat exchange, such as the field of all-vanadium redox flow batteries, for exchanging heat for electrolyte in the liquid storage tank; but also in the fields of chemical industry, energy and the like which need water cooling and heat exchange. The combined liquid storage tank and heat exchange device structure 2 comprises a liquid storage tank 21, a heat exchange device 22 and a transparent observation tube 23. The heat exchange device 22 may be provided in plurality as necessary.

As shown in fig. 3, the liquid storage tank 21 includes a manhole 211, a cooling water inlet flange 212, a cooling water outlet flange 213, a storage tank fixing flange 214, a second through hole 215, an electrolyte outlet flange 216, an electrolyte inlet flange 217, and a transparent observation tube fixing flange 218. A manhole 211 is provided at the top of the storage tank 21, and the heat exchanging device 22 is put into the storage tank 21 through the manhole 211. The cooling water inlet flange 212 and the cooling water outlet flange 213 are disposed at the top of the liquid storage tank 21, and respectively correspond to the liquid inlet and the liquid outlet at the top of the liquid storage tank 21, and are used for allowing the liquid inlet end and the liquid outlet end of the capillary 221 of the heat exchange device 22 to penetrate through the liquid storage tank 21. The top and the bottom of the inner wall of the liquid storage tank 21 are both fixed with a liquid storage tank fixing flange 214, and the liquid storage tank fixing flange 214 is provided with a plurality of second through holes 215. The second through hole 215 is a kidney-shaped hole, which can prevent the electrolyte from entering the cavity of the liquid storage tank fixing flange 214 to form 'dead liquid'. The electrolyte outlet flange 216 is provided in plurality and is provided at the top of the reservoir tank 21. The electrolyte inlet flange 217 is provided in plurality and is provided at the bottom of the reservoir tank 21. When the heat exchange device 22 is used, the heat exchange device 22 is firstly placed into the liquid storage tank 21 and installed, electrolyte is added into the liquid storage tank 21 for reaction, and the heat exchange device 22 is soaked in the electrolyte. Transparent viewing tube mounting flange 218 is coupled to transparent viewing tube 23 for allowing a worker to view the interior of tank 21 from the exterior.

As shown in FIG. 4, the heat exchanger 22 is a cylindrical structure with a height suitable for being vertically arranged in the liquid storage tank 21, and the structure of the heat exchanger can be adjusted as required. The heat exchange device 22 comprises a plurality of capillary tubes 221, two pairs of connecting assemblies 222, a heat exchange device fixing flange 223, a capillary tube frame and an outer wall 224, wherein the capillary tube frame, the heat exchange device fixing flange 223, the outer wall 224 and the loop half flange 222C are made of PP materials, the capillary tubes 221 and the capillary tube joints 222A are made of fluoroplastic materials, and the fluoroplastic materials have good high temperature resistance, aging resistance and corrosion resistance. The top of the capillary frame is provided with a circular third through hole 226 for the capillary 221 to pass through, and the top of the capillary frame is also fixedly connected with a heat exchange device fixing flange 223. The heat exchanger fixing flange 223 is fixedly connected with the liquid storage tank fixing flange 214 on the top of the inner wall of the liquid storage tank 21. As shown in fig. 5, the capillary holder includes a plurality of porous plates 227, the capillaries 221 are formed through the porous plates 227, and the capillaries 221 are wound in a plurality of turns so that the capillaries 221 have a larger contact area with the electrolyte. The length of the portion of the capillary tubes 221 that extend out above the capillary tube holder is greater than the distance from the top of the capillary tube holder to the cooling water inlet flange 212 or the cooling water outlet flange 213. Two ends of the capillary 221, which penetrate through the third through hole 226, are a liquid inlet end and a liquid outlet end, and the two ends are fixedly connected with the connection assembly 222 respectively. The capillary 221 is made of PFA, FEP, PTEP material. The capillary 221 made of PFA or FEP is connected with the capillary joint 222A by adopting a welding process, and the material and the process have the advantages of better sealing property, high pressure resistance and higher cost. The capillary 221 made of PTFE is connected to the capillary joint 222A by expansion joint, which is relatively low in cost, but inferior in sealing performance and compressive strength. The liquid in the capillary 221 is tap water, deionized water, or frozen saline, but is not limited thereto. If tap water is used, the tap water can be directly connected to the inlet end of the capillary 221 and then discharged from the outlet end. The bottom of the capillary tube frame is fixedly connected with a heat exchange device fixing flange 223. The heat exchanger fixing flange 223 is fixedly connected with the storage tank fixing flange 214 at the bottom of the inner wall of the storage tank 21.

As shown in fig. 6 and 7, the connecting members 222 are a pair, and the number of the connecting members 222 can be increased or decreased according to actual situations. Each pair of connection assemblies 222 is adapted to connect to a capillary tube 221 and is secured to the tank 21 and includes a capillary fitting 222A, an external wire fitting 222B, two loop half flanges 222C, O, a ring 222D, and a gasket 222E. The capillary fitting 222A extends outwardly from the interior of the reservoir 21, and the remaining components (the male connector 222B, the two loop halves 222C, O, the ring 222D, and the gasket 222E) are connected to the capillary fitting 222A outside of the reservoir 21. The capillary joint 222A includes an upper portion and a lower portion, the lower portion of which is communicated with the liquid inlet end or the liquid outlet end of the capillary 221, as shown in fig. 6 to 8, and the inner wall of the upper portion has an internal thread structure matching with the external thread on the outer wall of the lower portion of the external thread joint 222B. The capillary joint 222A has an inverted stepped shape, and the outer diameter of the upper portion thereof is larger than that of the lower portion thereof. The outer diameter of the upper portion of the capillary joint 222A is smaller than the inner diameters of the cooling water inlet flange 212 and the cooling water outlet flange 213, so that the capillary joint 222A can pass through the interior of the reservoir 21 from the interior of the reservoir 21 through the cooling water inlet flange 212 or the cooling water outlet flange 213. The capillary joint 222A is made of PFA, FEP, PTEP. As shown in FIG. 9, the lap half-flange 222C is a semi-annular structure and the two lap plate flanges 222C can be combined into a single annular structure. The inner rings of the two loop half flanges 222C are stepped holes, and are matched with the inverted step shape of the capillary joint 222A, so that the stepped holes of the two loop half flanges 222C after being surrounded are clamped at the upper part of the capillary joint 222A in the step shape. Two loop half flanges 222C grip the capillary fitting 222A and are removably secured over the cooling water inlet flange 212 or the cooling water outlet flange 213. Forming the loose flange as 2 "half flanges" facilitates the installation and securement of the capillary fitting 222A from within the tank 21 to the exterior of the tank 21. A groove is formed in the top of the capillary connector 222A, and an O-ring 222D is disposed in the groove to seal the capillary connector 222A with the external thread connector 222B. The outer wire fitting 222B includes an annular collar secured to an outer wall of the outer wire fitting 222B. After the thread structures of the outer thread joint 222B and the capillary joint 222A are screwed, the annular retainer ring is clamped above the outer thread joint 222A, and the top of the O-ring 222D is attached to the bottom of the annular retainer ring of the outer thread joint 222B, so that a sealing effect is achieved. The sealing gasket 222E is disposed at the lower end of the loop half flange 222C and located between the cooling water outlet flanges 212 or between the loop half flange 222C and the cooling water outlet flange 212, for sealing between the lower end surface of the loop half flange 222C and the liquid storage tank 21.

As shown in fig. 4, the outer wall 224 of the cylindrical structure surrounds the outside of the capillary holder, and the outer wall 224 is provided with a plurality of first through holes 225 through which the electrolytic solution enters, and the first through holes 225 are kidney-shaped holes. The electrolyte enters the inside of the heat exchanging device 22 from the first through hole 225 and performs sufficient heat exchange with the liquid in the capillary tube 221, thereby lowering the temperature of the electrolyte.

The heat exchange is carried out by adopting the flow battery heat exchange device 2, the device is firstly required to be installed, and the installation steps are as follows:

s1: fixing part of the structure of the heat exchange device 22:

s101: a plurality of third through holes 226 are uniformly arranged on the capillary tube frame at intervals, and the diameter of each third through hole 226 is larger than the outer diameter of each capillary tube 221, so that the capillary tubes 221 can penetrate out;

s102: the heat exchange device fixing flanges 223 are welded at the top and the bottom of the capillary tube frame;

s103: coiling a plurality of capillary tubes 221 around the capillary tube rack and penetrating the liquid inlet end and the liquid outlet end of each capillary tube 221 out of a third through hole 226 on the capillary tube rack;

s104: then, the capillary 221 is penetrated into the lower part of the capillary joint 222A and is hot-melted with the capillary joint 222A, a movable capillary 221 with a certain length needs to be reserved below the capillary joint 222A, and the length needs to be larger than the distance from the third through hole 226 to the storage tank fixing flange 214;

s105: a plurality of first through holes 225 are formed in the outer wall 224 of the heat exchanger 22, and the outer wall 224 is welded to the capillary tube holder.

S2: fixing the heat exchange device 22 with the liquid storage tank 21:

s201: putting the heat exchange device 22 (the capillary tube 221, the capillary tube frame, the heat exchange device fixing flange 223, the capillary tube joint 222A and the outer wall) into a manhole 211 of the liquid storage tank 21, and fixedly connecting the heat exchange device fixing flange 223 of the heat exchange device 22 with a storage tank fixing flange 214 of the liquid storage tank 21 through PP/nylon bolts and nuts;

s202: respectively extending the capillary joint 222A from the cooling water inlet flange 212 and the cooling water outlet flange 213 from inside to outside, placing an O-shaped ring 222D on a groove at the top of the capillary joint 222A, screwing the external wire joint 222B with the capillary joint 222A outside the storage tank 21 for threaded connection, and attaching the external wire joint 222B with the top of the O-shaped ring 222D;

s203: the upper portion of capillary fitting 222A is clamped by 2 looper half flanges 222C;

s204: and a sealing gasket 222E is arranged between the loop half flange 222C and the cooling water inlet flange 212 or the cooling water outlet flange 213, and is fixedly connected with the cooling water inlet flange 212 or the cooling water outlet flange 213.

S3: connecting the capillary tube 221 with an external cooling water pipe: the condenser tube can directly use water pipe, is connected water pipe and outer screwed joint 222B, adopts PVC glue to bond, can utilize the water pressure of water pipe network self, lets the cooling water at heat transfer device 22 internal loop, plays the effect of heat transfer, and this kind of mode can reduce the outside pipe connection of heat transfer device 22, also need not additionally for heat transfer device 22 configuration delivery pump, can effectively reduce redox flow battery energy storage system's consumption.

According to a second embodiment of the present invention, a flow battery heat exchange device 2 is provided, as shown in fig. 10, the flow battery heat exchange device 2 is of a vertical structure, and the rest of the structure is the same as that of the flow battery heat exchange device 2 of the first embodiment.

The storage tank is not limited to a horizontal or vertical storage tank, and can be various containers such as a non-standard tank body, a reaction kettle and the like.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.