Coil heating device for electrolyte storage tank of flow cell stack

Abstract

The utility model discloses a coil heating device for an electrolyte storage tank of a flow cell stack, which comprises a heating coil arranged in the electrolyte storage tank and arranged on a coil support. The plurality of heating coils are provided with tank body water inlets and tank body water return ports, and the tank body water inlets and the tank body water return ports are respectively connected with a hot water inlet pipeline and a hot water return pipeline through flange plate flow dividers; the utility model has the advantages that the heat exchange area is increased, the heat loss is reduced, and the tank body structure is prevented from being damaged by larger temperature difference inside and outside the tank body; and meanwhile, cross contamination and the like are avoided through closed circulation.

Description

Technical Field

[0001] The utility model relates to a heating device in a storage tank containing highly corrosive media, in particular to a coil heating device for an electrolyte storage tank of a flow battery stack, belonging to the field of performance testing and system operation of a flow energy storage battery stack. Background Art

[0002] In the prior art, electrolyte storage tanks for liquid flow battery stacks are generally heated on the outer shell side of the tank or on the outer shell side of the electrolyte transport pipeline. Since the field of liquid flow energy storage has extremely high requirements for system insulation and safety during operation, the storage tanks and pipelines are made of fiberglass or plastic-fiberglass reinforced materials. Therefore, this method has the following problems: first, the thermal conductivity is poor, and the temperature adjustment reaction is slow and difficult to control; second, leakage in the tank or pipeline welds affects the entire heating system (corroding the heating device and the hot water circulation device) or the electrolyte storage system (the capacity is greatly reduced after the electrolyte is diluted). The above two points are fatal and unacceptable to the liquid flow energy storage system. Utility Model Content

[0003] The purpose of the utility model is to design a coil heating device for the electrolyte storage tank of a flow battery stack, which adopts corrosion-resistant materials to avoid corrosion damage; multiple groups of heating coils directly exchange heat with the electrolyte in the tank, thereby increasing the heat exchange area, reducing heat loss, and avoiding damage to the tank structure due to a large temperature difference between the inside and outside of the tank; at the same time, the closed cycle also avoids cross contamination, etc.

[0004] The technical solution of the utility model is:

[0005] A coil heating device for an electrolyte storage tank of a flow battery stack comprises a heating coil arranged in an electrolyte storage tank, wherein the heating coil is arranged on a coil bracket; the heating coil is provided with a plurality of branches, each of which is provided with a tank water inlet and a tank water return port, wherein the tank water inlet and the tank water return port are respectively connected to a hot water inlet pipe and a hot water return pipe through a flange diverter.

[0006] The electrolyte storage tank is provided with a thermal resistor to collect the temperature of the liquid in the tank in real time.

[0007] Hot water enters the electrolyte storage tank through the hot water inlet pipe and the tank water inlet. The hot water is transformed into multiple thin tubes through the flange diverter, which further increases the heat exchange area and improves the heat exchange efficiency. Similarly, the tank outlet is fixedly connected to the hot water return pipe, and the hot water completes the heat exchange cycle.

[0008] The heating coil is evenly coiled on the coil support inside the electrolyte storage tank, and the length can be determined appropriately according to the actual requirement of the heat exchange area.

[0009] The thermal resistor is fixedly and sealedly installed through the pipe opening of the tank body, and measures the temperature of the liquid in the tank in real time and realizes the remote transmission function.

[0010] The water inlet of the tank body is provided with an electric valve, which is connected to the thermal resistor control and can be remotely controlled. The valve opening is determined according to the temperature change trend monitored by the thermal resistor to adjust the hot water flow.

[0011] The water outlet of the tank is provided with a pressure sensor to monitor the hot water pressure in the pipeline in real time, and the pipeline pressure is adjusted to be stable within a reliable range through the hot water circulation control system, so that the heating coil will not rupture due to excessive pressure.

[0012] All connecting pipes are made of corrosion-resistant materials, including one, multiple or composite polymer materials such as PTFE, PP, PE, PVC, PPH, etc., which improves the corrosion resistance.

[0013] The beneficial effects of the utility model are:

[0014] (1) Use corrosion-resistant materials to avoid corrosion damage;

[0015] (2) Multiple groups of heating coils directly exchange heat with the electrolyte in the tank to increase the heat exchange area, reduce heat loss, and avoid large temperature differences between the inside and outside of the tank that may damage the tank structure;

[0016] (3) Closed loop to avoid cross contamination;

[0017] (4) Equipped with thermal resistors and electric valves, the electrolyte temperature can be quickly, accurately and stably controlled to remain within the specified range;

[0018] (5) The system operates more safely and reliably.

[0019] The utility model is further described below in conjunction with the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic structural diagram of a coil heating device for an electrolyte storage tank of a flow battery stack according to an embodiment of the utility model;

[0021] Figure 2 This is a top view of the heating coil and the coil support according to an embodiment of the utility model. DETAILED DESCRIPTION

[0022] The preferred embodiments of the present invention are described below. It should be understood that the preferred embodiments described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention. Example

[0023] like Figure 1-2As shown, a coil heating device for an electrolyte storage tank of a flow battery stack includes a heating coil 3 arranged in an electrolyte storage tank 5, and the heating coil 3 is arranged on a coil bracket 4; the heating coil 3 is provided with multiple branches, and each is provided with a tank water inlet S1 and a tank water return port S2, and the tank water inlet and the tank water return port are respectively connected to a hot water inlet pipe 1 and a hot water return pipe 2 through a flange diverter 6.

[0024] The electrolyte storage tank 5 is provided with a thermal resistor 7 to collect the temperature of the liquid in the tank in real time.

[0025] Hot water enters the electrolyte storage tank 5 through the hot water inlet pipe 1 via the tank water inlet S1 (the hot water inlet pipe 1 and the tank water inlet S1 are fixedly sealed by a flange connection), and the hot water is transformed into multiple thin tubes (collectively referred to as heating coils 3) through the flange diverter 6, which can further increase the heat exchange area. Similarly, the tank water outlet S2 is fixedly connected to the hot water return pipe 2, and the hot water completes the heat exchange cycle.

[0026] The heating coil 3 is evenly coiled in the coil support 4 inside the electrolyte storage tank 5, and the length can be determined according to the actual heat exchange area.

[0027] The thermal resistor 7 is fixedly and sealedly installed through the tank body pipe mouth S3 to measure the liquid temperature in the tank in real time and realize the remote transmission function; the thermal resistor transmits the resistance signal to the computer control device or other secondary instruments through the lead wire. The computer control system is the main distributed control system in the entire battery stack test, also known as DCS.

[0028] The water inlet S1 of the tank is provided with an electric valve 8, which is connected to the thermal resistor 7 and can be remotely controlled to adjust the hot water flow by determining the valve opening according to the temperature change trend monitored by the thermal resistor 7;

[0029] The tank water outlet S2 is provided with a pressure sensor 9 to monitor the hot water pressure in the pipeline in real time, and adjust the pipeline pressure to be stable within a reliable range through the hot water circulation control system, so that the heating coil 3 will not be ruptured due to excessive pressure.

[0030] The above hot water circulation control system is an existing system (mainly including a heating boiler, a water supply buffer tank, a circulation pump, a water inlet and return pipe, and several accessories (including a pressure transmitter, a thermal resistor, a liquid level gauge, an electric valve, etc., all of which can have information remote transmission function and can be adjusted and controlled by DCS), which can be operated locally or centrally controlled by DCS.

Claims

1. A coil heating device for an electrolyte storage tank of a flow battery stack, characterized in that: It includes a heating coil arranged in an electrolyte storage tank, and the heating coil is arranged on a coil bracket; the heating coil is provided with multiple branches, and each is provided with a tank water inlet and a tank water return port, and the tank water inlet and the tank water return port are respectively connected to the hot water inlet pipe and the hot water return pipe through a flange diverter.

2. A flow battery stack electrolyte storage tank coil heating device according to claim 1, characterized in that: A thermal resistor is arranged in the electrolyte storage tank.

3. The coil heating device for the electrolyte storage tank of a flow battery stack according to claim 1, characterized in that: The heating coil is evenly coiled on the coil support inside the electrolyte storage tank.

4. The coil heating device for the electrolyte storage tank of a flow battery stack according to claim 2, characterized in that: The thermal resistor is fixedly and sealedly installed through the pipe opening of the tank body.

5. The coil heating device for the electrolyte storage tank of a flow battery stack according to claim 2, characterized in that: The water inlet of the tank body is provided with an electric valve, which is control-connected to the thermal resistor. The valve opening is determined according to the temperature change trend monitored by the thermal resistor to adjust the hot water flow.

6. The device for heating coils of electrolyte storage tanks of a flow battery stack according to claim 1, characterized in that: The water outlet of the tank is provided with a pressure sensor.

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