Heat energy recovery device for electrolytic hydrogen production pressurization system

Abstract

The utility model discloses a heat energy recovery device for an electrolytic hydrogen production pressurization system. The heat energy recovery device comprises the electrolytic hydrogen production pressurization system and the heat energy recovery device, the electrolytic hydrogen production pressurization system comprises an electrolytic cell and a purification device, the purification device is connected with the electrolytic cell and the compressor, the electrolytic cell prepares hydrogen through the electrolysis effect, and the generated hydrogen is purified through the purification device, compressed through the compressor and then supplied to the hydrogen using equipment and the hydrogen storage tank. The heat energy recovery device comprises a heat conduction layer, a first heat conduction pipe, a second heat conduction pipe and a thermoelectric generator. A first heat-conducting pipe is arranged on the heat-conducting layer, one end of the first heat-conducting pipe is connected with the heat-conducting layer, and the other end of the first heat-conducting pipe is connected with one end of a semiconductor element in the thermoelectric generator to form a high-temperature end; one end of the second heat-conducting pipe is connected with a heat-conducting layer of the low-temperature purification equipment, and the other end of the second heat-conducting pipe is connected with the other end of the semiconductor element in the thermoelectric generator to form a low-temperature end; the thermoelectric generator converts heat energy into electric energy through the thermoelectric effect of the high-temperature end and the low-temperature end.

Description

Technical Field

[0001] The utility model relates to the field of hydrogen energy, in particular to a heat energy recovery device for an electrolytic hydrogen production pressurization system. Background Art

[0002] Hydrogen electrolysis is a process that uses electricity to split water into hydrogen and oxygen. This is a common method of hydrogen production and is also known as water electrolysis. The basic principle of hydrogen electrolysis is to split water into hydrogen and oxygen by passing an electric current through an anode and a cathode in the water.

[0003] For example, the patent application document with application number 202111045184.X discloses a hydrogen electrolysis boosting system and a hydrogen electrolysis method. The hydrogen electrolysis boosting system uses clean energy to produce hydrogen by electrolysis, including an electrolyzer, a heat exchanger, a gas-liquid separator, a heater, a flow pump and a temperature detection component arranged in an electrolyte circulation loop, and the electrolyzer is connected to a new energy power supply for electrolysis operation. The heat exchanger can dissipate heat from the electrolyte, the heater can heat the electrolyte, the flow pump can pump out the electrolyte, and the temperature detection component can detect the temperature of the electrolyte.

[0004] The above patent application scheme sets a temperature detection component. When the temperature detection component determines that the temperature of the electrolyte is not less than a first preset temperature, the heat exchanger is turned on, the heater is turned off, and the electrolytic cell is in a working state; when the temperature detection component determines that the temperature of the electrolyte is less than the first preset temperature, the heat exchanger is turned off, the heater is turned on, and the temperature of the electrolyte is maintained between the first preset temperature and the second preset temperature. The second preset temperature is less than the first preset temperature, and the electrolytic cell is in a standby state.

[0005] However, the above electrolytic hydrogen production pressurization system still has the following problems:

[0006] Hydrogen production in electrolyzers is achieved by applying electrical energy to decompose water into hydrogen and oxygen through a catalyst. Since electrical energy is applied to electrolyze water, the process will generate a lot of heat. Currently, no effective measures have been taken to address the heat generated by electrolysis. The hydrogen generated by electrolysis must be in a low-temperature state during purification, and the connected rear-end compressor will generate a lot of heat during pressurization. The large amount of energy generated in these two states, cold and hot, is currently not utilized, but is instead released, which results in a large waste of energy and reduces utilization.

[0007] Therefore, it is necessary to improve such a structure to overcome the above-mentioned defects. Utility Model Content

[0008] The utility model aims to provide a heat energy recovery device for an electrolytic hydrogen production pressurization system, which can recover and utilize the released heat energy and convert it back into electrical energy to supply power to the electrolytic cell.

[0009] The above technical objectives of the utility model are achieved through the following technical solutions:

[0010] A heat energy recovery device for an electrolytic hydrogen production pressurization system, comprising an electrolytic hydrogen production pressurization system and a heat energy recovery device;

[0011] The electrolytic hydrogen production and pressurization system comprises an electrolyzer, a purification device, a compressor, a hydrogen-using device and a hydrogen storage tank;

[0012] One end of the electrolyzer is provided with a power supply end for receiving electric energy, and the hydrogen outlet of the electrolyzer is connected to the purification equipment. The electrolyzer prepares hydrogen by electrolysis, and the generated hydrogen is purified by the purification equipment and then compressed by the compressor, and then supplied to the hydrogen-using equipment and the hydrogen storage tank through the first pipeline and the second pipeline respectively;

[0013] The heat energy recovery device comprises a heat conducting layer, a first heat conducting pipe, a second heat conducting pipe and a thermoelectric generator;

[0014] The heat-conducting layer is arranged on the outer surface of the electrolytic cell, and a first heat-conducting tube is arranged on the heat-conducting layer, one end of the first heat-conducting tube is connected to the heat-conducting layer, and the other end of the first heat-conducting tube is connected to one end of the semiconductor element in the thermoelectric generator, and the first heat-conducting tube is used to conduct the high temperature generated when the electrolytic cell is working to one end of the semiconductor element to form a high-temperature end;

[0015] One end of the second heat pipe is connected to the heat conduction layer of the purification equipment, and the other end of the second heat pipe is connected to the other end of the semiconductor element in the thermoelectric generator. The second heat pipe is used to conduct the low temperature of the low-temperature purification equipment to the other end of the semiconductor element to form a low-temperature end;

[0016] The thermoelectric generator converts thermal energy into electrical energy through thermoelectric effects at a high temperature end and a low temperature end.

[0017] Furthermore, the power output end of the thermoelectric generator is connected to the power supply end of the electrolytic cell, which is used to supply power to part of the electrolytic cell.

[0018] Furthermore, the thermoelectric generator includes a metal sheet, a P pole arranged at one end of the metal sheet, and an N pole arranged at the other end of the metal sheet; the P pole is used as a high-temperature end, and the N pole is used as a low-temperature end.

[0019] Furthermore, one end of the first pipeline is connected to the compressor, and the other end of the first pipeline is connected to the hydrogen-using equipment. A second pipeline for connecting to the hydrogen storage tank is provided on the first pipeline, and a control valve for opening / closing the second pipeline is provided on the second pipeline.

[0020] In summary, the utility model has the following beneficial effects:

[0021] By wrapping the electrolytic cell and the compressor casing with a heat-conducting layer, the heat is conducted to one end of the metal sheet inside the thermoelectric generator through a heat pipe to form a higher temperature end, and the low-temperature purification equipment is wrapped with a heat-conducting layer, and the heat is conducted to the other end of the metal sheet inside the thermal generator through a heat pipe to form a lower temperature end. The thermoelectric generator converts thermal energy into electrical energy through the thermoelectric effect of the high-temperature end and the low-temperature end, thereby recycling the dissipated heat energy and converting it back into electrical energy to power the electrolytic cell. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of a heat energy recovery device for an electrolytic hydrogen production pressurization system according to the utility model. DETAILED DESCRIPTION

[0023] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with illustrations and specific embodiments.

[0024] like Figure 1 As shown, the utility model proposes a heat energy recovery device for an electrolytic hydrogen production pressurization system, comprising an electrolytic hydrogen production pressurization system and a heat energy recovery device;

[0025] The electrolytic hydrogen production and pressurization system comprises an electrolyzer, a compressor, a purification device, a hydrogen use device and a hydrogen storage tank;

[0026] One end of the electrolyzer is provided with a power supply end for receiving electric energy, and the hydrogen outlet of the electrolyzer is connected to the compressor. The electrolyzer produces hydrogen by electrolysis, and the produced hydrogen is compressed by the compressor and supplied to the hydrogen-using equipment and the hydrogen storage tank through the first pipeline and the second pipeline respectively;

[0027] The heat energy recovery device comprises a heat conducting layer, a first heat conducting pipe, a second heat conducting pipe and a thermoelectric generator;

[0028] The heat-conducting layer is arranged on the outer surface of the electrolytic cell, the purification equipment and the compressor, and a first heat-conducting pipe is arranged on the heat-conducting layer, one end of the first heat-conducting pipe is connected to the heat-conducting layer, and the other end of the first heat-conducting pipe is connected to one end of the semiconductor element in the thermoelectric generator, and the first heat-conducting pipe is used to conduct the high temperature generated when the electrolytic cell is working to one end of the semiconductor element to form a high-temperature end;

[0029] One end of the second heat pipe is connected to the heat conduction layer of the purification equipment, and the other end of the second heat pipe is connected to the other end of the semiconductor element in the thermoelectric generator. The second heat pipe is used to conduct the low temperature of the low-temperature purification equipment to the other end of the semiconductor element to form a low-temperature end;

[0030] The thermoelectric generator converts thermal energy into electrical energy through thermoelectric effects at a high temperature end and a low temperature end.

[0031] The power output end of the thermoelectric generator is connected to the power supply end of the electrolytic cell, and is used to supply power to the electrolytic cell.

[0032] The thermoelectric generator comprises a metal sheet, a P pole arranged at one end of the metal sheet, and an N pole arranged at the other end of the metal sheet; the P pole is used as a high temperature end, and the N pole is used as a low temperature end.

[0033] One end of the first pipeline is connected to the compressor, and the other end of the first pipeline is connected to the hydrogen-using equipment. A second pipeline for connecting to the hydrogen storage tank is provided on the first pipeline, and a control valve for opening / closing the second pipeline is provided on the second pipeline.

[0034] The working principle of the utility model is as follows:

[0035] By wrapping the electrolytic cell and the compressor casing with a heat-conducting layer, the heat is conducted to one end of the metal sheet inside the thermoelectric generator through a heat-conducting pipe to form a higher temperature end. The purification equipment working in a low-temperature state is wrapped with a heat-conducting layer, and the heat is conducted to the other end of the metal sheet inside the thermal generator through a heat-conducting pipe to form a lower temperature end. The thermoelectric generator converts thermal energy into electrical energy through the thermoelectric effect of the high-temperature end and the low-temperature end, thereby recycling the dissipated heat energy and converting it back into electrical energy to power the electrolytic cell.

[0036] In this document, the directions or positional relationships indicated by terms such as "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", "outside", "vertical", and "horizontal" are based on the directions or positional relationships shown in the accompanying drawings and are only for the clarity of the technical solution and the convenience of description. Therefore, they should not be understood as limitations on the present invention.

[0037] In this document, the terms "comprises," "comprising," or any other variations thereof, are intended to cover a non-exclusive inclusion of elements other than those listed and may also include additional elements not expressly listed.

[0038] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only for explaining the principle of the utility model. The utility model may have various changes and improvements without departing from the spirit and scope of the utility model. These changes and improvements fall within the scope of the utility model to be protected. The scope of protection claimed by the utility model is defined by the attached claims and their equivalents.

Claims

1. A heat recovery device for an electrolytic hydrogen production pressurization system, characterized in that: It includes an electrolytic hydrogen production pressurization system and a heat recovery device; The electrolytic hydrogen production and pressurization system comprises an electrolyzer, a compressor, hydrogen-using equipment and a hydrogen storage tank; One end of the electrolyzer is provided with a power supply end for receiving electric energy, and the hydrogen outlet of the electrolyzer is connected to the purification equipment. The electrolyzer prepares hydrogen by electrolysis, and the generated hydrogen is purified by the purification equipment and then compressed by the compressor, and then supplied to the hydrogen-using equipment and the hydrogen storage tank through the first pipeline and the second pipeline respectively; The heat energy recovery device comprises a heat conducting layer, a first heat conducting pipe, a second heat conducting pipe and a thermoelectric generator; The heat-conducting layer is arranged on the outer surface of the electrolytic cell, the purification equipment and the compressor. A first heat-conducting pipe is arranged on the heat-conducting layer of the electrolytic cell. One end of the first heat-conducting pipe is connected to the heat-conducting layer. The other end of the first heat-conducting pipe is connected to one end of the semiconductor element in the thermoelectric generator. The first heat-conducting pipe is used to conduct the high temperature generated by the electrolytic cell and the compressor during operation to one end of the semiconductor element to form a high-temperature end. One end of the second heat pipe is connected to the heat conducting layer of the purification equipment, and the other end of the second heat pipe is connected to the other end of the semiconductor element in the thermoelectric generator. The second heat pipe is used to conduct the low temperature of the low temperature environment during hydrogen purification to the other end of the semiconductor element to form a low temperature end; The thermoelectric generator converts thermal energy into electrical energy through thermoelectric effects at a high temperature end and a low temperature end.

2. The heat energy recovery device for the electrolytic hydrogen production pressurization system according to claim 1 is characterized in that: The power output end of the thermoelectric generator is connected to the power supply end of the electrolytic cell, and is used to supply power to the electrolytic cell.

3. The heat energy recovery device for the electrolytic hydrogen production pressurization system according to claim 1 is characterized in that: The thermoelectric generator comprises a metal sheet, a P pole arranged at one end of the metal sheet, and an N pole arranged at the other end of the metal sheet; the P pole is used as a high temperature end, and the N pole is used as a low temperature end.

4. The heat energy recovery device for the electrolytic hydrogen production pressurization system according to claim 1 is characterized in that: One end of the first pipeline is connected to the compressor, and the other end of the first pipeline is connected to the hydrogen-using equipment. A second pipeline for connecting to the hydrogen storage tank is provided on the first pipeline, and a control valve for opening / closing the second pipeline is provided on the second pipeline.

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