阅读说明：本技术 一种二氧化碳熔盐电解实验装置 (Carbon dioxide fused salt electrolysis experimental apparatus ) 是由 彭明 李亮星 彭军军 闵定伟 张勃 黄茜琳 于 2020-06-04 设计创作，主要内容包括：本发明公开了一种二氧化碳熔盐电解实验装置,包括二氧化碳气瓶、密封电解装置和气体收集装置,密封电解装置包括耐高温不锈钢坩埚、石墨电解槽、阳极、阴极和直流电源,耐高温不锈钢坩埚包括埚体和埚盖,埚盖密封盖合在埚体上,埚体内设有石墨电解槽,埚盖上设有进气接头和出气接头,二氧化碳气瓶的出口经通气管与进气接头连接,埚盖的底部设有向下延伸连通进气接头的延伸管,直流电源设于埚盖上方,阳极和阴极一方面通过导杆与直流电源连接,另一方面通过导杆密封穿过埚盖悬挂并伸入熔盐电解质中,埚体内设有用于罩住阳极的集气罩,集气罩的顶部设有排气管。本发明结构简单、易于组装、气密性好,能有效收集高纯度氧气。(The invention discloses a carbon dioxide molten salt electrolysis experimental device, which comprises a carbon dioxide gas cylinder, a sealed electrolysis device and a gas collection device, wherein the sealed electrolysis device comprises a high-temperature resistant stainless steel crucible and a graphite electrolysis bath, anode, negative pole and DC power supply, high temperature resistant stainless steel crucible includes the crucible body and crucible lid, the sealed lid of crucible lid closes on the crucible body, the internal graphite electrolysis trough that is equipped with of crucible, the crucible is covered and is equipped with air connector and the joint of giving vent to anger, the export of carbon dioxide gas cylinder is connected with air connector through the vent-pipe, the bottom of crucible lid is equipped with the extension pipe of downwardly extending intercommunication air connector, DC power supply locates crucible lid top, positive pole and negative pole pass through the guide arm on the one hand and are connected with DC power supply, on the other hand passes the crucible lid through the guide arm is sealed and hangs and stretch into in the molten salt electrolyte, the internal gas collecting channel that is used for covering the positive pole that is equipped with of crucible, the top of gas collecting. The invention has simple structure, easy assembly and good air tightness, and can effectively collect high-purity oxygen.)

1. A carbon dioxide fused salt electrolysis experimental device is characterized by comprising a carbon dioxide gas cylinder, a sealing electrolysis device and a gas collection device, wherein the sealing electrolysis device comprises a high-temperature-resistant stainless steel crucible, a graphite electrolysis bath, an anode, a cathode and a direct current power supply, the high-temperature-resistant stainless steel crucible comprises a crucible body and a crucible cover, the crucible cover is sealed and covered on the crucible body, the graphite electrolysis bath is arranged in the crucible body, a fused salt electrolyte is arranged in the graphite electrolysis bath, a gas inlet joint and a gas outlet joint are arranged on the crucible cover,

the outlet of the carbon dioxide cylinder is connected with the air inlet joint through an air pipe, the bottom of the crucible cover is provided with an extension pipe which extends downwards and is communicated with the air inlet joint,

the direct current power supply is arranged above the crucible cover, the anode and the cathode are respectively connected with the direct current power supply through guide rods, the anode and the cathode respectively penetrate through the crucible cover through the guide rods in a sealing manner to be suspended and extend into the molten salt electrolyte,

the gas collecting hood is arranged in the crucible body and used for covering the anode, the lower part of the gas collecting hood extends into the molten salt electrolyte, the top of the gas collecting hood is detachably provided with a vent pipe corresponding to a gas outlet joint, and the gas outlet joint is connected with a gas collecting device through a gas collecting pipe.

2. The carbon dioxide molten salt electrolysis experimental device as claimed in claim 1, wherein a corundum tube for an anode guide rod to penetrate through is detachably mounted at the bottom of the crucible cover and used for insulating the anode guide rod from a gas collecting hood.

3. The experimental device for carbon dioxide molten salt electrolysis as claimed in claim 2, wherein the top of the anode cover is provided with two threaded holes, and two ends of the exhaust pipe and the corundum pipe are respectively provided with threads; the upper end of the exhaust pipe is in threaded connection with the crucible cover, the lower end of the exhaust pipe is in threaded connection with the anode cover, and the threaded connection position is sealed by adopting a high-temperature resistant stainless steel sealing ring; the upper end of the corundum tube is in threaded connection with the crucible cover, the lower end of the corundum tube is in threaded connection with the anode cover, and the threaded connection position is sealed by adopting a high-temperature resistant stainless steel sealing ring.

4. The carbon dioxide molten salt electrolysis experimental device as claimed in claim 3, wherein the crucible cover is provided with a cathode penetration joint through which a cathode guide rod passes and an anode penetration joint corresponding to the corundum tube through which an anode guide rod passes, the air inlet joint, the air outlet joint, the cathode penetration joint and the anode penetration joint are all high temperature resistant stainless steel threaded pipe joints, and the joint of the vent pipe and the air inlet joint, the joint of the air collector pipe and the air outlet joint, the cathode penetration joint and the cathode guide rod, and the anode penetration joint and the anode guide rod are respectively connected and sealed by hoops matching with sealing rings.

5. The carbon dioxide molten salt electrolysis experimental device as claimed in claim 1, wherein the gas collecting device comprises a gas guide tube, a gas collecting bottle support and a water tank, the gas collecting bottle is erected in the water tank through the gas collecting bottle support, one end of the gas collecting tube is connected with the gas outlet joint, the other end of the gas collecting tube is connected with the gas guide tube, and one end of the gas guide tube extends into the gas collecting bottle.

6. A carbon dioxide molten salt electrolysis experimental apparatus according to claim 5, characterized in that the gas collecting device further comprises a condenser pipe, and the condenser pipe is arranged between the gas collecting pipe and the gas guide pipe.

7. A carbon dioxide molten salt electrolysis experimental apparatus as claimed in claim 1, characterized in that a control gas valve is provided at the outlet of the carbon dioxide gas cylinder, and a gas flow meter is provided on the vent pipe.

8. The carbon dioxide molten salt electrolysis experimental device as claimed in claim 1, characterized in that the anode is a platinum electrode and the cathode is a titanium electrode.

9. The carbon dioxide molten salt electrolysis experimental device is characterized in that the crucible cover and the crucible body are sealed through a metal sealing ring sheet, and the crucible cover and the crucible body are fixed through bolts.

Technical Field

The invention relates to a carbon dioxide molten salt electrolysis experimental device, in particular to an experimental device for preparing oxygen by electrolyzing carbon dioxide and collecting anode gas products.

Background

The high-speed development of industry continues to increase the demand for energy, and the use of fossil fuel coal, oil and natural gas provides a great deal of energy for the development of modern industry and society while emitting a great amount of carbon dioxide. Carbon dioxide is used as a main greenhouse effect gas, and how to perform resource utilization is very important. Carbon dioxide is composed of carbon atoms and oxygen atoms, and the decomposition of carbon dioxide into carbon and oxygen is undoubtedly the optimal choice, but carbon dioxide stability is strong, and it is generally difficult to decompose it, and molten salt electrochemical technology is through electron as energy meson, can effectively decompose carbon dioxide and prepare oxygen under electron as energy carrier through molten salt electrochemical technology, but current experimental apparatus is difficult to guarantee the gas tightness under high temperature, is difficult to collect high-purity oxygen.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a carbon dioxide molten salt electrolysis experimental device.

The technical scheme of the invention is as follows:

a carbon dioxide fused salt electrolysis experimental device comprises a carbon dioxide gas cylinder, a sealing electrolysis device and a gas collection device, wherein the sealing electrolysis device comprises a high-temperature resistant stainless steel crucible, a graphite electrolysis bath, an anode, a cathode and a direct current power supply, the high-temperature resistant stainless steel crucible comprises a crucible body and a crucible cover, the crucible cover is sealed and covered on the crucible body, the graphite electrolysis bath is arranged in the crucible body, a fused salt electrolyte is arranged in the graphite electrolysis bath, an air inlet joint and an air outlet joint are arranged on the crucible cover, the outlet of the carbon dioxide gas cylinder is connected with the air inlet joint through an air pipe, an extension pipe which extends downwards and is communicated with the air inlet joint is arranged at the bottom of the crucible cover, the direct current power supply is arranged above the crucible cover, the anode and the cathode are respectively connected with the direct current power supply through guide rods, the anode and the cathode are respectively sealed through guide rods and pass through the crucible cover to be suspended and extend into the fused salt electrolyte, a, the lower part of the gas-collecting hood extends into the molten salt electrolyte, the top of the gas-collecting hood is detachably provided with an exhaust pipe corresponding to a gas outlet joint, and the gas outlet joint is connected with a gas collecting device through a gas collecting pipe.

Preferably, the bottom of the crucible cover is detachably provided with a corundum tube which is used for enabling the anode guide rod to penetrate through and insulating the anode guide rod from the gas collecting hood.

Preferably, the top of the anode cover is provided with two threaded holes, and two ends of the exhaust pipe and the corundum pipe are respectively provided with threads; the upper end of the exhaust pipe is in threaded connection with the crucible cover, the lower end of the exhaust pipe is in threaded connection with the anode cover, and the threaded connection position is sealed by adopting a high-temperature resistant stainless steel sealing ring; the upper end of the corundum tube is in threaded connection with the crucible cover, the lower end of the corundum tube is in threaded connection with the anode cover, and the threaded connection position is sealed by adopting a high-temperature resistant stainless steel sealing ring.

Preferably, the crucible cover is provided with a cathode penetrating joint for a cathode guide rod to pass through and an anode penetrating joint corresponding to a corundum tube for an anode guide rod to pass through, the air inlet joint, the air outlet joint, the cathode penetrating joint and the anode penetrating joint all adopt high-temperature-resistant stainless steel threaded pipe joints, and the joint of the vent pipe and the air inlet joint, the joint of the air collecting pipe and the air outlet joint, the cathode penetrating joint and the cathode guide rod and the anode penetrating joint and the anode guide rod are respectively connected and sealed through hoops matched with sealing rings.

Preferably, the gas collecting device comprises a gas guide tube, a gas collecting bottle support and a water tank, the gas collecting bottle is erected in the water tank through the gas collecting bottle support, one end of the gas collecting tube is connected with the gas outlet joint, the other end of the gas collecting tube is connected with the gas guide tube, and one end of the gas guide tube extends into the gas collecting bottle.

Preferably, the gas collecting device further comprises a condenser pipe, and the condenser pipe is arranged between the gas collecting pipe and the gas guide pipe.

Preferably, a control gas valve is arranged at the outlet of the carbon dioxide gas cylinder, and a gas flowmeter is arranged on the vent pipe.

Preferably, the anode is a platinum electrode and the cathode is a titanium electrode.

Preferably, the crucible cover and the crucible body are sealed through a metal sealing ring sheet, and the crucible cover and the crucible body are fixed through bolts.

The invention has the beneficial effects that:

1. the experimental device has the advantages of simple structure, easy assembly, simple operation in the carbon dioxide electrolysis experimental process, safety and reliability.

2. The anode hood is arranged to improve the collection efficiency of anode gas, short circuit can be prevented by arranging the corundum tube, the anode guide rod is prevented from enabling the whole gas collecting hood to be used as an anode to perform electrolytic reaction, and the anode hood can be installed more stably.

3. The gas tightness is good, the gas purity is high, the oxygen generated on the inert anode can be effectively collected, and the gas flow rate can be conveniently controlled by arranging the gas flowmeter.

4. A condenser pipe is arranged between the gas collecting pipe and the gas guide pipe; can play the role of cooling gas and avoid the scald caused by overhigh temperature in the gas collecting bottle when the operator contacts the gas collecting bottle.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a schematic view showing a sealing structure of an anode stem in an embodiment of the present invention;

FIG. 3 is a top view of an anode stem sealing structure in an embodiment of the present invention;

fig. 4 is a schematic view of a sealing structure of a gas header in an embodiment of the invention;

in the figure: the device comprises a carbon dioxide gas cylinder 1, a control gas valve 2, a gas flowmeter 3, a vent pipe 4, an extension pipe 5, a direct current power supply 6, a corundum pipe 7, a crucible cover 8, a molten salt electrolyte 9, a cathode 10, a graphite electrolytic bath 11, an anode 12, a crucible body 13, a gas collecting hood 14, a metal sealing ring sheet 15, a bolt 16, a hoop 17, a condenser pipe 18, a gas guide pipe 19, a gas collecting bottle 20, a gas collecting bottle support 21, a water tank 22, an exhaust pipe 23, a gas collecting pipe 24, a high-temperature-resistant insulating sealing ring 25, a sealing copper sheet 26, a bolt 27, a high-temperature-resistant stainless steel hoop connector 28, an air inlet connector 81, an air outlet connector 82, a cathode penetrating connector 83, an anode penetrating connector 84, a cathode guide rod 100 and an.

Detailed Description

The present invention will be further described with reference to the following examples, however, the scope of the present invention is not limited to the following examples.