Device for on-line conversion of sodium source into hydrogen energy and heat energy

Abstract

The utility model discloses a device for on-line conversion of a sodium source into hydrogen energy and heat energy, which is characterized in that reactors are designed into split structures which are mutually sleeved, a liquid discharge pipe is arranged between an inner reactor and an outer reactor, the lower end of the liquid discharge pipe is arranged in alkali liquor, and a liquid discharge port does not need to be arranged at the bottom of the reactor, so that the bottom of the outer reactor is complete, simple in structure and easy to manufacture. On one hand, the corrosion resistance of the outer reactor is improved due to no interface, and on the other hand, if the outer reactor is corroded, only the outer reactor needs to be replaced, and the inner reactor is reserved for continuous use, so that the maintenance cost of the device is greatly reduced; meanwhile, scales are arranged on the side wall of the inner reactor, the generated hydrogen buoyancy can push the upper reactor to float upwards, and the hydrogen generation speed, the hydrogen amount in the reactor and the liquid level height can be calculated by observing the changed scales, so that the liquid inlet amount or the liquid discharge amount is controlled, the hydrogen reaction speed is controlled, a sensor does not need to be arranged in the reactor, and the cost is reduced. The maintenance cost of the device is reduced; and the operation reliability of the device is improved.

Description

Technical Field

[0001] The utility model relates to an energy conversion device, in particular to a device for online conversion of a sodium source into hydrogen energy and thermal energy. Background Art

[0002] Energy is the material basis for the development of human society, economy and science and technology. Building an efficient and low-carbon renewable energy system is the fundamental way to solve the dual crises of global energy depletion and environmental pollution. Therefore, environmentally friendly energy such as hydropower, wind power, photovoltaic power generation and hydrogen energy are developing rapidly. However, while accelerating the development and utilization of clean energy, hydropower, wind power and photovoltaic power generation have encountered problems such as difficulty in storage, transmission and consumption.

[0003] Sodium has a wide range of sources and is abundant on Earth, accounting for as much as 2.64% of the reserves in the Earth's crust. The production process of sodium is mature. Industrially, sodium is prepared by electrolyzing NaCl or NaOH, and the production rate of metallic sodium is controlled by adjusting parameters such as electrolysis conditions. The storage and transportation technology of sodium is very mature, and the cost is equivalent to 1 / 3 of that of high-pressure hydrogen. In particular, sodium reacts with water to produce hydrogen and sodium hydroxide (industrial basic alkali). If sodium is used as a raw material and converted into hydrogen energy and thermal energy, it can solve problems such as energy storage and transmission, or break the bottleneck problem of large-scale development and utilization of renewable energy, thereby replacing traditional petrochemical energy and changing the world's energy structure.

[0004] The invention patent application with Chinese patent application number 202310749220.3 discloses "a device and method for online conversion of sodium source into hydrogen energy". The device is "provided with a reactor, with an alkali liquid discharge outlet at the lower end of the reactor, a discharge valve connected to the alkali liquid discharge outlet, a hydrogen collection port and a feeding port at the upper end of the reactor, a liquid injection pipe at the lower end of the reactor, and a liquid injection valve connected to the liquid injection pipe, and a sodium chamber located below the feeding port and open on the top is also provided in the reactor, the bottom of the sodium chamber is higher than the bottom surface of the reactor, and the side of the sodium chamber has a plurality of through holes, and the reactor is provided with an alkali liquid temperature sensor connected to the controller, a non-polar organic solvent temperature sensor and a liquid level gauge capable of detecting the liquid level of alkali liquid and non-polar organic solvent, and a heat exchanger located at the upper end of the reactor, and a heat exchange valve connected to the heat exchanger". There are the following problems:

[0005] 1. The high-temperature strong alkaline solution generated at the lower end of the reactor makes the bottom of the reactor, especially the alkaline solution outlet, very prone to corrosion. Severe corrosion will cause the entire reactor to be scrapped, increasing the maintenance cost of the device;

[0006] 2. The alkali solution temperature sensor, non-polar organic solvent temperature sensor and the level gauge for detecting the liquid level of alkali solution and non-polar organic solvent installed in the reactor are extremely easy to be damaged due to being in a high temperature, high humidity and high pressure reaction environment. This not only increases the maintenance cost of the equipment, but may also cause accidents due to failure of temperature and liquid level detection. Summary of the invention

[0007] The utility model aims to solve the above technical problems existing in the prior art and provides a device for online conversion of a sodium source into hydrogen energy and thermal energy.

[0008] The technical solution of the utility model is: a device for converting a sodium source into hydrogen energy and heat energy online, provided with a reactor, the reactor is composed of an inner reactor with an open lower end and an outer reactor with an open upper end, the inner reactor is placed in the outer reactor and can move up and down;

[0009] The upper end of the inner reactor is provided with a hydrogen collecting pipe and a sodium injection port, a pressure reducing valve is provided on the hydrogen collecting pipe, a heat exchanger is fixed in the reactor, two ends of the heat exchanger are respectively connected with a liquid inlet pipe and a liquid outlet pipe, and a liquid level scale is provided on the outer wall of the inner reactor;

[0010] The bottom surface of the outer reactor is provided with a mesh sodium stacker placed below the sodium injection port;

[0011] The external reactor is connected to an injection pipe, on which there is an injection valve; a discharge pipe is provided between the internal reactor and the external reactor, the discharge pipe is connected to the inside and outside of the external reactor and one end of the discharge pipe is placed at the lower end of the external reactor, and a discharge pump and a discharge valve are installed on the discharge pipe.

[0012] A preferred technical solution is that a vertical guiding device is provided between the inner reactor and the outer reactor.

[0013] The preferred technical solution is that temperature sensors are provided at the liquid inlet pipe and the liquid outlet pipe.

[0014] A preferred technical solution is that the outer reactor is also provided with a liquid receiving tank.

[0015] Compared with the prior art, the present invention designs the reactor as a split structure that is mutually connected, and the discharge pipe is located between the inner reactor and the outer reactor, and the lower end is placed in the alkali solution. There is no need to set a discharge port at the bottom of the reactor, so that the bottom of the outer reactor is complete, the structure is simple, and the manufacturing is easy. On the one hand, the outer reactor has improved corrosion resistance due to the lack of an interface. On the other hand, if the outer reactor that has been in contact with high temperature and strong alkali for a long time has corrosion, it only needs to be replaced and the inner reactor can be retained for continued use, which greatly reduces the maintenance cost of the device; at the same time, the present invention sets a scale on the side wall of the inner reactor, and the generated hydrogen buoyancy will push the upper reactor to float up. By observing the changing scale, the hydrogen generation rate, the amount of hydrogen in the reactor and the liquid level can be calculated, thereby controlling the liquid inlet or discharge amount, and realizing the control of the hydrogen reaction rate. There is no need to set an alkali solution temperature sensor, a non-polar organic solvent temperature sensor, and a liquid level meter that can detect the liquid level of the alkali solution and the non-polar organic solvent in the reactor, which reduces the maintenance cost of the device and improves the reliability of the device operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of an embodiment of the utility model. DETAILED DESCRIPTION

[0017] The utility model is a device for converting a sodium source into hydrogen energy and heat energy online, which is provided with a reactor, wherein the reactor is composed of an inner reactor 1 with an open lower end and an outer reactor 2 with an open upper end, wherein the inner reactor 1 and the outer reactor 2 are both made of corrosion-resistant materials such as glass and stainless steel, wherein the inner reactor 1 is placed in the outer reactor 2 and a certain distance is left between the two to ensure that the inner reactor 1 can move up and down with the pressure of the gas inside it; wherein the upper end of the inner reactor 1 is provided with a hydrogen collecting pipe 1-1 and a sodium injection port 1-2, wherein the hydrogen collecting pipe 1-1 is provided with a pressure reducing valve 1-1-1 for collecting hydrogen generated by the sodium-water reaction, wherein the hydrogen is used after condensation and adsorption purification, and the sodium injection port 1-2 is used for inputting metallic sodium as a raw material for the reaction. A heat exchanger 1-3 is also fixed in the reactor 1, wherein the two ends of the heat exchanger 1-3 are respectively connected with a liquid inlet pipe 1-3-1 and a liquid outlet pipe 1-3-2, and are used for inputting a refrigerant to realize gas heat exchange with the inner reactor 1 and output heat energy. The outer wall of the inner reactor 1 is provided with liquid level scales 1-4 for measuring the up and down displacement and speed of the inner reactor 1;

[0018] The bottom surface of the outer reactor 2 is provided with a mesh sodium stacker 2-1 placed below the sodium injection port 1-2, i.e., a mesh container for receiving the raw material metallic sodium injected from the sodium injection port 1-2;

[0019] The outer reactor 2 is connected to the injection pipe 3, and there is an injection valve 3-1 on the injection pipe 3. An injection pump can also be installed as needed. It can be fixed on the inner reactor 1 or placed between the inner reactor 1 and the outer reactor 2. A discharge pipe 4 is provided between the inner reactor 1 and the outer reactor 2. The discharge pipe 4 connects the inside and outside of the outer reactor 2 and one end of the discharge pipe 4 is placed at the lower end of the outer reactor 2 (for example, 10 mm from the bottom). A discharge pump 4-1 and a discharge valve 4-2 are installed on the discharge pipe 4.

[0020] It is best to provide a vertical guiding device 5, such as a guide rail, a guide wheel, etc., between the inner reactor 1 and the outer reactor 2 to prevent the inner reactor 1 from tilting when moving up and down; a temperature sensor 6 is provided at the liquid inlet pipe 1-3-1 and the liquid outlet pipe 1-3-2 to monitor the heat exchange rate of the heat exchanger 1-3; a liquid receiving tank 7 is also provided outside the outer reactor 2, that is, the outer reactor 2 is placed on the liquid receiving tank 7. If a small amount of liquid leaks between the inner reactor 1 and the outer reactor 2, it can flow into the liquid receiving tank 7 to avoid contaminating the ground.

[0021] The operation is carried out in the following steps:

[0022] Step 1. Inject a non-polar organic solvent (paraffin, kerosene, etc.) into the outer reactor 2, put the raw material metal sodium into the mesh sodium stack 2-1 and then place it in the center of the outer reactor 2, buckle the inner reactor 1 outside the mesh sodium stack 2-1 and place it on the bottom surface of the outer reactor 2;

[0023] Step 2. Open the injection valve 3-1 and inject water into the outer reactor 2. The water is located below the non-polar organic solvent and reacts with the metallic sodium to generate sodium hydroxide and hydrogen. The sodium hydroxide enters the water to form an alkaline solution, and the hydrogen rises to the inner reactor 1. As the amount of hydrogen generated increases, the pressure increases. When the increased pressure is less than the opening pressure of the pressure reducing valve 1-1-1, the inner reactor 1 floats up. When the pressure is greater than the opening pressure of the pressure reducing valve 1-1-1, the pressure reducing valve 1-1-1 opens, the generated hydrogen is discharged from the hydrogen collecting pipe 1-1, and the inner reactor 1 descends.

[0024] During the rising or falling process of the inner reactor 1, the liquid surface or the mark on the outer reactor 2 can be used as a reference point to observe the changes in the liquid level scale 1-4 on the side wall, so as to calculate the hydrogen production rate, the amount of hydrogen in the reactor and the liquid level, thereby controlling the feed amount, liquid intake or discharge amount, and realizing the control of the hydrogen reaction rate.

Claims

1. A device for online conversion of a sodium source into hydrogen energy and thermal energy, comprising a reactor, characterized in that: The reactor is composed of an inner reactor (1) with an open lower end and an outer reactor (2) with an open upper end, wherein the inner reactor (1) is placed inside the outer reactor (2) and can move up and down; The upper end of the inner reactor (1) is provided with a hydrogen collecting pipe (1-1) and a sodium injection port (1-2); the hydrogen collecting pipe (1-1) is provided with a pressure reducing valve (1-1-1); a heat exchanger (1-3) is also fixed in the reactor (1); the two ends of the heat exchanger (1-3) are respectively connected to a liquid inlet pipe (1-3-1) and a liquid outlet pipe (1-3-2); and the outer wall of the inner reactor (1) is provided with a liquid level scale (1-4); A mesh sodium stacker (2-1) is provided on the bottom surface of the outer reactor (2) and is placed below the sodium injection port (1-2); The outer reactor (2) is connected to the injection pipe (3), and the injection pipe (3) is provided with an injection valve (3-1); a discharge pipe (4) is provided between the inner reactor (1) and the outer reactor (2), the discharge pipe (4) is connected to the inside and outside of the outer reactor (2) and one end of the discharge pipe (4) is placed at the lower end of the outer reactor (2), and a discharge pump (4-1) and a discharge valve (4-2) are installed on the discharge pipe (4).

2. The device for online conversion of sodium source into hydrogen energy and thermal energy according to claim 1, characterized in that: A vertical guide device (5) is provided between the inner reactor (1) and the outer reactor (2).

3. The device for online conversion of sodium source into hydrogen energy and thermal energy according to claim 1 or 2, characterized in that: Temperature sensors (6) are provided at the liquid inlet pipe (1-3-1) and the liquid outlet pipe (1-3-2).

4. The device for online conversion of sodium source into hydrogen energy and thermal energy according to claim 3, characterized in that: The outer reactor (2) is also provided with a liquid receiving tank (7).

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