阅读说明：本技术 一种碱金属种子注入装置 (Alkali metal seed injection device ) 是由 刘保林 李建 夏琦 彭爱武 于 2019-10-08 设计创作，主要内容包括：一种碱金属种子注入装置,包括电加热器(1)、碱金属注入管(2)、碱金属储罐(3)、气体驱动旋风分离器(4)、液位监测传感器(5)、驱动气体储罐(6)、驱动气体入口管(7)、温度压力监测及控制装置(9)和混合气体出口管路(12)。碱金属种子注入装置为圆筒形,侧壁为夹层结构,夹层内外壁之间为腔室,电加热器(1)位于腔室内。向气体驱动旋风分离器(4)注入液态碱金属后加热,通入驱动气体工质使碱金属快速雾化,最后气化。液位监测传感器(5)监测液态碱金属的气化状态,温度压力监测及控制装置(9)控制混合气体状态,在驱动气体工质的作用下,打开混合气体出口管路(12)通过主气流管路(13)将混合工质送入磁流体发电机发电。(An alkali metal seed injection device comprises an electric heater (1), an alkali metal injection pipe (2), an alkali metal storage tank (3), a gas-driven cyclone separator (4), a liquid level monitoring sensor (5), a driving gas storage tank (6), a driving gas inlet pipe (7), a temperature and pressure monitoring and controlling device (9) and a mixed gas outlet pipeline (12). The alkali metal seed injection device is cylindrical, the side wall of the alkali metal seed injection device is of a sandwich structure, a cavity is arranged between the inner wall and the outer wall of the sandwich, and the electric heater (1) is positioned in the cavity. Liquid alkali metal is injected into the gas-driven cyclone separator (4) and then heated, and driving gas working medium is introduced to rapidly atomize the alkali metal and finally gasify the alkali metal. The liquid level monitoring sensor (5) monitors the gasification state of the liquid alkali metal, the temperature and pressure monitoring and controlling device (9) controls the state of the mixed gas, and the mixed gas outlet pipeline (12) is opened to send the mixed working medium into the magnetohydrodynamic generator for power generation through the main gas flow pipeline (13) under the action of the driving gas working medium.)

1. An alkali metal seed injection device, characterized in that: the alkali metal seed injection device comprises an electric heater (1), an alkali metal injection pipe (2), an alkali metal storage tank (3), a gas-driven cyclone separator (4), a liquid level monitoring sensor (5), a driving gas storage tank (6), a driving gas inlet pipe (7), a temperature and pressure monitoring and controlling device (9) and a mixed gas outlet pipeline (12); the alkali metal seed injection device is cylindrical, the side wall of the device is of a sandwich structure, and a cavity is formed between the inner wall (10) and the outer wall (11) of the sandwich; the electric heater (1) is positioned in the chamber on the side wall and used for heating and driving the gas working medium and the alkali metal seeds; the mixed gas outlet pipeline (12) is positioned at the top of the alkali metal seed injection device; the bottom of the alkali metal seed injection device is provided with a driving gas inlet pipe (7); a gas-driven cyclone separator (4) is arranged inside the cylinder of the alkali metal seed injection device, and the gas-driven cyclone separator (4) is fixed at the bottom of the cylinder through a support; the liquid level monitoring sensor (5) is arranged on the gas-driven cyclone separator (4);

one end of the alkali metal injection pipe (2) penetrates out of the top of the alkali metal injection device and is connected with an alkali metal storage tank (3) above the alkali metal seed injection device, and the other end of the alkali metal injection pipe (2) penetrates into the alkali metal seed injection device and is connected with a gas-driven cyclone separator (4);

the mixed gas outlet pipeline (12) is positioned at the top of the alkali metal seed injection device, one end of the mixed gas outlet pipeline (12) is connected with the gas driving cyclone separator (4), and the other end of the mixed gas outlet pipeline penetrates out of the alkali metal seed injection device and is connected with a main gas flow pipeline (13) outside the alkali metal seed injection device; the main gas pipeline (13) is connected to the magnetohydrodynamic generator;

one end of the driving gas inlet pipe (7) is connected to a driving gas storage tank (6) outside the alkali metal seed injection device, and the other end of the driving gas inlet pipe (7) penetrates into the alkali metal seed injection device and is connected with the gas-driven cyclone separator (4);

the control valves (8) are respectively arranged on a connecting pipeline between the alkali metal storage tank (3) and the gas-driven cyclone separator (4), a connecting pipeline between the driving gas storage tank (6) and the gas-driven cyclone separator (4), and a connecting pipeline between the main gas flow pipeline (13) and the gas-driven cyclone separator (4);

and a temperature and pressure monitoring and controlling device (9) is arranged in an inner barrel chamber of the alkali metal seed injection device.

2. The alkali metal seed injection apparatus of claim 1, wherein: the gas-driven cyclone separator (4) is made of high-strength metal materials.

3. The alkali metal seed injection apparatus of claim 1, wherein: a driving gas working medium is introduced from a driving gas inlet pipe (7) at the bottom of the alkali metal seed injection device, air in a connecting pipeline between a driving gas storage tank (6) and the gas driving cyclone separator (4) is discharged, and then a corresponding control valve (8) is closed; injecting alkali metal seeds into the gas-driven cyclone separator (4) through the alkali metal seed injection pipe (2), and closing a control valve on a connecting pipeline between the alkali metal storage tank (3) and the gas-driven cyclone separator (4) after the injection is finished; starting the electric heater (1), heating the gas in the gas-driven cyclone separator (4) to 700 ℃ to gasify the alkali metal seeds; after the liquid level monitoring sensor (5) observes that the alkali metal is completely gasified, a driving gas working medium is injected into the gas driving cyclone separator (4) through the driving gas inlet pipe (7), the gasified gas of the alkali metal seeds is mixed with the driving gas working medium, and the formed mixed gas is discharged from the mixed gas outlet pipe (12) and enters the main gas flow pipeline (13) to realize magnetohydrodynamic power generation; the temperature and pressure monitoring and controlling device (9) monitors the state parameters of the mixed gas in real time.

Technical Field

The invention relates to the technical field of magnetofluid power generation, in particular to an alkali metal seed injection device.

Background

Magnetohydrodynamic electricity generation is a novel electricity generation method for directly converting heat energy into electric energy, and starts in the later stage of 50 years in the 20 th century. The basic operating principle is faraday's law of electromagnetic induction. Compared with the traditional power generation, the power generation device adopts the conductive fluid to replace conductive solid for conduction, so that the conductive fluid working medium passes through a magnetic field which is vertical to the flow direction at a certain speed, cuts magnetic lines of force to induce electromotive force, and further generates electric energy.

High temperature gas magnetohydrodynamic power generation is an important mode. In order to obtain a sufficiently high conductivity of the high-temperature gas working medium, a certain amount of alkali metal ionization seeds need to be injected into the working medium, and the seeds need to be uniformly distributed, rapidly heated, gasified and fully ionized when the fluid working medium is injected. Therefore, the alkali metal seed injection device is an important device for realizing the magnetohydrodynamic power generation of the high-temperature gas. However, alkali metals are very chemically reactive, and therefore are prone to react with most substances, especially with water, and therefore the technical requirements for seed injection devices are relatively strict. At present, many foreign researches on a seed injection device are in a test stage, and a typical representative is an alkali metal seed injection system of the university of tokyo industry, japan, which heats alkali metal seeds by a cesium furnace and transports the alkali metal seeds by gas, and such a device has problems of inaccurate cesium seed injection amount, unstable transport gas pressure control, and the like, as shown in fig. 2. China is basically blank in this respect. The device for injecting alkali metal seeds by adopting the gas-driven cyclone separator at home and abroad has not been reported in documents, so that the development of the gas-driven alkali metal seed injection device has important significance for improving the performance and practical application of the magnetohydrodynamic generator.

Disclosure of Invention

In order to overcome the defects in the prior art, the invention provides the alkali metal seed injection device, which can realize controllable injection of alkali metal seeds, complete gasification and easy realization of high-quality mixed gas.

The alkali metal seed injection device mainly comprises an electric heater, an alkali metal injection pipe, an alkali metal storage tank, a gas-driven cyclone separator, a liquid level monitoring sensor, a driving gas storage tank, a driving gas inlet pipe, a control valve, a temperature and pressure monitoring and controlling device and a mixed gas outlet pipe.

The alkali metal seed injection device is cylindrical, the side wall of the device is of a sandwich structure, and a cavity is formed between the inner wall and the outer wall of the sandwich. The electric heater is positioned in the chamber on the side wall and used for heating and driving the gas working medium and the alkali metal seeds. The mixed gas outlet pipe is positioned at the top of the alkali metal injection device. The bottom of the alkali metal seed injection device is provided with a driving gas inlet pipe; and a gas-driven cyclone separator is arranged in the cylinder of the alkali metal seed injection device and is fixed at the bottom of the chamber through a support. The liquid level monitoring sensor is arranged on the gas-driven cyclone separator.

One end of the alkali metal injection pipe penetrates out of the top of the alkali metal seed injection device and is connected with an alkali metal storage tank positioned above the device, and the other end of the alkali metal injection pipe penetrates into the alkali metal seed injection device and is connected with the gas-driven cyclone separator.

One end of the mixed gas outlet pipe is connected with the gas-driven cyclone separator, and the other end of the mixed gas outlet pipe penetrates out of the alkali metal seed injection device and is connected with a main gas flow pipeline outside the alkali metal seed injection device. The main gas pipeline is connected with the magnetofluid generator.

One end of the driving gas inlet pipe is connected to a driving gas storage tank outside the alkali metal seed injection device, and the other end of the driving gas inlet pipe penetrates into the alkali metal seed injection device and is connected with the gas driving cyclone separator.

The gas-driven cyclone separator is made of high-strength metal materials.

The control valves are respectively arranged on a connecting pipeline of the alkali metal storage tank and the gas-driven cyclone separator, a connecting pipeline of the driving gas storage tank and the gas-driven cyclone separator and a connecting pipeline of the main gas flow pipeline and the gas-driven cyclone separator.

And a temperature and pressure monitoring and controlling device is arranged in the cavity of the inner cylinder of the alkali metal seed injection device.

The invention has the beneficial effects that:

(1) the amount of alkali metal seeds injected into the gas-driven cyclone separator can be controlled through the liquid alkali metal injection pipe, so that the accuracy of the injection amount is realized, and the seed proportion of high-temperature gas plasma is ensured.

(2) And detecting the alkali metal in the injected gas driven cyclone separator by using a liquid level monitoring sensor, and monitoring the gasification state of the liquid alkali metal.

(3) The alkali metal seeds are gasified in the cyclone separator by the driving gas and then mixed with the alkali metal seeds to form mixed gas, so that the uniformity of the alkali metal seeds in the main gas flow pipeline can be improved, the quality is improved, and the conductivity of the main gas flow can be obviously improved.

Drawings

FIG. 1 is a schematic diagram showing the structure of an apparatus according to an embodiment of the present invention;

in the figure: 1 electric heater, 2 alkali metal filling pipes, 3 alkali metal storage tanks, 4 gas-driven cyclone separators, 5 liquid level monitoring sensors, 6 driving gas storage tanks, 7 driving gas inlet pipes, 8 control valves, 9 temperature and pressure monitoring and controlling devices, 10 interlayer inner walls, 11 interlayer outer walls, 12 mixed gas outlet pipelines and 13 main gas flow pipelines.

FIG. 2 is a schematic diagram showing a typical conventional alkali metal seed injection apparatus;

in the figure: 14 gas inlet, 15 valves, 16 cesium furnace and 17 mixed gas outlet pipeline.

Detailed Description

The invention is further described with reference to the following figures and detailed description.

As shown in figure 1, the alkali metal seed injection device of the invention is cylindrical, the side wall of the device is of a sandwich structure, and a chamber is formed between an inner sandwich wall 10 and an outer sandwich wall 11. The electric heater 1 is positioned in the chamber of the side wall and used for heating and driving the gas working medium and the alkali metal seeds. The bottom of the alkali metal seed injection device is provided with a driving gas inlet pipe 7; the inside of the alkali metal seed injection device cylinder is provided with a gas-driven cyclone separator 4, and the gas-driven cyclone separator 4 is fixed at the bottom of the cylinder through a support. A level monitoring sensor 5 is arranged on the gas-driven cyclone 4.

One end of the alkali metal injection pipe 2 penetrates out of the top of the alkali metal seed injection device and is connected with an alkali metal storage tank 3 above the alkali metal seed injection device, and the other end of the alkali metal injection pipe penetrates into the alkali metal seed injection device and is connected with a gas-driven cyclone separator 4.

The mixed gas outlet pipeline 12 is positioned at the top of the alkali metal seed injection device, one end of the mixed gas outlet pipeline 12 is connected with the gas-driven cyclone separator 4, and the other end of the mixed gas outlet pipeline passes through the alkali metal seed injection device and is connected with a main gas flow pipeline 13 outside the alkali metal seed injection device. The main gas pipeline 13 is connected with the magnetofluid generator.

One end of the driving gas inlet pipe 7 is connected to a driving gas storage tank 6 outside the alkali metal seed injection device, and the other end of the driving gas inlet pipe 7 penetrates into the alkali metal seed injection device and is connected with the gas-driven cyclone separator 4.

The gas-driven cyclone separator 4 is made of high-strength metal material.

The control valves 8 are respectively arranged on a connecting pipeline between the alkali metal storage tank 3 and the gas-driven cyclone separator 4, a connecting pipeline between the driving gas storage tank 6 and the gas-driven cyclone separator 4, and a connecting pipeline between the main gas flow pipeline 13 and the gas-driven cyclone separator 4.

And a temperature and pressure monitoring and controlling device 9 is arranged in the inner cylinder chamber of the alkali metal seed injection device.

The working process of the invention is as follows:

and introducing a driving gas working medium argon from a driving gas inlet pipe 7 at the bottom of the alkali metal seed injection device, discharging air in a connecting pipeline between a driving gas storage tank 6 and the gas driving cyclone separator 4, and then closing a corresponding control valve 8. Injecting alkali metal seeds into the gas-driven cyclone separator 4 through the alkali metal injection pipe 2 according to the required dosage, and closing a control valve 8 on a connecting pipeline between the alkali metal storage tank 3 and the gas-driven cyclone separator 4 after the injection is finished; and then, starting the electric heater 1, heating the gas in the gas-driven cyclone separator 4 to about 700 ℃ to gasify the alkali metal seeds, observing that the alkali metal seeds are completely gasified by the liquid level monitoring sensor 5, injecting a driving gas working medium into the gas-driven cyclone separator 4 through the driving gas inlet pipe 7, mixing the gasified gas of the alkali metal seeds with the driving gas working medium, discharging the formed mixed gas from the mixed gas outlet pipe 12, and allowing the mixed gas to enter the main gas flow pipeline 13, thereby realizing the magnetohydrodynamic power generation. The temperature and pressure monitoring and controlling device 9 monitors the state parameters of the mixed gas in real time.