阅读说明：本技术 一种封闭容器的除氢系统 (Dehydrogenation system of closed container ) 是由 俞高伟 申鹏 韩峰 张辉 吴珂科 于 2020-06-12 设计创作，主要内容包括：本发明涉及一种封闭容器的除氢系统,属于安全生产技术领域。包括封闭容器、燃料电池氢气侧出口电磁阀、燃料电池氢气侧出口压力传感器、氢燃料电池、鼓风机、氢泵、燃料电池氢气侧入口电磁阀、封闭容器压力传感器和电气控制系统；本发明利用氢燃料电池反应氢气的能力设计了旨在解决封闭系统氢气积聚问题的除氢系统。本发明可以根据封闭容器内部氢气浓度的变化,实时调整除氢系统的运行状态,只要浓度超过警告值,就可以打开系统消除氢气,直至容器内氢气浓度降至安全范围内,有效降低容器内由于氢气积聚带来的安全风险,有利于封闭的电化学系统安全稳定运行。(The invention relates to a dehydrogenation system of a closed container, belonging to the technical field of safe production. The system comprises a closed container, a fuel cell hydrogen side outlet electromagnetic valve, a fuel cell hydrogen side outlet pressure sensor, a hydrogen fuel cell, a blower, a hydrogen pump, a fuel cell hydrogen side inlet electromagnetic valve, a closed container pressure sensor and an electric control system; the invention designs a dehydrogenation system aiming at solving the problem of hydrogen accumulation of a closed system by utilizing the capability of a hydrogen fuel cell for reacting hydrogen. The invention can adjust the running state of the dehydrogenation system in real time according to the change of the hydrogen concentration in the closed container, and can open the system to eliminate hydrogen as long as the concentration exceeds the warning value until the hydrogen concentration in the container is reduced to a safe range, thereby effectively reducing the safety risk caused by hydrogen accumulation in the container and being beneficial to the safe and stable running of the closed electrochemical system.)

1. A closed container dehydrogenation system, comprising: the system comprises a closed container, a fuel cell hydrogen side outlet electromagnetic valve, a fuel cell hydrogen side outlet pressure sensor, a hydrogen fuel cell, a blower, a hydrogen pump, a fuel cell hydrogen side inlet electromagnetic valve, a closed container pressure sensor and an electric control system; the closed container is connected with a hydrogen fuel cell through a hydrogen pump, and the hydrogen fuel cell is connected with the closed container through a fuel cell hydrogen side outlet electromagnetic valve; the hydrogen fuel cell is provided with an air blower, one end of the air blower is provided with an air inlet end, and the hydrogen fuel cell is provided with an air outlet end; the closed container is provided with a closed container pressure sensor; a fuel cell hydrogen side inlet electromagnetic valve is arranged between the closed container and the hydrogen pump; a fuel cell hydrogen side outlet pressure sensor is arranged between the hydrogen fuel cell and the fuel cell hydrogen side outlet electromagnetic valve; and the electrical control system is connected with the blower, the hydrogen pump, the fuel cell hydrogen side outlet electromagnetic valve, the fuel cell hydrogen side outlet pressure sensor, the fuel cell hydrogen side inlet electromagnetic valve and the closed container pressure sensor.

2. A closed vessel dehydrogenation system as set forth in claim 1 wherein: a ball valve is arranged between the closed container and the fuel cell hydrogen side outlet electromagnetic valve; a temperature sensor is arranged in the closed container; a liquid level sensor is arranged in the closed container.

3. A closed vessel dehydrogenation system as set forth in claim 2 wherein: the hydrogen pump is provided with an explosion-proof functional component.

4. A closed vessel dehydrogenation system as set forth in claim 3 wherein: the closed container pressure sensor is connected with the hydrogen pump through an electrical control system and used for controlling the pressure in the closed container to be in a micro-positive pressure state; and the fuel cell hydrogen side outlet pressure sensor is connected with the fuel cell hydrogen side outlet electromagnetic valve through an electric control system.

5. A closed vessel dehydrogenation system as set forth in claim 4 wherein: and the closed container is internally provided with a hydrogen concentration analysis module which is used for analyzing and calculating the hydrogen concentration in the closed container according to the value of the electric energy generated by the fuel cell and the hydrogen evolution reaction generated by the electrochemical system and the pressure and temperature conditions of the closed container to obtain the hydrogen concentration in the closed container.

6. A closed vessel dehydrogenation system as set forth in claim 5 wherein: and a temperature measuring resistor for detecting the temperature of the hydrogen fuel cell is arranged in the air side gap of the central electrode of the hydrogen fuel cell.

7. A closed vessel dehydrogenation system as set forth in claim 6 wherein: the electrical control system comprises a PLC control module, a temperature measuring resistor, a PWM speed regulator, a blower and a hydrogen concentration analysis module in the closed container; the temperature measuring resistor, the PWM speed regulator and the hydrogen concentration analysis module in the closed container are connected with the PLC control module; the PLC control module is connected with the hydrogen pump and the blower power supply control part; the temperature measuring resistor is connected with a PWM speed regulator which is arranged on the air blower and used for controlling the rotating speed of the air blower through a PLC control module.

8. A closed vessel dehydrogenation system as set forth in claim 7 wherein: the hydrogen concentration analysis module in the closed container is connected with the pressure sensor of the closed container; the hydrogen concentration analysis module in the closed container is connected with the fuel cell hydrogen side outlet electromagnetic valve, the hydrogen fuel cell, the blower, the hydrogen pump and the fuel cell hydrogen side inlet electromagnetic valve through the PLC control module.

Technical Field

The invention relates to a dehydrogenation system of a closed container, belonging to the technical field of safe production.

Background

In the field of the electrochemical industry, in the case of production operations of interest, in addition to obtaining the desired substance or performing the necessary function, numerous side reactions occur, of which the hydrogen evolution reaction is a type of reaction that must be taken into account; the product hydrogen of the reaction is combustible and explosive, and if hydrogen evolution reaction occurs in a closed system, the continuously generated hydrogen is gradually accumulated to form potential safety hazard, so that the closed system bears greater safety and economic risks. Therefore, in the electrochemical industrial production process in which the hydrogen evolution reaction is likely to occur, how to remove the hydrogen which is continuously generated and accumulated and reduce the operation risk of the system is of great significance. In electrochemical industrial systems in which hydrogen evolution reactions occur, metal deposition reaction systems and battery systems are more typical. Taking a battery system as an example, in the process of charging and storing energy by a battery, certain hydrogen can be separated out in a charging reaction, if the battery system is a closed system, the whole system can be equivalent to a closed container which is continuously subjected to the hydrogen separation reaction, when the concentration of the hydrogen stored in the container reaches a certain degree, potential safety hazards can be formed, the safe operation of the whole battery system is endangered, and if the hydrogen in the closed system cannot be timely and effectively treated, the system can bear huge safety risks and economic risks. At present, aiming at the problem of hydrogen accumulation in a closed system, most of the measures are taken by using nitrogen to purge so as to reduce the hydrogen concentration in the container, the method has large loss to the nitrogen, and the hydrogen concentration in the container is difficult to monitor and can only be purged regularly, thus causing great waste. In addition, the gas phase space in the closed container is directly pumped and discharged to the atmospheric environment for dilution, so that other polluted gases generated by the electrochemical system can be discharged into the atmosphere during treatment, and great air pollution and substance waste are caused. Therefore, the measures which can be taken at present have certain defects, and aiming at the problem of hydrogen accumulation of a closed system, a system which is low in cost, convenient to control and capable of efficiently and environmentally removing hydrogen is needed in the technical field.

Disclosure of Invention

The invention aims to solve the technical problem of how to adopt a method which has low cost, is convenient to control and can eliminate hydrogen in a closed system in an efficient and environment-friendly way.

In order to solve the above problems, the present invention provides a dehydrogenation system for a closed container, which comprises a closed container, a fuel cell hydrogen side outlet electromagnetic valve, a fuel cell hydrogen side outlet pressure sensor, a hydrogen fuel cell, a blower, a hydrogen pump, a fuel cell hydrogen side inlet electromagnetic valve, a closed container pressure sensor and an electrical control system; the closed container is connected with a hydrogen fuel cell through a hydrogen pump, and the hydrogen fuel cell is connected with the closed container through a fuel cell hydrogen side outlet electromagnetic valve; the hydrogen fuel cell is provided with an air blower, one end of the air blower is provided with an air inlet end, and the hydrogen fuel cell is provided with an air outlet end; the closed container is provided with a closed container pressure sensor; a fuel cell hydrogen side inlet electromagnetic valve is arranged between the closed container and the hydrogen pump; a fuel cell hydrogen side outlet pressure sensor is arranged between the hydrogen fuel cell and the fuel cell hydrogen side outlet electromagnetic valve; and the electrical control system is connected with the blower, the hydrogen pump, the fuel cell hydrogen side outlet electromagnetic valve, the fuel cell hydrogen side outlet pressure sensor, the fuel cell hydrogen side inlet electromagnetic valve and the closed container pressure sensor.

Preferably, a ball valve is arranged between the closed container and the hydrogen side outlet electromagnetic valve of the fuel cell; a temperature sensor is arranged in the closed container; a liquid level sensor is arranged in the closed container.

Preferably, the hydrogen pump is provided with an explosion-proof functional component.

Preferably, the closed container pressure sensor is connected with the hydrogen pump through an electrical control system to control the pressure in the closed container to be in a micro-positive pressure state; and the fuel cell hydrogen side outlet pressure sensor is connected with the fuel cell hydrogen side outlet electromagnetic valve through an electric control system.

Preferably, the closed container is provided with a hydrogen concentration analysis module in the closed container, wherein the hydrogen concentration analysis module is used for analyzing and calculating the hydrogen concentration in the closed container according to the value of the electric energy generated by the fuel cell and the hydrogen evolution reaction generated by the electrochemical system and according to the pressure and temperature conditions of the closed container.

Preferably, a temperature measuring resistor for detecting the temperature of the hydrogen fuel cell is arranged in the air side gap of the center electrode of the hydrogen fuel cell.

Preferably, the electrical control system comprises a PLC control module, a temperature measuring resistor, a Pulse Width Modulation (PWM) speed regulator, a blower and a hydrogen concentration analysis module in the closed container; the temperature measuring resistor, the PWM speed regulator and the hydrogen concentration analysis module in the closed container are connected with the PLC control module; the PLC control module is connected with the hydrogen pump and the blower power supply control part; the temperature measuring resistor is connected with a PWM speed regulator which is arranged on the air blower and used for controlling the rotating speed of the air blower through a PLC control module.

Preferably, the hydrogen concentration analysis module in the closed container is connected with a closed container pressure sensor; the hydrogen concentration analysis module in the closed container is connected with the fuel cell hydrogen side outlet electromagnetic valve, the hydrogen fuel cell, the blower, the hydrogen pump and the fuel cell hydrogen side inlet electromagnetic valve through the PLC control module.

Compared with the prior art, the invention has the following beneficial effects:

1. the invention realizes the real-time monitoring of the hydrogen concentration in the closed container of the electrochemical reaction system and eliminates part of hydrogen according to the concentration condition, so that the concentration is kept in a safe range, and the operation safety of the closed system is improved.

2. The invention has the advantages of small change of the original closed system for production in structural process, low installation cost, high automation degree of the dehydrogenation process, no need of human intervention, good dehydrogenation effect and good selection of the closed system which is easy to generate hydrogen accumulation.

Drawings

FIG. 1 is a process flow diagram of a closed vessel dehydrogenation system of the present invention;

the arrows in the figure show the direction of the pipeline medium flow;

FIG. 2 is a schematic diagram of the electrical portion of the dehydrogenation system of the present invention;

FIG. 3 is a schematic diagram of the logic of the dehydrogenation system linkage according to the present invention;

reference numerals: 1. closing the container; 2. a temperature sensor; 3. a ball valve; 4. a fuel cell hydrogen side outlet solenoid valve; 5. a fuel cell hydrogen side outlet pressure sensor; 6. a hydrogen fuel cell; 7. a blower; 8. a hydrogen pump; 9. a fuel cell hydrogen side inlet solenoid valve; 10. a closed vessel pressure sensor; 11. a liquid level sensor;

Detailed Description

In order to make the invention more comprehensible, preferred embodiments are described in detail below with reference to the accompanying drawings:

as shown in fig. 1-3, the present invention provides a hydrogen removal system for a closed container, comprising a closed container 1, a fuel cell hydrogen side outlet electromagnetic valve 4, a fuel cell hydrogen side outlet pressure sensor 5, a hydrogen fuel cell 6, a blower 7, a hydrogen pump 8, a fuel cell hydrogen side inlet electromagnetic valve 9, a closed container pressure sensor 10 and an electrical control system; the closed container 1 is connected with a hydrogen fuel cell 6 through a hydrogen pump 8, and the hydrogen fuel cell 6 is connected with the closed container 1 through a fuel cell hydrogen side outlet electromagnetic valve 4; the hydrogen fuel cell 6 is provided with an air blower 7, one end of the air blower 7 is provided with an air inlet end, and the hydrogen fuel cell 6 is provided with an air outlet end; the closed container 1 is provided with a closed container pressure sensor 10; a fuel cell hydrogen side inlet electromagnetic valve 9 is arranged between the closed container 1 and the hydrogen pump 8; a fuel cell hydrogen side outlet pressure sensor 5 is arranged between the hydrogen fuel cell 6 and the fuel cell hydrogen side outlet electromagnetic valve 4; the electrical control system is connected to a blower 7, a hydrogen pump 8, a fuel cell hydrogen side outlet electromagnetic valve 4, a fuel cell hydrogen side outlet pressure sensor 5, a fuel cell hydrogen side inlet electromagnetic valve 9, and a closed container pressure sensor 10. A ball valve 3 is arranged between the closed container 1 and the fuel cell hydrogen side outlet electromagnetic valve 4; a temperature sensor 2 is arranged in the closed container 1; a liquid level sensor 11 is arranged in the closed container 1. The hydrogen pump 8 is provided with an explosion-proof function component. The closed container pressure sensor 5 is connected with the hydrogen pump 8 through an electrical control system to control the pressure in the closed container 1 to be in a micro-positive pressure state; the fuel cell hydrogen side outlet pressure sensor 5 is connected to the fuel cell hydrogen side outlet electromagnetic valve 4 through an electric control system. The closed container 1 is provided with a hydrogen concentration analysis module in the closed container, wherein the hydrogen concentration analysis module can be used for analyzing and calculating the hydrogen concentration in the closed container according to the value of the electric energy generated by the fuel cell and the hydrogen evolution reaction generated by the electrochemical system and the pressure and temperature conditions of the closed container. A temperature measuring resistor for detecting the temperature of the hydrogen fuel cell is provided in the air-side gap of the center electrode of the hydrogen fuel cell 6. The electric control system comprises a PLC control module, a temperature measuring resistor, a PWM speed regulator, a blower 7 and a hydrogen concentration analysis module in the closed container; the temperature measuring resistor, the PWM speed regulator and the hydrogen concentration analysis module in the closed container are connected with the PLC control module; the PLC control module is connected with a power supply control part of the hydrogen pump 8 and the blower 7; the temperature measuring resistor is connected with a PWM speed regulator which is arranged on the blower 7 and used for controlling the rotating speed of the blower through a PLC control module. The hydrogen concentration analysis module in the closed container is connected with a closed container pressure sensor 10; the hydrogen concentration analysis module in the closed container is connected with the fuel cell hydrogen side outlet electromagnetic valve 4, the hydrogen fuel cell 6, the blower 7, the hydrogen pump 8 and the fuel cell hydrogen side inlet electromagnetic valve 9 through the PLC control module.

The invention aims to solve the technical problems that hydrogen accumulation is caused by hydrogen evolution reaction in a closed system, so that safety risk is caused, and a hydrogen removal system which is low in cost, convenient to control and efficient and environment-friendly is lacked. In order to solve the problems, the technical scheme adopted by the invention is to provide a high-efficiency and environment-friendly dehydrogenation system, which comprises a process pipeline part and an electric control part; the process piping section includes a hydrogen pump 8, a blower 7, a hydrogen fuel cell 6, pressure sensors 5 and 10, electromagnetic valves 4 and 9, a ball valve 3, and a closed vessel 1 representing a closed system; the hydrogen pump 8 is required to have an explosion-proof function; the hydrogen fuel cell 6 is a main component for eliminating hydrogen, and can estimate the amount of consumed hydrogen according to the electric energy generated by the cell, thereby judging whether the hydrogen concentration in the closed container 1 meets the safety requirement; the pressure sensor 10 is positioned at the top of the closed container to measure the gas phase pressure in the container, and the pressure sensor 5 is positioned between the hydrogen side outlet of the hydrogen fuel cell and the electromagnetic valve to measure the internal pressure of the fuel cell; the running states of the pressure sensor 10 at the top of the closed container and the hydrogen pump 8 are designed in a linkage manner, so that the pressure in the container is in a micro-positive pressure state; the fuel cell hydrogen side outlet pressure sensor 5 requires to be interlocked with the electromagnetic valve 4, and jointly judges the on-off state of the electromagnetic valve 4; the electric control part comprises a PLC control module, a pt100 temperature measuring resistor, a PWM speed regulator, a hydrogen fuel cell blower, a load resistor and a hydrogen concentration analysis module in the closed container; the PLC control module is a power supply control part of a hydrogen pump 8 and a blower 7; the pt100 temperature measuring resistor is arranged in an air side gap of a central electrode of the hydrogen fuel cell 6, and is required to ensure a certain insertion depth to detect the temperature of the hydrogen fuel cell; the PWM speed regulator is a rotating speed controller of the blower 7, and changes the duty ratio of the driving pulse according to the temperature of the hydrogen fuel cell 6, thereby changing the rotating speed of the blower 7; the blower 7 requires adjustable blowing quantity and is interlocked with the temperature feedback value of the temperature measuring resistor; the hydrogen concentration analysis module in the closed container 1 is used for analyzing and calculating the hydrogen concentration in the container according to the value of the electric energy generated by the fuel cell and the hydrogen amount generated by the hydrogen evolution reaction of the electrochemical system and the pressure and temperature conditions of the container 1; the hydrogen concentration analysis module in the closed container 1 is required to be interlocked with the pressure sensor 10 on the container, the hydrogen pump 8, the hydrogen fuel cell 6 and the blower 7, so as to ensure that when the hydrogen concentration in the container is reduced to the safe concentration range, the hydrogen fuel cell 6 stops running, and the hydrogen pump 8, the blower 7 and the electromagnetic valves 4 and 9 are closed. The closed-loop feedback relationship between the rotating speed of the blower 7 and the temperature of the hydrogen fuel cell 6 is required, so that the problem that the temperature of the cell is too high and the heat dissipation is not timely is avoided, and the problem that the temperature of the hydrogen fuel cell 6 is too low due to excessive heat dissipation is avoided.

As shown in fig. 1, it is a process flow diagram of the dehydrogenation system provided by the present invention. The hydrogen removing system is arranged on a gas phase space pipeline of the closed system for generating hydrogen evolution reaction. The hydrogen fuel cell 6 continuously pumps hydrogen from the top of the closed container 1 through a hydrogen pump 8 for reaction, and adjusts the on-off state of the electromagnetic valve 4 according to the state of the fuel cell outlet pressure sensor 5, and sends reaction products back to the inside of the closed container 1. The air side of the hydrogen fuel cell 6 draws oxygen from the environment and discharges the product directly to the environment.

Fig. 2 is a schematic diagram of the electrical part of the dehydrogenation system. The temperature measuring resistor is arranged in the air side gap of the central electrode of the fuel cell and ensures a certain insertion depth, so that the temperature of the hydrogen fuel cell 1 is accurately measured; the blower 7 needs to adjust the blowing quantity according to the feedback value of the temperature measuring resistor; when the hydrogen fuel cell 6 stops operating, the blower 7 continues to operate for a period of time, so that the hydrogen in the fuel cell 1 is completely consumed, and the electromagnetic valves 4 and 9 are adjusted to be in a closed state.

FIG. 3 is a logic diagram showing the control of the elements of the dehydrogenation system. The control logic mainly comprises three control logics, wherein one control logic is to adjust the running state of the hydrogen pump 8 according to the state of the pressure sensor 10 of the closed container to ensure that the inside of the closed container 1 is micro-positive pressure; secondly, the on-off state of the electromagnetic valve 4 at the hydrogen side outlet of the fuel cell is adjusted according to the state of the pressure sensor 5 at the hydrogen side outlet of the fuel cell, so that the fuel cell 6 is ensured to fully react the sucked hydrogen, and the efficiency is improved; thirdly, the operation state of the whole dehydrogenation system is adjusted according to the hydrogen concentration state given by the hydrogen concentration analysis module in the closed container 1, including the states of the hydrogen fuel cell 6, the hydrogen pump 8, the blower 7, the electromagnetic valves 4 and 9.

The present invention designs a dehydrogenation system aiming at solving the problem of hydrogen accumulation in a closed system, mainly by utilizing the capability of the hydrogen fuel cell 6 to react hydrogen. The invention can adjust the running state of the hydrogen removal system in real time according to the change of the hydrogen concentration in the closed container 1, and can open the system to remove the hydrogen as long as the concentration exceeds the warning value until the hydrogen concentration in the container is reduced to a safe range, thereby effectively reducing the safety risk caused by hydrogen accumulation in the container and being beneficial to the safe and stable running of the closed electrochemical system.

The invention aims at solving the hydrogen gas of the closed system and accumulating the hydrogen system of the problem, apply the hydrogen fuel cell to the hydrogen gas elimination work of the closed container in the closed system, the process pipeline of the hydrogen system concrete assembly includes hydrogen fuel cell, hydrogen pump, air-blower, electromagnetic valve, pressure sensor, temperature pick-up and ball valve; the electrical control part comprises a PLC control module, a pt100 temperature measuring resistor, a PWM speed regulator, a hydrogen fuel cell blower, a load resistor and a hydrogen concentration analysis module. The PLC control module and the temperature measuring resistor have three main functions, wherein the PLC control module and the temperature measuring resistor control the blast volume of the blower according to the measured temperature of the hydrogen fuel cell stack to keep the hydrogen removal efficiency of the fuel cell; secondly, when the fuel cell is started to operate, the load capacity is gradually increased, and the service life of the fuel cell is effectively prolonged; and thirdly, when the fuel cell finishes the hydrogen removal work, stopping the hydrogen pump and closing the electromagnetic valve at the hydrogen side outlet of the fuel cell, properly prolonging the working time of the air blower, completely consuming the hydrogen in the fuel cell, and finally closing the air blower to stop the operation of the hydrogen removal system. The hydrogen analysis module in the closed container can convert and analyze the pressure and the temperature of the gas phase in the container, the hydrogen amount generated by the hydrogen evolution reaction of the closed system, the liquid level of the liquid phase in the container and the electric energy generated by the hydrogen removal system during operation to obtain the concentration of the hydrogen, and give an alarm prompt when the concentration is too high, so as to provide guidance for the normal operation and stop of the hydrogen removal system.

While the invention has been described with respect to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention. Those skilled in the art can make various changes, modifications and equivalent arrangements, which are equivalent to the embodiments of the present invention, without departing from the spirit and scope of the present invention, and which may be made by utilizing the techniques disclosed above; meanwhile, any changes, modifications and variations of the above-described embodiments, which are equivalent to those of the technical spirit of the present invention, are within the scope of the technical solution of the present invention.