CN219243321U - Safety hydrogen discharging device for hydrogen equipment replacement - Google Patents

Abstract

The utility model discloses a safety hydrogen discharging device for replacing hydrogen equipment, which comprises a container, wherein a water inlet component, an air inlet component and an air outlet are arranged on the container; the water inlet assembly comprises a water inlet interface and a control valve, the water inlet interface is arranged on the container and communicated with the inner cavity of the container, and the control valve is connected with the water inlet interface; the air inlet assembly comprises an air inlet interface and an air inlet pipeline, the air inlet interface is arranged on the container and is communicated with the inner cavity of the container, the air inlet pipeline is arranged in the container and is connected with the air inlet interface, and the lower end of the air inlet pipeline extends to the inner bottom of the container. The safe hydrogen discharging device for replacing the hydrogen equipment can be applied to the hydrogen equipment of the power plant, can ensure that the replacement and maintenance of the hydrogen equipment without the flame arrester function obtain the precondition of safety, further ensures the safe operation of the hydrogen equipment of the power plant, and simultaneously plays a powerful support for the safety guarantee of equipment operators.

Description

Safety hydrogen discharging device for hydrogen equipment replacement

Technical Field

The utility model relates to the technical field of nuclear power, in particular to a safe hydrogen discharging device for hydrogen equipment replacement.

Background

In the power production industry, large generators are one of the main devices of the power grid, being direct producers of electrical energy. The nuclear power adopts a high-capacity steam turbine generator, the temperature of a coil rod and the temperature of a coil can be greatly increased when the nuclear power is in operation, the intolerable degree can be reached, and then the enhanced cooling technology is needed to be adopted to improve the heat dissipation intensity, so that the temperature rise of each part of the motor is controlled within an allowable range, and the safe and reliable operation of the motor is ensured. Cooling technology is a guarantee of large capacity development. The cooling mode of the motor is divided into liquid cooling and air cooling. The air-cooled cooling medium includes air and hydrogen. The liquid cooling medium comprises water, oil, and Freon medium used for evaporative cooling, and novel pollution-free compound fluorocarbon medium. The turbo generator adopts a plurality of cooling modes including air cooling, hydrogen cooling, water cooling, oil cooling and evaporative cooling.

The turbo generator is essentially in a single air cooling stage before the end of the 30 s of the 20 world. When the single-machine capacity of the motor reaches a certain level, the air cooling technology is gradually insufficient in the aspects of efficiency, temperature rise and the like, and the steam turbine generator with the capacity of more than 50MW is gradually transited to hydrogen cooling at the end of 30 years in the 20 world. The specific gravity of hydrogen is small, the density of pure hydrogen is only 1/14 of that of air, the heat conductivity coefficient is 7 times that of air, and the heat release coefficient is 1415 times that of air at the same temperature and flow rate. Because of the small density, the ventilation loss and the wind friction consumption of the hydrogen cooling are 1/10 of that of the air under the same air pressure, and the ventilation noise can be reduced. The efficiency of the hydrogen cooling motor is improved, and the temperature rise is obviously reduced. Since the hydrogen in the motor must maintain a prescribed purity, a set of hydrogen supply devices must be provided for this purpose, which makes design and installation difficult. In addition, the problem of sealing explosion prevention is always a hidden trouble of safe operation of the hydrogen cooling motor.

The Yangjiang nuclear power turbogenerator is cooled by hydrogen, the purity requirement is generally controlled to be more than 97%, two hydrogen production systems are arranged in a BOP factory building (auxiliary factory building of a nuclear power plant), four hydrogen storage tanks which are mainly used for storing hydrogen with qualified quality are arranged, and hydrogen is distributed to nuclear islands and conventional island hydrogen users through hydrogen decompression when the nuclear power turbogenerator is required to be used. The four hydrogen storage tanks equipped in Yangjiang nuclear power at present need to be subjected to in-service inspection projects every four years, the projects are taken as an example for introduction, the storage tank inspection needs to be performed inside, and after the hydrogen system is stopped according to the requirements of GB4962-2008 hydrogen use safety technical regulations, a blind plate or other effective isolation measures are used for isolating the connection with operating equipment, and inert gas (the oxygen volume fraction of which is not more than 3%) meeting the safety requirements is used for replacement purging. The hydrogen system is overhauled by igniting, and the highest content of hydrogen volume fraction in the system and the ignition area is not more than 0.4%. The design of the present tank is shown in fig. 1.

The hydrogen replacement relates to hydrogen emission operation, has a relatively safe environment when discharging, and the safety protection is carried out to the flame arrester or water seal arrangement not designed to hydrogen storage tank bottom drain, and with the violent friction of pipe wall when hydrogen discharges, if there is the foreign matter in the pipe wall, probably lead to the hydrogen to appear burning the condition, causes the tempering to appear potential safety hazard such as explosion then, mainly has following two points:

1. potential safety hazard during pollution discharge of hydrogen storage tank

When the hydrogen storage tank performs sewage disposal work, the 603/604VK is required to be started, the sewage disposal outlet is not provided with a fire retardant device, the sewage disposal outlet belongs to direct air discharge of hydrogen, when the sewage disposal outlet rubs with the outer pipe wall and impurities are in the pipe wall, sparks are easy to generate so that the hydrogen is burnt, and tempering is easier to generate potential safety hazards of hydrogen explosion.

2. Safety risks exist when replacing and discharging hydrogen in hydrogen storage tank

The hydrogen storage tank needs to carry out two steps when recovering after finishing overhauling: (1) the method comprises the steps of (1) replacing oxygen with nitrogen, (2) replacing nitrogen with hydrogen, and according to the requirements of GB4962-2008 safety technical regulations for hydrogen use, analyzing the content of oxygen or hydrogen in a hydrogen system at least twice continuously, wherein the content of oxygen in the hydrogen system is equal to or less than 0.5% by volume, and in the first step, the relative atomic mass difference between the nitrogen and air is almost the same (nitrogen 28 and air 29), so that a mixed boosting replacement method is generally used in replacement, and according to the requirements of FIG. 1, 610VZ and 607VY are opened for filling nitrogen, 603/604VK or 664/665VY are opened for discharging gas, and the replacement effect is not affected. However, in the second step, because the relative atomic mass difference between the nitrogen and the hydrogen is large (nitrogen 28, hydrogen 1), the discharge of the gas after the gas is replaced by the discharge port at the upper part of the storage tank cannot achieve the ideal replacement effect, and a large amount of hydrogen is wasted, so that the hydrogen is required to be discharged by the bottom sewage outlet, and safety risks may be generated when the bottom hydrogen sewage outlet is used for discharging.

Disclosure of Invention

The utility model aims to solve the technical problem of providing a safety hydrogen discharging device for replacing hydrogen equipment.

The technical scheme adopted for solving the technical problems is as follows: the safe hydrogen discharging device for replacing the hydrogen equipment comprises a container, wherein a water inlet component, an air inlet component and an air outlet are arranged on the container;

the water inlet assembly comprises a water inlet interface and a control valve, the water inlet interface is arranged on the container and communicated with the inner cavity of the container, and the control valve is connected with the water inlet interface;

the air inlet assembly comprises an air inlet interface and an air inlet pipeline, the air inlet interface is arranged on the container and is communicated with the inner cavity of the container, the air inlet pipeline is arranged in the container and is connected with the air inlet interface, and the lower end of the air inlet pipeline extends to the inner bottom of the container.

In some embodiments, the water inlet assembly further comprises a water injection funnel removably connected to the water inlet interface.

In some embodiments, the water inlet assembly further comprises a water inlet tube detachably connected to the water inlet interface.

In some embodiments, the lower end of the air inlet line is provided with a plurality of air holes.

In some embodiments, a level tube is also provided on the container for detecting the amount of liquid medium within the interior cavity of the container.

In some embodiments, the underside of the container is provided with a drain assembly comprising a drain interface and a regulator valve disposed on the drain interface.

In some embodiments, the air outlet is provided with a filter screen.

In some embodiments, a pull tab ring is also provided on the container.

In some embodiments, the container is a stainless steel can.

In some embodiments, the container is a columnar structure.

The implementation of the utility model has the following beneficial effects: the safe hydrogen discharging device for replacing the hydrogen equipment can be applied to the hydrogen equipment of the power plant, can ensure that the replacement and maintenance of the hydrogen equipment without the flame arrester function obtain the precondition of safety, further ensures the safe operation of the hydrogen equipment of the power plant, and simultaneously plays a powerful support for the safety guarantee of equipment operators.

Drawings

In order to more clearly illustrate the technical solution of the present utility model, the following description will be given with reference to the accompanying drawings and examples, it being understood that the following drawings only illustrate some examples of the present utility model and should not be construed as limiting the scope, and that other related drawings can be obtained from these drawings by those skilled in the art without the inventive effort. In the accompanying drawings:

FIG. 1 is a schematic structural diagram of a nuclear power hydrogen storage tank design schematic;

FIG. 2 is a schematic diagram of a safety hydrogen discharge apparatus for hydrogen plant replacement according to some embodiments of the present utility model;

FIG. 3 is a side view of a hydrogen plant replacement safety hydrogen discharge apparatus in accordance with some embodiments of the present utility model;

fig. 4 is a top view of a safety hydrogen discharge apparatus for hydrogen plant replacement in some embodiments of the utility model.

Detailed Description

For a clearer understanding of technical features, objects and effects of the present utility model, a detailed description of embodiments of the present utility model will be made with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "rear", "upper", "lower", "left", "right", "longitudinal", "transverse", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", "tail", etc. are configured and operated in specific directions based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present utility model, and do not indicate that the apparatus or element to be referred to must have specific directions, and thus should not be construed as limiting the present utility model.

It should also be noted that unless explicitly stated or limited otherwise, terms such as "mounted," "connected," "secured," "disposed," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. When an element is referred to as being "on" or "under" another element, it can be "directly" or "indirectly" on the other element or one or more intervening elements may also be present. The terms "first," "second," "third," and the like are used merely for convenience in describing the present utility model and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, whereby features defining "first," "second," "third," etc. may explicitly or implicitly include one or more such features. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

In the following description, for purposes of explanation and not limitation, specific details are set forth such as the particular system architecture, techniques, etc., in order to provide a thorough understanding of the embodiments of the present utility model. It will be apparent, however, to one skilled in the art that the present utility model may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present utility model with unnecessary detail.

Referring to fig. 2 to 4, the present utility model shows a safety hydrogen discharging device for replacement of a hydrogen device, which is used for replacement safety hydrogen discharging when a hydrogen storage tank and a pipeline with no fire-fighting design are overhauled.

Further, the safety hydrogen discharging device for replacing the hydrogen equipment comprises a container 1, wherein a water inlet component 2, an air inlet component 3 and an air outlet 4 are arranged on the container 1;

the water inlet assembly 2 comprises a water inlet port 21 and a control valve 22, wherein the water inlet port 21 is arranged on the container 1 and is communicated with the inner cavity of the container 1, and the control valve 22 is connected with the water inlet port 21. The water inlet component 2 is used for being connected with an external liquid medium source so as to provide liquid medium to the inner cavity of the container 1, wherein the liquid medium can be purified water; preferably, the water inlet port 21 is provided at the upper end of the container 1.

The air intake assembly 3 comprises an air intake port 31 and an air intake line 32, the air intake port 31 is arranged on the container 1 and is communicated with the inner cavity of the container 1, the air intake line 32 is arranged in the container 1 and is connected with the air intake port 31, and the lower end of the air intake line 32 extends to the inner bottom of the container 1, such as a liquid medium. Preferably, the inlet port 31 is provided on the upper end of the container 1 for connection with a hydrogen system or hydrogen plant. Preferably, a valve is also provided on the air inlet port 31.

In some embodiments, the container 1 is of generally cylindrical configuration, such as may be a cylindrical configuration, which may be a stainless steel tank. The whole container 1 is of stainless steel design, and has strong pressure resistance and corrosion resistance. Of course, the container 1 may be made of other materials, which are not particularly limited herein.

In some embodiments, the water inlet assembly 2 further comprises a water injection funnel 23 detachably connected to the water inlet interface 21. The water injection funnel 23 is inserted on the water inlet interface 21, so that quick water injection can be realized.

In some embodiments, the water inlet assembly 2 further comprises a water inlet pipe detachably connected to the water inlet interface 21. The water inlet port 21 may be provided with a threaded port, the water inlet pipe may be a threaded pipe, the two pipes are in threaded connection, and one end of the water inlet pipe, which is far away from the water inlet port 21, may be connected with an external water source so as to inject liquid medium into the container 1. Preferably, the water inlet interface 21 may be a quick interface for quick connection to an external pipeline.

In some embodiments, the lower end of the air inlet line 32 is provided with a number of air holes. Preferably, the intake line 32 may be a coil pipe connected to a lower end of the straight pipe, and an upper end of the straight pipe is connected to the intake port 31. The coil pipe is provided with a plurality of air holes, so that the air can be uniformly distributed and discharged into a liquid medium, and the internal stress of the device is ensured to be uniform. Preferably, the inlet port 31 may be of a standard port design, and may be connected to a quick connector or a metal hose assembly for introducing hydrogen.

In some embodiments, the air outlet 4 is disposed at the upper end of the container 1, the air outlet 4 may be in a cylindrical structure, and the air outlet 4 may be provided with a filter screen. Because the relative atomic mass of the hydrogen is the smallest of the chemical elements and lighter than the air, the air outlet 4 is arranged at the left side of the top of the container 1, and a filter screen is designed to prevent dust or foreign matters from entering the container 1. Preferably, the filter screen is a metal filter screen.

In some embodiments, the container 1 is further provided with a liquid level tube 5, and the liquid level tube 5 is used for detecting the amount of the liquid medium in the inner cavity of the container 1. Preferably, the liquid level pipe 5 is a visual transparent liquid level pipe, which is clear for the water level inside the container 1, and is convenient for identifying the height of the water level inside the container 1 and timely supplementing the water level inside the container 1.

In some embodiments, the underside of the container 1 is provided with a drain assembly 6, the drain assembly 6 comprising a drain interface 61 and a regulator valve 62 provided on the drain interface 61. When the safety hydrogen discharging device for replacing the hydrogen equipment is not used or cleaned, the safety hydrogen discharging device is used for discharging the internal liquid of the container 1, so that the weight of the device is conveniently reduced when the device is moved, and the situations of sprain, pull-up and the like of personnel are more humanized and protected. Preferably, the regulator valve 62 may be a gate valve.

In some embodiments, the container 1 is further provided with a pull tab ring 7. Preferably, the lifting handle ring 7 is a movable handle, so that the device can be conveniently moved and can be turned back to a side lying mode, and the lifting handle ring is convenient to use and does not occupy storage space.

The safe hydrogen discharging device for hydrogen equipment replacement has the following beneficial effects:

the method has the advantages that through optimizing and improving the gas replacement and the fire-free device during hydrogen discharge during overhauling of various hydrogen systems, the potential safety hazard during hydrogen discharge of the hydrogen systems is solved, and the guarantee is provided for stable operation of equipment and personnel safety;

the safety management requirement of the nuclear power hydrogen-related system is used as a guide, and a technical thought is provided for the safety operation and improvement promotion of the follow-up power plant hydrogen-related system, so that the safety operation and maintenance expansion of the hydrogen equipment are promoted.

The safety hidden danger that the fire-retarding function is not designed in the prior hydrogen system emission is fundamentally solved, and the safety of personnel is ensured and the safety and reliability of the system can be improved.

Understandably, through the use of the power plant hydrogen-related equipment, the replacement and maintenance of the hydrogen-containing equipment without the flame arrester function can obtain the precondition of safety, thereby further guaranteeing the safe operation of the power plant hydrogen-related equipment and simultaneously playing a powerful support for the safety guarantee of equipment operators. And further provides a guarantee for the safety development of nuclear power.

It is to be understood that the above examples only represent preferred embodiments of the present utility model, which are described in more detail and are not to be construed as limiting the scope of the utility model; it should be noted that, for a person skilled in the art, the above technical features can be freely combined, and several variations and modifications can be made without departing from the scope of the utility model; therefore, all changes and modifications that come within the meaning and range of equivalency of the claims are to be embraced within their scope.

Claims (10)

1. The safe hydrogen discharging device for replacing the hydrogen equipment is characterized by comprising a container (1), wherein the container (1) is provided with a water inlet component (2), an air inlet component (3) and an air outlet (4);

the water inlet assembly (2) comprises a water inlet interface (21) and a control valve (22), the water inlet interface (21) is arranged on the container (1) and is communicated with the inner cavity of the container (1), and the control valve (22) is connected with the water inlet interface (21);

the air inlet assembly (3) comprises an air inlet interface (31) and an air inlet pipeline (32), the air inlet interface (31) is arranged on the container (1) and is communicated with the inner cavity of the container (1), the air inlet pipeline (32) is arranged in the container (1) and is connected with the air inlet interface (31), and the lower end of the air inlet pipeline (32) extends to the inner bottom of the container (1).

2. The safety hydrogen discharge apparatus for hydrogen equipment replacement according to claim 1, wherein the water inlet assembly (2) further comprises a water injection funnel (23) detachably connected to the water inlet port (21).

3. The safety hydrogen discharge apparatus for hydrogen equipment replacement according to claim 1, wherein the water inlet assembly (2) further comprises a water inlet pipe detachably connected to the water inlet port (21).

4. The safety hydrogen discharge apparatus for hydrogen equipment replacement according to claim 1, wherein the lower end of the intake line (32) is provided with a plurality of air holes.

5. The safety hydrogen discharge apparatus for hydrogen equipment replacement according to claim 1, wherein a liquid level pipe (5) is further provided on the container (1), and the liquid level pipe (5) is used for detecting the amount of the liquid medium in the inner cavity of the container (1).

6. The safety hydrogen discharge device for hydrogen equipment replacement according to claim 1, characterized in that a discharge assembly (6) is provided at the lower side of the container (1), the discharge assembly (6) including a discharge port (61) and a regulating valve (62) provided on the discharge port (61).

7. The safety hydrogen discharge apparatus for hydrogen equipment replacement according to any one of claims 1 to 6, wherein the gas outlet (4) is provided with a filter screen.

8. The safety hydrogen discharge apparatus for hydrogen equipment replacement according to any one of claims 1 to 6, wherein a pull tab ring (7) is further provided on the container (1).

9. The safety hydrogen discharge apparatus for hydrogen equipment replacement according to any one of claims 1 to 6, wherein the container (1) is a stainless steel tank.

10. The safety hydrogen discharge apparatus for hydrogen equipment replacement according to any one of claims 1 to 6, wherein the container (1) has a columnar structure.

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