阅读说明：本技术 一种船用毛细力驱动的安全壳热量导出系统 (Marine capillary force driven containment heat exporting system ) 是由 徐广展 李辉 郭彪 刘佳 尤小健 雷斌 魏协宇 代涛 刘一萌 邹振海 于 2020-12-01 设计创作，主要内容包括：本发明涉及一种船用毛细力驱动的安全壳热量导出系统,该系统包括水箱,安全壳设于水箱中,所述安全壳的外表面设有对水具有毛细驱动力的多孔结构。本发明导热系统通过多孔结构对于液体的毛细力驱动流体在安全壳表面流动,从而带走安全壳内的热量,本发明不需要对能动设备持续供电,即使在失去电源的情况下,依然可以起到安全保护的作用。(The invention relates to a capillary force driven containment vessel heat leading-out system for a ship. The heat conduction system drives the fluid to flow on the surface of the safety shell through the capillary force of the porous structure to the liquid, so that the heat in the safety shell is taken away.)

1. The utility model provides a marine capillary force driven containment heat derivation system, includes the water tank, and in the water tank was located to the containment, its characterized in that: the outer surface of the containment is provided with a porous structure which has capillary driving force for water, and holes in the porous structure are mutually communicated.

2. The marine capillary force driven containment heat removal system of claim 1, wherein: the porous structure is formed by sintering microspherical copper particles.

3. The marine capillary-driven containment heat removal system of claim 2, wherein: the pore diameter of the porous structure is 10-500 mu m.

4. The marine capillary-driven containment heat removal system of claim 3, wherein: the porous structure surface is provided with ribs with porous structures.

5. The marine capillary-driven containment heat removal system of claim 4, wherein: an air guide cylinder is arranged on the periphery of the porous structure, an air flow channel is formed between the air guide cylinder and the porous structure, and an air outlet is formed in the top end of the guide cylinder.

6. The marine capillary-driven containment heat removal system of claim 5, wherein: the top of the air guide cylinder is obliquely upwards converged and connected to the air outlet.

7. The marine capillary driven containment heat removal system according to claim 5 or 6, wherein: the air outlet is of a porous plate-shaped structure.

8. The marine capillary-driven containment heat removal system of claim 7, wherein: the safety shell is made of steel, and the outer surface of the safety shell is coated with an anti-corrosion coating.

9. The marine capillary-driven containment heat removal system of claim 8, wherein: deionized water is filled in the water tank, a water replenishing pipeline is arranged at the upper part of the water tank, and a drainage pipeline is arranged at the lower part of the water tank.

10. The marine capillary-driven containment heat removal system of claim 9, wherein: and the water tank is provided with a liquid level sensor and a temperature sensor.

Technical Field

The invention relates to a heat device of a containment vessel in a nuclear power station, in particular to a capillary force driven containment vessel heat exporting system for a ship.

Background

When a loss of coolant accident happens to a primary loop of the nuclear power plant or a main steam pipeline in a containment vessel is broken, high-temperature and high-pressure coolant or steam enters the containment vessel to enable the temperature and the pressure in the containment vessel to be increased sharply, if measures of temperature reduction and pressure reduction are not taken, damage to equipment in the containment vessel and the sealing performance of the containment vessel can be threatened, even the containment vessel is broken, and therefore large-scale radioactive substances are released into the environment, and serious radioactive pollution is caused.

At present, the containment spraying system is mainly adopted to reduce the internal pressure and temperature of the containment under accident conditions in the mainstream second-generation nuclear power in China, the containment spraying system mainly comprises a spraying pump, a spraying pipe line, an external water tank and the like, and water in the external water tank is sprayed into the containment through the spraying pipe line through the spraying pump to condense steam in the containment, so that the purpose of reducing the internal temperature and pressure of the containment is achieved. However, the main problem is that alternating current needs to be supplied during the operation of the spray pump, which undoubtedly increases the risk of failure of the spray system due to power loss, and the direct application thereof to the marine nuclear power plant also brings a great deal of difficulty to the spatial arrangement and maintenance of the ship.

Disclosure of Invention

The invention aims to overcome the defects of the prior art, and provides a heat conduction system of a containment vessel driven by a marine capillary force, which is combined with the characteristics of small containment vessel of a marine nuclear power plant, wherein the heat conduction system drives fluid to flow on the surface of the containment vessel through the capillary force of a porous structure on the liquid so as to take away the heat in the containment vessel.

The technical scheme adopted for achieving the purpose of the invention is that the marine capillary force driven containment vessel heat exporting system comprises a water tank, wherein the containment vessel is arranged in the water tank, a porous structure with capillary driving force for water is arranged on the outer surface of the containment vessel, and holes in the porous structure are mutually communicated.

In the technical scheme, the porous structure is formed by sintering microspherical copper particles.

Further, the pore diameter of the porous structure is 10-500 μm.

Further, an air guide cylinder is arranged on the periphery of the porous structure, an air flow channel is formed between the air guide cylinder and the porous structure, and an air outlet is formed in the top end of the guide cylinder.

Furthermore, the top of the air guide cylinder is obliquely upwards converged and connected to the air outlet.

In the above technical solution, the air outlet is a porous plate-shaped structure.

In the technical scheme, the containment vessel is made of steel, and the outer surface of the containment vessel is coated with an anticorrosive coating.

In the technical scheme, deionized water is filled in the water tank, a water replenishing pipeline is arranged at the upper part of the water tank, and a water drainage pipeline is arranged at the lower part of the water tank.

In the technical scheme, the water tank is provided with a liquid level sensor and a temperature sensor.

Compared with the prior art, the invention has the following advantages:

1. the invention adopts the capillary force as the driving force of the liquid, can effectively reduce the influence of the inclination and the swing of the ship body on the driving force, and has stable liquid transmission.

2. The invention reduces the arrangement of large-scale equipment such as a heat exchanger, a pump and the like, can solve the problem by arranging a layer of thin porous layer on the basis of the existing containment structure, is beneficial to the space configuration of shipboard equipment, reduces the control of active equipment such as the pump, a valve and the like, effectively reduces the possibility of human errors and simplifies the design of a measurement and control system.

3. The invention does not need to continuously supply power to the active equipment, and can still play a role of safety protection even under the condition of losing the power supply.

4. The invention takes away heat through the evaporation of water, has higher heat carrying capacity and can save water.

Drawings

FIG. 1 is a schematic structural diagram of a marine capillary force driven containment heat removal system according to the present invention.

In the figure, 1-a water tank, 1.1-a water replenishing pipeline, 1.2-a water discharging pipeline, 2-a safety shell, 3-a porous structure, 3.1-a rib with a porous structure, 4-an air guide cylinder, 4.1-an air inlet and 4.2-a gas outlet.

Detailed Description

The invention is described in further detail below with reference to the figures and the specific embodiments.

As shown in FIG. 1, the capillary force driven containment heat exporting system for the ship comprises a water tank 1, a containment 2 is arranged in the water tank 1, the water tank 1 is arranged around the periphery of the bottom of the containment, and water in the tank 1 provides sufficient water source for shell cooling, wherein the water source can be deionized water.

The invention has the creation points that: the outer surface of the containment vessel 2 is provided with a porous structure 3 having capillary driving force for water, and the pores in the porous structure 3 are in a mutual communication state. The porous structure 3 is formed by sintering microspherical copper particles and covers the surface of the containment. The porous structure 3 positioned at the lower end of the containment vessel 2 is immersed in the water tank 1, and the tiny porous structure forms capillary driving force for water, so that the water is conveyed from the bottom end of the containment vessel to the top end of the containment vessel. Preferably, the pore diameter of the porous structure used in the present invention is 10 μm to 500 μm, and the pore diameter of the size can better realize the capillary driving force for water. When a loss of coolant accident occurs, the steam in the containment vessel 2 transfers heat to the water in the porous structure, and the water in the porous structure is heated and evaporated, so that the heat in the containment vessel 2 is taken away. When the water in the porous structure is evaporated, the porous structure utilizes the capillary force to timely convey and supplement the water in the water tank 1 to the porous structure. In order to improve the evaporation area of the porous structure, the heat exchange capacity is increased. The surface of the porous structure is provided with the fins 3.1 with the porous structure, so that heat exchange is enhanced.

In order to improve the evaporation rate of water in the porous structure 3 and enhance the heat exchange capacity, an air guide cylinder 4 can be arranged outside the porous structure 3, an air flow channel is formed between the porous structure 3 and the air guide cylinder 4, the bottom end of the air flow channel is an air inlet 4.1, and the top end of the air guide cylinder 4 is provided with an air outlet 4.2. In addition, in order to maintain the flow velocity of the air in the flow channel, the top of the air guide cylinder can be obliquely and upwards converged and connected to the air outlet 4.2, and the structure of the top of the air guide cylinder can be specifically designed to be in a tapered shape, as shown in fig. 1, so that the air flow velocity is favorably increased. As a preferred embodiment, the air outlet 4.2 at the top end of the air guide shell may be provided as a perforated plate-shaped structure, which prevents the entry of foreign substances into the air flow channel. The air guide cylinder is made of reinforced concrete, so that radioactive substances in the containment can be shielded, and the threat of external flying objects to the completeness of the containment structure can be effectively resisted.

The containment vessel 2 is a steel containment vessel, and the metal containment vessel has higher heat conductivity coefficient, so that the heat resistance of the inner side and the outer side of the containment vessel is reduced. When a loss of coolant accident happens, steam can be rapidly condensed. The anti-corrosion coatings are coated on the two sides of the containment vessel, so that the corrosion of the containment vessel can be prevented, the long-term stability of the structural performance of the containment vessel can be ensured, the increase of the contact thermal resistance caused by the corrosion can be avoided, and the stability of the heat carrying capacity of a heat conduction system of the containment vessel is facilitated.

The water tank 1 is also provided with a liquid level sensor and a temperature sensor, when the water level is reduced due to leakage of the water tank or natural evaporation of water, a water level alarm is triggered, water is supplemented into the water tank 1 through a water supplementing pipeline 1.1, and when the water level reaches a set value, water supplementing is stopped. When the time of the loss of coolant accident is long, water in the water tank is evaporated and consumed, and a water supply pipeline 1.1 can be used for supplying water, so that the long-term heat conduction of the containment is ensured. For the water tank maintenance or the needs of regularly changing water, be provided with drain line 1.2 in the water tank bottom, through the water exhaust in with water tank 1, can make things convenient for the maintenance of water tank.