Hydrogen discharging system of electrolysis room

Abstract

The utility model relates to the field of seawater electrolysis of a nuclear power plant, in particular to a hydrogen discharging system of an electrolysis room, which is characterized in that a plurality of air extracting devices are arranged in a plurality of mounting holes of a top plate of the electrolysis room at intervals along a second horizontal direction according to the characteristic of small hydrogen density, and the air extracting devices are in one-to-one correspondence with the mounting holes; a plurality of ventilation openings are formed in the bottoms of the side plates of the electrolysis chamber at intervals, and the air extractor of the top plate of the electrolysis chamber and the ventilation openings in the bottoms of the side plates of the electrolysis chamber form forced convection, so that hydrogen escaping from the sodium hypochlorite storage tank is discharged out of the electrolysis chamber from the air extractor, and the influence of natural factors on the hydrogen discharging effect is avoided; and the situation that the concentration of hydrogen in the electrolysis chamber is high due to the fact that escaped hydrogen is sucked in the hydrogen discharging process is avoided. The air extractor is covered with the rain cover, rainwater is prevented from entering the electrolysis room from the air extractor at the top to corrode instruments in the electrolysis room, and the rain cover is prevented from hindering normal hydrogen discharge of the air extractor by forming the air outlet holes in the rain cover.

Description

Technical Field

[0001] The utility model relates to the field of seawater electrolysis in nuclear power plants, in particular to a hydrogen discharge system between electrolysis chambers. Background Art

[0002] The function of the seawater electrolysis chlorine production system in a nuclear power plant is to electrolyze seawater to produce sodium hypochlorite, and add it to the circulating water of the nuclear power plant to prevent marine organisms from breeding and blocking the circulating water system. Since a large amount of hydrogen is produced in the process of electrolyzing seawater, hydrogen is a flammable and explosive gas with strong permeability. The hydrogen produced in the electrolysis of seawater in the electrolytic cell will escape from the sodium hypochlorite storage tank, causing hydrogen accumulation between electrolysis, creating safety hazards.

[0003] One of the commonly used hydrogen discharge methods in the prior art is to use the natural circulation of air formed by the vents in the electrolysis room to discharge hydrogen. However, natural ventilation is affected by weather and wind. Depending on the changes in air circulation, the hydrogen discharge effect is unstable and local accumulation is likely to occur in the electrolysis room.

[0004] The second commonly used hydrogen discharge method in the prior art is to set an axial flow hydrogen discharge fan on the side wall of the electrolysis room. Since the electrolysis room often has a vent on the roof and the hydrogen discharge fan is set on the side wall of the electrolysis room, hydrogen escaping from the sodium hypochlorite storage tank will be sucked into the vent at the top of the electrolysis room during hydrogen discharge, resulting in a high hydrogen concentration in the room. In addition, since the vent is set on the roof of the electrolysis room and the hydrogen discharge fan is set on the side wall of the electrolysis room, affected by the weather, rainwater can enter the electrolysis room through the vent and the hydrogen discharge fan, causing corrosion to the instruments in the electrolysis room. Utility Model Content

[0005] One purpose of the utility model is to provide an electrolysis room hydrogen discharge system, which can discharge the hydrogen leaked in the electrolysis room in time and avoid the accumulation of hydrogen in the electrolysis room.

[0006] To achieve this purpose, the utility model adopts the following technical solutions:

[0007] A hydrogen discharge system between electrolysis chambers, comprising:

[0008] An electrolysis room, the electrolysis room comprising a bottom plate and a top plate arranged opposite to each other in a vertical direction, and two side plates arranged at intervals in a first horizontal direction and two side plates arranged at intervals in a second horizontal direction, the first horizontal direction is perpendicular to the second horizontal direction, a plurality of the side plates are connected end to end, and the upper and lower ends of the side plates are respectively connected to the top plate and the bottom plate to enclose an electrolysis chamber, and a plurality of ventilation holes arranged at intervals are opened at the bottom of the side plates;

[0009] A gas extraction device, wherein a mounting hole is provided on the top plate, the gas extraction device is installed in the mounting hole, a plurality of the mounting holes are arranged at intervals along the second horizontal direction, a plurality of the gas extraction devices are provided, and the plurality of the gas extraction devices are arranged in the plurality of the mounting holes in a one-to-one correspondence, and an air inlet of the gas extraction device is connected to the electrolysis chamber;

[0010] A rainproof device, the rainproof device includes a rain shield, the rain shield is arranged on the outer side of the top plate, the rain shield is arranged outside the air exhaust device, the rain shield is provided with an air outlet, and the inner cavity of the rain shield is connected to the outside atmosphere through the air outlet.

[0011] Furthermore, the air extraction device includes an axial flow fan, and the axial flow fan is embedded in the mounting hole.

[0012] Furthermore, the air extraction device is equidistant from the two side panels along the first horizontal direction.

[0013] Furthermore, the rain shield includes a rain shield plate and a plurality of support rods, the rain shield plate is connected to the upper surface of the top plate through the support rods, and the gap between two adjacent support rods forms the air outlet.

[0014] Furthermore, the ventilation opening is provided with a hollow dust-blocking structure.

[0015] Furthermore, it also includes a hydrogen detector, which is used to detect the hydrogen concentration in the electrolysis room;

[0016] The rotation speed of the axial flow fan is adjustable.

[0017] Furthermore, the rain protection device also includes:

[0018] A rain receiving portion is used to collect rainwater falling into the electrolysis room.

[0019] Furthermore, the rain receiving parts are provided in plurality, and the plurality of rain receiving parts correspond one-to-one to the plurality of air pumping devices. The rain receiving parts are located directly below the corresponding air pumping devices, and the rain receiving parts are connected to the inner side surface of the top plate through a plurality of circumferentially spaced connecting rods.

[0020] Furthermore, the rain receiving part has a rain receiving cavity with an open top, and the rain receiving part is connected to a drainage pipe, one end of the drainage pipe is connected to the rain receiving cavity, and the other end of the drainage pipe extends out of the electrolysis room.

[0021] Furthermore, the electrolysis room is provided with a plurality of beams spaced apart along the second horizontal direction, the beams extend along the first horizontal direction, and at least one exhaust device is provided in the interval between every two adjacent beams.

[0022] Beneficial effects:

[0023] According to the characteristic of low density of hydrogen, a plurality of exhaust devices are arranged in a plurality of mounting holes of the top plate of the electrolysis room at intervals along the second horizontal direction, the plurality of exhaust devices correspond to the plurality of mounting holes one by one, and a plurality of vents arranged at intervals are opened at the bottom of the side plate of the electrolysis room. The exhaust devices of the top plate of the electrolysis room and the vents at the bottom of the side plate of the electrolysis room form forced convection, so that the hydrogen escaping from the sodium hypochlorite storage tank is discharged from the exhaust devices to the outside of the electrolysis room.

[0024] Compared with only using the vents in the electrolysis room to discharge hydrogen, the utility model avoids the influence of natural factors such as weather and wind on the hydrogen discharge effect by providing an exhaust device, avoids local hydrogen accumulation in the electrolysis chamber, and stabilizes the hydrogen discharge effect.

[0025] Compared with the case where a plurality of vents are provided at intervals at the bottom of the side plate of the electrolysis room, the utility model avoids the exhaust device sucking hydrogen escaping from the sodium hypochlorite storage tank through the vent at the top of the electrolysis room during hydrogen discharge, resulting in poor hydrogen discharge effect and high hydrogen concentration in the room. By providing a rainproof device and using a rain shield to cover the outside of the exhaust device, rainwater is prevented from entering the electrolysis chamber from the top of the exhaust device and corroding the instruments in the electrolysis chamber. In addition, by providing an air outlet on the rain shield, the inner cavity of the rain shield is connected to the outside atmosphere through the air outlet, thereby preventing the rain shield from hindering the normal discharge of hydrogen by the exhaust device. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a structural schematic diagram of the hydrogen discharge system between electrolysis rooms provided by the utility model;

[0027] Figure 2 It is a front view of the hydrogen discharge system of the electrolysis room provided by the utility model.

[0028] in:

[0029] 1. Electrolysis room; 11. Bottom plate; 12. Top plate; 121. Mounting hole; 13. Side plate; 131. Ventilation hole; 14. Crossbeam; 2. Exhaust device; 21. Axial flow fan; 3. Rain protection device; 31. Rain shield; 311. Rain shield; 312. Support rod; 313. Air outlet; 32. Rain receiving part; 33. Connecting rod; 34. Drainage pipe; 4. Hydrogen detector. DETAILED DESCRIPTION

[0030] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and should not be construed as limiting the present invention.

[0031] In the description of the present invention, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance. Among them, the terms "first position" and "second position" are two different positions.

[0032] Unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0033] Unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include the first feature being in direct contact with the second feature, or may include the first feature being in contact with the second feature through another feature between them instead of being in direct contact. Moreover, a first feature being "above", "above" and "above" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes the first feature being directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0034] Currently, a commonly used method for discharging hydrogen is to use the natural circulation of air formed by the vents in the electrolysis room to discharge hydrogen. However, natural ventilation is affected by weather and wind. Depending on the changes in air circulation, the hydrogen discharge effect is unstable and local accumulation is likely to occur in the electrolysis room.

[0035] Another commonly used method of hydrogen discharge is to install an axial flow hydrogen discharge fan on the side wall of the electrolysis room. Since the electrolysis room often has a vent on the roof and the hydrogen discharge fan is installed on the side wall of the electrolysis room, hydrogen escaping from the sodium hypochlorite storage tank will be sucked into the vent at the top of the electrolysis room during hydrogen discharge, resulting in a high hydrogen concentration in the room. In addition, since the vent is installed on the roof of the electrolysis room and the hydrogen discharge fan is installed on the side wall of the electrolysis room, affected by the weather, rainwater can enter the electrolysis room through the vent and the hydrogen discharge fan, causing corrosion to the instruments in the electrolysis room.

[0036] Based on the above problems, this embodiment provides an electrolysis room hydrogen discharge system, which can be used to discharge hydrogen leaked in the electrolysis room, avoid hydrogen accumulation in the electrolysis room, and prevent rainwater from corroding instruments in the electrolysis room.

[0037] Please refer to Figure 1-2 The electrolysis room hydrogen discharge system provided in this embodiment includes an electrolysis room 1, an exhaust device 2 and a rainproof device 3. The electrolysis room 1 includes a bottom plate 11 and a top plate 12 arranged opposite to each other in the vertical direction, and two side plates 13 arranged at intervals in a first horizontal direction and two side plates 13 arranged at intervals in a second horizontal direction. The first horizontal direction is perpendicular to the second horizontal direction. The multiple side plates 13 are connected end to end, and the upper and lower ends of the side plates 13 are respectively connected to the top plate 12 and the bottom plate 11. The bottom plate 11, the top plate 12 and the multiple side plates 13 are surrounded by an electrolysis chamber. The bottom of the side plate 13 is provided with multiple intervals. A vent 131 is arranged, a mounting hole 121 is arranged on the top plate 12, the exhaust device 2 is installed in the mounting hole 121, a plurality of mounting holes 121 are arranged at intervals along the second horizontal direction, a plurality of exhaust devices 2 are provided, and a plurality of exhaust devices 2 are arranged in a one-to-one correspondence in a plurality of mounting holes 121, the air inlet of the exhaust device 2 is connected with the electrolysis chamber, the rainproof device 3 includes a rain shield 31, the rain shield 31 is arranged on the outer side of the top plate 12, the rain shield 31 is arranged outside the exhaust device 2, an air outlet hole 313 is arranged on the rain shield 31, and the inner cavity of the rain shield 31 is connected with the outside atmosphere through the air outlet hole 313.

[0038] According to the characteristic of low density of hydrogen, a plurality of exhaust devices 2 are arranged in a plurality of mounting holes 121 of the top plate 12 of the electrolysis room 1 at intervals along the second horizontal direction, and the plurality of exhaust devices 2 correspond to the plurality of mounting holes 121 one by one, and a plurality of vents 131 arranged at intervals are opened at the bottom of the side plate 13 of the electrolysis room 1. The exhaust devices 2 on the top plate 12 and the vents 131 at the bottom of the side plate 13 form forced convection, so that the hydrogen escaping from the sodium hypochlorite storage tank is discharged from the exhaust devices 2 to the outside of the electrolysis room 1.

[0039] The utility model avoids the influence of natural factors such as weather and wind on the hydrogen discharge effect by arranging the air extraction device 2, avoids the local hydrogen accumulation in the electrolysis room 1, and the hydrogen discharge effect is stable.

[0040] By providing a rainproof device 3 and using a rain shield 31 to cover the outside of the exhaust device 2, rainwater is prevented from entering the electrolysis chamber from the top of the exhaust device 2 and corroding the instruments in the electrolysis room 1. In addition, by providing an air outlet 313 on the rain shield 31, the inner cavity of the rain shield 31 is connected to the outside atmosphere through the air outlet 313, thereby preventing the rain shield 31 from hindering the normal discharge of hydrogen from the exhaust device 2.

[0041] For details, please refer to Figure 1The exhaust device 2 provided in this embodiment includes an axial flow fan 21, which is embedded in the mounting hole 121. The hydrogen in the electrolysis room 1 is discharged to the outside of the electrolysis room 1 through the axial flow fan 21. The axial flow fan 21 rotates to extract the hydrogen at the top of the electrolysis room 1 to the outside of the electrolysis room 1. The air is continuously introduced through the vent 131 to avoid the electrolysis room 1 being in a vacuum state, thereby reducing safety hazards.

[0042] For further information, please refer to Figure 1 In order to improve the hydrogen discharge effect, the distance from the exhaust device 2 to the two side plates 13 along the first horizontal direction is equal. By setting the exhaust device 2 at the center position in the first horizontal direction, the hydrogen at the connection between the two side plates 13 and the top plate 12 arranged opposite to each other along the first direction can also be discharged through the exhaust device 2, thereby avoiding the problem of local hydrogen accumulation or difficulty in discharging some hydrogen.

[0043] For further information, please refer to Figure 1 The rain shield 31 includes a rain shield 311 and a plurality of support rods 312. The rain shield 311 is connected to the upper surface of the top plate 12 through the support rods 312. The gap between two adjacent support rods 312 forms an air outlet 313. The rain shield 311 forms an air outlet 313 with a relatively large area through the support rods 312 and the outer side of the top plate 12, so that hydrogen can be discharged more easily and the hydrogen discharge efficiency is higher.

[0044] For further information, please refer to Figure 2 In order to prevent dust and other impurities from entering the electrolysis chamber through the vent 131 due to natural weather, the vent 131 is provided with a hollow dust blocking structure to prevent dust and other impurities from entering the electrolysis chamber through the vent 131. Specifically, the hollow dust blocking structure can be a blind, a silk screen window, etc.

[0045] For further information, please refer to Figure 2 In order to accurately control the axial flow fan 21 to achieve a good hydrogen discharge effect, the electrolysis room hydrogen discharge system provided in this embodiment also includes a hydrogen detector 4, which is used to detect the hydrogen concentration in the electrolysis room 1, and the speed of the axial flow fan 21 is adjustable. When the hydrogen detector 4 detects that the hydrogen concentration in the electrolysis room 1 is too high, the axial flow fan 21 increases its own speed to discharge the hydrogen. When the hydrogen detector 4 detects that the hydrogen concentration in the electrolysis room 1 is low, the axial flow fan 21 can slow down its speed, thereby saving energy consumption. Specifically, the processing terminal display of the hydrogen detector 4 can be set in the electrolysis room 1 at a position where the operator can read it, and the operator adjusts the speed of the axial flow fan 21 according to the display data.

[0046] For further information, please refer to Figure 2Since the rain shield 31 is provided with an air outlet 313 to avoid affecting the hydrogen discharge effect, the rain may enter the electrolysis chamber from the air outlet 313 of the rain shield 31 at an angle to the vertical direction under the influence of natural wind force on rainy days. In order to prevent the rain from polluting the instruments in the electrolysis chamber, the rain protection device 3 also includes a rain receiving portion 32, which is used to collect the rain falling into the electrolysis chamber. The rain entering the electrolysis chamber from the axial flow fan 21 at the top of the electrolysis room 1 falls into the rain receiving portion 32, thereby preventing the electrolysis instruments below the rain receiving portion 32 from being corroded by the rain.

[0047] For details, please refer to Figure 2 There are multiple rain receiving parts 32, and the multiple rain receiving parts 32 correspond to the multiple exhaust devices 2 one by one. The rain receiving parts 32 are located directly below the corresponding exhaust devices 2. The rain receiving parts 32 are connected to the inner side surface of the top plate 12 through multiple connecting rods 33 arranged at intervals in the circumferential direction, so as to prevent hydrogen from being blocked by the rain receiving parts 32 and unable to be discharged from the exhaust devices 2.

[0048] For further information, please refer to Figure 2 In order to timely discharge the rainwater received in the rain receiving part 32 and avoid the rainwater in the rain receiving part 32 overflowing and causing pollution of instruments in the electrolysis room 1, the rain receiving part 32 has a rain receiving cavity with an open top, and the rain receiving part 32 is connected to a drainage pipe 34, one end of the drainage pipe 34 is connected to the rain receiving cavity, and the other end of the drainage pipe 34 extends to the outside of the electrolysis room 1. The rainwater in the rain receiving part 32 can be discharged to the outside of the electrolysis room 1 in time along the drainage pipe 34.

[0049] For further information, please refer to Figure 2 At present, common electrolysis rooms 1 are all provided with cross beams 14 for support. The electrolysis room 1 provided in this embodiment is provided with a plurality of cross beams 14 spaced along the second horizontal direction. The cross beams 14 extend along the first horizontal direction. At least one exhaust device 2 is provided in the interval between every two adjacent cross beams 14. Since two adjacent cross beams 14 and two side plates 13 arranged opposite to each other in the first direction enclose a space with an opening at the lower end, it is difficult for hydrogen to flow after entering the space. By providing an exhaust device 2 in the interval between every two adjacent cross beams 14, it is possible to avoid the accumulation of hydrogen between the two cross beams 14 in the electrolysis room 1.

[0050] The above contents are only preferred embodiments of the present invention. For ordinary technicians in this field, according to the concept of the present invention, there will be changes in the specific implementation methods and application scopes. The contents of this specification should not be understood as limiting the present invention.

Claims

1. A hydrogen discharge system between electrolysis chambers, characterized in that: include: An electrolysis room (1), the electrolysis room (1) comprising a bottom plate (11) and a top plate (12) arranged opposite to each other in a vertical direction, and two side plates (13) arranged at intervals in a first horizontal direction and two side plates (13) arranged at intervals in a second horizontal direction, the first horizontal direction being perpendicular to the second horizontal direction, a plurality of the side plates (13) being connected end to end, and the upper and lower ends of the side plates (13) being respectively connected to the top plate (12) and the bottom plate (11) to enclose an electrolysis chamber, and a plurality of ventilation holes (131) arranged at intervals are provided at the bottom of the side plates (13); A gas extraction device (2), wherein a mounting hole (121) is provided on the top plate (12), the gas extraction device (2) is mounted on the mounting hole (121), a plurality of the mounting holes (121) are arranged at intervals along the second horizontal direction, a plurality of the gas extraction devices (2) are provided, and the plurality of the gas extraction devices (2) are arranged in a one-to-one correspondence in the plurality of the mounting holes (121), and an air inlet of the gas extraction device (2) is connected to the electrolysis chamber; A rainproof device (3), the rainproof device (3) comprising a rainproof cover (31), the rainproof cover (31) being arranged on the outer side surface of the top plate (12), the rainproof cover (31) being arranged outside the air extraction device (2), the rainproof cover (31) being provided with an air outlet hole (313), and the inner cavity of the rainproof cover (31) being connected to the outside atmosphere through the air outlet hole (313).

2. The electrolysis room hydrogen removal system according to claim 1, characterized in that: The air extraction device (2) comprises an axial flow fan (21), and the axial flow fan (21) is embedded in the mounting hole (121).

3. The hydrogen removal system between electrolysis chambers according to claim 1, characterized in that: The distance between the air extraction device (2) and the two side panels (13) along the first horizontal direction is equal.

4. The electrolysis room hydrogen removal system according to claim 1, characterized in that: The rain shield (31) comprises a rain shield (311) and a plurality of support rods (312); the rain shield (311) is connected to the upper surface of the top plate (12) via the support rods (312); and the gap between two adjacent support rods (312) forms the air outlet (313).

5. The electrolysis room hydrogen removal system according to claim 1, characterized in that: The ventilation opening (131) is provided with a hollow dust-blocking structure.

6. The electrolysis room hydrogen removal system according to claim 2, characterized in that: It also includes a hydrogen detector (4), which is used to detect the hydrogen concentration in the electrolysis room (1); The rotation speed of the axial flow fan (21) is adjustable.

7. The electrolysis room hydrogen removal system according to claim 1, characterized in that: The rain protection device (3) further comprises: A rain receiving portion (32), wherein the rain receiving portion (32) is used to collect rainwater falling into the electrolysis room (1).

8. The hydrogen removal system between electrolysis chambers according to claim 7, characterized in that: A plurality of rain receiving parts (32) are provided, and the plurality of rain receiving parts (32) correspond one-to-one to the plurality of air pumping devices (2). The rain receiving parts (32) are located directly below the corresponding air pumping devices (2), and the rain receiving parts (32) are connected to the inner side surface of the top plate (12) via a plurality of circumferentially spaced connecting rods (33).

9. The hydrogen removal system between electrolysis chambers according to claim 7, characterized in that: The rain receiving portion (32) has a rain receiving cavity with an open top. The rain receiving portion (32) is connected to a drainage pipe (34). One end of the drainage pipe (34) is in communication with the rain receiving cavity, and the other end of the drainage pipe (34) extends out of the electrolysis room (1).

10. The electrolysis room hydrogen removal system according to any one of claims 1 to 9, characterized in that: The electrolysis room (1) is provided with a plurality of cross beams (14) spaced apart along the second horizontal direction. The cross beams (14) extend along the first horizontal direction, and at least one exhaust device (2) is provided in the interval between every two adjacent cross beams (14).

Images