Ventilation device for exhausting hydrogen from a plant room

Abstract

The utility model provides a kind of ventilation device for discharging hydrogen in factory building, it is related to factory building ventilation technical field, mainly for solving the problem of high cost of discharging hydrogen ventilation in prior art.The ventilation device of the utility model includes the streamline roof natural ventilator being set on the roof opening foundation of factory building, streamline roof natural ventilator has vertically arranged ventilation throat, multiple lower ventilation valve plates are arranged in the lower part of ventilation throat, multiple combined exhaust units are arranged in the upper part of ventilation throat, each combined exhaust unit is composed of one explosion-proof fan and multiple upper ventilation valve plates;Hydrogen concentration sensor is installed on the top of factory building, when hydrogen concentration sensor alarms, lower ventilation valve plate and explosion-proof fan open ventilation and discharge hydrogen, ensure the safety of factory building.The ventilation device of the utility model guarantees safety, and gives consideration to the economy and comfort of factory building ventilation.

Description

Technical Field

[0001] This utility model is specifically a ventilation device for discharging hydrogen gas from a factory building, and relates to the field of factory ventilation technology. Background Technology

[0002] Hydrogen can cause explosions. According to national regulations, ventilation needs to be strengthened when hydrogen is generated in a factory. The ventilation requirements are: (1) the exhaust vents should be located at the highest point of the factory; (2) for factories with an elevation of less than 6.0m, the air exchange rate should not be less than 12 times / h. However, this air exchange rate contradicts the current national factory ventilation and hygiene standards. If the ventilation volume required to meet the factory ventilation and hygiene standards is to be met, the ventilation volume converted into air exchange rate is much less than 12 times / h. This means that if the air exchange rate of 12 times / h is to be met, the ventilation fan needs to run for a long time, which greatly increases the ventilation cost of the factory. Especially for factories with cooling and heating measures, the large flow of ventilation drastically increases the cooling and heating costs of the factory. Therefore, it is necessary to balance the economy and comfort of factory ventilation while ensuring safety. Utility Model Content

[0003] In order to overcome the shortcomings of the prior art, this utility model discloses a ventilation device for discharging hydrogen in a factory building, the purpose of which is to balance the economy and comfort of factory ventilation while ensuring safety.

[0004] The present invention adopts the following technical solution: A ventilation device for discharging hydrogen from a factory building includes a streamlined roof natural ventilator installed on the foundation of an opening in the factory roof. The streamlined roof natural ventilator has a vertically arranged ventilation throat. Multiple lower ventilation valves are arranged below the ventilation throat, and multiple combined exhaust units are arranged above the ventilation throat. Each combined exhaust unit consists of an explosion-proof fan and multiple upper ventilation valves. A hydrogen concentration sensor is installed on the top of the factory building. When the hydrogen concentration sensor alarms, the lower ventilation valves and the explosion-proof fan open to ventilate and discharge hydrogen.

[0005] Further improve the technical solution: the upper ventilation valve plate and the lower ventilation valve plate are driven to open and close by an electric mechanism.

[0006] Further improve the technical solution: Each combined exhaust unit consists of an explosion-proof fan and six upper ventilation valve plates.

[0007] Further improve the technical solution: install an inspection door at the ventilation vent.

[0008] Further improvements to the technical solution: A first hydrogen concentration sensor is installed on the top of the plant, and a second hydrogen concentration sensor is installed inside the ventilation vent.

[0009] Further improvements to the technical solution: The ventilation device also includes a grouping control circuit, which is connected to the first hydrogen concentration sensor and the second hydrogen concentration sensor, and is used to control the opening and closing of the upper ventilation valve plate, the lower ventilation valve plate and the explosion-proof fan.

[0010] After implementing the above technical solution, the beneficial effects of this utility model compared to the prior art are: The ventilation device of this invention includes a group control circuit, an upper ventilation valve plate, a lower ventilation valve plate, and an explosion-proof fan. Normally, the group control circuit controls the opening and closing of the upper and lower ventilation valve plates to meet the ventilation requirements of the plant while also ensuring comfortable temperature control within the plant. When hydrogen is generated in the plant, the group control circuit closes the upper ventilation valve plate and simultaneously opens the lower ventilation valve plate and the explosion-proof fan for forced hydrogen exhaust ventilation, ensuring the safety of the plant.

[0011] The ventilation device of this invention balances safety with the economy and comfort of factory ventilation. Attached Figure Description

[0012] Appendix Figure 1 The diagram shown is a schematic diagram of the structure of this hydrogen exhaust ventilation device.

[0013] Appendix Figure 2 The diagram shown is a structural schematic of the combined exhaust unit.

[0014] Appendix Figure 3 The diagram shown illustrates the natural ventilation of this device during spring and autumn.

[0015] Appendix Figure 4 The diagram shows the ventilation of this device during summer and winter.

[0016] Appendix Figure 5 The diagram shown illustrates the hydrogen discharge process of this device.

[0017] In the attached diagram: 1. Foundation of the opening in the factory roof; 2. Streamlined roof natural ventilator; 3. Lower ventilation valve plate; 5. Combined exhaust unit; 5.1. Explosion-proof fan; 5.2. Upper ventilation valve plate; 6. First hydrogen concentration sensor; 7. Second hydrogen concentration sensor. Detailed Implementation

[0018] The preferred embodiments of this utility model are described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of this utility model and are not intended to limit the scope of protection of this utility model. It should be noted that in the description of this utility model, terms such as "front," "rear," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. This is merely for ease of description and does not indicate or imply that the device or element must have a specific orientation and positional relationship, and therefore should not be construed as a limitation of this utility model. It should also be noted that in the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a mechanical connection or an electrical connection; it can refer to a direct connection or an indirect connection through an intermediate medium, or a connection within two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0019] A ventilation device for discharging hydrogen from a factory building is disclosed, relating to the field of factory ventilation technology, primarily addressing the problem of high costs associated with hydrogen discharge ventilation in existing technologies. The composition and usage of this invention are described in detail below.

[0020] See attached document Figure 1 and attached Figure 2 The ventilation device of this utility model includes a group control circuit and a streamlined roof natural ventilator 2 installed on the foundation 1 of the opening in the factory roof. The streamlined roof natural ventilator 2 has a vertically arranged ventilation throat. The streamlined roof natural ventilator 2 is existing technology, and it can achieve natural ventilation by utilizing the thermal pressure of indoor and outdoor air. The advantages of the streamlined roof natural ventilator 2 are large ventilation volume, virtually no power consumption, and low risk of roof leakage; the disadvantages are that it is easily affected by changes in the indoor and outdoor environment, resulting in unstable ventilation performance.

[0021] To balance safety with economic efficiency and comfort in factory ventilation, multiple lower ventilation valves 3 are arranged at the lower part of the ventilation throat, and multiple combined exhaust units 5 are arranged at the upper part of the ventilation throat. In this embodiment, each combined exhaust unit 5 consists of an explosion-proof fan 5.1 and six upper ventilation valves 5.2, which are driven to open and close by an electric mechanism. For easy maintenance of the upper ventilation valves 5.2, lower ventilation valves 3, and explosion-proof fan 5.1, an inspection door (not shown in the figure) is provided at the ventilation throat.

[0022] Unlike conventional fans, explosion-proof fans use specialized motors that meet international explosion-proof standards, preventing internal arc leakage. Furthermore, all parts of the explosion-proof fan that could potentially leak sparks or heat are highly sealed to ensure that external hazardous materials cannot enter the fan. For safety, emergency switches for the upper ventilation valve plate 5.2, lower ventilation valve plate 3, and explosion-proof fan 5.1 are located on both the inside and outside of the factory's escape door, allowing for emergency opening of these switches during personnel escape. Additionally, all three components—upper ventilation valve plate 5.2, lower ventilation valve plate 3, and explosion-proof fan 5.1—are equipped with anti-static grounding measures, and the insulating gaskets are connected via jumpers.

[0023] A first hydrogen concentration sensor 6 is installed on the roof of the plant, and a second hydrogen concentration sensor 7 is installed inside the ventilation vent. A group control circuit is connected to the first hydrogen concentration sensor 6 and the second hydrogen concentration sensor 7 to control the opening and closing of the upper ventilation valve plate 5.2, the lower ventilation valve plate 3, and the explosion-proof fan 5.1. The purpose of using two hydrogen concentration sensors is to increase system redundancy; if one hydrogen concentration sensor malfunctions, the other can still function normally.

[0024] See attached document Figure 1 and attached Figure 3 During spring and autumn, the factory does not require the use of refrigeration or heating equipment; natural ventilation is achieved solely through the opening and closing of the upper ventilation valve 5.2 and the lower ventilation valve 3. At this time, the natural ventilation volume of the factory can be controlled by adjusting the number and degree of opening and closing of each upper ventilation valve 5.2 and lower ventilation valve 3 via a group control circuit, ensuring the factory's ventilation requirements are met.

[0025] See attached document Figure 4 During summer and winter, when cooling or heating equipment needs to be turned on in the factory, the upper ventilation valve 5.2 is completely closed, and the opening degree of the lower ventilation valve 3 is reduced as needed (at this time, the air in the factory flows out through the gap of the lower ventilation valve 3 from the gap in the explosion-proof fan 5.1, with a small flow rate). By reducing the ventilation volume, the temperature in the factory is maintained, creating a comfortable working environment for the workers. Due to the small ventilation volume, the wear and tear on the cooling or heating equipment is reduced, thus lowering the operating costs of the cooling and heating equipment.

[0026] See attached document Figure 5 When hydrogen is generated inside the plant, it will accumulate at the top. When the hydrogen concentration is about to exceed the safe level, the first hydrogen concentration sensor 6 and the second hydrogen concentration sensor 7 will trigger an alarm. At this time, the group control circuit will close the upper ventilation valve 5.2 to prevent short circuits in the airflow when the explosion-proof fan 5.1 is ventilating. Simultaneously, the lower ventilation valve 3 and the explosion-proof fan 5.1 will be opened for forced ventilation to remove hydrogen until the hydrogen is discharged from the plant. Then, the alarms from the first hydrogen concentration sensor 6 and the second hydrogen concentration sensor 7 will be deactivated.

[0027] As can be seen from the above, because this utility model is equipped with a hydrogen concentration sensor and forced ventilation measures, it can prevent hydrogen explosions without having to meet the standard requirement of at least 12 air changes per hour, thus ensuring the safety of the factory and workers.

[0028] It is worth noting that the content not described in detail in the above embodiments is prior art. It is also worth noting that any additions, subtractions, substitutions, and improvements made by those skilled in the art based on the structure and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A ventilation device for discharging hydrogen gas from a factory building, comprising a streamlined roof ventilator mounted on a foundation of an opening in the factory roof, the streamlined roof ventilator having a vertically arranged ventilation throat, characterized in that: Multiple lower ventilation valves are arranged at the lower part of the ventilation throat, and multiple combined exhaust units are arranged at the upper part of the ventilation throat. Each combined exhaust unit consists of an explosion-proof fan and multiple upper ventilation valves. A hydrogen concentration sensor is installed on the top of the plant. When the hydrogen concentration sensor alarms, the lower ventilation valves and the explosion-proof fan will open to ventilate and exhaust hydrogen.

2. A ventilation device for discharging hydrogen gas from a factory building as described in claim 1, characterized in that: The upper and lower ventilation valves are opened and closed by an electric mechanism.

3. A ventilation device for discharging hydrogen from a factory building as described in claim 1, characterized in that: Each combined exhaust unit consists of an explosion-proof fan and six upper ventilation valves.

4. A ventilation device for discharging hydrogen from a factory building as described in claim 1, characterized in that: An inspection door is installed at the ventilation vent.

5. A ventilation device for discharging hydrogen from a factory building as described in claim 1, characterized in that: A first hydrogen concentration sensor is installed on the roof of the plant, and a second hydrogen concentration sensor is installed inside the ventilation vent.

6. A ventilation device for discharging hydrogen gas from a factory building as described in claim 5, characterized in that: The ventilation device also includes a grouping control circuit, which is connected to the first hydrogen concentration sensor and the second hydrogen concentration sensor, and is used to control the opening and closing of the upper ventilation valve plate, the lower ventilation valve plate and the explosion-proof fan.

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