Plant hydrogen exhaust ventilation device and ventilation control method

Abstract

The application provides a plant hydrogen exhaust ventilation device and a ventilation control method, and relates to the technical field of plant ventilation.The application comprises a marshalling control circuit and a streamlined roof natural ventilator arranged on the basis of a roof opening of a plant, a plurality of lower ventilation valve plates are arranged in the lower part of a ventilation throat of the streamlined roof natural ventilator, a plurality of combined exhaust units are arranged in the upper part of the ventilation throat, each combined exhaust unit is composed of an anti-explosion fan and a plurality of upper ventilation valve plates; a hydrogen concentration sensor is installed on the roof of the plant, and the marshalling control circuit is connected with the hydrogen concentration sensor. Normally, the marshalling control circuit controls the opening and closing of each upper ventilation valve plate and lower ventilation valve plate, and meets the ventilation requirements of the plant. When hydrogen is generated in the plant, the marshalling control circuit closes the upper ventilation valve plate, opens the lower ventilation valve plate and the anti-explosion fan to perform forced hydrogen exhaust ventilation, and ensures safety, and the economy and comfort of the plant ventilation are considered.

Description

Technical Field

[0001] This invention specifically relates to a hydrogen exhaust ventilation device and ventilation control method for a factory, and pertains 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. Summary of the Invention

[0003] In order to overcome the shortcomings of the prior art, the present invention discloses a hydrogen exhaust ventilation device and ventilation control method for a factory, 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 hydrogen exhaust ventilation device for a factory includes a group control circuit and 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. The group control circuit is connected to the hydrogen concentration sensor and is used to control the opening and closing of the upper ventilation valves, lower ventilation valves, and explosion-proof fan.

[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. A group control circuit is connected to the first and second hydrogen concentration sensors to control the opening and closing of the upper ventilation valve plate, the lower ventilation valve plate, and the explosion-proof fan.

[0009] A factory ventilation control method includes a group control circuit that normally controls the opening and closing of each upper and lower ventilation valve to meet the factory's ventilation requirements while also ensuring the comfort of the factory's temperature. When the first hydrogen concentration sensor and / or the second hydrogen concentration sensor alarm, the group control circuit closes the upper ventilation valve and simultaneously opens the lower ventilation valve and the explosion-proof fan for forced hydrogen exhaust ventilation until the alarm is cleared.

[0010] After implementing the above technical solution, the beneficial effects of the present invention compared with the prior art are as follows: The hydrogen exhaust 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 each upper and lower ventilation valve plate 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 hydrogen exhaust ventilation device of the present 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 shows the natural ventilation of this device in 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] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely for explaining the technical principles of the present invention and are not intended to limit the scope of protection of the present invention. It should be noted that in the description of the present invention, 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 the present invention. It should also be noted that in the description of the present invention, unless otherwise explicitly specified and limited, the terms "installed," "connected," and "linked" 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 the present invention according to the specific circumstances.

[0019] A hydrogen exhaust ventilation device for factory buildings relates to the field of factory ventilation technology and is mainly used to solve the problem of high cost of hydrogen exhaust ventilation in existing technologies. The composition structure and control method of the present invention are described in detail below.

[0020] See attached document Figure 1 and attached Figure 2 The hydrogen exhaust ventilation device for the factory building of the present invention includes a grouping 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 prior art, 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] To illustrate the use of this hydrogen exhaust ventilation device, the present invention also discloses a factory ventilation control method: under normal circumstances, the group control circuit controls the opening and closing of each upper ventilation valve plate 5.2 and lower ventilation valve plate 3 to meet the ventilation requirements of the factory while taking into account the comfort of the temperature inside the factory.

[0025] 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.

[0026] 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.

[0027] See attached document Figure 5When 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 hydrogen exhaust ventilation 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.

[0028] As can be seen from the above, because the present invention is equipped with a hydrogen concentration sensor and forced ventilation measures, it is not necessary to implement the standard requirement of at least 12 air changes per hour to prevent hydrogen explosion and ensure the safety of the factory and workers.

[0029] 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 invention should be included within the scope of protection of this invention.

Claims

1. A ventilation control method for a hydrogen exhaust ventilation device in a factory building, the hydrogen exhaust ventilation device comprising a grouping control circuit and a streamlined roof natural ventilator installed on the foundation of an opening in the factory roof, the streamlined roof natural 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 first hydrogen concentration sensor is installed on the top of the plant, and a second hydrogen concentration sensor is installed inside the ventilation throat. A group control circuit is connected to the first hydrogen concentration sensor and the second hydrogen concentration sensor to control the opening and closing of the upper ventilation valves, lower ventilation valves, and explosion-proof fans. The ventilation control method is as follows: under normal circumstances, the group control circuit controls the opening and closing of each upper and lower ventilation valve to meet the ventilation requirements of the plant and take into account the comfort of the temperature inside the plant; when the first hydrogen concentration sensor and / or the second hydrogen concentration sensor alarms, the group control circuit closes the upper ventilation valve and simultaneously opens the lower ventilation valve and the explosion-proof fan to perform forced hydrogen exhaust ventilation until the alarm is cleared.

2. The ventilation control method for a hydrogen exhaust ventilation device in a factory as described in claim 1, characterized in that: The upper and lower ventilation valve plates are opened and closed by an electric mechanism.

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

4. The ventilation control method for a hydrogen exhaust ventilation device in a factory as described in claim 1, characterized in that: An inspection door is installed at the ventilation vent.

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