WO2025248868A1 - Ammonia-using facility - Google Patents

Abstract

An ammonia-using facility 100 is equipped with: a plurality of conduits L31, L32, L33, L34, L5, L6 through which ammonia gas flows; a plurality of covers 20 which cover the plurality of conduits L31, L32, L33, L34, L5, L6, and each surround a limited region of the plurality of conduits L31, L32, L33, L34, L5, L6; and at least one fan F for drawing in gas from the plurality of covers 20.

Description

Facilities that use ammonia

This disclosure relates to equipment that uses ammonia. This application claims the benefit of priority from Japanese Patent Application No. 2024-088310, filed May 30, 2024, the contents of which are incorporated herein by reference.

Ammonia is used for a variety of purposes in a variety of facilities. For example, Patent Document 1 discloses a boiler system that uses ammonia as fuel. In this boiler system, in one example, the ammonia is stored in a tank. The ammonia in the tank is supplied to a burner via an ammonia supply pipe and combusted in the burner.

JP 2023-95048 A

For example, conduits through which ammonia gas flows may be equipped with various components such as valves. Ammonia is toxic. For this reason, if the conduits extend within a building, it is desirable to be able to prevent the ammonia gas from further spreading within the building in the unlikely event that it leaks from these components.

The present disclosure aims to provide a facility that uses ammonia and that can prevent ammonia gas from diffusing within a building.

One aspect of the present disclosure relates to an ammonia-using facility, which includes a plurality of conduits through which ammonia gas flows, a plurality of covers that cover the plurality of conduits, each of which encloses a limited area of the plurality of conduits, and at least one fan that draws gas through the plurality of covers.

The facility using ammonia may further include a flue that guides exhaust gas to a chimney and an induced draft fan provided in the flue, and at least one fan may include an induced draft fan.

Each of the multiple covers may be divided into multiple pieces.

Each of the multiple covers may be connected to a ventilation pipe that is in fluid communication with at least one fan, and each of the multiple covers may include an exhaust port connected to the ventilation pipe and an intake port that draws in ambient air from outside each of the multiple covers, and the exhaust port may be formed vertically above the intake port.

The facility using ammonia may be provided with an adjuster for each of the multiple covers that adjusts the flow rate of gas flowing from each of the multiple covers to at least one fan.

The facility using ammonia may be provided with an inspection hatch for each of the multiple covers that provides access to the gas flowing from each of the multiple covers to at least one fan.

Each of the multiple covers may enclose at least one of the valve, flexible tube, sensor, and joint.

This disclosure makes it possible to prevent ammonia gas from diffusing within a building.

FIG. 1 is a schematic diagram of an ammonia-using facility according to an embodiment. FIG. 2 is a schematic perspective view showing an example of a cover. FIG. 3 is a schematic exploded perspective view showing the cover of FIG. FIG. 4 is a schematic enlarged side view showing the bottom of the cover 20 as viewed from the X direction in FIG. FIG. 5 is a schematic perspective view showing another example of the cover. FIG. 6 is a schematic exploded perspective view showing the cover of FIG. FIG. 7 is a schematic diagram of an ammonia-using facility according to another embodiment.

Embodiments of the present disclosure will be described in detail below with reference to the accompanying drawings. Specific dimensions, materials, numerical values, etc. shown in these embodiments are merely examples to facilitate understanding and, unless otherwise specified, do not limit the present disclosure. Furthermore, in this specification and drawings, elements having substantially the same functions and configurations are designated by the same reference numerals to avoid redundant explanation, and elements not directly related to the present disclosure are not shown.

FIG. 1 is a schematic diagram of an ammonia-using facility 100 according to an embodiment. In FIG. 1, solid lines indicate conduits through which ammonia gas ga flows, and dashed lines indicate conduits through which ventilation gas gv flows.

Hereinafter, the equipment 100 that uses ammonia may also be simply referred to as "equipment." For example, in this embodiment, the equipment 100 is applied to a boiler 1 in a thermal power plant. In other embodiments, the equipment 100 can be applied to various equipment that uses ammonia.

The boiler 1 includes at least one burner 11. In this embodiment, the boiler 1 includes multiple burners, specifically eight burners 11. The number of burners 11 is not limited to this.

The burner 11 burns fuel containing ammonia gas ga. For example, the burner 11 may burn only ammonia gas ga. Also, for example, the burner 11 may burn a mixture of ammonia gas ga and other fuels such as fossil fuels. Also, for example, if necessary, some of the multiple burners 11 may burn ammonia gas ga, and the remaining multiple burners 11 may burn other fuels. Also, the burners 11 may burn only other fuels if necessary.

In this embodiment, the equipment 100 is equipped with multiple fuel supply systems, specifically four fuel supply systems S1, S2, S3, and S4, for multiple burners 11. The number of fuel supply systems is not limited to this, and may be one, two, three, five or more.

Specifically, the equipment 100 includes a main conduit L1. For example, the main conduit L1 is in fluid communication with an ammonia supply source such as a tank (not shown). The main conduit L1 may also be provided with a vaporizer (not shown).

In this embodiment, the sensor Se may be provided in the main conduit L1. The sensor Se may also be provided in another conduit through which the ammonia gas ga passes. For example, the sensor Se may measure parameters related to the ammonia gas ga (e.g., flow rate, pressure, temperature, etc.). For example, the sensor Se may be removable from the main conduit L1. For example, the sensor Se may be connected to a control device (not shown) so that it can communicate with the control device via wire or wirelessly, and may transmit measurement data to the control device.

The main conduit L1 branches into secondary conduits L21 and L22. Furthermore, the secondary conduit L21 branches into tertiary conduits L31 and L32, and the secondary conduit L22 branches into tertiary conduits L33 and L34. In this embodiment, each of the tertiary conduits L31, L32, L33, and L34 is provided with a reducer (joint) J1 that connects pipes of different diameters to each other.

The first fuel supply system S1 includes a tertiary conduit L31. The second fuel supply system S2 includes a tertiary conduit L32. The third fuel supply system S3 includes a tertiary conduit L33. The fourth fuel supply system S4 includes a tertiary conduit L34.

In this embodiment, the four fuel supply systems S1, S2, S3, and S4 have similar configurations. Therefore, only fuel supply system S1 will be described below. Note that in other embodiments, the four fuel supply systems S1, S2, S3, and S4 may have different configurations.

A first fuel valve V1 is provided in the tertiary conduit L31. The first fuel valve V1 opens and closes the tertiary conduit L31. For example, the first fuel valve V1 may be connected to a control device via wired or wireless communication and may be controlled by the control device.

A second fuel valve V2 is provided in the tertiary conduit L31. The second fuel valve V2 is provided downstream of the first fuel valve V1 in the tertiary conduit L31. The second fuel valve V2 opens and closes the tertiary conduit L31. The second fuel valve V2 may be connected to the control device via wired or wireless communication and may be controlled by the control device.

The tertiary conduit L31 branches into quaternary conduits L41 and L42. Each of the quaternary conduits L41 and L42 is connected to the burner 11. In this embodiment, each of the quaternary conduits L41 and L42 is provided with a reducer (joint) J2, a flexible tube T, and a flange connection (joint) J3.

As described above, in this embodiment, each of the four fuel supply systems S1, S2, S3, and S4 is connected to two burners 11.

Furthermore, in this embodiment, a main vent pipe L5 extends from each of the connection points of the tertiary conduits L31 and L32 and the connection point of the tertiary conduits L33 and L34. For example, the main vent pipe L5 may extend to a location that is safe even if ammonia gas ga is released (not shown).

A main vent valve V3 is provided in the main vent pipe L5. The main vent valve V3 opens and closes the main vent pipe L5. The main vent valve V3 may be connected to the control device via wired or wireless communication and may be controlled by the control device.

In each of the four fuel supply systems S1, S2, S3, and S4, a vent pipe L6 is connected to the tertiary conduit L31 between the first fuel valve V1 and the second fuel valve V2. Each vent pipe L6 merges with the main vent pipe L5 at a position downstream of the main vent valve V3.

A vent valve V4 is provided in the vent pipe L6. The vent valve V4 opens and closes the vent pipe L6. The vent valve V4 may be communicatively connected to the control device via wire or wirelessly, and may be controlled by the control device. For example, in this embodiment, the second fuel valve V2 and the vent valve V4 may be operated simultaneously by a single drive device. In other embodiments, the second fuel valve V2 and the vent valve V4 may be operated by separate drive devices.

In this embodiment, at least some of the components of the equipment 100, including at least valves V1, V2, V3, and V4, are located in a space 40 within a building 50. That is, these components are surrounded by the same building 50 and are located in the same space 40. For example, all of the components of the equipment 100 may be located in the space 40.

For example, ammonia gas (ga) may leak from each of valves V1, V2, V3, and V4 due to various causes. Ammonia is toxic. For this reason, in the unlikely event that ammonia gas (ga) leaks from valves V1, V2, V3, and V4, it is desirable to be able to prevent the ammonia gas (ga) from further spreading within building 50.

To address the above-mentioned issues, the equipment 100 according to this embodiment includes multiple covers 20. Each of the multiple covers 20 encloses a limited area of the multiple conduits.

For example, each cover 20 may enclose a limited area on a single conduit. For example, one cover 20 may enclose a single first fuel valve V1 on tertiary conduits L31, L32, L33, and L34. Also, for example, another cover 20 may enclose a single main vent valve V3 on main vent pipe L5.

Furthermore, each cover 20 may enclose a limited area spanning multiple conduits. For example, another cover 20 may collectively enclose two valves, namely, the second fuel valve V2 on the tertiary conduits L31, L32, L33, and L34, and the vent valve V4 on the vent pipe L6.

In this embodiment, each cover 20 is connected to a ventilation pipe L7. Each ventilation pipe L7 is in fluid communication with the main ventilation pipe L8.

A fan F is provided in the main ventilation pipe L8. The fan F draws in gas (ventilation gas) gv from the multiple covers 20. When ammonia gas ga is not leaking, the ventilation gas gv contains air. When ammonia gas ga is leaking, the ventilation gas gv contains air and ammonia gas ga. For example, the main ventilation pipe L8 may extend to a safe location even if ammonia gas ga is released (not shown). The number of fans F is not limited to one, and may be two or more. For example, the fan F may be connected to a control device so that it can communicate with the control device via wire or wirelessly, and may be controlled by the control device.

A switching damper D1 is provided in the main ventilation pipe L8. The switching damper D1 is configured to open and close the main ventilation pipe L8. In this embodiment, the switching damper D1 is provided downstream of the fan F. The location of the switching damper D1 is not limited to this. For example, the switching damper D1 may be connected to a control device so that it can communicate with the control device via wire or wirelessly, and may be controlled by the control device.

For example, the fan F may be constantly operating. In this case, the switching damper D1 may keep the main ventilation pipe L8 open at all times. Alternatively, the fan F may only operate when ammonia is detected by an ammonia sensor (not shown). In this case, the switching damper D1 may open the main ventilation pipe L8 only when the fan F is operating, and may close the main ventilation pipe L8 at other times.

With the above configuration, if ammonia gas ga leaks from any of the valves V1, V2, V3, or V4, the cover 20 prevents the ammonia gas ga from diffusing into the space 40 within the building 50. Furthermore, the ventilation gas gv within the cover 20 is sucked in by the fan F via the ventilation pipe L7 and the main ventilation pipe L8. Therefore, the ammonia gas ga is prevented from overflowing from the cover 20. Furthermore, each cover 20 only encloses a limited area of the multiple conduits L31, L32, L33, L34, L5, and L6. Therefore, for example, the energy consumption of the fan F can be reduced compared to when the fan F ventilates the entire space 40 within the building 50.

Figure 2 is a schematic perspective view showing an example of the cover 20, and Figure 3 is a schematic exploded perspective view showing the cover 20 of Figure 2. For example, Figures 2 and 3 show a relatively small cover 20.

Referring to FIG. 2, in this embodiment, the cover 20 is divided into multiple pieces 21, 22, 23, and 24. For example, in this embodiment, the cover 20 includes a bottom piece 21, a first upper piece 22, a second upper piece 23, and a top piece 24. For example, the bottom piece 21, the first upper piece 22, the second upper piece 23, and the top piece 24 are assembled to one another by multiple bolts B.

Referring to Figure 3, the cover 20 encloses a limited area of the conduit L, including the valve V. For example, the conduit L may be any of the conduits L31, L32, L33, L34, L5, or L6, and the valve V may be any of the valves V1, V2, V3, or V4. The bottom piece 21, first upper piece 22, second upper piece 23, and top piece 24 can be disassembled by removing the bolt B. This configuration allows the operator to easily access the valve V during maintenance, thereby reducing the burden on the operator.

For example, the bottom piece 21 surrounds the valve V and the lower half of the conduit L from below. For example, during maintenance, the bottom piece 21 may remain attached to the conduit L.

For example, the first upper piece 22, the second upper piece 23, and the top piece 24 surround the valve V and the upper half of the conduit L from above. For example, the first upper piece 22 and the second upper piece 23 may be divided approximately symmetrically with respect to a vertical plane passing through the center line of the conduit L31. For example, the top piece 24 may surround the operating portion of the valve V.

Figure 4 is a schematic enlarged side view showing the bottom of the cover 20 as viewed from the X direction in Figure 2. Figure 4 shows the bottom of the bottom piece 21.

The cover 20 includes an air intake 25. The air intake 25 draws in ambient air from outside the cover 20. For example, the air intake 25 may be formed in the lower half of the cover 20. For example, in this embodiment, the air intake 25 is formed in the bottom surface 21a of the bottom piece 21. For example, in this embodiment, the air intake 25 faces vertically downward. Note that in this embodiment, the bottom surface 21a is spaced apart from the floor (not shown) of the building 50. In other embodiments, the air intake 25 may be formed on another surface of the bottom piece 21 or in another position on the cover 20.

Referring to FIG. 2, the cover 20 includes an exhaust port 26. The exhaust port 26 is connected to the ventilation pipe L7. Therefore, gas inside the cover 20 is sucked into the ventilation pipe L7 through the exhaust port 26. The exhaust port 26 is formed vertically above the intake port 25. For example, the exhaust port 26 may be formed in the upper half of the cover 20. For example, in this embodiment, the exhaust port 26 is formed in the side surface 22a of the first upper piece 22. For example, in this embodiment, the exhaust port 26 faces horizontally. In other embodiments, the exhaust port 26 may be formed in another surface of the first upper piece 22, or in another position on the cover 20.

Ammonia gas (ga) is lighter than air. Therefore, for example, if ammonia gas (ga) leaks from valve V, the ammonia gas (ga) tends to accumulate at the top of the cover 20. With the above configuration, the ammonia gas (ga) can be quickly sucked in through the exhaust port 26 formed at the top of the cover 20. Furthermore, with the above configuration, ammonia gas (ga) is less likely to leak to the outside through the intake port 25 formed at the bottom of the cover 20. Therefore, it is possible to prevent ammonia gas (ga) from diffusing outside the cover 20.

4, the system 100 includes an adjuster A for each cover 20 that adjusts the flow rate of the ventilation gas gv flowing from the cover 20 to the fan F. For example, in this embodiment, the adjuster A is provided in the air intake 25 of the cover 20. In this embodiment, the flow rate of the ventilation gas gv is adjusted by adjusting the flow rate of air sucked in through the air intake 25. For example, in this embodiment, the adjuster A includes a sliding plate that can adjust the opening of the air intake 25. For example, in FIG. 4, the adjuster A is slidable in a direction perpendicular to the paper surface. For example, the bottom piece 21 may include a groove or slot into which the adjuster A is inserted. The adjuster A is not limited to this and may include various configurations that can adjust the area of the flow path, such as a valve or a flap. In other embodiments, for example, the adjuster A may be provided in the exhaust port 26 or the ventilation pipe L7. In this case, the flow rate of the ventilation gas gv flowing from the cover 20 to the fan F can be directly adjusted.

Referring to FIG. 2, the system 100 includes an inspection hatch H for each cover 20, which provides access to the ventilation gas gv flowing from the cover 20 to the fan F. For example, in this embodiment, the inspection hatch H is provided in the ventilation pipe L7. For example, in other embodiments, the inspection hatch H may be provided in the exhaust port 26, or may be provided in another position on the cover 20. For example, the inspection hatch H may be closed with a cap or lid.

For example, to detect leakage of ammonia gas (ga), an ammonia sensor may be installed between multiple covers 20 and the fan F. However, installing an ammonia sensor for every cover 20 would increase equipment costs.

To address this issue, for example, one ammonia sensor can be installed for several covers 20. For example, if an ammonia leak is actually detected by a certain ammonia sensor, the caps or lids of the inspection hatches H of several covers 20 that are in fluid communication with this ammonia sensor can be opened, and another ammonia sensor can be inserted into the ventilation pipe L7. With this configuration, the operator can identify the cover 20 from which ammonia gas ga is leaking from among multiple covers 20.

Figure 5 is a schematic perspective view showing another example of the cover 20, and Figure 6 is a schematic exploded perspective view showing the cover 20 of Figure 5. Note that the ventilation pipe L7, air intake 25, adjuster A, and inspection hatch H are omitted from Figures 5 and 6.

For example, Figures 5 and 6 show a relatively large cover 20. For example, the cover 20 of Figures 5 and 6 differs from the cover 20 of Figures 2 and 3 in the size of the cover 20. Also, for example, the cover 20 of Figures 5 and 6 differs from the cover 20 of Figures 2 and 3 in that the cover 20 of Figures 5 and 6 does not include a top piece 24. Also, for example, the cover 20 of Figures 5 and 6 differs from the cover 20 of Figures 2 and 3 in that the first upper piece 22 of Figures 5 and 6 is further divided into multiple pieces 22b, 22c, 22d, and 22e. In other respects, the cover 20 of Figures 5 and 6 may be similar to the cover 20 of Figures 2 and 3. Such a cover 20 of Figures 5 and 6 can achieve the same effects as the cover 20 of Figures 2 and 3.

The above-described equipment 100 comprises a plurality of conduits L31, L32, L33, L34, L5, and L6 through which ammonia gas ga flows, and a plurality of covers 20 that cover the plurality of conduits L31, L32, L33, L34, L5, and L6, each of which encloses a limited area of the plurality of conduits L31, L32, L33, L34, L5, and L6, and at least one fan F that draws ventilation gas gv from the plurality of covers 20. As described above, with this configuration, the covers 20 prevent ammonia gas ga from diffusing into the space 40 within the building 50. Furthermore, the ammonia gas ga within the covers 20 is drawn in by the fan F. Therefore, ammonia gas ga is prevented from overflowing from the covers 20. Furthermore, each cover 20 only encloses a limited area of the plurality of conduits L31, L32, L33, L34, L5, and L6. Therefore, for example, the energy consumption of the fan F can be reduced compared to when the fan F ventilates the entire space 40 within the building 50.

Furthermore, in the equipment 100, each cover 20 is divided into multiple pieces 21, 22, 23, and 24. With this configuration, for example, an operator can easily remove the cover 20 during maintenance.

Furthermore, in the equipment 100, each cover 20 is connected to a ventilation pipe L7 that is fluidly connected to the fan F, and each cover includes an exhaust port 26 connected to the ventilation pipe L7 and an intake port 25 that draws in ambient air from outside the cover 20, with the exhaust port 26 being formed vertically above the intake port 25. As described above, ammonia gas ga is lighter than air. Therefore, ammonia gas ga tends to accumulate at the top of the cover 20. With the above configuration, ammonia gas ga can be quickly drawn in by the exhaust port 26 formed at a higher position. Furthermore, with the above configuration, ammonia gas ga is less likely to leak to the outside from the intake port 25 formed at a lower position. Therefore, it is possible to prevent ammonia gas ga from diffusing outside the cover 20.

The equipment 100 also includes an adjuster A for each cover 20 that adjusts the flow rate of ventilation gas gv flowing from each cover 20 to the fan F. The distance between the fan F and the cover 20 varies depending on the position of the cover 20 within the building 50. Therefore, the fan F is more likely to draw gas from covers 20 closer to the fan F. In this case, it takes time to ventilate covers 20 farther from the fan F. With the above configuration, the adjuster A can adjust the flow rate of ventilation gas gv from each cover 20. Therefore, the time required to ventilate each cover 20 can be adjusted.

Furthermore, the equipment 100 is equipped with an inspection hatch H for each cover 20, which allows access to the ventilation gas gv flowing from each cover 20 to the fan F. With this configuration, as described above, an operator can identify the cover 20 from which ammonia gas ga is leaking, without having to install an ammonia sensor for every cover 20. This makes it possible to suppress increases in equipment costs.

Next, other embodiments will be described.

FIG. 7 is a schematic diagram of an ammonia-using facility 200 according to another embodiment. The facility 200 differs from the facility 100 according to the above embodiment in that, in addition to the fan F, an induced draft fan (IDF) 4 is used to ventilate the multiple covers 20. In other respects, the facility 200 may be similar to the facility 100.

More specifically, in this embodiment, the main ventilation pipe L8 is connected to the flue 2 by a connecting pipe L9. The flue 2 directs exhaust gas from the combustor to the chimney 5. For example, in this embodiment, the flue 2 may be connected to a boiler 1 and may receive exhaust gas from multiple burners 11. In other embodiments, the flue 2 may be connected to other equipment and may receive exhaust gas from other combustors.

For example, a gas air heater (GAH) 3 may be provided in the flue 2. The GAH 3 uses exhaust gas to heat the air supplied to the combustor. The IDF 4 draws in exhaust gas from the combustor and directs it to the chimney 5. In this embodiment, the IDF 4 is located downstream of the GAH 3.

Note that the flue 2, GAH 3, IDF 4, and chimney 5 may also be provided in the equipment 100 shown in Figure 1.

The connecting pipe L9 is connected to the flue 2 at a position upstream of the IDF4. In this embodiment, the connecting pipe L9 is connected to the flue 2 at a position between the GAH3 and the IDF4.

A switching damper D2 is provided in the connecting pipe L9. The switching damper D2 is configured to open and close the connecting pipe L9. For example, the switching damper D2 may be connected to the control device via wired or wireless communication and may be controlled by the control device.

For example, if no ammonia gas (ga) leakage is detected in any of the covers 20, ventilation of the covers 20 may be performed using the spare capacity of the IDF 4. In this case, the switching damper D2 opens the connecting pipe L9. Also, in this case, the fan F does not need to operate, and the switching damper D1 may close the main ventilation pipe L8.

For example, if a leak of ammonia gas (ga) is detected in any of the covers 20, ventilation of the cover 20 may be performed by the fan F. In this case, the switching damper D2 closes the connecting pipe L9. Also, in this case, the fan F operates, and the switching damper D1 opens the main ventilation pipe L8.

The above-described equipment 200 can achieve the same effects as the above-described equipment 100. Furthermore, the equipment 200 further includes a flue 2 that guides exhaust gas to a chimney, and an IDF 4 provided in the flue 2, and at least one fan includes the IDF 4. With this configuration, for example, as described above, if no ammonia gas (ga) leakage is detected in any of the covers 20, ventilation of the covers 20 can be carried out using the spare capacity of the IDF 4. Therefore, additional energy required for ventilation of the covers 20 can be reduced.

Although the embodiments have been described above with reference to the accompanying drawings, the present disclosure is not limited to the above-described embodiments. It is clear that a person skilled in the art could conceive of various modifications or alterations within the scope of the claims, and it is understood that these naturally fall within the technical scope of the present disclosure.

For example, in the above embodiment, the cover 20 encloses the first fuel valve V1, the second fuel valve V2, and the vent valve V4. In other embodiments, the cover 20 may enclose other areas where ammonia gas ga is expected to leak. For example, the cover 20 may enclose at least one of the flexible tube T, the sensor Se, and the joints J1, J2, and J3. In this case, too, it is possible to prevent ammonia gas ga from diffusing within the building 50.

The present disclosure can promote the use of ammonia, which leads to reduced _CO2 emissions, and can therefore contribute, for example, to Sustainable Development Goal (SDG) Goal 7, "Ensure access to affordable, reliable, sustainable and modern energy," and Goal 13, "Take urgent action to combat climate change and its impacts."

2 Flue 4 Induced draft fan (fan)
5 Chimney 20 Cover 21 Bottom piece 22 First upper piece 22b Piece 22c Piece 22d Piece 22e Piece 23 Second upper piece 24 Top piece 25 Intake port 26 Exhaust port 100 System A Adjuster F Fan g a Ammonia gas g v Ventilation gas H Inspection port J1 Reducer (joint)
J2 Reducer (Joint)
J3 flange connection (joint)
L5 Main vent pipe (ammonia flow pipe)
L6 Vent pipe (pipe through which ammonia flows)
L7 Ventilation pipe L31 Tertiary conduit (pipe through which ammonia flows)
L32 Tertiary pipe (pipe through which ammonia flows)
L33 Tertiary pipe (pipe through which ammonia flows)
L34 Tertiary pipe (pipe through which ammonia flows)
Se Sensor T Flexible tube V1 First fuel valve V2 Second fuel valve V3 Main vent valve V4 Vent valve

Claims (7)

a plurality of conduits through which ammonia gas flows;
a plurality of covers covering the plurality of conduits, each of the plurality of covers enclosing a limited area of the plurality of conduits;
at least one fan that draws gas through the plurality of covers;
Ammonia-using equipment. A flue that leads exhaust gas to a chimney;
an induced draft fan provided in the flue;
Furthermore,
The at least one fan includes the induced draft fan.
A facility that uses the ammonia according to claim 1. Each of the plurality of covers is divided into a plurality of pieces.
A facility that uses the ammonia according to claim 1. each of the plurality of covers is connected to a ventilation pipe in fluid communication with the at least one fan;
Each of the plurality of covers is
an exhaust port connected to the ventilation pipe;
an air intake port for drawing ambient air from the exterior of each of the plurality of covers;
Including,
The exhaust port is formed vertically above the intake port.
A facility that uses the ammonia according to claim 1. an adjuster for each of the plurality of covers that adjusts the flow rate of gas flowing from each of the plurality of covers to the at least one fan;
A facility that uses the ammonia according to claim 1. an inspection hatch for each of the plurality of covers that provides access to gas flowing from each of the plurality of covers to the at least one fan;
A facility that uses the ammonia according to claim 1. each of the plurality of covers encloses at least one of a valve, a flexible tube, a sensor, and a joint;
A facility that uses the ammonia according to claim 1.