Ammonia absorbing apparatus and ammonia absorbing method

Abstract

The application relates to the ship technology field, and particularly discloses an ammonia absorption device and an ammonia absorption method. The ammonia absorption device comprises a gas-permeable pipe, an ammonia gas sensor, a liquid tank and a spray assembly. The gas-permeable pipe has an air inlet cavity, a collecting cavity and a gas-permeable cavity which are sequentially connected. The air inlet cavity is used for releasing ammonia-containing gas into the collecting cavity. The ammonia gas sensor is arranged in the air inlet cavity. The liquid tank has a containing cavity for containing absorption liquid. The spray assembly comprises a liquid delivery pipe, a spray pipe and nozzles. Two ends of the liquid delivery pipe are respectively connected to the containing cavity and the spray pipe. A plurality of nozzles are arranged on the spray pipe. The spray heads of the nozzles penetrate into the collecting cavity. The liquid delivery pipe is used for inputting absorption liquid into the spray pipe. A circulating pump is arranged on the liquid delivery pipe. A discharge pipe is connected to the bottom of the collecting cavity and the containing cavity. The discharge pipe is used for discharging absorption liquid at the bottom of the collecting cavity into the containing cavity, so that ammonia-removed gas is released from the gas-permeable cavity. Therefore, the ammonia absorption device can reduce direct ammonia emission and protect the life safety of the crew.

Description

Technical Field

[0001] This application relates to the field of marine technology, and in particular to an ammonia absorption device and ammonia absorption method. Background Technology

[0002] In the current technology, with the promotion of carbon emission reduction in ships, ammonia fuel is becoming increasingly popular. To ensure the safety of ammonia fuel use, its maintenance and supply systems need to be equipped with venting and release pipelines to prevent the accumulation of flammable gases, thereby preventing fires and explosions.

[0003] In addition, since ammonia fuel is not only flammable and explosive, but also highly toxic to humans, if unburned ammonia gas is released directly into the atmosphere, it may be inhaled by crew members, leading to poisoning and endangering their lives. Summary of the Invention

[0004] The purpose of this invention is to provide an ammonia absorption device and ammonia absorption method that can solve the problem of the danger to the lives of crew members caused by the direct emission of ammonia in the prior art.

[0005] To achieve the above objectives, this application adopts the following technical solution:

[0006] In a first aspect, an ammonia absorption device is provided, comprising:

[0007] A vent pipe has an air inlet chamber, a collection chamber, and a vent chamber connected in sequence, wherein the air inlet chamber is used to release ammonia-containing gas into the collection chamber;

[0008] An ammonia sensor is installed in the air intake chamber to detect the ammonia concentration in the air intake chamber.

[0009] A liquid tank having a cavity for holding the absorbent liquid;

[0010] A spray assembly includes an infusion tube, a spray pipe, and nozzles. The two ends of the infusion tube are respectively connected to the receiving cavity and the spray pipe. The spray pipe is provided with a plurality of nozzles. The nozzle heads penetrate into the collecting cavity. The infusion tube is used to input the absorbent liquid into the spray pipe so that the absorbent liquid sprayed by the nozzles absorbs the ammonia gas in the collecting cavity.

[0011] A circulation pump, installed on the infusion tube, is used to drive the absorbent in the receiving cavity into the infusion tube;

[0012] The drain pipe has its two ends connected to the bottom of the collection chamber and the receiving chamber, respectively. The drain pipe is used to discharge the absorbent liquid located at the bottom of the collection chamber to the receiving chamber, so that the gas after ammonia removal can be released from the venting chamber.

[0013] As a preferred embodiment of the ammonia absorption device, it also includes:

[0014] The pressure balancing assembly includes a safety valve and an inflation pipe and a return pipe respectively connected to the receiving cavity. The safety valve is disposed in the return pipe. The inflation pipe is used to input inert gas, and the return pipe is used to discharge gas in the receiving cavity to the collecting cavity.

[0015] As a preferred embodiment of the ammonia absorption device, it also includes:

[0016] A replenishment tube is connected to the receiving cavity, and the replenishment tube is used to input the absorbent liquid that has not absorbed ammonia;

[0017] A drain pipe is connected to the bottom of the receiving cavity, and the drain pipe is used to discharge the absorbent liquid that has absorbed ammonia.

[0018] As a preferred embodiment of the ammonia absorption device, the ammonia sensor is installed in the venting chamber, and the ammonia absorption device further includes:

[0019] A liquid level sensor is disposed in the receiving cavity and / or the collecting cavity for detecting the liquid level height in the receiving cavity and / or the collecting cavity;

[0020] An ammonia concentration sensor is disposed in the containment cavity to detect the ammonia concentration of the absorption liquid;

[0021] Solenoid valves are respectively installed in the replenishment pipe and the drain pipe.

[0022] As a preferred embodiment of the ammonia absorption device, the vent pipe includes a release pipe and a collection pipe, the air inlet chamber is located in the release pipe, the release pipe has a release hole for releasing ammonia-containing gas, and the collection pipe has the collection chamber and the vent pipe arranged in sequence, with the release hole communicating with the collection chamber.

[0023] As a preferred embodiment of the ammonia absorption device, it also includes:

[0024] An overflow pipe has its two ends connected to the collection chamber and the receiving chamber, respectively. The height of the overflow pipe opening connected to the collection chamber is lower than the height of the air inlet connecting to the release hole.

[0025] Secondly, an ammonia absorption method is provided, applied to the ammonia absorption device, comprising:

[0026] Ammonia-containing gas is introduced into the vent pipe so that the ammonia-containing gas is released from the inlet chamber of the vent pipe into the collection chamber;

[0027] The ammonia concentration in the air inlet chamber of the vent pipe is detected by an ammonia sensor.

[0028] When the ammonia concentration reaches a specified threshold, the circulation pump is activated so that the absorbent in the tank's containment chamber enters the spray assembly, flows from the delivery pipe through the spray pipe to the nozzle, and is sprayed into the collection chamber of the vent pipe to dissipate the ammonia.

[0029] The absorbent liquid located at the bottom of the collection chamber is discharged into the receiving chamber through the drain pipe;

[0030] The gas after ammonia removal is released from the venting chamber.

[0031] As a preferred option for ammonia absorption methods, the following also includes:

[0032] The air pressure value in the receiving cavity is detected by an air pressure sensor;

[0033] When the air pressure value is lower than the first air pressure threshold, inert gas is injected into the receiving cavity through the air filling tube of the air pressure balancing component;

[0034] When the air pressure value reaches the second air pressure threshold, the inflation of the air tube is paused;

[0035] When the air pressure reaches the third air pressure threshold, the safety valve opens, and the gas in the containment chamber enters the collection chamber from the return air pipe.

[0036] As a preferred option for ammonia absorption methods, the following also includes:

[0037] The ammonia concentration of the absorbent liquid in the containment cavity is detected by an ammonia concentration sensor;

[0038] When the ammonia concentration reaches the first concentration threshold, the solenoid valve on the drain pipe is opened to discharge the absorbent liquid that has absorbed ammonia from the containment cavity.

[0039] When the ammonia concentration is lower than the second concentration threshold, the solenoid valve on the drain pipe is closed;

[0040] The first liquid level height in the receiving cavity is detected by a liquid level sensor;

[0041] When the first liquid level is lower than the first height threshold, the solenoid valve of the replenishment pipe is opened, and the absorbent liquid that has not absorbed ammonia is input into the containment cavity through the replenishment pipe;

[0042] When the first liquid level reaches the second height threshold, the solenoid valve of the replenishment pipe is closed.

[0043] As a preferred option for ammonia absorption methods, the following also includes:

[0044] The second liquid level height in the collection chamber is detected by a liquid level sensor;

[0045] When the second liquid level reaches the second height threshold, the speed of the circulation pump is reduced.

[0046] The beneficial effects of this application are as follows:

[0047] By introducing ammonia-containing gas into the vent pipe, which sequentially connects an inlet chamber, a collection chamber, and another vent chamber, the ammonia-containing gas can be released from the inlet chamber into the collection chamber. Simultaneously, an ammonia sensor is installed in the inlet chamber to detect the ammonia concentration, and the liquid tank contains a container for holding the absorbent liquid. When ammonia is present in the inlet chamber, a circulating pump draws the absorbent liquid from the container into a spray assembly, which then sprays it into the collection chamber, allowing the absorbent liquid to absorb the ammonia-containing gas in the collection chamber.

[0048] The spray assembly includes an infusion pipe, a spray pipe, and nozzles. The infusion pipe connects to a receiving chamber and the spray pipe at both ends, respectively. Multiple nozzles are installed on the spray pipe, with the nozzle heads extending into the collection chamber. When the circulating pump on the infusion pipe draws absorbent liquid from the receiving chamber, the absorbent liquid flows along the infusion pipe into the spray pipe, and then, guided by the spray pipe, reaches the nozzle heads, where it is sprayed into the collection chamber. This increases the contact area between the absorbent liquid and ammonia gas, thus improving the absorption efficiency of ammonia. Under gravity, the absorbent liquid that has absorbed ammonia settles to the bottom of the collection chamber, while the ammonia-free gas flows to the venting chamber and is released through the venting chamber.

[0049] In addition, a drain pipe is set up at both ends, connecting to the bottom of the collection chamber and the receiving chamber respectively. The absorbent liquid that settles to the bottom of the collection chamber flows back into the receiving chamber along the drain pipe. On the one hand, this reduces the space occupied by the collection chamber. On the other hand, it makes it easier for the liquid to be sucked into the infusion tube again and sprayed into the collection chamber by the nozzle, so as to absorb ammonia gas through droplet form with a large contact area as much as possible.

[0050] Therefore, the ammonia absorption device of this application absorbs ammonia gas using an absorbent liquid in the form of droplets, allowing the gas after ammonia removal to be discharged from the venting chamber of the vent pipe. This reduces the direct emission of ammonia gas, thereby preventing crew members from accidentally inhaling it and endangering their lives. Furthermore, the absorbent liquid after absorbing ammonia gas can be recycled, improving the utilization rate of ammonia gas and saving resources while being environmentally friendly. Attached Figure Description

[0051] The present application will now be described in further detail with reference to the accompanying drawings and embodiments.

[0052] Figure 1 This is a schematic diagram of the structure of an ammonia absorption device provided in an embodiment of this application.

[0053] Figure 2 This is a partial structural schematic diagram of an ammonia absorption device provided in an embodiment of this application.

[0054] In the picture:

[0055] 1. Vent tube; 100. Release hole; 101. Release tube; 102. Collection tube; 11. Air inlet chamber; 12. Collection chamber; 13. Vent chamber;

[0056] 21. Ammonia gas sensor; 22. Liquid level sensor; 23. Ammonia concentration sensor; 24. Solenoid valve;

[0057] 3. Liquid tank; 31. Receiving cavity;

[0058] 4. Spray assembly; 41. Infusion tubing; 42. Spray pipe; 43. Nozzle;

[0059] 5. Circulating pump; 61. Drain pipe; 62. Make-up pipe; 63. Drain pipe; 64. Overflow pipe;

[0060] 7. Pressure balancing assembly; 71. Safety valve; 72. Inflation pipe; 73. Return pipe; 74. Pressure sensor; 8. Demister. Detailed Implementation

[0061] To make the technical problems solved by this application, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of this application are further described in detail below. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments in this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0062] In the description of this application, unless otherwise expressly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0063] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0064] To address the safety hazards to seafarers caused by the direct emission of ammonia in existing technologies, such as... Figure 1 As shown, this embodiment provides an ammonia absorption device, including:

[0065] The vent pipe 1 has an air inlet chamber 11, a collection chamber 12 and a venting chamber 13 connected in sequence. The air inlet chamber 11 is used to release ammonia-containing gas into the collection chamber 12.

[0066] An ammonia sensor 21 is installed in the air inlet chamber 11 to detect the ammonia concentration in the air inlet chamber 11.

[0067] The liquid tank 3 has a receiving cavity 31 for holding the absorbent liquid;

[0068] The spray assembly 4 includes an infusion pipe 41, a spray pipe 42, and nozzles 43. The two ends of the infusion pipe 41 are connected to the receiving cavity 31 and the spray pipe 42, respectively. Multiple nozzles 43 are provided on the spray pipe 42. The nozzles 43 penetrate into the collection cavity 12. The infusion pipe 41 is used to input absorbent liquid into the spray pipe 42 so that the absorbent liquid sprayed by the nozzles 43 absorbs the ammonia gas in the collection cavity 12.

[0069] A circulation pump 5 is installed on the infusion tube 41 to drive the absorbent in the receiving cavity 31 into the infusion tube 41.

[0070] The drain pipe 61 is connected at both ends to the bottom of the collection chamber 12 and the receiving chamber 31, respectively. The drain pipe 61 is used to discharge the absorbent liquid located at the bottom of the collection chamber 12 to the receiving chamber 31 so that the gas after ammonia removal can be released from the venting chamber 13.

[0071] By introducing ammonia-containing gas into the vent pipe 1, the gas can be released from the inlet chamber 11 to the collection chamber 12, since the vent pipe 1 is sequentially connected to the inlet chamber 11, the collection chamber 12, and the venting chamber 13. Simultaneously, an ammonia sensor 21 is installed in the inlet chamber 11 to detect the ammonia concentration, and the liquid tank 3 has a container 31 for holding the absorbent liquid. When ammonia is present in the inlet chamber 11, the absorbent liquid in the container 31 is drawn into the spray assembly 4 by the circulation pump 5, and then sprayed into the collection chamber 12 by the spray assembly 4, allowing the absorbent liquid to absorb the ammonia-containing gas in the collection chamber 12.

[0072] The spray assembly 4 includes an infusion pipe 41, a spray pipe 42, and nozzles 43. The two ends of the infusion pipe 41 are connected to the receiving chamber 31 and the spray pipe 42, respectively. Multiple nozzles 43 are installed on the spray pipe 42, with the nozzle heads extending into the collection chamber 12. When the circulation pump 5 on the infusion pipe 41 draws absorbent liquid from the receiving chamber 31, the absorbent liquid flows along the infusion pipe 41 into the spray pipe 42, and then, guided by the spray pipe 42, reaches the nozzle heads of the nozzles 43, thus being sprayed into the collection chamber 12. This increases the contact area between the absorbent liquid and ammonia gas, which is beneficial for improving the absorption efficiency of ammonia gas. Under the action of gravity, the absorbent liquid that has absorbed ammonia gas settles to the bottom of the collection chamber 12, while the gas after ammonia removal flows to the venting chamber 13 and is released through the venting chamber.

[0073] In addition, a drain pipe 61 is provided at both ends, which are connected to the bottom of the collection chamber 12 and the receiving chamber 31 respectively. The absorbent liquid that settles to the bottom of the collection chamber 12 is returned to the receiving chamber 31 along the drain pipe 61. On the one hand, this reduces the space occupied by the collection chamber 12. On the other hand, it is convenient for the liquid to be sucked into the collection chamber 12 again by the infusion tube 41 and sprayed into the collection chamber 12 by the nozzle 43, so as to absorb ammonia gas by using droplets with a large contact area as much as possible.

[0074] Therefore, the ammonia absorption device of this application absorbs ammonia gas using an absorbent in the form of droplets, allowing the gas to be discharged from the vent chamber 13 of the vent pipe 1 after ammonia removal. This reduces the direct emission of ammonia gas, thereby preventing crew members from accidentally inhaling it and endangering their lives. Furthermore, the absorbent after absorbing ammonia gas can be recycled, improving the utilization rate of ammonia gas and saving resources for the environment.

[0075] In one embodiment, reference Figure 1 The ammonia absorption device of this application also includes a pressure balancing component 7, which includes a safety valve 71 and an inflation pipe 72 and a return pipe 73 respectively connected to the receiving chamber 31. The safety valve 71 is positioned in the return pipe 73. The inflation pipe 72 allows the input of inert gas, while the return pipe 73 allows the outlet of gas from the receiving chamber 31 to the collection chamber 12. When excessive absorbent is discharged from the receiving chamber 31, causing a drop in pressure within the chamber, the circulating pump 5 will struggle to continue drawing absorbent into the delivery pipe 41. In this case, inert gas is introduced through the inflation port to balance the pressure between the receiving chamber 31 and the spray pipe 42, facilitating the continuous intake of absorbent from the receiving chamber 31 into the spray pipe 42. When too much inert gas is introduced into the inflation pipe 72, excessively high pressure in the receiving chamber 31 may cause absorbent to backflow into the collection chamber 12 through the drain pipe 61. At this time, the air pressure in the receiving chamber 31 is sensed by the safety valve 71 installed in the return air pipe 73. When the air pressure in the receiving chamber 31 is too high, the overcharged inert gas is introduced into the collection chamber 12 by opening the safety valve 71, thereby preventing the absorbent liquid from flowing back through the drain pipe 61.

[0076] In a preferred embodiment, the exhaust port of the return pipe 73 is located between the air inlet chamber 11 and the spray pipe 42, so that when the ammonia gas accidentally released from the absorbent liquid in the containment chamber 31 flows back to the collection chamber 12 through the return pipe 73, it can continue to be absorbed by the absorbent liquid in droplet form. This prevents the ammonia gas in the containment chamber 31 from flowing directly to the venting chamber 13 and being discharged into the atmosphere after entering the collection chamber 12, thereby further reducing the amount of ammonia gas emitted.

[0077] Optionally, refer to Figure 1 The air pressure balancing assembly 7 also includes an air pressure sensor 74 disposed in the receiving cavity 31. The air pressure in the receiving cavity 31 is detected by the air pressure sensor 74, and the inflation time of the inflation tube 72 can be determined based on the detection result of the air pressure sensor 74 to reduce over-inflation of the receiving cavity 31.

[0078] Since the solubility of ammonia in the absorbent is limited, to avoid excessive ammonia saturation in the absorbent of chamber 31, which could affect the subsequent absorption efficiency of ammonia in collection chamber 12, in particular, refer to... Figure 1 The ammonia absorption device of this application also includes a replenishment pipe 62 and a drain pipe 63. The replenishment pipe 62 is connected to the receiving cavity 31, and the drain pipe 63 is connected to the bottom of the receiving cavity 31. The absorbent liquid that has absorbed ammonia is discharged through the drain pipe 63, and the absorbent liquid that has not absorbed ammonia is introduced through the replenishment pipe 62, which can replace the absorbent liquid in a timely manner to ensure the absorption efficiency of ammonia gas.

[0079] Further, refer to Figure 1 An ammonia sensor 21 is installed in the venting chamber 13 to detect the ammonia concentration. If ammonia is present in the venting chamber 13, it indicates that the absorption efficiency of the absorbent is too low, and the absorbent in the receiving chamber 31 needs to be replaced. Furthermore, when the drain pipe 63 and the replenishment pipe 62 are activated, the input of ammonia-containing gas into the air inlet chamber 11 can be stopped, reducing the amount of ammonia reaching the venting chamber 13. The circulation pump 5 can remain operational. When the absorbent in the receiving chamber 31 is discharged through the drain pipe 63, the circulation pump 5 can draw in gas from the receiving chamber 31 and discharge the absorbent in the spray assembly 4, allowing the absorbent remaining in the spray assembly 4 to be discharged into the collecting chamber 12 and back into the receiving chamber 31 along the drain pipe 61, and then discharged through the drain pipe 63. Only after the absorbent in the receiving chamber 31 is discharged is unabsorbed absorbent input through the replenishment pipe 62 to improve the subsequent absorption effect of ammonia in the collecting chamber 12.

[0080] Furthermore, refer to Figure 1The ammonia absorption device also includes a level sensor 22, an ammonia concentration sensor 23, and a solenoid valve 24. The level sensor 22 is located in the receiving cavity 31 and can detect the liquid level height within the cavity. By setting different level sensors 22 at different heights within the cavity 31, changes in liquid level can be sensed. The solenoid valves 24 are located in the replenishment pipe 62 and the drain pipe 63. When the absorbent in the receiving cavity 31 reaches a designated level, the corresponding level sensor 22 is activated, which in turn activates the solenoid valve 24 to perform corresponding replenishment or draining operations. For example, if the liquid level in the receiving cavity 31 reaches the lower level sensor 22, it indicates that the absorbent in the cavity 31 is insufficient, and the solenoid valve 24 in the replenishment pipe 62 needs to be opened to replenish the unabsorbed ammonia. If the liquid level in the receiving cavity 31 reaches the higher level sensor 22, it indicates that the absorbent in the cavity 31 is sufficient, and the solenoid valve 24 in the replenishment pipe 62 is closed to stop replenishing the absorbent. Alternatively, when the level of the absorbent liquid in the receiving cavity 31 reaches the level sensor 22 located at a higher position, it indicates that there is too much absorbent liquid in the receiving cavity 31 at this time, and it is necessary to open the solenoid valve 24 in the drain pipe 63 to drain the excess absorbent liquid.

[0081] Alternatively, the liquid level sensor 22 can be installed in the collection chamber 12 to detect the liquid level. When the liquid level of the absorbent in the collection chamber 12 reaches the liquid level sensor 22, it indicates that too much absorbent has been released from the collection chamber 12. At this point, the operation of the circulation pump 5 is stopped, and the drain pipe is allowed to drain the absorbent from the collection chamber 12 in time. Furthermore, when the circulation pump 5 stops operating, the input of ammonia-containing gas into the air intake chamber 11 is also stopped.

[0082] If both the collecting chamber 12 and the receiving chamber 31 are equipped with liquid level sensors 22, the changes in liquid level in the collecting chamber 12 and the receiving chamber 31 can be detected simultaneously, so as to control the circulating pump 5 and the solenoid valve 24 in a timely manner, so as to prevent the absorbent from flowing back from the receiving chamber 31 to the collecting chamber 12, or from overflowing from the collecting chamber 12 into the air inlet chamber 11 or the air venting chamber 13.

[0083] In this embodiment, an ammonia concentration sensor 23 is also installed in the receiving cavity 31. The ammonia concentration sensor 23 detects the ammonia concentration of the absorbent. When the ammonia concentration of the absorbent is too high, the solenoid valve 24 on the drain pipe 63 needs to be opened in time to drain the absorbent. When the absorbent is drained from the drain pipe 63, the solenoid valve 24 in the replenishment pipe 62 can also be opened at the same time. This reduces the ammonia concentration of the absorbent and replenishes the receiving cavity 31 with absorbent. This improves the absorption effect of the absorbent on the ammonia in the collection cavity 12 without stopping the circulation pump 5, allowing for a continuous supply of ammonia-containing gas and absorption of ammonia.

[0084] In another embodiment, reference Figure 1 The vent pipe 1 includes a release pipe 101 and a collection pipe 102. An inlet chamber 11 is located within the release pipe 101. The release pipe 101 has a release hole 100 for releasing ammonia-containing gas. The collection pipe 102 has a collection chamber 12 and a vent chamber 13 arranged sequentially. The release hole 100 is connected to the collection chamber 12, allowing ammonia-containing gas to be introduced through the release pipe 101 and then output to the collection chamber 12 through the release hole 100. By changing the position and number of release holes 100, different outlet positions and rates can be changed to match nozzles 43 with different spraying efficiencies and spraying distances, ensuring the absorption efficiency of the absorbent liquid for ammonia.

[0085] Preferably, refer to Figure 1 The ammonia absorption device of this application also includes an overflow pipe 64, with its two ends connected to the collection chamber 12 and the receiving chamber 31, respectively. This allows the absorbent liquid in the collection chamber 12 to flow out of the overflow pipe 64 and into the receiving chamber 31 when it reaches the inlet of the overflow pipe 64, thus preventing the absorbent liquid level in the collection chamber 12 from being too high and affecting the ammonia absorption effect. In this embodiment, the height of the inlet of the overflow pipe 64 connecting to the collection chamber 12 is lower than the height of the inlet chamber 11 connecting to the release hole 100. This also prevents the absorbent liquid from flowing back into the inlet chamber 11, reduces blockage of the release hole 100, and maintains the gas output efficiency of the release hole 100.

[0086] Regarding the arrangement of the spray pipe 42 and the nozzle 43, the spray pipe 42 can be positioned at the top of the collection chamber 12, while the nozzle 43 can be positioned at the bottom of the spray pipe 42 and extend into the collection chamber 12. Gravity causes the sprayed droplets to settle at the bottom of the collection chamber 12, forming a droplet wall that intercepts and absorbs the ammonia-containing gas. Preferably, [reference needed]. Figure 2 Alternatively, the spray pipe 42 can be arranged in a ring, and the nozzles 43 can be evenly distributed on the ring spray pipe 42. This allows the absorbent liquid to be sprayed towards the center of the collection chamber 12 from all directions of a cross section of the collection chamber 12, forming a denser droplet wall to intercept ammonia-containing gas and improve the absorption effect of ammonia.

[0087] More preferably, different numbers of spray pipes 42 and nozzles 43 can be set at different cross sections of the collection chamber 12 to form droplet walls of different densities, so as to further improve the absorption efficiency of ammonia.

[0088] Optionally, refer to Figure 1 A demister 8 is provided in the venting chamber 13. The demister 8 removes the droplets in the venting chamber 13 from the gas after ammonia removal, which can prevent ammonia gas from being discharged through the venting chamber 13 along with the droplets of the absorbent liquid.

[0089] In a preferred embodiment, both the drain pipe 61 and the overflow pipe 64 are equipped with U-shaped water collectors, which can form a closed liquid column in the U-shaped water collectors, preventing gas exchange between the receiving cavity 31 and the collecting cavity 12.

[0090] In relation to the ammonia absorption apparatus of any of the above embodiments, this application also provides an ammonia absorption method, comprising:

[0091] S101. Introduce ammonia-containing gas into the vent pipe 1 so that the ammonia-containing gas is released from the inlet chamber 11 of the vent pipe 1 into the collection chamber 12;

[0092] S102. The ammonia concentration in the air inlet chamber 11 of the vent pipe 1 is detected by the ammonia sensor 21.

[0093] S103. When the ammonia concentration reaches the specified threshold, the circulation pump 5 is started so that the absorbent in the containment chamber 31 of the liquid tank 3 enters the spray assembly 4, flows from the delivery pipe 41 through the spray pipe 42 to the nozzle 43, and is sprayed into the collection chamber 12 of the vent pipe 1 to dissipate the ammonia.

[0094] S104. The absorbent liquid located at the bottom of the collection chamber 12 is discharged into the receiving chamber 31 through the discharge pipe 61;

[0095] S105. Release the gas after ammonia removal from the vent chamber 13.

[0096] The ammonia absorption device in this embodiment can have the same structure and achieve the same effect as the ammonia absorption device in the above embodiment, and will not be described again in this embodiment.

[0097] In this embodiment, when the ammonia concentration in the air inlet chamber 11 does not reach the specified threshold, it indicates that the ammonia-containing gas discharged into the atmosphere can dissipate directly without causing harm to the human body. Even if the absorbent liquid is sprayed, it is difficult to further reduce the ammonia concentration. Therefore, the circulation pump 5 does not need to be driven to spray the absorbent liquid. The circulation pump 5 is only activated to spray the absorbent liquid when the ammonia concentration reaches the specified threshold, which allows the absorbent liquid in droplet form to fully contact and absorb the ammonia in a timely manner. When the absorbent liquid droplets that have absorbed the ammonia settle to the bottom of the collection chamber 12 under the action of gravity, they are discharged through the drain pipe 61 and flow back into the receiving chamber 31 of the liquid tank 3. Subsequently, they can be sucked back into the spray pipe 42 by the circulation pump 5 and sprayed back into the collection chamber 12 by the nozzle 43, thereby improving the utilization rate of the absorbent liquid.

[0098] Therefore, the ammonia absorption method of this application absorbs ammonia gas using an absorbent in the form of droplets, allowing the gas to be discharged from the vent chamber 13 of the vent pipe 1 after ammonia removal. This reduces the direct emission of ammonia gas, thereby preventing crew members from accidentally inhaling it and endangering their lives. Moreover, the absorbent after absorbing ammonia gas can be recycled, improving the utilization rate of ammonia gas and saving resources for the environment.

[0099] Furthermore, the ammonia absorption method of this application also includes:

[0100] The air pressure value in the receiving cavity 31 is detected by the air pressure sensor 74;

[0101] When the air pressure value is lower than the first air pressure threshold, it indicates that the air pressure in the receiving chamber 31 is too low. The circulating pump 5 has difficulty drawing the absorbent liquid from the receiving chamber 31 into the spray pipe 42, which affects the amount of absorbent liquid sprayed. At this time, inert gas is injected into the receiving chamber 31 through the air filling pipe 72 of the air pressure balancing component 7, which can balance the air pressure of the receiving chamber 31 and the spray pipe 42.

[0102] When the air pressure reaches the second air pressure threshold, it indicates that the air pressure in the receiving cavity 31 and the air pressure in the spray pipe 42 have reached a state of equilibrium. At this time, the inflation of the inflation pipe 72 is suspended to prevent the air pressure in the receiving cavity 31 from continuing to rise.

[0103] When the gas pressure reaches the third gas pressure threshold, it indicates that the gas pressure in the receiving chamber 31 is too high. The absorbent liquid is prone to backflow from the drain pipe into the collecting chamber 12, which is detrimental to the discharge of the absorbent liquid that has absorbed ammonia from the collecting chamber 12. At this time, the safety valve 71 will automatically open, and the gas in the receiving chamber 31 will enter the collecting chamber 12 through the return gas pipe 73, maintaining a pressure balance between the receiving chamber 31 and the collecting chamber 12. Although the safety valve 71 can automatically open to release gas when the gas pressure in the receiving chamber 31 is too high in this embodiment, the gas pressure in the receiving chamber 31 can be accurately determined by combining the detection value of the gas pressure sensor 74, reducing the possibility of mistakenly believing that the safety valve 71 has malfunctioned.

[0104] Another preferred embodiment of the ammonia absorption method of this application further includes:

[0105] The ammonia concentration in the absorbent liquid in the containment cavity 31 is detected by the ammonia concentration sensor 23;

[0106] When the ammonia concentration reaches the first concentration threshold, it indicates that the ammonia concentration in the absorbent is too high and is close to the ammonia dissolution saturation limit, making it difficult to absorb any more ammonia. At this time, the solenoid valve 24 on the drain pipe 63 is opened to drain the absorbent that has absorbed ammonia from the receiving cavity 31 through the drain pipe 63, so that new absorbent that has not absorbed ammonia can be replaced.

[0107] As the absorbent is discharged from the receiving cavity 31, the liquid level in the receiving cavity 31 decreases. The first liquid level in the receiving cavity 31 is detected by the liquid level sensor 22.

[0108] When the first liquid level is lower than the first height threshold, it indicates that there is too little absorbent liquid in the container cavity. This triggers the opening of the solenoid valve 24 of the replenishment pipe 62, allowing unabsorbed ammonia absorbent liquid to be supplied to the receiving cavity 31 via the replenishment pipe 62. This ensures that the receiving cavity 31 is filled with absorbent liquid, preventing the circulating pump 5 from running dry and failing to supply absorbent liquid to the spray pipe 42. Furthermore, the unabsorbed ammonia absorbent liquid supplied by the replenishment pipe 62 also reduces the ammonia concentration in the absorbent liquid in the receiving cavity 31, restoring the absorbent liquid's efficiency in absorbing ammonia.

[0109] When the ammonia concentration is below the second concentration threshold, it indicates that the absorption efficiency of the absorbent has been restored, and the solenoid valve 24 of the drain pipe 63 can be closed, without the need to continue draining the absorbent.

[0110] When the first liquid level reaches the second height threshold, in order to avoid excessive replenishment of absorbent liquid, the solenoid valve 24 of the replenishment pipe 62 is triggered to stop the replenishment of absorbent liquid in time.

[0111] Specifically, the ammonia absorption method of this application also includes:

[0112] The second liquid level height in the collection chamber 12 is detected by the liquid level sensor 22;

[0113] When the second liquid level reaches the second height threshold, it indicates that there is too much absorbent in the collection chamber 12. Most of the absorbent in the receiving chamber 31 is sucked into the collection chamber 12 by the circulation pump 5. At this time, reducing the speed of the circulation pump 5 can reduce the amount of absorbent sprayed in the collection chamber 12, so that the absorbent in the collection chamber 12 can flow back to the receiving chamber 31 through the drain pipe 61.

[0114] In addition, this application also provides another absorption method, including:

[0115] S201. Introduce ammonia-containing gas into the vent pipe 1 so that the ammonia-containing gas is released from the inlet chamber 11 of the vent pipe 1 into the collection chamber 12;

[0116] S202, The ammonia concentration in the air inlet chamber 11 of the vent pipe 1 is detected by the ammonia sensor 21;

[0117] S203. When the ammonia concentration reaches the specified threshold, the circulation pump 5 is started so that the absorbent in the containment chamber 31 of the liquid tank 3 enters the spray assembly 4, flows from the delivery pipe 41 through the spray pipe 42 to the nozzle 43, and is sprayed into the collection chamber 12 of the vent pipe 1 to dissipate the ammonia.

[0118] S204. The absorbent liquid located at the bottom of the collection chamber 12 is discharged into the receiving chamber 31 through the drain pipe 61;

[0119] S205. Release the gas after ammonia removal from the vent chamber 13;

[0120] S206. The air pressure value in the receiving cavity 31 is detected by the air pressure sensor 74;

[0121] S207. When the air pressure value is lower than the first air pressure threshold, inert gas is injected into the receiving cavity 31 through the air filling pipe 72 of the air pressure balance component 7.

[0122] S208. When the air pressure value reaches the second air pressure threshold, stop the inflation of the inflation tube 72.

[0123] S209. When the air pressure reaches the third air pressure threshold, the safety valve 71 opens, and the gas in the receiving chamber 31 enters the collecting chamber 12 from the return pipe 73.

[0124] S210. The ammonia concentration of the absorbent in the containment cavity 31 is detected by the ammonia concentration sensor 23.

[0125] S211. When the ammonia concentration reaches the first concentration threshold, open the solenoid valve 24 on the drain pipe 63 to discharge the absorbent liquid that has absorbed ammonia from the receiving cavity 31.

[0126] S212. When the ammonia concentration is lower than the second concentration threshold, close the solenoid valve 24 on the drain pipe 63.

[0127] S213. The first liquid level height in the receiving cavity 31 is detected by the liquid level sensor 22;

[0128] S214. When the first liquid level is lower than the first height threshold, open the solenoid valve 24 of the replenishment pipe 62 and input the unabsorbed ammonia absorbent into the receiving cavity 31 through the replenishment pipe 62.

[0129] S215. When the first liquid level reaches the second height threshold, close the solenoid valve 24 of the replenishment pipe 62.

[0130] S216. Detect the second liquid level height in the collection chamber 12 using the liquid level sensor 22;

[0131] S217. When the second liquid level reaches the second height threshold, reduce the speed of the circulating pump 5.

[0132] The ammonia absorption method in this embodiment has the same steps and achieves the same effect as the ammonia absorption method in the above embodiment, and will not be described again in this embodiment.

[0133] In the description herein, it should be understood that the terms "upper," "lower," "left," "right," and other orientations or positional relationships are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used merely for descriptive distinction and have no special meaning.

[0134] In the description of this specification, references to terms such as "an embodiment," "example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example.

[0135] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style of the specification is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0136] The technical principles of this application have been described above with reference to specific embodiments. These descriptions are merely for explaining the principles of this application and should not be construed as limiting the scope of protection of this application in any way. Based on this explanation, those skilled in the art can readily conceive of other specific embodiments of this application without inventive effort, and these embodiments will all fall within the scope of protection of this application.

Claims

1. An ammonia absorption device, characterized in that, include: The vent pipe (1) has an air inlet chamber (11), a collection chamber (12) and a vent chamber (13) connected in sequence, wherein the air inlet chamber (11) is used to release ammonia-containing gas into the collection chamber (12); An ammonia sensor (21) is disposed in the air inlet chamber (11) for detecting the ammonia concentration in the air inlet chamber (11); The liquid tank (3) has a receiving cavity (31) for holding the absorbent liquid; The spray assembly (4) includes an infusion tube (41), a spray tube (42), and a nozzle (43). The two ends of the infusion tube (41) are respectively connected to the receiving cavity (31) and the spray tube (42). The spray tube (42) is provided with a plurality of nozzles (43). The nozzles (43) are inserted into the collection cavity (12). The infusion tube (41) is used to input the absorbent into the spray tube (42) so that the absorbent sprayed by the nozzles (43) absorbs the ammonia in the collection cavity (12). A circulation pump (5) is installed on the infusion tube (41) to drive the absorbent in the receiving cavity (31) into the infusion tube (41); The drain pipe (61) is connected at both ends to the bottom of the collection chamber (12) and the receiving chamber (31), respectively. The drain pipe (61) is used to discharge the absorbent liquid located at the bottom of the collection chamber (12) to the receiving chamber (31) so that the gas after ammonia removal is released from the venting chamber (13). The pressure balancing assembly (7) includes a safety valve (71) and an inflation pipe (72) and a return pipe (73) respectively connected to the receiving cavity (31). The safety valve (71) is disposed in the return pipe (73). The inflation pipe (72) is used to input inert gas, and the return pipe (73) is used to discharge the gas in the receiving cavity (31) to the collecting cavity (12).

2. The ammonia absorption device according to claim 1, characterized in that, Also includes: A replenishment tube (62) is connected to the receiving cavity (31), and the replenishment tube (62) is used to input the absorbent liquid that has not absorbed ammonia; A drain pipe (63) is connected to the bottom of the receiving cavity (31) and is used to drain the absorbent liquid that has absorbed ammonia.

3. The ammonia absorption device according to claim 2, characterized in that, The ammonia sensor (21) is installed in the venting chamber (13), and the ammonia absorption device further includes: A liquid level sensor (22) is disposed in the receiving cavity (31) and / or the collecting cavity (12) for detecting the liquid level height in the receiving cavity (31) and / or the collecting cavity (12); An ammonia concentration sensor (23) is disposed in the containment cavity (31) for detecting the ammonia concentration of the absorption liquid; Solenoid valves (24) are respectively installed in the replenishment pipe (62) and the drain pipe (63).

4. The ammonia absorption device according to any one of claims 1 to 3, characterized in that, The vent pipe (1) includes a release pipe (101) and a collection pipe (102). The air inlet chamber (11) is located in the release pipe (101). The release pipe (101) has a release hole (100) for releasing ammonia-containing gas. The collection pipe (102) has a collection chamber (12) and a vent pipe (13) arranged in sequence. The release hole (100) is connected to the collection chamber (12).

5. The ammonia absorption device according to claim 4, characterized in that, Also includes: An overflow pipe (64) is connected at both ends to the collection chamber (12) and the receiving chamber (31), respectively. The height of the opening of the overflow pipe (64) connected to the collection chamber (12) is lower than the height of the air inlet chamber (11) connected to the release hole (100).

6. An ammonia absorption method, applied to the ammonia absorption apparatus according to any one of claims 1-5, characterized in that, include: Ammonia-containing gas is introduced into the vent pipe (1) so that the ammonia-containing gas is released from the air inlet chamber (11) of the vent pipe (1) into the collection chamber (12); The ammonia concentration in the air inlet chamber (11) of the vent pipe (1) is detected by the ammonia sensor (21); When the ammonia concentration reaches a specified threshold, the circulation pump (5) is started so that the absorbent in the containment chamber (31) of the liquid tank (3) enters the spray assembly (4), flows from the infusion pipe (41) through the spray pipe (42) to the nozzle (43), and is sprayed into the collection chamber (12) of the vent pipe (1) to dissipate the ammonia. The absorbent liquid located at the bottom of the collection chamber (12) is discharged into the receiving chamber (31) through the drain pipe (61); The gas after ammonia removal is released from the venting chamber (13).

7. The ammonia absorption method according to claim 6, characterized in that, Also includes: The air pressure value in the receiving cavity (31) is detected by the air pressure sensor (74); When the air pressure value is lower than the first air pressure threshold, inert gas is injected into the receiving cavity (31) through the air filling pipe (72) of the air pressure balancing component (7); When the air pressure value reaches the second air pressure threshold, the inflation of the inflation tube (72) is suspended; When the air pressure value reaches the third air pressure threshold, the safety valve (71) opens, and the gas in the receiving chamber (31) enters the collecting chamber (12) from the return air pipe (73).

8. The ammonia absorption method according to claim 6, characterized in that, Also includes: The ammonia concentration of the absorbent in the containment cavity (31) is detected by the ammonia concentration sensor (23); When the ammonia concentration reaches the first concentration threshold, the solenoid valve (24) on the drain pipe (63) is opened to discharge the absorbent liquid that has absorbed ammonia in the containment cavity (31); When the ammonia concentration is lower than the second concentration threshold, the solenoid valve (24) on the drain pipe (63) is closed; The first liquid level height in the receiving cavity (31) is detected by the liquid level sensor (22); When the first liquid level is lower than the first height threshold, the solenoid valve (24) of the replenishment pipe (62) is opened, and the absorbent liquid that has not absorbed ammonia is input into the containment cavity (31) through the replenishment pipe (62); When the first liquid level reaches the second height threshold, the solenoid valve (24) of the replenishment pipe (62) is closed.

9. The ammonia absorption method according to claim 6, characterized in that, Also includes: The second liquid level height in the collection chamber (12) is detected by the liquid level sensor (22); When the second liquid level reaches the second height threshold, the speed of the circulating pump (5) is reduced.

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