Ammonia gas absorption device for ammonia water storage tank
By using a multi-layer ammonia absorption structure with an insulated gas guide plate and a fan-shaped gas distribution plate in the ammonia storage tank, combined with an activated carbon layer and a heat dissipation shell design, the problems of high cost, power consumption and environmental pollution of existing ammonia absorption devices are solved, and efficient and low-cost ammonia absorption is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHANDONG GUOSHUN CONSTR GRP
- Filing Date
- 2025-04-30
- Publication Date
- 2026-05-01
AI Technical Summary
Existing ammonia absorption devices are costly, require electricity, have low absorption rates, and are prone to causing environmental pollution. Ammonia absorption is incomplete, and ammonia is prone to leakage, especially during the ammonia unloading process.
Multiple heat-insulating gas guide plates and fan-shaped gas distribution plates are used to form an internal multi-layer ammonia absorption structure, which increases the contact area and residence time between gas and water. Residual ammonia is adsorbed by an activated carbon layer, and the outer shell of the device adopts a heat dissipation plate design.
It improves the absorption efficiency of ammonia, reduces manufacturing costs, reduces energy consumption, reduces environmental pollution, and ensures high ammonia absorption rate and low concentration of emitted gas.
Smart Images
Figure CN224180594U_ABST
Abstract
Description
An ammonia absorption device for ammonia storage tank Technical Field
[0001] This utility model relates to the field of flue gas denitrification technology, specifically to an ammonia absorption device for ammonia storage tanks. Background Technology
[0002] Acid rain is one of the three major environmental hazards globally, primarily caused by the large-scale combustion of high-sulfur coal. The scope and severity of acid rain pollution have attracted close attention, and ultra-low emission and flue gas treatment during coal combustion have become environmental hotspots in recent years. SNCR (Selective Non-Catalytic Reduction) denitrification is an end-of-pipe treatment technology for NOx in flue gas. It involves uniformly injecting an ammonia-containing reducing agent into a boiler temperature range of 850℃–1250℃ without the use of a catalyst, selectively reducing NOx in the flue gas to N2 and H2O, thereby achieving NOx emission reduction. Ammonia is a necessary reducing agent, and its demand is relatively large.
[0003] As is well known, ammonia is a colorless gas with a strong, pungent odor and a density less than air. It is commonly used in the production of liquid nitrogen, ammonia water, nitric acid, ammonium salts, and amines. Ammonia can burn the skin, eyes, and mucous membranes of the respiratory organs. Inhaling too much can cause lung swelling and even death. Ammonia water is frequently used in industrial production and is often stored in ammonia water storage tanks. During ammonia unloading, the pressure inside the ammonia water storage tank increases. To ensure equipment safety, a breather valve on the top of the tank must be used to release some of the gas inside. This released gas contains a certain concentration of ammonia. Current technology typically connects the exhaust pipe below the liquid level in a wastewater pit to dissolve the ammonia in the water and prevent leakage. This method requires a certain liquid level in the wastewater pit. Due to poor sealing of the wastewater pit, ammonia gas entering the pit forms a dilute ammonia solution, which easily releases the ammonia odor into the surrounding environment, causing adverse environmental impacts.
[0004] Furthermore, the ammonia unloading process is characterized by a short-term large exhaust volume. Since ammonia releases a significant amount of heat when dissolving in water, this short-term large exhaust volume, combined with water dissolution, raises the temperature, reducing the solubility of ammonia in water and resulting in poor overall absorption. Existing ammonia absorption devices mostly consist of multiple structural units, including spray units, circulating pumps, heat exchange pumps, solenoid valves, and monitoring units. This results in high costs and requires electricity to improve absorption efficiency, leading to unnecessary energy waste. Additionally, while spraying ammonia into water can improve absorption, some ammonia may still escape through the spray zone and be discharged via the exhaust pipe, resulting in incomplete absorption.
[0005] Therefore, how to design and provide an ammonia absorption device that is simple and durable in structure, low in manufacturing cost, requires no electricity, has a high absorption rate, and causes little environmental pollution is a technical problem that urgently needs to be solved in the field of flue gas denitrification technology. Summary of the Invention
[0006] To address the problems existing in the prior art, this utility model provides an ammonia absorption device for ammonia storage tanks. By setting multiple heat-insulating gas guide plates in conjunction with a fan-shaped gas distribution plate to form an internal multi-layer ammonia absorption structure, it can effectively prevent the problem of reduced ammonia solubility caused by mutual heating of water between layers during gas ascent. It also increases the flow path of gas inside the device, thereby increasing the contact area between gas and water. At the same time, the staggered arrangement of the gas outlets between layers further increases the residence time of gas inside the device, greatly improving the ammonia absorption efficiency. The overall structure of the device is simple and durable, with low manufacturing cost, no need to consume electricity, high ammonia absorption rate, and low environmental pollution.
[0007] The technical solution of this utility model is as follows:
[0008] In a first aspect of this utility model, an ammonia absorption device for an ammonia storage tank is provided, comprising a device body, an inlet pipe inside the device body extending vertically to the bottom of the device body, a gas distribution plate near the bottom of the inlet pipe, a porous structure on the top of the gas distribution plate, a first heat-insulating gas guide plate above the gas distribution plate, a first partition plate above the first heat-insulating gas guide plate, and a first fan-shaped gas distribution plate on the first partition plate.
[0009] A second heat-insulating gas guide plate is provided above the first partition, a second partition is provided above the second heat-insulating gas guide plate, and a second fan-shaped gas distribution plate is provided on the second partition.
[0010] A gas adsorption structure is provided above the second partition.
[0011] In some embodiments of this utility model, the gas adsorption structure is configured as an activated carbon layer, and the periphery of the activated carbon layer is in contact with the inner wall of the device body.
[0012] In some embodiments of this utility model, the top of the device body is provided with an air inlet, which is connected to an air inlet pipe; the top of the device body is also provided with an exhaust port.
[0013] In some embodiments of this utility model, the device body contains a dissolving liquid, and the liquid level of the dissolving liquid is lower than that of the gas adsorption structure.
[0014] In some embodiments of this utility model, the air intake pipe passes vertically through the gas adsorption structure, the second partition, the second heat-insulating gas guide plate, the first partition, and the first heat-insulating gas guide plate, extending to the bottom of the device body. A sealing structure is provided at the contact position between the air intake pipe and the second partition, the second heat-insulating gas guide plate, the first partition, and the first heat-insulating gas guide plate.
[0015] In some embodiments of this utility model, the device body is configured as a hollow cylindrical structure, and the air intake pipe is located at the central axis of the cylindrical structure; the periphery of the first partition and the second partition are both in contact with the inner wall of the device body.
[0016] In some embodiments of this utility model, one end of the first heat-insulating gas guide plate is connected to the inner wall of the device body, and the other end is tilted upward at a set angle and spaced apart from the inner wall of the device body at a set distance to form a first opening structure; one end of the second heat-insulating gas guide plate is connected to the inner wall of the device body, and the other end is tilted upward at a set angle and spaced apart from the inner wall of the device body at a set distance to form a second opening structure.
[0017] In some embodiments of this utility model, the position of the first opening structure and the position of the first fan-shaped air distribution plate are symmetrically arranged according to the air intake pipe.
[0018] In some embodiments of this utility model, the position of the second opening structure and the position of the second fan-shaped air distribution plate are symmetrically arranged according to the air intake pipe.
[0019] In some embodiments of this utility model, a water pipe is provided on the bottom outer side of the device body, and a shut-off valve is provided on the water pipe.
[0020] One or more technical solutions of this utility model have the following beneficial effects:
[0021] This utility model provides an ammonia absorption device for ammonia storage tank. By setting multiple heat-insulating gas guide plates in conjunction with a fan-shaped gas distribution plate to form an internal multi-layer ammonia absorption structure, it can effectively prevent the problem of reduced ammonia solubility caused by mutual heating of water between layers during gas ascent. It also increases the flow path of gas inside the device, thereby increasing the contact area between gas and water. At the same time, the staggered arrangement of the gas outlets between layers further increases the residence time of gas inside the device, greatly improving the ammonia absorption efficiency. The overall structure of the device is simple and durable, with low manufacturing cost, no need to consume electricity, high ammonia absorption rate, and low environmental pollution.
[0022] Since the process of ammonia dissolving in water is exothermic, and the ammonia produced by external ammonia unloading has the characteristics of large quantity in a short time, the first heat-insulating gas guide plate, the first fan-shaped gas distribution plate, the second heat-insulating gas guide plate and the second fan-shaped gas distribution plate in this device are all made of heat-insulating material to prevent the water between each layer from heating each other during the gas rising process, which would reduce the solubility of ammonia.
[0023] Meanwhile, the outer casing of the device is made of a heat sink, which can ensure effective heat dissipation to the surroundings;
[0024] Furthermore, the gas distribution plate, the first sector-shaped gas distribution plate, and the second sector-shaped gas distribution plate disperse ammonia bubbles, increasing the contact area between the gas and water, thus allowing for more complete absorption of ammonia.
[0025] In addition, the device uses a first heat-insulating gas guide plate and a second heat-insulating gas guide plate to guide the gas. The gas outlets between each layer are arranged alternately from left to right, which can increase the residence time of the gas in the device and increase the ammonia absorption efficiency.
[0026] Finally, a small amount of residual unabsorbed ammonia is absorbed by the activated carbon layer, ensuring that the ammonia concentration and odor in the exhaust gas are low, thus achieving efficient adsorption of the gas. Attached Figure Description
[0027] Figure 1 is a schematic diagram of the internal overall structure of an ammonia absorption device for an ammonia storage tank provided in Embodiment 1 of this utility model;
[0028] Figure 2 is a cross-sectional view of section AA in Figure 1 provided in Embodiment 1 of this utility model;
[0029] Figure 3 is a cross-sectional view of section BB in Figure 1 provided in Embodiment 1 of this utility model;
[0030] Figure 4 is a cross-sectional view at CC in Figure 1 provided in Embodiment 1 of this utility model;
[0031] Figure 5 is a cross-sectional view of DD in Figure 1 provided in Embodiment 1 of this utility model;
[0032] Figure 6 is a cross-sectional view of EE in Figure 1 provided in Embodiment 1 of this utility model.
[0033] In the diagram: 1. Air inlet; 2. Air inlet pipe; 3. Air distribution plate; 4. First heat-insulating gas guide plate; 5. First fan-shaped air distribution plate; 6. Second heat-insulating gas guide plate; 7. Second fan-shaped air distribution plate; 8. Activated carbon layer; 9. Air outlet pipe; 10. Air outlet; 11. Shut-off valve; 12. Water outlet; 13. Heat dissipation shell. Detailed Implementation
[0034] The present invention will be further described below with reference to the accompanying drawings and embodiments.
[0035] Example 1
[0036] In a typical embodiment of this utility model, an ammonia absorption device for an ammonia storage tank is proposed. By setting multiple heat-insulating gas guide plates in conjunction with a fan-shaped gas distribution plate 3 to form an internal multi-layer ammonia absorption structure, the problem of reduced ammonia solubility caused by mutual heating of water between layers during gas ascent can be effectively prevented. Furthermore, the flow path of gas inside the device is increased, thereby increasing the contact area between gas and water. At the same time, the gas outlets between each layer are arranged alternately, further increasing the residence time of gas inside the device, which greatly improves the ammonia absorption efficiency. The overall structure of the device is simple and durable, with low manufacturing cost, no need to consume electricity, high ammonia absorption rate, and low environmental pollution.
[0037] The technical solution of this utility model is as follows:
[0038] In a first aspect of this utility model, an ammonia absorption device for an ammonia storage tank is provided, comprising a device body, an inlet pipe 2 inside the device body, the inlet pipe 2 extending vertically to the bottom of the device body, an air distribution plate 3 near the bottom of the inlet pipe 2, a porous structure on the top of the air distribution plate 3, a first heat-insulating gas guide plate 4 above the air distribution plate 3, a first partition plate above the first heat-insulating gas guide plate 4, and a first fan-shaped air distribution plate 5 on the first partition plate.
[0039] A second heat-insulating gas guide plate 6 is provided above the first partition, a second partition is provided above the second heat-insulating gas guide plate 6, and a second fan-shaped gas distribution plate 7 is provided on the second partition.
[0040] A gas adsorption structure is provided above the second partition.
[0041] In this embodiment, the outer casing of the device body is provided with a heat dissipation casing 13 for heat dissipation during gas processing.
[0042] Furthermore, the gas adsorption structure is configured as an activated carbon layer 8, with the periphery of the activated carbon layer 8 in contact with the inner wall of the device body.
[0043] Furthermore, the top of the device body is provided with an air inlet 1, which is connected to an air inlet pipe 2; the top of the device body is also provided with an air outlet 10. In this embodiment, the top of the device body is provided with an exhaust pipe 9, which is connected to the air outlet 10.
[0044] Furthermore, the device body contains a dissolving liquid, the liquid level of which is lower than that of the gas adsorption structure.
[0045] Furthermore, the intake pipe 2 passes through the gas adsorption structure, the second partition, the second heat-insulating gas guide plate 6, the first partition, and the first heat-insulating gas guide plate 4 in a vertical direction and extends to the bottom of the device body. A sealing structure is provided at the contact position between the intake pipe 2 and the second partition, the second heat-insulating gas guide plate 6, the first partition, and the first heat-insulating gas guide plate 4.
[0046] Furthermore, the device body is configured as a hollow cylindrical structure, and the air intake pipe 2 is located at the central axis of the cylindrical structure; the periphery of the first partition and the second partition are both in contact with the inner wall of the device body.
[0047] Furthermore, one end of the first heat-insulating gas guide plate 4 is connected to the inner wall of the device body, and the other end is tilted upward at a set angle and spaced at a set distance from the inner wall of the device body to form a first opening structure; one end of the second heat-insulating gas guide plate 6 is connected to the inner wall of the device body, and the other end is tilted upward at a set angle and spaced at a set distance from the inner wall of the device body to form a second opening structure.
[0048] Furthermore, the position of the first opening structure is symmetrically set with respect to the position of the first fan-shaped air distribution plate 5 according to the air intake pipe; the position of the second opening structure is symmetrically set with respect to the position of the second fan-shaped air distribution plate 7 according to the air intake pipe.
[0049] Furthermore, an outlet 12 is provided on the outer bottom of the device body, and a shut-off valve 11 is provided on the outlet 12.
[0050] In this embodiment, the device body is cylindrical with a diameter of 1.00m and a height of 1.20m;
[0051] The first sector-shaped air distribution plate 5 and the second sector-shaped air distribution plate 7 are respectively installed at heights of 0.40m and 0.80m inside the main body of the device;
[0052] The left end of the first heat-insulating gas guide plate 4 is set at a height of 0.15m inside the device body, and the right side is tilted upward and set at a certain distance from the inner wall of the device body, with the right side at a height of 0.30m inside the device body.
[0053] The left end of the second heat-insulating gas guide plate 6 is set at a height of 0.55m inside the device body, and the right end is set at a certain distance from the inner wall of the device body, with the height of the right end being 0.70m inside the device body.
[0054] The thickness of the activated carbon layer 8 is 0.10m. The lower layer of the activated carbon layer 8 is set at a height of 1.00m inside the device body, and the upper layer is set at a height of 1.10m inside the device body.
[0055] The air intake pipe 2 is located at the central axis of the device body, extending underwater to 0.05m, and the diameter of the air intake pipe 2 is 0.06m;
[0056] The thickness of the air distribution plate 3 connected to the air intake pipe 2 is 0.02m. The bottom surface of the air distribution plate 3 is set at a height of 0.03m inside the device body, and the periphery of the air distribution plate 3 is 0.06m away from the inner wall of the device body.
[0057] The air inlet 1 and the air outlet are positioned 0.13m above the device.
[0058] The water level of the solution is set at a height of 0.91m, and the solution is ammonia.
[0059] The opening angle of the sector-shaped portion in the first sector-shaped air distribution plate 5 and the second sector-shaped air distribution plate 7 is 90°.
[0060] After one or more ammonia discharges, open shut-off valve 11 to collect and recover the ammonia water; then add water back to the original water level.
[0061] In a second aspect of this utility model, a method of using an ammonia absorption device for an ammonia storage tank is provided, comprising:
[0062] First, the dissolving liquid is supplied into the device body through the outlet 12, and the height of the supplied dissolving liquid is lower than that of the gas adsorption structure.
[0063] Connect the air inlet 1 to the target processing gas;
[0064] The target gas is introduced into the gas distribution plate 3 through the inlet pipe and then discharged along the top of the gas distribution plate 3. After being guided by the first heat-insulating gas guide plate 4, it flows upward along the first opening structure. After being blocked by the first baffle, it flows upward through the first fan-shaped gas distribution plate 5. After being guided by the second heat-insulating gas guide plate 6, it flows upward along the second opening structure. After being blocked by the second baffle, it flows upward through the second fan-shaped gas distribution plate 7. After being adsorbed by the gas adsorption structure, it is discharged from the outlet 10.
[0065] This utility model provides an ammonia absorption device for ammonia storage tank. By setting multiple heat-insulating gas guide plates in conjunction with a fan-shaped gas distribution plate 3 to form an internal multi-layer ammonia absorption structure, it can effectively prevent the problem of reduced ammonia solubility caused by mutual heating of water between layers during gas ascent. It also increases the flow path of gas inside the device, thereby increasing the contact area between gas and water. At the same time, the gas outlets between each layer are arranged alternately, further increasing the residence time of gas inside the device, which greatly improves the ammonia absorption efficiency. The overall structure of the device is simple and durable, with low manufacturing cost, no need to consume electricity, high ammonia absorption rate, and low environmental pollution.
[0066] Since the process of ammonia dissolving in water is exothermic, and the ammonia produced by external ammonia unloading has the characteristics of large quantity in a short time, the first heat-insulating gas guide plate 4, the first fan-shaped gas distribution plate 5, the second heat-insulating gas guide plate 6 and the second fan-shaped gas distribution plate 7 in this device are all made of heat-insulating material to prevent the water between each layer from heating each other during the gas rising process, which would reduce the solubility of ammonia.
[0067] Meanwhile, the outer casing of the device is made of a heat sink, forming a heat sink casing 13, which can ensure effective heat dissipation to the surroundings;
[0068] Furthermore, the gas distribution plate 3, the first sector-shaped gas distribution plate 5, and the second sector-shaped gas distribution plate 7 disperse the ammonia gas bubbles, increasing the contact area between the gas and water, thus allowing the ammonia gas to be absorbed more fully.
[0069] In addition, the device uses a first heat-insulating gas guide plate 4 and a second heat-insulating gas guide plate 6 to guide the gas. The gas outlets between each layer are arranged alternately from left to right, which can increase the residence time of the gas in the device and increase the ammonia absorption efficiency.
[0070] Finally, a small amount of residual unabsorbed ammonia gas is absorbed by the activated carbon layer 8, ensuring that the ammonia concentration and odor of the gas discharged from the device are low, thus achieving efficient adsorption of the gas.
[0071] Although the specific embodiments of the present utility model have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present utility model. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solution of the present utility model are still within the scope of protection of the present utility model.
Claims
1. An ammonia absorption device for an ammonia storage tank, characterized in that, The device includes a main body, inside which is an air inlet pipe extending vertically to the bottom of the main body. Near the bottom of the main body, an air distribution plate is located on the air inlet pipe. The top of the air distribution plate has a porous structure. Above the air distribution plate is a first heat-insulating gas guide plate, above which is a first partition plate, and on which is a first fan-shaped air distribution plate. Above the first partition plate is a second heat-insulating gas guide plate, above which is a second partition plate, and on which is a second fan-shaped air distribution plate. Above the second partition plate is a gas adsorption structure.
2. The ammonia absorption device for an ammonia storage tank as described in claim 1, characterized in that, The gas adsorption structure is configured as an activated carbon layer, and the periphery of the activated carbon layer is in contact with the inner wall of the device body.
3. The ammonia absorption device for an ammonia storage tank as described in claim 1, characterized in that, The top of the device body is provided with an air inlet, which is connected to an air intake pipe; the top of the device body is also provided with an exhaust port.
4. The ammonia absorption device for an ammonia storage tank as described in claim 1, characterized in that, The device body contains a dissolving liquid, and the liquid level of the dissolving liquid is lower than that of the gas adsorption structure.
5. An ammonia absorption device for an ammonia storage tank as described in claim 1, characterized in that, The air intake pipe passes vertically through the gas adsorption structure, the second partition, the second heat-insulating gas guide plate, the first partition, and the first heat-insulating gas guide plate, extending to the bottom of the device body. A sealing structure is provided at the contact position between the air intake pipe and the second partition, the second heat-insulating gas guide plate, the first partition, and the first heat-insulating gas guide plate.
6. An ammonia absorption device for an ammonia storage tank as described in claim 1, characterized in that, The device body is configured as a hollow cylindrical structure, and the air intake pipe is located at the central axis of the cylindrical structure; the periphery of the first partition and the second partition are both in contact with the inner wall of the device body.
7. An ammonia absorption device for an ammonia storage tank as described in claim 6, characterized in that, One end of the first heat-insulating gas guide plate is connected to the inner wall of the device body, and the other end is tilted upward at a set angle and spaced at a set distance from the inner wall of the device body to form a first opening structure; one end of the second heat-insulating gas guide plate is connected to the inner wall of the device body, and the other end is tilted upward at a set angle and spaced at a set distance from the inner wall of the device body to form a second opening structure.
8. An ammonia absorption device for an ammonia storage tank as described in claim 7, characterized in that, The position of the first opening structure and the position of the first fan-shaped air distribution plate are symmetrically set according to the air intake pipeline.
9. An ammonia absorption device for an ammonia storage tank as described in claim 7, characterized in that, The position of the second opening structure and the position of the second fan-shaped air distribution plate are symmetrically set according to the air intake pipeline.
10. An ammonia absorption device for an ammonia storage tank as described in claim 1, characterized in that, A water pipe is provided on the bottom outer side of the device body, and a shut-off valve is provided on the water pipe.