A high-efficiency ammonia gas absorption device placed on the top of an ammonia water storage tank
By designing an ammonia absorption device with an inner and outer cylinder structure at the top of the ammonia storage tank, the inner cylinder performs primary absorption and the outer cylinder performs secondary absorption, thus solving the problem of high cost of existing devices and achieving efficient ammonia absorption and low-cost operation.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- BEIJING CYBERSPACE TECH DEV CO LTD
- Filing Date
- 2025-07-07
- Publication Date
- 2026-06-16
AI Technical Summary
Existing ammonia absorption devices require continuous spraying and large amounts of absorbent, resulting in high investment and operating costs, and the volatilization of ammonia is difficult to control effectively.
Design a high-efficiency ammonia absorption device placed on top of an ammonia storage tank. It adopts an inner and outer cylinder structure, with the inner cylinder performing primary absorption and the outer cylinder performing secondary absorption. It uses an aqueous solution to absorb ammonia and improves absorption efficiency through a heat exchange channel. The dilute ammonia solution is returned to the storage tank for reuse.
It achieves highly efficient ammonia absorption without the need for power equipment, reduces investment and operating costs, minimizes ammonia leakage, requires a small footprint, and is environmentally friendly.
Smart Images
Figure CN224358231U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of ammonia volatilization recovery technology for ammonia storage tanks, specifically to a high-efficiency ammonia absorption device placed on top of an ammonia storage tank. Background Technology
[0002] Currently, 20% ammonia solution is frequently used as a reducing agent in flue gas denitrification technology and as an absorbent in ammonia-based desulfurization technology. In both flue gas denitrification and ammonia-based desulfurization processes, ammonia solution is typically stored in ammonia storage tanks. However, because ammonia solution is volatile and readily converts into ammonia gas, especially during hot summer months when its volatility is even higher, an ammonia absorption device is required to absorb the ammonia gas volatilized from the storage tank.
[0003] Currently, the most common ammonia absorption device is the spray absorption tower. Ammonia is introduced into the tower, where it reacts with sprayed water or an alkaline solution (such as sodium hydroxide solution) to achieve absorption. This process requires continuous spraying and a large amount of absorbent, resulting in high investment and operating costs. Utility Model Content
[0004] To address the problems existing in the above-mentioned technologies, this utility model provides a high-efficiency ammonia absorption device placed on top of an ammonia storage tank.
[0005] The technical solution adopted by this utility model to achieve the above-mentioned technical effects is:
[0006] A high-efficiency ammonia absorption device placed on top of an ammonia storage tank includes an outer cylinder positioned on top of the tank and an inner cylinder located within the outer cylinder. The inner cylinder has a primary ammonia absorption chamber, and a secondary ammonia absorption chamber is formed between the outer cylinder and the inner cylinder. Both the primary and secondary absorption chambers store aqueous solutions for absorbing ammonia. The top of the inner cylinder is provided with an ammonia inlet pipe, a primary demineralized water inlet pipe, and a breather valve interface connected to the primary absorption chamber. The bottom of the primary absorption chamber is provided with a primary ammonia absorption chamber connected to the lower end of the ammonia inlet pipe. The primary absorption chamber has a connecting pipe at its top that communicates with the secondary absorption chamber, and a secondary ammonia gas dispersion pipe at its bottom that connects to the lower end of the connecting pipe. The inner cylinder has a primary vent pipe at its bottom that communicates with the primary absorption chamber. The outer cylinder has a secondary demineralized water inlet pipe and an exhaust port at its top that communicate with the secondary absorption chamber, and a secondary vent pipe at its bottom that communicates with the secondary absorption chamber. Valves are installed on the primary and secondary vent pipes and are connected to an ammonia storage tank.
[0007] Preferably, in the above-mentioned high-efficiency ammonia absorption device placed on top of the ammonia storage tank, an ammonia leak detector is provided above the breather valve interface.
[0008] Preferably, in the above-mentioned high-efficiency ammonia absorption device placed on top of the ammonia storage tank, the primary ammonia dispersion pipe is a circular annular pipe with several small holes on both sides of the sidewall.
[0009] Preferably, in the above-mentioned high-efficiency ammonia absorption device placed on top of the ammonia storage tank, the secondary ammonia dispersion pipe is a circular pipe with several small holes on both sides of the side wall.
[0010] Preferably, in the above-mentioned high-efficiency ammonia absorption device placed on top of the ammonia storage tank, the volumes of the primary absorption chamber and the secondary absorption chamber are relatively small, both being 0.5 m³. 3 about.
[0011] Preferably, in the above-mentioned high-efficiency ammonia absorption device placed on top of the ammonia storage tank, the inner cylinder is made of a heat-conducting material, and a heat exchange channel is established between the primary absorption chamber and the secondary absorption chamber.
[0012] Preferably, in the above-mentioned high-efficiency ammonia absorption device placed on top of the ammonia storage tank, the inner cylinder is made of stainless steel thermally conductive material.
[0013] Preferably, in the above-mentioned high-efficiency ammonia absorption device placed on top of the ammonia storage tank, the bottom of the outer cylinder is provided with a support, and the support is fixedly connected to the top of the ammonia storage tank.
[0014] Preferably, in the above-mentioned high-efficiency ammonia absorption device placed on top of the ammonia storage tank, the outer cylinder and the inner cylinder are respectively connected to a first transparent flange sight glass and a second transparent flange sight glass for observing the internal water level at positions near the top.
[0015] The advantages and positive effects of this utility model are: the ammonia absorption device of this utility model is placed on the top of the ammonia water storage tank, requiring no power equipment. The dilute ammonia water after absorbing ammonia can be returned to the ammonia water storage tank below for recycling. The entire absorption device has a reasonable structural design, small footprint, low operating cost, and high ammonia absorption efficiency. Through primary and secondary absorption, the volatilization and leakage of ammonia are reduced. Attached Figure Description
[0016] Figure 1 This is a structural diagram of the present invention;
[0017] Figure 2 for Figure 1 Cross-sectional view at "AA" in the middle. Detailed Implementation
[0018] To provide a further understanding of this utility model, the following description, with reference to the accompanying drawings and specific embodiments, will further illustrate the present utility model:
[0019] In the description of this utility model, it should be noted that the terms "vertical," "upper," "lower," and "horizontal," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this utility model and simplifying the description, 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. Therefore, they should not be construed as limitations on this utility model. In addition, "first," "second," "third," and "fourth" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.
[0020] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or a connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.
[0021] To further understand the invention content, features, and effects of this utility model, the following embodiments are provided in detail:
[0022] Please see Figure 1 and Figure 2 As shown in the figure, this utility model embodiment proposes a high-efficiency ammonia absorption device placed on top of an ammonia storage tank. The absorption device includes an outer cylinder 1 located on top of the ammonia storage tank and an inner cylinder 2 located within the outer cylinder 1. The inner cylinder 2 has a primary ammonia absorption chamber, and a secondary ammonia absorption chamber is formed between the outer cylinder 1 and the inner cylinder 2. Both the primary and secondary absorption chambers store aqueous solutions for absorbing ammonia. Specifically, the inner cylinder 2 is used for the primary absorption of volatile ammonia, and the outer cylinder 1 is used for the secondary absorption of volatile ammonia. That is, ammonia volatile from the ammonia storage tank first enters the inner cylinder 1, where it is absorbed by the aqueous solution to form low-concentration ammonia. After the inner cylinder 1 is saturated, excess volatile ammonia enters the outer cylinder 1 from the inner cylinder 2, where it is again absorbed by the aqueous solution to form low-concentration ammonia. Specifically, as... Figure 1 As shown, the top of the inner cylinder 2 is equipped with an ammonia inlet pipe 4, a primary demineralized water inlet pipe 5, and a breather valve interface 6, all connected to the primary absorption chamber. One end of the ammonia inlet pipe 4 is connected to the top of the ammonia storage tank, and the other end is connected to a primary ammonia dispersion pipe 7 located at the bottom of the primary absorption chamber. Ammonia gas volatilized from the ammonia storage tank is introduced into the primary absorption chamber through the ammonia inlet pipe 4 for absorption, and then the volatilized ammonia gas is evenly distributed into the aqueous solution in the inner cylinder 2 through the primary ammonia dispersion pipe 7. Figure 1As shown, the lower end of the ammonia inlet pipe 4 extends directly to the bottom of the primary absorption chamber and connects to the primary ammonia dispersion pipe 7. The primary demineralized water inlet pipe 5 is connected to the external water supply system via an inlet valve. After the low-concentration ammonia water saturated in the inner cylinder 2 is discharged to the ammonia water storage tank, the aqueous solution for ammonia absorption is replenished to the inner cylinder 2 through the primary demineralized water inlet pipe 5. The breather valve interface 6 is used to maintain the pressure balance of the inner cylinder 2. When the inner cylinder 2 and the outer cylinder 1 are saturated successively, the ammonia gas volatilized in the inner cylinder 2 increases to a certain pressure, which will cause the breather valve to activate, controlling the breather valve interface 6 to open to exhaust gas and generate an alarm signal.
[0023] like Figure 1 As shown, to allow excess ammonia gas that can no longer be effectively absorbed in the inner cylinder 2 to be discharged into the outer cylinder 1 for secondary absorption, a connecting pipe 8 is provided at the top of the primary absorption chamber, which is connected to the secondary absorption chamber. A secondary ammonia gas dispersion pipe 9, connected to the lower end of the connecting pipe 8, is provided at the bottom of the secondary absorption chamber. The volatile ammonia gas is then evenly introduced into the aqueous solution in the outer cylinder 1 through the secondary ammonia gas dispersion pipe 9. To facilitate the circulation and absorption of ammonia gas, a primary vent pipe 12, connected to the primary absorption chamber, is provided at the bottom of the inner cylinder 2, and a secondary vent pipe 13, connected to the secondary absorption chamber, is provided at the bottom of the outer cylinder 1. Valves are provided on both the primary vent pipe 12 and the secondary vent pipe 13, and they are connected to the ammonia water storage tank. When both the inner cylinder 2 and outer cylinder 1 are saturated, the ammonia gas volatilized in the inner cylinder 2 increases to a certain pressure, causing the breather valve on the breather valve interface 6 to open. Gas is released through the open breather valve interface 6, and the ammonia leak sensor detects this release signal, triggering an alarm to indicate that the absorption device has reached saturation. At this time, the solenoid valve on the primary vent pipe 12 opens, discharging the low-concentration ammonia water in the inner cylinder 2 into the ammonia water storage tank below for recycling. When the ammonia leak sensor triggers an alarm, it also simultaneously indicates that the outer cylinder 1 is saturated, and the solenoid valve on the secondary vent pipe 13 opens simultaneously, discharging the low-concentration ammonia water in the outer cylinder 1 into the ammonia water storage tank below for recycling. In this embodiment of the invention, the volumes of both the primary and secondary absorption chambers are relatively small, ensuring that the small amount of low-concentration ammonia water returning to the ammonia water storage tank does not significantly affect its concentration.
[0024] like Figure 1 As shown, the top of the outer cylinder 1 is equipped with a secondary demineralized water inlet pipe 10 and an exhaust port 11, which are connected to the secondary absorption chamber. The secondary demineralized water inlet pipe 10 is connected to an external water supply system through an inlet valve, and the exhaust port 11 is connected to sodium hydroxide absorbent to absorb the small amount of ammonia gas discharged after absorption saturation, preventing environmental pollution. When the low-concentration ammonia water in the outer cylinder 1 is drained, the solenoid valve on the secondary demineralized water inlet pipe 10 is opened, and the external water supply system connected to it starts pumping water to replenish the outer cylinder 1 with the aqueous solution for the next round of ammonia absorption.
[0025] Furthermore, in a preferred embodiment of this utility model, an ammonia leak detector is provided above the breathing valve interface 6. The ammonia leak detector detects ammonia and alarms, indicating that the inner cylinder 2 and outer cylinder 1 of the ammonia absorption device have been saturated.
[0026] Furthermore, in a preferred embodiment of this utility model, such as Figure 2 As shown, the primary ammonia dispersion tube 7 is a circular tube with several small holes on both sides of its sidewall. The secondary ammonia dispersion tube 9 is also a circular tube with several small holes on both sides of its sidewall. The circular primary and secondary ammonia dispersion tubes 7 and 9 facilitate the uniform distribution of ammonia in the primary and secondary absorption chambers, respectively, promoting faster absorption of ammonia.
[0027] In a preferred embodiment of this invention, the volumes of the primary absorption chamber and the secondary absorption chamber are relatively small, both set at 0.5m. 3 Left and right, with a positive and negative error not exceeding 0.05m 3 .
[0028] During the primary absorption of ammonia, the ammonia dissolves in water, generating heat. To facilitate better primary absorption of ammonia by the inner cylinder 2, the inner cylinder 2 is made of a heat-conducting material. A heat exchange channel is established between the primary and secondary absorption chambers, allowing for sufficient heat exchange between the heat released by the ammonia dissolving in water within the inner cylinder 2 and the outer cylinder 1. In a preferred embodiment, the inner cylinder 2 is made of stainless steel, a heat-conducting material.
[0029] Furthermore, in a preferred embodiment of this utility model, such as Figure 1 As shown, a support 3 is provided at the bottom of the outer cylinder 1, and the support 3 is fixedly connected to the top of the ammonia storage tank. To facilitate observation of the water level, a first transparent flange sight glass 14 and a second transparent flange sight glass 15 are respectively connected to the side walls of the outer cylinder 1 and the inner cylinder 2 near the top for observing the internal water level. The internal water level can be clearly observed through the transparent flange sight glasses.
[0030] In summary, the ammonia absorption device of this utility model is placed on top of the ammonia storage tank, which occupies a small area, does not require power equipment to continuously operate the spraying, and the dilute ammonia water after ammonia absorption can be recycled, which significantly saves investment costs and subsequent operating costs; in addition, after primary and secondary absorption, ammonia leakage is significantly reduced, which is obviously environmentally friendly.
[0031] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope. All such changes and modifications fall within the scope of protection of this utility model as claimed. The scope of protection of this utility model is defined by the appended claims and their equivalents.
Claims
1. A high-efficiency ammonia absorption device placed on top of an ammonia storage tank, characterized in that, The system includes an outer cylinder (1) located at the top of the ammonia storage tank and an inner cylinder (2) located within the outer cylinder (1). The inner cylinder (2) has a primary ammonia absorption chamber, and a secondary ammonia absorption chamber is formed between the outer cylinder (1) and the inner cylinder (2). Both the primary and secondary absorption chambers store aqueous solutions for absorbing ammonia. The top of the inner cylinder (2) is provided with an ammonia inlet pipe (4), a primary demineralized water inlet pipe (5), and a breather valve interface (6) connected to the primary absorption chamber. The bottom of the primary absorption chamber is provided with a primary ammonia dispersion pipe (7) connected to the lower end of the ammonia inlet pipe (4). The top is provided with a connecting pipe (8) connected to the secondary absorption chamber. The bottom of the secondary absorption chamber is provided with a secondary ammonia dispersion pipe (9) connected to the lower end of the connecting pipe (8). The bottom of the inner cylinder (2) is provided with a primary vent pipe (12) connected to the primary absorption chamber. The top of the outer cylinder (1) is provided with a secondary demineralized water inlet pipe (10) and an exhaust port (11) connected to the secondary absorption chamber. The bottom of the outer cylinder (1) is provided with a secondary vent pipe (13) connected to the secondary absorption chamber. The primary vent pipe (12) and the secondary vent pipe (13) are respectively provided with valves and connected to the ammonia storage tank.
2. The high-efficiency ammonia absorption device placed on top of an ammonia storage tank according to claim 1, characterized in that, An ammonia leak detector is installed above the breathing valve interface (6).
3. The high-efficiency ammonia absorption device placed on top of an ammonia storage tank according to claim 1, characterized in that, The primary ammonia dispersion tube (7) is a circular tube with several small holes on both sides of the side wall.
4. The high-efficiency ammonia absorption device placed on top of an ammonia storage tank according to claim 1, characterized in that, The secondary ammonia dispersion tube (9) is a circular tube with several small holes on both sides of the side wall.
5. The high-efficiency ammonia absorption device placed on top of an ammonia storage tank according to claim 1, characterized in that, The primary absorption chamber and the secondary absorption chamber have relatively small volumes, both being 0.5 m³. 3 about.
6. The high-efficiency ammonia absorption device placed on top of an ammonia storage tank according to claim 1, characterized in that, The inner cylinder (2) is made of thermally conductive material, and a heat exchange channel is established between the primary absorption cavity and the secondary absorption cavity.
7. The high-efficiency ammonia absorption device placed on top of an ammonia storage tank according to claim 6, characterized in that, The inner cylinder (2) is made of stainless steel thermally conductive material.
8. The high-efficiency ammonia absorption device placed on top of an ammonia storage tank according to claim 1, characterized in that, The bottom of the outer cylinder (1) is provided with a bracket (3), which is fixedly connected to the top of the ammonia storage tank.
9. The high-efficiency ammonia absorption device placed on top of an ammonia storage tank according to claim 1, characterized in that, The outer cylinder (1) and the inner cylinder (2) are respectively connected to a first transparent flange sight glass (14) and a second transparent flange sight glass (15) for observing the internal water level at the position near the top.