A water-sealed exhaust device for a high-efficiency and controllable hydrogen-ammonia decomposition gas recovery and purification system

Abstract

This invention provides a water-sealed exhaust device for a high-efficiency and controllable hydrogen-ammonia decomposition gas recovery and purification system. The device includes a housing with a gas outlet at the top and a decomposition gas delivery pipe with its output end located at the bottom. A guide assembly is positioned along the movement path of the decomposition gas. The guide assembly includes a first baffle plate and a second baffle plate, both of which are swayably mounted on the housing. The length of the first baffle plate is shorter than that of the second baffle plate. A first rupture portion is fixed to the first baffle plate, and a second rupture portion is fixed to the second baffle plate. The guide assembly also includes a driving component, which is L-shaped and rotatably and slidably connected to the first and second baffle plates. By using two levels of baffle plates with first and second rupture portions, rising bubbles can be continuously and effectively physically broken down, pulverizing large bubbles into finer bubbles.

Description

Technical Field

[0001] This utility model relates to the field of gas recovery and purification technology, specifically a water-sealed exhaust device for a high-efficiency and controllable hydrogen-ammonia decomposition gas recovery and purification system. Background Technology

[0002] In hydrogen-ammonia decomposition gas recovery and purification systems, water-sealed exhaust devices are an indispensable component. Their core function is to remove ammonia from the gas through water washing and safely discharge the remaining gas. However, existing water-sealed exhaust devices have revealed significant shortcomings in practical industrial applications, which severely restrict the overall efficiency and environmental performance of the system.

[0003] Firstly, when the system processes large volumes of mixed hydrogen and ammonia decomposition gas, a prominent problem is the tendency for the gas to easily form large bubbles within the water seal device. These large bubbles have an extremely low surface area to volume ratio, preventing the ammonia molecules from fully contacting the water and effectively dissolving and absorbing. As a result, a significant amount of ammonia fails to be captured by the water and instead rises rapidly with the large bubbles, escaping directly from the exhaust port. This not only wastes valuable ammonia resources but also directly leads to severe environmental pollution, posing a threat to air quality and the health of operators.

[0004] Secondly, to improve the contact efficiency between gas and water, existing water seal devices typically incorporate guide plates, designed to force bubbles to rise along a tortuous path, thereby extending their residence time and contact distance in the water. However, this seemingly reasonable improvement has failed to achieve the desired effect in practice. When a large flow of gas enters, although the guide plate may initially disperse the gas into smaller bubbles, the high gas velocity and van der Waals forces between the bubbles cause these dispersed bubbles to easily collide and coalesce into larger bubbles along the tortuous path. This "secondary coalescence effect" not only negates the initial positive effect of the guide plate in dispersing bubbles but may also exacerbate the large bubble problem by increasing the chances of bubble coalescence, ultimately failing to fundamentally solve the dilemma of ammonia escape during high-flow-rate gas processing. Utility Model Content

[0005] The purpose of this invention is to overcome the shortcomings of the existing technology and provide a water-sealed exhaust device for a high-efficiency and controllable hydrogen ammonia decomposition gas recovery and purification system. It aims to solve the problems of low ammonia absorption efficiency, resource waste and environmental pollution caused by the easy formation and difficulty in breaking bubbles and the easy secondary polymerization of bubbles when processing large flow rates of gas.

[0006] To achieve the above objectives, this utility model provides the following technical solution:

[0007] A water-sealed exhaust device for a highly efficient and controllable hydrogen-ammonia decomposition gas recovery and purification system includes a housing with a gas outlet at the top.

[0008] It also includes a decomposed gas delivery pipeline, the output end of which is located at the lower end of the housing;

[0009] A guiding assembly is disposed on the movement path of the decomposed gas. The guiding assembly includes a first baffle plate and a second baffle plate. Both the first baffle plate and the second baffle plate are swayably disposed on the housing. The length of the first baffle plate is less than that of the second baffle plate. A first rupture part is fixed on the first baffle plate, and a second rupture part is fixed on the second baffle plate.

[0010] The guide assembly further includes a drive member, which is L-shaped and rotatably and slidably connected to the first and second blocking plates.

[0011] As a preferred embodiment, the first fracture portion is provided with collision blocks extending in a zigzag shape, and the collision blocks are arranged in multiple rows, with each row of collision blocks being staggered.

[0012] As a preferred embodiment, the second fracture portion is provided with splitting blocks with a triangular cross-section, and the splitting blocks are arranged in multiple rows, with each row of splitting blocks being staggered.

[0013] As a preferred embodiment, the first and second blocking plates are provided with movable grooves, and the driving member is provided with a driving rod, which slides within the movable grooves.

[0014] As a preferred embodiment, a motor is fixedly mounted on the housing, and the output end of the motor is fixedly connected to the drive component.

[0015] As a preferred embodiment, a bubble generator is installed on the decomposed gas delivery pipeline.

[0016] Compared with the prior art, the present invention has the following beneficial effects:

[0017] 1. Highly efficient bubble breaking capability: By setting up a two-stage baffle plate with a first breaking section and a second breaking section, the rising bubbles can be continuously and effectively physically broken up, crushing large bubbles into fine small bubbles, which greatly increases the specific surface area of ​​gas-liquid contact and provides favorable conditions for the full dissolution of ammonia.

[0018] 2. Prevention of secondary bubble aggregation: The core advantage of this invention lies in its "controllability." The driving component can move the L-shaped drive component according to the real-time monitored gas flow rate, and then precisely adjust the swing angle of the first and second baffle plates through the drive rod sliding in the movable groove. When the gas flow rate increases, the swing amplitude of the baffle plates can be appropriately increased or their relative positions adjusted to generate a stronger turbulence effect, effectively suppressing the secondary aggregation of small bubbles due to excessive flow velocity, thus fundamentally solving the defects of existing fixed guide plates.

[0019] 3. Improved ammonia recovery rate and environmental friendliness: Due to the effective breaking of bubbles and the suppression of secondary polymerization, the residence time and contact area of ​​ammonia in water are significantly increased, resulting in a substantial improvement in absorption efficiency. This not only reduces the loss of valuable ammonia resources but also significantly reduces the amount of ammonia escaping from the exhaust port, mitigating environmental pollution and demonstrating good economic and environmental benefits. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, for those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is one of the structural schematic diagrams of the working state of an embodiment of the present utility model;

[0022] Figure 2 This is a second structural schematic diagram of the working state of an embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the structure of the second fracture portion in one embodiment of the present invention;

[0024] Figure 4 This is a schematic diagram of the structure of the first fracture portion in one embodiment of the present invention.

[0025] Explanation of reference numerals in the attached figures:

[0026] 1. Housing; 11. Gas outlet;

[0027] 2. Decomposed gas delivery pipeline; 21. Bubble generator;

[0028] 3. Guide assembly; 31. First baffle plate; 311. First fracture section; 312. Collision block; 313. Movable groove; 32. Second baffle plate; 321. Second fracture section; 322. Splitting block; 33. Driving component; 331. Driving rod; Detailed Implementation

[0029] The accompanying drawings are for illustrative purposes only and should not be construed as limiting the scope of this patent. To better illustrate this embodiment, some parts in the drawings may be omitted, enlarged, or reduced, and do not represent the actual dimensions of the product.

[0030] It will be understood by those skilled in the art that certain well-known structures and their descriptions may be omitted in the accompanying drawings. The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0031] Please see Figure 1-4 This invention provides a water-sealed exhaust device for a high-efficiency and controllable hydrogen ammonia decomposition gas recovery and purification system. The device is installed in a water-filled box 1, and the upper part of the box 1 is provided with a gas outlet 11 for discharging purified hydrogen.

[0032] The device mainly includes a decomposed gas conveying pipeline 2 and a core guiding assembly 3.

[0033] The decomposed gas delivery pipe 2 is responsible for sending the decomposed gas containing hydrogen and ammonia from the bottom of the tank 1 into the water. Preferably, a bubble generator 21, such as a perforated plate or aeration head, can be installed at the end of the pipe to initially disperse the incoming gas and form initial bubbles.

[0034] The guide assembly 3 is located in the path of the rising gas and is used to guide and handle the bubbles. This assembly includes a first baffle plate 31 and a second baffle plate 32 that are pivotally mounted on the inner wall of the housing 1.

[0035] A first rupture section 311 is fixed on the first baffle plate 31. In this embodiment, the first rupture section 311 is composed of multiple rows of staggered collision blocks 312 extending in a zigzag shape. When the bubble rises from below and first contacts the first baffle plate 31, these collision blocks 312 with complex tortuous surfaces will exert a strong impact and shearing effect on the bubble, achieving the first breakage.

[0036] The second baffle plate 32 is longer than the first baffle plate 31, and a second fracturing section 321 is fixed on it. In this embodiment, the second fracturing section 321 is composed of multiple rows of staggered splitting blocks 322 with triangular cross-sections. As the bubbles rise after the first fracturing, upon encountering the second baffle plate 32, these sharp triangular splitting blocks 322 act like wedges, further splitting the bubbles into smaller microbubbles, achieving a second stage of deep fracturing. This two-stage fracturing structure ensures extremely high bubble fracturing efficiency.

[0037] The key component of the guide assembly 3 is an L-shaped drive member 33. This drive member 33 is connected to the first blocking plate 31 and the second blocking plate 32 via a rotatable and slidable connection. Specifically, both the first blocking plate 31 and the second blocking plate 32 have movable slots 313, and a drive rod 331 extends from the L-shaped drive member 33, the end of which slides within the corresponding movable slot 313. Simultaneously, the drive member 33 itself and the two blocking plates are connected to the housing 1 or a fixed bracket via hinge points.

[0038] To achieve active control, a motor is fixedly mounted on housing 1, and its output shaft is connected to L-shaped drive component 33. The motor can be a stepper motor or a servo motor to achieve precise angle and position control.

[0039] The workflow is as follows:

[0040] First, the mixed decomposition gas of hydrogen and ammonia enters the water through the bottom conveyor pipe, forming bubbles. As the bubbles rise, they first collide with the zigzag collision block 312 on the first baffle plate 31, where they are initially broken up. The broken bubble group continues along... Figure 1 The black path shown rises and encounters the second blocking plate 32, where it is subjected to a second deep split by the triangular splitting block 322, forming a large number of tiny bubbles.

[0041] During this process, the control system (e.g., PLC) controls the rotation of the motor based on the signal from the gas flow meter (not shown). The motor drives the L-shaped drive member 33 to move. The L-shaped drive member 33 is connected to the two baffle plates by a sliding-rotation combination, which can simultaneously change the swing angle and relative distance of the first baffle plate 31 and the second baffle plate 32.

[0042] When the gas flow rate is low, the angle between the two plates can be adjusted to be steeper, forming a more tortuous path to prolong the bubble residence time.

[0043] As the gas flow rate increases, to prevent small bubbles from re-aggregating into larger bubbles due to high flow velocity (i.e., the "secondary aggregation effect"), the control system drives the motor and adjusts the drive component 33 to change the swing angle and even the swing frequency of the two baffles. This dynamic adjustment generates strong turbulence, effectively breaking up bubbles attempting to aggregate and ensuring that the bubbles remain dispersed. The fully refined microbubbles have a huge specific surface area and come into full contact with the water during their tortuous upward path, where ammonia is efficiently absorbed and dissolved. Finally, the hydrogen gas, now free of ammonia, rises to the water surface and is discharged from the gas outlet 11 at the top of the tank 1.

[0044] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. A water seal exhaust device of a high-efficiency controllable hydrogen ammonia decomposition gas recovery and purification system, comprising a box, a gas outlet is arranged at the upper part of the box, characterized in that : The decomposed gas conveying pipeline has its output end located at the lower end of the housing; A guiding assembly is disposed on the movement path of the decomposed gas. The guiding assembly includes a first baffle plate and a second baffle plate. Both the first baffle plate and the second baffle plate are swayably disposed on the housing. The length of the first baffle plate is less than that of the second baffle plate. A first rupture part is fixed on the first baffle plate, and a second rupture part is fixed on the second baffle plate. The guide assembly further includes a drive member, which is L-shaped and rotatably and slidably connected to the first and second blocking plates.

2. The water seal exhaust device of the high-efficiency controllable hydrogen ammonia decomposition gas recovery and purification system according to claim 1, characterized in that, The first fracture portion is provided with collision blocks extending in a zigzag shape, and the collision blocks are arranged in multiple rows, with each row of collision blocks being staggered.

3. The water seal exhaust device of the high-efficiency controllable hydrogen ammonia decomposition gas recovery and purification system according to claim 2, characterized in that, The second fractured part is provided with split blocks with a triangular cross-section. The split blocks are arranged in multiple rows, and the split blocks in each row are staggered.

4. The water seal exhaust device of the high-efficiency controllable hydrogen ammonia decomposition gas recovery and purification system according to claim 1, characterized in that, The first and second blocking plates are provided with movable grooves, and the driving member is provided with a driving rod, which slides in the movable groove.

5. The water seal exhaust device of the high-efficiency controllable hydrogen ammonia decomposition gas recovery and purification system according to claim 1, characterized in that, A motor is fixedly mounted on the housing, and the output end of the motor is fixedly connected to the drive component.

6. The water seal exhaust device of the high-efficiency controllable hydrogen ammonia decomposition gas recovery and purification system according to claim 1, characterized in that, A bubble generator is installed on the decomposed gas delivery pipeline.

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