Positive pressure maintaining device of reaction tank for preparing fuel gas through aluminum ash hydrolysis
By setting up a pressure-regulating water washing tank in the aluminum ash hydrolysis reaction tank and using the water column to provide pressure, the problem of difficult maintenance of the positive pressure environment in the reaction tank is solved, and a safe positive pressure environment and the preparation of pure hydrogen is achieved.
Patent Information
- Application Number
- CN202422013593.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-20
- Publication Date
- 2025-06-24
- Estimated Expiration
- 2034-08-20
AI Technical Summary
The prior art cannot effectively ensure the positive pressure environment in the aluminum ash hydrolysis reaction tank, and there is a risk of explosion.
By setting up a pressure-regulating water washing tank, a water column is used to form in the intake pipe to provide pressure, ensure the positive pressure environment in the reaction tank, and realize pressure adjustment by adjusting the liquid level height.
Effective maintenance of the positive pressure environment in the reaction tank is achieved, the risk of explosion is reduced, and ammonia and impurities are absorbed through water to obtain pure hydrogen for gas preparation.
Smart Images
Figure CN223010526U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of gas preparation, and particularly relates to a positive pressure maintaining device for a reaction tank used for preparing gas by hydrolyzing aluminum ash. Background Art
[0002] At present, solid waste aluminum ash is generated during the aluminum smelting process. Hydrolyzing the aluminum ash can obtain ammonia and hydrogen. By separating ammonia and hydrogen, pure hydrogen can be obtained for use as gas, thereby realizing the reuse of aluminum ash.
[0003] The hydrolysis of aluminum ash is carried out in a sealed reaction tank. The oxygen content in the reaction tank needs to be ensured to be less than 0.5%. The entry of oxygen poses an explosion risk. Therefore, negative pressure is strictly prohibited in the reaction tank to prevent air leakage from the tank body seal. Existing technologies mostly focus on improving and designing the seal of the reaction tank and cannot effectively ensure a positive pressure environment in the reaction tank. Summary of the Utility Model
[0004] In order to solve the problem that existing technologies mostly focus on improving and designing the seal of the reaction tank for hydrolyzing aluminum ash and cannot effectively ensure a positive pressure environment in the reaction tank, the utility model provides a positive pressure maintaining device for a reaction tank used for preparing gas by hydrolyzing aluminum ash. By forming a water column in the inlet pipe with the water in the pressure regulating water washing tank, the water column provides pressure to the inlet pipe, thereby ensuring a positive pressure environment for the reaction tank for hydrolyzing aluminum ash, and the pressure in the reaction tank is adjusted by adjusting the liquid level height in the pressure regulating water washing tank.
[0005] In order to achieve the above object, the technical solution of the utility model is as follows:
[0006] A positive pressure maintaining device for a reaction tank used for preparing gas by hydrolyzing aluminum ash includes a pressure regulating water washing tank. The upper end of the side of the pressure regulating water washing tank is connected to an inlet pipe. One end of the inlet pipe extends into the pressure regulating water washing tank and then extends downward to the inside of the pressure regulating water washing tank, and the other end is connected to the reaction tank. An outlet pipe and a water inlet pipe are arranged at the top of the pressure regulating water washing tank. A water inlet valve is arranged on the water inlet pipe. The outlet pipe is connected to a gas collection device, and the water inlet pipe is connected to a water supply device. An outlet pipe is arranged at the bottom of the pressure regulating water washing tank, and a water outlet valve is arranged on the outlet pipe. The positive pressure state in the reaction tank is ensured by forming a water column in the inlet pipe, and ammonia in the gas transported by the inlet pipe is absorbed by the water in the pressure regulating water washing tank.
[0007] Preferably, the pressure regulating water washing tank includes a tank body, an upper head and a lower head. The outlet pipe is connected to the protruding end of the lower head, and both the water inlet pipe and the outlet pipe are connected to the upper head. Impurities in the pressure regulating water washing tank are discharged through the outlet pipe.
[0008] Preferably, the end of the inlet pipe located inside the pressure regulating water washing tank is located below the water surface to ensure that the gas pressure generated in the reaction tank penetrates the water column and then enters the pressure regulating water washing tank.
[0009] Preferably, a liquid level gauge is fixedly arranged on the side of the pressure-regulating water-washing tank for monitoring the water level in the pressure-regulating water-washing tank.
[0010] Preferably, the gas collection device is a gas holder for collecting gas.
[0011] Preferably, a plurality of support legs are fixedly arranged circumferentially at the lower end of the pressure-regulating water-washing tank to support the pressure-regulating water-washing tank.
[0012] By the above technical solution, the beneficial effects of the present utility model are as follows:
[0013] With the setting of the pressure-regulating water-washing tank in the present utility model, it is ensured that the gas generated by the hydrolysis of aluminum ash in the reaction tank must have a pressure sufficient to break through the water column at the end of the inlet pipe and then enter the pressure-regulating water-washing tank to separate the impurities and ammonia gas therein, and obtain pure hydrogen gas to be transported to the gas holder for storage, thereby realizing the preparation and collection of gas. The water column at the outlet end of the inlet pipe ensures that the reaction tank is in a positive pressure state; at the same time, the lower-layer sewage in the pressure-regulating water-washing tank is regularly discharged, and the remaining in the pressure-regulating water-washing tank is ammonia water dissolved with ammonia gas, realizing the reuse of aluminum ash; the water level in the pressure-regulating water-washing tank is monitored by the liquid level gauge to cooperate with the inlet pipe and the outlet pipe to adjust the water level height in the pressure-regulating water-washing tank, so as to adjust the height of the water column at the end of the inlet pipe and realize the adjustment of the pressure in the reaction tank. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 is a structural schematic diagram of the present utility model Figure One .
[0015] Figure 2 is a structural schematic diagram of the present utility model Figure Two .
[0016] The reference numerals in the drawings are: 1 is the pressure-regulating water-washing tank, 2 is the inlet pipe, 3 is the outlet pipe, 4 is the inlet water pipe, 5 is the inlet water valve, 6 is the outlet water pipe, 7 is the outlet water valve, 8 is the liquid level gauge, and 9 is the support leg. DETAILED DESCRIPTION OF THE EMBODIMENTS
[0017] The present utility model will be further described below in conjunction with the drawings and specific embodiments:
[0018] Such as Figures 1 to 2As shown in the figure, this embodiment provides a positive pressure maintaining device for a reaction tank used in the hydrolysis of aluminum ash to prepare fuel gas, which includes a pressure regulating water washing tank 1. A plurality of support legs 9 are fixedly arranged circumferentially at the lower end of the pressure regulating water washing tank 1. An air inlet pipe 2 is connected to the upper end of the side of the pressure regulating water washing tank 1. One end of the air inlet pipe 2 extends into the pressure regulating water washing tank 1 and then extends downward into the interior of the pressure regulating water washing tank 1, and the other end is connected to a reaction tank. The reaction tank can be multiple tanks connected by pipelines. The mixed gas of ammonia and hydrogen generated by the hydrolysis of aluminum ash and water in the reaction tank enters the pressure regulating water washing tank 1 through the air inlet pipe 2. The water in the pressure regulating water washing tank 1 will absorb the ammonia and the impurities mixed with the gas entering the pressure regulating water washing tank 1.
[0019] An air outlet pipe 3 and a water inlet pipe 4 are arranged at the top of the pressure regulating water washing tank 1. A water inlet valve 5 is arranged on the water inlet pipe 4. The air outlet pipe 3 is connected to a fuel gas collection device, and the fuel gas collection device is an air bag. The remaining gas after the water absorbs ammonia and impurities is hydrogen. The hydrogen rises and enters the air bag through the air outlet pipe 3 for storage. The water inlet pipe 4 is connected to a water supply device. The water supply device can be a water pump, which transports water into the pressure regulating water washing tank 1 and ensures the liquid level height in the pressure regulating water washing tank 1. The end of the air inlet pipe 2 located in the pressure regulating water washing tank 1 is below the water surface. Thus, a water column is formed in the air inlet pipe 2. By means of the water column, a reverse pressure is provided for the gas in the air inlet pipe 2. When the pressure of the gas generated in the reaction tank cannot ensure pushing out the water column in the air inlet pipe 2, the height of the water column rises to ensure that the reaction tank is in a positive pressure state. An outlet pipe 6 is arranged at the bottom of the pressure regulating water washing tank 1. A water outlet valve 7 is arranged on the outlet pipe 6. By regularly opening the water outlet valve 7, it is ensured that the sewage deposited at the lower end of the pressure regulating water washing tank 1 is discharged. The sewage is a suspension formed by the foam and other impurities generated during the hydrolysis of aluminum ash and the gas mixed into the pressure regulating water washing tank 1 and deposited at the bottom of the pressure regulating water washing tank 1.
[0020] The pressure regulating water washing tank 1 includes a tank body, an upper head and a lower head. The outlet pipe 6 is connected to the protruding end of the lower head. The water inlet pipe 4 and the air outlet pipe 3 are both connected to the upper head. Through the setting of the lower head, the smooth discharge of the sewage in the pressure regulating water washing tank 1 is ensured.
[0021] A liquid level gauge 8 is fixedly arranged on the side of the pressure regulating water washing tank 1. The water level gauge 8 adopts a magnetic flap liquid level gauge with the model of UHZ-819C-310. The water level in the pressure regulating water washing tank 1 is monitored through the liquid level gauge 8 to replenish water to ensure the water level height, and thus ensure the positive pressure environment in the reaction tank.
[0022] During use, aluminum ash and water hydrolyze in the reaction tank to produce ammonia and hydrogen. The generated ammonia, hydrogen, and the mixed gas containing impurities such as foam reach the pressure-regulating water-washing tank 1 through the inlet pipe 2. As the hydrolysis reaction of aluminum ash proceeds, the pressure in the reaction tank increases. Then, the mixed gas pushes out the water column at the end of the inlet pipe 2 and enters the water in the pressure-regulating water-washing tank 1. The impurities and ammonia in it are absorbed by water. Ammonia dissolves in water, and the impurities gradually precipitate at the bottom of the pressure-regulating water-washing tank 1. Hydrogen rises and reaches the gas collection device through the outlet pipe 3 to complete the preparation and collection of combustible gas.
[0023] During this process, the water level in the pressure-regulating water-washing tank 1 is monitored by the liquid level gauge 8. When fluctuations occur, water is replenished into the pressure-regulating water-washing tank 1 by opening the water inlet valve 5. By adjusting the water level in the pressure-regulating water-washing tank 1, the height of the water column at the end of the inlet pipe 2 is ensured, and then the pressure in the reaction tank is adjusted to ensure that the reaction tank is in a positive pressure state and the production safety is ensured.
[0024] The outlet valve 7 is regularly opened, and the lower-layer sewage in the pressure-regulating water-washing tank 1 is discharged through the outlet pipe 6 for treatment. After the water in the pressure-regulating water-washing tank 1 absorbs enough ammonia, the ammonia water in it is discharged and collected, and new water is replaced.
[0025] The above-described embodiments are only the preferred embodiments of the present invention and do not limit the scope of implementation of the present invention. Therefore, any equivalent changes or modifications made according to the structure, features, and principles described in the scope of the present invention patent shall be included in the scope of the present invention's patent application.
Claims
1. A device for maintaining positive pressure in a reaction tank for preparing fuel gas by hydrolyzing aluminum ash, characterized in that , comprising a pressure regulating water washing tank (1), the upper end of the side of the pressure regulating water washing tank (1) is connected to an air inlet pipe (2), one end of the air inlet pipe (2) extends into the pressure regulating water washing tank (1) and then extends downward to the inside of the pressure regulating water washing tank (1), and the other end is connected to a reaction tank; The top of the pressure-regulating water washing tank (1) is provided with an air outlet pipe (3) and a water inlet pipe (4), the water inlet pipe (4) is provided with a water inlet valve (5), the air outlet pipe (3) is connected to a gas collecting device, the water inlet pipe (4) is connected to a water supply device, and the bottom of the pressure-regulating water washing tank (1) is provided with a water outlet pipe (6), the water outlet pipe (6) is provided with a water outlet valve (7).
2. The device for maintaining positive pressure in a reaction tank for preparing fuel gas by hydrolyzing aluminum ash according to claim 1, characterized in that: The pressure-regulated water washing tank (1) comprises a tank body, an upper end cover and a lower end cover, the water outlet pipe (6) is connected to the protruding end of the lower end cover, and the water inlet pipe (4) and the air outlet pipe (3) are both connected to the upper end cover.
3. The device for maintaining positive pressure in a reaction tank for preparing fuel gas by hydrolyzing aluminum ash according to claim 1, characterized in that: The end of the air inlet pipe (2) located in the pressure regulating water washing tank (1) is located below the water surface.
4. The device for maintaining positive pressure in a reaction tank for preparing fuel gas by hydrolyzing aluminum ash according to claim 1, characterized in that: A liquid level meter (8) is fixedly arranged on the side of the pressure regulating water washing tank (1).
5. The device for maintaining positive pressure in a reaction tank for preparing fuel gas by hydrolyzing aluminum ash according to claim 1, characterized in that: The gas collection device is a gas bag.
6. The device for maintaining positive pressure in a reaction tank for preparing fuel gas by hydrolyzing aluminum ash according to claim 1, characterized in that: A plurality of supporting legs (9) are fixedly arranged in a circumferential direction at the lower end of the pressure regulating water washing tank (1).