Acid rain visual simulation experiment device

Abstract

The utility model discloses a kind of acid rain visual simulation experiment devices, including combustion chamber and tail gas treatment observation tank, combustion chamber is placed in the top of tail gas treatment observation tank, gas guide pipe is extended from the top of combustion chamber upwards and then arc downwardly communicates the top of tail gas treatment observation tank;Combustion chamber is built-in burner and sulfur powder combustion spoon;Tail gas treatment observation tank inside pre-stores water and magnetic stirrer;Tail gas treatment observation tank inside is handled to tail gas by neutralization management module, and data display is carried out by digital monitoring module;The utility model is formed by combustion chamber by gas guide pipe and tail gas treatment observation tank by adopting closed communication structure, combined with siphon gas guide system driven by negative pressure, the whole closed transmission and harmless treatment of sulfur powder combustion generation SO2 are realized, while tail gas treatment observation tank inside is provided with pH sensor, combined with digital monitoring module to generate ph value dynamic curve in real time, abstract acid rain formation and prevention process is converted into visual data.

Description

Technical Field

[0001] This utility model relates to a teaching experimental device for simulating the formation of acid rain, and more particularly to a visual simulation experimental device for acid rain. Background Technology

[0002] With the continuous development of industry, environmental problems have become increasingly prominent, among which acid rain is the most prominent. Acid rain is extremely damaging to metals, trees, and other environmental elements, as well as to human health. The formation, hazards, and prevention of acid rain are important topics in junior high school chemistry, with high educational value, helping students establish a scientific view of nature and green development, emphasizing harmony between humanity and nature. Furthermore, teachers are encouraged to explore the effects of acid rain on plants and buildings through experimental simulations. However, the current People's Education Press ninth-grade chemistry textbook presents acid rain content in a scattered manner, lacking experimental support, and in an abstract format.

[0003] Therefore, an acid rain visualization simulation experimental device is proposed to solve the above-mentioned problem of acid rain visualization. Utility Model Content

[0004] In order to solve the above-mentioned problems existing in the prior art, this utility model provides an acid rain visualization simulation experimental device.

[0005] The technical solution of this utility model is as follows:

[0006] A visual simulation experimental device for acid rain includes a combustion chamber and an exhaust gas treatment observation tank. The combustion chamber is located on top of the exhaust gas treatment observation tank. A gas guide pipe extends upward from the top of the combustion chamber and then curves downward to connect to the top of the exhaust gas treatment observation tank, forming a siphon effect to transport the exhaust gas. The combustion chamber houses a burner and a sulfur powder combustion spoon. The exhaust gas treatment observation tank contains pre-stored water and a magnetic stirrer. The exhaust gas is treated by a centralization and management module inside the exhaust gas treatment observation tank, and the data is displayed by a digital monitoring module.

[0007] Preferably, a damp paper towel is placed at the bottom of the burner.

[0008] Preferably, the neutralization and management module includes a syringe pre-stored with calcium hydroxide solution, which injects calcium hydroxide solution into the exhaust gas treatment observation tank in a controllable manner.

[0009] Preferably, the digital monitoring module includes a pH sensor, the probe of which is inserted below the water level in the exhaust gas treatment tank, and the tail of the pH sensor is connected to a data acquisition device placed outside the exhaust gas treatment observation tank for data collection. The data acquisition device is electrically connected to a data display device for real-time detection and output of the dynamic change curve of the solution pH.

[0010] Preferably, the combustion chamber is a transparent acrylic square box with an opening window at the front for adding sulfur powder to the sulfur powder combustion spoon.

[0011] This invention has the following beneficial effects: By adopting a closed-loop structure formed by the combustion chamber and the exhaust gas treatment observation tank through the gas guide pipe, combined with a negative pressure driven siphon gas guide system, this invention achieves the closed-loop transmission and harmless treatment of SO2 generated from sulfur powder combustion. That is, through the dual methods of water absorption and neutralization by calcium hydroxide, the pollution risk of teaching experiments is completely eliminated. At the same time, a pH sensor is installed inside the exhaust gas treatment observation tank, which, combined with a digital monitoring module, generates a dynamic acid-base curve in real time, transforming the abstract process of acid rain formation and prevention into visualized data, significantly improving students' in-depth understanding of core concepts. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall device structure of this utility model;

[0013] The reference numerals in the figure are as follows:

[0014] 1. Combustion chamber; 2. Wet paper towel; 3. Opening window; 4. Magnetic stirrer; 5. Water; 6. pH sensor; 7. Syringe; 8. Data acquisition unit; 9. Data display device; 10. Gas guide pipe; 11. Exhaust gas treatment observation tank; 12. Burner. Detailed Implementation

[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of the present utility model.

[0016] See Figure 1 A visual simulation experimental device for acid rain includes a combustion chamber 1 and an exhaust gas treatment observation tank 11. The combustion chamber 1 is a transparent acrylic square box with an opening and closing window 3 at the front for adding sulfur powder to the sulfur powder combustion spoon. The combustion chamber 1 is placed on top of the exhaust gas treatment observation tank 11. The gas guide pipe 10 extends upward from the top of the combustion chamber 1 and then arcs downward to connect to the top of the exhaust gas treatment observation tank 11 to form a siphon effect to transfer the exhaust gas. Through the negative pressure phenomenon generated by the heating between the gas guide pipe 10 and the combustion chamber 1, a one-way airflow channel is formed to achieve fully enclosed gas transmission.

[0017] Combustion chamber 1 contains a built-in burner 12 and a sulfur powder combustion spoon; exhaust gas treatment observation tank 11 contains pre-stored water 5 and a magnetic stirrer 4; the practical magnetic stirrer 4 can accelerate the dissolution of SO2 in water and enhance the uniformity of the reaction.

[0018] Furthermore, a wet paper towel 2 is laid at the bottom of the burner 12; the wet paper towel 2 absorbs the overflowing sulfur powder while buffering the gas pressure.

[0019] The exhaust gas treatment observation tank 11 treats the exhaust gas through a centralization and management module and displays the data through a digital monitoring module. The centralization and management module includes a syringe 7 pre-stored with calcium hydroxide solution, which injects calcium hydroxide solution into the exhaust gas treatment observation tank 11 in a controllable manner. The digital monitoring module includes a pH sensor 6, the probe of which is inserted below the water surface of the water 5 in the exhaust gas treatment tank 2. The tail of the pH sensor 6 is connected to a data acquisition device 8 placed outside the exhaust gas treatment observation tank 11 to collect data. The data acquisition device 8 is electrically connected to a data display device 9 to detect and output the dynamic change curve of the solution pH in real time.

[0020] The working principle of this utility model:

[0021] In this invention, the burner 12 in the combustion chamber 1 is first ignited (in this invention, the burner 12 is a candle), and then sulfur powder is ignited to generate SO2. The SO2 is then driven through the gas pipe 10 into the exhaust gas treatment observation tank 11 to dissolve using the siphon effect. The probe of the pH sensor 6 in the digital monitoring module is inserted below the water surface of the water 5 in the exhaust gas treatment tank 2. The tail of the pH sensor 6 is connected to a data acquisition device 8 placed outside the exhaust gas treatment observation tank 11 to collect data. The data acquisition device 8 is electrically connected to a data display device 9 to detect and output the dynamic change curve of the solution pH in real time. Next, the dissolved solution is added to an acidified barium chloride solution, and the white turbidity is observed to verify sulfate levels. Finally, calcium hydroxide solution is injected through a syringe 7, and the pH dynamic curve is observed in real time through the data display device 9 until it returns to neutral to demonstrate acid rain prevention.

[0022] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. An acid rain visualization simulation experimental device, comprising a combustion chamber (1) and an exhaust gas treatment observation tank (11), characterized in that: The combustion chamber (1) is located on top of the exhaust gas treatment observation tank (11). A gas guide pipe (10) is installed on the top of the combustion chamber (1), and the gas guide pipe (10) extends upward and then arcs downward to connect to the top of the exhaust gas treatment observation tank (11). The combustion chamber (1) contains a burner (12) and a sulfur powder combustion spoon. The exhaust gas treatment observation tank (11) contains pre-stored water (5) and a magnetic stirrer (4). The exhaust gas is treated by a central management module inside the exhaust gas treatment observation tank (11), and the data is displayed by a digital monitoring module.

2. The acid rain visualization simulation experimental device according to claim 1, characterized in that: A wet paper towel (2) is laid at the bottom of the burner (12).

3. The acid rain visualization simulation experimental device according to claim 1, characterized in that: The intermediate and management module includes a syringe (7) pre-stored with calcium hydroxide solution, which injects calcium hydroxide solution into the tail gas treatment observation tank (11) in a controlled manner.

4. The acid rain visualization simulation experimental device according to claim 1, characterized in that: The digital monitoring module includes a pH sensor (6). The probe of the pH sensor (6) is inserted below the water (5) in the exhaust gas treatment observation tank (11). The tail of the pH sensor (6) is connected to a data acquisition device (8) placed outside the exhaust gas treatment observation tank (11) to collect data. The data acquisition device (8) is electrically connected to a data display device (9) to detect and output the dynamic change curve of the solution pH in real time.

5. The acid rain visualization simulation experimental device according to claim 1, characterized in that: The combustion chamber (1) is made of transparent acrylic square box, and an opening window (3) is opened at the front for adding sulfur powder to the sulfur powder combustion spoon.

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