Solution pipe for photocatalytic hydrogen production device

Abstract

The utility model relates to a solution pipe for a photocatalytic hydrogen production device, which comprises a plurality of sections of pipe bodies, one end of the straight pipe section is connected and communicated with one end of the spiral section; one end of the bent pipe section is connected and communicated with the other end of the straight pipe section, and the other end of the straight pipe section is connected and communicated with one end of the spiral section of the other pipe body; the spiral section comprises a spiral pipe A and a spiral pipe B which are both spiral, the spiral pipe A and the spiral pipe B are the same in specification, and the spiral pipe A and the spiral pipe B are arranged in a mutual winding mode; two ends of the spiral pipe A and the spiral pipe B are respectively connected with an arc-shaped pipe A and an arc-shaped pipe B; the arc-shaped pipe A at one end of the spiral pipe A and the spiral pipe B converges at an M point, and the arc-shaped pipe B at the other end of the spiral pipe A and the spiral pipe B converges at an N point; the N point is connected and communicated with one end of the straight pipe section, and the M point is connected and communicated with one end of the bent pipe section of the other pipe body. According to the solution tube, the concentration of titanium dioxide in a mixed solution can be distributed more reasonably in the spiral section.

Description

Technical Field

[0001] The utility model belongs to a photocatalytic hydrogen production device, in particular to a solution tube for the photocatalytic hydrogen production device. Background Art

[0002] Ultraviolet hydrogen production and electrolysis are two commonly used methods for hydrogen production. Ultraviolet hydrogen production is generally used in experiments.

[0003] Application publication number CN117504773A discloses a photocatalytic hydrogen production device, which is a previous patent application of the inventor. In this prior art, the inventor uses a water inlet pipe composed of a straight pipe section and an expansion section. The flow rate of titanium dioxide in the mixed liquid slows down when passing through the expansion section, which can increase the residence time of titanium dioxide in the mixed liquid in the water inlet pipe, so that the titanium dioxide in the mixed liquid can participate more fully in the photocatalytic reaction. Moreover, the expansion section adopts an ellipsoidal design, which can make the light intensity distribution more uniform, which helps the uniformity of titanium dioxide participating in the reaction.

[0004] However, after subsequent research, the inventors found that due to the use of an ellipsoidal expansion section, there is a flow resistance loss and a reduced flow velocity at the outlet of the expansion section, so the mixed liquid will form a vortex at the outlet of the ellipsoidal expansion section, causing the flow of titanium dioxide inside the ellipsoidal expansion section to become unstable, and the titanium dioxide concentration at the vortex becomes lower, ultimately resulting in an uneven distribution of titanium dioxide inside the ellipsoidal expansion section, affecting the photocatalytic reaction. Utility Model Content

[0005] The utility model discloses a solution pipe for a photocatalytic hydrogen production device, which is used to avoid uneven distribution of titanium dioxide in a mixed solution.

[0006] In order to achieve the above-mentioned purpose, the utility model provides a solution pipe for a photocatalytic hydrogen production device, comprising a plurality of pipe sections, each of which comprises:

[0007] Helical segment;

[0008] A straight pipe section, one end of which is connected and communicated with one end of the spiral section;

[0009] The curved pipe section has one end connected and communicated with the other end of the straight pipe section, and the other end of the straight pipe section is connected and communicated with one end of the spiral section of another pipe body;

[0010] The spiral section includes:

[0011] The spiral tube A and the spiral tube B are both spiral-shaped, have the same specifications, and are wound around each other.

[0012] The two ends of the spiral tube A and the spiral tube B are connected to an arc tube A and an arc tube B respectively; the arc tube A at one end of the spiral tube A and the spiral tube B converges at point M, and the arc tube B at the other end of the spiral tube A and the spiral tube B converges at point N;

[0013] Point N is connected and communicated with one end of the straight pipe section, and point M is connected and communicated with one end of the other curved pipe section of the pipe body.

[0014] Furthermore, the spiral tube A and the spiral tube B are both 1 / 4 circular tubes.

[0015] The reason for this design is that the connection between the spiral tube A and the spiral tube B is relatively smooth, and the two 1 / 4 circles can also converge at one point relatively easily.

[0016] Furthermore, the inner diameters of the spiral section, the straight pipe section and the curved pipe section are equal.

[0017] During the flow of the mixed liquid, there will be no sudden changes in the inner diameter and vortexes are not likely to occur.

[0018] Beneficial Effects

[0019] In this solution, a spiral segment is used to replace the ellipsoid segment in the prior art mentioned in the background technology, so that the titanium dioxide concentration distribution of the mixed liquid in the spiral segment can be more reasonable. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the solution tube;

[0021] Figure 2 It is a schematic diagram of the structure of the spiral segment;

[0022] Figure 3 It is a simulation diagram of titanium dioxide concentration distribution in the ellipsoid segment;

[0023] Figure 4 This is a simulation diagram of titanium dioxide concentration distribution in a straight tube;

[0024] Figure 5 This is a simulation diagram of the titanium dioxide concentration distribution in the spiral segment.

[0025] 1. Spiral section; 2. Straight pipe section; 3. Curved pipe section; 11. Spiral pipe A; 12. Spiral pipe B; 13. Arc pipe A; 14. Arc pipe B. DETAILED DESCRIPTION

[0026] In order to make the purpose, technical solution and advantages of the embodiments of the utility model clearer, the technical solution of the utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Embodiment 1:

[0027] A solution tube for a photocatalytic hydrogen production device is serpentine-shaped. One end of the solution tube is connected to an injection tube, which is used to inject a mixed solution of titanium dioxide and water evenly mixed into the solution tube; the other end is connected to a hydrogen collection mechanism, which is used to collect prepared hydrogen and discharge other gases other than hydrogen.

[0028] See Figure 1 The solution tube includes multiple sections of tube bodies, each of which includes:

[0029] Helical segment 1;

[0030] One end of the straight pipe section 2 is connected and communicated with one end of the spiral section 1; in this embodiment, the straight pipe section 2 is a straight circular pipe.

[0031] One end of the curved pipe section 3 is connected and communicated with the other end of the straight pipe section 2; the other end of the curved pipe section 3 is connected and communicated with one end of the spiral section 1 of another pipe body. In this embodiment, the curved pipe section 3 is a 1 / 2 round pipe.

[0032] See Figure 2 , spiral segment 1 comprises:

[0033] The spiral tube A11 and the spiral tube B12 are both spiral-shaped, have the same specifications, and are wound around each other.

[0034] There are two groups of arc tubes, each group of arc tubes includes an arc tube A13 and an arc tube B14, and the arc tube A13 and the arc tube B14 in each group of arc tubes are respectively connected to the two ends of the corresponding spiral tube A11 and the spiral tube B12. The arc tube A13 at one end of the spiral tube A11 and the spiral tube B12 converge at a point, which is recorded as point M; the arc tube B14 at the other end of the spiral tube A11 and the spiral tube B12 converge at a point, which is recorded as point N. Point N is connected and communicated with one end of the straight tube section 2, and point M is connected and communicated with one end of another pipe body curved tube section 3.

[0035] In this embodiment, the spiral tube A11 and the spiral tube B12 are both 1 / 4 round tubes. The spiral tube A11 and the spiral tube B12 are also round tubes.

[0036] The inner diameters of the spiral section 1, the straight pipe section 2 and the curved pipe section 3 are equal.

[0037] The liquid injection tube and hydrogen collection mechanism in this embodiment have the same structure as those in the prior art mentioned in the background art, so they will not be described in detail here.

[0038] The implementation of this embodiment also relies on a UV lamp that completely wraps the solution tube and is adapted to the shape of the solution tube. The solution tube is a transparent tube, and the ultraviolet light generated by the UV lamp can pass through the solution tube. The UV lamp is a lamp of the same specification as the prior art mentioned in the background technology. The only difference is that in this embodiment, in order to adapt to the spiral section 1 of the injection tube, the UV lamp has a different structure in the spiral section 1. The prior art adapts to the ellipsoidal expansion section, while this embodiment adapts to the spiral spiral section 1. For other structures not mentioned, refer to the prior art in the background technology. Embodiment 2:

[0039] In order to verify that the concentration distribution of the titanium dioxide and water mixture in Example 1 is optimal, three groups of experiments were designed using simulation software. The titanium dioxide mixture concentration input in the three groups of experiments was 1g / L, the volume fraction was 0.00025, and it was fully mixed before entering the tube in each experiment, the concentration distribution was uniform, and the suspension inlet speed was 1.8m / s. The three groups of experiments were respectively for the following three situations:

[0040] Case 1: As the existing means mentioned in the background technology, an ellipsoidal expansion section is used. This is called Experiment 1.

[0041] Case 2: Use a straight pipe to replace the expansion section in Case 1. This is called Test 2.

[0042] Case 3: The expansion section in Case 1 is replaced by spiral section 1. This is called Test 3.

[0043] The results of the three groups of experiments are Figure 3 , Figure 4 and Figure 5 shown. Figure 3 , Figure 4 and Figure 5 The concentration bars are the volume fraction of titanium dioxide in the mixed solution. Figure 3 The rightmost point of the medium concentration bar is 0.000268, and the leftmost point is zero; Figure 4 and Figure 5 The red color on the far right of the concentration bar represents a volume fraction of 0.0005, and the blue color on the far left represents a volume fraction of 0. The flow direction of the mixed liquid is from right to left.

[0044] from Figure 3 It can be seen from the figure that the mixed liquid forms a vortex at the outlet of the ellipsoid segment, which makes the mixed liquid flow unstable inside the ellipsoid segment. The titanium dioxide concentration distribution in the middle of the ellipsoid segment is uneven, resulting in a region with lower concentration.

[0045] from Figure 4 It can be seen that titanium dioxide continues to sink due to gravity, resulting in a low degree of mixing with water and inability to achieve uniform concentration distribution in the tube.

[0046] from Figure 5 It can be seen that the concentration distribution of the mixed liquid in the spiral section 1 is very uniform. After exiting the spiral section 1, the flow rate slows down due to the sudden increase in the tube diameter, forming a vortex, which makes the concentration distribution slightly uneven. However, compared with the titanium dioxide concentration distribution in the ellipsoid section and the straight tube, Figure 5 The concentration distribution of titanium dioxide in the solution is more reasonable and more conducive to photocatalytic reaction.

[0047] Based on the above ideal embodiments of the utility model, the relevant staff can make various changes and modifications without deviating from the technical concept of the utility model through the above description. The technical scope of the utility model is not limited to the content of the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A solution tube for a photocatalytic hydrogen production device, characterized in that: It includes multiple sections of pipe body, each section of pipe body includes: Helical segment (1); A straight pipe section (2) has one end connected to and in communication with one end of the spiral section (1); The curved pipe section (3) has one end connected to and communicated with the other end of the straight pipe section (2), and the other end of the curved pipe section (3) is connected to and communicated with one end of the spiral section (1) of another pipe body; The spiral section (1) comprises: The spiral tube A (11) and the spiral tube B (12) are both spiral-shaped, and the spiral tube A (11) and the spiral tube B (12) have the same specifications. The spiral tube A (11) and the spiral tube B (12) are arranged to be intertwined with each other; The two ends of the spiral tube A (11) and the spiral tube B (12) are connected to an arc tube A (13) and an arc tube B (14) respectively; the arc tube A (13) at one end of the spiral tube A (11) and the spiral tube B (12) meet at point M, and the arc tube B (14) at the other end of the spiral tube A (11) and the spiral tube B (12) meet at point N; Point N is connected to and communicated with one end of the straight pipe section (2), and point M is connected to and communicated with one end of another curved pipe section (3) of the pipe body.

2. The solution tube for a photocatalytic hydrogen production device according to claim 1, characterized in that: The spiral tube A (11) and the spiral tube B (12) are both 1 / 4 round tubes.

3. The solution tube for a photocatalytic hydrogen production device according to claim 1, characterized in that: The inner diameters of the spiral section (1), the straight pipe section (2) and the curved pipe section (3) are equal.

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