Micro-mixer for preparing mixed acid for water quality detection

Abstract

The utility model discloses a micro mixer for preparing mixed acid for water quality detection, which comprises a cavity seat, a cavity is arranged on one side of the cavity seat, a fluid channel is arranged on one side of the cavity, and a hollow cavity is arranged in the fluid channel. According to the utility model, the size of the cross section of the fluid channel is gradually increased along the direction far away from the mixing gap, the narrow mixing gap controls the position where reaction begins to occur at a certain depth, meanwhile, the mixing amount of acid liquor is limited, and the acid liquor flows downwards to pass through the arc-shaped plate, so that the acid liquor is continuously shunted and mixed in a mixing area; intense heat release caused by concentrated reaction of acid liquor is avoided, and the retention time is prolonged to guarantee the mixing effect; during mounting and matching, the limiting blocks are connected into the sliding grooves in a sliding manner to play a role in guide mounting, so that an operator can position and mount conveniently, and the assembly precision of the cavity seat and the cavity is ensured conveniently; the cooling liquid is poured into the cavity to absorb heat released when the acid liquid is mixed, and meanwhile, the cavity seat with good adiabaticity wraps the cavity, so that an operator is prevented from being scalded due to contact.

Description

Technical Field

[0001] This utility model belongs to the field of water quality testing technology, and in particular relates to a micro mixer for preparing mixed acid for water quality testing. Background Technology

[0002] Water quality testing is the process of assessing the physical, chemical, and biological parameters of water bodies to determine whether they meet specific standards and requirements. Nitrates and nitrites are among the common harmful substances detected in water quality testing. Their levels can be used to assess the degree of water pollution. Mixed acids are often used in this process, but their preparation is usually dangerous, involving intense exothermic reactions, and even slight mishandling can cause injury to laboratory personnel. Therefore, there is a need to develop a mixed acid preparation device that can reduce the risk of exothermic reactions and provide on-demand preparation. A micromixer is a small device used for mixing liquids in a microfluidic system. It typically consists of a microchannel structure and can rapidly and uniformly mix two or more liquids together. Micromixers are usually very compact to fit the size and requirements of microfluidic systems.

[0003] A search revealed a simple multi-channel micro mixer device with patent publication number "CN 218688861 U", comprising a reaction chamber seat, a threaded connection port, and a discharge seat. The threaded connection port is located on the upper part of the reaction chamber seat, and the discharge seat is located in the lower middle part of the reaction chamber seat. A discharge pipe is located inside the discharge seat. An inlet is located at the bottom of the threaded connection port and on the upper surface of the reaction chamber seat. A mixing chamber is located in the middle of the reaction chamber seat, and the inner side of the mixing chamber is connected to the inlet port through an inlet channel. An outlet is located in the middle of the mixing chamber, and the lower part of the outlet is connected to the upper part of the discharge pipe.

[0004] Further research revealed that the purpose of publication number "CN 218688861 U" is to enable multiple fluid streams to undergo turbulent eddy mixing within a mixing chamber, and after instantaneous mixing, the mixture enters a spiral tube for further mixing, resulting in better homogenization of the feed flow, extended average residence time, and a narrower residence time.

[0005] The above technical features have the following shortcomings: if the mixing of liquids in the mixer is accompanied by violent heat release, the slightest carelessness in operation may cause injury to the experimental personnel. At the same time, it is not convenient to disassemble and clean, and it is difficult to deal with the blockage of the micro mixer channel. There are safety hazards when using the device, and it occupies a large space and is difficult to maintain. Therefore, it is urgent to design a micro mixer for preparing mixed acid for water quality testing to solve the above problems. Utility Model Content

[0006] To address the shortcomings of existing technologies, this invention provides a micro-mixer for preparing mixed acid for water quality testing, thereby solving the problems mentioned in the background section.

[0007] To achieve the above objectives, this utility model provides the following technical solution:

[0008] A micro mixer for preparing mixed acid for water quality testing includes a cavity seat, a cavity body is provided on one side of the cavity seat, a fluid channel is opened on one side of the cavity body, and a hollow chamber is provided inside the cavity body.

[0009] Preferably, the cavity is provided with an inlet and an outlet that communicate with the fluid channel. The inlet and the outlet are respectively located at both ends of the cavity, so that the acid solution enters the fluid channel through the inlet, mixes, and then flows out through the outlet.

[0010] Preferably, the fluid channel is Y-shaped and has a mixing gap in the middle section. The cross-sectional dimensions of the fluid channel gradually increase in the direction away from the mixing gap, and a long strip-shaped sealing block is provided along the edge of the fluid channel.

[0011] Preferably, the fluid channel is provided with a number of arc-shaped plates, and the notches of the arc-shaped plates are oriented toward the drain port.

[0012] Preferably, the cavity has a recessed groove matching the shape of the fluid channel on the side near the cavity seat, and a sliding groove is formed at its bottom.

[0013] Preferably, a limiting block is fixedly provided at the bottom of the cavity on the side away from the fluid channel, and the limiting block is slidably connected in the groove.

[0014] Preferably, the chamber is filled with coolant to absorb the heat released during the mixing of the acid solutions.

[0015] Preferably, the cavity seat is made of a thermally insulating material selected from ceramic or polymer materials.

[0016] Preferably, the cavity seat and the cavity body are detachably connected by screws and nuts, and the cavity seat and the fixing blocks located at the four corners of the cavity body are respectively provided with threaded holes that cooperate with the screws.

[0017] This invention provides a micro-mixer for preparing mixed acid for water quality testing, which has the following advantages:

[0018] 1. In this utility model, the cross-sectional size of the fluid channel gradually increases along the direction away from the mixing gap. The narrow mixing gap controls the position where the reaction begins to occur at a certain depth, while limiting the amount of acid mixed. As the fluid continues to flow downward, it passes through the arc-shaped plate with the opening facing downward, so that the two acids are continuously diverted, mixed and turbulent in the mixing area, avoiding the concentrated reaction of the acid and violent exothermic reaction. At the same time, the residence time is extended so that the acid is better mixed.

[0019] 2. In this utility model, the sealing block is set along the outer edge of the fluid channel to avoid acid leakage and ensure the stability and safety of the micro mixer;

[0020] 3. In this utility model, during installation, the limiting block is slidably connected in the groove, which plays a guiding role in the installation, making it easier for the operator to position and install, and ensuring the assembly accuracy of the cavity seat and the cavity body.

[0021] 4. In this utility model, by injecting coolant into the cavity, the heat released when the acid solution is mixed is absorbed, and at the same time, the cavity body is covered with a cavity seat with good thermal insulation to prevent operators from being burned by contact. Attached Figure Description

[0022] Figure 1 This is a perspective view of a micromixer for preparing mixed acid for water quality testing as described in this utility model;

[0023] Figure 2 This is a schematic diagram of the structure of a micromixer chamber seat for preparing mixed acid for water quality testing, as described in this utility model;

[0024] Figure 3 This is a schematic diagram of the structure of a micromixer cavity for preparing mixed acid for water quality testing, as described in this utility model;

[0025] Figure 4 This is a schematic diagram of the structure of a micromixer chamber for preparing mixed acid for water quality testing, as described in this utility model.

[0026] In the diagram: 1. Cavity seat; 101. Recessed groove; 102. Slide groove; 2. Cavity; 201. Limiting block; 202. Sealing block; 3. Fluid channel; 301. Liquid inlet; 302. Mixing obstruction; 303. Liquid outlet; 304. Arc plate; 4. Chamber; 5. Fixing block; 6. Threaded hole; 7. Screw; 8. Nut.

[0027] The instruments described in this invention can all be obtained through market purchase or private customization. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the protection scope of the present utility model.

[0029] Please see Figures 1-4 This utility model provides a technical solution: a micro mixer for preparing mixed acid for water quality testing, including a cavity seat 1, a cavity 2 on one side of the cavity seat 1, a fluid channel 3 on one side of the cavity 2, and a hollow chamber 4 inside the cavity 2.

[0030] In this embodiment, the cavity 2 is provided with an inlet 301 and an outlet 303 that communicate with the fluid channel 3. The inlet 301 and the outlet 303 are respectively located at both ends of the cavity 2, so that the acid solution enters the fluid channel 3 through the inlet 301, mixes, and then flows out through the outlet 303.

[0031] In this embodiment, the fluid channel 3 is Y-shaped and has a mixing aperture 302 in the middle. The cross-sectional size of the fluid channel 3 gradually increases along the direction away from the mixing aperture 302. The narrow mixing aperture 302 controls the position where the reaction begins to occur at a certain depth, while limiting the amount of acid mixed. The sealing block 202 is set along the outer edge of the fluid channel 3 to avoid acid leakage and ensure the stability and safety of the micro mixer.

[0032] In this embodiment, a number of arc-shaped plates 304 are provided in the fluid channel 3. The notches of the arc-shaped plates 304 are arranged in the direction of the drain port 303. When the acid flows, it passes through the arc-shaped plates 304 with the opening facing downward, so that the two acids are continuously split, mixed and formed turbulence in the mixing area, avoiding the concentrated reaction of the acid and violent exothermic reaction, while extending the residence time so that the acid is better mixed.

[0033] In this embodiment, a recessed groove 101 matching the shape of the fluid channel 3 is provided on the side of the cavity 2 near the cavity seat 1, and a sliding groove 102 is provided at its bottom. A limiting block 201 is fixedly provided on the side of the bottom of the cavity 2 away from the fluid channel 3. During installation, the limiting block 201 is slidably connected in the sliding groove 102, which plays a guiding role in the installation, making it easier for the operator to position and install, and ensuring the assembly accuracy of the cavity seat 1 and the cavity 2.

[0034] In this embodiment, the cavity seat 1 is made of a heat-insulating material, either ceramic or polymer. The aforementioned material has good corrosion resistance, which makes the micro mixer more corrosion resistant and thus effectively ensures its use. The chamber 4 is filled with coolant to absorb the heat released during acid mixing. The heat-insulating cavity seat 1 covers the cavity 2 to prevent burns to the operator.

[0035] In this embodiment, the cavity seat 1 and the cavity body 2 are detachably connected by screws 7 and nuts 8. The cavity seat 1 and the fixing blocks 5 located at the four corners of the cavity body 2 are respectively provided with threaded holes 6 that mate with the screws 7. During installation, the screws 7 pass through the threaded holes 6, ensuring that after the cavity seat 1 and the cavity body 2 are assembled, the nuts 8 are installed to securely connect the overall structure. After use, reaction products accumulate on the inner wall of the fluid channel 3, and the interior of the fluid channel 3 can be cleaned by disassembling the screws 7 and nuts 8.

[0036] Working principle: Before use, the chamber 4, which contains coolant and has good thermal conductivity, is subjected to low-temperature treatment. The limiting block 201 slides into the slide groove 102, guiding the chamber 2 to fit against the chamber seat 1. The sealing block 202 on the edge of the fluid channel 3 contacts the inner wall of the recessed groove 101 to prevent acid leakage. After the installation nut 8 secures the overall structure, a fixed amount of the two acids is injected into the inlet 301. The cross-sectional dimension of the fluid channel 3 gradually increases along the direction away from the mixing aperture 302. The narrow mixing aperture 302 controls the starting point of the reaction at a certain depth, while limiting the mixing of the acids. The combined volume continues to flow downwards through the downward-facing arc-shaped plate 304, causing the two acids to be continuously split, mixed, and turbulent within the mixing area. This prevents the concentrated acid reaction from releasing intense heat and extends the residence time, allowing for better mixing of the acids. The heat released during mixing is gently absorbed by the coolant in chamber 4. The mixed liquid flows out from the drain port 303 and is collected. After the mixed acid preparation is completed, a small amount of liquid remains on the inner wall of the fluid channel 3. To prevent residual liquid from affecting the next preparation and to ensure the fluid channel 3 is in good condition, the equipment is cleaned and maintained by disassembling screws 7 and nuts 8.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A micromixer for preparing mixed acid for water quality testing, comprising a cavity seat (1), characterized in that: A cavity (2) is provided on one side of the cavity seat (1), a fluid channel (3) is provided on one side of the cavity (2), and a hollow chamber (4) is provided inside it. The cavity (2) has a recessed groove (101) that matches the shape of the fluid channel (3) on the side near the cavity seat (1), and a sliding groove (102) is provided at its bottom. A limiting block (201) is fixedly provided on the bottom of the cavity (2) away from the fluid channel (3), and the limiting block (201) is slidably connected in the groove (102); The chamber (4) is filled with coolant to absorb the heat released when the acid solution is mixed; The cavity seat (1) and the cavity (2) are detachably connected by screws (7) and nuts (8). The cavity seat (1) and the fixing blocks (5) located at the four corners of the cavity (2) are respectively provided with threaded holes (6) that cooperate with the screws (7).

2. The micromixer for preparing mixed acid for water quality testing according to claim 1, characterized in that: The cavity (2) is provided with an inlet (301) and an outlet (303) that communicate with the fluid channel (3). The inlet (301) and the outlet (303) are respectively located at both ends of the cavity (2), so that the acid solution enters the fluid channel (3) through the inlet (301), mixes, and then flows out through the outlet (303).

3. The micromixer for preparing mixed acid for water quality testing according to claim 2, characterized in that: The fluid channel (3) is Y-shaped and has a mixing gap (302) in the middle section. The cross-sectional dimensions of the fluid channel (3) gradually increase in the direction away from the mixing gap (302). The fluid channel (3) has a long strip-shaped sealing block (202) along its edge.

4. The micromixer for preparing mixed acid for water quality testing according to claim 2, characterized in that: The fluid channel (3) is provided with a number of arc-shaped plates (304), and the notches of the arc-shaped plates (304) are arranged in the direction of the drain port (303).

5. The micromixer for preparing mixed acid for water quality testing according to claim 1, characterized in that: The cavity seat (1) is made of a thermal insulation material, either ceramic or polymer.

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