Experimental equipment for chemical reduction of nitrate in seawater

Abstract

The experimental equipment for chemically reducing nitrates in seawater claimed in this application includes a storage container, a dosing tray, a reaction flask, a stirring mechanism, a sealing and opening / closing mechanism, and a power pump. The experimental equipment can quantitatively add zinc granules stored in the storage container into the reaction flask using the dosing tray, quantitatively inject seawater into the reaction flask using the power pump, then stir the seawater and zinc granules with a stirring rod, then quantitatively extract the sample solution obtained after the reaction using the power pump, and finally, automatically clean the reaction flask with the stirring rod. In this way, the fully automated operation of the nitrate reduction process in seawater can be realized, which not only improves the extraction efficiency of chemically reducing nitrates in seawater, but also ensures the consistency of data after multiple extractions.

Description

Technical Field

[0001] The present invention belongs to the technical field related to experimental equipment, and particularly relates to an experimental equipment for chemical reduction of nitrate in seawater. Background Art

[0002] The chemical reduction of nitrate (NO3⁻) in seawater refers to the process of converting nitrate into nitrogen gas (N2) or other nitrogen compounds with lower oxidation states (such as NO2⁻, NH4⁺, etc.) through chemical methods. This process is of great significance in the fields of environmental remediation (such as treatment of water eutrophication) and industrial wastewater treatment.

[0003] The determination of nitrate nitrogen in seawater usually adopts the zinc coil reduction method (refer to the national standard "GB / T 12763.4 - 2007.11"). Its core principle is to use metallic zinc to reduce nitrate (NO3⁻) to nitrite (NO2⁻) under acidic conditions and then perform colorimetric determination. Specifically, a barrel-shaped zinc coil with a diameter of 1.5 cm is placed in a conical flask to react with seawater. Since the mouth of the conical flask is usually less than 3 cm, the zinc coil needs to be placed vertically. After the reaction is completed, it needs to be quickly taken out. Otherwise, it may lead to over-reduction or side reactions, affecting the accuracy of the determination. This not only makes the operation cumbersome and inefficient but also has problems with poor consistency. Summary of the Invention

[0004] In view of this, it is necessary to provide an experimental equipment for chemical reduction of nitrate in seawater to solve the above technical problems.

[0005] An experimental equipment for chemical reduction of nitrate in seawater, the experimental equipment includes:

[0006] A storage container for storing and discharging zinc particles downward;

[0007] A quantitative disk is arranged at the lower position of the storage container in the vertical direction and is communicated with the storage container, and the quantitative disk can receive the zinc particles discharged from the storage container in a quantitative manner;

[0008] A reaction flask is arranged at the lower position of the quantitative disk in the vertical direction and is communicated with the quantitative disk, and the reaction flask can receive the zinc particles discharged from the quantitative disk. The reaction flask has a discharge port;

[0009] A stirring mechanism includes a hollow motor and a stirring rod. The stirring rod passes through the hollow motor, and one end of the stirring rod extending downward from the hollow motor is inserted into the reaction flask. Among them, the stirring rod is configured as a hollow tubular structure;

[0010] A cleaning pump is communicated with one end of the stirring rod extending upward from the hollow motor for providing clear water to the stirring rod;

[0011] A sealing opening and closing mechanism, comprising an opening and closing driving member and a sealing body, wherein the sealing body is drivingly connected to the opening and closing driving member, and the sealing body can make a reciprocating motion relative to the lower discharge port under the driving of the opening and closing driving member, so as to control the opening / closing of the lower discharge port;

[0012] A power pump is connected to the reaction bottle, and the power pump can quantitatively deliver seawater to the reaction bottle, and the power pump can also quantitatively extract a sample solution from the reaction bottle, wherein the sample solution is a solution obtained after the seawater reacts with the zinc particles.

[0013] It can be understood that the zinc particles stored in the storage container are quantitatively added to the reaction bottle using a quantitative disk, the seawater is quantitatively injected into the reaction bottle using a power pump, the seawater and the zinc particles are stirred using a stirring rod, and then the sample solution obtained after the reaction is quantitatively extracted using a power pump. Finally, the stirring rod can also be used to automatically clean the reaction bottle. This can achieve fully automated operation of the chemical reduction process of nitrate in seawater, which not only improves the extraction efficiency of the chemical reduction of nitrate in seawater, but also ensures the consistency of data after multiple extractions.

[0014] In one embodiment, the quantitative disk comprises:

[0015] The disc body comprises a bottom plate, a top plate arranged opposite to the bottom plate, and a side panel for connecting the bottom plate and the top plate, wherein the bottom plate, the side panel and the top plate are enclosed together to form a receiving cavity, wherein the bottom plate is divided into a transition portion and an oblique portion along the circumferential direction of the side panel, and the oblique portion is arranged below the transition portion in the vertical direction;

[0016] A discharge pipe is arranged at the position of the oblique opening and communicated with the accommodating cavity, and the discharge pipe is downwardly communicated with the reaction bottle;

[0017] A feed pipe is disposed on a portion of the top plate facing the transition portion and communicated with the accommodating cavity, and the feed pipe is upwardly communicated with the storage container;

[0018] A driving rod group is arranged in the accommodating cavity and is rotatably connected to the bottom plate, the rotation center of the driving rod group is arranged on the center of the bottom plate, and a preset gap is formed between the end of the driving rod group and the side panel in the extension direction of the driving rod group, and the size of the preset gap is smaller than the outer diameter of the zinc particles;

[0019] The rotary driving member is transmission-connected with the driving rod group and is used for driving the driving rod group to rotate on the bottom plate.

[0020] It can be understood that the quantitative feeding of the quantitative tray is controlled by using the driving rod group to push the zinc particles on the transition part of the bottom plate, which can simplify the structure of the quantitative tray and improve the reliability of the operation of the quantitative tray.

[0021] In one embodiment, the driving rod group includes:

[0022] A main driving rod, comprising a main rod portion, a first bending portion and a second bending portion, wherein the first bending portion and the second bending portion are arranged on both sides of the main rod portion in a vertical direction and are vertically connected to the main rod portion, and the first bending portion and the second bending portion are arranged on both sides of the main rod portion in a width direction of the main rod portion;

[0023] A first sub-driving rod is disposed above the main rod in the vertical direction, and the first sub-driving rod is accommodated in the area where the thickness of the first bending portion is located;

[0024] A second sub-driving rod is disposed below the main rod in the vertical direction, and the second sub-driving rod is accommodated in the area where the thickness of the second bending portion is located;

[0025] Wherein, the main driving rod, the first sub-driving rod and the second sub-driving rod are independently arranged with each other, and are respectively connected to one of the rotating driving components in a transmission manner.

[0026] It can be understood that, by utilizing the mutual cooperation between the main driving rod, the first sub-driving rod and the second sub-driving rod, the downward discharge control of zinc particles with different quantitative quantities of the quantitative disk can be achieved.

[0027] In one embodiment, when the sealing body closes the lower outlet, the opening of one end of the stirring rod inserted into the reaction bottle is arranged opposite to the sealing body, and the clean water discharged from the stirring rod through the opening can clean the sealing body.

[0028] In one embodiment, a spray port is provided on the stirring rod at a position located inside the reaction bottle, and the clean water discharged from the stirring rod through the spray port can be used to clean the inner wall of the reaction bottle.

[0029] In one embodiment, the stirring rod is connected to a stirring blade, the stirring blade is arranged on a portion of the stirring rod located inside the reaction bottle, and the stirring rod can stir the material in the reaction bottle through the stirring blade.

[0030] It can be understood that stirring the materials in the reaction bottle by using stirring blades can promote the chemical reaction between the zinc particles and the nitrate in the seawater, thereby shortening the reaction time and further improving the extraction efficiency of the chemical reduction of nitrate in the seawater.

[0031] In one embodiment, the sealing and opening / closing mechanism further includes a swing seat which is rotatably arranged relative to the reaction flask and connected to the sealing body for carrying the sealing body.

[0032] The opening / closing driving member is configured as an electric push rod, and the telescopic rod of the electric push rod is hinged to the swing seat for driving the swing seat to rotate relative to the reaction flask.

[0033] It can be understood that the waste collection box and the filter screen can automatically classify and collect the zinc particles and waste liquid discharged from the lower part of the reaction flask, facilitating the subsequent centralized treatment of the waste.

[0034] In one embodiment, the experimental equipment further includes a multi-way valve which is communicated with the power pump for switching the connection path when the power pump works.

[0035] It can be understood that by switching the connection path on the power pump using the multi-way valve, the experimental equipment can complete the functions of quantitatively injecting seawater and quantitatively extracting the sample solution with one power pump, playing the role of simplifying the structure and reducing the cost.

[0036] In one embodiment, the experimental equipment further includes a flow pump which is communicated with the reaction flask for injecting a quantitative cadmium chloride reagent into the reaction flask.

[0037] It can be understood that injecting a quantitative cadmium chloride reagent into the reaction flask using the flow pump enables the cadmium chloride reagent to act as a catalyst for the reaction between zinc particles and nitrate in seawater, further enhancing the extraction efficiency of the chemical reduction of nitrate in seawater.

[0038] In one embodiment, the experimental equipment further includes a waste collection box which is arranged at the lower position of the reaction flask in the vertical direction for carrying the waste discharged from the lower discharge port of the reaction flask.

[0039] Wherein, a filter screen is arranged on the waste collection box, and the filter screen can separate out the zinc particles contained in the waste.

[0040] Due to the application of the above technical solutions, the present invention has the following advantages compared with the prior art:

[0041] The experimental equipment for chemical reduction of nitrate in seawater protected by this application quantitatively adds zinc particles stored in a storage container into a reaction flask using a dosing tray, quantitatively injects seawater into the reaction flask using a power pump, then stirs the seawater and zinc particles using a stirring rod, and then quantitatively extracts the sample solution obtained after the reaction using a power pump. Finally, the reaction flask is automatically cleaned using a stirring rod. In this way, the fully automated operation of the chemical reduction process of nitrate in seawater can be achieved, which not only improves the extraction efficiency of chemical reduction of nitrate in seawater, but also ensures the consistency of data after multiple extractions. Description of the Drawings

[0042] In order to more clearly illustrate the technical solutions in the embodiments of this application or in the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of this application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0043] Figure 1 It is a schematic structural diagram of the experimental equipment provided by this application.

[0044] Figure 2 It is a top view of the dosing tray in this application.

[0045] Figure 3 It is a side view of the dosing tray in this application.

[0046] Figure 4 It is a cross-sectional view of the material driving rod group assembled in the disc body in this application.

[0047] Figure 5 It is a partial cross-sectional view of the rotary driving part and the material driving rod group assembled in this application.

[0048] Figure 6 It is a partial cross-sectional view of the main material driving rod and the sub-material driving rod assembled in this application.

[0049] Figure 7 It is a cross-sectional view of the stirring mechanism, the inclined pump and the reaction flask assembled in this application.

[0050] Reference numerals: 100, experimental equipment; 110, main frame; 111, connecting bracket; 10, storage container; 20, metering tray; 21, disc body; 201, accommodating cavity; 211, bottom plate; 2111, transition part; 2112, beveled opening; 2113, inclined surface; 2114, flat surface; 2115, stepped surface; 212, top plate; 213, side enclosure; 22, discharge pipe; 23, feed pipe; 24, material driving rod group; 241, main material driving rod; 2411, main rod part; 2412, first bending part; 2413, second bending part; 242, first sub-material driving rod; 243, second sub-material driving rod; 25, rotary driving member; 251, main rotating shaft; 252, inner rotating shaft; 253, outer rotating shaft; 30, reaction flask; 31, lower discharge port; 32, bottle cap; 40, stirring mechanism; 41, hollow motor; 42, stirring rod; 420, cleaning pump; 421, opening; 422, spraying port; 43, stirring blades; 50, sealing and opening / closing mechanism; 51, opening / closing driving member; 52, sealing body; 53, swing seat; 60, power pump; 70, flow pump; 80, multi-way valve; 90, waste collection box; 91, filter screen. Detailed implementation manners

[0051] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0052] It should be noted that when an element is referred to as being "provided on" another element, it can be directly provided on the other element or there may also be an intermediate element. When an element is considered to be "provided on" another element, it can be directly provided on the other element or there may be an intermediate element at the same time. When an element is considered to be "fixed to" another element, it can be directly fixed to the other element or there may be an intermediate element at the same time.

[0053] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those of ordinary skill in the technical field to which this invention belongs. The terms used in the description of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0054] Such as Figure 1 、 Figure 7As shown, the experimental equipment 100 for chemical reduction of nitrate in seawater provided by the present application includes a storage container 10, a quantitative disk 20, a reaction bottle 30, a stirring mechanism 40, a cleaning pump 420, a sealing opening and closing mechanism 50 and a power pump 60. The storage container 10 is used to store zinc particles discharged under ice (not shown); the quantitative disk 20 is arranged at a lower position of the storage container 10 in the vertical direction Y and is connected to the storage container 10, and the quantitative disk 20 can receive the zinc particles discharged from the storage container 10 in a quantitative manner; the reaction bottle 30 is arranged at a lower position of the quantitative disk 20 in the vertical direction Y and is connected to the quantitative disk 20, and the reaction bottle 30 can receive the zinc particles discharged from the quantitative disk 20, and the reaction bottle 30 has a lower discharge port 31; the stirring mechanism 40 includes a hollow motor 41 and a stirring rod 42, and the stirring rod 42 penetrates the hollow motor 41 is set; and the stirring rod 42 extends downward from one end of the hollow motor 41 and is inserted into the reaction bottle 30, wherein the stirring rod 42 is configured as a hollow tubular structure; the cleaning pump 420 is connected to the end of the stirring rod 42 extending from the hollow motor 41, and is used to provide clean water to the stirring rod 42; the sealing opening and closing mechanism 50 includes an opening and closing drive member 51 and a sealing body 52, the sealing body 52 is transmission-connected to the opening and closing drive member 51, and the sealing body 52 can make reciprocating motion relative to the lower discharge port 31 under the drive of the opening and closing drive member 51, and is used to control the opening / closing of the lower discharge port 31; the power pump 60 is connected to the reaction bottle 30, the power pump 60 can quantitatively transport seawater to the reaction bottle 30, and the power pump 60 can also quantitatively extract a sample solution from the reaction bottle 30, and the sample solution is a solution obtained after the reaction of seawater and zinc particles.

[0055] As can be seen from the above, the experimental equipment 100 of the present application uses a quantitative plate 20 to quantitatively add the zinc particles stored in the storage container 10 into the reaction bottle 30, uses a power pump 60 to quantitatively inject seawater into the reaction bottle 30, and then uses a stirring rod 42 to stir the seawater and the zinc particles, and then uses the power pump 60 to quantitatively extract the sample solution obtained after the reaction, and finally, uses the stirring rod 42 to automatically clean the reaction bottle 30, so that the fully automated operation of the chemical reduction process of nitrate in seawater can be achieved, which not only improves the extraction efficiency of the chemical reduction of nitrate in seawater, but also ensures the consistency of data after multiple extractions.

[0056] It should be noted that the storage container 10, the quantitative plate 20 and the reaction bottle 30 of the present application are arranged in sequence in the vertical direction Y, so that the zinc particles stored in the storage container 10 can be quantitatively added to the reaction bottle 30 by the quantitative plate 20 under the action of gravity; when the sealing body 52 opens the lower discharge port 31 of the reaction bottle 30, the waste obtained after the reaction of the zinc particles and seawater in the reaction bottle 30 can also be discharged through the lower discharge port 31 under the action of gravity, and the waste water generated by the cleaning of the reaction bottle 30 can also be automatically discharged through the lower discharge port 31 of the reaction bottle 30.

[0057] likeFigure 2 , Figure 3 As shown in Figure 3 , in one embodiment, the metering disk 20 includes a disk main body 21, a discharge pipe 22, a feed pipe 23, a material driving rod group 24, and a rotation driving member 25. The disk main body 21 includes a bottom plate 211, a top plate 212 disposed opposite to the bottom plate 211, and a side enclosure plate 213 for connecting the bottom plate 211 and the top plate 212. A receiving cavity 201 is formed by enclosing the bottom plate 211, the side enclosure plate 213, and the top plate 212 together. Among them, the bottom plate 211 is divided into a transition portion 2111 and an inclined opening portion 2112 along the circumferential direction of the side enclosure plate 213, and the inclined opening portion 2112 is disposed at a position below the transition portion 2111 in the vertical direction Y. The discharge pipe 22 is disposed at the position of the inclined opening portion 2112 and is communicated with the receiving cavity 201, and the discharge pipe 22 is communicated downward with the reaction flask 30. The feed pipe 23 is disposed on the part of the top plate 212 opposite to the transition portion 2111 and is communicated with the receiving cavity 201, and the feed pipe 23 is communicated upward with the storage container 10. The material driving rod group 24 is disposed in the receiving cavity 201 and is rotatably connected to the bottom plate 211. The rotation center of the material driving rod group 24 is disposed at the center of the bottom plate 211, and a preset gap is formed between the end of the material driving rod group 24 and the side enclosure plate 213 in the extending direction of the material driving rod group 24. The size of the preset gap is smaller than the outer diameter of the zinc particles. The rotation driving member 25 is in transmission connection with the material driving rod group 24 and is used to drive the material driving rod group 24 to rotate on the bottom plate 211. That is to say, the metering disk 20 can control the metering and discharging of the metering disk 20 by the rotation driving member 25 to push the zinc particles on the transition portion 2111 of the bottom plate 211 by the material driving rod group 24, which can simplify the structure of the metering disk 20 and improve the working reliability of the metering disk 20. Here, the zinc particles are configured as a spherical structure, so that the zinc particles can move from the transition portion 2111 of the bottom plate 211 to the inclined opening portion 2112 under the pushing of the material driving rod group 24, and then fall from the inclined opening portion 2112 of the bottom plate 211 to the discharge pipe 22 and be discharged under the gravity of the zinc particles themselves. It should be noted that the above rotation driving member 25 is specifically configured as a motor or other mechanical power structures that can improve the rotation driving force, and will not be elaborated here. It can be understood that in other embodiments, a weighing switch can also be disposed below the metering disk 20, and the weighing of the metering disk 20 by the weighing switch is used to realize the quantitative control of the zinc particles in the metering disk 20, and a cut-off valve is disposed in the storage container 10 to control the downward discharge of the zinc particles.

[0058] It should be noted that the dosing tray 20 in this embodiment can control the heights of the side enclosure plate 213 and the feed pipe 23, so that once there are zinc particles at the lower outlet of the feed pipe 23, the zinc particles can be used to squeeze the material in the feed pipe 23, and the automatic blocking of the downward discharge of the zinc material in the storage container 10 can be achieved; furthermore, by the structural arrangement of the material driving rod group 24 on the bottom plate 211, the number of zinc materials that the bottom plate 211 of the disc main body 21 can carry at one time can only be spread in a single layer over an area of half a circle of the bottom plate 211. When the dosing tray 20 discharges zinc particles to the reaction flask 30, the material driving rod group 24 can be used to push the zinc particles towards the inclined mouth 2112 and discharge the material when rotating on the bottom plate 211, so as to achieve the purpose of accurately controlling the dosing amount of zinc particles by the dosing tray 20.

[0059] As Figure 2 , Figure 3 shown, in this embodiment, the inclined mouth 2112 is configured as a fan-shaped structure of a quarter circle. Among them, one side of the inclined mouth 2112 is connected to the transition part 2111 through an inclined surface 2113, and the other side of the inclined mouth 2112 is connected to the transition part 2111 through a flat surface 2114. The discharge pipe 22 is arranged at the position of the flat surface 2114, and a step surface 2115 is formed at the connecting part of the flat surface 2114 and the transition part 2111. The step surface 2115 is used to block the zinc particles entering the inclined mouth 2112, so as to ensure that all the zinc particles entering the inclined mouth 2112 can be discharged through the discharge pipe 22.

[0060] As Figure 4As shown, in one embodiment, the material driving rod group 24 includes a main material driving rod 241, a first sub-material driving rod 242, and a second sub-material driving rod 243. The main material driving rod 241 includes a main rod portion 2411, a first bending portion 2412, and a second bending portion 2413. The first bending portion 2412 and the second bending portion 2413 are disposed on both sides of the main rod portion 2411 in the vertical direction and are perpendicularly connected to the main rod portion 2411. Specifically, the main rod portion 2411, the first bending portion 2412, and the second bending portion 2413 can be connected into an integral structure. Moreover, the first bending portion 2412 and the second bending portion 2413 are disposed on both sides of the main rod portion 2411 in the width direction. The first sub-material driving rod 242 is disposed above the main rod portion 2411 in the vertical direction, and the first sub-material driving rod 242 is received in the region where the thickness of the first bending portion 2412 is located. The second sub-material driving rod 243 is disposed below the main rod portion 2411 in the vertical direction, and the second sub-material driving rod 243 is received in the region where the thickness of the second bending portion 2413 is located. Among them, the main material driving rod 241, the first sub-material driving rod 242, and the second sub-material driving rod 243 are independently arranged from each other, and each is drivingly connected to a rotary driving member 25. Moreover, the rotation centers of the main material driving rod 241, the first sub-material driving rod 242, and the second sub-material driving rod 243 are all disposed at the center of the bottom plate 211. That is to say, the metering disk 20 in this embodiment can realize the discharge control of different metering zinc particles of the metering disk 20 by the mutual cooperation among the main material driving rod 241, the first sub-material driving rod 242, and the second sub-material driving rod 243.

[0061] As Figure 5 , Figure 6 shown, in this embodiment, the main material driving rod 241 can be drivingly connected to the corresponding rotary driving member 25 through a main rotating shaft 251. The first sub-material driving rod 242 can be drivingly connected to the corresponding rotary driving member 25 through an inner rotating shaft 252 disposed inside the main rotating shaft 251 and coaxial with the main rotating shaft 251. The second sub-material driving rod 243 can be drivingly connected to the corresponding rotary driving member 25 through an outer rotating shaft 253 disposed outside the main rotating shaft 251 and coaxial with the main rotating shaft 251. Here, specifically, the main rotating shaft 251, the inner rotating shaft 252, and the outer rotating shaft 253 can be respectively drivingly connected to the corresponding rotary driving members 25 by controlling their different lengths.

[0062] As can be seen from the above, when the metering disk 20 of this embodiment is working, by controlling the operation of the three rotary drive members 25, the main material driving rod 241, the first sub-material driving rod 242, and the second sub-material driving rod 243 can be rotated synchronously to jointly drive the zinc particles on the transition portion 2111; or, by controlling the rotation angles and / or the sequence of rotation of the main material driving rod 241, the first sub-material driving rod 242, and the second sub-material driving rod 243, the zinc particles on the transition portion 2111 of the bottom plate 211 can be driven respectively, so as to achieve the control of the metering disk 20 to quantitatively discharge zinc particles into the reaction flask 30. It should be noted that when the metering disk 20 is working, the number of rotation turns of the above-mentioned main material driving rod 241, the first sub-material driving rod 242, and the second sub-material driving rod 243 is not limited to one turn. In addition, how the main material driving rod 241, the first sub-material driving rod 242, and the second sub-material driving rod 243 cooperate with each other and are jointly used to achieve the discharge of different amounts of zinc particles into the reaction flask 30 when the metering disk 20 is working can be adaptively set according to the usage requirements, and will not be elaborated here.

[0063] As Figure 7 shown, in one embodiment, a bottle cap 32 is detachably connected to the reaction flask 30. By covering the reaction flask 30 with the bottle cap 32, it is possible to prevent the solution from splashing out when the stirring rod 42 stirs the seawater mixed with zinc particles. Here, the bottle cap 32 can be connected to the reaction flask 30 in a threaded manner.

[0064] In this embodiment, a stirring blade 43 is connected to the stirring rod 42. The stirring blade 43 is arranged on the part of the stirring rod 42 located inside the reaction flask 30, and the stirring rod 42 can stir the materials inside the reaction flask 30 through the stirring blade 43. This can promote the reaction between the zinc particles and the nitrate in the seawater, thereby shortening the reaction time between the zinc particles and the nitrate in the seawater, and having the effect of further improving the extraction efficiency of the chemical reduction of nitrate in the seawater. Here, the above-mentioned materials refer to the mixture between seawater and zinc particles.

[0065] As Figure 7 shown, in one embodiment, a spraying port 422 is formed on the part of the stirring rod 42 located inside the reaction flask 30, and the clear water discharged through the spraying port 422 inside the stirring rod 42 can clean the inner peripheral wall of the reaction flask 30. That is to say, the stirring rod 42 can spray clear water on the inner peripheral wall of the reaction flask 30 while rotating, so as to improve the cleaning effect when cleaning the inner peripheral wall of the reaction flask 30.

[0066] In this embodiment, when the seal body 52 closes the lower discharge port 31, the opening 421 at one end of the stirring rod 42 inserted into the reaction flask 30 is disposed opposite to the seal body 52, and the clear water discharged through the opening 421 in the stirring rod 42 can clean the seal body 52. That is to say, the stirring rod 42 can also clean the seal body 52 that plugs the lower discharge port 31 of the reaction flask 30. Here, the material of the seal body 52 is configured as silica gel, rubber, etc. Specifically, the seal body 52 can be configured as a hemispherical structure with a size larger than the lower discharge port 31. By using the elastic deformation of the seal body 52 itself, the sealing performance when the seal body 52 plugs the lower discharge port 31 of the reaction flask 30 can be ensured.

[0067] As Figure 1 shown, in one embodiment, the seal opening and closing mechanism 50 further includes a swing seat 53. The swing seat 53 is rotatably disposed relative to the reaction flask 30 and connected to the seal body 52 for carrying the seal body 52. The opening and closing driving member 51 is configured as an electric push rod, and the telescopic rod of the electric push rod is hinged to the swing seat 53 for driving the swing seat 53 to rotate relative to the reaction flask 30. That is to say, the seal opening and closing mechanism 50 can realize the automation of controlling the opening or closing of the seal body 52 to the upper and lower discharge ports 31 of the reaction flask 30 by controlling the telescopic movement of the telescopic rod on the electric push rod.

[0068] As Figure 1 shown, in this embodiment, the experimental device 100 of this embodiment further includes a main body frame 110. The main body frame 110 is fixedly connected with a connecting bracket 111. The swing seat 53 is rotatably connected to the connecting bracket 111, and the cylinder part of the electric push rod is hinged to the main body frame 110. Here, the experimental device 100 can be assembled with the storage container 10, the quantitative disk 20, the reaction flask 30, the stirring mechanism 40, the seal opening and closing mechanism 50, and the power pump 60 with the main body frame 110 as the installation basis.

[0069] As Figure 1 shown, in one embodiment, the experimental device 100 further includes a flow pump 70. The flow pump 70 is communicated with the reaction flask 30 for supplying a quantitative cadmium chloride reagent to the reaction flask 30. Here, the cadmium chloride reagent can act as a catalyst for the reaction between zinc particles and nitrate in seawater, and has the effect of further improving the extraction efficiency of the chemical reduction of nitrate in seawater.

[0070] As Figure 1As shown, in one embodiment, the experimental device 100 also includes a multi-way valve 80, which is connected to the power pump 60 and is used to switch the connection path when the power pump 60 is working. In this way, the experimental device 100 can use a power pump 60 to complete the functions of quantitative injection of seawater and quantitative extraction of sample solution, which simplifies the structure and reduces the cost. Here, the power pump 60 can be specifically configured as a flow control valve such as a peristaltic pump, a gear pump, a centrifugal pump, etc., and a two-way flow is achieved by controlling the forward and reverse rotation of the motor in the power pump 60, wherein one of the pipes of the power pump 60 is connected to the reaction bottle 30 through a connecting pipe, and another pipe can be connected to a three-way valve with an automatic switching function, one of the passages of the multi-way valve is connected to seawater, and the other pipeline is connected to a test tube, so that the power pump 60 can quantitatively inject seawater into the reaction bottle 30 when working, and quantitatively extract the sample solution obtained after the reaction into the test tube for subsequent testing.

[0071] like Figure 1 As shown, in one embodiment, the experimental equipment 100 also includes a waste collection box 90, which is arranged at the lower position of the reaction bottle 30 in the vertical direction, and is used to carry the waste discharged from the lower discharge port 31 of the reaction bottle 30; wherein, the waste collection box 90 is provided with a filter 91, and the filter 91 can precipitate the zinc particles contained in the waste. In other words, the experimental equipment 100 can automatically classify and collect the zinc particles and waste liquid discharged from the lower discharge port of the reaction bottle 30 by using the waste collection box 90 and the filter 91, so as to facilitate the subsequent centralized treatment of the waste. Here, the above-mentioned waste specifically refers to the zinc particles in the reaction bottle 30 reacting with the nitrate in the seawater within a set time under the catalysis of the cadmium chloride reagent, and all the materials remaining after the sample solution is quantitatively extracted. It should be noted that the waste collection box 90 of the present application can also be used to clean the reaction bottle 30 and the sealing body 52 to obtain the solution.

[0072] As can be seen from the above, when the experimental equipment 100 of the present application is working, the opening and closing driving member 51 first causes the sealing body 52 to block the lower discharge port 31 of the reaction bottle 30, and the power pump 60 starts to inject 25 ml of seawater into the reaction bottle 30, and the quantitative disk 20 quantitatively adds the zinc particles in the storage container 10 into the reaction bottle 30; then, the flow pump 70 starts to inject 0.5 ml of cadmium chloride reagent into the reaction bottle 30, and then, the hollow motor 41 starts to drive the stirring rod 42 to stir, and after the quantitative time, the hollow motor 41 is turned off; then, the power pump 60 starts in reverse to extract 20 ml of sample from the reaction bottle 30, and realizes a one-time extraction of chemical reduction of nitrate in seawater; finally, the cleaning pump 420 starts to clean the inner wall and the sealing body 52 of the reaction bottle 30 through the stirring rod 42.

[0073] The technical features of the above embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered that the scope described in this specification is covered.

[0074] Those of ordinary skill in the art in this technical field should recognize that the above embodiments are only used to illustrate the present invention, rather than to limit the present invention. As long as appropriate changes and variations are made to the above embodiments within the scope of the essential spirit of the present invention, they fall within the scope of protection required by the present invention.

Claims

1. An experimental device for the chemical reduction of nitrate in seawater, characterized in that, The experimental equipment (100) includes: A storage container (10) for storing and discharging zinc particles; a quantitative plate (20), arranged at a position below the storage container (10) in the vertical direction and in communication with the storage container (10), and the quantitative plate (20) is capable of receiving the zinc particles discharged from the bottom of the storage container (10) in a quantitative manner; A reaction bottle (30) is arranged below the quantitative disk (20) in the vertical direction and is in communication with the quantitative disk (20), and the reaction bottle (30) is capable of receiving the zinc particles discharged from the bottom of the quantitative disk (20), and the reaction bottle (30) has a lower discharge port (31); A stirring mechanism (40), comprising a hollow motor (41) and a stirring rod (42), wherein the stirring rod (42) is arranged to penetrate the hollow motor (41), and one end of the stirring rod (42) extends downward from the hollow motor (41) and is inserted into the reaction bottle (30), wherein the stirring rod (42) is configured as a hollow tubular structure; a cleaning pump (420), connected to one end of the stirring rod (42) extending upward from the hollow motor (41), and used for providing clean water to the stirring rod (42); A sealing opening and closing mechanism (50) comprising an opening and closing driving member (51) and a sealing body (52), wherein the sealing body (52) is drivingly connected to the opening and closing driving member (51), and the sealing body (52) is capable of reciprocating relative to the lower discharge port (31) under the driving of the opening and closing driving member (51), so as to control the opening / closing of the lower discharge port (31); A power pump (60) is connected to the reaction bottle (30), and the power pump (60) can quantitatively deliver seawater to the reaction bottle (30), and the power pump (60) can also quantitatively extract a sample solution from the reaction bottle (30), wherein the sample solution is a solution obtained after the seawater reacts with the zinc particles.

2. The experimental equipment for chemical reduction of nitrate in seawater according to claim 1, characterized in that, The quantitative disk (20) comprises: The disc body (21) comprises a bottom plate (211), a top plate (212) arranged relative to the bottom plate (211), and a side panel (213) used to connect the bottom plate (211) and the top plate (212), wherein the bottom plate (211), the side panel (213), and the top plate (212) together enclose a receiving cavity (201), wherein the bottom plate (211) is divided into a transition portion (2111) and an oblique opening portion (2112) along a circumferential direction of the side panel (213), and the oblique opening portion (2112) is arranged below the transition portion (2111) in a vertical direction; a discharge pipe (22), arranged at the position of the oblique opening (2112) and connected to the accommodating chamber (201), and the discharge pipe (22) is downwardly connected to the reaction bottle (30); a feed pipe (23) disposed on a portion of the top plate (212) directly opposite to the transition portion (2111) and connected to the accommodating cavity (201), and the feed pipe (23) is connected upward to the storage container (10); The material driving rod group (24) is arranged in the accommodating cavity (201) and is rotatably connected to the bottom plate (211). The rotation center of the material driving rod group (24) is arranged at the center of the bottom plate (211). Moreover, a preset gap is formed between the end of the material driving rod group (24) and the side enclosure plate (213) in the extending direction of the material driving rod group (24), and the size of the preset gap is smaller than the outer diameter of the zinc particles. The rotation driving member (25) is in transmission connection with the material driving rod group (24) and is used for driving the material driving rod group (24) to rotate on the bottom plate (211).

3. The experimental equipment for chemical reduction of nitrate in seawater according to claim 2, wherein, The material driving rod group (24) includes: The main material driving rod (241) includes a main rod portion (2411), a first bending portion (2412), and a second bending portion (2413). The first bending portion (2412) and the second bending portion (2413) are arranged on both sides of the main rod portion (2411) in the vertical direction and are perpendicularly connected to the main rod portion (2411). Moreover, the first bending portion (2412) and the second bending portion (2413) are arranged on both sides of the main rod portion (2411) in the width direction of the main rod portion (2411). The first sub-material driving rod (242) is arranged above the main rod portion (2411) in the vertical direction, and the first sub-material driving rod (242) is accommodated in the area where the thickness of the first bending portion (2412) is located. The second sub-material driving rod (243) is arranged below the main rod portion (2411) in the vertical direction, and the second sub-material driving rod (243) is accommodated in the area where the thickness of the second bending portion (2413) is located. Wherein, the main material driving rod (241), the first sub-material driving rod (242), and the second sub-material driving rod (243) are independently arranged from each other, and each is in transmission connection with one of the rotation driving members (25).

4. The experimental equipment for chemical reduction of nitrate in seawater according to claim 1, characterized in that, When the sealing body (52) closes the lower discharge port (31), the opening (421) at one end of the stirring rod (42) inserted into the reaction bottle (30) is arranged opposite to the sealing body (52), and the clear water discharged through the opening (421) in the stirring rod (42) can perform a cleaning operation on the sealing body (52).

5. The experimental equipment for chemical reduction of nitrate in seawater according to claim 1, characterized in that, A spraying port (422) is formed in the part of the stirring rod (42) located in the reaction bottle (30), and the clear water discharged through the spraying port (422) in the stirring rod (42) can perform a cleaning operation on the inner peripheral wall of the reaction bottle (30).

6. The experimental equipment for chemical reduction of nitrate in seawater according to claim 1, characterized in that, The stirring rod (42) is connected with stirring blades (43). The stirring blades (43) are arranged on the part of the stirring rod (42) located in the reaction bottle (30), and the stirring rod (42) can stir the materials in the reaction bottle (30) through the stirring blades (43).

7. The experimental equipment for chemical reduction of nitrate in seawater according to claim 1, characterized in that, The sealing and opening / closing mechanism (50) further includes a swing seat (53), which is rotatably arranged relative to the reaction flask (30) and connected to the sealing body (52) for carrying the sealing body (52). The opening / closing driving member (51) is configured as an electric push rod, and the telescopic rod of the electric push rod is hinged to the swing seat (53) for driving the swing seat (53) to rotate relative to the reaction flask (30).

8. The experimental equipment for chemically reducing nitrates in seawater according to claim 1, wherein, The experimental equipment (100) further includes a multi-way valve (80), which is communicated with the power pump (60) for switching the connection path when the power pump (60) is working.

9. The experimental equipment for chemical reduction of nitrate in seawater according to claim 1, characterized in that, The experimental equipment (100) further includes a flow pump (70), which is communicated with the reaction flask (30) for injecting a quantitative cadmium chloride reagent into the reaction flask (30).

10. The experimental equipment for chemical reduction of nitrate in seawater according to claim 1, characterized in that, The experimental equipment (100) further includes a waste collection box (90), which is arranged at the lower position of the reaction flask (30) in the vertical direction for carrying the waste discharged from the lower discharge port (31) of the reaction flask (30). Wherein, a filter screen (91) is arranged on the waste collection box (90), and the filter screen (91) can precipitate the zinc particles contained in the waste.

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