Experimental equipment for chemical reduction of nitrate in seawater

Abstract

The experimental equipment for chemical reduction of nitrate in seawater comprises a storage container, a quantitative disc, a reaction bottle, a stirring mechanism, a sealing opening and closing mechanism and a power pump, according to the experimental equipment, zinc particles stored in the storage container can be quantitatively added into the reaction bottle through the quantitative disc, and seawater is quantitatively injected into the reaction bottle through the power pump; the method comprises the following steps of: adding zinc particles into seawater, stirring the seawater and the zinc particles by using a stirring rod, quantitatively extracting a sample solution obtained after reaction by using a power pump, and automatically cleaning a reaction bottle by using the stirring rod, so that full-automatic operation of the reduction process of the nitrate in the seawater can be realized, the extraction efficiency of chemical reduction of the nitrate in the seawater can be improved, and the operation is simple and convenient. And the consistency of the data after multiple times of extraction is ensured.

Description

Technical Field

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

[0002] Nitrate in seawater (NO 3 Chemical reduction of nitrates is the conversion of nitrates into nitrogen gas (N 2 ) or other low-oxidation nitrogen compounds (such as NO 2 ⁻、NH 4 This process is of great significance in the fields of environmental restoration (such as water eutrophication control) and industrial wastewater treatment.

[0003] The determination of nitrate nitrogen in seawater usually adopts the zinc reduction method (refer to the national standard "GB / T 12763.4-2007.11"), the core principle of which is to use metal zinc to convert nitrate (NO 3 ⁻) is reduced to nitrite (NO 2 ⁻), and then perform colorimetric determination. Specifically, a barrel-shaped zinc roll 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 roll needs to be placed vertically and taken out quickly after the reaction is completed, otherwise it may cause over-reduction or side reactions, affecting the accuracy of the determination. This is not only cumbersome and inefficient, but also has the problem of poor consistency. Summary of the invention

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

[0005] An experimental device for chemical reduction of nitrate in seawater, the experimental device comprising: A storage container for storing and discharging zinc granules; A quantitative tray is disposed below the storage container in the vertical direction and is in communication with the storage container, and the quantitative tray can receive the zinc particles discharged from the lower row of the storage container in a quantitative manner; A reaction bottle is arranged below the quantitative disk in the vertical direction and is connected to the quantitative disk, and the reaction bottle can receive the zinc particles discharged from the bottom of the quantitative disk, and the reaction bottle has a lower discharge port; A stirring mechanism, comprising a hollow motor and a stirring rod, wherein the stirring rod is arranged through the hollow motor, and one end of the stirring rod extends downward from the hollow motor and is inserted into the reaction bottle, wherein the stirring rod is configured as a hollow tubular structure; A cleaning pump, connected to one end of the stirring rod extending upward from the hollow motor, for providing clean water to the stirring rod; 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; 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.

[0006] 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.

[0007] In one embodiment, the quantitative disk comprises: 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; 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; 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; 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; 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.

[0008] 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.

[0009] In one embodiment, the driving rod group includes: 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; 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; 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; 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.

[0010] 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.

[0011] 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.

[0012] 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.

[0013] 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.

[0014] 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.

[0015] In one embodiment, the sealing opening and closing mechanism further includes a swing seat, which is rotatably arranged relative to the reaction bottle and connected to the sealing body, and is used to carry the sealing body; The opening and 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 to drive the swing seat to rotate relative to the reaction bottle.

[0016] It is understandable that the waste collection box and the filter net can be used to automatically classify and collect the zinc particles and waste liquid at the bottom of the reaction bottle, so as to facilitate the subsequent centralized treatment of the waste.

[0017] In one of the embodiments, the experimental equipment further comprises a multi-way valve, which is connected to the power pump and is used to switch the connection path when the power pump is working.

[0018] It can be understood that by using the multi-way valve to switch the connecting passages on the power pump, the experimental equipment can complete the functions of quantitative injection of seawater and quantitative extraction of sample solution with one power pump, which simplifies the structure and reduces costs.

[0019] In one embodiment, the experimental equipment further comprises a flow pump, which is connected to the reaction bottle and is used to inject a quantitative amount of cadmium chloride reagent into the reaction bottle.

[0020] It can be understood that a quantitative amount of cadmium chloride reagent is injected into the reaction bottle using a flow pump, so that the cadmium chloride reagent can act as a catalyst for the reaction between zinc particles and nitrate in seawater, which has the effect of further improving the extraction efficiency of chemical reduction of nitrate in seawater.

[0021] In one embodiment, the experimental equipment further comprises a waste collection box, which is disposed at a lower position of the reaction bottle in a vertical direction and is used to carry waste discharged from a lower discharge port of the reaction bottle; Wherein, the waste collection box is provided with a filter screen, and the filter screen can separate out the zinc particles contained in the waste.

[0022] Due to the application of the above technical solution, the present invention has the following advantages compared with the prior art: The experimental equipment for chemical reduction of nitrate in seawater, to be protected by the present application, uses a quantitative plate to quantitatively add zinc particles stored in a storage container into a reaction bottle, uses a power pump to quantitatively inject seawater into the reaction bottle, then uses a stirring rod to stir the seawater and the zinc particles, and then uses a power pump to quantitatively extract the sample solution obtained after the reaction, and finally, uses the stirring rod to automatically clean the reaction bottle, 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. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the conventional technology, the drawings required for use in the embodiments or the conventional technology descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 This is a schematic diagram of the structure of the experimental equipment provided in this application.

[0025] Figure 2 It is a top view of the quantitative disk in this application.

[0026] Figure 3 It is a side view of the quantitative disk in this application.

[0027] Figure 4 This is a cross-sectional view of the driving rod assembly in the present application when assembled in the disc body.

[0028] Figure 5 It is a partial cross-sectional view of the assembly of the rotary drive member and the driving rod assembly in the present application.

[0029] Figure 6 It is a partial cross-sectional view of the main drive rod and the sub-drive rod during assembly in the present application.

[0030] Figure 7 This is a cross-sectional view of the stirring mechanism, tilting pump and reaction bottle when assembled in this application.

[0031] Figure numerals: 100, experimental equipment; 110, main frame; 111, connecting bracket; 10, storage container; 20, quantitative disk; 21, disk body; 201, accommodating cavity; 211, bottom plate; 2111, transition part; 2112, oblique part; 2113, inclined surface; 2114, plane; 2115, step surface; 212, top plate; 213, side panel; 22, discharge pipe; 23, feed pipe; 24, driving rod group; 241, main driving rod; 2411, main rod part; 2412, first bending part; 2413, second bending part; 242, The first sub-drive rod; 243, the second sub-drive rod; 25, the rotating drive member; 251, the main shaft; 252, the inner shaft; 253, the outer shaft; 30, the reaction bottle; 31, the lower outlet; 32, the bottle cap; 40, the stirring mechanism; 41, the hollow motor; 42, the stirring rod; 420, the cleaning pump; 421, the opening; 422, the spraying port; 43, the stirring blade; 50, the sealing opening and closing mechanism; 51, the opening and closing drive member; 52, the sealing body; 53, the swing seat; 60, the power pump; 70, the flow pump; 80, the multi-way valve; 90, the waste collection box; 91, the filter screen. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0033] It should be noted that when an element is referred to as being "provided on" another element, it may be directly provided on the other element or there may be a central element. When an element is considered to be "provided on" another element, it may be directly provided on the other element or there may be a central element at the same time. When an element is considered to be "fixed to" another element, it may be directly fixed to the other element or there may be a central element at the same time.

[0034] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification 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 related listed items.

[0035] like 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.

[0036] 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.

[0037] 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.

[0038] like Figure 2 , Figure 3 As shown, in one embodiment, the quantitative disk 20 includes a disk body 21, a discharge pipe 22, a feed pipe 23, a driving rod group 24 and a rotating drive member 25, the disk body 21 includes a bottom plate 211, a top plate 212 arranged relative to the bottom plate 211 and a side panel 213 for connecting the bottom plate 211 and the top plate 212, the bottom plate 211, the side panel 213 and the top plate 212 are jointly enclosed to form a accommodating cavity 201; wherein the bottom plate 211 is divided into a transition portion 2111 and an oblique portion 2112 along the circumferential direction of the side panel 213, the oblique portion 2112 is arranged at a position below the transition portion 2111 in the vertical direction Y; the discharge pipe 22 is arranged at the position of the oblique portion 2112 and is aligned with the accommodating cavity 201 The receiving chamber 201 is connected, and the discharge pipe 22 is downwardly connected to the reaction bottle 30; the feed pipe 23 is arranged on the part of the top plate 212 facing the transition part 2111 and is connected to the receiving chamber 201, and the feed pipe 23 is upwardly connected to the storage container 10; the driving rod group 24 is arranged in the receiving chamber 201 and is rotatably connected to the bottom plate 211, and the rotation center of the driving rod group 24 is arranged on the center of the bottom plate 211, and a preset gap is formed between the end of the driving rod group 24 and the side panel 213 in the extension direction of the driving rod group 24, and the size of the preset gap is smaller than the outer diameter of the zinc particles; the rotating drive member 25 is transmission-connected to the driving rod group 24, and is used to drive the driving rod group 24 to rotate on the bottom plate 211. That is to say, the quantitative tray 20 can control the quantitative discharge of the quantitative tray 20 by the rotation drive member 25 pushing the driving rod group 24 on the transition part 2111 of the bottom plate 211, which can simplify the structure of the quantitative tray 20 and improve the reliability of the operation of the quantitative tray 20. Here, the zinc particles are configured as a spherical structure, so that the zinc particles move from the transition part 2111 of the bottom plate 211 to the oblique part 2112 under the pushing of the driving rod group 24, and then fall from the oblique part 2112 of the bottom plate 211 to the discharge pipe 22 under the gravity of the zinc particles themselves. It should be noted that the above-mentioned rotating drive member 25 is specifically configured as a motor, or other mechanical power structure that can increase the rotational driving force, which will not be elaborated here. It can be understood that in other embodiments, a weighing switch can also be set under the quantitative disk 20, and the weighing switch can be used to weigh the quantitative disk 20 to achieve quantitative control of the zinc particles in the quantitative disk 20, and then a stop valve can be set in the storage container 10 to control the downward discharge of the zinc particles.

[0039] It should be noted that the quantitative disk 20 of this embodiment can control the height of the side panels 213 and the feed pipe 23 so that once zinc particles are present at the outlet below the feed pipe 23, the zinc particles can be squeezed out of the feed pipe 23 to achieve automatic blocking of the lower discharge of zinc material in the storage container 10; and then the structural setting of the driving rod group 24 on the bottom plate 211 is used so that the bottom plate 211 of the disc body 21 can only carry a single layer of zinc material to the area of ​​half a circle of the bottom plate 211. When the quantitative disk 20 discharges zinc particles to the reaction bottle 30, the driving rod group 24 can be used to push the zinc particles to the oblique mouth 2112 and discharge the material when rotating on the bottom plate 211, so as to achieve the purpose of accurately controlling the dosage of zinc particles by the quantitative disk 20.

[0040] like Figure 2 , Figure 3 As shown, in this embodiment, the oblique mouth portion 2112 is configured as a quarter-circle fan-shaped structure, wherein one side of the oblique mouth portion 2112 is connected to the transition portion 2111 via an inclined surface 2113, and the other side of the oblique mouth portion 2112 is connected to the transition portion 2111 via a plane 2114, and the discharge pipe 22 is arranged at the position of the plane 2114, and a step surface 2115 is formed at the portion where the plane 2114 and the transition portion 2111 are connected, and the step surface 2115 is used to block the zinc particles entering the oblique mouth portion 2112, thereby ensuring that all the zinc particles entering the oblique mouth portion 2112 can be discharged by the discharge pipe 22.

[0041] like Figure 4As shown, in one embodiment, the driving rod group 24 includes a main driving rod 241, a first sub-driving rod 242 and a second sub-driving rod 243, the main 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 vertically 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 to form an integrated structure; and the first bending portion 2412 and the second bending portion 2413 are arranged on both sides of the width direction of the main rod portion 2411; the first sub-driving rod 242 is arranged on the main rod The main rod 2411 is located at the upper position in the vertical direction, and the first sub-drive rod 242 is accommodated in the area where the thickness of the first bent portion 2412 is located; the second sub-drive rod 243 is arranged at the lower position of the main rod 2411 in the vertical direction, and the second sub-drive rod 243 is accommodated in the area where the thickness of the second bent portion 2413 is located; wherein the main drive rod 241, the first sub-drive rod 242 and the second sub-drive rod 243 are arranged independently of each other, and are respectively connected to a rotating drive member 25 by transmission, and the rotation center of the main drive rod 241, the rotation center of the first sub-drive rod 242 and the rotation center of the second sub-drive rod 243 are all arranged on the center of the bottom plate 211. That is to say, the quantitative disk 20 of this embodiment can realize the lower discharge control of different quantitative zinc particles of the quantitative disk 20 by utilizing the mutual cooperation between the main drive rod 241, the first sub-drive rod 242 and the second sub-drive rod 243.

[0042] like Figure 5 , Figure 6 As shown, in this embodiment, the main driving rod 241 can be connected to the corresponding rotating drive member 25 through the main rotating shaft 251, the first sub-driving rod 242 can be connected to the corresponding rotating drive member 25 through the inner rotating shaft 252 arranged inside the main rotating shaft 251 and coaxially arranged with the main rotating shaft 251, and the second sub-driving rod 243 can be connected to the corresponding rotating drive member 25 through the outer rotating shaft 253 arranged outside the main rotating shaft 251 and coaxially arranged with the main rotating shaft 251. Here, the main rotating shaft 251, the inner rotating shaft 252 and the outer rotating shaft 253 can be controlled to have different lengths to respectively connect to the corresponding rotating drive member 25.

[0043] As can be seen from the above, when the quantitative disk 20 of this embodiment is working, the operation of the three rotating drive parts 25 can be controlled so that the main drive rod 241, the first sub-drive rod 242 and the second sub-drive rod 243 rotate synchronously to jointly realize the driving of the zinc particles on the transition part 2111; or, by controlling the rotation angle and / or rotation sequence of the main drive rod 241, the first sub-drive rod 242 and the second sub-drive rod 243, the driving of the zinc particles on the transition part 2111 of the bottom plate 211 can be realized respectively, so as to achieve the control of the quantitative disk 20 to quantitatively discharge the zinc particles to the reaction bottle 30. It should be noted that, when the quantitative disk 20 is working, the number of rotations of the main drive rod 241, the first sub-drive rod 242 and the second sub-drive rod 243 is not limited to one circle. In addition, how the main drive rod 241, the first sub-drive rod 242 and the second sub-drive rod 243 cooperate with each other and are used together to realize the discharge of different amounts of zinc particles to the reaction bottle 30 when the quantitative disk 20 is working can be adaptively set according to usage requirements, which will not be elaborated here.

[0044] like Figure 7 As shown, in one embodiment, the reaction bottle 30 is detachably connected to a bottle cap 32, and the bottle cap 32 covers the reaction bottle 30 to prevent the solution from splashing when the stirring rod 42 stirs the seawater mixed with zinc particles. Here, the bottle cap 32 can be connected to the reaction bottle 30 in a threaded manner.

[0045] In this embodiment, the stirring rod 42 is connected with a stirring blade 43, which is arranged on the stirring rod 42 at a position inside the reaction bottle 30, and the stirring rod 42 can stir the material inside the reaction bottle 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 has the effect of further improving the extraction efficiency of the chemical reduction of the nitrate in the seawater. Here, the above-mentioned material refers to the mixture between the seawater and the zinc particles.

[0046] like Figure 7 As shown, in one embodiment, a spraying port 422 is provided on the stirring rod 42 at a position disposed inside the reaction bottle 30, and the clean water discharged from the stirring rod 42 through the spraying port 422 can clean the inner peripheral wall of the reaction bottle 30. In other words, the stirring rod 42 can spray clean water on the inner peripheral wall of the reaction bottle 30 while rotating, thereby improving the cleaning effect of the inner peripheral wall of the reaction bottle 30.

[0047] In this embodiment, 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 clean water discharged from the stirring rod 42 through the opening 421 can clean the sealing body 52. ​​In other words, the stirring rod 42 can also clean the sealing body 52 that blocks the lower discharge port 31 of the reaction bottle 30. Here, the material of the sealing body 52 is configured as silica gel, rubber, etc. Specifically, the sealing body 52 can be configured as a hemispherical structure larger than the lower discharge port 31. The elastic deformation of the sealing body 52 itself can ensure the sealing performance when the sealing body 52 blocks the lower discharge port 31 of the reaction bottle 30.

[0048] like Figure 1 As shown, in one embodiment, the sealing opening and closing mechanism 50 further includes a swing seat 53, which is rotatably arranged relative to the reaction bottle 30 and connected to the sealing body 52, and is used to carry the sealing 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 with the swing seat 53, and is used to drive the swing seat 53 to rotate relative to the reaction bottle 30. In other words, the sealing opening and closing mechanism 50 can realize the automation of the opening or closing control of the sealing body 52 to the upper and lower discharge ports 31 of the reaction bottle 30 by controlling the telescopic movement of the telescopic rod on the electric push rod.

[0049] like Figure 1 As shown, in this embodiment, the experimental device 100 of this embodiment further includes a main frame 110, the main frame 110 is fixedly connected to a connecting bracket 111, the swing seat 53 is rotatably connected to the connecting bracket 111, and the cylinder body of the electric push rod is hingedly connected to the main frame 110. Here, the experimental device 100 can use the main frame 110 as an installation basis to realize the assembly of the storage container 10, the quantitative disk 20, the reaction bottle 30, the stirring mechanism 40, the sealing opening and closing mechanism 50 and the power pump 60.

[0050] like Figure 1 As shown, in one embodiment, the experimental device 100 further includes a flow pump 70, which is connected to the reaction bottle 30 and is used to provide a quantitative amount of cadmium chloride reagent to the reaction bottle 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 chemical reduction of nitrate in seawater.

[0051] like 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.

[0052] 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.

[0053] 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.

[0054] The technical features of the above embodiments may be arbitrarily combined. To make the description concise, 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, they should be considered to be within the scope of this specification.

[0055] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present invention, and are not intended to limit the present invention. As long as they are within the spirit of the present invention, appropriate changes and modifications to the above embodiments are within the scope of protection claimed by the present invention.

Claims

1. An experimental device for 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); A 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 driving rod group (24) is arranged at the center of the bottom plate (211), and a preset gap is formed between the end of the driving rod group (24) and the side panel (213) in the extension direction of the driving rod group (24), and the size of the preset gap is smaller than the outer diameter of the zinc particles; The rotary drive member (25) is in driving 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).

3. The experimental equipment for chemical reduction of nitrate in seawater according to claim 2, characterized in that: The driving rod assembly (24) comprises: A main driving rod (241), comprising a main rod portion (2411), a first bending portion (2412) and a second bending portion (2413), wherein the first bending portion (2412) and the second bending portion (2413) are arranged on both sides of the main rod portion (2411) in a vertical direction and are vertically connected to the main rod portion (2411), and the first bending portion (2412) and the second bending portion (2413) are arranged on both sides of the main rod portion (2411) in a width direction of the main rod portion (2411); A first sub-driving rod (242) is arranged above the main rod portion (2411) in the vertical direction, and the first sub-driving rod (242) is accommodated in an area where the thickness of the first bent portion (2412) is located; The second sub-driving rod (243) is arranged below the main rod portion (2411) in the vertical direction, and the second sub-driving rod (243) is accommodated in the area where the thickness of the second bent portion (2413) is located; The main driving rod (241), the first sub-driving rod (242) and the second sub-driving rod (243) are independently arranged and are respectively connected in transmission to one of the rotating 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 clean water discharged from the stirring rod (42) through the opening (421) can clean 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 provided on the stirring rod (42) at a location inside the reaction bottle (30), and clean water discharged from the stirring rod (42) through the spraying port (422) can be used to clean the inner 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 to a stirring blade (43), the stirring blade (43) is arranged on a portion of the stirring rod (42) located inside the reaction bottle (30), and the stirring rod (42) can stir the material inside the reaction bottle (30) through the stirring blade (43).

7. The experimental equipment for chemical reduction of nitrate in seawater according to claim 1, characterized in that: The sealing opening and closing mechanism (50) further comprises a swing seat (53), wherein the swing seat (53) is rotatably arranged relative to the reaction bottle (30) and is connected to the sealing body (52) and is used to support the sealing 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) and is used to drive the swing seat (53) to rotate relative to the reaction bottle (30).

8. The experimental equipment for chemical reduction of nitrate in seawater according to claim 1, characterized in that: The experimental device (100) further comprises a multi-way valve (80), wherein the multi-way valve (80) is in communication with the power pump (60) and is used to switch a connection path when the power pump (60) is in operation.

9. The experimental equipment for chemical reduction of nitrate in seawater according to claim 1, characterized in that: The experimental device (100) further comprises a flow pump (70), wherein the flow pump (70) is connected to the reaction bottle (30) and is used to inject a quantitative amount of cadmium chloride reagent into the reaction bottle (30).

10. The experimental equipment for chemical reduction of nitrate in seawater according to claim 1, characterized in that: The experimental device (100) further comprises a waste collection box (90), wherein the waste collection box (90) is arranged below the reaction bottle (30) in the vertical direction and is used to carry waste discharged from the lower discharge port (31) of the reaction bottle (30); Wherein, a filter screen (91) is provided on the waste collection box (90), and the filter screen (91) is capable of separating out zinc particles contained in the waste.

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