Pre-digestion device for testing total copper in wastewater

Abstract

The utility model provides a pre-digestion device for testing total copper in waste water, which comprises a pure water storage tank, a medicament storage tank, a digestion solution storage tank and a reaction container, and the top of the reaction container is provided with a first feed port, a second feed port and a third feed port which are of open structures. The first feeding hole, the second feeding hole and the third feeding hole are respectively connected with the pure water storage tank, the medicament storage tank and the digestion solution storage tank; a base is movably arranged at the bottom of the reaction container, a heating mechanism used for heating the reaction container is arranged in the base, and a temperature detection assembly is further arranged on the inner cavity wall of the reaction container. According to the utility model, medicines or water samples do not need to be manually added, so that the operation procedures of workers are reduced and the experiment safety is ensured.

Description

Technical Field

[0001] The utility model belongs to the technical field of wastewater detection, and relates to a pre-digestion device for the total copper test in wastewater. Background Art

[0002] For the total copper test in wastewater, generally, the water sample of the wastewater needs to be digested, color-developed and extracted, and colorimetrically determined. The specific process of water sample digestion is to use acidic reagents to destroy the organic matter and reducing substances in the wastewater to be measured at a certain temperature, so that they become part of the measurable substances. The digestion device is an important component for water sample digestion in the total copper test of wastewater.

[0003] CN216978566U discloses a digestion device for water quality detection, including a box body. A placement plate is arranged in the box body. A plurality of digestion tubes are detachably installed on the placement plate. A heating device for heating the digestion tubes is also arranged on the placement plate. An installation plate located below the placement plate is fixedly connected in the box body. The placement plate is slidably installed on the installation plate. An elastic mechanism for driving the placement plate to move downward is also arranged on the installation plate. A vibration block close to the placement plate is rotatably arranged on the box body. The top surface of the vibration block is inclined. A power component for driving the vibration block to rotate is also arranged on the box body.

[0004] CN206300828U discloses a pre-digestion device before heavy metal detection, including a digester and a digestion pool. The digester is an ultraviolet lamp digester and is installed above the digestion pool. The digester includes a digester housing, an ultraviolet lamp and a diverter. The diverter includes a liquid inlet disc, a plurality of liquid distribution tubes and a liquid outlet disc. The liquid inlet disc is a flat disc shape, and there is a liquid inlet at its top. A plurality of liquid distribution tubes with equal radial diameters extend downward along the bottom edge thereof. The bottom end of each liquid distribution tube is connected to the top of the liquid outlet disc. The shape of the liquid outlet disc is the same as that of the liquid inlet disc, and there is a liquid outlet at its bottom. The liquid outlet is connected to the digestion pool.

[0005] However, when using some existing digestion devices, the remaining amount of liquid in the reactor cannot be accurately controlled, and it is necessary for the operator to observe at all times, consuming a lot of energy. Moreover, during the water sample digestion process, hazardous chemical reagents such as nitric acid and perchloric acid / hydrochloric acid need to be added multiple times, and reagent leakage may also pose a safety risk. Therefore, it is necessary to provide a digestion device that can improve the digestion efficiency and ensure the safety of the operator. Summary of the Utility Model

[0006] Aiming at the deficiencies of the existing technology, the purpose of the utility model is to provide a pre-digestion device for the total copper test in wastewater, which does not require manual addition of drugs or water samples, reduces the operation process of the staff, and ensures the safety of the experiment.

[0007] To achieve this purpose, the utility model adopts the following technical solutions:

[0008] The utility model provides a pre-digestion device for the total copper test in wastewater, including a pure water storage tank, a reagent storage tank and a digestion solution storage tank. The pre-digestion device further includes a reaction vessel. An open-structured first feeding port, a second feeding port and a third feeding port are arranged at the top of the reaction vessel. The first feeding port, the second feeding port and the third feeding port are respectively connected to the pure water storage tank, the reagent storage tank and the digestion solution storage tank. A base is movably arranged at the bottom of the reaction vessel. A heating mechanism for heating the reaction vessel is arranged inside the base, and a temperature detection component is also arranged on the inner cavity wall of the reaction vessel.

[0009] The pre-digestion device of the utility model has a simple structure. The medicine is added through the mutually independent feeding ports, and the feeding ports are of an open structure and not closed. The operation is simple. The temperature inside the reaction vessel can be monitored in real time, so that the staff can master the reaction stage, quickly complete the pre-digestion process, avoid most of the steps that require manual operation, save human resources, ensure the safety of personnel during the reaction process, and also reduce the possibility of misoperation.

[0010] It should be noted that the reagent storage tank in the utility model contains the oxidant required for the total copper test, which can be, for example, a nitric acid solution. The digestion solution storage tank contains the digestion solution necessary for the total copper test, including but not limited to perchloric acid, concentrated sulfuric acid or concentrated hydrochloric acid, and all the above materials are the reagents well-known to those skilled in the art for the total copper test.

[0011] As a preferred technical solution of the utility model, a controller is further arranged inside the base. An operation window and a running switch are arranged on the outer wall of the base. The controller is electrically connected to the operation window, the running switch, the heating mechanism and the temperature detection component respectively, and the running switch is connected to an external power supply.

[0012] A controller is arranged inside the base of the utility model and is electrically connected to the heating mechanism and the temperature detection component respectively to monitor the reaction temperature in real time, automatically record the time required for the temperature to rise, and control the start and stop of the heating mechanism. The operation window is used to adjust the reaction parameters and display the current reaction stage. The running switch is connected to an external power supply and is used to control the start and stop of the whole device.

[0013] As a preferred technical solution of the utility model, the pre-digestion device further includes a first hose, a second hose and a third hose.

[0014] One end of the first hose is connected to the reagent storage tank, and the other end is partially located inside the first feeding port.

[0015] One end of the second hose is connected to the pure water storage tank, and the other end is partially located inside the second feeding port.

[0016] One end of the third hose is connected to the digestion solution storage tank, and the other end is partially located inside the third feeding port.

[0017] As a preferred technical solution of the present utility model, a first driving pump, a second driving pump and a third driving pump are respectively arranged on the first hose, the second hose and the third hose.

[0018] As a preferred technical solution of the present utility model, the controller is also electrically connected to the first driving pump, the second driving pump and the third driving pump respectively.

[0019] The present utility model uses the controller to respectively control the start and stop of the first driving pump, the second driving pump and the third driving pump to automatically add medicine, without manual operation, and can quickly complete pre-digestion, ensuring the safety of personnel during the reaction process.

[0020] As a preferred technical solution of the present utility model, a timing component is also arranged in the controller.

[0021] By setting the timing component, the present utility model can record the time required for the temperature to rise, and preset an interval time for calculating the volume of the liquid in the reaction vessel, so as to master different reaction stages in the reaction vessel.

[0022] As a preferred technical solution of the present utility model, the heating mechanism includes an electric heating plate, and the electric heating plate completely covers the bottom surface of the reaction vessel.

[0023] As a preferred technical solution of the present utility model, a heat-conducting spacer is also arranged between the reaction vessel and the electric heating plate.

[0024] As a preferred technical solution of the present utility model, the reaction vessel has a conical structure.

[0025] It should be noted that the bottom surface of the reaction vessel of the present utility model has a planar structure, which is beneficial to uniform heating, so that the medicine and wastewater in the reaction vessel can fully react.

[0026] As a preferred technical solution of the present utility model, the first feeding port and the third feeding port are respectively located on both sides of the second feeding port.

[0027] The inner diameter of the second feeding port is independently larger than the inner diameters of the first feeding port and the third feeding port.

[0028] In the present utility model, the second feeding port is used to add pure water during the reaction, and before the reaction, a wastewater sample and the materials necessary for the digestion reaction can be added through the second feeding port.

[0029] It should be noted that the inner diameter of the second feeding port being independently greater than the inner diameters of the first and third feeding ports in the present utility model means that the inner diameter of the second feeding port is greater than the inner diameter of the first feeding port and at the same time greater than the inner diameter of the third feeding port, and the inner diameters of the first and third feeding ports may be the same or different, and those skilled in the art can adjust according to the actual situation.

[0030] To help those skilled in the art better understand the overall technical solution and working process of the present utility model, the present utility model exemplarily provides the following specific usage methods of the pre-digestion device, including the following steps:

[0031] (1) Place the base of the pre-digestion device in the laboratory fume hood, connect to the external power supply, and turn on the operation switch;

[0032] (2) Add the wastewater sample to the reaction vessel through the second feeding port and add several zeolites;

[0033] (3) Connect the reaction vessel to the base, confirm that the bottom of the reaction vessel is in full contact with the heating mechanism, and the temperature detection component is in signal connection with the controller in the base;

[0034] (4) Prepare the nitric acid, perchloric acid and pure water required for the experiment;

[0035] (5) Control to turn on the first driving pump, and add nitric acid to the reaction vessel through the first feeding port;

[0036] (6) Control the heating mechanism to start heating. After the temperature detection component detects that the temperature in the reaction vessel reaches the liquid boiling temperature, the heating mechanism stops running. After the liquid cools down to the set temperature, the heating mechanism runs again until it boils again. Record the interval time from the cooling down to the next boiling, repeat several times, and then the heating mechanism stops running, so that the liquid cools down to the set temperature in stages;

[0037] (7) Control to turn on the first driving pump and the third driving pump, add nitric acid to the reaction vessel through the first feeding port, and add perchloric acid to the reaction vessel through the third feeding port;

[0038] (8) Control the heating mechanism to start heating. After the temperature detection component detects that the temperature in the reaction vessel reaches the liquid boiling temperature, the heating mechanism stops running. After the liquid cools down to the set temperature, the heating mechanism runs again until it boils again. Record the interval time from the cooling down to the next boiling, repeat several times, and then the heating mechanism stops running, so that the liquid cools down to the set temperature in stages;

[0039] (9) Control to turn on the second driving pump, add pure water to the reaction vessel through the second feeding port, control the heating mechanism to start heating, and stop heating after the liquid in the reaction vessel reduces to a certain volume, and the reaction ends;

[0040] (10) During the reaction process, the current reaction stage and operating conditions can be understood at any time through the operation window;

[0041] (11) After the sample is cooled, transfer the liquid in the reaction vessel to a volumetric flask and continue the subsequent color development extraction colorimetric experiment.

[0042] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0043] The pre-digestion device for total copper testing in wastewater provided by the present utility model has a simple structure. Medicines are added through independent feeding ports, and the feeding ports are of an open structure without being closed. The operation is simple, and the temperature and operating status in the reaction vessel can be monitored in real time, so that the staff can master the reaction stage and quickly complete the pre-digestion process, avoiding most of the steps that require manual operation, saving human resources, ensuring the safety of personnel during the reaction process, and also reducing the possibility of misoperation. Description of the Drawings

[0044] Figure 1 It is a schematic structural diagram of the pre-digestion device for total copper testing in wastewater provided by a specific embodiment of the present utility model.

[0045] Among them, 1 - reaction vessel; 101 - first feeding port; 102 - second feeding port; 103 - third feeding port; 2 - base; 201 - heating mechanism; 202 - temperature detection component; 203 - operation window; 204 - operation switch; 205 - controller; 3 - first hose; 301 - first driving pump; 4 - second hose; 401 - second driving pump; 5 - third hose; 501 - third driving pump. Specific Embodiment

[0046] It should be understood that in the description of the present utility model, the orientation or positional relationship indicated by the terms "center", "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present utility model. In addition, the terms "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first", "second", etc. may explicitly or implicitly include one or more of such features. In the description of the present utility model, unless otherwise specified, the meaning of "a plurality" is two or more.

[0047] It should be noted that in the description of the present utility model, unless otherwise clearly defined and limited, the terms "set", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0048] Those skilled in the art should understand that the present utility model necessarily includes necessary pipelines, conventional valves, and general pump equipment for realizing the complete process, but the above contents do not belong to the main improvement points of the present utility model. Those skilled in the art can add and arrange them by themselves based on the process flow and equipment structure selection, and the present utility model does not make special requirements and specific limitations on this.

[0049] The technical solution of the present utility model will be further described below with reference to the accompanying drawings and through specific embodiments.

[0050] In a specific embodiment, the present utility model provides a pre-digestion device for the total copper test in wastewater, including a pure water storage tank, a reagent storage tank, a digestion solution storage tank, and a reaction vessel 1. As Figure 1 shown, the top of the reaction vessel 1 is provided with a first feeding port 101, a second feeding port 102, and a third feeding port 103 with an open structure, and the first feeding port 101, the second feeding port 102, and the third feeding port 103 are respectively connected to the pure water storage tank, the reagent storage tank, and the digestion solution storage tank. The bottom of the reaction vessel 1 is movably provided with a base 2, and a heating mechanism 201 for heating the reaction vessel 1 is arranged inside the base 2. A temperature detection component 202 is also arranged on the inner cavity wall of the reaction vessel 1.

[0051] In some embodiments, a controller 206 is further disposed in the base 2. An operation window 203 and an operation switch 204 are disposed on the outer wall of the base 2. The controller 206 is electrically connected to the operation window 203, the operation switch 204, the heating mechanism 201, and the temperature detection component 202 respectively. The operation switch 204 is connected to an external power supply. A controller 206 is disposed in the base 2 of the present utility model and is electrically connected to the heating mechanism 201 and the temperature detection component 202 respectively to automatically record the time required for the temperature to rise and control the start and stop of the heating mechanism 201; the operation window 203 is used to adjust reaction parameters and display the current reaction stage; the operation switch 204 is connected to an external power supply to control the start and stop of the entire device. During application, the controller 206 determines the boiling condition of the liquid according to the temperature change in the reaction vessel 1. Specifically, when the liquid boils, the heater is automatically controlled to stop heating. When the liquid stops boiling, heating continues. The time required for the liquid to boil again is recorded, and the volume of the liquid in the reaction vessel 1 is calculated according to this time. When the liquid volume meets the requirements of a certain reaction stage, the next drug addition process, heating process, or reaction end is executed.

[0052] In some embodiments, the pre-digestion device further includes a first hose 3, a second hose 4, and a third hose 5. One end of the first hose 3 is connected to a reagent storage tank, and the other end is partially located in the first feeding port 101. One end of the second hose 4 is connected to a pure water storage tank, and the other end is partially located in the second feeding port 102. One end of the third hose 5 is connected to a digestion solution storage tank, and the other end is partially located in the third feeding port 103.

[0053] Furthermore, a first driving pump 301, a second driving pump 401, and a third driving pump 501 are respectively disposed on the first hose 3, the second hose 4, and the third hose 5. The controller 206 is also electrically connected to the first driving pump 301, the second driving pump 401, and the third driving pump 501 respectively. The present utility model uses the controller 206 to respectively control the start and stop of the first driving pump 301, the second driving pump 401, and the third driving pump 501 to automatically add drugs without manual drug addition, so as to quickly complete pre-digestion and ensure the safety of personnel during the reaction process.

[0054] In some embodiments, a timing component is further disposed in the controller 206, which can record the time required for the temperature to rise, preset an interval time, and calculate the volume of the liquid in the reaction vessel 1 to master different reaction stages in the reaction vessel 1.

[0055] In some embodiments, the heating mechanism 201 includes an electric heating plate, and the electric heating plate completely covers the bottom surface of the reaction vessel 1.

[0056] Furthermore, a heat-conducting spacer is further disposed between the reaction vessel 1 and the electric heating plate.

[0057] In some embodiments, the reaction vessel 1 has a conical structure, and the bottom surface of the reaction vessel 1 is a planar structure, which is conducive to uniform heating, enabling the medicament and the wastewater in the reaction vessel 1 to react fully.

[0058] Specifically, the first feeding port 101 and the third feeding port 103 are respectively located on both sides of the second feeding port 102. The inner diameter of the second feeding port 102 is independently greater than the inner diameters of the first feeding port 101 and the third feeding port 103. In the present utility model, the second feeding port 102 is used to add pure water during the reaction process, and before the reaction, a wastewater sample and the materials necessary for the digestion reaction can be added through the second feeding port 102.

[0059] In another specific embodiment, the present utility model provides a pre-digestion method for the total copper test in wastewater by using the pre-digestion device in a specific embodiment, which specifically includes the following steps:

[0060] (1) Place the base of the pre-digestion device in the laboratory fume hood, connect to the external power supply, and turn on the operation switch 204;

[0061] (2) Add 50 mL of wastewater sample into the reaction vessel 1 through the second feeding port 102, and add several zeolites;

[0062] (3) Connect the reaction vessel 1 to the base, confirm that the bottom of the reaction vessel 1 is in full contact with the heating mechanism 201, and the temperature detection component 202 is in signal connection with the controller 206 in the base;

[0063] (4) Prepare the nitric acid, perchloric acid and pure water required for the experiment, connect the pure water storage tank to the second feeding port 102 through the second driving pump 401 and the second hose 4, connect the medicament storage tank to the first feeding port 101 through the first driving pump 301 and the first hose 3, and connect the digestion solution storage tank to the third feeding port 103 through the third driving pump 501 and the third hose 5;

[0064] (5) First stage: Control the first driving pump 301 to be turned on, and add 5 mL of nitric acid into the reaction vessel 1 through the first feeding port 101;

[0065] (6) Second stage: Control the heating mechanism 201 to start heating. After the temperature detection component 202 detects that the temperature inside the reaction vessel 1 reaches the liquid boiling temperature, the heating mechanism 201 stops operating. After the liquid cools down to the set temperature, the heating mechanism 201 operates again until it boils again. Record the interval time from the cooling to the second boiling, repeat several times. When the interval time reaches the set time, it is judged that the remaining liquid volume in the reactor vessel is about 10 mL;

[0066] (7) Third stage: The heating mechanism 201 stops operating and the liquid cools down;

[0067] (8) Fourth stage: When the temperature detection component 202 detects that the liquid temperature drops to 60 °C, turn on the first drive pump 301, add 5 mL of nitric acid to the reaction vessel 1 from the first feeding port 101, turn on the third drive pump 501, and add 1 mL of perchloric acid to the reaction vessel 1 from the third feeding port 103;

[0068] (9) Fifth stage: The heating mechanism 201 starts to heat automatically. Its working principle is the same as that of the second stage. When the elapsed time reaches the set time, it is judged that the remaining liquid volume in the reaction vessel 1 is about 5 mL;

[0069] (10) Sixth stage: The heating mechanism 201 stops operating and the liquid cools down;

[0070] (11) Seventh stage: When the temperature detection component 202 detects that the liquid temperature drops to 60 °C, turn on the second drive pump 401, and add 40 mL of pure water to the reaction vessel 1 from the second feeding port 102;

[0071] (12) Eighth stage: The heating mechanism 201 starts to heat automatically. After judging that the liquid reaches the boiling temperature, continue timing for 3 min, or after judging that the remaining liquid volume in the container is less than 10 mL, stop heating and the reaction ends;

[0072] (13) During the reaction process, the current reaction stage and operating status can be understood at any time in the operation window 203;

[0073] (14) After the liquid in the reaction vessel 1 cools down, transfer it to a 50-mL volumetric flask and continue the subsequent color development extraction colorimetric experiment;

[0074] (15) After the experiment, clean the reaction vessel 1, turn off the external power supply, and tidy up the device after the heating mechanism 201 cools down.

[0075] The applicant declares that the above description is only the specific implementation manner of the present utility model, but the protection scope of the present utility model is not limited thereto. Those skilled in the art should understand that any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present utility model fall within the protection scope and the disclosure scope of the present utility model.

Claims

1. A pre-digestion device for the total copper test in wastewater, comprising a pure water storage tank, a reagent storage tank and a digestion solution storage tank, characterized in that, The described pre-digestion device further includes a reaction vessel. An open-structured first feeding port, second feeding port, and third feeding port are provided at the top of the reaction vessel. The first feeding port, second feeding port, and third feeding port are respectively connected to the pure water storage tank, the reagent storage tank, and the digestion solution storage tank. A base is movably arranged at the bottom of the reaction vessel. A heating mechanism for heating the reaction vessel is arranged inside the base, and a temperature detection component is also arranged on the inner cavity wall of the reaction vessel. The described pre-digestion device further includes a first hose, a second hose, and a third hose. One end of the first hose is connected to the reagent storage tank, and the other end is partially located inside the first feeding port. One end of the second hose is connected to the pure water storage tank, and the other end is partially located inside the second feeding port. One end of the third hose is connected to the digestion solution storage tank, and the other end is partially located inside the third feeding port. First driving pumps, second driving pumps, and third driving pumps are respectively arranged on the first hose, the second hose, and the third hose. The controller is also electrically connected to the first driving pump, the second driving pump, and the third driving pump respectively.

2. The pre-digestion device for total copper testing in wastewater according to claim 1, characterized in that, A controller is further arranged inside the base. An operation window and a running switch are arranged on the outer wall of the base. The controller is electrically connected to the operation window, the running switch, the heating mechanism, and the temperature detection component respectively. The running switch is connected to an external power supply.

3. The pre-digestion device for total copper testing in wastewater according to claim 2, characterized in that, A timing component is also arranged inside the controller.

4. The pre-digestion device for total copper testing in wastewater according to claim 1, characterized in that, The heating mechanism includes an electric heating plate, and the electric heating plate completely covers the bottom surface of the reaction vessel.

5. The pre-digestion device for total copper testing in wastewater according to claim 4, characterized in that, A heat-conducting spacer is further arranged between the reaction vessel and the electric heating plate.

6. The pre-digestion device for total copper testing in wastewater according to claim 1, characterized in that, The reaction vessel has a conical structure.

7. The pre-digestion device for total copper testing in wastewater according to claim 6, characterized in that, The first feeding port and the third feeding port are respectively located on both sides of the second feeding port. The inner diameter of the second feeding port is independently larger than the inner diameters of the first feeding port and the third feeding port.

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