Portable electric heating evaporation-cold atom absorption mercury measuring system

Abstract

The utility model relates to a portable electric heating evaporation-cold atom absorption mercury measuring system which comprises an automatic weighing and sampling device used for weighing a sample; the pre-drying device is used for pre-drying the weighed sample; the reaction device is used for accommodating the pre-dried sample and enabling the sample to react in the reaction device; the enrichment device is used for collecting reaction products discharged by the reaction device and is connected with the reaction device; the detection device is used for detecting reaction products and is connected with the enrichment device; the pre-drying device is positioned behind the reaction device, the enrichment device is positioned on the left side of the reaction device, and the detection device is positioned on the left side of the enrichment device. Compared with the prior art, the portable electric heating evaporation-cold atom absorption mercury measuring system does not need to be externally connected with an electronic balance, meanwhile, the pre-drying function is added, most of water in a liquid sample can be evaporated, damage of water vapor to the service life of a catalyst and gold amalgam is effectively reduced, and the maintenance cost is greatly reduced.

Description

Technical Field

[0001] The utility model relates to rapid detection of environment, in particular to a portable electrothermal evaporation-cold atomic absorption mercury detection system. Background Art

[0002] Mercury is a heavy metal that is highly toxic and widely present in the atmosphere, soil, and food. It easily accumulates in the human body and seriously endangers people's health. It is one of the heavy metal elements currently under key detection.

[0003] Instrumental methods for mercury detection include cold atomic absorption spectrometry, hydride generation-atomic absorption spectrometry, inductively coupled plasma-mass spectrometry, and hydride generation-atomic fluorescence spectrometry. Cold atomic absorption spectrometry can measure the overall mercury content in soil and sediments with a good detection limit. It requires no sample pretreatment and can be directly injected, resulting in high sample detection efficiency, making it widely used.

[0004] The cold atomic absorption spectrometry process includes: introducing the sample into a combustion catalytic furnace, drying, thermal decomposition and catalytic reaction, various forms of mercury are reduced to elemental mercury, and the elemental mercury enters the amalgamation tube to form gold amalgam. The amalgamation tube is rapidly heated to release the mercury in the gold amalgam in the form of vapor. The mercury vapor is carried into the cold atomic absorption spectrophotometer by the carrier gas, and the mercury concentration is calculated based on the degree of attenuation of the light intensity at the characteristic wavelength using the property of mercury vapor to absorb the characteristic spectral line of 253.7nm.

[0005] At present, most of the existing cold atomic absorption mercury measuring instruments do not have the pre-drying function, are large in size, and are not easy to move. That is, samples can only be tested in the laboratory and require an external electronic balance, resulting in the inability to conduct tests in time after on-site sampling. The interval between tests in the laboratory is long, which is prone to errors and cannot meet the needs of on-site sampling and on-site testing. Utility Model Content

[0006] The utility model aims to provide a portable electrothermal evaporation-cold atomic absorption mercury measuring system.

[0007] The portable electrothermal evaporation-cold atomic absorption mercury measurement system of the utility model comprises:

[0008] Automatic weighing and sampling device, used for weighing samples;

[0009] A pre-drying device, used for pre-drying the sample after weighing;

[0010] A reaction device, used to accommodate the pre-dried sample and allow the sample to react therein;

[0011] an enrichment device, used for collecting reaction products discharged from the reaction device, and connected to the reaction device;

[0012] A detection device, used for detecting the reaction products and connected to the enrichment device;

[0013] The automatic weighing and sampling device is located on the right side of the reaction device, the pre-drying device is located behind the reaction device, the enrichment device is located on the left side of the reaction device, and the detection device is located on the left side of the enrichment device.

[0014] The utility model discloses a portable electrothermal evaporation-cold atomic absorption mercury measurement system, wherein the automatic weighing and sampling device includes an X-axis mechanical arm, a Y-axis mechanical arm, a Z-axis mechanical arm, an electronic balance module, a sampling rod, and a sample boat. The Z-axis mechanical arm is used to drive the X-axis mechanical arm and the Y-axis mechanical arm to move up and down, the Y-axis mechanical arm is used to drive the X-axis mechanical arm to move laterally, the X-axis mechanical arm is connected to the sampling rod and is used to drive the sampling rod to move longitudinally, the sampling rod is used to clamp or support the sample boat, and the sample boat is used to hold the sample. The electronic balance module is located on the right side of the reaction device and below the sampling rod, and is used to weigh the sample in the sample boat.

[0015] The utility model discloses a portable electric evaporation-cold atomic absorption mercury detection system, wherein the pre-drying device includes a first metal gas pipe, an exhaust fan, a pre-drying furnace, and a condensation bottle. The exhaust fan is arranged in the pre-drying furnace, and the pre-drying furnace is located behind the reaction device. The pre-drying furnace is connected to the condensation bottle through the first metal gas pipe. The pre-drying furnace is used to preheat the sample, and the exhaust fan is used to blow water vapor into the condensation bottle through the first metal gas pipe.

[0016] The utility model discloses a portable electrothermal evaporation-cold atomic absorption mercury measurement system, wherein the reaction device includes an ashing furnace and a catalytic furnace. The ashing furnace is located to the right of the catalytic furnace and is used to heat the sample. The catalytic furnace is connected to the ashing furnace through a pipeline and is used to catalytically reduce mercury in different forms discharged from the ashing furnace into mercury vapor. The catalytic furnace is connected to the enrichment device.

[0017] The portable electric thermal evaporation-cold atomic absorption mercury measurement system of the present invention further includes an air path device, which includes an air source, a speed regulating valve, a PVC air path pipe, a mass flow meter, a through-plate joint, and a second metal air path pipe. The air source and the speed regulating valve, the speed regulating valve and the mass flow meter, the mass flow meter and the through-plate joint, and the through-plate joint and the second metal air path pipe are all connected via the PVC air path pipe, and the second metal air path pipe extends into the reaction device.

[0018] Compared to existing technologies, this portable electrothermal evaporation-cold atomic absorption mercury measurement system does not require an external electronic balance. Its added pre-drying function evaporates most of the water in liquid samples, effectively reducing the damage to the catalyst and the lifespan of the gold amalgam caused by water vapor and significantly reducing maintenance costs. This portable electrothermal evaporation-cold atomic absorption mercury measurement system is environmentally friendly, safe, and easy to operate, making it highly promising for widespread adoption. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic structural diagram of the portable electrothermal evaporation-cold atomic absorption mercury measurement system of the present invention;

[0020] Figure 2 This is a front view of the structural schematic diagram of the portable electrothermal evaporation-cold atomic absorption mercury detection system of the present invention;

[0021] Figure 3 It is a top view of the structural schematic diagram of the portable electrothermal evaporation-cold atomic absorption mercury detection system of the present utility model;

[0022] Figure 4 This is a left view of the structural schematic diagram of the portable electrothermal evaporation-cold atomic absorption mercury detection system of the present invention. DETAILED DESCRIPTION

[0023] like Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 As shown, the portable electrothermal evaporation-cold atomic absorption mercury measurement system of the utility model comprises:

[0024] Base 100;

[0025] Automatic weighing and sampling device 2, used for weighing samples;

[0026] A pre-drying device 3, used for pre-drying the weighed sample;

[0027] The reaction device 4 is used to accommodate the pre-dried sample and react the sample therein;

[0028] Enrichment device 5, used to collect the reaction products discharged from the reaction device, connected to the reaction device;

[0029] Detection device 6, used for detecting the reaction products, connected to the enrichment device;

[0030] The automatic weighing and sampling device, pre-drying device, reaction device, enrichment device, and detection device are all arranged on the base 100. The automatic weighing and sampling device is located on the right side of the reaction device, the pre-drying device is located behind the reaction device, the enrichment device is located on the left side of the reaction device, and the detection device is located on the left side of the enrichment device.

[0031] The portable electrothermal evaporation-cold atomic absorption mercury measurement system of the present invention comprises an automatic weighing and sampling device 2 comprising an X-axis robotic arm 213, a Y-axis robotic arm 212, a Z-axis robotic arm 211, an electronic balance module 22, a sampling rod 23, and a sample boat 24. The Z-axis robotic arm is disposed on a base 100 and is used to drive the X-axis robotic arm and the Y-axis robotic arm to move up and down. The Y-axis robotic arm is used to drive the X-axis robotic arm to move laterally. The X-axis robotic arm is connected to the sampling rod and is used to drive the sampling rod to move longitudinally. The sampling rod is used to clamp or support the sample boat, which is used to hold the sample. The electronic balance module is located to the right of the reaction device and below the sampling rod and is used to weigh the sample in the sample boat.

[0032] The portable electric evaporation-cold atomic absorption mercury measurement system of the present invention, wherein the pre-drying device 3 includes a first metal gas pipe 31, an exhaust fan 32, a pre-drying furnace 33, and a condensation bottle 34. The exhaust fan is arranged in the pre-drying furnace, and the pre-drying furnace is located behind the reaction device. The pre-drying furnace is connected to the condensation bottle through the first metal gas pipe. The pre-drying furnace is used to preheat the sample, and the exhaust fan is used to blow water vapor into the condensation bottle through the first metal gas pipe.

[0033] The portable electrothermal evaporation-cold atomic absorption mercury measurement system of the present invention comprises a reaction device including an ashing furnace 41 and a catalytic furnace 42. The ashing furnace is located to the right of the catalytic furnace and is used to heat the sample. The catalytic furnace is connected to the ashing furnace through a pipeline and is used to catalytically reduce the different forms of mercury discharged from the ashing furnace into mercury vapor. The catalytic furnace is connected to the enrichment device 5.

[0034] The portable electric thermal evaporation-cold atomic absorption mercury measurement system of the present invention further includes a gas path device 1, which includes a gas source 11, a speed regulating valve 12, a PVC gas path pipe 13, a mass flow meter 14, a through-plate joint 15, and a second metal gas path pipe 16. The gas source and the speed regulating valve, the speed regulating valve and the mass flow meter, the mass flow meter and the through-plate joint, and the through-plate joint and the second metal gas path pipe are all connected by PVC gas path pipes, and the second metal gas path pipe extends into the reaction device.

[0035] The second metal gas pipe extends into the ashing furnace.

[0036] The enrichment device is used to enrich the target, and the detection device is used to detect the target. The enrichment device can be a gold amalgam quartz tube filled with gold-plated quartz sand.

[0037] The portable electrothermal evaporation-cold atomic absorption mercury detection system of the utility model comprises a reaction device, an automatic weighing and sampling device for automatically weighing a sample and feeding it into the reaction device, a pre-drying device for removing water vapor in the sample, an enrichment device for enriching and analyzing a target object, and a detection device for detecting the target object.

[0038] Compared to existing technologies, the portable electrothermal evaporation-cold atomic absorption mercury measurement system of this utility model eliminates the need for additional weighing equipment and can automatically weigh samples, reducing the tedious process of manual weighing. This portable electrothermal evaporation-cold atomic absorption mercury measurement system of this utility model can remove large amounts of water from liquid samples, reducing the impact of water vapor on the catalytic tube and gold amalgam, and extending the service life of the catalytic tube. This portable electrothermal evaporation-cold atomic absorption mercury measurement system of this utility model is environmentally friendly, safe, and convenient, and has great potential for promotion.

[0039] The utility model discloses a portable electrothermal evaporation-cold atomic absorption mercury measurement system, wherein the automatic weighing and sampling device includes an X-axis mechanical arm, a Y-axis mechanical arm, a Z-axis mechanical arm, an electronic balance module, a sampling rod, and a sample boat. The X-axis mechanical arm is located behind the reaction device and above the Y-axis mechanical arm, and can control the forward and backward movement of the sampling rod. The Y-axis mechanical arm is located behind the reaction device, below the X-axis mechanical arm, and above the Z-axis mechanical arm, and can control the left and right movement of the sampling rod. The Z-axis mechanical arm is located behind the reaction device, below the Y-axis mechanical arm, and can control the up and down movement of the sampling rod. The sampling rod is connected to the X-axis mechanical arm, located on the right side of the reaction device, above the electronic balance module, and can be used to clamp or support the sample boat. The sampling rod moves to a certain position according to the movement of the sampling arm. The sample boat is used to hold the sample. The electronic balance module is located on the right side of the reaction device, below the sampling rod, and is used to weigh the sample in the sample boat.

[0040] The utility model discloses a portable electric evaporation-cold atomic absorption mercury measuring system, wherein the pre-drying device includes a first metal gas pipe, an exhaust fan, a pre-drying furnace, and a condensation bottle. The pre-drying furnace is located behind the reaction device, and the exhaust fan is arranged in the pre-drying furnace and located at the upper left of the pre-drying furnace. The front end of the first metal gas pipe is connected to the upper right of the pre-drying furnace, and the rear end is connected to the condensation bottle. The pre-drying furnace is used to perform pre-drying and heating treatment on the sample after weighing, and the exhaust fan is used to blow water vapor into the condensation bottle through the first metal gas pipe.

[0041] The portable electrothermal evaporation-cold atomic absorption mercury measurement system of the present utility model comprises an ashing furnace and a catalytic furnace. The ashing furnace is located on the right side of the catalytic furnace and is used to dry the sample. The catalytic furnace is located on the left side of the ashing furnace and is used to catalytically reduce mercury in different forms into mercury vapor.

[0042] The portable electric thermal evaporation-cold atomic absorption mercury measurement system of the present invention further includes an air path device, which includes an air source, a speed regulating valve, a PVC air path pipe, a mass flow meter, a through-plate joint, and a second metal air path pipe. The air source is located at the right rear of the reaction device. PVC air path pipes are used to connect the air source and the speed regulating valve, the speed regulating valve and the mass flow meter, the mass flow meter and the through-plate joint, and the through-plate joint and the second metal air path pipe. The second metal air path pipe extends into the reaction device.

[0043] The portable electrothermal evaporation-cold atomic absorption mercury measurement system of the present utility model includes a sample introduction device for automatically weighing and feeding samples into a catalytic decomposition furnace, a pre-drying device for removing water vapor from the sample, an enrichment device for enriching and analyzing the target substance, and a detection device for detecting the target substance. Compared with existing technologies, there is no need to purchase additional weighing equipment; samples are automatically weighed, reducing the tedious steps of manual weighing. It can also remove large amounts of water from liquid samples, reducing the impact of water vapor on the catalytic tube and gold amalgam, and extending its lifespan. The portable electrothermal evaporation-cold atomic absorption mercury measurement system of the present utility model is environmentally friendly, safe, and convenient, and has great promotional significance.

[0044] The enrichment device is used to enrich the target, and the detection device is used to detect the target, and is located on the left side of the reaction device.

[0045] The gas circuit device includes a gas source, a speed regulating valve, a PVC gas circuit pipe, a mass flow meter, a through-plate joint, and a second metal gas circuit pipe. The gas circuit device is arranged at the left rear of the automatic weighing and sampling device.

[0046] The pre-drying device includes a first metal air pipe, an exhaust fan, a pre-drying furnace, and a condensation bottle. The pre-drying furnace is located behind the reaction device. The exhaust fan is arranged in the pre-drying furnace and located on the upper left side of the pre-drying furnace. The front end of the first metal air pipe is connected to the upper right side of the pre-drying furnace, and the rear end is connected to the condensation bottle. The pre-drying furnace is used to pre-dry and heat the sample. The exhaust fan is used to blow water vapor into the condensation bottle through the first metal air pipe. Then the robotic arm moves, and the robotic arm drives the sampling rod to lift the sample boat and move it to the reaction device. The pre-drying furnace is arranged behind the automatic weighing sampling device. Of course, it can also be located at other positions that can realize this function.

[0047] The portable electrothermal evaporation-cold atomic absorption mercury detection system of the present invention includes an automatic weighing and sampling device 2, a pre-drying device 3, a reaction device 4, an enrichment device 5, and a detection device 6. The pre-drying device includes a first metal gas pipe 31, an exhaust fan 32, a pre-drying furnace 33, and a condensation bottle 34. The automatic weighing and sampling device includes an injection arm 21, a balance module 22, and an injection rod 23. The reaction device includes an ashing furnace 41 and a catalytic furnace 42. The enrichment device 5 is used to enrich the target object, and the detection device 6 is used to detect the target object.

[0048] The portable electric thermal evaporation-cold atomic absorption mercury measurement system of the present invention further includes a gas path device 1, which includes a gas source 11, a speed regulating valve 12, a PVC gas path pipe 13, a mass flow meter 14, a through-plate joint 15, and a second metal gas path pipe 16. The gas path device is arranged at the left rear of the sampling device. The gas source 11 and the speed regulating valve 12, the speed regulating valve 12 and the mass flow meter 14, the mass flow meter 14 and the through-plate joint 15, and the through-plate joint 15 and the second metal gas path pipe 16 are all connected by PVC gas path pipes. The speed regulating valve is connected to the second metal gas path pipe via a PVC pipe, and the second metal gas path pipe extends into the catalytic combustion device.

[0049] The gas source provides carrier gas, and common carrier gases can be oxygen or nitrogen.

[0050] The portable electric thermal evaporation-cold atomic absorption mercury detection system of the present invention includes a pre-drying device 3, which includes a first metal gas pipe 31, an exhaust fan 32, a pre-drying furnace 33, and a condensation bottle 34 for discharging moisture. The pre-drying furnace 33 is located behind the reaction device 4, and the exhaust fan 32 is arranged in the pre-drying furnace 33 and is located at the upper left of the pre-drying furnace 33. The front end of the first metal gas pipe 31 is connected to the upper right of the pre-drying furnace 33, and the rear end is connected to the condensation bottle 34. The sample boat 24 is moved into the pre-drying furnace 33 by driving the sampling rod 23 through the mechanical arm 21. The pre-drying furnace 33 is heated, and the exhaust fan 32 rotates to blow water vapor into the condensation bottle 34 through the first metal gas pipe 31. Then the mechanical arm 21 moves, and the sampling rod 23 is driven by the mechanical arm 21 to lift the sample boat 24 and move it to the reaction device 4. The pre-drying furnace 33 is arranged behind the automatic weighing sampling device 2. Of course, it can also be located at other positions that can achieve this function.

[0051] The portable electrothermal evaporation-cold atomic absorption mercury measurement system of the present invention comprises an automatic weighing and sampling device 2, which comprises an X-axis mechanical arm 213, a Y-axis mechanical arm 212, a Z-axis mechanical arm 211, an electronic balance module 22, a sampling rod 23, and a sample boat 24. The X-axis mechanical arm 213 is located behind the reaction device and above the Y-axis mechanical arm 212, and can control the forward and backward movement of the sampling rod 23. The Y-axis mechanical arm 212 is located behind the reaction device 4, below the X-axis mechanical arm 213, and above the Z-axis mechanical arm 211, and can control the sampling. The rod 23 moves left and right. The Z-axis robotic arm 211 is located behind the reaction device 4 and below the Y-axis robotic arm 212. It can control the up and down movement of the sample injection rod 23. The sample injection rod 23 is connected to the X-axis robotic arm 213 and is located on the right side of the reaction device 4, above the electronic balance module 22. It can be used to clamp or support the sample boat 24. The sample injection rod 23 moves to a certain position according to the movement of the sampling arm 21. The sample boat 24 is used to hold the sample. The electronic balance module 22 is located on the right side of the reaction device 4, below the sampling rod 23, and is used to weigh the sample in the sample boat 24. The sampling rod 23 is then driven by the robotic arm 21 to lift the sample boat 24 and move it to the ashing furnace 41. The electronic balance module 22 is located on the right side of the reaction device 4, directly below the nozzle of the ashing furnace 41. Of course, it can also be located at other locations that can achieve this function.

[0052] During the operation of the portable electrothermal evaporation-cold atomic absorption mercury measurement system of the utility model:

[0053] The robotic arm 21 moves, driving the injection rod 23 to move the sample boat 24 to the pre-drying furnace 33. The pre-drying furnace 33 is heated, and the exhaust fan 32 rotates to blow water vapor into the condensation bottle 34 through the first metal gas pipe 31. Then the robotic arm 21 moves, driving the injection rod 23 to move the sample boat 24 to the reaction device 4. The sample is dried and catalyzed, and the target product produced is enriched by the enrichment device 5 and then released into the detection device 6 for detection.

[0054] During the operation of the portable electrothermal evaporation-cold atomic absorption mercury measurement system of the utility model:

[0055] The robotic arm 21 moves, driving the injection rod 23 to move the sample boat 24 above the electronic balance module 22. The sample boat 24 is naturally placed on the electronic balance module 22 for weighing, and the data is automatically transmitted to the computer. Then the robotic arm 21 moves, driving the injection rod 23 to move the sample boat 24 into the reaction device 4. The sample is dried and catalyzed, and the target product produced is enriched by the enrichment device 5 and then released into the detection device 6 for detection.

[0056] Compared to existing technologies, this portable electrothermal evaporation-cold atomic absorption mercury measurement system eliminates the need for an external electronic balance and manual data upload. Its added pre-drying function evaporates most of the water in liquid samples, effectively reducing moisture damage to the catalyst and amalgam lifespan, and lowering maintenance costs. This portable electrothermal evaporation-cold atomic absorption mercury measurement system is environmentally friendly, safe, and easy to operate, making it highly promising for widespread adoption.

[0057] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A portable electrothermal evaporation-cold atomic absorption mercury measurement system, characterized in that: include: Automatic weighing and sampling device, used for weighing samples; A pre-drying device, used for pre-drying the sample after weighing; A reaction device, used to accommodate the pre-dried sample and allow the sample to react therein; an enrichment device, used for collecting reaction products discharged from the reaction device, and connected to the reaction device; A detection device, used for detecting the reaction products and connected to the enrichment device; The automatic weighing and sampling device is located on the right side of the reaction device, the pre-drying device is located behind the reaction device, the enrichment device is located on the left side of the reaction device, and the detection device is located on the left side of the enrichment device.

2. The portable electrothermal evaporation-cold atomic absorption mercury measurement system according to claim 1, characterized in that: The automatic weighing and sampling device includes an X-axis robotic arm, a Y-axis robotic arm, a Z-axis robotic arm, an electronic balance module, a sampling rod, and a sample boat. The Z-axis robotic arm is used to drive the X-axis robotic arm and the Y-axis robotic arm to move up and down, the Y-axis robotic arm is used to drive the X-axis robotic arm to move horizontally, the X-axis robotic arm is connected to the sampling rod, and is used to drive the sampling rod to move longitudinally. The sampling rod is used to clamp or support the sample boat, and the sample boat is used to hold samples. The electronic balance module is located on the right side of the reaction device and below the sampling rod, and is used to weigh the sample in the sample boat.

3. The portable electrothermal evaporation-cold atomic absorption mercury measurement system according to claim 2, characterized in that: The pre-drying device includes a first metal air pipe, an exhaust fan, a pre-drying furnace, and a condensation bottle. The exhaust fan is arranged in the pre-drying furnace. The pre-drying furnace is located behind the reaction device. The pre-drying furnace is connected to the condensation bottle through the first metal air pipe. The pre-drying furnace is used to preheat the sample, and the exhaust fan is used to blow water vapor into the condensation bottle through the first metal air pipe.

4. The portable electrothermal evaporation-cold atomic absorption mercury measurement system according to claim 3, characterized in that: The reaction device includes an ashing furnace and a catalytic furnace. The ashing furnace is located on the right side of the catalytic furnace and is used to heat the sample. The catalytic furnace is connected to the ashing furnace through a pipeline and is used to catalytically reduce different forms of mercury discharged from the ashing furnace into mercury vapor. The catalytic furnace is connected to the enrichment device.

5. The portable electrothermal evaporation-cold atomic absorption mercury measurement system according to claim 4, characterized in that: It also includes an air path device, which includes an air source, a speed regulating valve, a PVC air path pipe, a mass flow meter, a through-plate joint, and a second metal air path pipe. The air source and the speed regulating valve, the speed regulating valve and the mass flow meter, the mass flow meter and the through-plate joint, and the through-plate joint and the second metal air path pipe are all connected through the PVC air path pipe, and the second metal air path pipe extends into the reaction device.

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