CN211262900U

CN211262900U - Sample preparation device for detecting total alpha and total beta radioactivity in water

Info

Publication number: CN211262900U
Application number: CN201921933170.XU
Authority: CN
Inventors: 陈文涛
Original assignee: Qingdao Nuclear First Electronic Technology Co ltd
Current assignee: Qingdao Nuclear First Electronic Technology Co ltd
Priority date: 2019-11-08
Filing date: 2019-11-08
Publication date: 2020-08-14
Anticipated expiration: 2029-11-08

Abstract

The utility model provides a total alpha total beta radioactivity detection system appearance device in water, which comprises a shell, wherein the shell comprises at least one concentrated acid dispelling working cavity and at least one ashing working cavity, a concentrated acid dispelling box is arranged in the concentrated acid dispelling working cavity, and the concentrated acid dispelling box comprises a water sample disc, a water sample disc base, a first microwave heating system and an infrared thermometer, wherein the first microwave heating system and the infrared thermometer are arranged on the side surface; and an ashing box is arranged in the ashing working cavity and comprises a crucible arranged in the ashing working cavity, and a second microwave heating system and a thermocouple thermometer which are arranged on the side surface. The utility model discloses a microwave heating is as the heat source, and the heating is rapid, has reduced the preceding processing time of water sample radioactivity greatly. The structure of the device is integrated with a concentrated acid removing working cavity and an ashing working cavity, wherein the concentrated acid removing working cavity can realize evaporation, acid removing and drying, one cavity has multiple purposes, the whole device can complete four processes of evaporation, concentration, acid removing and ashing required by total alpha total beta radioactivity detection, the use is convenient, and the sample treatment efficiency is high.

Description

Sample preparation device for detecting total alpha and total beta radioactivity in water

Technical Field

The utility model belongs to the technical field of water quality testing, concretely relates to system appearance device that total alpha total beta radioactivity of aquatic detected.

Background

Radionuclides are generated in natural environment and human activities, exist in daily life such as drinking water, and are radioactive sources emitting alpha and beta rays, radioactive pollutants enter human bodies and can damage human tissues, and diseases such as anemia and malignant tumors can be caused finally, so that the determination of the total alpha and beta radioactive concentration in the drinking water is very important.

Because the content of radioactive substances in water is extremely low, in the total alpha and total beta radioactivity detection process of a water quality sample, a large amount of samples need to be enriched for analysis, firstly, evaporation concentration of a water sample needs to be carried out, secondly, acid pickling and salinization with a proper proportion are carried out, and finally, ashing is carried out. At present, an electric heating plate and a water bath are generally adopted in a domestic radiation environment monitoring laboratory to carry out evaporation concentration on a water sample, an evaporation acid-dispelling instrument is adopted to carry out acidification, and then a traditional electric furnace is utilized to carry out ashing. Degree of automation is low, wastes time and energy moreover, can't handle 2L water samples a day, and evaporative concentration, acidizing and ashing step need adopt different devices to go on moreover, and equipment cost is high, and the operation is inconvenient.

SUMMERY OF THE UTILITY MODEL

The utility model discloses to current system appearance device inefficiency, need many equipment complex technical problem, provide an aquatic radioactivity detection system appearance device that collects evaporative concentration, acidizing and ashing an organic whole, reduced the preceding processing time of water sample radioactivity greatly.

In order to achieve the above object, the utility model discloses a technical scheme be:

a sample preparation device for detecting total alpha total beta radioactivity in water comprises a shell, wherein the shell is internally divided into at least one concentrated acid dispelling working cavity and at least one ashing working cavity through a partition plate, a concentrated acid dispelling box is arranged in the concentrated acid dispelling working cavity and comprises a water sample plate base, an infrared thermometer and a first microwave heating system, the water sample plate base is arranged in the concentrated acid dispelling box, the first microwave heating system is arranged on the side face of the concentrated acid dispelling box, a water sample plate is placed on the water sample plate base, and polytetrafluoroethylene is coated on the inner wall of the concentrated acid dispelling box; an ashing box is arranged in the ashing working cavity and is made of a polycrystalline mullite fiberboard, and the ashing box comprises a crucible, a thermocouple thermometer and a second microwave heating system, wherein the crucible, the thermocouple thermometer and the second microwave heating system are arranged in the ashing working cavity.

And door bodies are arranged on the concentration acid removing box and the ashing box as the optimal selection, observation windows are arranged on the door bodies, and special microwave illuminating lamps are arranged in the concentration acid removing box and the ashing box.

Preferably, a touch screen is arranged on the housing.

Preferably, the first microwave heating system and the second microwave heating system both comprise an air-cooled magnetron, a waveguide, a seven-blade axial flow fan and a wind direction guide pipe.

Preferably, a weighing sensor is arranged on the water sample tray base.

Preferably, still include the special collet of COD, the special collet of COD includes the support, is provided with the test tube mounting hole of different diameters on the support.

Preferably, the upper part of the concentration acid-dispelling box is provided with an opening, the opening is connected with a ventilation device, and the ventilation device comprises a gas-collecting hood, a ventilation pipe and a fan.

Preferably, a water receiving tray is arranged at the lower part in the box body.

Preferably, the bottom surface of the box body is provided with a horse wheel.

Preferably, the inner wall of the door body is provided with an integrally formed microwave leakage prevention device, the microwave leakage prevention device comprises four frames, and the frames are provided with a plurality of grooves.

Compared with the prior art, the utility model discloses an advantage lies in with positive effect:

the total alpha and total beta radioactivity detection sample preparation device in water adopts microwave heating as a heat source, the heating is rapid, and the pretreatment time of the radioactivity of the water sample is greatly shortened. The structure of the device is integrated with a concentrated acid-dispelling working cavity and an ashing working cavity, wherein the concentrated acid-dispelling working cavity can realize evaporation, acid dispelling and drying, one cavity has multiple purposes, the whole device can complete four processes of evaporation, concentration, acid dispelling and ashing required by the total alpha total beta radioactivity detection concentrated acid-dispelling working cavity, the use is convenient, and the sample treatment efficiency is high.

Drawings

Fig. 1 is a schematic structural view of the sample preparation device of the present invention;

fig. 2 is a schematic structural view of a first microwave heating system of the sample preparation device of the present invention;

fig. 3 is a schematic structural view of a microwave leakage-proof device of the sample preparation device of the present invention;

in the above figures: 1. a housing; 11. a touch screen; 2. concentrating and acid-removing working chamber; 21. concentrating and acid-removing box; 22. a water sample tray base; 23. a water sample tray; 24. a gas-collecting hood; 25. a vent pipe; 3. an ashing working chamber; 31. an ashing box; 32. an illuminating lamp; 33. a door body; 4. an electrical box; 5. a first microwave heating system; 51. an air-cooled magnetron; 52. a wind direction duct; 53. a seven-blade axial flow fan; 54. a waveguide; 6. a special COD collet; 61. a support; 62. a test tube; 7. a microwave leakage preventing device; 71. an inner frame; 72. an outer frame; 8. a water pan; 9. the horse wheel.

Detailed Description

For a better understanding of the present invention, reference is made to the following detailed description taken in conjunction with the accompanying drawings and examples.

Example (b): as shown in fig. 1, a total alpha total beta radioactivity detection sample preparation device in water, includes shell 1, divide into at least one concentration through the baffle in the shell 1 and catch up with sour working chamber 2 and at least one ashing working chamber 3, this embodiment is an ashing working chamber 3 at the top, and the below is two concentration that the structure is the same and catches up with sour working chamber 2, and concentration catches up with sour working chamber 2 lower part residual space and is for installing electronic components's such as controller, circuit board electrical apparatus case 4. The shell 1 is further provided with a touch screen 11, the touch screen 11 is electrically connected with the controller, parameters can be adjusted through the touch screen 11, and time, temperature and the like can be displayed.

Concentrated acid tank 21 is arranged in concentrated acid driving working chamber 2, and concentrated acid driving tank 21 has placed water sample dish 23 including installing square water sample dish base 22 in inside on water sample dish base 22. The water sample disc 23 is cylindrical, can contain 5L water samples at most, can be randomly selected according to the 1-5L capacity of the experimental requirement, and belongs to a special evaporating dish in a microwave-resistant environment. The water sample tray base 22 is made of a polytetrafluoroethylene plate which can resist the temperature of about 130 ℃ and has the thickness of 10mm, and is corrosion-resistant and large in bearing capacity. Be provided with weighing sensor on water sample dish base 22, can directly weigh the sample in the water sample dish 23, weighing sensor connects to the controller outward, can directly show water sample weight through touch-sensitive screen 11, can the evaporation concentration progress of real-time detection water sample.

The inner wall of the concentration acid-removing box 21 is integrally plated with three layers of Teflon to achieve the effects of acid resistance, corrosion resistance, no adhesion of a sample to the wall of the cavity and easiness in cleaning. The upper part of the concentrated acid removing box 21 is provided with an opening, and the opening is connected with a ventilation device which comprises a gas collecting hood 24, a ventilation pipe 25 and a fan. The gas-collecting hood 24 is funnel-shaped, the gas-collecting hood 24 and the ventilation pipe 25 are made of PVC plastic or metal, and when the gas-collecting hood is made of metal, a polytetrafluoroethylene layer needs to be coated inside the device for corrosion prevention. When evaporation concentration is carried out, the concentrated acid removing box can be correctly and timely pumped away by the fan, so that the aim of rapid evaporation is fulfilled. If the acid removing step is carried out, the vent pipe 25 needs to be externally connected with purification equipment to treat the acid gas so as to prevent air pollution. This concentrated acid removal case 21 not only can be used to the evaporation and the concentration of water sample, can directly be used for removing sour, need not to equip in addition special acid removal appearance.

Install first microwave heating system 5 on the lateral wall of concentrated acid-driving case 21, as shown in fig. 2, first microwave heating system 5 includes air-cooled magnetron 51, and the wind channel that constitutes by wind direction pipe 52 is connected to air-cooled magnetron 51 below, and seven leaves axial fan 53 is connected to wind direction pipe 52 one end, is the cooling of air-cooled magnetron 51 by seven leaves axial fan 53 to reach better silence radiating effect, and wind direction pipe 52 is located the below position of air-cooled magnetron 51 and still leads to waveguide 54, leads to the microwave in concentrated acid-driving case 21. An infrared thermometer is installed in the concentrated acid removing box 21, and an optimal infrared thermometer is installed at a position, close to the water sample disc 23, on one side of the top wall, so that the temperature of a water sample can be better detected. The first microwave heating system 5 realizes microwave heating of the steps of acid concentration and acid removal, and the microwave heating is different from the traditional conduction, convection and radiation, and the transmission of the microwave heating is independent of any medium. The microwave heating is rapid, the long-time oven drying process of the electric furnace is not needed, the thermal inertia is avoided, and the process control is convenient. The temperature can be ensured to rise, the high-temperature heat loss is avoided, and the device is safe and energy-saving.

This embodiment still includes the special collet 6 of COD, makes concentrated acid tank 21 not only can be used for the evaporation water sample, also can make aquatic COD clear up. Need take out water sample dish base 22 and water sample dish 23 this moment, change for special collet 6 of COD can. As shown in FIG. 3, the special COD collet 6 comprises a support 61, test tube mounting holes with different diameters are arranged on the support 61, the test tube mounting holes conform to the outer diameter of a standard test tube, the test tube mounting holes comprise 10mm, 18mm, 20mm and 25mm, and corresponding test tubes 62 can be selected according to experiment needs to be combined for use.

An ashing box 31 is arranged in the ashing working chamber 3, the ashing box 31 is made of a polycrystalline mullite fiber board, a silicon carbide board is placed in the ashing box, and a thermocouple thermometer is arranged below the silicon carbide board to accurately measure temperature. 4-6 crucibles with the capacity of 70ML can be placed above the silicon carbide plate, so that the ashing of the water sample after evaporation and acid removal can be completed at one time. The ashing box 31 is provided therein with a second microwave heating system having the same structure as the first microwave heating system 5 mounted on the side wall thereof.

All be provided with the door body 33 on concentrated acid-dispelling case 21 and the ashing case 31, install the special light 32 of microwave in the case, be provided with the observation window on the door body 33 simultaneously, through light 32 and observation window, the change of the inside water sample of direct observation. The lighting lamp 32 is electrically connected to the controller, and the controller controls the on/off of the lamp. The microwave leakage-preventing device 7 is arranged on the inner wall of the door body 33, the microwave leakage-preventing device 7 comprises a square inner frame 71, a metal outer frame 72 formed by cutting a laser machine at one time is sleeved outside the inner frame 71, a plurality of grooves are arranged on the outer frame 72 to form a rectangular tooth-shaped structure which is sequentially arranged, and a polytetrafluoroethylene anticorrosive coating is also coated on the outer layer of the microwave leakage-preventing device 7. The specially designed microwave leakage prevention device 7 can well prevent microwave leakage and guarantee the safety of users.

The lower part of the box body is arranged above the electric appliance box 4 and is provided with a water receiving disc 8, the water receiving disc 8 can prevent concentrated acid from catching a water sample in the acid box, or other liquid in the box body leaks into the electric appliance box 4 when accidentally spills to damage a circuit and the like.

The bottom surface of the box body is provided with the fortune horse wheel 9, so that the equipment can be moved conveniently to the field operation.

The total alpha total beta radioactivity detection system appearance device in aquatic of this embodiment adopts microwave heating as the heat source, and the heating is rapid, has reduced the preceding processing time of water sample radioactivity greatly. The structure of the device is integrated with a concentrated acid removing working cavity 2 and an ashing working cavity 3, wherein the concentrated acid removing working cavity 2 can realize evaporation, acid removing and drying, one cavity has multiple purposes, the whole device can complete four processes of evaporation, concentration, acid removing and ashing, which are required by the total alpha total beta radioactivity detection concentrated acid removing working cavity 2, the use is convenient, and the sample processing efficiency is high.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in other forms, and any person skilled in the art may use the above-mentioned technical contents to change or modify the equivalent embodiment into equivalent changes and apply to other fields, but any simple modification, equivalent change and modification made to the above embodiments according to the technical matters of the present invention will still fall within the protection scope of the technical solution of the present invention.

Claims

1. The utility model provides an aquatic total alpha total beta radioactivity detection system appearance device, includes the shell, divide into at least one concentration and acid-dispelling working chamber and at least one ashing working chamber through the baffle in the shell, characterized by: a concentrated acid removing box is arranged in the concentrated acid removing working cavity and comprises a water sample tray base, an infrared thermometer and a first microwave heating system, wherein the water sample tray base is arranged in the concentrated acid removing box;

an ashing box is arranged in the ashing working cavity and is made of a polycrystalline mullite fiberboard, and the ashing box comprises a crucible, a thermocouple thermometer and a second microwave heating system, wherein the crucible, the thermocouple thermometer and the second microwave heating system are arranged in the ashing working cavity.

2. The device for detecting and preparing total alpha total beta radioactivity in water according to claim 1, wherein: the concentrated acid-removing box and the ashing box are both provided with a door body, the door body is provided with an observation window, and the concentrated acid-removing box and the ashing box are both provided with special microwave illuminating lamps.

3. The device for detecting total alpha total beta radioactivity in water as claimed in claim 2, wherein: the shell is provided with a touch screen.

4. The device for detecting total alpha total beta radioactivity in water according to claim 3, wherein: the first microwave heating system and the second microwave heating system respectively comprise an air-cooled magnetron, a waveguide, a seven-blade axial flow fan and a wind direction guide pipe.

5. The device for detecting and preparing total alpha total beta radioactivity in water according to claim 1, wherein: and a weighing sensor is arranged on the water sample tray base.

6. The device for detecting and preparing total alpha total beta radioactivity in water according to claim 1, wherein: still include the special collet of COD, the special collet of COD includes the support, is provided with the test tube mounting hole of different diameters on the support.

7. The device for detecting and preparing total alpha total beta radioactivity in water according to claim 1, wherein: the upper part of the concentration acid removing box is provided with an opening, the opening is connected with a ventilation device, and the ventilation device comprises a gas collecting hood, a ventilation pipe and a fan.

8. The device for detecting and preparing total alpha total beta radioactivity in water according to claim 1, wherein: and a water receiving tray is arranged at the lower part in the shell.

9. The device for detecting and preparing total alpha total beta radioactivity in water according to claim 1, wherein: the bottom surface of the shell is provided with a horse wheel.

10. The device for detecting total alpha total beta radioactivity in water as claimed in claim 2, wherein: the microwave leakage-preventing door comprises a door body and is characterized in that an integrally-formed microwave leakage-preventing device is arranged on the inner wall of the door body and comprises four frames, and a plurality of grooves are formed in the frames.