Efficient treatment device for detecting free silicon dioxide in dust

Abstract

The utility model discloses an efficient treatment device for detecting free silicon dioxide in dust, which comprises a sample container, a heating container, a heater, a filter, a filtrate tank, a magnetic stirrer, a temperature sensor and a controller, the heating container comprises a high-temperature heating container and a medium-temperature heating container, the middle lower part of the first sample container is arranged in the high-temperature heating container, the middle lower part of the second sample container is arranged in the medium-temperature heating container, and a heater and a temperature sensor are respectively arranged in the high-temperature heating container and the medium-temperature heating container; a magnetic stirrer is mounted below each sample container; and the temperature sensors, the heaters and the magnetic stirrers are correspondingly connected with a controller respectively. Manual operation and automatic control are combined, compared with traditional manual operation, labor intensity is reduced, compared with traditional automatic operation, equipment cost is reduced, efficiency and detection precision are improved, and popularization is facilitated.

Description

Technical Field

[0001] The utility model relates to equipment for purifying free silicon dioxide in dust, in particular to a high-efficiency processing device for detecting free silicon dioxide in dust. Background Art

[0002] Pneumoconiosis is a general term for a type of occupational lung disease caused by long-term inhalation of industrial mineral dust of varying pathogenicity during occupational activities, with diffuse fibrosis of lung tissue as the main clinical manifestation. It mainly includes 12 types such as silicosis, coal worker's pneumoconiosis, asbestosis, and other pneumoconiosis that can be diagnosed according to the "Diagnostic Criteria for Pneumoconiosis" and "Pathological Diagnostic Criteria for Pneumoconiosis".

[0003] To reduce the incidence of pneumoconiosis, it is crucial to manage the source of the disease and prioritize prevention and monitoring, particularly monitoring and preventing free silica in dust in the workplace. Free silica in dust is a common workplace hazard, both in itself and in combination with other compounds, and poses a serious health risk. Therefore, rapid and accurate measurement of free silica in dust is crucial for dust classification and occupational disease identification. Currently, the pyrophosphate method is the preferred method for detecting free silica in the occupational health standard "GBZ / T192.4-2007". This method first requires the sample (i.e., dust containing a mixture of silicates, metal oxides, and free silica) to be fully dissolved in pyrophosphate at high temperature (245°C to 250°C), then cooled and diluted at medium temperature (around 80°C), and then filtered. Since silicates, metal oxides, etc. must be dissolved in pyrophosphate at 245°C to 250°C, while free silica cannot be dissolved, the purpose of separating the insoluble silica from the filtrate is achieved. Then, the free silica content in the dust can be calculated based on the sample mass and the obtained silica mass to complete the detection.

[0004] In actual operation, there are two ways to separate free silica from dust: manual operation and automatic operation. Traditional manual operation and automatic operation have the following defects:

[0005] Manual operation: Electric furnaces or graphite plates are commonly used to heat samples and pyrophosphoric acid. However, electric heating plates can only heat the bottom side of the sample, resulting in unstable heating and large temperature fluctuations. It is difficult to stably control the temperature at 245°C to 250°C and maintain it for 15 minutes. This can easily cause local overheating and the formation of colloids in the liquid, leading to subsequent experimental failures. At the same time, operators work in high-temperature environments for long periods of time, which puts a heavy physical burden on them. In addition, they often have to process samples in one container at a time, which is time-consuming, labor-intensive, and inefficient.

[0006] Automated operation: Fully automatic detection equipment is used to achieve the silica separation function. On the one hand, this type of equipment is expensive and not suitable for grassroots detection agencies with heavy tasks and tight funds, so it is difficult to promote and popularize. On the other hand, fully automatic detection equipment usually transfers liquids by pumping through a pump tube during the sample liquid transfer step. However, because the detection object is free silica, it is not uniformly present in the diluted pyrophosphate solution, but sinks to the bottom of the container under the action of its own gravity. When transferring liquids by suction, a small amount of free silica at the bottom may not be completely transferred, causing the test results to be lower than the true value, thereby reducing the detection accuracy. Utility Model Content

[0007] The purpose of the present invention is to solve the above problems and provide an efficient processing device for detecting free silica in dust, which is easy to control temperature and simple to operate.

[0008] The utility model achieves the above-mentioned purpose through the following technical solutions:

[0009] A high-efficiency processing device for detecting free silica in dust, comprising a sample container, a heating container, a heater, a filter and a filtrate tank, wherein the filter is installed above the filtrate tank, and the high-efficiency processing device for detecting free silica in dust further comprises a magnetic stirrer, a temperature sensor and a controller, wherein the sample container comprises a first sample container and a second sample container, wherein the volume of the first sample container is smaller than that of the second sample container, and the heating container comprises a high-temperature heating container and a medium-temperature heating container, wherein the middle and lower part of the first sample container is placed in the high-temperature heating container, and the high-temperature heating container contains a liquid having a boiling point higher than The liquid at 250°C is placed in the middle and lower part of the second sample container. The medium-temperature heating container is filled with a liquid with a boiling point higher than 70°C. The high-temperature heating container and the medium-temperature heating container are respectively equipped with the heater and the temperature sensor. The magnetic stirrer is respectively installed below each of the first sample containers and below each of the second sample containers. A stirring bar matching each of the magnetic stirrers is respectively installed in each of the first sample containers and each of the second sample containers. The temperature sensor, the heater and the magnetic stirrer are respectively connected to the controller.

[0010] Preferably, in order to improve the integration of the entire device to reduce the occupied space and facilitate operation, the medium-temperature heating container filled with water or oil and in a ring shape surrounds the periphery of the high-temperature heating container filled with oil, and a base is provided in the filtrate tank. The high-temperature heating container and the medium-temperature heating container are both placed above the base. The base is provided with an inner cavity and the magnetic stirrer is installed in the inner cavity. The middle and lower parts of multiple first sample containers pass through the corresponding through holes on the top of the high-temperature heating container from top to bottom and are placed in the high-temperature heating container. The middle and lower parts of multiple second sample containers pass through the corresponding through holes on the top of the medium-temperature heating container from top to bottom and are placed in the medium-temperature heating container.

[0011] Preferably, in order to facilitate filtrate operation, multiple filters with open upper ends are installed on the outer wall of the medium-temperature heating container and are evenly distributed in the circumferential direction, and the liquid outlets at the lower ends of multiple filters are located in the filtrate tank.

[0012] Preferably, in order to cool and drip oil from the first sample container after sufficient dissolution (i.e., let the oil on the outer wall drip down for later operation), the top of the high-temperature heating container is also provided with a vertical oil filter through hole and an oil filter mesh cylinder with an upper end opening is installed in each of the oil filter through holes.

[0013] Preferably, in order to achieve a reliable supporting function, a plurality of support columns for supporting the high-temperature heating container and the medium-temperature heating container are installed in the inner cavity of the base.

[0014] Preferably, in order to facilitate processing and application, the filtrate tank, the high-temperature heating container and the base are all circular, and the medium-temperature heating container is annular.

[0015] Preferably, in order to facilitate the realization of more electrical control functions, a control panel is installed on the outer wall of the filtrate tank, and the controller is arranged in the control panel. The control panel is provided with two temperature display screens, two temperature adjustment buttons and two magnetic stirring adjustment knobs. The signal output ends of the multiple temperature sensors, the signal output ends of the two temperature adjustment buttons and the signal output ends of the two magnetic stirring adjustment knobs are respectively connected to the input ends of the controller, and the control input ends of the multiple heaters, the control input ends of the multiple magnetic stirrers and the signal input ends of the two temperature display screens are respectively connected to the output ends of the controller.

[0016] Preferably, for ease of application, the heater is an electric heating tube, the filter is a funnel provided with filter paper, the first sample container is a high temperature resistant test tube, and the second sample container is a beaker.

[0017] The beneficial effects of the present invention are:

[0018] The utility model integrates a first sample container, a second sample container, a high-temperature heating container, a medium-temperature heating container, a heater, a filter and a filtrate tank to form a set of high-efficiency processing devices with temperature detection and control, high-temperature dissolution, medium-temperature dilution, electrically controlled stirring, and filtration separation functions. The utility model can achieve accurate heating temperature control, high temperature stability, and sufficient dissolution. In combination with manual operation and automatic control, the labor intensity is reduced compared with traditional manual operation, the efficiency and detection accuracy are improved, and the equipment cost is reduced compared with traditional automatic operation, which is conducive to the popularization of grassroots detection institutions. In addition, the liquid transfer during filtration is more thorough, and the detection accuracy is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional diagram of the efficient processing device for detecting free silicon dioxide in dust according to the utility model;

[0020] Figure 2 This is a partial cutaway perspective view of the efficient processing device for detecting free silica in dust described in the utility model. Figure 1 The perspective is the same, but some parts are reduced in the picture;

[0021] Figure 3 This is a front view of the efficient processing device for detecting free silica in dust according to the utility model;

[0022] Figure 4 It is a top view of the efficient processing device for detecting free silicon dioxide in dust described in the utility model. DETAILED DESCRIPTION

[0023] The present invention will be further described below with reference to the accompanying drawings:

[0024] like Figures 1-4As shown, the efficient processing device for detecting free silica in dust of the utility model includes a sample container, a heating container, a heater 13, a filter 1, a filtrate tank 2, a magnetic stirrer 16, a temperature sensor 14 and a controller (not shown in the figure), the filter 1 is installed above the filtrate tank 2, the sample container includes a first sample container 9 and a second sample container 3, the volume of the first sample container 9 is smaller than the volume of the second sample container 3, the heating container includes a high-temperature heating container 10 and a medium-temperature heating container 11, the middle and lower part of the first sample container 9 is placed in the high-temperature heating container 10, and the high-temperature heating container 10 is filled with a liquid with a boiling point higher than 250°C (not shown in the figure), the middle and lower part of the second sample container 3 is placed in the medium-temperature heating container 11, and the medium-temperature heating container 11 is filled with a liquid with a boiling point higher than 70°C (not shown in the figure), and the high-temperature heating container 10 and the medium-temperature heating container 11 are respectively equipped with a heater 13 and a temperature sensor 14. A magnetic stirrer 16 is installed below each first sample container 9 and below each second sample container 3, and a stirrer 15 matching each magnetic stirrer 16 is installed in each first sample container 9 and each second sample container 3. The temperature sensor 14, the heater 13 and the magnetic stirrer 16 are respectively connected to the controller.

[0025] like Figures 1-4 As shown, the present invention also discloses the following multiple more optimized specific structures:

[0026] In order to improve the integration of the entire device to reduce the occupied space and facilitate operation, a medium-temperature heating container 11 in an annular shape filled with water or oil surrounds the periphery of the high-temperature heating container 10 filled with oil. A base 12 is provided in the filtrate tank 2. The high-temperature heating container 10 and the medium-temperature heating container 11 are both placed above the base 12. The base 12 is provided with an inner cavity and a magnetic stirrer 16 is installed in the inner cavity. The middle and lower parts of multiple first sample containers 9 pass through the corresponding through holes on the top of the high-temperature heating container 10 from top to bottom and are placed in the high-temperature heating container 10. The middle and lower parts of multiple second sample containers 3 pass through the corresponding through holes on the top of the medium-temperature heating container 11 from top to bottom and are placed in the medium-temperature heating container 11.

[0027] In order to facilitate the filtrate operation, multiple filters 1 with open upper ends are installed on the outer wall of the medium-temperature heating container 11 and are evenly distributed in the peripheral direction. The liquid outlets at the lower ends of the multiple filters 1 are located in the filtrate tank 2.

[0028] In order to cool and drip oil from the first sample container 9 after sufficient dissolution (i.e., to allow the oil on the outer wall to drip down for later operation), vertical oil filter holes are further provided on the top of the high-temperature heating container 10, and an oil filter mesh cylinder 5 with an upper end opening is installed in each of the oil filter holes.

[0029] In order to achieve a reliable supporting function, a plurality of support columns 17 for supporting the high-temperature heating container 10 and the medium-temperature heating container 11 are installed in the inner cavity of the base 12.

[0030] In order to facilitate processing and application, the filtrate tank 2, the high-temperature heating container 10 and the base 12 are all circular, and the medium-temperature heating container 11 is annular.

[0031] In order to facilitate the realization of more electrical control functions, a control panel 8 is installed on the outer wall of the filtrate tank 2, and the controller is arranged in the control panel 8. The control panel 8 is provided with two temperature display screens 4 (corresponding to the temperature sensors 14 placed in the high-temperature heating container 10 and the medium-temperature heating container 11 respectively), two temperature adjustment buttons 6 (corresponding to the heaters 13 placed in the high-temperature heating container 10 and the medium-temperature heating container 11 respectively) and two magnetic stirring adjustment knobs 7 (corresponding to the magnetic stirrers 16 placed in the high-temperature heating container 10 and the medium-temperature heating container 11 respectively). The signal output ends of the multiple temperature sensors 14, the signal output ends of the two temperature adjustment buttons 6 and the signal output ends of the two magnetic stirring adjustment knobs 7 are respectively connected to the input ends of the controller, and the control input ends of the multiple heaters 13, the control input ends of the multiple magnetic stirrers 16 and the signal input ends of the two temperature display screens 4 are respectively connected to the output ends of the controller.

[0032] For ease of application, the heater 13 is an electric heating tube, the filter 1 is a funnel with filter paper, the first sample container 9 is a high-temperature resistant test tube with a liquid guide tube at its upper end for conducting liquid, and the second sample container 3 is a beaker with a liquid guide tube at its upper end for conducting liquid.

[0033] In addition, the figure also shows but not marked the drain pipe provided at the lower part of the side wall of the filtrate tank 2. The bottom surface of the filtrate tank 2 has a certain slope and the position close to the drain pipe is the lowest.

[0034] like Figures 1-4As shown, when in use, first place multiple samples (i.e., dust including silicate, metal oxide, and free silicon dioxide) in an oven for drying, then weigh a certain mass of samples and place them in multiple first sample containers 9, add a certain mass of pyrophosphoric acid, place multiple first sample containers 9 on a high-temperature heating container 10, control the temperature of the liquid in the high-temperature heating container 10 to reach a set temperature (e.g., 260°C), and after heat transfer, the temperature in the first sample container 9 is between 245-250°C, start the corresponding magnetic stirrer 16, and make the liquid in the multiple first sample containers 9 The stirring bar rotates and is maintained for 15-25 minutes until all substances in the sample except silicon dioxide are fully dissolved in the pyrophosphoric acid. Then, multiple first sample containers 9 are taken out and placed in multiple oil filter cylinders 5 respectively. They are left to stand for a period of time to cool to 80°C or below and to complete the oil dripping. Then, the solutions in the multiple first sample containers 9 are slowly poured into the multiple second sample containers 3 respectively. The first sample containers 9 are washed several times with pure water at about 80°C to ensure that all the samples to be tested are transferred to the second sample containers 3. The medium temperature heating container 1 is controlled. 1 reaches the set temperature (for example, 85°C), and the temperature in the second sample container 3 is about 80°C after heat transfer. The corresponding magnetic stirrer 16 is started to rotate the stirrers in the multiple second sample containers 3 to fully dilute the liquid in the second sample container 3; then it is allowed to stand until the suspension is slightly settled. The second sample container 3 is taken out while hot and filtered through the outer filter 1. The second sample container 3 is washed several times with 0.1mol / L hydrochloric acid to transfer all of it into the filter 1. The residue in the filter 1 is then rinsed 3 to 5 times, and then washed with pure water. The filter paper of filter 1 is filtered until the pH value of the filtrate is neutral. Finally, the filter paper with sediment (i.e., silica) is taken out (from then on the silica separation function is completed) and folded several times, placed in a porcelain crucible with constant weight, carbonized on an electric furnace, and placed in a muffle furnace for ashing at 800℃~900℃ for 30min; taken out, slightly cooled to room temperature, placed in a desiccator for equilibrium for 1h, weighed and recorded to constant weight, and the mass of silica is obtained. According to the mass of silica and the total mass of the corresponding sample, the content of free silica in the dust corresponding to the sample can be calculated to complete the detection.

[0035] In addition, in practical applications, the high-temperature heating container 10 and the medium-temperature heating container 11 can also be replaced by other heating components, such as direct heating with metal heating plates.

[0036] The above embodiments are only preferred embodiments of the present invention and are not limitations on the technical solutions of the present invention. Any technical solution that can be implemented on the basis of the above embodiments without creative work should be deemed to fall within the scope of protection of the patent of the present invention.

Claims

1. An efficient processing device for detecting free silica in dust, comprising a sample container, a heating container, a heater, a filter, and a filtrate tank, wherein the filter is installed above the filtrate tank, and is characterized in that: The efficient processing device for detecting free silica in dust also includes a magnetic stirrer, a temperature sensor and a controller. The sample container includes a first sample container and a second sample container, the volume of the first sample container is smaller than the volume of the second sample container, the heating container includes a high-temperature heating container and a medium-temperature heating container, the middle and lower part of the first sample container is placed in the high-temperature heating container, the high-temperature heating container is filled with a liquid with a boiling point higher than 250°C, the middle and lower part of the second sample container is placed in the medium-temperature heating container, the medium-temperature heating container is filled with a liquid with a boiling point higher than 70°C, the high-temperature heating container and the medium-temperature heating container are respectively equipped with the heater and the temperature sensor, the magnetic stirrer is respectively installed below each of the first sample containers and below each of the second sample containers, and a stirrer matching each of the magnetic stirrers is respectively installed in each of the first sample containers and each of the second sample containers, and the temperature sensor, the heater and the magnetic stirrer are respectively connected to the controller.

2. The efficient processing device for detecting free silica in dust according to claim 1, characterized in that: The medium-temperature heating container, which is annular and filled with water or oil, surrounds the periphery of the high-temperature heating container filled with oil. A base is provided in the filtrate tank. The high-temperature heating container and the medium-temperature heating container are both placed above the base. The base is provided with an inner cavity and the magnetic stirrer is installed in the inner cavity. The middle and lower parts of multiple first sample containers pass through the corresponding through holes on the top of the high-temperature heating container from top to bottom and are placed in the high-temperature heating container. The middle and lower parts of multiple second sample containers pass through the corresponding through holes on the top of the medium-temperature heating container from top to bottom and are placed in the medium-temperature heating container.

3. The efficient processing device for detecting free silica in dust according to claim 2, characterized in that: The multiple filters with upper openings are installed on the outer wall of the medium-temperature heating container and are evenly distributed in the peripheral direction. The liquid outlets at the lower ends of the multiple filters are located in the filtrate tank.

4. The efficient processing device for detecting free silica in dust according to claim 2, characterized in that: The top of the high-temperature heating container is also provided with vertical oil filtering through holes, and an oil filtering mesh cylinder with an upper end opening is installed in each of the oil filtering through holes.

5. The efficient processing device for detecting free silica in dust according to claim 2, characterized in that: A plurality of support columns for supporting the high-temperature heating container and the medium-temperature heating container are installed in the inner cavity of the base.

6. The efficient processing device for detecting free silicon dioxide in dust according to claim 2, characterized in that: The filtrate tank, the high-temperature heating container and the base are all circular, and the medium-temperature heating container is annular.

7. The efficient processing device for detecting free silica in dust according to any one of claims 2 to 6, characterized in that: A control panel is installed on the outer wall of the filtrate tank, and the controller is arranged in the control panel. The control panel is provided with two temperature display screens, two temperature adjustment buttons and two magnetic stirring adjustment knobs. The signal output ends of the multiple temperature sensors, the signal output ends of the two temperature adjustment buttons and the signal output ends of the two magnetic stirring adjustment knobs are respectively connected to the input ends of the controller, and the control input ends of the multiple heaters, the control input ends of the multiple magnetic stirrers and the signal input ends of the two temperature display screens are respectively connected to the output ends of the controller.

8. The efficient processing device for detecting free silica in dust according to any one of claims 1 to 6, characterized in that: The heater is an electric heating tube, the filter is a funnel provided with filter paper, the first sample container is a high temperature resistant test tube, and the second sample container is a beaker.

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