CN215218028U - Iodine adsorber sampling representativeness verifying device - Google Patents
Iodine adsorber sampling representativeness verifying device Download PDFInfo
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- CN215218028U CN215218028U CN202121198772.2U CN202121198772U CN215218028U CN 215218028 U CN215218028 U CN 215218028U CN 202121198772 U CN202121198772 U CN 202121198772U CN 215218028 U CN215218028 U CN 215218028U
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Abstract
The utility model relates to a sampling representativeness verification device of an iodine adsorber, which belongs to the technical field of nuclear purification, and comprises a compressed air quick connector, a pressure reducing valve, a laminar flow element and a sample cup measuring cavity which are sequentially communicated along a gas path, wherein a sampling sample cup is arranged in the sample cup measuring cavity; the laminar flow element is provided with a laminar flow element flow sensor and a pressure sensor, and the flow rate and the corresponding differential pressure of the sampling cup are respectively measured by the laminar flow element flow sensor and the pressure sensor. The utility model can accurately measure the flow speed and the pressure difference of the sampling sample cup, and further study the flow and the pressure difference characteristics of the sampling sample cup, thereby realizing the sampling representative verification of different types of sample cups; the device simple operation, the repeatability is good.
Description
Technical Field
The utility model belongs to the technical field of nuclear purification, specifically be a device is verified to iodine adsorber sample representativeness.
Background
The exhaust system is arranged in a nuclear power station, a spent fuel post-processing plant, an isotope production unit and a nuclear research unit, and the exhaust purification system of the nuclear facility is provided with an iodine adsorber, so that the emission of radioactive iodine is reduced through adsorption decay, and the safety of workers, the public and the environment is protected.
In order to ensure the safe and reliable operation of the exhaust purification systems, the iodine adsorbers need to be subjected to a first acceptance test and a regular supervision test in the debugging and operation processes so as to ensure the functional integrity of the iodine adsorbers. When the performance of the adsorption medium of the iodine adsorber is periodically checked, the adsorption performance of the iodine adsorber needs to be sampled and detected without destroying the iodine adsorber, so that a sampling device with a plurality of sampling sample cups needs to be arranged, representative activated carbon samples are provided, and the laboratory performance detection is periodically performed. Whether the activated carbon provided by the sampling cup is representative or not depends on factory theoretical calculation or experience in most cases at present, and the activated carbon cannot be verified again after a period.
Disclosure of Invention
For solving the defect that prior art exists, the utility model aims to provide a representative verifying attachment of iodine adsorber sample, the device can carry out the proof test to the sample representativeness of different grade type sample cup, the simple operation, good reproducibility.
In order to achieve the above purpose, the utility model adopts a technical scheme that:
a sampling representativeness verification device of an iodine adsorber comprises a compressed air quick connector, a pressure reducing valve, a laminar flow element and a sample cup measuring cavity which are sequentially communicated along a gas path, wherein a sampling sample cup is arranged in the sample cup measuring cavity; the laminar flow element is provided with a laminar flow element flow sensor and a pressure sensor, and the flow rate and the corresponding differential pressure of the sampling cup are respectively measured by the laminar flow element flow sensor and the pressure sensor.
Further, the iodine adsorber as described above samples the representative verification device, and is connected to the external compressed air through the compressed air quick connector.
Further, the iodine adsorber sampling representative validation apparatus described above, regulates the gas flow rate through the pressure relief valve.
Further, the iodine adsorber sampling representative verification device as described above is further provided with a temperature sensor on the laminar flow element, and the temperature of the gas flow is measured by the temperature sensor.
Further, according to the iodine adsorber sampling representative verification device, the airflow is pretreated through the laminar flow element, so that the airflow is ensured to uniformly flow into the sampling cup.
Further, according to the iodine adsorber sampling representative verification device, the sampling sample cup is connected to the sample cup measurement cavity in a vertical or horizontal mode.
Further, according to the iodine adsorber sampling representative verification device, the shape of the sampling cup comprises a T shape or an I shape.
The utility model has the advantages as follows:
the sampling representativeness verifying device of the iodine adsorber provided by the utility model can be used for researching the flow and pressure difference characteristics of the sampling sample cup by accurately measuring the flow speed and the pressure difference of the sampling sample cup, thereby realizing the sampling representativeness verification of different types of sample cups; the device simple operation, the repeatability is good.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of a representative sampling verification device for an iodine adsorber according to the present invention;
FIG. 2 is a schematic view of an A-type sampling cup;
FIG. 3 is a graph showing the variation of the flow rate of the A-type sampling cup with the pressure difference;
FIG. 4 is a schematic view of a B-type sampling cup;
FIG. 5 is a graph showing the flow rate of the B-type sampling cup varying with the pressure difference.
The device comprises a 1-compressed air quick connector, a 2-pressure reducing valve, a 3-temperature sensor, a 4-laminar flow element flow sensor, a 5-laminar flow element, a 6-pressure sensor and a 7-sample cup measuring cavity.
Detailed Description
The invention is further described with reference to specific embodiments and drawings attached to the description.
The utility model discloses a core design thought is through the flow of research sample cup and the characteristic of pressure differential, when verifying sample cup pressure differential and iodine adsorber unanimity, whether the velocity of flow of sample cup is within 10% of iodine adsorber, and then confirms whether the active carbon sample that the sample cup was taken out is representative.
Fig. 1 shows a schematic structural diagram of an embodiment of a sampling representative verification device for an iodine adsorber according to the present invention, and it can be seen from the diagram that the device includes a compressed air quick connector 1, a pressure reducing valve 2, a laminar flow element 5 and a sample cup measuring cavity 7 which are sequentially communicated along a gas path, wherein the compressed air quick connector 1 is used for connecting external compressed air; the flow rate of the gas flow is adjusted to the flow rate required by the test through a pressure reducing valve 2; a sampling cup is arranged in the sample cup measuring cavity 7, and the laminar flow element 5 pretreats the airflow to ensure that the airflow can uniformly flow into the sampling cup; the laminar flow element 5 is also provided with a temperature sensor 3, a laminar flow element flow sensor 4 and a pressure sensor 6 which are respectively used for measuring the temperature of the airflow, the flow velocity of the sampling cup and the corresponding pressure difference.
The flow rate-pressure difference of the sampling cup is in a linear relation, and the sampling representativeness of the sampling cup can be evaluated.
The use method of the iodine adsorber sampling representativeness verifying device is as follows:
firstly, a sampling sample cup is connected into a sample cup measuring cavity 7 in a horizontal or vertical mode, then a compressed air quick connector 1 is communicated with compressed air, a pressure reducing valve 2 is slowly rotated, and the flow rate of air flow is adjusted to the flow rate required by a test. After the gas flow has passed the laminar flow member 5, it is ensured that the gas flow passes the sampling cup uniformly. At a certain flow rate, the temperature of the airflow is measured by the temperature sensor 3, and the flow and the pressure difference of the sampling cup are respectively given by the flow sensor 4 and the pressure sensor 6 of the laminar flow element. And rotating the pressure reducing valve again, and regulating the air flow to another flow rate to measure the flow of the sampling sample cup and the corresponding pressure difference. A flow-pressure difference relation graph of the sampling cup is prepared, and a sampling representative study is carried out.
Example 1
The A-type sampling sample cup shown in FIG. 2 is connected into the sample cup measuring cavity in a vertical mode and a horizontal mode, the flow and the corresponding pressure difference are respectively measured, and a trend graph of the flow velocity of the A-type sampling sample cup along with the pressure difference is obtained, and the graph is shown in FIG. 3.
Example 2
The B-type sampling sample cup shown in FIG. 4 is connected into the sample cup measuring cavity in a vertical mode and a horizontal mode, the flow and the corresponding pressure difference are respectively measured, and a trend graph of the flow velocity of the B-type sampling sample cup along with the pressure difference is obtained, and the graph is shown in FIG. 5.
As can be seen from fig. 3 and 5:
1. only when the A-type sample cup is horizontally accessed, the flow rate and the pressure difference meet the AG-1 relevant standards.
2. When the type A sample cup and the type B sample cup are directly hung, the flow rate and the pressure difference meet the requirements of related standards of N509-1989.
3. Compared with a sample cup parallel access mode, the sample cup is vertically accessed to increase resistance so as to reduce flow speed.
4. In order to ensure representative sampling, the A-type sample cup is horizontally connected to the iodine adsorber bent frame, so that the pressure drop generated by a connecting pipeline between the sample cup and the bent frame is ensured to be small; the B-type sample cup is vertically connected to the iodine adsorber bent frame, and corresponding resistance is added between the sample cup and the bent frame to ensure that the flow rate of the sample cup meets the AG-1 relevant standard.
5. A linear regression equation can be carried out by utilizing the relation between the flow and the pressure difference, and the sampling representativeness of the sample cup is evaluated by the linear regression equation.
The sampling representativeness verification device of the iodine adsorber provided by the utility model can be used for researching the flow and pressure difference characteristics of the sampling sample cup through the accurate measurement of the flow and the pressure difference of the sampling sample cup, thereby realizing the sampling representativeness verification of different types of sample cups; the device simple operation, the repeatability is good.
The above-described embodiments are merely illustrative of the present invention, which may be embodied in other specific forms or in other specific forms without departing from the spirit or essential characteristics thereof. The described embodiments are, therefore, to be considered in all respects as illustrative and not restrictive. The scope of the invention should be determined by the appended claims, and any changes that are equivalent to the intent and scope of the claims are intended to be embraced therein.
Claims (7)
1. A sampling representativeness verification device of an iodine adsorber is characterized by comprising a compressed air quick connector (1), a pressure reducing valve (2), a laminar flow element (5) and a sample cup measuring cavity (7) which are sequentially communicated along a gas path, wherein a sampling sample cup is arranged in the sample cup measuring cavity (7); the laminar flow element (5) is provided with a laminar flow element flow sensor (4) and a pressure sensor (6), and the flow rate and the corresponding differential pressure of the sampling sample cup are respectively measured by the laminar flow element flow sensor (4) and the pressure sensor (6).
2. The iodine adsorber sampling representative verification device according to claim 1, wherein external compressed air is connected through the compressed air quick connector (1).
3. The iodine adsorber sampling representativeness verification device according to claim 2, wherein the gas flow rate is regulated by the pressure reducing valve (2).
4. A device for iodine adsorber sampling representativeness verification according to one of claims 1 to 3, characterized by a temperature sensor (3) being further provided on the laminar flow element (5), the temperature of the gas flow being measured by means of the temperature sensor (3).
5. The iodine adsorber sampling representative validation device of claim 1, wherein the gas stream is pre-treated by the laminar flow element (5) to ensure uniform flow of gas into the sampling cup.
6. The iodine adsorber sampling representative verification device according to claim 5, wherein the sampling cup is connected to the sample cup measurement cavity (7) in a vertical or horizontal manner.
7. The iodine adsorber sampling representative verification device of claim 5 or 6 wherein the external shape of the sampling cup comprises a "T" shape or an "i" shape.
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| CN202121198772.2U CN215218028U (en) | 2021-05-31 | 2021-05-31 | Iodine adsorber sampling representativeness verifying device |
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| CN202121198772.2U CN215218028U (en) | 2021-05-31 | 2021-05-31 | Iodine adsorber sampling representativeness verifying device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114659206A (en) * | 2022-02-22 | 2022-06-24 | 中国核电工程有限公司 | Balance system capable of regulating and controlling resistance of iodine filter pipeline fan in real time |
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2021
- 2021-05-31 CN CN202121198772.2U patent/CN215218028U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114659206A (en) * | 2022-02-22 | 2022-06-24 | 中国核电工程有限公司 | Balance system capable of regulating and controlling resistance of iodine filter pipeline fan in real time |
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