Adsorption system for radioactive aerosol

Abstract

The utility model discloses a radioactive aerosol adsorption system which comprises a shielding layer and a sealed space defined by the shielding layer, a gas buffer container used for collecting radioactive aerosol and an adsorption system used for absorbing the radioactive aerosol are arranged in the sealed space, and a gas inlet pipe and a gas outlet pipe are arranged on the gas buffer container. The gas outlet pipe is connected with the adsorption device, the adsorption device is connected with a gas storage bottle through a pipeline, and a dryer is arranged between the adsorption device and the gas storage bottle. The radioactive aerosol adsorption system is compact in structure and small in occupied space, radioactive gas is not prone to leakage, the radioactive gas adsorption effect is good, the adsorption efficiency is high, and environmental pollution can be reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of radioactive medicines, and in particular relates to a radioactive aerosol adsorption system. Background Art

[0002] Chemical synthesis reactions occur during the production of radioactive drugs, and this reaction process inevitably produces radioactive gases. These radioactive gases pollute the environment and cause irreversible damage to the human body, so it is best to purify them before discharging them into the atmosphere. However, the current treatment methods for radioactive gases generated by the reaction are mainly as follows:

[0003] Method 1: Radioactive gases are not collected but directly drawn to the roof through exhaust air and then discharged into the atmosphere after being adsorbed by activated carbon;

[0004] Method 2: Collect radioactive gases in waste bags and release them after they decay.

[0005] In the above method 1, only activated carbon is used to adsorb radioactive gases, and its adsorption effect and efficiency are poor, which will cause more radioactive gases to enter the environment without being adsorbed; while method 2 has the disadvantages of occupying a large space, easy leakage, inconvenience when emptying the waste gas bag, and a relatively passive working state; and the waste gas bag is still discharged to the operation area, which has certain safety hazards and is not suitable for continuous production. Therefore, it is particularly important to invent a radioactive aerosol adsorption system with a compact structure, small space occupation, good adsorption effect and high adsorption efficiency.

[0006] The utility model is made based on this situation. Utility Model Content

[0007] The utility model aims to provide a radioactive aerosol adsorption system in view of the problems in the prior art such as poor radioactive gas adsorption effect and efficiency, large space occupation, easy leakage, inconvenience in emptying waste gas bags, etc. The system has a compact structure, small space occupation, and radioactive gas is not easy to leak. It also has good radioactive gas adsorption effect and high adsorption efficiency, and can reduce environmental pollution.

[0008] The utility model is realized through the following technical solutions:

[0009] A radioactive aerosol adsorption system comprises: a shielding layer and a sealed space surrounded by the shielding layer, wherein a gas buffer container for collecting radioactive aerosols and an adsorption system for absorbing radioactive aerosols are arranged in the sealed space, an air inlet pipe and an air outlet pipe are respectively arranged on the gas buffer container, the air outlet pipe is connected to the adsorption device, a pipeline of the adsorption device is connected to a gas storage cylinder, and a dryer is arranged between the adsorption device and the gas storage cylinder.

[0010] In the radioactive aerosol adsorption system as described above, the air inlet end of the air inlet pipe extends out from the sealed space, and the air inlet pipe is provided with an electric air pump and a stop valve.

[0011] In the radioactive aerosol adsorption system as described above, the stop valve is arranged outside the sealed space.

[0012] In the radioactive aerosol adsorption system as described above, a detector for detecting the radioactive gas content is provided on the shielding layer, and the probe of the detector extends into the sealed space.

[0013] In the radioactive aerosol adsorption system as described above, the shielding layer is a lead shielding layer.

[0014] In the radioactive aerosol adsorption system as described above, the adsorption device is a sealed container filled with a weak alkaline solution, and the outlet end of the outlet pipe extends into the weak alkaline solution.

[0015] In the radioactive aerosol adsorption system as described above, the adsorption device is a cold trap.

[0016] In the radioactive aerosol adsorption system as described above, the gas outlet pipe is provided with a one-way valve that only allows gas and liquid to flow from the gas buffer container through the adsorption device.

[0017] In the radioactive aerosol adsorption system as described above, the gas storage cylinder is a high-pressure storage tank made of metal.

[0018] In the radioactive aerosol adsorption system as described above, the desiccant in the dryer is activated carbon.

[0019] Compared with the prior art, the utility model has the following advantages:

[0020] 1. The adsorption system of the utility model has a compact structure and occupies little space, which can save production space and reduce production cost investment;

[0021] 2. The shielding layer creates a sealed space, which can reduce the radiation of radioactive gases to operators;

[0022] 3. The adsorption system of the utility model makes it difficult for radioactive gas to leak, thus reducing the risk to personnel after leakage;

[0023] 4. Absorb the nuclides in the radioactive aerosol into a weak alkaline solution, do not release them into the atmosphere, and reduce environmental pollution;

[0024] 5. The adsorption system of the utility model can quantitatively analyze the loss of radionuclides according to the content of radionuclides in the adsorption device and the gas storage cylinder. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the radioactive aerosol adsorption system of the utility model. DETAILED DESCRIPTION

[0026] In order to enable those skilled in the art to better understand the technical solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0027] like Figure 1 As shown, a radioactive aerosol adsorption system in an embodiment of the utility model comprises: a shielding layer 1 and a sealed space 11 surrounded by the shielding layer 1, a gas buffer container 2 for collecting radioactive aerosols and an adsorption system 3 for absorbing radioactive aerosols are arranged in the sealed space 11, an air inlet pipe 21 and an air outlet pipe 22 are respectively arranged on the gas buffer container 2, the air outlet pipe 22 is connected to the adsorption device 3, a pipeline on the adsorption device 3 is connected to a gas storage bottle 4, and a dryer 5 is arranged between the adsorption device 3 and the gas storage bottle 4.

[0028] The utility model greatly reduces the radiation of operators by providing a shielding layer 1 in the system, thereby improving the work efficiency of operators. The radioactive aerosol adsorption system collects the aerosol discharged in the experiment into the gas storage bottle 4 after buffering, absorbing and drying. The whole system has a compact structure and occupies a small space. The radioactive gas is not easy to leak and reflux. Moreover, the loss of radioactive nuclides in the experiment can be quantitatively analyzed according to the nuclide content in the gas storage bottle 4 and the adsorption device 3, so as to improve the nuclear medicine production process and increase the nuclear medicine production yield.

[0029] Specifically, Figure 1 As shown, in this embodiment, the air inlet port 211 of the air inlet pipe 21 extends from the sealed space 11, and the air inlet pipe 21 is provided with an electric air pump 6 and a stop valve 7. The electric air pump 6 can compress the aerosol and then deliver it to the adsorption system, thereby improving the working efficiency of the entire adsorption system; more specifically, the stop valve 7 of this embodiment is arranged outside the sealed space 11, which is more convenient for operators to operate.

[0030] In this embodiment, a detector 8 for detecting the content of radioactive gas is provided on the shielding layer 1, and a probe 81 of the detector 8 extends into the sealed space 11. The detector 8 detects whether there is radioactive gas leakage in the sealed space 11, ensures the sealing of each device and pipeline connection, and reduces the risk to personnel after the leakage of nuclides.

[0031] The shielding layer 1 used in this embodiment is a lead shielding layer, which can better reduce the radiation of nuclides to the human body.

[0032] In this embodiment, the adsorption device 3 is a sealed container with a weak alkaline solution inside, and the outlet end 221 of the outlet pipe 22 extends into the weak alkaline solution to ensure that the radioactive aerosol is absorbed and compressed, and turned into liquid, which is easy to control and reduce the harm to personnel and the environment; of course, the adsorption device 3 can also be a cold trap. Furthermore, a one-way valve 9 is provided on the outlet pipe 22, which only allows gas and liquid to flow from the gas buffer container 2 through the adsorption device 3, so as to prevent the backflow of gas or liquid.

[0033] The gas cylinder 4 is a high-pressure storage tank made of metal. In actual operation, a stainless steel gas cylinder is usually selected; the desiccant in the dryer is generally activated carbon.

[0034] The working principle of the utility model adsorption system is as follows:

[0035] The radioactive aerosol discharged from the experiment is compressed by an electric air pump 6 and then sent to a gas buffer container 2 stored in a sealed space 11 surrounded by a shielding layer 1 through an air inlet pipe 21. After being buffered by the gas buffer container 2, it is discharged from an air outlet pipe 22 to an adsorption device 3. After being adsorbed by the adsorption device, it enters a dryer 5 for drying. The dried gas enters a gas storage bottle 4 for compression and storage for subsequent analysis or processing.

Claims

1. A radioactive aerosol adsorption system, characterized in that include: A shielding layer (1) and a sealed space (11) surrounded by the shielding layer (1); a gas buffer container (2) for collecting radioactive aerosols and an adsorption device (3) for absorbing radioactive aerosols are provided in the sealed space (11); an air inlet pipe (21) and an air outlet pipe (22) are respectively provided on the gas buffer container (2); the air outlet pipe (22) is connected to the adsorption device (3); a pipeline of the adsorption device (3) is connected to a gas storage bottle (4); a dryer (5) is provided between the adsorption device (3) and the gas storage bottle (4).

2. The radioactive aerosol adsorption system according to claim 1, characterized in that An air intake end (211) on the air intake pipe (21) extends out from the sealed space (11), and an electric air pump (6) and a stop valve (7) are provided on the air intake pipe (21).

3. The radioactive aerosol adsorption system according to claim 2, characterized in that The stop valve (7) is arranged outside the sealed space (11).

4. The radioactive aerosol adsorption system according to claim 1, characterized in that A detector (8) for detecting the content of radioactive gas is provided on the shielding layer (1), and a probe (81) of the detector (8) extends into the sealed space (11).

5. The radioactive aerosol adsorption system according to claim 1 or 4, characterized in that The shielding layer (1) is a lead shielding layer.

6. The radioactive aerosol adsorption system according to claim 1, characterized in that The adsorption device (3) is a sealed container filled with a weak alkaline solution, and the outlet end (221) of the outlet pipe (22) extends into the weak alkaline solution.

7. The radioactive aerosol adsorption system according to claim 1, characterized in that The adsorption device (3) is a cold trap.

8. The radioactive aerosol adsorption system according to claim 1, characterized in that The gas outlet pipe (22) is provided with a one-way valve (9) that only allows gas and liquid to flow from the gas buffer container (2) through the adsorption device (3).

9. The radioactive aerosol adsorption system according to claim 1, characterized in that The gas storage bottle (4) is a high-pressure storage tank made of metal.

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