A system for rapidly measuring the desorption capacity of low-temperature adsorbents under vacuum

Abstract

The utility model discloses a system for rapidly measuring the desorption capacity of a low-temperature adsorbent under a vacuum environment, relates to the technical field of low-temperature adsorbent testing, comprises a weighing and measuring component, a heat-insulating component and a filling container, wherein the weighing and measuring component is provided with a heat-insulating component, the filling container is arranged on the heat-insulating component, the heat-insulating component is used to isolate the heat between the filling container and the weighing and measuring component, a heating component is installed on the outer wall of the filling container, a vacuum measuring component and a vacuum pumping component are installed on the port of the filling container, the utility model can rapidly measure the desorption capacity of the low-temperature adsorbent, simulate the stacking state of the low-temperature adsorbent in actual use, can rapidly obtain test data through the weighing and measuring component, the operation is convenient and quick, and the test result is more accurate; and the system can set different vacuum and temperature test environments, so that the test applicability of the system is more extensive and the test result is closer to the actual situation.

Description

Technical Field

[0001] The utility model relates to the technical field of low-temperature adsorbent testing, in particular to a system for quickly testing the desorption capacity of a low-temperature adsorbent in a vacuum environment. Background Art

[0002] Cryogenic adsorbent is a material that can adsorb gas molecules under low temperature conditions. It has the advantages of high adsorption performance, good selectivity and regeneration, and plays a vital role in maintaining the vacuum quality of cryogenic containers.

[0003] At present, the main method for determining the desorption capacity of low-temperature adsorbents is the heating weighing method, which is to measure the change in weight before and after heating by weighing, and measure the content of adsorbed water vapor impurities. However, this scheme still has the following two shortcomings:

[0004] 1. The sample quantity of the above method is too small. Due to the limitation of heating equipment, the sample is usually only a few dozen grams and spread on the tray, which is different from the actual measurement results of a large number of overlapping low-temperature adsorbents;

[0005] 2. The above method is generally measured in the atmospheric environment, and the adsorbent has a strong adsorption capacity in the atmospheric environment. The measured data has corresponding errors. The room temperature test temperature is also different from the actual working temperature of the low-temperature adsorbent, which is different from the actual working conditions that need to be measured.

[0006] Therefore, a system for quickly measuring the desorption capacity of low-temperature adsorbents in a vacuum environment is needed to solve the above problems. Utility Model Content

[0007] The utility model aims to provide a system for rapidly measuring the desorption capacity of a low-temperature adsorbent under a vacuum environment, so as to solve the problems existing in the prior art proposed in the above-mentioned background technology.

[0008] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0009] A system for rapidly measuring the desorption capacity of a low-temperature adsorbent under a vacuum environment comprises a weighing and measuring component, a heat-insulating component and a stuffing container, wherein the weighing and measuring component is provided with a heat-insulating component, the stuffing container is arranged on the heat-insulating component, the heat-insulating component is used to isolate the heat between the stuffing container and the weighing and measuring component, a heating component is installed on the outer wall of the stuffing container, and a vacuum measuring component and a vacuum pumping component are installed on the port of the stuffing container.

[0010] Preferably, the weighing measurement component includes a recording computer, a weight transmitter and a weighing sensor, the weighing sensor is electrically connected to the weight transmitter, and the weight transmitter is electrically connected to the recording computer.

[0011] Preferably, the thermal insulation assembly includes glass fiber felt and light refractory bricks, the glass fiber felt is arranged on the upper surface of the weighing sensor, the light refractory bricks are arranged on the upper surface of the glass fiber felt, and the filler container is arranged above the light refractory bricks.

[0012] Preferably, the heating component is a split ceramic heating ring, which can wrap and heat the outer wall of the filling container.

[0013] Preferably, the vacuum measuring assembly comprises a filter, a KF quick connector and a vacuum gauge, the filter is connected to the port of the filling container, the filter is connected to the KF quick connector, and the KF quick connector is connected to the vacuum gauge.

[0014] Preferably, the vacuum assembly includes a vacuum valve, a vacuum hose and a vacuum unit, the KF quick connector is connected to the vacuum valve, and the vacuum unit is connected to the vacuum valve via the vacuum hose.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] The utility model can rapidly measure the desorption capacity of the low-temperature adsorbent, simulate the stacking state of the low-temperature adsorbent in actual use, and can rapidly obtain test data through the weighing and measuring components. The operation is convenient and quick, and the test results are more accurate. Moreover, the system can set different vacuum and temperature test environments, so that the test applicability of the system is wider and the test results are closer to the actual situation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0018] In the figure: 1. Recording computer; 2. Weight transmitter; 3. Weighing sensor; 4. Glass fiber felt; 5. Light refractory bricks; 6. Split ceramic heating ring; 7. Low-temperature adsorbent sample; 8. Packing container; 9. Filter; 10. KF quick connector; 11. Vacuum valve; 12. Vacuum gauge; 13. Vacuum hose; 14. Vacuum unit. DETAILED DESCRIPTION

[0019] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0020] See also Figure 1 , the utility model provides the following technical solutions:

[0021] A system for rapidly measuring the desorption capacity of a cryogenic adsorbent under a vacuum environment comprises a weighing and measuring component, a heat-insulating component and a packing container 8. The weighing and measuring component comprises a recording computer 1, a weight transmitter 2 and a weighing sensor 3. The weighing sensor 3 is electrically connected to the weight transmitter 2, and the weight transmitter 2 is electrically connected to the recording computer 1. The weighing sensor 3 is a single-point weighing sensor LFQ-60B, and the weight transmitter 2 is a weight transmitter SQ-0911 with a display, which is used for real-time measurement and recording of weight change data.

[0022] The weighing and measuring component is provided with a heat insulation component, and the stuffing container 8 is arranged on the heat insulation component. The heat insulation component is used to isolate the heat between the stuffing container 8 and the weighing and measuring component. The heat insulation component includes a glass fiber felt 4 and a light refractory brick 5. The glass fiber felt 4 is arranged on the upper surface of the weighing sensor 3, and the light refractory brick 5 is arranged on the upper surface of the glass fiber felt 4. The stuffing container 8 is arranged above the light refractory brick 5; the glass fiber felt 4 is provided with two layers, and each layer is 25 cm thick, which is used for heat insulation to prevent the high temperature of the heating component from affecting the normal operation of the weighing and measuring component; the stuffing container 8 is used to hold samples of low-temperature adsorbents, and the holding capacity is approximately 1-1.5 kg, and the adsorbents are overlapped.

[0023] A heating component is installed on the outer wall of the filling container 8, and the heating component is a split ceramic heating ring 6. The split ceramic heating ring 6 can wrap and heat the outer wall of the filling container 8; the heating range of the split ceramic heating ring 6 is 100°C-450°C, and the insulation temperature can be set to keep the temperature of the heating zone constant.

[0024] A vacuum measuring component and a vacuum pumping component are installed on the port of the filling container 8; the vacuum measuring component includes a filter 9, a KF quick connector 10 and a vacuum gauge 12, the filter 9 is connected to the port of the filling container 8, the filter 9 is connected to the KF quick connector 10, and the KF quick connector 10 is connected to the vacuum gauge 12; since the adsorbent particles are small, the filter 9 can prevent the low-temperature adsorbent sample 7 in the filling container 8 from being accidentally sucked out during the vacuum pumping process, resulting in sample quality loss and affecting the data; the vacuum gauge 12 is used to measure the vacuum value in the filling container 8, and the measurement vacuum range is 0.01-100Pa.

[0025] The vacuum pumping assembly includes a vacuum pumping valve 11, a vacuum pumping hose 13 and a vacuum unit 14. The KF quick connector 10 is connected to the vacuum pumping valve 11, and the vacuum unit 14 is connected to the vacuum pumping valve 11 through the vacuum pumping hose 13. The vacuum pumping assembly is used to evacuate the filling container 8 to keep it within the required vacuum range.

[0026] The working process of the utility model is as follows:

[0027] First, all parts are cleaned and heated in a drying room. After assembly, a helium leak detector is used to detect system leaks without installing samples to ensure that the system leak rate is within 1×10 -10 Pa.m 3 / s or less; connect the weighing sensor 3 and the weight delivery device 2 to the recording computer 1, use this equipment to weigh out a low-temperature adsorbent sample 7 of about 1KG, and then connect each system in turn. In this case, the gross weight M1 of the entire tooling is tested.

[0028] The heating and insulation temperature is set to T1, and the split ceramic heating ring 6 heats the low-temperature adsorbent sample 7 in the packing container 8. At the same time, the vacuum unit 14 is turned on in sequence to evacuate the system, and the total weight M2 with the tooling is recorded in real time at different vacuum degrees. The difference between M1 and M2 is the desorption amount of the adsorbent at each vacuum degree at the corresponding temperature T1. Different temperatures T are set, and the above measurements are repeated to obtain the desorption amount curve of the adsorbent at different temperatures and vacuum degrees.

[0029] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A system for rapidly measuring the desorption capacity of a low-temperature adsorbent under a vacuum environment, characterized in that: The invention comprises a weighing and measuring component, a heat insulating component and a filling container (8), wherein the weighing and measuring component is provided with a heat insulating component, the filling container (8) is arranged on the heat insulating component, the heat insulating component is used to isolate the heat between the filling container (8) and the weighing and measuring component, a heating component is installed on the outer wall of the filling container (8), and a vacuum measuring component and a vacuum pumping component are installed on the port of the filling container (8).

2. The system for rapidly measuring the desorption capacity of a low-temperature adsorbent under a vacuum environment according to claim 1, characterized in that: The weighing measurement component comprises a recording computer (1), a weight transmitter (2) and a weighing sensor (3); the weighing sensor (3) is electrically connected to the weight transmitter (2), and the weight transmitter (2) is electrically connected to the recording computer (1).

3. The system for rapidly measuring the desorption capacity of a low-temperature adsorbent under a vacuum environment according to claim 2, characterized in that: The heat insulation component comprises a glass fiber felt (4) and a light refractory brick (5), wherein the glass fiber felt (4) is arranged on the upper surface of the weighing sensor (3), the light refractory brick (5) is arranged on the upper surface of the glass fiber felt (4), and the filler container (8) is arranged above the light refractory brick (5).

4. The system for rapidly measuring the desorption capacity of a low-temperature adsorbent under a vacuum environment according to claim 1, characterized in that: The heating component is a split ceramic heating ring (6), and the split ceramic heating ring (6) is capable of wrapping and heating the outer wall of the filling container (8).

5. The system for rapidly measuring the desorption capacity of a low-temperature adsorbent under a vacuum environment according to claim 1, characterized in that: The vacuum measuring assembly comprises a filter (9), a KF quick connector (10) and a vacuum gauge (12); the filter (9) is connected to a port of a filling container (8); the filter (9) is connected to a KF quick connector (10); and the KF quick connector (10) is connected to a vacuum gauge (12).

6. The system for rapidly measuring the desorption capacity of a low-temperature adsorbent under a vacuum environment according to claim 5, characterized in that: The vacuum pumping assembly comprises a vacuum pumping valve (11), a vacuum pumping hose (13) and a vacuum unit (14); the KF quick connector (10) is connected to the vacuum pumping valve (11); and the vacuum unit (14) is connected to the vacuum pumping valve (11) via the vacuum pumping hose (13).

Images