CN210154209U - Nitrogen-introducing drying device for sample drying - Google Patents
Nitrogen-introducing drying device for sample drying Download PDFInfo
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- CN210154209U CN210154209U CN201920390010.9U CN201920390010U CN210154209U CN 210154209 U CN210154209 U CN 210154209U CN 201920390010 U CN201920390010 U CN 201920390010U CN 210154209 U CN210154209 U CN 210154209U
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Abstract
The utility model discloses a lead to nitrogen drying device for sample drying, including the drying cabinet, an air inlet and gas outlet have been seted up to the drying cabinet, air inlet and gas outlet pass through the pipeline intercommunication, be equipped with the gas vent on the pipeline, gas vent department is equipped with and is used for controlling air escape's discharge valve, is close to the air inlet be equipped with the nitrogen gas interface on the pipeline, the nitrogen gas interface is equipped with the nitrogen gas control valve, the pipeline passes through nitrogen gas control valve intercommunication nitrogen gas source, be equipped with on the pipeline and be used for taking out gaseous air pump in the drying cabinet, be equipped with the gas humidity testing arrangement who is used for detecting nitrogen gas moisture content on the pipeline. The utility model discloses can cyclic utilization nitrogen gas, practice thrift the nitrogen gas use amount, wholly improve the dry work efficiency of logical nitrogen.
Description
Technical Field
The utility model relates to a sample detection technical field refers in particular to a lead to nitrogen drying device for the sample is dry.
Background
In the technical field of sample detection, a sample which is easy to oxidize often needs to be dried by introducing nitrogen so as to ensure that the sample does not have oxidation reaction to influence a test result. Taking a coal sample as an example, the moisture content of the coal sample is an important index for the valuation of commercial coal, and therefore, in the preparation and experiment processes of the coal sample, the moisture content of the coal sample needs to be measured, and the detection process needs to dry the coal sample.
The existing coal sample drying method mainly comprises an air drying method and a nitrogen introducing drying method. In the case of coal having oxidizing properties such as brown coal, air drying is likely to oxidize the coal sample, and results of the test are inaccurate.
The existing nitrogen-introducing drying method mainly adopts a drying oven to dry a sample, firstly, nitrogen is introduced into the drying oven to discharge air in the drying oven in advance, so that the coal sample is prevented from being oxidized by the air; then heating the drying box to a specified temperature, and continuously introducing nitrogen to dry the coal sample; when the air exchange is required at regular time during the drying process, the air exchange is performed in a manner of exhausting the air in the drying oven while introducing nitrogen. However, nitrogen gas is discharged in the process of discharging the gas in the drying oven, so that waste of nitrogen gas is caused, the experiment cost is increased, a large amount of heat is also taken away by the nitrogen gas, and the newly-entered nitrogen gas also needs to be reheated, so that the overall efficiency of nitrogen introducing drying is greatly reduced.
SUMMERY OF THE UTILITY MODEL
To the technical problem that prior art exists, the utility model provides a nitrogen can cyclic utilization, the energy consumption is lower, drying efficiency is higher be used for the dry logical nitrogen drying device of sample.
In order to solve the technical problem, the utility model discloses a following technical scheme:
the utility model discloses a lead to nitrogen drying device for sample drying, including the drying cabinet, an air inlet and gas outlet have been seted up to the drying cabinet, air inlet and gas outlet pass through the pipeline intercommunication, be equipped with the gas vent on the pipeline, gas vent department is equipped with and is used for controlling air escape's discharge valve, is close to the air inlet be equipped with the nitrogen gas interface on the pipeline, the nitrogen gas interface is equipped with the nitrogen gas control valve, the pipeline passes through nitrogen gas control valve intercommunication nitrogen gas source, be equipped with on the pipeline and be used for taking out gaseous air pump in the drying cabinet, be equipped with the gas humidity testing arrangement who is used for detecting nitrogen gas moisture content on the pipeline.
As a further improvement of the utility model: the pipeline is provided with a control valve for controlling the opening and closing of the circulating gas circuit.
As a further improvement of the utility model: and the pipeline is provided with a water removal filter for removing water in the flowing gas in the pipeline.
As a further improvement of the utility model: and the pipeline is provided with a nitrogen concentration detection device for detecting the concentration of nitrogen in the circulating gas circuit.
As a further improvement of the utility model: and the pipeline is provided with a flow detection device for detecting the gas flow in the circulating gas circuit.
As a further improvement of the utility model: and the pipeline is provided with a speed regulating device for regulating the flow speed of gas in the circulating gas circuit.
As a further improvement of the utility model: the air pump is a variable air pump capable of adjusting the air flow rate in the circulating air path.
As a further improvement of the utility model: the drying cabinet is internally provided with a heater for heating the drying cabinet, a temperature sensor for measuring the temperature in the drying cabinet and a control panel connected with the heater and the temperature sensor.
As a further improvement of the utility model: and a stirring fan used for uniformly mixing nitrogen in the drying oven is arranged in the drying oven.
Compared with the prior art, the utility model has the advantages of:
the utility model provides a lead to nitrogen drying device for sample drying, including air inlet and gas outlet, air inlet and gas outlet pass through the pipeline and communicate, take out nitrogen gas through the air pump, and the device is equipped with the gas humidity testing arrangement who is used for detecting nitrogen gas moisture content, tests nitrogen gas moisture content through gas humidity testing arrangement, and when being greater than or equal to the setting value to nitrogen gas moisture value, then discharges out nitrogen gas; when the moisture value of the nitrogen is smaller than the set value, the nitrogen is refilled into the drying box, so that the cyclic utilization of the nitrogen can be realized; the nitrogen with the moisture content meeting the requirement is recycled, so that the using amount of the nitrogen can be greatly reduced, the utilization rate of the nitrogen is improved, and the cost is saved; in addition, when the next sample is dried by introducing nitrogen, the nitrogen is still kept at a certain temperature after being pumped out and is charged into the drying box again, so that the heating time of the nitrogen is shortened, and the overall working efficiency is improved.
Drawings
Fig. 1 is a schematic structural diagram of an embodiment of the present invention.
Fig. 2 is a schematic diagram of the state of the gas flow inside the drying box when the stirring fan of the present invention is turned on.
Fig. 3 is a schematic diagram illustrating a state of the air flowing inside the drying box when the stirrer fan of the present invention is turned off.
Illustration of the drawings:
100. a drying oven; 101. an air inlet; 102. an air outlet; 1. an exhaust valve; 2. a nitrogen control valve; 3. an air pump; 4. a gas humidity testing device; 5. a control valve; 6. a nitrogen concentration detection device; 7. a flow detection device; 8. a speed regulating device; 9. a stirring fan.
Detailed Description
The invention will be described in further detail with reference to the drawings and specific examples.
As shown in fig. 1 to 3, a nitrogen-introducing drying device for drying samples in this embodiment, including a drying oven 100, an air inlet 101 and an air outlet 102 have been opened in the drying oven 100, the air inlet 101 and the air outlet 102 are communicated through a pipeline, an air outlet is provided on the pipeline, the air outlet is provided with an exhaust valve 1 for controlling air discharge, a nitrogen interface is provided on the pipeline close to the air inlet 101, a nitrogen control valve 2 is provided at the nitrogen interface, the nitrogen interface is communicated with a nitrogen source through the nitrogen control valve 2, an air pump 3 for pumping air in the drying oven 100 is provided on the pipeline, and a gas humidity testing device 4 for detecting a nitrogen humidity condition is provided on the pipeline.
The utility model provides a lead to nitrogen drying device for sample drying, including air inlet 101 and gas outlet 102, air inlet 101 and gas outlet 102 pass through the pipeline intercommunication, take nitrogen gas out through air pump 3, and the device is equipped with gas humidity testing arrangement 4, tests nitrogen gas moisture content through gas humidity testing arrangement 4, and when nitrogen gas moisture value is greater than or equal to the setting value, then discharges out moisture nitrogen gas through discharge valve 1; when the moisture content value of the nitrogen is smaller than the set value, the nitrogen is refilled into the drying box 100; in practical application, as the gas is heated to 105-110 ℃ in the drying box 100, the heated air takes away most of moisture in the circulating gas path, so that only a small part of nitrogen needs to be discharged, most of nitrogen can be recycled, the gas inlet 101 and the gas outlet 102 of the drying box 100 are communicated through one pipeline, the recycling of nitrogen can be realized, the structure is simpler, the number of control valves 5 is reduced, the complexity of opening and closing control of different control valves 5 is reduced, the structure of the whole device is simpler, and the cost is reduced; in addition, when the sample is dried by introducing nitrogen again, the introduced nitrogen is heated, the temperature of the nitrogen is kept constant after the nitrogen is extracted, and the nitrogen is introduced into the drying oven 100 again, so that the heating time of the nitrogen is shortened, and the overall working efficiency is improved.
Further, in the preferred embodiment, in order to ensure that the experimental results of the samples are not affected, after the nitrogen gas having an unsatisfactory moisture content is discharged, new nitrogen gas is replenished by opening the nitrogen gas control valve 2.
Further, in the preferred embodiment, the gas pump 3 is a variable gas pump capable of adjusting the gas flow rate in the circulating gas path.
Further, in a preferred embodiment, the pipeline is provided with a control valve 5 for controlling the opening and closing of the circulating gas path, and the opening and closing of the pipeline is controlled by the control valve 5.
In this embodiment, the pipeline is further provided with a nitrogen concentration detection device 6 for detecting the nitrogen concentration in the circulating gas path.
When the nitrogen-filled drying device for drying the sample is used for drying the sample, firstly, the air pump 3 is opened to enable air to flow between the drying box 100 and the pipeline in a rotating mode to form a circulating air path, then the nitrogen control valve 2 is opened, nitrogen is introduced into the drying box 100 through the air inlet 101, the control valve 5 on the pipeline is closed, and the exhaust valve 1 is opened to enable air in the drying box 100 to be extruded by the nitrogen and exhausted from the pipeline; the nitrogen concentration detection device 6 detects the nitrogen concentration in the circulating gas path and judges whether the nitrogen concentration is higher than a set value A or not, if so, the exhaust valve 1 is closed, and if the nitrogen concentration value is higher than a set value B, the nitrogen control valve 2 is closed.
In this embodiment, still be equipped with the dewatering filter who is used for cleaing away the gaseous moisture of flow in the pipeline on the pipeline, reduce the water content of gas in the circulation gas circuit, can effectively promote work efficiency.
In this embodiment, the pipeline is further provided with a speed regulating device 8 for regulating the flow rate of the gas in the circulating gas path. The nitrogen gas intake and exhaust amounts can be adjusted by setting the speed adjusting device 8, the exhaust valve 1, and the nitrogen control valve 2 in the circulation gas path, so that the nitrogen gas concentration in the dry box 100 can be increased in a desired effective manner (e.g., the nitrogen gas concentration in the dry box 100 can be increased most quickly or economically or in association with a temperature change in the dry box 100 or in association with the degree of oxidation of the sample in the dry box 100).
In this embodiment, the pipeline is provided with the flow detection device 7 for detecting the gas flow in the circulating gas path, and the specific nitrogen amount introduced into the drying oven 100 can be counted by the flow detection device 7, so that in the process of drying the sample, whether the nitrogen control valve 2 needs to be opened to supplement nitrogen into the pipeline can be determined according to the amount of the nitrogen amount.
In order to meet the temperature requirement for nitrogen-feeding drying, in the present embodiment, the drying oven 100 is connected with an auxiliary heating device for controlling the temperature in the drying oven 100. The auxiliary heating device can be a heating oven or other heating devices with heating function and capable of controlling the temperature to be kept in a certain range. In other embodiments, the drying box 100 with a heating function may be employed, and the drying box 100 includes a heater for heating the drying box 100, a temperature sensor for measuring a temperature inside the drying box 100, and a control panel connected to both the heater and the temperature sensor. The heater is arranged in the drying box 100 and used for heating the drying box 100, the temperature sensor is used for measuring the temperature in the drying box 100, when the temperature measured by the temperature sensor meets the temperature required by nitrogen drying, the control panel controls the heater to be kept in the temperature range required by drying, and if the temperature measured by the temperature sensor fails to meet the temperature requirement required by drying, the control panel can control the heater to be heated to the temperature required by drying through man-machine interaction and parameter setting.
In order to make the nitrogen gas introduced into the drying oven 100 more rapidly and uniformly mixed, in this embodiment, a stirring fan 9 for uniformly mixing the nitrogen gas in the drying oven 100 is provided in the drying oven 100. Further, in the preferred embodiment, the air inlet 101 in the drying oven 100 is arranged at the bottom of the drying oven 100, the air outlet 102 is arranged at the top of the drying oven 100, when the nitrogen-introducing drying device for sample drying provided by the utility model is used for experiment, when the experiment is started, the stirring fan 9 in the drying box 100 is firstly closed, the gas enters the drying box 100 through the air inlet 101 through the pipeline, the gas temperature is lower than the gas temperature in the drying box 100, the nitrogen concentration is higher than the nitrogen concentration in the drying box 100, therefore, the gas with high temperature floats upwards, the gas with low temperature sinks, because gas outlet 102 sets up at the top of drying cabinet 100, the air that the higher nitrogen content of temperature is few in drying cabinet 100 can discharge drying cabinet 100 more fast, waits that nitrogen gas concentration detection device 6 detects that the nitrogen gas concentration value satisfies the required setting value of experiment, and stirring fan 9 is rotatory makes the nitrogen gas in drying cabinet 100 mix more evenly.
Above only the utility model discloses an it is preferred embodiment, the utility model discloses a scope of protection not only limits in above-mentioned embodiment, and the all belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope of protection. It should be noted that, for those skilled in the art, a plurality of modifications and decorations without departing from the principle of the present invention should be considered as the protection scope of the present invention.
Claims (10)
1. A lead to nitrogen drying device for sample drying, a serial communication port, including drying cabinet (100), an air inlet (101) and gas outlet (102) have been seted up in drying cabinet (100), air inlet (101) with gas outlet (102) are through the pipeline intercommunication, be equipped with the gas vent on the pipeline, gas vent department is equipped with and is used for controlling air exhaust discharge valve (1), is close to air inlet (101) be equipped with the nitrogen gas interface on the pipeline, the nitrogen gas interface is equipped with nitrogen gas control valve (2), the pipeline passes through nitrogen gas control valve (2) intercommunication nitrogen gas source, be equipped with on the pipeline and be used for taking out gaseous air pump (3) in drying cabinet (100), be equipped with gas humidity testing arrangement (4) that are used for detecting nitrogen gas moisture content on the pipeline.
2. The nitrogen-introducing drying device for sample drying according to claim 1, wherein the pipeline is provided with a control valve (5) for controlling the opening and closing of the circulating gas path.
3. The nitrogen-introducing drying device for drying the sample according to claim 1, wherein the pipeline is provided with a water removal filter for removing water from the gas flowing in the pipeline.
4. The nitrogen-introducing drying device for drying the sample according to claim 1, wherein a nitrogen concentration detection device (6) for detecting the concentration of nitrogen in the circulating gas path is arranged on the pipeline.
5. The nitrogen-introducing drying device for sample drying according to claim 1, wherein the pipeline is provided with a flow detection device (7) for detecting the gas flow in the circulating gas path.
6. The nitrogen-introducing drying device for sample drying according to claim 1, wherein the pipeline is provided with a speed regulating device (8) for regulating the flow rate of gas in the circulating gas path.
7. The nitrogen-feeding drying device for sample drying according to any one of claims 1 to 6, wherein the gas pump (3) is a variable gas pump capable of adjusting the gas flow rate in the circulating gas path.
8. The nitrogen-introducing drying device for sample drying according to any one of claims 1 to 6, wherein the drying oven (100) is connected with an auxiliary heating apparatus for controlling the temperature inside the drying oven (100).
9. The nitrogen-introducing drying device for sample drying according to any one of claims 1 to 6, wherein the drying oven (100) comprises a heater for heating the drying oven (100), a temperature sensor for measuring the temperature inside the drying oven (100), and a control panel connected to both the heater and the temperature sensor.
10. The nitrogen-introducing drying device for drying the sample according to any one of claims 1 to 6, wherein a stirring fan (9) for uniformly mixing the nitrogen in the drying oven (100) is arranged in the drying oven (100).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201920390010.9U CN210154209U (en) | 2019-03-26 | 2019-03-26 | Nitrogen-introducing drying device for sample drying |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201920390010.9U CN210154209U (en) | 2019-03-26 | 2019-03-26 | Nitrogen-introducing drying device for sample drying |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111750625A (en) * | 2019-03-26 | 2020-10-09 | 湖南三德科技股份有限公司 | Nitrogen-introducing drying method and device for sample drying |
| CN111947446A (en) * | 2020-08-21 | 2020-11-17 | 吉林农业大学 | Semiconductor oven nitrogen gas adjusting device |
| CN112034099A (en) * | 2020-08-07 | 2020-12-04 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Electrical equipment SF6Humidity protection and evaluation method for gas test |
-
2019
- 2019-03-26 CN CN201920390010.9U patent/CN210154209U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111750625A (en) * | 2019-03-26 | 2020-10-09 | 湖南三德科技股份有限公司 | Nitrogen-introducing drying method and device for sample drying |
| CN112034099A (en) * | 2020-08-07 | 2020-12-04 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Electrical equipment SF6Humidity protection and evaluation method for gas test |
| CN112034099B (en) * | 2020-08-07 | 2022-04-26 | 中国南方电网有限责任公司超高压输电公司检修试验中心 | Electrical equipment SF6Humidity protection and evaluation method for gas test |
| CN111947446A (en) * | 2020-08-21 | 2020-11-17 | 吉林农业大学 | Semiconductor oven nitrogen gas adjusting device |
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