CN114354851A - Smoke toxicity gas testing arrangement of plastics - Google Patents
Smoke toxicity gas testing arrangement of plastics Download PDFInfo
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- CN114354851A CN114354851A CN202111635264.0A CN202111635264A CN114354851A CN 114354851 A CN114354851 A CN 114354851A CN 202111635264 A CN202111635264 A CN 202111635264A CN 114354851 A CN114354851 A CN 114354851A
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Abstract
The embodiment of the invention provides a plastic smoke toxicity gas testing device, which comprises a degradation component, a gas washing component, a dehumidification component, a detection component and a conveying pipeline, wherein the degradation component is arranged on the gas washing component; one end of the degradation component is provided with an air inlet, and the other end of the degradation component is provided with an air outlet; the degradation assembly is communicated with the gas washing assembly through the matching of the gas outlet and the first pipeline; the first end of the air washing component is communicated with the air outlet through the first pipeline, and the second end of the air washing component is connected with the first end of the dehumidifying component through the second pipeline; the second end of the dehumidification assembly is connected with the third pipeline. The testing device simulates a degradation environment to degrade the sample, and the degraded target gas is subjected to impurity removal and dehumidification and then is detected, so that the release amount of the target gas in the sample degradation process is obtained.
Description
Technical Field
The invention relates to the technical field of cable quality inspection, in particular to a plastic smoke toxic gas testing device.
Background
With the continuous development of social economy and the gradual expansion of urban scale, the demand of people on electric power is continuously increased, and the construction of electric transmission lines becomes an essential important link in the process of electric power development. Because people have an improved awareness of safety, health, environmental quality and the like, the wire and cable which play an important role in our life and production has higher requirements on product quality.
The cable releases a large amount of smoke when thermally degraded, and toxic gases such as hydrogen sulfide and carbon monoxide are generated. The toxic gas can cause stimulation and toxicity to the respiratory system of the human body, cause confusion and harm to people.
Therefore, it is necessary to develop a device capable of testing smoke toxic gases of plastics in cables.
Disclosure of Invention
In view of the above, embodiments of the present invention have been developed to provide a plastic smoke toxic gas testing apparatus that overcomes, or at least partially solves, the above-mentioned problems.
In order to solve the above problems, an embodiment of the present invention discloses a plastic smoke toxicity gas testing device, including: the device comprises a degradation component, a gas washing component, a dehumidification component, a detection component and a conveying pipeline; wherein the delivery conduit comprises a first conduit, a second conduit, and a third conduit;
one end of the degradation component is provided with an air inlet, and the other end of the degradation component is provided with an air outlet; the degradation assembly is communicated with the gas washing assembly through the matching of the gas outlet and the first pipeline;
the first end of the air washing component is communicated with the air outlet through the first pipeline, and the second end of the air washing component is connected with the first end of the dehumidifying component through the second pipeline;
the second end of the dehumidification assembly is connected with the third pipeline;
when a sample is subjected to testing of a discontinuous analytical path, the sample is located within the degradation assembly; the third pipeline is connected with the gas collecting container to collect the target gas; the gas collection container with the target gas is connected with the detection assembly so as to guide the target gas into the detection assembly;
when a sample is tested for a continuous analytical path, the sample is located within the degradation assembly; the third pipeline is connected with the detection assembly.
Optionally, a flow meter is also included; the flowmeter is arranged on the third pipeline.
Optionally, an airflow accelerating assembly is further included; the airflow accelerating assembly is arranged on the third pipeline, and the airflow accelerating assembly is arranged between the dehumidifying assembly and the flowmeter.
Optionally, the airflow accelerating assembly is a blower.
Optionally, a flow control assembly is further included; the flow control assembly is arranged on the third pipeline, and the flow control assembly is arranged between the dehumidification assembly and the airflow acceleration assembly.
Optionally, the flow control assembly is a needle valve.
Optionally, a dust filter assembly is further included; the dust filtering assembly is arranged on the third pipeline, and the dust filtering assembly is arranged between the dehumidifying assembly and the flow control assembly.
Optionally, the degradation component is a tubular electric furnace.
Optionally, the dehumidification assembly is a cold trap.
Optionally, the detection component is an analyzer.
The embodiment of the invention has the following advantages: the device comprises a degradation component, a gas washing component, a dehumidification component, a detection component and a conveying pipeline; wherein the delivery conduit comprises a first conduit, a second conduit, and a third conduit; one end of the degradation component is provided with an air inlet, and the other end of the degradation component is provided with an air outlet; the degradation assembly is communicated with the gas washing assembly through the matching of the gas outlet and the first pipeline; the first end of the air washing component is communicated with the air outlet through the first pipeline, and the second end of the air washing component is connected with the first end of the dehumidifying component through the second pipeline; the second end of the dehumidification assembly is connected with the third pipeline; when a sample is subjected to testing of a discontinuous analytical path, the sample is located within the degradation assembly; the third pipeline is connected with the gas collecting container to collect the target gas; the gas collection container with the target gas is connected with the detection assembly so as to guide the target gas into the detection assembly; when a sample is tested for a continuous analytical path, the sample is located within the degradation assembly; the third pipeline is connected with the detection assembly. The testing device simulates a degradation environment to degrade the sample, and the degraded target gas is subjected to impurity removal and dehumidification and then is detected, so that the release amount of the target gas in the sample degradation process is obtained.
Drawings
FIG. 1 is a schematic structural view of an embodiment of a plastic smoke toxic gas testing apparatus of the present invention;
FIG. 2 is another schematic structural view of an embodiment of the plastic smoke toxic gas testing device of the present invention;
FIG. 3 is a flow chart of the steps of an embodiment of the inventive plastic smoke toxicity testing method.
Description of the drawings: 1. degradation subassembly, 2, scrubbing subassembly, 3, dehumidification subassembly, 4, detection subassembly, 5, strain dirt subassembly, 6, flow control subassembly, 7, air current acceleration subassembly, 8, flowmeter, 9, dry gas meter, 10, gas collection container.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
One of the core ideas of the embodiment of the invention is that the degradation component 1, the gas washing component 2, the dehumidification component 3, the detection component 4 and the conveying pipeline are arranged; wherein the delivery conduit comprises a first conduit, a second conduit, and a third conduit; one end of the degradation component 1 is provided with an air inlet, and the other end of the degradation component 1 is provided with an air outlet; the degradation assembly 1 is communicated with the gas washing assembly 2 through the matching of the gas outlet and the first pipeline; the first end of the air washing component 2 is communicated with the air outlet through the first pipeline, and the second end of the air washing component 2 is connected with the first end of the dehumidifying component 3 through the second pipeline; the second end of the dehumidifying component 3 is connected with the third pipeline; when a sample is subjected to a test of a discontinuous analysis path, said sample is located within said degradation assembly 1; the third pipeline is connected with the gas collecting container 10 to collect the target gas; a gas collection container 10 with the target gas is connected to the detection assembly 4 to introduce the target gas into the detection assembly 4; when a sample is subjected to a test of a continuous analytical path, said sample is located within said degradation assembly 1; the third pipeline is connected with the detection assembly 4. The testing device simulates a degradation environment to degrade the sample, and the degraded target gas is subjected to impurity removal and dehumidification and then is detected, so that the release amount of the target gas in the sample degradation process is obtained.
Referring to fig. 1-2, there are shown schematic structural diagrams of an embodiment of the plastic smoke toxicity gas testing device of the present invention, which may specifically include the following steps:
the device comprises a degradation component 1, a gas washing component 2, a dehumidification component 3, a detection component 4 and a conveying pipeline; wherein the delivery conduit comprises a first conduit, a second conduit, and a third conduit;
one end of the degradation component 1 is provided with an air inlet, and the other end of the degradation component 1 is provided with an air outlet; the degradation assembly 1 is communicated with the gas washing assembly 2 through the matching of the gas outlet and the first pipeline;
the first end of the air washing component 2 is communicated with the air outlet through the first pipeline, and the second end of the air washing component 2 is connected with the first end of the dehumidifying component 3 through the second pipeline;
the second end of the dehumidifying component 3 is connected with the third pipeline;
when a sample is subjected to a test of a discontinuous analysis path, said sample is located within said degradation assembly 1; the third pipeline is connected with the gas collecting container 10 to collect the target gas; a gas collection container 10 with the target gas is connected to the detection assembly 4 to introduce the target gas into the detection assembly 4;
when a sample is subjected to a test of a continuous analytical path, said sample is located within said degradation assembly 1; the third pipeline is connected with the detection assembly 4.
In the embodiment of the application, the degradation component 1, the gas washing component 2, the dehumidification component 3, the detection component 4 and the conveying pipeline; wherein the delivery conduit comprises a first conduit, a second conduit, and a third conduit; one end of the degradation component 1 is provided with an air inlet, and the other end of the degradation component 1 is provided with an air outlet; the degradation assembly 1 is communicated with the gas washing assembly 2 through the matching of the gas outlet and the first pipeline; the first end of the air washing component 2 is communicated with the air outlet through the first pipeline, and the second end of the air washing component 2 is connected with the first end of the dehumidifying component 3 through the second pipeline; the second end of the dehumidifying component 3 is connected with the third pipeline; when a sample is subjected to a test of a discontinuous analysis path, said sample is located within said degradation assembly 1; the third pipeline is connected with the gas collecting container 10 to collect the target gas; a gas collection container 10 with the target gas is connected to the detection assembly 4 to introduce the target gas into the detection assembly 4; when a sample is subjected to a test of a continuous analytical path, said sample is located within said degradation assembly 1; the third pipeline is connected with the detection assembly 4. The testing device simulates a degradation environment to degrade the sample, and the degraded target gas is subjected to impurity removal and dehumidification and then is detected, so that the release amount of the target gas in the sample degradation process is obtained.
Next, the smoke toxic gas testing apparatus of plastic in the present exemplary embodiment will be further described.
In an embodiment of the present application, the scrubbing unit 2 is a scrubbing unit adapted for HCN/NOx and SO 2.
In an embodiment of the present application, a flow meter 8 is further included; the flow meter 8 is provided in the third conduit.
In one embodiment of the present application, the air flow accelerating assembly 7 is further included; the airflow accelerating assembly 7 is arranged on the third pipeline, and the airflow accelerating assembly 7 is arranged between the dehumidifying assembly 3 and the flowmeter 8.
As an example, the gas flow accelerating assembly 7 is a blower that causes gas to flow by compressing the gas.
In one embodiment of the present application, the device further comprises a flow control assembly 6; the flow control assembly 6 is arranged on the third pipeline, and the flow control assembly 6 is arranged between the dehumidifying assembly 3 and the airflow accelerating assembly 7.
As an example, the flow control assembly 6 is a needle valve.
In one embodiment of the present application, the dust filter assembly 5 is further included; the dust filtering component 5 is arranged on the third pipeline, and the dust filtering component 5 is arranged between the dehumidifying component 3 and the flow control component 6.
As an example, the dust filter assembly 5 is a dust filter.
In an embodiment of the present application, the degradation assembly 1 is a tubular electric furnace.
In a specific implementation, a temperature probe is arranged in the tubular electric furnace and is used for measuring the temperature in the tubular electric furnace.
In an embodiment of the present application, the dehumidifying component 3 is a cold trap.
In one embodiment of the present application, the detecting component 4 is an analyzer.
As an example, the analyzer is a gas analyzer that can detect carbon monoxide, carbon dioxide, and nitric oxide.
It should be noted that the gas collecting container 10 may be a gas collecting bag or a gas collecting bottle.
In one embodiment of the present application, when a sample is subjected to a test of a discontinuous analysis path, the sample is placed in a tubular electric furnace, and a degradation environment of the sample is simulated by the tubular electric furnace to generate a degradation gas, i.e., a target gas; the target gas enters the gas washing component 2 through the first pipeline for impurity removal, and the target gas after impurity removal enters the dehumidifying component 3 through the second pipeline for dehumidification; and then, collecting the dehumidified target gas discharged by the third pipeline through a gas collection container 10, and finally introducing the target gas in the gas collection container 10 into an analyzer for detection so as to obtain the amount of the target gas released by the sample.
In a specific implementation, a dry gas meter 9(SO2 — continuous only mode) is also provided on the third pipeline, and the dry gas meter 9 is located between the flow meter 8 and the gas collection container 10.
In one embodiment of the present application, when a sample is subjected to a test of a continuous analysis path, the sample is placed in a tubular electric furnace, and a degradation environment of the sample is simulated by the tubular electric furnace to generate a degradation gas, i.e., a target gas; the target gas enters the gas washing component 2 through the first pipeline for impurity removal, and the target gas after impurity removal enters the dehumidifying component 3 through the second pipeline for dehumidification; and then introducing the dehumidified target gas into an analyzer for detection through the third pipeline so as to obtain the amount of the target gas released by the sample.
In one implementation, a dry gas meter 9 is connected to the outlet of the analyzer.
It should be noted that, for simplicity of description, the method embodiments are described as a series of acts or combination of acts, but those skilled in the art will recognize that the present invention is not limited by the illustrated order of acts, as some steps may occur in other orders or concurrently in accordance with the embodiments of the present invention. Further, those skilled in the art will appreciate that the embodiments described in the specification are presently preferred and that no particular act is required to implement the invention.
Referring to fig. 3, a flow chart of steps of an embodiment of the inventive plastic smoke toxicity gas testing method is shown, which tests the release amount of a target gas under thermal degradation conditions by a testing device; wherein, the testing device comprises a degradation component 1 and a detection component 4; the method specifically comprises the following steps: wherein a content-location map of the target gas is pre-established in the detection assembly 4;
s110, standing the sample according to a set temperature and humidity program;
s120, degrading the sample and the combustion-supporting gas in the degradation assembly 1 according to a set temperature program to obtain the target gas;
s130, introducing the target gas into the detection assembly 4 to obtain the position of the target gas in the content-position diagram so as to determine the release amount of the target gas.
In the embodiment of the present application, a content-location map of the target gas is pre-established in the detection assembly 4; standing the sample according to a set temperature and humidity program; degrading a sample and combustion-supporting gas in the degradation assembly 1 according to a set temperature program to obtain the target gas; and introducing the target gas into the detection assembly 4 to obtain the position of the target gas in the content-position diagram so as to determine the release amount of the target gas. The target gas collected by simulating a degradation environment is tested, and a content-position diagram of the target gas is pre-established in the detection assembly 4 to test the target gas, so that the release amount of the target gas can be accurately obtained according to the content-position diagram of the target gas.
Next, the smoke toxic gas test method of the plastic in this exemplary embodiment will be further described.
The target gas may be carbon monoxide, carbon dioxide, and/or nitric oxide, but may be other gases.
In step S110, the sample is left standing according to the set temperature and humidity program.
In an embodiment of the present application, a specific process of "standing the sample according to the set temperature and humidity program" in step S110 may be further described with reference to the following description.
The sample is allowed to stand for at least 48 hours at a temperature of 20-25 ℃ and a relative humidity of 50-55%, as described in the following procedure.
As an example, the sample is chopped and weighed, and the resulting sample is allowed to stand at a temperature of (23. + -. 2 ℃ C. and a relative humidity of (50. + -. 5)% for at least 24-72 hours.
In one implementation, the sample is chopped and weighed (1.000 ± 0.050) grams, and the resulting sample is then allowed to stand at a temperature of 21 ℃, 22 ℃, 23 ℃, or 24 ℃ and a relative humidity of 51%, 52%, 53%, or 54% for at least 48 hours.
And as stated in step S120, degrading the sample and the combustion-supporting gas in the degradation assembly 1 according to a set temperature program to obtain the target gas.
In an embodiment of the present application, a specific process of "degrading the sample and the combustion-supporting gas in the degradation assembly 1 according to a set temperature program to obtain the target gas" in step S120 can be further described with reference to the following description.
Heating a sample and combustion-supporting gas to 700-900 ℃ in the degradation assembly 1 for degradation to obtain the target gas;
the combustion-supporting gas is a mixed gas having a predetermined oxygen content, and the mixed gas does not react with the target gas.
In a specific implementation, the sample and the combustion-supporting gas are heated to 800 ℃ in the degradation assembly 1 for degradation, and the degraded target gas is collected.
In an embodiment of the present application, a specific process before "degrading the sample and the combustion-supporting gas in the degradation assembly 1 according to the set temperature program to obtain the target gas" in step S120 can be further described with reference to the following description.
The degradation assembly 1 is preheated to a specified temperature as described in the following steps.
In a specific implementation, the degradation assembly 1 is preheated to 100 ℃, 200 ℃, 300 ℃, 400 ℃, 500 ℃ or 600 ℃ for about one hour.
In step S130, the target gas is introduced into the detection component 4, and the position of the target gas in the content-position diagram is obtained, so as to determine the released amount of the target gas.
In another embodiment of the present application, a specific process before "degrading the sample and the combustion-supporting gas in the degradation assembly 1 according to the set temperature program to obtain the target gas" in step S120 can be further described with reference to the following description.
Degrading a sample and combustion-supporting gas in the degradation assembly 1 according to a set temperature program to generate the target gas;
removing impurities from the target gas through the gas washing assembly 2 to obtain dehumidified target gas; or/and;
as described in the following steps, the target gas is dehumidified by the dehumidifying component 3, so as to obtain a dehumidified target gas.
In a specific implementation, the sample is placed in the degradation assembly 1, the combustion-supporting gas is introduced into the degradation assembly 1, and then the temperature is raised to 800 ℃; at the moment, the target gas is generated in the degradation assembly 1, the target gas is conveyed to the gas washing assembly 2 through a conveying pipeline, impurities are removed from the target gas by the gas washing assembly 2, and the gas after impurity removal is dehumidified through the dehumidifying assembly 3 to obtain the dehumidified target gas.
In an embodiment of the present application, a specific process of "pre-establishing a content-location map of the target gas in the detection assembly 4" in the step of "may be further described in conjunction with the following description.
Calibrating the zero value of the detection assembly 4 by means of an inert gas, as described in the following steps;
the full value of the detection assembly 4 is calibrated by a preset concentration of the target gas, as described in the following steps.
As an example, an inert gas is introduced into the detection assembly 4, and the detection assembly 4 detects the position of the target gas and takes the position of the target gas as a zero value of the target gas.
In a specific implementation, the inert gas is nitrogen.
As an example, at a certain intake air flow rate, a preset concentration of target gas (the content of the target gas at that concentration can be calculated) is introduced into the detection assembly 4, the detection assembly 4 detects the location of the target gas at that concentration, and the location of the target gas at that concentration is taken as the full value of the current target gas.
In one specific implementation, carbon monoxide gas with an actual concentration of 1g/ml is introduced into the detection assembly 4 at an intake air flow rate of 1-2L/min, the detection assembly 4 detects that the current concentration of the carbon monoxide gas is 0.8g/ml, the corresponding relation of the concentrations before and after the test is taken as a reference, and the content of the carbon monoxide gas with the current concentration is taken as a full value (namely, a maximum value) of the carbon monoxide gas, so as to check the measurement accuracy.
In an embodiment of the present application, a specific process of "introducing the target gas into the detection assembly 4 to obtain the position of the target gas in the content-position diagram to determine the release amount of the target gas" in step S130 may be further described with reference to the following description.
Introducing the target gas into the detection assembly 4 through the conveying pipeline at a set gas inlet flow rate to obtain the position of the target gas in the content-position diagram so as to determine the release amount of the target gas; or;
the target gas is collected at the outlet of the delivery duct by a gas collection vessel 10, as described in the following steps.
As an example, the target gas is introduced into the detection assembly 4 through the delivery pipe at an inlet flow rate of 1-2L/min, and the position of the target gas in the content-position diagram is obtained to determine the release amount of the target gas.
In one specific implementation, when the target gas is continuously introduced into the detection component 4, the detection component 4 records the change of the current target gas content (or concentration) with time, and draws a continuous curve in the content-position graph, so as to obtain the release amount of the target gas.
While preferred embodiments of the present invention have been described, additional variations and modifications of these embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the embodiments of the invention.
Finally, it should also be noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or terminal that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or terminal. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or terminal that comprises the element.
The above detailed description is provided for the plastic smoke toxicity gas testing device provided by the present invention, and the principle and the implementation manner of the present invention are explained in the present text by applying specific examples, and the above description of the examples is only used to help understanding the method of the present invention and the core idea thereof; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. A plastic smoke toxic gas testing device, comprising: the device comprises a degradation component, a gas washing component, a dehumidification component, a detection component and a conveying pipeline; wherein the delivery conduit comprises a first conduit, a second conduit, and a third conduit;
one end of the degradation component is provided with an air inlet, and the other end of the degradation component is provided with an air outlet; the degradation assembly is communicated with the gas washing assembly through the matching of the gas outlet and the first pipeline;
the first end of the air washing component is communicated with the air outlet through the first pipeline, and the second end of the air washing component is connected with the first end of the dehumidifying component through the second pipeline;
the second end of the dehumidification assembly is connected with the third pipeline;
when a sample is subjected to testing of a discontinuous analytical path, the sample is located within the degradation assembly; the third pipeline is connected with the gas collecting container to collect the target gas; the gas collection container with the target gas is connected with the detection assembly so as to guide the target gas into the detection assembly;
when a sample is tested for a continuous analytical path, the sample is located within the degradation assembly; the third pipeline is connected with the detection assembly.
2. The testing device of claim 1, further comprising a flow meter; the flowmeter is arranged on the third pipeline.
3. The testing device of claim 2, further comprising an airflow accelerating assembly; the airflow accelerating assembly is arranged on the third pipeline, and the airflow accelerating assembly is arranged between the dehumidifying assembly and the flowmeter.
4. The testing device of claim 3, wherein the airflow accelerating assembly is a blower.
5. The testing device of claim 3, further comprising a flow control assembly; the flow control assembly is arranged on the third pipeline, and the flow control assembly is arranged between the dehumidification assembly and the airflow acceleration assembly.
6. The testing device of claim 5, wherein the flow control assembly is a needle valve.
7. The testing device of claim 5, further comprising a dust filter assembly; the dust filtering assembly is arranged on the third pipeline, and the dust filtering assembly is arranged between the dehumidifying assembly and the flow control assembly.
8. The testing device of claim 5, wherein the degradation component is a tubular electric furnace.
9. The testing device of claim 5, wherein the dehumidifying component is a cold trap.
10. The testing device of claim 5, wherein the detection component is an analyzer.
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| CN202111635264.0A CN114354851A (en) | 2021-12-29 | 2021-12-29 | Smoke toxicity gas testing arrangement of plastics |
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| CN202111635264.0A CN114354851A (en) | 2021-12-29 | 2021-12-29 | Smoke toxicity gas testing arrangement of plastics |
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2021
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| WO1995016904A1 (en) * | 1993-12-14 | 1995-06-22 | USINOR SACILOR (Société Anonyme) | Fast continuous gas mixture analysis method and device |
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