TWI620925B - Vocs measurement system with multiple independent measurement subsystem - Google Patents

Abstract

A volatile organic matter mass measurement system with multiple independent measurement subsystems for measuring gas in a gaseous environment, and receiving sample gas at multiple measurement points in different pipelines at the same time For measurement, since the sample gas between different measurement points is transmitted in different pipelines, the sample gas between the plurality of measurement points does not have the problem of cross-contamination.

Description

Volatile Organic Matter Quality Measurement System with Multiple Independent Measurement Subsystems

The present invention relates to a volatile organic matter mass measurement system, and more particularly to a volatilization with multiple independent measurement subsystems for measuring gases at a plurality of measurement points in a gaseous environment. Sexual organic matter quality measurement system.

With the advancement of the human industry, air pollution is gradually increasing. Therefore, all major industrial countries in the world have regulatory standards for the emission of volatile organic compounds (VOCs), and there is a growing trend that industrial gas environments are often required to be retrofitted. A measurement system that measures the composition of volatile organic compounds in a gas.

The above volatile organic substances generally refer to organic compounds which have a boiling point of less than 250 ° C under standard conditions (0 ° C and 760 mmHg), and even some people directly define volatile organic substances as all organically present in the atmosphere in a gaseous state. A compound comprising an organic compound such as total hydrocarbon (THC) or non-methane total hydrocarbon (NMHC).

Volatile organic matter measurement systems typically include a flame ion gas chromatograph (GC-FID) to ionize volatile organic compounds through the flame and utilize the conductive properties of the ions. The electronic signal is detected, and the output signal of the amplifying circuit component can be converted into parameters such as the concentration of volatile organic substances in the gas environment to determine whether the gas in the gas environment meets the emission standard.

However, at present, volatile organic matter mass measurement systems often introduce sample gas between multiple measurement points in a gas environment in the same pipeline because of the problem of pipeline design, and there are multiple measurement points. The problem of cross-contamination between the sample gases and the measurement of the sample gases at multiple measurement points at the same time, thus leading to the questioning accuracy of the measurement of volatile organic substances.

Therefore, how to provide a measurement system for volatile organic substances to solve the problem of cross-contamination of sample gases between a plurality of measurement points, and to achieve a sample gas amount of a plurality of measurement points at the same time Test, it is the technical issue that the current industry is concerned about.

In view of the above disadvantages of the prior art, the present invention provides a volatile organic matter mass measurement system having a plurality of independent measurement subsystems for measuring gases in a gaseous environment, including sequential operations. The gas collection step and the gas chromatography step, the volatile organic matter quality measurement system includes: a gas positive pressure source, a gas negative pressure source, a controller, an oven, a first subsystem and a second subsystem.

The first subsystem has a first sample guiding pipeline for receiving a sample gas of a first measuring point in a gas environment as a gas to be tested and guiding the flow; a first sample gas storage tank; a sample gas storage tank; a first gas chromatography sensing device; and a first gas separation tube for separating a specified gas compound in the gas to be tested in the second sample gas storage tank.

The second subsystem has a second sample guiding pipeline for receiving a sample gas of a second measuring point in the gas environment as a gas to be tested and guiding the flow; a third sample storage tank; a four sample gas storage tank; a second gas chromatography sensing device; and a second gas separation tube for separating the specified gas compound in the gas to be tested in the fourth sample gas storage tank.

The oven has an internal space and a heater, and the heater can heat the internal space to bring the internal space to a predetermined temperature, and avoid the first sample guiding line, the first sample storage tank, and the first space in the internal space. The two sample gas storage tanks, the first gas separation tube, the second sample guiding line, the third sample storage tank, the fourth sample storage tank and the gas to be tested in the second gas separation tube are condensed.

When the first subsystem performs the gas collection step, the controller causes the first sample guiding line, the first sample storage tank, the second sample storage tank and the gas negative pressure source to communicate with each other, and the gas negative pressure is caused The source provides a negative pressure so that the gas to be tested in the first sample guiding line enters and fills the first sample storage tank and the second sample storage tank. When the first subsystem performs the gas chromatography step, the controller interrupts the communication between the first sample guiding line, the first sample storage tank, the second sample storage tank and the gas negative pressure source; And the gas positive pressure source, the first sample storage tank and the first gas chromatography sensing device are connected to each other, and the positive pressure source of the gas is supplied with positive pressure, so that the first sample storage tank is stored for testing The gas enters the first gas chromatography sensing device for analysis and processing; further, the gas positive pressure source, the first gas separation tube, the second sample storage tank and the first gas chromatography sensing device are connected to each other, and The positive pressure source of the gas provides a positive pressure, so that the gas to be tested stored in the second sample storage tank enters the first gas chromatography sensing device for analysis after passing through the first gas separation tube; The guiding pipeline and the gas negative pressure source are connected to each other, and the gas negative pressure source provides a negative pressure, so that the gas to be tested in the first sample guiding pipeline is discharged to the outside.

When the second subsystem performs the gas collection step, the controller causes the second sample guiding line, the third sample storage tank, the fourth sample storage tank and the gas negative pressure source to communicate with each other, and the gas negative pressure source is provided The negative pressure causes the second sample to guide the gas to be tested in the pipeline to enter and fill the third sample storage tank and the fourth sample storage tank. When the second subsystem performs the gas chromatography step, the controller orders the second sample The communication between the guiding pipeline, the third sample storage tank, the fourth sample storage tank and the gas negative pressure source is interrupted; and the gas positive pressure source, the third sample storage tank and the second gas chromatography are sensed The devices are connected to each other, and the positive pressure source of the gas is supplied with a positive pressure, so that the gas to be tested stored in the third sample storage tank enters the second gas chromatography sensing device for analysis and processing; The two gas separation tubes, the fourth sample storage tank and the second gas chromatography sensing device are connected to each other, and the positive pressure source of the gas provides a positive pressure, so that the gas to be tested stored in the fourth sample storage tank passes through After the second gas separation tube enters the second gas chromatography sensing device for analysis; further, the second sample guiding line and the gas negative pressure source are connected to each other, and the gas negative pressure source provides a negative pressure to make the second sample The gas to be tested in the guiding line is discharged to the outside.

Optionally, the first subsystem further includes a first switching valve and a second switching valve, which are disposed in the first sample guiding line, and when the gas collecting step is performed, the first sample storage tank and the first sample After the two sample gas storage tank fills the gas to be tested, the controller causes the first switching valve to interrupt the first sample guiding pipeline to guide the flow of the gas to be tested, and causes the second switching valve to interrupt the first sample guiding pipeline and the gas. The connection of the negative pressure source further causes the first switching valve and the second switching valve to open both ends of the first sample guiding line in the atmosphere, respectively, so that the first sample storage tank and the second sample storage tank The gas pressure of the gas to be tested is substantially in accordance with atmospheric pressure.

Optionally, the second subsystem further includes a third switching valve and a fourth switching valve, which are disposed in the second sample guiding line, and when the gas collecting step is performed, the third sample storage tank and the fourth sample After the gas storage tank fills the gas to be tested, the controller causes the third switching valve to interrupt the second sample guiding pipeline to guide the flow of the gas to be tested, and causes the fourth switching valve to interrupt the second sample guiding pipeline and the gas negative pressure source. Connected, the third switching valve and the fourth switching valve respectively open the two ends of the second sample guiding line in the atmosphere, so that the gas pressure of the gas to be tested in the third sample storage tank and the fourth sample storage tank Substantially in line with atmospheric pressure.

Optionally, the oven further has a first warning device; when the heater heats the internal space of the oven for a period of time, if the temperature of the internal space has not been able to reach the predetermined temperature, and is baked If the box door of the box is not in the normally closed position, the controller causes the first warning device to issue a warning to remind the oven door that the position of the oven door is abnormal; if the temperature of the internal space has not been able to reach the predetermined temperature, and the oven door is in the normal position In the closed position, the controller causes the first alert to issue an alert to alert the heater or the oven of the oven to an abnormality. If the temperature of the internal space has not been able to reach the predetermined temperature, the controller interrupts the first sample guiding line to receive the gas to be measured at the first measuring point in the gas environment, and interrupts the second sample guiding line to receive the gas environment. a second quantity of the gas to be measured, and the gas negative pressure source provides a negative pressure, the first sample guiding line, the first sample storage tank, the second sample storage tank, and the second sample guiding line The gas to be tested in the third sample storage tank and the fourth sample storage tank is discharged to the outside.

Alternatively, the oven comprises two heaters, and the heating of the inner space of the oven is achieved by one of the two heaters. When one of the heaters is abnormal, the other heater is used to heat the internal space. To allow the temperature of the internal space to reach a predetermined temperature.

Optionally, the first gas chromatography sensing device or the second gas chromatography sensing device is a flame ion gas chromatography sensing device, and has a flame generator, an igniter and a second warning device, When the flame generator does not produce a normal flame for a period of time, the controller causes the igniter to ignite the flame generator; when the ignition of the igniter exceeds a predetermined number of times and the flame generator still fails to produce a normal flame, the second warning device is provided A warning is issued to remind the first gas chromatography sensing device or the second gas chromatography sensing device to be abnormal.

Optionally, the present invention further includes a gas processor to process the gas to be discharged from the first subsystem and the second subsystem to the outside to comply with the gas emission standard; and selectively conduct the treated gas The first sample guiding line or the second sample guiding line is used to measure the volatile organic substances, and it is judged whether the treated gas meets the gas emission standard.

Optionally, the present invention further includes two flow meters for respectively disposed in the first sample guiding line and the second sample guiding line for respectively measuring the first sample guiding line and the second sample The flow rate of the gas to be tested in the pipeline is guided to determine whether the first sample guiding pipeline and the second sample guiding pipeline are abnormal. The utility model further comprises a filter and a cleaning valve, wherein the filter is arranged in the first sample guiding line or the second sample guiding line for filtering dust or moisture in the gas to be tested, when the state of the filter is not good The controller causes the cleaning valve to provide airflow to the filter, leaving the dust or moisture remaining on the filter.

Compared with the prior art, the volatile organic matter quality measuring system of the invention with multiple independent measuring subsystems has multiple sample guiding pipelines, and can simultaneously receive multiple measurements at different positions in the gas environment. The sample gas at the point is used as the gas to be tested, so that the sample gases of the plurality of measurement points can be accepted in different pipelines at the same time for measurement, and therefore, the samples at the same time between the plurality of measurement points can be compared. Gas measurement results, and because the sample gas between different measurement points is not transmitted in the same pipeline, there is no cross-contamination problem between the sample gases between the multiple measurement points.

1‧‧‧Volatile Organic Matter Quality Measurement System

11‧‧‧ gas positive pressure source

12‧‧‧ gas negative pressure source

13‧‧‧ Controller

14‧‧‧First subsystem

141‧‧‧First sample guiding line

142‧‧‧First sample gas storage tank

143‧‧‧Second sample storage tank

144‧‧‧First gas chromatography sensing device

145‧‧‧First gas separation tube

146‧‧‧First switching valve

147‧‧‧Second switching valve

148‧‧‧ flowmeter

15‧‧‧Second subsystem

151‧‧‧Second sample guiding line

152‧‧‧ third sample storage tank

153‧‧‧ fourth sample storage tank

154‧‧‧Second gas chromatography sensing device

155‧‧‧Second gas separation tube

156‧‧‧third switching valve

157‧‧‧fourth switching valve

158‧‧‧ flowmeter

16‧‧‧ oven

181‧‧‧ gas processor

182‧‧‧ gas discharge pipeline

183‧‧‧Filter

184‧‧‧cleaning valve

Figure 1 is a block diagram showing the gas collection step of the volatile organic matter mass measurement system of the present invention.

Figure 2 is a block diagram showing the gas chromatography step of the volatile organic matter mass measurement system of the present invention.

Figure 3 is a block diagram of the gas collection step of the volatile organic matter quality measuring system of the present invention for the treated gas.

Figure 4 is a schematic view showing the addition of a filter and a cleaning valve to the sample guiding line in the volatile organic matter mass measuring system of the present invention.

The other aspects of the present invention will be readily understood by those skilled in the art from this disclosure. The invention may also be embodied or applied by other different embodiments. The details of the present invention can be variously modified and changed without departing from the spirit and scope of the invention. In particular, the relative relationship and relative positions of the various elements in the drawings are for illustrative purposes only and are not representative of actual implementation of the invention.

The volatile organic matter mass measurement system of the present invention has a plurality of independent measurement subsystems for measuring gas in a gaseous environment, and the operation includes a gas collection step and a gas chromatography step in sequence. Referring to FIG. 1 to FIG. 2, the volatile organic matter mass measurement system 1 of the present invention has a gas positive pressure source 11, a gas negative pressure source 12, a controller 13, a first subsystem 14, a second subsystem 15, and an oven. 16. The first subsystem 14 includes a first sample guiding line 141, a first sample storage tank 142, a second sample storage tank 143, a first gas chromatography sensing device 144, and a first gas separation. The second subsystem 15 includes a second sample guiding line 151, a third sample storage tank 152, a fourth sample storage tank 153, a second gas chromatography sensing device 154, and a second gas separation. Tube 155.

It should be noted that, in addition to the first subsystem 14 and the second subsystem 15, the volatile organic matter quality measuring system 1 of the present invention can add additional subsystems according to the measurement requirements, that is, the volatile organic organic compound of the present invention. The number of independent measurement subsystems of the mass measurement system is not limited to two, and the sample gases of more than two measurement points can be measured at the same time.

The first and second sample guiding lines 141, 151 can respectively receive the sample gases of the first and second measuring points at different positions in the gas environment as the gas to be tested, and continuously guide the first and second samples respectively. The guide lines 141, 151 flow. Thus, the volatile organic matter mass measurement system 1 of the present invention can measure the sample gases of a plurality of measurement points at the same time, and the sample gas system between the plurality of measurement points is transmitted in different pipelines without There is a problem of sample gas cross-contamination between multiple measurement points, and the sample gas measurement results at the same time between the plurality of measurement points can be compared. Alternatively, as in the embodiment shown in FIG. 4, the sample receiving end of the first and second sample guiding lines 141, 151 may be provided with a filter 183 and a cleaning valve 184. The filter 183 is for filtering dust or moisture in the sample gas received by the first and second sample guiding lines 141, 151. When the filter 183 accumulates excessive dust or moisture to cause a poor condition, the controller 13 can cause the cleaning valve 184 to provide a flushing airflow to the filter 183, leaving the dust or moisture remaining on the filter 183 to leave. Increase the useful life of the filter 183. In addition, the flushing airflow provided by the cleaning valve 184 can be heated by heat treatment to increase the ability to remove dust or moisture from the filter 183.

In addition, the volatile organic matter mass measurement system 1 of the present invention may further be provided with flow meters 148, 158, which are respectively disposed in the first and second sample guiding lines 141, 151 for respectively measuring The flow rate of the gas to be tested in the first and second sample guiding lines 141, 151, if the flow rate of the gas to be measured measured by the flow meter 148, 158 deviates from the expected, represents the first and second samples measured The guiding lines 141, 151 are abnormal. Therefore, the setting of the flow meters 148, 158 can be used to determine whether the first and second sample guiding lines 141, 151 are abnormal, and to facilitate the immediate exclusion of the first and second sample guiding tubes. Abnormalities of the roads 141, 151.

The first gas separation tube 145 is disposed in the first sample guiding line 141 and located between the first gas chromatography sensing device 144 and the second sample storage tank 143 for use in the second sample storage tank 143 pending The specified gas compound is separated from the test gas, and the specified gas compound is separated from the gas to be tested. The second gas separation tube 155 is disposed in the second sample guiding line 151 and located between the second gas chromatography sensing device 154 and the fourth sample storage tank 153 for the fourth sample storage tank 153. The specified gas compound is separated from the gas to be tested, and the specified gas compound is separated from the gas to be tested. In an embodiment of the invention, the first and second gas separation tubes 145, 155 are molecular sieves that only allow the specified methane in the gas to be tested to pass, but are not limited thereto.

As shown in FIGS. 1 to 3, the range of the oven 16 housing is indicated by a broken line, and the first sample guiding line 141, the first sample storage tank 142, and the second sample storing gas in the first subsystem 14 are shown. The tank 143 and the first gas separation tube 145, and the second sample guiding line 151, the third sample storage tank 152, the fourth sample storage tank 153 and the second gas separation tube 155 in the second subsystem 15 are provided. In the inner space of the oven 16 box. The oven 16 has a heater to heat the internal space of the casing to bring the internal space to a predetermined temperature, while avoiding the first sample guiding line 141, the first sample storage tank 142, and the second sample in the internal space. The gas storage tank 143, the first gas separation tube 145, the second sample guiding line 151, the third sample storage tank 152, the fourth sample storage tank 153 and the second gas separation tube 155 are condensed by the gas to be tested. Residual or blocked, increasing the first sample guiding line 141, the first sample storage tank 142, the second sample storage tank 143, the first gas separation tube 145, the second sample guiding line 151, and the third sample The service life of the gas storage tank 152, the fourth sample storage tank 153 and the second gas separation tube 155.

Furthermore, the box of the oven 16 can also optionally be provided with a temperature sensor, a position sensor and a first warning device. The controller 13 can cause the temperature sensor to sense the temperature of the internal space of the cabinet to determine whether the temperature of the internal space of the cabinet reaches a predetermined temperature. The controller 13 can also command the position sensor to sense the position of the box door of the box to determine whether the box door of the box is in the normally closed position.

After the heater heats the internal space of the box for a period of time, if the temperature of the internal space of the box has not been able to reach the predetermined temperature, and the position sensor senses that the box door of the box is not in the normally closed position. , the reason that the temperature of the internal space of the box is not as expected may be that the door is not normally closed and the heat of the inner space of the box is largely lost. At this time, the controller 13 may command the first warning device to issue a warning to remind the operation. The position of the cabinet door is abnormal.

After the heater heats the internal space of the box for a period of time, if the temperature of the internal space of the box has not been able to reach the predetermined temperature, and the position sensor senses that the box door of the box is in the normally closed position, The reason that the temperature of the internal space of the box is not as expected may be that the heater is abnormal and cannot provide heat to the internal space of the box, or the abnormality of the box causes a large amount of heat to escape. At this time, the controller 13 can make the first warning. The device issues a warning to alert the operator that the heater or cabinet is abnormal.

After the heater heats the internal space of the box for a period of time, if the temperature of the internal space of the box has not been able to reach the predetermined temperature, the controller 13 interrupts the first sample guiding line 141 to receive the first in the gas environment. Measure the gas to be tested at the point, and interrupt the second sample guiding line 151 to receive the gas to be tested at the second measuring point in the gas environment, and then let the gas negative pressure source 12 provide a negative pressure to guide the first sample to the pipeline 141. The gas to be tested in the first sample storage tank 142, the second sample storage tank 143, the second sample guiding line 151, the third sample storage tank 152, and the fourth sample storage tank 153 is discharged to the outside. The first sample guiding line 141, the first sample storage tank 142, the second sample storage tank 143, the second sample guiding line 151, and the third sample storage tank 152 in the inner space of the casing are avoided. And condensing with the gas to be tested in the fourth sample storage tank 153 to cause residual or clogging, and increasing the first sample guiding line 141, the first sample storage tank 142, the second sample storage tank 143, and the second The sample guiding line 151, the third sample storage tank 152 and the fourth sample storage tank 153 Service life.

In an embodiment of the present invention, the oven 16 may be provided with two heaters, and the heating of the inner space of the oven 16 is achieved by one of the two heaters. When one of the heaters is abnormal, Another heater replaces the internal space of the oven 16 housing to bring the temperature of the interior of the oven 16 to a predetermined temperature.

When the first subsystem of the present invention performs the gas collection step, the controller 13 can cause the first sample guiding line 141, the first sample storage tank 142, the second sample storage tank 143, and the gas negative pressure source. 12 are connected to each other. Then, the gas negative pressure source 12 is provided with a negative pressure, so that the gas to be tested in the first sample guiding line 141 enters and fills the first sample storage tank 142 and the second sample storage tank 143, and is completed. The step of collecting the gas to be tested in the first subsystem.

In addition, when the second subsystem of the present invention performs the gas collection step, the controller can cause the second sample guiding line 151, the third sample storage tank 152, the fourth sample storage tank 153, and the gas negative pressure source 12 Connected to each other. Next, the gas negative pressure source 12 is provided with a negative pressure, so that the gas to be tested in the second sample guiding line 151 enters and fills the third sample storage tank 152 and the fourth sample storage tank 153, and completes the second The collection step of the gas to be tested by the subsystem.

As shown in the embodiment of Figures 1 and 2, the first sample guiding line 141 of the first subsystem 14 is further provided with a first switching valve 146 and a second switching valve 147, when the first subsystem 14 performs gas collection. In the step, after the first sample storage tank 142 and the second sample storage tank 143 are filled with the gas to be tested, the controller 13 causes the first switching valve 146 to interrupt the first sample guiding line 141 to guide the gas to be tested. Flowing and interrupting the communication of the first sample guiding line 141 with the gas negative pressure source 12. Then, the first switching valve 146 and the second switching valve 147 are respectively caused to open both ends of the first sample guiding line 141 in the atmosphere, so that the first subsystem 14 is the same when performing the gas chromatography step. The product storage tank 142 and the second sample storage tank 143 are capable of facing the first gas phase The tomographic sensing device 144 provides a gas to be tested whose gas pressure substantially conforms to atmospheric pressure, so that the gas pressure of the gas to be tested does not fluctuate.

In addition, the second sample guiding line 151 of the second subsystem 15 is further provided with a third switching valve 156 and a fourth switching valve 157. When the second subsystem 15 performs the gas collecting step, the third sample storage tank 152 is in the third sample storage tank 152. After the fourth sample storage tank 153 fills the gas to be tested, the controller 13 causes the third switching valve 156 to interrupt the second sample guiding line 151 to guide the flow of the gas to be tested, and to interrupt the second sample guiding line 151 and The communication of the gas negative pressure source 12. Next, the third switching valve 156 and the fourth switching valve 157 are respectively caused to open both ends of the second sample guiding line 151 in the atmosphere, so that the second subsystem 15 performs the gas chromatography step, and the third sample is stored. The gas tank 152 and the fourth sample gas storage tank 153 can supply the gas to be tested whose gas pressure is substantially in accordance with atmospheric pressure to the second gas chromatography sensing device 154, so as to prevent the gas pressure of the gas to be tested from fluctuating.

When the first subsystem 14 of the present invention performs the gas chromatography step, the controller 13 causes the first sample guiding line 141, the first sample storage tank 142, the second sample storage tank 143, and the gas negative The communication between the pressure sources 12 is interrupted. Next, the gas positive pressure source 11, the first sample gas storage tank 142 and the first gas chromatography sensing device 144 are connected to each other, and then the gas positive pressure source 11 is supplied with a positive pressure to make the first sample gas storage tank. The stored gas to be tested 142 enters the first gas chromatography sensing device 144 for analysis, and obtains parameters such as the concentration of the volatile organic substance containing the specified gas compound in the gas to be tested.

When the gas chromatography step of the first subsystem 14 is performed, the controller 13 can cause the gas positive pressure source 11, the first gas separation tube 145, the second sample storage tank 143, and the first gas chromatography sensing device. 144 are connected to each other, and then the gas positive pressure source 11 is supplied with a positive pressure, so that the gas to be tested stored in the second sample storage tank 143 enters the first gas chromatography sensing device 144 after passing through the first gas separation tube 145. The analysis process is performed to obtain parameters such as the concentration of the volatile organic substance of the gas compound specified in the gas to be tested.

In addition, when the second subsystem 15 of the present invention performs the gas chromatography step, the controller 13 causes the second sample guiding line 151, the third sample storage tank 152, the fourth sample storage tank 153, and the gas negative The communication between the pressure sources 12 is interrupted. Next, the gas positive pressure source 11, the third sample storage tank 152 and the second gas chromatography sensing device 154 are connected to each other, and then the positive pressure source 11 is supplied with a positive pressure to make the third sample storage tank 152 The stored gas to be tested enters the second gas chromatography sensing device 154 for analysis, and obtains parameters such as the concentration of the volatile organic substance containing the specified gas compound in the gas to be tested.

During the gas chromatography step of the second subsystem 15, the controller 13 further enables the gas positive pressure source 11, the second gas separation tube 151, the fourth sample storage tank 153, and the second gas chromatography to sense The devices 154 are in communication with each other. Then, the gas positive pressure source 11 is provided with a positive pressure, so that the gas to be tested stored in the fourth sample storage tank 153 passes through the second gas separation tube 155 and enters the second gas chromatography sensing device 154 for analysis and processing. And obtaining a parameter such as the concentration of the volatile organic substance of the gas compound specified in the gas to be tested.

Furthermore, the controller 13 can also cause the first and second sample guiding lines 141, 151 and the gas negative pressure source 12 to communicate with each other. Next, the gas negative pressure source 12 is supplied with a negative pressure to discharge the gas to be tested in the first and second sample guiding lines 141, 151 to the outside, and the gas to be tested is reduced to the first and second sample guiding lines 141. The pollution of 151 can increase the service life of the first and second sample guiding lines 141, 151.

In an embodiment of the invention, the first and second gas chromatography sensing devices 144, 154 are flame ion gas chromatography sensing devices, and have a flame generator, a flame detector, an igniter and Second warning device. The flame detector is used to detect whether the flame generator generates a normal flame. When the flame generator does not generate a normal flame for a period of time, the controller 13 commands the igniter to ignite the flame generator. When the ignition of the igniter exceeds a predetermined number of times and the flame generator still fails to produce a normal flame, control The controller 13 commands the second alert to issue an alert to remind the first and second gas chromatography sensing devices 144, 154 to be abnormal and to facilitate troubleshooting.

Further, in the embodiment shown in FIG. 3, the volatile organic matter mass measurement system of the present invention may optionally include a gas processor 181 and a gas discharge line 182. The gas processor 181 is used to treat gases that are to be discharged from the first and second subsystems 14, 15 to the outside, and to remove undesirable gas compounds from the gas to meet general gas emission standards. The gas discharge line 182 receives the gas processed by the gas processor 181. Alternatively, the controller 13 may connect the gas discharge line 182 with the first and second sample guiding lines 141, 151, thereby sequentially performing the gas collection step and gas on the gas of the gas discharge line 182. The phase chromatography step is performed to measure the volatile organic substances therein, and it is judged whether the gas processed by the gas processor 181 conforms to the general gas emission standard, and thus the function of the gas processor 181 is also known.

In summary, the volatile organic matter quality measuring system with multiple independent measuring subsystems provided by the present invention is used for measuring gas in a gas environment, and includes sequential gas collection during operation. The step and the gas chromatography step have a plurality of sample guiding lines, which can simultaneously receive the sample gases of the plurality of measuring points at different positions in the gas environment as the gas to be tested, thus, the quality of the volatile organic compounds of the present invention The measurement system can accept the sample gas of multiple measurement points in different pipelines at the same time for measurement, therefore, the sample gas measurement results at the same time between the plurality of measurement points can be compared, and because of different The sample gas between the measurement points is not transmitted in the same pipeline, so there is no problem of cross-contamination of the sample gases between the plurality of measurement points. In addition, the volatile organic matter quality measuring system of the present invention can provide a high temperature operating environment, and can avoid the gas path of the gas to be tested condensed inside the system, and increase the service life of the internal components of the system.

The above embodiments are merely illustrative of the principles and effects of the invention and are not intended to limit the invention. Modifications and variations of the above-described embodiments can be made by those skilled in the art without departing from the spirit and scope of the invention. Therefore, the scope of the invention should be as defined in the scope of the invention.

Claims (10)

A volatile organic matter mass measurement system having a plurality of independent measurement subsystems for measuring gas in a gaseous environment, the operation comprising a gas collection step and a gas chromatography step in sequence The utility model comprises: a gas positive pressure source; a gas negative pressure source; a controller; the first subsystem has: a first sample guiding pipeline, which receives the sample gas of the first measuring point in the gas environment as a test to be tested Gas and guiding flow; first sample storage tank; second sample storage tank; first gas chromatography sensing device; first gas separation tube for testing in the second sample storage tank Dissolving volatile organic substances in the gas; wherein when the first subsystem performs the gas collection step, the controller causes the first sample guiding line, the first sample storage tank, and the second sample storage tank And the gas negative pressure source communicate with each other, and the gas negative pressure source provides a negative pressure, so that the first sample guides the gas to be tested in the pipeline, enters and fills the first sample gas storage tank and the second a sample gas storage tank; when the first subsystem performs the gas chromatography step The controller interrupts the communication between the first sample guiding line, the first sample storage tank, the second sample storage tank and the gas negative pressure source; and the positive pressure source of the gas a sample gas storage tank and the first gas chromatography sensing device are connected to each other, and The gas positive pressure source provides a positive pressure, so that the gas to be tested stored in the first sample storage tank enters the first gas chromatography sensing device for analysis and processing; and the gas positive pressure source and the first gas are further The separation tube, the second sample storage tank and the first gas chromatography sensing device are connected to each other, and the positive pressure source of the gas provides a positive pressure, so that the gas to be tested stored in the second sample storage tank passes After the first gas separation tube enters the first gas chromatography sensing device for analysis; further, the first sample guiding line and the gas negative pressure source are connected to each other, and the gas negative pressure source provides a negative pressure The second sample system has a second sample guiding line for receiving the sample gas of the second measuring point in the gas environment, so as to discharge the gas to be tested in the first sample guiding line to the outside; As a gas to be tested and guiding the flow; a third sample storage tank; a fourth sample storage tank; a second gas chromatography sensing device; and a second gas separation tube for use in the fourth sample storage tank Volatile organic matter is separated from the gas to be tested; wherein the second subsystem In the gas collection step, the controller causes the second sample guiding line, the third sample storage tank, the fourth sample storage tank and the gas negative pressure source to communicate with each other, and the gas negative pressure source provides a negative pressure , the gas to be tested in the second sample guiding pipeline enters and fills the third sample storage tank and the fourth sample storage tank; when the second subsystem performs the gas chromatography step, The controller interrupts the communication between the second sample guiding line, the third sample storage tank, the fourth sample storage tank and the gas negative pressure source; and the gas positive pressure source and the third sample gas storage The slot and the second gas chromatography sensing device are connected to each other, and The positive pressure source of the gas provides a positive pressure, so that the gas to be tested stored in the third sample storage tank enters the second gas chromatography sensing device for analysis and processing; and further, the positive pressure source and the second gas are separated. The tube, the fourth sample storage tank and the second gas chromatography sensing device are connected to each other, and the positive pressure source of the gas provides a positive pressure, so that the gas to be tested stored in the fourth sample storage tank passes through the After the second gas separation tube enters the second gas chromatography sensing device for analysis; further, the second sample guiding line and the gas negative pressure source are connected to each other, and the gas negative pressure source provides a negative pressure, so that the gas negative pressure source provides a negative pressure The gas to be tested in the second sample guiding line is discharged to the outside; and the oven has an internal space and a heater, and the heater can heat the internal space to reach the predetermined temperature while avoiding the internal The first sample guiding line, the first sample storage tank, the second sample storage tank, the first gas separation tube, the second sample guiding line, the third sample storage tank, and the fourth sample in the space The gas storage tank and the second gas separation pipe are to be tested Coagulated. A volatile organic matter mass measurement system having a plurality of independent measurement subsystems as described in claim 1, wherein the first subsystem further includes a first switching valve and a second switching valve, The first sample guiding line, when performing the gas collecting step, after the first sample gas storage tank and the second sample gas storage tank are filled with the gas to be tested, the controller causes the first switching The valve interrupts the first sample guiding line to guide the flow of the gas to be tested, and causes the second switching valve to interrupt the communication between the first sample guiding line and the gas negative pressure source, and further causes the first switching valve to The second switching valve respectively opens the two ends of the first sample guiding line in the atmosphere, so that the gas pressure of the gas to be tested in the first sample storage tank and the second sample storage tank substantially conforms to atmospheric pressure . The volatile organic matter quality measuring system having a plurality of independent measuring subsystems according to claim 1, wherein the second subsystem further comprises a third switching valve and a fourth switching valve, which are The second sample guiding line, when performing the gas collecting step, in the third sample storage tank After the fourth sample storage tank is filled with the gas to be tested, the controller causes the third switching valve to interrupt the second sample guiding line to guide the flow of the gas to be tested, and the fourth switching valve interrupts the second The sample guiding line is in communication with the gas negative pressure source, and the third switching valve and the fourth switching valve respectively open the two ends of the second sample guiding line in the atmosphere, so that the third sample is stored The gas pressure of the gas to be tested in the gas tank and the fourth sample storage tank substantially conforms to atmospheric pressure. A volatile organic matter quality measuring system having a plurality of independent measuring subsystems according to claim 1, wherein the oven further has a first warning device; when the heater continues to the internal space of the oven After the heating of the time, if the temperature of the internal space has not been able to reach the predetermined temperature, and the door of the oven is not in the normally closed position, the controller causes the first warning device to issue a warning to remind the oven The position of the door is abnormal; if the temperature of the internal space has not been able to reach the predetermined temperature, and the door of the oven is in the normally closed position, the controller causes the first warning device to issue a warning to remind the heater or The oven has an abnormal cabinet. A volatile organic matter mass measurement system having a plurality of independent measurement subsystems as described in claim 4, wherein the controller interrupts the temperature if the temperature of the internal space has not been able to reach the predetermined temperature The first sample guiding pipeline receives the gas to be tested at the first measuring point in the gas environment, and interrupts the second sample guiding pipeline to receive the gas to be tested of the second measuring point in the gas environment, and makes the gas negative pressure The source provides a negative pressure, the first sample guiding line, the first sample storage tank, the second sample storage tank, the second sample guiding line, the third sample storage tank and the fourth sample storage tank The gas to be tested is discharged to the outside. A volatile organic matter mass measurement system having a plurality of independent measurement subsystems as recited in claim 5, wherein the oven comprises two heaters, the heating system of the interior space of the oven By one of the two heaters, when one of the heaters is abnormal, the other heater takes over the heating of the internal space so that the temperature of the internal space can reach the predetermined temperature. The volatile organic matter quality measuring system having a plurality of independent measuring subsystems according to claim 1, wherein the first gas chromatography sensing device or the second gas chromatography sensing device The utility model relates to a flame ion gas chromatography sensing device, which has a flame generator, an igniter and a second warning device. When the flame generator does not generate a normal flame for a period of time, the controller causes the igniter to the flame The generator is ignited; when the ignition of the igniter exceeds a predetermined number of times and the flame generator is still unable to generate a normal flame, the second alert is alerted to notify the first gas chromatography sensing device or the second The gas chromatography sensing device is abnormal. A volatile organic matter quality measuring system having a plurality of independent measuring subsystems as described in claim 1, further comprising a gas processor for processing from the first subsystem and the second subsystem The gas discharged to the outside makes it conform to the gas discharge standard; and can selectively conduct the treated gas to the first sample guiding line or the second sample guiding line, thereby performing the amount of volatile organic substances The test determines whether the treated gas meets the gas emission standards. The volatile organic matter quality measuring system having a plurality of independent measuring subsystems as described in claim 1, further comprising two flow meters respectively disposed on the first sample guiding line and the second a sample guiding line for respectively measuring a flow rate of the gas to be tested in the first sample guiding line and the second sample guiding line, thereby respectively determining the first sample guiding line and the second sample Whether the guiding pipeline is abnormal. A volatile organic matter mass measurement system having a plurality of independent measurement subsystems as described in claim 1, further comprising a filter and a cleaning valve, the filter being disposed on the first sample guiding line or The second sample guiding pipeline is used for filtering dust or moisture in the gas to be tested, when When the state of the filter is not good, the controller causes the cleaning valve to supply airflow to the filter, leaving the dust or moisture remaining on the filter.