A sampling system, sampling method and application of gas fixed emission source

Abstract

The present invention provides a gas fixed emission source sampling system and sampling method, the sampling system includes a sampling device, a flow sensor device, an information calculation device, a flow control processing device and a flow integration device; wherein the sampling device is configured to receive gas from the gas fixed emission source; the flow sensor device is configured to monitor, read and store the wind speed value of the gas; the information calculation device is configured to obtain information processing data according to the wind speed value; the flow control processing device is configured to convert the information processing data into an electromagnetic signal and transmit it to the flow integration device; the flow integration device is configured to obtain sampling data according to the electromagnetic signal. The gas fixed emission source sampling system and sampling method of the present invention can accurately estimate the total gas emissions, realize digital monitoring of the sampling process and obtain information records.

Description

Technical Field

[0001] The present invention relates to the field of gas sampling, and in particular to a sampling system and a sampling method for a fixed gas emission source and applications thereof. Background Art

[0002] Urban air pollutants have attracted the attention of environmental research teams, technical teams and the general public worldwide. After the development of relevant projects in recent years, domestic and foreign research teams have developed relevant research methods for various pollution sources and introduced relevant experimental equipment.

[0003] As we all know, the sampling system and method of gas stationary emission sources are an indispensable basic work for studying waste gas, which has an important impact on the accuracy of the final research results. For gas stationary emission sources, domestic scientific research institutions currently usually use the relevant systems and methods released by the US Environmental Protection Agency. However, due to the specificity of gas stationary emission sources, there is an urgent need for gas stationary emission source sampling systems and methods that can fully adapt to the characteristics of domestic gas stationary emission sources in my country and can accurately control various parameters during the sampling process, so as to provide complete and reliable field work data for subsequent research.

[0004] At present, in the sampling system of fixed emission sources of gas (such as waste gas or waste gas VOC), a sampling pump is usually used to provide a constant flow rate for sampling work within a specified period of time. The system uses the collected sample volume as the product of flow rate and time, and then obtains the mass concentration of the sample through laboratory analysis. The concentration is then used as the average concentration of the gas from the fixed pollution source, thereby obtaining the total gas emissions of the enterprise (the product of the average concentration and the total volume of gas emissions). The disadvantage of this technology is that if the volume flow rate and concentration of the pollution source gas fluctuate during the sampling period, and the sampling pump still provides a constant flow rate, it will have a huge impact on the estimation of the total gas emissions, which will bring greater risks to the investment of enterprises in waste gas treatment and add difficulty to the environmental protection department in making pollution control decisions.

[0005] In addition, there are some sampling systems for fixed gas emission sources that insert a syringe device into the fixed emission source to directly extract gas as an experimental research sample. The disadvantages of this system are: 1. The total amount of gas emissions cannot be accurately estimated; 2. It is impossible to achieve digital monitoring of the sampling process and obtain information records.

[0006] In summary, how to provide a gas fixed emission source sampling system and sampling method that can accurately estimate the total exhaust gas emissions, realize digital monitoring of the sampling process and obtain information records has become a problem that needs to be solved urgently in this field. Summary of the invention

[0007] The object of the present invention is to provide a gas fixed emission source sampling system and method, which can accurately estimate the total amount of gas emissions, realize digital monitoring of the sampling process and obtain information records.

[0008] The objective of the present invention is achieved through the following technical solutions:

[0009] The present invention provides a gas fixed emission source sampling system, characterized in that the sampling system comprises a sampling device (24), a flow sensor device (25), an information calculation device (10), a flow control processing device (9) and a flow integration device (19);

[0010] Wherein, the sampling device (24) is configured to receive gas from a gas fixed emission source (23); the flow sensor device (25) is configured to monitor, read and store the wind speed value of the gas; the information calculation device (10) is configured to obtain information processing data based on the wind speed value; the flow control processing device (9) is configured to convert the information processing data into an electromagnetic signal and transmit it to the flow integration device (19); the flow integration device (19) is configured to obtain sampling data based on the electromagnetic signal; preferably, the sampling data includes the total volume of the gas from the gas fixed emission source (23).

[0011] In one embodiment, the gas fixed emission source sampling system of the present invention also includes a collecting device (13) and a negative pressure pump (18); wherein the negative pressure pump (18) is configured to allow the gas from the gas fixed emission source (23) to enter the sampling device (24), the flow control processing device (9) and the collecting device (13) in sequence; wherein the flow control processing device (9) is configured to adjust the flow rate of the gas from the gas fixed emission source (23) entering the collecting device (13) according to the information processing data obtained from the information computing device (10).

[0012] In one embodiment, in the gas fixed emission source sampling system of the present invention, the sampling device (24) comprises a sampling gun (1), a magnet (2) and a first fixing buckle (3);

[0013] Preferably, the magnet (2) and the first fixing buckle (3) are connected by threads, and the magnet (2) and the sampling gun (1) are combined by magnetic attraction; the magnet (2) and the first fixing buckle (3) are configured to fix the sampling gun (1);

[0014] Preferably, when the gas stationary emission source sampling system is sampling the gas stationary emission source (23), part or all of the sampling gun (1) is located inside the gas stationary emission source (23);

[0015] Preferably, the magnet (2) is a pancake-shaped magnet;

[0016] Preferably, the first fixing buckle (3) is a magnetic fixing buckle;

[0017] Preferably, the magnet (2) and the first fixing buckle (3) move forward and backward on the surface of the sampling gun (1) according to the inner diameter of the gas fixed emission source (23) to adjust the length of the sampling gun (1) extending into the gas fixed emission source (23);

[0018] Preferably, the gas stationary emission source (23) is a waste gas VOC stationary emission source.

[0019] In one embodiment, in the gas fixed emission source sampling system of the present invention, one end of the sampling gun (1) is fixed inside the gas fixed emission source (23), and the other end is connected to the flow sensor device (25);

[0020] Preferably, the flow sensor device (25) comprises a velocity measuring device (20) and a flow anemometer (21) connected in sequence, wherein the velocity measuring device (20) is used to monitor the gas from the gas fixed emission source (23), and the flow anemometer (21) is used to read and store the gas from the gas fixed emission source (23);

[0021] Preferably, the speed measuring device (20) is connected to the sampling gun (1) via a second fixing buckle (4);

[0022] Preferably, the speed measuring device (20) is a speed measuring gun head.

[0023] In one embodiment, in the gas fixed emission source sampling system of the present invention, one end of the sampling gun (1) is fixed inside the gas fixed emission source (23), and the other end is connected to the flow control processing device (9);

[0024] Preferably, the sampling gun (1) is connected to the flow control processing device (9) via a first conduit (6);

[0025] Preferably, the first conduit (6) is fixed to the sampling gun (1) via a second fixing buckle (4);

[0026] Preferably, the first conduit (6) is fixed to the flow control processing device (9) via a third fixing buckle (7);

[0027] Preferably, the third fixing buckle (7) is a fixing knob;

[0028] Preferably, a filter (5) is provided on the first conduit (6);

[0029] Preferably, the filter (5) is a particle filter for filtering particles in gas from a gaseous stationary emission source (23);

[0030] Preferably, the flow control processing device (9) is connected to the collecting device (13) via a second conduit (61);

[0031] Preferably, the collecting device (13) comprises a collecting bag (14), and the collecting bag (14) is used to collect gas from a gaseous fixed emission source;

[0032] Preferably, the second conduit (61) is provided with a first connecting valve (11);

[0033] Preferably, the collecting bag (14) is provided with a fourth conduit (62);

[0034] Preferably, the fourth conduit (62) is provided with a second connecting valve (12), and the second connecting valve (12) is fixed to the top of the collecting device (13);

[0035] Preferably, the first connecting valve (11) and the second connecting valve (12) are connecting valves that cooperate with each other and can be detachably connected or disconnected;

[0036] Preferably, the collecting device (13) is connected to the negative pressure pump (18) via a third conduit (17);

[0037] Preferably, a fourth connecting valve (16) is provided on the third conduit (17);

[0038] Preferably, a third connecting valve (15) is provided on the top of the collecting device (13);

[0039] Preferably, the fourth connecting valve (16) and the third connecting valve (15) are connecting valves that cooperate with each other and can be detachably connected or disconnected;

[0040] Preferably, the collecting device (13) is made of stainless steel;

[0041] Preferably, the collecting bag (14) is a Tedlar collecting bag.

[0042] In one embodiment, in the gas fixed emission source sampling system of the present invention, the second fixing buckle (4) is provided with two holes, which are respectively used to fix the first conduit (6) and the speed measuring device (20);

[0043] Preferably, the second fixing buckle (4) is a rubber fixing buckle or a metal fixing buckle;

[0044] Preferably, the metal fixing buckle is a pancake-shaped metal fixing buckle;

[0045] Preferably, the first conduit (6), the second conduit (61), the fourth conduit (62) and the third conduit (17) are air hoses, preferably Teflon air hoses.

[0046] The present invention also provides a gas stationary emission source sampling method, which uses the gas stationary emission source sampling system according to the present invention to perform sampling, and comprises the following steps:

[0047] (a) the sampling device (24) receives gas from a gas fixed emission source (23) and delivers the gas to the flow sensor device (25);

[0048] (b) the flow sensor device (25) monitors, reads and stores the wind speed value of the gas, and transmits the wind speed value to the information calculation device (10);

[0049] (c) the information calculation device (10) obtains information processing data according to the wind speed value, and then the flow control processing device (9) converts the information processing data into an electromagnetic signal and transmits it to the flow integration device (19);

[0050] (d) The flow integration device (19) calculates sampling data based on the electromagnetic signal; preferably, the sampling data is the total volume of gas from the gas fixed emission source (23).

[0051] In one embodiment, the gas fixed emission source sampling method of the present invention uses the negative pressure pump (18) to allow the gas from the gas fixed emission source (23) to enter the sampling device (24), the flow control processing device (9) and the collection device (13) in sequence; wherein the flow control processing device (9) adjusts the flow rate of the gas from the gas fixed emission source (23) entering the collection device (13) according to the information processing data obtained from the information calculation device (10).

[0052] In one embodiment, in the gas stationary emission source sampling method of the present invention, the information processing data is the actual sampling rate;

[0053] Preferably, an initial sampling rate is set in the information calculation device (10), and the initial real-time wind speed value measured by the flow sensor device (25) is defined as the initial wind speed value, and then the constant K is calculated according to the formula K=sampling rate / wind speed value; then the real-time sampling rate is calculated from the real-time wind speed value according to the constant K.

[0054] In one embodiment, in the gas stationary emission source sampling method of the present invention, the sampling data includes the total volume of gas from the gas stationary emission source (23);

[0055] Preferably, the total gas emission of the gas stationary emission source (23) is calculated according to the following formula:

[0056] Total gas emission=V / K, wherein V is the total volume of gas from the gas stationary emission source (23) obtained in the flow integration device (19).

[0057] The present invention further provides application of the gas stationary emission source sampling system or the gas stationary emission source sampling method according to the present invention in sampling of gas stationary emission sources.

[0058] As we all know, in recent years, relevant topics on urban air pollutant control have been carried out, and domestic and foreign research teams have conducted extensive and in-depth research on various fixed pollution sources (such as VOC). At present, the sampling system of gas fixed emission sources in the existing technology mainly includes sampling tubes, particulate matter filter elements, vacuum pumps and sampling bags. Among them, a sampling pump is used to provide a constant flow rate within a specified period of time for sampling work, and the gas from a specific fixed emission source within a specified period of time is collected by setting a fixed sampling flow rate and sampling time. Then, the mass concentration of the fixed emission source is obtained through laboratory analysis, and the total gas emissions from the fixed emission source (the product of the concentration and the total gas emissions of the pollution source) are obtained at the same time. The disadvantage of the above sampling system is that the emission of gas fixed emission sources is usually pulsed, which makes the stability of the gas flow rate poor. The constant flow rate sampling system will continue to sample when there is no gas emission, which dilutes the concentration of the gas sample, which will cause the wrong determination of the gas emission concentration and total emissions, which will not only lead to the wrong choice of pollution source gas treatment technology by enterprises, but also lead to the wrong formulation of pollution control decisions and measures by environmental management departments.

[0059] The gas fixed emission source sampling system and method described in the present invention is a combination of the sampling device, the flow control device and the flow integration device. The flow integration device can perform time integration on the input signal in the discrete time domain or the continuous time domain to obtain the cumulative input amount within the defined time. In the prior art, the gas sampling flow is mainly controlled manually by a negative pressure pump, which is a time-continuous and fixed flow sampling type, and the sampling amount cannot be adjusted according to the actual situation of the wind speed of the fixed source. The above combination of the present invention introduces the flow integration device and the flow control processing device into the fixed emission source sampling to work, and for the first time uses the information calculation device to couple the flow sensor device, the flow control processing device and the flow integration device in series to form a sampling system for data measurement, signal transmission, data processing, instruction generation, instruction transmission, and automatic control. The flow control processing device adjusts the real-time flow of gas entering the collection device according to the information processing data obtained from the information calculation device, so that the real-time flow can be automatically adjusted at a constant ratio in real time according to the flow dynamics of the gas fixed emission source; at the same time, the flow control processing device transmits the information processing data obtained from the information calculation device to the flow integration device in real time, so that the gas sampling amount of the gas fixed emission source can be accurately and visualized within the specified sampling period.

[0060] Compared with the prior art, the advantages of the gas fixed emission source sampling system and sampling method of the present invention are:

[0061] 1. The gas fixed emission source sampling system of the present invention comprises a sampling device, a flow sensor device, an information calculation device, a flow control processing device and a flow integration device. The collected gas sample is a gas sample dynamically adjusted according to the gas flow of the gas fixed emission source. The mass concentration of the sample can accurately represent the emission concentration of the gas fixed emission source, thereby avoiding the uncertainty of the sample concentration caused by the gas pulse emission, and forming a set of automatically adjustable sampling system, reducing the manual operation procedures and reducing the human errors caused by manual sampling;

[0062] 2. In the gas fixed emission source sampling system of the present invention, the information calculation device obtains information processing data according to the wind speed value of the gas from the gas fixed emission source, and then the flow control processing device converts the information processing data into an electromagnetic signal and transmits it to the flow integration device, and then the flow integration device calculates the sampling data according to the electromagnetic signal; in addition, the flow control processing device adjusts the real-time flow of the gas entering the collection device according to the information processing data obtained from the information calculation device. Therefore, the gas fixed emission source sampling system and method of the present invention can obtain the information of the gas flow and total emission of the gas fixed emission source on site in real time;

[0063] 3. The sampling gun of the present invention is fixed inside the fixed gas emission source and is not limited by the size of the syringe, so that the sampling point is close to the airflow center of the exhaust system of the fixed gas emission source, so the collected gas can accurately represent the emission level of the fixed emission source;

[0064] 4. In the present invention, the flow control processing device adjusts the flow of gas from the gas fixed emission source entering the collection device according to the information processing data obtained from the information calculation device, so that the actual required sample quantity of the gas fixed emission source can be obtained within a predetermined time period.

[0065] In summary, the gas stationary emission source sampling system and sampling method described in the present invention can standardize the sampling procedures of gas stationary emission sources, realize on-site visualization of gas stationary emission source information and sampling information, ensure that the collected samples can truly and effectively represent the gas emission status of the gas stationary emission source, and provide a more scientific basis for environmental management departments to determine and identify whether the pollution source meets the waste gas emission standards and whether it meets the control standards for the total regional waste gas emissions. In addition, during on-site sampling, it is also possible to quickly identify and determine the subjective means of reducing waste gas emission concentrations and total emissions, such as shutting down exhaust devices and reducing exhaust volumes, taken by waste gas emission units in order to reduce environmental protection investment or circumvent environmental supervision. The gas stationary emission source sampling system and sampling method described in the present invention are helpful to promote the reduction and control of total waste gas emissions, alleviate the high incidence of ozone pollution, and are conducive to the improvement of atmospheric environmental quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0066] The embodiments of the present invention are described in detail below with reference to the accompanying drawings, wherein:

[0067] Figure 1 It is a schematic diagram of the gas stationary emission source sampling system of the present invention;

[0068] Figure 2 This is a schematic diagram of the gas stationary emission source sampling system of the present invention when sampling a gas stationary emission source;

[0069] Description of reference numerals:

[0070] 24-sampling device; 1-sampling gun; 2-magnet; 3-first fixing buckle; 4-second fixing buckle; 5-filter; 6-first conduit; 61-second conduit; 62-fourth conduit; 7-third fixing buckle; 9-flow control processing device; 10-information calculation device; 11-first connecting valve; 12-second connecting valve; 13-collecting device; 14-collecting bag; 15-third connecting valve; 16-fourth connecting valve; 17-third conduit; 18-negative pressure pump; 19-flow integration device; 25-flow sensing device; 20-speed measuring device; 21-flow anemometer; 22-data line; 23-gas fixed emission source. DETAILED DESCRIPTION

[0071] The present invention is described below with reference to specific examples. It will be appreciated by those skilled in the art that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention in any way.

[0072] The experimental methods in the following examples are all conventional methods unless otherwise specified.

[0073] Combined with Figure 1 and 2 The specific implementation of the gas fixed emission source sampling system and sampling method of the present invention is as follows, wherein the arrow-shaped (upward) mark in the gas fixed emission source 23 indicates the gas flow direction:

[0074] The gas fixed emission source 23 of the present invention can be a waste gas VOC fixed emission source. Specifically, the gas fixed emission source sampling system includes a sampling device 24, a flow sensor device 25, an information calculation device 10, a flow control processing device 9 and a flow integration device 19; wherein the sampling device 24 is configured to receive gas from the gas fixed emission source 23; the flow sensor device 25 is used to monitor, read and store the wind speed value of the gas; the information calculation device 10 is used to obtain information processing data according to the wind speed value; the flow control processing device 9 is used to convert the information processing data into an electromagnetic signal and transmit it to the flow integration device 19; the flow integration device 19 is used to obtain sampling data according to the electromagnetic signal, and the sampling data is the total volume of the gas from the gas fixed emission source (23).

[0075] The sampling system also includes a collecting device 13 and a negative pressure pump 18; wherein the negative pressure pump 18 is used to allow the gas from the fixed gas emission source 23 to enter the sampling device 24, the flow control processing device 9 and the collecting device 13 in sequence; wherein the flow control processing device 9 adjusts the flow of the gas from the fixed gas emission source 23 into the collecting device 13 according to the information processing data obtained from the information computing device 10. The barrel cover on the collecting device 13 can be opened, and when the barrel cover is in a closed state, it is a metal barrel with good airtightness. For example, the collecting device 13 can be made of stainless steel and can be tested for airtightness. The testing method is determined according to the relevant document USEPA Method 18 of the United States Environmental Protection Agency.

[0076] The sampling device 24 may include a sampling gun 1, a magnet 2 and a first fixing buckle 3. The surface of the sampling device 24 may be provided with a pancake-shaped magnet 2 and a first fixing buckle 3, and the magnet 2 and the first fixing buckle 3 may be fixed or opened by screwing, so as to fix part or all of the sampling gun 1 inside the gas fixed emission source 23. The pancake-shaped magnet 2 and the first fixing buckle 3 in the open state may move back and forth on the surface of the sampling gun 1 according to the actual sampling situation, so as to adapt to the gas fixed emission source 23 system with different inner diameters, so that the collected samples have good representativeness.

[0077] One end of the sampling gun 1 can be fixed inside the gas fixed emission source 23, and the other end can be connected to the flow sensor device 25; the flow sensor device 25 may include a speed measuring device 20 and a flow anemometer 21 connected in sequence; the speed measuring device 20 can be connected to the sampling gun 1 through a second fixing buckle 4; the speed measuring device 20 can be a speed measuring gun head.

[0078] In addition, one end of the sampling gun 1 can be fixed inside the gas fixed emission source 23, and the other end can be connected to the flow control processing device 9; the sampling gun 1 can be connected to the flow control processing device 9 through the first conduit 6; the first conduit 6 can be fixed to the sampling gun 1 through the second fixing buckle 4; the first conduit 6 can be fixed to the flow control processing device 9 through the third fixing buckle 7; the third fixing buckle 7 can be a fixing knob; a filter 5 can be provided on the first conduit 6; the filter 5 can be a particulate filter; the control processing element 9 can be connected to the collection device 13 through the second conduit 61; the collection device 13 can include a collection bag 14, and the collection bag 14 can be a 10L A Tedlar collecting bag can be used to collect gas from a fixed gas emission source 23; a first connecting valve 11 can be provided on the second conduit 61; a fourth conduit 62 can be provided on the collecting bag 14; a second connecting valve 12 can be provided on the fourth conduit 62, and the second connecting valve 12 can be fixed to the top of the collecting device 13; the first connecting valve 11 and the second connecting valve 12 can be connected or disconnected to each other; the collecting device 13 can be connected to a negative pressure pump 18 through a third conduit 17; a fourth connecting valve 16 can be provided on the third conduit 17; a third connecting valve 15 can be provided on the top of the collecting device 13; the fourth connecting valve 16 and the third connecting valve 15 can be connected or disconnected to each other.

[0079] The second fixing buckle 4 may be provided with two holes, which are respectively used to fix the first conduit 6 and the speed measuring device 20; the second fixing buckle 4 may be a rubber fixing buckle or a metal fixing buckle; the metal fixing buckle may be a pancake-shaped metal fixing buckle.

[0080] The first conduit 6 , the second conduit 61 , the third conduit 17 and the fourth conduit 62 may be air-conducting hoses, preferably Teflon air-conducting hoses.

[0081] The gas stationary emission source sampling method of the present invention comprises the following steps:

[0082] (a) The sampling device 24 receives gas from the gas fixed emission source 23 and transports the gas to the flow sensor device 25; (b) The flow sensor device 25 monitors, reads and stores the wind speed value of the gas, and transmits the wind speed value to the information calculation device 10; (c) The information calculation device 10 obtains information processing data based on the wind speed value, and then the flow control processing device 9 converts the information processing data into an electromagnetic signal and transmits it to the flow integration device 19; (d) The flow integration device 19 calculates the sampling data based on the electromagnetic signal. The information calculation device 10 receives the initial real-time wind speed value transmitted by the flow anemometer 21, defines the initial real-time wind speed value as the initial wind speed value, and then calculates the constant K according to the formula K=sampling rate / wind speed value; then calculates the real-time sampling rate from the real-time wind speed value according to the constant K, and transmits the real-time sampling rate to the flow control processing device 9, and the flow control processing device 9 converts the real-time sampling rate into an electromagnetic signal and transmits it to the flow integration device 19. The flow integration device 19 can calculate the total volume of gas sampling within a specified time period according to the electromagnetic signal, wherein the flow integration device 19 receives the sampling flow data transmitted by the flow control processing device in real time, forms an integral function with the sampling volume as the dependent variable and the sampling flow as the integral variable, and outputs the integral result, i.e., the sampling volume, in real time, and realizes the visualization of the sampling volume.

[0083] The flow anemometer 21 can be connected to the information computing device 10 via a data line or wirelessly. The velocity measuring device 20 can be inserted into the sampling gun 1 and fixed by the second fixing buckle 4, the information computing device 10 can be connected to the flow control processing device 9 via a data line or wirelessly, and the flow control processing device 9 can be connected to the flow integration device 19 via a data line or wirelessly.

[0084] The sampling method includes using the negative pressure pump 18 to allow the gas from the gas fixed emission source 23 to enter the sampling device 24, the flow control processing device 9 and the collection device 13 in sequence; wherein the flow control processing device 9 adjusts the flow of the gas from the gas fixed emission source 23 entering the collection device 13 according to the information processing data obtained from the information calculation device 10; the information processing data can be a real-time sampling rate.

[0085] An initial sampling rate is set in the information calculation device 10, and the initial real-time wind speed value measured by the flow sensor device 25 is defined as the initial wind speed value. Then, the constant K is calculated according to the formula K=sampling rate / wind speed value; then, the real-time sampling rate is calculated from the real-time wind speed value according to the constant K.

[0086] The total gas emissions from gaseous stationary emission sources 23 are calculated according to the following formula:

[0087] Total gas emission=V / K, wherein V is the total volume of gas from the gas stationary emission source (23) obtained in the flow integration device (19).

[0088] In summary, in the information computing device, the initial sampling rate (s0) is manually set, and the initial wind speed value (S0) is measured by the flow anemometer, and then the constant K is calculated according to the formula K = sampling rate (s0) / wind speed value (S0). During the sampling process, the real-time sampling rate (s) will change with the change of the real-time wind speed (S) of the exhaust system of the fixed pollution source, where s = KS; after the sampling is completed, the total sampling volume (V) is measured by the flow integration device, and then according to the average sampling rate s 平均 = V / T and calculate the average wind speed S of the gas stationary emission source 23 system 平均 =Ks 平均 Therefore, the total emission of the fixed gas emission source 23 in any time period can be obtained = S 平均 tA, wherein T is the emission time of the gas fixed emission source 23, A is the cross-sectional area of ​​the sampling gun, and t is an arbitrary time period.

[0089] The gas stationary emission source sampling system and gas stationary emission source sampling method of the present invention can be applied in gas stationary emission source sampling.

[0090] In summary, the above description of the specific embodiments of the present invention does not limit the present invention. Those skilled in the art can make various changes or modifications based on the present invention. As long as they do not depart from the spirit of the present invention, they should all fall within the scope of the claims attached to the present invention.

Claims

1. A gas stationary emission source sampling system, characterized in that: The sampling system comprises a sampling device (24), a flow sensor device (25), an information calculation device (10), a flow control processing device (9) and a flow integration device (19); The sampling device (24) is configured to receive gas from a gas fixed emission source (23); the flow sensor device (25) is configured to monitor, read and store the wind speed value of the gas; the information calculation device (10) is configured to obtain information processing data according to the wind speed value; the flow control processing device (9) is configured to convert the information processing data into an electromagnetic signal and transmit it to the flow integration device (19); the flow integration device (19) is configured to obtain sampling data according to the electromagnetic signal; the sampling data includes the total volume of the gas from the gas fixed emission source (23); The sampling system further comprises a collecting device (13), and the flow control processing device (9) is configured to adjust the flow rate of the gas from the gas fixed emission source (23) entering the collecting device (13) according to the information processing data obtained from the information computing device (10); The flow sensor device (25) comprises a velocity measuring device (20) and a flow anemometer (21) connected in sequence, wherein the velocity measuring device (20) is used to monitor the gas from the fixed gas emission source (23), and the flow anemometer (21) is used to read and store the gas from the fixed gas emission source (23). The flow anemometer (21) is connected to the information computing device (10) via a data line or wirelessly, and the information computing device (10) receives the initial real-time wind speed value transmitted by the flow anemometer (21); The information processing data is a real-time sampling rate.

2. The gas stationary emission source sampling system according to claim 1, characterized in that: The sampling system further comprises a negative pressure pump (18); wherein the negative pressure pump (18) is configured to allow the gas from the fixed gas emission source (23) to enter the sampling device (24), the flow control processing device (9) and the collecting device (13) in sequence.

3. The gas stationary emission source sampling system according to claim 2, characterized in that: The sampling device (24) comprises a sampling gun (1), a magnet (2) and a first fixing buckle (3); The magnet (2) and the first fixing buckle (3) are connected by threads, and the magnet (2) and the sampling gun (1) are combined by magnetic attraction; the magnet (2) and the first fixing buckle (3) are configured to fix the sampling gun (1).

4. The gas stationary emission source sampling system according to claim 3, characterized in that: When the gas fixed emission source sampling system is sampling the gas fixed emission source (23), part or all of the sampling gun (1) is located inside the gas fixed emission source (23).

5. The gas stationary emission source sampling system according to claim 3, characterized in that: The magnet (2) is a pancake-shaped magnet.

6. The gas stationary emission source sampling system according to claim 3, characterized in that: The first fixing buckle (3) is a magnetic fixing buckle.

7. The gas stationary emission source sampling system according to claim 3, characterized in that: The magnet (2) and the first fixing buckle (3) move back and forth on the surface of the sampling gun (1) according to the inner diameter of the gas fixed emission source (23) to adjust the length of the sampling gun (1) extending into the interior of the gas fixed emission source (23).

8. The gas stationary emission source sampling system according to claim 3, characterized in that: The gas fixed emission source (23) is a waste gas VOC fixed emission source.

9. The gas stationary emission source sampling system according to claim 3, characterized in that: One end of the sampling gun (1) is fixed inside the fixed gas emission source (23), and the other end is connected to the flow sensor device (25).

10. The gas stationary emission source sampling system according to claim 9, characterized in that: The speed measuring device (20) is connected to the sampling gun (1) via a second fixing buckle (4).

11. The gas stationary emission source sampling system according to claim 9, characterized in that: The speed measuring device (20) is a speed measuring gun head.

12. The gas stationary emission source sampling system according to claim 3, characterized in that: One end of the sampling gun (1) is fixed inside the fixed gas emission source (23), and the other end is connected to the flow control processing device (9).

13. The gas stationary emission source sampling system according to claim 12, characterized in that: The sampling gun (1) is connected to the flow control processing device (9) via a first conduit (6).

14. The gas stationary emission source sampling system according to claim 13, characterized in that: The first conduit (6) is fixed to the sampling gun (1) via a second fixing buckle (4); The first conduit (6) is fixed to the flow control processing device (9) via a third fixing buckle (7).

15. The gas stationary emission source sampling system according to claim 14, characterized in that: The third fixing buckle (7) is a fixing knob.

16. The gas stationary emission source sampling system according to claim 14, characterized in that: The first conduit (6) is provided with a filter (5); The filter (5) is a particle filter for filtering particles in gas from a gaseous stationary emission source (23).

17. The gas stationary emission source sampling system according to claim 14, characterized in that: The flow control processing device (9) is connected to the collecting device (13) via a second conduit (61).

18. The gas stationary emission source sampling system according to claim 17, characterized in that: The collecting device (13) comprises a collecting bag (14), and the collecting bag (14) is used to collect gas from a gaseous fixed emission source; The second conduit (61) is provided with a first connecting valve (11); The collecting bag (14) is provided with a fourth conduit (62); The fourth conduit (62) is provided with a second connecting valve (12), and the second connecting valve (12) is fixed to the top of the collecting device (13); The first connecting valve (11) and the second connecting valve (12) are connecting valves that cooperate with each other and can be detachably connected or disconnected.

19. The gas stationary emission source sampling system according to claim 18, characterized in that: The collecting device (13) is connected to the negative pressure pump (18) via a third conduit (17); The third conduit (17) is provided with a fourth connecting valve (16); A third connecting valve (15) is provided on the top of the collecting device (13); The fourth connecting valve (16) and the third connecting valve (15) are connecting valves that cooperate with each other and can be detachably connected or disconnected.

20. The gas stationary emission source sampling system according to claim 18, characterized in that: The collecting device (13) is made of stainless steel.

21. The gas stationary emission source sampling system according to claim 18, characterized in that: The collecting bag (14) is a Tedlar collecting bag.

22. The gas stationary emission source sampling system according to claim 19, characterized in that: The second fixing buckle (4) is provided with two holes, which are respectively used to fix the first guide tube (6) and the speed measuring device (20).

23. The gas stationary emission source sampling system according to claim 22, characterized in that: The second fixing buckle (4) is a rubber fixing buckle or a metal fixing buckle.

24. The gas stationary emission source sampling system according to claim 23, characterized in that: The metal fixing buckle is a pancake-shaped metal fixing buckle.

25. The gas stationary emission source sampling system according to claim 22, characterized in that: The first conduit (6), the second conduit (61), the fourth conduit (62) and the third conduit (17) are air-conducting hoses.

26. The gas stationary emission source sampling system according to claim 25, characterized in that: The air guide hose is a Teflon air guide hose.

27. A method for sampling a gas stationary emission source, the method using the gas stationary emission source sampling system according to any one of claims 1 to 26 for sampling, comprising the following steps: (a) the sampling device (24) receives gas from a gas fixed emission source (23) and delivers the gas to the flow sensor device (25); (b) the flow sensor device (25) monitors, reads and stores the wind speed value of the gas, and transmits the wind speed value to the information calculation device (10); (c) the information calculation device (10) obtains information processing data according to the wind speed value, and then the flow control processing device (9) converts the information processing data into an electromagnetic signal and transmits it to the flow integration device (19); (d) The flow integration device (19) calculates sampling data based on the electromagnetic signal; the sampling data is the total volume of gas from the gas fixed emission source (23).

28. The method for sampling gas stationary emission sources according to claim 27, characterized in that: The sampling method comprises using a negative pressure pump (18) to allow the gas from a gas fixed emission source (23) to enter the sampling device (24), the flow control processing device (9) and the collection device (13) in sequence; wherein the flow control processing device (9) adjusts the flow rate of the gas from the gas fixed emission source (23) entering the collection device (13) according to the information processing data obtained from the information calculation device (10).

29. The gas stationary emission source sampling method according to claim 27 or 28, characterized in that: An initial sampling rate is set in the information calculation device (10), and the initial real-time wind speed value measured by the flow sensor device (25) is defined as the initial wind speed value. Then, a constant K is calculated according to the formula K=initial sampling rate / initial wind speed value; and then the real-time sampling rate is calculated from the real-time wind speed value according to the constant K; The total gas emission of the gas stationary emission source (23) is calculated according to the following formula: Total gas emission=V / K, wherein V is the total volume of gas from the gas stationary emission source (23) obtained in the flow integration device (19).

30. Use of the gas stationary emission source sampling system according to any one of claims 1 to 26 or the gas stationary emission source sampling method according to any one of claims 27 to 29 in sampling of gas stationary emission sources.

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