CN109490025B - Constant pressure flue gas sampling device and flue gas analysis system - Google Patents
Constant pressure flue gas sampling device and flue gas analysis system Download PDFInfo
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- CN109490025B CN109490025B CN201910016823.6A CN201910016823A CN109490025B CN 109490025 B CN109490025 B CN 109490025B CN 201910016823 A CN201910016823 A CN 201910016823A CN 109490025 B CN109490025 B CN 109490025B
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- 239000003546 flue gas Substances 0.000 title claims abstract description 98
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 97
- 238000005070 sampling Methods 0.000 title claims abstract description 79
- 238000004868 gas analysis Methods 0.000 title abstract description 6
- 238000010790 dilution Methods 0.000 claims abstract description 47
- 239000012895 dilution Substances 0.000 claims abstract description 47
- 239000007789 gas Substances 0.000 claims abstract description 22
- 238000004458 analytical method Methods 0.000 claims abstract description 12
- 230000005540 biological transmission Effects 0.000 claims abstract description 4
- 238000004891 communication Methods 0.000 claims abstract description 4
- 239000000779 smoke Substances 0.000 claims description 62
- 238000004140 cleaning Methods 0.000 claims description 20
- 235000019504 cigarettes Nutrition 0.000 claims description 12
- 238000010793 Steam injection (oil industry) Methods 0.000 claims description 11
- 238000004064 recycling Methods 0.000 claims description 11
- 238000007865 diluting Methods 0.000 claims description 9
- 238000007599 discharging Methods 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 239000002245 particle Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 238000010926 purge Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 238000002156 mixing Methods 0.000 description 4
- 238000012545 processing Methods 0.000 description 4
- 230000000391 smoking effect Effects 0.000 description 4
- 239000000243 solution Substances 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 230000036541 health Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000001174 ascending effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000003113 dilution method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000013618 particulate matter Substances 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2247—Sampling from a flowing stream of gas
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N1/00—Sampling; Preparing specimens for investigation
- G01N1/02—Devices for withdrawing samples
- G01N1/22—Devices for withdrawing samples in the gaseous state
- G01N1/2247—Sampling from a flowing stream of gas
- G01N2001/2264—Sampling from a flowing stream of gas with dilution
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- Health & Medical Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Biomedical Technology (AREA)
- Molecular Biology (AREA)
- Physics & Mathematics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Sampling And Sample Adjustment (AREA)
Abstract
The invention provides a constant-pressure flue gas sampling device and a flue gas analysis system, and relates to the technical field of mechanical equipment. The constant-pressure flue gas sampling device comprises a flue gas generating assembly, a flue gas dilution pipeline, a flue gas sampling assembly and a driving assembly, wherein the gas outlet end of the flue gas generating assembly is communicated with the inlet end of the flue gas dilution pipeline; the flue gas sampling assembly comprises a bottom fixing tube and a top telescopic bag, the driving assembly comprises a controller, a first driving motor and a connecting rod, a pressure sensor used for detecting pressure in the top telescopic bag is arranged on the top telescopic bag, the pressure sensor is in communication connection with the controller, the controller is electrically connected with the first driving motor, the first driving motor is in transmission connection with the top of the connecting rod, and the bottom of the connecting rod is connected with the top of the top telescopic bag. The flue gas analysis system comprises the constant-pressure flue gas sampling device, and the constant-pressure flue gas sampling device can realize constant-pressure sampling under certain pressure, so that the analysis accuracy is high.
Description
Technical Field
The invention relates to the technical field of mechanical equipment, in particular to a constant-pressure flue gas sampling device and a flue gas analysis system.
Background
The sales of cigarettes and smoking population in China are in an ascending trend, however, high-concentration smoke and some particulate matters are generated in the smoking process, harm is generated to human health, emission of harmful substances in the smoking process is reduced, and focus of attention in the industry is achieved at present. The research on the discharge condition of the particles of the main stream smoke in the smoking process has great significance for improving the quality of cigarettes and reducing the harm to human health.
The particulate matter sampling of the main stream smoke of cigarettes faces the following problems: the method comprises the steps of generating high-concentration smoke after the cigarette is smoked, and directly sampling in a smoke extractor, wherein the smoke needs to be diluted in order to ensure that the smoke concentration is in the range of a measuring instrument; because the smoke extraction process is intermittent, the requirement of continuous sample injection of a measuring instrument is not met, and the smoke quantity is required to be increased to realize integral sampling so as to ensure continuous flow of the smoke in the sampling time; after the smoke is generated, the smoke is easy to collide, so that the smoke is aged, and a larger measurement error is generated, so that the smoke needs to be rapidly sucked to a sampling port for sampling; when the flue gas flows in the pipeline, the temperature and the humidity of the flue gas can be changed, and the temperature and the humidity are controlled, so that the error is reduced; the non-uniformity of the mixing process of the flue gas and air during the dilution process also affects the accuracy of the measurement, so that the mixing of the flue gas and air needs to be enhanced.
When the smoke particles are diluted, the partial pressure of the smoke can be changed, the pressure during sampling can be changed, and the pressure is different from the smoke pressure generated just before in practice, so that the growth of the particles can be influenced, and the sampling under the condition of constant pressure can be avoided.
However, the existing smoke sampling device cannot realize constant pressure sampling, and a device capable of sampling the main stream smoke particles of cigarettes under constant pressure is necessary to be developed and designed.
Disclosure of Invention
The invention aims to provide a constant-pressure flue gas sampling device, which aims to ensure constant pressure during sampling and avoid the influence of pressure change on particle growth.
Another object of the present invention is to provide a flue gas analysis system, which can sample in a constant pressure state, and the overall analysis result is more accurate.
The invention is realized in the following way:
The constant-pressure flue gas sampling device comprises a flue gas generating assembly, a flue gas diluting pipeline, a flue gas sampling assembly and a driving assembly, wherein the gas outlet end of the flue gas generating assembly is communicated with the inlet end of the flue gas diluting pipeline;
The flue gas sampling assembly comprises a bottom fixing pipe and a top telescopic bag, the outlet end of the flue gas dilution pipeline is communicated with the bottom inlet of the bottom fixing pipe, the top of the bottom fixing pipe is fixedly connected with the bottom of the top telescopic bag, and the top telescopic bag is connected with a sampling pipeline;
The drive assembly comprises a controller, a first drive motor and a connecting rod, wherein a pressure sensor for detecting the pressure in the top telescopic bag is arranged on the top telescopic bag, the pressure sensor is in communication connection with the controller, the controller is electrically connected with the first drive motor, the output end of the first drive motor is in transmission connection with the top of the connecting rod, and the bottom of the connecting rod is connected with the top of the top telescopic bag.
Further, in a preferred embodiment of the present invention, folding textures are provided on the side walls of the top pouch to extend and retract under the driving of the connecting rod.
Further, in a preferred embodiment of the present invention, a first valve is disposed on a connection line between the flue gas generating assembly and the flue gas dilution line, and a second valve is disposed on a connection line between the flue gas dilution line and the flue gas sampling assembly.
Further, in a preferred embodiment of the present invention, the flue gas sampling assembly further comprises a recirculation pipe, one end of the recirculation pipe is communicated with the top of the top expansion bag, and the other end of the recirculation pipe is communicated with the bottom fixing pipe;
the air inlet of the sampling pipeline is communicated with the recirculation pipeline, and the sampling pipeline is provided with a sampling valve.
Further, in the preferred embodiment of the invention, the recirculation pipeline is coated with a temperature control sleeve layer, and the temperature control sleeve layer is provided with a feed inlet for feeding temperature control medium and a discharge outlet for outputting the temperature control medium;
the recycling pipeline is also provided with a steam injection pipe, an air outlet of the steam injection pipe is positioned in the recycling pipeline, and the steam injection pipe is provided with a steam regulating valve.
Further, in the preferred embodiment of the present invention, a purge valve is further disposed on the recirculation line, a purge gas feed pipe is disposed on the recirculation line located at one side of the purge valve, a purge gas discharge pipe is disposed on the recirculation line located at the other side of the purge valve, and third valves are disposed on the purge gas feed pipe and the purge gas discharge pipe.
Further, in a preferred embodiment of the present invention, the outlet at the bottom of the recirculation line is connected with four air outlet lines, the outlets of the four air outlet lines enclose a circular cavity, and the outlet of each air outlet line is tangential to the circle in which the circular cavity is located.
Further, in the preferred embodiment of the present invention, a circulation pump for generating suction force is installed in the inner cavity of the bottom fixing tube, a second driving motor is installed on the side wall of the bottom fixing tube, and a circulation fan for generating suction force is installed in the inner cavity of the bottom fixing tube, and an output end of the second driving motor is connected with the circulation fan to drive the circulation fan to rotate.
Further, in a preferred embodiment of the present invention, the flue gas dilution line comprises a venturi dilution tube and an axial flow dilution tube connected in series, the inlet end of the venturi dilution tube is connected to the outlet end of the flue gas generating assembly, the outlet end of the venturi dilution tube is connected to the inlet end of the axial flow dilution tube, and the outlet end of the axial flow dilution tube is connected to the bottom fixing tube.
The smoke analysis system comprises the constant-pressure smoke sampling device, the smoke generation assembly comprises a smoke generation pipe, a cigarette clamping opening is formed in the top of the smoke generation pipe, a suction piston is arranged at the bottom of the smoke generation pipe, the sliding end of the suction piston is located in the smoke generation pipe, the drawing end of the suction piston extends out of the bottom of the smoke generation pipe, and a suction valve is arranged on the smoke generation pipe.
The beneficial effects of the invention are as follows: according to the constant-pressure flue gas sampling device obtained through the design, flue gas is generated through the flue gas generating assembly, the flue gas enters the flue gas sampling assembly after the dilution gas is added through the flue gas dilution pipeline, a pressure sensor on the top telescopic bag is used for detecting pressure and feeding a pressure signal back to the controller, when the pressure in the top telescopic bag exceeds a certain value, the controller drives the connecting rod through the first driving motor so as to drive the top telescopic bag to stretch and retract to adjust the volume, and when the pressure sensor detects that the pressure is a specified value, the controller controls the first driving motor to stop moving. The constant-pressure flue gas sampling device provided by the embodiment of the invention can realize constant-pressure sampling under the specified pressure, and avoids the influence on particles in flue gas.
The embodiment of the invention also provides a smoke analysis system which comprises the constant-pressure smoke sampling device, and can realize constant-pressure sampling under a certain pressure, so that the analysis accuracy is higher.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some examples of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic structural diagram of a constant pressure flue gas sampling device according to an embodiment of the present invention;
fig. 2 is a schematic view of the structure of fig. 1 at the outlet of the end of the recirculation line.
Icon: 100-a constant-pressure flue gas sampling device; 110-a fume generation assembly; 111-a flue gas generating tube; 112-a cigarette clamping opening; 113-a suction piston; 114-a slide end; 115-a pull end; 116-suction valve; 117-first valve; 118-a second valve; 120-flue gas dilution line; 121-a venturi dilution tube; 122-axial flow dilution tube; 130-a flue gas sampling assembly; 131-bottom fixed tube; 132-top telescoping bag; 133-sampling line; 134-pressure sensor; 135-folding texture; 136-sampling valve; 137-a circulation pump; 138-a second drive motor; 139-a circulation fan; 140-a drive assembly; 142-a first drive motor; 143-connecting rods; 150-a recirculation line; 151-a temperature control jacket layer; 152-steam injection pipe; 153-steam regulating valve; 154-cleaning the valve; 155-cleaning gas feed tube; 156-cleaning gas discharging pipe; 157-an outlet line; 158-circular cavity.
Detailed Description
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are some embodiments of the present invention, but not all embodiments. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention. Thus, the following detailed description of the embodiments of the invention, as presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, based on the embodiments of the invention, which are apparent to those of ordinary skill in the art without inventive faculty, are intended to be within the scope of the invention.
In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the present invention, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.
Referring to fig. 1, an embodiment of the present invention provides a constant pressure flue gas sampling apparatus 100, which includes a flue gas generating assembly 110, a flue gas dilution pipeline 120, a flue gas sampling assembly 130, and a driving assembly 140.
The smoke generating assembly 110 comprises a smoke generating tube 111, a cigarette clamping opening 112 is formed in the top of the smoke generating tube 111, a suction piston 113 is arranged at the bottom of the smoke generating tube 111, a sliding end 114 of the suction piston 113 is located in the smoke generating tube 111, a drawing end 115 of the suction piston 113 extends out of the bottom of the smoke generating tube 111, and a suction valve 116 is arranged on the smoke generating tube 111. The cigarette is clamped at the cigarette clamping opening 112 after being ignited, the pulling end 115 of the suction piston 113 is pulled downwards to enable the cigarette to slide downwards in the smoke generating tube 111 to simulate the suction process, and the smoke enters the smoke dilution pipeline 120 after the suction valve 116 and the first valve 117 are opened.
Further, a first valve 117 is disposed on a connecting line between the smoke generating assembly 110 and the smoke diluting line 120, and a second valve 118 is disposed on a connecting line between the smoke diluting line 120 and the smoke sampling assembly 130. The flow of the flue gas is controlled by opening and closing the first valve 117 and the second valve 118, and the plurality of valves provided in the embodiment of the present invention are all existing valves, and the structure and the working principle thereof are not repeated.
The gas outlet end of the smoke generating assembly 110 is communicated with the inlet end of the smoke diluting pipeline 120; the flue gas dilution pipeline 120 comprises a venturi dilution pipe 121 and an axial flow dilution pipe 122 which are connected in series, the air inlet end of the venturi dilution pipe 121 is connected with the air outlet end of the flue gas generating assembly 110, the air outlet end of the venturi dilution pipe 121 is connected with the air inlet end of the axial flow dilution pipe 122, and the air outlet end of the axial flow dilution pipe 122 is communicated with a bottom fixing pipe 131 on the flue gas sampling assembly 130.
Specifically, the venturi dilution tube 121 is an existing venturi tube, and an air inlet tube is disposed at a end of the venturi tube near the smoke generating assembly 110, so that the venturi dilution tube 121 not only plays a role of introducing dilution air, but also enables the flow rate of the gas to be increased and then enter the axial flow dilution tube 122 at the rear end. The axial dilution tube 122 is a commercially available dilution tube with axial flow direction and may be a model DIL-8001 type diluter. The structure and operation of the venturi dilution tube 121 and the axial flow dilution tube 122 are not described in detail.
The flue gas sampling assembly 130 comprises a bottom fixed pipe 131 and a top telescopic bag 132, the outlet end of the flue gas dilution pipeline 120 is communicated with the bottom inlet of the bottom fixed pipe 131, the top of the bottom fixed pipe 131 is fixedly connected with the bottom of the top telescopic bag 132, and the top telescopic bag 132 is connected with a sampling pipeline 133; the driving assembly 140 comprises a controller (not shown), a first driving motor 142 and a connecting rod 143, a pressure sensor 134 for detecting the pressure in the top telescopic bag 132 is arranged on the top telescopic bag 132, the pressure sensor 134 is in communication connection with the controller, the controller is electrically connected with the first driving motor 142, the output end of the first driving motor 142 is in transmission connection with the top of the connecting rod 143, and the bottom of the connecting rod 143 is connected with the top of the top telescopic bag 132.
It should be noted that, the flue gas generated by the flue gas generating assembly 110 is introduced into the flue gas sampling assembly 130 after the dilution gas is introduced through the flue gas dilution line 120. The pressure sensor 134 on the top telescopic bag 132 is used for detecting the pressure and feeding back a pressure signal to the controller, when the pressure in the top telescopic bag 132 exceeds a pressure preset value, the controller controls the first driving motor 142 to drive the connecting rod 143 so as to drive the top telescopic bag 132 to stretch and retract to adjust the volume, and when the pressure sensor 134 detects that the pressure is a specified value, the controller controls the first driving motor 142 to stop driving. The constant-pressure flue gas sampling device 100 provided by the embodiment of the invention can realize constant-pressure sampling under the specified pressure, and avoids the influence on particles in flue gas.
In particular, the controller may be an integrated circuit chip having signal processing capabilities. The controller may be a general-purpose processor including a central processing unit (Central Processing Unit, CPU), a network processor (Network Processor, NP), etc.; but may also be a digital signal processor (DIGITAL SIGNAL Processing, DSP), application SPECIFIC INTEGRATED Circuit (ASIC), field programmable gate array (Field Programmable GATE ARRAY, FPGA) or other programmable logic device, discrete gate or transistor logic device, discrete hardware components. A general purpose processor may be a microprocessor; the processor may be any conventional processor or the like. In this embodiment, the controller may be a processor of STM32 series, such as STM32F103C8T6, STM32F103VET6, or the like, or may be a PLC control system (Programmable Logic Controller). The pressure sensor 18 may be model numbers JYB-KO-PAH, PT124G-111, PT124G-128, PT124B-112, etc. on the Kunlun coast.
Specifically, the side wall of the top pouch 132 is provided with a folding texture 135 to be extended and contracted by the driving of the connection rod 143, and the principle of stretching the top pouch 132 is similar to a screw tube.
Further, a circulation pump 137 for generating suction force is installed in the inner cavity of the bottom fixing tube 131, a second driving motor 138 is installed on the side wall of the bottom fixing tube 131, a circulation fan 139 for generating suction force is installed in the inner cavity of the bottom fixing tube 131, and an output end of the second driving motor 138 is connected with the circulation fan 139 to drive the circulation fan 139 to rotate. The circulating pump 137 and the circulating fan 139 are both existing devices for generating suction force, so that the flue gas can enter the bottom fixed pipe 131 more quickly, and the circulating fan 139 also plays a role in stirring and mixing.
Further, the flue gas sampling assembly 130 further includes a recirculation line 150, one end of the recirculation line 150 communicates with the top of the top telescoping bag 132, and the other end of the recirculation line 150 communicates with the bottom stationary tube 131. The recirculation line 150 is used for adjusting the temperature and humidity of the flue gas, so that the temperature and humidity of the flue gas are in a proper range and are uniformly mixed. The air inlet of the sampling line 133 communicates with the recirculation line 150, and a sampling valve 136 is provided on the sampling line 133.
It should be noted that, the connection between the recirculation line 150 and the top expansion bag 132 is a sealed connection, and the recirculation line 150 may extend into the top expansion bag 132, so that the top expansion bag 132 moves up and down along the pipe wall of the recirculation line 150.
Further, the recirculation pipeline 150 is covered with a temperature control jacket layer 151, and a feed port (not shown) for feeding a temperature control medium and a discharge port (not shown) for outputting the temperature control medium are arranged on the temperature control jacket layer 151; the recirculation pipe 150 is further provided with a steam injection pipe 152, an air outlet of the steam injection pipe 152 is positioned in the recirculation pipe 150, and the steam injection pipe 152 is provided with a steam regulating valve 153. A temperature control jacket 151 is disposed around the recirculation line 150 for placement of heating or cooling mediums to effect heating and cooling of the material within the recirculation line 150. The steam injection pipe 152 is used for introducing steam to increase the humidity of the flue gas.
Further, a cleaning valve 154 is further disposed on the recirculation pipe 150, a cleaning gas feeding pipe 155 is disposed on the recirculation pipe 150 located at one side of the cleaning valve 154, a cleaning gas discharging pipe 156 is disposed on the recirculation pipe 150 located at the other side of the cleaning valve 154, and a third valve (not shown) is disposed on each of the cleaning gas feeding pipe 155 and the cleaning gas discharging pipe 156. After sampling is finished, the second valve 118 and the cleaning valve 154 are closed, clean air is introduced into the cleaning air feed pipe 155, and the clean air is output from the cleaning air discharge pipe 156 to clean the pipeline, so that the influence on the detection accuracy due to the fact that the last sampling residual flue gas is mixed before the next flue gas sampling is avoided.
Referring to fig. 1 and 2, four air outlet pipes 157 are connected to the bottom outlet of the recirculation pipe 150, the outlets of the four air outlet pipes 157 enclose a circular cavity 158, and the outlet of each air outlet pipe 157 is tangential to the circle in which the circular cavity 158 is located. By adopting the air outlet mode, vortex can be formed at the air outlet pipeline 157, which is beneficial to uniform gas mixing.
The embodiment of the invention also provides a smoke analysis system, which comprises the constant pressure smoke sampling device 100, can realize constant pressure sampling under a certain pressure condition, can improve the accuracy of analysis in the smoke analysis process, and is suitable for popularization and application.
In summary, the invention provides a constant pressure flue gas sampling device, which is characterized in that flue gas is generated by a flue gas generating assembly, dilution gas is added through a flue gas dilution pipeline and then enters the flue gas sampling assembly, a pressure sensor on a top telescopic bag is used for detecting pressure and feeding a pressure signal back to a controller, when the pressure in the top telescopic bag exceeds a certain value, the controller drives a connecting rod through a first driving motor so as to drive the top telescopic bag to stretch and retract to adjust the volume, and when the pressure sensor detects that the pressure is a specified value, the controller controls the first driving motor to stop moving. The constant pressure sampling under the specified pressure can be realized, and the influence on particles in the flue gas is avoided.
The embodiment of the invention also provides a smoke analysis system which comprises the constant-pressure smoke sampling device, and can realize constant-pressure sampling under a certain pressure, so that the analysis accuracy is higher.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, and various modifications and variations may be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (4)
1. The constant-pressure flue gas sampling device is characterized by comprising a flue gas generating assembly, a flue gas diluting pipeline, a flue gas sampling assembly and a driving assembly, wherein the air outlet end of the flue gas generating assembly is communicated with the inlet end of the flue gas diluting pipeline;
the flue gas sampling assembly comprises a bottom fixing pipe and a top telescopic bag, the outlet end of the flue gas dilution pipeline is communicated with the bottom inlet of the bottom fixing pipe, the top of the bottom fixing pipe is fixedly connected with the bottom of the top telescopic bag, and the top telescopic bag is connected with a sampling pipeline;
The driving assembly comprises a controller, a first driving motor and a connecting rod, wherein a pressure sensor for detecting the pressure in the top telescopic bag is arranged on the top telescopic bag, the pressure sensor is in communication connection with the controller, the controller is electrically connected with the first driving motor, the output end of the first driving motor is in transmission connection with the top of the connecting rod, and the bottom of the connecting rod is connected with the top of the top telescopic bag;
the flue gas sampling assembly further comprises a recycling pipeline, one end of the recycling pipeline is communicated with the top of the top telescopic bag, and the other end of the recycling pipeline is communicated with the bottom fixing pipe;
the air inlet of the sampling pipeline is communicated with the recirculation pipeline, and the sampling pipeline is provided with a sampling valve;
The recirculation pipeline is coated with a temperature control sleeve layer, and the temperature control sleeve layer is provided with a feed inlet for adding temperature control medium and a discharge outlet for outputting the temperature control medium;
the recycling pipeline is also provided with a steam injection pipe, an air outlet of the steam injection pipe is positioned in the recycling pipeline, and the steam injection pipe is provided with a steam regulating valve;
The recycling pipeline is also provided with a cleaning valve, the recycling pipeline positioned at one side of the cleaning valve is provided with a cleaning gas feeding pipe, the recycling pipeline positioned at the other side of the cleaning valve is provided with a cleaning gas discharging pipe, and the cleaning gas feeding pipe and the cleaning gas discharging pipe are both provided with a third valve;
Four air outlet pipelines are connected to the bottom outlet of the recycling pipeline, the outlets of the four air outlet pipelines are enclosed into a circular cavity, and the outlet of each air outlet pipeline is tangential to the circle in which the circular cavity is located;
A circulating pump for generating suction force is arranged in the inner cavity of the bottom fixing pipe, a second driving motor is arranged on the side wall of the bottom fixing pipe, a circulating fan for generating suction force is arranged in the inner cavity of the bottom fixing pipe, and the output end of the second driving motor is connected with the circulating fan so as to drive the circulating fan to rotate;
The flue gas dilution pipeline comprises a venturi dilution pipe and an axial flow dilution pipe which are connected in series, the air inlet end of the venturi dilution pipe is connected with the air outlet end of the flue gas generation assembly, the air outlet end of the venturi dilution pipe is connected with the air inlet end of the axial flow dilution pipe, and the air outlet end of the axial flow dilution pipe is communicated with the bottom fixing pipe.
2. The constant pressure flue gas sampling device according to claim 1, wherein folding textures are arranged on the side wall of the top telescopic bag so as to extend and retract under the drive of the connecting rod.
3. The constant pressure flue gas sampling device according to claim 1, wherein a first valve is arranged on a connecting pipeline of the flue gas generating assembly and the flue gas diluting pipeline, and a second valve is arranged on a connecting pipeline between the flue gas diluting pipeline and the flue gas sampling assembly.
4. A smoke analysis system, characterized in that the smoke analysis system comprises the constant pressure smoke sampling device according to any one of claims 1-3, the smoke generating component comprises a smoke generating tube, a cigarette clamping opening is arranged at the top of the smoke generating tube, a suction piston is arranged at the bottom of the smoke generating tube, a sliding end of the suction piston is positioned in the smoke generating tube, a drawing end of the suction piston extends out from the bottom of the smoke generating tube, and a suction valve is arranged on the smoke generating tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910016823.6A CN109490025B (en) | 2019-01-08 | 2019-01-08 | Constant pressure flue gas sampling device and flue gas analysis system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910016823.6A CN109490025B (en) | 2019-01-08 | 2019-01-08 | Constant pressure flue gas sampling device and flue gas analysis system |
Publications (2)
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