CN210090124U - Oil smoke on-line monitoring system - Google Patents
Oil smoke on-line monitoring system Download PDFInfo
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- CN210090124U CN210090124U CN201920303995.7U CN201920303995U CN210090124U CN 210090124 U CN210090124 U CN 210090124U CN 201920303995 U CN201920303995 U CN 201920303995U CN 210090124 U CN210090124 U CN 210090124U
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Abstract
The utility model discloses an oil smoke on-line monitoring system mainly includes zero gas generator, air pump, efflux negative pressure sampling device, air current adjusting device, sampling rifle, zero gas generator, detection room, flue gas sensor. The device is fixed on an equipment shell, the equipment shell is connected with the mounting base in an easy-to-mount and easy-to-dismount mode, the mounting base is permanently connected with the outer side of the measured pipeline in a rivet pulling mode, and a sealing gasket is embedded in the mounting base and airtight. The oil smoke on-line monitoring system is provided with a zero gas generator, the zero gas generator adopts a filtering material and can be used for removing pollutants in air, the air after the pollutants are removed is used as zero gas of the system, and the zero gas is a jet medium for extracting sample gas and is a clean air source for diluting the sample gas in proportion. Different from conventional air sampling system, the utility model discloses a negative pressure extraction that the appearance gas produced through the zero gas efflux, the appearance gas does not pass through the air pump, so the utility model discloses do not have the ascending sampling pump of conventional meaning.
Description
Technical Field
The utility model relates to an oil smoke detects technical field, specifically is an oil smoke on-line monitoring system.
Background
With the continuous development and progress of society, people pay more attention to environmental protection, and monitor the environment in production and life through various equipment and means, and the monitoring of catering and industrial oil smoke is one of the important branches.
The oil smoke pollutants mainly comprise two types of pollutants, namely fine particulate matters and Volatile Organic Compounds (VOCs), the particulate matter measurement is usually carried out by adopting a light scattering sensor, and the Volatile Organic Compounds (VOCs) are usually measured by adopting a semiconductor or an electrochemical sensor. The initial concentration of oil smoke pollutant usually surpasses the best response interval of sensor, high concentration particulate matter easily attaches to sensitization components and parts surface, forms shielding effect, makes light scattering particulate matter sensor lose efficacy, damage fast, and sample gas particulate matter concentration is when high simultaneously, can produce "self absorption" effect, and the light that particulate matter scatters out is absorbed by self, and the sensor work is in nonlinear area this moment, and the true concentration condition of sample gas can not accurately be reflected to the light signal that photosensitive element received. Conventional gas sampling measurement, sample gas can pass through the air pump, and the pollutant in the sample gas can cause the damage to the air pump, adopts simple filtration mode can cause the instability of system air-resistor.
For the measurement object of the oil smoke containing high adhesive pollutant, a sampling and measuring device capable of overcoming the above adverse effect is required.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide an oil smoke on-line monitoring system to the data that the oil smoke class high adhesion pollutant detected object that proposes leads to is inaccurate, the sensor easily became invalid, air pump fragile scheduling problem in solving above-mentioned background art.
In order to achieve the above object, the utility model provides a following technical scheme:
an oil smoke on-line monitoring system comprises a zero gas generator, an air pump, a jet negative pressure sampling device, a sample gas flow regulating device, a sampling gun and a smoke sensor; an air pump is arranged on one side of the zero gas generator, a jet negative pressure sampling device is arranged on one side of the air pump, a sample gas flow regulating device is mounted at the upper end of the jet negative pressure sampling device, a sampling gun is embedded above the sample gas flow regulating device, a flue gas sensor is connected to one side of the jet negative pressure sampling device, and a pipeline is externally connected to one side of the sampling gun; the sampling gun is straight, and the sampling channel is a tubular object.
Preferably: the oil smoke on-line monitoring system further comprises a particulate cutter, and two ends of the particulate cutter are respectively connected with the sample gas flow regulating device and the sampling gun.
Preferably: the particle cutting point of the particle cutter is between 0.5 and 10 μm.
Preferably: the oil smoke on-line monitoring system further comprises a detection chamber, one end of the detection chamber is connected with the jet negative pressure sampling device, the other end of the detection chamber is communicated with the atmosphere, and a smoke sensor and a heating device are arranged in the detection chamber.
Preferably: the detection chamber is arranged in the shell, an air inlet is fixed at one end of the shell, and an air outlet is formed in the surface of the shell.
Preferably: the sampling gun comprises a nozzle, a tube body and a tube base; the pipe nozzle is formed in one side of the pipe body, and a pipe base is fixedly connected to one side, far away from the pipe nozzle, of the pipe body.
Preferably: the zero gas generator is connected with the air pump through a connecting pipe, and the air pump is connected with the jet negative pressure sampling device through a connecting pipe.
Preferably: the pipeline is characterized in that a mounting base is arranged on one side of the pipeline, a first folded plate is stamped on one side of the mounting base, a second folded plate is stamped on the other side of the mounting base, a first protruding edge is stamped on the top side of the first folded plate, a second protruding edge is stamped on the top side of the second folded plate, first strip-shaped gourd holes are penetrated through the two sides of the top of the first protruding edge, second strip-shaped gourd holes are penetrated through the two sides of the top of the second protruding edge, the top of the mounting base is fixed to the bottom of the monitoring system shell through fixing step rivet columns in a pressing and riveting mode, the bottom of the mounting base is fixed to the outer side of the pipeline through screws, a sampling gun penetrates through the pipeline, and a sealing gasket is sleeved on the outer side of the sampling gun.
Preferably: the sampling gun is connected with the sealing gasket in a clamping manner, and the sealing gasket is fixedly connected with the mounting base.
Preferably: the screw holes are formed in the two sides of the mounting base in a penetrating mode and are distributed at the edges of the four corners of the mounting base respectively.
Compared with the prior art, the beneficial effects of the utility model are that: the oil smoke online monitoring system can simultaneously measure the real-time concentration values of two pollutants, namely particulate matters and Volatile Organic Compounds (VOCs) in oil smoke; the utility model makes the sensor always work in the optimal response zone through reasonable design, thereby improving the accuracy of data; the maintenance period and the service life of the sampling device and the measuring device are greatly prolonged; the quick assembly and disassembly of the on-line monitoring system is realized through the mounting base permanently fixed on the air pipe.
Drawings
FIG. 1 is a schematic structural diagram of embodiment 1 of the system of the present invention
Fig. 2 is a schematic structural diagram of embodiment 2 of the system of the present invention;
FIG. 3 is the schematic structural diagram of the sampling gun of the present invention
FIG. 4 is a schematic view of the casing structure of the detection chamber of the present invention;
fig. 5 is a schematic top view of the casing of the present invention;
FIG. 6 is a schematic view of the system installation structure of the present invention;
fig. 7 is a schematic view of the front view structure of the mounting base of the present invention;
fig. 8 is a schematic top view of the mounting base according to the present invention.
In the figure: 1. a zero gas generator; 2. an air pump; 3. a jet negative pressure sampling device; 4. a sample gas flow rate adjusting device; 5. a particulate cutter; 6. a sampling gun; 61. a nozzle; 62. a pipe body; 63. a pipe base; 7. a detection chamber; 71. a heating device; 8. a flue gas sensor; 9. a housing; 10. an air inlet; 11. an exhaust port; 12. a pipeline; 13. mounting a base; 14. a screw; 15. a monitoring system housing; 16. a gasket; 17. fixing the step riveting column; 131. a first folded plate; 132. a second folded plate; 133. a second raised edge; 134. a first raised edge; 1301. a screw hole; 1302. a sampling gun through hole; 1331. a second bar-shaped gourd hole; 1341. the first bar-shaped gourd hole.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. It is to be noted that, in the description of the present invention, "a plurality" means two or more unless otherwise specified; the terms "upper", "lower", "left", "right", "inner", "outer", "front", "rear", "head", "tail", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
Furthermore, the terms "first," "second," "third," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
Meanwhile, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "connected" and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; the connection can be mechanical connection or electrical connection; may be directly connected or indirectly connected through an intermediate. For those skilled in the art, the specific meaning of the above terms in the present invention can be understood in specific situations, and all other embodiments obtained by those skilled in the art without creative efforts belong to the protection scope of the present invention based on the embodiments in the present invention.
In the first embodiment, please refer to fig. 1, 3, 6, 7, and 8, the present invention provides a technical solution:
an oil smoke on-line monitoring system: the oil smoke on-line monitoring system comprises a zero gas generator 1, an air pump 2, a jet negative pressure sampling device 3, a sample gas flow regulating device 4, a sampling gun 6 and a smoke sensor 8; an air pump 2 is arranged on one side of the zero gas generator 1, a jet flow negative pressure sampling device 3 is arranged on one side of the air pump 2, a sample air flow regulating device 4 is mounted at the upper end of the jet flow negative pressure sampling device 3, a sampling gun 6 is embedded above the sample air flow regulating device 4, a flue gas sensor 8 is connected to one side of the jet flow negative pressure sampling device 3, and a pipeline 12 is externally connected to one side of the sampling gun 6; the sampling gun 6 is straight, and the sampling channel is a tubular object.
The sampling gun 6 is transversely arranged in the flue, the plane of the nozzle is parallel to the direction of the airflow in the flue, the mounting state of the nozzle is vertical to that of a conventional sampling (collecting) gun (device), and the state of the nozzle (collecting port) facing the direction of the airflow is completely different. The sample gas of the device of the embodiment is sucked into the sampling gun from the flue through the negative pressure generated in the jet negative pressure sampling device, once the sample gas is sucked into the sampling gun from the flue, the airflow in the sampling gun 6 enters the detection equipment in a constant speed state under the action of the negative pressure.
The zero gas generator 1 is connected with the air pump 2 through a connecting pipe, and the air pump 2 is connected with the jet negative pressure sampling device 3 through a connecting pipe. The zero gas generator 1 adopts a filtering material, can be used for removing pollutants in air, the air after the pollutants are removed is used as zero gas of the system, the zero gas is a jet flow medium extracted by sample gas, and simultaneously is a clean air source for diluting the sample gas in proportion.
Specifically, the sampling gun 6 comprises a nozzle 61, a tube body 62 and a tube base 63; the nozzle 61 is arranged on one side of the pipe body 62, and a pipe base 63 is fixedly connected to one side of the pipe body 62 far away from the nozzle 61.
The oil fume pollutants mainly comprise four types, namely sub-millimeter particles (the peak value of a number particle size spectrum is in the order of 100 mu m) generated by mechanical dispersion (high-temperature oil-water mixed micro explosion), sub-micron particles (the peak value of the number particle size spectrum is in the order of 10 nm) generated by oil volatilization condensation and incomplete combustion product condensation, volatile organic matters, inorganic matters generated by combustion and the like. Wherein the submicron particles generated by agglomeration belong to the category of atmospheric fine particles, which are typical of PM2.5The pollutants are the reasons for generating oil smoke plume, secondary volatile products of the pollutants are one of main sources of oil smoke odor, so the pollutants are the main objects of oil smoke pollution detection and are the most important indicators of oil smoke pollution degree, and oil smoke field detection and oil smoke online monitoring are mainly used for detecting the concentrations of oil smoke fine particles and Volatile Organic Compounds (VOCs). As described above, the constant-speed sampling method is still adopted in the present stage of sampling the oil smoke fine particles, and the samples of the oil smoke fine particles cannot be directly obtained on site in real time. The utility model discloses a research that main research personnel engaged in the oil smoke pollutant for a long time is the first one of the authors that involves the whole particle size spectrum of food and beverage oil smoke (nanometer to millimeter) analysis paper of the whole world, through comprehensive analysis and ingenious application to food and beverage oil smoke particle size distribution characteristic, makes the utility model discloses a research and development personnel do. The principle is as follows: the catering oil smoke particles come from two completely different generation ways, so that the oil smoke particles are intensively distributed near two median particle diameters, the particle diameter of condensed particles is basically concentrated at about 10nm, and the oil smoke particles generated by mechanical dispersion are basically concentrated atAbout 100 μm, with a substantial gap between them. When the aerodynamic particle size is less than 1 mu m, the action of particulate matter tends to the air gaseous state material characteristic, and when the aerodynamic particle size is less than below 0.5 mu m, generally no longer adopt the aerodynamic particle size notion, adopt stokes particle size notion usually, to the oil smoke fine particles of particle size at 10nm order of magnitude, need not to dispose the required thin wall constant velocity sampling nozzle towards the air current direction of constant velocity sampling and also can realize accurate sampling, based on aforementioned reason, adopt the utility model discloses oil smoke on-line measuring system can omit the particulate matter cutterbar that adopts among the prior art. The sample gas gets into until getting into the sampling rifle from the sample connection, and this section distance is because the existence of body, and the large granule thing in the sample gas can subside in the pipe wall naturally because of the action of gravity, and remaining pollutant that can not subside is the object that detection device will detect promptly to sampling rifle 6 has played the effect of cutterbar, adopts straight type sampling rifle to realize the accurate cutting sampling of oil smoke fine particles thing equally.
Specifically, the length of body is L, and the sampling channel diameter of body is d, wherein:
in the formula: l- -sampling gun length (m), Q- -sample gas flow (m)3H), d- - -the inner diameter (m) of the sampling gun, pi- - -the circumference ratio.
Specifically, the diameter of a part of the sampling channel in the nozzle is less than or equal to the diameter of the sampling channel of the tube body.
Specifically, the diameter of the sampling channel of the nozzle close to the pipe body is smaller than or equal to the diameter of the sampling channel of the pipe body.
Specifically, a mounting base 13 is arranged on one side of the pipeline, a first folding plate 131 is stamped on one side of the mounting base 13, a second folding plate 132 is stamped on the other side of the mounting base 13, a first protruding edge 134 is stamped on one side of the top of the first folding plate 131, a second protruding edge 133 is stamped on one side of the top of the second folding plate 132, first strip-shaped gourd holes 1341 are respectively penetrated through two sides of the top of the first protruding edge 134, second strip-shaped gourd holes 1331 are respectively penetrated through two sides of the top of the second protruding edge 133, the top of the mounting base 13 is fixed to the bottom of the monitoring system shell 15 through fixing step riveting columns 17 in a pressing and riveting mode, the bottom of the mounting base 13 is fixed to the outer side of the pipeline 12 through screws 14, the pipeline 12 is penetrated through a sampling gun 6, and a sealing gasket 16 is sleeved on the outer side of the sampling gun 6.
Specifically, the sampling gun 6 is connected with the sealing gasket 16 in a clamping manner, and the sealing gasket 16 is fixedly connected with the mounting base (13).
Specifically, screw holes 1301 penetrate through two sides of the mounting base 13, and the screw holes 1301 are respectively distributed at four corner edges of the mounting base 13.
During installation, the fixed step riveting column 17 is respectively aligned with the first strip-shaped gourd hole 1341 and the second strip-shaped gourd hole 1331, and the equipment is slightly pushed downwards in the large radial direction and clamped and fixed. When the sampling gun is disassembled, the device is taken down by upwards slightly pushing the large diameter aligning to the first bar-shaped gourd hole 1341 and the second bar-shaped gourd hole 1331, a sampling gun through hole 1302 is formed in the mounting base 13 and is aligned with an opening in the sampling gun 6, a margin space is left for the sampling gun 6, and the sampling gun does not interfere with the sampling gun 6 when the sampling gun is disassembled and slides; the mounting base 13 is air-tight to the equipment by a gasket 16.
Specifically, the smoke sensor comprises a detection result uploading system, and can process and upload detection data in real time.
In the second embodiment, please refer to fig. 2, 3, 6, 7, and 8, the difference between the first embodiment and the second embodiment is that the online lampblack monitoring system further includes a particulate cutter 5, and the two ends are respectively connected to the sample gas flow rate adjusting device 4 and the sampling gun 6. The oil smoke on-line monitoring system further comprises a detection chamber 7, one end of the detection chamber 7 is connected with the jet negative pressure sampling device 3, the other end of the detection chamber is communicated with the atmosphere, and a smoke sensor 8 is arranged in the detection chamber 7. The detection chamber 7 has the functions of further diffusing and homogenizing the diluted sample gas, buffering the pulsation of the gas flow and balancing the gas pressure.
In particular, the particle cutting point of the particle cutter 5 is between 10nm and 100 μm. Most preferably, between 0.5 μm and 10 μm. Due to the characteristics of oil fume pollutants, if two kinds of oil fume particles need to be cut, the cutting point is selected to be any point between 10nm and 100 mu m, and the cutting effect is basically not different, so that the limitation on the constant speed characteristic of an air pump matched with the cutter is greatly widened, namely within an extremely wide range of air extraction speed, the cutter can acquire real oil fume fine particle samples.
In a third embodiment, please refer to fig. 4 and 5, the oil smoke online monitoring system further includes a detection chamber 7, one end of the detection chamber 7 is connected to the jet negative pressure sampling device, the other end is communicated with the atmosphere, and a smoke sensor 8 and a heating device 71 are disposed in the detection chamber. The detection chamber 7 is arranged in a shell 9, an air inlet 10 is fixed at one end of the shell 9, and an air outlet 11 is arranged on the surface of the shell. The air flow pulse can be reduced, the air flow can be buffered, the atmospheric pressure inside the box body and outside the box body can be balanced, and the detection precision can be improved.
The working principle is as follows: for the oil smoke online monitoring system, firstly, related monitoring components are assembled inside a monitoring system shell 15, a mounting base 13 is fixed on a pipeline 12 through a screw 14, then a sampling gun 6 is placed in the mounting base 13, the sampling gun 6 penetrates into the pipeline 12 from a sealing gasket 16 in the mounting base 13, the sampling gun 6 is positioned in the mounting base 13, and a step riveting column is fixed to fix the mounting base 13 and the monitoring system shell 15; starting the air pump 2, increasing the air flow force in the system by the air pump 2 to make the air enter the zero gas generator 1, wherein the zero gas generator 1 adopts a filter membrane or filter cotton and can be used for removing particulate matters in the air, the air with the particulate matters removed is used as the zero gas of the system, the zero gas enters the jet negative pressure sampling device 3, the sampling gun 6 is contacted with the oil smoke, the flow cross section is reduced at the contraction section of the jet negative pressure sampling device 3, according to the Venturi effect, the gas is ejected out through the jet orifice at high speed, low pressure is generated near the fluid flowing at high speed, namely, strong negative pressure is generated in a cavity near the jet orifice in the figure, the oil smoke is acted by the negative pressure in the system, enters the sampling gun 6 along the sampling gun 6 and then enters the particulate matters cutter 5, and the particulate matters cutter 5 controllably selects the particle sizes of the particulate matters in the sample gas according to requirements, and then the oil smoke enters a sample gas flow regulating device 4, the sample gas flow regulating device 4 accurately controls the dilution ratio within a certain range by a method of regulating the sample gas flow, the oil smoke is uniformly mixed and then enters a detection chamber 7, the flow cross section area in the detection chamber 7 is increased, the gas flow speed is reduced, meanwhile, a pressure relief opening communicated with the atmosphere is arranged in the detection chamber 7, the pressure relief opening can eliminate the pressure fluctuation caused by the gas operation of the gas pump 2 to the gas, so that the pressure relief opening is always kept close to the atmospheric pressure, the arrangement is favorable for the stable operation of a sensor gas inlet, the sensor always works in the ideal working environment of the sensor, the redundant gas is discharged through the pressure relief opening and then enters a smoke sensor 8, and various particulate matters and gas analysis sensors in the smoke sensor 8 detect and analyze the oil smoke.
The system can also be additionally provided with an information transmission system, an alarm system and the like, the analysis result can transmit the detected information to the alarm system through the information transmission system, if the detected information exceeds the standard, the alarm system can give an alarm, and the using process of the whole oil smoke online monitoring system is completed.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. An oil smoke on-line monitoring system which characterized in that: the oil smoke online monitoring system comprises a zero gas generator (1), an air pump (2), a jet negative pressure sampling device (3), a sample gas flow regulating device (4), a sampling gun (6) and a smoke sensor (8); an air pump (2) is arranged on one side of the zero gas generator (1), a jet flow negative pressure sampling device (3) is arranged on one side of the air pump (2), a sample gas flow adjusting device (4) is installed at the upper end of the jet flow negative pressure sampling device (3), a sampling gun (6) is embedded above the sample gas flow adjusting device (4), a flue gas sensor (8) is connected to one side of the jet flow negative pressure sampling device (3), and a pipeline (12) is externally connected to one side of the sampling gun (6); the sampling gun (6) is straight, and the sampling channel is a tubular object.
2. The oil smoke on-line monitoring system of claim 1, characterized in that: the oil smoke on-line monitoring system further comprises a particulate cutter (5), and two ends of the particulate cutter (5) are respectively connected with the sample gas flow regulating device (4) and the sampling gun (6).
3. The oil smoke on-line monitoring system of claim 2, characterized in that: the particle cutting point of the particle cutter (5) is between 0.5 and 10 mu m.
4. The oil smoke on-line monitoring system of claim 1, characterized in that: the oil smoke on-line monitoring system further comprises a detection chamber (7), one end of the detection chamber (7) is connected with the jet negative pressure sampling device, the other end of the detection chamber is communicated with the atmosphere, and a smoke sensor (8) and a heating device (71) are arranged in the detection chamber.
5. The oil smoke on-line monitoring system of claim 4, characterized in that: the detection chamber (7) is arranged in the shell (9), one end of the shell (9) is fixed with an air inlet (10), and the surface of the shell is provided with an air outlet (11).
6. The oil smoke on-line monitoring system of claim 1, characterized in that: the sampling gun (6) comprises a nozzle (61), a tube body (62) and a tube base (63); the pipe nozzle (61) is formed in one side of the pipe body (62), and a pipe base (63) is fixedly connected to one side, far away from the pipe nozzle (61), of the pipe body (62).
7. The oil smoke on-line monitoring system of claim 1, characterized in that: the zero gas generator (1) is connected with the air pump (2) through a connecting pipe, and the air pump (2) is connected with the jet negative pressure sampling device (3) through a connecting pipe.
8. An online lampblack monitoring system according to any one of claims 1-7, characterized in that: a mounting base (13) is arranged on one side of the pipeline (12), a first folded plate (131) is stamped on one side of the mounting base (13), a second folded plate (132) is stamped on the other side of the mounting base (13), a first raised edge (134) is stamped on one side of the top of the first folded plate (131), a second raised edge (133) is stamped on one side of the top of the second folded plate (132), first strip-shaped gourd holes (1341) penetrate through two sides of the top of the first raised edge (134), second strip-shaped gourd holes (1331) penetrate through two sides of the top of the second raised edge (133), the top of the mounting base (13) is fixed on the bottom of the monitoring system shell (15) through a fixed step riveting column (17), the bottom of the mounting base (13) is fixed on the outer side of the pipeline (12) through a screw (14), and a sampling gun (6) penetrates through the pipeline (12), and a sealing gasket (16) is sleeved on the outer side of the sampling gun (6).
9. The oil smoke on-line monitoring system of claim 8, characterized in that: sampling gun (6) and sealed the pad (16) between be the block connection, and sealed pad (16) and mounting base (13) between be fixed connection.
10. The oil smoke on-line monitoring system of claim 8, characterized in that: screw holes (1301) are formed in the two sides of the mounting base (13) in a penetrating mode, and the screw holes (1301) are distributed at the edges of the four corners of the mounting base (13) respectively.
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| CN109870330A (en) * | 2019-03-11 | 2019-06-11 | 成都智胜欣业环保科技有限公司 | A kind of oil smoke on-line monitoring system |
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| CN109870330A (en) * | 2019-03-11 | 2019-06-11 | 成都智胜欣业环保科技有限公司 | A kind of oil smoke on-line monitoring system |
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