CN210604550U - Flue gas nitrogen oxide detection device and flue gas monitoring system - Google Patents
Flue gas nitrogen oxide detection device and flue gas monitoring system Download PDFInfo
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- CN210604550U CN210604550U CN201921205275.3U CN201921205275U CN210604550U CN 210604550 U CN210604550 U CN 210604550U CN 201921205275 U CN201921205275 U CN 201921205275U CN 210604550 U CN210604550 U CN 210604550U
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Abstract
The utility model relates to a flue gas detection device field, in particular to flue gas nitrogen oxide detection device and flue gas monitoring system, flue gas nitrogen oxide detection device includes the sample intake pipe, set up flue gas nitrogen oxide sensor in the sample intake pipe, and set up air amplifier suction flue gas in detection section low reaches and detect, because flue gas nitrogen oxide sensor sets up in the sample intake pipe on stretching out the part of flue, and set up the upper reaches at air amplifier, reduce calorific loss, can directly detect the flue gas, need not carry out the secondary heating to the flue gas, flue gas nitrogen oxide detection device's structure has been simplified, the complicated detection cost height problem that causes of present detection device structure has been solved.
Description
Technical Field
The utility model relates to a flue gas detection device field, in particular to flue gas nitrogen oxide detection device and flue gas monitoring system.
Background
In the power industry, coal-fired power generation can generate and discharge a large amount of flue gas, wherein CO and SO in the flue gas2、SO3And NOXAnd the like are extremely harmful to the ecological environment and human bodies. In the process of boiler operation, in order to know the degree of incomplete combustion in the stove, conveniently adjust the combustion condition, need monitor various compositions in the flue gas.
The utility model discloses a chinese utility model patent that the bulletin number of authorizing is CN204389392U, the date of authorizing is 2015.06.10 discloses a gas detection device, including sampling device and detection device, sampling device installs on the flue, be used for the gas sampling to in the flue, detection device includes detecting element, analysis unit and additional structure, the additional structure passes through connecting piece and sampling device and analysis unit intercommunication, the sample gas gets into the additional structure through sampling device's filtration back and detects, because flue gas nitrogen oxide detects to require higher to the temperature, additional structure and connecting piece all have the function of heating, improve and detect the precision. Although the gas detection device can detect nitrogen oxides, the detection device needs to take out flue gas and heat the flue gas for detection, the structure of the detection device is complex, and the detection cost of the detection device is high.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a flue gas nitrogen oxide detection device to solve the complicated problem with high costs that causes of present detection device structure, in addition, the utility model discloses an aim at still provides a flue gas monitoring system that detection cost is lower relatively.
In order to achieve the above object, the utility model discloses flue gas nitrogen oxide detection device's technical scheme is:
flue gas nitrogen oxide detection device includes:
the sampling air inlet pipe is used for extending into the flue, the part of the sampling air inlet pipe extending out of the flue comprises a detection section with a detection cavity, the downstream of the detection section is sequentially connected with an air amplifier and an air return pipe communicated with the interior of the flue in series,
the air suction port of the air amplifier is communicated with the outlet of the detection section, the air exhaust port of the air amplifier is communicated with the air return pipe, the air amplifier is also provided with a power gas inlet which is communicated with a power gas source,
and the smoke nitrogen oxide sensor is fixed on the detection section.
The utility model discloses a flue gas nitrogen oxide detection device's beneficial effect: flue gas nitrogen oxide detection device is including the sample intake pipe, set up flue gas nitrogen oxide sensor in the sample intake pipe, and set up air amplifier suction flue gas in detection section low reaches and detect, because flue gas nitrogen oxide sensor sets up in the sample intake pipe stretches out on the part of flue, and set up the upper reaches at air amplifier, reduce calorific loss, can directly detect the flue gas, need not carry out the secondary heating to the flue gas, flue gas nitrogen oxide detection device's structure has been simplified, the complicated detection cost height problem that causes of present detection device structure has been solved.
Further, for the installation of convenient flue gas nitrogen oxide sensor, the sample intake pipe includes the body of admitting air and the removable detection joint of fixing in body of admitting air gas outlet department that detects and connects the formation the detection section, flue gas nitrogen oxide sensor and air amplifier all connect on detecting the joint. The processing of joint structure and the installation of flue gas nitrogen oxide sensor are conveniently detected.
For further convenient assembly, flue gas nitrogen oxide detection device is still including passing flue heat preservation, both ends confined heat preservation protecting pipe, and the dress is worn at the heat preservation protecting pipe to sample intake pipe and muffler, the muffler is including being in the intraductal return air body of heat preservation protecting pipe and being in the removable fixed connector of return air body upper reaches and return air body, the connector with detection joint all sets up outside the heat preservation protecting pipe. During installation, the heat-insulating protective sleeve, the sampling air inlet pipe and the air return pipe are inserted into the flue, and the connector can be detached to provide a large installation space for the flue gas nitrogen oxide sensor.
Furthermore, the detection joint is in threaded connection with the air inlet pipe body, the connector is located on one side, perpendicular to the extending direction of the heat-preservation protective sleeve, of the detection joint, the structure is compact, and meanwhile the connection efficiency of the detection joint and the air inlet pipe body is high.
Furthermore, in order to improve the detection precision, a heat preservation cover is arranged outside the detection section. Further reduce calorific loss, improve and detect the precision.
In order to further reduce the temperature reduction range, the smoke nitrogen oxide detection device further comprises a heat-insulation protective sleeve penetrating through a flue heat-insulation layer and being closed at two ends, a sampling air inlet pipe and a return air pipe are arranged in the heat-insulation protective sleeve in a penetrating mode, and the detection section is located on the portion, penetrating out of the heat-insulation protective sleeve, of the sampling air inlet pipe. The heat-insulating protective sleeve can reduce heat loss and reduce the temperature reduction range as much as possible.
Further, flue gas nitrogen oxide detection device still includes the install bin, is equipped with the pipeline mouth on the install bin, the installation bin tank wall of heat preservation protecting pipe and pipeline mouth department is fixed, and the opening part of heat preservation protecting pipe orientation install bin tank wall is equipped with the heat insulating board of shutoff heat preservation protecting pipe opening, sample intake pipe and muffler pass the heat insulating board and stretch into in the install bin. Can be with other part integrations in the install bin, make things convenient for the integral erection, the heat insulating board avoids the install bin inner part to damage.
Furthermore, the part of the heat-insulating protective sleeve, which extends out of the heat-insulating layer of the flue and is close to the connecting section, is filled with heat-insulating materials. Further reducing the heat loss in the heat-insulating protective sleeve.
Further, flue gas nitrogen oxide sensor sets up the detection section upside, avoids the sensor to intake and influences the detection precision.
In order to achieve the above object, the utility model discloses flue gas monitoring system's technical scheme does: including flue gas nitrogen oxide detection device and the power air supply who provides power, flue gas nitrogen oxide detection device includes:
the sampling air inlet pipe is used for extending into the flue, the part of the sampling air inlet pipe extending out of the flue comprises a detection section with a detection cavity, the downstream of the detection section is sequentially connected with an air amplifier and an air return pipe communicated with the interior of the flue in series,
the air suction port of the air amplifier is communicated with the outlet of the detection section, the air exhaust port of the air amplifier is communicated with the air return pipe, the air amplifier is also provided with a power gas inlet which is communicated with a power gas source,
and the smoke nitrogen oxide sensor is fixed on the detection section.
The utility model discloses a flue gas monitoring system's beneficial effect: flue gas nitrogen oxide detection device is including the sample intake pipe, set up flue gas nitrogen oxide sensor in the sample intake pipe, and set up air amplifier suction flue gas in detection section low reaches and detect, because flue gas nitrogen oxide sensor sets up in the sample intake pipe stretches out on the part of flue, and set up the upper reaches at air amplifier, reduce calorific loss, can directly detect the flue gas, need not carry out the secondary heating to the flue gas, flue gas nitrogen oxide detection device's structure has been simplified, the complicated detection cost height problem that causes of present detection device structure has been solved.
Further, for the installation of convenient flue gas nitrogen oxide sensor, the sample intake pipe includes the body of admitting air and the removable detection joint of fixing in body of admitting air gas outlet department that detects and connects the formation the detection section, flue gas nitrogen oxide sensor and air amplifier all connect on detecting the joint. The processing of joint structure and the installation of flue gas nitrogen oxide sensor are conveniently detected.
For further convenient assembly, flue gas nitrogen oxide detection device is still including passing flue heat preservation, both ends confined heat preservation protecting pipe, and the dress is worn at the heat preservation protecting pipe to sample intake pipe and muffler, the muffler is including being in the intraductal return air body of heat preservation protecting pipe and being in the removable fixed connector of return air body upper reaches and return air body, the connector with detection joint all sets up outside the heat preservation protecting pipe. During installation, the heat-insulating protective sleeve, the sampling air inlet pipe and the air return pipe are inserted into the flue, and the connector can be detached to provide a large installation space for the flue gas nitrogen oxide sensor.
Furthermore, the detection joint is in threaded connection with the air inlet pipe body, the connector is located on one side, perpendicular to the extending direction of the heat-preservation protective sleeve, of the detection joint, the structure is compact, and meanwhile the connection efficiency of the detection joint and the air inlet pipe body is high.
Furthermore, in order to improve the detection precision, a heat preservation cover is arranged outside the detection section. Further reduce calorific loss, improve and detect the precision.
In order to further reduce the temperature reduction range, the smoke nitrogen oxide detection device further comprises a heat-insulation protective sleeve penetrating through a flue heat-insulation layer and being closed at two ends, a sampling air inlet pipe and a return air pipe are arranged in the heat-insulation protective sleeve in a penetrating mode, and the detection section is located on the portion, penetrating out of the heat-insulation protective sleeve, of the sampling air inlet pipe. The heat-insulating protective sleeve can reduce heat loss and reduce the temperature reduction range as much as possible.
Further, flue gas nitrogen oxide detection device still includes the install bin, is equipped with the pipeline mouth on the install bin, the installation bin tank wall of heat preservation protecting pipe and pipeline mouth department is fixed, and the opening part of heat preservation protecting pipe orientation install bin tank wall is equipped with the heat insulating board of shutoff heat preservation protecting pipe opening, sample intake pipe and muffler pass the heat insulating board and stretch into in the install bin. Can be with other part integrations in the install bin, make things convenient for the integral erection, the heat insulating board avoids the install bin inner part to damage.
Furthermore, the part of the heat-insulating protective sleeve, which extends out of the heat-insulating layer of the flue and is close to the connecting section, is filled with heat-insulating materials. Further reducing the heat loss in the heat-insulating protective sleeve.
Further, flue gas nitrogen oxide sensor sets up the detection section upside, avoids the sensor to intake and influences the detection precision.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the device for detecting nitrogen oxides in flue gas according to the present invention (some pipelines are not shown);
FIG. 2 is a schematic view of a partial structure of an embodiment of the device for detecting nitrogen oxides in flue gas of the present invention;
FIG. 3 is a schematic view of the installation state of the embodiment of the device for detecting nitrogen oxide in flue gas of the present invention;
FIG. 4 is a schematic view of a partial structure of a thermal insulation sheath, a sampling intake pipe and a return pipe (arrows indicate the flow direction of flue gas) according to an embodiment of the device for detecting nitrogen oxide in flue gas of the present invention;
FIG. 5 is a schematic structural view of the thermal insulation sheath, the sampling intake pipe and the return pipe according to the embodiment of the device for detecting nitrogen oxide in flue gas of the present invention;
FIG. 6 is a schematic structural view of the thermal insulation sheath and the installation box of the flue gas nitrogen oxide detection device according to the embodiment of the present invention;
in the figure: 1. sampling an air inlet pipe; 11. an air intake pipe body; 12. detecting the joint; 121. a detection chamber; 122. a gas external interface; 13. a sampling tube body; 2. an air return pipe; 21. a gas return pipe body; 22. a connector; 23. an adapter; 3. a nitrogen oxide detection sensor; 4. an air amplifier; 41. an air suction port; 42. a motive gas inlet; 5. a heat-insulating protective sleeve; 51. a sheath pipe fixing flange; 52. a connecting flange; 6. a transfer seat; 61. an air return port; 7. a protective cover; 81. a flue wall; 82. a flue heat-insulating layer; 83. fixing a sleeve; 831. fixing a sleeve flange; 9. installing a box; 10. a heat insulation plate; 101. hanging a plate; 102. an accumulator; 103. a flow meter; 104. a reduced pressure filtration assembly; 1041. a reduced-pressure filtration assembly air inlet; 105. a three-way valve; 1051. calibrating an air source interface; 106. a first solenoid valve; 107. a second solenoid valve; 108. an ultra-high temperature filter; 109. a thermal insulation filling material; 110. a heat insulating pad.
Detailed Description
The following describes embodiments of the present invention with reference to the accompanying drawings.
The utility model discloses flue gas nitrogen oxide detection device embodiment, as shown in fig. 1 and fig. 4, flue gas nitrogen oxide detection device is including being used for stretching into sample intake pipe 1 and muffler 2 in the flue, and sample intake pipe 1 includes air intake body 11 and the removable detection joint 12 of fixing in air intake body 11 exit, and air intake body 11 export is in the one end that air intake body 11 stretches out the flue. As shown in fig. 2, in this embodiment, the detection joint 12 is screwed with the air inlet pipe body 11, so that the structure is simple and the installation is convenient. The detection connects 12 to be massive structure, has detection chamber 121 in the detection connects 12, is equipped with the nitrogen oxide that is arranged in detecting the flue gas in detection chamber 121 on the detection connects 12 and detects sensor 3, and nitrogen oxide detects sensor 3 and sets up the upside at detection connects 12, avoids the water logging in the sample intake pipe to soak nitrogen oxide and detects sensor 3. The detection joint 12 is further provided with a gas external interface 122 facing the nitrogen oxide detection sensor 3, the gas external interface 122 is used for communicating with an external calibration gas source for collecting or back flushing gas sources, and the specific connection mode will be described in the following. In this embodiment, detection joint and the removable fixed of body of admitting air make things convenient for the dismouting maintenance. The detection joint forms a detection section of the sampling air inlet pipe, in other embodiments, the detection section can be a tubular structure integrally arranged with the air inlet pipe body, the nitrogen oxide detection sensor is fixed on the pipe wall, and the gas external interface is also arranged on the pipe wall. In other embodiments, the detection joint may be detachably connected to the intake pipe body through a flange, or may be connected in a non-detachable manner such as welding or riveting. In other embodiments, two external gas interfaces may be provided, one for back flushing and the other for calibration.
The downstream of the detection joint 12 is connected with an air amplifier 4, the air amplifier 4 is provided with an air suction port 41, an air exhaust port and a power gas inlet 42, the specific structure of the air amplifier 4 is the prior art, details are not expanded, the air suction port 41 of the air amplifier 4 is communicated with the detection joint 12, the air exhaust port is communicated with the air return pipe 2, the power gas inlet 42 is provided with compressed air by an air compressor, so that negative pressure is generated at the air suction port 41 of the air amplifier 4, smoke in a flue is sucked out, and the smoke is detected by the nitrogen oxide detection sensor 3 when the smoke is at a high temperature because the sucked smoke passes through the detection joint 12.
The air return pipe 2 comprises an air return pipe body 21 extending into the flue, a connector 22 which is positioned at the upstream of the air return pipe body 21 and detachably fixed with the air return pipe body 21, and an adapter 23 connected between the connector 22 and the air amplifier 4. The connector 22 is in threaded connection with the air return pipe body 21, two sockets which are in one-to-one correspondence with the air amplifier 4 and the connector 22 are arranged on the adapter 23, and the air amplifier interface and the interface on the connector are fixed through a set screw after being spliced. In this embodiment, the connector 22 is rectangular shape and is on a parallel with the screw thread section of being connected with the air intake body 11 on the detection joint 12, and the connector 22 is in one side that the detection joint 12 is perpendicular to the body extending direction of return air, because nitrogen oxide detection sensor 3 occupies great space, install in advance on the detection joint 12, need great operating space when the detection joint 12 is connected with the body 11 that admits air, therefore, when installation detection joint 12, can pull down the connector 22, install the detection joint 12 earlier, then install the connector 22, it is fixed to plug 23 and the interface on connector 22 and the air amplifier 4 to inserting at last, accomplish the installation. In other embodiments, when the detection head is welded or inserted and fixed with the air inlet pipe body without the rotation of the nitrogen oxide detection sensor, the connection head can be integrally arranged with the air return pipe body, and even if the rotation of the nitrogen oxide detection sensor is not required, the connection head can be arranged to facilitate the operations such as welding, insertion and the like; the connector can also be connected with the air amplifier through a bent pipe structure, or an elbow is arranged at one end of the air return pipe connected with the air amplifier and is directly connected with the air amplifier.
In this embodiment, in order to reduce thermal loss, flue gas nitrogen oxide detection device is still including passing flue heat preservation, both ends confined heat preservation protecting pipe 5, and sample intake pipe 1 and muffler 2 wear to adorn in heat preservation protecting pipe 5, reduce the calorific loss of sample intake pipe 1. As shown in fig. 4, the one end that heat preservation protecting pipe 5 stretched into in the flue is fixed with shutoff heat preservation protecting pipe one end open-ended adapter 6 through the flange, sample intake pipe 1 and muffler 2 all are fixed with adapter 6, adapter 6 shutoff heat preservation protecting pipe stretches into flue one end opening, adapter 6 both played the effect of fixed sample intake pipe 1 and muffler 2, also avoid the flue gas in the flue to pass through the outside leakage of heat preservation protecting pipe simultaneously. The adapter 6 is provided with a channel which is respectively communicated with the sampling air inlet pipe 1 and the air return pipe 2, the end part of the air return pipe 2 extending into the flue is fixed on the adapter 6 by screw threads, the air return pipe 2 is communicated with the flue through the channel on the adapter 6, and the adapter 6 is provided with an air return port 61 for the air in the air return pipe to enter the flue. End portion screw thread that the body of intake pipe 11 stretched into in the flue is fixed on adapter 6, sample intake pipe 1 still includes and the communicating sample body 13 of the body of intake pipe 11, sample body 13 and the body of intake pipe 11 pass through adapter 6 fixed connection, still be fixed with protection casing 7 on adapter 6, sample body 13 sets up in protection casing 7, the one end that adapter 6 was kept away from to sample body 13 still is connected with ultra high temperature filter 108, the one end that sample body 13 was kept away from to ultra high temperature filter 108 is fixed on protection casing 7, protection casing 7 has the mounting groove of flue gas flow direction in the opening towards the flue, ultra high temperature filter 108, sample body 13 all is in the mounting groove, prevent by the flue gas erosion. As shown in fig. 3, a flue heat-insulating layer 82 is disposed outside the flue wall 81, in this embodiment, a sampling mounting port is disposed on the flue wall 81, a fixing sleeve 83 penetrating through the flue heat-insulating layer 82 is fixed to the sampling mounting port, a fixing sleeve flange 831 is disposed at an end portion of the fixing sleeve 83 far away from the flue, a protecting sleeve fixing flange 51 fixed to the fixing sleeve flange 831 is disposed in the middle of the heat-insulating protecting sleeve 5, and the heat-insulating protecting sleeve 5 penetrates through the fixing sleeve 83. In other embodiments, under the condition of low requirement on detection precision, a heat-insulating protective sleeve can be omitted, and the sampling air inlet pipe and the air return pipe can be directly fixed in the fixed sleeve; of course, when there is no special requirement for the volume of the flue gas nitrogen oxide detection device, two openings may be provided on the flue gas pipeline, one of which is for the sampling intake pipe to pass through and the other is for the return pipe to pass through.
In this embodiment, flue gas nitrogen oxide detection device still includes install bin 9, install useful electrical part in the install bin 9, be equipped with the pipeline mouth on the install bin 9, the tip that heat preservation protecting pipe 5 stretches out the flue is equipped with the flange with install bin 9 fixed connection, flange fixes at the pipeline mouth, be equipped with shutoff heat preservation protecting pipe 5 open-ended heat insulating board 10 on the flange, heat insulating board 10 shutoff heat preservation protecting pipe 5 is towards the opening of install bin 9 tank wall promptly, prevent that the heat in the heat preservation protecting pipe 5 from getting into in the install bin 9, sample intake pipe and muffler 2 pass in heat insulating board 10 stretches into install bin 9, heat insulating board 10 plays the supporting role to sample intake pipe and muffler 2 simultaneously. In this embodiment, a heat-insulating cover (not shown in the figure) integrally covering the detection head and the connector is arranged in the installation box 9, the heat-insulating cover is of a sleeve-shaped structure with an opening at one end, which is made of a heat-insulating material, and the heat-insulating material can be heat-insulating cotton or the like.
In order to further avoid the heat loss of the insulating sheath, as shown in fig. 5 and 6, an insulating filling material 109, specifically, an existing insulating material such as insulating cotton, is provided in a portion of the insulating sheath 5 between the sheath fixing flange 51 and the connecting flange 52. Further, in order to improve the heat preservation effect, the radius of the portion between the protecting sleeve fixing flange 51 and the connecting flange 52 is larger than the radius of the portion penetrating through the heat preservation layer of the flue, so that more heat preservation materials can be filled in the portion between the protecting sleeve fixing flange 51 and the connecting flange 52. In order to prevent heat from being transmitted into the mounting box 9, a heat insulating mat 110 is provided between the connection flange 52 and the wall of the box body, and the heat insulating mat 110 is interposed between the wall and the connection flange 52.
As shown in fig. 1, the flue gas nitrogen oxide detection device further includes a hanging plate 101, the hanging plate 101 is provided with an energy accumulator 102, a flow meter 103 and a pressure reduction filter assembly 104, an outlet of the energy accumulator 102 is connected with a three-way valve 105, one interface of the three-way valve 105 is connected with the gas external interface 122 through a gas pipe, one is a calibration gas source interface 1051 for an external calibration gas source, when a calibration gas source needs to be introduced into the detection connector 12, the three-way valve 105 is adjusted to communicate the calibration gas source interface 1051 with the gas external interface 122, and a passage between the energy accumulator 102 and the gas external interface 122 is disconnected. In other embodiments, according to the actual requirements of users, the installation box can be omitted, and the electromagnetic valve is installed on the hanging plate or the specially-arranged installation frame. When need not set up the consumer in the install bin, the heat insulating board of heat preservation sheath pipe end portion can cancel, certainly, sets up the heat insulating board and can prevent to protect the intraductal heat loss of sheath, also can remain when not setting up the install bin. When two external air ports are arranged on the detection head, the three-way valve is not needed to be arranged, one of the two external air ports is connected with the energy accumulator, and the other external air port is connected with the calibration air source.
The air inlet 1041 of the pressure reducing filter assembly is connected with an air compressor, and the air outlet of the pressure reducing filter assembly 104 is connected with the accumulator 102 to charge the accumulator. The energy accumulator is provided with an air inlet and two air outlets, wherein the air inlet of the energy accumulator is connected with the air outlet of the pressure reduction filtering component 104, the two air outlets are respectively connected with an air outlet pipeline, one of the two air outlets is a power gas pipeline for supplying air to the air amplifier, the power gas pipeline is connected with the flow meter 103, and the power gas pipeline is connected with the power gas inlet 42 through the flow meter 103. The flowmeter 103 is arranged on the power gas pipeline, so that the flow of the gas can be adjusted according to the requirement, and the crystallization in the air amplifier 4 is avoided. And an air outlet pipeline is communicated with the air external interface 122 and used for back flushing cleaning, and the accumulator provides back flushing air to ensure that sufficient air is supplied at the moment of back flushing cleaning.
In this embodiment, a first electromagnetic valve 106 is disposed on an air pipe connecting the three-way valve 105 and the gas external port 122, a second electromagnetic valve 107 is disposed on an air pipe connecting the flow meter 103 and the power gas inlet 42, when the air amplifier 4 operates, the first electromagnetic valve 106 is closed, when the air amplifier operates, the second electromagnetic valve 107 is closed, and the first electromagnetic valve 106 and the second electromagnetic valve 107 are both disposed in the installation box 9. The first solenoid 106 and the second solenoid valve 107 are both solenoid shut-off valves.
The utility model discloses a flue gas nitrogen oxide detection device is when detecting, and first solenoid valve 106 is closed, and second solenoid valve 107 is opened, through air compressor to power gas import 42 air feed, under air amplifier 4's effect, the flue gas gets into and detects chamber 121, and flue gas nitrogen oxide sensor 3 detects the flue gas to carry the testing result for data analysis unit analysis through the data line. When the air conditioner needs to be cleaned after running for a period of time, the second electromagnetic valve 107 is closed, the first electromagnetic valve 106 is opened, high-pressure air in the energy accumulator 102 is blown to the detection joint 12 and is blown into the sampling air inlet pipe 1 through the detection joint 12, and the whole channel in the sampling air inlet pipe 1 is cleaned. When the flue gas nitrogen oxide sensor 3 needs to be calibrated and calibrated, the three-way valve 105 is controlled to enable the calibration gas source interface 1051 to be communicated with the gas external interface 122, calibration gas enters the detection cavity 121, and the flue gas nitrogen oxide sensor 3 can detect numerical values in flue gas.
The utility model discloses a flue gas monitoring system's concrete embodiment, flue gas monitoring system include flue gas nitrogen oxide detection device, air compressor, data analysis module, and air compressor forms gaseous power supply, and in other embodiments, gaseous power supply also can be the gas pitcher. The air compressor and the data analysis module are both in the prior art, and detailed description thereof is omitted in this embodiment. The structure of the flue gas nitrogen oxide detection device in this embodiment is the same as that of the flue gas nitrogen oxide detection device in the above-mentioned embodiment, and is not described again.
Claims (10)
1. Flue gas nitrogen oxide detection device, its characterized in that includes:
the sampling air inlet pipe is used for extending into the flue, the part of the sampling air inlet pipe extending out of the flue comprises a detection section with a detection cavity, the downstream of the detection section is sequentially connected with an air amplifier and an air return pipe communicated with the interior of the flue in series,
the air suction port of the air amplifier is communicated with the outlet of the detection section, the air exhaust port of the air amplifier is communicated with the air return pipe, the air amplifier is also provided with a power gas inlet which is communicated with a power gas source,
and the smoke nitrogen oxide sensor is fixed on the detection section.
2. The device for detecting nitrogen oxides in flue gas as claimed in claim 1, wherein the sampling intake pipe comprises an intake pipe body and a detection joint detachably fixed at an air outlet of the intake pipe body, the detection joint forms the detection section, and the flue gas nitrogen oxide sensor and the air amplifier are both connected to the detection joint.
3. The device for detecting the nitrogen oxides in the flue gas as claimed in claim 2, further comprising a heat-insulating protective sleeve penetrating through the heat-insulating layer of the flue and having two closed ends, wherein the sampling air inlet pipe and the air return pipe are inserted into the heat-insulating protective sleeve, the air return pipe comprises an air return pipe body arranged in the heat-insulating protective sleeve and a connector arranged at the upstream of the air return pipe body and detachably fixed with the air return pipe body, and the connector and the detection connector are both arranged outside the heat-insulating protective sleeve.
4. The device for detecting nitrogen oxides in flue gas as claimed in claim 3, wherein the detection joint is in threaded connection with the gas inlet pipe body, and the joint is positioned on one side of the detection joint, which is perpendicular to the extending direction of the heat-insulating protective sleeve.
5. The device for detecting the nitrogen oxides in the flue gas as claimed in any one of claims 1 to 4, wherein a heat-insulating cover is arranged outside the detection section.
6. The device for detecting the nitrogen oxides in the flue gas as claimed in claim 1 or 2, further comprising a heat-insulating protective sleeve which penetrates through a heat-insulating layer of the flue and is closed at two ends, wherein the sampling air inlet pipe and the air return pipe are arranged in the heat-insulating protective sleeve in a penetrating manner, and the detection section is positioned on a part of the sampling air inlet pipe which penetrates out of the heat-insulating protective sleeve.
7. The device for detecting the nitrogen oxides in the flue gas as claimed in claim 6, wherein the device further comprises an installation box, a pipeline opening is arranged on the installation box, the heat-insulating protective sleeve is fixed to the wall of the installation box at the pipeline opening, a heat-insulating plate for blocking the opening of the heat-insulating protective sleeve is arranged at the opening of the heat-insulating protective sleeve facing the wall of the installation box, and the sampling air inlet pipe and the air return pipe penetrate through the heat-insulating plate and extend into the installation box.
8. The device for detecting the nitrogen oxides in the flue gas as claimed in claim 6, wherein the part of the heat-insulating protective sleeve, which extends out of the heat-insulating layer of the flue and is close to the connecting section, is filled with heat-insulating materials.
9. The device for detecting the nitrogen oxides in the flue gas as claimed in any one of claims 1 to 4, wherein the flue gas nitrogen oxide sensor is arranged on the upper side of the detection section.
10. The flue gas monitoring system comprises a flue gas nitrogen oxide detection device and a power gas source for providing power, and is characterized in that the flue gas nitrogen oxide detection device is the flue gas nitrogen oxide detection device as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921205275.3U CN210604550U (en) | 2019-07-29 | 2019-07-29 | Flue gas nitrogen oxide detection device and flue gas monitoring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921205275.3U CN210604550U (en) | 2019-07-29 | 2019-07-29 | Flue gas nitrogen oxide detection device and flue gas monitoring system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210604550U true CN210604550U (en) | 2020-05-22 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921205275.3U Active CN210604550U (en) | 2019-07-29 | 2019-07-29 | Flue gas nitrogen oxide detection device and flue gas monitoring system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210604550U (en) |
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2019
- 2019-07-29 CN CN201921205275.3U patent/CN210604550U/en active Active
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