CN215339122U - Sampling device applied to gas concentration measurement in circulating fluidized bed furnace - Google Patents
Sampling device applied to gas concentration measurement in circulating fluidized bed furnace Download PDFInfo
- Publication number
- CN215339122U CN215339122U CN202120398340.XU CN202120398340U CN215339122U CN 215339122 U CN215339122 U CN 215339122U CN 202120398340 U CN202120398340 U CN 202120398340U CN 215339122 U CN215339122 U CN 215339122U
- Authority
- CN
- China
- Prior art keywords
- pipeline
- heat dissipation
- ash
- sample gas
- ball valve
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Abstract
The utility model provides a sampling device applied to gas concentration measurement in a circulating fluidized bed furnace, which comprises a sample gas sampling port, a heat dissipation ash remover, a laser measurement air chamber and a negative pressure generating device which are sequentially connected through a pipeline, wherein a pneumatic ball valve is arranged on the pipeline between the sample gas sampling port and the heat dissipation ash remover, a temperature sensor and a sampling main pipeline pneumatic ball valve are arranged on the pipeline between the heat dissipation ash remover and the laser measurement air chamber, and outlets of the sample gas sampling port and the negative pressure generating device are communicated with a hearth of the circulating fluidized bed. The negative pressure generating device is used for providing the negative pressure in the whole sampling device, the sample gas is rapidly cooled through the heat dissipation ash remover, the components in the sample gas are prevented from continuously reacting in the sampling device, the flow speed of the sample gas is reduced, and dust with larger particle size carried in the sample gas falls into the ash bin at the lower part of the heat dissipation ash remover and is discharged back to the hearth in the ash removing ring section.
Description
Technical Field
The utility model belongs to the technical field of desulfurization of circulating fluidized bed boilers, and particularly relates to a sampling device applied to measurement of gas concentration in a circulating fluidized bed boiler.
Background
The circulating fluidized bed boiler is a novel clean coal combustion technology with low price, has natural advantages in environmental protection operation, and is developed rapidly particularly under the background of responding to policies of energy conservation and emission reduction and meeting the environmental protection requirement of ultralow emission on the operation of government coal-fired boilers.
In the operation of the circulating fluidized bed boiler, the gas composition in the hearth can reflect the combustion process of the boiler. Through the measurement of the gas concentration in the hearth, parameters needing to be adjusted and optimized in combustion can be researched and judged, and the method has very important significance for improving the combustion efficiency and the desulfurization efficiency of the boiler, reducing the carbon content of fly ash and monitoring the escape amount of toxic and harmful gases such as hydrogen sulfide and the like.
Gas analyzers for detecting gas concentrations are commonly classified into two categories, one being electrochemical methods, where the analysis is performed by drawing a certain amount of sample gas, but the measurement results are disturbed due to interference between different components of the sample gas and factors such as dissolution and adsorption that may occur. The measurement precision is not high, and the interference is easy to happen. And cannot be measured online for a long time. The other method is that the laser method measures the concentration of each component of the gas, and the concentration of the gas is obtained by analyzing the selective absorption of the analyzed gas irradiated by the laser. However, the temperature in the hearth is very high, the ash content of flue gas is very high after the circulating fluidized bed boiler burns, the transmission of laser can be blocked, and the laser emission gas analyzer is difficult to operate normally.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a sampling device applied to gas concentration measurement in a circulating fluidized bed furnace, which overcomes the technical problems in the prior art.
Therefore, the technical scheme provided by the utility model is as follows:
the utility model provides a be applied to gas concentration measurement's in circulating fluidized bed furnace sampling device, includes the sample gas sample connection, heat dissipation ash remover, laser survey air chamber and the negative pressure generating device that connect gradually through the pipeline, be equipped with pneumatic ball valve on the pipeline between sample gas sample connection and the heat dissipation ash remover, be equipped with temperature sensor and the pneumatic ball valve of total pipeline of sample on the pipeline between heat dissipation ash remover and the laser survey air chamber, sample gas sample connection and negative pressure generating device's export all communicate with circulating fluidized bed furnace.
The pneumatic ball valve, the temperature sensor, the sampling main pipeline pneumatic ball valve and the negative pressure generating device are all in electric signal connection with the PLC control system.
The laser measurement air chamber comprises a body and a transmission lens, one end of the transmission lens is inserted into the body and is coaxial with the body, an air inlet and an air outlet are respectively formed in the upper side and the lower side of the body, the air inlet is communicated with the heat dissipation ash remover through a pipeline, and the air outlet is communicated with the negative pressure generating device through a pipeline;
the both ends of body all are connected with transmission camera lens through connection structure, and two transmission camera lenses are connected with laser emission end and laser receiving terminal respectively, install the transmission lens in the transmission camera lens, the air inlet is close to the laser emission end, the gas outlet is close to the laser receiving terminal.
The heat dissipation ash remover is including the one-level heat dissipation ash remover and the second grade ash remover that communicate in proper order, the lower part of one-level heat dissipation ash remover and second grade ash remover is hourglass hopper-shaped, the filter is equipped with in the second grade ash remover.
The bottom of the heat dissipation ash remover is communicated with the hearth of the circulating fluidized bed through an ash discharge pipeline, an ash discharge control ball valve is arranged on the ash discharge pipeline, and the ash discharge control ball valve is in electric signal connection with a PLC control system.
Still include anti-device of sweeping, anti-device of sweeping includes compressed air storage tank and compressed air heater, compressed air storage tank and compressed air heater intercommunication, an export of compressed air heater is located behind temperature sensor's mounting point through sweeping pipeline and heat dissipation ash remover and the pipeline intercommunication and the intercommunication point between the laser survey air chamber, sweep and install on the pipeline and sweep the pneumatic ball valve of compressed air control, another export of compressed air heater is connected with negative pressure generating device through electronic single seat governing valve, electronic single seat governing valve with sweep the pneumatic ball valve of compressed air control all with PLC control system electric signal connection.
The negative pressure generating device is a jet pump, an inlet of the jet pump is communicated with the laser measuring air chamber, and an outlet of the jet pump is communicated with the circulating fluidized bed hearth.
The utility model has the beneficial effects that:
the sampling device applied to the gas concentration measurement in the circulating fluidized bed provided by the utility model provides negative pressure in the whole sampling device through the negative pressure generating device, the sample gas is rapidly cooled through the heat dissipation ash remover, the continuous reaction of all components in the sample gas in the sampling device is avoided, and meanwhile, the flow velocity of the extracted sample gas is reduced, so that dust with larger particle size carried in the sample gas falls into the ash bin at the lower part of the heat dissipation ash remover and is discharged back into a hearth at an ash-removing ring.
The utility model adopts the PLC control system to carry out interlocking control on the temperature sensor and the electric single-seat regulating valve, and regulates the sample gas quantity entering the sampling device by regulating the power of the jet pump, thereby controlling the temperature of the sample gas within a set range.
Dust in the sample gas is removed through the heat dissipation dust remover, transmission of a laser excitation light source in the laser measurement air chamber can be met, the sample gas and the external environment are isolated, and real non-contact measurement is achieved. The utility model provides a good working platform for the online laser gas analyzer, is beneficial to the accurate and reliable operation of the online laser gas analyzer, and solves the problems of high temperature of a measuring point and large dust content in sample gas.
All pipelines behind the heat dissipation ash remover need wrap up insulation material to avoid water condensation after sample gas temperature dissipation reduces, especially influence measuring and downstream equipment corruption after the temperature is less than the dew point of each component in the sample gas.
After the sampling device operates for a period of time, the heat dissipation ash remover is subjected to ash removal through the reverse purging device, and the operation and maintenance cost is reduced.
The following will be described in further detail with reference to the accompanying drawings.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of one embodiment of a laser measurement gas cell.
In the figure: 1. a sample gas sampling port; 2. a pneumatic ball valve; 3. a first-stage heat dissipation ash remover; 4. a secondary ash remover; 5. a temperature sensor; 6. a filter; 7. purging the compressed gas control pneumatic ball valve; 8. a sampling main pipeline pneumatic ball valve; 9. a laser measurement air chamber; 10. a jet pump; 11. an electric single-seat regulating valve; 12. a dust-discharging control ball valve; 13. an ash discharge port; 14. a compressed air heater; 15. a PLC control system; 16. a laser emitting end; 17. a transmission lens; 18. a transmissive lens; 19. a body; 20. a laser receiving end; 21. an air inlet; 22. an air outlet; 23. a first flange; 24. and a second flange.
Detailed Description
The following description of the embodiments of the present invention is provided for illustrative purposes, and other advantages and effects of the present invention will become apparent to those skilled in the art from the present disclosure.
The exemplary embodiments of the present invention will now be described with reference to the accompanying drawings, however, the present invention may be embodied in many different forms and is not limited to the embodiments described herein, which are provided for complete and complete disclosure of the present invention and to fully convey the scope of the present invention to those skilled in the art. The terminology used in the exemplary embodiments illustrated in the accompanying drawings is not intended to be limiting of the utility model. In the drawings, the same units/elements are denoted by the same reference numerals.
Unless otherwise defined, terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Further, it will be understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and will not be interpreted in an idealized or overly formal sense.
Example 1:
the embodiment provides a sampling device for gas concentration measurement in circulating fluidized bed furnace, include sample gas sample connection 1, heat dissipation ash remover, laser survey air chamber 9 and the negative pressure generating device who connects gradually through the pipeline, pneumatic ball valve 2 is equipped with on the pipeline between sample gas sample connection 1 and the heat dissipation ash remover, temperature sensor 5 and the pneumatic ball valve 8 of the total pipeline of sample are equipped with on the pipeline between heat dissipation ash remover and the laser survey air chamber 9, sample gas sample connection 1 and negative pressure generating device's export all communicate with circulating fluidized bed furnace.
The use process comprises the following steps:
the negative pressure generating device is used for generating negative pressure inside the sampling device, after the pneumatic ball valve 2 and the sampling main pipeline pneumatic ball valve 8 are opened, the sample gas to be detected is extracted through the sample gas sampling port 1, then the sample gas enters the heat dissipation dust remover for heat dissipation and dust removal treatment, enters the laser measuring gas chamber 9 for detection after treatment, and finally the sample gas is discharged back to the hearth. The temperature sensor 5 is used for detecting the temperature of the processed sample gas and judging whether the temperature requirement is met.
Example 2:
on the basis of embodiment 1, this embodiment provides a sampling device for gas concentration measurement in circulating fluidized bed furnace, still includes PLC control system 15, pneumatic ball valve 2, temperature sensor 5, sample total pipeline pneumatic ball valve 8 and negative pressure generating device all with PLC control system 15 electric signal connection.
Automatic control is realized through the PLC control system 15, and the workload is reduced. The PLC control system 15 carries out real-time monitoring on the temperature of the processed sample gas through the temperature sensor 5, and can timely adjust the power of the negative pressure generating device, so that the flow of the sample gas is adjusted, the temperature of the sample gas meets the measurement requirement, and the measurement is fast and accurate.
Example 3:
on the basis of embodiment 1, the embodiment provides a sampling device applied to gas concentration measurement in a circulating fluidized bed furnace, the laser measurement gas chamber 9 includes a body 19 and a transmission lens 17, one end of the transmission lens 17 is inserted into the body 19 and is coaxial with the body 19, the upper side and the lower side of the body 19 are respectively provided with a gas inlet 21 and a gas outlet 22, the gas inlet 21 is communicated with a heat dissipation ash remover through a pipeline, and the gas outlet 22 is communicated with a negative pressure generating device through a pipeline;
the both ends of body 19 all are connected with transmission lens 17 through connection structure, and two transmission lens 17 are connected with laser emission end 16 and laser receiving terminal 20 respectively, install transmission lens 18 in the transmission lens 17, air inlet 21 is close to laser emission end 16, gas outlet 22 is close to laser receiving terminal 20.
The processed sample gas enters the laser measurement gas chamber 9 through the gas inlet 21, when the sample gas is completely filled in the laser measurement gas chamber 9, laser is emitted through the laser emitting end 16 and then reaches the laser receiving end 20 through the transmission lens 18, the sample gas is detected, and in the process, the sample gas is continuously extracted and is discharged back to the hearth through the gas outlet 22 after passing through the measurement gas chamber.
In the whole detection process, the sample gas on the light path in the gas chamber can be ensured to be newly extracted rather than the sample gas before being retained in the chamber, so that the sensitivity and the accuracy of the laser measuring equipment can be improved. The time difference between the measured sample gas and the sample gas in the hearth is ensured to be minimum, the 'old' sample gas before a long period of time is measured, and the measurement result is synchronous and does not lag.
Example 4:
on the basis of embodiment 1, this embodiment provides a sampling device for gas concentration measurement in circulating fluidized bed furnace, the heat dissipation ash remover includes one-level heat dissipation ash remover 3 and second grade ash remover 4 that communicate in proper order, the lower part of one-level heat dissipation ash remover 3 and second grade ash remover 4 is hourglass hopper-shaped, be equipped with filter 6 in the second grade ash remover 4.
The extracted sample gas is rapidly cooled after passing through the primary heat dissipation ash remover 3, and is rapidly cooled to below 400 ℃ from 860-1100 ℃ flue gas, so that the continuous reaction of all components of the extracted sample gas in the sampling device is avoided, the flow rate of the extracted sample gas is reduced, and dust with larger particle size carried in the sample gas can fall into a funnel-shaped ash bin at the lower part of the heat dissipation ash remover. The sample gas after primary temperature reduction and ash removal enters a secondary ash remover 4, and a filter 6 is arranged at the outlet of the secondary ash remover 4. The dust in the sample gas is filtered out by the continuous sedimentation and the filter element of the filter 6, and the dust can be discharged through the bottom.
Example 5:
on the basis of embodiment 2, this embodiment provides a sampling device for measuring gas concentration in a circulating fluidized bed furnace, the bottom of the heat dissipation ash remover is communicated with a circulating fluidized bed furnace through an ash discharge pipeline, an ash discharge control ball valve 12 is installed on the ash discharge pipeline, and the ash discharge control ball valve 12 is in electrical signal connection with a PLC control system 15.
After the sampling device operates for a period of time, the ash-dredging control ball valve 12 can be controlled to be opened through the PLC control system 15, so that dust at the bottom of the heat-dissipation ash remover is discharged into the hearth through the ash-dredging control ball valve 12 and the ash discharge port 13.
Example 6:
on the basis of embodiment 2, the embodiment provides a sampling device applied to gas concentration measurement in a circulating fluidized bed furnace, and further comprises a reverse purging device, wherein the reverse purging device comprises a compressed air storage tank and a compressed air heater 14, the compressed air storage tank is communicated with the compressed air heater 14, one outlet of the compressed air heater 14 is communicated with a pipeline between a heat dissipation ash remover and a laser measurement air chamber 9 through a purging pipeline, the communicating point is located behind the mounting point of a temperature sensor 5, a purging compressed air control pneumatic ball valve 7 is mounted on the purging pipeline, the other outlet of the compressed air heater 14 is connected with a negative pressure generating device through an electric single-seat adjusting valve 11, and the electric single-seat adjusting valve 11 and the purging compressed air control pneumatic ball valve 7 are both in electric signal connection with a PLC control system 15.
After the sampling device operates for a period of time, the reverse blowing device is needed to perform reverse blowing ash removal on the heat dissipation ash remover. After the back-flushing ash-removing program is started, firstly, the pneumatic ball valve 2 is closed, all the extraction of the sample gas is cut off, and simultaneously, the pneumatic ball valve 8 of the sampling main pipeline is closed, and the pipeline of the sample gas entering the laser measurement air chamber 9 is cut off. And unlocking the linkage of the temperature sensor 5 and the electric single-seat regulating valve 11, opening the ash-removing control ball valve 12 and the blowing compressed air control pneumatic ball valve 7, and removing ash from the cooling ash remover through hot compressed air in the compressed air heater 14.
And after the ash removal is finished, closing the ash removal control ball valve 12 and blowing the compressed air control pneumatic ball valve 7, opening the pneumatic ball valve 2, interlocking the temperature sensor 5 and the electric single-seat regulating valve 11, and starting normal sampling measurement.
Example 7:
on the basis of embodiment 2, this embodiment provides a sampling device applied to gas concentration measurement in a circulating fluidized bed furnace, where the negative pressure generating device is a jet pump 10, an inlet of the jet pump 10 is communicated with a laser measurement gas chamber 9, and an outlet of the jet pump 10 is communicated with a hearth of the circulating fluidized bed furnace.
In this embodiment, the jet pump 10 generates negative pressure to extract the sample gas, and the detected sample gas is finally discharged back to the furnace chamber through the jet pump 10 along the pipeline.
Example 8:
the embodiment provides a sampling device for gas concentration measurement in circulating fluidized bed furnace, as shown in fig. 1, including PLC control system 15 and through sample gas sample connection 1, pneumatic ball valve 2, the heat dissipation ash separator (including one-level heat dissipation ash separator 3 and second grade ash separator 4), the total pipeline pneumatic ball valve 8 of sample and the laser measurement air chamber 9 that the pipeline communicates in proper order, install temperature sensor 5 on the pipeline between the total pipeline pneumatic ball valve 8 of second grade ash separator 4 and sample. The air outlet 22 of the laser measurement air chamber 9 is connected with a jet pump 10 for generating negative pressure; an outlet of the jet pump 10 is communicated with the hearth, the other inlet of the jet pump 10 is communicated with a compressed air heater 14, the compressed air heater 14 is connected with a compressed air storage tank (not marked in the figure), an outlet of the compressed air heater 14 is communicated with a pipeline between the secondary ash remover 4 and the sampling main pipeline pneumatic ball valve 8 through a purging pipeline, the communicating point is located between the temperature sensor 5 and the sampling main pipeline pneumatic ball valve 8, and the purging pipeline is provided with a purging compressed air control pneumatic ball valve 7.
The bottoms of the first-stage heat dissipation ash remover 3 and the second-stage ash remover 4 are communicated with a hearth through an ash discharge pipeline, and an ash discharge control ball valve 12 is arranged on the ash discharge pipeline. The pneumatic ball valve 2, the sampling main pipeline pneumatic ball valve 8, the jet pump 10, the temperature sensor 5, the blowing compressed gas control pneumatic ball valve 7 and the ash discharge control ball valve 12 are all in electric signal connection with a PLC control system 15.
As shown in fig. 2, the laser measurement air chamber 9 includes a body 19 and a transmission lens 17, one end of the transmission lens 17 is inserted into the body 19 and is coaxial with the body 19, the upper side and the lower side of the body 19 are respectively provided with an air inlet 21 and an air outlet 22, the air inlet 21 is communicated with the heat dissipation ash remover through a pipeline, and the air outlet 22 is communicated with the jet pump 10 (negative pressure generating device) through a pipeline; the two ends of the body 19 are connected with the transmission lenses 17 through the connecting structure, the two transmission lenses 17 are respectively connected with the laser emitting end 16 and the laser receiving end 20, the transmission lenses 18 are installed in the transmission lenses 17, the air inlet 21 is close to the laser emitting end 16, and the air outlet 22 is close to the laser receiving end 20.
In this embodiment, the connecting structure on the body 19 is a flange, the middle of the transmission lens 17 is provided with a first flange 23 matched with the flange, the right end of the transmission lens 17 connected with the laser emitting end 16 is inserted into the body 19, the left end of the transmission lens 17 is provided with a second flange 24, and the second flange 24 is connected with the laser emitting end 16 through the flange. The laser receiver 20 is connected in the same manner as described above.
This embodiment provides the inside negative pressure of whole sampling device through jet pump 10, finally through the sample gas sampling port 1 extraction needs the sample gas that detects, the more than 1 mouth can be selected according to the technology needs to sample gas sampling port 1, selects the sample gas of extracting that branch road to detect according to the technology needs when using, selects and controls to realize through PLC control pneumatic ball valve 2, opens the pneumatic ball valve 2 on the branch road that needs the sample, closes the ball valve on other branch roads. The sampled gas passes through the primary heat dissipation ash remover 3, the sample gas is rapidly cooled, the extracted flue gas of 860-1100 ℃ is rapidly cooled to below 400 ℃ so as to avoid the continuous reaction of all components of the extracted sample gas in the sampling device, and simultaneously, the flow rate of the extracted sample gas is reduced, and dust with larger particle size carried in the sample gas can fall into an ash bin at the lower part of the heat dissipation ash remover and is discharged back to the hearth in an ash-removing ring section. The sample gas after primary temperature reduction and ash removal enters a secondary ash remover 4, and a filter 6 is arranged at the outlet of the secondary ash remover 4. And removing dust in the sample gas by continuous sedimentation and filtration of a filter element of a filter 6, and discharging the removed dust back to the hearth at a dust removing ring section.
The temperature sensor 5 monitors the temperature of the sample gas on the outlet pipe of the secondary ash remover 4. The temperature of the sample gas is controlled at 200 ℃. + -. 20 ℃. The temperature is controlled by adjusting the power of the jet pump 10 to adjust the amount of sample gas entering the sampling device. When appearance gas temperature is higher, through the aperture of adjusting electronic single seat governing valve 11, reduce compressed air's volume and reduce the power of jet pump 10, the volume of sampling device extraction appearance gas can reduce, the energy of sampling device appearance gas dissipation remains unchanged basically, the temperature of appearance gas can reduce like this, otherwise, the temperature of appearance gas is crossed lowly, then need increase the aperture of governing valve, improve jet pump 10's power, the volume of the appearance gas of extraction increases, the corresponding can promotion of the temperature of appearance gas.
The dedusted sample gas with the temperature suitable for the temperature enters the laser measurement air chamber 9, and the gas analyzer arranged on the air chamber starts to work, detect and output the detection data. The detected sample gas is finally discharged back to the hearth along a pipeline through the jet pump 10.
All pipelines behind the outlet of the secondary ash remover 4 need to be wrapped with heat insulation materials so as to avoid water condensation after the temperature of the sample gas is reduced, and particularly, the temperature of the sample gas is lower than the dew point of each component in the sample gas to influence measurement and corrode downstream equipment.
After sampling device operation a period, can amass certain ash in the ash storehouse in one-level heat dissipation ash remover 3, the second grade ash remover 4, need arrange the ash back furnace through dredging the ash to 6 surperficial deposition that also can of filter need the blowback deashing. After the compressed air is heated by the compressed air heater 14, the compressed air is blown through the valve to control the pneumatic ball valve 7 to enter the system to be used as a back blowing air source, the filter 6 can be blown, and meanwhile, a positive pressure can be given to the device to be used as an ash dredging power source of the first-stage heat dissipation ash remover 3 and the second-stage ash remover 4.
After the ash removal program is started, the pneumatic ball valve 2 is firstly closed, all the extraction of the sample gas is cut off, meanwhile, the pneumatic ball valve 8 of the sampling main pipeline is closed, and the pipeline of the sample gas entering the laser measurement gas chamber 9 is cut off. Unlocking the linkage of the temperature sensor 5 and the electric single-seat regulating valve 11. Open the dust control ball valve 12 that dredges on one-level heat dissipation ash remover 3, the ash removal pipeline of second grade ash remover 4 respectively, open and sweep compressed air control pneumatic ball valve 7, begin to dredge the ash through hot compressed air to one-level heat dissipation ash remover 3 and second grade ash remover 4 to the adnexed dust on the clearance filter 6.
And after the ash removal is finished, closing the blowing compressed air control pneumatic ball valve 7 and the ash removal control ball valve 12, opening the pneumatic ball valve 2 on the branch to be sampled, interlocking the temperature sensor 5 and the electric single-seat regulating valve 11, and starting normal sampling measurement.
The sampling device is provided with a laser measurement air chamber 9 (shown in figure 2) for installing the laser method gas analyzer, the laser measurement air chamber 9 is provided with a transmission lens 17 for transmitting the excitation light source of the laser, and simultaneously, the sample gas and the external environment are isolated, so that the real non-contact measurement is realized. Because the laser measuring equipment can resist the temperature of only 85 ℃ at most and the temperature of the measured sample gas is 200 +/-20 ℃, if the laser measuring equipment is in a contact type measuring mode, the lens is required to be cooled, cold compressed air is generally introduced for cooling, but the air is mixed into the sample gas to reduce the concentration of each component in the sample gas, and the temperature is reduced to reduce the SO in the sample gas2Ammonium salt crystals of ammonium bisulfate can be formed with ammonia and water vapor, and finally the crystals are attached to the surface of the lens to reduce light transmittance so as to finally and completely shield light, so that the analyzer cannot work, the lens needs to be cleaned and replaced regularly, and the operation and maintenance cost is increased.
The transmission lens 17 is flanged to the body 19 of the laser measurement cell 9. The two ends of the body 19 are provided with an air inlet 21 and an air outlet 22, and the sample gas is completely filled and passes through the measuring gas chamber, so that the sample gas on the light path in the gas chamber is the newly extracted sample gas instead of the previous sample gas staying in the chamber. The sensitivity and accuracy of the device can be improved. The time difference between the measured sample gas and the sample gas in the hearth is ensured to be minimum, the 'old' sample gas before a long period of time is measured, and the measurement result is not delayed.
Example 9:
the embodiment provides a method for measuring the gas concentration in a circulating fluidized bed furnace, which adopts a sampling device applied to the gas concentration measurement in the circulating fluidized bed furnace and comprises the following steps:
step 1) starting a negative pressure generating device, opening a pneumatic ball valve 2 and a sampling main pipeline pneumatic ball valve 8, and extracting sample gas to be detected through a sample gas sampling port 1;
step 2), the temperature of the sample gas is reduced to 200 +/-20 ℃ after the sample gas passes through a heat dissipation ash remover, and meanwhile, dust carried in the sample gas is settled under the action of gravity;
and 3) the cooled and dedusted sample gas enters a laser measurement gas chamber 9 for detection to obtain detection data, and the detected sample gas is discharged back to the hearth along a pipeline.
The temperature of the sample gas after temperature reduction and dust removal is measured by the temperature sensor 5 before the sample gas enters the laser measurement air chamber 9, when the temperature of the sample gas is lower than a set temperature range, the PLC control system 15 sends a signal to the electric single-seat regulating valve 11 and the negative pressure generating device, the opening degree of the electric single-seat regulating valve 11 is increased, the power of the negative pressure generating device is improved, the amount of the extracted sample gas is increased, and the temperature of the sample gas is improved.
Example 10:
on the basis of the embodiment 9, the embodiment provides a method for measuring the gas concentration in a circulating fluidized bed furnace, after a sampling device operates for a period of time, the linkage between a temperature sensor 5 and an electric single-seat regulating valve 11 is unlocked, a PLC control system 15 controls to open and purge a compressed air control pneumatic ball valve 7 and an ash discharge control ball valve 12 on an ash discharge pipeline, the heat dissipation ash remover is subjected to ash discharge through hot compressed air in a compressed air heater 14, and dust is discharged back to a hearth through an ash discharge port 13;
and after the ash removal is finished, closing the blowing compressed air control pneumatic ball valve 7 and the ash removal control ball valve 12, opening the pneumatic ball valve 2 on the pipeline where the sample gas sampling port 1 is located, interlocking the temperature sensor 5 and the electric single-seat regulating valve 11, and starting normal sampling measurement.
The utility model provides a good working platform for the online laser gas analyzer, is beneficial to the accurate and reliable operation of the online laser gas analyzer, and solves the problems of high temperature of a measuring point and large dust content in sample gas.
The above examples are merely illustrative of the present invention and should not be construed as limiting the scope of the utility model, which is intended to be covered by the claims and any design similar or equivalent to the scope of the utility model.
Claims (7)
1. The utility model provides a be applied to circulating fluidized bed furnace gas concentration measurement's sampling device which characterized in that: include the appearance gas sample connection, heat dissipation ash removal ware, laser survey air chamber and the negative pressure generating device that connect gradually through the pipeline, pneumatic ball valve is equipped with on the pipeline between appearance gas sample connection and the heat dissipation ash removal ware, temperature sensor and the pneumatic ball valve of the total pipeline of sample are equipped with on the pipeline between heat dissipation ash removal ware and the laser survey air chamber, appearance gas sample connection and negative pressure generating device's export all communicate with circulating fluidized bed furnace.
2. The sampling device for measuring the gas concentration in the circulating fluidized bed furnace according to claim 1, wherein: the pneumatic ball valve, the temperature sensor, the sampling main pipeline pneumatic ball valve and the negative pressure generating device are all in electric signal connection with the PLC control system.
3. The sampling device for measuring the gas concentration in the circulating fluidized bed furnace according to claim 1, wherein: the laser measurement air chamber comprises a body and a transmission lens, one end of the transmission lens is inserted into the body and is coaxial with the body, an air inlet and an air outlet are respectively formed in the upper side and the lower side of the body, the air inlet is communicated with the heat dissipation ash remover through a pipeline, and the air outlet is communicated with the negative pressure generating device through a pipeline;
the both ends of body all are connected with transmission camera lens through connection structure, and two transmission camera lenses are connected with laser emission end and laser receiving terminal respectively, install the transmission lens in the transmission camera lens, the air inlet is close to the laser emission end, the gas outlet is close to the laser receiving terminal.
4. The sampling device for measuring the gas concentration in the circulating fluidized bed furnace according to claim 1, wherein: the heat dissipation ash remover is including the one-level heat dissipation ash remover and the second grade ash remover that communicate in proper order, the lower part of one-level heat dissipation ash remover and second grade ash remover is hourglass hopper-shaped, the filter is equipped with in the second grade ash remover.
5. The sampling device for measuring the gas concentration in the circulating fluidized bed furnace according to claim 2, wherein: the bottom of the heat dissipation ash remover is communicated with the hearth of the circulating fluidized bed through an ash discharge pipeline, an ash discharge control ball valve is arranged on the ash discharge pipeline, and the ash discharge control ball valve is in electric signal connection with a PLC control system.
6. The sampling device for measuring the gas concentration in the circulating fluidized bed furnace according to claim 2, wherein: still include anti-device of sweeping, anti-device of sweeping includes compressed air storage tank and compressed air heater, compressed air storage tank and compressed air heater intercommunication, an export of compressed air heater is located behind temperature sensor's mounting point through sweeping pipeline and heat dissipation ash remover and the pipeline intercommunication and the intercommunication point between the laser survey air chamber, sweep and install on the pipeline and sweep the pneumatic ball valve of compressed air control, another export of compressed air heater is connected with negative pressure generating device through electronic single seat governing valve, electronic single seat governing valve with sweep the pneumatic ball valve of compressed air control all with PLC control system electric signal connection.
7. The sampling device for measuring the gas concentration in the circulating fluidized bed furnace according to claim 2, wherein: the negative pressure generating device is a jet pump, an inlet of the jet pump is communicated with the laser measuring air chamber, and an outlet of the jet pump is communicated with the circulating fluidized bed hearth.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120398340.XU CN215339122U (en) | 2021-02-23 | 2021-02-23 | Sampling device applied to gas concentration measurement in circulating fluidized bed furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120398340.XU CN215339122U (en) | 2021-02-23 | 2021-02-23 | Sampling device applied to gas concentration measurement in circulating fluidized bed furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215339122U true CN215339122U (en) | 2021-12-28 |
Family
ID=79581711
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120398340.XU Active CN215339122U (en) | 2021-02-23 | 2021-02-23 | Sampling device applied to gas concentration measurement in circulating fluidized bed furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215339122U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115855578A (en) * | 2023-01-31 | 2023-03-28 | 连云港利源电力节能设备有限公司 | Pulverized coal circulating sampler |
| CN115855578B (en) * | 2023-01-31 | 2024-05-14 | 连云港利源电力节能设备有限公司 | Pulverized coal circulating sampler |
-
2021
- 2021-02-23 CN CN202120398340.XU patent/CN215339122U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115855578A (en) * | 2023-01-31 | 2023-03-28 | 连云港利源电力节能设备有限公司 | Pulverized coal circulating sampler |
| CN115855578B (en) * | 2023-01-31 | 2024-05-14 | 连云港利源电力节能设备有限公司 | Pulverized coal circulating sampler |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105865853A (en) | Online analysis system of ship exhaust emission | |
| CN101398370B (en) | High temperature corrosion on-line monitoring system for boiler water-cooled wall | |
| CN205642942U (en) | Boats and ships exhaust emission online analysis system | |
| CN201207023Y (en) | On-line measurement system for boiler discharging flue gas field | |
| CN202974730U (en) | Flue gas sampler with heating and back-blowing functions | |
| CN105675810B (en) | A kind of monitoring method of boiler water-cooling wall high-temperature corrosion atmosphere monitoring system and high-temperature corrosion atmosphere | |
| CN104407161A (en) | Smoke gas on-line monitoring system and smoke gas on-line monitoring method | |
| CN101619859B (en) | Stratified combustion on-line optimization control system of boiler coal dust and optimization method thereof | |
| CN104007072B (en) | For Benitration reactor the escaping of ammonia on-line measurement device | |
| CN101858591B (en) | Diagnosis and prevention system and method of high temperature corrosion state of boiler water cooled wall | |
| CN104457852A (en) | On-line monitoring system for greenhouse gas emission of fixed combustion source | |
| CN207570856U (en) | A kind of Denitration in Boiler SCR device outlet flue grid sampling system | |
| CN102494980A (en) | Concentration measuring and sampling device for high-temperature pressured dust | |
| CN109737898A (en) | A kind of system for realizing on-line testing water wall high temperature corrosion | |
| CN106950168A (en) | The monitor control system and method for high-temperature corrosion of power station boiler | |
| CN215339122U (en) | Sampling device applied to gas concentration measurement in circulating fluidized bed furnace | |
| CN201811207U (en) | High temperature corrosion state diagnosing and preventing system for water wall of boiler | |
| CN110044661A (en) | A kind of measuring system and method monitoring boiler back end ductwork total cross-section CO concentration | |
| CN212301504U (en) | Ammonia escape measuring system for partitioned sampling | |
| CN208092007U (en) | A kind of fired power generating unit is pluggable, diversification interface type CO2Monitoring system | |
| CN108489537A (en) | A kind of heater for rolling steel pollutant emission automatic monitoring device | |
| CN111766349A (en) | Partitioned sampling ammonia escape measurement system and method | |
| CN108572146B (en) | Automatic monitoring method and monitoring system for smoke pollutants | |
| CN205679426U (en) | Wholegrain footpath on-line period device | |
| CN102207289B (en) | Device and method for regulating flue gas ingredients of side wall water cooling wall of front-rear wall hedging combustion boiler automatically |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |