CN215894526U - Novel boiler high-temperature anti-corrosion furnace flue gas on-line measurement device - Google Patents
Novel boiler high-temperature anti-corrosion furnace flue gas on-line measurement device Download PDFInfo
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- CN215894526U CN215894526U CN202120555833.XU CN202120555833U CN215894526U CN 215894526 U CN215894526 U CN 215894526U CN 202120555833 U CN202120555833 U CN 202120555833U CN 215894526 U CN215894526 U CN 215894526U
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Abstract
The utility model discloses a novel on-line measuring device for flue gas of a high-temperature anticorrosive furnace of a boiler, which comprises a boiler furnace, a monitoring system case, a plurality of heat tracing sample gas pipes, an anti-blocking switching electromagnet, a sampling inspection valve, a sample gas confluence device, an anti-blocking purging pipe and a plurality of filtering samplers. The utility model solves the problem that the prior device automatically pretreats the sample gas through the procedures of precooling, heat tracing, drying, filtering and the like, optimizes the control flow and thoroughly solves the outstanding problems of poor stability and reliability and the like of the conventional equipment under severe working conditions by arranging a calibration three-way switching valve, a touch display screen, a suction pump, a flow regulating valve, a PLC (programmable logic controller), an electrochemical reducing gas sensor group, an infrared reducing gas sensor group, a sample gas collector, a sample gas refrigerating unit, a peristaltic pump, an anti-blocking switching electromagnet, a pressure switch, a heat tracing sample gas pipe, a sampling inspection valve, a filter, a flowmeter and a filtering sampler.
Description
Technical Field
The utility model belongs to an analysis and measurement device which can accurately measure the content of reducing gas components near a water-cooled wall of a boiler hearth in real time and avoid corrosion of high-temperature reducing gas to the water-cooled wall of the boiler hearth.
Background
In recent years, with the development of boilers with large capacity and high parameters and the further improvement of environmental protection on the pollutant discharge requirement of coal-fired power stations, low-nitrogen combustion technologies represented by air classification and pulverized coal thick-thin combustion are widely applied, the core principle of the low-nitrogen combustion technology is to create a fuel-rich reducing area with insufficient air by reasonably organizing the flow field distribution of air and pulverized coal, but if the reducing flow field is not reasonably controlled, the fuel-rich reducing area can be flushed to a water wall pipe at the boundary of a hearth, so that a large area of reducing atmosphere can be formed in the area near the water wall, and further the high-temperature corrosion of the water wall can be caused, if the low-nitrogen combustion technology is developed, when the water wall pipe is reduced to a certain degree, a pipe explosion accident of the boiler can be caused, the safe and economic operation of a boiler unit is seriously threatened, therefore, from the viewpoint of the operation safety of the boiler, the concentration of reducing gas components near the water wall of the hearth of the boiler needs to be detected in real time, and additional technical measures are taken in time to control the concentration of the reducing gas components in the area near the water-cooled wall of the coal-fired boiler so as to slow down high-temperature corrosion and ensure the safe operation of the boiler.
The device fully considers the characteristics of high temperature, high humidity, high dust and the like of the flue gas of the boiler hearth, automatically preprocesses the sample gas through procedures of precooling, heat tracing, drying, filtering and the like, optimizes the control flow, thoroughly solves the outstanding problems of poor stability and reliability and the like of the conventional equipment under severe working conditions, and ensures that the reducing gas sensor group can accurately, stably and reliably complete the measurement of the content of the reducing gas components near the water-cooled wall in the boiler hearth in real time.
SUMMERY OF THE UTILITY MODEL
Aiming at the problems in the prior art, the utility model provides a novel on-line measuring device for high-temperature anticorrosive furnace flue gas of a boiler, which has the advantages of accurately measuring the content of reducing gas components near the water-cooled wall of the boiler furnace in real time and avoiding the corrosion of the high-temperature reducing gas to the water-cooled wall of the boiler furnace, solves the problems that the conventional device automatically pretreats sample gas through the procedures of precooling, heat tracing, drying, filtering and the like, optimizes a control flow, and thoroughly solves the outstanding problems that the conventional device has poor stability and reliability under severe working conditions.
The utility model is realized in such a way, a novel boiler high-temperature anticorrosion hearth smoke online measuring device comprises a boiler hearth, a monitoring system case, a plurality of heat tracing sample gas pipes, an anti-blocking switching solenoid, a sampling inspection valve, a sample gas collector, an anti-blocking purging pipe and a plurality of filtering samplers, wherein the plurality of filtering samplers are welded and installed on a water-cooled wall fin of the boiler hearth, the sampling inspection valve is connected with the filtering samplers through the heat tracing sample gas pipes, the plurality of sampling inspection valves are connected with the sample gas collector, the anti-blocking switching solenoid is connected with external compressed air, the anti-blocking switching solenoid is matched with the filtering samplers through the anti-blocking purging pipe, the output end of the sample gas collector is connected with a refrigerating unit, the output end of the refrigerating unit is connected with a filter, the output end of the filter is connected with a flow meter, and the output end of the flow meter is communicated with a calibration three-way switching valve, the top and the standard gas intercommunication of calibration three-way switching valve, the right side intercommunication of calibration three-way switching valve has the suction pump, the right side of suction pump is connected with flow control valve, flow control valve's right side intercommunication has reducing gas sensor group, and reducing gas sensor group is connected with the PLC controller through the data communication line, the PLC controller is connected with touch display screen through the data communication line.
Preferably, the filtering sampler comprises a stainless steel sampling tube, a radiating fin and a stainless steel sintered filter element, wherein the surface of the stainless steel sintered filter element is plated with an anti-sticking nano coating, and a sample gas outlet of the filtering sampler and the anti-blocking purging tube are separately arranged.
Preferably, the number of the sampling inspection valves in the monitoring system case is consistent with the number of the installed filtering samplers, and the sampling inspection valves correspond to the filtering samplers one by one.
Preferably, the refrigeration unit is a compressor for refrigeration, the bottom of the refrigeration unit is connected with a peristaltic pump, the output end of the peristaltic pump extends to the outer side of the monitoring system case, and the surface of the anti-blocking purging pipe is provided with a pressure switch.
Preferably, the reducing gas sensor group adopts a double reducing gas sensor group measurement structure mode, which is respectively as follows: the infrared reducing gas sensor group is used for conventional detection of sample gas and the electrochemical reducing gas sensor group is used for calibration detection.
Preferably, the PLC is used for completing the switching control of the automatic sampling inspection valve, the calibration three-way switching valve and the anti-blocking switching electromagnetism and the start-stop control of the suction pump and the peristaltic pump according to the system measurement condition.
Preferably, the calibration three-way switching valve, the touch display screen, the suction pump, the flow regulating valve, the PLC, the electrochemical reducing gas sensor group, the infrared reducing gas sensor group, the sample gas collector, the refrigeration unit, the peristaltic pump, the anti-blocking switching solenoid, the pressure switch, the sampling inspection valve, the filter and the flowmeter are all located inside the monitoring system case.
Compared with the prior art, the utility model has the following beneficial effects:
1. the utility model solves the problem that the prior device automatically pretreats the sample gas through the procedures of precooling, heat tracing, drying, filtering and the like, optimizes the control flow and thoroughly solves the outstanding problems of poor stability and reliability and the like of the conventional equipment under severe working conditions by arranging a calibration three-way switching valve, a touch display screen, a suction pump, a flow regulating valve, a PLC (programmable logic controller), an electrochemical reducing gas sensor group, an infrared reducing gas sensor group, a sample gas collector, a sample gas refrigerating unit, a peristaltic pump, an anti-blocking switching electromagnet, a pressure switch, a heat tracing sample gas pipe, a sampling inspection valve, a filter, a flowmeter and a filtering sampler.
2. The filtering sampler comprises the stainless steel sampling tube, the radiating fins and the stainless steel sintered filter element, the combination of the stainless steel sampling tube and the radiating fins can rapidly cool high-temperature flue gas in an air cooling mode, the surface of the stainless steel sintered filter element is coated with the anti-sticking nano coating, and the stainless steel sintered filter element has the characteristics of wear resistance, sticking resistance, good filtering effect and the like, and the sample gas outlet of the filtering sampler and the anti-blocking purging tube are separately arranged, so that the sample gas and the back-purging gas are truly separated, the representativeness of the sample gas is ensured, and the anti-blocking purging effect of the filtering sampler is ensured.
3. According to the utility model, the number of the sampling inspection valves is consistent with that of the installed filtering samplers, the sampling inspection valves correspond to one another, each sampling inspection valve controls the sampling of one filtering sampler, and the opening and closing of different sampling inspection valves are automatically controlled by the PLC, so that the functions of single sequence or selective sampling detection of different filtering sampler measuring points, mixed sampling detection of any plurality of measuring points and the like can be realized.
4. The utility model adopts the reliable compressor to refrigerate through the refrigerating unit, ensures that the water vapor in the sample gas can be fully condensed at low temperature, ensures the drying of the measured sample gas, reduces the measurement error of the monitoring reducing gas sensor group, improves the measurement precision, and automatically discharges the liquid condensed at low temperature out of the monitoring system cabinet through the peristaltic pump.
5. According to the utility model, the reducing gas sensor group adopts a double reducing gas sensor group measurement structure mode, when the calibration and detection are needed, the electrochemical reducing gas sensor group is calibrated by using the standard gas, and then the infrared reducing gas sensor group is calibrated by using the calibrated electrochemical reducing gas sensor group, so that the long-term, stable and accurate operation of the infrared reducing gas sensor group is ensured, and the accuracy of the monitoring and detection is ensured.
Drawings
Fig. 1 is a diagram of a measurement system provided by an embodiment of the utility model.
In the figure: 1. calibrating the three-way switching valve; 2. a touch display screen; 3. a suction pump; 4. a flow regulating valve; 5. A PLC controller; 6. an electrochemical reducing gas sensor group; 7. an infrared reducing gas sensor group; 8. A sample gas collector; 9. the sample gas passes through a refrigeration unit; 10. a peristaltic pump; 11. anti-blocking switching electromagnetism; 12. a pressure switch; 13. a heat tracing sample gas pipe; 14. sampling inspection valves; 15. a filter; 16. a flow meter; 17. and (5) filtering the sampler.
Detailed Description
In order to further understand the contents, features and effects of the present invention, the following embodiments are illustrated and described in detail with reference to the accompanying drawings.
The structure of the present invention will be described in detail below with reference to the accompanying drawings.
As shown in FIG. 1, the novel boiler high-temperature anticorrosion hearth flue gas online measurement device provided by the embodiment of the utility model comprises a boiler hearth, a monitoring system case, a plurality of heat tracing sample gas pipes 13, an anti-blocking switching solenoid 11, a sampling inspection valve 14, a sample gas collector 8, an anti-blocking purging pipe and a plurality of filtering samplers 17, wherein the plurality of filtering samplers 17 are welded on a water-cooled wall fin of the boiler hearth, the sampling inspection valve 14 is connected with the filtering samplers 17 through the heat tracing sample gas pipes 13, the plurality of sampling inspection valves 14 are connected with the sample gas collector 8, the anti-blocking switching solenoid 11 is connected with external compressed air, the anti-blocking switching solenoid 11 is matched with the filtering samplers 17 through the anti-blocking purging pipe, the output end of the sample gas collector 8 is connected with a refrigeration unit, the output end of the refrigeration unit is connected with a filter 15, the output end of the filter 15 is connected with a flow meter 16, the output UNICOM of flowmeter 16 has calibration three way switching valve 1, calibration three way switching valve 1's top and standard gas intercommunication, calibration three way switching valve 1's right side intercommunication has suction pump 3, suction pump 3's right side is connected with flow control valve 4, flow control valve 4's right side intercommunication has reductive gas sensor group, and reductive gas sensor group is connected with PLC controller 5 through the data communication line, PLC controller 5 is connected with touch display screen 2 through the data communication line.
Referring to fig. 1, the filtering and sampling device 17 is composed of a stainless steel sampling tube, a heat dissipation fin and a stainless steel sintered filter element, wherein the surface of the stainless steel sintered filter element is plated with an anti-sticking nano coating, and a sample gas outlet of the filtering and sampling device 17 is separated from an anti-blocking purging tube.
Adopt above-mentioned scheme: through filtering sampler 17 by the stainless steel sampling tube, radiating fin and stainless steel sintering filter core constitute, stainless steel sampling tube and radiating fin's combination can pass through air cooling's mode rapid cooling with the flue gas of high temperature, stainless steel sintering filter core surface has plated antiseized nano-coating, it is wear-resisting to have, antiseized and filter effect characteristics such as good, 17 appearance gas outlets of filtering sampler adopt the separation arrangement with stifled sweeping pipe, make appearance gas and blowback gas realize real separation, the representative of having guaranteed appearance gas has ensured filtering sampler 17's stifled effect of sweeping simultaneously.
Referring to fig. 1, the number of sample routing inspection valves 14 in the monitoring system chassis corresponds to the number of installed filter samplers 17, one to one.
Adopt above-mentioned scheme: through the number of the sampling inspection valves 14 is consistent with the number of the installed filtering samplers 17, the sampling inspection valves 14 are in one-to-one correspondence, each sampling inspection valve 14 controls the sampling of one filtering sampler 17, and the PLC 5 automatically controls the opening and closing of different sampling inspection valves 14, so that the functions of single sequence or selective sampling detection of different measuring points of the filtering sampler 17, mixed sampling detection of any plurality of measuring points and the like can be realized.
Referring to fig. 1, the refrigeration unit is a compressor for refrigeration, a peristaltic pump 10 is connected to the bottom of the refrigeration unit, the output end of the peristaltic pump 10 extends to the outside of the monitoring system case, and a pressure switch 12 is arranged on the surface of the anti-blocking purging pipe.
Adopt above-mentioned scheme: the reliable compressor is adopted for refrigeration through the refrigeration unit, so that the water vapor in the sample gas can be fully condensed at low temperature, the drying of the measured sample gas is ensured, the measurement error of the monitoring reducing gas sensor group is reduced, the measurement precision is improved, and the liquid condensed at low temperature is automatically discharged out of the monitoring system cabinet through the peristaltic pump 10.
Referring to fig. 1, the reducing gas sensor group adopts a double reducing gas sensor group measurement structure mode, which is respectively: the infrared reducing gas sensor group 7 is used for the conventional detection of the sample gas and the electrochemical reducing gas sensor group 6 is used for the calibration detection.
Adopt above-mentioned scheme: by adopting a double reducing gas sensor group measuring structure mode through the reducing gas sensor group, when the electrochemical reducing gas sensor group 6 needs to be calibrated and detected by using a standard gas, the infrared reducing gas sensor group 7 is calibrated by using the calibrated electrochemical reducing gas sensor group 6, so that the long-term, stable and accurate operation of the infrared reducing gas sensor group 7 is ensured, and the accuracy of the detection of monitoring is ensured.
Referring to fig. 1, the PLC controller 5 performs switching control of the automatic sampling inspection valve 14, the calibration three-way switching valve 1 and the anti-blocking switching solenoid 11, and start/stop control of the suction pump 3 and the peristaltic pump 10 according to the system measurement conditions.
Referring to fig. 1, a calibration three-way switching valve 1, a touch display screen 2, a suction pump 3, a flow control valve 4, a PLC controller 5, an electrochemical reducing gas sensor group 6, an infrared reducing gas sensor group 7, a sample gas confluence device 8, a refrigeration unit, a peristaltic pump 10, an anti-blocking switching solenoid 11, a pressure switch 12, a sampling inspection valve 14, a filter 15 and a flowmeter 16 are all located inside a monitoring system case.
The working principle of the utility model is as follows:
when in use, the device is controlled by a PLC (programmable logic controller) 5 in a monitoring system case, a flue gas sample near a water-cooled wall in a hearth is automatically extracted by a suction pump 3, a sample gas is preliminarily cooled and filtered by a filtering sampler 17, and then is connected with different sampling inspection valves 14 arranged in the monitoring system cabinet through respective heat tracing sample gas pipes 13, the sample gas is collected in a sample gas collector 8 after passing through different sample gas inspection valves and is connected to a refrigerating unit through a uniform outlet, after the sample gas is cooled and dried by the refrigerating unit 9, condensate of the sample gas is discharged out of the monitoring system case through a peristaltic pump 10, the cooled and dried sample gas passes through a filter 15, a flowmeter 16 and a calibration three-way switching valve 1, is sucked by the suction pump 3 through a flow regulating valve 4 to a reducing gas sensor group and the like to complete detection of reducing gas components of the sample gas, and a detection result is uploaded to the PLC 5 through a data communication line to be analyzed and processed and is transmitted to a centralized control room for monitoring and inspection by operators When the content of the reducing gas detected by the device exceeds the specified limit value and is easy to cause serious high-temperature corrosion to a water wall pipe of a boiler hearth, operation personnel are guided to find the problem in time and solve the problem through combustion air distribution adjustment, so that the pipe explosion accident caused by the fact that the water wall is thinned to a certain degree due to the high-temperature corrosion is avoided, the operation safety of the boiler is threatened, when the flow of the sample gas is reduced as monitored by the flow meter 16, the monitoring system automatically starts an anti-blocking back blowing mode, dry high-pressure compressed air passes through the anti-blocking switching electromagnet 11, the anti-blocking purging pipe directly purges the filter sampler 17, the pressure switch 12 arranged on the anti-blocking purging pipe confirms whether the filter sampler 17 is dredged according to the pressure change condition, the automatic anti-blocking purging function is realized, and when the equipment operates for a period of time, the system enters an automatic calibration mode, the system automatically completes the zero point and full-scale calibration of the reductive sensor group under the control of the PLC 5 so as to ensure the accuracy of measurement and realize the automatic calibration function.
In summary, the following steps: this novel anticorrosive furnace flue gas on-line measuring device of boiler high temperature, through setting up calibration three-way switch valve 1, touch display screen 2, suction pump 3, flow control valve 4, PLC controller 5, electrochemistry reducing gas sensor group 6, infrared reducing gas sensor group 7, sample gas converges ware 8, the sample gas is through refrigerating unit 9, peristaltic pump 10, prevent stifled switching electromagnetism 11, pressure switch 12, accompany hot sample trachea 13, sample inspection valve 14, filter 15, flowmeter 16 and filtration sampler 17's cooperation is used, it carries out the preliminary treatment to have solved current device automatically with the sample gas through the precooling, accompany heat, processes such as drying and filtration carry out the preliminary treatment, and the optimal control flow, the less prominent problem such as stability and reliability under the abominable operating mode of conventional equipment has thoroughly been solved.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
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 utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The utility model provides a novel anticorrosive furnace flue gas on-line measuring of boiler high temperature device, includes boiler furnace, monitoring system machine case, a plurality of companion's heat appearance trachea (13), prevents stifled switching electromagnetism (11), sample inspection valve (14), appearance gas converging ware (8), prevents stifled blowing pipe and a plurality of filtration sampler (17), its characterized in that: a plurality of filter sampler (17) welded mounting is on boiler furnace water-cooling wall fin, sample inspection valve (14) are connected with filter sampler (17) through companion's heat appearance trachea (13), and are a plurality of sample inspection valve (14) and appearance gas converge ware (8) and are connected, prevent stifled switching electromagnetism (11) and be connected with outside compressed air, prevent stifled switching electromagnetism (11) and use through preventing stifled purge tube and filter sampler (17) cooperation, the output of appearance gas converges ware (8) is connected with refrigerating unit (9), the output of refrigerating unit (9) is connected with filter (15), the output of filter (15) is connected with flowmeter (16), the output UNICOM of flowmeter (16) has calibration three-way switching valve (1), the top and the standard gas intercommunication of calibration three-way switching valve (1), the right side of the calibration three-way switching valve (1) is communicated with a suction pump (3), the right side of the suction pump (3) is connected with a flow regulating valve (4), the right side of the flow regulating valve (4) is communicated with a reducing gas sensor group, the reducing gas sensor group is connected with a PLC (programmable logic controller) controller (5) through a data communication line, and the PLC controller (5) is connected with a touch display screen (2) through a data communication line;
the filtering sampler (17) is composed of a stainless steel sampling tube, a radiating fin and a stainless steel sintered filter element, an anti-sticking nano coating is plated on the surface of the stainless steel sintered filter element, and a sample gas outlet of the filtering sampler (17) is separated from the anti-blocking purging tube;
the number of the sampling inspection valves (14) in the monitoring system chassis is consistent with the number of the installed filtering samplers (17) and corresponds to one another.
2. The novel on-line measuring device for the flue gas of the high-temperature corrosion-resistant hearth of the boiler as claimed in claim 1, is characterized in that: refrigeration unit (9) refrigerates for the compressor, the bottom of refrigeration unit (9) is connected with peristaltic pump (10), and the output of peristaltic pump (10) extends to the outside of monitoring system machine case, prevents stifled surface of sweeping the pipe and is provided with pressure switch (12).
3. The novel on-line measuring device for the flue gas of the high-temperature corrosion-resistant hearth of the boiler as claimed in claim 1, is characterized in that: the reducing gas sensor group adopts a double reducing gas sensor group measuring structure mode, which is respectively as follows: the infrared reducing gas sensor group (7) is used for the conventional detection of the sample gas and the electrochemical reducing gas sensor group (6) is used for the calibration detection.
4. The novel on-line measuring device for the flue gas of the high-temperature corrosion-resistant hearth of the boiler as claimed in claim 1, is characterized in that: the PLC (5) completes the switching control of the automatic sampling inspection valve (14), the calibration three-way switching valve (1) and the anti-blocking switching electromagnet (11) and the start-stop control of the suction pump (3) and the peristaltic pump (10) according to the system measurement condition.
5. The novel on-line measuring device for the flue gas of the high-temperature anticorrosive hearth of the boiler as claimed in claim 3, characterized in that: the calibration three-way switching valve (1), the touch display screen (2), the suction pump (3), the flow regulating valve (4), the PLC controller (5), the electrochemical reducing gas sensor group (6), the infrared reducing gas sensor group (7), the sample gas collector (8), the refrigeration unit (9), the peristaltic pump (10), the anti-blocking switching electromagnet (11), the pressure switch (12), the sampling inspection valve (14), the filter (15) and the flowmeter (16) are all located inside the monitoring system case.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120555833.XU CN215894526U (en) | 2021-03-18 | 2021-03-18 | Novel boiler high-temperature anti-corrosion furnace flue gas on-line measurement device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202120555833.XU CN215894526U (en) | 2021-03-18 | 2021-03-18 | Novel boiler high-temperature anti-corrosion furnace flue gas on-line measurement device |
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| CN202120555833.XU Active CN215894526U (en) | 2021-03-18 | 2021-03-18 | Novel boiler high-temperature anti-corrosion furnace flue gas on-line measurement device |
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- 2021-03-18 CN CN202120555833.XU patent/CN215894526U/en active Active
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