CN113790893B - Quick check and verification system and check and verification method for discharge equipment - Google Patents
Quick check and verification system and check and verification method for discharge equipment Download PDFInfo
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- CN113790893B CN113790893B CN202110812727.XA CN202110812727A CN113790893B CN 113790893 B CN113790893 B CN 113790893B CN 202110812727 A CN202110812727 A CN 202110812727A CN 113790893 B CN113790893 B CN 113790893B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/02—Details or accessories of testing apparatus
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/04—Testing internal-combustion engines
- G01M15/10—Testing internal-combustion engines by monitoring exhaust gases or combustion flame
- G01M15/102—Testing internal-combustion engines by monitoring exhaust gases or combustion flame by monitoring exhaust gases
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Abstract
The invention relates to a rapid check and verification system and a check and verification method for discharge equipment, wherein the rapid check and verification system comprises a mixed standard sample gas storage device, a fixing device of the mixed standard sample gas storage device and a discharge system; the mixed standard sample gas storage device is fixed on the transport vehicle through the fixing device; the output end of the mixed standard sample gas storage device is connected with the pressure regulating valve through a pipeline; the pressure regulating valve is connected with the first shut-off valve, the second shut-off valve and the third shut-off valve which are mutually connected in parallel; the exhaust system includes: a sample gas processing unit and an electromagnetic valve control unit; the sample gas treatment unit is provided with a mixed standard sample gas input port; the electromagnetic valve control unit is provided with a mixed standard sample gas output port. The rapid checking and verifying method for the discharge equipment can rapidly judge the accuracy of the whole measuring system, synchronously verify the accuracy of the measuring systems of the analyzers, is strong in universality, is compatible with the calibration verification of the discharge systems of different factories, and is convenient, simple, rapid, effective and high in accuracy.
Description
Technical Field
The invention relates to the field of engine testing, in particular to a rapid check and verification system and a check and verification method for emission equipment.
Background
When the engine is used for emission test, the accuracy of data measured by an emission analyzer is required to be ensured, and the accuracy of the whole emission measurement analysis system is very important to measure the emission level of an engine.
The traditional method is that by calibrating a single analyzer in the emission analysis system, the accuracy of the whole emission system cannot be rapidly and intuitively verified. The analyzer is accurate, but not necessarily ensures that the whole measurement analysis system is accurate, and the measurement analysis of the whole system can be judged by manually maintaining pressure or checking the pressure leakage of a pipeline and ensuring that the pipeline is free from leakage.
If the pipeline has leakage, which can affect the measurement result of the whole system, slight leakage is not easy to find out, various pressure and flow checks are carried out aiming at pipeline sections, different discharge equipment checking methods are inconsistent, a detector needs to have higher skill level to detect the leakage point, a great amount of time is required to be consumed for checking the leakage method, and the checking efficiency is low.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a rapid checking and verifying method for the discharge equipment, which can rapidly judge the accuracy of the whole measuring system and can synchronously verify the accuracy of the measuring system of the analyzer.
The technical scheme adopted by the invention is as follows:
a rapid check and verification system for discharge equipment,
comprising the following steps: the device comprises a mixed standard sample gas storage device, a fixing device of the mixed standard sample gas storage device and an emission system;
the mixed standard sample gas storage device is fixed on the transport vehicle through a fixing device of the mixed standard sample gas storage device;
the output end of the mixed standard sample gas storage device is connected with the pressure regulating valve through a pipeline;
the pressure regulating valve is connected with the first shut-off valve, the second shut-off valve and the third shut-off valve which are mutually connected in parallel;
the first shutoff valve is connected with the first pressure gauge;
the second shutoff valve is connected with a second pressure gauge;
the third shutoff valve is connected with a third pressure gauge;
the exhaust system includes: a sample gas processing unit and an electromagnetic valve control unit;
the sample gas treatment unit is provided with a mixed standard sample gas input port;
the electromagnetic valve control unit is provided with a mixed standard sample gas output port;
the sample gas treatment unit is connected with the electromagnetic valve control unit through a first pipeline stop device;
the first pipeline stop device comprises a three-way joint;
three shutoff valves are respectively arranged on the three-way joints;
the sample gas treatment unit is connected with the first end of the first pipeline stop device;
the electromagnetic valve control unit is connected with the second end of the first pipeline stop device;
the mixed standard sample gas output port is connected with the measurement system through a second pipeline stop device;
the mixed standard sample gas output port is connected with the first end of the second pipeline stop device;
the second end of the second pipeline stop device is connected with the input end of the measuring system;
the output end of the measuring system is connected with the gas analyzer through a pipeline;
the first pressure gauge is connected with the mixed standard sample gas input port through a pipeline;
the second pressure gauge is connected with the second end of the first pipeline stop device through a pipeline;
the third pressure gauge is connected with a third end of the second pipeline stop device through a pipeline.
Preferably, the mixed standard sample gas output port, the third end of the first pipeline cut-off device and the third end of the second pipeline cut-off device are respectively provided with a quick connector.
A verification method of a quick check verification system of discharge equipment,
the quick connector A of the calibrating device is well butted with the quick connector A1.
Step S100, starting;
step S101, the shut-off valve on the first end of the second line shut-off device is opened, the shut-off valve on the second end is opened, the shut-off valve on the third end of the second line shut-off device is closed;
step S102, a shut-off valve on a first end of the first pipeline shut-off device is opened, a shut-off valve on a second end is opened, and a shut-off valve on a third end of the first pipeline shut-off device is closed;
step S103, opening a pressure regulating valve; the first shut-off valve is opened; the second shut-off valve and the third shut-off valve are closed;
opening a pressure regulating valve of the mixed standard sample gas, monitoring the internal pressure of the mixed standard sample gas storage device, and regulating the pressure of a first pressure gauge at the gas outlet of a mixed sample gas pipeline to be 50kpa, wherein the 50kpa gas enters the whole discharge system from a mixed standard sample gas input port of a sample gas treatment unit;
step S104, starting a measuring system of the emission equipment, and simultaneously reading the analyzed tail gas concentrations SPAN1 to SPAN5 of 5 analyzers after the pressure of the gas entering the analyzers is stable;
step S105, judging whether the tail gas concentration data read by the analyzer is consistent with the target concentration of the standard mixed sample gas, and if the deviation range is +/-2.0%, determining that the whole emission measurement system is accurate and stable, and jumping to step S109; otherwise, step S106 is skipped;
the deviation of target concentration of data SPAN1 to SPAN5 read by each analyzer and the standard mixed sample gas exceeds the range + -2.0%, and the whole emission measurement system is considered to be abnormal;
step S106, judging whether air leakage exists, if so, jumping to step S107; if no leakage occurs, step S108 is skipped;
closing the first shutoff valve, continuously exhausting by the measurement system to check whether the pressure of the first pressure gauge of the pipeline is reduced to negative pressure, and maintaining the pressure to check whether the pressure is changed; if the pressure changes, the air leakage phenomenon is indicated;
step S107, detecting a pipeline leakage point and repairing the pipeline leakage;
step S108, calibrating an analyzer, and jumping to step S101;
step S109 ends.
Preferably, in the step S108, the analyzer calibration step is as follows:
closing the first shutoff valve 1 and the second shutoff valve 2, opening the third shutoff valve 3, enabling the standard mixed gas to directly enter the analyzer from the third end of the second pipeline shutoff device, and adjusting parameters of the analyzer to enable the concentration read by the analyzer to be consistent with the standard mixed gas concentration; after ensuring that the analyzer is accurate, the second shut-off valve 2 and the third shut-off valve 3 are closed again. And opening the first shutoff valve 1 to enable the standard mixed gas to directly enter the whole system from the port A1, reading the concentration of each analyzer again, and confirming that the deviation between the values of the concentration values SPAN1 to SPAN5 of each analyzer and the target concentration of the standard mixed gas is within a range of +/-2.0 percent.
Preferably, in step S107, the pipeline leakage point is detected, and the pipeline leakage is repaired as follows:
opening a second shut-off valve; the shut-off valve on the first end of the first line shut-off device is closed; a shut-off valve on the third end of the first line shut-off device is opened; regulating the pressure of the first pressure gauge at the air outlet of the mixed sample air pipeline to be 50kpa; then closing the second shutoff valve, continuously exhausting by the measurement system to check whether the pressure of the second pressure gauge of the pipeline is reduced to negative pressure, and maintaining the pressure to check whether the pressure is changed; if the pressure changes, the leakage phenomenon of the pipeline is indicated; repairing the pipeline leakage;
opening a third shut-off valve; closing the first shut-off valve; closing the second shut-off valve;
the shut-off valve on the first end of the second line shut-off device is closed; a shut-off valve on the third end of the second line shut-off device is opened; regulating the pressure of the first pressure gauge at the air outlet of the mixed sample air pipeline to be 50kpa; then closing the second shutoff valve, continuously exhausting by the measurement system to check whether the pressure of the second pressure gauge of the pipeline is reduced to negative pressure, and maintaining the pressure to check whether the pressure is changed; if the pressure changes, the leakage phenomenon of the pipeline is indicated; and (5) repairing the pipeline leakage.
Preferably, in step S103, various gas concentrations are selected and combined to form a mixed concentration sample gas to simulate the tail gas emission state of the engine, so that the standard mixed sample gas is ensured to be within the range of the analyzer and the accurate uncertainty of the concentration is less than 1%.
The standard mixed sample gas is fixed on the movable transport vehicle, so that the portable movable multi-set discharging equipment can be shared, and the movable multi-set discharging equipment is safe, reliable and not easy to loosen. The mixed sample gas cylinder is connected with a pressure regulating system through a stainless steel pipeline.
Compared with the prior art, the invention has the beneficial effects that:
the rapid checking and verifying method for the discharge equipment can rapidly judge the accuracy of the whole measuring system, can synchronously verify the accuracy of the measuring systems of the analyzers, is strong in universality, can be compatible with the calibration verification of the discharge systems of different factories, and is convenient, simple, rapid, effective and high in accuracy.
The traditional emission equipment verification method can only verify the emission analyzer body, but cannot verify the whole emission measurement analysis system. The design and verification method of the scheme can quickly judge and solve the problem of accuracy of the emission measurement system (not only the accuracy of the analyzer), and can quickly verify the accuracy of the whole emission analysis system.
In the prior art, the calibration equipment cannot calibrate a plurality of emission analyzers at the same time, so that the problem of synchronous calibration of a plurality of emission analyzer systems can be solved at the same time, and the calibration efficiency is high; the system is very convenient and visual when carrying out emission calibration or checking system pipeline leakage, can be suitable for products of a plurality of emission equipment manufacturers, and has strong universality.
Drawings
FIG. 1 is a schematic diagram of a prior art discharge apparatus rapid verification device;
FIG. 2 is a schematic diagram of a verification system for a rapid verification method for emissions equipment of the present invention;
FIG. 3 is a schematic view of a first pipeline cutoff device of the rapid verification method of the discharge apparatus of the present invention;
FIG. 4 is a schematic diagram of a second pipeline cutoff device of the rapid verification method of the discharge apparatus of the present invention;
fig. 5 is a flow chart of a discharge apparatus rapid verification method.
Detailed Description
The invention is described in detail below with reference to the attached drawings and examples:
as can be seen in fig. 1-5, a rapid verification system for emissions equipment,
comprising the following steps: the device comprises a mixed standard sample gas storage device 1, a fixing device 2 of the mixed standard sample gas storage device and an emission system;
the mixed standard sample gas storage device is fixed on the transport vehicle 3 through a fixing device 2 of the mixed standard sample gas storage device;
the output end of the mixed standard sample gas storage device is connected with the pressure regulating valve 4 through a pipeline;
the pressure regulating valve 4 is connected with a first shut-off valve 5, a second shut-off valve 6 and a third shut-off valve 7 which are mutually connected in parallel;
the first shutoff valve 5 is connected with a first pressure gauge 8;
the second shut-off valve 6 is connected with a second pressure gauge 9;
the third shut-off valve 7 is connected with a third pressure gauge 10;
the exhaust system includes: a sample gas processing unit and an electromagnetic valve control unit;
the sample gas treatment unit is provided with a mixed standard sample gas input port 11;
the electromagnetic valve control unit is provided with a mixed standard sample gas output port 12;
the sample gas processing unit is connected with the electromagnetic valve control unit through a first pipeline stop device 13;
the first pipeline stop device comprises a three-way joint;
three shutoff valves are respectively arranged on the three-way joints;
the sample gas treatment unit is connected with the first end 131 of the first pipeline stopping device;
the electromagnetic valve control unit is connected with the second end 132 of the first pipeline stopping device;
the mixed standard sample gas output port 12 is connected with a measurement system through a second pipeline stop device 14;
the mixed standard sample gas outlet 12 is connected with the first end 141 of the second pipeline stop device;
the second end 142 of the second line stop is connected to the measurement system input;
the output end of the measuring system is connected with the gas analyzer 15 through a pipeline;
the analyzer 15 includes: a NOx analyzer 151; THC analyzer 152; a CO2 analyzer 153; a CO analyzer 154;02 analyzer 155.
The first pressure gauge 8 is connected with the mixed standard sample gas input port 11 through a pipeline;
the second pressure gauge 9 is connected with a third end 133 of the first pipeline cut-off device through a pipeline;
the third pressure gauge 10 is connected to a third end 143 of the second line shut-off device by a line.
Preferably, the mixed standard sample gas outlet, the third end of the first pipeline cut-off device and the third end of the second pipeline cut-off device are respectively provided with a quick connector 16.
The first end 131 of the first line shut-off device is provided with a shut-off valve 134;
the second end 132 of the first line shut-off device is provided with a shut-off valve 135;
the third end 133 of the first line shut-off device is provided with a shut-off valve 136;
the first end 131 of the second line shut-off device is provided with a shut-off valve 144;
the second end 132 of the second line shut-off device is provided with a shut-off valve 145;
the third end 133 of the second line shut-off device is provided with a shut-off valve 146.
A verification method of a quick check verification system of discharge equipment,
step S100, starting;
step S101, the shut-off valve on the first end of the second line shut-off device is opened, the shut-off valve on the second end is opened, the shut-off valve on the third end of the second line shut-off device is closed;
step S102, a shut-off valve on a first end of the first pipeline shut-off device is opened, a shut-off valve on a second end is opened, and a shut-off valve on a third end of the first pipeline shut-off device is closed;
step S103, opening a pressure regulating valve; the first shut-off valve is opened; the second shut-off valve and the third shut-off valve are closed;
opening a pressure regulating valve of the mixed standard sample gas, monitoring the internal pressure of the mixed standard sample gas storage device, and regulating the pressure of a first pressure gauge at the gas outlet of a mixed sample gas pipeline to be 50kpa, wherein the 50kpa gas enters the whole discharge system from a mixed standard sample gas input port of a sample gas treatment unit;
step S104, starting a measuring system of the emission equipment, and simultaneously reading the analyzed tail gas concentrations SPAN1 to SPAN5 of 5 analyzers after the pressure of the gas entering the analyzers is stable;
step S105, judging whether the tail gas concentration data read by the analyzer is consistent with the target concentration of the standard mixed sample gas, and if the deviation range is +/-2.0%, determining that the whole emission measurement system is accurate and stable, and jumping to step S109; otherwise, step S106 is skipped;
the deviation of target concentration of data SPAN1 to SPAN5 read by each analyzer and the standard mixed sample gas exceeds the range + -2.0%, and the whole emission measurement system is considered to be abnormal;
step S106, judging whether air leakage exists, if so, jumping to step S107; if no leakage occurs, step S108 is skipped;
closing the first shutoff valve, continuously exhausting by the measurement system to check whether the pressure of the first pressure gauge of the pipeline is reduced to negative pressure, and maintaining the pressure to check whether the pressure is changed; if the pressure changes, the air leakage phenomenon is indicated;
step S107, detecting a pipeline leakage point and repairing the pipeline leakage;
step S108, calibrating an analyzer, and jumping to step S101;
step S109 ends.
The step S108 is the following analyzer calibration steps:
closing the first shutoff valve 5 and the second shutoff valve 6, opening the third shutoff valve 7, enabling the standard mixed gas to directly enter the analyzer from the third end of the second pipeline shutoff device, and adjusting parameters of the analyzer to enable the concentration read by the analyzer to be consistent with the standard mixed gas concentration; after ensuring that the analyzer is accurate, the second shut-off valve 6 and the third shut-off valve 7 are closed again. And opening the first shutoff valve 5 to enable the standard mixed gas to enter the whole system from the mixed standard sample gas input port, reading the concentration of each analyzer again, and confirming that the deviation of the values of the concentration values SPAN1 to SPAN5 of each analyzer and the target concentration of the standard mixed sample gas is within a range of +/-2.0 percent.
Step S107, detecting the pipeline leakage point, and repairing the pipeline leakage as follows:
opening a second shut-off valve; the shut-off valve on the first end of the first line shut-off device is closed; a shut-off valve on the third end of the first line shut-off device is opened; regulating the pressure of the first pressure gauge at the air outlet of the mixed sample air pipeline to be 50kpa; then closing the second shutoff valve, continuously exhausting by the measurement system to check whether the pressure of the second pressure gauge of the pipeline is reduced to negative pressure, and maintaining the pressure to check whether the pressure is changed; if the pressure changes, the leakage phenomenon of the pipeline is indicated; repairing the pipeline leakage;
opening a third shut-off valve; closing the first shut-off valve; closing the second shut-off valve;
the shut-off valve on the first end of the second line shut-off device is closed; a shut-off valve on the third end of the second line shut-off device is opened; regulating the pressure of the first pressure gauge at the air outlet of the mixed sample air pipeline to be 50kpa; then closing the second shutoff valve, continuously exhausting by the measurement system to check whether the pressure of the second pressure gauge of the pipeline is reduced to negative pressure, and maintaining the pressure to check whether the pressure is changed; if the pressure changes, the leakage phenomenon of the pipeline is indicated; and (5) repairing the pipeline leakage.
Preferably, in step S103, various gas concentrations are selected and combined to form a mixed concentration sample gas to simulate the tail gas emission state of the engine, so that the standard mixed sample gas is ensured to be within the range of the analyzer and the accurate uncertainty of the concentration is less than 1%.
The standard mixed sample gas is fixed on the movable transport vehicle, so that the portable movable multi-set discharging equipment can be shared, and the movable multi-set discharging equipment is safe, reliable and not easy to loosen. The mixed sample gas cylinder is connected with a pressure regulating system through a stainless steel pipeline.
The rapid checking and verifying method for the discharge equipment can rapidly judge the accuracy of the whole measuring system, can synchronously verify the accuracy of the measuring systems of the analyzers, is strong in universality, can be compatible with the calibration verification of the discharge systems of different factories, and is convenient, simple, rapid, effective and high in accuracy.
The traditional emission equipment verification method can only verify the emission analyzer body, but cannot verify the whole emission measurement analysis system. The design and verification method of the scheme can quickly judge and solve the problem of accuracy of the emission measurement system (not only the accuracy of the analyzer), and can quickly verify the accuracy of the whole emission analysis system.
In the prior art, the calibration equipment cannot calibrate a plurality of emission analyzers at the same time, so that the problem of synchronous calibration of a plurality of emission analyzer systems can be solved at the same time, and the calibration efficiency is high; the system is very convenient and visual when carrying out emission calibration or checking system pipeline leakage, can be suitable for products of a plurality of emission equipment manufacturers, and has strong universality.
The whole set of emission equipment detection system has two paths, each analyzer needs 5 minutes for single calibration, each path also has 4-5 analyzers, each calibration needs 20 minutes, and when the emission equipment detection system is used for calibration, the whole set of emission equipment calibration only needs 5 minutes, so that the time is saved. If the air leakage phenomenon occurs, the air leakage is checked more quickly by the scheme, and the efficiency is improved by 4-5 times compared with that of the conventional method. Daily reduction of calibration for at least half an hour yields the following benefits: the annual gain is increased by 12.5 ten thousand yuan per day by 500 yuan per day.
The above description is only of the preferred embodiment of the present invention, and is not intended to limit the structure of the present invention in any way. Any simple modification, equivalent variation and modification of the above embodiments according to the technical substance of the present invention fall within the technical scope of the present invention.
Claims (4)
1. A rapid checking and verifying system for discharge equipment is characterized in that,
comprising the following steps: the device comprises a mixed standard sample gas storage device, a fixing device of the mixed standard sample gas storage device and an emission system;
the mixed standard sample gas storage device is fixed on the transport vehicle through a fixing device of the mixed standard sample gas storage device;
the output end of the mixed standard sample gas storage device is connected with the pressure regulating valve through a pipeline;
the pressure regulating valve is connected with the first shut-off valve, the second shut-off valve and the third shut-off valve which are mutually connected in parallel;
the first shutoff valve is connected with the first pressure gauge;
the second shutoff valve is connected with a second pressure gauge;
the third shutoff valve is connected with a third pressure gauge;
the exhaust system includes: a sample gas processing unit and an electromagnetic valve control unit;
the sample gas treatment unit is provided with a mixed standard sample gas input port;
the electromagnetic valve control unit is provided with a mixed standard sample gas output port;
the sample gas treatment unit is connected with the electromagnetic valve control unit through a first pipeline stop device;
the first pipeline stop device comprises a three-way joint;
three shutoff valves are respectively arranged on the three-way joints;
the sample gas treatment unit is connected with the first end of the first pipeline stop device;
the electromagnetic valve control unit is connected with the second end of the first pipeline stop device;
the mixed standard sample gas output port is connected with the measurement system through a second pipeline stop device;
the mixed standard sample gas output port is connected with the first end of the second pipeline stop device;
the second end of the second pipeline stop device is connected with the input end of the measuring system;
the output end of the measuring system is connected with the gas analyzer through a pipeline;
the first pressure gauge is connected with the mixed standard sample gas input port through a pipeline;
the second pressure gauge is connected with a third end of the first pipeline cut-off device through a pipeline;
the third pressure gauge is connected with a third end of the second pipeline stop device through a pipeline.
2. The discharge apparatus rapid verification method according to claim 1, wherein: and the mixed standard sample gas output port, the third end of the first pipeline stop device and the third end of the second pipeline stop device are respectively provided with a quick connector.
3. A verification method of a discharge apparatus rapid verification system according to any one of claims 1 or 2, characterized by:
step S100, starting;
step S101, the shut-off valve on the first end of the second line shut-off device is opened, the shut-off valve on the second end is opened, the shut-off valve on the third end of the second line shut-off device is closed;
step S102, a shut-off valve on a first end of the first pipeline shut-off device is opened, a shut-off valve on a second end is opened, and a shut-off valve on a third end of the first pipeline shut-off device is closed;
step S103, opening a pressure regulating valve; the first shut-off valve is opened; the second shut-off valve and the third shut-off valve are closed;
opening a pressure regulating valve of the mixed standard sample gas, monitoring the internal pressure of the mixed standard sample gas storage device, and regulating the pressure of a first pressure gauge at the gas outlet of a mixed sample gas pipeline to be 50kpa, wherein the 50kpa gas enters the whole discharge system from a mixed standard sample gas input port of a sample gas treatment unit;
step S104, starting a measuring system of the emission equipment, and simultaneously reading the analyzed tail gas concentrations SPAN1 to SPAN5 of 5 analyzers after the pressure of the gas entering the analyzers is stable;
step S105, judging whether the tail gas concentration data read by the analyzer is consistent with the target concentration of the standard mixed sample gas, and if the deviation range is +/-2.0%, determining that the whole emission measurement system is accurate and stable, and jumping to step S109; otherwise, step S106 is skipped;
the deviation of target concentration of data SPAN1 to SPAN5 read by each analyzer and the standard mixed sample gas exceeds the range + -2.0%, and the whole emission measurement system is considered to be abnormal;
step S106, judging whether air leakage exists, closing the first shutoff valve, continuously exhausting air by the measurement system to check whether the pressure of the first pressure gauge of the pipeline is reduced to negative pressure, and maintaining the pressure to check whether the pressure is changed; if the pressure changes, the air leakage phenomenon is indicated; if so, jumping to step S107; if no leakage occurs, step S108 is skipped;
step S107, detecting the pipeline leakage point, and repairing the pipeline leakage as follows:
opening a second shut-off valve; the shut-off valve on the first end of the first line shut-off device is closed; a shut-off valve on the third end of the first line shut-off device is opened; regulating the pressure of the first pressure gauge at the air outlet of the mixed sample air pipeline to be 50kpa; then closing the second shutoff valve, continuously exhausting by the measurement system to check whether the pressure of the second pressure gauge of the pipeline is reduced to negative pressure, and maintaining the pressure to check whether the pressure is changed; if the pressure changes, the leakage phenomenon of the pipeline is indicated; repairing the pipeline leakage;
opening a third shut-off valve; closing the first shut-off valve; closing the second shut-off valve;
the shut-off valve on the first end of the second line shut-off device is closed; a shut-off valve on the third end of the second line shut-off device is opened; regulating the pressure of the first pressure gauge at the air outlet of the mixed sample air pipeline to be 50kpa; then closing the third shutoff valve, continuously exhausting by the measurement system to check whether the pressure of the third pressure gauge of the pipeline is reduced to negative pressure, and maintaining the pressure to check whether the pressure is changed; if the pressure changes, the leakage phenomenon of the pipeline is indicated; repairing the pipeline leakage;
step S108, calibrating the analyzer, closing the first shutoff valve and the second shutoff valve, opening the third shutoff valve, directly entering the standard mixed gas from the second pipeline shutoff device for analysis, and adjusting parameters of the analyzer to ensure that the concentration read by the analyzer is consistent with the concentration of the standard mixed gas; after the accuracy of the analyzer is ensured, the second shutoff valve and the third shutoff valve are closed; opening a first shutoff valve to enable the standard mixed gas to enter the whole system from a mixed standard sample gas input port, reading the concentration of each analyzer again, confirming that the deviation between the values of concentration values SPAN1 to SPAN5 of each analyzer and the target concentration of the standard mixed sample gas is within +/-2.0%, and jumping to the step S101;
step S109 ends.
4. A verification method of a rapid verification system for emissions equipment as claimed in claim 3, wherein: step S103, various gas concentrations are selected and combined to form a mixed concentration sample gas to simulate the tail gas emission state of the engine, so that the standard mixed sample gas is ensured to be in the range of the measuring range of the analyzer, and the concentration accuracy uncertainty is less than 1%.
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