Fly ash carbon content rapid measurement device and method with automatic calibration function
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A fly ash carbon content, automatic calibration technology, used in measuring devices, sampling devices, engine lubrication and other directions, can solve the problem of unguaranteed measurement accuracy, achieve simple structure, avoid pollution of the site environment, and accurate and accurate measurement. Effect
Pending Publication Date: 2020-10-16
南京大得科技有限公司
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[0005] The measurement period of the existing indirect measurement method is generally 3-5 minutes, and the measurement accuracy cannot be guaranteed
The measurement cycle of the laboratory-based high-precision burning method takes about 20 minutes
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Embodiment 1
[0049] A fast measuring device for carbon content in fly ash with automatic calibration function, such as figure 1 As shown, it includes a sampling unit, a microwave measuring unit, a feeding unit, an ash sample transmission unit, a powder returning unit, a burnt fly ash measuring instrument 22 and a program controller. in:
[0050] 1) One end of the sampling unit extends into the flue 1, and the other end is connected with the microwave measuring unit. The sampling unit adopts a self-pumping sampler without external power, including a Rafal injector 2, a sampling pipe 3, an air induction pipe 4 and a cyclone separator 5. Among them, the Rafal injector 2 is clamped on a wall in the flue 1, the injection port of the Rafal injector 2 is an oblique opening, and the opening faces away from the smoke flow direction, and the Rafal injector 2 The center of the nozzle is connected with the top of the cyclone separator 5 through the air induction pipe 4 . The sampling pipe 3 is clam...
Embodiment 2
[0065] A method for quickly measuring the carbon content of fly ash with an automatic calibration function, comprising the following steps:
[0066] Step 1: Power on the system, program control to close the ash storage valve 13, the sampling valve 16, open the ash discharge valve 18, the jet solenoid valve 20, the jet aspirator 19 produces suction, open the ash discharge solenoid valve 14, and compress Air enters the middle discharge chamber 15, and under the joint action of the jet air extractor 19, all the ash samples in the middle ash storage chamber 15 are returned to the flue 1, thereby emptying the ash samples in the middle storage chamber 15 .
[0067] The second step: close the jet solenoid valve 20, open the ash storage valve 13, empty out all the ash samples in the ash sample discharge pipe 11, the motor feeder 10, and the microwave measuring tube 6, then close the ash discharge solenoid valve 14, close Ash storage valve 13.
[0068] Step 3: Wait for the ash sample...
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Abstract
The invention provides a fly ash carbon content rapid measurement device with an automatic calibration function. The device comprises a sampling unit, a microwave measuring unit, a feeding unit, an ash sample conveying unit, a powder returning unit, a burning fly ash measuring instrument and a program controller. The microwave measuring unit comprises a microwave measuring pipe, an ash level sensor, a microwave resonant cavity and a microwave sweep frequency measuring instrument. The feeding unit comprises a motor feeder and an ash sample discharging pipe, the ash sample conveying unit comprises a discharging ash storage pipe, a middle ash storage chamber and a sample adding pipe, and the powder returning unit comprises an ash discharging electromagnetic valve, a jet flow air extractor, ajet flow electromagnetic valve and a powder returning opening. The device is simple in structure, convenient to use and high and accurate in measurement precision, meanwhile, residual fly ash is returned to the flue, the field environment is prevented from being polluted, and the device can be suitable for non-flue sampling measurement of the carbon content of the fly ash. The invention further provides a fly ash carbon content rapid measurement method with an automatic calibration function, and rapid and accurate measurement of the fly ash carbon content is achieved through combination of microwave measurement and firing measurement and data correction.
Description
technical field [0001] The invention belongs to the field of automatic detection equipment for thermal power plants, in particular to a device and method for quickly measuring the carbon content of fly ash with an automatic calibration function. Background technique [0002] The level of unburned embers in boiler fly ash of thermal power plants is an important indicator of boiler combustion efficiency, and has relatively great value for boiler combustion adjustment. Over the years, different technical routes have been adopted at home and abroad to develop the measurement of online unburned carbon content. The key problems are that the detection accuracy is generally unsatisfactory, the measurement cycle is long, the measurement accuracy cannot be guaranteed, and the equipment reliability is poor. In particular, infrared, microwave, capacitance and other detection methods are indirect measurements, and the carbon content value needs to be obtained through the calibration curv...
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